CN102316839A

CN102316839A - System and method for bed height adjustment

Info

Publication number: CN102316839A
Application number: CN2010800080985A
Authority: CN
Inventors: K·斯塔德坦内尔; A·布劳尔斯; K·埃克
Original assignee: Koninklijke Philips Electronics NV
Current assignee: Koninklijke Philips NV
Priority date: 2009-02-20
Filing date: 2010-02-16
Publication date: 2012-01-11
Also published as: US20110296607A1; EP2398438A1; JP2012518456A; WO2010095098A1; EP2398438B1

Abstract

There is provided a control system for an adjustable height bed, the adjustable height bed having a raised position and a lowered position, the control system comprising an input for receiving signals from a sensor located in the adjustable height bed; and a processor for processing the received signals to determine the status of a user relative to the bed and for generating control signals for adjusting the bed to the raised position or to the lowered position on the basis of the determined status.

Description

The system and method that is used for the bed height adjustment

Technical field

The present invention relates to be used to adjust the system and method for the height of bed, and relate more specifically to reduce the people who uses bed is caused the system and method for the risk of injury.

Background technology

In old people's nursing, prevent the people fall at night (fall) be a subject matter.A large amount of the falling that has been found that the old people occurs in the bedroom, and particularly occurs in and go to bed or WA.

Two modes handling this problem are to be limited in the bed to the patient's who is easy to fall bed equipment bedrail (rail) or with the patient.Yet; These two measures have significant drawback; Promptly dull-witted patient possibly often attempt to climb out of beyond the bedrail of bed, and this can cause even more serious falling, and restriction can cause the patient to become having aggressiveness and restriction can not be tolerated by patient's relatives.

The received much easierly mode that reduces night and fall provides a kind of, and as patient in bed the time, this bed can reduce, and makes the patient sleep very closely.In this way, the distance that the patient can fall has reduced, and has reduced serious injured risk thus.

Certainly, these problem is, when bed during in the position that reduces, the patient is difficult to get up.Reason for this reason, the bed of height-adjustable can use associated control unit to raise electronically usually.These control units possibly be difficult to control for the gerontal patient, and the hands that these gerontal patients receive them has sensitivity or the influence of motility and/or the limited visual acuity affected that reduces.In addition, dementia patients possibly often found to be difficult to handle and operating electronic devices.

Thereby, this means that when bed is in the position of reduction attempt when the patient has to get up, this is to be stranded much more difficult and even possibly to cause additional falling.In addition, the patient who before getting up, their bed is adjusted to enough height may not reduce bed on getting back to bed the time get back to the position of safety.

Therefore, there is demand to the system and method for the difficulty of the bed that overcomes conventional height-adjustable.

Summary of the invention

According to a first aspect of the invention; A kind of control system that is used for the bed of height-adjustable is provided; The bed accessory of said height-adjustable has the position of rising and the position of reduction; Said control system comprises: input is used for receiving the signal from the pick off of the bed that is arranged at said height-adjustable; And processor, be used to handle the signal that is received, confirming the state of user, and generate based on determined state and to be used for said bed is adjusted to the position of said rising or the control of position signal of said reduction with respect to said bed.

According to a second aspect of the invention, a kind of bed of height-adjustable is provided, has comprised: bed or mattress part; Pick off with said bed or mattress partial association; The mechanism of height-adjustable is used for height adjustment with said bed or mattress part to the position that raises or the position of reduction; And aforesaid control system, being coupled to the mechanism of said pick off and said height-adjustable, said control system is configured to generate the control signal of the mechanism that is used for said height-adjustable.

According to a third aspect of the invention we; A kind of method of operating the bed of height-adjustable is provided; The bed accessory of said height-adjustable has the position of rising and the position of reduction, and said method comprises: receive the signal from the pick off in the bed that is arranged at said height-adjustable; Handle the signal that is received, to confirm the state of user with respect to said bed; And said bed is adjusted to the position of said rising or the position of said reduction based on determined state.

Description of drawings

To through the mode of example only exemplary embodiment of the present invention be described with reference to following accompanying drawing now, wherein:

Fig. 1 is according to the bed of height-adjustable of the present invention and the block diagram of control system;

Fig. 2 is the block diagram of control system;

Fig. 3 is the diagram of example from the exemplary sets of signals of pressure transducer;

Fig. 4 is the diagram of the distortion of the exemplary sets of signals in the exemplary plot 3; And

Fig. 5 is the flow chart according to algorithm of the present invention.

The specific embodiment

Fig. 1 shows the bed 2 and control system 4 according to exemplary height-adjustable of the present invention.The bed 2 of height-adjustable has: bed or mattress part 6, and the user can sit or lie on this bed or the mattress part 6; Base 8; And some are used to adjust the mechanism 10 of height-adjustable of the height of bed or mattress part 6.

The height of the mechanism 10 of height-adjustable adjustment bed or mattress part 6 between the position of the position of at least one rising and reduction, in the position that raises, user easier leaves bed 2, and in the position that reduces, the user rolls out the risk that bed injured themselves at 2 o'clock and has reduced.Difference in height between the position that raises and reduce can be in the magnitude of 0.5m-1m.

In a preferred embodiment, bed 2 can be configured to used by the specific user.Particularly, bed or the certain height of mattress part 6 more than the floor in the time of can being adjusted at each position in the position that raises and reduce to different user.For example, can set than short people's height to the position of high people's rising.Through controlling the mechanism of height-adjustable suitably, can realize this configuration to the specific user.

Control system 4 is coupled to the mechanism 10 of height-adjustable, and controls its operation.

Pick off 12 be arranged on the bed or mattress part 6 in or on, be used for sensing user put on the bed or mattress part 6 on power or pressure.Signal from pick off 12 offers control system 4.Preferably, pick off 12 be placed in bed or the mattress part 6 or on, make to lie in bed or 6 last times of mattress part suitably that it can be positioned at below user's the chest the user.

Pick off 12 can be to be used to measure force transducer that the user puts on the power on bed or the mattress part 6, to be used to measure the user and to put on the pressure transducer of the pressure on bed or the mattress part 6 or be used to measure the strained deformeter that the user causes on bed or mattress part 6.In embodiment of this back, be used for confirming that from the measurement result of deformeter the user puts on the pressure on bed or the mattress part 6.In a preferred embodiment, pick off 12 is selected from Piezoelectric switches, piezoelectric foil, electret (electret) paper tinsel or deformeter.It will be understood by those skilled in the art that and to use the pick off of alternative type to carry out according to the method for the invention.

According to the present invention; Control system 4 handle from the signal of pick off 12 with confirm the user with respect to the state of bed (that is, the user be lie down sleeping, as to be sitting in bed 2 edge, go to bed or leave bed 2 or not on the bed 2) and the height of adjustment bed 2 fall with the risk that reduces the user and fall and/or user during themselves risk of injury.

Particularly, gone to bed in 2 and lain on the bed 2 (sleeping or wake), then reduced the height of bed 2, made the user roll out the risk that bed injured themselves at 2 o'clock and reduced if confirmed the user.In addition, if confirmed that the user is sitting in the edge of bed (this can be regarded as the reliable predictor that the user leaves bed 2), the user is leaving bed 2, the height of the bed 2 that then raises makes that the user is easy to stand, and has reduced the risk that the user falls thus.

Control system 4 is preferably enough early predicted or is surveyed the user and will leave bed 2, makes it possible to before bed 2 is increased to safe altitude at the actual bed 2 that leaves of user.In addition, before reducing bed 2, control system 4 is preferably confirmed user's recumbency just safely, reducing when reducing bed, and user's outer risk of bed 2 that comes out one after another.

The height adjustment that should be appreciated that bed 2 is under the control of control system 4, to automatically perform, and need not user or nursing supplier reciprocal action.

Fig. 2 illustrates in greater detail control system 4.Control system 4 has the input 14 that is used to receive from the signal of pick off 12, be coupled to input 14 and handle the signal that receives to confirm the processor 16 of user with respect to the state of bed 2.

Processor 16 is coupled to outfan 18, and the signal of mechanism 10 that is used to control height-adjustable is through this outfan 18 transmission.

Control system 4 also comprises the memorizer 20 that is used for store instruction, and this instruction is used to handle from the algorithm of the signal of pick off 12 and is used to generate the control signal of the mechanism 10 that is used for height-adjustable.

In certain embodiments, control system 4 also can comprise the height controller 22 of user-operable.This controller 22 allows that user or nursing supplier manually control the adjustment of the bed or the height of mattress part 6 (or make the bed height of setting through algorithm according to the present invention invalid).

Though control system 4 is shown bed 2 collaborative settings the with height-adjustable; But be to be understood that; Control system 4 can be provided with away from bed 2; This means that signal from pick off 12 will transfer to control system 4 and be used for handling, and be used to control the mechanism 10 that the signal of the height of bed 2 will transmit back height-adjustable.

The algorithm that processor 16 is carried out will be described now in more detail.

Fig. 3 shows the exemplary sets of signals that receives from pressure transducer 12.Exemplary sets of signals is represented the various different conditions of user and bed 2.Fig. 4 is the diagram that the distortion of the signal shown in Fig. 3 is shown.

In section I, bed is 2 unoccupied, and promptly the user is beyond bed 2, and this is represented by little (＜-1500) signal amplitude, because pick off 12 is random relatively (relaxed) and the weight applied pressure of only measuring mattress.

During section II, the user is sitting on the edge of bed 2, and prepares to lie down.User's center of gravity is left near pick off 12 (it is positioned at the bed or the middle part of mattress part 6, when the user lies down the residing point of its chest), and this means hardly can detect additional pressure.

The signal of record when section III shows the user and just lying down.Lie down and cause having the signal (as shown in Figure 4) of high-amplitude and big relatively variation.

In section IV, the user lies on the bed 2 imperturbably.In this section, user's chest applies sizable additonal pressure to pick off 12, and this signal that causes high-amplitude is by record.Yet the variation of these signals is little, because the user does not move.

In section V, the user sits up.The signal that big High variation at first occurs is in case the user lifts their health then this signal decay rapidly from the zone that pick off 12 is set of bed 2.Less than threshold value a _InAmplitude represent that the processing that sits up almost accomplished.

During section VI, the user is sitting in the edge of bed 2.In section VII, the user has left bed 2, and this signal indication bed 2 is empty.

Fig. 4 shows the step in the algorithm that processor 16 carries out.

Algorithm in step 101 at time t=t _StartBeginning.

In step 103, confirm the height state (promptly bed 2 is in the position that raises or the position that reduces) of bed 2.The state of mechanism 10 that can be through the inspection height-adjustable or carry out this and confirm through read bed 2 state from memorizer 20.

In step 105, read next sample or signal a from pick off 12.

In step 107, with sample a and amplitude threshold a _InCompare.If a is less than threshold value a _In, then handle and move to step 109.

Because the amplitude of signal a is below threshold value, this expression bed is empty, or the user is sitting in the edge of bed, and the bed position that should raise.Therefore, in step 109, if bed 2 state is " height ", then bed 2 remains on the position of rising, and method returns step 105, in step 105, reads next sample.Yet if in step 109, the state of bed 2 is " low " (position that is promptly reducing), handles and moves to step 111, and in step 111, bed 2 is raised, and the setting state of bed is " height ".

Method turns back to step 105 then, in step 105, reads next sample or signal a from pick off 12.

Turn back to step 107, if the amplitude of signal a is greater than threshold value a _In, then method arrives step 113, wherein, and with the variation var and the change threshold var of signal _InCompare.

If change greater than change threshold, then method turns back to step 105, and reads next sample.In the case, the user in bed, but in the process of lying down, sitting up or rolling (shown in section III and the VI of Fig. 3).Therefore, should avoid adjustment, because increase the risk that the user falls like this to bed height.

If change less than change threshold, then method arrives step 115, in step 115, and the height state of examinating couch 2.

Because the amplitude of signal a is more than threshold value, and change below change threshold, so this expression user lies on a bed and the bed position that should reduce imperturbably.Therefore,, then reduce bed, and be " low " the setting state of bed if a bed state be " height ".Method turns back to step 105 then and reads next sample.If in step 115, the bed state is " low ", and then method turns back to step 105 and reads next sample.

As stated, control system 4 can be integrated in the bed 2, or can open in 2 minutes with bed.In certain embodiments, control system 4 can be integrated into the existing electronic device of bed in 2 (for example being used for controlling the electronic device of adjustment of the height of bed 2).

In addition, should be appreciated that the bed 2 of some height-adjustable also can be adjusted to the configuration of chair shape electronically.In the case, following situation is possible: according to algorithm configuration of the present invention is to make when bed 2 moves to the position of rising, and bed 2 also is configured to change into the configuration of chair shape, and vice versa.

In addition, though above-mentioned exemplary embodiment is only utilized single-sensor 12, should be appreciated that it also is possible using more than one sensor 12.

Therefore, a kind of control system that is used for the bed of height-adjustable is provided, it adjusts the height of bed automatically with respect to the state of bed according to the user.When definite user was going to bed or leaving bed, bed can be adjusted to the position of rising, perhaps when definite user is just lying on a bed, bed can adjust to the position of reduction.The risk that in this way, can reduce to fall with fall during risk through being hurt.

Though in accompanying drawing and aforementioned description detailed example with the present invention described, this example should be regarded as exemplary or exemplaryly rather than restrictive with describing, and the invention is not restricted to disclosed embodiment.

According to accompanying drawing, description, reach the research of accompanying claims, when the invention that practice is claimed, those skilled in the art can understand and implement the distortion to disclosed embodiment." comprise " in the claim and do not get rid of other element or step, and definite article " " is not got rid of a plurality of.Several function of record during single processor or other unit can perform obligations require.Some measure is documented in the combination that only fact in the each other different dependent claims does not represent advantageously to utilize these measures.Computer program can be stored/be distributed on the suitable medium; Such as optical storage medium or the solid state medium that provides or provide as the part of other hardware with other hardware; But also can distribute, such as via the Internet or other wired or wireless communication system with other form.Any reference marks in the claim should not be regarded as limiting its scope.

Claims

One kind be used for height-adjustable the bed control system, the bed accessory of said height-adjustable has the position of rising and the position of reduction, said control system comprises:

Input is used for receiving the signal from the pick off of the bed that is arranged at said height-adjustable; And

Processor is used to handle the signal that is received, and with the state of definite user with respect to said bed, and is used for being used for said bed is adjusted to the position of said rising or the control of position signal of said reduction based on determined state generation.
2. control system as claimed in claim 1; Wherein, Confirm that at said processor said state is that said user is when having left or having left said bed or being sitting in the edge of said bed; Said processor is configured to generate the position that is used for said bed is adjusted to said rising, perhaps during the position in said rising, is used for said bed is remained on the control of position signal of said rising at said bed.
3. the control system of stating like claim 2, wherein, when amplitude threshold was following, said processor was configured to confirm that said user has left or left said bed or has been sitting in the edge of said bed in the amplitude of the signal that is received.
4. like claim 1,2 or 3 described control system; Wherein, Confirm that at said processor said state is that said user is just lying in said last time; Said processor is configured to generate the position that is used for said bed is adjusted to said reduction, perhaps during the position in said reduction, is used for said bed is remained on the control of position signal of said reduction at said bed.
5. control system as claimed in claim 4; Wherein, Said processor is configured to, the amplitude of the signal that is received amplitude threshold or more than the said amplitude threshold and the variation of the signal that is received when change threshold is following, confirm that said user just lies on a bed.
6. like the described control system of arbitrary aforementioned claim; The controller that also comprises user-operable, said controller are configured to make that generation is used for said bed is adjusted to the position of said rising or the control of position signal of said reduction said processor in response to user's input.
7. the bed of a height-adjustable comprises:

Bed or mattress part;

Pick off with said bed or mattress partial association;

The mechanism of height-adjustable is used for height adjustment with said bed or mattress part to the position that raises or the position of reduction; And

Like the described control system of arbitrary aforementioned claim, be coupled to the mechanism of said pick off and said height-adjustable, said control system is configured to generate the control signal of the mechanism that is used for said height-adjustable.
One kind operate height-adjustable the bed method, the bed accessory of said height-adjustable has the position of rising and the position of reduction, said method comprises:

Reception is from the signal of the pick off in the bed that is arranged at said height-adjustable;

Handle the signal that is received, to confirm the state of user with respect to said bed; And

Based on determined state said bed is adjusted to the position of said rising or the position of said reduction.
9. method as claimed in claim 8 wherein, is confirming that said state is said user when having left or having left said bed or being sitting in the edge of said bed, and said set-up procedure comprises:

Said bed is adjusted to the position of said rising, perhaps during position, said bed is remained on the position of said rising in said rising at said bed.
10. method as claimed in claim 9, wherein, when amplitude threshold was following, said treatment step confirmed that said user has left or left said bed or has been sitting in the edge of said bed in the amplitude of the signal that is received.
11. like claim 8,9 or 10 described methods, wherein, be that said user is just lying in said last time at definite said state, said set-up procedure comprises:

Said bed is adjusted to the position of said reduction, perhaps during position, said bed is remained on the position of said reduction in said reduction at said bed.
12. method as claimed in claim 11, wherein, the amplitude of the signal that is received amplitude threshold or more than the said amplitude threshold and the variation of the signal that is received when change threshold is following, said treatment step confirms that said user just lies on a bed.