System for checking the correct operation of braking devices on a test stand for industrial screwdrivers comprising a plurality of hydraulic brakes (F), to which the screwdriver is associated with, suitably controlled by a hydraulic circuit comprising a pump (P), a pressure regulating valve (VP). Each brake is provided with external measurement transducers (TR) connected to an electronic control board (SP). An electronic processor (U) that communicates with such board and controls such hydraulic circuit, such pump and such valve, comprises a suitable control program stored therein.

An inspection device for displacement sensor includes a sequence data obtaining unit configured to obtain sequence data as an output value of the displacement sensor according to input continuously changing in a constant temporal gradient; a difference calculation unit configured to obtain a difference between a value at a certain point in the sequence data and a value at a point advancing from the point by a predetermined evaluation pitch to calculate difference sequence data; a moving average calculation unit—configured to obtain a moving average of a predetermined number of data centered at a certain point in the difference sequence data to calculate post-averaged sequence data; and a determining unit configured to determine that the displacement sensor is normal when an amplitude of an output value of the post-averaged sequence data is smaller than a determination threshold for amplitude.

An inspection device for displacement sensor includes a sequence data obtaining unit configured to obtain sequence data as an output value of the displacement sensor according to input continuously changing in a constant temporal gradient; a difference calculation unit configured to obtain a difference between a value at a certain point in the sequence data and a value at a point advancing from the point by a predetermined evaluation pitch to calculate difference sequence data; a moving average calculation unit—configured to obtain a moving average of a predetermined number of data centered at a certain point in the difference sequence data to calculate post-averaged sequence data; and a determining unit configured to determine that the displacement sensor is normal when an amplitude of an output value of the post-averaged sequence data is smaller than a determination threshold for amplitude.

A calibration process for use in calibrating intelligent cable modules. A separate calibration load cell is provided. This device is placed in the load path for the cable on which the intelligent cable module is installed. The calibration load cell then establishes a communication link with the intelligent cable module. An iterative series of loading cycles are started. Tension data as measured by the calibration load cell is used to create a calibration curve. This calibration curve is used to correlate internal measurements made by the intelligent cable module against a desired value—such as cable tension.

A calibration process for use in calibrating intelligent cable modules. A separate calibration load cell is provided. This device is placed in the load path for the cable on which the intelligent cable module is installed. The calibration load cell then establishes a communication link with the intelligent cable module. An iterative series of loading cycles are started. Tension data as measured by the calibration load cell is used to create a calibration curve. This calibration curve is used to correlate internal measurements made by the intelligent cable module against a desired value—such as cable tension.

A system and method of adjusting a zero reference may comprise retracting ram of an actuator coupled to a load cell from a first position to a second position. The system and method may comprise reporting a measurement by a load cell, in response to the actuator being in a second position. The system and method may comprise calculating a force being measured by t the load cell. The system and method may comprise creating a zero reference offset value based on the calculation, in response to the force calculation resulting in a non-zero force calculation. The system and method may comprise adjusting a zero reference value of the load cell by the zero reference offset value.

A system and method of adjusting a zero reference may comprise retracting ram of an actuator coupled to a load cell from a first position to a second position. The system and method may comprise reporting a measurement by a load cell, in response to the actuator being in a second position. The system and method may comprise calculating a force being measured by t the load cell. The system and method may comprise creating a zero reference offset value based on the calculation, in response to the force calculation resulting in a non-zero force calculation. The system and method may comprise adjusting a zero reference value of the load cell by the zero reference offset value.

Described herein is a method and system for testing a force or strain sensor in a continuous fashion. The method employs a sensor, a test fixture, a load cell, a mechanical actuator and tester hardware and software to simultaneously record signal outputs from the sensor and load cell as functions of time. The method provides time synchronization events for recording data streams between, for example, a linear ramp of the force on, or displacement of, the sensor and for extracting performance characteristics from the data in post-test processing.

A method for determining sensor parameters of an actively-driven sensor system may include performing an initialization operation to establish a baseline estimate of the sensor parameters, obtaining as few as three samples of a measured physical quantity versus frequency for the actively-driven sensor system, performing a refinement operation to provide a refined version of the sensor parameters based on the as few as three samples, iteratively repeating the refinement operation until the difference between successive refined versions of the sensor parameters is below a defined threshold, and outputting the refined sensor parameters as updated sensor parameters for the actively-driven sensor system.

A method for determining sensor parameters of an actively-driven sensor system may include obtaining as few as three samples of a measured physical quantity versus frequency for the actively-driven sensor system, performing a refinement operation to provide a refined version of the sensor parameters based on the as few as three samples and based on a linear model of an asymmetry between slopes of the measured physical quantity versus frequency between pairs of the as few as three samples, iteratively repeating the refinement operation until the difference between successive refined versions of the sensor parameters is below a defined threshold, and outputting the refined sensor parameters as updated sensor parameters for the actively-driven sensor system.