JPH07146129A - Apparatus for measuring plate thickness - Google Patents

Abstract

PURPOSE:To measure the plate thickness of a steel plate in a labor-saving and power- saving manner, safely and quickly even in a working site in which working surroundings are bad by a method wherein rust-removing utensils, medium coating utensils and probes which have been installed so as to protrude on a rotating disk at equal intervals and in parallel are moved on the same circumference by a remote control operation. CONSTITUTION:Rust-removing utenils 1, medium coating tubes 2 and ultrasonic probes 3 are attached on the same circumference of a rotating disk 5 at equal intervals and in parallel via spring-loaded air pistons 4. Then, by the command signal of a control device, the pistons 4 are advanced. The rust-removing utensils 4 are moved to their operating positions, they are vibrated little by little, and they remove rust from a face to be inspected while they are being circled as the disk 5 is turned. After the rust has been removed, the rust-removing utenils 1 are retreated to thie standby positions, and the disk 5 is turned by a 1/3-turn by means of a motor 6. The coating tubes 3 are advanced to their operating positions, the face, to be inspected, from which the rust has been removed is coated with a medium, they are returned to their standby positions, and' the disk 5 is turned by a 1/3-turn. Lastly, the probes 3 are advanced to their operating positions, and they measure the plate thickness of the face, to be inspected, which has been coated with the medium.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate thickness measuring device for steel plate structures such as ships, bridges, buildings and tanks.

[0002]

2. Description of the Related Art For example, in order to measure the plate thickness of steel plate structures such as ships, bridges, buildings, and tanks, conventionally, the surface to be inspected of a target steel plate is first derusted and polished, and then ultrasonic waves are transmitted. The application work of a medium such as a liquid is improved, and finally the ultrasonic probe is pressed to measure the plate thickness. By the way, a series of works including a first work using such a rust remover, a second work using a medium storage cylinder, and a third work using an ultrasonic probe are all performed by a worker. It is done only by hand.

[0003]

However, such means have the following problems. (1) Since the rust remover, the medium storage cylinder, and the ultrasonic probe are separate and independent equipments to be used, it is necessary to change the equipment to be used for the work procedure each time, and the work efficiency is poor. (2) Since the rust removal accuracy (surface accuracy), medium coating accuracy (coating thickness, area), and adhesion of the probe pressing surface directly affect the measurement value of the plate thickness measurement accuracy of the test steel plate, A skilled person is required. (3) It becomes difficult to work at a work site where working environment conditions such as a high place and a narrow place are not good.

The present invention has been proposed in view of the above circumstances, and enhances work efficiency and measurement accuracy, and at the work site where the work environment is not good, saves labor, labor, and safety, and measures the plate thickness quickly. It is an object of the present invention to provide a high-performance and economical plate thickness measuring device that is capable of performing.

[0005]

To this end, the present invention relates to a plate thickness measuring device for a steel plate using an ultrasonic thickness gauge, in which concentric circles of a rotating disk rotated by a motor are parallel to each other at equal intervals. Three fluid pressure cylinders that are projected and can move forward and backward, and can be stopped at the forward operation position and the backward standby position, and cylindrical rust removal that is coaxially projected at the tip of each fluid pressure cylinder. Tool, medium coating cylinder, ultrasonic probe, and the rust removal tool are moved to the operating position to remove the rust on the surface to be inspected, and then returned to the standby position and the rotary disc is moved to 1 / After three rotations, the medium coating cylinder is moved to the operating position to coat the surface of the test surface after rust removal with the medium and then returned to the standby position, and the rotary disc is rotated 1/3, and finally Move the ultrasonic probe to the above operating position and With this After detecting the thickness of the test surface back to the standby position, characterized in that comprises a control circuit for 1/3 rotating the rotary disk.

[0006]

According to this structure, the following actions are performed. (1) A structure in which a rust remover, a medium applicator, and a probe on a surface to be inspected are projected in parallel on a rotating disc at equal intervals and moved on the same circumference by a motor, an air valve, and By performing remote control of the motor automatically, pre-processing, measurement preparation, and measurement can be performed continuously and quickly, improving work efficiency. (2) Motility of the rust remover, medium application amount, probe contact angle,
By making the pressing force constant, the measurement accuracy is stabilized and improved. (3) Since the inspection unit, the control unit, and the data processing unit are individually configured to allow remote control, data recording, and processing, unattended automatic inspection is possible, and safety and work cost can be reduced.

[0007]

1 is an overall side view, FIG. 2 is a vertical cross-sectional view showing a spring-loaded air piston of FIG. 1, and FIG. 3 is an overall system diagram of FIG. is there.

First, in FIGS. 1 and 2, reference numeral 1 denotes a tubular rust remover which moves in forward and backward directions by an air piston to remove surface rust on a surface to be inspected, and a commercially available product can be used. it can. Reference numeral 2 is a medium coating cylinder that is pressure-fed by air and applies a medium that assists ultrasonic conduction from the tip to the surface to be measured. Reference numeral 3 is a conventional ultrasonic wave that transmits and receives ultrasonic waves to detect the thickness of the surface It is a probe, and the above-mentioned 1, 2 and 3 are provided in parallel at equal intervals on the same circumference of the rotating disk 5 via a spring-loaded air piston 4. 4 is an air piston with a spring, which moves to the forward and backward positions by aerodynamic force and a spring. The rust remover 1, the medium coating cylinder 2, and the ultrasonic probe 3 attached to the tip are in the operating position and the standby position. After moving to the position, the switching in the front-back direction is controlled by opening and closing the air valve switching valve. Reference numeral 5 denotes a rotating disk, on which a rust remover 1, a medium coating cylinder 2, and an ultrasonic probe 3 are attached at equal intervals on the same circumference of the disk via an air piston 4. The plate is intermittently rotated by a motor 6 as will be described later. Reference numeral 6 is a motor for rotating the rotating disk 5 and is attached to the fixed plate.

Next, in FIG. 3, reference numerals 7, 8 and 9 denote air switching valves for switching the forward and backward movements of the spring-loaded air piston 4. It is a directional valve that communicates air to the piston side when moving the spring-loaded air piston 4 in the forward direction, and switches to the direction in which the air on the piston side is discharged to the atmosphere when the piston is retracted. Reference numeral 10 denotes an air control valve for feeding the medium in the medium coating cylinder 2 under pressure. The medium is a liquid or jelly and is coated in order to improve the propagation of ultrasonic waves. Reference numeral 11 is an air control valve for driving the rust remover 1, 12 is an air source, and the rust remover 1 and the medium are provided via the air valves 7, 8, 9, 10, 11 via the spring-loaded air piston 4. Coating tube 2, ultrasonic probe 3
To drive. 13, 14, 15, 16, 17, 17 and 18 are air pipes, 19, 20, 21, 22, 23 and 24 are electric signal lines, 25 is a drive amplifier, and is a motor 6 and a cable for rotating the rotary disk 5. Connected and control device 2
In response to the signal of 8, the rotation direction and speed of the motor 6 are changed. Reference numeral 26 denotes an amplifier of the ultrasonic probe 3, which has a transmission / reception signal transmitting / receiving circuit and an arithmetic circuit built therein. 27
Is a data processing device, which receives the signal from the amplifier 26 and processes the measured plate thickness data. Reference numeral 28 denotes a control device, which is connected to the air switching valves 7, 8, 9 and the air control valves 10, 11 with the drive amplifier 25 and the data processing device 27 by a cable, and issues an operation command for these to operate the device ( Command control of rust removal, medium application, measurement, data processing).

In such an apparatus, the detection unit shown in FIG. 1 is attached to a robot or a moving device and arranged so as to face a surface to be inspected. At that time, the distance to the surface to be inspected is within the stroke of the air piston 4 with spring. The control device 28 transmits a command signal to the air switching valve 9 via the electric signal line 23, and switches the spring-equipped air piston 4 in the forward direction (communication to the piston side). After the spring-loaded air piston 4 moves forward and the rust remover 1 moves to the operating position, the air control valve 11 is activated, and the rust remover 1 vibrates back and forth in small steps back and forth by the internal air motor to rotate the rotating disk 5. While turning along with the rotation of, the rust on the surface to be inspected is removed by cutting. The termination of the rust removal work shall be performed by time control or by checking with a surveillance camera attached to a moving device (not shown). When the rust removal work is completed in this way, the air control valve 11 is closed and the movement of the rust removal tool 1 is stopped. Next, when the air switching valve 9 is switched to the direction in which the air in the spring-loaded air piston 4 is discharged to the atmosphere, the spring in the spring-loaded air piston 4 causes the rust remover to retract to the standby position, and the rotation disk 5 to move. 1/3 turn and stop.

Next, the motor 6 is driven via the drive amplifier 25 to advance the medium coating cylinder 2 from the standby position to the operating position in the same manner as described above, and then the rotary disk 5 is rotated.
Since the medium coating cylinder 2 is mounted on the same circumference as the rust remover 1, the rotary disk 5 stops after rotating 1/3.
When the positioning of the medium coating cylinder 2 is completed, the motor 6 is stopped, and then the air switching valve 8 is operated to drive the spring-loaded air piston 4 via the air pipe 15 to move the medium coating cylinder 2 to the operating position. Move forward and approach the rust removal point (measurement point). Next, the air control valve 10 is operated for a certain period of time, and the medium in the medium coating cylinder 2 is pressure-fed and coated on the surface to be inspected. After the coating is completed, the air control valve 10 is closed, and then the air switching valve 8 is switched to the atmosphere release side, whereby the spring-loaded air piston 4 is retracted, and at the same time, the medium coating cylinder 2 is also retracted and returned to the standby position.

Next, the motor 6 is rotated again by 1/3 to bring the ultrasonic probe 3 to the same location (measurement location). When the rotation position setting is completed, the air switching valve 7 is operated, and the ultrasonic probe 3 is moved to the operating position by the forward movement of the spring-loaded air piston 4 via the air pipe 14, and the tip thereof is measured via the medium. Contact points. After the contact, the control device 28 sends an ultrasonic transmission / reception operation command to the amplifier 26, and at the same time operates the data processing device 27 to measure the plate thickness. After the measurement, the rotating disk rotates 1/3. After the series of operations from the rust removal to the measurement data processing is completed, the control device 28 sends a completion command to the mobile device, and the measurement of one point is completed. After receiving the completion command, the moving device moves the detection unit to the next measurement point.

By repeating such an operation, it becomes possible to automatically measure the plate thickness unattended. Note that the positioning of the detection unit may be performed by using a moving device such as a robot to control the distance to the test unit, or by mounting a distance sensor for the test surface on the detection unit.

[0014]

According to such an apparatus, the following effects can be obtained. (1) Since the manual work that has been performed conventionally is eliminated and unmanned automation is performed, safe, quick and uniform measurement accuracy can be secured. (2) The number of measurement points, which had been decided on the premise that the worker manually performed it, can be shortened by unmanning and speeding up, so that the total number of measurement points can be increased and the inspection density can be increased. , The safety of structures etc. is improved. (3) The so-called 3K is used for inspecting workers, which is the current trend in society.
Work can be freed from hard, messy, and difficult work. (4) The work cost is significantly reduced.

In short, according to the present invention, in a plate thickness measuring device for a steel plate using an ultrasonic thickness gauge, the rotary discs rotated by a motor are provided on the concentric circles at equal intervals so as to project in parallel with each other. Three fluid pressure cylinders that can move forward and backward and can be stopped at the forward operation position and the backward standby position, and a cylindrical rust remover and a medium coating cylinder that are coaxially projected at the tip of each fluid pressure cylinder. ， With ultrasonic probe,
After moving the rust removal tool to the operating position to remove the rust on the surface to be inspected, return it to the standby position and rotate the rotating disk 1/3, and then operate the medium coating cylinder to the above operation. After moving to the position and applying the medium to the surface to be inspected after the rust removal, the medium is returned to the standby position, the rotary disk is rotated 1/3, and finally the ultrasonic probe is moved to the operating position. It has a control circuit that detects the plate thickness of the surface to which the medium has been applied and then returns it to the standby position and rotates the rotating disc by 1/3 to improve the work efficiency and measurement accuracy and the work environment. The present invention is extremely useful industrially, because a high-performance and economical plate thickness measuring device capable of labor-saving, labor-saving, and safe and quick plate thickness measurement can be obtained even at unfavorable work sites.

[Brief description of drawings]

FIG. 1 is a side view of a main part according to an embodiment of the present invention.

2 is a longitudinal sectional view showing the air piston with spring of FIG. 1. FIG.

FIG. 3 is an overall operating system diagram of the apparatus of FIG.

[Explanation of symbols]

 1 Rust removal tool 2 Medium coating cylinder 3 Ultrasonic probe 4 Air piston with spring 5 Rotating disk 6 Motor 7, 8, 9 Air switching valve 10, 11 Air control valve 12 Air source 13, 14, 15, 16, 17,18 Air piping 19,20,21,22,23,24 Electric signal line 25 Drive amplifier 26 Amplifier 27 Data processing device 28 Control device

Claims (1)

[Claims] 1. In a plate thickness measuring device for a steel plate using an ultrasonic thickness gauge, the concentric circles of a rotating disk rotated by a motor are projected in parallel with each other at equal intervals and can be moved forward and backward, respectively. Three fluid pressure cylinders that can be stopped at the operating position and the backward standby position, and a tubular rust remover that is coaxially projected at the tip of each fluid pressure cylinder,
After moving the medium coating cylinder, ultrasonic probe, and the rust removal tool to the operating position to remove the rust on the surface to be inspected, return it to the standby position and rotate the rotating disk 1/3. Then, the medium coating cylinder is moved to the operating position, the medium is coated on the surface to be inspected after rust removal, the medium is returned to the standby position, the rotary disc is rotated 1/3, and finally the ultrasonic wave is removed. The probe is provided with a control circuit for moving the probe to the operating position to detect the plate thickness of the surface to which the medium has been applied, and then returning it to the standby position and rotating the rotating disc by 1/3. Characteristic plate thickness measuring device.