bullet Sensors & Transducers e-Digest (S&TD)



No. 9, September 2002



Table of Contents

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Flip-Flop Sensor - an Offer for Increased Function of the Smart Sensors


Abstract: This paper illustrates a flip-flop sensor as an offer for increased functionality of the smart sensors. The adaptation for internal as well as external parameters is achieved by controlling with the slow-rise control pulse of a flip-flop sensor.


Martin Kollar,

Department of Electronics and Multimedia Telecommunications,

Technical University of Kosice, Park Komenskeho 13, 

041 20 Kosice,Slovak Republic.

Tel: + 421-55-6338659; 

fax: + 421-55-6323989

E-mail: Martin.Kollar@tuke.sk



The UTI Evaluation Board with In Circuit Debugger under MPLAB


Abstract: The UTI evaluation board described here is using the Input Capture unit of the PIC16F873 single-chip microcontroller for the measurement of the period duration of the UTI output.


Ratcho Ivanov, 

Alexander Kerezov,

Ivan Lesichkov.

Technical University - Sofia, Bulgaria

E-mail: akerezov@tu-sofia.acad.bg





Slurry Pulsation Pressure Sensors


The Pressure Division of PCB Piezotronics, Inc., announces the Models 106C10 and 106C20 dynamic, ICP pressure sensors. These high sensitivity, piezoelectric pressure sensors are specifically designed for measuring fast pressure transients, surges, spikes, and pulsations in paper slurry systems. They are used to detect and monitor dynamic pressure pulsations of paper slurry in headbox and piping systems, to troubleshoot and determine root cause of slurry flow irregularities, and to reduce maintenance, increase system efficiency, and improve product quality. The units generate a low-noise, 300 mV/psi output signal that is capable of detecting very minute pressure transients. The floating gland nut design permits mounting through a check valve, to various lengths, for a flush diaphragm installation. The models are identical, except for overall length, with the 106C10 being 7.5" and the 106C20 being 13.25". Being AC coupled devices, these piezoelectric sensors will ignore any static, background pressure component and respond only to the pressure transients.

PCB Piezotronics, Inc.,

Pressure Division,

Tel: 888-684-0011,

Fax: 716-686-9129

E-mail: pressure@pcb.com


Slurry Pulsation Pressure Sensors 106C20



Low Cost, Embeddable Accelerometers


PCB Piezotronics division, announces the Series 660 low cost, embeddable, piezoelectric accelerometers. The small-sized devices are suitable for a wide range of vibration and shock measurement applications and are particularly attractive for O.E.M. requirements. Three sizes provide a range of sensitivities in ICP®, voltage, or charge mode configurations. All units feature broad frequency response, high signal-to-noise ratio, wide operating temperature range, low power operation, and ease of installation. Several applications have emerged including impact detection and recording for vehicles, packages, and stamping operations; machinery monitoring for bearing defects, gear wear, and cutting tool wear; and structure borne acoustics for guitars and safety helmets. Mounting techniques lend to embeddable or circuit card installation.


Andrea Mohn,

PCB Piezotronics division,

Tel: + (800) 959-4464,

Fax: + (716) 684-3823

E-mail: imi@pcb.com


Embeddable Accelerometers, Series 660



Load Cell Option Provides 4 to 20 mA Output Signal


The Force/Torque Division of PCB Piezotronics, Inc., announces an exciting new option that is available for an entire line of general purpose and fatigue rated load cells with capacities from 25 Ib to 200,000 Ib. The 4 to 20 mA output signal option adds signal-conditioning circuitry within the load cell to provide current mode, 2-wire, loop-powered operation from any unregulated, 8 to 36 VDC power supply. Additional signal conditioners are not required. The option is available for canister, low profile, and rod style configurations to support a wide range of load, weighing, and force measurement requirements. The devices are well suited for process control, process automation, process evaluation, process feedback, and quality control applications. Advantages include ease of operation, lower system cost, improved signal-to-noise ratio, ability to transmit signals over long distances, and ability to interface directly with PLCs.


Andrea Mohn,

Force/Torque Division of PCB Piezotronics, Inc.,

Tel: 888-684-0004

Fax: 716-684-8877

E-mail: force@pcb.com


4 to 20 mA Output Load Cell



Fastest Dual Output Line Scan Camera with Unsurpassed Sensitivity


Pixel Devices is now shipping its Ultra High Performance Owl Line Scan Camera to customers throughout the world. The Owl family of Line Scan Cameras combines very high sensitivity and ultra-low noise with high speed operation. The payoff is high signal-to-noise ratio for your toughest imaging applications. The Owl cameras operate at up to 50,000 lps, have a sensitivity greater than 2000 DN/nJ/cm2, and have read noise below 10 electrons. All Owl Cameras provide CameraLink "medium" configuration for convenient data acquisition and control. They can be operated at 50Mpixels/sec from each of two 14-bit outputs. An RS232 port is provided for additional flexibility in controlling the camera independently of the CameraLink interface. The Owl cameras are based on Pixel Devices' proprietary Low Noise Linear (LNL) image sensors, developed to provide high sensitivity at high speed while maintaining ultra-low read noise. They achieve sensitivity approaching multistage TDI sensors, but without the alignment problems. The Owl is optimized in three models to maximize performance for specific performance requirements from highest speed to lowest noise.


Gary Glaser,

Pixel Devices International

143 S Taaffee, Sunnyvale, CA 94086,

Tel: +408 616 8852 ext156

E-mail: glaser@pixeldevices.com

Owl Line Scan Camera





Endevco Signs Cooperative R&D Agreement with Sandia National Laboratories


SAN JUAN CAPISTRANO, Calif. - September 19, 2002 - Endevco Corp., a leading supplier of dynamic instrumentation for vibration, shock, inertial motion and dynamic pressure measurements, has signed a cooperative research and development agreement (CRADA) with Sandia National Laboratories. Under the terms of the agreement, the companies will jointly develop a robust (60,000 g's), low volume, low power acceleration sensor (accelerometer) and a small acceleration recording device that will utilize the newly developed accelerometer. The CRADA will help Sandia facilitate the design and development of smaller, lower-power, acceleration-recording devices in support of its Defense Programs and Emerging Threats missions.


Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. With main facilities in Albuquerque, N.M., and Livermore, Calif., Sandia has major research and development responsibilities in national security, energy and environmental technologies, and economic competitiveness.


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