JP-7855203-B1 - Self-propelled road inspection device

Abstract

【assignment】 The inspection device will be able to transmit and receive elastic waves and electromagnetic waves at the same location while it is continuously in motion. [Solution] A self-propelled road inspection device 1 that inspects the road surface while driving, comprising a vehicle body 20 having a driving device 30 that travels at a constant speed, measuring equipment 50 for measuring abnormalities inside the road, and a reciprocating device 40 attached to the bottom of the vehicle body that moves the measuring equipment back and forth parallel to the direction of travel of the vehicle body, wherein the measuring equipment and the reciprocating device are loaded onto the vehicle body, and while driving, the measuring equipment is moved in the opposite direction at the same speed as the vehicle body by the reciprocating device, so that the measuring equipment can be temporarily stationary relative to the ground for measurement. [Selection Diagram] Figure 1

Inventors

• 内藤 英樹
• 片岡 充英
• 加藤 諒
• 池田 昂矢
• 松橋 貫次
• 栗原 陽一
• 白土 静雄

Assignees

• 国立大学法人東北大学
• 株式会社ネクスコ・エンジニアリング東北
• 株式会社オンガエンジニアリング

Dates

Publication Date

20260508

Application Date

20241119

Claims (8)

1. In an inspection device that inspects the road surface while driving, A vehicle body (20) having a running gear (30) that travels at a constant speed, A measuring device (50) for measuring abnormalities inside the road, The vehicle body is equipped with a reciprocating device (40) attached to the bottom surface of the vehicle body, which moves the measuring instrument back and forth parallel to the direction of travel of the vehicle body, The measuring instrument and the reciprocating device are mounted on the vehicle body. While the vehicle is in motion, the reciprocating device moves the measuring instrument in the opposite direction at the same speed as the vehicle's speed, allowing the measuring instrument to temporarily stop relative to the ground for measurement. Self-propelled road inspection device.
2. When the measuring instrument is moved from the front to the rear of the vehicle body by the reciprocating device and stationary relative to the ground, the measuring instrument is lowered so that it touches the ground. When the reciprocating device returns the measuring instrument from the rear to the front of the vehicle body, the measuring instrument is raised so that it is away from the road surface. It is further equipped with a lifting mechanism (51), The self-propelled road inspection device according to claim 1.
3. When the reciprocating device returns the measuring instrument from the rear to the front of the vehicle body, the measuring instrument is moved at a speed faster than the vehicle body's travel speed. The self-propelled road inspection device according to claim 1.
4. The vehicle body is provided with tracks (31) as a means of running the vehicle. The inspection apparatus according to claim 1.
5. The aforementioned vehicle body consists of an upper vehicle body (21) and a lower vehicle body (22). The upper body is equipped with control equipment and a battery, The lower body is equipped with the measuring instrument and the reciprocating device, The upper and lower body are configured to be combined during inspection runs, and to be separated during transport. The self-propelled road inspection device according to claim 1.
6. A vehicle body (20) having a running gear (30) that travels at a constant speed, A measuring device (50) for measuring abnormalities inside the road, A self-propelled road inspection device (1) is equipped with a reciprocating device (40) mounted on the underside of the vehicle body that moves a measuring instrument back and forth parallel to the direction of travel of the vehicle body, The measuring instrument is placed in contact with the road surface, While the self-propelled road inspection device is moving, the reciprocating device moves the measuring instrument in the reverse direction at the same speed as the vehicle's speed, so that the measuring instrument temporarily stops relative to the ground to perform measurements. Before the self- propelled road inspection device reaches the next measurement position, the measuring instrument is moved forward by the reciprocating device. Road inspection methods.
7. By the lifting mechanism (51), When the measuring instrument is moved from the front to the rear of the vehicle body by the reciprocating device and stationary relative to the ground, the measuring instrument is lowered so that it touches the ground. When the reciprocating device returns the measuring instrument from the rear to the front of the vehicle body, the measuring instrument is raised so that it is away from the road surface. The road inspection method according to claim 6.
8. When the reciprocating device returns the measuring instrument from the rear to the front of the vehicle body, the measuring instrument is moved at a speed faster than the vehicle body's travel speed. The road inspection method according to claim 7.

Description

This invention relates to an inspection device for checking for abnormalities underground, and more specifically, to a self-propelled road inspection device that can temporarily stop measuring instruments at a measurement point while driving. The typical cross-sectional configuration of a road is as follows: in the case of asphalt pavement, as shown in the cross-sectional diagram of Figure 7, the layers from top to bottom are: surface layer (dense-graded asphalt concrete), base layer (coarse-density asphalt concrete), upper subbase (grade-adjusted crushed stone), lower subbase (cut gravel), and subgrade. In the case of concrete pavement, as shown in the cross-sectional diagram of Figure 8, the layers are: surface layer (cement concrete slab), subbase (gravel), and subgrade. In the case of bridges, as shown in the cross-sectional diagram of Figure 9, the layers are: surface layer, bridge leveling layer, deck waterproofing layer, and deck. In roads constructed with multiple layers like these, buried objects and pipes may be present. Furthermore, voids, loosening, and separation between layers can occur. These can lead to future road depressions and sinkholes, potentially causing accidents and endangering vehicles. Therefore, road laws and other regulations mandate regular road inspections. Traditionally, various methods have been used for underground inspection, including seismic wave exploration (impact sounding), ground-penetrating radar exploration, high-density surface wave exploration, horizontal magnetic exploration, electrical exploration, and EM (electromagnetic methods). Ground-penetrating radar (GPE) surveys work by emitting electromagnetic waves (pulsed waves) from the ground surface into the ground. Areas in the ground where the electrical properties change act as reflection surfaces for these electromagnetic waves, and the reflected waves return to the ground surface. By detecting these reflected waves with radar, the location of the target can be determined from the round-trip time from when the radio waves were emitted until they returned, and from the direction of the radio wave irradiation. This method allows for non-destructive exploration of shallow underground ground structures, buried objects, cavities, and other features. As a technology for inspecting underground roads, for example, as described in Patent Document 1, "Road Inspection Vehicle," a road inspection vehicle for performing road inspection methods has been proposed, which includes a visible light imaging unit for capturing visible light images of the object to be inspected, an infrared imaging unit for capturing infrared images of the object to be inspected, a shape measurement unit for measuring the shape of a structure or equipment based on the reflected light of scanning light projected from a light projection unit, a driving sound detection unit for detecting sounds generated as the vehicle moves, a vibration detection unit for detecting vibrations generated as the vehicle moves, a permeability detection unit for detecting the permeability of the pavement surface based on the attenuation of sound waves irradiated onto the pavement surface, and a storage means for storing inspection information collected by the visible light imaging unit, infrared imaging unit, shape measurement unit, driving sound detection unit, vibration detection unit, or permeability detection unit in association with location information. Japanese Patent Publication No. 2011-242293 Side view of the self-propelled road inspection device of the present invention.A side view of the self-propelled road inspection device of the present invention in a separated state.Bottom view of the self-propelled road inspection device of the present invention.A schematic diagram illustrating the process of taking measurements while the vehicle is in motion.Flowchart for conducting inspections.A perspective view of the self-propelled road inspection device of the present invention.A cross-sectional view showing the condition of the asphalt pavement.A cross-sectional view showing the condition of the concrete pavement.A cross-sectional view showing the condition of the bridge's pavement.A schematic diagram illustrating the measurement process using conventional inspection equipment. An example of the implementation of the self-propelled road inspection device of the present invention will be explained with reference to the figures. <Overview> Figure 1 is a side view of the self-propelled road inspection device 1 of the present invention, seen through a translucent lens. The self-propelled road inspection device 1 consists of a vehicle body 20, a running gear 30, a reciprocating gear 40, and measuring instruments 50. The reciprocating gear 40 is mounted on the underside of the vehicle body 20, which has the running gear 30, and the measuring instruments 50 are attached to the reciprocating gear 40 to perform measurements while the vehicle is moving. The operator of the se