Dam on-line safety monitoring and early warning equipment of pumped storage power station

Abstract

The utility model relates to the technical field of pumped storage power stations, and discloses dam on-line safety monitoring and early warning equipment for a pumped storage power station, which comprises a signal conditioning device comprising a sensor signal conditioning unit, a Beidou signal conditioning unit and an image signal conditioning unit, the sensor signal conditioning unit comprises an amplifying circuit, a filter circuit, an analog-to-digital circuit and an isolating circuit, the Beidou signal conditioning unit comprises a radio frequency front-end circuit, a digital signal processing circuit and a positioning resolving circuit, and the image signal conditioning unit comprises an image sensor interface and an analog-to-digital conversion circuit. The dam online safety monitoring and early warning equipment of the pumped storage power station comprises an amplifying circuit, a filter circuit, an analog-to-digital circuit, an isolating circuit, a radio frequency front-end circuit, a digital signal processing circuit, a positioning resolving circuit, an image sensor interface and an analog-to-digital conversion circuit in a signal conditioning device. Dam safety and stability and efficient and scientific operation of a power station are powerfully guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of pumped storage power station technology, specifically to an online safety monitoring and early warning device for pumped storage power station dams. Background Technology

[0002] A pumped-storage hydroelectric power station is a special type of hydroelectric power station that uses excess electricity to pump water into an upper reservoir to store potential energy during periods of low electricity demand, and then releases the water into the lower reservoir to generate electricity during periods of high demand, thus achieving the storage and release of electrical energy. The main function of the pumped-storage dam is to intercept the water flow, forming upper and lower reservoirs, providing sufficient water storage space for the upper reservoir to store potential energy during periods of low electricity demand. For dam safety, pumped-storage dams require online safety monitoring and early warning equipment.

[0003] Common online safety monitoring and early warning systems for pumped storage power station dams typically consist of sensor monitoring equipment, data acquisition terminals, and a monitoring center. The sensor monitoring equipment can monitor not only horizontal and vertical displacement of the dam body, but also seepage flow, seepage pressure, and phreatic line. The data acquisition terminal receives data from the sensor monitoring equipment and performs preliminary processing. The monitoring center receives data from the data acquisition terminal and, using advanced data processing algorithms and intelligent analysis models, processes and analyzes the received data in real time to accurately assess the dam's safety status.

[0004] Traditional online safety monitoring and early warning equipment for pumped storage power station dams, without signal conditioning devices, suffers from numerous technical shortcomings. These include: signal quality issues such as difficulty in accurately acquiring weak signals and severe noise interference leading to large data errors or even data loss; compatibility and adaptability issues such as inconsistent signal types and interface standards causing processing difficulties and access obstacles for data acquisition equipment; dynamic range and accuracy issues such as signals exceeding the acquisition equipment's range and inability to guarantee accuracy, failing to meet high-precision monitoring requirements; and stability and reliability issues such as weak anti-interference capabilities and susceptibility to failure during long-term operation, causing data fluctuations, errors, and even transmission interruptions, severely impacting effective monitoring and early warning of dam safety conditions and hindering the safe and stable operation of the dam and the scientific management of the power station. Therefore, this paper proposes an online safety monitoring and early warning device for pumped storage power station dams. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides an online safety monitoring and early warning device for pumped storage power station dams, thereby solving the aforementioned technical problems that cannot guarantee the safety and stability of dams and the efficient and scientific operation of power stations.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: an online safety monitoring and early warning device for pumped storage power station dams, comprising:

[0009] The equipment housing, and a display screen located on the front of the equipment housing, with control buttons added to the lower part of the display screen, and an alarm speaker installed below the control buttons;

[0010] A signal conditioning device is disposed on the top of the equipment housing, and the signal conditioning device includes a sensor signal conditioning unit, a Beidou signal conditioning unit, and an image signal conditioning unit. The sensor signal conditioning unit includes an amplification circuit, a filtering circuit, an analog-to-digital circuit, and an isolation circuit, and the Beidou signal conditioning unit includes a radio frequency front-end circuit, a digital signal processing circuit, and a positioning calculation circuit. The image signal conditioning unit includes an image sensor interface and an analog-to-digital conversion circuit.

[0011] Strain sensors, displacement sensors, tilt sensors, seepage pressure sensors, temperature sensors, rainfall sensors, monitoring cameras, and BeiDou positioning devices are installed on the outside of the equipment housing. The strain sensors and temperature sensors are installed inside the dam. The displacement sensors are installed on the centerline of the dam crest and on the upstream and downstream faces of the dam body. The tilt sensors are installed on the upstream and downstream faces of the dam body, on the left and right banks, at the turning points of the dam body, and at the joints of the dam sections. The seepage pressure sensors are installed on the dam foundation, dam shoulders, and inside the dam body. The rainfall sensors are installed on the slopes of the dam. The monitoring cameras are installed on both sides of the dam crest and on the upstream and downstream faces of the dam. The BeiDou positioning devices are installed on the centerline of the dam crest, on the upstream and downstream slopes, on the dam shoulders, and on the dam body. Strain sensors monitor dam deformation based on the piezoresistive effect of strain gauges or the photoelastic effect of optical fibers. When the dam body deforms under external forces, the strain at the corresponding location is determined by measuring the resistance value of the strain gauge or the change in the reflected wavelength of the fiber optic grating. Available product models include OS3150, OS3155, and SG-YB-DM-1. Displacement sensors determine the spatial displacement of the dam body. Available product models include HDM-L. Tilt sensors detect changes in the tilt angle of the dam body through internal sensitive elements and convert them into electrical signals. Available product models include XW-TS1130 and ELT-15. Pressure sensors measure changes in pore water pressure within the dam body to reflect seepage. Available product models include TJ-20, TJ-30, and AR-SS-SYJ06. Temperature sensors detect changes in internal temperature within the dam body. Available product models include NTC0805J6K8. Rainfall sensors detect precipitation and intensity; suitable product models include CG-04-D1. Monitoring cameras capture images of the dam surface and upstream and downstream reservoir slopes; suitable product models include ZF-IPC-08K11. Beidou positioning devices acquire information on the positional changes of key monitoring points on the dam and upstream and downstream reservoir slopes in three-dimensional space, such as horizontal displacement, vertical displacement, and settlement, to monitor structural deformation in real time; suitable product models include TN521.

[0012] Working principle of signal conditioning device:

[0013] The amplifier circuit is connected to the output of the sensor and uses electronic components such as transistors and operational amplifiers to amplify the weak signal output by the sensor. The filter circuit is connected to the amplifier circuit and uses a built-in filter to remove noise mixed into the sensor signal during acquisition and transmission. The analog-to-digital circuit is connected to the filter circuit and is used to convert the amplified and filtered analog signal into a digital signal. The isolation circuit is set at different positions in the signal transmission path, such as between the sensor and the amplifier circuit or between the amplifier circuit and the filter circuit, to cut off the electrical connection in the signal transmission path and prevent common-mode interference and ground loop interference from affecting the signal.

[0014] The radio frequency (RF) front-end circuit connects to the antenna and is used to amplify, filter, and down-convert the RF signals received by the antenna from the BeiDou satellites, converting high-frequency satellite signals into intermediate-frequency (IF) signals. The digital signal processing circuit connects to the RF front-end circuit and is used to digitize the IF signals, including decoding, demodulation, and filtering, to extract information such as the satellite's position, velocity, and time. The positioning calculation circuit connects to the digital signal processing circuit and is used to determine the latitude and longitude coordinates corresponding to the positioning based on the satellite data output by the digital signal processing circuit.

[0015] The image sensor interface connects to the surveillance camera, receives weak current signals through a built-in buffer amplifier, and converts them into voltage signals; the analog-to-digital converter circuit connects to the voltage signals at the image sensor interface and converts them into digital format.

[0016] Various sensors collect data and transmit it to the equipment housing via signal conditioning. The data is displayed on a screen, and adjustments are made via control buttons. Simultaneously, if an anomaly is detected in the pumped-storage power station dam, an alarm speaker will sound, and the alarm signal can be transmitted externally. By amplifying weak signals for accurate acquisition and filtering to remove noise interference, the accuracy and reliability of the data are greatly improved. Signals from different types and interface standards are uniformly processed and converted to ensure smooth system access and comprehensive, stable data acquisition. Attenuation and optimization processes effectively improve monitoring accuracy within a suitable range, meeting the high-precision monitoring requirements of the dam. Signal isolation and other anti-interference measures reduce the impact of external factors on the signal, ensuring long-term stable operation of the system and providing continuous and accurate data support for dam safety monitoring, thus strongly guaranteeing the safety and stability of the dam and the efficient and scientific operation of the power station.

[0017] Preferably, the lower front of the device housing has a storage cavity, and a pull-out drawer is slidably connected inside the storage cavity. The top of the pull-out drawer has evenly spaced placement slots. This allows components used during monitoring, such as sensors, to be placed in the placement slots, and the pull-out drawer to be retracted into the storage cavity. This not only facilitates storage but also allows for easy removal and replacement.

[0018] Preferably, a drive motor is mounted on the upper surface of the equipment housing, and limit side grooves are formed on both sides of the equipment housing. A threaded screw is rotatably connected to the inner cavity of the limit side groove, and the threaded screw is coaxially connected to the drive motor. A sliding block is sleeved on the surface of the threaded screw, and a protective outer plate is connected to the outer side of the sliding block, with the protective outer plate fitting against the front of the equipment housing. The drive motor drives the threaded screw to rotate within the limit side groove on the equipment housing, while the sliding block, according to the rotation of the threaded screw, moves the protective outer plate up and down along the inner wall of the limit side groove. This not only provides protection for the equipment housing but also facilitates disassembly.

[0019] Preferably, the strain sensors are arranged in a grid pattern or along the key stress direction on the dam at certain intervals, and the displacement sensors include tension wire displacement sensors, total station automated monitoring prisms, and laser displacement sensors. The tension wire displacement sensors use a taut steel wire as a reference line. When the dam body undergoes horizontal displacement, the horizontal displacement of the dam body is determined by measuring the relative displacement between the measuring point fixed on the dam body and the steel wire. The total station automated monitoring prism observes the prism using a total station, and the spatial displacement of the dam body is determined based on the changes in the prism's three-dimensional coordinates.

[0020] Preferably, the tilt sensors are installed at regular intervals on the dam, and the pressure sensors are installed at different depths and planar positions on the dam at regular intervals. This allows the tilt sensors and pressure sensors to capture tilt and pressure changes in a timely manner, thereby ensuring effective monitoring.

[0021] Preferably, the BeiDou positioning device is mounted on the dam surface using a fixed bracket, and the device housing can be secured with ground anchors. The fixed bracket allows the BeiDou positioning device to be easily installed at different locations on the dam, thus ensuring its stability during use.

[0022] (III) Beneficial Effects

[0023] Compared with the prior art, this utility model provides an online safety monitoring and early warning device for pumped storage power station dams, which has the following beneficial effects:

[0024] The online safety monitoring and early warning equipment for the pumped storage power station dam uses an amplification circuit in the signal conditioning unit connected to the sensor output to amplify the weak signals output by the sensor. A filtering circuit connected to the amplification circuit removes noise mixed in during sensor signal acquisition and transmission. An analog-to-digital converter connected to the filtering circuit converts the amplified and filtered analog signal into a digital signal. Isolation circuits are placed at different locations along the signal transmission path to disconnect electrical connections. A radio frequency (RF) front-end circuit connects to the antenna to convert high-frequency satellite signals into intermediate frequency (IF) signals. A digital signal processing circuit connects to the RF front-end circuit to digitize the IF signal. A positioning calculation circuit connects to the digital signal processing circuit to determine the latitude and longitude coordinates corresponding to the positioning from the satellite data output by the digital signal processing circuit. An image sensor interface connects to the monitoring camera, receiving weak current signals through a built-in buffer amplifier and converting them into voltage signals. An analog-to-digital converter circuit connects to the voltage signal at the image sensor interface to convert it into digital format. This effectively ensures the safety and stability of the dam and the efficient and scientific operation of the power station. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the equipment housing and its connection structure of this utility model;

[0027] Figure 3 This is a schematic diagram showing the installation location of the sensor on the dam according to this utility model;

[0028] Figure 4 This is a schematic block diagram of the signal conditioning device of this utility model.

[0029] In the diagram: 1. Equipment housing; 2. Display screen; 3. Control buttons; 4. Alarm speaker; 5. Storage cavity; 6. Sliding drawer; 7. Placement slot; 8. Drive motor; 9. Limiting side slot; 10. Threaded screw; 11. Sliding block; 12. Protective outer plate; 13. Signal conditioning device; 14. Strain sensor; 15. Displacement sensor; 16. Tilt sensor; 17. Pressure sensor; 18. Temperature sensor; 19. Rain sensor; 20. Monitoring camera; 21. Beidou positioning device. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] This utility model provides a technical solution: an online safety monitoring and early warning device for pumped storage power station dams, comprising: (Please refer to...) Figure 2 The equipment housing 1, and the display screen 2 located on the front of the equipment housing 1, with a control button 3 added to the lower part of the display screen 2, and an alarm speaker 4 installed at the lower part of the control button 3;

[0032] Please see Figure 4 The signal conditioning device 13 is disposed on the top of the device housing 1, and the signal conditioning device 13 includes a sensor signal conditioning unit, a Beidou signal conditioning unit, and an image signal conditioning unit. The sensor signal conditioning unit includes an amplifier circuit, a filter circuit, an analog-to-digital circuit, and an isolation circuit. The Beidou signal conditioning unit includes a radio frequency front-end circuit, a digital signal processing circuit, and a positioning calculation circuit. The image signal conditioning unit includes an image sensor interface and an analog-to-digital conversion circuit.

[0033] Please see Figure 3The equipment housing 1 is equipped with strain sensor 14, displacement sensor 15, tilt sensor 16, seepage pressure sensor 17, temperature sensor 18, rainfall sensor 19, monitoring camera 20, and Beidou positioning device 21. These components are located on the outside of the equipment housing 1. Strain sensor 14 and temperature sensor 18 are located inside the dam. Displacement sensor 15 is located on the centerline of the dam crest and on the upstream and downstream faces of the dam body. Tilt sensor 16 is located on the upstream and downstream faces of the dam body, on the left and right banks, at the turning points of the dam body, and at the joints of the dam sections. Seepage pressure sensor 17 is located on the dam foundation, dam shoulder, and inside the dam body. Rainfall sensor 19 is located on the slope of the dam. Monitoring camera 20 is located on both sides of the dam crest and on the upstream and downstream faces of the dam. Beidou positioning device 21 is located on the centerline of the dam crest, on the upstream and downstream slopes, on the dam shoulder, and on the dam body. Strain sensors 14 monitor dam deformation based on the piezoresistive effect of strain gauges or the photoelastic effect of optical fibers. When the dam body deforms under external force, the strain at the corresponding location is determined by measuring the resistance value of the strain gauge or the change in the reflected wavelength of the fiber optic grating. Suitable product models include OS3150, OS3155, and SG-YB-DM-1. Displacement sensors 15 determine the spatial displacement of the dam body. Suitable product models include HDM-L. Tilt sensors 16 detect changes in the tilt angle of the dam body through internal sensitive elements and convert them into electrical signals. Suitable product models include XW-TS1130 and ELT-15. Seepage pressure sensors 17 reflect seepage by measuring changes in pore water pressure inside the dam body. Suitable product models include TJ-20, TJ-30, and AR-SS-SYJ06. Temperature sensors 18 detect changes in temperature inside the dam body. Suitable product models include NTC0805J6K8. Rainfall sensor 19 detects precipitation and intensity; suitable models include CG-04-D1. Monitoring camera 20 is used to capture images of the dam surface, upstream and downstream reservoir slopes, and other key components; suitable models include ZF-IPC-08K11. Beidou positioning device 21 is used to acquire information on the positional changes of key monitoring points on the dam and upstream and downstream reservoir slopes in three-dimensional space, such as horizontal displacement, vertical displacement, and settlement, thereby enabling real-time monitoring of structural deformation; suitable models include TN521.

[0034] Working principle of signal conditioning device 13:

[0035] The amplifier circuit is connected to the output of the sensor and uses electronic components such as transistors and operational amplifiers to amplify the weak signal output by the sensor. The filter circuit is connected to the amplifier circuit and uses a built-in filter to remove noise mixed into the sensor signal during acquisition and transmission. The analog-to-digital circuit is connected to the filter circuit and is used to convert the amplified and filtered analog signal into a digital signal. The isolation circuit is set at different positions in the signal transmission path, such as between the sensor and the amplifier circuit or between the amplifier circuit and the filter circuit, to cut off the electrical connection in the signal transmission path and prevent common-mode interference and ground loop interference from affecting the signal.

[0036] The radio frequency (RF) front-end circuit connects to the antenna and is used to amplify, filter, and down-convert the RF signals received by the antenna from the BeiDou satellites, converting high-frequency satellite signals into intermediate-frequency (IF) signals. The digital signal processing circuit connects to the RF front-end circuit and is used to digitize the IF signals, including decoding, demodulation, and filtering, to extract information such as the satellite's position, velocity, and time. The positioning calculation circuit connects to the digital signal processing circuit and is used to determine the latitude and longitude coordinates corresponding to the positioning based on the satellite data output by the digital signal processing circuit.

[0037] The image sensor interface is connected to the surveillance camera 20, which receives weak current signals through a built-in buffer amplifier and converts them into voltage signals; the analog-to-digital converter circuit is connected to the voltage signal at the image sensor interface and converts it into digital format.

[0038] Various sensors collect data and transmit it to the equipment housing 1 via signal conditioning device 13. The display screen 2 shows the data collected by the sensors, and control and adjustment operations are performed via control buttons 3. Simultaneously, if an anomaly is detected in the pumped storage power station dam, an alarm speaker 4 can be used to provide an alarm, and the alarm signal can be transmitted to the outside world. By amplifying weak signals to ensure accurate acquisition and filtering to remove noise interference, the accuracy and reliability of the data are greatly improved. Unified processing and conversion of sensor signals of different types and interface standards ensure smooth access to the system for comprehensive and stable data acquisition. Attenuation and optimization processing effectively improve monitoring accuracy within a suitable range, meeting the high-precision monitoring requirements of the dam. Signal isolation and other anti-interference measures reduce the impact of external factors on the signal, ensuring long-term stable operation of the system and providing continuous and accurate data support for dam safety monitoring, effectively guaranteeing the safety and stability of the dam and the efficient and scientific operation of the power station.

[0039] Please see Figure 1 , Figure 2The lower front of the device housing 1 has a storage cavity 5, and a pull-out drawer 6 is slidably connected inside the storage cavity 5. Placement slots 7 are evenly distributed on the top of the pull-out drawer 6. Some components used during monitoring, such as sensors, can be placed in the placement slots 7, and the pull-out drawer 6 can be retracted into the storage cavity 5. This facilitates storage and allows for easy removal and replacement. A drive motor 8 is mounted on the upper surface of the device housing 1, and limit side grooves 9 are formed on both sides of the device housing 1. A threaded screw 10 is rotatably connected to the inner cavity of the limit side groove 9, and the threaded screw 10 is coaxially connected to the drive motor 8. A sliding block 11 is fitted onto the surface of the threaded screw 10, and a protective outer plate 12 is connected to the outside of the sliding block 11, with the protective outer plate 12 fitting snugly against the front of the device housing 1. The drive motor 8 drives the threaded screw 10 to rotate in the limiting side groove 9 on the equipment housing 1, while the sliding block 11 drives the protective outer plate 12 to move up and down along the inner wall of the limiting side groove 9 according to the rotation of the threaded screw 10. This not only protects the equipment housing 1, but also facilitates disassembly.

[0040] Please see Figure 3 Strain sensors 14 are arranged in a grid pattern or along key stress directions at certain intervals on the dam, and displacement sensors 15 include tension wire displacement sensors, a total station automated monitoring prism, and a laser displacement sensor. The tension wire displacement sensors 15 use taut steel wires as a reference line. When the dam body undergoes horizontal displacement, the relative displacement between the measuring points fixed on the dam body and the steel wire is measured to determine the horizontal displacement of the dam body. The total station automated monitoring prism is observed by the total station, and the spatial displacement of the dam body is determined based on the changes in the prism's three-dimensional coordinates. Tilt sensors 16 are installed at certain intervals on the dam, and pressure sensors 17 are installed at different depths and planar positions on the dam at certain intervals. This allows the tilt sensors 16 and pressure sensors 17 to capture tilt and pressure changes in a timely manner, thereby ensuring monitoring effectiveness. The Beidou positioning device 21 is installed on the dam surface via a fixed bracket, and the device housing 1 can be fixed by ground anchors. The Beidou positioning device 21 can be easily installed at different locations on the dam using a fixed bracket, thereby ensuring the stability of the Beidou positioning device 21 during use.

[0041] This solution utilizes strain sensors 14, based on the piezoresistive effect of strain gauges or the photoelastic effect of optical fibers, to monitor the dam's deformation under external forces. When the dam deforms, the strain at the corresponding location is determined by measuring the resistance value of the strain gauge or the change in the reflected wavelength of the fiber optic grating. Displacement sensors 15 determine the spatial displacement of the dam. Tilt sensors 16 detect changes in the dam's tilt angle using internal sensitive elements and convert them into electrical signals. Pressure sensors 17 measure changes in pore water pressure within the dam to reflect seepage. Temperature sensors 18 detect changes in the internal temperature of the dam. Rainfall sensors 19 detect rainfall amount and intensity. Monitoring cameras 20 capture images of the dam surface and upstream and downstream reservoir slopes. A Beidou positioning device 21 acquires information on the positional changes of key monitoring points on the dam and upstream and downstream reservoir slopes in three-dimensional space, such as horizontal displacement, vertical displacement, and settlement, thereby enabling real-time monitoring of structural deformation.

[0042] The amplification circuit in the signal conditioning device 13 is connected to the output of the sensor. It uses an amplification circuit composed of electronic components such as transistors and operational amplifiers to amplify the weak signal output by the sensor. The filter circuit is connected to the amplification circuit and removes noise mixed in during the acquisition and transmission of the sensor signal through a built-in filter. The analog-to-digital circuit is connected to the filter circuit and is used to convert the amplified and filtered analog signal into a digital signal. The isolation circuit is set at different positions in the signal transmission path, such as between the sensor and the amplification circuit or between the amplification circuit and the filter circuit, to cut off the electrical connection in the signal transmission path and prevent common-mode interference and ground loop interference from affecting the signal.

[0043] The radio frequency (RF) front-end circuit connects to the antenna and is used to amplify, filter, and down-convert the RF signals received by the antenna from the BeiDou satellites, converting high-frequency satellite signals into intermediate-frequency (IF) signals. The digital signal processing circuit connects to the RF front-end circuit and is used to digitize the IF signals, including decoding, demodulation, and filtering, to extract information such as the satellite's position, velocity, and time. The positioning calculation circuit connects to the digital signal processing circuit and is used to determine the latitude and longitude coordinates corresponding to the positioning based on the satellite data output by the digital signal processing circuit.

[0044] The image sensor interface is connected to the surveillance camera 20, which receives weak current signals through a built-in buffer amplifier and converts them into voltage signals; the analog-to-digital converter circuit is connected to the voltage signal at the image sensor interface and converts it into digital format.

[0045] Various sensors collect data and transmit it to the inside of the equipment housing 1 through the signal conditioning device 13. The display screen 2 shows the data collected by various sensors, and the control buttons 3 are used for control and adjustment. At the same time, if an abnormality is detected in the pumped storage power station dam, the alarm speaker 4 can be used to provide an alarm reminder, and the alarm signal can be sent to the outside world.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An online safety monitoring and early warning device for pumped storage power station dams, characterized in that, include: The equipment housing (1) and the display screen (2) are provided on the front of the equipment housing (1), and the lower part of the display screen (2) is provided with a control button (3), and an alarm speaker (4) is installed at the lower part of the control button (3); The signal conditioning device (13) is located on the top of the device housing (1), and the signal conditioning device (13) includes a sensor signal conditioning unit, a Beidou signal conditioning unit, and an image signal conditioning unit. The sensor signal conditioning unit includes an amplification circuit, a filtering circuit, an analog-to-digital circuit, and an isolation circuit. The Beidou signal conditioning unit includes a radio frequency front-end circuit, a digital signal processing circuit, and a positioning calculation circuit. The image signal conditioning unit includes an image sensor interface and an analog-to-digital conversion circuit. The strain sensor (14), displacement sensor (15), tilt sensor (16), seepage pressure sensor (17), temperature sensor (18), rainfall sensor (19), monitoring camera (20), and Beidou positioning device (21) are installed outside the equipment housing (1). The strain sensor (14) and temperature sensor (18) are installed inside the dam. The displacement sensor (15) is installed on the center line of the dam crest and on the upstream and downstream surfaces of the dam body. The tilt sensor (16) is installed on the upstream and downstream surfaces of the dam body, the left and right banks, the turning points of the dam body, and the joints of the dam sections. The seepage pressure sensor (17) is installed on the dam foundation, the dam shoulder, and inside the dam body. The rainfall sensor (19) is installed on the slope of the dam. The monitoring camera (20) is installed on both sides of the dam crest and on the upstream and downstream dam surfaces. The Beidou positioning device (21) is installed on the center line of the dam crest, the upstream and downstream slope surfaces, the dam shoulder, and the dam body.

2. The online safety monitoring and early warning device for pumped storage power station dams according to claim 1, characterized in that: The device housing (1) has a storage cavity (5) on the lower front side, and a pull-out drawer (6) is slidably connected inside the storage cavity (5), and the top of the pull-out drawer (6) has evenly spaced slots (7).

3. The online safety monitoring and early warning device for pumped storage power station dams according to claim 1, characterized in that: A drive motor (8) is installed on the upper surface of the equipment housing (1), and a limiting side groove (9) is opened on both sides of the equipment housing (1). A threaded screw (10) is rotatably connected to the inner cavity of the limiting side groove (9), and the threaded screw (10) is coaxially connected to the drive motor (8). A sliding block (11) is sleeved on the surface of the threaded screw (10), and a protective outer plate (12) is connected to the outside of the sliding block (11). The protective outer plate (12) is in contact with the front of the equipment housing (1).

4. The online safety monitoring and early warning device for a pumped storage power station dam according to claim 1, characterized in that: The strain sensors (14) are arranged in a grid pattern or along the key force direction at a certain interval on the dam, and the displacement sensors (15) include tension wire displacement sensors, total station automated monitoring prisms and laser displacement sensors.

5. The online safety monitoring and early warning device for pumped storage power station dams according to claim 1, characterized in that: The tilt sensor (16) is installed at a certain distance on the dam, and the seepage pressure sensor (17) is installed at different depths and planar positions on the dam at a certain interval.

6. The online safety monitoring and early warning device for a pumped storage power station dam according to claim 1, characterized in that: The Beidou positioning device (21) is installed on the surface of the dam by a fixed bracket, and the equipment housing (1) is fixed by a ground anchor.

Images