JPWO2020078962A5

JPWO2020078962A5 -

Info

Publication number: JPWO2020078962A5
Application number: JP2021520362A
Authority: JP
Publication date: 2022-10-25
Anticipated expiration: 2039-10-15

Claims

at least two skin interface units for electrically interfacing with the subject's skin, a first skin interface unit for coupling the generated signal into the body; and a second skin interface unit for sensing at a remote location on the subject's skin, wherein one of the first and second skin interface units is located at a known location on the body. at least two skin interface units positioned;
controlling signal generation and sensing using the skin interface unit, in one control mode based on signal characteristics sensed at the second skin interface unit and one or more predetermined body transmission parameters; , a controller operable to determine an indication of the position of one of said first and second skin interface units;
An on-body sensor system comprising:
The controller, in a further control mode, is operable to perform a recalibration procedure to redetermine the body transmission parameters based on known initial positions of the first and second skin interface units. , the recalibration procedure is
controlling the first skin interface unit to generate one or more reference signals;
sensing the reference signal at the second skin interface unit, and determining, based on the sensed signal characteristics and the known initial positions of the first and second skin interface units, of the body transmission parameters redetermining at least one of
correcting a predetermined body transfer parameter based on any difference between at least one re-determined body transfer parameter and a corresponding predetermined body transfer parameter;
On-body sensor system, including

said first skin interface unit having a known location, said controller being operable in said one control mode to determine the position of said second skin interface unit, said reconfiguration procedure comprising: 2. The on-body sensor system of claim 1, based on a known location of said first skin interface unit and a known initial position of said second skin interface unit.

3. The on-body sensor system of claim 1 or 2, wherein one or both of the first and second skin interface units take the form of body-worn units.

The first skin interface unit is an on-body unit for attachment to a predetermined area of the skin of the subject or an off-body unit for temporary placement on the predetermined area of the skin of the subject. 4. The on-body sensor system of claim 2 or 3, wherein:

4. The on-body sensor system according to claim 2 or 3, wherein said first skin interface unit is a wearable unit for attachment to a specific part of said body.

6. The on-body sensor system of any one of claims 1-5, wherein at least the second skin interface unit is in the form of a sensor pad for attachment to the skin of the subject.

The one or more body transmission parameters are signal wavelength between two electrode pairs on a given skin interface unit, signal propagation velocity, phase angle difference, signal transmission time between transmission and reception of the signal, 7. The on-body sensor system of any one of claims 1-6, comprising at least one of signal attenuation between transmission and reception of .

The predetermined body transfer parameters include a plurality of sets of predetermined body transfer parameters, each set representing a different specific position of the skin interface unit operable for the controller to determine the position of the skin interface unit. and optionally orientation.

The on-body sensor system is for monitoring one or more physiological parameters of a subject, and the first skin interface unit, in sensing the one or more physiological parameters: 9. An on-body sensor system according to any one of claims 1 to 8, for use.

Correcting the predetermined body transmission parameter comprises:
comparing at least one re-determined body transfer parameter to a corresponding predetermined body transfer parameter and determining a parameter correction factor based on the comparison;
applying the correction factor to each pre-stored body transfer parameter to correct the body transfer parameter;
storing the corrected body transfer parameter instead of the predetermined body transfer parameter;
10. The on-body sensor system of any one of claims 1-9, comprising:

The controller further according to one control mode performs an initial calibration procedure, determines and stores predetermined said body transmission parameters based on signal characteristics measured at said second skin interface unit; 11. The on-body sensor system of any one of claims 1-10, wherein the interface unit is arranged in at least one known set of locations.

The initial calibration procedure includes determining and storing multiple sets of transmission parameters, each set representing a different specific position and optionally of the skin interface unit operable for the controller to determine its position. 12. The on-body sensor system of claim 11, corresponding to the orientation at .

The controller controls one of the skin interface units based on determining an indication of the current position of the skin interface unit using the sensed signal characteristics and the body transmission parameter, according to one control mode. 13. An on-body sensor system according to any one of claims 1 to 12, which guides a user to locate.

A method of configuring an on-body sensor system, comprising:
The on-body sensor system comprises at least two skin interface units for electrically interfacing with the subject's skin, a first skin interface unit for coupling generated signals into the body; a second skin interface unit for sensing the coupled signal at a remote location on the subject's skin, one of the first and second skin interface units being the comprising at least two skin interface units positioned at known locations on the body;
The system determines the position of one of the first and second skin interface units based on signal characteristics sensed at the second skin interface unit and one or more predetermined body transmission parameters. is operable to determine an index of
The method includes
performing a recalibration procedure to redetermine one or more of the body transmission parameters based on the known initial positions of the first and second skin interface units, the recalibration procedure comprising:
controlling the first skin interface unit to generate one or more reference signals and sensing the reference signals at the second skin interface unit;
redetermining at least one of the body transmission parameters based on the sensed signal characteristics and the known initial positions of the two first and second skin interface units;
correcting a predetermined body transfer parameter based on any difference between at least one re-determined body transfer parameter and a corresponding predetermined body transfer parameter;
A method, including

Following the recalibration procedure, the method comprises:
repositioning one of the first and second skin interface units on the body;
determining the position of the repositioned skin interface unit based on sensed signal characteristics at the second skin interface unit and the corrected body transmission parameter;
15. The method of claim 14, further comprising: