CN207832350U - Temperature sensor high speed Calibration of Dynamic device - Google Patents
Temperature sensor high speed Calibration of Dynamic device Download PDFInfo
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- CN207832350U CN207832350U CN201820093700.3U CN201820093700U CN207832350U CN 207832350 U CN207832350 U CN 207832350U CN 201820093700 U CN201820093700 U CN 201820093700U CN 207832350 U CN207832350 U CN 207832350U
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Abstract
The utility model proposes temperature sensor high speed Calibration of Dynamic devices, including calibration temperature field case, light path system and data acquisition control system；The light path system setting is outside calibration temperature field case, including infrared laser, total reflection mirror and lens subassembly；The laser output of the infrared laser is coaxially set up with total reflection mirror, the lens subassembly is arranged on the reflected light path of total reflection mirror, infrared laser is radiated at being calibrated on temperature sensor in calibration temperature field case, the infrared laser and is calibrated temperature sensor while detecting heat source temperature；The data acquisition control system connection is calibrated temperature sensor and infrared laser.It can not only realize the performance calibration of temperature sensor high speed dynamic characteristic, while it calibrates temperature broad quantum and adjustable；Combination using optical system to laser and optical lens needs that temperature sensor is made to generate quick temperature jump, while ensureing that high-temperature field does not have an impact low temperature field around.
Description
Technical field
The utility model is related to high-speed temperature measurement technical field, more particularly to a kind of temperature sensor high speed dynamic characteristic
Calibrating installation.
Background technology
With development in science and technology, high speed dynamic temperature measurement has extensive need in fields such as mechanical dynamic system, nuclear power systems
It asks.Temperature is to characterize the physical quantity of the cold and hot degree of object, is had in fields such as scientific research, daily life, health care, industrial and agricultural productions
It and is widely applied.And dynamic temperature especially high speed dynamic temperature (i.e. temperature field high speed changes) is measured in Thermal Equipment, is moved
There is very important status in the fields such as power machinery, engine, pressure vessels for the chemical industry, nuclear energy engineering, especially in mechanical dynamic system
The accurate measurement in field, dynamic temperature is related to lifetime of system and Performance Evaluation.
Temperature sensor dynamic response characteristic refers to the relationship between the temperature of sensor and measured medium temperature increment, one
As indicated with the form of the differential equation or transmission function.The good temperature sensor of dynamic characteristic, output temperature change over time
Rule will reproduce the rule that input temp changes over time, i.e., the function of time having the same simultaneously.
But there are the following problems in high speed dynamic temperature measurement：(1) existing sensor response speed does not catch up with dynamic
The speed of temperature change, i.e., due to the thermal inertia of sensor temperature sensing device and limited heat transfer so that measured temperature and practical temperature
There are difference for degree.It is too long in the response time that time domain representation is sensor, it cannot correctly reflect the quick variation of input signal, deposit
In dynamic response error.(2) dynamic characteristic of ideal temperature sensor is sensor regardless of dynamic exciting size, dynamic school
Accurate structure is all identical (or's very close to).And actually sensor can not possibly realize ideal dynamic in gamut scope
Linear transducer.(3) when the dynamic characteristic of temperature sensor is unsatisfactory for requiring, how to improve its dynamic characteristic, this is also to pass
Problem encountered in sensor practical application.
Therefore, it is necessary to carry out the research of temperature sensor high speed dynamic characteristic, that is, the high speed dynamic for being directed to sensor is special
Property demarcated, obtain the dynamic response curve of sensor, determine the dynamic performance index of sensor, and then to sensor dynamic
Performance is modified, and realizes the accurate measurement of temperature sensor high speed dynamic characteristic.
Utility model content
The purpose of this utility model aims to solve at least one of the technological deficiency.
To achieve the goals above, it is special to provide a kind of temperature sensor high speed dynamic for the embodiment of the utility model one side
Property calibrating installation, including calibration temperature field case, light path system and data acquisition control system；The light path system setting is being calibrated
Outside the case of temperature field, including infrared laser, total reflection mirror and lens subassembly；The laser output of the infrared laser with it is complete
Speculum is coaxially set up, and the lens subassembly is arranged on the reflected light path of total reflection mirror, and the infrared laser is radiated at school
Being calibrated on temperature sensor in quasi- temperature field case, the infrared laser and is calibrated temperature sensor while detecting heat source
Temperature；The data acquisition control system connection is calibrated temperature sensor and infrared laser.
Preferably, the data acquisition control system includes sensor transducer circuit, signal amplification circuit filter and control
Circuit processed；The input terminal connection of the sensor transducer circuit is calibrated the signal output end of temperature sensor, and sensor becomes
The output end of device circuit is sent to be sequentially connected signal amplification circuit filter and control circuit.
Preferably, the control circuit includes MCU processor, display interface and relay；The MCU processor passes through aobvious
Show that interface connection shows screen；The relay connects infrared laser.
Further, calibration temperature field case is additionally provided with thermocouple, and the thermocouple is connected with relay.
Preferably, the lens subassembly includes collector lens, spherical lens；The total reflection mirror and collector lens and level
Direction is placed in 45 degree of overturning angles, and the collector lens is arranged in parallel with total reflection mirror, and positioned at the lower section of total reflection mirror, reflection
In the middle part of light path face spherical lens.
Preferably, the infrared laser includes infrared detector and CO2 lasers；The infrared detector is thermoelectricity system
Cold mould cadmium-telluride-mercury infrared detector.
Preferably, calibration temperature field case is additionally provided with electronic thermometer, and the electronic thermometer is connected with control circuit
It connects.
According to a kind of temperature sensor high speed Calibration of Dynamic device that the utility model embodiment provides, compared to existing
Some calibrating device for temperature sensor, have at least the following advantages, first, which can not only realize that temperature passes using laser
The performance calibration of sensor high speed dynamic characteristic, while it calibrates temperature broad quantum and adjustable；Using optical system to laser
And on the one hand the combination of optical lens needs that temperature sensor is made to generate quick temperature jump, while ensureing that high-temperature field is not right
Surrounding low temperature field has an impact；Infrared laser is precisely controlled using controller, realizes the negative step of temperature sensor
Temperature Excitation, the dynamic characteristic of the accurate measuring temperature sensor of energy, to realize dynamic calibration.It its automatic the characteristics of calibrating, can
To reduce the risk that human error brings, keep data processing more objective, efficient, to improve the quality of work.
The additional aspect of the utility model and advantage will be set forth in part in the description, partly will be from following description
In become apparent, or recognized by the practice of the utility model.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the utility model will in the description from combination following accompanying drawings to embodiment
Become apparent and is readily appreciated that, wherein：
Fig. 1 is the structure diagram for the temperature sensor high speed Calibration of Dynamic device that the utility model embodiment provides；
Fig. 2 is the connection structure for the temperature sensor high speed Calibration of Dynamic device that the utility model embodiment provides
Figure；
In figure, 1, light path system；2, temperature field case is calibrated；101, infrared laser；102, total reflection mirror；103, lens group
Part；201, it is calibrated temperature sensor；202, sensor transducer circuit；203, signal amplification circuit filter；204, control electricity
Road.
Specific implementation mode
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and should not be understood as to the utility model
Limitation.
As shown in Figure 1, a kind of temperature sensor high speed Calibration of Dynamic device that the utility model embodiment provides, packet
Include calibration temperature field case 2, light path system 1 and data acquisition control system；Light path system setting is outside calibration temperature field case, packet
Include infrared laser 101, total reflection mirror 102 and lens subassembly 103；The laser output and total reflection mirror of infrared laser 101
102 coaxially set up, and lens subassembly 103 is arranged on the reflected light path of total reflection mirror 102, and infrared laser 101 is radiated at calibration
Being calibrated on temperature sensor 201 in temperature field case 2, infrared laser 101 and is calibrated temperature sensor 201 while detecting
Heat source temperature；Data acquisition control system connection is calibrated temperature sensor 201 and infrared laser 101.
Data acquisition control system includes sensor transducer circuit 202, signal amplification circuit filter 203 and control circuit
204；The input terminal connection of sensor transducer circuit 202 is calibrated the signal output end of temperature sensor 201, sensor pick-up
The output end of device circuit 202 is sequentially connected signal amplification circuit filter 203 and control circuit 204.Control circuit 204 includes MCU
Processor, display interface and relay；MCU processor is connected by display interface and shows screen；Relay connects infrared laser
Device 101.Calibration temperature field case 2 is additionally provided with thermocouple, and thermocouple is connected with relay.
As shown in Fig. 2, lens subassembly 103 includes collector lens 104, spherical lens 105；Total reflection mirror 102 and optically focused are saturating
Mirror is placed with horizontal direction in 45 degree of overturning angles, and collector lens is arranged in parallel with total reflection mirror 102, and is located at total reflection mirror 102
Lower section, in the middle part of reflected light path face spherical lens.
Infrared laser 101 includes infrared detector and CO2 lasers；Infrared detector is that thermoelectric cooling type mercury cadmium telluride is red
External detector.Calibration temperature field case 2 is additionally provided with electronic thermometer, and electronic thermometer is connected with control circuit 204.Controller root
The fitting of temperature sensor temperature curve is carried out according to the temperature information of electronic thermometer acquisition.
Operation principle is, dynamic stimulating signal is generated by CO2 lasers, laser irradiation in dut temperature sensor surface,
Cause surface transient temperature rise, with the temperature sensor and laser that are calibrated while heat source is measured, infrared acquisition
Own temperature is sent to controller by device, since the frequency response characteristic of infrared detector is much better than the temperature sensing being calibrated
Device, therefore the curve measured by laser calibrates the dynamic individual features for being calibrated temperature sensor as foundation, and
Obtain systematic error revision value.
In the present invention, thermal response time refers to the temperature variation of temperature sensor and is equivalent to the step temperature of application
The time required to when some regulation percentage of excitation, 10%, 50% and 90% institute for reaching step Temperature Excitation need to be usually recorded
Take time τ0.1, τ0.5And τ0.9；It is timeconstantτ when reaching the time needed for the 63.2% of step Temperature Excitation.The required ginseng
Number directly can accurately be read by signal acquiring system.
It can be further right after obtaining temperature sensor time constant according to first-order dynamic receptance function in higher mathematics
Sensor dynamic property is improved, generally it can be thought that the dynamic response function of temperature sensor is first order inertial loop, i.e.,：
Formula (1)
T (n)=T ' (n)+τ Δ T ' (n)/Δ t (1)
T (n) is the true temperature value of sensor surrounding medium in formula, and T ' (n) is temperature sensor measured value, by this
Difference equation solves, and can obtain：Formula (2)
T (m)=[1+j τ (2 π m/N)] T ' (m) (2)
N is the sample number of sampling in formula, which is the revised Fourier transformation for measuring actual value, is by inverse transformation
The true temperature value of medium is can get, realizes the amendment to temperature sensor dynamic property.
Based on above-mentioned theory basis, temperature sensor high speed dynamic property calibration process includes two steps：
Gamut is divided into three sections by the first step, and the step temperature of first stage is the 20%-30% of full scale, second-order
The step temperature of section is the 45%-55% of full scale, and the step temperature of phase III is the 70%-80% of full scale；
Second step, continuously to be measured 3-6 times per the stage, each measured value and multiple mean deviation are less than 10%
When, it is believed that effectively；The average value that multistage, repeatedly number measured is as final detector time constant.The process can guarantee wide amount
The validity of journey temperature sensor dynamic property calibration.
The root mean square σ for further seeking multiple time constant T, it is dynamic as characterization sensor in the percentage of time constant
State repeatability；And A class uncertainties UAIt is directly made of σ, B class uncertainties UBMainly by the resolution ratio of signal acquiring system
It determines, and then determines final uncertainty of measurement U.
Finally according to the value obtained in measurement process, measurement median is listed on metering report, final argument value, not really
Fixed degree and sensor joint with improved dynamic behaviour method, to complete the calibration process of entire temperature sensor high speed dynamic characteristic.
Using in above-mentioned existing thermodynamics, higher mathematics formula calculates, you can in the distinctive structure of the utility model
On the basis of realize temperature sensor high speed Calibration of Dynamic.Further, a kind of temperature provided according to the utility model embodiment
Sensor high speed Calibration of Dynamic device is spent to have at least the following advantages compared to existing calibrating device for temperature sensor,
First, which can not only realize the performance calibration of temperature sensor high speed dynamic characteristic, while its calibration temperature using laser
Spend broad quantum and adjustable；On the one hand combination using optical system to laser and optical lens needs to make temperature sensor
Quick temperature jump is generated, while ensureing that high-temperature field does not have an impact low temperature field around；Using controller to infrared laser
Device is precisely controlled, and realizes the negative step Temperature Excitation of temperature sensor, can accurate measuring temperature sensor dynamic characteristic,
To realize dynamic calibration.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term
It states and may not refer to the same embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be
It can be combined in any suitable manner in any one or more embodiments or example.
Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it should not be understood as limiting the present invention, those skilled in the art are not departing from the utility model
Principle and objective in the case of above-described embodiment can be changed in the scope of the utility model, change, replace and
Modification.The scope of the utility model is by appended claims and its equivalent limits.
Claims (7)
1. a kind of temperature sensor high speed Calibration of Dynamic device, which is characterized in that including calibration temperature field case, light path system
And data acquisition control system；The light path system setting is outside calibration temperature field case, including infrared laser, total reflection mirror
And lens subassembly；The laser output of the infrared laser is coaxially set up with total reflection mirror, and the lens subassembly is arranged complete
On the reflected light path of speculum, the infrared laser is radiated at being calibrated on temperature sensor in calibration temperature field case, institute
It states infrared laser and is calibrated temperature sensor while detecting heat source temperature；The data acquisition control system connection is calibrated
Temperature sensor and infrared laser.
2. temperature sensor high speed Calibration of Dynamic device according to claim 1, which is characterized in that the data are adopted
It includes sensor transducer circuit, signal amplification circuit filter and control circuit to collect control system；The sensor transducer electricity
The input terminal connection on road is calibrated the signal output end of temperature sensor, and the output end of sensor transducer circuit is sequentially connected letter
Number filtering and amplifying circuit and control circuit.
3. temperature sensor high speed Calibration of Dynamic device according to claim 2, which is characterized in that the control electricity
Road includes MCU processor, display interface and relay；The MCU processor is connected by display interface and shows screen；It is described after
Electric appliance connects infrared laser.
4. temperature sensor high speed Calibration of Dynamic device according to claim 1, which is characterized in that the lens group
Part includes collector lens, spherical lens；The total reflection mirror and collector lens are placed with horizontal direction in 45 degree of overturning angles, described
Collector lens is arranged in parallel with total reflection mirror, and in the middle part of the lower section of total reflection mirror, reflected light path face spherical lens.
5. temperature sensor high speed Calibration of Dynamic device according to claim 1, which is characterized in that described infrared sharp
Light device includes infrared detector and CO2 lasers；The infrared detector is thermoelectric cooling type cadmium-telluride-mercury infrared detector.
6. temperature sensor high speed Calibration of Dynamic device according to claim 3, which is characterized in that the calibration temperature
Degree field case is additionally provided with thermocouple, and the thermocouple is connected with relay.
7. temperature sensor high speed Calibration of Dynamic device according to claim 1, which is characterized in that the calibration temperature
Degree field case is additionally provided with electronic thermometer, and the electronic thermometer is connected with control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201820093700.3U CN207832350U (en) | 2018-01-19 | 2018-01-19 | Temperature sensor high speed Calibration of Dynamic device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820093700.3U CN207832350U (en) | 2018-01-19 | 2018-01-19 | Temperature sensor high speed Calibration of Dynamic device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115855317A (en) * | 2023-02-21 | 2023-03-28 | 山东省科学院海洋仪器仪表研究所 | Thermistor temperature sensor response speed testing device and method |
-
2018
- 2018-01-19 CN CN201820093700.3U patent/CN207832350U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115855317A (en) * | 2023-02-21 | 2023-03-28 | 山东省科学院海洋仪器仪表研究所 | Thermistor temperature sensor response speed testing device and method |
| CN115855317B (en) * | 2023-02-21 | 2023-06-16 | 山东省科学院海洋仪器仪表研究所 | Device and method for testing response speed of thermistor temperature sensor |
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