JP2001141708A - Ultrasonic flaw detection simulation device - Google Patents

Abstract

(57) [Summary] The present invention enables easy and real-time input of flaw detection conditions, and numerically calculates / displays a propagation path / sound pressure of an ultrasonic wave in real time and with high operability. An ultrasonic flaw detection simulation device is provided. A means for measuring a current position coordinate on a flaw detection surface or a surface simulating a flaw detection surface of a test object, a means for measuring a rotational position on the surface, and an ultrasonic flaw detection device. There is provided a signal input device simulating an ultrasonic probe, comprising a means for setting a refraction angle, a frequency, and a propagation mode, and a means for transmitting those signals. [Effect] Even when the flaw detection conditions are changed / changed, the flaw detection conditions can be easily set / transmitted, so that a real-time and highly operable ultrasonic flaw detection simulation can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for simulating ultrasonic flaw detection for the purpose of predicting the results of ultrasonic flaw detection or training for ultrasonic flaw detection, and more particularly, to numerically determining the propagation path and / or sound pressure of ultrasonic waves. The present invention relates to an ultrasonic flaw detection simulation apparatus for calculating / displaying information.

[0002]

2. Description of the Related Art Generally, in ultrasonic flaw detection, an ultrasonic wave is transmitted inside a test object while a probe is moved along the surface of the test object, and the sound pressure of a received wave is measured. However, when the shape of the object to be inspected is complicated, it is difficult to predict the intensity of the ultrasonic wave that can be received at a certain probe position. Has been prevented. In addition, since only the sound pressure of the received wave is measured, it is difficult to grasp the state of propagation of the ultrasonic wave inside the object to be inspected. Not get enough information about

[0003] Therefore, an apparatus for numerically simulating actual ultrasonic flaw detection has been proposed.

As a conventional apparatus, for example, Japanese Patent Application Laid-Open No. 9-31
No. 8608. In a conventional ultrasonic simulation device, when inputting flaw detection conditions such as a probe position, a frequency, a refraction angle, and the like, a numerical value is input into an input area displayed on a screen using an input device such as a keyboard or a mouse. And a method of selecting a candidate from a selection list.

[0005]

However, the above-mentioned conventional method has the following problems. Unless the flaw detection conditions such as the probe position and ultrasonic wave incident direction are grasped numerically,
Since the condition cannot be input, a task of calculating and inputting a numerical value occurs. Therefore, the input operation of the flaw detection conditions becomes complicated. In addition, since the simulation is performed after the flaw detection conditions are input in advance, the conditions cannot be changed during execution of the simulation, and the operability lacks flexibility.

SUMMARY OF THE INVENTION An object of the present invention is to provide a device capable of easily inputting the flaw detection conditions in real time, so that even if the flaw detection conditions are changed / changed, the flaw detection conditions can be easily set / transmitted. Therefore, it is possible to perform an ultrasonic flaw detection simulation in real time and with high operability.

[0007]

An ultrasonic flaw detection simulation apparatus for realizing the above object is provided with one or two of the following signal input devices simulating an ultrasonic probe. .

The signal input device is means for measuring a current position coordinate when the input device is two-dimensionally scanned on a flaw detection surface or a surface simulating a flaw detection surface of an object to be inspected, It comprises a means for measuring the rotational position, a means for setting the refraction angle, frequency, and propagation mode used in ultrasonic flaw detection, a means for transmitting a signal representing the current position, and a means for transmitting a signal representing the rotational position. You.

According to this, the input device is two-dimensionally scanned on the scanning surface of the object to be inspected or the surface simulating the scanning surface, like an ultrasonic probe in actual ultrasonic flaw detection. The two-dimensional position coordinates of the simulated probe position are transmitted by the current position coordinates of the input device that simulates the acoustic probe, and the incident direction of the ultrasonic wave to the inspected object is transmitted by the rotational position of the input device. Refraction angle, frequency, the propagation mode setting means, the refraction angle used for ultrasonic flaw detection,
Frequency and propagation mode are transmitted.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a configuration diagram of an ultrasonic flaw detection simulation apparatus according to this embodiment. The signal input device 2 is connected to the computer 1. FIG. 2 shows a block diagram of the ultrasonic flaw detection simulation apparatus. The computer 1 includes an arithmetic processing unit 3, a bus 4, a display device 5, and a storage device 6.

FIG. 3 shows a configuration diagram of the signal input device 2.
FIG. 4 shows a block diagram of the signal input device 2. Input device 2
Are two-dimensional position coordinate measuring means 7 for sensing pressure, position coordinate indicating means 8 simulating a transmission probe for transmitting pressure by pressing against the position measuring means, and a position coordinate indicating means simulating a receiving probe. Nine steps, rotation position measuring means 10 for generating a signal according to rotation, cable 11 for transmitting a position signal, changeover switch 1 for selecting a plurality of items
2. Cable 13 for transmitting the signal generated from the switch
Consists of

As the two-dimensional position coordinate measuring means 7, for example, a panel in which piezoelectric sensors are distributed on a plane is used. As the position coordinate indicating means 8 and 9, for example, those having a shape simulating an ultrasonic probe and having a projection on the bottom surface are used. Two-dimensional position coordinate measuring means 7 and position indicating means 8, 9
On the other hand, a sensor using a phenomenon such as heat or light other than pressure may be used. Further, as a mechanism for simultaneously realizing the two-dimensional position coordinate measuring means 7 and the position measuring means 8 and 9, a sensor simulating an ultrasonic probe and having a two-dimensional movement sensor on its bottom surface, for example, a ball-shaped sensor A device having a rotating mechanism and a two-axis encoder linked to the rotating motion may be used. For example, a ball that senses rotation and an encoder that generates a signal in accordance with the rotation are used as the rotation position measurement unit 10.

The processing related to the ultrasonic flaw detection simulation includes the following three steps.

The first is a flaw detection condition input process. First,
Prior to performing the simulation, what can be set is input in advance to the calculation unit. The setting items include the size and shape of the object to be inspected, the speed of sound propagating in the object to be inspected, the frequency, the size, the shape, and the refraction angle of the ultrasonic probe. However, these items are set as initial values, and the settings can be changed during the simulation. For example, when changing the refraction angle of the ultrasonic wave with respect to the object to be inspected during the simulation, the refraction angle is changed at hand using the changeover switches 12 provided on the input devices 8 and 9 simulating the ultrasonic probe. I do. In addition to this, if there are parameters that you want to change at hand during simulation, you can register them flexibly by registering in advance which items to assign to each of the changeover switches provided on the input device. It is possible to respond to changes. Also,
In order to signal the end of setting or the start of simulation, the input device may be provided with another button-type switch. Position measuring means 7 and rotational position measuring means 10
Is measured periodically, and a signal is transmitted in synchronization with the measurement.

Therefore, the probe position and the ultrasonic wave incident direction on the object to be inspected are transmitted in accordance with the change in the value.

By this communication, the position coordinate designating means 8 and 9 are scanned on the flaw detection surface or a surface simulating the flaw detection surface so that actual flaw detection is performed without complicated numerical input.
Flaw detection conditions can be input, and simulation can be performed in real time. These setting values are stored in the storage device 6.

The second is an ultrasonic propagation path calculation process.

First, an ultrasonic transmission direction vector, which is an initial value, is generated from input or transmitted flaw detection conditions.
The transmission direction of the sound axis, which is the center of the ultrasonic wave, is determined by the amount measured by the rotational position measuring means 10. The directional angle, which indicates the degree of spread as the ultrasonic wave propagates, is determined by the frequency, size, and shape of the probe.

The geometric propagation path in a medium such as water or steel is calculated by modeling an ultrasonic wave to travel straight like a light beam. At that time, the sound pressure ratio of reflection / refraction at the boundary of the medium is calculated according to Snell's law, and the intensity of the vector corresponding to the ultrasonic wave propagation is changed. Also, the propagation time,
The propagation distance and the angle with respect to the boundary surface are calculated and used for evaluating the phase of the ultrasonic wave and the efficiency of transmission and reception. The ultrasonic wave propagation calculation processing is executed in the arithmetic processing unit 3 using the set values and software stored in the storage device 6. The result of the propagation path analysis is recorded in the recording device 6. Also, the display device 5
The results of the analysis are displayed geometrically.

The third is a sound pressure evaluation process.

The evaluation of sound pressure is roughly divided into two cases.

One is when the ultrasonic receiving area is close to the transmitting position (near field or Fresnel area), and the other is when the ultrasonic receiving area is far from the transmitting position (far field or Fraunhofer region).

When an ultrasonic wave is received in a so-called near-field, it is necessary to evaluate the sound pressure in consideration of the phase of the ultrasonic wave coming out of the surface of the vibrator. In the case of a far field, only the amplitude need be considered without considering the phase. The evaluation method of the received sound pressure is as follows.
How much has returned to the receiving area through reflection / refraction,
The number of the angles is evaluated by evaluating the received sound pressure by integrating the vector in the reception area. The sound pressure evaluation calculation processing is executed in the arithmetic processing unit 3 using the set values, the propagation path analysis results, and the software recorded in the recording device 6. The sound pressure evaluation result is recorded in the recording device 6. In addition, the sound pressure evaluation result is displayed on the display device 5 in two dimensions or three dimensions.
Display as a dimensional graph.

FIGS. 5, 6, 7, and 8 show flowcharts of the ultrasonic simulation processing of this embodiment.

[0026]

As described above, according to the present invention,
There is an effect that flaw detection conditions required for the ultrasonic flaw detection simulation can be easily input in real time.
This eliminates the task of digitizing flaw detection conditions and the task of inputting numerical values, and, like actual ultrasonic flaw detection, ultrasonic testing on the flaw detection surface of the inspection object or on a surface simulating the flaw detection surface By scanning an input device simulating a probe, an ultrasonic flaw detection simulation with high operability in real time can be performed. The reason is that, in the present invention, the current position coordinates and the rotational position of the input device are measured on the flaw detection surface or a surface simulating the flaw detection surface, and the flaw detection conditions are directly set by a signal input device having means for transmitting. This is because you can do it.

[Brief description of the drawings]

FIG. 1 is an apparatus configuration diagram of the present embodiment.

FIG. 2 is a block diagram of the device of the present embodiment.

FIG. 3 is a configuration diagram of a signal input device constituting the device of the present embodiment.

FIG. 4 is a block diagram of a signal input device constituting the device of the present embodiment.

FIG. 5 is a flowchart showing an ultrasonic simulation process according to the embodiment.

FIG. 6 is a flowchart showing a flaw detection condition input process in the ultrasonic simulation processing of the present embodiment.

FIG. 7 is a flowchart illustrating an ultrasonic wave propagation path calculation process in the ultrasonic simulation processing according to the present embodiment.

FIG. 8 is a flowchart illustrating an ultrasonic pressure evaluation process in the ultrasonic simulation processing according to the present embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Computer, 2 ... Signal input device, 3 ... Calculation processing part, 4 ... Bus, 5 ... Display device, 6 ... Storage device, 7 ... Two-dimensional position coordinate measuring means, 8 ... Position coordinate instructing means (transmission probe 9) Position coordinate designating means (simulating a receiving probe), 10 ... Rotational position measuring means, 11 ... Cable (for position signal), 12 ... Changeover switch, 13 ... Cable (for switch).

Claims (5)

[Claims] An ultrasonic flaw detection simulation apparatus for numerically calculating / displaying a propagation path and / or a sound pressure of an ultrasonic wave incident on a test object, a flaw detection surface of the test object or a flaw detection surface of the test object. An ultrasonic probe, comprising: a signal input device simulating an ultrasonic probe comprising means for measuring a current position coordinate on a surface simulating the above, and means for transmitting a signal representing the current position coordinate. Flaw detection simulation device. 2. A means for measuring a relative rotational position of the signal input device on a surface to be inspected of the inspection object or a surface simulating the inspection surface of the inspection object, and the rotational position. An ultrasonic flaw detection simulation device comprising a means for transmitting a signal. 3. The signal input device according to claim 2, wherein
An ultrasonic flaw detection simulation apparatus comprising: means for measuring dimensional position coordinates and rotational position, and transmitting a signal in synchronization with the measurement. 4. An ultrasonic flaw detection simulation apparatus as the signal input device, comprising means for setting a refraction angle, a frequency, and a propagation mode (longitudinal wave, transverse wave) used in ultrasonic flaw detection. 5. An ultrasonic flaw detection simulation device comprising two input devices simulating a transmission ultrasonic probe and a reception ultrasonic probe as the signal input device.