CN210346930U - Accurate temperature measurement cold junction compensation arrangement of twelve way thermocouple - Google Patents
Accurate temperature measurement cold junction compensation arrangement of twelve way thermocouple Download PDFInfo
- Publication number
- CN210346930U CN210346930U CN201920994797.XU CN201920994797U CN210346930U CN 210346930 U CN210346930 U CN 210346930U CN 201920994797 U CN201920994797 U CN 201920994797U CN 210346930 U CN210346930 U CN 210346930U
- Authority
- CN
- China
- Prior art keywords
- constant temperature
- temperature
- shell
- cold junction
- twelve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The utility model discloses a can effectively improve accurate temperature measurement cold junction compensation arrangement of twelve way thermocouple of measuring the accurate nature of temperature, including the square box body of bottom surface open-ended integrated into one piece structure with set up resistance, the row of inserting in the constant temperature shell. The utility model integrates the power strip and the constant temperature shell, improves the heat conduction quantity of the negative electrode of the cold end through the power strip, ensures that the cold end temperature of the twelve-path thermocouples is consistent with the temperature value measured by the compensation resistor, solves the deviation of the cold end temperature compensation value measurement of each path of thermocouple during the multi-path temperature measurement, realizes the consistency of the cold end temperature of the twelve-path thermocouples, and reaches the precision requirement of the multi-path temperature measurement; on the other hand, the constant temperature shell can increase the anti-interference performance of the cold end temperature of the thermocouple to the fluctuation of the environmental temperature, the reliability of the temperature measuring system is improved, the accuracy of temperature measurement is realized, and the accuracy of detection of each index of the environmental test chamber in the test process is improved.
Description
Technical Field
The utility model belongs to the technical field of twelve way thermocouple temperature check out test set, especially, relate to an accurate temperature measurement cold junction compensation arrangement of twelve way thermocouples.
Background
At present, when a twelve-path thermocouple in environmental test equipment is used for temperature measurement, a T-type twelve-path thermocouple and a K-type twelve-path thermocouple are commonly used, the hot end of the twelve-path thermocouple is placed in a measurement area, the positive electrode and the negative electrode of a cold end are connected into a measurement plate, the compensation temperature of the cold end is measured by a platinum resistor, in order to ensure the accuracy of the compensation temperature of the cold end and realize accurate temperature measurement, the accuracy is controlled to be 0.1 ℃, the general processing mode is to make the compensation resistor close to the negative electrode of the cold end as much as possible, increase the copper-laying heat conduction of a circuit board, isolation. Therefore, the measurement accuracy of the thermocouple close to the compensation resistor can be controlled to be 0.1 ℃, when the measurement channel is increased, the channel far away from the compensation point cannot achieve accurate temperature measurement, the measurement deviation can be 0.2 ℃ or more, the reliability of the environment test equipment cannot meet the technical requirements at the moment, the technical indexes of temperature field temperature deviation, humidity deviation, temperature fluctuation and temperature uniformity in a test area cannot meet the actual requirements, and the accuracy requirement of multi-path temperature measurement cannot be met.
Therefore, the key for solving the problem is to develop the temperature measurement cold end compensation device for improving the accuracy of the measured temperature.
SUMMERY OF THE UTILITY MODEL
The utility model provides a can effectively improve the accurate temperature measurement cold junction compensation arrangement of twelve way thermocouple of measuring the accurate nature of temperature.
The utility model discloses a following technical scheme realizes: including the constant temperature shell with set up resistance, the row of inserting in the constant temperature shell, the constant temperature shell is the square box body of bottom surface open-ended integrated into one piece structure, along the length of antetheca to seting up the socket of slope between the antetheca of constant temperature shell and roof, and the topside of socket inclines to the back wall, and the cross section that makes the constant temperature shell is three angles and is right angled pentagon structure, the row of inserting sets up on the socket, and detachably is provided with resistance in the constant temperature shell at row of inserting rear.
The utility model has the advantages that:
1. the utility model integrates the power strip and the constant temperature shell, improves the heat conduction quantity of the negative electrode of the cold junction through the power strip, ensures that the cold junction temperature of the twelve-path thermocouples is consistent with the temperature value measured by the compensation resistor, solves the deviation of the cold junction temperature compensation value measurement of each path of the twelve-path thermocouples during the multi-path temperature measurement, realizes the consistency of the cold junction temperature of the twelve-path thermocouples, and meets the precision requirement of the multi-path temperature measurement; on the other hand, the constant temperature shell can increase the anti-interference performance of the cold end temperature of the twelve-path thermocouple to the fluctuation of the environmental temperature, the reliability of the temperature measuring system is improved, the accuracy of temperature measurement is realized, and the accuracy of detection of each index of the environmental test chamber in the test process is improved;
2. the utility model effectively improves the convenience of twelve-path thermocouple wiring operation and the accuracy of multi-path temperature measurement, and is convenient for the accurate control of the temperature and the humidity of the equipment; the problem of inconsistency of the cold end compensation temperature of the multi-path temperature-measuring twelve-path thermocouples is solved, and deviation of the inconsistency of the environmental temperature of each measuring position on the cold end temperature measurement of the multi-path twelve-path thermocouples is eliminated.
Drawings
Fig. 1 is a schematic cross-sectional view of the present invention;
FIG. 2 is a schematic structural view of a thermostatic housing according to the present invention;
fig. 3 is a three-dimensional reference view of the present invention;
reference numbers in the figures: 1-jack, 2-front wall, 3-top wall, 4-end wall, 5-constant temperature strip, 6-fixing plate, 7-resistor and 8-socket.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following detailed description is made with reference to the accompanying drawings.
The accurate temperature measurement cold junction compensation arrangement of twelve way thermocouple as figure 1 ~ 3 includes the constant temperature shell, and sets up resistance 7, the row of inserting 8 in the constant temperature shell, the constant temperature shell is the square box body of bottom surface open-ended integrated into one piece structure, offers the socket 1 of slope along the length of antetheca 2 between the antetheca 2 of constant temperature shell and roof 3, and the top edge of socket 1 slopes to the back wall, and the cross section that makes the constant temperature shell is three angles and is right angled pentagon structure, the row of inserting 8 sets up on socket 1, and detachably is provided with resistance 7 in the constant temperature shell at row of inserting 8 backs.
The rear wall and the top wall 3 of the constant temperature shell are respectively and uniformly provided with constant temperature strips 5 along the length direction from bottom to top.
The inner parts of two end walls 4 of the constant temperature shell are uniformly provided with constant temperature strips 5 along the longitudinal direction or from bottom to top.
The outer parts of the two end walls 4 of the constant temperature shell are respectively provided with a fixing plate 6, and the fixing plate 6 is provided with a fixing hole.
The constant temperature strip 5 and the rear wall and the top wall 3 of the constant temperature shell are all integrally formed.
The constant temperature strip 5 is respectively arranged with the two end walls 4 of the constant temperature shell in an integrated forming way.
The resistor 7 is a platinum thermal resistor, so that the temperature of the cold end of the twelve-path thermocouple is consistent with the temperature value measured by the compensation resistor, the deviation in the circuit is eliminated, and the inaccuracy of the measured data caused by the signal deviation in the circuit of the resistor 7 is avoided.
The socket 8 is a wiring terminal with a double-row jack structure, which is beneficial to the wiring of the positive and negative electrodes of the cold ends of the twelve-path thermocouple and is beneficial to the conduction of heat of the negative electrode of the cold end.
The constant temperature shell is a metal shell, and the thickness of the constant temperature shell is not less than 1 mm.
The constant temperature strip 5 is a heat conduction fin, and is used for guiding and conducting heat, so that the temperature of each temperature area in the constant temperature shell is uniform.
The utility model discloses a working method: when the device works, the device is fixed on a circuit board, the resistor 7 and the power strip 8 are connected with a circuit on the circuit board, the twelve thermocouple input ends are connected to the power strip 8, the constant temperature strip 5 uniformly disperses airflow inside the constant temperature shell and improves the heat conduction quantity of the negative electrode of the cold end inside the constant temperature shell, so that the temperature of each temperature zone inside the constant temperature shell is consistent, the constant temperature shell increases the anti-interference performance of the cold end temperature of the twelve thermocouple to the fluctuation of the ambient temperature, the problem of inconsistent ambient temperature of each measurement position is solved, the consistency of the cold end temperature of the twelve thermocouple is realized, and the precision requirement of multi-path temperature measurement is met.
Claims (10)
1. The utility model provides an accurate temperature measurement cold junction compensation arrangement of twelve way thermocouple, includes the constant temperature shell, and sets up resistance (7), row of inserting (8) in the constant temperature shell, its characterized in that: constant temperature shell is the square box body of bottom surface open-ended integrated into one piece structure, and socket (1) of slope are seted up to the length of following antetheca (2) between antetheca (2) and roof (3) of constant temperature shell, and the topside of socket (1) slopes to the back wall, and the cross section that makes constant temperature shell is three angles and is right angled pentagon structure, it sets up on socket (1) to insert row (8), and detachably is provided with resistance (7) in the constant temperature shell at row (8) rear of inserting.
2. The accurate temperature measurement cold junction compensation arrangement of twelve way thermocouple of claim 1 characterized in that: the rear wall and the top wall (3) of the constant temperature shell are respectively and uniformly provided with constant temperature strips (5) along the length direction from bottom to top.
3. The accurate temperature measurement cold junction compensation arrangement of twelve way thermocouple of claim 1 characterized in that: constant temperature strips (5) are uniformly arranged inside two end walls (4) of the constant temperature shell along the longitudinal direction or from bottom to top.
4. The accurate temperature measurement cold junction compensation arrangement of twelve way thermocouple of claim 1 characterized in that: the outer parts of the two end walls (4) of the constant temperature shell are respectively provided with a fixing plate (6), and the fixing plate (6) is provided with a fixing hole.
5. The accurate temperature measurement cold junction compensation arrangement of twelve way thermocouple of claim 2 characterized in that: the constant temperature strip (5) and the rear wall and the top wall (3) of the constant temperature shell are all integrally formed.
6. The accurate temperature measurement cold junction compensation arrangement of twelve way thermocouple of claim 3 characterized in that: the constant temperature strip (5) is respectively arranged with the two end walls (4) of the constant temperature shell in an integrated forming way.
7. The accurate temperature measurement cold junction compensation arrangement of twelve way thermocouple of claim 1 characterized in that: the resistor (7) is a platinum thermal resistor.
8. The accurate temperature measurement cold junction compensation arrangement of twelve way thermocouple of claim 1 characterized in that: the power strip (8) is a wiring terminal with a double-row jack structure.
9. The accurate temperature measurement cold junction compensation arrangement of twelve way thermocouple of claim 1 characterized in that: the constant temperature shell is a metal shell, and the thickness of the constant temperature shell is not less than 1 mm.
10. The accurate temperature measurement cold junction compensation device of twelve way thermocouple of claim 2, 5 or 6, characterized in that: the constant temperature strip (5) is a heat conduction fin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920994797.XU CN210346930U (en) | 2019-06-28 | 2019-06-28 | Accurate temperature measurement cold junction compensation arrangement of twelve way thermocouple |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920994797.XU CN210346930U (en) | 2019-06-28 | 2019-06-28 | Accurate temperature measurement cold junction compensation arrangement of twelve way thermocouple |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210346930U true CN210346930U (en) | 2020-04-17 |
Family
ID=70192152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920994797.XU Active CN210346930U (en) | 2019-06-28 | 2019-06-28 | Accurate temperature measurement cold junction compensation arrangement of twelve way thermocouple |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210346930U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112577621A (en) * | 2020-12-28 | 2021-03-30 | 中国航天空气动力技术研究院 | Coaxial thermocouple cold junction temperature measuring device and system |
-
2019
- 2019-06-28 CN CN201920994797.XU patent/CN210346930U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112577621A (en) * | 2020-12-28 | 2021-03-30 | 中国航天空气动力技术研究院 | Coaxial thermocouple cold junction temperature measuring device and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101320007A (en) | Material thermal conductivity measurement apparatus by probe method | |
| CN103175861B (en) | Crust thermo-resistance measurement method | |
| CN210346930U (en) | Accurate temperature measurement cold junction compensation arrangement of twelve way thermocouple | |
| CN100424502C (en) | Detecting method for convection heat exchange coefficient and its convection heat coefficient sonsor | |
| CN113588137B (en) | Heat flow sensor calibration device and calibration method | |
| CN203798759U (en) | Glass thermophysical property tester | |
| CN109471037A (en) | A kind of salt bridge-type thermoelectrochemistry battery testing platform quickly tested and its method | |
| CN206756727U (en) | A kind of Seebeck coefficient testing devices | |
| CN201222042Y (en) | Apparatus for measuring material thermal conductivity parameter | |
| CN210719450U (en) | Temperature control electric iron calibrating device | |
| CN101487805A (en) | Apparatus and method for measuring thermal conduction effect | |
| CN205449641U (en) | Metal bath optics temperature measuring device | |
| CN212988425U (en) | Cooling efficiency measuring device | |
| CN113740377A (en) | Flat-plate-shaped sample heat-conducting property testing device based on thermal imaging | |
| CN111239180B (en) | Thermal parameter testing method for uneven structure | |
| CN203432837U (en) | Low temperature brittleness testing device of waterproof material | |
| CN204049615U (en) | A kind of wearable intelligent clinical thermometer | |
| CN207730337U (en) | A kind of " S " test specimen five-shaft numerical control process temperature measuring equipment | |
| CN215953639U (en) | High-precision blood glucose meter | |
| CN220893608U (en) | Plane temperature field measuring device | |
| CN205643206U (en) | A sample platform for thermoelectric parameter testing | |
| CN213364070U (en) | Tester for semiconductor vacuum equipment | |
| CN203855583U (en) | Polymerase chain reaction (PCR) instrument temperature calibration system | |
| CN217276581U (en) | Thermocouple detection reference end processing apparatus | |
| CN219589847U (en) | Temperature coefficient of resistance calibration system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |