CN220288822U - Temperature sensor - Google Patents
Temperature sensor Download PDFInfo
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- CN220288822U CN220288822U CN202321888101.8U CN202321888101U CN220288822U CN 220288822 U CN220288822 U CN 220288822U CN 202321888101 U CN202321888101 U CN 202321888101U CN 220288822 U CN220288822 U CN 220288822U
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- thermocouple
- sensor
- lead
- thermal resistor
- probe
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- 239000000523 sample Substances 0.000 claims abstract description 26
- 230000000694 effects Effects 0.000 abstract description 12
- 230000002411 adverse Effects 0.000 abstract description 6
- 238000003466 welding Methods 0.000 description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 6
- 238000012545 processing Methods 0.000 description 5
- 230000002035 prolonged effect Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 4
- 239000000395 magnesium oxide Substances 0.000 description 4
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 4
- 239000011810 insulating material Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 229910052697 platinum Inorganic materials 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000009529 body temperature measurement Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The utility model discloses a temperature sensor, and belongs to the technical field of sensors. The temperature sensor comprises a probe, wherein the probe is used for measuring temperature, the probe comprises a shell and a combined sensor, the shell is used for protecting the combined sensor, the combined sensor is located inside the probe and comprises a thermal resistor and a thermocouple, the thermocouple comprises a first thermocouple and a second thermocouple, and the thermal resistor is connected with the first thermocouple and the second thermocouple respectively. The utility model comprises a thermocouple and a thermal resistor at the same time, and can be used for applications requiring two different inputs; the condition of adverse effect on the thermocouple in the utility model can not affect the thermal resistance, and the condition of adverse effect on the thermal resistance can not affect the thermocouple, so that the combined sensor is equivalent to the provision of a standby sensor in the same probe, can be selected according to actual conditions, expands the application range and relatively reduces the cost.
Description
Technical Field
The utility model belongs to the technical field of sensors, and particularly relates to a temperature sensor.
Background
The integrated temperature sensor generally consists of a temperature measuring housing (thermocouple or thermal resistance sensor) and a two-wire solid electronic unit. The temperature measuring probe is directly installed in the junction box in a solid module form, so that an integrated sensor is formed. The integrated temperature sensor is generally classified into a thermal resistor type and a thermocouple type.
The thermal resistance temperature sensor consists of a reference unit, an R/V conversion unit, a linear circuit, a reverse connection protection, a current limiting protection, a V/I conversion unit and the like. After the temperature measurement thermal resistance signal is converted and amplified, the nonlinear relation between the temperature and the resistance is compensated by a linear circuit, and a constant current signal of 4-20 mA which is in linear relation with the measured temperature is output after the temperature measurement thermal resistance signal is converted and amplified by a V/I conversion circuit.
The thermocouple temperature sensor generally comprises a reference source, a cold end compensation unit, an amplifying unit, linearization processing, V/I conversion, decoupling processing, reverse connection protection, current limiting protection and other circuit units. The thermoelectric voltage generated by the thermocouple is compensated and amplified by a cold end, then the nonlinear error of the thermoelectric voltage and the temperature is eliminated by a linear circuit, and finally the thermoelectric voltage is amplified and converted into a 4-20 mA current output signal. In order to prevent accidents caused by temperature control failure due to broken wires of thermocouples in thermocouple measurement, a power-off protection circuit is also arranged in the sensor. When the thermocouple breaks or the disconnection is poor, the sensor outputs a maximum value (28 mA) to cut off the power supply to the meter. The integrated temperature sensor has the advantages of simple structure, lead saving, large output signal, strong anti-interference capability, good linearity, simple display instrument, earthquake resistance, moisture resistance of the solid module, reverse connection protection, current limiting protection, reliable operation and the like. The output of the integrated temperature sensor is a unified 4-20 mA signal; can be matched with microcomputer systems or other conventional meters for use. The user can also request to make an explosion-proof or fireproof measuring instrument.
RTD is an abbreviation for Resistance Temperature Detector, meaning a resistance temperature detector, abbreviated as thermal resistance.
The Resistance Temperature Detector (RTD) is actually a special wire whose resistance varies with temperature, and typically RTD materials include copper, platinum, nickel, and nickel/iron alloys. The RTD element can be a wire or a film, and is coated on the ceramic material substrate by electroplating or sputtering.
The resistance of the RTD is set to be a nominal value of 0 ℃. The resistance of a platinum RTD at 100deg.C is typically 100.39 Ω at 1deg.C and 119.4 Ω at 50deg.C. The RTD has a smaller error than the thermal resistance, typically 0.01% for platinum and 0.5% for nickel. The interface circuits of the RTD and thermistor are substantially identical except for the small error and resistance.
In the existing sensors, some sensors only have thermocouple sensors, some sensors only have thermal resistance sensors, and are only one sensor, so that the application range is small, interfaces of the thermocouple sensors and the thermal resistance sensors are similar, and the thermocouple sensors and the thermal resistance sensors are easy to connect wrongly when wired. When the sensor is applied to the nuclear power equipment, if the wiring is wrong, the maintenance is troublesome due to the particularity of the nuclear power equipment, and the sensor has great potential safety hazard.
Disclosure of Invention
Aiming at the problem that wiring of a thermocouple sensor and a thermal resistance sensor is easy to connect wrongly, the utility model aims to provide a temperature sensor which comprises a probe, wherein the probe comprises a shell and a combined sensor, and the combined sensor comprises a thermal resistance and a thermocouple. The utility model comprises a thermocouple and a thermal resistor at the same time, can be used for application requiring two different inputs, and enlarges the application range; the same interface can be used for the thermocouple and the thermal resistor, and wiring is not easy to make mistakes, so that the accuracy and the stability of installation can be improved; the condition of adverse effect on the thermocouple in the utility model can not affect the thermal resistance, and the condition of adverse effect on the thermal resistance can not affect the thermocouple, so that the combined sensor is equivalent to the provision of a standby sensor in the same probe, can be selected according to actual conditions, expands the application range of the combined sensor and relatively reduces the cost.
The utility model aims to provide a temperature sensor, which comprises a probe, wherein the probe is used for measuring temperature, the probe comprises a shell and a combined sensor, the shell is used for protecting the combined sensor, the combined sensor is positioned inside the shell, and the combined sensor comprises a thermal resistor and a thermocouple, and the thermal resistor is connected with the thermocouple.
In some embodiments, the thermal resistor is an embedded structure, where the embedded structure may be understood that radial projections of the first lead and the second lead overlap with radial projections of the thermal resistor, and the embedded structure may enhance an anti-seismic effect of the thermal resistor, reduce an influence of vibration on the thermal resistor, and prolong a service life of the thermal resistor.
In some embodiments, the thermal resistor is an external structure, where the external structure may be understood that the radial projections of the first lead and the second lead do not overlap with the radial projection of the thermal resistor, and the external structure is convenient for connection and maintenance.
In some embodiments, the thermal resistor is a Pt100 resistive element.
In some embodiments, the thermal resistor is a Pt10 resistive element.
In some embodiments, the thermal resistor is a Pt1000 resistor element.
In some embodiments, the thermal resistance is a Cu50 resistive element.
In some embodiments, the thermal resistor is a Cu100 resistive element.
The thermocouple is connected with a first lead and a second lead.
In some embodiments, the positive and negative electrodes of the first thermocouple share a first lead, and the first lead is connected with a thermal resistor.
In some embodiments, the positive and negative electrodes of the second thermocouple share a second lead, and the second lead is connected with a thermal resistor.
In some embodiments, the first and second leads are connected to the same end of the thermal resistor.
The outer shell is sleeved outside the first lead and the second lead.
In some embodiments, the housing is one-piece, the one-piece housing is easier to machine, stronger, and also more leak-proof than a welded housing, thereby better protecting the probe, protecting the temperature sensor, and reducing costs relatively.
In some embodiments, the housing is a split structure.
In some embodiments, the shell is provided with a welding point, the shell is connected into a whole in a welding mode, the welding processing cost is low, and the welding can also be used for connecting different kinds of metals.
The probe is provided with a filling.
In some embodiments, the rest of the gaps in the shell are filled with insulating materials, so that an anti-vibration effect is achieved, the thermal resistor is protected, the service life of the thermal resistor is relatively prolonged, and meanwhile electricity safety of a user is guaranteed to a certain extent.
In some embodiments, the rest of the gaps in the shell are filled with magnesium oxide, and the magnesium oxide has high fire-resistant insulating property, can play a better insulating role, and ensures the electricity safety of the utility model.
The probe is externally connected with other sensor components, the other sensor components can be other components of the thermocouple sensor or other components of the thermal resistance sensor, the two other sensor components can be selected, the universality is strong, and the application range of the sensor is enlarged.
In some embodiments, the probe circumscribes other components of the thermocouple sensor, at which point the present utility model may be used as a thermocouple sensor.
In some embodiments, the probe is externally connected with other components of the thermal resistance sensor, and the utility model can be used as the thermal resistance sensor.
The utility model has the technical effects and advantages that:
1. the utility model comprises the thermocouple and the thermal resistor at the same time, can be used for application requiring two different inputs, expands the application range of the utility model and has stronger universality.
2. The condition of adverse effect on the thermocouple in the utility model can not affect the thermal resistance, and the condition of adverse effect on the thermal resistance can not affect the thermocouple, so that the combined sensor is equivalent to the provision of a standby sensor in the same probe, can be selected according to actual conditions, expands the application range of the combined sensor and relatively reduces the cost.
3. The thermal resistor adopts an embedded structure, so that the anti-seismic effect of the thermal resistor is enhanced, and the service life of the thermal resistor is prolonged, thereby prolonging the service life of the thermal resistor and relatively reducing the cost.
4. The utility model has the advantages of Chinese structure, easy processing, stronger strength and better sealing property, thereby better protecting the probe and the temperature sensor, relatively prolonging the service life of the utility model and relatively reducing the cost.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a temperature sensor of the present application;
FIG. 2 is a schematic view of another overall structure of the temperature sensor of the present application;
fig. 3 is a schematic diagram of the working principle of the temperature sensor of the present application.
In the figure:
1. a housing;
2. thermal resistance;
3. a thermocouple; 3.1, a first thermocouple; 3.2, a second thermocouple;
4. a first lead;
5. a second lead;
6. and (5) welding points.
Detailed Description
The utility model will be described in further detail with reference to the drawings and the detailed description. The embodiments of the utility model have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the utility model in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, and to enable others of ordinary skill in the art to understand the utility model for various embodiments with various modifications as are suited to the particular use contemplated.
Example 1
Referring to fig. 1 to 3 (the azimuth or positional relationship indicated in the present embodiment is based on the azimuth or positional relationship shown in fig. 1), in the present embodiment, a temperature sensor is provided, which includes a probe, the probe includes a housing 1 and a combination sensor, the combination sensor is located inside the housing 1, the combination sensor includes a thermal resistor 2 and a thermocouple 3, the upper end of the thermocouple 3 is a first thermocouple 3.1, the lower end is a second thermocouple 3.2, the thermocouple 3 is connected with a first lead 4 and a second lead 5, the right end of the first thermocouple 3.1 includes the positive electrode and the negative electrode of the first thermocouple 3.1, the positive electrode and the negative electrode of the first thermocouple 3.1 share the first lead 4 (the common reference herein means that the positive electrode and the negative electrode of the first thermocouple 3.1 are connected together and then connected with the upper end of the first lead 4), the lower end of the first lead 4 is connected with the right end of the thermal resistor 2, the right end of the thermal resistor 2 is further connected to a second lead 5 (specifically, the right end of the thermal resistor 2 is connected to the upper end of the second lead 5), the second lead 5 is below the first lead 4, the second lead 5 is connected to the second thermocouple 3.2 (specifically, the lower end of the second lead 5 is connected to the right end of the second thermocouple 3.2), the right end of the second thermocouple 3.2 includes a positive electrode and a negative electrode of the second thermocouple 3.2, the positive electrode and the negative electrode of the second thermocouple 3.2 are simultaneously connected to the second lead 5 (here, the positive electrode and the negative electrode of the second thermocouple 3.2 are simultaneously connected together and then are further connected to the lower end of the second lead 5), the thermal resistor 2 is a Pt100 resistor element, the thermal resistor 2 is in a buried structure (the buried structure herein can be understood that the radial projections of the first lead 4 and the second lead 5 overlap with the radial projection of the resistor 2), the thermal resistor 2 is located between the first thermocouple 3.1 and the second thermocouple 3.2, one end (one end refers to the right end of the thermal resistor 2) of the thermal resistor 2, which is connected with the first lead 4 and the second lead 5, is close to the right end of the housing 1 (the thermal resistor 2 is designed into an embedded structure, so that the shock resistance of the thermal resistor 2 can be enhanced, the service life of the thermal resistor 2 is prolonged), the housing 1 is of an integrated structure (compared with welding, the integrated structure is easier to process, stronger in strength, better in sealing performance, and better in protecting a probe and protecting the temperature sensor, the service life of the utility model is relatively prolonged, the cost is relatively reduced), and the rest of gaps in the housing 1 are filled with insulating materials (so that the shock resistance effect is also achieved, the service life of the thermal resistor 2 is prolonged, meanwhile, the electrical safety of a user is guaranteed to a certain extent, the insulating materials can be magnesium oxide, and the magnesium oxide has high fire resistance and insulating performance, and better insulation effects are guaranteed for the electrical safety of the utility model.
Example 2
Referring to fig. 1 to 3 (the azimuth or positional relationship indicated in the present embodiment is based on the azimuth or positional relationship shown in fig. 1), in the present embodiment, the thermal resistor 2 has an external structure (the external structure herein can be understood that the radial projections of the first lead 4 and the second lead 5 do not overlap with the radial projection of the thermal resistor 2, the external structure is convenient for connection and maintenance), the casing 1 has a split structure, the casing 1 is provided with a welding point 6, the casing 1 is connected into a whole by welding (the welding processing cost is low, and the welding can also connect different kinds of metals), and the rest of the structure is the same as that of the embodiment 1.
Example 3
In this embodiment, when the left end of the probe is connected to other components of the thermocouple sensor, the thermocouple sensor is formed according to the utility model, and the current has four selection modes: firstly, the positive electrode of the input end 3.1 flows to the negative electrode of the input end 3.1; secondly, the anode of the output end 3.2 flows to the cathode of the output end 3.2; thirdly, flowing from the positive electrode of the input end 3.1 to the negative electrode of the output end 3.2; fourth, from the positive pole of the output end 3.2 to the negative pole of the input end 3.1; the rest of the structure is the same as in example 1.
Example 4
In this embodiment, when the left end of the probe is connected to other components of the thermal resistance sensor, the thermal resistance sensor is formed according to the present utility model, and at this time, the current has two selection modes: firstly, the anode of the input end 3.1 flows to the cathode of the output end 3.2 through the first lead 4, the thermal resistor 2 and the second lead 5 in sequence; secondly, the anode of the output end 3.2 flows to the cathode of the input end 3.1 through the second lead 5, the thermal resistor 2 and the first lead 4 in sequence; the rest of the structure is the same as in example 1.
In the description of the present utility model, it should be understood that the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, and is merely for convenience in describing the present utility model and simplifying the description, and does not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art and which are included in the embodiments of the present utility model without the inventive step, are intended to be within the scope of the present utility model. Structures, devices and methods of operation not specifically described and illustrated herein, unless otherwise indicated and limited, are implemented according to conventional means in the art.
Claims (8)
1. A temperature sensor, comprising: the probe is used for measuring temperature, the probe includes shell (1) and combination sensor, shell (1) is used for protecting the combination sensor, the combination sensor is located the inside of shell (1), the combination sensor includes thermal resistor (2) and thermocouple (3), thermocouple (3) include first thermocouple (3.1) and second thermocouple (3.2), thermal resistor (2) are connected with first thermocouple (3.1) and second thermocouple (3.2) respectively.
2. A temperature sensor according to claim 1, characterized in that the thermal resistor (2) is of a buried structure.
3. A temperature sensor according to claim 1, characterized in that the thermocouple (3) is connected with a first lead (4) and a second lead (5).
4. A temperature sensor according to claim 3, characterized in that the positive and negative electrodes of the first thermocouple (3.1) share a first lead (4), and that the first lead (4) is connected to a thermal resistor (2).
5. A temperature sensor according to claim 3, characterized in that the anode and cathode of the second thermocouple (3.2) share a second lead (5), and that the second lead (5) is connected to a thermal resistor (2).
6. A temperature sensor according to claim 3, characterized in that the first lead (4) and the second lead (5) are connected to the same end of the thermal resistor (2).
7. A temperature sensor according to claim 1, characterized in that the thermal resistor (2) is a Pt100 resistor element.
8. A temperature sensor according to claim 1, characterized in that the housing (1) is one-piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321888101.8U CN220288822U (en) | 2023-07-18 | 2023-07-18 | Temperature sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321888101.8U CN220288822U (en) | 2023-07-18 | 2023-07-18 | Temperature sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220288822U true CN220288822U (en) | 2024-01-02 |
Family
ID=89339920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321888101.8U Active CN220288822U (en) | 2023-07-18 | 2023-07-18 | Temperature sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220288822U (en) |
-
2023
- 2023-07-18 CN CN202321888101.8U patent/CN220288822U/en active Active
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