DESIGN AND CONSTRUCTION OF A MICROCONTROLLER BASED PROXIMITY SENSOR FOR DOORS
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ACKNOWLEDGEMENT
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Opening and closing of doors is always a tedious job, especially in places like shopping malls, hotels and theatres where a person is always required to open the door for visitors.A proximity sensor door is able to detect the presence of nearby someone near the door without any physical contact thereby opening the door.
proximity sensor often emits an electromagnetic field or a beam of electromagnetic radiation (infrared, for instance), and looks for changes in the field or return signal. The object being sensed is often referred to as the proximity sensor's target.
This device is developed by interfacing ultrasonic sensor with Atm microcontroller. Proximity measurement using ultrasonic sensor and ATMEGA328p. In this project object proximity was measured object distance in centimeters without any physical contact, with the help of APDS9022 Ultrasound sensor, ATMEGA328p micro-controller, LCD Display via I2C bus.
CHAPTER ONE
1.0 INTRODUCTION
Proximity Detection Sensors detect and measure reflected infrared (IR) energy to detect the presence of an object or person. The proximity detection devices offer a wide range of performance, with four programmable LED drive currents and IR pulse repetitions. The proximity detection circuitry compensates for ambient light, allowing it to operate in environments ranging from bright sunlight to dark rooms. The wide dynamic range allows operation in short-distance detection applications behind dark glass, such as cell phones. Proximity Detection Sensors can be used for a mechanical switch replacement or to sense human gesturing.
Proximity sensors detect the presence or absence of an object from the door. Proximity Sensors are analog output reflective sensors in a small form factor SMT package that offer a distance detection range near zero to 60mm. Proximity sensors can be used in industrial, automotive and consumer applications.
This project proposes a system of automatic opening and closing of door by using sensors. The ultrasonic sensor emits infrared radiation from a considerable distance and sends it to the microcontroller, commanding the microcontroller to either open the gate or to close it. This sensing signal is fed to a controller to operate a door motor through motor driver. The sensor sends a logical command to open the door. The door automatically closes with a fixed time delay.
- OBJECTIVE OF THE PROJECT
The objective of this work is constructing a device which can be used to detect the presence of nearby objects without any physical contact thereby opening and closing door using ATMEGA328p, ultrasonic sensor and LCD display. That does this by emitting an electromagnetic field or a beam of electromagnetic radiation (infrared, for instance), and looks for changes in the field or return signal.
- PURPOSE OF THE PROJECT
The purpose of this work is to provide a digital means of opening and closing a door detecting someone’s distance without physical contact with the person that approaching the door.
- SIGNIFICANCE OF THE PROJECT
As a student of electrical/electronics engineering, this work has exposed me to know the application and description of many electronics components. It also made me to know that an object can be detected by electromagnetic field without making any physical contact with the object.
- SCOPE OF THE PROJECT
The project is designed to measure the proximity of someone approaching a door by using an ultrasonic transducer. The sensor emits infrared radiation from a considerable distance and sends it to the microcontroller, commanding the microcontroller to either open the door or to close it. This sensing signal is fed to a controller to operate a door motor through motor driver. The sensor sends a logical command to open the door. The door automatically closes with a fixed time delay. This proposed system uses an ultrasonic module interfaced to a microcontroller of ATMEGA328p.
The total time taken from sending the waves to receiving it is calculated by taking into consideration the velocity of sound. Then the distance is calculated by a program running on the microcontroller and displayed on an LCD screen interfaced to the microcontroller. The ultrasonic sensor produces 40 kHz sound waves.
1.5 APPLICATIONS OF THE PROJECT
- Parking sensors, systems mounted on car bumpers that sense distance to nearby cars for parking
- Ground proximity warning system for aviation safety
- Vibration measurements of rotating shafts in machinery
- Top dead centre (TDC)/camshaft sensor in reciprocating engines.
- Sheet breaks sensing in paper machine.
- Anti-aircraft warfare
- Roller coasters
- Conveyor systems
- Beverage and food can making lines
- Mobile devices
- Touch screens that come in close proximity to the face
- Attenuating radio power in close proximity to the body, in order to reduce radiation exposure
CHAPTER FIVE
5.1 CONCLUSION
A proximity sensor often emits an electromagnetic field or a beam of electromagnetic radiation (infrared, for instance), and looks for changes in the field or return signal. The object being sensed is often referred to as the proximity sensor's target. Different proximity sensor targets demand different sensors.
This paper proposes an inexpensive and compact model of proximity detection using ATMEGA328. Depending upon pre-determined data the signals from microcontroller are conditioned and corresponding output pins are checked for correctness This system that has been implemented has shown considerable output that matched our requirement. This was achieved by small and user friendly ATMEGA328.
Proximity sensors can have a high reliability and long functional life because of the absence of mechanical parts and lack of physical contact between sensor and the sensed object.
Proximity sensors are commonly used on smart-phones to detect (and skip) accidental touch-screen taps when held to the ear during a call. They are also used in machine vibration monitoring to measure the variation in distance between a shaft and its support bearing. This is common in large steam turbines, compressors, and motors that use sleeve-type bearings. A proximity sensor adjusted to a very short range is often used as a touch switch.
To address the increasingly broad range of proximity sensing applications IR-based detectors now offer increased functionality, small size, low cost, low power, and high part integration. When used with touchscreen devices, they can also save energy overall by eliminating false triggers that would otherwise wake up a processor and power up a display and backlight. Digi-Key has established an extensive portfolio of IR proximity sensor devices.
CHAPTER TWO: The chapter one of this work has been displayed above. The complete chapter two of "design and construction of a microcontroller based proximity sensor for doors" is also available. Order full work to download. Chapter two of "design and construction of a microcontroller based proximity sensor for doors" consists of the literature review. In this chapter all the related work on "design and construction of a microcontroller based proximity sensor for doors" was reviewed.
CHAPTER THREE: The complete chapter three of "design and construction of a microcontroller based proximity sensor for doors" is available. Order full work to download. Chapter three of "design and construction of a microcontroller based proximity sensor for doors" consists of the methodology. In this chapter all the method used in carrying out this work was discussed.
CHAPTER FOUR: The complete chapter four of "design and construction of a microcontroller based proximity sensor for doors" is available. Order full work to download. Chapter four of "design and construction of a microcontroller based proximity sensor for doors" consists of all the test conducted during the work and the result gotten after the whole work
CHAPTER FIVE: The complete chapter five of "design and construction of a microcontroller based proximity sensor for doors" is available. Order full work to download. Chapter five of "design and construction of a microcontroller based proximity sensor for doors" consist of conclusion, recommendation and references.
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