Inflatable rubber fender internal pressure detection and night vision positioning system

Abstract

The application discloses an inflatable rubber fender internal pressure detection and night vision positioning system, which comprises a fender body, inflatable openings are arranged at two ends of the fender body respectively, a pressure monitoring device is arranged on one side of the inflatable opening, the pressure monitoring device comprises a pressure sensor, a data transmission module and a data processing unit, the pressure sensor is arranged in an internal passage of the inflatable opening, a sensing end is in direct contact with internal air of the fender body, and the data transmission module sends air pressure data to the outside in a wireless mode. A fixing frame is arranged on the inflatable opening, two symmetrical night vision lamps powered by solar energy are arranged on the fixing frame, and the night vision lamps have two switchable light emitting modes, i.e., normal working and abnormal warning. The application realizes real-time monitoring of internal air pressure of the fender, accurate conversion of compression deformation, night vision positioning at night, local visual alarm of internal pressure abnormality, and the like. An operator can judge whether the internal pressure of the fender is normal or not at a long distance by observing light emitting states of the night vision lamps, and the safety and controllability of ship berthing operation are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of ship mooring technology, and in particular to an inflatable rubber fender internal pressure detection and night vision positioning system. It is mainly used to monitor the internal pressure of the inflatable rubber fender in real time and accurately calculate the amount of compression deformation during ship berthing and alongside operations, and to achieve night vision positioning and warning of the fender position at night or in environments with limited visibility. Background Technology

[0002] Inflatable rubber fenders are a widely used elastic cushioning device in ship mooring. Their basic structure typically includes a nearly barrel-shaped hollow rubber fender body filled with compressed air. The compressibility of air absorbs the impact energy during berthing or alongside the ship, thus cushioning and protecting the hull and dock structure. Compared to conventional elastic rubber fenders, inflatable rubber fenders offer significant advantages, including higher energy absorption, lower pressure per unit area on the ship, superior impact resistance, lighter weight, easier installation, and greater cost-effectiveness.

[0003] In recent years, with the increasing trend towards larger ships and the significant increase in port operation density, the safety requirements for ship berthing and alongside operations have become increasingly stringent. Traditional pneumatic rubber fenders have revealed numerous technical shortcomings during use, mainly in the following aspects: First, it lacks real-time internal pressure monitoring. Inflatable rubber fenders rely on compressed air for cushioning, and the stability of their internal air pressure directly affects their cushioning performance and operational safety. However, traditional inflatable rubber fenders are put into use immediately after inflation, and workers cannot obtain real-time information about internal air pressure changes during operation, relying only on experience for estimation and prediction. When the fender slowly leaks air due to prolonged use, or when a sudden change in internal pressure occurs due to a significant impact, it is difficult to detect and take timely countermeasures, posing a significant safety hazard.

[0004] To address this issue, some existing technologies have proposed improvement solutions. For example, Chinese utility model patent CN212667616U discloses an inflatable rubber fender, in which a pressure gauge is inserted into the outer wall of one side of the fender hull and connected to a controller via a signal line. When the pressure exceeds a warning value, the controller receives a signal and opens a safety valve to release the pressure. However, in this solution, the pressure gauge is directly inserted into the outside of the fender hull. The pressure gauge is exposed to the humid and salty marine environment for a long time, making it susceptible to corrosion and damage. Furthermore, the pressure data is only displayed on a local instrument, making remote real-time monitoring impossible.

[0005] For example, Chinese utility model patent CN208069978U discloses an inflatable rubber fender, which has an air inlet in the middle of a fixing plate at one end of the fender body, a pressure measuring tube on the air inlet, and a fixing hole for installing a pressure gauge on the pressure measuring tube. This solution also has the problems of the pressure gauge being externally mounted and easily damaged, and the inability to transmit data remotely.

[0006] Secondly, the amount of fender compression deformation cannot be accurately quantified. Inflatable rubber fenders undergo compression deformation when subjected to pressure from a ship, and the amount of this deformation is a key parameter for assessing the fender's stress state and determining safe berthing distances. However, in traditional operations, workers can only subjectively judge the degree of fender deformation based on visual inspection or experience, lacking precise quantitative data support.

[0007] Chinese invention patent application CN122196913A discloses an analytical method for estimating ship motion by integrating fender and mooring monitoring. This method uses a fusion monitoring system to collect real-time internal pressure data of the inflatable fender. However, this patent primarily focuses on estimating ship motion using internal pressure data and does not address the specific algorithm for converting internal pressure data into fender compression deformation, nor does it cover related technologies for night vision positioning of the fender end.

[0008] Third, fenders are difficult to identify and position at night and in environments with limited visibility. In complex operating environments with limited visibility, such as at night, in fog, or in dimly lit cabins, traditional inflatable rubber fenders have a single color (usually black), making them difficult to distinguish from the surrounding environment. Operators find it difficult to accurately identify the real-time position and deployment range of the fenders, which greatly hinders ship alignment and berthing operations and can easily lead to ship collisions due to positioning errors.

[0009] Fourth, internal pressure alarm information cannot be locally visualized on the fender itself. In existing technologies, when the internal pressure of an inflatable fender is abnormal, the alarm signal is typically transmitted to a remote terminal device (such as a handheld terminal or computer) for display. Operators need to check the terminal device to determine which fender is abnormal, which is extremely inconvenient in complex operational scenarios where multiple fenders are used simultaneously: operators cannot quickly identify the specific location of the abnormal fender by directly observing the fender itself from a distance. Although Chinese invention patent CN104502037B discloses a leak alarm device for soft-sealed appliances based on a pressure sensor and strain gauge, which discloses a scheme of setting an LED flashing alarm on the leak signal receiving device, this LED is set on a separate receiving device, not on the fender itself, thus failing to achieve local visualization of the alarm on the fender. Existing technologies lack an integrated solution that can simultaneously achieve night vision positioning and local visualization of internal pressure anomalies on the fender itself.

[0010] In summary, existing pneumatic rubber fenders suffer from several significant technical problems, including limited functionality, lack of real-time internal pressure monitoring, inaccurate quantification of compression deformation, low nighttime visibility, and the inability to visualize internal pressure alarm information locally on the fender itself. More importantly, current technologies involve independent installation of internal pressure monitoring and night vision warning devices, with internal pressure alarms relying on remote terminal displays. There is a lack of a systematic solution that simultaneously utilizes night vision lights as a local warning device for internal pressure anomalies. Therefore, there is an urgent need to develop an integrated pneumatic rubber fender system that combines real-time internal pressure detection, accurate calculation of compression deformation, night vision positioning, and local visualization alarms for internal pressure anomalies to effectively improve the safety and controllability of ship berthing operations. Summary of the Invention

[0011] To address the shortcomings of existing technologies, the present invention aims to provide an inflatable rubber fender internal pressure detection and night vision positioning system. This system addresses the technical problems of traditional inflatable fenders, such as limited functionality, inability to monitor internal air pressure in real time, inability to accurately quantify compression deformation, low visibility at night and in environments with limited visibility, and inability to visualize internal pressure alarm information locally on the fender itself. This system effectively improves the safety and controllability of ship berthing operations.

[0012] The above-mentioned objective of this invention is achieved through the following technical solutions: This invention provides an inflatable rubber fender internal pressure detection and night vision positioning system, including a fender body, with an inflation port at each end of the fender body, and a pressure monitoring device at each inflation port. The pressure monitoring device includes a pressure sensor, a data transmission module, and a data processing unit. The pressure sensor is disposed in the internal channel of the inflation port and is used to sense the real-time air pressure value inside the fender body. The data transmission module is electrically connected to the pressure sensor and is used to wirelessly transmit the air pressure data to the outside. The air inlet is equipped with a fixing frame, and the fixing frame is equipped with a night vision light. The control circuit of the night vision light is electrically or signal-connected to the data processing unit. The data processing unit is electrically connected to the pressure sensor and is used to receive real-time air pressure data and determine whether the internal pressure state of the fender is within a preset safe range. The night vision light has at least two switchable light emission modes: normal operation mode: when the data processing unit determines that the internal pressure is within a safe range, the night vision light operates in the first light emission state; Abnormal warning mode: When the data processing unit determines that the internal pressure exceeds the safe range, the data processing unit sends a warning signal to the night vision light, and the night vision light operates in a second light-emitting state different from the first light-emitting state.

[0013] According to one embodiment of the present invention, the first luminous state of the night vision lamp is continuous illumination, and the second luminous state of the night vision lamp is intermittent flashing illumination or illumination color different from the first luminous state.

[0014] According to one embodiment of the present invention, the data transmission module is a Bluetooth module, which can establish a wireless connection with an external display device through the Bluetooth communication protocol, transmit real-time air pressure data to the external display device and perform visualization display.

[0015] According to one embodiment of the present invention, the data processing unit is further configured to convert real-time air pressure data into real-time compression deformation of the fender according to a built-in conversion algorithm. The conversion algorithm is based on the physical properties of the inflatable rubber fender. Specifically, within the rated working pressure range of the inflatable rubber fender, there is a one-to-one functional relationship between the compression deformation of the fender and the internal air pressure. The data processing unit maps the real-time detected air pressure value to the corresponding compression deformation value through a pre-stored pressure-deformation mapping table or pressure-deformation fitting function. When the data processing unit determines that the real-time compression deformation exceeds the preset safe deformation threshold, the data processing unit also sends a warning signal to the control circuit of the night vision lamp, causing the night vision lamp to work in a second light-emitting state.

[0016] According to one embodiment of the present invention, the pressure-deformation mapping table is pre-established in the following manner: during the calibration test before the pneumatic rubber fender leaves the factory, different compression deformation amounts are applied to the fender, and the corresponding internal air pressure values ​​are recorded simultaneously to establish a correspondence table between the compression deformation amount and the internal air pressure, and the correspondence table is stored in the data processing unit. In actual use, the data processing unit calculates the corresponding real-time compression deformation based on the real-time detected air pressure value by looking up a table or interpolation.

[0017] According to one embodiment of the present invention, the pressure-deformation fitting function is pre-established in the following manner: during the calibration test before the pneumatic rubber fender leaves the factory, different compression deformations are applied to the fender, and the corresponding internal air pressure values ​​are recorded simultaneously. A functional relationship between the compression deformation and the internal air pressure is established using a mathematical fitting method, and the functional relationship is stored in the data processing unit. In actual use, the data processing unit calculates the corresponding real-time compression deformation by substituting the detected air pressure value into the functional relationship.

[0018] According to one embodiment of the present invention, the pressure monitoring device further includes an alarm unit, which is electrically connected to the data processing unit. When the data processing unit determines that the real-time air pressure value exceeds the preset upper limit of safe pressure or is lower than the preset lower limit of safe pressure, the alarm unit issues an audible and visual alarm signal.

[0019] According to one embodiment of the present invention, the pressure monitoring device further includes a temperature sensor disposed in the internal channel of the air inlet or inside the fender body, for detecting the temperature inside the fender body, and the data processing unit is electrically connected to the temperature sensor for receiving temperature data and performing temperature compensation correction on the air pressure value when converting the compression deformation.

[0020] According to one embodiment of the present invention, each end of the fender body is provided with two night vision lights, and the two night vision lights on each air inlet are symmetrically arranged with respect to the central axis of the air inlet, so as to ensure that at least one night vision light remains upright when the fender rotates at any angle.

[0021] According to one embodiment of the present invention, each of the night vision lights includes a solar panel, a battery, and an LED light emitter. The solar panel is disposed on the upper surface or side surface of the night vision light for receiving sunlight and converting it into electrical energy. The battery is electrically connected to the solar panel for storing electrical energy. The LED light emitter is electrically connected to the battery for emitting visible light when there is insufficient light. The night vision light also includes a photosensitive sensor, which is used to detect the ambient light intensity. When the ambient light intensity is lower than a preset threshold, the night vision light automatically turns on and emits light. When the ambient light intensity is higher than the preset threshold, the night vision light automatically turns off or enters a low-power standby state.

[0022] In summary, compared with the prior art, the present invention has at least one of the following beneficial technical effects: This invention enables real-time monitoring of the internal air pressure of the fender. It integrates a pressure monitoring device into the inflation end of the inflatable fender, overcoming the technical limitation of traditional fenders that cannot monitor internal air pressure in real time. During operation, workers can intuitively and accurately read the real-time pressure data inside the fender through a matching display screen, eliminating the need for manual estimation and prediction, thus greatly improving the accuracy and convenience of fender status monitoring. Compared to existing technologies where external pressure gauges are easily damaged and data cannot be transmitted remotely, the pressure monitoring device of this invention is built into the inflation port side, featuring a compact structure and good protection. It wirelessly connects to a general-purpose display device via Bluetooth, eliminating the need for dedicated receiving equipment, making it convenient and cost-effective.

[0023] This invention achieves precise quantitative calculation of fender compression deformation. Based on the dynamic changes in real-time pressure values, it uses a built-in algorithm to accurately calculate the real-time compression deformation of the fender, transforming the fender's stress and deformation state from a vague subjective judgment into precise quantitative data. This provides intuitive and reliable data support for controlling the safe distance between two vessels during berthing operations and for assessing the stress state, fundamentally mitigating risks such as ship collisions and hull wear caused by abnormal fender pressure and excessive deformation. Compared to existing technologies, the calculation algorithm of this invention is based on calibration test data of the fender before it leaves the factory, resulting in high accuracy and reliability. Furthermore, it can simultaneously display pressure values ​​and deformation on general-purpose display devices, providing intuitive and comprehensive information.

[0024] This invention enables nighttime fender positioning in environments with limited visibility. It adds night vision lights to both ends of the inflatable fender, powered by solar energy, eliminating the need for additional charging and solving the technical challenge of obtaining external power when the fender is floating or suspended. In complex operating environments with limited visibility, such as at night, in fog, or in dimly lit cabins, the night vision lights clearly highlight the real-time position of the fender and the distance between two fenders, helping operators quickly and accurately identify the fender's deployment location and coverage area. This effectively solves the problems of low fender identification and difficult positioning in poor visibility scenarios. Compared to existing nightlights that are exposed and easily damaged, and rely on external power, the night vision lights of this invention are mounted on the inflation port via a fixed bracket, making them concealed and less prone to damage. The solar power supply is self-sufficient, requiring no wiring and offering wide applicability.

[0025] The night vision lights remain upright regardless of the fender's orientation. This invention installs two night vision lights at each end of the inflatable fender, with the two lights on the same inflation port arranged symmetrically. This ensures that at least one night vision light remains upright regardless of the fender's orientation (such as rotation or tilt), guaranteeing that the night vision warning function functions normally under all circumstances.

[0026] The pressure sensor is integrated into the internal channel of the inflation port, enabling non-destructive retrofitting. This invention places the pressure sensor within the internal channel of the inflation port, fully utilizing the existing inflation channels on the inflatable fender. This eliminates the need to create new mounting holes in the fender body, avoiding the risks to airtightness, structural strength reduction, and stress concentration associated with openings. Compared to existing technologies that require pre-embedding sensors during fender manufacturing or inserting pressure gauges into the outer wall, this invention achieves non-destructive retrofitting on existing fenders, significantly reducing modification difficulty and cost, and demonstrating excellent versatility and potential for widespread adoption.

[0027] This invention achieves deep integration and coordinated control of internal pressure monitoring and night vision positioning, enabling a local visual alarm with "one light for two purposes." The pressure monitoring device, mounting bracket, and night vision light are integrated into a single functional module at the inflation port. All components share the same mounting location, resulting in a compact structure and high integration. More importantly, the control circuit of the night vision light is electrically or signal-connected to the data processing unit. The night vision light has at least two switchable illumination modes: a constant-on state for night vision positioning under normal conditions, and an automatic switching to flashing or color-changing state for warning when internal pressure is abnormal. This "one light for two purposes" coordinated control function allows operators to determine the fender's position and internal pressure status simultaneously by visually observing the illumination status of the night vision light at the fender end from a distance, without needing to check any terminal equipment. In scenarios where multiple fenders are used side-by-side, operators can quickly locate which fender is in an abnormal state by observing the illumination status of the night vision lights on each fender, greatly improving emergency response efficiency. This technical solution, which integrates night vision positioning and internal pressure alarm functions into the same lamp and achieves local visual alarm through switching of light emission states, has not been disclosed in existing technologies.

[0028] The system boasts high integration and wide applicability. This invention integrates four major functions: internal pressure detection, deformation conversion, night vision positioning, and local visual alarm for internal pressure anomalies. It can be used for the installation of new fenders as well as for the renovation and upgrading of existing fenders, demonstrating significant market potential and broad application prospects. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the inflatable rubber fender internal pressure detection and night vision positioning system of the present invention.

[0030] Figure 2 for Figure 1 A magnified view of a portion of region A in the middle.

[0031] Figure 3 This is a block diagram of the module structure of the pressure monitoring device of the present invention.

[0032] Figure 4 This is a system workflow diagram of the present invention.

[0033] Figure 5 This is a block diagram of the night vision lamp circuit of the present invention.

[0034] Reference numerals: 1. Fender body; 2. Rubber tire; 3. Chain; 4. Inflation port; 5. Pressure monitoring device; 51. Pressure sensor; 52. Data transmission module; 53. Data processing unit; 54. Alarm unit; 55. Temperature sensor; 56. Power module; 6. Fixing bracket; 7. Night vision light; 8. Flange cover plate; 9. Fender assembly. Detailed Implementation

[0035] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0036] Example 1: Overall System Structure like Figure 1 As shown, the present invention provides an inflatable rubber fender internal pressure detection and night vision positioning system, including a fender body 1. The fender body 1 is the main structure of the inflatable rubber fender, and its overall shape is approximately cylindrical or barrel-shaped. It is made of high-strength rubber material, and its interior is a sealed cavity structure for filling with compressed air. After inflation, the fender body 1 has a certain rigidity and elasticity, and can absorb impact energy through the compression and deformation of the internal air during the berthing or alongside of the ship, thus playing a buffering and protective role.

[0037] Multiple rubber tires 2 are evenly distributed on the outer wall of the fender body 1, and adjacent rubber tires 2 are connected by chains 3. As the outer protective structure of the fender body 1, the rubber tires 2 can effectively enhance the fender's wear resistance and puncture resistance, and extend the fender's service life. The chains 3 connect the rubber tires 2 together, so that they are evenly distributed along the outer wall of the fender body 1 to form a complete protective layer.

[0038] The fender body 1 has 12 sets of fender assemblies 9 evenly distributed around its circumferential outer wall, connected by chains 3. Each set of fender assemblies 9 includes 6 rubber tires 2, which are evenly spaced along the length of the fender body 1's outer wall and lie in a straight line. Specifically, the 12 sets of fender assemblies 9 are evenly arranged around the circumference of the fender body 1, with a circumferential angle of 30 degrees between adjacent sets (360 degrees ÷ 12 = 30 degrees). The 6 rubber tires 2 in each set of fender assemblies 9 are evenly spaced along the axial (length) direction of the fender body 1, forming a straight tire chain. This array-like arrangement of "12 sets × 6 tires" ensures that the outer wall of the fender body 1 is fully covered and protected by tires in all directions, providing effective cushioning and protection regardless of the angle at which the fender contacts the ship or dock.

[0039] The fender body 1 has air inlets 4 at both ends. The air inlets 4 are used to fill the fender body 1 with compressed air and are the only channel for inflation and pressure maintenance of the fender. In this embodiment, the air inlet 4 has a hexagonal cap structure, that is, the outer end of the air inlet 4 is provided with a hexagonal cap body, which makes it easy to use conventional tools such as wrenches to turn it open and close.

[0040] Reference Figure 2 A pressure monitoring device 5 is installed on one side of the air inlet 4. The pressure monitoring device 5 is used to detect the air pressure inside the fender body 1 in real time and is one of the core functional modules of the entire system.

[0041] The pressure sensor 51 of the pressure monitoring device 5 is disposed in the internal channel of the air inlet 4. The sensing end of the pressure sensor 51 extends into the internal channel of the air inlet 4 and is in direct contact with the air inside the fender body 1. A sealing ring or sealant is provided between the pressure sensor 51 and the mounting hole on the wall of the air inlet 4 to ensure the airtightness of the air inlet 4 and prevent gas leakage. Other components of the pressure monitoring device 5 (including the data transmission module 52, data processing unit 53, alarm unit 54, temperature sensor 55, and power module 56) are integrated into a sealed housing, which is fixed to the outer wall of the air inlet 4 or the mounting bracket 6.

[0042] A mounting bracket 6 is provided on the inflation port 4. The mounting bracket 6 is located outside the inflation port 4 and is fixedly connected to the outer wall of the inflation port 4. The mounting bracket 6 can be made of metal materials (such as stainless steel, aluminum alloy, etc.) or high-strength engineering plastics, and has a certain structural strength and rigidity, which can stably support and fix the night vision lamp 7. The mounting bracket 6 also constitutes the structural carrier of the pressure monitoring device 5 and the night vision lamp 7. The sealed housing of the pressure monitoring device 5 and the night vision lamp 7 are both fixedly installed on the mounting bracket 6.

[0043] The mounting bracket 6 is equipped with two symmetrically arranged night vision lights 7. The two night vision lights 7 are symmetrically arranged with respect to the central axis of the air inlet 4, that is, the two night vision lights 7 are located on both sides of the air inlet 4, and are distributed symmetrically at 180 degrees. This symmetrical arrangement ensures that at least one night vision light 7 can remain upright (i.e., the light body faces upward) when the fender rotates at any angle, thereby ensuring the continuous effectiveness of the night vision warning function.

[0044] The Night Vision Light 7 is solar-powered and requires no external charging. Each Night Vision Light 7 has a built-in solar panel and battery (the specific structure is described in detail later). The solar panel converts sunlight into electrical energy and stores it in the battery, which then powers the Night Vision Light 7. This self-powered method eliminates the need for external power cables, making it particularly suitable for inflatable fenders that float on water or are installed on the sides of ships, avoiding the problems of difficult wiring and inconvenient power access.

[0045] The control circuit of each night vision lamp 7 is electrically or signal-connected to the data processing unit 53 (the specific connection method will be described in detail later), so that the night vision lamp 7 can automatically switch the light emission mode according to the judgment result of the data processing unit 53.

[0046] The inflation port 4 is equipped with a flange, which has multiple threaded holes and a flange cover plate 8. The flange cover plate 8 is fixedly connected to the end of the inflation port 4 by bolts engaging with the threaded holes. It is used to seal and protect the end of the inflation port 4, while also providing structural support and reinforcement for the mounting frame 6 and the night vision light 7 mounted thereon. The flange cover plate 8 is removable, facilitating inflation and maintenance operations on the inflation port 4. The flange cover plate 8 is detachably connected to the end of the inflation port 4. When inflation or maintenance operations are required, only the flange cover plate 8 needs to be removed; there is no need to remove the mounting frame 6 and the pressure monitoring device 5 and night vision light 7 mounted thereon.

[0047] In this embodiment, the pressure monitoring device 5, the mounting bracket 6, and the night vision light 7 are integrated at the air inlet 4 to form an integral functional module. This integral functional module can be detachably installed on the air inlet 4 through the mounting bracket 6 without any structural modifications to the main body of the fender 1.

[0048] In this embodiment, two night vision lights 7 are provided at each end of the fender body 1, that is, a total of four night vision lights 7 are provided in the entire system (two at each end). The two night vision lights 7 on each air inlet 4 are symmetrically arranged with respect to the central axis of the air inlet 4 to ensure that the night vision lights 7 remain upright in any posture of the fender.

[0049] like Figure 3 As shown, the pressure monitoring device 5 includes a pressure sensor 51, a data transmission module 52, and a data processing unit 53.

[0050] Pressure sensor 51 is disposed in the internal channel of air inlet 4. The sensing end of pressure sensor 51 is in direct contact with the air inside fender body 1 to sense the real-time air pressure value inside fender body 1. Pressure sensor 51 can be a conventional pressure sensing element in the art, such as a diffused silicon pressure sensor, ceramic pressure sensor, or strain gauge pressure sensor, which has the characteristics of high accuracy, fast response, and corrosion resistance, and can adapt to the humid and salt spray conditions of marine environment.

[0051] The specific installation method of the pressure sensor 51 is as follows: The inflation port 4 is a hollow tubular structure, with its inner end connected to the internal cavity of the fender body 1, and its outer end equipped with a hexagonal cap structure for easy screwing. The internal channel of the inflation port 4 is used for gas filling and venting. A mounting hole is provided on one side of the tube wall of the inflation port 4, which is connected to the internal channel of the inflation port 4. The pressure sensor 51 of the pressure monitoring device 5 extends into the internal channel of the inflation port 4 through the mounting hole, so that the sensing end of the pressure sensor 51 is in direct contact with the air in the internal channel of the inflation port 4 (i.e., the air inside the fender body 1). A sealing ring or sealant is provided between the pressure sensor 51 and the mounting hole to ensure the airtightness of the inflation port 4 and prevent gas leakage from the mounting hole. This installation method makes full use of the existing inflation channel on the inflatable fender, eliminating the need to open new mounting holes on the fender body, and avoiding the airtightness risks, structural strength weakening, and stress concentration problems caused by opening holes.

[0052] The data transmission module 52 is electrically connected to the pressure sensor 51 and is used to wirelessly transmit the air pressure data detected by the pressure sensor 51. In this embodiment, the data transmission module 52 is a Bluetooth module, employing Bluetooth Low Energy (BLE) technology, which can establish a wireless connection with an external display device via the Bluetooth communication protocol. The Bluetooth module has the advantages of low power consumption, stable transmission, and strong compatibility, enabling rapid pairing and connection with most smartphones, tablets, and other general mobile terminal devices on the market.

[0053] In actual use, pressure sensor 51 continuously detects the real-time air pressure inside the fender body 1 at a set sampling frequency (e.g., once per second, five times per second, or ten times per second) and transmits the detected air pressure data to data transmission module 52. Data transmission module 52 wirelessly transmits the air pressure data to an external display device (e.g., a smartphone, tablet, or dedicated display screen) via Bluetooth. The external display device has a matching application (APP) installed, which can receive, parse, and display the air pressure data in real time for intuitive reading by the operator.

[0054] The data transmission module 52 can also connect to multiple external display devices simultaneously via Bluetooth, enabling one device to transmit data to multiple devices and multiple people to monitor simultaneously, making it convenient for on-site commanders, ship drivers and dock operators to keep track of the pressure status of the fender at the same time.

[0055] In this embodiment, the pressure monitoring device 5 further includes a data processing unit 53. The data processing unit 53 is electrically connected to the pressure sensor 51 and is used to receive real-time air pressure data detected by the pressure sensor 51, and convert the real-time air pressure data into the real-time compression deformation of the fender according to a built-in conversion algorithm. Simultaneously, the data processing unit 53 is also used to determine whether the internal pressure state of the fender is within a preset safe range based on the real-time air pressure value and / or the real-time compression deformation, and to send corresponding control signals to the control circuit of the night vision light 7 based on the determination result.

[0056] The data processing unit 53 can be a conventional data processing chip in the field, such as a microcontroller unit (MCU), a digital signal processor (DSP), or an embedded microprocessor, and has the characteristics of strong data processing capability, low power consumption, and high reliability.

[0057] The conversion algorithm built into the data processing unit 53 is based on the physical properties of inflatable rubber fenders. Specifically, within the rated working pressure range of the inflatable rubber fender (typically 0.05MPa~0.5MPa), there is a one-to-one functional relationship between the fender's compression deformation (defined as the ratio of the compressed dimension to the original dimension in the direction of force, usually expressed as a percentage) and the internal air pressure. The theoretical basis of this functional relationship is that when the inflatable rubber fender is subjected to external compressive force, its internal volume decreases. According to the ideal gas law (PV=nRT), under constant temperature conditions, the decrease in volume leads to an increase in internal pressure. Therefore, by detecting the change in internal pressure, the compression deformation of the fender can be deduced.

[0058] The data processing unit 53 maps the real-time detected air pressure value to the corresponding compression deformation value through a pre-stored pressure-deformation mapping table or pressure-deformation fitting function.

[0059] The specific explanation of the pressure-deformation mapping table is as follows: The mapping table is pre-established as follows: During the calibration test before the inflatable rubber fender leaves the factory, a universal testing machine or a dedicated compression testing device is used to apply different compression deformation amounts (such as 0%, 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, etc.) to the fender, and a high-precision pressure gauge is used to record the corresponding internal air pressure values ​​simultaneously, thereby establishing a one-to-one correspondence table between the compression deformation amount and the internal air pressure. This correspondence table is stored in the read-only memory (ROM) or flash memory of the data processing unit 53 in the form of a data array or look-up table.

[0060] As a specific example, the pressure-deformation mapping relationship obtained in the calibration test of a certain type of inflatable rubber fender is shown in Table 1 below: Table 1. Example of Pressure-Deformation Mapping Relationship

[0061] In actual use, the data processing unit 53 searches the mapping table based on the air pressure value detected in real time by the pressure sensor 51. If the detected air pressure value corresponds exactly to a certain air pressure value in the table, the corresponding compression deformation is read directly; if the detected air pressure value is between two adjacent air pressure values ​​in the table (for example, if the detected value is 0.20 MPa, it is between 0.18 MPa and 0.22 MPa), the corresponding compression deformation is calculated by linear interpolation or spline interpolation.

[0062] The alternative to the pressure-deformation fitting function is explained below: As an alternative to the aforementioned table lookup method, the pressure-deformation fitting function is pre-established in the following way: During the calibration test before the inflatable rubber fender leaves the factory, different compression deformations are applied to the fender, and the corresponding internal air pressure values ​​are recorded simultaneously. A mathematical fitting method (such as least squares polynomial fitting, spline interpolation, etc.) is used to establish the functional relationship between the compression deformation and the internal air pressure, D=f(P), where D is the compression deformation and P is the internal air pressure value. This functional relationship is stored in the read-only memory or flash memory of the data processing unit 53 in the form of program code.

[0063] In practical use, the data processing unit 53 directly substitutes the air pressure value P detected in real time by the pressure sensor 51 into the functional relationship D=f(P) to calculate the corresponding real-time compression deformation D. Taking polynomial fitting as an example, if cubic polynomial fitting is used, the functional relationship is D=a·P³+b·P²+c·P+d, where a, b, c, and d are the coefficients obtained from the fitting. The advantage of this fitting function method is that it does not require storing large data tables, occupies little storage space, and has a fast calculation speed.

[0064] In this embodiment, the pressure monitoring device 5 further includes an alarm unit 54. The alarm unit 54 is electrically connected to the data processing unit 53. The data processing unit 53 pre-stores a safe pressure upper limit (e.g., 0.45 MPa), a safe pressure lower limit (e.g., 0.08 MPa), and a safe deformation threshold (e.g., 55%). When the data processing unit 53 determines that the real-time air pressure value exceeds the safe pressure upper limit or falls below the safe pressure lower limit, or when the real-time compression deformation exceeds the safe deformation threshold, the alarm unit 54 issues an audible and visual alarm signal.

[0065] The alarm unit 54 may include LED indicator lights and a buzzer. The LED indicator lights provide visual alarm signals through different colored lights (e.g., red for alarm, green for normal, and yellow for warning); the buzzer provides audible alarm signals through different frequencies of sound. The alarm signals can promptly remind operators to pay attention to the abnormal condition of the fender and take corresponding countermeasures (such as stopping berthing operations, adding or deflating the fender, adjusting the berthing speed, etc.), thereby effectively avoiding safety accidents caused by abnormal fender pressure or excessive deformation.

[0066] In this embodiment, the pressure monitoring device 5 further includes a temperature sensor 55. The temperature sensor 55 is disposed in the internal channel of the air inlet 4 or inside the fender body 1, and is used to detect the temperature inside the fender body 1. The temperature sensor 55 can be a conventional temperature sensing element in the art, such as a thermistor, thermocouple, or semiconductor temperature sensor.

[0067] The data processing unit 53 is electrically connected to the temperature sensor 55 to receive temperature data. Since the air temperature inside the fender body 1 changes with the ambient temperature and the work done during fender compression, and this temperature change affects the air pressure (according to the ideal gas law PV=nRT, under constant volume, an increase in temperature leads to an increase in pressure), the data processing unit 53 performs temperature compensation correction on the air pressure value based on the temperature data detected by the temperature sensor 55 when calculating the compression deformation. This eliminates the influence of temperature changes on the accuracy of air pressure detection and improves the accuracy of the compression deformation calculation.

[0068] The specific method for temperature compensation correction is as follows: The data processing unit 53 takes the standard temperature (e.g., 20℃) as the reference, and corrects the measured gas pressure value according to the gas state equation based on the difference between the actual detected temperature and the standard temperature to obtain the corrected gas pressure value at the standard temperature. Then, the corrected gas pressure value is used to calculate the amount of compression deformation.

[0069] In this embodiment, the pressure monitoring device 5 also includes a power supply module 56. The power supply module 56 provides operating power to the pressure sensor 51, data transmission module 52, data processing unit 53, alarm unit 54, and temperature sensor 55. The power supply module 56 can use conventional battery power sources such as button batteries, lithium batteries, or dry cell batteries. Because each functional module of the pressure monitoring device 5 adopts a low-power design, a single button battery or lithium battery can provide power for several months or even more than a year, meeting practical usage requirements.

[0070] The power module 56 can also be electrically connected to the battery of the night vision light 7, so that the battery can power the pressure monitoring device 5, realizing unified power supply management of the entire system and further simplifying the system structure.

[0071] In this invention, the night vision light 7 is a key component for identifying the fender position at night and in environments with limited visibility, and also a key component for realizing local visual alarms for abnormal internal pressure. Preferably, the specific structure of the night vision light 7 is as follows: The night vision light 7 includes a solar panel, a battery, an LED emitter, a photosensitizer, and a lamp housing.

[0072] A solar panel is mounted on the upper or side surface of the night vision light 7 to receive sunlight and convert it into electrical energy. The solar panel can be a conventional photovoltaic power generation element in the field, such as a monocrystalline silicon solar cell, a polycrystalline silicon solar cell, or an amorphous silicon thin-film solar cell, and features high photoelectric conversion efficiency and long lifespan. The surface area of ​​the solar panel is determined based on the size and power requirements of the night vision light 7, typically ranging from 5 to 20 square centimeters.

[0073] The battery is electrically connected to the solar panel to store the electrical energy generated by the solar panel. The battery can be a conventional rechargeable battery in the field, such as a lithium-ion battery, lithium polymer battery, or nickel-metal hydride battery, and features high energy density and long cycle life. The battery capacity is determined based on the power requirements of the night vision light 7 and the range requirements for continuous cloudy and rainy days, typically ranging from 100 to 500 mAh.

[0074] The LED emitter is electrically connected to the battery and is used to emit visible light when there is insufficient light. The LED emitter uses a high-brightness light-emitting diode (LED), which has the advantages of low power consumption, high brightness, and long lifespan. In this embodiment, the LED emitter is a red or yellow high-brightness LED. Red and yellow light have longer wavelengths and strong penetration capabilities in fog and rain, making them particularly suitable for nighttime warnings in marine environments.

[0075] The photosensor is electrically connected to the control circuit of the LED emitter and is used to detect ambient light intensity. The photosensor can be a conventional photosensitive element in the art, such as a photoresistor, photodiode, or ambient light sensor. When the ambient light intensity is below a preset threshold (e.g., 10 lux), the photosensor outputs a control signal to automatically start the LED emitter; when the ambient light intensity is above the preset threshold, the photosensor outputs a control signal to automatically turn off the LED emitter or put it into a low-power standby state to conserve battery power.

[0076] The lamp housing serves as the outer casing of the night vision light 7, housing and protecting the solar panel, battery, LED emitter, and photosensor. The housing is made of transparent or semi-transparent waterproof material (such as polycarbonate PC, acrylic PMMA, etc.), offering excellent light transmittance and weather resistance. The housing features a waterproof, sealed structure with a protection rating of at least IP67 (i.e., completely dustproof and capable of normal operation after immersion in 1 meter of water for 30 minutes), adapting to the humid, salt spray, and immersion conditions of marine environments. The housing is securely connected to the mounting bracket 6 via threaded connections, snap-fit ​​connections, or bolts.

[0077] The circuit principle of Night Vision Light 7 is as follows: Figure 5 As shown. The solar panel is electrically connected to the battery via a charging management circuit, which controls the charging current and voltage to prevent overcharging. The battery is electrically connected to the LED emitter via a drive circuit, which converts the direct current from the battery into a current and voltage suitable for the LED emitter's operation. A photosensor is electrically connected to the control terminal of the drive circuit via a comparator circuit or a microcontroller, used to control the drive circuit's on / off state based on ambient light intensity.

[0078] In this invention, the control circuit of the night vision lamp 7 is electrically or signal-connected to the data processing unit 53 to realize the linkage control function of internal pressure monitoring and night vision positioning. The night vision lamp 7 has at least two switchable light emission modes: Normal operating mode: When the data processing unit 53 determines that the real-time air pressure value is within the preset safe pressure range and the real-time compression deformation is within the preset safe deformation threshold range, the data processing unit 53 sends a first control signal to the control circuit of the night vision light 7. The night vision light 7 operates in the first illumination state: that is, the LED emitter continuously emits light at a constant brightness (when the ambient light is lower than the preset threshold), performing the conventional night vision positioning function and clearly highlighting the real-time position of the fender.

[0079] Abnormal Warning Mode: When the data processing unit 53 determines that the real-time air pressure value exceeds the preset upper limit of safe pressure or falls below the preset lower limit of safe pressure, or when the real-time compression deformation exceeds the preset safe deformation threshold, the data processing unit 53 sends a second control signal (warning signal) to the control circuit of the night vision light 7. The night vision light 7 operates in a second illumination state different from the first illumination state: that is, the LED emitter switches from continuous illumination to intermittent flashing illumination (e.g., flashing 3 times per second), or switches from the current illumination color to another color (e.g., switching from yellow to red), to conspicuously alert the operator that the fender is in an abnormal internal pressure state.

[0080] By switching the illumination mode of the night vision light 7, the following technical effects are achieved: Operators do not need to check any terminal equipment; they can determine the position and internal pressure of the fender simultaneously by observing the illumination status of the night vision light 7 at the end of the fender with the naked eye from a distance. In scenarios where multiple fenders are used side by side, operators can quickly locate which fender is in an abnormal state by observing the illumination status of the night vision lights 7 on each fender, and thus take timely and targeted countermeasures. The night vision light 7 performs night vision positioning function under normal conditions and warning function under abnormal conditions, achieving "one light for two purposes" without the need for additional alarm devices, thus reducing system complexity and cost.

[0081] The overall working principle of the night vision light 7 is as follows: During the day or under sufficient lighting conditions, the solar panel receives sunlight and converts it into electrical energy, which is stored in the battery through a charging management circuit. A photosensitive sensor continuously detects the ambient light intensity. When the ambient light intensity is lower than a preset threshold (such as at dusk, at night, in foggy weather, or when entering a dimly lit cabin), the photosensitive sensor triggers the drive circuit, and the battery supplies power to the LED emitter. At the same time, the night vision light 7 automatically selects either a normal operating mode (constant light) or an abnormal warning mode (flashing / color changing) based on the control signal sent by the data processing unit 53, emitting corresponding light to clearly highlight the real-time position of the fender and to convey internal pressure status information through changes in the light emission state. When the ambient light intensity is higher than a preset threshold (such as during the day), the photosensitive sensor controls the drive circuit to shut down, and the battery stops supplying power to the LED emitter to conserve energy.

[0082] Because each inflation port 4 is equipped with two symmetrically arranged night vision lights 7, when the fender rotates or tilts, at least one night vision light 7's solar panel faces upwards or sideways toward the light source, enabling it to continuously receive light and charge; simultaneously, at least one night vision light 7's LED emitter faces upwards or sideways toward the observation direction, effectively serving as a warning. This redundant design ensures that the night vision lights 7 can operate normally in various postures.

[0083] Example 2: System Workflow like Figure 4 As shown, the working process of the inflatable rubber fender internal pressure detection and night vision positioning system of the present invention is as follows: Step S1: System Start-up. Before putting the inflatable rubber fender into use, first fill the fender body 1 with compressed air through the inflation port 4 to the rated working pressure. After inflation, install the pressure monitoring device 5 on one side of the inflation port 4, install the mounting bracket 6 on the inflation port 4, and install the night vision light 7 on the mounting bracket 6. Power on all modules of the system and start up, entering the working state.

[0084] Step S2: Real-time pressure detection. The pressure sensor 51 continuously detects the real-time air pressure value inside the fender body 1 at a set sampling frequency (e.g., 5 times per second) and transmits the detected air pressure data to the data processing unit 53 and the data transmission module 52.

[0085] Step S3: Wireless Data Transmission and Display. The data transmission module 52 (Bluetooth module) wirelessly transmits the received real-time air pressure data to an external display device (such as a smartphone, tablet, or dedicated display screen) via the Bluetooth communication protocol. The accompanying application installed on the external display device receives the air pressure data and displays the current air pressure value in real-time in numerical and / or graphical form on the display screen.

[0086] Step S4: Compression Deformation Conversion. The data processing unit 53 receives real-time air pressure data transmitted from the pressure sensor 51 and real-time temperature data transmitted from the temperature sensor 55. First, the data processing unit 53 performs temperature compensation correction on the air pressure value based on the temperature data to obtain the corrected air pressure value at the standard temperature. Then, the data processing unit 53 maps or calculates the corrected air pressure value into the corresponding real-time compression deformation amount according to the built-in pressure-deformation mapping table (as shown in Table 1) or the pressure-deformation fitting function. The converted compression deformation amount data is synchronously sent to an external display device via the data transmission module 52 and displayed simultaneously with the air pressure value.

[0087] Step S5: Safety status assessment and night vision light linkage control. The data processing unit 53 compares the real-time air pressure value with the preset upper and lower safety pressure limits, and at the same time compares the real-time compression deformation with the preset safety deformation threshold.

[0088] (1) If the real-time air pressure value is within the safe pressure range and the real-time compression deformation is within the safe deformation threshold range, the system determines that the fender is in a safe state: Alarm unit 54 does not issue an alarm signal (or issues a green normal indication signal); The data processing unit 53 sends a first control signal to the control circuit of the night vision lamp 7, and the night vision lamp 7 operates in normal working mode: that is, the LED light emitter emits light continuously at a constant brightness (when the ambient light is lower than a preset threshold), and performs the normal night vision positioning function.

[0089] (2) If the real-time air pressure value exceeds the safe pressure range, or the real-time compression deformation exceeds the safe deformation threshold, the system determines that the fender is in an abnormal state: Alarm unit 54 emits an audible and visual alarm signal; The data processing unit 53 sends a second control signal (warning signal) to the control circuit of the night vision light 7, and the night vision light 7 switches to the abnormal warning mode: that is, the LED light source switches from continuous illumination to intermittent flashing illumination (such as flashing 3 times per second), or switches from the current light color to another color (such as switching from yellow to red), so as to conspicuously remind the operator that the fender is in an abnormal internal pressure state.

[0090] Step S6: Night Vision Positioning and Local Visual Alarm. In environments with limited visibility, such as nighttime, foggy weather, or dimly lit cabins, the photosensitive sensor of the night vision light 7 detects that the ambient light intensity is lower than a preset threshold and automatically controls the LED emitter to start emitting light. Based on the control signal sent by the data processing unit 53, the night vision light 7 emits light in either normal operating mode (constantly lit) or abnormal warning mode (flashing / color changing). By observing the emitting position and spacing of the night vision light 7, operators can quickly and accurately identify the deployment location and coverage area of ​​the fenders, assisting in vessel alignment and berthing operations. Simultaneously, by observing the emitting state of the night vision light 7 (constantly lit or flashing, color changing), operators can quickly determine whether the internal pressure status of each fender is normal and accurately locate the specific location of abnormal fenders from a distance without checking any terminal equipment.

[0091] Step S7: Solar charging. During the day or under sufficient sunlight, the solar panel of the night vision light 7 receives sunlight and converts it into electrical energy, which is stored in the battery to provide power for the night vision light 7 to operate at night. The entire charging process is completed automatically without manual intervention.

[0092] Step S8: Cyclic Monitoring. Steps S2 to S7 are continuously cycled throughout the entire use of the fender to achieve real-time monitoring of the internal pressure of the fender, continuous calculation of deformation, continuous assurance of night vision positioning, and local visual alarm for abnormal internal pressure.

[0093] Example 3: Arrangement of night vision lights at both ends of the fender In this embodiment, two night vision lights 7 are installed at each end of the fender body 1, that is, a total of four night vision lights 7 are installed in the entire system. Two night vision lights 7 are installed on each inflation port 4 by means of a fixing bracket 6, and the two night vision lights 7 are arranged symmetrically at 180 degrees with respect to the central axis of the inflation port 4.

[0094] The design considerations for this layout are as follows: In actual use, inflatable rubber fenders may rotate around their central axis due to various factors such as water flow, waves, and ship collision forces. If only one night vision light is installed at one end of the fender, when the fender rotates and the night vision light is pointed downwards or to the side, the light emitted by the night vision light will be blocked by the fender body and cannot be observed by the operator, resulting in the failure of the night vision positioning function.

[0095] This invention ensures that at least one night vision light remains upright (i.e., facing upwards) or sideways towards the observation direction when the fender rotates at any angle. Specifically, as the fender rotates around its central axis, the two symmetrically arranged night vision lights rotate accordingly. Regardless of the angle of rotation, one of the two night vision lights is always located in the upper part (i.e., facing upwards or sideways), and its emitted light is not blocked by the fender body, allowing it to be clearly observed by the operator.

[0096] Furthermore, the symmetrical arrangement of the two night vision lights also provides redundancy. When one night vision light fails to function properly due to a malfunction (such as a damaged solar panel, battery failure, or LED burnout), the other night vision light can still work independently and continue to perform its night vision positioning function, thus improving the system's reliability and fault tolerance.

[0097] Example 4: Specific structure of the fixing bracket 6 and flange cover plate 8 like Figure 2 As shown, the fixing frame 6 is disposed outside the inflation port 4 and is fixedly connected to the outer wall of the inflation port 4. The fixing frame 6 can adopt the following two structural forms: Structure Type 1: The mounting bracket 6 is a ring-shaped or semi-ring-shaped support, fitted onto the outer wall of the inflation port 4, and fixedly connected to the inflation port 4 by set screws or clamps. Two night vision lights 7 are fixed on both sides of the mounting bracket 6, arranged symmetrically. The advantage of this structure is that it is easy to install and requires minimal modification to the original structure of the inflation port 4.

[0098] Structure Type Two: The mounting bracket 6 is a U-shaped or inverted U-shaped support, with its bottom fixed to the outer wall of the inflation port 4 by welding or bolts. Two night vision lights 7 are fixed to the two free ends of the U-shaped support, arranged symmetrically. The advantage of this structure is its stability and high support strength.

[0099] The inflation port 4 is equipped with a flange, which has multiple threaded holes and a flange cover plate 8. The flange cover plate 8 is a circular or annular cover plate, the diameter of which matches the outer diameter of the inflation port 4. The flange cover plate 8 is fixedly connected to the end of the inflation port 4 by bolts or threads.

[0100] The flange cover plate 8 has the following functions: sealing and protection function: the flange cover plate 8 seals the outer opening of the inflation port 4 to prevent debris, seawater, salt spray, etc. from entering the internal channel of the inflation port 4, and protects the internal structure of the inflation port 4 from pollution and corrosion; easy maintenance: the flange cover plate 8 is detachable. When it is necessary to inflate, deflate or maintain the inflation port 4, only the flange cover plate 8 needs to be removed for operation. There is no need to remove the fixing frame 6 and the night vision light 7, making the operation simple.

[0101] In this embodiment, the mounting bracket 6 and the inflation port 4 are detachably connected, facilitating the maintenance, replacement, and repair of the night vision lamp 7. Similarly, the flange cover plate 8 and the inflation port 4 are detachably connected, facilitating inflation and maintenance operations on the inflation port 4.

[0102] In this embodiment, the sealed housing of the pressure monitoring device 5 and the night vision light 7 are both mounted on the same mounting bracket 6, forming an integrated functional module. This integrated functional module can be installed on the inflation port 4 as a whole or removed from the inflation port 4 as a whole through the mounting bracket 6, without any structural modifications to the main body of the fender 1, thus achieving true "retrofitable non-destructive installation".

[0103] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A system for detecting internal pressure and night vision positioning of an inflatable rubber fender, comprising a fender body (1), characterized in that: The fender body (1) is provided with an air inlet (4) at both ends. A pressure monitoring device (5) is provided at the air inlet (4). The pressure monitoring device (5) includes a pressure sensor (51), a data transmission module (52) and a data processing unit (53). The pressure sensor (51) is located in the internal channel of the air inlet (4) and is used to sense the real-time air pressure value inside the fender body (1). The data transmission module (52) is electrically connected to the pressure sensor (51) and is used to wirelessly transmit the air pressure data to the outside. The air inlet (4) is provided with a fixing frame (6), and the fixing frame (6) is provided with a night vision lamp (7). The control circuit of the night vision lamp (7) is electrically or signal-connected to the data processing unit (53). The data processing unit (53) is electrically connected to the pressure sensor (51) and is used to receive real-time air pressure data and determine whether the internal pressure state of the fender is within a preset safe range. The night vision light (7) has at least two switchable light emission modes: Normal working mode: When the data processing unit (53) determines that the internal pressure is within a safe range, the night vision lamp (7) operates in the first luminous state; Abnormal warning mode: When the data processing unit (53) determines that the internal pressure exceeds the safe range, the data processing unit (53) sends a warning signal to the night vision lamp (7), and the night vision lamp (7) operates in a second light-emitting state different from the first light-emitting state.

2. The inflatable rubber fender internal pressure detection and night vision positioning system according to claim 1, characterized in that: The first luminous state of the night vision lamp (7) is continuous illumination, and the second luminous state of the night vision lamp (7) is intermittent flashing or luminous color different from the first luminous state.

3. The inflatable rubber fender internal pressure detection and night vision positioning system according to claim 1, characterized in that: The data transmission module (52) is a Bluetooth module, which can establish a wireless connection with an external display device through the Bluetooth communication protocol, transmit real-time air pressure data to the external display device and display it visually.

4. The inflatable rubber fender internal pressure detection and night vision positioning system according to claim 1, characterized in that: The data processing unit (53) is also used to convert the real-time air pressure data into the real-time compression deformation of the fender according to the built-in conversion algorithm. The conversion algorithm is based on the physical characteristics of the inflatable rubber fender. Specifically, within the rated working pressure range of the inflatable rubber fender, the compression deformation of the fender and the internal air pressure are in a one-to-one functional relationship. The data processing unit (53) maps the real-time detected air pressure value to the corresponding compression deformation value through a pre-stored pressure-deformation mapping table or pressure-deformation fitting function. When the data processing unit (53) determines that the real-time compression deformation exceeds the preset safe deformation threshold, the data processing unit (53) also sends a warning signal to the control circuit of the night vision lamp (7) so that the night vision lamp (7) works in the second light-emitting state.

5. The inflatable rubber fender internal pressure detection and night vision positioning system according to claim 4, characterized in that: The pressure-deformation mapping table is pre-established in the following way: during the calibration test before the pneumatic rubber fender leaves the factory, different compression deformations are applied to the fender, and the corresponding internal air pressure values ​​are recorded simultaneously. A correspondence table between the compression deformation and the internal air pressure is established, and the correspondence table is stored in the data processing unit (53). In actual use, the data processing unit (53) calculates the corresponding real-time compression deformation based on the real-time detected air pressure value by looking up a table or interpolation.

6. The inflatable rubber fender internal pressure detection and night vision positioning system according to claim 4, characterized in that: The pressure-deformation fitting function is established in advance in the following way: In the calibration test before the pneumatic rubber fender leaves the factory, different compression deformations are applied to the fender, and the corresponding internal air pressure values ​​are recorded simultaneously. The mathematical fitting method is used to establish the functional relationship between the compression deformation and the internal air pressure, and the functional relationship is stored in the data processing unit (53). In actual use, the data processing unit (53) calculates the corresponding real-time compression deformation by substituting the real-time detected air pressure value into the functional relationship.

7. The inflatable rubber fender internal pressure detection and night vision positioning system according to claim 1, characterized in that: The pressure monitoring device (5) also includes an alarm unit (54), which is electrically connected to the data processing unit (53). When the data processing unit (53) determines that the real-time air pressure value exceeds the preset upper limit of the safe pressure or is lower than the preset lower limit of the safe pressure, the alarm unit (54) issues an audible and visual alarm signal.

8. The inflatable rubber fender internal pressure detection and night vision positioning system according to claim 1, characterized in that: The pressure monitoring device (5) also includes a temperature sensor (55), which is located in the internal channel of the air inlet (4) or inside the fender body (1) to detect the temperature inside the fender body (1). The data processing unit (53) is electrically connected to the temperature sensor (55) to receive temperature data and to perform temperature compensation correction on the air pressure value when converting the compression deformation.

9. The inflatable rubber fender internal pressure detection and night vision positioning system according to claim 1, characterized in that: Two night vision lights (7) are provided at each end of the fender body (1). The two night vision lights (7) on each air inlet (4) are symmetrically arranged with respect to the central axis of the air inlet (4) to ensure that at least one night vision light (7) remains upright when the fender rotates at any angle.

10. The inflatable rubber fender internal pressure detection and night vision positioning system according to claim 1, characterized in that: Each of the night vision lights (7) includes a solar panel, a battery and an LED light source. The solar panel is disposed on the upper or side surface of the night vision light (7) for receiving sunlight and converting it into electrical energy. The battery is electrically connected to the solar panel for storing electrical energy. The LED light source is electrically connected to the battery for emitting visible light when there is insufficient light. The night vision light (7) also includes a photosensitive sensor, which is used to detect the ambient light intensity. When the ambient light intensity is lower than a preset threshold, the night vision light (7) automatically starts to emit light. When the ambient light intensity is higher than the preset threshold, the night vision light (7) automatically turns off or enters a low-power standby state.

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