Dual antenna radar current meter

Abstract

The utility model relates to a kind of double antenna radar flow velocity meter, comprising: first shield, first antenna board, power board, main control board, second shield, second antenna board, shell, electric connector, antenna protective cover;Wherein: first antenna board is fixed on antenna protective cover and the normal of first antenna board and horizontal plane included angle is 45 °, second antenna board is fixed on antenna protective cover and the normal of second antenna board and horizontal plane included angle is 55 °, there is a certain interval between first antenna board and second antenna board, first shield is fixed on the surface of first antenna board towards inner cavity, second shield is fixed on the surface of second antenna board towards inner cavity, main control board is installed above second shield, power board is installed above main control board, electric connector is fixedly installed on shell, at least 1 window is provided in part of shell, and antenna protective cover covers window and is fixed.

Description

Technical Field

[0001] This utility model relates to the field of flow velocity measurement technology, specifically to a dual-antenna radar flow velocity meter. Background Technology

[0002] A radar current meter is an instrument designed for non-contact measurement of surface flow velocity in water bodies, used in industries such as hydrological monitoring, river flow monitoring, agricultural irrigation, municipal water supply and drainage, and industrial wastewater treatment.

[0003] Existing radar current meters primarily utilize the backbraking scattering and Doppler effect of water waves on radar electromagnetic waves to obtain radial flow velocity information. Typically, a millimeter-wave radar antenna is used, illuminating the water surface corresponding to the measured flow velocity at a certain tilt angle. The radar antenna transmits and receives signals, identifying the magnitude of the flow velocity by analyzing the vector component characteristics of the echo signal along the radar wave beam direction.

[0004] However, existing radar current meters are susceptible to vertical water wave fluctuations, especially ripples caused by wind, leading to false velocity values. This is because the velocity is typically affected by the component of the longitudinal velocity of the water surface undulations in the radar's transmission direction. This is particularly true when radial flow is low, as the longitudinal velocity of the water surface undulations caused by wind can produce false velocity signals in the direction of the radar's transmitted and received beam, resulting in measurement errors. The most typical example is when the water surface is still; wind-induced ripples cause the component of the longitudinal velocity of the water surface undulations in the radar's transmission direction, leading to false readings from the radar current meter. Utility Model Content

[0005] To address the above problems, this utility model provides a dual-antenna radar current meter, which includes:

[0006] The system comprises: a first shielding cover, a first antenna board, a power supply board, a main control board, a second shielding cover, a second antenna board, a housing, electrical connectors, and an antenna protective cover; wherein:

[0007] The first antenna board is fixed on the antenna protective cover, and the angle between the normal of the first antenna board and the horizontal plane is 45°. The second antenna board is fixed on the antenna protective cover, and the angle between the normal of the second antenna board and the horizontal plane is 55°. There is a certain gap between the first antenna board and the second antenna board. A first shielding cover is fixed on the surface of the first antenna board facing the inner cavity, and a second shielding cover is fixed on the surface of the second antenna board facing the inner cavity. The main control board is installed above the second shielding cover, and the power supply board is installed above the main control board. The electrical connector is fixedly installed on the housing. At least one window is provided in a part of the housing. The antenna protective cover covers the window and is fixed. The electrical connector is electrically connected to the power supply board, and the power supply board supplies power to the main control board.

[0008] The antenna radome is a thin plate with flanges made of a material that can penetrate radar waves. The antenna radome includes two parts separated by the flanges. The first part is parallel to the first antenna plate, and the second part is parallel to the second antenna plate.

[0009] The first shield and the second shield are thin metal plates with flanges.

[0010] The electrical connector is an aviation plug.

[0011] The housing is made of aluminum alloy.

[0012] The dual-antenna radar current meter also includes a cover plate and a second window opened at the bottom of the housing. The cover plate is fixed to the second window in a manner that covers the window, and a water level radar module is fixedly installed on the back of the cover plate.

[0013] The cover plate is a thin plate made of a material that can be penetrated by radar waves.

[0014] The beneficial effects of this utility model are as follows:

[0015] The dual-antenna radar current meter provided by this invention uses two planar radar array antennas to illuminate the water target whose flow velocity is to be measured at different angles, respectively acquiring the comprehensive flow velocity of the target in its respective radar transmission direction. This comprehensive flow velocity is the vector sum of the components of the longitudinal undulation velocity and the radial flow velocity in their respective radar transmission directions. Using a known vector synthesis algorithm, the longitudinal undulation velocity and the radial flow velocity can be accurately calculated, effectively reducing or overcoming the measurement error caused by the longitudinal velocity of the water surface fluctuations. The dual-antenna radar current meter also includes a radar level gauge for measuring water level height, achieving functional diversification and further reducing the user's cost. Attached Figure Description

[0016] Figure 1 A schematic diagram of the cross-sectional structure of a dual-antenna radar current meter provided by this utility model;

[0017] Figure 2 A schematic diagram of the external structure of a dual-antenna radar current meter provided by this utility model;

[0018] Figure 3 A top view of the internal exploded structure of a dual-antenna radar current meter provided by this utility model;

[0019] Figure 4 A bottom view of the internal exploded structure of a dual-antenna radar current meter provided by this utility model. Detailed Implementation

[0020] 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.

[0021] refer to Figure 1-4 This utility model proposes a dual-antenna radar current meter, comprising: a first shielding cover 3, a first antenna plate 4, a power board 5, a main control board 6, a second shielding cover 7, a second antenna plate 8, a housing 9, an electrical connector 10, and an antenna protective cover 12; wherein, the first antenna plate 4 is fixed on the antenna protective cover 12 and the angle between the normal of the first antenna plate 4 and the horizontal plane is 45°, the second antenna plate 8 is fixed on the antenna protective cover 12 and the angle between the normal of the second antenna plate 8 and the horizontal plane is 55°, there is a certain gap between the first antenna plate 4 and the second antenna plate 8, and the first antenna plate 4 faces the housing. A first shielding cover 3 is fixed on the surface of the inner cavity of housing 9, and a second shielding cover 7 is fixed on the surface of the second antenna plate 8 facing the inner cavity of housing 9. The main control board 6 is installed above the second shielding cover 7, the power board 5 is installed above the main control board 6, and the electrical connector 10 is fixedly installed on housing 9. At least one window is opened in a part of housing 9, and the antenna protective cover 12 is fixed at the window in a way that covers the window. The electrical connector 10 is electrically connected to the power board 5, the power board 5 supplies power to the main control board 6, and housing 9, electrical connector 10, and antenna protective cover 12 together form a closed space.

[0022] The antenna protective cover 12 is a thin plate with flanges made of materials such as POM and PTFE, which have good radar wave penetration. This protects the first antenna plate 4 and the second antenna plate 8 from physical damage from external objects, while allowing radar waves emitted by the first antenna plate 4 and the second antenna plate 8 and radar waves reflected back from the detected object to pass through effectively. The antenna protective cover 12 includes two parts separated by flanges. The first part is parallel to the first antenna plate 4, and the second part is parallel to the second antenna plate 8. That is, the angle between the normal of the part of the antenna protective cover protecting the first antenna plate 4 and the horizontal plane is 45°, and the angle between the normal of the part of the antenna protective cover protecting the second antenna plate 8 and the horizontal plane is 55°.

[0023] The first shielding cover 3 and the second shielding cover 7 are made of metal material, which can be thin metal plates with flanges.

[0024] The first shielding cover 3 is fixedly installed on the back of the first antenna board 4, and the second shielding cover 7 is fixedly installed on the back of the second antenna board 8.

[0025] The first shielding cover 3 and the second shielding cover 7 can reduce or isolate the interference caused by electromagnetic waves from the back side of the first antenna plate 4 and the second antenna plate 8 to the first antenna plate and the second antenna plate 8.

[0026] Both the first antenna board 4 and the second antenna board 8 use existing known radar transceiver antennas.

[0027] The power supply board 5 can be any existing known power supply board, i.e., a circuit board that controls the power supply, and the main control board 6 can be any existing known control circuit board. Both the power supply board 5 and the main control board 6 can be purchased directly from the market. The power supply board 5 is electrically connected to the main control board 6 to supply power to it.

[0028] The electrical connector 10 is electrically connected to the power board via a metal wire. An aviation plug can be used as the electrical connector. Its installation method on the housing 9 is as follows: a circular opening is made in the housing, the aviation plug passes through the circular opening, and is secured by a retaining ring and a nut. The aviation plug generally consists of a plug and a socket; the socket is fixed to the housing, and the plug connects to an external power source.

[0029] The housing 9 can be made of a sturdy material, preferably aluminum alloy.

[0030] In a preferred embodiment, the dual-antenna radar current meter proposed by this utility model further includes a cover plate 11 and a second window opened at the lower part of the housing 9. The cover plate 11 is fixed at the second window in a manner that covers the window. A water level radar module is fixedly installed on the back of the cover plate 11 (i.e., the surface facing the cavity of the housing) for measuring water level. The water level radar is also called a radar water level gauge. The structure of the water level radar module itself is not the focus of this utility model. Existing known water level radar modules can be used, and they will not be described in detail.

[0031] The cover plate 11 is a thin plate made of materials such as POM and PTFE, which have good radar wave penetration. Its function is to selectively install the cover plate inside the cover plate. It can protect the water level radar module from physical damage from external objects, and allow the radar waves emitted by the water level radar module and the radar waves reflected back by the detected objects to pass through effectively.

[0032] Alternatively, screws can be used for fixing here. For example... Figure 1 As shown, the screw 2 is screwed into the hollow copper column 1 with internal threads to achieve fixation. This method is existing technology and will not be described in detail here.

[0033] The above description provides a further detailed explanation of the present invention in conjunction with specific embodiments. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present invention.

Claims

1. A dual-antenna radar current meter, characterized in that, include: The system comprises: a first shielding cover, a first antenna board, a power supply board, a main control board, a second shielding cover, a second antenna board, a housing, electrical connectors, and an antenna protective cover; wherein: The first antenna board is fixed on the antenna protective cover, and the angle between the normal of the first antenna board and the horizontal plane is 45°. The second antenna board is fixed on the antenna protective cover, and the angle between the normal of the second antenna board and the horizontal plane is 55°. There is a certain gap between the first antenna board and the second antenna board. A first shielding cover is fixed on the surface of the first antenna board facing the inner cavity, and a second shielding cover is fixed on the surface of the second antenna board facing the inner cavity. The main control board is installed above the second shielding cover, and the power supply board is installed above the main control board. The electrical connector is fixedly installed on the housing. At least one window is provided in a part of the housing. The antenna protective cover covers the window and is fixed. The electrical connector is electrically connected to the power supply board, and the power supply board supplies power to the main control board.

2. The dual-antenna radar current meter according to claim 1, characterized in that, The antenna radome is a flanged thin plate made of a material that can penetrate radar waves. The antenna radome includes two parts separated by the flange, the first part being parallel to the first antenna plate and the second part being parallel to the second antenna plate.

3. The dual-antenna radar current meter according to claim 1, characterized in that, The first and second shielding covers are thin metal plates with flanges.

4. The dual-antenna radar current meter according to claim 1, characterized in that, The electrical connector is an aviation plug.

5. The dual-antenna radar current meter according to claim 1, characterized in that, The casing is made of aluminum alloy.

6. The dual-antenna radar current meter according to claim 1, characterized in that, The dual-antenna radar current meter also includes a cover plate and a second window opened at the bottom of the housing. The cover plate is fixed to the second window in a manner that covers the window, and a water level radar module is fixedly installed on the back of the cover plate.

7. The dual-antenna radar current meter according to claim 6, characterized in that, The cover plate is a thin plate made of a material that can be penetrated by radar waves.

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