An intelligent device that turns a flat-head vehicle into a long-head vehicle to protect pedestrians

Abstract

In order to avoid the phenomenon of flat-head trucks directly knocking down and crushing pedestrians and improve the utilization rate of blind spots in the driving field of vision, the present invention designs an intelligent device that turns flat-head trucks into long-head trucks to protect pedestrians. The device includes a collision sensor, a hazard alarm, a collision generator and a vehicle control center. The collision sensor is placed at the front of the vehicle to receive collision signals; the hazard alarm is placed on the left side of the cab to remind the driver to take braking measures; the collision generator is placed on the chassis and 0.1m in front of the front of the vehicle; the vehicle control center is placed on the roof of the flat-head truck. The technical solution of the present invention is characterized in that: when an accident is inevitable, the device is ejected in advance to knock pedestrians down on the protective net and protective layer, the supporting protective plate brings the pedestrians to the ground or the pedestrians are knocked down on both sides of the front of the vehicle, and the outer side plate of the telescopic box is hinged to the ground for the pedestrians' feet to place, avoiding the damage caused by the direct collision between the flat-head truck and the pedestrian, and even the secondary damage caused by further crushing.

Description

Technical Field

[0001] The present invention relates to the field of intelligent vehicles, and more particularly to an intelligent device for transforming a flat-head vehicle into a long-head vehicle to protect pedestrians. Background Art

[0002] The front of existing large flat-head vehicles (buses, dump trucks, trucks, and passenger vehicles) all adopt a flat-head model. However, in the event of a collision between a vehicle and a pedestrian, there is no good buffer area for pedestrians, so pedestrians are directly knocked away by the front of the vehicle, causing serious injuries to the vehicle and the ground, and even further crushing of pedestrians after being knocked away.

[0003] On existing large flat-head trucks (buses, dump trucks, trucks, passenger vehicles), there is still a certain blind spot when standing in the cab. The driver may not pay attention to the pedestrians in front, resulting in traffic accidents. If the blind spot can be fully utilized to fill a protective device, the utilization rate of the blind spot can be improved and pedestrians can be protected.

[0004] Existing large flat-head vehicles (buses, dump trucks, trucks, passenger vehicles) are equipped with adaptive cruise control systems that can automatically control the vehicle speed. Based on this idea, a vehicle control center is designed to define the control method according to the distance between pedestrians and the front of the vehicle and the area of ​​the device in front of the front of the vehicle where the pedestrians are located. Combining it with this device can achieve the purpose of automatically controlling the movement of the vehicle, so as to reduce the greater harm caused to pedestrians by the driver's inability to independently judge which control method to use or failing to take braking control in time during an accident.

[0005] Existing large flat-head vehicles (buses, dump trucks, trucks, passenger vehicles) are not equipped with automatic emergency braking systems (AEB). AEB is an active automobile safety technology, consisting of a distance measurement module, a data analysis module, and an actuator module. The AEB system uses radar to measure the distance to the vehicle in front or an obstacle, and then compares the distance measured by the data analysis module with the safe distance and the alarm distance. When the distance is less than the alarm distance, an alarm prompt will be issued. When the distance is less than the safe distance, even if the driver does not have time to step on the brake pedal, the AEB system will be activated to automatically brake the car. However, existing studies have shown that even with AEB, accidents cannot be completely avoided. Based on the idea of ​​the new technology of pedestrian automatic emergency braking system PAEB proposed in 2019 that controls vehicle movement to protect people from collision injuries, the AEB system will be activated to automatically brake the car. PAEB technology is an appropriate extension of AEB technology, that is, it further controls the movement of the vehicle within 0.45s after the vehicle contacts the pedestrian, and controls the movement of the vehicle so that the vehicle and the pedestrian move together for a certain distance to reduce the damage caused by the collision. Existing research has not yet converted this idea into a specific device, especially for flat-head vehicles, which cannot provide an area for them to move together with pedestrians.

[0006] Existing studies have shown that the human-vehicle interaction time is negatively correlated with the damage caused by a collision between a person and a vehicle. If the human-vehicle interaction time can be extended, the damage caused by a collision between a person and a vehicle can be greatly reduced. When a large flat-head vehicle (bus, dump truck, truck, passenger vehicle) hits a pedestrian head-on, the interaction time is extremely short. Therefore, a device is urgently needed as an intermediary to increase the human-vehicle interaction time. Summary of the invention

[0007] In order to prevent a flat-head truck from directly knocking down pedestrians or even further crushing pedestrians and to improve the utilization rate of blind spots in the driver's field of vision, the present invention designs an intelligent device that turns a flat-head truck into a long-head truck to protect pedestrians. The device includes a collision sensor, a hazard alarm, a collision generator and a vehicle control center. The collision sensor is placed on the front of the flat-head truck to receive signals of an impending collision; the hazard alarm is placed on the left side of the cab to remind the driver to take braking measures; the collision generator is compressed and placed 0.1m in front of the chassis and front of the flat-head truck to prevent the flat-head truck from directly knocking down or crushing pedestrians and does not block the heat dissipation of the front of the truck; the vehicle control center is placed on the roof of the flat-head truck.

[0008] If the collision sensor detects that the pedestrian is at a dangerous distance, the hazard alarm starts to sound, and the driver must take braking measures immediately; if the driver takes braking measures immediately, the collision can be avoided in time. If the driver does not take braking measures, when the pedestrian is detected to be at half the sum of the dangerous distance and the inevitable distance of collision, the vehicle control center immediately takes over the control and brakes the vehicle according to the distance between the pedestrian and the vehicle; if the pedestrian is detected to be at an inevitable distance for frontal collision, the accident is inevitable at this time. When the vehicle control center completely brakes the vehicle, the collision generator starts to work. First, the electric telescopic slide rail (2) slides forward. At the same time, the buckle (5) in the card slot with the sensor installed in the first support plate (13) pops out. At the same time, the telescopic box (3) and the front end of the protective layer (10) fixed on the electric telescopic slide rail (2) are driven to extend forward. The protective net (7) originally connected to the front end of the protective layer (10) and the upper end of the second support plate (14) in a relaxed state is tensioned. At the same time, the compressible high-elasticity arc-shaped protective layer (10) is extended from the chassis and the support protection plate (9). The gap between the two is drawn out, and the supporting protection plate (9) slides forward driven by the protective layer (10) and the electric telescopic slide rail (2). As mentioned above, the device has changed from a compressed state to an extended state. The vehicle control steps are as follows:

[0009] S101: If it is detected that the accident is unavoidable, the vehicle control center fully brakes the vehicle, and when the pedestrian's legs collide with the front end of the protective layer (10), the vehicle control center continues to fully brake the vehicle until the pedestrian's head falls on the protective net (7) at time t1;

[0010] S102: If the pedestrian's chest is detected to be within one-fourth of the vehicle width w on the left and right sides of the longitudinal centerline, the vehicle control center controls the current vehicle speed so that the device in front of the flat-head vehicle and the pedestrian holding the protective net on the device move forward 10m together; if the pedestrian's legs are detected to be within one-fourth of the vehicle width w on the left and right sides of the longitudinal centerline, the vehicle control center immediately brakes the vehicle completely to a stop; if the pedestrian's legs are not detected to be within one-fourth of the vehicle width w on the left and right sides of the longitudinal centerline, the vehicle control center brakes the vehicle completely to a stop, and the pedestrian will hold the protective net and stop with the vehicle;

[0011] S103: If it is detected that the chest of the pedestrian is within one-quarter of the vehicle width w of the left and right side lines of the vehicle front, the vehicle control center controls the current vehicle speed so that the device in front of the flat-head vehicle and the pedestrian holding the protective net (7) on the device move forward 10m to step S102;

[0012] If, during step S102, it is detected that the chest of the pedestrian is within one-fourth of the vehicle width w on the left and right sides of the longitudinal centerline, the vehicle control center automatically controls the current vehicle speed so that the device in front of the flat-head vehicle and the pedestrian holding the protective net (7) on the device move forward together by 10 meters; if it is detected that the legs of the pedestrian are within one-fourth of the vehicle width w on the left and right sides of the longitudinal centerline, at this time, the intelligent net-untying hook (6) is released, the protective net (7) falls on the protective layer (10), and the pedestrian falls on the protective layer (10). Due to the gravity of the pedestrian, the rollers at both ends of the first damping hinge (11) slowly roll in the telescopic slide rail (8), and the vehicle During the process of the control center completely braking the vehicle to a standstill, the support protection plate (9) will slide to the ground, and will slide forward for a distance due to inertia. The bottom surface of the support protection plate (9) will rub against the ground, and the impact caused by the vehicle speed will be greatly reduced. After sliding for a distance, the vehicle will stop, or the pedestrian will be thrown out on the plane during sliding. Compared with the direct collision of the front of the flat-head vehicle, the collision damage between the pedestrian and the vehicle and the collision damage between the pedestrian and the ground is effectively reduced. If the pedestrian's legs are not detected to be at one-quarter of the vehicle width w on the left and right of the longitudinal center line, the vehicle control center will continue to completely brake the vehicle to a standstill, and the pedestrian will grab the protective net (7) and stop with the vehicle.

[0013] If during step S103, it is detected that the chest of the pedestrian is within one-fourth of the vehicle width w of the left and right side lines of the front of the vehicle, the vehicle control center controls the current vehicle speed so that the device in front of the flat-head vehicle and the pedestrian holding the protective net (7) on the device move forward 10m to step S102; if the vehicle control center completely brakes the vehicle for 10m, it is detected that the pedestrian has not achieved step S102, that is, the pedestrian has not moved autonomously to the area specified in step S102, at this time, the vehicle control center completely brakes the vehicle to a standstill, and at the same time as the vehicle control center completely brakes, the intelligent hook (15) is released, and the retractable double-layer material plate on the outside of the retractable box (3) is rotated to the ground through the retractable rotating hinge (16) for the pedestrian's legs to rest, and the vehicle control center continues to completely brake the vehicle to a standstill, and the pedestrian steps on the double-layer material plate and holds the protective net (7) with his hands to stop with the vehicle.

[0014] Furthermore, the vehicle control center is placed on the roof of the cabover to obtain a good signal reception range and to be able to control the vehicle in a timely manner.

[0015] Furthermore, t1 in step S101 refers to the moment when the pedestrian's head collides with the protective net for the first time, and the vehicle is fully braked in order to reduce the speed and the impact caused by the collision.

[0016] Furthermore, in step S102, when the vehicle control center completely brakes the vehicle to a standstill, the supporting protection plate will slide to the ground and will slide forward for a certain distance due to inertia. During this process, the supporting protection plate, the protective layer, and the pedestrians on the protective layer will not be hit by the car after they are separated from the front device of the flat-head car. Immediately after the separation, even if the separated part has the same acceleration as the car, the friction between the supporting protection plate and the ground is smaller than the friction between the tire of the flat-head car and the ground, and the flat-head car will not catch up with the separated part.

[0017] Furthermore, the collision sensor adopts a conventional laser sensor to achieve non-contact long-distance measurement of the distance between the pedestrian and the front of the vehicle. The collision sensor is placed at the license plate in front of the front of the flat-head truck. Since the laser sensor is not large, it will not block the license plate number and will not be blocked by the device. The hazard alarm adopts a conventional induction alarm. When the collision sensor senses that the pedestrian is at a dangerous distance, it transmits a signal to the hazard alarm, and the hazard alarm starts to alarm.

[0018] Furthermore, the device is located 0.1m in front of the front of the vehicle, that is, the back of the first supporting plate is 0.1m away from the front of the flat-head vehicle. On the one hand, it does not block the heat dissipation of the front of the vehicle, and on the other hand, it can minimize the distance between the front end of the device in a compressed state and the front of the vehicle, so that the device does not protrude too much and maintains the original flat-head shape. On the other hand, it can prevent the license plate and the lights from being completely blocked by the device. At the same time, it is easy to disassemble the device for later maintenance.

[0019] Furthermore, when the pedestrian is at a distance that is half of the sum of the dangerous distance and the inevitable collision distance, the vehicle is braked at the pedestrian-vehicle distance, and the vehicle control center takes over the vehicle control and brakes the vehicle with the vehicle braking degree k; if the pedestrian avoids, the vehicle control center is shut down; if the pedestrian does not avoid, the vehicle enters the inevitable pedestrian-vehicle collision stage, and the vehicle speed is reduced in advance, providing a comfortable buffer time area for the next stage of full braking of the vehicle, which will reduce the safety problems caused by immediate braking due to too high speed and improve the comfort of the occupants.

[0020] Furthermore, based on the average height of pedestrians, the protective net in the extended state is set to be 2m long and the same width as the front of the vehicle, and the thickness of the device after compression is set to be 0.2m, that is, the distance from the front end of the protective layer of the device to the front of the vehicle is 0.3m. The height of the second support plate is to the bottom edge of the front windshield, so as to fully utilize the height of the front probe cover without blocking the windshield, providing the driver with a good field of vision.

[0021] Furthermore, the left and right headlights of a flat-head vehicle almost each occupy a quarter of the width w of the entire front of the vehicle. When designing the telescopic box, the size of the opening needs to take into account the situation of not blocking the headlights, that is, the lateral width of a telescopic box needs to reach at least a quarter of the width w of the vehicle, and the range of a quarter of the width w on the left and right of the longitudinal center line is a compressible protective layer; if it is detected that the chest and legs of the pedestrian are both within a quarter of the width w on the left and right of the longitudinal center line, the intelligent net-untying hook is released, and while the protective net falls downward, the pedestrian will fall well on the protective layer under the action of his own center of gravity, and will not fall on the position of the telescopic box. On the one hand, when the pedestrian falls on the protective net, the collision with the telescopic box will cause serious collision damage. On the other hand, the telescopic box has no grip to provide, which brings hidden dangers to the pedestrian. In serious cases, the pedestrian may fly out from both sides. On the telescopic box of a quarter of the width w of the left and right side lines of the front of the vehicle, under the action of a layer of protective net, there will be no serious collision with the telescopic box, thereby reducing the collision damage caused by the collision between the pedestrian and the telescopic box. If it is monitored that the chest of the pedestrian is within one-quarter of the vehicle width w of the left and right side lines of the front of the vehicle, one way is to control the current vehicle speed through the vehicle control center to make the device in front of the flat-head vehicle and the pedestrian holding the protective net on the device move forward 10m together, in order to provide the pedestrian with time to move toward the range of one-quarter of the vehicle width w on each side of the longitudinal center line; if the pedestrian does not move toward the range of one-quarter of the vehicle width w on each side of the longitudinal center line during this period of time, the vehicle control center will switch from controlling the current vehicle speed to completely braking the vehicle to a standstill. At the same time as the vehicle control center completely brakes the vehicle, the lower ends of the outer double-layer material plates of the two telescopic boxes are rotated to the ground through the rotation of the telescopic rotating hinge, so that the legs of the pedestrian can be placed. This avoids the situation where the pedestrian is physically exhausted due to holding the protective net for a long time. After the pedestrian's feet are placed on the double-layer material plate, the pedestrian will save a lot of physical strength when holding the protective net at this time, and the feeling of fatigue will be reduced.

[0022] Furthermore, when the pedestrian is in the S102 state, the hook on the intelligent net-untying hook is released, the protective net falls off, and the pedestrian falls on the concave protective layer. The gravity of the pedestrian cooperates with the slow rolling of the rollers on both sides of the first damping hinge in the telescopic slide rail, and the supporting protective plate and the protective layer connected together by a strong adhesive and the pedestrian holding the upper end hole of the protective layer begin to slide along the track of the telescopic slide rail together. When the vehicle control center is set to completely brake the vehicle to a standstill, the supporting protective plate has just completely slid from the inclined plane to the ground, and the supporting protective plate touches the ground and rubs against the ground to generate resistance, which has a certain deceleration effect, not only preventing the direct collision between the front of the vehicle and the pedestrian, greatly reducing the degree of injury to the pedestrian, but also preventing the pedestrian from being further crushed by the wheels after being hit.

[0023] Furthermore, the collision generator comprises: a dust cover (1), an electric telescopic slide rail (2), a telescopic box (3), a rotating hinge (4), a buckle (5), an intelligent net-releasing hook (6), a protective net (7), a telescopic slide rail (8), a supporting protection plate (9), a protective layer (10), a first damping hinge (11), a second damping hinge (12), a first supporting plate (13), a second supporting plate (14), an intelligent hook (15) and a retractable rotating hinge (16); the dust cover (1) is fixed to the chassis of the flat head car; the electric telescopic slide rail (2) is fixed under the chassis inside the dust cover (1); the telescopic box (3) is fixed to the outermost protruding upper surface of the electric telescopic slide rail (2) and is distributed on both sides of the front of the car; the buckle (5) is connected to the telescopic box (3) through the rotating hinge (4) and can be buckled into the intelligent card slot of the first supporting plate (13); the intelligent net-releasing hook (6) is fixed to the second supporting plate (13); The upper end of the support plate (14), one end of the protective net (7) is fixed to the front end of the protective layer (10) and the front end of the telescopic box (3), and the other end is clamped on the hook of the intelligent net-releasing hook (6), the telescopic slide rail (8) is at the two side rails of the electric telescopic slide rail (2), the supporting protection plate (9) is connected to the two electric telescopic slide rails (2) through the first damping hinge (11), and at the same time, the rollers at both ends of the first damping hinge (11) connected in the supporting protection plate (9) need to be embedded in the telescopic slide rail (8), the protective layer (10) is fixed to the supporting protection plate (9) by a certain strong adhesive, and the first supporting plate (13) is fixed to the electric telescopic slide rail (2) The outermost protruding upper surface is fixed to the telescopic boxes (3) on the left and right sides, the second supporting plate (14) is connected to the first supporting plate (13) through the second damping hinge (12), the intelligent hook (15) is fixed to the upper ends of the double-layer material plates on the two outer sides of the telescopic box (3), the angles between the telescopic box (3) and the protective layer (10) and the horizontal plane are both θ, 135°<θ<150°, the angle between the supporting protective plate (9) and the horizontal plane is α, 160°<α<180°, and the angle between the second supporting plate (14) and the horizontal plane is β, 100°<β<120°;

[0024] Furthermore, the purpose of limiting the angle θ between the telescopic box and the protective layer and the horizontal plane is, on the one hand, to provide a longer length for catching pedestrians compared to a horizontal device extending the same horizontal length, thereby greatly shortening the horizontal design length, on the one hand, to prevent a person's head from directly colliding with the front of a flat-head truck or the windshield, and on the other hand, to play a certain buffering role in catching pedestrians.

[0025] Furthermore, the purpose of limiting the angle α between the support protection plate and the horizontal plane is to prevent the support protection plate from tilting in the opposite direction of the vehicle's movement under the action of gravity, causing a person to fall in the opposite direction of the vehicle's movement, increasing the chance of injury.

[0026] Furthermore, the purpose of limiting the angle β between the second support plate and the horizontal plane is that when the vehicle is braked, the second support plate can be placed on the windshield under the rotation of the second damping hinge. After limiting θ, it can further effectively prevent the pedestrian's head from directly colliding with the front of the flat-head truck or the windshield.

[0027] Furthermore, the purpose of selecting the first damping hinge for the supporting protection plate and the telescopic slide rail is, on the one hand, to slow down the rapid rolling of the rollers at both ends of the first damping hinge along the electric telescopic slide rail, so that the supporting protection plate immediately tilts and falls to the ground when it is affected by the gravity of the pedestrian, thereby preventing the pedestrian from being subjected to a huge impact, and providing a certain time gap for the driver to take corresponding vehicle braking measures according to the situation at that time;

[0028] Furthermore, the purpose of setting up the protective net is to play a certain role in absorbing collision energy on the one hand, and to provide pedestrians with something to hold on to on the other hand.

[0029] Furthermore, the telescopic box can greatly reduce the longitudinal size of the device and is arranged on the left and right sides of the front of the vehicle, which greatly improves the efficiency of the device popping out. A hole is opened on the telescopic box to avoid blocking the headlights when the device is in a compressed state. The lower ends of the retractable double-layer material plates on both sides of the telescopic box are connected to the bottom telescopic plate of the telescopic box through retractable rotating hinges, and the upper ends of the retractable double-layer material plates are clamped on the upper telescopic plate through smart hooks.

[0030] Furthermore, the thickness of the supporting protective plate should be smaller than that of the electric telescopic slide rail so that a compressible protective layer can be inserted into the gap between them. The supporting protective plate will not tilt when not affected by the gravity of the pedestrian. The rollers at both ends of the first damping hinge in the supporting protective plate and the track of the telescopic slide rail adopt an appropriate interference fit. On the one hand, driven by the front end of the protective layer and the electric telescopic slide rail, the rollers at both ends of the first damping hinge will not roll freely. On the other hand, when the pedestrian falls on the protective layer, it can roll slowly instead of rolling quickly along the telescopic slide rail, thereby avoiding the risk of the pedestrian being subjected to a huge impact.

[0031] Furthermore, the protective layer adopts an arc-shaped structure of high-resilient material, which is more conducive to absorbing the impact energy of pedestrian collision than a flat structure. The hole at the front end is to avoid blocking the license plate, the hole in the middle is to avoid blocking the car logo, and the hole at the upper end is for pedestrians to grasp, forming a secondary hand-grabbing protection after the protective net. At the same time, a large number of holes can save a lot of compression space, which can be better stuffed into the gap between the supporting protection plate and the vehicle chassis.

[0032] Furthermore, a circular hole is opened on the first supporting plate to avoid blocking the vehicle logo, and two holes are opened on each side to avoid blocking the vehicle lights. At the same time, card slots need to be opened on the left and right sides of the back of the first supporting plate to install sensors, so that the buckle can pop out at the first time while the electric telescopic slide rail is running.

[0033] Furthermore, the purpose of providing the telescopic slide rail is that when a pedestrian falls on the protective layer, the supporting protective plate tilts due to the effect of gravity, and when the rollers on the left and right sides of the first damping hinge roll along the telescopic slide rail, the supporting protective plate slides down under the telescopic slide rail, and the pedestrian can grab the hole at the upper end of the protective layer. In the process of the supporting protective plate being driven and the vehicle control center completely braking the vehicle to a standstill, the supporting protective plate, the protective layer and the pedestrian grabbing the hole at the upper end of the protective layer can slide to the ground. Since the height of the supporting protective plate and the protective layer is higher than the height of the bottom of the vehicle from the ground, the pedestrian will not fall under the vehicle, thereby preventing the pedestrian from being crushed by the flat-head truck.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] This device combines with the vehicle control center to perform automatic braking control on the vehicle. If the collision sensor detects that the pedestrian is at a dangerous distance, the danger alarm starts to alarm and the driver must take braking measures immediately. If the driver takes braking measures immediately, the collision can be avoided in time. If the driver does not take braking measures, when it detects that the pedestrian is at a dangerous distance and half of the sum of the unavoidable distance of collision, the vehicle control center immediately takes over the control and brakes the vehicle according to the distance between the person and the vehicle. At the same time, if it is detected that the pedestrian is at an unavoidable distance for the head-on collision, the accident is inevitable at this time, and the collision generator starts working. The first situation is that the pedestrian is knocked down on the protective net and the protective layer in advance by the front end of the protective layer. The grid gaps of the protective net and the hole gaps of the protective layer provide pedestrians with handholds. The pedestrian falls on the protective layer. Due to the action of his own gravity, the rollers at both ends of the first damping hinge slowly roll in the telescopic slide rail. In the second case, the pedestrian is knocked down on the protective net by the front ends of both sides of the protective layer in advance. The pedestrian can be protected by grabbing the protective net with his hands and stepping on the double-layer material plate, or the vehicle control center can control the current speed to make the device on the flat head car move forward with the pedestrian for a distance, so that the pedestrian can climb to the range of one quarter of the vehicle width w on both sides of the longitudinal center line, and then protect the pedestrian according to the first case. This device effectively avoids the serious human-vehicle collision damage and human-ground collision damage caused by pedestrians being directly hit by flat-head trucks, and even the risk of further crushing pedestrians. At the same time, it fully improves the utilization rate of the flat-head truck's blind spot. The blind spot is used to arrange this device, which effectively protects the safety of pedestrians. At the same time, this device combines the latest PAEB technical ideas and the idea that the longer the interaction time between people and vehicles, the lower the damage to people and the ground. The extended length of the device and the size of the inclined angle can be related to the inclination angle of the car's engine hood, which can better provide a new direction for studying how to reduce human-ground damage protection by controlling braking. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the longitudinal center line of the vehicle head and a quarter of the vehicle width w of the device;

[0037] Figure 2 It is a structural schematic diagram of the device in a compressed state without a protective net installed;

[0038] Figure 3 This is a schematic diagram of the structure of the device when it is in a compressed state and equipped with a protective net;

[0039] Figure 4 It is a structural schematic diagram of the protective net when the device is in an extended state and is tensioned;

[0040] Figure 5 It is a structural schematic diagram of the telescopic box being connected with the front end of the protective layer and the electric telescopic slide rail when being compressed;

[0041] Figure 6 It is a schematic diagram of the connection structure between the electric telescopic slide rail and the telescopic box when the device is in an extended state;

[0042] Figure 7 It is an axial bottom view of the device in an extended state;

[0043] Figure 8 It is a schematic diagram of the structure of the electric telescopic slide rail and the telescopic slide rail when the device is in an extended state;

[0044] Fig. 9 A schematic diagram of the structure of the roller supporting the protection plate, the first damping hinge and the protruding portion;

[0045] Fig.10 It is a structural schematic diagram of the telescopic box when the device is extended;

[0046] Fig.11 It is a structural diagram of the smart hook;

[0047] Fig.12 It is a schematic diagram of the retractable rotary hinge structure;

[0048] Fig.13 It is a schematic diagram of the structure of the outer side of the telescopic box and the telescopic rotating hinge;

[0049] Fig.14 It is a structural schematic diagram of the two outer retractable plates of the telescopic box rotating to the ground through the retractable rotating hinges;

[0050] Fig.15 It is a structural schematic diagram of the telescopic box in a compressed state;

[0051] Figure 16-18 It is a structural schematic diagram of the telescopic part;

[0052] Fig.19 It is a structural schematic diagram of the specific position of the supporting protection plate;

[0053] Fig. 20 It is a schematic diagram of the three-dimensional structure of the device in a compressed state when the car and the pedestrian are not at a dangerous distance;

[0054] Fig.21 It is a three-dimensional structural schematic diagram of the device in the extended state when the car and the pedestrian are at a dangerous distance;

[0055] Figure 22-27 This is the working flow diagram of the collision generator;

[0056] Fig.28Schematic diagram for describing each distance;

[0057] Fig.29 is a structural schematic diagram of the device in an extended state;

[0058] Figure 30-31 Flowchart of S101-S103 for the vehicle control center and pedestrian protection;

[0059] Among them, the corresponding figure marks are: 2-electric telescopic slide rail, 3-telescopic box, 4-rotating hinge, 5-buckle, 6-intelligent net-releasing hook, 7-protective net, 8-telescopic slide rail, 9-support protection plate, 10-protective layer, 11-first damping hinge, 12-second damping hinge, 13-first supporting plate, 14-second supporting plate, 15-intelligent hook, 16-retractable rotating hinge.

[0060] in, Figure 1 The upper and lower lines are the side lines of the front of the vehicle, and the dotted line in the middle is the longitudinal center line of the front of the vehicle.

[0061] in, Fig.15 The telescopic box in the compressed state shown is only for showing the state of the buckle and the telescopic box when compressed, and does not represent the specific length of the telescopic box and the buckle.

[0062] in, Fig.28 Serial number 29 represents the danger distance, serial number 30 represents half of the sum of the danger distance and the collision inevitable distance, and serial number 31 represents the collision inevitable distance.

[0063] in, Fig.30 When the pedestrian fails to avoid the vehicle and the collision is unavoidable, the vehicle control center completely brakes the vehicle. At the same time, the device in the compressed state completes its extension before colliding with the pedestrian. DETAILED DESCRIPTION

[0064] The accompanying drawings alone cannot enable those skilled in the art to fully understand the solution of the present invention. The following further describes the technical solution of the present invention in combination with the embodiments according to the exemplary embodiments of the accompanying drawings. The technical solution in the embodiments of the present invention is described in detail and completely, and the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0065] Embodiment 1

[0066] For a bus equipped with the inventive device "intelligent device for converting a flat-head vehicle into a long-head vehicle to protect pedestrians", the device protects pedestrians in the following ways:

[0067] Step S97, when the collision sensor detects that the pedestrian is at a dangerous distance, it transmits a signal to the danger alarm;

[0068] Step S99, the hazard alarm reminds the driver to take braking measures. If the driver takes braking measures immediately, the collision can be avoided in time. If the driver does not take braking measures, when the pedestrian is detected to be at half the sum of the danger distance and the inevitable collision distance, the vehicle control center immediately takes over the control and brakes the vehicle according to the distance between the pedestrian and the vehicle;

[0069] Step S101, if it is monitored that the accident is inevitable, that is, when the person and the vehicle are at an inevitable collision distance, the vehicle control center completely brakes the vehicle, and when the pedestrian's legs collide with the front end of the protective layer (10), the vehicle control center continues to completely brake the vehicle until the pedestrian's head falls on the protective net (7) at time t1. At the same time as the vehicle control center completely brakes the vehicle, the collision generator starts to work, the electric telescopic slide rail (2) slides forward, and at the same time, the buckle (5) in the card slot with a sensor in the first support plate (13) pops out. At the same time, the telescopic box (3) and the front end of the protective layer (10) fixed to the electric telescopic slide rail (2) extend forward, and the protective net (7) originally connected to the front end of the protective layer (10) and the upper end of the second support plate (14) in a relaxed state is tensioned. At the same time, the supporting protective plate (9) is clamped on the telescopic slide rail (8) through the rollers at both ends of the first damping hinge (11) and is driven by the electric telescopic slide rail (2) to move forward, and the compressible high-elasticity arc-shaped protective layer (10) It is pulled out from the gap between the chassis and the supporting protection plate (9);

[0070] Step S102, if it is detected that the chest of the pedestrian is within one-fourth of the vehicle width w on the left and right sides of the longitudinal centerline, the vehicle control center controls the current vehicle speed so that the device in front of the flat-head vehicle and the pedestrian holding the protective net on the device move forward 10 meters together; if it is detected that the legs of the pedestrian are within one-fourth of the vehicle width w on the left and right sides of the longitudinal centerline, the vehicle control center completely brakes the vehicle. At this time, the intelligent net-releasing hook (6) is released, the protective net (7) falls, and the pedestrian falls on the protective layer (10). Due to the gravity of the pedestrian, the first damping hinge ( 11) The rollers at both ends rotate slowly in the telescopic slide rail (8), and the vehicle control center completely brakes the vehicle to a standstill. The support protection plate (9) will slide to the ground, and will slide forward for a distance due to inertia. The bottom surface of the support protection plate (9) rubs against the ground, and the impact caused by the vehicle speed will be greatly reduced. After sliding for a distance, the vehicle will stop or pedestrians will be thrown out on the plane. At this time, the sliding speed on the plane is very small. Compared with the direct collision of the bus head, the collision damage between people and vehicles and people and the ground is greatly reduced;

[0071] Step S103, if it is detected that the chest of the pedestrian is within one-fourth of the vehicle width w of the left and right side lines of the front of the vehicle, the vehicle control center controls the current vehicle speed so that the device in front of the flat-head vehicle and the pedestrian holding the protective net (7) on the device move forward 10m to step S102; if the vehicle control center completely brakes the vehicle for 10m, it is detected that the pedestrian has not completed step S102, that is, the pedestrian has not moved autonomously to the area specified in step S102. At this time, the vehicle control center completely brakes the vehicle to a standstill. At the same time as the vehicle control center completely brakes, the smart hook (15) is released, and the retractable double-layer material plate on the outside of the telescopic box (3) is rotated to the ground through the retractable rotating hinge (16) for the pedestrian's legs to rest. The vehicle control center continues to completely brake the vehicle to a standstill, and the pedestrian will step on the double-layer material plate and hold the protective net (7) with his hands to stop with the vehicle. The process is as follows Figure 22-27 As shown, Fig. 22 :The pedestrian is at a dangerous distance from the front of the vehicle, and the collision generator is in a compressed state. Fig.23 : When the pedestrian is at half of the sum of the unavoidable distances of the collision, the compressed device stretches, Fig.24 : The pedestrian was knocked down by the front end of the protective layer and fell on the protective net. The pedestrian grabbed the protective net. Fig.25 : When the chest and legs of the pedestrian in step S102 are detected to be within one-quarter of the vehicle width w on the left and right sides of the longitudinal center line of the vehicle head, the intelligent net-untying hook is released, and the protective net falls onto the protective layer together with the pedestrian under the action of the pedestrian's gravity. The pores at the upper end of the protective layer are provided for the pedestrian to grab for a second time. Fig.26 : Under the action of pedestrian gravity and the first damping hinge, the supporting protection plate, pedestrian and protective layer slowly tilt along the telescopic slide rail, and the rollers at both ends of the first damping hinge slide along the telescopic slide rails on both sides of the electric telescopic slide rail. Fig. 27 : When the vehicle control center completely brakes the vehicle to a stop, the supporting protection plate, pedestrians and the protection layer slide along the ground for a distance and come to a stop on the ground. The pedestrian lies on the protection layer at this time to prevent the pedestrian from being directly hit by the front of the bus and causing serious damage to the pedestrian-vehicle collision and the pedestrian-ground collision, or even further crushing the pedestrian.

[0072] The collision point between the bus and the pedestrian is mainly the front part of the bus. The collision sensor can be installed at the license plate in front of the bus head. The electric telescopic slide rail (2) in the collision generator is installed under the chassis in the dust cover (1). The first support plate (13) is fixed at 0.1m away from the front of the bus. The bottom surface of the first support plate (13) is fixed to the outermost protruding upper surface of the electric telescopic slide rail (2). The back of the telescopic box (3) is close to the front of the first support plate (13). At the same time, the bottom plate of the telescopic box (3) is fixed to the outermost protruding upper surface of the electric telescopic slide rail (2). When the device is compressed, most of the support protection plate (9) is located under the chassis in the dust cover (1), and the remaining part is exposed at the front of the bus. The protective layer (10) can be compressed and inserted into the gap between the support protection plate (9) and the chassis.

[0073] After the above steps, the device not only makes full use of the blind spot area of ​​flat-head vehicles such as buses, but also solves the problem in the prior art that flat-head vehicles such as buses have no buffer area on the front of the vehicle and directly hit the flying person, causing serious injury to the pedestrian or even secondary injury caused by vehicle crushing. It also combines the latest PAEB technical ideas and the idea that the longer the interaction time between people and vehicles, the lower the damage to people and the ground. Among them, the extended length of the device is related to the length of the car's engine hood, and the size of the inclination angle of the ramp is related to the inclination angle of the car's engine hood. It can better provide a new direction for studying how to reduce protection against damage to people and the ground by controlling braking.

Claims

1. An intelligent device that turns a flat-head vehicle into a long-head vehicle to protect pedestrians. It is characterized in that It includes a collision sensor, a danger alarm, a collision generator and a vehicle control center. The collision sensor is placed on the front of the flat-head truck to receive collision signals; the danger alarm is placed on the left side of the cab to remind the driver to take braking measures; the collision generator is placed 0.1m in front of the front of the flat-head truck to prevent the flat-head truck from directly hitting or crushing pedestrians and does not block the heat dissipation of the front of the truck; the vehicle control center is placed on the roof of the flat-head truck; The collision generator comprises: a dust cover (1), an electric telescopic slide rail (2), a telescopic box (3), a rotary hinge (4), a buckle (5), an intelligent net-releasing hook (6), a protective net (7), a telescopic slide rail (8), a supporting protection plate (9), a protective layer (10), a first damping hinge (11), a second damping hinge (12), a first supporting plate (13), a second supporting plate (14), an intelligent hook (15) and a telescopic rotary hinge (16). The dust cover (1) is fixed on the chassis of the flat head car, and the electric telescopic slide rail (2) is fixed on the chassis of the flat head car. The rail (2) is fixed under the chassis of the vehicle in the dust cover (1); the telescopic box (3) is fixed on the outermost protruding upper surface of the electric telescopic slide rail (2) and is distributed on both sides of the vehicle head; the buckle (5) is connected to the telescopic box (3) through a rotating hinge (4) and can be buckled into the smart card slot of the first support plate (13); the smart net-releasing hook (6) is fixed on the upper end of the second support plate (14); one end of the protective net (7) is fixed to the front end of the protective layer (10) and the front end of the telescopic box (3); and the other end is clamped on the smart net-releasing hook (6). The telescopic slide rail (8) is on the hook of the electric telescopic slide rail (2), the supporting protection plate (9) is connected to the two electric telescopic slide rails (2) through the first damping hinge (11), and the rollers at both ends of the first damping hinge (11) connected in the supporting protection plate (9) need to be embedded in the telescopic slide rail (8), the protective layer (10) is fixed to the supporting protection plate (9) by an adhesive, and the first supporting plate (13) is fixed to the outermost protruding upper surface of the electric telescopic slide rail (2) and is connected to the telescopic boxes ( 3) is fixed, the second support plate (14) is connected to the first support plate (13) through the second damping hinge (12), the intelligent hook (15) is fixed to the upper ends of the double-layer material plates on both sides of the telescopic box (3), the angle between the telescopic box (3) and the horizontal plane and the angle between the protective layer (10) and the horizontal plane are both θ, 135°<θ<150°, the angle between the supporting protective plate (9) and the horizontal plane is α, 160°<α<180°, and the angle between the second support plate (14) and the horizontal plane is β, 100°<β<120°; If the collision sensor detects that the pedestrian is at a dangerous distance, the hazard alarm will start to sound, warning the driver to take braking measures immediately; if the pedestrian is detected to be at half the sum of the dangerous distance and the inevitable distance of collision and the driver does not brake the vehicle, the vehicle control center will immediately take over control and brake the vehicle according to the distance between the pedestrian and the vehicle; S101: If it is detected that the pedestrian is at the inevitable collision distance, the vehicle control center completely brakes the vehicle and the collision generator starts to work. First, the electric telescopic slide rail (2) slides forward. At the same time, the buckle (5) in the card slot of the first support plate (13) equipped with the sensor pops out. At the same time, the telescopic box (3) and the front end of the protective layer (10) fixed to the electric telescopic slide rail (2) extend forward. The protective net (7) originally connected to the front end of the protective layer (10) and the upper end of the second support plate (14) in a relaxed state is tensioned. At the same time, the compressible high-elastic arc-shaped protective layer (10) is pulled out from the gap between the chassis and the supporting protective plate (9). The supporting protective plate (9) slides forward driven by the protective layer (10) and the electric telescopic slide rail (2). When the pedestrian's legs collide with the front end of the protective layer (10), the complete braking continues until the pedestrian's head falls on the protective net (7) at time t1; S102: If it is detected that the chest of the pedestrian is within one-fourth of the vehicle width w on the left and right sides of the longitudinal centerline, the vehicle control center controls the current vehicle speed so that the device in front of the flat-head vehicle and the pedestrian holding the protective net (7) on the device move forward 10 meters together; if it is detected that the legs of the pedestrian are within one-fourth of the vehicle width w on the left and right sides of the longitudinal centerline, the vehicle control center immediately fully brakes the vehicle and releases the intelligent net release hook (6). During the process of the vehicle control center fully braking the vehicle to a standstill, the supporting protection plate (9) will slide to the ground; if it is not detected that the legs of the pedestrian are within one-fourth of the vehicle width w on the left and right sides of the longitudinal centerline, the vehicle control center fully brakes the vehicle to a standstill; S103: If it is detected that the chest of the pedestrian is within one-quarter of the vehicle width w of the left and right side lines of the front of the vehicle, the vehicle control center controls the current vehicle speed so that the device in front of the flat-head vehicle and the pedestrian holding the protective net on the device move forward 10m to step S102; if the vehicle control center completely brakes the vehicle for 10m and detects that the pedestrian has not completed step S102, that is, the pedestrian has not moved autonomously to the area specified in step S102, the vehicle control center completely brakes the vehicle to a standstill, at which time the smart hook (15) is released, and the retractable double-layer material plate on the outside of the retractable box (3) is rotated to the ground through the retractable rotating hinge (16).

2. According to claim 1, an intelligent device for converting a flat-head vehicle into a long-head vehicle to protect pedestrians, It is characterized in that The device can be installed in the blind spot in front of the vehicle, does not occupy the driver's normal driving field of vision, and can ensure the original normal driving.

3. According to claim 1, an intelligent device for converting a flat-head vehicle into a long-head vehicle to protect pedestrians, It is characterized in that The collision generator also includes a limiting block, which is placed on the first damping hinge and the second damping hinge, so that the minimum angle formed by the supporting protection plate and the horizontal plane is 160°, the minimum angle between the second supporting plate and the horizontal plane is 100°, and the minimum angle between the telescopic box and the protective layer and the horizontal plane is 135°.

4. According to claim 1, an intelligent device for converting a flat-head vehicle into a long-head vehicle to protect pedestrians, It is characterized in that Assuming that the speed of a flat-head truck is v, the distance between the pedestrian and the front of the truck is d, and the friction between the vehicle and the road is miu, the criterion for judging the dangerous distance d at which the pedestrian and the front of the flat-head truck have a collision risk is: When , it is considered that there is a risk of collision between the person and the vehicle, where g is the local gravitational acceleration.

5. According to claim 1, an intelligent device for converting a flat-head vehicle into a long-head vehicle to protect pedestrians, It is characterized in that Assuming that the speed of a flat-head vehicle is v, the distance between the pedestrian and the front of the vehicle is d, and the friction between the vehicle and the road is miu, the braking degree of the vehicle k is expressed by the method of braking the vehicle based on the distance between the pedestrian and the vehicle, which is To ensure safety and passenger comfort, the degree of braking gradually increases as the distance between passengers decreases. When d = v2 / (miu*g), the vehicle brakes 50%; when d = v2 / (2*miu*g), the vehicle brakes completely.

6. The intelligent device for converting a flat-head vehicle into a long-head vehicle to protect pedestrians according to claim 1, It is characterized in that The criterion for judging whether a collision between a pedestrian and a vehicle is inevitable is: Assuming that the speed of a flat-head vehicle is v, the distance between the pedestrian and the front of the vehicle is d, and the friction between the vehicle and the road is miu, then the criterion for judging the distance d between the pedestrian and the front of the flat-head vehicle is: When a person-vehicle accident is considered inevitable.

7. The intelligent device for converting a flat-head vehicle into a long-head vehicle to protect pedestrians according to claim 1, It is characterized in that This device is combined with the vehicle control center. If it is detected that the pedestrian is at half the sum of the dangerous distance and the inevitable collision distance and the driver does not brake the vehicle, the vehicle control center immediately takes over the control, and the control process is S101 to S103.

8. The intelligent device for converting a flat-head vehicle into a long-head vehicle to protect pedestrians according to claim 1, It is characterized in that The second support plate and the two outer retractable plates of the telescopic box are both composed of two layers of materials. The layer that may come into contact with the human body is an organic polymer material with a buffering function, and the other layer is a hard material with good wear resistance. The protective layer is made of a soft material with high resilience, and the first support plate is made of a metal material that meets the strength and stiffness requirements.

9. The intelligent device for converting a flat-head vehicle into a long-head vehicle to protect pedestrians according to claim 1, It is characterized in that When the device is in a compressed state, its thickness depends on the length of the outermost telescopic plate in the telescopic box. The shorter the length of the outermost telescopic plate, the smaller its thickness after compression, that is, the smaller the compressed thickness of the entire device.

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