391results about "Fluid pressure measurement using elastically-deformable gauges" patented technology

The invention provides a detection device for internal pressure change of a battery cell, the battery cell comprises an explosion-proof valve or an explosion-proof sheet, and the explosion-proof valve or the explosion-proof sheet is arranged on a shell of the battery cell. When the internal pressure of the battery cell changes, the explosion-proof valve or the explosion-proof sheet deforms at first until the battery cell is broken due to overlarge internal pressure, and the detection device comprises an electrode sheet which is a multi-section type electrode sheet comprising a plurality of electrode sections, each electrode section is physically separated and is arranged above or on the side of the explosion-proof valve or the explosion-proof sheet, each electrode section and the explosion-proof valve or the explosion-proof sheet form an inductive capacitor, and deformation of different positions of the explosion-proof valve or the explosion-proof sheet is detected based on capacitance change; and the chip is a multi-channel chip, each channel is connected with each electrode section through a connecting line in a one-to-one correspondence manner, and the chip is also connected to an anti-explosion valve or an anti-explosion sheet through a connecting line. The invention also provides a battery core internal pressure early warning system.

The invention discloses an osmometer for safety monitoring of a reservoir dam, which relates to the technical field of safety monitoring, and comprises an outer shell for providing a protection effect, a water seepage hole arranged at the end part of the outer shell, a diaphragm for detecting and judging water pressure, and an electromagnetic coil for detecting the vibration frequency of a steel wire connected with the diaphragm, and the tension adjusting mechanism is used for detecting and adjusting the tension of the steel string in real time so as to ensure the detection accuracy. According to the scheme, the tension adjusting mechanism is additionally arranged at the tail end of the steel string, the tension of the steel string can be detected in real time, when the tension of the steel string is externally influenced or changes, the tension of the steel string can be adjusted in real time, the stability of the steel string in the later use process is guaranteed, and the service life of the steel string is prolonged. Secondly, in consideration of the basic principle when the steel string is used for detection, fixation and movement of the tail end need to be considered, real-time adjustment and fixation of the steel string are synchronously guaranteed according to actual requirements, and therefore it is guaranteed that the steel string can work correctly.

The utility model relates to a pressure gauge, in particular to an anti-impact pointer pressure gauge. Comprising a pressure gauge body, a pointer is arranged on a movement shaft in the pressure gauge body, the pointer comprises a pointer body, a spring and a pointer tip, a mounting hole is formed in the middle of the pointer body, the pointer body is arranged on the movement shaft through the mounting hole, the spring is arranged between the pointer body and the pointer tip, and the pointer tip is arranged in the mounting hole. The two ends of the spring are fixedly connected with the needle tip and the needle body respectively. According to the anti-impact pointer pressure gauge designed in the scheme, when the pressure of a working medium is sharply reduced or increased and the point of the pointer impacts the stop pin on the dial, the spring deforms and unloads, and the pointer can be effectively prevented from deforming, being damaged and falling off. The pressure gauge does not need to be filled with damping liquid, so that the cost of the pressure gauge is greatly reduced, and the problem of environmental pollution caused by leakage of the damping liquid of the pressure gauge is solved.

The invention provides a pressure control method and system based on temperature identification, and the method comprises the following steps: obtaining the environment temperature of a space where each air bag is located, detecting the surface of each air bag, obtaining the surface temperature of each air bag, and generating a temperature distribution diagram based on the environment temperature and the surface temperature of each air bag; according to the temperature distribution diagram, determining a pressure adjustment area and pressure adjustment data of the pressure adjustment area; the invention discloses a pressure control method based on temperature identification, and the method can timely identify a potential pressure concentration area through monitoring the skin temperature change in real time, achieves the early warning, remarkably improves the timeliness and accuracy of pressure injury prevention, and effectively reduces the risk of pressure injury caused by human negligence. Precise decompression of a specific area can be achieved, the precise decompression mechanism helps to avoid the problem of excessive decompression or insufficient decompression, comfort of a patient in the decompression process is ensured, and meanwhile pressure injury is effectively prevented.

The invention relates to the field of pressure sensors, in particular to a triboelectric pressure sensor and a sleep monitoring method and system. The triboelectric pressure sensor comprises a positive friction layer, a negative friction layer, a deformation electrode connected to the negative friction layer and a flexible electrode connected to the positive friction layer. The contact ends of the tips of the multiple micro-cone structures of the positive friction layer all face the negative friction layer, and gaps are formed between the contact ends and the negative friction layer. The Young modulus of the negative friction layer is smaller than that of the micro-cone structure, so that when the negative friction layer approaches the deformed electrode, the negative friction layer sinks and makes contact with the side face of the micro-cone structure. The change amplitude of the contact surface along with the pressure is large, so that the sensitivity of the sensor is improved. Respiration and pulse frequencies are respectively detected by a triboelectric pressure sensor to obtain electric signals, the electric signals are segmented and enhanced into waves, then the waves are classified by a big data method, a learning model for identifying sleep state categories corresponding to the waves is obtained, the categories are further rapidly and accurately identified, and an alarm is given according to the number of abnormal times. The method and the system have high reliability.

The invention relates to the technical field of bourdon tube production, and discloses bourdon tube pressure rapid detection equipment which comprises a base, an inflation structure arranged on the base, a mounting structure arranged on the base and a size detection structure arranged on the base, the mounting structure comprises a placement seat and a locking assembly, the placement seat is arranged on the base, and the locking assembly is arranged on the placement seat. A first placing block and a second placing block are arranged on the placing seat, a first placing groove is formed in the first placing block, and a second placing groove is formed in the second placing block. And finally, the pipe end displacement before and after inflation of the bourdon pipe is measured through a size detection structure, and the due pipe end displacement of the bourdon pipe is calculated through a formula, so that a worker can know whether the bourdon pipe is qualified or not by comparing the two pieces of data.

The invention provides a corrugated pressure diaphragm and a manufacturing method thereof.The corrugated pressure diaphragm is formed by a flat plate in a hydraulic mode, stainless steel or elastic alloy can be selected as a material, and the manufacturing method comprises the steps of solid solution heat treatment, cleaning and drying, blanking, cleaning and drying, forming, cleaning and drying, outer circle turning, cleaning and drying, quenching, cleaning and drying, tempering and cleaning and drying. And detecting hardness and grain size. The invention provides a sensitive element which is small in size and resistant to vibration, and meanwhile provides a specific manufacturing method of the sensitive element.

In some embodiments, a pressure sensor may comprise a housing, a flexible membrane which, together with the housing, forms a hermetically closed cavity, a sensor element arranged in the hermetically closed cavity, and a gaseous medium in the hermetically closed cavity. The sensor may detect a change in a physical property, of the flexible membrane, associated with an external pressure pressing inward into the flexible membrane of the hermetically closed cavity.

The invention provides a resonant pressure sensor with adjustable measuring range and sensitivity, and relates to the technical field of sensors, and the resonant pressure sensor comprises a pressure sensitive film which is used for detecting external pressure; the resonator layer comprises a double-end clamped resonant beam, the double-end clamped resonant beam is arranged above the pressure sensitive film, a movable part of the double-end clamped resonant beam is suspended, one side of the double-end clamped resonant beam is provided with two driving electrodes for applying an alternating current driving signal and a parameter pumping alternating current signal respectively, and the other side of the double-end clamped resonant beam is provided with two detection electrodes; the silicon sealing cover layer is provided with a resonant cavity, and the resonant cavity is located above the pressure sensitive film and the double-end clamped resonant beam and used for providing a deformation space for the pressure sensitive film and providing a vibration space for the double-end clamped resonant beam; in the first working mode, the first-order mode of the resonant beam is split into two amplitude peak values by applying a parameter pumping alternating current signal, and the sensitivity of the output amplitude ratio is adjusted by adjusting the amplitude of the parameter pumping alternating current signal; the measurement range is adjusted by adjusting the frequency of the parameter pumping alternating current signal.

The invention relates to the technical field of micro-electro-mechanical system sensors, in particular to an MEMS pressure sensor which comprises a shell, an induction diaphragm and an ASIC signal processing unit, an induction mounting cavity and a signal processing cavity are formed in the shell, an air inlet is formed in the lower end face of the shell, a detection channel and a buffer cavity are formed in the shell, and the detection channel is communicated with the signal processing cavity. The buffer cavity is designed to be gradually expanded from bottom to top; pulse airflow firstly enters the detection channel through the air inlet, and direct disordered impact of the airflow is avoided; then the airflow enters the buffer cavity, the airflow speed and the pressure peak value are gradually reduced and the pulse energy is dispersed by utilizing the characteristic that the cross sectional area of the cavity is gradually increased, and the originally concentrated strong impact force is converted into gentle pressure transmission, so that the abrasion and damage risks caused by the fact that the sensing diaphragm frequently bears the violent pressure are reduced; the structure stability and the sensing sensitivity of the sensing diaphragm can be maintained, and the accuracy of pressure detection and the reliability of long-term work of the MEMS pressure sensor can be guaranteed.

The invention relates to the technical field of fluid pressure sensing, in particular to a triboelectric hemispherical composite film pressure sensing device and a control method thereof, and the device comprises a shell, a top gland and a sensing unit located in the shell. The sensing unit comprises an insulating cover plate, a composite film, an insulating ring cover, a transmission buffer block, an annular end cover and a hemispherical composite film from bottom to top. The composite film directly contacts with hydraulic oil, deforms under pressure and acts with the copper foil on the lower side of the transmission buffer block to generate a first electric signal; when the pressure is increased, the transmission buffer block is pushed to move upwards, so that the spherical copper foil on the upper side acts with the hemispherical composite film to generate a second electric signal. Self power supply is realized by utilizing a friction nanometer power generation principle, wide-range monitoring is realized through a double-layer sensing structure, and the sensor has the advantages of high sensitivity, good sealing performance, adaptability to complex hydraulic working conditions and the like in cooperation with a spherical surface contact design and a multi-sealing structure.

The invention provides a parallel type gas density relay which is used for monitoring the pressure of gas to be measured, one end of a measuring corrugated pipe is open and communicated with the gas to be measured so that the gas to be measured can flow into a measuring cavity, the measuring corrugated pipe and a compensation corrugated pipe are connected in a staggered mode, pneumatic modules are connected in parallel, and pressure-bearing modules are connected in parallel. The pneumatic module and the pressure-bearing module are connected in parallel, and when the pressure range of monitored to-be-detected gas is large, shells of all compensation corrugated pipes and shells of all second pressure-bearing corrugated pipes share pressure together, so that all the compensation corrugated pipes and all the second pressure-bearing corrugated pipes deform within the effective stroke; when the compensation air pressure is large, the shells of all the measuring corrugated pipes and all the first pressure-bearing corrugated pipes share pressure together, so that all the measuring corrugated pipes and all the first pressure-bearing corrugated pipes deform within the effective stroke, the measuring range of the parallel type gas density relay can be expanded, and the requirement for measuring the gas pressure in a larger range is met.

A transducer for determining a pressure of a hydrogen-containing fluid medium confined in a first space includes a pressure side end configured to be disposed facing the fluid medium. The transducer includes a housing, which defines a second space, and a measuring arrangement disposed in the second space. The pressure side end includes a diaphragm configured and disposed for hermetically separating the first space from the second space. The diaphragm includes a metallic material that is made of a high-alloy martensite.

This invention relates to a fluid sealing device comprising a sealing member comprising a first surface and an opposite second surface. A first region of the first surface for forming a first seal about an aperture of a process component containing a fluid, and an inner region of the first surface to be exposed to the fluid via the process component aperture. A restraining member providing a support surface facing the second surface, a perimeter portion of the restraining member interfacing with a first region of the second surface, the first regions of the first and second surfaces corresponding with a first region of the sealing member. An inner region of the second surface spaced from the support surface to form a cavity between the inner region of the second surface and the supporting surface at least in an unpressurised condition. The inner regions of the first and second surfaces corresponding with an inner region of the sealing member, the inner region of the sealing member moveable towards and away from the support surface under action of a pressure of the fluid on the inner region of the first surface to provide an indication of the pressure.

The utility model relates to a ceramic substrate with an annular supporting structure and a capacitive pressure sensor, and belongs to the technical field of sensor electrodes. At least one of the problems of initial point drift, large non-linear error and precision reduction, poor measurement repeatability and the like caused by different thermal expansion coefficients of materials due to machining error accumulation of a capacitive vacuum gauge in the prior art is solved. The utility model discloses a ceramic base body with an annular supporting structure, the lower surface of the ceramic base body is provided with an annular supporting part, the annular supporting part extends downwards along the edge of the lower surface of the ceramic base body, and the supporting part is provided with an air guide notch. According to the ceramic substrate and the capacitive pressure sensor provided by the invention, a unique annular supporting structure and an integral forming technology are adopted, so that the phenomena of machining error accumulation and mechanical lag caused by expansion coefficient difference of parts made of different materials are avoided, the measurement precision and the measurement repeatability are remarkably improved, and the ceramic substrate and the capacitive pressure sensor are simple in preparation process and low in cost. The method is suitable for large-scale popularization.

Gas pressure measuring device (100) for measuring a pressure (P, P1) of a process gas (304) at a work location (306) of a device (300) for particle beam-induced processing of a photomask (302) for microlithography, comprising: a chamber (102) with an opening (104) on a first side (118) for receiving the process gas (304) and a pressure diaphragm (122) on a second side (124), and a sensor unit (134) for detecting a deflection (A) of the pressure diaphragm (122) for determining a pressure (P1) of the process gas (304) in the chamber (102) as a pressure (P) of the process gas (304) at the workplace (306), wherein the gas pressure measuring device (100) is arranged for placement in the device (300) such that its opening (104) is located at the working location (306) of the device (300).

A pressure measurement system includes a pressure pod with two chambers separated by a diaphragm such that a deformation / movement of the diaphragm is indicative of a difference between the pressures of the two chambers. Such deformation / movement is detected by a device that has no physical contact with the diaphragm, for example, by an optical detector that detects a change in the shape of the diaphragm or a movement of a protrusion on the diaphragm.

The present invention discloses a differential pressure transmitter, which includes a pressure inlet seat and a sealing cover. The sealing cover is arranged on the pressure inlet seat. A diaphragm pressure sensor is arranged inside the sealing cover. A lead outlet is arranged at the top of the sealing cover. The diaphragm pressure sensor is connected with a signal lead, and the signal lead passes outwards through the lead outlet. A lead connector is wrapped on the signal lead, and the lead connector plugs in the lead outlet and is sealed with it. A negative pressure oil injection hole is also arranged on the sealing cover, and an oil plug is arranged in the negative pressure oil injection hole. When using the differential pressure transmitter of the present invention, when the internal pressure of the diaphragm pressure sensor is too high and it has a tendency to separate outwards, and the liquid pressure transmission medium in the installation cavity is not easily compressed, it can, to a certain extent, prevent the tendency of the diaphragm pressure sensor to separate, and adopts a suspension installation method, avoiding the abutment of the isolation diaphragm and / or the welding ring against the assembly part, and the isolation diaphragm will not be deformed during the installation process, solving the influence of clamping stress on the measurement accuracy.

The invention relates to an improvement of a diaphragm pressure gauge verification mode, in particular to a diaphragm pressure gauge rapid verification device and a verification method, which can realize rapid clamping of a compatible sanitary diaphragm pressure gauge and a flange type diaphragm pressure gauge through pressing operation, and is assisted by corresponding pipeline and valve body design. The diaphragm pressure gauge calibration device comprises a base and supports, the supports are installed on the two sides of the base, lead screws are arranged on the lower portions of the supports, the diaphragm pressure gauge calibration device further comprises a first sliding block and a second sliding block, and the first sliding block is in threaded connection with the lead screws and is in sliding fit with the base; the sliding block II abuts against the sliding block I, the contact surface between the sliding block II and the sliding block I is wedge-shaped, the supporting plate is rotationally matched with the support, one end of the supporting plate is rotationally matched with the sliding block II, pressing blocks are arranged on the two sides of the other end of the supporting plate respectively, and the pressing blocks are located above the clamping part of the base. A plurality of concentric sealing rings are arranged on the clamping part, an air inlet is formed in the center of the clamping part, and an air inlet is formed in the clamping part.

The invention relates to a microelectromechanical sensor component (1) with a substrate (2) and / or a layer system (3), wherein the sensor component (1) has a cavity (4) and a sensor island (5) freely supported in the cavity (4), which is connected to the substrate (2) and / or to the layer system (3) by a connecting element (6a, 6b), wherein the connecting element (6a, 6b) is configured as an active connecting element (6a) for controlling and / or acquiring electromechanical properties of the sensor component (1), and / or wherein an active functional element (7) for controlling and / or acquiring electromechanical properties of the sensor component (1) is arranged between the sensor island (5) and the substrate (2) and / or the layer system (3). The invention further relates to a microelectromechanical pressure sensor and a microelectromechanical microphone.

The utility model relates to a pressure measuring diaphragm capsule protecting and cleaning device which comprises a top cover and a base, clamping grooves are formed in the bottom of the top cover at equal intervals, clamping strips are fixedly connected to the top of the base at equal intervals, the clamping strips are used in cooperation with the clamping grooves, and the base is located on the outer side of a measuring diaphragm capsule. The device has the beneficial effects that a disposable film can be quickly fixed above the measuring diaphragm capsule, the influence of the external environment on the measuring diaphragm capsule is reduced, and the risk that the measuring diaphragm capsule is damaged or the measuring precision is reduced due to factors such as accidental collision or dust is reduced.

The invention discloses a pressure gauge, and relates to the technical field of pressure detection. A joint assembly; the first end of the spring tube is communicated with the joint assembly; an elastic buffer mechanism, a transmission mechanism and a movement assembly; the movement assembly comprises pointers; the second end of the bourdon tube is connected to the first end of the elastic buffering mechanism, the second end of the elastic buffering mechanism is connected to the first end of the transmission mechanism, and the second end of the transmission mechanism is connected to the movement assembly, so that elastic deformation of the bourdon tube is transmitted to the movement assembly through the elastic buffering mechanism and the transmission mechanism in sequence, and the pointer rotates. In the scheme, the elastic buffer mechanism is additionally arranged between the bourdon tube and the transmission mechanism, and the elastic buffer mechanism can absorb expected accidental deformation impact displacement of the tail end of the bourdon tube caused by vibration of a working environment and pulsation impact of a measuring medium, so that jumping of the tail end of the pointer is greatly relieved, and pressure detection is more accurate.

To solve the problem caused by making a pressure sensor correspond to inert.SOLUTION: A pressure sensor includes: a sheet-like diaphragm 8 which is composed of a nonmetal material; a body block 4 which is composed of a nonmetal material, has a diaphragm opposite surface 10 facing a principal plane of the diaphragm and has the diaphragm opposite surface arranged to be covered with the diaphragm and is provided with a fluid inlet 14 and a fluid outlet 18 which are directed to the diaphragm side; and a sensor head 6 which has a recess 22 for storing pressure transmission liquid 24 and an opening of the recess arranged on an opposite side of the body block across the diaphragm so as to be closed by the diaphragm and is configured to detect pressure of fluid flowing between the diaphragm and the diaphragm opposite surface by deformation amount of the diaphragm. The fluid inlet and the fluid outlet are provided to be separated more from the diaphragm than the diaphragm opposite surface.SELECTED DRAWING: Figure 1

This invention belongs to the field of pressure sensors, specifically relating to an oil-filled core for a MEMS pressure sensor suitable for high-pressure, small-molecule media. It comprises a pressure ring, a corrugated diaphragm, a core base, sealing steel balls, and components such as silicone oil, a ceramic seat, a pressure chip, and leads located within a sealed cavity formed by the corrugated diaphragm and the core base. This invention addresses the shortcomings of traditional oil-filled cores for MEMS pressure sensors by improving the design in multiple structural and manufacturing aspects, solving problems such as small-molecule media infiltration, lead breakage failure, and high-pressure connection sealing. It is particularly suitable for accurate pressure measurement of high-pressure, small-molecule media.

A pressure sensor includes a first wafer having a primary deflectable diaphragm and a secondary deflectable diaphragm. The primary deflectable diaphragm has a first relationship between applied pressure and deflection, and the second deflectable diaphragm has a second relationship between applied pressure and deflection. The first and second relationships differ from one another. A second wafer is attached to the first wafer. At least one tensile strain gauge is coupled to the primary deflectable diaphragm and at least one compressive strain gauge coupled to the secondary deflectable diaphragm. An overpressure feature is mounted relative to one of the first wafer and the second wafer. The overpressure feature is configured to contact the other of the first wafer and second wafer during an overpressure condition that exceeds a maximum measurement pressure of the primary deflectable diaphragm and a maximum measurement pressure of the secondary deflectable diaphragm.

The invention provides a pressure detection method and device, a readable storage medium and cooking equipment. The pressure detection method is used for the cooking equipment, the cooking equipment comprises a cooking cavity, an elastic mechanism and a displacement sensor, the displacement amount of the elastic mechanism is related to the pressure in the cooking cavity, the displacement sensor is used for detecting the displacement amount, and the pressure detection method comprises the steps of obtaining displacement data, the displacement data comprises a first displacement amount output by the displacement sensor at a first moment and a second displacement amount output by the displacement sensor at a second moment; determining displacement change rates corresponding to the first displacement and the second displacement; determining a pressure state in the cooking cavity based on the displacement change rate; wherein the pressure state comprises a pressure state and a non-pressure state.

A production method for a flip-chip pressure sensor for back pressure, the flip-chip pressure sensor for back pressure comprising a main chip portion (1) and a cover plate portion (2), wherein a Wheatstone bridge (12) and a first electrical connection structure (13) are provided on a main body (11) of the main chip portion (1), the first electrical connection structure (13) being electrically connected to the Wheatstone bridge (12); and the cover plate portion (2) comprises a cover plate (21) and a second electrical connection structure (22), the cover plate (21) being bonded to the main body (11), and realizing electrical connection between the second electrical connection structure (22) and the first electrical connection structure (13). The second electrical connection structure (22) passes through the cover plate (21) and extends to the side surface of the cover plate (21) facing away from the main body (11), enabling direct soldering packaging of the second electrical connection structure (22) and an external substrate by means of SMT, and thereby facilitating packaging, improving the packaging efficiency and reliability of the flip-chip pressure sensor for back pressure.

The utility model relates to the technical field of pressure sensing, in particular to a sensor. A sensor comprises a core body and a shell, and the shell is provided with a cavity for installing the core body. The top and the bottom are oppositely arranged in the height direction X of the cavity, and the side portion is located between the top and the bottom. The top part is open, and grooves are formed in the bottom part and / or the side parts; and the groove extends towards the direction far away from the core body. Provided is a sensor that does not easily sense abnormalities after long-term use.

The invention relates to a relative pressure sensor (1) for determining and / or monitoring a pressure (p1) of a medium (2), with - a housing (3) with a wall (20) and an interior (21), - a pressure sensor (4) arranged in the interior (21) with a first surface (5) and a second surface (6), wherein the first surface (5) can be subjected to the pressure (p1) of the medium (2) and the second surface (6) can be subjected to a reference pressure (p2), - an opening (7) arranged in the wall (20), - a reference pressure supply (8) which is designed to supply the reference pressure (p2) from the opening (7) to the second surface (6), - an alignment sensor (9) which is designed to detect an alignment of the relative pressure sensor (1), - an evaluation unit (10) which is designed to determine an orientation of the opening (7) based on the detected orientation, - a warning unit (11) which is designed to issue a warning if the determined orientation corresponds to a predetermined misalignment.

Pressure sensors, including pressure sensors for automated peritoneal dialysis (APD) systems, and associated systems, devices, and methods are disclosed herein. In one embodiment, an APD system includes a diaphragm positioned over an opening in a disposable set that includes one or more fluid lines. The diaphragm is affixed to the disposable set about a periphery of the opening. The APD system further includes a pressure sensor configured to measure a pressure of fluid flowing through the disposable set. The pressure sensor includes a load cell and an indenter. The indenter can be moveable along an axis such that, when the diaphragm is aligned with the axis, a convexly curved surface of the indenter can be positioned against the diaphragm. When the indenter is contacting the diaphragm, the load cell can measure a force applied to the load cell by the diaphragm and / or by the fluid flowing through the disposable set.