Description
With the acoustic quality test stand it is possible to fully automatically determine the modal parameters (natural frequencies and damping) of various technical components, to detect deviating parts and to mark/eject them.
This test is particularly essential for the final inspection of aluminum components (for blowholes, coarse grain formation, and geometric deviations), brake pads (for shape deviations and pad detachment), and brake discs (for coating and cracks). In quality control during production, these modal parameters are quickly determined characteristics. MAUL-THEET offers a complete system that performs these measurements fully automatically, evaluates them, and, if necessary, marks or ejects components that deviate from the specified specifications.
Advantages & Innovations
- Cost and time savings thanks to low personnel costs
- Automated test system for determining natural frequencies and damping
- 100% testing according to SAE J2598
- Fully automatic measurement with automatic evaluation
- User-friendly software
- Very short cycle times
- Non-destructive testing
- DAkkS calibration (DIN EN ISO/IEC 17025) possible
- Software guided measurement
- Setting frequency bands for quality control (good/bad statement)
- Freely selectable dB values for the attenuation calculation
- Quality factor for damping value
- Excitation by automatic modal hammer
- Vibration measurement with microphone
- Frequency range up to 100kHz
- Frequency resolution < 1Hz to 20kHz
- Automatic log generation
- SQL database or central database through LabLINK
- Data export via LabLINK, ASCII files
Application & Integration
- Quality control
- In-Line
- End-Of-Line
- Material testing
- Series testing of components
- Series testing of components
Components
Excitation unit
The broadband excitation is carried out with an automatic modal hammer
- Frequency ranges up to 40kHz
- Impact forces up to 2500N
- High reproducibility
Vibration sensor
The AQC can be operated with the following vibration sensors
- One or more microphones
Measurement data acquisition
4-channel measuring system with synchronous scanning
- AC, DC and IEPE coupling
- Anti-aliasing filter
- 24-bit resolution
- Frequency ranges 1 to 100kHz
- Frequency resolution 100 to 26500 FFT lines
Windows PC
- Standard or industrial PC, also according to customer requirements, with Windows 10/11
Software
The AQC software controls the entire testing process. It includes automatic measurement of test pieces in series, analysis, and communication with the production line control system.
Specification of the test object
- Component identification via bar or QR code
- dB values for attenuation calculation (0.5 to 3dB)
- Frequency range 1 to 40kHz selectable
- Frequency resolution (number of FFT lines) selectable
- Frequency bands and permissible tolerance ranges
Measuring sequence in series
- Start of the measuring process after component positioning has been completed
- Averaging
- Determination of quality parameters (frequency, attenuation, etc.)
- Transmission of the quality decision to the manufacturing and production facility
Automatic measurement procedure
- Automatic component positioning
- Triggering the automatic modal hammer
- Measurement of impact force and vibration response
- FRF averaging
- Peak picking, attenuation calculation and quality assessment
- Control for component separation
Output of the test data
- SQL database connection according to customer specifications
- LabLINK database connection according to customer specifications
- SAP connection according to customer specifications
- Printer, PDF, Excel, CSV, etc.
What we can do for you
In addition to manufacturing and supplying standard measurement systems for determining natural frequency and damping, we design, plan, and develop customized solutions tailored to your requirements. We are also happy to perform the measurements for you as a service.
Please contact us, we will be happy to make you an offer.