Marine liquid level radar sensor device

Abstract

The invention provides a marine liquid level radar sensor device. The marine liquid level radar sensor device comprises an upper cover assembly, a display screen assembly, a measuring assembly, a lower shell assembly, a lens antenna assembly and an interface assembly. The upper cover assembly is connected with the upper end of the lower shell assembly; the measuring assembly is installed in the lower shell assembly. The lower end of the display screen assembly is provided with a buckle and a contact which are connected with the buckle on the measuring assembly. The lower end of the lower shell assembly is connected with a lens antenna assembly; a flange adapter of the lens antenna assembly is connected to a ship cabin mounting position; and the interface assembly is connected to the lower shell. The device solves the problems that a traditional radar sensor is low in precision under the complex working condition of a ship, unstable in measurement under shaking and inclination, prone to corrosion and the like through the structural design of integrating vibration resistance, salt mist resistance, moisture resistance and the like, and is suitable for real-time liquid level monitoring of a ship liquid cargo tank, a fuel oil tank and the like.

Description

Technical Field

[0001] This invention relates to the field of marine equipment technology, and more particularly to a marine liquid level radar sensor device. Background Technology

[0002] During ship operation and the loading and unloading of liquid cargo, it is necessary to monitor the liquid levels of various liquid tanks, such as liquid cargo tanks and fuel tanks, in real time to ensure the safe operation of the ship and efficient liquid cargo management. Currently, commonly used liquid level detection devices include float-type, hydrostatic type, and radar type. Among them, liquid level radar sensors are widely used due to their advantages such as non-contact measurement, relatively high accuracy compared to other types of liquid level monitoring devices, and wide applicability.

[0003] However, traditional radar sensors suffer from low accuracy and poor stability when used on ships. In particular, during navigation or loading / unloading liquid cargo, ships are subject to interference from wind, waves, mechanical vibrations, and media fluctuations, leading to unstable radar sensor signals, affecting liquid level measurement accuracy, and even causing direct damage. Furthermore, the complex operating conditions on ships, including prolonged exposure to high temperatures, high humidity, and salt spray corrosion, render traditional radar sensors inadequately waterproof and corrosion-resistant, making them prone to malfunction and shortening their lifespan. Therefore, there is an urgent need for a marine liquid level radar sensor device that can adapt to the vibration environment of ships, possessing high accuracy, strong waterproof and corrosion-resistant properties, and good stability. Summary of the Invention

[0004] To address the aforementioned technical problems of existing radar sensors, such as poor vibration resistance, insufficient corrosion resistance, low measurement accuracy, and low stability, this invention provides a marine liquid level radar sensor device. This invention provides a marine liquid level radar sensor device to achieve high-precision, accurate, and stable measurement adapted to ship vibration and corrosive environments.

[0005] The technical means employed in this invention are as follows: A marine liquid level radar sensor device includes, from top to bottom, an upper cover assembly, a display screen assembly, a measuring assembly, a lower housing assembly, and a lens antenna assembly; The upper cover assembly includes an upper cover, a first O-ring, a sight glass, and a pressure ring. A sight glass window is provided at the top center of the upper cover. The upper part of the sight glass is located within the window, and the lower part of the sight glass is located inside the upper cover. A first O-ring is positioned between the lower part of the sight glass and the upper cover. A pressure ring is located below the sight glass. The pressure ring presses the first O-ring and the sight glass together via threads within the upper cover. The upper cover is connected to the upper end of the lower housing via threads. The display assembly includes a face film, a top cover of the display, an LCD screen, a display circuit board, a back cover of the display, a nylon bracket, and a second O-ring. The face film is provided on the upper surface of the top cover of the display, and the display circuit board and LCD screen are provided inside the top cover of the display. The lower part of the top cover of the display is connected to the back cover of the display. The back cover of the display is connected to the measuring top cover of the measuring assembly. The second O-ring is fitted onto the lower part of the nylon bracket, and then the connected nylon bracket and the second O-ring are connected to the top cover of the display assembly of the display. The measurement assembly includes a main measuring housing, a top measuring cover, a power circuit board, a main control circuit board, potting compound, an RF circuit board, a waveguide horn, a PTFE secondary lens, and a third O-ring. The main control circuit board is located above the power circuit board, and the RF circuit board is inserted into pins on the side of the main control circuit board. The third O-ring is fitted into a groove on the PTFE secondary lens. The waveguide horn is fixed to the internal threads of the PTFE secondary lens via threads. The RF circuit board is fixed to the waveguide horn. The RF circuit board, waveguide horn, and PTFE secondary lens are fixed together as a single unit and then fixed to the lower end of the main measuring housing. The side of the main measuring housing is connected to the lower housing. The top of the top measuring cover is connected to the display screen assembly. The lower housing assembly includes a lower housing, a grounding plate, a Phillips head screw, a standard elastic washer, a flat washer, a fourth O-ring seal, a hex socket head cap screw, a Phillips head screw, a nameplate, a retaining plate, and a Phillips countersunk screw. The upper end of the lower housing is connected to the upper cover assembly by threads, and the fourth O-ring seal is located in the sealing groove at the bottom of the thread. A standard elastic washer is located under the Phillips head screw, a flat washer is located under the standard elastic washer, and a grounding plate is located under the flat washer. The nameplate is located on the back of the lower housing. The hex socket head cap screw is screwed into the upper part of the interface assembly on the back of the lower housing. The Phillips head screw is screwed into the grounding screw hole inside the lower housing. The lens antenna assembly includes a PTFE lens antenna, a flange adapter, a fifth O-ring seal, and a shaft elastic retaining ring; the PTFE lens antenna is connected to the flange adapter; the flange adapter is connected to the interior of the lower end of the lower housing, and the lower housing and the flange adapter are sealed by the fifth O-ring seal; the shaft elastic retaining ring connects and fixes the flange adapter to the lower housing.

[0006] Furthermore, it also includes an interface assembly, which is located on the front of the lower housing assembly. The interface assembly includes a cable protection connector, a sixth O-ring seal, a plug, and a seventh O-ring seal. The cable protection connector and the plug are threaded to the lower housing and are sealed by the sixth O-ring seal and the seventh O-ring seal, respectively. The cable from the ship control system is connected to the terminal block of the measuring top cover through the cable protection connector. The cable protection connector has a sealing ring inside.

[0007] Furthermore, the materials of the lower housing, upper cover, hexagon socket head cap screws, cable protection connectors, grounding plates, Phillips head pan screws, standard elastic washers, flat washers, flange adapters, and plugs are 316L stainless steel.

[0008] Furthermore, the potting process involves encapsulating the power circuit board, main control circuit board, radio frequency circuit board, waveguide horn, and PTFE secondary lens within the main measuring housing, thus fixing them as a whole.

[0009] Furthermore, the shaft uses an elastic retaining ring to connect and fix the flange adapter to the lower housing, and the stop plate is fixed to the shaft using a cross-slot countersunk screw.

[0010] Furthermore, the radio frequency circuit board includes a filtering unit and a signal amplification unit. The filtering unit filters the signals transmitted and received by the marine liquid level radar sensor device, and the signal amplification unit amplifies the filtered signals.

[0011] Furthermore, the main control circuit board includes a data acquisition module and a data processing module. The data acquisition module converts the signal received from the radio frequency circuit board into data and transmits it to the data processing module. The data processing module processes the received data and converts it into liquid level data. During data processing, a damping filtering algorithm is used. Multiple signal processing algorithms are used to perform weighted average calculation on the received echo data.

[0012] Furthermore, the power circuit board includes a power module and a communication module. The power module is used to convert the DC power supply of the ship control system into power for each circuit board after it is connected to the DC power supply. The communication module converts the liquid level data processed by the main control circuit board into an analog current signal and communicates with the ship control system using a communication protocol.

[0013] Furthermore, the display circuit board includes an LCD display module, which displays the relevant information such as level / distance transmitted by the main control circuit board through the serial port on the LCD screen, and realizes human-computer interaction and basic parameter settings through the buttons on the mask.

[0014] Furthermore, the marine liquid level radar sensor device is an 80GHz frequency-modulated continuous wave radar sensor.

[0015] Compared with the prior art, the present invention has the following advantages: This invention uses a combination of a shaft-mounted elastic retaining ring and a stop plate to fix the lower housing to the lens antenna assembly. A cross-head pan screw with an anti-rotation design secures the upper housing to the lower housing. Potting compound is used to completely encapsulate and fix the internal components of the measurement assembly. A nylon bracket and O-rings are used to fix the display screen assembly. This effectively buffers the impact of shipboard turbulence and vibration on the radar sensor body, improving operational stability. Simultaneously, the potting compound also provides waterproofing and dustproofing for the internal electronic components of the measurement assembly.

[0016] This invention uses a lower shell, upper cover, internal hexagonal head screws, cable protection connectors, grounding plates, cross-slot pan head screws, standard elastic washers, flat washers, flange adapters, and plugs made of 316L stainless steel, and is sealed with O-rings, which significantly improves the waterproof and corrosion-resistant performance of the device, extending its service life in harsh environments such as ships with many corrosive media.

[0017] The filtering unit on the radio frequency circuit board of this invention can eliminate interference signal noise, and the amplification unit can enhance signal strength. The data processing module on the main control circuit board has a built-in data processing algorithm that can effectively suppress measurement errors caused by mechanical vibration, medium fluctuations, or ship tilting, and can provide stable, accurate, and reliable liquid level data. The communication module on the power supply circuit board enables linkage with the ship's control system, making it highly practical. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the main view half-section structure of the present invention.

[0020] Figure 2 This is an exploded view of the present invention.

[0021] Figure 3 This is an enlarged view of the grounding plate of the present invention.

[0022] In the diagram: 1-Lower housing, 2-Fifth O-ring, 3-Phillips head countersunk screw, 4-Shaft retaining ring, 5-Stop plate, 6-Measuring main housing, 7-RF circuit board, 8-Nameplate, 9-Potting compound, 10-Power circuit board, 11-Main control circuit board, 12-Phillips head pan head screw, 13-Measuring top cover, 14-Display back cover, 15-Display top cover, 16-Display circuit board, 17-LCD screen, 18-Mask, 19-Sight glass, 20-First O-ring, 21-Pressure ring, 22-Top cover, 23-Nylon bracket, 24-Second O-ring 25-Fourth O-ring seal, 26-Hex socket head cap screw, 27-Phillips head pan head screw, 28-Cable protection connector, 29-Sixth O-ring seal, 30-Ground plate, 31-Phillips head pan head screw, 32-Standard type elastic washer, 33-Flat washer, 34-Waveguide horn, 35-PTFE secondary lens, 36-Third O-ring seal, 37-Flange adapter, 38-PTFE lens antenna, 39-Plug, 40-Seventh O-ring seal, 41-Measuring assembly, 42-Display assembly, 43-Top cover assembly. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0026] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0027] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0028] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0029] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0030] like Figure 1-3As shown, the present invention provides a marine liquid level radar sensor device, including a lens antenna assembly, a lower housing assembly, a measuring assembly 41, a display screen assembly 42, and an upper cover assembly 43 arranged sequentially from top to bottom, and also including an interface assembly disposed on the front of the lower housing assembly; the lens antenna assembly includes a PTFE lens antenna 38, a flange adapter 37, a fifth O-ring seal 2, and a shaft elastic retaining ring 4; the PTFE lens antenna 38 is tightly fitted to the flange adapter 37 by means of thread and adhesive; the fifth O-ring seal 2 is fitted onto the flange adapter 37, and the flange adapter 37 is installed into the lower housing 1, and the lower housing 1 and the flange adapter 37 are sealed by the fifth O-ring seal 2; then the shaft elastic retaining ring 4 is used to connect and fix the flange adapter 37 to the lower housing 1; The lower housing assembly includes a lower housing 1, a grounding plate 30, a Phillips head screw 31, a standard elastic washer 32, a flat washer 33, a fourth O-ring seal 25, a hex socket head cap screw 26, a Phillips head screw 27, a nameplate 8, a retaining plate 5, and a Phillips countersunk screw 3. The standard elastic washer 32 is placed under the Phillips head screw 31, the flat washer 33 is placed under the standard elastic washer 32, and the grounding plate 30 is placed under the flat washer 33. These components are then screwed together into the screw holes on the back of the lower housing 1, ensuring a tight, gap-free fit. The retaining plate 5 is placed in the corresponding groove, and the shaft is fixed with an elastic retaining ring 4 using the Phillips countersunk screw 3, ensuring the lens antenna assembly is securely fixed. The nameplate 8 is affixed to the corresponding area on the back of the lower housing 1. The hex socket head cap screw 26 is fully screwed into the lower housing 1. The Phillips head screw 27 is screwed into the grounding screw hole inside the lower housing 1. The fourth O-ring seal 25 is installed on the lower housing 1. The measurement assembly 41 includes a main measurement housing 6, a top measurement cover 13, a power circuit board 10, a main control circuit board 11, a potting compound 9, an RF circuit board 7, a waveguide horn 34, a PTFE secondary lens 35, and a third O-ring 36. The main control circuit board 11 is located above the power circuit board 10, and the RF circuit board 7 is inserted into pins on the side of the main control circuit board 11. The three boards are arranged in an L-shape and connected by a hard-plug method. The third O-ring 36 is fitted into a groove on the PTFE secondary lens 35 and connects to the lens antenna assembly to form a seal. The waveguide horn 34 is fixed to the internal thread of the PTFE secondary lens 35 via threads. Circuit board 7 is fixed to waveguide horn 34 with screws. After the RF circuit board 7, waveguide horn 34, and PTFE secondary lens 35 are fixed as a whole, they are then fixed to the lower end of the main measuring housing 6 with screws. Encapsulation 9 is used to encapsulate the power circuit board 10, main control circuit board 11, RF circuit board 7, waveguide horn 34, and PTFE secondary lens 35 inside the main measuring housing 6. Then, the measuring top cover 13 is installed on the main measuring housing 6 to form measuring assembly 41. The measuring assembly 41 is fixed inside the lower housing 1 with cross-slot pan head screws 12. The top of the measuring top cover 13 is provided with connecting buckles and contacts. The display assembly 42 includes a face film 18, a display top cover 15, an LCD screen 17, a display circuit board 16, a display back cover 14, a nylon bracket 23, and a second O-ring seal 24. The face film 18 is bonded to the display top cover 15. The display circuit board 16, the LCD screen 17, and the display top cover 15 are snap-fitted together. The display top cover 15 is screwed to the display back cover 14. The display back cover 14 is provided with connecting buckles and contacts that are aligned with the connecting buckles and contacts of the measuring top cover 13 of the measuring assembly 41 and then rotated and tightened. The second O-ring seal 24 is fitted onto the nylon bracket 23, and then the nylon bracket 23 is aligned with the notch in the display top cover 15 of the display assembly 42 and pressed tightly to fix the display assembly 42. The upper cover assembly 43 includes an upper cover 22, a first O-ring seal 20, a sight glass 19, and a pressure ring 21; the pressure ring 21 presses the first O-ring seal 20 and the sight glass 19 together through the threads inside the upper cover 22; the upper cover assembly is tightened onto the upper thread of the lower housing 1 until there is no axial clearance, and then the internal hexagonal head screw 26 is screwed out in the opposite direction until it presses against the upper cover assembly 43; The interface assembly includes a cable protection connector 28, a sixth O-ring seal 29, a plug 39, and a seventh O-ring seal 40. The cable protection connector 28 and the plug 39 are threaded to the front mounting position of the lower housing 1, and are sealed by the sixth O-ring seal 29 and the seventh O-ring seal 40 respectively. The cable from the ship control system is connected to the terminal block of the measuring top cover 13 through the cable protection connector 28. The cable protection connector 28 has a sealing ring inside. Tightening the locking nut makes the rubber clamp the cable to achieve the sealing effect.

[0031] The working process of this embodiment is as follows: The marine liquid level radar sensor device is fixed to the top of the ship's liquid tank through the bolt holes of the flange adapter 37; a cable is led out from the ship's main control console and connected to the terminal block of the power circuit board 10 on the measuring component 41 through the cable protection connector 28 to power and communicate with the radar sensor; basic parameters are set through the buttons on the faceplate 18; the main control circuit board 11 sends a command to the radio frequency circuit board 7 to transmit a high-frequency radar wave signal to the PTFE secondary lens 35 through the waveguide horn 34, and then the signal is reflected after passing through the lens antenna assembly into the measured medium in the ship's tank. The reflected signal is received by the lens assembly and transmitted to the radio frequency circuit board 7 through the PTFE secondary lens 35 and the waveguide horn 34; the signal is then transmitted to the radio frequency circuit board 7 by the radio frequency circuit board. The filtering unit of circuit 7 filters the received raw signal to eliminate noise generated by ship vibration. The amplification unit amplifies the filtered signal and transmits it to the main control circuit board 11. The data acquisition module of the main control circuit board 11 converts the signal into data and transmits it to the data processing module. For ship vibration, tilting and rolling conditions, the data processing module calculates and corrects the accurate liquid level data through built-in algorithms, effectively suppressing measurement errors caused by mechanical vibration, medium fluctuations or ship turbulence. The data is then transmitted to the LCD screen 17 for display via serial port. The communication module of the power circuit board 10 converts the liquid level data processed by the main control circuit board 11 into an analog current signal and communicates with the ship control system using a communication protocol to realize real-time monitoring of the ship's cabin liquid level.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A liquid level radar sensor arrangement for a ship, characterized by: The upper cover assembly, the display screen assembly, the measuring assembly, the lower shell assembly and the lens antenna assembly are sequentially arranged from top to bottom. The upper cover assembly comprises an upper cover (22), a first O-shaped sealing ring (20), a sight glass (19) and a pressing ring (21). A sight glass window is formed in the top center of the upper cover (22), the upper part of the sight glass (19) is arranged in the sight glass window, the lower part of the sight glass (19) is arranged in the interior of the upper cover (22), the first O-shaped sealing ring (20) is arranged between the lower part of the sight glass (19) and the upper cover (22), and the pressing ring (21) is arranged below the sight glass (19). The pressing ring (21) is used for pressing the first O-shaped sealing ring (20) and the sight glass (19) through the screw thread in the upper cover (22). The upper cover (22) is connected with the upper end of the lower shell (1) through the screw thread. The display screen assembly comprises a mask (18), a display screen upper cover (15), an LCD screen (17), a display circuit board (16), a display screen rear cover (14), a nylon support (23) and a second O-shaped sealing ring (24). The mask (18) is arranged on the upper surface of the display screen upper cover (15), the display circuit board (16) and the LCD screen (17) are arranged in the interior of the display screen upper cover (15), and the lower part of the display screen upper cover (15) is connected with the display screen rear cover (14). The display screen rear cover (14) is connected with the measuring top cover (13) of the measuring assembly. The second O-shaped sealing ring (24) is sleeved on the lower part of the nylon support (23), and the connected nylon support (23) and second O-shaped sealing ring (24) are connected with the display screen upper cover (15) of the display screen assembly. The measuring assembly comprises a measuring main shell (6), a measuring top cover (13), a power supply circuit board (10), a main control circuit board (11), a glue filling (9), a radio frequency circuit board (7), a waveguide horn (34), a PTFE secondary lens (35) and a third O-shaped sealing ring (36). The main control circuit board (11) is above the power supply circuit board (10), the radio frequency circuit board (7) is inserted on the pin on the side of the main control circuit board (11), the third O-shaped sealing ring (36) is sleeved in the groove on the PTFE secondary lens (35), the waveguide horn (34) is fixedly connected with the interior screw thread of the PTFE secondary lens (35) through the screw thread, the radio frequency circuit board (7) is fixed on the waveguide horn (34), the radio frequency circuit board (7), the waveguide horn (34) and the PTFE secondary lens (35) are fixed into an integrated body, and then the integrated body is fixed to the lower end of the measuring main shell (6). The side of the measuring main shell (6) is connected with the lower shell (1), and the top of the measuring top cover (13) is connected with the display screen assembly. The lower shell assembly comprises a lower shell (1), a grounding plate (30), a cross slot button head screw (31), a standard elastic washer (32), a flat washer (33), a fourth O-shaped sealing ring (25), an internal hexagonal cylindrical head screw (26), a cross slot head screw (27), a nameplate (8), a stop piece (5), and a cross slot countersunk screw (3); the upper end of the lower shell (1) is connected with the upper cover assembly through a thread, and the fourth O-shaped sealing ring (25) is arranged in a sealing groove at the bottom of the thread; the standard elastic washer (32) is arranged below the cross slot button head screw (31), the flat washer (33) is arranged below the standard elastic washer (32), and the grounding plate (30) is arranged below the flat washer (33); the nameplate (8) is arranged on the back of the lower shell (1); the internal hexagonal cylindrical head screw (26) is screwed into the upper end of the interface assembly at the back of the lower shell (1); and the cross slot head screw (27) is screwed into a grounding hole in the lower shell (1). The lens antenna assembly comprises a PTFE lens antenna (38), a flange adapter (37), a fifth O-shaped sealing ring (2), and an elastic shaft retainer (4); the PTFE lens antenna (38) is connected with the flange adapter (37); the flange adapter (37) is connected to the inside of the lower end of the lower shell (1) and is sealed with the lower shell (1) through the fifth O-shaped sealing ring (2); and the elastic shaft retainer (4) connects and fixes the flange adapter (37) with the lower shell (1).

2. Marine liquid level radar sensor arrangement according to claim 1, characterized in that The interface assembly is arranged on the front of the lower shell assembly, and comprises a cable protection joint (28), a sixth O-shaped sealing ring (29), a plug (39), and a seventh O-shaped sealing ring (40); the cable protection joint (28) and the plug (39) are connected with the lower shell (1) through a thread, and are sealed through the sixth O-shaped sealing ring (29) and the seventh O-shaped sealing ring (40) respectively; cables from a ship control system are connected to the wiring terminals of the measuring top cover (13) from the cable protection joint (28), and the cable protection joint (28) has a sealing ring inside.

3. Marine liquid level radar sensor arrangement according to claim 1, characterized in that The materials of the lower shell (1), the upper cover (22), the internal hexagonal cylindrical head screw (26), the cable protection joint (28), the grounding plate (30), the cross slot button head screw (31), the standard elastic washer (32), the flat washer (33), the flange adapter (37), and the plug (39) are 316L stainless steel.

4. Marine liquid level radar sensor arrangement according to claim 1, characterized in that The glue filling (9) integrally fills and seals the power supply circuit board (10), the main control circuit board (11), the radio frequency circuit board (7), the waveguide horn (34), and the PTFE secondary lens (35) in the measuring main shell (6).

5. Marine liquid level radar sensor arrangement according to claim 1, characterized in that The elastic shaft retainer (4) connects and fixes the flange adapter (37) with the lower shell (1), and the stop piece (5) fixes the elastic shaft retainer (4) through the cross slot countersunk screw (3).

6. Marine liquid level radar sensor arrangement according to claim 1, characterized in that The radio frequency circuit board (7) comprises a filtering unit and a signal amplification unit, the filtering unit performs filtering processing on signals transmitted and received by the marine liquid level radar sensor device, and the signal amplification unit amplifies the filtered signals.

7. Marine liquid level radar sensor arrangement according to claim 1, characterized in that The main control circuit board (11) comprises a data acquisition module and a data processing module, the data acquisition module converts the signals processed by the radio frequency circuit board (7) into data and transmits the data to the data processing module; the data processing module processes the received data to convert the data into liquid level data; in the data processing, a damping filtering algorithm is adopted; a multiple signal processing algorithm is adopted to perform weighted average calculation on the received echo data.

8. Marine liquid level radar sensor arrangement according to claim 1, characterized in that The power supply circuit board (10) comprises a power supply module and a communication module, the power supply module is used to convert a direct current power supply connected to a ship control system into power supply for each circuit board; the communication module converts liquid level data processed by the main control circuit board (11) into an analog current signal and communicates with the ship control system by using a communication protocol.

9. Marine liquid level radar sensor arrangement according to claim 1, characterized in that, The display circuit board (16) comprises an LCD display module, the LCD display module displays relevant information such as liquid level / distance transmitted by the main control circuit board (11) through a serial port on an LCD screen (17) and realizes human-computer interaction and basic parameter setting through keys on a face mask (18).

10. Marine liquid level radar sensor arrangement according to claim 1, characterized in that The marine liquid level radar sensor device is an 80GHz frequency modulation continuous wave radar sensor.

Images