JP2003065880A - Inspection method and inspection system of water leak spot of building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inspection method and an inspection system of a water leak spot capable of specifying a water infiltration spot outside the building quickly in a comparatively short time and surely. SOLUTION: An ultrasonic wave is made incident together with compressed air from the water leak spot 11a inside the building, and the ultrasonic wave in the compressed air propagated to the outside of the building through a crack 12 and a gap in the building structure which are a water leak route is measured, to thereby probe the water leak spot 11b outside the building.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and system for inspecting a water leak point in a building such as a concrete structure, and more particularly to a method and system for exploring a water intrusion point outside the building.

[0002]

2. Description of the Related Art In a building having a concrete structure, cracks may occur in the structure due to drying shrinkage of concrete or uneven settlement of the ground. If this crack is on the outside of the building, especially where rainwater directly falls, rainwater will penetrate into the concrete structure from the crack on the outside of the building and leak from the ceiling, wall or window around the inside of the building. Sometimes. Therefore, in order to repair the water leakage of the building, it is necessary to search the outside water infiltration site, and some exploration methods have been proposed.

As a method for exploring this water infiltration site,
Conventionally, there is a method of using water mixed with a fluorescent paint. It mixes fluorescent paint with water, sprays this water so that it falls on the outside of the building like rainwater, and casts a black light on the ceiling, wall or window around the inside of the building,
It seeks to determine the water leakage path by exploring the places where the fluorescent paint reflects.

Another conventional method is to use a gas with odor. This is to determine the leak route by preliminarily smelling the air, injecting this smelly gas into the structure from the leak point inside the building, and detecting the gas emitted outside the building with the odor sensor. It is a thing.

[0005]

In the conventional method using the above-mentioned fluorescent paint-mixed water, since the fluorescent paint-mixed water falls on the outside of the building like rainwater, it is detected that the fluorescent paint-mixed water is detected inside the building. However, there is a drawback in that it is difficult to identify the location of water leakage outside the building.

Further, in the conventional method using gas, the sensitivity of the odor sensor is low, so that the work of detecting the odor of the gas outside the building is troublesome and the measurement time becomes long, and the odor after the measurement is also disadvantageous. Since the sensor needs a process for returning to the initial state, the measurement time tends to be long.

The present invention has been made in order to solve the above-mentioned problems, and the problem is to be able to identify the water infiltration site outside the building quickly and reliably in a relatively short time. It is to provide a method for inspecting a leaking point.

[0008]

According to the present invention, compression is performed by injecting ultrasonic waves together with compressed air from a water leakage point inside a building, and propagating to the outside of the building through cracks and gaps in a building structure which is a water leakage path. Provided is a method for inspecting a water leak site, which is characterized by detecting a water intrusion site outside a building by measuring ultrasonic waves in the air.

In the method for inspecting a leak point according to the present invention, the water staying in the crack of the building structure, which is the leak path, is blown away by the compressed air, and the ultrasonic waves reliably pass through the leak path and the water outside the building. Since it propagates to the infiltration site, it is possible to reliably identify the water intrusion site outside the building. In addition, ultrasonic waves are transmitted not only through cracks and gaps but also through the interior of the structure of the building and are detected outside the building, but compressed air almost passes through only cracks and gaps. When ultrasonic waves are entrained in the air, the ultrasonic wave output becomes large at the water infiltration site outside the building, and therefore it is possible to reliably identify the water leakage site.

Further, according to the present invention, a compressor for sending compressed air under pressure, an air supply pipe for passing compressed air from the compressor, an ultrasonic wave generator for generating ultrasonic waves, and the ultrasonic wave generator are provided. There is provided an inspection system for a water leak point, which is provided with an acoustic wave conduction pipe connected to an air supply pipe and transmitting ultrasonic waves to compressed air, and an ultrasonic wave detection device for detecting ultrasonic waves.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a diagram schematically showing a method for inspecting a water leak location according to the present invention. In FIG. 1, an apparatus used for inspecting a water leak location includes a compressor 17 for sending compressed air under pressure, an air supply pipe 16 for passing compressed air from the compressor 17, and an ultrasonic generator 14 for generating ultrasonic waves.
This ultrasonic wave generator 14 is connected to an air supply pipe 16 to transmit ultrasonic waves to compressed air, and an ultrasonic wave detection device 13 for detecting ultrasonic waves.

Here, although not shown, the ultrasonic wave detecting device 13 receives a sensor part for detecting the ultrasonic wave transmitted from the ultrasonic wave generator 14 and the ultrasonic wave detected by this sensor part and outputs the strong ultrasonic wave. A device including a device main body for displaying the sound level in dB and converting it into an audible sound is used. The ultrasonic detecting device 13 may be provided with earphones or headphones for listening to the converted audible sound. The ultrasonic generator 14 is not particularly limited, but an ultrasonic generator that can generate ultrasonic waves with a center frequency of about 40 kHz is used, and the air supply pipe 16 is provided with packing (not shown) at its tip. It is possible to use the one that is formed so as to come into close contact with the building surface. Here, the center frequency is 40k
If an ultrasonic wave of about Hz is used, since the frequency is not included in normal noise, it can be easily detected without being affected by noise.

Next, a method of inspecting a leaked portion will be described. In FIG. 1, a wall body 11 of a building having a concrete structure
A crack 12 is formed in the building, and rainwater enters the room of the building through the crack 12. In such a case, the compressor 17 and the ultrasonic generator 14 are installed on the indoor side of the building, and the ultrasonic transmission pipe 15 and the air supply pipe 16 are connected as shown. Then, the tip of the air supply pipe 16 is brought into close contact with the indoor-side water leakage location 11a, and the compressor 17 is operated while the ultrasonic wave is generated by the ultrasonic wave generator 14. As a result, the compressed air is accompanied by ultrasonic waves and reaches the outdoor side water intrusion point 11b through the crack 12 from the indoor side water leakage point 11a. On the outdoor side, the intensity of the converted audible sound and the dB display are observed while moving the sensor unit of the ultrasonic detection device 13 along the surface of the wall body. If a location where the ultrasonic waves are maximum is found, this location becomes the water infiltration location 11b on the outdoor side. In addition, the sensor part of the ultrasonic detection device 13 does not contact the surface of the wall body, and always maintains a clearance of a predetermined length. This prevents the sensor section from detecting ultrasonic waves that have propagated through the wall portion other than cracks and gaps.

Further, in the above-mentioned embodiment, the outdoor system water intrusion portion 11b is searched by the inspection system of the present invention, but the present system can be used for other purposes.
For example, when there is a crack on the outdoor surface of the wall body, the tip of the air supply pipe 16 is brought into close contact with the outdoor crack to input compressed air and ultrasonic waves, and the sensor portion of the ultrasonic detection device 13 is used as a wall on the indoor side. Move along the surface of the body and observe the converted audible sound intensity and dB display. If a location where the ultrasonic waves increase is found on the indoor side, it can be seen that water is transmitted from the crack on the outdoor surface to the indoor side, where water leakage occurs.

[0016]

According to the method for inspecting a leaked point of the present invention, the leaked point can be detected quickly in a relatively short time.
For example, in the conventional method using gas, since the odor sensor must be calibrated and returned to the initial state for each measurement, there is a disadvantage that the labor is complicated and a long time is required for the measurement. In the method of inspecting water leaks, ultrasonic waves that propagate outside the building are measured, and the location where the measured waves are maximum is searched for to identify the water intrusion area outside the building. No calibration of the device is required, and it is possible to detect the water intrusion portion quickly in a relatively short time.

Further, according to the method for inspecting a water leak location of the present invention, it is possible to reliably identify the water intrusion location outside the building. That is, even if the gas propagates to the outside of the building through cracks and gaps in the building structure, the gas may stay around the water intrusion part outside the building. Although it is possible that an error may occur in specific work, when ultrasonic waves propagate through cracks and gaps in the building structure to the outside of the building, they quickly decay and disappear without accumulating, so the ultrasonic intensity Is reliably maximized at water ingress points outside the building, thus making it possible to reliably identify water ingress points outside the building.

[Brief description of drawings]

FIG. 1 is a cross-sectional view schematically showing a method for inspecting a leaked portion of the present invention.

[Explanation of symbols]

11 Walls of structures 11a Water leak point 11b Water entry point 12 cracks 13 Ultrasonic sensor 14 Ultrasonic generator 15 Compressor

Claims (2)

[Claims] 1. By injecting ultrasonic waves together with compressed air from a leaking point inside a building, and measuring ultrasonic waves in the compressed air propagating to the outside of the building through cracks and gaps in the building structure, which are leakage paths. , A method for inspecting a leaking point, which comprises exploring a water intrusion point outside the building. 2. A compressor for sending compressed air under pressure, an air supply pipe for passing compressed air from the compressor, an ultrasonic wave generator for generating ultrasonic waves, and the ultrasonic wave generator connected to the air supply pipe. System for inspecting water leakage, which comprises an ultrasonic conducting tube for transmitting ultrasonic waves to compressed air and an ultrasonic detecting device for detecting ultrasonic waves.