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Uchiyama T.,Nagoya University | Mohri K.,Nagoya Industrial Science Research Institute NISRI | Honkura Y.,Aichi Steel | Panina L.V.,University of Plymouth
IEEE Transactions on Magnetics | Year: 2012

We have developed sensitive micro magnetic sensors referred to as MI sensors based on magneto-impedance effect in amorphous wires and CMOS IC electronic circuits providing a sharp-pulse excitation. Micro sized MI-HIC chips have been in mass production of electronic compasses by Aichi Steel Corp. since 2002 for mobile phones and since 2010 for smart phones. Recently we have realized pico-Tesla (10 -8 Oe) resolution for micro MI sensors making use of ultralow intrinsic magnetic noise in amorphous wires with the pulse magnetoimpedance effect. The pico-Tesla MI sensor is useful especially for bio-magnetic measurements without any magnetic shielding at room temperature. In order to avoid a risk of traffic accident due to noise reduction electric vehicles, an alert system for the pedestrians having a smart phone would be useful, if pico-Tesla MI sensor were built in the smart phones. © 2012 IEEE. Source


Mohri K.,Nagoya Industrial Science Research Institute NISRI | Inden Y.,Nagoya University | Yamada M.,Meijo University | Mohri Y.,Yamazaki Mazak Corporation
Progress in Electromagnetics Research Symposium | Year: 2012

A remarkable health recovery effect of the physiological magnetic stimulation (PMS) for an elder person suffered from the angina pectoris is presented, in which four conditions out of five indices of the metabolic syndrome were normalized through two months. The PMS is carried out using a magnetized fayalite crushed stones crammed vinyl pipe with vibrating on the immunity source area of the thymus, the pit of the stomach, and the intestinal flora ("san jiao" in Chinese medicine). Mechanisms for the PMS effect are discussed with the magneto- protonics principle considering transition of the measured electro-encephalogram (EEG) and the electro-cardiogram (ECG) before and during the PMS. Source


Mohri Y.,MI Institute | Yamada M.,Meijo University | Sakai K.,Meijo University | Kato W.,Meijo University | And 2 more authors.
Progress in Electromagnetics Research Symposium | Year: 2013

A new effective and safe arousal method is presented for car drivers with application of a physiological magnetic stimulation (PMS) to their pit of the stomach using a magnetic necklace-pendant made of magnetized olivine sintered particles. A relatively large magnetic field generated from the pit of the stomach was detected using the pico-Tesla resolution MI magnetic sensor, which is remarkably changed in the time series pattern with application of the PMS. The arousal effect was evaluated considering a transition of the defined arousal index of (α+β)=(δ+θ) for detected four points electroencephalogram (EEG) for 8 subjects before and after application of the PMS on a driving simulator. Arousal effect for 15 subjects with the spine PMS was also evaluated. Copyright © 2013 The Electromagnetics Academy. Source


Mohri K.,Nagoya Industrial Science Research Institute NISRI | Sasaki M.,Shinchita Concrete Kogyo Corporation | Uemura T.,Tsuruta Sekizai Corporation | Mohri Y.,MI Institute | And 2 more authors.
Progress in Electromagnetics Research Symposium | Year: 2013

A new method for production of the high-strength concrete using the magnetized olivine stone as the aggregate is presented, which revealed a compressive strength of around 85N/mm2 at 13 weeks measurement. The alternative pulse train distributed magnetic field generated from the high strength concrete increased its density and strength with promotion of the solidification due to a possible inverse magnetostrictive effect of the magnetite, which promoted further the concrete solidification (positive feedback). An example of growth promotion of a plant on the concrete board is shown with the bio-activation magnetic field due to the magnetoprotonics principle. The electromagnetic microwave interception efficiency of the high-strength mortar is more than 2 times higher than that of non-magnetized mortar. Copyright © 2013 The Electromagnetics Academy. Source


Mohri K.,Nagoya Industrial Science Research Institute NISRI | Mohri K.,Aichi Micro Intelligent Corporation | Fukushima M.,Foundation for Biomedical Research and Innovation | Mohri Y.,Meijo University | Mohri Yu.,Meijo University
Progress in Electromagnetics Research Symposium | Year: 2010

We constructed an extremely sensitive magnetic sensor having one pico-Tesla res- olution using single amorphous wire core CMOS IC magneto-impedance sensor with dc selective negative feedback circuitry ("pT-MI sensor") for detection of the water magnetization. The water magnetization M is measured using a pendulum oscillation sample magnetic measure- ment method, in which a water sample bottle of 100 ml oscillates as a pendulum with 1.5 Hz in front of the pT-MI sensor head at 50mm apart position showing 3 Hz magnetic field sinusoidal wave. Sample water (purified water and tap water) with 6 Hz, 10 μT magnetic field application through more than 1 hour showed a clear 3 Hz sinusoidal wave output of around 1 nT amplitude (M = 2:3 pT) during at least 30 min. and not for samples without ac magnetic field application and also magnet dc field application. Mechanism of water magnetization has been proposed with an assumption of the cyclotron resonance of the water cluster (H 3O+(H2O)n) which activates the proton transport in water under the geo-magnetic field ("magneto-protonics"). Source

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