Apparatus and method for sensing a rearward facing child seat

Details Apparatus and method for sensing a rearward facing child seat Apparatus and method for sensing a rearward facing child seat

1996-09-24

1998-07-21

Elms, Richard T.

Electrical transmission or interconnection systems

Vehicle mounted systems

Automobile

180282, 280735, B60R 2100

Patent

active

057838712

ABSTRACT:
An apparatus (32) senses the presence of a rearward facing child restraint seat (34) in a vehicle. A frequency oscillator (80) is used to provide an electrical transmit signal which is applied to an antenna (60). The antenna (60) transmits an electromagnetic (EM) signal (62) which has a frequency and a time duration. An identification tag (54) is securable to the child restraint seat (34) and provides an EM return signal (64) in response to the EM transmit signal (62). The EM return signal (64) has the same frequency as the EM transmit signal (62) and continues past the EM transmit signal. The antenna (60) receives the EM return signal (64) and provides an electrical return signal in response to the EM return signal. A product detector (100) is coupled to receive both the electrical transmit signal and the electrical receive signal for determining the presence of the identification tag (54).

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