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JP-7857021-B2 - Biosignal measurement device, biosignal measurement system

JP7857021B2JP 7857021 B2JP7857021 B2JP 7857021B2JP-7857021-B2

Inventors

  • 田中 昭生

Assignees

  • 田中 昭生

Dates

Publication Date
20260512
Application Date
20210916
Priority Date
20200921

Claims (2)

  1. A biosignal measurement device that is attached to the surface of a living organism, An optical transmitting and receiving unit (101) consisting of at least one set of optical transmitters and optical receivers arranged on the first surface of the biological surface, An external structure (301) consisting of the part of the glasses that passes through the region surrounded by the back of the ear and the temporal region of the living body , With respect to the first surface, the direction perpendicular to the outside of the living body is defined as "up," and there is a cavity (102a) located directly above the optical transmitting/receiving unit that is movable and fixed to the external structure, and a stress transmission unit (102) is located at the bottom surface of the cavity that transmits stress (302) applied from the external structure to the optical transmitting/receiving unit, A communication unit (103) that transmits the received signal from the optical receiver to another communication unit, A power supply unit (104) that supplies power to the optical transceiver unit and the communication unit, An outer shell structure (201) having at least three surfaces that house the optical transmitting/receiving unit, the communication unit, and the power supply unit, and together with the optical transmitting/receiving unit, transmit the stress to the biological surface in a region surrounded by the back of the ear and the temporal region , A biosignal measurement device characterized by having the following features.
  2. An optical transmission and reception means comprising at least one set of optical transmission means and optical reception means for measuring biological information by the exchange of light with a living organism, An outer shell structure having at least three surfaces and housing the aforementioned optical transmitting and receiving means, An external structure consisting of a part of eyeglasses that passes through the region surrounded by the back of the ear and the temporal region of the living organism , The external structure has a cavity that provides movable fixation and is equipped with a stress transmission means that transmits stress from the external structure to the optical transmitting and receiving means, The stress transmission means is moved in the portion of the eyeglasses that constitutes the region surrounded by the back of the ear and the side of the head. A method for measuring biosignals, comprising bringing the aforementioned outer shell structure into contact with the skin in the region surrounded by the back of the ear and the temporal region.

Description

This invention relates to a biosignal measurement device and biosignal measurement system that is robust against motion artifacts (MA), or fluctuations in measurement signals caused by biological movement, and more particularly to a biosignal measurement device and biosignal measurement system that use light. While oximeters and heart rate monitors that clip onto fingers or earlobes have been widely used for a long time, they can only be used at rest. Wristwatch-type heart rate monitors are also popular, but they have problems such as displaying inaccurate heart rates or showing missing values during exercise. In contrast, as an example that considers portability, Patent Document 1 describes an oximeter and pressure gauge in the shape of goggles for measuring the temporal lobe. The oximeter and pressure gauge are placed inside a waterproof housing. The position can be adjusted by setting the waterproof housing on a belt and sliding it, but the housing extending from the belt has the disadvantage of being heavy and having a cantilevered structure, making it susceptible to vibration. Patent document 2 provides an example of a mask-shaped respiratory interface for nasal and oral patients. It is inserted into the nostrils or mouth. The interface device has an emitter and detector for an optical sensor in the upper lip portion. However, this also has a large housing and suffers from vibration when moved. Non-patent document 1 provides an example of an ear-mounted sensor. It uses a PPG (Photoplethysmography) sensor attached to the earlobe. A neodymium magnet is used to secure it to the earlobe. It also has an accelerometer used to suppress MA (Motion Artifact). However, the magnet itself acts as a weight, causing it to vibrate like a swing in the earlobe, which is a drawback. Patent Document 3 provides an example of a nasal-mounted PPG sensor. It is used by being fixed to the nasal ala with a clip. However, the nasal ala itself has the problem of expanding and contracting with breathing and talking, and because the nasal ala is a thin, movable part, it has the disadvantage of being easily displaced and vibrated by the weight of the sensor and wires. Non-patent document 2 provides an example of a photoplethysmograph worn on the upper arm. It uses a nylon band with an air pad underneath, and the photoplethysmograph is mounted below the air pad. Motion artifacts (MA) are reduced by controlling the pressure of the air pad. However, this method has the drawback of being a large and cumbersome device. U.S. Patent Application Publication No. 2019/0365302U.S. Patent Application Publication No. 2014/0094669U.S. Patent Application Publication No. 2014/0005557 IEEE Transactions on Information Technology in Biomedicine, (USA), 2010, Vol. 14, No. 3, p.786-794Masaki Sekine, et al., "Research on the Removal of Motion Artifacts Superimposed on Photoplethysmography Signals," Descente Sports Science, Descente Sports Science Promotion Foundation, June 6, 2014, Vol. 35, No. 6, pp. 123-130. This is a block diagram of the first embodiment of a biosignal measurement device.This is a block diagram of Embodiment 1 relating to the first embodiment.This is a configuration diagram of Embodiment 1 relating to the first embodiment.This is an external view of Embodiment 1 relating to the first embodiment.This is an overhead view of Embodiment 1 relating to the first embodiment.This is a diagram showing the configuration of Embodiment 2 related to the first embodiment.This is an overhead view of Embodiment 2 relating to the first embodiment.This is a configuration diagram of Embodiment 3 relating to the first embodiment.This is an overhead view of Embodiment 3 relating to the first embodiment.This is an overhead view of Embodiment 4 relating to the first embodiment.This is a diagram showing the configuration of Embodiment 5 related to the first embodiment.This is a diagram showing the configuration of Embodiment 5 related to the first embodiment.This is an overhead view of Embodiment 5 relating to the first embodiment.This is an overhead view of Embodiment 6 relating to the first embodiment.This is a diagram showing the configuration of Embodiment 6 related to the first embodiment.This is an overhead view (a) of Embodiment 6 relating to the first embodiment.This is an overhead view (b) of Embodiment 6 relating to the first embodiment.This is a configuration diagram of Embodiment 7 relating to the first embodiment.This is an external view of Embodiment 7 relating to the first embodiment.This is an overhead view of Embodiment 7 relating to the first embodiment.This is a diagram illustrating the configuration of a second embodiment of the biosignal measurement device.This figure shows the effect of stress in the second embodiment.This is an external view of Embodiment 8 relating to the second embodiment.This is an overhead view of Embodiment 8 relating to the second embodiment.This is a diagram illustrating the configuration of a third embodiment