Laser detection device

A laser detection device, comprising:

• a laser emitter, configured to emit a laser to a target object;
• a laser detector, configured to receive an echo signal reflected by the target object;
• and
• a laser echo signal processing circuitry, configured to sample the echo signal,
• wherein the laser echo signal processing circuitry comprises a controller, a time digital converter and a dynamic threshold value generation circuit, and the controller is electrically connected to the time digital converter through the dynamic threshold value generation circuit;
• wherein the controller is configured to output a digital signal to the dynamic threshold value generation circuit;
• wherein the dynamic threshold value generation circuit is configured to generate at least two analog threshold signals to the time digital converter based on the digital signal;
• and
• wherein the time digital converter is configured to sample the echo signal based on the threshold signals.