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Radio-controlled vehicle with RF noise elimination feature and with ultrasonic anti-collision means insensitive to mechanical shocks
| Details |
Inventors: Suyama, Hisao;
Assignee: Sanyo Electric Co., Ltd. (Moriguchi, JA); Tokyo Sanyo Electric Co., Ltd. (Gunma, JA)
Primary Examiner: Curtis; Marshall M.
Assistant Examiner:
Attorney, Agent or Firm: Sughrue, Rothwell, Mion, Zinn & Macpeak
A radio-controlled vehicle having a steering motor, a drive motor, a drive mechanism, and a direction sensor for receiving an RF signal from a remote station to actuate the drive motor and to control the steering motor to direct the vehicle to the station. Also, an ultra-sonic anti-collision circuit for preventing the vehicle from colliding with any obstacle lying in the way of its travel. The direction sensor includes an integrating circuit to remove noise components from the direction control signal to thereby provide precise control to the drive mechanism. The ultra-sonic anti-collision circuit includes circuits for preventing malfunction of the anti-collision circuit due to mechanical shocks and/or vibrations of the vehicle. |
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DETAILED DESCRIPTION What is claimed is: 1.
A radio-controlled vehicle having a radio frequency receiver for receiving a radio frequency signal transmitted from a transmitter positioned remote from the receiver to control an electric steering motor and a drive motor carried on the vehicle, characterized in that said receiver comprises: a non-directional and a directional antenna, a mixer for mixing signals received by said non-directional antenna and said directional antenna, respectively, said antennae being carried on said vehicle, a detection circuit having an output terminal connected to an output of said mixer, an integrator circuit having an input terminal connected to an output of said detection circuit, at least a pair of flip-flop circuits having input terminals coupled to an output of said integrator circuit, whereby a direction control signal from said integrator circuit is applied to said flip-flop circuits, and means for supplying an output signal of said flip-flop circuits to said steering motor to control the same.
2.
A remote-controlled vehicle having a receiver for receiving a remote-control signal from a transmitter, and characterized by: a sending ultra-sonic vibrator mounted on said vehicle, means for supplying said vibrator with a gated oscillator signal, an oscillator gated by pulse signals having a constant period, and a pulse generator for generating said pulse signals; a receiving ultra-sonic vibrator mounted on said vehicle for receiving echo ultra-sonic energy which is transmitted by the sending ultra-sonic vibrator and reflected by an obstacle; a detection circuit which detects both the echo output of said receiving ultra-sonic vibrator and also a noise component due to shocks exerted on said receiving ultra-sonic vibrator to produce a detected signal; gate means, responsive to the detected signal, for discriminating between the pulse signal and noise components to produce an output signal; and a memory-retaining means actuated by the output signal of said gate means
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