JP2016043169A - Biological monitoring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a biological monitoring system which monitors the health condition of a human body to be cared.SOLUTION: A biological monitoring system comprises: a piezoelectric sensor 1 comprising plural sensor units; and biological signal notification means which separates a composite wave of the biological signals of the human body to be cared detected by the respective sensor units of the piezoelectric sensor into the respective biological signals, stores the separated biological signals in a storage unit 2 by each sensor unit, generates biological signal data for each sensor unit on the basis of the separated biological signals, and outputs the biological signal data to an output unit.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a biological monitoring system.

  In hospitals, nursing homes, and the like, it is necessary to sufficiently monitor the health status of patients or residents, and caregivers regularly check the status of patients or residents. Continually looking around a patient or caregiver requires a lot of effort for the caregiver, and a reduction in the caregiver's effort is required.

  In addition, the promotion of home medical care is being promoted in order to curb the rise in medical expenses, and how to manage the health status of patients who are being treated at home, especially elderly people living alone, is also a problem. Yes.

  Patent Document 1 discloses a home health management system in which an input device installed at the home of a health care contractor and a server installed at a contracted medical institution are connected via a communication line such as a public line, a dedicated line, or a CATV line. Data on daily physical condition complaints felt by the contractor are entered and transmitted as health management check data, monitored at the terminal of a medical institution, and stored as an individual database A home health management system has been proposed.

JP 2001-178688 A

  However, the above-mentioned home health management system requires that the patient inputs his / her health condition. If the patient fails to enter the health condition or if the patient makes an error in inputting the health condition, Have the problem of not being able to grasp a healthy state.

  The present invention automatically measures a biological signal of a care receiver at a plurality of locations, stores the measured biological signal in a storage unit, and a decoration determined based on a predetermined condition for the biological signal data By providing a signal to the output unit, a caregiver can easily grasp the health status of the cared body and provide a living body monitoring system that can respond smoothly to changes in the health status of the cared body To do.

  The biological monitoring system of the present invention separates a piezoelectric sensor having a plurality of sensor parts and a composite wave of a biological signal of a care receiver detected by each sensor part of the piezoelectric sensor into respective biological signals. The biosignal is stored in the storage unit for each sensor unit, and biosignal data is generated for each sensor unit based on the separated biosignal, and the biosignal data is subjected to a predetermined condition. And a biological signal notifying means for outputting a decoration signal determined based on the output signal to the output unit.

  In the biological monitoring system, the biological signal notifying means displays the arrangement state of the sensor part of the piezoelectric sensor as a map on the output part, and the biological signal data of each sensor part corresponds to the biological signal data on the map. It displays on the part which shows a part.

  In the living body monitoring system, the living body signal notifying means outputs the living body signal data to the output unit after giving a decoration signal to the living body signal data.

  In the biological monitoring system, the piezoelectric sensor is disposed on a bed.

  In the biological monitoring system described above, for each sensor unit of the piezoelectric sensor, one or a plurality of biological signals stored in the storage unit are divided in time series in units of unit time to form a unit of bed separation, and the latest bed unit The sum total of the outputs of the biological signals appearing in the section is the latest bed output total, and for each sensor part of the piezoelectric sensor, the new bed unit section is included next to the latest bed unit section and is continuous to the latest bed unit section. The sum of the outputs of the biological signals of one or a plurality of bed leaving units to be the past bed output total, and for each sensor unit, the latest bed output total is a value equal to or less than a predetermined ratio of the past bed output total. In all the sensor units, when the latest total bed output is equal to or less than a predetermined ratio of the past bed output total, a bed signal is transmitted to the output unit. And further comprising a lifting notification means.

  Since the living body monitoring system of the present invention has the above-described configuration, the living body monitoring system is selected based on the biological signal data of the care receiver measured by the plurality of sensor units of the piezoelectric sensor, and the decoration signal is output. The caregiver can easily grasp the health condition of the cared body, and the caregiver can appropriately care for the cared body.

  In the biological monitoring system, the biological signal notifying means displays the arrangement state of the sensor part of the piezoelectric sensor as a map on the output part, and the biological signal data of each sensor part corresponds to the biological signal data on the map. When displaying on the part indicating the part, the decoration signal selected based on the biological signal data corresponding to the sensor part is displayed on the display part of each sensor part in the map of the sensor part displayed on the output part. In addition, it is possible to recognize at a glance what biological signal is detected in which sensor part of the piezoelectric sensor, and the caregiver can perform care of the care receiver quickly and appropriately.

  In the biological monitoring system, when the biological signal data is output to the output unit after adding the decoration signal to the biological signal data, the biological signal data output to the output unit is provided with the decoration signal. The caregiver can easily recognize the state of the cared body by looking at the biosignal data, and the carer can quickly and appropriately care for the cared body.

  In the living body monitoring system, when it further has a bed leaving notification means, it quickly detects that a caregiver on the bed has left the bed, and quickly protects the cared body or provides care for the cared body quickly. Can do.

It is a figure which shows the hardware constitutions at the time of implement | achieving a biological monitoring system using CPU. It is the flowchart which showed operation | movement of the biosignal alerting | reporting program. It is the figure which showed the example of an output of the biomedical signal output to the output device. It is the figure which showed an example of the pulse wave table. It is the flowchart which showed operation | movement of the biosignal alerting | reporting program when calculating duration. It is the figure which showed the calculation point of the latest clock output total (latest bed output total) and the past clock output total (past bed output total). It is the image figure which showed an example of arrangement | positioning data of a sensor part. It is the figure which showed the example of a display of the biosignal data output to the output device. It is the figure which showed the example of an output of the biosignal data output to the output device. It is the figure which showed the example of an output of the biosignal data output to the output device. It is the flowchart which showed operation | movement of the bed leaving notification program.

  An example of the biological monitoring system A of the present invention will be described with reference to the drawings. The biological monitoring system A separates the synthesized wave of the biological signal of the care receiver detected by each sensor unit 11 of the piezoelectric sensor 1 having a plurality of sensor units 11 into each biological signal, The separated biological signal is stored in the storage unit for each sensor unit, and the biological signal data is generated for each sensor unit based on the separated biological signal, and predetermined for the biological signal data. Biological signal notifying means for outputting a decoration signal determined based on the condition to the output unit.

  The living body monitoring system A forms a bed leaving unit for each sensor unit of the piezoelectric sensor by dividing one or a plurality of biological signals stored in the storage unit in units of time in a time series. The sum of the outputs of the biological signals appearing in the unit section is set as the latest bed output total, and each piezoelectric sensor includes a new bed unit section next to the latest bed unit section and the latest bed unit section. The sum of the outputs of the biological signals of one or a plurality of consecutive bed leaving sections is defined as the past bed output total, and the latest bed output total is a value equal to or less than a predetermined ratio of the past bed output total for each sensor unit. In all sensor units, when the latest total bed output is equal to or less than a predetermined ratio of the past bed output total, It may further include a notification unit.

  FIG. 1 is a diagram showing a hardware configuration for realizing the biological monitoring system A. As shown in FIG. As shown in FIG. 1, a CPU (Central Processing Unit) 4 includes a storage device 2 such as an SSD (Solid State Drive) and an HDD (Hard Disk Drive) corresponding to a storage unit, a display and a speaker corresponding to an output unit. In addition, an output device 3 such as a printer, a ROM (Read Only Memory) 5, a RAM (Random Access Memory) 6, a measurement module 7, and an input device 8 are electrically connected. The piezoelectric sensor 1 is electrically connected to the measurement module 7. The electrical connection among the CPU 4, the storage device 2, the output device 3, the measurement module 7, the input device 8, and the piezoelectric sensor 10 may be wired or wireless, and may be via a LAN. Good.

  The measurement module 7 only needs to be able to measure the potential generated by the piezoelectric sensor 1, and a general-purpose electrometer can be used.

  In the present invention, the “care object” includes, in addition to the elderly, newborns, young people such as childcare, etc., including all persons who need care regardless of age, and pets. included.

  The piezoelectric sensor 1 has a plurality of sensor units 11. A well-known thing can be used for a sensor part. Specifically, each sensor unit 11 has a ground electrode laminated and integrated on one surface of a piezoelectric sheet, and a signal electrode stacked and integrated on the other surface of the piezoelectric sheet. Conductive wires are electrically connected to the ground electrode and the signal electrode of each sensor unit 11 independently of each other, and these conductive wires are electrically connected to the measurement module 7 independently of each other. The potential generated is measured by the measurement module 7.

  The piezoelectric sheet is not particularly limited as long as it is a sheet (sheet having a piezoelectric phenomenon) that can generate an electric charge on the surface when an external force is applied. As the piezoelectric sheet, a piezoelectric sheet obtained by imparting polarization to a synthetic resin sheet (synthetic resin foam sheet or synthetic resin non-foamed sheet) is preferable because it is highly sensitive and easily generates electric charges due to deformation in the thickness direction. A piezoelectric sheet having polarization imparted to the sheet is more preferable.

  The synthetic resin constituting the synthetic resin sheet is not particularly limited, and examples thereof include polyolefin resins such as polyethylene resins and polypropylene resins, polyvinylidene fluoride, polylactic acid, and liquid crystal resins, and polyolefin resins are preferable. Polypropylene resin is more preferable.

  The method for imparting polarization to the synthetic resin sheet is not particularly limited. For example, (1) a flat plate electrode sandwiched between a pair of flat plate electrodes and in contact with a surface to be charged is used as a high-voltage DC power source. Connecting and grounding the other plate electrode, applying a direct current or pulsed high voltage to the synthetic resin sheet to inject charges into the synthetic resin, and imparting polarization to the synthetic resin sheet, (2) electron beam, A method of imparting polarization to a synthetic resin sheet by irradiating the surface of the synthetic resin sheet with ionizing radiation such as X-rays or ultraviolet rays to ionize air molecules in the vicinity of the synthetic resin sheet; (3) a synthetic resin sheet; A first electrode having a grounded plate electrode in a close contact state, and a needle-like electrode electrically connected to a DC high-voltage power source with a predetermined interval on the second surface side of the synthetic resin sheet or Wire An electrode is installed, corona discharge is generated by electric field concentration near the tip of the needle electrode or near the surface of the wire electrode, and air molecules are ionized to repel air ions generated by the polarity of the needle electrode or wire electrode. And a method of imparting polarization to the synthetic resin.

  In the ROM 5, a control program executed by the CPU 4 and various data are stored. The RAM 6 stores a memory for temporarily storing setting values set based on various programs.

  Specifically, a biological signal notification program as a biological signal notification means is stored in the ROM 5. The biological signal notification means is realized by reading and writing data in the RAM 6 and the storage device 2 under the control of the CPU 4 by reading the biological signal notification program on the CPU 4 and the RAM 6.

  The piezoelectric sensor 1 is arranged on a bed or a seat surface of a chair used by the care receiver, and the care receiver is lying down, sitting down or standing on the piezoelectric sensor 1 and is emitted from the care receiver. The piezoelectric sheet of the piezoelectric sensor 1 is pressed and compressed and deformed by periodic vibration such as pulse and breathing or body movement of the care recipient, and a potential is generated in the piezoelectric sheet along with the compression and deformation. It changes with the vibration emitted from the care body. When the vibration generated from the care receiver is a periodic vibration such as a pulse or a breath, the potential generated in the piezoelectric sheet also changes periodically. As shown in FIG. 2, the biological signal notification program controls the measurement module 7 to acquire a change in potential over time generated in the piezoelectric sensor 1 as described above as a biological signal for each sensor unit ( Step 1 (S1)). The biological signal obtained from the measurement module 7 is generated by a plurality of vibrations such as a pulse, breathing, and body movement emitted from the care receiver, and becomes a composite wave of the plurality of biological signals. Therefore, the biological signal notification program generates a separated signal by separating a composite wave of a plurality of biological signals for each frequency by Fourier transform, and the separated signal is subjected to inverse Fourier transform for each biological signal (for example, pulse). Wave signal, respiratory signal, body motion signal, etc.) (step 2 (S2)). The biological signal obtained by the biological signal notification program separating each biological signal from the synthesized wave of the biological signal is as shown in FIG. 3, for example, where the vertical axis represents potential and the horizontal axis represents time. In the case of a pulse wave signal and a respiration signal, as shown in FIG. 3, the potential changes periodically with time. A person's pulse is 50-90 times per minute with a period of 0.6-3 Hz, and a person's breathing is 16-18 times per minute with a period of 0.1-1 Hz. Since the body movement is generally 10 Hz or higher, the biosignal notification program uses these as a guide and separates a composite wave of a plurality of biosignals into respective biosignals as described above.

  Then, the biological signal notification program stores the biological signal obtained by separating from the synthesized wave of the biological signal independently for each sensor unit 11 in the storage device 2 that is a storage unit, and converts the separated biological signal into the separated biological signal. Based on the biometric signal data generated for each sensor unit 11 based on the predetermined condition for the biomedical signal data and the arrangement of the sensor unit, which will be described later, to the caregiver's request In response or automatically, it is set to output to the output device 3 as an output unit (step 3 (S3)). The storage device 2 stores a pair of a potential generated by the piezoelectric sensor 1 and a time when the potential is measured as a biological signal so as to be independently readable for each biological signal. For example, when the biological signal is a pulse wave signal, the potential generated by the piezoelectric sensor 1 and the measurement time are paired and stored in the pulse wave table as shown in FIG. Each pulse wave table is distinguished by being attached with an identification number given to a sensor unit described later. When the biological signal is a respiration signal, the potential generated by the piezoelectric sensor 1 and the measurement time are paired and stored in the respiration table as in the case of the pulse wave. Each breathing table is distinguished by being attached with an identification number given to a sensor unit described later.

  Furthermore, the biological signal notification program generates biological signal data based on one or more biological signals. The obtained biological signal data is also attached with an identification number and is distinguished for each sensor unit. The biological signal data is not particularly limited as long as it is calculated based on the biological signal. Examples of the biological signal data include the number of biological signals per unit time, the average value of the number of past biological signals, and the duration. As the biological signal data, the potential generated by the piezoelectric sensor may be used as it is.

  For example, a case where a pulse wave number per unit time (pulse rate) is generated as the biological signal data will be described. The biological signal notification program accesses a pulse signal (pulse wave table) among the biological signals stored in the storage device 2. As described above, the storage device 2 stores the potential generated by the piezoelectric sensor 1 and the measurement time as a pair in the pulse wave table in time series.

  As described above, the pulse wave signal periodically changes when the vertical axis represents potential and the horizontal axis represents time. The biological signal notification program recognizes the pulse wave signal as a graph with the vertical axis representing potential and the horizontal axis representing time, and among the pulse wave signals stored in the pulse wave table in time series, the output unit time (for example, The latest pulse wave signal for 1 minute, 30 seconds, etc.) is extracted. Then, the number of periods included in the extracted pulse wave signal (the period from when the potential takes the maximum value from 0 to the minimum value after returning to 0 is counted as one period) is counted. Is the number of pulse waves per unit time. The number of pulse waves per unit time becomes the biological signal data.

  Furthermore, the biological signal data may be a pulse wave number per unit time in the past in addition to the latest pulse wave number per unit time. When generating such biological signal data, the biological signal notification program forms an output section by partitioning a pulse wave signal stored in the pulse wave table in time series from the new pulse wave signal for each output unit time. Then, the number of periods in the pulse wave signal included in each output section is counted, and the number of each period is defined as the number of pulse waves per unit time.

  In addition to the number of pulse waves per unit time, for example, when generating the respiration rate per unit time as biosignal data, the biosignal notification program accesses the respiration table, in the same manner as described above, What is necessary is just to produce | generate the respiration rate per unit time as biosignal data.

  For example, a case where an average value of the past pulse wave number (pulse rate) is generated as the biological signal data will be described. The biological signal notification program accesses a pulse signal (pulse wave table) among the biological signals stored in the storage device 2.

  The biological signal notification program calculates the total time when the pulse wave signal is measured based on the pulse wave signal stored in time series in the pulse wave table, and uses the pulse wave signal as the potential and the horizontal axis as the time. And counting the number of periods included in all pulse wave signals in the pulse wave table.

Based on the total time when the pulse wave signal is measured and the number of cycles included in all pulse wave signals in the pulse wave table, the biological signal notification program calculates the past pulse wave number based on Equation 1 below. The average value is calculated. The average value of the past pulse wave numbers becomes the biological signal data.
Average value of past pulse wave count = (output unit time) x (number of cycles included in all pulse wave signals in pulse wave table)
/ (Total time of measuring pulse wave signal)

  In addition to the average value of the past pulse wave number, for example, when generating the average value of the past respiratory rate as the biological signal data, the biological signal notification program accesses the breathing table and performs the same procedure as described above. Thus, an average value of past respiratory rates may be generated as the biological signal data.

  A case will be described in which duration time (time during which the care receiver is continuously present on the sensor unit) is generated as biological signal data. As shown in FIG. 5, the biological signal notification program is one or a plurality of biological signals (for example, pulses) obtained by separating the synthesized wave of the biological signal stored in the storage device 2 for each sensor unit 11. A wave signal, a respiratory signal, a body motion signal, etc.) are accessed (step 4 (S4)). In the following description, an operation for one sensor unit 11 of the piezoelectric sensor 1 will be described, but the biological signal notification program performs the same operation for all the sensor units 11.

  The biological signal notification program recognizes the accessed biological signal as the potential on the vertical axis and the time on the horizontal axis. Then, as shown in FIG. 6, the biological signal notification program divides each accessed biological signal in order from the newest one in time units (for example, 1 minute, 30 seconds, etc.). A section T (T1, T2, T3, T4...) Is formed (step 5 (S5)). Note that the number of time unit partitions to be formed is set in correspondence with the number of time unit partitions used for the past clock output summation described later.

  The biological signal notification program calculates the sum of the outputs of the biological signals appearing in the latest timing unit section T1 for each biological signal, calculates the sum of the total outputs of the respective biological signals, and calculates this sum as the latest time count. Output total. Furthermore, the biological signal notification program includes, for each biological signal, one or a plurality of timing unit sections T2, T3 including a new timing unit section T2 next to the latest timing unit section T1 and continuing to the latest timing unit section T1. , T4,..., T4... Are calculated, and the sum of the outputs of the respective biosignals is calculated, and this sum is set as the past timekeeping output sum (step 6). (S6)). The number of timing unit sections targeted for calculating the past timing output total is not particularly limited, but is preferably 1 to 10, and more preferably 1 to 5. The biological signal notification program determines whether or not the number of timing unit sections has reached the number that can calculate the past timing output total, and the number of timing unit sections is the number that can calculate the past timing output total. If it has reached, the process proceeds to step 6, and if the number of timing unit sections has not reached the number capable of calculating the past timing output total, the process returns to step 4 (step 6-1 (S 6-1). )).

  The biological signal changes up and down around a potential of 0 mV, when the horizontal axis represents time and the vertical axis represents potential. In the present invention, the “total output of biological signals” means “the total area of the portion surrounded by the curve B drawn by the biological signal and the reference straight line C indicating the potential of 0 mV” (the area of the hatched portion in FIG. 6). means.

  The biological signal notification program compares the latest timed output total with the past timed output total, and determines whether or not the latest timed output total exceeds a predetermined ratio of the past timed output total ( Step 7 (S7)), when the latest total timed output total exceeds a predetermined ratio of the past total timed output total, the care receiver is placed on the target sensor unit 11. Existing. On the other hand, if the latest total timed output total is a value equal to or less than a predetermined ratio of the past total timed output total, it is determined that the care receiver does not exist on the target sensor unit. The biological signal notification program returns to step 4. The predetermined ratio of the past timekeeping output sum may be set as appropriate in consideration of the age, sex, etc. of the care recipient, for example, 1/10 or 1/5 of the past timekeeping output sum. .

  The biological signal notification program updates the latest timing unit section T2 next to the latest timing unit section T1 when the latest total timing output sum exceeds the predetermined ratio of the past timing output total. In step 8 (S8), it is determined whether or not the retroactive past output sum can be calculated in the same manner as the calculation of the past timekeeping output sum. If the total retroactive clock output cannot be calculated, the process proceeds to step 11 (S11), and the measurement time of the oldest biological signal among the biological signals constituting one new timing unit section T1 is set as the timing start time. . On the other hand, when the retroactive clock output total can be calculated, the retroactive clock output total and the retroactive clock output total are calculated by regarding the clocking unit section T2 as the latest clocking unit block (step 9 (S9)).

  The biological signal notification program compares the retroactive clock output total with the retroactive clock output total, and determines whether the retroactive clock output sum exceeds a predetermined percentage of the retroactive clock output total. (Step 10 (S10)), when the retroactive clock output total is a value exceeding a predetermined ratio of the retroactive past time output total, the care target is the target sensor unit. 11 is determined to exist, and the process returns to step 8. On the other hand, when the retroactive clock output total is a value equal to or less than a predetermined ratio of the retroactive past total output, the care receiver does not exist on the target sensor unit 11. to decide. Then, the measurement time of the oldest biological signal among the biological signals constituting the timing unit section T1 that is one newer than the timing unit section T2 for which the retroactive timing output total is calculated is set as the timing start time ( Step 11 (S11)). Steps 8 to 10 are repeated until the timing start time is specified.

  Next, the biological signal notification program creates a timing unit section in the same manner as in step 5 (step 12 (S12)), and calculates the latest timing output sum and the past timing output sum in the same manner as in step 6 ( Step 13 (S13)).

  Then, the biological signal notification program compares the latest clocked output total with the past clocked output total in the same manner as in Step 7, and the latest clocked output total exceeds the predetermined ratio of the past clocked output total. (Step 14 (S14)), and if the latest timed output total is a value that exceeds a predetermined ratio of the past timed output total, It is determined that it exists on the target sensor unit 11. The biological signal notification program sets the measurement date and time of the newest biological signal among the biological signals constituting the timing unit section that is the target of calculation of the latest total timed output sum as the latest duration time (step 15 (S15)). ). Next, the biological signal notification program calculates an elapsed time from the timing start time based on the timing start time and the latest duration time, and sets this elapsed time as the duration (step 16 (S16)).

  Subsequently, the biological signal notification program returns to step 12, repeats the operation from step 12, and updates the duration.

  On the other hand, the biological signal notification program compares the latest timekeeping output sum with the past timekeeping output sum in the same manner as in Step 7, and the latest timekeeping output sum exceeds the predetermined ratio of the past timekeeping output sum. (Step 29 (S29)), and when the latest total clock output total is a value equal to or less than a predetermined ratio of the past total clock output, It is determined that the sensor unit 11 does not exist.

  Then, the biological signal notification program stops updating the duration time, resets the duration time to 0 seconds (step 17 (S17)), returns to step 4, and repeats the above operation.

  As described above, the biological signal notification program calculates the duration for each sensor unit 11, and the identification number of the target sensor unit is given to the duration, and the duration is distinguished for each sensor unit. The

  Then, the biological signal notification program outputs a decoration signal determined based on a predetermined condition for the biological signal data generated based on the biological signal to the output device 3 at the request of the caregiver or automatically. To do. The output format of the biological signal to the output device 3 is not particularly limited, and examples thereof include display on a display and printing on a printer.

  The decoration signal output to the output device 3 is determined based on a predetermined condition for the biological signal data, and is determined based on the value of the biological signal data.

  When it is determined from the value of the vital sign data that there is a possibility that an abnormality has occurred in the health status of the care recipient, it is easy for the caregiver to have an abnormality in the health status of the care recipient. A decorative signal recognizable to the user is output to the output device. As a decoration signal, for example, a decoration signal having a red color for recognizing danger in characters and lines displayed on the output device (for example, characters or numbers for displaying the biological signal data or its type) is used for the output device. Examples include a decoration signal in which the background of the display section to be described later is a red color, a decoration signal that displays a character that recognizes danger (for example, a doctor's character with a crying face), and a voice that recognizes danger.

  On the other hand, if it is determined from the value of the biological signal data that there is no possibility that the health condition of the care receiver is abnormal, it is easy for the bio signal to have no problem with the health condition of the care receiver. A recognizable decoration signal is given to As a decoration signal, for example, a decoration with a blue or green color for recognizing safety or security of characters and lines displayed on the output device (for example, characters or numbers for displaying biological signal data or its type) is used. Signals, decorative signals with a blue or green color in the background of the display area described later displayed on the output device, decorative signals that display safety or safety recognition characters (for example, smiling doctor characters), safety Or, a voice for recognizing peace of mind.

  For example, when the biological signal data is a pulse wave number per unit time (one minute) and the care receiver is an adult, the general pulse wave (pulse) number per minute is 50 to 100 times. When the pulse wave number per unit time is in the range of 50 to 100 times, when the decoration signal is output to the output device 3, a display or number indicating the pulse wave number per unit time is displayed in blue or green. Or a background color of a display section, which will be described later, displayed on the output device, or a character that recognizes safety or security. On the other hand, when the pulse wave number per unit time is less than 49 times or 101 times or more, when outputting the decoration signal to the output device 3, the display or number indicating the pulse wave number per unit time is set to a red color. Or a background color of a display section, which will be described later, displayed on the output device, a character that recognizes danger, or a decoration signal composed of a sound that recognizes danger. In addition, when outputting sound, it is difficult to distinguish which sensor unit the sound is from, so at the same time, the display or number indicating the pulse wave number per unit time is made red color or dangerous. It is preferable to output a character that recognizes.

  Further, the duration time indicates the time during which the care receiver is continuously present on the target sensor unit. Therefore, for example, depending on the care object, it can be inferred from the duration that it is continuously sleeping on the bed, and if the duration is longer than necessary in some sensor units, It can be assumed that the sleeping state is longer than necessary, and it is possible to suspect that a health abnormality has occurred in the care recipient. In addition, depending on the body to be cared, it is necessary to go to the toilet every certain time, and if the duration time is longer than necessary in some sensor units, the cared body has gone to the toilet once within the certain time. I can guess that there is no.

  Therefore, for example, when the duration time is longer than a predetermined time (for example, 3 hours, 5 hours, etc.), the biosignal notification program requires that the caregiver needs care of the care recipient. A decorative signal that can be easily recognized is output to the output device 3. As the decoration signal, for example, a decoration signal having a red color for recognizing danger as a character and a line indicating a duration, a decoration signal having a red background as a background of a display section displayed on the output device, The decoration signal which displays the character (for example, doctor character of a crying face) which recognizes danger, the decoration signal which consists of the sound which recognizes danger, etc. are mentioned. In addition, when outputting sound, it is difficult to distinguish which sensor unit the sound is from, so at the same time, the display or number indicating the pulse wave number per unit time is made red color or dangerous. It is preferable to output a character that recognizes.

  On the other hand, when the duration time is a predetermined time or shorter than this time, the biological signal notification program outputs a decoration signal that can easily recognize that the caregiver does not need care of the care recipient. Output to. Examples of the decoration signal include a decoration signal having a blue or green color for recognizing safety or security of characters and lines indicating the duration, and a background of a display section, which will be described later, displayed on the output device is blue or green. The decoration signal which displays the color of a system, the decoration signal which displays the character (for example, the character of a smiling doctor) which recognizes safety or relief, etc. are mentioned.

  The storage device 3 stores arrangement data of the sensor unit 11 of the piezoelectric sensor 1. The arrangement data includes arrangement information indicating how the sensor units are arranged and an identification number of each sensor unit. Arrangement information includes, for example, a grid pattern, a houndstooth pattern, and the like. An identification number is assigned to each sensor unit 11, and each sensor unit 11 can be specified by the identification number. For example, as shown in FIG. 7, when the sensor unit 11 of the piezoelectric sensor 1 is arranged in a grid pattern, the total number of rows and the total number of columns of the sensor unit are stored, and the row and column are specified. Each sensor unit is specified by. In FIG. 7, for example, the identification number of the sensor unit arranged in the leftmost column and the uppermost row is S11, and the identification number of the sensor unit on the right side is S12, S13, S14. S1n, the identification number of the sensor unit arranged in the lower row of S11 is S21, the identification number of the sensor unit on the right side is S22, S23, S24 ... S1n in order, and so on. By assigning numbers S11 to Smn, each sensor unit can be specified.

  The biological signal notification program accesses the arrangement data stored in the storage device 3 to recognize the arrangement state of the sensor unit 11 of the piezoelectric sensor 1 based on the arrangement information, and causes the output unit 3 to detect the sensor unit. 11 arrangement states are displayed as a map. For example, when the sensor units 11 are arranged in a grid pattern, as shown in FIG. 8, the display sections D (for example, quadrangular shapes, etc.) that mean each sensor unit are arranged in a grid pattern. It is displayed on the display. Each display section D is associated with an identification number assigned to each sensor section 11, and each display section D and each sensor section 11 correspond one-to-one. That is, the biological signal notification program attaches the identification number of the sensor unit 11 to the display section D, and adds an identification symbol such as D-S11, D-S12... D-Smn to each display section D. The display section D and the sensor unit 11 are made to correspond one to one. In FIG. 8, the identification symbol of the display section D is a symbol that causes the biological signal notification program to recognize the display section in association with the sensor section, and is not displayed on the output section.

  The biological signal notification program is based on a predetermined condition for biological signal data having the same identification number as the identification number of the sensor unit in the identification symbol assigned to the display section D. The decoration signal is output to the output device 3 so that the defined decoration signal is displayed. In addition, you may output biosignal data to the output device 3 with a decoration signal. When the decoration signal is output to the output device 3 together with the biological signal data, the decoration signal and the biological signal data may be output to the output device 3 in a form in which the decoration signal is added to the biological signal data. Giving a decoration signal to the biological signal data includes, for example, setting a number or character indicating the biological signal data to a predetermined color, displaying a predetermined character together with the number or character indicating the biological signal data, and the like. . In the output device 3, the sensor unit 11 is displayed in the display section D to display the arrangement state of the sensor section 11, and the decoration signal measured by the corresponding sensor section 11 is displayed in each display section D. If necessary, it is displayed together with biosignal data. FIG. 8 shows a case where the biological signal data is output to the output device 3 together with the decoration signal. As the biological signal data, for example, the number of pulse waves per minute, the number of breaths per minute, the duration, and the potential of the pulse wave signal are displayed. In this way, the output device 3 can confirm at a glance how large or how many biological signals are detected in the sensor unit disposed in which part. For example, when the respiratory signal data is displayed as the biological signal data in the display section, it is estimated that the lung of the care target is located in the display section where the respiratory signal data having the highest potential is displayed. The posture of the care receiver can be estimated by taking into account the values of the respiratory signal data displayed in other display sections. When the biological signal data is not output to the output device 3, for example, in FIG. 8, a character string indicating the type of the biological signal data (eg, “pulse wave number”, “respiration rate”, etc.) is displayed in a predetermined color. That's fine.

  When the biological signal notification program outputs the biological signal data to the output device 3, the display method on the output device 3 may be appropriately changed according to the type of the biological signal data. For example, when displaying the current pulse wave number per unit time, as shown in FIG. 9, a display method for displaying the pulse wave number per unit time like a pie chart, as shown in FIG. There are a display method for displaying the number of pulse waves per time as a band graph, a display method for displaying the number of pulse waves per unit time as a number, and the like.

  The biological signal notification program outputs the arrangement state of the sensor unit and the biological signal data to the output device 3, but the arrangement state of the sensor unit, the decoration signal, and the biological signal data are output to the output device 3 by the biological signal notification program. May be performed when there is a request from the caregiver through the input device 8 such as a keyboard or a liquid crystal touch panel electrically connected to the CPU, or regardless of whether there is a request from the caregiver. It may be automatically performed at predetermined intervals (for example, 1 second, 30 seconds, 1 minute, etc.).

  When there is a request from the caregiver, the biosignal notification program is set to output the sensor unit arrangement state and the biosignal data to the output device. The biosignal data may be generated by the above operation at the time of occurrence, or the biosignal data is automatically generated at predetermined intervals by the above operation regardless of the request from the caregiver. The biosignal data thus stored may be temporarily stored in the RAM 6 or the storage device 2, and the biosignal data stored temporarily may be used when a request is received from a caregiver.

  In addition, the biological monitoring system A forms a bed separation unit for each sensor unit 11 of the piezoelectric sensor 1 by dividing one or a plurality of biological signals stored in the storage unit in units of unit time in time series, The sum total of the outputs of the biological signals appearing in the latest bed leaving unit section is set as the latest bed leaving output total, and each sensor unit 11 of the piezoelectric sensor 1 includes the new bed leaving unit section next to the latest bed leaving unit section and the latest. The sum of the outputs of the biological signals of one or a plurality of bed leaving units continuous to the bed leaving unit is defined as the past bed output total, and for each sensor unit, the latest bed output total is a predetermined ratio of the past bed output total. Judgment is made whether or not the following value is reached, and a signal for getting out of bed is transmitted to the output unit when the latest bed output total becomes a value equal to or less than a predetermined ratio of the past bed output total in all sensor units. It may further have a bed leaving notification means.

  The ROM 5 stores a bed leaving notification program as a bed leaving notification means. The getting-off notification means is realized by reading and writing data in the RAM 6 and the storage device 2 under the control of the CPU 4 by reading the getting-off notification program on the CPU 4 and the RAM 6.

  The bed leaving notification program is executed when the piezoelectric sensor 1 is disposed on the bed used by the care receiver. The bed leaving notification program is executed by inputting an execution command by a caregiver from an input device 8 (keyboard, liquid crystal touch panel, etc.) connected to the CPU 4.

  As shown in FIG. 11, the bed leaving notification program is one or a plurality of biological signals (for example, pulse wave signals) obtained by separating the composite wave of the biological signals stored in the storage device 2 by the biological signal notification program. , Breathing signal, body motion signal, etc.) (step 18 (S18)). The bed leaving notification program accesses one or a plurality of biological signals for all the sensor units 11 and performs the operation from step 18 to step 21 described later independently for each sensor unit.

  The bed leaving notification program recognizes the accessed biological signal as the potential on the vertical axis and the time on the horizontal axis. Then, as shown in FIG. 6, the bed leaving notification program divides each of the accessed biological signals in order from the newest one in time for each unit time (for example, 1 minute, 30 seconds). T (T1, T2, T3, T4...) Is formed (step 19 (S19)). The number of bed leaving unit sections to be formed is set corresponding to the number of bed leaving unit sections used for the past bed leaving output summation described later.

  The bed leaving notification program calculates the sum of the outputs of the biological signals that appear in the latest bed unit section T1 for each biological signal, calculates the sum of the outputs of each biological signal, and outputs this sum as the latest bed output. Sum. Further, the bed leaving notification program includes, for each biological signal, one or more bed unit sections T2, T3 including a new bed unit section T2 next to the latest bed unit section T1 and continuing to the latest bed unit section T1. The sum total of the outputs of the biological signals appearing in the bed leaving unit section including T4... Is calculated, and the total sum of the outputs of the respective biological signals is calculated, and this sum is set as the past bed output total (Step 20 ( S20)). The number of bed leaving unit sections targeted for calculating the past bed leaving output total is not particularly limited, but is preferably 1 to 100, and more preferably 1 to 50.

  The bed leaving notification program compares the latest bed output total with the past bed output total, and determines whether or not the latest bed output total is equal to or less than a predetermined ratio of the past bed output total (step 21). (S21)).

  When the latest bed output total is a value exceeding a predetermined ratio of the past bed output total, it is determined that the care receiver is on the bed, and the process returns to step 18 to repeat the above operation.

  On the other hand, when the latest total bed output is equal to or less than a predetermined ratio of the past total bed output, the latest total bed output and the total previous bed output are also calculated for all other sensor units 11. In comparison, it is determined whether or not the latest bed output total is a value equal to or less than a predetermined ratio of the past bed output total (step 22 (S22)).

  And for all other sensor units 11, the latest total bed output is a value equal to or less than a predetermined ratio of the past total bed output, and the latest total bed output is the past in all sensor units 11. When the value is equal to or less than a predetermined ratio of the total bed output, it is determined that the cared body may have left the floor, and this determination is transmitted to the output device 3 as a bed signal (step 23 ( S23)).

  On the other hand, as a result of comparing the latest total bed output and the total previous bed output for all the other sensor units 11, the latest total bed output is not less than a predetermined ratio of the total previous bed output. If the part 11 is present, it is determined that the care receiver is in bed, and the process returns to step 18 to repeat the above operation.

  The method of outputting the bed leaving signal to the output device 3 is not particularly limited, and examples thereof include displaying an image and / or characters indicating that the floor has been left on the display, and generating a sound that indicates the possibility of getting out of the floor from the speaker. It is done. The predetermined ratio of the past bed output total may be set as appropriate in consideration of the age, sex, etc. of the cared person, for example, 1/10, 1/5, etc. of the past bed output total. . When the latest total bed output is equal to or less than a predetermined ratio of the past bed output total, the bed signal is transmitted from the body to be cared for at the potential measured by the piezoelectric sensor 1. This is because a potential due to noise having a movement similar to biological vibration is included. Therefore, in all the sensor units 11, when the latest total bed output is equal to or less than a predetermined ratio of the past bed output total, the bed notification program determines that the body to be cared has left the bed, A bed leaving signal reporting that the body may have left the floor is output to the output device 3. The bed leaving notification program outputs the bed leaving signal to the output device 3 and then returns to step 18 to repeat the above operation.

  When the caregiver confirms the getting-off signal output to the output device 3, the caregiver can immediately go to the body to be cared and immediately confirm the presence or absence of the cared body.

DESCRIPTION OF SYMBOLS 1 Piezoelectric sensor 2 Memory | storage device 3 Output device 7 Measurement module 8 Input device A Living body monitoring system

Claims (5)

A piezoelectric sensor having a plurality of sensor units and a synthesized wave of a biological signal of a care receiver detected by each sensor unit of the piezoelectric sensor are separated into respective biological signals, and the separated biological signal is separated for each sensor unit. And storing biometric signal data for each of the sensor units based on the separated biological signal, and a decoration signal determined based on a predetermined condition for the biological signal data. A biological monitoring system comprising biological signal notification means for outputting to an output unit. The biological signal notifying means displays the arrangement state of the sensor part of the piezoelectric sensor as a map on the output part, and displays the biological signal data of each sensor part on the part indicating the sensor part corresponding to the biological signal data on the map. The living body monitoring system according to claim 1. The biological monitoring system according to claim 1 or 2, wherein the biological signal notification means outputs the biological signal data to an output unit after giving a decoration signal to the biological signal data. The living body monitoring system according to any one of claims 1 to 3, wherein the piezoelectric sensor is disposed on a bed. For each sensor unit of the piezoelectric sensor, one or a plurality of biological signals stored in the storage unit are divided in time-series units for each unit time to form a bed unit unit, and the biological signal that appears in the latest bed unit unit The total sum of outputs is the latest total bed output, and for each sensor part of the piezoelectric sensor, one or a plurality of beds including the new bed unit section next to the latest bed unit section and continuing to the latest bed unit section. The total output of the biological signals of the unit sections is defined as the past bed output total, and for each sensor unit, it is determined whether or not the latest bed output total is equal to or less than a predetermined ratio of the past bed output total. In all the sensor units, there is further provided a bed leaving notification means for transmitting a bed leaving signal to the output unit when the latest bed output total becomes a value equal to or less than a predetermined ratio of the past bed output total. Biological monitoring system according to claim 4, characterized.

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