Detection method, detection device and storage medium

Abstract

The embodiment of the invention provides a detection method, which comprises the following steps of: mixing a generated baseband signal with a local oscillator signal to generate a modulation signal; performing shunt processing on the modulation signal to at least obtain a transmitting signal and a receiving local oscillator signal, and transmitting the transmitting signal to a target area which can be radiated by a detection device; receiving an echo signal after the transmitting signal passes through a target object in the target area; and carrying out frequency mixing processing on the echo signal and the received local oscillator signal so as to calculate feature information of the target object at least based on a difference frequency signal obtained after the frequency mixing processing. Correspondingly, the embodiment of the invention also provides a detection device and a storage medium, coherent accumulation can be performed by using the coherence of signals, and the signals are effectively modulated, so that the anti-interference capability is improved, and the sensitivity of the detection device is improved.

Description

technical field [0001] Embodiments of the present invention relate to the field of radar detection, and in particular, to a detection method, a detection device, and a storage medium. Background technique [0002] Existing detection devices, such as laser radar, are radar systems that detect the characteristic information of target objects by emitting light beams; their working principle is to emit laser signals, and then properly process the received echo signals reflected from the target objects to obtain The characteristic information of the target object, such as the distance of the target object, the moving speed of the target object, etc. [0003] However, the radar system corresponding to the existing lidar cannot effectively modulate the signal, and has poor anti-interference ability; moreover, when the existing lidar is used for detection, the signal has no phase difference, and the ability to suppress background light is poor. Contents of the invention [0004] ...

Images