An emergency water flow measurement device

Abstract

This invention provides an emergency water flow measurement device, comprising a drone equipped with a BeiDou-3 short message terminal based on RTK positioning. A water depth measuring lidar and a tracer float are located beneath the drone. The drone contains a first motor and a second motor, the shafts of which are clamped to a nylon cable drum via a drum coupling. A nylon cable is threaded onto the nylon cable drum, and its lower end is fixed to the tracer float. This invention ensures camera capture efficiency during emergency observation by using a large-scale artificial tracer float with a diameter of decimeters. The BeiDou-3 short message terminal based on RTK positioning not only enables high-precision BeiDou RTK positioning of the drone but also transmits data to the observation center in real time via BeiDou short messages, improving the timeliness of emergency observation. The device allows for the release, retrieval, and attraction of the artificial tracer float, enabling its reuse and improving economic efficiency.

Description

Technical Field

[0001] This utility model relates to the field of water conservancy measurement technology, specifically to an emergency measurement device for incoming water flow. Background Technology

[0002] Unmanned aerial vehicle (UAV) flow measurement technology is an emerging emergency monitoring technology for surface velocity and flow rate of incoming water. In emergency situations such as flooding, UAVs equipped with Doppler radar or visual cameras can be used to conduct safe and reliable measurements by flying over temporary observation points in the flood discharge area. This eliminates the need for time-consuming and labor-intensive construction of fixed measurement devices, thus UAV flow measurement technology has broad application prospects.

[0003] However, there are still shortcomings in UAV flow measurement technology: when the UAV flies at a high altitude and the surface turbulence of the incoming water is high, it is difficult for the tiny natural or artificial tracers on the surface to be captured stably and reliably by the mainstream civilian cameras on the air. Existing technologies provide online measurement methods, but the measurement data has not yet been transmitted over long distances in real time. The observation center still cannot obtain and analyze the measurement data in a timely manner, which affects the timeliness of emergency observation. The tracers are mostly marked with disposable foam, which is costly to measure and produces white pollution. Utility Model Content

[0004] The main objective of this invention is to provide an emergency water flow measurement device, which aims to effectively solve the problems in the background technology.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An emergency water flow measurement device includes a drone. The drone is equipped with a Beidou-3 short message terminal based on RTK positioning. A water depth measurement lidar and a tracer float are located below the drone. The drone contains a first motor and a second motor. The shafts of the first motor and the second motor are clamped to a nylon wire drum via a drum coupling. A nylon wire is threaded through the nylon wire drum, and the lower end of the nylon wire is fixed to the tracer float.

[0007] While adopting the above technical solutions, this utility model may also adopt or combine the following technical solutions:

[0008] As a preferred technical solution of this utility model: the emergency water flow measurement device further includes an electromagnetic armature platform, which is fixed to the bottom of the UAV. The upper end of the tracer float is provided with an annular iron plate and an iron ring inside the annular iron plate. The iron ring is fixed to the nylon line. The electromagnetic armature platform is used to attract the annular iron plate on the tracer float when energized.

[0009] As a preferred technical solution of this utility model: the size of the tracer float is in the decimeter range, the whole is ellipsoidal, hollow in the middle, and a disc extends from the tail. The disc is embedded with a ring-shaped iron piece, and the center point of the disc surface is connected to the iron ring.

[0010] As a preferred technical solution of this utility model: the other end of the nylon thread is fixed to the nylon thread spool.

[0011] As a preferred technical solution of this utility model: the drone is also equipped with a camera, which is mounted on the front end of the lower surface of the drone via a horizontal bracket.

[0012] As a preferred technical solution of this utility model: the Beidou-3 short message terminal based on RTK positioning is installed on the upper surface of the UAV fuselage.

[0013] As a preferred technical solution of this utility model: the water depth measuring lidar is mounted on the rear end of the lower surface of the UAV via a vertical support.

[0014] As a preferred technical solution of this utility model: the Beidou-3 short message terminal based on RTK positioning is connected to the water depth measurement lidar via a signal connection.

[0015] This utility model provides an emergency water flow measurement device, which has the following beneficial effects:

[0016] 1) Setting up a Beidou-3 short message terminal based on RTK positioning can not only perform high-precision Beidou RTK positioning on UAVs to achieve precise flight and fixed-point observation, but also send measured water depth data to the observation center online in real time in the form of Beidou short messages, improving the timeliness of emergency observation.

[0017] 2) Setting up large-scale artificial tracer floats at the decimeter level ensures good visibility even when the UAV is flying at a high altitude and the surface turbulence of the incoming water is high, thus guaranteeing the camera's capture efficiency during emergency observations.

[0018] 3) It can release, recover and attract artificial tracer floats, realizing the reuse of artificial tracer floats and improving the economy of emergency observation. Attached Figure Description

[0019] Figure 1 This is an overall structural diagram of the emergency water flow measurement device provided by this utility model.

[0020] Figure 2 This is a cross-sectional view perpendicular to the direction of the drone's fuselage;

[0021] In the figure: 1. Beidou-3 short message terminal based on RTK positioning; 2. UAV; 3. Water depth measurement lidar; 4. Electromagnetic armature platform; 5. Tracer float; 6. Camera; 2-1. Nylon wire reel; 2-2. First motor; 2-3. Second motor; 5-1. Ring-shaped iron sheet; 5-2. Iron ring. Detailed Implementation

[0022] The present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 1-2 As shown, an emergency water flow measurement device includes a drone 2. The drone 2 is equipped with a Beidou-3 short message terminal 1 based on RTK positioning. The end of the drone 2 is equipped with a camera 6. The drone 2 is equipped with a water depth measuring lidar 3 and a tracer float 5 below the drone 2. The drone 2 is equipped with a first motor 2-2 and a second motor 2-3. The shafts of the first motor 2-2 and the second motor 2-3 are clamped to the left and right of a nylon wire drum 2-1 by a drum coupling. A nylon wire is threaded on the nylon wire drum 2-1, and the lower end of the nylon wire is fixed to the tracer float 5.

[0024] The emergency water flow measurement device also includes an electromagnetic armature platform 4, which is fixed below the drone 2. The upper end of the tracer float 5 is provided with an annular iron plate 5-1 and an iron ring 5-2 inside the annular iron plate 5-1. The iron ring 5-2 is fixed to the nylon line. The electromagnetic armature platform 4 is used to attract the annular iron plate 5-1 on the tracer float 5 when it is energized.

[0025] The iron ring 5-2, nylon wire drum 2-1, first motor 2-2, second motor 2-3, and electromagnetic armature platform 4 work together to attract, release, and recover the tracer float 5.

[0026] The tracer float 5 is in the decimeter range in size, and is ellipsoidal in shape with a hollow center and a disc extending from the tail. The disc contains a ring-shaped iron plate 5-1, and the center point of the disc surface is connected to an iron ring 5-2.

[0027] The other end of the nylon thread is fixed to the nylon thread spool 2-1.

[0028] The drone 2 is also equipped with a camera 6, which is mounted on the front of the lower surface of the drone 2 via a horizontal bracket.

[0029] The Beidou-3 short message terminal 1 based on RTK positioning is installed on the upper surface of the fuselage of the UAV 2.

[0030] The water depth measuring lidar 3 is mounted on the rear end of the lower surface of the UAV 2 via a vertical support.

[0031] The Beidou-3 short message terminal 1, based on RTK positioning, is connected to the water depth measurement lidar 3 via a signal connection.

[0032] The Beidou-3 short message terminal 1, based on RTK positioning, is used for Beidou RTK high-precision positioning. At the same time, it sends the measured water depth data and the photos taken by the camera to the observation center online in real time in the form of Beidou short messages.

[0033] The water depth measurement lidar 3 is used to measure the water depth at different water depth measurement points on a cross section.

[0034] Camera 6 is used to take pictures of the drift trajectory of the tracer float 5 on the surface of the incoming water at different surface velocity measurement points of the cross section, so as to facilitate the calculation of the surface velocity by dividing the trajectory length by the time interval. Camera 6 can be set on the same drone 2 or on different drones 2, as long as it can capture the tracer float 5.

[0035] The principle of attracting, releasing, and recovering the tracer float 5 is as follows:

[0036] When the UAV 2 has recovered the tracer float 5 and needs to maintain the state of attracting the tracer float 5, the electromagnetic armature platform 4 remains energized, generates magnetism, and attracts the annular iron piece 5-1 in the tail disk of the tracer float 5 directly below, thereby achieving the purpose of attracting the tracer float 5.

[0037] When the drone 2 is attracting the tracer float 5 and needs to release the tracer float 5 to the surface of the incoming water, the first step is to synchronously reverse the first motor 2-2 and the second motor 2-3, driving the nylon line drum 2-1 to reverse and release the nylon line. After the nylon line is in a completely slack state, the first motor 2-2 and the second motor 2-3 are de-energized and braked. The second step is to de-energize the electromagnetic armature platform 4 and release the tracer float 5 directly below. The tracer float 5 falls to the surface of the incoming water under its own gravity.

[0038] When the drone 2 has released the tracer float 5 to the surface of the incoming water, and it is necessary to retrieve the tracer float 5 to directly below the electromagnetic armature platform 4, the first step is to synchronously rotate the first motor 2-2 and the second motor 2-3 to drive the nylon line drum 2-1 to rotate and retrieve the nylon line. The nylon line pulls the tracer float 5 to directly below the electromagnetic armature platform 4 through the iron ring 5-2. The second step is to energize the electromagnetic armature platform 4 to obtain magnetism, attracting the tracer float 5 directly below so that it does not fall. Then, the first motor 2-2 and the second motor 2-3 are de-energized and braked.

[0039] Specifically, the aforementioned emergency water flow measurement device is implemented in the following manner:

[0040] S1. Enable Beidou RTK high-precision positioning function, select the water flow measurement section, plan the flight trajectory of the UAV over the section, and set the water depth measurement point and surface velocity measurement point on the flight trajectory.

[0041] S2. Take off the drone. The drone flies along the flight path and begins the corresponding measurement work when it reaches the water depth measurement point and the surface flow velocity measurement point.

[0042] S3. After the UAV flies to the water depth measurement point, the water depth of the water depth measurement lidar is measured at the point; after all water depth measurement points are measured, the data is transmitted to the observation center and the cross-sectional area is calculated by accumulating the product of the water surface width and water depth at all water depth measurement points.

[0043] S4. After the drone flies to the surface velocity measurement point, it releases a tracer float onto the surface of the incoming water. The tracer float drifts perpendicular to the cross-section under the propulsion of the incoming water. The camera captures the drift trajectory of the tracer float on the surface of the incoming water. The surface velocity can be calculated by dividing the trajectory length by the time interval. After the surface velocity measurement is completed, the drone retrieves the tracer float to the electromagnetic armature platform on the lower surface of the fuselage. The electromagnetic armature platform is energized to attract the tracer float. The drone then carries the tracer float to the next surface velocity measurement point to continue the measurement. When the surface velocity at all surface velocity measurement points has been measured, the average surface velocity of all surface velocity measurement points on the cross-section is calculated to obtain the average surface velocity. The flow rate of the incoming water passing through the cross-section is calculated by multiplying the average surface velocity by the cross-sectional area.

[0044] S5. Further utilize the Beidou-3 short message terminal based on RTK positioning to send the measured water depth data and the photos taken by the camera, including the drift trajectory of the tracer float on the surface of the incoming water (used to calculate surface flow velocity data), to the observation center online in real time so that users can analyze them in a timely manner.

[0045] S6. Land the drone and turn off the Beidou RTK high-precision positioning function.

[0046] The above specific embodiments are used to explain and illustrate the present utility model, and are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made to the present utility model within the spirit and protection scope of the claims shall fall within the protection scope of the present utility model.

Claims

1. An emergency water inflow measuring device, comprising a drone (2), characterized in that: The UAV (2) is equipped with a Beidou-3 short message terminal (1) based on RTK positioning. The UAV (2) is equipped with a water depth measurement lidar (3) and a tracer float (5) below it. The UAV (2) is equipped with a first motor (2-2) and a second motor (2-3) inside. The shafts of the first motor (2-2) and the second motor (2-3) are clamped to the left and right of a nylon wire drum (2-1) by a drum coupling. Nylon wire is threaded on the nylon wire drum (2-1), and the lower end of the nylon wire is fixed to the tracer float (5).

2. The emergency flow measuring device for incoming water according to claim 1, characterized in that: The emergency water flow measurement device also includes an electromagnetic armature platform (4), which is fixed below the drone (2). The upper end of the tracer float (5) is provided with an annular iron plate (5-1) and an iron ring (5-2) inside the annular iron plate (5-1). The iron ring (5-2) is fixed to the nylon line. The electromagnetic armature platform (4) is used to attract the annular iron plate (5-1) on the tracer float (5) when it is energized.

3. The emergency flow measuring device of claim 1, wherein: The tracer float (5) is in the decimeter range in size, and is ellipsoidal in shape with a hollow center and a disc extending from the tail. The disc is inlaid with a ring-shaped iron plate (5-1), and the center point of the disc surface is connected to an iron ring (5-2).

4. The emergency flow measuring device of claim 1, wherein: The other end of the nylon thread is fixed to the nylon thread spool (2-1).

5. The emergency flow measuring device of claim 1, wherein: The drone (2) is also equipped with a camera (6), which is mounted on the front end of the lower surface of the drone (2) via a horizontal bracket.

6. The emergency flow measuring device of claim 1, wherein: The Beidou-3 short message terminal (1) based on RTK positioning is installed on the upper surface of the fuselage of the UAV (2).

7. The emergency flow measuring device of claim 1, wherein: The water depth measuring lidar (3) is mounted on the rear end of the lower surface of the UAV (2) via a vertical support.

8. The emergency flow measuring device of claim 1, wherein: The Beidou-3 short message terminal (1) based on RTK positioning is connected to the water depth measurement lidar (3) via a signal connection.

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