The term “Biometrics” is derived from “bio’” which means life, and “metrics”, which means measurement. Biometrics is developing for use in various technologies, including the unique identification and recognition of people. The technology at its current juncture is widely used in security and surveillance systems. Biometrics also has the possibility of converging with other technologies […]
FAQ
The automotive Tire Pressure Monitoring System, Part 4: Issues
Sensor-based monitoring systems for tire pressure can warn of potential problems, but there’s much more to the story than just a pressure-measurement system. The TPMS adds a highly specific safety-related feature to cars. However, as with many presumably good ideas, the “devil is in the details”, and that’s especially true for the TPMS. There are […]
The automotive Tire Pressure Monitoring System, Part 3: implementation
Sensor-based monitoring systems for tire pressure can warn of potential problems, but there’s much more to the story than just a pressure-measurement system. Once the decision was made to use the direct measurement technique, IC vendors developed the needed components and equally important packaging. A TMPS requires a significant amount of analog, digital, and RF […]
The automotive Tire Pressure Monitoring System, Part 2: perspectives
Sensor-based monitoring systems for tire pressure can warn of potential problems, but there’s much more to the story than just a pressure measurement system. During the comments phase before the formal safety mandate was published per the legislative direction, the automotive-related communities had differing views on the need or wisdom of the electronic TPMS: The […]
The automotive Tire Pressure Monitoring System, Part 1: the situation
Sensor-based monitoring systems for tire pressure can warn of potential problems, but there’s much more to the story than just a pressure measurement system. You may have had the misfortune to have the “Check Engine” light come on in your car. This single illuminated indicator encompasses a wide range of possible problems ranging from trivial, […]
Principles, selection and design with piezoelectric actuators
By Patrik Kalbermatten, Senior Manager – Distribution Promotion Product Management Magnetic, Sensor & Actuator at KEMET Electronics Corporation a YAGEO company Piezoelectric actuators that exploit the inverse piezoelectric effect to produce a displacement in response to an applied voltage can offer an alternative to familiar electromagnetic devices such as motors and solenoids. They offer advantages […]
What are capacitive pressure sensors?
When automotive ignition and carburetor systems initially required inputs from the engine to control spark and fuel and lower vehicle emissions, a capacitive pressure sensor was designed to specifically measure manifold absolute pressure (MAP) and barometric absolute pressure (BAP). Called a silicon capacitive absolute pressure (SCAP) sensor, it consisted of a micromachined diaphragm etched into […]
What is the role of sensor fusion in robotics?
As robots become increasingly autonomous, sensor fusion is growing in importance. Sensor fusion merges data from multiple sensors on and off the robot to reduce uncertainty as a robot navigates or performs specific tasks. It brings multiple benefits to autonomous robots: increased accuracy, reliability, and fault tolerance of sensor inputs; extended spatial and temporal coverage […]
Sensor fusion levels and architectures
Sensor fusion is the process of combining inputs from two or more sensors to produce a more complete, accurate, and dependable picture of the environment, especially in dynamic settings. The goal of sensor fusion is to provide those improved results with the minimum number of sensors and minimum system complexity for the lowest cost. The […]
Sensor fusion – How does that work?
Each sensor type, or modality, has inherent strengths and weaknesses. Sensor fusion is the process of bringing together inputs from multiple sensors to form a single model or image of the environment around a platform. The resulting model is more accurate because it balances the strengths of the various sensors. Sensor fusion brings the data […]