JP2018121818A - Biological information detection sensor and biological information measurement system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately detect and measure desired biological information from a local position to be detected by a simpler method and processing irrespective of a difference in a body shape of each person whose biological information is to be detected.SOLUTION: A biological information detection sensor 10 includes an array-shaped biological potential sensor 12, a signal processing part 13, a radio module 14, and a battery 15 on the front side, for example, of a T-shirt 11 worn by a person whose biological information is to be detected. The array-shaped biological potential sensor 12 consists of a plurality of biological potential sensors 120 and one sensor 129 for a reference voltage of the same configuration arranged in an array shape, which are electrically connected to each other by a flexible wire 16. The biological potential sensors 120 are composed mainly of a biological potential sensor electrode and a touch sensor. The touch sensor of the biological potential sensor in an arbitrary position of the plurality of the biological potential sensors 120 is selected and touched, and biological information is acquired based on a biological information detection signal from the sensor electrode of the biological potential sensor.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a biological information detection sensor and a biological information measurement system, and more particularly to a biological information detection sensor that is provided on clothes and detects biological information of a human body and a biological information measurement system that measures detected biological information.

  In recent years, there has been a demand for a biometric information detection sensor capable of constantly monitoring biometric information as health consciousness becomes stronger. One type of biometric information that is widely demanded is electrocardiographic information, which enables examination of arrhythmia, ischemic disease, and the like. As a conventionally known biological information detection sensor capable of monitoring 24-hour electrocardiographic information, there is an electrocardiographic sensor called a Holter electrocardiograph (see, for example, Patent Document 1). The Holter electrocardiograph is a portable electrocardiographic examination device that can be carried, acquires electrocardiographic information from electrodes of 3 to 4 poles, and records the electrocardiographic information in a portable recording unit for 24 hours. Get ECG information. This Holter electrocardiograph is still widely used as a simple inspection device even today.

  However, in the Holter electrocardiograph, it is necessary to route the electrode wiring around the body surface, and the user's wearing feeling is poor. In addition, it is necessary to always carry the electrocardiographic information recording part, which is one of the causes of the user's wearing feeling worsening.

  Therefore, recently, a biological information detection sensor called a wearable terminal using a flexible sensor and a wiring technique has attracted attention. As such wearable terminals, for example, textile-type wearable terminals that can acquire biological information such as electrocardiogram information by simply forming a sensor, a signal processing unit, and a wireless circuit on clothes and wearing the clothes have been developed and studied. Particularly in Japan, textile-type wearable terminals with sensors formed on clothing made of “hitoe” (registered trademark), which is a conductive fiber for bioelectrodes in which a conductive polymer is impregnated with nanofiber knit, are famous. (For example, refer nonpatent literature 1 and patent literature 2).

  In addition, biological information detection sensors such as textile-type wearable terminals have been developed and studied by various research institutions and companies (see, for example, Patent Documents 3-5). That is, Patent Document 3 discloses an electrocardiographic cloth having a configuration in which a plurality of measurement electrodes that are attached to a subject and measure an electrocardiogram are formed and arranged with conductive threads at predetermined positions. Patent Document 4 discloses a device for determining a person's stress level and providing feedback based on the determined stress level, and a body sensor for detecting a body parameter related to stress is included in the textile structure. There is disclosed a biological information detection sensor having a configuration incorporated in the above. Further, Patent Document 5 discloses a configuration in which a conductive region and a non-conductive region are formed by binding and weaving a conductive yarn and a non-conductive yarn, and a plurality of electrodes made of the conductive region are arranged. An electroded fabric is disclosed.

JP-A-6-197875 Japanese Patent Laying-Open No. 2015-70917 JP 2016-158709 A Special table 2008-529576 JP 2011-15817 A

Masahiro Sano, “Toray and NTT,“ hitoe ”that can measure heart rate just by wearing--service provided in 2014”, [online], search November 16, 2014, Internet (URL: http: / /japan.cnet.com/news/service/35043275/)

  However, biological information detection sensors such as textile-type wearable terminals are very useful in that they can constantly monitor electrocardiographic information without a feeling of wearing, but due to differences in the body shape of the wearer (hereinafter also referred to as the detected person). However, there is a problem in that measurement points for each person to be detected are displaced and it is difficult to detect accurate electrocardiographic information. As the simplest countermeasure against this problem, it is conceivable to arrange a biometric information detection sensor for each person to be detected. However, since the number of persons to be detected is enormous and their body shapes vary, productivity and price are limited. It is difficult to realize.

  On the other hand, it is possible to reduce the influence of measurement point deviation by making the electrode area of the biological information detection sensor large, but it is difficult to acquire local electrocardiographic data by increasing the electrode area. . Also known is a biological information detection sensor of the type that is wound around the body surface with Velcro (registered trademark) or the like. This sensor is used by a doctor or the like to adjust the position of an electrode for each person to be detected. The information detection sensor must be wound, and the mounting operation is complicated and troublesome. Furthermore, a biological information detection sensor (see Patent Document 4) that detects a body parameter related to stress by arranging a large number of body sensors on the textile, or a biological information detection sensor configured to array electrodes of a plurality of electrocardiographic sensors on the textile. (See Patent Document 5).

  However, these are the configurations that perform the required signal processing using the signals of all of the plurality of electrodes (body sensors), and it is difficult to accurately obtain only biological information according to the body shape of the subject, There is no technical idea of selecting only necessary electrodes (body sensors) corresponding to the body shape of the examinee from the electrodes (body sensors). In addition, since the biological information detection sensors described in Patent Documents 4 and 5 use signals of all of a plurality of electrodes, there is a large amount of biological information data to be transmitted because there is a large amount of biological information data to be transmitted, and a large-capacity and expensive memory is required. Also, there is a problem that power consumption is large.

  The present invention has been made in view of the above points, and accurately detects desired biological information from a local detected position by a simpler method and processing, regardless of the difference in body shape of each person to be detected of biological information. It is an object of the present invention to provide a biological information detection sensor and a biological information measurement system that can measure the distance.

  In order to achieve the above object, a biological information detection sensor of the present invention includes an array-shaped biopotential sensor including three or more biopotential sensors arranged in an array on a textile worn by a person to be detected, The potential sensor includes a touch sensor provided on the surface of the textile, and a sensor electrode provided at a position on the back side of the textile corresponding to an arrangement position of the touch sensor. The biometric information of the person to be detected is detected based on a biometric information signal from the sensor electrode of a biopotential sensor that is arbitrarily selected from the touched touch sensors.

  In order to achieve the above object, the biological information measuring system of the present invention includes a touch sensor provided on the surface of the textile worn by the person to be detected, and a back surface of the textile corresponding to the arrangement position of the touch sensor. A biopotential sensor comprising sensor electrodes provided at positions includes three or more array-shaped biopotential sensors arranged in an array on the textile, and each living body from each sensor electrode of the three or more biopotential sensors. Switching means for selecting the biological information detection signal output from the sensor electrode of the biopotential sensor touched by arbitrarily selecting the touch sensor from the information detection signals, and the output output from the switching means Amplifying means for amplifying a living body information detection signal and outputting it as a living body information signal, and the living body outputted from the amplifying means A transmitting means for transmitting an information signal; a receiving means for receiving the biological information signal transmitted by the transmitting means; and a biological information measurement signal waveform of the detected person based on the biological information signal received by the receiving means. And a calculation means for displaying on the display unit.

  According to the present invention, it is possible to accurately detect and measure desired biological information from a local detected position by a simpler method and process, regardless of the difference in body shape of each detected person of biological information.

It is a typical front view of one embodiment of a living body information detection sensor concerning the present invention. (A) is a plan view of one biopotential sensor, and (B) is a longitudinal side view taken along the line A-A ′ of (A). It is a block diagram of one embodiment of a living body information measuring system concerning the present invention. 1 is a schematic system configuration diagram of an embodiment of a biological information measurement system according to the present invention. It is a flowchart for operation | movement description of one Embodiment of the biometric information measurement system which concerns on this invention. It is a block diagram of an example of PC in FIG.

Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1: shows the typical front view of one Embodiment of the biometric information detection sensor which concerns on this invention. In the figure, a biological information detection sensor 10 according to the present embodiment includes an array-like biopotential sensor 12, a signal processing unit 13, and a radio on the front side of a T-shirt 11 as an example of clothes (textile) worn by a person to be detected. A module 14 and a battery 15 are provided. The arrayed bioelectric potential sensor 12 and the signal processing unit 13 are electrically connected by a flexible wiring 16. The battery 15 supplies power to the arrayed bioelectric potential sensor 12, the signal processing unit 13, and the wireless module 14 via the flexible wiring 16. The signal processing unit 13, the wireless module 14, and the battery 15 are attached with, for example, Velcro (registered trademark) so as to be removable from the T-shirt 11.

  The array-like biopotential sensor 12 is composed of 41 biopotential sensors 120 having the same configuration and one reference voltage sensor arranged at 42 positions in an array (or matrix) of 7 rows and 6 columns in FIG. 129 and electrically connected to each other by a flexible wiring 16 (specifically 161 or 162 described later). 2A is a plan view of one biopotential sensor 120, and FIG. 2B is a longitudinal side view taken along the line A-A ′ of FIG. In FIGS. 1A and 1B, the same components as those in FIG. 2A and 2B, the biopotential sensor 120 is mainly composed of a biopotential sensor electrode (hereinafter also simply referred to as a sensor electrode) 121 and a touch sensor 122.

  The touch sensor 122 has an extremely thin flat columnar shape (disk shape), and is electrically connected to the signal processing unit 13 via the flexible wiring 162, and outputs ON information when touched by a human finger. Since the configuration itself of the touch sensor 122 is not the gist of the present invention and is well known, the description of the configuration is omitted. The upper surface and side surface of the touch sensor 122 are protected by a transparent protective film 123. The protective film 123 has a function of covering and protecting the touch sensor 122 and its surroundings, and has a substantially cylindrical shape on the bottom surface with a diameter of about 10 mm to 20 mm. Since the protective film 123 is transparent, as shown in FIG. 2A, the touch sensor 122 and the flexible wiring 162 are seen through the protective film 123 so that the position of the touch sensor 122 can be seen. The touch sensor 122, the protective film 123, and the flexible wiring 162 are provided on the front surface of the T-shirt 11 by a known method as shown in FIG.

  A sensor electrode 121 having a desired planar shape and a relatively large area is applied to a position corresponding to the protective film 123 on the front and back surface of the T-shirt 11 by applying a known printing technique. Is formed. The sensor electrode 121 is electrically connected to a sensor electrode (not shown) of another biopotential sensor and the signal processing unit 13 through a flexible wiring 161. The flexible wirings 161 and 162 constitute the flexible wiring 16 of FIG. The thickness of the sensor electrode with a touch sensor composed of the sensor electrode 121 and the touch sensor 122 attached to the T-shirt 11 shown in FIG. 2B is about 2 to 3 mm, for example.

  Since the sensor electrode 121 is in direct contact with the chest which is the front body surface of the person to be detected, the material of the sensor electrode 121 needs to be flexible, and is made of a conductive member such as a conductive fiber. Since the flexible conductive member constituting the sensor electrode 121 is easily deformed along the chest of the person to be detected, the sensor electrode 121 is attached to the person to be detected without a sense of incongruity. As the conductive member, a thin plate made of metal such as platinum, gold or silver, carbon fiber, metal fiber, synthetic resin fiber, or the like is used. The flexible wirings 161 and 162 have the same flexibility as that of the sensor electrode 121, and a conductive pattern printed with a corrugated metal wiring or a stretchable metal paste or a fibrous material with a conductive coating is used. it can. The reference voltage sensor 129 is configured to output a reference voltage without a touch sensor and a sensor electrode.

  As the textile base material used in the present invention typified by the T-shirt 11, any material can be used as long as it is a flexible material, but textiles using nylon or polyester are preferably used. In order to form the sensor electrode 121, the touch sensor 122, the protective film 123, the flexible wirings 161 and 162, etc. on the T-shirt 11, it is necessary to affix using an adhesive material or an adhesive material between the layers. Any material can be used as the adhesive or adhesive as long as it has flexibility after application and curing on the T-shirt 11 and has sufficient tackiness and durability. An elastic adhesive, a butyl rubber adhesive, a silicon adhesive, or the like is used.

  As a patterning method for the flexible wiring 161 and 162, the sensor electrode 121, the touch sensor 122, and the protective film 123, the textile substrate used as the T-shirt 11 can be woven or knitted by a known method. Patterning can also be performed directly on the top by a technique such as printing. Preferably, a known method of sticking conductive short fibers on an adhesive material patterned by printing is used.

  Sufficient bonding strength and low contact for joining the sensor electrode 121 and the electronic component in the signal processing unit 13 by the flexible wiring 161 and joining the touch sensor 122 and the electronic component in the signal processing unit 13 by the flexible wiring 162 Resistance, durability, and low process temperature are required. Any joining material can be used for this joining as long as it has conductivity and adhesiveness, but preferably a conductive adhesive obtained by adding metal fine particles to a curable adhesive, or an anisotropic conductive material. Film / paste, a solder paste in which tin / bismuth-based low melting point alloy fine particles are added to a curable adhesive, and the like are used.

Next, an embodiment of a biological information measurement system according to the present invention will be described.
FIG. 3 shows a block diagram of an embodiment of the biological information measuring system according to the present invention. In the figure, the same components as those in FIGS. 1 and 2 are denoted by the same reference numerals. As shown in FIG. 3, the biological information measurement system 20 according to an embodiment of the present invention is configured by an array-like biopotential sensor 12, a signal processing unit 13, a wireless module 14, and a monitor system 30 (the battery 15 is Not shown). That is, the biological information measuring system 20 of the present embodiment has the configuration of the biological information detection sensor on the T-shirt 11 including the arrayed bioelectric potential sensor 12, the signal processing unit 13, the wireless module 14, and the battery 15 shown in FIG. The monitor system 30 is connected via a wireless line.

  In the array-like biopotential sensor 12, a plurality of biopotential sensors 120 (41 in the example of FIG. 1) each having the structure shown in FIGS. 2A and 2B are arranged in an array. In this case, the bioelectric potential sensor electrode 121 and the bioelectric potential sensor electrode 121 each having one bioelectric potential sensor electrode 121 and one reference voltage sensor 129 correspond to the bioelectric potential sensor electrode 121 in a one-to-one correspondence. And a touch sensor group 1220 including touch sensors 122 of a plurality of biopotential sensors arranged in an array.

  The signal processing unit 13 includes a first micro control unit (MCU) 131 for a touch sensor, an analog switching circuit 132, a differential amplifier 133, and a second micro control unit for an electrocardiogram signal. It is composed of a unit (MCU) 134. The first MCU 131 is electrically connected to each touch sensor 122 of the touch sensor group 1220 via the flexible wiring 162 separately, and a switching detection signal that detects the switching state of the plurality of touch sensors of the touch sensor group 1220. Is output to the analog switching circuit 132 as a switch control signal. Further, the first MCU 131 outputs a switching detection signal to the wireless module 14 described later.

  The analog switching circuit 132 is electrically connected to each sensor electrode 121 of the sensor electrode group 1210 via the flexible wiring 161 separately, and is a plurality of cardiac biological information detection signals obtained by the sensor electrode group 1210. An output path of the electrocardiogram signal to the differential amplifier 133 is controlled by a switch control signal from the first MCU 131. When the differential amplifier 133 is composed of one non-inverting input terminal (+) and one inverting input terminal (-), a total of n sets (n can be displayed on the screen of the PC 32 at the same time). It has an input terminal of the same number as the maximum number of ECG waveforms (the number of channels) and one reference voltage input terminal. Note that the maximum value of n is half the total number of touch sensors constituting the touch sensor group 1220 (or the total number of sensor electrodes constituting the sensor electrode group 1210). The number may be less than this value.

  The differential amplifier 133 is a first biological information detection signal supplied to a set of non-inverting input terminals from one sensor electrode in a sensor electrode group 1210 provided corresponding to a touched touch sensor. And a second biological information detection signal supplied to the same set of inverting input terminals from another sensor electrode in the sensor electrode group 1210 provided corresponding to another touch sensor touched A differential amplification signal based on a reference voltage (usually a ground voltage) from the reference voltage sensor 129 in the sensor electrode group 1210 is generated as an electrocardiographic signal of one channel by performing dynamic amplification. Output to the MCU 134. Similarly, the differential amplifier 133 can generate a total of n-channel electrocardiographic signals and output them to the second MCU 134. However, as will be described later, the differential amplifier 133 outputs an electrocardiogram signal of an arbitrary number m (where m ≦ n) of acquisition channels set by the diagnostician. The second MCU 134 performs AD conversion on the electrocardiogram signal from the differential amplifier 133 to generate electrocardiogram signal data, and outputs it to the radio module 14. The wireless module 14 performs wireless communication with the monitor system 30.

  The monitor system 30 includes a wireless module 31 and a personal computer (PC) 32. The wireless module 31 communicates with the wireless module 14 by weak wireless or low power wireless. As shown in the block diagram of FIG. 6, the PC 32 includes a calculation unit 321, a storage unit 322, a display unit 323, and an input unit 324 connected via a bidirectional bus 325, and a calculation unit 321 according to a program stored in the storage unit 322. It is set as the well-known structure which performs a predetermined | prescribed software operation | movement by the arithmetic processing by. The input unit 324 sets the mode of the biological information measurement system 20 to the electrode selection mode or the recording mode. The display unit 323 displays an electrocardiogram signal received by the arrayed bioelectric potential sensor 12 or the wireless module 31. The calculation unit 321 writes and reads electrocardiogram signal data to and from the storage unit 322. The PC 32 and the wireless module 31 are connected by a bidirectional bus 325.

  FIG. 4 shows a schematic system configuration diagram of an embodiment of the biological information measuring system according to the present invention. In the figure, the same components as those in FIGS. 1 to 3 are denoted by the same reference numerals, and the description thereof is omitted. As shown in FIG. 4, in the biological information measurement system 20 of the present embodiment, an array provided on the front surface of the T-shirt 11 in the electrode selection mode with the subject 50 wearing the T-shirt 11. A predetermined touch sensor is selected from the touch sensor group 1220 of the bioelectric potential sensor 12, and a diagnostician such as a doctor touches with a finger in order as indicated by a, b, c, and d. The touch sensor to be touched in the touch sensor group 1220 is determined by the diagnostician selecting a touch sensor at a position where an electrocardiogram waveform can be optimally acquired in accordance with the body shape of the person to be detected 50. Therefore, if the body shape of the person to be detected 50 changes, the optimal touch sensor that can acquire an electrocardiogram waveform is changed and selected accordingly by the diagnostician, so the position of the selected touch sensor is the position shown in FIG. It is not limited to.

  The biological information detection signal detected by the sensor electrode provided corresponding to the touch sensor that has been touched is sent to the wireless module 31 of the monitor system 30 via the signal processing unit 13 and the wireless module 14 by an operation described later. It is transmitted wirelessly as an electric signal. The monitor system 30 includes a wireless module 31 and a PC 32, and the PC 32 includes a housing 330 and a display unit 323. 6 is stored in the housing 330 of the PC 32, and the input unit 324 is provided outside the housing 330 as a keyboard (not shown). The PC 32 processes the electrocardiogram signal received by the wireless module 31 into a signal form suitable for display by the arithmetic unit 321 in the housing 330 and displays it on the display unit 323 as indicated by 42 and 43. A display waveform 42 is an ECG signal waveform of the first channel obtained by differential amplification of two biological information detection signals from the touch sensors at two positions indicated by a and b, and a display waveform 43 is c , D are ECG signal waveforms of the second channel obtained by differentially amplifying two biological information detection signals from touch sensors at two positions indicated by d. In addition, the touch sensor group 1220 of the arrayed bioelectric potential sensor 12 is displayed in the display area 41 of the display unit 323, and the touch sensor at the touched position in the display area 41 indicates the color of the surrounding touch sensor that is not touched. Are displayed in different predetermined hues.

  That is, in the display area 41 of the touch sensor group in the display unit 323, A, B, C, and D are touch sensors corresponding to the positions of the touch sensors indicated by a, b, c, and d respectively touched by the diagnostician. Are displayed with different hues from each other and different from the touch sensor that is not touched. Note that the touch sensor in the seventh row and first column in the display region 41 is displayed in black, indicating that it is a common ground reference voltage sensor. Note that the touched sensor position needs to be at least discriminated from the touched touch sensor position, so that the touched touch sensor position has a hue different from that of the touchless touch sensor and the same hue. May be displayed.

Next, the operation of the biological information measuring system 20 of the present embodiment shown in FIGS. 3 and 4 will be described with reference to the flowchart of FIG. FIG. 5 shows a flowchart for explaining the operation of the embodiment of the biological information measuring system according to the present invention.
First, the electrode selection mode is set by the input unit 324 of the PC 32 (step S1). When the electrode selection mode is set, an electrode selection mode signal is transmitted from the PC 32 to the wireless module 14 via the wireless module 31, and the touch sensor group 1220 is displayed in the display area 41 of the display unit 323 as shown in FIG. Is done. The wireless module 14 supplies the reception electrode selection mode signal to the MCU 131 for the touch sensor. When the reception electrode selection mode signal is supplied to the MCU 131, the MCU 131 is controlled to input permission of the sensor position signal supplied from the touch sensor group 1220 via the flexible wiring, and the analog switching circuit 132 is flexible from the sensor electrode group 1210. The detection signal supplied via the wiring is selectable.

  Subsequently, the PC 32 displays, for example, a message “Please input the number of acquired ECG waveforms” (not shown in FIG. 4) on the display unit 323 (step S <b> 2), and then any arbitrary input from the input unit 324. The ECG waveform acquisition number is set as the acquisition channel number m (step S3). The acquired channel number m is the number of acquired electrocardiographic waveforms selected by the diagnostician according to the body shape of the detected person, and is stored in the storage unit 322, for example. The electrocardiogram signal waveform is composed of a potential difference between the biological information detection signals from the two sensor electrodes (+ electrode and -electrode), and this is regarded as a one-channel electrocardiogram signal. Subsequently, the calculation unit 321 of the PC 32 sets the internal variable x to the initial value “1” (step S4).

  Thereafter, when one touch sensor in the touch sensor group 1220 is touched, the MCU 131 supplies a sensor position signal indicating the position of the touch sensor touched first to the analog switching circuit 132 as a switch control signal. A biological information detection signal from the sensor electrode corresponding to the touch sensor touched first from the sensor electrode group 1210 is supplied to the non-inverting input terminal of channel number x = 1 of the differential amplifier 133 (step S5). . At this time, the sensor electrode that supplies the biological information detection signal is a + electrode, and is referred to as “ch1 + electrode setting” in this specification.

  The sensor position signal indicating the position of the touch sensor touched first is transmitted from the MCU 131 to the wireless module 31 via the wireless module 14 and further supplied to the PC 32. Based on the input sensor position signal, the calculation unit 321 of the PC 32 changes the touch sensor at the position first touched from the touch sensor group 1220 displayed on the display unit 323 to other touch sensors that are not touched. Is displayed in a hue different from (step S6). For example, assuming that the touch sensor touched first is the touch sensor at the position of the second row and the second column shown by a in FIG. 4, the display area 41 of the touch sensor group in the display unit 323 is indicated by A. The touch sensor changes to a predetermined hue different from other touch sensors.

  Subsequently, when the diagnostician touches another touch sensor in the touch sensor group 1220, the MCU 131 supplies a sensor position signal indicating the position of the second touched touch sensor to the analog switching circuit 134 as a switch control signal. Then, the biological information detection signal from the sensor electrode corresponding to the touch sensor touched second in the sensor electrode group 1210 is supplied to the inverting input terminal of the differential amplifier 133 with the channel number x = 1 ( Step S7). At this time, the sensor electrode that supplies the biological information detection signal is a negative electrode, which is referred to as “ch1-electrode setting” in this specification.

  Further, the sensor position signal indicating the position of the second touched touch sensor is transmitted from the MCU 131 to the wireless module 31 via the wireless module 14 and further supplied to the PC 32. Based on the input sensor position signal, the calculation unit 321 of the PC 32 touches the touch sensor at the position touched secondly from the touch sensor group 1220 displayed on the display unit 323 and is not touched other than that. The sensor and the touch sensor touched first are displayed in different hues (step S8). For example, if the touch sensor touched second is the touch sensor at the position of the first row and the fourth column shown by b in FIG. 4, in the display area 41 of the touch sensor group in the display unit 323, The touch sensor shown changes to a predetermined hue different from other touch sensors.

  The differential amplifier 133 differentially amplifies the biological information detection signals from the two sensor electrodes (+ electrode and −electrode) input to the non-inverting input terminal and the inverting input terminal of the channel number x = 1 to obtain a reference voltage. A differential amplified signal as a reference is generated and supplied to the MCU 134 as an electrocardiographic signal of the first channel. The MCU 134 performs AD conversion on the supplied ECG signal of the first channel, and then supplies it to the wireless module 14, thereby transmitting it wirelessly to the wireless module 31. The calculation unit 321 of the PC 32 performs calculation processing suitable for display of the electrocardiogram signal data of the first channel received by the wireless module 31, and the first and second touch sensors touched on the display unit 323, respectively. The ECG signal waveform of one channel is displayed (step S9). Thus, for example, in the above example, as shown by 42 in FIG. 4, the display unit 323 displays the ECG signal waveform of the first channel between the touch sensors A and B touched first and second, respectively. Is called.

  Subsequently, the PC 32 determines whether or not the variable x is equal to the arbitrarily set acquisition channel number m (step S10). Assuming that the acquisition channel number m is “4” as an example, since x = 1 at this time, the calculation unit 321 determines x ≠ m in step S10, and sets the variable x to “1” from the current value. Only 2 is added (step S11), and the process returns to step S5 again. In step S <b> 5, the MCU 131 supplies a biological information detection signal from the sensor electrode corresponding to the touch sensor touched third in the sensor electrode group 1210 to the non-inverting input terminal of the channel number 2 of the differential amplifier 133. A sensor position signal indicating the position of the touch sensor touched third is supplied to the PC 32 via the wireless module 14 and the wireless module 31 together with (ch2 + electrode setting). As a result, the calculation unit 321 of the PC 32 touches the touch sensor at the third touched position from the touch sensor group 1220 displayed on the display unit 323 based on the input sensor position signal. The touch sensor that has not been touched and the touch sensor that has already been touched are displayed in different hues (step S6).

  Subsequently, the MCU 131 supplies the biological information detection signal from the sensor electrode corresponding to the touch sensor touched fourth in the sensor electrode group 1210 to the inverting input terminal of the channel number 2 of the differential amplifier 133 (ch2 -Electrode setting) (step S7), and simultaneously, a sensor position signal indicating the position of the touch sensor touched fourth is supplied to the PC 32 via the wireless module 14 and the wireless module 31. As a result, the calculation unit 321 of the PC 32 touches the touch sensor at the position touched fourth in the touch sensor group 1220 displayed on the display unit 323 based on the input sensor position signal. The touch sensor that has not been touched and the touch sensor that has already been touched are displayed in different hues (step S8).

  The differential amplifier 133 differentially amplifies the biological information detection signals from the two sensor electrodes (+ electrode and −electrode) input to the non-inverting input terminal and the inverting input terminal of the channel number 2 and uses the reference voltage as a reference. The differential amplified signal is generated and supplied to the MCU 134 as a second channel electrocardiogram signal. The MCU 134 performs AD conversion on the supplied ECG signal of the second channel and then supplies it to the wireless module 14 so that it is wirelessly transmitted to the wireless module 31. The calculation unit 321 of the PC 32 performs calculation processing suitable for display of the ECG signal data of the second channel received by the wireless module 31, and the first and second touch sensors touched on the display unit 323 third and fourth respectively. The 2-channel ECG signal waveform is displayed (step S9). Thus, for example, in the above example, as shown by 43 in FIG. 4, the display unit 323 displays the ECG signal waveform of the second channel between the touch sensors C and D touched in the third and fourth positions, respectively. Is called.

  Hereinafter, similarly, the operations of steps S10, S11, S5 to S9 are repeated twice, and the display of the ECG signal waveform of the third channel between the two touch sensors touched to the fifth and sixth, respectively, The display of the ECG signal waveform of the fourth channel between the two touch sensors touched in the seventh and eighth positions is sequentially performed. Since x = 4 at this time, the calculation unit 321 determines that the variable x and the acquisition channel number m are equal to “4” in the next step S10. As a result, the calculation unit 321 determines that ECG signals have been acquired and displayed for the number m of acquired channels, and a message such as “Are you sure you want to select the electrode?” Is displayed on the display unit 323 (not shown in FIG. 4). Is displayed (step S12).

When the diagnostician inputs “Yes” using the input unit 329 according to this display, the PC 32 switches the mode of the biological information measurement system 20 to the recording mode (step S13). On the other hand, when the diagnostician makes an input indicating “NO” with the input unit 329, the PC 32 returns to the process of step S4 and performs the process after the setting of the variable x in step S4 again. This is because even if ECG signal waveforms are obtained for the number of acquisition channels m, if there is a mistake in the touch operation of the touch sensor and you want to start again, or you want to restart the touch operation to obtain a more optimal ECG signal waveform Consider the case. Note that the input of “Yes” and “No” is not performed using the input unit 329, but an input button for determination may be displayed on a part of the screen of the display unit 323 so as to be selected. .

  By switching to the recording mode in step S13, an electrode selection mode setting process for acquiring an arbitrary number of channels of electrocardiographic signals between two sensor electrodes (+ electrode and −electrode) per channel of the biological information measurement system 20 Ends. In the recording mode, the biological information measuring system 20 transmits a recording mode signal from the PC 32 to the wireless module 14 via the wireless module 31. The wireless module 14 supplies the reception recording mode signal to the MCU 131 for the touch sensor. When the reception recording mode signal is supplied, the MCU 131 sets the analog switching circuit 132 in a selection disabled state (output prohibited state) of the biological information detection signal supplied from the sensor electrode group 1210 via the flexible wiring. Accordingly, in the recording mode, the electrocardiographic signal data of the number m of channels acquired in the immediately previous electrode selection mode and stored in the storage unit 332 is not changed regardless of whether or not the touch sensor of the touch sensor group 1220 is touched. Retained.

  Thus, according to the present embodiment, the diagnostician touches the body shape of the person to be detected from the plurality of touch sensors that constitute the touch sensor group 1220 of the arrayed bioelectric potential sensor 12 on the T-shirt 11. Since an electrocardiogram signal based on a biological information detection signal from a sensor electrode provided corresponding to the position of the selected touch sensor can be obtained by wireless communication only by selecting a touch sensor to be detected. Therefore, it is possible to easily and accurately detect and measure a desired electrocardiogram signal from a local detected position without worrying about the alignment of the sensor electrode due to the difference in body shape.

  In addition, according to the present embodiment, the electrocardiographic signal data based only on the biological information detection signal from the sensor electrode provided corresponding to the touch sensor selected from the plurality of touch sensors constituting the touch sensor group 1220. Wireless communication prevents useless ECG signal data from being communicated, and a small, inexpensive memory can be used as a memory for holding ECG signal data. Also, a battery with a small capacity can be used. Furthermore, power consumption can be reduced.

  In addition, this invention is not limited to the above embodiment, Various other modifications are included. For example, in the embodiment, the array-like biopotential sensor 12 is provided only on the front side of the T-shirt 11, but the array-like biopotential sensor is provided only on the rear side of the T-shirt 11 or on both the front side and the rear side. You may do it. In particular, when arrayed bioelectric potential sensors are provided on both the front side and the rear side of the T-shirt 11, an electrocardiographic signal waveform in a three-dimensional detection range can be obtained.

  In the embodiment, the array-like biopotential sensor 12 has been described as including 41 biopotential sensors 120 and one reference voltage sensor 129. However, the present invention is not limited to this, and the biopotential sensor is not limited thereto. There may be three or more sensor electrodes with a touch sensor such as 120. This is because an electrocardiographic signal of one channel is obtained by using two sensor electrodes as a positive electrode and a negative electrode, and when there are three sensor electrodes, two of them can be selected. Note that there is always one reference electrode sensor. Further, the planar shape of the touch sensor is not limited to a circle.

  Further, in this embodiment, the touch sensor touched in the touch sensor group 1220 is displayed on the display unit 323 by changing the hue from the touch sensor that is not touched, so that the position of the touch sensor touched is determined from the hue. In the embodiment, a light emitting diode (LED) is provided corresponding to the touch sensor and the sensor electrode in a one-to-one correspondence, and only the LED provided corresponding to the touch sensor touched is emitted. Instead of the configuration, it may be added. In the embodiment, an electrocardiogram signal is acquired. However, the present invention can also detect other biological information such as myoelectricity, respiratory rate, and body temperature. Further, in principle, communication between the signal processing unit and the monitor system can be performed by wired communication.

  The present invention can be expected to be widely applied to fields where flexible devices can be used, such as wearable sensors that detect biological information such as electrocardiogram, myoelectricity, respiratory rate, and body temperature for the purpose of monitoring human health.

DESCRIPTION OF SYMBOLS 10 Biological information detection sensor 11 T-shirt 12 Array-like bioelectric potential sensor 13 Signal processing part 14, 31 Wireless module 15 Battery 16, 161, 162 Flexible wiring 20 Biological information measurement system 30 Monitor system 32 Personal computer (PC)
41 Display areas 42 and 43 of touch sensor group ECG signal display waveform 50 Detected person 120 Biopotential sensor 121 Biopotential sensor electrode (sensor electrode)
122 Touch sensor 123 Protective film 131 MCU for touch sensor
132 Analog Switching Circuit 133 Differential Amplifier 134 ECG Signal MCU
323 PC Display Unit 330 PC Case 1210 Biopotential Sensor Electrode Group (Sensor Electrode Group)
1220 Touch sensor group

Claims (8)

An array-like biopotential sensor comprising three or more biopotential sensors arranged in an array on the textile worn by the subject;
The biopotential sensor is
A touch sensor provided on the surface of the textile;
The sensor electrode provided at the position of the back side of the textile corresponding to the position of the touch sensor,
Detecting biological information of the detected person based on a biological information detection signal from the sensor electrode of the bioelectric potential sensor arbitrarily selected from the three or more bioelectric potential sensors and touched by the touch sensor. A biological information detection sensor as a feature.   2. The biometric information detection sensor according to claim 1, wherein the arrayed bioelectric potential sensor is arranged on one or both of the front side and the rear side of the textile. The biological information detection signals output from the sensor electrodes of one biopotential sensor touched by the touch sensor from among the biological information detection signals from the sensor electrodes of three or more bioelectric potential sensors. Switching means to select;
Amplifying means for amplifying the biological information detection signal output from the switching means and outputting it as a biological information signal;
The biological information detection sensor according to claim 1, further comprising: provided in the textile. The switching means is output from the sensor electrodes of two different biopotential sensors touched by the touch sensor from among the biometric information detection signals from the sensor electrodes of three or more biopotential sensors. Select and output two biological information detection signals in sequence,
4. The biological information detection sensor according to claim 3, wherein the amplifying means outputs an amplified signal obtained by differentially amplifying the two biological information detection signals output from the switching means as the biological information signal. A biopotential sensor comprising a touch sensor provided on the surface of the textile worn by the person to be detected and a sensor electrode provided on the back surface of the textile corresponding to the arrangement position of the touch sensor is arrayed on the textile. An array of bioelectric potential sensors arranged in three or more,
The biometric information detection output from the sensor electrodes of the biopotential sensor touched by arbitrarily selecting the touch sensor from the biometric information detection signals from the sensor electrodes of the three or more biopotential sensors. Switching means for selecting a signal;
Amplifying means for amplifying the biological information detection signal output from the switching means and outputting it as a biological information signal;
Transmitting means for transmitting the biological information signal output from the amplifying means;
Receiving means for receiving the biological information signal transmitted by the transmitting means;
A biological information measurement system comprising: a calculation means for displaying a biological information measurement signal waveform of the detected person on a display unit based on the biological information signal received by the reception means. The switching means includes two detection signals output from the sensor electrodes of two different biopotential sensors touched by the touch sensor, from among the detection signals from the sensor electrodes of three or more biopotential sensors. A means for sequentially selecting and outputting biological information detection signals,
6. The living body according to claim 5, wherein the amplifying means is a differential amplifier that outputs an amplified signal obtained by differentially amplifying the two biological information detection signals output from the switching means as the biological information signal. Information measurement system. A position detection unit that outputs a sensor position signal indicating the position of the touch sensor touched among the three or more touch sensors of the bioelectric potential sensor;
The transmitting means transmits the sensor position signal; the receiving means receives the transmitted sensor position signal;
The arithmetic means provides a display area of a touch sensor group indicating the position of each touch sensor of the three or more bioelectric potential sensors constituting the array-shaped biopotential sensor on the display section, and is received by the receiving means. 7. The biological information measurement according to claim 6, wherein the position of the touch sensor touched is identified and displayed from among the touch sensors displayed in the display area of the touch sensor group based on the sensor position signal. system. The biological information measurement system according to claim 5, wherein the arrayed bioelectric potential sensor is arranged on one or both of the front side and the rear side of the textile.

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