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Magnetostrictive ultrasonic transducer is classified as an expanding type. Here is some of the available information on this matter.
This device specializes in producing and receiving ultrasonic waves. These waves are particularly good at operating in liquid media. The transducer converts electrical signals into ultrasonic waves. After that, these waves travel through liquids for various applications. Also, the device transforms the waves back into electrical signals after processing.
The key elements of the expanding type include:
Material Composition
This device uses piezoelectric materials such as ceramics, quartz, and PVDF. Such materials are suitable for transforming electrical energy into ultrasonic wave energy. The waves then propagate through the liquid.
Operating Principle
This transducer operates by generating waves within fluids. It achieves this by applying an electrical signal to its piezoelectric element. Thus, this electrical-to-acoustic conversion creates mechanical waves. It happens when the waves pass through materials that expand and contract.
Construction
The transducer has a robust metal housing meant to keep the internal components intact when exposed to varying liquid pressures. In addition, there is an acoustic matching layer between the piezoelectric element and the transducer's surface.
Applications
Expanding ultrasonic transducers are extensively used in industries for precise liquid level measurements, non-destructive testing, and flow rate assessment in pipelines. They also check the viscosity and density of liquids.
Transduction Process
The transducers produce ultrasonic waves through electroacoustic waves. First, they receive an electrical pulse. After that, the piezoelectric material expands and contracts.
The following information is about the materials used to make a ultrasonic transducer.
These transducers are constructed from piezoelectric ceramic materials, especially lead zirconate titanate (PZT). These kinds of materials have been selected because they can generate electric voltage after mechanical strain.
Transducers are often made with steel and aluminum alloys. Steel housing provides protection to the internal components from tough operating environments and high pressures. People prefer aluminum as a construction material since it offers an ideal balance between weight and strength.
These transducers also have polymeric components, including PVDF (polyvinylidene fluoride). PVDF has excellent piezoelectric properties, making it suitable for producing and receiving ultrasonic waves. People also prefer polymers for their ability to resist coming into contact with different liquids. Such resistance enables them to work effectively in harsh chemical environments.
This transducer uses acoustic cement for bonding piezoelectric elements to metal substrates. The cement ensures optimal ultrasonic energy transfer and isolation.
Rubber components are used in the transducers to provide sealing and prevent moisture and contaminants from interfering with the transducer.
The following are the commercial uses of magnetostrictive transducers.
In NDT, the transducers support the detection of internal flaws and discontinuities in metallic structures and components. These ultrasonic waves can penetrate materials and provide detailed information on their integrity. Buyers also pair them with other equipment, such as ultrasonic thickness gauges.
These transducers are vital for industries that require monitoring the levels of liquids in tanks and vessels. They send out ultrasonic waves that measure the distance to the liquid surface. The waves then provide accurate level measurements.
Manufacturers use these transducers in flow metering applications. Here, the ultrasonic waves measure the flow rates of various liquids and gases. The waves' speed and time taken for the waves to travel through the fluid provide accurate flow rate data.
Transducers boost the effectiveness of cleaning processes in many industries. People often use them to clean intricate parts in medical, automotive, and electronic industries. The ultrasonic waves create cavitation bubbles that penetrate deep into contaminants. This action then provides thorough and efficient cleaning.
These transducers provide ultrasonic sensors used in telecommunication. They play roles in devices like echo cancellers and noise filters. So, they help improve the quality and clarity of transmitted sound signals in communication systems.
In hydrology, these transducers can measure groundwater movement. So, they are important for people conducting geological surveys and managing water resources. They also provide valuable data for ecological studies and flood predictions.
The following are some important factors business owners should consider when getting ultrasonic transducer probes.
Transducers have different outputs, like digital, analogue, or voltage frequency. Business owners should ensure the output type is compatible with the equipment they intend to use. Selecting the right output will ensure they get a precise level measurement.
Transducers are available as non-contact and contact types. Non-contact transducers measure levels with an ultrasonic wave without directly touching the medium. Conversely, the contact type transducer measures precise levels by installing it in the midium. Therefore, selecting an appropriate type will depend on the measurement requirements and medium conditions.
Transducer manufacturers make these devices in varied sizes. Some effective ones for level measurement are in small and tight spaces. Others are in large tanks. Therefore, business owners should get transducers in sizes that can suit their customers' tank sizes for effective performance.
Transducer materials play a huge role in ensuring the device performs effectively. Many manufacturers make the body of these devices using stainless steel except for the ultrasonic wave-emitting part. That is because stainless steel prevents corrosion. Some transducers also have plastic covers for extra protection.
Many ultrasonic transducer level sensors are equipped with temperature ratings to measure liquid safely. Therefore, business owners should get them in various temperature ratings. It will help ensure they effectively cater to their customers' operational needs.
For proper maintenance, wholesalers should conduct periodic inspections of the transducers. They should also clean them after every use to remove any formed deposits. This deposit can interfere with the transducer's functioning. Wholesalers should also perform calibration when needed to ensure the transducers provide accurate measurements.
A variety of factors can affect the lifespan of these devices. Exposure to high temperatures and harmful chemicals will degrade the materials used in making the transducer. Therefore, ultrasonics transducer manufacturers commonly place these devices in environments with temperatures ranging between -40°C - + 80 °C.
Yes, as long as customers choose these devices. In manufacturers, they make some of them with plastic covers. These materials help protect the transducer, especially the stainless-steel part, from corrosion. Moreover, the inner part of the plastic covers contains ceramic and metallic piezoelectric elements. They are usually non-corrosive to increase the lifespan of the ultrasonic transducer.
Customers should consider the medium's characteristics where the transducer will work. Those characteristics include the medium's depth, density, and dielectric constant. Customers also pay attention to the wave frequency and transducer's configuration. In addition, they should ensure the transducer's materials are compatible with the chemicals in the medium.
The latest transducers have temperature compensation features. They help the transducer provide reliable measurements in various conditions. Furthermore, many new high-frequency liquid transducers have explosion-proof housings. Thus, making them ideal for dangerous and harsh environments.
