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1.发明授权
公开(公告)号：US4775847A
公开(公告)日：1988-10-04
申请号：US939822
申请日：1986-12-09
摘要： A tunable resonant cavity filter structure is disclosed which includes an enhanced ground return internal to the cavity which effectively eliminates generation of deterioration wide band noise and optimizes unloaded Q as well as rending resonant frequency stable with vibration. In its preferred form, the enhanced ground return is in the form of a ground return clip with reliant radial projections that mate with the threads of the threadable tuning element used to determine final operating frequency. The radial projections are deflected in cantilever fashion so as to generate sufficient pressure to break thru any oxides in the tuning element threads and ensure metal-to-metal contact.
摘要翻译： 公开了一种可调谐谐振腔滤波器结构，其包括在空腔内部的增强的接地回路，其有效地消除了恶化宽带噪声的产生，并且优化了无负载的Q以及使振荡时谐振频率稳定。 在其优选形式中，增强的接地返回是具有依赖的径向突起的接地返回夹的形式，所述径向突起与用于确定最终操作频率的可螺纹调谐元件的螺纹配合。 径向突起以悬臂方式偏转，以便产生足够的压力，以破坏调谐元件螺纹中的任何氧化物并确保金属与金属的接触。
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公开(公告)号：US07741977B2
公开(公告)日：2010-06-22
申请号：US11957733
申请日：2007-12-17
CPC分类号： G08G1/0104
摘要： A method and apparatus for calculating the travel time of a vehicle as it transits through multiple locations. The method and apparatus includes a device for detecting a radio signal from a vehicle, attaching information to the radio signal, and transmitting a message packet with the signal and attached information to a central server. The central server stores the message packet. The central server compares the information in the message packet against other stored message packets received from multiple locations. When matching information is found, an algorithm is run to compute a vehicle travel time between two locations.
摘要翻译： 一种用于计算车辆经过多个位置的行驶时间的方法和装置。 该方法和装置包括用于检测来自车辆的无线电信号的装置，将信息附加到无线电信号，以及将具有信号和附加信息的消息分组发送到中央服务器。 中央服务器存储消息包。 中央服务器将消息分组中的信息与从多个位置接收的其他存储的消息分组进行比较。 当找到匹配信息时，运行算法来计算两个位置之间的车辆行驶时间。
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公开(公告)号：US20090153364A1
公开(公告)日：2009-06-18
申请号：US11957733
申请日：2007-12-17
IPC分类号： G08G1/123
CPC分类号： G08G1/0104
摘要： A method and apparatus for calculating the travel time of a vehicle as it transits through multiple locations. The method and apparatus includes a device for detecting a radio signal from a vehicle, attaching information to the radio signal, and transmitting a message packet with the signal and attached information to a central server. The central server stores the message packet. The central server compares the information in the message packet against other stored message packets received from multiple locations. When matching information is found, an algorithm is run to compute a vehicle travel time between two locations.
摘要翻译： 一种用于计算车辆经过多个位置的行驶时间的方法和装置。 该方法和装置包括用于检测来自车辆的无线电信号的装置，将信息附加到无线电信号，以及将具有信号和附加信息的消息分组发送到中央服务器。 中央服务器存储消息包。 中央服务器将消息分组中的信息与从多个位置接收的其他存储的消息分组进行比较。 当找到匹配信息时，运行算法来计算两个位置之间的车辆行驶时间。
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