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Seismic Accelerometers
sense ground vibration.
See Also: Seismic, Seismometers, Seismic Arrays, Earthquake
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Digital Magnetic Compass
The SeaTRAX with PNI’s high sensitivity magnetometers and accelerometers is a COTS high- performance heading sensor for seismic streamers and towed arrays.
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Force Balanced Accelerometer
PA-23, PA-23BH, S-230
The Geotech Model S-230 is a high resolution, 1-component, force balanced accelerometer capable of meeting the noise and stability requirements of the most demanding seismic studies. It features a very wide frequency response (DC to 90 Hz) and an internal calibration coil.
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High Sensitivity Accelerometers
Metra Mess- und Frequenztechnik in Radebeul e.K.
The piezoelectric accelerometers on this page are intended for the measurement of lowest vibrations. Typical fields of application include the monitoring of buildings, dams, bridges, oil platforms and pipelines. These sensors are often called seismic accelerometers because they are used to monitor construction activity, volcanoes and earthquakes. Their high sensitivity is achieved -unlike other high sensitivity accelerometers- by the sensing element itself and not by internal amplification. From this results highest resolution and lowest noise.
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Linear Accelerometers
Columbia Research Laboratories
Columbia Research Labs line of Force Balance Linear Accelerometers offers low cost, high performance, general purpose single axis accelerometers that are ideal for DC and low frequency measurements, with both voltage and current signal outputs available. Also offered are Columbia's Solid State Sensors and our specialized Airborne Sensors that generate outputs specifically designed to operate from +24 to +32VDC aircraft power, that is excellent for airborne telemetry applications. And our Low Noise Sensors are designed for use in seismic, low level, low frequency motion studies.
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Miniature
Columbia Research Laboratories
This group is made up of the 6000 and 7000 Series Accelerometers. The 6000 Series offers detachable cables and connector assemblies, a special inverted seismic element for mechanical isolation and other features normally available only on standard size sensors. The 7000 Series are true "shear-mode" design accelerometers which offer performance characteristics and accuracies normally only available with standard size accelerometers. High temperature models of these series are available and will operate to +500°F. For best performance use with Columbia Model 4601 Charge Amplifier or Model 5810 Inline Charge Converter.
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Accelerometers
ROGA-Instruments provides a broad range of accelerometers for General applications, Seismic measurements, High acceleration and shock, Light test objects, Triaxial measurements and Industrial applications.
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Triaxal Seismograph
BC 1313 TRIAXIAL SEISMOGRAPH
BC 1313 seismographs are seismic accelerometers, the parameter measured – vibration acceleration. For BC 1313 seismic transducers, the system is provided for sensing element electrical stimulation using an actuator to determine conversion ratio true value during periodic recalibration without dismantling. Power check system is also allowed for in BC 1313 seismographs.
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Accelerometers
Columbia Research Laboratories
The force balance accelerometer has a classical critically-damped, second-order frequency response. There is no peaking in the response but simply a smooth roll-off above the natural frequency. This property along with the excellent characteristics of the "HP" torquer design makes Columbia accelerometers the best choice for demanding applications where precise DC and near-DC measurements are needed in demanding shock and wide band vibration environments. Columbia force balance accelerometers are available to cover virtually all applications. Low noise, high output units can be used for seismic structure motion studies while miniature, high range versions are optimum for measuring more violent high G environments encountered in many industrial, aircraft and missile applications.
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Seismic Transducers Calibration System
Calibration of the seismic sensors should be conducted in the low-frequency domain, which means, that the relative method used for calibration of the vibration transducers is not applicable since it does not guarantee the required accuracy level. The problem is that the reference accelerometers have uneven AFR characteristic in the low-frequency domain. Thus, calibration of seismic transducers requires implementation of a different approach.
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Piezoelectric
Columbia Research Laboratories
The Columbia product line of piezoelectric accelerometers is widely known for reliable performance, quality and ruggedness and is always expanding to meet the unique challenging and ever changing requirements of our customers. The selection of specifications, sizes and configurations is large and diverse and suitable for use on many applications requiring features such as, high performance, high accuracy, high temperature, seismic event, 4-20mA output, airborne, miniature size and general purpose use.
