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Automatic acridid density grade monitoring system

A technology of density level and automatic monitoring, which is applied in measuring devices, geophysical measurements, instruments, etc., can solve the problems of increased probability of sound pulse overlap and increased number of high-amplitude pulses, so as to reduce the number of startups and consume less power , low operating costs

Inactive Publication Date: 2012-10-03
NORTHEAST NORMAL UNIVERSITY
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Problems solved by technology

At the same time, the number of high-amplitude pulses will also increase due to the increased probability of sound pulse overlap

Method used

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  • Automatic acridid density grade monitoring system
  • Automatic acridid density grade monitoring system
  • Automatic acridid density grade monitoring system

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Embodiment Construction

[0035] The examples in the scheme are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0036] 1. Signal collection

[0037] Four high-precision differential microphones are arranged on a spherical surface with a certain radius at a solid angle of 120 degrees. See the layout method for plane projection. figure 2 . The differential microphone is composed of two back-mounted microphones of the same nature, and the output signal of the microphone is the difference between the sound signals of the two sides. For wide-area background noise such as rain, wind, thunder, etc., since the intensity of the sound input on both sides is basically the same, the difference will be very small. There is a large difference in the intensity of the sound source, and its difference is much larger than that of the wide-area sound source, so as to achieve the purpose of improving the signal-to-noise ratio. Since the differential microphone ...

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Abstract

The invention belongs to the agricultural pest prevention technology, in particular relates to an automatic acridid density grade monitoring system which comprises four parts of a signal acquisition module, a signal preprocessing module, a recognizing and computing module and a remote data transmitting module, wherein the signal acquisition module is formed in a manner that four high-accuracy differential microphones are arranged three-dimensionally in 120 degrees on a spherical surface with a certain radius, and is used for acquiring sound signals within a certain range and transmitting the acquired signals to the signal preprocessing module; the signal preprocessing module comprises a preamplification circuit, a detection circuit, a waveform superposed circuit and a three-level embeddedcircuit and is used for preprocessing data sent by a sampling module to form a square wave pulse and transmitting the square wave pulse to the recognizing and computing module; the recognizing and computing module comprises an ATMEGA16 singlechip and is used for transmitting a signal processing result to the remote data transmitting module; and the remote data transmitting module is used for transmitting the result to a monitoring center. The automatic acridid density grade monitoring system has the advantages of low operation cost and unmanned all-weather monitoring, can realize direct measurement of the acridid density grade, can be independently used, and can form a comprehensive monitoring system.

Description

technical field [0001] The invention belongs to the technology of preventing agricultural diseases and insect pests, and in particular relates to an automatic monitoring system for locust density levels. Background technique [0002] The locust plague is a devastating biological disaster, and together with floods and droughts, it constitutes the three natural disasters of human society. Since the mid-1980s, due to the influence of abnormal climate and changes in the agricultural ecological environment, new locust areas have continuously emerged in various parts of my country, and old locust areas have repeatedly appeared. The frequency of locust occurrences has increased and the degree of damage has increased. According to preliminary statistics, my country's migratory locust occurrence areas currently involve 16 provinces and municipalities, with an occurrence area of ​​more than 200 million mu. The above-mentioned locust occurrence areas involve more than 100 million farm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/00G06N3/02
Inventor 任炳忠王寅亮袁海滨李敏王双维
Owner NORTHEAST NORMAL UNIVERSITY