51results about "Fluid speed measurement using thermal variables" patented technology

To provide a micro flow channel chip capable of removing air bubbles generated inside a micro flow channel, while preventing elution of an adhesive component into the flow channel to suppress a reaction inhibition of a solution inside the flow channel, and also to provide a manufacturing method thereof.SOLUTION: A micro flow channel chip 1 includes: a substrate 10; a partition layer 11 forming a flow channel on the substrate 10; and a top cover layer 12 formed on a surface at a side opposite to the substrate 10 of the partition layer 11 and configured to be served as a lid of a flow channel part 3. The top cover layer 12 includes an air bubble removal part 7 being part of the top cover layer 12 and configured to remove air bubbles generated in the flow channel part 3. No adhesive layer is formed between the partition layer 11 and the top cover layer 12.SELECTED DRAWING: Figure 1

A system 20 for monitoring a tubular structure 22 having a length, comprising: a sensor module array 32 having a plurality of sensor modules 34 configured to sense one or more parameters relating to 2

A microchip for liquid sample analysis having a flow path and a liquid reservoir therein, comprising: a substrate having a bonding surface provided with a groove forming the flow path, a depression provided in a part of the groove and serving as a liquid reservoir storing a liquid, and a wall part provided between the groove and the depression to block the outflow of the liquid from the liquid reservoir to the flow path; and a film bonded to the bonding surface of the substrate, covering the groove to form the flow path and the liquid reservoir, wherein among the bonded areas of the substrate and the film, the bonded portion between an end face of the wall part of the substrate and the film has a first bonding strength such that it peels off upon application of pressure of 30 kPa or more and less than 100 kPa, and the other bonded areas have a bonding strength stronger than the first bonding strength.

The application relates to the technical field of wind speed detection, in particular to a wind speed detection device for a wind power project, which comprises a box body, a detection wind pipe, a low-speed detection module, a high-speed detection module, an adjusting assembly and a maintenance assembly. The detection wind pipe is arranged through the box body, the adjusting assembly is arranged on the detection wind pipe, the low-speed detection module and the high-speed detection module are arranged on the adjusting assembly, when the wind speed in the detection wind pipe is greater than the set value of the low-speed detection module, the adjusting assembly is electrified to work and drives the low-speed detection module and the high-speed detection module to move right, and when the wind speed in the detection wind pipe is less than the set value of the high-speed detection module, the adjusting assembly is electrified to work and drives the low-speed detection module and the high-speed detection module to move left. The low-speed detection module, the high-speed detection module, the adjusting assembly and the maintenance assembly are arranged, the detection accuracy is ensured on the basis of meeting the detection requirements of super-low speed to limit wind speed, and the power generation efficiency of the wind turbine is ensured.

The present invention relates to a fluid tip (1) comprising a body (2), a main inlet (5), and at least one secondary inlet (6) not coaxial with the main inlet (5), wherein each main inlet (5) and secondary inlet (6) is intended to receive a substance and an outlet (7), the main inlet (5) is connected to the outlet (7) by a main channel (8) having a substantially straight portion defining the central axis Z of the fluid tip (1), and the secondary inlet is also connected to the outlet (7) by a secondary channel (9). According to the present invention, the secondary channel (9) is divided into at least two secondary ducts (11) of the same size that merge with the main channel (8) into a circular injection duct that is evenly distributed around the central axis Z.

To provide a specimen analysis cartridge and the like with increased liquid leakage durability.SOLUTION: A specimen analysis cartridge includes a first substrate having a microfluidic channel formed on at least one surface thereof, a second substrate arranged opposite the surface on which the microfluidic channel is formed on the first substrate, and a photocurable resin layer by which the first substrate and the second substrate are bonded together. The first and second substrates include at least one of a cyclo-olefin polymer and a cyclo-olefin copolymer.SELECTED DRAWING: Figure 1

To provide an anemometer that can measure wind speed with high accuracy without requiring complicated temperature compensation. [Solution] This wind speed sensor measures the wind speed of a gas by detecting temperature changes due to heat transfer changes caused by a heat source, which is positioned downstream of a heat source located inside a straight pipe that flows in one direction. The heat source is placed on the main surface of an insulating main substrate, and the heat source is supported by thermal insulation between it and the main surface of the main substrate. A housing is positioned on the main substrate to cover the heat source and the heat source, forming a pipe with openings at both ends.

The application relates to the technical field of sensors, in particular to a redundant design airflow sensor with a fault self-recovery function, which comprises a shell, an upper shell, a force storage assembly, a partition plate, a sliding plate, an adjusting assembly, a heating rod and an upper cover, the upper shell is connected to the upper side of the shell, the force storage assembly is connected to the outer wall of the shell, the partition plate is connected to the middle part of the inner cavity of the shell, the sliding plate is connected to the partition plate, two adjusting assemblies are respectively connected to the left and right sides of the inner cavity of the shell, two heating rods are respectively connected to the upper sides of the two adjusting assemblies, the upper side of the partition plate is connected with the upper cover, the inner wall of the upper shell is provided with a sliding groove, and the sliding groove is arranged in an inclined manner; the two heating rods are alternately extended through the rotation of the upper shell, the stability of the airflow sensor is guaranteed, the outer wall of the descending heating rod is in contact with the upper cover, impurities and attachments are removed, and the service life of the airflow sensor is prolonged.

The application provides a screening device and method and application of small molecules for inducing or inhibiting protein polymerization, adopts a solid-state quartz nanopore as a core detection device, drives target proteins or complexes of the target proteins and small molecules to pass through a nanoscale pore, records ion current changes caused by each time of perforation event in real time, analyzes peak current and residence time characteristic values of each event, and can identify whether the proteins are in monomer, oligomer, aggregation or LLPS state. Meanwhile, the nanopore sensing is combined with small molecule processing, a mapping relationship between current signal changes and aggregation state regulation is established, and screening of small molecules for inducing or destroying protein aggregation behavior is realized. The technology has multiple advantages of label-free, single molecule, real-time monitoring and adaptation to multiple protein aggregation states, and breaks through the bottleneck of throughput and resolution capacity of existing methods.

The application discloses a bandgap thin film structure device and a preparation method thereof. The bandgap thin film structure device comprises a substrate, a sacrifice layer formed on a first surface of the substrate, a first silicon nitride layer formed on the sacrifice layer and parallel to the substrate, and the first silicon nitride layer has a continuous and stepless plane. The first silicon nitride layer comprises a bandgap thin film area and a peripheral part surrounding the bandgap thin film area, the surface of the first silicon nitride layer has bandgap holes arranged periodically, each bandgap hole has a release hole around it, the bandgap holes and the release holes are distributed in the bandgap thin film area, the bandgap holes and the release holes are used for etching the sacrifice layer between the substrate and the bandgap thin film area, the central area of the bandgap thin film area has a defect area, and the defect area does not have the bandgap holes. A second silicon nitride layer is formed on a second surface of the substrate opposite to the first surface. A cavity in which the bandgap thin film area is suspended is formed between the bandgap thin film area of the first silicon nitride layer and the first surface, and the peripheral part is supported by the unetched part of the sacrifice layer.

A sensor for sensing direction of fluid-flow, the sensor comprising: a heating element; a first active temperature sensing element; and a processor; wherein the processor is configured to: receive a first signal corresponding to a first sensed temperature from the first active temperature sensing element; and determine a direction of fluid-flow based on a difference between the first sensed temperature and a threshold value. A method for sensing direction of fluid-flow and a method for manufacturing a sensor are also described.

The invention relates to a microfluidic structure and a method for dispensing a liquid. The microfluidic structure has a dispensing channel (10) with a nozzle (16), a sample channel (22) opening into the dispensing channel (10), and a suction channel (24) branching off from the dispensing channel (10) downstream of the opening of the sample channel (22) and upstream of the nozzle (16).The procedure comprises the steps of providing a microfluidic structure, supplying a liquid from the sample channel (22) into the dispensing channel (10), aspirating the liquid downstream of the orifice of the sample channel from the dispensing channel through a branch into the aspiration channel (24), and applying a pressure pulse on the inlet side (12) of the dispensing channel (10), whereby the liquid is ejected through the nozzle (16) between the orifice of the sample channel (22) and the branch of the aspiration channel (24), the liquid experiencing a higher flow resistance in the sample channel than in the dispensing channel from the orifice of the sample channel to the nozzle.

A system for optical analysis of biological samples is disclosed. This system can function as a point-of-care testing system and includes one or more analysis modules, each configured to receive a corresponding microfluidic disk and perform optical analysis on the corresponding biological sample. The system may include a housing, chassis and gantry unit, drawer, gripper, pipette, shaker, capping / removing device, multiple analysis modules, detection unit, thermal management unit, control unit, or any combination thereof.

A method of manufacturing a device is a method of manufacturing a device including a cavity and comprises a joining step and an internal pressure adjusting step. In the joining step, two joining targets are joined to each other, thereby forming the cavity and sealing a gas adsorber in the cavity. The gas adsorber allows gas in the cavity to be adsorbed thereon by application of light. In the internal pressure adjusting step, an internal pressure in the cavity is adjusted by application of the light to the gas adsorber after the joining step.

The application provides a biological safety cabinet airflow flow rate detection calibration device and a working method thereof, which comprises a detection probe structure, the detection probe structure comprises a placement shaft, the top of the placement shaft is provided with a driven gear, the bottom of the placement shaft is provided with a rotating pipe, the number of the rotating pipes is multiple, and multiple driven gears are distributed at equal intervals on the outer wall of the placement shaft. The application has a reasonable design. The detection probe contact that can rotate is arranged in the probe push-in structure, the gas groove on the outer wall of the detection probe structure is aligned with the gas inlet groove, then the probe push-in structure is inserted into the inside of the biological safety cabinet structure, the detection probe structure also enters the inside of the biological safety cabinet structure, then the gas enters the inside of the gas groove through the inlet groove and carries away the heat of the detection wire, the heat of the detection wire is detected by the external equipment, the airflow flow rate is detected, and the multiple rotating pipes can quickly detect the position of one row.

This invention discloses a method for visually measuring the wind speed of an airflow field. The measurement method includes six steps: placing a constant-power electric heating plate with a temperature higher than that of the airflow in the path of the airflow to be measured; using a thermal imager to photograph the airflow in front of the constant-power electric heating plate to obtain a thermal image of the temperature distribution of the constant-power electric heating plate during heat exchange; exporting the temperature values ​​from the image; using a hot-wire anemometer to detect the air speed at a specific point; fitting a correlation equation using the temperature and velocity values ​​at the specific point; exporting the temperature and coordinate values ​​of N or all pixels in the temperature distribution image of the electric heating plate, and substituting them into the correlation equation to obtain the velocity values ​​at each point in the airflow field. This allows for a direct visualization of the velocity distribution and range of the measured airflow field. This invention can accurately acquire the velocity field of the airflow, and the method is applicable to the velocity field detection of various complex airflows, and can accurately determine the diffusion range of a gas jet.

A microfluidic assembly includes a jack for forcing a base and a cover together to sandwich a microfluidic chip between base and the cover, with the base and the cover bearing against the microfluidic chip to apply a confining pressure to the microfluidic chip, and with a seal compressed between the microfluidic chip and the base to seal a fluid channel of the base in fluid communication with a microfluidic inlet of the microfluidic chip. A microfluidic chip includes a silicon wafer having at least a first microfluidic channel etched therein, and a chemically strengthened glass panel bonded to the silicon wafer to cover the microfluidic channel.

The present invention aims to provide a technology that can improve the organic solvent resistance of microfluidic chips. [Solution] The microfluidic chip of the present invention comprises a substrate portion, a partition wall portion that forms a channel on the substrate portion, and a lid portion that is disposed on the portion of the partition wall portion opposite to the portion that contacts the substrate portion and covers the channel, wherein the partition wall portion is formed of a photosensitive resin having radical crosslinking properties. Furthermore, in the microfluidic chip of the present invention, the partition wall portion and the lid portion may be joined at an interface that has been treated to be hydrophilic.

This invention relates to the field of wind speed measurement technology, specifically to a wind speed measurement method and system based on multi-directional correlation calculation. The method includes the following steps: obtaining the coordinate data of measuring points and calculating the correlation with temperature sequences to obtain time correlation; sorting the propagation order and calculating the airflow path by connecting lines; judging directional consistency to select continuous paths; calculating and superimposing the order of the connecting lines to obtain the airflow expression; and filtering and outputting the wind speed results based on the directional distribution. In this invention, the rate is obtained by differentiating the temperature sequence and determining the correlation through correlation analysis. Based on the correlation, the measuring points are sorted and the airflow path is calculated by connecting lines. The paths are filtered based on directional consistency, and the airflow expression is obtained by calculating and superimposing the order of the connecting lines. The distribution is obtained by comparing concentration to filter and output the measurement results. This effectively eliminates interference errors caused by irregular disturbances in the calculation and ensures the extraction of core dynamic information, significantly improving the realism of multi-directional spatial flow field analysis and measurement accuracy.

The present invention relates to a flow path device and a manufacturing method thereof. A flow path device (1) includes a substrate (4) having a first face (4a) and a second face (4b) facing away from each other, and a pair of a first electrode (10) and a second electrode (11). The substrate (4) has a flow path (7) extending along the first face (4a) and the second face (4b), and the pair of the first electrode (10) and the second electrode (11) forms an electric field intersecting the flow path (7) in a direction in which the first face (4a) and the second face (4b) face away from each other.

The utility model provides a kind of underground water multi-parameter intelligent monitoring device, it is related to underground water monitoring technical field, comprising: intelligent monitoring instrument probe, intelligent monitoring terminal and connecting wire, the intelligent monitoring instrument probe is connected with the intelligent monitoring terminal by the connecting wire;Intelligent monitoring instrument probe includes probe shell, temperature monitoring module and water level monitoring module are installed in probe shell front end, inside installation has conductivity monitoring module, flow velocity and flow direction module and signal processing and communication module;The intelligent monitoring terminal branch display area includes temperature data display area, conductivity data display area and flow velocity and flow direction data display area.The utility model is in view of the deficiency of prior art, develop a kind of underground water multi-parameter intelligent monitoring device, the utility model realizes temperature, flow velocity and flow direction and conductivity etc. monitoring.

This invention discloses a control method for a bridgeless direct-drive digital hot-wire anemometer, relating to the field of fluid measurement technology. The method employs a digital direct-drive closed-loop measurement circuit consisting of a main control unit, a power drive unit, a synchronous acquisition unit, and a hot-wire probe. By synchronously acquiring the voltage at both ends of the hot-wire probe and the voltage on the current sensing element, the real-time resistance and loop current of the hot-wire probe are accurately calculated. The main control unit dynamically sets the target working resistance based on the real-time ambient temperature and a preset superheat ratio, and adjusts the drive signal in real-time based on a digital PID control algorithm, enabling the hot-wire probe resistance to be quickly and accurately locked at the target value. Finally, based on steady-state data and the heat balance equation, the fluid velocity is deduced. This fundamentally eliminates the zero-point temperature drift and parasitic resistance of long wires inherent in traditional bridge circuits, achieving software-based setting of the superheat ratio and flexible optimization of control parameters, thus improving measurement accuracy, environmental adaptability, and the safety of the hot-wire probe.

The present application belongs to the technical field of measurement, and particularly relates to a mine-used wind speed measurement system and a working method thereof, wherein the mine-used wind speed measurement system adjusts the temperature of a first thermocouple in a temperature measurement mechanism through a temperature adjusting mechanism controlled by a control module according to the ambient temperature, so as to improve the response speed of the temperature measurement mechanism when detecting the temperature, and further realize the adjustment of the temperature difference between the first thermocouple and a second thermocouple according to the ambient temperature, so as to improve the response speed of the temperature measurement mechanism when detecting the temperature and improve the detection accuracy of the wind speed.

The invention relates to a pump arrangement (10) for a channel system (1) which has at least one channel (3) for guiding a medium (5), with at least one inner channel (12) and an evaluation and control unit (14), wherein at least one MHD module (20) is arranged in the at least one inner channel (12), wherein one MHD module (20) is designed as a pump module (20A), wherein the evaluation and control unit (14) controls the pump module (20A), wherein an electrode device (22) of the pump module (20A) conducts a current provided by the evaluation and control unit (14) within the corresponding inner channel (12) through the medium (5), so that, in conjunction with a magnetic field generated by a magnetic device (24), a Lorentz force is created which draws a portion of the medium (5) through an inlet opening (12).1) of the corresponding inner channel (12), is drawn in, is selectively accelerated within the corresponding inner channel (12) and is expelled again via an outlet opening (12.2), so that a resulting pressure difference between a channel section (3A) in the area of ​​the inlet opening (12.1) of the at least one inner channel (12) and a channel section (3B) in the area of ​​the outlet opening (12.2) of the at least one inner channel (12) generates a volume flow of the medium (5) in the channel (3) outside the at least one inner channel (12), as well as a temperature control arrangement with such a pump arrangement (10).

The invention relates to a microfluidic cartridge (20) for detecting analytes in an analysis sample, comprising a cartridge body (22) which has a fluid interface (30) for connecting to a sample container (10). The cartridge body is equipped with: - a fluid reservoir (32) for a sample receiving liquid (52), a main fluid channel (34) which connects the fluid reservoir to the fluid interface, and a pump device (36) for bidirectionally pumping fluid between the fluid reservoir (32) and the fluid interface (30) through the main fluid channel (34), - an activatable closure (38) for the main fluid channel (34), said closure being arranged between the fluid reservoir (32) and the fluid interface (30), - an auxiliary fluid channel (40) which branches off from the main fluid channel (34) at a branch-off point (42) arranged between the activatable closure (38) and the fluid reservoir (32), - a detection chamber (44) for detecting the analyte by means of a biochip (54), comprising a fluid inlet and a fluid outlet, wherein the auxiliary fluid channel (40) connects the branch-off point (42) of the main fluid channel to the fluid inlet of the detection chamber (44), - a reaction chamber (46) for amplifying the analyte to be detected in the analysis sample, comprising a fluid inlet and a fluid outlet, said fluid outlet of the detection chamber (44) being connected to the fluid inlet of the reaction chamber (46), and - a blind-alley pressure chamber (48) with only one fluid inlet which is connected to the fluid outlet of the reaction chamber (46).

To provide a method for efficiently producing an open microchannel device with an externally accessible microchannel that links supply and discharge ports.SOLUTION: A method for producing an open microchannel device includes: a joining step of joining a board to a hydrophobic resin substrate provided with an open microchannel groove whose top face is opened, so as to cover the opened face of the open microchannel groove; a hydrophilization step, followed by the joining step, of making the inside of the open microchannel groove hydrophilic; and a peeling step, followed by the hydrophilization step, of peeling the plate.SELECTED DRAWING: Figure 2