CN105784138B - The contactless online thermometry of one kind and system - Google Patents
The contactless online thermometry of one kind and system Download PDFInfo
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- CN105784138B CN105784138B CN201610301754.XA CN201610301754A CN105784138B CN 105784138 B CN105784138 B CN 105784138B CN 201610301754 A CN201610301754 A CN 201610301754A CN 105784138 B CN105784138 B CN 105784138B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/024—Means for indicating or recording specially adapted for thermometers for remote indication
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/028—Means for indicating or recording specially adapted for thermometers arrangements for numerical indication
Abstract
The invention discloses a kind of contactless online thermometry and systems.Steps are as follows for this method：The temperature for the Heat Conduction Differential Equations established according to heat transfer theory is resolved module to be arranged in data processing unit；Data processing unit is attached with temperature collecting device and host computer respectively；It waits after the completion of connecting, data processing unit receives the ambient temperature data around the collected measurand of temperature collecting device；Temperature in data processing unit resolves module and is changed with time course according to the temperature of the ambient temperature data real-time resolving measurand around the measurand of sampling；Host computer is changed with time course by receiving the temperature that transmit from data processing unit, is stored, is shown to the temperature of measurand, analyze and monitored.The present invention resolves the temperature of module real-time resolving measurand using the temperature based on Heat Conduction Differential Equations by acquiring the ambient temperature data around measurand, and the temperature detection of the measurand of its internal temperature is directly measured suitable for inconvenience.
Description
Technical field
The present invention relates to survey control technology field, especially a kind of contactless online thermometry and system.
Background technology
In the production in the fields such as mechanical industry, chemical industry, national defense industry and management process, it is often necessary to be given birth to processing
The internal temperature field of the product of production or the article of storage management is monitored in real time, to exclude security risk, promotes safety in production
And safety management, reduce the unnecessary person and economic loss.For example, monitoring acid, alkali, salt, oil plant and Hazardous Chemical Substances storage
Real time temperature in tank (tower, cylinder) is with (point) source that eliminates danger；The temperature of cereal keeps its unlikely germination rotten in monitoring warehouse；Prison
The internal temperature variation of the solid fuels such as control propellant makes its unlikely generation spontaneous combustion etc..One common feature of this kind of thermometric problem
Acquisition can not directly be measured by being the internal temperature of measurand.
Traditional method has thermocouple temperature measurement, infrared measurement of temperature, spectroscopic temperature measurement etc., these method some need trepannings measure,
Some is only capable of measurement surface temperature, will be in direct contact measurand, and manual record data are not only time-consuming but also may omit weight
Data are wanted, round-the-clock automatic detection is also cannot achieve.
Invention content
The purpose of the present invention is to provide a kind of contactless online thermometry and systems, by acquiring tested pair
As the ambient temperature data of surrounding, the temperature detection of the inconvenient measurand for directly measuring internal temperature is realized.
Realize that the technical solution of the object of the invention is：A kind of contactless online thermometry, including it is following
Step：
Step 1, temperature is set in data processing unit and resolves module, it includes according to heat transfer theory which, which resolves module,
The Heat Conduction Differential Equations of foundation；
Step 2, data processing unit is attached with temperature collecting device and host computer respectively；
Step 3, it waits after the completion of connecting, data processing unit receives around the collected measurand of temperature collecting device
Ambient temperature data；
Step 4, the temperature in data processing unit resolves module according to the environment temperature number around the measurand of sampling
It changes with time course according to the temperature of real-time resolving measurand；
Step 5, host computer is changed with time course by receiving the temperature that transmit from data processing unit, to being tested pair
The temperature of elephant is stored, is shown, being analyzed and monitoring.
Further, it is as follows to obtain difference equation after discretization for Heat Conduction Differential Equations described in step 1：
aPTP=aETE+aWTW+aNTN+aSTS+aFTF+aBTB+b
Wherein,
aE=DeA(|Pe|)+max(-Fe, 0), aW=DwA(|Pw|)+max(Fw,0)
aN=DnA(|Pn|)+max(-Fn, 0), aS=DsA(|Ps|)+max(Fs,0)
aF=DfA(|Pf|)+max(-Ff, 0), aB=DbA(|Pb|)+max (Fb,0)
In formula, TP、TE、TW、TN、TS、TF、TBRespectively represent the temperature at unit P, E, W, N, S, F, B, aP、aE、aW、aN、
aS、aF、aBRespectively represent the thermal conductivity at unit P, E, W, N, S, F, B, De、Dw、Dn、Ds、Df、DbRepresentative unit E, W, N, S, F, B circle
Expansion at face is led, Fe、Fw、Fn、Fs、Ff、FbThe hot-fluid of the interfaces representative unit E, W, N, S, F, B, Pe、Pw、Pn、Ps、Pf、PbIt represents
The Peclet numbers of the interfaces unit E, W, N, S, F, B, A (| P |)=max (0, (and 1-0.1 | P |)5),Respectively represent one
When layer unit P at thermal conductivity and temperature, SC、SPIt is respectively constant and temperature derivative, ρ, c, Δ V difference in linear heat source function
Density, thermal capacitance, the volume of representative unit P, Δ t represent time step.
Further, data processing unit is attached with temperature collecting device and host computer respectively described in step 2,
The state self-checking command of middle host computer triggering temperature collecting device, detects the working condition of temperature collecting device.
A kind of contactless online temperature measurement system, including：
Temperature collecting device, for acquiring the ambient temperature data around measurand；
Data processing unit inside sets temperature and resolves module, solved in real time according to the collected temperature data of temperature collecting device
The temperature for calculating measurand changes with time course；
Host computer changes with time course for receiving the temperature transmitted from data processing unit, to measurand
Temperature is stored, is shown, being analyzed and monitoring.
Further, the temperature set in the data processing unit resolves module, includes being led according to what heat transfer theory was established
The hot differential equation, it is as follows using difference equation is obtained after differential equation discretization：
aPTP=aETE+aWTW+aNTN+aSTS+aFTF+aBTB+b
Wherein,
aE=DeA(|Pe|)+max(-Fe, 0), aW=DwA(|Pw|)+max(Fw,0)
aN=DnA(|Pn|)+max(-Fn, 0), aS=DsA(|Ps|)+max(Fs,0)
aF=DfA(|Pf|)+max(-Ff, 0), aB=DbA(|Pb|)+max(Fb,0)
In formula, TP、TE、TW、TN、TS、TF、TBRespectively represent the temperature at unit P, E, W, N, S, F, B, aP、aE、aW、aN、
aS、aF、aBRespectively represent the thermal conductivity at unit P, E, W, N, S, F, B, De、Dw、Dn、Ds、Df、DbRepresentative unit E, W, N, S, F, B circle
Expansion at face is led, Fe、Fw、Fn、Fs、Ff、FbThe hot-fluid of the interfaces representative unit E, W, N, S, F, B, Pe、Pw、Pn、Ps、Pf、PbIt represents
The Peclet numbers of the interfaces unit E, W, N, S, F, B, A (| P |)=max (0, (and 1-0.1 | P |)5),Respectively represent one
When layer unit P at thermal conductivity and temperature, SC、SPIt is respectively constant and temperature derivative, ρ, c, Δ V difference in linear heat source function
Density, thermal capacitance, the volume of representative unit P, Δ t represent time step.
Compared with prior art, the present invention its remarkable advantage is：(1) a kind of inconvenient directly measurement measurand is solved
The temperature of inflammable and explosive substances in the thermometric problem of internal temperature, such as monitoring Hazardous Chemical Substances storage tank；(2) according to heat transfer scientific principle
By the change procedure for obtaining temperature with environment temperature by solving heat transfer differential equation recycles data processing and computer logical
Letter technology realizes the storage and monitoring of temperature data；(3) non-cpntact measurement is realized, computer real-time recorded data efficiently may be used
Round-the-clock automatic detection is carried out by ground.
Description of the drawings
Fig. 1 is the flow chart according to the contactless online thermometry of the present invention.
Fig. 2 is the structure chart according to the contactless online temperature measurement system of the present invention.
Specific implementation mode
Further description is made to the present invention below in conjunction with the accompanying drawings.
In conjunction with Fig. 1, the contactless online thermometry of the present invention includes the following steps：
Step 1, temperature is set in data processing unit and resolves module, it includes according to heat transfer theory which, which resolves module,
The Heat Conduction Differential Equations of foundation；The temperature resolves module according to the environment temperature real-time resolving quilt around the measurand of acquisition
The temperature for surveying object changes with time course, and used formula is the difference equation by being obtained after differential equation discretization,
Difference equation is as follows：
aPTP=aETE+aWTW+aNTN+aSTS+aFTF+aBTB+b
Wherein,
aE=DeA(|Pe|)+max(-Fe, 0), aW=DwA(|Pw|)+max(Fw,0)
aN=DnA(|Pn|)+max (- Fn, 0), aS=DsA(|Ps|)+max(Fs,0)
aF=DfA(|Pf|)+max(-Ff, 0), aB=DbA(|Pb|)+max(Fb,0)
In formula, TP、TE、TW、TN、TS、TF、TBRespectively represent the temperature at unit P, E, W, N, S, F, B, aP、aE、aW、aN、
aS、aF、aBRespectively represent the thermal conductivity at unit P, E, W, N, S, F, B, De、Dw、Dn、Ds、Df、DbRepresentative unit E, W, N, S, F, B circle
Expansion at face is led, Fe、Fw、Fn、Fs、Ff、FbThe hot-fluid of the interfaces representative unit E, W, N, S, F, B, Pe、Pw、Pn、Ps、Pf、PbIt represents
The Peclet numbers of the interfaces unit E, W, N, S, F, B, A (| P |)=max (0, (and 1-0.1 | P |)5),Respectively represent one
When layer unit P at thermal conductivity and temperature, SC、SPIt is respectively constant and temperature derivative, ρ, c, Δ V difference in linear heat source function
Density, thermal capacitance, the volume of representative unit P, Δ t represent time step.
Step 2, data processing unit is attached with temperature collecting device and host computer respectively；Wherein host computer triggers
The state self-checking command of temperature collecting device, detects the working condition of temperature collecting device.
Step 3, it waits after the completion of connecting, data processing unit receives around the collected measurand of temperature collecting device
Ambient temperature data.
Step 4, the temperature in data processing unit resolves module according to the environment temperature number around the measurand of sampling
It changes with time course according to the temperature of real-time resolving measurand.
Step 5, host computer is changed with time course by receiving the temperature that transmit from data processing unit, to being tested pair
The temperature of elephant is stored, is shown, being analyzed and monitoring.
In conjunction with Fig. 2, contactless online temperature measurement system of the invention, including：
Temperature collecting device, for acquiring the ambient temperature data around measurand；
Data processing unit inside sets temperature and resolves module, solved in real time according to the collected temperature data of temperature collecting device
The temperature for calculating measurand changes with time course；
Host computer changes with time course for receiving the temperature transmitted from data processing unit, to measurand
Temperature is stored, is shown, being analyzed and monitoring.
The temperature set in the data processing unit resolves module, includes the heat conduction differential side established according to heat transfer theory
Journey is as follows using difference equation is obtained after differential equation discretization：
aPTP=aETE+aWTW+aNTN+aSTS+aFTF+aBTB+b
Wherein,
aE=DeA(|Pe |)+max(-Fe, 0), aW=DwA(|Pw|)+max(Fw,0)
aN=DnA(|Pn|)+max(-Fn, 0), aS=DsA(|Ps|)+max(Fs,0)
aF=DfA(|Pf|)+max(-Ff, 0), aB=DbA(|Pb|)+max (Fb,0)
In formula, TP、TE、TW、TN、TS、TF、TBRespectively represent the temperature at unit P, E, W, N, S, F, B, aP、aE、aW、aN、
aS、aF、aBRespectively represent the thermal conductivity at unit P, E, W, N, S, F, B, De、Dw、Dn、Ds、Df、DbRepresentative unit E, W, N, S, F, B circle
Expansion at face is led, Fe、Fw、Fn、Fs、Ff、FbThe hot-fluid of the interfaces representative unit E, W, N, S, F, B, Pe、Pw、Pn、Ps、Pf、PbIt represents
The Peclet numbers of the interfaces unit E, W, N, S, F, B, A (| P |)=max (0, (and 1-0.1 | P |)5),Respectively represent one
When layer unit P at thermal conductivity and temperature, SC、SPIt is respectively constant and temperature derivative, ρ, c, Δ V difference in linear heat source function
Density, thermal capacitance, the volume of representative unit P, Δ t represent time step.
The contactless online thermometry of the present invention, by acquiring the ambient temperature data around measurand, profit
The temperature that module real-time resolving measurand is resolved with the temperature developed based on Heat Conduction Differential Equations can be generally applicable to one kind not
Just the temperature detection of the measurand of its internal temperature is directly measured.
In some instances, the temperature collecting device collected measurand week is received in the data processing unit
After the ambient temperature data enclosed, further include：Module real-time resolving is resolved according to the temperature data by the temperature to be tested
The temperature of object changes with time course.
In some instances, further include：The host computer triggers the temperature collecting device state self-checking command.State is certainly
Working condition of the inspection instruction for detecting temperature collecting device is collected correctly with ensuring that temperature collecting device is working properly
Ambient temperature data.
In some instances, further include：When the host computer judges that the temperature collecting device is in connecting fault, into
Row fault alarm prompts.When serial line interface or CAN interface are disconnected by external electromagnetic signal interference or connection cables,
Will appear system in these cases can not communicate with host computer.Therefore, it is if host computer does not receive after sending out instruction
System response, host computer can determine whether occur failure at this time.
The contactless online temperature measurement system of the present invention, by acquiring the ambient temperature data around measurand, profit
The temperature that module real-time resolving measurand is resolved with the temperature developed based on Heat Conduction Differential Equations can be generally applicable to one kind not
Just the temperature detection of the measurand of its internal temperature is directly measured.
In some instances, the data processing unit receives around the collected measurand of temperature collecting device
Ambient temperature data.
In some instances, the data processing unit is additionally operable to：It is collected according to the temperature collecting device of reception
The temperature data resolve the temperature of module real-time resolving measurand by the temperature and change with time course.
In some instances, the host computer is additionally operable to：Trigger the temperature collecting device state self-checking command.
In some instances, the host computer is additionally operable to：Judge whether the temperature collecting device is in connecting fault, such as
Fruit is then to carry out fault alarm prompt.
Embodiment 1
Fig. 1 is the flow chart according to the contactless online thermometry of the present invention.The present invention is specifically described in conjunction with Fig. 1
A kind of realization process of contactless online thermometry of embodiment：
Step Step1：The temperature for the Heat Conduction Differential Equations exploitation established according to heat transfer theory is resolved into module and is mounted on number
According in processing unit.
Specifically, temperature is resolved module to be mounted on electric board, then electric board is inserted into data processing unit
In slot.
Step Step2：Data processing unit is attached with temperature collecting device and host computer respectively.
Specifically, the cable plug of temperature collecting device is inserted into the interface of data processing unit, then by data processing
The USB interface of unit is inserted into host computer.In one embodiment of the present of invention, temperature collecting device is AD590 type temperature sensors.
Data processing unit has 4 road temperature data receiving channels.
Step Step3：It waits after the completion of connecting, data processing unit receives temperature collecting device collected measurand week
The ambient temperature data enclosed.
Specifically, after successful connection, temperature collecting device acquires the ambient temperature data around measurand, then counts
These temperature datas are received according to processing unit.
Step Step4：Temperature in data processing unit resolve module according to the measurand of sampling around
The temperature of ambient temperature data real-time resolving measurand changes with time course.
Specifically, the temperature in data processing unit resolves module and reads by the collected measurand of temperature collecting device
The initial value and boundary value condition that the ambient temperature data of surrounding is resolved as temperature run the temperature write based on Heat Conduction Differential Equations
Code, the temperature of Real-time solution measurand are resolved, the temperature for obtaining measurand changes with time course.
Step Step5：Host computer changes with time course to quilt by receiving the temperature transmitted from data processing unit
The temperature for surveying object is stored, is shown, being analyzed and monitoring.
Specifically, host computer receive measurand temperature calculation result after in the form of electrical form or text storage and
It has been shown that, convenient for carrying out further performance evaluation and monitoring to measurand.It is wanted in addition, host computer can also trigger self-checking command
Temperature collecting device is asked to carry out state self-test.When host computer judges that temperature collecting device is in connecting fault, then failure is carried out
Alarm.
According to the contactless online thermometry of the present invention, by acquiring the environment temperature number around measurand
According to resolving the temperature of module real-time resolving measurand using the temperature developed based on Heat Conduction Differential Equations, can be generally applicable to
A kind of inconvenience directly measures the temperature detection of the measurand of its internal temperature.
The contactless online temperature measurement system of the present invention, as shown in Fig. 2, including：Temperature collecting device 1, data processing
Unit 2 and host computer 3.Wherein, temperature collecting device 1, for acquiring the ambient temperature data around measurand；Data processing
Unit 2, the temperature for installing exploitation resolve module and according to 1 collected temperature data real-time resolvings of temperature collecting device
The temperature of measurand changes with time course；Host computer 3, for receiving the temperature transmitted from data processing unit 2 at any time
Between variation course the temperature of measurand is stored, is shown, analyze with monitoring.
Specifically, in the present embodiment, temperature collecting device 1 is AD590 type temperature sensors, and data processing unit 2 has
There are 4 road temperature data receiving channels.
In actual application, temperature is resolved into module and is mounted on electric board, electric board is inserted into data processing unit 2
In slot in, the cable plug of temperature collecting device 1 is inserted into the interface of data processing unit 2, then by data processing list
The USB interface of member 2 is inserted into host computer 3, to complete the preparation before system operation.
It waits after the completion of connecting, temperature collecting device 1 acquires the ambient temperature data around measurand, then data processing
Unit 2 receives these temperature datas.
Temperature in data processing unit 2 resolves module and reads around by 1 collected measurand of temperature collecting device
The ambient temperature data initial value and boundary value condition that are resolved as temperature, run the temperature write based on Heat Conduction Differential Equations and resolve
Code, the temperature of Real-time solution measurand, the temperature for obtaining measurand change with time course.
It stores and shows in the form of electrical form or text after the temperature calculation result of the reception measurand of host computer 3,
Convenient for carrying out further performance evaluation and monitoring to measurand.In addition, host computer 3 can also trigger self-checking command requirement temperature
It spends harvester 1 and carries out state self-test.When host computer 3 judges that temperature collecting device 1 is in connecting fault, then failure report is carried out
Alert prompt.
According to the contactless online temperature measurement system of the present embodiment, by acquiring the environment temperature around measurand
Data are resolved the temperature of module real-time resolving measurand using the temperature developed based on Heat Conduction Differential Equations, can be generally applicable in
In the temperature detection of a kind of inconvenient measurand for directly measuring its internal temperature.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
In the case of being detached from the principle of the present invention and objective a variety of change, modification, replacement and modification can be carried out to these embodiments, this
The range of invention is limited by claim and its equivalent.
Claims (3)
1. a kind of contactless online thermometry, which is characterized in that include the following steps：
Step 1, temperature is set in data processing unit and resolves module, it includes being established according to heat transfer theory which, which resolves module,
Heat Conduction Differential Equations；
Step 2, data processing unit is attached with temperature collecting device and host computer respectively；
Step 3, it waits after the completion of connecting, data processing unit receives the environment around the collected measurand of temperature collecting device
Temperature data；
Step 4, it is real according to the ambient temperature data around the measurand of sampling to resolve module for the temperature in data processing unit
When resolve the temperature of measurand and change with time course；
Step 5, host computer is changed with time course by receiving the temperature that is transmitted from data processing unit, to measurand
Temperature is stored, is shown, being analyzed and monitoring；
It is as follows to obtain difference equation after discretization for Heat Conduction Differential Equations described in step 1：
aPTP=aETE+aWTW+aNTN+aSTS+aFTF+aBTB+b
Wherein,
aE=DeA(|Pe|)+max(-Fe, 0), aW=DwA(|Pw|)+max(Fw,0)
aN=DnA(|Pn|)+max(-Fn, 0), aS=DsA(|Ps|)+max(Fs,0)
aF=DfA(|Pf|)+max(-Ff, 0), aB=DbA(|Pb|)+max(Fb,0)
In formula, TP、TE、TW、TN、TS、TF、TBRespectively represent the temperature at unit P, E, W, N, S, F, B, aP、aE、aW、aN、aS、aF、
aBRespectively represent the thermal conductivity at unit P, E, W, N, S, F, B, De、Dw、Dn、Ds、Df、DbThe interfaces representative unit E, W, N, S, F, B
Expansion lead, Fe、Fw、Fn、Fs、Ff、FbThe hot-fluid of the interfaces representative unit E, W, N, S, F, B, Pe、Pw、Pn、Ps、Pf、PbRepresentative unit
E, the Peclet numbers of the interface W, N, S, F, B, A (| P |)=max (0, (and 1-0.1 | P |)5),Respectively represent a period of time layer
Thermal conductivity at unit P and temperature, SC、SPIt is respectively constant and temperature derivative in linear heat source function, ρ, c, Δ V are respectively represented
Density, thermal capacitance, the volume of unit P, Δ t represent time step.
2. contactless online thermometry according to claim 1, which is characterized in that by data described in step 2
Processing unit is attached with temperature collecting device and host computer respectively, and wherein host computer triggers the state of temperature collecting device certainly
Inspection instruction, detects the working condition of temperature collecting device.
3. a kind of contactless online temperature measurement system, which is characterized in that including：
Temperature collecting device, for acquiring the ambient temperature data around measurand；
Data processing unit inside sets temperature and resolves module, according to the collected temperature data real-time resolving quilt of temperature collecting device
The temperature for surveying object changes with time course；
Host computer changes with time course for receiving the temperature transmitted from data processing unit, to the temperature of measurand
It stored, shown, being analyzed and monitoring；
The temperature set in the data processing unit resolves module, includes the Heat Conduction Differential Equations established according to heat transfer theory, adopts
It is as follows with difference equation is obtained after differential equation discretization：
aPTP=aETE+aWTW+aNTN+aSTS+aFTF+aBTB+b
Wherein,
aE=DeA(|Pe|)+max(-Fe, 0), aW=DwA(|Pw|)+max(Fw,0)
aN=DnA(|Pn|)+max(-Fn, 0), aS=DsA(|Ps|)+max(Fs,0)
aF=DfA(|Pf|)+max(-Ff, 0), aB=DbA(|Pb|)+max(Fb,0)
In formula, TP、TE、TW、TN、TS、TF、TBRespectively represent the temperature at unit P, E, W, N, S, F, B, aP、aE、aW、aN、aS、aF、
aBRespectively represent the thermal conductivity at unit P, E, W, N, S, F, B, De、Dw、Dn、Ds、Df、DbThe interfaces representative unit E, W, N, S, F, B
Expansion lead, Fe、Fw、Fn、Fs、Ff、FbThe hot-fluid of the interfaces representative unit E, W, N, S, F, B, Pe、Pw、Pn、Ps、Pf、PbRepresentative unit
E, the Peclet numbers of the interface W, N, S, F, B, A (| P |)=max (0, (and 1-0.1 | P |)5),Respectively represent a period of time layer
Thermal conductivity at unit P and temperature, SC、SPIt is respectively constant and temperature derivative in linear heat source function, ρ, c, Δ V are respectively represented
Density, thermal capacitance, the volume of unit P, Δ t represent time step.
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| CN113566969A (en) * | 2020-04-29 | 2021-10-29 | 福迪威（上海）工业仪器技术研发有限公司 | Device and method for measuring the temperature of an object in a space |
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