KR101773262B1 - Non touch-pseudostatic Bridge Weight in motion device and the method of it - Google Patents

Non touch-pseudostatic Bridge Weight in motion device and the method of it Download PDF

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Publication number
KR101773262B1
KR101773262B1 KR1020150172286A KR20150172286A KR101773262B1 KR 101773262 B1 KR101773262 B1 KR 101773262B1 KR 1020150172286 A KR1020150172286 A KR 1020150172286A KR 20150172286 A KR20150172286 A KR 20150172286A KR 101773262 B1 KR101773262 B1 KR 101773262B1
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South Korea
Prior art keywords
bridge
vehicle
sensor
deflection
displacement
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KR1020150172286A
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Korean (ko)
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KR20170066742A (en
Inventor
김준희
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단국대학교 산학협력단
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
    • G01G19/02—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles
    • G01G19/03—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles for weighing during motion
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F13/00—Arrangements for obstructing or restricting traffic, e.g. gates, barricades ; Preventing passage of vehicles of selected category or dimensions
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G9/00—Methods of, or apparatus for, the determination of weight, not provided for in groups G01G1/00 - G01G7/00
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V8/00—Prospecting or detecting by optical means
    • G01V8/10—Detecting, e.g. by using light barriers
    • G01V8/12—Detecting, e.g. by using light barriers using one transmitter and one receiver
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/04—Detecting movement of traffic to be counted or controlled using optical or ultrasonic detectors
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/065—Traffic control systems for road vehicles by counting the vehicles in a section of the road or in a parking area, i.e. comparing incoming count with outgoing count

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geophysics (AREA)
  • Traffic Control Systems (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Abstract

The present invention relates to a BWIM measuring apparatus and method based on non-contact deflection measurement, and more particularly, to a BWIM measuring apparatus and method based on non-contact deflection measurement capable of calculating the weight of a vehicle passing through a bridge through measurement of deflection displacement of the bridge More particularly, the present invention relates to a non-contact deflection measurement-based BWIM measuring apparatus capable of calculating the weight of a vehicle passing through a bridge through measurement of a deflection displacement of the bridge. The database unit 500 provides stiffness information of the bridge B, ; A first sensor 310 for sensing a vehicle V passing through the bridge B; A second sensor 320 for measuring a deflection displacement value d of the bridge B in real time when the vehicle V is sensed from the first sensor 310; The deflection value filtered by the measured deflection displacement value d and the rigidity information of the bridge B are used in connection with the database unit 500, the first sensor 310 and the second sensor 320, And a control unit (400) for deriving a total weight of the vehicle (V), wherein the weight measured by the constant deflection amount of the bridge according to the vehicle weight is closer to the measured weight The error range between the two can be drastically reduced, thereby enabling more precise oversampling.

Description

TECHNICAL FIELD [0001] The present invention relates to a non-contact deflection measurement apparatus and method,

The present invention relates to a BWIM measuring apparatus and method based on noncontact deflection measurement, and more particularly, to a BWIM measuring apparatus based on contactless static deflection measurement capable of calculating the weight of a vehicle passing through a bridge through measurement of deflection displacement of the bridge And methods.

Freight vehicles loaded and unloaded have a fixed loading capacity for each freight vehicle.

This is because when the cargo is overloaded, the road is broken due to the operation of the vehicle whose load is exceeded.

In addition, there is a problem that an overload of a loaded vehicle loses its center of gravity and an accident occurs. In addition to a loaded vehicle, other traveling vehicles may lead to a series of traffic accidents. In this case, .

However, in the case of freight forwarders, in order to save even a little of the fuel cost required for operation, it is often the case that the cargo is loaded in excess of the weight determined by the law.

This increases the risk of car accidents, as well as damage to roads.

As an apparatus to prevent such problems, over-run equipment for measuring the load of a freight vehicle is buried in the ground.

As an example of conventional overspeed interception equipment, there is an axial load estimation apparatus (BWIM) of a traveling vehicle based on a dynamic influence theory that estimates the axial load of a traveling vehicle.

FIG. 1 shows a state in which an overspeed interrupting device 20 for interrupting a conventional overt vehicle 10 is embedded in a road surface.

Such a conventional axial load estimating apparatus measures the total weight of the entire vehicle only by estimating the axial load of the front wheel shaft 11 and the rear wheel shaft 12 of the traveling vehicle having a large variation, so that the error between the measured weight and the actual gross weight is 10 Which is much higher than the proper error range of 5%, and thus the reliability is significantly lowered.

On the other hand, most of the measuring apparatus for measuring the axial load of the moving vehicle is buried in the road. However, due to the shock transmitted from the front wheel shaft 11 and the rear wheel shaft 12 of the over- There has been a problem of degradation.

(Patent Document 1) EP2650659 A1

(Patent Document 1) US5183126 A

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide an apparatus and method for measuring BWIM based on noncontact sag deflection measurement capable of accurately measuring the load of a vehicle while ensuring durability It has its purpose.

In order to solve the above problems, the present invention provides a bridge structure, comprising: a database unit (500) for providing stiffness information of a bridge (B); A first sensor 310 for sensing a vehicle V passing through the bridge B; A second sensor 320 for measuring a deflection displacement value d of the bridge B in real time when the vehicle V is sensed from the first sensor 310; And the rigidity information of the bridge B connected to the database unit 500 and the first sensor 310 and the second sensor 320 by filtering the measured deflection displacement value d, And a control unit 400 for deriving a total weight of the vehicle V by using the BWIM measurement apparatus.

The first sensor 310 may include a contactless static deflection measurement based BWIM measurement device that is installed on the bridge B and includes a photosensor that applies a signal in a direction across the bridge B .

The control unit 400 includes a vehicle position determining module m1 connected to the first sensor 310 to determine the position of the vehicle V, A displacement measurement module m2 connected to the second sensor 320 to measure a deflection displacement value d of the bridge B in real time; A filtering module (m3) for filtering the deflection displacement value (d) measured in real time in the displacement measurement module (m2); And a load calculation module (m4) for calculating the total weight of the vehicle (V) by comparing the filtered pseudo static deflection value with the stiffness information of the bridge (B) provided from the database unit (500) Based BWIM measurement device.

On the other hand, when the first sensor 310 recognizes the vehicle V that has entered the bridge B, the bridge B is blocked until the vehicle V passes the bridge B (600); Lt; RTI ID = 0.0 > BWIM < / RTI >

(S1) a first step of checking the position of the vehicle V which the control unit 400 has entered the bridge B; (S2) The second step of real-time measurement of the deflection displacement value d of the bridge B from the moment the control unit 400 enters the bridge B until the vehicle V advances the bridge B, ; (S3) a third step in which the controller 400 calculates a pseudo-static deflection value by filtering the deflection displacement value d measured in the second step; (S4) a fourth step of the controller (400) deriving the maximum value of the pseudo-static deflection value filtered in the third step; (S5) The control unit 400 calculates the total weight of the vehicle V using the maximum value of the pseudo-static deflection value derived in the fourth step and the stiffness information of the bridge B stored in the database unit 500, step; Lt; RTI ID = 0.0 > BWIM < / RTI > measurement based on non-contact pseudo-deflection measurements.

The present invention as described above has the following effects.

First, since the measured weight is closer to the measured weight through the measurement of a certain pseudo-static deflection amount of the bridge according to the vehicle weight, the error range between the two is drastically reduced, thereby enabling more precise overspeed control.

Second, since a sensor for remotely measuring the deflection of a bridge is provided without buried with a weighing device or the like on the road, there is no fear of failure of the weighing device and durability is increased.

Third, since the gross weight of the vehicle can be accurately measured regardless of the speed of the vehicle, the reliability of the gross weight can be greatly improved.

FIG. 1 shows a state in which an overspeed interrupting device 20 for interrupting a conventional overt vehicle 10 is embedded in a road surface.
FIG. 2 is a view showing that the second sensor 320 measures the deflection displacement d of the bridge in real time when the bridge 200 passes over the bridge 100 according to a preferred embodiment of the present invention.
3 is a conceptual diagram of a controller 400 according to a preferred embodiment of the present invention.
4 is a flowchart illustrating an operation according to a preferred embodiment of the present invention.
5 is a graph showing a real time dynamic displacement graph (L1), which is a displacement in which a deflection displacement (d) value of a bridge of a bridge (100) changes in real time when the bridge (200) passes over the bridge (100) according to a preferred embodiment of the present invention. , And a pseudo-static displacement graph (L2) filtered using a real-time dynamic displacement graph (L1).
6 is a view illustrating a state in which the blocking device 110 according to another embodiment of the present invention is installed at the entrance of the bridge 100. In FIG.
7 is an experimental result table according to a preferred embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, the definitions of these terms should be described based on the contents throughout this specification.

2 is a view showing a state in which the second sensor 320 measures the deflection displacement value d of the bridge in real time when the freight vehicle V 100 passes over the bridge B 200 according to the preferred embodiment of the present invention .

It is assumed that the cargo vehicle (V, 100) described here carries a cargo exceeding a normal cargo amount.

When the freight vehicle V 100 passes over the bridge B 200, the bridge B 200 may have its own rigidity and deflection may occur. The deflection displacement value d may be transmitted to the second sensor 320 ).

More specifically, the first sensor 310 may be installed on the bridge B 200. The first sensor 310 may be a photo sensor that applies a signal in a direction crossing the bridge B 200. It is possible.

The second sensor 320 may be installed on the ground below the bridge B 200 and may determine the deflection displacement value d of the bridge of the bridge B 200 at the point of the first sensor 310 of the bridge B 200 ) Can be measured.

The second sensor 320 may operate in conjunction with the first sensor 310. More preferably the second sensor 320 may operate when the first sensor 310 senses the freight vehicle V, Lt; / RTI >

The first sensor 310 and the second sensor 320 are connected to the controller 400, respectively.

As shown in FIG. 3, a controller 400 according to a preferred embodiment of the present invention may be provided with a vehicle position determining module M1, a displacement measuring module M2, a filtering module M3, and a load calculating module M4 .

The vehicle position determination module M1 is connected to the first sensor 310. [

When the freight vehicle V 100 moves into the bridge B 200 and is moved, the first sensor 310 senses the sensed vehicle position and the sensed vehicle position confirmation signal is transmitted to the vehicle position determination module Ml. S1)

The control unit 400 activates the measurement module M2 to detect the position of the bridge provided from the second sensor 320. When the position of the vehicle is detected by the first sensor 310, The deflection displacement value d is recorded in real time (S2)

That is, the displacement measurement module M2 records the information of the deflection displacement value d of the bridge measured by the second sensor 320, and calculates the deflection displacement value d (d) of the real bridge recorded in the displacement measurement module M2 ) Information may be represented by the real time dynamic displacement graph L1 of FIG.

5 is a graph showing a real time dynamic displacement in which a deflection displacement value d of a bridge B 200 is recorded in real time when a freight vehicle V 100 passes over a bridge B 200 according to a preferred embodiment of the present invention A pseudo-static displacement graph (L2) obtained by pseudo-static filtering of a graph (L1) and a real-time dynamic displacement graph (L1), wherein the speed of the vehicle (V) is 40 kilometers per hour, 60 kilometers per hour, (B), respectively.

In other words, the real time dynamic displacement graph L1 is a graph in which the deflection displacement value d of the bridge B, 200 is recorded in real time while the freight vehicle V, 100 passes over the bridge B, 200.

5A to 5C, the maximum value of the deflection displacement value d derived from the pseudo-static displacement graph L2 filtered using the real-time dynamic displacement graph L1 is the vehicle speed V It is the fact that it appears the same regardless.

Therefore, by using the BWIM measurement apparatus based on non-contact pendulous deflection measurement according to the present invention, the calculation of the total weight of the accurate vehicle V can be easily performed irrespective of the speed of the vehicle V. [

The filtering module M3 derives a pseudo-static displacement graph L2 by performing filtering (S3) with a real-time dynamic displacement graph L1, which is a deflection displacement value d of the real-time bridge recorded by the displacement measurement module M2 .

The load calculation module M4 calculates the maximum value MAX from the value of the pseudo-static displacement graph L2 derived by the filtering module M3 (S4), compares the calculated maximum value MAX with the calculated maximum value MAX The total weight of the freight vehicle V 100 can be ultimately derived using the rigidity information of the bridge 200 provided.

Meanwhile, according to another embodiment of the present invention, the blocking device 110 may be installed at the beginning of the direction of the freight vehicle V, 100 in the bridge B 200.

The blocking device 110 is installed on the bridge B 200 so that the first sensor 310 recognizes the freight vehicle V 100 entering the bridge B 200. The freight vehicle V 100 Is provided so as to temporarily block the bridge (B, 200) until it passes the bridge (B, 200).

6 is a view illustrating a state in which the blocking device 110 according to another embodiment of the present invention is installed at the entrance of the bridge B 200.

Once the freight vehicle V 100 enters the bridge B 200, the blocking device 110 may be operated to block entry of the next freight vehicle V 100 into the bridge B 200.

This is to specify only whether or not the cargo vehicle (V, 100) is overloaded when the one cargo vehicle (V, 100) passes the bridge (B, 200).

In this case, a camera module (not shown) capable of discriminating the type of the vehicle before entering the bridge B 200 is provided in the vicinity of the approach direction of the freight vehicle V And 200 are not the freight vehicles of interest, it is also possible that the blocking device 110 is maintained in the open state, so that it is possible to prevent inconvenience in the passage of a general passenger car or the like.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be understood that the present invention can be changed.

V, 100: vehicle
B, 200: Bridge
310: first sensor
320: second sensor
400:
500: Database
600: Breaker

Claims (5)

A database unit 500 for providing stiffness information of the bridge B;
A first sensor 310 installed on the bridge B to sense the vehicle V passing the bridge B;
A second sensor 320 installed outside the bridge B for measuring the deflection displacement value d of the bridge B in real time when the vehicle V is detected from the first sensor 310;
The dynamic displacement graph L1 is connected to the database unit 500 and the first sensor 310 and the second sensor 320 to determine deflection displacement values d measured by the second sensor 320. [ , Deriving a pseudo-static displacement graph (L2) from the dynamic displacement graph (L1), calculating a maximum value of the pseudo-static deflection value from the pseudo-static displacement graph (L2) And a controller (400) for deriving a total weight of the vehicle (V) using the rigidity information of the bridge (B)
BWIM measuring device based on contactless static deflection measurement.
The method according to claim 1,
The first sensor (310)
And a photosensor installed in the bridge (B) and applying a signal in a direction across the bridge (B)
BWIM measuring device based on contactless static deflection measurement.
The method according to claim 1,
The control unit (400)
A vehicle position determining module (m1) connected to the first sensor (310) to check the position of the vehicle (V);
A displacement measurement module m2 connected to the second sensor 320 to measure a deflection displacement value d of the bridge B in real time;
A filtering module (m3) for filtering the deflection displacement value (d) measured in real time in the displacement measurement module (m2);
And a load calculation module (m4) for calculating the total weight of the vehicle (V) by comparing the filtered pseudo static deflection value with the stiffness information of the bridge (B) provided from the database unit (500)
BWIM measuring device based on contactless static deflection measurement.
The method according to claim 1,
In the bridge B, when the first sensor 310 recognizes the vehicle V that has entered the bridge B, the bridge B blocks the bridge B until the vehicle V passes the bridge B Apparatus 600; / RTI >
BWIM measuring device based on contactless static deflection measurement.
(S1) a control unit 400 confirms the position of the vehicle V entering the bridge B through the first sensor 310 installed on the bridge B;
(S2) The controller 400 sets the deflection displacement value d of the bridge B from the moment the vehicle V enters the bridge B to the advancement of the bridge B, A second step of deriving a dynamic displacement graph (L1) by measuring in real time through a second sensor (320);
(S3) a third step of the controller 400 filtering the dynamic displacement graph L1 derived in the second step to derive a pseudo-static displacement graph L2;
(S4) the controller 400 calculates a maximum value of the pseudo-static deflection value from the pseudo-static displacement graph L2 derived in the third step;
(S5) The controller 400 calculates the total weight of the vehicle V using the maximum value of the pseudo-static deflection value calculated in the fourth step and the stiffness information of the bridge B stored in the database unit 500, Comprising:
BWIM measurement method based on contactless static deflection measurement.
KR1020150172286A 2015-12-04 2015-12-04 Non touch-pseudostatic Bridge Weight in motion device and the method of it KR101773262B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111457821A (en) * 2020-04-15 2020-07-28 占天赐 Quick measuring equipment of freight train height

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* Cited by examiner, † Cited by third party
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US20190293518A1 (en) * 2018-03-20 2019-09-26 California Institute Of Technology New autonomous electro-optical system to monitor in real-time the full spatial motion (rotation and displacement) of civil structures
CN110781607B (en) * 2019-11-07 2021-08-10 大连理工大学 Bridge influence surface identification method considering vehicle wheel load spatial distribution
CN112195826B (en) * 2020-09-07 2021-12-03 中科育成科技服务(盐城)有限公司 Critical bridge vehicle limiting device for control engineering
CN114136414A (en) * 2021-10-19 2022-03-04 山东高速股份有限公司 Medium-small span concrete small box girder bridge heavy load identification system based on computer vision

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101056017B1 (en) * 2011-06-09 2011-08-10 김학선 Truck scale for shaft accommodating type
KR101105854B1 (en) * 2011-09-30 2012-01-17 씨티씨 주식회사 System for measuring vehicle-weight automatically using bridge response, and method for the same
KR101558085B1 (en) * 2014-04-16 2015-10-07 세종대학교산학협력단 Method for evaluating bridge using input-output relationship of load and record media recorded program for implement thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101056017B1 (en) * 2011-06-09 2011-08-10 김학선 Truck scale for shaft accommodating type
KR101105854B1 (en) * 2011-09-30 2012-01-17 씨티씨 주식회사 System for measuring vehicle-weight automatically using bridge response, and method for the same
KR101558085B1 (en) * 2014-04-16 2015-10-07 세종대학교산학협력단 Method for evaluating bridge using input-output relationship of load and record media recorded program for implement thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111457821A (en) * 2020-04-15 2020-07-28 占天赐 Quick measuring equipment of freight train height

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