Device for sensing human body abnormality by standing-wave radar and method for using same

A device for sensing human body abnormality using standing-wave radar, comprising:

• a standing-wave sensor for externally transmitting a frequency-swept radio wave, detecting, at two points separated by a fixed distance, a reflected wave received from an external reflection object based on the transmitted wavelength with X being the wavelength of the transmitted wave, and sensing a standing wave combined from the transmitted wave and the received wave;
• a computation unit for removing the DC component from the intensity distribution of the frequency of the combined wave sensed by said standing-wave sensor, performing a Fourier transform, obtaining a distance spectrum, and computing from the distance spectrum of a first interval and the distance spectrum of a second interval in a single period a phase difference from the distance spectra and a change in phase;
• a signal processor for removing the distance component obtained when no person is present in a measurement space from the distance component to the reflection object obtained from said phase difference, and obtaining distance information that is different from the distance component obtained when no person is present in the measurement space to extract the distance component to a person to be measured who has entered into said measurement space;
• and
• a determination unit for sensing an abnormality in a person to be measured from a variation in the intensity distribution of the component associated with the distance to the person to be measured and determining the physical state of said person to be measured and the physiological state including a respiratory rate and pulse from said change in phase.