Nokia Technologies Oy

Sandvik Mining and Construction Oy

Magnasense Technologies Oy

Magnasense Oy

Jukka Lekkala

Jarkko Makiranta

Kari Kirjavainen

Seppo Uosukainen

Markku Keskiniva

Akos Vetek

Vesa Uitto

Vesa Välimäki

Antti Vehkaoja

Jarkko Mäkiranta

Veikko Surakka

Jarmo Verho

Hannu Nykanen

Oleg Spakov

Ville Rantanen

Heimo Ihalainen

Toni Vanhala

Hannu Nykänen

In accordance with an example embodiment, there is an apparatus that has a headset, a contactless proximity sensor arranged to be supported by the headset in the proximity of a face of a user, and a sensor circuitry configured to cause output of a signal indicative of temporal variations in the distance between the contactless proximity sensor and the face of the user.

Method and apparatus for detecting facial changes

The invention concerns a device for the qualitative or quantitative measurement of a magnetically labelled analyte. The device includes a coil arrangement for measuring the analyte from a sample absorbed in a test base. The coil arrangement includes at least one measuring coil and a reference coil arranged in connection with it. From the signal of the coil arrangement a change in inductance correlating to the content of the magnetically labelled analyte is arranged to be detected. The change in inductance is arranged to be detected from a change (&#x394;A, &#x394;&#x3c6;) in amplitude and/or phase appearing in the output signal of the coil arrangement, which is arranged to be measured at the frequency of the input signal. In addition, the invention also relates to a corresponding method.

Device for measuring magnetic particles and corresponding method

The invention relates to a method of measuring a stress wave and to a measuring device and a rock breaking device. A percussion device () gives impact pulses to a waveguide (), where a compression stress wave and a reflected tensile stress wave are generated, which propagate in the waveguide. The compression stress wave causes an extension in the waveguide and the tensile stress wave a thinning, in which case properties of the waveguide may be determined by measuring geometric changes in the cross section of the waveguide. The measurement data are utilized in controlling the rock breaking device.

Measuring device, rock breaking device and method of measuring stress wave

The invention relates to a method and an equipment for attenuating sound in a duct. Sound propagating in a duct is detected by means of a detector () and attenuated by using two successive monopole elements () in such a way that both elements function as a dipole approximation and the elements are also used to approximatively produce the monopole radiation needed. A dipole control signal is fed to both elements () at a phase shift which is 180&#xb0; between the two elements. In addition, a monopole control signal is fed to the same elements (), only this time cophasally. Total volume velocities produced by the two elements () are combinations of the portions obtained from the monopole and dipole sources.

Method and equipment for attenuating sound in a duct

The invention relates to a sensor for measuring acceleration and sound pressure, the sensor comprising a first pressure sensitive film (,) for measuring pressure (P) and second pressure sensitive film (,) having a mass (,) disposed thereon for measuring acceleration (A). The films are arranged concentrically in the same plane, so that pressure and acceleration are measured at the same point, thereby avoiding a phase difference between the two measurements.

Sensor for measuring acceleration and sound pressure

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Tampere, Finland

Jukka Lekkala