| 摘要 |
In an assembly comprising a (rotary) actuator (16) mounted on a body (12), e.g. of a valve fitted in a pipeline (14), and having a drive shaft (20) to actuate the valve or other driven element within the body, the actuator is mounted on the body (12) by means of a member (18), e.g. a cylindrical mounting stool, which is provided with strain gauges (28) to measure the reaction force acting on the mounting member (18) in response to the output force applied by the actuator. The assembly thus allows the direct derivation of the output torque or thrust of the actuator (16), which is equal and opposite to the reaction force measured by the strain measuring devices (28). The dimensions of the mounting member (18) may be chosen to give the same strain therein as in the drive shaft (20). The strain gauge output signal is damped to remove transients, but the undamped signal may also be used as a measure of vibration in the assembly. <IMAGE>
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