The HC-SR04 is a widely used ultrasonic sensor, known for its precision and reliability in measuring distances. This sensor utilizes ultrasonic waves to determine the distance to an object by sending out a pulse and measuring the time it takes for the echo to return. With a detection range of 2 cm to 4 meters and an accuracy of up to 3 mm, the HC-SR04 is ideal for various applications such as obstacle avoidance, robotics, parking assistance, and liquid level measurement.
The HC-SR04 operates on a 5V DC supply and consumes a current of 15mA during operation. It features four pins: VCC, GND, Trig, and Echo. The Trig pin sends a pulse to initiate the measurement, while the Echo pin receives the pulse after it bounces back from an object. The duration of the high signal on the Echo pin is proportional to the distance to the object, making it possible to calculate the distance with a simple formula.
Due to its non-contact nature and high accuracy, the HC-SR04 is commonly used in robotics for navigation and collision avoidance. It is also employed in automated parking systems to measure the distance between vehicles and obstacles. Additionally, it can be used in industrial applications for level measurement and in consumer electronics for automatic functions like opening doors or lighting control.
The HC-SR04 is favored for its low power consumption, ease of use, and robust performance. Its ability to provide precise measurements without physical contact makes it suitable for environments where mechanical wear or contamination could be issues. Furthermore, the compact size and simple interface make it easy to integrate into various projects and systems. In conclusion, the HC-SR04 ultrasonic sensor is a versatile and effective tool for distance measurement in numerous applications. Its technical specifications, coupled with its wide range of uses, make it an essential component in the field of electronic sensing and automation.
