CN105388129A - Road surface relative reflectivity testing device - Google Patents

Road surface relative reflectivity testing device Download PDF

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Publication number
CN105388129A
CN105388129A CN201510675141.8A CN201510675141A CN105388129A CN 105388129 A CN105388129 A CN 105388129A CN 201510675141 A CN201510675141 A CN 201510675141A CN 105388129 A CN105388129 A CN 105388129A
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CN
China
Prior art keywords
road surface
reflectivity
light source
reflecting glass
illuminometer
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CN201510675141.8A
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Chinese (zh)
Inventor
赵海天
赖冠华
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Shenzhen University
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Shenzhen University
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Priority to CN201510675141.8A priority Critical patent/CN105388129A/en
Publication of CN105388129A publication Critical patent/CN105388129A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/55—Specular reflectivity

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

The invention is suitable for the technical field of testing devices, and provides a road surface relative reflectivity testing device. The road surface relative reflectivity testing device comprises a light source, first reflecting glass, second reflecting glass and an illuminance meter in the light path direction; incident light sent by the light source irradiates to the road surface according to a preset angle after being reflected by the first reflecting glass and is reflected by the second reflecting glass after being reflected by the road surface, a reflected light ray enters the illuminance meter, and the road surface reflectivity Ta is obtained according to a read of the illuminance meter; the incident light sent by the light source irradiates to a horizontal mirror placed on the road surface according to a preset angle after being reflected by the first reflecting glass and is reflected by the second reflecting glass after being reflected by the mirror, a reflected light ray enters the illuminance meter, and the mirror reflectivity Tmax is obtained according to a read of the illuminance meter; the road surface relative reflectivity Ti is calculated according to the road surface reflectivity Ta and the mirror reflectivity Tmax. The road surface relative reflectivity testing device is small in size and capable of rapidly measuring the relative reflectivity.

Description

A kind of road surface relative reflectance proving installation
Technical field
The invention belongs to proving installation technical field, particularly relate to a kind of road surface relative reflectance proving installation.
Background technology
When test road reflection rate, according to road lighting test specification, brightness imager with observation station apart from 60 meters, then should calculate brightness imager observation sight line and road surface angle 1 degree; Light fixture and the observation station distance of low lamp position reverse illumination are 30 meters, and draw the light of low lamp position lamp and the angle 2 degree on road surface as calculated, test segment always reaches 90 meters.Obviously, such test site is too large, needs night as test condition simultaneously, cannot realize quick test during test.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of small size, be easy to carry, and can measure the device of relative reflectance fast.
The present invention is achieved in that a kind of road surface relative reflectance proving installation, and described device comprises light source, the first reflecting glass, the second reflecting glass, illuminometer along optical path direction;
The incident light that described light source sends shines to road surface with predetermined angle after described first reflecting glass reflection, and after road reflection, through described second reflecting glass reflection, reflection ray enters illuminometer, obtains the reflectivity Ta on road surface according to the reading of described illuminometer;
The incident light that described light source sends shines to the horizontal minute surface being placed on upper pavement surface with predetermined angle after described first reflecting glass reflection, after mirror-reflection, through described second reflecting glass reflection, reflection ray enters illuminometer, obtains the reflectivity Tmax of minute surface according to the reading of described illuminometer;
The relative reflectance T on road surface is calculated according to the reflectivity Ta on road surface and the reflectivity Tmax of minute surface i, described relative reflectance T i=Ta/Tmax (i=1,2,3 ...).
Further, the default angle on described incident light and road surface is 2 degree, and the angle on described reflected light and road surface is 1 degree.
Further, described upper pavement surface arranges one piece of central dividing plate between described light source and described illuminometer, and for isolating direct projection veiling glare, the reflected light of described road surface or horizontal minute surface is passed through by the bottom of described central dividing plate.
Further, the length of described proving installation is 0.75 meter.
Further, described light source is LED light source.
Compared with prior art, beneficial effect is in the present invention: the proving installation of road surface provided by the invention relative reflectance, and on the one hand, volume is little, hand-holdablely carries, and test can be carried out in little space; On the other hand, test simple and convenient, can rapid results, be particularly useful for the material surface reflectance test that area is large.
Accompanying drawing explanation
Fig. 1 is the traditional test device of the road surface relative reflectance that prior art provides;
Wherein, lighting system is reverse illumination; In addition, 1, the light fixture of low lamp position reverse illumination, 2, brightness imager, 3, observation station is tested, 4, the light of low lamp position reverse illumination light fixture and the angle 2 degree on road surface, 5, the observation of brightness imager sight line and road surface angle 1 degree, 6, light fixture and the distance 30 meters of testing observation station of low lamp position reverse illumination, 7, the distance 60 meters of brightness imager and test observation station, 24, road surface;
Fig. 2 is a kind of proving installation of the road surface relative reflectance that first embodiment of the invention provides;
Wherein, lighting system is reverse illumination; In addition, 8, light source, 9, illuminometer, 10, central dividing plate, 11, the distance on central dividing plate bottom and ground, 12, the light of LED light source and the angle 2 degree on road surface, 13, illuminometer observation sight line and road surface angle 1 degree, 14, proving installation length 2 meters, 24, road surface;
Fig. 3 is the proving installation of the another kind of road surface relative reflectance that second embodiment of the invention provides;
Wherein, lighting system is reverse illumination; In addition, 15, light source, 16, illuminometer, 17, central dividing plate, the 18, first reflecting glass, 19, the second reflecting glass, 20, the distance on central dividing plate bottom and ground, 21, the light of LED light source and the angle 2 degree on road surface, 22, illuminometer observation sight line and road surface angle 1 degree, 23, proving installation length 0.75 meter, 24, road surface.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The proving installation of road surface provided by the invention relative reflectance, under the prerequisite that maintenance is identical with light reflection angle with the light angle of traditional measuring instrument, makes test can carry out in little space.The present invention improves based on following proving installation:
The proving installation of the road surface relative reflectance that first embodiment of the invention provides, as shown in Figure 2, described device comprises along optical path direction: light source 8, illuminometer 9;
The incident light that described light source 8 sends according to road surface with the angle with 2 degree, road surface, after road reflection (angle on reflected light and road surface is 1 degree), enters illuminometer 9, obtains the reflectivity Ta on road surface according to the reading of described illuminometer 9 0;
The incident light that described light source 8 sends is to shine to the horizontal minute surface being placed on upper pavement surface with the angle on 2 degree, road surface, after mirror-reflection (angle on reflected light and road surface is 1 degree), enter illuminometer 9, obtain the reflectivity Tmax of minute surface according to the reading of described illuminometer 9 0;
According to the reflectivity Ta on road surface 0with the reflectivity Tmax of minute surface 0calculate the relative reflectance T on road surface i, described relative reflectance T i=Ta 0/ Tmax 0(i=1,2,3 ...).
Although the proving installation of above-mentioned road surface relative reflectance reduces the volume of instrument greatly, length is still very long, reaches 2 meters, is greater than boarding and allows size, be unfavorable for carrying, still need to reduce length and volume further.
Under the condition that guarantee light angle, reflection angle neither become, according to minute surface emission principle, the second embodiment devises the proving installation of another kind of road surface relative reflectance, as shown in Figure 3; Introduce the structure composition and working principle of the proving installation of this road surface relative reflectance below in detail:
Described device comprises light source 15, first reflecting glass 18, second reflecting glass 19, illuminometer 16 along optical path direction;
The incident light that described light source 15 sends after described first reflecting glass 18 reflects with the angle on 2 degree, road surface photograph to road surface, after road reflection (angle on reflected light and road surface is 1 degree), reflect through described second reflecting glass 19, reflection ray enters illuminometer 16, obtains the reflectivity Ta on road surface according to the reading of described illuminometer 16;
The incident light that described light source 15 sends after described first reflecting glass 18 reflects with the angle on 2 degree, road surface photograph to the horizontal minute surface being placed on upper pavement surface, after mirror-reflection (angle on reflected light and road surface is 1 degree), reflect through described second reflecting glass 19, reflection ray enters illuminometer 16, obtains the reflectivity Tmax of minute surface according to the reading of described illuminometer 16;
The relative reflectance T on road surface is calculated according to the reflectivity Ta on road surface and the reflectivity Tmax of minute surface i, described relative reflectance T i=Ta/Tmax (i=1,2,3 ...).
After improving, the length of described proving installation is 0.75 meter; Instrument is totally-enclosed, meets boarding demand.
In addition, described upper pavement surface is provided with one piece of central dividing plate between described light source and described illuminometer, ensure that the distance on central dividing plate bottom and road surface is as far as possible little simultaneously, the reflected light of described road surface or horizontal minute surface is passed through by the bottom of described central dividing plate, and such operation effectively eliminates the impact of direct projection veiling glare.
Described light source is high-level efficiency low-power LED light source.
In fact, the road surface relative emissivity that proving installation provided by the invention is mainly applicable under large incident angle condition detects, and the angle on incident ray and road surface is because ensureing between 1 degree to 3 degree.
The proving installation of road surface provided by the invention relative reflectance, on the one hand, after calculating relative reflectance, can compare the reflectivity relative value on unlike material road surface; On the other hand, proving installation volume is little, hand-holdablely carries, and test can be carried out in little space, does not need the road surface test site of 90 meters; Do not need night as test condition, test simple and convenient yet, can rapid results, be particularly useful for the material surface reflectance test that area is large; In addition, proving installation is totally-enclosed, and size also meets boarding requirement.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.

Claims (5)

1. a road surface relative reflectance proving installation, is characterized in that, described device comprises light source, the first reflecting glass, the second reflecting glass, illuminometer along optical path direction;
The incident light that described light source sends shines to road surface with predetermined angle after described first reflecting glass reflection, and after road reflection, through described second reflecting glass reflection, reflection ray enters illuminometer, obtains the reflectivity Ta on road surface according to the reading of described illuminometer;
The incident light that described light source sends shines to the horizontal minute surface being placed on upper pavement surface with predetermined angle after described first reflecting glass reflection, after mirror-reflection, through described second reflecting glass reflection, reflection ray enters illuminometer, obtains the reflectivity Tmax of minute surface according to the reading of described illuminometer;
The relative reflectance T on road surface is calculated according to the reflectivity Ta on road surface and the reflectivity Tmax of minute surface i, described relative reflectance T i=Ta/Tmax (i=1,2,3 ...).
2. road surface as claimed in claim 1 relative reflectance proving installation, it is characterized in that, the default angle on described incident light and road surface is 2 degree, and the angle on described reflected light and road surface is 1 degree.
3. road surface as claimed in claim 1 relative reflectance proving installation, it is characterized in that, described upper pavement surface arranges one piece of central dividing plate between described light source and described illuminometer, for isolating direct projection veiling glare, the reflected light of described road surface or horizontal minute surface is passed through by the bottom of described central dividing plate.
4. road surface as claimed in claim 1 relative reflectance proving installation, it is characterized in that, the length of described proving installation is 0.75 meter.
5. road surface as claimed in claim 1 relative reflectance proving installation, it is characterized in that, described light source is LED light source.
CN201510675141.8A 2015-10-16 2015-10-16 Road surface relative reflectivity testing device Pending CN105388129A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105928908A (en) * 2016-04-28 2016-09-07 广西大学 Method and device for measuring material surface reflectivity

Citations (19)

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SE467757B (en) * 1989-09-18 1992-09-07 Volvo Ab Method for optical surface inspection
DE4137673A1 (en) * 1991-11-15 1993-05-19 Siemens Ag Grazing X=ray reflectometer for rapid diffraction investigations - enabling surface property and thin film thickness determination
EP0569104A1 (en) * 1992-05-08 1993-11-10 X-Rite, Inc. Portable spectrophotometer
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US20030133121A1 (en) * 1995-06-07 2003-07-17 The Boeing Company Directional reflectometer
WO2003087792A2 (en) * 2002-04-15 2003-10-23 Delta Dansk Elektronik, Lys & Akustik Method and apparatus for measuring light reflections of an object
US20040008346A1 (en) * 2002-07-09 2004-01-15 National Inst. Of Advanced Ind. Science And Tech. Optical system for measurement of optical constant
US20040169863A1 (en) * 2003-02-27 2004-09-02 Etsuo Kawate Optical system for measurement
CN201716105U (en) * 2010-06-03 2011-01-19 交通部公路科学研究所 Retroreflection brightness coefficient measurement device
WO2011095605A1 (en) * 2010-02-04 2011-08-11 Delta Dansk Elektronik, Lys & Akustik Apparatus and method for measuring retroreflectivity of a surface
CN202230021U (en) * 2011-09-16 2012-05-23 长安大学 Device for testing reflection performance of pavement materials
WO2013102661A1 (en) * 2012-01-04 2013-07-11 Carsten Thirstrup Spectroscopic sensor for bio-sensing
CN103344613A (en) * 2013-07-26 2013-10-09 杭州远方光电信息股份有限公司 Apparatus and method for measuring reflection characteristic of material
CN203231970U (en) * 2013-03-07 2013-10-09 兰州交通大学 Road-surface light reflection tester
CN103674897A (en) * 2013-11-22 2014-03-26 中国矿业大学 Light reflex experiment table
US20140368823A1 (en) * 2013-06-17 2014-12-18 Intellectual Reserves, LLC System and Method for Determining Fluid Parameters
CN104570647A (en) * 2013-10-24 2015-04-29 株式会社理光 Optical sensor and image forming apparatus incorporating same

Patent Citations (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE467757B (en) * 1989-09-18 1992-09-07 Volvo Ab Method for optical surface inspection
US5048970A (en) * 1990-06-29 1991-09-17 Nicolas J. Harrick Optical attachment for variable angle reflection spectroscopy
DE4137673A1 (en) * 1991-11-15 1993-05-19 Siemens Ag Grazing X=ray reflectometer for rapid diffraction investigations - enabling surface property and thin film thickness determination
EP0569104A1 (en) * 1992-05-08 1993-11-10 X-Rite, Inc. Portable spectrophotometer
US20030133121A1 (en) * 1995-06-07 2003-07-17 The Boeing Company Directional reflectometer
US6128093A (en) * 1998-10-08 2000-10-03 Nikon Corporation Unit for measuring optical properties
DE10011219A1 (en) * 2000-03-08 2001-09-13 Volkswagen Ag Road condition inspection method for car, involves comparing intensity of laser beam reflected from road corresponding to laser radiation angle, and its amplitude distribution with reference values
WO2003087792A2 (en) * 2002-04-15 2003-10-23 Delta Dansk Elektronik, Lys & Akustik Method and apparatus for measuring light reflections of an object
US20040008346A1 (en) * 2002-07-09 2004-01-15 National Inst. Of Advanced Ind. Science And Tech. Optical system for measurement of optical constant
US20040169863A1 (en) * 2003-02-27 2004-09-02 Etsuo Kawate Optical system for measurement
WO2011095605A1 (en) * 2010-02-04 2011-08-11 Delta Dansk Elektronik, Lys & Akustik Apparatus and method for measuring retroreflectivity of a surface
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105928908A (en) * 2016-04-28 2016-09-07 广西大学 Method and device for measuring material surface reflectivity

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Application publication date: 20160309