JP2007278847A - Intake deposited earth-and-sand monitoring system and monitoring method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a monitoring system capable of acquiring easily and accurately the deposition state of earth and sand in an intake of a hydroelectric power station, without an operator having to visit the site. <P>SOLUTION: This system is equipped with a monitoring device 1 installed in the hydroelectric power station; and a deposited earth-and-sand measuring/managing device 30 installed near the intake, for measuring and managing the deposited earth-and-sand. The deposited earth-and-sand measuring/managing device 30 is equipped with an ultrasonic measuring device 31 for measuring the thickness of the deposited earth-and-sand in the intake, by utilizing an ultrasonic wave transmitted from an ultrasonic sensor 31a, an image processing part 33 for converting a measured signal measured by the ultrasonic measuring device 31 into an image signal, and a transmission part 34 for transmitting the image signal image-processed by the image processing part 33 to the monitoring device 1. The monitoring device 1 is equipped with a monitoring personal computer 2 for acquiring the image signal of the intake, by controlling the ultrasonic measuring device 31 and the image processing part 33, respectively, and a display for displaying the acquired image signal. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an intake sediment monitoring system and a monitoring method for a hydroelectric power plant.

In a hydroelectric power station that takes in water for power generation from a river and generates power by rotating a water turbine, once the river water flowing through the river is taken into a water intake as shown in FIG. 6, it is used for power generation through a water conduit. I am trying to guide you to a watermill. By the way, since the intake port as described above is composed of a concrete structure, sediment is gradually deposited on the bottom surface of the water intake from the river. If the accumulated sediment flows into the hydroelectric power plant from the intake, the waterway and the water wheel will wear out, so it is necessary to grasp the sediment accumulation status so that the sediment deposited in the intake does not flow into the power plant. is there.
Therefore, in conventional hydroelectric power stations, workers regularly visit the water intakes to grasp the state of sediment that has been deposited by visual inspection or the like.

Patent Document 1 discloses an underwater measuring device that can be constantly monitored, does not require skill, and can easily measure water depth, water level, and the like. Further, Patent Document 2 discloses a terrain change monitoring system that can determine whether or not a terrain change has actually occurred due to a landslide or river flooding.
Japanese Patent Laid-Open No. 11-23704 JP 2004-361157 A

However, since the water level (water depth) of the intake port is usually about 2 to 3 m, if the water is cloudy or stagnant, the state of sediment accumulation cannot be visually observed. For this reason, it is necessary to perform surveying or the like to grasp the sedimentation state of the sediment, and there is a drawback that it takes time to measure the sediment.
Moreover, since the sedimentation situation in the intake is not uniform, in order to grasp the sedimentation situation in the entire intake, it is necessary to increase the number of surveying points, and there is a drawback that it takes time for the survey.
Furthermore, in order to grasp the state of sediment accumulation in the water intake, it is necessary for the worker to go to the water intake regularly, and there is a drawback that it is impossible to grasp in real time. For this reason, for example, when a worker is close to the water intake, such as during heavy rain, and the accumulation situation cannot be grasped, there is a possibility that a large amount of earth and sand flows into the waterway and the water wheel in the hydroelectric power plant.

  Therefore, the present invention has been made in view of the above-described points, and a hydroelectric power plant that allows an operator to easily and accurately grasp the state of sediment accumulation in the water intake without going to the water intake. The purpose is to provide a monitoring system and monitoring method for sediment at the intake.

  In order to achieve the above object, the present invention described in claim 1 is a water intake sedimentation monitoring system for a hydroelectric power station that monitors sediment deposited in a water intake for taking water for hydroelectric power generation. A monitoring device installed in the vicinity of the intake, and a sediment measuring device for measuring the sediment thickness, and the sediment measuring device has an ultrasonic sensor and is transmitted from the ultrasonic sensor. Ultrasonic measurement means that measures the sediment thickness in the intake using ultrasonic waves and outputs a measurement signal; image processing means that converts the measurement signal from the ultrasonic measurement means into an image signal; and Transmission means for transmitting the image signal processed by the image processing means to the monitoring device, and the monitoring device controls the ultrasonic measurement means and the image processing means, respectively, to control the image of the intake port. Get signal And control means, and having a display means for displaying an image signal acquired.

  The present invention described in claim 2 is a water intake sedimentation monitoring system for a hydroelectric power plant that monitors sediment deposited in a water intake for taking water for hydroelectric power generation, and a monitoring device installed in the hydroelectric power plant, A sedimentation sediment management device installed in the vicinity of the water intake and managing sedimentation sediment thickness, and the sedimentation sediment management device has an ultrasonic sensor and uses ultrasonic waves transmitted from the ultrasonic sensor. Ultrasonic measurement means for measuring the sediment thickness in the intake, and periodically measuring sediment sediment by the ultrasonic measurement means, and when the sediment thickness in the intake is greater than or equal to a predetermined thickness Management means for outputting an alarm signal, and the monitoring device has an alarm output means for outputting an alarm based on an alarm signal from the management means.

  The present invention described in claim 3 is a water intake sedimentation monitoring system of a hydroelectric power station that monitors sediment deposited in a water intake for taking water for hydroelectric power generation, and a monitoring device installed in the hydroelectric power station, A sedimentation sediment measurement / management device installed near the water intake and measuring and managing sedimentation sediment thickness, and the sedimentation sediment measurement / management device has an ultrasonic sensor and is transmitted from the ultrasonic sensor. Ultrasonic measurement means for measuring the sediment thickness in the intake using ultrasonic waves and outputting a measurement signal, image processing means for converting the measurement signal from the ultrasonic measurement means into an image signal, and Transmission means for transmitting the image signal processed by the image processing means to the monitoring device, and measurement of sedimentation sediment by the ultrasonic measurement means are periodically executed, and the sedimentation sediment thickness in the water intake is a predetermined thickness. More than Management means for outputting a warning signal at a time, and the monitoring device controls the ultrasonic measurement means and the image processing means, respectively, and obtains an image signal of the water intake, Display means for displaying the image signal, and alarm output means for outputting an alarm based on the alarm signal from the management means.

According to a fourth aspect of the present invention, in the intake sedimentary sediment monitoring system according to any one of the first to third aspects, the ultrasonic sensor is moved along the intake port. It is characterized by that.
According to a fifth aspect of the present invention, in the intake sedimentary sediment monitoring system according to any one of the first to third aspects, a plurality of the ultrasonic sensors are arranged along the intake port. And

The present invention as set forth in claim 6 is a method for monitoring the sediment deposited in the intake of a hydroelectric power station for monitoring the sediment deposited in the intake for taking water for hydroelectric power generation, and uses ultrasonic waves transmitted from an ultrasonic sensor. Then, a measurement step for measuring the sediment thickness in the intake, an image processing step for converting the measurement signal measured by the measurement step into an image signal, and a display step for displaying the image signal image-processed by the image processing step It is characterized by having.
The present invention as set forth in claim 7 is a method for monitoring the sediment accumulated in the intake of a hydroelectric power station for monitoring the sediment deposited in the intake for taking water for hydroelectric power generation, and uses ultrasonic waves transmitted from an ultrasonic sensor. And a measuring step for measuring the sediment thickness in the intake and an alarm output step for outputting an alarm signal when the sediment thickness in the intake is equal to or greater than a predetermined thickness.

According to the present invention, since the thickness of the sediment deposited in the water intake is measured using the ultrasonic measurement means, the sediment deposition state is accurately measured in a short time even when the river is cloudy or stagnant. be able to.
Further, the present invention obtains the image signal of the intake by controlling the ultrasonic measurement means and the image processing means of the sediment measurement apparatus installed in the vicinity of the intake by the control device of the monitoring apparatus installed in the hydroelectric power plant. In addition, since the acquired image signal is displayed on the display means, it is possible to grasp in real time the state of sediment deposited in the water intake at the hydroelectric power plant.

Further, according to the present invention, the sedimentation sediment thickness in the intake port is periodically measured by the ultrasonic measurement unit under the control of the management unit of the sediment control apparatus installed near the intake port, and the sediment thickness in the intake port is a predetermined thickness. Since the alarm signal is output to the alarm output means provided in the monitoring device when the temperature exceeds the limit, the operator of the hydroelectric power station before the sediment in the intake port flows into the water conduit It is possible to inform that there is a risk of earth and sand flowing into the conduit.
Further, according to the present invention, when a moving means for moving the ultrasonic sensor along the water inlet is provided, it is possible to grasp the sediment state of the entire water inlet in a short time with one ultrasonic sensor.
Further, even if a plurality of ultrasonic sensors are arranged along the water intake, it is possible to grasp the sediment accumulation state of the entire water intake in a short time. In this case, a plurality of ultrasonic sensors are required. However, since no moving means for moving the ultrasonic sensors along the water inlet is required, there is no need for maintenance of the moving means, which is advantageous in terms of cost. become.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing a configuration of a water intake sedimentation monitoring system for a hydroelectric power plant according to an embodiment of the present invention.
1 is composed of a monitoring device 1 installed in a hydroelectric power plant and a sediment measurement / control device 30 installed in the vicinity of a river water intake. The
The monitoring device 1 is provided with a monitoring personal computer (hereinafter referred to as “monitoring personal computer”) 2 as control means and an alarm device 3 as alarm output means.
The monitoring personal computer 2 is connected to the transmission unit 34 of the sediment sediment measurement / management device 30 via the in-house network 4 and can acquire an image signal of sediment accumulated in the water intake from the sediment sediment measurement / management device 30. It has become. Note that the monitoring personal computer 2 of the monitoring device 1 and the transmission unit 34 of the sediment measurement / management device 30 may be connected via a local area network (LAN), the Internet, or the like.

FIG. 2 is a diagram illustrating a hardware configuration example of the monitoring personal computer 2.
In FIG. 2, a CPU (Central Processing Unit) 11 controls the entire monitoring personal computer 2. A ROM (Read Only Memory) 12 stores program data and the like, and the CPU 11 reads the data via the bus 10 as necessary, thereby executing processing according to the stored program. A RAM (Random Access Memory) 13 appropriately stores data, programs, and the like necessary for the CPU 11 to execute various processes. The hard disk drive (HDD) 14 includes a hard disk (HD) 15 as a storage medium, and the CPU 11 records or reads data, programs, and the like on the HD 15. In this case, the CPU 11 reads out an application program stored in the HD 15 of the HDD 14 and develops it in the RAM 13 to execute various processes according to the application program.
In addition, a display 16 is connected to the internal bus 10, and a keyboard 17 and a mouse 18 as input means are connected. A modem 19 is connected to the internal bus 10 and is connected to the in-house network 4 via the modem 19. Further, an output device such as a printer 20 is connected to the internal bus 10 via a printer I / F.

  In the monitoring personal computer 2 configured as described above, the operator performs a necessary operation with the keyboard 17 and the mouse 18, and thereby the image signal of the sediment accumulated in the water intake is received from the sediment sediment measurement / management device 30. Since it can be obtained, the image of the earth and sand accumulated in the water intake can be displayed on the display 16 in real time. On the other hand, the alarm device 3 of the monitoring device 1 is composed of, for example, a voice output device such as a speaker, a display device, etc., and measures sediment sediment through a relay panel 5 and a remote monitoring control panel (TC panel) 6 which are existing facilities. / When alarm information is sent from the sediment control unit 36 of the management device 30, an alarm sound is generated or an alarm screen is displayed.

The sediment measurement / management apparatus 30 includes an ultrasonic measuring device (ultrasonic measuring means) 31 including an ultrasonic sensor 31a, a sensor driving unit (sensor moving unit) 32, an image processing unit (image processing unit) 33, and a transmission unit. (Transmission means) 34, modem 35, and sediment sediment management section (management means) 36 are provided to measure and manage sediment deposited in the water intake.
The ultrasonic measuring device 31 receives the reflected sound emitted from the bottom of the river when the ultrasonic wave is transmitted from the ultrasonic sensor 31a, and measures the sediment thickness deposited on the bottom of the river.

In the present embodiment, a driving device or the like (not shown) is attached to the ultrasonic sensor 31a, and is configured to be movable on the rail 41 attached along the longitudinal section of the water intake. The movement of the ultrasonic sensor 31 a is controlled by the sensor driving unit 32.
The sensor driving unit 32 controls the driving of the ultrasonic sensor 31 a by a control signal transmitted from the monitoring personal computer 2 to the transmission unit 34 or a control signal from the sediment control unit 36.
The image processing unit 33 converts the measurement signal measured by the ultrasonic measuring device 31 into an image signal based on the control signal transmitted from the monitoring personal computer 2 to the transmission unit 34.

FIG. 3 is a diagram illustrating an example of an image converted into an image by the image processing unit 33.
When the measurement is performed using the ultrasonic sensor 31a, the transmission transmitted from the ultrasonic sensor 31a is performed between the hard structure such as concrete on the bottom of the river and the sediment such as sand and mud deposited on the structure 51. Wave reflection intensity is different. As a result, when the measurement signal measured in the water intake by the ultrasonic measuring device 31 is image-processed by the image processing unit 33, an image of the accumulated sediment 52 deposited on the concrete structure unit 51 as shown in FIG. 3 can be obtained. it can.
The transmission unit 34 includes a modem 35, and a control signal transmitted from the monitoring personal computer 2 via the modem 35 is transmitted to the sensor driving unit 32 and the image processing unit 33, and an image is controlled by the control of the monitoring personal computer 2. The image signal subjected to the image processing in the processing unit 33 is transmitted to the monitoring personal computer 2 via the modem 35.

  The sediment control unit 36 is constituted by, for example, a personal computer, and periodically controls the ultrasonic measuring device 31 and the sensor driving unit 32 to execute measurement of the sediment thickness deposited in the water intake. When the thickness of sedimentary sediment measured by the sonic measuring instrument 31 exceeds a predetermined thickness that may cause sediment to flow into the water conduit or water turbine in the intake, the relay panel 5 and the TC panel 6 are used. The alarm signal is output to the alarm device 3 of the monitoring device 1. Needless to say, the thickness of the sediment that outputs an alarm signal from the sediment management unit 36 can be arbitrarily set. The main hardware configuration of the sediment control unit 36 is the same as that shown in FIG.

Next, a method for monitoring sedimentary sediment by the intake sediment sediment monitoring system of the present embodiment will be described.
FIG. 4 is a flowchart showing the first embodiment of the sediment monitoring method by the intake sediment sediment monitoring system of the present embodiment.
The sediment monitoring method shown in FIG. 4 is realized by the operator operating the keyboard 17 and mouse 18 of the monitoring personal computer 2 and the CPU 11 executing a program recorded in advance on the HD 15.
In this case, the monitoring personal computer 2 first outputs a control signal to the ultrasonic measuring device 31 via the transmission unit 34 to measure the sediment thickness deposited in the water intake (S1). Next, a control signal for controlling the image processing unit 33 is output via the transmission unit 34, and the measurement signal measured by the ultrasonic measuring device 31 is converted into an image signal (S2). Next, the monitoring personal computer 2 outputs a control signal to the transmission unit 34 and transmits the image signal converted by the image processing unit 33 to the monitoring personal computer 2 (S3). Then, the transmitted image signal is displayed on the display 16 of the monitoring personal computer 2.

FIG. 5 is a flowchart showing a second embodiment of the sediment monitoring method by the intake sediment sediment monitoring system of the present embodiment.
5 is realized by the CPU of the sediment management unit 36 of the sediment measurement / management apparatus 30 executing a program recorded in advance on the HD.
In this case, the sediment control unit 36 first controls the ultrasonic measuring device 31 to measure the sediment thickness deposited in the water intake (S11). Next, it is determined whether or not the sediment thickness measured by the ultrasonic measuring device 31 is equal to or greater than a predetermined thickness. If it is determined that the thickness is equal to or greater than the predetermined thickness (Y in S12), an alarm of the monitoring device 1 is issued. An alarm signal is output to the device 3 (S13).

  On the other hand, if the sediment thickness measured by the ultrasonic measuring instrument 31 is not equal to or greater than the predetermined thickness (N in S12), the process is terminated without outputting an alarm signal to the alarm device 3 of the monitoring device 1. To do. In the present embodiment, the case where the alarm signal from the sediment control unit 36 is output only to the alarm device 3 of the monitoring device 1 has been described as an example. However, this is only an example, and the sediment control is performed. The alarm signal from the unit 36 may be output to the monitoring personal computer 2 of the monitoring device 1, and an alarm screen corresponding to the alarm signal may be displayed together with the image signal from the image processing unit 33 on the monitoring personal computer 2.

As described above, in the intake sediment sediment monitoring system of the present embodiment, the thickness of the sediment deposited in the intake port is measured using the ultrasonic measuring device (ultrasonic measuring means) 31. Even when the river is cloudy or stagnant, it is possible to accurately grasp the state of sediment accumulation in the water intake in a short time.
In addition, the monitoring personal computer 2 of the monitoring device 1 installed in the hydroelectric power station controls the ultrasonic measuring device 31, the sensor driving unit 32, and the image processing unit 33 of the sediment measurement / management device 30 installed in the vicinity of the water intake. Since the image signal of the intake port is acquired and the acquired image signal is displayed on the display (display means) 16 of the monitoring personal computer 2, it is possible to grasp in real time the state of sediment accumulated in the intake port at the hydroelectric power plant. Can do.

  Further, in the intake sediment sediment monitoring system of the present embodiment, sedimentation in the intake by the ultrasonic measuring device 31 is controlled by the sediment control unit (management means) 36 of the sediment measurement / management apparatus 30 installed in the vicinity of the intake. Periodically measure the sediment thickness and alert the alarm device (alarm output means) 3 provided in the monitoring device 1 when the sediment thickness in the water intake reaches a predetermined thickness or more. A signal is output. This makes it possible to notify the operator of the hydroelectric power plant that there is a risk of sediment flowing in before the sediment sediment in the intake port flows into the water conduit. In addition, with this configuration, it is possible to fully understand the inflow of sediment in the intake, even during flooding when heavy rain falls and the inflow from the river increases. A large amount of earth and sand can be prevented from flowing in.

Further, in the present embodiment, the ultrasonic sensor 31a is configured to be driven along the rail 41 attached along the longitudinal section of the water intake port, thereby providing a sensor moving means for moving the ultrasonic sensor 31a along the rail 41. Therefore, it is possible to grasp the sedimentation status of the entire intake in a short time.
The same effect can be obtained by arranging a plurality of ultrasonic sensors 31a along the water inlet instead of the sensor moving means. In this case, a plurality of ultrasonic sensors 31a are required. However, the rail 41 and the driving device for moving the ultrasonic sensors 31a along the water outlet are unnecessary, and the maintenance and the like are unnecessary. Therefore, the arrangement of a plurality of ultrasonic sensors 31a is advantageous in terms of cost compared to the case where the sensor moving means is provided.

  Moreover, in this embodiment, the sedimentation sediment measuring apparatus which measures the sedimentation sediment thickness in a water intake by the monitoring personal computer 2 of the monitoring apparatus 1, and the sedimentation sediment which carries out management by measuring sedimentation sediment thickness regularly by the sedimentation sediment management part 36. Although the case where the management device is configured integrally is described as an example, this is only an example, and the sediment measurement device and the sediment management device may be configured separately. Needless to say.

The figure which showed the structure of the intake sediment sediment monitoring system of the hydroelectric power station which is embodiment of this invention. The figure which showed the structural example of the hardware of the personal computer 2 for monitoring. The figure which showed an example of the image converted into the image in the image process part. The flowchart which showed 1st Embodiment of the monitoring method of sedimentary sediment by the intake sediment sediment monitoring system of this embodiment. The flowchart which showed 2nd Embodiment of the monitoring method of sedimentary sediment by the intake sediment sediment monitoring system of this embodiment. The figure which showed the structure of the intake of a hydroelectric power station.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Monitoring apparatus, 2 ... Monitoring PC, 3 ... Alarm apparatus, 4 ... Internal network, 5 ... Relay board, 6 ... TC board, 10 ... Internal bus, 11 ... CPU, 12 ... ROM, 13 ... RAM, 14 ... HDD, 15 ... HD, 16 ... Display, 17 ... Keyboard, 18 ... Mouse, 19 ... Modem, 20 ... Printer, 30 ... Sediment measurement / management apparatus, 31 ... Ultrasonic measuring instrument, 31a ... Ultrasonic sensor, 32 DESCRIPTION OF SYMBOLS Sensor drive part 33 ... Image processing part 34 ... Transmission part 35 ... Modem 36 ... Deposit sediment control part 41 ... Rail 51 ... Concrete structure part 52 ... Deposit sediment

Claims (7)

An intake sedimentation monitoring system for a hydroelectric power station that monitors sediment deposited in an intake for taking water for hydropower generation,
A monitoring device installed in a hydroelectric power plant, and a sedimentation sediment measuring device installed in the vicinity of the intake and measuring sedimentation sediment thickness,
The sedimentation sediment measuring device has an ultrasonic sensor, measures the sedimentation sediment thickness in the intake using ultrasonic waves transmitted from the ultrasonic sensor, and outputs a measurement signal; and Image processing means for converting a measurement signal from the ultrasonic measurement means into an image signal, and transmission means for transmitting the image signal processed by the image processing means to the monitoring device,
The monitoring device includes a control unit that acquires the image signal of the intake port by controlling the ultrasonic measurement unit and the image processing unit, respectively, and a display unit that displays the acquired image signal. Intake sediment sediment monitoring system. An intake sedimentation monitoring system for a hydroelectric power station that monitors sediment deposited in an intake for taking water for hydropower generation,
A monitoring device installed in a hydroelectric power plant, and a sedimentation sediment management device installed in the vicinity of the water intake for managing sedimentary sediment thickness,
The sediment management apparatus has an ultrasonic sensor, and measures ultrasonic deposition means for measuring the sediment thickness in the water intake using ultrasonic waves transmitted from the ultrasonic sensor, and deposits by the ultrasonic measurement means. Management means for periodically executing measurement of earth and sand and outputting an alarm signal when the sediment thickness in the intake is greater than or equal to a predetermined thickness,
The monitoring apparatus has an alarm output means for outputting an alarm based on an alarm signal from the management means. An intake sedimentation monitoring system for a hydroelectric power station that monitors sediment deposited in an intake for taking water for hydropower generation,
A monitoring device installed in a hydroelectric power plant, and a sedimentation sediment measurement / management device installed near the intake and measuring sedimentary sediment thickness and management,
The sedimentation sediment measurement / management device includes an ultrasonic measurement unit that has an ultrasonic sensor, measures the sedimentation sediment thickness in the water intake using ultrasonic waves transmitted from the ultrasonic sensor, and outputs a measurement signal. An image processing means for converting a measurement signal from the ultrasonic measurement means into an image signal, a transmission means for transmitting an image signal processed by the image processing means to the monitoring device, and sedimentary sediment by the ultrasonic measurement means And a management means for outputting an alarm signal when the sediment thickness in the intake is greater than or equal to a predetermined thickness.
The monitoring device controls the ultrasonic measurement unit and the image processing unit to acquire an image signal of the intake port, a display unit that displays the acquired image signal, and a management unit And an alarm output means for outputting an alarm based on the alarm signal.   The intake sedimentary sediment monitoring system according to any one of claims 1 to 3, further comprising moving means for moving the ultrasonic sensor along the intake port. Monitoring system.   The intake sedimentary sediment monitoring system according to any one of claims 1 to 3, wherein a plurality of the ultrasonic sensors are arranged along the intake port. A method for monitoring sediment accumulation in a water intake of a hydroelectric power station for monitoring sediment deposited in a water intake for taking water for hydroelectric power generation,
A measurement step for measuring the sediment thickness in the intake using ultrasonic waves transmitted from an ultrasonic sensor, an image processing step for converting a measurement signal measured in the measurement step into an image signal, and the image processing step And a display step for displaying an image signal image-processed by the method. A method for monitoring sediment accumulation in a water intake of a hydroelectric power station for monitoring sediment deposited in a water intake for taking water for hydroelectric power generation,
A measurement step for measuring the sediment thickness in the intake using ultrasonic waves transmitted from an ultrasonic sensor, and an alarm output for outputting an alarm signal when the sediment thickness in the intake is greater than or equal to a predetermined thickness A method for monitoring intake sedimentation sediment.

Images