CN109632149A - A kind of binode heat flow transducer - Google Patents
A kind of binode heat flow transducer Download PDFInfo
- Publication number
- CN109632149A CN109632149A CN201811482353.4A CN201811482353A CN109632149A CN 109632149 A CN109632149 A CN 109632149A CN 201811482353 A CN201811482353 A CN 201811482353A CN 109632149 A CN109632149 A CN 109632149A
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- China
- Prior art keywords
- electrode
- node
- compensating wire
- external electrode
- binode
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K17/00—Measuring quantity of heat
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
Abstract
The invention discloses a kind of binode heat flow transducers, are column type sensor, including external electrode, insulating layer, interior electrode, compensating wire 1 and two compensating wires 2；External electrode is respectively prepared with the interior electrode by the two kinds of materials that can make up thermocouple, and interior electrode is cylinder, and dispatch from foreign news agency extremely lives the cylinder of interior electrode across insulating layer tight；In the tail end of sensor, grows and be welded with a compensating wire 2 on the interior electrode tip side wall of external electrode, compensating wire 1 and another compensating wire 2 are respectively welded on the side wall near outer electrode tip；Compensating wire 2 is identical as the material of interior electrode, and compensating wire 1 is identical as the material of external electrode；Node that interior electrode is connected to external electrode is formed with 1. on the top of sensor, 2. the junction of another compensating wire 2 and external electrode is formed as node.The configuration of the present invention is simple, temperature easy to use, can carrying out two nodes simultaneously measurement, can be used in wind tunnel test and flight test.
Description
Technical field
The present invention relates to a kind of binode heat flow transducers, belong to experiment fields of measurement.
Background technique
Model surface heat-flow measurement, and one are usually carried out using coaxial thermocouple in conventional wind tunnel test and flight test
As the coaxial thermocouple that uses be single node coaxial thermocouple (i.e. can only measurement model surface temperature), sensor is once occur
Damage, then the temperature information of measurement position is all lost, and risk is larger, in addition carries out hot-fluid survey using single node coaxial thermocouple
Amount can only obtain model surface temperature, and the information for measuring acquisition is less, brings to complex region model surface heat flux huge
It is difficult.
Summary of the invention
Present invention solves the technical problem that are as follows: a kind of binode heat flow transducer is provided, by the benefit for optimizing sensor
Repay conductor connections, select reasonable testing scheme, can simultaneously measurement model surface temperature and back temperature information, measurement
The information of acquisition is more abundant, in addition, can also be measured under normal circumstances if some position of sensor is damaged
A part of temperature information of position, reliability are higher.
Binode heat flow transducer of the invention is column type sensor comprising external electrode, insulating layer, interior electrode, compensation
Conducting wire 1 and two compensating wires 2；The external electrode is made with the interior electrode by the two kinds of materials that can make up thermocouple respectively
At the interior electrode is cylinder, and the dispatch from foreign news agency extremely states the cylinder of interior electrode across insulating layer tight residence；It is passing
The tail end of sensor grows and is welded with a compensating wire 2 in the end sidewalls of the interior electrode of the external electrode, described outer
Compensating wire 1 and another compensating wire 2 are respectively welded on side wall near electrode tip；The compensating wire 2 with it is described
The material of interior electrode is identical, and the compensating wire 1 is identical as the material of the external electrode；It is formed on the top of sensor described
1., the junction of another compensating wire 2 and the external electrode is formed as the node that interior electrode is connected to the external electrode
Node is 2..
It is preferred that three compensating wires can be combined into three Measurement channels, channel 1 be the compensating wire 1, node 1., one
The circuit of the connection of compensating wire 2 described in item；Channel 2 be compensating wire 1, node 2., returning of being connected to of another compensating wire 2
Road；Channel 3 be the compensating wire 2, a node 1., node 2., the circuit of another compensating wire.
It is preferred that the insulating layer is formed of an electrically insulating material, thickness is less than 20 μm.
It is preferred that on the top of the sensor, the end face of the interior electrode and the external electrode, the node 1. position
In on the end face of transducer tip.
It connect interior electrode to form node with external electrode it is preferred that 1. passing through polishing by the node, or is applied by the way that plating is conductive
Layer forms the connecting node of interior electrode and external electrode.
It is preferred that in sensor tail end 2. node is less than 2mm at a distance from the external electrode end.
It is preferred that the length that the interior electrode grows the external electrode is less than 5mm in sensor tail end.
It is preferred that the material of interior electrode and external electrode is determined by the type of thermocouple.
It is preferred that the sensor is installed on tested model in the top end face mode concordant with model wall surface, and save
For point 2. close to another side end face of model, distance is less than 1mm.
It is preferred that the external electrode and compensating wire 1 are nichrome material, the interior electrode and compensating wire 2 are cupro-nickel material
Material, the insulating layer are insulated paint, and the sensor outer diameter is 1.4mm, and the thickness of insulating layer is 10-20 μm, the interior electricity
Polar diameter is 0.9mm.
The advantages of the present invention over the prior art are that:
(1) this sensor can carry out the measurement of two node temperatures simultaneously, and the temperature information of acquisition is more abundant, can be heat
Stream identification provides temperature information more abundant；
(2) safety coefficient of this sensor is higher, obtains even if there is a node damage that can also measure in use
Obtain the temperature of another point.
Detailed description of the invention
Fig. 1 is sensor structure schematic diagram；
Fig. 2 is sensor fixing structure schematic diagram.
Specific embodiment
The invention will be described in further detail in the following with reference to the drawings and specific embodiments.
As shown in Figure 1, binode heat flow transducer of the invention is mainly by external electrode, insulating layer, interior electrode, compensating wire
1 and compensating wire 2 constitute.Wherein compensating wire 1 and the extremely same material of dispatch from foreign news agency, compensating wire 2 are same with interior electrode
Material.Compensating wire 1 has one, is denoted as a, is connected on the outside of the endpiece of external electrode；Compensating wire 2 has two, respectively b and
C, wherein compensating wire b is connected to interior electrode tail end, and compensating wire c is connected on the outside of external electrode endpiece.The sensor shares two
A measuring node, respectively node 1. with node 2., 1. node is located at transducer tip, be inner and outer electrodes connection
Place, internal and external electrode can form node by way of polishing, can also form connecting node by plating conductive coating；Node is 2.
It is the junction of compensating wire c and external electrode on the outside of external electrode endpiece, 2. node is less than at a distance from external electrode endpiece
2mm.The length of interior electrode is greater than the length of external electrode, and the length difference of the two is less than 5mm.As shown in Fig. 2, sensor is column,
It is installed in the mounting hole of model surface, it is firm to guarantee to connect between model and sensor, and it is seamless, it can be connected using screw thread
It connects, can also be bonded using glue.In sensor installation process, guarantee 2. node is less than at a distance from the model back side (inner wall)
Transducer tip is trimmed to concordant with wall surface by 1mm after sensor is fixed.By three conducting wires of sensor using appropriate
Mode is combined, and is formed two data test acquisition channels, is recorded the voltage value in two channels, then can be obtained by conversion
Two measuring nodes (node 1. with node 2.) the corresponding voltage value of temperature, changed by the phasing meter of corresponding thermocouples
It calculates, the temperature information of two measuring nodes can be obtained.Mould can be obtained through heat flux by model surface temperature and back temperature information
The heat flow density on type surface.
The binode heat flow transducer is widely applied in XX and YY flight test, used sensor
Type is E type, and sensor external electrode and compensating wire 1 are nichrome material, and interior electrode and compensating wire 2 are cupro-nickel material,
Insulating layer is insulated paint, and sensor outer diameter is 1.4mm, and thickness of insulating layer is 10-20 μm, and inner electrode diameter 0.9mm, node is 1.
To be polished the internal and external electrode tie point to be formed using coarse sandpaper, 2. node is the tie point formed using laser welding.It will compensation
Conducting wire b is measured as public cathode, compensating wire a and compensating wire c respectively as anode, the voltage value difference of acquisition
For Vab and Vcb (unit mv), cold junction compensation temperature is 26 DEG C, and corresponding voltage value is 1.556mv, then node 1. temperature pair
The voltage value answered is V1=Vab+1.556, and 2. the corresponding voltage value of temperature is V2=V1-Vcb to node.Pass through E type thermocouple
1. the phasing meter egress that can convert is respectively T1 and T2 with the temperature of node 2., T1 may be considered the temperature of model surface,
T2 is the temperature information at the model back side.It by model surface temperature T1 and back temperature T2, is recognized by Aerodynamic Heating, mould can be obtained
Type surface heat flux Q.
Claims (10)
- Be column type sensor 1. a kind of binode heat flow transducer, it is characterised in that: including external electrode, insulating layer, interior electrode, Compensating wire 1 and two compensating wires 2；The external electrode and the interior electrode are distinguished by the two kinds of materials that can make up thermocouple It is made, the interior electrode is cylinder, and the dispatch from foreign news agency extremely states the cylinder of interior electrode across insulating layer tight residence；? The tail end of sensor grows and is welded with a compensating wire 2 on the interior electrode tip side wall of the external electrode, described outer Compensating wire 1 and another compensating wire 2 are respectively welded on side wall near electrode tip；The compensating wire 2 with it is described The material of interior electrode is identical, and the compensating wire 1 is identical as the material of the external electrode；It is formed on the top of sensor described 1., the junction of another compensating wire 2 and the external electrode is formed as the node that interior electrode is connected to the external electrode Node is 2..
- 2. a kind of binode heat flow transducer according to claim 1, it is characterised in that: three compensating wires are combined into three Measurement channel, channel 1 be the compensating wire 1, node 1., the circuit that is connected to of a compensating wire 2；Channel 2 is to mend Repay conducting wire 1, node 2., the circuit that is connected to of another compensating wire 2；Channel 3 be the compensating wire 2, a node 1., Node 2., the circuit of another compensating wire.
- 3. a kind of binode heat flow transducer according to claim 1, it is characterised in that: the insulating layer is by electrical isolation material Material is made, and thickness is less than 20 μm.
- 4. a kind of binode heat flow transducer according to claim 1, it is characterised in that: on the top of the sensor, 1. the end face of the interior electrode and the external electrode, the node are located on the end face of transducer tip.
- 5. a kind of binode heat flow transducer according to claim 4, it is characterised in that: 1. the node passes through polishing will Interior electrode connect to form node with external electrode, or the connecting node of interior electrode and external electrode is formed by plating conductive coating.
- 6. a kind of binode heat flow transducer according to claim 1, it is characterised in that: in sensor tail end, node is 2. With at a distance from the external electrode end be less than 2mm.
- 7. a kind of binode heat flow transducer according to claim 1, it is characterised in that: described interior in sensor tail end The length that electrode grows the external electrode is less than 5mm.
- 8. a kind of binode heat flow transducer according to claim 1, it is characterised in that: the material of interior electrode and external electrode It is determined by the type of thermocouple.
- 9. a kind of binode heat flow transducer according to claim 1, it is characterised in that: the sensor is with top end face The mode concordant with model wall surface is installed on tested model, and node is 2. close to another side end face of model, apart from small In 1mm.
- 10. a kind of binode heat flow transducer described according to claim 1~any one of 9, it is characterised in that: the dispatch from foreign news agency Pole and compensating wire 1 are nichrome material, and the interior electrode and compensating wire 2 are cupro-nickel material, and the insulating layer is insulation Paint, the sensor outer diameter are 1.4mm, and the thickness of insulating layer is 10-20 μm, and the inner electrode diameter is 0.9mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811482353.4A CN109632149B (en) | 2018-12-05 | 2018-12-05 | Double-node heat flow sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811482353.4A CN109632149B (en) | 2018-12-05 | 2018-12-05 | Double-node heat flow sensor |
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| Publication Number | Publication Date |
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| CN109632149A true CN109632149A (en) | 2019-04-16 |
| CN109632149B CN109632149B (en) | 2021-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811482353.4A Active CN109632149B (en) | 2018-12-05 | 2018-12-05 | Double-node heat flow sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112338110A (en) * | 2020-12-04 | 2021-02-09 | 中国科学院力学研究所 | High-sensitivity integrated construction method for thermocouple transient heat flow sensor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2171109Y (en) * | 1993-06-12 | 1994-07-06 | 长沙工业高等专科学校 | Temp. measuring device with three-core plug |
| US6203191B1 (en) * | 1998-10-28 | 2001-03-20 | Speculative Incorporated | Method of junction temperature determination and control utilizing heat flow |
| CN101403638A (en) * | 2008-11-21 | 2009-04-08 | 北京航天计量测试技术研究所 | Heat flow sensor with temperature compensation function |
| CN103217233A (en) * | 2013-03-29 | 2013-07-24 | 北京遥测技术研究所 | Phase-change heat accumulation type heat flow sensor |
-
2018
- 2018-12-05 CN CN201811482353.4A patent/CN109632149B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2171109Y (en) * | 1993-06-12 | 1994-07-06 | 长沙工业高等专科学校 | Temp. measuring device with three-core plug |
| US6203191B1 (en) * | 1998-10-28 | 2001-03-20 | Speculative Incorporated | Method of junction temperature determination and control utilizing heat flow |
| CN101403638A (en) * | 2008-11-21 | 2009-04-08 | 北京航天计量测试技术研究所 | Heat flow sensor with temperature compensation function |
| CN103217233A (en) * | 2013-03-29 | 2013-07-24 | 北京遥测技术研究所 | Phase-change heat accumulation type heat flow sensor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112338110A (en) * | 2020-12-04 | 2021-02-09 | 中国科学院力学研究所 | High-sensitivity integrated construction method for thermocouple transient heat flow sensor |
| CN112338110B (en) * | 2020-12-04 | 2021-12-24 | 中国科学院力学研究所 | High-sensitivity integrated construction method for thermocouple transient heat flow sensor |
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| CN109632149B (en) | 2021-06-11 |
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