Pulse time-based rotating speed measuring system

Abstract

The invention relates to a pulse time-based rotating speed measuring system, which belongs to the technical field of mechanical rotating shaft speed measurement, and is used for measuring a rotating speed of a measured shaft of a belt gear or a through hole. The pulse time-based rotating speed measuring system is characterized in that a pulse generator disposed on one side of the gear or the through hole; the pulse generator is a Hall switch or a proximity switch or a correlation type photoelectric switch; during the rotating process of the measured shaft, when the gear or the through hole passes by the pulse generate, the pulse generator is used to generate pulse signals, which are consisted of high and low levels; a controller used for receiving the pulse signals and calculating the rotating speed according to the pulse signals is provided; and a timer is arranged in the controller. According to the invention, measures are taken from the aspect of the rotating speed testing mode, therotating speed is measured through a switch quantity sensor with mature technology, and the high-precision rotating speed can be acquired by reasonably setting a pulse interval time constant t underthe state of stable rotating speed, so that the high-precision rotating speed measuring device can be widely used for automatic testing systems of engines, gearboxes, drive axles and the like.

Description

technical field [0001] The invention belongs to the technical field of speed measurement of mechanical rotating shafts, and in particular relates to a speed measurement system based on pulse time. Background technique [0002] With the continuous improvement of my country's manufacturing level, quality tests must be carried out on components such as engines and gearboxes before they leave the factory. Only after the equipment has passed the inspection can they leave the factory. The speed measurement is a key indicator, and the measurement accuracy is very high. , in order to meet the accuracy requirements of rotational speed measurement, the existing gearbox automatic test system adopts the method of measuring pulse frequency to measure. This method requires the sensor under test to be able to send a large number of pulses to meet the measurement accuracy requirements, such as encoders, etc., but there are many shortcomings in the use of encoders. In terms of installation, t...

AI Technical Summary

Problems solved by technology

This method requires the sensor under test to be able to send a large number of pulses to meet the measurement accuracy requirements, such as encoders, etc., but there are many shortcomings in the use of encoders. In terms of installation, there are requirements for connection mode and coaxiality, and it is very inconvenient. In terms of signals, since the measurement accuracy of the encoder is mainly guaranteed by the number of subdivided pulses of the code disc, high-precision speed measurement requires a high number of subdivided pulses of the code disc, and a high number of subdivided pulses of the code disc requires a speed measurement board The card must have the ability of high-speed pulse acquisition, which requires high requirements for the measurement board

At the same time, the system cost increases

It can no longer meet the needs of today's automated test systems for engines, gearboxes, etc.

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