Winterthur, September 2023 - With the KiTorq DS, Kistler developed the first torque measuring system for automotive drive shafts that features wireless data transmission. The transmitter, which covers the strain gauge sensor, is attached to the shaft via adapter sleeves. This allows users to easily remove the unit to change and recharge the batteries or reuse the transmitter on another vehicle. The corresponding receiver unit can process input of two transmitters and receive the signal of the wheel pulse transducer of type CWPT from Kistler to directly measure wheel speed, acceleration and calculate power.
Especially in the development of electric vehicles, torque measurements on drive shafts become increasingly important since they enable engineers to better calculate the efficiency of the entire power train including recuperation. Kistler is now offering a new solution that makes these measurements significantly easier. The new wireless torque measurement system consists of two transmitter units and a receiver unit. The unique design of the transmitter unit features two half-shells that close around the shaft. While the telemetry half-shell is sending the data to the onboard evaluation electronics, the other shell holds the replaceable and rechargeable battery.