CN104748890A - Thermocouple detecting device - Google Patents
Thermocouple detecting device Download PDFInfo
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- CN104748890A CN104748890A CN201510128880.5A CN201510128880A CN104748890A CN 104748890 A CN104748890 A CN 104748890A CN 201510128880 A CN201510128880 A CN 201510128880A CN 104748890 A CN104748890 A CN 104748890A
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- thermocouple
- thermopair
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- reference thermocouple
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Abstract
The invention provides a thermocouple detecting device, and aims at detecting at least one thermocouple to be detected through a reference thermocouple. The device is characterized by comprising a heat source supply part, an acquiring part, an determining outputting part and a display part, wherein the heat source supply part is in contact with a heat end of the reference thermocouple and the heat end of the thermocouple to be detected, comprising a heat source unit for supplying heat energy to the reference thermocouple and the thermocouple to be detected; the acquiring part is respectively connected with the reference thermocouple and the thermocouple to be detected and used for acquiring thermoelectric potential of the reference thermocouple and the thermocouple to be detected; the determining outputting part comprises determining unit for determining whether the difference between the thermoelectric potential of the thermocouple to be detected and the thermoelectric potential energy of the reference thermocouple is within the preset range, and an outputting unit for outputting the determining result of the determining unit; the display part is connected with the outputting unit and used for displaying the determining result.
Description
Technical field
The invention belongs to detection field, be specifically related to a kind of thermocouple detection device utilizing reference thermocouple to treat calorimetric galvanic couple to carry out detecting.
Background technology
Thermopair is temperature element conventional in industrial thermometric, temperature measuring instrument, it utilizes Seebeck principle to convert the temperature signal of measured medium to electric signal and namely converts thermopower signal to, is then converted to the temperature data of measured medium by electric meter.So the potentiometric of thermocouple wire is the important indicator judging its quality good or not.The profile of various thermopair is often far from it because of needs, but be all made up of the thermocouple material that positive and negative the two poles of the earth are different, and in relevant GB and industry standard, there is clear and definite tolerance to the homogeneity of the thermoelectrical potential performance at positive and negative the two poles of the earth and fixed point electromotive force, and also have clear and definite regulation to method of testing.
In prior art, when testing for different thermopairs, existing test macro often adopts the method for cold junction compensation, the temperature utilizing the proportionate relationship between temperature and thermoelectrical potential to calculate thermopair to record, then the performance of thermopair is judged, this method can be suitable in a certain temperature range, but not accurate enough for the temperature range of other scopes.In addition, existing checkout equipment scarcely has portability, can not detect intuitively.
Summary of the invention
The present invention carries out to solve above-mentioned problem, and object is to provide a kind of and detects multiple thermopair to be measured and have that degree of accuracy is high, easy to carry, the thermocouple detection device of the advantage of intuitive display.
The invention provides a kind of thermocouple detection device, reference thermocouple is utilized to detect at least one thermopair to be checked, it is characterized in that, comprise: thermal source supply department, contact with the hot junction of reference thermocouple and the hot junction of thermopair to be checked, comprise: for providing the heat source unit of heat energy to reference thermocouple and thermopair to be checked; Collection portion, is connected with thermopair to be checked with reference thermocouple respectively, for gathering the thermoelectrical potential of reference thermocouple and thermopair to be checked; Judge efferent, comprise: judge difference between the thermoelectrical potential of thermopair to be checked and the thermoelectricity potential energy of the reference thermocouple judging unit whether in preset range, the judged result obtained by judging unit carries out the output unit that exports; And display part, be connected with output unit and judged result is shown.
At thermocouple detection device provided by the present invention, can also have such feature: wherein, collection portion comprises: for the electric signal that formed after gathering the heat energy of reference thermocouple and thermocouple induction thermal source to be checked respectively collecting unit, carry out electric signal to be converted to the converting unit of thermoelectrical potential.
At thermocouple detection device provided by the present invention, also there is such feature: wherein, wherein, thermal source supply department also comprises: be set in the hot junction of reference thermocouple and the hot junction of thermopair to be checked and insulating tube for being incubated, the hot junction of insulating tube to the hot junction of reference thermocouple and at least one thermopair to be checked is incubated.
At thermocouple detection device provided by the present invention, also have such feature: wherein, thermal source supply department also comprises: for regulating the regulon of the temperature of heat source unit.
The effect of invention
According to thermocouple detection device involved in the present invention, because heat source unit carries out homogeneous heating to the hot junction of reference thermocouple and the hot junction of thermopair to be measured simultaneously, improve the accuracy of measurement, the thermoelectrical potential of reference thermocouple and thermopair to be measured is gathered again by collection portion, based on preset range, judging unit judges that the thermoelectrical potential of thermopair to be measured is whether in predetermined acceptability limit according to the difference of the thermoelectrical potential of thermopair to be measured and the thermoelectrical potential of reference thermocouple, then, by output unit, judged result is exported, display part shows judged result, make testing result more accurate by the thermoelectrical potential of direct thermopair more to be measured and reference thermocouple, so thermocouple detection device of the present invention more accurately can detect the performance of thermopair to be measured, and it is more directly perceived to have display, advantage easy to carry.
Accompanying drawing explanation
Fig. 1 is the structural representation of thermocouple detection device in embodiments of the invention;
Fig. 2 is the workflow diagram of thermocouple detection device in embodiments of the invention.
Embodiment
The technological means realized to make the present invention, creation characteristic, reach object and effect is easy to understand, following examples are specifically addressed thermocouple detection device of the present invention by reference to the accompanying drawings.
Fig. 1 is the structural representation of thermocouple detection device in embodiments of the invention.
As shown in Figure 1, by selecting a reference thermocouple 100 that is up-to-standard, better performances to carry out quality versus's detection as reference standard to multiple thermopair 200 to be measured.Thermocouple detection device 300 pairs of reference thermocouples 100 and thermopair to be measured 200 detect simultaneously and contrast the testing result obtaining thermopair 200 to be measured.
Thermocouple detection device 300 comprises: thermal source supply department 31, collection portion 32, judge efferent 33 and display part 34.
Thermal source supply department 31 is for providing even heat energy to the hot junction 10a of the reference thermocouple 100 and hot junction 20a of multiple thermopair to be measured 200 simultaneously, and thermal source supply department 31 comprises: heat source unit 31a, insulating tube 31b and regulon 31c.Insulating tube 31b is set on hot junction 10a and hot junction 20a.Insulating tube 31b is connected with heat source unit 31a, and the uniform thermal power that heat source unit 31a provides by insulating tube 31b stably passes to hot junction 10a and hot junction 20a.Regulon 31c is located on heat source unit 31a for regulating heat source unit 31a output temperature.
Collection portion 32, for gathering the calorific potential energy of reference thermocouple 100 and thermopair to be measured 200, comprises: collecting unit 32a and converting unit 32b.Reference thermocouple 100 and thermopair to be measured 200 one_to_one corresponding are arranged on the corresponding port place of collecting unit 32a, collecting unit 32a gathers the electric signal after the heat energy that reference thermocouple and thermocouple induction heat source unit 31a to be checked send respectively, then, by converting unit 32b, electric signal is carried out analog to digital conversion and obtain corresponding thermoelectrical potential.In the present embodiment, the function by adopting the data collecting card with analog conversion function and communication function to realize collection portion 32.
Judge that efferent 33 is connected by serial ports with collection portion 32, judge that efferent 33 comprises: comparing unit 33a, judging unit 33b, output unit 33c and storage unit 33d.The thermoelectrical potential of multiple thermopair 200 to be measured compares with the thermoelectrical potential of reference thermocouple 100 by comparing unit 33a respectively, obtains difference between the two.The thermoelectrical potential that storage unit 33d treats calorimetric galvanic couple 200 stores with the thermoelectrical potential of reference thermocouple 100 respectively, and store for judging qualified preset range, according to the difference that comparing unit 33a obtains, judging unit 33b judges whether it is in preset range, thus obtain judged result.This judged result exports by output unit 33c.
Display part 34 is connected with output unit 33c, and treat calorimetric galvanic couple 200 thermoelectrical potential and, the thermoelectrical potential of reference thermocouple 100 and judged result show.According to this display result, operator can judge that whether thermopair to be measured is qualified intuitively.
Fig. 2 is the workflow diagram of thermocouple detection device in embodiments of the invention
As shown in Figure 2, in the present embodiment, thermocouple detection device 300 is treated the course of work that calorimetric galvanic couple 200 carries out detecting and is comprised the following steps:
Step S1, installs thermopair, is arranged on the corresponding port of collecting unit 32a, and is placed on one piece with reference to the exit of thermopair 100 and thermopair to be measured 200, so enter step S2 with reference to thermopair 100 and thermopair to be measured 200.
Step S2, with reference to thermopair 100 and thermopair to be measured 200 exit namely, hot junction 10a and hot junction 20a is placed in insulating tube 31b, then, the temperature by regulating rear adjustment heat source unit 31a to regulon 31c is needed according to test, there is provided heat energy to reference thermocouple 100 and thermopair to be measured 200, then enter step S3.
Step S3, collecting unit 32a are captured in the electric signal of reference thermocouple 100 and thermopair to be measured 200 at this thermal source 31a temperature, then by converting unit 32b, this electric signal are converted to thermoelectrical potential, then enter step S4.
The thermoelectrical potential of thermoelectrical potential and reference thermocouple 100 that step S4, comparing unit 33a treat calorimetric galvanic couple 200 compares, and obtains the difference between them, then enters step S5.
Step S5, judging unit 33b is according to difference and judge based on preset range, when judging that difference is in preset range, entering step S6a, when judging that difference exceeds preset range, entering step S6b.
Step S6a, the qualified information of display part 40 display quality, finally enters end.
Step S6b, the defective information of display part 40 display quality, then enters end.
The effect of embodiment and effect
Thermocouple detection device involved by the present embodiment, because heat source unit carries out homogeneous heating to the hot junction of reference thermocouple and the hot junction of thermopair to be measured simultaneously, improve the accuracy of measurement, the thermoelectrical potential of reference thermocouple and thermopair to be measured is gathered again by collection portion, based on preset range, judging unit judges that the thermoelectrical potential of thermopair to be measured is whether in predetermined acceptability limit according to the difference of the thermoelectrical potential of thermopair to be measured and the thermoelectrical potential of reference thermocouple, then, by output unit, judged result is exported, display part shows judged result, make testing result more accurate by the thermoelectrical potential of direct thermopair more to be measured and reference thermocouple, so the thermocouple detection device of the present embodiment more accurately can detect the performance of thermopair to be measured, and it is more directly perceived to have display, advantage easy to carry.
In the thermocouple detection device of the present embodiment, because heat-insulating cover is located on reference thermocouple and thermopair to be checked, make the temperature stabilization of reference thermocouple and thermopair to be checked, thus make the accuracy of detection of this device higher.
In the thermocouple detection device of the present embodiment, because regulon regulates the temperature of heat source unit, realize regulating according to the temperature of practical measurement requirement to thermal source, improve the work efficiency of this device.
Above-mentioned embodiment is preferred case of the present invention, is not used for limiting the scope of the invention.
Claims (4)
1. a thermocouple detection device, utilizes reference thermocouple to detect at least one thermopair to be checked, it is characterized in that, comprising:
Thermal source supply department, comprises: for providing the heat source unit of heat energy to described reference thermocouple and described thermopair to be checked;
Collection portion, is connected with described thermopair to be checked with described reference thermocouple respectively, for gathering the thermoelectrical potential of described reference thermocouple and described thermopair to be checked;
Judge efferent, comprise: judge difference between the thermoelectrical potential of described thermopair to be checked and the thermoelectricity potential energy of the described reference thermocouple judging unit whether in preset range, the judged result obtained by described judging unit carries out the output unit that exports; And
Display part, is connected with described output unit and shows described judged result.
2. thermocouple detection device according to claim 1, is characterized in that:
Wherein, described collection portion comprises: for the electric signal that formed after gathering the heat energy of thermal source described in described reference thermocouple and described thermocouple induction to be checked respectively collecting unit, carry out described electric signal to be converted to the converting unit of described thermoelectrical potential.
3. thermocouple detection device according to claim 1, is characterized in that:
Wherein, described thermal source supply department also comprises: be set in the insulating tube that the hot junction of described reference thermocouple is connected with the hot junction of described thermopair to be checked and with described heat source unit,
Described insulating tube is incubated the hot junction of described reference thermocouple and the hot junction of thermopair to be checked described at least one.
4. thermocouple detection device according to claim 1, is characterized in that:
Wherein, described thermal source supply department also comprises: for regulating the regulon of the temperature of described heat source unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510128880.5A CN104748890A (en) | 2015-03-24 | 2015-03-24 | Thermocouple detecting device |
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| CN201510128880.5A CN104748890A (en) | 2015-03-24 | 2015-03-24 | Thermocouple detecting device |
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Application publication date: 20150701 |