Method for improving pulse ranging precision and pulse ranging equipment

A technology of ranging accuracy and ranging equipment, applied in the field of methods and pulse ranging equipment, can solve the problems of high cost, poor anti-noise ability, complex circuit, etc., and achieve the effect of high precision and low cost

Active Publication Date: 2017-06-30
SHENZHEN MILESEEY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this detection method still has some disadvantages, mainly reflected in: 1. The circuit is complex and the cost is high; 2. The ability to withstand noise is poor

Method used

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  • Method for improving pulse ranging precision and pulse ranging equipment
  • Method for improving pulse ranging precision and pulse ranging equipment
  • Method for improving pulse ranging precision and pulse ranging equipment

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Embodiment Construction

[0051] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0052] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation or position indicated by "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. The relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the descrip...

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Abstract

The invention discloses a method for improving pulse ranging precision. The method is characterized by comprising the following steps of a, transmitting a laser pulse and simultaneously starting timing; b, respectively recording time t1 between laser signal transmission and an echo wave rising edge signal and time t2 between laser signal transmission and an echo falling edge signa; c, obtaining an initial measurement distance x=(t1*V)/2, echo signal pulse width y=(t2-t1)*v, wherein v represents light velocity and unit is m/s; and d, through a Levenberg-Marquardt method, by means of the initial measurement distance x and the echo pulse width y, obtaining a functional relation of a final measurement distance z through fitting based on a nonlinear curve of matrix data: z=p1+p2*x+p3*x^2+p4*x^3+p5*x^4+p6*x^5+p7*Ln(y)+p8*(Ln(y))^2+p9*(Ln(y))^3+p10*(Ln(y))+p11*(Ln(y))^5), wherein the unit of z is m, P1 to P11 are constants, and an average value is calculated from a plurality of detection results. The invention further discloses pulse ranging equipment applied to the method. The method and the pulse ranging equipment have advantages of high detection precision and large measurable distance range.

Description

technical field [0001] The invention relates to the optical instrument manufacturing industry, in particular to a method for improving the accuracy of pulse ranging and pulse ranging equipment. Background technique [0002] The measurement accuracy of pulsed laser ranging mainly depends on the rising edge of the laser pulse, the bandwidth of the receiving channel, the signal-to-noise ratio of the detector and the accuracy of time interval measurement. The accuracy of the distance is mainly considered from the laser flight time t. The most critical technology is how to accurately determine the start and end moments of t and the precise measurement time interval. They use the time identification method and the time interval method respectively. [0003] For the time interval method, there is a large error in determining the start and end time of t and the precise measurement time interval, and the detection accuracy needs to be improved. If you buy high-precision detection equ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/08
CPCG01S17/08
Inventor 侴智张明骆龙
Owner SHENZHEN MILESEEY TECH
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