Teknologian Tutkimuskeskus Vtt Oy

Orion Diagnostica Oy

Valtion Teknillinen Tutkimuskeskus

Teuvo Sillanpää

Panu Koppinen

Markku Antero Ylilammi

Juhani Luotola

Heikki Seppä

Kai-Erik Elers

Cyril Karuthedath

According to an example aspect of the present invention, there is provided an apparatus comprising a microelectromechanical, MEMS, capacitor comprising two plates and a gap between the plates, a gas conveyor configured to cause gas to flow through the gap, and readout circuitry configured to measure a capacitance of the MEMS capacitor.

Particle sensor

An ultrasound sensor apparatus comprises at least one ultrasound transmitter, which outputs ultrasound into fluid, and a frequency controller, which receives information on temperature of the fluid and controls the frequency of the ultrasound output by the at least one ultrasound transmitter as a function of the temperature of the fluid.

Ultrasound sensor apparatus and method of transmitting of ultrasound

According to an example aspect of the present invention, there is provided an apparatus comprising a volume for receiving a gas sample; and an ultrasonic transducer; wherein the ultrasonic transducer is caused to generate a standing wave to the volume, said standing wave comprising at least one particle trapping zone for trapping particles carried by the gas sample, and to release particles trapped to the at least particle trapping zone by decreasing power of the standing wave to at least one lower power level and/or switching off the standing wave.

Trapping and releasing particles carried by gas sample

A capacitive pressure sensor for an internal combustion engine is provided having a housing having a bottom surface, variable capacitor and circuitry. The variable capacitor is formed by a stationary electrode and an elastically bendable electrode. Pressure exerted on the bottom surface acts to bend the elastically bendable electrode. This bending alters the capacitance of the variable capacitor. The circuitry is configured to generate a signal based on the variable capacitance of the variable capacitor. This capacitance is representative of the pressure exerted on the bottom surface.

Capacitive cylinder pressure sensor

The invention relates to a sensor () and a method for measuring pressure, variation in sound pressure, a magnetic field, acceleration, vibration, or the composition of a gas. The sensor () comprises an ultrasound transmitter (), and a cavity () arranged in connection with it. According to the invention, the sensor () comprises a passive sensor element () located at the opposite end of the cavity () to the ultrasound transmitter (), the distance of which from the ultrasound transmitter () is selected in such a way that the resonance condition is met at the ultrasound frequency used, the ultrasound transmitter () comprises a light-construction diaphragm oscillator (), which is thus well connected to the surrounding medium, and the sensor includes means for measuring the interaction between the ultrasound transmitter () and the cavity ().

Device for measuring pressure, variation in acoustic pressure, a magnetic field, acceleration, vibration, or the composition of a gas

Sonication of a medium for example in an immunoassay is provided by applying sound waves from a transducer to a vessel in which the medium is held by a sonotrode coupled between the transducer and the vessel. The sonotrode has a recess in which the vessel is held, the recess being formed by facing surfaces of a plurality of protruding portions of the sonotrode separated by slits and arranged around the recess. The sonotrode is coupled to the vessel by dry contact with the vessel without any coupling layers therebetween. The use of such a sonotrode provides the advantages of allowing effective sonication with relatively low energy loss and with a low temperature elevation.

Sonication of a medium

Sonication of a medium for example in an immunassay is provided by applying sound waves from a transducer to a vessel in which the medium is held by a sonotrode coupled between the transducer and the vessel. The sonotrode has a recess in which the vessel is held, the recess being formed by facing surfaces of a plurality of protruding portions of the sonotrode separated by slits and arranged around the recess. The sonotrode is coupled to the vessel by dry contact with the vessel without any coupling layers therebetween. The use of such a sonotrode provides the advantages of allowing effective sonication with relatively low energy loss and with a low temperature elevation.

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Espoo, Finland

Teuvo Sillanpää