JP3524752B2 - Wall inspection equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wall surface inspection device. More specifically, the present invention relates to a technique for making a composite determination of an infrared image and a visible image to detect peeling of the surface of footwear such as tunnels and deformation of deposits.

[0002]

2. Description of the Related Art A schematic view of a conventional tunnel shoe wall surface deformation detecting device is shown in FIG. This device detects peeling and stains on the wall surface of the tunnel shoe, and detects the infrared rays emitted from the heating device 1 for heating the surface of the tunnel shoe wall and the heated tunnel shoe wall surface. An inspection apparatus having an infrared camera 2 for acquiring the image, an illumination 4 for illuminating the wall surface of the tunnel shoe, and a visible camera 3 for acquiring the visible image, and an image processing for independently analyzing the acquired infrared image and the visible image individually It is composed of the analysis device 8.

Therefore, as shown in FIG. 5, when the tunnel work surface 11 is heated by the heating device 1, the temperature of the tunnel work surface 11 rises, and the tunnel work surface 11 is tunneled inside the work. A heat flow toward the back surface 12 is generated. At this time, when the peeling 13 such as an air layer exists inside the shoe, the flow of heat is blocked by the peeling 13, and the decrease rate of the tunnel shoe surface temperature in the peeling 13 is in a normal portion other than the peeling. It becomes slower than the rate of decrease of the surface temperature of the tunnel shoe.

As a result, in the peeling 13, the state where the surface temperature is higher than that in the normal portion without peeling is maintained. Therefore, by utilizing this phenomenon, the peeling 13 on the wall surface of the tunnel shoe can be detected by the procedure shown in the flowchart of FIG.

First, the infrared temperature of the tunnel work wall surface that occurs after heating the tunnel work surface 11 is photographed by the infrared camera 2 to obtain a temperature distribution image on the tunnel work wall surface (step 2). Next, it is determined whether or not the temperature is higher than the ambient temperature (step 3), and a portion having a temperature higher than the ambient temperature is determined as a peeling portion (step 4).

Further, a place where the temperature is not higher than the ambient temperature is judged to be a normal place (step 8). Subsequently, an infrared image processing map is created by the peeled portion and the normal portion (step 5), the result is output as a map (step 6), and the process is ended (step 7).

On the other hand, as shown in FIG. 5, dirt attached to the wall surface in the tunnel is generally caused by dust, black smoke contained in the engine exhaust of vehicles running in the tunnel, and rails and wheels of the railway in the case of a subway. Since components such as iron powder generated by rubbing adhere to the wall surface, the stain surface has a dark color such as dark brown to black, and the surface is rough. By utilizing this property, it is possible to detect the stain on the wall surface of the tunnel shoe by the procedure shown in the flowchart of FIG.

First, the surface of the wall of the tunnel work is illuminated by the illumination 4, and the image is taken by the visible camera 3 (step 9). Next, in the image, it is determined whether the brightness level is lower than that of the surroundings and the deviation of the brightness level is large (step 10), and the region where the brightness level is lower than the surroundings and the deviation of the brightness level is large ( A region that is darker than the surroundings and has a rough surface) is determined as stain (step 11).

Further, the brightness level is not lower than the surroundings,
Alternatively, a region in which the deviation of the brightness level is not large is determined as a normal part (step 13). Subsequently, a visible line image processing map is created by the stain part and the normal part (step 12), and the result is output as a map ( Step 6) is ended (step 7).

[0010]

SUMMARY OF THE INVENTION The above-mentioned tunnel footwear wall surface deformation detecting device determines and detects the peeling 13 among the deformations by the image processing analysis of the infrared image and detects the stain by the image processing analysis of the visible image. Therefore, the peeling location determined and detected from the infrared image contains various deposits 14 deposited on the wall surface of the tunnel footwear, and it is theoretically difficult to distinguish between the peeling and the deposit 14.

The term "precipitate" as used herein means that water leaks from defects such as cracks generated in the shoe, and the sand and sand on the back of the shoe and the lime content inside the shoe start to melt and solidify on the surface of the shoe. Also, the dead bodies of bacteria, etc., that occur at the water leakage points adhere to the surface of the tunnel footwear. Generally, the surface of the deposit is liable to be adhered with the above-mentioned stain component, and has a brown to black color like the stain, and its surface is rough.

[0012] In detecting the peeling shown in Fig. 5, the deposit 14 is also heated when the surface 11 of the tunnel footwear is heated, and the temperature thereof rises. Since it only adheres to the surface 11, there is an air layer between the precipitate 14 and the surface 11 of the tunnel footwear, so that the heat does not escape to the back surface 12 of the tunnel footwear as in the case of separation inside the footwear, and the temperature drops. Hard to do.

As a result, when the deposit 14 is photographed by the infrared camera 2 as in the case of peeling, it is detected as a region having a temperature higher than the surroundings and cannot be distinguished from the case of peeling. Therefore, the peeled region detected by the conventional apparatus is detected. Contains the deposits that had not been peeled off and deposited on the wall surface of the tunnel footwear, which impaired the reliability of peeling detection, which is very important in determining the deterioration of the tunnel footwear. In addition, since the stain and the surface of the deposit have the same properties as the area of the stain determined by the image processing analysis of the visible image in the conventional apparatus, the deposit is included in the visible image processing analysis. The distinction was impossible.

[0014]

A wall surface inspection apparatus according to claim 1 of the present invention which solves the above problems is a heating means for heating a wall surface to be inspected, and a temperature for detecting a temperature distribution of the wall surface after heating. In a wall surface inspection device having a distribution detecting means and a brightness detecting means for detecting the brightness of the wall surface, a high temperature area judging section for judging a high temperature area of the temperature distribution detected by the temperature distribution detecting means, and a brightness detected by the brightness detecting means From the low brightness / high brightness deviation area determination unit that determines the low brightness / high brightness deviation area where the brightness level is low and the deviation of the brightness level is large, and the low brightness / high brightness deviation from the high temperature area determined by the high temperature area determination unit It is characterized by including a peeling determination unit that excludes the low-luminance / high-luminance deviation region determined by the region determination unit and determines the remaining region as peeling.

A wall surface inspection apparatus according to a second aspect of the present invention for solving the above-mentioned problems is that in the first aspect, it has a deposit area determination section that determines the area excluded by the separation determination section as a deposit area. Is characterized by.

A wall surface inspection apparatus according to a third aspect of the present invention which solves the above problems is a heating means for heating a wall surface to be inspected, a temperature distribution detecting means for detecting a temperature distribution of the heated wall surface, and a wall surface. In a wall surface inspection device having a brightness detecting means for detecting the brightness of, a high temperature area judging section for judging a high temperature area of the temperature distribution detected by the temperature distribution detecting means, and a brightness level low from the brightness detected by the brightness detecting means and A low-luminance / high-luminance deviation region determination unit that determines a low-luminance / high-luminance deviation region with a large luminance level deviation, and a high-temperature region from the low-luminance / high-luminance deviation region determined by the low-luminance / high-luminance deviation region determination unit A high-temperature area determined by the determination section is excluded, and the remaining area is determined as a stain determination section.

A wall surface inspection apparatus according to claim 4 of the present invention which solves the above-mentioned problems is that in claim 3, the wall surface inspection device has a deposit area determination section for determining an area excluded by the stain determination section as a deposit area. Is characterized by.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail with reference to the examples shown in the drawings. FIG. 1 shows a tunnel shoe wall surface deformation detecting device according to an embodiment of the present invention. As shown in FIG. 1, this tunnel shoe wall surface deformation detecting device includes a heating device 1, an inspection device having an illumination 4, an infrared camera 2 and a visible camera 3, a recording device 5, an image processing analysis device 8 and the like. It is composed by.

The infrared camera 2 emits infrared rays emitted from the surface of the tunnel shoe uniformly heated by the heating device 1.
It takes some time to detect and acquire an infrared image.

The visible camera 3 acquires a visible image of the wall surface of the tunnel construction illuminated by the illumination 4. The infrared image and the visible image acquired by the infrared camera 2 and the visible camera 3 are taken into the recording device 5 and recorded in the recording medium 6.

The image data recorded on the recording medium 6 is reproduced as an image by an external reproducing device 7 and taken into the image processing analysis device 8. The result of the determination detection by the image processing analysis device 8 is output to an external output such as the monitor 9 or the printer 10 in the form of a map or the like. Image processing analysis device 8
Performs image processing analysis by combining the captured infrared image and visible image, and separates and detects peeling, deposits, stains and the like according to the determination detection flow shown in FIG.

That is, the image processing analysis device 8 has a function of executing each processing of the determination and detection flow shown in FIG. 2, a high temperature area determination section, a low brightness / high brightness deviation area determination section, a separation determination section, and a deposit. It has a region determination unit and a stain determination unit. The high temperature region determination unit is a unit that determines the high temperature region of the temperature distribution detected by the infrared camera 2 that is the temperature distribution detection unit (see step 3 in FIG. 2).

The low brightness / high brightness deviation area judging section is a means for judging a low brightness / high brightness deviation area having a low brightness level and a large deviation of the brightness level from the brightness detected by the visible camera 3 which is the brightness detecting means. Yes (see step 5 or 11 in FIG. 2). The peeling determination unit excludes the low luminance / high luminance deviation region determined by the low luminance / high luminance deviation region determination unit from the high temperature region determined by the high temperature region determination unit and determines the remaining region as peeling. Yes (see steps 3, 5 and 6 in FIG. 2).

The deposit area determination unit has a function of determining the area excluded by the separation determination unit as a deposit area (see steps 3, 5 and 7 in FIG. 2). The stain determination unit
The low-luminance / high-luminance deviation region determination unit has a function of excluding the high-temperature region determined by the high-temperature region determination unit from the low-luminance / high-luminance deviation region determined, and determining the remaining region as a stain (see FIG. 2). See steps 3, 11 and 12).

The tunnel shoe wall surface deformation detecting apparatus of the present embodiment having the above-mentioned structure can judge by separating the deposit from the peeling and the stain according to the detection judging flow shown in FIG. 2 as described below. it can. First, infrared image data is loaded into the image processing analysis device 8 (step 2). Next, it is determined by infrared image processing analysis whether or not the area is hotter than the surrounding area (step 3).

When it is determined that the temperature is higher than the ambient temperature, the visible image data of the same location is taken into the image analysis processing device 8 (step 4), and subsequently, the level of the pixel brightness which is the characteristic of stain is low, and It is determined whether the deviation of the pixel brightness level is large (step 5). Judgment result,
If the pixel brightness level is low and the deviation of the pixel brightness level is large, it is determined to be a deposit (step 7), and if not, it is determined to be peeling (step 6).

Further, the determined result is created in a map format or the like (step 8), and the created map is output to the monitor 9 or the printer 10 (step 9). On the other hand, if the infrared image processing analysis in step 3 does not determine that the temperature is not higher than the ambient temperature, the visible image data of the same location is fetched (step 10), and the same determination as in step 5 described above is performed (step 10). 11) If it is determined that the brightness level is low and the deviation of the brightness level is large, it is determined as stain (step 12), and if not, it is determined as a normal part (step 13).

The result is created in a map format or the like (step 8) and externally output (step 9). As described above, the tunnel shoe wall surface deformation detecting apparatus of the present embodiment determines that the precipitates, which could not be determined up to now, are peeled off by performing the determination by combining the infrared image processing analysis and the visible image processing analysis. It can be determined separately from fouling.

That is, in the conventional apparatus, since the infrared image and the visible image are independently image-processed and analyzed, it is impossible to distinguish between the deposit and the peeling and the deposit and the stain. In the detection result of peeling, which is very important for deterioration determination, the deposits on the wall surface of the footwear were also included, and the reliability of detection of peeling was low, whereas in this example, two image processings were combined. Therefore, the deposit can be determined separately from the peeling and the stain. This makes it possible to detect peeling, which is very important in determining the deterioration of tunnel footwear.
Only the peeling can be detected without misjudging the deposit as the peeling, so that the detection reliability of the peeling can be improved,
It can greatly contribute to improving the reliability of the deterioration determination of tunnel shoes.

[0030]

As described above concretely on the basis of the embodiments, the wall surface inspection apparatus according to claim 1 of the present invention comprises a heating means for heating the wall surface to be inspected and a wall surface after heating. In a wall surface inspection device having a temperature distribution detecting means for detecting a temperature distribution and a brightness detecting means for detecting the brightness of a wall surface, a high temperature area determining section for determining a high temperature area of the temperature distribution detected by the temperature distribution detecting means, and a brightness From the low-brightness / high-brightness deviation region determination unit that determines the low-brightness / high-brightness deviation region having a low brightness level and a large deviation in the brightness level from the brightness detected by the detection means, and the high-temperature region judged by the high-temperature region judgment unit. Low brightness / high brightness
Since the high-luminance deviation region is excluded and the peeling determination unit that determines the remaining region as peeling is included, only the peeling can be separated from the determination result and the detection reliability can be improved.

According to a second aspect of the present invention, the wall surface inspection apparatus according to the first aspect has a deposit area determination section that determines the area excluded by the separation determination section as a deposit area. In addition to the same effect as 1, the detection reliability of deposits can be improved.

According to a third aspect of the present invention, in the wall surface inspection apparatus, heating means for heating the wall surface to be inspected, temperature distribution detecting means for detecting the temperature distribution of the wall surface after heating, and brightness of the wall surface are displayed. In a wall surface inspection device having a brightness detecting unit for detecting, a high temperature region determining unit for determining a high temperature region of the temperature distribution detected by the temperature distribution detecting unit and a low brightness level and a brightness level of the brightness level from the brightness detected by the brightness detecting unit. A low-luminance / high-luminance deviation region determination unit that determines a low-luminance / high-luminance deviation region with a large deviation, and a high-temperature region determination unit from the low-luminance / high-luminance deviation region determined by the low-luminance / high-luminance deviation region determination unit Since it has a stain determination unit that excludes the determined high temperature region and determines the remaining region as stain, only the stain can be separated from the determination result and the detection reliability thereof can be improved.

Further, the wall surface inspection apparatus according to claim 4 of the present invention has a deposit area determining section for determining the area excluded by the stain determining section as a deposit area according to claim 3, In addition to the same effect as 3, the detection reliability of deposits can be improved.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a tunnel shoe wall surface deformation detecting device according to an embodiment of the present invention.

FIG. 2 is a flow chart of determination detection of a tunnel shoe wall surface deformation detection device according to an embodiment of the present invention.

FIG. 3 is a schematic view of a conventional tunnel shoe wall surface deformation detection device.

FIG. 4 is a deformation determination detection flowchart of a conventional tunnel shoe wall surface deformation detection device.

FIG. 5 is an explanatory diagram of a principle of detecting peeling from an infrared image in a conventional device.

[Explanation of symbols]

1 heating device 2 infrared camera 3 visible camera 4 lighting 5 recording device 6 recording media 7 playback device 8 Image processing analyzer 9 monitors 10 Printer

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Satoshi Honda 1200, Higashi-Tanaka, Komaki City, Aichi Prefecture Mitsubishi Heavy Industries, Ltd., Nagoya Induction Propulsion System Works (56) Reference JP-A-5-307013 (JP, A) JP-A-10-10064 (JP, A) JP-A-6-138003 (JP, A) JP-A-7-234186 (JP, A) JP-A-11-259656 (JP, A) Actual development Sho-63-170745 (JP, U) Sekikai Sho 63-170747 (JP, U) Japanese Patent Publication 8-12163 (JP, B2) Patent 2556908 (JP, B2) Patent 2602818 (JP, B2) Taketoshi Ogino, Nobuhiro Miyata, Junichiro Osawa , Yuji Okawa, Yoshihiro Sera, "Development of tunnel inspection system using infrared rays (Part 1) -Principle of deformation detection-", Proceedings of the Annual Meeting of JSCE, Japan, Japan JSCE, August 1, 1997, 52nd session, Part 6, 6-260, p. 520-521 Junichiro Osawa, Nobuhiro Miyata, Toshikazu Ishizaka, Fumihiro Miyata, Satoshi Honda, "Development of tunnel inspection system using infrared rays (Part 2) -On running confirmation test by prototype machine-" , Proceedings of the Annual Meeting of JSCE, Japan, JSCE, August 1, 1997, 52nd, Part 6, 6-261, p. 522-523 Yoshihiko Saeki, Kenji Naito, “Inspection of Civil Engineering Buildings in the Subway”, Journal of Japan Railway Facilities Association, Japan, February 1, 1997, Vol. 35, No. 2, p. 106-108 (58) Fields investigated (Int.Cl. ⁷ , DB name) G01N 25/00-25/72 E21D 11/00-11/40 G01J 5/00-5/62 G06T 1/00 G06T 7 / 00 JISST file (JOIS)

Claims (4)

(57) [Claims] 1. A wall surface inspection apparatus comprising: heating means for heating a wall surface to be inspected; temperature distribution detecting means for detecting a temperature distribution on the wall surface after heating; and brightness detecting means for detecting the brightness of the wall surface. A high temperature region determination unit that determines a high temperature region of the temperature distribution detected by the temperature distribution detection unit, and a low brightness / high brightness deviation region where the brightness level is low and the brightness level deviation is large from the brightness detected by the brightness detection unit. Exclude the low brightness / high brightness deviation area determined by the low brightness / high brightness deviation area judgment section from the high brightness area judged by the low brightness / high brightness deviation area judgment section and the high temperature area judgment section A wall surface inspection apparatus comprising a separation determination unit that determines separation. 2. The wall surface inspection apparatus according to claim 1, further comprising a deposit area determination unit that determines the area excluded by the separation determination unit as a deposit area. 3. A wall surface inspection apparatus having heating means for heating a wall surface to be inspected, temperature distribution detecting means for detecting a temperature distribution of the wall surface after heating, and brightness detecting means for detecting the brightness of the wall surface. A high temperature region determination unit that determines a high temperature region of the temperature distribution detected by the temperature distribution detection unit, and a low brightness / high brightness deviation region where the brightness level is low and the brightness level deviation is large from the brightness detected by the brightness detection unit. The low-luminance / high-luminance deviation region determination unit and the low-luminance / high-luminance deviation region determination unit excludes the high-temperature region determined by the high-temperature region determination unit from the low-luminance / high-luminance deviation region determination region A wall surface inspection device comprising a stain determination unit that determines stain. 4. The wall surface inspection apparatus according to claim 3, further comprising a deposit area determination unit that determines the area excluded by the stain determination unit as a deposit area.