Abstract
Data collection and transmission is one of the important modern industrial control, usually sensor output analog signals will be sent to pass after instrumentation amplifier by computer, and then AD converter for data collection, and the communication channels will be sent after data modulation signal, the receiver, then were demodulated after data show results.
The data collection and transmission system with ADC0809 and AT89S52 as the core, and the data acquisition module, demodulation module, analog channels, the test code generator, noise simulator, results showed that module, etc. The system is analyzed and discussed the structure, data acquisition and one-way transmission system components modular design method, etc. This design in traditional data acquisition based on improved, utilize FSK modulator and eight of the analog signal acquisition and one-way transmission, through the keyboard operation data channel and precise baud rate, can divide for system according to the requirement for expansion is widely applied in various data acquisition..