Traction type motor home emergency rescue device

Abstract

The invention relates to a traction type motor home emergency rescue device, and relates to the technical field of vehicle safety. The device comprises a main control unit, a touring car body, a signal unit, a touring car safety unit and a tractor safety unit, a solar panel, a side inclination sensor, a water pressure sensor and a multi-frequency transmitter are integrated through a main control circuit board to achieve linkage control, and when it is detected that a car body inclines and exceeds the limit or is soaked in water, a distress signal is automatically triggered to inflate a self-inflating raft. Alarm and buoyancy support can be completed without manual intervention when the limo overturns or falls into water, and the survival probability of a driver or passengers in the limo is remarkably increased.

Description

Technical Field

[0001] This application relates to the field of vehicle safety technology, specifically to a towable RV emergency rescue device. Background Technology

[0002] The RV tourism industry has developed rapidly in recent years, with towed RVs becoming the mainstream due to their flexibility and economy. However, the risks of sudden emergencies such as capsizing and falling into water during operation have increased significantly. To ensure the safety of drivers and passengers, existing technologies generally employ integrated safety systems. These systems monitor the vehicle's status using attitude sensors and trigger alarms when anomalies are detected. Some solutions also incorporate inflatable buoyancy structures at the bottom of the vehicle, utilizing water pressure sensing to initiate the inflation process and delay sinking. These systems are typically powered by independent power modules and combine with cameras to collect external environmental information, forming a basic safety monitoring framework.

[0003] However, in emergency situations, it is common for drivers or passengers to be unable to actively trigger distress signals due to injury or being trapped, and the rapid sinking speed of vehicles makes it difficult for external rescue to intervene in a timely manner. Summary of the Invention

[0004] This application provides an emergency rescue device for towed RVs, which can solve the problem that the driver or passengers cannot call for help in time when a towed RV overturns or falls into water.

[0005] To achieve the above objectives, this application provides the following technical solution: This application provides a towable RV emergency rescue device, including a main control unit, an RV body, a signal unit, an RV safety unit, and a towing vehicle safety unit. The main control unit includes a main control circuit board, a solar panel, a voltage regulator inverter, and a battery. The RV body includes a camera. The signal unit includes a tilt sensor and an emergency signal multi-frequency transmitter. The RV safety unit includes a second water pressure sensor and an RV self-inflating raft. The towing vehicle safety unit includes a first water pressure sensor and a towing vehicle self-inflating raft. The solar panel is electrically connected to the main control circuit board via the voltage regulator inverter. The camera is electrically connected to the main control circuit board. The towing vehicle self-inflating raft is electrically connected to the main control circuit board via the first water pressure sensor. The RV self-inflating raft is electrically connected to the main control circuit board via the second water pressure sensor. The emergency signal multi-frequency transmitter is electrically connected to the main control circuit board via the tilt sensor. The battery is electrically connected to the main control circuit board.

[0006] Preferably, the solar panel is located on the top of the exterior of the RV body, the voltage regulator inverter is located on the top of the interior of the RV body, and the battery is located on the top of the interior of the RV body.

[0007] Preferably, the RV self-inflating raft is located at the bottom of the RV, the towing vehicle self-inflating raft is located at the bottom of the towing vehicle, the RV self-inflating raft contains four RV self-inflating airbags, and the towing vehicle self-inflating raft contains four towing vehicle self-inflating airbags.

[0008] Preferably, when the RV body is tilted more than 45 degrees to the left or right or forward or backward by the tilt sensor of the signal unit, the emergency signal multi-frequency transmitter will actively send out distress signals including but not limited to 12122 and 120.

[0009] Preferably, the camera comprises four cameras, which are respectively installed on the front, back, left, and right sides of the roof of the RV.

[0010] This application provides a towable RV emergency rescue device. This solution integrates a solar panel and a voltage regulator inverter into the main control unit to achieve solar energy conversion and stable power supply, avoiding the problem of traditional battery power running out of power and causing system failure during prolonged use. A tilt sensor monitors the RV's tilt angle in real time and automatically triggers a multi-frequency emergency signal transmitter to send a distress signal when the tilt angle exceeds a threshold, solving the problem of drivers or passengers being unable to manually call for help due to injury. First and second water pressure sensors detect the water immersion status of the tow vehicle and RV respectively, driving the self-inflating rafts of both the tow vehicle and RV to inflate synchronously, forming buoyancy support and effectively delaying the vehicle's sinking process. A camera collects external environmental information from all directions and transmits it to the main control circuit board, providing real-time imagery for remote rescue. Finally, the electrical connection between the battery and the main control circuit board ensures the system's continuous operation in a power outage environment. This design significantly shortens emergency response time, improves the coverage of rescue signals and the reliability of buoyancy support, thus providing drivers or passengers with a golden rescue window in complex aquatic environments. Attached Figure Description

[0011] Figure 1 A schematic diagram of the overall circuit structure of the emergency rescue device invented; Figure 2 This is a schematic diagram of the overall structure of the invention; Figure 3 A schematic diagram of the self-inflating airbag structure for an RV; Figure 4 A schematic diagram of the structure of the self-inflating airbag in the RV after wading through water; Figure 5 This is a schematic diagram of the structure of the self-inflating raft of the tractor unit after it has been deployed.

[0012] 1: RV body; 2: Main control circuit board; 3: First water pressure sensor; 4: Second water pressure sensor; 5: RV self-inflating air raft; 51: RV self-inflating airbag; 6: Towing vehicle self-inflating air raft; 7: Camera; 8: Tilt sensor; 9: Emergency signal multi-frequency transmitter; 10: Solar panel; 11: Voltage regulator inverter; 12: Battery; 61: Towing vehicle self-inflating airbag. Detailed Implementation

[0013] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0014] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention.

[0015] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0016] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0017] Example 1: When towed motorhomes are traveling or parked in the wild, they often face sudden emergencies such as landslides, road collapses, rollovers, or falling into water. In such scenarios, the driver or passengers may be unable to make a phone call or trigger an emergency alarm due to injury, loss of consciousness, or confined space. Furthermore, once the motorhome and tow vehicle enter water, their large weight and poor sealing make them prone to rapid sinking, resulting in a very short rescue window and a significantly reduced survival rate. While existing technologies include onboard GPS positioning and alarm systems or simple airbag devices, these generally rely on external power, lack dual attitude and immersion sensing capabilities, and lack a coordinated buoyancy support mechanism for towed vehicles, making it difficult to meet the reliable response requirements in complex terrain and frequent emergencies.

[0018] Based on the above issues, please refer to Figure 1 As shown, this application provides a towable RV emergency rescue device, including a main control unit, an RV body (1), a signal unit, an RV safety unit, and a towing vehicle safety unit. The main control unit includes a main control circuit board (2), a solar panel (10), a voltage regulator inverter (11), and a battery (12). The RV body (1) includes a camera (7). The signal unit includes a tilt sensor (8) and an emergency signal multi-frequency transmitter (9). The RV safety unit includes a second water pressure sensor (4) and an RV self-inflating raft (5). The towing vehicle safety unit includes a first water pressure sensor (3). The tractor self-inflating raft (6) is connected to the main control circuit board (2) via a voltage regulator inverter (11), and the camera (7) is connected to the main control circuit board (2). The tractor self-inflating raft (6) is connected to the main control circuit board (2) via a first water pressure sensor (3), and the RV self-inflating raft (5) is connected to the main control circuit board (2) via a second water pressure sensor (4). The emergency signal multi-frequency transmitter (9) is connected to the main control circuit board (2) via a tilt sensor (8), and the battery (12) is connected to the main control circuit board (2).

[0019] The main control unit is the control center of the entire rescue device. It is used to receive, process and respond to signals from each sensor unit and drive the execution unit to act. Its surface is covered with three-proof paint to adapt to the outdoor humid and vibration environment. The main control circuit board (2) undertakes the functions of signal fusion judgment, multi-frequency transmission scheduling and dual-path inflation timing control. Together with the solar panel (10), voltage regulator inverter (11) and battery (12), it forms an autonomous energy closed loop to ensure that it can continue to operate for no less than 96 hours in the power outage state.

[0020] The solar panel (10) is a standard polycrystalline silicon panel, each with a rated power of 110W. It is installed on the top of the RV body (1) to maximize the area exposed to sunlight. The solar panel (10) is electrically connected to the voltage regulator inverter (11) through wires. Its output is converted into a stable DC voltage after being regulated by the voltage regulator inverter (11) to power the main control circuit board (2) and charge the battery (12). The voltage regulator inverter (11) is a DC-DC voltage regulator module with MPPT (maximum power point tracking) function. Its input end is connected to the solar panel (10), and its output end is connected to the main control circuit board (2) and the battery (12). The voltage regulator inverter (11) has an integrated package structure with built-in temperature compensation circuit and overvoltage protection unit. The voltage regulator inverter (11) not only undertakes the voltage conversion function, but also improves the energy conversion efficiency by tracking the output characteristics of the solar panel (10) in real time, and automatically switches to the battery (12) power supply mode in cloudy and rainy weather to ensure that the main control circuit board (2) is always online.

[0021] The battery (12) is electrically connected to the main control circuit board (2) through wires, serving as a backup energy storage unit for the main control unit and independently supporting the operation of the entire system under no-light conditions. The battery (12), solar panel (10), and voltage regulator inverter (11) constitute a self-powered energy system, eliminating dependence on external power grids or vehicle cigarette lighter power, and improving the system's deployment flexibility and field applicability.

[0022] The RV body (1) is the main load-bearing structure of the towable RV. Its outer surface is equipped with an installation interface and wiring channel. The camera (7) is a wide-angle image sensor module with sound pickup function, a viewing angle of not less than 120°, a resolution of 1080P, and low-light enhancement and IP67 protection level. There are four cameras (7) in total, which are respectively set in the front, rear, left and right directions of the top of the RV body (1) and electrically connected to the main control circuit board (2) through shielded cables. The cameras (7) are used to collect images of the surrounding environment of the RV in real time. The acquired image data can be cached locally by the main control circuit board (2) or uploaded via the emergency signal multi-frequency transmitter (9) to assist remote rescue personnel in judging the situation on site. The design of its installation position and number takes into account both panoramic coverage and structural symmetry to avoid monitoring blind spots.

[0023] The signal unit is used to identify the emergency state and initiate the alarm process; the tilt sensor (8) is an attitude detection module based on the fusion of MEMS accelerometer and gyroscope. Its measurement axes include three axes: X (front and back), Y (left and right), and Z (vertical). The angle detection accuracy is better than ±1° and the response time is less than 100 ms; the tilt sensor (8) is fixed above the center axis inside the RV body (1), close to the center of gravity, and connected to the main control circuit board (2) through the bus; the tilt sensor (8) is used to continuously monitor the attitude change of the RV body (1) relative to the horizontal plane. When the absolute value of the tilt angle of the X-axis or Y-axis exceeds 45°, it is determined to be a rollover emergency event and sends an interrupt trigger signal to the main control circuit board (2); it forms an electrical linkage path with the emergency signal multi-frequency transmitter (9) to form an automatic response chain of attitude abnormality → signal transmission.

[0024] The emergency signal multi-frequency transmitter (9) is a wireless transmission module that supports VHF / UHF dual-band. The operating frequency coverage includes, but is not limited to, 121.5 MHz (aviation emergency frequency), 12122 kHz (China road rescue dedicated frequency) and 120 MHz (public medical emergency frequency). The transmission power is adjustable from 1 W to 5 W and has continuous automatic retransmission and channel scanning functions. The emergency signal multi-frequency transmitter (9) is connected to the main control circuit board (2) through a serial communication interface (such as UART), and the main control circuit board (2) controls the start and stop according to the signal from the tilt sensor (8). As a unified outlet for multi-source distress information, the emergency signal multi-frequency transmitter (9) transmits information that includes at least the device's unique ID, GPS positioning, and emergency type identifier SOS, ensuring that different rescue organizations can identify and respond to it.

[0025] The RV safety unit is used to ensure the floating stability of the RV body (1) after it falls into the water; the second water pressure sensor (4) is a ceramic core piezoresistive pressure sensor with a range of 0 to 200 kPa, corresponding to a water depth of about 0 to 20 m, and an IP68 protection rating. It is installed at the center of the bottom of the RV body (1); the second water pressure sensor (4) is connected to the ADC channel of the main control circuit board (2) through an analog signal line. When the pressure value is detected to be continuously higher than the threshold and the tilt sensor (8) has a large tilt angle (e.g., 5 kPa, corresponding to a water depth of about 0.5 m) for more than 3 seconds, it is determined that the RV has entered the water and outputs a valid trigger signal to the main control circuit board (2); the second water pressure sensor (4) and the RV self-inflating raft (5) form a perception-execution closed loop. Its installation position ensures that it contacts the water surface as soon as possible and avoids misjudgment due to the tilt of the RV.

[0026] The RV self-inflating raft (5) is an inflatable buoyancy platform made of high-strength TPU-coated nylon cloth. When unfolded, it has a spherical planar structure and is divided into four interconnected independent air chambers. The RV self-inflating raft (5) is set at the bottom of the RV body (1). When stored, its thickness does not exceed 10 cm. It is fixed to the chassis reserved bracket by mechanical lock and air quick connector. As a passive buoyancy support unit of the RV body (1), the RV self-inflating raft (5) has a four-chamber design that can effectively disperse the risk of local damage. Even if any air chamber fails, it can still maintain no less than 60% of the design buoyancy. Its inflation power source is a micro electric air compressor. The main control circuit board (2) controls the opening of the solenoid valve to realize automatic inflation. The whole process takes ≤10s.

[0027] The tractor safety unit is used to simultaneously ensure the buoyancy of the tractor after it falls into the water; the first water pressure sensor (3) and the second water pressure sensor (4) are of the same model and are installed in the bottom area of ​​the tractor to take into account both the independent wading of the tractor and the overall immersion of the tractor assembly in water; the first water pressure sensor (3) is connected to another ADC channel of the main control circuit board (2) through an analog signal line, and its triggering logic is the same as that of the second water pressure sensor (4); the first water pressure sensor (3) expands the system's response capability to individual tractor accidents, making the rescue device applicable to all working conditions of tractor-mounted combined vehicles, and avoiding focusing only on the RV while ignoring the risk of the tractor sinking.

[0028] The self-inflating raft (6) of the tractor and the self-inflating raft (5) of the caravan have the same structure and are designed with four inflatable bladders. The self-inflating raft (6) of the tractor is located at the bottom of the tractor and is ≤10 cm thick when folded. It is rigidly connected to the main beam of the tractor through a special bracket. The self-inflating raft (6) of the tractor and the self-inflating raft (5) of the caravan form a cooperative buoyancy system. When the tractor and the caravan are separated or enter the water together (the self-inflating raft (6) of the tractor can also be electrically connected to the power supply inside the tractor through the first water pressure sensor (3), they can be deployed independently to provide buoyancy and prevent the combined body from overturning due to the shift of the center of gravity.

[0029] The core innovation of this application lies in constructing an integrated emergency rescue architecture for tractor-trailer combined vehicles, featuring dual-source perception, dual-path execution, and energy autonomy: a multi-dimensional emergency state identification network is formed by a tilt sensor (8) and dual water pressure sensors, covering the two main types of dangers: overturning and falling into water; a parallel response execution system is formed by a multi-frequency emergency signal transmitter (9) and dual self-inflating rafts, simultaneously completing remote alarm and on-site self-rescue; and an off-grid energy system is formed by a solar panel (10), a voltage regulator inverter (11), and a battery (12), ensuring autonomous operation capability at all times. Each module achieves electrical interconnection and logical coordination through the main control circuit board (2), avoiding functional redundancy and ensuring that critical paths interact and cooperate with each other.

[0030] The working process and principle of this application are as follows: The solar panel (10) continuously collects ambient light energy, which is converted into stable AC power by the voltage regulator inverter (11). On the one hand, it powers the main control circuit board (2), and on the other hand, it charges and stores energy for the battery (12). The main control circuit board (2) periodically collects data from the tilt sensor (8). When the tilt angle in any direction exceeds 45°, it immediately drives the emergency signal multi-frequency transmitter (9) to transmit a distress signal containing location information to the preset frequency band. At the same time, the main control circuit board (2) continuously monitors the output of the first water pressure sensor (3) and the second water pressure sensor (4). Once either sensor detects the immersion pressure and it reaches the standard, it immediately triggers the solenoid valve to open, so that the corresponding self-inflating raft can be inflated and deployed within 10 seconds to form a stable buoyancy platform. The camera (7) synchronously collects images of the surrounding area, which are stored locally by the main control circuit board (2) or uploaded with the distress signal to enhance the remote situational awareness capability.

[0031] Furthermore, the specific implementation of the scheme in this application is as follows: When the towed caravan is traveling on a mountain road near a cliff, a sudden landslide occurs, and the caravan and the towed vehicle overturn and roll into the reservoir; the tilt sensor (8) detects that the Y-axis tilt angle reaches 62° at the moment of overturning and immediately sends an interrupt signal to the main control circuit board (2); after the main control circuit board (2) confirms, it starts the emergency signal multi-frequency transmitter (9) within 0.5 seconds and continuously transmits distress signals containing GPS coordinates to the 12122 kHz and 120 MHz frequency bands; almost simultaneously, the first water pressure sensor (3) and the second water pressure sensor (4) detect 18 kHz and 120 MHz of water pressure respectively within 1.2 seconds after the vehicle enters the water. With a water pressure of kPa and 21kPa, the main control circuit board (2) immediately sends an opening command to the inflation valves of the self-inflating raft (6) of the tractor and the self-inflating raft (5) of the caravan; the two self-inflating rafts fully unfold within 10 seconds, lifting the tractor and caravan above the water surface and maintaining their floating posture; the camera (7) continuously captures images of the water surface and uploads them through the transmitter, providing precise positioning and on-site video support for the rescue helicopter.

[0032] Through the above technical solutions, the RV is equipped with a tilt sensor (8) and electrically connected to the emergency signal multi-frequency transmitter (9). Therefore, it can trigger the transmission of multi-frequency distress signals within milliseconds when the RV overturns, solving the problem of delayed rescue caused by the inability of the driver or passengers to actively alarm. Since the RV body (1) and the towing vehicle are respectively equipped with self-inflating rafts controlled by water pressure sensors, each RV can independently obtain buoyancy support when it enters the water, avoiding the overall sinking of the assembly and significantly extending the golden rescue time. Since the self-powered system consisting of solar panel (10) – voltage regulator inverter (11) – battery (12) is adopted, it gets rid of the dependence on the original circuit of the RV or external power source, ensuring that the system can continue to operate under extreme conditions such as power outage and engine shutdown. Since the main control circuit board (2) uniformly schedules the camera (7), dual water pressure sensors, tilt sensor (8) and multi-frequency transmitter, it realizes the full-process automation of emergency identification, alarm, self-rescue and environmental recording, improving the consistency and reliability of system response.

[0033] like Figure 2-5 This application also provides a towable RV emergency rescue device, wherein a solar panel (10) is installed on the top outside of the RV body (1), a voltage regulator inverter (11) is installed on the top inside of the RV body (1), and a battery (12) is installed on the top inside of the RV body (1). The solar panel (10) is installed on the top of the RV body (1), on a flat area of ​​the roof surface of the RV body (1), and fixed by brackets or adhesive structures. This installation method allows the solar panel (10) to be fully exposed to natural sunlight, improving the efficiency of light collection. A waterproof sealing layer is provided between the solar panel (10) and the top of the RV body (1) to prevent rainwater from seeping into the interior of the vehicle along the installation interface. The solar panel (10) is a monocrystalline silicon and flexible thin-film photovoltaic module, and its size, power and output voltage are set according to the actual energy demand and the available area of ​​the roof. The solar panel (10) is positioned as the primary energy input source of the main control unit in this application. Its output is regulated by the voltage regulator inverter (11) and continuously supplies power to the main control circuit board (2) and each related unit, ensuring the autonomous operation capability of the entire emergency rescue device when there is no external power supply.

[0034] The voltage regulator inverter (11) regulates, filters, and converts the DC power output from the solar panel (10) into DC power that is compatible with the operating voltage of the main control circuit board (2). Its installation position is located at the top of the RV body (1), using the space under the roof lining for embedded installation or hanging fixation, which facilitates connection with the output cable of the solar panel (10) and the input terminal of the main control circuit board (2). The casing of the voltage regulator inverter (11) has an IP54 or higher protection rating, which is dustproof and splashproof. The solar panel (10), the voltage regulator inverter (11), and the battery (12) form a hierarchical energy supply mode of external acquisition-internal conversion-internal storage in space: the solar panel (10) serves as the energy source. The inlet is located on the top of the RV to maximize the capture of ambient light energy; the voltage regulator inverter (11) and the battery (12) serve as the energy processing and storage hub and are centrally located on the inner top, which shortens the distance between high and low voltage lines, reduces transmission loss and electromagnetic interference risk, and achieves physical protection and thermal management based on the structure of the RV body (1); this setting allows the main control circuit board (2) to be deployed in the same inner top area, which facilitates unified power supply, signal interconnection and maintenance; the three work together through electrical connection to form a closed-loop power supply subsystem, supporting the main control unit to perceive, logically judge and respond to emergencies of the RV body (1), signal unit, RV safety unit and tractor safety unit in real time.

[0035] like Figure 2 , 3 As shown, this application also provides a towing RV emergency rescue device, wherein the RV self-inflating raft (5) is installed at the bottom of the RV and the towing vehicle self-inflating raft (6) is installed at the bottom of the towing vehicle. The RV self-inflating raft (5) contains four RV self-inflating airbags (51), and the towing vehicle self-inflating raft (6) contains four towing vehicle self-inflating airbags (61). The RV self-inflating raft (5) can refer to a flexible inflatable structure set at the bottom of the RV body (1) to provide buoyancy support when the vehicle falls into water. Its installation position is close to the lowest point of the RV chassis so that it can respond to water pressure changes as soon as it comes into contact with the water surface. This position setting makes the water pressure signal sensed by the second water pressure sensor (4) more time sensitive, thereby shortening the delay of the main control circuit board (2) to start the inflation command. The RV self-inflating raft (5) and the RV body (1) are connected by high-strength quick-release buckles or waterproof rivets. The connection is provided with an elastic sealing pad to take into account both quick release and water tightness requirements. The RV self-inflating airbags (51) can be folded and stored in the bottom RV self-inflating raft (5) when not inflated. After inflation, they unfold synchronously in the horizontal and vertical directions to form a stable support surface.

[0036] The RV self-inflating raft (5) contains four RV self-inflating airbags (51) that are independently sealed and share the same air intake manifold but are isolated by one-way valves. The sub-airbags are arranged in a matrix in two rows and two columns, corresponding to the four areas of the RV bottom: front left, front right, rear left, and rear right. This arrangement allows the buoyancy load to be distributed approximately evenly on the RV chassis, reducing the risk of secondary overturning caused by sudden changes in local buoyancy. Each RV self-inflating airbag (51) is a spherical structure with a combined buoyancy more than three times that of the RV. The inflation medium is air or nitrogen. The sub-airbags are connected by a flexible... The four-airbag structure is separated by a diaphragm or reinforcing ribs, ensuring both independent failure isolation capability and maintaining overall structural deformation coordination. The first configuration includes two airbags: a front double airbag and a rear double airbag, with the front double airbags inflated in tandem via a horizontal connecting tube, and the rear double airbags inflated in tandem via another horizontal connecting tube, maintaining airway isolation between the two groups; the second configuration includes two airbags in a left row and two airbags in a right row, with the left double airbags inflated in tandem via a vertical connecting tube, and the right double airbags inflated in tandem via another vertical connecting tube, maintaining airway isolation between the left and right groups. The above configurations can be selected according to actual assembly space and center of gravity distribution requirements.

[0037] A preferred embodiment, such as Figure 1-5 The specific implementation of the scheme in this application is as follows: During a trip on a mountain road near water, the towed caravan encountered a sudden landslide, causing the entire vehicle to lose control, run off the road, and roll into the reservoir; the caravan body (1) entered the water first, and the second water pressure sensor (4) output an over-limit signal within 120 ms after contacting the water surface. The main control circuit board (2) determined that the water-falling event was established and immediately started the inflation program of the caravan's self-inflating raft (5); 0.9 s later, the caravan's self-inflating raft (5) was fully deployed, and the four caravan self-inflating airbags (51) were simultaneously pressurized to 20 kPa, and the bottom of the caravan obtained uniform upward buoyancy, preventing further overturning and sinking; about 0.3 s later, the towed vehicle entered the water, the first water pressure sensor (3) triggered a response, and the towed vehicle's self-inflating raft (6) began to inflate, 1.1 After s, all four self-inflating airbags (61) of the tractor were deployed, the rear of the tractor was lifted, and the whole vehicle was in a stable floating posture with a slight forward tilt; at this time, the camera (7) continuously transmitted water surface images, the tilt sensor (8) detected that the tilt angle of the whole vehicle was maintained within 12°, the emergency signal multi-frequency transmitter (9) was not triggered by mistake, and the system was in a controllable rescue state.

[0038] Through the above technical solutions, this application achieves the following: the self-inflating raft (5) of the RV is set at the bottom of the RV and the self-inflating raft (6) of the towing vehicle is set at the bottom of the towing vehicle, which shortens the response path of the water pressure sensor and the force arm of the airbag, and improves the buoyancy generation speed and attitude control accuracy; the self-inflating raft (5) of the RV contains four independent self-inflating airbags (51) of the RV and the self-inflating raft (6) of the towing vehicle contains four independent self-inflating airbags (61) of the towing vehicle, which can still maintain effective buoyancy output under single-point damage conditions, and enhance the survivability and emergency reliability of the system in complex water environment.

[0039] In another possible implementation, when the RV body (1) tilts more than 45 degrees to the left or right or forward or backward, the emergency signal multi-frequency transmitter (9) will actively send out distress signals including but not limited to 12122 and 120. The tilt sensor (8) is used to detect the attitude angle of the RV body (1) relative to the horizontal plane in real time. It is a dual-axis tilt sensor based on MEMS technology, or a six-axis attitude sensor integrating an accelerometer and a gyroscope, or a mechanical pendulum tilt switch that works by gravity sensing. The tilt sensor (8) is installed inside the RV body (1) near the center of gravity. On the rigid structure, it is used to sense the static tilt angle of the RV body (1) in the left-right direction (i.e., Y-axis) or the front-back direction (i.e., X-axis); its output signal is sent to the main control circuit board (2) for threshold judgment after analog-to-digital conversion. When the tilt angle in any direction exceeds 45 degrees for 2 seconds, it is judged as a critical posture state. This function is positioned as the primary sensing node for abnormal vehicle posture. It forms the smallest closed-loop link of perception-judgment-response with the main control circuit board (2). By quantifying the tilt angle into an electrical signal and setting a clear trigger boundary, the system has the ability to identify high-risk accidents such as rollover, skidding, and falling.

[0040] The multi-frequency emergency signal transmitter (9) is an emergency communication module with multi-band wireless transmission capability. Its working frequency band covers multiple civilian and special rescue frequency bands. The multi-frequency emergency signal transmitter (9) is electrically connected to the main control circuit board (2). After receiving the start command from the main control circuit board (2), it immediately calls the built-in protocol stack to generate a standard format distress message and simultaneously broadcasts to multiple frequency bands, including the distress code SOS and the domestic general emergency rescue code 120. It achieves logical linkage with the tilt sensor (8) through the main control circuit board (2): the tilt sensor (8) only provides the attitude over-limit event trigger signal and does not participate in the signal encoding and transmission process. All communication protocol parsing, message encapsulation and multi-frequency concurrent control are coordinated and completed by the main control circuit board (2). This function is positioned as an execution terminal for the external dissemination of emergency information. Through the multi-frequency redundant transmission mechanism, it improves the signal penetration and reception probability, and can still ensure basic communication connectivity in complex terrain, electromagnetic interference or single network paralysis scenarios.

[0041] The tilt sensor (8) continuously collects tilt angle data of the RV body (1) in the X and Y directions and uploads the original attitude information to the main control circuit board (2) at a sampling frequency of 10 Hz. The main control circuit board (2) has a built-in attitude calculation algorithm, performs sliding average filtering on 3 consecutive frames of valid data, and compares it with the preset ±45° hard threshold. Once it is confirmed that the limit is exceeded and the duration meets the anti-jitter delay condition, it immediately sends a high-level enable signal to the emergency signal multi-frequency transmitter (9). After the emergency signal multi-frequency transmitter (9) is powered on, it completes crystal oscillator start-up, radio frequency calibration and channel initialization within 100 ms, and completes at least 3 cross-band cyclic broadcasts within the first second. Each broadcast includes a unique device identification code, GPS positioning coordinates (if the main control unit is connected to a GPS module), event type identifier and preset emergency call codes 12122 and 120. The entire trigger-response link does not require manual intervention and does not rely on external network infrastructure. It can complete the end-to-end alarm by relying only on local power supply and wireless channel.

[0042] In an optional embodiment, the solution of this application is specifically implemented as follows: When a towed RV encounters a sudden landslide while driving on a mountain road, causing the right front wheel to be suspended in the air and the vehicle body to tilt irreversibly to the right, the tilt sensor (8) detects that the Y-axis tilt angle rapidly increases from 5° to 52° within 0.8 seconds and remains there; the main control circuit board (2) confirms that it has entered a critical state after filtering and threshold discrimination, and then outputs an enable signal; after receiving the signal, the multi-frequency transmitter of the emergency signal (9) sends short messages containing SOS to the road search and rescue unit in sequence on multiple frequency bands, and pushes an encrypted voice alarm containing the 120 code to the local 120 command center on the 800 MHz public network band; multiple signals are sent in parallel, which significantly increases the probability that different rescue entities will be aware of the danger at the same time. This application also provides a camera (7) consisting of four cameras, which are respectively set in the front, back, left and right directions on the top of the RV. The camera (7) can refer to an optical imaging device used to collect image information of the surrounding environment of the RV body (1). Its core function is to convert light signals into electrical signals and output them to the main control circuit board (2) for subsequent processing. The camera (7) is positioned as an environmental perception front-end unit in this application, and works with the main control unit to form a real-time monitoring subsystem. The camera (7) is connected to the video input interface of the main control circuit board (2) through electrical connection, and establishes a stable image data transmission path with the main control circuit board (2), thereby realizing continuous uploading of video streams and command response. The camera (7) is installed at the front and rear of the RV's exterior top. The optical axes of each camera (7) are aligned with the forward, backward, left, and right directions of the RV, respectively, thus forming an orthogonal coverage layout in space. This arrangement allows the field of view of the four cameras (7) to be spliced ​​together to cover the 360° horizontal panoramic area of ​​the RV body (1), eliminating the visual blind spots of single-point monitoring. Each camera (7) is fixedly connected to the RV body (1) through a waterproof and shockproof bracket. The bracket is made of aluminum alloy or reinforced nylon material and has an IP67 protection rating, ensuring structural stability and clear imaging under complex outdoor conditions such as bumps, rain, and high temperatures.

[0043] Four cameras (7) are respectively set in the front, back, left, and right directions of the roof of the RV. It can be understood that: the front camera (7) is installed at the center of the front end of the roof of the RV, the rear camera (7) is installed at the center of the back end of the roof of the RV, the left camera (7) is installed at the center of the left edge of the roof of the RV, and the right camera (7) is installed at the center of the right edge of the roof of the RV. This spatial distribution relationship allows the images captured by each camera (7) to generate a panoramic bird's-eye view in the main control circuit board (2) through the image stitching algorithm, and can also independently view the real-time images in any direction. The power supply lines and signal cables of each camera (7) are laid along the cable trays on the inner wall of the roof of the RV and led out to the external installation position through the sealed through-cabin connector to avoid the cables being exposed and causing wear or water ingress. The communication protocol between the camera (7) and the main control circuit board (2) is the MIPICSI-2 interface standard or the LVDS serial interface standard. This application embodiment does not make any special limitation on this. The working voltage of the camera (7) is 3.3V DC or 5V. DC; The camera (7) has a hydrophobic coating on its outer shell to reduce the impact of rainwater on image quality; This arrangement is suitable for various usage scenarios such as high-speed driving, off-road crossing, and camping of towed RVs. Because it is installed at a high position on the top, it effectively avoids the risks of ground dust, mud splashing and low-level collisions, and improves the long-term reliability and maintenance convenience of the equipment.

[0044] After the four cameras (7) are started synchronously, they respectively collect environmental image frames in their respective directions and upload the video data stream to the main control circuit board (2) in real time through parallel or time-division multiplexing. The main control circuit board (2) has a built-in image processing unit to perform time stamp alignment, distortion correction and edge fusion processing on the received four video streams to generate a continuous, ghost-free panoramic image. This image can be stored locally in the embedded storage module powered by the battery (12) or uploaded to the remote rescue platform through the communication channel of the emergency signal multi-frequency transmitter (9) or an independent wireless module. When the tilt sensor (8) detects that the RV body (1) has overturned or tilted severely, the main control circuit board (2) automatically triggers the high frame rate recording mode of the corresponding direction camera (7) to enhance the integrity of the image evidence during critical periods.

[0045] As an optional embodiment, the specific implementation of the solution in this application is as follows: During the process of the RV driving into the mountain road, the forward camera (7) continuously monitors the curvature of the road ahead and the distance to obstacles, the rear camera (7) provides real-time feedback on the towing status and the situation of vehicles coming from behind, and the left and right cameras (7) respectively monitor the traffic situation of adjacent lanes and the clearance on the side of the vehicle body; when the RV tilts due to the slippery road surface and triggers the side tilt sensor (8) alarm, the main control circuit board (2) immediately locks the original video frames of each camera (7) 10 seconds before the incident, and packages and compresses them before sending a distress signal containing geographical location information and a thumbnail of the first key image to the 12122 traffic rescue platform and the 120 medical emergency platform through the emergency signal multi-frequency transmitter (9); the rescuers can quickly determine the accident type, the location of the trapped person and the characteristics of the surrounding environment, which significantly improves the efficiency of emergency response.

[0046] Through the above technical solutions, this application achieves the following: cameras (7) are installed on the top of the RV in four directions (front, rear, left, and right) to construct a 360° environment perception system without blind spots, solving the problem of incomplete understanding of the surrounding dynamics caused by the limited field of view of a single camera (7); each camera (7) is connected to the main control circuit board (2) through electrical connection and supports synchronous acquisition and fusion processing, automatically locking and transmitting key images in critical situations such as overturning, enhancing the technical support capability for accident tracing and liability determination; the cameras (7) are installed at a high position on the top of the RV and equipped with a waterproof and shockproof structure to avoid ground interference factors and ensure all-weather imaging stability and equipment lifespan.

[0047] In summary, although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A towable RV emergency rescue device, comprising a main control unit, an RV body (1), a signal unit, an RV safety unit, and a towing vehicle safety unit, characterized in that: The main control unit includes a main control circuit board (2), a solar panel (10), a voltage regulator inverter (11), and a battery (12); the RV body (1) includes a camera (7); the signal unit includes a tilt sensor (8) and an emergency signal multi-frequency transmitter (9); the RV safety unit includes a second water pressure sensor (4) and an RV self-inflating raft (5); the towing vehicle safety unit includes a first water pressure sensor (3) and a towing vehicle self-inflating raft (6); the solar panel (10) is connected to the voltage regulator inverter (12). 1) Electrically connected to the main control circuit board (2), the camera (7) is electrically connected to the main control circuit board (2); the tractor self-inflating raft (6) is electrically connected to the main control circuit board (2) through the first water pressure sensor (3), the RV self-inflating raft (5) is electrically connected to the main control circuit board (2) through the second water pressure sensor (4); the emergency signal multi-frequency transmitter (9) is electrically connected to the main control circuit board (2) through the tilt sensor (8), and the battery (12) is electrically connected to the main control circuit board (2).

2. The towing RV emergency rescue device according to claim 1, characterized in that, The solar panel (10) is located on the top outside of the RV body (1), the voltage regulator inverter (11) is located on the top inside of the RV body (1), and the battery (12) is located on the top inside of the RV body (1).

3. The towing RV emergency rescue device according to claim 1, characterized in that, The self-inflating raft for the RV (5) The self-inflating raft (6) for the towing vehicle is located at the bottom of the exterior of the RV. The self-inflating raft (5) for the RV contains four self-inflating airbags (51), and the self-inflating raft (6) for the towing vehicle contains four self-inflating airbags (61).

4. The towing RV emergency rescue device according to claim 1, characterized in that, When the tilt sensor (8) of the signal unit tilts the RV body (1) by more than 45 degrees to the left or right or front or back, the emergency signal multi-frequency transmitter (9) will actively send out distress signals including but not limited to 12122 and 120.

5. The towing RV emergency rescue device according to claim 1, characterized in that, The camera (7) comprises four cameras, which are respectively set in the front, back, left and right directions on the top of the RV.

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