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增量式光电编码器输出信号的正交性和均匀性是其重要技术指标之一,对增量式光电编码器的精度检测是编码器研制和生产过程中的重要环节。传统信号质量的检测是基于时间位置进行检测的,其检测准确度受转速均匀度影响,在高速、变速转动下对增量式光电编码器的动态性能检测并不准确。提出了一种基于空间位置的信号质量检测方法,并设计了相应的检测系统。检测系统采用直流无刷电机带动高精度角脉冲发生器和被检增量式编码器同轴旋转,并采集高精度角脉冲发生器在被检增量式编码器输出信号边沿时刻的数值,进行误差计算。该检测系统极大地减小了由于转速不均匀造成的测量不准确度。运用该检测系统对输出脉冲周期数为32 400的增量式编码器进行检测,并与时间位置检测法进行对比实验。实验结果表明:该检测系统检测结果不受电机转速变化的影响,可有效地提高检测精度及检测效率,能够实现动态检测。该系统的研制为批量生产增量式光电编码器提供了极大的便捷。
The orthogonality and uniformity of the incremental optical encoder output signal is one of its important technical indicators. The detection of the accuracy of the incremental optical encoder is an important part in the development and production of the encoder. The detection of traditional signal quality is based on the time position detection, the detection accuracy is affected by the speed uniformity, and the dynamic performance detection of the incremental photoelectric encoder is not accurate at high speed and variable speed rotation. A signal quality detection method based on spatial location is proposed and a corresponding detection system is designed. The detection system uses the DC brushless motor to drive the high-precision angle pulse generator and the incremental encoder to be inspected for coaxial rotation, and acquires the value of the high-precision angle pulse generator at the edge of the output signal of the incremental encoder being seized Error calculation. The detection system greatly reduces the measurement inaccuracy due to uneven speed. The detection system is used to detect the incremental encoder whose output pulse period is 32 400, and compared with the time position detection method. The experimental results show that the detection results of the detection system are not affected by the change of motor speed, which can effectively improve the detection accuracy and detection efficiency and achieve dynamic detection. The development of the system provides a great convenience for mass production of incremental optical encoder.