Filler inspection system

Abstract

To solve the problem of conventional technology, namely, to provide a filer inspection system that can perform the workmanship inspection of the filler filled in a strip-shaped connection space more easily than conventional technology.SOLUTION: A filler inspection system of the present invention is a system for inspecting the finished shape of a filler filled in a belt-like adjoining space generated between adjacent plate-like members and is provided with a traveling body, a distance measuring means, and a finished shape determining means. Distance measuring means measures the surface height of one side line by irradiating a laser from one plate-like member adjacent to the other plate-like member to the line shape of the other plate-like member, and finished shape determining means calculates the height difference between the surface of the plate-like member and the surface of the filler from the surface height of the one side line and compares it with an allowable range to determine the finished shape of the filler as defective.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a filler filled in a band-shaped space, and more specifically, to a filler inspection system capable of inspecting the finished shape of a filler by irradiating a laser in a line shape while traveling.

Background Art

[0002] In Japan, most of the country's land is occupied by mountainous areas with steep terrain, so most roads developed in rural areas are provided with bridges. On the other hand, countless structures are densely arranged in urban areas, so when planning a new road there, viaducts, overpasses and the like are still required. Bridges are extremely important structures without needing to consider their social impact in the event of damage. For this reason, bridges have long been strictly designed in accordance with regulations such as "Road Bridge Specifications and Commentaries (Japan Road Association)" and constructed with high quality. While such high quality is required, bridges have come to be required to be constructed in a shorter period of time and more economically due to social demands and advances in technical capabilities.

[0003] Floor slabs constituting the superstructure of a bridge are naturally installed when the bridge is newly constructed, and may also be installed when repairing an existing bridge. In recent years, repair work for existing bridges has been frequently carried out, and along with this, there has been a movement to replace floor slabs with ones that are easy to maintain, for example. In any case, rapid construction is required for bridge work. For example, viaducts such as expressways handle a huge volume of traffic, so considering the economic loss caused by stopping service, it is necessary to complete the construction as soon as possible.

[0004] For the reasons described above, precast concrete deck slabs have come to be widely used for bridge decks. Here, "precast" refers to the process of manufacturing products or components in advance at a location different from the construction site, such as a factory or manufacturing yard. Concrete deck slabs manufactured using this precasting method are called "precast concrete deck slabs." Conventional cast-in-place concrete construction methods required the construction site to be occupied for a long period, from formwork installation to concrete pouring and curing. In contrast, with precast concrete deck slabs, manufacturing takes place in a factory and they can be easily installed, thus shortening the period the construction site needs to be occupied.

[0005] On the other hand, precast concrete slabs cannot be made into very large members because they are transported on public roads from the manufacturing site to the construction site. Therefore, multiple precast concrete slabs are arranged in the direction of the bridge axis (or perpendicular to the bridge axis), and a strip-shaped gap (hereinafter referred to as the "joint space") is created between adjacent precast concrete slabs. Typically, the necessary amount of reinforcing steel is placed in this joint space, and then concrete or mortar is used to fill the gap, thus forming a joint and connecting the precast concrete slabs. Various improvement technologies have been proposed regarding the structure and construction method of this joint, and for example, Patent Document 1 proposes a joint structure that can be formed easily, in a short period of time, and at low cost. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2012-225144 [Overview of the project] [Problems that the invention aims to solve]

[0007] Precast concrete slabs, being manufactured in a factory, have surfaces that are highly precise and flat. In contrast, the concrete used to fill the joint spaces is cast in place, making it unavoidable that it will have some degree of unevenness. Therefore, it is common practice to inspect the shape and dimensions (i.e., the finished product) of the filled concrete. For example, the "Guidelines for Substrate Treatment of Floor Slab Waterproofing (East Nippon Expressway Co., Ltd.)" stipulates that the difference in height between the precast concrete slab and the filled section should be "no difference in height of 3 mm or more, and the surface should be smooth," and this inspection is to be carried out using a shape gauge (a device that measures the shape by pressing a row of needles against an uneven surface). However, although this gauge can measure the shape of the unevenness, it cannot directly calculate the amount of the height difference, so it is necessary to separately measure the shape of the unevenness on the gauge using a measuring instrument such as calipers. As a result, the inspection of the finished product of the filled concrete is time-consuming and laborious, places a heavy burden on the inspector, and even carries the risk of overlooking measurement errors or defects. Furthermore, since the form-taking gauge is used to inspect the concrete in direct contact, the needle can penetrate the concrete when it is still soft immediately after filling, making inspection impossible. Therefore, inspection must be carried out after the concrete has hardened. However, if defects are found in the finished product, corrections such as grinding the hardened concrete surface with a power machine such as a grinder are necessary, which requires a great deal of labor and also creates environmental problems as dust is scattered into the surrounding area.

[0008] The object of the present invention is to solve the problems of the prior art, namely, to provide a filler inspection system that can easily perform a finished inspection of the filler material that has been packed into the strip-shaped gap (hereinafter referred to as the "connection space") between plate-shaped members, compared to the prior art. [Means for solving the problem]

[0009] The present invention focuses on measuring the height difference between a flat precast concrete slab and the filler material by irradiating both with a linear laser, without directly touching the concrete. This invention is based on a novel idea.

[0010] The filler inspection system of the present invention is a system for inspecting the finished shape of filler material packed into a strip-shaped connecting space between adjacent plate-shaped members, and comprises a traveling body, a distance measuring means, and a finished shape determination means. The traveling body is either manually pushed or self-propelled and travels in the axial direction of the connecting space. The distance measuring means installed on the traveling body is a means for measuring distance based on a laser irradiated onto the filler material, and the finished shape determination means is a means for determining whether the finished shape of the filler material is good or bad. The distance measuring means measures the "surface height of one side line" including parts of the two plate-shaped members and the filler material without contacting the concrete by irradiating a laser in a line in a direction substantially perpendicular (including perpendicular) to the direction of travel of the traveling body, and from a part of one adjacent plate-shaped member to a part of the other plate-shaped member. The finished shape determination means calculates the height difference between the surface of the plate-shaped member and the surface of the filler material from the surface height of the one side line, and determines that the finished shape of the filler material is poor if the height difference exceeds a predetermined allowable range.

[0011] The filler inspection system of the present invention may also be configured such that the distance measuring means includes a left distance measuring means and a right distance measuring means. The left distance measuring means and the right distance measuring means are positioned apart in a direction substantially perpendicular (including perpendicular) to the filler in the direction of travel, with the left distance measuring means irradiating a laser from a part of the plate-shaped member on the left side in the direction of travel to the filler, and the right distance measuring means irradiating a laser from a part of the plate-shaped member on the right side in the direction of travel to the filler.

[0012] The filler inspection system of the present invention may also be configured such that the left distance measuring means and the right distance measuring means are slidable in a direction substantially perpendicular (including perpendicular) to the filler in the direction of travel.

[0013] The filler inspection system of the present invention may also be configured such that the distance measuring means is able to slide up and down.

[0014] The filler inspection system of the present invention may further include a marking means. This marking means is a means for marking the surface of the filler (or plate-shaped member) when the form determination means determines that it is defective.

[0015] The filler inspection system of the present invention may further include a position measuring means and a control means. The position measuring means is a means for measuring the position of the moving body, and the control means is a means for storing defect information in a storage means. The control means stores the defect information along with the position measured by the position measuring means when the finished product determination means determines that the product is defective. [Effects of the Invention]

[0016] The filler inspection system of the present invention has the following effects: (1) The quality of the work can be judged quantitatively without relying on the experience or intuition of the inspector. Therefore, it is not necessary to secure specific individuals such as skilled technicians, and the work can be entrusted to many inspectors. (2) Furthermore, the burden on inspectors is reduced, and inspections can be performed more easily and in a shorter time than before. As a result, labor costs can be reduced and the construction period can be shortened. (3) Furthermore, since the quality of the finished product is judged quantitatively, the chances of missing defective parts can be reduced. (4) Because the finished shape can be measured without direct contact with the concrete, inspections can be performed even when the concrete is still soft immediately after filling. If any defects occur in the finished shape, they can be corrected simply by re-leveling the soft concrete with a trowel or similar tool, significantly reducing the effort required for correction work. (5) Measurements can be taken even if the plate-shaped member has transverse or longitudinal gradients. (6) By casing the distance measuring means and other necessary measuring equipment, measurements can be taken without being affected by weather conditions. (7) Unmanned traveling and measurement can also be performed by using a satellite positioning system or the like, which enables measurement at night, for example, and achieves labor saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] [Figure 1] (a) is a plan view schematically showing a joint space, and (b) is a partial cross-sectional view schematically showing the joint space. [Figure 2] A block diagram showing a main configuration of a filler inspection system according to the present invention. [Figure 3] (a) is a cross-sectional view schematically showing a traveling body and each facility mounted thereon, and (b) is a cross-sectional view schematically showing the traveling body. [Figure 4] (a) is a cross-sectional view schematically showing a situation where a distance measuring means irradiates a laser, and (b) is a cross-sectional view schematically showing a surface height of one side line obtained by one scanning of laser irradiation. [Figure 5] A cross-sectional view schematically showing a situation where laser irradiation is performed by a left distance measuring means and a right distance measuring means. [Figure 6] (a) is a cross-sectional view schematically showing a situation where the left distance measuring means and the right distance measuring means irradiate a laser so as to cover the left side of one side line, and (b) is a cross-sectional view schematically showing a situation where the left distance measuring means and the right distance measuring means irradiate a laser so as to cover the right side of one side line. [Figure 7] A cross-sectional view schematically showing a situation where the left distance measuring means, a central distance measuring means, and the right distance measuring means irradiate a laser so as to cover the entire one side line. [Figure 8] A cross-sectional view schematically showing two distance measuring means attached to a horizontally slidable horizontal support bar so as to be capable of sliding substantially horizontally in the vertical direction. [Figure 9] (a) is a cross-sectional view schematically showing a shape of a filler with a bulge, (b) is a cross-sectional view schematically showing a shape of a filler with a dent, (c) is a cross-sectional view schematically showing a shape of a filler with a convex step, and (d) is a cross-sectional view schematically showing a shape of a filler with a concave step. [Figure 10]A cross-sectional view schematically showing the filler inspection system of the present invention, wherein the distance measuring means irradiates a laser laterally. MODE FOR CARRYING OUT THE INVENTION

[0018] An embodiment of the filler inspection system of the present invention will be described with reference to the drawings. The present invention can be used in various cases where a filler is filled into a connection space between plate-shaped members, but for convenience, description will be given here with an example in which a filler is filled into a "joint space" between adjacent precast concrete floor slabs.

[0019] Figure 1 is a diagram schematically showing the joint space FS of precast concrete floor slabs PC, wherein (a) is a plan view seen from above, and (b) is a partial cross-sectional view cut along a vertical plane. As shown in Figure 1(a), since the precast concrete floor slab PC has a constant length in the direction perpendicular to the bridge axis, the joint space FS is also formed in a substantially linear shape with a constant length. For convenience, herein, the longitudinal direction of the joint space FS (that is, the joint axial direction of the precast concrete floor slab PC, which is the up-down direction in the figure) is referred to as the "joint axial direction", and the horizontal direction orthogonal to the connection axial direction is referred to as the "joint perpendicular direction".

[0020] As shown in Figure 1(b), the joint space FS is formed by abutting a left precast concrete floor slab PCL and a right precast concrete floor slab PCR. In addition, joint bars PB are provided at the end of each precast concrete floor slab PC, and a filler is filled in the joint space FS in a state where the joint bars PB are arranged therein. As the filler, ordinary concrete is generally used, but various materials such as non-shrink mortar, fiber-reinforced mortar, and polymer mortar can be used depending on the shape and size of the joint space FS.

[0021] Figure 2 is a block diagram showing the main components of the filler inspection system 100 of the present invention. As shown in this figure, the filler inspection system 100 of the present invention is configured to include a traveling body 101, a distance measuring means 102, and a finished product determination means 103, and may also be configured to include a marking means 104, a position measuring means 105, a control means 106, an output means 107, and an inspection information storage means 108.

[0022] Of the main components of the filler inspection system 100, the form determination means 103 and the control means 106 can be manufactured as dedicated components, or a general-purpose computer device can be used. This computer device includes a processor such as a CPU, memory such as ROM or RAM, input means such as a mouse or keyboard, and a display, and can consist of personal computers (PCs), servers, tablet PCs such as iPad®, and mobile terminals including smartphones. When using a computer device equipped with a display, it is preferable to use that display as the output means 107.

[0023] The inspection information storage means 108 can utilize the storage device of a general-purpose computer, or it can be built on a database server. When built on a database server, it can be located on a local network (LAN) or it can be a cloud server that stores data via the internet.

[0024] The following describes in detail each of the main elements constituting the filler inspection system 100 of the present invention.

[0025] (Vehicle) Figure 3 is a schematic diagram of the mobile body 101, where (a) is a cross-sectional view of the mobile body 101 and the equipment mounted thereon, viewed in the direction of the coupling axis, and (b) is a cross-sectional view of the mobile body 101 viewed perpendicular to the coupling axis. As shown in this figure, the mobile body 101 can be constructed including side plates 101A, wheels 101B, horizontal support bars 101C, vertical support bars 101D, handle 101E, etc., and can move along the coupling axis (i.e., in the direction of the connection axis). For example, it can be made self-propelled by mounting a motor or engine, or it can be made a push type using the handle 101E, and in any case the mobile body 101 moves by the rotation of the wheels 101B. Of course, various conventionally used mobility technologies can also be used, such as using caterpillar tracks instead of wheels.

[0026] Furthermore, as shown in Figure 3(b), the mobile unit 101 can be equipped with a battery BT to supply electricity to each piece of equipment, and a computer CT such as a personal computer (PC) or tablet PC. As previously described, this computer CT may be configured with a construction quality determination means 103 and a control means 106.

[0027] (distance measuring means) The distance measuring means 102 is, Figure 2As shown in Figure 3(a), the distance measuring means 102 is installed on the traveling body 101 and irradiates a laser in the direction of the filler material (downward in the figure). Therefore, as shown in Figure 3(a), when the traveling body 101 travels so as to straddle the filler material MT packed in the joint space FS (i.e., so that the distance measuring means 102 is positioned directly above the filler material MT), the distance measuring means 102 can irradiate the filler material MT and the precast concrete slab PC with a laser while moving in the connection axis direction. The distance measuring means 102 also determines the distance from the distance measuring means 102 (in particular, the point of laser irradiation) to the point of laser reflection (i.e., the surface of the filler material MT or precast concrete slab PC) based on the irradiated laser (hereinafter, for convenience, this will be referred to as the "surface distance"). For example, the distance measuring means 102 can receive the laser reflected from the surface of the filler material MT or precast concrete slab PC, and the surface distance can be determined from the laser irradiation time and the reflected laser reception time. Furthermore, by incorporating a function to determine the direction of laser irradiation, it is possible to measure the three-dimensional coordinates of the laser reflection point relative to the laser irradiation point. Alternatively, conventional laser rangefinders such as the "camera-integrated laser displacement sensor (manufactured by Keyence Corporation)" can also be used.

[0028] Figure 4(a) is a schematic cross-sectional view showing the situation in which the distance measuring means 102 irradiates with a laser. As shown in this figure, the distance measuring means 102 irradiates with a laser in a line while scanning in a direction that is substantially perpendicular (including perpendicular) to the direction of travel of the traveling body 101 (i.e., in the direction perpendicular to the joint axis). The distance measuring means 102 also irradiates with the laser from a part of one adjacent precast concrete slab PC to a part of the other precast concrete slab PC. More specifically, the laser is irradiated so that the left precast concrete slab PCL is the starting point and the right precast concrete slab PCR is the ending point (of course, the reverse is also possible). This makes it possible to irradiate the entire surface of the filler material MT with the laser. For convenience, the laser range irradiated by the distance measuring means 102 in one scan will be referred to as "one side line".

[0029] As described above, the distance measuring means 102 can determine the surface distance based on the irradiated laser. Therefore, as shown in Figure 4(b), by irradiating with a laser line of one side, the surface distances of a portion of the left precast concrete slab PCL surface (a portion of the right side in the figure), the entire surface of the filler material MT, and a portion of the right precast concrete slab PCR surface (a portion of the left side in the figure) can be obtained, that is, the "surface height of one side", which is the relative height of each surface (hereinafter referred to as "surface height"), can be determined.

[0030] While the vehicle 101 is in motion, the distance measuring means 102 periodically irradiates a laser and calculates the surface height for each side. In other words, the surface height of one side is determined at regular intervals in the direction of the joint axis. The surface height of one side obtained by the distance measuring means 102 can be displayed on an output means 107, such as a display, by the control means 106. Alternatively, the control means 106 can be configured to store the surface height of one side in the inspection information storage means 108. In this case, it is preferable to store the surface height of one side and its measurement position together in the inspection information storage means 108.

[0031] To obtain the position of a single siding, it is advisable to install a position measuring means 105 on the vehicle 101. This position measuring means 105 measures the vehicle 101 (especially the position illuminated by the distance measuring means 102) while it is in motion. Various conventional positioning technologies can be employed, such as odometers like linear encoders or rotary encoders, satellite receivers for Global Navigation Satellite Systems (GNSS), or tracking total stations. When using an odometer, the distance traveled by the vehicle 101 in the joint space FS of each lane can be measured. When using a satellite positioning system or a tracking total station, the coordinates of the vehicle 101 can be measured directly.

[0032] By the way, if the width of the filler material MT (dimension perpendicular to the joint axis) is wide, the single laser line irradiated by the distance measuring means 102 may not reach from the left precast concrete slab PCL to the right precast concrete slab PCR. In this case, the traveling body 101 should travel the entire length of the filler material MT in the direction of the joint axis, then shift its position perpendicular to the joint axis, and then travel the entire length of the filler material MT again in the direction of the joint axis. This way, a single laser line covering the entire distance from the left precast concrete slab PCL to the right precast concrete slab PCR can be obtained with two laser irradiations.

[0033] Alternatively, two or more distance measuring means 102 can be arranged at a distance perpendicular to the joint axis. For example, as shown in Figure 5, the left distance measuring means 102L and the right distance measuring means 102R can be installed on the traveling body 101 at a distance perpendicular to the joint axis. This allows the traveling body 101 to cover the entire length of the filling material MT, from the left precast concrete slab PCL to the right precast concrete slab PCR, even if the width of the filling material MT is somewhat wide, by simply traveling the entire length of the filling material MT once. Of course, if the two distance measuring means 102 do not cover the two precast concrete slabs PC, as shown in Figure 6, the traveling body 101 should travel in a manner that covers as much of one distance as possible, and this should be repeated two or more times to obtain a distance that covers the two precast concrete slabs PC. For example, in Figure 6, first, as shown in (a), the left-side measuring means 102L and the right-side measuring means 102R are irradiated with a laser so as to cover the left side of one side line, and then, as shown in (b), the left-side measuring means 102L and the right-side measuring means 102R are irradiated with a laser so as to cover the right side of one side line, thereby measuring to cover the entire side line. Alternatively, as shown in Figure 7, the left-side measuring means 102L, the central measuring means 102C, and the right-side measuring means 102R can be arranged so that these three (or more) measuring means 102 irradiate with a laser so as to cover the entire side line.

[0034] As shown in Figure 3(a), the distance measuring means 102 can be attached to a horizontal support bar 101C supported by a vertical support bar 101D. Alternatively, as shown in Figure 8, the vertical support bar 101D can support the horizontal support bar 101C so that the horizontal support bar 101C can slide up and down. In this case, the height of the distance measuring means 102, i.e., the laser irradiation height, can be adjusted by adjusting the height of the horizontal support bar 101C, which is preferable.

[0035] Furthermore, when two or more distance measuring means 102 are arranged, they can be attached to the horizontal support bar 101C so that they can slide approximately horizontally (including horizontally). Since the horizontal support bar 101C is positioned perpendicular to the joint axis while the traveling body 101 is moving, it is preferable that the laser irradiation position can be adjusted left or right by adjusting the horizontal position of the distance measuring means 102. Note that when only one distance measuring means 102 is arranged, the laser irradiation position can be adjusted left or right by adjusting the traveling position of the traveling body 101 (position perpendicular to the joint axis), so there is not much advantage in making the distance measuring means 102 slide approximately horizontally. However, even with only one distance measuring means 102, it is of course possible to attach it to the horizontal support bar 101C so that it can slide approximately horizontally (including horizontally).

[0036] (Means for determining finished form) The construction condition determination means 103 is a means for determining the quality of the construction of the filler material MT based on the surface height of one side obtained by the distance measuring means 102. As previously described, the surface of the precast concrete slab PC is made flat with high precision, but in contrast, the filler material MT that is packed into the joint space FS will inevitably be somewhat uneven. Also, two adjacent precast concrete slab PCs are generally installed so that their surface heights are approximately the same. In other words, as shown in Figure 9, the unevenness of the filler material MT can be evaluated by using the surfaces of the left and right precast concrete slab PCs as reference planes. Figure 9 is a schematic cross-sectional view showing the construction of the filler material MT, where (a) shows filler material MT with a bulge, (b) shows filler material MT with a depression, (c) shows filler material MT with a convex step, and (d) shows filler material MT with a concave step.

[0037] The procedure by which the construction quality determination means 103 determines the quality of the construction of the filler material MT will be explained in detail. First, based on the surface height of one side line, the largest height difference (hereinafter referred to as "maximum difference δ") between the surface height of the filler material MT and the surface height of the precast concrete slab PC (hereinafter referred to as "reference height") is extracted. The surface height of one side line includes the surface heights of the left precast concrete slab PCL and the right precast concrete slab PCR, and also includes the surface height of the filler material MT, so this maximum difference δ can be extracted. Then, the maximum difference δ is compared with a predetermined allowable range, and if the maximum difference δ is within the allowable range, the construction of the filler material MT at that location is determined to be "normal", and if the maximum difference δ exceeds the allowable range, the construction of the filler material MT is determined to be "poor". This tolerance range is defined as a positive value when the surface height of the filler MT is higher than the reference height, and a negative value when it is lower. For example, it could be -3 mm or more and 3 mm or less, or -2 mm or more and 1 mm or less.

[0038] Furthermore, when the construction quality determination means 103 determines that the filler MT is defective, the control means 106 can be configured to store information related to the construction of the filler MT (hereinafter referred to as "inspection information") in the inspection information storage means 108. Of course, even when the construction quality determination means 103 determines that the filler is normal, the control means 106 can also store the inspection information in the inspection information storage means 108. This inspection information may include the quality of the construction (defective / normal), the position of one siding measured by the position measuring means 105 (such as the distance traveled by the running body 101 or its coordinates), and the measurement time.

[0039] Furthermore, when the construction quality determination means 103 determines that a product is defective, the marking means 104 can be used to mark it. This marking means 104 is mounted on the traveling body 101 and can mark products with spray paint or chalk while in motion. Specifically, when the construction quality determination means 103 determines that a product is defective, the control means 106 transmits an operation command to the marking means 104 at that time, and the marking means 104 then marks the surface of the filler material MT or the surface of the precast concrete slab PC.

[0040] (Other features) The filler inspection system 100 of the present invention may have a function to output inspection information stored in the finished product determination means 103 to a report, and a function to generate a three-dimensional model of the filler MT based on measurement data (surface height of one side line) from the distance measuring means 102. Furthermore, a shooting means capable of recording video while moving may be mounted on the mobile body 101, and a robotic arm that automatically corrects the filler MT determined to be defective by the finished product determination means 103 on the spot may also be mounted on the mobile body 101.

[0041] (Example of use) An example of using the filler inspection system 100 of the present invention will now be described. When the filler inspection system 100 is placed in a predetermined position, the inspector grips the handle 101E and pushes the traveling body 101 in the direction of the joint axis. As the traveling body 101 moves, the distance measuring means 102 periodically irradiates a laser to measure the "surface height of one side line," and the finished product determination means 103 determines whether the finished product of the filler MT is good or bad based on the surface height of that one side line. If the finished product determination means 103 determines that it is defective, the control means 106 stores the inspection information in the inspection information storage means 108 and simultaneously marks it with the marking means 104. This series of steps is repeated for the joint space FS of all lanes (for example, 4 lanes in Figure 1(a)) and the inspection is completed. After the inspection is completed, the filler MT is repaired based on the markings of the marking means 104.

[0042] (modified version) Up to this point, the explanation has been based on an example where the distance measuring means 102 irradiates a laser downwards. However, as shown in Figure 10, the filler inspection system 100 of the present invention can also be configured such that the distance measuring means 102 irradiates a laser to the side, or irradiates a laser upwards. Furthermore, the system is designed to allow the arrangement of the distance measuring means 102 to be changed, so that the distance measuring means 102 can be positioned to irradiate a laser downwards, to irradiate a laser to the side, or to irradiate a laser upwards, depending on the situation. [Industrial applicability]

[0043] The filling material inspection system of the present invention can be used not only for filling materials used to fill joint spaces in bridge deck slabs, but also for various filling materials used to fill connection spaces between plate-shaped members. Considering that the present invention provides good structures and, in a sense, high-quality social capital (infrastructure), while also reducing the burden on inspectors and contributing to labor saving, it can be said that this invention is not only industrially applicable but also has the potential to make a significant contribution to society. [Explanation of Symbols]

[0044] 100 Filling material inspection system of the present invention 101 (Traveling unit of the filler inspection system) 101A (Side panel of the running gear) 101B (wheels of the vehicle) 101C (horizontal support bar of the running gear) 101D (Vertical support bar for the running gear) 101E (Handle of the vehicle) 102 Distancing means (of the filler inspection system) 102C Central distance means (of distance measuring means) 102L (Left distance measuring means of the distance measuring means) 102R Right distance measuring means (of the distance measuring means) 103 (Means for determining the quality of the filling material inspection system) 104 Marking means (of the filler inspection system) 105 Position measuring means (of the filler inspection system) 106 Control means (of the filler inspection system) 107 Output means (of the filler inspection system) 108 (Inspection information storage means for the filler inspection system) BT Battery CT computer FS joint space MT filler PB joint reinforcement PC Precast Concrete Slab PCL (Precast Concrete Slab) Left Side PCR Right side precast concrete slab

Claims

1. A system for inspecting the finished product of filler material packed into a strip-shaped connecting space between adjacent plate-shaped members, A hand-pushed or self-propelled vehicle is positioned to straddle the aforementioned filler material and travels on the plate-shaped member in the axial direction of the connecting space, A distance measuring means installed on the traveling body, which measures distance based on a laser irradiated from directly above in the direction of the filler, The system includes a means for determining the quality of the finished product of the filler, The distance measuring means moves together with the traveling body and irradiates a laser in a line in a direction perpendicular or substantially perpendicular to the traveling direction of the traveling body, from a part of one adjacent plate-shaped member to a part of the other plate-shaped member, thereby measuring the surface height of one side line including parts of the two plate-shaped members and the filler material. The aforementioned shape determination means calculates the height difference between the surface of the plate-shaped member and the surface of the filler material from the surface height of the one side line, and determines that the shape of the filler material is defective when the height difference exceeds a predetermined allowable range. A filler inspection system characterized by the following features.

2. The distance measuring means comprises a left distance measuring means and a right distance measuring means, which are arranged at a distance from each other in a direction perpendicular or substantially perpendicular to the direction of travel. The left distance measuring means irradiates a laser from a part of the plate-shaped member on the left side in the direction of travel to the filler material, The aforementioned right-hand distance measuring means irradiates a laser from a part of the plate-shaped member on the right side in the direction of travel to the filler material. The filler inspection system according to claim 1, characterized by the features described above.

3. The left distance measuring means and the right distance measuring means are installed on the traveling body so as to be slidable in a direction perpendicular or substantially perpendicular to the direction of travel. The filler inspection system according to claim 2, characterized in that it is a filler inspection system.

4. The distance measuring means is installed on the traveling body so as to be able to slide up and down. A filler inspection system according to any one of claims 1 to 3.

5. If the aforementioned form determination means determines that the product is defective, the system further includes a marking means for marking the surface of the filler or the plate-shaped member. The filler inspection system according to claim 1, characterized by the features described above.

6. A position measuring means for measuring the position of the aforementioned traveling body, The system further comprises a control means for storing defective information in a memory means, When the construction quality determination means determines that a product is defective, the control means stores information about the defect along with the position measured by the position measuring means. The filler inspection system according to claim 1, characterized by the features described above.

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