CN215338596U - Constant temperature liquid groove type surface radiation source device - Google Patents
Constant temperature liquid groove type surface radiation source device Download PDFInfo
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- CN215338596U CN215338596U CN202121683299.7U CN202121683299U CN215338596U CN 215338596 U CN215338596 U CN 215338596U CN 202121683299 U CN202121683299 U CN 202121683299U CN 215338596 U CN215338596 U CN 215338596U
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Abstract
The utility model discloses a constant-temperature liquid tank type surface radiation source device which comprises a case, a tank body arranged in the case and a touch screen controller fixed on the case, wherein the tank body is provided with a plurality of grooves; a temperature adjusting device is arranged in the tank body; a surface radiation source is embedded between the tank body and the case, vent holes are uniformly distributed on the periphery of the surface radiation source, and the vent holes are connected with a gas supply device through vent pipes; the touch screen controller is used for the work of temperature adjusting device and air feeder, and when the temperature is less than the settlement temperature, air feeder ventilates to the air vent. The uniformity and the stability of the temperature field are improved, the technical index of the surface radiation source is improved, and the problem that the uniformity and the stability of the surface radiation source of the temperature field provided by the conventional dry semiconductor are poor is solved.
Description
Technical Field
The utility model belongs to the field of thermodynamic measurement, and particularly relates to a constant-temperature liquid tank type surface radiation source standard device.
Background
The blackbody radiation source is a main standard instrument for detecting various infrared radiation thermometers and infrared thermal imagers, and the most main requirements for the technical indexes of the blackbody radiation source are uniformity, stability and emissivity. The surface radiation source is a black body radiation source emerging in recent years, the application of the surface radiation source in a low-temperature and medium-temperature section is more extensive, the surface radiation source can provide a radiation field with a larger area compared with other cavity type black bodies, and the influence of a radiation Source Size Effect (SSE) is reduced, but the current surface radiation source has the following problems: firstly, the uniformity and stability of a radiation source are poor due to the fact that the dry-type semiconductor material is used for lifting and temperature control, large errors are introduced for calibrating various infrared radiation thermometers, particularly when a thermal imager is calibrated, the uniformity of a temperature field is an important technical index, and great influence is easily brought to a calibration result; the emissivity of the surface radiation source 8 is low and is difficult to adjust, the current national verification regulation is JJJG 856-2015 radiation thermometer for work, wherein the application range is definitely indicated as a single-band radiation thermometer with the emissivity set value capable of being set to 1 and a colorimetric thermometer with the emissivity ratio capable of being set to 1, the emissivity of most of the surface radiation sources is 0.95-0.97 at present, and the calibration work of the high-emissivity radiation thermometer is difficult to meet; when the temperature is lower than 0 ℃, the surface of the black body is frosted due to the condensation of water vapor in the air, and the calibration data is seriously influenced.
Disclosure of Invention
The utility model aims to provide a constant-temperature liquid tank type surface radiation source standard device to improve the uniformity and stability of a temperature field, improve the technical index of a surface radiation source and solve the problem that the uniformity and stability of the surface radiation source of the temperature field provided by the conventional dry semiconductor are poor.
The technical solution for realizing the purpose of the utility model is as follows:
a constant-temperature liquid tank type surface radiation source standard device is characterized by comprising a case, a tank body arranged in the case and a touch screen controller fixed on the case; a temperature adjusting device is arranged in the tank body;
a surface radiation source is embedded between the tank body and the case, vent holes are uniformly distributed on the periphery of the surface radiation source, and the vent holes are connected with a gas supply device through vent pipes; the touch screen controller is used for the work of temperature adjusting device and air feeder, and when the temperature is less than the settlement temperature, air feeder ventilates to the air vent.
Compared with the prior art, the utility model has the following remarkable advantages:
(1) the technical index of the surface radiation source is greatly improved by utilizing the characteristic that the uniformity and the stability of the temperature field of the constant-temperature liquid tank are far superior to those of the current dry-type semiconductor temperature field, and the technical index far exceeds the technical requirements on the surface radiation source in two national technical specifications of JJJG 856-2015 work radiation thermometer verification procedure and JJF 1187-2008 thermal imager calibration specification.
(2) The intelligent temperature control instrument is used, when the temperature in the constant-temperature liquid tank is lower than 0 ℃, the nitrogen electromagnetic valve is automatically controlled to be opened, and through the design of the annular air outlet, a nitrogen gas curtain is formed at the bottom of the surface radiation source, so that frosting is prevented from affecting measurement data.
Drawings
FIG. 1 is a schematic diagram of a complete equipment of a constant temperature bath profile radiation source standard device of the present invention.
FIG. 2 is a schematic sectional view of the assembly of the constant temperature liquid bath and the surface radiation source of the present invention.
FIG. 3 is a schematic diagram of a nitrogen gas conduction structure of the surface radiation source of the present invention.
FIG. 4 is a schematic view of a touch screen control interface according to the present invention.
Detailed Description
The utility model is further described with reference to the following figures and embodiments.
The utility model relates to a constant-temperature liquid tank type surface radiation source standard device, which comprises a case 1, a tank body 2 arranged in the case 1 and a touch screen controller 3 fixed on the case, wherein a stirring device 4, a heating device 5, a compressor refrigerating device and a platinum resistance thermometer 7 are arranged in the tank body 2, the stirring device 4 is fixed on the case 1, a heating pipe of the heating device 5 is fixed on the tank body 2 to heat liquid in the tank body 2, the platinum resistance thermometer 7 is used for detecting the temperature in the tank body 2, a hollow baffle 9 is arranged in the tank body 2, a surface radiation source 8 is embedded in the tank body 2, the surface radiation source 8 is made of red copper with good heat conductivity, a high-emissivity coating is uniformly coated on the bottom surface, and good temperature conduction can be realized; a precise constant-temperature liquid tank is used for providing a uniform and stable temperature field, so that the black body surface radiation source 8 has good temperature stability and uniformity on the whole bottom surface; the surface radiation source 8 is simultaneously embedded in the housing 1.
The precise constant-temperature liquid tank is operated and controlled by using the touch screen controller 3, is communicated with the intelligent temperature control instrument through an RS-232 communication protocol, and sends an instruction to the temperature control instrument, and the temperature control instrument leads the tank body 2 to reach the set temperature through a PID temperature control mode; the liquid tank is provided with a stirring device 4, a heating device 5 and a compressor refrigerating device, the stirring device 4 is used for stirring through a spiral fan blade to enable liquid in the tank to realize sufficient heat circulation, the temperature uniformity is guaranteed, the heating device 5 is used for heating the liquid in the tank through a heating wire in a heating pipe, the compressor refrigerating device is used for condensing high-pressure steam into refrigerating liquid through a condenser, the refrigerating liquid enters a coil 6 arranged in the tank body 2 after passing through a filter and a throttling element and is evaporated under corresponding low pressure, the surrounding heat is absorbed, and the liquid in the tank is cooled; an AA grade platinum resistance thermometer 7 is arranged in the tank body 2 to measure the temperature of the tank body 2 in an actual measurement mode, a signal is fed back to the temperature control instrument, the temperature control instrument adjusts the power for heating and refrigerating the thermostatic tank through a proportional integral derivative algorithm, so that the temperature of liquid in the tank keeps good stability, the technical indexes of the liquid thermostatic tank can generally meet the requirements that the uniformity is less than or equal to 0.020 ℃, the stability is less than or equal to 0.010 ℃/10min, the uniformity is less than or equal to 0.15 ℃ and the stability is less than or equal to 0.1 ℃/10min in JJJJJG 856-2015; the tank body 2 is internally welded with the hollowed-out baffle 9 along the vertical direction, and the hollowed-out baffle 9 is uniformly provided with flow guide holes, so that the liquid circulation is not obstructed, and the effects of protecting the stirring device 4, the heating device 5, the refrigeration coil and the temperature control platinum resistor are achieved.
The surface radiation source 8 is integrally of a disc type structure, the bottom surface is a black body surface source, the design diameter is 150mm, the requirement of the view field diameter of almost all infrared thermometers in the current market can be met, and the bottom surface is uniformly coated with a black paint material with the fixed emissivity of 0.95, so that the default emissivity of the surface radiation source 8 reaches 0.95; the surface radiation source 8 is made of red copper, and the thickness of the bottom and the part of the periphery of the bottom, which is embedded into the liquid tank, is 2mm, so that a good heat conduction effect is achieved; the vent holes 81 with the diameter of 1cm are uniformly distributed on the periphery of the middle section of the surface radiation source 8, when nitrogen enters through the vent guide pipe 82 at a certain flow rate, an integrally sealed nitrogen gas curtain can be formed at the bottom of the surface radiation source 8, and the frosting caused by the condensation of water vapor in the air at low temperature is prevented.
The nitrogen gas curtain supplies gas through a nitrogen gas bottle, the gas is decompressed through a decompression valve and then is introduced into a gas filter, the gas filter filters gas impurities and then reaches an electromagnetic valve 83, when the temperature of the tank body 2 measured by an A-level platinum resistance thermometer in the tank is lower than 0 ℃, a touch screen controller 3 automatically sends an instruction to control a temperature control instrument to output an on-off signal to the electromagnetic valve 83, the electromagnetic valve is automatically opened, the nitrogen enters a float flowmeter 84 with a well-regulated fixed flow value and then enters a gas access port on the surface radiation source 8, the gas is sprayed out from peripheral vent holes to discharge the air in the peripheral space, and a sealed gas curtain is formed at the bottom of the surface radiation source 8, so that the frosting of the radiation source surface caused by the low-temperature condensation of water vapor in the air is prevented; the nitrogen gas curtain is automatically controlled by the electromagnetic valve 83, and the frosting influence caused by forgetting to open the nitrogen gas valve in the current manual control can be avoided. The nitrogen gas cylinder supplies gas through a flowmeter arranged on the vent hole 81, an electromagnetic valve 83 and the surface radiation source (8).
The method comprises the steps that a platinum resistance thermometer arranged outside an instrument measures the ambient temperature in real time, the emissivity and the working wave band of a detected infrared radiation thermometer are arranged on a touch screen control interface, the difference between the blackbody brightness temperature under the emissivity and the working wave band and the blackbody brightness temperature with the emissivity of 1 is obtained by utilizing the following formula relation, a touch screen controller 3 automatically controls a temperature control instrument to correct and adjust the actual temperature of a constant-temperature liquid tank, so that the brightness temperature of a surface radiation source 8 reaches the brightness temperature under the condition of corresponding emissivity, and the self setting and automatic adjustment of any temperature point, any working wave band and emissivity are realized. The method comprises the following steps of obtaining the difference between the brightness temperature of the black body with the fixed emissivity and the brightness temperature of the black body with the emissivity of 1 by utilizing the Planck black body radiation law, further obtaining the relation between the brightness temperature and the brightness temperature of the black body with other emissivity, wherein the relation between the brightness temperature and the black body temperature is as follows:
wherein T is temperature (unit: K), TbbIs the black body temperature (unit: K), TinIs the luminance temperature (unit: K), TamIs the ambient temperature (unit: K), epsilon is the emissivity of the blackbody radiation source (unit: 1), lambda is the wavelength (unit: m), lambda is1、λ2Is the lower limit and the upper limit (unit: m) of the band, Lb(λ,Tbb) Is a spectral radiance at a temperature of a black body (unit: w.m-3·sr-1)，Lb(λ,Tin) Is a spectral radiance at a temperature of luminance (unit: w.m-3·sr-1)，Lb(λ,Tam) Is a spectral radiance at ambient temperature (unit: w.m-3·sr-1)， c1Is a first radiation constant (value of 3.7418 × 10)-16The unit: w.m2)，c2Is the second radiation constant (value of 14.388 × 10)-2The unit: W.K).
A user can set the emissivity and the working waveband of the infrared thermometer to be detected through the touch screen controller interface, the instrument calculates the relation between the brightness temperature and the surface radiation source temperature according to the Planck radiation law and the parameters such as the temperature measured in real time, the tank temperature is corrected automatically, and the calibration requirements of the user on the infrared radiation thermometers, the infrared thermal imagers and other instruments with different working wavebands and different emissivity are met.
According to the constant-temperature liquid tank type surface radiation source standard device, a uniform and stable temperature field is provided for a black body surface radiation source by utilizing the constant-temperature liquid tank provided with the refrigeration compressor and the heating pipe, the uniformity and the stability of the temperature field are greatly improved by utilizing the good circulation and the heat conductivity of a liquid medium, the technical index of the surface radiation source is improved, and the problem that the uniformity and the stability of the surface radiation source of the temperature field provided by the conventional dry semiconductor are poor is solved; utilize intelligent temperature control instrument, when constant temperature cistern temperature is less than 0 ℃, open the gas cylinder solenoid valve automatically, supply with nitrogen gas, utilize face radiation source quotation venthole all around to blow off nitrogen gas, form the gas curtain before the face radiation source, prevent the face radiation source frosting, solved the blackbody radiation source steam condensate when low temperature or forget when cooling open the blackbody surface frosting that the pneumatic valve arouses, influence measuring result's problem.
Claims (8)
1. A constant-temperature liquid tank type surface radiation source device is characterized by comprising a case (1), a tank body (2) arranged in the case (1), and a touch screen controller (3) fixed on the case; a temperature adjusting device is arranged in the tank body (2);
a surface radiation source (8) is embedded between the tank body (2) and the case (1), vent holes (81) are uniformly distributed around the surface radiation source (8), and the vent holes (81) are connected with an air supply device through vent conduits; the touch screen controller (3) is used for the work of the temperature adjusting device and the air supply device, and when the temperature is lower than the set temperature, the air supply device supplies air to the air vent (81).
2. The thermostatic bath-type surface radiation source device according to claim 1, wherein the temperature adjusting device comprises a stirring device (4), a heating device (5), a compressor cooling device and a platinum resistance thermometer (7); the stirring device (4) is fixed on the case (1), a heating pipe of the heating device (5) is fixed on the tank body (2) to heat liquid in the tank body (2), and the platinum resistance thermometer (7) is used for detecting the temperature in the tank body (2); the compressor refrigerating device is used for cooling the liquid in the tank body (2); the stirring device (4) is used for heat circulation in the tank body (2).
3. The constant-temperature liquid tank type surface radiation source device as claimed in claim 2, wherein a hollowed-out baffle plate (9) is arranged in the tank body (2), and diversion holes are uniformly distributed on the hollowed-out baffle plate (9).
4. The constant-temperature liquid tank type surface radiation source device as claimed in claim 1, wherein the gas supply device comprises a nitrogen gas bottle, an electromagnetic valve (83), a flow meter; the nitrogen gas cylinder supplies gas through a flowmeter and an electromagnetic valve (83) which are arranged on the vent hole (81) and the surface radiation source (8).
5. Thermostatic liquid bath-type surface radiation source device according to claim 1, characterized in that the surface radiation source (8) is of disc-type construction.
6. The constant-temperature liquid tank type surface radiation source device as claimed in claim 1, wherein the bottom surface of the surface radiation source (8) is uniformly coated with a black paint material with a fixed emissivity.
7. Constant-temperature liquid bath type surface radiation source device according to claim 1, characterized in that the surface radiation source (8) is made of red copper material.
8. A thermostatic bath-type surface radiation source device according to claim 1, characterized in that the thickness of the surface radiation source (8) embedded in the bath portion is 2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121683299.7U CN215338596U (en) | 2021-07-23 | 2021-07-23 | Constant temperature liquid groove type surface radiation source device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121683299.7U CN215338596U (en) | 2021-07-23 | 2021-07-23 | Constant temperature liquid groove type surface radiation source device |
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| Publication Number | Publication Date |
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| CN215338596U true CN215338596U (en) | 2021-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121683299.7U Active CN215338596U (en) | 2021-07-23 | 2021-07-23 | Constant temperature liquid groove type surface radiation source device |
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2021
- 2021-07-23 CN CN202121683299.7U patent/CN215338596U/en active Active
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