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公开(公告)号：US4945316A
公开(公告)日：1990-07-31
申请号：US367339
申请日：1989-06-16
IPC分类号： G05B15/02 , G05B19/042 , G05D23/24
CPC分类号： G05B15/02 , G05B19/0423 , G05D23/1917 , G05D23/24
摘要： A computer implemented control system which includes interface circuitry by which signal intelligence is taken in to the computer from external devices such as sensors and is fed out from the computer to external devices such as actuators which correctively adjust controlled parameters. An interface circuit for each of the several external devices is made "universal" in that either an analog input, bistate input, analog output, or bistate output device may be connected to any given one of the terminal points. A voltage follower amplifier sends the intelligence signal to an output device through a low-cost diode, with negative feedback taken from the downstream side of the diode. When an input device is elected for a given terminal point, simple program editing assures that the diode will be reverse biased to isolate the amplifier from the input signal path. In addition, inaccuracies in the analog output voltage fed to an output device--arising from contact resistances in a separable connector--are drastically reduced by a dual-path separable connector arrangement which provides two independent circuit connections for the output voltage and for negative feedback.
摘要翻译： 一种计算机实现的控制系统，其包括接口电路，通过该接口电路将信号智能从诸如传感器的外部设备引入计算机，并从计算机馈送到外部设备，例如校正调节受控参数的执行器。 几个外部设备中的每一个的接口电路被制成“通用”，因为模拟输入，双稳态输入，模拟输出或双稳态输出设备可以连接到任何一个终端点。 电压跟随放大器通过低成本二极管将智能信号发送到输出设备，从二极管的下游侧获得负反馈。 当为给定的终端选择输入设备时，简单的程序编辑确保二极管将被反向偏置以将放大器与输入信号路径隔离。 另外，馈送到输出装置的模拟输出电压（由可分离连接器中的接触电阻引起的）的不准确性通过双通道可分离连接器装置大大降低，双路可分离连接器装置为输出电压和负反馈提供两个独立的电路连接。
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公开(公告)号：US4872213A
公开(公告)日：1989-10-03
申请号：US175865
申请日：1988-03-31
IPC分类号： G06F3/05 , G05B15/02 , G05B19/042 , G05D23/24
CPC分类号： G05B19/0423 , G05B15/02 , G05D23/1917 , G05D23/24
摘要： A computer implemented control system which includes interface circuitry by which signal intelligence is taken in to the computer from external devices such as sensors and is fed out from the computer to external devices such as actuators which correctively adjust controlled parameters. An interface circuit for each of the several external devices is made "universal" in that either an analog input, bistate input, analog output, or bistate output device may be connected to any given one of the terminal points. A voltage follower amplifier sends the intelligence signal to an output device through a low-cost diode, with negative feedback taken from the downstream side of the diode. When an input device is elected for a given terminal point, simple program editing assures that the diode will be reverse biased to isolate the amplifier from the input signal path. In addition, inaccuracies in the analog output voltage fed to an output device--arising from contact resistances in a separable connector--are drastically reduced by a dual-path separable connector arrangement which provides two independent circuit connections for the output voltage and for negative feedback.
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