CN105321343A - A system and method for detecting traffic conditions of large vehicles on a road based on manhole covers - Google Patents
A system and method for detecting traffic conditions of large vehicles on a road based on manhole covers Download PDFInfo
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- CN105321343A CN105321343A CN201410319732.7A CN201410319732A CN105321343A CN 105321343 A CN105321343 A CN 105321343A CN 201410319732 A CN201410319732 A CN 201410319732A CN 105321343 A CN105321343 A CN 105321343A
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- well cover
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Abstract
The invention relates to a system and method for detecting traffic conditions of large vehicles on a road based on manhole covers and solves the problem that the existing manhole covers on the lanes are not fully utilized. The system comprises a display terminal. Each manhole cover is equipped with a coil detector, a pressure detector, a wireless emitter and a controller, wherein the coil detector, the pressure detector and the wireless emitter are connected to the controller; and the wireless emitter is connected with the display terminal through a wireless network. Use degree of the larger vehicles on the road is summarized by calculating the time of the larger vehicles passing across the manhole covers within period time, and the use degree is graded. The resources of the manhole covers on the lanes are fully utilized, and based on the manhole covers, a set of feasible large vehicle traffic condition detection system and method are designed to provide reference information for city traffic management; the system and method can provide more useful helps for road construction and maintenance; and road construction strength is enhanced for the lanes where more large vehicles drive, so that road construction is allowed to be more cooperated with the actual traffic conditions.
Description
Technical field
The present invention relates to a kind of Vehicle Detection technical field, especially relate to a kind of system and method detecting cart traffic status in road based on inspection well cover.
Background technology
Inspection well cover is seen everywhere in the streets and lanes in cities and towns, and is also provided with inspection well cover on many pavement of road, and inspection well cover mostly remains traditional inspection well cover at present, only just plays the sewer mouth effect that covers, does not in addition have other useful places again.And these inspection well covers spreading all over cities and towns are also available resources, the utilization to inspection well cover is all considered in present many cities when carrying out urban renewal.Inspection well cover is transformed by some cities, and carry out transformation to shopping mall or the inspection well cover of having a rest on band road surface and make it to become view inspection well cover, this has carried out certain utilization to inspection well cover.But many inspection well covers be arranged on track are not fully used, especially the vehicle flowrate of these inspection well covers to place road can be utilized to detect, in real time data are transmitted, quantize the traffic conditions in inspection well cover section, make it possible to for urban traffic control, also may be used in various Vehicle Detection software, help user better can understand traffic conditions.Therefore, be necessary to utilize inspection well cover to design the system of a set of detection road traffic condition and the method for inspection vehicle flow.
Summary of the invention
The present invention mainly solves the problem that on existing track, inspection well cover is not fully used, and provides a kind of system and method detecting cart traffic status in road based on inspection well cover making full use of inspection well cover resource.
Above-mentioned technical matters of the present invention is mainly solved by following technical proposals: a kind of system detecting cart traffic status in road based on inspection well cover, comprise display terminal, inspection well cover is provided with the coil detector of record through vehicle sectioned coil magnetic line of force duration at the whole story, registration of vehicle presses through the pressure detector of inspection well cover weight, wireless launcher and controller, coil detector, pressure detector, wireless launcher is connected on controller, wireless launcher is connected with display terminal by wireless network, the cart road service rating data set are stored in controller, control according to vehicle through inspection well cover cutting magnetic line duration with press through inspection well cover information and calculate place road cart traffic usage degree, the traffic of this road cart is drawn more afterwards with the cart road service rating data set.The present invention utilizes the inspection well cover be arranged on road to detect the situation that cart in road traffic condition is current, take full advantage of Current resource, the information detected is sent to display terminal, the data that can provide for urban traffic control, according to this section cart behaviour in service, there is provided more how useful help for constructing road and maintenance, use many tracks to strengthen road construction intensity at cart, make road construction more coordinate actual traffic situation.
Based on a road traffic detection method for inspection well cover, comprise the following steps:
(1). in controller, set cart coefficient of flow in sense cycle time T, the road saturated flow value B preset, each track of road detected in advance
, i is track quantity; Unit interval T time length according to circumstances sets.
(2). record the duration at the whole story of each car through inspection shaft cutting magnetic line
, obtain and record the signal that each wheel presses through the weight of inspection well cover, setting dolly weight threshold, relatively obtain the signal that weight is less than or equal to dolly weight threshold, reset the time interval max-thresholds of a setting bicycle trigger winding detector and pressure detector, calculate the time interval of each coil detector signal initial time and pressure detectable signal initial time, the acquisition time interval is less than or equal to time interval max-thresholds, and coil detector signal initial time is early than the signal pair of pressure detector signal initial time, the temporal information of these signal pair coil detector signals and cutting magnetic line is sued for peace, obtain dolly time used in cooler cycle time
, then cart time used in cooler cycle time is obtained
, car is defined as dolly, and all vehicle of dolly as the heavier-weight such as bus, lorry that be greater than are defined as cart.Because dolly lateral wheel spacing is less, generally all inspection well cover can be pressed onto, and cart lateral wheel spacing is comparatively large, also exists through inspection well cover but situation about not being pressed onto.Thus dolly utilizes actual being easier to calculate through inspection well cover is actual, then subtract each other with total time used, just can obtain cart time used in cooler cycle time.Here mention coil detector signal and each vehicle time signal through inspection well cover cutting magnetic line, signal also have recorded the initial time of triggering.And pressure detector signal and wheel of vehicle trigger pip when pressing through inspection well cover, signal have recorded the out-of-date weight of pressure wheel, and the initial time triggered.
(3). according to cart time used in cycle length T
, this section of road saturated flow value B preset, each track cart coefficient
calculate track, inspection well cover place cart reduced discharge
, wherein
represent the cart track coefficient of flow in track, inspection well cover place,
for
in a value; Cart track coefficient of flow is each track throughput ratio, after the reduced discharge being aware of track, inspection well cover place cart, just can calculate the reduced discharge of other track carts.
(4). according to this road detected in advance each track cart track coefficient of flow and track, inspection well cover place cart reduced discharge
calculate the cart reduced discharge in other tracks, then using the cart reduced discharge of the reduced discharge sum in each track as this road
;
(5). using the cart traffic usage degree of the ratio of the cart reduced discharge of this road and road saturation volume B as this road
;
(6). repeat step (2) in T to (5) in multiple cycle length, obtain multiple cart traffic saturation degree value, after removing maximal value and minimum value, try to achieve average cart traffic usage degree
(7). in controller, in advance road cart behaviour in service is carried out classification, according to road traffic saturation degree
the rank dropped on judges the cart traffic of this road.The present invention utilizes the inspection well cover be arranged on road to detect road traffic condition, takes full advantage of Current resource, the information detected is sent to display terminal, listens reference information to urban traffic control.According to this section cart behaviour in service, more how useful help can be provided for constructing road and maintenance, use many tracks to strengthen road construction intensity at cart, make road construction more coordinate actual traffic situation.
As a kind of preferred version, the detection method of cart track, this road each track coefficient of flow detected in advance in step (1) and (4) is: choose some vehicle pass-through sample numbers at this road in a period of time according to probabilistic method, count the cart vehicle number passed through within the time period in each track, then using each track by the ratio of cart vehicle number and the road vehicle fleet cart track coefficient of flow as each track, finally again the cart track coefficient of flow that each track calculates in all samples is averaged, as the final cart track coefficient of flow in each track.At inspection well cover place road, within the time period of a setting, the sample number of random selecting some groups of vehicle pass-throughs, eachly choose in sample the cart track coefficient of flow calculating each track, finally the cart track coefficient of flow in this tracks all is averaged, as the final cart track coefficient of flow in this track.
As a kind of preferred version, in step (7), road cart behaviour in service being carried out classification process is: in advance road cart behaviour in service is divided into several grades, the threshold interval up and down of the corresponding one group of cart road usage degree of each grade, according to the interval judgement road cart traffic that present road cart uses angle value to fall.
Therefore, advantage of the present invention is: take full advantage of the inspection well cover resource on track, designs a set of feasible cart traffic service condition detection system and method, provide reference information to urban traffic control around inspection well cover.According to this section cart behaviour in service, more how useful help can be provided for constructing road and maintenance, use many tracks to strengthen road construction intensity at cart, make road construction more coordinate actual traffic situation.
Accompanying drawing explanation
Accompanying drawing 1 is a kind of schematic flow sheet of the inventive method;
Accompanying drawing 2 is a kind of structural frames diagrams of present system.
1-coil detector 2-pressure detector 3-controller 4-wireless launcher 5-display terminal.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment:
A kind of road traffic detection system based on inspection well cover of the present embodiment, as shown in Figure 2, comprise the inspection well cover be arranged on road, display terminal 5, inspection well cover is provided with record and presses through the pressure detector 2 of inspection well cover weight, wireless launcher 4 and controller 5 through the coil detector 1 of vehicle sectioned coil magnetic line of force duration at the whole story, registration of vehicle, infrared eye, pressure detector, wireless launcher are connected on controller, and wireless launcher is connected with display terminal by wireless network.The cart road service rating data set are stored in controller, controller through inspection well cover cutting magnetic line duration with press through inspection well cover information and calculate place road cart traffic usage degree, more afterwards draws the traffic of this road cart with the cart road service rating data set according to vehicle.
Based on the road traffic detection method of inspection well cover, as shown in Figure 1, its step is as follows:
Step one: set cart coefficient of flow in sense cycle time T, the road saturated flow value B preset, each track of road detected in advance in controller
, i is track quantity; This unit interval, T set as required, and in the present embodiment, setting detects unit interval 600s.The road saturated flow value B preset is 600/hour.And cart track, road each track coefficient of flow needs in advance by detecting setting.Its testing process is: choose some vehicle pass-through sample numbers at this road in a period of time according to probabilistic method, count the cart vehicle number passed through within the time period in each track, then using each track by the ratio of cart vehicle number and the road vehicle fleet cart track coefficient of flow as each track, finally again the cart track coefficient of flow that each track calculates in all samples is averaged, as the final cart track coefficient of flow in each track.For the road of three lanes in the present embodiment, three tracks are designated as a1, a2, a3 respectively, show that the cart coefficient of lanes in three tracks is respectively respectively by detecting
=0.18,
=0.22,
=0.21, suppose that inspection well cover is for being arranged on the a1 of track.
Step 2: the duration at the whole story recording each car through inspection shaft cutting magnetic line
, obtain and record the signal that each wheel presses through the weight of inspection well cover, setting dolly weight threshold, relatively obtain the signal that weight is less than or equal to dolly weight threshold, reset the time interval max-thresholds of a setting bicycle trigger winding detector and pressure detector, calculate the time interval of each coil detector signal initial time and pressure detectable signal initial time, the acquisition time interval is less than or equal to time interval max-thresholds, and coil detector signal initial time is early than the signal pair of pressure detector signal initial time, the temporal information of these signal pair coil detector signals and cutting magnetic line is sued for peace, obtain dolly time used in cooler cycle time
, then cart time used in cooler cycle time is obtained
, suppose that in this testing process, calculate service time time is 200s here,
Step 3: according to cart time used in cycle length T
, this section of road cart saturated flow value B preset, each track cart coefficient
calculate track, inspection well cover place cart reduced discharge
, wherein
represent the cart track coefficient of flow in track, inspection well cover place,
for
in a value.Then l=(200/600) * 600* (0.18/ (0.18+0.22+0.21)), approximating 59, is the result obtained after rounding up here
Step 4: according to this road detected in advance each track cart track coefficient of flow and track, inspection well cover place cart reduced discharge
calculate the cart reduced discharge in other tracks,
The then reduced discharge of track a2
The reduced discharge of track a3
;
Then using the cart reduced discharge of the reduced discharge sum in each track as this road
=173;
Step 5: using the cart traffic usage degree of the ratio of the cart reduced discharge of this road and road saturation volume B as this road
;
Step 6: repeat step 2 to five in T in multiple cycle length, obtains multiple cart traffic saturation degree value, tries to achieve average cart traffic usage degree after removing maximal value and minimum value
; Here suppose that technology obtains
be 0.25.
Step 7: in advance road cart behaviour in service is carried out classification, according to road traffic saturation degree in controller
the rank dropped on judges the cart traffic of this road.Used by the cart of road in the present embodiment and be divided into 5 grades, the threshold interval up and down of each grade corresponding cart road usage degree, is respectively:
Less [0:0.1)
Common [0.1:0.3)
More [0.3:0.5)
Frequently [0.5:0.7)
A lot [0.7:
)
According to crossing Current traffic intensity value 0.25 drop on interval common [0.1:0.3), then it is common for evaluating this road cart service condition.
Inspection well cover in the present embodiment is the centre being arranged on one of them track of road, and the present embodiment is for three lanes, and concrete hypothesis inspection well cover is arranged on left side.Inspection well cover also can arrange middle lane or right-hand lane, or for more multilane, inspection well cover is arranged on other tracks, and these can adopt the inventive method to calculate.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Although more employ the terms such as infrared eye, pressure detector, controller, wireless launcher, display terminal herein, do not get rid of the possibility using other term.These terms are used to be only used to describe and explain essence of the present invention more easily; The restriction that they are construed to any one additional is all contrary with spirit of the present invention.
Claims (4)
1. one kind is detected the system of cart traffic status in road based on inspection well cover, comprise the inspection well cover be arranged on road, it is characterized in that: also comprise display terminal (5), inspection well cover is provided with the coil detector (1) of record through vehicle sectioned coil magnetic line of force duration at the whole story, registration of vehicle presses through the pressure detector (2) of inspection well cover weight, wireless launcher (4) and controller (3), coil detector, pressure detector, wireless launcher is connected on controller, wireless launcher is connected with display terminal by wireless network, the cart road service rating data set are stored in controller, controller according to vehicle through inspection well cover cutting magnetic line duration with press through inspection well cover information and calculate place road cart traffic usage degree, the traffic of this road cart is drawn more afterwards with the cart road service rating data set.
2. detect a method for cart traffic status in road based on inspection well cover, adopt the system described in power 1, it is characterized in that: comprise the following steps:
(1). in controller, set cart coefficient of flow in sense cycle time T, the road cart saturated flow value B preset, each track of road detected in advance
, i is track quantity;
(2). record the duration at the whole story of each car through inspection shaft cutting magnetic line
, obtain and record the signal that each wheel presses through the weight of inspection well cover, setting dolly weight threshold, relatively obtain the signal that weight is less than or equal to dolly weight threshold, reset the time interval max-thresholds of a setting bicycle trigger winding detector and pressure detector, calculate the time interval of each coil detector signal initial time and pressure detectable signal initial time, the acquisition time interval is less than or equal to time interval max-thresholds, and coil detector signal initial time is early than the signal pair of pressure detector signal initial time, the temporal information of these signal pair coil detector signals and cutting magnetic line is sued for peace, obtain dolly time used in cooler cycle time
, then cart time used in cooler cycle time is obtained
,
(3). according to cart time used in cycle length T
, this section of road cart saturated flow value B preset, each track cart coefficient
calculate track, inspection well cover place cart reduced discharge
, wherein
represent the cart track coefficient of flow in track, inspection well cover place,
for
in a value;
(4). according to this road detected in advance each track cart track coefficient of flow and track, inspection well cover place cart reduced discharge
calculate the cart reduced discharge in other tracks, then using the cart reduced discharge of the reduced discharge sum in each track as this road
;
(5). using the cart traffic usage degree of the ratio of the cart reduced discharge of this road and road saturation volume B as this road
;
(6). repeat step (2) in T to (5) in multiple cycle length, obtain multiple cart traffic saturation degree value, after removing maximal value and minimum value, try to achieve average cart traffic usage degree
;
(7). in controller, in advance road cart behaviour in service is carried out classification, according to road traffic saturation degree
the rank dropped on judges the cart traffic of this road.
3. a kind of method detecting cart traffic status in road based on inspection well cover according to claim 2, it is characterized in that the detection method of cart track, this road each track coefficient of flow detected in advance in step (1) and (4) is: choose some vehicle pass-through sample numbers at this road in a period of time according to probabilistic method, count the cart vehicle number passed through within the time period in each track, then using each track by the ratio of cart vehicle number and the road vehicle fleet cart track coefficient of flow as each track, finally again the cart track coefficient of flow that each track calculates in all samples is averaged, as the final cart track coefficient of flow in each track.
4. a kind of method detecting cart traffic status in road based on inspection well cover according to claim 2, it is characterized in that in step (7), road cart behaviour in service being carried out classification process is: in advance road cart behaviour in service is divided into several grades, the threshold interval up and down of the corresponding one group of cart road usage degree of each grade, according to the interval judgement road cart traffic that present road cart uses angle value to fall.
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| Publication number | Publication date |
|---|---|
| CN105321343B (en) | 2017-08-25 |
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