Detection device

Abstract

To provide a detection device capable of constantly and easily measuring vital data such as a pulse wave velocity and a blood pressure.SOLUTION: A detection device includes: a first electrode having an inner surface for contact with a finger attached therewith; a second electrode provided outside the first electrode and electrically insulated from the first electrode; a light source provided outside the first electrode and inside the second electrode and emitting the finger with light; a light sensor provided outside the first electrode and inside the second electrode and inputting light from the finger; and a control circuit provided outside the first electrode and inside the second electrode and measuring biological information based on the output of the light sensor. The light source includes at least one of a red light source, an infrared light source, a near infrared light source, and a green light source, and the detection device can be attached to one finger.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a detection device.

Background Art

[0002] Regarding cerebral infarction and myocardial infarction, it is known that arteriosclerosis is one of the causes. Therefore, by predicting arteriosclerosis in advance and taking countermeasures, the occurrence of cerebral infarction and myocardial infarction can be prevented. Arteriosclerosis can be estimated by measuring the pulse wave propagation velocity. In addition, an oxygen saturation measuring device that is attached to a living body's finger and measures oxygen saturation based on a pulse wave measured from the artery of the living body's finger is known (for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] To measure the pulse wave propagation velocity, an electrocardiograph or a photoelectric sensor attached to the fingertip is required. In that case, the device for measurement is large, and it is difficult to measure constantly and easily.

[0005] The present invention has been made in view of the above, and its object is to provide a detection device that can constantly and easily measure vital data such as pulse wave velocity and blood pressure.

Means for Solving the Problems

[0006] To solve the above-mentioned problems and achieve the objective, a detection device according to one aspect of the present disclosure includes: a first electrode having an inner surface for contacting a finger to which it is attached; a second electrode provided outside the first electrode and electrically insulated from the first electrode; a light source provided outside the first electrode and inside the second electrode for irradiating the finger with light; a light sensor provided outside the first electrode and inside the second electrode for receiving light from the finger as input; and a control circuit provided outside the first electrode and inside the second electrode for measuring biological information based on the output of the light sensor, wherein the light source includes at least one of a red light source, an infrared light source, a near-infrared light source, and a green light source, is wearable on one finger, and is provided on the outer surface of the second electrode The first and second The insulating portion further includes the portion of the outer surface of the second electrode that comes into contact with the other finger adjacent to the first finger. The first and second An insulating part is provided. The second electrode is provided so as to cover the outside of the first electrode in a full circle, the first insulating portion covers a portion of the outer circumference of the second electrode, and the second insulating portion covers another portion of the outer circumference of the second electrode, and the first insulating portion and the second insulating portion are provided at positions opposite each other with the second electrode in between. It is a detection device. A detection device according to one aspect of the present disclosure includes: a first electrode having an inner surface for contacting a finger that is worn on it; a second electrode provided outside the first electrode and electrically insulated from the first electrode; a light source provided outside the first electrode and inside the second electrode for irradiating the finger with light; a light sensor provided outside the first electrode and inside the second electrode for receiving light from the finger as input; and a control circuit provided outside the first electrode and inside the second electrode for measuring biological information based on the output of the light sensor, wherein the light source includes at least one of a red light source, an infrared light source, a near-infrared light source, and a green light source, is wearable on one finger, and is provided on the outer surface of the second electrode. The first and second Further including an insulating part, The second electrode is provided so as to cover the outside of the first electrode in a full circle, the first insulating portion covers a portion of the outer circumference of the second electrode, and the second insulating portion covers another portion of the outer circumference of the second electrode, and the first insulating portion and the second insulating portion are provided at positions opposite each other with the second electrode in between. Of the outer surface of the second electrode, the portion that does not come into contact with the finger adjacent to the aforementioned finger is the same. The first and second This detection device does not have an insulating section. A detection device according to one aspect of the present disclosure includes: a first electrode having an inner surface for contacting a finger to which it is attached; a second electrode provided outside the first electrode and electrically insulated from the first electrode; a light source provided outside the first electrode and inside the second electrode for irradiating the finger with light; a light sensor provided outside the first electrode and inside the second electrode for receiving light from the finger as input; and a control circuit provided outside the first electrode and inside the second electrode for measuring biological information based on the output of the light sensor, wherein the light source includes at least one of a red light source, an infrared light source, a near-infrared light source, and a green light source, and is wearable on one finger. The second electrode further includes first and second insulating portions provided on the outer surface of the second electrode, wherein the second electrode is provided so as to cover the outside of the first electrode in a whole circle, the first insulating portion covers a portion of the outer circumference of the second electrode, the second insulating portion covers another portion of the outer circumference of the second electrode, and the first insulating portion and the second insulating portion are provided at positions opposite each other with the second electrode in between. The detection device is provided with the second electrode in a portion of the finger that is not in contact with other fingers adjacent to the aforementioned finger, and the second electrode is not provided in a portion of the finger that is in contact with other fingers adjacent to the aforementioned finger. A detection device according to one aspect of the present disclosure includes: a first electrode having an inner surface for contacting a finger that is fitted; a second electrode provided outside the first electrode and electrically insulated from the first electrode; a light source provided outside the first electrode and inside the second electrode for irradiating the finger with light; a light sensor provided outside the first electrode and inside the second electrode for receiving light from the finger as input; a control circuit provided outside the first electrode and inside the second electrode for measuring biological information based on the output of the light sensor; and the fitting position of the second electrode and the biological information chest The system includes a storage unit for storing the distance to a position, a potential difference measurement circuit for measuring the potential difference between the first electrode and the second electrode, and a control unit for calculating pulse wave velocity based on the potential difference measured by the potential difference measurement circuit and the distance stored in the storage unit, wherein the control unit calculates the distance between the attachment position of the second electrode and the biological body based on the time difference between the time corresponding to the feature point of the electrocardiogram, which is the waveform of the potential difference measured by the potential difference measurement circuit, and the time corresponding to the feature point of the pulse wave, which is biological information measured based on the output of the optical sensor. chest The pulse wave velocity is calculated by dividing it by the distance to the position, and the light source is a detection device that can be worn on one finger and includes at least one of a red light source, an infrared light source, a near-infrared light source, and a green light source. A detection device according to one aspect of the present disclosure includes: a first electrode having an inner surface for contacting a finger to which it is attached; a second electrode provided outside the first electrode and electrically insulated from the first electrode; a light source provided outside the first electrode and inside the second electrode for irradiating the finger with light; a light sensor provided outside the first electrode and inside the second electrode for receiving light from the finger as input; and a control circuit provided outside the first electrode and inside the second electrode for measuring biological information based on the output of the light sensor, wherein the light source includes at least one of a red light source, an infrared light source, a near-infrared light source, and a green light source, is wearable on one finger, and further includes a temperature sensor for detecting the temperature of the first electrode; the control circuit calculates a pulse frequency based on the output waveform of the light sensor, transmits the pulse frequency data to another device when the difference between the temperature change frequency detected by the temperature sensor and the pulse frequency fluctuation value is within a predetermined range, and does not transmit the pulse frequency data to the other device when the difference is not within a predetermined range. A detection device according to one aspect of the present disclosure includes: a first electrode having an inner surface for contacting a finger to which it is attached; a second electrode provided outside the first electrode and electrically insulated from the first electrode; a light source provided outside the first electrode and inside the second electrode for irradiating the finger with light; a light sensor provided outside the first electrode and inside the second electrode for receiving light from the finger as input; and a control circuit provided outside the first electrode and inside the second electrode for measuring biological information based on the output of the light sensor, wherein the light source includes at least one of a red light source, an infrared light source, a near-infrared light source, and a green light source, is wearable on one finger, and further includes an acceleration sensor for detecting acceleration applied to the device, and the control circuit calculates a pulse frequency based on the output waveform of the light sensor, and when the difference between the frequency of the change in acceleration detected by the acceleration sensor and the fluctuation value of the pulse frequency is within a predetermined range, the pulse frequency data is not transmitted to another device, and when the difference is not within a predetermined range, the pulse frequency data is transmitted to the other device. A detection device according to one aspect of the present disclosure includes: a first electrode having an inner surface for contacting a finger that is attached; a second electrode provided outside the first electrode and electrically insulated from the first electrode; a light source provided outside the first electrode and inside the second electrode for irradiating the finger with light; a photosensor provided outside the first electrode and inside the second electrode for receiving light from the finger as input; and a control circuit provided outside the first electrode and inside the second electrode for measuring biological information based on the output of the photosensor, wherein the light source includes at least one of a red light source, an infrared light source, a near-infrared light source, and a green light source, is wearable on one finger, and further includes a battery for supplying power to various parts within the device, and a coil for charging the battery based on a given magnetic field, wherein the coil has a winding wound along the outer circumference of the first electrode, located outside the first electrode and inside the second electrode, and the coil includes a first coil and a second coil, the first coil and the second coil being located on opposite sides of each other with respect to the direction of insertion of the finger into the device. [Brief explanation of the drawing]

[0007] [Figure 1] Figure 1 is an external view showing a detection device according to an embodiment. [Figure 2] Figure 2 shows the internal structure of the detection device shown in Figure 1. [Figure 3] Figure 3 shows a cross-section taken along the line X-X' in Figure 2. [Figure 4] Figure 4 shows a cross-section obtained by cutting along the line Y-Y' in Figure 2. [Figure 5] Figure 5 is a block diagram showing an example of the internal configuration of a control circuit. [Figure 6] Figure 6 illustrates an example of how to use the detection device. [Figure 7] Figure 7 illustrates an example of how to use the detection device. [Figure 8] Figure 8 is a diagram illustrating the method for calculating pulse wave velocity. [Figure 9] Figure 9 illustrates the charging method for the detection device. [Figure 10] Figure 10 is a schematic diagram showing an example of a charging adapter. [Figure 11] Figure 11 is a diagram showing another usage method of the detection device. [Figure 12] Figure 12 is a diagram for explaining the first induction electrocardiogram measurement method. [Figure 13] Figure 13 is a flowchart showing the process of measuring pulse wave velocity and blood pressure by the detection device. [Figure 14] Figure 14 is a flowchart showing the process of measuring respiratory rate by the detection device. [Figure 15] Figure 15 is a flowchart showing the process of removing body movement noise. [Figure 16] Figure 16 is a diagram showing an example of the value of SpO2. [Figure 17] Figure 17 is a flowchart showing the process of measuring blood oxygen concentration by the detection device. [Figure 18] Figure 18 is an external view showing the detection device according to the first modified example. [Figure 19] Figure 19 is a diagram showing the internal structure of the detection device of Figure 18. [Figure 20] Figure 20 is a diagram showing a cross-section cut along the X-X' line in Figure 19. [Figure 21] Figure 21 is a diagram showing a cross-section cut along the Y-Y' line in Figure 19. [Figure 22] Figure 22 is an external view showing the detection device according to the second modified example. [Figure 23] Figure 23 is a diagram showing the internal structure of the detection device of Figure 22. [Figure 24] Figure 24 is a diagram showing a cross-section cut along the X-X' line in Figure 23. [Figure 25] Figure 25 is a diagram showing a cross-section cut along the Y-Y' line in Figure 23.

Embodiments for Carrying Out the Invention

[0008] Embodiments for carrying out the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the embodiments described below. Furthermore, the components described below include those that are easily conceivable by those skilled in the art, and those that are substantially the same. Moreover, the components described below can be combined as appropriate. Furthermore, the disclosure is merely an example, and any modifications that can be easily conceived by those skilled in the art while maintaining the spirit of the invention are naturally included within the scope of the present invention. In addition, the drawings may schematically represent the width, thickness, shape, etc., of each part compared to the actual embodiment in order to clarify the explanation, but these are merely examples and do not limit the interpretation of the present invention. Furthermore, in this specification and in each drawing, elements similar to those described above in previously shown drawings are denoted by the same reference numerals, and detailed explanations may be omitted as appropriate.

[0009] (Configuration of the detection device) Figure 1 is an external view showing a detection device according to an embodiment. In Figure 1, the detection device 100 has the shape of a finger ring. The detection device 100 has a hollow portion 200. A finger can be inserted into the hollow portion 200 of the detection device 100. In other words, the user of the detection device 100 can wear the detection device 100 on one finger.

[0010] In Figure 1, the detection device 100 has an inner electrode 1, which is the first electrode, and an outer electrode 2, which is the second electrode. The inner electrode 1 is a conductor that comes into contact with the finger when the detection device 100 is worn on the finger. When the detection device 100 is worn on the finger, the inner electrode 1 comes into contact with the finger. That is, the inner electrode 1 has an inner surface 110 for contact with the finger on which it is worn. The inner electrode 1 has a plurality of openings 60, 510, 520, etc., as will be described later.

[0011] The outer electrode 2 is located outside the inner electrode 1. The outer electrode 2 is electrically insulated from the inner electrode 1.

[0012] Figure 2 shows the internal structure of the detection device 100 shown in Figure 1. Figure 2 shows a cross-section of the detection device 100 shown in Figure 1, cut by a plane perpendicular to the center line J passing through the center of the hollow section 200. Figure 2 shows a cross-section of the detection device 100 cut by a plane passing through the midpoint in the longitudinal direction of the outer electrode 2 along the center line J. Figure 3 shows a cross-section cut by the line X-X' in Figure 2. Figure 4 shows a cross-section cut by the line Y-Y' in Figure 2.

[0013] In Figure 2, the detection device 100 includes a temperature sensor 3, an acceleration sensor 4, an LED driver 5, a light sensor 6, a short-range wireless communication driver 7, a battery 8, a coil 9, a control circuit 10, a red LED (Light Emitting Diode) 51, a near-infrared LED 52, and a green LED 53. Each of these components is located outside the inner electrode 1 and inside the outer electrode 2, i.e., between the inner electrode 1 and the outer electrode 2. Each of these components is mounted on a flexible substrate 20. Each of these components can exchange signals with each other via the flexible substrate 20.

[0014] The red LED 51 emits red light. The near-infrared LED 52 emits near-infrared light. The green LED 53 emits green light. In other words, the detection device 100 has a light source provided outside the inner electrode 1 and inside the outer electrode 2 (between the inner electrode 1 and the outer electrode 2). The LED driver 5 drives the red LED 51, the near-infrared LED 52, and the green LED 53 to emit light.

[0015] The inner electrode 1 has openings 510, 520, and 530. Opening 510 is located on the inner surface 110 of the inner electrode 1 at a position corresponding to the red LED 51. As can be seen from Figures 2 and 4, the opening 510 is located at a position toward the hollow section 200 from the red LED 51. The red light emitted by the red LED 51 passes through the opening 510 and is irradiated toward the hollow section 200. The red light emitted by the red LED 51 is irradiated onto the finger inserted into the hollow section 200. In other words, the red LED 51 is a light source that irradiates the finger with red light.

[0016] The aperture 520 is located on the inner surface 110 of the inner electrode 1 at a position corresponding to the near-infrared LED 52. The aperture 520 is positioned so that it extends from the near-infrared LED 52 toward the hollow section 200. The near-infrared light emitted by the near-infrared LED 52 passes through the aperture 520 and is irradiated toward the hollow section 200. The near-infrared light emitted by the near-infrared LED 52 is irradiated onto the finger inserted into the hollow section 200. In other words, the near-infrared LED 52 is a light source that irradiates the finger with near-infrared light.

[0017] The opening 530 is located on the inner surface 110 of the inner electrode 1 at a position corresponding to the green LED 53. The opening 530 is positioned so that it is directed from the green LED 53 toward the hollow section 200. The green light emitted by the green LED 53 passes through the opening 530 and is irradiated toward the hollow section 200. The green light emitted by the green LED 53 is irradiated onto the finger inserted into the hollow section 200. In other words, the green LED 53 is a light source that irradiates the finger with green light.

[0018] Furthermore, the inner electrode 1 has an opening 60. The opening 60 is located on the inner surface 110 of the inner electrode 1 at a position corresponding to the light sensor 6. The opening 60 is located in the direction from the hollow portion 200 toward the light sensor 6. The light sensor 6 detects light passing through the opening 60. The light sensor 6 can measure changes in light intensity.

[0019] The light sensor 6 receives light from the red LED 51, near-infrared LED 52, and green LED 53 that has passed through the finger inserted into the hollow section 200 as input. The light sensor 6 detects changes in the intensity of the input light. The light sensor 6 is, for example, an organic photodiode (OPD) and outputs an electrical signal corresponding to the irradiated light.

[0020] If the red LED 51 is lit and the near-infrared LED 52 and green LED 53 are not lit, the red light passing through the finger is input to the light sensor 6. If the near-infrared LED 52 is lit and the red LED 51 and green LED 53 are not lit, the near-infrared light passing through the finger is input to the light sensor 6. If the green LED 53 is lit and the red LED 51 and near-infrared LED 52 are not lit, the green light passing through the finger is input to the light sensor 6.

[0021] The temperature sensor 3 detects the temperature of the inner electrode 1. The inner electrode 1 is in contact with the finger inserted into the hollow portion 200. Therefore, the temperature sensor 3 can also detect the temperature of the finger via the inner electrode 1. It is preferable to cover the temperature sensor 3 and the inner electrode 1 with a heat insulating material (hereinafter referred to as a heat insulating material) so as not to affect the temperature value of the inner electrode 1 detected by the temperature sensor 3. In this example, the flexible substrate 20 is used as the heat insulating material. It is preferable to provide the heat insulating material on the outside of the inner electrode 1 and on the inside of the outer electrode 2 (between the inner electrode 1 and the outer electrode 2) to cover the temperature sensor 3 and the inner electrode 1.

[0022] The acceleration sensor 4 detects the acceleration applied to the detection device 100. The detected value of the acceleration applied to the detection device 100 is used to eliminate the influence of the wearer's body movements on the detection device 100, as will be described later.

[0023] The short-range wireless communication driver 7 has an antenna (not shown). The short-range wireless communication driver 7 transmits and receives signals between the detection device 100 and other devices. The short-range wireless communication driver 7 can transmit data measured by various parts of the detection device 100 to other devices. The short-range wireless communication driver 7 can also receive data transmitted by other devices.

[0024] Battery 8 supplies power to various parts of the detection device 100. Battery 8 is, for example, a lithium-ion battery. Battery driver 81 controls battery 8. Battery 8 is charged by battery driver 81.

[0025] Coil 9 is a charging coil for charging the battery 8. Coil 9 has a winding that is wound along the outer circumference of the inner electrode 1, located outside the inner electrode 1 and inside the outer electrode 2 (between the inner electrode 1 and the outer electrode 2). As will be described later, an induced current flows in coil 9 based on the applied magnetic field. Coil 9 includes coil 91 and coil 92. As shown in Figures 3 and 4, coils 91 and 92 are each wound along the outer circumference of the inner electrode 1. Coil 91 is provided on one end of the outer electrode 2 along the center line J, and coil 92 is provided on the other end of the outer electrode 2 along the center line J. Coils 91 and 92 are connected in parallel to the battery driver 81. Therefore, the battery 8 can be charged by the induced current flowing through either coil 91 or coil 92. The windings of coils 91 and 92 are each covered to maintain insulation.

[0026] The control circuit 10 controls each part of the detection device 100. The control circuit 10 is an IC (Integrated Circuit), such as a microcontroller. The control circuit 10 may also be a PLD (Programmable Logic Device), such as an FPGA (Field Programmable Gate Array).

[0027] Figure 5 is a block diagram showing an example of the internal configuration of the control circuit 10. As shown in Figure 5, the control circuit 10 in this example includes a potential difference measurement circuit 11, a temperature measurement circuit 12, an acceleration measurement circuit 13, an optical pulse wave measurement circuit 14, a memory 15, a communication circuit 16, a power supply circuit 17, and a CPU (Central Processing Unit) 18. These are connected by a bus B, and can exchange data with each other via the bus B.

[0028] The potential difference measurement circuit 11 is connected to the inner electrode 1 and the outer electrode 2. The potential difference measurement circuit 11 detects the potential difference (i.e., electromyographic difference) between the inner electrode 1 and the outer electrode 2.

[0029] The temperature measurement circuit 12 is connected to the temperature sensor 3. The temperature measurement circuit 12 acquires temperature data from the temperature sensor 3.

[0030] The acceleration measurement circuit 13 is connected to the acceleration sensor 4. The acceleration measurement circuit 13 acquires acceleration data from the acceleration sensor 4.

[0031] The optical pulse wave measurement circuit 14 is connected to the LED driver 5 and the light sensor 6. Based on the detection data from the light sensor 6, the optical pulse wave measurement circuit 14 measures pulse frequency, blood oxygen concentration, and other parameters.

[0032] Memory 15 is a storage unit that stores various types of data. Memory 15 may include, for example, RAM (Random Access Memory), ROM (Read Only Memory), EEPROM (Electrically Erasable Programmable Read Only Memory), etc.

[0033] The communication circuit 16 is connected to the short-range wireless communication driver 7. The communication circuit 16 transmits measurement results and other data to an external device. The external device is, for example, a mobile terminal such as a smartphone or tablet held by the user of the detection device 100. Mobile terminals such as smartphones and tablets have a display screen. By displaying the data from the detection device 100 on the screen, the user of the detection device 100 can confirm the data received from the detection device 100.

[0034] The power supply circuit 17 is connected to the battery driver 81. The power supply circuit 17 controls the charging of the battery 8 and supplies power from the battery 8 to various parts.

[0035] The CPU 18 is a control unit that controls each part of the control circuit 10. The CPU 18 measures or calculates biological information such as pulse wave velocity, blood pressure, and pulse frequency by executing a predetermined program.

[0036] (Detection of pulse wave velocity by a detection device) Figures 6 and 7 illustrate an example of how to use the detection device 100. As shown in Figure 6, a person who has attached the detection device 100 to the finger 301 of their hand 300 presses that hand 300 against the surface of their chest M. At this time, the finger 301 is pressed against the surface of the body so that the detection device 100 is positioned near the heart 400 on the chest M of the human body HM.

[0037] Figure 8 illustrates the calculation process for pulse wave velocity. Figure 8 shows the electrocardiogram waveform 401 and the pulse wave waveform 402. The photovoltaic pulse wave of the pulse wave waveform 402 is delayed relative to the peak value of the electrocardiogram waveform 401. The pulse wave velocity PWV is obtained by dividing this delay time PIT by the distance L from the heart to the finger, i.e., the distance L to the detection device 100.

[0038] By pre-memorizing the distance L from the heart to the detection device 100, the pulse wave velocity (PWV) can be calculated by measuring the time PIT. In other words, pulse wave velocity PWV = distance L / time PIT. By using the detection device 100, the pulse wave velocity PWV can be easily measured at all times. Since the pulse wave velocity PWV increases with the progression of arteriosclerosis, measuring it continuously with the detection device 100 allows for early detection of hypertension. For the distance L, for example, an approximate value can be set in advance and stored in the memory 15 mentioned above.

[0039] (Battery charging) Figure 9 illustrates the charging method for the detection device 100. As shown in Figure 9, with the detection device 100 attached to the finger 301, the charging adapter 800 is also attached to the finger 301. The charging adapter 800 is annular in shape, and the finger 301 is inserted into its hollow part. Then, as shown in Figure 9, the detection device 100 and the charging adapter 800 are brought close together while the device is attached to the finger 301. An oscillator 900 is connected to the charging adapter 800. The oscillator 900 outputs an oscillation signal in which the current value changes at a predetermined period.

[0040] Figure 10 is a schematic diagram showing an example of a charging adapter 800. As shown in Figure 10, the charging adapter 800 has a charging coil 801, an inner annular portion 802, and an outer annular portion 803. The charging coil 801 is located outside the inner annular portion 802 and inside the outer annular portion 803. That is, the charging coil 801 is located between the inner annular portion 802 and the outer annular portion 803. The inner annular portion 802 has approximately the same shape as the inner electrode 1 of the detection device 100. The outer annular portion 803 has approximately the same shape as the outer electrode 2 of the detection device 100. The hollow portion 210 inside the inner annular portion 802 is the part into which a finger is inserted. When a finger fitted with the detection device 100 is inserted into the hollow portion 210, the detection device 100 and the charging adapter 800 are attached to the finger 301, as shown in Figure 9.

[0041] When the detection device 100 and charging adapter 800 are attached to the finger 301, the winding of the charging coil 801 is wound coaxially with the inner electrode 1 of the detection device 100. In this state, if an oscillation signal from the oscillator 900 is applied to the coil 801, the magnetic field of the coil 801 changes. Electromagnetic induction caused by the change in the magnetic field of the coil 801 changes the magnetic field applied to the coil 9 inside the detection device 100, causing an induced current to flow through the coil 9. As a result, the induced current flowing through the coil 9 inside the detection device 100 operates the battery driver 81, and the battery 8 is charged. In other words, the coil 9 inside the detection device 100 can charge the battery 8 based on the applied magnetic field.

[0042] As already explained with reference to Figures 3 and 4, the coil 9 in the detection device 100 consists of a first coil, coil 91, and a second coil, coil 92. Coils 91 and 92 are located on opposite sides of each other with respect to the direction in which a finger is inserted into the hollow portion 200 of the detection device 100. As a result, when the detection device 100 and the charging adapter 800 are attached to the finger 301 as shown in Figure 9, the coils 91 or 92 and the charging adapter 800 are in close proximity regardless of the orientation in which the detection device 100 and the charging adapter 800 are attached to the finger. Therefore, when attaching the charging adapter 800 to the finger 301, attention does not need to be paid to the orientation in which the charging adapter 800 is attached. When the charging adapter 800 is in close proximity to the finger, an induced current flows efficiently through coils 91 or 92 due to the magnetic field generated by the charging adapter 800. Therefore, the battery 8 of the detection device 100 can be easily charged by attaching the charging adapter 800 to the finger 301 without worrying about the orientation in which it is attached. Regardless of whether the detection device 100 is attached to the fingers of the right or left hand, the battery 8 of the detection device 100 can be charged by attaching the charging adapter 800 to the finger 301.

[0043] (Other uses of the detection device) Figure 11 shows another way to use the detection device 100. As shown in Figure 11, the detection device 100 is attached to finger 301. In this state, the detection device 100 is brought into close contact with finger 302 on the opposite hand of the same person. For example, if finger 301 is the middle finger of the left hand, then finger 302 is any finger on the right hand of the same person. At this time, the surface of the outer electrode 2 of the detection device 100 is pressed against the surface of finger 302. This allows the pulse wave velocity to be calculated, as explained with reference to Figure 8. The state shown in Figure 11 is a measurement state that approximates the method for measuring lead I electrocardiogram.

[0044] Figure 12 illustrates the method for measuring a lead I electrocardiogram. As shown in Figure 12, the lead I electrocardiogram measurement method involves attaching electrodes to the right wrist RW and left wrist LW of the human body HM, respectively, and obtaining an electrocardiogram using the measuring device 111. Therefore, the other uses of the detection device 100 shown in Figure 11 are similar to the lead I electrocardiogram measurement method. Note that in Figure 11, the detection device 100 may be placed in close contact with the wrist instead of the finger 302.

[0045] (Measurement of pulse wave velocity and blood pressure) Figure 13 is a flowchart showing the process of measuring pulse wave velocity and blood pressure by the detection device 100. In Figure 13, the potential difference measurement circuit 11 described above measures the potential difference between the inner electrode 1 and the outer electrode 2 (step S101). The measured potential difference has a periodic waveform. The measurement result of the potential difference in step S101 is stored in the memory 15 (step S102). The processes of step S101 and step S102 are repeated. The measurement results stored in the memory 15 are analyzed by the control circuit 10 (step S103), and the time of the characteristic points is determined (step S104). Here, the time (let's call it time t1) corresponding to the peak value, which is a characteristic point of the electrocardiogram waveform 401 (see Figure 8) described above, is determined.

[0046] Furthermore, the optical pulse wave measurement circuit 14 described above lights up the green LED 53 and measures the output current value of the light sensor 6 (step S105). The measured output current value has a periodic waveform. The measurement result of the output current value in step S105 is stored in the memory 15 (step S106). The processes in steps S105 and S106 are repeated. The control circuit 10 performs waveform analysis on the measurement results stored in the memory 15 (step S107) to determine the time of the feature points (step S108). Here, the time (let's call it time t2) of the lower limit of the optical volume pulse wave of the pulse wave waveform 402 (see Figure 8) described above is determined.

[0047] Next, the control circuit 10 calculates the time PIT, which is the difference between the two times (step S109). That is, time PIT = time t2 - time t1.

[0048] The distance L mentioned above is either entered in advance or set in advance (step S110) and stored in memory 15 (step S111). The pulse wave velocity PWV is calculated by dividing the distance L by the time PIT (step S112). That is, pulse wave velocity PWV = distance L / time PIT.

[0049] Next, the blood pressure P is calculated. The proportionality constant α for calculating the blood pressure P is pre-entered (step S113) and stored in memory 15 (step S114). The proportionality constant α is calculated in advance by measuring blood pressure with another measuring device.

[0050] Since blood pressure P is proportional to pulse wave velocity PWV, blood pressure P is calculated by multiplying pulse wave velocity PWV by the proportionality constant α (step S115). That is, blood pressure P = proportionality constant α * pulse wave velocity PWV.

[0051] The pulse wave velocity (PWV) and blood pressure (P) obtained through the above process are transmitted to other devices by the communication circuit 16 and the short-range wireless communication driver 7 (step S116). For example, they are transmitted to a smartphone. In this example, the transmission from the detection device 100 to other devices is performed by short-range wireless communication.

[0052] Alternatively, instead of lighting up the green LED 53, which is a green light source, in step S105, the output current value of the light sensor 6 may be measured by lighting up the red LED 51, which is a red light source, or the near-infrared LED 52, which is a near-infrared light source.

[0053] (Measurement of respiratory rate) Figure 14 is a flowchart showing the process of measuring respiratory rate by the detection device 100. In Figure 14, the optical pulse wave measurement circuit 14 described above lights up the green LED 53 and measures the output current value of the light sensor 6 (step S201). The measured output current value has a periodic waveform. The measurement result of the output current value in step S201 is stored in the memory 15 (step S202). The control circuit 10 performs waveform analysis on the measurement result stored in the memory 15 (step S203), calculates the pulse frequency fp from the period of the feature points (step S204), and further calculates the pulse frequency fluctuation value Δfp, which is the fluctuation value of the pulse frequency fp (step S205). The pulse frequency fluctuation value Δfp, which is the fluctuation value of the pulse frequency fp, can be estimated to be the respiratory rate.

[0054] In addition, the following processes are performed in parallel with the processing from steps S201 to S205. The temperature measurement circuit 12 described above measures the current value, which is temperature data, from the temperature sensor 3 (step S206). The measurement result of the current value in step S206 is stored in the memory 15 (step S207). The control circuit 10 performs waveform analysis on the measurement result stored in the memory 15 (step S208) and calculates the temperature change frequency ft (step S209).

[0055] Next, it is determined whether the pulse frequency fluctuation value Δfp calculated in step S205 matches the temperature change frequency ft calculated in step S209 (step S210). In step S210, if the pulse frequency fluctuation value Δfp and the temperature change frequency ft match (Yes in step S210), the pulse frequency fluctuation value Δfp is determined to be the respiratory rate. In this case, the pulse frequency fp is transmitted to another device by the communication circuit 16 and the short-range wireless communication driver 7 (step S211). For example, it is transmitted to a smartphone. In this example, the transmission from the detection device 100 to the other device is performed by short-range wireless communication. Note that the pulse frequency fluctuation value Δfp and the temperature change frequency ft match when the difference between the two is within a predetermined range, i.e., within a specified range.

[0056] In step S210, if the pulse frequency fp and the temperature change frequency ft do not match (No in step S210), that is, if they are not within the predetermined range, the pulse frequency fp is not transmitted from the detection device 100 to other devices. In other words, if the difference between the two is not within the predetermined range, the pulse frequency fluctuation value Δfp is determined not to be the respiratory rate, and the pulse frequency fp is not transmitted to other devices. In this case, the process returns to steps S201 and S206 and continues.

[0057] Alternatively, instead of lighting up the green LED 53, which is a green light source, in step S201, the output current value of the light sensor 6 may be measured by lighting up the red LED 51, which is a red light source, or the near-infrared LED 52, which is a near-infrared light source.

[0058] (Processing to remove motion noise) Figure 15 is a flowchart illustrating a method for removing motion noise. In Figure 15, the optical pulse wave measurement circuit 14 described above lights up the green LED 53 and measures the output current of the light sensor 6 (step S301). The measurement result of the output current in step S301 is stored in the memory 15 (step S302). The control circuit 10 performs waveform analysis on the measurement result stored in the memory 15 (step S303) and calculates the pulse frequency fp (step S304).

[0059] In addition, the following processes are performed in parallel with the processing in steps S301 to S304. The acceleration measurement circuit 13 stores the acceleration waveform detected by the acceleration sensor 4 in the memory 15 (steps S305, S306). The control circuit 10 performs waveform analysis on the acceleration waveform stored in the memory 15 (step S307) and calculates the frequency fa of the acceleration change (step S308).

[0060] Next, it is determined whether the pulse frequency fp calculated in step S304 matches the frequency fa of the acceleration change calculated in step S308 (step S309). If the pulse frequency fp and frequency fa do not match in step S309 (No in step S309), the pulse frequency fp is transmitted to another device by the communication circuit 16 and the short-range wireless communication driver 7 (step S310). In other words, if the pulse frequency fp and frequency fa do not match, the calculated value is considered not to be motion noise. Therefore, the calculated value is transmitted to another device as the pulse frequency fp. The pulse frequency fp is transmitted to, for example, a smartphone. In this example, the transmission from the detection device 100 to the other device is performed by short-range wireless communication. Note that the case where the pulse frequency fp and frequency fa do not match is when the difference between the two is not within a predetermined range, that is, not within a specified range.

[0061] In step S309, if the pulse frequency fp and frequency fa match (Yes in step S309), the calculated value is considered to be motion noise, and therefore the pulse frequency fp is not transmitted to other devices. In other words, if the difference between the two is within a predetermined range, the pulse frequency fp is not transmitted to other devices. As a result, motion noise is eliminated. In this case, the process returns to steps S301 and S305 to perform the measurement again, and the process continues.

[0062] Alternatively, instead of lighting up the green LED 53, which is a green light source, in step S301, the output current value of the light sensor 6 may be measured by lighting up the red LED 51, which is a red light source, or the near-infrared LED 52, which is a near-infrared light source.

[0063] (Method for measuring blood oxygen levels) Blood oxygen saturation (hereinafter referred to as SpO2), which is biological information, can be obtained by measuring light transmitted through living tissue such as a finger. For example, SpO2 can be measured by the following formula (1). SpO2 = ba·R…(1)

[0064] As shown in the above formula (1), SpO2 is a linear function of the value R. In the above formula (1), "a" and "b" are predetermined coefficients. In formula (1), the value R is defined by the following formula (2). R = (ACr / DCr) / (ACir / DCir)…(2)

[0065] In the above formula (2), ACr is the AC component of the measured value of red light (Red), DCr is the DC component of the measured value of red light, ACir is the AC component of the measured value of near-infrared light (IR), and DCir is the DC component of the measured value of near-infrared light. The AC component is the component of the pulse wave that appears in the direct current. SpO2, which is a linear function of the value R, is calibrated by the oxygen concentration sampled in advance.

[0066] More specifically, the value of SpO2 can be obtained as follows. That is, the value of SpO2 corresponding to the above value R is measured in advance, and the value of SpO2 is obtained based on the curve of the measured value. FIG. 16 is a diagram showing an example of the value of SpO2. The curve of the measured value is, for example, in FIG. 16, which is the calculated value of the above value R, and the vertical axis is the value of SpO2. When Ir light is greater than Red light (Ir>Red), the value R is less than 1.0, and when Red light is greater than Ir light (Ir<Red), the value R is greater than 1.0.

[0067] As shown in FIG. 16, by calculating the above value R, the value of SpO2 corresponding to that value R can be obtained. For example, by using the curve C1 in FIG. 16, when the value R is 0.9, the value of SpO2 can be obtained as approximately 83%. Also, for example, by using the curve C2 in FIG. 16, when the value R is 0.9, the value of SpO2 can be obtained as approximately 87%.

[0068] Also, by determining the above coefficients a and b so as to be an approximation formula of curve C1 or curve C2, the value of SpO2 can also be obtained using formula (1).

[0069] Figure 17 is a flowchart illustrating a method for measuring blood oxygen concentration using the detection device 100. In Figure 17, the optical pulse wave measurement circuit 14 lights up the near-infrared LED 52 using the LED driver 5 (step S401). The optical pulse wave measurement circuit 14 measures the output current of the light sensor 6 (step S402). The measurement result of the current value in step S402 is stored in the memory 15 (step S403). The optical pulse wave measurement circuit 14 turns off the near-infrared LED 52 using the LED driver 5 (step S404).

[0070] Furthermore, the optical pulse wave measurement circuit 14 lights up the red LED 51 using the LED driver 5 (step S405). The optical pulse wave measurement circuit 14 measures the output current of the light sensor 6 (step S406). The measurement result of the current value in step S406 is stored in the memory 15 (step S407). The optical pulse wave measurement circuit 14 turns off the red LED 51 using the LED driver 5 (step S408). The optical pulse wave measurement circuit 14 returns to step S401 and repeats the above process. In other words, the optical pulse wave measurement circuit 14 alternately lights up the red LED 51 and the near-infrared LED 52, repeatedly measures the light sensor current using the light sensor 6, and stores it in the memory 15.

[0071] The control circuit 10 performs waveform analysis on the measurement results of the output current of the light sensor 6 due to the illumination of the near-infrared LED 52, which are stored in memory 15 (step S409). This waveform analysis calculates the average value (DCir) and amplitude (ACir) of the near-infrared signal waveform (steps S410, S411).

[0072] Furthermore, the control circuit 10 performs waveform analysis on the measurement results of the output current of the light sensor 6 due to the illumination of the red LED 51, which are stored in memory 15 (step S412). This waveform analysis calculates the average value (DCr) and amplitude (ACr) of the red signal waveform (steps S413, S414).

[0073] Next, the control circuit 10 calculates a value R for calculating blood oxygen saturation SpO2 (step S415). The coefficient a for calculating blood oxygen saturation SpO2 is pre-input (step S416) and stored in memory 15 (step S417). The coefficient b for calculating blood oxygen saturation SpO2 is also pre-input (step S418) and stored in memory 15 (step S419). The control circuit 10 calculates blood oxygen saturation SpO2 based on the above equation (1) (step S420).

[0074] The SpO2 obtained by the above process is transmitted to another device by the communication circuit 16 and the short-range wireless communication driver 7 (step S421). The SpO2 is transmitted to, for example, a smartphone. In this example, the transmission from the detection device 100 to the other device is performed by short-range wireless communication.

[0075] (First variation) Figure 18 is an external view showing the detection device 100a according to the first modified example. Figure 19 is a diagram showing the internal structure of the detection device 100a shown in Figure 18. Figure 19 is a diagram showing a cross-section of the detection device 100a cut by a plane perpendicular to the center line J passing through the center of the hollow portion 200. Figure 20 is a diagram showing a cross-section cut by the line X-X' in Figure 19. Figure 21 is a diagram showing a cross-section cut by the line Y-Y' in Figure 19. The detection device 100a can be worn on a finger, similar to the detection device 100.

[0076] In Figures 18 and 19, the detection device 100a differs from the detection device 100 described with reference to Figure 1 in that it has insulating parts 61 and 62. The insulating parts 61 and 62 are provided on the outer surface of the outer electrode 2. Therefore, the portion of the outer surface of the outer electrode 2 not covered by the insulating parts 61 and 62 is exposed, while the portion covered by the insulating parts 61 and 62 is not exposed. The insulating parts 61 and 62 are provided on opposite sides of the hollow portion 200. The insulating parts 61 and 62 are formed of, for example, resin. The other internal configurations of the detection device 100a are the same as those of the detection device 100.

[0077] Referring to Figure 19, the cross-sections of the insulating parts 61 and 62 are elongated crescent shapes. When the detection device 100a is attached to a finger, it is attached so that the insulating parts 61 and 62 contact the fingers on either side of that finger. For example, when the detection device 100a is attached to the middle finger of the right hand, the insulating part 61 contacts the index finger of the same right hand, and the insulating part 62 contacts the ring finger of the same right hand. In other words, the insulating part 61 or 62 is provided in the part that the other fingers (index finger and ring finger) adjacent to the middle finger of the right hand make contact with. That is, the insulating part 61 is provided on the outer surface of the outer electrode 2 in the part that the other fingers adjacent to the finger on which the detection device 100a is attached make contact with. The insulating part 61 is not provided on the outer surface of the outer electrode 2 in the part that the other fingers adjacent to the finger on which the detection device 100a is attached do not make contact with.

[0078] By using a detection device 100a with this structure, even if other fingers of the same hand wearing the detection device 100a come into contact with the detection device 100a, they will not come into contact with the outer electrode 2 of the detection device 100a because they are insulated by the insulating parts 61 and 62. Since other fingers of the same hand do not come into contact with the outer electrode 2 of the detection device 100a, there is no need to spread the fingers to prevent contact between them during measurement. Therefore, in the usage method described with reference to Figure 11, when the surface of the outer electrode 2 of the detection device of finger 301 is pressed against the surface of finger 302, other fingers of the same hand as finger 301 do not come into contact with the outer electrode 2. As a result, lead signals are obtained from finger 301 and finger 302 of the opposite hand, resulting in a measurement state that approximates the first lead electrocardiogram measurement method. This allows for the acquisition of a good electrocardiogram.

[0079] (Second variation) Figure 22 is an external view showing the detection device 100b according to the second modified example. Figure 23 is a diagram showing the internal structure of the detection device 100b in Figure 22. Figure 23 is a diagram showing a cross-section of the detection device 100b cut by a plane perpendicular to the center line J passing through the center of the hollow portion 200. Figure 24 is a diagram showing a cross-section cut by the line X-X' in Figure 23. Figure 25 is a diagram showing a cross-section cut by the line Y-Y' in Figure 23. The detection device 100b can be worn on a finger, similar to the detection device 100 and detection device 100a described above.

[0080] As shown in Figures 22 to 25, the detection device 100b has divided outer electrodes 2a and 2b. As shown in Figure 23, the outer electrodes 2a and 2b are divided vertically in the figure. As shown in Figure 23, the insulating parts 61 and 62 are divided horizontally in the figure. Therefore, the outer electrodes 2a and 2b are exposed on the outer surface of the detection device 100b in the parts not covered by the insulating parts 61 and 62. The other internal configurations of the detection device 100b are the same as those of the detection device 100a and detection device 100.

[0081] Focusing on the outer electrode 2a, the outer electrode 2a is provided between the insulating portion 61 and the insulating portion 62 in a direction circumferential to the center line J as the central axis. The outer electrode 2a is positioned between the insulating portion 61 and the insulating portion 62. Focusing on the outer electrode 2b, the outer electrode 2b is provided between the insulating portion 61 and the insulating portion 62 in a direction circumferential to the center line J as the central axis. The outer electrode 2b is positioned between the insulating portion 61 and the insulating portion 62.

[0082] Focusing on the insulating portion 61, it is provided between the outer electrode 2a and the outer electrode 2b in a direction circumferential to the center line J as its central axis. The insulating portion 61 is located between the outer electrode 2a and the outer electrode 2b. Focusing on the insulating portion 62, it is provided between the outer electrode 2a and the outer electrode 2b in a direction circumferential to the center line J as its central axis. The insulating portion 62 is located between the outer electrode 2a and the outer electrode 2b.

[0083] For example, when the detection device 100a is attached to the middle finger of the right hand, an insulating portion 61 or 62 is provided in the area where the other fingers adjacent to the middle finger (index finger and ring finger) come into contact. That is, an insulating portion 61 or 62 is provided on the outer surface of the outer electrode 2 in the area where the other fingers adjacent to the finger on which the detection device 100a is attached come into contact. The insulating portions 61 and 62 are not provided on the outer surface of the outer electrode 2 in the area where the other fingers adjacent to the finger on which the detection device 100a is attached do not come into contact.

[0084] The outer electrodes 2a and 2b are each connected to the potential difference measurement circuit 11. The potential difference measurement circuit 11 measures the potential difference between either one of the outer electrodes 2a or 2b and the inner electrode 1.

[0085] Referring to Figure 23, the cross-sections of the insulating parts 61 and 62 are elongated crescent shapes. When attaching the detection device 100b to a finger, attach it so that the insulating parts 61 and 62 are in contact with the fingers on either side of that finger.

[0086] When the detection device 100b is attached in this manner, as in the first modified example, even if other fingers of the same hand as the hand to which the detection device 100b is attached come into contact with the detection device 100b, they will not come into contact with the outer electrode 2a or 2b of the detection device 100b because they are insulated by the insulating parts 61 and 62. Since other fingers of the same hand do not come into contact with the outer electrode 2 of the detection device 100b, there is no need to spread the fingers to prevent contact between them during measurement. Therefore, in the method of use described with reference to Figure 11, when the surface of the outer electrode 2a or 2b of the detection device 100b of finger 301 is pressed against the surface of finger 302, other fingers of the same hand as finger 301 will not come into contact with the outer electrode 2a or 2b. As a result, lead signals are obtained from finger 301 and finger 302 on the opposite hand of the same person, resulting in a measurement state that approximates the method of measuring a lead I electrocardiogram. This allows for the acquisition of a good electrocardiogram.

[0087] For example, when the detection device 100b is attached to the middle finger of the right hand, the device is attached such that the insulating part 61 contacts the index finger of the same right hand, and the insulating part 62 contacts the ring finger of the same right hand. This ensures that the insulating part 61 or 62 is provided in the area where the other fingers (index finger and ring finger) adjacent to the middle finger of the right hand make contact. In other words, the insulating part 61 or 62 is provided in the area of ​​the outer electrodes 2a and 2b on the outer surface that is in contact with the other fingers adjacent to the finger on which the detection device 100b is attached. [Explanation of Symbols]

[0088] 1 Inner electrode 2, 2a, 2b outer electrode 3. Temperature sensor 4. Accelerometer 6. Light sensor 8 batteries 9, 91, 92, 801 coils 10 Control circuits 11. Potential difference measurement circuit 12 Temperature measurement circuit 13. Acceleration Measurement Circuit 14. Optical pulse wave measurement circuit 15 memory 16 Communication Circuit 17 Power circuit 18 CPU 20 Flexible circuit boards 51 Red LEDs 52 Near-infrared LED 53 Green LED 60, 510, 520, 530 openings 61, 62 Insulation part 100, 100a, 100b detection devices 200, 210 Hollow part 800 Charging Adapter

Claims

1. A first electrode having an inner surface for contact with the finger on which it is attached, A second electrode is provided outside the first electrode and is electrically insulated from the first electrode, A light source is provided outside the first electrode and inside the second electrode, which irradiates light onto the finger, A light sensor is provided on the outside of the first electrode and on the inside of the second electrode, and receives light from the finger as input. The system includes a control circuit provided outside the first electrode and inside the second electrode, which measures biological information based on the output of the light sensor, The light source includes at least one of a red light source, an infrared light source, a near-infrared light source, and a green light source, and is wearable on one finger. The second electrode further includes first and second insulating portions provided on the outer surface of the second electrode, The first and second insulating portions are provided on the outer surface of the second electrode, in the portion that comes into contact with other fingers adjacent to the aforementioned finger. The second electrode is provided so as to cover the outside of the first electrode in one full circle. The first insulating portion covers a part of the outer circumference of the second electrode. The second insulating portion covers the other part of the outer circumference of the second electrode. The first insulating portion and the second insulating portion are provided at positions facing each other with the second electrode in between. Detection device.

2. A first electrode having an inner surface for contact with the finger on which it is attached, A second electrode is provided outside the first electrode and is electrically insulated from the first electrode, A light source is provided outside the first electrode and inside the second electrode, which irradiates light onto the finger, A light sensor is provided on the outside of the first electrode and on the inside of the second electrode, and receives light from the finger as input. The system includes a control circuit provided outside the first electrode and inside the second electrode, which measures biological information based on the output of the light sensor, The light source includes at least one of a red light source, an infrared light source, a near-infrared light source, and a green light source, and is wearable on one finger. The second electrode further includes first and second insulating portions provided on the outer surface of the second electrode, The second electrode is provided so as to cover the outside of the first electrode in one full circle. The first insulating portion covers a part of the outer circumference of the second electrode. The second insulating portion covers the other part of the outer circumference of the second electrode. The first insulating portion and the second insulating portion are provided at positions facing each other with the second electrode in between. The outer surface of the second electrode is not provided with the first and second insulating portions in the portion that is not in contact with the finger adjacent to the first electrode. Detection device.

3. A first electrode having an inner surface for contact with the finger on which it is attached, A second electrode is provided outside the first electrode and is electrically insulated from the first electrode, A light source is provided outside the first electrode and inside the second electrode, which irradiates light onto the finger, A light sensor is provided on the outside of the first electrode and on the inside of the second electrode, and receives light from the finger as input. The system includes a control circuit provided outside the first electrode and inside the second electrode, which measures biological information based on the output of the light sensor, The light source includes at least one of a red light source, an infrared light source, a near-infrared light source, and a green light source, and is wearable on one finger. The second electrode further includes first and second insulating portions provided on the outer surface of the second electrode, The second electrode is provided so as to cover the outside of the first electrode in one full circle. The first insulating portion covers a part of the outer circumference of the second electrode. The second insulating portion covers the other part of the outer circumference of the second electrode. The first insulating portion and the second insulating portion are provided at positions facing each other with the second electrode in between. The second electrode is provided in a portion of the aforementioned finger that is not in contact with other fingers adjacent to it. The second electrode is not provided in the area where the adjacent finger makes contact with the aforementioned finger. Detection device.

4. A first electrode having an inner surface for contact with the finger on which it is attached, A second electrode is provided outside the first electrode and is electrically insulated from the first electrode, A light source is provided outside the first electrode and inside the second electrode, which irradiates light onto the finger, A light sensor is provided on the outside of the first electrode and on the inside of the second electrode, and receives light from the finger as input. The device includes a control circuit provided on the outside of the first electrode and on the inside of the second electrode, which measures biological information based on the output of the optical sensor; a storage unit that stores the distance between the attachment position of the second electrode and the position of the chest of the living body; a potential difference measurement circuit that measures the potential difference between the first electrode and the second electrode; and a control unit that calculates pulse wave velocity based on the potential difference measured by the potential difference measurement circuit and the distance stored in the storage unit. The control unit, The pulse wave velocity is calculated by dividing the distance between the attachment position of the second electrode and the position of the body's chest by the time difference between the time corresponding to the characteristic point of the electrocardiogram, which is the waveform of the potential difference measured by the potential difference measurement circuit, and the time corresponding to the characteristic point of the pulse wave, which is biological information measured based on the output of the optical sensor. The light source includes at least one of a red light source, an infrared light source, a near-infrared light source, and a green light source, and the detection device is wearable on one finger.

5. A first electrode having an inner surface for contact with the finger on which it is attached, A second electrode is provided outside the first electrode and is electrically insulated from the first electrode, A light source is provided outside the first electrode and inside the second electrode, which irradiates light onto the finger, A light sensor is provided on the outside of the first electrode and on the inside of the second electrode, and receives light from the finger as input. The system includes a control circuit provided outside the first electrode and inside the second electrode, which measures biological information based on the output of the light sensor, The light source includes at least one of a red light source, an infrared light source, a near-infrared light source, and a green light source, and is wearable on one finger. The system further includes a temperature sensor for detecting the temperature of the first electrode, The aforementioned control circuit is The pulse frequency is calculated based on the output waveform of the aforementioned optical sensor. When the difference between the temperature change frequency detected by the temperature sensor and the fluctuation value of the pulse frequency is within a predetermined range, the pulse frequency data is transmitted to another device. When the difference is not within a predetermined range, the pulse frequency data is not transmitted to the other device. Detection device.

6. A first electrode having an inner surface for contact with the finger on which it is attached, A second electrode is provided outside the first electrode and is electrically insulated from the first electrode, A light source is provided outside the first electrode and inside the second electrode, which irradiates light onto the finger, A light sensor is provided on the outside of the first electrode and on the inside of the second electrode, and receives light from the finger as input. The system includes a control circuit provided outside the first electrode and inside the second electrode, which measures biological information based on the output of the light sensor, The light source includes at least one of a red light source, an infrared light source, a near-infrared light source, and a green light source, and is wearable on one finger. The device further includes an acceleration sensor that detects the acceleration applied to the device, The aforementioned control circuit is The pulse frequency is calculated based on the output waveform of the aforementioned optical sensor. The frequency of the change in acceleration detected by the acceleration sensor and When the difference between the pulse frequency fluctuation value and the value is within a predetermined range, the pulse frequency data is not transmitted to another device. When the difference is not within a predetermined range, the pulse frequency data is transmitted to the other device. Detection device.

7. A first electrode having an inner surface for contact with the finger on which it is attached, A second electrode is provided outside the first electrode and is electrically insulated from the first electrode, A light source is provided outside the first electrode and inside the second electrode, which irradiates light onto the finger, A light sensor is provided on the outside of the first electrode and on the inside of the second electrode, and receives light from the finger as input. The system includes a control circuit provided outside the first electrode and inside the second electrode, which measures biological information based on the output of the light sensor, The light source includes at least one of a red light source, an infrared light source, a near-infrared light source, and a green light source, and is wearable on one finger. The device further includes a battery that supplies power to various parts within the device, and a coil for charging the battery based on the applied magnetic field. The coil has a winding that is wound along the outer circumference of the first electrode, outside the first electrode and inside the second electrode. The coil includes a first coil and a second coil, and the first coil and the second coil are arranged on opposite sides of each other with respect to the direction in which the finger is inserted into the device. Detection device.

8. The first electrode is It has a first opening provided at a position corresponding to the light source and a second opening provided at a position corresponding to the light sensor, Light from the light source is shone onto the finger through the first opening. Light from the finger is input to the light sensor through the second opening. The detection device according to any one of claims 1 to 7.

9. The detection device according to claim 4, which calculates blood pressure information based on the pulse wave velocity.

10. The detection device according to claim 4, further comprising a communication circuit for transmitting the calculated pulse wave velocity data to another device.

11. The detection device according to claim 9, further comprising a communication circuit for transmitting the calculated blood pressure information data to another device.

12. The present invention further includes a heat insulating member having heat insulating properties, provided on the outside of the first electrode and on the inside of the second electrode. The detection device according to claim 5, wherein the heat insulating member covers the first electrode and the temperature sensor.

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