Radar device for toilets

1 . A measurement method of a urine stream of a user during urination to identify a user, the measuring method using a radar sensor and comprising:

emitting, by the radar sensor, at least one radar signal in a direction of the urine stream,

receiving, by the radar sensor, a reflected radar signal, the received radar signal comprising reflections of the emitted signal, the reflections being caused by at least the urine stream,

processing, the received radar signal, to determine at least one property relating to the urine stream, said at least one property determined by said processing including a dispersion level of the urine stream and at least one of (i) a distance between the origin of a urine front of the urine stream and the radar sensor and (ii) a maximum measured velocity of the urine stream, and

assigning the urine stream to a user profile on the basis of the at least one property of the urine stream.

2 . The measurement method according to claim 1 , wherein said distance is obtained by:

identifying a radial velocity of interest related to a maximum radial velocity of the urine front of the urine stream, and

obtaining a radial distance corresponding to said radial velocity of interest, said radial distance corresponding to the distance.

3 . The measurement method according to claim 1 , wherein said dispersion level is obtained by calculating a reflection level of the reflected radar signals.

4 . The measurement method according to claim 1 , wherein the assigning comprises an assignment between a user profile associated with a male and a user profile associated with a female.

5 . The measurement method according to claim 4 , wherein the assignment is made by classification on the basis of at least one property relating to the urine stream and a classification function.

6 . The measurement method according to claim 1 , wherein the radar sensor operates per frame, each frame being generated by a plurality of chirps, and transmission and reception steps being carried out for each chirp.

7 . The measurement method according to claim 1 , wherein the radar sensor is a Frequency Modulated Continuous Wave, FMCW, radar sensor, or the radar signal is FMCW.

8 . The measurement method according to claim 1 , wherein the signal processing comprises calculation of at least one range-doppler response.

9 . The measurement method according to claim 1 , further comprising a prior step, using a urine detector, of determining the presence of a urine stream, the method comprising, in response to said detection, a step of activating the radar sensor.

10 . A non-transitory computer-readable medium including a computer program comprising instructions to implement a measurement method according to claim 1 when the instructions are executed by a processor.

11 . A radar device comprising:

a housing adapted to be positioned on an internal wall of a toilet bowl,

a radar sensor, housed in the housing, and adapted to emit radar waves in a direction of the toilet bowl opening, the radar sensor being adapted to implement the method according to claim 1 .

12 . The radar device according to claim 11 , wherein the radar sensor is a Frequency Modulated Continuous Wave, FMCW, radar sensor.

13 . The radar device according to claim 11 , comprising a urine detector adapted to detect a stream of urine, the urine detector being configured to activate the radar sensor in response to a detection of the stream of urine.

14 . A urine analysis device, comprising:

a radar device according to claim 11 ,

a collection port on the housing for receiving urine,

a test set for analyzing the urine received.

15 . The measurement method according to claim 1 , wherein the processing comprises determining from the received radar signal said dispersion level of the urine stream, said distance between the origin of the urine front of the urine stream and the radar sensor, and said maximum measured velocity of the urine stream.

16 . The measurement method according to claim 1 , wherein the at least one property is determined based only on the received radar signal.

17 . A measurement method of a urine stream of a user during urination to identify a user, the measuring method using a radar sensor and comprising:

emitting, by the radar sensor, at least one radar signal in a direction of the urine stream,

receiving, by the radar sensor, a reflected radar signal, the received radar signal comprising reflections of the emitted signal, the reflections being caused by at least the urine stream,

processing, the received radar signal, to determine at least one property relating to the urine stream, said at least one property including one or more of (i) a distance between an origin of a urine front of the urine stream and the radar sensor, (ii) a maximum measured velocity of the urine stream and (iii) a dispersion level of the urine stream, and

assigning the urine stream to a user profile on the basis of the at least one property of the urine stream, wherein the radar sensor is included in a urine analysis device having a front surface and a back surface, the back surface adapted to be positioned against an internal wall of a toilet bowl, the urine analysis device comprising a urine collection orifice provided on the back surface.

18 . A radar device comprising:

a housing adapted to be positioned on an internal wall of a toilet bowl,

a radar sensor, housed in the housing, and adapted to emit radar waves in a direction of the toilet bowl opening, the radar sensor being adapted to implement the method according to claim 17 .

19 . A urine analysis device, comprising:

a radar device according to claim 18 ,

a collection port on the housing for receiving urine,

a test set for analyzing the urine received.