WO2004079374A1 - Testing apparatus for testing a rollever detection system - Google Patents

Testing apparatus for testing a rollever detection system Download PDF

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Publication number
WO2004079374A1
WO2004079374A1 PCT/JP2004/002933 JP2004002933W WO2004079374A1 WO 2004079374 A1 WO2004079374 A1 WO 2004079374A1 JP 2004002933 W JP2004002933 W JP 2004002933W WO 2004079374 A1 WO2004079374 A1 WO 2004079374A1
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WO
WIPO (PCT)
Prior art keywords
information
angular speed
rollover
acceleration
detection system
Prior art date
Application number
PCT/JP2004/002933
Other languages
French (fr)
Inventor
Toshinori Okano
Original Assignee
Calsonic Kansei Corporation
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Publication date
Application filed by Calsonic Kansei Corporation filed Critical Calsonic Kansei Corporation
Publication of WO2004079374A1 publication Critical patent/WO2004079374A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/013—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over
    • B60R21/0132—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over responsive to vehicle motion parameters, e.g. to vehicle longitudinal or transversal deceleration or speed value
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R2021/0002—Type of accident
    • B60R2021/0018—Roll-over
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/013—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over
    • B60R21/0132—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over responsive to vehicle motion parameters, e.g. to vehicle longitudinal or transversal deceleration or speed value
    • B60R2021/01327—Angular velocity or angular acceleration

Definitions

  • the present invention relates to a testing apparatus for testing rollover detection systems which is used to detect the rollover of a vehicle.
  • the rollover detection system for detecting the rollover of a vehicle is installed in a vehicle, which is provided with an occupant protection device such as a side air bag, and serves to detect the rollover of the vehicle and activate the occupant protection device.
  • angular speed information is inputted to the rollover detection system, for example, by rotating the rollover detection system, while a judgment reference time point is calculated on the basis of the angular speed information.
  • a judgment reference time point is calculated on the basis of the angular speed information.
  • an occupant protection device When a vehicle overturns, an occupant protection device is activated at a different timing depending upon the angular speed of the vehicle in the rollover accident and also depending upon the acceleration of the vehicle in the rollover accident in which the acceleration is caused by the shock of the vehicle. For example, when a vehicle goes into a side skid and then collides with a stone curb and the like, there is caused a large acceleration even if the angular speed of the vehicle is small, so that the occupant of the vehicle is significantly moved. In this case, the quick activation of the occupant protection device is urgently needed.
  • a type of a rollover detection system which detects the angular speed and the acceleration of a vehicle respectively as angular speed information and acceleration information and determines an occurrence of the rollover of the vehicle with reference to the angular speed information and the acceleration information as detected.
  • the rollover detection system under test is a rollover detection system which detects a rollover on the basis of angular speed information and acceleration information, it is not easy to accurately determine whether or not the rollover detection system is normal.
  • the present invention is made in order to solve such a prior art problem and used to provide a testing apparatus for testing rollover detection systems which can determine whether or not the rollover detection system is normal with a higher degree of accuracy.
  • a testing apparatus for testing a rollover detection system for vehicle having an angular speed sensor, an acceleration sensor and a detecting section detecting an occurrence of a rollover on the basis of angular speed information and angular speed information as detected, and the testing apparatus comprises: an information output section configured to generate angular speed information and acceleration information and output the angular speed information and the acceleration information to the rollover detection system; a calculation section configured to calculate a reference time point at which an occurrence of a rollover is expected on the basis of the angular speed information and the acceleration information as generated; and an verification section for verifying the rollover detection system configured to determine that the rollover detection system is in a normal operation in a case where the time point at which the rollover detection system detects an occurrence of a rollover substantially agrees with the reference time point.
  • the testing apparatus is characterized in that the angular speed information and the angular speed information are generated on the basis of angular speed information and acceleration information which are acquired in a case where a particular type of vehicle is overturned in accordance with a particular type of rollover.
  • Fig. 1 is an explanatory view for showing the overview of a testing apparatus for testing rollover detection systems in accordance with an embodiment of the present invention.
  • Fig. 2 is a block diagram showing the configuration of the testing apparatus for testing rollover detection systems.
  • Fig. 3 is an explanatory view for showing a rollover situation in which a vehicle overturns with wheels slipping.
  • Fig. 4 is a graphic diagram showing the acceleration information corresponding to Fig. 3.
  • Fig. 5 is a graphic diagram showing the angular information corresponding to Fig. 3.
  • Fig. 6 is an explanatory view for showing a rollover situation.
  • Fig. 7 is a graphic diagram showing the acceleration information corresponding to Fig. 6.
  • Fig. 8 is a graphic diagram showing the angular information corresponding to Fig. 6.
  • Fig. 9 is an explanatory view for showing a rollover situation.
  • Fig. 10 is a graphic diagram showing the acceleration information corresponding to Fig. 9.
  • Fig. 11 is a graphic diagram showing the angular information corresponding to Fig. 9.
  • testing apparatus 1 for testing rollover detection systems in accordance with the embodiment of the present invention (referred to herein as "testing apparatus") will be explained as well as the functions of the respective structural elements.
  • Fig. 1 is an explanatory view for showing the overview of the testing apparatus 1
  • Fig. 2 is a block diagram showing the configuration of the testing apparatus 1.
  • the testing apparatus 1 serves to conduct the test of a rollover detection system 13 and is provided with an input section 5, a trigger output section 51, an information output section (the output means) 6, a servo motor 7, a rotatable plate (rotating means) 71, an inflator 8, a simulator (calculation section) 9, a comparing section 10, a judging section (judging means) 11, and a display 12.
  • the input section 5 determines a vehicle type and a rollover type according to an inputted or selected information being operated by the operator, generates a decision information indicative of the determination and outputs the decision information to the trigger output section 51 and the information output section 6.
  • a vehicle is selected in which the rollover detection system 13 is installed.
  • the trigger output section 51 generates trigger information when the decision information is given from the input section 5, and outputs the information to the information output section 6.
  • the information output section 6 has a memory 61, a timer 62, an angular speed processing section 63, an acceleration processing section 64, a drive section 65, a D/A converting section 66, and an interface 67.
  • the memory 61 as a storage device stores the angular speed information and the acceleration information of a vehicle as acquired, in advance, by overturning the vehicle in association with the time elapsing from a predetermined start time of the test.
  • the above angular speed information and the above acceleration information are stored separately for each of the rollover types and the vehicle types.
  • the vehicle types as stored include the types of the vehicles in which the rollover detection system 13 are installed, and also include the types of other vehicles.
  • Fig. 3 is an explanatory view for showing the rollover of a vehicle 100.
  • An angular speed sensor and an acceleration sensor are mounted on the vehicle 100 followed by overturning the vehicle 100.
  • the varying angular speed and the varying acceleration of the vehicle 100 with time are measured by the angular speed sensor and the acceleration sensor during from a test start time point, which is a time point before the rollover of the vehicle 100 starts, to a time point after the rollover of the vehicle 100 has done.
  • the above information outputted from the angular speed sensor and the acceleration sensor is acquired as angular speed information and acceleration information respectively.
  • the above angular speed information and the above acceleration information as acquired is stored in the memory 61 in association with the time elapsing from the test start time point.
  • Fig. 3 shows a rollover situation in which the vehicle 100 goes into a side skid (a-b), collides with a stone curb and overturns (i.e., the type of trip rollovers)
  • Fig. 4 shows the temporal change (acceleration information) of the acceleration G in the lateral direction of the vehicle corresponding to the above rollover
  • Fig. 5 shows the temporal change (angular information) of the roll angle of the vehicle corresponding to the above rollover.
  • the angular information is obtained by integrating the angular speed information as described above over time.
  • Fig. 6 shows the rollover of the vehicle 100 going round a curve (i.e., the type of turnover rollovers)
  • Fig. 7 shows the acceleration information corresponding to the above rollover
  • Fig. 8 shows the angular information corresponding to the above rollover.
  • the vehicle 100 rotates, while slipping and decelerating, overturns time t3 after the test start time point (with a roll angle of no smaller than 90 degrees) and collides with the land surface rolling onto its side to receive an acceleration due to the collision.
  • Fig. 9 shows a rollover situation in which the vehicle 100 overturns on a downward sloping road (i.e., the type of fall over rollovers).
  • Fig. 10 shows the acceleration information corresponding to the above rollover
  • Fig. 11 shows the angular information corresponding to the above rollover.
  • time t4 elapses after the test start time point
  • the vehicle 100 has already overturned, and its side has collided with the land surface resulting in the shock of the collision which is then detected.
  • the timer 62 of the information output section 6 measures the current time elapsing from the time in a case where trigger information is given from the trigger output section 51, and outputs the timer information about the time as counted to the angular speed processing section 63, the acceleration processing section 64 and the comparing section 10.
  • the angular speed processing section 63 acquires from the memory 61 the angular speed information corresponding to the above decision information on the basis of the decision information given from the input section 5, and outputs the information to the simulator 9.
  • the start time of the test is set to a time point when the trigger information is given from the trigger output section 51.
  • the angular speed processing section 63 determines the current time point on the basis of the timer information given from the timer 62, acquires from the memory 61 the angular speed information corresponding to the current time point as determined from among the angular speed information corresponding to the above decision information, and outputs the angular speed information as acquired to the drive section 65.
  • the acceleration processing section 64 acquires the acceleration information corresponding to the above decision information from the memory 61 on the basis of the decision information given from the input section 5, and output the acceleration information to the simulator 9.
  • the start time of the test is set to a time point when the trigger information is given from the trigger output section 51.
  • the acceleration processing section 64 determines the current time point on the basis of the timer information given from the timer 62, acquires from the memory 61 the acceleration information corresponding to the current time point as determined from among the acceleration information corresponding to the above decision information, and outputs the acceleration information as acquired to the D/A converting section 66.
  • the drive section 65 controls the rotation angle and the rotational speed of the servo motor 7 on the basis of the angular speed information given from the angular speed processing section 63.
  • the D/A converting section 66 performs the D/A conversion of the acceleration information given from the acceleration processing section 64, and outputs the acceleration information as converted to the interface 67.
  • the interface 67 is used to connect the D/A converting section 66 to an A/D converting section 134 of the rollover detection system 13, and output the acceleration information given from the D/A converting section 66 to the
  • A/D converting section 134 The acceleration information in the form of digital signals is converted into analog signals in the case of this embodiment, it is also possible to output the digital signals from the acceleration processing section 64 directly to a rollover sensor 133 through the interface
  • the servo motor 7 rotates the rotatable shaft of the servo motor 7 in accordance with the angular speed information given from the drive section 65.
  • the rotatable plate 71 is fixed to the end of the rotatable shaft of the servo motor 7 as illustrated in Fig. 1 and rotates integrally with the rotatable shaft of the servo motor 7.
  • the rollover detection system 13 is mounted thereon.
  • the rotatable plate 71 and the rollover detection system 13 rotate in accordance with the angular speed information given from the drive section 65.
  • the rollover detection system 13 is installed in a vehicle in order to detect the occurrence of the rollover of the above vehicle, and provided with an angular speed sensor (angular speed detecting mechanism) 131, an acceleration sensor not shown in the figure, an A/D converting section 132, a rollover sensor 133, and an A/D converting section 134.
  • angular speed sensor angular speed detecting mechanism
  • the angular speed sensor 131 detects the angular speed to the angular speed sensor 131 as angular speed information, and outputs the angular speed information as detected to the A/D converting section 132. Since the rollover detection system 13 rotates together with the rotatable plate 71 during the test, the angular speed sensor 131 detects the rotation of the rotatable plate 71.
  • the acceleration sensor detects, as acceleration information, the acceleration applied to the acceleration sensor, and outputs the acceleration information as detected to the rollover sensor 133 through the A/D converting section 134. During the test, acceleration information for the rollover sensor 133 is outputted from the information output section 6 through the
  • A/D converting section 134 to the rollover sensor 133, instead of application of acceleration to the acceleration sensor, and therefore the operator may remove the acceleration sensor when the test is conducted.
  • the A/D converting section 132 perform A/D conversion of the analog signals of the angular speed information given from the angular speed sensor 131, and outputs the converted signals to the rollover sensor 133.
  • the A/D converting section 134 performs A/D conversion of the analog signals of the acceleration information as given through the interface 67, and outputs the converted signals to the rollover sensor 133.
  • the rollover sensor 133 determines whether the rollover of the vehicle has occurred or not on the basis of the angular speed information given from the A/D converting section 132 the acceleration information given from the A/D converting section 134. Then, inflator activation requiring information is generated and output in a case where the above rollover is detected.
  • the acceleration information is directly outputted to the rollover sensor 133 from the information output section 6 through the A/D converting section 134, instead of application of acceleration to the acceleration sensor through the rollover detection system. Namely, in place of the acceleration information output from an acceleration sensor, the acceleration information is given from the above information output section to the rollover sensor 133.
  • the rollover sensor 133 determines whether a rollover has occurred on the basis of the acceleration information given from the information output section 6 and the angular speed information as acquired by the angular speed sensor 131.
  • the timing of detecting varies depending upon the vehicle type and the rollover type and is adjusted by the above rollover sensor 133 in order that a different timing is set in accordance with a different vehicle type and a different rollover type.
  • the rollover sensor 133 is connected to the inflator 8 during the test. Accordingly, the rollover sensor 133 outputs the inflator activation requiring information to the inflator 8.
  • the inflator 8 is activated when the inflator activation requiring information is received from the rollover sensor 133, and then generates information about the time point (activation completing information) as the rollover detection system 13 detects the rollover, and outputs the activation completing information to the comparing section 10.
  • the rollover sensor 133 can be designed to input the output of the rollover sensor 133 directly to the comparing section 10.
  • the simulator 9 calculates a judgment reference time point for starting a detection operation of a rollover on the basis of the angular speed information given from the angular speed processing section 63 and the acceleration information given from the acceleration processing section 64.
  • the judgment reference time point is a time point at which the occurrence of the rollover is expected.
  • the simulator 9 calculates a time period, i.e., a judgment reference time period from the start time of the test to the rollover judgment reference time point as calculated.
  • Judgment reference time period information about the above judgment reference time period as calculated is generated and outputted to the comparing section 10.
  • the judgment reference time point is an optimum time point to detect the rollover of the vehicle. For example, in the case of the rollovers as illustrated in Fig.
  • the rollover judgment reference time point is a predetermined time before a time tO has elapsed since the start time of the test.
  • the rollover judgment reference time point is a predetermined time before a time t3 has elapsed since the start time of the test.
  • the rollover judgment reference time point is a predetermined time before a time t4 has elapsed since the start time of the test.
  • the comparing section 10 provided in an verification section 15 performs the following process on the basis of the timer information given from the timer 62, the activation completing information given from the inflator 8 as rollover detection information, and the judgment reference time period information given from the simulator 9.
  • the above timer information and the activation completing information are used to calculate the time period from the start time of the test to the time point when the inflator 8 is activated, i.e., the time period from the test start time point to the time point when the rollover detection system 13 detects the rollover.
  • the judgment reference time period information is used to compare the above time period as calculated with the judgment reference time period as calculated by the simulator 9.
  • the information indicative of the agreement is generated and output to the judging section 11.
  • the judging section 11 provided in the verification section 15 determines that the rollover detection system 13 operates normally when the information indicative of agreement is given by the comparing section 10, or that the rollover detection system 13 is out of order when the information indicative of disagreement is given.
  • the display 12 visualizes the result of judgment by the judging section 11 in a screen.
  • the procedure of the test by the testing apparatus 1 will be explained with reference to Fig. 1 and Fig. 2.
  • the operator mounts the rollover detection system 13 under test on the rotatable plate 71 as illustrated in Fig. 1, and connects the rollover sensor 133 of the rollover detection system 13 with the inflator 8 of the testing apparatus 1.
  • the operator also connects the input of the A/D converting section 134 with the output of the interface 67.
  • the input section 5 determines a rollover type and a vehicle type in which the rollover detection system 13 is to be installed according to the input manipulation by the operator.
  • the input section 5 generates the decision information relating to the vehicle type and the rollover type and outputs the information to the trigger output section 51, the angular speed processing section 63 and the acceleration processing section 64 as shown in Fig. 2.
  • the trigger output section 51 generates the trigger information when the decision information is given from the input section 5, and outputs the information to the timer 62, the angular speed processing section 63 and the acceleration processing section 64.
  • the timer 62 measures the current time elapsing from the time when the trigger information is given from the trigger output section 51, and outputs the timer information about the time as measured to the angular speed processing section 63, the acceleration processing section 64 and the comparing section 10.
  • the angular speed processing section 63 acquires from the memory 61 the angular speed information corresponding to the above decision information on the basis of the decision information given from the input section 5, and outputs the information to the simulator 9.
  • the acceleration processing section 64 acquires the acceleration information from the memory 61 corresponding to the above decision information on the basis of the decision information given from the input section 5, and output the acceleration information to the simulator 9.
  • the angular speed processing section 63 sets the start time of the test to a time point when the trigger information is given from the trigger output section 51. While determining the current time point on the basis of the timer information given from the timer 62, the angular speed information corresponding to the current time point as determined is acquired from the memory 61 among the angular speed information corresponding to the above decision information and output to the drive section 65.
  • the acceleration processing section 64 sets the start time of the test to a time point when the trigger information is given from the trigger output section 51. While determining the current time point on the basis of the timer information given from the timer 62, then the acceleration information corresponding to the current time point as determined is acquired from the memory 61 among the acceleration information corresponding to the above decision information and output to the D/A converting section 66.
  • the simulator 9 calculates a rollover judgment reference time point and a judgment reference time period on the basis of the angular speed information given from the angular speed processing section 63 and the acceleration information given from the acceleration processing section 64.
  • the judgment reference time period information corresponding to the judgment reference time period as calculated is generated and output to the comparing section 10.
  • the drive section 65 controls the servo motor 7 on the basis of the angular speed information given from the angular speed processing section 63.
  • the D/A converting section 66 performs the D/A conversion of the acceleration information received from the acceleration processing section 64 and outputs the acceleration information as D/A converted to the connectors 67, while the acceleration information as given from the D/A converting section 66 is output to the A/D converting section 134 through the interface 67.
  • the servo motor 7 rotates the rotatable plate 71 and the rollover detection system 13 in accordance with the angular speed information given from the drive section 65. That is, the information output section 6 gives the above angular speed information to the rollover detection system 13 through the servo motor 7.
  • the angular speed sensor 131 of the rollover detection system 13 detects the angular speed of the above rotation as angular speed information, and outputs the angular speed information as detected to the A/D converting section 132.
  • the A/D converting section 132 performs the A/D conversion of the angular speed information given from the angular speed sensor 131, and outputs the angular speed information as converted to the rollover sensor 133.
  • the A/D converting section 134 performs the acceleration information received from the interface 67, and outputs the acceleration information as converted to the rollover sensor 133.
  • the rollover sensor 133 determines whether there is an occurrence of the rollover of the vehicle on the basis of the angular speed information given through the A/D converting section 132 and the acceleration information given through the A/D converting section 134. After determining whether there is an occurrence of the rollover of the vehicle or not, the rollover sensor 133 generates the inflator activation requiring information and outputs this information to the inflator 8. The inflator 8 is activated in response to the inflator activation requiring information given from the rollover sensor 133, then generates activation completing information and outputs this information to the comparing section 10.
  • the comparing section 10 performs the following process on the basis of the timer information given from the timer 62, the activation completing information given from the inflator 8, and the judgment reference time period information given from the simulator 9.
  • the above timer information and the activation completing information are used to calculate the time period from the test start time point to the time point when the inflator 8 is activated, i.e., the time period from the start time of the test to the time point when the rollover detection system 13 detects the rollover.
  • the judgment reference time period information is used to compare the above time period as calculated with the judgment reference time period as calculated by the simulator 9.
  • the judging section 11 determines that the rollover detection system 13 is normal in a case where the agreement information is given by the comparing section 10, and that the rollover detection system 13 is out of order in a case where the disagreement information is given. The above result of judgment is visualized in the screen of the display device 12.
  • the information output section 6 gives angular speed information and acceleration information to the rollover detection system 13 which then detects the rollover of a vehicle on the basis of the angular speed information and the acceleration information as given.
  • the simulator 9 calculates a judgment reference time point, at which the above rollover is detected, on the basis of the same angular speed information and the acceleration information output from the information output section 6.
  • the verification section 15 judges that the rollover detection system 13 is normal in a case where the time point when the rollover detection system 13 detects the rollover substantially agrees with the above rollover judgment reference time point.
  • the information output section 6 outputs the angular speed information and the acceleration information as acquired by actually overturning the vehicle in which the rollover detection system 13 is to be installed, it is possible to determine whether or not the rollover detection system 13 is in a normal operation in the same situation as the rollover detection system 13 actually installed in the vehicle. Accordingly, also from this view point, it is possible to determine whether or not the rollover detection system 13 is in a normal operation with a higher degree of accuracy.
  • the rollover detection system 13 is provided with the angular speed sensor 131.
  • the rollover detection system 13 is rotated by the testing apparatus 1 in accordance with the angular speed information output from the information output section 6, and the angular speed sensor 131 detects the angular speed of the above rotation to output the above angular speed information to the rollover sensor 133. According to those configuration, it is also possible to determine whether or not the angular speed sensor 131 is in a normal operation.
  • the acceleration information is outputted directly to the rollover sensor 133 without the intervention of the acceleration sensor. Accordingly, it is possible to manufacture the testing apparatus 1 in a compact size and with ease at a low cost.
  • the memory 61 is used to store angular speed information and acceleration information as one set of information provided for each of rollover types and vehicle types (inclusive of the vehicles in which the rollover detection system 13 are installed as well as other rollover types), while the information output section 6 acquires from the memory 61 the angular speed information and the acceleration information corresponding to the input manipulation of the input section 5, and output this information. Accordingly, the testing apparatus 1 can make use of the appropriate set of information corresponding to a rollover type and a vehicle type in which the rollover detection system 13 is installed, in order to determine whether or not the rollover detection system 13 is in a normal operation. In other words, it is possible to determine whether or not the rollover detection system 13 is in a normal condition on the basis of the adjustment of the rollover detection system 13.
  • While the rollover detection system 13 is rotated in accordance with the angular speed information outputted from the information output section 6 in order to output the above angular speed information to the rollover sensor 133 in accordance with this embodiment, it is also possible to provide an additional D/A converting section, and connect the angular speed processing section 63 with the rollover sensor 133 through the additional D/A converting section and the A/D converting section 132 in order to output the above angular speed information to the rollover sensor 133 through the additional D/A converting section and the A/D converting section 132. In this case, it can be determined whether or not the rollover detection system 13 is in a normal operation after removing the angular speed sensor 131 from the rollover detection system 13.

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Abstract

The testing apparatus for testing rollover detection systems in accordance with the present invention is provided with an information output section 6 for outputting angular speed information and acceleration information a rollover detection system 13, and a simulator 9 for calculating the rollover judgment reference time point on the basis of the angular speed information and the acceleration information output from the information output section 6. The testing apparatus determines that the rollover detection system 13 is in a normal operation if the time period when the time point when the rollover detection system 13 detects the rollover on the basis of the angular speed information and the acceleration information output from the information output section 6 substantially agrees with the rollover judgment reference time point as calculated by the simulator 9.

Description

DESCRIPTION
TESTING APPARATUS FOR TESTING A ROLLOVER DETECTION
SYSTEM
TECHNICAL FIELD
The present invention relates to a testing apparatus for testing rollover detection systems which is used to detect the rollover of a vehicle.
BACKGROUND ART
The rollover detection system for detecting the rollover of a vehicle is installed in a vehicle, which is provided with an occupant protection device such as a side air bag, and serves to detect the rollover of the vehicle and activate the occupant protection device.
When conducting the test of a rollover detection system, angular speed information is inputted to the rollover detection system, for example, by rotating the rollover detection system, while a judgment reference time point is calculated on the basis of the angular speed information. In a case where the point of time when the rollover detection system detects the rollover of a vehicle on the basis of the angular speed information as given agrees with the judgment reference time point as calculated, it is judged that the rollover detection system is normal.
DISCLOSURE OF INVENTION
When a vehicle overturns, an occupant protection device is activated at a different timing depending upon the angular speed of the vehicle in the rollover accident and also depending upon the acceleration of the vehicle in the rollover accident in which the acceleration is caused by the shock of the vehicle. For example, when a vehicle goes into a side skid and then collides with a stone curb and the like, there is caused a large acceleration even if the angular speed of the vehicle is small, so that the occupant of the vehicle is significantly moved. In this case, the quick activation of the occupant protection device is urgently needed.
A type of a rollover detection system is therefore known which detects the angular speed and the acceleration of a vehicle respectively as angular speed information and acceleration information and determines an occurrence of the rollover of the vehicle with reference to the angular speed information and the acceleration information as detected.
However, if the rollover detection system under test is a rollover detection system which detects a rollover on the basis of angular speed information and acceleration information, it is not easy to accurately determine whether or not the rollover detection system is normal. The present invention is made in order to solve such a prior art problem and used to provide a testing apparatus for testing rollover detection systems which can determine whether or not the rollover detection system is normal with a higher degree of accuracy.
In accordance with a technical aspect of the present invention, a testing apparatus is provided for testing a rollover detection system for vehicle having an angular speed sensor, an acceleration sensor and a detecting section detecting an occurrence of a rollover on the basis of angular speed information and angular speed information as detected, and the testing apparatus comprises: an information output section configured to generate angular speed information and acceleration information and output the angular speed information and the acceleration information to the rollover detection system; a calculation section configured to calculate a reference time point at which an occurrence of a rollover is expected on the basis of the angular speed information and the acceleration information as generated; and an verification section for verifying the rollover detection system configured to determine that the rollover detection system is in a normal operation in a case where the time point at which the rollover detection system detects an occurrence of a rollover substantially agrees with the reference time point.
In accordance with another technical aspect of the present invention, the testing apparatus is characterized in that the angular speed information and the angular speed information are generated on the basis of angular speed information and acceleration information which are acquired in a case where a particular type of vehicle is overturned in accordance with a particular type of rollover.
BRIEF DESCRIPTION OF DRAWINGS
Fig. 1 is an explanatory view for showing the overview of a testing apparatus for testing rollover detection systems in accordance with an embodiment of the present invention.
Fig. 2 is a block diagram showing the configuration of the testing apparatus for testing rollover detection systems.
Fig. 3 is an explanatory view for showing a rollover situation in which a vehicle overturns with wheels slipping.
Fig. 4 is a graphic diagram showing the acceleration information corresponding to Fig. 3. Fig. 5 is a graphic diagram showing the angular information corresponding to Fig. 3. Fig. 6 is an explanatory view for showing a rollover situation.
Fig. 7 is a graphic diagram showing the acceleration information corresponding to Fig. 6.
Fig. 8 is a graphic diagram showing the angular information corresponding to Fig. 6.
Fig. 9 is an explanatory view for showing a rollover situation.
Fig. 10 is a graphic diagram showing the acceleration information corresponding to Fig. 9.
Fig. 11 is a graphic diagram showing the angular information corresponding to Fig. 9.
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be explained with reference to drawings. The configuration of a testing apparatus 1 for testing rollover detection systems in accordance with the embodiment of the present invention (referred to herein as "testing apparatus") will be explained as well as the functions of the respective structural elements. Fig. 1 is an explanatory view for showing the overview of the testing apparatus 1, and Fig. 2 is a block diagram showing the configuration of the testing apparatus 1.
As illustrated in Fig. 1 and Fig. 2, the testing apparatus 1 serves to conduct the test of a rollover detection system 13 and is provided with an input section 5, a trigger output section 51, an information output section (the output means) 6, a servo motor 7, a rotatable plate (rotating means) 71, an inflator 8, a simulator (calculation section) 9, a comparing section 10, a judging section (judging means) 11, and a display 12. The input section 5 determines a vehicle type and a rollover type according to an inputted or selected information being operated by the operator, generates a decision information indicative of the determination and outputs the decision information to the trigger output section 51 and the information output section 6. When the test is conducted, a vehicle is selected in which the rollover detection system 13 is installed.
The trigger output section 51 generates trigger information when the decision information is given from the input section 5, and outputs the information to the information output section 6. The information output section 6 has a memory 61, a timer 62, an angular speed processing section 63, an acceleration processing section 64, a drive section 65, a D/A converting section 66, and an interface 67.
The memory 61 as a storage device stores the angular speed information and the acceleration information of a vehicle as acquired, in advance, by overturning the vehicle in association with the time elapsing from a predetermined start time of the test. The above angular speed information and the above acceleration information are stored separately for each of the rollover types and the vehicle types. The vehicle types as stored include the types of the vehicles in which the rollover detection system 13 are installed, and also include the types of other vehicles.
The method of storing the acceleration information in the memory 61 inclusive of the time-series data of acceleration and the angular speed information inclusive of the time-series data of angular speed will be explained by way of an example as illustrated in Fig. 3. Fig. 3 is an explanatory view for showing the rollover of a vehicle 100.
An angular speed sensor and an acceleration sensor are mounted on the vehicle 100 followed by overturning the vehicle 100. Next, the varying angular speed and the varying acceleration of the vehicle 100 with time are measured by the angular speed sensor and the acceleration sensor during from a test start time point, which is a time point before the rollover of the vehicle 100 starts, to a time point after the rollover of the vehicle 100 has done. The above information outputted from the angular speed sensor and the acceleration sensor is acquired as angular speed information and acceleration information respectively. The above angular speed information and the above acceleration information as acquired is stored in the memory 61 in association with the time elapsing from the test start time point.
The specific examples of the angular speed information and the acceleration information stored in the memory' 61 will be explained with reference to Figs. 3-11. Fig. 3 shows a rollover situation in which the vehicle 100 goes into a side skid (a-b), collides with a stone curb and overturns (i.e., the type of trip rollovers), Fig. 4 shows the temporal change (acceleration information) of the acceleration G in the lateral direction of the vehicle corresponding to the above rollover, and Fig. 5 shows the temporal change (angular information) of the roll angle of the vehicle corresponding to the above rollover. The angular information is obtained by integrating the angular speed information as described above over time. In the rollover situation, the vehicle 100 hits the stone curb time tO after the test start time point, resulting in rapid increase of the coefficient μ of dynamic friction in the lateral direction, and then the side of the vehicle 100 collides with the land surface time t2 after the test start time point. Fig. 6 shows the rollover of the vehicle 100 going round a curve (i.e., the type of turnover rollovers), Fig. 7 shows the acceleration information corresponding to the above rollover, and Fig. 8 shows the angular information corresponding to the above rollover. In the above rollover situation, the vehicle 100 rotates, while slipping and decelerating, overturns time t3 after the test start time point (with a roll angle of no smaller than 90 degrees) and collides with the land surface rolling onto its side to receive an acceleration due to the collision.
Fig. 9 shows a rollover situation in which the vehicle 100 overturns on a downward sloping road (i.e., the type of fall over rollovers). Fig. 10 shows the acceleration information corresponding to the above rollover, and Fig. 11 shows the angular information corresponding to the above rollover. In the above rollover situation, when time t4 elapses after the test start time point, the vehicle 100 has already overturned, and its side has collided with the land surface resulting in the shock of the collision which is then detected.
Information Output Section
The timer 62 of the information output section 6 measures the current time elapsing from the time in a case where trigger information is given from the trigger output section 51, and outputs the timer information about the time as counted to the angular speed processing section 63, the acceleration processing section 64 and the comparing section 10.
The angular speed processing section 63 acquires from the memory 61 the angular speed information corresponding to the above decision information on the basis of the decision information given from the input section 5, and outputs the information to the simulator 9. The start time of the test is set to a time point when the trigger information is given from the trigger output section 51. The angular speed processing section 63 determines the current time point on the basis of the timer information given from the timer 62, acquires from the memory 61 the angular speed information corresponding to the current time point as determined from among the angular speed information corresponding to the above decision information, and outputs the angular speed information as acquired to the drive section 65.
The acceleration processing section 64 acquires the acceleration information corresponding to the above decision information from the memory 61 on the basis of the decision information given from the input section 5, and output the acceleration information to the simulator 9. The start time of the test is set to a time point when the trigger information is given from the trigger output section 51. The acceleration processing section 64 determines the current time point on the basis of the timer information given from the timer 62, acquires from the memory 61 the acceleration information corresponding to the current time point as determined from among the acceleration information corresponding to the above decision information, and outputs the acceleration information as acquired to the D/A converting section 66.
The drive section 65 controls the rotation angle and the rotational speed of the servo motor 7 on the basis of the angular speed information given from the angular speed processing section 63. The D/A converting section 66 performs the D/A conversion of the acceleration information given from the acceleration processing section 64, and outputs the acceleration information as converted to the interface 67. The interface 67 is used to connect the D/A converting section 66 to an A/D converting section 134 of the rollover detection system 13, and output the acceleration information given from the D/A converting section 66 to the
A/D converting section 134. The acceleration information in the form of digital signals is converted into analog signals in the case of this embodiment, it is also possible to output the digital signals from the acceleration processing section 64 directly to a rollover sensor 133 through the interface
67 without passing through the D/A converting section 66 and the A/D converting section 134.
The servo motor 7 rotates the rotatable shaft of the servo motor 7 in accordance with the angular speed information given from the drive section 65. The rotatable plate 71 is fixed to the end of the rotatable shaft of the servo motor 7 as illustrated in Fig. 1 and rotates integrally with the rotatable shaft of the servo motor 7. When the test is conducted with the testing apparatus 1, the rollover detection system 13 is mounted thereon.
Accordingly, when the test is conducted, the rotatable plate 71 and the rollover detection system 13 rotate in accordance with the angular speed information given from the drive section 65.
Rollover Sensor
The rollover detection system 13 is installed in a vehicle in order to detect the occurrence of the rollover of the above vehicle, and provided with an angular speed sensor (angular speed detecting mechanism) 131, an acceleration sensor not shown in the figure, an A/D converting section 132, a rollover sensor 133, and an A/D converting section 134.
The angular speed sensor 131 detects the angular speed to the angular speed sensor 131 as angular speed information, and outputs the angular speed information as detected to the A/D converting section 132. Since the rollover detection system 13 rotates together with the rotatable plate 71 during the test, the angular speed sensor 131 detects the rotation of the rotatable plate 71.
The acceleration sensor detects, as acceleration information, the acceleration applied to the acceleration sensor, and outputs the acceleration information as detected to the rollover sensor 133 through the A/D converting section 134. During the test, acceleration information for the rollover sensor 133 is outputted from the information output section 6 through the
A/D converting section 134 to the rollover sensor 133, instead of application of acceleration to the acceleration sensor, and therefore the operator may remove the acceleration sensor when the test is conducted.
The A/D converting section 132 perform A/D conversion of the analog signals of the angular speed information given from the angular speed sensor 131, and outputs the converted signals to the rollover sensor 133.
The A/D converting section 134 performs A/D conversion of the analog signals of the acceleration information as given through the interface 67, and outputs the converted signals to the rollover sensor 133.
The rollover sensor 133 determines whether the rollover of the vehicle has occurred or not on the basis of the angular speed information given from the A/D converting section 132 the acceleration information given from the A/D converting section 134. Then, inflator activation requiring information is generated and output in a case where the above rollover is detected.
During the test, the acceleration information is directly outputted to the rollover sensor 133 from the information output section 6 through the A/D converting section 134, instead of application of acceleration to the acceleration sensor through the rollover detection system. Namely, in place of the acceleration information output from an acceleration sensor, the acceleration information is given from the above information output section to the rollover sensor 133.
The rollover sensor 133 determines whether a rollover has occurred on the basis of the acceleration information given from the information output section 6 and the angular speed information as acquired by the angular speed sensor 131.
The timing of detecting varies depending upon the vehicle type and the rollover type and is adjusted by the above rollover sensor 133 in order that a different timing is set in accordance with a different vehicle type and a different rollover type.
The rollover sensor 133 is connected to the inflator 8 during the test. Accordingly, the rollover sensor 133 outputs the inflator activation requiring information to the inflator 8. The inflator 8 is activated when the inflator activation requiring information is received from the rollover sensor 133, and then generates information about the time point (activation completing information) as the rollover detection system 13 detects the rollover, and outputs the activation completing information to the comparing section 10. Alternatively, the rollover sensor 133 can be designed to input the output of the rollover sensor 133 directly to the comparing section 10.
On the other hand, the simulator 9 calculates a judgment reference time point for starting a detection operation of a rollover on the basis of the angular speed information given from the angular speed processing section 63 and the acceleration information given from the acceleration processing section 64. The judgment reference time point is a time point at which the occurrence of the rollover is expected. And also the simulator 9 calculates a time period, i.e., a judgment reference time period from the start time of the test to the rollover judgment reference time point as calculated. Judgment reference time period information about the above judgment reference time period as calculated is generated and outputted to the comparing section 10. The judgment reference time point is an optimum time point to detect the rollover of the vehicle. For example, in the case of the rollovers as illustrated in Fig. 3 to Fig. 5, the rollover judgment reference time point is a predetermined time before a time tO has elapsed since the start time of the test. In the case of the rollovers as illustrated in Fig. 6 to Fig. 8, the rollover judgment reference time point is a predetermined time before a time t3 has elapsed since the start time of the test. In the case of the rollovers as illustrated in Fig. 9 to Fig. 11, the rollover judgment reference time point is a predetermined time before a time t4 has elapsed since the start time of the test.
Verification Section
The comparing section 10 provided in an verification section 15 performs the following process on the basis of the timer information given from the timer 62, the activation completing information given from the inflator 8 as rollover detection information, and the judgment reference time period information given from the simulator 9.
The above timer information and the activation completing information are used to calculate the time period from the start time of the test to the time point when the inflator 8 is activated, i.e., the time period from the test start time point to the time point when the rollover detection system 13 detects the rollover. The judgment reference time period information is used to compare the above time period as calculated with the judgment reference time period as calculated by the simulator 9.
As a result, in a case where these time periods substantially agree with each other, i.e., the time point when the rollover detection system 13 detects the rollover agree with the rollover judgment reference time point as calculated by the simulator 9, the information indicative of the agreement is generated and output to the judging section 11. On the other hand, when these time periods do not agree with each other, information indicative of the disagreement is generated and output to the judging section 11. The judging section 11 provided in the verification section 15 determines that the rollover detection system 13 operates normally when the information indicative of agreement is given by the comparing section 10, or that the rollover detection system 13 is out of order when the information indicative of disagreement is given. The display 12 visualizes the result of judgment by the judging section 11 in a screen.
The Procedure of the Test
The procedure of the test by the testing apparatus 1 will be explained with reference to Fig. 1 and Fig. 2. The operator mounts the rollover detection system 13 under test on the rotatable plate 71 as illustrated in Fig. 1, and connects the rollover sensor 133 of the rollover detection system 13 with the inflator 8 of the testing apparatus 1. The operator also connects the input of the A/D converting section 134 with the output of the interface 67.
After the testing apparatus 1 starts its operation, the input section 5 determines a rollover type and a vehicle type in which the rollover detection system 13 is to be installed according to the input manipulation by the operator.
The input section 5 generates the decision information relating to the vehicle type and the rollover type and outputs the information to the trigger output section 51, the angular speed processing section 63 and the acceleration processing section 64 as shown in Fig. 2. The trigger output section 51 generates the trigger information when the decision information is given from the input section 5, and outputs the information to the timer 62, the angular speed processing section 63 and the acceleration processing section 64. The timer 62 measures the current time elapsing from the time when the trigger information is given from the trigger output section 51, and outputs the timer information about the time as measured to the angular speed processing section 63, the acceleration processing section 64 and the comparing section 10.
The angular speed processing section 63 acquires from the memory 61 the angular speed information corresponding to the above decision information on the basis of the decision information given from the input section 5, and outputs the information to the simulator 9. The acceleration processing section 64 acquires the acceleration information from the memory 61 corresponding to the above decision information on the basis of the decision information given from the input section 5, and output the acceleration information to the simulator 9.
The angular speed processing section 63 sets the start time of the test to a time point when the trigger information is given from the trigger output section 51. While determining the current time point on the basis of the timer information given from the timer 62, the angular speed information corresponding to the current time point as determined is acquired from the memory 61 among the angular speed information corresponding to the above decision information and output to the drive section 65.
In the same manner as described above, the acceleration processing section 64 sets the start time of the test to a time point when the trigger information is given from the trigger output section 51. While determining the current time point on the basis of the timer information given from the timer 62, then the acceleration information corresponding to the current time point as determined is acquired from the memory 61 among the acceleration information corresponding to the above decision information and output to the D/A converting section 66.
The simulator 9 calculates a rollover judgment reference time point and a judgment reference time period on the basis of the angular speed information given from the angular speed processing section 63 and the acceleration information given from the acceleration processing section 64. The judgment reference time period information corresponding to the judgment reference time period as calculated is generated and output to the comparing section 10.
The drive section 65 controls the servo motor 7 on the basis of the angular speed information given from the angular speed processing section 63.
The D/A converting section 66 performs the D/A conversion of the acceleration information received from the acceleration processing section 64 and outputs the acceleration information as D/A converted to the connectors 67, while the acceleration information as given from the D/A converting section 66 is output to the A/D converting section 134 through the interface 67. The servo motor 7 rotates the rotatable plate 71 and the rollover detection system 13 in accordance with the angular speed information given from the drive section 65. That is, the information output section 6 gives the above angular speed information to the rollover detection system 13 through the servo motor 7.
In the next, the angular speed sensor 131 of the rollover detection system 13 detects the angular speed of the above rotation as angular speed information, and outputs the angular speed information as detected to the A/D converting section 132. The A/D converting section 132 performs the A/D conversion of the angular speed information given from the angular speed sensor 131, and outputs the angular speed information as converted to the rollover sensor 133.
The A/D converting section 134 performs the acceleration information received from the interface 67, and outputs the acceleration information as converted to the rollover sensor 133.
As a result, the rollover sensor 133 determines whether there is an occurrence of the rollover of the vehicle on the basis of the angular speed information given through the A/D converting section 132 and the acceleration information given through the A/D converting section 134. After determining whether there is an occurrence of the rollover of the vehicle or not, the rollover sensor 133 generates the inflator activation requiring information and outputs this information to the inflator 8. The inflator 8 is activated in response to the inflator activation requiring information given from the rollover sensor 133, then generates activation completing information and outputs this information to the comparing section 10. The comparing section 10 performs the following process on the basis of the timer information given from the timer 62, the activation completing information given from the inflator 8, and the judgment reference time period information given from the simulator 9. The above timer information and the activation completing information are used to calculate the time period from the test start time point to the time point when the inflator 8 is activated, i.e., the time period from the start time of the test to the time point when the rollover detection system 13 detects the rollover. Then, the judgment reference time period information is used to compare the above time period as calculated with the judgment reference time period as calculated by the simulator 9.
As a result, if the time point in which the rollover detection system 13 detects the rollover substantially agrees with the rollover judgment reference time point as calculated by the simulator 9, the information indicative of the agreement is generated and output to the judging section 11. Conversely, if the time point does not substantially agree with the rollover judgment reference time point as calculated, disagreement information is generated and output to the judging unit 11.
The judging section 11 determines that the rollover detection system 13 is normal in a case where the agreement information is given by the comparing section 10, and that the rollover detection system 13 is out of order in a case where the disagreement information is given. The above result of judgment is visualized in the screen of the display device 12.
As described above, according to this embodiment, the information output section 6 gives angular speed information and acceleration information to the rollover detection system 13 which then detects the rollover of a vehicle on the basis of the angular speed information and the acceleration information as given.
On the other hand, the simulator 9 calculates a judgment reference time point, at which the above rollover is detected, on the basis of the same angular speed information and the acceleration information output from the information output section 6.
The verification section 15 (judging section 11) judges that the rollover detection system 13 is normal in a case where the time point when the rollover detection system 13 detects the rollover substantially agrees with the above rollover judgment reference time point.
Effects of Invention
Accordingly, it is possible to determine whether or not the rollover detection system 13 is in a normal operation on the basis of angular speed information and acceleration information, and therefore to determine whether or not the rollover detection system 13 is in a normal operation with a higher degree of accuracy.
Since the information output section 6 outputs the angular speed information and the acceleration information as acquired by actually overturning the vehicle in which the rollover detection system 13 is to be installed, it is possible to determine whether or not the rollover detection system 13 is in a normal operation in the same situation as the rollover detection system 13 actually installed in the vehicle. Accordingly, also from this view point, it is possible to determine whether or not the rollover detection system 13 is in a normal operation with a higher degree of accuracy. The rollover detection system 13 is provided with the angular speed sensor 131. The rollover detection system 13 is rotated by the testing apparatus 1 in accordance with the angular speed information output from the information output section 6, and the angular speed sensor 131 detects the angular speed of the above rotation to output the above angular speed information to the rollover sensor 133. According to those configuration, it is also possible to determine whether or not the angular speed sensor 131 is in a normal operation.
In the case of the above embodiment, the acceleration information is outputted directly to the rollover sensor 133 without the intervention of the acceleration sensor. Accordingly, it is possible to manufacture the testing apparatus 1 in a compact size and with ease at a low cost.
The memory 61 is used to store angular speed information and acceleration information as one set of information provided for each of rollover types and vehicle types (inclusive of the vehicles in which the rollover detection system 13 are installed as well as other rollover types), while the information output section 6 acquires from the memory 61 the angular speed information and the acceleration information corresponding to the input manipulation of the input section 5, and output this information. Accordingly, the testing apparatus 1 can make use of the appropriate set of information corresponding to a rollover type and a vehicle type in which the rollover detection system 13 is installed, in order to determine whether or not the rollover detection system 13 is in a normal operation. In other words, it is possible to determine whether or not the rollover detection system 13 is in a normal condition on the basis of the adjustment of the rollover detection system 13. While the rollover detection system 13 is rotated in accordance with the angular speed information outputted from the information output section 6 in order to output the above angular speed information to the rollover sensor 133 in accordance with this embodiment, it is also possible to provide an additional D/A converting section, and connect the angular speed processing section 63 with the rollover sensor 133 through the additional D/A converting section and the A/D converting section 132 in order to output the above angular speed information to the rollover sensor 133 through the additional D/A converting section and the A/D converting section 132. In this case, it can be determined whether or not the rollover detection system 13 is in a normal operation after removing the angular speed sensor 131 from the rollover detection system 13.
Although the invention has been described above by reference to certain embodiments of the invention, the invention is not limited to the embodiments described above. Modifications and variations of the embodiments described above will occur to those skilled in the art, in light of the teachings. The scope of the invention is defined with reference to the following claims.

Claims

1. A testing apparatus configured to test a rollover detection system for vehicle having an angular speed sensor, an acceleration sensor and a detecting section detecting an occurrence of a rollover according to angular speed information and angular speed information as detected, the testing apparatus comprising: an information output section generating angular speed information and acceleration information and outputting the angular speed information and the acceleration information to the rollover detection system; a calculation section calculating a reference time point at which an occurrence of a rollover is expected according to the angular speed information and the acceleration information as generated; and an verification section for verifying the rollover detection system determining that the rollover detection system is in a normal operation in a case where the time point at which the rollover detection system detects an occurrence of a rollover substantially agrees with the reference time point.
2. The testing apparatus of claim 1 wherein the angular speed information and the angular speed information are generated on the basis of angular speed information and acceleration information which are acquired in a case where a particular type of vehicle is overturned in accordance with a particular type of rollover.
3. The testing apparatus of claim 1 further comprising a rotating mechanism configured to give the angular speed information being generated by rotating the rollover detection system to the rollover detection system.
4. The testing apparatus of claim 2 further comprising a rotating mechanism configured to give the angular speed information being generated by rotating the rollover detection system to the rollover detection system.
5. The testing apparatus of claim 1 wherein the information output section outputs angular speed information to the detecting section instead of the angular speed information output from the angular speed sensor.
6. The testing apparatus of claim 2 wherein the information output section outputs angular speed information to the detecting section instead of the angular speed information output from the angular speed sensor.
7. The testing apparatus of any one of claims 1 to 6 wherein the information output section outputs acceleration information to the detecting section instead of the acceleration information output from the acceleration speed sensor.
8. The testing apparatus of claim 7 wherein the acceleration information being outputted from the information output section is outputted to the detecting section in the form of analog signals.
9. The testing apparatus of claim 2 wherein the angular speed information and the acceleration information as acquired are stored in the storage device as one set of information.
10. The testing apparatus of claim 9 wherein a plurality of information sets including the angular speed information and the acceleration information as acquired for a plurality of vehicle types or a plurality of rollover types are stored in the storage device, and one of the sets is selectively used.
PCT/JP2004/002933 2003-03-07 2004-03-05 Testing apparatus for testing a rollever detection system WO2004079374A1 (en)

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