373results about "Fluid pressure measurement" patented technology

The invention provides methods and devices for stereo encoding and decoding using complex prediction in the frequency domain. In one embodiment, a decoding method, for obtaining an output stereo signal from an input stereo signal encoded by complex prediction coding and comprising first frequency-domain representations of two input channels, comprises the upmixing steps of: (i) computing a second frequency-domain representation of a first input channel; and (ii) computing an output channel on the basis of the first and second frequency-domain representations of the first input channel, the first frequency-domain representation of the second input channel and a complex prediction coefficient. The method comprises applying independent bandwidth limits for the input channels.

This invention discloses a method and system for monitoring the status of ring main units (RNBs) compatible with sulfur hexafluoride (SF6) and environmentally friendly gases, belonging to the field of RNB monitoring technology. The method includes the following steps: acquiring gas chamber pressure-temperature curves, recording the rate of change under rapid cooling scenarios, and constructing a pressure response rhythm; identifying rate deviation segments and generating a dynamic compensation and correction sequence; reordering the pressure curves temporally to restore the true correspondence; generating a dynamic evolution curve of insulation margin and superimposing it with the electric field change rhythm to form an early risk indication result; and converting the alarm criterion into an insulation margin change trend to achieve early alarm detection. This invention improves the accuracy of gas insulation status judgment by reconstructing the pressure response rhythm under sudden temperature drops and reordering the temporal sequence; simultaneously, it replaces the temperature-density criterion with the dynamic evolution trend of insulation margin, achieving early alarm detection and risk warning control before peak load periods.

The utility model discloses an embedded pressure sensor, including pressure sensor body and casing, the inside of casing forms the positioning slot that matches with the diameter of pressure sensor, and one end of pressure sensor body is embeddedly arranged in the positioning slot, and the outer ring surface of casing is equipped with the wiring slot, and the wiring pipe on pressure sensor body extends to the outside through wiring slot, and the outside of pressure sensor body is equipped with the compression ring, and the opening end surface of casing is equipped with the lower compression ring with the thread, and the one end of lower compression ring is curved inwards and forms the extrusion part, and the outer ring surface of lower compression ring is equipped with the locking assembly of lower compression ring positioning. The utility model discloses simple structure, and wiring pipe can enter the wiring slot after pressure sensor body is embedded in casing, can carry out the circumferential positioning to pressure sensor body, and after lower compression ring is threadedly connected on casing, can set up pressure sensor tightly in casing downwards, to ensure the stability of installation.

The invention relates to a heat-insulating film (2) for a pressure sensor (1) for determining the pressure of a fluid medium (F), comprising a film body (3) and a coating (5), a film surface (6) of the film body (3) facing the fluid medium (F) when the heat-insulating film (2) is used. The coating (5) has a layer-like structure (7), the longitudinal extension (DL) of which perpendicular to the film plane (XY) is at most half of the transverse extension (DQ) of which parallel to the film plane (XY) for a plurality of layers (9).

This utility model belongs to the field of industrial instrument maintenance technology, specifically relating to a portable online cleaning device for flow meters. It includes an air tank, a pressure regulating valve connected to the top surface of the air tank, a pressure gauge connected to one side of the pressure regulating valve, and a quick connector connected to the other side of the pressure regulating valve. A medium flow pipe is connected to the surface of the air tank, and an electric air source is connected to the other end of the medium flow pipe. A knob is connected to the top surface of the air tank, and a handle is also connected to the surface of the air tank. When cleaning gas or steam flow meters, the lithium battery-powered electric air source drives the compressed air in the air tank. After the pressure is regulated by the pressure regulating valve, the compressed air is delivered to the flow meter through the quick connector. This portable gas-liquid time-division multiplexing type online cleaning device for flow meters, with its significant advantages of high efficiency, low cost, and high versatility, brings a new solution to the field of industrial instrument maintenance, effectively improving production efficiency and reducing enterprise operating costs.

The application provides a molten steel maximum transfer temperature determination method for avoiding excessive sintering of drainage sand to cause ladle oxygen burning and tapping. The method first breaks the sintered shell of the drainage sand formed at different molten steel temperatures to obtain a broken pressure P at different temperatures T, and draws a T-P curve graph with the temperature T as the horizontal axis and the broken pressure P as the vertical axis. In the actual production process, the actual molten steel pressure P0 received by the drainage sand is calculated, and the corresponding temperature is obtained through the T-P curve graph, that is, the molten steel maximum transfer temperature T max . According to the above determined molten steel maximum transfer temperature, the self-opening of the drainage sand of 100 IF steel ladles in the actual production process is tracked, and it is found that when the transfer temperature of the molten steel is lower than T max , the self-opening rate of the ladle drainage sand can reach 100%, and when the temperature is higher than T max , the self-opening rate of the ladle drainage sand is reduced to 33.3%, which proves the accuracy of T max determined according to the method provided by the application.

The invention relates to a disposable adapter by means of which pressure measuring devices (2) can be attached to pressure ports (31, 31') of process systems (3) under sterile conditions. For this purpose, the disposable adapter (1) comprises the following components: a separating membrane (11) elastic within the intended pressure measuring range, with a collar (111) circumferentially extending around its edge; and a connector (12) which encloses the separating membrane (11) at the collar (111), by means of which the pressure measuring device (2) can be attached to the adapter (1), and with a connection means (121) via which the adapter (12) can be connected to the pressure port (31) in such a way that the separating membrane (11) provides a media-tight separation between the process system (3) and the pressure measuring device (2).

Disclosed are methods and apparatus for delivering an active pharmaceutical ingredient (API) to a substrate, such as an edible. In particular, an API-containing liquid is dosed from a dosing head in small increments. Because the volume of API-containing liquid dosed in each increment is known, and the concentration of API in the API-containing liquid is known, the amount of API incrementally driven out of the dosing head in the API-containing liquid is known. Among the API driven out of the dosing head, a majority can be delivered to the substrate, for instance as individual successive droplets or as a stream. A minority can remain adhered to the dosing head as a residual API. A wash fluid can be applied to the dosing head to remove the residual API and deliver the residual API to the substrate.

The utility model discloses a kind of moulds for automobile knock sensor, it is related to the field of application of automobile knock sensor, including detection equipment, the side of the detection equipment is provided with first support, and the inside of first support is provided with second support, and the inside of first support is rotatably connected with positive and negative screw rod, the outside of positive and negative screw rod is threadedly connected with two groups of moving seat, and the bottom of two groups of moving seat is movably installed with two groups of fixed rods, and the outside of two groups of fixed rods is all equipped with first spring, one end of two groups is provided with fixed block, and the other end of two groups of fixed rods is provided with clamping block, the inside of first support is provided with fourth support, and the top of fourth support is rotatably connected with knock plate, and one end of knock plate is connected with driving assembly. The utility model is connected by two groups of first spring by setting clamping block, and sensor is clamped, so that the detection of sensor is more convenient.

This invention relates to the field of geological disaster monitoring technology, and in particular to an impact-resistant debris flow impact force monitoring device, comprising a monitoring pile with a fixed plate fixedly sleeved on its outer wall; a monitoring assembly, which includes support rods slidably disposed on both sides of the fixed plate, one end of which is fixedly connected to a baffle, and the other end of which is mounted with a laser displacement sensor via a connecting block; a scale cooperating with the laser displacement sensor is fixedly connected to the fixed plate; the invention utilizes the following: as the baffle moves backward, it drives a buffer rod B to move into a hydraulic cylinder, and the piston at one end of the buffer rod B slides inside the hydraulic cylinder, compressing the medium inside the hydraulic cylinder. This, combined with the elastic buffering effect of spring B, forms a two-stage hydraulic buffer. Simultaneously, the sleeve slides relative to the buffer rod A, and spring A undergoes elastic deformation, forming a first-stage elastic buffer. The two-stage buffering structure works synergistically to weaken the strong impact load of the debris flow.

This utility model provides a monitoring module for a granulator grease heating system, comprising: a base bolted to one side of the granulator spindle box; a positioning support rod welded to one side of the base; a vibration-transmitting slide plate fitted onto the side of the positioning support rod away from the bottom; and a mounting base plate welded to the bottom of the side of the vibration-transmitting slide plate away from the positioning support rod; a damping plate 5 positioned on the left or right side of the top of the mounting base plate; and a sensor threadedly inserted into the center of the side of the damping plate away from the mounting base plate. This utility model employs a two-section damping bracket. One section features a damping plate with a connecting waist hole fitting design for buffering effect, preventing the sensor from breaking compared to rigid fixation. The second section comprises a vibration-transmitting slide plate, a positioning support rod, and a base, transmitting some vibration to the external bracket, reducing the axial stress acting on the hexagonal bolt threaded rod, and preventing the hexagonal bolt from loosening.

Methods, apparatuses and systems for providing offset calibration and fault monitoring are disclosed herein. An example controller component may comprise: a resistance-based bridge circuit; a signal conditioning circuit configured to condition an output of the resistance-based bridge circuit; a first diagnostic circuit coupled to the signal conditioning circuit configured to monitor an output of a first branch of the resistance-based bridge circuit; and a second diagnostic circuit coupled to the signal conditioning circuit configured to monitor an output of a second branch of the resistance-based bridge circuit.

This invention relates to the field of engineering geological reinforcement technology, specifically disclosing an intelligent grouting reinforcement device and grouting process monitoring method for red bed engineering. The device includes a grouting pump, a porous grouting pipe, a pressure sensor, and an intelligent control module. The porous grouting pipe is made of corrosion-resistant material, with spirally staggered grouting holes on its sidewall. Filters are installed inside / at the holes. One end of the pipe is a closed end with a guide cone, and the other end is a pump connection end. The pressure sensor is embedded in the pipe wall, collecting pressure data in real time and transmitting it wirelessly. After receiving the data, the intelligent control module adjusts the grouting pump parameters through data processing, execution control, and alarm units, triggering an alarm in case of abnormalities. The monitoring method continuously collects data through the pressure sensor, and the intelligent control module determines thresholds and dynamically adjusts the system. This invention achieves full-process intelligent grouting, improving the stability and safety of red bed engineering and providing data reference for subsequent similar projects.

The utility model discloses a kind of pressure measuring connector of quick reaction opening, it is related to pressure measuring connector technical field, including connector body, fixed interface is fixedly installed in connector body bottom, sealing cover body is threadedly installed on connector body upper end, rotating interface is rotatably installed on sealing cover body, and the rotating interface and fixed interface are all opened with butt joint thread, valve core assembly is installed in connector body, valve core assembly includes spring pad foot fixedly installed in connector body bottom, reset spring is installed on spring pad foot, valve core body is slidably installed in connector body, sealing assembly is installed above valve core body, valve core assembly further includes valve core hole being arranged in the intermediate position of valve core body and wedge-shaped groove being arranged around valve core hole.The pressure measuring connector of quick reaction opening, by the cooperation of valve core assembly and sealing assembly, pressure gauge can conveniently detect the pressure in pipeline quickly.

This invention belongs to the technical field of atmospheric detection systems and discloses a quick-connect structure for a pressure sensing device. It comprises a quick-connect structure for the air path and a quick-connect structure for the circuit, used for quick assembly and disassembly of the sensor and the calculation component of the pressure sensing device. The quick-connect structure for the air path includes an air path socket, an air path plug, and an O-ring. The air path socket and plug are respectively positioned at corresponding locations on the sensor and the calculation component, and are sealed by the O-ring after connection. The quick-connect structure for the circuit includes a floating mounting socket and a plug, which are respectively positioned at corresponding locations on the sensor and the calculation component. This invention solves the problem that the sensor and calculation component of traditional surface pressure sensing devices cannot be quickly disassembled, achieving quick connection of the air path while ensuring airtightness.

The application provides an inflation monitoring device, relates to the technical field of inflation, and comprises a monitoring table with a gas channel, an air inlet and an air outlet which are communicated with the gas channel are arranged on the monitoring table, a monitoring groove is arranged on the monitoring table and located on the side of the gas channel, a circuit board is arranged in the monitoring groove, the monitoring groove comprises a monitoring cavity which is located between the circuit board and the gas channel, the monitoring cavity is communicated with the gas channel, the circuit board seals the monitoring cavity in cooperation with the inner wall of the monitoring groove, and a pressure sensor is arranged on the circuit board and located in the monitoring cavity. The monitoring groove is arranged in the monitoring table, the monitoring groove is communicated with the gas channel, the circuit board is arranged in the monitoring groove, the pressure sensor is arranged on the circuit board and located on the side of the gas channel, the pressure of the gas in the gas channel is monitored through the pressure sensor, and the pressure monitoring is more convenient without connecting the pressure gauge to the pipeline for pressure monitoring.

This invention discloses a method for testing the oxygen partial pressure of a pressurized oxygen supply mask. The pressurized oxygen supply mask is placed inside a sealed container. The data cable of the oxygen partial pressure sensor on the pressurized oxygen supply mask passes through the sealed container in a sealed manner. A vacuuming device and an oxygen supply device are connected to the outside of the sealed container. A temperature sensor for monitoring the internal temperature is installed on the sealed container. The sealed container is first evacuated and then filled with oxygen. The theoretical value of the oxygen partial pressure inside the sealed container is then calculated, and the corresponding phase value output by the oxygen partial pressure sensor is recorded. Then, the theoretical values ​​and phase values ​​of the oxygen partial pressure at different temperatures are collected, and the data is fitted to calibrate the parameters relating the measured value and the phase value of the oxygen partial pressure sensor. These parameters are then written into the oxygen partial pressure sensor. Finally, the theoretical value of the oxygen partial pressure is compared with the measured value of the oxygen partial pressure sensor to verify the accuracy of the oxygen partial pressure sensor. This method can accurately test the accuracy of the oxygen partial pressure sensor on a pressurized oxygen supply mask.

This utility model discloses a rotary display mechanism for a digital pressure gauge, specifically relating to the field of digital pressure gauge technology. It includes a gauge head, a fixed tube fixedly connected to the bottom of the gauge head, an insert tube inserted into the bottom of the fixed tube, a limit plate fixedly connected to the bottom of the insert tube, a screw head fixedly connected to the bottom of the limit plate, and a connecting threaded tube fixedly connected to the bottom of the screw head. This utility model first rotates the gauge head to compress the toothed groove against the compression plate, thereby compressing the spring until one side of the compression plate meshes with the other side of the toothed groove. This allows for adjustment of the gauge head's display angle, facilitating easy reading of pressure values ​​in various complex installation environments, improving ease of use and flexibility. Furthermore, the cooperation between the sealing groove and the guide tube with the sealing tube effectively prevents external impurities from entering and internal media leakage, protecting the internal components of the digital pressure gauge, ensuring the accuracy of measurement data, and extending the equipment's service life.

The present application relates to the technical field of vehicle advanced auxiliary driving system calibration, in particular to a commercial vehicle production line segmented TPMS calibration method, when the tire assembly station, after confirming the vehicle VIN, the vehicle VIN is scanned by the scanning gun and automatically filled into the VIN field of the collection interface; the electric control data management platform calls the related configuration word information of the vehicle driving form through the vehicle VIN, and transmits to the upper computer collection interface; the scanning gun scans the tire pressure sensor ID two-dimensional code information on each tire, and transcribes the scanning result to the corresponding tire position of the collection interface; after the information collection of all tire pressure monitoring sensors of the vehicle is completed, the information is uploaded to the electric control data management platform, and all sensor IDs of the vehicle are inquired according to the vehicle VIN on the platform; before the vehicle is offline, the VDI diagnostic instrument is connected with the vehicle OBD interface, the VDI diagnostic instrument calls the tire pressure sensor ID information from the electric control data management platform, and writes into the TPMS controller through the OBD interface, and the whole TPMS calibration is completed.

This invention discloses a method for fabricating a near-zero temperature coefficient thin-film pressure sensor with a wide temperature range. The purpose of this invention is to address the common problem of insufficient environmental adaptability in existing flexible thin-film sensors, particularly the significant performance degradation under extreme temperature conditions. This invention proposes a wide-temperature-range intrinsically self-compensating flexible pressure sensor based on a PVDF / CFT / Cu composite sensing material thin film. This sensor achieves a near-zero temperature coefficient of resistance for the composite material by synergistically introducing carbon fiber tubes with negative temperature coefficients and copper nanoparticles with positive temperature coefficients into the flexible PVDF matrix and dynamically controlling their ratio, thereby constructing a temperature self-compensation mechanism at the material level. This invention provides an effective material solution for developing next-generation high-reliability, wide-temperature-range adaptive flexible sensing systems.

The application provides a kind of track car high temperature melt discharge intelligent acquisition system and method for titanium sponge production, it is related to titanium sponge smelting technical field, in the bottom of track car installation magnetic encoder and in the installation magnetic code label of still steaming stove entrance, form magnetic code positioning module, realize the positioning of track car and still steaming stove, install pressure sensor in inverted U type furnace reactor, for detecting pressure change in high temperature melt discharge process after positioning is completed, and generate trigger signal, the trigger signal includes initial acquisition signal and end acquisition signal, weighing module is used to collect the initial weight of ladle when receiving initial acquisition signal, collect the end weight of ladle when receiving end acquisition signal, data processing unit obtains high temperature melt discharge weight by calculating the difference between end weight and initial weight of ladle, solve the problem that existing high temperature melt discharge acquisition is not intelligent and low accuracy, the application is suitable for titanium sponge production.

The utility model relates to pressure sensor technical field, concretely relates to a kind of high-temperature-resistant pressure sensor chip packaging fixture, including upper clamp and lower clamp, upper clamp includes upper clamp one part, upper clamp one part is formed with first placement slot, first placement slot is used to place and hold expansion alloy shell, expansion alloy shell is used to be connected with glass base, lower clamp is used to limit chip, upper clamp and lower clamp are matched and are used to expansion alloy shell and chip, so that first placement slot can resist push expansion alloy shell, so that glass base is extruded and adheres to chip under melting state;Upper clamp and lower clamp are all made of graphite, and upper clamp one part is made of elastic graphite, so that expansion alloy shell after heating can expand in horizontal and vertical direction. The high-temperature-resistant pressure sensor chip packaging fixture of the application can improve the yield of leadless sintering, so that the sintered pressure sensor chip is more stable and reliable.

The utility model discloses a kind of electric furnace circulating water safety monitoring systems, specifically related to electric furnace circulating water safety monitoring technical field, including box, water inlet pipe and water outlet pipe are arranged in the middle part of box, the inner chamber top of box is provided with control host, first temperature sensor and humidity sensor, the front side of box is provided with access door and control panel. The utility model is first used for monitoring the pressure of water in water inlet pipe by the first pressure sensor of setting, the flow of water in water inlet pipe is measured by setting first flow sensor, the temperature of water inlet is monitored in real time by setting second temperature sensor, the water quality of water inlet is detected by water quality sensor, prevent corrosion or blockage to electric furnace due to water quality problem, by setting multiple sensors, the temperature, pressure, flow and water quality etc. Parameters of circulating water can be monitored in real time, accurately, potential problem is found in time, and it provides guarantee for the safe operation of electric furnace.

This application provides a sensor assembly, including a housing, a circuit board unit, a base, and a temperature sensing element. The sensor assembly has an inner cavity and a channel. The base is at least partially housed in the inner cavity and includes a first wall portion having a first surface and a second surface. The circuit board unit is located on the side of the first surface. The temperature sensing element includes a temperature-sensing portion and a conductive portion. The channel and the temperature-sensing portion are located on the side of the second surface. The base also includes a receiving portion and an insulating portion. At least a portion of the conductive portion and at least a portion of the insulating portion are both housed in the receiving portion. The insulating portion is located between the peripheral wall of the base forming the receiving portion and the conductive portion. The at least a portion of the conductive portion housed in the receiving portion and the peripheral wall of the base forming the receiving portion are respectively sealed to the insulating portion. The conductive portion is electrically connected to the temperature-sensing portion and the circuit board unit. The sensor assembly provided by this application has good sealing performance.

This invention discloses a control box device and application method for a three-compartment pressure slack probe differential pressure self-balancing, including a pressure slack probe control box, a three-compartment pressure slack probe, and a nitrogen power source. The pressure slack probe control box contains a first gas compartment, a water compartment, and a second gas compartment. Adjacent compartments are connected by a deformable partition, springs, and a transmission rod, forming a mechanical differential pressure self-balancing mechanism. When a pressure difference occurs between the water compartment and any gas compartment, the deformable partition displaces under the pressure difference, changing the compartment volume, and the springs provide a reverse elastic force, achieving self-regulating balance between water and gas pressure. This invention solves the problems of complex differential pressure adjustment operation, measurement distortion caused by pressure imbalance, and instability during the pressure slack membrane adhesion process in traditional pressure slack probes, providing continuous and stable control throughout the testing process.

This application discloses a sensor assembly, including an insulating substrate comprising a first surface and a second surface disposed opposite to each other; a surface acoustic wave (SAW) pressure sensor disposed on the first surface, the SAW pressure sensor comprising a piezoelectric lithium niobate layer and two pairs of interdigital transducers disposed on the surface of the piezoelectric lithium niobate layer, the piezoelectric lithium niobate layer having a cavity and a corresponding thinned sensitive membrane region, the two pairs of interdigital transducers being disposed around the thinned sensitive membrane region in mutually perpendicular directions; and a platinum resistance temperature sensor and an interdigital capacitance humidity sensor disposed on the second surface. By having the SAW pressure sensor, platinum resistance temperature sensor, and interdigital capacitance humidity sensor disposed opposite to each other on the insulating substrate, combined with the cavity formed on the piezoelectric lithium niobate layer, and the two pairs of interdigital transducers disposed in mutually perpendicular directions, the detection accuracy is improved and crosstalk is reduced.

The utility model relates to stainless steel jar body detection technical field, and disclose a kind of stainless steel jar body pressure detection device, including detection table, the side fixed mounting of detection table has support frame, the top surface fixed mounting of support frame has lifting assembly, the bottom surface fixed of lifting assembly is provided with fixed frame.This stainless steel jar body pressure detection device, through the setting of inflation pipe and pressure gauge, opens electric push rod, so that push plate pushes inflation pipe and inserts into the entrance of stainless steel jar body, sealing piece and silica gel pad seal, opens air pump, by gas hose and inflation pipe to the inside of stainless steel jar body inflation, closes valve after inflation, two groups of pressure gauge detect the pressure change of stainless steel jar body simultaneously, avoid only one group of pressure gauge failure influence detection, data is more accurate, and multiple groups of stainless steel jar body detection can be carried out simultaneously, the connection separation of detection component and stainless steel jar body is also very fast, improves detection efficiency.

The utility model discloses a pressure gauge with protective structure relates to pressure gauge field, the utility model discloses a pressure gauge, the pressure gauge includes the watch body, the watch body's front and back both -ends are provided with fixed base and protective buckle cover respectively, through setting up the slip joint structure of fixed base and protective buckle cover, wherein the slide slot that has the ball is set in the loading groove of fixed base, and the slide of protective buckle cover is through the slide slot and utilizes the through -hole and ball joint and realizes one -way locking, the technical problem of the low efficiency of installation and removal of the pressure gauge with protective structure of existing because of adopting many bolt fastening shell, and the operator needs to spend a lot of time and loosens, tightens bolt one by one, and further increases maintenance and dismounting difficulty, and the heating film, wiring port and button of the sliding cover inner wall, the technical problem of the pressure gauge with protective structure of existing in the humid environment visible port easy to fog and lead to the dial reading unclear.

The invention relates to a method for detecting a signal calming of an output signal (I) of a sensor (1), comprising the following steps: - applying the at least one chemical and / or physical process variable or a signal representing the chemical and / or physical process variable to the sensor (1) (S100); - sampling the output signal (I) of the sensor (1) n times, said output signal being output by the sensor (1) in response to the application, in order to obtain correspondingly sampled measurement values (S200); - determining gradients or difference values for the sampled measurement values (S300); - ascertaining a minimum or minima for the determined gradients or differential values (S500); - generating a regression model for the determined gradients or differential values and deriving at least one regression coefficient (S600); - checking and deciding on the basis of the determined minima and the at least one regression coefficient from the regression model whether the output signal (I) of the sensor (1) has settled around a setpoint value within a predefinable tolerance range and the output signal (I) has calmed (S700).