CN201335842Y - Direction selective thermal balance flow velocity sensor - Google Patents
Direction selective thermal balance flow velocity sensor Download PDFInfo
- Publication number
- CN201335842Y CN201335842Y CNU2008201536660U CN200820153666U CN201335842Y CN 201335842 Y CN201335842 Y CN 201335842Y CN U2008201536660 U CNU2008201536660 U CN U2008201536660U CN 200820153666 U CN200820153666 U CN 200820153666U CN 201335842 Y CN201335842 Y CN 201335842Y
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- fluid
- heater
- contact
- heated
- thermal
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Abstract
The utility model relates to a thermal balance flow velocity sensor. The direction selective thermal balance flow velocity sensor comprises a heater, a fluid contact surface, a temperature sensor, a heat insulation sleeve and a detection circuit board; wherein, the heater is composed of a heating wire and a heated copper body; the temperature sensor is arranged in the cavity of the heated copper body close to the fluid contact surface; the heater is arranged in and parallel to the heat insulation sleeve and the heater is in certain distance with the left end of the heat insulation sleeve; the fluid contact surface is arranged on the left end of the heater vertical to the heater; the detection circuit board is connected with the temperature sensor. The sensor provided by the utility model can directionally measure the flow velocity of fluid and is mounted between the heat insulation sleeve and the fluid contact surface in parallel with a special distance. The direction selective thermal balance flow velocity sensor is widely applicable to wind power generation, meteorology and automobile, aircraft, aerodynamics, thermal measurement and hydromechanics fields.
Description
Technical field
The utility model relates to a kind of thermal equilibrium flow sensor, is used for flow rate of fluid signals such as measurement gas, liquid.
Background technology
At present, flow speed measurement sensor is a lot, but does not all have directional selectivity, and promptly any direction can be measured.Therefore need a kind of directional selectivity that has, promptly only measure the flow velocity of specific direction, this makes this kind sensor that many special usages be arranged, the multiple new flow sensor of one-tenth capable of being combined.Can be widely used in fields such as wind-power electricity generation, meteorology, automobile, aircraft, aerodynamics, thermal measurement, fluid mechanics.
The utility model content
The purpose of this utility model provides a kind of directional selectivity thermal equilibrium flow sensor, and the flow rate information that is used for the specific direction of fluids such as measurement gas, liquid is measured.
For achieving the above object, the concrete technical scheme taked of the utility model is as follows:
A kind of directional selectivity thermal equilibrium flow sensor comprises:
A well heater of forming by the heater strip and the copper body that is heated, heater strip is for the copper body that is heated provides heat, and the copper body that is heated is used for store heat;
A fluid surface of contact contacts with fluid;
A temperature sensor is located in the copper body cavity body that is heated, and near the fluid surface of contact, is used for test fluid surface of contact heat flux;
A thermal sleeve, well heater are set in parallel in the thermal sleeve and are recessed in thermal sleeve left port certain distance; It is vertical with well heater that the fluid surface of contact is located at the well heater left end, and the fluid that enters from the thermal sleeve left port is contacted with the fluid surface of contact;
A testing circuit plate is connected with temperature sensor, converts the relation of detected rate of flow of fluid of fluid surface of contact and heat to current signal;
A thermofin 7 is isolated well heater 1 and circuit board 5.
Above-mentioned thermal sleeve is used to install well heater, fluid surface of contact etc., and keeps heat not run off, and makes fluid in a direction simultaneously, and promptly left port enters with the fluid surface of contact and contacts.
It is bright that above-mentioned well heater, heater strip are wound in the copper body surface that is heated, and the copper body that is heated is the right cylinder of hollow.
The fluid surface of contact contacts with fluid, flow rate of fluid and the heat of fluid removal fluid surface of contact proportional, the temperature level and the rate of flow of fluid of fluid surface of contact are proportional.Thermal resistance or thermopair are connected with the testing circuit plate, can convert the relation of detected rate of flow of fluid of fluid detection face and heat to current signal.
The utility model beneficial effect: the directional selectivity thermal equilibrium flow sensor that the utility model provides can be widely used in fields such as wind-power electricity generation, meteorology, automobile, aircraft, aerodynamics, thermal measurement, fluid mechanics.This directional selectivity thermal equilibrium flow sensor has directivity ground to measure rate of flow of fluid, directional selectivity is by parallel installation between thermal sleeve and the fluid surface of contact, and maintains particular distance realization.Temperature by the test fluid surface of contact is measured rate of flow of fluid.This flow sensor can be used for folk prescription to fluid-velocity survey, can also expand the fluid-velocity survey that is used to form 2-6 direction, constitutes the multiple degrees of freedom flow sensor.
Description of drawings
Fig. 1 is the utility model directional selectivity thermal equilibrium flow sensor structural representation.
Fig. 2 is the utility model directional selectivity thermal equilibrium flow sensor heater structure synoptic diagram.
Fig. 3 is the utility model directional selectivity thermal equilibrium flow sensor thermal sleeve structural representation.
Fig. 4 is the utility model directional selectivity thermal equilibrium flow sensor circuit theory diagrams.
Embodiment
Further specify the utility model below in conjunction with accompanying drawing and preferred embodiment.
As shown in Figure 1, directional selectivity thermal equilibrium flow sensor described in the utility model comprises a well heater 1 of being made up of the heater strip 11 and the copper body 12 that is heated, and heater strip is for the copper body that is heated provides heat, and the copper body that is heated is used for store heat; A fluid surface of contact 3 contacts with fluid; A temperature sensor 6 is located in the copper body cavity body that is heated, and near fluid surface of contact 3, is used for test fluid surface of contact heat flux; A thermal sleeve 4, well heater 1 are set in parallel in the thermal sleeve 4 and are recessed in thermal sleeve left port certain distance; It is vertical with well heater that fluid surface of contact 3 is located at well heater 1 left end, and the fluid that enters from the thermal sleeve left port is contacted with the fluid surface of contact; A testing circuit plate 5 is connected with temperature sensor, converts the relation of detected rate of flow of fluid of fluid surface of contact and heat to current signal; A thermofin 7 is isolated well heater 1 and circuit board 5.
The well heater 1 that heater strip 11, the copper body 12 that is heated are formed is seal-installed in the thermal sleeve 4, parallel with thermal sleeve and distance is arranged with the left entry of thermal sleeve, make fluid to finish the heat interchange of fluid and well heater 1 with the fluid contact surfaces 3 of the direction IMPULSIVE HEATING device parallel with thermal sleeve.Temperature sensor 6 thermoelectricity occasionally thermal resistance are installed in the interior circular cylindrical cavity (and the copper body cavity body that is heated) of well heater, apart from fluid contact surfaces 3 1mm only, this temperature sensor thermoelectricity occasionally hot-fluid of the real-time test fluid surface of contact 3 of thermal resistance changes, the variable quantity of hot-fluid is directly related with rate of flow of fluid, is therefore set up the relation of temperature and flow velocity.Temperature signal is passed to circuit board 5, and temperature signal is transformed into current signal, and by anodal 51 outputs of the signal of circuit board, the positive source 52 of circuit board and circuit negative pole 53 external power supplys provide drive current to circuit.
As shown in Figure 2, arrow is depicted as the right view of well heater 1 among the embodiment of this directional selectivity thermal equilibrium flow sensor, and this well heater one-piece construction is a right cylinder, and its diameter is 5mm-20mm, and the cylinder two ends exceed about 1mm than shaft.Cylinder is 4mm-19mm with fine copper or stainless steel manufacturing, diameter, and length is 5mm-20mm.The mounting temperature sensor thermoelectricity occasionally cylindrical cavity diameter of thermal resistance is about 3mm.Heater strip 11 manganese-copper filament coiling, and add insulating varnish and fix.
As shown in Figure 3, arrow is depicted as the right view of thermal sleeve, and this thermal sleeve is a cylinder bodily form cavity, with thermal insulation material or plastics or metal material manufacturing, also can be that filling heat insulator is filled or vacuum interlayer in wall.The thermal sleeve diameter is greater than 4mm-19mm.Thermal sleeve right-hand member circular hole is used for by the power lead of well heater and the signal wire of temperature sensor.
As shown in Figure 4, the temperature sensor thermoelectricity occasionally signal S of thermal resistance enters operational amplifier F1 by resistance R 1, signal amplification factor is by resistance R 1 and resistance R 3 decisions, and resistance R 5, R6, operational amplifier F2, transistor K form a constant-current source circuit, and RL is a pull-up resistor.The given initial temperature value of potentiometer W, signal source S is exaggerated the input control of back as constant current source, and this signal is big more, and the constant current source output current is big more.This output current is used for the control heater electric current, therefore, sets up the thermal equilibrium of hot-fluid and rate of flow of fluid, and this balanced balanced current size has funtcional relationship with the flow velocity size.
The content that is not described in detail in this instructions belongs to this area professional and technical personnel's known prior art.
The directional selectivity thermal equilibrium flow sensor that the utility model patent provides can be widely used in fields such as wind-power electricity generation, meteorology, automobile, aircraft, aerodynamics, thermal measurement, fluid mechanics.The characteristics of this directional selectivity thermal equilibrium flow sensor are: have directivity ground to measure rate of flow of fluid, directional selectivity is by parallel installation between thermal sleeve and the fluid surface of contact, and maintains particular distance realization.Temperature by the test fluid surface of contact is measured rate of flow of fluid.This flow sensor can be used for folk prescription to fluid-velocity survey, can also expand the fluid-velocity survey that is used to form 2-6 direction, constitutes the multiple degrees of freedom flow sensor.
Claims (3)
1. a directional selectivity thermal equilibrium flow sensor is characterized in that, comprising:
A well heater of forming by the heater strip and the copper body that is heated, heater strip is for the copper body that is heated provides heat, and the copper body that is heated is used for store heat;
A fluid surface of contact contacts with fluid;
A temperature sensor is located in the copper body cavity body that is heated, and near the fluid surface of contact, is used for test fluid surface of contact heat flux;
A thermal sleeve, well heater are set in parallel in the thermal sleeve and are recessed in thermal sleeve left port certain distance; It is vertical with well heater that the fluid surface of contact is located at the well heater left end, and the fluid that enters from the thermal sleeve left port is contacted with the fluid surface of contact;
A testing circuit plate is connected with temperature sensor, converts the relation of detected rate of flow of fluid of fluid surface of contact and heat to current signal;
A thermofin (7) is isolated well heater (1) and circuit board (5).
2. directional selectivity thermal equilibrium flow sensor as claimed in claim 1 is characterized in that the heater strip of well heater is wound in the copper surface that is heated, and the copper body that is heated is the right cylinder of hollow.
3. directional selectivity thermal equilibrium flow sensor as claimed in claim 1 is characterized in that the thermal resistance of temperature sensor or thermopair are apart from fluid surface of contact 1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201536660U CN201335842Y (en) | 2008-09-27 | 2008-09-27 | Direction selective thermal balance flow velocity sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201536660U CN201335842Y (en) | 2008-09-27 | 2008-09-27 | Direction selective thermal balance flow velocity sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201335842Y true CN201335842Y (en) | 2009-10-28 |
Family
ID=41287497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201536660U Expired - Fee Related CN201335842Y (en) | 2008-09-27 | 2008-09-27 | Direction selective thermal balance flow velocity sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201335842Y (en) |
-
2008
- 2008-09-27 CN CNU2008201536660U patent/CN201335842Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091028 Termination date: 20100927 |