PCB Piezotronics to show dual bridge load cells, high shock MEMS
and microphones at Advanced Engineering Show 2014
PCB Piezotronics,
a world leader in vibration, acoustic, pressure, force and torque
sensors will be exhibiting its wide range of industrial sensors,
accelerometers and microphones at the forthcoming Advanced Engineering
Show, NEC, Birmingham, UK, 11th & 12th November 2014
A new range of strain gauge dual bridge load cells for aircraft
structural, lifetime and fatigue testing will be shown along
with new microphone products including the 377B26 probe microphone
designed for R&D engineers needing to measure sound pressure
in confined areas. There will also be high-g shock MEMS accelerometers
capable of measuring long duration transient motion as well as
responding to and surviving extremely fast rise times typical
of applications such as down-hole oil exploration, pyroshock
and crash/impact environments.
PCB's new series 1400 strain gauge dual bridge, fatigue rated
load cells are designed specifically for iron bird and airframe
structural, lifetime and fatigue testing applications on wings,
fuselage, landing gear and other airframe components. Features
include dual outputs to provide sensor redundancy and the ability
to provide control feedback from one bridge while the other is
used for data acquisition. The new load cells are available in
multiple ranges, include thermal compensation and are supplied
complete with load bases as standard. The load cell including
load base comes complete with A2LA accredited calibration to
ISO 17025 in both tension and compression modes.
An additional feature - moment compensation - helps to maintain
accurate output from the sensor in the presence of eccentric
loading and side loads that are often experienced during highly
repetitive load testing cycles. A single shunt calibration resistor
is provided with each load cell to simplify calibration at the
test site.
PCB's latest probe microphone - model 377B26 - is designed for
R&D engineers who need to measure sound pressure in confined
areas. The probe tip diameter is extremely small measuring 1.3mm
which enables white goods, telephone, headphone, loudspeaker
and musical instrument manufacturers to make measurements in
small, confined and difficult-to-access areas that cannot be
accessed using traditional microphones, which are typically larger.
The small size of the probe tip also allows near field measurements
with minimal disturbance of the sound field. This enables more
accurate test results.
The probe microphone comprises four components: pre-polarised
microphone, preamplifier, housing and several probe tips of different
lengths. The components work together to provide a maximum operating
temperature of 800°C, much greater than traditional test
& measurement microphones. The high temperature capability
and small diameter make it an excellent choice for HVAC manufacturers
and test engineers performing leak detection tests at elevated
temperatures.
Other microphones on show will be models 378B02, 377B02 and 130E20,
available with the same high quality as always but now at more
competitive pricing than ever following improvements in the manufacturing
process. Designed for product testing in anechoic chambers or
environmental testing, model 378B02 is a ½ inch pre-polarised
free-field condenser microphone and ICP® preamplifier. Model
377B02 is a ½ inch free-field, polarised condenser microphone
cartridge that can be paired with any IEC compliant preamplifier.
Model 130E20 is a ¼ inch ICP Array microphone with integral
preamplifier designed for use in various applications including
acoustic holography, beam forming and general purpose audible
range test applications.
Offering the same high quality and market leading warranty, PCB
Piezotronics three microphones are also available through the
company's "On Your Desk Within 5 Days" programme.
PCB Piezotronics has also published a free Microphone Handbook
that provides an in-depth guide covering technology fundamentals
& microphone types, selecting & specifying microphones,
applicable standards, interfacing & design information, maintenance
for microphones & preamplifiers and future developments in
acoustics. This publication can be downloaded from http://www.pcb.com/micFlipbook
or is available as hard copy from PCB Piezotronics UK.
MEMS high-amplitude shock accelerometers will also be on show
including series 3501 and 3503 both available with ranges of
20,000 and 60,000g. These state-of-the-art miniature DC response
acceleration sensors are capable of measuring long duration transient
motion as well as responding to and surviving extremely fast
rise times typical of a high-g shock event. Both packaged and
OEM configurations are available to fulfil a variety of installation
requirements.
The lightly air-damped acceleration sensing element - micromachined
from silicon - is manufactured with the latest advances in etching
techniques using the latest equipment. This tiny element - measuring
just 2.5 x 1.7 x 0.9mm - incorporates a seismic mass, protective
over range stops and a full active piezoresistive Wheatstone
bridge.
The 3501/3 series MEMS sensors are intended to fulfil the most
demanding aerospace, industrial and commercial application requirements.
Applications include consumer electronics drop testing, down-hole
oil exploration, tool manufacturers, pyroshock and crash/impact
environments.
September 2014
