JP2015182584A - occupant protection control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent delay of collision determination.SOLUTION: A pressure sensor 3 detects a pressure signal P which is generated by impact applied to a vehicle V, an acceleration sensor 1 detects an acceleration signal G generated on the vehicle V, and an integral arithmetic part 7c (acceleration signal integral arithmetic part) performs time integration of the acceleration signal G for calculating an acceleration signal integral value. Then, an occupant protection determination threshold value setting part 10 sets an occupant protection determination threshold value TH/L for operating an occupant protection module 30 for protecting an occupant during collision of the vehicle V to become lower as the pressure signal P is larger. When magnitude of the acceleration signal G exceeds the occupant protection determination threshold value TH/L, an acceleration integral value determination part 7d (integral value determination part) detects collision of the vehicle V based on the acceleration signal integral value, and an occupant protection module operation determination part 12 outputs a command for operating the occupant protection module 30.

Description

  The present invention relates to an occupant protection control device that can make an operation determination of an occupant protection module optimally.

  2. Description of the Related Art Conventionally, an occupant protection control device that activates an occupant protection module (for example, an air bag) is known in order to determine a collision when the vehicle collides and to reduce an impact applied to the occupant. As such an occupant protection control device, for example, an acceleration sensor that detects acceleration generated by an impact applied to a vehicle body due to a side collision and an acceleration signal output from the acceleration sensor are time-integrated to calculate a speed value. And an airbag controller that outputs a command to deploy an airbag when the speed value exceeds an occupant protection determination threshold value that requires occupant protection (see, for example, Patent Document 1).

JP 2001-247000 A

  However, in the conventional occupant protection control device configured as described above, the speed value is calculated by time-integrating the acceleration signal output from the acceleration sensor. In order to perform this integral calculation, it is necessary to detect the acceleration signal over a predetermined time, and therefore it takes time to determine the collision. Therefore, there is a possibility that a delay will occur in the determination of the operation of the passenger protection module, and there is an increased possibility of inducing secondary damage such as a delay in the deployment of the airbag and an electric shock due to a leakage of a strong electric unit (inverter or DC-DC converter). There was a problem.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an occupant protection control device that can reduce the delay time of collision determination.

  An occupant protection control device according to the present invention is installed on left and right side surfaces of a vehicle, detects a pressure signal generated by an impact applied in the vehicle width direction of the vehicle, and an acceleration sensor detects an acceleration signal generated in the vehicle. A pressure signal integration calculation unit that calculates the pressure signal integral value by time integrating the pressure signal, an acceleration signal integration calculation unit that calculates the acceleration signal integration value by time integration of the acceleration signal, and the pressure signal An occupant protection determination threshold value setting unit that sets an occupant protection determination threshold value that activates an occupant protection module that protects an occupant in the event of a vehicle collision, and the magnitude of the acceleration signal indicates the occupant protection An integral value determining unit that detects a collision of the vehicle based on the acceleration signal integral value when the determination threshold value is exceeded, and the multiplication based on the determination result of the integral value determining unit. The occupant protection module actuation determining section for outputting a command to operate the protection module, and having a.

  According to the occupant protection control device according to the present invention, the pressure sensors installed on the left and right side surfaces of the vehicle detect pressure signals generated by an impact applied in the vehicle width direction of the vehicle, and the acceleration sensor generates an acceleration signal generated in the vehicle. The pressure signal integration calculation unit calculates the pressure signal integration value by time integration of the pressure signal, and the acceleration signal integration calculation unit calculates the acceleration signal integration value by time integration of the acceleration signal. The occupant protection determination threshold value setting unit sets an occupant protection determination threshold value that activates an occupant protection module that protects the occupant in the event of a vehicle collision based on the magnitude of the pressure signal. When the value exceeds the occupant protection determination threshold, the integral value determination unit detects a vehicle collision based on the acceleration signal integrated value, and the occupant protection module activation determination unit issues a command to activate the occupant protection module. Output. Therefore, the occupant protection judgment threshold value for operating the occupant protection module is changed based on the magnitude of the pressure signal, and the occupant protection is detected when the magnitude of the acceleration signal exceeds the occupant protection judgment threshold value. Since it is determined that the module is to be operated, the collision determination start delay time is shortened, so that the collision determination can be performed without delay. As a result, it is possible to suppress the occurrence of secondary damage such as an electric shock due to an airbag malfunction or electric leakage.

It is a block diagram which shows the structure of the passenger | crew protection control apparatus of Example 1 which is one Embodiment of this invention. It is a functional block diagram which shows the function structure of the passenger | crew protection control apparatus of Example 1 which is one Embodiment of this invention. It is a graph explaining operation | movement of Example 1, (a) is a graph which shows an example of a pressure signal. (B) is a graph which shows an example of an acceleration signal, and the example which revised downward the passenger | crew protection judgment threshold value. 3 is a flowchart illustrating a flow of processing performed by the occupant protection control device according to the first embodiment.

Hereinafter, specific embodiments of an occupant protection control device of the present invention will be described with reference to the drawings.
[Description of configuration]

  FIG. 1 is a schematic diagram illustrating a vehicle V to which the occupant protection control device 100 according to the first embodiment is applied. FIG. 2 is a functional block diagram illustrating a functional configuration of the occupant protection control device 100.

  The vehicle V on which the occupant protection control device 100 is mounted is mainly intended for passenger cars, but in addition, various vehicles such as commercial vehicles, buses, trucks, construction vehicles, and agricultural vehicles may be widely included. Further, the vehicle V may be a vehicle (hybrid vehicle, electric vehicle, fuel cell vehicle) having a motor as well as an engine as a power source. Furthermore, except for sensors such as an acceleration sensor 1 and a pressure sensor 3 described later, the occupant protection control device 100 may be configured by hardware or software. Hereinafter, it is assumed that the vehicle V in the present embodiment is a hybrid vehicle having both an engine and a motor as power sources.

  When a collision occurs in the vehicle V, the occupant protection control device 100 determines that the collision has occurred and activates the occupant protection module 30.

  As shown in FIG. 1, the occupant protection control device 100 includes an acceleration sensor 1, a pressure sensor 3, a center acceleration sensor 4, an occupant protection control means 5, and an occupant protection module 30.

  The occupant protection module 30 determines that the vehicle V has collided, and a side airbag 17 (airbag) that relieves an impact applied to the occupant, and a seat belt that winds up the seat belt and securely restrains the occupant at the time of the collision. It has a pretensioner 16 and a power cut-off device 18 (high power system power cut-off function) for cutting off the power supplied to the high power unit after the collision.

  The acceleration sensor 1 is provided on the left and right B pillar members 22 between the front seat door 20 and the rear seat door 21 of the vehicle V, and is an acceleration signal G generated by an impact at the time of collision along the vehicle width direction of the vehicle V. Is detected.

  The pressure sensor 3 is provided in the left and right front seat doors 20 and 20 and detects a pressure signal P generated by the collapse of the door panel at the time of a collision.

  The center acceleration sensor 4 is provided in the vicinity of the center console of the vehicle V and detects an acceleration signal G generated by an impact at the time of collision.

  The occupant protection control means 5 receives each sensor signal output from the acceleration sensor 1, the pressure sensor 3, and the center acceleration sensor 4, and needs to operate the occupant protection module 30 based on these sensor signals. It is determined whether or not an impact has occurred, and when it is determined that the occupant protection module 30 needs to be operated, the occupant protection module 30 is operated to suppress the occurrence of secondary damage after the collision.

  As shown in FIG. 2, the occupant protection control means 5 includes an acceleration determination unit 7, a pressure determination unit 9, an occupant protection determination threshold setting unit 10, a center acceleration determination unit 11, and an occupant protection module operation determination. Part 12.

  The acceleration determination unit 7 is connected to the acceleration sensor 1, and includes a high-pass filter 7a, a low-pass filter 7b, an integration calculation unit 7c (acceleration signal integration calculation unit), an acceleration integral value determination unit 7d (integration value determination unit), An acceleration signal level determination unit 7e and an AND circuit 7f are provided.

  The high pass filter 7a removes a low frequency component from the input acceleration signal G. The low-pass filter 7b removes a high frequency component from the input acceleration signal G.

  Further, the integration calculation unit 7c (acceleration signal integration calculation unit) calculates the speed change value (integration value) by time-integrating the acceleration signal G. The acceleration integral value determination unit 7d (integration value determination unit) detects a collision of the vehicle V based on the speed change value and a predetermined threshold value set in advance. The acceleration signal level determination unit 7e determines the magnitude of the acceleration signal G. When the AND circuit 7f determines based on the determination results of the acceleration integral value determination unit 7d and the acceleration signal level determination unit 7e that an impact that needs to operate the occupant protection module 30 has occurred, the third operation signal S3. Is output.

  The pressure determination unit 9 is connected to the pressure sensor 3, and includes a high-pass filter 9a, a low-pass filter 9b, a trigger determination unit 9c, an inclination calculation unit 9d, an inclination determination unit 9e, and a first pressure signal level determination unit 9f. , Integral calculating unit 9g (pressure signal integral calculating unit), first pressure integrated value determining unit 9h, second pressure signal level determining unit 9i, second pressure integrated value determining unit 9j, OR circuit 9k, and AND A circuit 9l and an AND circuit 9m are provided. And the pressure signal produced by the collapse of a door panel is detected.

  The high pass filter 9a removes a low frequency component from the input pressure signal P. The low pass filter 9b removes a high frequency component from the input pressure signal P.

  The trigger determination unit 9c determines that the pressure signal P has exceeded a predetermined trigger level TH / L0, and starts setting the occupant protection determination threshold value TH / L in the occupant protection determination threshold value setting unit 10. Instruct.

  The inclination calculating unit 9d calculates a change amount (inclination) of the input pressure signal P, and the inclination determining unit 9e determines whether or not the magnitude of the inclination of the pressure signal P exceeds a predetermined value.

  The first pressure signal level determination unit 9f determines whether or not the magnitude of the pressure signal P exceeds a predetermined value.

  The integral calculation unit 9g (pressure signal integration calculation unit) calculates the pressure change value (integral value) by time-integrating the pressure signal P, and the first pressure integrated value determination unit 9h is preset with the pressure change value. The collision of the vehicle V is detected based on the predetermined threshold value.

  The second pressure signal level determination unit 9i has the same function as the first pressure signal level determination unit 9f, and the second pressure integral value determination unit 9j has the same function as the first pressure integral value determination unit 9h. Have.

  In the OR circuit 9k, an impact has occurred in which one of the inclination determination unit 9e, the first pressure signal level determination unit 9f, and the first pressure integral value determination unit 9h needs to operate the occupant protection module 30. When it is determined, a signal indicating that the occupant protection module 30 needs to be operated is output to the AND circuit 9m.

  When the second pressure signal level determination unit 9i and the second pressure integral value determination unit 9j determine that an impact that requires the occupant protection module 30 to occur has occurred, the AND circuit 9l On the other hand, a signal indicating that the passenger protection module 30 needs to be operated is output.

  The AND circuit 9m outputs the first operation signal S1 when both the OR circuit 9k and the AND circuit 9l determine that an impact that requires the occupant protection module 30 to occur has occurred.

  Note that the second pressure signal level determination unit 9i, the second pressure integral value determination unit 9j, and the AND circuit 9l are erroneously detected from the AND circuit 9m by the erroneous determination when the OR circuit 9k makes a determination error. It is installed for the purpose of preventing the actuation signal S1 from being output.

  The occupant protection determination threshold value setting unit 10 sets the occupant protection determination threshold value TH / L based on the pressure signal P branched by the trigger determination unit 9c of the pressure determination unit 9. Then, the sensor signal output from the acceleration sensor 1 is compared with the set occupant protection determination threshold value TH / L, and the sensor signal output from the acceleration sensor 1 sets the occupant protection determination threshold value TH / L. When it exceeds, it judges that the impact which needs to operate the passenger | crew protection module 30 has generate | occur | produced, and outputs 2nd operation signal S2.

  The center acceleration determining unit 11 performs a collision safing determination based on the sensor signal output from the center acceleration sensor 4 and determines that an impact that requires the occupant protection module 30 to operate has occurred. 4 operation signal S4 is output.

  The occupant protection module operation determination unit 12 includes a main determination logic unit 12a, a side collision determination logic unit 12b, an OR circuit 12c, and an occupant protection module operation instruction unit 12d.

  The main determination logic unit 12a calculates the logical product of the third operation signal S3 which is a signal from the acceleration determination unit 7 and the fourth operation signal S4 which is a signal indicating the collision safing determination from the center acceleration determination unit 11. And an AND circuit 12a1.

  The side collision determination logic unit 12b is a second operation signal S2 that is an output of the occupant protection determination threshold value setting unit 10, and a fourth operation signal S4 that is a signal indicating a collision safing determination from the center acceleration determination unit 11. OR circuit 12b1 that calculates the logical sum of the two, and an AND circuit 12b2 that calculates the logical product of the output of this OR circuit 12b1 and the first operation signal S1 that is the output of the pressure determination unit 9.

  The OR circuit 12c calculates the logical sum of the output of the side collision determination logic unit 12b and the output of the main determination logic unit 12a.

The occupant protection module operation instruction unit 12d operates the occupant protection module 30 in response to the output of the OR circuit 12c.
[Description of action]

Next, the operation of the occupant protection control device 100 according to the first embodiment will be described in order.
(Pressure signal detection)

The pressure signal P detected by the pressure sensor 3 is read into the pressure determination unit 9, passes through the high pass filter 9a and the low pass filter 9b, and the low frequency component and the high frequency component are removed as noise. In the trigger determination unit 9 c, the pressure signal P is branched and output to the occupant protection determination threshold setting unit 10.
(Acceleration signal detection)

The acceleration signal G detected by the acceleration sensor 1 is read by the acceleration determination unit 7, passes through the high-pass filter 7a, and the low frequency component is removed as noise. The acceleration signal G is output to the occupant protection determination threshold setting unit 10.
(Setting the passenger protection judgment threshold)

  In the occupant protection determination threshold value setting unit 10, an occupant protection determination threshold value TH / L corresponding to the magnitude of the pressure signal P is set. Then, the acceleration signal G is compared with the occupant protection determination threshold value TH / L, and when the acceleration signal G is larger than the occupant protection determination threshold value TH / L, the second operation signal S2 is output.

  Here, a method for setting the occupant protection determination threshold value TH / L performed by the occupant protection determination threshold value setting unit 10 will be described with reference to FIGS.

  FIG. 3A shows an example of the pressure signal P read by the pressure determination unit 9. The solid line indicates the pressure signal P1 generated when the vehicle V collides at time t = 0. For comparison, the dotted line in FIG. 3A shows the pressure signal P2 generated when the door of the vehicle V is closed at time t = 0.

  When the pressure signal P exceeds a predetermined trigger level TH / L0, the trigger determination unit 9c provided in the pressure determination unit 9 detects the passenger protection determination threshold TH / L in the passenger protection determination threshold setting unit 10. Instructs the start of setting.

  The occupant protection determination threshold value setting unit 10 receives the signal from the trigger determination unit 9c and sets the occupant protection determination threshold value TH / L. Specifically, the occupant protection determination threshold value TH / L is set lower as the level of the pressure signal P detected by the trigger determination unit 9c is higher. Note that the relationship between the detected level of the pressure signal P and the occupant protection determination threshold value TH / L is stored in the occupant protection determination threshold value setting unit 10 in advance as a table.

  In this way, when the occupant protection determination threshold value setting unit 10 sets the occupant protection determination threshold value TH / L, the collision determination of the vehicle V is started.

  The occupant protection determination threshold value setting unit 10 compares the set occupant protection determination threshold value TH / L with the acceleration signal G read from the acceleration determination unit 7, and determines that the acceleration signal G determines the occupant protection. When the threshold value TH / L is exceeded, it is determined that an impact required to operate the occupant protection module 30 has occurred, and the second operation signal S2 is output.

  In FIG. 3B, the occupant protection determination threshold value setting unit 10 receives the signal from the trigger determination unit 9c, and updates the occupant protection determination threshold value TH / L from the pre-update threshold value TH / L1. The state of downward correction to the rear threshold value TH / L2 is shown. Here, the solid line in FIG. 3B indicates the acceleration signal G1 generated when the vehicle V actually collides, and the dotted line in FIG. 3B indicates the acceleration generated when the door of the vehicle V is closed. Signal G2 is shown.

  As can be seen from FIG. 3B, the acceleration signal G1 exceeds the pre-update threshold value TH / L1 at time t1 before the occupant protection determination threshold value TH / L is updated. The setting unit 10 determines that the vehicle V may have collided at the time t1.

On the other hand, after the occupant protection determination threshold value TH / L is updated, the acceleration signal G2 exceeds the updated threshold value TH / L2 at time t2. It is determined that the vehicle V may have collided. That is, the collision determination start time of the vehicle V can be advanced from time t1 to time t2 by correcting the occupant protection determination threshold value TH / L downward. This indicates that the time from when the vehicle V actually collides to when the occupant protection control device 100 starts the collision determination is shortened.
(Integration value calculation process and integral value judgment process)

  After detecting that the acceleration signal G exceeds the occupant protection determination threshold value TH / L, the acceleration determination unit 7 integrates the acceleration signal G with time in the integration calculation unit 7c (acceleration signal integration calculation unit). Then, a speed change value (integrated value) is calculated.

Further, the acceleration integral value determination unit 7d (integration value determination unit) detects a collision of the vehicle V on the basis of the speed change value and the magnitude of the acceleration signal G, and requires the occupant protection module 30 to operate. When it is determined that the above has occurred, the third operation signal S3 is output from the AND circuit 7f.
(Collision judgment process using pressure signal)

  Thereafter, the integral value calculation process and the integral value determination process described above are performed on the pressure signal P determined by the trigger determination unit 9c of the pressure determination unit 9, and the occupant protection module 30 is applied to the pressure signal P. When it is determined that there is an impact that needs to be operated, the AND circuit 9m of the pressure determination unit 9 outputs the first operation signal S1.

In the first embodiment, in addition to the integral value calculation process and the integral value determination process, the collision determination is performed in consideration of the magnitude of the gradient of the pressure signal P.
(Passenger protection module activation judgment processing)

  Next, processing performed by the occupant protection module operation determination unit 12 will be described. Through the processing described above, the second operation signal S2 is input from the occupant protection determination threshold value setting unit 10 to the side collision determination logic unit 12b, or the fourth operation signal S4 is input from the center acceleration determination unit 11. In addition, when the first operation signal S1 is input from the pressure determination unit 9, a signal instructing the operation of the occupant protection module 30 is output to the OR circuit 12c.

  When the third operation signal S3 is input from the AND circuit 7f to the main determination logic unit 12a and the fourth operation signal S4 is input from the center acceleration determination unit 11, the occupant protection module is input to the OR circuit 12c. A signal instructing the operation of 30 is output.

  The OR circuit 12c should operate the occupant protection module 30 when a signal instructing the operation of the occupant protection module 30 is input from at least one of the main determination logic unit 12a and the side collision determination logic unit 12b. Judge that there is. On the other hand, if no signal is input from either the main determination logic unit 12a or the side collision determination logic unit 12b, it is determined that the occupant protection module 30 should not be operated.

When the OR circuit 12c determines that the occupant protection module 30 should be operated, the OR circuit 12c outputs a signal to the occupant protection module operation instruction unit 12d. As a result, the occupant protection module 30 is activated, and secondary damage after the collision is suppressed.
[Description of process flow]

  Next, a processing flow of the occupant protection control device 100 according to the first embodiment will be described with reference to FIG.

  (Step S10) The pressure determination unit 9 detects the pressure signal P.

  (Step S12) The trigger determination unit 9c detects whether or not the pressure signal P exceeds a predetermined trigger level TH / L0. When the pressure signal P exceeds the trigger level TH / L0, the process proceeds to step S14, and otherwise, the process returns to step S10.

  (Step S14) The occupant protection determination threshold value setting unit 10 sets an occupant protection determination threshold value TH / L that is a threshold value of the acceleration signal G.

  (Step S16) It is determined whether or not the acceleration signal G is equal to or greater than an occupant protection determination threshold value TH / L. When the condition is satisfied, the process proceeds to step S18, and otherwise, the process returns to step S10.

  (Step S18) The acceleration determination unit 7 starts collision determination.

  (Step S20) The acceleration integral value determination unit 7d (integration value determination unit) and the acceleration signal level determination unit 7e each determine whether or not a collision has occurred. When the condition is satisfied, the process proceeds to step S22, and otherwise, the process returns to step S10.

  (Step S22) The occupant protection module 30 is operated.

  As described above, according to the occupant protection control device 100 according to the first embodiment, the pressure sensor 3 installed on the left and right side surfaces of the vehicle V generates the pressure signal P generated by the impact applied in the vehicle width direction of the vehicle V. Then, the acceleration sensor 1 detects the acceleration signal G generated in the vehicle V, and the integration calculation unit 9g (pressure signal integration calculation unit) time-integrates the pressure signal P to calculate the pressure signal integral value, and integrate The calculation unit 7c (acceleration signal integration calculation unit) calculates the acceleration signal integral value by time-integrating the acceleration signal G. Then, the occupant protection determination threshold value setting unit 10 sets the occupant protection determination threshold value TH / L that activates the occupant protection module 30 that protects the occupant when the vehicle V collides, based on the magnitude of the pressure signal P. Then, when the magnitude of the acceleration signal G exceeds the occupant protection determination threshold value TH / L, the acceleration integration value determination unit 7d (integration value determination unit) collides with the vehicle V based on the acceleration signal integration value. Is detected, and the occupant protection module operation determination unit 12 outputs a command to operate the occupant protection module 30. Therefore, based on the magnitude of the pressure signal P, the magnitude of the occupant protection determination threshold value TH / L for operating the occupant protection module 30 is changed, so that the magnitude of the acceleration signal G becomes the occupant protection judgment threshold value TH. Since it is determined that the occupant protection module 30 is activated when the value exceeds / L, the collision determination start delay time is shortened, so that the collision determination can be performed without delay. As a result, it is possible to suppress the occurrence of secondary damage such as an electric shock due to an airbag malfunction or electric leakage.

  Further, according to the occupant protection control device 100 according to the first embodiment, the occupant protection determination threshold value setting unit 10 lowers and sets the occupant protection determination threshold value TH / L as the pressure signal P increases. Thus, the start time of the operation determination of the occupant protection module 30 can be advanced, thereby avoiding a delay in the operation determination of the occupant protection module 30.

  According to the occupant protection control device 100 according to the first embodiment, the occupant protection module 30 includes at least the side airbag 17 (airbag) and the seat belt pretensioner 16, and the vehicle V is an electric vehicle. In some cases, the occupant protection module 30 further includes a power cut-off device 18 (high power system power cut-off function). Therefore, the passenger protection function can be implemented regardless of whether the vehicle is an electric vehicle or a non-electric vehicle.

  In the first embodiment, the value of the occupant protection determination threshold value TH / L, which is the threshold value of the acceleration signal G detected by the acceleration sensor 1, is set based on the magnitude of the pressure signal P. . However, this is not limited to the threshold setting of the acceleration sensor 1. That is, it can be used to set a threshold value of the acceleration signal detected by the center acceleration sensor 4. The occupant protection control device 100 is generally provided with a plurality of acceleration sensors at various locations on the vehicle V, and can be used for setting threshold values of the respective acceleration sensors.

  Although the embodiments of the present invention have been described in detail with reference to the drawings, the embodiments are only examples of the present invention, and the present invention is not limited to the configurations of the embodiments. Needless to say, design changes and the like within a range not departing from the gist of the invention are included in the present invention.

DESCRIPTION OF SYMBOLS 1 Acceleration sensor 3 Pressure sensor 4 Center acceleration sensor 5 Crew protection control means 7 Acceleration judgment part 7c Integral operation part (acceleration signal integral operation part)
7d Acceleration integral value determination unit (integral value determination unit)
7e Acceleration signal level determination unit 7f AND circuit 9 Pressure determination unit 9c Trigger determination unit 9f First pressure signal level determination unit 9g Integration calculation unit (pressure signal integration calculation unit)
9h 1st pressure integral value judgment part 9i 2nd pressure signal level judgment part 9j 2nd pressure integral value judgment part 10 Crew protection judgment threshold setting part 11 Center acceleration judgment part 12 Crew protection module operation judgment part 12a Main judgment logic part 9l, 9m AND circuit 12b side collision determination logic unit 9k, 12c OR circuit 12d occupant protection module operation instruction unit 30 occupant protection module 100 occupant protection control device G acceleration signal P pressure signal S1 first operation signal S2 second operation signal S3 Third operation signal S4 Fourth operation signal V Vehicle

Claims (3)

A pressure sensor installed on the left and right side surfaces of the vehicle for detecting a pressure signal generated by an impact applied in the vehicle width direction of the vehicle;
An acceleration sensor for detecting an acceleration signal generated in the vehicle;
A pressure signal integration calculation unit that calculates the pressure signal integral value by time-integrating the pressure signal;
An acceleration signal integration calculation unit for calculating an acceleration signal integral value by time-integrating the acceleration signal;
An occupant protection determination threshold value setting unit that sets an occupant protection determination threshold value that activates an occupant protection module that protects an occupant when the vehicle collides, based on the magnitude of the pressure signal;
An integral value determination unit that detects a collision of the vehicle based on the acceleration signal integral value when the magnitude of the acceleration signal exceeds the occupant protection determination threshold;
An occupant protection module operation determination unit that outputs a command to operate the occupant protection module based on a determination result of the integral value determination unit;   2. The occupant protection determination threshold value setting unit according to claim 1, wherein the occupant protection determination threshold value setting unit lowers and sets the occupant protection determination threshold value as the pressure signal is larger.   The occupant protection module includes at least an airbag and a seat belt pretensioner, and when the vehicle is an electric vehicle, the occupant protection module further includes a high-voltage power supply cutoff function. The occupant protection control device according to claim 1 or 2.