JP2014233490A - Side fence position detection device, side fence, and bed with side fence - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a side fence position detection device for detecting a vertical motion of a side fence for a bed, a side fence, and a bed with a side fence that can be installed with a simple configuration.SOLUTION: An atmospheric pressure sensor 10 for detecting an atmospheric pressure at a height position of a side fence 6 is attached to the side fence 6 installed along the edge on the longitudinal side of a bed 5, which can vertically move between a first position P1 and a second position P2 lower than the first position P1. A side fence position detecting device 1 includes determination means 21 for determining a vertical motion of the side fence 6 by the output data from the atmospheric pressure sensor 10. Since a change in the height position of the side fence 6 for the bed 5 is determined by the output data from the atmospheric pressure sensor 10, the vertical motion of the side fence 6 can be detected with a simple configuration in which only the atmospheric pressure sensor 10 is attached.

Description

  The present invention relates to a side fence position detection device capable of detecting vertical movement, a side fence, and a bed with a side fence.

  In medical and nursing care, a side fence (bed fence) is installed along the long edge of the bed frame so that the bed occupant will not move from the bed alone or fall off the bed. ing. The side fence becomes a hindrance during medical care and nursing, and when the landing person moves, so it is necessary to remove or lower the side fence. In order to be able to recognize this state even in a remote location, a switch with a switch attached to the side fence is known.

  For example, Patent Literature 1 discloses a bed rail nurse call in which a magnet switch is connected in parallel to a nurse call. This conventional example is shown in FIG.

  FIG. 11 is a diagram in which a magnet switch 110 is connected in parallel to a conventional nurse call and attached to a bed fence 132. The switch unit 111 of the magnet switch 110 is installed on the bed main body 131, and the magnet unit 112 is installed on the bed fence 132. Further, the magnet switch 110 is connected to a wiring to the nurse call switch 123 so that a nurse call sounds when the switch unit 111 and the magnet unit 112 are separated.

  When the patient who has landed on the bed main body 131 removes the bed fence 132 to get off the bed main body 131, a nurse call sounds. Thereby, the nurse can recognize the action that a patient who has a possibility of falling tries to act alone and can prevent the bed body 131 from falling.

JP 2003-153969 A

  However, in order to connect the magnet switch 110 to the nurse call, it is necessary to attach the switch unit 111 to the bed body 131 and attach the magnet unit 112 to the bed fence 132. In addition, since the material and shape of a general iron side fence or bed frame affect the magnetic force, it is necessary to adjust the arrangement and detection sensitivity of the magnet switch.

  The present invention solves the above-described problems, and in particular, provides a side fence position detection device, a side fence, and a bed with a side fence that can be installed with a simple configuration and detects the vertical movement of the side fence of the bed. With the goal.

  The side fence position detection device of the present invention is attached to a side fence that can move up and down between a first position installed along an edge on the longitudinal side of the bed and a second position lower than the first position. The pressure sensor includes: a barometric pressure sensor that detects a barometric pressure at a height position of the side fence; and a discriminating unit that discriminates the vertical movement of the side fence based on output data from the barometric pressure sensor.

  According to this configuration, by determining the change in the height position of the side fence of the bed from the output data of the atmospheric pressure sensor, the vertical movement of the side fence can be detected with a simple configuration in which only the atmospheric pressure sensor is attached. In addition, since there is no separate member required other than the pressure sensor that operates alone, there is a degree of freedom in designing the side rails and the side surface of the bed frame, and there is also the trouble of position adjustment etc. required when combining multiple members It can be installed with few and simple configurations.

  Further, in the side fence position detection device of the present invention, when the determination means has an absolute value of a change amount of atmospheric pressure per predetermined time calculated from output data from the atmospheric pressure sensor exceeding an absolute value of a predetermined threshold, A data processing unit that determines that the side fence has been moved up and down is provided.

  The pressure change due to the vertical movement of the side fence is abrupt. According to the above configuration, it is possible to find an abrupt atmospheric pressure change point due to the vertical movement of the side fence by determining the amount of change in atmospheric pressure per predetermined time and checking whether the magnitude is greater than a predetermined value. It is possible to accurately detect the vertical movement of the side fence based on the wind and temperature.

  Further, in the side fence position detection device of the present invention, the determination means has a first threshold value and a second threshold value, and the atmospheric pressure per predetermined time calculated from the output data from the atmospheric pressure sensor. It is determined whether the side fence has been raised by comparing the amount of change with the first threshold value, and whether the side fence has been lowered by comparing the second threshold value. A data processing unit for determining is provided.

  Both the ascending and descending actions of the side fences are more rapid than the changes in pressure due to wind and temperature, but the direction of movement is different. Also, due to the influence of gravity, it is thought that the operating speed is also different. According to said structure, it can discriminate | determine whether it is a side fence raising operation or a side fence lowering operation by setting the threshold value of each operation | movement with respect to the variation | change_quantity of the atmospheric | air pressure per predetermined time.

  Further, in the side fence position detection device of the present invention, the discrimination means time-differentiates the output data from the atmospheric pressure sensor, and when the absolute value of the time differential value exceeds the absolute value of the predetermined threshold value, A data processing unit for determining that vertical movement has been performed is provided.

  The pressure change due to the vertical movement of the side fence is abrupt. According to the above configuration, it is possible to find an abrupt pressure change point due to vertical movement of the side fence by differentiating the output data with respect to time and checking whether the absolute value of the time derivative is greater than a predetermined value. It is possible to accurately detect the vertical movement of the side fence based on the wind and temperature.

  Moreover, in the side fence position detection device of the present invention, the determination means has a first threshold value and a second threshold value, and time-differentiates the output data from the atmospheric pressure sensor to obtain a time differential value and the first threshold value. To determine whether or not the side fence has been raised, and by comparing the time differential value with the second threshold value, it is determined whether or not the side fence has been lowered. And a data processing unit.

  Both the ascending and descending actions of the side fences are more rapid than the changes in pressure due to wind and temperature, but the direction of movement is different. Also, due to the influence of gravity, it is thought that the operating speed is also different. According to the above configuration, by setting the threshold values of the side fence raising operation and the side fence lowering operation with respect to the time differential value of the output data from the atmospheric pressure sensor, it is determined whether the side fence raising operation is performed. It is possible to determine whether the fence is descending.

  Moreover, the side fence position detection apparatus of this invention is provided with the alarm transmission part which issues an alarm, when the said discrimination means discriminate | determines that the vertical movement of the said side fence was performed.

  According to this configuration, since the alarm transmitter is provided, the side fence is moved up and down, and there is a risk of falling from the bed of the landing person and the possibility of getting out of bed. Can know.

  The side fence of the present invention can move up and down between a first position installed along the longitudinal edge of the bed and a height position of a second position lower than the first position, An atmospheric pressure sensor for detecting the atmospheric pressure at the height position is provided.

  According to this configuration, by determining the change in the height position from the output data of the atmospheric pressure sensor, the vertical movement can be detected with a simple configuration in which only the atmospheric pressure sensor is attached.

  The bed with a side fence according to the present invention includes the above side fence.

  According to this configuration, the vertical movement of the side fence can be detected with a simple configuration.

  In the bed with a side fence according to the present invention, the first position of the side fence is at a position above the mat upper surface to be landed, and the second position is at a position below the mat upper surface. Features.

  Since the movement of the side fence is large and the second position is below the top surface of the mat, according to the configuration provided with the above-described side fence position detection device, there is a risk of falling from the bed of the landing person. Can be detected.

  According to the present invention, the air pressure sensor for detecting the air pressure at the height position of the side fence, and the determining means for determining the vertical movement of the side fence from the output data from the pressure sensor, the height of the side fence of the bed is provided. By discriminating the position change from the output data of the atmospheric pressure sensor, it is possible to provide a side fence position detection device that can detect the vertical movement of the side fence with a simple configuration in which only the atmospheric pressure sensor is attached.

  Moreover, according to this invention, the side fence which can detect a vertical motion can be provided by the simple structure to which only the atmospheric pressure sensor was attached by discriminating the change of a height position from the output data of an atmospheric pressure sensor.

  Further, according to the present invention, it is possible to provide a bed with a side fence that can detect the vertical movement of the side fence with a simple configuration by discriminating the height position change of the side fence from the output data of the atmospheric pressure sensor.

It is a block diagram which shows the side fence position detection apparatus of 1st Embodiment of this invention. It is an external view which shows the side fence of 1st Embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is an external view which shows the bed of 1st Embodiment of this invention, (a) is explanatory drawing in which a side fence is in a 1st position, (b) is explanatory drawing in which a side fence is in a 2nd position. is there. It is a flowchart which shows the procedure which discriminate | determines the vertical motion of a side fence in the discrimination | determination means of 1st Embodiment. It is a block diagram which shows the side fence position detection apparatus of 2nd Embodiment of this invention. It is a flowchart which shows the procedure which discriminate | determines the vertical motion of a side fence in the discrimination | determination means of 2nd Embodiment. It is a block diagram which shows the side fence position detection apparatus of 3rd Embodiment of this invention. It is a flowchart which shows the procedure which discriminate | determines the vertical motion of a side fence in the discrimination | determination means of 3rd Embodiment. It is a block diagram which shows the side fence position detection apparatus of 4th Embodiment of this invention. It is a flowchart which shows the procedure which discriminate | determines the vertical motion of a side fence in the discrimination | determination means of 4th Embodiment. It is the figure which connected the magnet switch in parallel to the conventional nurse call, and was attached to the bed fence.

  Embodiments of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
The first embodiment of the present invention will be described below. FIG. 1 is a block diagram illustrating a side fence position detection device 1 according to the first embodiment. FIG. 2 is an outline view showing the side fence 6 according to the first embodiment of the present invention. FIG. 3 is an outline view showing the bed 5 according to the first embodiment of the present invention. FIG. 3A is an explanatory view in which the side fence 6 is at the first position P1, and FIG. It is explanatory drawing in which the fence 6 exists in the 2nd position P2. FIG. 4 is a flowchart showing a procedure for discriminating the vertical movement of the side fence 6 in the discrimination means 21 of the side fence position detection device 1 of the first embodiment.

  As shown in FIG. 1, the side fence position detection device 1 includes an atmospheric pressure sensor 10 and a determination unit 21 that determines the vertical movement of the side fence 6 based on output data from the atmospheric pressure sensor 10. The determination unit 21 includes a data processing unit 31 and an alarm transmission unit 41.

  The atmospheric pressure sensor 10 includes a sensor unit 11 whose electrical characteristics change due to atmospheric pressure, a measurement circuit unit 12 that converts electrical characteristics of the sensor unit 11 into output data, a transmission circuit unit 13 that transmits output data, and a power source unit 14. Yes. The transmission circuit unit 13 has a built-in wireless communication circuit based on the wireless communication standard.

  The sensor unit 11 includes a diaphragm that provides a cavity in a silicon substrate and isolates the cavity from outside air. A pressure sensitive element called a piezoresistive element is formed on the diaphragm. The hollow portion is in a vacuum state in which the pressure is sufficiently reduced compared to the atmospheric pressure (1 atm). For this reason, the diaphragm is deformed by a pressure difference between the cavity and the external air, and a resistance change of the piezoresistive element is caused due to the deformation. That is, the air pressure (atmospheric pressure) in the sensor unit 11 can be measured as a resistance change with reference to the vacuum.

  The measurement circuit unit 12 converts the resistance change of the piezoresistive element into a voltage, and further converts it into a digital signal based on a predetermined digital signal standard. Further, the output data of the atmospheric pressure sensor 10 converted into a digital signal is transmitted by the transmission circuit unit 13 as a wireless signal based on the wireless communication standard. The power supply unit 14 supplies power necessary for the above operation by a battery.

  The data processing unit 31 of the determination unit 21 performs signal processing on the reception circuit unit 31a that receives the output data transmitted by the transmission circuit unit 13, the storage unit 31b that stores the output data, and the output data that is stored in the storage unit 31b. The signal processing unit 31c and the determination unit 31d that compares the change amount of the atmospheric pressure per predetermined time obtained by the signal processing in the signal processing unit 31c with a threshold value stored in advance. The reception circuit unit 31a includes a wireless communication circuit based on a wireless communication standard corresponding to the transmission circuit unit 13. Thus, a wireless signal is transmitted from the transmission circuit unit 13 to the reception circuit unit 31a by wireless communication.

  The discriminating means 21 generates an alarm from the alarm transmission unit 41 according to the state of the determination unit 31 d of the data processing unit 31. The alarm transmission unit 41 includes an alarm voice unit 41a and an alarm display unit 41b, and generates an alarm by voice and an alarm by display. In the side fence position detection device 1 of the present embodiment, the determination means 21 can be disposed at a position away from the position where the atmospheric pressure sensor 10 is disposed. The determination means 21 may be provided with a battery or the like, but is supplied with electric power from commercial power.

<Side fence>
As shown in FIG. 2, the side fence 6 of the present embodiment is one in which a barometric sensor 10 is attached to a fence-like structural material 6 a.

  As shown in FIG. 2, the side fence 6 has an atmospheric pressure sensor 10 fixed to the upper part 6b of the structural member 6a, and a mounting part 6d at the lower part 6c. The structural member 6a is rotated by a rotation operation using the mounting portion 6d as a fulcrum, and at this time, the height position of the atmospheric pressure sensor 10 is moved up and down.

  In the present embodiment, the discriminating means 21 is arranged at a position away from the side fence 6 separately from the side fence 6 where the atmospheric pressure sensor 10 is arranged on the structural member 6a. Output data is transmitted between the atmospheric pressure sensor 10 and the determination means 21 by wireless communication. The atmospheric pressure sensor 10 has a built-in power supply unit 14 including a battery, and wiring is unnecessary.

  In the present embodiment, the structural material 6a can be made of metal. In particular, a metal such as iron that affects the magnetic force may be used. The structural material 6a may be made of a synthetic resin or a composite material obtained by mixing a metal or an inorganic compound with a synthetic resin.

  Note that the shape of the side fence 6 and the vertical movement method are not limited to those described in the present embodiment. You may attach the atmospheric | air pressure sensor 10 to the existing side fence which can be moved up and down. Since the pressure sensor 10 is a single unit and does not assume contact with an object to be detected unlike a switch, any side fence can be attached, and any position that moves up and down as the side fence moves up and down. For example, the mounting position is not limited. As for the fixing method, as long as the measurement portion of the atmospheric pressure sensor 10 is exposed, it may be screwed or bonded, and may be installed so as not to be pinched or removed by a magnet.

<Bed with side fence>
As shown in FIG. 3A, the bed 5 of the present embodiment is configured such that a side fence 6 having an atmospheric pressure sensor 10 attached to an upper portion 6b is installed along an edge on the longitudinal side of the bed frame. Since the person who has landed on the bed 5 has landed on the mat 7, the side fence 6 protrudes to a position higher than the mat upper surface 7 a of the mat 7 so that the person who falls on the floor will not fall.

  As shown in FIG. 3A, the side fence 6 has an upper portion 6b located above the mat upper surface 7a of the mat 7, and this height position is defined as a first position P1. As shown in FIG. 3 (b), the side fence 6 can move the upper part 6b to a position below the mat upper surface 7a of the mat 7 by the rotation operation with the mounting part 6d as a fulcrum. The position P2 is 2. Thereby, the side fence 6 can be moved up and down between the first position P1 and the second position P2 lower than the first position P1.

  The atmospheric pressure sensor 10 detects the pressure of air at the height position where it is attached. In the present embodiment, since the atmospheric pressure sensor 10 is attached to the upper part 6b, the first position P1 and the height of the second position P2 lower than the first position P1 by the rotation operation with the attaching part 6d as a fulcrum. Between the positions, the height position of the barometric sensor changes. For example, under conditions of atmospheric pressure and temperature called standard atmosphere, the atmospheric pressure changes by 0.01 hPa when the height position changes by about 80 mm. That is, if the measurement resolution of the atmospheric pressure sensor 10 is about 0.01 hPa, a height change of several hundred mm can be reliably detected.

  The vertical movement of the side fence 6 is not limited to the folding type that rotates as shown in FIG. 3B, but can be moved up and down between the first position and the second position lower than the first position. Can be done. For example, it may be a vertical slide type or a retractable type that is housed in the internal space of the bed frame. Further, the structure may be devised so that the height position changes when the side rail is removed in a detachable manner or when the removed side rail is temporarily placed.

<First determination method>
The discriminating means 21 of the side fence position detecting device 1 of the present embodiment uses the first discrimination method of the following procedure from the output data from the atmospheric pressure sensor 10 as shown in the flowchart of FIG. Determine the behavior.

  When power is supplied from the power supply unit 14 to the sensor unit 11, the measurement circuit unit 12, and the transmission circuit unit 13, output data from the atmospheric pressure sensor 10 is transmitted. The data processing unit 31 of the determination unit 21 receives the transmitted output data by the reception circuit unit 31a and holds the received output data in the storage unit 31b (S11).

  Since transmission / reception is repeated at predetermined time intervals, a series of output data is acquired. In the signal processing unit 31c, the series of output data is signal-processed, and the change amount D1 of the atmospheric pressure per predetermined time is calculated (S12).

  A threshold T11 is stored in the storage unit 31b in advance. The determination unit 31d compares the change amount D1 of the atmospheric pressure per predetermined time obtained by the signal processing in the signal processing unit 31c with the threshold T10 (S13).

  The determination unit 31d of the determination unit 21 determines that the side fence 6 has been moved up and down when the absolute value of the atmospheric pressure change amount D1 per predetermined time exceeds the absolute value of the threshold T10 (S14).

  The change in atmospheric pressure due to the vertical movement of the side fence 6 (the change in atmospheric pressure accompanying the change in height) is abrupt. An abrupt atmospheric pressure change point due to the vertical movement of the side fence 6 can be found by obtaining the change amount D1 of the atmospheric pressure per predetermined time and checking whether the magnitude (absolute value) is larger than the threshold value T10. Therefore, it is possible to accurately detect the vertical movement of the side fence 6 based on the wind and temperature.

  When the absolute value of the atmospheric pressure change amount D1 per predetermined time exceeds the absolute value of the threshold value T10, the alarm transmission unit 41 generates a sound alarm and a display alarm (S15).

  After the alarm transmission unit 41 generates an alarm, the alarm is reset when a predetermined operation is performed by an operator (nurse or related person).

  When the absolute value of the atmospheric pressure change amount D1 per predetermined time is less than the threshold value T10, the signal processing for calculating the atmospheric pressure change amount D1 per predetermined time is repeated at the next signal processing timing.

  Depending on the environment in which the atmospheric pressure sensor 10 is installed, a change in atmospheric pressure or temperature, an influence of wind, or the like is detected as a slow fluctuation in output data. Further, measurement variations in piezoresistive elements and circuits included in output data are detected as fluctuations in output data in a short time. In the case of the vertical movement of the side fence 6 which is the object of the present embodiment, the behavior of the change is different from the fluctuation of the output data. Due to this difference, an abrupt pressure change point due to the vertical movement of the side fence 6 can be found by the above-described determination method.

  Hereinafter, the effect by having set it as this embodiment is demonstrated. The side fence position detection device 1 of the present embodiment can move up and down between a first position P1 installed along an edge on the longitudinal side of the bed 5 and a second position P2 lower than the first position P1. An atmospheric pressure sensor 10 that detects the atmospheric pressure at the height position of the side fence 6 is attached to the side fence 6. And the discrimination means 21 which discriminate | determines the up-and-down movement of the side fence 6 from the output data from the atmospheric pressure sensor 10 is provided. According to this configuration, by detecting the height position change of the side fence 6 of the bed 5 from the output data of the atmospheric pressure sensor 10, the vertical movement of the side fence 6 is detected with a simple configuration in which only the atmospheric pressure sensor 10 is attached. it can. In addition, since there is no other member required other than the pressure sensor 10 that operates alone, there is a degree of freedom in designing the side surface of the side fence 6 or the bed frame of the bed 5, and a position required when combining a plurality of members. It can be installed with a simple configuration with less adjustments and the like.

  In addition, when the absolute value of the change amount D1 of the atmospheric pressure per predetermined time calculated from the output data from the atmospheric pressure sensor 10 exceeds the absolute value of the threshold value T10, the determination means 21 has been moved up and down. A data processing unit 31 for determining is provided. The pressure change due to the vertical movement of the side fence 6 is abrupt. According to the above configuration, the pressure change amount D1 per predetermined time is obtained, and it is determined whether or not the magnitude is larger than a predetermined value. Therefore, it is possible to accurately detect the vertical movement of the side fence 6 without being influenced by wind or temperature.

  Moreover, when the discrimination | determination means 21 discriminate | determines that the vertical movement of the side fence 6 was performed, the alarm transmission part 41 which issues an alarm is provided. According to this configuration, the alarm transmitter 41 is provided, so that the side fence 6 is moved up and down, and there is a risk of falling from the bed 5 of the landing person and the possibility of leaving the floor. And related parties.

  The side fence 6 of this embodiment can be moved up and down between a first position P1 installed along the longitudinal edge of the bed 5 and a height position of a second position P2 lower than the first position P1. And it is characterized by having an atmospheric pressure sensor 10 for detecting the atmospheric pressure at the height position. According to this configuration, by determining the change in the height position from the output data of the atmospheric pressure sensor 10, it is possible to detect vertical movement with a simple configuration in which only the atmospheric pressure sensor 10 is attached.

  The bed 5 of the present embodiment is characterized by including the side fence 6 described above. According to this configuration, the vertical movement of the side fence 6 can be detected with a simple configuration.

  In the bed 5 of the present embodiment, the first position P1 of the side fence 6 is above the mat upper surface 7a of the mat 7 to be landed, and the second position P2 is lower than the mat upper surface 7a of the mat 7. It is in the position of. Since the movement of the side fence 6 is large and the second position is below the mat upper surface 7a of the mat 7, according to the configuration including the side fence position detection device 1 described above, the bed 5 of the landing person The risk of falling from can be detected.

[Second Embodiment]
Hereinafter, a second embodiment of the present invention will be described. FIG. 5 is a block diagram showing the side fence position detection device 2 of the second embodiment. FIG. 6 is a flowchart showing a procedure for discriminating the vertical movement of the side fence 6 in the discrimination means 22 of the side fence position detecting device 2 of the second embodiment.

  As shown in FIG. 5, the side fence position detection device 2 includes an atmospheric pressure sensor 10 and a determination unit 22 that determines vertical movement of the side fence 6 based on output data from the atmospheric pressure sensor 10. The determination unit 22 includes a data processing unit 32 and an alarm transmission unit 42. The first embodiment is the same as the first embodiment except that the determination means 22 is different, and the same reference numerals are used for the atmospheric pressure sensor 10, the side fence 6, and the bed 5, and the description is omitted.

  In the side fence 6 and the bed 5 of the present embodiment, the discriminating means 22 is arranged at a position away from the side fence 6 apart from the side fence 6 where the atmospheric pressure sensor 10 is arranged. Output data is transmitted between the atmospheric pressure sensor 10 and the discrimination means 22 by wireless communication.

  The data processing unit 32 of the determination unit 22 performs signal processing on the reception circuit unit 32a that receives the output data transmitted by the transmission circuit unit 13, the storage unit 32b that stores the output data, and the output data that is stored in the storage unit 32b. The signal processing unit 32c has a determination unit 32d that compares the amount of change in atmospheric pressure per predetermined time obtained by signal processing in the signal processing unit 32c with a threshold value stored in advance. The reception circuit unit 32a includes a wireless communication circuit based on a wireless communication standard corresponding to the transmission circuit unit 13. Thus, a wireless signal is transmitted from the transmission circuit unit 13 to the reception circuit unit 32a by wireless communication.

  The determination unit 22 generates an alarm from the alarm transmission unit 42 according to the state of the determination unit 32 d of the data processing unit 32. The alarm transmission unit 42 includes an alarm voice unit 42a and an alarm display unit 42b, and generates a voice alarm and a display alarm.

<Second determination method>
The discriminating means 22 of the side fence position detecting device 2 according to the present embodiment uses the second discrimination method of the following procedure from the output data from the barometric pressure sensor 10 as shown in the flowchart of FIG. Determine the behavior.

  When power is supplied from the power supply unit 14 to the sensor unit 11, the measurement circuit unit 12, and the transmission circuit unit 13, output data from the atmospheric pressure sensor 10 is transmitted. The data processing unit 32 of the determination unit 22 receives the transmitted output data by the reception circuit unit 32a, and holds the received output data in the storage unit 32b (S21).

  Since transmission / reception is repeated at predetermined time intervals, a series of output data is acquired. In the signal processing unit 32c, a series of output data is signal-processed, and a change amount D2 of atmospheric pressure per predetermined time is calculated (S22).

  The storage unit 32b stores a first threshold value T21 and a second threshold value T22 in advance. The determination unit 32d compares the atmospheric pressure change amount D2 per predetermined time obtained by the signal processing in the signal processing unit 32c with the first threshold T21 and the second threshold T22 (S23).

  In the determination unit 32d of the data processing unit 32 in the determination unit 22, it is determined whether or not the side fence 6 has been lifted by comparing the atmospheric pressure change amount D2 per predetermined time with the first threshold value T21. It is determined whether or not the side fence 6 has been lowered by comparing with the second threshold T22 (S24).

  Both the ascending operation and the descending operation of the side fence 6 are more rapid changes than atmospheric pressure changes due to wind and temperature, but the direction of the operation is different. Also, due to the influence of gravity, it is thought that the operating speed is also different. According to the above configuration, it is possible to determine whether the side fence 6 is moving up or the side fence 6 is moving down by setting a threshold value for each operation with respect to the amount of change in atmospheric pressure per predetermined time. Yes. Therefore, it is possible to accurately detect the vertical movement of the side fence 6 based on the wind and temperature.

  When the atmospheric pressure change amount D2 per predetermined time exceeds the first threshold value T21, or when the atmospheric pressure change amount D2 per predetermined time value is a negative value and exceeds the second threshold value T22 as a negative value, an alarm is transmitted. The unit 42 generates a sound alarm and a display alarm (S25).

  After the alarm transmitter 42 generates an alarm, the alarm is reset when a predetermined operation is performed by an operator (nurse or related person).

  When the atmospheric pressure change amount D2 per predetermined time is a value between the first threshold value T21 and the second threshold value T22, the atmospheric pressure change amount D2 per predetermined time is calculated at the next signal processing timing. Repeat signal processing.

  Depending on the environment in which the atmospheric pressure sensor 10 is installed, a change in atmospheric pressure or temperature, an influence of wind, or the like is detected as a slow fluctuation in output data. Further, measurement variations in piezoresistive elements and circuits included in output data are detected as fluctuations in output data in a short time. In the case of the vertical movement of the side fence 6 which is the object of the present embodiment, the behavior of the change is different from the fluctuation of the output data. Due to this difference, an abrupt pressure change point due to the vertical movement of the side fence 6 can be found by the above-described determination method.

  Hereinafter, the effect by having set it as this embodiment is demonstrated. In the side fence position detection device 2 of the present embodiment, the determination means 22 has a first threshold T21 and a second threshold T22. Then, it is determined whether or not the side fence 6 has been lifted by comparing the change D2 in the atmospheric pressure per predetermined time calculated from the output data from the atmospheric pressure sensor 10 with the first threshold value T21. A data processing unit 32 is provided for determining whether or not the side fence 6 has been lowered by comparing with the threshold value T22. Both the ascending operation and the descending operation of the side fence 6 are more rapid changes than atmospheric pressure changes due to wind and temperature, but the direction of the operation is different. Also, due to the influence of gravity, it is thought that the operating speed is also different. According to the above configuration, it is possible to determine whether the side fence 6 is moving up or the side fence 6 is moving down by setting a threshold value for each operation with respect to the amount of change in atmospheric pressure per predetermined time. Yes.

  Moreover, the discrimination | determination means 22 is provided with the warning transmission part 42 which issues a warning, when it determines with the side fence 6 having moved up and down. According to this configuration, since the alarm transmitter 42 is provided, the side fence 6 is moved up and down, and there is a risk of falling from the bed 5 of the landing person and the possibility of leaving the floor. And related parties.

  If it is determined that the side fence 6 has been lifted by comparing the atmospheric pressure change amount D2 per predetermined time with the first threshold value T21, an alarm is not generated and the second threshold value T22 is set. An alarm may be generated when it is determined by comparison that the lowering operation of the side fence 6 has been performed. In this way, the side fence 6 is lowered, and the nurses and related persons can know that the danger of falling from the bed 5 of the landing person and the possibility of getting out are obvious.

[Third Embodiment]
Hereinafter, a third embodiment of the present invention will be described. FIG. 7 is a block diagram showing the side fence position detection device 3 of the third embodiment. FIG. 8 is a flowchart showing a procedure for discriminating the vertical movement of the side fence 6 in the discrimination means 23 of the side fence position detecting device 3 of the third embodiment.

  As shown in FIG. 7, the side fence position detection device 3 includes an atmospheric pressure sensor 10 and a determination unit 23 that determines the vertical movement of the side fence 6 based on output data from the atmospheric pressure sensor 10. The determination unit 23 includes a data processing unit 33 and an alarm transmission unit 43. In addition, it is the same as 1st Embodiment except the discrimination | determination means 23 differs, and uses the same code | symbol about the atmospheric | air pressure sensor 10, the side fence 6, and the bed 5, and omits description.

  In the side fence 6 and the bed 5 of the present embodiment, the discriminating means 23 is arranged at a position away from the side fence 6 apart from the side fence 6 where the atmospheric pressure sensor 10 is arranged. Output data is transmitted between the atmospheric pressure sensor 10 and the discrimination means 23 by wireless communication.

  The data processing unit 33 of the determination unit 23 performs signal processing on the reception circuit unit 33a that receives the output data transmitted by the transmission circuit unit 13, the storage unit 33b that stores the output data, and the output data that is stored in the storage unit 33b. It has the determination part 33d which compares the time differential value obtained by the signal processing in the signal processing part 33c and the signal processing part 33c with the threshold value stored beforehand. The reception circuit unit 33a includes a wireless communication circuit based on a wireless communication standard corresponding to the transmission circuit unit 13. Thus, a wireless signal is transmitted from the transmission circuit unit 13 to the reception circuit unit 33a by wireless communication.

  The determination unit 23 generates an alarm from the alarm transmission unit 43 according to the state of the determination unit 33 d of the data processing unit 33. The alarm transmission unit 43 includes an alarm sound unit 43a and an alarm display unit 43b, and generates a sound alarm and a display alarm.

<Third determination method>
The discriminating means 23 of the side fence position detecting device 3 of the present embodiment uses the third discrimination method of the following procedure from the output data from the barometric pressure sensor 10 as shown in the flowchart of FIG. Determine the behavior.

  When power is supplied from the power supply unit 14 to the sensor unit 11, the measurement circuit unit 12, and the transmission circuit unit 13, output data from the atmospheric pressure sensor 10 is transmitted. The data processing unit 33 of the determination unit 23 receives the transmitted output data by the reception circuit unit 33a, and holds the received output data in the storage unit 33b (S31).

  Since transmission / reception is repeated at predetermined time intervals, a series of output data is acquired. In the signal processing unit 33c, a series of output data is subjected to signal processing, the output data is time differentiated, and an absolute value of the time differential value D3 is calculated (S32).

  The storage unit 33b stores a threshold value T31 in advance. The determination unit 33d compares the absolute value of the time differential value D3 obtained by the signal processing in the signal processing unit 33c with the absolute value of the threshold T31 (S33).

  The determination unit 33d of the determination unit 23 determines that the side fence 6 has been moved up and down when the absolute value of the time differential value D3 exceeds the absolute value of the threshold T30 (S34).

  The change in atmospheric pressure due to the vertical movement of the side fence 6 (the change in atmospheric pressure accompanying the change in height) is abrupt. The output data from the barometric pressure sensor 10 is time-differentiated, and a sudden pressure change point due to the vertical movement of the side fence 6 is found by checking whether or not the magnitude (absolute value) of the time differential value D3 is larger than the threshold value T30. be able to. Therefore, it is possible to accurately detect the vertical movement of the side fence 6 based on the wind and temperature.

  When the absolute value of the time differential value D3 exceeds the absolute value of the threshold value T30, the alarm transmission unit 43 generates a sound alarm and a display alarm (S35).

  After the alarm transmission unit 43 generates an alarm, the alarm is reset when a predetermined operation is performed by an operator (nurse or related person).

  When the absolute value of the time differential value D3 is less than the threshold value T30, the signal processing for calculating the absolute value of the time differential value D3 is repeated at the next signal processing timing.

  Depending on the environment in which the atmospheric pressure sensor 10 is installed, a change in atmospheric pressure or temperature, an influence of wind, or the like is detected as a slow fluctuation in output data. Further, measurement variations in piezoresistive elements and circuits included in output data are detected as fluctuations in output data in a short time. In the case of the vertical movement of the side fence 6 which is the object of the present embodiment, the behavior of the change is different from the fluctuation of the output data. Due to this difference, an abrupt pressure change point due to the vertical movement of the side fence 6 can be found by the above-described determination method.

  Hereinafter, the effect by having set it as this embodiment is demonstrated. In the side fence position detection device 3 of the present embodiment, the discrimination means 23 performs time differentiation on the output data from the atmospheric pressure sensor 10, and when the absolute value of the time differentiation value exceeds the absolute value of the predetermined threshold value, the side fence 6 Is provided with a data processing unit 33 that determines that the vertical movement is performed. The pressure change due to the vertical movement of the side fence 6 is abrupt. According to the above configuration, the output data is differentiated with respect to time, and whether or not the absolute value of the time differential value D3 is larger than the absolute value of the threshold value T30 makes it possible to rapidly change the atmospheric pressure due to the vertical movement of the side fence 6. Can be detected, and the vertical movement of the side fence 6 can be detected accurately without being affected by wind and temperature.

  Moreover, when the discrimination | determination means 23 discriminate | determines that the side fence 6 was moved up and down, the alarm transmission part 43 which issues an alarm is provided. According to this configuration, since the alarm transmission unit 43 is provided, the side fence 6 is moved up and down, and there is a risk of falling from the bed 5 of the landing person and the possibility of leaving the floor. And related parties.

[Fourth Embodiment]
The fourth embodiment of the present invention will be described below. FIG. 9 is a block diagram showing the side fence position detection device 4 of the fourth embodiment. FIG. 10 is a flowchart showing a procedure for discriminating the vertical movement of the side fence 6 in the discrimination means 24 of the side fence position detection device 4 of the fourth embodiment.

  As shown in FIG. 9, the side fence position detection device 4 includes an atmospheric pressure sensor 10 and a determination unit 24 that determines the vertical movement of the side fence 6 based on output data from the atmospheric pressure sensor 10. The determination unit 24 includes a data processing unit 34 and an alarm transmission unit 44. The first embodiment is the same as the first embodiment except that the determination means 24 is different, and the same reference numerals are used for the atmospheric pressure sensor 10, the side fence 6, and the bed 5, and the description is omitted.

  In the side fence 6 and the bed 5 of the present embodiment, the discriminating means 24 is arranged at a position away from the side fence 6 apart from the side fence 6 where the atmospheric pressure sensor 10 is arranged. Output data is transmitted between the atmospheric pressure sensor 10 and the determination unit 24 by wireless communication.

  The data processing unit 34 of the determination unit 24 performs signal processing on the reception circuit unit 34a that receives the output data transmitted by the transmission circuit unit 13, the storage unit 34b that stores the output data, and the output data stored in the storage unit 34b. The signal processing unit 34c and the determination unit 34d that compares the time differential value obtained by the signal processing in the signal processing unit 34c with a threshold value stored in advance are provided. The reception circuit unit 34 a includes a wireless communication circuit based on a wireless communication standard corresponding to the transmission circuit unit 13. Thus, a wireless signal is transmitted from the transmission circuit unit 13 to the reception circuit unit 34a by wireless communication.

  The discriminating means 24 generates an alarm from the alarm transmission unit 44 according to the state of the determination unit 34d of the data processing unit 34. The alarm transmission unit 44 includes an alarm audio unit 44a and an alarm display unit 44b, and generates an audio alarm and a display alarm.

<Fourth determination method>
The discriminating means 24 of the side fence position detection device 4 according to the present embodiment uses the output data from the atmospheric pressure sensor 10 and, as shown in the flowchart of FIG. Determine the behavior.

  When power is supplied from the power supply unit 14 to the sensor unit 11, the measurement circuit unit 12, and the transmission circuit unit 13, output data from the atmospheric pressure sensor 10 is transmitted. The data processing unit 34 of the determination unit 24 receives the transmitted output data by the reception circuit unit 34a, and holds the received output data in the storage unit 34b (S41).

  Since transmission / reception is repeated at predetermined time intervals, a series of output data is acquired. In the signal processing unit 34c, a series of output data is subjected to signal processing, the output data is time differentiated, and a time differential value D4 is calculated (S42).

  The storage unit 34b stores a first threshold value T41 and a second threshold value T42 in advance. In the determination unit 34d, the time differential value D4 obtained by the signal processing in the signal processing unit 34c is compared with the first threshold value T41 and the second threshold value T42 (S43).

  The determination unit 34d of the data processing unit 34 in the determination unit 24 determines whether or not the side fence 6 has been lifted by comparing the time differential value D4 with the first threshold value T41, and the second threshold value T42. To determine whether or not the side fence 6 has been lowered (S44).

  Both the ascending operation and the descending operation of the side fence 6 are more rapid changes than atmospheric pressure changes due to wind and temperature, but the direction of the operation is different. Also, due to the influence of gravity, it is thought that the operating speed is also different. According to the above configuration, it is possible to determine whether the side fence 6 is moving up or the side fence 6 is moving down by setting a threshold value for each operation with respect to the amount of change in atmospheric pressure per predetermined time. Yes. Therefore, it is possible to accurately detect the vertical movement of the side fence 6 based on the wind and temperature.

  When the time differential value D4 exceeds the first threshold value T41, or when the time differential value D4 is a negative value and exceeds the second threshold value T42 as a negative value, the alarm transmission unit 44 uses an alarm and display by voice. An alarm is generated (S45).

  After the alarm transmission unit 44 generates an alarm, the alarm is reset when a predetermined operation is performed by an operator (nurse or related person).

  When the time differential value D4 is a value between the first threshold value T41 and the second threshold value T42, the signal processing for calculating the time differential value D4 is repeated at the next signal processing timing.

  Depending on the environment in which the atmospheric pressure sensor 10 is installed, a change in atmospheric pressure or temperature, an influence of wind, or the like is detected as a slow fluctuation in output data. Further, measurement variations in piezoresistive elements and circuits included in output data are detected as fluctuations in output data in a short time. In the case of the vertical movement of the side fence 6 which is the object of the present embodiment, the behavior of the change is different from the fluctuation of the output data. Due to this difference, an abrupt pressure change point due to the vertical movement of the side fence 6 can be found by the above-described determination method.

  Hereinafter, the effect by having set it as this embodiment is demonstrated. In the side fence position detection device 4 of the present embodiment, the discriminating means 24 has a first threshold value T41 and a second threshold value T42, time-differentiated the output data from the atmospheric pressure sensor 10, and the time differential value D4 and the first value It is determined whether or not the side fence 6 has been raised by comparing it with the threshold value T41 of 1, and the side fence 6 is lowered by comparing the time differential value D4 with the second threshold value T42. A data processing unit 34 is provided for determining whether or not an error has occurred. Both the ascending operation and the descending operation of the side fence 6 are more rapid changes than atmospheric pressure changes due to wind and temperature, but the direction of the operation is different. Also, due to the influence of gravity, it is thought that the operating speed is also different. According to said structure, it can discriminate | determine whether it is the raising operation | movement of the side fence 6 or the lowering action of the side fence 6 by setting the threshold value of each operation | movement with respect to the time differential value D4.

  The discriminator 24 includes an alarm transmitter 44 that issues an alarm when it is determined that the side fence 6 has been moved up and down. According to this configuration, since the alarm transmission unit 44 is provided, the side fence 6 is moved up and down, and there is a risk of falling from the bed 5 with the side fence of the landing person and the possibility of leaving the floor. , Nurses and people concerned can know.

  When it is determined that the side fence 6 has been lifted by comparing the time differential value D4 with the first threshold value T41, an alarm is not generated and the side threshold value 42 is compared with the second threshold value T42. An alarm may be generated when it is determined that the lowering operation of the fence 6 has been performed. In this way, the side fence 6 is lowered, and the nurses and related persons can know that the danger of falling from the bed 5 of the landing person and the possibility of getting out are obvious.

  As described above, the side fence position detection device, the side fence, and the bed with the side fence according to the embodiment of the present invention have been specifically described. However, the present invention is not limited to the above embodiment, and departs from the gist. Various modifications can be made without departing from the scope. For example, the present invention can be modified as follows, and these also belong to the technical scope of the present invention.

  (1) In the present embodiment, the side fence position detection device may be one in which the discrimination means is attached to the side fence or the bed.

  (2) In the present embodiment, the atmospheric pressure sensor and the determination unit transmit and receive signals by wireless communication. However, signals may be transmitted and received by wired connection or optical communication. In this way, noise propagation to the medical device that is a concern in the case of wireless communication is suppressed.

  (3) In the present embodiment, the determination means includes the data processing unit and the alarm generation unit. However, the alarm generation unit of another device may be used. For example, an alarm signal based on the determination result may be connected in parallel to the nurse call switch signal by connecting to an existing nurse call such as a hospital. In this way, when a side fence position detection device is provided in a plurality of beds as in a hospital or the like, the side fence position detection device connected to the nurse call switch corresponding to each bed does not require an alarm generation unit, and which bed It is also possible to easily discriminate whether it is an alarm.

  (4) In the present embodiment, a plurality of atmospheric pressure sensors (wireless communication or wired) may be connected to one determination unit. For example, when two side rails are provided on each of the longitudinal sides of one bed frame, output data from four barometric pressure sensors can be subjected to parallel signal processing by one determination means. In this way, even if only one side fence is moved up and down, it can be detected in the same manner.

  (5) In this embodiment, the predetermined time interval for acquiring the output data of the barometric sensor is extremely shorter than the time required for the vertical movement of the side fence, and noise reduction processing is performed when a series of output data is signal-processed. It is preferable to have. In this way, noise fluctuations that are much shorter than the time required for the side fence to move up and down are reduced, and changes in pressure due to vertical movement of the side fence that are different from long-term changes due to the effects of wind and temperature are accurate. Can be detected well.

1, 2, 3, 4 Side fence position detection device 5 Bed 6 Side fence 6a Structural material 6b Upper part 6c Lower part 6d Mounting part 7 Mat 7a Mat upper surface 10 Atmospheric pressure sensor 11 Sensor part 12 Measurement circuit part 13 Transmission circuit part 14 Power supply part 21 22, 23, 24 Discriminating means 31, 32, 33, 34 Data processing unit 31a, 32a, 33a, 34a Reception circuit unit 31b, 32b, 33b, 34b Storage unit 31c, 32c, 33c, 34c Signal processing unit 31d, 32d , 33d, 34d determination unit 41, 42, 43, 44 Alarm transmission unit 41a, 42a, 43a, 44a Alarm sound unit 41b, 42b, 43b, 44b Alarm display unit

Claims (9)

Attached to a side fence that can move up and down between a first position installed along an edge on the longitudinal side of the bed and a second position that is lower than the first position, and an air pressure at a height position of the side fence An atmospheric pressure sensor for detecting
A side fence position detecting device comprising: a discriminating means for discriminating vertical movement of the side fence from output data from the atmospheric pressure sensor.   The determination means determines that the side fence has been moved up and down when the absolute value of the change amount of the atmospheric pressure per predetermined time calculated from the output data from the atmospheric pressure sensor exceeds the absolute value of a predetermined threshold value. The side fence position detection device according to claim 1, further comprising a data processing unit.   The discriminating means has a first threshold value and a second threshold value, and compares the change amount of the atmospheric pressure per predetermined time calculated from the output data from the atmospheric pressure sensor with the first threshold value, thereby comparing the side fence. 2. The data processing unit according to claim 1, further comprising: a data processing unit that determines whether or not a lifting operation has been performed, and that determines whether or not a side rail lowering operation has been performed by comparing with the second threshold value. The side fence position detection apparatus of description.   The determining means time-differentiates the output data from the barometric sensor, and determines that the side fence has been moved up and down when the absolute value of the time differential value exceeds the absolute value of a predetermined threshold value. The side fence position detection device according to claim 1, comprising:   The discriminating means has a first threshold value and a second threshold value, performs time differentiation on the output data from the atmospheric pressure sensor, and compares the time differential value with the first threshold value to raise the side fence. And a data processing unit for determining whether or not the side fence has been lowered by comparing the time differential value with the second threshold value. The side fence position detection apparatus according to claim 1.   The side fence position detection device according to any one of claims 1 to 5, wherein the discrimination means includes an alarm transmission unit that issues an alarm when it is determined that the side fence has been moved up and down.   It is possible to move up and down between a first position installed along an edge on the longitudinal side of the bed and a height position of a second position lower than the first position, and detects an atmospheric pressure at the height position. A side fence characterized by having an atmospheric pressure sensor.   A bed with a side fence comprising the side fence according to claim 7. The said 1st position of the said side fence exists in the position above the mat | matte upper surface to land, and the said 2nd position exists in a position below the said mat | matte upper surface. Bed with side fence.

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