发明名称 Accurate time standard for vehicle operation
摘要 Apparatus and method for providing timing control signals for operation of an engine and other devices on a vehicle and/or operation of telecommunications equipment and/or computer equipment on the vehicle. A Satellite Positioning System (SATPS) antenna and receiver/processor receive and process signals from three or more SATPS satellites and determine and issue SATPS-determined timing pulses and time signals that indicate the time associated with each timing pulse. The pulse-to-pulse time separation DELTA tpp of these timing pulses is adjusted to provide a separation approximately equal to a selected pulse separation DELTA tincr. Alternatively, a supplementary timing device provides a sequence of timing pulses with pulse-to-pulse spacing that is adjustable by varying an environmental parameter theta , such as temperature or electrical field, for this timing device. The supplementary timing device pulse-to-pulse separation is determined by the SATPS-determined time signals and the environmental parameter theta is varied so that DELTA tpp becomes approximately equal to a selected value DELTA tincr that can be used for timing signals on the vehicle. The supplementary timing device pulses can also be used where the SATPS-determined time signals and timing pulses are not available. The SATPS may be a Global Positioning System (GPS), a Global Orbiting Navigational Satellite System (GLONASS) or any other suitable satellite-based system.
申请公布号 US5625556(A) 申请公布日期 1997.04.29
申请号 US19950430495 申请日期 1995.04.28
申请人 TRIMBLE NAVIGATION LIMITED 发明人 JANKY, JAMES M.;SCHIPPER, JOHN F.
分类号 G01S1/00;G01S19/29;G01S19/30;G04G7/00;(IPC1-7):G04C11/00;G01S1/24 主分类号 G01S1/00
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