Patents by Inventor Timo Varpula
Timo Varpula has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11166662Abstract: 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.Type: GrantFiled: March 14, 2017Date of Patent: November 9, 2021Assignee: VITALSIGNUM OYInventors: Timo Varpula, Panu Helistö
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Publication number: 20190082987Abstract: 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.Type: ApplicationFiled: March 14, 2017Publication date: March 21, 2019Inventors: Timo VARPULA, Panu HELISTÖ
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Patent number: 9476975Abstract: 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.Type: GrantFiled: March 29, 2012Date of Patent: October 25, 2016Assignee: Teknologian Tutkimuskeskus VTTInventors: Ville Viikari, Heikki Seppä, Tomi Mattila, Ari Alastalo, Mark Allen, Timo Varpula
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Patent number: 9043992Abstract: This document describes a method and system for object localization. In accordance with the method an object (1) is illuminated by at least one first type of signal, and response of the signal is detected. In accordance with the invention the object (1) equipped with a transponder (2, 3) backscattering the first type of signal, the transponder (2, 3) is illuminated also by a second type of signal affecting to the backscattering frequency of the transponder (2, 3), and the backscattered signal from the transponder (2, 3) is detected in order to localize the object.Type: GrantFiled: October 19, 2010Date of Patent: June 2, 2015Assignee: Teknologian Tutkimuskeskus VTTInventors: Ville Viikari, Heikki Seppä, Kaj Nummila, Timo Varpula
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Patent number: 8525647Abstract: The invention relates to a measuring system for detecting radio-frequency tags, a measuring method, and a new use for a leaky waveguide. The measuring system comprises a reading device and an antenna, which is connected to reading device for connecting to the tags. According to the invention, the antenna is a microstrip-type leaky waveguide having a length which is several times the operating wavelength of the tags. The invention permits reliable and precise RFID detection, for example, for a results service for sports events.Type: GrantFiled: June 30, 2006Date of Patent: September 3, 2013Assignee: Valtion Teknillinen TutkimiskeskusInventors: Timo Varpula, Kaj Nummila, Kaarle Jaakkola, Pentti Lajunen
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Publication number: 20120306683Abstract: This document describes a method and system for object localization. In accordance with the method an object (1) is illuminated by at least one first type of signal, and response of the signal is detected. In accordance with the invention the object (1) equipped with a transponder (2, 3) backscattering the first type of signal, the transponder (2, 3) is illuminated also by a second type of signal affecting to the backscattering frequency of the transponder (2, 3), and the backscattered signal from the transponder (2, 3) is detected in order to localize the object.Type: ApplicationFiled: October 19, 2010Publication date: December 6, 2012Applicant: TEKNOLOGIAN TUTKIMUSKESKUS VTTInventors: Ville Viikari, Heikki Seppä, Kaj Nummila, Timo Varpula
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Publication number: 20120235847Abstract: 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.Type: ApplicationFiled: March 29, 2012Publication date: September 20, 2012Applicant: Teknologian tutkimuskeskus VTTInventors: Ville Viikari, Heikki Seppä, Tomi Mattila, Ari Alastalo, Mark Allen, Timo Varpula
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Publication number: 20120046571Abstract: The present publication discloses a method for detecting ethanol, in which method the ethanol content of a person is measured. According to the invention, the ethanol content is measured from the person's skin, using a capacitive measurement method.Type: ApplicationFiled: February 23, 2010Publication date: February 23, 2012Applicant: Teknologian tutkimuskeskus VTTInventors: Timo Varpula, Aarne Oja, Heikki Seppa, Mika Suhonen
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Patent number: 7770443Abstract: The present invention relates to a power feeding arrangement for electric loads (R) positioned in tires (20) of vehicles. According to the invention the arrangement comprises at least one feed coil (Lf) arranged in the vehicle (10), at least one receiver coil (Lr) arranged in the tire (20), and at least one load (R) electrically coupled to the receiver coil (Lr).Type: GrantFiled: December 17, 2004Date of Patent: August 10, 2010Assignee: Valtion Teknillinen TutkimuskeskusInventors: Timo Varpula, Kaarle Jaakkola
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Patent number: 7714593Abstract: A sensor arrangement for a sensor arrangement remotely readable by radio frequencies. The sensor arrangement includes an LC resonator that includes a capacitor and a coil, and a sensor element coupled to the LC resonator whose properties change as a function of a measurable quantity. A sensor element according to the invention does not form a direct galvanic contact with the LC resonator, rather the coupling is implemented capacitively or inductively.Type: GrantFiled: December 16, 2004Date of Patent: May 11, 2010Assignee: UPM-Kymmene CorporationInventors: Timo Varpula, Heikki Seppä, Juha-Matti Saari
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Publication number: 20090160612Abstract: The invention relates to a measuring system for detecting radio-frequency tags, a measuring method, and a new use for a leaky waveguide. The measuring system comprises a reading device and an antenna, which is connected to reading device for connecting to the tags. According to the invention, the antenna is a microstrip-type leaky waveguide having a length which is several times the operating wavelength of the tags. The invention permits reliable and precise RFID detection, for example, for a results service for sports events.Type: ApplicationFiled: June 30, 2006Publication date: June 25, 2009Applicant: Valtion Teknillinen TutkimuskeskusInventors: Timo Varpula, Kaj Nummila, Kaarle Jaakkola, Pentti Lajunen
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Publication number: 20090058603Abstract: This publication discloses an RFDD reading apparatus (1) and a method for the reading apparatus. The RFID reading apparatus comprises a transmitter (3), which is arranged to feed power to at least one RFED tag (2) in the vicinity of the RFID reading apparatus (1), and a receiver (4) operating on the frequency of the transmitter (3), so that the transmitter (3) and the receiver (4) are in operation simultaneously and the receiver (4) is arranged to receiver through a radio channel (7) a reflected signal of at least one RFDD tag (2) in the vicinity of the reading device. In accordance with the invention, the RFDD reading apparatus (1) comprises additionally means (Z2, 12, 13, 14, 20) for separating the payload signal arriving from the RFDD tag (2) from signals other than those arriving from the RFDD tag (2).Type: ApplicationFiled: June 20, 2006Publication date: March 5, 2009Applicant: Valtion Teknillinen TutkimuskeskusInventors: Heikki Seppa, Timo Varpula, Pekka Pursula, Mikko Kiviranta
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Publication number: 20070241762Abstract: A sensor arrangement for a sensor arrangement remotely readable by radio frequencies. The sensor arrangement includes an LC resonator that includes a capacitor and a coil, and a sensor element coupled to the LC resonator whose properties change as a function of a measurable quantity. A sensor element according to the invention does not form a direct galvanic contact with the LC resonator, rather the coupling is implemented capacitively or inductively.Type: ApplicationFiled: December 16, 2004Publication date: October 18, 2007Applicant: UPMKYMMENE CORPORATIONInventors: Timo Varpula, Heikki Seppa, Juha-Matti Saari
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Patent number: 7259555Abstract: This publication discloses a method and arrangement for determining the hardening depth of steel or other ferromagnetic substances without breaking the object being measured. According to the invention, a varying magnetic field, which causes magnetic Barkhausen noise (MBN), is created in the measurement object with the aid of a magnetization coil 13. The varying magnetic field is regulated in such a way that the maximum force of the magnetic field does not exceed the coercitive force of the unhardened part of the measurement object. The MBN caused is measured with the aid of an MBN sensor. The measured signal is filtered and Fourier transformed. The signal in the frequency range is integrated over a suitable frequency band, in order to determine the value depicting the energy of the MBN. This value correlates with the hardening depth and on the basis of this value it is thus possible to determine the hardening depth.Type: GrantFiled: January 9, 2003Date of Patent: August 21, 2007Assignee: Stresstech OyInventors: Kaj Nummila, Heikki Seppä, Timo Varpula
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Publication number: 20070119636Abstract: The present invention relates to a power feeding arrangement for electric loads (R) positioned in tires (20) of vehicles. According to the invention the arrangement comprises at least one feed coil (Lf) arranged in the vehicle (10), at least one receiver coil (Lr) arranged in the tire (20), and at least one load (R) electrically coupled to the receiver coil (Lr).Type: ApplicationFiled: December 17, 2004Publication date: May 31, 2007Applicant: VALTION TEKNILLINEN TUTKIMUSKESKUSInventors: Timo Varpula, Kaarle Jaakkola
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Publication number: 20050242803Abstract: This publication discloses a method and arrangement for determining the hardening depth of steel or other ferromagnetic substances without breaking the object being measured. According to the invention, a varying magnetic field, which causes magnetic Barkhausen noise (MBN), is created in the measurement object with the aid of a magnetization coil 13. The varying magnetic field is regulated in such a way that the maximum force of the magnetic field does not exceed the coercitive force of the unhardened part of the measurement object. The MBN caused is measured with the aid of an MBN sensor. The measured signal is filtered and Fourier transformed. The signal in the frequency range is integrated over a suitable frequency band, in order to determine the value depicting the energy of the MBN. This value correlates with the hardening depth and on the basis of this value it is thus possible to determine the hardening depth.Type: ApplicationFiled: January 9, 2003Publication date: November 3, 2005Inventors: Kaj Nummila, Heikki Seppa, Timo Varpula
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Publication number: 20040246102Abstract: The present publication discloses a method for implementing a remote identification device (RFID). According to the method, a reader device sends a modulated carrier to a remote identification device or a remote sensor (20). According to the invention, a reply signal synchronized with the modulation of the carrier signal received by the remote identification device or remote sensor (20) is generated using the energy of the incident carrier signal.Type: ApplicationFiled: July 7, 2004Publication date: December 9, 2004Inventors: Olli Jaakkola, Timo Varpula
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Patent number: 6049211Abstract: A method and apparatus for determination of orientation of fibers in a material such as a paper or paperboard web comprised of elongated fibers of high moisture content. The material is subjected to an alternating electric field (E) of the RF or microwave frequency range lying in the plane of the material and the change caused by the presence of the material in the alternating electric field (E) is measured. The direction of the alternating electric field (E) is altered during the measurement, whereby the material need not be rotated with respect to the resonator for the measurement.Type: GrantFiled: December 18, 1997Date of Patent: April 11, 2000Assignee: Valmet AutomationInventors: Timo Varpula, Heikki Seppa
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Patent number: 5824914Abstract: The invention relates to a method and arrangement for measuring using magnetic flow measurement, the flow velocity of a liquid, particularly water. In the solution according to the invention, a component that is in the same phase with the magnetic field is measured from the sinusoidal voltage induced in the electrodes. The solution according to the invention can be utilized, for example, in measuring the flow velocity of water flowing in a water pipeline.Type: GrantFiled: March 7, 1997Date of Patent: October 20, 1998Assignee: Oras OyInventors: Heikki Seppa, Timo Varpula, Arto Sakari Sunila, Janne-Yrjo Antola