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1. 发明授权

US5691959A Stylus position digitizer using acoustic waves 失效
标题翻译：使用声波的触针位置数字化仪
公开(公告)号：US5691959A
公开(公告)日：1997-11-25
申请号：US223897
申请日：1994-04-06
申请人： James A. Kriewall , Edwin F. Johnson , Alan R. Selfridge , John P. Fairbanks , Verne H. Wilson , Robert W. Parry , James D. Cummins
发明人： James A. Kriewall , Edwin F. Johnson , Alan R. Selfridge , John P. Fairbanks , Verne H. Wilson , Robert W. Parry , James D. Cummins
IPC分类号： G06F3/043 , G06F3/033 , G06F3/041 , G06F3/048 , G08C21/00
CPC分类号： G06F3/0433 , G06F3/043 , Y10S367/907
摘要： A digitizer uses acoustic waves originating from a stylus to determine the position of the stylus on a plate. The acoustic waves are introduced into the plate from the tip of the stylus and are detected by a plurality of detectors positioned at various points along the periphery of the plate. By sensing differences in the arrival times of the acoustic waves at the detectors, a microprocessor calculates the position of the stylus. In a preferred embodiment using a non-tethered stylus, four detectors are positioned at the corners of a rectangle, and the time differences are used as addresses in a lookup table, which is programmed to contain x and y coordinates corresponding to the time differences, Different embodiments may detect only the "fast" symmetrical waves or only the "slow" antisymmetrical waves generated in the plate, or may use the arrival times of both types of waves to determine the stylus position.
摘要翻译：数字化仪使用来自触控笔的声波来确定触控笔在平板上的位置。声波从触针的尖端引入到板中，并且通过位于板的周边的各个点处的多个检测器来检测。通过检测检测器的声波到达时间的差异，微处理器计算出触针的位置。在使用非系留触针的优选实施例中，四个检测器位于矩形的角部，并且时差被用作查找表中的地址，其被编程为包含对应于时间差的x和y坐标，不同的实施例可以仅检测“快”对称波或仅检测板中产生的“慢”反对称波，或者可以使用两种类型的波的到达时间来确定触针位置。

2. 发明授权

US4538585A Dynamic ignition apparatus 失效
标题翻译：动态点火装置
公开(公告)号：US4538585A
公开(公告)日：1985-09-03
申请号：US404068
申请日：1982-08-02
申请人： Leonard E. Arguello , Lawrence M. Blaser , Verne H. Wilson
发明人： Leonard E. Arguello , Lawrence M. Blaser , Verne H. Wilson
IPC分类号： F02P3/00 , F02P3/045 , F02P3/05 , F02P3/04
CPC分类号： F02P3/053 , F02P3/0456
摘要： A digital and linear dynamic ignition control apparatus comprising a burn-time counter, a pre-dwell counter, a current limit counter, engine speed detection apparatus, a biasing circuit and an excess current limit circuit is provided for controlling the start of a dwell in each ignition period. In operation, a current limit adjust window is established for each period. The time of the termination of a dwell in the period relative to the current limit adjust window established for the period starts the dwell in the next period relative to the beginning of the next period at a time calculated to optimize engine performance and minimize energy losses. In general, rapid acceleration in a period starts the dwell earlier in the next period to insure adequate charging of the ignition coil. Conversely, rapid deceleration in a period starts the dwell later in the next period to minimize energy losses.
摘要翻译：一种包括燃烧时间计数器，预停留计数器，限流计数器，发动机转速检测装置，偏置电路和过流限制电路的数字和线性动态点火控制装置，用于控制停止时间的开始每个点火期。在运行中，为每个周期建立一个电流限制调整窗口。在相对于该期间建立的当前极限调整窗口的期间内终止停留的时间开始在下一时段相对于下一个周期的开始停留在计算出的时间，以优化发动机性能并最小化能量损失。一般来说，一段时间内的快速加速开始在下一个时间早期停留，以确保点火线圈充分充电。相反，一段时间内的快速减速将在下一个时期内停留，以尽可能减少能量损失。

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