Development of Metallic Contaminant Detection System Using RF High-Tc SQUIDs for Food Inspection

Tanaka, Saburo; Ohtani, Takeyoshi; Narita, Y.; Hatsukade, Yoshimi; Suzuki, Shuichi

doi:10.1109/tasc.2014.2361893

Cited by 12 publications

(8 citation statements)

References 12 publications

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“…The sample is then moved under an electromagnetic shield where a magnetometer measures any remnant magnetic fields from the magnetized particles in the sample. Adapted from [98].…”

Section: Magnetic Methodsmentioning

confidence: 99%

“…SQUID sensors are the most sensitive sensors to magnetic fields in a wide frequency range, from DC fields to frequencies up to a few GHz [177], and have achieved the detection of a single ∼ 120 nm nanoparticle [181] placed near the edge of the sensor. The SQUID sensor has been applied in biosensing [182]- [185], magnetic resonance imaging [177], [186], food inspection [98] and industrial product control [187]. [187] detected a 0.09 mm stainless steel particle in industrial products with and without aluminum wrapping.…”

Section: Magnetic Methodsmentioning

confidence: 99%

“…[187] detected a 0.09 mm stainless steel particle in industrial products with and without aluminum wrapping. [98] used three high-Tc RF SQUID sensors for finding small steel particles with 0.3 to 0.8 mm diameters in food in sample volumes up to 150 mm (W) × 100 mm (H). The standoff distance was 117 mm, the conveyor moved at 20 m/min, and the signal was approximately proportional to the volume of the particle in the studied range of sizes.…”

Section: Magnetic Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Metal Particle Detection Methods and Their Use for Freeze-Dried Vaccine Inspection: A Review

Jedlicki,

Tellbach,

Subirana

2024

IEEE Sensors J.

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We establish a set of metal particle detection methods that are suitable for automated inspection of freeze-dried vaccines. We first identify the requirements for freeze-dried vaccine inspection. We then assess metal particle detection methods obtained through a comprehensive literature review with the requirements for automated inspection. In particular, we find inductive sensors, superconducting quantum interference device (SQUID)-based sensors, giant magnetoresistive (GMR)/tunneling magnetoresistive (TMR)-based sensors, THz imaging, hyperspectral imaging, thermal imaging, X-ray inspection, and radio frequency identification (RFID)-based sensors promising for automated inspection of freeze-dried vaccines. However, experiments assessing the applicability of these methods for freeze-dried vaccine inspection are severly limited and future research is required to choose the best performing methods.

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“…The sample is then moved under an electromagnetic shield where a magnetometer measures any remnant magnetic fields from the magnetized particles in the sample. Adapted from [98].…”

Section: Magnetic Methodsmentioning

confidence: 99%

Section: Magnetic Methodsmentioning

confidence: 99%

Section: Magnetic Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Metal Particle Detection Methods and Their Use for Freeze-Dried Vaccine Inspection: A Review

Jedlicki,

Tellbach,

Subirana

2024

IEEE Sensors J.

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“…If the food products are contaminated by magnetic metals, their residual magnetization disrupts the magnetic field as they pass under the SQUIDs, and this variation in the magnetic field is detected by the SQUIDs [5].…”

Section: Configuration and Specifications Of Equipmentmentioning

confidence: 99%

Development of Contaminant Detection System using HTS SQUIDs

Ohtani¹,

Tanaka²,

Narita³

et al. 2015

Progress in Superconductivity and Cryogenics

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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.

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“…In recent years, detection systems based on superconducting quantum interference devices (SQUIDs) have been proposed and developed. This detection technique is based on recording the remnant mag- netic field of a contaminant using SQUID sensors [1]- [5].…”

Section: Introductionmentioning

confidence: 99%

Prototype of Multi-Channel High-Tc SQUID Metallic Contaminant Detector for Large Sized Packaged Food

Tanaka

Ohtani

Krause

2017

IEICE Trans. Electron.

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SUMMARYWe report on the fabrication of a magnetic metallic contaminant detector using multi-channel high-Tc RF-SQUIDs (superconducting quantum interference devices) for large packaged food. For food safety finding small metallic contaminants is an important issue for a food manufacturer. Hence, a detection method for small sized contaminants is required. Some detection systems for food inspection using high-Tc SQUIDs have been reported to date. The system described here is different from the previous systems in its permitted size for inspection, being larger at 150 mm in height × 300 mm in width. For inspection of large sized food packages, improvement of the signal to noise ratio (SNR) is an important issue because the signal intensity is inversely proportional to the cube of the distance between the SQUID sensor and the object. Therefore a digital filter was introduced and its parameters were optimized. As a result, a steel ball as small as 0.5 mm in diameter at a stand-off distance of 167 mm was successfully detected with more than SNR = 3.3.

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Development of Metallic Contaminant Detection System Using RF High-Tc SQUIDs for Food Inspection

Cited by 12 publications

References 12 publications

Metal Particle Detection Methods and Their Use for Freeze-Dried Vaccine Inspection: A Review

Metal Particle Detection Methods and Their Use for Freeze-Dried Vaccine Inspection: A Review

Development of Contaminant Detection System using HTS SQUIDs

Prototype of Multi-Channel High-Tc SQUID Metallic Contaminant Detector for Large Sized Packaged Food

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