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
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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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