340results about "Fluid speed measurement" patented technology

The invention discloses a device for measuring flowability of explosive modeling powder, which comprises a step-press-loading analogue unit, a timing and weighing unit and a computer control unit, wherein the step-press-loading analogue unit directly and indirectly drives a screw rod which extends into a blanking bin to rotate and perform reciprocating movements along an axial line and drives a pusher dog in the blanking bin to perform the reciprocating movements along an arc section through the combined action of a cylinder and a pneumatic reversal valve so as to ensure that the explosive modeling powder in the blanking bin falls into the timing and weighing unit, and the process more truly imitates an explosive conveying process of an explosive step-press process. The timing and weighing unit transmits a weighing value of the explosive modeling powder which falls in the timing and weighing unit to the computer control unit in real time, and the computer control unit calculates the instantaneous flow speed of the explosive modeling powder of a north side and generates a flow speed-time curve according to sampling data. The device can measure the flowability of the explosive modeling powder so as to provide an objective basis for choosing a proper explosive step-press process for the explosive modeling powder.

The application discloses a kind of evaporator inner plug testing equipment of accurate positioning, it is related to evaporator performance detection technical field, including test table, advancing support unit, test mark unit and sensing unit, wherein test table is used for signal control and reception, advancing support unit is used for the support travel of evaporator pipeline, test mark unit is used for testing whether the internal plug point of evaporator appears, sensing unit is used for detecting the viscosity of plug point plug, in the advancing process of advancing support unit in evaporator, whether the internal plug of evaporator appears is detected by test mark unit, while the plug point is marked, it is convenient for subsequent accurate positioning plug point, the viscosity of plug point plug that appears is detected by sensing unit, it is convenient for subsequent corresponding cleaning means, improve maintenance efficiency.

This invention discloses a flue gas velocity detection system and method based on dual-core optical fiber sensing. The method includes using a dual-core optical fiber probe, which has a transmitting fiber core and a receiving fiber core arranged in parallel within a quartz cladding. Two optical signals of different wavelengths emitted by a light source are coupled to the transmitting fiber core via wavelength division multiplexing (WDM) to achieve dual-wavelength common-path transmission. The receiving fiber core picks up the echo signal scattered by flue gas particles. After signal processing and temperature compensation, transient thermo-optical correction is performed, along with environmental refractive index and geometric correction, to output the final flow velocity data. This invention can achieve real-time, high-sensitivity, and high-precision measurement of flue gas velocity in small-diameter flues under high-temperature and dusty environments. It can be widely applied to combustion experiments, emission measurement, industrial flue monitoring, and airflow characteristic research in carbon emission monitoring systems.

The application discloses an SCR denitration flue gas flow field monitoring method, device, program product and storage medium, and relates to the technical field of flue gas treatment. The method comprises the following steps: uniformly dividing an SCR inlet section according to the number of ammonia injection lattices to obtain a plurality of monitoring areas; acquiring flue gas flow velocity data of the monitoring areas, and constructing a flow velocity matrix of each monitoring area according to the flue gas flow velocity data; calculating a comprehensive flow field coordination index of the whole SCR inlet section according to the flow velocity matrix of each monitoring area; determining target monitoring areas that need to be controlled by ammonia injection according to the comprehensive flow field coordination index; calculating a flow compensation coefficient of each target monitoring area according to the flow velocity matrix of the adjacent monitoring area corresponding to each target monitoring area; and controlling each target monitoring area by ammonia injection according to the flow compensation coefficient. The technical scheme provided by the application can improve the accuracy of ammonia injection amount control.

The application discloses a non-orthogonal transducer array three-dimensional ultrasonic wind speed and direction instrument which can be carried on a unmanned aerial vehicle and applied to the field of wind speed and direction instruments, and the non-orthogonal transducer array is adopted to reduce the influence of turbulence on wind measurement accuracy; when the turbulence degree generated by one group of transducers is relatively large, the other two groups of transducers can compensate the data, so that high-precision wind speed and direction measurement is realized; meanwhile, when the unmanned aerial vehicle encounters strong wind, the probe fixing rod will be broken, so that the unmanned aerial vehicle is prevented from losing control due to the large wind area of the orthogonal annular support, and the fixed base plate and the elastic thin rod are arranged to recycle the broken and fallen orthogonal annular support and ultrasonic probe, so that the high-altitude falling object is not easy to form, and the orthogonal annular support and the ultrasonic probe are effectively protected, the subsequent recycling and reuse of the orthogonal annular support and the ultrasonic probe are facilitated, and the wind direction and speed detection in strong convection weather such as strong wind is applicable.

A system for determining the flow properties of a fluid in a fluid unit, comprising: a light source configured to generate a plurality of optical signals; marker elements suspended in a fluid; a plurality of photonic units, each comprising a photonic element and a flow channel; and a measuring unit configured to: determine a first measurement based on the plurality of optical signals and the marker elements in a flow channel of a first photonic unit of the plurality of photonic units, determine a second measurement based on the plurality of optical signals and the marker elements in a flow channel of a second photonic unit of the plurality of photonic units, wherein the flow channel of the first photonic unit and the flow channel of the second photonic unit are fluidically connected.and a property relating to a flow of the fluid or the marker elements is determined based on the first and second measured values, wherein the determination of the property further comprises determining a macroscopic flow velocity (U) of a fluid containing the marker elements, wherein the macroscopic flow velocity (U) is determined as a function of a flow rate (Q) of the fluid through a cross-sectional area (A) of the fluid unit, wherein Q depends on an applied pressure gradient (VP) such that U = Q / A, wherein the determination of the property further comprises determining a permeability (κ) of a channel of the fluid unit as a function of a viscosity of the fluid (µ), the macroscopic flow velocity (U) and a pressure gradient VP such that κ = µU / (-∇P).

The invention relates to a micromechanical component for a sensor device, having a substrate (10) with a substrate surface (10a), at least one stator electrode arranged on the substrate surface and / or on at least one intermediate layer at least partially covering the substrate surface, the at least one stator electrode each being formed from a first semiconductor layer and / or a metal layer, at least one actuator electrode arranged adjustably, the at least one actuator electrode each being formed from a second semiconductor and / or metal layer (P2), a membrane spanning the at least one stator electrode and the at least one actuator electrode, the membrane having a membrane outer side (18a) oriented away from the at least one stator electrode and the at least one actuator electrode, the membrane outer side being formed from a third semiconductor layer and / or a metal layer (P3), a stiffening structure and / or a protection structure (54) protruding on the membrane outer side being formed from a fourth semiconductor layer and / or a metal layer (P4).

The application provides a highland river surface flow speed inversion method, device, medium and computer program, unmanned aerial radar and a spectrometer are used to collect surface flow speed data and optical images along a river section respectively; a digital river polygon is obtained; a river bank buffer zone is constructed along the river bank, meteorological, geomorphological characteristic variables and vegetation indexes of the river bank buffer zone are obtained; hydrological geographical characteristic variables of the river are obtained; the surface flow speed data is mapped to a SWOT pixel cloud, and multiple river section surface hydrological characteristic variables and relative center line geometric characteristic variables including longitudinal water surface slope are calculated based on WSE data; a machine learning model is trained based on the obtained characteristics, and an inversion model of the highland river surface flow speed is obtained. The application only needs a small amount of measured data, can effectively overcome the nonlinear damping effect of the complex boundary of the high gradient river channel on the flow speed, and realizes spatial continuity and high resolution inversion of the surface flow speed of the river in the highland area without a measuring station.

The application discloses a kind of breeding environment multidimensional data integration processing and early warning system.The system includes: the main control computing unit deployed in factory local, multiple sensor anchor point clusters distributed in breeding pool interior and data aggregation gateway;Each sensor anchor point cluster contains basic physicochemical probe component, environmental flow field component and biological observation component;The main control computing unit calculates physical transfer time delay according to three-dimensional flow velocity vector and aligns time series data using dynamic time warping algorithm, and the adjacency matrix between the nodes of internal model is dynamically calculated according to three-dimensional flow velocity vector to output environmental anomaly probability score;When the fluctuation rate of physicochemical parameter or environmental anomaly probability score meets the condition, data aggregation gateway sends hardware interrupt instruction to dormant biological observation component.This application can accurately compensate material propagation data time delay, accurately identify abnormalities, and reduce energy consumption using cross-modal wake-up mechanism, to ensure system space-time causal closed loop and bandwidth communication efficiency.

A MEMS microphone according to the present embodiment comprises: a first substrate; a second substrate disposed on the first substrate; an adhesive layer disposed between the first and second substrates; a MEMS structure disposed on the second substrate; a signal processing device disposed on the second substrate and spaced apart from the MEMS structure; and a capacitor disposed to be spaced apart from the MEMS structure and the signal processing device, wherein the capacitor comprises a first external electrode and a second external electrode disposed at opposite ends thereof, and a plurality of internal electrodes and dielectric layers disposed between the first external electrode and the second external electrode, and the first substrate, the second substrate, and the MEMS structure are stacked in a first direction, while the plurality of internal electrodes are stacked in a second direction perpendicular to the first direction.

This invention discloses a micro-well-washing groundwater sampling system and method, including a sampling point, which is a section of water inside the well pipe; it also includes pumping equipment and sensor equipment, both located at the sampling point; it further includes two groundwater detectors and a detection host, with the two groundwater detectors located above and below the sampling point, respectively. The two groundwater detectors are used to monitor the water flow between the upper and lower water bodies and the sampling point; the detection host is used to receive the real-time water flow data monitored by the groundwater detectors and adjust the pumping speed of the pumping equipment in real time according to the water flow data and the pumping strategy; the detection host is used to receive the water quality indicators collected in real time by the sensor equipment; the detection host judges whether the water at the sampling point meets the preset sampling conditions at preset time intervals, and collects water samples if the preset conditions are met.

The present application provides an object identification method, apparatus, device, and storage medium applicable to various scenarios such as safety protection, cloud technology, artificial intelligence, smart transportation, and driving assistance. In such a method, it includes the steps of obtaining the distance between an object to be identified and an identification device using the identification device, and when the distance is not equal to the target distance, controlling a wind pressure generator to adjust the wind pressure acting on the object to be identified according to the distance, so as to move the object to be identified to a position separated from the identification device by the target distance under the action of the wind pressure, and identifying the object to be identified separated from the identification device by the target distance and obtaining an identification result. In the embodiments of the present application, since the wind pressure acting on the object to be identified is determined by the distance between the object to be identified and the identification device, according to the sensed wind pressure, the amount of distance by which the object to be identified should be moved can be accurately obtained. As a result, the object to be identified can be moved to the target distance with only a small number of movements, so it is possible to improve the identification experience while enhancing the object identification efficiency.

The present application relates to rainwater collection and utilization technical field, disclose a kind of drainage pipe network overflow pollution reduction and resource utilization method, comprising: installing heteromorphic turbulence unit in pipe network water inlet to induce pipe wall mechanical vibration, vibration signal is collected using acoustic detection unit and extracting main vibration frequency, simultaneously using non-contact electrode to collect fluid conductivity signal, based on signal time delay calculation fluid real-time flow rate, according to real-time flow rate correction main vibration frequency obtains characteristic frequency deviation, weighted calculation characteristic frequency deviation and conductivity signal instantaneous gradient, and generate split characteristic value, extract low-frequency energy distribution in vibration signal to determine scour intensity index, according to split characteristic value and scour intensity index switch flow path, the present application is decoupled by acoustoelectric coupling to flow state and concentration, effectively capture sediment starting feature, improve overflow pollution monitoring precision and prediction ability.

The application belongs to the technical field of high-temperature flow field velocity testing, and discloses a PIV endoscope protection device for measuring high-temperature airflow velocity field. The device is characterized by a shell, an inner wall, a sapphire glass tube, a partition plate, a light guide window, a water inlet channel, a water outlet channel, an optical element, a mounting seat and a cavity. The shell, the inner wall and the sapphire glass tube are coaxially sleeved and form two interlayers respectively. The water inlet channel and the water outlet channel in the shape of Chinese character 'ji' are separated by the partition plate between the shell and the inner wall, so that the circulation of cooling water is realized, and the endoscope optical assembly and the sapphire glass tube are efficiently cooled. The structure can control the temperature near the sapphire glass tube below 500K under the extreme condition that the external environment temperature is as high as 2000K, effectively insulate high temperature and relieve thermal stress concentration, and ensure stable signal transmission and imaging measurement. Compared with the prior art, the endoscope probe can accurately reach the measurement area that cannot be covered by the traditional light source, and efficient and stable measurement of the flow field in high-temperature and complex narrow space can be realized.

Embodiments of the present application provide a wind speed estimation method, device and aircraft. In the wind speed estimation method, flight data of the aircraft is obtained, and then a horizontal disturbance acceleration of the aircraft in a navigation coordinate system is obtained according to a vertical acceleration, a horizontal acceleration and an attitude angle of the aircraft in the navigation coordinate system in the flight data. Further, an air resistance of the aircraft in the horizontal direction is obtained according to a mass of the aircraft and the horizontal disturbance acceleration of the aircraft in the navigation coordinate system. Finally, the wind speed of the flight environment of the aircraft is obtained according to the air resistance and a speed of the aircraft relative to the navigation coordinate system, so that the wind speed of the flight environment of the aircraft can be estimated, the accuracy of the wind speed estimation is improved, and in the flight adaptation to different climate environments, only a few key parameters need to be adapted, so that the engineering practicability of the model is greatly improved.

The present application provides a kind of lubricating oil sound velocity calibration method considering refrigerant dissolution, for solving the problem of air conditioner compressor due to refrigerant dissolved in lubricating oil, sound velocity drift, oil film thickness measurement inaccuracy.The method forms oil film area by adjustable spacing first solid component and second solid component, and obtains reference signal and reflection signal using ultrasonic transceiver.When calibration, first, two components are placed in sealed box and immersed in lubricating oil, after pumping, inject refrigerant to a certain pressure, simulate actual dissolution condition, then measure current oil film thickness.Determine resonance frequency by the ratio of reflection signal and reference signal, and calculate accurate sound velocity combined with oil film thickness.The present application effectively reduces the oil film measurement error caused by sound velocity drift, and helps to improve the service life of compressor.

The application relates to the technical field of pressure sensors, in particular to a flexible pressure sensor based on PDMS and a preparation method thereof, the flexible pressure sensor based on PDMS comprises a flexible substrate, a bottom electrode and a top electrode arranged from bottom to top, and further comprises a PDMS dielectric layer, the PDMS dielectric layer is composed of two pieces of PDMS films with different surface microstructures, and the PDMS dielectric layer is located between the bottom electrode and the top electrode or on both sides. On one hand, the method can one-time prepare two pieces of PDMS with complementary surface microstructures based on petal templates, effectively increases the contact and deformation of the PDMS microstructure, and improves the sensitivity of the pressure sensor; on the other hand, a plurality of low-cost molds are arranged in a specific manner, a PDMS with a series of microstructures and a large size can be obtained, and various applications of the PDMS capacitive pressure sensor or the PDMS resistance pressure sensor with different sizes and microstructures in different scenes can be realized.

A fluid transfer system is described. The fluid transfer system includes an active element, a structural element coupled with the active element, and a cushion. The active element has a leading edge and is configured to undergo vibrational motion. The cushion is between the leading edge of the active element and a portion of the structural element. The cushion mitigates collisions between the portion of the structural element and the leading edge of the active element.

An inertial measurement unit and a manufacturing method therefor. The inertial measurement unit comprises: a first substrate (1); a dielectric layer (2), wherein the dielectric layer (2) is stacked on the first substrate (1), and notches (15) are formed on the dielectric layer (2); a first conductive layer (3), wherein the first conductive layer (3) is stacked on the dielectric layer (2); a second conductive layer (5), wherein the second conductive layer (5) is supported on the first conductive layer (3) by means of support portions (7); a second substrate (9), wherein the second substrate (9) covers the second conductive layer (5) by means of a bonding structure (8), a sealed space is formed between the second substrate (9) and the first substrate (1), the sealed space comprises a plurality of separated chambers (14), and the chambers (14) have different chamber pressures; an exhaust channel (12), communicated with at least one chamber (14), wherein the exhaust channel (12) is used for communicating the chamber (14) with the outside; and a sealing portion, used for sealing the exhaust channel (12). A plurality of chambers (14) having different chamber pressures are provided on a single wafer, which is conducive to manufacturing of an inertial measurement unit in which two or more inertial sensors are integrated.

The application discloses a kind of asphalt concrete panel temperature dissipation rate testing device and method under big wind environment, device includes simulation test device and in-situ testing device;Method includes the following steps: one, pours asphalt concrete test block;Two, adjust temperature compensator;Three, set up big wind environment;Four, acquisition asphalt concrete test block during the formation process multiple sets of key parameters;Five, change big wind environment and obtain multiple sets of key parameters;Six, obtain multiple sets of key parameters in the formation process of asphalt concrete test block under a variety of different big wind environment;Seven, fitting temperature dissipation rate calculation model of the asphalt concrete type required in construction site;Eight, cast in place asphalt concrete panel and pre-embed multiple third temperature sensors located at different heights;Nine, using in-situ testing device to test asphalt concrete panel temperature dissipation rate under the big wind environment of field. Obtain temperature dissipation rate by fitting temperature dissipation rate calculation model, provide technical support for asphalt concrete temperature control and crack prevention.

Optical component (100), comprising: a component substrate (102); a chip of an application-specific integrated circuit (110; 310) arranged on the component substrate (102), wherein the chip of the application-specific integrated circuit (110; 310) includes a detector (112; 312); at least one non-optical sensor chip (116; 316) arranged on the component substrate (102); a preformed polymer field unit cell (128; 328) arranged on the component substrate (102), wherein the preformed polymer field unit cell (128; 328) has at least one cavity (122; 322) and at least one side wall (124; 324) is configured to limit crosstalk between the application-specific integrated circuit (110; 310) and the at least one non-optical sensor chip (116; 316); and a glass cover (134; 334) arranged on the preformed polymer field unit cell (128; 328).

An electromagnetic transducer intended to measure three-dimensional velocity components of a flow of an electrically conductive fluid. An electromagnetic transducer intended to measure the three-dimensional velocity components of a flow of an electrically conductive fluid, including a cylindrical metal tube forming a core with high magnetic permeability, which tube extends along a central axis (Z), comprising a central portion and two end portions, on either side of the central portion, each including three bosses, arranged at 120° relative to one another about the central axis (Z) and each delimiting a flat surface, parallel to the central axis (Z); an electrical coil (12), called primary coil, wound around the central portion of the tube; six electrical coils, called receiver coils, each wound around one of the flat surfaces, or six Hall effect sensors, each arranged on one of the flat surfaces.

The application discloses a preparation method of a MEMS infrared detector wafer and relates to the technical field of semiconductor wafer preparation. The preparation method comprises the following steps: depositing a seed layer on a readout circuit wafer; performing photolithography etching treatment on the seed layer by using a photolithography etching process to reserve the seed layer in the area where a solder ring is located; forming a polyimide layer on the top surface of the readout circuit wafer and the circumferential side of the seed layer, and obtaining a MEMS structure deposited on the surface of the readout circuit wafer through solidification treatment; exposing part of the seed layer and depositing to form a solder ring by using a photolithography etching process; exposing the pad structure of the readout circuit wafer by using a photolithography etching process, and obtaining a MEMS infrared detector wafer after sequentially performing electrical testing and adhesive removal treatment. The preparation method can avoid cavity pollution caused by the deposition of the seed layer on the organic sacrificial layer, reduce the manufacturing cost, improve the process efficiency, and prevent the test pads from being polluted and corroded in the processing process.

The present application belongs to the technical field of wind speed test tooling, and particularly relates to a wind speed test tooling for the inside of a gas quenching furnace. The present application comprises a gas quenching furnace main body, the inside of which is provided with a test tooling fixing seat, the inside of which is provided with a fixing rotating part, and the test tooling fixing seat is provided with a telescopic speed measurement assembly which can rotate. The telescopic speed measurement assembly can simultaneously measure the speed of multiple measuring points, and the measured wind speed is transmitted to a positioning control part and then to external receiving equipment. The fixing rotating part controls the angle of the telescopic speed measurement assembly, and the positioning control part controls the length of the telescopic speed measurement assembly. The point position of the measuring point to be tested is determined remotely, the detection range is large, the degree of automation is high, the built-in independent power supply exports the wind speed data in a closed environment, effectively reduces the speed measurement time, reduces the influence of time factors on the speed measurement result, and improves the speed measurement accuracy.

The utility model discloses a portable circulating measuring point flue gas flow rate comparison device belongs to flue gas flow rate detection technical field, including sleeve, sleeve one end fixed installation has the air path dispersion disc, the sleeve is through the groove of inside setting and has the telescopic link of sliding installation, the sleeve and telescopic link outer wall all are set up and are inserted in the hole, in the utility model, through setting up the ventilation component in, through this design, realized in the process of detecting, can through the ventilation column installation in the sleeve and telescopic link outer wall suitable inserted hole and with the trachea connection to the trachea and air path dispersion disc with gas delivery to detection module in the detection, can through the second mounting bushing to the opening of the trachea that does not need to plug up simultaneously, thereby when adjusting, only need to change the position of ventilation column can complete the detection to different positions, and do not need to adjust the device whole again too much and can reduce the error caused thereby.

A first and second substrate (24,25) are bonded to each other to form a 3D assembly of micro-electronic components. Both substrates comprise a plurality of first cavities (17) open to the respective bonding surfaces (30) and at least one substrate comprises a second cavity (10) that is larger than the first cavities in terms of its in-plane dimensions, and possibly also in terms of its depth. Prior to bonding, an electrically conductive layer (16) is produced conformally on each substrate. Said layer is patterned in the large cavity or cavities (10) and in said large cavity or cavities a micro-electronic device or a portion thereof (11) is fabricated. Thereafter, the bonding surfaces are planarized, removing the conformal layer (16) from said bonding surfaces (30), after which the substrates are bonded to form the assembly, wherein the first cavities of both substrates are brought into mutual contact to form an electrical connection. Possibly, the first cavities (17) may be filled with a contact material (33) prior to the planarization step. Any device in the large cavities may be contacted through suitable connection means such as TSV connections (4,5) or back end of line interconnect levels.

To provide an electromagnetic transducer intended to measure two-dimensional velocity components of flow of a conductive fluid.SOLUTION: An electromagnetic transducer 10 intended to measure two-dimensional velocity components of flow of a conductive fluid, the electromagnetic transducer 10 comprises: a cylindrical metal tube 11 forming a core with high magnetic permeability, which tube extends along a central axis Z, including a central portion and two end portions, on either side of the central portion, the two end portions of the cylindrical metal tube 11, each including two protrusions 13.1 to 13.4, opposed to one another relative to the central axis Z and each delimiting a flat surface, parallel to the central axis Z; an electric coil 12 called primary coil and wound around the central portion of the tube; four electric coils 14.1 to 14.4 called receiving coils and each wound around one of the flat surfaces, or four Hall effect sensors each arranged on one of the flat surfaces.SELECTED DRAWING: Figure 13

The application relates to the technical field of air monitoring, in particular to a carbon monitoring device with photovoltaic panel solar energy storage, which comprises a base, a sampling cylinder rotatably connected to the outer wall of the base, and a detection chamber arranged in the sampling cylinder. The application utilizes wind power to change the direction, so that the detection value of the wind speed sensor is higher than the preset value in windy weather, at this time, the motor does not work, the wind resistance of the one end of the sampling cylinder away from the detection chamber is increased through the set wind shield, so that the sampling cylinder is driven to rotate under the action of the wind force, the detection chamber is opposite to the wind direction, the airflow air is blocked at the detection chamber, a local pressure stagnation area is formed, the forced stagnation air is continuously supplied, the air convection rate near the detection chamber is greatly intensified, the airflow flow into the flow channel is increased, the air update speed on the surface of the carbon dioxide sensor is accelerated, the response time is shortened, and the detection efficiency is improved.

The present application relates to the technical field of river flow, and particularly relates to a river flow determination method and device, electronic equipment and a storage medium. A first water surface video frame collected by at least one floating camera corresponding to a flow section of a target river is acquired; each first water surface video frame is identified to determine a first initial surface flow rate corresponding to each first water surface video frame; a second water surface video frame collected by at least one shore-based camera corresponding to the flow section of the target river is acquired; each second water surface video frame is identified to determine a second initial surface flow rate corresponding to each second water surface video frame; and based on the first initial surface flow rate and the second initial surface flow rate, a target river flow of the flow section corresponding to the target river is determined. The accuracy of the flow rate data is ensured, full-section coverage is achieved, and the final calculated flow result is more accurate and reliable.