CN111415437A - Collision event recording system and method - Google Patents
Collision event recording system and method Download PDFInfo
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- CN111415437A CN111415437A CN202010227736.8A CN202010227736A CN111415437A CN 111415437 A CN111415437 A CN 111415437A CN 202010227736 A CN202010227736 A CN 202010227736A CN 111415437 A CN111415437 A CN 111415437A
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- G07C5/00—Registering or indicating the working of vehicles
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Abstract
The present invention relates to a collision event recording system and a collision event recording method. The crash event recording system is connected to an airbag controller, comprising: a memory storing crash data for a plurality of crash events; a collision event damage value determination section that determines a damage value of each collision event on the basis of an acceleration signal of each collision event received by the airbag controller from the vehicle collision sensor at the time of a collision; and a collision event data recording unit for recording collision data of each collision event in the memory after a collision occurs, and when collision data of a plurality of collision events needs to be recorded simultaneously, the collision data of each collision event collected by the airbag controller is recorded in the memory in order of the injury value of each collision event from high to low.
Description
Technical Field
The invention relates to the technical field of automobile passive safety, in particular to a collision event recording system and a collision event recording method.
Background
With the popularization of vehicles, more and more traffic accidents occur in daily life, and the safety of traffic and automobiles is increasingly paid attention by people. When a vehicle is in collision, data related to the collision event is usually recorded in an airbag controller for analysis of the cause of the accident and the like after the accident, which is important for improving passive safety of the automobile and avoiding the accident.
However, in the case of recording data relating to a crash event in an airbag controller, battery power may be cut off when a crash occurs, and the recording of crash event data relies primarily on capacitance, so the recording time is affected by the magnitude of the capacitance. Moreover, when collision happens, the system is always the busiest, if the capacitor stops supplying power, the collision event data can be recorded incompletely, and if the principle of first occurrence and first storage is adopted, unimportant events and data can be recorded preferentially; if the principle of fixed priority is adopted, the data with lower event correlation degree can be recorded preferentially.
Disclosure of Invention
The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a collision event recording system and method for recording collision data of a plurality of collision events according to a damage value and a priority of the collision event when a collision occurs by determining a severity (damage value) of the collision event and setting a priority to each classified collision data of the collision event according to a collision type of the collision event.
According to one aspect of the present invention, there is provided an impact event recording system connected to an airbag controller, comprising: a memory for storing crash data for a plurality of crash events; a collision event damage value determination section that determines a damage value of each of the collision events based on an acceleration signal of each of the collision events received by the airbag controller from a vehicle collision sensor at the time of a collision; and a collision event data recording unit that records collision data of each of the collision events in the memory after a collision occurs, and when the collision data of a plurality of the collision events needs to be recorded simultaneously, sequentially records the collision data of each of the collision events collected by the airbag controller in the memory in order of the injury value of each of the collision events from high to low.
Preferably, the collision data of each of the collision events includes class 1 to class N collision data divided based on a function of collision data and a collection time, respectively.
Preferably, the crash event recording system further comprises: a collision type acquisition portion that acquires, at the time of a collision, a collision type of each of the collision events from the airbag controller.
Preferably, the crash event recording system further comprises: a classification collision data priority table in which priorities of the 1 st to nth classification collision data corresponding to the collision types are preset, wherein the collision event data recording portion acquires the priorities of the 1 st to nth classification collision data from the classification collision data priority table according to the collision types of the collision events acquired by the collision type acquiring portion when recording the 1 st to nth classification collision data of each collision event, and sequentially records the 1 st to nth classification collision data of the collision event in the memory in order of the priorities from high to low.
Preferably, the collision event damage value determination section determines the damage value taking into account the collision type of the collision event acquired by the collision type acquisition section when determining the damage value of the collision event.
Preferably, the collision event damage value determination unit increases the damage value as the acceleration signal received from the vehicle collision sensor increases.
Preferably, in the priority table of the classified crash data, the ith classified crash data having a higher correlation with the crash event among the 1 st to nth classified crash data is set as a higher priority, where i is greater than or equal to 1 and less than or equal to N, and is an integer.
Preferably, the collision types include: front/rear collisions, side collisions, and rollover collisions.
According to another aspect of the present invention, there is provided a collision event recording method, comprising the steps of: a crash event damage value determination step of determining a damage value of each crash event based on an acceleration signal of each crash event received by an airbag controller from a vehicle crash sensor at the time of a crash; and a collision event data recording step of recording collision data of each of the collision events in a memory after a collision occurs, and when the collision data of a plurality of the collision events needs to be recorded simultaneously, sequentially recording the collision data of each of the collision events collected by the airbag controller in the memory in order of the injury value of each of the collision events from high to low.
Preferably, in the collision event recording method, the collision data of each of the collision events includes the 1 st to nth classification collision data classified based on a function of the collision data and a collection time, respectively.
Preferably, the collision event recording method further comprises the steps of: a collision type acquisition step of acquiring a collision type of each of the collision events from the airbag controller before the collision event data recording step.
Preferably, in the collision event data recording step, when the 1 st to nth classification collision data of each collision event are recorded, the priorities of the 1 st to nth classification collision data are obtained from a classification collision data priority table according to the collision type of the collision event acquired in the collision type acquiring step, and the 1 st to nth classification collision data of the collision event are sequentially recorded in the memory in the order of the priorities from high to low, where the classification collision data priority table is a table in which the priorities of the 1 st to nth classification collision data corresponding to the collision type are preset.
According to the invention, the most important collision event data can be recorded preferentially, and the unimportant collision event data can be recorded finally, so that the data with higher correlation can be recorded preferentially, the efficiency of recording the collision event data is improved, and the accident analysis after the accident is facilitated.
Drawings
Fig. 1 is a block diagram showing a configuration of a collision event recording system according to an embodiment of the present invention.
FIG. 2 is an example of a sorted crash data priority table in accordance with an embodiment of the present invention.
Fig. 3 is a recording sequence matrix diagram in which the crash event recording system according to the embodiment of the present invention records crash data of two crash events when the two crash events occur consecutively in a short time interval.
Fig. 4 is a flowchart showing a collision event recording method according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the related invention are shown in the drawings.
Fig. 1 is a block diagram showing a configuration of a collision event recording system 200 according to an embodiment of the present invention. As shown in fig. 1, in the present embodiment, the collision event recording system 200 includes a collision type acquisition portion 201, a collision event injury value determination portion 202, a classified collision data priority table 203, a collision event data recording portion 204, and a memory 205 for storing collision data of a plurality of collision events, and the collision event recording system 200 is connected to an Airbag Controller (ACU) 100.
The airbag controller 100 is connected to the vehicle collision sensor 12, the brake controller 13, the engine controller 14, and the steering system controller 15 through a bus, and receives various vehicle data from the vehicle collision sensor 12, the brake controller 13, the engine controller 14, and the steering system controller 15. When a vehicle collision occurs, the airbag controller 100 determines what type of collision the collision occurred is based on various acceleration signals acquired from the vehicle collision sensor 12. The collision types include a front/rear collision, a side collision, a rollover collision, and the like.
When a vehicle collides, the collision type acquisition portion 201 of the collision event recording system 200 acquires the collision type of the collision event determined by the airbag controller 100 from the airbag controller 100, and transmits the acquired collision type of the collision event to the collision event damage value determination portion 202. Meanwhile, the collision event damage value determination portion 202 of the collision event recording system 200 acquires various acceleration signals related to the collision event, which are transmitted to the airbag controller 100 by the vehicle collision sensor 12, from the airbag controller 100, and the collision event damage value determination portion 202 determines the damage value of the collision event based on the various acceleration signals and the collision type of the collision event acquired by the collision type acquisition portion 201.
The damage value may be set to, for example, four levels of 1 to 4, and a larger value (level) of the damage value indicates a greater severity of the collision event. Three thresholds may be preset correspondingly for determining which of the above-mentioned levels the damage value belongs to. For example, when the airbag controller determines that a forward collision has occurred, the injury value of the forward collision event is set based on the magnitude of the corresponding acceleration signal. If the corresponding acceleration signal is less than a predetermined first threshold, the damage value of the forward collision event is 1; if the corresponding acceleration signal is greater than or equal to a predetermined first threshold value and less than a second threshold value, the damage value of the forward collision event is 2; if the corresponding acceleration signal is greater than or equal to a predetermined second threshold and less than a third threshold, the damage value of the forward collision event is 3; if the corresponding acceleration signal is greater than or equal to a predetermined third threshold, the injury value for the forward collision event is 4. The manner used herein to determine the injury value is merely an example and the present invention is not limited thereto.
For other types of collisions, the damage value may be set in the same manner, the threshold value used for determination may be freely set according to test data or the like, and different threshold values may be set for each collision type.
When a vehicle collides, the collected collision data of the collision event, which is classified into the 1 st to the nth classification collision data in this embodiment, has been classified based on the function of the collision data and the collection timing by the airbag controller 100 before the collision data of the collision event is recorded to the memory 205.
Wherein the 1 st and 2 nd classification crash data are data relating to all crash types, the 3 rd and 4 th classification crash data are data relating to forward/backward crashes, the 5 th and 6 th classification crash data are data relating to lateral crashes, the 7 th classification crash data are data relating to rollover crashes, and the 8 th classification crash data are data relating to all crash types.
The classification crash data priority table 203 of the crash event recording system 200 is a table in which priorities of the 1 st to 8 th classification crash data corresponding to crash types are set in advance. Fig. 2 shows an example of a classification collision data priority table used by the present embodiment.
As shown in fig. 2, the classification collision data priority table 203 is provided with the priorities of the 1 st to 8 th classification collision data for each collision type. The priority is set to 1-8, and the larger the number is, the higher the priority is.
In the case of a forward/backward collision, the 1 st and 2 nd classification collision data are set to higher priorities of 8 and 7, respectively, for various data related to all types of collisions, including vehicle speed, braking state, and battery voltage. Since the 3 rd and 4 th classification crash data are data related to a forward/backward crash, the data are given priorities 6 and 5 respectively next to the 1 st and 2 nd classification crash data, and the 8 th classification crash data are data related to all crash types and have a priority 4. In the case of a forward/backward collision, the 5 th and 6 th classification collision data relating to a side collision and the 7 th classification collision data relating to a rollover collision are given lower priorities of 3, 2, and 1, respectively.
In the case of a side collision, similarly, the 1 st and 2 nd classification collision data are set to higher priorities of 8 and 7, respectively. Since the 5 th and 6 th classification collision data are data related to a side collision, the 5 th and 2 nd classification collision data are given priority levels of 6 and 5, respectively, next to the 1 st and 2 nd classification collision data, and the 8 th classification collision data are data related to all collision types, and the priority level of 4. In the case of a side collision, the 3 rd and 4 th classification collision data relating to a front/rear collision and the 7 th classification collision data relating to a rollover collision are given lower priorities, 3, 2, and 1, respectively.
In the case of a rollover collision, similarly, the 1 st and 2 nd classification collision data are set to high priorities of 8 and 7, respectively. Since the 7 th-class collision data is data related to a rollover collision, the data is given a priority next to the 1 st-class collision data and the 2 nd-class collision data, and the priority is set to 6. The 8 th classification collision data is also data related to all collision types, and the priority thereof is set to 5. In the case of a rollover collision, the 3 rd and 4 th classification collision data relating to a front/rear collision and the 5 th and 6 th classification collision data relating to a side collision are set to a lower priority, 4, 3, 2, and 1, respectively.
The collision event data recording section 204 of the collision event recording system 200 records a collision event after the collision occurs. When collision data of a plurality of collision events needs to be recorded at the same time, first, the collision event data recording unit 204 acquires the damage value of each collision event from the collision event damage value determination unit 202, and sequentially records collision data of each collision event, that is, the 1 st to 8 th classification collision data, in the memory 205 in the order of the acquired damage values of each collision event from high to low. When recording the 1 st to 8 th classification crash data of a certain crash event, the crash event data recording portion 204 acquires the priorities of the corresponding 1 st to 8 th classification crash data from the classification crash data priority table 203 according to the crash types of the respective crash events acquired from the crash type acquiring portion 201, and then sequentially records the 1 st to 8 th classification crash data of the crash event into the memory 205 in the order of the priorities from high to low.
An example of crash data recording when two crash events have occurred consecutively in a vehicle within a short time interval is described below. The short time interval described above is the time interval during which crash data for the first crash event is not recorded.
The first of the two crash events is a forward crash and the subsequent second crash event is a side crash as determined by the airbag controller 100. The collision type acquisition portion 201 of the collision event recording system 200 acquires the collision types of the above-described two collision events from the airbag controller 100, respectively.
Then, the collision event damage value determination section 202 acquires, from the airbag controller 100, various acceleration signals of the first collision event and various acceleration signals of the second collision event, which are transmitted to the airbag controller 100 by the vehicle collision sensor 12, respectively. In the present embodiment, the collision event damage value determination unit 202 further obtains the collision types of the first collision event and the second collision event from the collision type obtaining unit 201, respectively. Then, the impact event damage value determination portion 202 determines the damage value of the first impact event, here assumed to be 1, based on the acquired various acceleration signals of the first impact event and the impact type of the first impact event, and the impact event damage value determination portion 202 determines the damage value of the second impact event, here assumed to be 2, based on the acquired various acceleration signals of the second impact event and the impact type of the second impact event. Thus, in this example, the first impact event is a forward impact with an injury value of 1, and the second impact event is a side impact with an injury value of 2.
When recording collision data of the two collision events, the collision event data recording unit 204 of the collision event recording system 200 records the collision data in two levels, and as shown in the matrix of fig. 3, the first level is the recording order of a plurality of collision events shown in the horizontal direction in fig. 3, and records the collision events in the order of higher injury values. The second level is the order of recording of the category 1 crash data through the category 8 crash data in one crash event shown in the vertical direction in FIG. 3. In this example, the crash event data recording section 204 first records a second crash event (a side crash with a damage value of 2). Then, the priorities of the corresponding 1 st to 8 th classification crash data (the crash types are 8 lines of data of the side crash in fig. 2) are obtained from the classification crash data priority table 203 (fig. 2) according to this crash type of the side crash. Next, the collision event data recording unit 204 records the 1 st to 8 th classification collision data of the second collision event into the memory 205 in order of the priority from high to low, and then traverses the 1 st to 8 th classification collision data of the second collision event. If a particular classification of crash data is not collected, the next lower priority data can be moved to, and when the traversal is complete, the next injury value of the crash event can be moved to.
Next, a collision event recording method according to an embodiment of the present invention will be described with reference to fig. 4.
In step S1, the collision type acquisition portion 201 acquires the collision type of each collision event from the airbag controller 100.
In step S2, the collision event injury value determination section 202 determines the injury value for each collision event based on the various acceleration signals associated with that collision event acquired from the airbag controller and the collision type for that collision event determined in step S1.
In step S3, the collision event data recording unit 204 sequentially records the collision data (the 1 st to 8 th classification collision data) of each collision event into the memory in the order of the injury value of each collision event determined in step S2 from high to low, and when recording the 1 st to 8 th classification collision data of each collision event, acquires the priorities of the corresponding 1 st to 8 th classification collision data from the classification collision data priority table according to the collision type of the collision event acquired in step S1, and sequentially records the 1 st to 8 th classification collision data of the collision event into the memory in the order of the priorities from high to low.
Further, the crash event recording method according to the present embodiment determines the injury value taking into account the crash type of the crash event, and thus the step S1 is performed before the step S2, but the present invention is not limited thereto, and the injury value may be determined without taking into account the crash type of the crash event, in which case the step S1 may be performed after the step S2.
In addition, the damage value described in the embodiment of the present invention is set to four levels of 1 to 4, but the present invention is not limited to this, and a level of four or less levels or more levels may be set.
In the embodiment of the present invention, the collision data of the collision event is divided into the 1 st to 8 th classification collision data, but the present invention is not limited thereto, and the classification collision data may be divided as necessary, and the contents of the classification collision data are not limited to those listed in the above-described embodiment. Correspondingly, the priority table of the classified crash data shown in the present invention is only an example, and may be preset in the crash event recording system by the automobile manufacturer according to the number and content of the classified crash data.
In addition, the crash event recording system described in the present embodiment is independent of the airbag controller, but may be integrated as a module in the airbag controller.
Although the present invention has been described with reference to the present specific embodiments, it will be appreciated by those skilled in the art that the scope of the invention herein involved is not limited to the specific combination of the above features, but also encompasses other embodiments formed by any combination of the above features or their equivalents without departing from the inventive concept. For example, the above features and (but not limited to) features having similar functions disclosed in the present invention are mutually replaced to form the technical solution.
Claims (12)
1. An impact event recording system connected to an airbag controller, comprising:
a memory for storing crash data for a plurality of crash events;
a collision event damage value determination section that determines a damage value of each of the collision events based on an acceleration signal of each of the collision events received by the airbag controller from a vehicle collision sensor at the time of a collision; and
and a collision event data recording unit that records collision data of each of the collision events in the memory after a collision occurs, and when the collision data of a plurality of the collision events needs to be recorded simultaneously, sequentially records the collision data of each of the collision events collected by the airbag controller in the memory in order of the injury value of each of the collision events from high to low.
2. The crash event recording system of claim 1,
the collision data of each of the collision events respectively includes the 1 st to nth classification collision data classified based on a function of the collision data and a collection time.
3. The crash event recording system of claim 2, further comprising:
a collision type acquisition portion that acquires, at the time of a collision, a collision type of each of the collision events from the airbag controller.
4. The crash event recording system according to claim 3, further comprising:
a classification collision data priority table in which priorities of the 1 st to nth classification collision data corresponding to the collision types are preset,
when recording the 1 st to nth classification collision data of each collision event, the collision event data recording part acquires the priorities of the 1 st to nth classification collision data from the classification collision data priority table according to the collision type of the collision event acquired by the collision type acquiring part, and sequentially records the 1 st to nth classification collision data of the collision event into the memory in the order of the priorities from high to low.
5. The crash event recording system according to claim 3 or 4,
the collision event damage value determination section determines the damage value taking into account the collision type of the collision event acquired by the collision type acquisition section when determining the damage value of the collision event.
6. The crash event recording system according to any one of claims 1 to 4,
the collision event damage value determination unit may be configured to increase the damage value as the acceleration signal received from the vehicle collision sensor increases.
7. The crash event recording system of claim 4,
in the classification collision data priority table, the ith classification collision data, which is highly related to the collision event, among the 1 st to nth classification collision data is set as a higher priority, wherein i is greater than or equal to 1 and less than or equal to N, and is an integer.
8. The crash event recording system according to claim 3 or 4,
the collision types include: front/rear collisions, side collisions, and rollover collisions.
9. A method of crash event recording, comprising the steps of:
a crash event damage value determination step of determining a damage value of each crash event based on an acceleration signal of each crash event received by an airbag controller from a vehicle crash sensor at the time of a crash; and
and a collision event data recording step of recording collision data of each collision event in a memory after a collision occurs, and when the collision data of a plurality of collision events need to be recorded simultaneously, sequentially recording the collision data of each collision event collected by the airbag controller in the memory in the order of the injury value of each collision event from high to low.
10. The crash event recording method according to claim 9,
the collision data of each of the collision events respectively includes the 1 st to nth classification collision data classified based on a function of the collision data and a collection time.
11. The crash event recording method according to claim 10, further comprising the steps of:
a collision type acquisition step of acquiring a collision type of each of the collision events from the airbag controller before the collision event data recording step.
12. The crash event recording method according to claim 11,
in the collision event data recording step, when the 1 st to nth classification collision data of each collision event are recorded, the priorities of the 1 st to nth classification collision data are obtained from a classification collision data priority table according to the collision type of the collision event obtained in the collision type obtaining step, and the 1 st to nth classification collision data of the collision event are recorded in the memory in sequence from high to low in the priority,
wherein the classification collision data priority table is a table in which priorities of the 1 st to nth classification collision data corresponding to the collision types are set in advance.
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