85results about "Fluid pressure measurement by mechanical elements" patented technology

A fibre-optic sensor for measuring a physical quantity, such as a pressure, force, acceleration or tilt, includes an optical fibre having a measurement section for measuring a strain in the fibre, and first and second structural members. The optical fibre is connected to a first fibre connection section of the first structural member and to a second fibre connection section of the second structural member. The first and second connection sections are arranged on opposite sides of the measurement section, such that at least the measurement section is suspended between the first and second fibre connection sections. At least one of the structural members is movable relative to the other in dependence of the physical quantity that is measured. The structural members are made from materials having different coefficients of thermal expansion such that a temperature induced strain in said optical fibre due to a temperature change is reduced.

To provide a communication device or a water meter capable of providing dynamic water pressure.SOLUTION: Provided is a communication device 100 including an acquisition unit 175 for acquiring a flow rate from a water meter 200 or a slave device 100B, a communication unit 160 for communicating with a center 300, and a control unit 110 for calculating dynamic water pressure from the flow rate and transmitting the dynamic water pressure to the center via the communication unit.SELECTED DRAWING: Figure 2

The invention discloses an analytical device for determining the concentration of an analyte in a liquid sample, which comprises a metering device, in particular a pump, for metering the liquid sample into a high-temperature digestion device for digesting the liquid sample and forming a gas mixture, wherein the high-temperature digestion device has a reaction vessel with a liquid inlet for the liquid sample and a gas supply for supplying a carrier gas, and is connected to an analysis chamber via a gas outlet; wherein, during operation of the device, a gas flow of a carrier gas forms between the gas inlet and the analysis chamber; wherein, in the direction of the gas flow, a pressure sensor is arranged upstream of the analysis chamber within the gas supply, wherein the pressure sensor is coupled to a control unit for further processing of the pressure signals output by the pressure sensor;wherein a first flow sensor is arranged in the direction of the gas flow upstream of the analysis chamber, in particular within the gas supply for the supply of the carrier gas, wherein the first flow sensor is coupled to the control unit for further processing of the flow signals output by the flow sensor; and wherein a second flow sensor is arranged in the direction of the gas flow downstream of the analysis chamber, wherein the second flow sensor is coupled to the control unit for further processing of the flow signals output by the flow sensor.

Impact testing apparatuses are disclosed which simulate and measure various impact-related events associated with the operation of a drug delivery device. The impact testing apparatus may include an imapctor configured to simulate a plunger rod of the drug delivery device, and a guide sleeve configured to receive a syringe corresponding to the drug delivery device. The syringe may have a proximal end, a distal end defining an outlet, and an interior chamber extending between the proximal and distal ends and carrying a plunger. Additionally, the impact testing apparatus may include an energy source configured to reduce a distance between the imapctor and the plunger so that the imapctor strikes the plunger. Various sensors may be included to measure characteristics of one or more impacts caused by the impactor. Methods of impact testing a syringe filled with a fluid and carrying a plunger are also disclosed.

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.

A pressure sensor includes a first wafer having a first deflectable diaphragm and a second deflectable diaphragm. The first deflectable diaphragm has a first relationship between deflection and applied pressure, and the second deflectable diaphragm has a second relationship between deflection and applied pressure. The first relationship and the second relationship are different from each other. The second wafer is attached to the first wafer. At least one tensile strain gauge is coupled to the first deflectable diaphragm and at least one compressive strain gauge is coupled to the second deflectable diaphragm. An overvoltage feature is mounted relative to one of the first wafer and the second wafer. The overpressure feature is configured to contact the other of the first wafer and the second wafer during an overpressure condition exceeding a maximum measured pressure of the first deflectable diaphragm and a maximum measured pressure of the second deflectable diaphragm.

The utility model relates to the technical field of low-nitrogen combustors, and provides a low-nitrogen combustor internal pressure detection device which comprises a multilateral lantern ring assembly, a plurality of triangular turning plates and a force detection mechanism, the multilateral lantern ring assembly is fixedly arranged on one side, close to a ventilation pipeline, of a primary air pipe and a secondary air pipe, and the triangular turning plates are arranged on the multilateral lantern ring assembly. The multiple triangular turning plates are rotationally connected to the multilateral lantern ring assembly, the multiple triangular turning plates are arranged in the primary air pipe and surround the primary air pipe in a circumferential mode, the multiple side edge contact strength detection mechanisms of the adjacent triangular turning plates are arranged, and the multiple strength detection mechanisms are fixedly connected to the multilateral lantern ring assembly. By means of the technical scheme, the problem that in the prior art, when airflow flows unstably, the real gas pressure is difficult to measure is solved.

To provide a piezoelectric high-pressure sensor that can measure pressures up to 10 kbar. [Solution] The piezoelectric high-pressure sensor of the present invention comprises a hollow cylindrical housing having a shell and a cavity, a disk-shaped diaphragm having a central region and a peripheral region, and a measuring unit having a measuring element made of piezoelectric material disposed within the cavity. The shell includes mounting means, and the piezoelectric high-pressure sensor can be mounted at the measurement location by the mounting means. The diaphragm receives the pressure to be measured by the central region, transmits this pressure along the longitudinal axis into the measuring unit, and is connected to the shell by the peripheral region through a material bond. The measuring element is rod-shaped, functions according to the piezoelectric transverse effect, and has a length along the longitudinal axis and a cross-sectional area perpendicular to the longitudinal axis, with a length-to-cross-sectional area ratio of 1.0 mm. -1 Based on the above, 1.5mm -1 The following conditions apply, and the shell diameter is 10 mm or less.

The application belongs to the technical field of sensors and particularly relates to a water jet impact sensor and a use method thereof. An LED lamp indication area is arranged on a target plate surface, a pressure sensing unit with a fence type grid node is adopted, cylindrical weights with different masses and different round bottom areas are used to drop and impact the target plate from different heights, the water jet impact target plate is simulated under different pressures, the node pressure information, the node response coordinates and the drop height data of the drop from different heights are used as training data input values, the impact pressure is theoretically calculated, the theoretical calculation impact area is used as an output value, a multi-objective fast non-dominant sorting genetic algorithm model is trained, a database is established for predicting the jet area and the effective jet pressure mean value generated by the impact, prediction values are provided for water jet impact tests at different distances, wavelet threshold processing data in a real test process is checked, and the impact area and the impact pressure mean value in different areas are given.

A measuring system, for a physical variable, includes a housing, a measuring tube having at least one tubular deformation body having a cross-section which is deformed at least partially and which is configured to expand elastically under pressure, two feed sections attached to end sections of the deformation body, two sealing sections for sealingly coupling the measuring system to a process, and two molded support sections to carry the housing. A measuring sensor system measures values of at least one of a stretching or a widening at at least two points on a section of the deformation body. An evaluation unit evaluates measured values of the stretching and widening and outputs them as a measurement signal. The housing at least partially surrounds and stabilizes the measuring tube on an outside and is provided with a vacuum and / or a negative pressure compared to the outside atmosphere.

An exemplary pressure transducer is disclosed that includes an absolute pressure sensor including a fluid input and configured to output a signal representative of the pressure sensed at the fluid input, and an outer insulating housing around the absolute pressure sensor, where a space between the housing and the absolute pressure sensor contains a vacuum pressure.

The present disclosure relates to a sensor device (2) for detecting intracranial pressure, said sensor device (2) comprising a housing (8) defining an interior space (15a; 15b) configured to accommodate a pressure sensing device (9) and an electronic control unit (14) to which said pressure sensing device (9) is connected; and fixation means (7; 2b) cooperating with said housing (8) for mounting said sensor device (2) within a human skull (3), optionally in a permanent manner. Furthermore, said housing (8) has an opening (11) covered by a membrane (12) made of titanium or a similar thin, flexible material, and is configured to generate vibrations in accordance with existing external pressure, said vibrations being transmitted to said pressure sensing device (9). The present invention also relates to a method for detecting intracranial pressure.

To provide a flow detection device capable of improving flow detection accuracy of fluid, and a correction method of the flow detection device.SOLUTION: A flow detection device 1 includes a flow path 10 having a flow wall 11 that expands and contracts according to a pressure change of a fluid flowing inside, a pressure chamber forming portion 20 that forms a pressure chamber 20A covering at least a part of a periphery of the flow wall 11, a first pressure sensor 30 that measures a pressure change of the pressure chamber 20A due to a displacement of the flow wall 11, and a correction device 40 that removes at least a part of noise of an atmosphere pressure included in an output value of the first pressure sensor 30. The correction device 40 includes a second pressure sensor 41 which is disposed outside the pressure chamber 20A and measures the atmosphere pressure, and an arithmetic device 42 which corrects an output value of the first pressure sensor 30 based on the output value of the second pressure sensor 41 delayed by a fixed time.SELECTED DRAWING: Figure 1

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.

This invention relates to the field of pipe blockage detection technology and discloses a pipe blockage detection method for a squeeze-type fluid conveying device, comprising: acquiring at least one response parameter associated with the load state of the squeeze actuator during each squeeze drive cycle; comparing the response parameter with a pre-established normal response model of the squeeze-fluid system; and determining that the fluid pipeline is blocked and triggering a blockage response when the response parameter continuously deviates from the normal response model and meets a preset continuous judgment condition during multiple consecutive squeeze drive cycles. This invention effectively overcomes the problem of strong detection lag in existing technologies by establishing a real-time correlation mechanism between the squeeze action and the pressure change inside the pipe, synchronously acquiring and analyzing pressure signals in each squeeze cycle, thereby achieving dynamic and real-time monitoring of the pipeline status.

A pressure sensor (200) includes a first wafer (202) having a primary deflectable diaphragm (208) and a secondary deflectable diaphragm (210). The primary deflectable diaphragm (208) has a first relationship between applied pressure and deflection, and the second deflectable diaphragm (210) has a second relationship between applied pressure and deflection. The first and second relationships differ from one another. A second wafer (204) is attached to the first wafer (202). At least one tensile strain gauge (214, 216) is coupled to the primary deflectable diaphragm (208) and at least one compressive strain gauge (218, 220) is coupled to the secondary deflectable diaphragm (210). An overpressure feature (222) is mounted relative to one of the first wafer (202) and the second wafer (204). The overpressure feature (222) is configured to contact the other of the first wafer (202) and second wafer (204) during an overpressure condition that exceeds a maximum measurement pressure of the primary deflectable diaphragm (208) and a maximum measurement pressure of the secondary deflectable diaphragm (210).

The present invention relates to an apparatus and a method for controlling water pressure in a water-supply pipe-network block in which remote meter reading and manual meter reading coexist, and in which a consumer equipped with a water-pressure gauge and a consumer equipped only with a water meter instead of the water-pressure gauge also coexist. In the water-supply pipe-network block, the apparatus: for the consumer equipped with a water-pressure gauge, determines a required water pressure using a measured water-pressure value; for the consumer not equipped with a water-pressure gauge, estimates a required water pressure; and controls an output water pressure of a main valve in the block by applying a majority rule to required water pressures.

A pressure measurement device is configured to adjust a gas pressure in an external gas cavity that is fluidly coupled thereto and measure the adjusted gas pressure in the external gas cavity. The pressure measurement device includes a port, a pressure control module, and a gas discharging port. The pressure measurement device is fluidly coupled to the external gas cavity through the port. The pressure control module is coupled to the port through a gas passage and configured to operably provide pressurized gas to the external gas cavity or draw gas from the external gas cavity.

A system for assessing a quality of a fluid process performed on a fluid including one of a fluid aspiration and a fluid dispense is provided. The system includes pump; a probe; a connection, wherein the pump and the probe are attached to the connection and a fluid path is formed between the pump and the probe at least in part by the connection; a pressure sensor in fluid communication with the fluid path and configured to sense pressures of the pump during the fluid process, wherein a pressure measurement data comprises the sensed pressures of the pump during the fluid process; a processor; and a memory. The memory comprising instructions that are executed by the processor to cause the processor to receive pressure measurement data during the fluid process, and determine, using a trained machine learning algorithm, the quality of the fluid process.

Differential density system and method. A differential pressure transmitter measures a pressure difference between first and second pressure sensing locations. A reference vessel in fluid communication with the first pressure sensing location contains a reference fluid and a sample vessel in fluid communication with the second pressure sensing location contains a sample fluid. The reference fluid is in a first column above the first pressure sensing location and the sample fluid is in a second column above the second pressure sensing location. The second column is of substantially equal height as the first column. A value of total dissolved solids (TDS) in the sample fluid is determined based on the pressure difference.

The present invention relates to a method and system for photomechanics, the system comprising a system control module, an image acquisition module and a processor module: the image acquisition module is connected to the system control module and the processor module respectively, the system control module controls the image acquisition module to acquire multiple sets of image sequences with different spatial resolutions, the image acquisition module sends the image sequences to the processor module, the processor module receives the image sequences, the processor module is used to accurately locate the acquisition time of each image in the image sequence, and uses the optical flow method to analyze the image sequence to obtain deformation field data, thereby solving the problem of insufficient spatial resolution of the acquired images in the high-speed image acquisition system.

The utility model discloses a dam osmotic pressure monitoring device which comprises a solar module, a battery, an excitation sending module, a main control module, an L0RA module, a response receiving module, a real-time clock module and a storage module. The solar module is electrically connected with the battery, the battery is electrically connected with the main control module, the main control module is electrically connected with the excitation sending module, the response receiving module, the vibrating wire sensor, the real-time clock module, the storage module and the LoRa module, and the LoRa module is in wireless communication with the concentrator. According to the dam osmotic pressure monitoring device, detected data are collected in a LoRa wireless transmission mode, and the construction and installation convenience of the dam osmotic pressure monitoring device is improved.

A fault detection and alerting system, such as for detecting and visually alerting of an electrical fault within a tank, includes a pressure sensor and a visual alerting apparatus. The pressure sensor is configured for coupling to a pressure vent port or a pressure relief valve of the tank and produces / generates output signals corresponding to amounts of fluid pressure detected at the sensor's input. The visual alerting apparatus is operable to emit light when the pressure sensor output signal or its rate of change meets or exceeds a respective threshold, which may be preset or remotely configurable. In some embodiments, the system also includes a control device, where the visual alerting apparatus is positioned between the control device and the pressor sensor. When included, the control device analyzes the pressure sensor output signals and, when appropriate, provides one or more control signals to activate the visual alerting apparatus.

A system (100) for detecting damage to a dust boot (102) in a vehicle comprises a pressure sensor (104) functionally coupled to an interior of the dust boot (102), configured to detect pressure fluctuations within the dust boot due to the movement of one or more vehicle parts located therein. An electronic control unit (ECU) (106) is configured to receive a signal from the pressure sensor (104) corresponding to the pressure fluctuation within the dust boot (102) and determine whether the received signal indicates the absence of a pressure fluctuation within the dust boot (102). If the ECU (106) determines that the received signal indicates the absence of a pressure fluctuation within the dust boot (102), the ECU (106) outputs a warning signal indicating damage to the dust boot (102).

Lighting device, comprising: - a light source (2) for producing light, - a control electronics unit (3) for controlling the light source (2), at least one radar sensor (4) for detecting presence information, wherein the radar sensor (4) is equipped with at least one RF emitter and at least one RF receiver, and wherein the RF emitter and the RF receiver are configured to be used as a communication channel for transmitting data to other lighting devices, and wherein the control electronics unit (3) is configured to control the light source (2) based on the presence information and / or on the transmitted data, wherein the lighting device comprises a sensor for detecting at least one sensor signal, wherein the sensor includes an air pressure sensor for detecting a current air pressure, and wherein the control electronics unit is configured to determine the air pressure value via the air pressure sensor of the sensor, to transmit it to another lighting device (1') orto receive from the other lighting device (1') and to identify the relative position of the lighting devices (1) and (1') to each other by comparing the two air pressure values, based on the comparison of the air pressure determined by the user and the air pressure transmitted.

The systems and processes described herein can be used to determine pressures and flowrates in a filter system that includes one or more filters. The systems and processes described herein can be used to determine a performance of the one or more filters. In one or more examples, machine learning computational models can be generated that determine when maintenance is to be performed with respect to the one or more filters. Additionally, machine learning computational models can simulate the operation of the filter system based on input obtained via one or more user interfaces.

The utility model discloses a beryllium window device for protecting a detector of a fluorescence analyzer with high precision. The vacuum pressure gauge is arranged at a first port of the bottom bracket; one end of the flange is connected with the second port of the bottom bracket, and the other end of the flange is connected with the cavity of the analyzer detector; one end of the electromagnetic valve is connected with a third port of the five-way valve, and the other end of the electromagnetic valve is connected with a three-way valve; one end of the air exhaust proportional valve is connected with a fourth port of the five-way joint, and the other end of the air exhaust proportional valve is connected to the three-way joint through a hose; the rest end of the tee joint is connected with the vacuum pump; the deflation proportional valve is connected with a fifth port of the five-way valve; the air exhaust caliber controlled by the electromagnetic valve is larger than the air exhaust caliber controlled by the air exhaust proportional valve and the air exhaust caliber controlled by the air exhaust proportional valve.

The pressure gauge plunger for 3D printing platforms is applicable in various 3D printing fields (tissue bioprinting as well as food, pharmaceutical and ceramic industries). Its usefulness is based on its ability to continuously control the applied pressure throughout the entire printing process thanks to the plunger mechanism. It therefore allows improved quality and on-the-spot detection of errors, allowing corrective actions to be applied during the process. Using a stress gauge, the pressure values ​​exerted by the printing platform components on the plunger (and thus on the extruded mass) are obtained. This continuous control allows profiling of the printed semi-solid mass, allows the most suitable printing parameters to be set on-the-spot, and even allows the process to be fully automated.

A method of calibrating a plurality of chamber pressure sensors is provided. In a method of calibrating a plurality of chamber pressure sensors of a substrate processing system, the substrate processing system is provided with a plurality of chambers and a plurality of chamber pressure sensors arranged to measure pressures in the plurality of chambers, respectively. The plurality of chamber pressure sensors are calibrated by comparing, for all of the chamber pressure sensors, a measured value of a rate of change of pressure of a chamber generated by flowing a gas at a predetermined flow rate to the chamber, measured by the chamber pressure sensor, with a calculated value of the rate of change of pressure of the chamber calculated by treating the gas at the flow rate as an ideal gas. In calculating the rate of change of pressure of the chamber, a volume of a plurality of gas flow paths of the substrate processing system is used in the calculation, and the volume of the gas flow path is calculated in advance by using a pressure measurement value of the gas flow path and treating the gas as an ideal gas.