CN115946639A - Method for occupant protection and occupant protection system - Google Patents
Method for occupant protection and occupant protection system Download PDFInfo
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- CN115946639A CN115946639A CN202310117661.1A CN202310117661A CN115946639A CN 115946639 A CN115946639 A CN 115946639A CN 202310117661 A CN202310117661 A CN 202310117661A CN 115946639 A CN115946639 A CN 115946639A
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Abstract
The invention relates to a method for occupant protection of a vehicle (100), wherein the method comprises the following method steps: s1: determining a chest injury level of the occupant (P) in the event of a crash of the vehicle (100) on the basis of an evaluation variable (W), wherein the evaluation variable (W) comprises at least the belt pressure and/or the belt pressure rate of change at the chest of the occupant; s2: and adjusting the belt force limit threshold (F) according to the obtained damage degree. The invention also relates to a corresponding occupant protection system (1) for a vehicle (100) and to a corresponding vehicle (100). By means of certain embodiments of the invention, it is possible to evaluate the chest injury of the occupant in real time in the event of a vehicle collision and to adjust the force limiting threshold rapidly as a function thereof, thereby avoiding further injuries to the occupant.
Description
Technical Field
The invention relates to a method for occupant protection, an occupant protection system and a vehicle having such an occupant protection system.
Background
Safety is one of the important properties of automobiles. In order to ensure the safety of automobiles, various safety technologies have been developed, such as passive safety technologies including safety belts and airbags, and active safety technologies including lane departure, collision warning, and traction control.
In the related art, a seat belt is rapidly tightened when a vehicle collision occurs, thereby protecting an occupant from serious injury. However, the impact force at the time of collision is too large, and the occupant chest may be damaged by tightening the seat belt. At this time, if the same seatbelt restraint threshold is maintained, secondary injury to the chest of the occupant may result. Also, due to individual differences between various occupant types, such as different ages, sexes, and physical conditions (children, the elderly, pregnant women, etc.), the preset seat belt force limit thresholds do not match, thus causing injuries. There is therefore a need to improve the prior art belt force limiting devices to adapt them to different situations in the event of a crash, in order to avoid serious injuries to the occupant.
Disclosure of Invention
It is an object of the present invention to provide an improved method for occupant protection, an improved occupant protection system and a vehicle having such an improved occupant protection system, which solve at least some of the problems of the prior art.
According to a first aspect of the invention, a method for occupant protection of a vehicle is provided, wherein the method comprises the following method steps:
s1: determining the chest injury degree of the passenger based on an evaluation parameter when the vehicle is in collision, wherein the evaluation parameter at least comprises the safety belt pressure and/or the safety belt pressure change rate at the chest of the passenger;
s2: and adjusting the safety belt force limit threshold according to the obtained damage degree.
This provides the advantage that the belt force threshold can be quickly lowered in the event of a detected chest injury of the occupant, while avoiding a secondary injury to the occupant's chest. Alternatively, in the case where it is detected that the chest of the occupant is not damaged, the seatbelt restraint threshold is raised, so that the occupant is more reliably immobilized to avoid damage.
According to an alternative embodiment of the invention, in step S2, the adjustment of the belt force threshold is performed by the squib device.
According to an alternative embodiment of the invention, said evaluating parameters further comprises: occupant vital sign information, vehicle speed, and/or vehicle acceleration.
According to an alternative embodiment of the invention, in step S1, the chest damage degree of the occupant is predicted based on the evaluation quantity before the chest damage of the occupant occurs.
According to an alternative embodiment of the invention, in step S1, the chest injury degree of the occupant is determined by a neural network algorithm using one or more of the evaluation parameters as input quantities.
According to an alternative embodiment of the invention, the method further comprises:
s01: obtaining sign information of a passenger in advance, wherein the sign information comprises height, weight, body type, sex, age and/or health state of the passenger;
s02: classifying the passengers according to the acquired sign information;
s03: the corresponding belt force limiting threshold is preset according to the type of the passenger.
In accordance with an alternative embodiment of the present invention,
the physical sign information of the known passenger is stored in advance; and/or
Detecting the physical sign information of the passengers through a sensor system; and/or
And manually inputting the physical sign information of the passenger.
According to an alternative embodiment of the invention, the current belt force limit threshold and/or the injury location and/or injury level of the occupant are indicated visually and/or audibly.
According to a second aspect of the invention, an occupant protection system for a vehicle is provided for carrying out the method according to the first aspect of the invention, wherein the occupant protection system comprises at least:
-at least one safety belt system comprising a safety belt and an adjustable safety belt force limiting device;
a sensor system which is provided and adapted to detect evaluation variables, for example, a belt pressure and/or a belt pressure rate of change at the chest of the occupant, the height, weight, body type, sex, age and/or state of health of the occupant, a vehicle speed and/or a vehicle acceleration; and
-an analysis and control unit arranged and adapted to determine a chest injury level of the occupant on the basis of the evaluation variable and to control the belt force limiting device to adjust a belt force limiting threshold value on the basis of the determined injury level.
According to an alternative embodiment of the invention, the sensor system comprises:
-a condition sensor, in particular a camera, arranged to be adapted to detect the height, size, sex, age and/or health status of the occupant and/or to perform face recognition on the occupant;
-a seat pressure sensor arranged and adapted to detect a pressure to which a vehicle seat is subjected;
-a belt pressure sensor arranged and adapted to detect a belt pressure and/or a belt pressure rate of change at the chest of the occupant;
-a speed sensor arranged and adapted to detect a vehicle speed;
-an acceleration sensor arranged and adapted to detect vehicle acceleration;
-a collision sensor arranged and adapted to identify a vehicle collision.
According to an alternative embodiment of the invention, the belt force limiting device comprises a force limiting lever having a constant intrinsic belt force limiting threshold, and
the safety belt force limiting device is also provided with a friction force limiting disc and/or a multi-stage cutting force limiting disc, and the friction force limiting disc and/or the multi-stage cutting force limiting disc are/is used for adjusting the safety belt force limiting threshold value.
According to an alternative embodiment of the invention, the belt force limiting device comprises an adjusting mechanism, the adjusting mechanism comprises a motor with a pinion and a rack cooperating with the pinion, wherein the action position of the rack and the friction force limiting disc and/or the multi-stage cutting force limiting disc is changed by driving the rack to move through the motor, so that the belt force limiting threshold is adjusted.
According to an alternative embodiment of the invention, the belt force limiter further comprises an igniter, in particular a micro gas generator, which can be triggered to quickly adjust the position of action with the friction force limiter and/or the multi-stage cutting force limiter in order to adjust the belt force limit threshold.
According to an alternative embodiment of the invention, the adjustment of the belt force threshold is done by the squib within 10ms after triggering of the squib.
According to a third aspect of the invention, a vehicle is provided, comprising an occupant protection system according to the second aspect of the invention, for implementing a method for occupant protection of a vehicle according to the first aspect of the invention.
According to a third aspect of the invention, a vehicle is provided, comprising an occupant protection system according to the second aspect of the invention, for implementing a method for occupant protection of a vehicle according to the first aspect of the invention.
By means of certain embodiments of the invention, it is possible to evaluate the chest injury of the occupant in real time in the event of a vehicle collision and to adjust the force limiting threshold rapidly as a function thereof, thereby avoiding further injuries to the occupant.
Drawings
The principles, features and advantages of the present invention may be better understood by describing the invention in more detail below with reference to the accompanying drawings. The drawings comprise:
fig. 1 schematically shows a system block diagram of an occupant protection system 1 for a vehicle 100 according to the invention.
Fig. 2 shows a schematic view at one vehicle seat in a vehicle 100 according to the invention, on which seat an occupant P is located.
Fig. 3 shows a schematic view of the belt force limiting device 12 of the occupant protection system 1 according to the invention.
Fig. 4 schematically shows a flow chart of a method for occupant protection of a vehicle 100 according to the invention.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
In order to make the technical problems, technical solutions and advantageous effects of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and exemplary embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of the invention.
Fig. 1 shows a schematic illustration of a vehicle 100 according to the invention in a vehicle seat, on which an occupant P is located. Fig. 2 schematically shows a system block diagram of an occupant protection system 1 for a vehicle 100 according to the invention.
As shown in fig. 1 and 2, the occupant protection system 1 according to the present invention includes a seat belt system 10, a sensor system 20, and an analysis and control unit 30. The safety belt system comprises a safety belt 11 and an adjustable safety belt force limiter 12. As can also be seen from fig. 1, the sensor system 20 comprises a vital sign sensor 21, in particular a camera, which is arranged at a location of the vehicle 100 suitable for sensing an occupant P within the vehicle, for example in the head space (see fig. 2). Here, the condition sensor 21 is arranged to be adapted to detect the height, size, sex, age and/or health status of the occupant. Additionally, the vital signs sensor 21 is also arranged to be adapted for face recognition of the occupant. The sensor system 20 further comprises a seat pressure sensor 22 (see fig. 2) arranged in the seat, which is arranged to be adapted to detecting the pressure to which the vehicle seat is subjected, whereby it is possible to detect, for example, the weight of an occupant P located in the seat. Furthermore, the sensor system 20 comprises a belt pressure sensor 23 arranged and adapted to detect a belt pressure and/or a belt pressure rate of change at the chest of the occupant. As shown in fig. 2, this seatbelt pressure sensor 23 is disposed on the seatbelt 11, particularly at the chest of the occupant P in the use state. The belt pressure sensor 23 is preferably a flexible diaphragm pressure sensor, which is arranged, for example, in a multipoint manner on the belt 11. Thereby, the pressure change curve at the chest of the occupant can be detected in real time. As also shown in fig. 1, the sensor system 20 also includes a speed sensor 24 for detecting a vehicle speed, an acceleration sensor 25 for detecting a vehicle acceleration, and a crash sensor 26 for recognizing a vehicle crash.
According to a preferred embodiment of the invention, the analysis and control unit 30 is arranged and adapted to classify the occupant P on the basis of information on physical signs of the occupant P, such as the height, weight, body type, sex, age and/or state of health of the occupant P, and to control the belt force limiting device 12 to preset a suitable belt force limiting threshold F on the basis of the determined occupant class. Further, the analysis and control unit 30 is arranged for determining a chest injury degree of the occupant on the basis of the evaluation variable W and for controlling the belt force limiter 12 to instantaneously adjust the belt force limit threshold F on the basis of the determined injury degree. The evaluation variable W includes, for example, the belt pressure at the chest of the occupant, the rate of change of the belt pressure, the height, weight, body type, sex, age and/or state of health of the occupant P, the vehicle speed and/or the vehicle acceleration.
In particular, in the seatbelt system of the present invention, a memory is further provided in which correspondence between the seatbelt pressure at the chest portion of the occupant and the rate of change in the seatbelt pressure and the degree of injury to the chest portion of the occupant are stored. The correspondence between the belt pressure and the rate of change of the belt pressure at the chest of the occupant and the degree of injury to the chest of the occupant is obtained here by a large amount of crash test data, for example by training a neural network. When the vehicle is in collision, one or more of the evaluation parameters W are used as input quantities to calculate the chest damage degree of the passenger P through a neural network algorithm.
Optionally, the occupant protection system 1 further comprises a display device and/or a broadcast device for displaying and/or broadcasting the current belt force limit threshold F and/or the injury location and/or injury level of the occupant P.
Optionally, the occupant protection system 1 further includes a transmission device for transmitting damage information, accident occurrence position, vehicle information, and/or the like of the occupant P to the rescue authority.
Fig. 3 shows a schematic illustration of a belt force limiter 12 of the occupant protection system 1 according to the invention. As shown in fig. 3, the belt force limiter 12 comprises a force limiting lever 121 having a constant intrinsic belt force limiting threshold F 0 . Furthermore, the belt force limiter 12 has a friction force limiter 122 and a multi-step cutting force limiter 123. The friction limiting disk 122 and the multi-stage cutting limiting disk 123 enable a constant intrinsic safety belt limiting force threshold F of the limiting rod 121 0 Additionally the belt force threshold F is changed. For example, by adjusting the engagement position or force with the friction disc 122, the additional friction provided by the friction disc 122 can be adjusted, thereby changing the belt threshold F. As another example, the seat belt force threshold F can be changed stepwise by adjusting the cutting position or the number of cutting layers (here, for example, up to three layers) of the multistage cutting force limiting disk 123.
In an advantageous embodiment of the invention, as shown in fig. 3, the belt force limiter 12 comprises an adjusting mechanism 124, which comprises a motor 1241 with a pinion and a toothed rack 1242 interacting with the pinion. In this case, the evaluation and control unit 30 can control the motor 1241 to move the gear rack 1242, thereby changing the position of the gear rack 1242 with respect to the friction force disc 122 and/or the multi-step cutting force disc 123. In this way, the desired belt force threshold F can be set flexibly.
In particular, an appropriate belt force threshold F can be set in advance by the adjusting mechanism 124 on the basis of previously measured occupant vital sign data, such as the height, weight, body type, sex, age and/or state of health of the occupant P.
In an advantageous embodiment of the invention, it can also be seen from fig. 3 that the belt force limiter 12 also comprises an explosion device 125. The detonation device is in particular a micro gas generator. In the event of a crash and a rapid adjustment of the belt force threshold F is desired, the evaluation and control unit 30 can trigger the squib device 125, as a result of which the desired position of action with the friction force disc 122 and/or the multi-step cutting force disc 123 is reached rapidly. As is shown in fig. 3 by way of example, a bursting device 125 is provided here for the friction limiting disk 122 and the multistage cutting limiting disk 123, respectively. However, it is alternatively also conceivable to provide in each case more point detonation devices 125, so that different end positions of action can be achieved, as desired, in order to achieve different belt limiting force levels. Preferably, the adjustment of the belt force threshold F can be done by the squib device 125 within 10ms after triggering of the squib device 125.
Fig. 4 schematically shows a flowchart of a method according to the invention for occupant protection of a vehicle 100.
According to the invention, the method comprises the following steps:
s01: the physical sign information of the passenger P is obtained in advance, and the physical sign information comprises the height, the weight, the body type, the sex, the age and/or the health state of the passenger P. The vital sign information can be stored vital sign information of the known occupant P, which is automatically called up when the known occupant P is recognized, for example, by face recognition. Alternatively, the vital sign information of the occupant P is detected in real time by a sensor system and/or manually entered by an input device.
S02: and classifying the passenger P according to the acquired physical sign information. For example, children, young adults, old people, men, women, or pregnant women, etc.
S03: the corresponding belt force limiting threshold F is preset according to the occupant category. In this case, for example, a lower safety belt force threshold F is set for the vulnerable group, for example, children, the elderly, pregnant women, etc. Alternatively, a higher belt force threshold F may be set, for example, for a heavier person.
S1: the chest damage degree of the occupant P is determined instantaneously in the event of a crash of the vehicle 100 on the basis of the evaluation variable W, wherein the evaluation variable W comprises at least the belt pressure and/or the belt pressure rate of change at the chest of the occupant. Additionally, the evaluation variable W may also include information on the physical signs of the occupant P, the vehicle speed and/or the vehicle acceleration, etc. In particular, the chest damage degree of the occupant P is predicted based on the evaluation parameter W before the chest damage of the occupant P occurs.
S2: and adjusting the safety belt force limiting threshold F instantaneously according to the obtained damage degree. In this case, for example, in the event of a chest injury of the occupant P being detected or predicted, the belt threshold force F is momentarily lowered, thereby avoiding further injuries. Alternatively, in the event that no chest injury of the occupant P is detected or predicted, in particular in the event that the belt threshold F is insufficient, for example due to too high vehicle speed and/or acceleration, the belt threshold F is raised, thereby providing a reliable hold for the occupant P.
In the drawings, the size of each component, the thickness of a layer, or a region may be exaggerated for clarity. Accordingly, the shapes and sizes of each of the elements in the drawings are not to be considered true scale.
Further, in describing representative embodiments, the specification may have presented the method and/or process as a particular sequence of steps. However, to the extent that the method or process does not rely on the particular order of steps set forth herein, the method or process should not be limited to the particular sequence of steps described. Other sequences of steps are possible as will be appreciated by those of ordinary skill in the art. Therefore, the particular order of the steps set forth in the specification should not be construed as limitations on the claims. Further, the claims directed to the method and/or process should not be limited to the performance of their steps in the order written, and one skilled in the art can readily appreciate that the sequences may be varied and still remain within the spirit and scope of the embodiments of the present application.
Although specific embodiments of the invention have been described herein in detail, they have been presented for purposes of illustration only and are not to be construed as limiting the scope of the invention. Various substitutions, alterations, and modifications may be devised without departing from the spirit and scope of the present invention.
Claims (15)
1. A method for occupant protection of a vehicle (100), wherein the method comprises the following method steps:
s1: determining a chest injury level of the occupant (P) in the event of a crash of the vehicle (100) on the basis of an evaluation variable (W), wherein the evaluation variable (W) comprises at least the belt pressure and/or the belt pressure rate of change at the chest of the occupant;
s2: and adjusting the belt force limit threshold (F) according to the obtained damage degree.
2. The method of claim 1, wherein,
in step S2, the belt force threshold (F) is adjusted by the squib device (125).
3. The method of claim 1 or 2,
the evaluation variable (W) further comprises: physical sign information of the occupant (P), vehicle speed and/or vehicle acceleration.
4. The method of any one of the preceding claims,
in step S1, the chest damage degree of the occupant (P) is predicted based on the evaluation parameter (W) before chest damage occurs to the occupant (P).
5. The method of any one of the preceding claims,
in step S1, the chest injury degree of the passenger (P) is obtained through a neural network algorithm by using one or more of the evaluation parameters (W) as input quantities.
6. The method according to any one of the preceding claims, wherein the method further comprises:
s01: obtaining sign information of the passenger (P) in advance, wherein the sign information comprises height, weight, body type, sex, age and/or health state of the passenger (P);
s02: classifying the passenger (P) according to the acquired sign information;
s03: a corresponding belt force limiting threshold (F) is preset according to the type of the passenger.
7. The method of claim 6, wherein,
the vital sign information of the known occupant (P) is stored in advance; and/or
Detecting, by a sensor system, physical sign information of an occupant (P); and/or
The physical sign information of the passenger (P) is manually entered.
8. Method according to any of the preceding claims, wherein the current belt force limit threshold (F) and/or the injury location and/or the injury degree of the occupant (P) is indicated visually and/or acoustically.
9. An occupant protection system (1) for a vehicle (100) for implementing a method according to any one of the preceding claims 1 to 10, wherein the occupant protection system (1) comprises at least:
-at least one safety belt system (10) comprising a safety belt (11) and an adjustable safety belt force limiting device (12);
-a sensor system (20), the sensor system (20) being arranged and adapted to detect evaluation parameters (W) including, for example, a belt pressure at the chest of the occupant, a belt pressure rate of change, a height, a weight, a size, a gender, an age and/or a state of health of the occupant (P), a vehicle speed and/or a vehicle acceleration; and
-an analysis and control unit (30), the analysis and control unit (30) being arranged and adapted to determine a degree of chest injury of the occupant on the basis of the evaluation variable (W) and to control the belt force limiting device (12) to adjust a belt force limiting threshold (F) on the basis of the determined degree of injury.
10. The occupant protection system (1) according to claim 9, wherein the sensor system (20) comprises:
-a vital signs sensor (21), in particular a camera, said vital signs sensor (21) being arranged to be adapted to detect the height, size, sex, age and/or health status of the occupant and/or to perform face recognition on the occupant;
-a seat pressure sensor (22) arranged to be adapted to detect a pressure to which a vehicle seat is subjected;
-a belt pressure sensor (23) arranged and adapted to detect a belt pressure and/or a belt pressure rate of change at the chest of the occupant;
-a speed sensor (24) arranged to be adapted to detecting a vehicle speed;
-an acceleration sensor (25) arranged to be adapted to detecting vehicle acceleration;
-a collision sensor (26) arranged to be adapted to recognize a vehicle collision.
11. The occupant protection system (1) according to claim 9 or 10,
the belt force limiting device (12) comprises a force limiting lever (121) having a constant intrinsic belt force limiting threshold (F) 0 ) And is and
the belt force limiter (12) also has a friction force limiter disc (122) and/or a multi-stage cutting force limiter disc (123) for adjusting a belt force limit threshold (F).
12. The occupant protection system (1) according to claim 11,
the safety belt force limiting device (12) comprises an adjusting mechanism (124) which comprises a motor (1241) with a pinion and a rack (1242) which is matched with the pinion, wherein the action position of the rack (1242) with the friction force limiting disc (122) and/or the multi-stage cutting force limiting disc (123) is changed by driving the rack (1242) to move through the motor (1241), so that the safety belt force limiting threshold value (F) is adjusted.
13. The occupant protection system (1) according to claim 11 or 12,
the safety belt force limiter (12) further comprises an igniter (125), in particular a micro gas generator, which can be triggered to quickly adjust the position of action with the friction force limiter (122) and/or the multi-stage cutting force limiter (123) in order to adjust the safety belt force limit threshold (F).
14. The occupant protection system (1) according to claim 13,
the adjustment of the belt force threshold (F) is carried out by the squib device (125) within 10ms after the triggering of the squib device (125).
15. A vehicle (100), the vehicle (100) comprising an occupant protection system (1) according to any one of claims 9 to 14 for implementing a method for occupant protection of a vehicle (100) according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310117661.1A CN115946639A (en) | 2023-02-02 | 2023-02-02 | Method for occupant protection and occupant protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310117661.1A CN115946639A (en) | 2023-02-02 | 2023-02-02 | Method for occupant protection and occupant protection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115946639A true CN115946639A (en) | 2023-04-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310117661.1A Pending CN115946639A (en) | 2023-02-02 | 2023-02-02 | Method for occupant protection and occupant protection system |
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| Country | Link |
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| CN (1) | CN115946639A (en) |
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- 2023-02-02 CN CN202310117661.1A patent/CN115946639A/en active Pending
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