CN212541053U

CN212541053U - AEB pedestrian function development system

Info

Publication number: CN212541053U
Application number: CN202020798154.0U
Authority: CN
Inventors: 唐星宇; 雍建军; 李建周; 阮小光; 蒋先庆
Original assignee: SAIC General Motors Corp Ltd; Pan Asia Technical Automotive Center Co Ltd
Current assignee: SAIC General Motors Corp Ltd; Pan Asia Technical Automotive Center Co Ltd
Priority date: 2020-05-14
Filing date: 2020-05-14
Publication date: 2021-02-12
Anticipated expiration: 2030-05-14

Abstract

The utility model provides a AEB pedestrian function development system, include: a communication module configured to control signal communication between the AEB pedestrian function development systems; a dummy module configured to simulate a dummy movement action according to a signal from the communication module; and a sensing module configured to sense a test vehicle position and send a signal to the dummy module through the communication module; wherein the sensing module acquires the position and speed of the test measurement by means of a laser transmitter, a laser receiver and a photoelectric switch.

Description

AEB pedestrian function development system

Technical Field

The utility model relates to an automotive filed, say so, relate to intelligent driver assistance in the automotive filed.

Background

Aeb (autonomous ignition braking) is an automatic Emergency braking technique. Automatic Emergency Braking (AEB) systems can achieve automatic braking to avoid or mitigate collisions when there are cars, buses, trucks, motorcycles, and pedestrians or other obstacles in front of the vehicle and the driver cannot take turns or brakes in time to avoid collisions because of inattention. For the intelligent driving assistance technology, standards such as CNCAP and Euro NCAP exist at home and abroad, but special systems are still required to be used in different standards to develop AEB pedestrian functions.

Most of the existing AEB function analysis and verification systems adopt high-precision positioning equipment to accurately measure the position of a vehicle. The device is complex and expensive in cost, wherein the used dummy is mostly a dummy with a fixed posture, and both arms and both legs cannot swing and cannot truly simulate pedestrians. In this case, the AEB system can only test a fixed-attitude dummy, but not necessarily brake an active pedestrian. In the existing standard, although the arms or legs of part of the dummy can swing, the rotation of the motor needs to be converted into the swing by adopting a mechanical structure in the dummy, the number of transmission parts is large, the structure is complex, the damage is easy after the impact, the use cost is high, and the repeated utilization is not facilitated.

Therefore, there is a need for an AEB pedestrian function development system that addresses the above-mentioned functional drawbacks.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides an AEB pedestrian function development system, include: a communication module configured to control signal communication between the AEB pedestrian function development systems; a dummy module configured to simulate a dummy movement action according to a signal from the communication module; and a sensing module configured to sense a test vehicle position and send a signal to the dummy module through the communication module; wherein the sensing module acquires the position and speed of the test measurement by means of a laser transmitter, a laser receiver and a photoelectric switch.

According to the utility model discloses a further embodiment, wherein: the dummy module is driven to move between two points within the AEB pedestrian function development system by a stepper motor arranged vertically with a dummy pallet in the dummy module.

According to the utility model discloses a further embodiment, wherein: the steering engine in the dummy module drives the dummy in the dummy module to swing with both legs, so as to realize the simulation of the dummy movement.

According to the utility model discloses a further embodiment, wherein: the steering engine is installed through nuts and butterfly bolts, and the installation height of the steering engine is adjusted through butterfly bolts, so that simulation of dummy bodies with different heights is achieved.

According to the utility model discloses a further embodiment, wherein: the communication module is controlled by an infrared remote controller, so that the control of a dummy module and an induction module of the AEB pedestrian function development system is realized.

According to the utility model discloses a further embodiment, wherein: the infrared remote controller is provided with a stop key, a motion key, a return key, a scene key and a speed key so as to match different scenes and test requirements of preset values in the AEB pedestrian function development system.

According to the utility model discloses a further embodiment, wherein: laser receiver among the response module installs in black box to build local low light environment for laser receiver, promote the accuracy that laser received.

According to the utility model discloses a further embodiment, wherein: the laser transmitter in the sensing module is mounted on the height-adjustable cross brace structure so as to be accurately aligned with the laser receiver.

According to the utility model discloses a further embodiment, wherein: the mechanical parts in the communication module, the dummy module and the induction module are processed by plastic plates.

According to the utility model discloses a AEB pedestrian function development system has following advantage: 1. the two steering engines directly drive the two legs to swing, no transmission parts are needed, and the structure is simple and compact; 2. the position of the vehicle is obtained by the photoelectric switch, so that the equipment cost is greatly saved; 3. the working condition is set by adopting an infrared remote controller, so that the operation is convenient; 4. the stepping motor is vertically arranged, and the flexibility of the synchronous belt is utilized, so that a guide wheel is not needed, and a transmission structure is simplified.

Drawings

Fig. 1 shows a basic arrangement of an AEB pedestrian function development system according to an embodiment of the present invention.

Fig. 2 shows a key design of an infrared remote controller according to the present invention.

Detailed Description

The following description is of some of the several embodiments of the present invention in order to provide a basic understanding of the invention. It is not intended to identify key or critical elements of the invention or to delineate the scope of the invention.

For the sake of brevity and illustrative purposes, the principles of the present invention are described herein primarily with reference to exemplary embodiments thereof. However, those skilled in the art will readily recognize that the same principles are equally applicable to all types of application business process orchestration methods and systems, and that these same principles, as well as any such variations, may be implemented therein without departing from the true spirit and scope of the present patent application.

Moreover, in the following description, reference is made to the accompanying drawings that illustrate certain exemplary embodiments. Electrical, mechanical, logical, and structural changes may be made to these embodiments without departing from the spirit and scope of the present invention. In addition, while a feature of the invention may have been disclosed with respect to only one of several implementations/embodiments, such feature may be combined with one or more other features of the other implementations/embodiments as may be desired and/or advantageous for any given or identified function. The following description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is defined by the appended claims and their equivalents.

Terms such as "comprising" and "comprises" mean that, in addition to having elements (modules) and modules directly and explicitly stated in the description and claims, the solution of the invention does not exclude other elements (modules) and modules not directly or explicitly stated.

Fig. 1 shows a basic arrangement of an AEB pedestrian function development system according to an embodiment of the present invention. As shown in fig. 1, the vehicle 101 travels rightward in the arrow direction. A laser transmitter 102 and a laser receiver 103 are provided on the path of travel of the vehicle 101 for detecting the arrival of the vehicle at a predetermined test position and activating the movement of the dummy 106 between a starting point 104 and a starting point 105. The position of the vehicle detected by the laser transmitter 102 and the laser receiver 103 to the dummy 106 is referred to as the measurement distance d, the length of which can be adjusted to the vehicle speed depending on the test requirements. Specifically realize the subassembly of AEB pedestrian function development system divide into mechanical component part and electronic components part, and wherein mechanical component mainly includes the following item: step motor layer board, dummy layer board, driven pulley layer board, synchronous pulley, hold-in range, steering wheel mount pad, laser emitter elevating platform and laser receiver mounting box, and wherein electronic component mainly includes: two steering engines, steering engine driver, main control singlechip, step motor driver, step motor, lithium cell, photoelectric switch, communication singlechip, wherein the lithium cell is preferably 60V lithium cell, and communication singlechip communicates with 4 5V lithium cells with two pairs of 2.4G wireless communication modules.

Whole utility model discloses mainly realize wholly arranging based on the CNCAP scene to the CNCAP test that is equipped with pedestrian's automatic emergency braking system vehicle, the vehicle is gone along test place central line. If the test site has no marked central line, two road piles are placed according to the safe running width of the vehicle, and the middle line between the road piles of the test site is the central line of the vehicle path. The starting positions of the dummy movement are set on the left and right sides of the center line, and in the present embodiment, the starting point 1 and the starting point 2 are respectively at the right 6 meters and the left 4 meters of the center line (with respect to the vehicle traveling direction). The dummy of the system is arranged on a dummy supporting plate and is dragged by a synchronous belt, and the two legs of the dummy are driven by two steering engines to swing. The photoelectric switch light is arranged on a vehicle running track to acquire the position information of the vehicle, and the dummy motion is triggered at a proper time according to the standard of the CNCAP, so that the distance d between the installation position and the dummy motion track can be changed according to the vehicle speed to ensure that the time for driving the dummy 106 from a starting point to a collision position at a constant speed is longer than the time for driving the dummy 106 from a starting point to a collision position at the constant speed according to the vehicle speed 101. In the CNCAP standard, the maximum vehicle speed is 60Km/h, so the distance d is at least 80 m. In the practical development process of the system, the vehicle speed is not necessarily tested to 60Km/h, and the longer the constant-speed running distance is, the greater the driving difficulty of a driver is, the greater the error is, so that if the highest vehicle speed is tested to be less than 60Km/h, the distance d can be reduced. For example, when the highest test vehicle speed is 50Km/h, the distance d is 70m at the minimum; when the highest test vehicle speed is 40Km/h, the distance d is 50m at the minimum; when the highest test vehicle speed is 30Km/h, the distance d is 40m at the minimum; when the highest test vehicle speed is 20Km/h, the minimum value of the distance d is 30 m. Other test vehicle speeds are possible depending on the test requirements, and therefore the distance d may also vary depending on the vehicle speed.

The dummy is arranged on the dummy supporting plate, and the dummy supporting plate is dragged by the synchronous belt to realize the motion of the dummy. One side of the synchronous belt is pressed by the pressing strip, and the other side of the synchronous belt penetrates through the guide groove. The guide groove is used for avoiding the supporting plate from deflecting and swinging left and right due to the fact that the ground is not flat enough in the moving process. The trunk of the dummy is arranged on a transparent support rod which is vertical to the dummy supporting plate, wherein the two legs of the dummy are tied on the leg mounting seat of the dummy. The steering engine mounting seat can be formed by compressing a plurality of plastic plates by bolts, and has the advantage of convenient processing. A nut is embedded in the mounting seat, and the mounting seat can be fixed on the transparent supporting rod through a corresponding butterfly bolt, so that the mounting height of the two legs of the dummy can be manually adjusted. The trunk and legs of the dummy are preferably made of sponge, which avoids damage to the vehicle after impact, and other materials suitable for making the trunk and legs of the dummy are possible. Meanwhile, in order to avoid damage to the dummy after collision, the transparent support rod is connected with the dummy support plate through a sliding groove. The chute connection has the advantage that after the vehicle impacts the dummy, the dummy pops up together with the transparent support rod. The structure of the chute is simple, specifically, a stepped shaft is turned on the transparent support rod, and two small flat plates with different apertures are fixed on the bottom plate by using countersunk bolts, so that complicated machining or die sinking is avoided.

The power for moving the dummy is derived from the stepper motor. In order to simplify the structure, according to the utility model discloses a step motor is arranged perpendicularly to bottom plate to it is fixed through bolt and sleeve, fixes through four bolts and sleeve in this embodiment. The output shaft of the stepping motor is directly connected with the synchronous belt wheel and transmits torque through a flat key. The synchronous belt transmission has the advantages that the belt is prevented from slipping, and the position and the speed of the dummy can not be influenced. The timing belt is mounted vertically near the stepper motor and horizontally at the dummy pallet. Since the belt has flexibility, the change of the belt installation direction does not affect the transmission. The lower surface of the mounting bottom plate of the stepping motor is preferably adhered with a rubber pad, so that the friction coefficient between the ground and the bottom plate is increased. Meanwhile, the barbell disc is placed on the bottom plate, so that the bottom plate is prevented from moving when the stepping motor operates.

The stepping motor is connected with the driven belt wheel through the synchronous belt, the driven belt wheel does not transmit power, two deep groove ball bearings are embedded in the driven belt wheel, and the driven belt wheel is installed on the bottom plate through a plug bolt. Also preferably adhered under the base plate is a rubber mat to increase the coefficient of friction. While it is preferable to place a weight, such as a barbell disc, on the base plate to apply pressure to prevent the driven pulley from moving.

The laser receiver is installed in the black box, and the laser transmitter is installed on the elevating platform. This is because the road surface may not be perfectly flat and the laser transmitter may not be aligned with the laser receiver if mounted on a platform of fixed height. A lift table is used to mount the laser emitters. The elevating platform can adopt the common elevation structure in machinery field, preferably adopts the bridging structure, and wherein the screw rod one end that adjusting knob connects is right-handed screw, and the other end is left-handed screw, rotates the knob and just can adjust the height of elevating platform. Because the photoelectric switch is only suitable for being used in an environment with weak light, the laser receiver is arranged in the black box for avoiding the false triggering of the photoelectric switch caused by outdoor strong light, thereby creating a local weak light environment. In order to effectively detect the arrival of the vehicle, the installation height of the photoelectric switch is larger than the minimum ground clearance of the vehicle. Meanwhile, in order to facilitate the alignment of the laser transmitter and the receiver, white paper can be pasted inside a black box of the laser receiver, so that when the height and the angle of the laser transmitter are adjusted, a red light spot of laser can be observed, and the alignment of the laser transmitter and the receiver is realized.

The control of the stepping motor and the wireless communication with the stepping motor can be realized by utilizing the two single-chip microcomputers. One of them is a main control single chip microcomputer, and the other is a communication single chip microcomputer. The main control singlechip preferably has two serial ports, an infrared remote control, a PWM ripples output, a buzzer, an pilot lamp, two contact switches and a 5V power output. The main control singlechip preferably uses a 5V lithium battery to supply power, two serial ports are preferably connected with two 2.4G wireless communication modules respectively, one of the serial ports receives signals from the communication singlechip, and the other serial port sends a movement instruction to the steering engine driver. The main control singlechip outputs the frequency of the PWM wave to control the rotating speed of the stepping motor, and the high and low voltage output by the other I/O port can control the steering of the stepping motor. In order to observe the running state of the stepping motor, a PWM wave signal for controlling the rotating speed of the motor can be connected with an indicator light, the indicator light is turned on when the stepping motor rotates, and the indicator light is turned off when the stepping motor stops. Because the placing position of the photoelectric switch is adjustable, the program in the single chip microcomputer needs to be synchronously changed, and in order to avoid the need of rewriting the program every time, two contact switches are adopted to set the mounting distance d of the photoelectric switch. When the infrared remote controller is used, in order to observe whether the single chip microcomputer receives a signal or not, the buzzer buzzes once after the single chip microcomputer receives a remote control signal.

Fig. 2 shows a key design of an infrared remote controller according to the present invention. A left movement key L and a right movement key R of the remote controller are used for moving the dummy to a starting point; a stop key S for stopping the motion of the dummy; after the left quick return key LR is used for the scene CVFA test, the dummy is quickly moved to the starting point 104 in fig. 1; after the RR key is quickly returned to the right for the scene CVNA test, the dummy is quickly moved to the starting point 105 in the figure 1; 20.

keys

30, 40, 50 and 60 are used to set the vehicle speed; the F25, F50, N25, and N75 keys are used to set different scenes, e.g., N for CVNA scenes and F for CVFA scenes. Different scenarios can also be set by programming the system.

The communication singlechip needs to be provided with a serial port and a buzzer and also adopts a 5V lithium battery for power supply. This battery also supplies power to laser receiver simultaneously, and laser emitter then adopts another 5V lithium cell power supply, and a I/O mouth of communication singlechip is connected to laser receiver's signal line, and the communication singlechip converts received high low voltage signal into serial ports signal, then sends main control singlechip to through 2.4G wireless communication module.

The steering wheel driver also can adopt the 5V lithium cell power supply, therefore the drive part of dummy's both legs is small, can hide inside them the dummy trunk, avoids the vehicle striking to cause the damage to them. The steering engine driver has a secondary development function, receives serial port signals of the main control single chip microcomputer through the 2.4G communication module and controls the steering engine to rotate in a reciprocating mode, and therefore the swing of the two legs of the dummy is achieved.

The existing AEB pedestrian function development system adopts a high-precision GPS to acquire the position and the speed of a vehicle, while the existing GPS system has the selling price of hundreds of thousands, thereby greatly increasing the cost of the system. And according to the utility model discloses a AEB pedestrian function development system adopts photoelectric switch to acquire the vehicle position, and photoelectric switch's selling price is only tens yuan, the manufacturing cost who saves well.

The laser receiver is installed in the black box, so that the photoelectric switch can be successfully applied outdoors. The laser emitter is installed on the lifting platform, so that the photoelectric switch can be quickly aligned on the road surface.

The swing of the two legs of the dummy is directly driven by two steering gears without a driving part, the structure is simple, the volume of the steering gears is small, and the structure is small and compact. The steering wheel mounting height can be adjusted through butterfly bolts, so that the steering wheel mounting height adjusting device is suitable for dummy bodies with different heights.

The stepping motor, the driving belt wheel and the driven belt wheel are vertically arranged, the direction of the synchronous belt is automatically changed by using the flexibility of the synchronous belt, and a guide wheel is not needed, so that the whole transmission system is simpler.

The remote control device can carry an infrared remote controller to remotely control the dummy to move and set a scene, and is convenient to operate. The left moving key and the right moving key can quickly move the dummy to the position near the starting point, and the right fine tuning key can accurately stop the dummy at the starting point. The left quick return key and the right quick return key can enable the dummy to return by one key, and repeated adjustment is avoided.

The main mechanical structural parts can be obtained by processing plastic plates, die sinking or numerical control processing is not needed, processing is convenient, and cost is saved.

The above examples mainly illustrate an AEB pedestrian function development system according to the present invention. Although only a few specific embodiments of the invention have been described, those skilled in the art will appreciate that the invention can be embodied in many other forms without departing from the spirit or scope thereof. Accordingly, the present examples and embodiments are to be considered as illustrative and not restrictive, and various modifications and substitutions may be made thereto without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. An AEB pedestrian function development system, comprising:

a communication module configured to control signal communication between the AEB pedestrian function development systems;

a dummy module configured to simulate a dummy movement action according to a signal from the communication module; and

a sensing module configured to sense a test vehicle position and send a signal to the dummy module through the communication module;

wherein the content of the first and second substances,

the sensing module acquires the tested vehicle position and speed by means of a laser transmitter, a laser receiver and a photoelectric switch.

2. The AEB pedestrian function development system of claim 1, wherein:

the dummy module is driven to move between two points within the AEB pedestrian function development system by a stepper motor arranged vertically with a dummy pallet in the dummy module.

3. The AEB pedestrian function development system of claim 2, wherein:

the steering engine in the dummy module drives the dummy in the dummy module to swing with both legs, so as to realize the simulation of the dummy movement.

4. The AEB pedestrian function development system of claim 3, wherein:

the steering engine is installed through nuts and butterfly bolts, and the installation height of the steering engine is adjusted through butterfly bolts, so that simulation of dummy bodies with different heights is achieved.

5. The AEB pedestrian function development system of claim 4, wherein:

the communication module is controlled by an infrared remote controller, so that the control of a dummy module and an induction module of the AEB pedestrian function development system is realized.

6. The AEB pedestrian function development system of claim 5, wherein:

the infrared remote controller is provided with a stop key, a motion key, a return key, a scene key and a speed key so as to match different scenes and test requirements of preset values in the AEB pedestrian function development system.

7. The AEB pedestrian function development system of claim 6, wherein:

laser receiver among the response module installs in black box to build local low light environment for laser receiver, promote the accuracy that laser received.

8. The AEB pedestrian function development system of claim 7, wherein:

the laser transmitter in the sensing module is mounted on the height-adjustable cross brace structure so as to be accurately aligned with the laser receiver.

9. The AEB pedestrian function development system of claim 8, wherein:

the mechanical parts in the communication module, the dummy module and the induction module are processed by plastic plates.