WO2013077313A1 - マットレス、圧力センサ校正方法及びベッド装置 - Google Patents
マットレス、圧力センサ校正方法及びベッド装置 Download PDFInfo
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- WO2013077313A1 WO2013077313A1 PCT/JP2012/080047 JP2012080047W WO2013077313A1 WO 2013077313 A1 WO2013077313 A1 WO 2013077313A1 JP 2012080047 W JP2012080047 W JP 2012080047W WO 2013077313 A1 WO2013077313 A1 WO 2013077313A1
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- pressure
- calibration
- pressure sensor
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
- A47C27/08—Fluid mattresses or cushions
- A47C27/081—Fluid mattresses or cushions of pneumatic type
- A47C27/083—Fluid mattresses or cushions of pneumatic type with pressure control, e.g. with pressure sensors
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
- A61G7/05—Parts, details or accessories of beds
- A61G7/057—Arrangements for preventing bed-sores or for supporting patients with burns, e.g. mattresses specially adapted therefor
- A61G7/05769—Arrangements for preventing bed-sores or for supporting patients with burns, e.g. mattresses specially adapted therefor with inflatable chambers
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
- A47C27/08—Fluid mattresses or cushions
- A47C27/081—Fluid mattresses or cushions of pneumatic type
- A47C27/084—Fluid mattresses or cushions of pneumatic type self inflating
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/44—Detecting, measuring or recording for evaluating the integumentary system, e.g. skin, hair or nails
- A61B5/441—Skin evaluation, e.g. for skin disorder diagnosis
- A61B5/447—Skin evaluation, e.g. for skin disorder diagnosis specially adapted for aiding the prevention of ulcer or pressure sore development, i.e. before the ulcer or sore has developed
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6887—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient mounted on external non-worn devices, e.g. non-medical devices
- A61B5/6892—Mats
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
- A61G7/05—Parts, details or accessories of beds
- A61G7/057—Arrangements for preventing bed-sores or for supporting patients with burns, e.g. mattresses specially adapted therefor
- A61G7/05769—Arrangements for preventing bed-sores or for supporting patients with burns, e.g. mattresses specially adapted therefor with inflatable chambers
- A61G7/05776—Arrangements for preventing bed-sores or for supporting patients with burns, e.g. mattresses specially adapted therefor with inflatable chambers with at least two groups of alternately inflated chambers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L27/00—Testing or calibrating of apparatus for measuring fluid pressure
- G01L27/002—Calibrating, i.e. establishing true relation between transducer output value and value to be measured, zeroing, linearising or span error determination
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L27/00—Testing or calibrating of apparatus for measuring fluid pressure
- G01L27/002—Calibrating, i.e. establishing true relation between transducer output value and value to be measured, zeroing, linearising or span error determination
- G01L27/005—Apparatus for calibrating pressure sensors
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
- A61B2560/02—Operational features
- A61B2560/0223—Operational features of calibration, e.g. protocols for calibrating sensors
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
- A61B2560/02—Operational features
- A61B2560/0242—Operational features adapted to measure environmental factors, e.g. temperature, pollution
- A61B2560/0247—Operational features adapted to measure environmental factors, e.g. temperature, pollution for compensation or correction of the measured physiological value
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/04—Arrangements of multiple sensors of the same type
- A61B2562/046—Arrangements of multiple sensors of the same type in a matrix array
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/16—Details of sensor housings or probes; Details of structural supports for sensors
- A61B2562/168—Fluid filled sensor housings
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G2203/00—General characteristics of devices
- A61G2203/30—General characteristics of devices characterised by sensor means
- A61G2203/34—General characteristics of devices characterised by sensor means for pressure
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G2203/00—General characteristics of devices
- A61G2203/30—General characteristics of devices characterised by sensor means
- A61G2203/42—General characteristics of devices characterised by sensor means for inclination
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G2203/00—General characteristics of devices
- A61G2203/30—General characteristics of devices characterised by sensor means
- A61G2203/44—General characteristics of devices characterised by sensor means for weight
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G7/00—Beds specially adapted for nursing; Devices for lifting patients or disabled persons
- A61G7/002—Beds specially adapted for nursing; Devices for lifting patients or disabled persons having adjustable mattress frame
- A61G7/015—Beds specially adapted for nursing; Devices for lifting patients or disabled persons having adjustable mattress frame divided into different adjustable sections, e.g. for Gatch position
Definitions
- the present invention includes a plurality of cells, a pressure sensor for detecting the internal pressure of the cells, a pump connected to adjust the air amount of each cell, and a communication passage communicating from the pump to the plurality of cells.
- the present invention relates to a mattress having
- Air mattresses are used as body pressure dispersion mattresses, etc., as a mattress that reduces body pressure by dispersing the load on the patient's body lying on this mattress and prevents pressure ulcers from occurring on the patient's body Useful.
- internal pressure control For each cell of the air mattress, it is necessary to adjust the pressure in the cell to a specified range (hereinafter referred to as “internal pressure control”).
- internal pressure control In order to perform the internal pressure control, first, the pressure is measured using a pressure sensor, and the pressure is adjusted by supplying / exhausting each cell based on the measured pressure.
- zero point correction is performed in order to correctly measure the pressure.
- a method for performing zero point correction for example, an apparatus described in Patent Document 1 is known.
- the air mattress is divided into a plurality of systems to form cells, and each system is equipped with a pressure sensor. For these cells, when zero point correction is performed for each system, it is necessary to switch and adjust each system one by one as in the device described in Patent Document 1 described above, which is extremely inconvenient.
- the object of the present invention is to efficiently perform zero point correction without opening the pressure sensor of each cell to atmospheric pressure and even if it is configured by a plurality of systems. It is to provide a mattress and the like capable of zero point correction.
- the mattress of the present invention is In a mattress having a plurality of cells, a pressure sensor for detecting the internal pressure of the cells, a pump connected to adjust the air amount of each cell, and a communication path communicating with the plurality of cells from the pump , A switching valve interposed on a communication path between each cell and the pump, and capable of switching between a state where at least the cell and the pump communicate with each other and a state where the cell is opened to atmospheric pressure; Calibration means for calibrating the pressure sensor; With The calibration means includes When one cell is the calibration reference cell and the switching valve connected to the calibration reference cell is opened to atmospheric pressure, the pressure detected by the pressure sensor connected to the calibration reference cell is within the specified pressure range during calibration.
- Calibration determination means for determining whether or not there has been a specified time during calibration; If the pressure detected by the pressure sensor connected to the calibration reference cell is within the specified pressure range during calibration and continues for the specified time during calibration, the calibration reference cell is based on the pressure value detected by the pressure sensor.
- First calibration means for correcting the zero point of the pressure sensor connected to An internal pressure adjusting means for communicating the plurality of cells and adjusting the plurality of cells to a predetermined internal pressure value based on a pressure value detected by a pressure sensor connected to the calibration reference cell;
- Second calibration means for calibrating each pressure sensor connected to the plurality of cells based on the internal pressure adjusted by the internal pressure adjustment means; It is characterized by providing.
- the mattress of the present invention is The plurality of cells have the same pressure by switching the switching valves interposed in the plurality of cells to communicate with the pump.
- the mattress of the present invention is Having an inter-cell switching valve for communicating between the plurality of cells;
- the internal pressure adjusting means is characterized in that the plurality of cells become dynamic pressures by opening the inter-cell switching valve.
- the mattress of the present invention is It further comprises mattress state detection means for detecting the state of the mattress,
- the calibration means calibrates the pressure sensor when the mattress is in a state where calibration of the pressure sensor can be calibrated.
- the pressure sensor calibration method of the present invention comprises: A mattress having a plurality of cells, a pressure sensor for detecting the internal pressure of the cells, a pump connected to adjust the air amount of each cell, and a communication path communicating from the pump to the plurality of cells.
- a pressure sensor calibration method used A switching valve is provided on a communication path between each cell and the pump, and is capable of switching between a state where at least the cell and the pump communicate with each other and a state where the cell is opened to atmospheric pressure.
- a calibration step for calibrating the pressure sensor comprises: When the switching valve connected to the calibration reference cell is opened to atmospheric pressure, the pressure detected by the pressure sensor connected to the calibration reference cell remains within the specified pressure range during calibration.
- the calibration reference cell is based on the pressure value detected by the pressure sensor. Correcting the zero point of the pressure sensor connected to Communicating the plurality of cells and adjusting the plurality of cells to a predetermined internal pressure value based on a pressure value detected by a pressure sensor connected to the calibration reference cell; and Calibrating each pressure sensor connected to the plurality of cells based on the internal pressure adjusted by the internal pressure adjusting means; It is characterized by including.
- the bed apparatus of the present invention A mattress having a plurality of cells, a pressure sensor for detecting the internal pressure of the cells, a pump connected to adjust the air amount of each cell, and a communication path communicating from the pump to the plurality of cells.
- a bed apparatus comprising a bed body, A switching valve interposed on a communication path between each cell and the pump, and capable of switching between a state where at least the cell and the pump communicate with each other and a state where the cell is opened to atmospheric pressure;
- Calibration determination means for determining whether or not there has been a specified time during calibration; If the pressure detected by the pressure sensor connected to the calibration reference cell is within the specified pressure range during calibration and continues for the specified time during calibration, the calibration reference cell is based on the pressure value detected by the pressure sensor.
- First calibration means for correcting the zero point of the pressure sensor connected to An internal pressure adjusting means for communicating the plurality of cells and adjusting the plurality of cells to a predetermined internal pressure value based on a pressure value detected by a pressure sensor connected to the calibration reference cell;
- Second calibration means for calibrating each pressure sensor connected to the plurality of cells based on the internal pressure adjusted by the internal pressure adjustment means; It is characterized by providing.
- the bed apparatus of the present invention A bed state detecting means for detecting the state of the bed body;
- the calibration means calibrates the pressure sensor when the state of the bed body is in a state where calibration of the pressure sensor can be calibrated.
- the pressure detected by the pressure sensor connected to the calibration reference cell is within the calibration-specified pressure range. It is determined whether or not the specified time for calibration has continued, and if the pressure detected by the pressure sensor connected to the calibration reference cell is within the specified pressure range for calibration, the pressure sensor The zero point is corrected based on the pressure value detected by. Then, the switching valves of the plurality of cells are communicated, and the internal pressure of the plurality of cells is adjusted to a predetermined internal pressure value based on the pressure value detected by the pressure sensor connected to the calibration reference cell. Then, each pressure sensor connected to the plurality of cells is calibrated based on the internal pressure adjusted by the internal pressure adjusting means. Thereby, the zero point correction is performed based on the calibration reference cell, and the pressure sensor connected to another cell can be calibrated using the result.
- FIG. 1 is a diagram for explaining an outline of the bed apparatus 1 in the present embodiment.
- FIG. 2 is a diagram illustrating the bed apparatus 1 from the front side of the foot (the control unit 40 side in FIG. 1).
- the bed apparatus 1 has a mat body 10 placed on a base 30.
- the mat body 10 includes a plurality of cells 14 arranged continuously in the longitudinal direction.
- the mat body 10 is configured by being covered with a cover 12 including a top cover and a bottom cover.
- each cell (cell 14) is connected with a blower tube 42 from the control unit 40.
- a blower tube 44 is connected to the control unit 40 from the pump unit 50.
- the control part 40 and the pump part 50 are connected by the control cable 52, and various control signals are exchanged.
- the pump unit 50 is connected to a control cable 54 from the outside, and is connected to a power cable 56 for driving the pump.
- Each cell 14 is divided into a plurality of sets of systems and connected to a common blower tube 42 as a communication path.
- the blower tube 42 is connected to the switching valve via the blower tube connection connector, and the switch valve is connected to the pump unit 50 via the blower tube.
- the cells are supplied and exhausted by the operation of the pump unit 50 and the switching valve.
- each cell is connected to the pump unit 50 separately from the system A to the system G.
- the cell 14A is connected to the blower tube 42A as the system A.
- the cells 14A belonging to the system A are uniformly supplied and exhausted by the blower tube 42A.
- cell system 1 14a
- cell system 2 14b
- cell system 3 14c
- Each cell system is connected to a blower tube as a communication path from the pump unit 50 and can supply and exhaust air (air) into the cell.
- a switching valve is connected to each cell system.
- the switching valve has, for example, a valve body constituted by a plunger, a switching valve (valve body) connected to the pump side, and a switching valve (valve body) for releasing the air of the cell system to the atmosphere. And have.
- a switching valve 60a connected to the pump and a switching valve 62a for opening to atmospheric pressure are connected to the cell system 1 (14a).
- the cell system 2 (14b) has a switching valve 60b connected to the pump and a switching valve 62b for opening to atmospheric pressure
- the cell system 3 (14c) has a switching valve connected to the pump. 60c and a switching valve 62c for opening to atmospheric pressure are connected to each other.
- the switching valve connected to each cell system may have a switching valve, or may be a single switching valve. That is, in one switching valve, the valve body may be operated so as to switch between a state of being connected to the pump side and being able to supply / exhaust, a state of being able to exhaust to atmospheric pressure, and a state of sealing the cell, depending on the open / closed state of the valve body. .
- a pressure sensor 150a is connected to the cell system 1 (14a), a pressure sensor 150b is connected to the cell system 2 (14b), and a pressure sensor 150c is connected to the cell system 3 (14c). This pressure sensor can detect the internal pressure of the connected cell (system).
- the pump unit 50 is provided with a switching valve 64. Accordingly, for example, by closing the switching valve 64 and opening the switching valve 60a to 60c, the air pressures of the cell systems 1 to 3 become the same pressure.
- FIG. 3 shows a state in which all the switching valves are closed. At this time, each cell system has its own pressure.
- FIG. 4 shows a state in which the switching valve 62c of the cell system 3 (14c) is opened. At this time, the cell system 14c is opened to atmospheric pressure, and the pressure value that is atmospheric pressure is detected by the pressure sensor 150c.
- FIG. 5 shows a state in which the switching valve 60a to the switching valve 60c are opened after the switching valve 62c is closed. Since the switching valve 64 is also closed, the cell system 1 (14a) to the cell system 3 (14c) communicate with each other, and the pressure value (internal pressure) is the same.
- FIG. 6 shows a state in which the switching valve 64 is further opened.
- the air of the cell system is supplied / exhausted by the operation of the pump unit 50 and adjusted to an appropriate pressure value.
- the pressure sensor 150c connected to the cell system 3 (14c) detects the pressure value (internal pressure) of the cell system.
- FIG. 7 shows a state in which the switching valve 64 is closed. Using the pressure value (internal pressure) of each cell at this time, the zero point is corrected for each pressure sensor.
- 3 to 7 have been described as having three cell systems for convenience of explanation. For example, even if there are a plurality of cell systems as in this embodiment, each system can be obtained by using the above-described method. With respect to these cells, it is possible to perform zero point correction at a time to detect an appropriate internal pressure or perform internal pressure adjustment.
- CPU (Central Process Unit) 100 is a functional unit for controlling the entire bed apparatus 1.
- the CPU 100 realizes various functions by reading and executing various programs stored in the storage unit 120.
- the state detection unit 110 is a functional unit for detecting various states in the bed apparatus 1.
- the state is detected by detecting the state of the pressure sensor or detecting the operation signal of the actuator.
- various states can be detected, for example, a back-up angle of a bed, a foot-down angle, a patient's weight, or a patient's bed state. Is possible.
- the storage unit 120 is a functional unit that stores various programs and various data necessary for the operation of the bed apparatus 1.
- the storage unit 120 includes, for example, a semiconductor memory, an HDD (Hard Disk Drive), or the like.
- the storage unit 120 stores an internal pressure setting table 122.
- the internal pressure setting table is a table in which the specified internal pressure value of each cell (cell 14) in the bed apparatus 1 is stored.
- the initial value of the internal pressure value of the cell is stored in association with the back angle and the weight of the patient.
- Each internal pressure value is stored for each cell system and is referred to as needed.
- the pressure sensor 150 is a functional unit for detecting the pressure of each cell, and includes a pressure sensor or the like.
- the pressure sensor 150 is connected to each switching valve (for each cell system) via a blower tube connector. The pressure of each cell is detected by the pressure sensor 150.
- the pump control unit 160 is a functional unit for controlling the pump unit 50. By operating and stopping the pump unit 50, air supply / exhaust control can be realized.
- the switching valve control unit 170 is a functional unit that controls the switching valve connected to each cell system and the switching valve connected to the pump unit 50. By controlling the switching valve, air can be supplied or exhausted together with the operation of the pump unit 50. In addition, control for holding air in each cell is performed.
- the operation display unit 180 is an input unit for a user (for example, a patient, a care recipient, a care staff, or the like) to instruct the bed apparatus 1 to perform an operation, and the state of the bed apparatus 1 to the user. It is a functional part for reporting. For example, it may be composed of a liquid crystal screen having a touch panel or a hardware key.
- FIG. 10 to FIG. 12 show processing related to zero point correction of the pressure sensor that can be performed without opening the pressure sensor to the atmospheric pressure in the present embodiment. In this process as well, there will be described a case where there are three cell systems described in FIGS. 3 to 7 and zero point correction is performed based on the cell system 3.
- the operation may be started explicitly by the operation of an assistant, staff, or the like, or the passage of time (for example, after 12 hours from the previous calibration) ) May be started.
- the calibratable state is, for example, -Bed back angle is less than 4 degrees-Knee angle is less than 4 degrees-Foot angle is less than 4 degrees-Bed device tilt range is within 4 degrees-Foot contraction amount is within 2cm-Operating mode is normal mode It is determined whether it is satisfied. If the above operating conditions are satisfied (step S100; Yes), the elapsed time timer starts counting (step S102). Thus, by monitoring the bed state and mattress state and executing this processing when the calibration is possible, the calibration can be performed safely.
- step S104 automatic calibration of a reference system (hereinafter referred to as “calibration reference system”) for performing zero point correction is performed (step S104).
- calibration reference system a reference system for performing zero point correction
- step S202 internal pressure adjustment is performed on a system other than the calibration reference system based on a normal control equation. For example, when the automatic calibration sequence of the cell system 3 is executed, the internal pressure adjustment is executed for the cell systems 1 and 2 other than the cell system 3 based on the normal control equation.
- the internal pressure adjustment is performed based on the normal control formula
- the internal pressure adjustment is performed based on the internal pressure setting value stored in the internal pressure setting table 122.
- step S204 the calibration reference system is naturally exhausted. Thereafter, the color measurement time timer is started (step S206).
- the amount of change in pressure is within a predetermined specified pressure range at the time of calibration (within the specified pressure range at the time of calibration). It is determined whether or not there is (step S208). For example, it is determined whether or not the specified pressure range during calibration is within ⁇ 0.4 kPa as the specified time during calibration for 5 seconds.
- the measurement time is an error determination time (for example, 1 minute).
- step S214 If the measurement time has passed the error determination time (step S214; Yes), the process moves to step S122 in FIG.
- the measurement average value of the pressure within the specified calibration time is P.
- P the measurement average value of the pressure within the specified calibration time
- step S212 automatic calibration is performed on the pressure value detected by the pressure sensor of the calibration reference system so that P becomes 0 kpa (step S212).
- the zero point correction of the pressure sensor of the calibration reference system is performed based on the atmospheric pressure.
- step S106 all the systems are communicated (step S106). For example, the supply / exhaust switching valve is opened. As a result, the internal pressures of all the cell systems (cell systems 1 to 3) are the same.
- step S108 all the systems are adjusted to a predetermined internal pressure.
- step S108 since all the supply / exhaust switching valves are opened in step S106, the internal pressure adjustment is executed with the same pressure value.
- the pressure value P is detected using a pressure sensor connected to the calibration reference system (step S110). Then, a pressure measurement time timer is started (step S112).
- step S114 it is determined whether or not the pressure change amount is within the calibration specified range for a specified calibration time (step S114).
- the pressure change amount is within the calibration specified range for a predetermined calibration time or if the pressure change amount is outside the calibration specified range (step S114; No)
- the pressure It is determined whether or not the measurement time timer has passed a predetermined time (step S124).
- step S124 determines that an error has occurred, and the process is stopped.
- step S114 if it is continued during the calibration specified time that the pressure change amount is within the calibration specified range in all systems (step S114; Yes), the pressure average value of each system for the calibration specified time is acquired. (Step S116).
- step S118 the pressure average value of each system and the pressure value P are compared, and the pressure sensor connected to each system is calibrated.
- step S122 After each pressure sensor is calibrated, the internal pressure adjustment is started so that all the systems have the specified internal pressure (step S122).
- the pressure sensor of the entire cell of the bed apparatus can be calibrated using only one cell system. At this time, since the cell systems are calibrated one by one, the pressure sensor can be calibrated regardless of whether the patient is lying on the bed apparatus (air mattress).
- the pressure sensor when it is determined that the state of the mattress or the bed apparatus is a state in which the pressure sensor can be calibrated, the pressure sensor can be calibrated regardless of the patient's bed state. have.
- predetermined pressure value, range, time, etc. in the above-described embodiment are specific values for understanding the present invention. Therefore, it is not interpreted as being limited to the value.
- the calibration reference system is described as one, but it is needless to say that a plurality of calibration reference systems may be used.
- a plurality of calibration reference systems may be used.
- more accurate zero point correction can be performed by using a plurality of calibration reference systems.
- FIG. 12 is a diagram showing only steps S100 to S106 in FIG. 10, and the same processing as in FIG. 10 is executed after step S108. Moreover, the same code
- the automatic calibration sequence of FIG. 11 is executed with the system A as the calibration reference system (step S104a).
- the internal pressure of system A is adjusted to the specified internal pressure (step S104b).
- the automatic calibration sequence of FIG. 11 is executed with the system B as the calibration reference system (step S104c).
- the internal pressure of system B is adjusted to the specified internal pressure (step S104d).
- step S104e the automatic calibration sequence of FIG. 11 is executed with the system C as the calibration reference system.
- the three systems as the calibration reference system, more accurate zero point correction can be performed.
- the entire air mattress may be formed by simply arranging the cells in the longitudinal direction without being divided into upper and lower parts.
- each cell is connected to and communicated with the pump by opening the supply / exhaust switching valve.
- a method may be used. For example, as shown in FIG. 14, it is good also as providing the switching valve 66 for communication separately between each cell, and making each cell communicate by opening the said switching valve 66.
- FIG. 14 it is good also as providing the switching valve 66 for communication separately between each cell, and making each cell communicate by opening the said switching valve 66.
- the process for obtaining the “average value” not only simply obtaining the average value of the acquired values but also obtaining by other calculation methods may be used.
- the average value of the remaining data excluding the maximum value and the minimum value may be calculated, or the average value of the remaining data excluding the median value may be calculated.
- the average value may be calculated using a geometric average or a weighted average instead of a simple arithmetic average.
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Abstract
Description
複数のセルと、セルの内圧を検出する圧力センサと、各セルの空気量を調整するために接続されたポンプと、前記ポンプから複数のセルに対して連通される連通路とを有するマットレスにおいて、
前記各セルと前記ポンプとの間の連通路上に介装され、少なくとも前記セルと前記ポンプとを連通される状態と、前記セルを大気圧に開放される状態とに切り替え可能な切替弁と、
前記圧力センサを校正するための校正手段と、
を備えており、
前記校正手段は、
一のセルを校正基準セルとし、校正基準セルに接続された切替弁を大気圧に開放した場合に、当該校正基準セルに接続される圧力センサにより検出される圧力が校正時規定圧力範囲内であることが校正時規定時間継続したか否かを判定する校正判定手段と、
前記校正基準セルに接続される圧力センサにより検出される圧力が校正時規定圧力範囲内であると校正時規定時間継続した場合には、当該圧力センサにより検出された圧力値に基づいて校正基準セルに接続された圧力センサのゼロ点補正する第1校正手段と、
前記複数のセルを連通させ、前記校正基準セルに接続された圧力センサにより検出される圧力値に基づいて、前記複数のセルを所定の内圧値に内圧調整を行う内圧調整手段と、
前記複数のセルに接続された各圧力センサを、前記内圧調整手段により調整された内圧に基づいて校正を行う第2校正手段と、
を備えることを特徴とする。
前記複数のセルに介装されている切替弁を前記ポンプに切り替えて連通させることにより、前記複数のセルは同圧となることを特徴とする。
前記複数のセル間を連通させるセル間切替弁を有しており、
前記内圧調整手段は、前記セル間切替弁を開放することにより、前記複数のセルは動圧となることを特徴とする。
前記マットレスの状態を検出するマットレス状態検出手段を更に有し、
前記校正手段は、前記マットレスの状態が前記圧力センサの校正を校正することが出来る状態である場合には、前記圧力センサの校正を行うことを特徴とする。
複数のセルと、セルの内圧を検出する圧力センサと、各セルの空気量を調整するために接続されたポンプと、前記ポンプから複数のセルに対して連通される連通路とを有するマットレスに用いられる圧力センサ校正方法であって、
前記各セルと前記ポンプとの間の連通路上に介装され、少なくとも前記セルと前記ポンプとを連通される状態と、前記セルを大気圧に開放される状態とに切り替え可能な切替弁を有しており、
前記圧力センサを校正するための校正ステップは、
校正基準セルに接続された切替弁を大気圧に開放した場合に、当該校正基準セルに接続される圧力センサにより検出される圧力が校正時規定圧力範囲内であることが校正時規定時間継続したか否かを判定するステップと、
前記校正基準セルに接続される圧力センサにより検出される圧力が校正時規定圧力範囲内であると校正時規定時間継続した場合には、当該圧力センサにより検出された圧力値に基づいて校正基準セルに接続された圧力センサのゼロ点補正するステップと、
前記複数のセルを連通させ、前記校正基準セルに接続された圧力センサにより検出される圧力値に基づいて、前記複数のセルを所定の内圧値に内圧調整を行うステップと、
前記複数のセルに接続された各圧力センサを、前記内圧調整手段により調整された内圧に基づいて校正を行うステップと、
を含むことを特徴とする。
複数のセルと、セルの内圧を検出する圧力センサと、各セルの空気量を調整するために接続されたポンプと、前記ポンプから複数のセルに対して連通される連通路とを有するマットレスと、ベッド本体とを備えたベッド装置において、
前記各セルと前記ポンプとの間の連通路上に介装され、少なくとも前記セルと前記ポンプとを連通される状態と、前記セルを大気圧に開放される状態とに切り替え可能な切替弁と、
前記圧力センサを校正するための校正手段と、
を備えており、
前記校正手段は、
一のセルを校正基準セルとし、校正基準セルに接続された切替弁を大気圧に開放した場合に、当該校正基準セルに接続される圧力センサにより検出される圧力が校正時規定圧力範囲内であることが校正時規定時間継続したか否かを判定する校正判定手段と、
前記校正基準セルに接続される圧力センサにより検出される圧力が校正時規定圧力範囲内であると校正時規定時間継続した場合には、当該圧力センサにより検出された圧力値に基づいて校正基準セルに接続された圧力センサのゼロ点補正する第1校正手段と、
前記複数のセルを連通させ、前記校正基準セルに接続された圧力センサにより検出される圧力値に基づいて、前記複数のセルを所定の内圧値に内圧調整を行う内圧調整手段と、
前記複数のセルに接続された各圧力センサを、前記内圧調整手段により調整された内圧に基づいて校正を行う第2校正手段と、
を備えることを特徴とする。
前記ベッド本体の状態を検出するベッド状態検出手段を更に有し、
前記校正手段は、前記ベッド本体の状態が前記圧力センサの校正を校正することが出来る状態である場合には、前記圧力センサの校正を行うことを特徴とする。
[1.全体構成図]
[1.1 装置概略]
まず、本発明を適用したベッド装置全体の構成について図1及び図2を用いて説明する。図1は、本実施形態におけるベッド装置1の概略を説明するための図である。図2は、ベッド装置1を足側正面(図1の制御部40側)から表した図である。
続いて、各セル(セル14)の構成について、図2を用いて説明する。
続いて、切替弁の動作について、図3から図7を用いて説明する。なお、切替弁の動作としては、説明の都合3つのセル系統が接続されている場合を一例として説明する。
続いて、ベッド装置1の機能構成について図8を用いて説明する。ベッド装置1は、図8に示すように、CPU100に、状態検出部110と、記憶部120と、圧力センサ150と、ポンプ制御部160とが接続されている。
続いて処理の流れについて図を用いて説明する。図10から図12は、本実施形態において、圧力センサを大気圧に開放せずに行える圧力センサのゼロ点補正に関する処理である。なお、当該処理についても、図3~図7で説明したセル系統が3つであり、セル系統3に基づいてゼロ点補正をする場合について説明する。
・ベッド背角度が4度未満
・膝角度が4度未満
・足角度が4度未満
・ベッド装置の傾斜の範囲が4度以内
・足収縮量が2cm以内
・動作モードが通常モード
という動作条件を満たしているか否かを判定する。そして、上記の動作条件を満たしている場合には(ステップS100;Yes)、経過時間タイマーのカウントを開始する(ステップS102)。このようにベッドの状態や、マットレスの状態を監視し、校正可能な状態な場合に本処理を実行するとすることにより、安全に校正を行うことが可能となる。
以上、この発明の実施形態について図面を参照して詳述してきたが、具体的な構成はこの実施形態に限られるものではなく、この発明の要旨を逸脱しない範囲の設計等も特許請求の範囲に含まれる。
10 マット本体
12 カバー
14 セル
14a、14b、14c セル系統
30 ベース
40 制御部
42、44 送風チューブ
50 ポンプ部
52 制御ケーブル
54 制御ケーブル
56 電源ケーブル
60a、60b、60c、62a、62b、62c、64、66 切替弁
100 CPU
110 状態検出部
120 記憶部
122 内圧設定テーブル
150、150a、150b、150c 圧力センサ
160 ポンプ制御部
170 切替弁制御部
180 操作表示部
Claims (7)
- 複数のセルと、セルの内圧を検出する圧力センサと、各セルの空気量を調整するために接続されたポンプと、前記ポンプから複数のセルに対して連通される連通路とを有するマットレスにおいて、
前記各セルと前記ポンプとの間の連通路上に介装され、少なくとも前記セルと前記ポンプとを連通される状態と、前記セルを大気圧に開放される状態とに切り替え可能な切替弁と、
前記圧力センサを校正するための校正手段と、
を備えており、
前記校正手段は、
一のセルを校正基準セルとし、校正基準セルに接続された切替弁を大気圧に開放した場合に、当該校正基準セルに接続される圧力センサにより検出される圧力が校正時規定圧力範囲内であることが校正時規定時間継続したか否かを判定する校正判定手段と、
前記校正基準セルに接続される圧力センサにより検出される圧力が校正時規定圧力範囲内であると校正時規定時間継続した場合には、当該圧力センサにより検出された圧力値に基づいて校正基準セルに接続された圧力センサのゼロ点補正する第1校正手段と、
前記複数のセルを連通させ、前記校正基準セルに接続された圧力センサにより検出される圧力値に基づいて、前記複数のセルを所定の内圧値に内圧調整を行う内圧調整手段と、
前記複数のセルに接続された各圧力センサを、前記内圧調整手段により調整された内圧に基づいて校正を行う第2校正手段と、
を備えることを特徴とするマットレス。 - 前記複数のセルに介装されている切替弁を前記ポンプに切り替えて連通させることにより、前記複数のセルは同圧となることを特徴とする請求項1に記載のマットレス。
- 前記複数のセル間を連通させるセル間切替弁を有しており、
前記内圧調整手段は、前記セル間切替弁を開放することにより、前記複数のセルは動圧となることを特徴とする請求項1に記載のマットレス。 - 前記マットレスの状態を検出するマットレス状態検出手段を更に有し、
前記校正手段は、前記マットレスの状態が前記圧力センサの校正を校正することが出来る状態である場合には、前記圧力センサの校正を行うことを特徴とする請求項1から3の何れか一項に記載のマットレス。 - 複数のセルと、セルの内圧を検出する圧力センサと、各セルの空気量を調整するために接続されたポンプと、前記ポンプから複数のセルに対して連通される連通路とを有するマットレスに用いられる圧力センサ校正方法であって、
前記各セルと前記ポンプとの間の連通路上に介装され、少なくとも前記セルと前記ポンプとを連通される状態と、前記セルを大気圧に開放される状態とに切り替え可能な切替弁を有しており、
前記圧力センサを校正するための校正ステップは、
校正基準セルに接続された切替弁を大気圧に開放した場合に、当該校正基準セルに接続される圧力センサにより検出される圧力が校正時規定圧力範囲内であることが校正時規定時間継続したか否かを判定するステップと、
前記校正基準セルに接続される圧力センサにより検出される圧力が校正時規定圧力範囲内であると校正時規定時間継続した場合には、当該圧力センサにより検出された圧力値に基づいて校正基準セルに接続された圧力センサのゼロ点補正するステップと、
前記複数のセルを連通させ、前記校正基準セルに接続された圧力センサにより検出される圧力値に基づいて、前記複数のセルを所定の内圧値に内圧調整を行うステップと、
前記複数のセルに接続された各圧力センサを、前記内圧調整手段により調整された内圧に基づいて校正を行うステップと、
を含むことを特徴とする圧力センサ校正方法。 - 複数のセルと、セルの内圧を検出する圧力センサと、各セルの空気量を調整するために接続されたポンプと、前記ポンプから複数のセルに対して連通される連通路とを有するマットレスと、ベッド本体とを備えたベッド装置において、
前記各セルと前記ポンプとの間の連通路上に介装され、少なくとも前記セルと前記ポンプとを連通される状態と、前記セルを大気圧に開放される状態とに切り替え可能な切替弁と、
前記圧力センサを校正するための校正手段と、
を備えており、
前記校正手段は、
一のセルを校正基準セルとし、校正基準セルに接続された切替弁を大気圧に開放した場合に、当該校正基準セルに接続される圧力センサにより検出される圧力が校正時規定圧力範囲内であることが校正時規定時間継続したか否かを判定する校正判定手段と、
前記校正基準セルに接続される圧力センサにより検出される圧力が校正時規定圧力範囲内であると校正時規定時間継続した場合には、当該圧力センサにより検出された圧力値に基づいて校正基準セルに接続された圧力センサのゼロ点補正する第1校正手段と、
前記複数のセルを連通させ、前記校正基準セルに接続された圧力センサにより検出される圧力値に基づいて、前記複数のセルを所定の内圧値に内圧調整を行う内圧調整手段と、
前記複数のセルに接続された各圧力センサを、前記内圧調整手段により調整された内圧に基づいて校正を行う第2校正手段と、
を備えることを特徴とするベッド装置。 - 前記ベッド本体の状態を検出するベッド状態検出手段を更に有し、
前記校正手段は、前記ベッド本体の状態が前記圧力センサの校正を校正することが出来る状態である場合には、前記圧力センサの校正を行うことを特徴とする請求項6に記載のベッド装置。
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FR2774573B1 (fr) * | 1998-02-09 | 2000-04-28 | Support Systems International | Procede et appareil de support d'un element a supporter, en particulier le corps d'un patient, a systeme integre d'equilibre dynamique et automatique de pression |
JP4067854B2 (ja) * | 2002-04-02 | 2008-03-26 | 株式会社ケープ | エアマット及びその空気供給方法 |
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FR2922439B1 (fr) * | 2007-10-18 | 2010-12-10 | Hill Rom Ind Sa | Procede de gonflage alterne d'un dispositif de support a cellules gonflables et dispositif pour sa mise en oeuvre |
US8868244B2 (en) * | 2010-02-04 | 2014-10-21 | Anodyne Medical Device, Inc. | Support surface with proximity sensor and operable in low power mode |
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2012
- 2012-11-20 EP EP12850777.9A patent/EP2783602B1/en not_active Not-in-force
- 2012-11-20 WO PCT/JP2012/080047 patent/WO2013077313A1/ja active Application Filing
- 2012-11-20 KR KR20147016708A patent/KR20140092924A/ko not_active Application Discontinuation
- 2012-11-20 JP JP2013545924A patent/JP6190271B2/ja active Active
- 2012-11-20 CN CN201280057265.4A patent/CN103945736B/zh active Active
- 2012-11-20 US US14/359,405 patent/US9009898B2/en active Active
Patent Citations (2)
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JPH0549529A (ja) * | 1991-08-27 | 1993-03-02 | Matsushita Electric Works Ltd | エアマツト |
JP2007159822A (ja) | 2005-12-14 | 2007-06-28 | Nippon Pulse Motor Co Ltd | 圧力制御装置 |
Non-Patent Citations (1)
Title |
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See also references of EP2783602A4 |
Also Published As
Publication number | Publication date |
---|---|
EP2783602B1 (en) | 2017-06-28 |
CN103945736A (zh) | 2014-07-23 |
JPWO2013077313A1 (ja) | 2015-04-27 |
JP6190271B2 (ja) | 2017-08-30 |
KR20140092924A (ko) | 2014-07-24 |
EP2783602A4 (en) | 2015-07-15 |
US20150000044A1 (en) | 2015-01-01 |
EP2783602A1 (en) | 2014-10-01 |
US9009898B2 (en) | 2015-04-21 |
CN103945736B (zh) | 2016-05-04 |
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