Circuit module for ultrasonic leakage detector

The utility model discloses a circuit module for an ultrasonic leakage detector. The circuit module comprises a power management board, an ultrasonic signal acquisition board, an FPGA-AD acquisition board and an ARM core board, the power management board is electrically connected with the ultrasonic signal acquisition board, the FPGA-AD acquisition board and the ARM core board respectively and supplies power to the ultrasonic signal acquisition board, the FPGA-AD acquisition board and the ARM core board respectively; the ultrasonic signal acquisition board is used for acquiring an ultrasonic signal at a gas leakage position and filtering and amplifying the ultrasonic signal; the FPGA-AD acquisition board is electrically connected with the ultrasonic signal acquisition board and is used for converting and transmitting signals output by the ultrasonic signal acquisition board; and the ARM core board is electrically connected with the FPGA-AD acquisition board and is used for realizing data storage and display f