Raspberry Pi based lap counter for amateur car racing
This article presents the design of a lap counter and timer that can be used in amateur car racing. Main functions of this computer to count laps, measure lap time, vehicle speed and accelerations. The system uses a GPS module, accelerometer and magnetometer sensors.
Control the vehicle flow via GPS monitor center
The purpose of this paper is to develop land vehicle navigation and traffic flow monitoring and a control system which is composed of Global Positioning System receivers and RF beacon communication. The GPS receivers and the other sensors detect the position, velocity, density, and flow rate of the vehicles on a freeway. By collecting these data and transmitting them to a monitor control station, called the center of dispatch, the vehicle traffic can be controlled and traffic congestion can be avoided. Two algorithms are developed for the GPS vehicle traffic flow controller which can estimate the velocity, density and traffic flow of the vehicles in order to ascertain whether the traffic is stable, critical stable or unstable. A backpropagation algorithm feedforward neural network approach is provided which has achieved high efficiency. The probabilistic decision base neural network approach selected to classify the stability of the traffic system got the some results as the feedforward neural network approach. An experiment showed that this system can solve traffic problems.
New Low-Profile Applicators for Local Heating of Tissues
A new type of low-profile applicator is described giving efficient power transfer to tissue with low leakage. It consists of a resonant element spaced from a ground plane by low-loss material having high relative permittivity and some relative permeability. This combination is covered by similar material which can be placed in direct contact with the tissue to be heated, or separated from it by a water bolus as required. Laboratory measurements using phantom materials show that these applicators are well matched and produce well defined and relatively uniform heating profiles. Applicators having maximum dimensions of 3-15 cm covering the frequency range 1000-100 MHz, respectively, are described. Penetration depths of at least 4 cm at 100-200 MHz are achieved. Tests on anesthetised pigs and some clinical assessment have confirmed the usefulness of this compact low-frequency type of applicator and have shown that performance compares favorably with that of other recently reported types. The design can be optimized for treatment of specific sites, and suitable choice of dimensions and electrical characteristics of the layer material allow the low-profile concept to be extended over a wide range of operating frequencies.