On-line Magazine 'Sensors & Transducers' (S&T e-Digest)
(ISSN 1726 - 5479)
Vol. 59, No. 9, September 2005
Table of Contents
International Frequency Sensor Association (IFSA): 2004-2005 Annual Report
Dear IFSA Members and Sensors Web Portal Visitors !
It is my great pleasure congratulate you all with the 6th IFSA anniversary. Our Sensors Community is very international: today we have 447 active members from 61 countries.
Key achievement in 2004 was the introduction of Universal Frequency-to-Digital Converter (UFDC-1) to the market and new concept development of smart and digital sensors design on its basis. It was possible due to joint effort of many scientists, researchers and engineers from many countries, dozens years experience in advanced conversion methods, IFSA coordination and Sensors Web Portal, Inc. management.
In our IFSA Annual Report 2004-2005 you will be able to see detailed statistics, members interests and much more including our activities description and future plans. Welcome to IFSA !
Prof., Dr. Nikolay V. Kirianaki,
IEEE 1451 Standard and Frequency Output Sensors: How to Obtain a Broad-Based Industry Adoption ?
An effort to simplify the IEEE 1451 standards family extension for adding smart, plug-and-play and self-adaptation capabilities to frequency output sensors is describe in the paper. It was shown that due to the use of one universal component - the universal frequency-to-digital converter (UFDC-1), any frequency output sensor can be transformed into a smart transducer compatible to the IEEE 1451 standard. This gives strong benefits to both: customer and manufacturers, increases the level of commercial adoption of the standard in industry and smart sensors market up to 20 %.
Sergey Y. YURISH
International Frequency Sensor Association (IFSA)
High Precision, Wide Speed Range Rotation Sensing with UFDC-1
The application specific paper describes a high precision, wide speed rotation sensing approach based on the Universal Frequency-to-Digital Converter (UFDC-1). Such design approach lets significantly simplify the design process, reduce time-to-market and production price and produce tachometers and tachometric systems with high metrological performances and digital self-adaptive smart rotation speed sensors.
Nikolay V. KIRIANAKI 1, Sergey Y. YURISH 1,2
1International Frequency Sensor Association (IFSA)
2Institute of Computer Sciences and Technologies, National University Lviv Polytechnic
Digital Humidity Sensors and Data Logger Design Based on Modern Frequency-to-Digital Converter
The application specific paper describes a design approach for digital humidity sensors, data acquisition systems, data loggers and multisensors systems. Practical realizations are based on the Universal Frequency-to-Digital Converter (UFDC-1). Such design approach lets significantly simplify the design process, reduce time-to-market and production price and produce multisensors systems with high metrological performances. Practical examples of direct interfacing of frequency output humidity transducers and humidity-to-frequency converters to the UFDC-1 are given.
Sergey Y. YURISH
Institute of Computer Sciences and Technologies,
National University Lviv Polytechnic,
High Temperature, Radiation Hardened Accelerometers
for Shock and Vibration Measurements
September 1, 2005, Depew, NY – The Vibration Division of PCB Piezotronics, Inc. introduces two new High-temperature, Radiation Hardened, Single Axis, Ceramic, Charge Output Accelerometers. Models 357B53 and 357B54, each have sensitivities of 100 pC/g and a measurement range of ±150 g peak. They are hermetically sealed in a titanium housing and are stud-mounted. This durable design operates in temperatures from –95 to +500° F (-71 to +260° C), and survives accidental shock inputs to ±2,000 g. These new sensors are ideally suited for shock and vibration measurements in high temperature and/or nuclear radiation environments as they are also radiation hardened, and are rated for exposure to Integrated Neutron Flux up to 1010 N/cm2 and Integrated Gamma Flux up to 108 rads.
Model 357B53 features a 10-32 side-mounted connector, while Model 357B54 features a 10-32 top-mounted connector. They are typically used with PCB® Series 003 low-noise cables for temperatures up to +500ş F (+260 °C), or with PCB® Series 023 hardline cable, when used in radioactive environments.
Mark Amatuzzo, Product Manager
3425 Walden Avenue
Depew, NY 14043-2495
Tel.:(888) 684-0013 ext. 2706, fax: (716) 685-3886
Dynamic Pressure Sensors Enhance Gas Turbine Performance
ENDEVCO Corporation has developed a Dynamic Pressure Sensor for use in high temperature combustion monitoring. The sensor is designed to work continuously at 986oF/530oC with intermittent 1040o/560oC. The unit is mounted on the combustion chamber and provides critical information related to the dynamic environment in the combustion zone.
Information derived from ENDEVCO’s Dynamic Pressure Sensor provides the user with critical data to effectively analyze the efficiency of the combustion process for proper fuel-air mixture in order to attain optimal engine performance. With the ability to fine tune turbine performance the operator is able to reduce emissions and identify issues regarding engine performance for maintenance scheduling. Seamless fuel transition is an additional benefit for those dual fuel applications. Hundreds of units have been installed for over three years in large industrial gas turbine applications, and have demonstrated hundreds of hours of continuous operation with no reported failures. Endevco also supplies flexible high temperature cables to simplify installation.
Wendi R. Burke,
Methanol Concentration Sensor for Fuel Cell Market
Integrated Sensing Systems, Inc. (ISSYS) in Ypsilanti, Michigan announced that it is developing small methanol concentration sensors, targeting the active Direct Methanol Fuel Cell (DMFC) market. ISSYS is both developing its own products and working with Japanese based Kyoto Electronics Manufacturing Company (KEM) on another version of this device. These small sensors will also be utilized in a variety of other industrial and analytical applications for the need of a low-cost, accurate, small, inline density or chemical concentration sensors.
ISSYS' sensors are based on Micro ElectroMechanical System (MEMS) technology. This microfluidic technology offers advantages in system and sample size, cost and reliability over current approaches to fluidic density, methanol concentration and chemical concentration measurement.
The use of a methanol concentration sensor is essential for the practical application of a variety of DMFC technologies. Currently ISSYS' technology offers the only efficient solution for the DMFC application, particularly due to its outstanding accuracy, stability and potential low cost. Furthermore, unlike previous methanol concentration sensors, ISSYS' products operate over a wide temperature range and are not sensitive to chemical impurities.
Fuel cells offer a big improvement in portability over conventional battery packs. Applications for DFMC technology include laptop computers, PDAs, camcorders and other portable consumer electronics.
Integrated Sensing Systems Inc. (ISSYS),Ypsilanti,
Tel.:734-547-9896 ext. 119, fax: 734-547-9964
Torque Transducers for Aerospace Hydraulic Pumps and Motors
September 9, 2005, Depew, NY, USA - Rotating torque transducers from the Force/Torque Division of PCB Piezotronics, Inc. (PCB ®), utilize non-contact, rotary transformers for sending excitation voltage to, and receiving measurement signals from, the strain gage instrumented rotating sensor element. The rotary transformer design eliminates the need for replacing worn brushes, as is the case with conventional slip ring type rotating torque sensors.
Because of their unique flange and splined shaft design (conforms to AND 10262 & 20002), the units are an ideal choice for use in torque studies on cantilevered aerospace hydraulic motors and pumps. Other applications include dynamometers for combustion engines, drive shafts, transmissions, fans, and electric motors.
In addition to the torque output signal, an optional pickup provides an output proportional to speed and an optional K type thermal couple to monitor internal bearing temperature. The units feature high torsional stiffness and low rotating inertia. Custom designed units are available for alternate measurement ranges and speeds.
3425 Walden Avenue, Depew, NY 14043-2495 USA
Tel: (888) 684-0004 ext. 2405, fax: (716) 684-8877
Capacitance-to-Digital Converter Simplifies Instrumentation and Sensor Design
Analog Devices, Inc. announced the high-precision, fully integrated converters that address the complex and difficult signal processing challenges of direct capacitance-to-digital. Combining advanced signal processing techniques with high levels of integration, ADI’s capacitance-to-digital converter (CDC) attains a level of precision previously only possible with conventional analog voltage-to-digital converters aided by a significant number of discrete components. ADI’s devices provide designers significant advantages over existing discrete solutions for capacitance- and impedance-sensing applications that have historically lacked precision and proven difficult and expensive to design. The devices are ideal for a wide range of high-performance instrumentation and sensing applications, from blood pressure monitors and glucose analyzers to position sensors for automobiles and industrial corrosion analysis systems.
Single-chip, high precision CDC – the AD7745/6/7 CDC integrates all stages of capacitance-to-digital conversion on one chip reducing costs associated with traditional multi-chip solutions by 65 percent. With 24-bit resolution, the AD7745 is the industry’s highest-precision solution for interfacing with capacitive sensors. Ideal for industrial and medical instrumentation and automotive sensing applications. The AD7745 and AD7746 are configured for two-electrode capacitance sensors, while the AD7747 is for one-electrode devices. Specifications include an operating range from 2.7 to 5.25 V, an accuracy of 2 x 10-15 F, a speed of 5 to 90 Hz, and a power consumption of 1 mA max.
Analog Devices, Inc., Wilmington, MA
Technical Support 800-262-5643
RotaryPoint, Small Footprint, Rotary Paddle Bin Level Indicator
for Bulk Solids Applications
Houston, TX - ASI Instruments announced RotaryPoint, a new low-cost rotary paddle bin level indicator. RotaryPoint is a rugged, small footprint device whose heavy-duty motor gearing provides up to twice the life expectancy of other paddle indicators. Designed for measuring the level of dry bulk solids in hoppers, silos, bins, and tanks, the system handles materials with densities of 10 lbs/ft3 or more, including grains, plastic pellets, even high density aggregates like limestone and rocks.
With RotaryPoint, there are no more screws or fasteners to hinder access; the unit features a twist-on cover for quick access to wiring. The indicator can be mounted on the top of bins or on the side to indicate high, intermediate, or low levels. Two 20 A single pole-double throw (SPDT) reed switches allow activation of alarms and controls, including visual indicators or conveyor belts. Stainless steel mounting plates are standard, allowing the device to be a drop-in replacement for virtually any other paddle switch. Flexible shaft couplings, extended shafts, and shaft guards are available for protected operation of the rotating paddle in almost any position and orientation. For hazardous applications, RotaryPoint provides FM Approved and CSA Certified housing options.
Director of Marketing,
ASI Instruments, Inc.,
8570 Katy Freeway, Suite 117,
Houston TX 77024 USA
Tel.:800.245.7056, +1 225.673.6100, fax: +1 713.461.7348
Multi-Spectrum IR Flame Detector Features Breakthrough IR5 Technology
Vibro-Meter, Inc. has introduced the most advanced infrared (IR) flame detector available for today’s demanding fire detection applications. The Omniguard Model 760 Multi-Spectrum IR5 senses infrared radiation in five discrete infrared (IR5) wavelengths for early fire detection of both hydrocarbon and certain non-hydrocarbon-based fires. The Omniguard Model 760 Multi-Spectrum IR5 detects unwanted fires and outputs alarm information via relay, current loop, or MODBUS over RS-485. The Model 760 utilizes the Omniguard patented Fire Event Analysis algorithm for rapid-fire detection and superior false alarm immunity.
The Model 760 automatic self-test function monitors the detector’s ability to sense fires and reports a fault condition when impaired. The self-test feature also eliminates the need for an external test device. The standard Model 760 is enclosed in an explosion-proof, powder coated, copper-free aluminum housing but can be ordered in a stainless steel enclosure as well. Swivel mount kits are available for either enclosure.
Applications for the Omniguard Model 760 IR5 Flame Detector include aircraft hangars, refineries, petrochemical plants, power generation sites, and flammable liquid and gas storage facilities. The Model 760 is also particularly well suited for hydrogen fire detection applications.
Intelligent Digital LVDT Controllers & Indicators Simplify Set-Up in Diverse Application
Pennsauken, NJ, September 9, 2005 - Macro Sensors introduces a new family of economically-priced and user-friendly digital controllers and indicators that delivers precise measurement for applications using AC- and DC-LVDT (Linear Variable Differential Transformer) inputs.
Designed especially to optimize the use of LVDTs in automation, process or lab applications, the Series DMI Single Channel LVDT Indicators offer user-friendly set-up with a scrolling display that actively prompts users for all LVDT parameters. A 5-digit alphanumeric display, which can be calibrated in any engineering units, offers readout down to 1/10,000 inch. Units offer four programmable setpoints with alarm status annunciator LEDs. With the Series DMI Indicators, R&D staff, factory automation personnel and other technicians can easily set up and monitor the functionality of plant controllers and indicators without engineering assistance.
Designed to drive and condition the signal from an LVDT transducer, the Series DMI Single Channel LVDT Indicators contain two high-speed micro controllers and a 16-bit A/D converter that has over 130 dB noise rejection at the excitation frequencies and is capable of 40 Hz averaged output on 45 samples. Scrolling text menus provide quick access to a range of configuration modes for easy application setup.
LVDT sensors used with the Series DMI Single Channel LVDT Indicators can be applied in almost all engineering applications covering civil, mechanical, petrochemical, power generation, production, aerospace, defense, and much more. They can be used on production lines to automatically gauge products for quality control and product sorting. In the power generation and petrochemical industries they can be used, for example, as servo position feedback on actuated equipment such as valves and dampers, or for measuring turbine casing expansion. Submersible units can be used in marine and offshore mining applications.
Sound Level and Octave Band Meter
September 1, 2005, Provo, UT - The new sound level meter from Larson Davis offers an innovative approach to sound measurement for compliance and exposure monitoring. Available in Type 1 or Type 2 versions, the SoundTrack provides an easy way to manage route- or task-based workplace noise surveys. With operator route prompts and digital voice annotation, surveys are done quickly and easily by operators at all skill levels. Optional integrated real-time 1/1 and 1/3. Octave filter performs frequency band analysis instantly with no tedious step-through.
Manager, Industrial Hygiene Products Group,
Larson Davis, Inc.,
1681 West 820 North, Provo, UT 84601 USA,
Tel.: (888) 258-3131, fax: (716) 926-8215
New Ethernet I/O Module with a Mix of Analog Inputs,
Analog Outputs and Discrete I/O Channels
Wixom, MI - Acromag released their new 951EN and 952EN “Combo” Ethernet I/O modules with four analog input channels, two analog output channels, and six discrete input/output channels on a single inch-wide unit. This mix of I/O can reduce costs significantly by replacing the need to buy three different I/O modules. The modules support Ethernet/IP and Modbus TCP/IP protocols as well as Acromag’s own i2o™ communication technology. The i2o (input-to-output) function allows input channels on one module to send measured signal data directly to output channels on a remote module across any Ethernet media without a PLC, PC or other controller in between. Since the Combo modules have inputs and outputs, they can function as both transmitters and receivers to independently interface signals across the plant or around the globe. No software is required because the setup uses a standard Internet browser to configure an embedded web page.
Robert Greenfield, Marketing Communication. Manager
30765 S Wixom Rd, PO Box 437, Wixom, MI 48393-7037 USA
Tel: 248-624-1541, fax: 248-624-9234
Multisensor Data and Information Processing
(Special Issue, August 2005)
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