Stimulation system for realtime synchronization satellite navigation signal in tunnel
A technology for satellite navigation signals and tunnels, which is applied in the field of simulation systems for real-time synchronous satellite navigation signals, can solve problems such as high cost, large monitoring blind area, and inability to automatically discriminate, and achieves the effect of low manual dependence and easy popularization and application.
Active Publication Date: 2015-04-29
理工雷科电子(西安)有限公司
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Problems solved by technology
However, this method needs to transform the vehicle, which is expensive and not easy to popularize and apply.
[0004] In the research and development of the driving status detection system in the tunnel, magnetic induction and video monitoring technologies are widely used in China, and the tunnel status is monitored by manual duty. However, since the monitoring system is not convenient to cover the entire tunnel area and manual monitoring is required, there is a "monitoring blind spot" in this method. Large, unable to automatically identify and report accidents in real time
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[0018] Such as figure 1 As shown, the simulation system for real-time synchronous satellite navigation signals in tunnels of the present invention includes: a receiving unit, a data simulation unit and a signal generating unit. in:
[0019] 1. Receiving unit
[0020] The receiving unit receives the real satellite navigation signal, obtains the original message stream, system time, 1PPS second pulse and 10MHz reference signal from the real satellite navigation signal, and uses it in the data simulation unit and signal generation unit to achieve information synchronization and signal synchronization These two aspects guarantee the purpose of high-precision synchronization between the simulation system and the real navigation system.
[0021] Specifically, the receiving unit uses the receiving antenna installed outside the tunnel to accurately receive real satellite navigation signals and perform low-noise amplification. To obtain the original text stream and system time, and ...
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The invention provides a simulation system for a realtime synchronization satellite navigation signal in a tunnel and belongs to the technical field of satellite navigation. The simulation system achieves safe driving, early warning and monitoring of a vehicle in the long and large tunnel, acquires information such as a running state of the vehicle in the tunnel in real time, provides information guarantee for emergency rescue of an accident in the tunnel, prevents a secondary accident and reduces a major accident risk in the tunnel.
Description
technical field [0001] The invention belongs to the technical field of satellite navigation, in particular to a simulation system for real-time synchronous satellite navigation signals in tunnels. Background technique [0002] As a mountainous country in my country, tunnels have played an active role in shortening driving distance, increasing vehicle speed, and protecting the environment. However, due to the dark adaptation effect of tunnel vision and the particularity of the road and traffic environment, the occurrence of traffic accidents in tunnels is also more prominent. In the tunnel, the satellite navigation signal is blocked, and the on-board satellite positioning device cannot work normally. When the vehicle runs abnormally, the monitoring system cannot detect it in time, and there are serious safety hazards. [0003] For the satellite navigation system, the tunnel is a relatively closed space, and the realization of the satellite navigation in the tunnel can refer ...
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IPC IPC(8): G01S19/11
CPCG01S19/11
Inventor 曾大治李锐白鑫贝张培瑶谢小刚李昭衡
Owner 理工雷科电子(西安)有限公司