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Driving simulator

  • US 4,383,827 A
  • Filed: 07/02/1980
  • Issued: 05/17/1983
  • Est. Priority Date: 07/02/1979
  • Status: Expired due to Term
First Claim
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1. A device for the simulation of a ride on a curved road using a screen of a monitor for the picture of the road perspectively observed by the driver, as well as using a program for the generation of the road picture, as well as using control devices such as accelerator pedal, brake pedal, clutch pedal, gear shift lever and steering wheel, which devices influence the road picture, as well as using several light spot pair generators, means for generating a speed signal with a voltage-frequency converter supplying a base pulse, a speed proportional signal generator, a digital curve sequence generator, several standard curve function generators, a curve sequence program generator, means for determining the curvature of the road, the track angle and the parallel track position, a curvature function generator and a distance program generator, as well as using a device for signal combination, as well as using image generators for the front part of the vehicle and for simulated partner vehicles, said device comprising in combination:

  • (a) a plurality of range wedge generators, including right, left, outside, inside and intermediate range wedge generators, each of which generators within limits an intermediate wedge shaped area and an intermediate band each of which includes;

    at least one integrated digital random access memory component including an adding device and a subtraction device having output signals, for storing reference signals processed by the individual range wedge generator and which is supplied for a short period only;

    two comparators in which the outputs of the subtraction device and the adding device are compared;

    two AND-gates to which the positive carry bit of the adding device is supplied for the prevention of double pictures at overflow;

    two further AND-gates to which the negative carry bit of the subtraction device is supplied;

    two further AND-gates the inputs of which being the equal outputs of the two comparators and the outputs of which being the output of the range wedge generator; and

    a further AND-gate, one input of which being the output of the comparator for the right range wedge limit and for the left range, and the other input of which being the output of the comparator for the left range wedge limit and for the right range, and the output of which being the video signal for the range wedge area, all range wedge generators being equal;

    (b) ceiling area pair generators for the representation of a nearly rectangular area being parallel to the road plane and to the axis of the road;

    each of which includes;

    a random access memory for storing a line select signal for the nearly rectangular area; and

    AND-gate in which the signal supplied by a range wedge generator for the outside range wedge of the ceiling pair, is combined together with the signal supplied by a range wedge generator for the inside range wedge of the ceiling pair and which is inverted in an inverter, into a double wedge shaped ceiling stripe pair to produce a signal accordingly;

    (c) plate area signal generator means, for the repesentation of rectangular lined areas which are vertical to the road plane and perpendicular to the axis of the road;

    each of which includes;

    a first random access memory for storing the upper line signal of all plate areas;

    a second random access memory for storing the lower line signal of all plate areas, a flip-flop supplying a plate area beam signal which is set by the upper line signal and reset by the lower line signal;

    four random access memories each storing outputs of the two range wedge generators defining the upper plate area corners when the signal for the upper line of the plate area pair is positive;

    (d) wall area generators, for the representation of nearly rectangular areas which are vertical to the road plane and to the axis of the road;

    each of which includes;

    a first random access memory for storing the line for the upper far corner of the wall areas;

    a second random access memory for storing the line for the upper near corner of the wall areas these memories being updated at the beginning of every monitor line for the height level of the upper wall area limit;

    four random access memories each storing outputs of the range wedge generator defining the upper limit of the right and the left wall areas when the signals for the lines of the far and the near upper corners of the wall area pairs are positive;

    (e) random access memories for the abscissas of the vertical rows for a certain number of lines, which store these abscissas as trunk abscissas until the next area pair appears said next area pair being either wall or plate area pair signals;

    (f) rectangle generators for supplying the horizontal and vertical signals for the rectangular areas;

    each of which includes;

    four random access memories which store the horizontal and vertical values for the left, and for the right limits,two comparators each in pairs for comparing the horizontal and vertical outputs for the rectangular areas;

    (g) a write-read memory for storing the abscissas for the middle of the road, the line select signals, and the rectangle coordinates, which is written by a speed proportional signal generator and a buffer for the writing process therewith;

    (h) a multiplying device for supplying the width signals; and

    (i) a generator means for supplying pulses for the height presetting, to said multiplying device for the width presetting, according to the individual height and width factor of one range wedge;

    the generator means including a device for the logical selection of the write/read pulse.

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