A flow rate of a gas is determined based on a predetermined relational expression including, as parameters: the flow rate of the gas; diameter and length of a hole; upstream and downstream pressures; and temperature, molecular weight, viscosity coefficient, and specific heat ratio of the gas. Additionally, setting conditions for a type and temperature of the gas, the length of the hole, and the pressures upstream and downstream from the hole are set; the relational expression is used to obtain the correspondence relationship between the diameter of the hole and the flow rate of the gas flowing through the hole; an approximation function approximating the obtained correspondence relationship is determined; the flow rate of a gas passing through a test piece having a hole of an unknown diameter is measured; and the diameter of the hole is estimated, based on the measured flow rate and the approximation function.

A method is provided for non-intrusively determining cross-sectional variation of a fluidic channel. The method includes creating a pressure pulse in a fluidic channel using a hammer to strike an external surface of a fluidic channel. The method also includes sensing, by one or more sensors, reflections of the pressure pulse; and obtaining, from the one or more sensors, a measured pressure profile based on the sensed reflections of the pressure pulse. A forward model of cross-sectional variation of the fluidic channel is generated based on a baseline simulation. Using the forward model, a simulated pressure profile is generated. Using the measured pressure profile and the simulated pressure profile, an error is determined. When the error is outside a predetermined threshold, the forward model is updated based on the error. An estimate of cross-sectional variation of the fluidic channel based on the forward model is displayed.

A method is provided for non-intrusively determining cross-sectional variation of a fluidic channel. The method includes creating a pressure pulse in a fluidic channel using a hammer to strike an external surface of a fluidic channel. The method also includes sensing, by one or more sensors, reflections of the pressure pulse; and obtaining, from the one or more sensors, a measured pressure profile based on the sensed reflections of the pressure pulse. A forward model of cross-sectional variation of the fluidic channel is generated based on a baseline simulation. Using the forward model, a simulated pressure profile is generated. Using the measured pressure profile and the simulated pressure profile, an error is determined. When the error is outside a predetermined threshold, the forward model is updated based on the error. An estimate of cross-sectional variation of the fluidic channel based on the forward model is displayed.

In the case of a measuring method for measuring the geometry of a drilled hole in a workpiece, a measuring system is used which has a measuring unit (110) which, in the state which is set up ready for operation, has a measuring mandrel (120) which can be moved bidirectionally along a travel path parallel to a measuring mandrel axis (125) by means of a linear drive. The measuring mandrel (120) is calibrated at least once with the use of a reference device (200) by way of at least one reference element (230-1, 230-2) of defined internal dimensions, by the measuring mandrel (120) being moved by means of the linear drive into a calibrating location, in which a measuring sensor of the measuring mandrel is arranged in the region of the reference element. During measuring operation, the reference device (200) is arranged in a neutral location outside the travel path of the measuring mandrel (125) in such a way that the measuring mandrel can be introduced into the drilled hole to be measured without dipping through the reference element. The reference device (200) is moved, in order to carry out a calibration operation, out of the neutral location into a calibrating location, in which the reference element is arranged in a calibration position coaxially with respect to the measuring mandrel axis (125). The measuring mandrel (120) is then moved by means of the linear drive into a calibrating location, in which a measuring sensor of the measuring mandrel is arranged in the region of the reference element (230-1, 230-2). In the calibrating location, a calibration measurement for calibrating the measuring mandrel (120) is carried out.

A method is provided for non-intrusively determining cross-sectional variation of a fluidic channel. The method includes obtaining, from one or more sensors, a measured pressure profile based on at least one pressure pulse induced in a fluidic channel. A forward model of cross-sectional variation of the fluidic channel is generated. Using the forward model, a simulated pressure profile is generated. Using the measured pressure profile and the simulated pressure profile, an error is determined. When the error is outside a predetermined threshold, the forward model is updated based on the error.

A method is provided for non-intrusively determining cross-sectional variation of a fluidic channel. The method includes obtaining, from one or more sensors, a measured pressure profile based on at least one pressure pulse induced in a fluidic channel. A forward model of cross-sectional variation of the fluidic channel is generated. Using the forward model, a simulated pressure profile is generated. Using the measured pressure profile and the simulated pressure profile, an error is determined. When the error is outside a predetermined threshold, the forward model is updated based on the error.

A processing system employs a processing tool to process workpieces, for example cold working holes and/or installing expandable members into holes. Sensors sense various aspects of the processing. Information regarding performance of the process and/or materials may be stored, for example a hole-by-hole or a workpiece-by-workpiece basis, allowing validation of processing. Information also allows dynamic operation of the processing tool. Analysis of response relationships (e.g., pressure or force versus position or distance) may provide insights into the process and materials, and/or facilitate the real-time feedback including control, alerts, ordering replacement for consumable components.

A processing system employs a processing tool to process workpieces, for example cold working holes and/or installing expandable members into holes. Sensors sense various aspects of the processing. Information regarding performance of the process and/or materials may be stored, for example a hole-by-hole or a workpiece-by-workpiece basis, allowing validation of processing. Information also allows dynamic operation of the processing tool. Analysis of response relationships (e.g., pressure or force versus position or distance) may provide insights into the process and materials, and/or facilitate the real-time feedback including control, alerts, ordering replacement for consumable components.

In the case of a method for measuring the geometry of a drilled hole in a workpiece, a measuring system is used which has a measuring unit with a measuring mandrel that can be moved bidirectionally along a travel path parallel to a measuring mandrel axis. The measuring mandrel is calibrated at least once with the use of a reference device by way of at least one reference element. During a measuring operation, the reference device is arranged in a neutral location outside the travel path of the measuring mandrel in such a way that the measuring mandrel can be introduced into the drilled hole without dipping through the reference element. To carry out a calibration operation, the reference device is moved out of the neutral location. The measuring mandrel is moved into a calibrating location, where a measurement for calibrating the measuring mandrel is carried out.

A processing system employs a processing tool to process workpieces, for example cold working holes and/or installing expandable members into holes. Sensors sense various aspects of the processing. Information regarding performance of the process and/or materials may be stored, for example a hole-by-hole or a workpiece-by-workpiece basis, allowing validation of processing. Information also allows dynamic operation of the processing tool. Analysis of response relationships (e.g., pressure or force versus position or distance) may provide insights into the process and materials, and/or facilitate the real-time feedback including control, alerts, ordering replacement for consumable components.