Abstract: A portable facility failure diagnosis device using detection of radiation ultrasonic waves, comprising: an ultrasonic sensor array; a data acquisition board (DAQ board) in which an electronic circuit for acquiring ultrasonic signals at a sampling frequency of the ultrasonic signals sensed by the ultrasonic sensor array is mounted on a substrate of the data acquisition board (DAQ board); a main board in which an operation processing device that processes the ultrasonic signals received from the DAQ board is mounted on the substrate and the processed ultrasonic sound source information to a display device; a data storage medium storing data processed in the operation processing device of the main board; a display device visually displaying the data processed; and an optical camera picking up an image of a direction.

Abstract: A system and method for detecting an air leak in a commercial vehicle can detect an air leaked portion of the commercial vehicle using ultrasonic signals measured by a plurality of measurement sensors. The system includes a detection unit for measuring a plurality of ultrasonic signals generated in the commercial vehicle through the plurality of measurement sensors, confirming a position and size of a leak portion where air is leaked based on the plurality of ultrasonic signals to generate sensing data, and generating a photographed image by photographing the commercial vehicle, a management unit for generating a transformed image using a reference value from the sensing data, and a synthesized image by synthesizing the transformed image and the photographed image, and a display unit displaying the synthesized image.

Abstract: A noise source visualization data accumulation and display device is provided where at two or more acoustic data are generated by beamforming acoustic signals acquired at different moments by using a plurality of microphone arrays and thereafter, one selected among two or more acoustic data or acoustic data processed therefrom is mapped to one optical image to be displayed.

Abstract: An apparatus for measuring noise includes: a signal generator configured to input an input signal having an excitation frequency to an audio device; and a controller configured to measure rattle noise from a sound pressure signal generated in response to the input signal. The controller measures the rattle noise by comparing a frequency component of the sound pressure signal with a masking curve corresponding to the excitation frequency.

Abstract: An acoustic camera for using a MEMS microphone array comprises: an acoustic sensor apparatus (30) comprising a print circuit board (20) on which the plural of MEMS microphone (10) are mounted, to send signals for the detected sound to a data collection unit (40); a data collection unit (40) connected to the acoustic sensor apparatus (30), which samples analog signals related to sound transmitted from the acoustic sensor apparatus (30) to transform into digital signals and transmit them to the central processing unit (40); a central processing unit (50) connected to the data collection unit (40), which calculates noise level based on digital signals related to sound transmitted from the data collection unit (40); and a display unit (60) which is connected to the central processing unit (50), which displays in color the noise level calculated at the central processing unit.

Abstract: A portable sound source searching sensor comprising: a front body (10) in which acoustic sensors of MEMS microphones (20) are arranged to face forward; MEMS microphones (20) of which acoustic sensors are exposed to the front body (10) in a fixed state to the substrate (30); a substrate (30) on which the microphones (20) are mounted; an image photographing unit (40) of which a photographing lens (41) is exposed through a lens hole of the front body (10); and a rear body (50) for surrounding a rear side of the substrate (30) and a rear side of the image photographing unit in a state that the substrate (30) is positioned at a rear side of the front body (10).

Abstract: An acoustic camera for using a MEMS microphone array comprises: an acoustic sensor apparatus (30) comprising a print circuit board (20) on which the plural of MEMS microphone (10) are mounted, to send signals for the detected sound to a data collection unit (40); a data collection unit (40) connected to the acoustic sensor apparatus (30), which samples analog signals related to sound transmitted from the acoustic sensor apparatus (30) to transform into digital signals and transmit them to the central processing unit (40); a central processing unit (50) connected to the data collection unit (40), which calculates noise level based on digital signals related to sound transmitted from the data collection unit (40); and a display unit (60) which is connected to the central processing unit (50), which displays in color the noise level calculated at the central processing unit.

Abstract: A method for measuring and displaying a factor includes: sensing a factor by using a sensing unit, which is movable in a plane, a curved surface, or a space where the factor for sensing is generated or contained and senses the factor; photographing the plane, the curved surface, or the space; simultaneously recognizing a position of the sensing unit by targeting the sound sensing unit when sensing the factor in the step of sensing; generating a factor map data by mapping the factor sensed in the step of sensing onto the position sensed in the step of recognizing; overlaying the factor map data with the picture data; and displaying the factor map data overlaid with the picture data.

Abstract: A method for measuring and displaying a factor includes: sensing a factor by using a sensing unit, which is movable in a plane, a curved surface, or a space where the factor for sensing is generated or contained and senses the factor; photographing the plane, the curved surface, or the space; simultaneously recognizing a position of the sensing unit by targeting the sound sensing unit when sensing the factor in the step of sensing; generating a factor map data by mapping the factor sensed in the step of sensing onto the position sensed in the step of recognizing; overlaying the factor map data with the picture data; and displaying the factor map data overlaid with the picture data.