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Underground magnetic signal receiving device and receiving method based on Hall effect

A Hall effect and receiving device technology, applied in the field of underground magnetic signal receiving devices based on the Hall effect, can solve the problems of difficult adjustment of receiving sensitivity and frequency adjustment of receiving information, and achieve good anti-interference effect and improved accuracy

Active Publication Date: 2021-02-26
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide an underground magnetic signal receiving device and receiving method based on the Hall effect, which solves the problem of difficulty in adjusting the frequency of receiving information and adjusting the receiving sensitivity of the current underground magnetic induction wireless sensor network.

Method used

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  • Underground magnetic signal receiving device and receiving method based on Hall effect
  • Underground magnetic signal receiving device and receiving method based on Hall effect
  • Underground magnetic signal receiving device and receiving method based on Hall effect

Examples

Experimental program
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Embodiment 1

[0044] Embodiment 1: see Figure 1 to Figure 5 , a kind of underground magnetic signal receiving device based on Hall effect, comprises Hall element, FPGA decoding circuit and MCU, and described Hall element is used for excitation current I i Under the excitation of , it receives the magnetic signal and outputs the Hall voltage signal U H , after being decoded by the FPGA decoding circuit, it is sent to the MCU, which also includes a voltage comparison circuit, a current switching circuit, and a front-end signal processing circuit;

[0045] The output terminal of the Hall element is divided into two circuits, one is connected to the input terminal of the voltage comparison circuit, and the other is connected to the input terminal of the front-end signal processing circuit, which is used to connect U H respectively sent to the voltage comparison circuit and the front-end signal processing circuit;

[0046] The front-end signal processing circuit is used to U H Rectify and fi...

Embodiment 2

[0061] Example 2: see Figure 1 to Figure 5 , this embodiment is based on embodiment 1. The device of the underground magnetic signal receiving device based on the Hall effect is the same as embodiment 1, and also includes:

[0062] The front-end signal processing circuit includes a sequentially connected pre-amplification circuit, a signal filter processing circuit, and a multi-stage amplification processing circuit for processing the Hall voltage signal U H Prevent large, filter out power frequency interference signals, and further amplify the output; the output terminals of the multi-stage amplification processing circuit are respectively connected to the A / D processing module and the rectification and filtering module, wherein the A / D processing module is used to convert the signal of the amplified output The digital signal is sent to the FPGA, and the rectification and filtering module is used to convert the amplified output into a square wave and send it to the MCU to c...

Embodiment 3

[0065] Embodiment 3: see Figure 1 to Figure 5 , the present embodiment provides a method for receiving an underground magnetic signal receiving device based on the Hall effect, a method for installing an underground magnetic signal receiving device based on the Hall effect, comprising the following steps:

[0066] (1) Establish an underground magnetic signal receiving device based on the Hall effect, and preset the reference voltage V in the MCU REF and control signal D 0 ;

[0067] (2) Select an area to be tested for drilling, the aperture size is slightly larger than the size of the device, and place the device in the drill hole;

[0068] (3) Adjust the installation position, the specific method is the same as step (3) of embodiment 1; during the operation, I may appear i =I iMAX when U H still less than V REF In this case, it is necessary to re-select the location for installation. Finally, this step ensures that a suitable location can be selected, so that I i iMAX...

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Abstract

The invention discloses an underground magnetic signal receiving device and receiving method based on the Hall effect. The device consists of a Hall element, an excitation current control circuit, a front-end signal processing module, a decoding and a main control module. When the system starts to run, the excitation current of the Hall element is first adjusted by the excitation current control circuit, then the main control module measures the communication frequency through TIM1 and then sets the clock of the FPGA decoding module, and then the Hall element converts the magnetic signal into The electrical signal is input to the front-end signal processing module, and the digital signal obtained after signal amplification, filtering, and analog-to-digital conversion is input to the FPGA decoding module, and finally the decoded data is input to the MCU. The invention utilizes the Hall element to receive the magnetic signal, and adjusts the excitation current according to the magnetic field distribution at different positions to obtain better voltage output. At the same time, under the response speed of the Hall element, the reception of signals in the frequency range of 2kHz~100kHz can be realized.

Description

technical field [0001] The invention relates to an underground wireless signal receiving device and a receiving method, in particular to an underground magnetic signal receiving device and a receiving method based on the Hall effect. Background technique [0002] The underground wireless sensor network developed in recent years is an important branch of wireless sensor network. Underground wireless sensor network technology can be applied to the acquisition of geological body disaster anomaly information, farmland basic data acquisition, underground environment monitoring, frontier inspection and foreign enemy invasion, etc. It is a research field with broad prospects at present. [0003] Although underground wireless sensors have the advantages of good concealment, easy deployment, and large-scale use, the development of underground wireless communication technology is very difficult due to the complex underground environment that is not conducive to information transmissio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/16H04W4/38H04W84/18G01R19/165
CPCG01R19/165H04B1/16H04W84/18H04W4/38
Inventor 王洪辉魏超宇庹先国卓天祥邹定康钟盼王翔
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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