Products FAQ
Ultrasonic sensors are widely used intelligent detection devices that detect objects, measure distances, or detect energy by emitting high-frequency sound waves and analyzing the echo signals. Their working principle is based on time-of-flight measurement or energy attenuation analysis, making them flexibly applicable to various detection scenarios.
1. Distance Measurement (Time-of-Flight Principle)
In this mode, the sensor emits ultrasonic signals, which are reflected back after encountering a target surface or obstacle. By calculating the round-trip propagation time of the echo, the sensor can accurately measure the distance between itself and the target.
Typical Applications:
Material stacking height detection in logistics and warehousing Obstacle avoidance detection in AGV intelligent transport vehicles and robots Liquid level measurement in hydrological and liquid level monitoring systems Object positioning and distance control in automated production lines
2. Energy Detection (Signal Attenuation Principle)
In this application mode, the sensor determines information such as the thickness, state, or flow physical properties of a material by detecting the energy change of the ultrasonic signal after it passes through or is reflected from the medium.
Typical Applications:
Double-sheet (laminated) inspection in lithium battery and printing industries; edge detection and roll-to-roll correction in film, paper, and foil production lines; wind speed and direction monitoring, reflecting airflow characteristics by analyzing signal energy changes caused by airflow.
Key Advantages:
Non-contact real-time detection, safe and reliable; high measurement accuracy and fast response; unaffected by color, light, and material surface characteristics; long service life, strong anti-interference ability, and excellent environmental adaptability.
In summary, ultrasonic sensors not only achieve high-precision distance measurement but also enable energy-based detection and analysis. In automated manufacturing, intelligent logistics, environmental monitoring, and emerging industrial applications, ultrasonic technology is becoming an indispensable core sensing method.
An ultrasonic transducer is the core component of an ultrasonic sensor system. It works by converting electrical energy into high-frequency sound waves (ultrasound), and then converting the returning sound waves back into an electrical signal. This process is achieved using a special material called a piezoelectric element.
Working Principle
Emission:
When an electrical pulse is applied to the piezoelectric element, it vibrates at an ultrasonic frequency, generating sound waves that propagate through air or other media.
Reception:
When these sound waves encounter an object, some of the wave energy is reflected back to the transducer. At this point, the same piezoelectric element works in reverse—the vibration of the reflected wave produces a weak electrical signal proportional to the intensity and time of the echo.
Signal Processing:
The sensor’s internal circuitry measures the time of flight (the time between sending and receiving the sound waves) or analyzes the energy level of the returned signal. This data allows the system to calculate distance, detect the presence of an object, or assess material properties, among other things.
Application Areas
Ultrasonic transducers are widely used in the following areas:
Distance and liquid level measurement in industrial automation Sheet-of-paper detection and edge alignment in printing and film production Obstacle detection and height measurement in logistics and AGV systems Wind speed, direction, and liquid flow rate monitoring in environmental sensing Floor material detection in intelligent robotic vacuum cleaners
Key Advantages
Non-contact measurement, higher safety, and longer service life High accuracy and fast response Reliable operation under various environmental conditions Unaffected by target color, light, or transparency
In short, an ultrasonic transducer is both a transmitter and receiver of ultrasonic energy. By precisely converting electrical and acoustic signals, it enables accurate detection, measurement, and analysis in various industrial and automation applications.
Piezoelectric ceramics are functional materials capable of bidirectional conversion between electrical and mechanical energy using the piezoelectric effect. When a voltage is applied, the ceramic element vibrates mechanically at ultrasonic frequencies; when subjected to external mechanical stress or sound pressure, it converts this physical change into an electrical signal output.
Because of this bidirectional electromechanical energy conversion characteristic, piezoelectric ceramics have become an indispensable core material in ultrasonic devices (such as sensors, transducers, and atomizers).
1. Applications in Ultrasonic Sensors and Transducers
In various ultrasonic detection systems, piezoelectric ceramic sheets are key components responsible for emitting and receiving ultrasonic waves.
Emission:
When driven by an electrical pulse, the piezoelectric ceramic generates high-frequency vibrations, thereby emitting ultrasonic signals that can propagate in media such as air, liquids, or solids.
Reception:
When the echo or reflected sound wave returns, the same ceramic element senses the change in sound pressure and converts it into an electrical signal, enabling data acquisition and analysis.
Typical Applications:
Distance and level measurement in industrial automation Material stacking height detection in logistics and warehousing Obstacle avoidance systems for AGVs and intelligent robots Flow measurement and non-destructive testing (NDT)
Performance Advantages:
High sensitivity and stability, fast response speed, strong durability, and good resistance to environmental interference.
2. Application in Piezoelectric Ceramic Atomizing Sheets
Piezoelectric ceramics are also widely used in ultrasonic atomization equipment, such as atomizers, humidifiers, aroma diffusers, and beauty devices. As a vibration source, they generate microscale mechanical oscillations through high-frequency electrical signal excitation, rapidly atomizing liquids into fine and uniform particles, achieving efficient atomization without heating.
Typical Applications:
Medical atomizers and air humidifiers Aromatherapy and disinfection equipment Industrial humidification and fluid atomization systems
In summary, piezoelectric ceramics are the core energy conversion material for ultrasonic sensors, transducers, and atomization modules. With its high efficiency, reliability, and excellent adaptability to various frequencies and environments, piezoelectric ceramics have become an important foundation for modern ultrasonic sensing, precision measurement, and fluid control technologies.