CN109540341A - A kind of thermocouple channel calibrating installation and method - Google Patents
A kind of thermocouple channel calibrating installation and method Download PDFInfo
- Publication number
- CN109540341A CN109540341A CN201811442087.2A CN201811442087A CN109540341A CN 109540341 A CN109540341 A CN 109540341A CN 201811442087 A CN201811442087 A CN 201811442087A CN 109540341 A CN109540341 A CN 109540341A
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- China
- Prior art keywords
- thermocouple
- measuring system
- banjo
- calibrating installation
- temperature
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K15/00—Testing or calibrating of thermometers
- G01K15/005—Calibration
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Engines (AREA)
Abstract
Present invention relates particularly to a kind of thermocouple channel calibrating installation and methods, belong to engine test and check field.The calibrating installation includes thermocouple emulator and connector；The connector includes measuring system banjo and measure traverse line.The described method includes: 1) connect calibrating installation；2) instrument simulation device sends emulation signal to measuring system；3) measurement of comparison temperature and verification temperature, obtain check results.The present invention is greatly reduced the time in test cell calibration thermocouple channel, and the amount of labour of worker is greatly reduced, meanwhile, calibration accuracy greatly improves.
Description
Technical field
The invention belongs to engine tests to check field, and in particular to a kind of thermocouple channel calibrating installation and method.
Background technique
Engine is installed to after test bay or before test run, and an important job is calibration test channel.These are logical
The key parameter of the often engine of road measurement, performance and safety concerning engine.Scientific research machine or scientific research machine are turned to criticize
The engine at production initial stage, there are many measurement parameter, and the TCH test channel for needing to calibrate is also very much, wherein just logical comprising thermocouple temperature measurement
Road.For K-type thermocouple since temperature-measuring range is wide, stability is good, and output potential is high, is widely used in field of temperature measurement.Calibrate thermoelectricity
The common practice in even channel is: first separating the small plug connecting on engine with galvanic couple, from small plug hair normal temperature letter
Number, the show value of test macro is compared with standard value, error within the scope of be qualification, otherwise, re-scale logical
Road is calibrated again, until qualification.After having calibrated, separated small plug is returned into dress.
Engine is provided with a large amount of K-type thermocouple temperature measurement channel, and each channel is provided with a large amount of calibration points, Jin Eryao
Emit a large amount of standard signal, each channel measurement range is not quite similar, and calibration point is also not quite similar.Calibrate these channels often
Time-consuming very long, the frequent midway not enough power supply of the standard scale of signalling leads to signal misalignment, makes troubles to calibration.Therefore, very
It is necessary to seek a kind of new method, solve the problems, such as that prover time is long.
Summary of the invention
For the above technical problems, the present invention provides a kind of thermocouple channel calibrating installation, comprising: including thermoelectricity
Even emulator and connector；
The connector includes measuring system banjo and measure traverse line；
The measuring system banjo and measuring system mate；
The measure traverse line includes positive wire and cathode conductor；One end of the positive wire and measuring system are to patching
The anode connection of head, the other end draw two conducting wires, and the end of two conducting wires is set as pass connecting pin；The cathode conductor
One end is connect with the cathode of measuring system banjo, and the other end draws two conducting wires, and the end of two conducting wires is set as hole shape
Connecting pin；
The thermocouple emulator includes instrument simulation device and monitoring form；The instrument simulation device is used for according to verification temperature
Degree emits corresponding thermocouple emulation signal；The monitoring form uses multimeter, the emulation signal for supervisory instrument emulator
Accuracy, avoid the occurrence of instrument simulation device because electric energy it is insufficient caused by emulate the inaccurate problem of signal；
The connecting pin of the instrument simulation device and monitoring form is aciculiform, matches and connect with the end of measure traverse line.
A kind of control method of thermocouple channel calibrating installation, using above-mentioned thermocouple channel calibrating installation, including it is following
Step:
Step 1, compensating wire is separated with measuring system plug, measuring system banjo and measuring system plug is connected
It connects；
Step 2, instrument simulation device sends emulation signal of thermocouple at a temperature of verification to measuring system, while passing through prison
The accuracy of emulation signal is monitored depending on table；
Step 3, measurement temperature and the verification temperature of thermocouple emulator obtained in measuring system are compared, is obtained
To check results.
Beneficial effects of the present invention:
The present invention proposes a kind of thermocouple channel calibrating installation and method, keeps the time in test cell calibration thermocouple channel big
To reduce, the amount of labour of worker is greatly reduced, meanwhile, calibration accuracy greatly improves.
The present invention has rational design, it is easy to accomplish, there is good practical value.
Detailed description of the invention
Fig. 1 is the structural schematic diagram in thermocouple temperature measurement circuit described in the specific embodiment of the invention；
Fig. 2 is the Temperature Distribution schematic diagram in thermocouple temperature measurement circuit described in the specific embodiment of the invention；
Fig. 3 is the structural schematic diagram of connector described in the specific embodiment of the invention.
In figure: 1, thermocouple；2, acting thermocouple plug 3, thermocouple bus plug；4, measuring system；4.1, measuring system is inserted
Head；5, measuring system banjo；6, measure traverse line.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing and embodiment,
Further description is made to the present invention.It should be appreciated that described herein, specific examples are only used to explain the present invention, and
It is not used in the restriction present invention.
The present invention proposes a kind of thermocouple channel calibrating installation and method, calibrates for improving thermocouple channel on engine
Efficiency.
Thermocouple temperature measurement circuit is provided on the engine, as shown in Figure 1, including sequentially connected thermocouple 1, thermoelectricity
Even plug 2, thermocouple bus plug 3 and measuring system 4；Wherein, the measuring system of thermocouple bus plug 3 and measuring system 4
Plug 4.1 is attached；
The thermocouple 1 is K-type compensation lead of thermocouple to the conducting wire between measuring system plug 4.1；
The thermocouple channel, i.e. signal input circuit in measuring system 4.
The engine needs to verify thermocouple channel, traditional method of calibration during scheduling and planning
Are as follows:
1) thermocouple 1 is extractd from acting thermocouple plug 2, thermocouple emulator is connect with acting thermocouple plug 2, is used for
Thermoelectric couple plug 2 sends emulation signal of the thermocouple 1 at a temperature of verification；
2) measurement temperature and the verification temperature of thermocouple emulator obtained in measuring system 4 are compared, is obtained
Check results；
3) above method is repeated, each thermocouple channel is verified.
It is above tradition method of calibration, to acting thermocouple plug 2 send signal when, although measuring system 4 in test cell,
After verifying work carries out a period of time, internal compensation temperature can change, thus cause to mend in environment temperature and measuring system 4
It is inconsistent to repay temperature；And then so that standard signal is differed larger with show value, or even difference 2-3 degree, it is 200 degree or less for range
Measurement channel, if precision be 1%, 2-3 degree error be more than worst error, need to demarcate channel, this to calibration tape come
It is inconvenient.
The present invention, by experimental demonstration, obtains following judgement to optimize traditional method of calibration:
For the K-type compensation lead of thermocouple between acting thermocouple plug 2 to measuring system plug 4.1, surveyed according to thermocouple
The basic rule of temperature, i.e., known to homogeneous conductor rule:
If two thermodes of thermocouple 1 are made of both of which matter conductor, the thermo-electromotive force of thermocouple 1 is only with two
The measurement end temperature T of a electrode contact is related, unrelated with the Temperature Distribution along thermode；
According to medium temperature rule:
In thermocouple temperature measurement circuit, as shown in Fig. 2, the measurement end temperature of thermocouple 1 is T, compensating wire both ends temperature
Respectively Tn, T0；If thermode (A, B) is identical as the electric heating property of corresponding compensating wire (A ', B '), thermocouple temperature measurement
Total thermo-electromotive force EABB ' A ' (T, Tn, T0) in circuit is equal to the heat of thermo-electromotive force EAB (T, the Tn) and compensating wire of thermocouple 1
The algebraical sum of electromotive force EA ' B ' (Tn, T0), i.e.,
EABB ' A ' (T, Tn, T0)=EAB (T, Tn)+EA ' B ' (Tn, T0).
Determined according to above, in checking procedure, thermocouple emulator is connect with acting thermocouple plug 2, is changed to and surveys
It measures system plug 4.1 to connect, on measurement result without influence.
Accordingly, the present invention proposes a kind of thermocouple channel calibrating installation, including thermocouple emulator and connector；
The connector is as shown in figure 3, include measuring system banjo 5 and measure traverse line 6；
The measuring system banjo 5 is matched with measuring system plug 4.1；
The measure traverse line 6 includes positive wire and cathode conductor；It is docked with measuring system one end of the positive wire
The anode connection of plug 5, the other end draw two conducting wires, and the end of two conducting wires is set as pass connecting pin；The cathode is led
One end of line is connect with the cathode of measuring system banjo 5, and the other end draws two conducting wires, and the end of two conducting wires is set as
Hole shape connecting pin；
The thermocouple emulator includes instrument simulation device and monitoring form；The instrument simulation device is used for according to verification temperature
Degree emits corresponding thermocouple emulation signal；The monitoring form uses multimeter, the emulation signal for supervisory instrument emulator
Accuracy, avoid the occurrence of instrument simulation device because electric energy it is insufficient caused by emulate the inaccurate problem of signal；
The connecting pin of the instrument simulation device and monitoring form is aciculiform, matches and connect with the end of measure traverse line 6.
The present invention proposes a kind of control method of thermocouple channel calibrating installation, using above-mentioned thermocouple channel calibration cartridge
It sets, comprising the following steps:
Step 1, compensating wire is separated with measuring system plug 4.1, measuring system banjo 5 is inserted with measuring system
First 4.1 connection；
Step 2, instrument simulation device sends emulation signal of the thermocouple 1 at a temperature of verification to measuring system 4, passes through simultaneously
The accuracy of monitoring form monitoring emulation signal；
Step 3, measurement temperature and the verification temperature of thermocouple emulator obtained in measuring system 4 are compared,
Obtain check results.
Using above method, the time for calibrating galvanic couple is also considerably reduced, and considerably reduces the workload of worker, work effect
Rate is obviously improved.Moreover, carrying out signal monitoring with monitoring form while instrument simulation device sends emulation signal, signal ensure that
Accuracy.
Claims (2)
1. a kind of thermocouple channel calibrating installation characterized by comprising thermocouple emulator and connector；
The connector includes measuring system banjo and measure traverse line；
The measuring system banjo and measuring system mate；
The measure traverse line includes positive wire and cathode conductor；One end of the positive wire and measuring system banjo
Anode connection, the other end draw two conducting wires, and the end of two conducting wires is set as pass connecting pin；One end of the cathode conductor
It is connect with the cathode of measuring system banjo, the other end draws two conducting wires, and the end of two conducting wires is set as the connection of hole shape
End；
The thermocouple emulator includes instrument simulation device and monitoring form；The instrument simulation device is used for according to verification temperature,
Emit corresponding thermocouple emulation signal；The monitoring form uses multimeter, the emulation signal for supervisory instrument emulator
Accuracy avoids the occurrence of instrument simulation device because emulating the inaccurate problem of signal caused by electric energy deficiency；
The connecting pin of the instrument simulation device and monitoring form is aciculiform, matches and connect with the end of measure traverse line.
2. a kind of control method of thermocouple channel calibrating installation, using thermocouple channel calibrating installation described in claim 1,
It is characterized in that, comprising the following steps:
Step 1, compensating wire is separated with measuring system plug, measuring system banjo is connect with measuring system plug；
Step 2, instrument simulation device sends emulation signal of thermocouple at a temperature of verification to measuring system, while passing through monitoring form
The accuracy of monitoring emulation signal；
Step 3, measurement temperature and the verification temperature of thermocouple emulator obtained in measuring system are compared, obtains school
Test result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811442087.2A CN109540341A (en) | 2018-11-29 | 2018-11-29 | A kind of thermocouple channel calibrating installation and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811442087.2A CN109540341A (en) | 2018-11-29 | 2018-11-29 | A kind of thermocouple channel calibrating installation and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109540341A true CN109540341A (en) | 2019-03-29 |
Family
ID=65850998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811442087.2A Pending CN109540341A (en) | 2018-11-29 | 2018-11-29 | A kind of thermocouple channel calibrating installation and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109540341A (en) |
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2018
- 2018-11-29 CN CN201811442087.2A patent/CN109540341A/en active Pending
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Application publication date: 20190329 |