40 results about "Acoustic camera" patented technology

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.

The invention discloses a diagnosis and improvement method for low-frequency abnormal sound of an air conditioning compressor under an idling working condition of a blade electric vehicle. The diagnosis and improvement method mainly comprises the following steps that abnormal sound sources are analyzed, and through simulating calculation and spectral analysis, a sound source part is determined preliminarily; then a final sound source part is determined by adopting an acoustic camera imaging technology; then sound source noise analysis is performed, specifically, noise time domain and frequencydomain analysis, sound filter analysis and sound quality analysis are involved; a rotor shaft vibration frequency response test is performed on air conditioning compressors of the blade electric vehicle and a competitive vehicle model, and a structure which generates the noise of the blade electric vehicle is determined; then, a rotor shaft starting control strategy of the air conditioning compressor of the blade electric vehicle is adjusted, and rotor shaft positioning starting is changed to rotor shaft non-positioning starting; and finally, improvement is performed in two aspects of the structure design and the manufacturing machining technology of the air conditioning compressor of the blade electric vehicle. According to the diagnosis and improvement method, the abnormal noise of theair conditioning compressor can be effectively detected and lowered.

The invention relates to a high precision acoustic sensing device using a microphone array. A plurality of MEMS microphones (10) are arranged in a printed circuit board (20). The invention also relates to an acoustic camera using the microphone array, comprising an acoustic sensing device (30) arranged on the printed circuit board (20) by the plurality of microphones (10); a data collection part (40) for sampling analog signals related with the acoustic sound from the acoustic sensing device (30) and converting the analog signals into digital signals and sending out the digital signals to a central processor (50); the central processor (50) for calculating noise levels respectively related with each microphone (10); a display part (60) for displaying the noise levels respectively related with each microphone (10) and calculated by the central processor (50) in different colors. The high precision acoustic sensing device and the acoustic camera using the microphone array can be used for electronic equipment produced by the existing microphones, such as mobile phones.

The invention relates to a novel multiple spectra acoustic camera and an identification method. The novel multiple spectra acoustic camera is used for ultrasonically imaging and identifying human body or object under a complex environment so as to identify the human body and object information. The novel multiple spectra acoustic camera comprises a hardware component and an image processing component; the hardware component comprises a fixing plate and an ultrasonic generator array and a receiver array which are arranged on the fixing plate; the ultrasonic generator array and the receiver array are simultaneously connected with a collecting processing circuit; the image processing component comprises an emitting / collecting processing module and an imaging and identifying processing module. The invention has the following advantages: 1) the novel multiple spectra acoustic camera can be used for detecting under a bad optical environment, such as night, has wider practicability and can work under a complex working condition; 2) the state information of human body and object can be acquired in real time through imaging and identification according to the invention and the worker can conveniently observe and treat; 3) due to the special nature that the ultrasonic wave is different from the optics, a human body image formed by an ultrasonic camera contains no excessive privacy information and has higher confidentiality.

It is provided a system for localizing a sound source and a method therefor. The system includes a movable unit, being adapted for free movement and being integrated with a microphone; a motion tracking unit; and a processing unit, being adapted for receiving microphone signal and motion tracking unit signal and obtaining information on a direction from which sound from the sound source arrives using the microphone signal and motion tracking unit signal obtained during movement of the movable unit. By having the system and the method therefor, it is helpful for solving at least one of the technical problems: the complexity and a large volume of an acoustic camera for localization of a sound source; the restriction of the movement of the microphone in a sound source localization system.

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.

The present invention discloses an acoustic camera which comprises an array of arranged microphones. The microphone arrangement can be organized in planar or non-planar form. The device can be handheld, and it comprises a touch screen for interacting with the user. The acoustic camera measures acoustic signal intensities in the pointed direction and simultaneously takes an optical image of the measured area, and shows the acoustic signal strengths with the taken image on the screen. The device analyzes the acoustic signals and makes a classification for the sound based on the analysis. If necessary, an alarm is given by the acoustic camera. Besides the handheld manual use, the device can be fixed on a immobile structure or fixed to a movable or rotatable device or a vehicle, such as to a drone.

The invention relates to a vehicle chassis noise problem source positioning system and positioning method. The method is characterized in that the relative movement of a chassis sound pickup row formed by more than two chassis sound pickups arranged side by side in the width direction of a vehicle body relative to a vehicle chassis directly above in the vehicle length direction is acquired to detect sound intensity of each part of the vehicle chassis, and the noise problem source location of the vehicle chassis is determined by a data processor based on the value picked up by the chassis soundpickup row and vehicle length and width values inputted previously. The method is advantaged in that sound intensity distribution of the vehicle chassis can be detected through the chassis sound pickup row formed by more than two chassis sound pickups arranged side by side in the width direction of the vehicle body in cooperation with the data processor, the noise problem source location of the vehicle chassis is determined in combination with the vehicle length and width values inputted previously into the data processor, an acoustics camera in the prior art is replaced, not only the structure is simple, but also cost is quite low, and practicality is strong.

The invention provides an acoustic field reconstruction plane confirming method in an acoustic camera system, belonging to the noise analysis and control technical field. First of all, sign points are pasted on the moving object to be tested; the synchronous images in two cameras in the system go through sign point identification through a template matching method, and the identified result is matched to find the corresponding image-point pairs; the matched image-point pairs are space-oriented through a binocular stereo vision method to obtain the coordinates of the sign points corresponding to the selected coordinate system; then a spatial plane of the sign points is calculated, and the plane serves as the reconstruction plane of the acoustic field. The method provides acoustic field reconstruction plane parameters for the acoustic camera system, and establishes the basis for the integration of the acoustic field images and the video images.

The invention relates to the technical field of robots and especially relates to a belt conveyor post robot. The robot comprises a robot shell, a remote control terminal, a double-vision high-definition camera, an acoustic camera, a multi-parameter gas sensor and a control circuit, wherein the center of the bottom of the robot shell is sunken to form a mounting part, a first mounting position is further arranged at the bottom of the robot shell, and the double-vision high-definition camera is arranged on the mounting part and used for collecting visual images and thermal imaging data in real time; the acoustic camera is arranged on the first mounting position and is used for accurately positioning a sound source; and the multi-parameter gas sensor is arranged on the first mounting positionand is used for acquiring various gas data in real time. Working efficiency can be improved, labor cost is reduced, and the probability of work errors is reduced.

An acoustic camera comprises a first sound pick-up device, a second sound pick-up device, and a switch. The switch is respectively connected to the first sound pick-up device and the second pick-up device and used to select the first sound pick-up device or the second sound pick-up device to reconstruct the sound field of the sound source of a detected object. The first sound pick-up device has a first microphone array, and the first microphone array is a near-field uniform microphone array. The second sound pick-up device has a second microphone array, and the second microphone array is a far-field non-uniform microphone array.

Apparatus for generating accurate 3-dimensional images of objects immersed in liquids including optically opaque liquids which may also have significant sound attenuation, is described. Sound pulses are caused to impinge on the object, and the time-of-flight of the reflected sound is used to create a 3-dimensional image of the object in almost real-time. The apparatus is capable of creating images of objects immersed in fluids that are optically opaque and have high sound attenuation at resolutions less than about 1 mm. The apparatus may include a piezoelectric transducer for generating the acoustic pulses; a high-density polyethylene compound acoustic lens, a 2-dimensional segmented piezoelectric detecting array positioned behind the lens for receiving acoustic pulses reflected by the object, the electric output of which is directed to digital signal processing electronics for generating the image.