Land vehicles – Wheeled – Attachment
Patent
1997-02-10
1998-07-14
Ellis, Christopher P.
Land vehicles
Wheeled
Attachment
36442405, 307 101, 340436, B60R 2132
Patent
active
057792640
ABSTRACT:
A crash detector arrangement comprises a crash sensor(1) in the form of an accelerometer which provides a signal to a micro-processor(2) which uses a first algorithm to determine if the signal is representative of a crash of a predetermined severity and which consequently provides an output(8) rendering a first switch(9) conductive. The output of the accelerometer(1) is provided also to the micro-processor(2) through a high pass filter. This input to the micro-processor is processed by another, different, algorithm determined to differentiate a crash from a signal error in the accelerometer. A second output(7) is generated by the micro-processor which is used to assist in the control of a further switch(13). The two switches(9,13) are in a series connection incorporating a source of power(10) and a resistor(12). When current passes through the resistor, the safety device is activated. The second output(7) of the micro-processor(2) passes through an AND-gate(6) which also receives an input from a threshold detector(4) and from a check circuit(14).
REFERENCES:
patent: 5436838 (1995-07-01), Miyamori
patent: 5546307 (1996-08-01), Mazur et al.
patent: 5587906 (1996-12-01), McIver et al.
patent: 5608628 (1997-03-01), Drexler et al.
patent: 5620202 (1997-04-01), Gray et al.
patent: 5631834 (1997-05-01), Tsurushima et al.
Aubertin Philippe
de Mersseman Bernard
Ellis Christopher P.
Sagem-Autoliv
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