Hardware composition and types of ultrasonic sensors 1

Ultrasonic sensor is a device based on ultrasonic characteristics for distance measurement or object detection, widely used in industrial automation, vehicle detection, robot obstacle avoidance and other fields. They work by emitting ultrasonic pulses and receiving reflected pulses, and determine distance by calculating the round-trip time of ultrasonic waves. This article will provide a detailed introduction to the hardware composition and types of ultrasonic sensors.diode

1、 Hardware composition of ultrasonic sensors

The main hardware components of an ultrasonic sensor include a transmitter, ATTINY44A-SSFR receiver, control unit, and signal processing circuit.diode

1. Transmitter: The transmitter is composed of piezoelectric crystals or piezoelectric ceramics, which can convert electrical energy into sound energy and generate ultrasonic waves. These ultrasonic waves are emitted in the form of pulses, with frequencies typically ranging from 20kHz to 400kHz.diode

2. Receiver: The receiver and transmitter are similar in material and are usually made of piezoelectric materials, which can convert the received ultrasonic signals back into electrical signals. In some designs, the transmitter and receiver may be the same physical unit, capable of both transmitting and receiving ultrasonic waves.diode