Technologies in Depth

In-depth technical articles on the various types of sensors and how they work.

Measuring with Light Part 3: Dense Wavelength Division Multiplexed Fiber-Optic Communications   June 1, 2000

What does a cutting-edge technology from the communications arena have to do with fiber-optic sensing? Bandwidth, massive amounts of bandwidth.More>>

Measuring with Light Part 2: Fiber-Optic Sensing-From Theory to Practice   May 1, 2000

Part 1 of this article laid the groundwork by explaining the physics of the light-guiding operations of optical fibers. Now, in the second part, you move from theory to practice with an examination of how these fibers can be used to measure everything from pressure to temperature to strain.More>>

The Electrolytic Tilt Sensor   May 1, 2000

Electrolytic tilt sensors are inexpensive to buy and use, and offer good repeatability and reliability. Their sensitivity to both internal and external influences, however, makes them complex devices that should be understood before installation and operation.More>>

The Universal Current Sensor   May 1, 2000

A new generation of current sensors based on the magnetoresistive effect is extremely compact and offers tight measurement tolerances and a high bandwidth—at a low price.More>>

Measuring with Light Part 1: The Physics of Fiber Optics   April 1, 2000

In the last two decades, the development of fiber-optic sensors has led to the creation of devices and systems that can measure more than 60 different parameters. Here's a look at the physical underpinnings of the light-guiding operation of fibers and an overview of the fundamental field...More>>

Two approaches to Measuring Acceleration   February 1, 2000

Analog engineers will appreciate the piezoelectric accelerometer design that provides control over the signal conditioning portion of the measurement. Other engineers will opt for the digital method that allows surface micromachined capacitive accelerometers to practically design themselves.More>>

MEMS Reshapes Ultrasonic Sensing   February 1, 2000

Built in silicon with advanced MEMS technology, new ultrasonic sensors offer improvements in performance and cost and enable a wider range of applications.More>>

Low Magnetic Field Sensing with GMR Sensors, Part 1: The Theory of Solid-State Magnetic Sensing   September 1, 1999

Because of their small size, low power consumption, and relatively low cost, solid-state magnetic field sensors are moving into a growing range of new applications. Today, the new frontier for these sensors is detection of low magnetic fields.More>>

A Micromachined Quartz Angular Rate Sensor for Automotive and Advanced Inertial Applications   August 1, 1999

BEI GyroChip, consisting of a unique micromachined double-ended quartz tuning fork and advanced electronics, uses the Coriolis effect to sense yaw rates. It has been widely accepted in automotive, aerospace, defense, medical, and industrial applications.More>>

Demystifying Piezoresistive Pressure Sensors   July 1, 1999

Semiconductor components that use new signal processing techniques for piezoresistive pressure sensors have enabled precise, automatic, and low-cost electronic compensation of the standard error parameters. The resulting simplification and convenience have opened a wide field of new applications,...More>>





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