Main applications:
Ultrasonic sensing technology is used in different aspects of production practice, and medical application is one of its most important applications. The application of ultrasound in medicine is mainly to diagnose diseases, and it has become an indispensable diagnostic method in clinical medicine. The advantages of ultrasound diagnosis are: no pain, no damage, simple method, clear visualization, and high accuracy of diagnosis. Therefore, it is easy to promote and is welcomed by medical workers and patients. Ultrasound diagnosis can be based on different medical principles, and we will take a look at one of the representative so-called Type A methods. This method uses the reflection of ultrasound waves. When ultrasound waves propagate through human tissues and encounter an interface of two media with different acoustic impedances, a reflected echo is generated at that interface. Each time a reflective surface is encountered, the echo is displayed on the oscilloscope's screen, and the difference in impedance between the two interfaces also determines the amplitude of the echo.
In industry, the typical application of ultrasonic is non-destructive testing of metals and ultrasonic thickness measurement. In the past, many technologies were hampered by the inability to detect the inside of an object's tissue, but the advent of ultrasonic sensing technology has changed that. Of course, more ultrasonic sensors are permanently installed on different devices to "silently" detect the signals that people need. In the future, ultrasonic will be combined with information technology and new material technology, and more intelligent and high-sensitivity ultrasonic sensors will appear.
Ultrasonic distance sensor technology application
Ultrasonic waves have a great ability to penetrate liquids and solids, especially in opaque solids, where it can penetrate to a depth of tens of meters.
When the ultrasonic wave encounters impurities or interfaces, it will produce significant reflections and form echoes, and Doppler effects can occur when it touches active objects. Therefore, ultrasonic testing is widely used in industry, national defense, biomedicine, etc.
Ultrasonic distance sensors can be widely used in level (liquid level) monitoring, robot collision avoidance, various ultrasonic proximity switches, and anti-theft alarms and other related fields, reliable work, easy installation, waterproof type, small emission angle, high sensitivity, easy to connect with industrial display instruments, and also provide probes with large emission angles.
Specific applications
1. The ultrasonic sensor can detect the status of the container. When an ultrasonic sensor is mounted on top of a plastic melt tank or plastic pellet chamber and emits sound waves to the inside of the container, it is possible to analyze the container's status, such as full, empty or half-full.
2. Ultrasonic sensors can be used to detect transparent objects, liquids, any dense materials with rough, smooth, and light surfaces, and irregular objects. However, it is not suitable for use outdoors, in extremely hot environments or pressure tanks, and on foamy objects.
3. Ultrasonic sensors can be applied to food processing plants to realize a closed-loop control system for plastic packaging detection. In conjunction with the new technology, it can be used to detect humid rings such as bottle washers, noisy environments, environments with extremely drastic temperature changes, etc. [1]
4. Ultrasonic sensors can be used to detect liquid level, detect transparent objects and materials, control tension and measure distance, mainly for packaging, bottle making, material handling, coal equipment transportation, plastic processing and automotive industry. Ultrasonic sensors can be used to monitor processes to improve product quality, detect defects, determine their presence, and more.
Use ultrasonic sensor technology to prevent the wrong pedal
Nissan Motor has developed a function to prevent the vehicle from accelerating by accidentally pressing the accelerator pedal when the brakes are about to be applied, and when using cameras and ultrasonic sensors to infer that the driver is going to stop in a parking lot, the driver will force the brake if he presses the accelerator. The technology is expected to be put into practical use within 2-3 years. Ultrasonic sensor technology was developed to prevent accidents caused by pressing the wrong brake and accelerator pedal while parking in a parking lot.
The technology is achieved using four cameras equipped on the front and rear of the vehicle, one on the left and right sides of the vehicle, and four ultrasonic sensors on the front bumper and four on the rear bumper. The four cameras are the same as the "surround view display" that displays a bird's-eye view of the vehicle's surroundings. The camera uses a camera to recognize white lines to infer that the car is in a parking lot, and an ultrasonic sensor measures the distance between the car and the surrounding obstacles to determine the timing of braking.
Preventing accidents caused by the wrong brake and accelerator is a two-step process. When the driver wants to stop in the parking lot, if he steps on the accelerator, he first reduces the speed of the vehicle to creep speed, uses the icon on the dashboard to warn of the danger, and sounds the alarm. If the driver continues to press the accelerator and is about to hit an object such as a wall, force the brakes. The braking timing is to ensure that the car can stop when it is about 20-30cm away from the obstacle.
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