データ通信システム及び乗員保護装置

Title:

データ通信システム及び乗員保護装置

Document Type and Number:

Japanese Patent JP4029744

Kind Code:

B2

Abstract:

A G sensor 31 generates a measuring value by measuring an impact acceleration applied to a vehicle. An A/D converter 32 converts the measuring value into a digital value with a resolution of K bits. A transmission interface 33 compresses the digital value into a compression digital signal of L bits being smaller than K bits. When the digital value is outside a given range from (2^K-2^L)/2 to (2^K+2^L)/2, the compression digital signal is generated by dividing the digital value by 2^(K-L). When within the given range, the compression digital signal is generated without dividing the digital value. The compression digital signal corresponding to the digital value within the given range thereby maintains the resolution of K bits. Thus, even using the single G sensor, a resolution of a compression digital signal can be varied based on a low or high intensity level of G.

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Inventors:

Kumazawa Hidehiko

Application Number:

JP2003062317A

Publication Date:

January 09, 2008

Filing Date:

March 07, 2003

Export Citation:

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Assignee:

株式会社デンソー

International Classes:

G01P15/00; G08C19/00; B60R21/013; B60R21/16; C08C19/00; G06F7/00; H03M7/04; H03M7/30; H04L25/02; B60R21/01; B60R21/0132

Domestic Patent References:

JP2043813A
JP2002046574A
JP58115595A
JP2003040075A
JP6056000A
JP10166993A
JP6097827A

Foreign References:

US5493297
US5621404

Attorney, Agent or Firm:

Kazuyuki Yahagi

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