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1. WO2016057781 - PROCÉDÉ ET APPAREIL POUR L'ACQUISITION DE SIGNES VITAUX RAPIDE SANS CONTACT SUR LA BASE D'UN SIGNAL RADAR

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

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CLAIMS

Therefore, at least the following is claimed:

1. A method of estimating a vibration rate of a target, comprising:

transmitting a transmit signal from a transmitting antenna at a target such that the transmit signal is reflected by the target to create a reflected signal, wherein the transmit signal and the reflected signal are electromagnetic signals having a wavelength, A, where the transmit signal is represented as T(t) = cos(wt + ɸ(t)) and the reflected signal is represented as R(t) = cos(w(t ‒ td) + ɸ(t ‒ td)), where td is a a time period the transmit signal travels from the transmitting antenna to the target and the reflected signal travels from the target to the receiving antenna;

receiving the reflected signal via a receiving antenna to create a receive signal, wherein the target is vibrating with a first vibration at a first vibration rate and a first vibration amplitude, wherein the target is vibrating with a second vibration at a second vibration rate and a second vibration amplitude, wherein a transmit distance between the transmitting antenna and the target and a receive distance between the target and the receiving antenna are such that ɸ(t ‒ td) ≈ ɸ(t) and the receive signal is approximated as R(t) ≈ I(t) cos (ωt + ɸ(t)) + Q(t) sin (ωt + ɸ(t)), where I(t) = cos (4πd/λ), Q(t) = sin (4πd/λ);

determining an approximation of the first vibration from a signal representative of R(t);

subtracting the approximation of the first vibration from the signal representative of R(t) to produce a remaining signal;

processing the remaining signal to produce a processed remaining signal; and

analyzing the processed remaining signal to identify at least two occurrences of a known position on a cycle of the second vibration in the processed remaining

signal corresponding to at least two occurrences of the known position on the cycle of the second vibration, wherein identification of occurrences of the known position on the cycle of the second vibration in the processed remaining signal is enhanced compared to identifying the remaining signal.

2. The method according to claim 1, further comprising:

determining the second vibration rate from a corresponding at least two locations of the at least two occurrences of the known position on the cycle of the second vibration in the processed remaining signal.

3. The method according to claim 1, wherein the signal representative of R(t) is B(t), wherein B(t) is a baseband signal produced by combining I(t) and Q(t) such that B(t) = I(t) + jQ(t) = exp(J4πd0/λ) exp(j(4πxh(t) + 4πxr(t))/λ), where d = tdc/2 and d = d0 + xh(t) + xr(t).

4. The method according to claim 1, wherein determining an approximation of the first vibration from the signal representative of R(t) comprises:

analyzing the signal representative of R(t) to identify at least two occurrences of a known position on a cycle of the first vibration in the signal representative of R(t) corresponding to at least two occurrences of the known position on the cycle of the first vibration; and

separating the signal representative of R(t) into segments between locations of known positions on the cycle of the first vibration in the signal representative of R(t) of the at least two occurrences of the known position on the cycle of the first vibration in the signal representative of R(t) and fitting a curve fit to the first vibration, wherein the curve fit is the approximation of the first vibration.

5. The method according to claim 1, wherein the at least two occurrences of the known position on the cycle of the second vibration in the processed remaining signal are at least two peaks of the second vibration in the processed remaining signal.

6. The method according to claim 4, wherein the at least two occurrences of the known position on the cycle of the first vibration in the signal representative of R(t) are at least two peaks of the first vibration in the signal representative of R(t).

7. The method according to claim 6, wherein the at least two peaks of the first vibration are at least two adjacent peaks of the first vibration.

8. The method according to claim 7, wherein separating the signal representative of R(t) into segments between peaks of the at least two peaks of the first vibration in the signal representative of R(t) comprises separating the signal representative of R(t) into segments between adjacent peaks of the at least two adjacent peaks of the first vibration in the signal representative of R(t).

9. The method according to claim 1, wherein analyzing the processed remaining signal to identify at least two occurrences of the known position on the cycle of the second vibration in the processed remaining signal corresponding to at least two occurrences of the known position on the cycle of the second vibration comprises analyzing the processed remaining signal to identify at least two adjacent occurrences of the known position on the cycle of the second vibration in the processed remaining signal corresponding to at least two adjacent occurrences of the known position on the cycle of the second vibration.

10. The method according to claim 2, wherein the at least two occurrences of the known position on the cycle of the second vibration are at least two occurrences of peaks of the second vibration, wherein analyzing the processed remaining signal to identify at least two occurrences of peaks of the second vibration in the processed remaining signal corresponding to at least two occurrences of peaks of the second vibration comprises analyzing the processed remaining signal to identify at least two adjacent occurrences of peaks of the second vibration in the processed remaining signal corresponding to at least two adjacent occurrences of peaks of the second vibration.

11. The method according to claim 10, wherein determining the second vibration rate from the at least two occurrences of peaks of the second vibration in the processed remaining signal comprises determining the second vibration rate from the at least two adjacent occurrences of peaks of the second vibration in the processed remaining signal.

12. The method according to claim 2, wherein determining an approximation of the first vibration from the signal representative of R(t) comprises:

analyzing the signal representative of R(t) to identify at least two occurrences of a known position on a cycle of the first vibration in the signal representative of R(t) corresponding to at least two occurrences of the known position on the cycle of the first vibration; and

separating the signal representative of R(t) into segments between locations of known positions on the cycle of the first vibration in the signal representative of R(t) of the at least two occurrences of the known position on the cycle of the first vibration in the signal representative of R(t) and fitting a curve fit to the first vibration, wherein the curve fit is the approximation of the first vibration, wherein the at least two occurrences of the known position on the cycle of the first vibration in the signal representative of R(t) are at least two peaks of the first vibration in the signal representative of R(t), wherein the at least two occurrences of the known position on

the cycle of the second vibration in the processed remaining signal are at least two peaks of the second vibration in the processed remaining signal.

13. The method according to claim 1, wherein the first vibration amplitude is larger than the second vibration amplitude.

14. The method according to claim 1, wherein the target is selected from the group consisting of a human and an animal, wherein the first vibration is a respiration of the target and the second vibration is a heartbeat of the target.

15. A non-transitory computer readable medium containing a set of instructions that when executed cause a computer to perform a method, wherein the method comprises:

transmitting a transmit signal from a transmitting antenna at a target such that the transmit signal is reflected by the target to create a reflected signal, wherein the transmit signal and the reflected signal are electromagnetic signals having a wavelength, A, where the transmit signal is represented as T(t) = cos(wt + ɸ(t)) and the reflected signal is represented as R(t) = cos(w(t ‒ td) + ɸ(t ‒ td)), where td is a a time period the transmit signal travels from the transmitting antenna to the target and the reflected signal travels from the target to the receiving antenna;

receiving the reflected signal via a receiving antenna to create a receive signal, wherein the target is vibrating with a first vibration at a first vibration rate and a first vibration amplitude, wherein the target is vibrating with a second vibration at a second vibration rate and a second vibration amplitude, wherein a transmit distance between the transmitting antenna and the target and a receive distance between the target and the receiving antenna are such that ɸ(t ‒ td) ≈ ɸ(t) and the receive signal is approximated as R(t) ≈ I(t) cos (ωt + ɸ(t)) + Q(t) sin (ωt + ɸ(t)), where

I(t) = cos (4πd/λ), Q(t) = sin (4πd/λ);

determining an approximation of the first vibration from a signal representative of R(t);

subtracting the approximation of the first vibration from the signal representative of R(t) to produce a remaining signal;

processing the remaining signal to produce a processed remaining signal; and

analyzing the processed remaining signal to identify at least two occurrences of a known position on a cycle of the second vibration in the processed remaining signal corresponding to at least two occurrences of the known position on the cycle of the second vibration, wherein identification of occurrences of the known position on the cycle of the second vibration in the processed remaining signal is enhanced compared to identifying the remaining signal.

16. The medium according to claim 15, further comprising:

determining the second vibration rate from a corresponding at least two locations of the at least two occurrences of the known position on the cycle of the second vibration in the processed remaining signal.

17. The medium according to claim 15, wherein the signal representative of R(t) is B(t), wherein B(t) is a baseband signal produced by combining I(t) and Q(t) such that B(t) = I(t) + jQ(t) = exp(J4πd0/λ) exp(j(4πxh(t) + 4πxr(t))/λ), where d = tdc/2 and d = d0 + xh(t) + xr(t).

18. The medium according to claim 15, wherein determining an approximation of the first vibration from the signal representative of R(t) comprises:

analyzing the signal representative of R(t) to identify at least two occurrences of a known position on a cycle of the first vibration in the signal representative of R(t) corresponding to at least two occurrences of the known position on the cycle of the first vibration;

separating the signal representative of R(t) into segments between locations of known positions on the cycle of the first vibration in the signal representative of R(t) of the at least two occurrences of the known position on the cycle of the first vibration in the signal representative of R(t) and fitting a curve fit to the first vibration, wherein the curve fit is the approximation of the first vibration.

19. The medium according to claim 15, wherein the at least two occurrences of the known position on the cycle of the second vibration in the processed remaining signal are at least two peaks of the second vibration in the processed remaining signal.

20. The medium according to claim 18, wherein the at least two occurrences of the known position on the cycle of the first vibration in the signal representative of R(t) are at least two peaks of the first vibration in the signal representative of R(t).

21. The medium according to claim 15, wherein the at least two peaks of the first vibration are at least two adjacent peaks of the first vibration.

22. The medium according to claim 21, wherein separating the signal representative of R(t) into segments between peaks of the at least two peaks of the first vibration in the signal representative of R(t) comprises separating the signal representative of R(t) into segments between adjacent peaks of the at least two adjacent peaks of the first vibration in the signal representative of R(t).

23. The medium according to claim 15, wherein analyzing the processed remaining signal to identify at least two occurrences of the known position on the cycle of the second vibration in the processed remaining signal corresponding to at least two occurrences of the known position on the cycle of the second vibration comprises analyzing the processed remaining signal to identify at least two adjacent occurrences of the known position on the cycle of the second vibration in the processed remaining signal corresponding to at least two adjacent occurrences of the known position on the cycle of the second vibration.

24. The medium according to claim 16, wherein the at least two occurrences of the known position on the cycle of the second vibration are at least two occurrences of peaks of the second vibration, wherein analyzing the processed remaining signal to identify at least two occurrences of peaks of the second vibration in the processed remaining signal corresponding to at least two occurrences of peaks of the second vibration comprises analyzing the processed remaining signal to identify at least two adjacent occurrences of peaks of the second vibration in the processed remaining signal corresponding to at least two adjacent occurrences of peaks of the second vibration.

25. The medium according to claim 24, wherein determining the second vibration rate from the at least two occurrences of peaks of the second vibration in the processed remaining signal comprises determining the second vibration rate from the at least two adjacent occurrences of peaks of the second vibration in the processed remaining signal.

26. The medium according to claim 16, wherein determining an approximation of the first vibration from the signal representative of R(t) comprises:

analyzing the signal representative of R(t) to identify at least two occurrences of a known position on a cycle of the first vibration in the signal representative of R(t) corresponding to at least two occurrences of the known position on the cycle of the first vibration;

separating the signal representative of R(t) into segments between locations of known positions on the cycle of the first vibration in the signal representative of R(t) of the at least two occurrences of the known position on the cycle of the first vibration in the signal representative of R(t) and fitting a curve fit to the first vibration, wherein the curve fit is the approximation of the first vibration, wherein the at least two occurrences of the known position on the cycle of the first vibration in the signal representative of R(t) are at least two peaks of the first vibration in the signal representative of R(t), wherein the at least two occurrences of the known position on the cycle of the second vibration in the processed remaining signal are at least two peaks of the second vibration in the processed remaining signal.

27. The medium according to claim 15, wherein the first vibration amplitude is larger than the second vibration amplitude.

28. The medium according to claim 15, wherein the target is reflected from the group consisting of a human and an animal, wherein the first vibration is a respiration of the target and the second vibration is a heartbeat of the target.

29. An apparatus, comprising:

a transmitter, wherein the transmitter is configured to transmit a transmit signal from a transmitting antenna at a target such that the transmit signal is reflected by the target to create a reflected signal, wherein the transmit signal and the reflected signal are electromagnetic signals having a wavelength, λ, where the transmit signal is represented as T(t) = cos(ωt + ɸ(t)) and the reflected signal is

represented as R(t) = cos(ω(t ‒ td) + ɸ(t ‒ td)), where td is a time period the transmit signal travels from the transmitting antenna to the target and the reflected signal travels from the target to the receiving antenna;

a receiver, wherein the receiver is configured to receive the reflected signal via a receiving antenna to create a receive signal, wherein the target is vibrating with a first vibration at a first vibration rate and a first vibration amplitude, wherein the target is vibrating with a second vibration at a second vibration rate and a second vibration amplitude, wherein a transmit distance between the transmitting antenna and the target and a receive distance between the target and the receiving antenna are such that ɸ(t ‒ td) ≈ ɸ(t) and the receive signal is approximated as R(t) ≈ I(t) cos (ωt + ɸ(t)) + Q(t) sin (ωt + ɸ(t)), where I(t) = cos (4πd/λ), Q(t) = sin (4πd/λ);

a processor, wherein the processor is configured to:

determine an approximation of the first vibration from a signal representative of R(t);

subtract the approximation of the first vibration from the signal representative of R(t) to produce a remaining signal;

process the remaining signal to produce a processed remaining signal; and

analyze the processed remaining signal to identify at least two occurrences of a known position on a cycle of the second vibration in the processed remaining signal corresponding to at least two occurrences of the known position on the cycle of the second vibration, wherein identification of occurrences of the known position on the cycle of the second vibration in the processed remaining signal is enhanced compared to identifying the remaining signal.

30. The apparatus according to claim 29, wherein the processor is configured to: determine the second vibration rate from a corresponding at least two locations of the at least two occurrences of the known position on the cycle of the second vibration in the processed remaining signal.

31. The apparatus according to claim 29, wherein the signal representative of R(t) is B(t), wherein B(t) is a baseband signal produced by combining I(t) and Q(t) such that B(t) = I(t) + jQ(t) = exp(j4πd0/λ) exp(j(4πxh(t) + 4πxr(t))/λ), where d = tdc/2 and d = d0 + xh(t) + xr(t).

32. The apparatus according to claim 29, wherein the processor is configured to determine an approximation of the first vibration from the signal representative of R(t) via:

analyzing the signal representative of R(t) to identify at least two occurrences of a known position on a cycle of the first vibration in the signal representative of R(t) corresponding to at least two occurrences of the known position on the cycle of the first vibration; and

separating the signal representative of R(t) into segments between locations of known positions on the cycle of the first vibration in the signal representative of R(t) of the at least two occurrences of the known position on the cycle of the first vibration in the signal representative of R(t) and fitting a curve fit to the first vibration, wherein the curve fit is the approximation of the first vibration.

33. The apparatus according to claim 29, wherein the at least two occurrences of the known position on the cycle of the second vibration in the processed remaining signal are at least two peaks of the second vibration in the processed remaining signal.

34. The apparatus according to claim 32, wherein the at least two occurrences of the known position on the cycle of the first vibration in the signal representative of R(t) are at least two peaks of the first vibration in the signal representative of R(t).

35. The apparatus according to claim 34, wherein the at least two peaks of the first vibration are at least two adjacent peaks of the first vibration.

36. The apparatus according to claim 35, wherein separating the signal representative of R(t) into segments between peaks of the at least two peaks of the first vibration in the signal representative of R(t) comprises separating the signal representative of R(t) into segments between adjacent peaks of the at least two adjacent peaks of the first vibration in the signal representative of R(t).

37. The apparatus according to claim 29, wherein analyzing the processed remaining signal to identify at least two occurrences of the known position on the cycle of the second vibration in the processed remaining signal corresponding to at least two occurrences of the known position on the cycle of the second vibration comprises analyzing the processed remaining signal to identify at least two adjacent occurrences of the known position on the cycle of the second vibration in the processed remaining signal corresponding to at least two adjacent occurrences of the known position on the cycle of the second vibration.

38. The apparatus according to claim 30, wherein the at least two occurrences of the known position on the cycle of the second vibration are at least two occurrences of peaks of the second vibration, wherein analyzing the processed remaining signal to identify at least two occurrences of peaks of the second vibration in the processed remaining signal corresponding to at least two occurrences of peaks of the second vibration comprises analyzing the processed remaining signal to identify at least two adjacent occurrences of peaks of the second vibration in the processed remaining signal corresponding to at least two adjacent occurrences of peaks of the second vibration.

39. The apparatus according to claim 38, wherein determining the second vibration rate from the at least two occurrences of peaks of the second vibration in the processed remaining signal comprises determining the second vibration rate from the at least two adjacent occurrences of peaks of the second vibration in the processed remaining signal.

40. The apparatus according to claim 30, wherein determining an approximation of the first vibration from the signal representative of R(t) comprises:

analyzing the signal representative of R(t) to identify at least two occurrences of a known position on a cycle of the first vibration in the signal representative of R(t) corresponding to at least two occurrences of the known position on the cycle of the first vibration;

separating the signal representative of R(t) into segments between locations of known positions on the cycle of the first vibration in the signal representative of R(t) of the at least two occurrences of the known position on the cycle of the first vibration in the signal representative of R(t) and fitting a curve fit to the first vibration, wherein the curve fit is the approximation of the first vibration, wherein the at least two occurrences of the known position on the cycle of the first vibration in the signal representative of R(t) are at least two peaks of the first vibration in the signal representative of R(t), wherein the at least two occurrences of the known position on the cycle of the second vibration in the processed remaining signal are at least two peaks of the second vibration in the processed remaining signal.

41. The apparatus according to claim 29, wherein the first vibration amplitude is larger than the second vibration amplitude.

42. The apparatus according to claim 29, wherein the target is selected from the group consisting of a human and an animal, wherein the first vibration is a respiration of the target and the second vibration is a heartbeat of the target.