公开(公告)号：US4266215A

公开(公告)日：1981-05-05

申请号：US961125

申请日：1978-11-16

申请人： Walter P. Adams

发明人： Walter P. Adams

IPC分类号： H03M1/00 ,  H03K13/00

CPC分类号： H03M1/00 ,  H03M1/305

摘要： Two-phase logic signals from a reversible shaft encoder or like device provide count occurrence pulses and a count direction logic signal to control incrementing and decrementing of a counting means. One count occurrence pulse is omitted each time the count direction changes to avoid errors which otherwise might result. Up counts and down counts occur at the same shaft encoder positions, and the system has high noise immunity.

摘要翻译： 来自可逆轴编码器或类似装置的两相逻辑信号提供计数发生脉冲和计数方向逻辑信号，以控制计数装置的递增和递减。 每当计数方向改变时，省略一个计数发生脉冲，以避免否则可能导致的错误。 在相同的轴编码器位置发生计数和递减计数，并且系统具有高抗噪声能力。

公开(公告)号：US4547844A

公开(公告)日：1985-10-15

申请号：US349652

申请日：1982-02-17

申请人： Walter P. Adams

发明人： Walter P. Adams

IPC分类号： B66F9/075 ,  G05B19/23 ,  B66F9/24

CPC分类号： G05B19/23 ,  B66F9/0755 ,  G05B2219/35439 ,  G05B2219/41092

摘要： A shelf height selector system for a lift truck provides signals to an operator as he raises or lowers a load carriage relative to a storage shelf level selected by a keyboard in order to perform a store or retrieve operation, and automatically stops carriage movement with load forks at the proper elevation. Pulses from an incremental shaft encoder operated by carriage movement are counted to provide an instantaneous elevation signal upon which indications to the operator and control functions depend. A switch on the truck mast is operated by carriage movement to repeatedly recalibrate a register containing the instantaneous elevation signal, obviating any errors should noise affect tallying of encoder counts. An optical sensor carried on the load carriage to sense reflective markers adjacent some shelves also recalibrates the register, obviating positioning errors due to mast deflection and tire wear. Provision of a simple programming arrangement allows storage of shelf heights in a non-volatile random-access memory, affording the advantages of a field-programmable system.

摘要翻译： 用于起重车的搁架高度选择器系统在操作者提出相对于由键盘选择的存放架级别引起或降低负载滑架以便执行存储或恢复操作时向操作者提供信号，并且自动停止带有负载叉的滑架运动 在正确的高度。 计数通过滑架运动运行的增量轴编码器的脉冲被计数，以提供瞬时仰角信号，操作者和控制功能的指示依赖于此。 卡车桅杆上的开关通过滑架运动进行操作，以反复重新校准包含瞬时高度信号的寄存器，避免噪声影响编码器计数的计数。 承载在负载台上的光学传感器用于感测靠近某些货架的反射标记，还可重新校准寄存器，消除由于桅杆偏转和轮胎磨损引起的定位误差。 提供简单的编程安排允许将搁架高度存储在非易失性随机存取存储器中，从而提供现场可编程系统的优点。