Wireless device for measuring stress and temperature and application thereof arranged in engine piston

Abstract

The invention relates to a wireless device for measuring stress and temperature and an application thereof arranged in an engine piston. The wireless device consists of a wireless sensing part and a wireless receiving part; the wireless sensing part comprises a strain foil, a thermistor, a battery, a resistance bridge road, a signal amplifying circuit, a first power supply management module, a filter circuit, a voltage-stabilizing circuit, a second power supply management module, a microprocessor and a wireless transmitter; the wireless receiving part comprises a wireless receiver and a PC (personal computer); the application is characterized in that the strain foil and the thermistor are arranged at the bottom cavity of the piston in a pair way; a first PCB (printed circuit board) and a second PCB are respectively arranged at two sides of the piston pin; and the battery is arranged in an I-shaped slot of a connecting rod body. Compared with the prior art, the wireless device and application provided by the invention have the advantages that the wireless device can be placed into the internal cavity of the piston to measure data in real time, the use is convenient, the repeat assembling and disassembling of the engine during measuring can be avoided and the like.

Description

technical field [0001] The present invention relates to the technical field of measurement, in particular to a wireless device for measuring stress and temperature and its application in an engine piston. Background technique [0002] The piston is an extremely important part in a car engine, which can be understood as the "heart" of the engine. The structural design and operating conditions of the piston have a crucial impact on the reliability, life, emission and economy of the engine. The main function of the piston is to withstand the explosion pressure of the combustion gas in the cylinder, and transmit this pressure to the connecting rod through the piston pin to push the crankshaft to rotate and provide torque output. Since the top of the piston is in direct contact with the high-temperature gas, the temperature of the piston is also very high. On the one hand, the high temperature will significantly reduce the mechanical strength of the piston material, and on the o...

AI Technical Summary

Problems solved by technology

However, due to the limited movement space of the piston, the narrow space in the inner cavity of the piston, and the rapid reciprocating movement of the piston, the work of the lead wire is complicated and easily interferes with the moving parts. At the same time, there is corrosion of organic oil and the harsh working environment. The implementation of testing techniques and methods poses great difficulties

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