CN110389383A - One kind is for detecting method and system existing for patient - Google Patents
One kind is for detecting method and system existing for patient Download PDFInfo
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- CN110389383A CN110389383A CN201910320312.3A CN201910320312A CN110389383A CN 110389383 A CN110389383 A CN 110389383A CN 201910320312 A CN201910320312 A CN 201910320312A CN 110389383 A CN110389383 A CN 110389383A
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000012544 monitoring process Methods 0.000 claims abstract description 67
- 230000004044 response Effects 0.000 claims abstract description 50
- 238000012360 testing method Methods 0.000 claims abstract description 31
- 230000002745 absorbent Effects 0.000 claims abstract description 24
- 239000002250 absorbent Substances 0.000 claims abstract description 24
- 238000001514 detection method Methods 0.000 claims description 39
- 239000003990 capacitor Substances 0.000 claims description 37
- 230000007547 defect Effects 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 4
- 239000012212 insulator Substances 0.000 claims description 3
- 238000001574 biopsy Methods 0.000 claims 1
- 239000004020 conductor Substances 0.000 description 59
- 238000013461 design Methods 0.000 description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 15
- 239000002800 charge carrier Substances 0.000 description 9
- 230000010355 oscillation Effects 0.000 description 9
- 230000035945 sensitivity Effects 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 6
- 150000003839 salts Chemical class 0.000 description 6
- 239000012530 fluid Substances 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 206010012289 Dementia Diseases 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000000474 nursing effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 206010021639 Incontinence Diseases 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000003466 anti-cipated effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000013872 defecation Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000027939 micturition Effects 0.000 description 2
- 239000004584 polyacrylic acid Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 206010040880 Skin irritation Diseases 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013481 data capture Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000029142 excretion Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
- 238000005213 imbibition Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000036556 skin irritation Effects 0.000 description 1
- 231100000475 skin irritation Toxicity 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
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- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Remote Sensing (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Geology (AREA)
- Geophysics (AREA)
- Electromagnetism (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Absorbent Articles And Supports Therefor (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
Abstract
This application discloses one kind for detecting method and system existing for patient.The system comprises the equipment being attached on absorbent article is arranged to, the equipment is used to detect the moisture at the absorbent article and including the resonance circuit with moisture-sensitive part.When moisture-sensitive is partially in dry condition, resonance circuit at least has the first resonance frequency, and when moisture-sensitive is partially in damp condition, resonance circuit at least has the second resonance frequency.The system also includes monitoring unit, the monitoring unit is arranged to: test signal being sent to the equipment, and judges that patient whether there is based on the response signal from the equipment.
Description
Technical field
Present invention is generally directed to detection patients to exist.Specifically, patient on bed is detected using water content detection to exist.
It is deposited more particularly it relates to detect patient on bed using the system and method for detecting the moisture at absorbent article
In.
Background technique
Detection patient, which exists, to be important, and the patient for being especially diagnosed with dementia exists, which may lead
Cause get lost with it is clouding of consciousness.Therefore, (for example, in patient during the period that can not have staff on the scene in one day
Resting or bed rest time during sleep during), monitoring patient exist is important.
Current solution is usually individual solution, these solutions are expensive and may be considered pair
Patient causes to bother.
Therefore, it needs in the prior art a kind of for detecting solution convenient, reliable and economic existing for patient.
Summary of the invention
In view of above content, the object of the present invention is to provide one kind to improve system and method for detecting existing for patient.
Especially using the equipment of the water content detection for absorbent article.
According to the disclosure in a first aspect, describing a kind of for detecting system existing for patient.The system includes by cloth
It is set to the equipment for detecting the moisture at the absorbent article being attached on absorbent article.The equipment may include having
The resonance circuit of moisture-sensitive part, wherein when moisture-sensitive is partially in dry condition, resonance circuit can at least have
First resonance frequency, and when moisture-sensitive is partially in damp condition, resonance circuit can at least have the second resonance frequency.
The system can also include monitoring unit, which, which is arranged to the equipment, sends test signal, and is based on coming from
The response signal of equipment judges that patient whether there is.
In an example of system, the defect of the response signal detected by monitoring unit can indicate that patient does not exist.
Optionally, the signal detected be not from the equipment for detecting the moisture at absorbent article expected response signal it
One.
In an example of system, monitoring unit, which will be configured to the judgement that patient may be not present, to warn
The number of notifying is sent to receiving unit.In some replacements and/or additional example, monitoring unit can send signal to receiving unit
To indicate that patient exists.
In an example of system, alarm signal can star monitoring system, the monitoring system may be configured to
Receiving unit sends checking signal (such as picture signal and/or voice signal).
In another aspect of the present disclosure, a kind of method existing for detection patient is described.This method includes by water content detection
Equipment is arranged on absorbent article.The equipment may include the resonance circuit with moisture-sensitive part.When moisture-sensitive portion
When dividing in dry condition, resonance circuit can have the first resonance frequency, and when moisture-sensitive is partially in damp condition,
Resonance circuit can have the second resonance frequency.This method further include: test signal is sent to the equipment, from the equipment
Response signal is received, and judges that patient whether there is based on response signal.
According to one aspect of the disclosure, a kind of system for detecting the moisture at absorbent article is provided, this is
System may include being arranged to the equipment being attached on absorbent article.The equipment may include have moisture-sensitive part humorous
Shake circuit, wherein and when moisture-sensitive is partially in dry condition, resonance circuit has the first resonance frequency, and when moisture is quick
When sense is partially in damp condition, resonance circuit has the second resonance frequency.The system can also include monitoring unit, by cloth
It is set to for sending test signal to the equipment, from equipment reception response signal, determines the frequency of response signal, and
If identified frequency corresponds to the second resonance frequency, detection signal is generated.
According to an example, which be can be arranged for detecting at absorbent article, absorbent article
Or the moisture in absorbent article.Absorbent article can be diaper, incontinence garment, sanitary napkin, tapon, bandage, on bed
Any one in protective articles etc..
In this context, dry condition may relate to be not in the presence of dirt at the equipment.In addition, moist
Situation may relate to dirt be wherein in the presence of.Due to urination, defecation or other body excretions, dirt may be moisture
Or the release of fluid.
By the way that the equipment having dependent on the first resonance frequency and the second resonance frequency existing for moisture, Ke Yike is arranged
Moisture is detected by ground.In addition, the frequency by determining response signal, detection may be to for example due between the equipment and antenna
Variation distance caused by input signal signal strength in variation or inhibit test signal and response signal letter
Object relative insensitivity in number path.
In addition, by generating detection signal based on the presence for the signal for being in the second resonance frequency, can to avoid due to
Lack the equipment in absorbent article and generates erroneous detection signal.
By utilizing the response signal (defect of such as response signal) detected may be with patient not in monitoring unit
It is associated at position in range, can provides for detecting cheap and simple system existing for patient.Patient is detected to exist
Be important, for example, patient rest or sleep when bed rest time during and such as care-giver staff not phase
Between.For being diagnosed with the patient of dementia (dementia may cause get lost with clouding of consciousness), may especially need
Monitor and determine that patient exists.
Described system provides a kind of for monitoring or being determined existing for patient in the case where no other equipment
Cheap and effective method.By the way that the equipment to be attached on absorbent article, the equipment can be with the smallest adaptability
And it is used in multiple and different absorbent articles.For example, the equipment can pass through sewing, suture, bonding or similar fashion
To adhere to.Therefore, described system does not need special or customization absorbent article.Another advantage is that the equipment can be with
It is arranged on the different location of absorbent article.Therefore, the sensitivity of detection can be changed based on individual.For example, inhaling
In the case that aqueous article is diaper, the equipment can be attached to the different location in diaper for different wearers
On.
According to an example, the equipment includes tissue layer.Tissue layer can be set in the equipment towards suction
The outer layer of the wearer of aqueous article.This can increase the comfort level of wearer.
According to an example, moisture-sensitive part includes the water absorption layer for being arranged to absorb moisture.By absorbing moisture, moisture
Moisture-sensitive part can be retained in.Therefore the frequency shift (FS) from the first resonance frequency to the second resonance frequency can be kept
(shift), to may also detect that moisture for a period of time after moisture has discharged in absorbent article.
According to an example, water absorption layer includes polymer.
Particularly, polymer can be polyacrylic acid.According to an example, which includes covering resonance circuit at least
The damp-proof layer of a part.Particularly, damp-proof layer does not cover at least part of moisture-sensitive part.Damp-proof layer prevents moisture-sensitive
Circuit block and contact with moisture other than part, and therefore prevent uncertain resonance frequency shift.
According to an example, moisture-sensitive part is arranged in the resonance frequency of resonance circuit under damp condition from
One resonance frequency shift to the second resonance frequency.Particularly, moisture-sensitive part can be by being presented first under dry condition
Capacitor and the second capacitor is presented under damp condition to provide the frequency shift (FS).
According to an example, moisture-sensitive part includes two conductors separated by insulator.Two conductors can be parallel
Arrangement.Under dry condition, two conductors can provide capacitance contribution to resonance circuit.Under damp condition, fluid therein
(for example, water) and any electric charge carrier (for example, ion) can reduce the impedance between two conductors.It is possible thereby to by resonance frequency
Rate is from the first resonance frequency shift to the second resonance frequency.
According to an example, two conductors form interdigitated fingers structure.This architecture provides multiple parallel conductors simultaneously
And so that the equipment can have big moisture-sensitive area and to moist high sensitive.
According to an example, the equipment includes the electric insulation layer with the first side and second side, two of them conductor quilt
It is arranged on the first side, and moisture-sensitive part further includes third conductor, which is arranged on and two conductor phases
Pair second side on and be arranged to and coupled with two capacitance of conductor.Therefore, moisture-sensitive part can be presented: be set to
The first capacitor between two conductors on side, first in third conductor and two conductors being set on the first side
The second capacitor between conductor, and between second conductor in third conductor and two conductors being set on the first side
Third capacitor.Therefore under dry condition, the resonance frequency of resonance circuit can be by the second capacitor and the with series connection
Any other for the first capacitor and resonance circuit that three capacitors are connected in parallel inductively or capacitively limits.However, in moist shape
Under condition, the resonance frequency of resonance circuit can mainly by resonance circuit these other inductively or capacitively limit.As a result, can be with
It realizes from the first resonance frequency under dry condition to the reliable offset of the second resonance frequency under damp condition.The disclosure
Equipment design especially suitable for the water content detection based on frequency according to the design.
According to an example, which includes the substance being arranged at two conductors of setting on the first side, which exists
Electric charge carrier is formed when dissolution.These electric charge carriers can increase the sensitivity of the equipment.Particularly, which can be
Salt, such as sodium chloride.
According to an example, the resonance circuit includes inductor and capacitor,
According to an example, the test signal includes at least one pulse.By sending pulse test signal, can drop
The power consumption of low monitoring unit.
According to an example, the first resonance frequency is except the frequency band of test signal or bandwidth.According to the example, described to set
It is standby strong response to be made to test signal under damp condition.This can reduce the risk of error detection.
According to alternative exemplary, first frequency is in the frequency band of test signal or bandwidth.According to the example, the equipment can be with
Test signal is made a response under two kinds of situations of damp condition and dry condition.The shorter pulse length of alternate embodiment is anticipated
Taste the reduced power consumption of monitoring unit.
According to an example, which further includes the antenna for being connected to monitoring unit.Test signal is sent via antenna.Separately
Outside, response signal can be received via antenna.Therefore, antenna can be used to send test signal and receive from the equipment
Response.This can simplify the cost for handling and reducing system of system.
According to an example, monitoring unit is arranged to the residual oscillation reduced in antenna, the vibration generated by test signal
It swings.This can be in order to detecting the response signal from the equipment and improve the reliability of water content detection.According to an example, prison
It surveys unit to be also arranged to: determining the envelope of response signal, and if the envelope is matched with reference envelope and if institute is true
The frequency of fixed response signal corresponds to the second resonance frequency, then generates detection signal.It is expected if received signal is presented
Envelope and there is frequency corresponding to the second resonance frequency, then can determine received signal may originate from the equipment and
It is not derived from any other source.It therefore can be to avoid the error detection due to caused by the noise at the second resonance frequency.
According to the second aspect of the design, provide a kind of for detecting at the equipment being attached on absorbent article
The method of moisture, the equipment include the resonance circuit with moisture-sensitive part, when moisture-sensitive is partially in dry condition
When, resonance circuit has the first resonance frequency, and when moisture-sensitive is partially in damp condition, resonance circuit is humorous with second
Vibration frequency.This method comprises: test signal is sent to the equipment, response signal is received from the equipment, determines response letter
Number frequency, and if identified frequency correspond to the second resonance frequency, generate detection signal.
Details and advantage about first aspect discussion are accordingly suitable for second aspect, to can refer to front herein
Discussion.
Detailed description of the invention
With reference to attached drawing, by being retouched in detail to the illustrative and non-limiting of the preferable example of present invention description design below
It states, is better understood with the above-mentioned and additional objects, features and advantages of present inventive concept, herein identical appended drawing reference
It will be used for identical element, in which:
Fig. 1 shows the exemplary system for detecting the moisture in diaper according to the design, system described herein
System, which can be utilized to detection patient, to be existed.
Fig. 2 a and Fig. 2 b respectively illustrate the upper side and lower side of the exemplary equipment according to the design.
Fig. 2 c and Fig. 2 d respectively illustrate the exemplary resonance circuit in dry condition according to the design and are in
The resonance circuit of damp condition.
Fig. 3 a and Fig. 3 b respectively illustrate the upper side and lower side of the equipment of the alternative exemplary according to the design.
Fig. 3 c and Fig. 3 d respectively illustrate resonance circuit according to the alternative exemplary of the design in dry condition and
Resonance circuit in damp condition.
Fig. 4 is according to the exemplary for detecting the flow chart of the method for moisture of the design, and the method can be sharp
Exist for detecting patient.
Specific embodiment
Following embodiment will be described about diaper.However, the design is also equally applicable to other types of water imbibition object
Product, for example, protective articles etc. on incontinence garment, sanitary napkin, tapon, bandage or bed.
It is exemplary for detecting the system 1 of the moisture in diaper that Fig. 1 shows first conceived according to the present invention.It will hold
It carries and illustrates the first exemplary system 1 under the background for wearing the bed 2 of patient 3 of diaper 4.System 1 includes for detecting in diaper 4
The equipment 5 of moisture.System 1 further includes monitoring unit 6 and antenna 7.Monitoring unit 6 is connected to antenna 7.By monitoring unit 6 from setting
Standby 5 signals (defect of such as signal) detected can be used to detect at the position in the detection range of monitoring unit 6
Patient exists.Optionally, the signal detected is not from one in the expected response signal of equipment 5.
Fig. 2 a and Fig. 2 b illustrate in greater detail equipment 5.Equipment 5 is provided in the form of transponder label.Equipment 5 includes
Bottom surface has the flexible carrier of binder (in order to improve clearness, the flexible carrier is omitted in Cong Tuzhong).Therefore, equipment 5 can
To be easily attached in diaper 4.Equipment 5 is preferably affixed at the following position in diaper: so that equipment 5 is in 3 row of patient
It is got wet in the case where urine or defecation.Equipment 5 includes electric insulation layer 9, such as plastic foil.Insulating layer 9 is arranged on the upside of carrier.
Insulating layer 9 can be coextensive with carrier.Equipment 5 further includes resonance circuit 10 and moisture-sensitive part 13.10 He of resonance circuit
Moisture-sensitive part 13 is arranged on insulating layer 9.For example, resonance circuit 10 can be and according to principle well known in the art
Etch away the part for the thin metal layer being arranged on insulating layer 9 selectively to be formed.
With reference to Fig. 2 a to Fig. 2 d, resonance circuit 10 and moisture-sensitive part 13 will be described in now.Resonance circuit 10 wraps
Include inductor 11 and capacitor 12.Inductor 11 is arranged on the first side of insulating layer 9.Capacitor 12 is by being arranged in insulating layer
9 two conductive surface 12' on opposite sides, 12 " are formed.Inductor 11 is connected on the first side that insulating layer 9 is arranged in
Condenser armature.Preferably, first side is to wearer.
Equipment 5 further includes the damp-proof layer 16 for covering the inductor 11 and capacitor 12 of resonance circuit 10.Damp-proof layer 16 prevents
Moisture is contacted with inductor 11 and capacitor 12.In some instances, damp-proof layer 16 covers two opposite sides, to make equipment 5
It is fully sealed and the moisture far from moisture-sensitive part 13.
Equipment 5 further includes the outer tissue layer of the side towards patient 3 of overlay device 5 (in order to improve the clearness of figure, quilt
Omit) so that minimal skin irritation.
As shown in Figure 2 a, moisture-sensitive part 13 includes two groups of 14 Hes of conductor being arranged on the first side of insulating layer 9
14'.Two groups of conductors 14,14' form interdigitated fingers structure.Two groups of conductors 14,14' conductive fingers parallel to each other set
It sets.Two groups of conductors 14 and 14' points are opened by insulator (such as air or dielectric).The quantity of finger-shaped material, finger-shaped material
The interval of length and finger-shaped material can size according to such as concrete application, the sensitivity of equipment 5 or equipment 5 etc. and change.
Moisture-sensitive part 13 further includes the conductive layer 15 being arranged in second side of insulating layer 9.Conductive layer 15 and two groups
Conductor 14,14' are oppositely disposed.Therefore, at least part of conductive layer 15 directly facing two groups of conductors 14,14'.Two groups of conductors
14 and 14' is connected to resonance circuit 10.More specifically, first group of conductor is connected to inductor 11.Second group of conductor is connected to electricity
Container panel.Conductive layer 15 is not connect with 10 electric current of resonance circuit.By the way that the conductive layer opposite with two groups of conductors 14 and 14' is arranged
15, conductive layer 15 can be coupled with every group of capacitance of conductor in two groups of conductors 14 and 14.
In the case where two groups of conductors 14 and 14' are dry (that is, moisture-sensitive is partially in dry condition), substantially not
In the presence of the free charge carrier for carrying the electric current between two groups of conductors 14 and 14'.As a result, the formation capacitor of moisture-sensitive part 13 is
The capacitor of Ca is connected in parallel with the capacitor for two series connections that capacitor is Cb and Cc, and wherein Ca is two groups of conductors 14
Capacitor between 14', Cb is the capacitor between first group of conductor and conductive layer 15, and Cc is second group of conductor and conductive layer
Capacitor between 15.This shows in figure 2 c.
In addition to this, the height extension of two groups of conductors 14 and 14' of 9 top of Ca and insulating layer is directly proportional, and with two groups
Interval between conductor 14 and the finger-shaped material of 14' is inversely proportional.In addition to this, Cb and Cc is led with conductive layer 15 and first group respectively
The surface area of body and second group of conductor in the plane of insulating layer 9 is directly proportional, and with conductive layer 15 with first group of conductor and the
Interval (that is, thickness of insulating layer 9) between two groups of conductors is inversely proportional.According to the first example, height, which extends, is much smaller than surface area,
And the thickness of insulating layer 9 is much smaller than the interval between two groups of conductors 14 and 14'.Therefore, compared with Cb and Cc, Ca is relatively small.
From resonance circuit 10, therefore moisture-sensitive part 13 acts approximately as the capacitor Cb and Cc of two series connections.Therefore, in drying
Under situation, the resonance frequency of resonance circuit 10 is mainly by the capacitor with three series connections (that is, the capacitor and electricity of capacitor 12
Holding Cb and Cc) inductance of inductor 11 that is connected in series limits.
When equipment 5 and contact with moisture, moisture will permeate outer tissue layer and contact with two groups of conductors 14 and 14'.Then, it deposits
It is that any electric charge carrier in fluid can generate current conduction path between two groups of conductors 14 and 14'.Therefore, it leads for two groups
Impedance between body 14 and 14' will reduce.If there is the electric charge carrier of sufficient amount, then moisture-sensitive part 13 will with Cb and
Low impedance current path is presented between the two groups of conductors 14 and 14' of Cc parallel connection.This shows in figure 2d, wherein capacitor Ca by
Short circuit replaces.
Therefore, under abundant moist situation, resonance circuit 10 will be presented mainly by company of connecting with the capacitor of capacitor 12
The inductance of the inductor 11 connect is come the resonance frequency that limits.The resonance frequency will be less than the resonance circuit 10 under dry condition
Resonance frequency.Therefore, when moisture-sensitive part 13 is exposed to moisture, the resonance frequency of resonance circuit 10 will be humorous from first
Vibration frequency is displaced to second resonance frequency lower than the first resonance frequency.
It should be understood that " short circuit " is corresponding expressions, because electric current will be presented to a certain degree in any conductive path in practice
Resistance.Therefore, in this context, it is no longer bright to be related to capacitor Cb and Cc in wherein moisture-sensitive part 13 for statement " short circuit "
The case where influencing the resonance frequency of resonance circuit 10 aobviously.
Can by two groups of conductors 14 and 14' provide salt (or in the case where humidity with similarity other
Substance) Lai Zengjia equipment 5 sensitivity.When salt and fluid contact, it will dissolve and formed electric charge carrier, this is potentially contributed to
Reduce the impedance between two groups of conductors 14 and 14'.
It is alternatively possible to provide water absorption layer at two groups of conductors 14 and 14'.Water absorption layer may include polymer, such as poly-
Acrylic acid.The water absorption layer can retain the fluid being discharged into diaper 4, and to increase the sensitivity of equipment 5.
According to another option, water absorption layer may include salt (or with other substances of similarity in the case where humidity)
To further increase the sensitivity of equipment 5.For example, 40% polymer and 60% salt to 60% polymer in some cases
Composition with 40% salt may be suitable ratio.
Back to the first example, when moisture-sensitive part 3 is in dry condition, the first resonance frequency is presented in resonance circuit 10
Rate, and when moisture-sensitive part 13 is in damp condition, it is humorous that second different from the first resonance frequency are presented in resonance circuit 10
Vibration frequency.
By sending resonant electromagnetic signal to resonance circuit 10, resonance circuit 10 will start to carry out resonance with its resonance frequency
Or oscillation.After electromagnetic signal has stopped, resonance circuit 10 will also be after persistent oscillation for a period of time.The oscillation will be generated to have and be pressed
The electromagnetism sinusoidal response signal for the amplitude envelope that index reduces.The response signal can be picked up by antenna 7 and by monitoring unit 6
To detect.
Therefore, damp condition can be determined based on the frequency of response signal.Preferably, select " detection frequency " as the
Two resonance frequencies.However, the application and desired sensitivity of water content detection are depended on, it is also an option that detection frequency is as first
Frequency between resonance frequency and the second resonance frequency.
For the ease of humidity detection, the first resonance frequency and the second resonance frequency are preferably partitioned into their presentations and do not weigh
The degree of folded frequency band.It is preferably chosen the inductance value and capacitor 12 and the capacitor of moisture-sensitive part 13 of inductor 11
Specific choice, so that the second resonance frequency is fallen into the free frequency band of license appropriate, and the first resonance frequency falls in the frequency band
Outside.
Fig. 1 is returned to, antenna 7 is arranged on bed 2.Antenna 7 can be set below the mattress of bed 2.Optionally, antenna 7
It can be set below the mattress cover of bed 2.
Optionally, antenna 7 can be set below the sheet of bed 2 or bedding.For all these alternative solutions, day
Line 7 is preferably provided in the center position of bed 2.Therefore, antenna 7 is configured in the relationship well limited with patient 3, and
Relatively close diaper 4 and equipment 5.Preferably, antenna 7 is arranged in polybag.This provides moisture protection, and in bed 2
Manufacture during can conveniently and wholesomely operate antenna 7.Preferably, antenna 7 is loop aerial.However, dependent on frequency band and
The selection of environment etc. can also use other kinds of antenna.Loop aerial is arranged in bed 2 in which can be convenient, to patient 3
Cause minimum discomfort.
Monitoring unit 6 is arranged on bed 2.Monitoring unit 6 may be mounted on bed 2.By the way that monitoring unit is arranged in bed
6, patient 3 can be monitored automatically and like a dream in the case where nursing staff undertakes minimum workload.Optionally, monitoring is single
Member 6 can be portable handheld unit, can be periodically arranged on bed 2 by nursing staff.Monitoring unit 6 includes transmitter electricity
Road, and be arranged to and periodically (for example, once every minute or every two minutes primary) to equipment 5 send test signal, and from
Equipment 5 receives response signal.Therefore equipment 5 serves as transponder.Monitoring unit 6 may include: for generating the signal to be sent
Waveform generator, the signal analysis component for analyzing received signal, for will from waveform generator number letter
Number it is converted into the DAC or other suitable circuit elements and for the received analog signal of institute to be converted into number of analog signal
The ADC of counterpart or other suitable circuit elements.
Monitoring unit 6 is arranged to generation and sends test signal.Testing signal includes a series of pulses.Preferably, it surveys
The centre frequency and pulse length of trial signal are selected so that the second resonance frequency is included in the bandwidth of test signal.That is,
Test signal includes the frequency component in the second resonance frequency.
According to the first example, the pulse length for testing signal is located at the first resonance frequency of resonance circuit 10 far away
It tests except the frequency band of signal.Therefore, when moisture detector device 3 is sufficiently moist, resonance circuit 10 can be in response to test
Signal and consumingly resonance.
Monitoring unit 6 is also arranged to monitor and detect the input signal from equipment 5.Monitoring unit 6 is also arranged to:
If receiving the signal of instruction moisture from equipment 5, instruction is generated.The instruction may include make monitoring unit 6 vision or
Audible indicator activation.Optionally, monitoring unit 6 may include based on wired communication equipment or wireless telecom equipment (for example,
Bluetooth, ZigBee, WLAN, GPRS, 3G, optical device, equipment based on sound etc.), by transmitting the message to based on networking
Calculation machine or other remote data capture equipment are to be further analyzed and store.
In addition, monitoring unit 6 is configured for judging that patient is based on the response signal detected from equipment
Within the no detection range for being present in monitoring unit 6 and equipment 5.In one example, it is detected by monitoring unit 6 from equipment 5
The defect of response signal may be instruction of the patient not in detection range.Optionally, the signal detected, which is not from, to be set
Standby 5 one of expected response signal.
If monitoring unit 6 detects that patient does not exist, monitoring unit 6 may be configured to generate and send instruction, all
Such as alarm signal.The instruction may include making the vision or audible indicator or the reception list in different location of monitoring unit 6
Vision or audible indicator activation at member.Receiving unit can be staff (such as nursing staff) calculating on the scene
Machine, mobile unit, mobile phone etc..In some substitutions and/or other example, monitoring unit can be sent to receiving unit
Signal is to indicate that patient exists.
In addition, in some instances, alarm signal can star monitoring system, which is configured for
Checking signal, such as picture signal and/or voice signal are sent to receiving unit.Monitoring system can be camera and/or Mike
Wind, and/or the other sensors against patient's arrangement.Monitoring system can be used to for example reach the position of patient in staff
Taking a step forward of setting verifies patient and does not exist.
Optionally, in some instances, the staff for receiving alarm signal can choose connection monitoring system, without
It is by alarm signal come turn on automatically monitoring system.
Monitoring unit 6 is also arranged to removal or at least reduces the residual oscillation in antenna 7.In more detail, monitoring unit 6
Calibration signal is sent before being arranged in transmission test signal.After having sent calibration signal, monitoring unit 6 measures antenna
Any residue signal oscillation present in 7, and be configured to its transmitter circuit based on the information to adapt to test signal, with
The effective attenuation of residual oscillation is obtained during measuring phases.Which increase the sensitivity of detection and reliabilities.
Monitoring unit 6 is arranged to the response monitored to test signal.Monitoring unit 6, which is arranged to, receives input signal simultaneously
Input signal is sampled.As previously mentioned, the amplitude of the response signal generated by equipment 5 is exponentially decayed.6 quilt of monitoring unit
It is arranged to determine the amplitude envelope of received signal and by it with predetermined value or envelope is (for example, based on theoretical model or elder generation
The expection envelope of preceding measurement) it is compared.Also it is derived from some other so as to judge that received signal is derived from equipment 5
Source.For example, monitoring unit 6 can be arranged the index of determining envelope and judge that the index of received signal whether there is
In preset range or desired extent.
According to the first example, monitoring unit 6 is also arranged to determine the frequency to determine response signal in response to positive envelope.
If the frequency of response signal corresponds to or matching detection frequency (it can be the second resonance frequency), detection signal is generated.
For example, frequency can be by executing Fourier analysis, by via to detect during frequency is to received signal
The heart bandpass filter transmitting signal or by the number of peaks to interim time carry out count or similar mode come
It determines.
By determining both envelope and frequency, the mistake due to caused by the noise at detection frequency can be effectively avoided and examine
It surveys.
According to alternative exemplary, envelope can be executed after frequency judgement and determined.
If only a small amount of water release into diaper 4, is present in the number of the electric charge carrier at two groups of conductors 14 and 14'
Amount may be not enough to resonance frequency shift to detection frequency.It that case, detection signal will not be generated.
Optionally, the signal level that monitoring unit 6 can be arranged the signal that will be received is compared with threshold value, with
Inhibit noise signal and possible weak response signal from equipment 5.It reduce the risks of error detection.
According to another option, monitoring unit 6 be can be arranged: if the frequency of identified response signal and detection frequency
Difference between rate is less than frequency threshold, then generates detection signal.Therefore, if the close enough detection frequency of the frequency of response signal
Rate then can detecte damp condition.
Hereinbefore, it has been mentioned that " dry condition " and " damp condition ".In general, being constantly present certain journey in air
The humidity of degree, therefore be also such in diaper 4 and equipment 5.It is especially true in the diaper of patient's dress, because by perspiring
Also some moisture can be discharged.Therefore, " dry condition " should be interpreted as corresponding to the diaper when not occurring dirt (for example, urination)
In 4 or equipment 5 at moisture content.In addition, " damp condition " should be interpreted as corresponding to occurred dirt (example wherein
Such as, urinate) diaper 4 in or equipment 5 at moisture content.
With reference to Fig. 4, will now be described according to the first exemplary method for detecting the moisture in diaper 4.Include:
Step 40, as previously described, monitoring unit 6 sends calibration signal, measures in antenna 7 by the residual of calibration signal generation
Remained shock is swung, its transmitter circuit is then correspondingly configured.
Step 42, monitoring unit 6 sends test signal.
Step 44, monitoring unit 6 monitors the response from equipment 5.
Step 46, if moisture-sensitive part 13 is in damp condition, resonance circuit 10 motivates signal-under-test simultaneously
And start with the oscillation of its resonance frequency.The oscillation generates the response signal received at monitoring unit 6.
Step 48, monitoring unit 6 analyzes response signal,.Determine the envelope of signal received and by itself and reference packet
Network is compared.In addition, determining the frequency of response signal.
Step 50, it if expected envelope is presented for response signal and identified frequency matches with detection frequency, supervises
It surveys unit 6 and generates the detection signal that instruction has detected that moisture,.If envelope determine or frequency judgement be it is negative, do not generate
Instruction.
Preferably, with period appropriate (for example, every 2 minutes or 5 minutes every) Lai Chongfu the method.
In some examples of this method, monitoring unit 6 is configured to response signal whether to judge patient
In the presence of.For example, the defect of the signal detected or it is not anticipated that response signal patient can be indicated in monitoring unit 5 and equipment
Except 5 range.Therefore, patient may not be at the position.
Fig. 3 a- Fig. 3 d shows the alternate design of equipment 5 and resonance circuit 10.According to the alternate design, first group of conductor
It is connected to inductor, and conductive layer 15 is connected to the second condenser armature.Second group of conductor is not galvanically connected to resonance circuit
10.Therefore, as illustrated in figure 3 c, under dry condition, the capacitor of moisture-sensitive part 13 will be mainly by conductive layer 15 and first
The capacitive coupling between conductor is organized to determine.
However, be present in moisture under damp condition (and/or setting is at two groups of conductors 14 and 14' and molten by moisture
Solution) any electric charge carrier will generate alternate conductive path between two groups of conductors 14 and 14'.Therefore, as shown in Figure 3 d,
Two groups of conductors 14 and 14' can form widened bonded conductor.Therefore, the capacitor of moisture-sensitive part 13 will by conductive layer 15 with
Capacitive coupling between widened bonded conductor determines.Since the area of widened bonded conductor is greater than the face of first group of conductor
Product, so the capacitor of moisture-sensitive part 13 will increase.Since moisture-sensitive part 13 is connected with inductor 11 and capacitor 12
Connection, so the area, which increases, will reduce the resonance frequency of resonance circuit 10.
According to another alternate design, first group of conductor may be coupled to capacitor 12, and conductive layer 15 may be coupled to
Inductor 11.
It therefore, can be in the first exemplary moisture detecting method using including any one in these alternate designs
The equipment 5 of resonance circuit 10.
Hereinbefore, the several examples of Primary Reference describe the present invention.However, as those skilled in the art are easy reason
Solution, other examples other than those described above example are equally possible in sheet as defined by the appended claims
In the range of inventive concept.
Claims (10)
1. one kind is used to detect system existing for patient, the system comprises:
Be arranged to the equipment being attached on absorbent article, the moisture for being used to detect at the absorbent article and including
Resonance circuit with moisture-sensitive part, wherein when the moisture-sensitive is partially in dry condition, the resonance circuit
At least there is the first resonance frequency, when the moisture-sensitive is partially in damp condition, the resonance circuit at least has the
Two resonance frequencies；And
Monitoring unit is arranged to: test signal being sent to the equipment, and based on the response letter from the equipment
Number judge that patient whether there is.
2. system according to claim 1, wherein the defect of the response signal detected by the monitoring unit indicates institute
Patient is stated to be not present.
3. according to claim 1 to system described in any one of 2, wherein the monitoring unit is configured to based on described
Judgement that patient is not present and alarm signal is sent to receiving unit.
4. system according to claim 3, wherein the alarm signal starts monitoring system, and the monitoring system is matched
It is set to the receiving unit and issues checking signal.
5. system according to claim 1, wherein the moisture-sensitive part has the first electricity under the dry condition
Hold, there is the second capacitor under the damp condition.
6. system according to claim 1, wherein the moisture-sensitive part includes that two separated by insulator lead
Body.
7. system according to claim 1, wherein the resonance circuit includes inductor and capacitor.
8. system according to claim 1, wherein the test signal includes at least one pulse.
9. system according to claim 1, wherein the monitoring unit is arranged to:
Determine the envelope of the response signal；And
If the envelope matches with reference envelope and if identified frequency corresponds to second resonance frequency, produce
Biopsy surveys signal.
10. a kind of method existing for detection patient, comprising:
Moisture detection apparatus is arranged on absorbent article, the equipment includes the resonance circuit with moisture-sensitive part,
When the moisture-sensitive is partially in dry condition, the resonance circuit has the first resonance frequency, when the moisture-sensitive
When being partially in damp condition, the resonance circuit has the second resonance frequency, which comprises
Test signal is sent to the equipment,
Response signal is received from the equipment,
Judge that patient whether there is based on the response signal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1850464-7 | 2018-04-20 | ||
| SE1850464 | 2018-04-20 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000079497A1 (en) * | 1999-06-21 | 2000-12-28 | Bent Thorning Bensen A/S | Radiofrequency resonant circuit sensing device, method of its production, and uses |
| WO2002052302A2 (en) * | 2000-12-22 | 2002-07-04 | Bent Thorning Bensen A/S | Sensing device, method of its production, and use |
| CN101496121A (en) * | 2006-07-10 | 2009-07-29 | 3M创新有限公司 | Inductive sensor |
| US20120216607A1 (en) * | 2009-10-07 | 2012-08-30 | Pampett Ab | Method and system for detecting moisture at an absorbent article |
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2019
- 2019-04-19 CN CN201910320312.3A patent/CN110389383A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000079497A1 (en) * | 1999-06-21 | 2000-12-28 | Bent Thorning Bensen A/S | Radiofrequency resonant circuit sensing device, method of its production, and uses |
| WO2002052302A2 (en) * | 2000-12-22 | 2002-07-04 | Bent Thorning Bensen A/S | Sensing device, method of its production, and use |
| CN101496121A (en) * | 2006-07-10 | 2009-07-29 | 3M创新有限公司 | Inductive sensor |
| US20120216607A1 (en) * | 2009-10-07 | 2012-08-30 | Pampett Ab | Method and system for detecting moisture at an absorbent article |
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