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Resonant Frequency Vibration Testing with Concrete Frequency Meter
Introduction to Resonance Testing
Resonance testing is used to evaluate how materials and structures respond to vibration. It works by applying a controlled force, such as an impact or vibration, and measuring the response.
When the applied frequency matches a structure’s natural frequency, resonance occurs. This can cause excessive vibration, fatigue, or damage. Identifying resonant frequencies helps engineers improve safety and durability.
Resonance testing is widely used in vibration testing equipment applications for quality control and material evaluation.
What Is Natural Frequency
Natural frequency is the rate at which a structure vibrates when disturbed. It depends on:
- Mass
- Stiffness
- Damping
Most structures have multiple natural frequencies. Changes in load, geometry, or support conditions can shift these values. If an external force matches a natural frequency, vibration levels increase rapidly.
Understanding natural frequency is essential for structural safety and long-term performance.
Concrete Frequency Meters
The Emodumeter™ Concrete Resonant Frequency Meter is a non-destructive testing device used to evaluate concrete properties. It determines:
- Young’s modulus
- Modulus of rigidity
- Poisson’s ratio
It is commonly used in laboratories for freeze-thaw durability testing and strength evaluation. Certified MTP supplies concrete frequency meters designed for accurate resonance analysis.
How the Testing Works
The meter applies a controlled impact using hardened steel balls. An accelerometer captures the vibration response.
The system measures:
- Longitudinal modes
- Flexural modes
- Torsional modes
Results are displayed as a frequency spectrum and can be stored for later analysis.
Key Features
- Measures three vibration modes
- Frequency range: 10 Hz to 40 kHz
- Automatic frequency display
- Internal data storage
- PC data transfer capability
- Backlit screen for field and lab use
These features support accurate non-destructive concrete testing.
Included Components
- Concrete Resonance Frequency Meter
- Accelerometer
- Six hardened steel balls
- Specimen bench fixture
- Emodulinx software
- RS-232 cable
- Universal charger with adapter
- Protective carrying case
Everything needed for immediate testing is included.
Sample Size Capacity
The meter supports concrete specimens up to:
- Cross-section: 6 in (150 mm)
- Length: 1.75–28 in (45–700 mm)
This makes it suitable for standard lab samples and research testing.
Power and Operation
- Rechargeable battery
- 4–10 hours of continuous use
- Operating temperature: 0°C to 40°C
The system is portable and well-suited for laboratory environments.
Related Concrete Testing Tools
For proper specimen preparation and vibration control, Certified MTP also offers:
These tools help ensure consistent and reliable test results.
Resonant frequency vibration testing is a reliable method for evaluating concrete performance and durability. The Concrete Resonant Frequency Meter provides accurate, non-destructive measurement of key material properties. With simple operation, wide frequency range, and complete accessories, it is an essential tool for concrete laboratories and research professionals.
