CN209987887U - Pedestrian collision protection triggering device, pedestrian collision protection device and automobile - Google Patents

Abstract

The utility model discloses a pedestrian collision protection trigger device, pedestrian collision protection device and car, this pedestrian collision protection trigger device include installing support and a plurality of sensor, and a plurality of sensor intervals set up on the installing support, and installing support fixed connection is in the front beam, and the installing support is located between front bumper and the front beam, and the installing support is flexible structure, and the sensor is angle sensor or acceleration sensor for detect the angle change information or the acceleration size information of installing support. The pedestrian collision protection triggering device, the pedestrian collision protection device and the automobile of the utility model only need to arrange a plurality of sensors on the mounting bracket, and all the sensors can sense the collision because the mounting bracket is integral, so the number of the sensors can be less, the cost is saved, and the structure is simple; meanwhile, collision results can be mutually verified through information obtained by two adjacent sensors, the method is reliable and stable, and pedestrian collision can be effectively identified.

Description

Pedestrian collision protection triggering device, pedestrian collision protection device and automobile

Technical Field

The utility model relates to the field of automotive technology, especially, relate to a pedestrian collision protection trigger device, pedestrian collision protection device and car.

Background

With the development of technology, automobiles become necessities of life of people gradually, more and more families have automobiles for riding instead of walk, and great convenience is provided for life of people. However, with the rapid increase of the automobile holding capacity, the number of traffic accidents is increased, and particularly when the automobile collides with a pedestrian, the pedestrian has no self-protection capability at all, and the casualties of people are easily caused. With the development of automobile safety technology and the increase of public safety awareness, the pedestrian protection function is increasingly concerned and gradually becomes a function of key consideration for vehicle enterprises. How to provide maximum injury avoidance for pedestrians when the automobile collides with the pedestrians is gradually a hot problem for research of various national regulations and vehicle enterprises.

Currently, an acceleration sensor or a pressure pipe is generally installed on a front bumper to sense pedestrian collision information, and the pedestrian collision information is processed by an algorithm and is activated by pedestrian protection equipment such as a cabin cover is bounced or a pedestrian protection safety airbag is detonated, so that the purpose of alleviating the head collision injury of pedestrians is achieved. However, the disadvantages of implementing pedestrian protection algorithm identification by an acceleration sensor are: if it is necessary to accurately and effectively recognize a pedestrian collision pattern, in order to sense a sufficient acceleration signal, it is necessary to arrange more acceleration sensors on the front bumper, resulting in higher cost and difficulty in effectively distinguishing a pedestrian or other object collision. The pedestrian protection solution by pressure tube sensors has the drawbacks that: the pressure is obviously changed by the temperature, and the material of the pressure pipe is easily influenced by the temperature, so that the pressure pipe sensor is developed in the early stage, a plurality of tests at different temperatures are needed to calibrate the system, and only tests at certain specific temperatures can be carried out, and the stability and the accuracy of the protection function of people at all temperatures can not be ensured; and, because pressure sensor is very sensitive, during the manometer pipe need embed the foam in, the design earlier stage of development need carry out a large amount of experiments and simulation work and carry out manometer pipe mounted position and installation depth research, consequently, adopt manometer pipe pedestrian protection scheme research and development cost height and system stability degree to receive the temperature influence great.

The foregoing description is provided for general background information and is not admitted to be prior art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a lower and pedestrian collision protection trigger device, pedestrian collision protection device and car that can effectively discern the pedestrian collision of cost.

The utility model provides a pedestrian collision protection trigger device for install on the car, this car includes front bumper and front beam, this pedestrian collision protection trigger device includes installing support and a plurality of sensor, these a plurality of sensor intervals set up on this installing support, this installing support fixed connection is in this front beam, and this installing support is located between this front bumper and this front beam, this installing support is deformable structure, this sensor is angle sensor or acceleration sensor, an angle change information or the acceleration size information for detect the installing support.

Further, the mounting bracket is made of a metal thin plate, which extends in the length direction of the front bumper.

Further, the mounting bracket comprises a main body part with a triangular cross section, one side of the main body part is mounted on the front cross beam, a mounting plate extending out of the main body part is arranged on the main body part, and the sensor is mounted on the mounting plate.

Further, the mounting plate is located on the side of the body portion opposite to the front cross beam, and the sensor is mounted on the side of the mounting plate close to the front cross beam.

Furthermore, the number of the sensors is three, and the sensors are uniformly distributed on the mounting bracket along the length direction of the front bumper.

Further, the sensor is an angular velocity sensor, and is used for acquiring angular velocity information of the mounting bracket and further acquiring angle change information of the mounting bracket; or

The sensor is an acceleration sensor and is used for acquiring the acceleration information of the mounting bracket.

Further, the pedestrian collision protection triggering device further comprises a control module and a protection mechanism, the sensor and the protection mechanism are both connected to the control module, the sensor is used for sending angle change information or acceleration information to the control module, the control module is used for judging whether a pedestrian collision occurs according to the angle change information or the acceleration information, and the protection mechanism is triggered to be opened to protect a pedestrian when the pedestrian collision occurs.

Further, the pedestrian collision protection triggering device further comprises a power module, the power module is connected to the control module, and the power module is used for supplying power to the control module.

Furthermore, a first threshold and a second threshold are preset in the control module, the first threshold is larger than the second threshold, and when the angle change information or the acceleration information obtained by one sensor is larger than or equal to the first threshold and the angle change information or the acceleration information obtained by another sensor adjacent to the sensor is larger than or equal to the second threshold, the control module judges that a pedestrian collision occurs; when the angle change information or the acceleration information obtained by one sensor is larger than a first threshold value, and the angle change information or the acceleration information obtained by another sensor adjacent to the sensor is smaller than a second threshold value, or when the angle change information or the acceleration information obtained by two adjacent sensors are smaller than the first threshold value, the control module judges that no pedestrian collision occurs.

The utility model also provides a pedestrian collision protection device, including above-mentioned pedestrian collision protection trigger device and protection mechanism, this pedestrian collision protection trigger device triggers this protection mechanism to open when detecting to take place pedestrian's collision.

The utility model also provides a car, including front bumper, front beam and above-mentioned pedestrian collision protection device, this installing support fixed connection is in this front beam, and this installing support is located between this front bumper and this front beam.

The utility model provides a pedestrian collision protection trigger device, pedestrian collision protection device and car only need set up several sensors on the installing support, and because the installing support is whole, so all sensors can perceive the collision, indicate pedestrian's collision when the angle change information or the acceleration size information that two adjacent sensors obtained are all great, so the number of sensor can be less, saved the cost, and simple structure; meanwhile, collision results can be mutually verified through information obtained by two adjacent sensors, the method is reliable and stable, and pedestrian collision can be effectively identified.

Drawings

Fig. 1 is a schematic structural view of a pedestrian collision protection triggering device installed on an automobile according to an embodiment of the present invention.

Fig. 2 is a schematic view of another angle-mounted structure of the pedestrian collision protection triggering device in fig. 1.

Fig. 3 is a schematic view of the pedestrian collision protection triggering device in fig. 1 in a state after being collided by a pedestrian.

Fig. 4 is a schematic structural diagram of a frame of the pedestrian collision protection triggering device and the protection mechanism in fig. 1.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

Referring to fig. 1 and 2, an embodiment of the present invention provides a triggering device for pedestrian collision protection, which is installed on a vehicle, the vehicle includes a front bumper 10 and a front cross member 20, the triggering device for pedestrian collision protection includes a mounting bracket 40 and a plurality of sensors 50, the plurality of sensors 50 are disposed on the mounting bracket 40 at intervals, the mounting bracket 40 is fixedly connected to the front cross member 20, and the mounting bracket 40 is located between the front bumper 10 and the front cross member 20. The mounting bracket 40 is a deformable structure. The sensor 50 is an angle sensor or an acceleration sensor, and is configured to detect angle change information or acceleration magnitude information of the mounting bracket 40.

In the present embodiment, the mounting bracket 40 is made of a thin metal plate, which extends in the longitudinal direction of the front bumper 10. Specifically, the mounting bracket 40 may be made of a sheet of steel.

In this embodiment, the mounting bracket 40 includes a main body 401 having a triangular cross section, one side of the main body 401 is mounted to the front cross member 20, a mounting plate 402 extends from the main body 401 to the outside of the main body 401, and the sensor 50 is mounted on the mounting plate 402. Specifically, the mounting plate 402 is located on the side of the body portion 401 opposite the front cross member 20, and the sensor 50 is mounted on the side of the mounting plate 402 near the front cross member 20. Thus, in the event of a collision, the sensor head 50 can be protected from damage, and the mounting bracket 40 is deformed by direct contact with the front bumper 10.

In this embodiment, three sensors 50 are uniformly arranged on the mounting bracket 40 along the length direction of the front bumper 10. It is understood that the number of the sensors 50 may be two or more, and is not limited herein.

In this embodiment, the sensor 50 is an angular velocity sensor, and is configured to obtain angular velocity information of the mounting bracket 40, further obtain angle change information of the mounting bracket 40, and specifically obtain the angle change information by integrating the angular velocity information. In another embodiment, the sensor 50 is an acceleration sensor for acquiring information about the magnitude of acceleration of the mounting bracket 40.

Fig. 1 shows a normal state of the pedestrian collision protection triggering device in the absence of a pedestrian collision. As shown in fig. 3, when a pedestrian collides, the pedestrian first collides with the front bumper 10, the front bumper 10 is deformed rearward of the vehicle, and after the front bumper 10 is deformed to a certain extent, the front bumper 10 contacts the mounting bracket 40, and the mounting bracket 40 is deformed by the collision, and the sensor 50 is displaced accordingly, so that the sensor 50 can measure information about the deformation of the mounting bracket 40, and it is determined whether or not the pedestrian collides.

In the present embodiment, as shown in fig. 4, the triggering device for pedestrian collision protection further includes a control module 60 and a power module 80. Both the sensor 50 and the power module 80 are connected to the control module 60. The sensor 50 is configured to send angle change information or acceleration information to the control module 60, the control module 60 is configured to determine whether a pedestrian collision occurs according to the angle change information or the acceleration information, and trigger the protection mechanism 70 to be turned on to protect a pedestrian when the pedestrian collision occurs, and the power module 80 is configured to supply power to the control module 60.

Specifically, a first threshold and a second threshold are preset in the control module 60, the first threshold is greater than the second threshold, and when the angle change information or the acceleration information obtained by one sensor 50 is greater than or equal to the first threshold and the angle change information or the acceleration information obtained by another sensor 50 adjacent to the sensor 50 is greater than or equal to the second threshold, the control module 60 determines that a pedestrian collision occurs; when the angle change information or the acceleration magnitude information obtained by one sensor 50 is greater than a first threshold value and the angle change information or the acceleration magnitude information obtained by another sensor 50 adjacent to the sensor 50 is less than a second threshold value, or when the angle change information or the acceleration magnitude information obtained by two adjacent sensors 50 is less than the first threshold value, the control module 60 determines that no pedestrian collision has occurred.

The pedestrian collision protection triggering device of the utility model only needs to arrange a plurality of sensors on the mounting bracket, and because the mounting bracket is integral, all the sensors can sense the collision, and the pedestrian collision is indicated when the angle change information or the acceleration information obtained by two adjacent sensors is larger, so the number of the sensors can be less, the cost is saved, and the structure is simple; meanwhile, collision results can be mutually verified through information obtained by two adjacent sensors, the method is reliable and stable, and pedestrian collision can be effectively identified.

The utility model also provides a pedestrian collision protection device, including above-mentioned pedestrian protection trigger device and protection mechanism 70, this pedestrian collision protection trigger device triggers this protection mechanism 70 and opens when detecting to take place pedestrian's collision. Specifically, the protection mechanism 70 may be coupled to the control module 60 to be controlled to open by the control module 60.

In this embodiment, the protection mechanism 70 includes a pop-up hood and/or a pedestrian protection airbag. When the pedestrian collides, the bounce type hood bounces and/or the pedestrian safety protection safety airbag is opened, so that the aim of reducing the head collision injury of the pedestrian is fulfilled.

The utility model also provides an automobile, including front bumper 10, front beam 20 and above-mentioned pedestrian collision protection device. The mounting bracket 40 of the pedestrian collision protection triggering apparatus is fixedly attached to the front cross member 20, and the mounting bracket 40 is located between the front bumper 10 and the front cross member 20.

In this document, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms can be understood in a specific case to those of ordinary skill in the art.

In this document, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the sake of clarity and convenience of description of the technical solutions, and thus, should not be construed as limiting the present invention.

As used herein, the meaning of "a plurality" or "a plurality" is two or more unless otherwise specified.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

As used herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including not only those elements listed, but also other elements not expressly listed.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (8)

1. A pedestrian collision protection triggering device is used for being installed on an automobile, the automobile comprises a front bumper (10) and a front cross beam (20), the pedestrian collision protection triggering device is characterized by comprising an installation support (40) and a plurality of sensors (50), the sensors (50) are arranged on the installation support (40) at intervals, the installation support (40) is fixedly connected to the front cross beam (20), the installation support (40) is located between the front bumper (10) and the front cross beam (20), the installation support (40) is of a deformable structure, the sensors (50) are angle sensors or acceleration sensors and used for detecting angle change information or acceleration magnitude information of the installation support (40), the installation support (40) comprises a body part (401) with a triangular cross section, one side of the body part (401) is installed on the front cross beam (20), the main body (401) is further extended with a mounting plate (402) towards the outer side of the main body (401), the sensor (50) is mounted on the mounting plate (402), the mounting plate (402) is positioned on the side, opposite to the front cross beam (20), of the main body (401), and the sensor (50) is mounted on the side, close to the front cross beam (20), of the mounting plate (402).

2. Triggering device for pedestrian impact protection according to claim 1, characterised in that the mounting bracket (40) is made of sheet metal, which extends in the direction of the length of the front bumper (10).

3. The triggering device for pedestrian impact protection as set forth in claim 1, wherein the number of the sensors (50) is three and is uniformly arranged on the mounting bracket (40) along the length direction of the front bumper (10).

4. The triggering device for pedestrian collision protection according to claim 1, characterized in that the sensor (50) is an angular velocity sensor for acquiring information on the angular velocity of the mounting bracket (40) and thus information on the angular change of the mounting bracket (40); or

The sensor (50) is an acceleration sensor and is used for acquiring the acceleration information of the mounting bracket (40).

5. The triggering device for pedestrian collision protection as defined in claim 1, further comprising a control module (60), wherein the sensor (50) is connected to the control module (60), the sensor (50) is used for sending angle change information or acceleration magnitude information to the control module (60), the control module (60) is used for judging whether a pedestrian collision occurs according to the angle change information or the acceleration magnitude information, and triggering a protection mechanism (70) of the automobile to be opened to protect the pedestrian when the pedestrian collision occurs.

6. The triggering device for pedestrian collision protection according to claim 5, wherein a first threshold value and a second threshold value are preset in the control module (60), the first threshold value is larger than the second threshold value, and when the angle change information or the acceleration magnitude information obtained by one sensor (50) is larger than or equal to the first threshold value and the angle change information or the acceleration magnitude information obtained by another sensor (50) adjacent to the sensor (50) is larger than or equal to the second threshold value, the control module (60) judges that a pedestrian collision occurs; when the angle change information or the acceleration magnitude information obtained by one sensor (50) is larger than a first threshold value, and the angle change information or the acceleration magnitude information obtained by another sensor (50) adjacent to the sensor (50) is smaller than a second threshold value, or when the angle change information or the acceleration magnitude information obtained by two adjacent sensors (50) is smaller than the first threshold value, the control module (60) judges that no pedestrian collision occurs.

7. A pedestrian collision protection apparatus comprising a pedestrian collision protection triggering device according to any one of claims 1 to 6 and a protection mechanism (70), the pedestrian collision protection triggering device triggering the protection mechanism (70) to open upon detection of a pedestrian collision.

8. A motor vehicle comprising a front bumper (10) and a front cross member (20), characterized in that the motor vehicle further comprises a pedestrian impact protection arrangement according to claim 7, the mounting bracket (40) being fixedly connected to the front cross member (20), and the mounting bracket (40) being located between the front bumper (10) and the front cross member (20).

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