41results about "Volume variation compensation/correction apparatus" patented technology

A fluid measuring device (10) has two waveguides (22, 24) on a flow channel (12) and a first and a second signal converter element (26, 28) mounted to the waveguides (22, 24). The signal converter elements (26, 28) each comprise at least two signal converters (30, 32, 34, 36, 38, 40) for exciting surface acoustic waves in the waveguides (22, 24) that are arranged beside each other in a transverse direction (T) of the flow channel (12). To determining a flow rate through the flow channel (12) center signal data is measured with the center signal converters (30, 32) and side signal data is measured with the side signal converters (34, 36, 38, 40) of the first and second signal converter element (26, 28). From the measured center and side signal data, a correction coefficient is determined and a flow rate is determined from the measured center and side signal data and the determined correction coefficient.

An air flow rate measurement device includes an air flow rate detection device which detects an air flow rate of an air flow moving in a pipe and generates an input signal corresponding to the air flow rate and a calculation unit which determines whether the air flow is a laminar flow or a turbulent flow based on the input signal and outputs a result of calculation using an output result obtained by performing proportional calculation on the input signal when it is determined that the air flow is a laminar flow or a result of calculation using an output result obtained by performing square calculation on the input signal when it is determined that the air flow is a turbulent flow as an output signal corresponding to the air flow rate.

An ultrasonic transducer comprising: a transducer chamber (WK) with an end-face coupling element (KE) made of a first material (M1); a piezoelectric element (PE) made of a second material (M2) for generating ultrasonic waves, having a surface (O) having a normal vector (NO) and an area (FO); wherein the coupling element (KE) has connecting elements (VE) on one side (SW), the connecting elements (VE) each having a contact surface (KF), being elastically deformable in a plane perpendicular to the normal vector (NO), and being materially bonded to the piezoelectric element (PE) by means of the contact surface (KF); wherein the sum of the areas (S) of the contact surfaces (KF) is between 30% and 9% of a surface of the piezoelectric element (PE); wherein the connecting elements (VE) have a characteristic height (CH) and a characteristic radius (CR);where the ratio of the characteristic height (CH) to the characteristic radius (CR) is not less than 1; where the ratio of the characteristic height (CH) to the characteristic radius (CR) is not more than 4.

Accurately manage the actual transmission speed and transmission volume. [Solution] A method for managing the discharge of a cement composition using a pump truck equipped with a cylinder and piston for dispensing the cement composition, wherein the reciprocating motion of the piston in the cylinder is detected by a sensor, and the discharge speed or discharge amount of the cement composition actually discharged from the pump truck is determined based on the detection result of the sensor, the capacity of the cylinder, and a correction value corresponding to the slump of the cement composition.

The invention relates to the field of flow rate measurement of liquids by means of a magnetic-inductive flowmeter. The aim of the present invention is to provide a method which corrects the erroneous flow rate measurement. The aim is achieved by a method for compensating for at least one disturbance variable caused by a magnetic field in a flow rate measurement of liquids by means of a magnetic-inductive flowmeter (1), which supplies an erroneous flow rate (22) on the basis of the disturbance variable. An actual flow rate (23) is determined with the aid of the erroneous flow rate (22) and also a data-based model (20) of the disturbance variable. Characteristic influencing parameters of the disturbance variable are used as input parameters (21) for the data-based model (20). The aim is also achieved by an evaluation device (25) for carrying out the method. The invention further comprises an electric arc furnace (30) having a cooling system (27) which has an inflow (28) and an outflow (29) and in each case comprises a magnetic-inductive flowmeter (1). Each of the flowmeters (1) has an evaluation device (25).

The application discloses a kind of high-precision measurement methods of electromagnetic water meter using intelligent sensor, it is related to fluid metering cross technical field, including, based on the electrode original signal generated by excitation magnetic field, obtain the uniformity index of partition compensation excitation magnetic field, and dynamically configure the gate voltage of ion channel, generate the voltage signal after purification;Joint correlation prediction model is constructed, and the voltage signal after purification and mechanical vibration data are fused and analyzed, to obtain initial water flow estimate value;Through dynamic temperature compensation and zero point online calibration, error correction is carried out to initial water flow estimate value, to generate high confidence water flow value.The application calculates the magnetic field uniformity index of each sector region in real time by space-time differential-spectrum joint analysis method, and dynamically adjusts the gate voltage of ion channel according to the magnetic field uniformity index, to realize adaptive suppression to harmonic interference and timing error in electrode signal, to improve signal purity and measurement stability.

The disclosure describes techniques for a fluid meter or other device to compensate for errors in ultrasonic flowrate measurement. In an example, a fluid meter measures a fluid (typically water) having an additive or impurity, such as glycol, or salt, respectively. When metering such a fluid, ultrasonic fluid metering devices may produce slightly inaccurate results. Accordingly, an adjustment factor, based on the fluid, the additive or impurity, and the temperature, would be desirable. In an example, the fluid (e.g., water and an additive or an impurity) and the temperature of the fluid are determined. The speed of sound through the fluid is measured, and mapped to a concentration (e.g., a percentage of the additive or impurity). The concentration is mapped to a viscosity, and the viscosity is mapped to the adjustment factor. The adjustment factor is used to adjust (or correct) a flowrate measured by an ultrasonic metrology device.

The disclosure describes techniques for a fluid meter or other device to compensate for errors in ultrasonic flowrate measurement. In an example, a fluid meter measures a fluid (typically water) having an additive or impurity, such as glycol, or salt, respectively. When metering such a fluid, ultrasonic fluid metering devices may produce slightly inaccurate results. Accordingly, an adjustment factor, based on the fluid, the additive or impurity, and the temperature, would be desirable. In an example, the fluid (e.g., water and an additive or an impurity) and the temperature of the fluid are determined. The speed of sound through the fluid is measured, and mapped to a concentration (e.g., a percentage of the additive or impurity). The concentration is mapped to a viscosity, and the viscosity is mapped to the adjustment factor. The adjustment factor is used to adjust (or correct) a flowrate measured by an ultrasonic metrology device.

This application relates to the field of water meter metering technology, and more particularly to a sloped sealed metering chamber, mainly comprising an upper metering chamber and a lower metering chamber. The upper metering chamber has an outlet at its top, and the lower metering chamber has an inlet at its bottom. The lower end face of the upper metering chamber and the upper end face of the lower metering chamber are mutually adapted inclined slopes. When they are fitted together, the interior of the upper and lower metering chambers forms a piston rotation cavity, and the outer periphery of the upper and lower metering chambers forms an annular sealing groove. This invention, by employing inclined surface geometry and utilizing the "wedge effect" of the slope, converts externally applied axial pressure into radial clamping force, giving the sealing structure better self-compensation capability. When the cavity undergoes micro-deformation due to temperature fluctuations or water pressure impacts, or when the sealing surface wears due to long-term use, the inclined surface structure will automatically adjust its position under pressure.

The application discloses a device for measuring liquid metal flow, which comprises a Venturi tube, a first pressure tapping pipe, a first pressure guide pipe, a second pressure tapping pipe, a second pressure guide pipe and a differential pressure transmitter. The first pressure tapping pipe is connected to the inlet section of the Venturi tube at one end. The first pressure guide pipe is connected to one port of the differential pressure transmitter at one end. The first pressure tapping pipe and the first pressure guide pipe are connected through a first flange and a second flange. The second pressure tapping pipe is connected to the throat of the Venturi tube at one end. The second pressure guide pipe is connected to the other port of the differential pressure transmitter at one end. The first pressure guide pipe and the second pressure guide pipe are filled with pressure guide oil. The second pressure tapping pipe and the second pressure guide pipe are connected through a third flange and a fourth flange. Isolation membranes are arranged between the first flange and the second flange and between the third flange and the fourth flange. The differential pressure transmitter measures the pressure difference between the two ports, so that the liquid metal flow through the device is obtained through the pressure difference.

To simplify a drive algorithm or a circuit of a vibration-type meter.SOLUTION: There is provided a meter electronic apparatus 20 having a notch filter 26 configured to perform filter processing for a sensor signal from a sensor assembly 10 of a vibration-type meter. The meter electronic apparatus 20 includes the notch filter 26 communicatively connected to the sensor assembly 10. The meter electronic apparatus 20 is configured to receive, from the sensor assembly 10, a sensor signal composed of a first component in a resonant frequency of the sensor assembly 10 and a second component in a non-resonant frequency, and in the notch filter, to pass the first component with substantially zero phase shift and to substantially attenuate the second component.SELECTED DRAWING: Figure 2

The application relates to a high-temperature external-pasting ultrasonic probe arrangement method for an ultrasonic flowmeter for measuring the flow of liquid in a pipeline, and belongs to the acoustic and sensor technical fields. The technical scheme is that three external-pasting probes are arranged on one bus on one side of a measuring pipeline (2), the spacing between the three external-pasting probes (1) is different to adapt to the influence of high temperature on ultrasonic signal transmission, and correspondingly, three external-pasting probes are also arranged on the symmetric position of one bus on the other side of the measuring pipeline (2) to receive and emit ultrasonic signals. The external-pasting probes contain two installation modes of Z mode and V mode, the probes installed in the Z mode can normally work in normal temperature and high temperature environments, the probes installed in the V mode can only normally work in the high temperature environment, and the arrangement method can increase the number of measuring sound paths in the high temperature environment and improve the measuring precision in the high temperature environment.

The application discloses a high-precision ultrasonic water meter for half-pipe metering and belongs to the technical field of ultrasonic water meters. The high-precision ultrasonic water meter for half-pipe metering comprises an upper shell assembly, a lower shell assembly, a metering assembly and an electric control assembly. The upper shell assembly comprises an upper shell body, a transparent window is glued and fixed to the top surface of the upper shell body, the lower shell assembly comprises a lower shell body, the upper shell body and the lower shell body are fixed through self-tapping, a pipe groove is arranged between the upper shell body and the lower shell body, the metering assembly comprises a metering pipe section, the metering pipe section is fixed to the inner side of the pipe groove, the metering pipe section is provided with a threaded structure at both ends and protrudes outside the pipe groove, and a pair of horizontally offset side-mounted transducers are installed on the metering pipe section. The high-precision ultrasonic water meter for half-pipe metering can realize high-precision metering of half pipes and working conditions lower than half pipes, and simultaneously considers the structural reliability, assembly convenience and long-term use stability through optimization of the installation mode of the transducers and design of the main control board algorithm.

This invention discloses a crop seed flow monitoring device, comprising a connecting housing, a seed inlet connector connected to the upper end of the connecting housing, a monitoring capacitor plate, a middle capacitor plate, and an environmental compensation capacitor plate connected sequentially and at intervals to the seed inlet connector extending into the connecting housing, a seed outlet connector connected to the lower end of the connecting housing, an upper end of a seed dropping channel covering the bottom of the seed inlet, and a lower end of the seed dropping channel covering the top of the seed outlet, and a signal conditioning circuit board fixedly connected inside the connecting housing, the signal conditioning circuit board having a signal conditioning circuit, and a controller fixedly connected to the outside of the connecting housing, the monitoring capacitor plate, the middle capacitor plate, and the environmental compensation capacitor plate being electrically connected to the signal conditioning circuit board, and the signal conditioning circuit board and the controller being electrically connected. Using this invention can reduce the impact of environmental temperature and humidity changes on the basic capacitance, thereby improving the accuracy of seed flow monitoring.

The present disclosure is directed to a method for determining a fluid pressure (p) at a fluid flow meter (5) being installed in a pipe network (1) that is supplied with fluid at a varying and / or variable input pressure (pin), wherein the method comprises the following steps: - recording input pressure information, wherein the input pressure information allows to determine a difference (Δp) between the input pressure (pin) in at least one first considered time-window and the input pressure (pin) in at least one second considered time-window; - aggregating, in the fluid flow meter (5), at least during the at least one first considered time-window and during the at least one second considered time-window, statistical data of a plurality of fluid flow events and / or fluid volume consumption events; - providing the aggregated statistical data in regular intervals and / or on demand to a head-end system (HES) that has access to the input pressure information; and - determining, by the head-end system (HES), a fluid pressure (p) at the fluid flow meter (5) based on - a change in the aggregated statistical data between the at least one first considered time-window and the at least one second considered time-window, and - the difference (Δp) between the input pressure (pin) in the at least one first considered time-window and the input pressure (pin) in the at least one second considered time-window.

The application discloses a wheat seed flow real-time monitoring method with environment compensation, equipment and medium, relates to the technical field of agricultural operation monitoring, and comprises the following steps: seeds discharged from a seed meter pass through a monitoring channel between an intermediate capacitor plate and a monitoring capacitor plate and fall, and monitoring capacitor signals and environment compensation capacitor signals are collected; the monitoring capacitor value after offset of a basic capacitor is compensated for the environment, a sliding average filtering algorithm is used to process the environment compensation capacitor value after offset, the monitoring capacitor signals are differentiated from the filtered environment compensation capacitor value; a capacitor flow ratio is calculated according to the sliding average capacitor value; the real-time seed flow at the moment is obtained according to the real-time capacitor flow ratio and the real-time capacitor value; and the seed flow in 1 second is calculated by integration to obtain the real-time seed flow. The application can realize reliable real-time monitoring of different seed flows.

The application discloses a kind of based on BP neural network's ultrasonic flowmeter correction device, method and system, method includes: by standard flowmeter and ultrasonic flowmeter simultaneously detect instantaneous flow, simultaneously measure influence factor variable value;The measured data is normalized, and neuron is initialized;Based on the feedback learning mechanism of BP neural network, according to instantaneous flow actual value, instantaneous flow measured value and influence factor variable value are autonomously learned training;When reaching preset error rate or meeting preset learning number, training is completed, and model parameters are saved;Model parameters are loaded to ultrasonic flowmeter, and the correction of ultrasonic flowmeter is completed.Through the technical scheme of the application, the nonlinear, irregular measurement error caused by the change of the coupling of multiple factors can be corrected, which is suitable for complex working conditions, and the correction calibration process does not require manual intervention, fully automatic fitting, greatly improves production efficiency and saves cost.

The present application relates to the technical field of deep-sea mining, and discloses a wide-temperature-range multi-metal nodule conveying flow measurement method. Coil temperature, ore temperature, sensor voltage data and ore flow detection data are collected based on triple circulation for metal nodule flow detection, a characteristic variable and a correction model are constructed based on the Bloch law, a training set and a verification set are obtained according to the characteristic variable, the correction model and the detection data, and the correction model is trained based on the training set and the verification set. Coil temperature and ore temperature of a detection coil in an actual mining process and voltage data of a sensor are obtained and input into the correction model, corresponding ore flow is obtained, and measurement of multi-metal nodule conveying flow is completed. The problem that existing deep-sea mining cannot accurately measure multi-metal nodule ore flow in a wide temperature change range is solved.

This invention discloses an error compensation method and system for electromagnetic water meters that combines conductivity and temperature. The method includes: analyzing the changing trend of actual flow velocity using prediction results to construct trend vector 1; analyzing the changing trend of differential flow velocity by subtracting the predicted value from the measured value to construct trend vector 2; performing feature analysis and feature compensation on the current evolution process based on transfer learning from historical data; combining the feature-compensated compensation vector with trend vector 1 to obtain compensated trend vector 1; and using the compensated trend vector 1 to correct the curve of the prediction result to obtain the electromagnetic water meter error compensation result. The compensated flow velocity data more closely matches the actual physical state, exhibiting stronger robustness and generalization ability, and effectively meeting the needs of smart water management and industrial metering for high-precision, full-time-domain monitoring.

A method of controlling a hot wire anemometer (HWA) of a non-nicotine e-vaping device includes controlling, by a first PID controller, a level of power applied by the non-nicotine e-vaping device to the HWA based on a temperature of a heated element of the HWA and a temperature setpoint; generating a puff detection signal indicating whether or not a puff is currently occurring with respect to the non-nicotine e-vaping device; and while the puff detection signal indicates that a puff is not currently occurring with respect to the non-nicotine e-vaping device, detecting, by a second PID controller, a change in an ambient temperature of the HWA, and controlling, by the second PID controller, the temperature setpoint such that the temperature setpoint changes in response to the detected change in the ambient temperature of the HWA.

The present invention relates to devices for controlling fluid flow. A device, system, and method for regulating fluid flow are disclosed. The device includes a curved, elongated support member that is elastically deformable and has a first end and a second end. The device also includes an opposing support member configured to position a tube against the curved, elongated support member between the first end and the second end. Deformation of the curved, elongated support member caused by movement of the first end and the second end toward one another reduces an internal volume of the tube.

The application provides a flow measurement system and a measurement method for a compact reactor coolant system. The flow measurement system is connected with an inlet chamber and an outlet chamber of a steam generator through a bypass pipe, and is matched with a first detection assembly and a second detection assembly for detecting the pressure and temperature of the chamber, a flow meter on the bypass pipe and a processing unit. The flow measurement system realizes accurate measurement of the coolant system flow by relying on the pressure, temperature and bypass flow multi-parameter acquisition and comprehensive calculation of the parallel flow channel.

The present application relates to the technical field of automatic calibration, in particular to a flow measurement automatic calibration system based on wireless remote transmission diaphragm gas meter. It comprises: a configuration and use unit which initializes the settings of the gas meter and performs configuration and use; a battery state monitoring unit which monitors the battery power in real time, gives a warning on the liquid crystal screen when the power is insufficient, and automatically closes the valve to cut off the gas supply when the power is used up; a user interface and control unit which provides relevant information to the user through the liquid crystal display and accepts the user's input instructions to perform corresponding control operations; a flow measurement and automatic calibration unit which monitors the gas flow through the gas meter and uses the normalized least mean square algorithm to periodically check and adjust the measurement accuracy. The present application designs to introduce the normalized least mean square algorithm for periodic flow measurement automatic calibration, which can dynamically adjust its internal parameters to compensate for the deviation caused by environmental changes and hardware aging, ensuring the high accuracy of gas flow measurement over a long period of time.