12results about "Fluid pressure measurement by mechanical elements" patented technology

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.

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.

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 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 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.

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.

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.

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.

Visual indicator (10) of depression in a pneumatic circuit (3), comprising: a hollow body (11) having a base (12) and a top (13) which are connected by at least one side wall (14) provided with at least one window (15) in the vicinity of the top (13); a connection element (16) to the pneumatic circuit (3) which is integral with the base (12) of the body (11) and which opens into the body (11) by a conduit (18) provided in the base (12) of the body (11); a bellows (19) which has a first open end (19.1) fixed to the base (12) opposite the conduit (18) and a second closed end (19.2) and which is deformable between an extended state in which the second end (19.2) extends in the vicinity of the top (13) opposite the window (15) and a retracted state in which the second end (19.2) extends between the base (12) and the window (15); and a magnetic attraction device (23) comprising a first element (23.1) attached to a front wall of the second end (19.2) of the bellows (19) and a second element (23.2) attached to the apex (13) to exert on the first element (23.1) a predetermined restraining force when the bellows (19) is in its deployed state. FIGURE IN ABRIDGED DIAGRAM: Fig. 1.

The utility model discloses a pressure detection device for a mine filling pipeline. The pressure detection device comprises a filling three-way pipe, a vibrating wire type soil pressure gauge, a filling blind plate, an outer clamp and a telemetering cable, the top end of the filling three-way pipe is a pressure meter mounting port; a vibrating wire type soil pressure gauge is installed in the pressure gauge installation opening, a filling blind plate is welded above the vibrating wire type soil pressure gauge, the filling blind plate and the filling three-way pipe are fixedly installed through an outer clamp, and a telemetering cable of the vibrating wire type soil pressure gauge is connected with a computer detector to display the pressure value. The device is simple in structure and accurate in pressure detection; the problem that the pressure detection difficulty of the filling pipeline is large is effectively solved, use and maintenance are convenient, and real-time pressure detection in the filling pipeline is guaranteed.

A pressure-measuring device according to the invention has a hydrophobic membrane, which is air permeable in the dry state and air impermeable in a moistened state, and a pressure sensor, which is in mechanical contact with the hydrophobic membrane and which is designed to follow a movement of the membrane. During the filling of a line system, air is separated via the hydrophobic membrane and, in the air-impermeable state, the pressure in the line system is measured by means of the moistened hydrophobic membrane.