Torque and temperature multi-parameter sensing device based on fiber bragg grating

Abstract

The invention discloses a torque and temperature multi-parameter sensing device based on a fiber bragg grating. The torque and temperature multi-parameter sensing device comprises a controller, an optical torque and temperature sensor, an optical signal sensing system, a computer and a block body, the controller applies a variable load to the tested motor; the optical torque and temperature sensor is a sleeve tightly wound with a fiber grating, one end of the sleeve is connected with a motor stator, and the other end of the sleeve is connected with a stable block; the fiber bragg grating comprises a stress monitoring fiber bragg grating and a temperature monitoring fiber bragg grating; the optical signal sensing system comprises a light source and a signal receiving device, and is used for converting the stress change and the temperature change of the surrounding environment into the change of optical information. According to the invention, the variable load can be applied to the tested motor to measure the applied torque, the rotating speed and the mechanical power can be obtained by combining the rotating speed sensor, the temperature change of the tested motor can be obtained at the same time by using the sensitive characteristic of the fiber bragg grating to the temperature, the torque measurement error caused by the temperature influence is compensated, and the measurement precision is further improved.

Description

technical field [0001] The invention relates to the field of dynamometers, in particular to a torque sensing device based on stress measurement of a stator. Background technique [0002] With the development of industrialization, the application of motors can be seen in various fields. Therefore, the performance of motors needs to be strictly tested. At present, parameters such as torque, speed and power are more tested for motors. [0003] The traditional test of the motor is mainly to determine the power by testing the output torque of the motor rotor and combining the speed. When the torque is input on the shaft, the motor stator will have a counter torque. Therefore, it is generally convenient and convenient to use a scale and a lever arm mounted on the stator. The stator torque can be accurately measured, and the mechanical power can be calculated if the rotational speed is measured at the same time. This method can integrate load and test. The speed test is relatively...

AI Technical Summary

Problems solved by technology

This method can integrate load and test. The speed test is relatively simple, but the current torque measurement accuracy is not enough. A new dynamometer system needs to be proposed to improve the torque measurement accuracy.

Moreover, in practical applications (such as automobile engine engines), there are usually temperature fluctuations, which will seriously affect the performance of the sensor. Therefore, it is useful to propose a multi-parameter sensing device that can monitor both system torque and system temperature. Practical

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