CN112964987A

CN112964987A - Portable platform door system motor state detection device and method

Info

Publication number: CN112964987A
Application number: CN202110297804.2A
Authority: CN
Inventors: 牛玉涛; 牛艳涛; 侯鹏宇; 阿克选; 杨镒成; 梁威威
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-03-19
Filing date: 2021-03-19
Publication date: 2021-06-15

Abstract

The invention belongs to the technical field of subway platform door fault detection, and particularly relates to a portable platform door system motor state detection device and method. The device comprises a power supply circuit, a storage battery, an MCU (microprogrammed control unit), a touch screen display circuit, a resistance detection circuit and a position feedback waveform detection circuit. When the device is used, firstly, the motor plug is detached from the DCU and connected with the detection device, after the connection is finished, according to the detection method, the resistance detection circuit detects that the resistance value of the interface changes, the device starts automatic detection, and the resistance value of the motor driving part is displayed through the touch screen; after the driving part finishes testing, maintenance personnel manually change the position of the sliding door so as to enable the motor to generate forward rotation or reverse rotation, and the position feedback waveform detection circuit displays the read waveform state through the touch screen; maintenance personnel can directly judge whether the motor is normal according to the touch screen display, effectively promotes platform door system fault handling efficiency.

Description

Portable platform door system motor state detection device and method

Technical Field

The invention belongs to the technical field of subway platform door fault detection, and particularly relates to a portable platform door system motor state detection device and method.

Background

The rail transit industry belongs to the public transport industry, wherein the platform door specialty influences the driving type specialty, and the platform door equipment directly influences the normal getting on and off of passengers once a fault occurs, so that the on-site requirement on the timeliness of fault treatment is extremely high. The motor is used as a power source when the platform door system acts, when the sliding door acts to open and close, the DCU (door control unit) drives the motor to rotate forward and backward to realize the action of opening and closing the sliding door, and when the motor fails on site, the sliding door can be directly opened and closed. In the actual maintenance process, the maintenance personnel generally judge through a measurement method and a replacement method when judging whether the motor is normal.

When the measuring method is used, the resistance values between the pins of the motor driving part and the position feedback part are measured by a universal meter to judge whether the motor is normal, and the method has the following problems:

1. the field detection switch is connected by using an aviation plug or a connector, the distance between pins of the connecting parts is small, the universal meter is very inconvenient to use for measurement, and the fault handling time is long.

2. When the on-site measurement is carried out, the functions and the normal resistance of each pin of the motor connector are required to be known, and the requirement on the technical level of personnel is high.

3. The waveform of the position feedback part cannot be displayed, and misjudgment is easy to occur.

When the replacement method is used, the DCU with lower requirement on the installation position is replaced firstly, if the equipment is not recovered to be normal, the motor with higher requirement on the installation position is replaced, and the specific fault part is confirmed in the mode.

In view of the above, it is desirable to provide a motor status detecting device and method for a portable platform door system.

Disclosure of Invention

Aiming at the defects and problems that the existing detection method for motor faults has inconvenient processing, long processing time and is easy to have misjudgment, the invention provides a device and a method for detecting the motor state of a portable platform door system.

The technical scheme adopted by the invention for solving the technical problems is as follows: a portable platform door system motor state detection device comprises a power supply circuit, an MCU and a display circuit, wherein the power supply circuit and the display circuit are connected with the MCU; the motor detection circuit is divided into a star detection circuit and a triangular detection circuit according to the motor wiring mode;

the star detection circuit comprises a constant current source, a differential amplifier, a matching resistor R1, a matching resistor R2, three equivalent resistors UR, WR and VR and four relays S1, S2, S3 and S4; the positive voltage input end of the differential amplifier is connected with the positive electrode of the constant current source through a matching resistor R1, the positive voltage input end of the differential amplifier is connected with the U detection terminal through a relay contact S1, and the positive voltage input end of the differential amplifier is connected with the V detection terminal through a relay contact S2; the U detection terminal is respectively connected with equivalent resistors WR and VR through an equivalent resistor UR, the other end of the equivalent resistor WR is connected with the W detection terminal, the other end of the equivalent resistor VR is connected with the V detection terminal, the W detection terminal is connected with the voltage input negative end of the differential amplifier through a relay contact S3, the V detection terminal is connected with the voltage input negative end of the differential amplifier through a relay contact S4, and the voltage input negative end of the differential amplifier is connected with the negative electrode of the constant current source through a matching resistor R2; the U detection terminal, the V detection terminal and the W detection terminal are respectively used for being connected with a three-phase connector of a motor for detection, the output end of the differential amplifier is connected with the signal input end of the controller, and the contacts of the relay S1, the relay S2, the relay S3 and the relay S4 are respectively controlled to be opened and closed by the controller;

the triangle detection circuit comprises a constant current source, a differential amplifier, a matching resistor R1, a matching resistor R2, three equivalent resistors UR, WR and VR and five relays S1, S2, S3, S4 and S5; the positive voltage input end of the differential amplifier is connected with the positive electrode of the constant current source through a matching resistor R1, the positive voltage input end of the differential amplifier is connected with the U detection terminal through a relay contact S1, and the positive voltage input end of the differential amplifier is connected with the V detection terminal through a relay contact S2; u sense terminal passes through equivalent resistance WR and connects W sense terminal, and U sense terminal passes through relay contact S3 and equivalent resistance UR and connects V sense terminal, and W sense terminal passes through relay contact S5 and connects differential amplifier voltage input negative pole end, and W sense terminal passes through equivalent resistance VR and connects V sense terminal, and V sense terminal passes through relay contact S4 and connects differential amplifier voltage input negative pole end, and differential amplifier voltage input negative pole end passes through matching resistance R2 and connects the constant current source negative pole, U sense terminal, V sense terminal and W sense terminal be used for connecting the motor three-phase joint respectively and be used for the detection, the signal input part of controller is connected to differential amplifier' S output, the contact of relay S1, relay S2, relay S3, relay S4 and relay S5 is opened and close by controller control respectively.

The motor state detection device for the portable platform door system further comprises a motor position detection circuit connected with the MCU and used for detecting position feedback waveforms, wherein the motor position detection circuit comprises a primary reverser U1A, a secondary reverser U2A and an optocoupler, the optocoupler comprises a light emitting diode and a triode, the positive electrode of a constant current source is connected with the negative electrode of the light emitting diode through the primary reverser U1A, the secondary reverser U2A and a resistor R3, and the negative electrode of the constant current source is grounded; the base electrode of the triode is connected with the MCU after being connected with the resistor R4 in series, the collector electrode of the triode is connected with the MCU, and the emitter electrode of the triode is grounded.

The motor state detection device of the portable platform door system further comprises an SD card, and the SD card is connected with the MCU and used for updating programs.

The portable platform door system motor state detection device further comprises a touch display screen, and the touch display screen is connected with the MCU.

The portable platform door system motor state detection device further comprises an alarm connected with the MCU and used for warning, and the alarm is an audible and visual alarm or a buzzer.

The portable platform door system motor state detection device further comprises a battery and a power management circuit, wherein the battery and the power management circuit are both connected with the MCU, and the battery is a polymer lithium battery.

The portable platform door system motor state detection device further comprises a state indicator light, and the state indicator light is connected with the MCU.

The motor state detection device of the portable platform door system further comprises a USB interface, and the USB interface is connected with the MCU and used for communicating with the PC.

The invention also provides a motor state detection method adopting the portable platform door system motor state detection device, which respectively detects the star-shaped wiring motor and the triangular wiring motor, wherein the star-shaped wiring motor detection method comprises the following steps:

(1) the controller controls the relay contacts S1, S2 and S3 to be closed, other contacts are opened, and the device enters a state to be tested; when the motor coils are connected, the device starts to detect the states of the UW and VW coils at the same time, when any one of the two groups of coils forms a passage, the MCU can detect the state, after the state is detected, the relay contacts S1, S2 and S3 are controlled to be disconnected, and the three groups of coils are tested one by one;

(2) the controller controls the relay contacts S1 and S4 to be closed, other contacts are opened, the voltage passes through the matching resistors R1, S1, UR, VR, S4 and the matching resistor R2 to form a channel, the voltage at two ends of the UV is detected by two ends of the differential amplifier, the voltage state is sent to the MCU, and the MCU converts the voltage state into a resistance value to be displayed; if the resistance is in the allowable range, the display of the resistance value is maintained, and the relay control S1 and S4 are controlled to be disconnected; if the resistance exceeds the allowable range, displaying the motor fault and informing maintenance;

(3) the controller controls the relay contacts S1 and S3 to be closed, other contacts are opened, the voltage passes through the matching resistors R1, S1, UR, WR, S3 and the matching resistor R2 to form a channel, the voltage at two ends of the UW is detected by two ends of the differential amplifier, the voltage state is sent to the MCU, and the MCU converts the voltage state into a resistance value to be displayed; if the resistance is in the allowable range, the display of the resistance value is maintained, and the relay contacts S1 and S3 are controlled to be disconnected; if the resistance exceeds the allowable range, displaying the motor fault and informing maintenance;

(4) the controller controls the relay contacts S2 and S3 to be closed, other contacts are opened, at the moment, the voltage passes through the matching resistors R1, S2, VR, WR, S3 and the matching resistor R2 to form a channel, the voltage at the two ends of the VW is detected by the two ends of the differential amplifier, the voltage state is sent to the MCU, and the voltage state is converted into a resistance value by the MCU to be displayed; if the resistance is in the allowable range, the display of the resistance value is maintained, and the relay contacts S2 and S3 are controlled to be disconnected; if the resistance exceeds the allowable range, displaying the motor fault and informing maintenance;

the detection method of the triangular wiring motor comprises the following steps:

(1) the controller controls the relay contacts S1, S2 and S5 to be closed, other contacts are opened, the detection device enters a state to be detected, the motor coil is connected, the UW coil and the VW coil are detected simultaneously, a channel is formed by any one of the two paths to transmit a signal to the MCU, the MCU can detect the state, after the state is detected, the relay contacts S1, S2 and S5 are controlled to be opened, and the three groups of coils are tested one by one;

(2) the controller controls relay contacts S1, S3 and S4 to be closed, other contacts are opened, voltage passes through matching resistors R1, S1, S3, UR, S4 and matching resistor R2 to form a channel, after voltages at two ends of the UV are detected by two ends of the differential amplifier, the voltage state is sent to the MCU, and the MCU converts the voltage state into a resistance value to be displayed; if the resistor is detected to be in the allowable range, the display of the resistance value is maintained, and the relay contacts S1, S3 and S4 are controlled to be disconnected; if the resistance is detected to exceed the allowable range, displaying the motor fault;

(3) the controller controls the relay contacts S1 and S5 to be closed, other contacts are opened, the voltage passes through the matching resistors R1, S1, WR, S5 and the matching resistor R2 to form a channel, the voltage at two ends of the UW is detected by two ends of the differential amplifier, the voltage state is sent to the MCU, and the MCU converts the voltage state into a resistance value to be displayed; if the resistance is in the allowable range, maintaining the display of the resistance value and controlling the relay contacts S1 and S5 to be disconnected; (ii) a If the resistance exceeds the allowable range, displaying the motor fault;

(4) the controller controls the relay contacts S2 and S5 to close and the other contacts to open. At the moment, a voltage forms a channel through matching resistors R1, S2, VR, S5 and matching resistor R2, after voltages at two ends of a VW are detected by two ends of a differential amplifier, the voltage state is sent to an MCU, and the voltage state is converted into a resistance value by the MCU to be displayed; if the resistance is in the allowable range, maintaining the display of the resistance value and controlling the relay contacts S2 and S5 to be disconnected; and if the resistance is detected to exceed the allowable range, displaying the motor fault.

The invention has the beneficial effects that:

1. the detection device is used for detecting the internal resistances of a plurality of coils under different wiring modes of the motor by a control circuit consisting of a plurality of relays.

2. The inside different parameters that are provided with the multiunit of this detection device, to the load selection of difference correspond the parameter can, satisfy the maintenance detection demand of different motors.

3. The detection device can judge the revolution and the forward and reverse rotation directions of the motor according to the position feedback waveform detection circuit, and is convenient for maintenance personnel to observe.

4. The detection device has a resistance state maintaining function, after the resistance value test of the motor driving part is completed, the resistance value is maintained by the device, and when the external resistance value is changed again, the display of the resistance state of the part cannot be influenced.

5. The detection device is provided with a buzzer, the buzzer is connected with the MCU, and when the MCU receives detection, a threshold value or a waveform is inconsistent with the setting, the sound prompt which can automatically alarm to respond is given.

6. The detection device is provided with a state indicator light, when the device is in a resistance value test state of a motor driving part, the indicator light displays red, and at the moment, the position of the sliding door is forbidden to be changed; after the resistance test of the motor driving part is completed, the resistance display result is kept, the relay inside the device is disconnected, the influence of voltage on the measurement result is prevented from being generated by changing the position of the sliding door, the state indicator lamp is in green display, meanwhile, the buzzer sends out a sound prompt tone, and the device enters a position feedback waveform detection state.

7. The detection device has the SD card upgrading function, can be upgraded through the SD card when the device updates a program, and simultaneously ensures that the SD card upgrading function and the device cannot be influenced if the upgrading fails; the USB interface of the detection device can communicate with a PC, can realize OTG firmware upgrade of instrument programs, and can also realize the function of exporting stored data.

8. The detection device has the functions of automatic detection and manual detection, when the connection of a detected component is detected, the detection is automatically started, and after the detected component is disconnected, the measurement can be automatically stopped; when the automatic detection is invalid, the control can be realized in a manual control mode.

9. This detection device adopts polymer lithium ion battery as the power supply, and there are lithium battery charging management circuit and power management circuit inside, under the prerequisite of guaranteeing the device live time, reduction device volume that can be very big makes the device easily carry more.

Drawings

FIG. 1 is a block diagram of the overall structure of the present invention.

Fig. 2 is a schematic diagram of motor coil resistance detection.

Fig. 3 is a star connection motor detection schematic diagram.

Fig. 4 is a schematic diagram of the detection of a triangular wiring motor.

Fig. 5 is a schematic diagram of position feedback waveform detection.

Fig. 6 is a schematic diagram of switching between star connection motor detection and triangular connection motor detection.

FIG. 7 is a diagram of the switching control of the detection circuit according to the present invention.

Reference numbers in the figures: reference numeral 1 denotes a first stationary contact of the switch K1, 2 denotes a second stationary contact of the switch K1, 3 denotes a first stationary contact of the switch K2, 4 denotes a second stationary contact of the switch K2, 5 denotes a first stationary contact of the switch K4, and 6 denotes a second stationary contact of the switch K4.

Detailed Description

The invention is further illustrated with reference to the following figures and examples.

Example 1: the detection device shown in fig. 1 is designed for the motor state in the failure of the platform door system, and comprises a power supply circuit, a battery, an MCU (microprogrammed control unit), a touch display circuit, a motor detection circuit and an alarm, wherein the alarm can be an audible and visual alarm or a buzzer according to requirements, and the battery can be a polymer lithium battery; power supply circuit, touch-sensitive screen display circuit, resistance detection circuit and alarm all are connected with MCU, and MCU will detect the condition and feed back to the display screen on so that judge whether break down. The device can set up multiunit different parameter in inside, selects corresponding parameter to the load difference to satisfy the maintenance detection demand of different motors.

The motor detection circuit is divided into a star detection circuit and a triangle detection circuit according to the motor wiring mode.

Before the motor wiring mode is used, the corresponding detection circuit is selected for star-shaped wiring or triangular wiring according to the judgment of the motor wiring mode, two-dimensional code information can be printed on a motor shell, the specific wiring mode of the motor can be displayed on a display screen by scanning the two-dimensional code, and therefore the detection circuit can be selected conveniently.

If the star connection mode is adopted, a star detection circuit is selected, and the detection structure of the star detection circuit is shown in fig. 2 and 3, wherein the star detection circuit comprises a constant current source, a differential amplifier, a matching resistor R1, a matching resistor R2, three equivalent resistors UR, WR and VR and four relays S1, S2, S3 and S4; the positive voltage input end of the differential amplifier is connected with the positive electrode of the constant current source through a matching resistor R1, the positive voltage input end of the differential amplifier is connected with the U detection terminal through a relay contact S1, and the positive voltage input end of the differential amplifier is connected with the V detection terminal through a relay contact S2; the U detection terminal is respectively connected with equivalent resistors WR and VR through an equivalent resistor UR, the other end of the equivalent resistor WR is connected with the W detection terminal, the other end of the equivalent resistor VR is connected with the V detection terminal, the W detection terminal is connected with the voltage input negative end of the differential amplifier through a relay contact S3, the V detection terminal is connected with the voltage input negative end of the differential amplifier through a relay contact S4, and the voltage input negative end of the differential amplifier is connected with the negative electrode of the constant current source through a matching resistor R2; the U detection terminal, the V detection terminal and the W detection terminal are respectively used for being connected with a three-phase connector of a motor for detection, the output end of the differential amplifier is connected with the signal input end of the controller, and contacts of the relay S1, the relay S2, the relay S3 and the relay S4 are controlled to be opened and closed by the controller respectively.

When the device is used, firstly, a motor plug is detached from a DCU and connected with the detection device, for convenience of introduction, equivalent resistances of three groups of coils of the motor are respectively defined as UR, WR and VR, and because the resistance of a single coil cannot be measured under the condition that star connection is not achieved, the device respectively measures the sum of the resistances of two groups of coils among the three groups of coils during measurement, and the states of the three groups of coils including UV, UW and VW are displayed.

When the power-on or manual state is switched to the state detection of the motor coils, the controller controls the relay contacts S1, S2 and S3 to be closed, other contacts are opened, the device enters a state to be detected, after the motor coils are connected, the device starts to detect the states of the UW and VW coils at the same time, when any one of the two groups of coils forms a passage, the MCU can detect the state, and after the state is detected, the relay contacts S1, S2 and S5 are controlled to be opened, and the three groups of coils are tested one by one.

When UV is detected, the controller controls the relay contacts S1 and S4 to be closed, other contacts are opened, at the moment, voltage passes through the matching resistors 1, S1, UR, VR, S4 and the matching resistor 2 to form a channel, after the voltage at two ends of the UV is detected at two ends of the differential amplifier, the voltage state is sent to the MCU, the MCU converts the voltage state into a resistance value to be displayed, when the resistance is detected to be within an allowable range, the display of the resistance value is kept, and the relay control switches S1 and S4 are controlled to be opened. When the resistor is detected to exceed the allowable range, the buzzer alarms, and the display displays the motor fault and informs maintenance personnel to replace the motor.

After the UV detection is finished, the UW detection is automatically started, and in the detection, the relay contacts S1 and S3 are controlled to be closed by the controller, and other contacts are opened. At the moment, the voltage passes through the matching resistors 1, S1, UR, WR, S3 and the matching resistor 2 to form a channel, after the voltage at two ends of the UW is detected at two ends of the differential amplifier, the voltage state is sent to the MCU, the MCU converts the voltage state into a resistance value to display, when the resistance is detected to be within an allowable range, the display of the resistance value is kept, and the relay control switches S1 and S3 are controlled to be switched off. When the resistor is detected to exceed the allowable range, the buzzer alarms, and the display displays the motor fault and informs maintenance personnel to replace the motor.

After the UW detection is finished, the VW detection is automatically started, and when the VW detection is finished, the relay contacts S2 and S3 are controlled to be closed by the controller, and other contacts are opened. At the moment, a voltage passes through the matching resistors 1, S2, VR, WR, S3 and the matching resistor 2 to form a channel, after the voltage at the two ends of the VW is detected by the two ends of the differential amplifier, the voltage state is sent to the MCU, the MCU converts the voltage state into a resistance value to display, when the resistance is detected to be within an allowable range, the display of the resistance value is kept, and the relay control switches S2 and S3 are controlled to be switched off. When the resistor is detected to exceed the allowable range, the buzzer alarms, and the display displays the motor fault and informs maintenance personnel to replace the motor.

Through the process, the detection of the coil state of the star connection motor can be completed, after the detection is completed, the S1-S4 switches are all in a disconnected state, the device controls the green display of the indicator light, and meanwhile, the buzzer sends out a sound prompt tone to prompt maintenance personnel to change the state of the sliding door to perform position feedback waveform detection.

If the connection mode is triangle connection mode, the triangle detection circuit is selected, as shown in fig. 2 and fig. 4.

For convenience of introduction, equivalent resistances of three groups of coils of the motor are respectively defined as UR, WR and VR, and three groups of states of UV, UW and VW are displayed.

When the power-on or manual state is switched to the state detection of the motor coils, the controller controls the relay contacts S1, S2 and S5 to be closed, other contacts are opened, the device enters a state to be detected, after the motor coils are connected, the device starts to detect the states of the UW and VW coils at the same time, when any one of the two groups of coils forms a passage, the MCU can detect the state, and after the state is detected, the relay contacts S1, S2 and S5 are controlled to be opened, and the three groups of coils are tested one by one.

When UV is detected, the relay contacts S1, S3 and S4 are closed and the other contacts are opened under the control of the controller. At the moment, a voltage forms a path through the matching resistors 1, S1, S3, UR, S4 and the matching resistor 2, after voltages at two ends of the UV are detected by two ends of the differential amplifier, the voltage state is sent to the MCU, the MCU converts the voltage state into a resistance value to display, when the resistance is detected to be within an allowable range, the display of the resistance value is kept, and the relay contacts S1, S3 and S4 are controlled to be disconnected. When the resistor is detected to exceed the allowable range, the buzzer alarms, and the display displays the motor fault and informs maintenance personnel to replace the motor.

After the UV detection is finished, the UW detection is automatically started, and in the detection, the relay contacts S1 and S5 are controlled to be closed by the controller, and other contacts are opened. At the moment, a voltage passes through the matching resistors 1, S1, WR, S5 and the matching resistor 2 to form a channel, after the voltage at two ends of the UW is detected by two ends of the differential amplifier, the voltage state is sent to the MCU, the MCU converts the voltage state into a resistance value to display, when the resistance is detected to be within an allowable range, the display of the resistance value is kept, and the relay contacts S1 and S5 are controlled to be disconnected. When the resistor is detected to exceed the allowable range, the buzzer alarms, and the display displays the motor fault and informs maintenance personnel to replace the motor.

After the UW detection is finished, the VW detection is automatically started, and when the VW detection is finished, the relay contacts S2 and S5 are controlled to be closed by the controller, and other contacts are opened. At the moment, a voltage passes through the matching resistors 1, S2, VR, S5 and the matching resistor 2 to form a channel, after the voltage at two ends of the VW is detected by two ends of the differential amplifier, the voltage state is sent to the MCU, the MCU converts the voltage state into a resistance value to display, when the resistance is detected to be within an allowable range, the display of the resistance value is kept, and the relay contacts S2 and S5 are controlled to be disconnected. When the resistor is detected to exceed the allowable range, the buzzer alarms, and the display displays the motor fault and informs maintenance personnel to replace the motor.

Through the process, the detection of the coil state of the star connection motor can be completed, after the detection is completed, the S1-S5 switches are all in a disconnected state, the device controls the green display of the indicator light, and meanwhile, the buzzer sends out a sound prompt tone to prompt maintenance personnel to change the state of the sliding door to perform position feedback waveform detection.

Example 2: in order to further improve the performance of the detection device, a motor position waveform detection circuit and a state indicator lamp are further arranged, the state indicator lamp is connected with the MCU, when the device is in a resistance value test state of a motor driving part, the indicator lamp displays red, and at the moment, the position of the sliding door is forbidden to be changed; after the resistance test of the motor driving part is completed, the resistance display result is kept, the relay inside the device is disconnected, the influence of voltage on the measurement result is prevented from being generated by changing the position of the sliding door, the state indicator lamp is in green display, meanwhile, the buzzer sends out a sound prompt tone, and the device enters a position feedback waveform detection state.

The motor position waveform detection circuit can be connected with the MCU for detection as shown in fig. 5, and comprises a primary reverser U1A, a secondary reverser U2A, an optocoupler and a current-limiting resistor, wherein the optocoupler comprises a light-emitting diode and a triode, and the anode of a constant current source is connected with a power supply end through current-limiting resistors R1 and R2; the positive electrode of the constant current source is connected with the cathode of the light emitting diode through the primary reverser U1A, the secondary reverser U2A and the resistor R3, and the cathode of the constant current source is grounded; the base electrode of the triode is connected with the MCU after being connected with the resistor R4 in series, the collector electrode of the triode is connected with the MCU, and the emitter electrode of the triode is grounded.

When carrying out position feedback waveform detection, through manual change sliding door position, motor position detection circuitry will output switching value level signal, and the signal carries out the drive opto-coupler after signal amplification through the two-stage reverser, and the opto-coupler feeds back motor position state to MCU, and MCU judges the rotational speed and the direction of motor through the state signal to whole passageway after carrying out the analysis. When channel data cannot be uploaded, the fault of the motor position feedback circuit can be judged, the buzzer is used for alarming, the display displays the motor fault, and maintenance personnel is informed to replace the motor.

Above motor state to the platform door system fault process judges to design, can solve the problem that uses general multiplexer utensil fault diagnosis difficulty among the field repair process, improvement fault treatment efficiency that can be very big. The detection device can be special equipment and mainly aims at detecting the motors adopting the same control mode, and can also adopt a plurality of groups of interfaces to realize detection on the motors adopting different control modes, thereby having stronger universality.

Example 3: the embodiment also has an SD card upgrading function on the basis of the

embodiments

1 and 2, the SD card is connected with the MCU for updating the program, the device can upgrade through the SD card when updating the program, and it is ensured that if the upgrading fails, the SD card upgrading function and the device are not affected; the USB interface of the detection device can communicate with a PC, can realize OTG firmware upgrade of instrument programs, and can also realize the function of exporting stored data.

Meanwhile, the detection device has the functions of automatic detection and manual detection, when the connection of the detected component is detected, the detection is automatically started, and after the detected component is disconnected, the measurement can be automatically stopped; when the automatic detection is invalid, the control can be realized in a manual control mode.

Example 4: the embodiment 1 of the invention can select different detection circuits for detection aiming at different wiring modes, and can solve the problems of inconvenient measurement, long processing time and easy misjudgment of the existing multimeter, but a plurality of platform doors are arranged on one subway line, the motor wiring modes of the platform doors on one subway line are sometimes not completely consistent, and the motor purchasing batches are different due to the fact that the motor needs to be replaced when the motor is failed under many conditions, so that the motor wiring modes are different, the motor needs to be selected according to different motor wiring modes in two kinds of detection, however, the number of devices which can be carried by an individual is limited, and the problems of troublesome replacement, space occupation and inconvenient carrying when the two kinds of devices are carried are solved.

In order to solve the above problems, this embodiment is improved on the basis of embodiment 1, and realizes the random switching between the star detection circuit and the triangle detection circuit, thereby effectively solving the problems of inconvenient carrying and troublesome replacement. The solution of the present embodiment to solve the technical problem specifically refers to fig. 2, fig. 6, and fig. 7.

As can be seen, the detection device comprises a power supply circuit, an MCU, a display circuit and a detection circuit, wherein the power supply circuit and the display circuit are both connected with the MCU,

the detection circuit comprises a constant current source, a differential amplifier, a matching resistor R1, a matching resistor R2, three equivalent resistors UR, WR and VR, relays S1, S2, S3, S4, S5 and S30, and change-over switches K1, K2, K3 and K4; the positive voltage input end of the differential amplifier is connected with the positive electrode of the constant current source through a matching resistor R1, the positive voltage input end of the differential amplifier is connected with the U detection terminal through a relay contact S1, and the positive voltage input end of the differential amplifier is connected with the V detection terminal through a relay contact S2; the U detection terminal is connected with the equivalent resistor UR through a first static contact 1 of the switch K1, and the other end of the equivalent resistor UR is connected with the equivalent resistor WR through a relay contact S3; the other end of the equivalent resistor WR is connected with the W detection terminal and is grounded through a relay contact S30 and a matching resistor R2; the first stationary contact 3 and the second stationary contact 4 of the switch K2 are connected to both ends of the equivalent resistance UR, respectively.

The V detection terminal is connected with an equivalent resistor VR through a change-over switch K3, the other end of the equivalent resistor VR is connected with the negative electrode of the constant current source through a first static contact 5 of a change-over switch K4 and a matching resistor R2 respectively, and a second static contact 6 of a change-over switch K4 and a relay contact S4 are connected with the voltage input negative electrode end of the differential amplifier; the V-detect terminal is connected to the negative terminal of the differential amplifier voltage input through relay contact S4.

The voltage input negative terminal of the differential amplifier is connected with the negative electrode of the constant current source through a relay contact S5 and a matching resistor R2; the U detection terminal, the V detection terminal and the W detection terminal are respectively used for connecting a three-phase connector of a motor for detection, and the output end of the differential amplifier is connected with the signal input end of the controller; the switch K1-K4 is switched by one key controlled by the controller.

After the code scanning verification of the motor wiring mode, if the motor wiring mode is a star-shaped wiring mode, the motor is switched to the detection circuit a in the figure 6, at the moment, the switch K3 is disconnected, the movable contact of the single-pole double-throw switch K1 is connected with the first fixed contact, and the movable contacts of the single-pole double-throw switches K2 and K4 are both connected with the second fixed contact.

When measurement is carried out, when the power-on or manual state is switched to the state detection of the motor coil, the controller controls the relay contacts S1, S2 and S3 to be closed, other contacts are opened, the device enters a state to be detected, after the motor coil is connected, the device starts to detect the states of the UW coil and the VW coil at the same time, when any one of the two groups of coils forms a passage, the MCU can detect the state, after the state is detected, the relay contacts S1, S2 and S3 are controlled to be opened, and the three groups of coils are tested one by one;

when UV is detected, the relay contacts S1 and S4 are closed and the other contacts are opened under the control of the controller. At the moment, the voltage passes through matching resistors R1, S1, K1, UR, K2, VR, K4, S4 and matching resistor R2 to form a channel, after the voltage at two ends of the UV is detected by two ends of the differential amplifier, the voltage state is sent to the MCU, the MCU converts the voltage state into a resistance value to be displayed, when the resistance is detected to be within an allowable range, the display of the resistance value is kept, and the relay contacts S1 and S4 are controlled to be disconnected. When the resistor is detected to exceed the allowable range, the buzzer alarms, and the display displays the motor fault and informs maintenance personnel to replace the motor.

After the UV detection is finished, the UW detection is automatically started, and during the detection, the relay contacts S1, S3 and S30 are controlled by the controller to be closed, and other contacts are opened. At the moment, the voltage passes through matching resistors R1, S1, K1, UR, S3, WR and S30 to form a channel through matching resistor R2, after the voltage at two ends of UW is detected by two ends of the differential amplifier, the voltage state is sent to the MCU, the MCU converts the voltage state into a resistance value to be displayed, when the resistance is detected to be within an allowable range, the display of the resistance value is kept, and the relay contacts S1, S3 and S30 are controlled to be disconnected. When the resistor is detected to exceed the allowable range, the buzzer alarms, and the display displays the motor fault and informs maintenance personnel to replace the motor.

After the UW detection is finished, the VW detection is automatically started, and during the detection, the relay contacts S2, S3 and S30 are controlled by the controller to be closed, and other contacts are opened. At the moment, the voltage passes through matching resistors R1, S2, K4, VR, K2, WR, S3, WR, S30 and matching resistor R2 to form a channel, after the voltage at two ends of the VW is detected by two ends of the differential amplifier, the voltage state is sent to the MCU, the MCU converts the voltage state into a resistance value to be displayed, when the resistance is detected to be within an allowable range, the display of the resistance value is kept, and the relay contacts S2, S3 and S30 are controlled to be disconnected. When the resistor is detected to exceed the allowable range, the buzzer alarms, and the display displays the motor fault and informs maintenance personnel to replace the motor.

Through the process, the detection of the star connection motor coil state can be completed, after the detection is completed, the contacts of the relays S1, S2, S3, S4 and S30 are all in a disconnected state, the green display of the device control indicator light is realized, and meanwhile, the buzzer sends out a sound prompt tone to prompt maintenance personnel to change the state of the sliding door to perform position feedback waveform detection.

After code scanning verification, if the connection mode is a triangular connection mode, the controller controls the change-over switch to be switched from the star connection mode detection circuit to the triangular connection mode in a one-key mode, at the moment, the switch K3 is closed, the movable contact of the single-pole double-throw switch K1 is connected with the second fixed contact, and the movable contacts of the single-pole double-throw switches K2 and K4 are both connected with the first fixed contact.

When the power-on or manual state is switched to the state detection of the motor coil, the controller controls the relay contacts S1, S2, S5 and S30 to be closed, other contacts are opened, the device enters a state to be detected, after the motor coil is connected, the device starts to detect the states of the UW coil and the VW coil at the same time, when any one of the two groups of coils forms a passage, the MCU can detect the state, and after the state is detected, the relay contacts S1, S2, S5 and S30 are controlled to be opened, and the three groups of coils are tested one by one;

when UV is detected, the controller controls the relay contacts S1, S3 and S4 to be closed, other contacts are opened, at the moment, voltage passes through the matching resistors R1, S1, K1, S3, UR, K2, K3, S4, S5 and the matching resistor R2 to form a channel, after voltages at two ends of the UV are detected at two ends of the differential amplifier, the voltage state is sent to the MCU, the MCU converts the voltage state into a resistance value to display, when the resistance is detected to be within an allowable range, the display of the resistance value is maintained, and the relay contacts S1, S3 and S4 are controlled to be opened. When the resistor is detected to exceed the allowable range, the buzzer alarms, and the display displays the motor fault and informs maintenance personnel to replace the motor.

After UV detection is finished, UW detection is automatically started, during detection, the controller controls relay contacts S1, S5 and S30 to be closed, other contacts are opened, at the moment, voltage passes through matching resistors R1, S1, K1, WR, S30, S5 and matching resistor R2 to form a channel, after voltages at two ends of the UW are detected at two ends of a differential amplifier, the voltage state is sent to a MCU, the MCU converts the voltage state into a resistance value to display, when the resistance is detected to be within an allowable range, the display of the resistance value is maintained, and the relay contacts S1, S5 and S30 are controlled to be opened. When the resistor is detected to exceed the allowable range, the buzzer alarms, and the display displays the motor fault and informs maintenance personnel to replace the motor.

After the UW detection is finished, the VW detection is automatically started, and during the detection, the relay contacts S2 and S5 are controlled to be closed by the controller, and other contacts are opened. At the moment, the voltage passes through the matching resistors R1, S2, K3, VR, K4, S5 and the matching resistor R2 to form a channel, the voltage state is sent to the MCU after the voltage at the two ends of the VW is detected by the two ends of the differential amplifier, the MCU converts the voltage state into a resistance value to be displayed, when the resistance is detected to be within an allowable range, the display of the resistance value is kept, and the relay contacts S2 and S5 are controlled to be disconnected. When the resistor is detected to exceed the allowable range, the buzzer alarms, and the display displays the motor fault and informs maintenance personnel to replace the motor.

Through the process, the detection of the state of the star connection motor coil can be completed, after the detection is completed, contacts of S1, S2, S3, S4, S5 and S30 are all in a disconnected state, the device controls the green display of the indicator light, and meanwhile, the buzzer sends out a sound prompt tone to prompt maintenance personnel to change the state of the sliding door to perform position feedback waveform detection.

The electric shock position of the selector switch is controlled through the controller, so that one-key switching of the star-shaped wiring motor detection circuit and the triangular wiring motor detection circuit is realized, an operator does not need to carry two detection devices when using the electric shock position selector switch, and the real-time switching of the two detection circuits can be realized only by controlling the electric shock position of the selector switch, so that the electric shock position selector switch is more convenient and fast.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and scope of the present invention are intended to be covered thereby.

Claims

1. The utility model provides a portable platform door system motor state detection device, includes power supply circuit, MCU, display circuit, and power supply circuit and display circuit all are connected its characterized in that with MCU: the motor detection circuit is divided into a star detection circuit and a triangular detection circuit according to the motor wiring mode;

2. A portable platform door system motor status detection apparatus according to claim 1, wherein: the motor position detection circuit is connected with the MCU and used for detecting position feedback waveforms, the motor position detection circuit comprises a primary reverser U1A, a secondary reverser U2A and an optocoupler, the optocoupler comprises a light emitting diode and a triode, the positive pole of a constant current source is connected with the negative pole of the light emitting diode through the primary reverser U1A, the secondary reverser U2A and a resistor R3, and the negative pole of the constant current source is grounded; the base electrode of the triode is connected with the MCU after being connected with the resistor R4 in series, the collector electrode of the triode is connected with the MCU, and the emitter electrode of the triode is grounded.

3. A portable platform door system motor status detection apparatus according to claim 1, wherein: the system also comprises an SD card, and the SD card is connected with the MCU and used for updating the program.

4. A portable platform door system motor status detection apparatus according to claim 1, wherein: the touch display screen is connected with the MCU.

5. A portable platform door system motor status detection apparatus according to claim 1, wherein: the alarm is connected with the MCU and used for warning, and the alarm is one of an audible and visual alarm or a buzzer.

6. A portable platform door system motor status detection apparatus according to claim 1, wherein: the battery and the power management circuit are both connected with the MCU, and the battery is a polymer lithium battery.

7. A portable platform door system motor status detection apparatus according to claim 1, wherein: still include status indicator lamp, status indicator lamp is connected with MCU.

8. A portable platform door system motor status detection apparatus according to claim 1, wherein: the USB interface is connected with the MCU and used for communicating with the PC.

9. A motor state detection method of a motor state detection device of a portable platform door system according to claim 1, characterized in that: the star connection motor detection method comprises the following steps of:

(2) the controller controls the relay contacts S1 and S4 to be closed, other contacts are opened, the voltage passes through the matching resistors R1, S1, UR, VR, S4 and the matching resistor R2 to form a channel, the voltage at two ends of the UV is detected by two ends of the differential amplifier, the voltage state is sent to the MCU, and the MCU converts the voltage state into a resistance value to be displayed; if the resistance is in the allowable range, maintaining the display of the resistance value and controlling the relay contacts S1 and S4 to be disconnected; if the resistance exceeds the allowable range, displaying the motor fault and informing maintenance;

(3) the controller controls the relay contacts S1 and S5 to be closed, other contacts are opened, the voltage passes through the matching resistors R1, S1, WR, S5 and the matching resistor R2 to form a channel, the voltage at two ends of the UW is detected by two ends of the differential amplifier, the voltage state is sent to the MCU, and the MCU converts the voltage state into a resistance value to be displayed; if the resistance is in the allowable range, maintaining the display of the resistance value and controlling the relay contacts S1 and S5 to be disconnected; if the resistance exceeds the allowable range, displaying the motor fault;

(4) the controller controls the relay contacts S2 and S5 to be closed, other contacts are opened, at the moment, the voltage passes through the matching resistors R1, S2, VR, S5 and the matching resistor R2 to form a channel, after the voltage at the two ends of the VW is detected by the two ends of the differential amplifier, the voltage state is sent to the MCU, and the MCU converts the voltage state into a resistance value to be displayed; if the resistance is in the allowable range, maintaining the display of the resistance value and controlling the relay contacts S2 and S5 to be disconnected; and if the resistance is detected to exceed the allowable range, displaying the motor fault.