Optical recognition and distance measurer

A distance measuring device and optical identification technology, which is applied in the field of optical measurement, can solve problems such as low precision, poor resolution, and poor real-time performance, and achieve the effects of high precision, high resolution, and good real-time performance

Inactive Publication Date: 2008-10-22
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem to be solved by the present invention is to provide an optical identification and ranging device to overcome the defects of poor resolution, low precision and poor real-time performance in the prior art

Method used

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  • Optical recognition and distance measurer
  • Optical recognition and distance measurer
  • Optical recognition and distance measurer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 1 , an optical identification and ranging device of the present embodiment includes:

[0030] The control unit S101 is a computer used to control the entire device. First, it sends a control command to the laser emitting unit S102;

[0031] The laser emitting unit S102, after receiving the control command issued by the control unit S101, emits a combined light composed of two laser beams with different wavelengths to the object to be measured;

[0032] The laser receiving unit S103 receives the above-mentioned optical signal reflected by the object to be measured, and converts the optical signal into an electrical signal for output;

[0033] The demodulation unit S104 demodulates the electrical signal output by the laser receiving unit S103 into electrical signals respectively generated by the two laser beams with different wavelengths by using the reference signal sent by the control unit S101;

[0034] An analog / digital A / D conversion unit S105, confi...

Embodiment 2

[0038] The reflection spectrum characteristics of various parts of plants (including fruit trees) are mainly formed by the absorption and reflection of light by cells, chlorophyll, water content and other biochemical components in leaves, fruits and branches. Part of the reflection spectrum curve has different shapes and characteristics, which is a function of the surface particle structure, particle size, optical properties of particles, incident light wavelength and other parameters. Different parts such as leaves, fruits, and branches have different reflection characteristics for different wavelengths of light. In a specific band, different parts such as leaves, fruits and branches have great differences in the reflection of light. Through the analysis of this difference, the leaves, fruits and branches can be distinguished.

[0039] Therefore, it is feasible to use optical methods to distinguish different parts such as leaves, fruits and branches of apple trees. At the sam...

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PUM

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Abstract

The invention provides an optical identification and range-finding device. The device comprises a laser transmitting unit used to transmit two bundles of combination rays formed by laser with different wavelengths to an object to be measured, a laser receiving unit used to receive optical signals reflected by the object to be measured and performing photoelectric conversion to the received optical signals and outputting electric signals, a demodulation unit used to demodulate the electric signals output by the laser receiving unit into electric signals produced by the two bundles of the laser with the different wavelengths, an analog/digital (A/D) conversion unit used to perform analog/digital (A/D) conversion to the electric signals output by the demodulation unit and output digital signals, a direction adjustment unit used to adjust the propagation direction of the combination rays emitted by the laser transmitting unit and a control unit used for the control of the whole device. The device has high detection accuracy, quick speed, and good real-time performance.

Description

technical field [0001] The invention relates to the technical field of optical measurement, in particular to an optical identification and distance measuring device used in a fruit picking robot system. Background technique [0002] In the design of the fruit picking robot, the role of the vision system is to obtain the specific location information of the fruit, then move the robotic arm to the best position for picking, and finally pick it. Therefore, accurately obtaining the three-dimensional position information of the target fruit is the main task of the fruit picking robot vision system. The currently known vision systems of fruit-picking robots basically use color cameras as vision devices. A color camera can only obtain the two-dimensional position information and maturity information of the target, but cannot obtain its three-dimensional position information. Without the depth distance, the robot cannot pick. Therefore, for the fruit picking environment where the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/48
Inventor 刘刚司永胜刘兆祥张亚静
Owner CHINA AGRI UNIV
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