JP2005204932A - Sheet tool for bed monitoring and bed monitoring device using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet tool for bed monitoring capable of being easily spread on a bed having various forms and monitoring the movement of a patient lying on the bed. <P>SOLUTION: The sheet tool for bed monitoring relating to this invention is provided with a cover 6 spread on the bed and a cushion material 8 in a surface contact with the cover 6. A plurality of pressure sensitive sensors 13 are arranged so as to monitor the movement of a person on the bed between the cover 6 and the cushion material 8, and a support member 14 for preventing the pressure sensitive sensors 13 from sinking in the bed is provided between the pressure sensitive sensors 13 and the cover 6. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to a bed monitoring bed sheet device that makes it possible to monitor the movement of a person sleeping on a bed such as a bed, and a bed monitoring device using the same.

As a bed monitoring device (bed monitoring device) that recognizes the movement of a person (patient) sleeping in a bed in a hospital or the like, there is one shown in FIG.
In this bed monitoring device, a plurality of pressure sensitive sensors 62 are arranged vertically and horizontally below the mattress 61 of the bed 60, and each pressure sensitive sensor 62 is connected to the control unit 63, and is taken out from each pressure sensitive sensor 62 by the control unit 63. A plurality of load signals (resistance values) are converted into load values, and the patient's movement is estimated based on the load values (for example, Patent Document 1).
JP 2001-258957 A

In the conventional bed monitoring device, each pressure sensor is arranged directly on the inside or the surface of the mattress placed on the bed. Therefore, the bed monitoring device can be easily removed or attached to another bed. The patient who wanted to be monitored had to be put on a predetermined bed.
However, in hospitals where many patients are hospitalized, it is common for patients to move to other beds depending on the relationship with other patients and the treatment situation, and it is not always possible to lay patients in a fixed bed. It was difficult.

In addition, when it is desired to monitor the movement of a patient at home for home nursing, the use of the bed monitoring device described in Patent Document 1 for a bed or futon at home increases the installation work and costs. Became bulky.
Therefore, in view of the above problems, the present invention provides a bed that can be easily laid on a bed (bed or futon) having various forms and can monitor the movement of a patient sleeping on the bed. An object of the present invention is to provide a monitoring sheet and a bed monitoring device using the same.

In order to achieve the above object, the present invention takes the following technical means.
That is, the technical means for solving the problems in the present invention includes a cover laid on the bed and a cushion material that is in contact with the cover, and the bed and the cushion material are provided on the bed. A plurality of pressure-sensitive sensors whose outputs change according to the pressing force are arranged to monitor the movement of the person, and when the pressing force is applied between the pressure-sensitive sensor and the cover, the pressure-sensitive sensors are placed on the bed. A support member is provided for preventing the sinking into the housing.

According to this technical means, the bed monitoring bed sheet is not fixed to the bed but is removable from the bed, and can be easily laid on a bed (bed or futon) having various forms. The movement of the person on the bed can be monitored by the output of the pressure sensor. The pressure sensor is prevented from sinking to the bed by the support member, and the sensitivity of the pressure sensor is not unstable due to the cushioning property of the mattress. Can be reliably detected.
Further, the technical means for solving the problems in the present invention is that the plurality of pressure sensitive sensors are arranged at a predetermined interval so as to be distributed throughout the bed, and the support members are arranged along the arrangement direction of the pressure sensitive sensors. It is provided.

According to this technical means, since the pressure-sensitive sensors are provided so as to be distributed throughout the bed at predetermined intervals, it is possible to accurately detect the movement of the patient in the entire bed. Furthermore, since a breathable cushioning material is provided on the pressure sensor and the wiring, there is no possibility that the person sleeping on the bed sheet feels uncomfortable.
Further, the technical means for solving the problem in the present invention is characterized in that the pressure sensor is disposed between a bed cover and a cushioning material after being housed in a housing having a waterproof function. To do.

According to this technical means, it becomes possible to prevent the pressure-sensitive sensor from malfunctioning or deteriorating due to sweat or the like from a person sleeping on the bed sheet.
Further, the technical means for solving the problems in the present invention has an output wiring for sending out the output of the pressure sensor, and this output wiring is led out from the central part of the bed in the width direction to the outside of the bed. It is characterized by.
According to this technical means, the output of the pressure sensor can be sent to the outside of the bed via the output wiring. In addition, since this output wiring is not provided on the front side (human head side) or rear side (human lower limb side) of a bed such as a bed, the bed reclining operation (lifting the front and rear parts) ), It is not necessary to lengthen the output wiring.

Further, the technical means for solving the problem in the present invention is that the impedance of the pressure sensitive sensor changes according to the applied pressing force, and a plurality of the pressure sensitive sensors are arranged at predetermined intervals and are mutually connected. A sensor unit is configured by being connected in parallel, and this sensor unit is arranged to divide the entire bed into a plurality of vertical and horizontal blocks.
According to this technical means, a large movement such as a change in the posture of a patient is detected by the output of a sensor unit that is configured by connecting pressure-sensitive sensors in parallel and that divides the bed into a plurality of blocks. Is possible. Further, the pressure sensor has a variable impedance such as a resistance value and a capacitance, is not mechanical, and can be miniaturized.

Further, the technical means for solving the problems in the present invention is based on the output of the pressure-sensitive sensor provided in the bed monitoring sheet described in any of the above technical means, and the movement of a person on the bed is determined. And having a bed monitoring device for monitoring.
According to this technical means, by using the bed monitoring device, it is possible to detect and recognize the movement of a person on the bed based on the output of the pressure sensor.

  The bed monitor sheet according to the present invention can be easily laid on a bed (bed or futon) having various forms, and the use of the bed monitor bed sheet makes it possible to sense the movement of a patient sleeping on the bed. It can be sent out as the output of the pressure sensor. Further, by using a bed monitoring device, it is possible to monitor the movement of a person on the bed based on the output of the pressure sensor.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In hospitals and elderly care facilities, patients and residents often have a lifestyle that goes to bed, and the beds used are generally rectangular in plan view as shown in FIG. It has the base 4 formed and the mattress 5 laid on the base 4. On the upper surface of the mattress 5, a bed monitoring sheet tool 40 according to the present invention is spread and a person M lies on it.
Hereinafter, the bed monitoring sheet tool 40 is simply referred to as a bed sheet tool. In addition, assuming a hospital, a person M lying on the bed 3 and the bed sheet 40 is called a patient as a bed.

The left-right direction in FIG. 7 is referred to as the longitudinal direction of the bed sheet 40 (bed 3 or mattress 5), and the up-down direction in FIG. 7 is referred to as the width direction of the bed sheet 40 (bed 3 or mattress 5).
As shown in FIGS. 1 and 2, the bed sheet 40 includes a cover 6 that is spread on a mattress 5 that is a bed and a cushion material 8 that is in contact with the cover 6, and the cover 6 and the cushion material. 8, a plurality of pressure-sensitive sensors 13 whose outputs change according to the pressing force to monitor the movement of the patient M on the mattress 5 are arranged at predetermined intervals so as to be distributed throughout the mattress 5. ing.

Specifically, the sheet material 40 has a cover 6 that covers the entire top surface of the mattress 5, and the sensor unit 2 described later divides the entire mattress 5 into a plurality of vertical and horizontal blocks on the cover 6. It is arranged. The sensor unit 2 includes a plurality of pressure-sensitive sensors 13 so that the movement of the patient M on the mattress 5 can be monitored, and a male surface fastener (hard surface fastener) 17 is provided on the upper surface thereof. ing.
On the cover 6 on which the sensor unit 2 is disposed, a cushion material 8 such as urethane or non-woven fabric is provided so as to be in contact with the sensor unit 2. In other words, the sensor unit 2 is sandwiched between the cover 6 and the cushion material 8. It is arranged so as to be.

A mounting sheet 7 serving as a female surface fastener is affixed to the lower surface of the cushion material 8 via a double-sided heat sealing tape or the like, and the male surface fastener 17 is detachably attached to the mounting sheet 7. The sensor unit 2 is attached to the mounting sheet 7, that is, the cushion material 8 and is fixed in position. Similarly, the position of the output wiring 22 is also fixed by attaching the male surface fastener 17 provided so as to be scattered on the upper surface of the output wiring 22 to the mounting sheet 7.
A waterproof cloth 9 formed slightly wider than the cushion material 8 is spread on the cushion material 8, and the edge of the waterproof cloth 9 is folded under the cover 6.

Thus, the sheet material 40 is composed of the cover 6, the sensor unit 2, the mounting sheet 7, the cushion material 8, and the waterproof cloth 9 provided so as to wrap these, and is slightly smaller than or the same as the upper surface of the mattress 5. The size is rectangular in plan view. The sheet 11 is provided so as to wrap the sheet tool 40 and the mattress 5. Alternatively, the bed 11 may be laid after the bed pad is laid on the sheet material 40.
As shown in FIGS. 1, 6, and 7, the sensor unit 2 is divided and arranged in a plurality of sheets 40 in order to divide the mattress 5 into a plurality of blocks.

Specifically, four sensor units 2 are arranged in the width direction (lateral direction) of the mattress 5, and four sensor unit groups arranged in the width direction are arranged in four rows in the length direction (vertical direction) of the mattress 5. 16 sheets of sensor units 2 are provided in the sheet material 40 in total. The plurality of sensor units 2 have the same size (area), the arrangement intervals in the width direction of the sensor units 2 are substantially constant, and the arrangement intervals in the length direction of the sensor units 2 are also substantially constant.
Further, by forming cuts 51, 52, 53 in the width direction in the cushion material 8 so as to divide the longitudinal direction of the cushion material 8 into approximately four parts, the cushion material 8 is cut into the cuts 51, 52, 53. Can be folded in a bellows shape.

The sensor unit 2 includes a plurality of pressure-sensitive sensors 13 arranged at predetermined intervals and connected in parallel to each other. As shown in FIGS. 1, 3, and 4, the plurality of pressure-sensitive sensors 13 13, a substrate 15 to which these pressure-sensitive sensors 13 are attached, a support plate 14 having flexibility, a storage body 16, and a male surface fastener (attachment) 17.
The pressure-sensitive sensor 13 is, for example, a conductive ink printed on a base material such as a plastic film by screen printing to form a contact, and the contact is arranged in a vertically opposed manner via a spacer, A material obtained by bonding a conductive rubber and a bipolar electrode can be used.

The pressure-sensitive sensor 13 has a resistance value (impedance value) that continuously changes in accordance with the pressure applied to the upper surface of the contact. When no pressure is applied to the pressure-sensitive sensor 13 as shown in FIG. The resistance value is large, and the resistance value decreases as a load is applied to the pressure sensor 13.
A plurality (eight) of such pressure-sensitive sensors 13 are provided in the sensor unit 2 so as to be distributed substantially evenly over the entire area, and each of the pressure-sensitive sensors 13 is formed in a sheet shape. The pressure sensitive sensors 13 are connected in parallel to each other by printed wiring on the sheet substrate 15.

Specifically, four pressure-sensitive sensors 13 are provided on one sheet substrate 15 at a predetermined interval L in the longitudinal direction of the sheet substrate 15, and one unit sensor 2 has two rows of sheets. The substrates are arranged so as to be substantially parallel to each other. At this time, it is preferable that the distance between the pressure-sensitive sensors facing each other is also substantially L.
Two wirings 20 a and 20 b extending in the longitudinal direction are printed on the sheet substrate 15, and two lead wires 21 a and 21 b are led out from the pressure sensor 13. The lead wire 21 a is connected to one wiring 20 a of the substrate 15, and the other lead wire 21 b is connected to the other wiring 20 b of the substrate 15.

The wirings 20 a and the wirings 20 b of the sheet substrate 15 in two rows are connected to each other via a connection line 19.
On the lower surface side of the sheet substrate 15 and the four pressure sensors 13 connected thereto, a support plate 14 (support member) for preventing the pressure sensor 13 from sinking into the mattress 5 when a pressing force is applied. The support plate 14 is disposed along the direction in which the pressure sensors 13 are arranged.
The support plate 14 is, for example, a rectangular plate formed of polycarbonate resin which is not easily deformed or warped and is not easily broken, and can place one sheet substrate 15 and four pressure sensors 13 attached thereto. It has an area. The thickness of each support plate 14 is set to about 0.5 mm and can be bent.

Since the support plate 14 has a larger area than the pressure sensor 13, even when the mattress 5 is too soft, the pressure sensor 13 can be prevented from sinking into the mattress 5, and the pressure sensor 13 can react reliably. To come.
The pressure-sensitive sensor 13 and the support plate 14 disposed on the lower surface of the pressure-sensitive sensor 13 are housed in a waterproof housing 16 formed of a polyethylene sheet or the like.
That is, the storage body 16 has a rectangular upper sheet 16a and a lower sheet 16b in plan view, and is formed into a bag shape by welding the peripheral edge of the upper sheet 16a and the peripheral edge of the lower sheet 16b. A pressure sensitive sensor 13, a sheet substrate 15, a support plate 14 and the like are accommodated therein. The aforementioned surface fasteners 17 are provided at the four corners of the outer upper surface of the storage body 16 and at both ends in the width direction of the substantially middle portion in the longitudinal direction.

A double-sided tape 18 for bonding the upper sheet 16a and the lower sheet 16b is provided at the center of the storage body 16, thereby preventing the support plate 14 from inadvertently moving in the storage body. I am doing so.
As shown in FIG. 3, two unit output wirings 22 for outputting the output resistance value R of the sensor unit 2 are derived from each sensor unit 2. The unit output wiring 22 can be wired from the inside of the storage body 16 to the outside through a wiring hole 23 provided at the front end of the storage body 16. The wiring hole 23 is closed with a waterproof adhesive, whereby the housing body 16 is sealed so that liquids such as water droplets do not enter the housing body 16.

By applying a voltage to the two unit output wires 22 and 22, a current corresponding to the resistance value flows, and the output resistance value R of the sensor unit 2 can be calculated from the current voltage. Then, the pressing force applied to the sensor unit 2 is calculated.
Since the sensor unit 2 having the above-described configuration has 16 pressure sensors 13 connected in parallel, its output value (output resistance value) R is the resistance value of each pressure sensor r1, r2, r3. If it is set to r8, it can be calculated by the following formula.
1 / R = 1 / r1 + 1 / r2 + 1 / r3 + ... + 1 / r8
Therefore, if the pressing force per unit area is constant and the pressing area for pressing the sensor unit 2 is large, the output resistance value R of the sensor unit 2 is small. Conversely, if the pressing area is small, the output resistance value extracted from the sensor unit 2 is small. R increases and the amount of change increases (the sensitivity of the sensor unit is improved). That is, the sensor unit 2 has a characteristic that the output resistance value R of the sensor unit 2 increases or decreases according to the pressing area when the pressing force is constant.

In addition, when the pressing area for pressing the sensor unit 2 is constant, the output resistance value R decreases when the pressing force is large. Conversely, when the pressing force is small, the output resistance value R increases and the amount of change is large. . That is, the sensor unit 2 has a characteristic that when the certain area is pressed, the output resistance value R increases or decreases depending on the magnitude of the pressing force.
The sensor units 2 are evenly arranged inside the sheet material 40, and unit output wirings 22 are led out from the sensor units 2.
Each unit output wiring 22 is sandwiched between the cover 6 and the cushion material 8, and is bundled into a flat cable-shaped output wiring 41 while passing between the sensor units 2 and the edge of the cushion material 8. It is led to the outside in the width direction side and the longitudinal center part. Note that male surface fasteners 17 are attached to each output wiring 22 in some places, and are fixed to the attachment sheet 7 together with the sensor unit 2. The waterproof cloth 9 and the cover 6 are removable and can be washed.

This output wiring 41 can be connected to a voltage converter 28 described later.
As shown in FIG. 9, an opening 42 is formed in the waterproof cloth 9 at the side in the width direction and in the center in the longitudinal direction of the sheet material 40, and the output wiring 41 is outside through the opening 42. To be drawn.
Furthermore, a first cloth member 43 (covering member) that covers the opening 42 from above is provided in the opening 42 so as to hang down, and further, a second cloth member 44 (first cover) that covers the first cloth member 43 from above. 2 covering members) are provided. Specifically, the second cloth member 44 is formed by making two notches in the width direction at the end of the waterproof cloth 9, and a rectangular cloth 45 made of the same material as the waterproof cloth 9 is formed on the waterproof cloth from the back side of the portion. 9 is attached with a double-sided heat-sealing tape. A first cloth member 43 and an opening 42 are formed by making a U-shaped cut at the approximate center of the rectangular cloth 45.

As described above, the opening 42 through which the output wiring 41 is drawn out is covered with the plurality of covering members 43 and 44, so that the patient M sleeping on the bed sheet 40 may spill drinks or incontinence. Even when it is done, it becomes possible to prevent moisture from entering the sheet material 40 through the opening 42.
Further, since the output wiring 41 is not provided on the front side (the patient M's head side) or the rear side (the patient's M lower limb side) of the mattress 5, the reclining operation of the bed 3 (the bed part supporting the head) Therefore, it is not necessary to make the output wiring 41 itself long so that it can cope with jack-up). It is preferable to fold the output wiring 41 together with the sheets 11 to the back side of the mattress 5 so that the output wiring 41 does not get in the way.

In the bed monitoring sheet 40 described above, in order to recognize the movement of the patient M, a plurality of pressure sensors 13 are connected to each other to form a unit, and the mattress 5 is partitioned vertically and horizontally by the unitized sensor unit 2. Thus, since the output of the sensor unit 2 is taken out, the number of unit output wirings 22 can be reduced with respect to the entire mattress 5, and as a result, the wiring structure can be simplified.
Further, in the processing of the output data, it is only necessary to process the output of the unitized sensor unit 2, and it is not necessary to process all the outputs obtained from each pressure sensor 13, so that the output processing is easy to perform. It has become a thing.

Next, the bed monitoring apparatus 1 that enables monitoring of the movement of the patient M on the mattress 5 using the output of the pressure-sensitive sensor 13 provided in the bed monitoring sheet 40 will be described.
As illustrated in FIG. 6, the bed monitoring apparatus 1 includes a bed monitoring sheet tool 40 and a voltage conversion unit 28 that converts an output (resistance) extracted from the sensor unit 2 provided in the bed sheet 40 into a voltage. And an A / D converter 29 for A / D converting the voltage converted by the voltage converter 28, a control unit 31 (personal computer), and a display unit 32 (monitor).
As shown in FIGS. 6 and 7, the sheet material 40 is spread over the entire upper surface of the bed 3, and the plurality of sensor units 2 partitions the mattress 5 into a plurality of blocks.

As described above, the pressure-sensitive sensors are arranged at a constant interval L in one sensor unit 2, but the interval in the width direction of the pressure-sensitive sensor 13 is also constant between adjacent sensor units 2 and 2. It is very preferable to arrange a plurality of sensor units 2 so as to be L. By doing so, the pressure-sensitive sensors 13 are arranged in a grid pattern on the entire surface of the sheet material 40.
As shown in FIG. 6, channel numbers 0 to 15 (ch 0 to 15) are assigned to the plurality of sensor units 2, respectively. ).

With the patient M lying on the bed sheet 40, the four sensor units 2 to ch0 to 3 correspond to the head and chest of the patient M, and the four sensor units 2 to ch4 to 7 Corresponding to the chest and waist of M, the four sensor units 2 of ch8 to 11 correspond to the thigh of the patient M, and the four sensor units 2 of ch12 to 15 are located on the lower leg of the patient M. It corresponds.
Therefore, the eight sensor units 2 of ch0 to 7 correspond to the upper body of the patient M, and the eight sensor units 2 of ch8 to 15 correspond to the lower body of the patient M.
The unit output wirings 22 coming out of the sensor units 2 are combined into an output wiring 41 and then connected to the voltage conversion unit 28. This voltage converter 28 converts the output resistance value R of each sensor unit 2 into a voltage by a resistance voltage dividing circuit or the like.

For example, if the pressing force acting on one sensor unit (one block) is large as shown in FIG. 8, the resistance output from the corresponding sensor unit 2 decreases, and the voltage output from the voltage converter 28 increases. Conversely, when the pressing force acting on the block is small, the resistance output from the corresponding sensor unit 2 increases, and the voltage output from the voltage converter 28 decreases.
The voltage output from the voltage conversion unit 28, that is, the voltage corresponding to the pressing force applied to the sensor unit 2, is sent to the A / D conversion unit 29 and converted into a 10-bit (0 to 1023) digital signal. 31 is transmitted. In the A / D converter 29, the output signal (voltage) of the voltage converter 28 is set so that the numerical value increases as the voltage increases.

  Based on the digital signal input from the A / D conversion unit 29, the personal computer 31 determines (estimates) what position the patient M sleeping on the bed sheet 40 has taken, The acting pressing force can be displayed via the monitor 32. Thus, for example, by monitoring the personal computer 31 installed in a room (for example, a nurse station) different from the bed 3 on which the sheet material 40 is laid, the state of the patient M on the bed 3 can be remotely monitored. Can be estimated and recognized. The number of the pressure-sensitive sensors 13 provided in the sheet material 40 is large, and the change in the posture of the patient can be used as detailed data. Can be protected.

In addition, it is very preferable that the monitor 32 connected to the personal computer 31 displays the pressing force applied to each sensor unit 2 in a color display. The posture of M can be estimated and judged.
The bed monitoring sheet tool 40 according to the present embodiment is not limited to the above embodiment.
That is, the pressure sensor 13 has a resistance value that changes in accordance with the pressing force, but may have a capacitance or inductance that changes, and directly outputs a voltage or a current in accordance with the pressing force. It may be a thing.

Further, the bed 3 has been described by exemplifying the bed 3, but is not limited thereto, and may be a futon laid on the floor or the like. There is no problem even if the sheet material 40 is spread directly on the floor. The installation place of the bed monitoring sheet 40 is not limited to a hospital or a nursing facility, and may be a general home.
Further, although the plurality of pressure sensitive sensors 13 provided in the sensor unit 2 are connected in parallel, they may be connected in series.
In addition, the entire mattress is divided into 16 parts, that is, 4 parts in the vertical direction and 4 parts in the lateral direction by the 16 sensor units 2, but the division method is not limited at all. The whole may be divided into 15 parts, 5 parts vertically and 3 parts horizontally, and there is no problem even if the size (area) of the sensor unit 2 is different. A plurality of narrow sensor units may be provided on the head where a relatively small movement is expected.

It is a disassembled perspective view of the bed monitor for bed monitoring concerning the present invention. It is a disassembled front view of the bed monitor for bed monitoring concerning the present invention. It is a top view of a sensor unit. It is an expanded sectional front view of the bed monitor sheet material. It is an output characteristic figure of a pressure sensitive sensor. It is a block diagram which shows the whole structure of a bed monitoring apparatus. It is the figure which showed the response | compatibility with arrangement | positioning of a sensor unit, and the patient who sleeps on it. It is the figure which showed the output voltage from a sensor unit. It is an expansion perspective view of the site | part from which the output wiring is derived | led-out from the bed monitor for bed monitoring. It is a perspective view which shows a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bed monitoring apparatus 2 Sensor unit 6 Cover 8 Cushioning material 13 Pressure sensor 14 Bearing member (support plate)
16 Housing 41 Output wiring

Claims (6)

  A cover (6) laid out on the bed is provided with a cushion material (8) that is in contact with the cover (6). Between the cover (6) and the cushion material (8), A plurality of pressure sensors (13) whose outputs change according to the pressing force are arranged to monitor the movement of the person, and the pressing force is between the pressure sensor (13) and the cover (6). A bed monitor for a bed monitor, characterized in that a support member (14) is provided for preventing the pressure-sensitive sensor (13) from sinking into the bed when applied.   The plurality of pressure sensors (13) are arranged with a predetermined interval so as to be distributed over the entire bed, and the support member (14) is provided along the arrangement direction of the pressure sensors (13). The bed sheet for a bed monitor according to claim 1,   The pressure-sensitive sensor (13) is stored between a cover (6) and a cushioning material (8) after being stored in a storage body (16) having a waterproof function. Or the bed monitor for bed monitoring according to 2.   It has output wiring (41) which sends out the output of the pressure-sensitive sensor (13), and this output wiring (41) is led out from the central part of the width direction side of the bed to the outside of the bed. The bedclothes for a bed monitor according to any one of claims 1 to 3.   The impedance of the pressure sensitive sensor (13) changes according to the applied pressure, and a plurality of the pressure sensitive sensors (13) are arranged at predetermined intervals and connected in parallel to each other. (2) is comprised, This sensor unit (2) is arrange | positioned so that the whole bed may be divided | segmented into several vertical and horizontal blocks, The any one of Claims 1-4 characterized by the above-mentioned. Bed sheet monitor.   A bed monitoring device that monitors the movement of a person on the bed based on the output of the pressure-sensitive sensor (13) provided in the bed monitoring sheet (40) according to any one of claims 1 to 5. .