发明名称 |
Computer controller ball throwing machine |
摘要 |
A new ball throwing machine for ejecting tennis balls comprising an adjustable ball throwing mechanism, a microcomputer controlling the throwing mechanism for programmed stroke sequences, and a remote control unit attached to the microcomputer and having a touch pad keyboard for direct assignment of impact points of the balls and for command selection and, for balls impacting on a center line of a tennis court, the throwing mechanism is controlled for determining a vertical angle and a launching speed of throwing out the balls on basis of linear interpolation between co-ordinates of two check points of the impact of balls, of a training level and a stroke type preselected on the keyboard, and the first check point is a meshing point of a net and the center line of the tennis court, the second check point is a meshing point of a baseline and the center line; for all other balls, also a horizontal angle of throwing out the balls is determined by a simple trigonometric relation, and a memory is provided in the microcomputer for storing the angle and speed data of each impact point.
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申请公布号 |
US5125653(A) |
申请公布日期 |
1992.06.30 |
申请号 |
US19900603268 |
申请日期 |
1990.10.25 |
申请人 |
KOVACS, FERENC;JUHASZ, LASZL O;SZMEJKAL, ATTILA;LIPTAY, RUDOLF |
发明人 |
KOVACS, FERENC;JUHASZ, LASZL O;SZMEJKAL, ATTILA;LIPTAY, RUDOLF |
分类号 |
A63B69/40 |
主分类号 |
A63B69/40 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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