Fujitsu Corporation

Hongchun Li

Jun Tian

Qian Zhao

Lili Xie

Yi Xu

Genming Ding

Chen Ao

Embodiments of this disclosure provide a motion state detection apparatus and method based on wireless signals and a system, in which variations of energy distribution of reflection points with time are calculated according to wireless signals reflected from a space where an object that is detected is located, and a motion state of the object is determined according to the variations. Thus, the training of the recognition model is not needed, the detection process is simple and detection results are reliable, and are applicable to various different application scenarios.

Motion state detection apparatus and method based on wireless signals and system

Embodiments of this disclosure provide a radar-based posture recognition apparatus, method and an electronic device. The method includes: acquiring radar reflection point information based on radar echo signals reflected from a detected target, and clustering radar reflection points; in a first time period, calculating spatial morphological feature information and/or motion feature information of a target point set obtained by clustering; in a second time period, counting the spatial morphological feature information and/or the motion feature information of a plurality of first time periods to obtain motion process feature information in the second time period; and taking the motion process feature information within a second time period in which a current moment is present and the spatial morphological feature information and/or the motion feature information in a first time period in which the current moment is present as a feature set, to determine the posture of the detected target.

Radar-based posture recognition apparatus and method and electronic device

Embodiments of this disclosure provide a living object detection method and apparatus and electronic device. The apparatus includes a processor to calculate a distance matrix according to variance of Fourier transform amplitude values of radio signals received by a radio signal receiver within a determined period of time; and to calculate a distance between an object among objects and the radio signal receiver according to the distance matrix. According to this disclosure, a position of a living object among the objects may be detected based upon the distance in multiple scenarios.

Living object detection method and apparatus and electronic device

Embodiments of this disclosure provide a fall detection method and apparatus. The apparatus acquires information of radar reflection points belonging to a detected object in a predetermined number of consecutive frames, information on a radar reflection point including at least two of information on a position, information on a radial velocity and information on reflection signal strength, of the reflection point; determines whether the detected object has fallen according to a relationship between time and the information on radar reflection points in the predetermined number of consecutive frames.

Fall detection method and apparatus

A method and apparatus for selecting a position of a routing node and terminal equipment where the method includes: generating a connection relationship among sensor nodes, a gateway node and deployable routing nodes according to network deployment information and a link quality model related to a deployment environment; and calculating a shortest path from each sensor node to the gateway node according to the connection relationship, and determining deployable positions of routing nodes on the shortest path as positions of the routing nodes. With the embodiments of this disclosure, in selecting a position of a routing node, an effect of a deployment environment and limit of a deployment position are taken into account, thereby obtaining a routing node deployment scheme satisfying a practical environment and ensuring network data transmission performance.

Method and apparatus for selecting position of routing node and terminal equipment

A method and apparatus for determining a position of a routing node and terminal equipment. Where the method includes: generating a 0-th generation routing node deployment scheme set according to a link connection relationship among sensor nodes, a gateway node and deployable routing nodes in a network; calculating a fitness of each routing node deployment scheme in a j-th generation routing node deployment scheme set; processing the j-th generation routing node deployment scheme set according to the fitness; and selecting a routing node deployment scheme from the routing node deployment scheme set satisfying the predetermined condition. In determining a position of a routing node, optimizing the number of routing nodes and optimizing routing paths are both taken into account, thereby obtaining a routing node deployment scheme with minimum routing nodes and which can also ensure data transmission performance of the network.

Method and apparatus for determining position of routing node and terminal equipment

A wireless network deployment method, apparatus and system where the includes: initializing the wireless network to determine a deployment area and the number of access points needing to be deployed; initializing positions of the access points, and dividing the deployment area into grids; calculating a virtual force of each access point based on signal coverage of each grid; calculating a movement position of each point according to the virtual force; performing edge controlling on each point; and terminating processing when a terminating condition is satisfied. A deployment process is simulated as a dynamic physical process, movement of the access points along a direction of a resultant force of all repulsion forces and attractive forces is controlled following the principle that an overlapping covered area produces a repulsion force and an uncovered area produces an attractive force.

Growing community of inventors

Beijing, China

Hongchun Li