Please answere this question for sensor instrumentation cour

Please answere this question for sensor instrumentation course (No hand writing)

Discuss the impact of sensors on improving system performance in selected area. (h2)

Solution

A sensor is a device used for signalling. Sensor has a wide range of applications. Sensors are useful in every field for example in industries sensors are used for lighting or for checking pressure or flow of any liquid or any other thing but one of the major application of sensor in industries is lighting in case of industries the production or the performance of industries depends on lighting as the illumination level falls down in industries than the sensor will sense the illumination level and turns on the lights similarly in  automotive arena the optical sensors are used these sensors are used for turning on running lights (side lights) and turning on the head lights and dipping headlamps automatically and sensing rain on windshields so that wipers can be turned on automatically, and ambient light sensing that matches the brightness of dashboards, and turning on door lamps when the door is not properly closed. Many of the automotive companies are using sensors to make their product (car) more luxury and comfort and also to make vehicle more safety. For example, now a days cars like Mercedes Benz offers “adaptive main beam assist” on its leading models. This technology utilizes a camera, fitted inside the vehicle windshield, to sense the distance to oncoming vehicles and progressively dips the headlights to avoid dazzling them. Rain-sensing wipers are also designed to increase vehicle safety. The technology involved is fairly simple. An infrared emitter is directed from the inside of vehicle on to its windshield at an oblique angle. In dry conditions, the infrared light will pass into the windshield glass and is reflected onto an infrared sensor. This occurs because of the change of refractive index at the junction between the outer glass surface and the air. A clean windshield allows for this reflection to happen, but when its optical properties are altered by being wet, the light is scattered, reducing the amount of infrared light picked up by the sensor and indicating the wetness of the windshield. Inside the vehicle, it is important to be able to match the lighting to the ambient conditions. Ideally, dashboards should brighten and darken as the external conditions change so that the instruments remain equally readable whatever the conditions. The analog-output sensor is mounted in a chip LED surface-mount package and includes a phototransistor whose response to brightness closely matches that of the human eye. This is a critical issue in ambient light sensing, as the response curves of semiconductor detectors do not naturally match those of the human eye.

So therefore sensors have a wide range of applications in their areas.