A high-pressure compressor having a hydraulic system and a gas chamber, where the hydraulic system includes a reservoir, connected to a hydraulic fluid chamber by a hydraulic flow path and a pump assembly positioned in the hydraulic flow path, and the compressor furthermore includes a control element controlling the flow of hydraulic fluid in the hydraulic flow path and thereby the pressure in the hydraulic fluid chamber, where the control element and the pump assembly is configured for controlling the pressure of hydraulic fluid in the hydraulic fluid chamber when the compressor is not in operation.

According to an example aspect of the present invention, there is provided a sensor comprising at least one strut configured to be coupled to a surface of an object at a first end of the strut, a structure connected to a second end of the at least one strut, wherein the structure is V-shaped, U-shaped, curved or arched and configured to be coupled to the surface at both ends, a plurality of cavities positioned along the structure on both sides of the at least one strut, and a plurality of fibre-optic pressure transducers, wherein a single fibre-optic pressure transducer is arranged within each of the cavities, and wherein the sensor is configured such that at least some of the fibre-optic pressure transducers are arranged at different distances from the surface of the object.

The present invention relates to microfluidic or millifluidic chips (1) comprising at least one pressure sensing unit (4) able to measure a fluid flow pressure. The present invention also relates to a method for a direct and contact-free measuring of a local pressure of a fluid circulating in a microfluidic circuit, using a microfluidic or millifluidic chips (1) according to the invention.

A pressure sensor, a manufacturing method thereof, a pressure sensing method and a display device are provided. The pressure sensor includes a first electrode, at least two supports on a first surface of the first electrode, an elastic composite electrode on a side of the supports facing away from the first electrode. Two adjacent supports of the supports, the elastic composite electrode and the first electrode define a compressible space, and the at least two supports are formed of an insulating material. The pressure sensor further comprises a second electrode on a side of the elastic composite electrode facing away from the first electrode and an organic light emitting layer between the first electrode and the second electrode, the organic light emitting layer being in contact with one of the first electrode and the second electrode. The pressure sensor has advantages of low power consumption, fast response and high sensitivity.

A pressure sensor, a manufacturing method thereof, a pressure sensing method and a display device are provided. The pressure sensor includes a first electrode, at least two supports on a first surface of the first electrode, an elastic composite electrode on a side of the supports facing away from the first electrode. Two adjacent supports of the supports, the elastic composite electrode and the first electrode define a compressible space, and the at least two supports are formed of an insulating material. The pressure sensor further comprises a second electrode on a side of the elastic composite electrode facing away from the first electrode and an organic light emitting layer between the first electrode and the second electrode, the organic light emitting layer being in contact with one of the first electrode and the second electrode. The pressure sensor has advantages of low power consumption, fast response and high sensitivity.

A method for measuring and computing unsteady loads using unsteady pressure-sensitive paint (uPSP) data includes performing an in-situ calibration using an average of pixels of a portion of an image captured of a surface painted with pressure-sensitive paint. The method also includes dividing an average static pressure by an intensity for each region of interest (ROI) in terms of time to produce a ratioed intensity measuring an intensity fluctuation. The method further includes producing a pressure-time history from the in-situ calibration and the measured intensity fluctuation. The method also includes calculating a fluctuating force by multiplying the produced pressure-time history by an area of pixels in each ROI, and converting a time signal to a frequency, and producing a power spectral density (PSD) to compare frequency content to determine an amount of energy at a certain frequency band.

A method for measuring and computing unsteady loads using unsteady pressure-sensitive paint (uPSP) data includes performing an in-situ calibration using an average of pixels of a portion of an image captured of a surface painted with pressure-sensitive paint. The method also includes dividing an average static pressure by an intensity for each region of interest (ROI) in terms of time to produce a ratioed intensity measuring an intensity fluctuation. The method further includes producing a pressure-time history from the in-situ calibration and the measured intensity fluctuation. The method also includes calculating a fluctuating force by multiplying the produced pressure-time history by an area of pixels in each ROI, and converting a time signal to a frequency, and producing a power spectral density (PSD) to compare frequency content to determine an amount of energy at a certain frequency band.

The present example embodiment relates generally to creating a specific nanostructure on a substrate to improve the angle independence of a surface plasmon resonance mode. It may comprise a metamaterial structure comprising nanostructures located in a pattern on or within a substrate. The nanostructures may be paraboloid shaped and periodic.

The present example embodiment relates generally to creating a specific nanostructure on a substrate to improve the angle independence of a surface plasmon resonance mode. It may comprise a metamaterial structure comprising nanostructures located in a pattern on or within a substrate. The nanostructures may be paraboloid shaped and periodic.

An optical sensing system comprising an optical fiber, a light source, a first interrogator and a second interrogator. The optical fiber includes one or more optical sensors. The light source is placed at a first end of the optical fiber and is configured to direct light towards the one or more optical sensors. The first interrogator is placed at the first end of the optical fiber. The second interrogator placed at a second, opposite end of the optical fiber. The first interrogator is configured to receive reflected light from the one or more optical sensors, and the second interrogator is configured to receive transmitted light from the one or more optical sensors.