JP2006088914A - Collision judging device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a collision judging device for a vehicle capable of performing a proper judgement of collision in accordance with the situation of the collision in a short time and actuating occupant protecting devices appropriately on the basis of the collision judgement. <P>SOLUTION: On an S-V map showing the correlation between the change ΔV in the occupant moving speed and the occupant moving amount ΔS, an SV judgement processing part 25 sets the collision judging threshold to specify an actuation permission for the occupant protecting device or non-permission of actuation for a plurality of actuation conditions including a rapid actuation at one stage of the occupant protecting device, a rapid actuation at multiple stages, and gradual actuation at multiple stages for each of a plurality of occupant protecting devices while referring is made to the result from judging whether a collision of the specified magnitude is sensed by a front clash sensor 11, and for each occupant protecting device, judges whether the correlation between the change ΔVn in the occupant moving speed and the occupant moving amount ΔSn has exceeded the collision judging threshold. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vehicle collision determination device that determines a vehicle collision and activates an occupant protection device such as an air bag device or a seat belt pretensioner.

Conventionally, for example, an acceleration sensor that detects acceleration (or deceleration) applied to the vehicle is provided, and a change in the acceleration of the vehicle is detected by an acceleration signal output from the acceleration sensor. 2. Description of the Related Art There is known a vehicle collision determination device that performs quadratic integration and activates an occupant protection device such as an airbag device or a seat belt pretensioner when these integration values exceed predetermined threshold values.
When a collision is determined by such a vehicle collision determination device, for example, an airbag device ignites a gas generating agent by a squib in an inflator, generates gas from the inflator, and inflates the airbag with this gas. Secondary collision between an occupant and indoor parts is suppressed (for example, see Patent Document 1).
JP 2003-191817 A

By the way, in the vehicle collision determination device according to the above-described prior art, it is desired to control the operation of the occupant protection device by determining the state of the collision within a short time from the occurrence of the collision.
However, if the integrated value of the acceleration signal output from the acceleration sensor exceeds a predetermined threshold value, the operating characteristics of the occupant protection device are not affected by the situation of the collision. There is a possibility that the protection performance is deteriorated without being appropriate.
The present invention has been made in view of the above circumstances, and it is possible to make an appropriate collision determination in a short time in accordance with the collision situation and to make the occupant protection device operate appropriately in accordance with the collision determination. An object is to provide a determination device.

  In order to solve the above-described problems and achieve the object, the vehicle collision determination device according to the first aspect of the present invention is an acceleration detection unit that detects acceleration acting on the vehicle (for example, acceleration according to the embodiment). A sensor (G sensor) 21), a movement amount calculating means for calculating a movement amount of the occupant based on the acceleration signal detected by the acceleration detecting means (for example, the ΔSn calculating unit 24 in the embodiment), Based on the acceleration signal detected by the acceleration detecting means, a moving speed change calculating means for calculating a change in the moving speed of the occupant (for example, the ΔVn calculating unit 23 in the embodiment), the moving amount of the occupant, and the moving speed of the occupant A collision determination threshold setting unit (for example, the SV determination processing unit 25 in the embodiment) that sets a plurality of collision determination thresholds for the correlation of changes, and a passenger movement amount calculated by the movement amount calculation unit. And collision determination means for determining whether or not the correlation between the movement speed changes of the occupant calculated by the movement speed change calculation means exceeds the collision determination threshold (for example, step S07, step S08 in the embodiment, Step S11, step S13, step S15) and depending on the result of determination by the collision determination means, the occupant protection device may be operated slowly in multiple steps, suddenly in multiple steps, or suddenly operated in one step. Control signal generating means for generating a control signal to instruct (for example, the P / T start signal generating unit 27, the first A / B start signal generating unit 29, and the second A / B start signal generating unit 32 in the embodiment) It is characterized by providing.

According to the vehicle collision determination device having the above-described configuration, the occupant protection device is slowly operated in multiple steps, suddenly operated in multiple steps, or suddenly operated in one step according to the determination result of the collision determination with respect to a plurality of collision determination threshold values. By doing so, it is possible to accurately grasp the situation of the collision that has occurred, and to appropriately operate the occupant protection device according to the situation of the collision.
For example, even if the movement speed of the occupant is relatively low, if the movement amount is relatively large and there is a possibility that a secondary collision may occur, the occupant protection device is operated slowly in multiple stages. Thus, it is possible to properly protect the passenger. In addition, even if the amount of movement of the occupant is relatively small, if the occupant obstacle value due to the secondary collision is likely to be high due to the relatively high movement speed, the occupant protection device can be used in multiple stages. It is possible to protect the passengers appropriately by operating them quickly. Furthermore, even if the amount of movement of the occupant is relatively small, the occupant protection device is used when the occupant obstacle value due to the secondary collision may become excessively high due to the relatively high movement speed. The passenger can be properly protected by suddenly operating the vehicle in one step.

  As described above, according to the vehicle collision determination device of the first aspect of the present invention, the occupant protection device is operated slowly or in multiple steps according to the determination results of the collision determination with respect to the plurality of collision determination thresholds. By suddenly actuating step by step or suddenly by one step, it is possible to accurately grasp the situation of the collision that has occurred, and to properly operate the occupant protection device according to the situation of the collision.

Hereinafter, a vehicle collision determination device according to an embodiment of the present invention will be described with reference to the accompanying drawings.
As shown in FIG. 1, for example, the vehicle collision determination apparatus 10 according to the present embodiment includes a plurality of acceleration sensors, for example, two front crash sensors (L-FCS, R-) arranged at the right front portion and the left front portion of the vehicle. FCS) 11 and 11 and a plurality of satellite sensors comprising two side impact sensors (L-SIS, R-SIS) 12 and 12 arranged on the right and left sides of the vehicle, and an electron arranged in the center of the vehicle. The acceleration signal output from each satellite sensor is input to the electronic control unit 20.

The electronic control unit 20 includes, for example, an acceleration sensor (G sensor) 21, a filter processing unit 22, a ΔVn calculation unit 23, a ΔSn calculation unit 24, an SV determination processing unit 25, as shown in FIG. A P / T AND circuit 26, a P / T start signal generator 27, a first A / B AND circuit 28, a first A / B start signal generator 29, a second A / B delay controller 30, A second A / B AND circuit 31 and a second A / B activation signal generator 32 are provided.
The acceleration sensor 21 outputs an acceleration signal G having a voltage level corresponding to the magnitude of acceleration (or deceleration) acting in the front-rear direction and the left-right direction of the vehicle, for example.
The filter processing unit 22 includes a low-pass filter (LPF) that removes a high-frequency component that is a noise component from the acceleration signal G output from the acceleration sensor 21.

The ΔVn calculation unit 23 first integrates the acceleration signal G output from the filter processing unit 22 with respect to time, for example, as shown in the following formula (1), a time interval (tp) of a predetermined time width n with respect to the current time tp. An occupant movement speed change ΔVn at −n ≦ t ≦ tp) is calculated and output to the SV determination processing unit 25.
The ΔSn calculation unit 24 quadraticly integrates the acceleration signal G output from the filter processing unit 22 with respect to time, and, for example, as shown in the following formula (2), a time interval (a predetermined time width n with respect to the current time tp) ( The occupant movement amount ΔSn at tp−n ≦ t ≦ tp) is calculated and output to the SV determination processing unit 25.

  The SV determination processing unit 25 is an SV map indicating the correlation between the occupant movement speed change ΔV and the occupant movement amount ΔS (for example, orthogonal coordinates with the occupant movement amount ΔS as the horizontal axis and the occupant movement speed change ΔV as the vertical axis). ) Above, a collision determination threshold value, which is a boundary value of each region designating each operation permission or each operation disapproval for a plurality of operation states of the occupant protection device, is set as a satellite sensor (for example, front crash sensor (L-FCS or R -FCS) The setting is made for each of a plurality of different occupant protection devices such as an air bag device and a seat belt pretensioner while referring to the determination result of whether or not a collision of a predetermined magnitude has been detected in 11). Then, it is determined for each occupant protection device whether the correlation between the occupant movement speed change ΔVn input from the ΔVn calculation unit 23 and the occupant movement amount ΔSn input from the ΔSn calculation unit 24 exceeds the collision determination threshold value, For example, if it is determined that the collision determination threshold for the seat belt pretensioner has been exceeded, a P / T signal having a true value “1” is output to the P / T AND circuit 26, for example, in one step of the airbag device. When it is determined that each collision determination threshold value corresponding to each stage of the normal operation or multi-stage operation (for example, the operation in two stages) is exceeded, the true value “1” corresponds to the first stage operation. The first A / B signal of “1” is output to the first A / B AND circuit 28 and the second A / B delay control unit 30, and the second A / B signal of the true value “1” is output in response to the second stage operation. Output to the second A / B delay control unit 30.

  The multistage operation of the air bag device is an operation based on a multistage ignition command. When the air bag is generated from the inflator and the air bag is deployed, the gas is not generated at the maximum output at a time. Instead, for example, a plurality of gas generating agents are ignited stepwise in sequence to generate gas. The one-step operation of the air bag device is, for example, to generate a gas by igniting a plurality of gas generating agents at the same timing.

  For example, on the SV map shown in FIG. 3, when the front crash sensor 11 does not detect a predetermined magnitude of collision, the airbag apparatus performs a multi-step slow operation (for example, a two-step slow operation). ) And the collision determination threshold value Goff (for example, the dotted line Goff shown in FIG. 3) for designating whether the operation of the seat belt pretensioner is permitted or not permitted is relatively relative to at least the occupant movement speed change ΔV or the occupant movement amount ΔS. Eliminates low-speed collisions (for example, the broken line C shown in FIG. 3) that do not require operation of the occupant protection device, such as values that allow the operation of the air bag device and seatbelt pretensioner to be permitted in the high value region The value is set high enough to be able to.

Further, in an area where the occupant movement amount ΔS is relatively small and the occupant movement speed change ΔV is relatively large, regardless of the detection result of the front crash sensor 11, the multi-stage sudden operation of the airbag apparatus is performed. For example, two collision determination thresholds A / B1 and A / B2 (for example, as shown in FIG. 3) corresponding to each stage designating operation permission or non-operation permission (for example, sudden operation in two stages). Solid line A / B1, thick dotted line A / B2) are set. The collision determination threshold value A / B1 for designating whether the operation of the first stage of the airbag device is permitted or not permitted is, for example, a low-speed collision where the operation of the occupant protection device is unnecessary (for example, the broken line C shown in FIG. 3) Is set to a value high enough to eliminate. The collision determination threshold value A / B2 for designating the operation permission or non-permission of the second-stage operation of the airbag device is higher than the collision determination threshold value A / B1. Is set to a value that designates the second stage operation permission of the airbag apparatus in the region.
Further, the front crash sensor 11 is provided in a region where the occupant movement amount ΔS is relatively small with respect to a region where the operation permission of the multi-step sudden operation (for example, sudden operation in two steps) of the airbag apparatus is designated. Regardless of the detection result, a collision determination threshold value A / B0 (for example, a thick solid line A / B0 shown in FIG. 3) that designates whether or not to permit one-step sudden operation of the airbag device is set. ing.

  Then, in a region other than the region where the operation permission for the rapid operation of the airbag device is designated, a collision of a predetermined magnitude is detected by the front crash sensor 11 with respect to the collision determination threshold Goff (for example, the dotted line Goff shown in FIG. 3). A collision determination threshold value Gon-A / B (for example, a one-dot chain line Gon-A / B shown in FIG. 3) that designates whether or not to permit the multi-step slow operation of the airbag device when the air bag device is detected; The collision determination threshold value Gon-P / T (for example, a two-dot chain line Gon-P / T shown in FIG. 3) that designates whether or not to permit the operation of the seat belt pretensioner is at least an occupant movement speed change ΔV or an occupant movement. A value that designates the operation permission of the airbag apparatus and the seat belt pretensioner in a region where the amount ΔS is a lower value, that is, the airbag apparatus and The value is set to facilitate the operation of the seat belt pretensioner. Furthermore, with respect to the collision determination threshold Gon-A / B (for example, the one-dot chain line Gon-A / B shown in FIG. 3), the collision determination threshold Gon-P / T (for example, the two-dot chain line Gon-P shown in FIG. 3). / T) is a value that specifies the operation permission of the seat belt pretensioner in a region where at least the occupant movement speed change ΔV or the occupant movement amount ΔS is a lower value, that is, the seatbelt pre-tensioner than the airbag device. The value is set so that the operation of the tensioner is easily permitted.

For the multistage sudden operation of the airbag device, the respective collision determination thresholds A / B1 and A / B2 corresponding to each stage of the multistage sudden operation are set, and the occupant movement speed change ΔVn and When it is determined that the correlation of the occupant movement amount ΔSn exceeds the collision determination threshold A / B1, the first A / B signal having a true value “1” is converted into the first A / B AND circuit 28 and the second A / B delay. When it is output to the control unit 30 and it is determined that the collision determination threshold A / B2 has been exceeded, the second A / B signal having a true value “1” is output to the second A / B delay control unit 30.
On the other hand, only a single collision determination threshold value Gon-A / B is set for the multistage slow operation of the airbag apparatus, and the correlation between the occupant movement speed change ΔVn and the occupant movement amount ΔSn is the collision determination threshold value. When it is determined that Gon-A / B has been exceeded, the first A / B signal having a true value “1” is converted into the first A / B AND circuit 28 and the second A / B delay in response to the first stage operation. It is output to the control unit 30.

The P / T logical product circuit 26 outputs a P / T signal output from the SV determination processing unit 25 and a safing signal having a true value “1” when an acceleration (or deceleration) greater than a predetermined value is detected, for example. A signal obtained by the logical product with the safing signal output from the mechanical or electronic safing sensor 10a is output to the P / T activation signal generator 27 as a P / T signal.
The P / T activation signal generator 27 outputs a command signal for operating the seat belt pretensioner in accordance with the P / T signal output from the P / T logical product circuit 26.

The first A / B AND circuit 28 performs safing of the true value “1” when detecting the first A / B signal output from the SV determination processing unit 25 and, for example, acceleration (or deceleration) greater than a predetermined value. A signal obtained by a logical product with a safing signal output from a mechanical or electronic safing sensor 10a that outputs a signal is output to the first A / B activation signal generator 29 as a first A / B signal.
The first A / B activation signal generator 29 outputs a command signal for operating the airbag device in the first stage according to the first A / B signal output from the first A / B AND circuit 28.

The second A / B delay control unit 30 is based on the first A / B signal or the first A / B signal and the second A / B signal output from the SV determination processing unit 25 after the operation of the airbag device in the first stage. The timing for executing the operation in the second stage, that is, the timing for outputting the second A / B signal is controlled.
The second A / B logical product circuit 31 detects the second A / B signal output from the second A / B delay control unit 30 and the true value “1” when detecting acceleration (or deceleration) greater than a predetermined value, for example. A signal obtained by a logical product with the safing signal output from the safing sensor 10a such as a mechanical type or an electronic type that outputs the safing signal is sent to the second A / B activation signal generator 32 as a second A / B signal. Output.
In response to the second A / B signal output from the second A / B AND circuit 31, the second A / B activation signal generator 32 outputs a command signal for operating the airbag device in the second stage.

  The vehicle collision determination device 10 according to the present embodiment has the above-described configuration. Next, the operation of the vehicle collision determination device 10, particularly, the airbag device is suddenly operated in one step or suddenly in multiple steps. A process for operating or slowly operating will be described.

First, in step S01 shown in FIG. 4, as shown in the above formula (1), the acceleration signal G is linearly integrated with respect to time, and a time interval (tp−n ≦ t) with a predetermined time width n with respect to the current time tp. An occupant movement speed change ΔVn at ≦ tp) is calculated.
Next, in step S02, as shown in the above equation (2), the acceleration signal G is quadratic integrated with respect to time, and a time interval (tp−n ≦ t ≦ tp) with a predetermined time width n with respect to the current time tp. ) To calculate the passenger movement amount ΔSn.
Next, in step S03, it is determined whether or not a collision has been detected in which an integral value ΔV _FCS obtained by performing a primary integration with respect to time on the acceleration signal output from the front crash sensor 11 is equal to or greater than a predetermined threshold # ΔV _FCS. .
When the determination result is “YES”, for example, when a collision such as a front high-speed collision FH or a high-speed offset collision OF is detected, the process proceeds to step S05 described later.
On the other hand, when the determination result is “NO”, for example, when a collision such as a low-speed collision FL is detected, the process proceeds to step S04.

  In step S04, as a collision determination threshold value (S-VMap threshold value) on the SV map, when the front crash sensor 11 does not detect a predetermined magnitude of collision, the airbag device and the seat belt Regardless of the collision determination threshold value Goff (for example, the dotted line Goff shown in FIG. 3) that specifies whether the pretensioner is permitted to operate or not permitted, and the detection result of the front crash sensor 11, the multi-stage sudden operation of the airbag device Collision determination thresholds A / B1, A / B2 (for example, solid line A / B1, thick solid line shown in FIG. 3) corresponding to each stage designating operation permission or non-operation permission (for example, sudden operation in two stages) A / B2) is selected, and the process proceeds to step S06 described below.

  In step S05, when a collision of a predetermined magnitude is detected by the front crash sensor 11 as a collision determination threshold value (S-VMap threshold value) on the SV map, multiple steps of the airbag apparatus are performed. Collision determination threshold value Gon-A / B (for example, one-dot chain line Gon-A / B shown in FIG. 3) and the seat belt pretensioner operation permission or operation permission Regardless of the collision determination threshold value Gon-P / T (for example, the two-dot chain line Gon-P / T shown in FIG. 3) and the detection result of the front crash sensor 11. Each collision determination threshold A / B1, A / B2 (for example, the solid line A / B shown in FIG. 3) corresponding to each stage designating whether the operation is permitted (for example, sudden operation in two stages) or not. 1, to select a thick solid line A / B2), the process proceeds to step S06.

In step S06, the correlation between the occupant movement speed change ΔVn input from the ΔVn calculation unit 23 and the occupant movement amount ΔSn input from the ΔSn calculation unit 24 on the SV map is determined by the selected collision determination. It is determined whether or not a threshold value has been exceeded.
In step S07, an area in which the correlation between the occupant movement speed change ΔVn and the occupant movement amount ΔSn designates a multistage rapid operation (multistage rapid deployment) of the airbag device in accordance with the determination result in step S06. It is determined whether or not.
If this determination is “YES”, the flow proceeds to step S 11 described later.
On the other hand, if this determination is “NO”, the flow proceeds to step S08.

In step S08, since the correlation of the occupant movement speed change ΔVn and the occupant movement amount ΔSn on the SV map exceeds the collision determination threshold Gon-A / B, It is determined whether or not a drive request (First A / B drive request) for the first stage operation has occurred.
When the determination result is “NO”, the series of processes is terminated.
On the other hand, if this determination is “YES”, the flow proceeds to step S 09, and a command signal (First A / B drive request) for operating the airbag device in the first stage is output.
In step S10, an operation of a drive timer for setting a timing for outputting a command signal for operating the airbag device in the second stage after a predetermined delay time has elapsed since the operation in the first stage of the airbag device is performed. A command signal for operating the airbag device in the second stage is output at the time when the predetermined delay time is finished by the driving timer, and the series of processes is finished.

In step S11, the correlation between the occupant movement speed change ΔVn and the occupant movement amount ΔSn on the SV map is equal to or higher than the collision determination threshold A / B0 corresponding to the one-step sudden operation of the airbag device. It is determined whether or not there is.
If this determination is “NO”, the flow proceeds to step S 13 described later.
On the other hand, if the determination is “YES”, the flow proceeds to step S12.
In step S12, a command signal for suddenly operating the airbag device in one step, for example, a command signal indicating that the first and second steps of the airbag device are simultaneously executed is output. Then, a series of processing is terminated.

Further, in step S13, the collision determination corresponding to the first-stage operation of the multi-stage sudden operation of the airbag device is based on the correlation between the occupant movement speed change ΔVn and the occupant movement amount ΔSn on the SV map. It is determined whether or not the threshold is A / B1 or more.
When the determination result is “NO”, the series of processes is terminated.
On the other hand, if this determination is “YES”, the flow proceeds to step S 14 to output a command signal for operating the airbag device in the first stage.
In step S15, the correlation between the occupant movement speed change ΔVn and the occupant movement amount ΔSn on the SV map within a specified time (for example, 5 ms) after the operation of the airbag apparatus in the first stage. Is determined to be equal to or higher than the collision determination threshold A / B2 corresponding to the second-stage operation of the multi-stage rapid operation of the airbag device.
If the determination result in step S15 is “YES”, the process proceeds to step S16, where a command signal (Second A / B drive request) for operating the airbag device in the second stage is immediately output, and the series of processes is completed. To do.
On the other hand, if the determination result in step S15 is “NO”, the process proceeds to step S17, and a command for operating the airbag device in the second stage after the lapse of a specified time after the operation in the first stage of the airbag device. A signal is output and a series of processing is completed.

As described above, according to the vehicle collision determination device 10 according to the present embodiment, the airbag apparatus is multi-staged on the SV map indicating the correlation between the occupant movement amount ΔS and the occupant movement speed change ΔV. Is generated by setting each of the collision determination threshold values Goff, Gon-A / B, A / B1, A / B2, and A / B0 instructing a slow operation, a multi-step sudden operation, and a one-step sudden operation It is possible to accurately and accurately grasp the situation of the collision that has occurred, and to properly operate the occupant protection device according to the situation of the collision.
In particular, even when the occupant movement speed change ΔV is relatively small, if the occupant movement amount ΔS is relatively large, a secondary collision may occur at a timing significantly deviated from the time of the collision. Based on the collision determination threshold values Goff and Gon-A / B, the occupant can be appropriately protected by slowly operating the airbag device in multiple stages. In addition, even when the occupant movement amount ΔS is relatively small, the occupant movement speed change ΔV is relatively large, so that there is a possibility that the occupant obstacle value due to the secondary collision may increase. The passenger can be properly protected by operating in a multi-stage suddenly. Furthermore, even if the occupant movement amount ΔS is relatively small, the occupant obstacle speed value due to the secondary collision may be excessively high because the occupant movement speed change ΔV is relatively large. The passenger can be appropriately protected by suddenly operating the airbag device in one step.

  In the above-described embodiment, the air bag device and the seat belt pretensioner are driven and controlled as the occupant protection device. However, the present invention is not limited to this, and the seat position and shape can be changed. The device may be driven and controlled.

In the above-described embodiment, the collision determination threshold value A / B0 for designating the one-stage sudden operation permission or non-permission of the airbag device, and the multi-stage sudden action permission or non-permission. Each of the collision determination thresholds corresponding to each stage of designating, for example, the two collision determination thresholds A / B1 and A / B2 is set to an invariable value regardless of the detection result of the front crash sensor 11, but is not limited thereto. Instead, each of the collision determination thresholds A / B0, A / B1, and A / B2 may be changed depending on whether or not a collision of a predetermined magnitude is detected by the front crash sensor 11.
In this case, the front crash sensor 11 has a predetermined magnitude for each of the collision determination thresholds A / B0, A / B1, and A / B2 when no collision of a predetermined magnitude is detected by the front crash sensor 11. Each of the collision determination thresholds A / B0, A / B1, and A / B2 when a collision is detected designates permission to operate the airbag apparatus in a region where at least the occupant movement speed change ΔV is a lower value. Such a value, that is, a value that facilitates the operation of the airbag apparatus is set.

  In the above-described embodiment, the collision determination threshold is set for each of a plurality of different occupant protection devices on the SV map. However, the present invention is not limited to this, and an equivalent collision is set for each of a plurality of different occupant protection devices. A determination threshold value may be set.

It is a lineblock diagram of vehicles carrying a collision judging device for vehicles concerning one embodiment of the present invention. It is a lineblock diagram of the collision judging device for vehicles concerning one embodiment of the present invention. It is a figure which shows an example of the collision determination threshold value on a SV map. It is a flowchart which shows the process which makes an airbag apparatus operate | move suddenly or slowly in multiple steps.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Vehicle collision determination apparatus 11 Front crash sensor (2nd acceleration detection means)
12 Side impact sensor (second acceleration detection means)
21 Acceleration sensor (acceleration detection means)
23 ΔVn calculation unit (movement speed change calculation means)
24 ΔSn calculation unit (movement amount calculation means)
25 SV determination processing unit (collision determination threshold setting means)
27 P / T start signal generator (control signal generator)
29 1st A / B activation signal generator (control signal generator)
32 Second A / B activation signal generator (control signal generator)
Step S07, Step S08, Step S11, Step S13, Step S15 Collision determining means

Claims (1)

Acceleration detecting means for detecting acceleration acting on the vehicle;
A movement amount calculating means for calculating a movement amount of the occupant based on the acceleration signal detected by the acceleration detecting means;
Based on the acceleration signal detected by the acceleration detecting means, a moving speed change calculating means for calculating a moving speed change of the occupant;
A collision determination threshold setting means for setting a plurality of collision determination thresholds for the correlation between the movement amount of the occupant and the change in the movement speed of the occupant;
Collision determination means for determining whether or not the correlation between the movement amount of the occupant calculated by the movement amount calculation means and the movement speed change of the occupant calculated by the movement speed change calculation means exceeds the collision determination threshold. When,
Control signal generating means for generating a control signal for instructing the occupant protection device to operate slowly in multiple steps, suddenly in multiple steps, or suddenly in one step according to the determination result in the collision determining means And a vehicle collision determination device.

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