shows the block diagram of our prototype hardware system, in which Field-Programmable Gate Array (FPGA) and DSP play the core roles. The FPGA controls the multiplexer to connect the activation and signal conditioning modules to the regarding PZT sensors functioned as transmitter and receiver accordingly. The resonance frequency of PZT sensor is 80 kHz, which is designed for gas flow measurement applications. The echo signal after being amplified and filtered is sampled by an A/D converter with a sampling rate of 60 MSPS and then saved in FPGA. The DSP interconnects with the FPGA through Serial Peripheral Interface link and obtains the saved ultrasonic signals to complete the transit time difference calculation using the methods, including zero crossing, crosscorrelation, and digital modulation and demodulation. The DSP is also responsible for the flow rate calculation and sending the result to the LCD display module.Our future work will focus on implementing the proposed SVR-based data integration method on the hardware system