CN113687288B - Detection device and control method for output characteristics of non-contact voltage sensor - Google Patents
Detection device and control method for output characteristics of non-contact voltage sensor Download PDFInfo
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- CN113687288B CN113687288B CN202111110971.8A CN202111110971A CN113687288B CN 113687288 B CN113687288 B CN 113687288B CN 202111110971 A CN202111110971 A CN 202111110971A CN 113687288 B CN113687288 B CN 113687288B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
- G01R35/007—Standards or reference devices, e.g. voltage or resistance standards, "golden references"
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B11/00—Automatic controllers
- G05B11/01—Automatic controllers electric
- G05B11/36—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential
- G05B11/42—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential for obtaining a characteristic which is both proportional and time-dependent, e.g. P. I., P. I. D.
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/21—Pc I-O input output
- G05B2219/21137—Analog to digital conversion, ADC, DAC
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Abstract
The invention discloses a detection device and a control method for the output characteristics of a non-contact voltage sensor, comprising the following steps: the device comprises a controller, a data acquisition device, an actuator and a fixed bracket; the controller is respectively connected with the data acquisition device and the executor; the controller controls the first actuator and the second actuator to enable the cable to be tested to move along a preset path of the controller in the movable area and to stop at a preset measuring position of the controller; the data acquisition device is used for detecting the voltage value of the cable to be tested at a preset measurement position and transmitting the voltage value to the controller; the controller records a preset measuring position and a voltage value thereof. According to the invention, the position coordinates are established for the preset measurement positions, each preset measurement position corresponds to one position coordinate, so that each position coordinate corresponds to the voltage value acquired by the data acquisition device, synchronous measurement of the conductor position and the measurement voltage under different spatial positions of the conductor to be measured is realized, and the output characteristic of the non-contact voltage sensor is obtained.
Description
Technical Field
The invention relates to the field of measurement, in particular to a detection device and a control method for the output characteristics of a non-contact voltage sensor.
Background
In power system construction, operation, monitoring and management applications, voltage measurement has its important role, and voltage levels of power equipment, cable devices are extremely critical to reflect the operational status of power systems and devices. In the conventional voltage measurement method, a conductor to be measured needs to be contacted with a measurement probe, namely, the contact voltage measurement method requires that a metal part of a cable to be measured is exposed or is subjected to contact detection through an invasive measurement probe, and the method has two defects: (1) The installation is difficult, the primary side of the line needs to be installed in a power failure due to the fact that the conductors need to be contacted, the power supply quality is affected, and the installation difficulty is high; (2) The potential safety hazard is serious, and when the contact measurement is carried out, the insulating layer is damaged, and the operation safety of the power cable and the equipment faces serious examination.
In order to solve the problems, the non-contact voltage measurement technology has been developed, the non-contact characteristic avoids potential safety hazards caused by cable invasion during voltage measurement, and the operation is simple and convenient, thereby conforming to the time background of the construction of the electric power Internet of things. The non-contact voltage measurement mode is generally realized based on an electric field coupling effect, for any charged conductor, because of the movement and distribution of charges, a vector electric field excited by the charges exists around the charged conductor, the vector electric field has a unique determined relation with the charge distribution, the space position and the conductor electromotive force of the charged conductor, after the space charges are collected and calculated and calibrated based on a corresponding algorithm, the voltage value of the charged conductor or a cable can be indirectly obtained, so that the non-contact measurement of the voltage is realized, the size of the spatially collected charges is closely related to the relative position between the conductor and a charge measurement electrode according to the Helmholtz theorem, and the measurement precision caused by the fluctuation of the measured voltage has a larger influence when the relative position changes, so that the corresponding relation between the output characteristic of a non-contact voltage sensor and the spatial position change of the conductor to be measured is required to be determined for the non-contact measurement of the voltage.
Disclosure of Invention
The invention aims to provide a detection device and a control method for the output characteristic of a non-contact voltage sensor, which can determine the corresponding relation between the output characteristic of the non-contact voltage sensor and the spatial position change of a conductor to be detected and obtain the output characteristic of the non-contact voltage sensor.
In order to achieve the above object, the present invention provides the following solutions:
the detection device for the output characteristics of the non-contact voltage sensor is characterized by comprising a controller, a data acquisition device, a first actuator, a second actuator and a fixed bracket;
the first actuator comprises a first motor and a first screw rod, the second actuator comprises a second motor and a second screw rod, and the first screw rod is vertically connected with the second screw rod;
the fixed support comprises a first fixed support and a second fixed support, and the first motor drives the first fixed support to axially move along the first screw rod; the second motor drives the second fixing bracket to axially move along the second screw rod;
the first fixing bracket is provided with a hole; the second fixing bracket is used for fixing the cable to be tested so that the cable to be tested passes through the hole;
the controller is used for controlling the first motor and the second motor to enable the cable to be tested to generate relative displacement in the hole;
the data acquisition device comprises a plurality of induction electrodes; the plurality of sensing electrodes disposed around the aperture; the device is used for collecting voltage values of the cable to be tested at different positions of the hole and transmitting the voltage values to the controller.
Optionally, the first actuator further comprises a first coupler, and the first coupler is connected with the first motor and the first screw rod respectively; the second actuator further comprises a second coupler, and the second coupler is respectively connected with the second motor and the second screw rod.
Optionally, the data acquisition device further comprises a voltage transformer; the voltage transformer is arranged on the cable to be tested and used for calibrating the voltage value acquired by the induction electrode.
Optionally, the data acquisition device further comprises a fixing piece, wherein holes with regular patterns are formed in a radial plane where the fixing piece is located; the sensing electrodes are uniformly arranged on the fixing piece around the central axis of the hole, and the distances from the sensing electrodes to the edge of the hole are the same.
Optionally, the second fixing bracket comprises a cross beam and a suspension arm, and the cross beam is vertically arranged on the second screw rod; and the suspension arm is fixed on the cross beam and used for fixing the cable to be tested.
A detection method of the output characteristic of a non-contact voltage sensor comprises the following steps:
determining a movable area of the cable to be tested;
determining a moving path of the cable to be tested according to the movable area;
determining discrete measurement position coordinates according to the movement path;
determining a position voltage according to the measured position coordinates;
determining the corresponding relation between the measured position coordinates and the position voltage according to the position voltage;
and obtaining the output characteristic of the non-contact voltage sensor according to the corresponding relation.
Optionally, the determining discrete measurement position coordinates according to the moving path specifically includes:
and establishing a plane coordinate system on the plane of the fixing piece, wherein each discrete measuring position on the moving path has a unique corresponding measuring position coordinate on the plane coordinate system.
Optionally, the determining the position voltage according to the measured position coordinates specifically includes:
the position voltage is a voltage value array formed by a plurality of voltage values measured by the induction electrode array and the voltage values measured by the voltage transformer.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects: the invention provides a detection device and a control method for the output characteristics of a non-contact voltage sensor, wherein the detection device comprises a controller, a data acquisition device, a first actuator, a second actuator and a fixed bracket; the first actuator comprises a first motor and a first screw rod, the second actuator comprises a second motor and a second screw rod, and the first screw rod is vertically connected with the second screw rod; the fixed support comprises a first fixed support and a second fixed support, and the first motor drives the first fixed support to axially move along the first screw rod; the second motor drives the second fixed bracket to axially move along the second screw rod; the second fixed bracket is provided with a hole; the first fixing bracket is used for fixing the cable to be tested to enable the cable to be tested to pass through the hole; the controller is used for controlling the first motor and the second motor to enable the cable to be tested to generate relative displacement in the hole; the data acquisition device comprises a plurality of induction electrodes; a plurality of sensing electrodes disposed around the aperture; the device is used for collecting voltage values of the cable to be tested at different positions of the hole and transmitting the voltage values to the controller. According to the invention, the controller controls the actuator to move, so that the cable to be tested moves in the movable area according to the preset path, meanwhile, the cable to be tested stops at the preset measurement position, the data acquisition device acquires the voltage value at the preset measurement position and transmits the voltage value to the controller, position coordinates are established for the preset measurement position, each preset measurement position corresponds to one position coordinate, so that each position coordinate corresponds to the voltage value acquired by the data acquisition device, synchronous measurement of the conductor position and the measurement voltage at different spatial positions of the conductor to be tested is realized, the output characteristic of the non-contact voltage sensor is obtained, and the design of the non-contact voltage sensor is guided according to the output characteristic of the non-contact voltage sensor.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a block diagram of a detection device actuator and a fixture;
FIG. 2 is a block diagram of a voltage sensor body interface;
FIG. 3 is a flow chart of a method for detecting the output characteristics of a non-contact voltage sensor;
FIG. 4 is a functional block diagram of the detection device;
FIG. 5 is a flow chart of an overall control method;
FIG. 6 is a diagram of a diamond-shaped movement domain of a cable under test;
FIG. 7 is a diagram showing the overall structure of the detection program;
fig. 8 is a flowchart of the overall procedure.
Symbol description:
the device comprises a second motor-1, a second actuator-2, a first actuator-3, a first motor-4, a first fixed support-5, a second fixed support-6, a movable area-7, an induction electrode-8, a first path-17, a second path-18, a third path-19 and a fourth path-20.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a detection device and a control method for the output characteristic of a non-contact voltage sensor, which can determine the corresponding relation between the output characteristic of the non-contact voltage sensor and the spatial position change of a conductor to be detected and obtain the output characteristic of the non-contact voltage sensor.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1, the detection device for the output characteristics of the non-contact voltage sensor comprises a controller, a data acquisition device, a first actuator 3, a second actuator 2 and a fixed bracket.
The first actuator 3 comprises a first motor 4 and a first screw rod, the second actuator 2 comprises a second motor and a second screw rod, and the first screw rod is vertically connected with the second screw rod.
Specifically, the first actuator 3 further includes a first coupling, and the first coupling is connected to the first motor 4 and the first screw rod, respectively. The second actuator 2 further comprises a second coupling, which is connected with the second motor and the second screw rod, respectively.
Further, the first motor 4 is a stepper motor; the second motor 1 is a stepper motor.
The fixed support comprises a first fixed support 5 and a second fixed support 6, and the first motor 4 drives the first fixed support 5 to axially move along the first screw rod; the second motor 1 drives the second fixed bracket to axially move along the second screw rod; the first fixed bracket 5 is provided with a hole; the second fixing support 6 is used for fixing the cable to be tested so that the cable to be tested passes through the hole.
Specifically, the second fixing bracket 6 comprises a cross beam and a suspension arm, and the cross beam is vertically arranged on the second screw rod; the suspension arm is fixed on the cross beam and used for fixing the cable to be tested.
The controller is used for controlling the first motor 4 and the second motor 1 to enable the cable to be tested to generate relative displacement in the hole.
Specifically, the controller sends a motor control command to make the motor rotate forward or backward and drive the first transmission device and the second transmission device to move, so that the first transmission device drives the first fixing support 55 to move and the second transmission device drives the second fixing support 6 to move.
The data acquisition device comprises a plurality of sensing electrodes 8; a plurality of sensing electrodes 8 disposed around the aperture; the device is used for collecting voltage values of the cable to be tested at different positions of the hole and transmitting the voltage values to the controller.
Specifically, the data acquisition device further comprises a fixing piece, wherein holes with regular patterns are formed in a radial plane where the fixing piece is located; the sensing electrodes 8 are uniformly arranged on the fixture around the central axis of the hole and the distance from the sensing electrodes 8 to the edge of the hole is the same.
The data acquisition device also comprises a voltage transformer; the voltage transformer is arranged on the cable to be tested and used for calibrating the voltage value acquired by the induction electrode 8.
The motor is divided into an X-axis motor and a Z-axis motor; the first motor 4 is an X-axis motor; the X-axis motor rotates to realize the horizontal movement of the data acquisition device, the second motor 1 is a Z-axis motor, the Z-axis motor rotates to realize the longitudinal movement of the second fixed support 6, and the data acquisition device longitudinally moves relative to the second fixed support 6 according to the relative movement.
As shown in fig. 2, the number of the sensing electrodes 8 is four, and further, the fixing piece is a PCB board; the fixing piece is connected with the first fixing bracket 5; the fixing piece is arranged in the hole on the first fixing bracket 5; the central axis of the holes of the regular pattern arranged on the radial plane of the fixing element is parallel to the axial direction of the holes on the second fixing support 6. The fixing element moves along with the first actuator 3, and the fixing element moves relative to the second actuator 2, so that the spatial position of the fixing element is changed. The sensing electrode 8 array is formed by uniformly arranging a plurality of electrodes in an array form and is used for measuring cable voltage. The cable movement area is a non-contact measurement area of voltage and is also a movable area 7 of the cable; the cable coordinate locations are randomly distributed within the area.
In the case of actually detecting the cable, the spatial position of the cable in the non-contact voltage measurement area is uncertain, and a change in the spatial position of the cable will cause an error in voltage measurement. Therefore, by setting the path, the motor is controlled to drag the cable to be tested to be arranged at different space coordinate positions, and the output voltage of the data acquisition device at the moment is synchronously acquired, so that the integral output characteristic of the non-contact voltage sensor is acquired.
The controller is respectively connected with the data acquisition device, the first actuator 3 and the second actuator 2; the controller controls the first actuator 3 and the second actuator 2 to enable the cable to be tested to move along a controller preset path in the movable area 7 and stop at a controller preset measuring position; the data acquisition device is used for detecting the voltage value of the cable to be tested at a preset measurement position and transmitting the voltage value to the controller; the controller records a preset measuring position and a voltage value thereof.
Specifically, the controller may adopt a single chip microcomputer, an embedded control chip or a module, etc., and is used for receiving the data signal sent by the data acquisition device and controlling the actuator.
As shown in fig. 3, the method for detecting the output characteristic of the non-contact voltage sensor provided by the invention comprises the following steps:
step 301: a movable region of the cable under test is determined.
Step 302: and determining the moving path of the cable to be tested according to the movable area.
Step 303: determining discrete measurement position coordinates according to the movement path; the method specifically comprises the following steps:
and establishing a plane coordinate system on the plane of the fixing piece, wherein each discrete measuring position on the moving path has a unique corresponding measuring position coordinate on the plane coordinate system.
Step 304: from the measured position coordinates, a position voltage is determined.
Step 305: determining the corresponding relation between the measured position coordinates and the position voltage according to the position voltage; the method specifically comprises the following steps: the position voltage is a voltage value array formed by a plurality of voltage values measured by the induction electrode 8 array and voltage values measured by the voltage transformer; further, when the number of the sensing electrodes 8 is 4, the sensing electrodes 1, 2, 3 and 4 are respectively used, and the voltage value array is a one-dimensional array formed by the measured voltage of the sensing electrode 1, the measured voltage of the sensing electrode 2, the measured voltage of the sensing electrode 3, the measured voltage of the sensing electrode 4 and the measured voltage of the voltage transformer.
Further, the voltage value collected by the voltage transformer is used as one of the data of the position voltage array, and is used as the reference voltage of the measuring voltage of the sensing electrode 1, the measuring voltage of the sensing electrode 2, the measuring voltage of the sensing electrode 3 and the measuring voltage of the sensing electrode 4.
Step 306: and obtaining the output characteristic of the non-contact voltage sensor according to the corresponding relation.
Specifically, as shown in fig. 4, a controller in the detection device for the output characteristic of the non-contact voltage sensor determines a preset path of movement of the cable to be detected according to the shape of the movable area 7 of the cable to be detected, the controller controls the actuator to move according to the preset path, the controller sets a preset measurement position according to the preset path and parameters of the actuator, when the cable to be detected moves to the preset measurement position, the data acquisition device detects a voltage value of the position and transmits the voltage value of the position to the controller, the controller stores the preset measurement position in one-to-one correspondence with the voltage value at the preset measurement position, and after the controller records the voltage value, the controller controls the actuator to enable the cable to be detected to generate relative displacement, so that the cable to be detected reaches the next preset measurement position along the preset path. After the cable to be measured stops moving at the preset measuring position according to the preset path, the data acquisition device acquires the voltage value at the preset measuring position and transmits the voltage value to the control, and then the voltage measurement at the next preset measuring position is continued. The preset path is used for determining the track and the final coordinate of the cable movement, the controller controls the motor to realize the forward and reverse rotation of the motor, and then the first transmission device and the second transmission device are moved through the forward and reverse rotation of the motor, so that the relative movement of the cable to be tested is realized.
As shown in fig. 5, the cable start position, the movement path, and the final stop coordinates are determined by setting the path and the coordinate positions of the movable region 7 of the cable to be tested; based on the path coordinates of the set movable area 7, the motor is controlled to rotate, the cable to be tested reaches a designated position under the mechanical transmission of the transmission mechanism, the cable to be tested generates relative movement in the non-contact voltage measurement area, and the data acquisition device synchronously acquires the cable coordinates and measurement voltage data at the moment when the cable to be tested moves to one position, and after the data acquisition is finished, the next circulating path movement is performed, so that the data acquisition of the space positions and the measurement voltages of various cables is realized in the mode.
The preset path can enable the moving position of the cable to be detected to basically cover each coordinate in the measuring area, and a complete output characteristic curve of the non-contact voltage sensor is obtained. The cable to be tested moves in a specific measurement area which is arranged, and the measurement area can be arranged in different track shapes such as a circle, a square and the like.
Further, as shown in fig. 6, the measurement area is diamond-shaped. The four movement processes of the first path 17, the second path 18, the third path 19 and the fourth path 20 in the diamond-shaped movement domain are recorded as one movement period, the whole path is composed of a route of n periods, and finally the whole movement area is covered by the circulation path, wherein the specific movement modes of the first path 17 to the fourth path 20 in each movement period are as follows:
(1) The first path 17, embodied as a cable, moves from the a point (a, 0) position at the X axis in a 45 deg. counter-clockwise direction from the X axis. The implementation method is to control the motors of the X axis and the Z axis to rotate simultaneously, and the motors on the two axes simultaneously drive the cables to move for a certain distance in the forward directions of the respective axes (namely the forward directions of the X axis and the forward directions of the Z axis), so as to finally implement the first path 17. The control of the moving distance is realized by the encoders, namely, the controller stops when the count value change amounts of the two encoders of the X axis and the Z axis reach a preset value, and records the voltage value and the position coordinate acquired by the data acquisition device (the information acquisition of each path point is also realized by the mode).
(2) After the cable reaches point B (2 a, a), it moves along the second path 18, moving forward 135 ° counter-clockwise along the x-axis. The implementation method is the same as the first path 17 to control the rotation of the two motors, wherein the motor on the X axis realizes that the cable moves a certain distance in the negative direction, and the motor on the Z axis drives the cable to move a certain distance in the positive direction, and the third path 19 is changed after the cable reaches the point C.
(3) The third path 19 is oriented to move 45 counter-clockwise in the negative x-axis direction. The implementation method is to control the X-axis motor and the Z-axis motor simultaneously, and when the cable is moved to a certain distance in the negative direction and reaches the point D, the cable is turned into the fourth path 20.
(4) The fourth path 20 is forward 135 deg. counterclockwise along the x-axis. After reaching the specified target, the first path 17 is continued, and the process is repeated until the boundary position is reached.
Based on the path planning, the cable is moved through the rotation of the motor according to the preset value, and the change of the space position of the cable is realized.
Further, the motor control is specifically as follows:
(1) Motor control mode
The motor adopts a stepping motor, the control mode is pulse control, one pulse motor rotates by 1.8 degrees, and after the pulse motor is subdivided by 32 of the driver, one pulse motor rotates by 0.05625 degrees. For the possible step loss phenomenon after loading, an encoder is used for confirming the rotation angle of the motor, when the motor is started, the value of the encoder is recorded as 0, and then the value of the encoder is increased when the motor rotates forwards, and the value is reduced when the motor rotates reversely.
(2) Motor connection method
The motor is provided with input by a 24V/3A power supply, and A of the stepping motor + 、A - 、B + 、B - The ports are connected with corresponding ports of the driver, and enable ports Ena+, ena-, direction control ports dir+, dir-, pulse input ports Pul and Pul-of the driver are connected with IO ports set on the singlechip.
(3) Control scheme
And setting target coordinates of the cable, and controlling the motor to rotate by the controller according to a difference value of actual coordinates of a target coordinate domain by using a PID algorithm, so that the cable is dragged to move through a mechanical transmission device, and finally, the designated target is reached.
As shown in fig. 7, the detection device of the output characteristic of the non-contact voltage sensor further comprises an upper computer, and the detection method of the detection device of the output characteristic of the non-contact voltage sensor comprises an upper computer unit and a control unit, wherein the control unit comprises a motor control unit, an encoder reading unit and a data acquisition unit; the upper computer is a computer which directly sends out control commands and provides functions of user interaction, data storage, analysis and the like. The encoder reading unit determines a cable moving distance and coordinates by reading a motor rotation angle; the data acquisition unit is used for corresponding the acquired cable basic voltage signals to the cable position coordinates one by one and recording the voltage values to the corresponding position coordinates.
The specific working process of the acquisition unit in the control method of the detection device for the output characteristics of the non-contact voltage sensor provided by the embodiment is as follows.
As shown in fig. 8, the controller is an STM32 single-chip microcomputer; the array of sense electrodes 8 comprises 4 sense electrodes 8; firstly, after an acquisition circuit is electrified, the induction electrodes 8 and the voltage transformers are connected with respective induction signals into an operational amplifier, the analog-digital converter (ADC) in the singlechip is used for sampling the amplified signals, wherein the sampling is performed in a scanning mode of the ADC, the switching time of each channel is very short, the sampling of five channels of ADC can be considered to be performed simultaneously, four induction electrodes 8 are provided with four channels of signals, and the voltage transformer is provided with one channel of signals; secondly, under the condition that the cable is not electrified, firstly measuring the value of each path of ADC, marking the value as a zero point, and summing up n+1 paths of ADC values; thirdly, after zero point measurement is finished, the cable is electrified, the zero point value is subtracted from the data measured at the moment to obtain difference data, 200 times of difference data are acquired at each measurement position to obtain 200 difference data, root mean square operation is carried out on the 200 difference data, the calculated data are the effective data of each electrode at each measurement position and the voltage transformer at each measurement position, and the five effective data are combined into a one-dimensional array to obtain position voltage; and finally, combining the calculated effective data into a data string according to the Modbus protocol, and uploading the data string to the control unit through the data transmitting unit.
The specific implementation steps are as follows:
step 201: the procedure starts.
Step 202: the n+1-way ADC is started.
Step 203: the measured power-on n+1 data is recorded as zero point.
Step 204: n+1 ADC data were recorded (set to record every 0.1 ms).
Step 205: and carrying out corresponding root mean square calculation on 200 data recorded every time to obtain effective data.
Step 206: the data are combined into a data string according to the Modbus protocol.
Step 207: and sending the data to the processing unit. Specifically, step 204 is continued after the data is transmitted.
The specific working process of the control unit of the detection device and the control method for the output characteristic of the non-contact voltage sensor provided by the embodiment is as follows.
Step 101: the procedure starts.
Step 102: and starting the serial port to receive the instruction of the upper computer.
Step 103: judging whether a test start instruction is accepted or not; if not, return to step 102.
Step 104: if yes, setting the target coordinates of the cable to be tested.
Step 105: setting the rotating speed and the rotating direction of the motor by a PID algorithm; specifically, a proper pulse frequency is calculated by using the result of PID algorithm calculation, and the motor motion is controlled.
Step 106: a motor moves the cable; specifically, whether the motor rotates positively or reversely is determined according to the positive and negative values of the result calculated by the PID algorithm, the motor is started, and the lead screw is driven by the coupler to control the cable to be tested to the appointed coordinate.
Step 107: judging whether the position is designated; specifically, the current coordinate is calculated through the rotation angle of the motor, and compared with the appointed coordinate, whether the coordinates are consistent is judged; if yes, the motor is turned off; if not, return to step 105.
Step 108: receiving data sent by the acquisition circuit according to a Modbus protocol; specifically, after the cable reaches the designated coordinates, receiving information from the acquisition unit; further, the data comes from step 207.
Step 109: after data processing, the data is sent to an upper computer for recording; specifically, voltage data measured by a data acquisition device for synchronously recording the current measured position coordinates and position coordinate data of the cable are synchronously recorded, and the data are transmitted to an upper computer for recording after being processed. The upper computer stores the received data of the position coordinates and the voltage data.
Step 110: judging whether the cable reaches the boundary or not; if not, returning to the step 104; specifically, the driving motor moves to change the target coordinates of the cable to be tested, and moves to the next point according to the path.
Step 111: and (5) exiting the test, and ending the program.
Specifically, the upper computer stores the received data of all the position coordinates in the movable area 7 and the voltage data measured by the position coordinates, so as to obtain the output characteristic of the non-contact voltage sensor; the data of the output characteristics of the non-contact voltage sensor stored by the upper computer can be used for guiding the design of the non-contact voltage sensor.
According to the invention, the controller controls the actuator to move, so that the cable to be tested moves in the movable area according to the preset path, meanwhile, the cable to be tested stops at the preset measurement position, the data acquisition device acquires the voltage value at the preset measurement position and transmits the voltage value to the controller, position coordinates are established for the preset measurement position, each preset measurement position corresponds to one position coordinate, so that each position coordinate corresponds to the voltage value acquired by the data acquisition device, synchronous measurement of the conductor position and the measurement voltage at different spatial positions of the conductor to be tested is realized, the output characteristic of the non-contact voltage sensor is obtained, and the design of the non-contact voltage sensor is guided according to the output characteristic of the non-contact voltage sensor.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present invention and the core ideas thereof; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (8)
1. The detection device for the output characteristics of the non-contact voltage sensor is characterized by comprising a controller, a data acquisition device, a first actuator, a second actuator and a fixed bracket;
the first actuator comprises a first motor and a first screw rod, the second actuator comprises a second motor and a second screw rod, and the first screw rod is vertically connected with the second screw rod;
the fixed support comprises a first fixed support and a second fixed support, and the first motor drives the first fixed support to axially move along the first screw rod; the second motor drives the second fixing bracket to axially move along the second screw rod;
the first fixing bracket is provided with a hole; the second fixing bracket is used for fixing the cable to be tested so that the cable to be tested passes through the hole;
the controller is used for controlling the first motor and the second motor to enable the cable to be tested to generate relative displacement in the hole;
the data acquisition device comprises a plurality of induction electrodes; the plurality of sensing electrodes disposed around the aperture; the device is used for collecting voltage values of the cable to be tested at different positions of the hole and transmitting the voltage values to the controller.
2. The apparatus for detecting output characteristics of a non-contact voltage sensor according to claim 1, wherein the first actuator further comprises a first coupling connected to the first motor and the first screw, respectively; the second actuator further comprises a second coupler, and the second coupler is respectively connected with the second motor and the second screw rod.
3. The device for detecting the output characteristics of the non-contact voltage sensor according to claim 2, wherein the data acquisition device further comprises a voltage transformer; the voltage transformer is arranged on the cable to be tested and used for calibrating the voltage value acquired by the induction electrode.
4. The device for detecting the output characteristics of the non-contact voltage sensor according to claim 3, wherein the data acquisition device further comprises a fixing member, and holes with regular shapes are formed in a radial plane where the fixing member is located; the sensing electrodes are uniformly arranged on the fixing piece around the central axis of the hole, and the distances from the sensing electrodes to the edge of the hole are the same.
5. The device for detecting the output characteristics of the non-contact voltage sensor according to claim 4, wherein the second fixing bracket comprises a cross beam and a suspension arm, and the cross beam is vertically arranged on the second screw rod; and the suspension arm is fixed on the cross beam and used for fixing the cable to be tested.
6. A control method of a detection device of an output characteristic of a noncontact voltage sensor, characterized by comprising, based on the detection device of an output characteristic of a noncontact voltage sensor as claimed in claim 5:
determining a movable area of the cable to be tested;
determining a moving path of the cable to be tested according to the movable area;
determining discrete measurement position coordinates according to the movement path;
determining a position voltage according to the measured position coordinates;
determining the corresponding relation between the measured position coordinates and the position voltage according to the position voltage;
and obtaining the output characteristic of the non-contact voltage sensor according to the corresponding relation.
7. The method for controlling the non-contact voltage sensor output characteristic detection device according to claim 6, wherein determining discrete measurement position coordinates according to the movement path, specifically comprises:
and establishing a plane coordinate system on the plane of the fixing piece, wherein each discrete measuring position on the moving path has a unique corresponding measuring position coordinate on the plane coordinate system.
8. The control method of the detection device for the output characteristics of the non-contact voltage sensor according to claim 6, wherein the determining the position voltage according to the measured position coordinates specifically includes:
and the position voltage is a voltage effective value at the measured position coordinate obtained by performing root mean square operation on a plurality of voltage values measured by the plurality of induction electrodes and the voltage value measured by the voltage transformer.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104280680A (en) * | 2014-08-26 | 2015-01-14 | 温州大学 | Non-contact type device and method for measuring breaking characteristics of breaker |
| CN104730312A (en) * | 2013-12-20 | 2015-06-24 | 财团法人工业技术研究院 | Non-contact current sensor mounting position change compensation device |
| EP2929359A1 (en) * | 2012-12-05 | 2015-10-14 | Schneider Electric USA, Inc. | Isolated and self-calibrating voltage measurement sensor |
| CN108072789A (en) * | 2016-11-11 | 2018-05-25 | 弗兰克公司 | Contactless Electric Power Measurement System |
| CN109032070A (en) * | 2018-07-19 | 2018-12-18 | 西南交通大学 | A kind of contactless R-test measuring instrument scaling method using eddy current displacement sensor |
| CN110470898A (en) * | 2018-05-09 | 2019-11-19 | 弗兰克公司 | The related contactless voltage and current measurement in position |
| CN113219240A (en) * | 2021-05-28 | 2021-08-06 | 北京中科飞龙传感技术有限责任公司 | Non-invasive cable voltage measurement sensor |
| CN113311214A (en) * | 2021-05-21 | 2021-08-27 | 山东中实易通集团有限公司 | Non-contact alternating current-direct current suspension conductor potential measurement system and method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9063184B2 (en) * | 2011-02-09 | 2015-06-23 | International Business Machines Corporation | Non-contact current-sensing and voltage-sensing clamp |
| US8508212B2 (en) * | 2011-06-14 | 2013-08-13 | International Business Machines Corporation | Calibration of non-contact current sensors |
-
2021
- 2021-09-23 CN CN202111110971.8A patent/CN113687288B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2929359A1 (en) * | 2012-12-05 | 2015-10-14 | Schneider Electric USA, Inc. | Isolated and self-calibrating voltage measurement sensor |
| CN104730312A (en) * | 2013-12-20 | 2015-06-24 | 财团法人工业技术研究院 | Non-contact current sensor mounting position change compensation device |
| CN104280680A (en) * | 2014-08-26 | 2015-01-14 | 温州大学 | Non-contact type device and method for measuring breaking characteristics of breaker |
| CN108072789A (en) * | 2016-11-11 | 2018-05-25 | 弗兰克公司 | Contactless Electric Power Measurement System |
| CN110470898A (en) * | 2018-05-09 | 2019-11-19 | 弗兰克公司 | The related contactless voltage and current measurement in position |
| CN109032070A (en) * | 2018-07-19 | 2018-12-18 | 西南交通大学 | A kind of contactless R-test measuring instrument scaling method using eddy current displacement sensor |
| CN113311214A (en) * | 2021-05-21 | 2021-08-27 | 山东中实易通集团有限公司 | Non-contact alternating current-direct current suspension conductor potential measurement system and method |
| CN113219240A (en) * | 2021-05-28 | 2021-08-06 | 北京中科飞龙传感技术有限责任公司 | Non-invasive cable voltage measurement sensor |
Non-Patent Citations (1)
| Title |
|---|
| 廖芳.基于电场感应的非接触式电压传感器分布电容特性的研究.基于电场感应的非接触式电压传感器分布电容特性的研究.2020,I140-502. * |
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Application publication date: 20211123 Assignee: Shanghai Red Sandalwood Intelligent Technology Co.,Ltd. Assignor: Yueqing Institute of industry, Wenzhou University Contract record no.: X2024980014751 Denomination of invention: A non-contact voltage sensor output characteristic detection device and control method Granted publication date: 20230926 License type: Common License Record date: 20240912 |