Automatic Data Acquisition System Utilizing Microcomputers: Automatic Meteorological Stations (AMS)

摘要

The purpose of the system is to collect and store data from a standard agricultural or meteorological station. The sensors must have an electrical output of any type: analog or digital. The data coming from the sensors are read at programmed intervals and stored in the system itself and then transmitted to a microcomputer through a serial RS-232 interface. It is possible to display the data in real time at the computer monitor. The computer used was an Apple, where the data were stored in floppy disks. The prototype by the INPE's Department of Meteorology has the following capability: 16 analog inputs, 10 digital inputs, 8 KB memory and real time clock; everything supported by NO BREAK equipment. The complete system is made up of the following subsystems: microcomputer (video monitor, disk and drive interface and RS-232 serial interface), data collecting station with sensors conditioning box and NO BREAK. The system was initially used to collect and analyze data of solar radiation.