Strap band for a wearable device

摘要

A strap band including a flexible wire bus having electrodes and wires coupled with the electrodes is described. The strap band may be coupled with a device that includes circuitry configured to drive signals on some of the electrodes and receive signals from pickup electrodes. Driven electrodes are coupled with drive signals at different frequencies that may be varied to increase or decrease signal penetration depth to sense different body structures positioned at different depths in a body portion be sensed. Different frequencies for different types of measurements may be selected to optimize sensing different biometric parameters, such as bio-impedance, galvanic skin response, hear rate, respiration, heart rate variability, hydration, inflammation, stress, and arousal in sympathetic nervous system at different depths (e.g., layers or strata) in the body portion, for example. A first set of driven/pickup electrodes may sense different biometric parameters than a second set of driven/pickup electrodes.

主权项

1. A system, comprising:
a strap band including an encapsulated wire bus having electrodes connected with the wire bus, the wire bus including wires, each wire connected with one of the electrodes, wherein the electrodes include drive electrodes and pickup electrodes, a band; and a device including circuitry coupled with the wires, the band and the strap band coupled to the device at opposing ends of the device, the circuitry including a processor in communication with a control unit, the control unit including a bio-impedance unit coupled with the electrodes and configured to couple a first of the drive electrodes with a first signal from a first variable frequency signal source and a second of the drive electrodes with a second signal from a second variable frequency signal source, a first frequency of the first signal is different than a second frequency of the second signal, the bio-impedance unit configured to select the first frequency based on a first biometric measurement type to be sensed using the first of the drive electrodes and a first of the pickup electrodes, and to select the second frequency based on a second biometric measurement type to be sensed using the second of the drive electrodes and a second of the pickup electrodes, second biometric measurement type is different than the first biometric measurement type.