Shaft rotating speed precision measuring system in full rotating speed and measuring method

Abstract

The invention provides a shaft rotating speed precision measuring system in a full rotating speed. The measuring system comprises a measuring device, a wire collector, a device main shaft, a couplingand a signal processing module, the measuring device and the wire collector are coaxially fixed to the device main shaft, an output terminal of the wire collector is connected with the signal processing module, the device main shaft is connected with a rotating shaft through the coupling, the device main shaft and the measuring device and the wire collector fixed to the device main shaft are driven to move in the same rotating speed during full-rotating-speed rotation of the rotating shaft, the measuring device converts the measured rotating speed to an analog quantity voltage signal for output, the voltage signal is acquired by the wire collector, and the signal processing module converts the acquired voltage signal to a corresponding measurement rotating speed and displays the measurement rotating speed. According to the system, a shaft rotating speed precision measuring device, method and system in a full rotating speed is provided based on the centrifugal force effect and the piezoelectric effect, the structure of the device is simple, the method is concise and clear, the system design is reasonable, and good measuring performance is achieved for the rotating speed of the rotating shaft in the full rotating speed.

Description

technical field [0001] The invention belongs to the technical field of rotational speed measurement, and in particular relates to a shaft rotational speed precision measurement device system and a measurement method under full rotational speed. Background technique [0002] Speed ​​is an important characteristic parameter in performance testing. The determination of many characteristic parameters of power machinery is inseparable from the functional relationship related to speed. Therefore, speed measurement is a key point in various fields of industrial production. At present, the commonly used speed measurement methods at home and abroad are: Electromagnetic type, Hall type, photoelectric type; the electromagnetic type uses the frequency of the induced current generated by cutting the magnetic field lines of the rotor in the rotating magnetic field, and its measurement results are more accurate, but it is greatly affected by electromagnetic interference; the Hall type uses ...

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Problems solved by technology

[0002] Speed ​​is an important characteristic parameter in performance testing. The determination of many characteristic parameters of power machinery is inseparable from the functional relationship related to speed. Therefore, speed measurement is a key point in various fields of industrial production. At present, the commonly used speed measurement methods at home and abroad are: Electromagnetic type, Hall type, photoelectric type; the electromagnetic type uses the frequency of the induced current generated by cutting the magnetic field lines of the rotor in the rotating magnetic field, and its measurement results are more accurate, but it is greatly affected by electromagnetic interference; the Hall type uses the Hall switch element For measuring the speed, the measurement accuracy depends on the accuracy of the Hall element; the photoelectric method is a non-contact speed measurement method to measure the speed by measuring the frequency or period of the speed signal, but it is very easy to cause torsional vibration of the rotating shaft or Creeping, the orthogonality of the output signal of the photoelectric encoder is destroyed

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