公开(公告)号：US07504959B2

公开(公告)日：2009-03-17

申请号：US11737913

申请日：2007-04-20

申请人： John A. Tiwet ,  Cary S. Stone ,  Richard A. Gorny ,  John Chapples ,  Ian Robins

发明人： John A. Tiwet ,  Cary S. Stone ,  Richard A. Gorny ,  John Chapples ,  Ian Robins

IPC分类号： G08B17/10

CPC分类号： G01N33/0063

摘要： A method and apparatus for gas detection uses a sensor such as an electrochemical (EC) cell and includes a feedback control loop to control a pump to establish a first predetermined gas flow rate to the EC cell. The concentration of the gas at the first predetermined flow rate is measured. If the detected concentration exceeds a predetermined Alert value at the first flow rate an Initial Warning without remedial action is generated, and, the system then changes the gas flow rate before an Alarm is indicated. An Alarm is signaled only if the system verifies the first measurement. Preferably the first flow rate is set to optimize the measurement accuracy of the EC cell being used, and the second flow rate is lower than the first. Verification of an Alarm at the first flow rate may be conducted quickly by a quick-reaction process. The controller may periodically cycle the flow rates between the first and second rates for better accuracy and faster verification times.

摘要翻译： 用于气体检测的方法和装置使用诸如电化学（EC）电池的传感器，并且包括反馈控制回路以控制泵以建立到EC电池的第一预定气体流量。 测量在第一预定流速下的气体浓度。 如果检测到的浓度超过第一流量的预定警报值，则产生没有补救措施的初始警告，然后系统在指示警报之前改变气体流量。 仅当系统验证第一次测量时，才会发出报警信号。 优选地，设定第一流量以优化所使用的EC电池的测量精度，并且第二流量低于第一流量。 可以通过快速反应过程快速地进行第一流量的报警的验证。 控制器可以周期性地循环第一和第二速率之间的流量，以获得更好的准确度和更快的验证时间。

公开(公告)号：US07224285B2

公开(公告)日：2007-05-29

申请号：US11029145

申请日：2005-01-04

申请人： John A. Tiwet ,  Cary S. Stone ,  Richard A. Gorny ,  John Chapples ,  Ian Robins

发明人： John A. Tiwet ,  Cary S. Stone ,  Richard A. Gorny ,  John Chapples ,  Ian Robins

IPC分类号： G08B17/10

CPC分类号： G01N33/0063

摘要： A method and apparatus for gas detection uses a sensor such as an electrochemical (EC) cell and includes a feedback control loop to control a pump to establish a first predetermined gas flow rate to the EC cell. The concentration of the gas at the first predetermined flow rate is measured. If the detected concentration exceeds a predetermined Alert value at the first flow rate an Initial Warning without remedial action is generated, and, the system then changes the gas flow rate before an Alarm is indicated. An Alarm is signaled only if the system verifies the first measurement. Preferably the first flow rate is set to optimize the measurement accuracy of the EC cell being used, and the second flow rate is lower than the first. Verification of an Alarm at the first flow rate may be conducted quickly by a quick-reaction process. The controller may periodically cycle the flow rates between the first and second rates for better accuracy and faster verification times.

摘要翻译： 用于气体检测的方法和装置使用诸如电化学（EC）电池的传感器，并且包括反馈控制回路以控制泵以建立到EC电池的第一预定气体流量。 测量在第一预定流速下的气体浓度。 如果检测到的浓度超过第一流量的预定警报值，则产生没有补救措施的初始警告，然后系统在指示警报之前改变气体流量。 仅当系统验证第一次测量时，才会发出报警信号。 优选地，设定第一流量以优化所使用的EC电池的测量精度，并且第二流量低于第一流量。 可以通过快速反应过程快速地进行第一流量的报警的验证。 控制器可以周期性地循环第一和第二速率之间的流量，以获得更好的准确度和更快的验证时间。