A method for automatically detecting the direction of an encoder when an elevator control system is stationary

Abstract

The invention discloses a method for automatically detecting a direction of a coder during a static process of an elevator control system. The method comprises the following specific steps of: (1) resetting a counter of the coder by a control system when a motor of an elevator brake is turned on and the elevator brake is in a static state; (2) setting certain torque current of the motor by control system software, generating relative rotary acting force between the motor and the brake, and under the action of the rotary acting force, enabling materials of the brake and connecting parts thereof to generate fine elastic deformation as a result of a manufacturing process and materials of the brake and the connecting parts thereof; and (3) judging a correct direction of the coder according to a plus and minus sign of an existing pulse counter and a rotary direction of set current, thereby realizing the function of automatically detecting the direction of the coder by the control system under the static state that the elevator brake is not turned on. By virtue of the function, the system enables debugging to be simpler and easier to use, so that debugging time is shortened, occurrence of accidents is reduced, damage on equipment is reduced, and stability of the system is improved.

Description

technical field [0001] The invention relates to a method for automatically detecting the direction of an encoder, in particular to a method for automatically detecting the direction of an encoder when an elevator control system is stationary. Background technique [0002] An encoder is a device that compiles and converts a signal (such as a bit stream) or data into a signal form that can be used for communication, transmission, and storage. The encoder converts angular displacement or linear displacement into an electrical signal, the former is called a code disc, and the latter is called a yardstick. According to the readout method, the encoder can be divided into two types: contact type and non-contact type; according to the working principle, the encoder can be divided into two types: incremental type and absolute type. The incremental encoder converts the displacement into a periodic electrical signal, and then converts the electrical signal into a counting pulse, and u...

AI Technical Summary

Problems solved by technology

[0003] When the elevator is commissioned, it is necessary to set the motor parameters, obtain the encoder parameters and the encoder direction. The current elevator control system mainly uses the static tuning method when setting the motor parameters. The encoder direction can only be confirmed after manually running the elevator. If the encoder is wrong, There will be danger of elevator speeding, which will easily cause damage to the equipment

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