阅读说明：本技术 简支板梁桥防落梁监测系统 (Simply support roof beam bridge and prevent roof beam monitoring system that falls ) 是由 刘汉勇 程寿山 丁罕 张志韬 张立业 陈可 李茜 刘靖 于 2020-06-22 设计创作，主要内容包括：本发明公开了一种简支板梁桥防落梁监测系统,其通过传感器装置获取桥梁结构数据进行分类识别判断以监测桥梁结构的健康状况,传感器装置包括多个松动检测装置,其分布在两块相邻的空心板梁连接处,松动检测装置包括松动检测投光器和松动检测受光器,每个松动检测装置的松动检测投光器以相邻两块空心板梁之间的铰缝为对称轴,与对应的松动检测受光器镜面对称设置,在铰缝有效连接相邻两块空心板梁时,每个松动检测装置的松动检测投光器能沿直线方向对射到对应的松动检测受光器上。本发明在松动检测受光器接受到和没接受到红外线光束的两种不同情况下,发送不同的检测信号,实现对铰缝连接作用失效的监测,预防空心板梁断裂脱落的灾害发生。(The invention discloses a beam falling prevention monitoring system of a simply supported plate beam bridge, which acquires bridge structure data through a sensor device to perform classification, identification and judgment so as to monitor the health condition of a bridge structure, wherein the sensor device comprises a plurality of looseness detection devices which are distributed at the joint of two adjacent hollow plate beams, each looseness detection device comprises a looseness detection light projector and a looseness detection light receiver, the looseness detection light projector of each looseness detection device takes a hinge joint between the two adjacent hollow plate beams as a symmetry axis and is arranged in mirror symmetry with the corresponding looseness detection light receiver, and when the hinge joint effectively connects the two adjacent hollow plate beams, the looseness detection light projector of each looseness detection device can be shot to the corresponding looseness detection light receiver along a straight line direction. The invention sends different detection signals under two different conditions that the loosening detection light receiver receives and does not receive infrared beams, realizes the monitoring of the failure of the hinge joint connection effect, and prevents the occurrence of the disaster that the hollow plate beam breaks and falls off.)

1. The system comprises a sensor device for acquiring bridge structure data, a bridge structure data storage system, a bridge structure data local processing system, a bridge structure data wireless communication system and a bridge structure data background early warning system; it is characterized in that the preparation method is characterized in that,

the sensor device is a plurality of loosening detection devices, each loosening detection device comprises a loosening detection light projector and a loosening detection light receiver, the loosening detection light projector can emit a single infrared light beam after being electrified, when the loosening detection light receiver receives the infrared light beam, a relay coil in the loosening detection light receiver is not electrified, and otherwise, the relay coil is electrified; under two different conditions that the loosening detection light receiver receives infrared beams and does not receive the infrared beams, different detection signals are sent to a bridge structure data storage system and serve as data for judging whether the joint of two adjacent hollow plate beams is loosened or shifted;

the looseness detection light projector of each looseness detection device takes a hinge joint between two adjacent hollow plate beams as a symmetry axis and is arranged in mirror symmetry with the corresponding looseness detection light receiver; when the hinge joint effectively connects two adjacent hollow plate beams, the looseness detection light projector of each looseness detection device can be shot to the corresponding looseness detection light receiver along the linear direction; when the hinge joint between two adjacent hollow plate beams fails, the two adjacent hollow plate beams move or shake up and down relatively, the looseness detection light receiver and the looseness detection light projector are not on an opposite straight line, and light beams of the looseness detection light projector of the looseness detection device cannot be oppositely irradiated on the corresponding looseness detection light receiver.

2. The anti-falling beam monitoring system of a simple plate beam bridge as claimed in claim 1, wherein the plurality of looseness detecting devices are distributed on the web plate at the joint of two adjacent hollow plate beams, specifically: the bottom plate of the web lower extreme of two adjacent hollow slab beam junctions respectively is provided with a plurality of recesses, after the hollow slab beam installation, the recess concatenation on the web of two adjacent hollow slab beam junctions is the recess of sharp intercommunication, set up not hard up detection light projector on the recess of one of them hollow slab beam of two adjacent hollow slab beams, set up not hard up detection photic ware on the recess of another hollow slab beam, when the hinge joint is effectual to be connected two adjacent hollow slab beams, not hard up detection light projector can be along the recess of sharp intercommunication to shooting not hard up detection photic ware on.

3. The anti-falling beam monitoring system of the simple plate beam bridge as claimed in claim 1, wherein the distributed arrangement of the plurality of looseness detection devices on the web plate at the joint of two adjacent hollow plate beams specifically comprises: the web at the joint of the two adjacent hollow plate beams is provided with a plurality of linear through holes respectively, after the hollow plate beams are installed, the linear through holes in the web at the joint of the two adjacent hollow plate beams penetrate through the hinge joint to be linearly communicated, the linear through hole of one hollow plate beam of the two adjacent hollow plate beams is provided with a loosening detection light projector, the linear through hole of the other hollow plate beam is provided with a loosening detection light receiver, and when the hinge joint effectively connects the two adjacent hollow plate beams, the loosening detection light projector can be shot onto the loosening detection light receiver along the linear through holes.

4. The beam drop prevention monitoring system of a simple plate beam bridge as claimed in claim 1, wherein the looseness detecting device is composed of a looseness detecting light projector and a looseness detecting light receiver which are respectively arranged at two ends of the inner channel of the black cylinder; the periphery of the black cylinder is sealed, the interior of the black cylinder is a straight smooth internal channel, and the black cylinder is made of silica gel rubber with excellent resilience performance.

5. The simple plate girder bridge girder falling prevention monitoring system of claim 4, wherein the plurality of looseness detecting devices are distributed on a bottom plate at the lower end of a web plate at the joint of two adjacent hollow plate girders, a looseness detecting light projector and a looseness detecting light receiver at two ends in the black cylinder are respectively positioned on the bottom plate at the lower end of the web plate of one of the two adjacent hollow plate girders and on the bottom plate at the lower end of the web plate of the other hollow plate girder, and when the two adjacent hollow plate girders are effectively connected by a hinge joint, the looseness detecting light projector can be oppositely irradiated to the looseness detecting light receiver along a straight and unimpeded inner channel.

6. The simple plate beam bridge girder falling prevention monitoring system according to any one of claims 1 to 5, wherein the looseness detecting light receiver of the looseness detecting means is composed of a first light receiver and a plurality of light receivers surrounding the first light receiver; the looseness detection light projector can emit a single infrared light beam after being electrified, and the looseness detection light projector is oppositely irradiated to a first light receiver of the looseness detection light receiver under the condition that the upper structure of the bridge is not loosened.

7. The beam drop prevention monitoring system of claim 6, wherein the plurality of light receptors are a second light receptor, a third light receptor, a fourth light receptor, a fifth light receptor and a sixth light receptor, the first light receptor is distributed in the middle, and the second light receptor, the third light receptor, the fourth light receptor, the fifth light receptor and the sixth light receptor are uniformly arranged around the plane of the first light receptor.

8. The simple plate beam bridge drop prevention monitoring system of claim 7, wherein when the first light receptor receives the infrared beam, the first relay coil in the looseness detection light receptor is not energized, otherwise, the first relay coil is energized; when the second light receiver receives the infrared beam, the second relay coil in the loosening detection light receiver is not electrified, otherwise, the second relay coil is electrified; when the third light receiver receives the infrared beam, the third relay coil in the looseness detection light receiver is not electrified, otherwise, the third relay coil is electrified; when the fourth light receiver receives the infrared beam, a fourth relay coil in the looseness detection light receiver is not electrified, otherwise, the fourth relay coil is electrified; when the fifth light receiver receives the infrared beam, a fifth relay coil in the looseness detection light receiver is not electrified, otherwise, the fifth relay coil is electrified; when the sixth light receiver receives the infrared beam, the sixth relay coil in the looseness detection light receiver is not electrified, otherwise, the sixth relay coil is electrified; the on-off frequency and the on-off movement direction of a plurality of relay coils in the light receiver are detected through loosening and are used as data for judging the loosening degree and the loosening direction of the upper structure of the bridge.

9. The simple plate girder bridge girder falling prevention monitoring system as claimed in any one of claims 1 to 5 or 7 to 8, wherein the bridge structure data storage system is connected with the bridge structure data acquisition system and is used for storing the bridge structure data; the bridge structure data local processing system is connected with the bridge structure data storage system, extracts the bridge structure data, classifies, identifies and judges the multidimensional data, and quickly gives a local alarm and reports the alarm to the bridge structure data background early warning system through the bridge structure data wireless communication system if the bridge structure data are judged to be obviously abnormal; and if the bridge structure data are not judged to be obviously abnormal, the bridge structure data are sent to the bridge structure data background early warning system through the bridge structure data wireless communication system, and the bridge structure data background early warning system is used for evaluating and predicting the loosening state of the bridge structure.

Technical Field

The invention relates to the technical field of bridge structure monitoring. More specifically, the invention relates to an anti-falling beam monitoring system for a simple supported plate beam bridge.

Background

The simple plate girder bridge generally comprises bridge piers, girders and bridge deck pavement formed on the girders, the upper structure of the bridge mainly comprises plate girders, box girders and T-shaped girders, which refer to the section form of the girders of the bridge, and the beam bridges comprise I-shaped plate girders, hollow plate girders and the like according to the form. The hollow slab beam bridge has the advantages of simple prefabrication process, convenience in installation, low manufacturing cost, small building height and the like, so that the hollow slab beam bridge is widely applied to various highway projects. The upper transverse plate of the hollow plate beam is a top plate, the lower transverse plate of the hollow plate beam is a bottom plate, vertical plates on two sides of the hollow plate beam are web plates, the web plates mainly bear shearing force, hinge joints (namely hinge joints are arranged between two adjacent hollow plate beams) are arranged between the web plates of two adjacent hollow plate beams, the hinge joints are post-cast concrete or pouring joints between the prefabricated plate beams in bridge engineering, the two adjacent hollow plate beams are connected, and the hinge joints between the hollow plate beams are important joint parts which directly relate to the whole stress performance of a bridge deck system and the service quality of a pavement layer. The action from the vehicle can not be distributed in a full-bridge manner, but directly acts on a certain hollow plate girder of the bridge, and in the past, overload bearing is added, so that hinge joints can be damaged, the connecting acting force of the hinge joints on two adjacent plate girders is continuously weakened, and disasters such as bridge breakage and falling of the plate girder bridge can be easily caused if the disasters are not discovered and maintained and managed in time. The single hollow plate beam often bears acting force, particularly directly bears overload acting force, so that the hinge joint connecting action between two adjacent hollow plate beams is weakened, the actual stress condition is separated from the originally supposed whole stress system of the beam plate, the stress distribution between the beam plates is more uneven, and the further damage of the hinge joint is accelerated. The stress of the single hollow plate beam of the beam plate is caused due to the fact that the stress of the single hollow plate beam of the beam plate cannot be transversely coordinated between the beam plates of the bridge, the two adjacent hollow plate beams are loosened, the bottom surfaces of the beam plates are bent or cracked, concrete and reinforcing steel bars of the beam body enter a fatigue period in advance, the bridge is further bent downwards, the concrete on the upper portion of the beam is broken, the beam plates lose a bearing function, and serious disasters such as breakage, breakage and falling occur. Therefore, there is a need for monitoring the weakening or failure of the hinge joint connection of a plate girder bridge.

Disclosure of Invention

The invention provides a simple support plate girder bridge anti-falling monitoring system aiming at the problem that the connection effect of a hinge joint of a plate girder bridge cannot be weakened or failed at present.

The invention realizes the monitoring of weakening or failure of the hinge joint connection effect of two adjacent hollow plate beams, and timely warns when two hollow plate beams are loosened and displaced due to lack of transverse cooperative stress, thereby avoiding further deterioration of the bridge and preventing the occurrence of disasters of breaking and falling of the bridge.

In order to achieve these objects and other advantages in accordance with the present invention, there is provided a simple supported plate girder bridge drop prevention monitoring system, which includes a sensor device for acquiring bridge structure data, a bridge structure data storage system, a bridge structure data local processing system, a bridge structure data wireless communication system, and a bridge structure data background early warning system;

the sensor device is a plurality of loosening detection devices, each loosening detection device comprises a loosening detection light projector and a loosening detection light receiver, the loosening detection light projector can emit a single infrared light beam after being electrified, when the loosening detection light receiver receives the infrared light beam, a relay coil in the loosening detection light receiver is not electrified, and otherwise, the relay coil is electrified; under two different conditions that the loosening detection light receiver receives infrared beams and does not receive the infrared beams, different detection signals are sent to a bridge structure data storage system and serve as data for judging whether the joint of two adjacent hollow plate beams is loosened or shifted;

the looseness detection light projector of each looseness detection device takes a hinge joint between two adjacent hollow plate beams as a symmetry axis and is arranged in mirror symmetry with the corresponding looseness detection light receiver; when the hinge joint effectively connects two adjacent hollow plate beams, the looseness detection light projector of each looseness detection device can be shot to the corresponding looseness detection light receiver along the linear direction; when the hinge joint between two adjacent hollow plate beams fails, the vehicle directly acts on one hollow plate beam to enable the two adjacent hollow plate beams to move or shake up and down relatively, the hinge joint is taken as a symmetry axis, the looseness detection light projector and the corresponding looseness detection light receiver do not form mirror symmetry, and light beams of the looseness detection light projector of the looseness detection device cannot be oppositely emitted to the corresponding looseness detection light receiver.

Preferably, the distributed arrangement of the plurality of loosening detection devices on the web plate at the joint of two adjacent hollow plate beams specifically comprises: the bottom plate of the web lower extreme of two adjacent hollow slab beam junctions respectively is provided with a plurality of recesses, after the hollow slab beam installation, the recess concatenation on the web of two adjacent hollow slab beam junctions is the recess of sharp intercommunication, set up not hard up detection light projector on the recess of one of them hollow slab beam of two adjacent hollow slab beams, set up not hard up detection photic ware on the recess of another hollow slab beam, when the hinge joint is effectual to be connected two adjacent hollow slab beams, not hard up detection light projector can be along the recess of sharp intercommunication to shooting not hard up detection photic ware on.

Preferably, the distributed arrangement of the plurality of loosening detection devices on the web plate at the joint of two adjacent hollow plate beams specifically comprises: the web at the joint of the two adjacent hollow plate beams is provided with a plurality of linear through holes respectively, after the hollow plate beams are installed, the linear through holes in the web at the joint of the two adjacent hollow plate beams penetrate through the hinge joint to be linearly communicated, the linear through hole of one hollow plate beam of the two adjacent hollow plate beams is provided with a loosening detection light projector, the linear through hole of the other hollow plate beam is provided with a loosening detection light receiver, and when the hinge joint effectively connects the two adjacent hollow plate beams, the loosening detection light projector can be shot onto the loosening detection light receiver along the linear through holes.

Preferably, the looseness detecting device is composed of a looseness detecting light projector and a looseness detecting light receiver which are respectively arranged at two ends of an internal channel of the black cylinder; the periphery of the black cylinder is sealed, the interior of the black cylinder is a straight smooth internal channel, and the black cylinder is made of silica gel rubber with excellent resilience performance.

Preferably, the plurality of looseness detecting devices are fixed on a bottom plate at the lower end of a web plate at the joint of two adjacent hollow plate beams in a distributed mode, the looseness detecting light projector and the looseness detecting light receiver at two ends in the black cylinder are respectively located on the bottom plate at the lower end of the web plate of one of the two adjacent hollow plate beams and the bottom plate at the lower end of the web plate of the other hollow plate beam, and when the two adjacent hollow plate beams are effectively connected through hinges, the looseness detecting light projector can be shot onto the looseness detecting light receiver along a straight smooth inner channel.

Preferably, the looseness detecting light receiver of the looseness detecting device is composed of a first light receiver and a plurality of light receivers surrounding the first light receiver; the looseness detection light projector can emit a single infrared light beam after being electrified, and the looseness detection light projector is oppositely irradiated to a first light receiver of the looseness detection light receiver under the condition that the upper structure of the bridge is not loosened.

Preferably, the plurality of light receivers includes a second light receiver, a third light receiver, a fourth light receiver, a fifth light receiver, and a sixth light receiver, the first light receiver is distributed in the middle, and the second light receiver, the third light receiver, the fourth light receiver, the fifth light receiver, and the sixth light receiver are uniformly arranged around the plane of the first light receiver.

Preferably, when the first light receiver receives the infrared beam, the first relay coil in the looseness detection light receiver is not electrified, otherwise, the first relay coil is electrified; when the second light receiver receives the infrared beam, the second relay coil in the loosening detection light receiver is not electrified, otherwise, the second relay coil is electrified; when the third light receiver receives the infrared beam, the third relay coil in the looseness detection light receiver is not electrified, otherwise, the third relay coil is electrified; when the fourth light receiver receives the infrared beam, a fourth relay coil in the looseness detection light receiver is not electrified, otherwise, the fourth relay coil is electrified; when the fifth light receiver receives the infrared beam, a fifth relay coil in the looseness detection light receiver is not electrified, otherwise, the fifth relay coil is electrified; when the sixth light receiver receives the infrared beam, the sixth relay coil in the looseness detection light receiver is not electrified, otherwise, the sixth relay coil is electrified; the on-off frequency and the on-off movement direction of a plurality of relay coils in the light receiver are detected through loosening and are used as data for judging the loosening degree and the loosening direction of the upper structure of the bridge.

Preferably, the bridge structure data storage system is connected with the bridge structure data acquisition system and is used for storing the bridge structure data; the bridge structure data local processing system is connected with the bridge structure data storage system, extracts the bridge structure data, classifies, identifies and judges the multidimensional data, and quickly gives a local alarm and reports the alarm to the bridge structure data background early warning system through the bridge structure data wireless communication system if the bridge structure data are judged to be obviously abnormal; and if the bridge structure data are not judged to be obviously abnormal, the bridge structure data are sent to the bridge structure data background early warning system through the bridge structure data wireless communication system, and the bridge structure data background early warning system is used for evaluating and predicting the loosening state of the bridge structure.

The invention at least comprises the following beneficial effects:

1. the looseness detection device detects whether the joint between two adjacent hollow plate beams is loosened or shifted, when a hinge joint between the two adjacent hollow plate beams is effectively connected with the two adjacent hollow plate beams, a looseness detection light receiver and a looseness detection light projector which are opposite to each other in straight lines on webs of the two adjacent hollow plate beams do not move or shake relatively up and down, the looseness detection light receiver and the looseness detection light projector keep the straight lines opposite to each other, the looseness detection light receiver receives an infrared ray beam, and a relay coil is not electrified; when the hinge joint between two adjacent hollow plate beams fails and a vehicle directly acts on one of the hollow plate beams, the two adjacent hollow plate beams are stressed unevenly, the two adjacent hollow plate beams move or shake up and down relatively, so that the looseness detection light receiver and the looseness detection light projector on the two adjacent hollow plate beams move or shake up and down relatively, the looseness detection light receiver and the looseness detection light projector are not on a correlation straight line, the looseness detection light receiver cannot receive infrared beams, the relay coil is electrified to send different detection signals to the structural data storage system to be used as data for judging whether the joint between the two adjacent hollow plate beams is loosened or shifted, the weakening or failure monitoring of the hinge joint between the two adjacent hollow plate beams is realized, when the two hollow plate beams are loosened and shifted due to lack of transverse cooperative stress, and early warning is carried out in time, further deterioration of the bridge is avoided, and the occurrence of disasters of breaking and falling of the bridge is prevented. For example, the frequency of the on-off of a section of relay coil is sent to a bridge structure data storage system, the condition that the joint between two adjacent hollow plate beams is loosened is judged, and hinge joint weakening or failure early warning is given; for example, a signal for maintaining energization of a relay coil is sent to a bridge structure data storage system, the hinge joint between two adjacent hollow plate beams or the displacement condition that two adjacent hollow plate beams have a high displacement and a low displacement is judged, and hinge joint weakening or failure early warning is given; for example, a signal for maintaining the power failure of a relay coil is sent to a bridge structure data storage system, and it is judged that no abnormal condition exists in the hinge joint between two adjacent hollow plate beams.

2. According to the invention, the bottom plate at the lower end of the web plate at the joint of two adjacent hollow plate beams is respectively provided with the plurality of grooves for mounting the loosening detection device, so that the mounting is convenient, and the infrared influence of a plurality of light rays on the loosening detection device is avoided.

3. According to the invention, the web plate at the joint of two adjacent hollow plate beams is respectively provided with a plurality of linear through holes for mounting the looseness detection device, so that the infrared influence of excessive light on the looseness detection device is further avoided, and the sensitivity is improved.

4. According to the black cylinder of the looseness detection device, the looseness detection light projector and the looseness detection light receiver are sealed in the inner pipeline of the black cylinder, so that the detection light projector and the looseness detection light receiver are better waterproof, and stray light or reflection interference is reduced.

5. According to the invention, the on-off frequency and the on-off movement direction among the relay coils in the looseness detection light receiver are used as data for judging the looseness degree and the looseness direction of the upper structure of the bridge, and the higher the on-off frequency among the relay coils is, the farther the on-off movement direction is, the higher the early warning level is, and the early warning of different levels is realized.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

FIG. 1 is a schematic diagram of one implementation form of a simple supported girder bridge drop prevention monitoring system of the present invention;

FIG. 2 is a schematic wiring diagram of an infrared correlation probe;

FIG. 3 is a schematic view of a hollow slab beam of the present invention;

FIG. 4 is a schematic view of a bridge superstructure assembled from a plurality of hollow slab beams;

FIG. 5 is a schematic view of a vehicle traveling on the bridge superstructure of the present invention;

FIG. 6 is a schematic diagram of a second implementation form of the simply supported girder bridge anti-falling monitoring system of the invention;

FIG. 7 is a schematic view of one implementation of a looseness detection apparatus of the present invention;

FIG. 8 is a schematic diagram of a third implementation form of the simple supported plate beam bridge anti-drop monitoring system of the present invention;

FIG. 9 is a schematic view of one implementation of a looseness detection light receptor of the looseness detection apparatus of the present invention;

wherein, the looseness detects the photic device 1; a loosening detection light projector 2; a black cylinder 3; an internal passage 4; a hollow slab beam 5; hinge joint 6; a web 7; a straight through hole 8; a bridge deck 9; a looseness detecting device 10; a top plate 12, a bottom plate 14; a recess 15; a first light receptor 21; a second light receiver 22; a third light receiver 23; a fourth light receptor 24; a fifth light receiver 25; a sixth light receiver 26; the vehicle 27.

Detailed Description

The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.

It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.

Fig. 1-5 show an implementation form of the simple supported plate girder bridge anti-falling monitoring system, wherein the upper transverse plate of the hollow plate girder 5 is a top plate 12, the lower transverse plate is a bottom plate 14, the vertical plates at two sides of the hollow plate girder 5 are web plates 7, the web plates 7 mainly bear shearing force, a hinge joint 6 is arranged between the web plates 7 of two adjacent hollow plate girders 5, the hinge joint 6 is post-cast concrete or pouring joint between the prefabricated plate girders in bridge engineering, the two adjacent hollow plate girders 5 are connected, and the hinge joint 6 between the hollow plate girders 5 is an important joint directly related to the integral stress performance of a bridge deck 9 system and the service quality of a pavement layer. The simply supported plate girder bridge anti-falling monitoring system comprises a sensor device for acquiring bridge structure data, a bridge structure data storage system, a bridge structure data local processing system, a bridge structure data wireless communication system and a bridge structure data background early warning system, wherein the bridge structure data storage system is connected with the bridge structure data acquisition system and is used for storing the bridge structure data; the bridge structure data local processing system is connected with the bridge structure data storage system, extracts the bridge structure data, classifies, identifies and judges the multidimensional data, and quickly performs local early warning and reports the data to the bridge structure data background early warning system through the bridge structure data wireless communication system if the bridge structure data are judged to be obviously abnormal; if the bridge structure data are not judged to be obviously abnormal, the bridge structure data are sent to the bridge structure data background early warning system through the bridge structure data wireless communication system, and the bridge structure data background early warning system is used for realizing the assessment and prediction of the loosening state of the bridge structure;

the sensor device is provided with a plurality of loosening detection devices 10, each loosening detection device 10 comprises a loosening detection light projector 2 and a loosening detection light receiver 1, the loosening detection light projector 2 can emit a single infrared light beam after being electrified, when the loosening detection light receiver 1 receives the infrared light beam, a relay coil in the loosening detection light receiver 1 is not electrified, otherwise, the relay coil is electrified; under two different conditions that the loosening detection light receiver 1 receives infrared beams and does not receive the infrared beams, different detection signals are sent to a bridge structure data storage system and serve as data for judging whether the joint of two adjacent hollow plate beams 5 is loosened or shifted;

the looseness detection light projector 2 of each looseness detection device 10 is arranged on a web 7 at the joint of two adjacent hollow plate beams 5 in a distributed mode, and is arranged in mirror symmetry with the corresponding looseness detection light receiver 1 by taking a hinge joint 6 between the two adjacent hollow plate beams 5 as a symmetry axis; when the hinge joint 6 is effectively connected with two adjacent hollow plate beams 5, the looseness detection light projector 2 of each looseness detection device 10 can be oppositely irradiated to the corresponding looseness detection light receiver 1 along the linear direction; when the hinge joint 6 between two adjacent hollow plate beams 5 fails, when the vehicle 27 directly acts on one of the hollow plate beams 5, the two adjacent hollow plate beams 5 move or shake up and down relatively, so that the looseness detection light receiver 1 and the looseness detection light projector 2 are not on an opposite straight line, and light beams of the looseness detection light projector 2 of the looseness detection device 10 cannot be in opposite incidence on the corresponding looseness detection light receiver 1.

The realization process of the invention is as follows: the looseness detection device 10 detects whether the joint between two adjacent hollow plate beams 5 is loosened or shifted, when the hinge joint 6 between the two hollow plate beams 5 is effectively connected with the two adjacent hollow plate beams 5, the looseness detection light receiver 1 and the looseness detection light projector 2 which are opposite in straight line on the web plate 7 of the two adjacent hollow plate beams 5 do not move or shake up and down relatively, the looseness detection light receiver 1 and the looseness detection light projector 2 keep opposite in straight line, the looseness detection light receiver 1 receives an infrared ray beam, and the relay coil is not electrified; when the hinge joint 6 between two adjacent hollow plate beams 5 fails, when a vehicle 27 directly acts on one of the hollow plate beams 5, the two adjacent hollow plate beams 5 are not stressed uniformly, the two adjacent hollow plate beams 5 move or shake up and down relatively, so that the looseness detection light receiver 1 and the looseness detection light projector 2 on the two adjacent hollow plate beams 5 move or shake up and down relatively, the looseness detection light receiver 1 and the looseness detection light projector 2 are not on opposite straight lines, the looseness detection light receiver 1 cannot receive infrared beams, the relay coil is electrified, different detection signals are sent to a bridge structure data storage system to serve as data for judging whether the joint between the two adjacent hollow plate beams 5 is loosened or shifted, the weakening or failure monitoring of the hinge joint 6 between the two adjacent hollow plate beams 5 is realized, and the two hollow plate beams 5 are loosened due to lack of transverse cooperative stress, When the bridge is shifted, early warning can be timely carried out, further deterioration of the bridge is avoided, and the disaster that the bridge is broken and falls off is prevented. For example, the frequency or the high-low voltage of the on-off of a section of relay coil is sent to a bridge structure data storage system, the condition that the connection part between two adjacent hollow plate beams 5 is loosened is judged, and the weakening or failure early warning of the hinge joint 6 is given; for example, a signal for maintaining energization of a relay coil is sent to a bridge structure data storage system, the hinge joint 6 between two adjacent hollow plate beams 5 or the displacement condition that two adjacent hollow plate beams 5 maintain a high-low state is judged, and early warning of weakening or failure of the hinge joint 6 is given; for example, a signal for maintaining the power failure of the relay coil is sent to a bridge structure data storage system, and it is judged that the hinge joint 6 between two adjacent hollow plate beams 5 has no abnormal condition.

On the basis of the above implementation form, the distributed arrangement of the plurality of looseness detection devices 10 on the web 7 at the joint of two adjacent hollow plate beams 5 is specifically as follows: the structure is characterized in that a plurality of grooves 15 are respectively formed in a bottom plate 14 at the lower end of a web 7 at the joint of two adjacent hollow plate beams 5, after the hollow plate beams 5 are installed, a stop block or a baffle is arranged at the joint of the grooves 15 on the web 7 at the joint of the two adjacent hollow plate beams 5, concrete for crack pouring is prevented from flowing into the grooves 15, the grooves 15 on the web 7 at the joint of the two adjacent hollow plate beams 5 can be spliced into grooves communicated in a straight line, a loosening detection light projector 2 is arranged on the groove 15 of one hollow plate beam 5 of the two adjacent hollow plate beams 5, a loosening detection light receiver 1 is arranged on the groove 15 of the other hollow plate beam 5, and when the two adjacent hollow plate beams 5 are effectively connected through a hinge joint 6, the loosening detection light projector 2 can be shot onto the loosening detection light receiver 1 along the grooves communicated in the straight line. When the hinge joint 6 between two adjacent hollow plate beams 5 fails, when the vehicle 27 directly acts on one of the hollow plate beams 5, the two adjacent hollow plate beams 5 move or shake up and down relatively, the looseness detection light receiver 1 and the looseness detection light projector 2 are not on an opposite straight line, and light beams of the looseness detection light projector 2 of the looseness detection device 10 cannot be in opposite direction to the corresponding looseness detection light receiver 1.

On the basis of the above implementation form, referring to fig. 6, the multiple looseness detecting devices 10 are distributed on the web 7 at the joint of two adjacent hollow slab beams 5, specifically: the web 7 at the joint of two adjacent hollow plate beams 5 is respectively provided with a plurality of linear through holes 8, after the hollow plate beams 5 are installed, the communicated part of the linear through holes 8 on the web 7 at the joint of the two adjacent hollow plate beams 5 is provided with a stop block or a baffle plate, so that the concrete in the crack pouring is prevented from flowing into the linear through holes 8, the linear through holes 8 on the web 7 at the joint of the two adjacent hollow plate beams 5 can penetrate through the hinge joints 6 linearly, the linear through holes 8 of one hollow plate beam 5 of the two adjacent hollow plate beams 5 are provided with the looseness detection light projector 2, the linear through holes 8 of the other hollow plate beam 5 are provided with the looseness detection light receiver 1, and when the hinge joints 6 are effectively connected with the two adjacent hollow plate beams 5, the looseness detection light projector 2 can be shot to the looseness detection light receiver 1 along the linear through holes 8. When the hinge joint 6 between two adjacent hollow plate beams 5 fails, when the vehicle 27 directly acts on one of the hollow plate beams 5, the two adjacent hollow plate beams 5 move or shake up and down relatively, the looseness detection light receiver 1 and the looseness detection light projector 2 are not on an opposite straight line, and light beams of the looseness detection light projector 2 of the looseness detection device 10 cannot be in opposite direction to the corresponding looseness detection light receiver 1.

The realization process of the invention is as follows: the looseness detection device 10 detects the joint of two adjacent hollow plate beams 5, when a hinge joint 6 between the two adjacent hollow plate beams 5 is effectively connected with the two adjacent hollow plate beams 5, a straight through hole 8 through which the two adjacent hollow plate beams 5 are linearly communicated does not generate dislocation or shake, the straight through hole 8 of the two adjacent hollow plate beams 5 is kept linearly communicated, the looseness detection light receiver 1 receives an infrared beam, and a relay coil is not electrified; when the hinge joint 6 between two adjacent hollow plate beams 5 fails, when a vehicle 27 directly acts on one of the hollow plate beams 5, the straight through hole 8 through which the two adjacent hollow plate beams 5 are straight is dislocated or shaken, the straight through hole 8 of the two adjacent hollow plate beams 5 cannot be straight through or is blocked, the infrared light beam cannot be received by the looseness detection light receiver 1, the relay coil is electrified, different detection signals are sent to the bridge structure data storage system, the data are used for judging whether the joint of the two adjacent hollow plate beams 5 is loosened or shifted, the monitoring of weakening or failure of the connection of the hinge joint 6 between the two adjacent hollow plate beams 5 is realized, when the two hollow plate beams 5 are loosened and shifted due to lack of transverse cooperative stress, early warning can be timely carried out, further deterioration of the bridge is avoided, and the disaster that the bridge is broken and falls off is prevented.

On the basis of the above implementation form, referring to fig. 7, the looseness detecting device 10 includes a looseness detecting light projector 2, a looseness detecting light receiver 1, and a black cylinder 3, and the looseness detecting device 10 is formed by arranging the looseness detecting light projector 2 and the looseness detecting light receiver 1 at both ends of an internal channel 4 of the black cylinder 3, respectively; the periphery of black drum 3 is sealed, and the inside of black drum 3 is straight line unblocked inner channel 4, and the one end setting of inner channel 4 not hard up detection photic ware, the other end setting not hard up detection light projector 2, black drum 3 adopts the silica gel rubber that resilience performance is good to make.

On the basis of the above implementation form, referring to fig. 8, a plurality of looseness detecting devices 10 are distributed on a bottom plate 14 at the lower end of a web 7 at the joint of two adjacent hollow plate beams 5, the looseness detecting light projector 2 and the looseness detecting light receiver 1 at two ends in the black cylinder 3 are respectively located on the bottom plate 14 at the lower end of the web 7 of one hollow plate beam 5 of the two adjacent hollow plate beams 5 and on the bottom plate 14 at the lower end of the web 7 of the other hollow plate beam 5, and when the hinge joint 6 effectively connects the two adjacent hollow plate beams 5, the looseness detecting light projector 2 can be shot to the looseness detecting light receiver 1 along the straight smooth inner channel 4. When the hinge joint 6 between two adjacent hollow plate beams 5 fails, when the vehicle 27 directly acts on one of the hollow plate beams 5, the two adjacent hollow plate beams 5 move or shake up and down relatively, the looseness detection light receiver 1 and the looseness detection light projector 2 are not on an opposite straight line, and light beams of the looseness detection light projector 2 of the looseness detection device 10 cannot be in opposite direction to the corresponding looseness detection light receiver 1.

On the basis of the above implementation, referring to fig. 9, the looseness detection light receiver 1 of the looseness detection device 10 is composed of a first light receiver 21 and a plurality of light receivers surrounding the first light receiver 21; the looseness detecting light projector 2 can emit a single infrared light beam after being electrified, and the looseness detecting light projector 2 is oppositely irradiated to the first light receiver 21 of the looseness detecting light receiver 1 under the condition that the upper structure of the bridge is not loosened.

In addition to the above-described embodiment, the plurality of light receivers are a second light receiver 22, a third light receiver 23, a fourth light receiver 24, a fifth light receiver 25, and a sixth light receiver 26, the first light receiver 21 is distributed in the middle, and the second light receiver 22, the third light receiver 23, the fourth light receiver 24, the fifth light receiver 25, and the sixth light receiver 26 are uniformly arranged around the plane of the first light receiver 21.

On the basis of the above implementation form, when the first light receiver 21 receives the infrared beam, the first relay coil in the looseness detection light receiver 1 is not energized, otherwise, the first relay coil is energized; when the second light receiver 22 receives the infrared beam, the second relay coil in the looseness detection light receiver is not electrified, otherwise, the second relay coil is electrified; when the third light receiver 23 receives the infrared beam, the third relay coil in the looseness detection light receiver is not electrified, otherwise, the third relay coil is electrified; when the fourth light receiver 24 receives the infrared beam, the fourth relay coil in the looseness detection light receiver is not electrified, otherwise, the fourth relay coil is electrified; when the fifth light receiver 25 receives the infrared beam, the fifth relay coil in the looseness detection light receiver is not electrified, otherwise, the fifth relay coil is electrified; when the sixth light receptor 26 receives the infrared beam, the sixth relay coil in the looseness detection light receptor is not electrified, otherwise, the sixth relay coil is electrified; the on-off frequency and the on-off movement direction of a plurality of relay coils in the light receiver are detected through loosening and are used as data for judging the loosening degree and the loosening direction of the upper structure of the bridge. Therefore, the higher the power-on and power-off frequency among the relay coils is, the farther the power-on and power-off movement direction is, the higher the early warning level is, so that the beam falling prevention monitoring system has early warnings of different levels.

While embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields of adaptation of the invention, and further modifications can be easily implemented by those skilled in the art, so that the invention is not limited to the specific details and the examples shown herein, without departing from the general concept defined by the claims and the scope of equivalents.