49results 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.

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.

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.

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.

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 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.

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 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.

The present invention relates to a method of manufacturing a medical device. The medical device includes a case obtained by mating a first case portion and a second case portion to each other, the case having a housing space inside; an elastic membrane as an elastic member attached to the case and with which a first housing space covered by the first case portion and a second housing space covered by the second case portion are separated from each other; fixing parts provided at respective peripheries of the first case portion and the second case portion and at which the first case portion and the second case portion that are mated to each other are fixed to each other; holding surfaces provided at the respective peripheries of the first case portion and the second case portion and between which a peripheral edge of the elastic membrane is held; and a sealing part provided at the periphery of the first case portion or the second case portion on an inner side with respect to the fixing parts and that seals an entirety of the peripheral edge of the elastic membrane held between the holding surfaces. When fixing at the fixing parts and sealing by the sealing part are performed to assemble the first case portion and the second case portion together, an air gap produced between the sealing part and the fixing parts is depressurized or heated.

A testing device for testing a drive train or components within a marine propulsion system is provided and includes a first disk with a plurality of first disk depressions that faces a second disk with a plurality of second disk depressions. The first disk and the second disk are secured relative to each other so that they define a space, and a seal at outer edges of the disks is in fluid communication with the space. One of the first disk and the second disk is secured to a driven shaft. Upon rotation of the driven shaft, a load is produced due to shearing of fluid between the disks, yet no thrust is produced.

A test device for testing vacuum suction cups of a machine gripper is described, comprising a first carrier on which the vacuum suction cups to be tested can be arranged, and a second carrier with at least one vacuum generator and a pressure sensor pneumatically connected to it, wherein at least one of the two carriers is movable relative to the other of the two carriers by means of a drive, such that the first carrier and the second carrier can be positioned relative to each other in such a way that at least one of the vacuum suction cups comes into a sealing contact position with the at least one vacuum generator, wherein the at least one pressure sensor is connected to an evaluation unit via a signal conductor, which is configured to determine the functionality of the at least one tested vacuum suction cup.

The present application relates to the technical field of atmospheric measurement, and discloses an atmospheric measurement device, which comprises a shell and a plurality of modular resonant cylinder pressure sensors arranged in the shell, each of the modular resonant cylinder pressure sensors comprises a resonant cylinder, an integrated rigid-flexible circuit board, a preprocessing calculation module and an air nozzle, the integrated rigid-flexible circuit board is movably wound outside the resonant cylinder and connected with the resonant cylinder, the preprocessing calculation module is connected with the integrated rigid-flexible circuit board, one end of the air nozzle is connected with the resonant cylinder, and the other end is connected with a pipeline to be measured, part of the plurality of modular resonant cylinder pressure sensors is connected to form a first sensor array through connecting pieces, and the other part is connected to form a second sensor array through connecting pieces, the first sensor array is connected with the shell through a lateral adapter block and an adapter support, the second sensor array is connected with the shell through the lateral adapter block and the adapter support, and the shell has a closed and coherent irregular curved surface structure.

The application discloses a resonant gas sensing detection method based on thermal excitation, which comprises the following steps: using thermal vibration excited by environmental white noise to excite a nano thin film gas sensor; measuring the vibration signal of the nano thin film gas sensor to obtain the vibration information of the nano thin film, and then using a piezoelectric sheet single-frequency excitation to excite the nano thin film gas sensor to obtain the first-order natural frequency of the nano thin film; using the thermal vibration method to excite the nano thin film gas sensor; measuring the first-order natural frequency of the nano thin film under different gas pressures, and inversely calculating the current gas pressure according to the offset of the first-order natural frequency of the nano thin film to realize gas pressure sensing. The application realizes gas pressure sensing by optimizing the excitation mode, using the thermal vibration of the nano thin film gas sensor excited by environmental white noise, measuring the offset of the first-order natural frequency of the nano thin film gas sensor under different gas pressures, and inversely calculating the gas pressure.

A sensor is provided for measuring a flow of a fluid in a physiological environment, such as within a vessel of a human or animal subject. The sensor comprises an interrogation light guide extending from a proximal end to a distal end of the sensor. The interrogation light guide is configured to transmit interrogation light to, and receive reflected interrogation light from, the distal end of the sensor. The sensor further comprises an excitation light guide configured to transmit excitation light to the distal end of the sensor. The excitation light is provided for heating the fluid (directly or indirectly). The sensor further comprises a sensing element located at the distal end of the sensor. The sensing element comprises at least two etalons for reflecting interrogation light back along the interrogation light guide towards the proximal end of the sensor. Each etalon has a respective optical path length and further has at least one reflective surface external to the interrogation light guide. The sensing element is configured to be in thermal contact with the fluid such that the optical path length of at least one etalon is dependent on a temperature of the fluid. The reflected interrogation light forms an interferogram which is dependent on the optical path lengths of the respective etalons.

Provided is a gas water heater. The gas water heater includes a pre-mixer, a combustor having a combustion chamber in communication with a premixing chamber, a condensate water assembly configured to receive and discharge condensate water, and an apparatus for controlling the gas water heater. The pre-mixer includes a premixing chamber and an air intake fan that is configured to supply air to the combustion chamber. The air intake fan is disposed in the premixing chamber. The method includes: acquiring an intake air pressure threshold; acquiring an air intake pressure value of the air intake fan; and controlling, in response to determining based on the air intake pressure value and the intake air pressure threshold that a water seal of the condensate water assembly is at risk of being blown away, the gas water heater to stop operation.

This technology relates to a system and method of delaying CaCO3 scale formation in an oil production well using a phosphonate scale inhibitor and a chelating agent. The addition of a small concentration (less than 5 ppm) of a chelating agent to the phosphonate scale inhibitor delays the scale induction time and scaling time of CaCO3 scale.

The invention relates to a high-precision resonance ball type pressure and temperature integrated sensor, which is characterized in that a resonance ball and a resonance ball fixed support structure are integrally processed, the outer wall of the resonance ball is provided with a resonance ball surface electrode, and the inner wall of a spherical groove on a back cavity structure is provided with a back cavity structure surface electrode; the resonance ball clamped structure and the back cavity structure realize vacuum sealing through a bonding layer, an absolute pressure measurement vacuum cavity is formed between the resonance ball and the spherical groove after sealing, and surface electrodes of the resonance ball are in one-to-one correspondence with surface electrodes of the back cavity structure; a temperature measuring element is arranged on the outer wall of the resonance ball and used for sensing the temperature of the resonance ball in situ, and in-situ temperature error compensation of pressure measurement is achieved. According to the invention, real-time synchronous measurement of pressure and temperature is realized, and in-situ temperature compensation of pressure measurement is also realized, so that the measurement precision, long-term stability and temperature following performance of the pressure sensor are improved.

A system is provided for assessing the quality of a fluid process performed on a fluid, the fluid process including one of fluid suction and fluid dispensing. The system includes: a pump; a probe; a connector, where the pump and the probe are attached to the connector, and a fluid path is at least partially formed by the connector between the pump and the probe; a pressure sensor in fluid communication with the fluid path and configured to sense a pressure of the pump during the fluid process, where the pressure measurement data includes the pump pressure sensed during the fluid process; a processor; and a memory. The memory includes instructions executed by the processor to cause the processor to receive pressure measurement data during the fluid process and determine a quality of the fluid process using a trained machine learning algorithm.

The utility model discloses a kind of corrosion-resistant pressure transmitter, it relates to pressure transmitter technical field, including shell and detection component, the lower end of the shell is connected with sealing ring, the detection component is set to the inside of shell, and detection component includes lug, piston plate, fluorine rubber ring, ejector rod and pressure sensor, the inside of shell is placed with lug, and the top of lug is connected with piston plate.The corrosion-resistant pressure transmitter is set through the detection component, when installing pressure transmitter on the pipeline to be detected using joint, medium can flow to the inside lower end of shell, titanium alloy material piston plate and fluorine rubber ring are used at this time, pressure sensor and medium are isolated, avoid medium directly corroding pressure sensor, while medium can be forced to pressure sensor by piston plate and ejector rod, and then detect pressure, while piston plate and fluorine rubber ring have stronger corrosion resistance, which is conducive to improving the service life of equipment.