JPS62288510A - Alignment apparatus - Google Patents

Abstract

PURPOSE:To perform alignment with the corresponding on the other side of a thick wall of concrete, by transmitting a strong ultrasonic wave from one wall surface and numerically sensing the same on the side of the other wall surface through a probe. CONSTITUTION:The ultrasonic transmitter 1 led from an ultrasonic transmitting apparatus 3 equipped with a high voltage pulser is fixed to one wall surface 5 and a probe 2 having a preamplifier mounted therein is provided to the other wall surface 6 in a freely slidable manner and connected to a receiving apparatus 4 equipped with a voltmeter 4a. A strong ultrasonic wave is generated from the ultrasonic transmitting apparatus 3 to be transmitted from the wall surface 5 to the wall surface 6 through the transmitter 1 while the probe 2 is slid on the wall surface 6 and the ultrasonic wave sensed by the probe 2 is displayed on the voltmeter 4a through the preamplifier in the receiving apparatus 4. As mentioned above, when the strongest ultrasonic sensing quantity displayed by the voltmeter 4a is searched while the probe 2 is slid, the position of the probe 2 at that time corresponds to the position of the transmitter 1 on the opposite side wall surface 5.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention [Field of Industrial Application] The present invention provides an alignment device for determining the corresponding positions of one side and the opposite side of a concrete wall or a wall, for example. It is related to.

[Conventional technology] Conventional alignment devices include the following.

(1) Magnetic alignment device.

This is done when the wall surface is made of steel, and as shown in FIG.
The corresponding position with respect to the magnet 10 is determined by sliding the magnet along the wall surface 6 and searching for the position where the magnetic field is strongest.

(2) Positioning device using ferrite magnet, second
As shown in the figure, a ferrite magnet 10a is set on one wall 5, and an ultrasonic probe 12 is brought into contact with the other wall 6 and slid on the wall 6. The position corresponding to the ferrite magnet 10a is searched for while observing the echo of the ultrasonic wave detected by the magnet 12. 3(A) and (B) are waveform diagrams of ultrasonic echoes sensed by the probe 12, where 7 is a transmitted echo, 8 is a reflected echo from the wall surface 5, and 9 is a reflected echo from the ferrite magnet 10a. be. That is, when the probe 12 is at the position Pl, only the transmitted echo 7 and the reflected echo 8 from the wall surface 5 are detected as shown in FIG. As shown in FIG. 2, when the probe 12 reaches the position P2 corresponding to the ferrite magnet 10a, the waveform of the echo detected by the probe 12 includes the reflected echo 9 from the ferrite magnet 10a, as shown in FIG. appear. By searching for the position where the amplitude of this echo is highest, the position P2 corresponding to the ferrite magnet 10a can be found.

[Problem that the invention attempts to solve] Conventional alignment devices have the following problems.

(1) Magnetic alignment device.

If the wall surface is made of a non-magnetic material such as concrete, measurement is impossible, and the accuracy is poor due to the influence of the sensitivity of the magnetic sensor 11, resulting in an error (→±5 mm).

(2) Positioning device using ferrite magnets.

As the wall thickness increases, reflected echoes 8. and 9 become small, which makes it difficult to distinguish between them, so there is a limit to the applicable range.

Particularly in concrete walls, the applicable range is small due to poor propagation of ultrasonic waves.

[Means for Solving the Problems] The present invention has been made to solve these problems, and includes an ultrasonic transmitter that is attached to one wall and is equipped with a transmitter that transmits ultrasonic waves by a high-pressure pulser. a device, and a probe slidably disposed on the other wall, and a display device that receives ultrasonic waves from the transmitter with the probe and quantitatively displays the ultrasonic waves. An alignment device is provided, comprising a receiving device and a receiving device.

[Operation: A transmitter of an ultrasonic transmitter equipped with a high-voltage pulser is attached to one wall to transmit powerful ultrasonic waves, and a probe is slid in contact with the other wall to detect the ultrasonic wave. By quantitatively detecting the transmitted ultrasonic waves using the display of the receiving device, it is possible to know the corresponding position of the transmitter on the opposite wall.

[Embodiment] FIG. 1 is a schematic diagram of an embodiment of the present invention. In FIG. ing. The probe 2 is slidable on the other wall surface 6.
is a receiving device 4 with a built-in preamplifier and a voltmeter 48.
is connected to.

Next, this effect will be explained.

An ultrasonic transmitting device 3 equipped with a high-pressure pulser transmits powerful ultrasonic waves from the wall surface 5 to the wall surface 6 via the transmitter 1. On the other hand, the probe 2 is slid on the wall surface 6, and the ultrasonic waves detected by the probe 2 are displayed on the voltmeter 48 via the preamplifier in the receiving device. However, when the strongest ultrasonic sensing amount indicated by the voltmeter 48 is detected, the position of the probe 1 at that time is the corresponding position to the transmitter 1 on the opposite wall surface 5. In the embodiment, a voltmeter was used to display the detected amount of ultrasonic waves, but it goes without saying that the same effect can be obtained even if the detected amount is measured using other instruments.

[Effects of the Invention] According to the present invention, strong ultrasonic waves are transmitted from one wall surface,
By quantitatively sensing this on the other wall through a probe and displaying it, it is now possible to perform corresponding alignment even on thick concrete walls (400 mm or more), which was previously considered difficult. This is effective in improving alignment ability.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of an embodiment of the present invention, FIGS. 2 and 4 are schematic diagrams of a conventional example, and FIGS. 3(B) and 3(B) are waveform diagrams of a conventional example. 1: Ultrasonic transmitter, 2: Probe, 3: Transmitter, 4: Receiver, 5, 6: Wall surface, 7: Outgoing echo, 8: Reflected echo, 9: Reflected echo of ferrite magnet, 10: Magnet , 10a: ferrite magnet, 11: magnetic sensor, 12: probe.

Claims (1)

[Claims] An ultrasonic transmitting device is attached to one wall and includes an emitter that emits ultrasonic waves from a high-pressure pulser, and a probe is slidably disposed on the other wall. A positioning device comprising a receiving device equipped with a display that receives ultrasonic waves from a transmitter and quantitatively displays the ultrasonic waves.