MULTI-SPOT CONTAMINANT DETECTION WITH MAGNETOSTRICTIVE SENSORS

In at least one illustrative embodiment, a method for contaminant detection includes distributing multiple magnetostrictive sensors on a nonmagnetic index plate. The index plate includes multiple wells formed in a top surface that are each sized to receive a magnetostrictive sensor. The method furth...

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Bibliographische Detailangaben
Hauptverfasser:	Chin Bryan A, Best Stevie R, Wang Fengen, Chen I-Hsuan, Wikle Howard C, Horikawa Shin, Liu Yuzhe, Cheng Zhongyang, Hu Jiajia
Format:	Patent
Sprache:	eng
Schlagworte:	FOODS OR FOODSTUFFS FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BYSUBCLASSES A23B - A23J HUMAN NECESSITIES INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLIDMATERIALS OR FLUIDS MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROMSOLID MATERIALS OR FLUIDS MEASURING MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL METERING BY VOLUME PERFORMING OPERATIONS PHYSICS PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS TESTING THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OFNUTRITIVE QUALITIES, PHYSICAL TREATMENT THEIR TREATMENT, NOT COVERED BY OTHER CLASSES TRANSPORTING
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Beschreibung
Zusammenfassung:	In at least one illustrative embodiment, a method for contaminant detection includes distributing multiple magnetostrictive sensors on a nonmagnetic index plate. The index plate includes multiple wells formed in a top surface that are each sized to receive a magnetostrictive sensor. The method further includes placing a magnetic backing plate below the index plate, inverting the index plate and the magnetic backing plate, and then placing the inverted index plate on a sample surface. The sample surface may be two-dimensional food such as fresh vegetable leaves. The method may further include placing the index plate and the magnetic backing plate on a nonmagnetic cover plate that is positioned above a sensor coil. The method further includes removing the magnetic backing plate, removing the index plate, and applying a varying magnetic field with the sensor coil to a magnetostrictive sensor positioned on the cover plate. Other embodiments are described and claimed.