Electromagnetic lock testing device for electric holding unlocking state of metro platform screen door

Abstract

The utility model discloses an electromagnetic lock testing device for an electric latching unlocking state of a metro shielding door, and relates to the field of electromagnetic lock testing. The device comprises a first voltage source, a second voltage source, a first relay, a second relay, a first signal generator and a second signal generator. The first voltage source is connected with a coil of the electromagnetic lock through the first relay; the second voltage source is connected with a coil of the electromagnetic lock through the second relay, and the voltage of the second voltage source is lower than that of the first voltage source; the first signal generator is connected with the control end of the first relay; the second signal generator is connected with the control end of the second relay, and the duty ratio of a first control signal output by the first signal generator is smaller than the duty ratio of a second control signal output by the second signal generator; the first relay and the second relay are both closed at a high level and disconnected at a low level. According to the technical scheme, the problem of heating in the electromagnetic lock testing process is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic lock testing, in particular to a testing device for an electromagnetic lock in the electrically held unlocked state of a subway platform screen door. Background Art

[0002] A subway platform screen door is a device installed at the edge of a subway platform, used to isolate the platform from the track, improve the safety, energy conservation and riding environment of passengers. The subway platform screen door usually uses an electromagnetic lock in the electrically held unlocked state as a locking mechanism. The working principle of the electromagnetic lock in the electrically held unlocked state of the subway platform screen door is as follows: when the electromagnetic lock is powered on, the coil of the electromagnetic lock generates a magnetic field, attracting the armature to drive the locking pin to move, and the electromagnetic lock unlocks and remains in the unlocked state; when the electromagnetic lock is powered off, the magnetic field disappears, and under the action of a return spring or other restoring force, the locking pin resets, and the electromagnetic lock locks.

[0003] Before being put into use, the electromagnetic lock will undergo at least thousands of unlocking and locking tests to ensure that the electromagnetic lock can meet the usage requirements. The working voltage of the electromagnetic lock in the electrically held unlocked state of the subway platform screen door is 110V DC voltage, and the suction current is about 1.2A. During the high-intensity test process, it will cause serious heating. Therefore, testing the electromagnetic lock based on the traditional testing device cannot meet the requirements of long-term testing. Summary of the Utility Model

[0004] In view of this, the present application provides a testing device for an electromagnetic lock in the electrically held unlocked state of a subway platform screen door, mainly aiming to solve the technical problem that the traditional testing device will cause the electromagnetic lock to heat up, thus unable to meet the requirements of long-term testing.

[0005] The utility model provides a testing device for an electromagnetic lock in the electrically held unlocked state of a subway platform screen door, which is used to test the unlocking and locking actions of the electromagnetic lock. The device includes: a first voltage source, a second voltage source, a first relay, a second relay, a first signal generator and a second signal generator;

[0006] The first voltage source is connected to the coil of the electromagnetic lock through the first relay, and the voltage of the first voltage source is the working voltage for unlocking the electromagnetic lock;

[0007] The second voltage source is connected to the coil of the electromagnetic lock through the second relay. The voltage of the second voltage source is lower than the voltage of the first voltage source and not lower than the minimum voltage for keeping the electromagnetic lock in the unlocked state;

[0008] The first signal generator is connected to the control end of the first relay;

[0009] The second signal generator is connected to the control end of the second relay, and the duty cycle of the first control signal output by the first signal generator is less than the duty cycle of the second control signal output by the second signal generator;

[0010] Both the first relay and the second relay are closed when at a high level and opened when at a low level.

[0011] In some embodiments, the electromagnetic lock includes a coil, an unlocking sensor, a locking sensor, an armature, a locking pin, and a locking pin bracket; the armature and the locking pin are fixed on the locking pin bracket, and the coil is sleeved outside the armature; the armature drives the locking pin bracket to move along the axial direction of the locking pin when the coil is energized or de-energized to control unlocking or locking of the electromagnetic lock; the unlocking sensor and the locking sensor are arranged along the axial direction of the locking pin, and a first baffle and a second baffle are provided on one side of the locking pin bracket close to the unlocking sensor and the locking sensor; the unlocking sensor outputs a high level when the electromagnetic lock is unlocked and the first baffle is detected, otherwise outputs a low level; the locking sensor outputs a high level when the electromagnetic lock is locked and the second baffle is detected, otherwise outputs a low level.

[0012] In some embodiments, the unlocking sensor and the locking sensor are optoelectronic sensors, and both the unlocking sensor and the locking sensor are provided with sensing ends; the sensing end includes a transmitting end and a receiving end arranged opposite to each other, and an induction area is formed between the transmitting end and the receiving end, and the width of the induction area is greater than the thickness of the first baffle or the second baffle; in the axial direction of the locking pin, the distance between the first baffle and the second baffle is less than the distance between the sensing ends of the unlocking sensor and the locking sensor; when the electromagnetic lock is unlocked, the locking pin bracket drives the first baffle to move to the induction area between the transmitting end and the receiving end of the unlocking sensor; when the electromagnetic lock is locked, the locking pin bracket drives the second baffle to move to the induction area between the transmitting end and the receiving end of the locking sensor.

[0013] In some embodiments, the device further includes a detection module; the input end of the detection module is connected to the output end of the second signal generator, the output end of the unlocking sensor, and the output end of the locking sensor; the output end of the detection module is connected to the enable end of the first signal generator and the enable end of the second signal generator.

[0014] In some embodiments, the detection module includes an exclusive-NOR gate, an exclusive-OR gate, and an AND gate; the input terminals of the exclusive-NOR gate are respectively connected to the output terminal of the unlocking sensor and the output terminal of the second signal generator; the input terminals of the exclusive-OR gate are respectively connected to the output terminal of the locking sensor and the output terminal of the second signal generator; the output terminals of the exclusive-NOR gate and the exclusive-OR gate are respectively connected to the input terminals of the AND gate, and the output terminal of the AND gate is connected to the enable terminals of the first signal generator and the second signal generator.

[0015] In some embodiments, the detection module further includes an inverter and an alarm module; the input terminal of the inverter is connected to the output terminal of the AND gate, and the output terminal of the inverter is connected to the alarm module.

[0016] In some embodiments, the detection module includes a timer, an exclusive-NOR gate, an exclusive-OR gate, a first AND gate, a second AND gate, an inverter, and an alarm module; the timer is configured to output a high level within a preset duration and output a low level after reaching the preset duration; the input terminals of the exclusive-NOR gate are respectively connected to the output terminal of the unlocking sensor and the output terminal of the second signal generator; the input terminals of the exclusive-OR gate are respectively connected to the output terminal of the locking sensor and the output terminal of the second signal generator; the output terminals of the exclusive-NOR gate and the exclusive-OR gate are respectively connected to the input terminals of the first AND gate, the output terminals of the timer and the first AND gate are respectively connected to the input terminals of the second AND gate, and the output terminal of the second AND gate is connected to the enable terminals of the first signal generator and the second signal generator; the input terminal of the inverter is connected to the output terminal of the second AND gate, and the output terminal of the inverter is connected to the alarm module.

[0017] In some embodiments, the alarm module is a buzzer and / or a light-emitting diode; the alarm module is configured to emit an alarm signal when the electromagnetic lock malfunctions and / or when the preset duration is reached.

[0018] A test device for an electromagnetic lock that electrically maintains the unlocked state of a subway platform screen door provided by the present utility model is used to test the unlocking and locking actions of the electromagnetic lock. The device includes: a first voltage source, a second voltage source, a first relay, a second relay, a first signal generator, and a second signal generator; the first voltage source is connected to the coil of the electromagnetic lock through the first relay, and the voltage of the first voltage source is the operating voltage for unlocking the electromagnetic lock; the second voltage source is connected to the coil of the electromagnetic lock through the second relay, the voltage of the second voltage source is lower than the voltage of the first voltage source and not lower than the minimum voltage for maintaining the unlocked state of the electromagnetic lock; the first signal generator is connected to the control terminal of the first relay; the second signal generator is connected to the control terminal of the second relay, and the duty cycle of the first control signal output by the first signal generator is less than the duty cycle of the second control signal output by the second signal generator; both the first relay and the second relay are closed when at a high level and opened when at a low level. In the technical solution of this application, the voltage output by the first voltage source is the operating voltage capable of unlocking the electromagnetic lock, and the voltage output by the second voltage source is less than the voltage output by the first voltage source and is the voltage capable of maintaining the unlocked state of the electromagnetic lock. Therefore, during the testing of the electromagnetic lock, after unlocking the electromagnetic lock by using the first control voltage output by the first voltage source, the electromagnetic lock can be kept in the unlocked state by the second control voltage output by the second voltage source. And since the second control voltage is less than the first control voltage, compared with the traditional solution of only unlocking and maintaining the unlocked state of the electromagnetic lock by the operating voltage, the device provided in this application greatly reduces the power consumption when maintaining the unlocked state and solves the problem of heat generation. During the electromagnetic lock testing process, it can support thousands of consecutive unlocking and locking actions of the electromagnetic lock and can meet the requirements of long-term and high-frequency testing of the electromagnetic lock.

[0019] The above description is only an overview of the technical solution of this application. In order to be able to understand the technical means of this application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features, and advantages of this application more obvious and understandable, the following specifically gives the specific implementation manners of this application. Brief Description of the Drawings

[0020] The drawings described herein are used to provide a further understanding of the present utility model and constitute a part of this application. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the drawings:

[0021] Figure 1 Shows the structural schematic diagram of a test device for an electromagnetic lock that electrically maintains the unlocked state of a subway platform screen door provided by an embodiment of the present utility model;

[0022] Figure 2Shows a waveform diagram of a first control signal and a second control signal provided by an embodiment of the present utility model;

[0023] Figure 3 Shows a structural schematic diagram of another electromagnetic lock test device for the electrically held unlocked state of a subway platform screen door provided by an embodiment of the present utility model;

[0024] Figure 4 Shows a circuit structural schematic diagram of a signal generator provided by an embodiment of the present utility model;

[0025] Figure 5 Shows a front view of an electromagnetic lock provided by an embodiment of the present utility model;

[0026] Figure 6 Shows a structural schematic diagram of an electromagnetic lock provided by an embodiment of the present utility model;

[0027] Figure 7 Shows a structural schematic diagram of an unlocking sensor provided by an embodiment of the present utility model;

[0028] Figure 8 Shows a structural schematic diagram of a lock pin assembly provided by an embodiment of the present utility model;

[0029] Figure 9 Shows a structural schematic diagram of a detection module provided by an embodiment of the present utility model;

[0030] Figure 10 Shows a structural schematic diagram of another detection module provided by an embodiment of the present utility model;

[0031] Figure 11 Shows a structural schematic diagram of yet another detection module provided by an embodiment of the present utility model.

[0032] Illustration:

[0033] A - operational amplifier, R1 - first resistor, R2 - second resistor, R3 - third resistor, R4 - fourth resistor, R5 - fifth resistor, C - capacitor, D1 - first diode, D2 - second diode, Dz - bidirectional diode, U - output terminal of the signal generator, 10 - coil, 21 - unlocking sensor, 22 - locking sensor, 20 - induction end, 30 - lock pin bracket, 31 - first baffle, 32 - second baffle, 40 - lock pin, 50 - armature, 60 - elastic member, XNOR - exclusive NOR gate, XOR - exclusive OR gate, AND - AND gate, NOT - inverter, AND1 - first AND gate, AND2 - second AND gate, P - output terminal of the detection module. Detailed implementation manners

[0034] The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other.

[0035] In one embodiment, as Figure 1 shown, a test device for an electromagnetic lock in an electrically held unlocked state of a subway platform screen door is provided for testing the electromagnetic lock in the electrically held unlocked state. The device includes: a first voltage source, a second voltage source, a first relay, a second relay, a first signal generator, and a second signal generator. Among them, the first voltage source is connected to the coil 10 of the electromagnetic lock through the first relay, and the voltage of the first voltage source is the operating voltage for unlocking the electromagnetic lock; the second voltage source is connected to the coil 10 of the electromagnetic lock through the second relay, the voltage of the second voltage source is lower than the voltage of the first voltage source and not lower than the minimum voltage for keeping the electromagnetic lock in the unlocked state; the first signal generator is connected to the control end of the first relay; the second signal generator is connected to the control end of the second relay.

[0036] In the above embodiment, in tests such as the action integrity of the electromagnetic lock and the service life of the electromagnetic lock, it is necessary to test the unlocking action and the locking action of the electromagnetic lock during the test process, and usually, the electromagnetic lock needs to continuously repeat the unlocking and locking actions within a certain period of time. For the electromagnetic lock in the electrically held unlocked state applied to the subway platform screen door, the operating voltage is relatively large. For example, the operating voltage is usually 110V DC voltage, and the pulling-in (unlocking) current of the electromagnetic lock is about 1.2A. Therefore, in tests such as the above that require long-term or high-frequency power-on of the electromagnetic lock, it will cause high power consumption and serious heating, and further damage the circuit.

[0037] To solve the problem of heat generation in the electromagnetic lock test, in this embodiment, the coil 10 of the electromagnetic lock is connected to the first voltage source and the second voltage source at the same time. The electromagnetic lock is unlocked by the higher first control voltage sent by the first voltage source, and then the electromagnetic lock is kept in the unlocked state by the lower second control voltage sent by the second voltage source. Among them, the first control voltage is the operating voltage of the electromagnetic lock. For the electromagnetic lock of the subway platform screen door in the electrically held unlocked state, the first control voltage can be the 110V operating voltage. The second control voltage is lower than the first control voltage. Specifically, the second control voltage needs to be able to keep the armature 50 of the electromagnetic lock in the attracted state, and the voltage value should be as small as possible. For example, in this embodiment, during the monitoring of the current and suction force in the electromagnetic lock test process, it is found that after the electromagnetic lock is connected to the 110V operating voltage and the voltage is gradually reduced to 24V, the armature 50 of the electromagnetic lock can still remain in the attracted state, and the current is only 0.27A at this time. Therefore, the second control voltage can be selected as 24V. It should be noted that the voltage value of the second control voltage in this embodiment is only an example for the description of this embodiment. In actual applications, the second control voltage can be determined by calculation or measurement according to the actual situation.

[0038] In this embodiment, during the test of the electromagnetic lock, the unlocking action and locking action of the electromagnetic lock need to be repeatedly tested. The coil 10 of the electromagnetic lock is unlocked when powered on and locked when powered off. To control the power on and off of the coil 10, a first relay can be connected between the first voltage source and the coil 10, and a first signal generator can be connected to the control end of the first relay. The on and off of the first relay is controlled by the first control signal output by the first signal generator, and then the first voltage source is controlled to supply power to and cut off power from the coil 10 repeatedly. Similarly, a second relay is connected between the second voltage source and the coil 10, and a second signal generator is connected to the control end of the second relay. The on and off of the second relay is controlled by the second control signal output by the second signal generator, and then the second voltage source is controlled to supply power to and cut off power from the coil 10 repeatedly.

[0039] In this embodiment, in order to reduce the heat generation during the test of the electromagnetic lock, for the unlocked state of the electromagnetic lock, it can be set to unlock the electromagnetic lock with a higher voltage (the first control voltage) for a shorter time and keep the electromagnetic lock in the unlocked state with a lower voltage (the second control voltage) for a longer time. This can reduce the input time of the high voltage to the electromagnetic lock, and thus reduce the heat generation. Specifically, the input time of the first control voltage and the second control voltage to the electromagnetic lock can be achieved by setting the duty cycle of the first control signal output by the first signal generator and the duty cycle of the second control signal output by the second signal generator.

[0040] In this embodiment, the duty cycle of the first control signal output by the first signal generator is less than the duty cycle of the second control signal output by the second signal generator. The first control signal and the second control signal have the same period and are synchronized. The first relay and the second relay can be normally open relays, which are closed at high level and open at low level. In the above embodiment, the waveform diagrams of the first control signal and the second control signal can be as shown in Figure 2 shown. The period of the first control signal and the second control signal is T. Within one period T, in the 0 - t1 stage, both the first control signal and the second control signal output high level, controlling the first relay and the second relay to close. At this time, the electromagnetic lock is unlocked by the first control voltage. In the t1 - t2 stage, the first control signal outputs low level, and the second control signal still outputs high level, controlling the first relay to open and the second relay to close. At this time, the electromagnetic lock remains in the unlocked state by the second control voltage. In the t2 - T stage, both the first control signal and the second control signal output low level, controlling the first relay and the second relay to open. At this time, the coil 10 is powered off and the electromagnetic lock is locked.

[0041] Among them, the first control signal and the second control signal have the same period and are synchronized. The period and the duty cycle can be set according to actual needs. In one example, the period can be set to 4 seconds, t1 can be set to 0.5 seconds, and t2 can be set to 2 seconds.

[0042] The electromagnetic lock test device for the electrically - held unlocked state of the subway platform screen door provided in this embodiment connects the first voltage source and the second voltage source to the coil 10 of the electromagnetic lock at the same time, and sets the voltage output by the second voltage source to be less than the voltage output by the first voltage source. And the on - off of the first relay and the second relay are respectively controlled by the control signals generated by the first signal generator and the second signal generator, so as to control the voltage input of the first voltage source and the second voltage source to the electromagnetic lock. Thus, it can be realized that the electromagnetic lock is unlocked by a higher voltage and remains in the unlocked state by a lower voltage, thereby reducing power consumption and solving the heating problem. During the electromagnetic lock test process, it supports thousands of consecutive unlocking and locking actions of the electromagnetic lock, and can meet the requirements of long - time and high - frequency testing of the electromagnetic lock. In one embodiment, the structures of the first signal generator and the second signal generator can be as shown in Figure 4As shown in the figure, it includes: operational amplifier A, first resistor R1, second resistor R2, third resistor R3, fourth resistor R4, fifth resistor R5, first diode D1, second diode D2, bidirectional diode Dz, and capacitor C. The non-inverting input terminal of operational amplifier A is connected to the input terminal of first resistor R1, the output terminal of first resistor R1 is grounded, the non-inverting input terminal of operational amplifier A is also connected to the input terminal of second resistor R2, the output terminal of second resistor R2 is connected to the output terminal of fourth resistor R4, the output terminal of fourth resistor R4 is also grounded through bidirectional diode Dz, and the input terminal of fourth resistor R4 is connected to the output terminal of operational amplifier A. The inverting input terminal of operational amplifier A is grounded through capacitor C, and the inverting input terminal of operational amplifier A is also connected to the input terminal of third resistor R3. The output terminal of third resistor R3 is connected to the cathode of first diode D1 and the anode of second diode D2. Fifth resistor R5 is a sliding resistor, the anode of first diode D1 and the cathode of second diode D2 are respectively connected to both ends of fifth resistor R5, and the sliding terminal of fifth resistor R5 is connected to the output terminal of fourth resistor R4. Among them, the output terminal of fourth resistor R4 is the output terminal U of the signal generator, which is used to output a control signal.

[0043] In the above embodiment, the structures of the first signal generator and the second signal generator are the same. By setting different parameters for the first signal generator and the second signal generator, the duty cycles of the first control signal and the second control signal can be set. For example, by adjusting the resistance value of fifth resistor R5, the duty cycle of the control signal can be adjusted. In the above example, for example, the duty cycle of the first control signal can be 1 / 8, and the duty cycle of the second control signal can be 1 / 2. In the above embodiment, through the first signal generator and the second signal generator that output control signals with different duty cycles, the on-off times of the first relay and the second relay are respectively controlled, so as to separately control the voltage input time of the first voltage source and the second voltage source to the electromagnetic lock. The duty cycle of the first control signal is less than that of the second control signal, which can reduce the time of inputting high voltage to the electromagnetic lock, reduce power consumption, and thus avoid heating during the test.

[0044] In one embodiment, as Figure 5 , Figure 6 shown in the structure of the electromagnetic lock, and Figure 8The structure of the locking pin assembly of the electromagnetic lock shown. The electromagnetic lock includes a coil 10, an unlocking sensor 21, a locking sensor 22, an armature 50, a locking pin 40, and a locking pin bracket 30; the armature 50 and the locking pin 40 are fixed on the locking pin bracket 30, and the coil 10 is sleeved outside the armature 50; when the coil 10 is energized or de-energized, the armature 50 drives the locking pin bracket 30 to move along the axial direction of the locking pin 40 to control the unlocking or locking of the electromagnetic lock; the unlocking sensor 21 and the locking sensor 22 are arranged along the axial direction of the locking pin 40, and the locking pin bracket 30 is provided with a first baffle 31 and a second baffle 32 on the side close to the unlocking sensor 21 and the locking sensor 22; when the electromagnetic lock is unlocked and the first baffle 31 is detected by the unlocking sensor 21, a high level is output, otherwise a low level is output; when the electromagnetic lock is locked and the second baffle 32 is detected by the locking sensor 22, a high level is output, otherwise a low level is output.

[0045] Specifically, as Figure 7 Taking the structure of the unlocking sensor shown as a reference, the unlocking sensor 21 and the locking sensor 22 are photoelectric sensors, and both the unlocking sensor 21 and the locking sensor 22 are provided with an induction end 20; the induction end 20 includes a transmitting end and a receiving end arranged oppositely, and an induction area is formed between the transmitting end and the receiving end, and the width of the induction area is greater than the thickness of the first baffle 31 or the second baffle 32; in the axial direction of the locking pin 40, the distance between the first baffle 31 and the second baffle 32 is less than the distance between the induction ends 20 of the unlocking sensor 21 and the locking sensor 22; when the electromagnetic lock is unlocked, the locking pin bracket 30 drives the first baffle 31 to move to the induction area between the transmitting end and the receiving end of the unlocking sensor 21; when the electromagnetic lock is locked, the locking pin bracket 30 drives the second baffle 32 to move to the induction area between the transmitting end and the receiving end of the locking sensor 22.

[0046] In the above embodiment, the electromagnetic lock realizes unlocking and locking through the movement of the locking pin assembly. Among them, the locking pin assembly includes a locking pin 40, a locking pin bracket 30, an armature 50, and an elastic member 60. One end of the armature 50 is fixed on the locking pin bracket 30, and the other end is sleeved inside the electromagnetic lock coil 10. An elastic member 60 is also sleeved between the armature 50 and the coil 10. When the coil 10 is energized, a magnetic field is generated, the armature 50 is attracted, and the elastic member 60 is compressed; when the coil 10 is de-energized, the magnetic field disappears, and under the action of the restoring force of the elastic member 60, the armature 50 resets. Since the armature 50 is connected to the locking pin 40 through the locking pin bracket 30, when the armature 50 moves, the locking pin 40 is driven to move through the locking pin bracket 30, thereby realizing unlocking and locking.

[0047] To provide feedback on the operating state of the electromagnetic lock, two baffles are provided on the lock pin bracket 30 along the moving direction of the lock pin 40, and two sensors are correspondingly provided. The sensors can be fixed on the housing of the electromagnetic lock and do not move with the lock pin bracket 30. The sensors can be optoelectronic sensors, with an induction end 20. The induction end 20 includes a transmitting end and a receiving end, and the space between the transmitting end and the receiving end is the induction space. During the movement of the lock pin bracket 30, when the baffle moves into the induction space of the sensor, the sensor outputs a high-level induction signal; when the baffle does not move into the induction space of the sensor, the sensor outputs a low-level induction signal.

[0048] In the above embodiment, when the electromagnetic lock is unlocked and locked, the unlocking action or locking action of the electromagnetic lock is detected simultaneously by the unlocking sensor 21 and the locking sensor 22, which can improve the accuracy of the detection result. Among them, the first baffle 31 corresponds to the unlocking sensor 21, the second baffle 32 corresponds to the locking sensor 22, and the distance between the first baffle 31 and the second baffle 32 is less than the distance between the induction ends 20 of the unlocking sensor 21 and the locking sensor 22. When the electromagnetic lock is unlocked, the lock pin bracket 30 drives the first baffle 31 into the induction area of the unlocking sensor 21, and the second baffle 32 moves out of the induction area of the locking sensor 22. The unlocking sensor 21 outputs a high level while the locking sensor 22 outputs a low level. When the electromagnetic lock is locked, the lock pin bracket 30 drives the first baffle 31 out of the induction area of the unlocking sensor 21, and the second baffle 32 moves into the induction area of the locking sensor 22. The unlocking sensor 21 outputs a low level while the locking sensor 22 outputs a high level.

[0049] In one embodiment, the device further includes a detection module; the input end of the detection module is connected to the output end of the second signal generator, the output end of the unlocking sensor 21, and the output end of the locking sensor 22; the output end of the detection module is connected to the enable end of the first signal generator and the enable end of the second signal generator.

[0050] In the above embodiment, based on the above operating principle of the electromagnetic lock, as Figure 3As shown, a detection module is provided in the test device to detect the operation of the electromagnetic lock through the detection module. Specifically, based on the second control signal, the induction signals output by the unlocking sensor 21 and the locking sensor 22 are detected. The output end of the second signal generator, the output end of the unlocking sensor 21, and the output end of the locking sensor 22 are connected to the input end of the detection module. The detection module detects whether the electromagnetic lock operates normally through logical judgment. If the operation is abnormal, the detection module can also control the suspension of the test of the electromagnetic lock. Specifically, the output end P of the detection module is connected to the enable ends of the first signal generator and the second signal generator simultaneously. When it is detected that the electromagnetic lock operates normally, the detection module outputs a high level to keep the first signal generator and the second signal generator in an active state. When it is detected that the electromagnetic lock operates abnormally, the detection module outputs a low level to convert the first signal generator and the second signal generator into a closed state and stop the test of the electromagnetic lock. Among them, a relay can be connected to the power supply end of the signal generator as the enable end ( Figure 4 not shown in the figure), and the working state of the signal generator is controlled by controlling the on / off of the relay.

[0051] In the above embodiment, by setting the detection module, during the test of the electromagnetic lock, it can be detected whether the electromagnetic lock operates normally, and when the operation is abnormal, the signal generator can be automatically controlled to stop working, cutting off the voltage input to the electromagnetic lock to avoid burning out the circuit.

[0052] In one embodiment, as Figure 9 shown, the detection module specifically includes an XNOR gate, an XOR gate, and an AND gate. Among them, the input ends of the XNOR gate are respectively connected to the output end of the unlocking sensor 21 and the output end of the second signal generator; the input ends of the XOR gate are respectively connected to the output end of the locking sensor 22 and the output end of the second signal generator; the output ends of the XNOR gate and the XOR gate are connected to the input end of the AND gate, and the output end of the AND gate is connected to the enable ends of the first signal generator and the second signal generator. That is to say, the output end of the AND gate is the output end P of the detection module. The detection logic is that if the output levels of the unlocking sensor 21 and the second signal generator are the same, and the output levels of the locking sensor 22 and the second signal generator are opposite, the electromagnetic lock operates normally, and at this time the detection module outputs a high level. If one of the conditions is not met, the electromagnetic lock operates abnormally, and the detection module outputs a low level.

[0053] In one embodiment, the detection module may further include an inverter NOT and an alarm module; the input end of the inverter NOT is connected to the input end of the AND gate, and the output end of the inverter NOT is connected to the alarm module; the alarm module is a buzzer and / or a light-emitting diode.

[0054] In the above embodiment, an alarm module may further be provided in the detection module for emitting an alarm signal when it detects an abnormal operation of the electromagnetic lock. For example, when the alarm module is a buzzer, the alarm signal is emitted through sound, and when the alarm module is a light-emitting diode, the alarm signal is emitted through light emission. The alarm module is driven by a high level and has an output logic opposite to that of the detection module (the output of the detection module is high level when the electromagnetic lock operates normally and low level when the operation is abnormal). Therefore, at the output end of the detection module, that is, at the output end of the AND gate, an inverter NOT is connected, and the alarm module is connected through the inverter NOT to emit an alarm when the electromagnetic lock operates abnormally.

[0055] In the above embodiment, by providing a detection module, it is possible to detect whether the operation of the electromagnetic lock is normal and control the testing process of the electromagnetic lock based on the detection result. When the electromagnetic lock operates abnormally, a low level is input to the enable terminals of the first signal generator and the second signal generator to pause the testing of the electromagnetic lock. And through the alarm module, when it detects an abnormal operation of the electromagnetic lock, an alarm signal is emitted to remind relevant personnel to perform subsequent operations, eliminating the need for manual monitoring of the testing process of the electromagnetic lock, reducing labor costs, and improving work efficiency.

[0056] In one embodiment, the detection module may further include a timer (or counter). The detection duration for the electromagnetic lock is set through the timer. Of course, according to the cycle of one unlocking action and one locking action of the electromagnetic lock, the detection times for the electromagnetic lock can also be set by setting the detection duration. When the timer does not reach the preset duration, a high level is output. When the timer reaches the preset duration, a low level is output. In this embodiment, the detection module includes a timer, an exclusive-NOR gate XNOR, an exclusive-OR gate XOR, a first AND gate AND1, a second AND gate AND2, an inverter NOT, and an alarm module; the input terminals of the exclusive-NOR gate XNOR are respectively connected to the output terminal of the unlocking sensor 21 and the output terminal of the second signal generator; the input terminals of the exclusive-OR gate XOR are respectively connected to the output terminal of the locking sensor 22 and the output terminal of the second signal generator; the output terminals of the exclusive-NOR gate XNOR and the exclusive-OR gate XOR are respectively connected to the input terminals of the first AND gate AND1, the timer and the output terminal of the first AND gate AND1 are respectively connected to the input terminals of the second AND gate AND2, and the output terminal of the second AND gate AND2 is connected to the enable terminals of the first signal generator and the second signal generator; the input terminal of the inverter NOT is connected to the output terminal of the second AND gate AND2, and the output terminal of the inverter NOT is connected to the alarm module; the alarm module is a buzzer and / or a light-emitting diode. The detection logic is that the output levels of the unlocking sensor 21 and the second signal generator are the same, the output levels of the locking sensor 22 and the second signal generator are opposite, and the preset duration is not reached, the detection module outputs a high level. If one of the conditions is not satisfied, the detection module outputs a low level, and the alarm module issues an alarm signal.

[0057] In the above embodiment, the test duration or times of the electromagnetic lock can be set through the timer or counter according to the actual test requirements. When the test duration or times are reached, the test is automatically stopped without manual monitoring of the test duration or times, making the test process more intelligent, reducing the labor input cost, and improving the test efficiency and accuracy.

[0058] By applying the technical solution of the present application, during the process of testing the electromagnetic lock, after the electromagnetic lock is unlocked by the first control voltage output by the first voltage source, the electromagnetic lock is kept in the unlocked state by the second control voltage output by the second voltage source. Since the second control voltage is less than the first control voltage, compared with the traditional method of unlocking and keeping the unlocked state by the first control voltage, the device provided by the present application greatly reduces the power consumption when keeping the unlocked state, solves the heating problem, and during the electromagnetic lock test process, supports thousands of consecutive unlocking and locking actions of the electromagnetic lock, and can meet the requirements of long-time and high-frequency testing of the electromagnetic lock.

[0059] It should be noted that in the above embodiments, the functions provided by individual modules such as signal generators, exclusive-OR gates XOR, equivalence gates XNOR, AND gates AND, inverters NOT, voltage sources, counters, alarm modules, etc. are all prior art. The function of the electromagnetic lock test device for the electric hold-unlock state of subway platform screen doors provided in this embodiment is mainly achieved through the circuit connection relationships between the various modules and their mutual cooperation, rather than relying on a program module in a certain module. In addition, for modules that can implant program modules, the implementation of their module functions can be achieved through the program modules provided by the prior art.

[0060] Those skilled in the art can understand that the drawings are only schematic diagrams of a preferred implementation scenario, and the modules or processes in the drawings are not necessarily essential for implementing this application. Those skilled in the art can understand that the modules in the device in the implementation scenario can be distributed in the device in the implementation scenario according to the description of the implementation scenario, or can be correspondingly changed and located in one or more devices different from this implementation scenario. The modules in the above implementation scenario can be combined into one module, or further split into multiple sub-modules.

[0061] The above serial numbers of this application are only for description and do not represent the advantages or disadvantages of the implementation scenarios. The above disclosure is only several specific implementation scenarios of this application. However, this application is not limited thereto, and any changes that can be thought of by those skilled in the art should fall within the protection scope of this application.

Claims

1. A subway screen door electrically unlocked electromagnetic lock test device, used to test the unlocking and locking actions of the electromagnetic lock, characterized in that: The device comprises: a first voltage source, a second voltage source, a first relay, a second relay, a first signal generator and a second signal generator; The first voltage source is connected to the coil of the electromagnetic lock through the first relay, and the voltage of the first voltage source is the working voltage for unlocking the electromagnetic lock; The second voltage source is connected to the coil of the electromagnetic lock through the second relay, and the voltage of the second voltage source is lower than the voltage of the first voltage source and is not lower than the minimum voltage for keeping the electromagnetic lock in an unlocked state; The first signal generator is connected to the control end of the first relay; The second signal generator is connected to the control end of the second relay, and the duty cycle of the first control signal output by the first signal generator is smaller than the duty cycle of the second control signal output by the second signal generator; The first relay and the second relay are both closed at a high level and opened at a low level.

2. The device according to claim 1, characterized in that The electromagnetic lock comprises a coil, an unlocking sensor, a locking sensor, an armature, a lock pin, and a lock pin bracket; The armature and the lock pin are fixed on the lock pin bracket, and the coil is sleeved outside the armature; The armature drives the lock pin bracket to move along the axial direction of the lock pin when the coil is powered on or off, thereby controlling the electromagnetic lock to be unlocked or locked; The unlocking sensor and the locking sensor are arranged along the axial direction of the lock pin, and the lock pin bracket is provided with a first baffle and a second baffle on a side close to the unlocking sensor and the locking sensor; The unlocking sensor outputs a high level when the electromagnetic lock is unlocked and the first baffle is detected, otherwise it outputs a low level; The lock sensor outputs a high level when the electromagnetic lock is locked and detects the second baffle, and otherwise outputs a low level.

3. The device according to claim 2, characterized in that The unlocking sensor and the locking sensor are photoelectric sensors, and both the unlocking sensor and the locking sensor are provided with a sensing end; The sensing end comprises a transmitting end and a receiving end which are arranged opposite to each other, a sensing area is formed between the transmitting end and the receiving end, and a width of the sensing area is greater than a thickness of the first baffle or the second baffle; In the axial direction of the lock pin, the distance between the first baffle plate and the second baffle plate is smaller than the distance between the sensing end of the unlocking sensor and the sensing end of the locking sensor; When the electromagnetic lock is unlocked, the lock pin bracket drives the first baffle to move to the sensing area between the transmitting end and the receiving end of the unlocking sensor; When the electromagnetic lock is locked, the lock pin bracket drives the second baffle to move to the sensing area between the transmitting end and the receiving end of the lock sensor.

4. The device according to claim 2, characterized in that The device also includes a detection module; The input end of the detection module is connected to the output end of the second signal generator, the output end of the unlocking sensor, and the output end of the locking sensor; The output end of the detection module is connected to the enable end of the first signal generator and the enable end of the second signal generator.

5. The device according to claim 4, characterized in that The detection module includes an XOR gate, an XOR gate, and an AND gate; The input end of the XNOR gate is connected to the output end of the unlocking sensor and the output end of the second signal generator respectively; The input end of the XOR gate is connected to the output end of the lock sensor and the output end of the second signal generator respectively; The output end of the XOR gate and the output end of the XOR gate are connected to the input end of the AND gate respectively, and the output end of the AND gate is connected to the enable end of the first signal generator and the enable end of the second signal generator.

6. The device according to claim 5, characterized in that The detection module also includes an inverter and an alarm module; The input end of the inverter is connected to the output end of the AND gate, and the output end of the inverter is connected to the alarm module.

7. The device according to claim 4, characterized in that The detection module includes a timer, an XOR gate, an XOR gate, a first AND gate, a second AND gate, an inverter and an alarm module; The timer is used to output a high level within a preset time period, and output a low level after the preset time period is reached; The input end of the XNOR gate is connected to the output end of the unlocking sensor and the output end of the second signal generator respectively; The input end of the XOR gate is connected to the output end of the lock sensor and the output end of the second signal generator respectively; The output end of the XOR gate and the output end of the XOR gate are connected to the input end of the first AND gate respectively, the output end of the timer and the first AND gate are connected to the input end of the second AND gate respectively, and the output end of the second AND gate is connected to the enable end of the first signal generator and the enable end of the second signal generator; The input end of the inverter is connected to the output end of the second AND gate, and the output end of the inverter is connected to the alarm module.

8. The device according to claim 6 or 7, characterized in that The alarm module is a buzzer and / or a light emitting diode; The alarm module is used to send out an alarm signal when the electromagnetic lock operates abnormally and / or reaches a preset time.

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