JPH0327066B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a method of striking a tile surface attached to a wall of a building, receiving the striking sound generated at the time, and using the received signal. The present invention relates to a method for detecting peeling of wall tiles, which determines the state of peeling of tiles.

[Prior Art] It is dangerous when tiles, etc. attached to the wall of a building with mortar peel off and fall. Therefore, the present applicant developed a conventional peeling detection device that detects the state of adhesion of tiles, etc. by the sound of impact. By special public service Showa 56-20498
Publication No. 57-23221, Publication No. 53-
This is proposed in Publication No. 1992, etc.

Although these known techniques are effective in themselves, (a) small peels as small as 5 cm in diameter or 7 cm deep;
It is difficult to detect peeling that is deep within a cm of the surface; (b) It takes time to move the detection device, and it is difficult to perform this on walls with many uneven surfaces; (c)
The drawback was that it required time and labor to process data and create drawings.

Therefore, in Japanese Patent Application No. 59-67470, the present applicant proposed a peeling detection device that can detect the size and depth of peeling, is easy to move, and can easily visualize data.

In order to better understand the present invention, the apparatus proposed in the aforementioned Japanese Patent Application No. 59-67470 will first be explained with reference to FIGS. 1 and 1a.

Figure 1 shows the tile T attached to the wall W of building B.
The area in which the degree of peeling is to be detected is shown, and the hanging moving part, which is indicated by reference numeral 1, is fixed by engaging with both sides of the parapet P formed on the roof of building B. A plurality of fixing fittings 2,
A guide rail 3 fixed on the plurality of fixing fittings 2 and extending above the parapet P, and wheels 4 and engaging portions 5 running on the guide rail 3.
and a hanging unit 6 formed in a U-shape as a whole. A pair of rods 7, 7 extending downward are fixed to the wall W side of the hanging unit 6, and guide wheels 8, which engage with the side surfaces of the parapet P, respectively, are attached to the rods 7, 7.
8 is rotatably provided, and at its lower end, a pair of arms 9, 9 extending from the lower side of the parapet P toward the wall surface W are provided rotatably in a horizontal plane. Pulleys 10, 10 are provided at the ends of the arms 9, 9 on the wall surface W side, respectively.
A guide wire 1 is attached to these pulleys 10, 10.
1 and 11 are wound respectively.

These guide wires 11, 11 are attached with a striking part, the entirety of which is indicated by the reference numeral 12.
A drive unit 13 is provided at the lower ends of the wires 11, 11. Therefore, by operating a motor (not shown) provided in the drive unit 13, the guide wire 11 moves, and the movement of the guide wire 11 causes an impact. The portion 12 is adapted to move up and down. Since the striking portion 12 moves up and down along the wall surface W as described above, it has an appropriate number of guide rollers 14.

As shown in FIG. 1a, the striking section 12 is provided with a striking unit U. This striking unit U
1, a guide rod 15 extending laterally from approximately the center of the striking part 12, a moving part 16 that moves in the left-right direction in the drawing along the guide rod 15 by a motor (not shown), and a striking part provided on the moving part 16. It is provided with a hammer 17, a load detector 18 provided at the tip of the striking hammer 17, and a microphone 19 for detecting the striking sound when the tile T is struck with the striking hammer 17.

Therefore, the vertical movement of the striking part 12 and the movement of the moving part 1
Due to the left and right movement of 6, the striking hammer 17 hits the wall surface W.
can be inspected in a planar manner. The above drive unit 1
3 and the movement command of the moving part 16 and the load detector 18
and the signal from the microphone 19 is transmitted to the control unit 2.
0 is sent and received. In other words, the control unit 20 is the control panel 2
1, and various operations are performed on an operation panel 22.
The control unit 20 includes a monitor 23, a floppy disk 24, and a printer 2 for data processing.
5 and a host computer 26.

The hanging unit 6, which is movably installed on the parapet P of the building B, is horizontally movable as described above, but to make the explanation easier to understand, the inspection range of the wall W is shown as a pair of wires 11, 11, and therefore the suspension unit 6 is assumed to be fixed.

The striking part 12 is moved to a predetermined position by a movement command signal from the control part 20, and the movable body 16 is moved to a predetermined position. Then, the striking position detector 30 detects the striking positions X and Y of the striking hammer 17 and sends the coordinate signals to the host computer 26. On the other hand, due to the impact operation of the impact hammer 17, the load detector 18 sends the load, that is, the impact force, and the microphone 19 sends the impact sound to the peeling determining section 31. This peeling determination section determines the size and depth of the peeled portion, and the determination signal is sent to the host computer 26. In this way, the determination results for each position (each coordinate) between the wires 11, 11 are stored in the host computer 26, and the results are stored in the floppy disk 24, displayed on the monitor 23, and printed by the printer 25. be done.

On the other hand, with the recent development of electronic equipment, voice discrimination devices are being used in various directions. An example of this is shown in FIG. 2. In the preprocessing circuit 31, the sound from the microphone 30 is amplified and filtered to increase the level of a specific frequency.
An AD conversion circuit 32 performs AD conversion, a processing circuit 33 collects frequencies from the frequency characteristics of the audio, generates parameters, compresses the parameters as necessary, and registers them as a pattern in a storage circuit 34. In this way, the memory circuit 3
4, various sounds are registered as patterns. Next, when another voice is similarly input to the determination circuit 35 as an input pattern, the comparison circuit 36
The pattern registered in the memory circuit 34 is compared with the input pattern from the determination circuit 35, and if the pattern distance is relatively small, the input voice matches the registered pattern and there is a pattern distance. If so, find the next pattern (step S1).
Next, check for the presence or absence of the next pattern (step S2),
If yes then compare again, if not and step
If it matches the pattern in S1, the result is displayed on the display device (step S3). In this way, the input voice is displayed.

Now, if the voice recognition port shown in Fig. 2 is used in the tile peeling detection device shown in Fig. 1,
The comparison work is relatively simple and reliable.

However, in the case of voice, for example, the normal pronunciation of "a" lasts about 0.3 seconds, but in the case of a percussion sound, it lasts only about 10 milliseconds. Therefore, if the impact sound is discriminated by a normal commercially available voice recognition means, it will be inaccurate and the correct state of peeling, that is, the position, size, etc. of the peeling cannot be determined.

[Object of the Invention] Therefore, an object of the present invention is to provide a method for detecting peeling of a wall tile, which can accurately determine the state of peeling of a tile from the impact sound using ordinary voice recognition means.

[Structure of the Invention] According to the present invention, a received impact sound signal is temporarily stored, a repetitive signal of the temporarily stored impact sound signal is generated, a characteristic pattern of the impact sound is determined from the repeated signal, and a characteristic pattern of the impact sound is determined from the repeated signal. The feature pattern is compared with the feature pattern of the registered signal.

[Operations and Effects of the Invention] Therefore, due to the repetitive signal, the waveform of a short impact sound of about 10 milliseconds can be changed to a time close to that of a sound, e.g.
The waveform is approximately 0.3 seconds long, making it easy to compare and distinguish. Furthermore, since the signal is a repeated signal, the characteristics of the impact sound are not changed in any way, and the degree of peeling can be reliably determined.

[Embodiments] Hereinafter, embodiments of the present invention will be described with reference to the drawings from FIG. 3 onwards.

In FIG. 3, the impact hammer 40 is equipped with a load cell 41, and a microphone 4 is provided near the impact hammer 40.
2 is provided. The impact sound is input from the microphone 42 to a preprocessing circuit 43. Since harmful sounds such as traffic noise and wind noise enter from the microphone 42, these harmful sounds are processed by the pre-processing circuit 43.
A bypass filter is provided to remove the light, and a low-pass filter is provided to prevent aliasing.

The impact sound processed by the preprocessing circuit 43 is input to the AD conversion circuit 44. The AD conversion circuit 44 operates based on the signal from the load cell 41, and the impact sound is corrected according to the magnitude of the signal from the load cell as necessary and stored in the primary storage circuit. Next, a repetitive waveform is generated by the repetitive waveform generating circuit 46. For example, the waveform stored in the primary memory circuit 45 is as shown in FIG. 4, and since the waveform of the batter is attenuated in about 10 milliseconds, it is difficult for the voice discrimination circuit shown in FIG. be. However, the repetitive waveform generating circuit 46 repeatedly generates n (for example, 6) waveforms as shown in FIG. 5, for example. Therefore, a waveform of about 0.3 seconds can be input to the voice discrimination circuit 47.

In this way, the voice discrimination circuit 47
By registering the pattern of the impact sound (for example, as shown in FIG. 2), the degree of peeling, that is, the size, depth, etc., can be clearly determined from the impact sound. Since the sound pattern of the impact sound can be memorized and registered for each site, the work can be carried out easily.

[Summary] As described above, according to the present invention, since the impact sound is converted into a relatively long-time waveform using a repetitive waveform, it is possible to accurately determine the state of tile peeling using a normal sound discrimination device. .

In particular, it can be connected to a regular microcomputer to automate tile peeling inspection and save labor. Furthermore, even if the data of healthy parts differs from site to site, it is sufficient to memorize the pattern for each site, which simplifies the work. Judgment results can be displayed, recorded, and printed out for comparison at each site.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a wall tile peeling detection device which is the basis of the present invention, Fig. 1a is an explanatory diagram of its striking part, Fig. 2 is a block diagram showing a known voice discrimination device, and Fig. 3 is a diagram of the present invention. FIG. 4 is a diagram showing a waveform of a percussion sound, and FIG. 5 is a diagram showing a waveform repeatedly generated according to the present invention. 42...Microphone, 45...Primary memory circuit, 46
. . . Repetitive waveform generation circuit, 47 . . . Voice discrimination circuit.

Claims (1)

[Claims] 1. In a wall tile peeling detection method that involves hitting a tile surface attached to a building wall, receiving the impact sound generated at the time, and determining the peeling state of the tile based on the received signal. , temporarily stores the received impact sound signal, generates a repeating signal of the temporarily stored impact sound signal, obtains a characteristic pattern of the impact sound from the repeated signal, and converts this characteristic pattern into a characteristic pattern of the registered signal. A method for detecting peeling of wall tiles, which is characterized by comparing with.