Microwave sensor for remote detection of signs of human life by registering movements of the surface of his body, including those associated with his breathing

摘要

The utility model relates to devices using the principle of radio wave reflection, namely, to measuring movement using microwave or EHF radio waves by the phase method, and can be used, among other things, in single death detection systems. Essence of the utility model: a microwave sensor for remote detection of signs of human life, containing two generally identical receiving-transmitting modules fixed relative to each other, each of which includes a generator of continuous harmonic oscillations connected to a transmitting antenna, a receiving antenna, a mixer connected by one input with the output of the generator of continuous harmonic oscillations, the second - with the output of the receiving antenna, and the output - with the input of the intermediate frequency amplifier, the outputs of the intermediate frequency amplifiers are connected through analog-to-digital converters with the inputs of the microcontroller, while the working polarizations of the transmitting antennas of the two receiving-transmitting modules are orthogonal each other, while the plane of the antennas of one module is shifted relative to the plane of the antennas of the other module by 1/8 of the working wavelength along the probing beam, and the working polarization of the receiving antenna is consistent with the working polarization of the transmitting antennas as part of one receiving-transmitting module and is orthogonal to the working polarization of the transmitting antenna of another receiving-transmitting module. The values of the operating frequencies of the two receiving-transmitting modules lie within the microwave or EHF ranges and differ from each other by no more than 10%. 1 w.p. f-ly, 1 ill.