Measuring distance using ultrasonic sensor with raspberry pi python hcsr04. Using a raspberry pi distance sensor ultrasonic sensor hc. The hc sr04 is an ultrasonic distance sensor that can be paired alongside arduino and raspberry pi. In previous tutorials weve outlined temperature sensing, pir motion controllers and buttons and switches, all of which can plug directly into the raspberry pis gpio ports.
The ranging accuracy can reach to 3mm and effectual angle is hcsr04 pdf datasheet. Ultrasonic ranging module hc sr04 provides 2cm 400cm noncontact measurement function, the ranging accuracy can reach to 3mm. As we connect the module to 5v and initialize the input pin, it starts transmitting the sound waves. The ultrasonic receiver would detect the reflected wave and stop the stop timer.
The following guide is universally since it has to be followed irrespective of the type of computational device used. Hcsr04 datasheetpdf list of unclassifed manufacturers. Complete guide for ultrasonic sensor hc sr04 with arduino this article is a guide about the popular ultrasonic sensor hc sr04. Ultrasonic sensor, hc sr04 datasheet, hc sr04 circuit, hc sr04 data sheet. Using a raspberry pi distance sensor ultrasonic sensor hcsr04 for many outdoor projects a distance measurement is necessary or advantageous. It will give a brief explanation of how ultrasonic sensors work in general.
Hcsr04 user guide the transmitter emits a 8 bursts of an directional 40khz ultrasonic wave when triggered and starts a timer. The modules includes ultrasonic transmitters, receiver and control circuit. It will also explain how to wire the sensor up to a microcontroller and how to takeinterpret readings. Complete guide for ultrasonic sensor hcsr04 with arduino. Hc sr04 distance sensor is commonly used with both microcontroller and microprocessor platforms like arduino, arm, pic, raspberry pie etc.
Ultrasonic pulses travel outward until they encounter an object, the object causes the the wave to be reflected back towards the unit. Frequently, a lot of data is generated in projects that run around the clock. It utilizes noncontact technology, with physical contact between the sensor and objects not needed for it to work. The hc sr04 ultrasonic us sensor is an ultrasonic transducer that comes with 4 pin interface named as vcc, trigger, echo, and ground. Etc2, alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors. Hcsr04 is an ultrasonic ranging module that provides 2 cm to 400 cm noncontact measurement function. It is very useful for accurate distance measurement of the target object and mainly works on the sound waves. Hcsr04 user guide part 1 ultrasonic introduction 1. Intelligent blind stick ultrasound visual impairment.
1524 1225 945 543 585 1327 929 854 440 939 869 1072 176 1295 54 158 644 542 88 887 439 984 995 1268 142 638 219 233 1096 434 230 53 827 165 1108 259 878