SENSOR AND SENSING METHOD THEREOF

• US 20120302899A1
• Filed: 05/22/2012
• Published: 11/29/2012
• Est. Priority Date: 05/25/2011
• Status: Abandoned Application

• Current Assignee: Industry Academic Cooperation Foundation
• Original Assignee: Industry Academic Cooperation Foundation
• Inventors: YOOK, Jong Gwan, KIM, Sanggyu, YUN, Gi-ho
• Application Number:
  US13/477,152
• Publication Number:
  US 20120302899A1
• Time in Patent Office: Days
• US Class Current: 600/484
• CPC Class Codes: A61B 5/0205 Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition
• CPC Class Codes: A61B 5/0507 using microwaves or terahertz waves

Abstract

A biosignal measuring sensor and a biosignal measuring method are provided. The biosignal measuring sensor includes an oscillator, a signal detection unit, and a signal processing unit. The amount of oscillation frequency shift of the oscillator is detected as intensity change of a biosignal, and a pulse signal and a respiration signal are detected from the detected biosignal. In the biosignal measuring sensor and the biosignal measuring method, a biosignal is detected in a manner of non-contact with a biosignal measuring target. Moreover, the biosignal may be detected accurately at a close range.

Claims

1. A biosignal measuring sensor comprising:

an oscillator configured to generate oscillation frequency shift in response to a biosignal; and

a signal detection unit configured to detect intensity change of the biosignal by using the degree of the oscillation frequency shift.

2. The biosignal measuring sensor of claim 1, wherein the signal detection unit comprises a filter unit configured to detect the intensity change of the biosignal with respect to a frequency by using an SAW filter.

3. The biosignal measuring sensor of claim 2, wherein the signal detection unit further comprises a power detector connected to the filter unit and configured to convert the intensity change of the biosignal with respect to a frequency into the intensity change of the biosignal with respect to time.

4. The biosignal measuring sensor of claim 3, further comprising:

an analog-to-digital converter configured to convert the detected biosignal of the intensity change with respect to time into a digital signal; and

a data transmitting unit configured to transmit the digital signal to a terminal.

5. The biosignal measuring sensor of claim 4, wherein the data transmitting unit is configured to transmit data through a Bluetooth, Wi-Fi or ZigBee communication network.

6. The biosignal measuring sensor of claim 1, wherein the oscillator comprises a resonator, and

wherein an input impedance of the resonator varies with the biosignal.

7. The biosignal measuring sensor of claim 6, wherein the resonator comprises a planar resonator configured to generate resonance at a band from 2.4 GHz to 2.5 GHz.

8. The biosignal measuring sensor of claim 1, further comprising:

a signal processing unit connected to the signal detection unit and configured to detect a pulse signal and a respiration signal from the detected biosignal.

9. The biosignal measuring sensor of claim 8, wherein the signal processing unit comprises:

a DFT unit configured to transform the detected biosignal in a manner of discrete Fourier transform;

a filter unit configured to filter an output signal of the DFT unit to detect a pulse signal and a respiration signal; and

an IDFT unit configured to transform the pulse signal and the respiration signal in a manner of inverse discrete Fourier transform.

10. The biosignal measuring sensor of claim 8, further comprising:

a display unit configured to output at least one of the detected pulse and respiration signals.

11. The biosignal measuring sensor of claim 10, which measures a biosignal in a non-contact manner.

12. A terminal comprising:

a data receiving unit configured to receive a detected biosignal using oscillation frequency shift of an oscillator corresponding to a biosignal;

a signal processing unit configured to detect a pulse signal and a respiration signal from the received biosignal; and

a display unit configured to output at least one of the pulse and respiration signals.

13. A biosignal measuring method comprising:

generating oscillation frequency shift of an oscillation corresponding to a biosignal; and

detecting intensity change of the biosignal using the degree of the oscillation frequency shift.

14. The biosignal measuring method of claim 13, wherein generating oscillation frequency shift comprises:

generating oscillation frequency shift by change in input impedance of a resonance.

15. The biosignal measuring method of claim 13, wherein generating oscillation frequency shift comprises:

converting the degree of the oscillation frequency shift into intensity change of the biosignal depending on a frequency; and

converting the intensity change of the biosignal depending on frequency into intensity change of the biosignal depending on time.

16. The biosignal measuring method of claim 15, further comprising:

transmitting the biosignal detected as the intensity change depending on time to a terminal.

17. The biosignal measuring method of claim 15, wherein converting the degree of the oscillation frequency shift into intensity change of the biosignal depending on a frequency is performed using an SAW filter.

18. The biosignal measuring method of claim 15, wherein converting the intensity change of the biosignal depending on frequency into intensity change of the biosignal depending on time is performed using a power detector.

19. The biosignal measuring method of claim 13, further comprising:

detecting a pulse signal and a respiration signal from the intensity change of the biosignal.

20. A distance measuring sensor comprising:

an oscillator configured to generate oscillation frequency shift corresponding to a measuring target;

a storage unit configured to store a shifted oscillation frequency value; and

a distance calculator configured to determine a distance to the measuring target based on the shifted oscillation frequency value.

21. The distance measuring sensor further comprising:

a database unit configured to store an oscillation frequency value of the oscillator according to the distance between the measuring target and the distance measuring sensor.