Universal Ultrasonic Transducer
Universal ultrasonic transducer can be used for under water sonar and proximity measurement in air. It uses the theory of time of flight (ToF), which means the time difference between emitted ultrasound waves and reflected waves from the object, to calculate the distance between the ultrasonic transducer and the object. Furthermore, the difference in the penetration energy of ultrasound waves between a single sheet and multiple sheets can be used for double-sheet detection to determine whether objects overlap. In general, for ultrasonic detection, the object can be detected by ultrasonic transducers regardless of solids, liquids, or powders. The type and nature of the object to be detected are not affected by its shape, material, color, transparency, hardness, etc. Therefore, ultrasonic transducers nowadays are widely used in under water sonar, parking sensor, level sensor, double feed detection and flow meter, etc.
Advantages of Universal Ultrasonic Transducer
In Any Type Of Material
These universal ultrasonic transducers can able to measure in any type of material. They can sense all types of materials.
Not Affected By Temperature
The universal ultrasonic transducers are not affected by temperature, water, dust or any.
Work In A Good Manner
In any type of environment, the universal ultrasonic transducers will work in a good manner.
Measure In High Sensing Distances
It can measure in high sensing distances also.
Why Choose Us
Our Factory
The company has assembled top industry technical talents along with seasoned marketing and management professionals. Leveraging cutting-edge proprietary core technologies, it specializes in researching, developing, and selling high-performance power ultrasonic core components and related complete sets of equipment. With around 2000 square meters of research and production facilities, the company possesses a well-equipped testing center capable of conducting more than 120 types of tests in six categories.
Our Certificate
National high-tech enterprise; GB/T19001-2016/ISO9001:2015 quality management system certification; 23 patents and 3 software copyrights granted.
Production equipment
Three-axis machining center, CNC lathe, high-temperature aging furnace, ultrasonic component analyzer, high-precision oscilloscope, power analyzer, cavitation intensity measurement instrument, spectrum analyzer, laser particle size analyzer, digital bridge, infrared thermal imaging instrument, microscope, laser vibrometer, etc.
Production market
The company's products are widely used in various industries such as new materials, fine chemicals, automotive, and new energy. Since its establishment, it has achieved cumulative sales of over 45 million RMB.
What Are the Types of Universal Ultrasonic Transducer
Linear transducers
The linear arrangement of the piezoelectric crystals have earned these transducers their name. Linear transducers have universal applications and are used for almost all ultrasonic testing. These piezoelectric crystals are rochelle salt, ceramics, and quartz crystals.
Standard transducers
These transducers are also known as convex transducers due to their possession of curved piezoelectric crystals. Where there is a need for in-depth examination, these transducers have been very effective.
Phased array transducers
Having several elements housed within a case, with each functioning separately but as a unit within a larger unit, is the unique feature of the phased array transducer. Sometimes the number of elements can be 16 or as high as 256. Still, their arrangement enables a programmed pattern of pulse projection. The versatility of the phased array transducer is such that it can serve for both contact and immersion inspection, and it can also use different wedge types. More importantly, phased array transducers can test frequencies within 1 and 10 mhz their pulse shapes can be circular, square, or rectangular. Yet they offer numerous benefits, which technicians often attribute to their steering ability and the number of elements functioning as a pulse generator unit. The possibility of sweeping the beam from a single position increases inspection speed, mainly where the test sample has limited space for physical scanning.
Immersion universal ultrasonic transducers
This transducer is suitable for automated inspection as it is very effective when there is a need to carry out a contactless assessment. With the immersion universal ultrasonic transducer, a column of water is often used to project sound energy to the object. The single-element transducer’ s piezoelectric element receives and converts the sound energy to electrical pulses. One advantage of this transducer is its quick coupling speed, which makes it fast for the inspector to carry out their assessment of the test sample.
Dual element universal ultrasonic transducers
For this transducer, two crystal elements are involved (as the name implies) divided into two compartments using an acoustic barrier but within the same container. However, they function differently, with one element producing the sound waves while the other receives the sound signal. Still, the inspector must position both elements in a v-shaped formation for the test sample’ s sound path. Nonetheless, there is an enhancement of the focal zone resolution, which occurs as the sound waves pass under the sample’ s surface. This feature makes this transducer very effective in corrosion measurements, especially for ascertaining the wall thickness left. It is also very effective for inspecting welding quality, porosity, cracks, inclusions, and lamination integrity.
Angle beam universal ultrasonic transducers
The generation and projection of refracted shear waves into the test sample is the purpose of using an angle beam universal ultrasonic transducer for quality assessment tests. Likewise, it can also project a longitudinal wave through a test sample with the help of a wedge. All the same, the sound wave produced is usually at an angle, and it doesn’ t matter if you use an integral or a removable wedge. The standard industrial application of an angle beam universal ultrasonic transducer is for a weld integrity inspection, which requires an angle projection of sound waves. Similarly, it is effective for identifying defects such as cracks and porosity. On the other hand, the available options of wedges needed for this type of transducer are numerous. These wedges include both short-distance wedges and high-temperature befitting wedges. What’ s more, some of the wedges are customizable.
Delay line universal ultrasonic transducer
While this single element transducer pulses and receives the signal through the same element, it is in no way limited in precision. It is designed to work with a delay line which is replaceable but with an introduction of a delay from projection to the reception of the sound waves. This delay improves the near-surface resolution of the waves for increased result accuracy. Some typical applications of the delay line universal ultrasonic transducer include thickness gauging, an inspection of parts with limited access, and flaw detection.
Ultrasonic contact transducer
For testing scenarios in a well-spaced environment without any hindrance to accessing the test sample, a contact universal ultrasonic transducer can come in handy. This transducer comes in direct contact with the test sample and transmits the sound waves through the material surface. However, because it has a single element makeup, it sends and receives signals using the same element. It then converts to electric signals for analysis. Also, it is made to withstand very rugged use as its surface is made with surface-resistant optimized material.
Universal ultrasonic transducers can be divided into transmitters, receivers and transceivers by functions. For the example of a transducer operating at 40 khz, the resonant frequency (fr) of the transmitters are designed at a frequency close to the operating frequency of the applied electrical signal, as shown in figure 3, to optimize the efficiency of emission. On the contrary, designing the anti-resonant frequency (fa) of the receivers close to the received ultrasonic frequency, to optimize the efficiency of reception. The operating frequency of the transceiver is designed to be between the resonant frequency (fr) and the anti-resonant frequency (fa) of the transceiver. The higher the operating frequency of the transducers, the better resolution but shorter detecting range. However, in order to make the generated ultrasonic waves be transmitted efficiently from the piezoelectric ceramic to the object or fluid (e.G., in air or water), the acoustic impedance between the piezoelectric ceramic and the object or fluid must be matched through acoustic matching layers.
For the example of an ultrasonic air transducer, the acoustic impedance of piezoelectric ceramics is about 35 mrayl (106 kg/m2∙s), while the acoustic impedance of air is as low as around 414 rayl (kg/m2∙s). Therefore, the acoustic matching layer becomes a necessary part of the universal ultrasonic transducer, which is placed between the piezoelectric ceramic and air, so that the acoustic impedance of the two can be matched and the ultrasonic energy can be effectively transmitted into air.
The ideal value of acoustic impedance for the matching layer of an ultrasonic air transducer is rayl, which is about 0.122 mrayl, but it is difficult to find materials with acoustic impedance lower than 1 mrayl and durable in nature. At present, the commonly used material for acoustic matching layers is a kind of composite material made of polymer matrix and hollow powder to achieve lower acoustic impedance with reasonable reliability. Depending on applications, universal ultrasonic transducers can be used in either a pitch-catch mode or a pitch-echo mode. It should be noted that universal ultrasonic transducers have ringing characteristics, inherently. When people design universal ultrasonic transducers for proximity measurement, the ringing limits the minimum detection distance. Generally, a damping layer is used to let the universal ultrasonic transducer quickly return to its static state to reduce its ringing.
Application of Universal Ultrasonic Transducer
Use in depth sounding
It involves transmitting acoustic waves into water and recording the time interval between emission and return of a pulse; the resulting time of flight, along with knowledge of the speed of sound in water, allows determining the distance between sonar and target. This information is then typically used for navigation purposes or in order to obtain depths for charting purposes. Distance is measured by multiplying half the time from the signal's outgoing pulse to its return by the speed of sound in the water, which is approximately 1.5 kilometres per second [T÷2×(4700 feet per second or 1.5 kil per second )] For precise applications of echosounding, such as hydrography, the speed of sound must also be measured typically by deploying a sound velocity probe into the water. Echo sounding is effectively a special purpose application of sonar used to locate the bottom. Since a traditional pre-SI unit of water depth was the fathom, an instrument used for determining water depth is sometimes called a fathometer.
Use in medicine
Medical ultrasonic universal ultrasonic transducers (probes) come in a variety of different shapes and sizes for use in making cross-sectional images of various parts of the body. The universal ultrasonic transducer may be used in contact with the skin, as in fetal ultrasound imaging, or inserted into a body opening such as the rectum or vagina. Clinicians who perform ultrasound-guided procedures often use a probe positioning system to hold the ultrasonic universal ultrasonic transducer. Compared to other medical imaging modalities, ultrasound has several advantages. It provides images in real-time, is portable, and can consequently be brought to the bedside. It is substantially lower in cost than other imaging strategies and does not use harmful ionizing radiation. Drawbacks include various limits on its field of view, the need for patient cooperation, dependence on patient physique, difficulty imaging structures obscured by bone, air or gases, and the necessity of a skilled operator, usually with professional training. Owing to these drawbacks, novel wearable ultrasound implementations are gaining popularity. These miniature devices continuously monitor vitals and alert at the emergence of early signs of abnormality.
Use in industry
Ultrasonic sensors can detect the movement of targets and measure the distance to them in many automated factories and process plants. Sensors can have an on or off digital output for detecting the movement of objects, or an analog output proportional to distance. They can sense the edge of the material as part of a web guiding system. Ultrasonic sensors are widely used in cars as parking sensors to aid the driver in reversing into parking spaces. They are being tested for a number of other automotive uses including ultrasonic people detection and assisting in autonomous UAV navigation. Because ultrasonic sensors use sound rather than light for detection, they work in applications where photoelectric sensors may not. Ultrasonics is a great solution for clear object detection and for liquid level measurement, applications that photoelectrics struggle with because of target translucence. As well, target color or reflectivity do not affect ultrasonic sensors, which can operate reliably in high-glare environments. Passive ultrasonic sensors may be used to detect high-pressure gas or liquid leaks, or other hazardous conditions that generate ultrasonic sound. In these devices, ultrasound from the universal ultrasonic transducer (microphone) is converted down to the human hearing range (Audible Sound = 20 Hz to 20 kHz).
Choose Your Custom Universal Ultrasonic Transducer with Full Options
Material
The piezoelectric material of the transducer is a critical factor that you may need to consider since it should consider the uniqueness of the challenges involved. For example, suppose it will be immersed in a liquid, used on a rough surface or high-temperature zone. In that case, the material should withstand the challenges without affecting the accuracy of the result.
Size and dimension
The portability and accessibility of the test sample heavily rely on the shape, size, and dimension of the transducer. A bulky and wide universal ultrasonic transducer might take up so much space and end up unable to access the object under examination, especially in a confined space.
Technology
Certain inspections depend on advanced universal ultrasonic transducer features to achieve the required level of accuracy. As such, using an universal ultrasonic transducer with a base technology will not cut it.
Frequency
Though universal ultrasonic transducers often detect very high frequencies of between 1-10 MHz, a unique need might arise requiring a transducer to detect higher frequencies than 10 MHz and, in some cases, even lower than 1 MHz.
Resonance
universal ultrasonic transducers have different resonant frequencies at which they operate efficiently. However, this will be based on the operation and the transducer in question. Hence, you may need to be clear on this when customizing your universal ultrasonic transducer.
Capacity
With various inspection requirements comes different transducer capacities. The chief determiner of an universal ultrasonic transducer capacity is the frequency it aims to detect. However, most have a 1 KW capacity based on your inspection requirements. You should choose.
Bandwidth
Since different objects resonate differently and within a specific ultrasonic range, therefore, the range of frequency detection of the universal ultrasonic transducer is critical for inspection precision.
Elements
The choice between a single element and a phased array universal ultrasonic transducer requires careful consideration. Nonetheless, the accuracy and maneuverability required will help in this choice.
Accessories
With different inspection scenarios, it becomes apparent that certain accessories are necessary to achieve accurate results. Couplant, wedges, and thickness gauges are some of the more essential accessories you might need to consider while customizing your universal ultrasonic transducer.
Our factory
Resonance Technology (Ningbo) Co. Ltd, founded in December 2019 with a registered capital of 10 million RMB, is located in the High-tech Zone Ningbo, China. The company has assembled top industry technical talents along with seasoned marketing and management professionals. Leveraging cutting-edge proprietary core technologies, it specializes in researching, developing, and selling high-performance power ultrasonic core components and related complete sets of equipment. The company's products are widely used in various industries such as new materials, fine chemicals, automotive, and new energy. Currently, the company has mastered core technologies in power ultrasonics including control algorithms, power amplification, drive matching, high-power transducer, and vibration system design. Its products have reached international leading levels, with over 40 patent applications and 23 patents granted. We have obtained the GB/T19001-2016/ISO9001:2015 quality management system certification. With around 2000 square meters of research and production facilities, the company possesses a well-equipped testing center capable of conducting more than 120 types of tests in six categories including physical performance, mechanical performance, environmental testing, simulation testing, chemical testing, and precision measurement.
FAQ
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