20-08-2012, 03:09 PM
DATA ACQUISITION SYSTEM FOR INTERNAL COMBUSTION ENGINE
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Abstract:
A data acquisition system is a device designed to measure various parameters. The purpose of the data acquisition system is generally the analysis of the data and the improvement in accuracy of measurements. The data acquisition system is normally electronics based, and it is made of hardware and software. The hardware part is made of sensors, signal conditioners & data acquisition card and computer. The data acquisition system increases efficiency of measurement and lowers the cost for test, through easy to integrate software like LabVIEW. With this system, Engineers can use graphical representation to meet their specific needs very different from the conventional and traditional measurements. Additionally, data acquisition system capitalized on the ever- increasing performance of personal computers. In test, measurement, and control, the system experiences up to a 10 times increase in efficiency at a fraction of the cost, in a fraction of time, of traditional measurement system. This Dissertation work involves testing of internal combustion engine using data acquisition system. For this the data is acquired from internal combustion engine and send to computer after required conditioning. The parameters of internal combustion engine which can be measured are speed, load, temperature ,air flow rate , fuel flow rate . The graphical display on the computer screen can be made by using any software like LabVIEW. This is an attempt to develop a Computerized Test Rig for measurements of speed, load, temperature, air flow rate, fuel flow rate using Software like LabVIEW.
INTRODUCTION:
The project involves testing of internal combustion engine with measurement of various parameters using software. For this the data is acquired from internal combustion engine and sent to computer after required conditioning. The entire system is called as data acquisition system.
The parameters which can be measured are speed, load, temperature, and pressure, and vibration, flow of air, water and fuel by suitable sensors. The essential components of the data acquisition system are sensors, signal conditioner, ADC card and computer. The display forms on the computer monitor can be made by using software like LabVIEW. The data acquisition system increases efficiency of measurement and lower the cost for test by using LabVIEW software.
With this system engineers can use graphical representation to meet the specific needs. In test measurement and control, engineers are using DAQ system to experience up to 10 times increase in efficiency at a fraction of the cost in a fraction of the time of traditional measurement system.
Transducers and Sensors
Transducers and sensors provide the actual interface between the real world and the data acquisition system by converting physical phenomena into electrical signals that the signal conditioning and/or data acquisition hardware can accept. Transducers available can perform almost any physical measurement and provide a corresponding electrical output. For example, thermocouples, resistive temperature detectors (RTDs), thermistors, and IC sensors convert temperature into an analog signal, while flow meters produce digital pulse trains whose frequency depends on the speed of flow.
CONCLUSION:
Various internal combustion engine parameters can be measured and can be used for future reference which is the main objective of the system second objective of the system to bring automation to system in order to reduce the human effort and errors due to human interference is also satisfied. Various characteristic graphs can be computerized generated which also increases system efficiency as no human effort.