期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2015
期号：MULTICON
页码：581
出版社：S&S Publications
摘要：In most of the automobiles at present the dashboard consist of speedometer, odometer, temperatureindicator, ammeter, pressure indicator and fuel gages. There is no provision to indicate the load on the vehicle. The loadon the vehicle is measured in a weighbridge. The project, Development of Onboard Weighing System Using Sensor inStatic Truck found success in solving this problem. In this project the load in the vehicle is sensed and displayed in theLCD. In this project the strain gauge is used as a sensing element. Four-strain gauges are bonded on to the chassis atfour different places. Two-strain gauges are bonded on to the front side to sense the front-end load. Two-strain gaugesare bonded on the rear side to sense the rear-end load. The wheat stone bridge is an electrical bridge circuit used tomeasure resistance. The wheat stone bridge is well suited for the measurement of small changes of a resistance. Thestrain gauge change electrical resistance when it is slightly deformed by deflection of chassis. This deformationproduces voltage signal that is proportional to the load. The signal is then used as a measure of weight.The output rangeof strain gauge is in the order of very few millivolts. In order to process that succeeding section it should be of voltagerange. To make it we need an amplifier section where the input is in the order of millivolts and the output is in volts.The amplified analog signal is converted into digital signal wherefore processing transmission and storage purposes itis often convenient to express these variables in digital form. The amplified signal is processed in the microcontroller.By testing and experimental results look up table is formed. For a particular value of voltage there is a particular valueof weight is displayed on the LCD in tonnes.
