Detection device and detection method

Abstract

A detection device for monitoring a human body includes: a millimeter-wave radar module, a data transmission element, and a processor. The millimeter-wave radar module can transmit a millimeter-wave signal towards the human body and receive a reflected signal from the human body. The millimeter-wave radar module can then generate a pre-processed signal based on the reflected signal. The data transmission element is coupled to the millimeter-wave radar module. The data transmission element transmits the pre-processed signal to the processor via a wired or wireless means. The processor can analyze the pre-processed signal to obtain physiological information about the human body.

Claims

1. A detection device for monitoring a human body, comprising: A millimeter-wave radar module transmits a millimeter-wave signal toward a human body and receives a reflected signal from the human body, wherein the millimeter-wave radar module generates a pre-processed signal based on the reflected signal; a processor analyzes the pre-processed signal to obtain physiological information of the human body; and a data transmission element coupled to the millimeter-wave radar module, wherein the data transmission element transmits the pre-processed signal to the processor via wired or wireless means; wherein the millimeter-wave radar module includes: a frequency-modulated continuous wave radar circuit; a plurality of transmitting antennas coupled to the frequency-modulated continuous wave radar circuit; and a plurality of receiving antennas coupled to the frequency-modulated continuous wave radar circuit, wherein the transmitting antennas and the receiving antennas form an antenna array; wherein the shortest distance between the transmitting antennas and the receiving antennas is between 0.5 and 1 wavelength of a millimeter-wave frequency band of the antenna array.

2. The detection device as claimed in claim 1, wherein the millimeter-wave radar module is mounted on the ceiling of a room, and the data transmission element is implemented by an Ethernet element or a wireless communication element.

3. The detection device as claimed in claim 2, wherein the frequency-modulated continuous wave radar circuit performs a preprocessing procedure on the reflected signal to obtain the preprocessed signal, and the preprocessed signal includes a reflection intensity variability, a three-dimensional point cloud data, and a three-dimensional radar data.

4. The detection device as described in claim 3, wherein the processor further executes a motion waveform calculation program on the three-dimensional radar data to obtain a phase change function of a displacement waveform of the human body, and the motion waveform calculation program includes a circle least squares method fitting program.

5. The detection device as described in claim 4, wherein the processor executes the motion waveform calculation program only when the processor determines, based on the reflection intensity variability and the three-dimensional point cloud data, that the human body is stationary and lying on a bed in the room.

6. The detection device as claimed in claim 4, wherein the processor further executes a first fast Fourier transform procedure and a first peak finding procedure for the phase change function to obtain a breathing frequency.

7. The detection device as claimed in claim 4, wherein the processor further performs a second derivative and absolute value calculation procedure for the phase change function to obtain a second derivative function, and the processor further performs a first bandpass filtering procedure, a second fast Fourier transform procedure, and a second peak finding procedure for the second derivative function to obtain a heartbeat frequency.

8. The detection device as described in claim 7, wherein the processor further executes a second bandpass filtering procedure, a short-time Fourier transform procedure, a third peak finding procedure, and a reciprocal calculation procedure for the second derivative function to obtain a heartbeat interval.

9. A detection method comprising the following steps: transmitting a millimeter-wave signal toward a human body using a millimeter-wave radar module; receiving a reflected signal from the human body using the millimeter-wave radar module; generating a preprocessed signal based on the reflected signal using the millimeter-wave radar module; transmitting the preprocessed signal to a processor via a data transmission element in a wired or wireless manner; and analyzing the preprocessed signal using the processor to obtain physiological information of the human body; wherein the millimeter-wave radar module includes a frequency-modulated continuous wave radar circuit, a plurality of transmitting antennas, and a plurality of receiving antennas, wherein the transmitting antennas and the receiving antennas are coupled to the frequency-modulated continuous wave radar circuit; wherein the transmitting antennas and the receiving antennas form an antenna array; wherein the shortest distance between the transmitting antennas and the receiving antennas is between 0.5 and 1 wavelength of a millimeter-wave frequency band of the antenna array.

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