bullet On-line Magazine 'Sensors & Transducers' (S&T e-Digest)

    (ISSN 1726- 5479)

 


 

No. 7, July 2004

 

Bullet

Table of Contents

 

EDITORIAL

 

International Frequency Sensor Association (IFSA) Supports

IEEE 1451 Standardization Process

 

Last years International Frequency Sensor Association (IFSA) becomes a foothold of international effective cooperation, covering all sensors related area of science, research and development. A standardization process is very important in its activity. We have been covering and disseminating information about IEEE 1451 family of standards (Smart Transducer Interface Standards for Sensors and Actuators) and TEDS sensors near five years (see lists of articles [1, 2]).

 

IFSA is not aimed at any specific smart sensors technology, even though our members may have their professional or personal preferences. Specific target IFSA aims are to help users understand smart sensors and transducers capabilities based on application areas; improve user confidence and access to solutions; enlarge the entire market; and, in particular, focus on the end user. While IFSA’s members are aware of the variety conversion and processing methods for sensor information, its goal concerning the usage both technological and structural-algorithmic methods for metrological performance improving of smart sensor systems within the industrial area is to represent the end user.

 

Click <here> or title of paper to start free download the full pages article.

   

Nikolay V. Kirianaki,

IFSA President,

Bandera str., 12,

79013, Lviv, UA

Http://www.sensorsportal.com

E-mail: ifsa@list.ru

IEEE 1451 Standards family

 

 

PRODUCT NEWS

 

High Sensitivity Acoustic Pressure Sensors

 

July 13, 2004, Depew, NY – New Series 103B ICP® Acoustic Pressure Sensors from the Pressure Division of PCB Piezotronics, Inc. measure pulsating, transient, and turbulent acoustic phenomena on transportation vehicles and other structures. Low profile, high-sensitivity sensors are ideal for applications such as automotive and aerospace wind tunnel testing, aerodynamic testing and analysis, aircraft cabin and cockpit noise testing, and acoustic fatigue testing on airframes.

 

ICP® style sensors feature built-in signal conditioning microelectronics to produce clean, low-impedance voltage output signals, and are offered in three configurations; pigtail wire solder connection, 10-32 top connector, and 3-56 side connector. Each configuration is available in sensitivities of 500 or 1,500 mV/psi (72.5 or 217.5 mV/kPa) and ranges of 10 or 3.33 psi (68.95 or 22.96 kPa) respectively. Rise time is less than 25 us, and the discharge time constant allows the sensors to follow transient events up to several hundred milliseconds in duration.

   

Dan Cummiskey, Division Manager

PCB Piezotronics, Inc.

3425 Walden Avenue

Depew, NY 14043-2495 USA

Tel: (716) 684-0002 ext. 2613, fax: (716) 686-9129

E-mail: dcummiskey@pcb.com

Acoustic Pressure Sensors 103B

 

 

Charge-Type High Temperature 4000 Series of EEPE Accelerometers

 

Princeton Junction, NJ, July 7, 2004 – Vibra•Metrics is pleased to announce the release of the new 4000 series of high temperature vibration sensors.  This series is well suited for turbine monitoring, jet/combustion engine applications, flue gas atomizers, and experimental applications.  Available immediately, three models are released to cover a variety of different temperature ranges and operating conditions.  Regarding the product line release, the Vibra-Metrics Sales and Marketing Manager, Scot Wlodarczak stated, “The 4000 series of charge-type accelerometers brings years of past high temperature development experience to the market with an outstanding product line.”  The model 4002 has 10 pC/g sensitivity with a frequency response to 5 kHz (±5%) and an integral hardline 1 meter cable to MIL style hermetic connector.  The model 4024 features 25 pC/g sensitivity, a top 3-PIN MIL connector, and 1/4-28 stud mounting, suitable for operation to 500F (260C).  The model 4300 features 20-25 pC/g sensitivity, an integral hardline cable, a square 4-hole mounting base, and FM approval that is suitable for operation to 550F (288C).

   

Mr. Scot Wlodarczak, Vibra·Metrics

Sales & Marketing Manager

195 Clarksville Road

Princeton Junction, NJ 08550

Tel: 609-716-4130, fax: 609-716-0706

 

 

EEPE Accelerometers

Strain Gage Signal Conditioners

    

July 13, 2004, Depew, NY – Series 8162 Strain Gage Signal Conditioners from the Force/Torque Division of PCB Piezotronics, Inc. provide conditioned, amplified analog voltage and current output for strain gage based sensors such as load cells and reaction torque sensors.  The units operate from 12 to 28 VDC power, and deliver ± 5 or ± 10 VDC and 4 to 20 mA output signals for recording, control, and analysis purposes.

 

These economical signal conditioners provide a wide output range from 0.45 to 11 mV/V, and are housed in fire-resistant, waterproof IP66 (NEMA 4x) enclosures.  Standard features include an integral shunt calibration switch with an internal user-configurable resistor, a two-pole active filter with 100 Hz cut-off, and watertight compression fittings for easy installation.

Peter Munschauer, Division Manager

Force/Torque Division

3425 Walden Avenue

Depew, NY 14043-2495 USA

Tel: (716) 684-0002 ext. 2405, fax: (716) 684-8877

E-mail: pmunschauer@pcb.com

Strain Gage Signal Conditioners

 

 

Piezoresistive Crash Test Accelerometer

   

July 13, 2004, Depew, NY – The Vibration Division of PCB Piezotronics, Inc. introduces Model 3901F3HB2000G, a lightweight, piezoresistive accelerometer that is ideally suited for automotive crash test instrumentation. Maximum range is ± 2000 g with a frequency range up to 5000 Hz (± 5%). Featuring an aluminum housing and integral cable, this 2.0 gm sensor minimizes mass loading and can fit into vehicle recesses, such as frame members, floor pan, and engine compartment, where crash data is required. Use this sensor for acceleration data in front, side, and rear crash testing.

Bill Coffta, Inside Sales Manager

Vibration Division, 3425 Walden Avenue

Depew, NY 14043-2495

Tel: (888) 684-0013 ext. 2247, fax: (716) 685-3886

E-mail: bcoffta@pcb.com

Crash Test Accelerometer

 

 

T2SR Time and Temperature Scanning Rheometer

 

The T2SR is a compact instrument with disposable probes and sample containers designed originally to determine the viscoelastic characteristics of materials such as epoxy resins as they cure. The instrument works by detecting the changes in amplitude and phase of a vertically-oscillating probe as a function of the rheology of the test specimen. The unit may be operated at fixed frequency and temperature (ideal for a quick, simple QA test), or rheological changes as a function of frequency or temperature may be explored.

 

The T2SR operates at frequencies from 0.5 Hz to 5 Hz, at temperatures to 400°C, and with specimen volumes from approximately 4 ml upwards. There is no upper limit on the volume of the test sample, provided that the system is calibrated under similar conditions, which makes the instrument highly useful in measuring the viscosities of materials containing, for example, high proportions of filler. The range of viscosities measured with the standard configuration is from 10 Pa.s to 10,000 Pa.s, although this range may be modified by altering geometries. The system detects changes in the elastic as well as the viscous properties of the specimen, allowing the calculation of dynamic viscoelastic parameters.

   Transparant

Roy Carter,

Celsum Technologies Ltd,

Willow House, Braemar Close,

Mountsorrel UK LE12 7ES

Tel: +44 (0)116-210-6319, 

Fax: +44 (0)870-120-9370

E-mail: sales@celsum.com

T2SR Rheometer

 

 

Dynamic Force Sensors Measure Fast-Rising, Short-Duration Events

 

Depew, New York -Piezoelectric force sensors from the Force/Torque Division of PCB Piezotronics, Inc. accurately measure dynamic force in compression, tension, and impact modes. Unlike strain gage sensors that are suitable for measuring slowly changing or static loads, dynamic force sensors possess the necessary response and endurance to accurately follow fast-rising, short-duration force events such as crimping, stamping, punching, forming, and drop and impact testing.

 

A variety of dynamic force sensor types are offered, including ring, three-component ring, link, impact, penetration, and strain styles. ICP~ and charge output versions are available; signal conditioning is also offered. Applications include tensile and fatigue testing, press force and machine process monitoring, package drop testing, force limited vibration testing, penetration testing, biomechanics research, and modal analysis.

   

Peter Munschauer, Division Manager

Force/torque Divison

3425 Walden Avenue

Depew, NY 14043-2495 USA

Tel: (716) 684-0002 ext. 2405, fax: (716) 684-8877

E-mail: pmunschauer@pcb.com

Dynamic Force Sensors

 

 

New Microphone Preamplifier Supports TEDS

 

Provo, UT -Larson Davis announces the PRM905 1/2" Microphone Preamplifier with a LEMa Connector and TEDS Support. This is an ideal preamplifier for acoustic engineers using the latest generation of analyzers which support "Smart Transducer Interface" IEEE P1451.4 with TEDS (Transducer Electronic Data Sheet) such as the Larson Davis Digital Sensing System (DSS), the LMS Pimento and the Brtiel & Kjrer PULSE. The PRM905 has a 7-pin LEMa connector and can be used with both prepolarized and externally polarized microphones. It is characterized by a wide frequency range and a low noise floor. Its low output impedance and high output current permit it to drive very long microphone extension cables.

   

John Carey,

Marketing Manager, Acoustic Test Products ,

Larson Davis, Inc.

1681 West 820 North

Provo, UT 84601

Tel: (888) 258-3222

E-mail: jcarey@larsondavis.com

Microphone Preamplifier PRM905

 

 

Signal Conditioners and Electronics Support TEDS Sensors

 

Depew, NY USA -The Electronics Division of PCB Piezotronics offers signal conditioning and other electronic products that support TEDS (Transducer Electronic Data Sheet) "smart" sensors (IEEE P1451.4 standard). TEDS sensors are mixed mode (analog/digital), self-identifying transducers that contain fields that fully describe the type, operation, and attributes of the transducer, and are typically used in large channel count modal and structural testing applications.

 

A line of rack mountable TEDS multi-channel and dual-mode signal conditioners are available for use with ICPil) and charge output vibration, pressure, and force sensors. In-Line Charge Converters convert charge mode piezoelectric sensor signals into low-impedance voltage signals for operation with ICPiI) sensor signal conditioners or readout devices which have an ICPiI) sensor input. In-Line Charge Converters are available with TEDS capabilities, which enable the devices to store and recall TEDS data for the sensor which is attached.

 

New In-Line TEDS Adaptor features an interface chip that which allows the identification, location, sensitivity, and other information relative to the attached sensor to be stored. The device allows ICPiI) accelerometers that do not have TEDS functionality to be used in TEDS applications.

   

Bill Andrews, Division Manager

Electronics Division

3425 Walden Avenue

Depew, NY 14043-2495

Tel: (716) 684-0002 ext. 2606, fax: (716) 684-0987

E-Mail: bandrews@pcb.com

Signal Conditioners

 

 

Model Order Reduction Software for MEMS-based Devices and Sensors

 

mor4ansys is a tool to perform model reduction for finite element models developed in ANSYS. The source code for mor4ansys is distributed under the GPL license.

 

The goal of our tool is to employ the recent mathematical model reduction algorithms for the linear finite elements models. In our experience for thermal and structural mechanics problems, the transient and harmonic response of the FE models up to a dimension of 300 000 can be well approximated by a reduced model of a dimension of less than 30.

 

The model reduction time is comparable with the ANSYS stationary solve. As result, model reduction can be used as fast solver for transient and harmonic simulation.

 

Evgenii Rudnyi

Simulation of Microsystems

Institut for Mikrosystem technology, IMTEK

Freiburg University

Georges-Koehler-Allee, Geb. 103

D-79110 Freiburg, Germany

Tel. (+49 761) 203 7383, fax (+49 761) 203 7437

 

 

 

 

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