Pump station flap valve state monitoring system

Abstract

The invention provides a pump station flap valve state monitoring system, which relates to the technical field of pump station flap valves, and comprises the following steps: acquiring basic data and ultrasonic data of a flap valve and an ultrasonic transceiver; the basic data and the ultrasonic data are processed through an empirical formula, and the distance l from an ultrasonic transmitting point to a flap valve reflecting point is obtained; based on the basic data and the ultrasonic data, establishing a correction method for the distance l from the ultrasonic transmitting point to the flap valve reflecting point; based on the basic data and the corrected distance l from the ultrasonic transmitting point to the flap valve reflecting point, the flap valve state opening # imgabs0 # is obtained according to the angle relation, the basic data and the ultrasonic data are obtained according to the gate working bridge and the ultrasonic transceiver, the distance from the ultrasonic transmitting point to the flap valve reflecting point is used as a correction model, the flap valve state opening is obtained, and the flap valve state opening # imgabs0 # is obtained. The technical problem that the specific state of the existing pump station flap valve is difficult to observe is solved.

Description

Technical Field

[0001] The invention relates to the technical field of pump station flap doors, and in particular to a pump station flap door status monitoring system. Background Art

[0002] Pump station flap valve usually refers to a one-way valve installed at the outlet of the pump station. Its main function is to control the direction of water flow and prevent water backflow. This valve is very important in the pump station because it can ensure the efficient operation of the pump station and prevent equipment damage or reduced efficiency caused by water backflow.

[0003] Pump station units basically cut off the water flow by means of flap gates, vacuum breaking valves or fast gates. Under normal circumstances, flap gates are mostly submerged in water, making them difficult to observe and measure. When the unit is running, the flap gate opening is unknown, and when the unit is shut down, it is difficult to find out whether the flap gate is damaged or detached. This is a common safety hazard in large, medium and small pump stations.

[0004] At present, the waterproof and corrosion resistance of underwater equipment are required to be high. To address these problems, special monitoring technologies and equipment are needed, such as the use of waterproof camera systems, to ensure that the opening angle and operating status of the flap gate can be accurately monitored. The problems encountered in underwater pump station flap gate monitoring include obstructed vision, complex underwater environment, water pressure influence, and limited performance of monitoring equipment. These problems may make it difficult to monitor the angle of the pump station flap gate, affecting the operating efficiency and safety of the pump station. The underwater environment will complicate the installation and maintenance of monitoring equipment. At the same time, large water flow disturbances or splashes will be generated during the opening or closing process, which will temporarily affect the clarity and field of view of the underwater camera. Poor underwater vision will also affect the effectiveness of monitoring methods such as video surveillance. The gate opening value range obtained from various parameters has a large deviation, which is not conducive to monitoring the flap gate status.

[0005] The present invention is mainly used to solve the flap door monitoring problem, and displays the dynamic information of the flap door in the system, which is convenient for the on-duty personnel to observe and ensure the safe operation of the pump station. Summary of the invention

[0006] The present invention provides a pump station flap door status monitoring system, which solves the technical problem that when using a waterproof camera to shoot the pump station flap door, the camera's line of sight is blocked by water flow disturbance, resulting in inaccurate flap door status detection.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A method for monitoring the status of a pump station flap door, comprising the following steps:

[0009] S1: Obtain the basic data and ultrasonic data of the flap door and ultrasonic transceiver; wherein the basic data includes the horizontal distance l from the flap door installation point to the ultrasonic emission point1 ; Height from flap door installation point to working bridge h 2 ; The angle θ between the emission direction of the ultrasonic emission point and the working bridge; The vertical height from the working bridge to the water surface m′; The ultrasonic data includes the round-trip time t from the ultrasonic emission point to the flap door;

[0010] S2: Process the basic data and ultrasonic data by empirical formula to obtain the distance l from the ultrasonic emission point to the door reflection point;

[0011] S3: A correction method for the distance l from the ultrasonic emission point to the door reflection point is established based on the basic data and ultrasonic data. The corrected l is:

[0012]

[0013] Wherein, m′ is the vertical height from the working bridge to the water surface; T is the water temperature;

[0014] S4: Based on the basic data and the corrected distance l from the ultrasonic emission point to the flap door reflection point, the flap door state opening is obtained from the angle relationship Door opening The calculation formula is:

[0015]

[0016] Preferably, in step S1, the ultrasonic transceiver includes a transmitting device and a receiving sensor installed on the working bridge.

[0017] Preferably, in step S2, the empirical formula includes:

[0018]

[0019] Where v is the ultrasonic speed.

[0020] Preferably, the correction method for establishing the distance l from the ultrasonic emission point to the door reflection point based on the basic data and the ultrasonic data specifically includes:

[0021] Based on the angle relationship of the basic data, the calculation formula for the propagation distance l' of ultrasonic waves in the air is obtained as follows:

[0022] l′=m′ / sinθ;

[0023] Based on the sound velocity v″ of ultrasound in water and the propagation time t″ of ultrasound in water, the calculation formula for the propagation distance l″ of ultrasound in water is obtained as follows:

[0024] l″=v″*t″ / 2;

[0025] l is modified according to the relationship l=l′+l″;

[0026] The distance l from the ultrasonic emission point to the door reflection point includes the ultrasonic propagation distance l′ in the air and the ultrasonic propagation distance l″ in the water.

[0027] The ultrasonic round trip time t includes the ultrasonic wave propagation time t′ in the air and the ultrasonic wave propagation time t″ in the water;

[0028] The ultrasonic sound speed v includes the ultrasonic sound speed v′ in air and the ultrasonic sound speed v″ in water.

[0029] Preferably, in step S4, it specifically includes:

[0030] According to the distance l from the ultrasonic emission point to the door reflection point and the angle θ between the emission direction of the ultrasonic emission point and the working bridge, the horizontal distance l from the ultrasonic wave to the door reflection point is obtained. 2 ;

[0031] l 2 = l * cos θ;

[0032] Based on the horizontal distance l from the ultrasonic wave to the reflection point of the door 2 The horizontal distance from the flap door installation point to the ultrasonic emission point l 1 Obtain the horizontal distance l from the ultrasonic reflection point to the flap door installation point 3 ;

[0033] l 3 = l 1 -l*cosθ;

[0034] Based on the height h from the flap door installation point to the working bridge 2 The vertical distance h from the launch point to the reflection point of the door 1 Obtain the height h from the flap door installation point to the flap door launch point 3 ;

[0035] h 1 = l * sinθ;

[0036] Among them, h 1 It is the vertical distance from the launch point to the reflection point of the flap door;

[0037] h 3 =l*sinθ-h 2 ;

[0038] Combined with the horizontal distance l from the ultrasonic reflection point to the flap door installation point 3 The height h from the flap door installation point to the flap door launch point 3 The angle relationship between them is used to obtain the door opening degree

[0039] Preferably, if at least one of the ultrasonic data, basic data, and the distance l from the ultrasonic emission point to the door reflection point is abnormal, an alarm signal is issued at the working bridge.

[0040] The present application also discloses a pump station flap door status monitoring system, which is applied to the above pump station flap door status monitoring method, and includes a data module, a processing module and an output module;

[0041] The data module is used to obtain basic data and ultrasonic data, and send the basic data and ultrasonic data to the processing module;

[0042] After receiving the basic data and ultrasonic data, the processing module corrects and processes the data to obtain the door opening status. And the basic data, ultrasonic data and flap door status opening Send to output module;

[0043] The output module receives basic data, ultrasonic data and door status opening Finally, based on the above data display, simulation and monitoring.

[0044] Preferably, the data module includes a preset module and an ultrasonic module, wherein the preset module is used to obtain basic data, and the ultrasonic module is used to detect the round-trip time t from the ultrasonic emission point to the door in real time.

[0045] Preferably, the processing module includes a receiving module, a data correction module and a flap door opening calculation module, the data receiving module is used to receive the basic data and ultrasonic data sent by the data module, and obtain the distance l from the ultrasonic emission point to the flap door reflection point based on the basic data and the ultrasonic data; the data correction module corrects the distance l from the ultrasonic emission point to the flap door reflection point based on the basic data and the ultrasonic data; the flap door opening calculation module obtains the flap door state opening based on the basic data and the corrected distance l from the ultrasonic emission point to the flap door reflection point

[0046] Preferably, the output module includes an output processing module and a display module, a simulation module and an alarm module connected to the output processing module, and the display module is used to display the door opening status on the working bridge. The simulation module is used to calculate the basic data, ultrasonic data, the distance l from the ultrasonic emission point to the door reflection point, and the door opening status. To simulate the scene; the alarm module is used to monitor basic data, ultrasonic data, the distance l from the ultrasonic emission point to the door reflection point, and the door status opening Whether it exceeds the preset value range.

[0047] It can be seen from the above technical solutions that the present invention has the following beneficial effects:

[0048] The present invention adopts an ultrasonic transceiver to receive ultrasonic data emitted to the pump station flap gate, obtains basic data after installation according to the emission point of the ultrasonic transceiver, and obtains the distance from the ultrasonic emission point to the flap gate reflection point after combined processing of the basic data and the ultrasonic data. A calculation formula is established through the basic data and the distance from the ultrasonic emission point to the flap gate reflection point, and a correction model is made using the distance from the ultrasonic emission point to the flap gate reflection point. Different water temperatures and different ultrasonic speeds in air and water are used to make corresponding adjustments to the calculation formula to further ensure the accuracy of the flap gate state opening. The flap gate state opening can be obtained by only the ultrasonic round-trip time, so as to facilitate real-time detection by the staff on the gate working bridge and avoid obstruction of the sight of the pump station flap gate underwater, which makes it difficult to observe the specific state of the pump station flap gate and difficult to perform subsequent operations.

[0049] The present invention establishes an accurate and efficient flap door status monitoring model based on ultrasonic data, monitors the flap door status, and continuously corrects the flap door status, so as to accurately describe the flap door status, and then monitors the dynamic conditions of each flap door in the water when it is turned on and running, and timely warns of sudden detachment and the like to ensure safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is a schematic diagram of the process structure of the door flap state monitoring of the present invention;

[0051] Figure 2 It is a structural schematic diagram of the ultrasonic transceiver and the pump station flap door of the present invention;

[0052] Figure 3 It is a schematic diagram of the structure between the flap door installation point and the ultrasonic transceiver on the working bridge of the present invention;

[0053] Figure 4 It is a structural schematic diagram of the flap door installation point, working bridge and water level elevation of the present invention;

[0054] Figure 5 It is a preliminary flow chart of the door flap state monitoring system of the present invention;

[0055] Figure 6 It is a schematic diagram of the flow chart of the module connection of the flap door status monitoring system of the present invention. DETAILED DESCRIPTION

[0056] A preferred embodiment of the present invention is described in detail below with reference to the accompanying drawings.

[0057] Ultrasonic measurement technology is a distance measurement method that is not affected by the detection environment and does not require contact. It can accurately measure distances in dark or vulnerable environments. Moreover, ultrasonic waves are short waves with slow sound speed and slow energy decay during propagation. They have strong directionality and are conducive to echo detection and identification. In addition, the ultrasonic ranging system is controlled by a single-chip microcomputer, has a simple structure, low production cost, and is widely used in various related fields. The present invention utilizes the characteristics of ultrasonic waves to form ultrasonic state monitoring technology. Specifically, it mainly applies the application of ultrasonic waves in distance measurement, combined with the feedback of the state behavior of the monitored object, to monitor the state of the target object.

[0058] At present, the application of ultrasonic ranging technology in the fields of automobiles and the like is the most similar to the present invention, and there is a corresponding application in the master's thesis. Its specific implementation scheme is as follows: when the single-chip microcomputer sends an ultrasonic transmission instruction, the system enters the transmission state, and the pulse voltage signal is output through the transmission circuit to drive the ultrasonic transducer, and the voltage signal is converted into ultrasonic vibration by using the inverse piezoelectric effect of the transducer, and propagated into the air to complete the transmission of the ultrasonic wave. When the ultrasonic wave propagation encounters an obstacle, it will be reflected back. Since the ultrasonic wave will be weakened by various factors and environmental interference during the transmission process, the recovered signal is relatively weak and needs to be amplified and filtered for signal processing. Finally, the echo signal is transmitted to the single-chip microcomputer via IO and it is judged that a valid signal is received. At this time, the time taken from the ultrasonic wave sending to the receiving is calculated inside the single-chip microcomputer, and then the ranging can be completed according to the speed distance formula.

[0059] The water outflow of pump station units is basically cut off by flap doors, vacuum breaking valves or fast doors. Due to design, materials, manufacturing and equipment fatigue, they are often damaged or even fall off, seriously affecting the safe operation of the electromechanical equipment of the pump station. Under normal circumstances, the flap doors are mostly submerged in water and difficult to observe and measure. The flap door opening is unknown when the unit is running, and it is difficult to find out whether the flap door is damaged or falls off when the unit is shut down. This is a common safety hazard in large, medium and small pump stations. The present invention is mainly to solve the problem of flap door monitoring, and display the dynamic information of the flap door in the system, which is convenient for the on-duty personnel to observe and ensure the safe operation of the pump station; the specific technical scheme is as follows:

[0060] like Figure 1 and Figure 2 As shown, a method for monitoring the status of a pump station flap door comprises the following steps:

[0061] S1: Install an ultrasonic transmitter and a receiving sensor, i.e., an ultrasonic transceiver, on the concrete wall on one side of the working bridge and the gate for the propagation and acquisition of ultrasonic signals; obtain the basic data of the flap gate and the ultrasonic transceiver in advance, the ultrasonic emission point of the ultrasonic transceiver emits ultrasonic waves to the flap gate, and obtains ultrasonic data through the ultrasonic waves reflected by the flap gate, wherein the basic data includes the horizontal distance l from the flap gate installation point to the ultrasonic emission point 1 ; Height from flap door installation point to working bridge h 2 ; The angle θ between the emission direction of the ultrasonic emission point and the working bridge; The vertical height from the working bridge to the water surface m′; The ultrasonic data includes the round-trip time t from the ultrasonic emission point to the flap door;

[0062] Specifically, the transmitting device and the receiving sensor face the pump station flap door, which is a fixed ultrasonic transmitting point. The transmitting device sends ultrasonic waves toward the pump station flap door in real time, so that the receiving sensor receives the ultrasonic waves reflected by the flap door. When the ultrasonic wave is transmitted, it is similar to the form of water waves. Therefore, after the ultrasonic wave is transmitted, it can return to the original contact point of the pump body flap door, so that the receiving sensor can receive the ultrasonic wave of the transmitting device.

[0063] Horizontal distance from the flap door installation point to the launch device l 1 The water temperature T is the basic data. The water temperature unit is Celsius. Some basic data can be detected by a single artificial test, that is, the data is a constant after the test, such as h 2 , θ and l 1 ; Another part of the basic data needs to be detected in real time periodically to ensure the values ​​under different conditions, such as m′ and T. m′ can be calculated based on the difference between the installation elevation of the launch point and the water level elevation. A water level gauge is installed on the working bridge, and the water level elevation is uploaded by the water level gauge in real time. The data can be uploaded in a cycle of 5 seconds. T uses an infrared thermometer, which is non-contact and can directly obtain the water temperature. In addition, in normal application, the water temperature does not change much, so it is sufficient to record and input the water temperature once every 8 hours. You can also use a handheld thermometer and measure at regular intervals, but from the perspective of simplicity, it is preferred to use an infrared thermometer.

[0064] S2: The model obtains the distance l from the ultrasonic emission point to the door reflection point based on the basic data and ultrasonic data; where the ultrasonic sound speed v and v are conventional values ​​and are calculated using the formula

[0065]

[0066] S3: establishing a correction method for the distance l from the ultrasonic emission point to the door reflection point based on the basic data and ultrasonic data;

[0067] Since the speed of ultrasound in different media is different, it is very easy to cause measurement errors. The value of is more accurate. In addition, through the correction Get a more accurate water flow rate of the flap gate, so as to realize the real-time verification of the pumping flow of the pump station and achieve the goal of monitoring the operation efficiency of the pump station. (Under normal circumstances, the pumping flow of the pump station is the same as the water flow rate of the flap gate) Comprehensively consider the influence of temperature and medium factors. Correct the calculation of the distance l from the ultrasonic emission point to the flap gate reflection point, as shown in the schematic diagram Figure 4 The entire correction method is as follows:

[0068] The sound speed of ultrasound in water and air is based on the empirical formula to construct the correction model. The sound speed of ultrasound v includes the sound speed of ultrasound in air v′ and the sound speed of ultrasound in water v″. The sound speed of ultrasound in water v″, T is the temperature of water, and the calculation formula of v″ is:

[0069] v″=1402.1+4.95T-0.055T 2 +0.00029T 3

[0070] The speed of sound of ultrasonic wave in air is v', and the calculation formula of v' is:

[0071] v′=331.4+0.6T

[0072] The distance l from the ultrasonic emission point to the door reflection point includes the ultrasonic propagation distance l' in the air and the ultrasonic propagation distance l" in the water, and the ultrasonic round trip time t includes the ultrasonic propagation time t' in the air and the ultrasonic propagation time t", then:

[0073] l=l′+l′′

[0074] t=t′+t′′

[0075] according to Figure 4 As shown, the calculation formula of l′ is obtained by using trigonometric functions:

[0076] l′=m′ / sinθ

[0077] According to the sound velocity v' of ultrasonic wave in air, the calculation formula of l' is:

[0078]

[0079] Based on the sound speed v″ of ultrasound in water, the propagation distance l″ of ultrasound in water is obtained

[0080] l″=v″*t″ / 2

[0081] Based on the relationship between the propagation distance l' of ultrasonic waves in air and the propagation distance l" of ultrasonic waves in water and the distance l from the ultrasonic wave emission point to the reflection point of the flap door, we have

[0082] l=l'+l"=m' / sinθ+v"*t" / 2

[0083] Substituting the above into the equation, we can get the door opening degree. The calculation formula of the correction model is:

[0084]

[0085] Substitute the corrected l into the flap door state opening In the calculation formula, the obtained door opening degree is Correction, so as to more accurately obtain the real-time status of the pump station flap door. In the calculation formula of the correction model, it is only necessary to obtain the ultrasonic round-trip time t and detect the water temperature in real time to obtain the water temperature T. The rest are the values ​​measured after installation. The entire model requires fewer detection values, and the flap door status opening The detection value is more accurate.

[0086] S4: Obtain the door opening status based on the basic data and the distance l from the ultrasonic emission point to the door reflection point

[0087] Specifically, the horizontal distance l from the ultrasonic wave to the reflection point of the door 2 , horizontal distance from ultrasonic reflection point to flap door installation point l 3 , the vertical distance h from the launch point to the reflection point of the door 1 , the height from the flap door installation point to the flap door launching point h 3 The state monitoring calculation principle diagram is as follows: Figure 3 As shown, the door opening The angle relationship is as follows:

[0088] The vertical distance h from the launch point to the reflection point of the door is obtained by the sine function 1 , and calculate the height h from the flap door installation point to the flap door launch point 3 :

[0089]

[0090] h 3 =h 1 -h 2 =l*sinθ-h 2

[0091] The horizontal distance l from the ultrasonic wave to the reflection point of the door is obtained by the cosine function 2 , and calculate the horizontal distance l from the ultrasonic reflection point to the flap door installation point3 :

[0092]

[0093] l 3 = l 1 -l 2 = l 1 -l*cosθ

[0094] The opening degree of the flap door can be obtained by the inverse tangent function

[0095]

[0096] Therefore, the above-mentioned door opening It is possible to monitor the status of the pump station flap door in real time, and only the ultrasonic round trip time t needs to be considered to obtain The value of makes the detection method simpler. At the same time, combined with the correction model in the above step S3, the door opening degree can be obtained more accurately. status.

[0097] Based on basic data, ultrasonic data, the distance from the ultrasonic emission point to the flap door reflection point and the flap door status opening Construct a 3D display model of the working bridge, reconstruct the hydraulic structure in proportion, and complete the 3D modeling by combining on-site shooting to obtain the building texture; at the same time, simulation or a combination of the two can also be used. Specifically, use Unreal Engine such as UE to access the water temperature T, the vertical height m′ from the working bridge to the water surface, and the model calculation data, etc., to display in the 3D model, and simulate the movement of the flap door in the water according to the change of the flap door opening state.

[0098] This three-dimensional 3D modeling can provide a realistic virtual three-dimensional scene. At the same time, CFD (computational fluid dynamics) software is used to perform numerical simulation on the flow state at the flap gate outlet, and the corresponding water flow rate of the flap gate can be calculated. The corresponding water flow rate of the flap gate is mainly obtained by multiplying the water flow velocity and the vertical water flow cross-sectional area through the flap gate. The water flow velocity of the flap gate is generally taken as the flow velocity in the upstream flow channel of the flap gate. The water flow cross-sectional area of ​​the flap gate is the product of the flap gate area and the flap gate angle. The product of; the pumping flow of the pumping station can be verified by the corrected flap door state opening, and then the operating efficiency of the pumping station can be monitored.

[0099] The above three-dimensional display simulation method enables managers and staff to intuitively observe the various parts of the pump station flap door. It is applied to remote monitoring and management of the pump station, and remote command and dispatch can be achieved through network access to the virtual three-dimensional display platform. In addition, the three-dimensional display model can use BIM modeling technology to establish a visual display model including the working bridge and flap door, and integrate the real-time calculated data with the three-dimensional model, which can intuitively and realistically display the status of the flap door.

[0100] If at least one of the ultrasonic data, basic data, and the distance monitoring from the ultrasonic emission point to the flapping gate reflection point is abnormal, an alarm signal will be issued at the working bridge, and a disposal plan will be prepared in advance. Among them, the ultrasonic round-trip time t is far beyond the original data range error, and the specific error range is set by the personnel in this field; the basic data is abnormal, there are numerical detection errors, input numerical errors; or l exceeds the original data range error. During the above process, whether it is a detection problem or the data is not recorded correctly, the storage location is wrong, the data format does not match, or the data access permission problem, the working bridge can send an alarm signal through a buzzer or an audible and visual alarm to remind the staff that there is a problem with the acquisition of data and timely maintenance is required to ensure real-time monitoring of the pump station flapping gate.

[0101] like Figure 5 and Figure 6 As shown, a pump station flap door status monitoring system, which applies the above-mentioned pump station flap door status monitoring method, includes a data module, a processing module and an output module; wherein the data module is used to obtain basic data and ultrasonic data, and send the basic data and ultrasonic data to the processing module; after receiving the basic data and ultrasonic data, the processing module corrects and processes the data to obtain the flap door status opening And the basic data, ultrasonic data and flap door status opening Send to the output module; the output module receives basic data, ultrasonic data and flap door status opening Finally, based on the above data display, simulation and monitoring.

[0102] Specifically, the data module includes a preset module and an ultrasonic module. After detecting the basic data, the basic data is sent to the preset module. The ultrasonic module is used to detect the round-trip time t from the ultrasonic emission point to the door in real time. The preset module and the ultrasonic module send the basic data and the ultrasonic data to the processing module respectively.

[0103] The processing module includes a receiving module, a data correction module and a flap door opening calculation module. The receiving module is used to receive the basic data and ultrasonic data sent by the data module, and obtain the distance l from the ultrasonic emission point to the flap door reflection point based on the basic data and the ultrasonic data; the data correction module corrects the distance l from the ultrasonic emission point to the flap door reflection point based on the basic data and the ultrasonic data, and the correction method is as above; the flap door opening calculation module obtains the flap door state opening based on the basic data and the corrected distance l from the ultrasonic emission point to the flap door reflection point The calculation method is as above.

[0104] The output module includes an output processing module and a display module, a simulation module and an alarm module connected to the output processing module. The display module is used to display the state of the flap door on the working bridge. If a display or screen is used to indicate the door opening status The simulation module is used to calculate the basic data, ultrasonic data, the distance l from the ultrasonic emission point to the door reflection point, and the door opening status. To simulate the scene, the specific simulation can be done by using 3D software or simulation; the alarm module is used to monitor basic data, ultrasonic data, the distance l from the ultrasonic emission point to the door reflection point, and the door status opening Whether it exceeds the preset numerical range, when at least one of the ultrasonic data, basic data, and the distance monitoring from the ultrasonic emission point to the flapping door reflection point is abnormal, the alarm module can be activated to indicate that there is an abnormality in the flapping door of the surface pump station.

[0105] In view of the current difficulty in monitoring the status of flap gates, the present invention uses ultrasonic measurement technology and combines the working status of flap gates to creatively establish a flap gate status monitoring model, which transforms the unknown status of underwater flap gates into flap gate status monitoring that can be accurate to the angle and flap gate water flow monitoring at different openings, so that flap gate status information can be controlled in real time, and problems can be warned in time, so that emergency measures can be prepared in advance to ensure the safe operation of the pump station. In addition, an ultrasonic measurement and correction model under different media and temperature conditions is established to ensure the accuracy of the measurement and provide a reference basis for large-scale measurements.

[0106] The above-described embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A method for monitoring the status of a pump station flap door, characterized in that: The steps include: S1: Obtain basic data and ultrasonic data of the flap door and ultrasonic transceiver; the basic data includes the horizontal distance l1 from the flap door installation point to the ultrasonic emission point; the height h2 from the flap door installation point to the working bridge; the angle θ between the emission direction of the ultrasonic emission point and the working bridge; the vertical height m from the working bridge to the water surface ′ ; Ultrasonic data includes the round trip time t from the ultrasonic emission point to the flap door; S2: Process the basic data and ultrasonic data by empirical formula to obtain the distance l from the ultrasonic emission point to the door reflection point; S3: A correction method for the distance l from the ultrasonic emission point to the door reflection point is established based on the basic data and ultrasonic data. The corrected l is: Wherein, m′ is the vertical height from the working bridge to the water surface; T is the water temperature; S4: Based on the basic data and the corrected distance l from the ultrasonic emission point to the flap door reflection point, the flap door state opening is obtained from the angle relationship Door opening The calculation formula is:

2. The method for monitoring the flap door status of a pump station according to claim 1, characterized in that: In step S1, the ultrasonic transceiver includes a transmitting device and a receiving sensor installed on a working bridge.

3. The method for monitoring the status of a pump station flap door according to claim 1, characterized in that: In step S2, the empirical formula includes: Where v is the ultrasonic speed.

4. The method for monitoring the status of a pump station flap door according to claim 3, characterized in that: The correction method for establishing the distance l from the ultrasonic emission point to the door reflection point based on the basic data and the ultrasonic data specifically includes: Based on the angle relationship of the basic data, the propagation distance l of ultrasonic waves in the air is obtained. ′ The calculation formula is: l′=m′ / sinθ; Based on the sound velocity v″ of ultrasound in water and the propagation time t″ of ultrasound in water, the calculation formula for the propagation distance l″ of ultrasound in water is obtained as follows: l″=v″*t″ / 2; l is modified according to the relationship l=l′+l″; The distance l from the ultrasonic emission point to the door reflection point includes the ultrasonic propagation distance l′ in the air and the ultrasonic propagation distance l″ in the water. The ultrasonic round trip time t includes the ultrasonic wave propagation time t′ in the air and the ultrasonic wave propagation time t″ in the water; The ultrasonic sound speed v includes the ultrasonic sound speed v′ in air and the ultrasonic sound speed v″ in water.

5. The method for monitoring the status of a pump station flap door according to claim 4, characterized in that: In step S4, it specifically includes: According to the distance l from the ultrasonic emission point to the door-slapping reflection point and the angle θ between the emission direction of the ultrasonic emission point and the working bridge, the horizontal distance l2 from the ultrasonic wave to the door-slapping reflection point is obtained; l2=l*cosθ; Based on the horizontal distance l2 from the ultrasonic wave to the flap door reflection point and the horizontal distance l1 from the flap door installation point to the ultrasonic wave emission point, the horizontal distance l3 from the ultrasonic wave reflection point to the flap door installation point is obtained; l3=l1-l*cosθ; Based on the height h2 from the flap door installation point to the working bridge and the vertical distance h1 from the launch point to the flap door reflection point, the height h3 from the flap door installation point to the flap door launch point is obtained; h1=l*sinθ; Among them, h1 is the vertical distance from the launch point to the reflection point of the flap door; h3=l*sinθ-h2; The flap door state opening angle is obtained by combining the horizontal distance l3 from the ultrasonic reflection point to the flap door installation point and the angle relationship between the flap door installation point and the flap door emission point h3.

6. The method for monitoring the status of a pump station flap door according to claim 1, characterized in that: If at least one of the ultrasonic data, basic data, and the distance l from the ultrasonic emission point to the door reflection point is abnormal, an alarm signal will be issued at the working bridge.

7. A system for monitoring the status of a pump station flap door, applied to the method for monitoring the status of a pump station flap door as claimed in any one of claims 1 to 6, characterized in that: It includes data module, processing module and output module; The data module is used to obtain basic data and ultrasonic data, and send the basic data and ultrasonic data to the processing module; After receiving the basic data and ultrasonic data, the processing module corrects and processes the data to obtain the door opening status. And the basic data, ultrasonic data and flap door status opening Send to output module; The output module receives basic data, ultrasonic data and door status opening Finally, based on the above data display, simulation and monitoring.

8. The pump station flap door status monitoring system according to claim 7, characterized in that: The data module includes a preset module and an ultrasonic module, wherein the preset module is used to obtain basic data, and the ultrasonic module is used to detect the round-trip time t from the ultrasonic emission point to the door in real time.

9. The pump station flap door status monitoring system according to claim 7, characterized in that: The processing module includes a receiving module, a data correction module and a flap door opening calculation module. The data receiving module is used to receive the basic data and ultrasonic data sent by the data module, and obtain the distance l from the ultrasonic emission point to the flap door reflection point based on the basic data and the ultrasonic data; the data correction module corrects the distance l from the ultrasonic emission point to the flap door reflection point based on the basic data and the ultrasonic data; the flap door opening calculation module obtains the flap door state opening based on the basic data and the corrected distance l from the ultrasonic emission point to the flap door reflection point 10. The pump station flap door status monitoring system according to claim 7, characterized in that: The output module includes an output processing module and a display module, a simulation module and an alarm module connected to the output processing module. The display module is used to display the door opening on the working bridge. The simulation module is used to calculate the basic data, ultrasonic data, the distance l from the ultrasonic emission point to the door reflection point, and the door opening status. To simulate the scene; the alarm module is used to monitor basic data, ultrasonic data, the distance l from the ultrasonic emission point to the door reflection point, and the door status opening Whether it exceeds the preset value range.

Images