JP2015154868A - Biological information collection device and biological information collection method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable acquisition of biological information in a situation where an observee is not exercising such as riding in a vehicle.

SOLUTION: A biological information collection device comprises: an observee body motion detection part for detecting a body motion of an observee; a boarding determination part for determining whether or not the observee is riding in a vehicle; a biological information acquisition part for acquiring biological information when the body motion of the observee is estimated to be small on the basis of a value of the body motion detected by the observee body motion detection part and information on whether or not the observee is riding in the vehicle obtained by the boarding determination part; a biological information storage part for storing the biological information acquired by the biological information acquisition part; and an output part for outputting the biological information stored by the biological information storage part.

COPYRIGHT: (C)2015,JPO&INPIT

Description

  The present invention relates to a biological sensor that acquires biological information such as pulse wave / pulse rate / oxygen saturation / respiration rate.

  In recent years, the importance of healthcare has been screamed, and various companies have reported biometric information (electrocardiogram, heart rate, body movement (steps, amount of activity), body temperature, pulse rate, pulse wave, blood pressure, blood sugar level, brain wave, Biosensors for obtaining body weight and body fat) are on the market.

  Among these, for example, among the pulsometers that acquire the pulse rate, there are portable pulsometers that can measure the pulse at any time by carrying them. However, if the pulse rate is measured while the user of the pulse meter is exercising, it is desirable to measure the pulse in a stationary state because the blood flow at the measurement site changes due to the movement itself.

  For example, Patent Document 1 discloses a pulsometer in which a body motion sensor (acceleration sensor) is mounted on a pulsometer and the pulse is not measured when the body motion level is greater than a threshold value. .

JP 2005-95653 A

  However, when the user of the pulse meter listed in the above-mentioned prior art rides on the vehicle, the body motion sensor (acceleration sensor) detects the vibration of the vehicle, and the pulse of the pulse sensor is the same as when the user is exercising. Measurement will not be performed. However, since the user is not actually exercising, it was originally possible to measure the pulse, and in this case, the opportunity to measure the pulse is missed.

  The present invention has been made in view of the above problems, and its purpose is to measure biological information such as a pulse in a situation where the user is not exercising even when the user is on a vehicle. It is what makes it possible.

  In order to solve the above-described problem, a biological information collection device according to one aspect of the present invention includes an observer's body movement detection unit that detects an observer's body movement, and whether the observer is on the vehicle. A vehicle boarding determination unit for determining the biological information, and a biological information acquisition unit for acquiring biological information, and when the body motion detection unit determines that the body movement of the person being observed is below a detection level, or the vehicle boarding The biometric information acquired by the biometric information acquisition unit is regarded as valid information when the determination unit determines that the observer is on the vehicle.

  Even if the detection value of the body motion sensor is large, the biological sensor of the present invention measures biological information (such as a pulse) when it is determined that the body sensor is on the vehicle. There is an advantage that measurement opportunities for (users) can be increased.

The block diagram for demonstrating the portable biosensor of this invention. The flowchart of the process which accumulate | stores the measured biometric information. The external view which shows the example of this apparatus of a wristwatch type. The figure which shows the example which is implementing this apparatus.

  FIG. 1 is a block diagram for explaining a schematic configuration of a portable biosensor 100 according to an embodiment of the present invention. The portable biosensor 100 acquires biometric information such as a pulse wave / pulse rate / oxygen saturation / respiration rate with a size that can be worn by an observer (user). Each block constituting the portable biosensor 100 will be described below.

  The biological information acquisition unit 101 is a part that acquires biological information of the person to be observed as exemplified above, and acquires changes in the biological information of the person to be observed using an LED / photo detector, a microphone, or the like. For example, the light emitted from the LED is reflected on the surface of the body of the person to be observed, the reflected light is acquired by a photodetector, and the intensity of the reflected light is measured, whereby the pulse wave is based on the change in the intensity. Can be obtained. The pulse rate can be obtained by counting how many pulse wave peaks are present in one minute. Moreover, the oxygen saturation can be measured by emitting light of two different wavelengths and measuring the intensity of each reflected light. Moreover, the pulse rate and respiration rate can be acquired by frequency-analyzing and measuring the audible sound obtained from the chest. The biometric information storage unit 102 is configured by a flash ROM, a DRAM, or the like, and stores the biometric information acquired by the biometric information acquisition unit 101. The stored biometric information is output by being displayed on the display unit 105 as needed or transmitted to the outside through the information transmission unit 106. Note that the biometric information storage unit 102 is not an essential element, and an embodiment in which the biometric information is immediately displayed on the display unit 105 without being stored or transmitted to the outside through the information transmission unit 106 is also conceivable. Similarly, the display unit 105 is not an essential element, and an embodiment in which the biological information acquired by the biological information acquisition unit 101 is simply transmitted to the outside through the information transmission unit 106 is also conceivable. Conversely, an embodiment in which there is no information transmitting unit 106 and only the biological information acquired by the biological information acquiring unit 101 is displayed on the display unit 105 is also conceivable.

  The body motion detection unit 103 to be observed detects the body motion of the subject. In addition, the vehicle boarding determination unit 104 determines whether the observer is on the vehicle. Then, the control unit 107 controls each unit described above.

  In the prior art, when the body movement level is larger than the threshold value, the pulse (one of biological information) is not measured, but when the body movement is actually large, there are two possible reasons. . One is a case where the body movement is actually large. In this case, it is difficult to acquire correct biological information, so there is no problem not to acquire the biological information. The other is a case where the body movement is small but the vehicle is in a vehicle and a large body movement is detected by the movement of the vehicle. In this case, it is considered that the body movement is actually small. You should get it. In order to make such a determination, in the present invention, the following process is performed using the observer's body motion detection unit 103 and the vehicle boarding determination unit 104.

  If the value of the body motion detected by the person-to-be-observed body motion detection unit 103 is equal to or less than a certain value, the biological information is acquired without confirming whether or not the vehicle has been boarded.

  When the value of the body motion detected by the person-to-be-observed body motion detection unit 103 is larger than a certain value and the vehicle boarding determination unit 104 determines that the vehicle is on the vehicle, biometric information is acquired. To do.

  When the value of the body motion detected by the person-to-be-observed body motion detection unit 103 is larger than a certain value and the vehicle boarding determination unit 104 determines that the vehicle is not on the vehicle, biometric information is acquired. do not do.

  This will be described in more detail below.

  The observer's body movement detection unit 103 detects the body movement of the person to be observed, and when there is no body movement or is small enough not to affect the measurement (when the body movement is below the detection level), The information acquisition unit 101 acquires biological information.

  The vehicle boarding determination unit 104 determines whether or not the subject is on the vehicle. Examples of the vehicle boarding determination unit include the following first to fourth embodiments.

  (Embodiment 1) A GPS receiver is used.

  By receiving signals from a plurality of GPS satellites, the moving speed of the receiving apparatus can be acquired together with the reception position (latitude / longitude / altitude). By thresholding the acquired movement speed, movement by walking (with body movement (many movement)) or movement by car / train etc. (no body movement (body movement does not affect measurement) Judgment is less) less)). For example, if the moving speed of the receiving device is 10 km / h or more, it is estimated that the vehicle is moving such as a car / train and there is no body movement.

  Further, based on the acquired latitude / longitude and map information (may be stored in advance in the terminal or may be acquired through an external network, etc.), whether the person to be observed is in a building, a sidewalk, etc. It may be determined that the user is on the track of the train or the train, and when on the roadway or the track, he / she is on a car / train and is determined not to move. Further, it may be determined whether or not the vehicle is on the vehicle in accordance with the moving speed. In other words, even if you are on the roadway, if the moving speed is lower than the threshold value, you can get on the pedestrian crossing on foot (not on the vehicle) It may be determined whether or not.

  (Embodiment 2) WiFi is used.

  The presence or absence of the person to be observed is determined according to a WiFi access point (AP) around the person to be observed. For example, an AP identifier (SSID) or MAC address is confirmed, and if it is disclosed in a vehicle of a transportation facility, the person to be observed is determined to be in the vehicle.

  Alternatively, estimation is performed according to the visible time of the AP. In other words, since the distance that the radio wave transmitted from the AP can reach is finite, this apparatus can find the AP (visible) when it is within the radio wave reachable range and the movement of the observer When the speed is high, the time in the radio wave reachable range (visible time) is short, and when the moving speed is slow, the time in the radio wave reachable range is long. By using this, it is determined that the vehicle is on a car / train when the visible period is less than or equal to the threshold value, and that the vehicle is walking (not boarded) when the visible period is greater than the threshold value. In addition, although the example in the said visible time was given, you may estimate by the speed of the change of received signal strength (RSSI). In other words, when the distance from the AP changes, the received signal strength also changes, so if the received signal strength changes faster than the site, you are on a car / train, etc. Estimate (not on board).

  (Embodiment 3) A non-contact device such as Felica or NFC is used.

  In this embodiment, the person-to-be-observed body motion estimation unit 103 detects electric power due to electromagnetic induction that occurs when the non-contact device touches the Reader / Writer. Each time this detection is performed, the state in which the observed person gets on the bus or the train and the state where the person gets off are toggled.

  When a non-contact device such as Felica or NFC is used to pay the fare when an observer gets on or gets off a bus or train, it can be estimated that it is time to get on or get off the bus / train. Therefore, it is possible to determine whether or not the subject is on board.

  (Embodiment 4) A mechanism related to indoor positioning such as Bluetooth (registered trademark) (BT) or IMES is used.

  Since the GPS uses signals from satellites, it is difficult to use in buildings and underground facilities such as buildings. Therefore, positioning methods using BT, IMES, etc. to realize indoor / underground navigation, etc. Has been proposed. In these, a user terminal receives a signal from a BT beacon or an IMES transmitter, and determines the position of the user terminal from an ID signal from the BT and IMES position information (latitude / longitude / floor, etc.). It is determined whether or not the user is in the vehicle according to the position of the user terminal (portable biosensor 100 in the present application). For example, if it is a store in a building, it is possible to measure biological information on the assumption that the user is browsing products or eating (there is no body movement, or the artifacts included in the measured biological information are sufficient) If there is only a small amount of body movement), and if it is a passage in a building, it is determined that it is impossible to measure biological information (not on board) assuming that it is walking between stores.

  The display unit 105 includes a liquid crystal, an LED, an organic EL, and the like, and displays information obtained from the biological information acquisition unit 101 or information obtained from the biological information accumulation unit 102 that accumulates the biological information over the past. , So that the user can refer to it. For example, the pulse wave is displayed in a graph, and the pulse rate, oxygen saturation, and respiratory rate are displayed in numbers. If a plurality of types of biological information can be acquired by the biological information acquisition unit 101, a plurality of pieces of biological information can be displayed in parallel, or switched at regular intervals (input buttons, touch panels, etc. not shown) The user may accept a user operation to switch the display.

  The information transmission unit 106 transmits the information obtained by the biological information acquisition unit 101 or the information obtained from the biological information accumulation unit 102 that accumulates the biological information over the past so that it can be referred to other than the present apparatus. To do. It may be wired such as USB or wireless such as WiFi / Bluetooth (registered trademark) / ZigBee (registered trademark). For example, it may be possible to transmit biometric information to a PC using Bluetooth, accumulate data for a long period of time, refer to past data, analyze biometric information on the PC, and diagnose a health condition or the like. It is done. While measuring biometric information, it may be transmitted sequentially to a notebook PC or a smartphone, or data for a certain period such as one day may be stored in this apparatus and transmitted to a PC or the like in bedtime.

  FIG. 2 is a flowchart in which measured biological information is stored in the biological information storage unit 102 while being sequentially displayed on the display unit 105.

  The trigger for starting the measurement of the biological information of the person to be observed may be that the person to be observed (user) operates an operation unit (not shown) or that a predetermined time has come.

  In the S1 (body motion detection) step, the body motion detection unit 103 of the subject detects the body motion of the subject.

  Next, the process proceeds to step S <b> 2, and the value of the body motion detected by the person-to-be-observed body motion detection unit 103 is larger than a specified value (a value that may cause an error in measurement of biological information if there is a body motion larger than that). In step S3, the vehicle boarding determination unit 104 determines whether the observer is on the vehicle.

If it is determined in step S3 that the vehicle is not being boarded, data acquired by the biological information acquisition unit 101 may contain noise and may not be worthy of evaluation, and thus biological information is not measured. In this flowchart, the implementation is described in which the biological information is not measured when the body motion is larger than the specified value and the vehicle is not in the vehicle, but the measurement itself is continuously performed, and the body motion is larger than the specified value and the vehicle is in the vehicle. If it is determined that it is not, the implementation may be such that biometric information is not stored and / or displayed. (In addition, when biometric information is stored, it is possible to implement information that also stores information on body movements and whether or not the vehicle is on board.)
If it is determined that the body motion is larger than the specified value and the vehicle is not being boarded, the body motion may be detected by returning to S1 (body motion detection) immediately afterwards, or the body motion may be detected for a while. As a continuation, body motion detection may be performed after a certain time (for example, about 30 seconds). In the latter method, the effect of reducing the power consumption of the portable biosensor 100 can be expected by pausing body motion detection for a certain period.

  If the body movement is less than the specified value in step S2 or if it is determined in step S3 that the vehicle is on the vehicle, the process goes to step S4 (measurement of biological information), and the biological information acquisition unit 101 measures the biological information.

  Next, in the step S5 (accumulate biometric information) (if necessary), the data measured by the biometric information acquisition unit 101 is accumulated for later reference or later transfer to another device such as a PC. To do. Since the amount of information that can be stored is limited, when the amount of information reaches the upper limit, the measurement may be stopped and the measurement stop may be notified to the person (user) to be observed through the display unit 105. It may be implemented so that it is deleted sequentially and the latest data is retained.

Next, it goes to S6 (display biological information) step, and displays the information measured in S4 (measure biological information) step. By displaying the latest measurement information at all times during measurement, the person to be observed (user) can confirm the current state or grasp that the measurement operation is in progress. (Note that S5 and S6 are not essential steps, and instead of displaying the biological information in the step S6, an embodiment in which processing for transmitting the biological information to another device is also conceivable.)
After determining that the vehicle is not being boarded in step S3, or after step S6, it is determined whether or not the measurement of the biological information is ended in step S7 (for example, after a certain time from the start / a certain amount of data / If it does not end, it returns to the S1 (body motion detection) step and detects again whether body motion has occurred ([S1]).

  Once it is determined that “the body movement is less than the specified value or the vehicle is being boarded”, the body information is continuously detected without performing body movement detection or vehicle boarding determination for a certain period (for example, 10 seconds). Good. This is based on the premise that the observer frequently does not change these states. By stopping these detections and determinations for a certain period of time, an effect can be expected to reduce the power consumption of the portable biosensor 100.

  FIG. 3 is a schematic view of a watch-type device 200 of the present invention. Here, 204 is a display unit, 210 is an operation button, 211 is a belt, and 212 is an observer's hand. Although not shown in the figure, a biological information acquisition unit exists on the back side of this device (a part in contact with the arm). In this figure, when the operation button 210 is pressed, measurement of the pulse and oxygen saturation is started, and when a predetermined time (for example, 1 minute) has elapsed, the pulse and oxygen saturation are displayed on the display unit 204 based on the biological information acquired so far. Display the degree. Another possible implementation is that the operation button 210 is toggled between “start” and “stop”. In this case, measurement of biological information is started when the start is pressed, and measurement of biological information is stopped when the stop is pressed. To do. The data displayed by the display unit 204 may be implemented by displaying the acquired biological information in real time, or after measurement (after a predetermined time has passed since the start button was pressed, or by pressing the stop button) After that, it may be possible to display the biological information based on the measurement results up to that point.

  FIG. 4 is a diagram of an example implementing the apparatus of the present invention. Here, 301 is a person to be observed A, 302 is a person to be observed B, 303 is this apparatus A, 304 is this apparatus B, 310 is a vehicle, and 311 is a GPS satellite.

  In FIG. 4, the person A301 to be observed gets on the vehicle 310 and moves. Therefore, the vehicle boarding determination unit 104 of the apparatus A303 worn by the subject A301 detects the moving speed of the vehicle 310 (assuming 30 km / h here) as the moving speed of the subject A. In the vehicle boarding determination unit 104, the movement speed of the person A to be observed is equal to or higher than the threshold of 10 km / h. The biometric information is measured.

  On the other hand, the person to be observed B302 is moving on foot. Therefore, the vehicle boarding determination unit 104 of the present apparatus B304 worn by the person to be observed B302 detects the movement speed of the person to be observed B302 itself (here, 5 km / h) as the movement speed of the person to be observed B. The vehicle boarding determination unit 104 determines that the person B is unsuitable for measuring biological information because the person B is moving on foot or the like because the movement speed of the person B is less than the threshold value of 10 km / h. However, measurement of biological information is not performed.

(Embodiment 5)
In the present embodiment, not only the biological information obtained by the biological information acquisition unit 101 but also the information (position, moving speed, etc.) obtained by the vehicle boarding determination unit 104 is recorded in the biological information storage unit 102. As an effect of this, it can be used for estimation of a cause when biometric information is changed, determination of whether or not a disease is present, and the like. For example, if a pulse rate higher than normal can be acquired, if the position recorded with a string indicates a bathroom, it can be determined that there is no problem because it is an increase in the pulse rate due to bathing, and if it is a bedroom It can be determined that there is a possibility of illness. Similarly, if the moving speed is about 5 km / h to 10 km / h when a pulse rate higher than normal can be obtained, it can be determined that walking or jogging, and the pulse rate is increased by walking or jogging. Therefore, it can be determined that there is no problem, and if the moving speed is about 0 km / h, it can be determined that there is a possibility of illness. Thus, by evaluating the position and moving speed together, it is possible to grasp a more advanced situation.

(Embodiment 6)
In the above, an example is shown in which the vehicle ride determination unit 104 determines whether or not the vehicle is on board and controls whether or not to acquire biometric information. In this embodiment, the biological information acquisition unit 101 always acquires biological information and records it in the biological information storage unit 102, and body movement is generated using the value obtained by the vehicle boarding determination unit 104 together with the biological information. Or the like is stored in the biological information storage unit 102. By analyzing these accumulated data, it is possible to estimate the situation of the person to be observed in more detail.

For example,
b (t) × (1-r (t))
b (t): Deviation from the average of the acquired pulse rate at time t (absolute value)
r (t): Possibility of estimated body movement at time t (0: no possibility to 1: occurrence)
By evaluating with the above formula, the deviation from the average pulse when there is little body movement can be evaluated, and when the calculated value is large, it can be used for the determination of performing a more detailed diagnosis.

  The possibility of body movement is most likely to occur at a speed estimated to be walking (for example, the moving speed is 5 km / h), and then the vehicle is on a vehicle. It is conceivable to set such that the possibility of occurrence of body movement becomes low at a speed that is estimated to be higher than the estimated speed (for example, the moving speed is 20 km / h). That is, when the moving speed is from 0 km / h to the first threshold value (for example, 5 km / h), the possibility of occurrence of body movement increases linearly (from 0 to 1) according to the moving speed, and the moving speed is From the threshold value 1 to the second threshold value (for example, 20 km / h), the possibility of occurrence of body movement decreases linearly (from 1 to 0) according to the moving speed, and the moving speed If the threshold value is exceeded, it is considered that there is no possibility of occurrence of body movement (0).

  The portable biosensor according to each aspect of the present invention may be realized by a computer. In this case, the morphological biosensor is turned into a computer by operating the computer as each unit included in the portable biosensor. The program to be realized and the computer-readable recording medium on which the program is recorded also fall within the scope of the present invention.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention. Furthermore, a new technical feature can be formed by combining the technical means disclosed in each embodiment.

DESCRIPTION OF SYMBOLS 100 Portable biosensor 101 Biometric information acquisition part 102 Biometric information storage part 103 Observer body motion detection part 104 Vehicle boarding determination part 105 Display part 106 Information transmission part 107 Control part

Claims (5)

A body motion detection unit for detecting the body motion of the subject;
A vehicle boarding determination unit that determines whether the observer is on the vehicle;
A biometric information acquisition unit for acquiring biometric information,
The living body when the body motion of the subject is determined to be below a detection level by the body motion detection unit or when the subject is determined to be on the vehicle by the vehicle boarding determination unit. A biological information collecting apparatus characterized in that biological information acquired by an information acquisition unit is regarded as valid information.   The biological information collection apparatus according to claim 1, further comprising an output unit that outputs the biological information acquired by the biological information acquisition unit. Furthermore, a biological information storage unit that stores the biological information acquired by the biological information acquisition unit,
The biological information storage unit records information obtained by the vehicle boarding determination unit and biological information in association with each other,
The biological information collecting apparatus according to claim 2, wherein the output unit outputs the biological information acquired by the biological information acquisition unit or the biological information stored by the biological information storage unit. The output unit is
The biological information collection device according to claim 2, wherein the biological information collection device is a display unit that displays the biological information or an information transmission unit that transmits the biological information to an external device. A subject motion detection step for detecting the subject's motion,
A vehicle ride determination step for determining whether the observer is on the vehicle;
A biological information acquisition step of acquiring biological information;
When the body movement of the person to be observed is determined to be lower than the detection level by the body movement detection step, or when the person to be observed is determined to be on the vehicle by the vehicle boarding determination step A biological information collecting method, wherein the biological information acquired in the information acquisition step is regarded as valid information.