Transducer play a vital role in the field of instrumentation and control engineering. Any energy in a process needs to be converted from one form into another form to make the communication from one rectification sector to another. It is a device which converts one type of energy into another form i.e. the given non-electrical energy is converted into an electrical energy.
Types of transducer: The two main varieties of transducers, they are: Active transducers and Passive transducers. Active transducers: Active transducer is really a device which converts the given non-electrical energy into electricity by itself. Thermocouple, 3 Axis Load Cell and much more are the best samples of the transducers
Passive transducers: Passive transducer is really a device which converts the given non-electricity into electrical energy by external force. Resistance strain gauge, Differential Transformer are the examples for that Passive transducers.
The piezoelectric effect is located in some materials (such as quartz) that have an atomic lattice structure forming a rhomboid or cubic cell. When pressure (mechanical stress) is applied to the structure, it creates an electrical charge and, when an electrical field is used, a mechanical deformation occurs. “Piezo” hails from the Greek word for pressure.
Piezo Transducer: A piezo transducer converts electric energy in mechanical energy or vice versa. Basically any kind of piezo mechanism could be known as a transducer. Piezoelectrics can respond very rapidly to operate voltage changes and thus are often used to generate vibrations or sound. Piezo transducers are utilized in microphones, guitar sound pickups, speakers, buzzers, headphones, etc. The main benefit of a piezo speaker spanning a magnetically driven speaker depends on the simplicity, compactness, efficiency and robustness from the piezo ceramic plates that are employed to move the speaker diaphragm film.
Sonar and ultrasound imaging can also be based upon Torque Transducer. In this instance, the ultrasonic transducers are driven at their mechanical resonance frequency, a phenomenon that greatly boosts the amplitude while lowering the input power concurrently, i.e. the system is operated at its highest efficiency.
Piezo Actuator vs. Transducer: In motion control applications, piezo mechanic elements are usually known as piezo actuators. A piezo actuator is typically used to generate forces or position loads very precisely. In motion control applications piezo actuators are generally operated well below their mechanical resonant frequency.
Piezo resistive sensors: Piezoresistive sensors are low-cost, mass produced, typically silicon-based sensors that are very widely used for pressure sensing applications. These are sometimes used combined with piezo actuators to offer position feedback or force feedback, as an example on closed-loop microscope positioning stages. Piezoresistive signifies that the resistance changes with the applied pressure. Unlike piezo sensors, piezoresistive sensors do not generate a charge (energy) and they also cannot convert mechanical in electricity and the other way round. In precision nano-positioning applications, piezoresistive sensors are a great selection for entry-level systems. Other sensors can be found when cutting edge performance is necessary.
Lifetime of Piezo Mechanic Actuators: If operated under the right conditions, the newest generation of ceramic-encapsulated actuators can work for 10’s of billions of cycles.
Vibration Cancellation / Active Damping: Because of their fast response piezo mechanic actuators are a great option for active vibration cancellation.
Here, a vibration sensor is needed to supply the controller the right information about how to counteract the mechanical vibration by providing the right amplitude and phase output for the piezo actuator. The sensor can even be considered a piezo ceramic transducer, configured to answer strain or pressure.
Momentum Compensation / Active Damping: Any type of rapid actuation may cause vibrations in a work piece. In accordance with Newton’s laws, this means, the faster a piezo mechanical system operates, the better reactive forces it hdjjdy cause. In the event these forces are unwanted, a second piezo mechanical system with a counter mass may be integrated and driven using a signal of the opposite phase. With some fine-tuning the forces of both actuators will cancel each other out and also the work piece are now able to move quickly but without exerting any force on the surrounding structures. This trick is frequently found in fast Miniature Force Sensor for image stabilization in astronomical telescopes.
Technology has always fascinated the technician inside me. And covering the newest in technologies and mechanisms in usage has become my forte over recent years. Follow my write ups to know about the most recent in technologies and mechanisms this coming year for one. This fall piezo, piezo mechanisms are extremely much in demand among the technical and mechanical industries across the world. Stay updated on these products exclusively from USA.