Typical Applications

Test result – pass

Test result fail – crack

Test result fail – low hardness

Test result fail – high hardness

Classification results betweeen good parts and a defective group (train mode)

Distribution of a relative feature is used to find accept ranges (train mode)

ARI is designed to detect defects such as:

  • Cracks
  • Cavity
  • Cold shuts
  • Hardness deviations
  • Low nodularity
  • Residual stress
  • Out-of-tolerance dimensions


  • High speed, accurate and repeatable measurements
  • Easy to use and user friendly interface
  • Classification of parts based on advanced data modeling and multivariate statistics methods
  • Temperature compensation of resonant frequencies using infrared thermometer
  • Automatic impact using dual electromechanical hammers with adjustable strike force
  • Expandable impact unit to dual hammers to excite the part sequentially at different positions
  • Input/Output control signals for trigger, alarm or other on-line process
  • Dust-proof and weather resistant enclosure
  • Customized fixture design with pneumatic control for part mounting
  • Report generation, including statistical analysis

Applications of the ARI system in automobile industry can be summarized as:

Material Defect Type
Cast Iron Nodularity, Hardness, Crack, Porosity, Cold Shot, Detached Layers
Steel Crack, Hardness
Powder Metal Crack, Raw Material Contaminants
Forged Crack, Porosity, Missed Strike, Hardness, Heat Treatment

Natural frequencies of a good part and the accept ranges (test mode)

Frequency prediction results of a defective part (test mode)

Ratio of frequencies of a good part and the accept ranges (test mode)

Ratio of frequencies of a defective part and the accept ranges (test mode)