A method for operating a group of pressure sensors is provided. First and second pressure sensors respectively have first and second pressure measurement ranges, and are arranged to measure the pressure in a common measurement volume, and have measurement ranges that overlap in a range. The method comprises: aa) reading out first and second measurement signals respectively from the first and second pressure sensors substantially simultaneously while the pressure in the common measurement volume is in the overlapping range; bb) stipulating the first measurement signal which has been read out as the adjustment point for the second pressure sensor; cc) determining at least one calibration parameter, in particular a gas-dependent calibration parameter, for the second pressure sensor as a function of the first measurement signal, as a function of the adjustment point for the second pressure sensor, as stipulated in bb), and as a function of the second measurement signal.

Instrumentation comb for an aircraft engine including a central tube with a longitudinal axis on which a determined number of orifices spaced apart along this longitudinal axis are drilled and a base forming a proximal end of this tube and intended to be fixed on a crankcase portion of the aircraft engine, each orifice being associated with a sensor for measuring a physical parameter of the aircraft engine and the base integrates a slave processing unit connected to each of the measuring sensors by a communication link able to receive in real time digital measurement data corresponding to the physical parameters measured by the measuring sensors and intended to be communicated to a master processing unit by a single communication link.

A gas safety device includes flow path, shutoff valve that shuts off flow path, flow rate measurement unit that measures a flow rate of gas, gas-side absolute pressure sensor that measures absolute pressure of the gas, atmosphere-side absolute pressure sensor that measures absolute pressure of atmospheric pressure, and pressure value transition detector that detects a transition state of the absolute pressure measured by gas-side absolute pressure sensor. Further provided are sensor drive controller that controls driving of atmosphere-side absolute pressure sensor in accordance with a value of pressure transition in pressure value transition detector, and gas pressure determination unit that calculates gas supply pressure from a difference between pressure values measured when the two sensors are driven. Control circuit is further provided to shut off flow path with shutoff valve when determining anomaly from a flow rate measured by flow rate measurement unit and gas supply pressure calculated by gas pressure determination unit.

A gas safety device includes flow path, shutoff valve that shuts off flow path, flow rate measurement unit that measures a flow rate of gas, gas-side absolute pressure sensor that measures absolute pressure of the gas, atmosphere-side absolute pressure sensor that measures absolute pressure of atmospheric pressure, and pressure value transition detector that detects a transition state of the absolute pressure measured by gas-side absolute pressure sensor. Further provided are sensor drive controller that controls driving of atmosphere-side absolute pressure sensor in accordance with a value of pressure transition in pressure value transition detector, and gas pressure determination unit that calculates gas supply pressure from a difference between pressure values measured when the two sensors are driven. Control circuit is further provided to shut off flow path with shutoff valve when determining anomaly from a flow rate measured by flow rate measurement unit and gas supply pressure calculated by gas pressure determination unit.

A method in gait rehabilitation for detecting a foot being lifted comprises: receiving (102) a plurality of signals from respective pressure sensors (12), mounted beneath a foot of a person, each signal providing a time sequence of values representing asserted pressure; processing the received signals, wherein said processing comprises, for each signal, assigning states to the respective pressure sensor (12) for determining when the foot is being lifted for walking, and wherein said assigning of states comprises: identifying that the sequence of values are maintained above an upper threshold (32) for a duration exceeding a time threshold (36); and upon such identifying assigning a prepared state to the sensor (12); and, when the sensor (12) is in the prepared state, identifying (108) a value below a lower threshold (34) indicating that the foot is potentially lifted; and upon such identifying assigning an unprepared state to the sensor (12); and wherein said processing further comprises, when assigning an unprepared state to a first sensor, determining (110) whether a prepared state is assigned to a second sensor and comparing (112) a priority of the first sensor and the second sensor.

A method in gait rehabilitation for detecting a foot being lifted comprises: receiving (102) a plurality of signals from respective pressure sensors (12), mounted beneath a foot of a person, each signal providing a time sequence of values representing asserted pressure; processing the received signals, wherein said processing comprises, for each signal, assigning states to the respective pressure sensor (12) for determining when the foot is being lifted for walking, and wherein said assigning of states comprises: identifying that the sequence of values are maintained above an upper threshold (32) for a duration exceeding a time threshold (36); and upon such identifying assigning a prepared state to the sensor (12); and, when the sensor (12) is in the prepared state, identifying (108) a value below a lower threshold (34) indicating that the foot is potentially lifted; and upon such identifying assigning an unprepared state to the sensor (12); and wherein said processing further comprises, when assigning an unprepared state to a first sensor, determining (110) whether a prepared state is assigned to a second sensor and comparing (112) a priority of the first sensor and the second sensor.

A pressure sensor (100) includes a pressure measuring device (120) including: a circuit board (121); and a processing unit (122) and a detection unit, both provided on the circuit board (121); the detection unit includes first, second and third MEMS sensing elements (123, 124, 125); the first MEMS sensing element (123) is configured to sense a first pressure (P1) at a first target position; the second MEMS sensing element (124) is configured to sense a second pressure (P2) at a second target position, and the third MEMS sensing element (125) is configured to sense a pressure difference (ΔP) between the first and second target positions; the processing unit (122) is configured to determine whether the three MEMS sensing elements (123, 124, 125) are abnormal based on the first and second pressures and on the pressure difference; if it is determined that at least one of the three MEMS sensing elements is abnormal, the processing unit (122) outputs abnormal diagnostic information; if it is determined that none of the three MEMS sensing elements is abnormal, the processing unit (122) outputs information about the pressure(s) at the first and/or second target position(s) and the pressure difference; thus rationality diagnosis of the pressure signals is achieved, resulting in increased reliability and accuracy in pressure measurement.

Various embodiments are directed to a pressure sensor and method of using the same. A pressure sensor may comprise a substrate having a substrate thickness extending between a first substrate surface and a second substrate surface, wherein the first substrate surface and the second substrate surface define opposing ends of the substrate thickness; a first pressure sensing assembly attached to the first substrate surface and configured to detect a first pressure force associated with a first fluid volume, wherein a portion of the first substrate surface adjacent the first pressure sensing assembly is fluidly isolated from the first volume of fluid; and a second pressure sensing assembly attached to the second substrate surface and configured to detect a second pressure force associated with a second volume of fluid, wherein a portion of the second substrate surface adjacent the second pressure sensing assembly is fluidly isolated from the second fluid volume.

A pressure gauge includes a case with a dial, and a pressure detection unit is located in the case. The chassis plate including a first pivot unit, a second pivot unit, a first Bourdon Tube, a second Bourdon Tube, a first transmission unit, a second transmission unit and an entrance connected thereto. The first Bourdon Tube is connected to the first pivot unit by the first transmission unit, and the second Bourdon Tube is connected to the second pivot unit by the second transmission unit. The entrance communicates with the first and second Bourdon Tubes. The first and second pivot units extend through the dial so as to be connected with a first hand and a second hand respectively. The first and second hands respectively respond different pressure values for more accuracy.

The present invention pertains to a method and experimental apparatus for studying properties of cement slurry to be used in an oil or gas well under varied pressure and temperature conditions. This apparatus can be used to predict the likelihood of gas migration, compressive strength and static gel strength of cement slurry. It comprises a servo motor and coupling magnets to drive a paddle at a very slow speed through the cement in a pressure vessel, a pair of acoustic transducers to generate an acoustic signal and measure the transit time of the acoustic signal after it transits the cement, and a gas injection system to predict the severity of gas migration in cement.