Doppler log instrument based on FFT (Fast Fourier Transform)

Abstract

The utility model discloses a Doppler log instrument based on FFT (fast Fourier transform), which comprises a main body unit, the main body unit comprises an instrument body, the outer side of the instrument body is provided with a waterproof shell, the upper end of the waterproof shell is fixedly connected with a rotating rod, and the upper end of the rotating rod is fixedly connected with a connecting flange. The connecting flange is fixedly installed at the bottom of a ship, when turbulent flow makes contact with the main flow guide plate, the main flow guide plate can break the turbulent flow, bubbles are avoided, when the turbulent flow makes contact with the fixing rod and the auxiliary flow guide plate from the main flow guide plate, the auxiliary flow guide plate can drive the connecting rod to deflect, and then under the torsion effect of the torsion spring, bubbles are prevented from being generated. The fixing rod drives the main flow guide plate to start to deflect, the main flow guide plate and the auxiliary flow guide plate are made to be horizontal, meanwhile, the main flow guide plate drives the clamping plate to rotate on the surface of the waterproof shell, the instrument body and the ship are kept fixed, and therefore under the condition that the water speed is higher or lower than the ship speed, influence and interference of turbulent flow and bubbles on the instrument body can be effectively reduced; the practicability is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of Doppler odometers, in particular to a Doppler odometer based on FFT. Background Art

[0002] A Doppler log is a device that uses the Doppler effect to measure the speed of sound wave propagation in a fluid and the speed of fluid movement. It measures distance based on the received echo. Due to the influence of fluid movement on the speed of sound wave propagation, it can provide data such as wind speed, waves, and ocean currents. The FFT algorithm can speed up the calculation by dividing the signal into different frequency components. Compared with traditional algorithms, a Doppler log based on FFT technology can provide ship speed and position information more accurately and quickly.

[0003] The existing patent number CN219969963U discloses a high-speed Doppler speed meter with a guide mechanism, which includes a Doppler speed meter sealed cabin, a guide mechanism and a mounting screw, the mounting screw is installed outside the Doppler speed meter sealed cabin, the guide mechanism includes a guide plate and a connecting plate, the bottom connecting plate is located at the transducer at the bottom of the Doppler speed meter sealed cabin, the top connecting plate is located at the top plate of the Doppler speed meter sealed cabin, the multiple connecting plates are sequentially installed outside the Doppler speed meter sealed cabin and fixed with the mounting screw, the guide plate is two pieces fixed between the two connecting plates, the outer ends of the two guide plates are fitted to each other, and the inner ends are all fitted to the outer wall of the Doppler speed meter sealed cabin to form a water drop-shaped structure, the instrument provided by the utility model can effectively reduce the interference of turbulence and bubbles on the water surface around the Doppler speed meter when the underwater vehicle is sailing at high speed, and improve the measurement accuracy of the Doppler speed meter.

[0004] The existing technology uses guide plates to break up the turbulence during navigation and reduce the generation of bubbles. However, when the ship is sailing slowly and the water flow speed is higher than the ship speed, the underwater turbulence will still affect the instrument and generate bubbles, which will interfere with the instrument's detection and reduce the accuracy of the measurement. Utility Model Content

[0005] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] In view of the above problems existing in the existing FFT-based Doppler odometer, the present utility model is proposed.

[0007] Therefore, the purpose of the utility model is to provide a Doppler odometer based on FFT, which is designed to solve the problem that "the existing technology breaks up the turbulence during navigation through guide plates to reduce the generation of bubbles, but when the ship is sailing slowly and the water flow speed is higher than the ship speed, the underwater turbulence will still affect the instrument and generate bubbles, which will interfere with the detection of the instrument and reduce the accuracy of the measurement."

[0008] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0009] A Doppler odometer based on FFT, comprising:

[0010] The main unit comprises an instrument body, a waterproof shell is arranged on the outside of the instrument body, a rotating rod is fixedly connected to the upper end of the waterproof shell, and a connecting flange is fixedly connected to the upper end of the rotating rod;

[0011] The drainage unit includes a main drainage plate arranged on the outside of the instrument body, and a fixing groove is provided on the upper surface of the main drainage plate, and two groups of clamping plates are movably connected to the inner wall of the fixing groove, and the sides of the clamping plates close to each other are provided with placement grooves matched with the waterproof shell, the inner walls of the two groups of the placement grooves are rotatably connected to the surface of the waterproof shell, and one side of the two groups of the clamping plates is provided with a disassembly and assembly component, one side of the main drainage plate is fixedly connected to a fixing rod, and a guiding drainage plate is provided on one side of the fixing rod, and a movable groove is provided on the surface of one end of the fixing rod away from the main drainage plate, and a torsion component is provided inside the movable groove.

[0012] As a preferred solution of the Doppler odometer based on the utility model, wherein: the side of the main guide plate away from the fixed rod is designed in an arc shape, and the arc design area is set at an acute angle.

[0013] As a preferred solution of a Doppler odometer based on the utility model, the two groups of disassembly and assembly components both include threaded rods threadedly connected to the clamping plate, and the threaded rods are both connected to the main guide plate through threads, one group of the clamping plates is fixedly connected to one side of the waterproof shell with two groups of plug rods, and the other group of the clamping plates is provided with two groups of slots matching the plug rods on one side of the waterproof shell.

[0014] As a preferred solution of the Doppler odometer based on the utility model, the ends of the two groups of threaded rods facing away from the instrument body are fixedly connected to handles, and the handles are fixedly connected to sealing rings on the side close to the main guide plate, and the sealing rings are made of rubber.

[0015] As a preferred solution of a Doppler odometer based on the utility model, the torsion assembly includes a connecting rod movably connected to the inner wall of the movable groove, and the end of the connecting rod away from the fixed rod is fixedly connected to the guide diversion plate, the upper and lower sides of the connecting rod are fixedly connected to the rotating shaft, and the surface of the rotating shaft is fixedly connected to the fixed circular plate, the upper and lower inner walls of the movable groove are provided with spring grooves, and torsion springs are arranged inside the spring grooves, and the two ends of the two groups of torsion springs are respectively fixedly connected to the fixed circular plate and the inner wall of the spring groove.

[0016] As a preferred solution of the Doppler odometer based on the utility model, the upper sides of the two groups of the clamping plates are fixedly connected with sealing strips, and the sealing strips are rotatably connected to the outer surface of the rotating rod, and the two groups of sealing strips are made of rubber.

[0017] Beneficial effects of the utility model:

[0018] 1. During use, it is fixedly installed on the bottom of the ship through the connecting flange. When the turbulent flow contacts the main baffle, the main baffle will break the turbulence to avoid the generation of bubbles. When the turbulent flow contacts the fixed rod and the auxiliary baffle from the main baffle, the auxiliary baffle will drive the connecting rod to deflect. Then, under the torsion of the torsion spring, the fixed rod drives the main baffle to start deflecting, so that the main baffle and the auxiliary baffle are level. At the same time, the main baffle drives the clamping plate to rotate on the surface of the waterproof shell, so that the instrument body and the ship remain fixed. Therefore, no matter the water speed is higher or lower than the ship speed, the influence of turbulence and bubbles on the instrument body can be effectively reduced, and the practicality is effectively improved.

[0019] 2. By providing a sealing ring, seawater will not penetrate into and contact the threaded rod during long-term use, causing rust and affecting disassembly and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0021] Figure 1 A three-dimensional structural schematic diagram of a Doppler odometer based on FFT proposed by the utility model;

[0022] Figure 2 for Figure 1 A schematic cross-sectional view of the three-dimensional structure;

[0023] Figure 3 for Figure 1Schematic diagram of the three-dimensional structure explosion;

[0024] Figure 4 for Figure 2 A schematic diagram of the enlarged structure in the middle.

[0025] In the figure: 100, main unit; 101, instrument body; 102, waterproof shell; 103, rotating rod; 104, connecting flange; 200, drainage unit; 201, main guide plate; 202, fixing groove; 203, clamping plate; 204, placement groove; 205, sealing strip; 206, disassembly and assembly component; 206a, threaded rod; 206b, sealing ring; 206c, plug rod; 207, fixing rod; 208, torsion component; 208a, connecting rod; 208b, rotating shaft; 208c, fixed circular plate; 208d, torsion spring; 209, guiding guide plate. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0029] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0030] Reference Figure 1 -4. The utility model provides a Doppler odometer based on FFT, comprising:

[0031] The main unit 100 includes an instrument body 101, a waterproof shell 102 is arranged outside the instrument body 101, and a rotating rod 103 is fixedly connected to the upper end of the waterproof shell 102, and a connecting flange 104 is fixedly connected to the upper end of the rotating rod 103 for fixed connection with a vessel;

[0032] The drainage unit 200 includes a main drainage plate 201 arranged on the outside of the instrument body 101, and a fixing groove 202 is provided on the upper surface of the main drainage plate 201, and two groups of clamping plates 203 are movably connected to the inner wall of the fixing groove 202, and a placement groove 204 matching the waterproof shell 102 is provided on the side of the clamping plates 203 close to each other, and the inner walls of the two groups of placement grooves 204 are rotatably connected to the surface of the waterproof shell 102 through bearings, and a disassembly assembly 206 is provided on one side of the two groups of clamping plates 203, a fixing rod 207 is fixedly connected to one side of the main drainage plate 201, and a guiding drainage plate 209 is provided on one side of the fixing rod 207, and a movable groove is provided on the surface of one end of the fixing rod 207 away from the main drainage plate 201, and a torsion assembly 208 is provided inside the movable groove.

[0033] The side of the main deflector plate 201 away from the fixing rod 207 is designed to be arc-shaped, and the arc-shaped design area is set at an acute angle, so that the main deflector plate 201 can break up the turbulence and reduce the impact of turbulence and the generation of bubbles.

[0034] Furthermore, both groups of disassembly and assembly components 206 include threaded rods 206a threadedly connected to the locking plate 203, and the threaded rods 206a are connected to the main guide plate 201 by threaded rotation. One group of locking plates 203 is fixedly connected to one side of the waterproof shell 102 with two groups of plug rods 206c, and the other locking plate 203 is provided with two groups of slots matching the plug rods 206c on the side of the waterproof shell 102, and the plug rods 206c are movably connected to the slots. By controlling the rotation of the threaded rod 206a, the locking plate 203 can be locked inside the fixed groove 202.

[0035] Furthermore, the ends of the two sets of threaded rods 206a facing away from the instrument body 101 are fixedly connected to handles, and the handles are fixedly connected to the side of the main guide plate 201 with sealing rings 206b. The sealing rings 206b are made of rubber and have a sealing and waterproofing effect, so that seawater will not come into contact with the threaded rods 206a and cause rust.

[0036] Furthermore, the torsion assembly 208 includes a connecting rod 208a movably connected to the inner wall of the movable groove, and the end of the connecting rod 208a away from the fixed rod 207 is fixedly connected to the auxiliary guide plate 209, the upper and lower sides of the connecting rod 208a are fixedly connected with a rotating shaft 208b, and the surface of the rotating shaft 208b is fixedly connected with a fixed circular plate 208c, the upper and lower inner walls of the movable groove are provided with spring grooves, and the spring grooves are provided with torsion springs 208d, the two ends of the two groups of torsion springs 208d are respectively fixedly connected to the fixed circular plate 208c and the inner wall of the spring groove, the auxiliary guide plate 209 can cooperate with the turbulent displacement, and then under the torsion of the torsion spring 208d, the fixed rod 207 and the main guide plate 201 are driven to deviate, so that the main guide plate 201 and the auxiliary guide plate 209 are aligned in level.

[0037] Furthermore, the upper sides of the two sets of snap plates 203 are fixedly connected with sealing strips 205, and the sealing strips 205 are rotatably connected to the outer surface of the rotating rod 103. The two sets of sealing strips 205 are made of rubber, which not only has the function of waterproof sealing, but also increases the friction of rotation, thereby reducing the rotation speed of the rotating rod 103 and the snap plates 203.

[0038] During use, it is fixedly installed on the bottom of the ship through the connecting flange 104. When the turbulent flow contacts the main deflector plate 201, the main deflector plate 201 will break the turbulent flow to avoid the generation of bubbles. When the turbulent flow contacts the fixed rod 207 and the auxiliary deflector plate 209 from the main deflector plate 201, the auxiliary deflector plate 209 will drive the connecting rod 208a to deflect. Then, under the torsion of the torsion spring 208d, the fixed rod 207 drives the main deflector plate 201 to start deflecting, so that the main deflector plate 201 and the auxiliary deflector plate 209 are level. At the same time, the main deflector plate 201 drives the clamping plate 203 to rotate on the surface of the waterproof shell 102, so that the instrument body 101 and the ship remain fixed and run stably. Therefore, no matter whether the water speed is higher or lower than the ship speed, the influence of turbulence and bubbles on the instrument body 101 can be effectively reduced, thereby effectively improving practicality.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A Doppler odometer based on FFT, characterized in that: include: The main unit (100) comprises an instrument body (101), a waterproof shell (102) is arranged outside the instrument body (101), a rotating rod (103) is fixedly connected to the upper end of the waterproof shell (102), and a connecting flange (104) is fixedly connected to the upper end of the rotating rod (103); The drainage unit (200) comprises a main drainage plate (201) arranged outside the instrument body (101), and the upper surface of the main drainage plate (201) is provided with a fixing groove (202), the inner wall of the fixing groove (202) is movably connected with two groups of clamping plates (203), and the sides of the clamping plates (203) close to each other are both provided with placement grooves (204) matching with the waterproof shell (102), and the inner walls of the two groups of placement grooves (204) are both connected with the waterproof shell (102). The surface of the waterproof shell (102) is rotatably connected, one side of the two groups of the snap plates (203) is provided with a disassembly assembly (206), one side of the main deflector plate (201) is fixedly connected with a fixing rod (207), and one side of the fixing rod (207) is provided with a secondary deflector plate (209), and a movable groove is provided on the surface of one end of the fixing rod (207) away from the main deflector plate (201), and a twisting assembly (208) is provided inside the movable groove.

2. The FFT-based Doppler odometer according to claim 1, characterized in that: The side of the main air flow plate (201) facing away from the fixed rod (207) is designed in an arc shape, and the arc-shaped design area is set at an acute angle.

3. The FFT-based Doppler odometer according to claim 2, characterized in that: Both groups of the disassembly and assembly components (206) include threaded rods (206a) threadedly connected to the clamping plate (203), and the threaded rods (206a) are connected to the main guide plate (201) through threads. One group of the clamping plates (203) is fixedly connected to one side of the waterproof shell (102) with two groups of plugging rods (206c), and the other group of the clamping plates (203) is provided with two groups of slots matching the plugging rods (206c) on one side of the waterproof shell (102).

4. The FFT-based Doppler odometer according to claim 3, characterized in that: The ends of the two groups of threaded rods (206a) facing away from the instrument body (101) are fixedly connected to a handle, and the handles are fixedly connected to a sealing ring (206b) on the side close to the main guide plate (201), and the sealing ring (206b) is made of rubber.

5. The FFT-based Doppler odometer according to claim 4, characterized in that: The torsion assembly (208) includes a connecting rod (208a) movably connected to the inner wall of the movable groove, and one end of the connecting rod (208a) away from the fixed rod (207) is fixedly connected to the auxiliary flow plate (209), the upper and lower sides of the connecting rod (208a) are fixedly connected to the rotating shaft (208b), and the surface of the rotating shaft (208b) is fixedly connected to the fixed circular plate (208c), the upper and lower inner walls of the movable groove are provided with spring grooves, and the spring grooves are provided with torsion springs (208d), and the two ends of the two groups of torsion springs (208d) are respectively fixedly connected to the fixed circular plate (208c) and the inner wall of the spring groove.

6. The FFT-based Doppler odometer according to claim 5, characterized in that: The upper sides of the two sets of the clamping plates (203) are both fixedly connected with sealing strips (205), and the sealing strips (205) are both rotatably connected to the outer surface of the rotating rod (103), and the two sets of the sealing strips (205) are both made of rubber.

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