CN205642658U - Temperature detection device - Google Patents
Temperature detection device Download PDFInfo
- Publication number
- CN205642658U CN205642658U CN201620300870.5U CN201620300870U CN205642658U CN 205642658 U CN205642658 U CN 205642658U CN 201620300870 U CN201620300870 U CN 201620300870U CN 205642658 U CN205642658 U CN 205642658U
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- Prior art keywords
- temperature
- current
- liquid storage
- storage hole
- converting member
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Abstract
The utility model discloses a temperature detection device, it has: temperature sensing parts, these temperature sensing parts are used for inside and turn into gained heat and conducting the parts to piezoelectric transduction behind the corresponding pressure to the temperature sensing parts the heat conduction of determinand, the piezoelectric transduction part, this piezoelectric transduction part is connected the temperature sensing part, be used for with send the unit to current detection behind the current signal of pressure convert for the correspondence of temperature sensing part conduction, the current detection unit, this current detection unit connection the piezoelectric transduction part for measure and show the current signal. The utility model discloses the real -time measurement and the demonstration of material temperature be can realize, temperature measurement's the degree of accuracy, sensitivity and portable degree have effectively been improved, and the low price, the temperature measurement under specially adapted high sensitivity, low temperature wide range and the adverse circumstances uses.
Description
Technical field
This utility model belongs to and relates to field of temperature measurement, particularly relates to a kind of novel temperature detection
Device.
Background technology
Temperature is an important state parameter of material, and it is measured for daily life, commercial production
And the every field such as scientific research suffers from highly important meaning, therefore, temperature measuring equipment and method
Widely being paid close attention to by people, its application the most extend to ship from life and general industry production field the most always
The extraordinary application of the circumstance complications such as oceangoing ship and ocean engineering, Aero-Space, oil, chemical industry.
The method being presently used for measuring temperature mainly has following several form:
1) expansion type: the method is that the principle of expanding with heat and contracting with cold utilizing material is i.e. according to object volume or geometric deformation
Temperature survey is carried out with the relation of temperature；Wherein typical expansion type temperature-detecting device, such as thermal expansion and cooling shrinkage type
Thermometer includes glass liquid thermometer, bimetallic expansion thermometer and pressure-type thermometer etc.；Its advantage
For simple in construction, cheap, can direct reading, easy to use, Non-Electricity Measurement mode, it is adaptable to anti-
Quick-fried occasion；Shortcoming is that accuracy ratio is relatively low, is difficult to realize automatization, and is easily damaged.
2) thermistor-type: the method is to utilize critesistor resistance to vary with temperature big resistance can be caused to change
Become and carry out temperature survey.Its advantage is that principle is simple, and production cost is low, obtains the most universal on boats and ships
Application.But its shortcoming is the most shaky, big electric current can cause self-heating, causes self-heating error；Additionally, such as
Really critesistor is exposed to height and hankers, and will cause permanent damage.
3) thermojunction type: the method is to utilize " pyroelectric effect ": one loop of two kinds of different conductors compositions,
Connecting the temperature difference at two nodes and will cause producing in loop an electromotive force, the direction of this electromotive force is with big
The temperature of little material with conductor and two contacts is relevant；Its shortcoming is that sensitivity is low, very sensitive to polluting,
Expensive.
4) infrared type: in nature, when the temperature of object is higher than absolute zero, due to its internal heat fortune
Dynamic existence, will the most just contain wave band be positioned at 0.75～100 μm constantly to surrounding radiated electromagnetic wave
Infrared ray, infrared temperature sensor utilizes this principle to be made；The method is contactless
Thermometric, but its accuracy is the highest, is easily disturbed by environmental factors.
5) photo-electric: the method is by contact measurand, heat radiation variations in temperature caused or other light
The signal of telecommunication is drawn, and detects this signal by electrooptical device, thus obtains temperature-measuring results.This method is not
As electricity quantity type measuring method is easily subject to the interference of electromagnetism, temperature survey can be carried out under electromagnetic environment；Lack
Point is the temperature that can disturb measurand, brings some errors that contact temperature-measuring method causes.
In sum, temperature measuring equipment and the thermometry thereof of application at present all has certain limitation
Property, it is impossible to well it is applicable to the temperature survey demand under high sensitivity, low temperature wide range and adverse circumstances.
Summary of the invention
The defect existed in view of prior art, the purpose of this utility model is to provide for a kind of novel temperature inspection
Survey device, this device is effectively increased thermometric accuracy, sensitivity, its be applicable to high sensitivity,
Temperature survey under low temperature wide range and adverse circumstances uses.
To achieve these goals, the technical solution of the utility model:
A kind of temperature-detecting device, it is characterised in that:
Have
Temperature sensing part, this temperature sensing part is for conducting the heat of determinand internal to temperature sensing part and will be obtained
Converting heat be to conduct to piezoelectricity converting member after corresponding pressure；
Piezoelectricity converting member, this piezoelectricity converting member connects described temperature sensing part, for by described temperature sensing part
The pressure of conduction sends to current detecting unit after being converted into corresponding current signal；
Current detecting unit, this current detecting unit connects described piezoelectricity converting member, is used for measuring and showing
Described current signal.
Further, described temperature sensing part has:
For carrying out the temperature-sensing probe of heat conduction with determinand, and it is filled with cold-producing medium inside this temperature-sensing probe；
One end connects described temperature-sensing probe, and the other end connects the pressure transmission pipe of described piezoelectricity converting member；
When described temperature-sensing probe contact measured thing carries out heat conduction, the cold-producing medium filled inside temperature-sensing probe steams
Send out produce gaseous refrigerant via described pressure transmission pipe by each self-corresponding pressure conduction to piezoelectricity converter section
Part, and the cold-producing medium that inside fills can carry out steaming in various degree because of the temperature difference that current determinand is measured
Send out.
Preferably, described temperature-sensing probe, pressure transmission pipe select copper material, and refrigeration selected by described cold-producing medium
Agent R-134a.
Further, described piezoelectricity converting member is micro-fluidic chip, and it has:
Egative film and the lucite chip being carved with microchannel being integrated with described egative film sealing-in, it includes
Two ends are led to the master that described current detecting unit constitutes measure loop by liquid storage hole A, liquid storage hole B respectively
Road；
And the sense channel being connected with described pressure transmission pipe by liquid storage hole C, and described sense channel and
Described main channel is vertically connected and leads in described main channel middle position, is used for carrying out current signal inspection to constitute
The detection region surveyed；
Wherein, fluid, liquid storage hole A, liquid storage hole B, main channel and detection it are filled with in described sense channel
PBS solution all it is filled with in region.
Preferably, described liquid storage hole C is connected by nipple with described pressure transmission pipe, and described screw thread connects
Head includes:
For the connecting portion threadeded with described pressure transmission pipe；
And the pedestal being connected with described liquid storage hole C interference fit.
Further, described current detecting unit has:
It is connected with described liquid storage hole A, for providing the DC source of loop voltage for measure loop；
It is connected with described liquid storage hole B, is used for measuring and showing the current detecting of the current value in current detection loop
Element；
And the variable resistor element being connected with described DC source, current measuring element respectively.
Preferably, described current measuring element uses pico-ampere table.
Compared with prior art, the beneficial effects of the utility model:
This utility model is capable of measuring in real time and display of mass temperature, is effectively increased thermometric
Accuracy, sensitivity and portable degree；And cheap, it is particularly well-suited to high sensitivity, low temperature wide range
Use with the temperature survey under adverse circumstances.
Accompanying drawing explanation
Fig. 1 is the structural representation of temperature-detecting device described in the utility model；
Fig. 2 is the temperature sensing part structural representation of temperature-detecting device described in the utility model；
Fig. 3 is the piezoelectricity converting member structural representation of temperature-detecting device described in the utility model；
Fig. 4 is the screw-thread joint structure schematic diagram of temperature-detecting device described in the utility model.
In figure: 1, temperature sensing part, 11, temperature-sensing probe, 12, pressure transmission pipe, 13, cold-producing medium, 2,
Piezoelectricity converting member, 21, main channel, 22, detection region, 23, sense channel, 24, connecting portion, 25,
Pedestal, 3, current detecting unit.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing,
This utility model is further elaborated.
As it is shown in figure 1, a kind of temperature-detecting device, its have temperature sensing part 1, piezoelectricity converting member 2 and
Current detecting unit 3；
Temperature sensing part 1 is for conducting the heat of determinand internal to temperature sensing part and being turned by the heat obtained
Conduct to piezoelectricity converting member 2 after turning to the pressure of correspondence；
Piezoelectricity converting member 2 connects described temperature sensing part 1, converts for the pressure described temperature sensing part conducted
For corresponding current signal and send to current detecting unit 3；
Current detecting unit 3 connects described piezoelectricity converting member 2, is used for measuring and show described current signal.
Further, such as Fig. 2, described temperature sensing part 1 has:
For carrying out the temperature-sensing probe 11 of heat conduction with determinand, and it is filled with refrigeration inside this temperature-sensing probe
Agent 13 (this cold-producing medium can carry out evaporation in various degree because of the temperature difference that current determinand is measured, thus
Making when the temperature difference of the material that this temperature-sensing probe detects, gaseous refrigerant is conducted to through pressure transmission pipe
The pressure of described piezoelectricity converting member sense channel is different), during described temperature-sensing probe contact measured thing, Liang Zhejin
Row heat conducts, and the cold-producing medium filled inside temperature-sensing probe is affected by the heat conducted is partially converted into gas
State cold-producing medium；The most preferably, described temperature-sensing probe uses hollow cylindrical structure；It should be noted that this
There is certain temperature detection range in device described in utility model, it is impossible to is applied to detect the material that temperature is too high.
And one end connects described temperature-sensing probe 11, the other end connects the pressure conduction of described piezoelectricity converting member
Pipe 12；
The gaseous refrigerant that cold-producing medium evaporation produces is conducted to piezoelectricity converting member by described pressure transmission pipe 12,
Connected piezoelectricity converting member is produced corresponding pressure.
Preferably, described temperature-sensing probe 11, pressure transmission pipe 12 select copper material, and described cold-producing medium is selected
Cold-producing medium R-134a.
Further, as it is shown on figure 3, described piezoelectricity converting member is micro-fluidic chip, it has:
Egative film and the lucite chip being carved with microchannel being integrated with described egative film sealing-in, it includes
Two ends are led to the master that described current detecting unit constitutes measure loop by liquid storage hole A, liquid storage hole B respectively
Road 21；And pass through the sense channel 23 that liquid storage hole C is connected with described pressure transmission pipe, and described detection is led to
Road 23 and described main channel 21 are vertically connected and lead in described main channel middle position, are used for carrying out to constitute
The detection region 22 of current signal detection；Connection main channel, the left and right sides, the most described detection region, downside then with
Sense channel connects, thus constitutes a "T"-shaped detection structure and three of this "T"-shaped detection structure
End points respectively be filled with the liquid storage hole A of PBS solution, the liquid storage hole B being filled with PBS solution and liquid storage hole
C connects；Also it is filled with PBS solution in main channel and detection region simultaneously；Then fill in described sense channel
Extend to liquid storage hole C, to ensure to accept the pressure of pressure transmission pipe conduction equipped with fluid and its interior fluid as far as possible
Power, when pressure is changed, produces impact to the fluid in sense channel and is i.e. conducted through when pressure transmission pipe
When the gaseous refrigerant pressure come acts on the fluid of sense channel, profit interface is moved, thus
Change the equivalent resistance in detection region, in the case of loop voltage is constant and then change loop current.
According to this principle, just can be in the hope of surveyed mass temperature size as long as measuring loop current size.
Owing to each passage in piezoelectricity converting member and detection zone domain sizes are all micron-sized, therefore in reality
Finding during testing, when the voltage of measure loop is 20V, detection region oil-water interfaces often move 1 μm,
Then corresponding loop current will change 0.11 μ A, it can be said that be effectively increased the sensitive of detection temperature
Degree.
Preferably, as shown in Figure 4, described liquid storage hole C is connected by nipple with described pressure transmission pipe,
Described nipple includes:
For the connecting portion 24 threadeded with described pressure transmission pipe；
And the pedestal 25 being connected with described liquid storage hole C interference fit.
Further, described current detecting unit 3 has:
It is connected with described liquid storage hole A, for providing the DC source of definite value loop voltage for measure loop；
It is connected with described liquid storage hole B, is used for measuring and showing the current detecting of the current value in current detection loop
Element；
And the variable resistance for protective loop being connected with described DC source, current measuring element respectively
Element.
Preferably, described current measuring element uses pico-ampere table.
Specific works process is: this utility model can be positioned over material surface or inside, with measurement of species
Temperature.
This utility model has a following two kinds duty:
One, when ambient temperature declines, the cold-producing medium evaporation capacity in the temperature-sensing probe of temperature sensing part reduces, from
And cause the gaseous refrigerant pressure through pressure transmission pipe conduction to decline, and then cause detecting profit boundary, region
Being moved towards sense channel side, therefore the detection region equivalent resistance in piezoelectricity converting member reduces,
After in the case of measure loop voltage is constant, cause measure loop electric current to increase；Can be entered by pico-ampere table
The temperature detection of row correspondence and display.
Two, when ambient temperature raises, the cold-producing medium evaporation capacity in the temperature-sensing probe of temperature sensing part increases, from
And cause the gaseous refrigerant pressure through pressure transmission pipe conduction to increase, and then cause detecting profit boundary, region
Being moved towards detection area side, therefore the detection region equivalent resistance of piezoelectricity converting member increases, finally
In the case of measure loop voltage is constant, measure loop electric current is caused to reduce；Can be carried out by pico-ampere table
Corresponding temperature detection and display.
The above, only this utility model preferably detailed description of the invention, but protection model of the present utility model
Enclose and be not limited thereto, the technology model that any those familiar with the art discloses at this utility model
In enclosing, conceive in addition equivalent or change according to the technical solution of the utility model and utility model thereof, all
Should contain within protection domain of the present utility model.
Claims (7)
1. a temperature-detecting device, it is characterised in that: have
Temperature sensing part, this temperature sensing part is conducted to piezoelectricity converting member after being conducted to temperature sensing part by the heat of determinand and being corresponding pressure by the converting heat obtained；
Piezoelectricity converting member, this piezoelectricity converting member connects described temperature sensing part, sends to current detecting unit after the current signal that the pressure that described temperature sensing part is conducted is converted into correspondence；
Current detecting unit, this current detecting unit connects described piezoelectricity converting member, is used for measuring and show described current signal.
Temperature-detecting device the most according to claim 1, it is characterised in that:
Described temperature sensing part has:
For carrying out the temperature-sensing probe of heat conduction with determinand, and it is filled with cold-producing medium inside this temperature-sensing probe；
One end connects described temperature-sensing probe, and the other end connects the pressure transmission pipe of described piezoelectricity converting member.
Temperature-detecting device the most according to claim 2, it is characterised in that:
Described temperature-sensing probe and pressure transmission pipe select copper material, and cold-producing medium R-134a selected by described cold-producing medium.
Temperature-detecting device the most according to claim 2, it is characterised in that:
Described piezoelectricity converting member is micro-fluidic chip, and it has:
Egative film and the lucite chip being carved with microchannel being integrated with described egative film sealing-in, this lucite chip includes
Two ends are respectively by the main channel of liquid storage hole A, liquid storage hole B with described current detecting unit composition measure loop；
And pass through the sense channel that liquid storage hole C is connected with described pressure transmission pipe, and described sense channel is vertically connected with described main channel and leads in described main channel middle position, to constitute the detection region for carrying out current signal detection；
Wherein, it is filled with fluid in described sense channel, in liquid storage hole A, liquid storage hole B, main channel and detection region, is all filled with PBS solution.
Temperature-detecting device the most according to claim 4, it is characterised in that:
Described liquid storage hole C is connected by nipple with described pressure transmission pipe, and described nipple includes:
For the connecting portion threadeded with described pressure transmission pipe；
And the pedestal being connected with described liquid storage hole C interference fit.
Temperature-detecting device the most according to claim 4, it is characterised in that:
Described current detecting unit has:
It is connected with described liquid storage hole A, for providing the DC source of loop voltage for measure loop；
It is connected with described liquid storage hole B, is used for measuring and showing the current measuring element of the current value in current detection loop；
And the variable resistor element being connected with described DC source, current measuring element respectively.
Temperature-detecting device the most according to claim 6, it is characterised in that:
Described current measuring element uses pico-ampere table.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620300870.5U CN205642658U (en) | 2016-04-08 | 2016-04-08 | Temperature detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620300870.5U CN205642658U (en) | 2016-04-08 | 2016-04-08 | Temperature detection device |
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| Publication Number | Publication Date |
|---|---|
| CN205642658U true CN205642658U (en) | 2016-10-12 |
Family
ID=57064867
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620300870.5U Expired - Fee Related CN205642658U (en) | 2016-04-08 | 2016-04-08 | Temperature detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758540A (en) * | 2016-04-08 | 2016-07-13 | 大连海事大学 | Temperature detecting device and method |
-
2016
- 2016-04-08 CN CN201620300870.5U patent/CN205642658U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758540A (en) * | 2016-04-08 | 2016-07-13 | 大连海事大学 | Temperature detecting device and method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161012 Termination date: 20170408 |
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| CF01 | Termination of patent right due to non-payment of annual fee |