CN213067942U - Double-color infrared thermometer - Google Patents
Double-color infrared thermometer Download PDFInfo
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- CN213067942U CN213067942U CN202021563644.9U CN202021563644U CN213067942U CN 213067942 U CN213067942 U CN 213067942U CN 202021563644 U CN202021563644 U CN 202021563644U CN 213067942 U CN213067942 U CN 213067942U
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Abstract
The utility model relates to a double-color infrared thermometer, which comprises a thermometer body, wherein an optical system for infrared temperature measurement is arranged in the thermometer body and mainly comprises a field diaphragm, a lens, a spectroscope, a first aperture diaphragm, a second aperture diaphragm, a first filter, a second filter and the like; the thermometer body is also internally provided with a first infrared detector and a second infrared detector which convert optical signals into electric signals; the utility model has the advantages that: high cost performance, high precision and strong anti-interference capability. The utility model discloses a design optimization obtains the optimal size and the position of field diaphragm and aperture diaphragm, has reduced the influence of radiation source size effect to measuring result.
Description
Technical Field
The utility model relates to a temperature measurement technical field specifically, relates to a double-colored infrared radiation thermometer.
Background
The infrared temperature measurement technology is one of the main methods of non-contact temperature measurement technology, and the infrared temperature measurement technology is mainly used for determining the temperature of an object according to the infrared radiation energy of the object to be measured and is not in contact with the object to be measured. The infrared thermometer has the characteristics of no disturbance of the temperature distribution field of the measured object, high temperature resolution, high response speed, wide temperature measurement range, good stability and the like, and meets the requirements of industrial online detection work.
However, infrared radiation thermometry is still subject to many factors, with radiation source size effects being an important source of uncertainty in infrared radiation thermometry. It is mainly the result of the scattering caused by dust in the optical elements and optical system of the infrared thermometer, the mutual reflection between the lens surfaces, the aberration and diffraction of the optical system, the stray light in the surrounding environment, and so on. The energy of the stray light received by the detector mainly comes from two parts: the external stray light of the infrared thermometer and the internal stray light of the optical system of the infrared thermometer are respectively referred to as external stray light and internal stray light hereinafter. Under the condition of high-precision measurement, the influence of stray light on a measurement result cannot be ignored.
Therefore, a new technical solution is needed to solve the above technical problems.
Disclosure of Invention
The utility model aims at providing a double-colored infrared radiation thermometer that sexual valence relative altitude, precision are high and the interference killing feature is strong, its main advantage lies in can reducing the influence of radiation source size effect to the temperature measurement result.
Consider stray light to infrared thermometer measuring result's influence, the utility model discloses a size and the position of design optimization aperture diaphragm reduce the size of field diaphragm and aperture diaphragm under the prerequisite that satisfies the minimum detection requirement of detector to the position of adjustment field diaphragm and aperture diaphragm, with the energy that reduces stray light radiation to the detector surface.
The above purpose is realized by the following technical scheme:
an infrared thermometer, comprising: infrared radiation thermometer body, characterized by: the method is characterized in that: the infrared temperature measurement optical system is arranged inside the thermodetector body and mainly comprises a field diaphragm (103), a lens (104), a spectroscope (105), a first aperture diaphragm (106), a second aperture diaphragm (110), a first filter (107) and a second filter (111), wherein a first infrared detector (108) and a second infrared detector (112) are respectively placed on the rear sides of the first filter (107) and the second filter (111), and the first infrared detector (108) and the second infrared detector (112) are electrically connected with a microprocessor. The energy radiated by the object to be measured is focused on the spectroscope (105) through the lens (104), the spectroscope (105) divides the light into two parts, one part is absorbed and measured by the first infrared detector (108) through the first aperture diaphragm (106) and the first filter (107), and the other part is absorbed by the second infrared detector (112) through the second aperture diaphragm (110) and the second filter (111). The first infrared detector (108) and the second infrared detector (112) convert the optical signal into an electrical signal. The diameter of the field diaphragm (103) is 20mm, the distance from the detector is 2mm, and the requirements of simple installation and reduction of the influence of external stray light (102) can be met. The diameters of the first aperture diaphragm (106) and the second aperture diaphragm (110) are both 1.5mm, the distance between the first aperture diaphragm and the second aperture diaphragm is 5mm from the detector, the requirements of simple installation and reduction of the influence of internal stray light (109) can be met, the influence of external stray light (102) and internal stray light (109) is reduced, and the related formula comprises the following steps:
Mall＝Mobj+Menv
wherein M isallFor the total energy received by the detector, MobjFor the energy radiated by the object to be measured to the detector, MenvFor the influence of environmental factors, the energy of stray light received by the detector is included, and on the premise of ensuring that the minimum resolution requirement of the detector is met, the energy of the stray light radiated to the surface of the detector can be reduced by reducing the size of the aperture diaphragm.
The transmission wave bands of the first filter (105) and the second filter (109) are near the responsivity peak value of 1.55um of the first infrared detector (108) and the second infrared detector (112).
The diameters of the photosensitive areas of the first infrared detector (108) and the second infrared detector (112) are 1 mm.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses a size and the rational selection best position of design aperture diaphragm can reduce the influence of radiation source size effect to measuring result for the measuring accuracy obtains improving.
Drawings
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic view of an infrared temperature measurement optical system according to an embodiment of the present invention.
The figures show that: an object to be measured 101, external stray light 102, a field stop 103, a lens 104, a beam splitter 105, a first aperture stop 106, a first filter 107, a first infrared detector 108, internal stray light 109, a second aperture stop 110, a second filter 111, a second infrared detector 112,
Detailed Description
As shown in fig. 1, the utility model provides a pair of double-colored infrared thermometer, it is specific, the utility model discloses this internal field of view diaphragm (103), lens (104), spectroscope (105), first aperture diaphragm (106), second aperture diaphragm (110), first filter (107), second filter (111), first infrared detector (108) and second infrared detector (112) of being equipped with. Wherein: the field diaphragm 103 filters external stray light, the lens 104 realizes a focusing function, the first aperture diaphragm 106 and the second aperture diaphragm 110 are used for controlling the size of an incident beam, the first filter 107 and the second filter 111 are used for realizing a filtering function, and the first infrared detector 108 and the second infrared detector 112 realize measurement. The energy radiated by the object to be measured is focused on the spectroscope 105 by the lens 104 through the field diaphragm 103, the spectroscope 105 divides the light into two parts, one part is absorbed and measured by the first infrared detector 108 through the first aperture diaphragm 106 and the first filter 107, the other part is absorbed and measured by the second infrared detector 112 through the second aperture diaphragm 110 and the second filter 111, and the two paths of signals are subjected to ratio processing after being converted and signal processing to simulate the temperature change of the target.
The diameter of the field diaphragm 103 of the utility model is 20mm, and the distance from the lens is 2 mm; the beam splitter 105 may be a neutral beam splitter having a transmission to reflection ratio of 50/50; the diameters of the first aperture diaphragm 106 and the second aperture diaphragm 110 are 2mm, and the distance from the detector is 15 mm; the distance coefficient of the infrared temperature measurement light path can be selected to be 75: 1; the energy obtained by the light path of the infrared temperature measurement system can be subjected to photoelectric conversion by a photoelectric detector, the specification of a light spot which can be detected is selected to be phi 1mm, and the peak value of the responsivity is 1.5 um.
As shown in FIG. 1, the utility model discloses through the influence of comparative aperture diaphragm and field diaphragm and position and size to the radiant energy that the detector received, finally on satisfying detector measurement requirement's basis, confirmed field diaphragm and aperture diaphragm size and position, realized reducing the purpose of radiation source size effect to measuring result's influence.
The utility model discloses an optical system designs emulation software and carries out the design of optical device parameter, the construction of infrared temperature measurement system light path, and the size through design field of view diaphragm and aperture diaphragm selects the optimum position rationally, then utilizes optical system design emulation software to carry out the analysis in order to guarantee the realizability and the reliability of the optical system who designs to optical system's performance.
Claims (7)
1. The utility model provides a double-colored infrared radiation thermometer, includes the thermoscope, its characterized in that: inside the thermoscope by field of view diaphragm (103), lens (104), spectroscope (105), first aperture diaphragm (106), second aperture diaphragm (110), first filter (107) and second filter (111) in proper order, first infrared detector (108) and second infrared detector (112) have been placed respectively to the rear side of first filter (107) and second filter (111), and microprocessor constitutes infrared temperature measurement optical system is connected to first infrared detector (108) and second infrared detector (112) electricity.
2. The dual-color infrared thermometer according to claim 1, wherein the first aperture stop (106) and the second aperture stop (110) are arranged at right angles at the rear end of the beam splitter (105).
3. A dichromatic infrared thermometer according to claim 1, characterized in that the energy radiated by the object to be measured is focused by means of a lens (104) onto a beam splitter (105), which beam splitter (105) splits the light into two parts, one part being absorbed by the first infrared detector (108) via a first aperture stop (106) and a first filter (107) and the other part being absorbed by the second infrared detector (112) via a second aperture stop (110) and a second filter (111).
4. A dual color infrared thermometer according to claim 1 or 3, characterized in that the first infrared detector (108) and the second infrared detector (112) convert the optical signal into electrical signals.
5. A bi-colour infrared thermometer according to claim 1, characterised in that the field stop (103) is 20mm in diameter and 2mm from the lens.
6. A dual colour infrared thermometer according to claim 1, 2 or 3, characterised in that the first aperture stop (106) and the second aperture stop (110) are each 2mm in diameter and 5mm from the detector.
7. A dual-colour infrared thermometer according to claim 1, characterised in that the photosensitive areas of the first (108) and second (112) infrared detectors are 1mm in diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021563644.9U CN213067942U (en) | 2020-07-31 | 2020-07-31 | Double-color infrared thermometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021563644.9U CN213067942U (en) | 2020-07-31 | 2020-07-31 | Double-color infrared thermometer |
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| CN213067942U true CN213067942U (en) | 2021-04-27 |
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| CN202021563644.9U Active CN213067942U (en) | 2020-07-31 | 2020-07-31 | Double-color infrared thermometer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114414063A (en) * | 2021-12-17 | 2022-04-29 | 杭州麦乐克科技股份有限公司 | Double-focusing infrared high-temperature measuring device |
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2020
- 2020-07-31 CN CN202021563644.9U patent/CN213067942U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114414063A (en) * | 2021-12-17 | 2022-04-29 | 杭州麦乐克科技股份有限公司 | Double-focusing infrared high-temperature measuring device |
| CN114414063B (en) * | 2021-12-17 | 2024-01-19 | 杭州麦乐克科技股份有限公司 | Dual focusing infrared high temperature measuring device |
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