JPH0259659A - Peeled tile detecting device - Google Patents

Abstract

PURPOSE:To surely and easily detect peeling of a tile by cascading a tile, a vibration pickup, an amplifier, and an exciter for abutting on the tile, since a peeled tile vibrates more easily than a normal tile. CONSTITUTION:A tile 3 is brought to adhesion to a member to be stuck 1 such as concrete, etc., through an adhesive 2. Subsequently, an exciter 4 and a vibration pickup 5 are allowed to abut on this tile 3. Next, the vibration pickup 5 is connected to an amplifier 9 through an amplifier 6, a band pass filter 7 and a sensitivity controller 8, and also, through a diode 10, etc., a detection output of an oscillation is fetched in an output terminal OT. Also, the exciter 4 is connected to a connecting point N1 provided between the amplifier 9 and the diode 10. In such a way, a peeled tile detecting device being small in size and light in weight can be obtained with a simple constitution, and peeling of the tile can be detected surely and easily.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in a device for detecting peeling of a tile adhesively applied to a wall or floor of a building.

In recent years, buildings have become noticeably taller, and moreover,
Tiles are often used to finish the outer walls.

In such cases, it is very important for safety to inspect whether or not the tiles are firmly attached to the wall surface.Therefore, it is important to realize a device that can reliably and easily detect the peeling of tiles. [Prior Art] Conventionally, whether or not a tile has peeled off has been detected by the following means. That is, +1> Means for the officer craftsman to tap the tiles one by one and, depending on the sound, to distinguish between those that are firmly stuck and those that are #JIWl. (3) When a building is being cooled or heated, there is air behind the peeled tiles. A layer is formed and the thermal resistance increases.Therefore, the surface temperature of the peeled tile is higher during cooling in the summer and lower during heating during the current season, compared to the normal tile.
There is a known method of detecting whether or not the tiles are peeling off based on the temperature difference, which is different from that of normal tiles.

[Problem to be solved by the invention]

If the method listed in (1) above is used, a certain degree of specialized experience is required, and not everyone can carry it out.Moreover, in the case of building exterior walls, it is necessary to work at heights. There is a danger involved.

If the method listed in (2) above is adopted, the device will be large and complicated, resulting in high manufacturing costs.In addition, in the case of the external wall of a building as mentioned above, such a device cannot be handled by humans. It is preferable to use robots as it is dangerous, but since the equipment is basically large, it is becoming increasingly large, and in order to increase work efficiency, it is necessary to operate multiple devices at the same time. When attempting to do so, it is not easy to miniaturize them so that they can be arranged and operated at a tile spacing, and even if it were possible,
Impact sounds and operating sounds from adjacent devices affect the analysis results, increasing the risk of false detection.

If the method listed in (3) above is adopted, the radiation thermometer that measures the surface temperature and its operating cost are expensive, and the work can only be done during the seasons and times when the target building is being cooled or heated. Moreover, if insulation is used in some parts of the outer wall or if some parts of the outer wall are thick, the thermal resistance will increase and false detection will occur.Furthermore, if some parts of the wall are exposed to sunlight, There are many problems such as erroneous detection if the sensor is in the shade.

The present invention has a simple configuration and is small and lightweight, so it can be supplied at low cost, and as a portable device, it can be easily used not only by professionals but also by the general public. , attempts to provide a peeling tile detection device that can be easily robotized.

[Means to solve the problem]

The inventor of the present invention has focused on the fact that peelable tiles are outstanding in terms of their ease of vibration compared to normal tiles.

FIGS. 1 and 2 show characteristic diagrams regarding the vibration acceleration level when a tile is struck and vibrated.

In FIG. 1, the horizontal axis represents the tile thickness, and the vertical axis represents the relative vibration acceleration level, with ○ marks indicating normal tiles and square marks indicating peeled tiles.

In FIG. 2, the length of the short side of the tile is plotted on the horizontal axis, and the relative vibration acceleration level is plotted on the vertical axis, with the O symbol indicating a normal tile and the square symbol indicating a peeled tile.

As is clear from Figures 1 and 2, the thickness of the tiles,
Also, no matter which side length changes, the ease with which the tile is vibrated can be clearly distinguished from that of the normal tile.

Also, the audible frequency range is 1 (KHz) to 20
There is a characteristic that there is a large difference between (K)Iz), and it is very effective for listening judgment.

Therefore, if an oscillation circuit is configured including an exciter, tile, vibration pink-up, and amplifier, if the tile is peeled off, the oscillation circuit will oscillate because there is little vibration attenuation.
In addition, if the tile is normal, the oscillation circuit will not oscillate because the vibration attenuation is large, and whether or not it is oscillating can be easily determined by listening to the oscillation sound from the exciter. Of course, it is also easy to electrically detect and provide a visible display.

For this reason, in the peeling tile detection device according to the present invention, a vibration pickup (for example, vibration pink-up 5) and an amplifier (for example, amplifiers 6 and 9) that come into contact with a tile (for example, tile 3) and Vibrators (for example, vibrator 4) that come into contact with the tiles are connected in cascade.

[Effect]

By adopting the above means, when the vibrator and the vibration pickup are brought into contact with the tile, if the tile is peeled off,
Oscillation occurs because of the ease with which it vibrates, and if it is not peeled off, oscillation does not occur because it is difficult to vibrate.The difference can be determined by listening, electrical display, etc.
This can be easily determined through computer-based analysis.

〔Example〕

FIG. 3 shows an explanatory diagram of main parts for explaining the circuit and surroundings of one embodiment of the present invention.

In the figure, 1 is a member to be bonded such as concrete, 2 is an adhesive, 3 is a tile, 4 is an exciter, 5 is a vibration pickup, 6 is an amplifier, 7 is a bandpass filter, 8 is a sensitivity adjuster,
9 is an amplifier, 10 is a diode, 11 is a resistor, 12 is a capacitor, N1 is a connection point, and OT is an output end.

In each member shown, the vibration exciter 4 has a frequency of 200 (Hz).
) to 20 (KHz) can be used as piezoelectric or electrodynamic transducers that can convert electrical signals into mechanical vibrations. For example, ceramic speakers and passive piezoelectric buzzers are inexpensive. Moreover, the performance is also sufficient.

Vibration pickup 5 is 200 ()1z) ~20 [
A piezoelectric type, electrodynamic type, capacitive type, photoelectric type vibration sensor having sensitivity in a frequency range of about K)Iz) can be used, and a separately excited piezoelectric buzzer can also be used for this. It is effective for the bandpass filter 7 to have a passband of about 1 (Kllz) to 20 (Kllz) in which the vibration of the exfoliated tile appears prominently, and it is effective to have a pass band of about 1 (Kllz) to 20 (Kllz), where the vibration of the peeled tile is noticeable. If a type piezoelectric buzzer is adopted, it is not necessary because it has sensitivity in the same frequency region as the pass band. The sensitivity adjuster 8 is for controlling the input to the amplifier 9 so that oscillations are not generated when the tiles 3 are bonded normally, and is used as shown in FIGS. 1 and 2.
As explained with reference to the figures, there is a marked difference in the vibrating susceptibility between the peeled tile and the normal tile, so that adjustment is easy. The output of the amplifier 9 is positively fed back to the vibrator 4 from the connection point N1. The oscillation output itself can be taken out from the connection point N1, and the oscillation detection output can be taken out from the output terminal OT.
It is optional to drive a display circuit with each output or input it to a computer for analysis. Of course, as described above, if it is oscillating, it is possible to hear the oscillation from the exciter 4.

4 and 5 are diagrams representing the data obtained according to the embodiment of the present invention explained in connection with FIG. 3, with the horizontal axis representing time and the vertical axis representing connection. The oscillation output from point N1 is maintained respectively.

Figure 4 shows the case where peeled tiles are detected, and Figure 5 shows the case where peeled tiles are detected.
The figures each show cases in which normal tiles are detected.

As can be seen from the figure, separation of peeled tiles and normal tiles is reliable and easy.

The peeling tile detection device of the present invention is not limited to the above embodiments, and can be modified in many ways.
If a separately excited piezoelectric buzzer is used for the and vibration pickup 5, and an operational amplifier integrated into the amplifiers 6 and 9 is used, the configuration can be made simplest and at the lowest cost, and in this case, As mentioned above, the bandpass filter 7 becomes unnecessary. Furthermore, it is optional to arrange the vibrator 4, vibration pickup 5, etc. in one dimension according to the spacing between tiles, or in a two-dimensional array to improve work efficiency. No mutual interference was observed when the devices were operated.

〔Effect of the invention〕

In the peeled-off tile detection device according to the present invention, the vibration pickup and amplifier that come into contact with the tile, and the vibrator that comes into contact with the tile are connected in cascade.

By adopting such a configuration, when the exciter and the vibration pickup are brought into contact with a tile, oscillation will occur if the tile has peeled off, and no oscillation will occur if the tile has not peeled off, and the difference between them will be is very noticeable, and the presence or absence of the oscillation sound or oscillation signal can be easily detected. In addition, since the structure is simple, it is possible to make the entire device small and lightweight, and it is easy to mechanize so that many devices can be moved at the same time. Compared to manual work to check whether the adhesion is good or not, or equipment that simply uses mechanical power to do the work, it is much more efficient, and the work can be carried out unmanned and safely.

[Brief explanation of the drawing]

Figures 1 and 2 are characteristic diagrams regarding the vibration acceleration level when a tile is struck and vibrated, Figure 3 is an explanatory diagram of main parts for explaining the circuit and surroundings of one embodiment of the present invention, and Figure 4 5 and 5 respectively represent diagrams of data obtained in accordance with the embodiment of the invention described with respect to FIG. In the figure, 1 is a member to be bonded such as concrete, 2 is an adhesive, 3 is a tile, 4 is an exciter, 5 is a vibration pickup, 6 is an amplifier, 7 is a bandpass filter, 8 is a sensitivity adjuster,
9 is an amplifier, 10 is a diode, II is a resistor, 12 is a capacitor, N1 is a connection point, and OT is an output end. Patent Applicant Akira Iwase Attorney Patent Attorney Shoji Hitoya

Claims (1)

[Scope of Claim] A peeled-off tile detection device characterized in that a vibration pickup and an amplifier that are in contact with a tile, and a vibrator that is in contact with the tile are connected in cascade.