CN211504399U - Optical power density test system of lighting equipment for explosive environment - Google Patents
Optical power density test system of lighting equipment for explosive environment Download PDFInfo
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- CN211504399U CN211504399U CN202020348923.7U CN202020348923U CN211504399U CN 211504399 U CN211504399 U CN 211504399U CN 202020348923 U CN202020348923 U CN 202020348923U CN 211504399 U CN211504399 U CN 211504399U
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Abstract
The utility model relates to an explosive environment is with lighting apparatus's optical power density test system, include: a light intensity distribution test unit and a light power density test unit; the light intensity distribution testing unit is used for testing the light intensity distribution of the lighting equipment to be tested and determining the position of the maximum light intensity; the optical power density testing unit comprises a field diaphragm and a thermosensitive optical power densitometer; the field diaphragm is used for limiting the light radiation area of the lighting equipment to be tested; the thermosensitive optical power densitometer is used for testing the optical power density value of the optical section. The utility model discloses a wavelength range that temperature sensing formula optical power meter can detect is wider, when can gathering the light radiation, compromises the influence of lamps and lanterns heat radiation, actual conditions when simulating the lamps and lanterns illumination agrees with the mechanism that the light radiation ignites the explosive environment to judge the light radiation security performance of lamps and lanterns more rationally.
Description
Technical Field
The utility model relates to an explosion-proof technical field of illumination especially relates to an explosive for environment lighting apparatus's optical power density test system.
Background
With the rapid development of economy in China, the requirements of industries such as coal, petroleum, chemical industry and the like on safety production are higher and higher, and some flammable and explosive places need good illumination to ensure normal production activities, so that the use of an anti-explosion lamp is particularly important, the problem of light radiation safety of the anti-explosion lamp is emphasized, and the anti-explosion lamp becomes a consensus around the world. At present, ATEX and IECEx have performed optical radiation detection on part of LED lamps, but domestic explosion-proof certification is still exploring optical radiation detection.
According to the IEC60079-28 standard, there are four ignition mechanisms for light radiation:
(1) after absorption by the object surface or particles, the light radiation raises its temperature, which under certain conditions raises the temperature of the irradiated surface or particles to a level sufficient to ignite the surrounding explosive environment.
(2) When the wavelength of the radiant wave matches the absorption band of the combustible gas, thermal ignition of a volume of combustible gas can occur.
(3) In the presence of intense ultraviolet radiation, the ultraviolet light can photolyze oxygen molecules, forming photochemical ignitions.
(4) High energy direct lasers cause decomposition of the gas or vapor, producing shock waves and plasma, both of which form the ignition source.
In practical conditions, the most probable occurrence of ignition is the (1) th case of the lowest ignition capability of the radiant energy, and therefore, in the standard of IEC60079-28, only the effects of equipment surfaces, airborne dust and intense light focusing on solid materials are considered, and three types of explosion protection are used to prevent ignition by light radiation in potentially explosive environments: intrinsic safety type optical radiation, protective type optical radiation, and interlock device type optical systems. From the safety perspective, the explosion-proof safety performance of the optical radiation device is examined, and the optical radiation testing device becomes the research direction of many students.
The measurement of optical radiation may be selected based on whether optical fibers are used as the transmission medium, or in lighting applications, an optical irradiance test is used. The illumination equipment in an explosive environment needs to adopt safe irradiation on the premise of ensuring clear view field. The existing light radiation measuring methods are an integrating sphere, a distributed photometer and the like, do not consider the (1) case of a light radiation ignition mechanism, only measure the luminous flux on a specific irradiation surface, and ignore the thermal effect of the lighting device.
SUMMERY OF THE UTILITY MODEL
Only measure the luminous flux on specific irradiation face to prior art existence, neglected the problem of lighting apparatus's thermal effect, the utility model provides a lighting apparatus's for explosive environment luminous power density test system and system.
The specific scheme of the application is as follows:
an optical power density testing system of a lighting device for explosive environments, comprising: a light intensity distribution test unit and a light power density test unit; the light intensity distribution testing unit is used for testing the light intensity distribution of the lighting equipment to be tested and determining the position of the maximum light intensity; the optical power density testing unit comprises a field diaphragm and a thermosensitive optical power densitometer; the field diaphragm is used for limiting the light radiation area of the lighting equipment to be tested; the thermosensitive optical power densitometer is used for testing the optical power density value of the optical section; the illumination device to be tested, the field diaphragm and the thermosensitive optical power densitometer are sequentially arranged on the same horizontal axis.
Preferably, the light intensity distribution test unit is further configured to measure a light distribution curve of the illumination device to be tested; and finding out the maximum light intensity according to the light distribution curve, and marking the position direction corresponding to the maximum light intensity to obtain the position of the maximum light intensity.
Preferably, the light intensity distribution test unit includes: the device comprises a lighting device to be tested, a reflector, a first diaphragm and a photoelectric probe; light output by the illumination device to be detected reaches the first diaphragm after being reflected by the reflector, and the light passing through the first diaphragm is collected by the photoelectric probe.
Preferably, the method further comprises the following steps: a black patch; the black patch is used for carrying out light intensity distribution test after covering the position of the maximum light intensity, and if the position of the maximum light intensity disappears, the position of the patch is the position of the maximum light intensity.
Preferably, the lighting device to be tested is a lamp, and the lamp is in an explosive environment.
Compared with the prior art, the utility model discloses following beneficial effect has:
1) the utility model discloses an adopt distributed light intensity test unit, after obtaining lamps and lanterns grading curve, can find the position direction of maximum light intensity place fast.
2) The utility model discloses a field of view diaphragm cooperation heat-sensitive optical power meter, the big or small developments of field of view diaphragm are adjustable, can restrict the light radiation area, eliminate stray light's influence among the test environment. The wavelength range that the thermosensitive optical power meter can detect is wider, can gather the ray radiation, gives consideration to the influence of lamps and lanterns heat radiation simultaneously, and the actual conditions when the simulation lamps and lanterns are lighted agree with the mechanism that the ray radiation ignites the explosive environment to judge the ray radiation security performance of lamps and lanterns more rationally.
Drawings
Fig. 1 is a schematic flow chart of a method for testing optical power density of an illumination device for explosive environment according to the present invention.
Fig. 2 is the structural schematic diagram of the distributed light intensity testing system of the present invention.
Fig. 3 is a diagram of the light intensity distribution test result of the lamp of the present invention.
FIG. 4 is a schematic structural diagram of an optical power density testing system of the present invention
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
Referring to fig. 2 and 4, an optical power density test system of an illumination device for explosive environment includes: a light intensity distribution test unit and a light power density test unit; the light intensity distribution testing unit is used for testing the light intensity distribution of the lighting equipment 11(21) to be tested and determining the position of the maximum light intensity; the optical power density testing unit comprises a field diaphragm 22 and a thermosensitive optical power densitometer 23; the field diaphragm 22 is used for limiting the light radiation area of the lighting device 11 to be tested; the heat-sensitive optical power densitometer 23 is used for testing the optical power density value of the optical section; the lighting device 11 to be tested, the field diaphragm 22 and the heat-sensitive optical power densitometer 23 are sequentially arranged on the same horizontal axis.
Referring to fig. 1, an optical power density testing method for an illumination device for explosive environments based on the optical power density testing system includes:
s1, testing the light intensity distribution of the lighting device 11 to be tested, and determining the maximum light intensity position; in this embodiment, the lighting device 11 to be tested is a lamp, and the lamp is in an explosive environment. Specifically, step S1 includes:
s11, measuring the light distribution curve of the lighting device 11 to be measured by using the light intensity distribution test unit; the light beams of the common lamps are diffused outwards, and the light distribution curve of the lamps is obtained by using the light intensity distribution test unit. Referring to fig. 2, the light intensity distribution test unit includes: the device comprises a lighting device to be tested 11, a reflective mirror 12, a first diaphragm 13 and a photoelectric probe 14; light output by the illumination device 11 to be measured reaches the first diaphragm 13 after being reflected by the reflective mirror 12, and the light passing through the first diaphragm 13 is collected by the photoelectric probe 14. In the present embodiment, the photoelectric probe 14 is a vertical photometer from Hangzhou Zhejiang tricolor instruments, Inc.
And S12, finding out the maximum light intensity according to the light distribution curve, and marking the position direction corresponding to the maximum light intensity to obtain the position of the maximum light intensity. Step S12 further includes: verifying the maximum light intensity position; the verifying the maximum light intensity position includes: and after the position of the maximum light intensity is shielded, carrying out light intensity distribution test, and if the position of the maximum light intensity disappears, setting the position of the patch as the position of the maximum light intensity. The step of masking the location of maximum light intensity comprises: the location of maximum light intensity is masked with a black patch. The test results are shown in fig. 3. The maximum light intensity position of the lamp is in the center of the lamp. And covering the center of the lamp by using a black patch with the diameter of 20mm, then carrying out light intensity distribution test, and if the position of the maximum light intensity disappears, setting the position of the black patch as the position of the maximum light intensity. After verifying the maximum light intensity position, the next step of testing is carried out.
S2, the maximum optical power density of the lighting device 11 under test is tested. Specifically, step S2 includes:
s21, determining the position corresponding to the maximum light intensity position on the light-emitting surface of the lighting device 11 to be tested;
s22, placing the field diaphragm 22 at the corresponding position to limit the light radiation area, placing the thermal-sensitive optical power densitometer 23 behind the field diaphragm 22, and measuring the optical power density value of the optical section at the corresponding position, namely the maximum optical power density of the lighting device 11 to be tested by the thermal-sensitive optical power densitometer 23.
Referring to fig. 4, the field stop 22 is placed at a corresponding position, the size of the field stop 22 is adjusted, and then the heat-sensitive optical power meter is placed against the stop. According to standard IEC60079-28, the light source area is more than 400mm2Judging whether the explosion-proof requirement is met or not by corresponding temperature groups, so that the measuring method only aims at the area less than or equal to 400mm2The light source of (1). During measurement, the size of the field diaphragm 22 is adjusted according to the effective measurement area of the thermal sensitive optical power meter, so that all light beams passing through the field diaphragm 22 are collected by the thermal sensitive optical power meter, the optical power density is calculated according to the area of the aperture of the field diaphragm 22, and whether the explosion-proof requirement is met is judged according to the standard.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (5)
1. An optical power density testing system for an illumination device for explosive environments, comprising: a light intensity distribution test unit and a light power density test unit;
the light intensity distribution testing unit is used for testing the light intensity distribution of the lighting equipment to be tested and determining the position of the maximum light intensity;
the optical power density testing unit comprises a field diaphragm and a thermosensitive optical power densitometer;
the field diaphragm is used for limiting the light radiation area of the lighting equipment to be tested;
the thermosensitive optical power densitometer is used for testing the optical power density value of the optical section;
the illumination device to be tested, the field diaphragm and the thermosensitive optical power densitometer are sequentially arranged on the same horizontal axis.
2. The optical power density testing system of the illumination device for explosive environment as claimed in claim 1, wherein said light intensity distribution testing unit is further configured to measure a light distribution curve of the illumination device to be tested; and finding out the maximum light intensity according to the light distribution curve, and marking the position direction corresponding to the maximum light intensity to obtain the position of the maximum light intensity.
3. The optical power density test system for an illumination apparatus for an explosive environment according to claim 1, wherein said light intensity distribution test unit comprises: the device comprises a lighting device to be tested, a reflector, a first diaphragm and a photoelectric probe;
light output by the illumination device to be detected reaches the first diaphragm after being reflected by the reflector, and the light passing through the first diaphragm is collected by the photoelectric probe.
4. The optical power density testing system of the lighting device for explosive environment according to claim 1, further comprising: a black patch;
the black patch is used for carrying out light intensity distribution test after covering the position of the maximum light intensity, and if the position of the maximum light intensity disappears, the position of the patch is the position of the maximum light intensity.
5. The optical power density testing system for the lighting device for explosive environment as claimed in claim 1, wherein the lighting device to be tested is a lamp, and the lamp is in explosive environment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020348923.7U CN211504399U (en) | 2020-03-19 | 2020-03-19 | Optical power density test system of lighting equipment for explosive environment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020348923.7U CN211504399U (en) | 2020-03-19 | 2020-03-19 | Optical power density test system of lighting equipment for explosive environment |
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| Publication Number | Publication Date |
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| CN211504399U true CN211504399U (en) | 2020-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020348923.7U Active CN211504399U (en) | 2020-03-19 | 2020-03-19 | Optical power density test system of lighting equipment for explosive environment |
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| CN (1) | CN211504399U (en) |
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- 2020-03-19 CN CN202020348923.7U patent/CN211504399U/en active Active
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Effective date of registration: 20240622 Address after: 510663 No.9, Keke Road, Huangpu District, Guangzhou City, Guangdong Province Patentee after: Guangzhou Special Equipment Testing and Research Institute (Guangzhou Special Equipment Accident Investigation Technology Center Guangzhou Elevator Safety Operation Monitoring Center) Country or region after: China Address before: 6 / F, Liurong building, 65 Liurong Road, Guangzhou, Guangdong 510180 Patentee before: GUANGZHOU ACADEMY OF SPECIAL EQUIPMENT INSPECTION & TESTING Country or region before: China |