35results about How to "Realize pressure measurement" patented technology

The invention discloses an icing wind tunnel pressure measurement test method. The method is based on an existing icing wind tunnel model icing test. The method comprises: establishing a wind tunnel test method integrating a model icing test and an ice-shaped aerodynamic influence evaluation test, improving the accuracy of a test result is improved while the aerodynamic test efficiency, firstly, installing a pressure measurement model according to a conventional pressure measurement test method, and connecting a pressure measurement hole to a scanning valve quick connector through a pressure measurement hose; calibrating and grouping the pressure values of the pressure measuring holes under different speed pressures; when a cloud-containing pneumatic test is carried out, using an externalair source for supplying pressure and blowing air to the pressure measuring hole; after the outer surface of the model is frozen, closing the pressure measuring hole for air supply, performing a pressure measuring test with an ice shape according to a conventional method, and finally obtaining the aerodynamic characteristics of the ice-shape-containing model. According to the invention, the problem that the pressure measurement test cannot be carried out on the model pressure measurement hole of the icing wind tunnel in a cloud state is solved.

The present invention discloses an absolute pressure fiber fabry-perot silicon carbide heat-resistant aviation pressure sensor. A sensing head in the sensor employs a total SiC structure of a siliconcarbide sensing mebrane and a silicon carbide substrate to achieve vacuum fabry-perot cavity structure through direct binding; the sensor provided by the invention comprises a silicon carbide sensingmebrane, a silicon carbide substrate, optical fibers, a molybdenum package seat and a molybdenum package body; the SiC sensing mebrane and the SiC substrate are installed below a zirconium oxide substrate, one end of the optical fibers is bonded on the SiC substrate, the zirconium oxide substrate is installed in a countersunk head cavity of the molybdenum package seat, and the molybdenum package body is in threaded connection with the lower portion of the molybdenum package seat; and the other end of the optical fibers passes through a B center through hole on the molybdenum package seat. Theabsolute pressure fiber fabry-perot silicon carbide heat-resistant aviation pressure sensor is suitable for the in-situ real-time measurement of the aviation engine high-temperature dynamic pressure and flow field features, and is miniaturized, high in precision and resistant to electromagnetic interference.

The present invention provides a remote transmission module used for a remote transmission pressure transmitter. The remote transmission module comprises a remote transmission part and a tantalum mebrane (6), a tetrafluorohydrazine sleeve (2) and a tetrafluorohydrazine cover (4) coating the outer surface of the remote transmission part, and a fluororubber seal ring configured to seal the tantalummebrane (6), the tetrafluorohydrazine sleeve (2) and the tetrafluorohydrazine cover (4). The present invention further provides a remote transmission pressure transmitter having the remote transmission module. Compared to an original a remote transmission pressure transmitter made of tantalum materials. The remote transmission pressure transmitter reduces the production and usage cost and ensure the long-term, stable and safe work of an instrument.

The invention discloses a nitrogen spring with a self-induction monitoring function. The nitrogen spring comprises a nitrogen spring body and a self-induction assembly, wherein an inflation connectoris arranged on the nitrogen spring body, the self-induction assembly comprises an adapter, a hose, an inflation one-way valve and a wireless pressure sensor with a wireless signal transmitter, whereinone end of the adapter is connected with the inflation connector of the nitrogen spring body, the other end of the adapter is connected with one end of the hose, the other end of the hose is connected with the gas outlet end of the inflation one-way valve, and a one-way valve connector is arranged on the wireless pressure sensor and connected with the inflation end of the inflation one-way valve.The invention further provides a nitrogen spring pressure monitoring system, and the nitrogen spring pressure monitoring system comprises a signal receiving assembly and at least one nitrogen spring.According to the nitrogen spring with the self-induction monitoring function and the pressure monitoring system thereof, a pressure value and a pressure change condition of the nitrogen springs can be checked in real time, and the nitrogen springs to be damaged can be conveniently found in advance.

The invention provides a pneumatic type multifunctional pressure scanning valve. The pneumatic type multifunctional pressure scanning valve comprises a valve shuttle, a valve body and a power assembly, the valve shuttle linearly slides in the valve body through the power assembly, a middle pipeline a and a middle pipeline b are arranged in the valve shuttle, and a calibration air source pipeline, a detected air source pipeline and a pressure sensor pressure measuring end pipeline are arranged in the valve body. The valve shuttle reaches the first valve position under the action of the power assembly, and the calibration air source pipeline and the pressure sensor pressure measuring end pipeline communicate through a middle pipeline a. The valve shuttle reaches the second valve position under the action of the power assembly, and the detected air source pipeline communicates with the pressure sensor pressure measuring end pipeline through a middle pipeline b. According to the pressure scanning valve, the working modes can be simply and rapidly switched, a tedious switching control system and various valves are not needed, and miniaturization design of the pressure scanning valve is better facilitated.

A pressure sensor / transducer for transforming pressure to force contains force sensor and connecting element assembled by connecting module. Its technical features are: stressed block of connecting element is assembled on force sensor. Upper stress bar connecting with stressed block is jointed with lower vector bar by connecting hard-core and does advance and return movement along the internal cavity, which holds the two bars. Compressed aneroid of connecting element is fixed in adapting flange. Pressed body connecting the bottom end of lower vector bar is packaged in compressed aneroid by at least one corrugated diaphragm. It has more rational structural design and takes full advantages of sensor characteristics including simple construction, low cost and high precision etc. It can transform pressure to force in cooperation with connecting element, use force sensor with one measuring range to measure pressure with multi-range and complete measurement of plus-minus pressure under both high and low temperature, which reduce cost, improve measuring precision and extend application range greatly.

The invention relates to the field of a pressure sensor, particularly a high-temperature ceramic pressure sensor for a pressure test in a high temperature environment and a processing method of the high-temperature ceramic pressure sensor. The effective pressure test can be implemented in a special high temperature environment for a long time. The high-temperature ceramic pressure sensor comprises a pressure sensing ceramic element, wherein a closed chamber is arranged inside the pressure sensing ceramic element; the upper and lower planes of the pressure sensing ceramic element are respectively provided with an electrode layer and a planar spiral inductor; the two electrode layers form a capacitor; and the capacitor is connected in series with the two planar spiral inductors to form an LC loop. The processing steps are as follows: a, curtain coating; b, punching; c, stacking and filling; d, laminating and thermal cutting; e, high-temperature sintering; f, printing and low-temperature sintering; and g, cavity sealing. The sensor and the method disclosed by the invention can design and realize a concrete structure of sensitive elements of the sensor at a totally new angle; the structure is ingenious and reasonable; and a passive wireless high-temperature ceramic pressure sensor for the detection in a noncontact wireless manner based on an LC resonance theory is realized, so that the pressure test can be performed for a long time at a high temperature higher than 300 DEG C.

The present invention discloses a pressure gauge and a method for measurement of pressure. The pressure gauge comprises a body, and a plurality of pressure sensors and a control circuit which are arranged in the body. The pressure sensors can contact measurement medium in order and can be correspondingly connected with the control circuit in order to output pressure signals. The pressure gauge isemployed to connect the pressure sensors with the control circuit in order to output the pressure signals, and the pressure sensors included in the pressure gauge can continuously work. The method isnot limited to the calibration cycle of one sensor, and therefore pressure measurement with a calibration cycle being longer than the calibration cycle of one sensor is achieved.

The invention discloses an oil well on-line flow closure metering device. The oil well on-line flow closure metering device comprises a metering shell, wherein an oil inlet and an oil outlet are formed in the upper end and the lower end of the metering shell respectively, a separating plate is arranged in the middle of the interior of the metering shell, and an inner cavity of the metering shell is divided by the separating plate into a preservation cavity and a metering cavity; an overflow pipe and a metering inlet are arranged on the separating plate, and the preservation cavity and the metering cavity are communicated through the overflow pipe and the metering inlet; a weighing hopper is supported in the metering cavity through weighing sensors, an upper opening of the weighing hopper is opened, and is correspondingly communicated with the metering inlet, and a metering outlet is formed in the bottom surface of the weighing hopper; a control device comprises two gravity valves, wherein the gravity valves are arranged in a hanging mode, and correspond to the metering inlet and the metering outlet respectively; the control device is electrically connected with the weighing sensors, and is used for executing alternate control over opening and closing movement of the metering inlet and the metering outlet according to data measured by the weighing sensors. The oil well on-line flow closure metering device has the advantages that metering accuracy is high, the oil well on-line flow closure metering device does not need to be attended by workers, the liquid production capacity can be metered in real time, manual metering can be replaced, pressure-bearing metering can be achieved, working reliability is high, and the service life is long.

The invention discloses a micro mud floating electronic pressure gauge, a working method thereof, and a pressure measurement device, relates to the field of oil and gas extraction, and aims to provide a device for measuring underground pressure and temperature in the mud drilling process in real time, and a working method thereof. The technical key point is that: a button cell, a singlechip with acquisition software, a circuit board, a connection block, and a pressure chip are stacked in a shell sequentially from bottom to top; the shell is a cylindrical shell of which the upper and lower ends are provided with openings, and the interior and the exterior of the shell are isolated by isolation protective adhesive; the pressure gauge acquires temperature and pressure information intermittently under a well; and the pressure measurement device comprises the pressure gauge, a data loading system, and a pressure and temperature calibrating device. The pressure gauge is as small as drill cuttings, so the pressure gauge can float in mud and move along with mud, measure pressure timely and recover data, and does not influence the drill construction.

The present invention proposes an LC composite MEMS pressure sensor and a preparation method thereof. The pressure sensor includes: a stacked first substrate and a second substrate; a pressure sensitive film arranged on the upper surface of the first substrate; a groove, arranged on the lower surface of the first substrate, opposite to the pressure sensitive film; an LC sensitive body, arranged on the lower surface of the pressure sensitive film, located in the first groove; the second a groove, arranged on the upper surface of the second substrate, forming a vacuum chamber with the first groove; a third groove, arranged on the lower surface of the second substrate surrounding and spaced apart from the second groove Surface: an inductor coil layer, disposed on the bottom surface of the third groove and a side wall away from the second groove. Under the action of environmental pressure, both L and C of the sensor will change, and the change trend is the same, so it has high sensitivity.

The invention discloses a liquid pressure intensity demonstrator for high school physics teaching. The demonstrator comprises a liquid penetrating part and a pressure intensity measurement part, wherein the liquid penetrating part comprises a main hollow column-shaped column body, the bottom of the main hollow column-shaped column body is provided with a bottom connecting plate structure which isstructurally integrated with the bottom, the bottom of the bottom connecting plate structure is provided with a connecting rod, the bottom of the connecting rod is provided with a gravity hemispheroid, the top of the main hollow column-shaped column body is provided with a top limiting plate structure which is structurally integrated with the top, and the center of the main hollow column-shaped column body is provided with a hollow mobile space. According to the demonstrator, equivalent replacement is utilized, the pressure intensity values of liquid at different depths are determined througha difference between a known air pressure value and a current air pressure value, in addition, the device can be connected with air pipelines with different lengths, the pressure intensity measurementof liquid with a relatively great depth is changed and realized, moreover, the interior of the device does not come into contact with liquid, so that the service life of the device is prolonged, andthe practicability is strong.

The present invention discloses an absolute pressure fiber fabry-perot silicon carbide heat-resistant aviation pressure sensor. A sensing head in the sensor employs a total SiC structure of a siliconcarbide sensing mebrane and a silicon carbide substrate to achieve vacuum fabry-perot cavity structure through direct binding; the sensor provided by the invention comprises a silicon carbide sensingmebrane, a silicon carbide substrate, optical fibers, a molybdenum package seat and a molybdenum package body; the SiC sensing mebrane and the SiC substrate are installed below a zirconium oxide substrate, one end of the optical fibers is bonded on the SiC substrate, the zirconium oxide substrate is installed in a countersunk head cavity of the molybdenum package seat, and the molybdenum package body is in threaded connection with the lower portion of the molybdenum package seat; and the other end of the optical fibers passes through a B center through hole on the molybdenum package seat. Theabsolute pressure fiber fabry-perot silicon carbide heat-resistant aviation pressure sensor is suitable for the in-situ real-time measurement of the aviation engine high-temperature dynamic pressure and flow field features, and is miniaturized, high in precision and resistant to electromagnetic interference.

The present invention provides a MEMS inductive pressure sensor and a preparation method thereof. The pressure sensor comprises: a stacked first substrate and a second substrate; a pressure sensitive film arranged on the upper surface of the first substrate; a first substrate a groove, arranged on the lower surface of the first substrate, opposite to the pressure-sensitive film; a ferromagnetic core, arranged on the lower surface of the pressure-sensitive film, located in the first groove; a second groove a groove, arranged on the upper surface of the second substrate, and forming a vacuum cavity with the first groove; a third groove, arranged on the lower surface of the second substrate around and spaced from the second groove ; The inductor coil layer is arranged on the lower surface of the second substrate. The sensor has simple structure, excellent linearity, high sensitivity, small temperature drift and wide application scenarios.

The invention belongs to the technical field related to inkjet printing, and specifically discloses an inkjet printing multi-nozzle ink path air pressure control system and its application, which includes a positive pressure generation and adjustment unit, a negative pressure generation and adjustment unit, an ink path and a nozzle unit And the air circuit and ink circuit control unit, the positive pressure generation and adjustment unit and the negative pressure generation and adjustment unit are respectively connected with the ink circuit and the nozzle unit, and are used to provide positive pressure gas and negative pressure gas for the ink circuit and the nozzle unit , the gas circuit and the ink circuit control unit are respectively connected with the positive pressure generation and adjustment unit, the negative pressure generation and adjustment unit, the ink circuit and the nozzle unit, and are used to coordinate and control these three units to pass the positive and negative pressure gas The control realizes high-precision inkjet printing. The invention can realize functions such as ink supply and pressure of ink or solution in the ink path, jet printing, low-frequency jet, nozzle cleaning, ink recovery, etc., and has the advantages of compact structure, stable pressure, easy manipulation, high precision and high degree of automation.

The invention provides an optical system and a fluorescence measurement and pre-positioning method thereof. The optical system comprises a positioning platform, a laser source, an illuminating light source, a control unit, a dichroscope, a semi-reflection mirror, a beam splitter, an image pickup unit and a display unit. The method comprises the following steps: positioning a first position by laser, wherein the display position of the cross point of cross hairs in the display unit is the first position; placing a diamond anvil cell on a positioning platform; moving the positioning platform so that the display position of ruby in a diamond anvil cell sample cavity in the display unit is the first position to finish fluorescence measurement; recording the coordinates of the positioning platform; and finally, correcting the recorded coordinates according to the diamond refractive index in the diamond anvil cell. In the invention, pressure measurement and pre-positioning of the diamond anvil cell sample cavity can be realized, the calibration of pressure of the sample cavity depending on a Raman spectral system is avoided, and the positioning time of a diamond anvil cell sample cavity experiment by an X-ray diffraction system is shortened.

The invention discloses a novel transmissible pressure and differential pressure transmitter for measuring pressure of an ultrahigh temperature medium. A measuring diaphragm and an isolating diaphragm are respectively welded on the outer end faces of a connecting flange and an isolating flange, a radiating tube is welded between the connecting flange and the isolating flange, and then ultrahigh temperature resistant high-viscosity high-temperature tube filling liquid is injected to form an ultrahigh temperature tube filling liquid cavity; and a matching flange is welded on the other end of the isolating flange to connect a stainless steel capillary tube and the pressure and differential pressure transmitter, and low-viscosity high-temperature tube filling liquid is injected to form a normal high-temperature tube filling liquid cavity. In the working process, the pressure of the ultrahigh temperature medium is transmitted to the isolating diaphragm through the ultrahigh temperature resistant high-viscosity high-temperature tube filling liquid, and then transmitted to the main body of the pressure and differential pressure transmitter through the low-viscosity high-temperature tube filling liquid in the stainless steel capillary so that the pressure transmission and measurement are realized. By means of high temperature isolation and radiation, the ultrahigh temperature is not directly transmitted to the low-viscosity high-temperature tube filling liquid so as to protect the high-temperature transmissible pressure and differential pressure transmitter and realize the pressure measurement of the ultrahigh temperature medium.

The invention discloses an icing wind tunnel pressure measurement test method. On the basis of the existing icing wind tunnel model icing test, a wind tunnel that integrates the model icing test and the ice shape aerodynamic impact evaluation test is established. The hole test method will help improve the efficiency of the pneumatic test and improve the accuracy of the test results. First, install the pressure measurement model according to the conventional pressure measurement test method, and connect the pressure measurement hole to the quick connector of the scanning valve through the pressure measurement hose; then Calibrate and group the pressure values ​​of the pressure measuring holes at different speeds and pressures; when carrying out the aerodynamic test with clouds and fog, the pressure measuring holes are supplied with air from an external air source; after the surface of the model freezes, the air supply to the pressure measuring holes is closed, The pressure measurement test with the ice shape is carried out according to the conventional method, and finally the aerodynamic characteristics of the model with the ice shape are obtained; the invention solves the problem that the pressure measurement hole of the model pressure measurement hole of the icing wind tunnel cannot be carried out in the cloud and fog state.

The invention discloses a liquid pressure intensity demonstrator for high school physics teaching. The demonstrator comprises a liquid penetrating part and a pressure intensity measurement part, wherein the liquid penetrating part comprises a main hollow column-shaped column body, the bottom of the main hollow column-shaped column body is provided with a bottom connecting plate structure which isstructurally integrated with the bottom, the bottom of the bottom connecting plate structure is provided with a connecting rod, the bottom of the connecting rod is provided with a gravity hemispheroid, the top of the main hollow column-shaped column body is provided with a top limiting plate structure which is structurally integrated with the top, and the center of the main hollow column-shaped column body is provided with a hollow mobile space. According to the demonstrator, equivalent replacement is utilized, the pressure intensity values of liquid at different depths are determined througha difference between a known air pressure value and a current air pressure value, in addition, the device can be connected with air pipelines with different lengths, the pressure intensity measurementof liquid with a relatively great depth is changed and realized, moreover, the interior of the device does not come into contact with liquid, so that the service life of the device is prolonged, andthe practicability is strong.

The invention relates to the technical field of high-precision optical fiber pressure sensing, in particular to an optical fiber pressure sensing measurement method and device. The optical fiber pressure sensing measurement method and device solve the technical problems in the prior art and are simple in structure and high in measurement accuracy. When outside pressure is applied to an optical fiber serving as a detector, the optical path for optical pulses to transmit in the optical fiber changes, the change of the optical path is measured in real time through an autocorrelator, and therefore the pressure applied to the optical fiber can be obtained. According to the method and device, laser beams are output through a pulse laser; the beams output from the laser are divided into two paths of optical signals after passing through a filter, a circulator and a coupler, one path of optical signals are measurement path optical signals, the other path of optical signals are reference path optical signals, and an outside pressure value is obtained according to the formula in the specification by measuring whether outside pressure exists or not and measuring the interval delta T and T of the autocorrelator.