CN-122009933-A - Monitoring method, device and equipment for traction machine band-type brake state and storage medium

CN122009933ACN 122009933 ACN122009933 ACN 122009933ACN-122009933-A

Abstract

The invention provides a monitoring method, a device, equipment and a storage medium for the brake state of a tractor, belonging to the technical field of elevators; and in response to the elevator stop operation instruction, determining that the band-type brake is in a closed effective state if the number of the detected encoder pulses in a preset second time window is lower than a second set threshold value. According to the invention, redundancy monitoring based on encoder pulses is added on the basis of a physical micro-switch, a time window and a threshold value are respectively set in starting and stopping stages to judge the state of the band-type brake, so that the misoperation of the switch caused by small mechanical travel and expansion and contraction is reduced, and the sudden stop and the trapped fault of the elevator are reduced.

Inventors

LIU ZHEN
GUO YAO
RONG HONGKAI
YANG FAN
HUANG LIMING

Assignees

日立楼宇技术（广州）有限公司

Dates

Publication Date: 20260512
Application Date: 20260403

Claims (10)

1. The monitoring method of the traction machine band-type brake state is characterized by comprising the following steps: acquiring the pulse number of an encoder of an elevator traction machine; Responding to an elevator starting operation instruction, and determining that the band-type brake is in an effective opening state if the number of encoder pulses detected in a preset first time window exceeds a first set threshold value; And responding to an elevator stop operation instruction, and if the number of the detected encoder pulses in a preset second time window is lower than a second set threshold value, determining that the band-type brake is in a closed effective state.
2. The method according to claim 1, characterized in that the first set threshold value and/or the second set threshold value are dynamically set in accordance with at least one parameter of the rated speed, load weight, real-time speed profile of the elevator.
3. The method of claim 1, wherein the determining that the band-type brake is in an open active state further comprises: Acquiring a current change trend of a motor; If the current of the motor is reduced from the locked rotor current to a normal starting current range and the number of encoder pulses detected in a preset first time window exceeds a first set threshold, the band-type brake is determined to be in an open effective state.
4. A method according to claim 3, further comprising: Monitoring response time length for the current of the motor to drop from the locked rotor current to a preset normal starting current range in each brake opening process; and determining the aging degree of the band-type brake spring or the abrasion degree of the brake shoe according to the change trend of the response time.
5. The method as recited in claim 1, further comprising: Monitoring a time interval from the start operation instruction of the elevator to the first exceeding of the encoder pulse number by a first set threshold value in each contracting brake opening process; and determining the aging degree of the band-type brake spring or the abrasion degree of the brake shoe according to the change trend of the time interval.
6. The method of any one of claims 1-5, further comprising: monitoring the current fluctuation amplitude of the motor in the elevator constant-speed operation stage; If the current fluctuation amplitude is detected to exceed the preset threshold value and the fluctuation amplitude of the number of encoder pulses detected in a plurality of continuous third time windows relative to the theoretical number of pulses corresponding to the rated rotation speed does not exceed the preset percentage, judging that a brake dragging fault exists in which the brake is not fully opened.
7. The method of any one of claims 1-5, further comprising: after the elevator stops running and the frequency converter stops outputting, monitoring the current of the motor; If the continuously existing residual current is detected and the pulse number of the encoder is not zero, the fault that the band-type brake is not tightly closed is judged.
8. Monitoring device of hauler band-type brake state, its characterized in that includes: the data acquisition module is used for acquiring the pulse number of the encoder of the elevator traction machine; the first response module is used for responding to an elevator starting operation instruction, and determining that the band-type brake is in an effective opening state if the number of encoder pulses detected in a preset first time window exceeds a first set threshold value; And the second response module is used for responding to the elevator stop operation instruction, and determining that the band-type brake is in a closed effective state if the number of the detected encoder pulses in the preset second time window is lower than a second set threshold value.
9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements a method of monitoring the status of a traction machine brake as defined in any one of claims 1-7.
10. A computer readable storage medium storing a computer program, characterized in that the computer program, when executed by a processor, implements the method of monitoring the brake status of a hoisting machine according to any one of claims 1-7.

Description

Monitoring method, device and equipment for traction machine band-type brake state and storage medium Technical Field The invention belongs to the technical field of elevators, and particularly relates to a monitoring method, a device, equipment and a storage medium for the brake state of a traction machine. Background The elevator band-type brake micro-switch monitors the state of the brake through instantaneous mechanical action, and ensures the safe operation of the elevator. At present, an elevator traction machine monitors falling and opening of a band-type brake through a band-type brake micro-switch, if an elevator starts to operate, the band-type brake micro-switch is effectively fed back, the elevator reaches a destination floor, the traction machine starts to decelerate, the band-type brake falls down after zero speed is reached, a frequency converter stops outputting, and the band-type brake micro-switch is invalid in feedback. In practical application, the validity of the band-type brake micro-switch is judged according to the logic, and if the validity of the band-type brake micro-switch is not consistent with the setting logic, the fault is detected after the setting time is continued. In practical application, the band-type brake stroke is very small, generally only about 0.4mm, when the band-type brake stroke adjustment or the shake of a motor in the elevator operation process occurs, the band-type brake micro-switch is frequently caused to malfunction, the elevator is suddenly stopped, the normal operation of the elevator is influenced, and the problems of trapping people and the like are caused. Disclosure of Invention In view of the above, the present invention provides a method, apparatus, device and storage medium for monitoring the status of a traction machine band-type brake, which are used for improving the accuracy of monitoring the status of the traction machine band-type brake. The first aspect of the invention provides a monitoring method for the state of a traction machine band-type brake, which comprises the following steps: acquiring the pulse number of an encoder of an elevator traction machine; Responding to an elevator starting operation instruction, and determining that the band-type brake is in an effective opening state if the number of encoder pulses detected in a preset first time window exceeds a first set threshold value; And responding to an elevator stop operation instruction, and if the number of the detected encoder pulses in a preset second time window is lower than a second set threshold value, determining that the band-type brake is in a closed effective state. The second aspect of the invention provides a monitoring device for the state of a traction machine band-type brake, comprising: the data acquisition module is used for acquiring the pulse number of the encoder of the elevator traction machine; the first response module is used for responding to an elevator starting operation instruction, and determining that the band-type brake is in an effective opening state if the number of encoder pulses detected in a preset first time window exceeds a first set threshold value; And the second response module is used for responding to the elevator stop operation instruction, and determining that the band-type brake is in a closed effective state if the number of the detected encoder pulses in the preset second time window is lower than a second set threshold value. A third aspect of the present invention provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the monitoring method of the traction machine band-type brake state according to the first aspect when executing the computer program. A fourth aspect of the present invention provides a computer readable storage medium storing a computer program which, when executed by a processor, implements the method for monitoring a brake status of a hoisting machine according to the first aspect. Compared with the background technology, the embodiment of the invention has the following beneficial effects: The invention adopts the pulse number of the encoder to judge the band-type brake state, and is based on the basic principle that the band-type brake must be opened before the elevator is started, the traction machine can rotate, and the band-type brake must be closed when the elevator is stopped, and the traction machine stops rotating. Therefore, the rotation state of the traction machine and the actual state of the band-type brake have a definite corresponding relation, namely, the encoder pulse can represent the rotation state of the traction machine, so that the influence of the micro-switch on the monitoring reliability is avoided in principle. Specifically, in response to an operation starting instruction, if the number of encoder pulses detected in a preset first time window exceeds a first set thr