KR102226458B1 - System and method of monitoring device in nuclear power plant - Google Patents

Abstract

A wireless data communication system for monitoring a nuclear power plant system device according to the present invention is provided. The wireless data communication system includes a camera for transmitting a camera vertical synchronization frame signal; A processor attached to the nuclear power plant system device and operating a sensor based on a period of the vertical synchronization frame signal to obtain state information of the nuclear power plant system device; And an LED matrix indicating data related to the status information and parity for the data, and wireless data on the status information of the nuclear power plant can be obtained in an environment in which the use of electromagnetic waves is limited.

Description

A wireless data communication system that monitors nuclear power plant equipment and its method TECHNICAL FIELD [SYSTEM AND METHOD OF MONITORING DEVICE IN NUCLEAR POWER PLANT}

The present invention relates to a wireless data communication system and method for monitoring a nuclear power plant system. More specifically, it relates to a wireless data communication system and method using a light emitting diode array and a camera synchronization signal.

The nuclear power plant system equipment of a nuclear power plant needs detection of malfunction or abnormal vibration or shock. For this, a wireless monitoring method for the equipment of nuclear power plants of nuclear power plants is needed.

However, the wireless monitoring method for such a nuclear power plant system has a problem in the following points. When the wireless monitoring method for nuclear power plant system equipment is used as described above, EMI/RFI problems may occur in the case of nuclear power plant safety system equipment.

In addition, since the wireless monitoring method for such a nuclear power plant system uses a dedicated receiver, there is a problem in that it is difficult to always inspect by the naked eye.

On the other hand, in relation to the nuclear power plant system equipment of a nuclear power plant, prior literature on monitoring pipes or valves from a distance in consideration of abnormal vibration or impact detection on pipes, etc. is as follows. First, Korean Patent Registration No. 10-1415859, “Device and method for radioactivity detection” proposes a camera, an infrared camera, and a pixel image detector that rotate horizontally or vertically until the maximum flux is determined. In addition, if the counts of events measured by the detector or the subject is determined to be dangerous, an alarm is initiated by notifying the network recognition layer of the relevant information, and the acquired images suggest that the movement of objects is contained or displayed in the view of the camera. do.

However, such a detection method is for radioactivity detection, and has a distinction between detecting abnormal vibration or shock for a nuclear power plant system as described herein. In addition, there is a problem in that the camera simply suggests that the movement of objects is determined by the camera, and the camera cannot respond by acquiring prior information about which valve or pipe is abnormal.

Korean Patent Registration No. 10-1415859

An object of the present specification is to provide a wireless data communication system and method using a light emitting diode array and a camera synchronization signal.

In addition, it is an object of the present invention to provide a wireless data communication system and method whether a camera can acquire advance information about whether there is an abnormality in any device or pipe in a nuclear power plant system and photograph the device or pipe. There is a purpose.

The subject of the present invention is not limited to the problems mentioned above, and other problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, a wireless data communication system for monitoring a nuclear power plant system device according to the present invention is provided. The wireless data communication system includes a camera for transmitting a camera vertical synchronization frame signal; A processor attached to the nuclear power plant system device and operating a sensor based on a period of the vertical synchronization frame signal to obtain state information of the nuclear power plant system device; And an LED matrix indicating data related to the status information and parity for the data, and wireless data on the status information of the nuclear power plant can be obtained in an environment in which the use of electromagnetic waves is limited.

Meanwhile, a wireless data communication method for monitoring a nuclear power plant system according to another aspect of the present invention is provided. The wireless data communication method includes: transmitting a vertical synchronization frame signal for transmitting a camera vertical synchronization frame signal through a camera; A nuclear power plant system device status information acquisition process attached to the nuclear power plant system device and operating a sensor based on a period of the vertical synchronization frame signal to obtain state information of the nuclear power plant system device; And a status information display process of displaying data related to the status information and parity for the data through an LED matrix.

According to an embodiment of the present invention, one or more of the following effects are provided.

According to at least one embodiment of the present invention, there is an advantage in that wireless data on state information of a nuclear power plant system can be obtained in an environment in which the use of electromagnetic waves is limited.

In addition, according to at least one embodiment of the present invention, the operation time of the LED matrix, which occupies a significant portion of the power consumption of the battery-operated transmission unit, can be significantly reduced and can be used for a long time, thereby extending the operating life of the nuclear power plant system monitoring system. There is an advantage that there is.

According to at least one embodiment of the present invention, when an optical signal of a predetermined period is incident on the sensor unit through a portable device, etc., the operation state of the LED matrix can be seen with the naked eye, and it is possible to determine the presence or absence of an abnormality in the system to be diagnosed. There is this.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 shows a detailed configuration of a wireless data communication system for monitoring a nuclear power plant system device according to the present invention.
2A is a conceptual diagram showing a principle of transmitting a camera vertical synchronization signal in a wireless data communication system according to the present invention.
2B shows the relationship between vertical video synchronization and horizontal synchronization in a wireless data communication system according to the present invention.
3 shows a low-power operation state diagram according to a wireless data communication system and method for monitoring a nuclear power plant system according to the present invention.
4 shows a structure of an LED array capable of displaying data related to state information of a nuclear power plant system and a parity of the data according to the present invention.
5 is a flowchart of a wireless data communication method for monitoring a nuclear power plant system according to the present invention.

It should be noted that the technical terms used in the present specification are only used to describe specific embodiments, and are not intended to limit the present invention. In addition, the technical terms used in the present specification should be interpreted as generally understood by those of ordinary skill in the technical field to which the present invention belongs, unless otherwise defined in this specification, and is excessively comprehensive. It should not be construed as a human meaning or an excessively reduced meaning. In addition, when a technical term used in the present specification is an incorrect technical term that does not accurately express the spirit of the present invention, it will be replaced with a technical term that can be correctly understood by those skilled in the art to be understood. In addition, general terms used in the present invention should be interpreted as defined in the dictionary or according to the context before and after, and should not be interpreted as an excessively reduced meaning.

In addition, a singular expression used in the present specification includes a plurality of expressions unless the context clearly indicates otherwise. In the present application, terms such as “consisting of” or “comprising” should not be construed as necessarily including all of the various elements or various steps described in the specification, and some of the elements or some steps It may not be included, or it should be interpreted that it may further include additional components or steps.

In addition, terms including ordinal numbers such as first and second used in the present specification may be used to describe various components, but the components should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present invention, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the same or similar components are assigned the same reference numerals regardless of the reference numerals, and redundant descriptions thereof will be omitted.

In addition, in describing the present invention, when it is determined that a detailed description of a related known technology may obscure the subject matter of the present invention, a detailed description thereof will be omitted. In addition, it should be noted that the accompanying drawings are only for easily understanding the spirit of the present invention and should not be construed as limiting the spirit of the present invention by the accompanying drawings.

Meanwhile, a wireless data communication system for monitoring a nuclear power plant system according to the present invention, and more particularly, a wireless data communication system and method using a light emitting diode array and a synchronization signal of a camera are as follows.

-As one of the wireless communication methods using visible light in an environment where the use of electromagnetic waves is difficult, it can be applied to the monitoring system of nuclear power plants.

-It has the advantage of being able to roughly determine even with the naked eye while transmitting sensor data wirelessly.

-Data can be transmitted according to the frame synchronization signal of the camera, specifically a vertical synchronization signal.

-As data frame rate = camera frame rate, synchronization of the monitoring system for nuclear power plant equipment can be performed without a separate synchronization device.

-The receiver can transmit the frame classification signal of the camera using a laser or infrared light.

-Data can be transmitted through the 2D LED array according to the frame signal in the transmitter.

-With a low power design, the system for monitoring nuclear power plant equipment can be operated for a long time with more than 5 years of battery use.

-It is possible to extract transmission errors and hardware errors with the LED array with 2D parity.

Meanwhile, FIG. 1 shows a detailed configuration of a wireless data communication system for monitoring a nuclear power plant system device according to the present invention. Referring to FIG. 1, a wireless data communication system includes a camera 110, a photodiode 120, a processor 130, and an LED matrix 140.

Here, the camera 110 is configured to transmit a camera vertical synchronization frame signal. Specifically, the camera 110 may transmit the vertical synchronization frame signal toward the photodiode 120 through the laser 111. In this case, when the photodiode 120 receives the vertical synchronization frame signal, the processor 130 may operate a sensor provided therein or connected to enable communication with each other.

Meanwhile, FIG. 2A is a conceptual diagram showing a principle of transmitting a camera vertical synchronization signal in a wireless data communication system according to the present invention. In this regard, FIG. 2B shows a relationship between vertical video synchronization and horizontal synchronization in a wireless data communication system according to the present invention.

2A and 2B, a plurality of vertical synchronization frame signals may be transmitted within a video frame within a vertical blanking interval. Meanwhile, a plurality of horizontal blanking intervals may be included in any one of the intervals other than the vertical blanking interval. In addition, a horizontal synchronization frame signal may be transmitted within the horizontal blanking period.

Meanwhile, referring to FIGS. 2A and 2B, a vertical blanking interval is included in a video frame. In this case, the vertical synchronization frame signal may be transmitted toward the photodiode 120 through the laser 111 at the vertical synchronization blanking timing in the vertical blanking period. In addition, it is possible to change the display contents of the LED matrix 140 within the vertical blanking period.

Meanwhile, in the video frame, the first to the VR-th horizontal line start time exists. At this time, if each part in the video frame is enlarged, it can be displayed as a video line. In this case, a horizontal blanking interval is included in the video line. In this case, the horizontal synchronization timing may be arranged in the horizontal blanking period.

In the present invention, it is possible to monitor a nuclear power plant system device by operating a sensor based on the transmission period of the camera vertical synchronization frame signal. Accordingly, it is possible to prevent the EMI/RFI problem for the nuclear power plant system due to the use of synchronization devices other than the camera. In addition, there is an effect such as an increase in the operating life of the monitoring system as devices such as sensors are operated with low power at a certain period. In this regard, FIG. 3 shows a low-power operation state diagram according to a wireless data communication system and method for monitoring a nuclear power plant system device according to the present invention.

Referring to FIG. 3, a sensor provided in the processor 130 or communicatively connected thereto may be switched from a sleep state to a wake-up state at a predetermined period. At this time, it is possible to switch from a sleep state to a wake-up state through the laser 111 transmitted through the camera 110.

However, when all (laser) signals are received, the sensor does not perform sensing processing according to the sensing operation. Only when the received (laser) signal is within the same (or similar) range as the period of a specific type, sensing processing may be performed and sensing information (ie, state information) may be transmitted.

Meanwhile, the processor 130 is attached to a nuclear power plant system device and may be configured to operate a sensor based on a period of the vertical synchronization frame signal to obtain state information of the nuclear power plant safety system device. Specifically, the processor 130 may measure the period of the vertical synchronization frame signal and, if the measured period is similar to a predetermined period within a predetermined range, operate the sensor and obtain the state information.

Meanwhile, the LED matrix 140 is configured to display data associated with the state information and parity for the data. Accordingly, the wireless data communication system for monitoring all system devices according to the present invention may determine whether abnormal vibration or shock has occurred around which device among a plurality of nuclear power system devices based on the data of the LED matrix 140.

In this regard, FIG. 4 shows a structure of an LED array capable of displaying data related to state information of a nuclear power plant system and a parity of data according to the present invention. As shown in FIG. 3, the LED matrix 140 may be composed of a 15x8 data matrix and parity of the last row and column positions. Accordingly, it may be determined that the data is in error at the position of the data matrix corresponding to the row and column position in which the LED position corresponding to the parity is in an ON state. Alternatively, the number of LEDs in the ON state of all rows and columns including the parity is configured to always have an odd or even constant rule regardless of data, and it may be determined that it is a data error.

Meanwhile, the period of the vertical synchronization frame signal may be 15 bytes/frame per frame, 60 frames/sec per second, and the maximum transmission rate may be 15 bytes/frame x 60 frame/sec = 840 bytes/sec. Accordingly, the processor 130 measures the period of the vertical synchronization frame signal, and if the measured period is similar to a predetermined period of 840 bytes/sec within a certain range, the processor 130 operates the sensor and obtains the state information. can do.

Meanwhile, the processor 130 may perform different operations according to different period types of several receivable signals. Specifically, if the period of the signal received through the photodiode 120 is similar to the first period of the vertical synchronization frame signal within a certain range, the processor 130 may operate a sensor such as vibration, shock, temperature, or humidity. I can. In addition, if the cycle of the received signal is similar to the second cycle of the signal for checking the operation of the nuclear power plant within a certain range, the processor 130 may control to perform the operation check of the nuclear power plant.

Accordingly, there is an advantage in that the pan-tilt camera can detect the movement of an object according to the vibration of a specific area and notify the nuclear power plant system with a specific type of signal. In addition, events that are difficult for the camera to detect, such as EMI/RFI as in the present invention, have the advantage that the processor can detect the EMI/RFI at regular intervals through the pan-tilt camera.

On the other hand, according to such various event detection purposes (abnormal state, vibration detection, and EMI/RFI detection purposes), the laser 111 synchronized from the camera 110 at different periods may modulate the signal in various ways. In addition, the camera 110 or a plurality of cameras may transmit signals using different lasers according to the type of event. In this case, a laser identifier (ID) capable of distinguishing different lasers may be provided in the transmitted signal.

Meanwhile, the camera 110 may obtain information displayed on the LED matrix 140 to determine whether there is an abnormality in a nuclear power plant system device or a pipe. In this regard, the camera 110 may detect the data associated with the state information and the parity by capturing the LED matrix every frame. Meanwhile, a plurality of horizontal synchronization timings may be detected within the time period of each frame. In this case, a horizontal synchronization frame signal may be transmitted based on the horizontal synchronization timing.

Accordingly, the camera 110 performs pan control and tilt control as shown in FIG. 2 to the position of the pipe of the safety system device where the abnormal vibration or shock has occurred, based on the detected data. Any abnormal vibration or impact of the pipe can be photographed.

In the above, a wireless data communication system for monitoring a nuclear power plant system device according to the present invention has been described. Hereinafter, a wireless data communication method for monitoring a nuclear power plant system device according to another aspect of the present invention will be described. In this regard, the contents described in the wireless data communication system are also applicable to the wireless data communication method.

In this regard, FIG. 5 shows a flowchart of a wireless data communication method for monitoring a nuclear power plant system device according to the present invention.

The wireless data communication method for monitoring nuclear power plant equipment includes a process of transmitting a vertical synchronization frame signal (S110), a process of obtaining status information of a nuclear power plant system (S120), and a process of displaying status information (S130).

Meanwhile, in the process of transmitting the vertical synchronization frame signal (S110), the camera vertical synchronization frame signal is transmitted to the receiver, that is, the photodiode. In addition, in the process of acquiring the state information of the nuclear power plant system (S120), the state information of the nuclear power plant system may be obtained by attaching to the nuclear power plant system and operating a sensor based on the period of the vertical synchronization frame signal.

In addition, in the state information display process (S130), data associated with the state information and parity for the data may be displayed through an LED matrix.

On the other hand, in the process of acquiring the state information of the nuclear power plant system (S120), the period of the vertical synchronization frame signal is measured, and if the measured period is similar to a predetermined period within a certain range, the sensor is operated and the state information is obtained. I can.

In the above, a wireless data communication system and a method for monitoring a nuclear power plant system according to the present invention have been described. The wireless data communication system and method for monitoring a nuclear power plant system according to the present invention have technical effects as follows.

According to at least one embodiment of the present invention, there is an advantage in that wireless data on state information of a nuclear power plant system can be obtained in an environment in which the use of electromagnetic waves is limited.

In addition, according to at least one embodiment of the present invention, the operation time of the LED matrix, which occupies a significant portion of the power consumption of the battery-operated transmission unit, can be significantly reduced and can be used for a long time, thereby extending the operating life of the nuclear power plant system monitoring system. There is an advantage that there is.

In addition, according to at least one embodiment of the present invention, when an optical signal of a predetermined period is incident on the sensor unit through a portable device, etc., the operation state of the LED matrix can be seen with the naked eye, and the presence or absence of an abnormality in the system to be diagnosed can be determined. There is an advantage that there is.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

Those of ordinary skill in the art to which the present invention pertains will be able to make various modifications and variations without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain the technical idea, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

Claims (10)

In a wireless data communication system for monitoring equipment of a nuclear power plant,
A camera that transmits a camera vertical sync frame signal;
A processor attached to the nuclear power plant system device and operating a sensor based on a period of the vertical synchronization frame signal to obtain state information of the nuclear power plant system device; And
And an LED matrix indicating data associated with the state information and parity for the data,
The camera captures the LED matrix every frame to detect the data associated with the state information and the parity,
A wireless data communication system, characterized in that a plurality of horizontal synchronization timings are detected within the time period of each frame, and a plurality of horizontal synchronization frame signals are transmitted based on the plurality of horizontal synchronization timings. The method of claim 1,
The camera transmits the vertical synchronization frame signal toward the photodiode through a laser,
When the photodiode receives the vertical sync frame signal, the processor operates the sensor. The method of claim 2,
The processor,
When a period of the vertical synchronization frame signal is measured and the measured period is similar to a predetermined period within a predetermined range, the sensor is operated and the state information is obtained. delete The method of claim 1,
A wireless data communication system, characterized in that it is determined whether abnormal vibration or shock has occurred around which of a plurality of nuclear power plant system devices based on the data of the LED matrix. delete The method of claim 3,
The processor,
When the period of the signal received through the photodiode is similar to the first period of the vertical synchronization frame signal within a certain range, the sensor is operated,
If the cycle of the received signal is similar within a predetermined range with the second cycle of the signal for checking the operation of the nuclear power plant system, controlling to perform the operation check of the nuclear power plant system. The method of claim 1,
The LED matrix is composed of a 15x8 data matrix and the parity at the last row and column position, and the number of LEDs in the ON state of all rows and columns including the parity is always an odd or even number regardless of data. A wireless data communication system configured to have, and determining that it is a data error when the rule is violated. In the wireless data communication method for monitoring equipment of a nuclear power plant,
Transmitting a vertical synchronization frame signal for transmitting a camera vertical synchronization frame signal through a camera;
A nuclear power plant system device status information acquisition process attached to the nuclear power plant system device and operating a sensor based on a period of the vertical synchronization frame signal to obtain state information of the nuclear power plant system device; And
A status information display process of displaying data related to the status information and parity for the data through an LED matrix,
The camera captures the LED matrix every frame to detect the data associated with the state information and the parity,
A wireless data communication method, characterized in that a plurality of horizontal synchronization timings are detected within the time period of each frame, and a plurality of horizontal synchronization frame signals are transmitted based on the plurality of horizontal synchronization timings. The method of claim 9,
In the process of obtaining the state information of the nuclear power plant system,
When the period of the vertical synchronization frame signal is measured and the measured period is similar to a predetermined period within a predetermined range, the sensor is operated and the state information is obtained.

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