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Method for realizing electromagnetic compatibility based on magnetic resistance sensor monitoring node

A magnetoresistive sensor, electromagnetic compatibility technology, applied in instruments, measuring devices, measuring magnetic variables, etc., can solve problems such as adverse effects on humans and the ecological environment, hazards to the safety and reliability of electronic products, and inability to work properly, achieving easy deployment. , the system structure is simple and clear, easy to achieve the effect

Inactive Publication Date: 2012-09-19
NANJING UNIV OF POSTS & TELECOMM +1
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Problems solved by technology

However, with the utilization of electromagnetic compatibility, various electromagnetic interference problems have also been brought and produced.
The electromagnetic field and electromagnetic energy in each frequency band, through the way of radiation and conduction, affects the working sensitive electronic equipment in the form of occasional current (voltage), making it unable to work normally
Moreover, like the pollution of the ecological environment, with the development of science and technology, the pollution of the electromagnetic environment is becoming more and more serious. It not only endangers the safety and reliability of electronic products, but also has adverse effects on human beings and the ecological environment.

Method used

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  • Method for realizing electromagnetic compatibility based on magnetic resistance sensor monitoring node
  • Method for realizing electromagnetic compatibility based on magnetic resistance sensor monitoring node
  • Method for realizing electromagnetic compatibility based on magnetic resistance sensor monitoring node

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[0046] Step 1) The traffic flow monitoring node uses a 220V-5V voltage converter to provide the 5V power supply required by the node. The selected capacitor is an SMT capacitor, and the package is: 0805. The resistor is an SMT resistor (RI), and the package is: 0805. The magnetoresistive sensor is: HMC1022, 16-pin package of SOIC. The differential operational amplifier AMP04 is packaged in an SMT SOIC 8-pin package. The chip LM4140 provides the bandgap voltage for the amplifier - 2.048V, and the package is a SOIC 8-pin package in the form of SMT. Set reset chipset, chip MAX662A (5V-20V), packaged as SMT form SOIC 8-pin package; chip IRF7106 (field effect tube - electronic switch), packaged as SMT form SOIC 8-pin package. The wireless communication module uses a 24-slot HDR2X12-packaged pin-separated communication processing module on the PCB of the node to separate the digital area from the analog area and reduce coupling. The chip AMS1117MP provides 3.3V power supply to p...

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Abstract

Nowadays the urban traffic jam and blocking phenomena become more and more serious, the electromagnetic environment around the urban traffic roads is complex, and electromagnetic interference sources, radio-frequency signals and aerial conductors exist on the roads, furthermore, electric equipment have the interference source, so that the magnetic signal detection on traffic roads becomes a task with significant meaning and full of challenge. The method is proposed based on a classic electromagnetic theory and the PCB (Printed Circuit Board) engineering experiment experience and aims at the wireless sensor network technology of traffic flow monitoring nodes and characteristics of magnetic resistance sensors, so that the electromagnetic compatibility (EMC) design on specific traffic flow monitoring node devices is proposed; therefore, the electromagnetic compatibility and the electromagnetic resistance of the device are improved, and the device can work stably and reliably under a complex electromagnetic environment of the roads.

Description

technical field [0001] The present invention is based on the wireless sensor network (Wireless Sensor Networks: WSN) technology in the design of the electromagnetic compatibility of the traffic flow monitoring circuit. line to provide an important solution, the invention belongs to the field of electromagnetic compatibility (EMC) design. Background technique [0002] Electromagnetic energy has been widely used in modern science, especially in the fields of radio, television, communication, navigation, radar, telemetry and remote sensing, and computers. However, with the utilization of electromagnetic compatibility, various electromagnetic interference problems are also brought and produced. The electromagnetic field and electromagnetic energy in each frequency band, through the way of radiation and conduction, affects the working sensitive electronic equipment in the form of field current (voltage), making it unable to work normally. Moreover, like the pollution of the eco...

Claims

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Application Information

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IPC IPC(8): G01R33/00G08G1/042
Inventor 孙力娟黄荣谞肖甫王汝传吴婉阳黄海平沙超郭剑
Owner NANJING UNIV OF POSTS & TELECOMM
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