Elevator control method and system

Abstract

The invention relates to an elevator control method and system. The method comprises the following steps: learning position data of each floor by collecting a pulse signal fed back by an encoder mounted on a traction machine; learning the position data of each floor by collecting a pulse signal fed back by an encoder mounted on a speed limiter; collecting real-time position data of each floor according to the pulse signal fed back by the encoder on the traction machine; collecting the real-time position data of each floor according to the pulse signal fed by the encoder on the speed limiter; comparing the two pieces of real-time position data one by one and acquiring steel wire rope slip data according to the comparison result; setting a first set range and a second set range according tothe learned two pieces of position data, and sending out an alarm signal when the steel wire rope slip data exceeds the first set range but not stopping operation of an elevator; and when the steel wire rope slip data exceeds the second set range, stopping operation of the elevator. The operating state of the elevator can be controlled by adopting two encoders, so that the operating reliability ofthe elevator can be further improved.

Description

technical field [0001] The present invention relates to elevator control, in particular to a reliable elevator control method and system. Background technique [0002] Both the closed-loop vector control of the elevator traction machine and the elevator position control based on distance control rely on pulse detection devices, usually encoders, including photoelectric encoders and resolvers. Whether it is a split control device that separates the traction machine drive from the elevator control, or the current popular elevator integrated controller that integrates the motor drive and elevator control, the pulse is usually obtained from the encoder installed on the elevator traction machine. To complete the traction machine drive control and elevator position control. [0003] However, due to the slipping of the steel wire rope, there will be a deviation between the elevator position calculated based on the pulse feedback from the encoder installed on the traction machine a...

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Problems solved by technology

[0003] However, due to the slipping of the steel wire rope, there will be a deviation between the elevator position calculated based on the pulse feedback from the encoder installed on the traction machine and the actual elevator position, which will cause inaccurate elevator leveling. normal operation of

Chinese patent application publication numbers CN 105460724 A and CN 105967017 A disclose a wire rope slippage detection method calculated based on an encoder installed on an elevator traction machine, but it is difficult to ensure the accuracy of the detection benchmark data and the measured quantity of these methods; Moreover, these methods can only complete the detection of wire rope slippage at a specific position of the elevator, and cannot detect the amount of slippage in a timely manner.

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