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公开(公告)号：US3774217A
公开(公告)日：1973-11-20
申请号：US3774217D
申请日：1973-02-21
申请人： TELE E LECT INC
CPC分类号： B66F11/046 , B66C13/40 , B66C2700/088
摘要： This invention is directed to an improved control system for articulated scaffoldings or mobile aerial towers employing a plurality of hydraulic actuators and an improved electric hydraulic control for operation of the same from a remote source through a portable transmitter and receiver combination. The transmitter includes a plurality of control handles and associated logic equipment to convert analogue directional and speed control signals into binary digital form for transmission by the transmitter on a modulated carrier frequency. The receiver which is mounted at the base of the tower receives the transmission and demodulates the signals converting them from binary digital form to analogue form for the purpose of proportionately energizing control valves operating the hydraulic motor for directional and speed controls of the motor. Included in this system is a bypass control for isolating the hydraulic system whenever the transmitter or receiver is inoperative or any type power failure may be experienced to insure against accidental or undesired movement of the hydraulic actuators thereof. Power is applied to the transmitter with operation of any of the manual controls and with reception of the signal at the receiver, the bypass control is opened allowing hydraulic fluid to flow to the motors for control purposes. The improved control system includes provision for manual override control on the control valves from the receiver site.
摘要翻译： 本发明涉及一种用于铰接式脚手架或移动式空中塔架的改进的控制系统，其采用多个液压致动器和用于通过便携式发射机和接收机组合从远程源操作其的改进的电动液压控制。 发射机包括多个控制手柄和相关联的逻辑设备，以将模拟方向和速度控制信号转换为二进制数字形式，用于由调制载波频率上的发射机进行传输。 安装在塔底部的接收器接收传输并解调将它们从二进制数字形式转换为模拟形式的信号，以便比例地激励操作液压马达的控制阀来进行电动机的定向和速度控制。 在该系统中包括用于在发射器或接收器不工作时隔离液压系统的旁路控制，或者可能经历任何类型的电源故障以确保其液压致动器的意外或不期望的运动。 通过任何手动控制器的操作和接收器处的信号将功率施加到变送器上，旁路控制被打开，允许液压流体流向电动机用于控制目的。 改进的控制系统包括从接收器位置对控制阀的手动超控控制。
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