Strain type wireless sensor

Abstract

The invention discloses a strain type wireless sensor, comprising a strain measuring circuit module, a rotating speed measuring module, a data processing module, a wireless communication module and a power supply module, wherein an internal-arranged strain bridge is connected with a strain sheet which is mounted on an external transmission shaft through a lead wire so as to receive analogue voltage information output by strain bridge resistance variation which is caused by deformation of the strain sheet, and a voltage strain signal is output after the analogue voltage information is processed; the rotating speed measuring module is arranged at a position to be aligned to the rotating speed measuring module, is located in a magnetic field at a static state, and is used for outputting pulse voltage information; the data processing module is used for counting the pulse voltage information received within a time unit and converting the pulse voltage information into rotating speed information; the rotating speed information and a received voltage strain signal are output to the wireless communication module after being packaged; received information is sent in a wireless manner by the wireless communication module; and the power supply module supplies power to the strain measuring circuit module, the rotating speed measuring module, the data processing module and the wireless communication module. With the adoption of the strain type wireless sensor, the torque and the rotating speed can be measured simultaneously.

Description

technical field [0001] The invention relates to sensor technology, in particular to a strain-type wireless sensor. Background technique [0002] The maximum torque and rotational speed are important parameters in the design of rotating mechanical transmission shafts, which are related to the load capacity, life and safety of the transmission shaft. Torque testing technology is widely used in aerospace, aviation, automotive, construction, chemical, machinery and other fields to measure the torque or power of the drive shaft. Whether the torque and speed of the transmission shaft can be measured accurately and in real time is of great significance for timely detection of the faults of the transmission shaft and improvement and optimization of the design of the transmission shaft. [0003] The existing strain-type torque sensor is generally used to measure the torque of the transmission shaft. The technical solution for measuring the torque of the transmission shaft is briefly...

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Problems solved by technology

[0004] It can be seen from the above that the existing strain-type torque sensor can only measure the torque performance of the transmission shaft, but cannot measure the speed of another important parameter of the transmission shaft; furthermore, the strain gauge and the strain bridge composed of built-in In the strain-type torque sensor, for different measurement scenarios, the corresponding strain-type torque sensor is required, which makes the measurement cost higher; moreover, the strain-type torque sensor is connected to the processor through a cable, and the wiring is extremely inconvenient when the transmission shaft rotates

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