CN211978111U - Low-value calibration device for ultraviolet irradiance meter - Google Patents
Low-value calibration device for ultraviolet irradiance meter Download PDFInfo
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- CN211978111U CN211978111U CN202020507164.4U CN202020507164U CN211978111U CN 211978111 U CN211978111 U CN 211978111U CN 202020507164 U CN202020507164 U CN 202020507164U CN 211978111 U CN211978111 U CN 211978111U
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Abstract
The application relates to a low-value calibration device and a calibration method for an ultraviolet irradiance meter, wherein the device comprises an optical platform, three sets of calibration basic units positioned on the optical platform and a standard ultraviolet irradiance meter; each set of calibration basic unit comprises an ultraviolet light source, a precision diaphragm, a blind plate, a filter set and an attenuation set which are sequentially arranged on the same straight line; the ultraviolet light sources of the three sets of calibration basic units are respectively a first ultraviolet light source positioned in the middle, a second ultraviolet light source positioned at the rear and a third ultraviolet light source positioned at the front; the three incoherent ultraviolet light sources emit light which is converged at the center of a standard ultraviolet irradiance meter receiver after passing through a precision diaphragm, a filter set and a damping sheet set, a calibrated ultraviolet irradiance meter is placed behind the damping sheet set at the middle position, and the calibrated ultraviolet irradiance meter and the damping sheet set are on the same horizontal line. The calibration equipment is few, and no equipment such as light rail, easy operation, with low costs, the device is small, and the portability is measured on the spot.
Description
Technical Field
The utility model relates to the field of photoelectric technology, especially, relate to a low value calibrating device of ultraviolet irradiance meter.
Background
The ultraviolet detection technology is a dual-purpose photoelectric detection technology for military and civil use developed after infrared and laser detection technologies, and the high-sensitivity ultraviolet detector is also widely used in the fields of flame sensing, ozone detection, laser detection, fluorescence analysis, astronomy research and the like. The ultraviolet irradiance meter is an important instrument for detecting the radiation intensity of an ultraviolet light source, and is widely applied to the fields of ultraviolet detection, medical treatment, epidemic prevention, energy conservation, environmental protection, photoelectric reaction and the like.
The international universal ultraviolet band calibration technology takes a low-temperature radiometer as an absolute standard detector, takes a trap detector and a thermoelectric detector as a transmission standard detector, and transmits the standard of an ultraviolet band to a silicon detector to be detected. Through years of intensive research, the Chinese metrological research institute takes an NIST ultraviolet standard detector as a core to construct a set of high-precision ultraviolet radiometer. And (3) carrying out performance test on each element in the device, evaluating the stability of the whole device, and deriving the self-responsivity standard of the high-precision ultraviolet radiometer on the basis. Therefore, the first domestic ultraviolet radiometer with high precision, high stability and self-responsiveness standard is developed. Domestic big optical metering stations: measurement and test technology and technology limited companies in Jiangsu province measurement and science research institute, China test technology research institute, national defense science and technology industry optical primary metering station (optical calibration and detection laboratory of the institute of optics applied to Xian), and the like, a high-precision ultraviolet radiometer developed by the China measurement and science research institute is adopted to establish an ultraviolet radiometer calibration device, and the measurement and transfer work is carried out by adopting a standard ultraviolet irradiance meter comparison method according to JJG879-2015 ultraviolet radiometer calibration procedures. As the high-precision ultraviolet radiometer developed by the Chinese metrological scientific research institute is mainly used for the ultraviolet radiometer applied to the fields of nondestructive testing, photoetching, disinfection, curing and the like, the radiation power is more than 10 mu W. The traceability requirements of low value irradiance meters cannot be met. Meanwhile, because 100 nm-200 nm ultraviolet radiation is strongly absorbed in the air, the calibration method specified in JJG879-2015 ultraviolet radiation illuminometer calibration procedure is not applicable to 100 nm-200 nm ultraviolet radiation, so that 100 nm-200 nm ultraviolet radiation cannot be traced.
Therefore, the development of a low-value calibration device of the ultraviolet irradiance meter is very necessary, and the device also has an important application prospect.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention has been made to provide an ultraviolet irradiance meter low value calibration apparatus and a calibration method that overcome or at least partially solve the above problems.
In a first aspect, a low value calibration device for an ultraviolet irradiance meter is provided, which comprises an optical platform, three sets of calibration base units positioned on the optical platform and a standard ultraviolet irradiance meter; each set of calibration basic unit comprises an ultraviolet light source, a precision diaphragm, a blind plate, a filter set and an attenuation set which are sequentially arranged on the same straight line; the ultraviolet light sources of the three sets of calibration basic units are respectively a first ultraviolet light source positioned in the middle, a second ultraviolet light source positioned at the rear and a third ultraviolet light source positioned at the front; the three incoherent ultraviolet light sources emit light which is converged at the center of a standard ultraviolet irradiance meter receiver after passing through a precision diaphragm, a filter set and a damping sheet set, a calibrated ultraviolet irradiance meter is placed behind the damping sheet set at the middle position, and the calibrated ultraviolet irradiance meter and the damping sheet set are on the same horizontal line.
Preferably, the precision diaphragm is a primary precision diaphragm with a precise scale.
Preferably, the uv light source housing is designed as a small dark box.
Preferably, the filter set is a narrowband filter.
Preferably, the included angle between the connecting line from the center of the detection surface of the calibrated ultraviolet irradiance meter to the center of the pinhole imaging light source and the optical axis of the ultraviolet light source is not more than 15 degrees.
In a second aspect, a calibration method is provided, which is applied to the ultraviolet irradiance meter low-value calibration apparatus in the first aspect, and includes step S1, turning on all ultraviolet light sources, removing the blind plate at the middle position of the first ultraviolet light source, removing all the attenuation sheet groups, and reading a standard value Q by using a standard irradiance meter; step S2, removing the standard irradiance meter, placing the calibrated ultraviolet irradiance meter at the same position, and reading the display value of the calibrated ultraviolet irradiance meter to be used as a first measurement value Q1; step S3, placing the blind plate at the middle position, removing the blind plates at the front and rear positions of the third ultraviolet light source and the second ultraviolet light source respectively, adjusting the precision diaphragm, placing and replacing the attenuation sheet group, so that a second measured value Q2 and a third measured value Q3 displayed by the ultraviolet correction irradiance meter when the blind plates at the front and rear positions of the third ultraviolet light source and the second ultraviolet light source are removed respectively are equal, and a fourth displayed value Q4 displayed by the ultraviolet correction irradiance meter when the blind plates at the front and rear positions of the third ultraviolet light source and the second ultraviolet light source are removed completely is equal to the first measured value Q1 of the step S2, wherein Q2 and Q3 are half of the standard value Q of the step S1; step S4, placing the blind plates at the front and rear positions of the third ultraviolet light source and the second ultraviolet light source, removing the blind plate at the middle position of the first ultraviolet light source, adjusting the precision diaphragm, and placing and replacing the attenuation sheet group, so that a fifth measurement value Q5 displayed by the calibrated ultraviolet irradiance meter is obtained, at this time, Q5 is Q2 is Q3, and the illuminance of the first ultraviolet light source is half of the Q1 standard value in step S1; and step S5, repeating the steps S1-S4 until the lowest calibration point of the ultraviolet irradiance meter.
The utility model has the advantages of simple operation and low cost because of the adoption of less calibration equipment and no equipment such as light rails and the like; an optical rail is not needed, the device is small in size and can be carried to carry out field metering; the distance between the calibrated equipment and the standard light source is short and unchanged, and calibration errors caused by attenuation of deep ultraviolet light in air are avoided.
The above description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the present invention is given.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a low-value calibration apparatus for an ultraviolet irradiance meter according to an embodiment of the present invention;
description of reference numerals:
1-optical platform, 2-ultraviolet light source, 3-precision diaphragm, 4-blind plate, 5-filter set, 6-attenuation set and 7-standard ultraviolet radiation illuminometer
21-a first uv light source, 22-a second uv light source, 23-a third uv light source.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The terms "comprises" and "comprising," and any variations thereof, in the described embodiments of the invention, and in the claims and drawings, are intended to cover a non-exclusive inclusion, such as a list of steps or elements.
The technical solution of the present invention will be described in further detail with reference to the accompanying drawings and embodiments.
As shown in fig. 1, the embodiment of the present invention provides a low value calibration device for an ultraviolet irradiance meter, which includes an optical platform 1, three sets of calibration basic units located on the optical platform 1, and a standard ultraviolet irradiance meter 7.
Each set of calibration basic unit comprises an ultraviolet light source 2, a precision diaphragm 3, a blind plate 4, a filter set 5 and an attenuation sheet set 6 which are sequentially arranged on the same straight line;
the three sets of calibration basic units of the ultraviolet light sources 2 are respectively a first ultraviolet light source 21 positioned in the middle, a second ultraviolet light source 22 positioned at the back and a third ultraviolet light source 23 positioned at the front;
And (3) calibration process:
step S1, turning on all the ultraviolet light sources 2, removing the blind plate 4 at the middle position of the first ultraviolet light source 21, removing all the attenuation sheet groups 6, and reading a standard value Q by using a standard irradiance meter 7;
step S2, removing the standard irradiance meter 7, placing the calibrated ultraviolet irradiance meter at the same position, and reading the display value of the calibrated ultraviolet irradiance meter to be used as a first measurement value Q1;
step S3, placing the blind plate 4 at the middle position, removing the blind plate 4 at the front and rear positions where the third ultraviolet light source 23 and the second ultraviolet light source 22 are located, respectively, adjusting the precision diaphragm 3, and placing and replacing the attenuation sheet set 6, so that a second measurement value Q2 and a third measurement value Q3 displayed by the ultraviolet correction irradiance meter when the blind plate 4 at the front and rear positions where the third ultraviolet light source 23 and the second ultraviolet light source 22 are located are removed, respectively, are equal, and a fourth display value Q4 displayed by the ultraviolet correction irradiance meter when the blind plate 4 at the front and rear positions where the third ultraviolet light source 23 and the second ultraviolet light source 22 are located are removed is equal to the first measurement value Q1 of the step S2, at this time, Q2 and Q3 are half of the standard value Q of the step S1;
step S4, placing the blind plate 4 at the front and rear positions of the third ultraviolet light source 23 and the second ultraviolet light source 22, removing the blind plate 4 at the middle position of the first ultraviolet light source 21, adjusting the precision diaphragm 3, and placing and replacing the attenuation sheet group 6, so that the fifth measurement value Q5 displayed by the calibrated ultraviolet irradiance meter is obtained, at this time, Q5 is Q2 is Q3, and the illuminance of the first ultraviolet light source 21 is half of the standard value Q1 in step S1.
And step S5, repeating the steps S1-S4 until the lowest calibration point of the ultraviolet irradiance meter.
The blind plate 4 is in the utility model discloses in play the effect of changing the light path for before realizing, ultraviolet source 2 of two sets of the same models of back position shines simultaneously by school ultraviolet irradiance meter through precision diaphragm 3, filter group 5, attenuator group 6 on, the first ultraviolet source 21 of intermediate position shines alone through precision diaphragm 3, filter group 5, attenuator group 6 and is changed by the light path on the school ultraviolet irradiance meter.
In one example, the third uv light source 23 and the second uv light source 22 pass through the front and back positions, the precision diaphragm 3, the filter set 5, and the attenuator set 6 are simultaneously irradiated onto the calibrated uv irradiance meter, and the first uv light source 21 passes through the middle position, the precision diaphragm 3, the filter set 5, and the attenuator set 6 are separately irradiated onto the calibrated uv irradiance meter, by removing and placing the blind plate 4.
In one example, the standard ultraviolet irradiance meter 7 is placed at the same position of the calibrated ultraviolet irradiance meter before calibration, and the first ultraviolet light source 21 in the middle calibration position passes through the precision diaphragm 3, the filter set 5 and the attenuation set 6 to independently generate an irradiance value as a standard value of the initial calibration point.
In one example, the precision diaphragm 3 is a primary precision diaphragm with precise scales, and is periodically calibrated according to the scale value by a metering mechanism.
In one example, by adjusting the precision diaphragm 3 and replacing the attenuation plate group 6, the irradiance generated by the first ultraviolet light source 21 passing through the precision diaphragm 3, the filter group 5 and the attenuation plate group 6 at the middle position in the calibration process is equal to the sum of the irradiance generated by the third ultraviolet light source 23 and the second ultraviolet light source 22 passing through the precision diaphragm 3, the filter group 5 and the attenuation plate group 6 at the front and rear positions.
In one example, by adjusting the precision diaphragm 3 and replacing the attenuation plate group 6, the radiation illuminance generated by the precision diaphragm 3, the filter group 5 and the attenuation plate group 6 passing through the front and rear positions in the calibration process is equal.
In one example, the measured values of the corrected ultraviolet irradiance values are in terms of 2, 22、23、24… … times the attenuation.
In one example, using a recordable value illumination intensity adjustment system, the measured value of the corrected ultraviolet irradiance value is 1/2, 1/22、1/23、1/24… … times the combined attenuation.
In one example, the casing of the ultraviolet light source 2 is designed to be a small-sized dark box, so that three ultraviolet light sources 2 can be prevented from interfering with each other, and the interference of stray light can be shielded, so that the accuracy and reliability of the traceability value can be ensured.
In one example, where filter set 5 is a narrow band filter, the spectral characteristics of filter set 5 are important because part of gas UV light source 2 has multiple light peak outputs. The filter set 5 used should transmit as far as possible only the monochromatic light selected, while the light of other wavelength bands, in particular the visible wavelength band, should be completely shielded.
In one example, the distance between the precision diaphragm 3 and the attenuation sheet group 6 is to ensure that the included angle between the connecting line from the center of the detection surface of the calibrated ultraviolet irradiance meter to the center of the small-hole imaging light source and the optical axis of the ultraviolet light source is not more than 15 degrees, so that the nonuniformity of the light intensity of the detection surface of the calibrated ultraviolet irradiance meter is lower than 5 percent.
The utility model has the advantages that:
(1) because the initial calibration point is a larger ultraviolet radiation illuminance value, the metering mechanism can trace the source according to JJG879-2002 ultraviolet radiation illuminance meter calibration procedures; the precise diaphragm (3) is a primary precise diaphragm with precise scales, and is calibrated by a metering mechanism according to the scales; the standard value of the ultraviolet irradiance is obtained by calculating the standard value of the initial calibration point, the transmissivity of the attenuation sheet group (6) (the calibration value of the metering mechanism) and the light-transmitting aperture (the calibration value of the metering mechanism) of the precision diaphragm (3), so that the traceability chain is complete.
(2) Because the measured value of the corrected ultraviolet irradiance value is 2 and 22、23、24… …, the problem that the ultraviolet irradiance meter cannot trace to the source due to the fact that the ultraviolet light source without a low-value standard ultraviolet irradiance meter and low-value radiant power cannot be solved.
(3) Because the precision diaphragm (3) is adjusted and the transmissivity of the attenuating plate group (6) is changed and the light-transmitting aperture of the precision diaphragm (3) is adjusted through the calibration process of the radiance values from high to low, the influence factor of the evaluation of the uncertainty of the low-value irradiance measurement of the ultraviolet irradiance meter is not increased compared with the evaluation of the uncertainty of the measurement of the higher radiance value of the ultraviolet irradiance meter with the perfect traceability chain.
(4) The adopted calibration equipment is less, and equipment such as an optical track and the like is absent, so that the operation is simple and the cost is low.
(5) Because the optical track is not needed, the device has small volume and can be carried to carry out field metering.
(6) Because the distance between the calibrated equipment and the standard light source is short and unchanged, the calibration error caused by the attenuation of the deep ultraviolet light in the air is avoided.
The above embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above embodiments are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (5)
1. A low-value calibration device of an ultraviolet irradiance meter is characterized by comprising an optical platform (1), three sets of calibration basic units positioned on the optical platform (1) and a standard ultraviolet irradiance meter (7);
each set of calibration basic unit comprises an ultraviolet light source (2), a precision diaphragm (3), a blind plate (4), a filter set (5) and an attenuation set (6) which are sequentially arranged on the same straight line;
the ultraviolet light sources (2) of the three sets of calibration basic units are respectively a first ultraviolet light source (21) positioned in the middle position, a second ultraviolet light source (22) positioned at the rear part and a third ultraviolet light source (23) positioned at the front part;
the three incoherent lights emitted by the ultraviolet light source (2) converge at the center of a standard ultraviolet irradiance meter (7) receiver after passing through a precision diaphragm (3), a filter set (5) and a attenuation sheet set (6), the calibrated ultraviolet irradiance meter is placed behind the attenuation sheet set (6) at the middle position, and the calibrated ultraviolet irradiance meter and the center of the attenuation sheet set (6) are on the same horizontal line.
2. The ultraviolet irradiance meter low value calibration device as claimed in claim 1, characterized in that the precision diaphragm (3) is a primary precision diaphragm with a precision scale.
3. The low-value calibration device of the ultraviolet irradiance meter, as recited in claim 1, characterized in that the ultraviolet light source (2) housing is designed as a small dark box.
4. The ultraviolet irradiance meter low value calibration device as recited in claim 1, characterized in that the filter set (5) is a narrow band filter.
5. The ultraviolet irradiance meter low value calibration device as claimed in claim 1, wherein an included angle between a connecting line from the center of the detection surface of the calibrated ultraviolet irradiance meter to the center of the pinhole imaging light source and the optical axis of the ultraviolet light source is not more than 15 °.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020507164.4U CN211978111U (en) | 2020-04-09 | 2020-04-09 | Low-value calibration device for ultraviolet irradiance meter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020507164.4U CN211978111U (en) | 2020-04-09 | 2020-04-09 | Low-value calibration device for ultraviolet irradiance meter |
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| CN211978111U true CN211978111U (en) | 2020-11-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113595627A (en) * | 2021-07-02 | 2021-11-02 | 中国电子技术标准化研究院 | Optical power calibration method based on space linear superposition principle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113595627A (en) * | 2021-07-02 | 2021-11-02 | 中国电子技术标准化研究院 | Optical power calibration method based on space linear superposition principle |
| CN113595627B (en) * | 2021-07-02 | 2022-05-17 | 中国电子技术标准化研究院 | Optical power calibration method based on space linear superposition principle |
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