Introduction

Ultrasonic distance meter works on a principle similar to radar or sonar which evaluates attribution of a target by interpreting the echoes from radio or sound waves respectively. Ultrasonic sensors generate high-frequency sound waves and evaluate the echo which is received back by the sensor. Sensors calculate the time interval between sending the signal and receiving the echo to determine the distance to an object.

About Device

The system consists of only one main component, a microcontroller unit that acts as the brain of the system. Input and output components such as transmitter unit, receiver circuit, temperature control, and LCD modules are connected to the system brain. The transmitter generates 40 kHz signals and begins the transmission time together with the process of sending signals. While the signals begin to transmit through the ultrasonic transducer, the microcontroller will capture the starting point of transmission time and hold it until the receiver gets the echo signal back. The signal will contact any obstacle ahead and will bounce back to the receiver circuit. When the signal is back, the receiver must detect the echo signal, process & send it to the microcontroller. The microcontroller will stop the transmission time immediately and will calculate the range using the transmission time and display the range on LCD modules. If the transmit signal cannot touch any obstacle in front of it, or the time is very fast, the system will display an error message on the LCD modules, indicate the range is not suitable for the system.

The formula used:- (speedofsound*time)/2

Speed of sound = 340m/s

Advantages

• Not affected by color or transparency of objects.

• Can be used in dark environments.

• Low-cost option.

• Not highly affected by dust, dirt, or high-moisture environments.

• They have greater accuracy than many other methods at measuring thickness and distance to a parallel surface.

• Their high frequency, sensitivity, and penetrating power make it easy to detect external or deep objects.

• Our ultrasonic sensors are easy to use and not dangerous during operation to nearby objects, people, or equipment.

• Our sensors easily interface with microcontrollers or any type of controller.

Demo Video

All details regarding this device. Watch the full video to know how digital distance meter works in real....

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