Temperature is a very important physical quantity which used in production and life .For the different applications, it is necessary to produce the proper system of measuring temperature. In this article I will discuss the system of measuring close quarters temperature.
This system involves sensor technic, information processing technic, communication technic and so on .The design mainly includes the sensor part , analog-digital conversion ,the interface between the microcontroller and PC ,serial communication and so on .
The main theoretical base is theory of data collection .Temperature signals transform to the voltage signals .The single chip transforms the voltage code to ASCⅡcode which is the basic of communication .
I design the interface circuit between the single chip and PC .The temperature signals are received and described by VB and then displayed on the screen .All the signals can be Real-time memory in order to analyze them .
Form the result the metrical signals and the theoretical signals have the linearity relation .the result indicates that the has high precision and stability .We can draw the curve of temperature value and the code and establish the database ,form which we can get the real temperature of the different objects.
Keywords: temperature ; coding ; microcontroller ;regress curve
