Electronic life detection system
First Claim
1. Electronic life detection system using microwaves which are reflected to produce a reflected signal from a scanned area, the reflected signal having a portion modulated by body oscillations of a living being and an unmodulated portion, the system having a microwave transmitting/receiving device for generating and radiating the microwaves and also for receiving the reflected signal, the transmitting/receiving device having a first signal-conditioning device for conditioning a received reflected signal by elimination of the unmodulated portion the system also having an indicating device for outputting indication results, wherein the improvement comprises:
- the first signal-conditioning device including a compensation loop and a control loop for controlling the amplitude of the modulated portion of the received reflected signal; and
a second signal-conditioning device is arranged downstream of the microwave transmitting/receiving device, said second signal-conditioning device subjecting the received reflected signal processed by the first signal-conditioning device to a frequency analysis.
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Accused Products
Abstract
The invention relates to an electronic life detection system, in particular for the searching for buried persons and the surveillance of buildings, having a microwave transmitting/receiving device for generating and radiating microwaves into an area to be investigated and for registering the microwave signal reflected from the area under surveillance and modulated with the frequencies corresponding to the life functions of any living beings present in the area, which device has a first signal-conditioning device, and a second signal-conditioning device.
55 Citations
10 Claims
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1. Electronic life detection system using microwaves which are reflected to produce a reflected signal from a scanned area, the reflected signal having a portion modulated by body oscillations of a living being and an unmodulated portion, the system having a microwave transmitting/receiving device for generating and radiating the microwaves and also for receiving the reflected signal, the transmitting/receiving device having a first signal-conditioning device for conditioning a received reflected signal by elimination of the unmodulated portion the system also having an indicating device for outputting indication results, wherein the improvement comprises:
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the first signal-conditioning device including a compensation loop and a control loop for controlling the amplitude of the modulated portion of the received reflected signal; and a second signal-conditioning device is arranged downstream of the microwave transmitting/receiving device, said second signal-conditioning device subjecting the received reflected signal processed by the first signal-conditioning device to a frequency analysis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification