Laser signal detection device based on DSP embedded system and control method thereof

Abstract

The invention discloses a laser signal detection device based on a DSP embedded system and a control method thereof. The laser signal detection device comprises a four-quadrant detector, a detector interface board, a signal processing board, a data processing board, and a power board. The detector interface board includes a single-ended conversion differential circuit. The signal processing board consists of a differential receiving circuit, a main gain control circuit, a variable gain control circuit, a summing circuit, a comparison circuit and a peak holding circuit. The data processing board includes a DSP processor, a D / A conversion circuit, an analog switch circuit, and a CAN bus driver circuit. The CAN bus driver circuit is connected with an upper computer; the D / A conversion circuit is connected with a detector assembly, the comparison circuit and the variable gain control circuit respectively. And the DSP processor is connected with the peak holding circuit, the comparison circuit, the main gain control circuit, and the four-quadrant detector by a GPIO module. With a control algorithm, detection of a fixed-cycle laser signal and target offset angle calculation can be completed.

Description

technical field [0001] The invention belongs to the field of signal processing, and in particular relates to a laser signal detection device and a control method based on a DSP embedded system, which are used in a laser measurement system to realize detection, identification and angle measurement of laser signals. Background technique [0002] Laser detection is to use laser as the information carrier to measure the displacement, distance and deviation angle of fixed or moving targets. Due to the good monochromaticity of the laser and the small divergence angle of the beam, it has high detection accuracy, detection range and Strong anti-interference ability, compared with other detection devices, it has the advantages of relatively simple system structure and low cost. A complete laser detection system is divided into an irradiator and a receiver. The irradiator sends a laser pulse signal of a certain frequency to irradiate the target object. After being reflected by the tar...

AI Technical Summary

Problems solved by technology

The current laser signal detection devices are mostly realized by analog discrete components, the system integration is not high, the volume is large, and it is sensitive to external and circuit noise interference; the control system of most devices mostly uses a single-chip microcomputer architecture, and there is a need for data processing and recognition algorithms. The disadvantage of low real-time execution

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