CN207832184U - Tunnel portal driving sight distance measuring device - Google Patents
Tunnel portal driving sight distance measuring device Download PDFInfo
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- CN207832184U CN207832184U CN201721406143.8U CN201721406143U CN207832184U CN 207832184 U CN207832184 U CN 207832184U CN 201721406143 U CN201721406143 U CN 201721406143U CN 207832184 U CN207832184 U CN 207832184U
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Abstract
The utility model discloses a kind of tunnel portal driving sight distance measuring devices, it includes industrial camera and target, the target includes two or more and is arranged in the inside of tunnel portal by default spacing, and the industrial camera is arranged in the outside of tunnel portal and the image for acquiring the target in tunnel portal；Wherein, the horizontal distance between the industrial camera and the tunnel portal is L1, and the horizontal distance in the tunnel portal between first target and the tunnel portal is L2, and the spacing between two neighboring target is L3；The measuring device carries out calculating driving sight distance L according to the quantity n of the visible target of human eye in described image；Simple in structure, easy to operate, the measurement of the driving sight distance especially suitable for tunnel portal, measurement result is reliable and stable；It can be used to carry out control with an automatic light meter to tunnel illuminating system by the driving sight distance, not only ensure that drive safety, but also reduce electricity waste.
Description
Technical field
The utility model is related to a kind of tunnel portal driving sight distance measuring devices and its corresponding.
Background technology
The driving sight distance of driver is the essential condition for ensureing traffic safety, is the quantization of evaluation path visual environment quality
Index, and improve the important prerequisite of vehicle safe driving.Current sighting distance detection method mainly has regarding based on operating speed
Sighting distance detection and Highway Three-dimensional Dynamic Sight Distance away from detection, different roads and vehicle calculate.
But the sighting distance detection and the detection of the sighting distance of different roads and vehicle based on operating speed are primarily adapted for use in common public affairs
Road is not suitable for the tacheometrical survey of tunnel portal；Highway Three-dimensional Dynamic Sight Distance detection method is although it is contemplated that the shadows of more sighting distances
The factor of sound can more reflect true road conditions, but the foundation of road threedimensional model needs detailed road geometry information, and
Model foundation is complex, since there may be design data shortage, the more situation of later stage reorganization and expansion, modeling hardly possiblies for built road
Spending larger causes sighting distance detection efficiency not high.
Since the inside and outside difference in brightness in tunnel on daytime is very big, human eye can adapt to lag to the perception of luminance difference, will allow people
If speed is too fast traffic accident easily occurs for the feeling for generating " black hole " suddenly.It " is imitated in black hole to eliminate freeway tunnel
Answer ", alleviate the load at heart at driver's access tunnel hole, road tunnel entrance need to be illuminated and be rationally designed so that tunnel
Carry out smooth transition outside interior brightness and tunnel between natural light brightness under the premise of meeting minimum brightness.
Currently, tunnel is usually divided into entrance, changeover portion, interlude and outlet section by the design of tunnel lighting person according to specification
Illumination is designed Deng four sections.Each section of length and illumination is from annual traffic safety requirement, to maximal illumination in hole
Design is that determine, each section of lamp power and lamps and lanterns distribution are close in tunnel with maximum brightness outside annual hole and highest driving speed per hour
Degree.It can realize that illumination automatically controls very limited, usually the limitation because of line layout circuit, can only accomplish 2,3 grades manually
Or automatically control, the parameters such as such as weather, speed, vehicle flowrate are only considered in the design phase to maximum value is given, it is final each
The length and illumination of Duan Zhaoming is also in maximum state of value always.It can not be from for time-varying parameters such as weather, speed, vehicle flowrates
Adaptive mode modulation macroscopically is carried out to the illumination in entire tunnel.Therefore, this traditional design and the tunnel used shine at present
Bright system has a large amount of waste of energy.
Utility model content
The utility model is simple in structure to solve the above problems, provide a kind of tunnel portal driving sight distance measuring device,
Easy to operate, the measurement of the driving sight distance especially suitable for tunnel portal, measurement result is reliable and stable.
To achieve the above object, the technical solution adopted in the utility model is：
A kind of tunnel portal driving sight distance measuring device comprising：Industrial camera (10) and target (20), the target
(20) include more than two and be arranged in the inside of tunnel portal (30) by default spacing, the industrial camera (10) is arranged in tunnel
The outside at road hole (30) and the image for being used to acquire the target (20) in tunnel portal (30)；Wherein, the industrial camera
(10) horizontal distance between the tunnel portal (30) is L1, first target (20) and institute in the tunnel portal (30)
It is L2 to state the horizontal distance between tunnel portal (30), and the spacing between two neighboring target (20) is L3.
Preferably, the industrial camera (10) includes two, wherein an industrial camera (10) is for shooting big visual angle figure
Picture is to obtain field luminance, wherein another industrial camera (20) is for shooting remote burnt image to obtain the target in image (20)
Quantity.
Preferably, the mounting height H1 of the industrial camera (10) be apart from 2.5 meters of ground, and the industrial camera (10) with
It is 40 meters that horizontal distance between the tunnel portal (30), which is L1,.
Preferably, the total quantity of the target (20) is 6, and the mounting height H2 of each target (20) is apart from ground 1.
Meter, it is 50 that the horizontal distance in the tunnel portal (30) between first target (20) and the tunnel portal (30), which is L2,
Meter, it is 10 meters that the spacing between two neighboring target (20), which is L3,.
Preferably, the industrial camera (10) is positioned in constant-temperature protective cover.
Preferably, the target surface of the target (10) is non-luminous round tablet, and is vertically mounted on tunnel by supporting rack
On road side wall；A diameter of 0.2 meter of the target surface of the target (10).
The utility model has the beneficial effects that：
A kind of tunnel portal driving sight distance measuring device of the utility model, by the way that industry is arranged outside tunnel portal
Camera carries out image taking to the target in tunnel portal, and carries out calculating driving sight distance, structure according to the target quantity of identification
Simply, easy to operate, the measurement of the driving sight distance especially suitable for tunnel portal, measurement result is reliable and stable；It can be used to pass through
The driving sight distance carries out control with an automatic light meter to tunnel illuminating system, not only ensure that drive safety, but also reduces electricity waste.
Description of the drawings
Attached drawing described herein is used to provide a further understanding of the present invention, and constitutes one of the utility model
Point, the exemplary embodiment of the utility model and the description thereof are used to explain the utility model, does not constitute to the utility model
Improper restriction.In the accompanying drawings：
Fig. 1 is a kind of layout structure schematic diagram of tunnel portal driving sight distance measuring device of the utility model；
In figure,
10- industrial cameras；20- targets；30- tunnel portals；
The horizontal distance of L1- industrial cameras and tunnel portal；The horizontal distance of L2- targets and tunnel portal；L3- targets it
Between spacing；The mounting height of H1- industrial cameras；The mounting height of H2- targets.
Specific implementation mode
In order to keep technical problem to be solved in the utility model, technical solution and advantageous effect clearer, clear, with
The present invention will be further described in detail for lower combination accompanying drawings and embodiments.It should be appreciated that specific reality described herein
Example is applied only to explain the utility model, is not used to limit the utility model.
As shown in Figure 1, a kind of tunnel portal driving sight distance measuring device of the utility model comprising：Industrial camera 10
With target 20, the target 20 includes more than two and is arranged in the inside of tunnel portal 30, the industry phase by default spacing
Machine 10 is arranged in the outside of tunnel portal 30 and the image for acquiring the target 20 in tunnel portal 30；Wherein, the industry
Horizontal distance between camera 10 and the tunnel portal 30 is L1, first target 20 and the tunnel in the tunnel portal 30
Horizontal distance between road hole 30 is L2, and the spacing between two neighboring target 20 is L3；The measuring device is according to
The quantity n of the visible target of human eye 20 carries out calculating driving sight distance L in image, that is, driving sight distance L=L1+L2+ (n-1) * L3.
In the present embodiment, the industrial camera 10 includes two, wherein an industrial camera 10 is for shooting big visual angle figure
Picture is to obtain field luminance, wherein another industrial camera 20 is for shooting remote burnt image to obtain the number of the target 20 in image
Amount；According to the field luminance in the wide-angle image judge the quantity of the visible target of human eye in the remote burnt image 20
n.Alternatively, a kind of shooting image can also be carried out only with an industrial camera 10, and obtains and regard respectively from the image of shooting
Field brightness information and target characteristic information；The wide-angle image and described can also be shot successively using an industrial camera 10
Remote coke image.The present embodiment carries out shooting the wide-angle image and the remote burnt image using two industrial cameras 10 respectively,
Working efficiency and the precision of images all highers, measurement accuracy are ensured.Preferably, the wide-angle image and the remote burnt figure
Picture, there is no be used as effective image after current occlusion situation in confirming image.
Installation dimension：The industrial camera 10 of the utility model and the installation dimension of target 20 are mainly that simulated automotive enters tunnel
Human eye vision during road hole.In the present embodiment, the mounting height H1 of the industrial camera 10 is apart from ground 2.5
Rice, and it is 40 meters that the horizontal distance between the industrial camera 10 and the tunnel portal 30, which is L1,.The total quantity of the target 20
Be 6, the mounting height H2 of each target 20 be in 1. meters of ground, the tunnel portal 30 first target 20 with it is described
Horizontal distance between tunnel portal 30 is that L2 is 50 meters, and the spacing between two neighboring target 20 is that L3 is 10 meters.If inspection
It measures to first target, then it represents that driving sight distance is 90 meters (40 meters+50 meters) or more, if detection obtains second target, then
Indicate that driving sight distance is 100 meters or more, and so on, if one all can't detect, driving sight distance is less than 90 meters.The mark
The quantity of target 20 can require to be adjusted according to different measurement accuracy, be not limited.
Mounting structure：The industrial camera 10 is positioned over mating profession holder, upright bar, installation foundation in constant-temperature protective cover,
Outside tunnel portal hole front 40 meters of positions, away from ground 2.5m high and towards hole, scheme inside and outside the hole of inlet for acquiring
Picture.For industrial camera by mains-supplied, image output interface is network interface.The target surface of the target 10 is non-luminous round tablet,
And it is vertically mounted on tunnel sidewalls by supporting rack；A diameter of 0.2 meter of the target surface of the target 10.
The measurement process of the utility model tunnel portal driving sight distance measuring device mainly includes the following steps that：
A. target 20 is set in the inside of tunnel portal 30, the target 20 includes more than two and by default spacing cloth
It sets, the horizontal distance in the tunnel portal 30 between first target 20 and the tunnel portal 30 is L2, two neighboring mark
Spacing between target 20 is L3；
B. industrial camera 10, the figure for acquiring the target 20 in tunnel portal 30 are set in the external of tunnel portal 30
Picture, the horizontal distance between the industrial camera 10 and the tunnel portal 30 are L1；
C. the quantity n of the visible target of human eye 20 is counted in the image of the target 20 acquired according to the industrial camera 10
Calculate driving sight distance L, that is, driving sight distance L=L1+L2+ (n-1) * L3.
In the step b, the industrial camera 10 acquires the image of the target 20 in tunnel portal 30, further wraps
It includes：
B1. wide-angle image is shot, gray value of image, and root are obtained by carrying out gray count to the wide-angle image
Mapping calculation, which is carried out, according to the gray value of image obtains corresponding field luminance；
B2. the remote burnt image of shooting, by carrying out feature extraction to the remote burnt image, to obtain the target 20 in image
Quantity.
In the step b2, feature extraction is carried out to the remote burnt image, refers to that edge is carried out to the remote burnt image
Detection obtains all edges in image, and is filtered to the edge by morphologic filtering algorithm, finally by target
The characteristics of image to match with the target 20 with algorithm extraction.
In the step c, the calculating of the quantity n of the visible target of the human eye 20 further comprises：
C1. in remote burnt image, each target and the characteristics of image of adjacent domain are extracted；Described image feature includes following
Any one or more combinations：Gray average, gray variance, edge strength, edge length, distribution of color, misalignment；
C2. the sorting algorithm for using fuzzy reasoning to be combined with support vector machines, to each target 20, with the remote burnt figure
The field luminance of the corresponding position of the characteristics of image of picture and the wide-angle image be input, with target whether human eye be visible as it is defeated
Go out, target visibility described in automatic decision；
C. quantity statistics are carried out to the visible target of human eye.
It should be noted that each embodiment in this specification is described in a progressive manner, each embodiment weight
Point explanation is all difference from other examples, and the same or similar parts between the embodiments can be referred to each other.
The preferred embodiment of the utility model has shown and described in above description, it should be understood that the utility model not limits to
In form disclosed herein, it is not to be taken as excluding other embodiments, and can be used for various other combinations, modification and ring
Border, and can be in this paper utility model contemplated scopes, modifications can be made through the above teachings or related fields of technology or knowledge.
And changes and modifications made by those skilled in the art do not depart from the spirit and scope of the utility model, then it all should be in the utility model
In the protection domain of appended claims.
Claims (7)
1. a kind of tunnel portal driving sight distance measuring device, which is characterized in that including：Industrial camera (10) and target (20), institute
It states target (20) to include more than two and by default spacing be arranged in the inside of tunnel portal (30), the industrial camera (10) sets
It sets in the outside of tunnel portal (30) and the image for acquiring target (20) in tunnel portal (30)；Wherein, the industry
Horizontal distance between camera (10) and the tunnel portal (30) is L1, first target (20) in the tunnel portal (30)
Horizontal distance between the tunnel portal (30) is L2, and the spacing between two neighboring target (20) is L3；The measurement
Device carries out calculating driving sight distance L according to the quantity n of the visible target of human eye in described image 20, that is, driving sight distance L=L1+
L2+(n-1)*L3。
2. a kind of tunnel portal driving sight distance measuring device according to claim 1, it is characterised in that：The industrial camera
(10) include two, wherein an industrial camera (10) is used to shoot wide-angle image to obtain field luminance, wherein another
Industrial camera (10) is for shooting remote burnt image to obtain the quantity of the target in image (20).
3. a kind of tunnel portal driving sight distance measuring device according to claim 1, it is characterised in that：The industrial camera
(10) mounting height H1 is and the level between the industrial camera (10) and the tunnel portal (30) apart from 2.5 meters of ground
It is 40 meters that distance, which is L1,.
4. a kind of tunnel portal driving sight distance measuring device according to claim 1, it is characterised in that：The target (20)
Total quantity be 6, the mounting height H2 of each target (20) is first in 1. meters of ground, the tunnel portal (30)
Horizontal distance between target (20) and the tunnel portal (30) is that L2 is 50 meters, the spacing between two neighboring target (20)
It it is 10 meters for L3.
5. a kind of tunnel portal driving sight distance measuring device according to claim 1 or 2 or 3, it is characterised in that：The work
Industry camera (10) is positioned in constant-temperature protective cover.
6. a kind of tunnel portal driving sight distance measuring device according to claim 1 or 4, it is characterised in that：The target
(20) target surface is non-luminous round tablet, and is vertically mounted on tunnel sidewalls by supporting rack.
7. a kind of tunnel portal driving sight distance measuring device according to claim 6, it is characterised in that：The target (20)
A diameter of 0.2 meter of target surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721406143.8U CN207832184U (en) | 2017-10-26 | 2017-10-26 | Tunnel portal driving sight distance measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721406143.8U CN207832184U (en) | 2017-10-26 | 2017-10-26 | Tunnel portal driving sight distance measuring device |
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| Publication Number | Publication Date |
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| CN207832184U true CN207832184U (en) | 2018-09-07 |
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ID=63384485
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| CN201721406143.8U Active CN207832184U (en) | 2017-10-26 | 2017-10-26 | Tunnel portal driving sight distance measuring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107816974A (en) * | 2017-10-26 | 2018-03-20 | 厦门市智联信通物联网科技有限公司 | Tunnel portal driving sight distance measurement apparatus and measuring method |
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2017
- 2017-10-26 CN CN201721406143.8U patent/CN207832184U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107816974A (en) * | 2017-10-26 | 2018-03-20 | 厦门市智联信通物联网科技有限公司 | Tunnel portal driving sight distance measurement apparatus and measuring method |
| CN107816974B (en) * | 2017-10-26 | 2024-01-23 | 厦门市智联信通物联网科技有限公司 | Device and method for measuring vision distance of tunnel entrance driving |
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