A device and principal method for measuring flow through a pipe for liquid and compressed gas. In an embodiment, the device is comprised of eccentric disk, rotation sensor, torque/stress sensor, coil spring, track rod, supports, and a digital processor. The processor determines the flow based on measured torque/stress, rotation, and other pre-determined parameters and relationship equations. The processor also provides data communication with other controllers and human-machine interface devices. In one simplified option, the arm may be fixed in one position and the rotation sensor is eliminated. In another simplified option, the torque sensor is removed. The compression of coil spring is measured by the rotation sensor. The torque is then determined using the coil spring performance and measured coil spring compression. The torque based flowmeter can be implemented to any industrial corrosive liquids, water, and gas with or without suspended solids.

A method and apparatus for measuring and evaluating pedaling efficiency of a cyclist. Instantaneous measurements of torque exerted through crank pedal arms are correlated with crank pedal arm positions through one or more complete crank rotations. Average torque exertion on the crank arms is determined for specific sectors of the entire crank rotation and the resulting values are compared. For example, the average torque through the top half of a crank rotation is compared with the average torque for an entire crank rotation, with a comparison expressed, for example, as a ratio. A numerical result of certain comparisons is thus obtained as guidance for future training of the cyclist to improve performance.

A method and apparatus for measuring and evaluating pedaling efficiency of a cyclist. Instantaneous measurements of torque exerted through crank pedal arms are correlated with crank pedal arm positions through one or more complete crank rotations. Average torque exertion on the crank arms is determined for specific sectors of the entire crank rotation and the resulting values are compared. For example, the average torque through the top half of a crank rotation is compared with the average torque for an entire crank rotation, with a comparison expressed, for example, as a ratio. A numerical result of certain comparisons is thus obtained as guidance for future training of the cyclist to improve performance.

A torque estimating device of a gas compressor includes a reference torque characteristic storage unit that stores a reference torque characteristic of the gas compressor as a torque characteristic of the gas compressor in a specific operation state, a torque setting unit that sets a torque corresponding to an input speed of rotation of the gas compressor and pressure of a refrigerant discharged from the gas compressor, on the basis of the reference torque characteristic stored in the reference torque characteristic storage unit, and a torque correcting unit that sets a torque at startup of the gas compressor among the torques set by the torque setting unit, by correcting the torque set by the torque setting unit, in accordance with the speed of rotation and an elapsed time from startup.

A torque estimating device of a gas compressor includes a reference torque characteristic storage unit that stores a reference torque characteristic of the gas compressor as a torque characteristic of the gas compressor in a specific operation state, a torque setting unit that sets a torque corresponding to an input speed of rotation of the gas compressor and pressure of a refrigerant discharged from the gas compressor, on the basis of the reference torque characteristic stored in the reference torque characteristic storage unit, and a torque correcting unit that sets a torque at startup of the gas compressor among the torques set by the torque setting unit, by correcting the torque set by the torque setting unit, in accordance with the speed of rotation and an elapsed time from startup.

A dynamic load system includes a first electric machine simulating a load, a second electric machine, a coupling device for mechanically coupling the first electric machine to the second electric machine, a control unit with a processor and connected to the first electric machine and the second electric machine, wherein the control unit is configured to control the first electric machine and the second electric machine, wherein a reference value of the second electric machine is utilized to achieve a specific performance of the first electric machine.

A dynamic load system includes a first electric machine simulating a load, a second electric machine, a coupling device for mechanically coupling the first electric machine to the second electric machine, a control unit with a processor and connected to the first electric machine and the second electric machine, wherein the control unit is configured to control the first electric machine and the second electric machine, wherein a reference value of the second electric machine is utilized to achieve a specific performance of the first electric machine.

A method for detecting stick-slip in a drillstring includes (a) measuring a parameter that is a function of a torque applied to the drillstring by a top drive system over a selected time period, the measuring being performed by at least one surface sensor that produces measurement data including torque values over a frequency range; (b) filtering out measurement data that has a frequency outside a selected frequency band, the selected frequency band including a resonant frequency of the drillstring; (c) identifying a minimum and a maximum torque value in the filtered measurement data and determining a difference of these two values; (d) determining a surface stick-slip index by dividing the difference of the maximum and minimum torque values by an average torque value over the selected time period; and (e) displaying the surface stick-slip index on a display.

The present disclosure generally relates to a method for making up a tubular joint. The method includes rotating a first tubular relative to a second tubular to engage the first and second tubulars while measuring a torque between the first and second tubulars, calculating a set point of a relative rotational speed between the first and second tubulars using the measured torque, and using the calculated set point with a closed-loop controller to control the relative rotational speed between the first and second tubulars.

The present disclosure generally relates to a method for making up a tubular joint. The method includes rotating a first tubular relative to a second tubular to engage the first and second tubulars while measuring a torque between the first and second tubulars, calculating a set point of a relative rotational speed between the first and second tubulars using the measured torque, and using the calculated set point with a closed-loop controller to control the relative rotational speed between the first and second tubulars.