How to Calculate Distance to Ultrasonic Sensor (HC-SR04) Arduino Module -The ultrasonic sensors are electronic devices that can change the ability of the electrical energy into mechanical energy in the form of ultrasonic sound waves. The sensor consists of a transmitter circuit and a receiver circuit. This tool is used to measure the ultrasonic waves. Ultrasonic waves are mechanical waves that have characteristics of longitudinal and typically have a frequency above 20 kHz. Waves of Utrasonik can propagate through solids, liquids and gases. Ultrasonic is wave propagation wave energy and mechanical momentum that travels through these elements as interaction with molecules and the nature of the medium in its path enersia.
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| Example: Ultrasonic sensor (HC-SR04) |
HC-SR04 Ultrasonic Sensor detects objects by sending short pulses and then wait for the wave reflection (echo) .Sensor this form of ignition pulses (Trigger pulse) to interface to the device controller (microcontroller) so sending short 40kHz ultrasonic waves by the sensor will wait for instructions of controllers.
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| How to Calculate Distance to Ultrasonic Sensor (HC-SR04) Arduino Module |
The calculation of the time required to receive a Ping sensor module reflection at a certain distance can be calculated using the following equation:
S = the distance between the sensor detected object.
TIN = the time between the transmitting and receiving the reflected waves.
V = the ultrasonic wave propagation speed in air at normal speed 344m / s.
TIN = the time between the transmitting and receiving the reflected waves.
V = the ultrasonic wave propagation speed in air at normal speed 344m / s.
There are 3 prnsip work of an ultrasonic sensor that is, the signal is transmitted through the ultrasonic wave transmitter. Signals emitted will propagate as sound waves at the speed of sound ranging from 344m / s. And the last signal was received will be processed to calculate the distance
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