Elevator floor recognition system and method

Abstract

The invention discloses an elevator floor recognition system and method. The elevator floor recognition system comprises a sensor module, an acquisition module and a processing module; the sensor module comprises a magnetic encoder used for marking floor information and a recognizer used for recognizing the marked floor information; the acquisition module is used for acquiring a magnetic signal, generating a PWM signal and outputting the PWM signal; and the processing module is used for processing and analyzing the PWM signal and recognizing the floor information. According to the elevator floor recognition system and the method, the floor is uniquely marked through the magnetic encoder, a magnetoresistive sensor is adopted for recognition, the magnetic encoder is small in size, easy to manufacture and low in price, the floor information is independent, floor staggering is avoided, the influence of power failure on floor recognition is overcome, and the magnetoresistive sensor has theadvantages of being rapid in recognition and not prone to being influenced by the outside. The elevator floor recognition system is convenient to operate and implement, quick in response and suitablefor transformation and popularization of existing elevators.

Description

technical field [0001] The invention relates to the technical field of elevators, in particular to an elevator floor recognition system and method. Background technique [0002] With the pace of China's urbanization process, in addition to commercial office buildings, there are more and more high-rise residential buildings. The significance of elevators as a vertical transportation tool is particularly obvious, and the accurate determination of elevator floors is related to the personal safety of the public. [0003] In the prior art, there are generally several methods for floor identification: (1) Calculate the floor reached by the car by reading the number of turns of the traction machine. Disadvantage: When the "wire rope slipping" system fails, the elevator is prone to accidents. At the same time, the position of the elevator car is determined by adding an encoder device on the accelerator. For example, the Chinese invention patent with the publication number CN10234406...

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Problems solved by technology

[0003] In the prior art, there are generally several methods for floor identification: (1) Calculate the floor reached by the car by reading the number of turns of the traction machine. Disadvantage: When the "wire rope slipping" system fails, the elevator is prone to accidents. At the same time, the position of the elevator car is determined by adding an encoder device on the accelerator. For example, the Chinese invention patent with the publication number CN102344063A discloses an absolute encoder system installed on the speed limiter. The position of the elevator car is confirmed by the fixed connection between the wire rope of the sensor and the car. Disadvantages: This method needs to add an absolute encoder to the existing elevator system, and its cost is relatively high; and when the elevator is powered off, the encoder The function will be invalid, and the problem of split layer cannot be solved, and it is difficult to install the encoder, and the maintenance and replacement are inconvenient

[0004] (2) identify the floor by weight acceleration, as the Chinese utility model patent with the notification number CN208361622U discloses a kind of elevator floor acquisition device, when the floor is higher, the sensor is required to be higher, and at the same time, the gravity sensor has poor adaptability to the environment, and the floor When confusion occurs, the nearby floor cannot be stopped in time, and the floor information cannot be obtained when the power is off.

Infrared sensors have environmental requirements, and the cost of improving the floor information of steel strips is too high. Infrared technology products are directional, and the transmitter must be aligned with the receiver, and there must be no obstacles in the middle

[0006] In addition, some studies have proposed to use magnetic strips and electromagnetic devices to install radio frequency devices on the top or bottom floor as an auxiliary floor verification, but the specific floor is determined according to the counter, that is, there is an interdependent relationship between floors. Once the elevator is powered off If there is a fault or system disorder, the system needs to reposition the position of the car, and the calibration can only be performed after the car returns to the top floor or the bottom floor, and the work efficiency and safety are not high

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