초록 ▼

A base band radio speed sensor, for use with the path of travel of the craft whose speed is to be sensed advantageously disposed at right angles to the antenna patterns, utilizes a transmitter flanked by equally spaced receivers for determining the times of passage of the craft with respect to symme

A base band radio speed sensor, for use with the path of travel of the craft whose speed is to be sensed advantageously disposed at right angles to the antenna patterns, utilizes a transmitter flanked by equally spaced receivers for determining the times of passage of the craft with respect to symmetrically disposed receiver antennas.

대표청구항 ▼

Apparatus for measuring the speed of a craft moving along a predetermined path comprising: base band transmitter means disposed adjacent said path for illuminating said craft as it moves past said base band transmitter means, first and second base band receiver means disposed in equally spaced relat

Apparatus for measuring the speed of a craft moving along a predetermined path comprising: base band transmitter means disposed adjacent said path for illuminating said craft as it moves past said base band transmitter means, first and second base band receiver means disposed in equally spaced relation from said base band transmitter means and from said path for producing first and second time-displaced outputs, first NAND gate means responsive for producing an output in the presence of only one of said time-displaced outputs, first and second coincidence means respectively responsive to said time-displaced outputs and also to said first NAND gate output, gate means for producing a timing output initiated by the first of said time-displaced outputs and ended by the second of said time-displaced outputs, clock means for producing clock pulses, counter means for establishing a count of said clock pulses during said timing output, divider means for converting said count into signals representative of the aVerage speed of said craft during said timing output, and first display means for displaying said speed representation independently of the direction of motion of said craft along said path.