Starting device of occupant protective system

• US 8,374,753 B2
• Filed: 01/08/2008
• Issued: 02/12/2013
• Est. Priority Date: 04/09/2007
• Status: Active Grant

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: Yamasaki, Shigenaga, Yamashita, Toshiyuki
• Primary Examiner(s): MANCHO, RONNIE M
• Application Number:
  US12/521,898
• Publication Number:
  US 20100023225A1
• Time in Patent Office: 1,862 Days
• Field of Search: 701/36, 701/45, 701/47, 701/35, 701/49, 280/734, 280/735, 280/282, 280/271, 280/290, 340/665, 340/666, 340/667, 340/671, 180/271, 180/290, 180/282
• US Class Current: 701/45
• CPC Class Codes: B60R 2021/01327 Angular velocity or angular acceleration
• CPC Class Codes: B60R 21/0132 responsive to vehicle motion parameters , e.g. to vehicle longitudinal or transversal deceleration or speed value
• CPC Class Codes: B60R 21/0133 by integrating the amplitude of the input signal
• CPC Class Codes: B60R 21/01332 by frequency or waveform analysis

Abstract

A starting device of an occupant protective system includes an angular velocity or acceleration sensor 11 for detecting the behavior of a vehicle, processing sections 131 and 132 for performing two or more computations using different subtrahends on a physical quantity based on the output from the sensor 11, a comparing section 133 for comparing absolute values of outputs from the processing sections 131 and 132, a selecting section 134 for selecting the output value of the processing sections 131 and 132 with the minimum absolute value, and a decision section 135 for making a decision as to the necessity for starting the occupant protective system in accordance with the output value selected.

Claims

1. A starting device of an occupant protective system comprising:

a sensor for detecting and outputting angular velocity of a vehicle, or acceleration of the vehicle;

at least two processing sections for performing subtractions with different subtrahends on a physical quantity based on the sensor output;

a comparing section for comparing absolute values of outputs from the at least two processing sections;

a selecting section for selecting a minimum absolute value from the absolute values compared by the comparing section; and

a decision section for making a decision as to necessity for starting the occupant protective system in accordance with the selected minimum absolute value.

2. The starting device of the occupant protective system according to claim 1, further comprising an integrating section for integrating the physical quantity, and supplies to the processing sections as their input.

3. The starting device of the occupant protective system according to claim 1, further comprising an integrating section for integrating the minimum absolute value selected by the selecting section, and supplies to the decision section as its input.

4. The starting device of the occupant protective system according to claim 1, wherein the processing sections vary the subtrahends in accordance with the physical quantity based on the sensor output.

5. The starting device of the occupant protective system according to claim 1, wherein the processing sections perform subtractions using fixed subtrahends.