公开(公告)号：US06625570B2

公开(公告)日：2003-09-23

申请号：US09883794

申请日：2001-06-18

申请人： Joseph J. Pierro, Jr. ,  Timothy B. Mullins ,  James B. Sullivan

发明人： Joseph J. Pierro, Jr. ,  Timothy B. Mullins ,  James B. Sullivan

IPC分类号： G06F1100

CPC分类号： G01N17/02

摘要： A system and method for regulating an adjustable DC supply and continuously and remotely monitoring measurements of reference cell potential and/or current for cathodic protection of a structure is disclosed. Cathodic protection devices use a logic circuit and/or microprocessor based monitor for removing identifiable components and noise from the system to arrive at the DC bias. A method is implemented herein to arrive at the true value of a reference cell potential measurement determined within a sample collection point or window calculated for the reference cell signal while the impressed current is still being applied. This measurement can be compared to a calculated shutdown and is communicated to a central computer accessible via a network such as the Internet. All output is automatically regulated and checked for target window accuracy using an automated voting scheme.

公开(公告)号：US4437056A

公开(公告)日：1984-03-13

申请号：US249581

申请日：1981-03-31

申请人： Joseph J. Pierro, Jr.

发明人： Joseph J. Pierro, Jr.

IPC分类号： B61L3/00 ,  B61L3/24 ,  G01R31/00 ,  G01R15/12 ,  G08B29/00

CPC分类号： G01R31/008 ,  B61L15/0081 ,  B61L3/246 ,  G01R31/00

摘要： An automatic electronic cab signal test set for testing the integrity of a pair of pickup coils and for checking the sensitivity of the amplifier of the cab signal receiver. A mode selector is connected to a clock oscillator which produces clock pulses. The clock pulses are connected to an up/down binary counter which sequentially counts up from zero to a maximum count and then sequentially counts down from the maximum count to zero. The up/down binary counter is connected to a code selector which changes the time constant of an R-C network of a code oscillator. The code oscillator illuminates an idication when the cab signal receiver is under test and modulates the carrier signal of a carrier oscillator. The modulated carrier signal is fed to the input of a constant current source which has its output directly connected to the pickup coils and the amplifier of the cab signal receiver. A low-high switch conditions and powers the test set which goes through a simulated low rail current speed command sequence and then goes through a simulated high rail current speed command sequence.

摘要翻译： 一种用于测试一对拾取线圈的完整性并用于检查驾驶室信号接收器的放大器的灵敏度的自动电子驾驶室信号测试装置。 模式选择器连接到产生时钟脉冲的时钟振荡器。 时钟脉冲连接到向上/向下二进制计数器，其从0到最大计数顺序计数，然后从最大计数顺序递减到零。 上/下二进制计数器连接到代码选择器，该代码选择器改变代码振荡器的R-C网络的时间常数。 当驾驶室信号接收器处于测试状态时，代码振荡器照亮一个空白，并对载波振荡器的载波信号进行调制。 调制的载波信号被馈送到恒定电流源的输入端，恒流源的输出直接连接到拾取线圈和驾驶室信号接收器的放大器。 低电平开关条件并对通过模拟低轨电流速度指令序列进行测试的电源供电，然后通过模拟的高轨电流速度指令序列。