WIRELESS SENSOR NETWORK ARCHITECTURE BASED ON MULTIFUCTIONAL AND COMPOUND SENSORS

• US 20180132309A1
• Filed: 10/30/2014
• Published: 05/10/2018
• Est. Priority Date: 09/16/2014
• Status: Active Grant

• Current Assignee: Beijing Information Technology Institute, Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences
• Original Assignee: Beijing Information Technology Institute, Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences
• Inventors: CHEN, YUHONG, YUAN, XIAOBING, WANG, SHICHENG, LIANG, TINGTING, LIU, HUAWEI
• Granted Patent: US 10,368,392 B2
• Time in Patent Office: Days
• CPC Class Codes: G01V 1/001 Acoustic presence detection
• CPC Class Codes: G01V 1/223 Radioseismic systems
• CPC Class Codes: G06F 18/25 Fusion techniques
• CPC Class Codes: G06F 3/16 Sound input; Sound output speech processing G10L
• CPC Class Codes: G06V 20/52 Surveillance or monitoring of activities, e.g. for recognising suspicious objects recognising microscopic objects G06V20/69
• CPC Class Codes: H04N 23/00 Cameras or camera modules comprising electronic image sensors; Control thereof
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks
• CPC Class Codes: H04W 84/20 Master-slave selection or change arrangements

Abstract

A wireless sensor network architecture based on multifunctional and compound sensors comprises several sensing modules including a plurality of first sensor nodes and a second sensor node. The first sensor nodes are used for collecting a target signal after sensing that a moving target enters a detection area, extracting feature information of the moving target, analyzing the feature information of the moving target to form primary target information, and transmitting the primary target information to the second sensor node, The second sensor node performs moving target matching and association on the primary target information of the moving target that is transmitted by the plurality of first sensor nodes, collects the associated primary target information to form secondary target information. A control module used for synthesizing and calibrating the secondary target information, and obtaining by merging the calibrated secondary target information, the situation evaluation of the moving target to form advanced target information.

Claims

1. A wireless sensor network architecture based on multifunctional and compound sensors for monitoring a moving target, characterized by comprising:

several sensing modules, each of the sensing modules comprising a plurality of first sensor nodes and a second sensor node, the plurality of first sensor modes and the second sensor node forming a detection area;

wherein the first sensor nodes are used for collecting a target signal of a moving target after sensing that the moving target enters the detection area, pre-processing the target signal, extracting feature information of the moving target, analyzing the feature information of the moving target to form primary target information, and transmitting the primary target information to the second sensor node, and the second sensor node is used for performing moving target matching and association on the primary target information of the moving target that is transmitted by the plurality of first sensor nodes, and correcting the associated primary target information to form secondary target information;

a relay transmission module connected with the sensing modules, used for communicating with the second sensor node for receiving the secondary target information; and

a control module connected with the relay transmission module, used for receiving the secondary target information transmitted by the second sensor node, synthesizing and calibrating the secondary target information, simultaneously acquiring situation evaluation of the moving target by merging the calibrated secondary target information, and forming advanced target information according to the situation evaluation of the moving target.

2. The wireless sensor network architecture based on multifunctional and compound sensors of claim 1, characterized in that, the first sensor nodes comprise a shock sensor, a sound sensor, an image sensor, a first information merging unit, a first communication unit and a positioning unit;

wherein the shock sensor comprises a shock sensing unit and a shock signal processing unit;

a plurality of sound sensors form a multi-element sound array according to a predetermined rule, and the multi-element sound array comprises a multi-element sound sensing unit and a multi-element sound signal processing unit; and

the image sensor comprises an image sensing unit and an image information processing unit;

the shock sensing unit, the multi-element sound sensing unit and the image sensing unit are used for sensing and collecting a shock signal, a sound signal and image information of the moving target, respectively;

the positioning unit is used for acquiring absolute orientation information of a preset reference object within the first sensor nodes;

the shock signal processing unit and the multi-element sound signal processing unit are respectively used for, according to the collected shock signal and sound signal, extracting acoustic shock feature information of the moving target, identifying a target category of the moving target, acquiring, according to the multi-element sound array, a relative direction angle of a running direction of the moving target to the preset reference object, and combining the relative direction angle of the running direction of the moving target to the preset reference object and the absolute orientation information of the preset reference object provided by the positioning unit to estimate an actual movement direction of the moving target; and

when acquiring the relative direction angle of the running direction of the moving target to the preset reference object, initiating the image sensing unit of the image sensor to acquire a plurality of consecutive frames of images of the moving target, and initiating the image information processing unit of the image sensor to extract multi-dimensional image information of the moving target and to acquire image feature information of the moving target;

the first information merging unit is used for merging the acoustic shock feature information, the image feature information, the target category and the actual running direction of the moving target, estimating a running state of the moving target and forming the primary target information; and

the first communication unit is used for transmitting the primary target information to the second sensing node.

3. The wireless sensor network architecture based on multifunctional and compound sensors of claim 2, characterized in that, the first sensor nodes further comprise an environmental information acquiring unit used for sensing environmental and climatic conditions of the moving target and acquiring tilt angle information of the first sensor nodes to determine operating states of the shock sensor and the image sensor, and an energy sensing unit for sensing energy losses of the first sensor nodes;

wherein, image quality is judged according to the environmental and climatic conditions acquired by the environmental information acquiring unit.

4. The wireless sensor network architecture based on multifunctional and compound sensors of claim 2, characterized in that, the second sensor nodes comprise a second communication unit, a second information processing unit and a second information merging unit;

wherein the second communication unit is used for receiving the primary target information transmitted by the plurality of first sensor nodes;

the second information processing unit is used for converging the primary target information, and performing target matching and association on the converged primary target information, and then correcting a vector state and a covariance for the associated information;

the second information merging unit is used for performing space-time merging on the corrected primary target information to form the secondary target information, and enabling the second communication unit to transmit the secondary target information to the control module;

wherein the first communication unit and the second communication unit have a function of automatically adjusting its own transmit power.

5. The wireless sensor network architecture based on multifunctional and compound sensors of claim 4, characterized in that, the second sensor nodes further comprise a second sensing unit used for sensing an energy loss of the second sensor node;

and if the sensed energy loss of the second sensor node reaches a depletion threshold, the second sensing unit transmits an instruction for reselecting a second sensor node and enables the first sensor nodes to select a new second sensor node according to a predetermined selection rule.

6. The wireless sensor network architecture based on multifunctional and compound sensors of claim 1, characterized in that, the control module comprises a third communication unit, a third information merging unit, a third information processing unit, a command and control unit, and a storage unit;

wherein, the third communication unit is used for receiving the secondary target information transmitted by the plurality of sensing modules via the relay transmission module;

the third information merging unit is used for performing data merging on the received secondary target information;

the third information processing unit is used for performing situation analysis and situation prediction on the obtained secondary target information through merging, so as to acquire the advanced target information;

the command and control unit is used for sending a command to an operator according to the advanced target information; and

the storage unit is used for storing the advanced target information.

7. The wireless sensor network architecture based on multifunctional and compound sensors of claim 1, characterized in that, the relay transmission module is further used for automatically adjusting its own transmit power.

8. The wireless sensor network architecture based on a multifunctional and compound sensors of claim 7, characterized in that, the wireless sensor network architecture based on multifunctional and compound sensors further comprises an energy conservation management module connected with the plurality of sensing modules and the relay transmission module, wherein the energy conservation management module is used for managing operating modes of the plurality of sensing modules and the relay transmission module to optimize and configure operating states of the first sensor nodes and the second sensor node, and managing a transmit mode of the relay transmission module.

9. The wireless sensor network architecture based on multifunctional and compound sensors of claim 1, characterized in that, a mesh network structure is adopted between the plurality of first sensor nodes and the second sensor nodes.