CN102078184A - Method for monitoring body position by using weighing bed and weighing bed - Google Patents
Method for monitoring body position by using weighing bed and weighing bed Download PDFInfo
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- CN102078184A CN102078184A CN2010106167537A CN201010616753A CN102078184A CN 102078184 A CN102078184 A CN 102078184A CN 2010106167537 A CN2010106167537 A CN 2010106167537A CN 201010616753 A CN201010616753 A CN 201010616753A CN 102078184 A CN102078184 A CN 102078184A
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Abstract
The invention discloses a method for monitoring a body position by using a weighing bed. The weighing bed comprises a bed body, a supporting framework, a plurality of fulcrums, a weighing circuit module and a processing unit, wherein the fulcrums are formed between the bed body and the supporting framework and provided with weighing sensors respectively, the weighing circuit module is connected with the weighing sensors and converts the electrical signals of loads sensed by the weighing sensors into weight information, and the processing unit is connected with the weighing circuit module. The gravity center of a detected object on the bed body is calculated by using the detected loads of the fulcrums and the coordinate parameters of the fulcrums, and the change locus of the monitored gravity center is continuously measured so as to realize monitoring of the body position of a person lying in the bed and the change of the body position. The method can realize double monitoring of the weight and the body position of the person lying in the bed, and can also be conveniently used for monitoring the sleep quality.
Description
Technical field
The present invention relates to technical field of medical instruments, particularly relate to a kind of method and weigh-bed thereof that utilizes weigh-bed to carry out the position monitoring.
Background technology
Patient's the body weight change of body weight change, particularly critical patient of seeking medical advice is to need the important indicator of monitoring in the therapeutic process, detects the sick bed etc. that is equipped with wheelchair scale, scale and has function of weighing of patient body weight.For the patient who needs long-term bed especially heavy patient, can only use the sick bed that has function of weighing to implement the body weight monitoring.
Publication number is that the Chinese patent application of CN101095611A discloses a kind of composite type electronic avoirdupois monitoring instrument and Weighing method thereof, the Weighing method of this patent application design is to add four weighing pans in the bottom of four cabinet bases, the sense weight of four weighing pans of accumulative total obtains patient body weight and variation thereof behind the removal initial weight.
Publication number is that the Chinese patent application of CN101677786A discloses body weight and/or the motion sensing on a kind of bed, it is another kind of weigh-bed principle, mattress frame and with bedstead that ground contacts between several force cells are set mattress frame are supported, mattress is placed on the mattress frame, and the weight on it is measured accumulation by force cell and obtained.
Publication number is that the Chinese patent application of CN101282686A discloses a kind of system that is used to monitor a plurality of different parameters of patient on the bed, and it can detect bed person's weight and motion.This patent application is integrated polytype pick off or LOAD CELLS and piezoelectric transducer be integrated in the measuring unit structure in the bed body, form a kind of compound sensor structure, monitor patient's body weight change and motion change respectively, utilize LOAD CELLS to measure patient body weight, utilize piezoelectric transducer monitoring patient's motion.
In the existing technology, no matter be single LOAD CELLS configuration or the configuration of a plurality of LOAD CELLS, described LOAD CELLS only is used for the detection of patient's body weight and variation thereof or monitors from bed, be that weight with the one or more LOAD CELLSs back of adding up is handled as a single weight signal and used, realize and when needs detect bed person's kinestate, will wait by other pick off such as piezoelectric transducer.
Summary of the invention
Technical problem to be solved by this invention is: propose the method for a kind of position monitoring and have the weigh-bed of position monitoring function, do not need additionally to increase measuring transducer, utilize the pick off that only is used for monitoring weight in the conventional art, introduce the center of gravity monitoring method, realize the double monitoring of body weight and position, on the basis of conventional art monolithic entity re-detection, increased the function of position monitoring, enriched the application category of bed with weighing technology.
The method of utilizing weigh-bed to carry out the position monitoring of the present invention adopts following technical scheme:
The described method of utilizing weigh-bed to carry out the position monitoring, described weigh-bed comprises a body, support frame, the a plurality of fulcrums that LOAD CELLS is installed respectively that between bed body and support frame, are provided with, the electrical signal conversion with described LOAD CELLS that is connected with described LOAD CELLS becomes the circuit module of weighing of weight information, and the processing unit that is connected with the described circuit module of weighing, utilize the load of detected each fulcrum and the coordinate parameters of each fulcrum, calculate the center of gravity of measurand on the described bed body, by the variation track of continuous measurement monitoring center of gravity, thereby realization is to the monitoring of bed person's position and variation thereof.
Preferably, comprise the steps:
1) measure load: under the control of processing unit, the load on described each fulcrum of LOAD CELLS perception, and the electrical signal conversion of load is become weight information by the circuit module of weighing;
2) calculate barycentric coodinates: described processing unit calculates the barycentric coodinates of measurand with respect to the coordinate position of preset coordinate system according to the load on described each fulcrum and each fulcrum;
3) the position monitoring is judged: according to original state and the barycentric coodinates and the variation track thereof of measurand, judge the position and the variation thereof of measurand.
Barycentric coodinates described step 2) (X, Y) determine by following formula: X=
, Y=
, in the formula, Fi is the load of i fulcrum, and Xi and Yi are respectively abscissa and the vertical coordinate of i fulcrum with respect to preset coordinate system, are algebraic value, and n is the number of fulcrum, n 〉=1.
Preferably, the zero of the system of preset coordinate described in the described step 3) is the centrosymmetry point of described each fulcrum.
Preferably, the method of parallel measurement is adopted in the measurement of described step 1) central bearing point load, described fulcrum is at least three, the LOAD CELLS at each fulcrum place is equipped with the circuit module of weighing, described LOAD CELLS on each described fulcrum and the described circuit module of weighing connect one to one respectively, measure the load of each fulcrum simultaneously.
Preferably, the measuring method of scan round is adopted in the measurement of described step 1) central bearing point load, described fulcrum is at least three, the described circuit module quantity of weighing is one, described LOAD CELLS on each described fulcrum is connected with the described circuit module of weighing by a multidiameter option switch respectively, and the load of each fulcrum is measured in circulation.
Preferably, before described step 1), also comprise zero clearing, before promptly using, the initial load on the described bed body as zero point, is measured on this basis.
Weigh-bed with position monitoring function of the present invention adopts following technical scheme:
Described weigh-bed with position monitoring function, comprise that a body, support frame, a plurality of fulcrums that LOAD CELLS is installed respectively that are provided with, the electrical signal conversion with described LOAD CELLS that is connected with described LOAD CELLS become the circuit module of weighing of weight information between bed body and support frame, and the processing unit that is connected with the described circuit module of weighing, described processing unit comprises computing module and position monitoring judge module, and described computing module is connected with described position monitoring judge module with the described circuit module of weighing respectively; Described computing module calculates the barycentric coodinates of measurand with respect to the coordinate position of preset coordinate system according to received weight information and each LOAD CELLS; Described position monitoring judge module is used for original state and barycentric coodinates and the variation thereof according to measurand, judges the position and the variation thereof of measurand.
Preferably, described LOAD CELLS quantity is at least three, and the described circuit module quantity of weighing is at least three, and described LOAD CELLS and the described circuit module of weighing connect one to one respectively.
Preferably, described LOAD CELLS quantity is at least three, and the described circuit module quantity of weighing is one, and described each LOAD CELLS is connected with the described circuit module of weighing by a multidiameter option switch respectively.
Preferably, also comprise display terminal, described display terminal is connected with described processing unit.
The beneficial effect that the present invention is compared with the prior art is: owing to introduced many point load independent detection and center of gravity calculation technology, by center of gravity and change and to judge and monitor the position of measurand, on the basis of existing sick bed weighing system monolithic entity re-detection, increased the function of position monitoring, enriched the function and application scope of bed with weighing technology.
Description of drawings
Fig. 1 is the weigh-bed structural representation with four LOAD CELLSs that adopts in the embodiment of the invention;
Fig. 2 be among Fig. 1 the bed body to the force diagram of LOAD CELLS;
Fig. 3 is the geometric position and the coordinate sketch map of LOAD CELLS among Fig. 1;
Fig. 4 is the measuring system sketch map of weigh-bed in the embodiment of the invention one;
Fig. 5 is the measuring system sketch map of weigh-bed in the embodiment of the invention two;
Fig. 6 is a position monitoring schematic flow sheet among the embodiment of the invention one and two.
The specific embodiment
Contrast accompanying drawing and the present invention is explained in detail below in conjunction with preferred embodiment.
A kind of method of utilizing weigh-bed to carry out the position monitoring, described weigh-bed comprises a body, support frame, the a plurality of fulcrums that LOAD CELLS is installed respectively that between bed body and support frame, are provided with, the electrical signal conversion with described LOAD CELLS that is connected with described LOAD CELLS becomes the circuit module of weighing of weight information, and the processing unit that is connected with the described circuit module of weighing, utilize the load of detected each fulcrum and the coordinate parameters of each fulcrum, calculate the center of gravity of measurand on the described bed body, by the variation track of continuous measurement monitoring center of gravity, thereby realization is to the monitoring of bed person's position and variation thereof.
A kind of weigh-bed with position monitoring function, comprise that a body, support frame, a plurality of fulcrums that LOAD CELLS is installed respectively that are provided with, the electrical signal conversion with described LOAD CELLS that is connected with described LOAD CELLS become the circuit module of weighing of weight information between bed body and support frame, and the processing unit that is connected with the described circuit module of weighing, described processing unit comprises computing module and position monitoring judge module, and described computing module is connected with described position monitoring judge module with the described circuit module of weighing respectively; Described computing module calculates the barycentric coodinates of measurand with respect to the coordinate position of preset coordinate system according to received weight information and each LOAD CELLS; Described position monitoring judge module is used for original state and barycentric coodinates and the variation thereof according to measurand, judges the position and the variation thereof of measurand.
Embodiment one
Specifically, as shown in Figure 1, described weigh-bed with position monitoring function, comprise a body and support frame, the bed body comprises bed surface 5, and the upper strata framework 2 of support bed surface 5, between bed body and support frame, be provided with a plurality of fulcrums that LOAD CELLS 4 is installed respectively, fulcrum has three at least, the accuracy that obtains reliable and stable support between feasible bed body and the support frame and guarantee to measure, preferred fulcrum is four, four LOAD CELLSs 4 on it are provided with on support frame symmetrically, rectangular distribution, an end of each LOAD CELLS 4 is connected on the upper strata framework 2 by bolt 7, and the other end is connected on the support frame 1 by bolt 7, support frame 1 bottom is provided with four scroll wheels 3, so that weigh-bed is mobile.As shown in Figure 2, the summation of the power of being carried on four LOAD CELLSs 4 equals a body and goes up appendicular weight.
Core of the present invention is the analysis of bed surface load center of gravity calculation, the primary condition of implementing the center of gravity analysis is the load independent measurement of each fulcrum, implementing the method that each point load independently measures can realize by measuring system, as shown in Figure 4, measuring system is a parallel measuring system in the present embodiment, each LOAD CELLS is joined the circuit module of weighing, specifically, it comprises four circuit modules 9 of weighing, be connected one by one with each LOAD CELLS 4 respectively, certain with the processing unit 11(that the circuit module 9 of weighing is connected, also the circuit module of weighing can be integrated in the processing unit to realize function corresponding), and can be between each element in the display terminal 13(measuring system that is connected with processing unit 11) by wired or wireless connection, LOAD CELLS 4 is used for the load on the perception bed body, the signal of telecommunication that the circuit module 9 of weighing changes load changes weight information into and sends processing unit 11 to, comprise computing module 11a and position monitoring judge module 11b in the processing unit 11, computing module 11a accumulation calculating bed person's gross weight is also carried out barycentric coodinates and is calculated, position monitoring judge module 11b is according to certain logical analysis, monitoring bed person's position and variation thereof show (bed person's gross weight and barycentric coodinates also can show by display terminal 13 certainly) with the result by display terminal 13 at last.
Specifically, as shown in Figure 6, utilize weigh-bed to carry out the method that position detects, comprise the steps:
1) zero clearing:, when promptly measuring, the initial load on the bed body as system zero point, is measured the load of measurand on this basis with the LOAD CELLS zero clearing.
2) measure load: under the control of processing unit 11,, and become weight information to send processing unit 11 to the electrical signal conversion of load by the circuit module 9 of weighing by the load on each fulcrum of LOAD CELLS 4 perception.
3) calculate barycentric coodinates: according to the mechanical analyzing method under the poised state, according to the load of each fulcrum and each fulcrum coordinate position with respect to preset coordinate system, calculate the barycentric coodinates of measurand, barycentric coodinates (X, Y) are determined by following formula: X=
, Y=
, in the formula, Fi is the load of i fulcrum, and Xi and Yi are respectively abscissa and the vertical coordinate of i fulcrum with respect to preset coordinate system, are algebraic value, and n is the number of fulcrum, n 〉=1.
4) the position monitoring is judged: according to detected person's original state and position of centre of gravity and variation thereof, judge detected person's position and variation thereof.
In step 2) and 3) between can also comprise the steps: to calculate full payload, promptly the computing module 11a in the processing unit 11 is by accumulative total step 2) in each fulcrum on load obtain the full payload of measurand, the computing formula of full payload is: F=
In a preferred embodiment, utilize the above-mentioned weigh-bed that four LOAD CELLSs have been installed to carry out the method that position is monitored, because four LOAD CELLSs 4 distribute symmetrically, as shown in Figure 3, with four planar geometric centers in LOAD CELLS 4 places is the horizontal coordinate initial point, four LOAD CELLS position coordinateses are respectively (X1, Y1), (X2, Y2), (X3, Y3), (X4, Y4), wherein the absolute value of abscissa equates to be lx, the absolute value of vertical coordinate equates to be ly, the load increment that measures on four LOAD CELLSs 4 is respectively F1, F2, F3, F4, according to above formula, the full payload and the barycentric coodinates that can obtain on the bed surface are as follows respectively:
Full payload:
F?=?F1?+?F2?+?F3?+?F4;
Barycentric coodinates:
X?=?[(F1+F2)-(F3+F4)]·lx?/F
Y?=?[(F1+F3)-(F2+F4)]·ly?/F
By continuous dynamic monitoring record, can realize body weight and position variation carrying out monitoring analysis and judgement to bed person to full payload F and barycentric coodinates X, Y.
The center of gravity of human body depends on the bodily form, position and body posture, and for certain people, body's center of gravity just only depends on body posture and position.When patient lies in bed transfixion, its position of centre of gravity will remain unchanged, when actions such as patient does rollover, stands up, mobile upper and lower extremities position, the variation of centre of body weight will be attended by, this variation can be reflected on the load variations of each the LOAD CELLS fulcrum of bearing structure that supports bed surface, in above preferred embodiment, during the patient posture change, the relative size that shows as four load F1, F2, F3, F4 on the pick off 4 is changed, in the variation of present barycentric coodinates X of final body and Y.During system works, the variation of four LOAD CELLS 4 continuous detecting F1, F2, F3, F4, processing unit 11 calculates barycentric coodinates (X, Y) continuously, obtain centre-of-gravity path, and the different position variation track models that obtain according to experiment statistics are (in the practice, position variation track model can be set up by actual center of gravity test experience), judgement bed person's position situation of change.Such as, suppose the X-axis forward of bed person's head at bed, original state is to lie on the back, and is to move along the Y-axis forward when detecting centre-of-gravity path, can judge that then patient stirs work doing the right side; Move in the other direction along X-axis if measure barycenter trajectory, can judge that patient is doing the action that sits up.
Embodiment two
Be with the difference of embodiment one: implement method that each point load independently the measures measuring system by as shown in Figure 5 and realize, whole system only is equipped with the circuit module 9 of weighing, each LOAD CELLS 4 is connected with the described circuit module 9 of weighing by a multidiameter option switch 14 respectively, and the load of each LOAD CELLS 4 fulcrums is measured in scan round.
More than two embodiment adopted four LOAD CELLS fulcrums, it is a more stable supported design mode, but realize that the method that weight and center of gravity detect is not limited to four LOAD CELLS fulcrum supporting way, the parallel force system that three fulcrums, five fulcrums or more fulcrum dynamometry constitute can be realized above-mentioned functions.
More than four LOAD CELLSs 4 of two embodiment arrange the relative bed surface geometric center symmetric arrangement mode that adopted, the coordinate distance of four LOAD CELLSs 4 is identical, but realize the structural design that is not limited to symmetric arrangement of function of the present invention, the arrangement of only the coordinate parameters substitution corresponding mechanics computing formula of the LOAD CELLS strong point need being derived when arranging as asymmetric, not equidistant LOAD CELLS gets final product.
The described detection system of the embodiment of the invention can continuous detecting bed patient center of gravity variation, according to the different mode that center of gravity moves, can judge bed person's position change type.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, make some being equal to substitute or obvious modification, and performance or purposes are identical, all should be considered as belonging to protection scope of the present invention.
Claims (9)
1. one kind is utilized weigh-bed to carry out the method that position is monitored, described weigh-bed comprises a body, support frame, the a plurality of fulcrums that LOAD CELLS is installed respectively that between bed body and support frame, are provided with, the electrical signal conversion with the load of described LOAD CELLS perception that is connected with described LOAD CELLS becomes the circuit module of weighing of weight information, and the processing unit that is connected with the described circuit module of weighing, it is characterized in that: utilize the load of detected each fulcrum and the coordinate parameters of each fulcrum, calculate the center of gravity of measurand on the described bed body, by the variation track of continuous measurement monitoring center of gravity, thereby realization is to the monitoring of bed person's position and variation thereof.
2. position monitoring method as claimed in claim 1 is characterized in that, comprises the steps:
1) measure load: under the control of processing unit, the load on described each fulcrum of LOAD CELLS perception, and become weight information to deliver to described processing unit the electrical signal conversion of load by the circuit module of weighing;
2) calculate barycentric coodinates: described processing unit calculates the barycentric coodinates of measurand with respect to the coordinate position of preset coordinate system according to the load on described each fulcrum and each fulcrum;
3) the position monitoring is judged: according to original state and the barycentric coodinates and the variation track thereof of measurand, judge the position and the variation thereof of measurand.
3. the method for position monitoring as claimed in claim 2, it is characterized in that: the method for parallel measurement is adopted in the measurement of described step 1) central bearing point load, described fulcrum is at least three, the LOAD CELLS at each fulcrum place is equipped with the circuit module of weighing, described LOAD CELLS on each described fulcrum and the described circuit module of weighing connect one to one respectively, measure the load of each fulcrum simultaneously.
4. the method for position monitoring as claimed in claim 2, it is characterized in that: the measuring method of scan round is adopted in the measurement of described step 1) central bearing point load, described fulcrum is at least three, the described circuit module quantity of weighing is one, described LOAD CELLS on each described fulcrum is connected with the described circuit module of weighing by a multidiameter option switch respectively, and the load of each fulcrum is measured in circulation.
5. the method for position monitoring as claimed in claim 2 is characterized in that: also comprised zero clearing before described step 1), before promptly using, the initial load on the described bed body as zero point, is measured on this basis.
6. weigh-bed with position monitoring function, the electrical signal conversion with described LOAD CELLS that comprise a body, support frame, be provided with a plurality of fulcrums that LOAD CELLS is installed respectively between bed body and support frame, is connected with described LOAD CELLS becomes the circuit module of weighing of weight information, and the processing unit that is connected with the described circuit module of weighing, it is characterized in that:
Described processing unit comprises computing module and position monitoring judge module, and described computing module is connected with described position monitoring judge module with the described circuit module of weighing respectively;
Described computing module calculates the barycentric coodinates of measurand with respect to the coordinate position of preset coordinate system according to received weight information and each LOAD CELLS;
Described position monitoring judge module is used for original state and barycentric coodinates and the variation thereof according to measurand, judges the position and the variation thereof of measurand.
7. the weigh-bed with position monitoring function as claimed in claim 6, it is characterized in that: described LOAD CELLS quantity is at least three, the described circuit module quantity of weighing is at least three, and described LOAD CELLS and the described circuit module of weighing connect one to one respectively.
8. the weigh-bed with position monitoring function as claimed in claim 6, it is characterized in that: described LOAD CELLS quantity is at least three, the described circuit module quantity of weighing is one, and described each LOAD CELLS is connected with the described circuit module of weighing by a multidiameter option switch respectively.
9. as claim 7 or 8 described weigh-beds with position monitoring function, it is characterized in that: also comprise display terminal, described display terminal is connected with described processing unit.
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CN103714658A (en) * | 2013-12-06 | 2014-04-09 | 广州顶毅电子有限公司 | Nursing system and method of intelligent bed for the aged |
CN104555823A (en) * | 2014-07-25 | 2015-04-29 | 嘉兴海格力思电子科技有限公司 | Manual hydraulic carrying vehicle capable of weighing |
CN109414223A (en) * | 2016-05-20 | 2019-03-01 | 美蓓亚三美株式会社 | Biont information monitors system |
CN109475322A (en) * | 2016-05-17 | 2019-03-15 | 美蓓亚三美株式会社 | Respiratory waveform trace system |
CN109528159A (en) * | 2018-10-24 | 2019-03-29 | 浙江大学 | A kind of sleep quality and respiration monitoring system and method based on bed body |
CN109549628A (en) * | 2018-11-28 | 2019-04-02 | 芯海科技(深圳)股份有限公司 | Portable type measurement unit and degree of balance measurement method of parameters based on the device |
CN112924007A (en) * | 2021-01-19 | 2021-06-08 | 重庆火后草科技有限公司 | Weight measurement method based on target sleep |
CN113091868A (en) * | 2021-04-07 | 2021-07-09 | 滨州医学院烟台附属医院 | Movable weighing device for bedridden patient |
CN113982274A (en) * | 2021-11-19 | 2022-01-28 | 中铁十七局集团第五工程有限公司 | Fulcrum setting method of cast-in-place concrete support structure |
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CN103714658B (en) * | 2013-12-06 | 2017-01-25 | 广州顶毅电子有限公司 | Nursing system and method of intelligent bed for the aged |
CN103714658A (en) * | 2013-12-06 | 2014-04-09 | 广州顶毅电子有限公司 | Nursing system and method of intelligent bed for the aged |
CN104555823A (en) * | 2014-07-25 | 2015-04-29 | 嘉兴海格力思电子科技有限公司 | Manual hydraulic carrying vehicle capable of weighing |
CN109475322B (en) * | 2016-05-17 | 2019-12-31 | 美蓓亚三美株式会社 | Respiratory waveform delineation system |
CN109475322A (en) * | 2016-05-17 | 2019-03-15 | 美蓓亚三美株式会社 | Respiratory waveform trace system |
US10617326B2 (en) | 2016-05-17 | 2020-04-14 | Minebea Mitsumi Inc. | Respiration waveform drawing system |
CN109414223A (en) * | 2016-05-20 | 2019-03-01 | 美蓓亚三美株式会社 | Biont information monitors system |
CN109528159B (en) * | 2018-10-24 | 2020-08-14 | 浙江大学 | Human sleep and respiration monitoring system and method based on bed body |
CN109528159A (en) * | 2018-10-24 | 2019-03-29 | 浙江大学 | A kind of sleep quality and respiration monitoring system and method based on bed body |
CN109549628A (en) * | 2018-11-28 | 2019-04-02 | 芯海科技(深圳)股份有限公司 | Portable type measurement unit and degree of balance measurement method of parameters based on the device |
CN112924007A (en) * | 2021-01-19 | 2021-06-08 | 重庆火后草科技有限公司 | Weight measurement method based on target sleep |
CN113091868A (en) * | 2021-04-07 | 2021-07-09 | 滨州医学院烟台附属医院 | Movable weighing device for bedridden patient |
CN113982274A (en) * | 2021-11-19 | 2022-01-28 | 中铁十七局集团第五工程有限公司 | Fulcrum setting method of cast-in-place concrete support structure |
CN113982274B (en) * | 2021-11-19 | 2022-11-15 | 中铁十七局集团第五工程有限公司 | Fulcrum setting method of cast-in-place concrete support structure |
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