JP2011130827A - On-bed state determination device - Google Patents

On-bed state determination device Download PDF

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JP2011130827A
JP2011130827A JP2009290862A JP2009290862A JP2011130827A JP 2011130827 A JP2011130827 A JP 2011130827A JP 2009290862 A JP2009290862 A JP 2009290862A JP 2009290862 A JP2009290862 A JP 2009290862A JP 2011130827 A JP2011130827 A JP 2011130827A
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bed
support
center
person
gravity
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JP5593692B2 (en
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Kenji Torii
研二 鳥井
Shigehisa Suetsugu
恵久 末次
Mitsuhiro Ando
充宏 安藤
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Aisin Corp
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Aisin Seiki Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an on-bed state determination device easily applicable to the bedding part of a different size and accurately determining the on-bed state of a person on the bedding part of a bed even when the bedding part is extended to the outer side of the support part of the bed. <P>SOLUTION: The on-bed state determination device 20 is provided on the bed 10 including the bedding part 11 and support parts 12-15 provided on the bedding part 11 to support the bedding part 11. The on-bed state determination device 20 includes: load detection means 21-24 for detecting loads put on the support parts 12-15; a support part distance measuring means 25 provided in the load detection means 21, for measuring a support part distance L<SB>1</SB>to the support part 13; a centroid position computing means 27 for computing the centroid position W of the person on the bedding part 11 on the basis of the loads put on the support parts 12-15; and a state determination means 28 for determining the state of the person on the bedding part 11 on the basis of the support part distance L<SB>1</SB>and the centroid position W of the person on the bedding part 11. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、ベッドの寝床部上の人の在床状態を判定する在床状態判定装置に関する。   The present invention relates to an in-bed state determination device that determines a bed state of a person on a bed portion of a bed.

ベッドの頭側左部、頭側右部、足側左部、足側右部にそれぞれかかる荷重を、ベッドの四つの脚部に設けられた荷重検出手段により検出し、検出した値が被験者の特定の寝姿に対応する所定の判定式を満足するか判定し、所定の判定式を満足する場合には被験者の在床状況を報知するベッドの在床状況検出方法が開示されている(例えば、特許文献1参照。)。   The load applied to each of the head left side, head right side, foot left side, and foot right side of the bed is detected by load detecting means provided on the four legs of the bed, and the detected value is determined by the subject. There is disclosed a bed presence detection method for determining whether a predetermined judgment formula corresponding to a specific sleeping posture is satisfied, and notifying the subject's presence when the predetermined judgment formula is satisfied (for example, , See Patent Document 1).

また、荷重信号を生成する荷重センサが寝床部を支持するフレームの四隅に備えられ、荷重センサの信号から寝床部上の利用者の体重と重心位置を演算し、利用者の体重が所定の体重閾値以下であるか、また、重心位置が寝床部の監視対象領域(例えば縁部)であるかを判定して警報を発する、離床予測・検知システムを備えた寝台装置が開示されている(例えば、特許文献2参照。)。   In addition, load sensors that generate load signals are provided at the four corners of the frame that supports the bed, and the weight and center of gravity of the user on the bed are calculated from the signals of the load sensor. There is disclosed a bed apparatus equipped with a bed prediction / detection system that issues a warning by determining whether the position is below a threshold and whether the center of gravity position is a monitoring target area (for example, an edge) of the bed (for example, , See Patent Document 2).

特開2007−330659号公報JP 2007-330659 A 特開2007−190269号公報JP 2007-190269 A

しかしながら、特許文献1の在床状況検出方法では、被験者の在床位置がベッド寝床部の端部領域であることを検出するために、各荷重検出手段により検出された荷重の比を演算し、その比が所定の値以下である場合に被験者の在床位置がベッド寝床部の端部領域であると判定するため、ベッド寝床部の大小にかかわらず一定の比で端部領域が決まることになる。よって、寝床部の小さいベッドでは端部領域が小さく設定され、寝床部の大きなベッドでは大きく設定されることになるため、端部領域に存在する被験者がベッド寝床部端から転落等する可能性の度合いが寝床部の大小により相違し、正しい相関が得られないおそれがある。また、大きさの異なる寝床部へ適用する際に寝床部の大きさに応じて判定式の値を設定する場合、その設定の手間が生じる。また、脚部が寝床部端部の位置基準であるため、脚部の外側にベッド寝床部が延在する場合(ベッドの周縁より内側に脚部が配置される場合)には、例えば脚部を結ぶ直線上を縁部として端部領域が設定され、実際にはベッドの周縁から離れたベッド寝床部の内側に存在していたとしても、端部領域に存在すると報知される場合がある。   However, in the occupancy status detection method of Patent Document 1, in order to detect that the subject's occupancy position is the end region of the bed lie, the ratio of the load detected by each load detection means is calculated, When the ratio is less than or equal to a predetermined value, it is determined that the subject's occupancy position is the end region of the bed bed portion, so that the end region is determined by a constant ratio regardless of the size of the bed bed portion. Become. Therefore, the end area is set small in a bed with a small bed, and large in a bed with a large bed, so there is a possibility that a subject present in the end area falls from the bed bed end. The degree varies depending on the size of the bed, and there is a possibility that a correct correlation cannot be obtained. Moreover, when applying to the bed part with which a magnitude | size differs, when setting the value of a determination formula according to the magnitude | size of a bed part, the effort of the setting arises. Moreover, since the leg is the position reference of the end of the bed part, when the bed bed part extends outside the leg part (when the leg part is arranged inside the periphery of the bed), for example, the leg part An end region is set with the straight line connecting the edges as an edge, and even if the end region actually exists inside the bed bed portion away from the peripheral edge of the bed, it may be notified that it exists in the end region.

また、特許文献2の離床予測・検知システムを備えた寝台装置では、あらかじめ寝床部の大きさに応じて監視対象領域の設定を行う必要があり、大きさの異なる寝床部へ適用する際に設定の手間が生じる。   In addition, in the bed apparatus provided with the bed prediction / detection system of Patent Document 2, it is necessary to set the monitoring target area in advance according to the size of the bed part, which is set when applying to a bed part having a different size. The trouble of is generated.

本発明は、上記の問題点に鑑みてなされたものであり、大きさの異なる寝床部に容易に適用でき、ベッドの支持部の外側に寝床部が延在する場合でも、ベッドの寝床部上の人の在床状態を正確に判定できる在床状態判定装置を提供することを課題とする。   The present invention has been made in view of the above problems, and can be easily applied to bed parts of different sizes, and even when the bed part extends outside the bed support part, It is an object of the present invention to provide an in-situ state determination device that can accurately determine the in-situ state of a person.

本発明の第1の課題解決手段は、在床状態判定装置を寝床部と前記寝床部に設けられ床に対して前記寝床部を支持する三つ以上の支持部とを備えたベッドに設置し、在床状態判定装置は、前記支持部の少なくとも二つにかかる荷重を検出する荷重検出手段と、前記荷重検出手段の少なくとも一つに設けられ、他の支持部の少なくとも一つまでの支持部間距離を測定する支持部間距離測定手段と、前記荷重検出手段により検出された前記支持部にかかる荷重に基づいて、前記寝床部上の人の重心位置を演算する重心位置演算手段と、前記支持部間距離測定手段により測定された前記支持部間距離と前記重心位置演算手段により演算された前記寝床部上の人の重心位置とに基づいて前記寝床部上の人の状態を判定する状態判定手段と、を備えることである。   The first problem solving means of the present invention is to install a occupancy state determination device in a bed provided with a bed portion and three or more support portions that are provided on the bed portion and support the bed portion with respect to the floor. The occupancy state determination device includes: a load detection unit that detects a load applied to at least two of the support units; and a support unit that is provided in at least one of the load detection units and up to at least one of the other support units. A distance measurement means between the support parts for measuring the distance between the support parts, a center-of-gravity position calculation means for calculating the center-of-gravity position of the person on the bed based on the load applied to the support part detected by the load detection means, A state of determining the state of the person on the bed based on the distance between the support parts measured by the distance measurement means between the support parts and the position of the center of gravity of the person on the bed calculated by the gravity center position calculation means Determination means It is.

本発明の第2の課題解決手段は、前記荷重検出手段の少なくとも一つに設けられ、支持部−寝床部端間距離を測定する支持部−寝床部端間距離測定手段をさらに備え、前記状態判定手段は、前記支持部間距離測定手段により測定された前記支持部間距離と、前記支持部−寝床部端間距離測定手段により測定された前記支持部−寝床部端間距離と、前記重心位置演算手段により演算された前記寝床部上の人の重心位置と、に基づいて前記寝床部上の人の状態を判定することである。   The second problem-solving means of the present invention is further provided with at least one of the load detecting means, and further comprises a support-bed-end-edge distance measuring means for measuring a distance between the support-bed-end-edges, The determining means includes the distance between the support parts measured by the distance measurement means between the support parts, the distance between the support part and the bed part edge measured by the distance measurement means between the support parts and the bed part, and the center of gravity. And determining the state of the person on the bed based on the position of the center of gravity of the person on the bed calculated by the position calculation means.

本発明の第3の課題解決手段は、在床状態判定装置を寝床部と前記寝床部に設けられ床に対して前記寝床部を支持する三つ以上の支持部とを備えたベッドに設置し、在床状態判定装置は、前記支持部の少なくとも二つにかかる荷重を所定時間ごとに検出する荷重検出手段と、前記支持部の少なくとも一つに設けられ、他の支持部の少なくとも一つまでの支持部間距離を測定する支持部間距離測定手段と、前記荷重検出手段により前記所定時間ごとに検出された前記支持部の少なくとも二つにかかる荷重に基づいて前記寝床部上の人の前記所定時間ごとの重心位置を演算する重心位置演算手段と、前記重心位置演算手段により演算された前記寝床部上の人の前記所定時間ごとの重心位置に基づいて、前記ベッド上の人の重心位置の移動速度を演算する重心位置移動速度演算手段と、前記支持部間距離測定手段により測定された前記支持部間距離と、前記重心位置演算手段により演算された前記寝床部上の人の重心位置と、前記重心位置移動速度演算手段により演算された前記寝床部上の人の重心位置の移動速度とに基づいて、前記寝床部上の人の状態を判定する状態判定手段と、を備えることである。   According to a third problem solving means of the present invention, the occupancy state determination apparatus is installed in a bed provided with a bed portion and three or more support portions that are provided on the bed portion and support the bed portion with respect to the floor. The occupancy state determination device includes a load detection means for detecting a load applied to at least two of the support portions every predetermined time and at least one of the support portions up to at least one of the other support portions. The distance between the support portions of the person on the bed portion based on the load applied to at least two of the support portions detected every predetermined time by the load detection means. Based on the center-of-gravity position of the person on the bed calculated by the center-of-gravity position calculating means, the center-of-gravity position of the person on the bed calculated by the center-of-gravity position calculating means Play the moving speed of The center-of-gravity position moving speed calculating means, the distance between the support parts measured by the distance measurement means between the support parts, the center-of-gravity position of the person on the bed calculated by the center-of-gravity position calculation means, State determining means for determining the state of the person on the bed based on the moving speed of the center of gravity of the person on the bed calculated by the moving speed calculating means.

本発明の第4の課題解決手段は、前記荷重検出手段の少なくとも一つに設けられ、支持部−寝床部端間距離を測定する支持部−寝床部端間距離測定手段をさらに備え、前記状態判定手段は、前記支持部間距離測定手段により測定された前記支持部間距離と、前記支持部−寝床部端間距離測定手段により測定された前記支持部−寝床部端間距離と、前記重心位置演算手段により演算された前記寝床部上の人の重心位置と、前記重心位置移動速度演算手段により演算された前記寝床部上の人の重心位置の移動速度とに基づいて、前記寝床部上の人の状態を判定することである。   The fourth problem-solving means of the present invention further comprises a support-bed-end distance measuring means that is provided in at least one of the load detection means and measures a distance between the support-bed-end-edges, The determining means includes the distance between the support parts measured by the distance measurement means between the support parts, the distance between the support part and the bed part edge measured by the distance measurement means between the support parts and the bed part, and the center of gravity. Based on the center of gravity position of the person on the bed calculated by the position calculating means and the moving speed of the center of gravity position of the person on the bed calculated by the center of gravity position moving speed calculating means, It is to determine the state of the person.

本発明の第5の課題解決手段は、前記状態判定手段により判定された前記寝床部上の人の状態の情報を送信する情報送信手段と、前記情報送信手段により送信された前記寝床部上の人の状態の情報を受信する情報受信手段と、前記情報受信手段に接続され、前記情報受信手段が受信した前記寝床部上の人の状態の情報を表示する表示手段と、を備えることである。   A fifth problem-solving means of the present invention includes information transmitting means for transmitting information on a person's state on the bed determined by the state determining means, and information on the bed transmitted by the information transmitting means. Information receiving means for receiving information on a person's condition; and display means connected to the information receiving means for displaying information on the person's condition on the bed received by the information receiving means. .

本発明によれば、支持部間距離測定手段により支持部間距離が測定され、荷重検出手段により検出された支持部にかかる荷重に基づいて重心位置演算手段により重心位置が演算されるので、支持部と重心位置との位置関係および互いの距離がわかる。よって、例えば、ベッドの寝床部端と、支持部同士を結ぶ直線とが一致又は近接する場合には、寝床部上の人の重心位置とベッド寝床部端との距離がわかる。したがって、状態判定手段による、ベッドの寝床部上の人の状態(寝床部端からの転落等の可能性が高いか否か)の正確な判定が可能である。また、寝床部の大きさの異なるベッドに適用可能である。また、支持部間距離測定手段での測定が容易であるため、利用者や介助者自身が様々なベッドに設置できる。   According to the present invention, the distance between the support parts is measured by the distance measurement means between the support parts, and the center of gravity position is calculated by the gravity center position calculation means based on the load applied to the support part detected by the load detection means. The positional relationship between the part and the center of gravity position and the distance between them can be known. Therefore, for example, when the end of the bed portion of the bed and the straight line connecting the support portions match or approach each other, the distance between the position of the center of gravity of the person on the bed portion and the end of the bed bed portion is known. Therefore, it is possible to accurately determine the state of the person on the bed portion of the bed (whether there is a high possibility of falling from the end of the bed portion) by the state determination means. In addition, the present invention can be applied to beds having different bed size. Moreover, since the measurement by the distance measurement means between support parts is easy, a user and a caregiver can install in various beds.

また、支持部−寝床部端間距離測定手段により支持部−寝床部端間距離が測定されるため、支持部と寝床部端との距離がわかる。よって、寝床部上の人の重心位置と寝床部端との位置関係および互いの距離がわかる。したがって、寝床部が支持部の外側に延在する場合(ベッドの周縁より内側に脚部が配置される場合)にも、状態判定手段による、ベッドの寝床部上の人の状態(寝床部端からの転落等の可能性が高いか否か)の正確な判定が可能である。   Further, since the distance between the support part and the bed part edge is measured by the support part-bed part edge distance measuring means, the distance between the support part and the bed part edge is known. Therefore, the positional relationship between the position of the center of gravity of the person on the bed and the end of the bed and the distance from each other can be known. Therefore, even when the bed portion extends outside the support portion (when the leg portion is arranged inside the periphery of the bed), the state of the person on the bed portion of the bed (the end of the bed portion) is also determined by the state determination means. It is possible to accurately determine whether or not there is a high possibility of falling from the vehicle.

また、状態判定手段が、重心位置移動速度演算手段により演算された寝床部上の人の重心位置の移動速度に基づいて寝床部上の人の状態を判定するため、人の移動を考慮に入れてさらに正確な人の状態の判定が可能である。   In addition, since the state determination means determines the state of the person on the bed based on the movement speed of the center of gravity of the person on the bed calculated by the gravity center position movement speed calculation means, the movement of the person is taken into consideration. Thus, it is possible to more accurately determine the state of a person.

また、情報送信手段により送信された寝床部上の人の状態の情報が情報受信手段により受信され表示手段により表示されるため、ベッドから離れている介助者へベッドの寝床部上の人の状態を報知できる。   Moreover, since the information on the state of the person on the bed transmitted by the information transmitting unit is received by the information receiving unit and displayed on the display unit, the person on the bed part of the bed is notified to the assistant away from the bed. Can be notified.

実施例1に係る在床状態判定装置を適用したベッドを示す斜視図である。It is a perspective view which shows the bed to which the occupancy state determination apparatus which concerns on Example 1 is applied. 実施例1に係る在床状態判定装置のブロック図である。1 is a block diagram of a occupancy state determination device according to Embodiment 1. FIG. 実施例1に係る在床状態判定装置の説明図である。It is explanatory drawing of the occupancy state determination apparatus which concerns on Example 1. FIG. 実施例2に係る在床状態判定装置のブロック図である。FIG. 10 is a block diagram of an in-situ state determination device according to a second embodiment. 実施例2に係る在床状態判定装置の説明図である。It is explanatory drawing of the occupancy state determination apparatus which concerns on Example 2. FIG. 実施例4に係る在床状態判定装置を示すブロック図である。It is a block diagram which shows the occupancy state determination apparatus which concerns on Example 4. FIG.

以下に本発明の実施の形態について、図面を参照しつつ詳細に説明する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

図1は、実施例1に係る在床状態判定装置20を適用したベッド10を示す斜視図である。ベッド10は、寝床部11と、寝床部11に設けられ床に対して寝床部11を支持する四つの支持部(第一支持部12、第二支持部13、第三支持部14、第四支持部15)とを備える。第一支持部12〜第四支持部15は、キャスター、脚、脚に取り付けられたキャスターなどにより構成される。第一支持部12は、ベッド10の寝床部11の、人が仰向けに寝たときの頭側右部(図1の左側手前部)に、第二支持部13は、人が仰向けに寝たときの頭側左部(図1の左側奥部)に、第三支持部14は、人が仰向けに寝たときの足側手前部(図1の右側手前部)に、第四支持部15は、人が仰向けに寝たときの足側左部(図1の右側奥部)に設けられる。   FIG. 1 is a perspective view illustrating a bed 10 to which a bed-floating state determination device 20 according to the first embodiment is applied. The bed 10 includes a bed portion 11 and four support portions (a first support portion 12, a second support portion 13, a third support portion 14, and a fourth support portion provided on the bed portion 11 and supporting the bed portion 11 with respect to the floor). A support 15). The first support part 12 to the fourth support part 15 are configured by casters, legs, casters attached to the legs, and the like. The first support portion 12 is on the right side of the head of the bed portion 11 of the bed 10 when the person lies on his back (the left front side in FIG. 1), and the second support portion 13 is laid on his back. The third support portion 14 is located at the front left portion (right front portion in FIG. 1) when the person lies on his / her back on the left side of the head side (left rear portion in FIG. 1). Is provided on the left side of the foot side when the person sleeps on his back (the back side on the right side in FIG. 1).

図2は、在床状態判定装置20のブロック図である。図3は、実施例1に係る在床状態判定装置20の説明図である。実施例1に係る在床状態判定装置20は、第一支持部12〜第四支持部15にかかる荷重を検出する第一荷重検出手段21〜第四荷重検出手段24と、第一荷重検出手段21に設けられ、第一支持部21から第二支持部22までの第一支持部間距離L(図3)を測定する支持部間距離測定手段25と、第一荷重検出手段21に設けられ、第一支持部12から寝床部11の端までの第一支持部−寝床部端間距離Lを測定する支持部−寝床部端間距離測定手段26と、第一荷重検出手段21〜第四荷重検出手段24により検出された第一支持部12〜第四支持部15にかかる荷重と支持部間距離測定手段25により測定された支持部間距離Lに基づいて寝床部11上の人の重心位置を演算する重心位置演算手段27と、支持部間距離測定手段25により測定された支持部間距離Lと支持部−寝床部端間距離測定手段26により測定された支持部−寝床部端間距離Lと重心位置演算手段27により演算された寝床部11上の人の重心位置とに基づいて寝床部11上の人の状態を判定する状態判定手段28とを備える。 FIG. 2 is a block diagram of the occupancy state determination device 20. FIG. 3 is an explanatory diagram of the occupancy state determination device 20 according to the first embodiment. The occupancy state determination device 20 according to the first embodiment includes a first load detection unit 21 to a fourth load detection unit 24 that detect loads applied to the first support unit 12 to the fourth support unit 15, and a first load detection unit. 21 and provided in the first load detecting means 21 and the inter-support distance measuring means 25 for measuring the first inter-support distance L 1 (FIG. 3) from the first support 21 to the second support 22. is, the first support portion from the first support portion 12 to the end of the bed portion 11 - the support unit to measure the bed portion end distance L 2 - and inter bed portion end distance measuring means 26, the first load detection means 21 to on bed portion 11 on the basis of the first support portion 12 to the fourth supporting portion between the supporting portion is determined by the load and the support portion distance measuring means 25 according to the 15 distance L 1 that is detected by the fourth load detection means 24 Center-of-gravity position calculation means 27 for calculating the center-of-gravity position of a person and distance measurement between support parts Between the support portion was measured by means 25 the distance L 1 and the supporting part - supporting part measured by bed portion end distance measuring means 26 - between bed portion end distance L 2 and bed portion calculated by the center-of-gravity position calculating means 27 11 includes a state determination unit 28 that determines the state of the person on the bed 11 based on the position of the center of gravity of the person on the bed 11.

第一荷重検出手段21〜第四荷重検出手段24はそれぞれ、第一支持部12〜第四支持部15の下に配置される。第一荷重検出手段21〜第四荷重検出手段24は、例えば、圧電素子、ロードセル等により構成される。第一荷重検出手段21〜第四荷重検出手段24の上面には、凹部が設けられ、第一荷重検出手段21〜第四荷重検出手段24の中心に第一支持部12〜第四支持部15が位置するようになっている。第一荷重検出手段21〜第四荷重検出手段24は、あらかじめ、ベッド10の寝床部11上に人が乗っていない状態でオフセットされる。   The first load detection means 21 to the fourth load detection means 24 are respectively disposed below the first support part 12 to the fourth support part 15. The first load detection means 21 to the fourth load detection means 24 are constituted by, for example, a piezoelectric element, a load cell, or the like. A concave portion is provided on the upper surface of the first load detection means 21 to the fourth load detection means 24, and the first support part 12 to the fourth support part 15 are provided at the centers of the first load detection means 21 to the fourth load detection means 24. Is supposed to be located. The first load detection means 21 to the fourth load detection means 24 are offset in advance in a state where no person is on the bed portion 11 of the bed 10.

支持部間距離測定手段25としては、長さに応じて変化する静電容量値から長さを測定するデジタルノギスや、伸縮に伴い生じる信号の数を計測して長さを測定するエンコーダ等により構成される。支持部間距離測定手段25は、第一荷重検出手段21に設けられ、ベッド10の寝床部11の長手方向に直交する横方向(図3のX方向)に伸縮可能である。支持部間距離測定手段25は、第一荷重検出手段21に収納可能である。   As the inter-support portion distance measuring means 25, a digital caliper that measures the length from the capacitance value that changes according to the length, an encoder that measures the length by measuring the number of signals generated due to expansion and contraction, and the like are used. Composed. The distance measurement means 25 between support parts is provided in the 1st load detection means 21, and can be expanded-contracted in the horizontal direction (X direction of FIG. 3) orthogonal to the longitudinal direction of the bed part 11 of the bed 10. As shown in FIG. The inter-support portion distance measuring means 25 can be stored in the first load detecting means 21.

支持部−寝床部端間距離測定手段26としては、長さに応じて変化する静電容量値から長さを測定するデジタルノギスや、伸縮に伴い生じる信号の数を計測して長さを測定するエンコーダ等により構成される。支持部−寝床部端間距離測定手段26は、第一荷重検出手段21に設けられ、ベッド10の寝床部11の長手方向に直交する横方向(図3のX方向)に伸縮可能である。支持部−寝床部端間距離測定手段26は第一荷重検出手段21に収納可能である。   The distance between the support part and the bed part end distance measuring means 26 is a digital caliper that measures the length from a capacitance value that changes according to the length, or the number of signals that are generated due to expansion and contraction to measure the length. It is comprised by the encoder etc. which do. The support portion-bed portion end-to-end distance measuring means 26 is provided in the first load detecting means 21 and can be expanded and contracted in a lateral direction (X direction in FIG. 3) orthogonal to the longitudinal direction of the bed portion 11 of the bed 10. The support portion-bed portion end distance measuring means 26 can be stored in the first load detecting means 21.

重心位置演算手段27および状態判定手段28は、電子回路、マイクロプロセッサ、コンピュータ等により構成され、後述の動作を行うプログラムを備えている。第一荷重検出手段21〜第四荷重検出手段24と、支持部間距離測定手段25と、支持部−寝床部端間距離測定手段26とは、重心位置演算手段27および状態判定手段28を備える電子回路等に検出結果や測定結果を入力できるように、電気的に接続されているか、無線で情報のやりとりができるようになっている。   The center-of-gravity position calculation means 27 and the state determination means 28 are constituted by an electronic circuit, a microprocessor, a computer, and the like, and are provided with a program for performing operations described later. The first load detection means 21 to the fourth load detection means 24, the support portion distance measurement means 25, and the support portion-bed portion end distance measurement means 26 include a gravity center position calculation means 27 and a state determination means 28. Information can be exchanged wirelessly or wirelessly so that detection results and measurement results can be input to an electronic circuit or the like.

実施例1に係る在床状態判定装置20の動作を次に説明する。   Next, the operation of the occupancy state determination apparatus 20 according to the first embodiment will be described.

支持部間距離測定手段25は、一端が第二荷重検出手段22に接触するまで引き出され、支持部間距離測定手段25に備えられた保持手段でその状態が保持され、第一荷重検出手段21から第二荷重検出手段22までの距離が測定される。支持部間距離測定手段25は、第一荷重検出手段21から第二荷重検出手段22までの距離に第一荷重検出手段21の図3のX方向の寸法の半分と、第二荷重検出手段22の図3のX方向の寸法の半分を足して、支持部間距離Lを求める。 The distance measurement means 25 between support parts is pulled out until one end contacts the second load detection means 22, and the state is held by the holding means provided in the distance measurement means 25 between the support parts, and the first load detection means 21. To the second load detecting means 22 is measured. The distance measurement means 25 between support parts is the distance from the 1st load detection means 21 to the 2nd load detection means 22, and the half of the dimension of the 1st load detection means 21 of FIG. by adding half of the X dimension of Fig. 3, obtaining the support portion distance L 1.

支持部−寝床部端間距離測定手段26は、一端が寝床部11の端に到達する位置まで引き出され、支持部−寝床部端間距離測定手段26に備えられた保持手段でその状態が保持され、第一荷重検出手段21から寝床部11の端までの距離が測定される。支持部−寝床部端間距離測定手段26は、第一荷重検出手段21から寝床部11の端までの距離に第一荷重検出手段21の図のX方向の寸法の半分を足して、支持部−寝床部端間距離Lを求める。 The support part-bed part end distance measuring means 26 is pulled out to a position where one end reaches the end of the bed part 11, and the state is maintained by the holding means provided in the support part-bed part end distance measuring means 26. Then, the distance from the first load detection means 21 to the end of the bed portion 11 is measured. The support part-bed part end distance measuring means 26 adds half the dimension of the first load detection means 21 in the X direction of the figure to the distance from the first load detection means 21 to the end of the bed part 11. - obtaining the bed portion end distance L 2.

重心位置演算手段27は、第一荷重検出手段21が検出した第一荷重aと、第二荷重検出手段22が検出した第二荷重aと、第三荷重検出手段23が検出した第三荷重aと、第四荷重検出手段24が検出した第四荷重aとに基づいて、ベッド10の寝床部11上の人の重心位置Wを演算する。重心位置演算手段27は、ベッド10の寝床部11上の人の、寝床部11の長手方向に直交する横方向(図3のX方向)に対する重心位置Wを以下の式1により求める。ここで、重心位置演算手段27は、第一支持部12に近い寝床部11の角を原点とし、図3のX方向を正として位置座標を定義する。

Figure 2011130827
The center-of-gravity position calculation means 27 includes a first load a 1 detected by the first load detection means 21, a second load a 2 detected by the second load detection means 22, and a third load detected by the third load detection means 23. Based on the load a 3 and the fourth load a 4 detected by the fourth load detection means 24, the center-of-gravity position W of the person on the bed portion 11 of the bed 10 is calculated. The center-of-gravity position calculation means 27 obtains the center-of-gravity position W of the person on the bed portion 11 of the bed 10 in the lateral direction (X direction in FIG. 3) orthogonal to the longitudinal direction of the bed portion 11 by the following formula 1. Here, the center-of-gravity position calculation means 27 defines the position coordinates with the corner of the bed portion 11 close to the first support portion 12 as the origin and the X direction in FIG. 3 as positive.
Figure 2011130827

状態判定手段28は、重心位置演算手段27により演算されたベッド10の寝床部11上の人の重心位置Wと、支持部間距離測定手段25により測定された支持部間距離Lと、支持部−寝床部端間距離測定手段26により測定された支持部−寝床部端間距離Lとに基づいて、ベッド10の寝床部11上の人の状態を判定する。具体的には、状態判定手段28は、重心位置演算手段27により演算されたベッド10の寝床部11上の人の重心位置Wが、寝床部11の端から所定距離L以内である場合(次式のいずれかを満たす場合)、ベッド10の寝床部11上の人が転落等する可能性が高いと判定する。

Figure 2011130827
Figure 2011130827
State determining means 28, and the position of the center of gravity W of a person on the bed portion 11 of the bed 10, which is calculated by the center-of-gravity position calculating means 27, a support portion distance L 1 measured by the support unit distance measuring means 25, the support The state of the person on the bed portion 11 of the bed 10 is determined based on the support portion-bed portion end distance L 2 measured by the head-bed portion end distance measuring means 26. Specifically, when the state determining means 28, the gravity center position W of a person on the bed portion 11 of the bed 10, which is calculated by the center-of-gravity position calculating means 27, from the end of the bed portion 11 is within the predetermined distance L e ( When one of the following expressions is satisfied), it is determined that the person on the bed 11 of the bed 10 is highly likely to fall.
Figure 2011130827
Figure 2011130827

実施例1に係る在床状態判定装置20によれば、在床状態判定装置20は支持部間距離測定手段25、支持部−寝床部端間距離測定手段26を備え、支持部間距離測定手段25により支持部間距離Lを、支持部−寝床部端間距離測定手段26により支持部−寝床部端間距離Lを測定し、重心位置演算手段27により寝床部11上の人の重心位置Wを演算する。よって、寝床部11上の人の重心位置Wと寝床部11の端との位置関係および距離がわかる。そして、状態判定手段28により寝床部11上の人の重心位置Wが寝床部11の端から所定距離L以内であるか否かを判定するため、寝床部11上の人の状態(寝床部11の端から転落等する可能性が高いか否か)を正確に判定することができる。また、支持部間距離測定手段25と、支持部−寝床部端間距離測定手段26とを備えているため、寝床部の大きさが異なるベッドや、支持部と寝床部の位置関係が異なる様々なベッドに適用できる。また、支持部間距離測定手段25および支持部間距離測定手段26による距離の測定は容易であるため、利用者や介助者自身が様々なベッドに設置できる。 According to the occupancy state determination device 20 according to the first embodiment, the occupancy state determination device 20 includes the support portion distance measurement means 25 and the support portion-bed portion end distance measurement means 26, and the support portion distance measurement means. a support distance L 1 by 25, the supporting portions - the support portion by the bed portion end distance measuring means 26 - the bed portion end distance L 2 measured by the center of gravity position calculating means 27 of a person on the bed portion 11 center of gravity The position W is calculated. Therefore, the positional relationship and distance between the center of gravity position W of the person on the bed portion 11 and the end of the bed portion 11 can be known. Since the by-state determining means 28 gravity center position W of a person on the bed portion 11 to determine whether the end of the bed portion 11 is within the predetermined distance L e, of a person on the bed portion 11 states (bed section It is possible to accurately determine whether or not there is a high possibility of falling from the end of 11. In addition, since the inter-support portion distance measuring means 25 and the support portion-bed portion end distance measuring means 26 are provided, the beds having different sizes of the bed portions and various positional relationships between the support portions and the bed portions are different. Applicable to any bed. Further, since the distance measurement by the inter-support portion distance measuring means 25 and the inter-support portion distance measuring means 26 is easy, the user or the assistant himself / herself can be installed in various beds.

なお、実施例1では、寝床部11の長手方向に直交する横方向(X方向)の支持部間距離L、支持部−寝床部端間距離Lを測定したが、図3の破線(図2の括弧内符番)で示すように、さらに、第二支持部間距離測定手段29を第一荷重センサ21に設け、第二支持部間距離測定手段29により寝床部11の長手方向(Y方向)の支持部間距離Lを測定し、第二支持部−寝床部端間距離測定手段30を第三荷重センサ23に設け、第二支持部−寝床部端間距離測定手段30により支持部−寝床部端間距離Lを測定し、重心位置演算手段27により第一荷重a〜第四荷重aに基づいてベッド10の寝床部11上の人のY方向についての重心位置を演算し、状態判定手段28によりベッド10の寝床部11上の人の状態を判定するようにしてもよい。 In Example 1, the distance L 1 between the support parts and the distance L 2 between the support part and the bed part end in the lateral direction (X direction) orthogonal to the longitudinal direction of the bed part 11 were measured. As shown by the parenthesis numbers in FIG. 2, the second support portion distance measuring means 29 is further provided in the first load sensor 21, and the second support portion distance measuring means 29 is used in the longitudinal direction ( Y-direction) of the supporting portion distance L 3 was measured, and the second support portions - providing a bed portion end distance measuring means 30 to the third load sensor 23, the second support portion - the bed portion end distance measuring means 30 supporting portion - between the bed portion end distance L 4 is measured, the position of the center of gravity of the Y-direction of a person on the bed portion 11 of the bed 10 on the basis of the center-of-gravity position computing unit 27 to the first load a 1 ~ fourth load a 4 And the state determination means 28 determines the state of the person on the bed portion 11 of the bed 10. It may be so that.

実施例2の在床状態判定装置20は、実施例1と基本的に同様の構成であるため、実施例1と異なる部分について説明を加える。   Since the occupancy state determination device 20 of the second embodiment has basically the same configuration as that of the first embodiment, a description will be given of portions that are different from the first embodiment.

図4は、実施例2に係る在床状態判定装置40を示す説明図である。図5は、実施例2に係る在床状態判定装置40において設定される安全領域の一例を示す説明図である。   FIG. 4 is an explanatory diagram illustrating the occupancy state determination device 40 according to the second embodiment. FIG. 5 is an explanatory diagram illustrating an example of a safety area set in the occupancy state determination device 40 according to the second embodiment.

実施例2の在床状態判定装置40はさらに、重心位置移動速度演算手段31を備える。重心位置移動速度演算手段31は、ベッド10の寝床部11上の人の重心位置の移動速度Vを演算する。図5の下半分のグラフの横軸はベッド10の寝床部11上の人の重心位置W、縦軸は重心位置の移動速度Vを示す。状態判定手段28は、人の重心位置W、人の重心位置の移動速度Vに基づいて、ベッド10の寝床部11上の人の状態を判定する。支持部間距離測定手段25と支持部−寝床部端間距離測定手段26は、実施例1と同様に、支持部間距離Lと支持部−寝床部端間距離Lを測定する。第一荷重検出手段21〜第四荷重検出手段24は、所定の時間ごとに第一荷重a〜第四荷重aを測定する。重心位置演算手段27は、第一荷重検出手段21〜第四荷重検出手段24により検出した第一荷重a〜第四荷重aに基づき、次式によりベッド10の寝床部11上の人のベッド10の長手方向に直交する横方向(X方向)の重心位置を所定時間ごとに演算する。

Figure 2011130827
The occupancy state determination device 40 according to the second embodiment further includes a gravity center position moving speed calculation unit 31. The center-of-gravity position moving speed calculation means 31 calculates a moving speed V of the center of gravity position of the person on the bed 11 of the bed 10. The horizontal axis of the lower half of the graph in FIG. 5 indicates the center of gravity position W of the person on the bed portion 11 of the bed 10, and the vertical axis indicates the moving speed V of the center of gravity position. The state determination unit 28 determines the state of the person on the bed portion 11 of the bed 10 based on the center of gravity position W of the person and the moving speed V of the center of gravity position of the person. Supporting portion and the support portion distance measuring means 25 - bed unit end distance measuring means 26, in the same manner as in Example 1, a support portion supporting portion distance L 1 - measuring the bed portion end distance L 2. The first load detection unit 21 to the fourth load detection unit 24 measure the first load a 1 to the fourth load a 4 every predetermined time. Based on the first load a 1 to the fourth load a 4 detected by the first load detection means 21 to the fourth load detection means 24, the center-of-gravity position calculation means 27 is calculated by The position of the center of gravity in the horizontal direction (X direction) orthogonal to the longitudinal direction of the bed 10 is calculated every predetermined time.
Figure 2011130827

ここで、重心位置Wの座標の原点は、第一支持部12に近い寝床部11の角である。 Here, the origin of the coordinates of the center of gravity position W is the corner of the bed portion 11 close to the first support portion 12.

重心位置移動速度演算手段31は、重心位置演算手段27により演算されたベッド10の寝床部11上の人の所定時間ごとの重心位置Wに基づき、重心位置の移動速度Vを演算する。具体的には、時刻tにおける重心位置W、時刻tから所定時間T経過後における重心位置をWとすると、次式のようになる。

Figure 2011130827
The center-of-gravity position moving speed calculating unit 31 calculates the center-of-gravity position moving speed V based on the center-of-gravity position W of the person on the bed portion 11 of the bed 10 for each predetermined time calculated by the center-of-gravity position calculating unit 27. Specifically, the time t centroid position in a W a, the center of gravity position after a predetermined time T has elapsed from time t a when the W b, is as follows.
Figure 2011130827

状態判定手段28は、重心位置Wと、重心位置の移動速度Vの正負とに基づいて、ベッド10の寝床部11上の人の状態を判定する。   The state determination unit 28 determines the state of the person on the bed portion 11 of the bed 10 based on the gravity center position W and the positive / negative of the moving speed V of the gravity center position.

状態判定手段28は、重心位置Wが0≦X≦(L+2×L)/2であり、重心位置の移動速度Vが正である場合は、Vがあらかじめ設定される重心位置の移動速度の上限値V以下であるか(V≦Vであるか)否かを判定する。上限値V以下である場合(図5の領域a)は、状態判定手段28は、ベッド10の寝床部11上の人の状態が安全領域にあると判定する。上限値Vを超える場合は、状態判定手段28は、ベッド10の寝床部11上の人の状態が安全領域の外にあると判定する。 When the gravity center position W is 0 ≦ X ≦ (L 1 + 2 × L 2 ) / 2 and the movement speed V of the gravity center position is positive, the state determination unit 28 moves the gravity center position where V is set in advance. upper limit value V m less whether the speed (which is V ≦ V m if) determines whether. When the upper limit value Vm is equal to or less than the upper limit value Vm (region a in FIG. 5), the state determination unit 28 determines that the state of the person on the bed portion 11 of the bed 10 is in the safe region. If the upper limit value Vm is exceeded, the state determination means 28 determines that the state of the person on the bed 11 of the bed 10 is outside the safe area.

状態判定手段28は、重心位置Wが(L+2×L)/2≦X≦(L+2×L)であり、重心位置の移動速度Vが正である場合は、重心位置Wと重心位置の移動速度Vが次式を満たすか否かを判定する。

Figure 2011130827
The state determination unit 28 determines that the gravity center position W is (L 1 + 2 × L 2 ) / 2 ≦ X ≦ (L 1 + 2 × L 2 ) and the movement speed V of the gravity center position is positive. And whether the moving speed V of the center of gravity satisfies the following equation.
Figure 2011130827

重心位置Wと重心位置の移動速度Vが式6を満たす場合(図5の領域b)は、状態判定手段28は、ベッド10の寝床部11上の人の状態が安全領域にあると判定する。重心位置Wと重心位置の移動速度Vが式6を満たさない場合は、状態判定手段28は、ベッド10の寝床部11上の人の状態が安全領域の外にあると判定する。なお、式6の不等号を等号に置き換えて得られる式は、X=(L+2×L)/2においてV=V、X=(L+2×L)においてV=0を通る直線を表すものである。 When the gravity center position W and the movement speed V of the gravity center position satisfy Expression 6 (region b in FIG. 5), the state determination unit 28 determines that the state of the person on the bed portion 11 of the bed 10 is in the safety region. . When the gravity center position W and the movement speed V of the gravity center position do not satisfy Expression 6, the state determination unit 28 determines that the state of the person on the bed portion 11 of the bed 10 is outside the safety region. Incidentally, the formula obtained by replacing the inequality sign in Equation 6 to equal sign, X = a (L 1 + 2 × L 2 ) / 2 in V = V m, X = ( L 1 + 2 × L 2) in the V = 0 It represents a straight line that passes through.

状態判定手段28は、重心位置Wが0≦X≦(L+2×L)/2であり、重心位置の移動速度Vが負である場合は、重心位置Wと重心位置の移動速度Vが次式を満たすか否かを判定する。

Figure 2011130827
When the gravity center position W is 0 ≦ X ≦ (L 1 + 2 × L 2 ) / 2 and the movement speed V of the gravity center position is negative, the state determination unit 28 determines the gravity center position W and the movement speed V of the gravity center position. Whether or not satisfies the following equation.
Figure 2011130827

重心位置Wと重心位置の移動速度Vが式7を満たす場合(図5の領域c)は、状態判定手段28は、ベッド10の寝床部11上の人の状態が安全領域にあると判定する。重心位置Wと重心位置の移動速度Vが式7を満たさない場合は、状態判定手段28は、ベッド10の寝床部11上の人の状態が安全領域の外にあると判定する。なお、式7の不等号を等号に置き換えて得られる式は、X=0においてV=0、X=(L+2×L)/2においてV=−Vを通る直線を表すものである。 When the gravity center position W and the movement speed V of the gravity center position satisfy Expression 7 (region c in FIG. 5), the state determination unit 28 determines that the state of the person on the bed portion 11 of the bed 10 is in the safety region. . When the gravity center position W and the movement speed V of the gravity center position do not satisfy Expression 7, the state determination unit 28 determines that the state of the person on the bed portion 11 of the bed 10 is outside the safety region. The equation obtained by replacing the inequality sign in Equation 7 with an equal sign represents a straight line that passes through V = −V m at X = 0, V = 0, and X = (L 1 + 2 × L 2 ) / 2. is there.

状態判定手段28は、重心位置Wが(L+2×L)/2≦X≦(L+2×L)であり、重心位置の移動速度Vが負である場合は、V≧Vを満たすか否かを判定する。V≧Vを満たす場合(図5の領域d)は、状態判定手段28は、ベッド10の寝床部11上の人の状態が安全領域にあると判定する。V≧Vを満たさない場合は、状態判定手段28は、ベッド10の寝床部11上の人の状態が安全領域の外にあると判定する。 The state determination means 28 is V ≧ V when the gravity center position W is (L 1 + 2 × L 2 ) / 2 ≦ X ≦ (L 1 + 2 × L 2 ) and the movement speed V of the gravity center position is negative. It is determined whether m is satisfied. When satisfying V ≧ V m (area of FIG. 5 d), the state determination unit 28 determines that the human condition on the bed portion 11 of the bed 10 is in the safe area. If not satisfied V ≧ V m, the state determination unit 28 determines that the human condition on the bed portion 11 of the bed 10 is outside of the safe area.

以上により、人の重心位置Wからより遠い方の寝床部11の端へ向かう移動は、重心位置の移動速度Vがあらかじめ設定される重心位置の移動速度の上限値V以内であれば安全であると判断でき、人の重心位置からより近いほうの寝床部11の端へ向かう移動は、端へ近づくにつれてより小さな重心速度Vでも転落等の可能性が高くなると判断できる。よって、人の移動に応じて正確な状態判定が行える。 As described above, the movement toward the end of the bed portion 11 that is farther from the person's center of gravity position W is safe if the movement speed V of the center of gravity position is within the preset upper limit value V m of the movement speed of the center of gravity position. It can be determined that there is a movement toward the end of the bed portion 11 that is closer to the center of gravity of the person, and it is possible to determine that the possibility of a fall or the like increases with a smaller center of gravity speed V as the end is approached. Therefore, an accurate state determination can be performed according to the movement of the person.

なお、実施例2でも、実施例1と同様に、第二支持部間距離測定手段29を第一荷重センサ21に設け、第二支持部間距離測定手段29により寝床部11の長手方向(Y方向)の支持部間距離Lを測定し、第二支持部−寝床部端間距離測定手段30を第三荷重センサ23に設け、第二支持部−寝床部端間距離測定手段30により支持部−寝床部端間距離Lを測定し、重心位置演算手段25により第一荷重a〜第四荷重aに基づいてベッド10の寝床部11上の人の寝床部11の長手方向(Y方向)についての重心位置を演算し、重心位置移動速度演算手段31によりベッド10の寝床部11上の人の寝床部11の長手方向(Y方向)の重心位置の移動速度を演算して、状態判定手段28によりベッド10の寝床部11上の人の状態を判定するようにしてもよい。 In the second embodiment, as in the first embodiment, the second support portion distance measuring means 29 is provided in the first load sensor 21, and the second support portion distance measuring means 29 is used in the longitudinal direction (Y measuring the supporting portion distance L 3 direction), the second support portions - providing a bed portion end distance measuring means 30 to the third load sensor 23, the second support portion - supported by the bed portion end distance measuring means 30 part - between bed portion end distance L 4 is measured, the center-of-gravity position calculating means 25 by the longitudinal direction of the first load a 1 ~ fourth load a 4 on the basis of the person on the bed portion 11 of the bed 10 bed section 11 ( The center of gravity position in the longitudinal direction (Y direction) of the person's bed portion 11 on the bed portion 11 of the bed 10 is calculated by the center-of-gravity position movement speed calculation means 31; The state determination means 28 causes the person on the bed 11 of the bed 10 to It may be determined.

なお、安全領域の外郭線は、上記で定義した直線に限定されない。また、寝床部の大きさに応じて任意の複数の範囲に分けてそれぞれ異なる条件を設定してもよい。また、重心位置の移動からベッドの寝床部上の人の状態を判定する方法は、上記のような重心位置の移動速度を用いた方法に限定されず、重心位置の移動を追跡して判定するなど他の方法を用いてもよい。   Note that the outline of the safety region is not limited to the straight line defined above. Further, different conditions may be set for each of a plurality of arbitrary ranges according to the size of the bed portion. Further, the method of determining the state of the person on the bed bed from the movement of the center of gravity position is not limited to the method using the moving speed of the center of gravity position as described above, and the determination is performed by tracking the movement of the center of gravity position. Other methods may be used.

実施例3に係る在床状態判定装置は、実施例1と実施例2との組み合わせである。実施例3に係る在床状態判定装置によれば、ベッド上の人がベッドの端に存在するか否かおよびベッドの端に向かって移動しているか否かの二種類の判定によりベッド上の人の状態を判定することができるため、より正確に状態判定できる。   The occupancy state determination apparatus according to the third embodiment is a combination of the first embodiment and the second embodiment. According to the in-bed state determination device according to the third embodiment, whether or not a person on the bed is present at the end of the bed and whether or not the person is moving toward the end of the bed is determined on the bed. Since the state of a person can be determined, the state can be determined more accurately.

図6は、実施例4に係る在床状態判定装置60を示すブロック図である。なお、図6では、状態判定手段28以外の実施例1、実施例2、実施例3と共通する構成要素を省略している。実施例4に係る在床状態判定装置60は、実施例1、実施例2、または実施例3の在床状態判定装置に、さらに、情報送信手段32、情報受信手段33、表示手段34を加えたものである。情報送信手段32は、状態判定手段28により判定された状態の情報を電波等により送信する。情報送信手段32は、状態判定手段28から情報を受け取り、受け取った情報に応じて電波発生装置を駆動するプログラムを備えた電子回路、マイクロプロセッサ、コンピュータ等と電波発生装置により構成される。情報送信手段30により送信された情報は、情報受信手段33により受信され、情報受信手段33に接続された表示手段34に表示される。また、情報送信手段32がベッド10の寝床部11上の人が安全状態でない旨の情報を送信するようにし、その情報が情報受信手段33により受信され、表示手段34により表示されるようにして、ベッド10から離れている介助者に安全状態でない旨を警告するようにしてもよい。これにより、ベッド10から離れている介助者へベッド10の寝床部11上の人の状態を報知できる。   FIG. 6 is a block diagram illustrating the occupancy state determination device 60 according to the fourth embodiment. In FIG. 6, the components common to the first, second, and third embodiments other than the state determination unit 28 are omitted. The occupancy state determination device 60 according to the fourth embodiment further includes an information transmission unit 32, an information reception unit 33, and a display unit 34 in addition to the occupancy state determination device of the first, second, or third embodiment. It is a thing. The information transmission unit 32 transmits information on the state determined by the state determination unit 28 using radio waves or the like. The information transmission unit 32 is configured by an electronic circuit, a microprocessor, a computer, and the like that include a program that receives information from the state determination unit 28 and drives the radio wave generation device according to the received information. The information transmitted by the information transmitting unit 30 is received by the information receiving unit 33 and displayed on the display unit 34 connected to the information receiving unit 33. Further, the information transmitting means 32 transmits information that the person on the bed portion 11 of the bed 10 is not in a safe state, and the information is received by the information receiving means 33 and displayed by the display means 34. The caregiver who is away from the bed 10 may be warned that it is not safe. Thereby, the state of the person on the bed part 11 of the bed 10 can be notified to an assistant who is away from the bed 10.

なお、情報送信手段32は、第一荷重検出手段21〜第四荷重検出手段24、支持部間距離測定手段25、支持部−寝床部端間距離測定手段26に接続され、第一荷重a〜第四荷重a、支持部間距離L、支持部−寝床部端間距離Lを送信するようにしてもよい。この場合、これらを受信する情報受信手段は重心位置演算手段27、状態判定手段28、重心位置移動速度演算手段31を構成する電子回路、マイクロプロセッサ、コンピュータ等に接続され、表示手段は状態判定手段28に接続される。なお、各手段を電子回路、マイクロプロセッサ、コンピュータ等に割り当てる方法は特に限定されず、結果として各手段が連携して効果を奏するものであればよい。 The information transmitting means 32 is connected to the first load detecting means 21 to the fourth load detecting means 24, the support-to-support distance measuring means 25, and the support-bed-end distance measuring means 26, and the first load a 1. The fourth load a 4 , the distance L 1 between the support parts, and the distance L 2 between the support part and the bed part end may be transmitted. In this case, the information receiving means for receiving them is connected to an electronic circuit, a microprocessor, a computer, etc. constituting the gravity center position calculating means 27, state determining means 28, and gravity center position moving speed calculating means 31, and the display means is the state determining means. 28. Note that a method for assigning each means to an electronic circuit, a microprocessor, a computer, or the like is not particularly limited, and any means may be used as long as each means cooperates as a result.

10 ベッド
11 寝床部
12 第一支持部(支持部)
13 第二支持部(支持部)
14 第三支持部(支持部)
15 第四支持部(支持部)
20 在床状態判定装置
21 第一荷重検出手段(荷重検出手段)
22 第二荷重検出手段(荷重検出手段)
23 第三荷重検出手段(荷重検出手段)
24 第四荷重検出手段(荷重検出手段)
25 支持部間距離測定手段
26 支持部−寝床部端間距離測定手段
27 重心位置演算手段
28 状態判定手段
10 bed 11 bed part 12 first support part (support part)
13 Second support part (support part)
14 Third support part (support part)
15 Fourth support part (support part)
20 In-bed state determination device 21 First load detection means (load detection means)
22 Second load detection means (load detection means)
23 Third load detection means (load detection means)
24 Fourth load detection means (load detection means)
25 distance measurement means between support portions 26 distance measurement means between support portions and bed portions 27 center of gravity position calculation means 28 state determination means

Claims (5)

寝床部と前記寝床部に設けられ床に対して前記寝床部を支持する三つ以上の支持部とを備えたベッドに設置される在床状態判定装置であって、
前記支持部の少なくとも二つにかかる荷重を検出する荷重検出手段と、
前記荷重検出手段の少なくとも一つに設けられ、他の支持部の少なくとも一つまでの支持部間距離を測定する支持部間距離測定手段と、
前記荷重検出手段により検出された前記支持部にかかる荷重に基づいて、前記寝床部上の人の重心位置を演算する重心位置演算手段と、
前記支持部間距離測定手段により測定された前記支持部間距離と前記重心位置演算手段により演算された前記寝床部上の人の重心位置とに基づいて前記寝床部上の人の状態を判定する状態判定手段と、を備えた在床状態判定装置。
A bed-state determination device installed in a bed provided with a bed portion and three or more support portions provided on the bed portion and supporting the bed portion with respect to the floor,
Load detecting means for detecting a load applied to at least two of the support parts;
Provided in at least one of the load detection means, and measuring the distance between the support parts to measure the distance between the support parts to at least one of the other support parts,
Based on the load applied to the support portion detected by the load detection means, the center-of-gravity position calculation means for calculating the position of the center of gravity of the person on the bed part;
The state of the person on the bed is determined based on the distance between the support parts measured by the distance measurement means between the support parts and the center of gravity position of the person on the bed calculated by the center-of-gravity position calculating means. A bed state determination apparatus comprising: a state determination unit;
前記荷重検出手段の少なくとも一つに設けられ、支持部−寝床部端間距離を測定する支持部−寝床部端間距離測定手段をさらに備え、
前記状態判定手段は、前記支持部間距離測定手段により測定された前記支持部間距離と、前記支持部−寝床部端間距離測定手段により測定された前記支持部−寝床部端間距離と、前記重心位置演算手段により演算された前記寝床部上の人の重心位置と、に基づいて前記寝床部上の人の状態を判定する請求項1に記載の在床状態判定装置。
Provided in at least one of the load detection means, further comprising a support part-bed part end distance measuring means for measuring a support part-bed part end distance,
The state determination means includes the distance between the support parts measured by the distance measurement means between the support parts, and the distance between the support part and the bed part edge measured by the distance measurement means between the support part and the bed part edge, The occupancy state determination device according to claim 1, wherein the state of the person on the bed is determined based on the position of the center of gravity of the person on the bed calculated by the center-of-gravity position calculation unit.
寝床部と前記寝床部に設けられ床に対して前記寝床部を支持する三つ以上の支持部とを備えたベッドに設置される在床状態判定装置であって、
前記支持部の少なくとも二つにかかる荷重を所定時間ごとに検出する荷重検出手段と、
前記支持部の少なくとも一つに設けられ、他の支持部の少なくとも一つまでの支持部間距離を測定する支持部間距離測定手段と、
前記荷重検出手段により前記所定時間ごとに検出された前記支持部の少なくとも二つにかかる荷重に基づいて前記寝床部上の人の前記所定時間ごとの重心位置を演算する重心位置演算手段と、
前記重心位置演算手段により演算された前記寝床部上の人の前記所定時間ごとの重心位置に基づいて、前記ベッド上の人の重心位置の移動速度を演算する重心位置移動速度演算手段と、
前記支持部間距離測定手段により測定された前記支持部間距離と、前記重心位置演算手段により演算された前記寝床部上の人の重心位置と、前記重心位置移動速度演算手段により演算された前記寝床部上の人の重心位置の移動速度とに基づいて、前記寝床部上の人の状態を判定する状態判定手段と、を備えた在床状態判定装置。
A bed-state determination device installed in a bed provided with a bed portion and three or more support portions provided on the bed portion and supporting the bed portion with respect to the floor,
Load detecting means for detecting a load applied to at least two of the support portions at predetermined time intervals;
An inter-support-unit distance measuring means that is provided in at least one of the support units and measures the inter-support-unit distance to at least one of the other support units;
A center-of-gravity position calculating means for calculating a center-of-gravity position for each predetermined time of a person on the bed based on a load applied to at least two of the support parts detected for each predetermined time by the load detecting means;
A center-of-gravity position moving speed calculating unit that calculates a moving speed of the center of gravity of the person on the bed based on the center-of-gravity position of the person on the bed calculated by the center-of-gravity position calculating unit;
The distance between the support parts measured by the distance measurement means between the support parts, the gravity center position of the person on the bed calculated by the gravity center position calculation means, and the gravity center position movement speed calculation means calculated by the gravity center position movement speed calculation means A stagnation state determination device, comprising: state determination means for determining a state of a person on the bed based on a moving speed of the center of gravity of the person on the bed.
前記荷重検出手段の少なくとも一つに設けられ、支持部−寝床部端間距離を測定する支持部−寝床部端間距離測定手段をさらに備え、
前記状態判定手段は、前記支持部間距離測定手段により測定された前記支持部間距離と、前記支持部−寝床部端間距離測定手段により測定された前記支持部−寝床部端間距離と、前記重心位置演算手段により演算された前記寝床部上の人の重心位置と、前記重心位置移動速度演算手段により演算された前記寝床部上の人の重心位置の移動速度とに基づいて、前記寝床部上の人の状態を判定する請求項3に記載の在床状態判定装置。
Provided in at least one of the load detection means, further comprising a support part-bed part end distance measuring means for measuring a support part-bed part end distance,
The state determination means includes the distance between the support parts measured by the distance measurement means between the support parts, and the distance between the support part and the bed part edge measured by the distance measurement means between the support part and the bed part edge, Based on the center of gravity position of the person on the bed calculated by the center of gravity position calculating means and the moving speed of the center of gravity position of the person on the bed calculated by the center of gravity position moving speed calculating means The occupancy state determination apparatus according to claim 3, wherein the state of a person on the department is determined.
前記状態判定手段により判定された前記寝床部上の人の状態の情報を送信する情報送信手段と、
前記情報送信手段により送信された前記寝床部上の人の状態の情報を受信する情報受信手段と、
前記情報受信手段に接続され、前記情報受信手段が受信した前記寝床部上の人の状態の情報を表示する表示手段と、を備えた請求項1乃至4のいずれか一項に記載の在床状態判定装置。
Information transmitting means for transmitting information on the state of the person on the bed determined by the state determining means;
Information receiving means for receiving information on the state of the person on the bed portion transmitted by the information transmitting means;
5. The bed according to claim 1, further comprising: a display unit connected to the information receiving unit and displaying information on the state of the person on the bed received by the information receiving unit. State determination device.
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