Interferometric protective system for vehicles
First Claim
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1. An apparatus employing reflection of base band electromagnetic pulses from an object to be detected for activating vehicular protective means in the nearby presence of said object comprising:
- transmitter means for radiating base band electromagnetic pulses to illuminate said object,first and second receiver means spaced apart and symmetrically disposed with respect to said transmitter means for receiving based band electromagnetic pulses reflected from said object,amplifier means,switch means for alternately coupling said first and second receiver means to said amplifier means,tapped delay means having first and second opposed input means respectively responsive to said amplifier means and to the radiation of each base band electromagnetic pulse by said transmitter means,at least one shift register means responsive to a predetermined tape of said tapped delay means intermediate said first and second opposed input means thereof,constant false alarm rate threshold means additionally responsive to said amplifier means,coincidence means responsive to simultaneous outputs of said constant false alarm rate threshold means and said one shift register means, andactuator means responsive to said coincidence means.
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Abstract
A base band transmitter cooperates with dual base band receiver antennas, a single receiver channel, and a tapped delay correlator device for the prevention of vehicular collisions, the configuration effectively narrowing the normally wide base band antenna pattern to span a single predetermined forward traffic lane.
50 Citations
10 Claims
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1. An apparatus employing reflection of base band electromagnetic pulses from an object to be detected for activating vehicular protective means in the nearby presence of said object comprising:
- transmitter means for radiating base band electromagnetic pulses to illuminate said object,
first and second receiver means spaced apart and symmetrically disposed with respect to said transmitter means for receiving based band electromagnetic pulses reflected from said object, amplifier means, switch means for alternately coupling said first and second receiver means to said amplifier means, tapped delay means having first and second opposed input means respectively responsive to said amplifier means and to the radiation of each base band electromagnetic pulse by said transmitter means, at least one shift register means responsive to a predetermined tape of said tapped delay means intermediate said first and second opposed input means thereof, constant false alarm rate threshold means additionally responsive to said amplifier means, coincidence means responsive to simultaneous outputs of said constant false alarm rate threshold means and said one shift register means, and actuator means responsive to said coincidence means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- transmitter means for radiating base band electromagnetic pulses to illuminate said object,
Specification