A blood flow signal capturing module is described, which includes a base, an elastic pad, a first piezoelectric module, a second piezoelectric module, and a signal transmitting and receiving assembly. The base has a first opening and a second opening. The elastic pad is fixed on a bottom portion of the base and covers the first opening and the second opening. The first piezoelectric module includes a first piezoelectric plate fixed on a top portion of the base. The first piezoelectric plate covers the first opening, and a first enclosed space is formed between the first piezoelectric plate, the base and the elastic pad. The second piezoelectric module includes a second piezoelectric plate fixed on the top portion of the base. The second piezoelectric plate covers the second opening, and a second enclosed space is formed between the second piezoelectric plate, the base and the elastic pad. The signal transmitting and receiving assembly is configured to transmit signals generated from the first piezoelectric plate and the second piezoelectric plate to an outer processing device.一種血流訊號擷取模組，包含基座、彈性墊體、第一壓電模組、第二壓電模組、以及訊號傳接組件。基座具有第一開口及第二開口。彈性墊體固定在基座底部且覆蓋第一開口與第二開口。第一壓電模組包含第一壓電片固定在基座之頂部。第一壓電片覆蓋第一開口，並與基座及彈性墊體共同形成第一密閉空間。第二壓電模組包含第二壓電片固定在基座之頂部。第二壓電片覆蓋第二開口，並與基座及彈性墊體共同形成第二密閉空間。訊號傳接組件電性連接第一壓電片與第二壓電片。訊號傳接組件配置以將第一壓電片與第二壓電片所產生之訊號傳送至外部之處理裝置。
