Processing system and method for detecting rotating speed of rotating object

Abstract

The invention relates to a processing system and a method for detecting rotating speed of a rotating object. The processing system comprises a circular photoelectric coded disc and circular PCBs (printed circuit boards), wherein a plurality of light holes are formed at the periphery of the circular photoelectric coded disc; the circular PCBs comprise a plurality of speed sampling units, signal shaping amplification unit and processing units that are electrically connected with one another; the speed sampling units are arranged at the peripheries of the circular PCBs; the signal shaping amplification units are used for shaping and amplifying collected signals into matched signals; the processing units are used for processing the matched signals; a series of pulse signals are generated when the light holes pass through one speed sampling unit; the circular PCBs are connected with the circular coded disc by a bearing; and the pulse signals are only generated in a quarter of cycle when the circular photoelectric coded disc rotates a cycle. According to the system and the method, the rotating speed of the rotating object can be measured in real time with the adoption of multiple photoelectric sensors, the special coded disc and a novel mounting form, and the high precision rotating speed measurement of digital communication is realized.

Description

technical field [0001] The invention relates to the technical field of electrical measurement system manufacturing, in particular to a processing system and method for detecting the rotational speed of a rotating object. [0002] Background technique [0003] The speed sensors used in the field of motor speed measurement include reflective photoelectric pair tube (photoelectric sensor) speed measuring devices, photoelectric code discs, incremental encoders, absolute encoders, tachogenerators and other speed sensors. [0004] The reflective speed sensor is widely used because of its simplest structure and no need to be connected with rotating parts. Usually, because a pulse signal is generated every revolution, the speed test accuracy is not high, the real-time performance is not good, and it is not suitable for low-speed measurement; [0005] The photoelectric code wheel speed sensor is usually integrated in the torque speed sensor. In some teaching motor experiment equipm...

AI Technical Summary

Problems solved by technology

Its measurement accuracy depends on the number of digits output by the sensor. The more digits, the higher the accuracy of speed and position detection. This type of sensor also has the disadvantages of incremental encoders, and the more digits output, the output signal The more signal lines used, the higher the price;

[0008] The speed measurement linearity of the tachogenerator in the full speed measurement range is not easy to achieve, and a special analog conversion module is required to convert the voltage signal of the generator into a speed signal. The temperature change of the motor body will also affect the measurement accuracy of the speed, and the installation is more difficult

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