Displacement Transducers
Dynamic Strain Transducer
Applications
The Dynamic Strain Transducer is used for structural testing and recording strains on…
✓ Steel structures
✓ Post-tensioned and pre-stressed concrete structures
✓ Reinforced concrete structures
✓ Timber structures
✓ Fibre reinforced polymer structures
✓ Any structure in which a short-term live-load can be applied.
The most direct approach to quantifying live-load stresses in a structural member is to record the induced strains, which are typically measured using foil strain gages. Dynamic Strain Transducer offers a much simpler, more effective solution; it is delivered pre-wired in a rugged housing that is easy and quick to install in any weather.
Advantages of Dynamic Strain Transducer
The Dynamic Strain Transducer is easily installed and may be attached to steel, pre-stressed and reinforced concrete, and timber members in about 5 minutes, making it possible to instrument and test a structure with 64 strain channels in one day.
The gage length can be increased to provide “average” strains on reinforced concrete that may have cracks or are otherwise non- homogenous.
Output of Dynamic Strain Transducer is approximately 3 times higher than the typical quarter bridge foil gage installation. This allows for an improved signal-to-noise ratio, which makes higher-resolution measurements possible.
System Components
✓ The Dynamic Strain Transducers can be used with data acquisition systems that support full wheat stone bridge sensors.
✓ C-Clamps or threaded mounting tabs and a quick-setting adhesive are used to attach.
✓ It is fully waterproof, with a heavy-duty cable and, where required, a quick-lock connector.
Specifications
| Parameter / Type | Specifications |
|---|---|
| Effective Gage Length | 76.2 mm. (Other options are available) for use on R/C structures |
| Overall Size | 110.5 × 31.2 × 13 mm |
| Cable Length | 3m |
| Material | Aluminium |
| Circuit | Full Wheatstone Bridge with 4 actives 350-ohm foil gages, 4-wire hook-up |
| Accuracy | ±2%, individually calibrated |
| Strain Range | ±4000 με (Calibrated to ±2000 με) |
| Force required for 1000 με | Approximately 76 N |
| Sensitivity | Approximately 500 με /mV/V |
| Weight | Approximately 85 g (3 oz.) |
| Environmental | Built-in protective cover, water resistant |
| Temperature Range | −50°C to +120°C |
| Cable | BDI RC-187: 22 gage, two individually shielded pairs with drain |
| Options | Fully waterproofed, Heavy-duty cable, Special quick-lock connector |
| Attachment Methods | Mounting tabs and adhesive, C-Clamps masonry or wood screws |
| Manual | Fully Documented in English |