Infrared proximity sensor. .pptx

Sensor

1. Infrared (IR) Promixity Sensors Tahereem Khan Roll no. 15 CSE_C Sem III

2. This is what a IR proximity sensor looks like:

3. 1. An infrared Proximity Sensor is an infrared proximity sensor that emits infrared light and also receives reflected infrared light and feedback on the presence of obstacles ahead. 2. Principle : Infrared transmitter tube is composed of an infrared light-emitting diode moment luminous body, with infrared radiation efficiency of the material (commonly gallium arsenide) made of PN junction, forward bias to PN junction injection current to excite infrared light. 3. The infrared receiver tube is the infrared light signal in electrical signal semiconductor devices, its core component is a special material PN junction, and with the infrared light intensity increasing the current also increases the output analog signal. 4. Infrared proximity sensors are widely used in various applications, from robotics and automation to security systems and mobile devices. They detect the presence or distance of an object by emitting infrared light and measuring the reflected light . What are IR proimity sensors?

4. Characteristics: Features Specification Emitting a beam of infrared, and receiving the reflected beam Features wide range voltage comparator LM393 Adjustable sensitivity Signal output indicator Power: 3.3V ~ 5V Dimension: 39mm × 15.5mm (including the IR LED) Mounting holes size: 3mm Detection range: 2cm ~ 30cm (depending on the obstacle's color, farthest for white) Detection angle: 35° Recommended environment: indoor, to avoid the sunshine effect. Pin No. 1 DOUT: Digital output Pin No. 2 AOUT: Analog output Pin No. 3 GND: Ground Pin No. 4 VCC: Positive power supply (3.3V-5.0V) Pinouts

5. Working of IR proximity sensors: Infrared proximity sensors work on the principle of infrared light reflection. They consist of an infrared light emitter (usually an infrared LED) and an infrared light detector (photodiode or phototransistor). The emitter sends out infrared light, which is reflected by an object in its path. The detector then measures the intensity of the reflected light, which is proportional to the distance between the object and the sensor. The sensor’s output can be either an analog or digital signal, depending on its design and application requirements. Types of Infrared Proximity Sensor: 1.   Reflective Infrared Proximity Sensor 2. Modulated Infrared Proximity Sensor

6. Applications of Infrared Proximity Sensors: Infrared proximity sensors are versatile and find application in various industries and use-cases. Some common applications include: Robotics: Infrared proximity sensors are used in robotic systems for obstacle detection, collision avoidance, and object recognition. They help robots navigate complex environments and interact with objects safely. Automation: In industrial automation, these sensors are used for object counting, conveyor belt control, and product positioning. They ensure accurate and efficient operation of automated systems. Security: Infrared sensors can detect the presence of intruders or unauthorized access in security systems. They are commonly used in access control, surveillance, and alarm systems. Mobile Devices: Smartphones and other mobile devices often use infrared proximity sensors to detect the user’s proximity to the screen, adjusting display brightness and disabling touch input during calls. Advantages: Disadvantages: 1.Non-contact sensing 2. Wide detection range 3. Resistance to environmental factors 4. Fast response time 5. Compact size 1.Variation in accuracy while sensing 2. Limited angular detection 3.Temperature dependence

7. Conclusion Infrared proximity sensors are valuable tools in a wide range of industries and applications, offering non-contact object detection and distance measurement with high accuracy and reliability. Understanding the working principles, types, advantages, and limitations of infrared sensors can help engineers and designers choose the right sensor for their specific application. From robotics and automation to security and mobile devices, infrared proximity sensors continue to play a crucial role in making our world smarter, safer, and more efficient. Thank YOU!