Abstract:The traditional pressure sensor parament acquisition of spacecraft deployment task uses the wired connection, in the process of deployment, there exists corruption that cables wind with the force axis rotating. Previously, it was necessary to adjust the acquisition terminal according to the cable’s position to avoid cable breakage, which was extremely inconvenient. Besides the system uses single channel acquisition, which was inconvenient to multi-channel acquisition and data integration processing. In order to solve the above problems, an embedded and distributed wireless pressure sensor parameter acquisition system based on ESP8266 and LabVIEW is developed, which designs signal conditioning circuit and ADC acquisition module, uses the ESP8266 wireless module to deploy multi-point distributed networking. The terminal acquisition software is based on LabVIEW virtual instrument platform. Multithreading and low coupling QMH queue software framework is used. Function modules are developed independently to convenience developers to maintenance procedure in parallel. The software is able to realize the equipment communication , sensor calibration and data acquisition and processing, which uses the PSP server to share the test data dynamically and in real time, realizes the rapid data transmission through the network, and improves the data processing speed. The incremental integral separation PID algorithm is added to realize the linkage between the transmission mechanism and the sensor, which accurately controls the pressure parameter. Data dynamic fitting and overrun setting functions are also included. The system is stable in operation, which has high frequency of data acquisition, high control accuracy and engineering application value.
