A Calibration Method of Absolute Position Signal of Hybrid Photoelectric Encoder

Abstract

The invention discloses an absolute position signal calibration method of a hybrid photoelectric encoder. The system adopted includes a microprocessor and a power supply module. The input terminal of the microprocessor is connected with a photoelectric encoder signal conditioning circuit, and the photoelectric encoder signal conditioning circuit The input end of the circuit is connected with the output end of the hybrid photoelectric encoder, the output end of the microprocessor is connected with a three-phase power driver, and the servo motor is connected with the output end of the three-phase power driver; the method comprises steps: 1. The encoder and the servo motor are coaxially installed; 2. The hybrid photoelectric encoder detects the absolute position signal and the relative position signal of the servo motor rotation, and the microprocessor uses the relative position signal of the servo motor rotation to correct the absolute position signal. The invention has reasonable design, convenient realization and low cost, convenient use and operation, high calibration efficiency, saves manpower and material resources, strong practicability, good use effect, and is convenient for popularization and use.

Description

technical field [0001] The invention belongs to the technical field of encoder absolute position signal calibration, and in particular relates to an absolute position signal calibration method of a hybrid photoelectric encoder. Background technique [0002] In the field of servo motor control, in order to accurately control the position or speed and improve the control performance of the servo motor, it is often necessary to know the initial position of the rotor and the position and speed information during operation, which can be obtained by installing a rotor position sensor. Among them, the incremental photoelectric encoder with absolute position information U, V, W has the characteristics of initial positioning information, high position recognition accuracy, and moderate price, and is widely used in the field of motor rotor position and speed detection that requires initial positioning information. For hybrid photoelectric encoders, the accuracy of general absolute pos...

AI Technical Summary

Problems solved by technology

[0003] Like other types of sensors, there are deviations in both the absolute position signal and the relative position signal in the hybrid photoelectric encoder. Due to the low accuracy of the absolute position signal and the large deviation range, this has a great impact on the starting performance of the servo motor; When absolute position signals are used for position and speed monitoring or control in operation control, corresponding errors will also be introduced, which will affect the control performance of the servo system

Therefore, it is necessary to calibrate and calibrate the absolute position signal. At present, the absolute position signal of the hybrid photoelectric encoder is calibrated by the manufacturer, and the user has no effective way to calibrate.

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