Advance Food Technology Co.

Toyohashi, Japan

Advance Food Technology Co.

Toyohashi, Japan
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Tanaka S.,Toyohashi University of Technology | Akai T.,Toyohashi University of Technology | Takemoto M.,Toyohashi University of Technology | Hatsukade Y.,Toyohashi University of Technology | And 5 more authors.
Physica C: Superconductivity and its Applications | Year: 2010

We have developed a magnetic metallic contaminant detector using a high-temperature superconducting quantum interference device (HTS-SQUID) gradiometer for industrial products such as lithium ion batteries. Finding ultrasmall metallic contaminants is a critical issue for manufacturers producing commercial products such as lithium ion batteries. When contamination occurs, the manufacturer incurs a great loss in recalling the tainted products. We employed a permanent ring magnet for magnetizing the products in order to generate remnant fields only at the ends of the products, thereby reducing their impact in masking the field from a contaminant. For practical applications, the detection width of a sensor must be sufficiently large to identify an inclusion from above the product during inspection. Here, we made a large SQUID gradiometer 8 mm in width and compared its detection width with that of a conventional small sensor 3 mm wide. We found that the effective detection width of the 8 mm sensor was 11.6 mm. It was 1.8 times larger than that of the small sensor. Finally, a test of the system's performance revealed that iron particles as small as 50 μm × 50 μm on the electrode of a lithium ion battery could be detected clearly. © 2010 Elsevier B.V. All rights reserved.


Tanaka S.,Toyohashi University of Technology | Ohtani T.,Toyohashi University of Technology | Narita Y.,Toyohashi University of Technology | Hatsukade Y.,Kinki University | Suzuki S.,Advance Food Technology Company
IEEE Transactions on Applied Superconductivity | Year: 2015

In this study, we developed a practical magnetic metallic contaminant detector using three high-Tc RF superconducting quantum interference devices (SQUIDs) for food inspection. Finding small metallic contaminants is important for food safety. When contamination occurs, the manufacturer of the product suffers a great loss to recall the tainted products. Therefore we developed a practical food contaminant detection system based on high-Tc RF SQUIDs. The system was covered with waterproof stainless steel plates, and the outer dimensions of the system were 2450 mm (W) \times 714 mm (D) \times 1555 mm (H). An acceptable inspected object size was 150 mm (W) \times 100 mm (H), which is sufficiently large for practical food inspection. A digital filtering technique has been newly introduced to reduce noise. As a result, the signal-to-noise ratio (SNR) was dramatically improved, and we were able to robustly detect a steel ball as small as 0.3 mm in diameter. © 2002-2011 IEEE.


Tanaka S.,Toyohashi University of Technology | Ohtani T.,Toyohashi University of Technology | Uchida Y.,Toyohashi University of Technology | Hatsukade Y.,Kinki University | Suzuki S.,Advance Food Technology Co.
IEICE Transactions on Electronics | Year: 2015

We report the fabrication of magnetic metallic contaminant detectors using multiple high-Tc SQUIDs (superconducting quantum interference devices) for a lithium-ion battery cathode sheet. Finding ultrasmall metallic foreign matter is an important issue for a manufacturer because metallic contaminants carry the risk of an internal short. When contamination occurs, the manufacturer of the product suffers a great loss from recalling the tainted product. Hence, a detection method of small contaminants is required. Preventing such accidents is also an important issue for manufacturers of industrial products. Given the lower detection limit for practical X-ray usage is in the order of 1 mm, a detection system using a SQUID is a more powerful tool for sensitive inspections. We design and set up an eight-channel roll-to-roll high-Tc dc-SQUID inspection system for a lithium ion battery cathode sheet. We report the evaluation results that the detection of a small φ18 -μm steel particle on a lithium-ion battery cathode sheet was successfully done. Copyright © 2015 The Institute of Electronics, Information and Communication Engineers.


Ohtani T.,Toyohashi University of Technology | Tanaka S.,Toyohashi University of Technology | Narita Y.,Toyohashi University of Technology | Ariyoshi S.,Toyohashi University of Technology | Suzuki S.,Advance Food Technology Co.
Progress in Superconductivity and Cryogenics (PSAC) | Year: 2015

In terms of food safety,mixture of contaminants in food is a serious problem for not only consumers but also manufacturers. In general, the target size of the metallic contaminant to be removed is 0.5 mm. However, it is a difficult task for manufacturers to achieve this target, because of lower system sensitivity. Therefore, we developed a food contaminant detection system based on high-Tc RF superconducting quantum interference devices (SQUIDs), which are highly sensitive magnetic sensors. This study aims to improve the signal to noise ratio (SNR) of the system and detect a 0.5 mm diameter steel ball. Using a real time digital signal processing technique along with analog band-pass filters, we improved the SNR of the system. Owing to the improved SNR, a steel ball with a diameter as small as 0.3 mm, with stand-off distance of 117 mm was successfully detected. These results suggest that the proposed system is a promising candidate for the detection of metallic contaminants in food products. © 2013 PSAC. All rights reserved.


Ohtani T.,Toyohashi University of Technology | Narita Y.,Toyohashi University of Technology | Tanaka S.,Toyohashi University of Technology | Ariyoshi S.,Toyohashi University of Technology | Suzuki S.,Advance Food Technology Co.
2015 IEEE International Magnetics Conference, INTERMAG 2015 | Year: 2015

Mixture of metallic contaminants to food is serious problems not only for consumers but manufactures. To ensure the food safety, finding small metallic contaminants is important. A metal contaminant may come from a machine in the process of food and it contaminates food. Finding small metallic contaminants is important for food safety. Food manufactures are installing inspection systems such as eddy current detectors and X-ray imaging. The eddy current metal detector is widely used in a food factory. However, the sensitivity (threshold level) is not stable and is highly influenced by the conductivity of the material. The X-ray imaging is a useful technique and is getting popular in food factories and other industries. However, the lower detection limit for practical X-ray usage is in the order of 1 mm. Moreover, X-ray radiation sometimes causes ionization of the food, which may often change a taste of the food. © 2015 IEEE.


Tanaka S.,Toyohashi University of Technology | Kitamura Y.,Toyohashi University of Technology | Uchida Y.,Toyohashi University of Technology | Hatsukade Y.,Toyohashi University of Technology | And 2 more authors.
IEEE Transactions on Applied Superconductivity | Year: 2013

In this paper, a roll-to-roll eight-channel (8-ch) high-Tc superconducting quantum interference device (SQUID) detection system for magnetic contaminants in a lithium-ion (Li-ion) battery anode sheet was developed. Finding ultra-small metallic foreign matter is an important issue for a manufacturer because metallic contaminants carry the risk of an internal short. When contamination occurs, the manufacturer of the product suffers a great loss from recalling the tainted product. Metallic particles with outer dimensions smaller than 100 μm cannot be detected using a conventional X-ray imaging system. Therefore, a highly sensitive detection system for small foreign matter is required. We have already developed a detection system based on a single-channel SQUID gradiometer and horizontal magnetization. For practical use, the detection width of the system should be increased to at least 65 mm by employing multiple sensors. In this paper, we present an 8-ch high-Tc SQUID roll-to-roll system for inspecting a Li-ion battery anode with a width of 65 mm. A special microscopic type of a cryostat was developed upon which eight SQUID gradiometers were mounted. As a result, small iron particles of φ35 μm on a real Li-ion battery anode with a width of 70 mm were successfully detected. This system is practical for the detection of contaminants in a Li-ion battery anode sheet. © 2011 IEEE.


Kitamura Y.,Toyohashi University of Technology | Hatsukade Y.,Toyohashi University of Technology | Tanaka S.,Toyohashi University of Technology | Ohtani T.,Advance Food Technology Co. | Suzuki S.,Advance Food Technology Co.
Physics Procedia | Year: 2012

Finding ultra-small metallic contaminants is a big issue for manufacturers of lithium-ion batteries nowadays. Therefore, we have developed high-Tc SQUID systems for detection of such fine magnetic metallic contaminants. In this paper, we constructed an eight channel high-Tc SQUID gradiometer system for inspection of a sheet electrode of a lithium ion battery with width of about 70 mm. By this system, a small iron ball of about 30 ?m in diameter was successfully detected. It is shown that this system has a detectable range of 70 mm in width. These results suggest that the system is a promising tool for the detection of the contaminants in lithium ion batteries. © 2012 Published by Elsevier B.V. Selection and/or peer-review under responsibility of the Guest Editors.


Tanaka S.,Toyohashi University of Technology | Ohtani T.,Toyohashi University of Technology | Uchida Y.,Toyohashi University of Technology | Hatsukade Y.,Toyohashi University of Technology | Suzuki S.,Advance Food Technology Co.
Journal of Superconductivity and Novel Magnetism | Year: 2014

We report the fabrication of magnetic metallic contaminant detectors using multiple high-Tc superconducting quantum interference devices (SQUIDs) for food. Finding small metallic contaminants is important for food safety. People may ingest contaminants that are accidentally mixed in with the food. Hence, a detection method of small contaminants in food is required. Given the lower detection limit for practical X-ray usage is in the order of 1 mm, a detection system using a SQUID is a more powerful tool for sensitive inspections. We design and set up a three-channel high-Tc rf-SQUID inspection system for food. We report the successful detection of a small φ0.3-mm steel particle for the food detection system. © 2014, Springer Science+Business Media New York.


Tanaka S.,Toyohashi University of Technology | Kitamura Y.,Toyohashi University of Technology | Hatsukade Y.,Toyohashi University of Technology | Ohtani T.,Advance Food Technology Co. | Suzuki S.,Advance Food Technology Co.
Journal of Magnetism and Magnetic Materials | Year: 2012

We have developed the magnetic metallic contaminant detectors using multiple high Tc SQUID gradiometers for industrial products. Finding ultra-small metallic contaminants is a big issue for manufacturers producing commercial products. The quality of industrial products such as lithium ion batteries can deteriorate by the inclusion of tiny metallic contaminants. When the contamination does occur, the manufacturer of the product suffers a great loss to recall the tainted products. Metallic particles with outer dimension less than 50 μm cannot be detected by a conventional X-ray imaging. Therefore a high sensitive detection system for small foreign matters is required. However, in most of the cases, the matrix of an active material coated sheet electrode is magnetized and the magnetic signal from the matrix is large enough to mask the signal from contaminants. Thus we have developed a detection system based on a SQUID gradiometer and a horizontal magnetization to date. For practical use, we should increase the detection width of the system by employing multiple sensors. We successfully realized an eight-channel high-Tc SQUID gradiometer system for inspection of sheet electrodes of a lithium ion battery with width of at least 60 to 70 mm. Eight planar SQUID gradiometers were mounted with a separation of 9.0 mm. As a result, small iron particles of less than 50 μm were successfully measured. This result suggests that the system is a promising tool for the detection of contaminants in a lithium ion battery. © 2012 Elsevier B.V.


Tanaka S.,Toyohashi University of Technology | Ohtani T.,Toyohashi University of Technology | Kobayashi T.,Toyohashi University of Technology | Chigasaki T.,Toyohashi University of Technology | And 2 more authors.
2013 IEEE 14th InternationalSuperconductive Electronics Conference, ISEC 2013 | Year: 2013

We propose and demonstrate a high-Tc SQUID(Superconducting Quantum Interference Devises) magnetic metallic contaminant detector using Faraday's law of electromagnetic induction for food and industrial products. For manufacturers producing items such as processed food and industrial products, problems with metallic contaminants are critical issues. The lower detection limit for practical X-ray usage is on the order of 1 mm. A detection system using a SQUID is a powerful tool for sensitive inspections. An iron pellet with a size of 40 μm is successfully detected by the proposed system. © 2013 IEEE.

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