摘要:
The flow rate control device 10 includes a control valve 11, a restriction part 12 provided downstream of the control valve 11, an upstream pressure sensor 13 for measuring a pressure P1 between the control valve 11 and the restriction part 12, a differential pressure sensor 20 for measuring a differential pressure ΔP between the upstream and the downstream of the restriction part 12, and an arithmetic control circuit 16 connected to the control valve 11, the upstream pressure sensor 13, and the differential pressure sensor 20.
摘要:
Altitude determining circuitry for use in a User Equipment (UE) of a wireless communication network is provided. The circuitry comprises a receiver to receive at least one pressure parameter representative of a plurality of indoors pressure measurements from a respective plurality of indoors pressure measurement units located inside a building at different altitudes. The altitude determining circuitry also has processing circuitry to receive from a pressure sensor in the User Equipment a local pressure measurement at the UE and the processor determines an indoors altitude of the UE using the at least one pressure parameter and the UE local pressure. An integrated circuit for a Global Navigate Satellite System comprising the altitude determining circuitry and an indoors pressure measurement unit having a sensor for making a pressure measurement and a transmitter for transmitting the pressure measurement to the UE or to a further indoors pressure measurement unit are also provided.
摘要:
A pressure gauge includes: an outer container defining an outer chamber set to a reference pressure (Pr); an inner container disposed in the outer container; and a tube setting the inside of a first inner chamber of the inner container to a measurement pressure (Px). The inner container includes: a cylindrical rigid wall portion; first and second pressure receiving plates that displace due to a differential pressure between the reference pressure and the measurement pressure; a bellows partitioning the inner container into the first inner chamber and a second inner chamber; and a pressure detection element disposed in the second inner chamber and detecting the measurement pressure based on the displacements of the first and the second pressure receiving plates. The outer chamber and the second inner chamber are set to the reference pressure of a high vacuum that is lower than a lower limit of the measurement pressure.
摘要:
A sensor element includes: a supporting body; and a sensor body, the sensor body being planar and being formed of an elastic material, a first surface and a second surface of the sensor body each having an electrically conductive coating. The supporting body and the sensor body are integrally formed.
摘要:
A differential pressure sensor chip (2) includes: first and second pressure introduction holes (21_1 and 21_2); first and second diaphragms (23_1 and 23_2) formed to cover the first and second pressure introduction holes; first and second depressions (24_1 and 24_2) each in a form of a depression respectively provided to face the first and second pressure introduction holes with the first and second diaphragms interposed therebetween; a first communication channel (25) that makes a chamber between the first depression and the first diaphragm and a chamber between the second depression and the second diaphragm communicate to each other; a pressure-transmission-material introduction passage (26) an end of which is an opening and another end of which is joined to the first communication channel; a pressure transmission material (27) that fills the first communication channel, the two chambers, and the pressure-transmission-material introduction passage; and a sealing member (7) formed of a metal formed to seal a depression on a metal layer (9) formed on a surface of the opening of the pressure-transmission-material introduction passage.
摘要:
Provided is a pressure sensor apparatus including a lead frame, a pressure sensing element mounted on the lead frame to measure a relative pressure between a first part and a second part, and a housing including a reference medium inlet hole to apply a pressure of a reference medium to the first part, and including a target medium inlet hole to apply a pressure of a target medium to the second part, wherein the reference medium inlet hole is provided in a first surface of the housing, wherein the target medium inlet hole is provided in a second surface of the housing other than the first surface, and wherein the lead frame includes one or more insertion terminals configured to be inserted into and electrically connected to terminal holes of a wire connector.
摘要:
In one aspect, a pressure sensor for detecting a pressure differential between first and second fluid sources may include sensor body defining a cavity and a seal plate slidably positioned within the cavity. The seal plate may define first and second chambers within the cavity, which may respectively be in fluid communication with the first and second fluid sources. The sensor may also include a sensing element configured to detect a position of the seal plate relative to the sensor body, which may be indicative of the pressure differential between the first and second fluid sources. The sensor may further include a first spring positioned within the first chamber and compressed between a first side of the seal plate and the sensing element. Additionally, the sensor may include a second spring positioned within the second chamber and compressed between a second side of the seal plate and the sensor body.
摘要:
A pressure difference sensor for providing a pressure measurement signal, comprising: a pressure difference measuring cell, which is suppliable with first and second pressures and which outputs the pressure measurement signal; first and second ceramic stiffening elements, each of which is joined with the pressure difference measuring cell and has a duct, via which the first, respectively the second, pressure is suppliable to the pressure difference measuring cell; a platform with first and second pressure input openings, each of which extends from a first surface to a second surface of the platform, wherein the pressure input openings are sealed on the first surface, each with its own isolating diaphragm, and first and second pressures tubes, which are arranged between the stiffening elements and the platform, and wherein each of the first pressure tube and the second pressure tube has at least one bend in a region between the platform and a first, respectively second, connecting area of the corresponding pressure tube.
摘要:
One or more electroactive polymer (EAP) strips are circumferentially or lengthwise embedded or mounted around the fluid passage member. The EAP strips change electrical characteristics (e.g., capacitance, resistance) independent of an applied actuation as they are stretched, so they may be used to measure fluid pressure and/or fluid flow rate.
摘要:
A system to detect a pressure difference between the interior of a cabin of an aircraft and the exterior of the aircraft. The system includes a window arrangement having a first windowpane with a first surface and an opposite second surface and is adapted to be mounted in an aircraft such that the first surface of the first windowpane faces the exterior of the aircraft and is subjected to ambient outside atmospheric pressure and the second surface faces the cabin interior, and a pressure sensor including a first pressure port. The first windowpane includes a first air passage opening extending between the first and second surfaces of the first windowpane, and the pressure sensor is sealingly connected to the first air passage opening such that the first pressure port of the pressure sensor is subjected to pressure acting on the first surface of the first windowpane.