178results about "Multiple fluid pressure valves simultaneous measurement" patented technology

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 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.

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.

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).

A sensor assembly (10) includes a substrate (100) having a first outer surface (112) and a second outer surface (116) opposite the first outer surface (112), a first die (200) attached to the first outer surface (112) and having a first diaphragm (220), a second die (300) attached to the second outer surface (116) and having a second diaphragm (320), and a full-bridge pressure sensor (400) including a plurality of piezoresistive elements (402). A first subset (410) of at least two of the plurality of piezoresistive elements (402) is disposed on or in the first diaphragm (220) and a second subset (420) of at least two of the plurality of piezoresistive elements (402) is disposed on or in the second diaphragm (320).

To provide a piezo-electric measuring device.SOLUTION: A piezoelectric measuring device of the invention comprises a sensor element and a conductor element. The sensor element comprises an operational amplifier comprising an inverting input and an output. The sensor element comprises a feedback capacitor arranged in parallel with the inverting input and the output of the operational amplifier, and a reset switching element arranged in parallel with the inverting input and the output of the operational amplifier. A data acquisition device comprises a measurement cycle circuit configured to provide supply voltage to the sensor element, to switch on the supply voltage to the sensor element before starting of a measurement cycle, and to switch off the supply voltage after completion of the measurement cycle. The sensor element comprises a power-on reset logic designed to detect presence of the supply voltage and to close and reopen the reset switching element if the supply voltage is present before the starting of the measurement cycle.SELECTED DRAWING: Figure 1

The application provides a liquid metal flow pressure and differential pressure measuring system and measuring method, which comprises a liquid metal loop (9), a first valve (1), a pressure lead pipe (4), a liquid storage pipe (5), a second valve (2), a third valve (3), an oil injection pipe (6), a bend pipe (7) and a pressure transmitter (8). The liquid metal loop (9) is connected with one end of the first valve (1). The other end of the first valve (1) is connected with the liquid storage tank (5) through the pressure lead pipe (4). The liquid storage tank (5) is connected with one end of the second valve (2). The other end of the second valve (2) is connected with one end of the third valve (3) and the pressure transmitter (8) through the bend pipe (7) respectively. The other end of the third valve (3) is connected with the oil injection pipe (6).

The application discloses a kind of monitoring instruments, including outer probe rod, pressure-resistant cabin, baffle, differential pressure sensor and temperature sensor;Baffle is arranged in the inside of the outer probe rod, baffle is used to divide the internal cavity of outer probe rod into first cavity and second cavity, and outer probe rod is used to insert seabed deposit;Pressure-resistant cabin is arranged at the top of outer probe rod, and circuit board is arranged in the inside of pressure-resistant cabin, differential pressure sensor is arranged in first cavity and is connected with circuit board, temperature sensor is arranged in second cavity and is connected with circuit board, differential pressure sensor is used to output differential pressure signal, and temperature sensor is used to output temperature signal;Circuit board is used to monitor seabed deposit according to differential pressure signal and temperature signal.The monitoring instrument provided by the application can realize differential pressure monitoring.

The present application relates to the field of instruments and process measurement technology, in particular to a multi-range pressure gauge adaptive switching system and method based on time sequence feature perception, the system comprising a data acquisition module that generates a smooth pressure time sequence signal in real time; a time sequence feature perception module that receives the smooth pressure time sequence signal and generates a pressure prediction trend signal for a future short time window based on pressure change trend characteristics; an adaptive decision module that compares the pressure prediction trend signal with a preset current range threshold range; a switching execution module that responds to a pre-switching trigger signal when a switching lock signal is in an unlocked state and outputs to a multi-range sensor group to complete switching of a working channel; and a data fusion module that performs weighted fusion processing on two output signals according to a switching process state signal provided by the switching execution module. The present application can solve the problem of switching lag in existing pressure measurement systems when facing pressure transient working conditions.

The utility model discloses a pipeline pump transmission performance testing device, which belongs to the related technical field of pipeline pumps and comprises a pump body, an input connector and an output connector, the input connector and the output connector are communicated and connected with the pump body, a first connecting pipeline is mounted on one side of the input connector, and a second connecting pipeline is mounted on the other side of the output connector. A second connecting pipeline is installed at the end of the output connector, a valve seat is fixedly connected to the end, away from the pump body, of the first connecting pipeline, a valve frame is installed at the valve seat, a servo motor is installed at the top end of the valve frame, and the power output end of the servo motor is connected with a valve rod through a coupler. The valve rod penetrates through the valve seat and extends to the inner side of the first connecting pipeline, the flow of the first connecting pipeline can be checked in real time through the flow meter according to the opening degree of the valve plate, and the pressure difference between the first connecting pipeline and the second connecting pipeline can be observed through the pressure meter. The larger the pressure difference value is, the better the transmission performance of the pump body is.

Disclosed example pressure sensors include: a first body defining a reference pressure cavity; a second body defining a measured pressure cavity and having an inlet configured to receive a fluid; a diaphragm between the reference pressure cavity and the measured pressure cavity, the diaphragm comprising Havar® alloy and having a thickness of 0.010 inches or less; an electrode separated from the diaphragm by a gap to form a capacitance between the electrode and the diaphragm; and measurement circuitry configured to determine a pressure in the measured pressure cavity based on the capacitance.

The present invention discloses a device and method for detecting tunnel wind pressure. The device comprises: a first dynamic pressure sensor, a second dynamic pressure sensor, a static pressure sensor, and a data processing device; the first dynamic pressure sensor, the second dynamic pressure sensor, and the static pressure sensor are all connected to the data processing device; the first dynamic pressure sensor is located in a tunnel wind pressure detection area; the second dynamic pressure sensor is located in a detection area adjacent to the tunnel wind pressure detection area and free of airflow disturbances; the static pressure sensor is located in the tunnel wind pressure detection area; the first dynamic pressure sensor is used to detect the tunnel wind pressure value; the second dynamic pressure sensor is used to detect the tunnel noise and vibration interference value; the static pressure sensor is used to detect the tunnel static pressure value; and the data processing device is used to calculate the actual value of the tunnel wind pressure. The present invention can improve the accuracy of tunnel wind pressure detection.