CN-122015747-A - Measuring system and measuring method for measuring displacement of intersection point of main cable and suspender of suspension bridge

CN122015747ACN 122015747 ACN122015747 ACN 122015747ACN-122015747-A

Abstract

The invention relates to the technical field of suspension bridge measurement, and discloses a measurement system for measuring the displacement of the intersection point of a main cable and a suspension rod of a suspension bridge, which comprises a plurality of first connecting components, a plurality of displacement sensors, a plurality of auxiliary cables and a central processing unit, wherein the first connecting components are connected with suspension bridge cable clamps, the first connecting components are used for placing the displacement sensors and providing connection points for the auxiliary cables, two ends of the auxiliary cables are respectively connected with the intersection point of the main cable, a second connecting component is arranged on each displacement sensor, each displacement sensor is used for monitoring the displacement between the intersection point of the main cable and the auxiliary cable above the intersection point of the main cable, the central processing unit is used for receiving and processing displacement information, the displacement sensors transmit the displacement information to the central processing unit according to preset frequency, and a positioning module is arranged on each displacement sensor and transmits three-dimensional coordinate information to the central processing unit according to preset frequency, and the central processing unit analyzes the three-dimensional coordinates of the displacement sensors at different moments. The invention can conveniently and accurately monitor the health condition of the suspender at any time.

Inventors

ZHOU YIN
Yan Lupeng
XIE HOULI
WEN XIN
ZHANG HONG
WANG YUE
WANG CHUANDONG
ZHOU JIANTING
FAN SHIWEN
TANG QIZHI
YANG JIPENG
YANG CHANGXI

Assignees

重庆交通大学
重庆市建设信息中心
湖北省交通规划设计院股份有限公司
重庆市九龙坡区建设事务中心

Dates

Publication Date: 20260512
Application Date: 20260209

Claims (10)

1. The measuring system for measuring the intersection point displacement of the main cable and the suspension rod of the suspension bridge is characterized by comprising a plurality of first connecting components, a plurality of displacement sensors, a plurality of auxiliary cables and a central processing unit, wherein the first connecting components are connected with the suspension bridge cable clamp, the first connecting components are used for placing the displacement sensors and keeping the displacement sensors in a vertical state all the time, the auxiliary cables are used for providing connection points, two ends of the auxiliary cables are respectively connected with the intersection points of the main cables on two sides of the suspension rod through the corresponding first connecting components, the magnetic rings on the displacement sensors are provided with second connecting components for enabling the magnetic rings to clamp and limit the auxiliary cables, the displacement sensors are used for monitoring the displacement between the intersection point of the main cable and the auxiliary cable above the intersection point of the main cable, and the central processing unit is used for receiving and processing the displacement information monitored by the displacement sensors; The displacement sensor transmits the monitored displacement information between the intersection point of the main cable and the auxiliary cable above the intersection point of the main cable to the central processing unit according to the preset frequency, the displacement sensor is provided with a positioning module, the positioning module transmits the three-dimensional coordinate information of the displacement sensor to the central processing unit according to the preset frequency, and the central processing unit analyzes the three-dimensional coordinates of the displacement sensor at different moments.
2. The measuring system for the displacement of the intersection point of the main cable and the suspension rod of the suspension bridge according to claim 1, further comprising a plurality of wind speed sensors, wherein the wind speed sensors are connected with the first connecting assembly, the wind speed sensors are used for monitoring the wind speed received by the intersection point of the corresponding main cable, and when the wind speed monitored by the wind speed sensors is larger than a set threshold value, the central processor sets the received displacement information and the three-dimensional coordinate information of the displacement sensors as abnormal data.
3. The system for measuring displacement of intersection of a main cable and a boom of a suspension bridge as defined in claim 1, wherein the first connection assembly comprises a first connection plate, two first connectors for providing connection points for auxiliary cables; the first connecting plate is provided with a plurality of first connecting holes, sleeved on the cable clamp bolts through the first connecting holes and connected with the cable clamp bolts; The first connecting piece includes mutually perpendicular and connected second connecting plate and first backup pad, and second connecting plate and first backup pad all are connected with first connecting plate, and the second connecting plate is located the bolted connection plane length direction central line of cable clip, is equipped with the second connecting hole on the second connecting plate, and the second connecting plate passes through the second connecting hole and is connected with supplementary cable.
4. The measuring system for the intersection displacement of a suspension bridge main cable and a boom according to claim 3, wherein the first connecting assembly further comprises a first supporting member for placing a displacement sensor, the first supporting member comprises a first supporting column, a universal joint, a second supporting column and a connecting disc, the first supporting column is connected with the first connecting plate, the universal joint, the second supporting column and the connecting disc, the first supporting column is located between the two second connecting plates and is respectively connected with the corresponding second connecting plates, the diameter of the first supporting column is larger than the width of the second connecting plates, the first supporting column and the second supporting column are connected through the universal joint, and the displacement sensor is detachably connected through the connecting disc and the second supporting column.
5. The measuring system for the intersection displacement of the suspension bridge main cable and the suspension rod according to claim 4, wherein the second support column is provided with a through hole for placing a displacement sensor, the second support column is connected with the connecting disc through a bolt, the connecting disc is provided with a strip-shaped hole, one end of a measuring rod of the displacement sensor penetrates through the strip-shaped hole, the measuring rod of the displacement sensor is connected with the first nut, and the first nut is abutted against the upper surface of the connecting disc.
6. The measuring system for the intersection displacement of the suspension bridge main cable and the suspension rod according to claim 1, wherein the second connecting component comprises a second connecting piece sleeved on the magnetic ring of the displacement sensor and a plurality of connecting clamping rings capable of being in sliding fit with the second connecting piece, the second connecting piece comprises a connecting cylinder and two symmetrically arranged connecting columns, the connecting cylinder is sleeved on the magnetic ring of the displacement sensor, the two connecting columns are respectively connected with the connecting cylinder, a placing groove is formed in the lower end face of the connecting column, a connecting rod is arranged in the placing groove along the length direction of the connecting column, the connecting clamping rings are in sliding fit with the connecting rod, the connecting clamping rings are elastic, and gaps are formed in the lower ends of the connecting clamping rings and can be used for being clamped with auxiliary cables.
7. The measuring system for the intersection displacement of the suspension bridge main cable and the suspension rod according to claim 3, further comprising a limiting assembly, wherein the limiting assembly comprises two opposite limiting pieces which are used for limiting and providing support respectively, each limiting piece comprises a first limiting column, a second limiting column and a spring, the first limiting columns are connected with the side edges of the first connecting plate, the inner side surfaces of the first limiting columns are provided with first containing grooves used for containing the second limiting columns, the lower surfaces of the first connecting plates are provided with second containing grooves with one ends communicated with the side surfaces of the first connecting plates, the second containing grooves are arranged in the length direction of the first connecting plates, one ends of the springs are connected with the inner walls of the second containing grooves, the other ends of the springs are connected with the second limiting columns, the upper ends of the second limiting columns are in butt joint with the inner walls of the second containing grooves, and the second limiting columns can be located in the first limiting columns through the first containing grooves.
8. The measuring method for measuring the intersection displacement of the main cable of the suspension bridge and the boom is characterized by being applied to the measuring system for measuring the intersection displacement of the main cable of the suspension bridge and the boom according to any one of claims 1 to 7, and further comprising the following steps: s1, a displacement sensor is arranged on a first supporting piece of a first connecting component; S2, repeating the step S1, wherein corresponding displacement sensors are arranged on the first supporting pieces of all the first connecting components, and the first connecting plates of the first connecting components are arranged on the cable clamps; S3, repeating the step S2, installing a first connecting assembly at the positions of cable clamps of all suspenders of the suspension bridge, which are connected with the main cable, and adjusting the position of each displacement sensor through a universal joint to enable each displacement sensor to be vertical to the horizontal plane; S4, connecting cable clamps on two sides of one suspender of the suspension bridge through auxiliary cables, connecting a clamping ring on the second connecting component to be clamped with the auxiliary cables, and indirectly connecting the displacement sensor with the auxiliary cables through the connecting clamping ring; s5, repeating the step S4, wherein auxiliary ropes are connected to the rope clamps of all suspenders of the suspension bridge, which are connected with the main rope, displacement sensors monitor displacement between the auxiliary ropes and the intersection point of the main rope according to preset frequency, the monitored displacement information is transmitted to a central processing unit, the central processing unit takes the first displacement information transmitted by the displacement sensors as initial displacement, and the displacement information subsequently transmitted by the displacement sensors as second displacement information; And S6, comparing the second displacement information with the first displacement information by the central processing unit to obtain the relative displacement of the intersection point of the main cable, and if the relative displacement of the intersection point of the main cable is larger than a preset threshold value, controlling the alarm to send out an acousto-optic signal by the central processing unit.
9. The method for measuring displacement of intersection of main cable and boom of suspension bridge as claimed in claim 8, wherein S1 further comprises the steps of: And S101, a displacement sensor electronic bin is positioned in the through hole, a displacement sensor cable is connected with the displacement sensor electronic bin through the through hole, a connecting disc is sleeved on a displacement sensor measuring rod through a strip-shaped hole, the connecting disc is connected with a second support column through a bolt, the displacement sensor measuring rod is connected with a first nut, and the first nut is abutted to the upper surface of the connecting disc.
10. The method for measuring displacement of intersection of main cable and boom of suspension bridge as claimed in claim 8, wherein S2 further comprises the steps of: S201, when a second nut is not installed on a cable clamp bolt, a first connecting plate is sleeved on the cable clamp bolt, the first connecting plate is attached to a bolt connection plane of the cable clamp, a spring is stretched, a second limiting column is positioned in the first limiting column, the inner surface of the second limiting column and the inner surface of the first limiting column are attached to the outer side surface of the cable clamp, two limiting pieces are matched with the cable clamp to limit the first connecting plate, and then the first connecting plate is limited on the bolt connection plane of the cable clamp through the connection of the second nut and the cable clamp bolt; When the second nut is installed on the cable clamp bolt, the first connecting plate is sleeved on the cable clamp bolt, the second limiting columns are abutted to the bolt connection plane of the cable clamp, the first limiting columns are attached to the outer side face of the cable clamp, the two second limiting columns are matched to provide support for the first connecting plate, the two first limiting columns are matched with the cable clamp to limit the first connecting plate, and the first connecting plate is limited on the cable clamp through the third nut and the cable clamp bolt.

Description

Measuring system and measuring method for measuring displacement of intersection point of main cable and suspender of suspension bridge Technical Field The invention relates to the technical field of suspension bridge measurement, in particular to a measurement system and a measurement method for measuring the displacement of the intersection point of a main cable and a suspender of a suspension bridge. Background The suspension bridge comprises a main cable and a plurality of suspension rods arranged at intervals, the suspension rods are connected with the main cable through cable clamps, and the intersection point of the main cable is the joint of the main cable and the corresponding suspension rod. The suspender is used as a key component for connecting a main cable and a main girder of the suspension bridge, and the safety performance of the suspender directly determines the overall stability of the bridge structure. However, due to the long-term composite actions of alternating load, environmental corrosion, material fatigue and the like, internal damage (such as broken steel wires and loose anchoring areas) is often difficult to find through visual inspection, and the health state of the hanger rod needs to be estimated by monitoring the change of the axial force (i.e. the hanger rod force) of the hanger rod in real time. However, the existing boom force monitoring technology faces multiple challenges, such as that the sensor needs to be installed to interrupt traffic and has insufficient durability (such as that a vibrating string sensor is easy to be subjected to electromagnetic interference, a magnetic flux sensor needs to be embedded in advance and has high cost), and signal noise interference under dynamic load is serious (the vibration caused by the vehicle can cover the force change caused by tiny damage). Aiming at the problems, a measuring system and a measuring method capable of conveniently and accurately monitoring health conditions of the suspender at any time are urgently needed. Disclosure of Invention In order to overcome the defects of the prior art, one of the purposes of the invention is to provide a measuring system for measuring the displacement of the intersection point of a main cable of a suspension bridge and a suspender, which can conveniently and accurately monitor the health condition of the suspender at any time. The technical scheme includes that the measuring system for measuring the displacement of the intersection point of a main cable and a boom of a suspension bridge comprises a plurality of first connecting components, a plurality of displacement sensors, a plurality of auxiliary cables and a central processing unit, wherein the first connecting components are connected with a suspension bridge cable clamp, the first connecting components are used for placing the displacement sensors and keeping the displacement sensors in a vertical state all the time, the two ends of the auxiliary cables are respectively connected with the intersection points of the main cables on two sides of the boom through the corresponding first connecting components, the magnetic rings on the displacement sensors are provided with second connecting components for enabling the magnetic rings to clamp and limit the auxiliary cables, the displacement sensors are used for monitoring the displacement between the intersection point of the main cable and the auxiliary cables above the intersection point of the main cable, and the central processing unit is used for receiving and processing the displacement information monitored by the displacement sensors; The displacement sensor transmits the monitored displacement information between the intersection point of the main cable and the auxiliary cable above the intersection point of the main cable to the central processing unit according to the preset frequency, the displacement sensor is provided with a positioning module, the positioning module transmits the three-dimensional coordinate information of the displacement sensor to the central processing unit according to the preset frequency, and the central processing unit analyzes the three-dimensional coordinates of the displacement sensor at different moments. In the scheme, the auxiliary rope is pre-tensioned to be in a straight line state. In this scheme, first coupling assembling is connected with corresponding suspension bridge cable clamp, all install first coupling assembling on the cable clamp on the suspension bridge, be connected through the auxiliary rope straight line that is connected with corresponding first coupling assembling between the cable clamp of one of them jib both sides of suspension bridge, this auxiliary rope is located this jib and main rope junction top, namely is located the corresponding cable clamp top of this jib, displacement sensor passes through first coupling assembling and is connected with the cable clamp, the last magnetic ring of displacement sensor passes t