CN104444682B - Method for detecting and predicating elevator landing door lock fault - Google Patents

Abstract

The invention discloses a method for detecting and predicting the failure of elevator landing door locks. A resistance detection module for detecting the resistance value of the landing door lock contacts is integrated on the control board of each landing station call device. A resistance detection module detects the resistance value of the landing door lock contact on each floor and transmits the detected resistance value of the landing door lock contact to the elevator control system through the landing call device and the original communication system of the elevator control system , The elevator control system monitors the resistance value of the landing door lock contact of each floor in real time, and makes a corresponding fault judgment when the resistance value of the landing door lock contact deviates from the normal value. The invention has the beneficial effects of avoiding some faults that require long-term follow-up to find out, saving labor costs and improving maintenance efficiency.

Description

A method for detecting and predicting faults of elevator landing door locks

technical field

The invention relates to the technical field of elevator fault detection methods, in particular to a method for detecting and predicting faults of elevator landing door locks.

Background technique

While elevators bring convenience to people, there are also many hidden dangers. There are many types of elevator failures. At present, during the use of elevators, door lock failure is a relatively important failure, which is closely related to the safe operation of elevators. The contacts of the door locks are basically inspected manually, and it is difficult to find out the upcoming faults in advance. When the door locks fail, because the contacts of the door locks of the landing doors are all connected in series, each floor door It will be time-consuming and labor-intensive to check the door lock.

To this end, the Chinese patent No. 201220356852.0 discloses a fast identification system for elevator faulty door locks, which includes car door lock switches and door lock contactors on each floor of the elevator to form a series circuit, and each car on the series circuit The door lock switch is connected to the address sub-module through the power signal acquisition line, and each address sub-module is connected to the main address module through 485 module transmission. The system uses the address sub-module to judge which layer of door locks fails, which improves the efficiency of maintenance. However, the cost of adding address sub-modules and total address modules at each layer is relatively high, and the system can only detect faulty door locks, but cannot predict door lock failures.

For another example, the Chinese patent No. 201220356851.6 discloses a collection and analysis system for elevator difficult faults, which is characterized in that: each signal control point in the elevator control cabinet is connected to the collection line, respectively connected to the data processor, and the data processor processes Afterwards, the network sending module is connected to the client in the monitoring room to collect the voltage and current signals of each signal control point in the elevator control cabinet, and judge whether a fault occurs through the on-off of the signal. The system judges whether a fault occurs through the on-off of the voltage and current signals of each signal control point, and the system cannot predict the fault of the door lock.

For this reason, the applicant has conducted useful explorations and attempts, and has found a method that can detect and predict landing door lock failures. The technical solution to be introduced below is produced under this background .

Contents of the invention

The technical problem to be solved by the present invention is to provide a method for detecting and predicting the failure of elevator landing door locks in view of the existing technical deficiencies. The method detects the failure in real time by detecting the resistance value of each floor door lock contact , and the change trend of the resistance value of the door lock of each floor is used to predict the fault of the door lock contact.

The technical problem solved by the present invention can adopt following technical scheme to realize:

A method for detecting and predicting failures of elevator landing door locks. A resistance detection module for detecting the resistance value of the landing door lock contacts is integrated on the control board of each floor station call device. Each resistance detection module Detect the resistance value of the landing door lock contact on each floor and transmit the detected resistance value of the landing door lock contact to the elevator control system through the landing call device and the original communication system of the elevator control system. The elevator control system Monitor the resistance value of the landing door lock contact on each floor in real time, and make corresponding fault judgments when the resistance value of the landing door lock contact deviates from the normal value.

In a preferred embodiment of the present invention, each resistance detection module is an AD conversion module, the landing door lock contact is connected in series with the reference resistor, the voltage drop on the landing door lock contact is used as the input of the AD conversion module, and the reference resistor The voltage drop on the ground is connected to the reference of the AD conversion module, and the AD conversion module measures the resistance value of the landing door lock contact according to the voltage drop on the landing door lock contact and the voltage drop on the reference resistor.

In a preferred embodiment of the present invention, each landing call device has an independent ID number, and can independently return the landing door lock contacts detected by the resistance detection module in the landing call device on the current floor The resistance value of the current floor and the call signal of the current floor are sent to the elevator control system, and the elevator control system monitors the resistance value of the landing door lock contact of the current floor in real time. When the resistance value of the landing door lock contact of the current floor deviates from When the value is normal, make a corresponding fault judgment on the landing call device of the current floor.

In a preferred embodiment of the present invention, a logic unit is configured in the elevator control system, and the logic unit collects the resistance value of each landing door lock contact on each floor, and passes through the landing door door of each floor. The changing trend of the resistance value of the lock contact predicts the landing door lock that may fail.

In a preferred embodiment of the present invention, the logic unit is also provided with a threshold value range of the normal resistance value of the landing door lock contact, when the resistance value of the landing door lock contact exceeds the threshold value of the normal resistance value When within the range, the elevator control system will issue a door lock warning prompt.

In a preferred embodiment of the present invention, the elevator control system detects whether the landing door lock circuit formed by the series connection of each landing door lock is in the same state as the contact of each landing door lock. , When the landing door lock contact is abnormal or the landing door lock circuit is abnormal, when the landing door lock contact is normal, the elevator control system can detect the corresponding fault.

Due to the adoption of the above technical solution, the beneficial effect of the present invention is that: through the feature that each floor of the elevator will be equipped with a landing call device, a resistance detection module is integrated on each floor call device to independently detect the current floor Add the resistance value data of the landing door lock contact of the current floor to the communication signal returned by the elevator calling device at each floor, and transmit it to the elevator control system through the internal communication bus. The elevator control system determines the working status of the floor door locks by judging the resistance value of the door lock contacts of each floor, avoiding the problem that some faults need to be followed up for a long time to find out, saving labor costs and improving maintenance efficiency. At the same time, by judging the change trend of the resistance value of each floor door lock, through its built-in logic unit, it can predict the floor door locks that may be faulty in advance, thereby achieving the purpose of greatly reducing the failure rate of elevator door locks.

detailed description

In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further elaborated.

A method for detecting and predicting the failure of elevator landing door locks according to the present invention is based on the original elevator control system and the landing call device of each floor, wherein the elevator control system uses RS-485 interface or other communication The method communicates with the landing call device on each floor, and the landing call device on each floor transmits the call signal to the elevator control system, and the elevator control system will feed back the response information and display the information to the corresponding landing In the calling device.

A resistance detection module for detecting the resistance value of the landing door lock contact is integrated on each landing call device. The resistance detection module is an AD conversion module. The landing door lock contact is assumed to be a resistance R, and the resistance R It is connected in series with the reference resistor R0, the voltage drop on the resistor R is used as the input of the AD conversion module, the voltage drop on the reference resistor R0 is connected to the reference of the AD conversion module, and the AD conversion module is based on the voltage drop on the resistor R and the voltage drop on the reference resistor R0 The resistance value of the resistor R measured by the voltage drop is the resistance value of the landing door lock contact. The landing call device returns the resistance value of the landing door lock contact measured by the resistance detection module and the call signal of the current floor to the elevator control system, and the elevator control system monitors the landing call device on each floor in real time The incoming resistance detection module detects the resistance value of the landing door lock contact and the call signal of the current floor. When the resistance value of the landing door lock contact deviates from the normal value, a corresponding fault judgment is made.

Each landing call device has an independent ID number, and can independently return communication signals to the elevator control system. The communication signal includes the landing door lock contact detected by the resistance detection module in the landing call device on the current floor. Point resistance value and the call signal of the current floor, the elevator control system monitors the resistance value of the landing door lock contact of the current floor in real time, when the resistance value of the landing door lock contact of the current floor deviates from the normal value , to make a corresponding fault judgment on the landing call device of the current floor.

The elevator control system is equipped with a logic unit, which collects the resistance value of each landing door lock contact on each floor, and through the change trend of the resistance value of the landing door lock contact on each floor, Predicts which landing door locks are likely to fail. In addition, the logic unit is also provided with a threshold value range of the normal resistance value of the landing door lock contact. When the resistance value of the landing door lock contact exceeds the threshold value range of the normal resistance value, the elevator control system will issue a door lock warning. The reminder is convenient for people to observe, and the landing door lock that may fail can be replaced in advance.

The elevator control system detects whether the landing door lock circuit formed by the series connection of each floor door lock is in the same state as the contact of each floor door lock. When the landing door lock circuit is normal and the landing door lock contact is abnormal or When the landing door lock circuit is abnormal and the landing door lock contact is normal, the elevator control system can detect the corresponding fault.

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments. What are described in the above-mentioned embodiments and the description only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have Variations and improvements are possible, which fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (4)

1. it is a kind of detection and predict elevator landing door lock failure method, it is characterised in that in the control of each landing call device One is integrated with making sheet is used for the resistance detection module of resistance value of detection layers door lock contact, each resistance detection module detection The resistance value of the layer door lock contact of respective floor is simultaneously filled the resistance value of the layer door lock contact for detecting by landing call Put and pass to apparatus for controlling elevator with the communication system of apparatus for controlling elevator script, each floor of apparatus for controlling elevator monitor in real time The resistance value of layer door lock contact, when the resistance value of layer door lock contact deviates normal value, makes corresponding breakdown judge；

Logical block is configured with apparatus for controlling elevator, the logical block gathers the layer door lock contact of each floor and passes each time Resistance value when returning, by the variation tendency of the resistance value of the layer door lock contact of each floor, predicts it may happen that event The layer door lock of barrier；

The logical block is additionally provided with a layer threshold range for the normal resistance values of door lock contact, when the electricity of layer door lock contact When resistance exceeds the threshold range of the normal resistance values, apparatus for controlling elevator sends door lock early warning.

2. the method for detecting as claimed in claim 1 and predicting elevator landing door lock failure, it is characterised in that each resistance inspection Survey module is AD conversion module, and layer door lock contact is connected with reference resistance, and the pressure drop on layer door lock contact is used as AD conversion The input of module, the pressure drop on reference resistance is connected to the benchmark of AD conversion module, and AD conversion module is according on layer door lock contact Pressure drop and reference resistance on pressure drop measure a layer resistance value for door lock contact.

3. the method for detecting as claimed in claim 1 and predicting elevator landing door lock failure, it is characterised in that each stop is exhaled Ladder device has independent No. ID, and resistance detection module that can be in the landing call device of independent backtransmission current floor is measured Layer door lock contact resistance value and the current floor calling signal to apparatus for controlling elevator, apparatus for controlling elevator is supervised in real time The resistance value of the layer door lock contact of the current floor is controlled, when the resistance value of the layer door lock contact of the current floor deviates normal During value, corresponding breakdown judge is made to the landing call device of the current floor.

4. the method for detecting as claimed in claim 1 and predicting elevator landing door lock failure, it is characterised in that elevator controlling system Whether system detection is consistent state by each layer of door lock layer door lock loop in series and each layer of door lock contact, when Layer door lock loop is normal, when layer door lock contact is abnormal or the exception of layer door lock loop, when layer door lock contact is normal, and electricity Terraced control system can detect corresponding failure.