公开(公告)号：US5950667A

公开(公告)日：1999-09-14

申请号：US54283

申请日：1998-04-02

申请人： Mark R. Nicewonger ,  John W. Clove

发明人： Mark R. Nicewonger ,  John W. Clove

IPC分类号： B23K11/36 ,  G01M3/26 ,  F16K17/20

CPC分类号： B23K11/36 ,  G01M3/26 ,  Y10T137/7726 ,  Y10T137/7761 ,  Y10T137/87161

摘要： An apparatus detects an opening in a fluid flow passageway such as occurs when a resistance welding cap which is cooled by the fluid flow becomes accidently detached from a welding machine. Upon detection of an opening, an air-actuated pinch lever is activated to quickly pinch shut flexible fluid inlet and outlet hoses and thereby shut off the fluid flow. Inlet and outlet flow rate sensors provide periodic outputs to a digital computer which determines directions of inlet and outlet flow acceleration. If either the inlet or outlet acceleration changes direction, a baseline inlet or outlet flow rate is set equal to the corresponding current flow rate value to prevent erroneous opening detection due to normal flow fluctuations. If the inlet and outlet accelerations are in the same direction, the baseline values are similarly updated. If the inlet acceleration is positive and the outlet acceleration is negative, it indicates a probable opening. Another test is made to preclude an erroneous detection by determining if the inlet and outlet flow rates are different from the baseline values by more than a predetermined percentage. If so, a valid opening is indicated and the fluid flow is shut off.

摘要翻译： 一种装置检测流体流动通道中的开口，例如当由流体流冷却的电阻焊接盖从焊机意外地分离时发生。 当检测到开口时，启动气动夹紧杆以快速夹紧柔性流体入口和出口软管，从而切断流体流动。 入口和出口流量传感器为数字计算机提供周期性输出，确定入口和出口流动加速度的方向。 如果入口或出口加速度改变方向，基准入口或出口流量被设置为等于相应的电流流量值，以防止由于正常的流量波动导致的错误开启检测。 如果入口和出口加速度处于相同的方向，则基准值将被类似地更新。 如果入口加速度为正，出口加速度为负，则表示可能的开启。 通过确定入口和出口流量是否不同于基准值超过预定百分比来进行另一个测试来排除错误的检测。 如果是这样，则显示有效的开口并关闭流体流。

公开(公告)号：US06185466B2

公开(公告)日：2001-02-06

申请号：US08944745

申请日：1997-10-06

申请人： Mark R. Nicewonger

发明人： Mark R. Nicewonger

IPC分类号： G05B1101

CPC分类号： G05B19/414 ,  G05B2219/31139 ,  G05B2219/31324 ,  G05B2219/33273 ,  G05B2219/36512

摘要： A distributed digital control system includes a plurality of control modules which are interconnected by a communication link. Each module includes a processor unit for running a control program, and a plurality of system databases which correspond to nodes in the system. Each module further includes a selector such as a Dual Inline Package (DIP) switch for inputting a node number. The program automatically selects the database corresponding to the input node number when the module is powered up. The system preferably utilizes the industry standard LonTalk® protocol, with each database including Standard Network Variable Types (SNVTs) and Standard Configuration Parameter Types (SCPTs) for the respective node. A default database is also stored in each module, which is automatically used by the program if the system databases are not found.

摘要翻译： 分布式数字控制系统包括通过通信链路互连的多个控制模块。 每个模块包括用于运行控制程序的处理器单元和对应于系统中的节点的多个系统数据库。 每个模块还包括用于输入节点号的诸如双列直插封装（DIP）开关的选择器。 当模块上电时，程序自动选择与输入节点号相对应的数据库。 该系统优选地利用工业标准LonTalk协议，每个数据库包括用于相应节点的标准网络变量类型（SNVT）和标准配置参数类型（SCPT）。 默认数据库也存储在每个模块中，如果没有找到系统数据库，程序将自动使用该数据库。

公开(公告)号：US6026838A

公开(公告)日：2000-02-22

申请号：US54234

申请日：1998-04-02

申请人： Mark R. Nicewonger ,  Tommy K. Yiu

发明人： Mark R. Nicewonger ,  Tommy K. Yiu

IPC分类号： B23K11/36 ,  G01M3/26 ,  F16K17/20

CPC分类号： G01M3/26 ,  B23K11/36 ,  Y10T137/0324 ,  Y10T137/7726 ,  Y10T137/7761 ,  Y10T137/87161

摘要： An apparatus detects an opening in a fluid flow passageway such as occurs when a resistance welding cap which is cooled by the fluid flow becomes accidently detached from a welding machine. Upon detection of an opening, an air-actuated pinch lever is activated to quickly pinch shut flexible fluid inlet and outlet hoses and thereby shut off the fluid flow. Inlet and outlet flow rate sensors provide periodic outputs to a digital computer which determines directions of inlet and outlet flow acceleration. If either the inlet or outlet acceleration changes direction, a baseline inlet or outlet flow rate is set equal to the corresponding current flow rate value to prevent erroneous opening detection due to normal flow fluctuations. If the inlet and outlet accelerations are in the same direction, the baseline values are similarly updated. If the inlet acceleration is positive and the outlet acceleration is negative, it indicates a probable opening. Another test is made to preclude an erroneous detection by determining if the inlet and outlet flow rates are different from the baseline values by more than a predetermined percentage. If so, a valid opening is indicated and the fluid flow is shut off.

摘要翻译： 一种装置检测流体流动通道中的开口，例如当由流体流冷却的电阻焊接盖从焊机意外地分离时发生。 当检测到开口时，启动气动夹紧杆以快速夹紧柔性流体入口和出口软管，从而切断流体流动。 入口和出口流量传感器为数字计算机提供周期性输出，从而确定入口和出口流动加速度的方向。 如果入口或出口加速度改变方向，基准入口或出口流量被设置为等于相应的电流流量值，以防止由于正常的流量波动导致的错误开启检测。 如果入口和出口加速度处于相同的方向，则基准值将被类似地更新。 如果入口加速度为正，出口加速度为负，则表示可能的开启。 通过确定入口和出口流量是否不同于基准值超过预定百分比来进行另一个测试来排除错误的检测。 如果是这样，则显示有效的开口并关闭流体流。