Accessibility of special vehicles on urban roads is the fundamental guarantee for dealing with emergencies. On the road in China, especially in the high-speed gate area, special vehicles such as ambulances and fire engines are often blocked. Given the situation in which a particular carcass through the highway, this paper aims to prioritize special vehicles and promote the active concession of social vehicles for special vehicles in space. This paper proposes a method for determining the transfer of special vehicles on highways. For social vehicles in high-speed door areas, the violation of compaction lines caused by avoiding special vehicles can be automatically eliminated, eliminating the concerns of social vehicle drivers, improving the initiative of transferring unique cards, and realizing the priority of special vehicles.
Nowadays, China’s highway charges are manual, semi-automatic (MTC), and electronic toll collection (ETC), and traffic efficiency is relatively low. To improve the speed of highway toll stations, free-flow charging based on the Global Navigation Satellite System (GNSS) is a charging method with higher traffic efficiency. This paper analyzes and designs a sub-meter high-precision lane-level navigation and positioning system based on BeiDou’s ground-based augmentation system. Based on the technical principle of highway free-flow charging, a new mode and method of BeiDou lane-level highway vehicle wide-area free flow trusted charging is designed by adding mobile communication base station verification.
BeiDou Navigation Satellite System is an important national space-time infrastructure and an important tool for realizing social informatization. BeiDou satellite navigation system has been widely used in transportation, hydrology, meteorological monitoring, and other fields since it provides services. At the same time, the BeiDou satellite navigation system also needs to be further applied in ground navigation. Given the domestic situation, the best practice place is the high-speed field, such as the wide plain, highways, and so on, and the focus is to design a low noise, low power consumption, broadband navigation satellite receiver frequency synthesizer. Considering the selection of frequency points and loop bandwidth of the navigation satellite, this paper selects the phase-locked fractional frequency synthesizer. The linear model of the system is established. After introducing noise, the phase noise model of the system can be obtained. In this paper, the 65 nm CMOS process is used to design and realize dual-mode broadband VCO, decimal frequency divider, frequency discriminator, charge pump, automatic frequency band selection circuit, and loop filter. After simulation verification, the design index is completed.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.