CN102384793A - Self-powered wireless temperature field measuring device in closed rotating shaft - Google Patents
Self-powered wireless temperature field measuring device in closed rotating shaft Download PDFInfo
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- CN102384793A CN102384793A CN2011103569171A CN201110356917A CN102384793A CN 102384793 A CN102384793 A CN 102384793A CN 2011103569171 A CN2011103569171 A CN 2011103569171A CN 201110356917 A CN201110356917 A CN 201110356917A CN 102384793 A CN102384793 A CN 102384793A
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Abstract
The invention discloses a self-powered wireless temperature field measuring device in a closed rotating shaft. The device comprises a hot end tightly attached to the inner surface of the closed rotating shaft, a cold end exposed in the air and connected with a radiator, a self-powered component arranged between the hot end and the cold end and consisting of a closed loop formed by connecting n semiconductor pairs in series, an infrared transmitter for transmitting infrared signals of fixed wavelength, an infrared receiving device provided with a reference temperature sensor and a calculation and output device. By adopting a micro structure design, the device can be conveniently arranged on the inner surface of a closed shaft series part; and measurement of the radial temperature field in the high-speed closed rotating shaft is realized by self-powered wireless transmission, a power supply for supplying energy is not needed, and the measuring device can work normally for a long term under an unattended environment by using heat energy.
Description
Technical field
The invention belongs to temperature wireless monitoring field, be specifically related to seal self-power wireless temperature field measuring apparatus in the turning axle.
Background technology
Axle is the vitals in the machinery, and its function is supporting rotational parts and transmitting movement and power; It is key that axle and parts on shaft are carried out part circumferentially fixing and transmitting torque; Bearing is used for bolster and parts on shaft, the friction and wear between the running accuracy of retainer shaft and minimizing axle and supporting, and these parts all belong to shafting components.These parts are periodic frictional heating in the process of rotation; Temperature constantly raises; Working environment to axle makes a big impact; Particularly as far as the high precision shafting components of long-term high-speed overload running, this fricative heat is one of main factor of influence axle performance (rigidity, precision, serviceable life).Typical example is like machine tool chief axis, generator shaft etc.So these shafting componentses being carried out the monitoring of real-time temperature field is very to be necessary, through monitoring the working condition that can judge shafting components, carries out the prevention of fault.
Because shafting components needs long-time high speed rotating, so install and measure device above that and realize that measurement reliably and with long-term has big difficulty.Method for the turning axle temperature detection has at present: 1, carry out the real-time collection of temperature through the temperature sensor that is installed on the rotary part, transmit temperature data out with the mode of wireless telecommunications through wireless radio frequency modules then.2, through the Non-contact Infrared Temperature Measurement probe rotary part is carried out contactless temperature and gather in real time, the temperature that collects is directly through the data line transmission.In the method 1; Because radio frequency communication need cause the supply module volume bigger than macro-energy, be difficult for installing; And under the high speed rotating state; Balance to main shaft has certain influence, and the installation of antenna is very huge to the influence of communication quality in wireless telecommunications, so also become one of problem that influences radio frequency communication widespread adoption in the shafting components temperature monitoring how fixing up an aerial wire on the shafting components.In the method 2; The infrared temperature probe measurement method that adopts; Be contactless measuring method relatively more commonly used, but can't record the internal temperature field distribution of sealing shafting components, and any object all can send the infrared ray of the different emittance of different wave length; The inner complex environment of sealing shafting components can influence each other between them, so can exert an influence to measuring accuracy.
In sum, designing a kind of suitable device realizes being very important for for a long time, accurately measuring of temperature field in the high speed rotating sealing axle.
Summary of the invention
The invention provides self-power wireless temperature field measuring apparatus in a kind of sealing turning axle, need not power supply power supplies such as battery, realized the permanently effective measurement in temperature field in the high speed rotating sealing axle.
Self-power wireless temperature field measuring apparatus in a kind of sealing turning axle; Comprise: the self energizing parts, be used to launch infrared transmitter, infrared receiving device and the calculating output unit of the infrared signal of fixed wave length, the reference temperature sensor that is used for the measuring basis temperature is installed on the said infrared receiving device; Said self energizing parts are electrically connected with infrared transmitter, are used to drive said infrared transmitter emission infrared signal; Said infrared receiving device is used to receive said infrared signal and its light intensity is detected; Said calculating output unit links to each other with said infrared receiving device, exports behind the temperature field information in the sagittal plane that is used to receive said intensity signal and reference temperature information and calculate the sealing turning axle;
Wherein, Said self energizing parts are made up of hot junction, cold junction and the closed-loop path that is located between said hot junction and the cold junction; Said hot junction is close on the interior turning axle surface of said sealing turning axle; Said cold junction is exposed in the air and is connected to heating radiator, and to being composed in series, said semiconductor constitutes N-type semiconductor and the P-type semiconductor by fluid-tight engagement by n semiconductor in said closed-loop path; Said infrared receiving device is installed on the sleeve lining.
In the optimized technical scheme; Described infrared receiving device is several; And the sleeve lining around the said infrared transmitter distributes a week, can receive corresponding signal and accurately obtain the temperature field information in the sagittal plane of sealing turning axle in any moment that turning axle does not stop to rotate like this.
In the said apparatus, said heating radiator is used for heat radiation, makes said cold junction temperature not receive the influence of the high temperature in said hot junction, keeps consistent with air themperature.
In the said apparatus, in the said closed-loop path, the N-type semiconductor of each semiconductor centering links to each other with the P-type semiconductor of adjacent semiconductor centering, and the P-type semiconductor of each semiconductor centering links to each other with the N-type semiconductor of another adjacent semiconductor centering.
The said apparatus principle is following:
When sealing turning axle when rotation, hot-side temperature rises, because lower at the thermal conductivity ratio of the closed environment air of axle sleeve, there is temperature difference greater than the temperature of cold junction in the temperature in hot junction in hot junction and cold junction.Based on pyroelectric effect, each semiconductor in the closed-loop path is claimed thermo-electromotive force again to producing the Seebeck electromotive force at the place, hot junction at this moment, and N-type semiconductor is the high potential end, and P-type semiconductor is the low potential end.Because each semiconductor is externally launched infrared signal to being connected in series so the electric potential difference that the closed-loop path produces enough drives infrared transmitter in the closed-loop path, and the infrared signal wavelength that infrared transmitter is outwards launched is fixed.Electrical specification according to this infrared transmitter can know that light intensity and Electromotive Difference Of Potential are directly proportional, because temperature difference increases, Electromotive Difference Of Potential just strengthens, so light intensity and temperature difference are directly proportional; Infrared receiving device receives said infrared signal and its light intensity is detected; Detected intensity signal and be input to the calculating output unit by the reference temperature information that the reference temperature sensor records calculates the temperature field information in the sagittal plane of sealing turning axle and exports immediately.Computing method are following:
If the temperature of hot junction and cold junction is respectively T
HAnd T
C, the temperature difference Δ T=T of hot junction and cold junction then
H-T
CCan get by the thermoelectric effect formula: locate in the hot junction; Each semiconductor centering N-type semiconductor and P-type semiconductor voltage difference are E '=α Δ T; The voltage that whole closed-loop path produced is E=nE '=n α Δ T, and wherein α is a Seebeck coefficient, and n is the right quantity of semiconductor in the closed-loop path.If the system's internal resistance that is made up of self energizing parts and infrared transmitter is R, when then supplying power to infrared transmitter through above-mentioned voltage, the electric current of infrared transmitter is I=E/R.Characteristic by infrared transmitter can be known, the light intensity I of infrared signal
o=β I, wherein β is the electric property parametric representation emission light intensity of infrared transmitter and the ratio of electric current.And in infrared receiving device, can record the light intensity I of IR wavelength that infrared transmitter sends
oSize, can obtain the temperature difference of hot junction and cold junction like this
If the distance of hot junction and cold junction is L, can get heat flow density
wherein k be the material thermal conductivity coefficient.Further, can calculate the distribution situation in the temperature field in the sagittal plane of sealing turning axle according to heat flow density.
If being installed in the reference temperature that the reference temperature sensor on the infrared receiving device records is T
B, be H from the hot junction to the distance of reference temperature sensor, so, with any temperature T of the plan of the axis normal of said sealing turning axle
xAll can obtain through computes:
Wherein, x is that any point on the plane with the axis normal of said sealing turning axle is to the distance in hot junction.That is to say, can be through the temperature field information in the sagittal plane of above calculating acquisition sealing turning axle.
The invention also discloses self-power wireless temperature field measurement method in a kind of sealing turning axle; Comprise: some groups of semiconductors that are utilized between hot junction and the cold junction produce electric energy to the thermoelectric effect that the closed-loop path produced that constitutes, and drive the infrared light emission pipe that fixed wave length is arranged; Again according to the send temperature difference that ultrared intensitometer is calculated cold junction and hot junction, and then calculate the temperature field in the sagittal plane of turning axle according to said temperature difference and reference temperature, thereby realize monitoring temperature field in the sealing turning axle.
Among the present invention, temperature signal is transferred to non-rotating end through the infrared radio transmission manner, and the electric energy that driving infrared and radio transmission system is carried out the signal wireless transmission is produced by the self-powered structure in apparatus of the present invention, does not need power supply power supplies such as battery.
Compared with prior art, the present invention has following beneficial technical effects:
The present invention adopts microstructure design, can be installed in the inside surface of the shafting components of sealing easily; And, realized sealing at a high speed the measurement of the radial temperature field of interior of rotating shaft through self-energizing wireless transmission, do not need the power supply energy supply, guarantee that measurement mechanism can utilize heat energy long-term operate as normal under unattended environment.
Description of drawings
Fig. 1 is the structural representation of self-power wireless temperature field measuring apparatus in the sealing turning axle of the present invention.
Fig. 2 is the enlarged drawing that circle is irised out part among Fig. 1.
Fig. 3 is the principle schematic that device shown in Figure 1 carries out temperature field measurement.
Embodiment
Specify the present invention below in conjunction with embodiment and accompanying drawing, but the present invention is not limited to this.
As shown in Figure 1, the self-power wireless temperature field measuring apparatus comprises in a kind of sealing turning axle: hot junction 2, cold junction 3, be located at closed-loop path, heating radiator 4, infrared transmitter 5, infrared receiving device 6 between hot junction 2 and the cold junction 3, be installed in the reference temperature sensor 11 on the infrared receiving device 6 and calculate the output unit (not shown in figure 1).
Hot junction 2 is close on interior turning axle 1 surface of sealing turning axle, and cold junction 3 is exposed in the air and is connected to heating radiator 4, so that heat radiation in time makes to keep the not influence of the high temperature of heating end 2 of its temperature consistent with air themperature.The closed-loop path by n semiconductor to being composed in series; Each semiconductor constitutes N-type semiconductor and the P-type semiconductor by fluid-tight engagement; The N-type semiconductor of each semiconductor centering links to each other with the P-type semiconductor of adjacent semiconductor centering, and the P-type semiconductor of each semiconductor centering links to each other with the N-type semiconductor of another adjacent semiconductor centering.As shown in Figure 2; In the closed-loop path; N-type semiconductor and P-type semiconductor are alternately arranged, and at cold junction 3 places, N-type semiconductor 7 is bonded together with P-type semiconductor 8 closely; The pin of 2 place's N-type semiconductors 7 links to each other with the pin of adjacent P-type semiconductor 9 in the hot junction, and the pin of while P-type semiconductor 8 links to each other with the pin of adjacent N-type semiconductor 10.Hot junction 2, cold junction 3 and closed-loop path constitute the self energizing parts.
The self energizing parts are electrically connected with infrared transmitter 5, and the infrared signal of infrared transmitter 5 emission fixed wave length, self energizing parts drive infrared transmitter 5 emission infrared signals.
Infrared receiving device 6 receives above-mentioned infrared signal and its light intensity is detected, and simultaneously, the reference temperature sensor 11 that is installed on the infrared receiving device 6 measures reference temperature.Intensity signal and reference temperature information are imported into the calculating output unit, export behind the temperature field information in the sagittal plane of acquisition sealing turning axle.
Above-mentioned infrared receiving device 6 has several; Be installed on the sleeve lining; And the sleeve lining around infrared transmitter 5 distributes a week, can receive corresponding signal and accurately obtain the temperature field information in the sagittal plane of sealing turning axle in any moment that turning axle does not stop to rotate like this.
In the said apparatus, when turning axle 1 rotation, hot junction 2 temperature rise, because lower at the thermal conductivity ratio of the closed environment air of axle sleeve, the temperature in hot junction 2 is greater than the temperature of cold junction 3, and 2 exist temperature difference with cold junction 3 in the hot junction.Based on pyroelectric effect, this moment each semiconductor in the closed-loop path to 2 places will produce the Seebeck electromotive force and claim thermo-electromotive force again in the hot junction, N-type semiconductor is the high potential end, P-type semiconductor is the low potential end.Because each semiconductor is to being connected in series in the closed-loop path, so the electric potential difference that the closed-loop path produces enough drives externally emission infrared signal of infrared transmitter 5, and the infrared signal wavelength of infrared transmitter 5 outside emissions is fixed.Electrical specification according to this infrared transmitter can know that light intensity and Electromotive Difference Of Potential are directly proportional, so temperature difference increases, Electromotive Difference Of Potential just strengthens, so light intensity and temperature difference are directly proportional, the ultrared light intensity of emission just strengthens; Like this; Just can obtain temperature difference through infrared receiving device 6 receiving infrared-rays and detection light intensity again; The reference temperature that records with reference to the reference temperature sensor 11 on the infrared receiving device 6 is simultaneously calculated, and just can obtain sealing the temperature field distribution in the sagittal plane of turning axle.
Computing method are following:
If the temperature of hot junction 2 and cold junction 3 is respectively T
HAnd T
C, the temperature difference Δ T=T of hot junction 2 and cold junction 3 then
H-T
CCan get by the thermoelectric effect formula: 2 places in the hot junction; Each semiconductor centering N-type semiconductor and P-type semiconductor voltage difference are E '=α Δ T; The voltage that whole closed-loop path produced is E=nE '=n α Δ T, and wherein α is a Seebeck coefficient, and n is the right quantity of semiconductor in the closed-loop path.If the system's internal resistance that is made up of self energizing parts and infrared transmitter 5 is R, when then giving infrared transmitter 5 power supplies through above-mentioned voltage, the electric current of infrared transmitter 5 is I=E/R.Characteristic by infrared transmitter 5 can be known, the light intensity I of infrared signal
o=β I, wherein β is the electric property parametric representation emission light intensity of infrared transmitter 5 and the ratio of electric current.And in infrared receiving device 6, can record 5 light intensity I that send IR wavelength of infrared transmitter
oSize, can obtain the temperature difference of hot junction 2 and cold junction 3 like this
If the distance of hot junction and cold junction is L, can get heat flow density
wherein k be the material thermal conductivity coefficient.Further, can calculate the distribution situation in the temperature field in the sagittal plane of sealing turning axle according to heat flow density.It is as shown in Figure 3 that it calculates principle:
If being installed in the reference temperature that the reference temperature sensor 11 on the infrared receiving device 6 records is TB, 2 distances to reference temperature sensor 11 are H from the hot junction, so, with any temperature T of the plan of the axis normal of sealing turning axle 1
xAll can obtain through computes:
Wherein, x be any point on the plane of axis normal with sealing turning axle 1 to the hot junction 2 distance.That is to say, can be through the temperature field distribution situation in the sagittal plane of above calculating acquisition sealing turning axle.
Claims (2)
1. one kind is sealed self-power wireless temperature field measuring apparatus in the turning axle; It is characterized in that; Comprise: the self energizing parts, be used to launch infrared transmitter, infrared receiving device and the calculating output unit of the infrared signal of fixed wave length, the reference temperature sensor that is used for the measuring basis temperature is installed on the said infrared receiving device; Said self energizing parts are electrically connected with infrared transmitter, are used to drive said infrared transmitter emission infrared signal; Said infrared receiving device is used to receive said infrared signal and its light intensity is detected; Said calculating output unit links to each other with said infrared receiving device, exports behind the temperature field information in the sagittal plane that is used to receive said intensity signal and reference temperature information and calculate the sealing turning axle;
Wherein, Said self energizing parts are made up of hot junction, cold junction and the closed-loop path that is located between said hot junction and the cold junction; Said hot junction is close on the turning axle surface in the said sealing turning axle; Said cold junction is exposed in the air and is connected to heating radiator, and to being composed in series, said semiconductor constitutes N-type semiconductor and the P-type semiconductor by fluid-tight engagement by n semiconductor in said closed-loop path; Said infrared receiving device is installed on the sleeve lining.
2. self-power wireless temperature field measuring apparatus in the sealing turning axle as claimed in claim 1 is characterized in that described infrared receiving device is several, and the sleeve lining around said infrared transmitter distributes a week.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103569171A CN102384793A (en) | 2011-11-11 | 2011-11-11 | Self-powered wireless temperature field measuring device in closed rotating shaft |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103569171A CN102384793A (en) | 2011-11-11 | 2011-11-11 | Self-powered wireless temperature field measuring device in closed rotating shaft |
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| CN102384793A true CN102384793A (en) | 2012-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103569171A Pending CN102384793A (en) | 2011-11-11 | 2011-11-11 | Self-powered wireless temperature field measuring device in closed rotating shaft |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104655342A (en) * | 2015-01-15 | 2015-05-27 | 南京林业大学 | Self-power supply and wireless data transmission-based mechanical seal face friction torque measurement device |
| CN113340443A (en) * | 2021-07-16 | 2021-09-03 | 重庆邮电大学 | High-temperature rotating body temperature detection device and method |
| CN114217413A (en) * | 2021-12-13 | 2022-03-22 | 中国科学院光电技术研究所 | Super wide angle broadband polarization imaging system and detection equipment based on super structure surface |
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| CN2135774Y (en) * | 1992-03-12 | 1993-06-09 | 四川省机械研究设计院 | Contactless tester for motor rotator temp. and trouble |
| JPH07221352A (en) * | 1994-01-31 | 1995-08-18 | Tokin Corp | Layered thermoelectric conversion device, subunit for thermoelectric power generation, and power generating unit |
| JP2002202204A (en) * | 2000-12-28 | 2002-07-19 | Sensarray Japan Corp | Spherical semiconductor device for measuring temperature |
| CN201145943Y (en) * | 2007-10-22 | 2008-11-05 | 陈建明 | Temperature difference wireless infrared temperature sensor |
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2011
- 2011-11-11 CN CN2011103569171A patent/CN102384793A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2135774Y (en) * | 1992-03-12 | 1993-06-09 | 四川省机械研究设计院 | Contactless tester for motor rotator temp. and trouble |
| JPH07221352A (en) * | 1994-01-31 | 1995-08-18 | Tokin Corp | Layered thermoelectric conversion device, subunit for thermoelectric power generation, and power generating unit |
| JP2002202204A (en) * | 2000-12-28 | 2002-07-19 | Sensarray Japan Corp | Spherical semiconductor device for measuring temperature |
| CN201145943Y (en) * | 2007-10-22 | 2008-11-05 | 陈建明 | Temperature difference wireless infrared temperature sensor |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104655342A (en) * | 2015-01-15 | 2015-05-27 | 南京林业大学 | Self-power supply and wireless data transmission-based mechanical seal face friction torque measurement device |
| CN106353024A (en) * | 2015-01-15 | 2017-01-25 | 南京林业大学 | Mechanical seal face friction torque measuring device based on piezoelectric effect and wireless data transmission |
| CN106353024B (en) * | 2015-01-15 | 2019-05-07 | 南京林业大学 | Mechanical seal face friction torque measuring device based on piezoelectric effect power supply |
| CN113340443A (en) * | 2021-07-16 | 2021-09-03 | 重庆邮电大学 | High-temperature rotating body temperature detection device and method |
| CN114217413A (en) * | 2021-12-13 | 2022-03-22 | 中国科学院光电技术研究所 | Super wide angle broadband polarization imaging system and detection equipment based on super structure surface |
| CN114217413B (en) * | 2021-12-13 | 2023-08-11 | 中国科学院光电技术研究所 | Super-structured surface-based ultra-wide-angle broadband polarization imaging system and detection equipment |
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Application publication date: 20120321 |