Chromaticity measuring device for reflector of electric bicycle

Abstract

An electric bicycle reflector chromaticity measuring device belongs to the field of inspection equipment, and utilizes a light source A (1) and a collimation light system (2) of optical performance test system equipment, a collimation light beam on an optical axis is projected to a spectroscope (3), the spectroscope (3) is installed on the optical axis at an angle of 45 degrees, and the collimation light beam passes through the spectroscope (3) and is projected on a reflector (6) along the optical axis direction. And the angle turntable (5) is used for adjusting the incident angle of the reflector (6). The light beam reflected by the reflector (6) and returned along the original path is projected on the spectroscope (3), the spectroscope (3) projects the light beam with the optical axis forming a 90-degree angle to the colorimeter (4) for chromaticity measurement, and the observation angle between the installation position of the colorimeter (4) and the center line of the optical axis of the spectroscope (3) is 0.2 degree. And judging a test result according to a chromaticity coordinate value by adopting a template point tracing method.

Description

Technical Field

[0001] The invention relates to the field of electric bicycle testing equipment. Background Art

[0002] The chromaticity of the reflector is an important test item in GB / T 31887.2--2019 "Bicycle lighting and retro-reflective devices Part 2: Retro-reflective devices". The standard requires that the chromaticity test be measured by instrumental measurement, and the chromaticity coordinates should be measured by a spectrometer or colorimeter under the conditions of a = 0°20' and β = 5°. The test piece should be illuminated with CIE standard light source A. After the test, check whether it meets the requirements of the standard chromaticity coordinates.

[0003] The national standard has requirements for the chromaticity coordinates of the reflectors of electric bicycles, because the optical performance of the reflector is closely related to its chromaticity. The color of the reflector is divided into white for the front reflector, red for the rear reflector, yellow or amber for the side reflector, and yellow for the pedal reflector. The reflector is a light receiving and reflecting device, which is very important in traffic safety and protecting the safety of riders. Its chromaticity index directly affects the optical performance of the reflector.

[0004] Checking the chromaticity of a reflector is an important indicator for evaluating its quality and performance, especially in the production process where strict control is required. The test method must be simple, fast, economical, and accurate.

[0005] GB / T 31887.2--2019 "Bicycle lighting and retro-reflective devices Part 2: Retro-reflective devices" is basically equivalent to ISO6742-2:2015.

[0006] The current situation is that the equipment for testing the chromaticity of reflectors is expensive and the purchase cost is high. Due to the national standard requirements for the observation angle, incident angle A light source for testing chromaticity, direct measurement with a colorimeter cannot meet the standard requirements. For this reason, we developed the chromaticity measurement of electric bicycle reflectors, using the A light source of the optical performance test system equipment, a spectroscope, a colorimeter, and an angle turntable to form a reflector chromaticity test system, and the chromaticity coordinate value uses the template point method to determine the test results.

[0007] The development of this project plays a demonstration and leading role for electric bicycle testing agencies and manufacturers. The device uses the A light source and collimated light system of the optical performance testing system equipment to measure colorimetry. It has a clever design, small size, low equipment manufacturing cost, and is easy to popularize and apply, meeting the requirements of the standards and the needs of testing agencies. Summary of the invention

[0008] The technical problems to be solved by the present invention are:

[0009] The chromaticity measurement of the electric bicycle reflector uses the A light source and collimated light system of the optical performance test system, a spectroscope (semi-transparent and semi-reflective lens), a colorimeter, and an angle turntable to form a reflector chromaticity test system. The chromaticity coordinate value uses the template point drawing method to determine the test result.

[0010] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: the above-mentioned electric bicycle reflector chromaticity measuring device belongs to the field of inspection equipment, and uses the A light source (1) and the collimated light system (2) of the optical performance testing system equipment, the collimated light beam on the optical axis is projected to the beam splitter (3), the beam splitter (3) is installed on the optical axis at an angle of 45°, the collimated light beam passes through the beam splitter (3), and is projected on the reflector (6) along the optical axis, and the angle turntable (5) is used to adjust the incident angle of the reflector (6). The light beam reflected by the reflector (6) is projected on the beam splitter (3), and the beam splitter (3) projects the light beam with an optical axis at an angle of 90° to the colorimeter (4) to measure the chromaticity, wherein the observation angle between the installation position of the colorimeter (4) and the center line of the optical axis of the beam splitter (3) is 0.2°, and the coordinate value of the chromaticity adopts the template point drawing method to determine the test result. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0012] Attached Figure 1 Description: The embodiment of the electric bicycle reflector chromaticity measuring device shown belongs to the field of inspection equipment. The A light source (1) and the collimated light system (2) of the optical performance testing system equipment are used. The collimated light beam on the optical axis is projected onto the beam splitter (3). The beam splitter (3) is installed on the optical axis at an angle of 45°. The collimated light beam passes through the beam splitter (3) and is projected onto the reflector (6) along the optical axis. The angle turntable (5) is used to adjust the incident angle of the reflector (6). The light beam reflected by the reflector (6) is projected onto the beam splitter (3). The beam splitter (3) projects the light beam with an optical axis at an angle of 90° onto the colorimeter (4) to measure the chromaticity. The observation angle between the installation position of the colorimeter (4) and the center line of the optical axis of the beam splitter (3) is 0.2°. The coordinate value of the chromaticity adopts the template point drawing method to determine the test result. DETAILED DESCRIPTION

[0013] The invention discloses a colorimetric measuring device for a reflector of an electric bicycle, belonging to the field of inspection equipment. The device uses an A light source (1) and a collimated light system (2) of an optical performance testing system. A collimated light beam on an optical axis is projected onto a beam splitter (3). The beam splitter (3) is installed on the optical axis at an angle of 45 degrees. The collimated light beam passes through the beam splitter (3) and is projected onto a reflector (6) along the optical axis. An angle turntable (5) is used to adjust the incident angle of the reflector (6). The light beam reflected by the reflector (6) and returned along the original path is projected onto the beam splitter (3). The beam splitter (3) projects a light beam with an optical axis at an angle of 90 degrees onto a colorimeter (4) to perform colorimetric measurement. The observation angle between the installation position of the colorimeter (4) and the center line of the optical axis of the beam splitter (3) is 0.2 degrees. The coordinate value of the colorimetric value is determined by a template point drawing method to determine the test result.

[0014] The beneficial effects of the present invention are: realizing the chromaticity measurement of the reflector of an electric bicycle, meeting the standard requirements of GB / T 31887.2--2019 "Bicycle Lighting and Retroreflective Devices Part 2: Retroreflective Devices".

[0015] The development of this project plays a demonstration and leading role for electric bicycle testing agencies and manufacturers across the country. The device uses the A light source and collimated light system of the optical performance testing system equipment to measure colorimetry. It has a clever design, small size, low equipment manufacturing cost, and is easy to popularize and apply, meeting the requirements of the standards and the needs of testing agencies.

[0016] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An electric bicycle reflector chromaticity measurement device, characterized in that The reflector chromaticity test system is composed of an A light source and a collimated light system, a beam splitter, a reflector, an angle turntable and a colorimeter. The A light source (1) and the collimated light system (2) of the optical performance test system equipment are used. The collimated light beam on the optical axis is projected onto the beam splitter (3). The beam splitter (3) is installed on the optical axis at an angle of 45 degrees. The collimated light beam passes through the beam splitter (3) and is projected onto the reflector (6) along the optical axis. The light beam reflected by the reflector (6) and returned along the original path is projected onto the beam splitter (3). The beam splitter (3) projects the light beam with an optical axis at an angle of 90 degrees to the colorimeter (4) to measure the chromaticity. The observation angle between the light receiving position of the colorimeter (4) and the center line of the optical axis of the beam splitter (3) is 0.2 degrees. The coordinate value of the chromaticity adopts the template point drawing method to determine the test result. The angle turntable (5) is used to adjust the incident angle of the reflector (6).

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