61 results about "Flow probe" patented technology

An enhanced flow ophthalmic surgical probe for ophthalmic microsurgery, such as vitrectomy, in an eye of a patient is disclosed. The enhanced flow probe includes a body, a needle, a cutter, and an optional stiffening sleeve. The needle, the cutter, and the optional stiffening sleeve each possess a widened diameter at its proximal portion relative to the diameter at its distal portion, thereby providing an enhanced ophthalmic surgical probe that allows adequate stiffness, reduced flow resistance, and an increased flow rate while maintaining a less invasive, large gauge diameter needle and cutter.

A fluid flow probe including: first, second and third pressure sensors; a first port for communicating a first pressure to the first pressure sensor; a second port for communicating a second pressure to the second pressure sensor, the second port being substantially oppositely disposed with respect to the first port, a third pressure port suitable for communicating a static pressure to the third pressure sensor; first and second outputs electrically coupled to the first and second pressure sensors, respectively, one of the first and second outputs indicative of a total pressure and the other of the outputs indicative of a base pressure; and, a third output electrically coupled to the third pressure sensor and indicative of the static pressure.

The invention discloses a high-sensitivity nondestructive detection method used for detecting an array-typed flexible eddy probe, and a probe device thereof. A back pad that the normal array-typed flexible eddy probe is corresponding to the detection surface is made of material such as ferrite; furthermore, the eddy detection on the component is carried out by a normal eddy detection method; the back pad completely covers all small coils in the normal array-typed flexible eddy probe; when in detection, individual inductance of each coil unit is increased. By improving the individual inductance of each coil unit, the sensitiveness of the probe is improved, thus leading the array-typed flexible eddy probe to realize the nondestructive detection on the detected component with high sensitiveness.

A system and method are provided for loading a sample into an analytical instrument using acoustic droplet ejection (“ADE”) in combination with a continuous flow sampling probe. An acoustic droplet ejector is used to eject small droplets of a fluid sample containing an analyte into the sampling tip of a continuous flow sampling probe, where the acoustically ejected droplet combines with a continuous, circulating flow stream of solvent within the flow probe. Fluid circulation within the probe transports the sample through a sample transport capillary to an outlet that directs the analyte away from the probe to an analytical instrument, e.g., a device that detects the presence, concentration quantity, and / or identity of the analyte. When the analytical instrument is a mass spectrometer or other type of device requiring the analyte to be in ionized form, the exiting droplets pass through an ionization region, e.g., an electrospray ion source, prior to entering the mass spectrometer or other analytical instrument. The method employs active flow control and enables real-time kinetic measurements.

A fluid flow probe including: first, second and third pressure sensors; a first port for communicating a first pressure to the first pressure sensor; a second port for communicating a second pressure to the second pressure sensor, the second port being substantially oppositely disposed with respect to the first port, a third pressure port suitable for communicating a static pressure to the third pressure sensor; first and second outputs electrically coupled to the first and second pressure sensors, respectively, one of the first and second outputs indicative of a total pressure and the other of the outputs indicative of a base pressure; and, a third output electrically coupled to the third pressure sensor and indicative of the static pressure.

The invention provides a whole network flow analysis method of a computer network. Real-time network flow data are collected from a network element management system of a flow monitoring device (flow probe), by adoption of the method, a monitoring function of real-time flow, flow topology, business flow, abnormal flow and other flow is realized, a flow statistic analysis function according to unit, business type, topological structure and other dimensions is realized, and a function of generating an alarm event when the flow exceeds a regulated threshold or when abnormal flow is detected is realized, therefore the flow monitoring of the computer network is accomplished; and the flow of the computer network is limited and controlled by regulating global and local flow control strategies and releasing the global and local flow control strategies to the network element management system of the flow monitoring device for implementation, therefore regular, efficient and orderly operation of the computer network is achieved.

The invention discloses a full-automatic microfiltration membrane aperture distribution tester as well as an automatic measuring method and application thereof. The full-automatic microfiltration membrane aperture distribution tester comprises a gas supply cylinder, a gas buffer tank and a test membrane cell for fixing and sealing a microfiltration membrane, wherein the gas supply cylinder, the gas accumulator tank and the test membrane cell are successively connected via a pipeline. The full-automatic microfiltration membrane aperture distribution tester is characterized in that a motor-driven flow regulating valve is arranged between the gas supply cylinder and the gas buffer tank; the gas buffer tank is provided with a pressure probe; an outlet on the microfiltration membrane penetration side of the test membrane cell is provided with a gas flow probe; the signal output end of the pressure probe and the signal output end of the gas flow probe are connected with a data acquisition module for collecting pressure and flow signals in real time; the signals are transmitted by the communication module and a computer controller; the signal output end of the computer controller is connected with the signal input end of the motor-driven flow regulating valve; and the motor-driven flow regulating valve is under real-time feedback control. According to the full-automatic microfiltration membrane aperture distribution tester, the measuring condition can be automatically controlled in real time, measuring data is collected, data is processed in real time, and the assessment requirement on the performance of various sieve-pore filtration membranes can be satisfied.

The invention provides a network flow tracing system and method based on the OpenFlow technology. The system at least comprises a search module which is used for breadth-first search in network topology, so as to determine the sending position of a flow probe. The system also comprises a probe sending module which is used for sending the flow probe on a corresponding switcher based on the sending position determined by the search module, a probe verification module which is used for data package processing so as to judge whether the flow probe detects a target flow or not, and a scheduling module which is used for the integrated scheduling of the search module, the probe sending module and the probe verification module so as to achieve the task of flow tracing, thereby achieving the quick and high-efficiency flow tracing in an OpenFlow switcher network. The probe sending module and the probe verification module can support OpenFlow protocol in a plurality of versions, so as to achieve the interaction with different switchers.

The invention belongs to the technical field of plasma diagnostic, and concretely discloses a three-dimensional zonal current probe system. The invention comprises a 5 probe group, a first 6 probe group and a second 6 probe group, wherein, the 5 probe group arranged on a magnetic transmission mechanism of a controlled nuclear fusion research device has a two-combination three-step structure; the first 6 probe group arranged on an electric scan gas mechanism of the controlled nuclear fusion research device has a three-step structure; the second 6 probe group arranged on a fast pneumatic reciprocating scan mechanism of the controlled nuclear fusion research device has the three-step structure. The invention has the advantage that the probe group adopting the three-step structure can measure the three-dimensional structure and the distribution of various parameters of marginal plasma in radial direction, poleward direction and circumferential direction at the same time. A graphite probe head and a graphite protective sleeve adopt pyrolytic graphite. Metrical data is exact and reliable, and the service life of the probe group is enhanced. The invention can be used for measuring three-dimensional spatial-temporal distribution of the parameters of the marginal plasma in the controlled nuclear fusion research device.

The invention discloses a double-feedback gas flow sensor which comprises a gas flow probe, a differential amplification circuit, a conditioning circuit, a compensation circuit, a controller and a power amplification circuit. The controller is used for outputting two paths of PWM waves to the power amplification circuit, then the magnitude of feedback currents are adjusted and controlled, the differential amplification circuit is not directly used for current feedback, a corresponding control algorithm is set in the controller to output proper feedback quantity, the shortcomings that analog circuit feedback quantity is too large or too small, multi-time feedback is caused, and response speed is slow are overcome, quick balance of bridge can be well achieved, and the dynamic property of the sensor is greatly improved. Meanwhile, volume flow rate is corrected in real time according to gas pressure in a pipeline, accordingly, an accurate gas volume flow value under an actual working condition is obtained, measuring errors caused by air pressure changing are removed, and the accuracy requirement on a volume flow rate meter of industrial production measuring is met.

An enhanced flow ophthalmic surgical probe for ophthalmic microsurgery, such as vitrectomy, in an eye of a patient is disclosed. The enhanced flow probe includes a body, a needle, a cutter, and an optional stiffening sleeve. The needle, the cutter, and the optional stiffening sleeve each possess a widened diameter at its proximal portion relative to the diameter at its distal portion, thereby providing an enhanced ophthalmic surgical probe that allows adequate stiffness, reduced flow resistance, and an increased flow rate while maintaining a less invasive, large gauge diameter needle and cutter.

Problems of instability and non-linearity in probe-type magnetic flow meters are ameliorated by either or both of a conductor coating connecting a tip portion of the probe with a supporting probe stem and flat end plates parallel to the flow direction that are arranged adjacent to the sensing electrodes and that act to straighten and confine fluid flowing past the electrodes.

A system and method for perfusing an organ with a normothermic extracorporeal perfusion system is disclosed. The perfusion system is an active flow system using a centrifugal pump to aid in circulation. The system includes a dialyzer that removes excess fluid and impurities, while maintaining the pH, which allows the perfusion system to be used for an extended period that may exceed 24 hours. The system includes a parallel circuit, which includes at least one centrifugal pump, a membrane oxygenator comprising a heat exchanger; a dialyzer; a measurement cell for real-time monitoring of oxygen saturation and hematocrit in the liver; more than one flow probe; and an organ chamber.

The invention provides a high-pressure liquid flow measuring device based on a bluff body streaming phenomenon and a control method thereof, so as to solve the technical problems of low industrial control quality and narrow measurement range existing in an existing vortex street flowmeter. The measuring device comprises a vortex street flow probe, a signal processing circuit module, a motor driving circuit module, a limit circuit module, an MCU (Microprogrammed Control Unit) main control circuit module and a communication module, wherein the signal processing circuit module is used for converting a charge signal output by the vortex street flow probe into a square signal; the MCU main control circuit module is used for performing cubic spline interpolation calibration, then converting a square signal into instantaneous flow, calculating the accumulated flow, setting an address number for the communication module so as to communicate with an external upper computer, further comparing the rated flow sent back by the communication module with the instantaneous flow, and finally sending the comparative result to the motor driving circuit module; further, in combination with the input of the limit circuit module, a closed loop feedback method is adopted, and remote detection of the measuring device and automatic regulation on control and flow can be realized.

The invention relates to the technical field of engineering machinery and particularly relates to a cavitation eliminating device. The cavitation eliminating device comprises a pump body. The cavitation eliminating device is characterized in that a cavitation eliminating device is arranged on the pump body and comprises an electric valve, a control device, an air inlet pipe, exploring tubes and a flow probe, wherein an air hole is formed in the pump body, the flow probe is arranged at a water inlet of the pump body, the exploring tubes are inserted into the air hole, air outlets of the exploring tubes are communicated with a cavitation region of the pump body, air inlets of the exploring tubes are communicated with the atmosphere through the air inlet pipe, the electric valve is arranged at the end of the air inlet pipe, and the flow probe and the electric valve are respectively connected with the control device. By utilizing the structure, the working efficiency of a water pump is not influenced, and long-term major damages caused by a cavitation phenomenon to the water pump are thoroughly solved; the cavitation eliminating device has the advantages of simple structure, convenience in operation, low cost, reliability in use and the like.

Method and apparatus relating to ultrasound flow probes Measurement of time of flight of ultrasound pulses comprises: transmitting the pulses across a fluid flow; detecting a waveform (200) of the pulses, generating a cross-correlation between the waveform (200) and a tone (210) and identifying a plurality of peaks (220) in the cross-correlation; fitting a curve template (310) to the waveform at locations (300) corresponding to the peaks (220) and identifying the location (330) of the minimum error; performing a further cross-correlation (420) between the waveform (200) and the tone (210) over only a portion of the waveform (200) containing the minimum error location (330); and determining the temporal location corresponding to the maximum (430) of the further cross-correlation (430).

The invention belongs to the field of flow measurement systems, and in particular relates to an intelligent magnetic vortex flow detection control system. The system comprises a meter-reading terminal (5) provided with a flow measurement gauge, a GSM / GPRS network and a detection control center, wherein a gauge body (1) of the flow measurement gauge is fixedly provided with a vortex generating body (2) in which a magnetic vortex flow probe (3) is fixedly arranged; an electromagnetic flow probe (4) is also arranged in the measurement gauge body (1); output ports of the magnetic vortex flow probe (3) and the electromagnetic flow probe (4) are connected with interfaces of the flow measurement gauge in the meter-reading terminal (5); the meter-reading terminal comprises the flow measurement gauge and a meter-reading terminal GSM / GPRS network modem; ports of the flow measurement gauge are connected with the ports of the meter-reading terminal GSM / GPRS network modem; and the ports of the meter-reading terminal GSM / GPRS network modem are connected to a detection-control-end GSM / GPRS network modem via the GSM / GPRS network.

The present disclosure provides systems that include a flow probe that senses fluid flow or mass flow of fluid delivery to a patient. Based at least in part on the sensed fluid or mass flow, the flow probe provides flow-related data (e.g., volume or mass flow rate) that the system uses to derive a volume of fluid being delivered. The fluid can be delivered from an IV bag, another in-line port, or a combination of the two. The disclosed systems provide fluid volume and / or fluid rate for display to a clinician and an informative understanding of what volume of fluid / mass a patient has received.

An ultrasonic flow probe (100) comprising a mounting member (101) for mounting on a surface of a conduit and thereby defining a mounting axis (B) perpendicular to the surface, a frame (103) mounted on the mounting member (101), and a plurality of ultrasonic transducers (105) mounted on the frame (103) and aligned along a primary axis (A); wherein the frame (103) and mounting member (101) are configurable such that the primary axis (A) is at an angle to the mounting axis (B) so that, in use, ultrasound passing between the transducers (105) travels at an angle to fluid flowing in the conduit.

The invention discloses a measurement method of a digital vortex flowmeter which is anti-vibration and interference. For the vortex flowmeter probes respectively leading out public signal lines, noise pickup signal lines and flow signal lines, the measurement method is to complete the flow signal After sampling and noise signal and spectrum analysis, any peak in the energy spectrum obtained by spectrum analysis is effectively judged, and then the effective peak value of the flow signal and the effective peak value of the noise signal are matched; according to the matching result, the high-frequency component ratio algorithm is selected or the flow Signal saturation judgment, when the flow signal is not saturated, use the energy ratio method, and use the flow signal frequency corresponding to the maximum value of the energy ratio as the vortex frequency; when the flow signal is saturated, use the frequency corresponding to the maximum energy peak value of the flow signal as the frequency. Vortex frequency. The method of the invention is applied to the vortex flowmeter, effectively improving the anti-interference ability and sensitivity of the vortex flowmeter.

The invention relates to an air-conditioning type three-way flow adjusting valve. The air-conditioning type three-way flow adjusting valve comprises a fluid impact chamber with a fluid impact ball inthe center and three guide pipelines which are correspondingly connected with the fluid impact chamber and have the same structure and are round and rectangular in the middle at two ends; the pipe cavity of the guide pipeline is formed in a shape from the center to the two ends from small to large, the connector end is provided with a filter screen and a flow probe, the central parts of the innerwalls of the upper shell and the lower shell of the guide pipeline are correspondingly provided with arc-shaped grooves which are transversely arranged and corresponds to each other, a cylindrical flexible air bag which can be tightly attached to the grooves after being expanded is arranged in the guide pipeline, and a funnel-shaped flexible anti-backflow nozzle is arranged in the guide pipeline between the flexible air bag and the fluid impact chamber. The inlet end of the anti-backflow nozzle is connected with the fluid impact chamber, and the outlet end of the anti-backflow nozzle is connected with a telescopic spring controlled by a shifting rod shifted by a shifting rod moving control device. The device has the beneficial effects that the guide is completed by the volume change of theflexible air bag, and the service life is long; the sealing performance is good, and the leakage amount is small; the response speed is quick; the flow of one of the outlet channels can be adjusted under the condition of keeping the total flow of the outlets unchanged; a plurality of flow adjusting valves can be simultaneously controlled through a computer control program, and fluid guide, flow adjusting, flow stopping and the like in a complex fluid pipe network can be accurately controlled.

The invention discloses a method, a system and a charging system for improving network disconnection precision, and relates to the field of flow charging. The method comprises the following steps: determining a service data flow accumulated value according to ticket data; triggering a flow probe module to monitor the service data flow in real time when the difference between the off-network threshold value and the service data flow accumulated value is smaller than a preset flow value; and when the service data traffic accumulated value sent by the traffic probe module reaches a network disconnection threshold value, triggering the PCRF to inform the PGW of disconnection of the service data traffic. According to the invention, under the condition that the existing networking mode and the network element processing load of the core network are not changed, the control precision of network disconnection of the post-paid amount of arrival is improved.

The invention discloses a wall hanging stove gas supply pipeline safety monitoring system. The wall hanging stove gas supply pipeline safety monitoring system includes a wall hanging stove and a pipeline for supplying gas to the wall hanging stove; an input end and an output end of the pipeline for supplying gas to the wall hanging stove are provided with a first quantitative acquisition module and a second quantitative acquisition module respectively; the first quantitative acquisition module and the second quantitative module are formed by flow probes and standard pipes; the flow probes are connected to a control system; a comparison module is arranged in the control system; and the control system is electrically connected to a display device. According to the wall hanging stove gas supply pipeline safety monitoring system, acquisition and comparison are simple; it is determined whether slight gas leakage exists or not through number values in the display device, overhaul needs to be performed if so, and in this way, increased use cost of a user due to slight gas leakage can be avoided, and danger to indoor environment caused by serious gas leakage can be avoided.

The invention discloses a combined platinum film gas flow measurement method and a flow meter. The detection rod is inserted into the measuring pipe from the diameter direction, and one or more platinum film probes integrating a flow probe and a temperature probe are fixedly installed on the detection rod, and each probe can sense the gas flow and temperature signals at the same time . The flow and temperature signals are collected and processed to obtain the mass flow of the gas, and the display and remote transmission of the flow and temperature values ​​are realized. The combined platinum membrane gas flowmeter has the characteristics of simple structure, low investment cost, high precision, small pressure loss, wide range ratio (up to about 100 times), and the lower flow limit is almost zero. Among the gas flow detection instruments, there is no flow instrument with such a simple structure and excellent comprehensive performance, and the economic benefits are very obvious. The instrument has an integrated structure and has multi-parameter measurement functions such as flow and temperature.

The invention provides a non-full-tube flow calibration device, and relates to the technical field of flow measurement. The non-full-tube flow calibration device comprises a first water storage tank,a second water storage tank, a water pump, a communicating pipe and a simulated non-full-tube pipeline; the first water storage tank, the water pump, the communicating pipe and the simulated non-full-tube pipeline are communicated in sequence, and a water outlet of the simulated non-full-tube pipeline is arranged corresponding to the second water storage tank; the water pump is used for controlling water output amount of the first water storage tank, the simulated non-full-tube pipeline is provided with an opening, the opening is provided with a measured flow probe, the second water storage tank is used for receiving outlet water of the simulated non-full-tube pipeline, so that recorded data of the measured flow probe is compared with the total water amount of the second water storage tank. The technical problem in the prior art that the calibration method is complicated and operated difficultly is solved. The non-full-tube flow calibration device simulates the use environment of a non-full-tube flowmeter, and the accuracy of the measured flow probe is determined by comparing the total water amount of the second water storage tank with the data of the measured flow probe.

The invention discloses an ejection-type T-shaped full-flow injection device. The ejection-type T-shaped full-flow injection device is composed of three parts, an ejection device (1) of the first partis located on the upper part, a missile-type empennage (2) of the second part is located in the middle, and a T-shaped full-flow probe (3) of the third part is located on the lower part. The ejectiondevice provides the initial kinetic energy of a T-shaped full-flow injection instrument, thus the injection depth of the injection instrument can be effectively increased, the stability of the injection instrument and the injection point precision can be improved through the four-blade missile-type empennage, an acceleration sensor, a force sensor and a tilt sensor are additionally arranged, andthrough a hole pressure sensor, the underwater in-situ test precision of the T-shaped full-flow injection instrument can be further improved. The ejection-type T-shaped full-flow injection device is used for underwater ultra-soft soil strength characteristic testing, has the advantages of being fast, economical, easy to operate, high in accuracy and the like, and is an extra powerful in-situ testtool for evaluating the strength characteristic of underwater ultra-soft soil.

An ultrasonic flow probe (100) comprising a mounting member (101) for mounting on a surface of a conduit and thereby defining a mounting axis (B) perpendicular to the surface,a frame (103) mounted on the mounting member (101), and a plurality of ultrasonic transducers (105) mounted on the frame (103) and aligned along a primary axis (A); wherein the frame (103) and mounting member (101) are configurable such that the primary axis (A) is at an angle to the mounting axis (B) so that, in use, ultrasound passing between the transducers (105) travels at an angle to fluid flowing in the conduit.

The invention provides an ultra-wide-range ultrasonic flowmeter, and the flowmeter comprises a cuboid sound channel, an airflow cavity in the sound channel, an air inlet and an air outlet, wherein theair inlet and the air outlet are formed in the two ends of the airflow cavity. Mounting grooves are respectively formed in the middles of the upper end and the lower end of the airflow cavity, and aflow guide plate is mounted in the mounting grooves; the airflow cavity is divided into two cavities by the flow guide plate; the upper end of the sound channel is provided with two small-flow probe positioning holes which are symmetrically arranged, and the lower end of the sound channel is provided with two large-flow probe positioning holes which are symmetrically arranged. The small-flow probepositioning holes lead to one cavity body in the airflow cavity, the large-flow probe positioning holes lead to the other cavity body in the airflow cavity, and the distance between the two small-flow probe positioning holes is greater than the distance between the two large-flow probe positioning holes. The flowmeter is divided into two cavities, probes with different specifications and distances can be arranged, the measuring range is wide, and the applicability is high; the middle part is separated by a steel plate, so airflow is stable, turbulence is reduced, and the precision is improved.