JP4476664B2 - Biological information measuring device - Google Patents

Description

  The present invention relates to a biological information measuring device capable of measuring biological information such as a pulse while being worn on a wrist (arm).

  Due to the recent increase in interest in health management, various biological information measuring devices capable of measuring various biological information such as a pulse while being worn on a wrist (arm) or the like have been provided (for example, see Patent Document 1). ).

  The pulse meter (biological information measuring device) described in Patent Document 1 includes two electrodes on the skin contact side. When both the electrodes touch the skin, a minute current flows through the skin and the voltage between the two electrodes decreases, so that the pulse sensor is determined to be in contact with the skin. Therefore, the presence or absence of contact with the skin can be detected from the potential difference between the two electrodes.

A pulse measuring device (biological information measuring device) having a pulse measuring system using a light emitting diode (light emitting unit) and a light receiving element (light receiving unit) has also been proposed (for example, see Patent Document 2). The pulse measuring device described in Patent Document 2 includes a light-receiving element for measuring light and darkness, and detects the presence or absence of contact according to the output of the light-receiving element.
Japanese Patent Laying-Open No. 2003-70757 (paragraph numbers 0021-0029, FIG. 2, etc.) JP-A-60-246736

  However, the biological information measuring apparatus described in Patent Document 1 described above can accurately detect contact with a living body when the electrode is large to some extent, but there are many false detections when the electrode is small. There is a problem that it is difficult to use in a small terminal such as a mold. Moreover, since the biological information measuring device described in Patent Document 2 simply determines the brightness from the output from the light receiving element and determines the presence or absence of contact, there is a risk of erroneous detection depending on the degree of external light. .

  The present invention has been made in view of the above-described circumstances, and aims to provide a biological information measuring device that is downsized with a simple configuration and that is not erroneously detected even when external light enters. To do.

  The present invention provides the following means in order to solve the above problems.

  The biological information measuring apparatus of the present invention includes a main body, a biological sensor unit that is provided in the main body and that emits light toward the living body to generate a biological information signal according to the amount of backscattered light from the living body, A biological information calculation unit that is provided in the main body and calculates biological information based on the biological information signal, and is arranged on the lower surface side of the main body, and detects whether the biological sensor unit is in contact with the surface of the biological body. A light emitting unit that emits light to the living body, and a light emitting unit that is disposed on a lower surface of the main body to transmit and reflect the light emitted by the light emitting unit. A cover glass that transmits backscattered light, a light receiving unit that receives light transmitted through the cover glass, and the living body and the living body sensor unit are in contact with each other based on a light reception signal received by the light receiving unit. The Characterized in that it comprises a determination unit that determines Luke.

  In the biological information measuring apparatus according to the present invention, light is emitted from the light emitting unit toward the living body. The irradiated light is received by the light receiving unit by reflection on the cover glass surface, propagation in the cover glass, backscattering in the living body, and the like. The determination unit provided in the detection unit is configured such that the living body surface and the living body sensor unit come into contact with each other based on the light reception signal received by the light receiving unit in a state where the light emitting unit emits light and a state where the light emitting unit does not emit light. Determine whether or not. The determination unit determines that the living body surface and the biosensor unit are in contact, that is, determines that the main body is attached to the wrist (arm, etc.), and the biosensor unit irradiates light toward the living body. A biological information signal corresponding to the amount of backscattered light from is generated. Further, the biological information detection unit performs a predetermined calculation on the biological information signal to calculate biological information such as a pulse. Moreover, even if external light enters the light receiving unit, the contact between the biological surface and the biological sensor unit is not erroneously detected.

  In the biological information measuring apparatus of the present invention, the light receiving unit may receive back scattered light from the living body that has passed through the cover glass and generate a biological information signal corresponding to the amount of the back scattered light. preferable.

  In the biological information measuring device according to the present invention, the light receiving unit performs both the contact between the biological surface and the biological sensor unit and the generation of the biological information signal based on the received light, and thus the number of components is small. In addition, the entire biological information measuring device can be reduced in size.

  In the biological information measuring device of the present invention, the cover glass includes a reflecting surface that is disposed between the light emitting unit and the light receiving unit and reflects a part of the light propagating through the cover glass. Is preferred.

  In the biological information measuring apparatus according to the present invention, the light propagated through the inside of the cover glass among the light irradiated by the light irradiation unit is reflected to the biological surface side by the reflecting surface. For this reason, when measuring biological information, light propagating through the cover glass that does not contain biological information can be blocked, so that it is possible to measure biological information with high accuracy.

  Moreover, it is preferable that the biological information measuring device of the present invention includes a bundle-shaped optical fiber having one end disposed close to the cover glass and the other end close to the light receiving surface of the light receiving unit.

  In the biological information measuring apparatus according to the present invention, since the optical fiber is arranged, the light that has passed through the surface portion such as the skin of the living body is reflected by the outer peripheral surface of the optical fiber. The light that has passed through only the surface of the living body, such as the skin, does not contain much biological information. By blocking this light, the light that enters the optical fiber and propagates through the optical fiber is guided to the light receiving unit. Most of the light is light that has passed through the deep part of the living body below the dermis, that is, light that contains a lot of biological information.

  Moreover, it is preferable that the biological information measuring device of this invention is provided with the condensing part which condenses the backscattered light from the said biological body in the opposing surface of the said light-receiving part of the said cover glass.

  In the biological information measuring device according to the present invention, the light irradiated by the light receiving unit and back-scattered in the living body is efficiently collected on the light receiving surface of the light receiving unit by the light collecting unit. Therefore, when generating a biological information signal such as a pulse signal, the area of the light receiving unit can be reduced, and thus the entire biological information measuring device can be downsized.

  According to the biological information measuring device of the present invention, since the presence or absence of contact is detected based on the light received by the light receiving unit when the light emitting state of the light emitting unit is changed, Can be detected. Therefore, even when external light enters the light receiving unit, it is possible to accurately recognize contact with a living body, and thus it is possible to calculate biological information with high accuracy.

  Hereinafter, an embodiment of a biological information measuring apparatus according to the present invention will be described with reference to FIGS.

  As shown in FIGS. 1 to 8, the biological information measuring apparatus 1 of the present embodiment is a wristwatch type, and calculates a pulse rate that is biological information in a state where the biological information measuring apparatus 1 is worn on a wrist (arm) A.

  This biological information measuring device 1 is a housing (main body) 2 in which various electric parts and electronic parts are housed, and a fixing that attaches the housing 2 to the wrist A with the lower surface 2a of the housing 2 facing the biological surface B side. Means 3, an LED (Light Emitting Diode) 4 that is provided in the housing 2 and irradiates light toward the living body surface (living body) B, and a PD (Photo-Diode) 5 that receives backscattered light from the living body. A biosensor unit 6 and a data processing unit that is provided in the housing 2 and generates a pulse signal (biological information signal) corresponding to the amount of light received by the biosensor unit 6 and calculates the generated pulse signal to calculate the pulse rate ( A biological information calculation unit) 7.

  The biological sensor unit 6 also serves as a detection unit that detects whether or not the biological sensor unit (the lower surface 2a side of the housing 2) is in contact with the biological surface B. That is, the living body sensor unit 6 includes the LED 4 and the PD 5 having functions of detecting whether or not the living body surface B is touched and detecting light from the living body for generating a pulse signal. .

  In addition, as shown in FIG. 7, the biological information measuring apparatus 1 is disposed on the lower surface 2 a side of the housing 2, transmits and reflects the light irradiated by the LED 4, and transmits the backscattered light in the living body. 23. The PD 5 receives light propagating through the cover glass 23 and backscattered light from the living body that has passed through the cover glass 23.

  In addition, the data processing unit 7 includes a determination unit 7 a that determines whether or not the living body and the biological sensor unit 6 are in contact with each other based on the light reception signal received by the PD 5.

  The housing 2 is made of a metal material such as plastic or aluminum, and has a predetermined thickness, for example, a substantially rectangular shape when viewed from above. A substantially square glass plate 10 is fitted in the central portion of the upper surface 2 b of the housing 2, and a display unit 11 for displaying the calculated pulse rate and other various information is provided inside the glass plate 10. It is arranged.

  Further, as shown in FIGS. 5 and 6, a main board 12 is provided in the housing 2, and the data processing section 7, the display section 11, the rechargeable battery 13, The memory 14 for recording the pulse rate, the sub-board 15 and other various electronic components are electrically connected by mounting or wiring.

  The data processing unit 7 includes an IC component such as a CPU, and after amplifying the pulse signal generated by the PD 5 with an amplifier or the like, it performs predetermined processing such as fast Fourier transform processing (FFT processing). It has a function of calculating the pulse rate by analyzing the processing result. Further, the data processing unit 7 records the calculated pulse rate in the memory 14 and causes the display unit 11 to display the pulse rate based on input from each button 20 described later. Further, the data processing unit 7 has a function of comprehensively controlling other components.

  The display unit 11 is a liquid crystal display such as an LCD (Liquid Crystal Display), for example. In addition to the above-described pulse rate, for example, a time display function for displaying a time counted by a crystal resonator (not shown) or other It has a function to display various information. For example, the time, date, day of the week, remaining power amount of the rechargeable battery 13 and the like can be displayed.

  As shown in FIGS. 1 and 2, the housing 2 includes a plurality of buttons 20, for example, three buttons 20 disposed on the lower surface of the display unit 11 on the upper surface 2 b of the housing 2 and the housing 2. One button 20 arranged on the side surface is provided. Various operations can be performed by pressing these buttons 20. For example, operations such as pulse measurement start, measurement stop, display switching between pulse rate and time, and pulse rate data recorded in the memory 14 can be transmitted to an external device. .

  Furthermore, an external connection terminal (charging means) 21 is provided on the side surface of the housing 2 to supply power to the rechargeable battery 13 from outside such as a charger. A cover or the like may be attached to cover the external connection terminal 21 to protect the external connection terminal 21. By doing so, it is possible to protect the external connection terminal 21 from water drops, dust, and the like, which is more preferable. Further, not only the external connection terminal 21, but also a charger and a transformer for supplying power to the housing 2 may be provided, and the rechargeable battery 13 may be charged in a non-contact state.

  The pulse signal generated by the PD 5 is sent to the data processing unit 7 via the flexible board 24, the sub board 15, and the main board 12. In addition, the light propagating through the cover glass 23 and received by the PD 5 is sent to the determination unit 7a.

  The determination unit 7a receives the light reception signal detected by the PD 5 as a voltage, and always compares this voltage value with a preset threshold voltage αV. If the detected light reception signal is equal to or lower than the threshold voltage αV when the LED 4 is in the OFF state, it is determined that the LED 4 and the PD 5 are not in contact with the biological surface B. On the other hand, if the light reception signal detected by the PD 5 is equal to or higher than the threshold voltage αV, the LED 4 is turned on. And if the light reception signal detected by PD5 is more than threshold voltage (beta) V, it will judge that LED4 and PD5 are a non-contact state to the biological body surface B. FIG. On the other hand, if the received light signal detected by the PD 5 is equal to or lower than the threshold voltage βV, it is determined that the LED 4 and the PD 5 are in contact with the biological surface B. That is, the data processing unit 7 is set to control the operation of the LED 4 so that light is emitted from the LED 4 based on the detection result. In addition to this case, for example, when it is detected that the living body surface B is not touched, the FFT processing may be set not to be performed.

  The fixing means 3 has a first band 30 and a second band 31 that are attached to the wrist A with the base end side attached to the housing 2. The first band 30 and the second band 31 are provided in the longitudinal direction of the housing 2 so as to face each other with the housing 2 interposed therebetween. Moreover, both the bands 30 and 31 are formed with the elastic material which can be expanded-contracted.

  A buckle 30a and a tongue 30b are attached to the tip of the first band 30. The second band 31 has a plurality of insertion holes 31 a into which the tongue 30 b is inserted along the longitudinal direction of the second band 31. Thereby, the lengths of the first band 30 and the second band 31 can be adjusted according to the thickness of the wrist A of the user.

  A case will be described in which the pulse rate is calculated with the biological information measuring apparatus 1 configured as described above attached to the wrist A.

  First, as shown in the flowchart of FIG. 8, the button 20 is pressed to switch to the pulse measurement mode, whereby the PD5 is turned on (step S1). Here, first, the voltage of the received light signal received by the PD 5 is detected with the LED 4 kept in the OFF state (step S2). The light received by the PD 5 is output as a voltage to the determination unit 7a of the data processing unit 7. In this case, the determination unit 7a constantly compares the detected voltage value with the threshold voltage αV (step S3), and when the detected voltage value is equal to or higher than the threshold voltage α (step S3 “NO”). The LED 4 is turned on (step S4). Again, the determination unit 7a of the data processing unit 7 constantly compares the detected voltage value with the threshold voltages βV and γV (step S5), and the detected voltage value is the threshold voltage “β or more and γ or less”. When it becomes (step S5 “YES”), it is determined that the LED 4 and the PD 5 are in contact with the living body surface B.

  On the other hand, when the LED 4 is in the OFF state and the voltage value detected by the PD 5 is equal to or lower than the threshold voltage α (step S3 “YES”), it is determined that the LED 4 and the PD 5 are not in contact with the living body surface B. If the voltage value detected by the PD 5 is not the threshold voltage “β to γ” (step S5 “NO”) when the LED 4 is in the ON state, it is determined that the LED 4 and the PD 5 are not in contact with the living body surface B. That is, the data processing unit 7 detects whether the LED 4 and the PD 5 are reliably in contact with the biological surface B.

  In this embodiment, the data processing unit always compares the detected voltage value with the threshold voltage. For example, the data processing unit compares only before measuring the pulse, or compares before and after measuring the pulse. It doesn't matter.

  As shown in FIGS. 2 and 3, the determination unit 7a winds both the bands 30 and 31 so as to wind the wrist A of the user, and the tongue 30b of the first band 30 according to the size of the wrist A. If the data processing unit 7 is inserted into the insertion hole 31a of the second band 31 and determines that the housing 2 is attached to the wrist A, the data processing unit 7 irradiates light from the LED 4 toward the living body. The irradiated light is absorbed and scattered by tissues and blood such as fat and muscle in the living body, and a part of the irradiated light is detected by the PD 5 as backscattered light. The detected light varies as the blood volume changes due to pulsation. The PD 5 receives the backscattered light, generates a pulse signal (biological information signal) corresponding to the change in the amount of received light, and outputs the pulse signal to the data processing unit 7. That is, since the amount of backscattered light of the light emitted from the LED 4 varies according to the blood flow variation in the artery and arteriole in the wrist A (living body), the PD 5 is a pulse of the artery, that is, a pulse wave. The backscattered light can be received according to. Thereby, PD5 can generate a pulse signal.

  The data processing unit 7 amplifies the transmitted pulse signal, performs predetermined processing such as FFT processing, and then performs analysis to calculate the pulse rate. Then, the data processing unit 7 records the calculated pulse rate in the memory 14 and displays it on the display unit 11 based on the operation of each button 20.

  Since the user can confirm the pulse rate easily calculated by displaying the calculated pulse rate on the display unit 11 by pressing each button 20 when necessary, it is easy to use. In addition, the user can easily check other information other than the pulse rate, for example, the time and the remaining power of the rechargeable battery 13 by the operation of each button 20.

  In addition, as described above, the user fastens the housing 2 with a predetermined force with both the bands 30 and 31 and attaches it to the wrist A, so even if it is worn for a long time, it does not feel a sense of pressure. I do not feel uncomfortable.

  Since the LEDs 4 and PD5 are pressed toward the lower surface 2a side of the housing 2 by the elasticity of the flexible substrate 24 and are as close as possible to the living body surface B, the pulse rate can be calculated with high accuracy.

  In addition, when charging the rechargeable battery 13, for example, charging can be performed by connecting a charging cord or the like connected to a charger to the external connection terminal 21, and a normal battery is separately prepared. do not have to. Therefore, the maintenance cost can be reduced. It should be noted that a sound output means such as a buzzer for outputting sound is provided in the housing 2, and when the charge amount of the rechargeable battery 13 decreases to near “0”, the sound is output and the charging time (charging timing) is reached. You may comprise so that it may notify.

  As described above, according to the biological information measuring apparatus 1 of the present embodiment, whether the LED 4 and the PD 5 are in contact with the biological surface B based on the light received by the PD 5 when the light emission state of the LED 4 is changed. Therefore, it is possible to detect contact with the biological surface B with a simple configuration. Therefore, even when external light enters the PD 5, it is possible to accurately recognize contact with the biological surface B, and thus it is possible to detect biological information with high accuracy.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

  For example, as shown in FIG. 9, the cover glass 23 may be provided with a reflection surface 23 a that is disposed between the LED 4 and the PD 5 and reflects part of the light propagating through the cover glass 23. In the case of this configuration, the light propagating through the cover glass 23 among the light irradiated by the LED 4 is reflected to the biological surface B side by the reflecting surface 23a. For this reason, when measuring biological information, the light propagating through the cover glass 23 that becomes noise light can be blocked, so that it is possible to improve the SN ratio when generating a pulse signal.

  Alternatively, as shown in FIG. 10, the PD 5 and the cover glass 23 are spaced apart, and one end 40 a is disposed close to the cover glass 23 and the other end 40 b is disposed close to the light receiving surface 5 a of the PD 5. A bundle-like optical fiber 40 may be provided. In the case of this configuration, since the optical fiber 40 is arranged in the gap between the PD 5 and the cover glass 23, the light passing through the surface portion such as the epidermis of the biological surface B is reflected by the outer peripheral surface of the optical fiber 40. Is done. The light that has passed through only the surface portion such as the epidermis of the biological surface B does not contain much biological information. Therefore, by blocking this light, it enters the optical fiber 40 and propagates through the optical fiber 40 and is guided to the PD 5. Most of the light emitted is light that has passed through the deep part of the living body below the dermis, that is, light that contains a large amount of biological information.

  Furthermore, as shown in FIG. 11, a concave portion (light condensing portion) 41 for condensing backscattered light from the living body may be formed on the surface of the cover glass 23 facing the PD 5. In the case of this configuration, the light irradiated by the PD 5 and back-scattered in the living body is efficiently condensed on the light receiving surface 5a of the PD 5 by the concave portion 41. Therefore, when the pulse signal is generated by the PD 5, the light receiving area of the PD 5 can be reduced, so that the whole biological information measuring device can be reduced in size. Note that the light condensing part may have a convex shape because light only needs to be condensed on the light condensing surface 5a of the PD 5.

  In addition, the LED 4 and the PD 5 are used for detecting contact with the living body surface B, and are configured to receive the backscattered light from the living body for generating a pulse signal. As shown in FIG. 12, even if it is the biological information measuring device 50 provided with the detection part 53 which has another pair of LED51 and PD52, and the light-shielding board 54 which shields LED4, PD5 and LED51, PD52. good. In the case of this configuration, the LED 4 and the PD 5 detect contact with the living body surface B, and the LED 51 and the PD 52 receive the backscattered light from the living body for generating the pulse signal. Backscattered light necessary for generation is received by the PD 52.

  Further, by limiting the distance between the LED 4 and the PD 5, it is possible to prevent the light emitted from the LED 4 from being reflected on the surface of the cover glass 23 and entering the PD 5. FIG. 13 and Table 1 show examples of the positional relationship between the LED 4 and the PD 5 when acrylic having a refractive index of 1.5 is used as the cover glass material.

ＰＤ５は受光面５ａがパッケージ５ｂの上面よりも一段下がった構造をしている。ＬＥＤ４とＰＤ５とは面一に配されており、ここで、これらとカバーガラス２３との距離をＸとし、カバーガラス２３の厚さをＹとしたとき、ＬＥＤ４で発せられた光のうちカバーガラス２３の下面２３ｂでの反射光が受光面５ａに入射しないための距離Ｚ１およびカバーガラス２３内部で一度反射した光が受光面５ａに入射しないための距離Ｚ３はＸ、Ｙによって異なる。Ｘ，Ｙが長くなるとＺ１，Ｚ３も長くなり、逆にＸ，Ｙが短くなるとＺ１、Ｚ３は短くなる。このように、どの領域で反射した光を遮断するかにより、上記表１に示した設計値に設定することも可能である。

The PD 5 has a structure in which the light receiving surface 5a is one step lower than the upper surface of the package 5b. The LED 4 and the PD 5 are arranged flush with each other. Here, when the distance between the LED 4 and the cover glass 23 is X and the thickness of the cover glass 23 is Y, the cover glass out of the light emitted from the LED 4. The distance Z1 for preventing the reflected light from the lower surface 23b of the light 23 from entering the light receiving surface 5a and the distance Z3 for preventing the light once reflected inside the cover glass 23 from entering the light receiving surface 5a differ depending on X and Y. When X and Y become longer, Z1 and Z3 also become longer. Conversely, when X and Y become shorter, Z1 and Z3 become shorter. As described above, the design values shown in Table 1 can be set according to which region the reflected light is blocked.

  Moreover, in the said embodiment, although demonstrated using the pulse rate as an example as biometric information, not only a pulse rate but biometric information may be sufficient.

  Moreover, you may add functions, such as a radio | wireless communication means which can be communicated by radio | wireless with another electronic device, to a housing. In this way, the pulse rate recorded in the memory can be transmitted to an external electronic device or various information can be obtained in the memory by wireless communication such as Bluetooth.

  An output result detected by the PD 5 when using the biological information measuring apparatus 1 according to the embodiment will be described.

  In the present embodiment, the voltage threshold value α when the LED 4 is in the OFF state is 1.9 V, and the voltage threshold value β and the voltage threshold value γ when the LED 4 is in the ON state are 0.4 V and 1.8 V, respectively. The PD 5 used here will be described on the assumption that the voltage value output by the PD 5 decreases as the incident light intensity increases. That is, that the measured voltage is α or less is 1.9 V or less, and that the measured voltage is β or more and γ or less indicates 0.4 V or more and 1.8 V or less.

  As shown in FIG. 14, the state 1 shows a state where the biological information measuring device 1 is not worn on the wrist A in a dark state with no external light. First, when the LED 4 is in the OFF state, since there is no external light and no LED 4 light, no light is incident on the PD 5, so the output voltage (measured value) from the PD 5 is about 2V. Next, when the LED 4 is turned on, there is no external light, but the light irradiated by the LED 4 and reflected by the surface of the cover glass 23 and the light propagated through the inside are incident on the PD 5, so the output voltage (measured value) from the PD 5 Becomes a value slightly exceeding 1.8V.

  Next, in state 2, the biological information measuring device 1 is attached to the wrist A in a dark state with no external light. First, when the LED 4 is in the OFF state, since there is no external light and no LED 4 light, no light is incident on the PD 5, so the output voltage (measured value) from the PD 5 is about 2V. Next, when the LED 4 is turned on, there is no external light, but light irradiated by the LED 4 and propagated through the cover glass 23 and light scattered back in the living body enter the PD 5, so that the output voltage (measurement) from the PD 5 is measured. Value) is about 1.4V.

  Next, in state 3, the intensity of external light is about 600 Lx and the biological information measuring device 1 is not attached.

  First, when the LED 4 is in the OFF state, there is no external light and no LED 4 light, but there is external light, so the output voltage (measured value) from the PD 5 is about 0.12V. Next, when the LED 4 is turned on, the external light and the light irradiated by the LED 4 and propagated through the cover glass 23 are incident on the PD 5, so that the output voltage (measured value) from the PD 5 is about 0.11V. These results are slightly different depending on the intensity of external light, the state of the living body surface, the distance between the LED 4 and the PD 5, etc. However, when the LED 4 is in the OFF state based on these results, the measured value of the PD 5 is less than 1.9V. Assuming that external light is incident on PD5, it can be determined that LED4 and PD5 are not in contact with living body surface B. Further, when the LED 4 is in the OFF state and the measured value of the PD 5 is higher than 1.9V, and the LED 4 is in the ON state and the measured value of the PD 5 is higher than 1.8V, the back scattered light from the living body to the PD 5 If the LED 4 and the PD 5 are not in contact with the living body surface B, and the LED 4 is in the ON state and the measured value of the PD 5 is less than 0.4 V, the PD 5 has an object other than the living body. It can be determined that the LED 4 and the PD 5 and the living body surface B are in a non-contact state as the reflected light from the light is incident.

  In this embodiment, the threshold values are 1.9 V, 1.8 V, and 0.4 V, respectively, but the threshold setting values are not limited to this.

It is a front view which shows one Embodiment of the biological information measuring device which concerns on this invention. It is a rear view of the biological information measuring device shown in FIG. It is a side view which shows the state with which the biological information measuring device shown in FIG. 1 was mounted | worn on the wrist, and is the figure seen from the direction opposite to the direction shown in FIG. It is a perspective view which shows the state which looked at the biological information measuring device shown in FIG. 1 from diagonally upward. It is a cross-sectional arrow CC figure of the biological information measuring device shown in FIG. It is a cross-sectional arrow DD figure of the biological information measuring device shown in FIG. It is sectional drawing which shows the biometric sensor part of the biometric information measuring apparatus shown in FIG. It is a flowchart figure which shows the contact detection performed in the data processing part of the biological information measuring device shown in FIG. It is sectional drawing which shows the other modification of the biosensor part of the biometric information measuring device shown in FIG. It is sectional drawing which shows the other modification of the biosensor part of the biometric information measuring device shown in FIG. It is sectional drawing which shows the other modification of the biosensor part of the biometric information measuring device shown in FIG. It is a top view which shows the other modification of the biological information measuring device shown in FIG. It is sectional drawing which shows the positional relationship of LED and PD of the biological information measuring device shown in FIG. In the Example in this invention, it is a graph which shows the voltage value output by PD by the contact state of a biosensor part and a biological body.

Explanation of symbols

B Living body surface (living body)
1,50 Biological information measuring device 2 Housing (main body)
2a Bottom surface of the body 4 LED (light emitting part)
5 PD (light receiving part)
7 Data processing unit (biological information detection unit)
7a Judgment part 8 Biosensor part 23 Cover glass 23a Reflecting surface 40 Optical fiber 40a One end of optical fiber 40b The other end of optical fiber 41 Recessed part (condensing part)

Claims (4)

The body,
A biological sensor unit that is provided in the main body and emits light toward the living body to generate a biological information signal corresponding to the amount of backscattered light from the living body;
A biological information calculation unit that is provided in the main body and calculates biological information based on the biological information signal;
A detection unit that is arranged on the lower surface side of the main body and detects whether the biological sensor unit is in contact with the surface of the biological body;
A light emitting unit for irradiating the living body with light;
A cover glass that is disposed on the lower surface of the main body, transmits and reflects the light emitted by the light emitting unit, and transmits the light backscattered in the living body;
A light receiving portion for receiving light transmitted through the cover glass;
A determination unit that determines whether the living body and the biological sensor unit are in contact with each other based on a light reception signal received by the light receiving unit ;
A biological information measuring apparatus comprising a reflective surface that is disposed between the light emitting unit and the light receiving unit and reflects a part of light propagating through the cover glass on the cover glass. The body,
A biological sensor unit that is provided in the main body and emits light toward the living body to generate a biological information signal corresponding to the amount of backscattered light from the living body;
A biological information calculation unit that is provided in the main body and calculates biological information based on the biological information signal;
A detection unit that is arranged on the lower surface side of the main body and detects whether the biological sensor unit is in contact with the surface of the biological body;
A light emitting unit for irradiating the living body with light;
A cover glass that is disposed on the lower surface of the main body, transmits and reflects the light emitted by the light emitting unit, and transmits the light backscattered in the living body;
A light receiving portion for receiving light transmitted through the cover glass;
A determination unit that determines whether the living body and the biological sensor unit are in contact with each other based on a light reception signal received by the light receiving unit ;
A biological information measuring apparatus comprising a bundle-shaped optical fiber having one end disposed on the cover glass and the other end disposed close to the light receiving surface of the light receiving unit. The body,
A biological sensor unit that is provided in the main body and emits light toward the living body to generate a biological information signal corresponding to the amount of backscattered light from the living body;
A biological information calculation unit that is provided in the main body and calculates biological information based on the biological information signal;
A detection unit that is arranged on the lower surface side of the main body and detects whether the biological sensor unit is in contact with the surface of the biological body;
A light emitting unit for irradiating the living body with light;
A cover glass that is disposed on the lower surface of the main body, transmits and reflects the light emitted by the light emitting unit, and transmits the light backscattered in the living body;
A light receiving portion for receiving light transmitted through the cover glass;
A determination unit that determines whether the living body and the biological sensor unit are in contact with each other based on a light reception signal received by the light receiving unit ;
A biological information measuring device comprising: a condensing unit that condenses backscattered light from the living body on a surface of the cover glass facing the light receiving unit. The said light-receiving part receives the backscattered light from the said biological body which permeate | transmitted the said cover glass, and produces | generates the biological information signal according to the light quantity of backscattered light . The biological information measuring device according to 1.

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