JPH0381661A - Ultrasonic flaw detection device - Google Patents

Abstract

PURPOSE:To obtain the lightweight ultrasonic flaw detection device which enables the presence position of a defect to be found at a glance by removing the A-scope display monitor of an ultrasonic flaw detector and displaying an A scope on the display of a personal computer. CONSTITUTION:An A/D & counter board 21 inputs a flaw detection waveform and a flaw detection timing signal from the pulser receiver part 22 of the ultrasonic flaw detector 1 and generates a flaw detection gate according to data on a gate start point and an end point supplied from the personal computer 4 through a bus driver board 23 and a photocoupler 24. Echo height and a beam path length value obtained by the ultrasonic flaw detector 1 are read by the personal computer 4 to display the A scope on the display of the personal computer 4. Thus, the presence position of the defect is found at a glance and the lightweight ultrasonic flaw detection device is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an ultrasonic flaw detection device for detecting internal defects or welding defects in materials, structures, etc.

[Prior art] Ultrasonic flaw detection tests to determine the presence or absence of internal defects or welding defects in materials or structures are performed using an ultrasonic flaw instrument with a CRT that is manually scanned by a worker, and an A-scope imaged on the CRT. The 0 criteria for determining defects based on waveforms has been standardized, but since the determination is made by the operator,
Requires skill.

[Problem to be solved by the invention] However, in conventional ultrasonic flaw detectors, the ultrasound echo height and beam path reflected from the defective part are only grasped as analog signals. In addition to the problem that it is difficult to understand, there is also the problem that it requires skill to intuitively grasp the location of a defect based on the flaw detection waveform on a CRT. Additionally, when a data processing function is attached, there is a problem that the weight becomes heavy and portability is lost.

This invention solves the above-mentioned problems of the prior art,
The purpose of the present invention is to provide an ultrasonic flaw detection device that automatically removes noise, allows the nine positions of defects to be seen at a glance, and is light in weight.

[Means for Solving the Problems] The ultrasonic flaw detection device according to the present invention includes an ultrasonic flaw detector, a position detector that detects the position of the ultrasonic probe, and a flaw detection device that detects the detected flaw received by the ultrasonic probe. An A/D converter that A/D converts the ultrasonic signal from the object and the position signal of the position detector of the probe, and a probe that receives the A/D converted ultrasonic signal and the position signal. It consists of a personal computer that displays the flaw detection waveform according to the position of the child and the data processed defect image.The A-scope display monitor of the ultrasonic flaw detector can be removed and the A-scope can be displayed on the computer display. The present invention is an ultrasonic flaw detection device configured as described above, and is an ultrasonic flaw detection device configured such that the gate range of the ultrasonic flaw detector can be changed according to the position signal of the probe.

[Function] The ultrasonic flaw detection device according to the present invention includes an ultrasonic flaw detector, a position detector that detects the position of the ultrasonic probe, and an ultrasonic signal from an object to be detected that is received by the ultrasonic probe. an A/D converter that A/D converts the A/D converted ultrasonic signal and the position signal of the probe position detector; It consists of a personal computer that displays flaw detection waveforms and data-processed defect images. Therefore, the position of the defect can be instantly determined from the image, and since the CRT is removed, the weight can be reduced, and portability is maintained. In addition, in this ultrasonic flaw detector, the gate range can be changed according to the position signal of the probe, so it is possible to set the appropriate gate range according to the position of the probe. , it is possible to accurately determine the presence or absence of defects without picking up noise.

[Embodiment] An ultrasonic flaw detection device according to an embodiment of the present invention will be explained with reference to FIGS. 1 and 2. As shown in FIG. 1, this ultrasonic flaw detection device consists of an ultrasonic flaw detector 1, a hand scanner 3 that scans an ultrasonic probe 2 and detects the position of the probe 2, and a hand scanner 3 that scans an ultrasonic probe 2 and detects the position of the probe 2. An A/D converter (built in the ultrasonic flaw detector) that converts the received signals regarding the ultrasound echo height and beam path from the object to be tested and the position signal of the probe 2 from the hand scanner 3 into digital form. ), the A/D converted ultrasonic signal and the position signal are received, and the flaw detection waveform corresponding to the position of the probe 2 and the data-processed defect image are displayed as images, and the flaw detection data is stored. It consists of a personal computer 4 that can create a flaw detection report. and,
The ultrasonic flaw detector 1 does not include a CRT monitor, and the flaw detection waveform is displayed on the display of the personal computer 4.

FIG. 2 is a plan view showing the configuration of the hand scanner 3. As shown in FIG. The hand scanner 3 includes an X-axis seal 5 and a rotary encoder 6 for detecting the position of the probe 2 in the X-axis direction.
In order to detect the position of the probe 2 in the Y-axis direction, the main components are a Y-axis lever 7 that is arranged perpendicular to the X-axis and moves left and right on the X-axis, and a rotary encoder 8. ing. The position of the probe 2 in the X-axis and Y-axis directions is detected as follows.

That is, a rack 9 is attached to the X-axis seal 5, and a pinion 1 that meshes with the rack is attached to the rotary encoder 6.
0 is provided, and the position of the probe 2 in the X-axis direction is detected by the rotation of the pinion 10 as the probe 2 moves in the X-axis direction. In addition, the Y-axis rail 7 has a rack itself, and a pinion 11 that meshes with this is provided on the rotary encoder 8, and the position of the probe 2 in the Y-axis direction is determined by the probe 2. This is detected by the rotation of the pinion 11 as the pinion 11 moves in the Y-axis direction. The probe 2 is fixed by a probe fixing screw 14 to a universal joint 13 attached to the tip of a support member 12 that moves together with the rotary encoder 8 on the Y-axis guide 7.

FIG. 3 is a block diagram of this ultrasonic flaw detection device. The A/D & counter board <A/D converter) 21 inputs the flaw detection waveform and flaw detection timing signal from the pulsar receiver part 22 of the ultrasonic flaw detector 1, and inputs the flaw detection waveform and flaw detection timing signal from the personal computer 4 to the bus driver board 23 and the photocoupler. A flaw detection gate is created according to the gate starting point and ending point data given via the board 24. A/D & counter board (A/D converter) 2
1 has a 20 MHz clock generator inside.
Based on this reference, time measurements of the gate start point, end point, and beam path are performed in units of 5 Q n5 ec.

While the gate is open, the echo height is held at its peak value, and when the gate is closed, sampling and A/D
The personal computer 4 can read this value. Furthermore, by comparing before and after the peak hold circuit, it is possible to detect the occurrence of a peak echo within the gate, hold the counter value, and read this as a beam path value by the personal computer 4.

Figure 4 shows the flaw detection data collection flowchart. When programming data collection, it is important to note that writing data for gate start and end points and reading data for echo height and beam path must be done while the gate is closed. This means that it must be done. The time that this gate is closed varies depending on the measurement range of the ultrasonic flaw detector, but is approximately 0.25 to 0.4 m5ec, and taking this into consideration, the program was written in assembler. As a result, gate control and flaw detection data can be taken in at a rate of 200 I18 per second, and sufficient flaw detection data of the welded portion can be collected.

In addition, in this ultrasonic flaw detection device, for example, the structure 3
The defective fork in the welded part 32 of No. 1 is detected in the personal computer 4 based on the flaw detection data imported into the personal computer 4 as defect images of the C, B, and ST scans of the probe 2 in three directions as shown by the arrows in FIG. An image can be displayed on the screen of the computer 4.

Furthermore, a report of the flaw detection results can be automatically created according to the flowchart shown in FIG.

Since the ultrasonic flaw detection apparatus according to one embodiment of the present invention is configured as described above, the magnitude of the ultrasonic echo and the beam path corresponding to each position of the flaw-detected object can be inputted into a personal computer as digital signals. Therefore, in addition to displaying the flaw detection waveform on the screen of a personal computer, it is also possible to display an image by processing the image of the defect. Since the flaw detection data can be recorded on a floppy disk built into the personal computer, various flaw detection reports including image displays can be created.

In addition to the ultrasonic flaw detection device according to one embodiment of the present invention described above,
It is also possible to add a function to change the gate range according to the position of the probe. By providing such a function, it is possible to accurately judge whether there is a defect in cases where noise will be picked up unless an appropriate gate is set, such as when detecting flaws in welds. Become.

[Effect of the invention] This invention enables portable data processing I! l! A functional ultrasonic flaw detection device can be obtained, ultrasonic flaw detection data can be easily recorded, and the position and shape of defects can be accurately grasped.

[Brief explanation of drawings]

1st [! I is an explanatory diagram showing the device configuration of an ultrasonic flaw detection device according to one embodiment of the present invention, FIG. 2 is an explanatory diagram showing the configuration of a hand scanner, FIG. 3 is a block diagram of the ultrasonic flaw detection device, and FIG. FIG. 5 is a perspective view showing the scanning direction of the probe, and FIG. 6 is a flowchart for automatically creating a report. 1... Ultrasonic flaw detector, 2... Probe, 3... Hand scanner, 5... X-axis seal, 6.8... Encoder, 7... Y-axis seal.

Claims (2)

[Claims] (1) An ultrasonic flaw detector, a position detector that detects the position of the ultrasonic probe, an ultrasonic signal from the object to be tested received by the ultrasonic probe, and the position of the probe position detector Signal and A
A/D converter that performs /D conversion, and a personal device that receives the A/D converted ultrasonic signal and position signal and displays an image of a flaw detection waveform according to the position of the probe and a data-processed defect image. 1. An ultrasonic flaw detection device comprising a computer and configured to display the A scope on the display of the personal computer by removing the monitor for displaying the A scope of the ultrasonic flaw detector. (2) The ultrasonic flaw detection apparatus according to claim 1, characterized in that the gate range of the ultrasonic flaw detector can be changed in accordance with the position signal of the probe.