656results about "Volume/mass flow by thermal effects" patented technology

The invention provides a flexible palladium film hydrogen sensor and a preparation method thereof, the flexible palladium film hydrogen sensor is sequentially provided with a flexible substrate, a hydrogen sensitive sensing layer and a contact connection layer from bottom to top, and the contact connection layer is connected with a resistance measurement unit; and the hydrogen-sensitive sensing layer is a palladium or palladium alloy film with a conical micro-nano structure. The palladium or palladium alloy thin film with the conical micro-nano structure provides a hydrogen sensor conical surface micro-nano structure with a high specific surface area for the flexible palladium thin film hydrogen sensor, and the process that hydrogen is adsorbed, dissolved and diffused into the palladium or palladium alloy thin film is accelerated, so that the response speed of the sensor is increased; according to the hydrogen sensor, the flexible substrate is adopted, so that the hydrogen sensor can be conveniently arranged in various narrow spaces, and the applicability of the hydrogen sensor in various scenes is improved.

A system performs a method for characterizing passage of a patient fluid through a conduit. The method includes quantifying flow of fluidic content through a conduit, where the fluidic content includes a patient fluid, estimating a concentration of a fluid component of the patient fluid in the fluidic content, and characterizing passage of the patient fluid loss through the conduit based on the quantified flow and the concentration of the fluid component. At least one of the quantified flow or the concentration of the fluid component is based on sensor data from a sensor arrangement coupled to the conduit. Other apparatus and methods are also described.

The invention relates to an asymmetric multichannel thermal flow sensor for integrated component detection and a signal processing method, and belongs to the technical field of sensors. The problems that a traditional symmetrical single-channel thermal flow sensor is limited in measuring range, saturated in output, insufficient in measuring precision and single in measuring flow are solved. The sensor comprises a flow inlet cavity, a flow outlet cavity and a measuring pipeline composed of five parallel circular pipelines, the middle pipeline is a component measuring pipeline, and the four pipelines on the periphery are flow measuring pipelines. A probe is arranged in the middle of the component measuring pipeline, a heating resistance wire is arranged in the middle of the flow measuring pipeline, and temperature measuring resistance wires are asymmetrically distributed on two sides. The pipeline is made of aluminum, and fillets are arranged at the joints to optimize fluid flow. The heating resistance wire is a nickel chrome wire, the temperature measuring resistance wire is a platinum wire, the component measuring probe is made of a platinum film, and the surfaces of the platinum film and the platinum film are insulated. An improved Wheatstone bridge circuit is adopted for signal collection, and precision and protectiveness are improved.

The invention provides a liquid drop continuous generation device which comprises a first flow channel and a second flow channel, the first flow channel and the second flow channel comprise first positions which are tightly attached to each other, and each first position comprises a through hole communicating with the first flow channel and the second flow channel; the first flow channel and the second flow channel are used for introducing a first liquid and a second liquid respectively; the special ultrasonic device can act on the first liquid in the first flow channel, when the special ultrasonic device is driven in a first power period, an acoustic beam current facing the through hole is generated in the first liquid, the acoustic beam current enters the second liquid through the through hole, and liquid drops formed by the first liquid are formed in the second liquid. The invention also correspondingly provides a method for continuously generating liquid drops. The liquid drop generation mode is more flexible, the controllability is higher, and the cost is lower.

A microelectronic socket structure and a method of forming the same. The socket structure comprises: a socket structure housing defining a cavity therein; and an interconnection structure including: a contact element disposed at least in part within the cavity, and configured to be electrically coupled to a corresponding microelectronic package, the contact element corresponding to one of a signal contact element or a ground contact element; and a conductive structure disposed at least in part within the cavity, electrically coupled to the contact element, and having an outer contour that is non-conformal with respect to an outer contour of the contact element.

The invention relates to the technical field of measurement, in particular to the technical field of monitoring the state of invisible fluid by measuring and estimating the flow of the fluid through pulsed light signals, and particularly discloses a hydropower station gallery grouting state monitoring method based on pulsed light signal measurement. The method comprises the steps of grouting hole background parameter collection, real-time grouting process parameter collection, data processing and abnormal feature extraction, the grouting state is judged according to a matching result, and feedback decisions of grouting system maintenance, pressurization, pressure reduction, intermittent grouting or stop of replacement of new grout are given. The method can objectively and directly confirm that the target fracture and the stratum are filled with the grout, a non-tampering original data chain is provided for grouting quality evaluation, and the long-term safety and reliability of hidden projects such as hydropower station dams and dam foundations are greatly improved.

A method for producing a nanochannel (200) is described with the following steps a) depositing a nanochannel sacrificial layer (3) using an ALD process on a substrate (1), which defines the subsequent channel height at least at one point b) depositing a first covering layer (4) on the nanochannel sacrificial layer (3) c) At least partially structuring and / or etching the nanochannel sacrificial layer (3) and the first cover layer (4) so ​​that a first exposed region (10) is formed d) At least partial etching of the now exposed nanochannel sacrificial layer (3) with an etching rate < 100nm / min, preferably <10nm / min, and particularly preferably <5nm / min and even more preferably <2nm / min, so that an under-etched second exposed region (20) is formed which defines the channel width e) depositing a second cover layer (5) onto the first cover layer (4) and the first exposed region (10) so that the second exposed region (20) is sealed and forms a nanochannel (200).

The invention discloses a three-dimensional implantable flexible microprobe array substrate with an adjustable and controllable magnetic field and a preparation method of the three-dimensional implantable flexible microprobe array substrate. The preparation method comprises the following steps: sequentially preparing the sacrificial layer and the first flexible material layer on the supporting substrate from bottom to top; growing a magnetic material intermediate layer on the first flexible material layer; preparing a second flexible material layer on the magnetic material intermediate layer; the first flexible material layer and the second flexible material layer are etched through the photoetching technology to achieve hollowing of the microprobe area and thinning of the rotating hinge; and removing the sacrificial layer to release the whole microprobe array substrate, pulling the microprobe array to rotate through a magnetic field to complete the process of converting the microprobe array into the two-dimensional microprobe array into the three-dimensional microprobe array, and curing the hinge through resin to obtain the three-dimensional microprobe array. According to the invention, the performance and reliability of the probe array under the dynamic condition are obviously improved; according to the invention, the microprobe array can capture the change of a three-dimensional signal, provides a high-spatial-resolution monitoring capability, and is suitable for high-precision applications such as real-time neural activity monitoring and the like.

The invention provides a microneedle mold manufacturing method, a microneedle manufacturing method, a microneedle mold and a microneedle, relates to the technical field of microneedles, and can improve the manufacturing efficiency of the microneedle mold. The method comprises the following steps: providing a glass substrate, wherein the surface of the glass substrate is provided with at least one target area; a laser beam is used for modifying the target area in the thickness direction of the glass substrate, so that an inverted-cone-shaped modified area is formed on the glass substrate; the modified area is subjected to etching treatment through etching liquid to form an inverted-cone-shaped hole, the microneedle mold is obtained, and the microneedle mold is used for manufacturing a microneedle.

The present invention discloses a two-dimensional MXene functionalized In x Ga 1‑x N nanorods and their preparation methods and applications. x Ga 1‑x The N nanocolumn includes a substrate, a MXene layer on the substrate, and an In x Ga 1‑x N nanorods; wherein 0≤x≤1. The present invention uses two-dimensional MXene as a substrate and In x Ga 1‑x The functional layer between the N nanopillars not only broadens the choice of substrates and reduces costs, but also effectively reduces the interface impedance between the substrate and the nanopillars, which is conducive to enhancing the carrier transport performance and greatly improving the photoelectric performance of the nanopillars. At the same time, it avoids the disadvantage that the nanopillars are easily etched on the substrate and improves their photoelectric stability. x Ga 1‑x N nanorods have important application prospects in photoelectrolytic water splitting to produce hydrogen, photodetectors, and solar cells.

The invention relates to a method for producing at least one micromirror element (200) as it can be used in micro-electro-mechanical systems (100), in particular for use in semiconductor technology equipment (1), and to a micro-electro-mechanical system (100) comprising corresponding micromirror elements (200). The process includes the following steps: - Providing a flat, two-sided mirror substrate (210); - Incorporating a predetermined shape at least on the side (215) of the provided mirror substrate (210) intended to be reflective; and - Applying a reflective coating (220) at least to the side (215) of the provided mirror substrate (210) intended to be reflective.

The present disclosure is drawn to inertial pumps. An inertial pump can include a microfluidic channel, a fluid actuator located in the microfluidic channel, and a check valve located in the microfluidic channel. The check valve can include a moveable valve element, a narrowed channel segment located upstream of the moveable valve element, and a blocking element formed in the microfluidic channel downstream of the moveable valve element. The narrowed channel segment can have a width less than a width of the moveable valve element so that the moveable valve element can block fluid flow through the check valve when the moveable valve element is positioned in the narrowed channel segment. The blocking element can be configured such that the blocking element constrains the moveable valve element within the check valve while also allowing fluid flow when the moveable valve element is positioned against the blocking element.

The invention provides a packaging front plate, a preparation method thereof and a photovoltaic module. The packaging front plate comprises a body which is of a transparent structure; the radiation cooling layer is arranged on the surface of one side of the body, the radiation cooling layer has light transmittance, and the face, away from the body, of the radiation cooling layer is provided with a lotus leaf surface imitating micro-nano structure. The radiation cooling layer can radiate heat to the external space, so that the working temperature of the photovoltaic module is effectively reduced, the photoelectric conversion efficiency can be improved, the photovoltaic module can be prevented from running at a high temperature, and the service life of the photovoltaic module can be prolonged; furthermore, a micro-nano structure imitating the lotus leaf surface is designed on the radiation cooling layer, attachment of water drops or dirt on the surface of the radiation cooling layer can be reduced, and therefore the surface of the radiation cooling layer is kept clean and dry, the problem that the power generation efficiency is reduced due to pollution can be avoided, the cleaning frequency can be reduced, and the power generation efficiency is improved. And therefore, the maintenance cost can be reduced.

In accordance with the present disclosure, an example non-transitory computer readable medium may store instructions that when executed cause a computing device to dispense, using a first fluid ejector of a microfluidic device, a biologic sample to a region of a substrate, dispense, using a second fluid ejector of the microfluidic device, a reagent to the region of the substrate, and dispense, using a third fluid ejector of the microfluidic device, a metabolic indicator to the region of the substrate, wherein the metabolic indicator provides a visual indication in response to reaction with the biologic sample.

In order to increase the efficiency with which an analysis using an enhanced electric field based on a microstructure is made, an embodiment of the present disclosure provides a plate-shaped sample liquid concentration device (10) that is to be used being placed over a microstructure substrate which has disposed on the surface thereof a microstructure capable of generating an enhanced electric field with respect to incident light. The sample liquid concentration device includes a first surface and a second surface that defines a thickness together with the first surface, and has formed therein a plurality of passage parts connecting the first surface and the second surface. The passage parts each have a first opening and a second opening formed respectively in the first surface and the second surface and are each defined by an inner surface connecting the first opening and the second opening. With the first surface disposed in proximity to the surface of the microstructure substrate, the first opening can be positioned corresponding to the position of the microstructure. The second opening can receive a sample liquid that contains a detection target object.

An ultrasonic fluid meter includes an ultrasonic measuring device, a valve comprising a movable member, a position sensor configured to measure the current position of the movable member, a pressure sensor arranged to measure the pressure of the fluid in the conduit; and a processing circuit arranged, if the current position of the movable member is such that the current flow rate cannot be measured by the ultrasonic measurement device, to evaluate the current flow rate as a function of the current position of the movable member, of the pressure of the fluid to the current flow rate, and of the pressure of the fluid at zero flow rate.

A microfluidic valve comprising an adhesive tape, an outlet disposed at one end of a first microfluidic channel, an inlet disposed at one end of a second microfluidic channel, wherein the inlet and the outlet are disposed in a proximity to each other, wherein the adhesive tape covers both the outlet and the inlet. A method of operating the microfluidic valve is also disclosed.

The invention relates to a portable measuring apparatus (100) for measuring at least one sap flow in a plant, said plant having an external envelope, said apparatus (100) comprising: - a microwave transmitter (10) for emitting a microwave electromagnetic flow towards a first part of the external envelope of said plant so as to heat an internal portion of said plant; - a thermal sensor (20) arranged to capture thermal radiation from said plant over time, - a processing unit (30) configured to determine, from the thermal radiation captured by the thermal sensor, a displacement of the heat front over time in said plant and to estimate, on the basis of the displacement of the heat front, the sap flow Figure for the abstract: Fig. 2

The present invention discloses a microfluidic bio-interconnected neural network chip and a preparation method thereof. The chip consists of a microelectrode array, a microfluidic structure, and a cell culture ring structure. The microelectrode array can detect and stimulate the activity of neurons; the microfluidic structure limits the growth direction of axons between cell culture partitions by setting cell culture partitions, microfluidic channel dimensions, microfluidic channel shapes, and fillet distribution, thereby achieving controllable low-power transmission of neuronal electrical information; the cell culture ring structure provides nutrients for cells in the cell culture chamber. The present invention provides a method for manufacturing a microfluidic bio-interconnected neural network chip, using fully exposed positive photoresist as a sacrificial layer for microfluidic structure peeling, thereby solving the problem of difficult demolding of thin-film microfluidic structures. The chip can be used to explore the response characteristics of neuronal networks to external stimuli, study the internal information transmission mode of neuronal networks, and other fields.

In a general aspect, methods for manufacturing vapor cells are disclosed. In certain aspects, a method of manufacturing a vapor cell includes obtaining a dielectric body that has interior and exterior surfaces. The interior surface defines a cavity in the dielectric body, and the exterior surface defines an opening to the cavity. The method includes forming an antirelaxation coating on the interior surface of the dielectric body. The antirelaxation coating comprising an organosilane material. The method additionally includes disposing a vapor or a source of vapor in the cavity and obtaining an optical window that comprises a surface. The vapor or the source of vapor includes alkali metal atoms. The method also includes bonding the surface of the optical window to the exterior surface of the dielectric body to form a seal around the opening to the cavity.

Methods and systems for sensing headspace vial presence are described herein. In one embodiment, a system can include a sample probe, a fluid source in fluid communication with the sample probe, one or more of a pressure sensor and a flow sensor in fluid communication with the sample probe, and a processor configured to: (a) receive a first set of signals from the one or more of the pressure and flow sensors, execute an ejection procedure to remove a sample vial from the sample probe, receive a second set of signals from the one or more of the pressure sensor and the flow sensor during step (b), (d) detect whether the ejection procedure is successful from the first set of signals and the second set of signals, and (e) in response to the detecting, initiate one or more actions selected from the group consisting of: a remediation and an alert.

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 method of forming a nanopore in a lipid bilayer is disclosed. A nanopore forming solution is deposited over a lipid bilayer. The nanopore forming solution has a concentration level and a corresponding activity level of pore molecules such that nanopores are substantially not formed un-stimulated in the lipid bilayer. Formation of a nanopore in the lipid bilayer is initiated by applying an agitation stimulus level to the lipid bilayer. In some embodiments, the concentration level and the corresponding activity level of pore molecules are at levels such that less than 30 percent of a plurality of available lipid bilayers have nanopores formed un-stimulated therein.

A method for analysing a device for spraying a pharmaceutical fluid product, comprising the following steps: - providing a spray head (1) of a device for spraying a pharmaceutical fluid product, the spray head (1) comprising a spray orifice (2), - providing a receiving surface (10) comprising a plurality of sensors (20), - passing a flow of compressed gas (F) through the spray orifice (2) of the spray head (1), - sending the flow of compressed gas (F) onto the receiving surface (10), - visualizing the impact zone of the flow of compressed gas (F) on the receiving surface (10) by means of the sensors (20), and - analysing the visualization of the impact zone to determine whether the impact zone is compliant or non-compliant with predetermined specifications, the receiving surface (10) being at least partially spherical in shape.

The problem to be solved by the present invention is to obtain an internal combustion engine control device capable of appropriately correcting an output value of a flow rate sensor provided in an intake flow path of the internal combustion engine and reducing an error between a corrected air flow rate and an actual air flow rate. A control device (100) for an internal combustion engine (10) of the present invention includes a CPU (103) that computes an intake air amount of the internal combustion engine based on a sensor signal of an air flow sensor (12) provided in an intake passage (15), computes a pulsation rate from a pulsation amplitude and an average air amount of the intake air amount, and calculates a correction value for correcting a pulsation error of the intake air amount using the pulsation rate and an engine rotation speed of the internal combustion engine. A computation device includes an engine pulsation correction map (131), a blow-by pulsation correction map (132), and a criteria determination unit (133) that selects and uses one of these two correction maps for calculation of the correction value based on a parameter for determining an operation area of the internal combustion engine.

The invention relates to a flow sensor comprising:-a housing (100), the housing (100) having an inlet channel (110) for receiving a fluid measurement medium, an outlet channel (120) for discharging the fluid measurement medium, a measurement channel (130) extending between the inlet channel (110) and the outlet channel (120), and a flow sensor (130) extending between the inlet channel (110) and the outlet channel (120), and more particularly at least one auxiliary channel (140) extending parallel to the measuring channel (130); -a sensor element (200) arranged in the measurement channel (130) for sensing a physical measurement variable relating to a flow rate of the fluid measurement medium; and-a first, in particular bolt-shaped, closure element (300) wherein the first closure element (300) is designed and attached to the housing (100) such that the first closure element (300) can be moved relative to the first fluid transport element (150) or the second fluid transport element (160) into at least one first position (P1) and one second position (P2), the first closure element (300) closes the first fluid transport element (150) or the second fluid transport element (160) in the second position (P2), and wherein the first fluid transport element (150) or the second fluid transport element (160) is not closed in the first position (P1) of the first closure element (300). The invention also relates to a system comprising a flow sensor according to the invention.

Method for determining a fluidic parameter (V_dot, n_dot) in an anode path (10) of a fuel cell system (100), in particular a solid oxide fuel cell system (100), comprising the fuel cell system (100), - an anode path (10) with an anode path inlet (11), wherein the anode path inlet (11) is arranged for feeding a fuel gas into the anode path (10), - an anode (16) having an anode input (15) and an anode output (17), wherein the anode input (15) is connected to the anode path input (11), - a lambda sensor (50) which is arranged in the anode path (10) and is arranged to measure a lambda value (λ) in the anode path (10), comprising the method, - measuring (110), by the lambda sensor (50) in the anode path (10), a current (I_mess) or a voltage (U_mess) which is specific for a lambda value (λ) in the anode path (10), - Calculating (130), in particular by a control unit (FCCU), a flow parameter (V_dot, n_dot) of the fuel gas in the anode path (10) as a function of the current (I_mess) or the voltage (U_mess).

A microfluidic device and a preparation method therefor, and a microfluidic system. The preparation method comprises: S1, providing a mold having a groove; S2, injecting a liquid metal into the groove, and solidifying the liquid metal to obtain a solid metal; S3, separating the solid metal from the mold, and providing an electrode on the solid metal; S4, forming a coating layer on a surface of the solid metal having the electrode, so that the solid metal is wrapped in the coating layer, and the electrode at least partially protruding out of the coating layer, so as to obtain a prefabricated device; and S5, placing the prefabricated device in a substrate, melting the solid metal and making the electrode at least partially protrude out of the substrate, so as to obtain a microfluidic device (a). The preparation method is simple, the packaging has good performance, the device is highly integrated and is easy for industrialization, the microfluidic device obtained by means of this preparation method is good in molding, excellent in performance, can be widely used, and can be integrated with a power supply, a signal transmitter and a signal receiver to form a microfluidic system.