Autonomous vehicle always facing target direction at end of run and control method thereof
First Claim
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1. An autonomous vehicle comprising:
- a chassis including a pair of drive wheels, said chassis traveling and turning towards an arbitrary direction by independent control of the pair of drive wheels,drive means for driving said drive wheels, said drive means driving said drive wheels at a speed according to a trapezoid travel pattern,angle detection means provided at said chassis for detecting a direction of said chassis, andangle correction means responsive to an output of said angle detection means at an end of a travel of a predetermined run indicating difference from a target value for correcting said drive wheels so that the direction of said chassis is corrected by a predetermined amount to be aligned with said target direction.
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Abstract
An autonomous vehicle includes a chassis, pair of drive wheels, a motor for driving these drive wheels, a gyrosensor provided at the chassis for detecting a direction of the chassis, and a travel control unit responsive to an output of the gyrosensor at the end of a travel of a predetermined run indicating difference from a target direction for providing control of the rotation amount of the drive wheels so that the direction of the chassis is corrected by a predetermined amount to be aligned with the target direction. A method of controlling this autonomous vehicle is also disclosed.
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Citations
20 Claims
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1. An autonomous vehicle comprising:
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a chassis including a pair of drive wheels, said chassis traveling and turning towards an arbitrary direction by independent control of the pair of drive wheels, drive means for driving said drive wheels, said drive means driving said drive wheels at a speed according to a trapezoid travel pattern, angle detection means provided at said chassis for detecting a direction of said chassis, and angle correction means responsive to an output of said angle detection means at an end of a travel of a predetermined run indicating difference from a target value for correcting said drive wheels so that the direction of said chassis is corrected by a predetermined amount to be aligned with said target direction. - View Dependent Claims (2)
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3. An autonomous vehicle comprising:
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a chassis including a pair of drive wheels, said chassis traveling and turning towards an arbitrary direction by independent control of the pair of drive wheels, drive means for driving said drive wheels, said drive means driving said drive wheels at a speed according to a trapezoid travel pattern, angle detection means provided at said chassis for detecting a direction of said chassis, and angle correction means responsive to an output of said angle detection means at an end of a travel of a predetermined run indicating difference from a target value for correcting said drive wheels so that the direction of said chassis is corrected by a predetermined amount to be aligned with said target direction, wherein said drive means drives said drive wheels at a speed according to a plurality of types of trapezoid travel patterns having different speeds from each other. - View Dependent Claims (4)
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5. The autonomous vehicle further comprising:
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a chassis including a pair of drive wheels, said chassis traveling and turning towards an arbitrary direction by independent control of the pair of drive wheels, drive means for driving said drive wheels, angle detection means provided at said chassis for detecting a direction of said chassis, and angle correction means responsive to an output of said angle detection means at an end of a travel of a predetermined run indicating difference from a target value for correcting said drive wheels so that the direction of said chassis is corrected by a predetermined amount to be aligned with said target direction, and means for specifying an angle correction mode, wherein said drive means carries out angle correction at a predetermined first control mode when a first angle correction mode is specified, and at a predetermined second control mode different from said first control mode when a second angle correction mode is specified.
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6. A control method of an autonomous vehicle including a pair of drive wheels for running and turning towards an arbitrary direction by independent control of said pair of drive wheels, said control method comprising:
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an angle detection step of detecting a direction of a chassis, a step of determining difference of an output of said angle detection step at an end of a travel of a predetermined run from a target direction, and a step of driving said drive wheels at a speed according to a trapezoid travel pattern so that the direction of said chassis is corrected by a predetermined amount to be aligned with said target direction. - View Dependent Claims (7)
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8. A control method of an autonomous vehicle including a pair of drive wheels for running and turning towards an arbitrary direction by independent control of said pair of drive wheels, said control method comprising:
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a mode specify step of specifying an angle correction mode, an angle detection step for detecting a direction of a chassis, a step of determining difference of an output of said angle detection step at an end of a travel of a predetermined run from a target direction, and a correction step of driving said drive wheels so that the direction of said chassis is corrected by a predetermined amount to be aligned with said target direction in a predetermined first control mode when a first angle correction mode is specified in said mode specify step, and of driving said drive wheels so that the direction of said chassis is corrected by a predetermined amount to be aligned with said target direction in a predetermined second control mode differing from said first control mode when a second angle correction mode is specified in said mode specify step. - View Dependent Claims (9)
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10. An autonomous vehicle comprising:
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a chassis, a pair of drive wheels, a motor for driving said drive wheels at a speed according to a trapezoid travel pattern, a gyrosensor provided at said chassis for detecting a direction of said chassis, and a travel control unit responsive to difference of an output of said gyrosensor at an end of a travel of a predetermined run from a target direction for providing control of a rotational amount of said drive wheels so that the direction of said chassis is corrected by a predetermined amount to be aligned with said target direction. - View Dependent Claims (11, 12, 13, 14)
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15. The autonomous vehicle further comprising:
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a chassis, a pair of drive wheels, a motor for driving said drive wheels, a gyrosensor provided at said chassis for detecting a direction of said chassis, and a travel control unit responsive to difference of an output of said gyrosensor at an end of a travel of a predetermined run from a target direction for providing control of a rotational amount of said drive wheels so that the direction of said chassis is corrected by a predetermined amount to be aligned with said target direction, and an operation unit for specifying an angle correction mode, wherein said motor carries out angle correction in a predetermined first control mode when a first angle correction mode is specified, and for carrying out an angle correction at a predetermined second control mode differing from said first control mode when a second angle correction mode is specified.
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16. An autonomous vehicle comprising:
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a chassis, a motor for driving a pair of drive wheels at a speed according to a trapezoid travel pattern, a travel control unit for controlling said motor, and a gyrosensor provided at said chassis for detecting a direction of said chassis, wherein said travel control unit determines whether an output of said gyrosensor at an end of a travel of a predetermined run differs from a target direction, and when the output differs, provides control of said motor so that the direction of said chassis is aligned with said target direction. - View Dependent Claims (17, 18)
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19. The autonomous vehicle comprising:
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a chassis, a motor for driving a pair of drive wheels, a travel control unit for controlling said motor, and a gyrosensor provided at said chassis for detecting a direction of said chassis, wherein said travel control unit determines whether an output of said gyrosensor at an end of a travel of a predetermined run differs from a target direction, and when the output differs, provides control of said motor so that the direction of said chassis is aligned with said target direction, and wherein said travel of a predetermined run is a turning operation of said autonomous vehicle, wherein a rotating speed of said motor when the output of said gyrosensor differs from said target direction is slower than the speed when said autonomous vehicle is turning.
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20. An autonomous vehicle comprising;
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a chassis including a pair of drive wheels, said chassis travelling and turning towards an arbitrary direction by independent control of the pair of the drive wheels, drive means for driving said drive wheels, said drive means driving said drive wheels at a speed according to a trapezoid travel pattern, angle detection means provided at said chassis for detecting a direction of said chassis and angle correction means responsive to an output of said angle detection means at an end of a travel of a predetermined run indicating difference from a target value for causing said driving means to stop said autonomous vehicle and for correcting said drive wheels so that the direction of said chassis is corrected by a predetermined amount to be aligned with said target direction.
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Specification