Valtion Teknillinen Tutkimuskeskus

Teknologian Tutkimuskeskus Vtt Oy

Vitalsignum Oy

Nicanti Oy

Teknologian Tutkimuskeskus Vtt

Nicanti S.r.l.

Panu Helistö

Heikki Seppä

Arttu Luukanen

Juha Hassel

Timo Varpula

Andrey Timofeev

Anssi Rautiainen

Hannu Sipola

Leif Grönberg

Heikki SeppÄ

A mobile device for measuring at least one electrical biosignal. The device comprises a first input and a second input, a measuring circuit part for providing an output signal indicating the electrical biosignal to be measured, the measuring circuit part comprising a first input and a second input, and a charging circuit part for charging a rechargeable battery inserted in the device, the charging circuit part comprising a first input and a second input. The first input of the measuring circuit part and the first input of the charging circuit part are connected to the first input of the mobile device and the second input of the measuring circuit part and the second input of the charging circuit part are connected to the second input of the mobile device.

Mobile device for measuring electrical biosignals

A superconducting thermal detector (bolometer) of THz (sub-millimeter) wave radiation based on sensing the change in the amplitude or phase of a resonator circuit, consisting of a capacitor (Csh) and a superconducting temperature dependent inductor where the said inductor is thermally isolated from the heat bath (chip substrate) by micro-suspensions. The bolometer design includes a thin film inductor located on the membrane, a single or/and multi-layered thin film capacitor, and a thin film absorber of incoming radiation. The bolometer design can also include a lithographic antenna with antenna termination and/or a back reflector beneath the membrane for optimal wavelength detection by the resonance circuit. The superconducting thermal detector (bolometer) and arrays of these detectors operate in a temperature range from 1 Kelvin to 10 Kelvin.

Superconducting thermal detector (bolometer) of terahertz (sub-millimeter wave) radiation

A method and device for reading an electronic code. An alternating electrical signal is brought to the code being measured with the aid of electrodes, and the current or voltage travelling through the electrodes is measured. The real and the imaginary components of the current or correspondingly the voltage are defined. The electrodes, being on an essentially lossless surface, an angle correction is made to the real and imaginary components of the current or the voltage in such a way that substantial changes in the current take place only in the imaginary component of the current or voltage.

Method and device for identifying an electronic code

The invention relates to a bolometer element, a bolometer cell, a bolometer camera, and a method for reading a bolometer cell. The bolometer cell comprises several bolometer elements. Each bolometer element comprises a first bolometer having a first heating resistance for sensing radiation power acting on the element, and a second bolometer having a second heating resistance, and in each bolometer element the first and second bolometers are electrically connected to each other in such a way that the heating resistance () of the first bolometer can be biased with the aid of a voltage through the heating resistance of the second bolometer in order to amplify the radiation power detected with the aid of the connection. With the aid of the invention, it is possible to implement an extremely sensitive bolometer camera.

Bolometer element, bolometer cell, bolometer camera and method

The invention relates to a circuit for transition-edge bolometers, which comprises a resistor element () arranged to operate in the transition-edge zone, and an amplifier () connected to the resistor element (). According to the invention, in connection with the amplifier () means are arranged for implementing positive () and negative () feedbacks in the resistance measurement.

Coupling and method for a transition-edge bolometer

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Espoo, Finland

Panu Helistö