Design of SENT signal acquisition system based on LabVIEW

With the emergence of single-edge nibble transmission (SENT) signals in the field of automotive sensors, equipping major vehicle manufacturing companies with a set of well-functioning SENT signal acquisition systems has become an essential requirement. At present, we have designed a SENT signal acquisition system to satisfy this requirement and provide a practical option for companies. The acquisition system is based on the SENT J2716 communication protocol. A master control circuit with an STM8AF6213 microcontroller as the core is used to capture the sensor output signal and apply C language programming to realize the decoding of the signal. Finally, the data are processed, extracted, and preserved by the LabVIEW program to achieve the purpose of data visualization. In order to ensure the accuracy of the data, a double Cyclic Redundancy Check (CRC) checksum mode is incorporated into the system. After completion, the system was applied to several sets of SENT signal acquisition and testing experiments, and the experimental results all showed that the system operated normally and could meet the requirements of companies.