CN105853111B - Infant incubator real-time monitoring system - Google Patents
Infant incubator real-time monitoring system Download PDFInfo
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- CN105853111B CN105853111B CN201610169530.8A CN201610169530A CN105853111B CN 105853111 B CN105853111 B CN 105853111B CN 201610169530 A CN201610169530 A CN 201610169530A CN 105853111 B CN105853111 B CN 105853111B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G11/00—Baby-incubators; Couveuses
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G2200/00—Information related to the kind of patient or his position
- A61G2200/10—Type of patient
- A61G2200/14—Children
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G2200/00—Information related to the kind of patient or his position
- A61G2200/30—Specific positions of the patient
- A61G2200/32—Specific positions of the patient lying
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G2203/00—General characteristics of devices
- A61G2203/30—General characteristics of devices characterised by sensor means
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G2203/00—General characteristics of devices
- A61G2203/30—General characteristics of devices characterised by sensor means
- A61G2203/46—General characteristics of devices characterised by sensor means for temperature
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- Gynecology & Obstetrics (AREA)
- Pediatric Medicine (AREA)
- Pregnancy & Childbirth (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
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Abstract
The invention discloses a kind of infant incubator real-time monitoring system, belong to technical field of medical equipment, including data acquisition module, data processing module, data memory module, data disaply moudle, power module and wireless prompt, data acquisition module is used for detecting the humiture in incubator, data acquisition module connects data processing module, data processing module connects data memory module and data disaply moudle, power module connects data acquisition module, data processing module, data memory module and data disaply moudle, wireless prompt wireless connection data processing module, data processing module signal an alert is to wireless prompt, baby monitor personnel carry with wireless prompt.The present invention solves the problems, such as that incubator sends alarm and frightens baby, wireless prompt has the advantages of display alarm points, carry with, the situation that stand-by power supply reply powers off suddenly is also provided with, the integrated type sensor after a kind of improvement is also provided is and carries out data acquisition.
Description
Technical field
The invention belongs to technical field of medical equipment, is related to infant incubator security monitoring direction, and in particular to Yi Zhongying
Children's health care incubator real-time monitoring system.
Background technology
In recent years, medical institutions took place frequently infant incubator adverse events, temperature control, roasting injury youngster in such as use, very
To initiation serious medical accident.Incubator temperature control also turns into one of neonatal primary care injury.Therefore, to insulation
The security monitoring of box temperature degree is imperative.
Through practice, existing infant incubator temperature monitoring is primarily present some following shortcoming：1st, temperature acquisition number is lacked
According to verification, temperature sensor damage or data error it is larger when, do not compare confirmation system, be so easy to cause to control
System down accident, jeopardize the life security of baby.2nd, temperature observation circuit is simple, unreliable.Temperature observation circuit and baby
Other circuits of incubator use same power supply, and when incubator power supply breaks down, temperature observation circuit can not work, thus not
Temperature monitoring data can be provided and temperature anomaly is alarmed, temperature jump influence infantile health in incubator.3rd, most of hospitals, especially
It is more than three second larger hospital, there is multiple infant incubators in baby monitor room simultaneously, and the medical care people of ICU
The quantity of member protects the number than requiring far below national intensive care unit bed, so the continuous observation one by one of staff's needs,
Each infant incubator temperature monitoring data are recorded, consequently, it is possible to which all observational records of all infant incubators are once needed to consume
Take the long time, work is very heavy, even if can not so meet to monitor in real time each infant incubator data and
The requirement of infantile state in case, and father and mother can not understand the ambient conditions of baby in time.It is to sum up foregoing, conventional baby incubator
Independently monitoring, the interrupted complicated, hand-kept of the box temperature monitoring easily shortcomings such as error such as epidemic disaster be present in temperature monitoring, it is impossible to
Ensure the reliability and real-time of temperature monitoring data, so there is an urgent need to research and develop one independently of infant incubator control circuit
Neonate, premature's real-time central monitoring system.
The content of the invention
According to above the deficiencies in the prior art, the technical problems to be solved by the invention are to propose that a kind of infant incubator is real
When monitoring system, by setting multiple test points in incubator, data are carried out with the analysis of whole synthesis, and in the present invention
In order to reduce the stimulation to baby, single wireless prompt has been used, incubator has been solved and sends alarm and frighten asking for baby
Topic, wireless prompt have the advantages of display alarm points, carry with, and it is prominent that stand-by power supply reply is also provided with the present invention
Situation about so powering off, it also provided is the integrated type sensor after a kind of improvement and carry out data acquisition.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：A kind of infant incubator monitors in real time is
System, the real-time monitoring system include data acquisition module, data processing module, data memory module, data disaply moudle, electricity
Source module and wireless prompt, data acquisition module are used for detecting the humiture in incubator, data acquisition module connection data
Processing module, data processing module connection data memory module and data disaply moudle, power module connection data acquisition module,
Data processing module, data memory module and data disaply moudle, wireless prompt wireless connection data processing module, at data
Reason module signal an alert carries with wireless prompt to wireless prompt, baby monitor personnel.
In said system, the data acquisition module includes temperature and humidity collection unit and bed-wetting collecting unit, humiture are adopted
Collection unit includes multiple integrated type sensors, and integrated type sensor is arranged on each test point of incubator, humiture collection list
Member connection data processing module, bed-wetting collecting unit include the bed that multiple integrated type sensors are arranged on infant incubator
Under.The integrated type sensor includes semiconductor detection unit, two times transfer unit and signal processing unit, and semiconductor detection is single
Two semiconductor gauge R are provided with memberε1And Rε2It is r installed in radius0Circular film on, semiconductor gauge be pressurized occur
Change output resistance response, the output end connecting secondary converting unit of semiconductor detection unit, two times transfer unit is received and partly led
Electrical response signal is converted to pulse width signal by the output signal of body detection unit, two times transfer unit, two times transfer unit
Output end connects signal processing unit, the output signal of signal processing unit Decoupling Analysis two times transfer unit, signal transacting list
Member connection data processing module.In the semiconductor detection unit, a semiconductor gauge is arranged on home position, another
Semiconductor gauge is arranged on radius 0.89r0Concentric circles position on.The circular film is according in semiconductor detection unit
The strain variations of two semiconductor gauges be divided into normal strain section and negative strain section, with radius 0.63r0Concentric circles be
Boundary.Filament saturation water vapor partial pressure table is provided with the signal processing unit, signal processing unit calls corresponding using temperature value
Saturation vapour partial pressure value.The integrated type sensor is arranged in the cup-shaped support of cylinder, and circular film is arranged on cup branch
The upper surface of seat, circular film select brass diaphragm, aeroseal chamber are provided between cup-shaped support and brass diaphragm, two and half lead
Body strain piece is arranged on the surface of brass diaphragm.
The data processing module includes processing unit, AD conversion unit, data analysis unit and network interface, processing unit
Input connects data acquisition module, the output end connection AD conversion unit of processing unit, the connection data analysis of AD conversion unit
Unit, network interface connection pass through network interface wireless connection mobile phone in the output end of data processing module.The power module includes city
Electricity, stand-by power supply, safety circuit, electric power detection unit and automatic charging unit, stand-by power supply are energy-storage batteries, and safety circuit connects
Connect data processing module, the output end connection electric power detection unit and automatic charging unit of safety circuit, electric power detection unit and
Automatic charging unit connects stand-by power supply.The wireless prompt includes signal transfer unit, vibroseis, X button and display
Device, signal transfer unit wireless connection data processing module, the output end connection vibration source of signal transfer unit, X button connect
Connect control vibration source, display connection signal transfer unit.
Present invention has the advantages that:The present invention provides a kind of infant incubator real-time monitoring system, and the data in system are adopted
Collection module uses humiture integrated transducer, and reasonable installation everywhere, detects the temperature in incubator everywhere in time in incubator
Degree, unified temperature data processing is carried out after each comparison again, draws the degree of accuracy of sensor and the event of discovery sensor in time
Barrier, sensor break down or it is inaccurate when send alarm and reminding in time, remind staff to change.In the present invention also
There is provided standby collecting unit, system can also start standby adopt when judging that sensor breaks down while sending prompting
Collect unit and carry out data of the Temperature and Humidity module collection, do not influence the measurement of humiture real time data in incubator.Display module in system
It is display screen structure, but has located display real time humiture data on the display screen in the present invention, can also shows the song of humiture
Line oscillogram, care provider is very clear, and real-time detector data is stored in database, using communication unit according to guardian's
Instruction sends real time data to guardian.It is provided with wireless prompt in system, the place in wireless prompt wireless connection incubator
Module is managed, care provider carries with, and after the prompting message of data processing module is received, vibrating alert care provider is timely
Check.
Brief description of the drawings
The content expressed by this specification accompanying drawing and the mark in figure are briefly described below：
Fig. 1 is the operation principle block diagram of the infant incubator real-time monitoring system of the embodiment of the present invention.
Fig. 2 is the operation principle block diagram of the data processing module of the embodiment of the present invention.
Fig. 3 is the operation principle block diagram of the power module of the embodiment of the present invention.
Fig. 4 be the present invention embodiment sensor in foil gauge scheme of installation.
Fig. 5 is the structural representation of the sensor of the embodiment of the present invention.
Fig. 6 is the diagram of strains of the foil gauge of the embodiment of the present invention.
Fig. 7 is the sensor operating principles structured flowchart of the embodiment of the present invention.
Fig. 8 is the signal flow block diagram of the sensor of the embodiment of the present invention.
Fig. 9 is the pulse width signal change-over circuit figure of the embodiment of the present invention.
1 is cup-shaped support in figure, and 2 be aeroseal chamber, and 3 be circular film, and 4 be semiconductor gauge Rε1, 5 be semiconductor
Foil gauge Rε2。
Embodiment
Below against accompanying drawing, by the description to embodiment, for example involved each component of embodiment of the invention
Shape, construction, the mutual alignment and annexation between each several part, the effect of each several part and operation principle, manufacturing process and
Operate with method etc., is described in further detail, to help those skilled in the art to inventive concept of the invention, technology
Scheme has more complete, accurate and deep understanding.
A kind of infant incubator real-time monitoring system, the real-time monitoring system include data acquisition module, data processing
Module, data memory module, data disaply moudle, power module and wireless prompt, data acquisition module are used for detecting insulation
Humiture in case, data acquisition module connection data processing module, data processing module connection data memory module and data
Display module, power module connection data acquisition module, data processing module, data memory module and data disaply moudle, nothing
Line reminiscences wireless connection data processing module, data processing module signal an alert to wireless prompt, baby monitor people
Member carries with wireless prompt.
In said system, the data acquisition module includes temperature and humidity collection unit and bed-wetting collecting unit, humiture are adopted
Collection unit includes multiple integrated type sensors, and integrated type sensor is arranged on each test point of incubator, humiture collection list
Member connection data processing module, bed-wetting collecting unit include the bed that multiple integrated type sensors are arranged on infant incubator
Under.The integrated type sensor includes semiconductor detection unit, two times transfer unit and signal processing unit, and semiconductor detection is single
Two semiconductor gauge R are provided with memberε1And Rε2It is r installed in radius0Circular film on, semiconductor gauge be pressurized occur
Change output resistance response, the output end connecting secondary converting unit of semiconductor detection unit, two times transfer unit is received and partly led
Electrical response signal is converted to pulse width signal by the output signal of body detection unit, two times transfer unit, two times transfer unit
Output end connects signal processing unit, the output signal of signal processing unit Decoupling Analysis two times transfer unit, signal transacting list
Member connection data processing module.In the semiconductor detection unit, a semiconductor gauge is arranged on home position, another
Semiconductor gauge is arranged on radius 0.89r0Concentric circles position on.The circular film is according in semiconductor detection unit
The strain variations of two semiconductor gauges be divided into normal strain section and negative strain section, with radius 0.63r0Concentric circles be
Boundary.Filament saturation water vapor partial pressure table is provided with the signal processing unit, signal processing unit calls corresponding using temperature value
Saturation vapour partial pressure value.The integrated type sensor is arranged in the cup-shaped support of cylinder, and circular film is arranged on cup branch
The upper surface of seat, circular film select brass diaphragm, aeroseal chamber are provided between cup-shaped support and brass diaphragm, two and half lead
Body strain piece is arranged on the surface of brass diaphragm.
The data processing module includes processing unit, AD conversion unit, data analysis unit and network interface, processing unit
Input connects data acquisition module, the output end connection AD conversion unit of processing unit, the connection data analysis of AD conversion unit
Unit, network interface connection pass through network interface wireless connection mobile phone in the output end of data processing module.The power module includes city
Electricity, stand-by power supply, safety circuit, electric power detection unit and automatic charging unit, stand-by power supply are energy-storage batteries, and safety circuit connects
Connect data processing module, the output end connection electric power detection unit and automatic charging unit of safety circuit, electric power detection unit and
Automatic charging unit connects stand-by power supply.The wireless prompt includes signal transfer unit, vibroseis, X button and display
Device, signal transfer unit wireless connection data processing module, the output end connection vibration source of signal transfer unit, X button connect
Connect control vibration source, display connection signal transfer unit.
Deposited as shown in figure 1, infant incubator real-time monitoring system includes data acquisition module, data processing module, data
Module, data disaply moudle, power module and wireless prompt are stored up, except wireless prompt is all arranged in real-time monitoring system
On the incubator of baby, wireless prompt needs care provider to carry with, and data acquisition module is arranged on infant incubator,
For the data of the Temperature and Humidity module of each test point in detection incubator in real time, data acquisition module connection data processing module will
The data detected are sent to data processing module, data processing module connection data memory module and data disaply moudle, will
The data of reception and the data trend figure of output are all saved in data memory module, and data trend figure all shows mould by data
The display screen of block is shown, power module connection monitoring system, is provided electric energy for monitoring system and is supported.In data processing module
It can judge that the detection data in incubator whether in the threshold range of setting, illustrate no longer if humiture is too high or too low
In the range of, signal an alert to wireless prompt, wireless prompt sends vibrating alert care provider and checked in time accordingly
Infant incubator simultaneously actively closes reminiscences after vibrating alert is heard, reduces the stimulation to baby's stable environment.
Data acquisition module is arranged in each infant incubator, and data markers unit is provided with data acquisition module, number
Data processing module is connected according to indexing unit, data markers element memory contains the number position information of each infant incubator,
The marking signal of gathered data and data indexing unit in data acquisition module is sent collectively to data processing module, so as to side
Just data processing module judges to distinguish data source, and when alarm signal is received, conveniently sends label information, from
And care provider can get information about alarm position, it is not necessary to lookup one by one.
Data acquisition module, which includes temperature and humidity collection unit and bed-wetting collecting unit, temperature and humidity collection unit, to be included multiple
Integrated type sensor, installed in each test point of incubator, the real-time humiture for detecting each point in incubator, humiture collection
Unit connects data processing module, and the humiture in the incubator collected is sent into data processing module, data processing mould
Optimal Threshold of Temperature And Humidity is provided with block, the temperature in incubator is judged for moment contrast, and detecting the abnormal warm and humid number of degrees
During value, abnormality detection data are higher or lower than threshold value, and data processing module, which can all mark, sends alarm and reminding signal to wirelessly
Reminiscences.Data processing module can also judge whether sensor breaks down, because the data of temperature and humidity collection unit can all be sent out
Data processing module is sent to, data processing module can draw humiture tendency chart according to the data of the Temperature and Humidity module received.
Data exception unit, data exception unit connection data processing module, to each biography are provided with data processing module
The abnormal data of sensor carries out data statistics, and each sensor is both provided with the test position that label is used for distinguishing sensor, number
The frequency of abnormity of each sensor is counted according to the division of the label of sensor according to anomaly unit, comes to check in care provider simultaneously real
After the humiture of border detection abnormality alarm point, the input validation result on data disaply moudle.If temperature and humidity collection unit
Real time data and care provider check inconsistent that care provider can pass through the enter key input validation on data disaply moudle
As a result, negate the testing result of temperature and humidity collection unit, data processing module sends the prompting of abnormality alarm point sensor failure, and
The sensor of Shi Genghuan abnormality alarms point.If data exception unit is substantially big in the frequency of abnormity for counting same sensor
In the abnormal quantity of other sensors, data exception unit, which confirms that sensor breaks down, to be needed to overhaul, and is sent maintenance prompting and is arrived
Data processing module, data processing module send maintenance reminder alarm to wireless prompt.When sensor occurs, insulation
Humiture in case needs to continue to detect, and can not interrupt, influence the data monitoring in incubator, so being adopted in the present invention in data
Standby collecting unit is provided with collection module, standby collecting unit is again connected on data processing module, standby collecting unit
It is identical with data acquisition unit, but standby collecting unit is controlled by data processing module, in data processing module
While sending sensor maintenance alarm, the sensor at the out-of-the way position in standby collecting unit, standby collecting unit are opened
In sensor be to separate work, i.e., data processing module only needs to open the sensor instead of trouble point, and standby collection is single
Number of sensors, installation site and temperature and humidity collection unit in member it is identical.
The integrated type sensor for measurement temperature humidity is provided with bed-wetting collecting unit in data acquisition module, is integrated
Formula sensor is arranged on the lower section of baby' diaper, detects the dampness of baby' diaper in real time, directly can also be passed from humidity
Sensor is arranged on the lower section of baby' diaper, can realize the purpose that detection baby wets the bed.Bed-wetting collecting unit is connected to data
In processing module, the moisture signal for conveying detection is sent to data processing module, by the wet diaper set in data processing module
Spend threshold value and carry out data comparison, bed-wetting alarm and reminding is sent to wireless reminding when detected value is more than diaper humidity threshold
Device.Care provider carries with wireless prompt, and wireless prompt is checked in time when wireless prompt shakes, and closes carry in time
Wake up device, avoid continuous vibration, reduce the environmental stimuli to infant, the alarm signal in the present invention will not ring on incubator
Rise, reduce the stimulation to infant as far as possible, the alarm signal in the present invention is to send vibrations, wireless prompt by wireless prompt
By control, personnel carry with.
Signal transfer unit, vibroseis, X button and display are provided with wireless prompt, signal transfer unit is wireless
Data processing module is connected, the alarm signal of data processing module is received, the output end connection vibration source of signal transfer unit, closes
The closing of button connects control vibration source is closed, display connection signal transfer unit, is received in signal transfer unit at data
After the warning information for managing module, vibration source starts to shake, and display shows alarm signal and alarm position, and control personnel can
To close the vibration of vibration source by X button, nursing unit is gone to check that closing vibration alarm in time reminds in time, substitution tradition
Audible and visible alarm, reduce the stimulation and influence of noise to baby.
Infant incubator is divided into closed and not closed situation, is designed with ventilating opening in incubator, but ventilating opening is not yet
Can ensure that it is normally to divulge information always, so the present invention is provided with air pressure detecting unit in data acquisition module, air pressure detection is single
Member is used for detecting the air pressure size in incubator, is connected on data processing module, for determining the air circulation in incubator,
Become a useful person development beneficial to baby.If it is also feasible to be not provided with independent air pressure detecting unit, the integrated form used in the present invention passes
Sensor has carried out structure improvement, can also detect atmospheric pressure value while detection temperature, humidity.
As shown in Fig. 2 processing unit, AD conversion unit, data analysis unit, interface and net are provided with data processing module
Mouthful, after the gathered data of data acquisition module carries out preliminary treatment by processing unit, data point are sent to by AD conversion unit
The threshold value multilevel iudge that unit carries out data of the Temperature and Humidity module gathered data is analysed, alarm is sent in time if being higher or lower than secure threshold
Signal judges whether sensor is normal to wireless prompt, while by each data of data exception unit statistics sensor.
Extensive interface and network interface are connected in the output end of data processing module, Function Extension can be carried out and networking is set, passed through
The communication unit that network interface connection is set, communication unit are connected between data processing module and baby father and mother's mobile phone.Because baby
Incubator is in sterile room, and hospital manages for convenience and the consideration of various aspects, and the visiting hours of father and mother are very of short duration, father and mother
Lack the understanding to baby's environment.It is used for connecting baby father and mother's mobile phone so being additionally arranged communication unit in the present invention, constructs one
Signal communication circuit, when father and mother want to know about the information of baby's local environment, request signal can be sent to communication unit, communication
Unit sends request signal and sends real-time data acquisition information to father and mother's mobile phone to data processing module, data processing module.
If father and mother want to check baby at any time, a camera, capture pictures can also be installed on incubator, but camera is not
Flash light compensation function can be set, prevent light change from stimulating baby, influence infant development, the photo of candid photograph is saved in data storage
In module, it is sent to according to request signal in a manner of multimedia message in father and mother's mobile phone.Data exception unit is connected to data analysis unit,
Anomaly statistics directly are carried out to data.
The output of data processing module is connected with data memory module, data disaply moudle and power module, data storage
Module is used for the real-time detector data of data storage acquisition module, and data processing module is according to the historical data of data memory module
Humiture changing trend diagram is drawn, is shown on data disaply moudle, instead of traditional is only the disadvantage for showing real time humiture
End, control personnel can set humiture to see abnormity point at any time in time according to tendency chart, temperature in incubator and wet
Degree be all manually entered setting, so needed in data disaply moudle set input keyboard, by input keyboard input instruction,
Threshold value or various setting values.
The heating of incubator, temperature are kept, system detectio work is required for power supply to support, usual incubator monitors in real time is
System connection civil power, however, to ensure that in the case of unexpected power-off incubator can normal work, be additionally arranged in the present invention standby
Ensure the continuous firing of incubator with power supply.Power module connection system is system power supply, as shown in figure 3, power module bag
Include civil power, but power module also includes stand-by power supply and safety circuit, stand-by power supply is energy-storage battery, store electric energy in advance in case
Whether the possible period of want or need, safety circuit connection data processing module, work for real-time detector data processing module, if detected
Data processing module power-off is stopped, then opens stand-by power supply at once, ensures the normal work of incubator within a certain period of time,
Routine testing, heating, alarm including incubator, the work of simulation system, the mutation for reducing environment cause the panic thing of baby
Therefore.Electric power detection unit and automatic charging unit are also provided with power module, electric power detection unit and automatic charging unit connect
Connecing and be controlled by safety circuit, electric power detection unit is connected on stand-by power supply, for detecting the electricity of stand-by power supply, monitoring in real time
The state of charge of stand-by power supply, electric power detection unit and stand-by power supply work together, at the beginning of stand-by power supply, electricity inspection
Survey unit and just initially enter working condition, electric power detection unit detects the real-time electric quantity state of stand-by power supply, and city power recovery is standby
Power supply is stopped, and now, automatic charging unit is started working, and is charged for stand-by power supply, electricity is detected in electric power detection unit
When amount is full of, stand-by power supply is closed, stand-by power supply is stood by.
In addition, in order to increase the accuracy of data acquisition in the present invention, there is provided the sensor after a kind of improvement, the present invention
The integrated type sensor of offer is used for detection temperature and humidity data, and the sensor utilizes steam partial pressure and sensitivity in air
The difference of the difference of resistance, i.e., the pulsewidth after quadratic transformation and its counting to frequency all the time, it is directly proportional.And atmospheric temperature is then
Counting sum with sensing element is in monodrome respective function relation.There is abundant and necessary resolution in the range of conversion range
Power.Traditional dew cell time lag during the absorption and parsing to steam is longer, therefore dynamic characteristic is bad, and in the present apparatus
Flexible member and foil gauge then input signal is responded it is very fast.
First, atmospheric condition parameter
Dalton's law points out that the gross pressure of hybrid atmospheric is equal to the partial pressure sum of each composition gas, such as formula (1) institute
Show：
PM=Pd+PW(Pa) (1)
P in formulaM(Pa) it is the gross pressure of mixed gas, Pd(Pa) it is the partial pressure of dry atmosphere, PW(Pa) it is institute in air
Containing water vapor partial pressure, wherein PWIn PMAccount for lion's share, only 5% or so, therefore PMAnd PdPressure relatively normal atmosphere
Pressure.
Relative humidityFormula be：
In formulaRepresent relative humidity, PWSFor atmospheric pressure at a certain temperature, saturation vapour partial pressure (Pa), it is with temperature
And become, it can be tabled look-up by known temperature or be tried to achieve by regression fit curvilinear equation.It can be obtained by formula (1), if can be surveyed by instrument
Go out differential pressure PM–Pd, you can calculate PW, then with measured temperature, looked in density of moist air, water vapour pressure, the water capacity table of comparisons
To PWS, relative humidity can be calculated by formula (2)
2nd, foil gauge and its transfer characteristic
In sensor foil gauge scheme of installation as shown in figure 4, sensor structural representation as shown in figure 5, strain
The transfer characteristic and Strain Distribution of piece are as shown in Figure 6.Integrated type sensor is integrally a cylindrical shape shell, and shell includes cup
Shape bearing 1 and brass diaphragm 3, brass diaphragm 3 are covered in cup-shaped support 1, therebetween one aeroseal chamber 3 of formation, and two
Individual semiconductor gauge is arranged on brass diaphragm 3, and the resistance variations by measuring semiconductor gauge calculate integrated form biography
Temperature, relative humidity and atmospheric pressure data in sensor (abbreviation integrated sensor) installation environment.Analysis calculates temperature, relatively wet
Two times transfer unit, signal processing unit needed for degree and atmospheric pressure may be mounted on 3 on brass diaphragm, can also be arranged on
The side of cup-shaped support, signal is transmitted by connection.
Hybrid atmospheric presses PMStepless action is in the outer surface of flexible sheet, the then differential pressure of diaphragm both sides：
Δ P=PM–Pre=PW+Pd-Pre(Pa) (3)
P in formulare=4104(Pa) it is the reference pressure set in annular seal space, Pd=101325 (Pa) are normal atmosphere
Pressure, so as to calculate air reclaimed water partial pressure of vapor PW(Pa)
Under differential pressure Δ P effects, the distribution of membrane surface upper stress and strain is shown below：
Radial stress：
Radial strain：
More preferable from brass membrane flexive in the present invention in formula, E (Pa) is membrane flexive modulus, about 7*1010Pa, μ are about
It is Poisson's ratio for 0.33, r0For the outer radius 40 (mm) of circular film 3, h is the diaphragm thickness 0.1 (mm) of circular film 3, and b is
The thickness 5 (mm) of cup-shaped support, the height 10 (mm) of cup-shaped support, Δ P act on the differential pressure (Pa) of diaphragm both sides, and r (mm) is
The radius of point of observation.
If known constant is substituted into (4) formula, circumferential stress σ can be obtainedR=0=8*104*ΔP(Pa) (6)
The sensitivity coefficient K of foil gaugeεWith transfer characteristic such as formula (7) Suo Shi：
R in formula0For t=0 DEG C and εrSheet resistance (Ω), K are strained when=0εAbout 125, Δ RεThen for foil gauge in εrExcitation
The variable quantity (Ω) of lower resistance, (6) formula substitution (7) can be obtained：
If by E=7*1010Pa substitutes into formula and understood, the relative resistance change that foil gauge can be output, under maximum range
Only 10-2Magnitude, therefore quadratic transformation and signal processing circuit need to be added in a device, to obtain required sensitivity and resolution
Power.
3rd, quadratic transformation and signal transmission flow
Operation principle structured flowchart as shown in fig. 7, integrated sensor include semiconductor detection unit, two times transfer unit,
Signal processing unit, two semiconductor gauges is provided with semiconductor detection unit, semiconductor gauge is become by piezoresistance
Change output resistance response, the output end connecting secondary converting unit of semiconductor detection unit, two times transfer unit receives semiconductor
Electrical response signal is converted to pulse width signal by the output signal of detection unit, two times transfer unit, two times transfer unit it is defeated
Go out end connection signal processing unit, the output signal of signal processing unit Decoupling Analysis two times transfer unit, signal processing unit
Connect data processing module, the temperature of the mount point that data processing module receipt signal processing unit calculates, relative humidity and
Atmospheric pressure.
Signal flow block diagram is as shown in figure 8, two times transfer unit includes two identical pulse signal change-over circuits, pulse
Signaling conversion circuit is made up of 555 timer C1 and C2, and two times transfer unit and signal processing unit are additionally provided with gating switch, choosing
Switched with C3, signal processing unit is mainly formed as C4 single-chip microcomputers.R in Fig. 8ε1And Rε2In PWUnder being encouraged with t, each produce different
R1And R2Response, they each produce τ after C1, C2 chip 555 of two identical pulse signal change-over circuits converts1With
τ2(S) pulsewidth exports, and the pulse width signal delivers to C4 single-chip microcomputers and carries out signal transacting again after C3 switching gates.Pulse signal is changed
For circuit as shown in figure 9, resistance R is connected between No. 2 pins of C timers 555 and No. 3 pins, electric capacity C is connected to 555 timings
On No. 2 pins of device, No. 2 pins and No. 6 pin short circuits, No. 3 pins and No. 7 pin short circuits, No. 7 pins of 555 timers are defeated
Go out pulse width signal and be connected to signal processing unit.Due to the difference of foil gauge, resistance and output pulse width in two impulse circuits
R can be used1And R2、τ1And τ2Represent.
Pulse width conversion formula：τ=ln2CR (S) corresponds to two pulse signal change-over circuits：
τ1=ln2C0·R1(S) (9)
τ2=ln2C0·R2(S) (10)
τ in formula1And τ2For two-way pulsewidth output signal, R corresponding to two semiconductor gauges1And R2For semiconductor strain
The increased resistance value measurement unit of piece is Ω, C0(F) it is mica standard electric capacity, about 0.72 × 10-6F, above formula show that pulsewidth is defeated
Go out and respective institute connecting resistance R1And R2It is directly proportional.
4th, in multifactor input, the decoupling processing of response is synthesized
In τ1And τ2In be implied with water vapor partial pressure PWWith two kinds of information of temperature t, it how is allowed in follow-up Data processing
Separation, it need to realize information separation by data decoupler technology and restore.
R1And R2Resistance variations formula is：
R in formula0Resistance on the basis of=1000 Ω；B=4850 (K) is the resistance temperature coefficient of semiconductor gauge；T0=273 (K)
For reference temperature(TR)；T (K) is input temp；ΔRε1With Δ Rε2Respectively R1And R2It is each caused electric under atmospheric pressure excitation
Hinder increment.Two formulas more than, if allowing Δ Rε1With Δ Rε2Numerical value is identical, but positive and negative on the contrary, i.e. (11) and (12) formula is variable
Into：
Two formulas are subtracted each other or are added by more than, so that it may isolate PWWith two kinds of input information of t, that is, R1+R2=f when being addedt(T),
With R1-R2=f when subtracting each otherε(PW), i.e., and with the result of difference only corresponded with single input information, Δ Rε1=-Δ Rε2=Δ
Rε。
Referring to Fig. 5, whole diaphragm outer surface is under differential pressure Δ P effects, with radius r=0.63r0For boundary, divide into positive and negative
Two strain regions.By center of circle part inner circle Wei Zheng ε areas, and periphery excircle part then Wei Fu ε areas are leaned on, in the suitable of this two regions
On position, it can find that ε numerical value is equal but opposite polarity two points, one is in circle centre position, r1=0, and another point passes through (5) formula
It is calculated as r2=0.89r0Place.Two piece performance identical semiconductor gauges are configured on this 2 points, and are allowed on its center and diaphragm
Reference point overlaps, and is then achieved that the quantitative relationship of (13) and (14) formula.
(14) formula is added to obtain (13) formula
ε information has been eliminated in above formula to (R1+R2) quantitative interference, but R1And R2It is respectively coupled to 555 chips
In charge-discharge circuit, therefore can not be by R1And R2Directly it is added, now need to just passes through data operation and handle to realize.If allow pulsewidth
τ1And τ2To clock frequency f in single-chip microcomputer0Count, then have count value N1And N2For：
N1=τ1·f0 (16)
N2=τ2·f0 (17)
τ1+τ2=(N1+N2)/f0(S) (18)
Simultaneous above formula, and can be obtained by arrangement：
Celsius temperature：T=T-273 (DEG C) (20)
Each constant coefficient is in R in formula0=1000 Ω, C0=7.2*10-6F and f0Calculated under the conditions of=10MHZ.From R1With
R2Two times transfer information in isolate strain and steam partial pressure PWEtc. information, (13) formula is subtracted into (14) formula, can be obtained
R1-R2=2 Δs Rε=2R0Kε·ε(Ω) (21)
Recycle τ1-τ2=(N1-N2)/f0(5), the simultaneous such as (9), (10) formula, it is collated to obtain,
Δ P=10 (N1-N2)(Pa) (22)
Formula (19) and (22) are two kinds of input-output characteristic equations of sensor, have enough sensitivity and divide
Distinguish power.It is knownP in formulaWSCan by temperature t through tabling look-up or following regression equations calculate,
PWS=aEXP (bt) (Pa) (23)
A is 6.16 (Pa) in formula, and b is that 0.064 (1/ DEG C) is fitting constant, then
PWS=6.16EXP (0.064t) (Pa) (24)
Atmospheric pressure is not a definite value, is had differences with the difference of landing pit height above sea level, while also with season temperature
Degree changes and slight change, to PWCalculating can be described approx with following formula：
PW=Δ P+Pre-Bf(T)+h·8.76(Pa) (25)
H is local height above sea level (m) in formula, and coefficient 8.76 (Pa/m) is atmospheric pressure attenuation slope, and f (T) is temperature adjustmemt
Coefficient can pass through the matched curve of measured data of experiment and be estimated.Due to being in coastal area winter summer air pressure change ratio
1.02, and be only 1.0026 in Qinghai Area winter Charpy.Decline with temperature and be increased slightly.Therefore the small shadow of temperature ought not be considered
Ring, and at coastal area, (25) formula can be reduced to：
PW=Δ P+ (Pre- B)=10 (N1-N2)+(Pre-B)(Pa) (26)
One of theoretical foundation of this paper resolvings is that standard atmospheric pressure is constant, and actual atmospheric pressure is with local height above sea level
Degree and becomes, when device territory of use height above sea level and it is larger with reference to difference in height when, P in formula (3)dSchool should be given by software
Just, to maintain the data conversion precision of water vapor partial pressure power.So the present invention is provided with GPS unit and air in signal processing unit
Numerical tabular is pressed, GPS unit is connected to the longitude and latitude for being used for alignment sensor mount point on signal processing unit, inquires about mount point
Atmospheric pressure numerical value is the partial pressure of the dry air intracavitary in sensor, and the air reclaimed water that binding signal processing unit calculates is steamed
Qi leel pressure value, and then utilize formula (1)：PM=Pd+PW(Pa) pressure of the pressure value of hybrid atmospheric, i.e. mount point is calculated
Value.
So far, the numerical value of temperature, relative humidity and atmospheric pressure, which can calculate to solve, comes.Integrated form provided by the invention passes
Sensor has simple in construction, easy to implement.Obtained in the present invention through analytic method：In air steam partial pressure and sensitive resistance it
The difference of difference, i.e., the pulsewidth after quadratic transformation and its counting to frequency all the time, it is directly proportional, and atmospheric temperature then with sensitivity
The logarithm of the counting sum of element is inversely.The theoretical foundation of this paper resolvings is that physical atmosphere is constant, actual
Atmospheric pressure become with local height above sea level, when device territory of use height above sea level with it is larger with reference to difference in height when, should pass through
Software is corrected, to maintain the data conversion precision of water vapor partial pressure power.
The present invention is exemplarily described above in conjunction with accompanying drawing, it is clear that present invention specific implementation is not by aforesaid way
Limitation, as long as the improvement of the various unsubstantialities of inventive concept and technical scheme of the present invention progress is employed, or without changing
Enter and the design of the present invention and technical scheme are directly applied into other occasions, within protection scope of the present invention.This hair
Bright protection domain should be determined by the scope of protection defined in the claims.
Claims (7)
- A kind of 1. infant incubator real-time monitoring system, it is characterised in that the real-time monitoring system include data acquisition module, Data processing module, data memory module, data disaply moudle, power module and wireless prompt, data acquisition module are used for Detect the humiture in incubator, data acquisition module connection data processing module, data processing module connection data storage mould Block and data disaply moudle, power module connection data acquisition module, data processing module, data memory module and data are shown Module, wireless prompt wireless connection data processing module, data processing module signal an alert to wireless prompt, baby Care provider carries with wireless prompt；The data acquisition module includes temperature and humidity collection unit and bed-wetting collecting unit, Temperature and humidity collection unit includes multiple integrated type sensors, and integrated type sensor is arranged on each test point of incubator, warm and humid Collecting unit connection data processing module is spent, bed-wetting collecting unit includes multiple integrated type sensors and is arranged on infant incubator Bed under；The integrated type sensor includes semiconductor detection unit, and being provided with two semiconductors in semiconductor detection unit should Become piece（4）With（5）It is installed in radiusCircular film on；In semiconductor detection unit, a semiconductor gauge Installed in home position, another semiconductor gauge is arranged on radius 0.89Concentric circles position on；Circular film root Strain variation according to two semiconductor gauges in semiconductor detection unit is divided into normal strain section and negative strain section, with half Footpath 0.63Concentric circles be boundary.
- 2. infant incubator real-time monitoring system according to claim 1, it is characterised in that the integrated type sensor bag Semiconductor detection unit, two times transfer unit and signal processing unit are included, being provided with two semiconductors in semiconductor detection unit should Become piece（4）With（5）It is installed in radiusCircular film on, semiconductor gauge is pressurized and changed output resistance Response, the output end connecting secondary converting unit of semiconductor detection unit, two times transfer unit receive semiconductor detection unit Electrical response signal is converted to pulse width signal, the output end connection letter of two times transfer unit by output signal, two times transfer unit Number processing unit, the output signal of signal processing unit Decoupling Analysis two times transfer unit, at signal processing unit connection data Manage module.
- 3. infant incubator real-time monitoring system according to claim 2, it is characterised in that in the signal processing unit Provided with filament saturation water vapor partial pressure table, signal processing unit calls corresponding saturation vapour partial pressure value using temperature value.
- 4. infant incubator real-time monitoring system according to claim 2, it is characterised in that the integrated type sensor is set Put the cup-shaped support in cylinder（1）On, circular film（3）It is arranged on cup-shaped support（1）Upper surface, circular film（3）Choosing With brass diaphragm, cup-shaped support（1）Aeroseal chamber is provided between brass diaphragm（2）, two semiconductor gauges（4 and 5） Installed in the surface of brass diaphragm.
- 5. infant incubator real-time monitoring system according to claim 1, it is characterised in that the data processing module bag Include processing unit, AD conversion unit, data analysis unit and network interface, the input connection data acquisition module of processing unit, place The output end connection AD conversion unit of unit is managed, AD conversion unit connection data analysis unit, network interface connection is in data processing mould In the output end of block, pass through network interface wireless connection mobile phone.
- 6. infant incubator real-time monitoring system according to claim 1, it is characterised in that the power module includes city Electricity, stand-by power supply, safety circuit, electric power detection unit and automatic charging unit, stand-by power supply are energy-storage batteries, and safety circuit connects Connect data processing module, the output end connection electric power detection unit and automatic charging unit of safety circuit, electric power detection unit and Automatic charging unit connects stand-by power supply.
- 7. infant incubator real-time monitoring system according to claim 1, it is characterised in that the wireless prompt includes Signal transfer unit, vibroseis, X button and display, signal transfer unit wireless connection data processing module, signal pass Pass the output end connection vibration source of unit, X button connection control vibration source, display connection signal transfer unit.
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| CN110960750A (en) * | 2019-11-11 | 2020-04-07 | 云南大学 | Intelligent Internet of things monitoring system and method for intravenous drip |
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