CN103473948B - Piezoelectric cable laying structure and the trace lateral attitude recognition methods of overloaded vehicle wheel - Google Patents

Piezoelectric cable laying structure and the trace lateral attitude recognition methods of overloaded vehicle wheel Download PDF

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Publication number
CN103473948B
CN103473948B CN201310435232.5A CN201310435232A CN103473948B CN 103473948 B CN103473948 B CN 103473948B CN 201310435232 A CN201310435232 A CN 201310435232A CN 103473948 B CN103473948 B CN 103473948B
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piezoelectric cable
vehicle
piezoelectric
road
cable
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CN103473948A (en
Inventor
李星新
张翼飞
孙秀雅
任伟新
袁斌
徐明波
张立敏
吴宇
葛斌
沈龙泉
李德章
王源容
江浩
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Anhui Testing Center for Highway Engineering
HEFEI CONSTRUCTION OF KEY PROJECTS AUTHORITY
Hefei University of Technology
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ANHUI TESTING CENTER FOR HIGHWAY ENGINEERING
HEFEI CONSTRUCTION OF KEY PROJECTS AUTHORITY
Hefei University of Technology
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Abstract

The invention discloses a kind of piezoelectric cable laying structure and the trace lateral attitude recognition methods of overloaded vehicle wheel, it is characterized in that being formed " Z " shape structure with piezoelectric cable on the highway or bridge pavement of vehicle traveling, first piezoelectric cable in " Z " shape structure is vertical with direction, track with the 3rd road piezoelectric cable, and presses vehicle heading one in front and one in back respectively across on left half track and right half track; Distance between first piezoelectric cable and the 3rd road piezoelectric cable is L1, L1 ≠ 0; Second piezoelectric cable and first piezoelectric cable have angle θ, θ ≠ 0, and second piezoelectric cable and first piezoelectric cable intersect at road left side bearing; Second piezoelectric cable and the 3rd road piezoelectric cable intersect at road right side bearing.The present invention, while acquisition overload car weight amount and axle weigh, can identify that it takes turns the lateral attitude of trace on track.

Description

Piezoelectric cable laying structure and the trace lateral attitude recognition methods of overloaded vehicle wheel
Technical field
The present invention relates to bridge monitoring technical field, specifically a kind of recognition methods of overloaded vehicle wheel trace lateral attitude, the lateral attitude of the car that overloads when travelling for highway bridge vehicle identifies.
Background technology
Highway bridge steel bridge deck directly bears the effect of wheel load, and many have the current steel bridge deck of heavy traffic load in succession to occur fatigue damage phenomenon after use several years or more than ten years.Result of study shows, the stress amplitude that the fatigue lifetime of steel bridge deck and wheel load produce and act on number of times and have very large relation, and for bridge, be not only overload of vehicle, the lateral attitude of vehicle in track is also very large on the impact of bridge.The bridge collapse event recurred in recent years, very large relation is had by the overload of vehicle and its lateral attitude on bridge with on bridge, and scientific and effective overload car lateral attitude recognition methods is less, bring certain difficulty to the lateral attitude probability Distribution Model research of overload car wheel trace.
Current dynamic weighing system both domestic and external, mostly can only measure the weight and the speed of a motor vehicle etc. of vehicle, cannot measure the lateral attitude of vehicle in track simultaneously; In addition, some are based on the vehicle location recognition technology of image or laser technology, cannot identify the weight of vehicle simultaneously and differentiate whether overload.Patent (200910047121) " dynamic weighing system of road vehicle ", based on piezoelectric cable technology, can measure gross combination weight, single wheel load and road speed, but cannot measure the lateral attitude of vehicle in track; Patent (200810156777.1) " method based on the measurement vehicle on expressway Position And Velocity of line array CCD " by installing two linear array CCD cameras on highway, separated in time takes the image of the right driving vehicle of its camera lens, the data of coordinate points are asked for according to geometric relationship, calculate the lane position at vehicle place, but the weight of vehicle can not be differentiated and whether overload.So one can determine highway bridge overloads car weight amount and its lateral attitude just by active demand simultaneously.
Summary of the invention
The technical problem to be solved in the present invention is, for the problems referred to above of overload car lateral attitude identification at present, there is provided a kind of piezoelectric cable laying structure and the trace lateral attitude recognition methods of overloaded vehicle wheel, to determine that the overload car weight amount on highway bridge takes turns trace lateral attitude with it simultaneously.
The present invention is that technical solution problem adopts following technical scheme:
The feature of piezoelectric cable laying structure of the present invention is: on the road surface of vehicle travel, formed " Z " shape structure with piezoelectric cable, first piezoelectric cable in described " Z " shape structure is vertical with direction, track with the 3rd road piezoelectric cable, and presses vehicle heading one in front and one in back respectively across on left half track and right half track; Distance between described first piezoelectric cable and the 3rd road piezoelectric cable is L1, L1 ≠ 0; Second piezoelectric cable and first piezoelectric cable have angle θ, θ ≠ 0, and described second piezoelectric cable and first piezoelectric cable intersect at road left side bearing; Described second piezoelectric cable and the 3rd road piezoelectric cable intersect at road right side bearing.
The feature of overloaded vehicle wheel of the present invention trace lateral attitude recognition methods is: utilize described piezoelectric cable laying structure to realize the identification of overloaded vehicle wheel trace lateral attitude as follows:
The vehicle at the uniform velocity travelled at one end sails described " Z " shape structure into by first piezoelectric cable (3), successively through first piezoelectric cable (3), second piezoelectric cable (4) and the 3rd road piezoelectric cable (5), and sail out of described " Z " shape structure; Order:
Vehicle the near front wheel is successively at t 1and t 2time be engraved in that first piezoelectric cable (3) and second piezoelectric cable (4) are upper produces the near front wheel piezoelectric detection signal;
Vehicle left rear wheel is successively at t 1' and t 2in ' time, is engraved in first piezoelectric cable (3) and second piezoelectric cable (4) upper generation left rear wheel piezoelectric detection signal;
Vehicle off-front wheel is successively at t 3and t 4time be engraved in that second piezoelectric cable (4) and the 3rd road piezoelectric cable (5) are upper produces off-front wheel piezoelectric detection signal;
Vehicle off hind wheel is successively at t 3' and t 4in ' time, is engraved in second piezoelectric cable (4) and the 3rd road piezoelectric cable (5) upper generation off hind wheel piezoelectric detection signal;
According to the piezoelectric detection signal that each wheel produces through each road piezoelectric cable, calculate respectively and obtain left front wheel load W fl, left back wheel load W bl, right front wheel load W brwith right back wheel load W fr;
Then, complete vehicle weight W is obtained by formula (1):
W = 1 2 ( Σ i Σ j n w ij + Σ 1 n w 2 j ) ; ( i = 1,3 ) - - - ( 1 )
In formula (1): n is axletree quantity, w ijrepresent the axle weight representated by a jth signal of the i-th road piezoelectric cable;
Speed of a motor vehicle v is obtained by formula (2):
v = L 1 t 4 - t 1 - - - ( 2 )
Wheelbase d is obtained by formula (3):
d = v × ( t 1 ′ - t 1 ) = t 1 ′ - t 1 t 4 - t 1 L 1 - - - ( 3 )
Wheelspan D is obtained by formula (4):
D = v × ( t 3 - t 2 ) cot θ = t 3 - t 2 t 4 - t 1 L 1 cot θ - - - ( 4 )
The lateral attitude y of vehicle in track is obtained by formula (5):
y = v × ( t 2 - t 1 ) cot θ = t 2 - t 1 t 4 - t 1 L 1 cot θ - - - ( 5 )
Lateral attitude y refers to the distance of vehicle revolver apart from track left hand edge.
Therefore, obtain vehicle weight based on formula (1) and differentiate and whether overload, obtain the overload lateral attitude of car in track based on formula (5).
The feature of overloaded vehicle wheel of the present invention trace lateral attitude recognition methods is also:
In one end that described vehicle sails into, distance first piezoelectric cable (3) arranges ground induction coil 1, L2 ≠ 0 apart from for L2.
Described distance L1 be 2.5m ?3.5m.
Described L2 is 300mm.
Compared with prior art, beneficial effect of the present invention is embodied in:
1, the present invention can obtain information such as comprising gross combination weight, single wheel load vehicle and wheelbase, wheelspan, tire number and the lateral attitude of vehicle in track, can differentiate overload car weight amount and lateral attitude thereof simultaneously.
2, structure of the present invention is simple, is arranged to " Z " just can detects required information of vehicles with three piezoelectric cables.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Number in the figure: 1 ground induction coil, 2 information handling systems, 3 first piezoelectric cables, 4 second piezoelectric cables, 5 the 3rd road piezoelectric cables.
Embodiment
See Fig. 1, in the present embodiment, driving vehicle dynamic weighing sensor is formed " Z " shape structure with piezoelectric cable on the road surface of vehicle travel, first piezoelectric cable 3 in " Z " shape structure is vertical with direction, track with the 3rd road piezoelectric cable 5, and presses vehicle heading one in front and one in back respectively across on left half track and right half track; Distance between first piezoelectric cable 3 and the 3rd road piezoelectric cable 5 is L1, L1 ≠ 0; Second piezoelectric cable 4 and first piezoelectric cable 3 have angle θ, θ ≠ 0, and second piezoelectric cable 4 and first piezoelectric cable 5 intersect at road left side bearing; Second piezoelectric cable 4 and the 3rd road piezoelectric cable 5 intersect at road right side bearing.
In the present embodiment, driving vehicle dynamic weighing sensor carries out the method for driving vehicle dynamic weighing and is:
The vehicle at the uniform velocity travelled at one end sails the driving vehicle dynamic weighing sensor of " Z " shape structure into by first piezoelectric cable 3, successively through first piezoelectric cable 3, second piezoelectric cable 4 and the 3rd road piezoelectric cable 5, and sail out of the driving vehicle dynamic weighing sensor of " Z " shape structure; Order:
Vehicle the near front wheel is successively at t 1and t 2in time, is engraved on first piezoelectric cable 3 and second piezoelectric cable 4 and produces the near front wheel piezoelectric detection signal;
Vehicle left rear wheel is successively at t 1' and t 2in ' time, is engraved on first piezoelectric cable 3 and second piezoelectric cable 4 and produces left rear wheel piezoelectric detection signal;
Vehicle off-front wheel is successively at t 3and t 4in time, is engraved on second piezoelectric cable 4 and the 3rd road piezoelectric cable 5 and produces off-front wheel piezoelectric detection signal;
Vehicle off hind wheel is successively at t 3' and t 4in ' time, is engraved on second piezoelectric cable 4 and the 3rd road piezoelectric cable 5 and produces off hind wheel piezoelectric detection signal;
According to the piezoelectric detection signal that each wheel produces through each road piezoelectric cable, calculate respectively and obtain left front wheel load W fl, left back wheel load W bl, right front wheel load W brwith right back wheel load W fr;
Then, complete vehicle weight W is obtained by formula (1):
W = 1 2 ( Σ i Σ j n w ij + Σ 1 n w 2 j ) ; ( i = 1,3 ) - - - ( 1 )
In formula (1): n is axletree quantity, w ijrepresent the axle weight representated by a jth signal of the i-th road piezoelectric cable;
Speed of a motor vehicle v is obtained by formula (2):
v = L 1 t 4 - t 1 - - - ( 2 )
Wheelbase d is obtained by formula (3):
d = v × ( t 1 ′ - t 1 ) = t 1 ′ - t 1 t 4 - t 1 L 1 - - - ( 3 )
Wheelspan D is obtained by formula (4):
D = v × ( t 3 - t 2 ) cot θ = t 3 - t 2 t 4 - t 1 L 1 cot θ - - - ( 4 )
The lateral attitude y of vehicle in track is obtained by formula (5):
y = v × ( t 2 - t 1 ) cot θ = t 2 - t 1 t 4 - t 1 L 1 cot θ - - - ( 5 )
Lateral attitude y refers to the distance of vehicle revolver apart from track left hand edge.
In concrete enforcement, in one end that vehicle sails into, distance first piezoelectric cable 3 is 300mm apart from the ground induction coil 1, L2 arranging 2000 × 2000mm for L2; Arrange distance L1 be 2.5m ?3.5m.
On the road surface of vehicle travel, formed " Z " shape structure with piezoelectric cable in the present embodiment, configuration information disposal system 2, the piezoelectric detection signal that ground induction coil 1 and each road piezoelectric cable produce all is inputted in signal processing system 2.
In the present embodiment, because second piezoelectric cable longitudinally becomes angle theta with runway, by this piezoelectric cable when left side wheel on same axletree is different with right side wheels, the load of the single wheel in left and right on same axletree can be recorded like this, by verifying the single wheel load recorded by first piezoelectric cable and the 3rd road piezoelectric cable, judge the unbalance loading situation of vehicle according to wheel load, the number of tire can be judged simultaneously according to the number of wheel load pulse.

Claims (4)

1. overloaded vehicle wheel trace lateral attitude recognition methods, arranging piezoelectric cable laying structure is: travel on highway bridge road surface at vehicle and formed " Z " shape structure with piezoelectric cable, first piezoelectric cable (3) in described " Z " shape structure is vertical with direction, track with the 3rd road piezoelectric cable (5), and presses vehicle heading one in front and one in back respectively across on left half track and right half track; Distance between described first piezoelectric cable (3) and the 3rd road piezoelectric cable (5) is L1, L1 ≠ 0; Second piezoelectric cable (4) and first piezoelectric cable (3) have angle θ, θ ≠ 0, and described second piezoelectric cable (4) and first piezoelectric cable (5) intersect at road left side bearing; Described second piezoelectric cable (4) and the 3rd road piezoelectric cable (5) intersect at road right side bearing; It is characterized in that utilizing described piezoelectric cable laying structure to realize the identification of overloaded vehicle wheel trace lateral attitude as follows:
The vehicle at the uniform velocity travelled at one end sails described " Z " shape structure into by first piezoelectric cable (3), successively through first piezoelectric cable (3), second piezoelectric cable (4) and the 3rd road piezoelectric cable (5), and sail out of described " Z " shape structure; Order:
Vehicle the near front wheel is successively at t 1and t 2time be engraved in that first piezoelectric cable (3) and second piezoelectric cable (4) are upper produces the near front wheel piezoelectric detection signal;
Vehicle left rear wheel is successively at t 1' and t 2in ' time, is engraved in first piezoelectric cable (3) and second piezoelectric cable (4) upper generation left rear wheel piezoelectric detection signal;
Vehicle off-front wheel is successively at t 3and t 4time be engraved in that second piezoelectric cable (4) and the 3rd road piezoelectric cable (5) are upper produces off-front wheel piezoelectric detection signal;
Vehicle off hind wheel is successively at t 3' and t 4in ' time, is engraved in second piezoelectric cable (4) and the 3rd road piezoelectric cable (5) upper generation off hind wheel piezoelectric detection signal;
According to the piezoelectric detection signal that each wheel produces through each road piezoelectric cable, calculate respectively and obtain left front wheel load W fl, left back wheel load W bl, right front wheel load W brwith right back wheel load W fr;
Then, complete vehicle weight W is obtained by formula (1):
In formula (1): n is axletree quantity, w ijrepresent the axle weight representated by a jth signal of the i-th road piezoelectric cable;
Speed of a motor vehicle v is obtained by formula (2):
Wheelbase d is obtained by formula (3):
Wheelspan D is obtained by formula (4):
The lateral attitude y of vehicle in track is obtained by formula (5):
Lateral attitude y refers to the distance of vehicle revolver apart from track left hand edge;
Therefore, obtain vehicle weight based on formula (1) and differentiate and whether overload, obtain the overload lateral attitude of car in track based on formula (5).
2. overloaded vehicle wheel according to claim 1 trace lateral attitude recognition methods, it is characterized in that: the one end of sailing at described vehicle, distance first piezoelectric cable (3) arranges ground induction coil 1, L2 ≠ 0 apart from for L2.
3. overloaded vehicle wheel according to claim 1 trace lateral attitude recognition methods, is characterized in that: described distance L1 is 2.5m ?3.5m.
4. overloaded vehicle wheel according to claim 2 trace lateral attitude recognition methods, is characterized in that: described L2 is 300mm.
CN201310435232.5A 2013-09-23 2013-09-23 Piezoelectric cable laying structure and the trace lateral attitude recognition methods of overloaded vehicle wheel Expired - Fee Related CN103473948B (en)

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CN104458074A (en) * 2014-12-03 2015-03-25 重庆市华驰交通科技有限公司 Novel wheel axle recognizer
CN106979812A (en) * 2016-01-15 2017-07-25 广西大学 A kind of vehicle on highway dynamic weighing system
CN106644007A (en) * 2016-08-30 2017-05-10 辉因科技(北京)有限公司 Diagonal axis type dynamic weight measurement system and diagonal axis type dynamic weight measurement method
CN107895478B (en) * 2017-10-13 2020-07-14 浙江大学 Road traffic monitoring method for road surface
CN107730912A (en) * 2017-11-04 2018-02-23 浙江师范大学 Automobile lane change detection means in a kind of tunnel of self power generation
KR102087688B1 (en) * 2018-11-13 2020-03-11 한국광기술원 optical fiber sensor measuring weight of car and contact position
CN112802339A (en) * 2020-12-31 2021-05-14 江苏中路工程技术研究院有限公司 System and method for measuring transverse distribution of wheel tracks
CN113686421B (en) * 2021-08-31 2023-06-23 山东新凌志检测技术有限公司 Vehicle detection device and method

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CN1260873A (en) * 1997-05-14 2000-07-19 斯耐普昂仪器有限公司 Tyre pressure determination
CN1858563A (en) * 2006-04-06 2006-11-08 徐州师范大学 Cable type medium and low speed road dynamic weighing device
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