声波与超声波换能器是机电或声电换能器。它们将电能转换为振动，用于产生机械能、声能或甚至热能。声波换能器在声频范围内进行操作，而超声波转换器在20千赫或以上进行操作。换能器通常是能互相转换的装置：大多数换能器可以用作传感器或机电转换的发生器。本节仅做驱动或发射模式介绍。这种换能器的转换通常基于压电，磁致伸缩或磁力。
最常规的方法在于使用这样的力来激发机械共振。在相同的电激发下，在共振下的振动是低频振动乘以在共振下的机械品质因数。这种方法能实现高效并降低激励电压。另一种方式是产生受迫振动。受迫振动导致大频率带宽，并且减少对负载变化的敏感度。
一般的超声换能器也称为工业超声波处理器通常是基于3个半波谐振器的谐振结构：一个压电转换器，一个增幅器和一个焊头。它们用于超声波焊接，研磨，清洗，雾化或超声波辅助钻孔，挤压，均化，过滤器清堵... CEDRAT TECHNOLOGIES可以使用标准转换器制定解决方案。通常也为客户定制适用于负载的焊头，如下所示。
一种新方法为使用新的活性物质，如多层压电陶瓷（MLA）或超磁致伸缩材料（GMM）。这些材料通常被用来制造在双质量Tonpilz结构中的低频谐振换能器。基于预应力MLA，CEDRAT TECHNOLOGIES的PPA和APA®与超小型谐振换能器有着密切的关系，因为它们能在水下跟踪仪的低电压（<10V）下提供非常大的动态应变（超过1％）。此外，PPA和APA®在谐振频率以外提供大的应变，这使它们能用于受迫振动，如摩擦测试仪，压电振动器或各种振动辅助处理（玻璃/金属/复合切割，钻孔，电火花...）。
最后，磁性促动器还可以被用作低频声源：CEDRAT TECHNOLOGIES的MICA磁性促动器能替代音圈，提供一个好的选择：更大的力密度和低于10倍的发热。超磁致伸缩材料（GMM）是压电的低频高功率换能器（声纳）的替代品。
The aim of SONO“R”US is to allow redefining some of the key features of the prototype developed under the Sonoplast project. The result will be a ready-to-market micromoulding machine that represents flexible, reliable and cost efficiency solutions for producing complex shaped and functional ?-parts.
Ultrasonic transducer ; Piezoelectric ; Magnetostrictive ;Micro injection, moulding machine, polymere, micro-part, European FP7 project
The SONO project aims at developing a pilot line of antibacterial and antifungal medical textiles based on a sonochemical process patented at BIU laboratories. CEDRAT TECHNOLOGIES will develop the mechatronic hardware for this pilot line including the transducers.
Ultrasonic transducer ; Piezoelectric ; Magnetostrictive ; Sonochemical reactor ; medical textile
The modular ultrasonic transducer (MUST) developed by CTEC improves the potential of classical tubular transducer. The main advantages:
-Longer sonotrode with up to 5 meters length - Bigger surface of cavitation
-Uniformity of the treatment improved -Better efficiency of the electro-acoustic conversion.
Ultrasonic transducer ; Piezoelectric ; Magnetostrictive ; Sonochemical reactor ; medical fabrics
In machining, cutting or drilling operation, vibrations reduce the friction rate between bodies in relative motion. Piezo actuators or transducers operating either in forced or ultrasonic resonant mode can improve the process speed and quality.
Machine tool, cutting, drilling, milling ; improvement of quality and speed process
For applications requiring high ultrasonic power, standard solutions cannot be used directly. It is important to design the appropriate sonotrode to tune the transducer and the load. ATILA FEM can help in such design and to make working transducers.
Welding, cutting, homogenizing, emulsifying, ultrasonic cleaning, aerosol generation
WATER TRACKER tracks and localizes urban water pipes using acoustic waves. The WATER TRACKER emitter is an APA®-based transducer operating at low frequency with high amplitude vibrations for long range sound emission.
Sound emission, High Power sonar Transducer, acoustic localization
The goal of Sonoplast FP7 project is to develop an innovative process using ultrasound for polymere micro injections, in order to manufacture high precision micro-parts (<10gr). CEDRAT TECHNOLOGIES is in charge of ultrasonics.
Micro injection, molding machine, polymere, micro-part, European FP7 project
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