Technologies for Force Measurement
Low space requirements but outstanding possibilities: Thin-film sensors are the first choice when complex requirements have to be fulfilled. Instead of using an adhesive bond, a sputter process is used to achieve an atomic bond between the measuring bridge (thin-film strain gauge) and the measuring cell body (Ø 7 mm). The thin film sensor can be placed in the ideal position within a force flow even with minimal mounting space. In a laser welding process, it is connected to the deformation body in a force- and form-fit manner.
- Both cost-effectiveness and maximum precision through automated production
- constantly high quality
- extreme long-time stability
- no creep response integrated amplifier
High economic efficiency for custom-made products and OEM applications
Force Transducers with Adhesive Bonded Strain Gauges
Strain gauges operate in accordance with the principles of piezoresistive effect and Thomson effect: compression reduces, elongation increases the electrical resistance. A resistance meander wire – mostly made of constantan – is welded onto a strip of foil. This foil strain gauge is bonded to the actual deformation body into which the force is led. Cross-wiring of the strain gauge (Wheatstone bridge) optimizes the signal output and measurement precision.
Advantages: The strain gauge systems offer a great geometric variability at high precision and are well suited for registering the lowest forces. The available measuring ranges are between 10 N and 5,000 kN and above.
Hydraulic Force Transducers
The hydraulic force measuring technology uses a piston-casing combination provided with different seals that act as a force transducer. The effective force is the product of area and pressure. Gauges, pressure transmitters or pressure gauges with contact arrangement are used for indicating the force. Hydraulic load cells are robust and, depending on the measuring instrument, they reach accuracies of ±0.5% / ±1% / ±1.6% of F.S.
Advantages: Hydraulic force transducers as autonomic systems are self-operated. tecsis offers appliances for hydraulic force measuring systems that allow the removal of the measuring instrument under pressure and without a machine standstill or fluid loss. Available measuring ranges: from 0 ... 160 N to 0 ... 10000 kN.