Valtion Teknillinen Tutkimuskeskus

Teknologian Tutkimuskeskus Vtt

Other

Teknologian Tutkimuskeskus Vtt Oy

Nokia Corporation

Upm-kymmene Corporation

Smartrac I.p. B.v.

Murata Electronics Oy

Valmet Automation

Oras Oy

Stresstech Oy

Nokia Technologies Oy

Nokia Siemens Networks Oy

Smartrac Investment B.v.

Intellectual Ventures Holding 9 LLC

Heikki Seppä

Tomi Juha Mattila

Timo Varpula

Mark Allen

Ari Alastalo

Ville Viikari

Kaj Nummila

Panu Helistö

Aarne Oja

Kaarle Jaakkola

Juhani Virtanen

Teuvo Sillanpää

Arttu Luukanen

Kirsi Tappura

Jukka Kyynäräinen

Juha-Matti Saari

Hannu Sipola

Juha Vattulainen

Olli Jaakkola

Anssi Rautiainen

Ville Kaajakari

Tomi Mattila

Arto Sakari Sunila

Janne-Yrjo Antola

Lauri Holappa

Hannu Helle

Jussi Tuppurainen

Miika Huusko

Jerome Lamy

Teuvo SillanpÄÄ

Olavi MERILÄINEN

Kaj Nummiila

The present invention related to a new passive wireless sensor platform which is based on the intermodulation communication principle. The platform may utilize a quartz crystal or other mechanical resonator. Additionally, the platform allows for a narrow bandwidth and/or ID-code of a sensor. Certain embodiments enable high frequencies and large read-out distances. It facilitates a generic sensor element and can thus be used to monitor virtually any quantity. Additionally, it offers a means to realize a wireless passive sensor using MEMS sensor technology.

Intermodulation sensor platform based on mechanical resonator

A power collector structure connected to a base is repetitively deformed or bent. The power collector structure is bar-like, and is connected to the base in an essentially rigid manner. A power collector for converting mechanical energy to electric power is connected to the power collector structure.

Power collector structure and method

Described herein is a passive wireless resonating non-linear sensor that is typically based on a ferroelectric varactor. The sensor replies its data at an intermodulation frequency when a reader device illuminates it at two closely-located frequencies. Furthermore, described herein is a general intermodulation read-out principle for passive wireless sensors. A sensor utilizes a mixing element, such as a varactor and it can be equipped with a capacitive, inductive, or resistive sensor element. When the sensor is illuminated with signals with two frequencies it replies the sensor data at an intermodulation frequency.

Non-linear resonating sensor and a method

This document describes a wireless sensor comprising a MEMS resonator and an antenna directly matched thereto. Also a method of reading the wireless sensor is described. The method comprises illuminating the wireless sensor with electromagnetic energy at a first and second frequencies and receiving an intermodulation signal emitted by the wireless sensor in response to said electromagnetic energy at the first and second frequencies.

Wireless MEMS sensor and method of reading the same

This document describes a method for measuring temperature. In accordance with the invention the temperature is determined from frequency variation of a local oscillator of a RFID tag ().

Method for temperature measurement

A method for determining a value of an environment variable using raw data from an energetically essentially passive remote-access apparatus. A value of a first measurable quantity indicative of the environment variable is obtained from the raw data. The value of the environment variable is determined using calibration data and the value of the first measurable quantity. The accuracy is enhanced by measuring the value of the measurable quantity with a measuring signal of which strength is regulated or by obtaining a value of a second measurable quantity. The second measurable quantity is indicative of the environment variable or measurement conditions of the first measurable quantity. A method for forming calibration data for the measurements. RFID reader devices arranged to carry out the methods and energetically essentially passive remote-access apparatuses for the methods. A database that may be used with the method and a computer product including the database.

Methods for enhancing the accuracy of environment measurements using a remote-access apparatus

This document describes a method and system for object localization. In accordance with the method an object () is illuminated by at least one first type of signal, and response of the signal is detected. In accordance with the invention the object () equipped with a transponder () backscattering the first type of signal, the transponder () is illuminated also by a second type of signal affecting to the backscattering frequency of the transponder (), and the backscattered signal from the transponder () is detected in order to localize the object.

Method and system for object localization

The invention relates to a sintering method for manufacturing structures by sintering. In addition, the invention relates to a sintered product, an electronic module, and new uses. In the method, a particle material containing conductive or semiconductive encapsulated nanoparticles is sintered, in order to increase its electrical conductivity, by applying a voltage over the particle material. In the method, a substrate is typically used, one surface of which is at least partly equipped with a layer containing nanoparticles. The method is based on thermal feedback between the voltage feed and the nanoparticles. The invention permits the manufacture of conductive and semiconductive structures and pieces by sintering at room temperature and at normal pressure.

Method for manufacturing conductors and semiconductors

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

This publication discloses a method and apparatus for functionalizing nanoparticle systems. The method comprises treating a nanoparticle-containing layer so as to produce a pattern of structurally transformed zones, the treatment comprising applying an electric field through the nanoparticle layer. According to the invention an AC-field capacitively coupled to the nanoparticle-containing layer is used as said electric field. The treatment preferably results in at least partly sintered structures, which can be used as conductors, for example. The document discloses several realizations for utilization of the disclosed functionalization in mass-fabrication lines.

Method and apparatus related to nanoparticle systems

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

The present invention relates to a micromechanical sensor for analyzing liquid samples and an array of such sensors. The invention also concerns a method for sensing liquid samples and the use of longitudinal bulk acoustic waves for analyzing liquid phase samples micromechanically. The sensor comprises a body and a planar wave guide portion spaced from the body. At least one electro-mechanical transducer element are used for excitation of longitudinal bulk acoustic waves to the wave guide portion in response to electrical actuation and for converting acoustic waves into electrical signals. The wave guide portion is provided with a sample-receiving zone onto which the sample can be introduced. By means of the invention, the sensitivity of micromechanical liquid sensors can be improved.

Micromechanical sensor, sensor array and method

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

This publication discloses a method for creating nanoscale formations. According to the method, a filler matrix and first nanoparticles embedded in the filler matrix, and two conductive electrodes are superimposed on the insulating material layer. According to the invention, a voltage is applied between the conductive electrodes, a filler matrix is used and first nanoparticles have substantially different electrical properties in order to induce self-organized localized contact creation when said voltage is applied. Potential applications of the invention include e.g. parallel-plate capacitor structures based on metal-oxide nanoparticles, such as memory cells, and high-permittivity/tunable capacitors.

Method of fabricating structures based on nanoparticles

This publication concerns electronics modules comprising at least one first material zone formed of first material which can be structurally transformed by means of electric interaction in order to increase its conductivity at least locally, the first material having a first transformation threshold, and at least one second material zone in the vicinity of the first material zone. According to the invention, the second material zone is formed from second material, which can also be structurally transformed in order to increase its conductivity, the second material having a second transformation threshold, which is lower than the transformation threshold of the first material zone. With the aid of the invention, post-processing electrical programmability and non-volatility of printable memories can be achieved.

Electronic module with conductivity transformation region, method of manufacture and applications thereof

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Helsinki, Finland

Heikki Seppä