150results about "Fluid pressure measurement by mechanical elements" patented technology

In order to mechanically monitor a gas density of a greenhouse gas in a more climate-friendly and cost-effective manner, the invention provides a density monitoring method for monitoring the gas density of a noxious gas (10), comprising: a) providing a closed reference volume (26) with a partition wall (28) movably disposed between the reference volume (26) and the noxious gas (10) to be monitored, b) providing a reference gas (56) which has a lower global warming potential relative to the noxious gas (10) by at least a factor of two in the reference volume (26) at a reference gas pressure which is higher than the filling pressure of the noxious gas (10), c) compensating, by means of a spring device (32), for a force acting on the separation wall (28) due to the increased reference gas pressure in the reference volume (26), and d) detecting a deflection of the partition wall (28) for monitoring the gas density. A gas density monitor (14), its use in such a method and an electrical system provided therewith are also proposed.

The invention discloses a pressure detection module and a pressure sensor. The pressure detection module comprises a pressure joint used for being connected to a detected pipeline and provided with a fluid passage used for being in fluid communication with the detected pipeline; the force sensitive component is connected to one end of the pressure joint and is in fluid communication with the pressure joint; the strain gauge is attached to the surface of the force sensitive part and is used for detecting the strain of the force sensitive part; the electric connector comprises a seat body and a contact pin which passes through and is fixed on the seat body; the electric connection plate is used for electrically connecting the contact pin to the strain gauge; and the end cap comprises a peripheral wall, an end wall and an opening opposite to the end wall. The force sensitive part and the electric connecting plate are accommodated in the inner cavity of the end cap, and one end of the pressure joint is welded to the opening end of the end cap so as to seal the opening of the end cap; an insertion hole is formed in the end wall of the end cap, and the seat body is inserted into the insertion hole and welded to the end wall so as to seal the insertion hole of the end cap. The sealing structure is simple, high in sealing reliability and low in cost.

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 utility model discloses a multi-drive pressure monitoring module which comprises a main valve body, and a main flow channel extending in the length direction of the main valve body is arranged in the main valve body; the charging connector is arranged at the side part of the main valve body and is communicated with the main flow channel; the branch valve bodies are sequentially arranged in the arrangement direction of the main flow channel and connected with the side portion of the main valve body. The pressure release valve is connected with the branch valve body and is communicated with the main flow channel; the number of the connecting valves is two, the connecting valves are connected with the corresponding branch valve bodies respectively, and the connecting valves communicate with the main flow channel. An external air source can be connected into the monitoring module through the charging connector, multiple sets of charged equipment can be operated at the same time, it is guaranteed that the pressure of each path is balanced, sealing accessories in the pressure release valve are not prone to being damaged, the stable sealing effect is achieved, and meanwhile durability is achieved.

Additional unit for a dispensing device (2) with at least one fluid path (40) between a fluid reservoir (20) and an outlet nozzle (42), which is fluidically and / or mechanically coupled or can be coupled to the fluid path (40), and which performs an additional function during the operation of the dispensing device (2).

To provide an atmospheric pressure sensor for measuring an atmospheric pressure from a physical quantity different from an elastic displacement.SOLUTION: An atmospheric pressure sensor 100 includes a squeeze film damping structure 8 and a computing unit. The squeeze film damping structure 8 includes a first object 4 and a second object 10 capable of moving relatively to the first object 4. A squeeze film damping phenomenon is generated between the first object 4 and the second object 10. The computing unit calculates an ambient pressure of the squeeze film damping structure 8 from a thermal noise generated in the second object 10.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.

The pressure gauge plunger for 3D printing platforms is applicable in various 3D printing fields (bioprinting of tissues; and the food, pharmaceutical, and ceramic industries). Its usefulness is rooted in its ability to continuously control the pressure applied during the entire printing process, thanks to the plunger mechanism. It thereby allows improved quality and detection of errors in situ, allowing corrective actions to be applied during the process. The pressure value that the printing platform component exercises on the plunger (and, thus, on the mass to be extruded) is obtained through use of a stress gauge, This continuous control allows profiling of the printed semi-solid mass, permitting the most appropriate printing parameters to be set in situ, further allowing the process to become completely automated.

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.

A pressure sensor (1) has a housing (20), a plunger unit (11) and a measuring element (12); the housing has a housing interior (20.3) in which the plunger unit and the measuring element are arranged; the plunger unit has a distal plunger end (11.1) and a proximal plunger end (11.2), the distal plunger end being arranged farther from the measuring element along a longitudinal axis (A) of the pressure sensor than the proximal plunger end, and the distal plunger end projecting from the housing, and the proximal plunger end is in operative connection with the measuring element and transfers the pressure (P) of a medium (M) present outside the housing to the measuring element; the pressure sensor has a sleeve (30) which is fastened to the housing; the sleeve and the distal plunger end are spaced apart from each other by a gap (30.4); the pressure sensor has at least one sealing element (40) which presses the sealing gap by means of the seal to prevent the medium from going into the housing interior.

The present invention provides a pressure sensor which is small and has high reliability while ensuring insulation. The pressure sensor (1) comprises: a sensor body (2); a pressure sensor element (21) provided on one side of the sensor body (2); a through hole (24) formed from one side of the sensor body (2) to the other side, through which a wire (3) connected to the pressure sensor element (21) for supplying electricity passes; and an insulating layer (24a) formed on the inner wall of the through hole (24). In the through hole (24), a conductor core wire portion (32) from which the insulation coating of the wire (3) has been removed passes.

The invention discloses a system for remotely measuring a change of a physical quantity which comprises an analogue measuring device and a digital distance reading device, characterised in that it comprises an analogue measuring device requiring no power supply, which has a housing in which there is an opening for a light beam, a mirror onto which the light beam falls, which mirror is connected to a material sensitive to the physical quantity being measured, a light focusing element and a coloured reflective standard, whereby the analogue measuring device uses a change of a physical quantity in the material sensitive to the measured quantity to change the angle of position of the mirror, which reflects the light beam from the light focusing element and directs it to the colour reflective standard, mechanically converting the measurement result into a specific colour from the standard, which then reflects the beam of a specific colour outside the housing, allowing the colour to be read, and a digital device reading the colour from a distance and assigning a specific change of a physical quantity value to this specific colour.

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

A pressure sensor including a crystal housing, a transducer crystal disposed in the housing in vacuum conditions, a driver in contact with the crystal transducer, and a deflectable member in contact with the driver on one surface and exposed to ambient pressure on the opposite surface thereof. A borehole system including a borehole in a subsurface formation, a string in the borehole, and a sensor connected to the string.

To enhance measurement accuracy by providing a pulse pressure measuring device that determines a blood vessel route.SOLUTION: A pulse pressure measuring device 1 includes a plurality of pressing members 11, 12, 13, and 14, a plurality of pressure sensors, and a processing unit 100. The pressing members are used for pressing measurement object parts, each of the pressing members having position coordinates Pi(i=1,2,3...). The pressure sensors are arranged so as to measure the pressure on the pressing members respectively, and generate pressure measurement values Ii(i=1,2,3...) at the position coordinates Pi(i=1,2,3...) respectively. The processing unit determines a blood vessel route using the position coordinates Pi(i=1,2,3...) and the pressure measurement values Ii(i=1,2,3...).SELECTED DRAWING: Figure 1A

A pressure gauge includes a housing, a helical tube, and a compensation member. The housing has an inlet. The helical tube is arranged within the housing and has a closed end and an open end, the open end of the helical tube in fluid communication with the inlet. The compensation member is arranged between the between the open end and the closed end of the helical tube, the compensation member fixed to the helical tube. The compensation member and the helical tube are formed from materials having different coefficients of thermal expansion to limit movement of the closed end of the helical tube due to temperature change of a compressed fluid in fluid communication with the helical tube. Pressure vessel assemblies and methods of displaying pressure in pressure vessels are also described.

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.