Design Of Data Acquisition And Control System For Microwave Radiometer

Microwave radiometer is an important microwave remote sensing instrument.In order to make the microwave radiometer digital and networking,this thesis proposes a microwave radiometer acquisition control system.The system is mainly divided into three parts: the front end of the radiometer,the acquisition control module and the server.The system connects the analog signal output from the front end of the radiometer to the acquisition control module,converts it into a digital signal,and after synchronous detection and integration operation,it is finally uploaded to the server through Wi-Fi.The hardware part of the acquisition control module is mainly composed of a low frequency amplification unit and an STM32 control board with an ESP8266 chip.The software part includes AD acquisition,synchronous detection and integration of signals,square wave generation and Wi-Fi unit control functions.The software part of the server is mainly the parsing and saving of HTTP requests.Finally,the system is tested.The results show that the system can control the Dick switch at the front end of the radiometer,perform synchronous detection and integral calculation on the output of the radiometer,and remotely upload and save the output of the radiometer.