CN119687775A - Activating the contact recognition system for safety equipment in the vehicle - Google Patents
Activating the contact recognition system for safety equipment in the vehicle Download PDFInfo
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- CN119687775A CN119687775A CN202411314682.3A CN202411314682A CN119687775A CN 119687775 A CN119687775 A CN 119687775A CN 202411314682 A CN202411314682 A CN 202411314682A CN 119687775 A CN119687775 A CN 119687775A
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Abstract
The invention relates to a contact detection system for activating a vehicle safety device in a vehicle, comprising a contact sensor device for detecting a deformation of a region of a vehicle housing due to a collision of the vehicle. The contact sensor device is designed as a rotation angle sensor device and has a rotatably mounted lever arm and an angle sensor fixed to a support of the vehicle for detecting a rotation angle or a change in rotation angle of the lever arm relative to the angle sensor, a first longitudinal end of the lever arm being supported on the inside of the region of the vehicle housing, a second longitudinal end of the lever arm being rotatably mounted at the angle sensor about the rotation axis, whereby the lever arm can be rotated from a mounting position to a collision position about the rotation axis upon a collision-induced deformation, a resulting change in rotation angle between the lever arm and the angle sensor being detectable, from which a collision can be detected. The invention also relates to a vehicle with such a contact recognition system.
Description
Technical Field
The invention relates to a contact recognition system for activating a vehicle safety device in a vehicle, comprising a contact sensor device for detecting a deformation of a region of a vehicle housing after a collision of the vehicle. The invention further relates to a vehicle having such a contact detection system.
Background
The use of contact recognition systems in vehicles to activate safety devices of the vehicle, which are usually provided as protection devices or warning devices of the vehicle, has been known for many years. In addition to the electronic control unit, such contact recognition systems generally comprise contact sensor means for detecting deformation of the area of the vehicle housing after a collision of the vehicle. The touch sensor device used here uses different measurement principles. For example, contact sensor devices are known in the vehicle sector which measure acceleration, use electrical conductors or pressure sensors or use so-called hose sensors, wherein two pressure sensors are usually arranged at both ends of an elastic hose. In this case, the contact sensor device is usually arranged in an outer region, such as a front region or a side region of the vehicle, in particular for detecting a front or side collision, and typically signals the electronic control unit when a collision is detected, for classifying the collision, in particular for classifying the type and/or severity of the collision, and for controlling or triggering the corresponding safety device.
The known contact sensor devices have the disadvantage that they are not particularly flexible in terms of different installation spaces or do not allow sufficiently reliable collision detection.
Disclosure of Invention
The object of the present invention is therefore to provide a contact detection system for activating safety devices of a vehicle in a vehicle, and a corresponding vehicle having such a contact detection system, the contact sensor arrangement of which is of simple design, while at the same time ensuring a highly reliable detection of collisions, in particular collisions with low collision energy, and having the greatest possible variability in terms of different installation spaces and/or installation positions.
The above-mentioned task is achieved by the full teachings of claim 1 and independent claim 10. Advantageous embodiments and improvements of the invention are described in the dependent claims and in the following description.
The contact detection system according to the invention for activating a safety device of a vehicle in the vehicle has a contact sensor device for detecting a deformation of a region of a vehicle housing after the vehicle has been impacted, wherein the contact sensor device is designed as a rotation angle sensor device and has a rotatably mounted lever arm and an angle sensor, which is fastened to a support of the vehicle, for detecting a rotation angle or a rotation angle change of the lever arm relative to the angle sensor, i.e. a rotation angle or a rotation angle change between the lever arm and the angle sensor. The first longitudinal end of the lever arm is supported on the inside of the region of the vehicle housing, and the second longitudinal end of the lever arm is mounted on the angle sensor so as to be rotatable about the rotational axis, so that, in the event of a crash-induced deformation, the lever arm can be rotated about the rotational axis from the mounted position into the crash position, a resulting change in the rotational angle between the lever arm and the angle sensor being able to be detected, wherein the presence or absence of a crash can be detected from the change in the rotational angle.
The basic consideration of the invention is that the structure of the touch sensor device can be made particularly simple if the touch sensor device is made up of as few component designs as possible and the design of the relevant components is as simple and easy to assemble as possible. The basic considerations of the invention furthermore include that the angle of rotation or the change in the angle of rotation is detected by a detection element, in particular a detection element which is arranged at an angle to the direction of impact, and that the deformation caused by the impact is transmitted directly or indirectly to the detection element, as a result of which an impact detection with particularly high sensitivity and particularly high detection accuracy can be achieved. The basic consideration of the invention is therefore based, inter alia, on the provision of the contact sensor arrangement as a rotation angle sensor arrangement, while the first longitudinal end of the rotatably mounted lever arm is arranged in direct or at least indirect contact with a region of the vehicle housing, and the rotation angle of the lever arm as a result of a deformation of the region of the vehicle housing due to a collision, or a change in the rotation angle of the lever arm as a result of a deformation of the region of the vehicle housing due to a collision, is detected, and a collision is identified accordingly.
The advantage of the embodiment according to the invention is that a contact detection system for activating safety devices in a vehicle is thus provided, which has a simple construction and at the same time can detect collisions, in particular collisions with low collision energy, very reliably and with the highest possible variability for different installation spaces and/or installation positions.
In the framework of the invention, a collision is in particular a contact of the vehicle, preferably of the vehicle housing, with an object of collision outside the vehicle, which results in a plastic or elastic deformation of the region of the vehicle housing. A collision is to be understood in particular as meaning that, due to a low collision speed or a low collision force, no or no touching or collision of the occupant protection device or the occupant restraint device, for example a so-called parking touch, is caused. The collision object may be a further vehicle outside the vehicle concerned, an off-board person, such as a pedestrian or a road boundary.
The safety device which is ultimately actuated or triggered as a result of the contact detection system detecting a deformation of the region of the vehicle housing due to a collision is preferably designed here as a protective device and/or an alarm device of the vehicle. The protection device preferably comprises an occupant protection device, in particular an occupant restraint device and a pedestrian protection device. The occupant restraint device can protect an occupant in a vehicle in the event of a collision, in particular in the event of a strong collision or a strong collision of the vehicle with a collision object, in order to prevent the occupant in the vehicle from being injured as much as possible or at least to reduce the severity of the injury of the occupant in the vehicle, and can be provided as an airbag or as a belt device with a belt tensioner or the like. Pedestrian protection devices, which protect pedestrians in the event of an accident or collision with a vehicle, in order to prevent or at least reduce the severity of injury to the pedestrians as far as possible, can be provided, for example, as bonnet airbags or as actively deployable/erectable bonnet. The warning device preferably comprises a vehicle device, such as a loudspeaker, a display screen and/or a warning or warning light, for example, for emitting an audio and/or visual warning or warning signal to the driver of the vehicle.
The support is preferably provided as a vehicle component of the vehicle or as a section of a vehicle component of the vehicle, which does not have any particular requirements in terms of rigidity or hardness, i.e. it does not have to have a very high rigidity or hardness. However, the support is preferably designed as a rigid support, for example as a rigid vehicle part of the vehicle or as a rigid section of the vehicle part of the vehicle, and therefore has a high rigidity and/or hardness in particular. The support is preferably provided as a body part of the vehicle or as a section of a body part of the vehicle.
The contact sensor device preferably works using the magnetic principle, wherein the angle sensor preferably comprises a hall sensor, and the lever arm preferably comprises a magnet, in particular a permanent magnet. The first longitudinal end of the lever arm is supported directly or indirectly on the inside of the region of the vehicle housing, i.e. towards the vehicle outside, and directly or indirectly on the inside of the region of the vehicle housing. The second longitudinal end of the lever arm is directly or indirectly rotatably fastened to the angle sensor.
In the event of a crash and thus a deformation of the corresponding region of the vehicle housing, the lever arm is rotated or pivoted about the pivot axis by an angle corresponding to the deformation or degree of deformation, wherein the first longitudinal end of the lever arm is in particular in sliding contact with the inner side of the region of the vehicle housing, i.e. can thus be guided slidingly on the inner side. The change in the relative position or rotation angle between the lever arm and the angle sensor due to the rotation and rotational movement of the lever arm is detected by the angle sensor, and whether there is a collision is recognized based on the detected change in the rotation angle. The detectable or detected change in the angle of rotation may in particular be a parameter corresponding to the change in the angle of rotation. Advantageously, the detectable or detected change in the angle of rotation is a changed (absolute) angle of rotation itself, a (relative) change in the angle of rotation (i.e. Delta) or a parameter derived from a changed angle of rotation and/or a change in the angle of rotation.
The installation position refers to the position or the position of the contact sensor device and in particular the lever arm in the stationary state, i.e. before the crash and thus before the crash causes the deformation of the region of the vehicle housing, and the crash position refers to the position or the position of the contact sensor device and in particular the lever arm after the crash causes the deformation of the region of the vehicle housing and thus the rotational and swivelling movement of the lever arm.
In an advantageous embodiment, a predetermined angle of rest of other than 0 ° is formed between the lever arm and the angle sensor in the installed position, wherein the angle of rest is preferably formed as an acute angle, wherein the angle of rest is preferably selected in the range of 10 ° to 85 °, particularly preferably in the range of 30 ° to 45 °. High or suitable sensitivity and detection accuracy of the touch sensor device can thereby be achieved.
In a further advantageous embodiment, in the installed position, the first longitudinal end of the lever arm is elastically preloaded by a preload force against the inside of the region of the vehicle housing. This ensures a permanent contact of the first longitudinal end of the lever arm with the inside of the region of the vehicle housing, thus ensuring that the lever arm reacts immediately to the deformation caused by the collision in the event of a collision. The respective pretensioning is achieved in particular by means of a spring, which is preferably arranged in the region of the pivot axis or in the region of the second longitudinal end of the lever arm that is mounted on the angle sensor, wherein the spring exerts a respective pretensioning force on the lever arm. In the case of an elastic pretension of the first longitudinal end of the lever arm, the rigidity or stiffness of the support is advantageously greater than the pretension, in particular greater than the deformation caused by the pretension.
In a further advantageous embodiment, the magnitude of the pretension force is dependent on a predetermined minimum impact force to be detected. The pretension advantageously corresponds to a predetermined minimum impact force to be detected. The predetermined minimum collision force to be detected represents the collision force with which the contact sensor arrangement is to detect a collision.
In a further advantageous embodiment, a roller/rolling element, which is mounted in particular rotatably about a roller axis of rotation, is provided at the first longitudinal end of the lever arm, wherein the roller is supported on the inside of the region of the vehicle housing, i.e. directly or indirectly against the inside of the vehicle housing. The roller forms in particular a guide element of the lever arm. When a region of the vehicle housing is deformed by the collision, the roller thus rolls on or along the inside of the region. The rollers may be provided as rollers. This design allows a high or suitable sensitivity and detection accuracy of the touch sensor device.
In a further advantageous embodiment, the lever arm is designed as one piece/unitary piece.
In an alternative, further advantageous embodiment, the lever arm has a first lever arm element and a second lever arm element, wherein a first longitudinal end of the first lever arm element is supported on the inside of the region of the vehicle housing, and a second longitudinal end of the second lever arm element is mounted rotatably about the rotational axis at the angle sensor, wherein the second longitudinal end of the first lever arm element is connected in an articulated manner to the first longitudinal end of the second lever arm element, wherein in the mounted position the first lever arm element and the second lever arm element are arranged relative to one another at a predetermined lever angle which differs from 0 °, wherein the lever angle is preferably formed as an obtuse angle, wherein the lever angle is preferably selected in the range of 100 ° to 175 °, particularly preferably in the range of 120 ° to 150 °. The first longitudinal end of the first lever arm element is therefore supported directly or indirectly on the inside of the region of the vehicle housing, thus facing the vehicle outside and directly or indirectly on the inside of the region of the vehicle housing. The second longitudinal end of the second lever arm element is directly or indirectly rotatably fastened at the angle sensor. In this way, a particularly high or suitable sensitivity and detection accuracy of the touch sensor device can be ensured.
In a further advantageous embodiment, a predetermined angle of rest of other than 0 ° is formed between the second lever arm element and the angle sensor in the installed position, wherein the angle of rest is preferably formed as an acute angle, wherein the angle of rest is preferably selected in the range of 10 ° to 85 °, particularly preferably in the range of 30 ° to 45 °.
In a further advantageous embodiment, the contact sensor devices are arranged in a front region and/or a rear region and/or a side region and/or a floor region of the vehicle, wherein, when arranged in the front region and/or the rear region and/or the floor region, a plurality of contact sensor devices are preferably arranged distributed in the transverse direction of the vehicle. In this case, the plurality of contact sensor devices may be arranged in the front region in the vehicle transverse direction, in addition to the plurality of contact sensor devices may also be arranged in the rear region in the vehicle transverse direction, in addition to the plurality of contact sensor devices may also be arranged in the bottom region in the vehicle transverse direction. As an alternative, the plurality of contact sensor devices may also be arranged in the vehicle transverse direction only in the front region, only in the rear region or only in the bottom region. In the case of a contact sensor arrangement arranged in the front region and/or in the rear region, the contact sensor arrangement can advantageously be arranged in the front or rear bumper, wherein the first longitudinal end is preferably supported on the inside of the region of the bumper housing, and the support is preferably designed as a vehicle cross member or a section of a vehicle cross member. In the case of the arrangement in the side region, the contact sensor arrangement can advantageously be arranged in the side door, wherein the first longitudinal end is preferably supported on the inside of the region of the side door housing. In the case of the arrangement in the bottom region, the contact sensor arrangement can advantageously be arranged in the battery tray or in the underbody protection element, wherein the first longitudinal end is preferably supported on the inside of the region of the lower vehicle housing, in particular on the inside of the region of the underbody protection element.
The invention further relates to a vehicle having a contact detection system for activating a vehicle safety device according to the invention.
The advantages and various preferred embodiments described for the contact recognition system according to the invention are correspondingly applicable to the vehicle according to the invention.
Drawings
Embodiments of the present invention are explained in detail below with reference to the drawings. Wherein:
figure 1a shows a partial cross-sectional view of a vehicle with a contact identification system in an installed position,
Figure 1b shows a partial cross-sectional view of a vehicle with the contact recognition system according to figure 1a in a collision position,
Figure 2a shows a partial cross-sectional view of a vehicle with a contact identification system according to an alternative embodiment in an installed position,
Figure 2b shows a partial cross-sectional view of a vehicle with the contact recognition system according to figure 2a in a collision position,
Fig. 3a shows a partial cross-sectional view of a vehicle with a contact recognition system according to a further alternative embodiment in the installed position, and
Fig. 3b shows a partial cross-sectional view of a vehicle with the contact detection system according to fig. 3a in the collision position.
Detailed Description
The components corresponding to each other are given the same reference numerals throughout the figures.
Fig. 1a shows a partial cross-sectional view of a vehicle 1 with a contact detection system 2 for activating a safety device (not shown) of the vehicle 1, which is in an installed position, i.e. in a stationary state before a collision and thus before a deformation of the region of the vehicle housing 3 of the vehicle 1. The safety device comprises, for example, a front airbag for the driver of the vehicle. The contact recognition system 2 comprises an electronic control device (not shown), for example, which is provided as an airbag control device, and a contact sensor device 4, which is connected to the electronic control device and is provided as a rotation angle sensor device, for detecting a deformation of the region of the vehicle housing 3, which is caused after a collision of the vehicle 1.
The contact sensor device 4 is arranged in the front region of the vehicle 1 and has a lever arm 5 which is mounted rotatably and an angle sensor 7 which is fastened to a rigid support 6 of the vehicle 1, for detecting a rotation angle or a change in rotation angle of the lever arm 5 relative to the angle sensor 7, wherein the support 6 is, for example, a section of a body part of the vehicle 1. The contact sensor device 4 operates, for example, on the principle of magnetism, wherein the angle sensor 7 comprises a hall sensor and the lever arm 5 comprises a permanent magnet.
The first longitudinal end 5a of the lever arm 5 is supported directly on the inside of the region of the vehicle housing 3, which is provided, for example, as a bumper housing, and thus faces the vehicle outside, and is supported directly on the inside of the region of the vehicle housing 3, and is also elastically preloaded on the inside of the region of the vehicle housing 3 by the preload of a spring (not shown). The second longitudinal end 5b of the lever arm 5 is rotatably fixed to the angle sensor 7 about a rotation axis 8. In the illustrated installation position, a rotation angle α of 30 ° for example, which is designed as a resting angle, is present between the lever arm 5 and the angle sensor 7.
Fig. 1b shows a partial cross-sectional view of a vehicle with a contact detection system 2 according to fig. 1a in a collision position (i.e. after a collision of a region of the vehicle housing 3 and a deformation thereof), wherein the direction of the collision force is denoted by F and the position of the respective component or its pre-collision, i.e. mounting position, is denoted by dashed lines.
The collision of the front region of the vehicle 1 causes the deformation of the corresponding region of the vehicle housing 3, the deformation of the region of the vehicle housing 3 being indicated by a solid line compared to the initial position of the region of the vehicle housing 3 indicated by a broken line. By this deformation, the lever arm 5 undergoes a rotational or rotational movement from the installation position into the impact position, the angle of which corresponds to the degree of deformation or deformation, for example by 15 ° about the axis of rotation 8, which in turn is shown by the solid line of the lever arm 5 in comparison to the initial position of the lever arm 5 indicated by the dashed line. The rotational or swiveling operation of the lever arm 5 results in a change of the relative position or swivel angle α between the lever arm 5 and the angle sensor 7 to, for example, 45 °, which change can be detected by the angle sensor 7 and can identify whether there is a collision based on the detected change of the swivel angle α. For this purpose, for example, the change in the angle of rotation α is compared with a predetermined threshold value, wherein a collision can be detected only if the change in the angle of rotation α exceeds the predetermined threshold value.
By means of this embodiment of the contact sensor device 4 and of the contact recognition system 2, a contact recognition system 2 of simple design or of the contact sensor device 4 of simple design is provided, which in this case can detect collisions, in particular collisions with low collision energy, very reliably and can achieve the highest possible variability in different installation spaces and/or installation positions.
Fig. 2a and 2b show partial cross-sectional views of a vehicle 1 with a contact detection system 2 according to an alternative embodiment, wherein fig. 2a shows the installed position and fig. 2b shows the collision position. The vehicle 1 and the contact recognition system 2 essentially correspond to the vehicle 1 and the contact recognition system 2 shown in fig. 1a and 1b, wherein a roller 10 is provided at a first longitudinal end 5a of a lever arm 5 of the contact sensor device 4, which roller is rotatably mounted about a roller rotation axis 9. The roller 10 is supported here on the inside of the region of the vehicle housing 3, which is located directly on the inside of the region of the vehicle housing 3. The roller 10 constitutes a guide element for the lever arm 5. In the installed position shown in fig. 2a, a rotation angle α of 30 ° for example, which is designed as a resting angle, is present between the lever arm 5 and the angle sensor 7. If the area of the vehicle housing 3 is deformed by the collision, the roller 10 rolls on or along the inside of the area. In the crash position shown in fig. 2b, a rotation angle α of, for example, 45 ° is present between the lever arm 5 and the angle sensor 7. Based on the detected change in the rotation angle α, whether there is a collision can be recognized in turn. This design further provides the touch sensor device 4 with a high or suitable sensitivity and detection accuracy.
Fig. 3a and 3b show partial cross-sectional views of a vehicle 1 with a contact detection system 2 according to a further alternative embodiment, wherein fig. 3a shows the installed position and fig. 3b shows the collision position. The vehicle 1 and the contact detection system 2 essentially correspond to the vehicle 1 and the contact detection system 2 shown in fig. 1a and 1b, wherein the lever arm 5 has a first lever arm element 11 and a second lever arm element 12.
The first longitudinal end 5a of the first lever arm element 11 is indirectly supported on the inside of the region of the vehicle housing 3. For this purpose, the first longitudinal end 5a is fastened rotatably about a fastening shaft 13 to a rigid fastening element 14 mounted on the inside of the region of the vehicle housing 3. The second longitudinal end 5b of the second lever arm element 12 is mounted rotatably about the rotational axis 8 on the angle sensor 7, wherein the second longitudinal end 15 of the first lever arm element 11 is connected in an articulated manner to the first longitudinal end 16 of the second lever arm element 12, wherein in the mounted position shown in fig. 3a the first lever arm element 11 and the second lever arm element 12 are arranged at a lever angle of 135 ° relative to each other. In addition, in the installed position shown in fig. 3a, a rotation angle α of, for example, 35 ° is present between the lever arm 5 or, more precisely, between the second lever arm element 12 and the angle sensor 7, which is configured as a resting angle. In the crash position shown in fig. 3b, a rotational angle α of, for example, 50 ° is present between the lever arm 5, or rather the second lever arm element 12, and the angle sensor 7, as a result of the rotational and rotational movements of the lever arm 5, i.e. the first lever arm element 11 and the second lever arm element 12, caused by the crash. From this detected change in the angle of rotation α, it is in turn possible to infer whether there is a collision. By means of this embodiment, a particularly high or suitable sensitivity and detection accuracy of the touch sensor device can be ensured.
Claims (10)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102023209325.1A DE102023209325A1 (en) | 2023-09-25 | 2023-09-25 | Contact detection system in a vehicle for activating a safety device |
| DE102023209325.1 | 2023-09-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN119687775A true CN119687775A (en) | 2025-03-25 |
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ID=94875874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202411314682.3A Pending CN119687775A (en) | 2023-09-25 | 2024-09-20 | Activating the contact recognition system for safety equipment in the vehicle |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN119687775A (en) |
| DE (1) | DE102023209325A1 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202009008753U1 (en) * | 2009-06-24 | 2010-11-11 | Peguform Gmbh | Safety system for a motor vehicle |
| DE102014224248B4 (en) * | 2014-11-27 | 2022-09-22 | Continental Automotive Technologies GmbH | Force transmission element for an impact sensor for a motor vehicle |
-
2023
- 2023-09-25 DE DE102023209325.1A patent/DE102023209325A1/en active Pending
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2024
- 2024-09-20 CN CN202411314682.3A patent/CN119687775A/en active Pending
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| Publication number | Publication date |
|---|---|
| DE102023209325A1 (en) | 2025-03-27 |
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