CN112729782A - Bicycle light intensity simulation device and light intensity measurement method - Google Patents
Bicycle light intensity simulation device and light intensity measurement method Download PDFInfo
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- CN112729782A CN112729782A CN202011322752.1A CN202011322752A CN112729782A CN 112729782 A CN112729782 A CN 112729782A CN 202011322752 A CN202011322752 A CN 202011322752A CN 112729782 A CN112729782 A CN 112729782A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
- G01M11/06—Testing the alignment of vehicle headlight devices
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Abstract
The invention provides a bicycle light intensity simulation device and a light intensity measurement method, wherein the bicycle light intensity simulation device comprises a stabilized voltage power supply, a switch, an adjustable resistor, a lamp holder, a white lamp, a lampshade and a handheld illuminometer, the bottom of the lampshade is fixedly connected to the lamp holder, the white lamp is fixedly sleeved in the lampshade, a cable of the white lamp penetrates through the outer wall of the lampshade and is respectively connected with one end of the switch and one end of the adjustable resistor through cables, the other end of the switch is connected to the anode of the stabilized voltage power supply, and the other end of the adjustable resistor is connected to the cathode. The bicycle light intensity simulator and the bicycle light intensity measuring method can check and adjust the luminous intensity of the bicycle light simulator at any time, thereby meeting the requirements of laws and regulations on bicycle light and realizing the detection of the performance of the automatic headlamp of the vehicle.
Description
Technical Field
The invention belongs to the field of road tests of automobiles, and particularly relates to a bicycle light intensity simulation device and a light intensity measurement method.
Background
In recent years, the public demand for the front lighting performance of automobiles is increasing, and the quality of the lighting effect directly determines the driving safety. According to incomplete statistics, 60% of traffic accidents occur at night in the world, and the number of deaths caused by driving accidents at night in 2013 in China is 5 thousands of people, accounting for 50% of the total number of deaths caused by traffic accidents. As many traffic accidents occur at night, we have to mention the impact of car lighting on safe driving. Among many accidents caused by lighting reasons, accidents caused by the irregular use of high beam lights for oncoming vehicles account for a small percentage. When the opposite vehicle uses the high beam near, the driver's sight can be disturbed, the obstacle in front of the vehicle road can not be seen clearly during driving, and the vehicle can not be braked and avoided in time, resulting in accidents. In order to further improve the night front lighting performance of the automobile and improve the use habit of the high beam, especially for a novice driver, the automatic high beam technology is brought forward. The automatic high beam lamp can automatically control the switch of the high beam lamp according to the light condition, the running speed, the opposite direction and the front vehicle position, and the purpose is to avoid the interference of the sight of the opposite side due to the high beam light when approaching an opposite vehicle or other vehicles in the front, thereby improving the driving safety. The ece 48 "unified regulations on approval of vehicles in terms of installation of light and light signaling devices" standard specifies various test methods and conditions for automatic high beam performance testing, wherein a vehicle equipped with an automatic headlamp is specified to be able to recognize the light emitted by a bicycle approaching 75 meters across the vehicle, and the height, luminous intensity and luminous area of the bicycle lamp are specified. In the prior art, a light intensity detection plate behind a lens of a vehicle headlamp detector moves on a vertical plane on which a light beam is projected, and after the light intensity detection plate completely passes through a projection area of the light beam, data acquired by a plurality of photoelectric conversion elements linearly arranged on the light intensity detection plate reflects the light distribution condition of the whole light beam on the vertical plane, so that the light intensity of a high beam of the vehicle headlamp is accurately detected through the group of data. However, the structure is complex, a special luminous intensity conversion element is required to be used for directly measuring the luminous intensity of a luminous object, the cost is high, the operation and the carrying are inconvenient, and the device is not suitable for a road test. Therefore, it is necessary to develop a simulation apparatus for intensity of light of a bicycle lamp and a method for measuring intensity of light emitted by an illuminometer, which provide an effective solution for corresponding tests.
Disclosure of Invention
In view of the above, the present invention is directed to a light intensity simulator for a bicycle, which solves the problems of the prior art.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the utility model provides an analogue means for bicycle light intensity, including constant voltage power supply, a switch, adjustable resistance, the lighting fixture, the white lamp, lamp shade and handheld illuminometer, lamp shade bottom fixed connection to lighting fixture, the white lamp is cup jointed to the inside fixed lamp shade, the cable of white lamp passes the lamp shade outer wall and is connected with the one end of switch and adjustable resistance's one end cable respectively, the other end cable of switch is connected to the positive pole of constant voltage power supply, adjustable resistance's other end cable is connected to the negative pole of constant voltage power supply, and a switch, adjustable resistance and white lamp, the constant voltage power supply constitutes the electric loop in.
Further, the height range of the light emitting center of the white lamp from the ground is 0.8m +/-0.1 m.
Furthermore, the light-transmitting surface of the lampshade is rectangular.
Furthermore, the light-emitting area range of the lamp body consisting of the lampshade and the white lamp is 10cm2±0.3cm2The luminous intensity range is 150cd + -5 cd.
Further, the white lamp is an LED lamp.
Further, the handheld illuminometer is of type T-10A.
Compared with the prior art, the simulation device for the light intensity of the bicycle has the following advantages:
(1) the light intensity simulator for the bicycle is simple in structure and reasonable in design, and can be operated by a single person without changing a vehicle, and the simulator is convenient to install and operate.
(2) The bicycle light intensity simulation device has low requirements on equipment and a data processing system, has obvious advantages in cost, and is economical, practical and easy to popularize.
Another object of the present invention is to provide a method for measuring light intensity of a bicycle, which solves the disadvantages of the prior art.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a method for measuring light intensity of a bicycle, comprising the steps of:
s1: measuring the thickness H of the light receiving surface of the handheld illuminometer and the diameter D of the bottom end surface of the light receiving surface by using a vernier caliper, and placing a white lamp needing to measure the light intensity in a darkroom;
s2: pressing down a switch of the simulation device, switching on a voltage-stabilized power supply of the simulation device, and placing a handheld illuminometer at a position which is a distance L along the light-emitting direction of the white lamp;
s3: the method comprises the following steps of opening a handheld illuminometer, enabling a light receiving surface of the handheld illuminometer to face the direction of a light source, measuring the maximum illuminance value lx emitted by a light-emitting lamp body by the handheld illuminometer, and obtaining a luminous intensity formula of the white lamp body by calculation according to the principle that the luminous flux received by the spherical surface of a sensor of the handheld illuminometer is equal to the luminous flux emitted by the white lamp body at the corresponding spherical surface:
compared with the prior art, the method for measuring the light intensity of the bicycle has the following advantages:
(1) the method for measuring the light intensity of the bicycle can check and adjust the light intensity of the bicycle lamp simulation device at any time, can realize accurate simulation of the light intensity of the bicycle lamp and accurate measurement of the light intensity under the road state at night when being matched with the illuminometer for use, ensures that the light intensity is 150cd, thereby meeting the requirements of laws and regulations on the bicycle lamp light and realizing the detection of the automatic headlamp performance of the vehicle, and has the characteristics of high test accuracy and no need of changing the vehicle.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a light intensity simulator for a bicycle according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a method for measuring light intensity of a bicycle according to an embodiment of the present invention, wherein the method uses a light meter to measure the light intensity.
Description of reference numerals:
1-a regulated power supply; 2-a switch; 3-adjustable resistance; 4-a lamp holder; 5-white light; 6-lamp shade; 7-hand illuminometer.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1-2, a simulation device for bicycle light intensity, including constant voltage power supply 1, switch 2, adjustable resistance 3, lighting fixture 4, white lamp 5, lamp shade 6 and handheld illuminometer 7, 6 bottom fixed connections of lamp shade are to lighting fixture 4, 6 inside fixed cup joints white lamp 5 of lamp shade, the cable of white lamp 5 passes 6 outer walls of lamp shade and is connected with switch 2's one end and adjustable resistance 3's one end cable respectively, switch 2's other end cable is connected to constant voltage power supply 1's positive pole, adjustable resistance 3's other end cable is connected to constant voltage power supply 1's negative pole, and switch 2, adjustable resistance 3 and white lamp 5, constant voltage power supply 1 establishes ties and constitutes the electric loop.
The height range of the light-emitting center of the white lamp 5 from the ground is 0.8m +/-0.1 m, and in the embodiment, the height of the light-emitting center of the white lamp 5 from the ground can be 0.8m through reasonable matching of the heights of the lamp holder 4 and the lamp shade 6.
The light-transmitting surface of the lampshade 6 is rectangular, and in the embodiment, the worker selects the light-transmitting surface of the lampshade 6 to be rectangular with the length of 5 cm and the width of 2 cm.
The light-emitting area range of the lamp body consisting of the lampshade 6 and the white lamp 5 is 10cm2±0.3cm2The luminous intensity range is 150cd + -5 cd, in this embodiment, the luminous area of the lamp body composed of the lampshade 6 and the white lamp 5 selected by the operator is 10cm2The luminous intensity was 150 cd.
The white light 5 is an LED light, in this embodiment, under the condition that the switch 2 is closed, a worker can ensure that the working voltage of the white light 5 is 6.5V by adjusting the size of the adjustable resistor 3, and simultaneously the method in step S3 is used to monitor the light intensity of the white light 5 in real time until the light intensity emitted by the white light 5 is 150 cd.
As shown in FIG. 2, the hand-held illuminometer 7 is of a T-10A type, and in the present embodiment, the diameter D of the bottom cross section of the light receiving surface of the hand-held illuminometer 7 is 25.22 mm, and the thickness H is 7.28 mm.
A method for measuring light intensity of a bicycle, comprising the steps of:
s1: measuring the thickness H of the light receiving surface and the diameter D of the bottom end surface of the light receiving surface of the handheld illuminometer 7 by using a vernier caliper, and placing the white lamp 5 needing to measure the light intensity in a darkroom so as to avoid the influence of other external light sources;
s2: the switch 2 of the simulation device is pressed, the stabilized voltage power supply 1 of the simulation device is switched on, the handheld illuminometer 7 is placed at a distance L along the light emitting direction of the white lamp 5, and in the embodiment, a worker can measure the position L meters along the light emitting direction of the white lamp 5 by using a measuring tape;
s3: the handheld illuminometer 7 is turned on, the light receiving surface of the handheld illuminometer 7 faces the direction of the light source, the handheld illuminometer 7 is used for measuring the maximum illuminance lx emitted by the luminescent lamp body, and according to the principle that the luminous flux received by the spherical surface of the sensor of the handheld illuminometer 7 is equal to the luminous flux emitted by the lamp body of the white lamp 5 at the corresponding spherical surface degree, the luminous intensity formula of the lamp body of the white lamp 5 obtained by calculation is as follows:
in the embodiment, the worker measures the maximum illuminance lx emitted by the white lamp 5 at L meters by using the handheld illuminometer 7, and according to the principle that the luminous flux received by the spherical surface of the sensor of the handheld illuminometer 7 is equal to the luminous flux emitted by the white lamp 5 at the corresponding spherical surface, considering that the diameter D of the bottom section of the light receiving surface of the handheld illuminometer 7 is 25.22 mm and the thickness H is 7.28 mm, the calculated luminous intensity of the white lamp 5 is: x (cd) ═ 4 lx/3.
In addition, the worker can drive the vehicle provided with the automatic headlamp into a test site for testing at night, in the embodiment, a simulation device of the adjusted light intensity of the bicycle lamp is placed at a position at least 75 meters ahead of the vehicle, a stabilized voltage power supply 1 of the simulation device can be a mobile power supply or a power supply inside the automobile, a switch 2 of the simulation device is pressed to light the simulation device, the vehicle which starts the automatic headlamp faces the simulation device of the light intensity of the bicycle white lamp 5 at the speed of 80 +/-20 km/h to run, and whether the automatic headlamp is automatically turned off at a position at least 75 meters away from the simulation device of the light intensity of the bicycle white lamp 5 is checked.
As shown in fig. 2, wherein α is the sphericity of the light of the white lamp 5; the direction of the arrow is the direction of light emitted by the light source, and the hemispherical structure of the hand-held illuminometer 7 in fig. 2 is the light-receiving surface of the hand-held illuminometer 7.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A simulator for bicycle light intensity, characterized by: including constant voltage power supply (1), switch (2), adjustable resistor (3), lighting fixture (4), white lamp (5), lamp shade (6) and handheld illuminometer (7), lamp shade (6) bottom fixed connection to lighting fixture (4), lamp shade (6) inside fixed cup joint white lamp (5), the cable of white lamp (5) passes lamp shade (6) outer wall and is connected with the one end cable of the one end of switch (2) and adjustable resistor (3) respectively, the other end cable of switch (2) is connected to the anodal of constant voltage power supply (1), the other end cable of adjustable resistor (3) is connected to the negative pole of constant voltage power supply (1), and switch (2), adjustable resistor (3) and white lamp (5), constant voltage power supply (1) establishes ties and constitutes the electric circuit.
2. A simulator for the light intensity of a bicycle, as claimed in claim 1, wherein: the height range of the light-emitting center of the white lamp (5) from the ground is 0.8m +/-0.1 m.
3. A simulator for the light intensity of a bicycle, as claimed in claim 1, wherein: the light-transmitting surface of the lampshade (6) is rectangular.
4. A simulator for the light intensity of a bicycle, as claimed in claim 1, wherein: the light-emitting area range of the lamp body consisting of the lampshade (6) and the white lamp (5) is 10cm2±0.3cm2The luminous intensity range is 150cd + -5 cd.
5. A simulator for the light intensity of a bicycle, as claimed in claim 1, wherein: the white lamp (5) is an LED lamp.
6. A simulator for the light intensity of a bicycle, as claimed in claim 1, wherein: the handheld illuminometer (7) is of a type T-10A.
7. The method for measuring light intensity in a bicycle light intensity simulator according to any one of claims 1 to 6, wherein: the method comprises the following steps:
s1: measuring the thickness H of the light receiving surface and the diameter D of the bottom end surface of the light receiving surface of a handheld illuminometer (7) by using a vernier caliper, and placing a white lamp (5) needing to measure the light intensity in a darkroom;
s2: pressing a switch (2) of the simulation device, switching on a stabilized voltage supply (1) of the simulation device, and placing a handheld illuminometer (7) at a distance L along the light-emitting direction of a white lamp (5);
s3: the method comprises the following steps of turning on a handheld illuminometer (7), enabling a light receiving surface of the handheld illuminometer (7) to face the direction of a light source, measuring the maximum illuminance value lx emitted by a luminescent lamp body by the handheld illuminometer (7), and obtaining the luminous intensity formula of the lamp body of the white lamp (5) by calculation according to the principle that the luminous flux received by the spherical surface of a sensor of the handheld illuminometer (7) is equal to the luminous flux emitted by the lamp body of the white lamp (5) at the corresponding spherical surface:
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| CN202011322752.1A CN112729782A (en) | 2020-11-23 | 2020-11-23 | Bicycle light intensity simulation device and light intensity measurement method |
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| CN202011322752.1A CN112729782A (en) | 2020-11-23 | 2020-11-23 | Bicycle light intensity simulation device and light intensity measurement method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2076174A (en) * | 1980-05-07 | 1981-11-25 | Ni Ex I Avtomobil Elektroobor | Testing Vehicle Head Lamps of Transport Vehicles and a Device for Carrying Same into Effect |
| CN201173858Y (en) * | 2008-03-20 | 2008-12-31 | 凌铭 | Plane mobile vehicle lamp light distribution detection device |
| CN101562932A (en) * | 2009-05-07 | 2009-10-21 | 董学文 | Colorless bleaching LED linearity light adjusting system based on PFM |
| CN204669694U (en) * | 2015-06-10 | 2015-09-23 | 衢州立诺电子科技有限公司 | A kind of intelligent lighting system |
| CN211954685U (en) * | 2020-04-21 | 2020-11-17 | 特路（北京）科技有限公司 | Automatic drive vehicle backlight test field |
-
2020
- 2020-11-23 CN CN202011322752.1A patent/CN112729782A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2076174A (en) * | 1980-05-07 | 1981-11-25 | Ni Ex I Avtomobil Elektroobor | Testing Vehicle Head Lamps of Transport Vehicles and a Device for Carrying Same into Effect |
| CN201173858Y (en) * | 2008-03-20 | 2008-12-31 | 凌铭 | Plane mobile vehicle lamp light distribution detection device |
| CN101562932A (en) * | 2009-05-07 | 2009-10-21 | 董学文 | Colorless bleaching LED linearity light adjusting system based on PFM |
| CN204669694U (en) * | 2015-06-10 | 2015-09-23 | 衢州立诺电子科技有限公司 | A kind of intelligent lighting system |
| CN211954685U (en) * | 2020-04-21 | 2020-11-17 | 特路（北京）科技有限公司 | Automatic drive vehicle backlight test field |
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Application publication date: 20210430 |