JP2004191258A - Method of detecting water leakage path in building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To relatively easily and economically detect a water leakage path, to compactify a device used therein to facilitate carriage therefor, and to surely grasp the leakage path in a structure of a building. <P>SOLUTION: In this leakage detecting method for the building of the present invention, temperature difference air E detectable by an infrared-sensitive camera with respect to a temperature of the structure of the building of an inspection object is forcibly introduced from a crack opening part in a reverse side of the structure. A condition of the temperature difference air E blown out from a surface portion having the possibility of the leakage in the structure, or a condition in a peripheral edge of a blow-out port is photographed by the infrared temperature-sensitive camera to form a temperature distribution condition into an image. The portion having the possibility of the leakage is assigned based on a local temperature difference part displayed in the image G. Then, discrimination gas K is forcibly introduced from the crack opening part in the reverse side of the structure, as in the manner hereinbefore, the gas K is detected by a gas detector while tracing the portion having the possibility of the leakage, and the opening part of the leakage path is specified in the structure. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for externally detecting a water leakage path generated in a structure such as a roof, a wall, and a floor in a building.
[0002]
[Prior art]
The present inventor has previously proposed a method of finding a water leakage path that passes through the inside of a structure such as a wall, a floor, or a pillar of a building, and diagnosing the water leakage point, and a device therefor (Patent Document 1). And repairing water leakage using the equipment.
How to diagnose this water leakage channel, "Mizumichi"? A gas inlet is provided at a crack in a structure such as a wall surface, carbon dioxide gas is injected into the gas inlet, and carbon dioxide leaking from a breach on the surface of the structure is caught by a gas detector and the gas detector is used. This is to confirm that the ruptures are connected by a water leakage channel inside the structure.
[0003]
Since the gas inlet and the leak catch point of carbon dioxide gas can be confirmed to be continuous inside the structure, if this gap is filled with a waterproof filler, it is necessary to perform a water leakage repair work to close the leak water path. Can be.
However, in this detection method, the location where the carbon dioxide gas detection sensor is located is caught in a spot, so for example, when the leak location is prolonged in a band along the joints or cracks of the surface finishing material, or the leak location is entirely When it is scattered across, etc., it is not possible to grasp the entire leak location, so the leak location may be missed. In this case, there is a problem that a water leak is caused and a diagnosis must be performed again.
[0004]
On the other hand, as a conventional known technique, a wall surface is irradiated with heat rays such as infrared rays to heat a target wall surface into a hollow spot shape, and a generated wall surface temperature difference is analyzed with an image obtained by an infrared camera, and the temperature difference is analyzed. A technique for detecting a floating state of a tile has been proposed (Patent Document 2).
With this method, the temperature of the raised tile in the normal part decreases because the thermal energy is transmitted to the skeleton behind it, but in the floating part of the tile, the heat transfer to the skeleton of the raised temperature is interrupted by the floating space. As a result, the temperature of the surface of the tile having the raised portion becomes higher than other normal portions. When this is taken with an infrared camera, the temperature of the hollow spot in the image of the tile surface obtained is disturbed. Therefore, it is possible to know the floating state of the surface material on a thin wall surface such as a tile.
However, according to this method, it is only possible to know the floating state of the surface material, and it is not possible to find the water leakage channel of the building structure.
[0005]
Separately, a high-temperature gas of 40 ° C. to 100 ° C. is sprayed on the wall surface to heat the target wall surface, infrared radiation energy generated from the wall surface is measured by an infrared radiometer, and the obtained measurement data is image-analyzed. Thus, a method of detecting a surface or internal defect of the structure has been proposed (Patent Document 3).
However, this method does not search for a water leakage channel of a building, and blowing high-temperature gas of 40 ° C. to 100 ° C. on a wall surface requires a high operating cost and is economically burdensome.
[0006]
[Patent Document 1]
Tokiko Sho 61-004471
[Patent Document 2]
JP-A-06-188793
[Patent Document 3]
JP-A-06-258153
[0007]
[Problems to be solved by the invention]
The present invention has been made in view of the above-mentioned circumstances, and it is possible to relatively easily and economically detect a water leak channel, to use a compact and easy-to-use device, and to reliably detect a water leak channel in a building. Is provided.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 provides a temperature difference air (E) that can obtain a temperature difference that can be detected by an infrared sensing camera with respect to the temperature of a structure of a building to be inspected. The state of the temperature difference air (E) ejected from the surface of the structure where there is a risk of water leakage from the crack opening on the back side and / or the jet port where the temperature difference air (E) is ejected and cooled. Is photographed with an infrared temperature sensing camera, and the temperature distribution state is imaged. In the captured image (G), a portion having a possibility of water leakage is designated from the local temperature difference portion displayed, and then the identification gas (K) is identified from the crack opening on the back side of the structure as described above. And detecting the identification gas (K) with a gas sensor while tracing the designated place where there is a possibility of the water leakage, and specifying the opening of the water leakage passage of the structure from the detection position. .
[0009]
The invention described in claim 2 is characterized in that the air is heated or cooled to create a temperature difference air.
[0010]
According to the third aspect of the invention, there is provided a method for press-fitting a temperature difference air (E), wherein a close contact air nozzle having an air reservoir (S) is pressed against the surface of the structure, and the temperature difference is introduced into the air reservoir (S). The air (E) is pumped.
[0011]
The invention described in claim 4 is characterized in that the method of obtaining the high temperature difference air (E) is performed by a heater provided with a temperature control unit.
[0012]
The invention according to claim 5 is characterized in that the method for obtaining the high temperature difference air (E) is performed by an air cooler provided with a temperature control unit.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
The method for detecting a water leak of a building according to the present invention, which is described below with reference to an embodiment shown in the drawings, first measures the temperature of the outer wall surface of the building to be inspected. The detection method may be, for example, by an infrared temperature detection camera described later, or by a temperature detector that directly touches a wall surface.
The temperature of the outside wall and the temperature of the air that can be effectively identified by the infrared temperature detection camera are set. The setting of the air temperature varies depending on the sensitivity of the infrared temperature detection camera to be used, but a normal infrared temperature detection camera requires a temperature difference of 1 ° C. or more.
[0014]
The air having the set temperature (temperature difference air) may be generated by the heater 9 having the temperature control unit 10 or by the air cooler 11 having the temperature control unit 12.
Which one to select depends on the relationship between the environment at that time and the heater or the cooler.
For example, when the outer wall surface is heated to a high temperature during a high temperature in summer, it is preferable to use a cooler to generate cold air lower than the outer wall surface and use this as the temperature difference air. On the other hand, when the outer wall surface is at a low temperature in cold winter, it is desirable to use a heater to generate warm air at a higher temperature than the outer wall surface and use this as a temperature difference air. This is because, in the infrared temperature detection camera, when the outer wall surface is hot, the color becomes red, and when the low temperature difference air blows out, the color becomes blue and the discriminating power increases. This is because the wall surface becomes blue when the wall surface is low temperature, and becomes red when the high temperature difference air blows out therefrom, and the discriminating power increases.
[0015]
The heated or cooled temperature difference air E is pressed into the internal crack 5 of the structure 1 from the crack opening 3 on the back surface of the structure 1 (see FIGS. 1 and 2).
[0016]
There are various methods for press-fitting the high temperature differential air E. For example, as shown in FIG. 1, a close contact air nozzle 8 having an air reservoir S opened to a small area with respect to the back surface of the structure 1. , And the temperature difference air E is continuously pumped into the air reservoir S.
[0017]
Then, the temperature of the temperature difference air E is ejected from the surface of the structure 1 or the temperature is transmitted to the peripheral portion. Then, the surface a is photographed by the infrared temperature sensing camera 7, and the temperature distribution state is measured. Create an image.
[0018]
At first, the injected temperature difference air is absorbed by the material of the air gap where the thermal energy is blown out, so that the temperature difference between the blown air and the outer wall hardly appears. However, after a certain period of time, the endothermic effect of the void material is alleviated, and the temperature of the press-fit air flowing through the space is maintained. Then, when the temperature difference reaches an identification temperature difference effective for the infrared temperature sensing camera, a clear image is displayed there through the temperature difference (see FIG. 3).
At this time, the object displayed in the image is in the state of the temperature difference air (E) ejected from the surface portion of the structure where there is a risk of water leakage, and the object is cooled by ejecting the temperature difference air (E). There may be a state of the peripheral portion of the ejection port, but either one or both of them may be used.
[0019]
This image processing apparatus is composed of an infrared temperature sensing CCD camera 7, a computer 15, a monitor 16, and input devices such as a keyboard and a mouse. Images captured by the infrared temperature sensing CCD camera 7 are stored in the memory of the computer 15 and stored in the monitor 16 The image is output. Then, it is printed out from the color printer 17 and stored. Through the analysis of the image G, a location where there is a possibility of water leakage can be designated from the local temperature difference portion displayed in the image (G).
[0020]
At this time, since the image G is imaged with respect to the entire outer wall surface, even if the spouting point that causes water leakage is strip-shaped or a plurality of points are scattered, the entire image G is imaged. It is possible to grasp without leakage.
[0021]
By the above method, the entire image of the area where there is a risk of water leakage is specified for the outer wall surface, but in this, the temperature difference air is diffused along the joint from one of the outlets as a band-like image. It may be caught (see FIGS. 4A and B). In such a case, if all of the designated places displayed in the above image are regarded as the causes of the water leakage, the places where the water leakage is performed are enlarged and the scale of the construction is unnecessarily increased.
[0022]
Therefore, as a method for more surely confirming the water leak port, a true leak cause portion is identified by the identification gas.
Specifically, as in the case of the temperature difference air, the discrimination gas K is injected into the liquefied gas cylinder 14 brought in by the carbon dioxide gas or the like from the crack opening on the back side of the structure (see FIG. 5). Then, the discrimination gas will be ejected from the surface location by following a substantially similar path as in the case of the temperature difference air, but the location is specified by video / image processing of the location, and while capturing the entire image, While tracing the designated location, the location where the identification gas is ejected can be inspected without fail.
[0023]
Then, when the detection by the identification gas is continued, for example, in the case of the carbon dioxide gas detection, the gas can be detected at a concentration of ppm unit, so that a higher concentration portion can be detected from the ejection portion, and therefore, In addition, it is possible to specify a portion having the highest concentration among the outlets as a portion having the highest probability as a true leaking portion.
In this way, from the entire image of the spouting point captured by the temperature difference air, the true leaking point can be identified by the detection with the identification gas, and the leaking point can be detected most efficiently and with a probability of no leakage. Become.
[0024]
【The invention's effect】
The present invention is as described above, when the temperature difference air is injected from the back side of the crack existing in the structure of the building, the temperature air is blown from the front side of the crack, or the cracked portion is blown by the blowing air difference air. The temperature rises or falls from the periphery where no crack exists, and a temperature difference appears on the surface side of the structure.
[0025]
When the temperature difference is photographed with an infrared camera, the area of the high temperature part or the low temperature part is displayed in the image G, and even if a band or a plurality of parts are scattered, the spouting part causing the water leakage is detected. It is possible to grasp the whole without leaking, and then, by performing the detection with the identification gas, it is possible to detect a portion with a higher concentration among the spouting portions, and as a result, the highest probability as a true leaking portion However, it is possible to specify the location, and to detect the leaking point with the highest efficiency and with no probability of leakage.
[0026]
At this time, since the temperature difference air does not need to bring in a gas separately put into a cylinder, the cost is low, and the identification gas to be used thereafter is used by specifying a location having the highest probability as a leaking point. Therefore, the use amount is small and it is economical.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view of a cross section of a wall showing a method of injecting a temperature difference air obtained by a heater from a crack back door of a structure.
FIG. 2 is a schematic perspective view of a cross section of a wall showing a method of injecting a temperature difference air obtained by an air cooler from a back opening of a structure.
FIG. 3 is a schematic diagram of a state in which a temperature distribution state captured by an infrared temperature sensing camera is imaged.
FIG. 4 (b) is a schematic cross-sectional view showing a state in which the temperature difference air is diffused along one joint from one outlet of the structure, and FIG. 4 (a) shows a state where the air is projected as a band image on a monitor. Pattern diagram.
FIG. 5 is a schematic perspective view of a cross section of a wall showing a method of injecting a discriminating gas from a crack back door of a structure.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Structure 2 Color printer 3 Crack opening part 5 Internal crack 6 Floating gap 7 Infrared temperature sensing camera 8 Contact air nozzle 9 Heater 10 Temperature controller 11 Air cooler 12 Temperature controller 13 Gas detector 14 Gas cylinder 15 Computer 16 Monitor a Front surface b Back surface E Temperature difference air G Image X High or low temperature display part S Air reservoir K Identification gas

Claims (5)

A temperature difference air (E) that can obtain a temperature difference that can be detected by an infrared sensing camera with respect to the temperature of the structure of the building to be inspected is press-fitted from a crack opening on the back side of the structure,
Infrared temperature sensing of the state of the temperature difference air (E) spouting from the surface of the structure where there is a risk of water leakage and / or the state of the periphery of the spout where the temperature difference air (E) blows out and is cooled. Take a picture with a camera, image the temperature distribution state,
Designating a location where there is a possibility of water leakage from the displayed local temperature difference portion in the captured image (G),
Next, the identification gas (K) is pressed into the crack opening on the back side of the structure in the same manner as described above, and the identification gas (K) is detected by the gas sensor while tracing the designated place where there is a possibility of the water leakage,
A method for detecting a water leak in a building, comprising specifying an opening of the water leak from the structure from the detection position. The method for detecting water leakage in a building according to claim 1, wherein the temperature difference air is created by heating or cooling the atmosphere. The method of press-fitting the temperature difference air (E) is such that a close contact air nozzle having an air reservoir (S) is pressed against the surface of the structure, and the temperature difference air (E) is pumped into the air reservoir (S). The method for detecting a water leak in a building according to claim 1. The method for detecting a water leakage path in a building according to claim 1 or 2, wherein the method for obtaining the high-temperature difference air (E) is performed by a heater having a temperature control unit. The method for detecting a water leak in a building according to claim 1 or 2, wherein the method of obtaining the high temperature difference air (E) is performed by an air cooler provided with a temperature control unit.

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