Research on application of PDA to radar life detector;

This paper introduces the basic conception and the principle of non-contact life detecting and then analyses the characteristics of several pulse generators and analyzes the principle of impulse generation by avalanche transistor.

The paper analyzes the special environmental requirements of coal mine accident rescue,puts forward a new life detecting equipment based on low-frequency radar and introduces the basic theory as well as the component of the system.

In our group, the life detecting technique has been mainly used to detect human beings and works as follows: first the radar transmits the electromagnetic wave to the human body and gets the echo which includes the vital signals caused by the respiration and heartbeat, then the signals are processed by some hardware and software, and finally the life parameters are obtained.

The Applied Research of DSP in Radar Life Detection System;

Because of the big volume, complicated operation and the bad effect of the present life detection devices, it is urgent to design a new kind of detection device with high performance.

The radar-based life-detection is that using microwave from radar to illuminate the human body without contacting it, the reflected wave of radar, which carries certain life information, is modulated by the surface movement resulting from the physical activity.

The life-detection radar works aiming for the process and recognition of the weak echo signals of the low velocity moving targets.

In military and civilian fields,life-detection radar is becoming more and more important.

The subminiature wireless audio system of life detection based on nRF24E1;