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A Human Sensing Method Based on 3D Imaging of Outward Ring Scanning Array csar

A three-dimensional imaging and array technology, which is applied in neural learning methods, image generation, image data processing, etc., can solve the problems that the perception effect is greatly affected by environmental factors, the resolution of distance information is low, and the effect is low, so as to improve human perception Dimensions and precision, no violation of personal privacy, and intuitive effects of human body posture

Active Publication Date: 2022-07-22
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0003] At present, the mainstream method for human body perception is based on the combination of optical images captured by optical cameras and image processing algorithms for perception. This method is relatively mature, but the perception effect is greatly affected by environmental factors. The effect is low under weather conditions, and the camera captures a true reflection of real-life scenes, and there is a problem of privacy leakage
The other is a posture recognition method based on Wi-Fi wireless perception. This method mainly uses CSI amplitude information changes for detection, requires a large amount of prior data for training, and its carrier frequency and bandwidth are low, resulting in low resolution of distance information. , the recognition accuracy is low

Method used

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  • A Human Sensing Method Based on 3D Imaging of Outward Ring Scanning Array csar
  • A Human Sensing Method Based on 3D Imaging of Outward Ring Scanning Array csar
  • A Human Sensing Method Based on 3D Imaging of Outward Ring Scanning Array csar

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Embodiment Construction

[0028] Step 1: Arrange m cylindrical turntables with a height of h and a radius of R around the detection area at equal intervals to form a detection system. Each viewing angle starts from the top and arranges radar arrays downward, and each array contains n Radar array elements, and the array element spacing is equal, all radar irradiation directions are perpendicular to the tangent direction of the cylinder, form a depression angle of less than 90° with the ground, and focus on the same area.

[0029] Step 2: All radar transmit signals use the same operating frequency f c, the same carrier bandwidth B, the radar system adopts the one-transmit-multiple-receive mode. The radar element at the top of each array transmits millimeter waves and performs linear frequency modulation to obtain LFM signals with a certain bandwidth. The remaining radars in the array are used for receiving. echo signal. Target to radar maximum elevation angle α max =α 0 , the corresponding elevation a...

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Abstract

The invention discloses a human body attitude perception method based on the three-dimensional imaging of the outer ring scanning array CSAR. The invention intends to meet the needs of real-time personnel posture perception in nursing homes, smart homes and other places, and install a plurality of circular tracks with CSAR working mode radar arrays to scan outwards to form a non-contact three-dimensional human posture perception system. The array rotates uniformly at a certain angular velocity to form an azimuth synthetic aperture to obtain the target azimuth scattering information, transmits the LFM signal bandwidth through the antenna to obtain the target range scattering information, and uses the height linear array to form a real aperture to obtain the target height scattering information. The range, azimuth, and height scattering information is mapped to Cartesian Cartesian coordinate system, and the 3D scattering information image of the human body in the detected area can be reconstructed, and then the multi-view 3D fusion of scattering information can be performed by using the imaging results of different viewing angles, combined with deep learning. , Image detection and recognition technology, realize 360° non-contact three-dimensional perception of human body posture in the monitoring area.

Description

technical field [0001] The invention belongs to the field of electronic signal processing, and relates to a human body perception method based on CSAR three-dimensional imaging of an outer ring scanning array. Background technique [0002] With the development of science and technology and the improvement of quality of life, the application scenarios of non-contact posture sensing technology are becoming more and more extensive. For example, real-time posture recognition of the elderly with inconvenient mobility in nursing homes. When an elderly person falls, the sensing system automatically Identify and judge and issue alarms to remind staff to deal with it; control home appliances and furniture by recognizing human movements or gestures in smart home scenarios; strengthen personnel management by recognizing prisoners' postures in smart prison application scenarios. [0003] At present, the mainstream method for human perception is based on the optical image captured by the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06V40/10G06V10/82G06T17/00G06T3/40G06N3/04G06N3/08
CPCG06T17/00G06T3/4053G06N3/08G06T2200/08G06T2210/61G06V40/23G06N3/044
Inventor 桂术亮吴晓东田增山周牧黄佳敏晏菲
Owner CHONGQING UNIV OF POSTS & TELECOMM
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