Automatic troubleshooting system and method for feedback switch of elevator brake

Abstract

The invention discloses an elevator brake feedback switch automatic troubleshooting system which comprises a safety signal acquisition module, a safety controller module and a brake loop control module, the safety controller module is connected with the safety signal acquisition module, and the brake loop control module is connected with the safety controller module; the safety controller module is used for generating a brake enable signal according to the safety signal acquired by the safety signal acquisition module and transmitting the brake enable signal to the brake loop control module; the brake loop control module is used for controlling the opening and closing operation of an elevator brake according to the brake enable signal output by the safety controller module; the safety controller module is used for controlling the traction machine to keep a static state when judging that the action of the elevator brake feedback switch is inconsistent with the action of the elevator brake, and triggering a brake troubleshooting mode through the brake loop control module; in the process of the brake troubleshooting mode, the brake loop control module conducts braking and is used for controlling the normal brake to be kept in the closed state and then controlling the abnormal brake to be repeatedly closed and opened.

Description

Technical Field

[0001] This invention relates to the field of elevator control technology, and more specifically, to an automatic obstacle removal system and method for elevator brake feedback switches. Background Technology

[0002] As a special type of equipment, elevators are subject to safety regulations in the industry, with national standards governing their manufacturing and installation. The elevator's drive unit brake, a core safety component, is subject to self-monitoring requirements according to national standards. This self-monitoring includes verifying the correct lifting (or releasing) of each mechanical device and / or verifying the braking force under the action of each mechanical device.

[0003] Currently, the industry commonly uses microswitches to detect the lifting (or releasing) status of the drive unit's brake, and then uses system software logic to detect whether the brake's action is correct. For example, when the elevator opens its brake, it checks whether the microswitch opens synchronously. If the microswitch is not detected to be open for one second, the brake is considered abnormal, the control system stops the elevator and reports a fault, alerting maintenance personnel for repair. When the elevator stops running and closes its brake, it checks whether the microswitch closes synchronously. If the microswitch is not closed for one second, the brake is considered abnormal, the control system stops the elevator and reports a fault, alerting maintenance personnel for repair. Furthermore, because the brake is determined to be not properly closed, some elevators will keep the doors tightly closed to ensure passenger safety, preventing passengers from entering or exiting, which could lead to entrapment incidents.

[0004] Since the effective travel of a micro switch is about 1-2mm, the micro switch is affected by the on-site environment and high-frequency use. The micro switch may have poor contact or malfunction, which may cause the elevator to falsely detect abnormal brake operation, falsely report a fault, and trap people. The above phenomenon usually occurs occasionally during normal use of the elevator. After the on-site personnel reset the fault, the elevator can operate normally again. Summary of the Invention

[0005] The purpose of this invention is to overcome the defects and deficiencies of the prior art and provide an automatic fault clearing system and method for elevator brake feedback switches. By first controlling the normal closing of the elevator brake and then controlling the abnormal closing and opening operation of the elevator brake, the system solves the problem of poor contact of the elevator brake feedback switch and improves the safety and reliability of elevator operation.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] An automatic obstacle removal system for elevator brake feedback switch includes a safety signal acquisition module, a safety controller module, and a brake circuit control module. The safety controller module is connected to the safety signal acquisition module, and the brake circuit control module is connected to the safety controller module.

[0008] The safety controller module generates a brake enable signal based on the safety signals acquired by the safety signal acquisition module, and transmits the brake enable signal to the brake circuit control module; the brake circuit control module controls the opening and closing operation of the elevator brake based on the brake enable signal output by the safety controller module.

[0009] The safety controller module is used to determine when the elevator brake feedback switch action is inconsistent with the elevator brake action, control the traction machine to remain stationary, and trigger the brake clearance mode through the brake circuit control module. During the brake clearance mode, the brake circuit control module first controls the normal brake to remain closed, and then controls the abnormal brake to repeatedly close and open.

[0010] The safety signal acquisition module includes electrical safety switches and brake feedback switches. The electrical safety switches include hoistway safety switches, hall door lock safety switches, car door lock safety switches, car position sensors, and door zone sensors. The brake feedback switches are used to detect the open and closed status of the elevator brake.

[0011] The safety controller module includes a first safety control unit and a second safety control unit;

[0012] The first safety control unit is used to generate a brake enable signal based on the safety signal acquired by the safety signal acquisition module, and transmit the brake enable signal to the brake circuit control module.

[0013] The second safety control unit is used to determine when the elevator brake feedback switch action is inconsistent with the elevator brake action, control the traction machine to remain stationary, and trigger the brake to clear obstacles.

[0014] The brake circuit control module includes a brake power supply circuit and a brake control circuit. The brake power supply circuit supplies power to the brake control circuit according to the brake enable signal. The brake control circuit includes a first switching transistor unit and a second switching transistor unit. The first switching transistor unit is used for chopper control, and the second switching transistor unit is used for on / off control.

[0015] The safety controller module also includes a PWM controller, which is used to perform timing control on the brake enable signal.

[0016] An automatic obstacle removal method for an elevator brake feedback switch, applied to any of the above-described automatic obstacle removal systems for elevator brake feedback switches, includes the following steps:

[0017] When the elevator is running normally, the safety controller module collects elevator safety signals through the safety signal acquisition module. The safety controller module generates a brake enable signal based on the safety signal and transmits the brake enable signal to the brake circuit control module. The brake circuit control module controls the opening and closing operation of the elevator brake based on the brake enable signal to realize the normal operation of the elevator.

[0018] When the safety controller module determines that the elevator brake feedback switch is abnormal through the safety signal, it controls the traction machine to remain stationary and triggers the brake troubleshooting mode. The brake circuit control module first controls the normal brake to remain closed, and then controls the abnormal brake to repeatedly close and open. The abnormal contact of the elevator brake feedback switch is resolved by repeatedly opening the brake.

[0019] The first safety control unit of the safety controller module generates a brake enable signal based on the safety signal acquired by the safety signal acquisition module, and transmits the brake enable signal to the brake circuit control module.

[0020] The second safety control unit of the safety controller module determines, through safety signals, that when the action of the elevator brake feedback switch is inconsistent with the action of the elevator brake, it controls the traction machine to remain stationary and triggers the brake to clear the obstruction.

[0021] During the brake clearance mode, the safety controller module continuously monitors the elevator safety signals collected by the safety signal acquisition module. If any of the shaft safety switch, hall door lock safety switch, or car door lock safety switch is disconnected, the safety controller module will forcibly exit the brake clearance mode and control the elevator brake to close, ensuring passenger safety.

[0022] An electronic device includes a memory and a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the automatic obstacle removal method for the elevator brake feedback switch described in any of the preceding claims.

[0023] A computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the automatic obstacle removal method for the elevator brake feedback switch described above.

[0024] Compared with the prior art, the present invention first controls the normal elevator brake to close, and then controls the abnormal elevator brake to repeatedly close and open. By repeatedly opening the brake, the abnormal contact of the elevator brake feedback switch is resolved. This invention achieves real-time monitoring, intelligent protection and automatic fault clearing of the elevator brake, timely detection and resolution of potential safety hazards in elevator operation, and improves the safety and reliability of elevator operation. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of an automatic obstacle removal system for elevator brake feedback switches.

[0026] Figure 2 This is a flowchart illustrating the automatic fault clearing method for elevator brake feedback switches. Detailed Implementation

[0027] The automatic obstacle removal system and method for elevator brake feedback switch of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0028] Please see Figure 1 This invention discloses an automatic obstacle removal system for elevator brake feedback switches, including a safety signal acquisition module, a safety controller module, and a brake circuit control module. The safety controller module is connected to the safety signal acquisition module, and the brake circuit control module is connected to the safety controller module.

[0029] The safety controller module generates a brake enable signal based on the safety signals acquired by the safety signal acquisition module, and transmits the brake enable signal to the brake circuit control module. The brake circuit control module controls the opening and closing of the elevator brake based on the brake enable signal output by the safety controller module.

[0030] The safety controller module is used to determine when the elevator brake feedback switch action is inconsistent with the elevator brake action, control the traction machine to remain stationary, and trigger the brake clearance mode through the brake circuit control module. During the brake clearance mode, the brake circuit control module first controls the normal brake to remain closed, and then controls the abnormal brake to repeatedly close and open.

[0031] The safety signal acquisition module includes electrical safety switches and brake feedback switches. The electrical safety switches include hoistway safety switches, hall door lock safety switches, car door lock safety switches, car position sensors, and door zone sensors, etc. The brake feedback switch is used to detect the open and closed status of the elevator brake.

[0032] The safety controller module adopts a dual-on / off structure design, including a first safety control unit and a second safety control unit. The first safety control unit generates a brake enable signal based on the safety signals acquired by the safety signal acquisition module and transmits this signal to the brake circuit control module, which then controls the opening and closing of the elevator brake. The second safety control unit determines when the elevator brake feedback switch action and the elevator brake action are inconsistent. In this case, it controls the traction machine to remain stationary via the traction module and triggers the brake clearance mode via the brake circuit control module.

[0033] The brake circuit control module includes a brake power supply circuit and a brake control circuit. The brake power supply circuit supplies power to the brake control circuit based on the brake enable signal output from the safety controller module and detects brake power supply faults. The brake control circuit adopts a dual-switch structure, including a first switch unit and a second switch unit. The first switch unit is used to implement chopper control of the brake module, realizing strong and weak excitation switching and adjustable output functions. The second switch unit is only used for on / off control, adjusting the release time and release noise of the elevator brake by delaying the turn-off of the brake module.

[0034] The safety controller module also includes a PWM controller, which is used to perform timing control on the brake enable signal and can combine different implementation methods of the brake power supply circuit output to achieve different braking control effects.

[0035] Please see Figure 2 The present invention also discloses an automatic obstacle removal method for elevator brake feedback switches, applied to the automatic obstacle removal system for elevator brake feedback switches described in any of the above claims, comprising the following steps:

[0036] When the elevator is running normally, the safety controller module collects elevator safety signals through the safety signal acquisition module. The safety controller module generates a brake enable signal based on the safety signal and transmits the brake enable signal to the brake circuit control module. The brake circuit control module controls the opening and closing operation of the elevator brake based on the brake enable signal to realize the normal operation of the elevator.

[0037] When the safety controller module determines that the elevator brake feedback switch is abnormal through the safety signal, it controls the traction machine to remain stationary and triggers the brake troubleshooting mode. The brake circuit control module first controls the normal brake to remain closed, and then controls the abnormal brake to repeatedly close and open. The abnormal contact of the elevator brake feedback switch is resolved by repeatedly opening the brake.

[0038] The safety controller module includes a first safety control unit and a second safety control unit. The first safety control unit generates a brake enable signal based on a safety signal and transmits the brake enable signal to the brake circuit control module. The second safety control unit determines, based on the safety signal, that when the elevator brake feedback switch action is inconsistent with the elevator brake action, it controls the traction machine to remain stationary and triggers the brake obstacle clearance mode.

[0039] During the brake troubleshooting mode, the second safety control unit first keeps the normal brake closed, then controls the abnormal brake to repeatedly close and open. This repeated opening operation resolves the abnormal contact of the elevator brake feedback switch (microswitch). The first safety control unit continuously monitors the elevator safety signals acquired by the safety signal acquisition module. If the first safety control unit determines that the hoistway safety switch, hall door lock safety switch, and car door lock safety switch are open, the safety controller module forcibly exits the brake troubleshooting mode and controls the elevator brake to close, ensuring passenger safety.

[0040] When any of the safety signal switches in the safety signal acquisition module—the shaft safety switch, the hall door lock safety switch, or the car door lock safety switch—detects an abnormal safety signal, the safety controller module forcibly exits the brake clearance mode and controls the elevator brake to close, ensuring passenger safety. This invention achieves real-time monitoring, intelligent protection, and automatic clearance functions for the elevator brake, promptly identifying and resolving safety hazards during elevator operation, and improving the safety and reliability of elevator operation.

[0041] This invention also discloses an electronic device, including a memory and a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the steps of the automatic obstacle removal method for the elevator brake feedback switch described above. The electronic device of this invention can execute the automatic obstacle removal method for the elevator brake feedback switch of this invention, and can execute any combination of the steps of the method, possessing the corresponding functions and beneficial effects of the method.

[0042] This invention also discloses a computer-readable storage medium storing a computer program. When executed by a processor, the computer program implements the steps of the automatic obstacle removal method for the elevator brake feedback switch described above. The computer-readable storage medium of this invention can execute the automatic obstacle removal method for the elevator brake feedback switch of this invention, and can execute any combination of the method's steps, possessing the corresponding functions and beneficial effects of the method.

[0043] More specific examples of computer-readable media (a non-exhaustive list) include: electrical connections (electronic devices) having one or more wires, portable computer disk drives (magnetic devices), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Furthermore, computer-readable media can even be paper or other suitable media on which programs can be printed, because programs can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in computer memory.

[0044] Various parts of this invention can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, it can be implemented using any of the following techniques known in the art, or a combination thereof: discrete logic circuits having logic gates for implementing logical functions on data signals; application-specific integrated circuits (ASICs) having suitable combinational logic gates; programmable gate arrays (PGAs); field-programmable gate arrays (FPGAs); etc.

[0045] The above description is a detailed description of the preferred embodiments of the present invention. However, the embodiments are not intended to limit the scope of the patent application of the present invention. All equivalent changes or modifications made under the technical spirit disclosed in the present invention should fall within the patent scope covered by the present invention.

Claims

1. An automatic obstacle removal system for elevator brake feedback switches, characterized in that, It includes a safety signal acquisition module, a safety controller module, and a braking circuit control module. The safety controller module is connected to the safety signal acquisition module, and the braking circuit control module is connected to the safety controller module. The safety controller module generates a brake enable signal based on the safety signals acquired by the safety signal acquisition module, and transmits the brake enable signal to the brake circuit control module; the brake circuit control module controls the opening and closing operation of the elevator brake based on the brake enable signal output by the safety controller module. The safety controller module is used to determine when the elevator brake feedback switch action is inconsistent with the elevator brake action, control the traction machine to remain stationary, and trigger the brake clearance mode through the brake circuit control module. During the brake clearance mode, the brake circuit control module first controls the normal brake to remain closed, and then controls the abnormal brake to repeatedly close and open.

2. The elevator brake feedback switch automatic obstacle removal system according to claim 1, characterized in that, The safety signal acquisition module includes electrical safety switches and brake feedback switches. The electrical safety switches include hoistway safety switches, hall door lock safety switches, car door lock safety switches, car position sensors, and door zone sensors. The brake feedback switches are used to detect the open and closed status of the elevator brake.

3. The elevator brake feedback switch automatic obstacle removal system according to claim 1, characterized in that, The safety controller module includes a first safety control unit and a second safety control unit; The first safety control unit is used to generate a brake enable signal based on the safety signal acquired by the safety signal acquisition module, and transmit the brake enable signal to the brake circuit control module. The second safety control unit is used to determine when the action of the elevator brake feedback switch is inconsistent with the action of the elevator brake, control the traction machine to remain stationary, and trigger the brake to clear obstacles.

4. The elevator brake feedback switch automatic obstacle removal system according to claim 1, characterized in that, The brake circuit control module includes a brake power supply circuit and a brake control circuit. The brake power supply circuit supplies power to the brake control circuit according to the brake enable signal. The brake control circuit includes a first switching transistor unit and a second switching transistor unit. The first switching transistor unit is used for chopper control, and the second switching transistor unit is used for on / off control.

5. The elevator brake feedback switch automatic obstacle removal system according to claim 1, characterized in that, The safety controller module also includes a PWM controller, which is used to perform timing control on the brake enable signal.

6. An automatic fault clearing method for elevator brake feedback switch, characterized in that, The automatic obstacle removal system for elevator brake feedback switches according to any one of claims 1 to 5 includes the following steps: When the elevator is running normally, the safety controller module collects elevator safety signals through the safety signal acquisition module. The safety controller module generates a brake enable signal based on the safety signal and transmits the brake enable signal to the brake circuit control module. The brake circuit control module controls the opening and closing operation of the elevator brake based on the brake enable signal to realize the normal operation of the elevator. When the safety controller module determines that the elevator brake feedback switch is abnormal through the safety signal, it controls the traction machine to remain stationary and triggers the brake troubleshooting mode. The brake circuit control module first controls the normal brake to remain closed, and then controls the abnormal brake to repeatedly close and open. The abnormal contact of the elevator brake feedback switch is resolved by repeatedly opening the brake.

7. The automatic fault clearing method for elevator brake feedback switch according to claim 6, characterized in that, The first safety control unit of the safety controller module generates a brake enable signal based on the safety signal acquired by the safety signal acquisition module, and transmits the brake enable signal to the brake circuit control module. The second safety control unit of the safety controller module determines, through safety signals, that when the action of the elevator brake feedback switch is inconsistent with the action of the elevator brake, it controls the traction machine to remain stationary and triggers the brake to clear the obstruction.

8. The automatic fault clearing method for elevator brake feedback switch according to claim 6, characterized in that, During the brake clearance mode, the safety controller module continuously monitors the elevator safety signals collected by the safety signal acquisition module. If any of the shaft safety switch, hall door lock safety switch, or car door lock safety switch is disconnected, the safety controller module will forcibly exit the brake clearance mode and control the elevator brake to close, ensuring passenger safety.

9. An electronic device comprising a memory and a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the automatic obstacle removal method for the elevator brake feedback switch as described in any one of claims 6 to 8.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the automatic obstacle removal method for the elevator brake feedback switch as described in any one of claims 6 to 8.

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