Abstract: A device for detecting whether a plurality of electronic components having one or more defective electronic components includes: an energy source generating energy and transferring the generated energy to the plurality of electronic components in a non-contact manner to cause the plurality of electronic components to vibrate; a mechanical resonance detector detecting vibration resonances of the plurality of electronic components; and a post-processing processor comparing the detected vibration resonances of the plurality of electronic components with a reference vibration resonance of a normal product to determine whether the plurality of electronic components have one or more defective electronic components and then extracting determined information.

Abstract: The present disclosure relates to an apparatus and a method for measuring a moisture content of a compressed recycled paper bale, and the apparatus includes: an impact unit 20 which applies impact to the compressed recycled paper bale 1, and vibrates the compressed recycled paper bale 1; an acceleration sensor unit 30 which is attached to the compressed recycled paper bale 1, and detects acceleration of the compressed recycled paper bale 1 vibrated by the impact unit 20; and a control device 10 which detects a moisture content of the compressed recycled paper bale 1 by receiving a detection result from the acceleration sensor unit 30, and comparing the detection result with a vibration model of the compressed recycled paper bale.

Abstract: The present disclosure relates to an apparatus and a method for measuring a moisture content of a compressed recycled paper bale, and the apparatus includes: an impact unit 20 which applies impact to the compressed recycled paper bale 1, and vibrates the compressed recycled paper bale 1; an acceleration sensor unit 30 which is attached to the compressed recycled paper bale 1, and detects acceleration of the compressed recycled paper bale 1 vibrated by the impact unit 20; and a control device 10 which detects a moisture content of the compressed recycled paper bale 1 by receiving a detection result from the acceleration sensor unit 30, and comparing the detection result with a vibration model of the compressed recycled paper bale.

Abstract: Provided is a 2-dimensional virtual array probe for 3-dimensional ultrasonic imaging. The probe includes: an ultrasonic transducer; a metallic probe body including an ultrasonic wave emission surface in which a plurality of wave-guides are arranged in 2-dimensional array and a ? sphere-shaped recess for irregularly reflecting ultrasonic wave emitted from the ultrasonic transducer in an inside thereof; a piezoelectric sheet arranged on the ultrasonic wave emission surface to make contact with an object to be inspected and configured to pass the ultrasonic waves emitted from the probe toward the object to be inspected and output a signal by detecting the ultrasonic waves reflected from the object to be detected; and a control unit configured to control the ultrasonic transducer so that the plurality of wave-guides sequentially generate ultrasonic wave.

Abstract: The present application discloses a method of estimating a surface temperature of an ultrasound probe having a plurality of transducer elements and a surface, involving: a) establishing a temperature rise function of the surface of the ultrasound probe due to a single active transducer element; b) selecting one of the transducer elements; c) applying a single transmission pulse signal to the selected transducer element such that the selected transducer element operates once; d) measuring a temperature rise of the surface of the ultrasound probe at predetermined positions on the surface thereof; e) completing the temperature rise function based on the measured temperature rise; and f) estimating a temperature rise of the surface of the ultrasound probe based on the temperature rise function.

Abstract: The present application discloses a method of estimating a surface temperature of an ultrasound probe having a plurality of transducer elements and a surface, involving: a) establishing a temperature rise function of the surface of the ultrasound probe due to a single active transducer element; b) selecting one of the transducer elements; c) applying a single transmission pulse signal to the selected transducer element such that the selected transducer element operates once; d) measuring a temperature rise of the surface of the ultrasound probe at predetermined positions on the surface thereof; e) completing the temperature rise function based on the measured temperature rise; and f) estimating a temperature rise of the surface of the ultrasound probe based on the temperature rise function.