Elastic wave radar detection device and method

An elastic wave radar detection method, applied to an elastic wave radar detection device, wherein the elastic wave radar detection device comprises a vibration excitation device, a first sensor, a second sensor, and a controller, wherein the first sensor is arranged on the vibration excitation device, the second sensor is arranged on a detected object, the first sensor is configured to collect vibration excitation information, namely, an incident signal, the second sensor is configured to collect information of the detected object, namely, a vibration signal, and both the first sensor and the second sensor are connected to the controller;

• wherein the elastic wave radar detection method comprises the following steps:
• Step 1:
• knocking on different positions of the detected object through the vibration excitation device to obtain data for a plurality of knocks, comprising the incident signal and the vibration signal;
• Step 2:
• processing the incident signal to obtain a standard incident signal;
• Step 3:
• respectively performing Fourier transform on the incident signal, the vibration signal and the standard incident signal after each knock to obtain respective corresponding frequency domain complex representation forms, which are respectively Xi(f), Yi(f) and X0(f);
• and substituting Xi(f), Yi(f) and X0(f) into an elastic wave radar algorithm theoretical formula to obtain a frequency domain representation form of a vibration signal similar to a radar wave:
• Y
• i
• ′
• (
• f
• )
• =
• Y
• i
• (
• f
• )
• X
• i
• (
• f
• )
• ⁢
• X
• 0
• (
• f
• )
• .
• and
• Step 4:
• performing inverse Fourier transform on the frequency domain representation form of the vibration signal similar to the radar wave, so as to obtain a time domain waveform of the processed vibration signal.