White Papers

Pedal Position Sensing in Heavy-Duty Vehicles

Pedal position detection is nothing new when it comes to operation of heavy duty equipment. However, the age old system operation of mechanical linkages between the pedal and the engine just might be coming to an end. New sensor technology is now enabling non-contact, drive-by-wire that can reduce total system cost while standing up to the harsh environments of off highway equipment.

Posted in: White Papers, Mechanical Components, Fluid Handling, Motion Control, Data Acquisition, Sensors

Read More >>

Evaluating the Chemistry of Brake Pads using SEM-EDS

Brake pads are a critical part of a vehicle’s overall braking system. With the broad diversity of available brake pad types, sub-types and unique chemistries there is an open question as to which brake pad provides the best overall performance.

Posted in: White Papers, Automotive, Manufacturing & Prototyping, Materials

Read More >>

Machine Positioning Uncertainty with Laser Interferometer Feedback

Laser interferometers are used as a measurement reference for machine correction and accuracy validation in the production of many high precision motion systems. Under controlled environmental conditions, laser interferometer measurement can provide low measurement uncertainty relative to the achievable accuracy of most commonly used motion control devices. As such, when processes require the utmost precision, laser interferometer measurement near the machine’s work point is frequently used as the feedback mechanism for machine control. In these instances, the use of laser interferometry to characterize the machine’s motion is unjustified because the measurement uncertainty of the metrology system is equivalent or higher than the motion error. The accuracy of these machines’ motion must be equated to an uncertainty in the feedback system’s measurement of the defined work point’s motion.

Posted in: White Papers, Mechanical Components, Mechanics

Read More >>

dB or not dB? Everything you ever wanted to know about decibels but were afraid to ask...

True or false: 30 dBm + 30 dBm = 60 dBm? Why does 1% work out to be -40 dB one time but then 0.1 dB or 0.05 dB the next time? These questions sometimes leave even experienced engineers scratching their heads. Decibels are found everywhere, including power levels, voltages, reflection coefficients, noise figures, field strengths and more. What is a decibel and how should we use it in our calculations? This Application Note is intended as a refresher on the subject of decibels.

Posted in: White Papers, White Papers, Aeronautics, Defense, RF & Microwave Electronics

Read More >>

How to Make Low Flow Measurements Using Turbine Flow Meters

Accurate low flow measurement represents significant challenges in many applications. Some typical low flow applications in the aerospace market include: small UAV fuel consumption, satellite thruster fuel consumption, and fuel/chemical/water injection. The low dynamic energy associated with flow rates down to 0.001 GPM exceed the capabilities of most mechanical flow meters and force the use of less accurate flow meter technologies.

Posted in: White Papers, Instrumentation, Mechanical Components, Data Acquisition, Sensors

Read More >>

DIGITAL PATHOLOGY: A Primer for Microscope Camera Selection

Most pathologists today use digital systems within their practices and research projects to communicate, store data, and analyze images. Whether it’s within clinical, forensic, surgical, or other branches of pathology, communication and consultation among specialists is greatly improved by the use of digital systems and enables faster diagnosis for patients.

Posted in: White Papers, Imaging, Medical, Optics, Photonics

Read More >>

Integration and Operational Guidelines for MEMS-Based Inertial Systems: Application that includes Magnetometers

A high performance inertial system that includes magnetometers can provide accurate platform heading information in a variety of applications and operational environments. However, performance depends greatly on where the inertial system is installed within the application. In our white paper, you’ll learn integration guidelines for inertial systems and operational compensation considerations. It includes information on:

Posted in: White Papers, Aeronautics, Electronics & Computers, Data Acquisition, Sensors

Read More >>

The U.S. Government does not endorse any commercial product, process, or activity identified on this web site.