CN205826173U - A kind of test system of quick response hot thermocouple response time - Google Patents
A kind of test system of quick response hot thermocouple response time Download PDFInfo
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- CN205826173U CN205826173U CN201620786261.5U CN201620786261U CN205826173U CN 205826173 U CN205826173 U CN 205826173U CN 201620786261 U CN201620786261 U CN 201620786261U CN 205826173 U CN205826173 U CN 205826173U
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- thermocouple
- data acquisition
- speed data
- response time
- high speed
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Abstract
This utility model discloses the test system of a kind of quick response hot thermocouple response time.It is made up of single-chip microcomputer, electrical switch, laser instrument, thermocouple, ice-water bath container, high speed data acquisition system, computer；Described single-chip microcomputer electrical connection electrical switch, described electrical switch electrical connection laser instrument, described thermocouple has two terminations, it is to measure end and reference edge respectively, the measurement end of described laser illumination thermocouple, the reference edge of described thermocouple is put into described ice-water bath container and is carried out ice-water bath, one line of thermocouple measurement end connects the positive terminal of described high speed data acquisition system, one line of described thermocouple reference edge connects the negative terminal of described high speed data acquisition system, and described computer connects described high speed data acquisition system.The thermal response time of thermocouple is measured by this test system, result accurately and reliably, equipment simple, practicality is preferable.
Description
Technical field
This utility model belongs to thermocouple assay technical field, when especially relating to a kind of quickly response hot thermocouple response
Between test system.
Background technology
Thermocouple sensor simple in construction, low price, measurement scope are wide, are widely used in commercial production.Commonly
Hot thermocouple response time is general all at more than 2s, it is difficult to meet the requirement to transient temperature under specific operation.Quickly respond
Hot thermocouple response time is the shortest, reaches ms magnitude or μ s magnitude, can meet transient temperature measuring requirement.Thermal response time characterizes heat
The sensitivity of galvanic couple, is the most individual critically important index of thermoelectricity.JB/T9238-1999 specifies thermal response time or time constant
Refer to when Spline smoothing occurs in temperature, the exporting change of thermoelectricity occasionally thermal resistance to be equivalent to this Spline smoothing 50% needed for
Time, and temperature jump the most generally used now change 63.2% needed for time.
Thermal response time test conventional throw-in play, hot air wind tunnel method, electrical heating method, shock wave tube method, the Laser Modulation of thermocouple
Methods etc., are respectively arranged with pluses and minuses.As slow due to staff reaction in throw-in play, to uncomfortable when there is the thermocouple measurement of less thermal response time
With；Hot air wind tunnel method equipment is complicated, cost of use is expensive, input signal is not preferable step signal, to fast thermocouple
When calibrating, bigger error can be produced；Electrical heating method has the problems referred to above too；Shock wave tube method is producing temperature jump
The time of rear holding is short, it is impossible to makes thermocouple output response reach stable state, therefore also cannot obtain reliable time constant value；Laser
Modulation method is due to its function admirable, good, unfortunately to the thermal response time measurement result of millisecond and sub-millisecond magnitude thermocouple
Complete equipment is complicated, expensive, is not easy to be widely used.
Utility model content
For problem present in background technology, the purpose of this utility model is that proposing one quickly responds hot thermocouple
The test system of response time.
For realizing above-mentioned technical purpose, this utility model adopts the following technical scheme that and is achieved:
The test system of a kind of quick response hot thermocouple response time, by single-chip microcomputer, electrical switch, laser instrument, thermoelectricity
Idol, ice-water bath container, high speed data acquisition system, computer composition；Described single-chip microcomputer electrical connection electrical switch, described electrical switch
Electrical connection laser instrument, described thermocouple has two terminations, is to measure end and reference edge respectively, described laser illumination thermocouple
Measuring end, the reference edge of described thermocouple is put into described ice-water bath container and is carried out ice-water bath, a line of thermocouple measurement end
Connecting the positive terminal of described high speed data acquisition system, a line of described thermocouple reference edge connects described high-speed data acquisition
The negative terminal of device, described computer connects described high speed data acquisition system.
Preferably, described single-chip microcomputer is 8051 series monolithics.
Preferably, described electrical switch is power field effect pipe.
Preferably, described laser instrument be a wavelength be the red laser of 650nm.
Preferably, described thermocouple refers to the diameter microfilament thermocouple in 10～50 μm.
The beneficial effects of the utility model are:
1, the thermal response time of thermocouple is measured by this test system, result accurately and reliably, equipment simple, practicality
Preferably, the measurement problem for the thermal response time of solution thermocouple has bigger practical value.
2, this test system utilizes single-chip microcomputer, electrical switch, infrared laser can obtain preferable positive and negative step temperature.
The high speed data acquisition system that model is 3560C of B&K company of Denmark integrates filtering and enlarging function, can be directly used for thermoelectricity
Even thermometric, need not the most individually designed amplifying circuit and filter circuit, therefore can quick and precisely collect the thermoelectrical potential value of experiment, survey
The thermal response time of examination can reach ms level.
Accompanying drawing explanation
Fig. 1 is the test system schematic of the thermal response time of thermocouple.
Fig. 2 is the thermoelectrical potential of the thermocouple that test the obtains response curve to step temperature.
Fig. 3 is the enlarged drawing of I section in Fig. 2.
Wherein: 1-single-chip microcomputer；2-electrical switch；3-laser instrument；4-thermocouple；5-ice-water bath container；6-high-speed data is adopted
Storage；7-computer.
Detailed description of the invention
The utility model is described in further detail below in conjunction with the accompanying drawings:
As shown in Figure 1 to Figure 3, the survey of a kind of quick response hot thermocouple response time that this utility model embodiment provides
Test system, by single-chip microcomputer 1, electrical switch 2, laser instrument 3, thermocouple 4, ice-water bath container 5, high speed data acquisition system 6, computer
7 compositions.Described single-chip microcomputer 1 electrically connects electrical switch 2, and described electrical switch 2 electrically connects laser instrument 3, and described thermocouple 4 has two
Termination, is to measure end and reference edge respectively, and described laser instrument 3 irradiates the measurement end of thermocouple 4, the reference edge of described thermocouple 4
Putting into described ice-water bath container 5 and carry out ice-water bath, thermocouple 4 is measured a line of end and is connected described high speed data acquisition system 6
Positive terminal, line of described thermocouple 4 reference edge connects the negative terminal of described high speed data acquisition system 6, described meter
Calculation machine 7 connects described high speed data acquisition system 6.
Described single-chip microcomputer 1 is 8051 series monolithics.Described electrical switch 2 is power field effect pipe, and it responds speed
Degree is within 5 μ s.Described laser instrument 3 is the common red laser of small-power using a wavelength to be 650nm, produces excitation heat
Source.Described thermocouple 4 is atomic thin fine copper silk and the thermocouple of constantan wire welding of a diameter of 10～50 μm.Described ice-water bath
Container 5 is built with ice and aqueous mixtures, and temperature is 0 DEG C.Described high speed data acquisition system 6 is to collect filtering with enlarging function in one
The high speed data acquisition system that model is 3560C that the B&K company of Denmark of body produces, its sample frequency maximum can reach 25.6KHz,
Need not the most individually designed amplifying circuit and filter circuit.Described computer 7 is common computer, installs height in common computer
7700 platform softwares that speed data acquisition unit carries, can carry out data process.
The effect of electrical switch 2: when utilizing single-chip microcomputer 1 to control output high level, electrical switch 2 disconnects, laser instrument 3 not work
Make；When being output as low level, electrical switch 2 closes, and laser instrument 3 works immediately.Step temperature is being produced in order to record thermocouple 4
Front initial temperature signal, single-chip microcomputer 1, before output low level, persistently exports one section of high level.Therefore start at single-chip microcomputer 1
First open high speed data acquisition system 6 before work and record initial temperature signal, be then turned on single-chip microcomputer 1 and control electrical switch 2 and close
Conjunction allows laser instrument 3 work immediately, and high speed data acquisition system 6 continuous acquisition thermocouple 4 starts to producing step temperature from initial temperature
The response signal of whole process after degree.Additionally, the termination time of laser instrument 3 heating should be 5 times of thermocouple 4 thermal response time with
On.
This test system work process is: before experiment starts, and is first placed in by thermocouple 4 good for static demarcating stable
Room temperature air-flow in, to laser focusing so that it is focus is narrowly focused towards thermocouple 4 and measures end and fix, then by thermocouple 4 another
End is placed in ice-water bath container 5 as reference edge.Successively open high speed data acquisition system 6 and single-chip microcomputer 1 power supply, by high speed number
Record thermocouple 4 according to harvester 6, during heating-cooling, the thermoelectrical potential of step temperature is responded signal, computer 7 processes
Data obtain the thermocouple 4 response curve to step temperature, and then obtain its thermal response time.
As in figure 2 it is shown, quick response thermocouple 4 thermoelectrical potential that Fig. 2 is test to be obtained is bent to the response of step temperature
Line, in figure, U represents thermoelectrical potential, and t represents the testing time.Thermoelectrical potential response curve over time can be divided into 3 stages: rises
Section I be heating period, horizontal segment II be the dynamic thermal balance stage, descending branch III be cooling stage.Fig. 3 is ascent stage I in Fig. 2
Enlarged drawing, according to graph data, waveform voltage amplitude is 13.8mv, and corresponding step temperature reaches 318 DEG C, from the response obtained
Can directly read on curve thermocouple 4 indicate the difference of temperature and initial temperature reach temperature jump 63.2% needed for time,
The thermal response time of this thermocouple 4 is about 118.8ms.In like manner, when descending branch III produces negative temperature step, the heat of thermocouple 4 is rung
115.2ms it is about between Ying Shi.Then the evenly heat response time of this thermocouple 4 is about 117ms.
Obviously, those skilled in the art can carry out various change and modification without deviating from this practicality to this utility model
Novel spirit and scope.So, if of the present utility model these amendment and modification belong to this utility model claim and
Within the scope of its equivalent technologies, then this utility model is also intended to comprise these change and modification.
Claims (5)
1. the test system of a quick response hot thermocouple response time, it is characterised in that: by single-chip microcomputer, electrical switch, swash
Light device, thermocouple, ice-water bath container, high speed data acquisition system, computer form；Described single-chip microcomputer electrical connection electrical switch；Institute
State electrical switch electrical connection laser instrument；Described thermocouple has two terminations, is to measure end and reference edge respectively；Described laser instrument shines
Penetrating the measurement end of thermocouple, the reference edge of described thermocouple is put into described ice-water bath container and is carried out ice-water bath, thermocouple measurement
One line of end connects the positive terminal of described high speed data acquisition system, and a line of described thermocouple reference edge connects described height
The negative terminal of speed data acquisition unit, described computer connects described high speed data acquisition system.
The test system of quick response hot thermocouple response time the most according to claim 1, it is characterised in that: described
Single-chip microcomputer is 8051 series monolithics.
The test system of quick response hot thermocouple response time the most according to claim 1, it is characterised in that: described
Electrical switch is power field effect pipe.
The test system of quick response hot thermocouple response time the most according to claim 1, it is characterised in that: described
Laser instrument be a wavelength be the red laser of 650nm.
The test system of quick response hot thermocouple response time the most according to claim 1, it is characterised in that: described heat
Galvanic couple refers to the diameter microfilament thermocouple in 10～50 μm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620786261.5U CN205826173U (en) | 2016-07-25 | 2016-07-25 | A kind of test system of quick response hot thermocouple response time |
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| CN201620786261.5U CN205826173U (en) | 2016-07-25 | 2016-07-25 | A kind of test system of quick response hot thermocouple response time |
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| CN205826173U true CN205826173U (en) | 2016-12-21 |
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| CN201620786261.5U Expired - Fee Related CN205826173U (en) | 2016-07-25 | 2016-07-25 | A kind of test system of quick response hot thermocouple response time |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107101749A (en) * | 2017-06-14 | 2017-08-29 | 中国计量大学 | Fast-response thermocouple dynamic characteristic calibration system and method based on small-sized detonation |
| CN108414118A (en) * | 2017-02-10 | 2018-08-17 | 山西润玖汽车配件科技有限公司 | A kind of automobile-used high temperature sensor geo-thermal response test method |
| CN108871619A (en) * | 2018-04-27 | 2018-11-23 | 重庆大学 | A kind of high speed thermocouple time constant measuring device and measurement method |
| CN111006793A (en) * | 2019-12-18 | 2020-04-14 | 北京航空航天大学 | K-type armored thermocouple response time measuring method based on heat pipe method |
| CN111565625A (en) * | 2017-12-26 | 2020-08-21 | 罗伯特·博世有限公司 | System and method for detecting thickness of layer |
| CN111765992A (en) * | 2020-06-23 | 2020-10-13 | 合肥晶浦传感科技有限公司 | Temperature sensor response time detection system |
-
2016
- 2016-07-25 CN CN201620786261.5U patent/CN205826173U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108414118A (en) * | 2017-02-10 | 2018-08-17 | 山西润玖汽车配件科技有限公司 | A kind of automobile-used high temperature sensor geo-thermal response test method |
| CN107101749A (en) * | 2017-06-14 | 2017-08-29 | 中国计量大学 | Fast-response thermocouple dynamic characteristic calibration system and method based on small-sized detonation |
| CN111565625A (en) * | 2017-12-26 | 2020-08-21 | 罗伯特·博世有限公司 | System and method for detecting thickness of layer |
| CN111565625B (en) * | 2017-12-26 | 2024-03-26 | 罗伯特·博世有限公司 | System and method for detecting thickness of layer |
| CN108871619A (en) * | 2018-04-27 | 2018-11-23 | 重庆大学 | A kind of high speed thermocouple time constant measuring device and measurement method |
| CN111006793A (en) * | 2019-12-18 | 2020-04-14 | 北京航空航天大学 | K-type armored thermocouple response time measuring method based on heat pipe method |
| CN111765992A (en) * | 2020-06-23 | 2020-10-13 | 合肥晶浦传感科技有限公司 | Temperature sensor response time detection system |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161221 Termination date: 20170725 |