KR20130038974A - Non-destructive test equipment system - Google Patents

Abstract

PURPOSE: A nondestructive testing system is provided to easily grasp the existence of defects of a target object as data which is converted into various forms by using the data of reflected waves reflected by the defects of the target object is generated in a microprocessor and displayed. CONSTITUTION: A nondestructive testing system comprises a water reservoir(10), a robot(20), an ultrasonic system(30), and a microprocessor. The water reservoir is composed of a flooding tank(11) and an inspection table. The robot is composed of a Y-axis transferring unit, an X-axis transferring unit, and a Z-axis servo motor. The ultrasonic system is composed of a signal generating unit and a probe. The microprocessor is composed of a robot control unit, an ultrasound generation control unit, a reflected wave reception and defect determination unit, and a scan data generating unit.

Description

Non-destructive Test Equipment System

The present invention relates to a non-destructive inspection equipment system, and more particularly, by precisely adjusting the position by using the transfer unit to transmit ultrasonic waves to the inspection site of the inspection target part and receive and scan the reflected wave reflected by the defect formed in the inspection site The present invention provides a non-destructive inspection equipment system that can easily inspect a part's condition without destroying the part by generating and displaying data.

The technology of inspecting products in the parts production line is largely classified into destructive inspection method and non-destructive inspection method. Among them, the destructive method is a method for monitoring a process by sampling, and a general inspection is performed in real time offline, while the non-destructive inspection method is mainly used to determine whether a product is defective or not. Perform a full inspection. In addition to Korea, many countries around the world, through free trade agreements (FTAs), are in direct competition with each other. The demand for technology for non-destructive full-scale inspection of parts materials online is also increasing.

In general, the fracture inspection, which is conventionally performed on welded metal materials, separates by applying a physical force to two joined materials, and performs a separation test that estimates the welding state by the force required for the separation. There was also a lot of trouble. In addition, in the case of such a destruction test, since the selected sample is destroyed during the inspection process, there is a problem in that an economic loss occurs as the product selected for inspection is discarded after the inspection and the inspection is performed.

In addition, the non-destructive inspection equipment system conventionally applied to the internal inspection of the human body, civil engineering, or building equipment has a problem that it is difficult for a non-expert to satisfy the experimental conditions such as the angle and distance of the probe and the inspection object. As a result of the inspection results, it is difficult to be used in many small and medium-sized companies because a separate data decryption ability is required to determine whether there is a defect in the inspection object.

In addition, since the inspection is performed manually, the inspection results may vary depending on the fatigue of the inspector, which may cause a problem in reliability, and it is difficult to inspect a large area more precisely than the ultrasonic probe, and the inspector is located (high or narrow in place). Areas that are difficult to access or dangerous by the inspector) are difficult to inspect, so the reliability of the test results is not reliable and only the simple test is possible, and the analysis is performed by the inspector's judgment, making it difficult to store and follow up the analysis results. There was a problem.

The present invention has been made in order to solve the above problems, the ultrasonic system for transmitting the ultrasonic wave is controlled by the transfer unit which is movable in the front and rear, left and right within a very small range, the angle of the probe and the inspection object is adjusted, and up and down The present invention provides a non-destructive inspection equipment system that allows the non-expert to easily satisfy the experimental conditions by adjusting the distance between the probe and the inspection object to the servo motor which is movable within the minimum range.

Another object of the present invention, after the microprocessor connected to the probe is sent to the inspection object, the reflection from the defect inside the inspection object receives the reflected wave of the ultrasonic wave to determine the presence of the defect and the reflected wave is converted into various types of data to be expressed In addition, the present invention provides an inspection apparatus using ultrasonic waves that can automatically identify the presence of defects.

It is still another object of the present invention to transmit an ultrasonic wave therein without forcing separation of an inspection object and to receive the reflected wave to determine whether the inspection object is defective, and to inspect the presence of defects in the welding spot safely and quickly. In addition, the present invention provides an inspection apparatus using ultrasonic waves, which can reduce a disposal cost of a product which has been generated due to the conventional destruction inspection.

According to an aspect of the present invention for achieving the above object, the sump tank consisting of a fluid-filled immersion tank in which a certain amount of water is stored, and a test table installed in the fluid-filled immersion tank so that the test object is placed, the collection tank Y-axis feeder coupled to both edges to move back and forth, X-axis feeder coupled to the left and right while connecting the Y-axis feeder, and Z-axis servo motor coupled to the X-axis feeder to move up and down And an ultrasonic system coupled to the Z-axis servo motor and moving together with the robot, the signal generator being an acoustic source for generating ultrasonic waves, and a probe for sending ultrasonic waves generated from the signal generator to an inspection target and driving of the robot. Set the robot controller to control the frequency of the ultrasonic wave generated by the signal generator and For example, the ultrasonic wave generation control unit, a reflection wave reception and defect determination unit for determining the presence or absence of a defect by receiving the magnitude and duration of the reflected wave reflected from the inspection object, and the first scanning, the second scanning, and the third by the reflected wave data. It provides a non-destructive inspection equipment system, characterized in that it comprises a microprocessor consisting of a scan data generation unit programmed to generate scanning data.

The microprocessor may further include a distance amplitude compensation circuit for compensating the size of the reflected wave according to the depth of the inspection object by the traveling time of the reflected wave.

In addition, the reflection wave reception and defect determination unit preferably has an I gate for removing noise generated on the surface to be inspected, and an A gate serving as a measure for determining the amount of the reflected wave for determining a defect.

In addition, the scan data generator may be programmed to implement the second scanning data into a three-dimensional image.

The robot may be controlled by the robot controller to move the robot to an initial position of an inspection part of the object to be inspected to be displayed on the automatic inspection and the scan data generation unit.

According to the present invention as described above, the ultrasonic system is easily moved back and forth, left and right and up and down by a robot consisting of a precisely movable transfer unit and a servo motor, so that the angle and distance between the probe and the inspection target can be easily adjusted. It works.

Another effect of the present invention is that by converting the data converted into various forms using the reflected wave data reflected from the defect of the inspection object, the microprocessor generates and expresses the data, so that an ordinary operator without ultrasonic decoding ability can easily detect the defect of the inspection object. It can be understood.

Another effect of the present invention, because it is possible to inspect the presence of welding spots without separating the inspection object, it is possible to inspect the presence of defects safely and quickly and significantly reduce the loss caused by the disposal of the product after the conventional inspection In addition, there is an effect that can be applied to the entire inspection.

1 is a front view of a non-destructive inspection equipment system according to the present invention.
Figure 2 is a block diagram showing the internal configuration of a robot according to the present invention.
3 is a block diagram illustrating an internal configuration of a microprocessor according to the present invention.
Figure 4 is a block diagram showing a process of performing a non-destructive inspection in accordance with the present invention.
5 is a block diagram showing first scanning data generated by performing a non-destructive test according to the present invention.
Figure 6 is a block diagram showing the third scanning data generated by performing a non-destructive inspection and the second scanning data produced in three dimensions in accordance with the present invention.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As illustrated in FIG. 1, the non-destructive inspection equipment system according to the present invention may be coupled to an upper portion of the water collecting tank 10 on which the inspection object is placed and the water collecting tank 10 may move in three directions of X, Y, and Z axes on the water collecting tank. A robot 20, an ultrasonic system 30 coupled to the robot 20 to transmit ultrasonic waves to the inspection object, and a reflected wave reflected by a defect formed in the inspection object by the ultrasonic waves transmitted from the ultrasonic system 30. It includes a microprocessor for receiving data to determine the presence or absence of a defect of the inspection object, a monitor for displaying the test results generated by the microprocessor, and input means for inputting instructions to the microprocessor.

The sump (10) is a fluid-filled immersion tank (11) in which a certain amount of water is stored, the inspection table installed in the fluid-filled immersion tank so that the vehicle parts to be inspected, and the position of the vehicle parts placed on the inspection table It is composed of a transparent sump tank 12 formed on one surface of the fluid-filled submerged tank so that the operator can confirm from the outside, a water supply means for supplying water to the sump tank, and a drain valve 13 for discharging the water in the sump tank .

In this case, the inspection table may be configured to be variously configured such that the height and size of the inspection tank to inspect the various parts of the car, and also to facilitate the operator's convenience, the movement of the wheel, etc. in the lower part of the sump Means are preferably configured to be able to move the sump according to the convenience of the operator.

2 is a block diagram showing the internal configuration of a robot according to the present invention, Figure 3 is a block diagram showing the internal configuration of a microprocessor according to the present invention.

The robot 20 has a Y-axis feeder 21 coupled to both edges of the water tank so that the ultrasonic system 30 to be described later can be moved back and forth in the upper portion of the water tank, and can move left and right in the upper portion of the Y-axis feeder. An X-axis feeder 22 coupled while connecting the two Y-axis feeders 21 and a Z-axis feeder 23 coupled to one surface of the X-axis feeder 22 to move up and down on the X-axis feeder. It consists of. As described above, the ultrasonic system 30 moves vertically above the inspection object placed on the inspection table in the collection tank by the robot 20 forming the perpendicular coordinate system.

The Y-axis feeder 21 is composed of two feeders respectively coupled to the side rim of the upper portion of the sump tank 10 and adjustable up to 1/1000 mm, but not shown in detail, a ball retainer (Ball) installed at one side of the feeder Retainer type LM guide, the trailing chain (Trailing Chain) connected to the other side of the transfer unit, and the position information of the ultrasonic system 30 moving back and forth on the Y-axis transfer unit can exchange the robot control unit of the microprocessor It is configured to include a linear encoder.

At this time, the coupling member to which the X-axis transfer unit 22 is coupled to the upper part of the trailing chain is connected, and the entire X-axis transfer unit moves back and forth together with the trailing chain moving back and forth by driving the transfer unit.

Although not shown in detail, the X-axis conveying part 22 is composed of one conveying part connected to each of the coupling members connected to the trailing chain of the Y-axis conveying part and adjustable up to 1/1000 mm, and is provided on one side of the conveying part. A retainer type LM guide, a trailing chain connected to the other side of the transfer unit, and a linear encoder capable of exchanging position information of the ultrasonic system 30 moving left and right on the X-axis transfer unit with the robot controller of the microprocessor. It is configured by.

The Z-axis servo motor 23 is configured as a servo motor connected to the X-axis feeder 22 and movable up and down.

As described above, the ultrasonic system 30 moves back and forth and left and right on the water collection tank 10 while adjusting the position of the probe 32 and the inspection object by adjusting the X-axis and Y-axis feeder. The ultrasonic system 30 moves up and down by the electric motor 23 to adjust the distance between the probe 32 and the inspection object placed on the inspection table in the collection tank, and then transmit ultrasonic waves to the inspection object.

The ultrasonic system 30 is connected to the Z-axis servo motor 23 and moves together by the movement of the robot, and a signal generator which is an acoustic source for generating ultrasonic waves having a frequency set by an operator ( 31) and a probe 32 (Probe) for sending the ultrasonic wave generated by the signal generator 31 to the inspection object.

Ultrasonic waves generated by the signal generator 31 are sound waves exceeding a range of an audible frequency, and may be selectively generated in a range of 20 Hz to 1 Hz according to an inspection object. In this embodiment, ultrasonic waves having a frequency of about 10 MHz are generated to inspect the welded parts of the automobile parts.

The probe 32 is in contact with the inspection object and transmits the ultrasonic waves generated by the signal generator 31, detects the sound waves reflected from the defects generated inside the inspection object and transmits them to the microprocessor to be described later.

The microprocessor 40 is connected to the robot and the input means to be described later to move the robot up and down (Z axis), left and right (X axis), front and rear (Y axis) by the data input by the operator. And the robot controller 41 for controlling the driving of the X-axis, Y-axis feeder and Z-axis servo motor, and the signal generator 31 and the input means to generate ultrasonic waves of a frequency selected by the operator to suit the inspection object. An ultrasonic wave generation control unit 42 connected to control an operation of the signal generation unit, and an amplitude (AMP; Amplitude) which is an amount of energy of the reflected wave returned from the discontinuous portion, which is transmitted to the inside of the inspection object and is a defect existing therein; A reflected wave reception and defect determination unit 43 including a comparator for receiving a time of flight (TOF) and the like through the probe 32 and comparing the magnitude and the set value of the reflected wave to determine whether there is a defect; , remind Lobe 32, a first scanning by the information of the reflected wave received by, the second consists of the scanning, the scanned data generator 44 programmed to generate the third scanning data.

In this case, when the defects present in the inspection object exist at the same position, the larger the defect, the greater the value of the reflected wave, and when the defects of the same size exist at different positions inside the inspection object, the deeper the depth where the defect is located, the reflected wave The value of becomes small. Therefore, the same amplitude of the defects show different values according to their positions. For accurate determination, the depth of the inspection object is determined by the propagation time of the reflected wave, and then a distance amplitude compensation circuit (DAC) is provided to compensate for the reflected wave size. Distance Amplitude Compensation) is preferably further included.

In addition, the gate may be set to limit the area inspected by the reflected wave reception and defect determination unit 43 to be used for a predetermined period. In other words, it sets the I Gate (Interface Gate) to remove the noise generated when the surface is not smooth, and determines the amount of defect to be judged as a defect when receiving the reflected wave for the defect. And setting the A gate capable of measuring thickness so as to determine a defect when a value higher than the A gate is entered, and discarding the value when a value lower than the A gate is entered so as not to recognize the defect.

The scan data generation unit 44 first uses the information on the magnitude AMP and the travel time TOF of the reflected wave on the time axis to reflect the magnitude of the sound wave reflected from the defect generated inside the automobile part to be inspected during welding. Each of the received one-dimensional scanning data is generated, second scanning data is generated by imaging the cross section inside the inspection object, and the probe is moved by a predetermined interval while moving the position determined to be defective. After the reflected signal is stored in the memory, it is processed comprehensively to generate third scanning data of the 3D image.

The monitor displays the various scan data generated by the scan data generation unit and the presence or absence of defects determined by the reflected wave reception and defect determination unit by using the magnitude and duration of the reflected wave reflected from the inspection object. It is configured to be connected to the microprocessor to understand the contents.

The input means may move the robot to the X-axis, the Y-axis, the Z-axis, or select a frequency of the ultrasonic wave to be generated by the signal generator, such as a keyboard to input information desired by an operator to the robot and the microprocessor. It consists of a mouse or a joy stick.

Next will be described the operation of the non-destructive inspection equipment system according to the present invention configured as described above.

First, after filling a certain amount of water in the water collecting tank 10 and placing the car parts to be inspected on the inspection table, the operator moves the robot 20 so that the probe 32 is placed on the upper part perpendicular to the inspection object by operating the input means. At this time, the robot controller of the microprocessor drives the Y-axis feeder and the X-axis feeder to move the trailing chain so that the probe 32 is placed on the test object so that the angle between the probe and the test object is adjusted to within 1 °. The axis servo motor is driven so that the probe is placed on the upper surface of the inspection object to adjust the distance between the probe and the inspection object.

After the probe 32 is placed on the vertical portion of the inspection object, an ultrasonic wave set to 10 MHz is generated by the signal generator 31 of the ultrasonic system by a control signal of an ultrasonic wave generation controller of the microprocessor, and then the ultrasonic wave is generated by the probe ( 32) and transmitted to the inside of the automotive part under test.

The ultrasonic wave transmitted as described above is reflected by the discontinuous part, which is a defect formed in the automobile part, during welding, and returns to the probe 32. At this time, the probe 32 receives the magnitude AMP and the time TOF of the reflected echo Echo, which are reflected ultrasonic waves, and transmits them to the reflected wave reception and defect determination unit of the microprocessor. At this time, the magnitude of the reflected wave is transmitted after the value is compensated by the distance amplitude compensation circuit provided in the microprocessor.

In the comparator of the reflected wave receiving and defect determining unit, a predetermined value of the A gate is compared with the size of the reflected wave to determine that the reflected wave is larger than the A gate.

At this time, the information on the size, the running time and the presence of defects of the reflected wave received and determined by the reflected wave receiving and defect determining unit is converted into scan data that is easy for the operator to see in the scan data generating unit.

That is, the first scanning data displaying the magnitude of the reflected wave on the time axis is generated by a program included in the scan data generating unit, and the second scanning data is generated by imaging the cross section inside the inspection object by the user's selection. The probe 32 is moved at regular intervals, and each received wave is stored in a memory to generate third scanning data of a 3D image. In addition, the second scanning data may be embodied and displayed in a three-dimensional image by a three-dimensional measuring program so that an operator can more easily grasp information on the size of the defect.

As such, the scan data generated by the scan data generation unit, the reflected wave related data received by the reflected wave reception and defect determination unit, and a result of determining whether there is a defect are transmitted to the monitor connected to the microprocessor and displayed. Such data may be stored in a separate memory or may be connected to a printer and output.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it is possible to make various modifications and variations without departing from the spirit and scope of the invention. Accordingly, the scope of the appended claims should include all such modifications and changes as fall within the scope of the present invention.

10: sump tank 11: fluid-filled immersion tank
12: sump tank 13: drain valve
20: robot 21: Y axis transfer unit
22: X-axis feeder 23: Z-axis feeder
30: ultrasonic system 31: signal generator 32: probe 40: microprocessor
41: robot control unit 42: ultrasonic generation control unit
43: reflected wave receiving and defect determination unit
44: scan data generation unit

Claims (5)

A water collecting tank comprising a fluid-filled immersion tank in which water is stored in a predetermined amount, and an inspection table installed in the fluid-filled immersion tank so that the inspection object is placed;
Y-axis feeder coupled to both edges of the sump and moved forward and backward, X-axis feeder coupled to the left and right while connecting the Y-axis feeder, and Z-axis servo motor coupled to the X-axis feeder and moved up and down Robot consisting of;
An ultrasonic system coupled to the Z-axis servo motor and moving together with the robot, the ultrasonic wave generator including a signal generator which is an acoustic source for generating ultrasonic waves, and a probe which sends ultrasonic waves generated by the signal generator to an inspection object; And
A robot control unit for controlling the driving of the robot, an ultrasonic wave generation control unit for setting and controlling the frequency of the ultrasonic wave generated by the signal generator, and receiving the magnitude and the duration of the reflected wave reflected from the inspection object to determine whether there is a defect And a microprocessor comprising a reflected wave receiving and defect determining unit and a scan data generating unit programmed to generate first scanning, second scanning, and third scanning data based on the reflected wave data. system.
The method of claim 1,
And the microprocessor further comprises a distance amplitude compensation circuit for compensating the magnitude of the reflected wave according to the depth of the inspection object by the traveling time of the reflected wave.
The method of claim 1,
The non-destructive inspection equipment system is characterized in that the reflection reception and defect determination unit is set to the I gate for removing the noise generated from the surface to be inspected, and the A gate to determine the amount of the reflected wave to determine the defect .
The method of claim 1,
The scan data generating unit is programmed to implement the second scanning data in a three-dimensional image system, characterized in that non-destructive inspection.
5. The method of claim 4,
Non-destructive inspection equipment system characterized in that the robot moved to the initial position of the inspection site of the subject to be inspected by the robot control unit to be displayed on the automatic inspection and the scan data generation unit.

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