In order to accurately calculate an estimated flow rate by a dynamic constant volume method, a flow rate calculation system including a tank into which fluid flows, an inflow line through which the fluid flows into the tank, and a pressure sensor that detects the pressure inside the tank is adapted to include: a pressure change data storage part that stores pressure change data indicating a temporal change in the pressure detected by the pressure sensor during an inflow period; a flow rate calculation part that calculates the estimated flow rate during the inflow period based on a pressure change rate; and a flow rate correction part that, on the basis of first pressure detected by the pressure sensor after a predetermined time has elapsed after the inflow period and second pressure included in the pressure change data and higher than the first pressure, corrects the estimated flow rate.

A method for measuring flow rate based on dynamic optimization of three pressure sensors is provided. In the method, pressure sensors are set on the fix positions of both ends of the test straight pipe and on the middle position of the test straight pipe, and are configured to measure the pressure of the fluid at the positions where the pressure sensors are set in real time, and the real-time dynamic flow rate of the fluid in the pipe can be estimated through a flow rate calculation estimator. The method has fast response speed and high measurement accuracy, can effectively eliminate the noise interference of vibration in the environment, and has strong anti-interference ability.

A method for measuring flow rate based on dynamic optimization of three pressure sensors is provided. In the method, pressure sensors are set on the fix positions of both ends of the test straight pipe and on the middle position of the test straight pipe, and are configured to measure the pressure of the fluid at the positions where the pressure sensors are set in real time, and the real-time dynamic flow rate of the fluid in the pipe can be estimated through a flow rate calculation estimator. The method has fast response speed and high measurement accuracy, can effectively eliminate the noise interference of vibration in the environment, and has strong anti-interference ability.

A system for controlling a flow rate of a fluid through a valve is provided. The system includes a valve and an actuator. An actuator drive device is driven by an actuator motor and is coupled to the valve for driving the valve between multiple positions. The system further includes a differential pressure sensor configured to measure a differential pressure across the valve and a controller that is communicably coupled with the differential pressure sensor and the motor. The controller is configured to receive a flow rate setpoint and the differential pressure measurement, determine an estimated flow rate based on the differential pressure measurement, determine an actuator position setpoint using the flow rate setpoint and the estimated flow rate, and operate the motor to drive the drive device to the actuator position setpoint.

A system for determining coolant flow rate in a nuclear reactor primary cooling loop includes a processor and a memory. The memory stores physical measurements of the mechanical components comprising the primary cooling loop. The memory also stores instructions that cause the processor to: receive pressure data from a plurality of pressure sensors in the cooling loop; calculate a model of fluid flow through the primary cooling loop based on the mechanical component measurements; compare the data from the pressure sensors with estimated data from the fluid flow model; and calculate a statistical weighting of the pressure data from the pressure sensors based on the estimated pressure data from the fluid flow model. In another system, the flow rate is determined from a combination of the estimate from the modeled fluid flow with an estimate based on a calorimetric thermal exchange calculation.

A system for determining coolant flow rate in a nuclear reactor primary cooling loop includes a processor and a memory. The memory stores physical measurements of the mechanical components comprising the primary cooling loop. The memory also stores instructions that cause the processor to: receive pressure data from a plurality of pressure sensors in the cooling loop; calculate a model of fluid flow through the primary cooling loop based on the mechanical component measurements; compare the data from the pressure sensors with estimated data from the fluid flow model; and calculate a statistical weighting of the pressure data from the pressure sensors based on the estimated pressure data from the fluid flow model. In another system, the flow rate is determined from a combination of the estimate from the modeled fluid flow with an estimate based on a calorimetric thermal exchange calculation.

A measuring system for measuring a mass flow rate, a density, a temperature or a flow velocity. The measuring system includes a main line, a first Coriolis measuring device arranged in the main line, a second Coriolis measuring device arranged in series with the first Coriolis measuring device in the main line, a bypass line which bypasses the second Coriolis measuring device, a first valve arranged in the bypass line, and a computing unit which is connected to the first Coriolis measuring device and to the second Coriolis measuring device. The first valve opens depending on a pressure. The first Coriolis measuring device is designed for a higher maximum flow rate than the second Coriolis measuring device.

A measuring system for measuring a mass flow rate, a density, a temperature or a flow velocity. The measuring system includes a main line, a first Coriolis measuring device arranged in the main line, a second Coriolis measuring device arranged in series with the first Coriolis measuring device in the main line, a bypass line which bypasses the second Coriolis measuring device, a first valve arranged in the bypass line, and a computing unit which is connected to the first Coriolis measuring device and to the second Coriolis measuring device. The first valve opens depending on a pressure. The first Coriolis measuring device is designed for a higher maximum flow rate than the second Coriolis measuring device.

A system for removing dead volume in a sensor assembly of a mass flow controller is presented. The system comprises a valve assembly communicable coupled to the sensor assembly. The valve assembly is in fluid communication with fluid in a primary flow path and the sensor assembly is in fluid communication with fluid in the primary flow path. The sensor assembly comprises a pressure transducer having a first reservoir and another pressure transducer having a second reservoir. The first reservoir has a port in fluid communication with fluid in a sampled flow path. The second reservoir is coupled to a second pressure transducer and is fluidly coupled to the first reservoir through a flow through path. The second reservoir also includes another port for communicating the flow of fluid from the flow through path to another flow path. A flow rate restrictor is disposed in the flow through path.

A method, system and apparatus for delivery of custom blended dispensing custom blended personal care beauty products for a beauty service, wherein one or more components of a beauty product are stored where they may be supplied as needed to a dispenser, and where a control mechanism regulates the dosage of beauty components to provide a desired selected personal care beauty product with the characteristics selected. A selection screen display provides an image of a person and the person's hair that may be manipulated to simulate modifications that may include cut or styling and color or other effects. The selections are processed and stored and a formula is generated and communicating to a dispensing device to deliver the product components to produce the formula.