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Incremental encoder A and B phase signal line disconnection detection system and method

An incremental encoder and disconnection detection technology, applied in the direction of instruments, measuring electronics, measuring devices, etc., can solve the problems of not fully utilizing the computing power of the controller chip, increasing the cost and complexity of hardware circuits, and achieving optimized hardware Effects of circuit design, complexity reduction, and usage reduction

Pending Publication Date: 2019-12-31
TIANJIN ZHONGKE HUAYING TECH CO LTD
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Problems solved by technology

This method increases the cost and complexity of the hardware circuit, and does not fully utilize the computing power of the controller chip

Method used

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  • Incremental encoder A and B phase signal line disconnection detection system and method
  • Incremental encoder A and B phase signal line disconnection detection system and method

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Embodiment Construction

[0023] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0024] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0025] One embodiment of the present invention: a method for detecting disconnection of phase A and B phase signal lines of an incremental encoder, comprising the following content:

[0026] 1) Convert the A and B phase output signals HALL-A and HALL-B of the incremental encoder into 4 signals, respectively Hall-A-DSP, Hall-B-DSP, Hall-D-DSP, Hall- E-DSP, the two signals Hall-A-DSP and Hall-D-DSP are the same as the input signal HALL-A, and the other two signals Hall-B-DSP and Hall-E-DSP are the same as the input signal HALL-B;

[0027] 2) Connect the signal Hall-D-DSP to the GPIO module of the microcontroller to realize speed measurement, and connect the signal Hall-E-DSP signal to the...

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Abstract

The invention provides an incremental encoder A and B phase signal line disconnection detection system. The system comprises a multi-way bus transceiver and a microcontroller. A and B phase output signals Hall-A and HALL-B of an incremental encoder pass through the multi-way bus transceiver, and then four ways of signals comprising Hall-A-DSP, Hall-B-DSP, Hall-D-DSP and Hall-E-DSP are generated. Two ways of signals comprising the Hall-A-DSP and the Hall-D-DSP are the same as the input signal Hall-A. The other two ways of signals comprising the Hall-B-DSP and the Hall-E-DSP are the same as theinput signal Hall-B. The signal Hall-D-DSP is connected with a GPIO module of the microcontroller, thereby realizing velocity measurement. The signal Hall-E-DSP is connected with an ECAP module of themicrocontroller, thereby realizing the velocity measurement. The signal Hall-A-DSP and the signal Hall-B-DSP are connected with EQEP1A and EQEP1B of an EQEP module of the microcontroller, thereby realizing the velocity measurement. According to the system, through utilization of peripheral resources of a control chip, use of an external hardware circuit is reduced, cost is reduced, circuit designcomplexity is reduced, and a hardware circuit design is optimized on the premise of finishing fault detection. the system is very applicable to mere consideration of incremental encoder A and B phasedisconnection fault detection.

Description

technical field [0001] The invention belongs to the technical field of motor detection, and in particular relates to a system and method for detecting disconnection of phase A and B signal lines of an incremental encoder. Background technique [0002] In the motor control system, it is often necessary to measure the speed of the motor in real time. The incremental encoder has the advantages of high precision and good anti-interference. Using the orthogonal characteristics of its A and B signal lines, the speed can be realized. Calculation is currently widely used in motor speed measurement systems. However, in the actual operation process, due to loose connection terminals or internal faults of the encoder, the A and B signal lines output by the encoder may be disconnected, resulting in errors in speed measurement, affecting the operation of the motor, and even causing safety accidents. Especially when only one of the two signal lines A and B is broken, the speed measuremen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/02
Inventor 琚龙赵贺刘杰张立伟
Owner TIANJIN ZHONGKE HUAYING TECH CO LTD
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