Optical Reflective Sensor Research Paper
Abstract— The paper addresses the use of optical reflective sensor in the process of testing certain electrical components such as relays, switches, contactors etc. The sensor is stationary and is placed to detect the position of the electrical component that moves on the conveyor belt. Programmable Logic Controller (PLC) programming is used to carry out the process depending on the output indicated by the optical-reflective sensor. PLC programming is used to reduce the tedious wiring and take into account the reduction of power consumption in case the conveyor belt is not used for a certain period of time. The paper brings out an important application of the optical reflective sensor in combination with PLC programming to carry out an effective batch process between the manufacturing and testing process with ease and to save energy. Also using the pipelining concept to save time and increase throughput. Index Terms— Optical reflective sensor, LC (programmable logic controller), conveyor, saves energy and power, reduces manual labor, pitching, counter, pipelining. I. INTRODUCTION Sensors are a vital part of technical systems that help in collecting information about various different parameters of environment …show more content…
We are using the reflective sensor which has a photo-detector and infrared emitter placed next to each other. When an object is in the sensing area, the light emitted is reflected back to the photo detector, hence the amount of light reaching the detector increases. The change in light energy or photo current is therefore used as an input signal in the application such as the one explained in this paper (In the programmable logic controller). Reflective materials that can be used are a metal mirror or an industry-standard reference surface called the Kodak neutral card commonly known as the gray or white card. The white card has a reflection factor of 90 % while the gray card has a factor of 18
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