CN106744112B - Detection circuit and detection method for short circuit of elevator door lock loop - Google Patents
Detection circuit and detection method for short circuit of elevator door lock loop Download PDFInfo
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- CN106744112B CN106744112B CN201611226380.6A CN201611226380A CN106744112B CN 106744112 B CN106744112 B CN 106744112B CN 201611226380 A CN201611226380 A CN 201611226380A CN 106744112 B CN106744112 B CN 106744112B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0043—Devices enhancing safety during maintenance
- B66B5/005—Safety of maintenance personnel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
- B66B13/02—Door or gate operation
- B66B13/14—Control systems or devices
- B66B13/143—Control systems or devices electrical
- B66B13/146—Control systems or devices electrical method or algorithm for controlling doors
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- Automation & Control Theory (AREA)
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- Indicating And Signalling Devices For Elevators (AREA)
Abstract
The invention provides a circuit and a method for detecting short circuit of an elevator door lock loop, wherein a plurality of layers of door lock safety contacts are connected in series, a first end of each door lock safety contact is connected with a voltage to form a first node, a second end of each door lock safety contact is connected with a car door lock safety contact to form a second node, and the other end of each car door lock safety contact forms a third node. The invention can detect the short circuit condition of the main door lock loop, the floor door lock and the car door lock, and carry out fault processing to control the elevator to stop running when the short circuit occurs, thereby avoiding the dangerous condition.
Description
Technical Field
The invention relates to elevator safety detection, in particular to door lock short circuit detection.
Background
Door lock short circuit detection is always the key problem of elevator safety work consideration. When the elevator is maintained, the short circuit of the door lock loop is inevitable, but after the elevator is maintained, a maintenance worker forgets to remove the short circuit wire and does not recover the normal wiring state of the door lock loop. The action states of the electric safety devices at the closing positions of the car doors and the locking positions of the layer door lock locking devices cannot be monitored by the conventional technology, and if the elevator normally runs under the condition of short circuit of the door locks, a large number of casualty accidents such as people clamping, shearing, falling and the like can be caused.
Therefore, a method and a circuit for detecting the short circuit of the elevator door lock loop, which can solve the above problems, are urgently needed.
Disclosure of Invention
The invention aims to provide a detection circuit and a detection method for a short circuit of an elevator door lock loop, which can detect the short circuit of a landing door lock and a car door lock, alarm in time and control the elevator to stop running after the short circuit is detected, and can effectively avoid the elevator from normally walking under the condition of the short circuit of the door locks, thereby avoiding the occurrence of dangerous conditions.
In order to achieve the purpose, the invention provides a short circuit detection circuit of an elevator door lock loop, the elevator door lock loop comprises a layer door lock and a contact switch of a car door lock, wherein a plurality of layers of door lock safety contacts are connected in series, a first end of each layer of door lock safety contact is connected with a voltage to form a first node, a second end of each layer of door lock safety contact is connected with a first end of the car door lock safety contact to form a second node, a second end of each car door lock safety contact forms a third node, the elevator door lock short circuit detection circuit comprises a safety detection module and a control circuit, the safety detection module detects whether the elevator reaches a destination floor flat position and the elevator door is opened in place, if so, a voltage signal of the third node is detected, if not, a voltage signal of the second node is detected, and if so, a voltage signal of the second node is detected, a short circuit signal is output, if not, judging whether the elevator is positioned at the position of a door zone, if so, communicating the first node with the third node, detecting a voltage signal of a second node, and if so, outputting a short-circuit signal; and the control circuit carries out fault processing according to the short-circuit signal.
Compared with the prior art, the elevator door lock short circuit detection method has the advantages that when the elevator reaches the target floor leveling position and the elevator door is opened in place each time, the door lock short circuit detection is carried out, namely whether the door lock loop is short-circuited or not is detected when the elevator arrives at the station and opens in place each time, if the door lock loop is short-circuited, relevant fault processing is carried out, the elevator cannot operate again, normal elevator walking under the condition of short circuit of the door lock can be effectively avoided, and further the dangerous condition is avoided. In addition, the invention also detects whether the elevator is in the position of a target floor door zone after detecting the short circuit of the main door lock loop (detecting the voltage signal of the third node) and the short circuit of the landing door lock (detecting the voltage signal of the second node for the first time), if so, the first node and the third node are communicated together, and the voltage signal of the second node is detected again, thereby independently detecting whether the car door lock is in the short circuit, detecting the situations that the main door lock loop is completely in the short circuit, the landing door lock is in the short circuit and the car door lock is in the short circuit at one time, and adopting corresponding fault processing when in the short circuit, thereby further avoiding the danger.
The safety detection module comprises a safety circuit and a detection circuit, the safety circuit outputs a first control signal when the elevator arrives and is positioned at a target floor door zone, and controls the first node and the third node to be communicated according to a second control signal; the detection circuit is connected with the safety circuit and receives a first control signal of the safety circuit, when the elevator reaches a destination floor flat position and the elevator door is opened in place, a voltage signal of a third node is detected, if the third node has the voltage signal, a short-circuit signal is output, if the third node has the voltage signal, the voltage signal of a second node is detected, if the second node has the voltage signal, the short-circuit signal is output, if the third node does not have the voltage signal, whether the first control signal is received or not is detected, if the third node has the voltage signal, the elevator is positioned in the door position and the second control signal is generated, the voltage signal of the second node is detected after the second control signal is generated, and if the second node has the voltage signal, the short-circuit signal is output.
Specifically, a main control board of the detection circuit is provided with a door area signal input point, a door lock loop detection point, a door lock short circuit detection point, two leveling signal input points and a door opening in-place detection point, wherein the door area signal input point is connected with an output end of the first control signal on the safety circuit, the door lock loop detection point is connected with the third node, the door lock short circuit detection point is connected with the second node, the two leveling signal input points are respectively connected with a voltage signal through an upper leveling switch YP3 and a lower leveling switch YP4, so that the upper leveling switch YP3 and the lower leveling switch YP4 are conducted when the elevator reaches a target floor leveling position to provide a voltage signal for the detection circuit, and the detection circuit judges whether the elevator reaches the target floor leveling position according to the voltage signal; the door opening in-place detection point is connected with a door opening in-place signal output by the door opening in-place detection circuit, the door opening in-place detection circuit outputs a door opening in-place signal when the elevator is in place, and the detection circuit judges whether the elevator is in place or not according to the door opening in-place signal.
Specifically, the safety circuit is connected to a power signal and ground through a door zone switch YP1 and a door zone switch YP2 of the elevator, respectively, the door zone switch YP1 and the door zone switch YP2 are turned on when the elevator reaches a destination floor door zone position to supply power to the safety circuit, and the safety circuit outputs a first control signal when power is obtained.
More specifically, the safety circuit includes a first power-on loop, a second power-on loop, a first control portion and a second control portion, wherein one end of the first power-on loop is connected to a preset high level or a preset low level, the other end of the first power-on loop is connected to the detection circuit, one end of the second power-on loop is connected to the first node, the other end of the second power-on loop is connected to the third node, the first control portion is connected to the power signal and controls the first power-on loop to be conducted according to the power signal so as to output a first control signal, and the second control portion is connected to the second control signal and controls the second power-on loop to be conducted according to the second control signal so as to communicate the first node and the third node.
More specifically, the safety circuit comprises a first relay K1 and a second relay K2, wherein a first end of a coil of the relay K2 is connected with the power signal, a second end of the coil of the relay K1 is connected with the second control signal, a first end of a coil of the relay K1 is grounded, a second end of the coil of the relay K1 is connected with a first end of a first normally open switch of a relay K1, and a second end of the first normally open switch of the relay K1 outputs the first control signal; and a second normally-open switch of the relay K1 and a normally-open switch of the relay K2 are connected in series and then are connected between the first node and a third node, and the second control signal is a ground signal.
The invention also discloses a method for detecting the short circuit of the elevator door lock loop, the elevator door lock loop comprises a layer door lock and a contact switch of the elevator door lock, wherein the elevator door lock safety contact and a plurality of layers of door lock safety contacts are connected in series and are connected with a voltage in parallel, the first end of the plurality of layers of door lock safety contacts connected in series is connected with a voltage and forms a first node, the second end of the plurality of layers of door lock safety contacts is connected with the first end of the elevator door lock safety contact and forms a second node, and the second end of the elevator door lock safety contact forms a third node, which is characterized in that: the elevator door lock loop short circuit detection method comprises the following steps: detecting whether the elevator reaches a target floor leveling position and whether the elevator door is opened in place, if so, detecting a voltage signal of the third node, if so, outputting a short-circuit signal and carrying out fault processing, if not, detecting a voltage signal of the second node, if so, outputting a short-circuit signal and carrying out fault processing, otherwise, judging whether the elevator is positioned at the door position, if so, communicating the first node with the third node, detecting a voltage signal of the second node, and if so, outputting a short-circuit signal and carrying out fault processing.
Compared with the prior art, the door lock short circuit detection is carried out when the elevator reaches the target floor leveling position and the elevator door is opened in place each time, namely, whether the door lock loop is short-circuited or not is detected when the elevator arrives at a station and opens in place each time, if the door lock loop is short-circuited, relevant fault processing is carried out, the elevator cannot run again, normal elevator walking under the condition of door lock short circuit can be effectively avoided, and further the dangerous condition is avoided. In addition, the invention also detects whether the elevator is in the position of a destination floor door area after detecting the short circuit of the main door lock loop (detecting the voltage signal of the third node) and the short circuit of the landing door lock (detecting the voltage signal of the second node for the first time), if so, the first node and the third node are communicated together, and the voltage signal of the second node is detected again, thereby independently detecting whether the car door lock is in the short circuit, and the situations that the main door lock loop is completely in the short circuit, the landing door lock is in the short circuit and the car door lock is in the short circuit can be detected once, and corresponding fault treatment is adopted during the short circuit, thereby further avoiding the occurrence of danger.
Preferably, the step of detecting whether the elevator reaches the destination floor leveling position and whether the elevator door is opened in place comprises: setting two leveling signal input points, respectively connecting the two leveling signal input points with power supply voltages through an upper leveling switch YP3 and a lower leveling switch YP4 so that the upper leveling switch YP3 and the lower leveling switch YP4 are conducted to provide voltage signals when the elevator reaches a target floor leveling position, and detecting whether the two leveling signal input points receive the voltage signals to judge whether the elevator reaches the target floor leveling position; and arranging a door opening in-place detection point, connecting the door opening in-place detection point with a door opening in-place detection circuit, outputting a door opening in-place signal by the door opening in-place detection circuit when the elevator is opened in place, and judging whether the elevator is opened in place or not according to the door opening in-place signal by the detection.
Specifically, the step of communicating the first node with the third node includes: when the elevator is positioned at the position of the door zone, a second control signal is output to a safety circuit, and the safety circuit controls the first node and the third node to be communicated according to the second control signal.
Preferably, the step of determining whether the elevator is located at a door zone location comprises: and a safety circuit is arranged, power ends of the safety circuit are respectively connected with a power signal and the ground through a door area switch YP1 and a door area switch YP2 of the elevator, a first control signal is output when the door area switch YP1 and the door area switch YP2 are closed, whether the first control signal is received or not is detected, and if yes, the elevator is judged to be positioned at the position of the door area.
Specifically, the safety circuit includes a first current-carrying loop, a second current-carrying loop, a first control portion and a second control portion, one end of the first current-carrying loop is connected to a high level or a low level, the other end of the first current-carrying loop outputs a first control signal, one end of the second current-carrying loop is connected to the first node, the other end of the second current-carrying loop is connected to the third node, the first control portion is connected to the power signal and controls the first current-carrying loop to be conducted according to the power signal so as to output the first control signal, and the second control portion is connected to the second control signal and controls the second current-carrying loop to be conducted according to the second control signal so as to communicate the first node and the third node.
More specifically, the safety circuit comprises a first relay K1 and a second relay K2, wherein a first end of a coil of the relay K2 is connected with the power signal, a second end of the coil of the relay K1 is connected with the second control signal, a first end of a coil of the relay K1 is grounded, a second end of the coil of the relay K1 is connected with a first end of a first normally open switch of a relay K1, and a second end of the first normally open switch of the relay K1 outputs the first control signal; and a second normally-open switch of the relay K1 and a normally-open switch of the relay K2 are connected in series and then are connected between the first node and a third node, and the second control signal is a ground signal.
More specifically, a one-way diode D2 is connected between the first end and the second end of the coil of the relay K2 in the reverse direction, and a one-way diode D1 is connected between the first end and the second end of the coil of the relay K1 in the forward direction.
Drawings
Fig. 1 is a structural block diagram of a short circuit detection circuit of an elevator door lock loop.
Fig. 2 is a circuit diagram of a detection circuit for the short circuit of the elevator door lock loop.
Fig. 3 is a flow chart of the method for detecting the short circuit of the elevator door lock loop.
Detailed Description
In order to explain technical contents, structural features, and objects and effects of the present invention in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
Referring to fig. 1, the present invention provides a short circuit detection circuit 100 for an elevator door lock loop, wherein the elevator door lock loop 10 includes a contact switch 1KM-nKM for a landing door lock and a contact switch UK1 for a car door lock, wherein a landing door lock safety contact 1KM-nKM and a car door lock safety contact UK1 are connected in series and connected with a voltage U, a first end of the plurality of landing door lock safety contacts 1KM-nKM connected in series is connected with a voltage U and forms a first node 1, a second end of the plurality of landing door lock safety contacts 1KM-nKM connected in series is connected with a first end of a car door lock safety contact UK1 and forms a second node 2, a second end of the car door lock safety contact UK1 forms a third node 3, the elevator door lock short circuit detection circuit 100 includes a safety detection module 200 and a control circuit 40, the safety detection module 200 detects a voltage signal of the third node if the elevator reaches a destination floor level position and an elevator door is open in place, if the third node has a voltage signal, outputting a short-circuit signal (judging that a total door lock loop is in a short circuit state at the moment), if not, detecting the voltage signal of the second node, if the second node has a voltage signal, outputting a short-circuit signal (judging that the landing door lock is in a short circuit state at the moment), if not, judging whether the elevator is positioned at the position of the door zone, if so, communicating the first node 1 with the third node 3, detecting the voltage signal of the second node 2, and if the second node 2 has a voltage signal, outputting a short-circuit signal (judging that the car door lock is in a short circuit state at the moment); the control circuit 30 performs fault processing according to the short-circuit signal.
Referring to fig. 3, the detection method for detecting the short circuit of the elevator door lock loop of the invention is described: (11a) detecting whether the elevator reaches a destination floor leveling position; if yes, (11 b) detecting whether the elevator door is opened in place, if yes, (12) detecting a voltage signal of the third node 3, if the voltage signal of the third node 3 exists (for example, detecting that the voltage signal U3 of the third node 3 is greater than 0), (13) outputting a short-circuit signal, and (14) carrying out fault processing according to the short-circuit signal, and at the moment, judging that the main door lock loop is short-circuited. If not (15) detecting the voltage signal of the second node 2, if the voltage signal exists at the second node 2 (for example, detecting that the voltage signal U2 of the second node 2 is greater than 0), then (13) outputting a short-circuit signal and (14) carrying out fault processing according to the short-circuit signal, and then judging that the fault door lock is short-circuited. If not, (16) judging whether the elevator is located at the position of the door zone, if so, (17) communicating the first node 1 with the second node 3, and (18) detecting a voltage signal of the second node 2, if the voltage signal of the second node 2 (for example, detecting that the voltage signal U2 of the second node 2 is greater than 0), then, (13) outputting a short-circuit signal, and (14) carrying out fault processing according to the short-circuit signal, and at the moment, judging that the car door lock is in short circuit. If not (19), judging that the door lock loop is not short-circuited. And the fault processing comprises the steps of sending an alarm according to the short-circuit signal and controlling the elevator to stop running.
Referring to fig. 1, the safety detection module 200 includes a safety circuit 20 and a detection circuit 30, the safety circuit 20 outputs a first control signal S1 when the elevator arrives at and is at a destination floor door zone position, and controls the first node 1 and the third node 3 to be communicated according to a second control signal S2; the detection circuit 30 is connected to the safety circuit 20 and receives the first control signal S1 of the safety circuit 20, detects a voltage signal of a third node 3 when the elevator reaches a destination floor leveling position, outputs a short-circuit signal if the third node 3 has a voltage signal, detects a voltage signal of the second node 2 if the third node 3 does not have a voltage signal, outputs a short-circuit signal if the second node 2 has a voltage signal, detects whether the first control signal S1 is received if the third node 3 does not have a voltage signal, determines that the elevator is located at a door position and generates the second control signal S2 if the third node 3 has a voltage signal, detects a voltage signal of the second node 2 after the second control signal S2 is generated, and outputs a short-circuit signal if the second node 2 has a voltage signal.
Referring to fig. 2, the detection circuit 30 is disposed on a main control board, the main control board is provided with a door area signal input point X4, a door lock loop detection point X1, a door lock short circuit detection point X2, a safety loop monitoring point X3, two flat layer signal input points X5, X6, and a door opening in-place detection point X7, the gate area signal input point X4 is connected to the output terminal d of the first control signal S1 on the safety circuit 20, the door lock loop detection point X1 is connected with the third node 3, the door lock short circuit detection point X2 is connected with the second node 2, the two flat layer signal input points X5 and X6 are respectively connected with a voltage signal of 24V through an upper flat layer switch YP3 and a lower flat layer switch YP4, so that the upper level switch YP3 and the lower level switch YP4 are conductive when the elevator reaches the destination floor level position to supply a voltage signal to the detection circuit 30, and the detection circuit judges whether the elevator reaches the destination floor leveling position according to the voltage signal. The door opening in-place detection point X7 is connected to a door opening in-place signal S3 outputted from a door opening in-place detection circuit (not shown), which detects the state of the elevator door and outputs a door opening in-place signal S3 after the elevator door is opened in place, and the main control board is the main control board of the elevator.
Referring to fig. 2, the safety circuit 20 is switched to a power signal and ground through a door zone switch YP1 and a door zone switch YP2 of the elevator, respectively, the door zone switch YP1 and the door zone switch YP2 are turned on when the elevator reaches a destination floor door zone position to supply power to the safety circuit 20, the safety circuit 20 outputs a first control signal S1 when power is obtained, and the safety circuit 20 is de-energized to stop outputting the first control signal S1 when the door zone switch YP1 and the door zone switch YP2 are turned off. The door zone switches YP1, YP2 are detection devices that detect whether or not the elevator is at the corresponding door zone position, and may be replaced with other detection devices.
Referring to fig. 2, the safety circuit 20 includes a first current-carrying loop c-f-g-d, a second current-carrying loop ab, a first control portion c-f-g and a second control portion c-f-e, the first current-carrying loop c-f-g-d is connected to a preset high level (power signal) at one end and the detection circuit 30 at the other end, the second current-carrying loop ab is connected to the first node 1 at one end and the third node 3 at the other end, the first control portion c-f-g is connected to the power signal (24V voltage) and controls the first current-carrying loop c-f-g-d to be conducted according to the power signal to output a first control signal S1, and the second control portion c-f-e is connected to the second control signal S2 and controls the second current-carrying loop ab to be conducted according to the second control signal S2 to communicate with the first node 1 And a third junction 3. In this embodiment, the first energization loop ab is turned on at a high level, but of course, the energization loop may be turned on at a low level, and when the detection circuit 30 detects the low level, it is determined that the elevator is at the destination floor door zone position. The safety circuit 20 is essentially a switch circuit, the power-on circuit is an on-off switch of the switch circuit, the control unit is a control part of the switch circuit, and the control unit is actually a circuit connected with a certain control signal.
Referring to fig. 2, the safety circuit 20 includes a first relay K1, a second relay K2, a first terminal of a coil of the relay K2 is connected to the power signal, a second terminal of the coil of the relay K1 is connected to the second control signal, a first terminal of a coil of the relay K1 is connected to ground, a second terminal of the coil of the relay K1 is connected to a first terminal of a first normally open switch, and a second terminal of the first normally open switch of the relay K1 outputs the first control signal; the second normally open switch of the relay K1 and the normally open switch of the relay K2 are connected in series and then connected between the first node 1 and the third node 3, the first control signal S1 is a high level signal, and the second control signal S2 is a ground signal. And a one-way diode D2 is also connected between the first end and the second end of the coil of the relay K2 in a reverse direction, and a one-way diode D1 is also connected between the first end and the second end of the coil of the relay K1 in a forward direction.
With reference to fig. 2, a specific working principle of the present invention is described: (1) when the elevator reaches the destination floor leveling position, the upper leveling switch YP3 and the lower leveling switch YP4 supply leveling signals to the upper leveling signal input point X5 and the lower leveling signal X6 of the detection circuit 30, respectively. When the elevator is opened after the leveling signal is input, the door opening in-place detection circuit outputs a door opening in-place signal after the elevator is opened in place, the door opening in-place detection point X7 receives the door opening in-place signal, and the detection circuit 30 detects a door lock loop detection point X1. If a voltage signal exists at a detection point X1 of the door lock loop, the main door lock loop is judged to be in short circuit, the control circuit 40 of the main control board reports a fault and carries out fault processing, and the elevator cannot be started again to normally run before the fault is removed; if no voltage signal is detected at the door lock loop detection point X1, the main door lock loop is determined not to be short-circuited.
(2) After detecting that no voltage signal exists at a door lock loop detection point X1, a detection circuit 30 of the main control board detects that a door lock short-circuit detection point X2 of the main control board has a voltage signal, and at the moment, a first node 1 and a third node 3 have no access.
a. Under the normal condition (floor door lock is not short circuited), when the elevator opens the destination floor door and the car door and the door is opened in place, no path exists between the node 1 and the node 2 at the moment, no voltage signal exists in the node 2, and therefore no voltage signal exists in the door lock short circuit detection point X2.
b. If the layer-by-layer door lock is shorted or a plurality of layer-by-layer door locks including the layer are shorted, a path is formed between the first node 1 and the second node 2 through the first node 1 → 1KM → 2KM → … … → nKM → the second node 2, and the second node 2 has a voltage signal, so that the door lock short-circuit detection point X2 has a voltage signal.
Therefore, whether the fault door lock is short-circuited can be judged by judging whether the voltage signal exists at the door lock short-circuit detection point X2: if the voltage signal of X2 is detected, it is judged that the landing door lock is short-circuited, the detection circuit 30 of the main control board outputs a short-circuit signal to report a fault, and the control circuit 40 controls the elevator to be incapable of starting normal operation again before the fault is not relieved; if no voltage signal is detected at the door lock short-circuit detection point X2, the floor door lock is judged not to be short-circuited.
(3) After detecting that no voltage signal exists at the door lock short circuit detection point X2, the detection circuit 30 of the main control board detects whether a signal is input at the door area signal input point X4. X4 has a signal, judges that the elevator is at the position corresponding to the door area, at the moment, the door area switches YP 1-YP 2 have signals input to the safety circuit board terminals 24V and COM, provide 24V voltage to the coil of the relay K1, pull in the normally open contact of the relay K1, at the moment, the normally open contact (the normally open contact K1 contact pull in) → d → the door area signal input point X4 is conducted (loop cfgd) through 24V → the door area switch YP1 → the relay K1, and the door area signal input point X4 has 24V voltage input. After a signal is input at the gate area signal input point X4, an output is output at the output point Y0, the detection circuit 30 controls contact attraction between M0 and Y0 to form a loop 24V → a gate area switch YP1 → c → a relay K2 coil → e → Y0 → M0 → 0V, the relay K2 coil is electrified, the normally open contact K2 of the relay K2 attracts, a path is formed between the first node 1 and the third node 3 through the first node 1 → the normally open contact K1 (attracting at this time) → the normally open contact K2 (attracting at this time) → the third node 3, and the third node 3 has a voltage signal at this time.
a. Under the normal condition (the car door lock is not short-circuited), when the elevator opens the destination floor door and the car door and the door is in place, no path exists between the first node 1 and the second node 2, and no voltage signal exists between the third node 3 and the second node 2, so that no voltage signal exists at the door lock short-circuit detection point X2.
b. If the car door lock is in short circuit, a path is formed between the third node 3 and the second node 2 through the second node 2 → UK1 → the third node 3, and the second node 2 has a voltage signal, so that the door lock short circuit detection point X2 has a voltage signal.
Therefore, whether the car door lock is in short circuit can be judged by judging whether a voltage signal exists at the door lock short circuit detection point X2: if the voltage signal of the X2 is detected, the car door lock is judged to be in short circuit, the main control board reports the fault, and the elevator cannot be started again to normally run before the fault is relieved; if no voltage signal is detected in X2, it is determined that neither the floor nor the car door lock is short-circuited.
The above disclosure is only for the preferred embodiment of the present invention, and it should be understood that the present invention is not limited thereto, and the invention is not limited to the above disclosure.
Claims (12)
1. The utility model provides a detection circuitry of elevator door lock return circuit short circuit, the lock return circuit of elevator include the contact switch of layer lock and sedan-chair lock, wherein, a plurality of layers lock safety contact concatenate and make its first termination voltage and form first node, and the second termination sedan-chair lock safety contact's first end forms the second node, sedan-chair lock safety contact's second end forms third node, its characterized in that: elevator lock short circuit detection circuitry includes:
the safety detection module is used for detecting whether the elevator reaches a destination floor flat position and whether an elevator door is opened in place, detecting a voltage signal of the third node if the elevator door is opened in place, outputting a short-circuit signal if the elevator door is opened in place, detecting a voltage signal of the second node if the elevator door is opened in place, outputting a short-circuit signal if the elevator door is opened in place, judging whether the elevator is positioned at the position of the door if the elevator door is opened in place, communicating the first node and the third node if the elevator door is opened in place, detecting a voltage signal of the second node, and outputting a short-circuit signal if the elevator door is opened in place;
and the control circuit is used for carrying out fault processing according to the short-circuit signal.
2. The elevator door lock loop short detection circuit of claim 1, wherein: the security detection module includes:
the safety circuit outputs a first control signal when the elevator arrives and is positioned at a destination floor door zone position, and controls the first node and the third node to be communicated according to a second control signal;
the detection circuit is connected with the safety circuit and receives a first control signal, detects a voltage signal of a third node when the elevator reaches a target floor leveling position and an elevator door is opened in place, outputs a short-circuit signal if the third node has the voltage signal, detects a voltage signal of a second node if the third node has the voltage signal, outputs the short-circuit signal if the second node has the voltage signal, detects whether the first control signal is received if the third node has the voltage signal, judges that the elevator is positioned at a door position and generates a second control signal if the third node has the voltage signal, detects the voltage signal of the second node after the second control signal is generated, and outputs the short-circuit signal if the second node has the voltage signal.
3. The elevator door lock loop short detection circuit of claim 2, wherein: a main control board of the detection circuit is provided with a door area signal input point, a door lock loop detection point, a door lock short circuit detection point, two leveling signal input points and a door opening in-place detection point, wherein the door area signal input point is connected with the output end of the first control signal on the safety circuit, the door lock loop detection point is connected with the third node, the door lock short circuit detection point is connected with the second node, the two leveling signal input points are respectively connected with a voltage signal through an upper leveling switch YP3 and a lower leveling switch YP4, so that the upper leveling switch YP3 and the lower leveling switch YP4 are conducted when the elevator reaches a target floor leveling position to provide a voltage signal for the detection circuit, and the detection circuit judges whether the elevator reaches the target floor leveling position according to the voltage signal; the door opening in-place detection point is connected with a door opening in-place signal output by the door opening in-place detection circuit, the door opening in-place detection circuit outputs a door opening in-place signal when the elevator is in place, and the detection circuit judges whether the elevator is in place or not according to the door opening in-place signal.
4. The elevator door lock loop short detection circuit of claim 2, wherein: the safety circuit is connected to a power signal and ground through a door zone switch YP1 and a door zone switch YP2 of the elevator, respectively, the door zone switch YP1 and the door zone switch YP2 are turned on when the elevator reaches a destination floor door zone position to supply power to the safety circuit, and the safety circuit outputs a first control signal when power is obtained.
5. The elevator door lock loop short detection circuit of claim 4, wherein: the safety circuit comprises a first electrifying loop, a second electrifying loop, a first control part and a second control part, wherein one end of the first electrifying loop is connected with a preset high level or low level, the other end of the first electrifying loop is connected with the detection circuit, one end of the second electrifying loop is connected with the first node, the other end of the second electrifying loop is connected with the third node, the first control part is connected with the power signal and controls the first electrifying loop to be conducted according to the power signal so as to output a first control signal, and the second control part is connected with the second control signal and controls the second electrifying loop to be conducted according to the second control signal so as to communicate the first node and the third node.
6. The elevator door lock loop short detection circuit of claim 5, wherein: the safety circuit comprises a first relay K1 and a second relay K2, wherein the first end of a coil of the relay K2 is connected with the power supply signal, the second end of the coil of the relay K1 is connected with the second control signal, the first end of the coil of the relay K1 is grounded, the second end of the coil of the relay K1 is connected with the first end of a first normally open switch of the relay K1, and the second end of the first normally open switch of the relay K1 outputs the first control signal; and a second normally-open switch of the relay K1 and a normally-open switch of the relay K2 are connected in series and then are connected between the first node and a third node, and the second control signal is a ground signal.
7. The utility model provides an elevator lock return circuit short circuit detection method, the lock return circuit of elevator includes the contact switch of layer lock and sedan-chair lock, and wherein, sedan-chair lock safety contact and a plurality of layers lock safety contact establish ties together and connect a voltage, and the first termination first voltage of a plurality of layers lock safety contact that connect together in series forms first node, and the second termination sedan-chair lock safety contact's first end forms the second node, the second end of sedan-chair lock safety contact forms the third node, its characterized in that: the elevator door lock loop short circuit detection method comprises the following steps:
detecting whether the elevator reaches a target floor leveling position and whether the elevator door is opened in place, if so, detecting a voltage signal of the third node, if so, outputting a short-circuit signal and carrying out fault processing, otherwise, detecting a voltage signal of the second node, if so, outputting a short-circuit signal and carrying out fault processing, otherwise, judging whether the elevator is positioned at the door position, if so, communicating the first node with the third node and detecting a voltage signal of the second node, and if so, outputting a short-circuit signal and carrying out fault processing.
8. The elevator door lock loop short circuit detection method of claim 7, wherein: the step of detecting whether the elevator reaches the destination floor leveling position and whether the elevator door is opened in place comprises the following steps: setting two leveling signal input points, respectively connecting the two leveling signal input points with power supply voltages through an upper leveling switch YP3 and a lower leveling switch YP4 so that the upper leveling switch YP3 and the lower leveling switch YP4 are conducted to provide voltage signals when the elevator reaches a target floor leveling position, and detecting whether the two leveling signal input points receive the voltage signals to judge whether the elevator reaches the target floor leveling position; and arranging a door opening in-place detection point, connecting the door opening in-place detection point with a door opening in-place detection circuit, outputting a door opening in-place signal by the door opening in-place detection circuit when the elevator is in place, and judging whether the elevator is opened according to the door opening in-place signal.
9. The elevator door lock loop short circuit detection method according to claim 8, characterized in that: the step of communicating the first node with the third node comprises: when the elevator is positioned at the position of the door zone, a second control signal is output to a safety circuit, and the safety circuit controls the first node and the third node to be communicated according to the second control signal.
10. The elevator door lock loop short circuit detection method of claim 9, characterized in that: the step of determining whether the elevator is located at a door zone location comprises: and a safety circuit is arranged, power ends of the safety circuit are respectively connected with a power signal and the ground through a door area switch YP1 and a door area switch YP2 of the elevator, a first control signal is output when the door area switch YP1 and the door area switch YP2 are closed, whether the first control signal is received or not is detected, and if yes, the elevator is judged to be positioned at the position of the door area.
11. The elevator door lock loop short circuit detection method of claim 10, wherein: the safety circuit comprises a first electrifying loop, a second electrifying loop, a first control part and a second control part, wherein one end of the first electrifying loop is connected with a high level or a low level, the other end of the first electrifying loop outputs a first control signal, one end of the second electrifying loop is connected with the first node, the other end of the second electrifying loop is connected with the third node, the first control part is connected with the power signal and controls the first electrifying loop to be conducted according to the power signal so as to output a first control signal, and the second control part is connected with the second control signal and controls the second electrifying loop to be conducted according to the second control signal so as to communicate the first node and the third node.
12. The elevator door lock loop short circuit detection method of claim 11, wherein: the safety circuit comprises a first relay K1 and a second relay K2, wherein the first end of a coil of the relay K2 is connected with the power supply signal, the second end of the coil of the relay K1 is connected with the second control signal, the first end of the coil of the relay K1 is grounded, the second end of the coil of the relay K1 is connected with the first end of a first normally open switch of the relay K1, and the second end of the first normally open switch of the relay K1 outputs the first control signal; and a second normally-open switch of the relay K1 and a normally-open switch of the relay K2 are connected in series and then are connected between the first node and a third node, and the second control signal is a ground signal.
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