Echo signal receiving device in laser ranging

Abstract

The invention provides an echo signal receiving device in laser range finding. The echo signal receiving device comprises a signal receiving end and multistage signal acquisition channels, wherein each stage of signal acquisition channel comprises a voltage-dividing unit and a signal acquisition card; the signal receiving end receives a laser echo signal, converts the laser echo signal into an electric signal, and transmits the electric signal to each stage of signal acquisition channel; the voltage-dividing unit of the current signal acquisition channel performs voltage division processing on the electric signal according to a voltage division proportion corresponding to the current signal acquisition channel, and inputs the electric signal after voltage division processing to the corresponding signal acquisition card; and the signal acquisition card acquires the input electric signal according to a preset acquisition range, wherein preset acquisition ranges of the signal acquisition cards in the multistage signal acquisition channels are identical. The echo signal receiving device acquires the echo signal through the multistage signal acquisition channels, can effectively expand a dynamic range of the acquired echo signals, can ensure the integrity of echo signal reception, and ensures the distance of a measured target object and the accuracy of the grey scale information.

Description

technical field [0001] The present invention relates to the technical field of laser ranging, and in particular, to a device for receiving echo signals in laser ranging. Background technique [0002] Compared with other ranging technologies, laser ranging has many advantages, such as strong anti-interference ability, high ranging accuracy, and long measurement distance, and has been widely used. In recent years, 3D laser scanners based on laser ranging technology are promoting the rapid development of mobile measurement, 3D real map and other fields, and are of great significance in the national economy and national defense construction. [0003] The main principle of laser ranging is that the ranging system includes a laser emission system. The laser emission system emits laser light to the target object. The laser is reflected (usually diffusely reflected) by the target object and then returns to the ranging system. Laser is also called echo signal. By calculating the fli...

AI Technical Summary

Problems solved by technology

[0006] In view of this, the purpose of the embodiment of the present invention is to provide an echo signal receiving device in laser ranging to solve the problem that the echo signal receiving device in the related art can adapt to a limited dynamic range and it is difficult to ensure the integrity of echo signal reception. Therefore, the accuracy of the distance and grayscale information of the target object measured according to the echo signal is poor

Images