CN207366095U - A kind of cold-junction compensation terminal for thermocouple temperature measurement - Google Patents
A kind of cold-junction compensation terminal for thermocouple temperature measurement Download PDFInfo
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- CN207366095U CN207366095U CN201721140354.1U CN201721140354U CN207366095U CN 207366095 U CN207366095 U CN 207366095U CN 201721140354 U CN201721140354 U CN 201721140354U CN 207366095 U CN207366095 U CN 207366095U
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Abstract
The utility model is created and provides a kind of cold-junction compensation terminal for thermocouple temperature measurement, including cold junction compensation terminal shell and auxiliary temperature sensors；Auxiliary temperature sensors are installed on inside cold junction compensation terminal shell；The ventilation hole for leading to auxiliary temperature sensors is equipped with cold junction compensation terminal shell.Auxiliary temperature sensors are directly installed on inside cold junction compensation terminal shell by the cold-junction compensation terminal, it is abutted with thermocouple cold junction or is directly contacted, make the temperature of thermocouple cold junction and temperature that aiding sensors measure is consistent, so as to effectively avoid the precision of cold junction compensation and electric thermo-couple temperature measurement accuracy from being affected due to the temperature error of cold end.
Description
Technical field
The invention is related to a kind of temperature-compensating terminal, especially a kind of cold-junction compensation for thermocouple temperature measurement
Terminal.
Background technology
Thermocouple is made of two kinds of different plain conductors of chemical composition, their one end welds together, and is put into tested
In medium, it is known as hot junction, the other end is cold end.Its thermoelectrical potential produced is the function table of two junction temperatures, only works as cold end
When temperature-resistant, thermoelectricity potential is only the monotropic function of hot-side temperature, moreover, the data provided in thermocouple indexing table are with 0
DEG C it is reference point.In practical application, thermocouple cold junction local environment temperature is often not 0 DEG C, and always has fluctuation, so that measurement
It is worth less than correctly as a result, so cold junction compensation measure must be taken.
Cold junction compensation measure at present is very much, and all measures are substantially nothing more than being exactly with another temperature sensing in cold end position
The temperature that device (auxiliary temperature sensors) is measured does cold junction compensation.But since the difference of actual product structure, auxiliary temperature pass
Sensor, which, does not reflect the actual temperature of cold end, causes the system temperature precision that thermocouple is measured poor, so that not reaching and being
The requirement of system.The hot junction of thermocouple sensor is connected to tested end, and cold end is connected to test instrumentation.Under normal conditions, it is connected to instrument
Side is connected in instrument with wire connection terminal.
The content of the invention
The invention technical problems to be solved are that temperature sensor is arranged in test instrumentation in the prior art, meeting
Influenced be subject to test instrumentation self-temperature, rather than directly measure the actual temperature of cold end terminal, necessarily cause temperature-compensating
The problem of inaccurate.
In order to solve the above-mentioned technical problem, the invention provides a kind of cold-junction compensation for thermocouple temperature measurement
Terminal, including cold junction compensation terminal shell and auxiliary temperature sensors；Auxiliary temperature sensors are installed on cold junction compensation terminal casing
Internal portion；The ventilation hole for leading to auxiliary temperature sensors is equipped with cold junction compensation terminal shell.
It is directly installed on using auxiliary temperature sensors inside cold junction compensation terminal shell, itself and thermocouple cold junction is abutted
Or directly contact, cold junction temperature can be accurately measured, reliable basis are provided for temperature-compensating；Auxiliary is not only made using ventilation hole
The temperature that temperature sensor measures is consistent with environment temperature, and measures the temperature of thermocouple cold junction and aiding sensors
Temperature be consistent so that effectively avoid cold junction compensation precision and electric thermo-couple temperature measurement accuracy due to cold end
Temperature error and be affected.
As the further limits scheme of the invention, cold junction compensation terminal shell by front end shell, metal pressing line frame,
Fixing bolt and terminal rear cover are formed；Slot is equipped with the rear side of front end shell, mounting hole is equipped with the top of front end shell；
Threaded hole is equipped with the top of metal pressing line frame；Metal pressing line frame is in slot, and threaded hole is corresponding with mounting hole；Auxiliary
Temperature sensor is inserted on metal pressing line frame；Fixing bolt is screwed on the threaded hole of metal pressing line frame through mounting hole, and
The screw rod end of fixing bolt, which is pressed against in auxiliary temperature sensors, to be fixed；The front side of front end shell be equipped be used for it is auxiliary
The plug connector elements for helping temperature sensor signal line to be electrically connected；Terminal rear cover is sealed on the rear side of terminal front end housing；Ventilation hole position
Covered after terminal.Plug connector elements are equipped with using in the front side of front end shell, can realize the mark of cold junction compensation terminal shell
Change inserting, without doing larger improvement to existing test equipment, directly inserted on the outside of test equipment, make cold-junction compensation
Terminal markization is patched can be achieved accurate cold junction temperature measurement at cold thermocouple end position, easy to use, and not
It can be influenced be subject to test equipment internal temperature itself.
As the further limits scheme of the invention, two slots are equipped with the rear side of front end shell；In nose shell
The front side of body is equipped with two conductive sheets extended respectively in two slots as interconnecting devices；It is equipped with the top of front end shell
Two mounting holes；Auxiliary temperature sensors include installation base plate and the temperature-sensing element being arranged on installation base plate；Pacifying
Dress substrate is equipped with the parallel conductive cutting of two-way and is electrically connected respectively with two signal ends of temperature-sensing element；Two metal pressures
Wire frame is respectively embedded into two slots；Two conductive sheets are inserted into two metal pressing line frames respectively；Two-way conduction cutting is inserted respectively
Enter in two metal pressing line frames；The screw rod end of fixing bolt presses conductive sheet in conductive cutting.Using in front end shell
Front side can meet Two-port netwerk standard as interconnecting devices equipped with two conductive reeds extended respectively in two slots and patch
The directly inserting application of terminal, without being improved too much the port on existing test instrumentation.
As the further limits scheme of the invention, three slots, front end shell are equipped with the rear side of front end shell
Top be equipped with three mounting holes；Auxiliary temperature sensors include installation base plate and the temperature sensing being arranged on installation base plate
Element；Be equipped with the parallel conductive cutting in three tunnels on installation base plate, wherein the cutting of two-way conduction respectively with temperature-sensing element
Two signal ends are electrically connected；Three metal pressing line frames are respectively embedded into three slots；Three tunnel conduction cuttings are inserted into three respectively
On metal pressing line frame, and the end of three tunnel conduction cuttings is stretched out by the front side of front end shell and forms interconnecting devices；Fixing bolt
Screw rod end is pressed against in conductive cutting；Covered after terminal equipped with three wiring holes, three wiring holes respectively with three metals
The position of pressing line frame is corresponding, and three wiring holes form three ventilation holes.Using the end of three tunnel conduction cuttings by nose shell
The direct inserting application for forming and can meeting three port standard plug terminals as interconnecting devices is stretched out in the front side of body, without to existing
There is the port on test instrumentation to be improved too much.
The beneficial effect of the invention is：Cold junction compensation terminal shell is directly installed on using auxiliary temperature sensors
Inside, it is abutted with thermocouple cold junction or is directly contacted, can accurately measure cold junction temperature, is provided reliably for temperature-compensating
Foundation；The temperature that auxiliary temperature sensors measure is consistent with environment temperature using ventilation hole, but also make thermocouple
The temperature of cold end is consistent with the temperature that aiding sensors measure, so as to effectively avoid the precision and heat of cold junction compensation
Galvanic couple temperature measurement accuracy is affected due to the temperature error of cold end.
Brief description of the drawings
Fig. 1 is the two core cold junction compensation terminal configuration schematic diagrams of the invention；
Fig. 2 is the three core cold junction compensation terminal configuration schematic diagrams of the invention；
Fig. 3 is the two core cold junction compensation terminal assembly structure diagrams of the invention；
Fig. 4 is the three supporting plug structure schematic diagrames of core cold junction compensation terminal of the invention；
Fig. 5 is that the two core cold junction compensation terminals of the invention use structure diagram；
Fig. 6 is that the three core cold junction compensation terminals of the invention use structure diagram.
In figure:1st, front end shell, 2, slot, 3, mounting hole, 4, limit hole, 5, fixing bolt, 6, conductive cutting, 7, conductive
Piece, 8, temperature-sensing element, 9, metal pressing line frame, 10, threaded hole, 11, rectangular opening, 12, terminal rear cover, 13, ventilation hole, 14,
Convex block, 15, notch, 16, three core terminal plugs, 17, two core terminal sockets, 18, test instrumentation, 19, thermocouple cold junction or compensation
Conducting wire, 20, three core terminal sockets.
Embodiment
As shown in figures 1 to 6, the disclosed cold-junction compensation terminal for thermocouple temperature measurement of the invention includes：Cold end
Compensate terminal shell and auxiliary temperature sensors；
Wherein, auxiliary temperature sensors are installed on inside cold junction compensation terminal shell；Set on cold junction compensation terminal shell
There is the ventilation hole 13 for leading to auxiliary temperature sensors；Cold junction compensation terminal shell is by front end shell 1, metal pressing line frame 9, fixed spiral shell
Bolt 5 and terminal rear cover 12 are formed；Slot 2 is equipped with the rear side of front end shell 1, mounting hole is equipped with the top of front end shell 1
3 and limit hole 4；Threaded hole 10 is equipped with the top of metal pressing line frame 9；Metal pressing line frame 9 is in slot 2, and threaded hole
10 is corresponding with mounting hole 3；Auxiliary temperature sensors are inserted on the rectangular opening 11 of metal pressing line frame 9；Fixing bolt 5 passes through peace
Dress hole 3 is screwed on the threaded hole 10 of metal pressing line frame 9, and the screw rod end of fixing bolt 5 is pressed against auxiliary temperature sensors
On be fixed；The plug connector elements for being used for being electrically connected with auxiliary temperature sensors signal wire are equipped with the front side of front end shell 1；End
Sub- rear cover 12 is sealed on the rear side of terminal front end housing 1, and the convex block in embedded limit hole 4 is equipped with the upside of terminal rear cover 12
14, the notch 15 being buckled on 1 downside edge of front end shell is equipped with the lower side of terminal rear cover 12；Ventilation hole 13 is located at
On terminal rear cover 12.
A kind of embodiment of the invention is two core cold junction compensation terminals, i.e.,：Two are equipped with the rear side of front end shell 1
A slot 2；In the front side of front end shell 1 interconnecting devices are used as equipped with two conductive sheets 7 extended respectively in two slots 2；
Two mounting holes 3 are equipped with the top of front end shell 1；Auxiliary temperature sensors include installation base plate and are arranged on installation base plate
On temperature-sensing element 8；Two of the parallel conductive cutting 6 of two-way respectively with temperature-sensing element 8 are equipped with installation base plate
A signal end is electrically connected；Two metal pressing line frames 9 are respectively embedded into two slots 2；Two conductive sheets 7 are inserted into two metals respectively
In the rectangular opening 11 of pressing line frame 9；Two-way conduction cutting 6 is inserted into the rectangular opening 11 of two metal pressing line frames 9 respectively；Fixing bolt
5 screw rod end presses conductive sheet 7 in conductive cutting 6.When mounted, in test instrumentation 18 at cold thermocouple end position
The two core terminal sockets 17 equipped with standard, the inner core of two core terminal sockets 17 are connected with the microprocessor of test instrumentation 18, are used for
Collecting temperature signal；The conductive sheet 7 as interconnecting devices of two core cold junction compensation terminals is directly inserted into two core terminal of standard
It can be used on socket 17；Thermocouple cold junction or compensating wire 19 are directly installed on original position, without change.
The another embodiment of the invention is three core cold junction compensation terminals, i.e.,：It is equipped with the rear side of front end shell 1
Three slots 2, the top of front end shell 1 are equipped with three mounting holes 3；Auxiliary temperature sensors include installation base plate and are arranged on
Temperature-sensing element 8 on installation base plate；The parallel conductive cutting 6 in three tunnels is equipped with installation base plate, wherein two-way is conductive inserts
Bar 6 is electrically connected with two signal ends of temperature-sensing element 8 respectively；Three metal pressing line frames 9 are respectively embedded into three slots 2；
Three tunnel conduction cuttings 6 are inserted on the rectangular opening 11 of three metal pressing line frames 9 respectively, and the end of three tunnel conduction cuttings 6 is by preceding
The front side of end housing 1, which is stretched out, forms interconnecting devices；The screw rod end of fixing bolt 5 is pressed against in conductive cutting 6 and is fixed；
Terminal rear cover 12 is equipped with three wiring holes, and three wiring holes are opposite with 11 position of rectangular opening of three metal pressing line frames 9 respectively
Should, and three wiring holes form three ventilation holes 13.Using the conductive cutting 6 of three core cold junction compensation terminals as interconnecting devices socket
On three core terminal plugs 16 of standard, then three core terminal plugs 16 are inserted into three core terminals of standard on test instrumentation 18 and are inserted
Seat 20 on, the microprocessor of three core terminal sockets, 20 two paths of signals connecting test instrument 18, all the way signal connection thermocouple cold junction
Or compensating wire 19；Specifically, thermocouple cold junction or compensating wire 19 connect the crura intermedium of three core terminals, three core terminals remaining two
Terminate the signal end of aiding sensors.
Claims (3)
- A kind of 1. cold-junction compensation terminal for thermocouple temperature measurement, it is characterised in that：Including cold junction compensation terminal shell and Auxiliary temperature sensors；Auxiliary temperature sensors are installed on inside cold junction compensation terminal shell；On cold junction compensation terminal shell Equipped with the ventilation hole for leading to auxiliary temperature sensors；Cold junction compensation terminal shell is by front end shell, metal pressing line frame, fixing bolt And terminal rear cover is formed；Slot is equipped with the rear side of front end shell, mounting hole is equipped with the top of front end shell；In metal pressure The top of wire frame is equipped with threaded hole；Metal pressing line frame is in slot, and threaded hole is corresponding with mounting hole；Auxiliary temperature senses Device is inserted on metal pressing line frame；Fixing bolt is screwed on the threaded hole of metal pressing line frame through mounting hole, and fixing bolt Screw rod end be pressed against in auxiliary temperature sensors and be fixed；It is equipped with the front side of front end shell and is used to pass with auxiliary temperature The plug connector elements that sensor signal line is electrically connected；Terminal rear cover is sealed on the rear side of terminal front end housing；After ventilation hole is located at terminal Cover.
- 2. the cold-junction compensation terminal according to claim 1 for thermocouple temperature measurement, it is characterised in that：In nose shell The rear side of body is equipped with two slots；Two conductive sheet conducts extended respectively in two slots are equipped with the front side of front end shell Interconnecting devices；Two mounting holes are equipped with the top of front end shell；Auxiliary temperature sensors include installation base plate and are arranged on Temperature-sensing element on installation base plate；Be equipped with installation base plate the parallel conductive cutting of two-way respectively with temperature-sensing element Two signal ends be electrically connected；Two metal pressing line frames are respectively embedded into two slots；Two conductive sheets are inserted into two gold respectively Belong in pressing line frame；The cutting of two-way conduction is inserted into two metal pressing line frames respectively；The screw rod end pressing conductive sheet of fixing bolt In conductive cutting.
- 3. the cold-junction compensation terminal according to claim 1 for thermocouple temperature measurement, it is characterised in that：In nose shell The rear side of body is equipped with three slots, and the top of front end shell is equipped with three mounting holes；Auxiliary temperature sensors include installation base plate And it is arranged on the temperature-sensing element on installation base plate；The parallel conductive cutting in three tunnels is equipped with installation base plate, wherein two Road conduction cutting is electrically connected with two signal ends of temperature-sensing element respectively；Three metal pressing line frames are respectively embedded into three slots It is interior；Before three tunnel conduction cuttings are inserted on three metal pressing line frames respectively, and the end of three tunnel conduction cuttings is by front end shell Side, which is stretched out, forms interconnecting devices；The screw rod end of fixing bolt is pressed against in conductive cutting；Cover after terminal and connect equipped with three String holes, three wiring holes are corresponding with the position of three metal pressing line frames respectively, and three wiring holes form three ventilation holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721140354.1U CN207366095U (en) | 2017-09-07 | 2017-09-07 | A kind of cold-junction compensation terminal for thermocouple temperature measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721140354.1U CN207366095U (en) | 2017-09-07 | 2017-09-07 | A kind of cold-junction compensation terminal for thermocouple temperature measurement |
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| Publication Number | Publication Date |
|---|---|
| CN207366095U true CN207366095U (en) | 2018-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721140354.1U Active CN207366095U (en) | 2017-09-07 | 2017-09-07 | A kind of cold-junction compensation terminal for thermocouple temperature measurement |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107402079A (en) * | 2017-09-07 | 2017-11-28 | 南京优倍电气有限公司 | A kind of cold-junction compensation terminal for thermocouple temperature measurement |
-
2017
- 2017-09-07 CN CN201721140354.1U patent/CN207366095U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107402079A (en) * | 2017-09-07 | 2017-11-28 | 南京优倍电气有限公司 | A kind of cold-junction compensation terminal for thermocouple temperature measurement |
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