摘要:
The present invention provides a pressure change measuring apparatus and a pressure change measuring method, which are capable of detecting a change in pressure to be measured with respect to a time axis with high accuracy. Specifically, a reference value setting unit (60) included in a pressure change measuring apparatus (1) is configured to generate a reference value signal based on an output signal of a differential pressure measuring cantilever (4) under a predetermined state, and to output the reference value signal. An arithmetic processing unit (30) is configured to calculate the pressure change in pressure to be measured based on the output signal, the reference value signal, a volume of a cavity (10), a flowing quantity of a pressure transmission medium flowing into and out of the cavity (10) for every unit of a predetermined time period, and the like.
摘要:
Flow through pressure sensors for use in fluid chromatography systems include a planar device formed from diffusion bonding of a plurality of metallic sheets and at least one sensing element. The planar device has a top surface, a bottom surface and a flow through channel. A diaphragm formed from a portion of one of the top or bottom surfaces is located adjacent to a sensing region of the flow through channel and is attached to the sensing element. The diaphragm is sized to deflect a distance in response to fluid pressure in the sensing region, which has an internal volume of less than about 25 microliters. The diaphragm and attached sensing element form a pressure sensor that measures strain or deflection of the diaphragm to calculate a pressure within the sensing region.
摘要:
The disclosed pressure transducer assembly comprises a transducer (12) for generating electrical signals in response to differential pressures; a structure (13) for encasing the transducer, the encasing structure including first and second ports (15, 16) for communicating fluids at first and second pressures to the transducer; and a housing (11) for enveloping the casing structure (13) with fluid having a pressure at least approximately equal to the first or second pressure, the encasing structure being removably disposed within the housing.
摘要:
Techniques are described herein that perform pressure sensing using pressure sensor(s) that include deformable pressure vessel(s). A pressure vessel is an object that has a cross section that defines a void. A deformable pressure vessel is a pressure vessel that has at least one curved portion that is configured to structurally deform (e.g., bend, shear, elongate, etc.) based on a pressure difference between a cavity pressure in a cavity in which at least a portion of the pressure vessel is suspended and a vessel pressure in the pressure vessel.
摘要:
Techniques are described herein that perform pressure sensing using pressure sensor(s) that include deformable pressure vessel(s). A pressure vessel is an object that has a cross section that defines a void. A deformable pressure vessel is a pressure vessel that has at least one curved portion that is configured to structurally deform (e.g., bend, shear, elongate, etc.) based on a pressure difference between a cavity pressure in a cavity in which at least a portion of the pressure vessel is suspended and a vessel pressure in the pressure vessel.
摘要:
A pressure indicator consists of an upper cover (1), an intermediate member (2), an elastic pressure-sensing diaphragm (3), a transmission indication rod (4), and a lower cover (5). A check valve (1-2) is disposed in the upper cover (1). An outer wall and the check valve (1-2) jointly constitutes an upper opening (1-1). The upper cover (1) and the intermediate member (2) jointly form an air channel (1-5) through the air. The lower port (2-2) of the intermediate member (2) is bonded to a circumferential flange (3-1) of the elastic pressure-sensing diaphragm (3). A groove (3-6) fitted to a support end (4-1) of the transmission indication rod (4) is disposed in the lower surface (3-3) of the elastic pressure-sensing diaphragm (3). The transmission indication rod (4) consists of the support end (4-1), a connection rod (4-2), an indication end (4-4), and holes (4-3). The connection rod (4-2) and the indication end (4-4) are separately connected to the top part and the bottom part of the support end (4-1). The holes (4-3) are located on two sides of the indication end (4-4).
摘要:
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.
摘要:
The invention relates to a device (1) for measuring a pressure differential between a high-pressure side (10) and a low-pressure side (12), wherein the device (1) has a transmitter (58) that can be moved by means of a biased energy accumulator (60) in at least one direction, the position of said transmitter relative to a stationary part of the device (1) being dependent upon the pressure differential to be measured, and the device (1) furthermore has a sensor (66), with which the position of the transmitter (58) and thereby the pressure differential can be detected, and wherein the energy accumulator (60) sits closely both against the transmitter (58) and against a stationary part of the device (1), thereby sealing the high-pressure side (10) relative to the low-pressure side (12).