Measure Torque and Speed in a Small, Affordable Package That Has One Moving Part

The Lebow 1700 series of transducers uniquely combine optical and inductive technologies to yield high-speed data capture and enhanced long-term reliability. Using two completely different technologies means there is no interference between the input and output signals. The optical transmission method is designed to reduce susceptibility to external influences. Traditional torque transducer designs use slip rings that have reliability, accuracy and longevity limitations. At high speeds, slip rings can fail prematurely and lift off, causing inaccurate measurements. At low speeds, slip ring friction can adversely affect the results from low-level torque measurements. In the 1700 series, power to the strain gauges is transmitted through inductive coupling. Transfer of data from the rotor is achieved through a proprietary high-speed optical link.

There are two optional features. The first is speed detection with a sensing range up to 10,000 RPM. The second is angular detection with a sensing range up to 3,000 RPM. Adding these two features means the unit can measure torque and speed. This can eliminate the need for additional sensors and can give engineers the ability to investigate torque trends in more detail in a variety of potential applications. The angle detection version can be used to show how torque changes with changing speed. All data can be sent to a computer for further analysis.


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