Acceleration sensors, as the name implies, detect acceleration, or changes in speed per unit time. These devices have become increasingly compact in recent years, with the application of MEMS technologies. They can be found in a variety of products; for example, automobiles, handheld video games, and smartphones. There are various types of acceleration sensors, but using KRYSTAL’s PZT in the piezoelectric process contributes to even better performance.
Gyro sensors detect angular velocity and convert that information into a signal. Those signals are used to detect running paths in car navigation systems, or to correct “camera shake” in digital cameras. MEMS gyro demonstrates outstanding performance in detecting minuscule levels of force. Even stronger signals can be achieved by using materials with high output charge. This further increases accuracy, and enables even more accurate tracing of movement.
E.g.: Car navigation systems, camera shake correction, drones, advanced driving support systems, handheld video games, airbags
LiDAR | PZT (for Actuators)
LiDAR (Light Detection and Ranging) is a technology that uses laser light for detection and distance measurement. It is considered especially important in automatic driving, but has come to be used in a broad range of applications recently, including mobile phones.
E.g.: Automatic driving; advanced driving support systems
Pressure sensors | PZT (for Sensors)
Pressure sensors detect pressure and convert that information into an electrical signal. There are various types of pressure sensors; PZT film is used in piezoresistive (diffusion) pressure sensors, among others.
E.g.: Fuel pressure sensors, barometers
Infrared sensors | PZT (for Sensors)
Pyroelectric infrared sensors use the effects of pyroelectric ceramics to detect infrared light. The spontaneous polarization of the piezoelectric material causes a temperature change when the infrared light is received, and an electric charge proportionate to the pyroelectric coefficient is generated in the optic receiver. This charge is immediately neutralized, but the sensor detects the voltage that is generated instantaneously at that moment.
E.g.: Motion sensors, air conditioners
Oscillation power generation elements | PZT (for Sensors)
“Oscillation power generation” is a form of energy harvesting technology in which a piezoelectric element is used to generate power from oscillation energy. The Oscillation power generation element can also be used as a power source for the sensor element.
Local vacuum | PZT (for Actuators)
A technology called “local vacuum” has gained attention as a near-future technology that could become a reality through the use of KRYSTAL’s PZT film. For example, a micro-pump driven by the piezoelectric properties of PZT film can be used to generate a low-level vacuum. This micro-pump could then be attached to the end of a robot arm, allowing the robot arm to hold onto an object. Using this PZT film simplifies the design dramatically, because only a power cable is required to drive the unit.