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Device and method for distance and speed measurement based on laser scanning and dual detector

A dual-detector, speed measurement technology, applied to measure the distance and relative speed between two objects, using laser scanning and dual laser detectors to measure and calculate, it can solve the problem of continuous measurement, small space range, and inability to track the same object Measurement and other issues, to achieve the effect of easy signal alignment and low cost

Inactive Publication Date: 2013-08-07
CHINA UNIV OF GEOSCIENCES (WUHAN)
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AI Technical Summary

Problems solved by technology

[0012] Several speed measurement methods commonly used at present, the photoelectric timer method and the laser speckle method have a small space range, and cannot track and measure the same object continuously.
The ultrasonic speed measurement method must fix the measuring instrument at a certain place, and can only measure absolute speed, not relative speed.

Method used

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  • Device and method for distance and speed measurement based on laser scanning and dual detector
  • Device and method for distance and speed measurement based on laser scanning and dual detector
  • Device and method for distance and speed measurement based on laser scanning and dual detector

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Embodiment Construction

[0035] The present invention will be described in detail below in conjunction with specific embodiments.

[0036] The structure of the distance and speed measurement device based on laser scanning and dual detectors provided in this embodiment is as follows figure 1As shown, it consists of a transmitting unit and a receiving unit. The transmitting unit is installed on object A, and the receiving unit is installed on object B. The relative distance and relative speed between object A and object B are measured. Wherein the emission unit includes a laser light source 1, an N prism 2 and a motor, the main section of the N prism 2 is a regular N-gon, the side of the N prism 2 is a reflective surface, and the purpose of reflection is achieved by coating a reflective film on its side, and The reflection peak of the reflective film matches the wavelength of the laser light emitted by the laser light source. The laser light source 1 is a semiconductor laser diode, which can be a point...

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Abstract

The invention provides a device and a method for distance and speed measurement adopting scanning laser signals and a dual detector. The device comprises a transmitting unit and a receiving unit. The transmitting unit is mounted on an object A; and the receiving unit is mounted on an object B. The relative distance and the relative speed between the object A and the object B can be measured. The transmitting unit comprises a laser linear source, an N prism with a principle section of an N-sided polygon and a motor which can drive the N prism to rotate; and the receiving unit comprises at least two photoelectric detectors and a single-chip microcontroller. The N prism is driven to rotate by the motor; and laser transmitted from the laser source is reflected by lateral sides of the N prism to the receiving unit, and is received by the photoelectric detectors successively. Back waves are not required on the technical scheme which can be applicable to objects in relative motions; tracking measurement and continuous measurement can be performed; and the device can further be applicable to objects moving at low speed, and is wide in application.

Description

technical field [0001] The invention relates to a method for measuring the distance and relative speed between two objects, in particular to a method for measuring and calculating by using laser scanning and double laser detectors, which belongs to the field of photoelectric detection. Background technique [0002] The commonly used methods for measuring the distance between macroscopic objects mainly include the following: line-of-sight measurement method and electromagnetic wave distance measurement method. Among them, the electromagnetic wave ranging method is divided into phase ranging method and pulse ranging method according to the measurement principle; according to different carrier wave bands, it is divided into laser ranging (visible), infrared ranging and microwave ranging. [0003] The line-of-sight measurement method uses a measuring instrument with a line-of-sight device to measure the distance between two points according to the principles of optics and trigon...

Claims

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Application Information

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IPC IPC(8): G01S11/12
Inventor 周俐娜程永进
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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