Working principle of electromagnetic radiation measuring instrument
The electromagnetic radiation measuring instrument mainly consists of sensors, filtering networks, amplification parts, analog-to-digital conversion, keyboard control, microcontroller control unit, display and alarm parts, etc. The entire system is powered by a 9V battery, and the electromagnetic signals detected by the sensor probes are filtered through a network and sent to the amplification circuit. The filtered and amplified signal enters the analog-to-digital conversion module, and the converted digital signal is sent to the microcontroller for processing. In programming, the obtained data is calculated to determine the magnitude of electromagnetic radiation power density, which is displayed on a liquid crystal module with peak holding and peak display functions. At the same time, an alarm is triggered for data that exceeds the limit value, indicating that the measured power density value exceeds the limit value.
What is electromagnetic radiation?
Electromagnetic radiation is the phenomenon of electromagnetic energy propagating through space in the form of electromagnetic waves.
The Earth, where humans live, is itself a large magnetic field, and the thermal radiation and lightning on its surface can generate electromagnetic radiation. The Sun and other planets also continuously produce electromagnetic radiation from outer space.
Artificial electromagnetic radiation mainly comes from various electrical equipment, such as broadcasting and television transmitters, microwaves, radars, mobile phones, wireless intercoms, mobile communication base stations, microwave ovens, magnetic resonance equipment, televisions, computers, etc.
