The Application Of AVR Microprocessor To Testing Machines' Development

The testing machines is one branch of test facilities,most of them belongs to measuring instrment.These machines made in our coutry was on the middle or low class.The reliability and stability were not able to meet with the demands,especially for the innvation,cannot compete with international products.So it's emergency for us.In order to makeup for it,we construct the development platform of testing machine with the more advanced microprocessor—AVR chips,In our country ,it's partial to use 51 series microprocessor ,16 data bit and 32 data bit embeded processor in the development of testing machines.Following with the extend of the machine's fuction and with the improvement of peripheral chip,also for the demand of improving the properties of the machine,the 51 series microprocessors unable to adapt to it. But for the advanced embeded processor,it's too complicated and expensive to use,and it's defficult to compatible with the old system. The AVR microprocessor of ATMEL,a new rapid and low power consumption microprocessor,is better to adapt the demand of developing testing machine. It's new to use AVR microprocessor in developing testing machine,there was no other open example in our country.So this article is important to the development of domestic testing machine.In this paper,based on being familiar with structures and interelated modules of the AVR microprocessor,the followings had been finished with the application of AVR microprocessor:the designed plan of man-machine interface of testing machine,data acquisition system,controling system and other functional modules,the hardware circuit and software had been designed too.The new man-machine interface of testing machine by application of ATMEGA64 and touch LCD was satisfied to the demand for modern testing machine,which with the advantage of big displaying information,rapid and reliable key respondence.The new data collecting system designed with ATMEGA169,the arround chips was retrenched,the hignly actived multi-channal data exchang was achieved,improved the speed of data processing.By the application of PWM function,the stable heat rate control was achieved in the HDT&VICAT meassure instrument,the stable pressure source was also achieved in the drip irrigation testing machine.The antijamming technique in the developing was confered at the last part.The developing platform of testing machine was built by the above mentioned designs,with the core construction of AVR microprocessor. The properties of whole system was improved,compartible with the modules of 51 developing platform,and reduced the developed cycles of new type machine greatly.