17results about "Volume flow proportion measurement" patented technology

The invention relates to a cover element for a flow measuring device, comprising a positive-locking receptacle for the bypass channel and pin-shaped flow resistance elements for throttling the fluid flow and fixing the cover element. The invention further relates to a flow measuring device comprising a main channel, a bypass channel, a measuring element, and such a cover element, thereby achieving a cost-effective and simple implementation of the bypass channel.

A mounting tool configured to mount a measuring device inserted into a pipe, such as a flowmeter, includes: a receiving device configured to receive a sensor neck of the measuring device; a pointer device configured to indicate an alignment of the mounting tool fastened to the receiving device; and a fastening device, wherein the receiving device includes a body with two end faces that run parallel to one another, and an edge surface connecting the end faces, wherein on at least one of the end faces the body has a first marking configured to be brought into alignment with a second marking of the sensor neck, wherein the pointer device has a laser by which an alignment of the mounting tool can be adjusted.

A monitoring device for monitoring a flow of a fluid like a breathing gas comprises a main flow path (10) for the fluid between an inlet (11) and an outlet (12). A flow sensor (15) is associated with the main flow path. A flow restrictor (14) is arranged in the main flow path. A secondary flow path (20) for the fluid branches off from the main flow path upstream of the flow restrictor and merges with the main flow path downstream of the flow restrictor. The secondary flow path has higher flow resistance than the main flow path. At least one fluid property sensor (24; 25) for determining at least one property of the fluid in the secondary flow path (20) is associated with the secondary flow path (20). Also disclosed is a ventilation system that comprises the monitoring device and a patient interface (30).

The present application belongs to the technical field of flow meter, disclose a kind of two-phase flow meter and detection method for detecting gas phase, liquid phase simultaneously, two-phase flow meter includes main pipeline, detection mechanism, confluence mechanism, detection mechanism includes gas flow meter, liquid flow meter, first separation component and second separation component;Main pipeline is connected with the import of first separation component, second separation component is connected on one end of first separation component, gas flow meter is connected on the other end pipeline of first separation component, one end of second separation component is connected with liquid flow meter pipeline, the other end of second separation component is connected with gas flow meter pipeline, confluence mechanism is connected with the one end of gas flow meter away from first separation component and the one end of liquid flow meter away from second separation component.The present application improves the flow detection precision of gas-liquid mixed fluid, and then improves the quality of gas-liquid mixed fluid for production.

The electronic control device of the present application is provided with: a flow rate calculation section that calculates the flow rate of intake air from an output signal of a flow rate measuring device attached to an intake pipe; a flow rate correction value calculation section that calculates an average value, a maximum value, a minimum value, and an amplitude of a signal of one or more frequencies included in the output signal of the flow rate measuring device and above a fundamental frequency of the output signal of the flow rate measuring device, for a prescribed period, of the flow rate of intake air calculated by the flow rate calculation section, and calculates a correction value for the flow rate of intake air from the calculation results; and a flow rate correction section that corrects the flow rate of intake air according to the correction value.

The present invention relates to a thermal flow sensor (1) for a flow meter. The thermal flow sensor (1) comprises a main channel portion (3b), a sensor tube (4), and a thermally conductive frame element (13). The main channel portion (3b) comprises a main channel (3) for a medium whose flow rate is to be determined. The sensor tube (4) comprises a first tube portion (5) with an inlet (6) fluidly connected to the main channel (3), a second tube portion (8) with an outlet (9) fluidly connected to the main channel (3) on the opposite side of the inlet (6), a sensing portion (11) connected to the first tube portion (5) and the second tube portion (8) so that the fluid flows from the inlet (6) to the outlet (9) through the sensor tube (4), and at least two sensing heating elements (12) for measuring a temperature or power difference within the sensor tube (4) to determine the flow rate. A thermally conductive frame element (13) contacts the first tube portion (5), the second tube portion (8) and the main channel portion (3b) to equalize the temperature gradient across the first tube portion (5), the second tube portion (8) and the main channel portion (3b). The thermally conductive frame element 13 is a printed circuit board (PCB) 14.

The subject matter of this specification can be embodied in, among other things, a fluid flow measurement apparatus includes an inlet configured to flow a dynamic fluid flow, an outlet configured to flow the dynamic fluid flow, a first fluid conduit fluidically connected between the inlet and the outlet, configured with a first predetermined geometry, and configured to flow a first portion of the dynamic fluid flow, a second fluid conduit fluidically connected between the inlet and the outlet, configured with a second predetermined geometry, and configured to flow a second portion of the dynamic fluid flow, and a first flow meter configured to measure the second portion of the dynamic fluid flow.

The present invention addresses the problem of providing an electrical circuit device enabling a reduction in thermal stress acting on an interface between a conductor piece and a sealing material, and suppression of peeling of the sealing material from a housing. This invention is characterized in that a physical quantity measurement device 20 constituting an electrical circuit device is provided with a housing 201 having a circuit chamber 235 that opens on a front surface 221, three or more conductor pieces 301 that are insert-molded in the housing 201 and have distal end parts 312a lined up and exposed in the circuit chamber, a circuit board 207 accommodated in the circuit chamber, wires 303 connecting between the three or more conductor pieces and the circuit board, and a sealing material 211 that fills the circuit chamber, the three or more conductor pieces being configured such that distal end parts 312a, 313a, which are located in the middle, have a smaller cross-sectional area than that of distal end parts 311a, 314a that are located at the two ends of the alignment direction.

An apparatus for controlling a flow rate of a gas is disclosed herein, including a flow restriction element configured to restrict a flow rate of a gas; a pressure regulator coupled to an inlet of the flow restriction element, wherein the pressure regulator is configured to control a pressure of the gas between the pressure regulator and the flow restriction element; a flow meter coupled to an outlet of the flow restriction element, wherein the flow meter is configured to measure the flow rate of the gas at the outlet of the flow restriction element; and a controller operatively coupled to the pressure regulator and the flow meter, wherein the controller receives the flow rate measurement of the flow meter, determines a pressure setting associated with a target flow rate, and causes the pressure regulator to have the pressure setting.

A sensor mounting module 110 comprises a sensor receiving portion 132 configured to receive an exhaust gas sensor 120 having a sensor body 152, one or more sensor inlets 122a,122b,122c and one or more

This invention provides a physical quantity detection device that improves the accuracy of physical quantity measurement compared to conventional methods. The physical quantity detection device (20) of this invention includes a detection element comprising a flow detection unit (205), a circuit board (207), a housing (201), and a cover (202). The detection element detects physical quantities. The circuit board (207) is equipped with the detection element. The housing (201) houses the circuit board (207). The cover (202) is fixed to the housing (201) and defines a secondary passage (234) for the flow detection unit (205). The housing (201) and the cover (202) have positioning portions (P). The positioning portion (P) has a pin (P1) extending along the thickness direction (Dt) of the circuit board (207) and a fitting portion (P2) for fitting the top end (P11) of the pin (P1) to position the housing (201) and the cover (202). The pin (P1) has a locking portion (P12) which is opposite to the locking surface (207f) of the circuit board (207) along the thickness direction (Dt), thereby restricting the movement of the circuit board (207) along the surface direction (Df) of the surface and back surface.

The invention relates to a flow meter (DMV) for fluid systems, comprising a main channel (1) and a bypass channel (5) connected to the main channel (1) via branch lines (3). A pin-shaped flow resistance element (4) with a non-circular cross-section for flow control and a flow control device (8, 11) for generating a homogeneous, unidirectional flow at the measuring element (6) are arranged in the bypass channel (5). This combination enables precise and reliable flow measurement, which is particularly suitable for small device designs.

A system (400), method and computer program product are disclosed for indirect measurement of the volumetric flow (453) generated by a compressor (110) in an environment with a known intake pressure. The compressor is connected with a measuring volume extending up to a closed check valve in the downstream of the compressor. The check valve is adapted for separating the compressor from a piping system supplying consumers. A pressure sensor is located between the compressor and the check valve. An activation module (410) sends activation instructions (I1) to the pressure sensor for capturing a time series of pressure values (p*) and corresponding time stamps (t*) at a sampling rate which is set to capture three to one hundred pressure values during the time needed by the compressor to pump up the measuring volume to an operational working pressure where the check valve opens. Upon activation of the compressor, the system stores the captured pressure values with their time stamps in a memory (420). A regression module (430) computes the slope (433) of a linear regression line for the pressure values captured during a regression time window between the activation timepoint of the compressor and the time point when the compressor reaches the operational working pressure. The volumetric flow (453) generated by the compressor is computed by multiplying the slope (433) with a proportionality factor defined as the ratio of the measuring volume to the intake pressure.

We provide a system for measuring the flow rate of fluids, including liquids. [Solution] The present invention relates to a system (11) for measuring the flow rate of a liquid-containing fluid, comprising a body (1100) through which a fluid flows, at least one rotor (1101) configured to be rotated by the fluid, and a device (111) for measuring the rotational speed of the rotor (1101). The measuring device (111) comprises an optical module (1111) configured to transmit incident light to the vanes (1101b) of the rotor (1101) in a direction substantially perpendicular to the rotation axis (A) of the rotor (1101), and to receive reflected light from the vanes (1101b). The measuring device (111) further comprises a conversion module (1113) configured to determine the rotational speed of the rotor (1101) and the flow rate of the fluid in accordance with the reflected light emission.

A light detection and ranging (LIDAR) device including a LIDAR housing defining an interior space and configured to attach to a vehicle, a rotating platform situated inside the LIDAR housing, one or more gases enclosed within the LIDAR housing, the one or more gases having a thermal conductivity greater than air, a first valve coupled to the LIDAR housing and configured to introduce the one or more gases into the interior space, and a second valve coupled to the LIDAR housing and configured to discharge a fluid from the interior space to facilitate replacement of air with the one or more gases.

A flow measurement apparatus can include a main flow passage, a variable flow restrictor, a bypass flow passage having an inlet connected with the main flow passage upstream of the variable flow restrictor and an outlet connected with the main flow passage downstream of the variable flow restrictor, and a mass flowmeter connected in the bypass flow passage between the inlet and the outlet. A method can include connecting a flow measurement apparatus, so that a fluid flow in a well also flows through the flow measurement apparatus, and varying a restriction to the fluid flow through the variable flow restrictor in response to a change in a flow rate of the fluid flow.