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Tree canopy thickness detection method based on ultrasonic echo signals

A technology of ultrasonic echo and detection method, which is applied in the field of agricultural machinery information sensing and detection, and can solve the problems of tree canopy thickness error and poor applicability

Active Publication Date: 2020-10-16
JIANGSU UNIV
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Problems solved by technology

[0004] At present, the traditional tree canopy thickness sensing detection method has the following problems: First, in the actual operation process, the distance between the agricultural machinery and the tree canopy center is continuously changing, while the traditional method assumes that the distance Invariant, which introduces a large error in the calculation of tree canopy thickness
The second is that this method is suitable for spindle-shaped fruit trees with better symmetry, and is very poor for fruit trees with asymmetric canopies such as fence-shaped fruit trees.

Method used

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  • Tree canopy thickness detection method based on ultrasonic echo signals
  • Tree canopy thickness detection method based on ultrasonic echo signals
  • Tree canopy thickness detection method based on ultrasonic echo signals

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Embodiment Construction

[0021] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0022] Such as figure 1 As shown, it is a schematic diagram of an ultrasonic sensor detecting the thickness of the tree canopy provided by an embodiment of the present invention. The ultrasonic sensor 1 sends an ultrasonic transmission signal 4 facing the tree canopy 3, and the tree canopy 3 is reflected to form an ultrasonic echo signal 5. The tree canopy thickness 2 along the ultrasonic detection direction emitted by the ultrasonic sensor 1 is as follows: figure 1 shown.

[0023] Typical ultrasonic transmission signal 4 and ultrasonic echo signal 5 such as figure 2 As shown, the ultrasonic transmission signal 4 and the ultrasonic echo signal 5 are composed of voltage data and corresponding time data within a certain period of time, wherein the ultrasonic transmission signal 4 is ...

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Abstract

The invention relates to a tree canopy thickness detection method based on ultrasonic echo signals, and belongs to the technical field of agricultural machinery information sensing detection. According to the method, the first effective wave crest and the last effective wave crest of the ultrasonic echo signal are analyzed and judged, the first effective wave crest time and the last effective wavecrest time are obtained, and the tree canopy thickness is obtained according to the provided calculation formula, so that direct detection of the tree canopy thickness is realized. The method has thecharacteristics of high precision, wide application range and the like, and is suitable for the field of tree canopy thickness detection in the industries of agricultural machinery, forestry machinery and the like.

Description

technical field [0001] The invention relates to a method for detecting the thickness of a tree canopy based on an ultrasonic echo signal, which belongs to the technical field of agricultural machinery information sensing and detection. detection technology. Background technique [0002] During the operation of intelligent agricultural machinery such as plant protection variable spraying machines in orchards, in order to achieve precise adjustment of operating parameters, real-time sensing and detection of tree canopy thickness is required. [0003] At present, the traditional tree canopy thickness sensing detection method mainly uses the principle of infrared, ultrasonic and laser ranging. The layers are distributed symmetrically. On this basis, the distance between the machine and the tree canopy is detected by infrared sensors, ultrasonic sensors and laser sensors, so as to indirectly calculate the thickness of the tree canopy along the direction of ultrasonic detection, ...

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Application Information

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IPC IPC(8): G01S15/88
CPCG01S15/88G01S15/10G01S7/539G01B17/02
Inventor 欧鸣雄杨帅贾卫东李勇戴世群
Owner JIANGSU UNIV
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