公开(公告)号：US4112747A

公开(公告)日：1978-09-12

申请号：US797803

申请日：1977-05-17

Applicant: Trevor John Aldridge ,  Alan Howard Lock ,  Robert Martin Alistair Bell

Inventor： Trevor John Aldridge ,  Alan Howard Lock ,  Robert Martin Alistair Bell

IPC: G01M15/00 ,  G01M15/04 ,  G07C3/00

CPC classification number: G07C3/00 ,  G01M15/00 ,  G01M15/046 ,  F02D2200/1015

Abstract: In the case of those rotating components of rotary machines which are cyclically stressed as their rotational speeds are cyclically varied such as aero gas turbine engine components, the cumulative total number of stress cycles which each component receives due to such speed variations is a reliable indication of its elapsed fatigue life. The invention provides a method and a digital circuit arrangement which facilitates real-time recording of the elapsed fatigue lives of such components: a component's rotational speed is continuously monitored and each time the speed cycles through any one of a plurality of predetermined speed bands, a corresponding predetermined number of fatigue life units is added to an accumulating total of such units.

公开(公告)号：US20090133055A1

公开(公告)日：2009-05-21

申请号：US11942268

申请日：2007-11-19

Applicant: Howard Lock

Inventor： Howard Lock

IPC: H04N7/025 ,  H04N7/10

CPC classification number: H04N7/104 ,  G08B27/008 ,  H04H20/59 ,  H04H20/78 ,  H04H2201/70 ,  H04N7/025 ,  H04N21/235 ,  H04N21/6118 ,  H04N21/814

Abstract: An alert message unit for use in a message distribution system is provided. The alert message unit includes an input configured to receive a cable television signal, a processing module in communication with the input, and an alert mechanism. The processing module is configured to locate an alert message, wherein the alert message is embedded within a frequency band of the cable television signal. The processing module is further configured to determine whether the located alert message is addressed to the alert message unit, and activate the alert mechanism if the alert message is addressed to the alert message unit.

Abstract translation: 提供了一种用于消息分发系统中的警报消息单元。 警报消息单元包括被配置为接收有线电视信号的输入，与输入通信的处理模块和警报机制。 处理模块被配置为定位警报消息，其中警报消息嵌入有线电视信号的频带内。 处理模块还被配置为确定所定位的警报消息是否寻址到警报消息单元，并且如果警报消息被寻址到警报消息单元，则激活警报机制。