Uctronics Smart Bluetooth Robot Car, Руководство пользователя, Страница: 8 / 42

Smart Bluetooth Robot Car Kit for Arduino
8
www.uctronics.com
The ultrasonic sensor emits the short and high frequency signal. These propagate in the air
at the velocity of sound. If they hit any object, then they reflect back echo signal to the
sensor. The ultrasonic sensor consists of a multi vibrator, fixed to the base. The multi vibrator
is combination of a resonator and vibrator. The resonator delivers ultrasonic wave generated
by the vibration. The ultrasonic sensor actually consists of two parts; the emitter which
produces a 40 kHz sound wave and the detector detects 40 kHz sound wave and sends
electrical signal back to the microcontroller.
Ultrasonic working principle
The ultrasonic sensor enables the robot to virtually see and recognize object, avoid obstacles,
measure distance. The operating range of ultrasonic sensor is 2 cm to 450 cm.
2.2.2 Specification

Working Voltage: 5V DC

Static current: < 2mA

Output signal: Electric frequency signal

Output Voltage: 0V-5V

Sensor angle: <= 15°

Detection distance: 2-450cm

High precision: Up to 0.3cm

Input trigger signal: 10us TTL impulse

Echo signal: output TTL PWL signal

Mode of connection: VCC, trig (T), echo, GND

Using method:
(1) Supply module with 5V
(2) Output will be 5V while obstacle in range, otherwise it will be 0V

Item size: 44x20x15mm