CN111076896B - Method and system for testing instantaneous blinding effect of tunnel exit under low-angle sunlight - Google Patents
Method and system for testing instantaneous blinding effect of tunnel exit under low-angle sunlight Download PDFInfo
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Abstract
The invention discloses a method and a system for testing a tunnel exit low-angle sunlight instant blinding effect, which comprises the following steps: a. selecting a simulation test tunnel and a simulation test road surface, establishing a simulation low-angle sunlight system, and arranging illuminometers at the high positions of the eyes of a driver of a tested vehicle; b. a driver identifies a small target reference object arranged on the simulation test road surface on the selected simulation test tunnel and the simulation test road surface, records related data, and adjusts the illumination parameters of the simulation low-angle sunlight system; c. and detecting the recognition condition of the driver under the comparison of different illumination parameters. The invention carries out a plurality of groups of tests by changing a single illumination parameter, quantifies the influence degree of the visual ability of the driver caused by the blind effect, provides theoretical data reference for the setting of the light adaptation zone at the tunnel entrance and reduces the traffic accident rate of the tunnel exit section.
Description
Technical Field
The invention relates to the technical field of tunnel traffic safety, in particular to a method and a system for testing a tunnel exit low-angle sunlight instant blinding effect.
Background
Tunnels are built in the underground or mountains for vehicles to run, and sometimes are used as pipelines and passerby passing equal channels, which are particularly common in hilly lands. The tunnel is common in the southwest area of China and is also a key for communication on a plurality of main roads, but because the tunnel is long and narrow and dark, the tunnel is considered to be additionally provided with light for illumination, and when the tunnel enters and exits from a tunnel port, the blind effect is easily caused due to sudden change of light.
By the end of 2018, 17738 is shared by the national on-line highway tunnels, the total mileage reaches 1723.61 kilometers, and 1509 kilometers and 195.10 kilometers are increased compared with the mileage in the last year.
Since tunnel traffic accidents are frequently occurred at the entrance and exit sections, the accident rate is also increased. When the sun is at a low position (especially in the morning or at evening), a driver driving from a tunnel where things go may directly blind due to the direct irradiation of the sun to the eyes, and cannot acquire information (such as instrument panels) of a driving environment and a vehicle, so that traffic accidents such as rear-end collision, wall collision, side turning and the like are caused.
Therefore, in order to solve the above problems, a method and a system for testing the transient blinding effect of low-angle sunlight at a tunnel exit are needed, which can test the influence degree of the blinding effect on the visual ability of a driver, further optimize the light arrangement in the tunnel and the light adaptation band arrangement at the tunnel entrance, provide theoretical data reference for the light adaptation band arrangement at the tunnel entrance, and reduce the traffic accident rate at the tunnel exit section.
Disclosure of Invention
In view of this, the present invention aims to overcome the defects in the prior art, and provide a method and a system for testing a tunnel exit low-angle sunlight instantaneous blinding effect, which can quantify the degree of influence of the blinding effect on the visual ability of a driver, so as to prevent rear-end collision, side/side sliding collision and frontal collision caused by the blinding effect, further optimize the light arrangement in the tunnel and the light adaptation band arrangement at the tunnel entrance, provide theoretical data reference for the light adaptation band arrangement at the tunnel entrance, and reduce the traffic accident rate at the tunnel exit section.
The invention discloses a method for testing the instantaneous blinding effect of low-angle sunlight at a tunnel exit, which comprises the following steps:
a. selecting a simulation test tunnel and a simulation test road surface, establishing a simulation low-angle sunlight system, and arranging illuminometers at the high positions of the eyes of a driver of a tested vehicle;
b. a driver identifies a small target reference object arranged on the simulation test road surface on the selected simulation test tunnel and the simulation test road surface, records related data, and adjusts the illumination parameters of the simulation low-angle sunlight system;
c. and detecting the recognition condition of the driver under the comparison of different illumination parameters.
Furthermore, in the step b, a driver sits in the test vehicle at a fixed position, the sight line height in the test process is kept as an invariable, a small target reference object is arranged at a position 100m away from the front of the test vehicle, and the driving safety distance is guaranteed to be approximately 100m, so that the safety distance of the test is set to be 100m, and the test data has reference value.
Further, the small target reference object is a cube with the length, width and height of 20cm, the surface reflectivity is 20%, and the small target reference object is a standard reference object.
Further, a low-angle daylight illumination angle α is set1Illumination brightness I1The simulated sunlight illumination is read by the illuminometer without change, the steps b and c are repeated, and the low-angle sunlight illumination time is T1And the driver identifies the small target reference object and records the identification result: can or cannot; changing lamp illumination time T2And the driver identifies the small target reference object and records the identification result: can or cannot; the same driver repeats the experiment n times in turn, and the result is m1The small target reference object is identified again, and the small target reference object identification rate is m1N, finally obtaining the identification rate m of the small target reference object1The relationship between/n and the irradiation time T.
Further, a low-angle daylight illumination angle α is set1Irradiation time T1The simulated daylight illumination is read by the illuminometer without change, the steps b and c are repeated, and the low-angle daylight brightness I1Irradiating, and recording the recognition result by the driver recognizing the small target reference object: can or cannot; changing the brightness of low-angle daylight I2And the driver identifies the small target reference object and records the identification result: can or cannot; the same driver repeats the experiment n times in turn, and the result is m2Small target reference object capable of being identified againThe small target reference object recognition rate is m2N, finally obtaining the identification rate m of the small target reference object2The relationship between/n and the illumination brightness I.
Further, a low-angle daylight brightness I is set1Irradiation time T1The simulated sunlight illumination is read by the illuminometer without changing, the steps b and c are repeated, and the low-angle sunlight illumination angle is alpha1And the driver identifies the small target reference object and records the identification result: can or cannot; changing the low-angle sunlight irradiation angle alpha2And the driver identifies the small target reference object and records the identification result: can or cannot; the same driver repeats the experiment n times in turn, and the result is m3The small target reference object is identified again, and the small target reference object identification rate is m3And/n. Finally obtaining the identification rate m of the small target reference object3The relationship between/n and the illumination angle α.
In conclusion, the relation between the identification rate m/n of the small target reference object and the angle alpha, the brightness i and the irradiation time t is obtained through a plurality of groups of tests, so that the theoretical data of the blinding effect is mastered, a test data basis is provided for optimizing the light adaptation band of the tunnel portal in the later period, and the safe driving distance of the tunnel portal is easily obtained.
A system for realizing the tunnel exit low-angle sunlight instant blinding effect test comprises:
the simulation test tunnel and the simulation test road surface are used for testing scenes;
the simulated low-angle daylight system is used for emitting low-angle daylight simulating different illumination parameters and comprises a lamp post arranged along the vertical direction and a daylight simulation lamp arranged on the lamp post in a sliding manner; the lamp post is provided with scales, which is convenient for recording the height of the sunlight simulation lamp in the experiment so as to obtain the incident angle alpha of the simulated low-angle sunlight,
the illuminometer is used for reading the illumination of the simulated low-angle sunlight generated by the simulated lamp, and the illuminometer (or lux meter) is an instrument for specially measuring luminosity and brightness, namely the illumination intensity (illumination) is the illumination degree of an object, namely the ratio of luminous flux obtained on the surface of the object to the illuminated area;
the test vehicle is used for simulating a real tunnel scene environment by a driver;
and the small target reference object is used for being recognized by the driver.
The invention has the beneficial effects that: the invention discloses a method and a system for testing the transient blinding effect of low-angle sunlight at a tunnel exit, which are used for carrying out a plurality of groups of tests by changing a single illumination parameter and quantifying the influence degree of the visual ability of a driver caused by the blinding effect so as to prevent rear-end collision, side/side sliding collision and frontal collision caused by the blinding effect, further optimize the light arrangement in the tunnel and the light adaptation zone arrangement at the tunnel entrance, provide theoretical data reference for the light adaptation zone arrangement at the tunnel entrance and reduce the traffic accident rate of the tunnel exit section.
Drawings
The invention is further described below with reference to the following figures and examples:
FIG. 1 is a system flow diagram of the present invention;
FIG. 2 is a schematic diagram of an experimental system of the present invention.
Detailed Description
Fig. 1 is a system flow chart of the present invention, fig. 2 is a schematic diagram of an experimental system of the present invention, and as shown in the drawing, the method for testing the instantaneous blinding effect of the low-angle sunlight at the exit of the tunnel in this embodiment includes the following steps:
a. selecting a simulation test tunnel and a simulation test road surface, establishing a simulation low-angle sunlight system, and arranging an illuminometer 3 at a high position such as the position of eyes of a driver of a tested vehicle;
b. a driver identifies a small target reference object 4 arranged on the simulation test road surface on the selected simulation test tunnel and the simulation test road surface, records related data, and adjusts the illumination parameters of the simulation low-angle sunlight system;
c. and detecting the recognition condition of the driver under the comparison of different illumination parameters.
In this embodiment, in step b, the driver sits in the test vehicle at a fixed position, the height of the sight line in the test process is kept as an invariant, the small target reference object 4 is arranged at a position 100m away from the front of the test vehicle, and the driving safety distance is guaranteed to be approximately 100m, so that the safety distance of the test is set to be 100m, and the test data has a reference value.
In this embodiment, the small target reference object 4 is a cube with a length, width and height of 20cm, and has a surface reflectance of 20%, which is a standard reference object.
In this embodiment, the low-angle sunlight irradiation angle α is set1Illumination brightness I1The simulated sunlight illumination is read by the illuminometer 3 without change, the steps b and c are repeated, and the low-angle sunlight illumination time is T1The driver recognizes the small target reference object 4, and records the recognition result: can or cannot; changing lamp illumination time T2The driver recognizes the small target reference object 4, and records the recognition result: can or cannot; the same driver repeats the experiment n times in turn, and the result is m1The small target reference object 4 is identified again, and the identification rate of the small target reference object 4 is m1N, finally obtaining the identification rate m of the small target reference object 41The relationship between/n and the irradiation time T.
In this embodiment, the low-angle sunlight irradiation angle α is set1Irradiation time T1The simulated daylight illumination is read by the illuminometer 3 without change, the steps b and c are repeated, and the low-angle daylight brightness I1The small target reference object 4 is illuminated, the driver recognizes it, and the recognition result is recorded: can or cannot; changing the brightness of low-angle daylight I2The driver recognizes the small target reference object 4, and records the recognition result: can or cannot; the same driver repeats the experiment n times in turn, and the result is m2The small target reference object 4 is identified again, and the identification rate of the small target reference object 4 is m2N, finally obtaining the identification rate m of the small target reference object 42The relationship between/n and the illumination brightness I.
In this embodiment, the low-angle daylight brightness I is set1Irradiation time T1The simulated sunlight illumination is read by the illuminometer 3 without changing, the steps b and c are repeated, and the low-angle sunlight illumination angle is alpha1The driver recognizes the small target reference object 4, and records the recognition result: can or cannot; changing the low-angle sunlight irradiation angle alpha2The driver recognizes the small target reference object 4, and records the recognition result: can or cannot; the same driver repeats the experiment n times in turn, and the result is m3The small target reference object 4 is identified again, and the identification rate of the small target reference object 4 is m3And/n. Finally obtaining the identification rate m of the small target reference object 43The relationship between/n and the illumination angle α.
In conclusion, the relation between the identification rate m/n of the small target reference object 4 and the angle alpha, the brightness i and the irradiation time t is obtained through a plurality of groups of tests, so that the theoretical data of the blinding effect is mastered, a test data basis is provided for optimizing the light adaptation band of the tunnel portal in the later period, and the safe driving distance of the tunnel portal is easily obtained.
A system for realizing the tunnel exit low-angle sunlight instant blinding effect test comprises:
the simulation test tunnel and the simulation test road surface are used for testing scenes;
the simulation low-angle daylight system is used for emitting low-angle daylight simulating different illumination parameters and comprises a lamp post 1 arranged along the vertical direction and a daylight simulation lamp 2 arranged on the lamp post 1 in a sliding manner; the lamp post 1 is provided with scales, which is convenient for recording the height of the sunlight simulation lamp 2 in the experiment, further obtaining the incident angle alpha of the simulated low-angle sunlight,
the illuminometer 3 is used for reading the illumination of the simulated low-angle sunlight generated by the simulated lamp, and the illuminometer 3 (or lux meter) is an instrument for specially measuring luminosity and brightness, namely the illumination intensity (illumination) is the illumination degree of an object, namely the ratio of luminous flux obtained on the surface of the object to the illuminated area;
the test vehicle is used for simulating a real tunnel scene environment by a driver;
and a small target reference object 4 for recognition by the driver.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (4)
1. A method for testing the instantaneous blinding effect of low-angle sunlight at a tunnel exit is characterized by comprising the following steps: the method comprises the following steps:
a. selecting a simulation test tunnel and a simulation test road surface, establishing a simulation low-angle sunlight system, and arranging illuminometers at the high positions of the eyes of a driver of a tested vehicle;
b. a driver identifies a small target reference object arranged on the simulation test road surface on the selected simulation test tunnel and the simulation test road surface, records related data, and adjusts the illumination parameters of the simulation low-angle sunlight system;
c. detecting the recognition condition of the driver under the comparison of different illumination parameters:
setting a low-angle daylight illumination angle alpha1Illumination brightness I1The simulated sunlight illumination is read by the illuminometer without change, the steps b and c are repeated, and the low-angle sunlight illumination time is T1And the driver identifies the small target reference object and records the identification result: can or cannot; changing lamp illumination time T2And the driver identifies the small target reference object and records the identification result: can or cannot; the same driver repeats the experiment n times in turn, and the result is m1The small target reference object is identified again, and the small target reference object identification rate is m1N, finally obtaining the identification rate m of the small target reference object1The relationship between/n and the irradiation time T;
setting a low-angle daylight illumination angle alpha1Irradiation time T1The simulated daylight illumination is read by the illuminometer without change, the steps b and c are repeated, and the low-angle daylight brightness I1Irradiating, and recording the recognition result by the driver recognizing the small target reference object: can or cannot; changing the brightness of low-angle daylight I2And the driver identifies the small target reference object and records the identification result: can or cannot; the same driver repeats the experiment n times in turn, and the result is m2The small target reference object can be identified again, so that the small target is identifiedThe recognition rate of the reference substance is m2N, finally obtaining the identification rate m of the small target reference object2The relationship between/n and the illumination intensity I;
setting Low Angle daylight Brightness I1Irradiation time T1The simulated sunlight illumination is read by the illuminometer without changing, the steps b and c are repeated, and the low-angle sunlight illumination angle is alpha1And the driver identifies the small target reference object and records the identification result: can or cannot; changing the low-angle sunlight irradiation angle alpha2And the driver identifies the small target reference object and records the identification result: can or cannot; the same driver repeats the experiment n times in turn, and the result is m3The small target reference object is identified again, and the small target reference object identification rate is m3N, finally obtaining the identification rate m of the small target reference object3The relationship between/n and the illumination angle α.
2. The method for testing the transient blinding effect of the low-angle sunlight at the exit of the tunnel according to claim 1, wherein: in step b, the driver sits in the test vehicle at a fixed position, the height of the sight line in the test process is kept as an invariable, and a small target reference object is arranged at a position 100m away from the front of the test vehicle.
3. The method for testing the transient blinding effect of the low-angle sunlight at the exit of the tunnel according to claim 2, wherein: the small target reference object is a cube with the length, width and height of 20cm, and the surface reflectivity is 20%.
4. A system for realizing the test of the instantaneous blinding effect of the low-angle sunlight at the exit of the tunnel by using the test method of the instantaneous blinding effect of the low-angle sunlight at the exit of the tunnel according to any one of claims 1 to 3, which is characterized in that: the method comprises the following steps:
the simulation test tunnel and the simulation test road surface are used for testing scenes;
the simulated low-angle daylight system is used for emitting low-angle daylight simulating different illumination parameters and comprises a lamp post arranged along the vertical direction and a daylight simulation lamp arranged on the lamp post in a sliding manner;
the illuminometer is used for reading the illumination of the simulated low-angle daylight generated by the simulated lamp;
the test vehicle is used for simulating a real tunnel scene environment by a driver;
and the small target reference object is used for being recognized by the driver.
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