Title:
METHOD AND DEVICE FOR DETECTING OPERATIONAL FAILURE OF DIGITAL ACCELEROMETER
Document Type and Number:
Japanese Patent JP3053371
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a device and method for testing a digital accelerometer through the use of a sigma-delta(Σ-Δ) converter.
SOLUTION: A sigma-delta analog-to-digital converter 26 is operationally connected an accelerometer 24 which outputs an analog acceleration signal indicating collision acceleration and outputs a pulsewidth-modulated gate enable signal GES with a value indicating acceleration signal. The GES signal is AND- computed with a clock signal and generates a pulse density signal indicating an acceleration signal. A monitor circuit determines whether no less than one pulse density signal is generated when the signal GES is high (FLAG1) or a pulse density signal is generated when the signal GES is low (FLAG2).
Inventors:
John Cyril Pee Hannisco
Karl A Munch
Karl A Munch
Application Number:
JP7347397A
Publication Date:
June 19, 2000
Filing Date:
March 26, 1997
Export Citation:
Assignee:
TRW INCORPORATED
International Classes:
B60R21/00; B60R21/01; G01D3/08; G01D5/244; G01P15/00; G01P21/00; (IPC1-7): G01P21/00; B60R21/00; G01P15/00
Domestic Patent References:
| JP7174779A | ||||
| JP7198414A | ||||
| JP6324071A | ||||
| JP714381U |
Attorney, Agent or Firm:
Kazuo Shamoto (5 outside)