JP3968671B2 - Airbag system for vehicles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air bag system for a vehicle, for example, an air bag system for an automobile as a typical vehicle.
[0002]
[Prior art]
In automobiles, which are typical vehicles, in recent years, so-called airbag systems that mitigate the impact on passengers in the event of an accident have been rapidly spreading due to the increased interest in safety of users.
[0003]
Conventionally, such an airbag system has been provided with an acceleration sensor as a sensor for detecting an impact applied to the vehicle, and is used for controlling the deployment timing of the airbag.
[0004]
In order to reproduce (verify) the state of the vehicle or the like when the airbag is activated or when an accident occurs, for example, in JP-A-1-164649, the acceleration is detected when the acceleration at which the airbag is activated is detected. Techniques for storing in a memory have been proposed. For example, Japanese Patent Laid-Open No. 5-270352 proposes a technique for measuring an elapsed time from when the detected acceleration becomes maximum and storing the maximum acceleration and the elapsed time in a memory. For example, Japanese Patent Application Laid-Open No. 7-277230 proposes a technique for storing the detected acceleration in a memory when the acceleration sensor detects that the vehicle is performing an abnormal behavior such as a sudden turn.
[0005]
[Problems to be solved by the invention]
The acceleration sensor is generally provided in front of the vehicle in order to quickly detect an impact applied to the vehicle. For this reason, for example, when the seating posture of the occupant changes due to an impact at the time of collision, or when the seat moves due to the impact, the magnitude of the acceleration actually applied to the occupant due to the impact and the acceleration detected by the acceleration sensor There is a possibility that the value does not match, which is an obstacle to accurately reproducing the state of the vehicle or the like.
[0006]
Therefore, an object of the present invention is to provide a vehicle airbag system that accurately detects an impact applied to a vehicle occupant and records the state of the impact.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the vehicle airbag system of the present invention is characterized by the following configuration.
[0008]
  That is,The vehicle airbag system according to the present invention includes:Forward direction added to the vehiclevehicleFirst detecting means for detecting acceleration;,Of the vehicleCrewForward applied toCrewSecond detection means for detecting acceleration;When the average value of the vehicle acceleration detected by the first detection means and the occupant acceleration detected by the second detection means is greater than a threshold value, airbag deployment control is performed. Control means for storing in a memory the occupant acceleration detected by the two detection means.It is characterized by that.
  According to another aspect of the present invention, there is provided a vehicle air bag system according to the present invention, wherein a first detection means for detecting a forward vehicle acceleration applied to the vehicle and a forward passenger acceleration applied to the vehicle occupant are detected. 2 and the occupant acceleration detected by the second detection means while performing airbag deployment control when the vehicle acceleration detected by the first detection means exceeds a first threshold value. And a control means for storing the data in a memory.
  This makes it possible to accurately detect the impact applied to passengers on the vehicle.Can be memorized and can respond to future accidents.
[0009]
In this case, as the predetermined condition, the magnitude relationship between the detection value by the first and / or second detection means and the predetermined value, the timing at which the control means deploys the airbag, or the like may be used. As a result, efficient use of the memory having a limited storage capacity and data recording effective for reproducing the impact state are realized.
[0010]
Further, for example, the second detection means is provided in the vicinity of a seating position of the occupant such as a lower part of the B pillar of the vehicle, a side sill, a floor panel, and an inside of a seat. As a result, the actual impact on the passenger is detected as accurately as possible.
[0011]
Preferably, the control means stores the value detected by the second detection means and the time when the predetermined condition is satisfied in the memory. Or it is good to memorize | store in the said memory the detection value by the said 2nd detection means in the predetermined time including the time when the said predetermined condition was met. Thereby, for example, it is used for situation reproduction (verification) when an accident occurs.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a vehicle airbag system according to the present invention is applied to an automobile as a typical vehicle, and will be described in detail with reference to the drawings.
[0013]
[First Embodiment]
First, the system configuration of the airbag system in the present embodiment will be described with reference to FIG.
[0014]
FIG. 1 is a system configuration diagram showing an outline of an airbag system as a first embodiment of the present invention.
[0015]
In the figure, output signals from various sensors described below are input to the control unit 11 of the airbag system in the present embodiment.
[0016]
The passenger seat inflator 16 deploys an airbag (not shown) stored in a dashboard in front of the passenger seat 13. The driver's seat inflator 17 deploys an airbag (not shown) stored in the steering wheel. A status display lamp 151 provided in the instrument panel 15 notifies the occupant of the current control status of the driver seat and passenger seat airbags by the control unit 11. A failure warning lamp 152 provided in the instrument panel 15 notifies the occupant of the failure state of the driver-side and passenger-side airbags.
[0017]
A second acceleration (hereinafter referred to as “G”) sensor 31 is a sensor that mainly detects a forward impact of the vehicle together with a first G sensor described later, and is provided in the passenger compartment to detect an impact applied to the passenger. (Details will be described later). The third G sensor 32 is a sensor that mainly detects a lateral impact of the vehicle, and is used to control a side airbag (not shown). A CCD (Charge Coupled Device) camera 33 photographs the presence / absence and posture of a passenger in the passenger compartment. The occupant detection sensor 34 detects the presence or absence of an occupant in the vehicle interior using ultrasonic waves or the like.
[0018]
Further, the driver's seat 21 includes a seat belt feed amount detection sensor 22 that detects a feed amount of the seat belt 27, a seat slide amount detection sensor 24 that detects a slide position of a slider mechanism 23 that slides the seat back and forth, and the seat. A reclining angle detection sensor 26 for detecting the reclining angle of the reclining mechanism 25 and a plurality of pressure sensors 35 for detecting the presence / absence of an occupant and the seating posture of the occupant are embedded. An output signal of the sensor is also input to the control unit 11. The sensor group provided in the driver seat 21 is also provided in the passenger seat 13 in the same manner, but is not shown in FIG. 1 for convenience of explanation.
[0019]
The seat sensor unit 18 communicates to the control unit 11 the presence / absence of an occupant on the passenger seat 13, the sitting posture of the occupant, and the wearing state of the child seat 12. FIG. 1 shows a state where the child seat 12 is attached to the passenger seat 13.
[0020]
Here, the state detection configuration of the passenger seat 13 in the present embodiment will be described with reference to FIGS. 9 and 10.
[0021]
FIG. 9 is a diagram for explaining the arrangement of the communication antennas in the passenger seat as the first embodiment of the present invention. FIG. 10 is a diagram showing a configuration of the child seat 12 as the first embodiment of the present invention. The seat sensor unit 18 includes a plurality of pressure sensors 35 that are embedded in the passenger seat 13 to detect whether a passenger is seated and the seating posture of the passenger, a reception antenna 131 and a transmission antenna embedded in the passenger seat 13. 132 is connected to perform radio communication with the transponder 121 provided in the child seat 12, convert a signal received by the receiving antenna 131 based on a predetermined format, and transmit the signal to the control unit 11.
[0022]
In the above-described airbag system, the configuration of the sensor that detects the seated state of the occupant (including the mounted state of the child seat) is merely an example, and the present invention can be applied to different configurations as necessary.
[0023]
Next, the device configuration of the control unit 11 will be described with reference to FIG.
[0024]
FIG. 2 is a block configuration diagram showing an outline of the control unit 11 as the first embodiment of the present invention.
[0025]
In the figure, the control unit 11 includes a first G sensor 11A, a power supply circuit 11B that stabilizes the DC voltage from the battery 36, an output control unit 11C that detonates the inflators 16 and 17 in accordance with a control signal output from the microcomputer 110, A monitoring unit 11D for monitoring the operation state of the control unit 11 and turning on / off the display lamps 151, 152, a time measuring unit 11E for measuring time, and a memory for recording data (details will be described later) output from the microcomputer 110. A unit 11F and a connector 11G to which an external device can be connected are provided.
[0026]
The connector 11G is connected to a data reading device 37 as an external device that reads data stored in the storage unit 11F as necessary. The storage unit 11F includes a readable / writable memory (not shown) that stores data output from the microcomputer 110. Since the information stored in the memory needs to be held in the memory even when the control unit 11 is stopped due to an impact due to its characteristics, the memory includes, for example, a nonvolatile memory such as a flash memory. Use memory or memory backed up by batteries.
[0027]
The microcomputer 110 includes a CPU 110A, a ROM 110B, and a RAM 110C. The CPU 110A controls the airbag system according to an airbag deployment control program stored in advance in the ROM 110B while using the RAM 110C as a temporary storage area and work area for various data.
[0028]
<Acceleration sensor mounting position>
Next, the mounting position of the acceleration sensor in the present embodiment will be described with reference to FIGS.
[0029]
7 and 8 are diagrams for explaining variations of the mounting position of the acceleration sensor as the first embodiment of the present invention. FIG. 7 shows the interior of the automobile, and FIG.
[0030]
As shown in FIG. 7, the control unit 11 provided with the first G sensor 11 </ b> A is provided inside the front panel 54 in the passenger compartment and behind the engine room.
[0031]
The third G sensor 32 is used for controlling the side airbag, and is provided at a position A in the B pillar 51 as shown in FIG.
[0032]
The attachment position of the second G sensor 31 is assumed to be any of the six locations described below. In any case, the second G sensor 31 is provided in order to detect the actual acceleration applied to the occupant by the impact at the time of the accident as accurately as possible.
[0033]
(1) The second G sensor 31 is integrated with the third G sensor 32 and attached to the positions A inside the left and right B pillars 51 in FIG. This position A is a position empirically obtained by experiments or the like, and is a position where the second G sensor 31 can accurately measure the impact. In this case, since the wiring lines of the first and second G sensors to the control unit 11 can be made common, the mounting work and the wiring laying work can be simplified in the manufacturing process.
[0034]
(2) The second G sensor 31 is attached to each of the left and right positions B of the cross member 52 that is a reinforcing member of the vehicle body structure. When mounting at this position, since the influence of the resonance of the vehicle body is low, the superimposition of noise due to the resonance vibration to the output signal of the sensor can be reduced.
[0035]
(3) The second G sensor 31 is attached to the position C of the floor panel below the center console 55. In this case, since it is near the center of the vehicle body, the sensor can be shared for the driver seat and the passenger seat.
[0036]
(4) The second G sensor 31 is integrated with the side airbag inflator, and each of the driver seat 21 and the passenger seat 13 together with the side airbag inflator 61 as shown in FIG. Embedded at position E inside the seat back. In this case, the second G sensor 31 can detect the acceleration including the displacement of the seat slider 23 due to the impact at the time of the accident and the movement of the seat, and the actual acceleration applied to the occupant due to the impact. It can be detected accurately. Moreover, since the wiring line of the 2nd G sensor and the inflator 61 to the control unit 11 can be made common, the installation work and the wiring laying work can be simplified in the manufacturing process.
[0037]
(5) The second G sensor 31 is embedded in the position F inside the seat surface of each of the driver seat 21 and the passenger seat 13 as shown in FIG. In this case, the second G sensor 31 can detect the acceleration including the displacement of the seat slider 23 due to the impact at the time of the accident and the movement of the seat, and the actual acceleration applied to the occupant due to the impact. It can be detected accurately.
[0038]
(6) The second G sensor 31 is attached to the position D of the left and right side sills 53, respectively. This position D is a position empirically obtained by experiments or the like, and is a position where the second G sensor 31 can accurately measure the impact.
[0039]
<Airbag deployment control>
Next, airbag deployment control in the present embodiment will be described. The airbag system of the present embodiment is a highly functional airbag system called a so-called smart airbag system, and the microcomputer 110 deploys airbags such as a driver's seat based on the output signals of the various sensors described above. Control timing and deployment pressure. Specifically, for example, the airbag deployment pressure is increased according to the amount of sliding backward of the driver's seat 21 or according to the amount of reclining of the seat back. Further, when the child seat 12 is attached to the passenger seat 12 in the rearward direction, the deployment of the passenger seat airbag is prohibited. Further, when the occupant's posture on the seat is unstable by the pressure sensor 35, the airbag is prohibited from being deployed or the deployment pressure is lowered.
[0040]
It is assumed that the operation control itself at the time of deployment of these airbags adopts a general method, and detailed description will be omitted in the following description, and description will be made focusing on data recording processing of various sensors.
[0041]
Further, in the present embodiment, the description of the side airbag deployment control using the detection result of the third G sensor 32 is omitted from the airbag deployment control described later for convenience of explanation.
[0042]
First, the outline of the data recording process in the airbag development control in the present embodiment will be described. Output signals of various sensors input to the control unit 11 and the control state of the airbag by the control unit are determined at predetermined timings to be described later. Is stored in the storage unit 11F. The data stored in the storage unit 11F can be read by the data reading device 37 and is used for, for example, situation reproduction (verification) when an accident occurs.
[0043]
Hereinafter, airbag deployment control of the present embodiment will be described with reference to FIGS. 3 and 4.
[0044]
FIG. 4 is a flowchart showing a flow of airbag deployment control as the first embodiment of the present invention. The process shown in this flowchart is started by the microcomputer 110 of the control unit 11 when the occupant turns on the ignition key, for example.
[0045]
The control in the flowchart of FIG. 4 is performed for each of the driver seat airbag and the passenger seat airbag, and it goes without saying that the deployment pressure, the deployment timing, and the like are different between the driver seat side and the passenger seat side. In particular, it is needless to say that the state of wearing the child seat 12 (forward-facing, backward-facing, etc.) is considered for the control of the passenger seat airbag.
[0046]
In FIG. 4, step S1: The CPU 110A performs an initial check of the control unit 11 and the entire system. When this initial check is completed, the CPU 110A starts another process (task) for storing the output values of various sensors described with reference to FIGS. 1 and 2 in the RAM 110C at a predetermined cycle. In this separate process, a predetermined memory space secured in advance in the RAM 110C is used as a so-called rotary buffer, and the output values of various sensors are sequentially stored at predetermined intervals, and the predetermined output space is stored in order to store the latest output values. The oldest sensor output value data temporarily stored in the memory space is deleted.
[0047]
Step S2, Step S3: The CPU 110A reads the detection values G1, G2 of the first G sensor 11A and the second G sensor 31 in the RAM 110C, and calculates an average value Ga of the detection values G1, G2.
[0048]
Step S4: The CPU 110A compares the average value Ga calculated in step S3 with a predetermined value of acceleration registered in advance (3G in the present embodiment). The process returns to step S2.
[0049]
Step S5, Step S6: If YES in Step S4, the CPU 110A reads the output values of the various sensors described with reference to FIGS. 1 and 2 from the RAM 110C, and based on the output values, the airbag development threshold V1. , L1, the airbag deployment pressure p1, the airbag deployment timing t1, and the status of the deployment prohibition flag f1 indicating whether the airbag deployment is permitted or prohibited. It goes without saying that map data or the like registered in advance in the ROM 110B or the like is used for this calculation.
[0050]
Step S7: The CPU 110A determines whether or not the status of the airbag deployment prohibition flag f1 calculated in step S6 is “non-deployment (deployment prohibited)”.
[0051]
Step S14: If NO in step S7, the CPU 110A determines that there is no need to expand the air bag, and is larger than the predetermined value 3G in step S4 from the output value data of the RAM 110C that is sequentially stored by the separate process described above. Data of output values of various sensors in a period from the timing a predetermined time α before the timing t3G that detects this to the timing t3G is read (in the following description, the timing t3G is treated as the current time). Next, the CPU 110A stores the read sensor output values, the current time (timing t3G), and the status of the expansion flag (in this case, “no expansion”) in a memory (not shown) inside the storage unit 11F. Then, the process returns to step S2. The CPU 110A manages the storage status of the data in the memory by an address. When storing the latest output value or the like in this step, the memory in which the oldest data is currently stored in the memory. The address of the space is specified, and the latest output value or other data is stored in the storage unit 11F. With this process, the recording data in the storage unit 11F is sequentially updated to new data.
[0052]
Here, information stored in the storage unit 11F will be described.
[0053]
FIG. 3 is a diagram showing the concept of the memory table as the first embodiment of the present invention, and shows the storage status of information when stored in a memory (not shown) inside the recording unit 11F.
[0054]
Explaining each item shown in the figure, from the leftmost, the current time (timing t3G), the output value of the third G sensor from the first G sensor, the output value of the occupant detection sensor 34, the output value of the seat reclining angle detection sensor 26 The data of each item such as the output value of the seat slide amount detection sensor 24, the image data of the CCD camera 33, the status of the airbag (A / B) deployment flag, and the status of the airbag deployment inhibition flag f1 are stored.
[0055]
Among these recorded data, the output values from the first G sensor to the third G sensor, the output value of the occupant detection sensor 34, the output value of the seat reclining angle detection sensor 26, and the output value of the seat slide amount detection sensor 24 are at timing t3G. Further, the data is stored as continuous data in a period from the previous predetermined time α to the timing t3G.
[0056]
In the case of controlling the passenger seat airbag, it goes without saying that the state signal data from the seat sensor unit 18 representing information relating to the child seat is also stored in the memory table of FIG.
[0057]
Step S8: If YES in step S7 (permitted air bag deployment), the CPU 110A moves the occupant's head moving speed V in a period from a timing a predetermined time α before the current time (timing t3G) to the current time. And the movement distance L are calculated. Specifically, the moving speed V may be calculated by integrating the average acceleration Ga calculated in step S3 from a time before the current time (timing t3G) by a predetermined time α to the current time (t = 0). The moving distance L may be obtained by integrating the calculated moving speed V within the same time or by obtaining the product of the average acceleration Ga and the predetermined time α.
[0058]
Step S9, Step S10: The CPU 110A compares the moving speed V and the moving distance L of the occupant's head calculated in Step S8 with predetermined values V1 and L1, respectively, and if both are smaller than the predetermined values V1 and L1, It is determined that there is no need to deploy the airbag, and the process proceeds to step S14.
[0059]
Step S11: If YES in step S10, it is determined that the airbag needs to be deployed, and the CPU 110A initiates the airbag inflator at the airbag deployment timing t1 and the airbag deployment pressure p1 calculated in step S6.
[0060]
Step S12: The CPU 110A stores data such as sensor output values read from the RAM 110C in the storage unit 11F in the same manner as in the above-described step S14. In this case, the status of the expansion flag is “development: present”. Further, as shown in FIG. 3, the timing at which the inflator is detonated in step S12 is marked as a sensor output value.
[0061]
Step S13: In order to prevent new data from being overwritten in the memory area of data such as sensor output stored in step S12, the CPU 110A sets a storage prohibition flag.
[0062]
[Second Embodiment]
Next, a second embodiment will be described. The present embodiment differs from the first embodiment in a flowchart of airbag deployment control.
[0063]
FIG. 5 is a flowchart showing a flow of airbag deployment control as the second embodiment of the present invention. The basic processing configuration is the same as in FIG. 4, and the same processing steps are given the same step numbers and the description thereof is omitted.
[0064]
In the present embodiment, the CPU 110A reads the detection values G1 and G2 of the first G sensor 11A and the second G sensor 31 in the RAM 110C in step S2. In step S4A, it is determined whether or not the detection value G1 is greater than the predetermined value 3G. If YES, the same processing as in the first embodiment is performed in step S5 and subsequent steps. On the other hand, if the detected value G1 is smaller than the predetermined value 3G in step S4A, it is determined in step S21 whether the detected value G2 is larger than the predetermined value 2G.
[0065]
If NO in step S21, the process returns to step S2. On the other hand, if YES in step S21, in step S22, the CPU 110A does not deploy the airbag, but the sensor output value and the like read from the RAM 110C as in the process of step S14 in FIG. It memorize | stores in the memory | storage unit 11F, and returns to step S2. In this case, the output value data of various sensors in a period from the timing a predetermined time α before the timing t3G, which is detected to be larger than the predetermined value 3G in step S4A, to the current time is stored.
[0066]
According to the present embodiment, even when the impact applied to the vehicle is smaller than the threshold value (3G) for deploying the airbag, when the detection value G2 of the second G sensor 31 is larger than 2G, the configuration is stored in the storage unit 11F. Therefore, the impact applied to the occupant when the airbag is not deployed can be collected and reproduced in detail as compared with the first embodiment.
[0067]
[Third Embodiment]
Next, a third embodiment will be described. In the second embodiment described above, for example, when the occupant himself / herself changes the seating state, the position in the front-rear direction of the seat or the reclining amount of the seatback is suddenly changed, the impact due to the adjustment becomes a threshold. If it is larger than the value (2G), the control unit 11 may store data of output values of various sensors in the storage unit 11F. Therefore, in the present embodiment, a process for storing an impact which is a safety problem applied to the vehicle and the occupant is realized. This embodiment is also based on the first and second embodiments, and the difference is a flowchart of airbag deployment control.
[0068]
FIG. 6 is a flowchart showing a flow of airbag deployment control as the third embodiment of the present invention. The basic processing configuration is the same as in FIG. 4, and the same processing steps are given the same step numbers and the description thereof is omitted.
[0069]
In the present embodiment, the CPU 110A reads the detection values G1 and G2 of the first G sensor 11A and the second G sensor 31 in the RAM 110C in step S2. In step S4A, it is determined whether or not the detection value G1 is greater than the predetermined value 3G. If YES, the same processing as in the first embodiment is performed in step S5 and subsequent steps. On the other hand, if the detection value G1 is smaller than the predetermined value 3G in step S4A, it is determined in steps S31 and S32 whether the detection value G1 and the detection value G2 are larger than the predetermined value 2G. As a result, when the detection value G1 or the detection value G2 is smaller than the predetermined value 2G, the process returns to step S2. On the other hand, if the detected value G1 and the detected value G2 are larger than the predetermined value 2G in step S31 and step S32, respectively, the process proceeds to step S14 and the data such as the sensor output value read from the RAM 110C as in the first embodiment, It memorize | stores in the memory | storage unit 11F, and returns to step S2. In this case as well, as in the second embodiment, the output values of the various sensors in the period from the timing a predetermined time α before the current time to the current time from the timing t3G that is detected to be greater than the predetermined value 3G in step S4A. Store the data.
[0070]
According to the present embodiment, similarly to the second embodiment, even when the impact applied to the vehicle is smaller than the threshold (3G) for deploying the airbag, the detection values of the first and second G sensors are more than 2G. When it is large, the storage unit 11 </ b> F is configured to store it, so that the impact applied to the occupant can be collected and reproduced in more detail as compared with the first embodiment. In particular, in the present embodiment, when the detection value G1 and the detection value G2 are both larger than the threshold value 2G (steps S31 and S32), the output value data of various sensors is stored, so that the storage capacity is limited. It is possible to prevent storing unnecessary data in the memory of the storage unit 11F for verification of the impact on the vehicle and the occupant.
[0071]
<Effect of embodiment>
As described above, according to each of the above-described embodiments, the second G sensor 31 is provided in any position shown in FIG. 7 in the vicinity of an occupant in the vehicle interior. Therefore, when an accident occurs only by the first G sensor 11A. As compared with the case of recording the impact, the impact actually applied to the occupant can be detected more accurately.
[0072]
Also, as shown in FIG. 3, the output values of various sensors used for airbag deployment control are stored from a predetermined timing before the detected acceleration exceeds a predetermined value (2G or 3G) (before a predetermined time α). Since it is recorded in the unit 11F, for example, after an accident occurs, the situation at the time of the accident of the vehicle and its occupant can be accurately reproduced based on the data recorded in the storage unit 11F.
[0073]
【The invention's effect】
As described above, according to the present invention, it is possible to provide a vehicle airbag system that accurately detects an impact applied to a vehicle occupant and records the state of the impact.
[0074]
[Brief description of the drawings]
FIG. 1 is a system configuration diagram showing an outline of an airbag system as a first embodiment of the present invention.
FIG. 2 is a block configuration diagram showing an outline of a control unit 11 as a first embodiment of the present invention.
FIG. 3 is a diagram showing a concept of a memory table as the first embodiment of the present invention.
FIG. 4 is a flowchart showing a flow of airbag deployment control as the first embodiment of the present invention.
FIG. 5 is a flowchart showing a flow of airbag deployment control as a second embodiment of the present invention.
FIG. 6 is a flowchart showing a flow of airbag deployment control as a third embodiment of the present invention.
FIG. 7 is a diagram for explaining a variation in the attachment position of the acceleration sensor as the first embodiment of the invention.
FIG. 8 is a diagram for explaining a variation of the attachment position of the acceleration sensor as the first embodiment of the present invention.
FIG. 9 is a diagram for explaining the arrangement of communication antennas in a passenger seat according to the first embodiment of the present invention.
FIG. 10 is a diagram showing a configuration of a child seat 12 as a first embodiment of the present invention.
[Explanation of symbols]
11: control unit, 11A: first G sensor, 11B: stabilized power supply circuit, 110: microcomputer, 11C: output control unit, 11D: monitoring unit, 11E: timing unit, 11F: storage unit, 11G: connector, 12: Child seat, 13: passenger seat, 15: instrument panel, 16: passenger seat inflator, 17: driver seat inflator, 18: seat sensor unit, 21: driver seat, 22: seat belt feed amount detection sensor, 23: slider mechanism, 24: seat slide amount detection sensor, 25: reclining mechanism, 26: reclining angle detection sensor, 27: seat belt, 31: second G sensor, 32: third G sensor, 33: CCD camera, 34: occupant detection sensor, 35: Pressure sensor, 36: Battery, 37: Data reading Device: 51: B pillar, 52: Cross member, 53: Side sill, 54: Front panel, 55: Center console, 61: Inflator for side airbag, 110A: CPU, 110B: ROM, 110C: RAM, 121: Transponder, 122: belt, 131R, 131F: reception antenna, 132: transmission antenna, 151: status display lamp, 152: failure warning lamp,

Claims (21)

First detection means for detecting forward vehicle acceleration applied to the vehicle ;
Second detection means for detecting forward occupant acceleration applied to the vehicle occupant ;
When the average value of the vehicle acceleration detected by the first detection means and the occupant acceleration detected by the second detection means is greater than a threshold value, airbag deployment control is performed. Control means for storing the occupant acceleration detected by the two detection means in a memory;
Air bag system for a vehicle, characterized in that it comprises a. The control means, when the average value is larger than the threshold value, derives the moving speed and moving distance of the occupant's head from the average value, and based on the moving speed and the moving distance, The vehicle airbag system according to claim 1, wherein it is determined whether to perform airbag deployment control. 3. The control device according to claim 2, wherein the occupant acceleration is stored in a memory even when it is determined not to perform airbag deployment control based on the moving speed and the moving distance. The vehicle airbag system described. First detection means for detecting forward vehicle acceleration applied to the vehicle ;
Second detection means for detecting forward occupant acceleration applied to the vehicle occupant ;
Control for performing airbag expansion control when the vehicle acceleration detected by the first detection means is greater than a first threshold, and storing the passenger acceleration detected by the second detection means in a memory Means,
Air bag system for a vehicle, characterized in that it comprises a. The control means stores the detected occupant acceleration in a memory when the occupant acceleration becomes larger than a second threshold value even when the airbag deployment control is not performed. The vehicle airbag system according to claim 4. The control means stores the detected occupant acceleration in a memory when the vehicle acceleration is greater than a second threshold value even when the airbag deployment control is not performed. The vehicle airbag system according to claim 4. Even when the airbag deployment control is not performed, when the vehicle acceleration and the occupant acceleration are both greater than a second threshold value, the control means determines the detected occupant acceleration. The vehicle airbag system according to claim 4, wherein the vehicle airbag system is stored in a memory.   5. The vehicle airbag system according to claim 1, wherein the second detection unit is provided below a B pillar of the vehicle. Furthermore, a third detecting means for determining whether or not the side airbag is deployed is provided,
And its third detecting means and the second detecting means, in the vehicle, placed in the same position,
Wherein the second detection means, wherein the third detecting means, a vehicle air bag system for according to claim 1 or 4 wire line and wherein the common. Vehicle air bag system for according to claim 1 or 4, characterized in that said second detecting means, provided in the side sill of the vehicle. Air bag system for a vehicle according to claim 1 or 4, characterized in that said second detecting means, provided in the floor panel of the vehicle.   12. The vehicle airbag system according to claim 11, wherein the second detection means is provided on the floor panel and below a center console of the vehicle. Wherein the second detection means, where to be located in the seating position below the occupant, vehicle air bag system for according to claim 1 or 4, characterized in that provided on the member for reinforcing the vehicle in the lateral direction. Air bag system for a vehicle according to claim 1 or 4, characterized in that said second detection means, provided to the seat inside the vehicle. Wherein the second detection means, a vehicle air bag system for according to claim 1 or 4, characterized in that provided within the bearing surface of the sheet. Wherein the second detection means, a vehicle air bag system for according to claim 1 or 4, characterized in that provided inside the seat back of the seat. The second detection means is attached at the same position as the side airbag detonation means provided inside the seat back,
17. The vehicle airbag system according to claim 16, wherein the second detection means and the initiation means have a common wiring line . 5. The vehicle airbag system according to claim 1, wherein the control unit stores, in the memory, the time when the control unit determines to record the occupant acceleration together with the occupant acceleration . The first detection means is a vehicle compartment in front of the vehicle, a vehicle air bag system for according to claim 1 or 4, characterized in that provided in front of the mounting position of the second detection means. The control means temporarily stores the occupant acceleration in the RAM as needed, and when it is determined to record the occupant acceleration, the occupant acceleration from a timing that is a predetermined time before the determination is stored in the RAM. The vehicle airbag system according to claim 1, wherein the vehicle airbag system is read out from the vehicle and stored in the memory. 5. The vehicle according to claim 1, wherein the memory stores not only the occupant acceleration but also the vehicle acceleration, the presence or absence of an occupant, a detected seat reclining angle, and a detected seat slide amount. Airbag system.

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