Handheld video acquisition device for detecting small bridges and culverts on roads

Abstract

The invention relates to a handheld video acquisition device for detecting small bridges and culverts on roads. The handheld video acquisition device comprises a wheel type ranging encoder 1, a pulleyconnecting shaft 2, a camera 3, a vertical camera bracket 4, a transverse bracket 5, a defect marking component 6, a right pulley 7, a wheel type ranging encoder vertical bracket 8, a first-section detection rod 9, an angle adjusting joint at the front end of the transverse bracket 10, an angle adjusting joint in the middle of the transverse bracket 11, a vertical rotating joint 12, a vertical rotating joint on the detection rod 13, a second-section longitudinal vertical detection rod 14, a third-section longitudinal vertical detection rod 15, a fourth-section longitudinal vertical detectionrod 16, an emission box 17, a control button 18, a power supply 19, a storage device 20, a camera data transmission line 21, an encoder data transmission line 22, a data transmission and power supplycable 23, a defect marking component control line 24, and a fighting belt 25. The device carries out video image recording in the whole detection process, can mark defect positions, and has strong field adaptability, high safety, good energy conservation, simple operation and low maintenance cost.

Description

technical field [0001] The invention relates to a hand-held video acquisition device for detection of small bridges and culverts in highways, belonging to the technical field of detection equipment for small bridges and culverts. Background technique [0002] A culvert is a small ground structure set up when the roadbed passes through a depression or crosses a ditch (canal). According to the "Technical Standards for Highway Engineering", the single-hole span of a culvert is less than 5 meters. The bridge is a kind of overhead artificial passage, which consists of two parts: the upper structure and the lower structure. According to the "Technical Standards for Highway Engineering", the single-hole span of the small bridge is greater than or equal to 5 meters and less than 20 meters. The field of application of the present invention is mainly aimed at following four types of road bridges and culverts: 1, bridges and culverts under construction; 3. Some special small bridges a...

AI Technical Summary

Problems solved by technology

There are problems in the bridge inspection vehicle method: 1. Lack of complete video image records. During the inspection process, the appearance quality of concrete can only be inspected visually by the inspectors. There is a lack of relevant video image data. When the inspectors are tired, defects are prone to missed judgments, which cannot be objectively reflected. The overall quality of the concrete appearance of the upper part of the small bridge under inspection; 2. Poor adaptability to the inspection site, low work efficiency, and many limitations due to objective conditions; 3. Poor safety, inspectors are vulnerable to lightning strikes, high-altitude falls, mechanical impacts, wild bees and ants, etc. accident injury

There have been many detection casualties in China; 4. The effect of energy saving and emission reduction is poor and consumes a lot of resources; 5. The flexibility of on-site detection is poor. : canals, embankments, pipelines, etc.) cannot be detected

6. It is impossible to inspect the culvert project, because the length of the bridge inspection frame of the bridge inspection vehicle is greater than the length of the single span of the culvert, so the bridge inspection frame cannot enter the interior of the culvert

There are problems in the drone method: 1. It is impossible to accurately locate the defect location and lack of marking function

During the detection process, the UAV will be disturbed by external factors such as airflow, geomagnetic field, obstacles, etc. When defects are found, due to the lack of marking function, it is difficult for review personnel and repair personnel to accurately locate the specific location of defects on small bridges and culverts

2. The operation is difficult

There are problems with the robotic arm method: 1. The position of the defect cannot be accurately located, and the marking function is lacking. During the detection process, the mechanical arm carries a camera to take pictures of the defect. When a defect is found, due to the lack of marking function, it is difficult for reviewers and repair personnel to accurately locate the defect. Specific locations on small bridges and culverts

2. The high cost of maintenance in the later stage is not convenient for large-scale application. During the use of the robot arm, the motor, hydraulic system, battery and other components have a limit on the number of times of use. Inadequate use and maintenance in the later period may easily cause damage to the robot arm. Therefore, During the use of the mechanical arm, it needs regular maintenance and replacement and replacement of spare parts; 3. The flexibility of on-site inspection is poor. For example, when there are obstacles under the bridge or in the culvert (for example: canals, embankments, pipelines, etc.), the robotic arm cannot enter under the bridge or in the culvert for detection

4. The effect of energy saving and emission reduction is poor and consumes a lot of resources

When the robot arm is used for inspection, the movement of the robot arm device needs to be pulled by a tractor. During the inspection process, part of the lane will be occupied, which will affect the passage of vehicles on the bridge deck.

There are problems in the climbing method: 1. There is a lack of complete video image records. During the inspection process, the appearance quality of concrete can only be inspected visually by the inspectors. There is a lack of relevant video image data. When the inspectors are tired, defects are prone to missed judgments, and it cannot objectively reflect the quality of the concrete. Check the overall quality of the concrete appearance on the upper part of small bridges or culverts; 2. Poor adaptability to the test site, low work efficiency, and many limitations due to objective conditions; 3. Poor safety, and testers are vulnerable to accidents caused by falling from high altitudes

Through literature search, there is no public report identical with the patent of the present invention

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