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.
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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 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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