JPS59197855A - Ultrasonic flaw detector - Google Patents

Abstract

PURPOSE:To reduce remarkably the number of signal transmission cables by encoding a selecting signal for selecting plural ultrasonic probes by a binary notation, transmitting it, and connecting electrically only a selected probe to an ultrasonic flaw detector. CONSTITUTION:A number of an ultrasonic probe 4 to be operated is selected by an ultrasonic probe selecting switch 5. It is displayed by an indicator 7, confirmed by an inspector, and simultaneously, inputted to an ultrasonic probe selecting signal generator 6, and an ultrasonic probe selecting signal encoded by a binary notation is outputted. A pattern of a specified voltage state corresponding to each of the ultrasonic probe 4 to be selected exists, and it is transmitted to an ultrasonic probe selecting signal decoder 8 through an ultrasonic probe selecting signal transmission cable 10. This voltage pattern information is decoded and a relay in a relay circuit 9 connected with the corresponding ultrasonic probe is energized. Only the ultrasonic probe 4 connected to this relay makes a closed circuit with an ultrasonic flaw detector 3 installed at an operating unit 1 side.

Description

[Detailed Description of the Invention] [Technical Field of the Invention J] The present invention relates to an ultrasonic flaw detection device for inspecting welded parts of heavy equipment such as nuclear reactors and the internal conditions of their constituent materials, and in particular, to The present invention relates to an ultrasonic flaw detection device that operates a probe remotely, selects an arbitrary ultrasonic probe, and performs ultrasonic flaw detection using the selected ultrasonic probe.

[Technical Background of the Invention] Generally, an ultrasonic flaw detection device is composed of a pair of ultrasonic flaw detectors, an ultrasonic probe, and an ultrasonic flaw detection signal transmission cable, and an inspector places the ultrasonic probe on an object to be inspected. The ultrasonic probe transmits and receives ultrasonic waves from the ultrasonic probe to the object to be inspected, and changes in the received ultrasonic energy are converted into electrical signals. There is a method that determines the presence or absence of a defect in the object to be inspected by measuring the change in the shape of this waveform and the positional relationship between the ultrasonic probe and the object to be inspected.

In recent years, for example, in regular D31 inspections at nuclear power plants, etc., ultrasonic probes and ultrasonic flaw detectors are installed at a certain point and inspected remotely to prevent exposure to radiation. A method of performing ultrasonic flaw detection on objects is being used.

That is, a plurality of ultrasonic probes are installed near the object to be inspected, and the plurality of ultrasonic probes are sequentially driven by remote control. A detector for detecting the amount of drive indicating the relative position is set on the object to be inspected, and the drive amount signal indicating the relative amount of movement of the ultrasonic probe obtained by this detector and the amount of drive of the ultrasonic probe are The ultrasonic flaw detection signal obtained by the operation is taken out via a cable to an ultrasonic flaw detector installed at a location away from the object to be inspected, and the ultrasonic flaw detector and drive amount signal are analyzed by this ultrasonic flaw detector. This method performs ultrasonic flaw detection. In this case, in nuclear power plants and the like, there is an advantage that ultrasonic flaw detection can be performed on the object to be inspected in an atmosphere of emitted copper □ rays without the need for inspectors to approach it.

[Problem in the background art J] However, in the conventional remote control method described above, in order to transmit and receive ultrasonic flaw detection signals to and from a large number of ultrasonic probes, a signal equal to the number of ultrasonic probes is set in advance. If you run the ultrasonic flaw detection signal transmission cable from the object to be inspected to the remote control side, or if you use fewer ultrasonic flaw detection signal transmission cables than the number of ultrasonic probes, this ultrasonic flaw detection signal transmission There is no choice but to take the method of obtaining ultrasonic flaw detection No. 13 for all ultrasonic probes by sequentially replacing the connector provided on the end surface of the kasol on the side of the object to be inspected with the connector of the ultrasonic probe that performs ultrasonic flaw detection. Therefore, when using ultrasonic flaw detection signal transmission cables for all ultrasonic probes, it takes a lot of effort and time to install them when there are a large number of ultrasonic probes, and the cable end face In the method of replacing the connector and the ultrasonic probe connector, the inspector needs to go out to the side of the object to be inspected each time, which leads to an increase in the number of objects to be inspected at the inspection port and extremely high work efficiency. It had the disadvantage of being bad.

LObject of the Invention 1 The present invention has been made in response to such conventional circumstances,
When remotely controlling multiple ultrasonic probes, an ultrasonic flaw detection signal is used to connect the quick operation side of the ultrasonic probe to the multiple ultrasonic probes on the object to be inspected. The purpose of this study is to propose an ultrasonic flaw detector stirrup that can reduce the number of transmission cables, reduce the radiation exposure of inspectors, and improve work efficiency.

[Summary of the Invention J In other words, the present invention comprises a plurality of ultrasonic probes that are installed near an object to be inspected and transmit and receive ultrasonic flaw detection signals to and from the object to detect the condition of the object to be inspected. , an ultrasonic flaw detector that transmits and receives the ultrasonic flaw detection signal to and receives the ultrasonic flaw detection signal to display the state of the object to be inspected, and an arbitrary ultrasonic flaw detector among the plurality of ultrasonic probes. Ultrasonic probe selection (operation that generates M number) encoded in a binary system that selects a probe, and this operation U chive 6C generates an ultrasound probe selection signal that selects an ultrasound probe. an ultrasonic probe selection unit that selects and electrically connects only the selected ultrasonic probe to the ultrasonic flaw detector; and an ultrasonic probe selection unit that selects and electrically connects only the selected ultrasonic probe to the ultrasonic flaw detector; The present invention is an ultrasonic flaw detection apparatus characterized by having an ultrasonic probe selection signal transmission means for transmitting a probe selection signal.

[Embodiment of the Invention] Hereinafter, one embodiment of the present invention will be described without showing the details of the present invention in the drawings.

The figure is a block diagram showing an embodiment of an ultrasonic flaw detection apparatus according to the present invention. In the figure, C 1 is an operation unit for selecting and covering an arbitrary ultrasonic probe 4 from a plurality of ultrasonic probes 4 for ultrasonic flaw detection of the state of the object 12 to be inspected. 1 is selected by an ultrasonic probe selection switch 5 for selecting an arbitrary ultrasonic probe 4 from the plurality of ultrasonic probes, and this ultrasonic probe selection switch 5. A display 7 for displaying a numerical value corresponding to the ultrasonic probe 4, that is, a number selected from the serial numbers assigned to the ultrasonic probe 4 in advance, and a display 7 for displaying a number corresponding to the ultrasonic probe 4; An ultrasonic probe selection signal generator 6 encodes the number of the ultrasonic probe 4 selected by 5 using a binary system and generates parallel ultrasonic probe selection signals.
It consists of.

Further, an ultrasonic probe selection unit 2 that selects an ultrasonic probe 4 based on an ultrasonic probe selection signal generated by the operation unit 1 is installed near the object to be inspected 12, and is connected to the object to be inspected 12. F! slides on the inspection surface of the object to be inspected 12 by a drive mechanism (not shown) equipped with a detector that detects the drive m that indicates the relative position with the ultrasonic probe 4. A relay circuit 9 having a plurality of relays connected to each of the ultrasonic probes 4 via a cable, and an ultrasonic probe selection signal generator of the operation unit 1. The ultrasonic probe iTE receives the binary coded ultrasonic probe iTE selection signal generated from 6 via the ultrasonic probe selection signal transmission cable 10, and decodes this ultrasonic probe selection signal. The selected ultrasonic probe 4 and the ultrasonic flaw detector 3 are electrically connected by connecting with the ultrasonic probe corresponding to the probe selection signal and energizing a specific relay in the relay circuit 9. and an ultrasonic probe selection signal decoder 8 which generates a signal connected to the ultrasonic probe selection signal decoder 8.

The ultrasonic probe 4 and the ultrasonic probe selection units 1 to 2 are located on the side of the object to be inspected 12. For example, a nuclear power plant C is located in a copper wire atmosphere, but the operating unit 1 and The ultrasonic flaw detector 3 (for inspection away from the side object 12 to be inspected) is installed in a suitable environment.

Furthermore, in addition to the aforementioned 7j ultrasonic probe selection signal transmission cable 10, one ultrasonic flaw detection signal transmission cable is connected between this operation unit 1 and the ultrasonic probe selection unit 2 on the side of the object to be inspected 12. A cable is wired, and the end of the ultrasonic flaw detection signal transmission cable 11 on the operation side 1 to 1 transmits and receives ultrasonic flaw detection signals to the ultrasonic probe 4, and detects changes in the received ultrasonic energy. An ultrasonic flaw detector 3 is connected to the other end of the ultrasonic flaw detection signal transmission cable 11, which converts it into an electrical signal and displays an ultrasonic image of the state of the object to be inspected 12 on an old CRI. The side is connected to relay C in the relay circuit 9.

Next, the operation of this embodiment will be explained.

First, the number of the ultrasonic probe 4 that is not to be operated is selected using the ultrasonic probe selection switch 5. The number selected by the ultrasonic probe selection switch 5 is displayed on the display 7, and upon confirmation by the inspector, a signal corresponding to this number is input to the ultrasonic probe selection signal generator 6. , this ultrasonic probe selection signal generator 6 outputs an ultrasonic probe selection number G4 encoded by a binary method. Since this ultrasonic probe selection number 45 is encoded using a binary system, in order to specify, for example, 16 ultrasonic probes 4, four selection signal transmission cables 10 are prepared, and the four selection signal transmission cables 10 are prepared.
Tree selection signal transmission - for each of the pulls 10 - UHiG
A combination of voltage states of H level, t, and 110 W level is transmitted.

That is, there is a specific voltage state pattern corresponding to each of the ultrasound probes 4 to be selected, and this voltage state pattern is used by the ultrasound probe selection signal generator 6 to select the ultrasound probe ( The ultrasonic probe selection signal decoder 8 is transmitted to the ultrasonic probe selection signal decoder 8 through the No. g transmission cable 10 (!-bond). When a signal is input manually, this voltage pattern information is decoded, and a signal is output that excites the relay in the relay circuit 9 connected to the ultrasonic probe corresponding to this voltage pattern information.

In this way, a specific selected relay in the relay circuit 9 is energized, and the ultrasound probe 4 connected to this relay is energized.
A closed circuit is formed with the ultrasonic flaw detector 3 installed on the operation unit 1 side.

As a result, while following the basic ultrasonic flaw detection method of one ultrasonic flaw detector and one ultrasonic flaw detection signal transmission cable* for one ultrasonic probe, the ultrasonic flaw detection of a large number of ultrasonic probes 4 was performed. It is possible to receive signals. Moreover, the circuit between the ultrasonic probe 4 other than the ultrasonic probe 4 selected at this time and the ultrasonic flaw detector 3 is maintained in an open state.

In this example, the -C cable was used as the ultrasonic probe selection signal transmission means, but the ultrasonic probe could also be transmitted using optical communication technology using -C laser light, etc. It is also possible to transmit the child selection signal C, and in this case, there is an advantage that the Couple I stage process is not necessary.

[Effects of the Invention] As described above, in the ultrasonic flaw detection device according to the present invention, the ultrasonic probe selection No. 43 for selecting a plurality of ultrasonic probes is converted into No. 79 using a binary system and transmitted. This ultrasonic probe selection signal selects an arbitrary ultrasonic probe (R) and only the selected ultrasonic probe is electrically connected to the ultrasonic flaw detector. The number of signal transmission loops connecting the remote control side that operates the probe and the large number of ultrasonic probes on the object to be inspected can be significantly reduced.

In particular, the reduction in the number of ultrasonic probe selection signal transmission cables is significant. For example, in order to select one specific ultrasound probe from 16 ultrasound probes, you only need to prepare 4 ultrasound probe selection signal transmission cables, and 3
In the case of 2 ultrasonic probes, it is sufficient to prepare 5 pieces of ultrasonic probe selection signal transmission cables, and in the case of 64 pieces of ultrasonic probes, 6 pieces of ultrasonic probe selection signal transmission cables need to be prepared. It is possible to significantly reduce the number of probe selection signal transmission cables.

In this way, the number of ultrasonic probe selection signal transmission cables can be reduced, so multiple ultrasonic probes can be used to select an arbitrary ultrasonic wave from among the multiple ultrasonic probes. In order to realize the advantage of ultrasonic flaw detection using remote control, which allows you to select the probe and easily obtain the necessary ultrasonic flaw detection signals, the process of attaching a cable from the object to be inspected to the operation unit side is greatly reduced. This has the advantage of being configurable.

This will lead to a significant reduction in radiation exposure, especially when applied to inspections inside nuclear power plants, and will also improve work efficiency, with effects that are significant for humans.

[Brief explanation of the drawing]

The figure shows the configuration of the ultrasonic flaw detection device according to the present invention.
This is a diagram. 1.........Operation unit 2...
......Ultrasonic probe selection unit 3...
......Ultrasonic flaw detector 4...
・Ultrasonic probe 5・・・・・・・・・Ultrasonic probe selection switch 6・・・・・・・・・Ultrasonic probe selection signal generator 7・...... Display unit 8 ...... Ultrasonic probe selection signal decoder 9 ...... Relay circuit 10 ...
......Ultrasonic probe selection signal transmission cable 11......Ultrasonic flaw detection signal transmission cable 12... Kensuke Nori Chika, patent attorney representing the object to be inspected (one person)

Claims (1)

[Claims] <1) A plurality of ultrasonic probes that are installed near an object to be inspected and transmit and receive ultrasonic flaw detection signals to and from the object to detect the state of the object to be inspected; an ultrasonic flaw detector that transmits and receives the ultrasonic flaw detection signal to a sonic probe and displays the state of the object to be inspected, and selects an arbitrary ultrasonic probe from the plurality of ultrasonic probes; an operating unit 1 for generating an ultrasonic probe selection signal encoded in a binary system;
This operation unit] - An ultrasonic probe that selects an ultrasonic probe based on the generated ultrasonic probe selection signal and electrically connects only the selected ultrasonic probe to the ultrasonic flaw detector. an ultrasonic probe selection signal transmission means for transmitting an ultrasonic probe selection signal generated by the operation unit to the ultrasonic probe selection unit; Sonic flaw detection equipment. (2) The ultrasonic flaw detection apparatus according to claim 1, wherein the ultrasonic probe selection signal transmission means is a cable. (3) The operation unit includes an ultrasonic probe selection switch that selects an arbitrary ultrasonic probe, and a display that displays the ultrasonic probe selected by this ultrasonic probe selection switch. and an if!1 sonic probe selection signal generator that generates an ultrasound probe selection signal corresponding to the ultrasound probe selected by the ultrasound probe selection switch. The ultrasonic flaw detection device according to item 1 or item 2. an ultrasonic probe selection signal decoder that generates an output signal for electrically connecting an ultrasonic probe corresponding to the ultrasonic flaw detector to the ultrasonic flaw detector; The ultrasonic flaw detection apparatus according to claim 1 or 2, further comprising a switch that electrically connects an ultrasonic probe corresponding to a probe selection signal to the ultrasonic flaw detector. ) The ultrasonic flaw detection device according to claim 4, wherein the switch is a relay circuit.