326results about "Multiple fluid pressure valves simultaneous measurement" patented technology

The present invention relates to a multi-region collaborative control method and device for a high-precision pressure sensor array. The method: based on a first collaborative sampling parameter, data is collected from multiple sensor units in a pressure sensor array to obtain a pre-processed pressure data set and a sensor unit spatial position matrix; a spatial weighted pressure covariance matrix is ​​constructed; eigenvalue decomposition and information entropy calculation are performed, and the number of target pressure points is determined according to the minimum description length criterion and the information gain ratio; a pressure feature subspace and a local perception domain are constructed; the pre-processed pressure data set is projected onto the pressure feature subspace to generate a sensor unit state data set; a multi-layer attention encoder is input for processing, and the first collaborative sampling parameter of the pressure sensor array is adjusted to obtain a second collaborative sampling parameter. The implementation of the present invention improves the system's response sensitivity to local pressure changes, thereby realizing multi-region collaborative control of pressure sensing.

The invention relates to the technical field of gate groove measurement, in particular to a dam gate groove vertical plane measurement system and method based on an intelligent sensor, and the method comprises the steps: collecting a vertical plane image, vertical plane overflowing velocity data, vertical plane water level data, vertical plane height data and vertical plane sealing pressure data of a gate groove; extracting corrosion pit data in the vertical plane image and evaluating the flatness of the vertical plane based on the corrosion pit data; evaluating the vertical plane wetting-drying alternation influence degree based on the vertical plane water level data, and obtaining the vertical plane erosion degree by combining the vertical plane flatness; and integrating the vertical surface erosion degree and the vertical surface sealing pressure data to pre-estimate the gate leakproofness, and performing gate leakproofness early warning according to a gate leakproofness pre-estimation result. According to the method, the scientificity and the accuracy of gate leakproofness evaluation are improved by quantifying the vertical plane flatness of the gate groove of the gate and the influence of the vertical plane dry-wet alternation period on the vertical plane erosion degree.

The invention discloses hydraulic power plant civil engineering pressure pipeline monitoring equipment, and relates to the technical field of pressure pipeline monitoring. The problem that monitoring is not comprehensive enough due to the fact that monitoring points are relatively fixed is solved. The device specifically comprises a top plate, fixing rings are fixedly connected to the two ends of the top plate, clamping mechanisms are arranged on the inner sides of the fixing rings, supporting plates are fixedly connected to the outer walls of the four corners of the bottom of the top plate, the bottoms of every two supporting plates are fixedly connected with the same base, and a rotating mechanism is arranged on one side of the middle of the top plate; a reciprocating moving mechanism is arranged on one side of the rotating mechanism, the rotating mechanism comprises a second motor, driving teeth, a first guide ring, a second guide ring, a large gear ring and a monitoring head, one side of the bottom of the second motor is slidably connected to the inner side of the base, and the driving teeth are connected to the output end of the second motor through threads. According to the pressure pipeline monitoring device, the defects of traditional fixed monitoring are overcome, multi-point monitoring on the surface of the pressure pipeline is promoted, the monitoring efficiency of the pressure pipeline is improved, and the monitoring quality is guaranteed.

The invention discloses a high-linearity dynamic and static pressure flexible sensor based on Gaussian height distribution. The high-linearity dynamic and static pressure flexible sensor comprises a packaging layer, an upper electrode layer, a piezoelectric layer, a common electrode layer, an insulating layer, a lower electrode layer and a substrate layer which are sequentially stacked from top to bottom, the piezoelectric layer comprises a plurality of PVDF micro-columns, the top ends of the PVDF micro-columns are fixedly connected with the upper electrode layer, the bottom ends of the PVDF micro-columns are provided with micro-electrode layers, and the height of the PVDF micro-columns is of a Gaussian distribution structure from the center to the periphery; the common electrode layer is provided with a plurality of micro-column through holes which are completely overlapped with the PVDF micro-columns; the output leads of the upper electrode layer and the common electrode layer output piezoelectric signals corresponding to dynamic pressure, and the output leads of the common electrode layer and the lower electrode layer output capacitance signals corresponding to static pressure. According to the invention, the dynamic pressure is measured by using the piezoelectricity of PVDF, synchronous measurement of static pressure is realized through a Gaussian distribution structure of a plurality of PVDF micro-columns, and high-sensitivity and high-linearity output of dynamic and static pressure measurement signals is realized.

A sensing device includes a body having a first chamber, a second chamber, and a liquid path which are filled with a liquid, the liquid path communicates with the second chamber, a pressure difference detection chip installed in the first chamber, and a pressure detection chip installed in the first chamber. The pressure difference detection chip seals an opening of the liquid path disposed on a bottom surface of the first chamber. The pressure difference detection chip detects a liquid pressure difference between the first chamber and the second chamber. The pressure detection chip detects a liquid pressure in the first chamber.

The invention discloses an automatic switching metering method suitable for multiple ranges of a pressure gauge, and the method comprises the steps: S1, obtaining the information of a current pressure measurement environment, inputting a pressure range prediction model, and outputting an initial recommended range; s2, selecting a measurement parameter of a corresponding measuring range, and performing preliminary measurement on the pressure at the initial sampling frequency to obtain a preliminary measurement pressure value; s3, comparing the preliminarily measured pressure value with the upper range limit and the lower range limit of the selected range, and judging that a higher / lower range needs to be switched; s4, the calibration coefficient of the range to be switched is obtained and corrected, and a corrected pressure measurement value is obtained; s5, dynamically adjusting the sampling frequency; and S6, the pressure change rate is monitored in real time, and the measuring range capable of covering the current pressure change range is preferentially selected for measurement. According to the invention, multi-range intelligent switching of the pressure gauge is realized, and the measurement precision and response speed in the full-range range are improved.

The compressor air inlet pressure stabilizing device comprises a compressor, and the compressor is provided with an air inlet; the compressor air inlet pressure stabilizing device is characterized by further comprising an air inlet pipeline, a regulation and control assembly, a Venturi tube, a first flow monitor, a second flow monitor and a central control module; the air outlet end of the air inlet pipeline is communicated with the air inlet; the regulation and control assembly is arranged on the air inlet pipeline and located at the air inlet. The regulation and control assembly has a degree of freedom of moving in the radial direction of the air inlet pipeline and is used for opening and closing the air inlet; the venturi tube is coaxially arranged in the gas inlet pipeline; the first flow monitor is arranged at the air inlet end of the air inlet pipeline; the second flow monitor is arranged between the regulation and control assembly and the air inlet; the central control module is electrically connected with the first flow monitor, the second flow monitor and a power source of the regulation and control assembly. The method has the technical effects of automatically adjusting the air pressure before entering the compressor and prolonging the service life of the compressor.

The invention provides a sewage pipeline clogging recognition method and system based on pressure sensors, the system comprises a sewage pipeline, a plurality of pressure sensors are arranged at the bottom in the sewage pipeline at intervals, and power and signal transmission lines of the pressure sensors penetrate out through threading holes under the pipeline and are led to the top of the pipeline along the outer wall of the pipeline. A gap between the sensor and the threading hole is sealed by a waterstop tape, a steel sleeve is arranged on the outer side of the sewage pipeline, and a gap between the sewage pipeline and the steel sleeve is filled with rubber; the power supply and the signal transmission line of each pressure sensor are connected outside the pipeline and then are connected to the wireless data transmission module, and the wireless data transmission module receives a pressure measurement signal and then uploads the pressure measurement signal to a far-end data management center through an operator network. The pressure sensor is arranged in the bottom of the sewage pipeline in advance, a liquid level meter does not need to be arranged, a sewage inspection well does not need to be built, and the pipe network clogging condition is rapidly recognized and the clogged pipe section is locked by comparing and analyzing the upstream and downstream water flow static pressure values of the pipe section.

The invention relates to the related technical field of brake detection, in particular to a brake chassis and brake system synchronous detection device and method, and the device comprises a bearing platform, a hydraulic lifting platform, a bearing base, a butt joint module, a transition module, a detection module and a display module. The roller is in contact with a tire, movement of the tire is transmitted to the transition module, and synchronism detection is performed by the balance pushing assembly and the working assembly in the detection module. When left and right tires brake asynchronously, the balance plate rotates in an unbalanced manner, the hydraulic assembly is triggered, and the brake time difference of the left and right tires is visually displayed through the pressure instrument, so that problems are found and brake synchronism is ensured. The whole structure is ingenious, synchronism detection is achieved, the defect that in the prior art, braking asynchronization cannot be recognized is effectively overcome, and powerful support is provided for guaranteeing driving safety, improving braking efficiency and prolonging the service life of tires.

The embodiment of the utility model provides an integrated detection device, a control system and an air conditioning system. The integrated detection device comprises: a main body provided with a plurality of mutually independent cavities; the plurality of pipe bodies are communicated with the plurality of cavities in a one-to-one correspondence manner, and the plurality of pipe bodies are used for communicating the plurality of to-be-detected fluid pipelines with the corresponding cavities; the plurality of pressure sensitive elements are in one-to-one correspondence with the plurality of cavities, and the pressure sensitive elements are in contact with the to-be-measured fluid in the corresponding cavities and are used for sensing the pressure of the to-be-measured fluid and generating corresponding pressure electric signals; the conditioning module is electrically connected with the multiple pressure sensitive elements and used for processing the pressure electric signals generated by the pressure sensitive elements and outputting multiple detection signals, the multiple detection signals correspond to the multiple pressure sensitive elements in a one-to-one mode, and the detection signals are signals obtained after the pressure electric signals generated by the pressure sensitive elements are processed. According to the integrated detection device, the product cost is reduced, and the assembly efficiency is improved.

The invention relates to the technical field of instrument and process measurement, in particular to a multi-range pressure gauge self-adaptive switching system and method based on time sequence feature perception, and the system comprises a data collection module which generates a smooth pressure time sequence signal in real time; the time sequence feature sensing module receives the smooth pressure time sequence signal and generates a pressure prediction trend signal of a future short-time window based on the pressure change trend feature; the self-adaptive decision-making module compares the pressure prediction trend signal with a preset current measuring range threshold value range; the switching execution module responds to the pre-switching trigger signal when the switching locking signal is in an unlocking state, and outputs the pre-switching trigger signal to the multi-range sensor group to complete switching of working channels; and the data fusion module performs weighted fusion processing on the two paths of output signals according to the switching process state signal provided by the switching execution module. According to the invention, the problem of switching lag of an existing pressure measurement system in the face of a pressure transient working condition can be solved.

Disclosed example pressure transducers include: a pressure housing comprising a first cavity; a fluid input line configured to provide a fluid to the first cavity; a first pressure measurement assembly having a first type and configured to output a first measurement signal based on a pressure of the fluid in the first cavity; a second pressure measurement assembly having a second type and configured to output a second measurement signal based on the pressure of the fluid in the first cavity; and a controller configured to determine the pressure of the fluid in the first cavity based on the first measurement signal when the pressure is within a first range and determine the pressure of the fluid in the first cavity based on the second measurement signal when the pressure is within a second range.

The invention belongs to the technical field of atmosphere data detection, and particularly discloses a helicopter distributed three-axis atmosphere data measuring device which comprises a left three-axis atmosphere measuring assembly and a right three-axis atmosphere measuring assembly which are installed on the two sides of a nose and are the same in structure. Each airspeed tube consists of a rotary airspeed tube and an electronic component; the rotary airspeed tube and the electronic component are electrically connected through the fuselage skin opening; the rotating airspeed tubes are mounted outside skins on two sides of the machine head and used for sensing total pressure, static pressure, local attack angle and local sideslip angle of the synthetic gas flow in real time; the electronic component is arranged in the machine head skin and used for collecting the total pressure, the static pressure, the local attack angle, the local sideslip angle and the atmospheric temperature of the synthetic gas flow, conducting parameter calculation and outputting atmospheric parameters. According to the invention, the problem that a centralized atmosphere data system, a distributed atmosphere data system and a three-axis atmosphere data system have different restrictions on the use of a helicopter at present is solved.

The invention particularly relates to a nuclear power station constant flow working condition pump performance evaluation method, which comprises the following steps of: obtaining an inlet pressure value and an outlet pressure value of a constant flow working condition pump in a previous time period, and calculating an inlet and outlet pressure correlation coefficient of the constant flow working condition pump in the previous time period; an inlet pressure value and an actual outlet pressure value of the constant-flow working condition pump in the next time period are obtained, and an inlet and outlet pressure correlation coefficient of the constant-flow working condition pump in the next time period is calculated; the inlet and outlet pressure correlation coefficient of the constant-flow working condition pump in the previous time period is compared with the inlet and outlet pressure correlation coefficient of the constant-flow working condition pump in the next time period, and the performance index of the constant-flow working condition pump is obtained; and the performance change trend of the constant-flow working condition pump is judged according to the performance indexes of the constant-flow working condition pump. The invention further relates to a nuclear power station constant flow working condition pump performance evaluation device, computer equipment and a storage medium. According to the invention, low-cost, high-efficiency and high-precision detection of the constant-flow working condition pump performance is realized.

The invention relates to a pressure sensor module comprising: a sensor structure arrangement which is arranged to measure a pressure, wherein at least two different measuring ranges are defined using the sensor structure arrangement, a determination device which is configured to determine an ambient pressure of the pressure sensor module based on a pressure measurement by the sensor structure arrangement in at least one of the at least two measuring areas. The invention relates to a method for measuring a pressure, a computer program and a machine-readable storage medium.

A multi-fault diagnosis method and device for an integrated hair collector relates to the technical field of swimming pool water treatment.The method comprises the steps that negative pressure P1, P2, P3 and P4 of a water inlet, a hair filtering section outlet and an ultraviolet disinfection section inlet and outlet are collected in real time; calculating a filtration pressure drop delta P1 and a disinfection pressure drop delta P2; whether P1 is smaller than a safety threshold value or not is judged to trigger anti-adsorption emergency shutdown; if not, based on the comparison of delta P1 and delta P2 with respective cleaning reference values, accurately distinguishing and diagnosing the blocking fault of the hair filtering section or the blocking fault of the interior of the ultraviolet disinfection section; and if both are normal, judging the efficiency of the ultraviolet lamp tube based on the radiation intensity. Secondly, the equipment comprises a corresponding negative pressure sensor, a controller and an executing mechanism, and an integrated built-in scraping type cleaning assembly is adopted in the ultraviolet disinfection section. According to the invention, intelligent identification and directional maintenance of multi-stage faults are realized, and the safety, the energy efficiency and the maintenance convenience are improved.

The application discloses a kind of integrated hair concentrator multi-fault diagnosis method and equipment, relating to swimming pool water treatment technical field, wherein the method comprises: real-time acquisition inlet, hair filter section outlet, ultraviolet disinfection section import and outlet negative pressure P1,P2,P3 and P4;Calculate filtration pressure drop ΔP1 and disinfection pressure drop ΔP2;And first judge whether P1 is less than safety threshold to trigger anti-adsorption emergency stop;If not, based on the comparison of ΔP1 and ΔP2 and their respective cleaning reference value, accurately distinguish and diagnose hair filter section blockage or ultraviolet disinfection section internal blockage fault;If both are normal, based on radiation intensity, judge the efficiency of ultraviolet lamp tube.Secondly, the equipment includes corresponding negative pressure sensor, controller and actuator, wherein the ultraviolet disinfection section uses integrated built-in scraping type cleaning component.The application realizes the intelligent identification and directional maintenance of multi-stage fault, improves safety, energy efficiency and maintenance convenience.

A body of a sensor includes a wafer having a cavity and a membrane deflectable into the cavity under an applied force. The membrane has a first section and a second section. The first section of the membrane is more deflectable than the second section in a first range of the applied force and the second section is more deflectable than the first section in a second range of the applied force that is different than the first range.

The application discloses a head-mounted device clamping force measuring system and method, which comprises a pressure sensing module and a measuring module, the measuring module comprises at least one set of measuring devices and at least one air guide device, the measuring device comprises at least one hollow compressible unit, the measuring device is used for discharging gas when the volume is deformed, the first end of the air guide device is communicated with the measuring device, the second end of the air guide device is communicated with the pressure sensing module, and the air guide device is used for transmitting the gas to the pressure sensing module, and the pressure sensing module is used for determining the clamping force of the head-mounted device according to the pressure value of the gas, at least one hollow compressible unit in the technical scheme discharges the gas through the first end of the air guide device when being extruded, and then the volume change of the measuring device is converted into the pressure change, the clamping force is determined through the pressure sensing module communicated with the second end of the air guide device, and the measurement result is more accurate.

The invention relates to a pressure sensor (10) for measuring ambient pressure, comprising a first pressure measuring element (12) with a first cavity (16) and at least one first deflection element (20) spanning at least section by section over the first cavity (16) and deflectable in a normal direction (18) depending on the ambient pressure, a second pressure measuring element (14) with a second cavity (44) and at least one second deflection element (46) spanning at least section by section over the second cavity (44) and deflectable in the normal direction (18) depending on the ambient pressure, wherein the second deflection element (46) comprises the first pressure measuring element (12) and a peripheral deflection region (48) adjacent to the first pressure measuring element (12), wherein the second cavity (44) overlaps the first cavity (16) at least section by section with respect to the normal direction (18),wherein the first deflection element (20) has a smaller material thickness than the edge-side deflection area (48).

The invention relates to a microsensor (10) for measuring a physical quantity (14), comprising a first measuring element (16) with a first measuring characteristic (C1) and a second measuring element (56) with a second measuring characteristic (C2), which is mechanically delimited and offset from the first measuring area (54) by means of a second measuring characteristic (C2), and a second measuring element (18) with a micromechanical first deflection element (18) which is deflectable depending on the quantity (14), and a second measuring element (28) which is measurable in a third measuring area (52) with a third measuring characteristic (C3), wherein the third measuring area (52) overlaps a transition (53) between the first and second measuring areas (54, 56) and forms a first overlap area (58) with the first measuring area (54) and a second overlap area (60) with the second measuring area (56).wherein the measured quantity (14) present at least at the transition (53) can be measured by measuring the second measuring element (28) based on the third measuring characteristic (C3). Furthermore, the invention relates to a method for measurement and a method for sensor condition monitoring.

The invention relates to a method and device for obtaining grouting pressure distribution, a storage medium and electronic equipment, and the method comprises the steps: determining a monitoring hole for monitoring a grouting hole in a target grouting region according to a monitoring layout strategy; a grouting pressure sensor, a soil pressure sensor and a pore water pressure sensor are respectively arranged at different depths of the monitoring hole; the monitoring holes are backfilled, and grout is injected into the grouting holes in a segmented mode according to the grouting technology; in the grout injection process, a grouting pressure sensor, a soil pressure sensor and a pore water pressure sensor are synchronously triggered to collect grouting pressure data, soil pressure data and pore water pressure data respectively, and segmented grouting parameters are adjusted based on the soil pressure data and a soil pressure threshold value as well as the pore water pressure data and a stabilization time threshold value; a pressure diffusion quantitative model is constructed on the basis of synchronously collected grouting pressure data, soil pressure data and pore water pressure data, and grouting pressure distribution is obtained on the basis of the constructed pressure diffusion quantitative model. And the grouting efficiency can be improved.

An integrated detection apparatus, comprising: a main body (11), provided with a plurality of cavities independent of each other; a plurality of fluid channels (12), one end of each fluid channel (12) being in communication with one of the plurality of cavities, and the other end of each fluid channel (12) being in communication with one of a plurality of fluid pipes to be measured; a plurality of pressure measurement elements (13), each cavity being provided with at least one pressure measurement element (13), and the pressure measurement element (13) sensing the pressure of said corresponding fluid pipe and generating a corresponding pressure electrical signal; and a signal conditioning module (14), separately electrically connected to the plurality of pressure measurement elements (13), wherein the signal conditioning module (14) receives the plurality of pressure electrical signals generated by the plurality of pressure measurement elements (13) and outputs a plurality of measurement signals, and the measurement signals are signals obtained by processing the pressure electrical signals generated by the pressure measurement elements (13). The integrated detection apparatus reduces product costs and improves assembly efficiency. Further provided are a control system and an air conditioning system.

Matching content to third-party digital assistant actions using a bit vector is provided. A system receives an application with voice-assistant compatible actions. The system identifies the actions in the application. The system identifies content items provided by third-party computing devices. The system generates, via a machine learning model and performance data for the content items, bit vectors or the actions. The system selects, responsive to a request for content from a client device that executes an action of the application, a content item based on the bit vector that corresponds to the action.

The invention relates to the technical field of shock absorbers, and particularly discloses an oil pressure and air pressure monitoring method and system for a nitrogen shock absorber. The monitoring method comprises the following steps: injecting a first volume of oil into a recovery side, injecting a second volume of oil into a compression side, and filling a third volume of gas into a gas side; if the sealing performance of the nitrogen shock absorber is qualified, the recovery side, the compression side and the gas side are monitored through the collecting device; if the collecting device operates normally, the nitrogen damper is clamped on a power indicating device, the nitrogen damper is operated, and the oil pressure of the recovery side, the oil pressure of the compression side and the air pressure of the gas side are recorded; and adjusting the nitrogen shock absorber to a to-be-tested working condition which is not tested, returning to the step of immersing the nitrogen shock absorber in the water until the temperature of the nitrogen shock absorber is the same as the environment temperature, and stopping the power indicating device and dismounting the nitrogen shock absorber from the power indicating device until all to-be-tested working conditions are tested. The monitoring method is used for monitoring the pressure states of multiple parts in the nitrogen shock absorber.

A sensor die includes a diaphragm having a first membrane and a second membrane positioned within the first membrane. The first membrane is deflectable in proportion with a differential pressure between a first side of the diaphragm and a second side of the diaphragm opposite the first side. The second membrane is deflectable simultaneously with the first membrane and in proportion with an absolute pressure on the first side of the diaphragm.

The present application provides a conference management method, a server, and a conference management system, and relates to the field of computer technology. The present application receives multiple participant information sent by a first client, binds each participant information to a corresponding electronic table card identifier, and the electronic table card corresponding to each electronic table card identifier also corresponds one-to-one with a microphone, receives the voice information sent by the target microphone, determines the target participant information according to the target electronic table card identifier corresponding to the target microphone, and generates a conference document according to the voice information and the target participant information. According to the one-to-one correspondence between the participant information, the electronic table card, and the microphone, the target participant information corresponding to the voice information is determined, and a conference document is generated according to the target participant information and the voice information, without the need for manual sorting, thereby improving sorting efficiency.

This application relates to a low-noise centrifugal pump and a pressure pulsation detection method, belonging to the technical field of water pumps. It includes a pump body, and the pump body is provided with an impeller chamber and a water inlet chamber. The water inlet chamber includes a water inlet flow channel and a connecting flow channel, and the connecting flow channel is connected to the impeller chamber. The boundary of the connecting flow channel is curved. The water inlet chamber includes several cross-sections that are circular. Let the smallest circular cross-section be S1 and the largest circular cross-section be S2, where S2 ≥ S1 ≥ 0.9S2. This application has the advantage of being able to reduce noise.

The present invention provides a silo capable of automatically collecting dust and a dry desulfurization system. The silo capable of automatically collecting dust comprises a silo body (10) and a dust collection system (20). The dust collection system (20) comprises a dust measuring instrument (21), a control unit (22) and a dust discharge pipe (23). The dust measuring instrument (21) can measure the dust concentration in the silo body (10). The inlet end of the dust discharge pipe (23) is connected to the silo body (10). A regulating valve (24) is provided on the dust discharge pipe (23). The control unit (22) can control the opening of the regulating valve (24) according to the dust concentration measured by the dust measuring instrument (21). A constant negative pressure environment can be established in the silo capable of automatically collecting dust, which completely solves the problem of dust leakage in the storage silo during the process of storing and unloading materials, and the dust material can also be further utilized.

The invention relates to a piezoelectric measuring device (100) comprising a sensor element (10) which generates a measurement signal (M) for a pressure to be measured, a conductor element (13) for deriving the measurement signal (M) to a data acquisition device (12), which data acquisition device (12) is configured to acquire and evaluate the derived measurement signal (M), wherein the sensor element (10) comprises an operational amplifier (20) which has an inverting input and an output, a feedback capacitor (22) which is arranged in parallel to the inverting input and output of the operational amplifier (20), and a reset switching element (27) arranged in parallel to the inverting input and output of the operational amplifier (20), wherein the data acquisition device (12) is further configured toto provide an electrical supply voltage (U) for the sensor element (10), wherein the data acquisition device (12) has a measurement cycle circuit (35) configured to switch on the electrical supply voltage (U) for the sensor element (10) before the start of a measurement cycle and to switch it off after completion of the measurement cycle; and that the sensor element (10) has a power-on reset logic (25, 26) configured to detect the presence of the electrical supply voltage (U) and, if the electrical supply voltage (U) is present before the start of a measurement cycle, closes and reopens the reset switching element (27).