Ultrasonic detector of the presence of vehicles or other objects. (Machine-translation by Google Translate, not legally binding)

摘要

"Ultrasonic detector of the presence of vehicles or other objects, characterized by comprising transducer means to emit pulses of compression waves at a predetermined rate and responsive to reflections of said pulses compressive waves from situated surfaces within the path of said pulses greater than one compressive waves to convert electrical energy producing means pulses responsive to said means transducers to produce an electrical pulse each time it has been received by the sensor a predetermined number of pulses compressional waves reflected from a vehicle or other object, storage means responsive to said means producing pulses for accumulating said electrical signals, switch means responsive to said means accumulators to start a demonstration output when the voltage at said accumulator means exceeds a predetermined level And timekeeper means responsive to producers pulses said means to permit maintenance of the manifestation of output produced by the switch means until the expiration of a predetermined interval in the non-reflected pulses of compression waves from said vehicle or other object. (Machine-translation by Google Translate, not legally binding)