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Detection device and detection method

A detection device and a technology for measuring speed, applied in the detection field, can solve the problems of long time and low precision, and achieve the effect of shortening the detection time and improving the detection accuracy

Pending Publication Date: 2020-11-24
NINGBO ABAX SENSING ELECTRONICS TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of this application is to provide a detection device and a detection method to solve the problem of time-consuming and low precision in the existing detection

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Embodiment Construction

[0036] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. The components of the embodiments of the application generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

[0037] Accordingly, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art w...

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Abstract

The invention provides a detection device and a detection method, and belongs to the field of detection. The detection device comprises a transmitting module, a receiving module and a signal processing module, the transmitting module comprises a narrow linewidth frequency modulation laser, and the narrow linewidth frequency modulation laser is used for outputting narrow linewidth laser modulated by step wave frequency; the receiving module is used for receiving an echo signal reflected back from a target object and obtaining a frequency mixing signal according to the echo signal and a signal output by the narrow linewidth frequency modulation laser; and the signal processing module is used for obtaining distance information and / or speed information of a target object according to the signal output by the narrow linewidth frequency modulation laser, the echo signal and the frequency mixing signal. The detection precision is improved, and the detection time is shortened. Meanwhile, the frequency modulation range of the laser with a large frequency modulation range can be completely utilized, and the frequency modulation range does not need to be limited within the range defined by the maximum distance measurement distance and the maximum intermediate frequency capable of being borne by the distance measurement system.

Description

technical field [0001] The present application relates to the field of detection technology, in particular to a detection device and a detection method. Background technique [0002] Speed ​​measurement and ranging coherent lidar is one of the comprehensive applications of lidar technology, coherent detection technology, and signal processing technology. It is widely used in aerospace, target monitoring, wind field measurement and many other fields, and has broad application prospects in military and civilian fields. [0003] Most of the current laser radars only measure the speed or distance information of the target. There are mainly the following methods for speed measurement and ranging: the first is to use microwave radar detection, but compared with the laser radar detection method, microwave radar beam width, angle The resolution is low and the anti-interference ability is not strong. The second is to use lidar direct detection. Compared with coherent detection, the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/32G01S17/58
CPCG01S17/32G01S17/58
Inventor 雷述宇
Owner NINGBO ABAX SENSING ELECTRONICS TECH CO LTD