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This paper introduces a kind of intelligent communications dispatch terminal equipment. The equipment is applied to taxi. Its core technology is GSM short message module. The paper describes the overall design of this application in detail. And it studies the power system in terminal blocks, the overall circuit design, short message sending and receiving control. The module of taxi communications...
This design includes two parts, namely sound source transmitting system (mobile car) taking STC89C52 SCM as core control and sound source receiving system taking STC5410AD SCM as core control. This system determines the direction and position of sound source through time delay estimation algorithm, carries out distance localization of sound through phase-lock demodulation of the sound source signal...
The high-tech intelligent transport system is one of the most efficient ways to improve the world transport problems. The paper raised project to transport information system, which is a key problem in ITS. It lucubrated subsystem for information release and raised economic project to wireless data transport. The project saved much cost by modulating baseband signal twice and made the best of network...
In this paper we present a solution of distributed and loose-coupling industry automatic control system based on software bus Internet oriented directly. As the software bus for the hardware and application abstraction we used the LabMap. For the fieldbus I/O modules we took Phoenix Contact I/O systems. For the controlled platform we took MATLAB/Simulink. The solution illustrated in this work provides...
It has become a hot field to research and design the indoor autonomous mobile robot in the past few years. We discusses how to develop the mobile robot experiment platform, using the Cygnal F020 as the controller, the ultrasonic sensor, the collision sensor, and Stepping Motors as well as its drive chip. Consequently, the basic principles of fuzzy control and fuzzy neural networks based on which MATLAB...
Er3+ doped tellurite glasses are promising candidates for potential broadband optical amplier and tunable fiber lasers because of their excellent optical properties. The emission spectrum show that their FWHM around 1.5 ??m is about 50 nm which is almost twice as broad as the corresponding spectrum in silica. The lifetime of the 4I13/2 metastable state is long enough to make these glasses suitable...
Itpsilas a new data business to realize high-speed data transmission over broadcast channel by using traditional broadcast station. To complete this function must rely on the realization of wireless high-speed modem. This paper introduced the character of FX919B and choice of some parameter. It particularly narrated circuit design and programmer about the application of FX919B. This chip realized...
The content of the intelligent transportation system include many aspects of which the key part is to realize the advanced traffic information release system. This system completes the information release mainly through the use of the wireless communication technology. The paper briefly introduces the structural design of the traffic information collection and release system, and puts forward an economic...
Brushless DC motor (BLDCM) has the question of torque ripple and it will influence the motor's running stability. The theory of commutation torque ripple of BLDCM was analyzed firstly. After the study of the stop process of BLDCM, it was proposed that the motorpsilas stop precision will be affected when commutation occurs in the stop interval. Classical overlapping commutation and novel dynamic commutation...
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