Development Of The Force And Diformation Measurement System For Auto Gears

The automobile industry needs advanced detecting technology, and the advancement of detecting technology promotes the progress of automobile. Automobile accessory detecting is an important symbol of advanced automobile industry technology. Developing various detecting instruments using in the automobile industry is an important task of the manufacture industry of the detecting instrument.The gear pressure and deformation detecting instrument is manufactured for a new product of an automobile gear-box company. It can measure the deformation of the first driven gear, the second driven gear, the third initiative gear, the forth initiative gear and the fifth initiative gear under a changeless pressure.The instrument uses a lever to make the changeless pressure, and there is a displacement sensor at the same direction of the pressure. The pressure is measured by the pressure sensor. The whole instrument uses microcomputer to collect information and data processing, so it can greatly enhance the efficiency of measurement. The pressure's magnitude can be adjusted. It is am important trait, and it is one linchpin of the detecting instrument's success.In the paper, there are more detailed description on the instrument's mechanical structure, instrument system's hardware circuit design and software programming. The instrument's hardware system makes the microcontroller AT89C55 as the core, making signal acquisition by pressure sensor and displacement sensor. Specialized signal conditioning circuit is designed to make it converted into a measured voltage signal easily. It uses ADS7812 to do the analog-to-digital conversion and collect the information of the displacement sensor and the pressure sensor. The detecting result is displayed with the HS19264 LCD module. The system of software offers the framework of the function extensibility and the instrument upgrading with the menu operation. We can use the keyboard to operate the instrument, and the operating process is very simple.After the analysis and measurement of the mechanical structure of the whole system, hardware and software debugging, we give a long time to the instrument keeping running and testing. From these work, we know that the instrument is reliable, stable, and it has high efficiency and high precision. The instrument can satisfy the needs of high efficiency and precision on the product line.