Multiplexed solutions to integrate the onboard electronics in the city-bus vehicles
The electrical circuits and installations in buses and coaches are essential for their good working. Drive, braking, suspension, opening door, security and communication systems depend on the electrical system of the vehicle. The disproportionate length of cable (about 4 Km of cables and 100 Kg of weight in a conventional installation), with more of 2,000 connections per vehicle, generates great difficult and the point-to-point links are not an effective solution. The industrial communication networks or fieldbuses are a multiplexed solution for onboard electronics in the public transport buses and coaches. The authors are working in the design and implementation of new modules based on FPGAs (Field Programmable Gate Arrays) to integrate body and chassis functions in the multiplexed solutions from manufacturers.
Fieldbuses education using training systems designed with state-of-the-art technologies
The industrial communication networks or fieldbuses have experienced a great growth due to the complexity achieved by the automation systems in several areas (industrial control, automotive, aircrafts, ships, home automation, etc.). Therefore, it is very interesting and essential to use starter and training systems that can be applied in the educational process of technical degree courses. Thus, students can acquire a practical knowledge about the different fieldbus protocols existing in the market. This paper describes the design of different nodes that constitute a starter and training industrial network with application in the teaching of the CAN (controller area network) protocol. These nodes have been designed and developed by the authors using different state-of-the-art technologies, looking for an educational purpose. The starter and training CAN network that is described in this paper is made up of one monitoring station (protocol analyser), one control module, one device based on the microcontroller 8751, one device based on reconfigurable circuit (FPGA: field programmable gate array) and several input/output devices based on the integrated circuit P82C150 SLIO-CAN.
Can family language policy predict linguistic, socio-emotional and cognitive child and family outcomes? A systematic review
Multilingual families face decisions about the linguistic upbringing of their children. These decisions shape their family language policy (FLP) which potentially impacts the children and their fam...