Abstract:
An electro-mechanical miniaturized device 1 for pressure measurements is described, the device comprising at least one first electro-mechanical miniaturized pressure sensor member 11, configured to detect a respective first pressure value P 1 and to generate a first electrical signal S 1 representative of the first pressure value P 1 , and further comprising at least one second electro-mechanical miniaturized pressure sensor member 12, configured to detect a respective second pressure value P 2 and to generate a second electrical signal S 2 representative of said second pressure value P 2 . The second sensor member 12 is arranged within a casing 13 suitable to seal it. The device 1 further comprises electronic processing means 10, operatively connected to the first 11 and the second 12 sensor members, and configured to determine a measured pressure value P based on said first S 1 and second S 2 electrical signals; and finally comprises interface means 15, operatively connected to the electronic processing means 10 and configured to provide in output said measured pressure value P. The first 11 and second 12 sensor members, the electronic processing means 10 and the interface means 15 are comprised in a single integrated device.
Abstract:
A pressure measurement assembly (20) is provided. The assembly includes a pressure sensor mount (40) having an aperture (36) therethrough. A pressure sensor (52) passes through and is mounted to the aperture (36). The pressure sensor (52) has an electrical characteristic that varies with applied pressure. An isolator plug (50) is configured to be exposed to a process fluid. The isolator plug has an isolation diaphragm (64) disposed to contact the process fluid. A passageway (66) is fluidically coupled to the isolation diaphragm (64) to convey process fluid pressure from the isolation diaphragm (64) to the pressure sensor (52) through an incompressible fluid. The pressure sensor mount (40) is coupled to the isolator plug (50) and has a non-circular shape when viewed along an axis of the aperture.
Abstract:
Eine Differenzdruckmessanordnung umfasst einen Differenzdruckmesswandler (10) zum Erfassen der Differenz zwischen einem ersten Mediendruck und einem zweiten Mediendruck und zum Bereitstellen eines Differenzdruckmesssignals welches von Differenz zwischen einem ersten Mediendruck und einem zweiten Mediendruck abhängt; eine erste Wirkdruckleitung (25), welche an einen ersten Druckeingang (12) des Differenzdruckmesswandlers (10) angeschlossen ist, um den Differenzdruckmesswandler mit dem ersten Mediendruck zu beaufschlagen; eine zweite Wirkdruckleitung (26), welche an einen zweiten Druckeingang (13) des Differenzdruckmesswandlers (10) angeschlossen ist um den Differenzdruckmesswandler mit dem zweiten Mediendruck zu beaufschlagen; mindestens einen Temperatursensor (30) zum Ausgeben eines Temperatursignals welches mit einer Temperatur der Wirkdruckleitungen korreliert (25 26); und eine Verarbeitungseinheit (14) zum Verarbeiten des Differenzdruckmesssignals und des Temperatursignals; wobei die Verarbeitungseinheit dazu eingerichtet ist, anhand des Differenzdruckmesssignals und des Temperatursignals eine signifikante Korrelation zwischen einer Veränderung des Temperatursignals und dem Differenzdrucksignal festzustellen, und die Feststellung einer signifikanten Korrelation als Hinweis auf eine verstopfte Wirkdruckleitung zu werten.
Abstract:
A pressure sensor is provided. The pressure sensor has a differential pressure sensor adapted to measure differential pressure between two differential pressure sensor inputs in a first differential pressure range. The pressure sensor further has a first absolute pressure sensor and a second absolute pressure sensor adapted to measure an absolute pressure in an absolute pressure range. The pressured sensor is further provided with a measuring unit configured to determine a differential pressure in a second differential pressure range on the basis of absolute pressure measurements taken by the first and second absolute pressure sensors.
Abstract:
Pressure measurement system (e.g., for an extracorporeal treatment system), method and pressure pod apparatus including a position sensor for use in repositioning a diaphragm that separates a liquid side cavity from a transducer side cavity (e.g., operatively connected to a pressure transducer); the liquid side cavity being in fluid communication with an inlet and an outlet.
Abstract:
An online method for reconfiguring pressure and position sensors in a hydraulic system is disclosed. In one step, a sensor drift condition, a recalibration request, or an unisolated fault condition is detected. In another step, a system pressure sensor or another sensor, such as a load-sense pressure sensor, is verified as a trusted master reference sensor. Another step includes measuring and recording a first pressure reading at the master reference sensor and first voltage readings associated with first, second, third, and fourth pressure slave sensors at a first pump pressure set point. Another step includes, repeating the previous step at a second pump pressure set point. A new gain and offset for each of the first, second, third, and fourth pressure sensors can be calculated based on a comparison of the recoded first and second pressure readings and the recorded first and second voltage readings.
Abstract:
Die Erfindung bezieht sich auf eine Vorrichtung und ein Verfahren zum Befüllen von Druckmittlern, wobei die Vorrichtung zum Befüllen des Druckmittlers zumindest folgendes umfasst: - einen Gegenkörper auf den der Druckmittler zur Befüllung aufgebracht wird; - eine Anschlagsfläche, die beim Aufbringen des Druckmittlers auf den Gegenkörper zur Trennmembran hin gerichtet ist und die von dem Gegenkörper gehalten wird, wobei beim Anliegen der Trennmembran an der Anschlagsfläche der hydraulische Kammerverbund mit dem vorgegebenen Befüllvolumen befüllbar ist; - ein Dichtelement, das den Bereich zwischen der Anschlagsfläche und der Trennmembran des auf den Gegenkörper aufgebrachten Druckmittlers abdichtet, sowie - einen Evakuierungspfad der den Bereich zwischen der Anschlagsfläche und der Trennmembran des auf den Gegenkörper aufgebrachten Druckmittlers zum verbesserten Anliegen der Trennmembran an der Anschlagsfläche evakuierbar macht.
Abstract:
The invention relates to a method for carrying out a calibration test on a pressure sensor comprising the steps: - fluidly connecting the pressure sensor to a first fluid storage vessel; - fluidly connecting the pressure sensor to a second fluid storage vessel; - providing an initial fluid pressure p 0 at the pressure sensor, the first fluid storage vessel and the second fluid storage vessel; - carrying out a pressure measurement of the initial fluid pressure p 0 at a time t 0 by means of the pressure sensor; - fluidly disconnecting the second fluid storage vessel from the pressure sensor and the first fluid storage vessel; providing a first fluid pressure pi at the second fluid storage vessel; - carrying out a pressure measurement of the first fluid pressure p 1 at a time t 1 by means of the pressure sensor; fluidly connecting the second fluid storage vessel with the pressure sensor and the first fluid storage vessel, so that a second fluid pressure p 2 is provided at the pressure sensor, wherein the second fluid pressure is between the initial fluid pressure p 0 and the first fluid pressure p 1 ; carrying out a pressure measurement of the second fluid pressure p 2 at a time t 2 by means of the pressure sensor and a corresponding test device and a computer program product.
Abstract:
Methods and systems are taught for testing microphone packages - including measuring non- acoustic noise for the package. A package positioner holds a microphone package such that an acoustic input port of the microphone package is aligned with a plug. An actuator moves the plug relative to the microphone package between a first position - where the plug does not obstruct the acoustic input port of the microphone package - and a second position - where the plug obstructs the acoustic input port and restricts acoustic pressures from entering the microphone package through the acoustic input port. A controller monitors an output of the microphone package and identifies the output as indicative of isolated non-acoustic noise when the plug is in the second position.