Abstract: This paper introduces a system of the microwave radiometer data acquisition, the system is mainly made up of PC104 based on the Linux operating system and the microcontroller based on MCS-51. In the hardware the vital part of PC104 is SB-810 which is a main board used in industry control and the vital part of MCS-51 microcontroller is the logic control part. With the proper memory device and other peripheral circuit, the data acquisition system has come true. In the software PC104 is programmed in serial communication under Linux operating system mainly. Via this method, the serial communication between PC104 and MCS-51 microcontroller has been successfully realized. The small system can gather the data that the microwave radiometer has transmitted. This system has been proved to reach the measure standard and to work steadily. The system displays good performance under the badly environment.

Key words: microcontroller, serial communication, industrial control