ABSTRACT
In accordance with the present situation and mainly existing problems of the temperature instrument, a kind of 32-orad temperature-cruising test instrument has been designed in this article. The road's number of the meter can be broadened from No.0 to No.99. Besides its high precision, low power, it can alarm, display and register, which makes it easily controlled. On the hardware, the 1-wire progressive digital the mometer has been elected to test temperature so the traditional A/D converter will not be used. This makes the meter circuit easy. The circuit also include real-time clock circuit, analog series communication port control display driving circuit, LED alarm circuit and the circuit which center Watchdog, E2PROM, up supervisory on one chip. On the software, using assembly language in programming for CPU realized monitoring the temperature on every road and center management. In addition, there are only 4 buttons, but can control easily. Generally, the study on this topic will develop a high level of the common environmental temperature instruments measuring and management, and it is very worthy of generalization and application.
