Biological information measurement system, biological information measurement method, and biological information measurement program

Abstract

We can provide an inexpensive biometric information measurement system that can easily measure weight changes while the subject remains lying in bed. [Solution] The system comprises a flexible sheet body 21 and load sensor units 22 provided at multiple locations on the sheet body, with a sheet sensor 20 that outputs load information detected by each load sensor unit 22; a reclining state information detection means 30 that detects the posture of the bed 10 and / or the body position of person P on the bed and outputs reclining state information as a result of the detection; a determination unit 411 that determines whether the value of the reclining state information is within a predetermined reference range; a weight change calculation unit 412 that, if the value of the reclining state information is within a predetermined reference range, calculates weight change information indicating the change in the weight of person P based on the change in load information over time output from the sheet sensor 20 placed between the bed 10 and person P; and a weight change information storage unit 413 that stores the weight change information.

Description

[Technical Field]

[0001] This invention relates to a biological information measurement system. [Background technology]

[0002] Weight change is an important indicator for managing patients' cardiac disease and assessing their nutritional status. Especially in home healthcare settings, the management of weight change, a readily obtainable indicator, is expected to become increasingly important in the future.

[0003] Currently, the weight of patients who have difficulty living independently is measured by having caregivers hold the patient and step onto a scale, which places a significant burden on the caregiver. To alleviate this burden on caregivers, it would be desirable to be able to measure the patient's weight without the caregiver's support.

[0004] Conventionally, a weighing scale that measures the weight of patients who have difficulty standing on their own, without the support of a caregiver, has been considered, for example, a plate-shaped device like the one shown in Patent Document 1. According to Patent Document 1, this weighing scale has many weight-detecting transducers installed on a plate-shaped patient transfer platform, and it is described that it can measure the weight of a patient lying on their back on the plate.

[0005] In addition, a hanging type of scale is being considered for measuring the weight of patients who have difficulty standing on their own, without the support of a caregiver. A hanging type scale measures the weight by suspending the stretcher on which the patient lies.

[0006] However, while these scales do not require the patient to be supported during measurement, the caregiver's support is still needed when transferring the patient onto the scale. Furthermore, all of these scales are large and expensive.

[0007] On the other hand, a weighing scale that does not require the patient to be transferred has been proposed, which is installed under the legs of the bed. This scale measures the weight of a patient while they are lying in bed by pre-installing load cells equipped with load sensors under each of the bed's legs.

[0008] However, this weighing scale is also expensive. Furthermore, the load cell of this weighing scale must be mounted on a rigid surface. [Prior art documents] [Patent Documents]

[0009] [Patent Document 1] Utility Model Registration No. 3227018 [Overview of the project] [Problems that the invention aims to solve]

[0010] This invention has been made in view of the above-mentioned problems, and its main objective is to provide an inexpensive biological information measurement system that can easily measure weight changes while the subject is lying in bed. [Means for solving the problem]

[0011] In other words, the biological information measurement system according to the present invention is as follows:

[0012] [1] A biometric information measurement system for measuring the biometric information of a person lying on a bed, A sheet sensor comprising a flexible sheet body and load sensor units provided at multiple locations on the sheet body, which outputs load information detected by each load sensor unit, A recumbent position information detection means detects the posture of the bed and / or the body position of the person on the bed, and outputs recumbent position information as a result of the detection; A determination unit that determines whether the value of the aforementioned recumbent state information is within a predetermined reference range, If the value of the reclining position information is within the reference range, a weight change calculation unit calculates weight change information indicating the change in the person's weight based on the change in the load information output from the sheet sensor placed between the bed and the person over time. A biological information measurement system characterized by comprising a weight change information storage unit for storing the aforementioned weight change information.

[0013] With such a biometric information measurement system, caregivers can adjust the bed position and / or the subject's position to a predetermined position and / or body position in order to determine whether the information regarding the lying-down position falls within a predetermined standard range. As a result, the bed position and / or the subject's position will be the same or similar for each measurement, ensuring consistent measurement conditions and allowing for accurate measurement of weight change information. Furthermore, because this biometric information measurement system measures weight change information rather than weight, it can calculate weight change information from the relative value of load information obtained from a sheet sensor, for example, by using past load information as a reference. This eliminates the need for load sensors that can measure the absolute value of load with high precision, allowing it to be provided at a low cost. Moreover, because it can store weight change information, it can accumulate information necessary for managing a patient's health, and can be used, for example, as an indicator for doctors to assess a patient's health status during medical examinations. In addition, because the sheet sensor of this biometric information measurement system is a flexible sheet, it can be used, for example, by placing it under a bed mattress. This eliminates the need for a hard floor or a large open space for installation, allowing for seamless integration into the subject's living environment. For example, weight changes can be measured while the subject remains lying in their usual bed, eliminating the need for caregivers to lift or transfer the subject for weight measurement. This reduces the burden on caregivers and, as a result, improves the quality of other care. Furthermore, since this biometric information measurement system can be used, for example, by placing it under a mattress, it does not need to support heavy objects such as a bed frame, making it easier to create a durable sheet sensor and allowing for inexpensive manufacturing.

[0014] [2] further comprising a calibration mode, when said calibration mode is selected, said body weight change calculation unit compares an actual weight obtained by measuring said person with a weight scale and said corresponding load information, and acquires comparison information that is a result of said comparison, The biological information measurement system according to [1], wherein said load information is calibrated based on said comparison information.

[0015] With this configuration, the load information is calibrated based on the comparison information between the load information and the actual weight, so the load information can be acquired with higher accuracy. As a result, weight change information necessary for health management of a patient can be calculated more accurately.

[0016] [3] A biological information measurement method for measuring biological information of a person lying on a bed, using: a sheet sensor that outputs load information detected by respective load sensor units respectively provided at a plurality of positions of a flexible sheet body; and a recumbent state detection means that detects a posture of the bed and / or a body position of the person on the bed and outputs recumbent state information that is a detection result of the detection, the method comprising: determining whether a value of said recumbent state information is within a predetermined reference range, if the value of said recumbent state information is within a predetermined reference range, calculating weight change information indicating a weight change of the person based on a temporal change of said load information output from a sheet sensor laid between the bed and the person, The method uses the biological information measurement method characterized by storing said weight change information.

[0017] [4] A program applied to a biological information measurement system that measures biological information of a person lying on a bed, wherein the biological information measurement system of the present invention comprises: a sheet sensor that outputs load information detected by respective load sensor units respectively provided at a plurality of positions of a flexible sheet body; and a recumbent state detection means that detects a posture of the bed and / or a body position of the person on the bed and outputs recumbent state information that is a detection result of the detection, a determination unit configured to determine whether the value of said recumbent state information falls within a predetermined reference range; a body weight change calculation unit configured to, if the value of said recumbent state information falls within a predetermined reference range, calculate body weight change information indicating a change in the body weight of the person based on temporal changes in said load information output from said sheet sensor laid between said bed and the person; The present invention uses a biological information measurement program that causes a computer to exert a function as a body weight change information storage unit that stores said body weight change information.

[0018] [5] A biological information measurement system for measuring biological information of a person lying on a bed, comprising: a sheet sensor comprising a flexible sheet body and load sensor units respectively provided at a plurality of positions of the sheet body, wherein the sheet sensor outputs load information detected by each load sensor unit; recumbent state information detection means configured to detect the posture of said bed and / or the body position of the person on the bed, and output recumbent state information as the detection result; a body weight change calculation unit configured to calculate body weight change information indicating a change in the person's body weight by temporally comparing said load information output from said sheet sensor laid between said bed and the person and said recumbent state information; The system is characterized by comprising a body weight change information storage unit that stores said body weight change information.

[0019] With this configuration, body weight change information of a subject is calculated by associating recumbent state information with load information and comparing them over time. For example, body weight change information can be calculated by comparison with past load information associated with recumbent state information that is the same or similar to that at the time of measurement, so measurement can be performed regardless of the posture of the bed and / or the body position of the subject. Furthermore, as mentioned above, this biometric information measurement system measures weight change information rather than weight. For example, it can calculate weight change information from the relative value of load information obtained from the sheet sensor, using past load information as a reference. This eliminates the need for load sensors that can measure absolute load values ​​with high precision, allowing it to be provided at a low cost. Moreover, because it can store weight change information, it can accumulate information necessary for managing the patient's health, and can be used as an indicator for doctors to assess the patient's health status, for example, during medical examinations. In addition, because this sheet sensor is a flexible sheet, it can be used, for example, by placing it under a bed mattress. This eliminates the need for a hard floor or a large space for installation, allowing it to be easily integrated into the living environment of the person being measured. For example, weight change can be measured while the person is lying on their usual bed, eliminating the need for caregivers to lift or transfer the person being measured, reducing the burden on caregivers and ultimately improving the quality of other care. Furthermore, because this biometric information measurement system can be used by placing the sheet sensor under a mattress, for example, it does not require supporting heavy objects such as a bed frame, making it easier to manufacture a durable sheet sensor and provide it at a low cost.

[0020] [6] Further equipped with calibration mode, When the aforementioned calibration mode is selected, The weight change calculation unit compares the actual weight obtained by measuring the person's weight with the load information and the lying-down position information at that time, and obtains comparison information which is the result of the comparison. A biological information measurement system according to [5], characterized in that it calibrates the load information based on the comparative information.

[0021] With this system, the load information is calibrated based on a comparison with actual body weight and supine position information, allowing for accurate acquisition of load information. As a result, weight change information necessary for patient health management can be calculated more accurately.

[0022] [7] The bio-information measurement system according to [5] or [6], characterized in that the weight change calculation unit calculates the weight change information based on a learning model constructed using the actual weight and the change values ​​of the load information and the lying-down state information at that time as training data.

[0023] With such a system, for example, by using a learning model such as AI, it would be possible to build this system more easily while also ensuring the accuracy of weight change information. [Effects of the Invention]

[0024] According to the present invention configured in this way, a biometric information measurement system that can easily measure weight changes while the subject remains lying in bed can be provided at a low cost. [Brief explanation of the drawing]

[0025] [Figure 1] This is a functional block diagram of a biological information measurement system 1 in one embodiment of the present invention. [Figure 2] This is an overall view of (a) the bed 10 and (b) the base member 13 in one embodiment of the present invention. [Figure 3] This figure shows the usage status of the biological information measurement system 1 in the same embodiment. [Figure 4] This is a perspective view of the sheet sensor 20 in the same embodiment. [Figure 5] This is a flowchart of the setting modes for the biological information measurement system 1 in the same embodiment. [Figure 6] This is a flowchart of the measurement modes of the biological information measurement system 1 in the same embodiment. [Figure 7] This is a flowchart of the calibration mode of the biological information measurement system 1 in the same embodiment. [Figure 8] This is a functional block diagram of a biological information measurement system 1 in another embodiment of the present invention. [Modes for carrying out the invention]

[0026] <One Hundred Ideas> An embodiment of the biological information measurement system 1 according to the present invention will be described below with reference to the drawings. The same reference numerals are used for identical components, and their descriptions will be omitted as appropriate.

[0027] As shown in Figure 1, the biological information measurement system 1 of this embodiment measures, for example, the weight change of a subject P lying on a bed 10, and comprises a sheet sensor 20, a reclining state information detection means 30, a data management device 40 that receives and transmits various data obtained from the sheet sensor 20 and the reclining state information detection means 30, an input means 50, a notification means 60, and a display unit 70.

[0028] <bed> As shown in Figure 2(a), the bed 10 of this embodiment includes a base member 13 that supports a mattress 12 (not shown) on which the subject P sleeps, and a bed frame 11 that supports the base member 13. The bed frame 11 includes a frame body 111 that supports the base member 13, and legs 112 that horizontally support the frame body 111.

[0029] As shown in Figure 2(b), the base member 13 is divided into, for example, three parts: an upper body support member 131a that supports the subject P from the head to the buttocks, a thigh support member 131b that supports the buttocks to the knees, a lower leg support member 131c that supports the knees to the toes, and a buttock hinge 132a and a knee hinge 132b that rotatably connect these parts.

[0030] The bed 10 further includes a drive member 141 (not shown) that changes the posture of the base member 13, and a controller 142 that controls this change. The drive member 141 lifts the upper body and lower limbs of the person being measured P by, for example, rotating the upper body support member 131a around the hip hinge 132a or lifting the knee hinge 132b. The controller 142 is positioned on the bed frame 11 so that it can be operated by the person being measured P or the caregiver N on the mattress 12.

[0031] <Configuration of each part of the biological information measurement system 1> Next, we will explain the details of each part of the biological information measurement system 1. The sheet sensor 20 of this embodiment is used by being placed between the mattress 12 and the base member 13. As shown in Figure 4, the sheet sensor 20 is provided with a flexible sheet body 21 made of, for example, a soft synthetic resin or elastomer, on which a plurality of load sensor units 22 are arranged in a grid. These load sensor units 22 are load sensors that detect load information in a direction perpendicular to the sensor surface. The sheet sensor 20 also includes a load information calculation unit 23, which is a local computer that acquires the load information obtained by the plurality of load sensor units 22 and outputs it along with the date and time the load information was acquired. This load information calculation unit 23 may be provided in the data management device 40.

[0032] The recumbent position information detection means 30 of this embodiment outputs recumbent position information. Here, recumbent position information refers to information indicating the posture of the bed, and specifically, it is the inclination angle of the upper body support member 131a, the thigh support member 131b, and the thigh support member 131b. The recumbent position information detection means 30 comprises, for example, an optical angle sensor 31 and a recumbent position information calculation unit 32. The angle sensor 31 is connected to the buttock hinge 132a and the knee hinge 132b and detects the angle AH between the upper body support member 131a and the horizontal plane, the angle BH between the thigh support member 131b and the horizontal plane, and the angle BC between the thigh support member 131b and the lower leg support member 131c.

[0033] Furthermore, the recumbent state information calculation unit 32 is a local computer that converts signals obtained from the angle sensor 31 into recumbent state information. Specifically, the recumbent state information calculation unit 32 acquires angles AH, BH, and BC shown in Figure 3 from the angle sensor 31, calculates the angle CH formed by the lower leg support member 131c and the horizontal plane from angles BH and BC, and outputs angles AH, BH, and CH as recumbent state information. The recumbent state information calculation unit 32 may be provided in the data management device 40.

[0034] The reclining state information detection means 30 may also acquire drive information of the drive member 141 from the controller 142 and calculate the reclining state information, and its format is not limited.

[0035] Physically, the data management device 40 is composed of one or more computer devices equipped with a CPU, memory, input / output interface, A / D converter, etc. Examples include terminal devices such as tablets, smartphones, and personal computers, as well as server devices. Functionally, the data management device 40 performs at least the functions of a recumbent state information storage unit 401, a load information storage unit 402, a determination unit 411, a weight change calculation unit 412, a weight change information storage unit 413, and a calibration unit 421, through the cooperation of the CPU and its peripheral devices according to a predetermined program stored in the memory.

[0036] The recumbent state information storage unit 401 stores the reference recumbent state information and reference range output from the recumbent state information calculation unit 32, as well as the load sensor unit position information input by the caregiver N via the input means 50. The reference lying position information referred to here indicates the basic posture of the bed 10, as defined in the setting mode described later, and the reference range refers to a predetermined range, for example, with the value of the reference lying position information as the median. Furthermore, the load sensor unit position information indicates which of the upper body support member 131a, thigh support member 131b, or lower leg support member 131c each of the multiple load sensor units 22 is positioned on.

[0037] The load information storage unit 402 stores the load information and detection date and time output by the load information calculation unit 23.

[0038] The determination unit 411 determines whether the recumbent state information obtained from the recumbent state information calculation unit 32 is within the reference range obtained from the recumbent state information storage unit 401.

[0039] The weight change calculation unit 412 calculates weight changes based on reference lying-down state information obtained from the lying-down state information storage unit 401, past load information obtained from the load information storage unit 402, and load information obtained from the load information calculation unit 23.

[0040] The weight change information storage unit 413 stores the weight change information output by the weight change calculation unit 412.

[0041] The calibration unit 421 compares the input actual weight with the corresponding load information, obtains comparison information as a result of the comparison, and calibrates the load information based on the comparison information. The term "actual weight" as used herein refers to the actual weight of the subject P measured using a scale or similar device different from the biometric information measurement system 1.

[0042] The input means 50 consists of a keyboard, touch panel, etc., and is used to input the position information of the load sensor unit and the actual body weight, as well as to switch between the three modes of the bio-information measurement system 1, which will be described later. This input means 50 may also be provided in the data management device 40.

[0043] The notification means 60 consists of a display, speaker, or lamp, and is intended to notify caregiver N that the position of the bed 10 needs to be adjusted. This notification means 60 may also be provided in the data management device 40.

[0044] The display unit 70 consists of a display, speaker, or lamp, and is for displaying weight change information acquired from the weight change calculation unit 412 to the caregiver N. This display unit 70 may also serve as the notification means 60, or it may be provided in the data management device 40.

[0045] <Operation> Next, the operation of the biological information measurement system 1 according to this embodiment will be described.

[0046] The biological information measurement system 1 of this embodiment has three modes: setting mode, measurement mode, and calibration mode. Switching between these modes is performed, for example, by a caregiver N operating the input means 50.

[0047] (a) Setting mode In setting mode, as shown in the flowchart in Figure 5, the reference range for the lateral position information used to measure weight change is set, and load information that serves as the basis for changes over time is acquired.

[0048] First, caregiver N determines the position of the bed 10 and the body position of the person being measured when measuring weight changes, and these are designated as the basic posture / position (S1). It is desirable that this basic posture / position be any posture or position that is easy for caregiver N to adjust or easy for the person being measured to assume. Next, information on the lying-down state in the basic posture / position is acquired (S2), and a reference range is set and stored based on this (S3). To explain this in detail, the angle sensor 31 acquires angles AH, BH, and BC as shown in Figure 3, the lying-down state information calculation unit 32 calculates angle CH from angles BH and BC, and the respective angles AH, BH, and CH are stored in the lying-down state information storage unit 401 as reference lying-down state information, and a range of ± a few percent of the value of the reference lying-down state information, for example, a range of 97% to 103%, is stored as the reference range.

[0049] Simultaneously, the load sensor unit 22 acquires load information of the person being measured P, the load information calculation unit 23 outputs the load information along with the acquisition date and time, and the load information and the date and time are stored in the load information storage unit 402 (S4).

[0050] Furthermore, caregiver N operates the input means 50 to input the position information of the load sensor unit, and the recumbent state information storage unit 401 stores the position information of the load sensor unit (S5).

[0051] (b) Measurement mode In measurement mode, the system first determines whether the posture on bed 10 is the basic posture, and then measures the change in body weight.

[0052] As shown in the flowchart of FIG. 6, first, similarly to the setting mode, the angle sensor 31 acquires angles AH, BH and BC, and the recumbent state information calculation unit 32 calculates an angle CH from said angles BH and BC, and outputs the calculated angle CH as recumbent state information (S6). Next, the determination unit acquires said recumbent state information from the recumbent state information calculation unit 32 and acquires a reference range from the recumbent state information storage unit 401, respectively, and determines whether the value of said recumbent state information falls within said reference range (S7).

[0053] When it is determined that the value is out of the reference range, the notification means 60 notifies the caregiver N of the determination result (S8), the caregiver N adjusts the posture / body position, and the operations of S6 to S8 are repeated until the value falls within the reference range. Only when it is determined that the value is within the reference range, the weight change calculation unit 412 and the load information storage unit 402 are set to acquire the load information and the date and time (S9).

[0054] Next, using said load information, the weight change calculation unit 412 calculates weight change information (S10). Here, a method for calculating weight change information in the weight change calculation unit 412 will be described.

[0055] As shown in FIG. 3, when the base member 13 provided with the sheet sensor 20 is bent, the load information F detected by each load sensor unit 22 can be decomposed into x-direction and y-direction components f x , f y respectively, and the sum of each f y corresponds to the body weight of the subject P.

[0056] The weight change calculation unit 412 classifies the load information based on the load sensor unit position information acquired from the recumbent state information storage unit 401, and calculates the total load sums f xa , f xb and f xc are calculated. The total sums f xa , f xb and f xcThis is the sum of load information obtained from load sensor units 22 located on top of the upper body support member 131a, the thigh support member 131b, and the lower leg support member 131c, respectively.

[0057] Similarly, the load information for the basic posture / position stored in the load information storage unit 402 in setting mode is also used to calculate the sum of the loads at each position, and this is then summed up f xa0 ,f xb0 and f xc0 Let's assume that.

[0058] Using the reference lying-down state information obtained from the lying-down state information storage unit 401, namely angles AH, BH, and CH, the weight change information ΔW is calculated based on equation 1.

number

[0059] The weight change information calculated by the weight change calculation unit 412 is stored in the weight change information storage unit 413 along with the date and time the load information was acquired, and is notified to the caregiver N by the display unit 70 (S11).

[0060] (c) Calibration mode In calibration mode, (as shown in the flowchart in Figure 7) the load information already acquired is calibrated with the actual body weight. The actual body weight referred to here is the actual weight of the person being measured P, measured using a scale or similar device different from this biometric information measurement system 1.

[0061] Specifically, caregiver N inputs their actual weight and the date and time of measurement using the input means 50 (S12), and the calibration unit 421 compares the actual weight with load information stored in the load information storage unit 402 that was acquired at a date and time similar to the date and time of measurement of the actual weight (S13), and calibrates the load information based on the comparison information. The calibrated load information is then stored in the load information storage unit 402.

[0062] <Effects of this embodiment> With the bio-information measurement system 1 configured in this way, the angle sensor 31 detects the reclining position information of the bed 10, the determination unit determines whether the detected position is the same as a predetermined basic position, and the notification means 60 notifies the caregiver N, so that the caregiver N can adjust the position of the bed 10 to the basic position. As a result, the position of the bed 10 will be the same for each measurement, and the measurement conditions can be standardized, so that weight change information can be measured with high accuracy.

[0063] Furthermore, since this biometric information measurement system 1 measures weight change information rather than the weight of the person being measured P, it can calculate weight change information from the relative value of the current load information based on past load information. Therefore, it does not require a load sensor that can measure the absolute value of the load with high precision, and can be provided at a low cost. Moreover, since weight change information can be stored in the weight change information storage unit 413, it can accumulate information necessary for the patient's health management and can be used, for example, as an indicator for doctors to judge the patient's health status during medical examinations.

[0064] In addition, the sheet sensor 20 of the biometric information measurement system 1 in this embodiment has a load sensor unit 22 attached to a flexible sheet body 21, so it can be used by placing it under the mattress 12, and there is no need to prepare a hard floor surface or a large space for installation. Furthermore, since the biometric information measurement system 1 can be configured by installing the sheet sensor 20 and the angle sensor 31 on the bed 10, it can be incorporated into, for example, a commercially available bed used by the person being measured P, and can be introduced into the living environment of the person being measured P without any difficulty.

[0065] Furthermore, since weight changes can be measured simply by adjusting the position of the bed 10 and the position of the subject P lying on it to a position that is easy for caregiver N to adjust or easy for subject P to assume, caregiver N does not need to lift or transfer subject P for weight measurement, reducing the burden on caregiver N and subject P, and consequently improving the quality of other care.

[0066] Furthermore, since this biometric information measurement system 1 can be used by placing it under the mattress 12, it does not need to support heavy objects such as a bed frame, making it easier to create a durable sheet sensor 20, and allowing for inexpensive manufacturing.

[0067] In this embodiment, the bio-information measurement system 1 can acquire load information with high accuracy because the calibration unit 421 calibrates the load information using the actual body weight. As a result, it is possible to calculate weight change information necessary for the health management of the person being measured P with greater accuracy.

[0068] <Modified Embodiment of the Invention> However, the present invention is not limited to the embodiments described above.

[0069] The weight change calculation unit may calculate weight change information not only when the judgment unit determines that the lateral recumbent state information is within the standard range, but at all times, and may use only the weight change information calculated from the load information when it is within the standard range as valid data.

[0070] The weight change calculation unit may calculate an estimated weight along with the weight change information.

[0071] The base member may be divided into two, four, or five pieces, and the number is not limited. Furthermore, the base member may be bent not only in the length direction but also in the width direction.

[0072] The notification means 60 may notify the determination result when it is determined that the reclining state information is within the standard range, or it may notify the determination result regardless of whether it is within or outside the standard range.

[0073] The weight change information may be transmitted not only to the display unit 70, but also, for example, to the terminal of the subject P's attending physician connected via a wireless network. With such a configuration, the weight change information can be used more effectively for the subject P's health management.

[0074] The recumbent position information detection means 30 may be, for example, installed above the bed 10 and equipped with an imaging device that detects the posture of the bed 10 and the position of the person being measured P, or it may acquire load information from the load sensor unit 22 and detect the position of the person being measured P from its distribution.

[0075] In another embodiment of the biological information measurement system 1, for example, load information and lying-down state information may be stored linkedly in a lying-down state information storage unit 401, and a weight change calculation unit 412 may calculate weight change information from the time-dependent changes in load information and lying-down state information. With such a biometric information measurement system 1, the caregiver N does not need to adjust the position of the bed 10 and the position of the person being measured P each time for measurement, thus reducing the burden on both the caregiver N and the person being measured P.

[0076] In another embodiment of the biological information measurement system 1, as shown in Figure 8, the data management device 40 may include a machine learning unit 414. This machine learning unit 414 constructs a learning model using actual body weight and load information and lying-down state information acquired at a date and time similar to the actual body weight as training data. In this embodiment, the weight change calculation unit 412 calculates the weight change from the load information and lying-down state information based on the learning model. With a biometric information measurement system 1 configured in this way, the system can be built more easily, and weight change information can be calculated with greater accuracy.

[0077] Furthermore, it goes without saying that the present invention is not limited to the embodiments described above, and various modifications are possible without departing from its spirit. [Explanation of symbols]

[0078] 1. Biometric Information Measurement System 10 beds 11 Bed frame 111 Frame Body 112 legs 12 mattresses 13 base components 131a Upper body support member 131b Thigh support member 131c Lower leg support member 132a Hip hinge 132b Knee hinge 141 Drive Member 142 controllers 20 Sheet Sensors 21 sheet body 22 Load Sensor Unit 23 Load Information Calculation Unit 30. Means for detecting information about a recumbent position 31 Angle Sensor 32. Lying-down state information calculation unit 40 Data Management Devices 401 Supine position information storage unit 402 Load Information Storage Unit 411 Judgment section 412 Weight change calculation unit 413 Weight change information storage unit 421 Proofreading Department 50 Input methods 60. Notification methods 70 Display section

Claims

1. A biometric information measurement system that measures the biometric information of a person lying on a bed, A sheet sensor comprising a flexible sheet body and load sensor units provided at multiple locations on the sheet body, which outputs load information detected by each load sensor unit, A recumbent state information detection means detects the posture of the bed and / or the body position of the person on the bed, and outputs recumbent state information as a result of the detection; A determination unit that determines whether the value of the aforementioned recumbent state information is within a predetermined reference range, If the value of the reclining position information is within a predetermined reference range, a weight change calculation unit calculates weight change information indicating the change in the person's weight based on the change in load information over time output from the sheet sensor placed between the bed and the person. A biological information measurement system characterized by comprising a weight change information storage unit for storing the aforementioned weight change information.

2. The aforementioned biological information measurement system further includes a calibration mode, When the aforementioned calibration mode is selected, The aforementioned weight change calculation unit, The actual weight of the person obtained by measuring it with a weighing scale is compared with the corresponding load information, and the comparison information, which is the result of this comparison, is obtained. A biological information measurement system according to claim 1, which corrects the load information based on the comparative information.

3. A method for measuring biological information of a person lying on a bed, using a sheet sensor that outputs load information detected by load sensor units provided at multiple locations on a flexible sheet body, and a lying-down position information detection means that detects the posture of the bed and / or the body position of a person on the bed and outputs the resulting lying-down position information, wherein the biological information of a person lying on the bed is measured, Determine whether the value of the aforementioned recumbent position information is within a predetermined reference range. If the value of the reclining position information is within a predetermined reference range, weight change information indicating the change in the person's weight is calculated based on the change in the load information output from the sheet sensor placed between the bed and the person over time. A method for measuring biological information, characterized by storing the aforementioned weight change information.

4. A program applied to a biological information measurement system for measuring the biological information of a person lying on a bed, comprising: a sheet sensor that outputs load information detected by load sensor units provided at multiple locations on a flexible sheet body; and a lying-down position information detection means that detects the posture of the bed and / or the body position of a person on the bed and outputs the resulting lying-down position information; A determination unit that determines whether the value of the aforementioned recumbent state information is within a predetermined reference range, If the value of the reclining position information is within a predetermined reference range, a weight change calculation unit calculates weight change information indicating the change in the person's weight based on the change in load information over time output from the sheet sensor placed between the bed and the person. A biological information measurement program characterized by causing a computer to perform the function of a weight change information storage unit for storing the aforementioned weight change information.

5. A biometric information measurement system that measures the biometric information of a person lying on a bed, A sheet sensor comprising a flexible sheet body and load sensor units provided at multiple locations on the sheet body, which outputs load information detected by each load sensor unit, A recumbent state information detection means detects the posture of the bed and / or the body position of the person on the bed, and outputs recumbent state information as a result of the detection; A weight change calculation unit calculates weight change information indicating the weight change of the person by comparing the load information and the lying-down state information output from the sheet sensor placed between the bed and the person over time. A biological information measurement system characterized by comprising a weight change information storage unit for storing the aforementioned weight change information.

6. The aforementioned biological information measurement system further includes a calibration mode, When the aforementioned calibration mode is selected, The aforementioned weight change calculation unit, The actual weight of the person obtained by measuring it with a weighing scale is compared with the load information and the information on the lying-down position at that time, and comparison information, which is the result of the comparison, is obtained. The biological information measurement system according to claim 5, which corrects the load information based on the comparative information.

7. The biological information measurement system according to claim 5 or 6, wherein the weight change calculation unit calculates the weight change information based on a learning model constructed using the actual weight and the change values ​​of the load information and the lying-down state information at that time as training data.

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