Acoustic Emission Sensors

Description:

AE sensors are used in a wide range of fields, including the inspection of manufactured prod-ucts, monitoring the safety of structures, and the development of new materials.

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  • Introduction

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    Introduction to Acoustic Emission Sensors
    The application of AE Sensors
    Example of Measuring system
  • Selection Guide
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    Note：The shape of a sensor depends on the frequency used.
    Model name calling method (Resonance model)

    Glossary
    Sensitivity

    The AE sensor’s sensitivity (dB) is represented as the output voltage (V) per vibrational particle velocity (m/s). An AE sensor (standard sensor) has a sensitivity of 50 to 70 dB (0dB=1V/m/s), i.e. 300 to 3000 V/m/s. The tolerance for sensitivity is fixed at ± 3 ～ 6dB.

    Single-end and Differential

    General-purpose AE sensors are of single-end type. Differential type AE sensors are used to cope with heavy electric noise.
    A differential type AE sensor requires a differential amplifier. Moreover, a particular cable must be used depending on the types of the AE sensor’s output connector and the differential amplifier’s input connector.

  • Resonance model AE sensors

    S type (Standard, single-end)

     •    Value includes capacitance of low-noise cable 1m（90pF）

    A type (Small, single-end)

     •    Value includes capacitance of low-noise cable 1m（90pF）

    Optional cable

    AE303SAE304S

    AE503AAE204A

    D type (Standard, Differential)


    Value includes capacitance of low-noise cable 0.5m（45pF）

    AD type (Small, Differential)

    Value includes capacitance of low-noise cable 1m（90pF）

    Optional cables（Choose a cable adapted to the amplifier installed.）

    Optional cables（Choose a cable adapted to the amplifier installed.）

    AE204D

  • Microminiature AE sensors

    M type (Resonance model)

    • 1：Value includes capacitance of cable
    • 2：Without cable

    MW type (Wide bandwidth model)

    • 1：Value includes capacitance of cable
    • 2：Without cable

    M31M5W

  • Wide bandwidth AE sensors

    S type (Single-end)

    • Value includes capacitance of low-noise cable 0.5m（45pF）

    Note：Type MW and type REF are also available.

    1045S5045S

    D type (Differential)

    • Value includes capacitance of low-noise cable 0.5m（45pF）

    1045D



  • R-CAST AE sensor system
    The R-CAST AE Sensor System is designed to detect microscopic destructions. This is a result of the joint development activities of Fuji Ceramics and Research Center for Advanced Science and Technology of The University of Tokyo. The use of an FET head amplifier and a special preamplifier allows this sensor system to achieve a sensitivity 55 dB higher than a conventional AE sensor.

    In most case,the ceramics,representative new material,is a kind of brittleness material.A conventional AE sensor,used new material,was hard to delect AE,since the objects were mainly for metal materials. The R-CAST AE Sensor System can detect microscopic cracks of several μm.


    MA type (Built-in head-amplifier)


    • 1：These values are observed while an A1002 preamplifier is operating.
    • 2：Without cable

    M204A

    Examples of measuring system

    Only an A1201(A1002) type preamplifier can be used for this system.

    • •    A1201/W130×D180×H64mm
    • •    A1002/W80×D130×H35mm
    • •    V3002/W140×D180×H70mm
  • Built-in preamplifier AE sensors and others

    Amplifier built-in type

    AEXXXSA40-BNC

    • AE303SA40-BNC-MHAE304SA40-BNC

    Reference use

    • 1：Value includes capacitance of low-noise cable 1m（90pF）“LN-023 1m Miniature-BNC”
    • 2：Value includes capacitance of low-noise cable 0.5m（45pF）“LN-023 0.5m BNC-BNC”

    REF-VL

    REF10M

    REF-VL

  • Industrial AE sensors

    • 1：Without cable
    1045SWA
    AE204SW
    1045SWH
    AE204DH

  • Mounting Adapter
    The AE sensor must be mounted to the subject being measured in such as way that the AE signals are efficiently transmitted, allowing the sensor to work at its best level of performance.
    AE sensors are usually bonded to the subject; however, with insulated sensors where the wear plate is alumina, there is the risk of breakage when the sensor is removed. These sorts of sensors should be used in applications where they will be permanently mounted.


    Magnetic holders

     Screw-mounted holders

    (　) Dimention of frange

    Wave guide

    Magnetic holder
    Wave guide
  • Calibration

    Fuji Ceramics Corporation is the only company in Japan that applies absolute sensitivity calibration methods.


    Calibration Method of AE Sensor


    Two major calibration methods for AE sensors are the absolute sensitivity calibration and the relative sensitivity calibration. The latter is applied to obtaining only reference data. This section describes the outline of only the former.

    Sensitivity check of AE sensors by customer

    Model REF-VL and REF10M, can be used as a signal source for simplified checking of your installed AE sensors.