【文章內容簡介】 surface. The unavoidable temperature decreasing because of the asphalt transportation vehicle’s long working and transportation distance influences the paving quality of the road surface, the specific measures must be taken according to the heat release of the shell. This paper designed a set of wireless temperature using DS18B20 grouping mode test system for testing the temperature of the asphalt transportation vehicle shell, and the total points is 120. Temperature test system software adopts the modular design. The hypogenous machine collects data, stores data, sets up DS18B20, and sends the wireless module and so on. The epigenous machine adopts PC machines, mainly receives the temperature data from the hypogenous machine. The epigenous machine displays, stores and manages data. The simple munication between people and machines is performed by the epigenous machine. This paper will not illustrate the simple procedure of the epigenous machine in detail. The following is the illustration of parts of hypogenous machine. including the ponents of system hardware , software functions and process. A. System hardware Considering the multipoint temperature number of the temporary storage and the considerable internal RAM during the value conversion, the chief controlling chip adopts ATMEL 89C52 SingleChip Microputer with 256 bytes RAM and 8KB E2PROM procedure storage. As the distinguishable code of DS18S20 is read and numbered, the liquid crystal module (Ao Kela Chinese integrated module of OCMJ Jin Peng Company) and the keyboard module are added. The wireless digital transmission adopts the wireless module PTR2021 in the whole receptionsending form, which may has two amateur bands to choose and the regulative Baud Rate ( the max is 20Kbit/s), and the SingleChip Microputer serial port data can be received directly. The system hardware structure is shown as Fig 7: DS18B20, with the power supply, divided into 8 groups hung on P1 port (). The wireless module is hung on serial port directly and the hardware watchdog adopts the MAX813 chip. When the power is added to the system, the 89C52 reversion signal is transmitted from the MAX813 reversion pin, and the value of the reversion pulse is 200ms. When the procedure is in order, a pulse signal must be sent to MAX813 WDI pin in no more than the interval of to clear away the watchdog timer. If the interval is more than , the pin does not receive the pulse signal, and then the 89C52 must be reversed. As 120 DS18B20 serial numbers must be stored in the system, the data storage DS1225 (8K) against the power failure is developed. B. System software function and process The software part of the temperature test system numbers DS18B20, collects and transforms data, performs the wireless munication, manages keyboard and so on. For the convenience of the procedure debugging and the reliability, the module design is adopted, mainly including the keyboard processing module, the wireless munication module, the module of temperature collection and processing, the display module and so on. The software flow chart is shown as Fig 8 After the reversion of add power 89C52 selfchecks first, then allocates each branch procedure module. The chief procedure manages the keyboard, initializes the system and transfers each functional