Automatic pop-up type recyclable automobile emergency flood prevention air bag system

Abstract

The invention discloses an automatic pop-up type recyclable automobile emergency flood prevention air bag system which comprises a water level detection module, an air bag inflation module and a vector propulsion module. The water level detection module comprises a water level sensor and an ultrasonic water level gauge and is used for detecting the fording depth. The water level detection module has three-level early warning, and during first-level early warning, an instrument panel displays a yellow warning icon and synchronously gives a voice prompt; during the second-stage early warning, the air bag inflation module is prepared to pop up in advance; and during third-level early warning, the air bag inflation module automatically pops up to lift the vehicle. The air bag inflation module comprises an air bag unit, an inflation unit and a recovery unit, and the vector propulsion module comprises a double-propeller propulsion and control center. The system further comprises an air suspension unit and a six-axis IMU detection unit, and the six-axis IMU detection unit monitors the posture of a vehicle body. The air bag is matched with an automobile air suspension unit, automobile bumping caused by ejection of the air bag can be reduced, and potential safety hazards are reduced.

Description

Technical Field

[0001] The present invention relates to automotive airbag technology, and in particular to an automatically pop-up and recyclable automotive emergency flood control airbag system. Background Art

[0002] Compared with traditional fuel vehicles, the battery of a new energy vehicle is usually integrated under the chassis. The lower center of gravity makes the vehicle turn more steadily and has better controllability, but it will cause the overall height to decrease.

[0003] When encountering heavy rain or waterlogged sections, users may worry about the safety of the battery. Although the existing battery packs have sealed designs and structural protection, when encountering a relatively large wading depth (such as when the water level exceeds half of the tire), they may not be able to continue driving.

[0004] A new energy vehicle with a flood control function proposed in Chinese patent application with publication number CN111873953A. In this patent, a lifting device and a floating device are provided at the bottom of the vehicle body. The lifting device is used to lift the vehicle, and the floating device is used to make the vehicle float on the water surface. It also includes a controller for controlling the lifting device and the floating device.

[0005] However, the cost of setting up a lifting device at the bottom of the vehicle is relatively high. In view of this, there is a need for further improvement in the existing technology. Summary of the Invention

[0006] In summary, the present invention proposes an automatically pop-up and recyclable automotive emergency flood control airbag system, which combines with the automotive air suspension and the airbag unit to achieve automotive emergency flood control.

[0007] The technical solution of the present invention is realized as follows: An automatically pop-up and recyclable automotive emergency flood control airbag system includes a water level detection module, an airbag inflation module, and a vector propulsion module. It is characterized in that the water level detection module includes a water level sensor and an ultrasonic water level gauge for detecting the wading depth. The water level detection module has three-level early warnings. When the first-level early warning occurs, a yellow warning icon is displayed on the dashboard, and a synchronous voice prompt is given. When the second-level early warning occurs, the airbag inflation module prepares for pre-pop-up. When the third-level early warning occurs, the airbag inflation module automatically pops up to lift the vehicle. The airbag inflation module includes an airbag unit, an inflation unit, and a recovery unit. The vector propulsion module includes dual propeller propulsion and a control center.

[0008] Preferably, it further includes an air suspension unit and a six-axis IMU detection unit. Among them, the air suspension unit includes a left front air suspension, a left rear air suspension, a right front air suspension, and a right rear air suspension. The six-axis IMU detection unit monitors the vehicle body attitude in real time. During the secondary warning, the six-axis IMU detection unit monitors the vehicle body attitude. When the roll angle is less than the threshold, the pressure difference between the left and right air suspensions is adjusted to offset the lateral moment. When the pitch angle is less than the threshold, the pressure difference between the front and rear air suspensions is controlled to limit the sinking speed of the vehicle head.

[0009] Preferably, during the tertiary warning, when the airbag unit is deployed, the air suspension unit actively releases pressure to 200 kPa to buffer the impact.

[0010] Preferably, the stroke control pressure difference of the left front air suspension, the left rear air suspension, the right front air suspension, and the right rear air suspension is as follows. The dynamic equation of the vehicle chassis is constructed as follows: In the formula, F i 、 F si and F di are the suspension force, the air spring force, and the damping force of the vehicle respectively. Z b is the vertical displacement in one direction at the centroid position. I f and I r are the distances from the front and rear axles to the centroid respectively; B f and B r are the wheelbases of the front and rear axles respectively. and are the roll angle and the pitch angle of the unsprung mass respectively.

[0011] Preferably, the airbag unit specifically includes a chassis floating airbag, a left side balance airbag, and a right side balance airbag. When the roll angle is greater than the threshold, the pressure difference between the left and right air suspensions and the inflation volume difference between the left and right side balance airbags jointly generate a reverse moment. When the pitch angle is greater than the threshold, the pressure difference between the front and rear air suspensions, and the inflation volume of the chassis floating airbag cooperate to adjust the inclination angle of the rear double propellers to generate a lifting moment.

[0012] Preferably, the chassis floating airbag is U-shaped and surrounds the vehicle head. After inflation, it forms a hull structure. The bilateral balance airbags are installed on both sides of the vehicle, and reflective strips and distress signal alarms are integrated on the bilateral balance airbags.

[0013] Preferably, the inflation unit includes an electric high-pressure air pump, a high-pressure gas storage tank, a pressure distributor, a one-way valve, and the pressure detection controller monitors and replenishes the high-pressure gas storage tank in real time.

[0014] Preferably, both the chassis floating airbag and the bilateral balance airbag are made of aramid fiber material with a double-layer TPU coating.

[0015] Preferably, a one-way drain valve is integrated at the bottom of the car door and automatically opens when the vehicle floats to prevent water from entering the vehicle interior.

[0016] Preferably, a micro water pump is configured under the car seat to quickly drain seepage water.

[0017] Preferably, when the airbag unit unfolds, it automatically cuts off the high-voltage circuit to prevent electric leakage.

[0018] Preferably, when the propeller propulsion encounters resistance, it immediately reverses to get out of trouble and prevent entanglement.

[0019] Preferably, the sensor cable uses twisted pair + metal braided layer to reduce in-vehicle electromagnetic interference.

[0020] Preferably, the surface of the sensor is coated with a hydrophobic nano-coating to prevent misjudgment caused by sediment attachment.

[0021] Implementing this automatic pop-up recyclable automotive emergency flood control airbag system of the present invention has the following beneficial effects: The automatic pop-up recyclable automotive emergency flood control airbag system of the present invention has multiple-level warnings and, in cooperation with the automotive air suspension unit, can reduce the bumps caused by the airbag pop-up and reduce potential safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a structural block diagram of the automatic pop-up recyclable automotive emergency flood control airbag system of the present invention; Figure 2 is an installation schematic diagram of the airbag unit of the present invention; Figure 3 is a structural schematic diagram of the inflation unit of the present invention; Figure 4 is a flow block diagram of the automatic pop-up recyclable automotive emergency flood control airbag system of the present invention; Figure 5 is a control principle block diagram of the air suspension unit of the present invention; Figure 6 is a simplified structural diagram of the air suspension unit of the present invention; The reference signs are represented as: water level detection module 10, water level sensor 11, ultrasonic water level gauge 12, electrode sensor 13, airbag inflation module 20, airbag unit 21, chassis floating airbag 21A, bilateral balance airbag 21B, inflation unit 22, recovery unit 23, vector propulsion module 30, dual propeller propulsion 31, control center 32, GPS positioning communication 33, air suspension unit 40, six-axis IMU detection unit 50. DETAILED DESCRIPTION OF THE INVENTION

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0024] Compared with traditional fuel vehicles, the battery of new energy vehicles is usually integrated under the chassis. The low center of gravity makes the vehicle turn more stably and has better handling performance, but it will cause the overall height to decrease. When encountering heavy rain or waterlogged roads, users may worry about the safety of the battery. Although the existing battery packs have sealing designs and structural protection, when encountering a relatively large wading depth, they may not be able to continue driving. The existing cars with flood control functions need to set up lifting devices at the bottom, which is costly.

[0025] Embodiment 1 Referring to Figure 1 As shown, this automatic pop-up recyclable emergency flood control airbag system for vehicles in this embodiment includes a water level detection module 10, an airbag inflation module 20, and a vector propulsion module 30.

[0026] The water level detection module 10 includes a water level sensor 11, an ultrasonic water level gauge 12, and an electrode sensor 13. Among them, the water level sensor 11 is installed at the bottom of the vehicle to detect the wading depth. It is arranged at the four corners of the vehicle chassis and eliminates the interference of road surface bumps through differential measurement. The ultrasonic water level gauge 12 is installed inside the front and rear bumpers, with a transmission frequency of 40 kHz and a detection range of 0.1 - 5 m. Combining with a temperature compensation algorithm, it eliminates the influence of water temperature on the sound speed. The electrode sensor 13 has a double-electrode design, with an electrode spacing of 10 cm. It judges the immersion state through the change of water body conductivity, and the threshold is set to 200 μS / cm for fresh water and 5000 μS / cm for salt water.

[0027] Preferably, the sensor cable adopts twisted pair + metal braided layer to reduce in-vehicle electromagnetic interference.

[0028] Preferably, the surface of the sensor is coated with a hydrophobic nano-coating (contact angle > 150°) to prevent misjudgment caused by sediment attachment.

[0029] In this embodiment, the water level detection module 10 has a three-level early warning mechanism. When the wading depth is 30 cm, a first-level early warning is given, a yellow warning icon is displayed on the dashboard, and a synchronous voice prompt is given; when the wading depth is 40 cm, the airbag inflation module 20 is pre-pop-up ready; when the wading depth is 50 cm, the airbag inflation module 20 automatically pops up to lift the vehicle.

[0030] Further, referring to Figure 2As shown, the airbag inflation module 20 includes an airbag unit 21, an inflation unit 22, and a recovery unit 23. The airbag unit 21 has a split structure and includes a chassis floating airbag 21A and bilateral balance airbags 21B. The chassis floating airbag 21A is U-shaped and surrounds the front of the vehicle, forming a hull structure after inflation. The bilateral balance airbags 21B are installed on both sides of the vehicle to prevent rollover, and a reflective strip + distress signal alarm is integrated on the bilateral balance airbags 21B.

[0031] Preferably, both the chassis floating airbag 21A and the bilateral balance airbags 21B are made of double-layer TPU-coated aramid fiber material.

[0032] In this embodiment, referring to Figure 3 As shown, the inflation unit 22 includes an electric high-pressure air pump, a high-pressure gas storage tank, a pressure distributor, and a one-way valve. The pressure detection and control controller monitors and supplements the high-pressure gas storage tank in real time to ensure that the internal pressure of the airbag is sufficient for a longer time.

[0033] In this embodiment, the vector propulsion module 30 includes a dual propeller propulsion 31 and a control center 32. The dual propeller propulsion 31 has a front-mounted steerable ducted propeller to provide the main thrust, and a rear-mounted ducted thruster to assist in steering and reversing. The propeller propulsion 31 is separately connected to two waterproof brushless motors and a backup battery, with a single peak power of 3 kW, ensuring that it can provide power for the vehicle. Among them, the control center 32 is connected to the vehicle-mounted central control and can display real-time working conditions such as water depth / battery power / thrust vector, etc.

[0034] Preferably, the control center 32 can also be connected to the steering wheel to switch to the manual mode, and through manual operation, control the direction integrated rocker to precisely control and get out of the wading area.

[0035] Preferably, the vector propulsion module 30 further includes a GPS positioning and communication 33. When the control center 32 switches to the automatic mode, it automatically drives towards the nearest high ground according to the GPS positioning. And it can cooperate with the vehicle's millimeter-wave radar for obstacle avoidance.

[0036] Preferably, a one-way drainage valve is integrated at the bottom of the car door and automatically opens when the vehicle floats to prevent water from entering the vehicle interior.

[0037] Preferably, a micro water pump is configured under the car seat to quickly drain the seepage water.

[0038] Preferably, when the airbag unit 21 unfolds, it automatically cuts off the high-voltage circuit to prevent electric leakage.

[0039] Preferably, when the propeller propulsion 31 encounters an obstacle, it immediately reverses to get out of trouble and prevent entanglement.

[0040] In this embodiment, referring to Figure 4As shown, this automatic pop-up recyclable automotive emergency flood control airbag system of the present invention can ensure the maximum protection of the safety of vehicle occupants in wading emergencies. Its working process can be divided into three stages: Warning stage: When the vehicle enters a wading section, four groups of water level sensors distributed on the chassis work in coordination with the ultrasonic sensors on the front and rear bumpers to monitor the water level change in real time. Once the water level reaches the 30 cm threshold, the system immediately activates the first-level warning mechanism: the dashboard switches to a red warning interface, displaying a real-time water level heat map and a recommended detour route. If it is determined to be a short-term wading scenario, the airbag deployment is not triggered temporarily to avoid misoperation.

[0041] If the water level continues to rise to 40 cm, it enters the pre-start state at this time. The pressure in the high-pressure gas storage tank is detected by the pressure detection controller to be ≥18 Mpa; the waterproof brushless motor works normally and the blades are not stuck; and the battery level of the backup battery pack is >90%.

[0042] Automatic pop-up stage: If the water level continues to rise to 50 cm and remains above for more than 2 seconds, the high-pressure air pump runs at full speed of 2800 rpm, and the 4 m³ TPU-coated aramid airbag is pressurized to 10 kPa within 5 seconds. The deployment form is constrained by the preset creases and guide cables to form a U-shaped hull structure, lifting the chassis 40 cm above the water surface. At the same time, the windows are automatically lowered by 5 cm to balance the internal and external pressures and prevent the vehicle body structure from deforming due to pressure difference. The air suspension of the vehicle is synchronously switched to the "floating mode", and the pressure is relieved to 200 kPa to buffer the impact force. The propulsion system is then activated: the front duct propeller drives the vehicle with a thrust of 800 N, and the rear ducted thruster assists in steering by deflecting ±30° through the servo motor. Combining the GPS and millimeter-wave radar data, it autonomously navigates to the nearest high ground, and the speed is stable at 5 knots (about 9.6 km / h).

[0043] Safety recovery stage: When the water level sensor detects that the accumulated water has receded below 20 cm and the flow rate <0.1 m / s for 10 minutes, the system starts the recovery program. The electric pressure relief valve of the airbag is opened. After the internal pressure drops below 1 kPa, the reel mechanism folds and compresses the airbag with Kevlar ropes with a tensile strength of 3000 N to 1 / 15 of its original volume and stores it in the special cabin of the chassis.

[0044] Embodiment 2 When the water level continues to rise to 40 cm, the vehicle chassis height can be barely passed by raising it through the air suspension. However, raising the chassis reduces the overall vehicle support. If the water level continues to rise and the airbag pops out, it is easy to cause the vehicle to jolt violently or roll over, posing a safety hazard.

[0045] Refer to Figure 5As shown, on the basis of the above embodiments, this embodiment is further improved. The airbag unit 21 is connected to the air suspension unit. The air suspension unit 40 includes a left front air suspension, a left rear air suspension, a right front air suspension, a right rear air suspension, and a vehicle air suspension. Among them, the vehicle is also provided with a six-axis IMU detection unit 50 to monitor the vehicle body attitude in real time, including a left front vehicle body height sensor, a left rear vehicle body height sensor, a right front vehicle body height sensor, a right rear vehicle body height sensor, a vehicle body roll angle sensor, and a vehicle body pitch angle sensor.

[0046] In this embodiment, when the water level for wading is 40 cm, the six-axis IMU detection unit 50 monitors the vehicle body attitude. If the roll angle < 3°, the pressure difference between the left and right air suspensions is adjusted to offset the lateral moment. When the pitch angle < 3°, it is controlled by the pressure difference between the front and rear air suspensions to limit the sinking speed of the vehicle head.

[0047] In this embodiment, when the water level for wading exceeds 50 cm, when the airbag unit 21 is deployed, the air suspension unit 40 actively releases pressure to 200 kPa to buffer the impact and prevent the vehicle from experiencing severe bumps.

[0048] Furthermore, the airbag unit 21 specifically includes a chassis floating airbag 21A, a left side balance airbag 21B1, and a right side balance airbag 21B2. When the roll angle > 3°, the pressure difference between the left and right air suspensions (ΔP = 100 kPa) and the difference in inflation volume (Δ10% - 15%) between the left and right side balance airbags cooperate to generate a reverse moment; when the pitch angle > 3°, the pressure difference between the front and rear air suspensions (ΔP = 100 kPa) and the inflation volume of the chassis floating airbag 21A are coordinated to adjust the inclination angle (±10°) of the rear double propeller propulsion 31 to generate a lifting moment.

[0049] After the airbag unit 21 is fully deployed, the air suspension unit 40 automatically resets to the standard height.

[0050] Preferably, referring to Figure 6 As shown, the pressure difference between them can also be controlled by the stroke of the left front air suspension, the left rear air suspension, the right front air suspension, and the right rear air suspension.

[0051] Referring again to Figure 6 As shown, the dynamic equation of the vehicle chassis is constructed as follows: In the formula, F i 、 F si and F di are the suspension force, air spring force, and damping force of the vehicle respectively. Z b is the vertical displacement of the Z-axis at the centroid position, I f and I rare the distances from the front and rear axles to the center of mass; B f and B r are the track widths of the front and rear axles respectively. and are the roll angle and pitch angle of the unsprung mass respectively.

[0052] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An automatic pop-up recyclable automotive emergency flood prevention airbag system, comprising a water level detection module (10), an airbag inflation module (20), and a vector propulsion module (30). It is characterized in that The water level detection module (10) includes a water level sensor (11) and an ultrasonic water level gauge (12) for detecting the wading depth. The water level detection module (10) has three levels of warnings. During the first-level warning, a yellow warning icon is displayed on the dashboard with synchronous voice prompts; during the second-level warning, the airbag inflation module (20) is prepared for pre-pop-up; during the third-level warning, the airbag inflation module (20) automatically pops up to lift the vehicle. The airbag inflation module (20) includes an airbag unit (21), an inflation unit (22), and a recovery unit (23), and the vector propulsion module (30) includes a dual propeller propulsion (31) and a control center (32).

2. The automatic pop-up recyclable vehicle emergency flood control airbag system according to claim 1, characterized in that, It further includes an air suspension unit (40) and a six-axis IMU detection unit (50). Among them, the air suspension unit (40) includes a left front air suspension, a left rear air suspension, a right front air suspension, and a right rear air suspension, and the six-axis IMU detection unit (50) monitors the vehicle body attitude in real time. During the second-level warning, the six-axis IMU detection unit (50) monitors the vehicle body attitude. When the roll angle is less than the threshold, the differential pressure between the left and right air suspensions is adjusted to offset the lateral moment; when the pitch angle is less than the threshold, the differential pressure of the front and rear air suspensions is controlled to limit the sinking speed of the vehicle head.

3. The automatic pop-up recyclable vehicle emergency flood control airbag system according to claim 2, wherein, During the third-level warning, when the airbag unit (21) unfolds, the air suspension unit (40) actively releases pressure to 200 kPa to buffer the impact.

4. An automatic pop-up recyclable vehicle emergency flood control airbag system according to claim 2, characterized in that, The differential pressure of the left front air suspension, the left rear air suspension, the right front air suspension, and the right rear air suspension controls the stroke. Among them, the dynamic equation of the vehicle chassis is constructed as follows: Wherein, F i , F si and F di are the suspension force, air spring force and damping force of the vehicle respectively, Z b is the vertical displacement in one direction at the center of mass position, I f and I r are the distances from the front and rear axles to the center of mass respectively; B f and B r are the track widths of the front and rear axles respectively, and are the roll angle and pitch angle of the unsprung mass respectively.

5. An automatic pop-up recyclable vehicle emergency flood control airbag system according to claim 2, characterized in that, The airbag unit (21) specifically includes a chassis floating airbag (21A), a left-side balance airbag (21B1), and a right-side balance airbag (21B2). When the roll angle is greater than the threshold, the differential pressure between the left and right air suspensions and the difference in the inflation amount between the left and right side balance airbags jointly generate a reverse moment; when the pitch angle is greater than the threshold, the differential pressure of the front and rear air suspensions, and the inflation amount of the chassis floating airbag (21A) cooperate to adjust the inclination angle of the rear dual propeller propulsion (31) to generate a lifting moment.

6. The automatic pop-up recyclable vehicle emergency flood control airbag system according to claim 1, characterized in that, The chassis floating airbag (21A) is U-shaped and surrounds the vehicle head. After inflation, it forms a hull structure. The bilateral balance airbags (21B) are installed on both sides of the vehicle, and a reflective strip and a distress signal alarm are integrated on the bilateral balance airbags (21B).

7. An automatic pop-up recyclable vehicle emergency flood control airbag system according to claim 1, characterized in that, The inflation unit (22) includes an electric high-pressure air pump, a high-pressure gas storage tank, a pressure distributor, a one-way valve, and a pressure detection controller that monitors and replenishes the high-pressure gas storage tank in real time.

8. An automatic pop-up recyclable vehicle emergency flood control airbag system according to claim 6, characterized in that, Both the chassis floating airbag (21A) and the bilateral balance airbags (21B) are made of double-layer TPU-coated aramid fiber material.

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