阅读说明：本技术 基于无线信号的动作检测方法、检测装置和电子设备 (Action detection method and device based on wireless signals and electronic equipment ) 是由 丁根明 田军 赵倩 李红春 李磊 于 2018-06-15 设计创作，主要内容包括：本申请实施例提供一种基于无线信号的动作检测方法、检测装置和电子设备,该控制装置包括：第一处理单元,其用于对无线信号源发射的无线信号的反射信号进行处理,得到在各预定的时间周期内对所述无线信号进行反射的各反射点的运动速率和各反射点在二维平面的位置信息；第二处理单元,其根据各反射点的所述位置信息对该预定的时间周期内的所述反射点进行聚类形成两个簇；第一计算单元,其用于计算所述主簇中反射点的平均速率,以及所述主簇的簇中心和所述从簇的簇中心的间距；以及动作确定单元,其根据所述平均速率和所述间距,确定所述被检测体的动作类型。根据本申请,能够以简单而有效的方式准确地识别被检测体的动作类型。(The embodiment of the application provides a wireless signal-based action detection method, a detection device and electronic equipment, wherein the control device comprises: the first processing unit is used for processing a reflected signal of a wireless signal transmitted by a wireless signal source to obtain the motion rate of each reflecting point for reflecting the wireless signal in each preset time period and the position information of each reflecting point on a two-dimensional plane; a second processing unit which clusters the reflection points in the predetermined time period according to the position information of each reflection point to form two clusters; a first calculation unit for calculating an average rate of reflection points in the master cluster and a cluster center of the slave cluster; and an action determining unit that determines an action type of the object based on the average rate and the pitch. According to the present application, the operation type of the object can be accurately identified in a simple and efficient manner.)

1. An action detection device based on a wireless signal, the device comprising:

the first processing unit is used for processing a reflected signal of a wireless signal transmitted by a wireless signal source to obtain the movement rate of each reflecting point for reflecting the wireless signal in each preset time period and the position information of each reflecting point on a two-dimensional plane;

a second processing unit, which clusters the reflection points in the predetermined time period according to the position information of each reflection point to form two clusters, wherein the two clusters include a master cluster and a slave cluster, and the distance between the cluster center of the master cluster and a receiving device of the reflection signal is shorter than the distance between the cluster center of the slave cluster and the receiving device;

a first calculation unit for calculating an average rate of reflection points in the master cluster and a cluster center of the slave cluster; and

and an action determining unit which determines the action type of the detected object according to the average speed and the interval.

2. The apparatus of claim 1, wherein the apparatus further comprises:

a second calculation unit that calculates a distribution range of the arrival angle from the arrival angle of the reflected signal reflected by each reflection point within the predetermined time period; and

a third calculation unit that corrects the average velocity and/or the pitch according to a distribution range of the angle of arrival,

wherein the motion determination unit determines the motion of the detected object based on the corrected average velocity and/or the corrected pitch.

3. The apparatus of claim 2, wherein the apparatus further comprises:

a filtering unit for filtering the average velocity, the distribution range of the angles of arrival and the spacing,

wherein the third calculation unit corrects the filtered average velocity and/or the filtered interval using the filtered distribution range of the angle of arrival.

4. The apparatus of claim 1, wherein the action determining unit comprises:

and the first determining unit is used for determining the action type of each sub-window according to the average speed and the interval corresponding to each sub-window in the sliding time window.

5. The apparatus of claim 4, wherein the action determining unit further comprises:

and a second determining unit configured to determine the current action type of the sub-window according to the action types of sub-windows subsequent to the current sub-window when the current action types of the sub-window are determined to be two or more.

6. The apparatus of claim 1, wherein the apparatus further comprises a hazardous state determination unit comprising:

a third specifying unit that specifies an operation state of the object in each of the sliding time windows based on an operation type of a predetermined sub-window in the sliding time window;

a fourth determination unit that determines a state transition coefficient for indicating an increased degree of the possibility of the dangerous state, based on the action state of the sliding time window immediately preceding the current sliding time window and the action state of the current sliding time window; and

and the fifth determining unit is used for determining the danger coefficient of the current sliding time window according to the state transition coefficient and the danger coefficient of the previous sliding time window.

7. The apparatus of claim 6, wherein,

when the action type of a predetermined sub-window of the detected body in the sliding time window is a predetermined type, a third determining unit determines the action state of the detected body in the sliding time window according to whether the average value of the position information of the cluster center of the main cluster in the sliding time window is in a preset area.

8. An electronic device having the motion detection apparatus as claimed in any one of claims 1-7.

9. A wireless signal-based motion detection method for detecting a motion of a subject, the method comprising:

processing a reflected signal of a wireless signal transmitted by a wireless signal source to obtain the movement rate of each reflecting point for reflecting the wireless signal in each preset time period and the position information of each reflecting point on a two-dimensional plane;

clustering the reflection points in the preset time period according to the position information of each reflection point to form two clusters, wherein the two clusters comprise a main cluster and a slave cluster, and the distance between the cluster center of the main cluster and a receiving device of the reflection signal is shorter than the distance between the cluster center of the slave cluster and the receiving device;

calculating the average velocity of the reflection points in the master cluster and the distance between the cluster center of the master cluster and the cluster center of the slave cluster; and

and determining the action type of the detected body according to the average speed and the interval.

10. The method of claim 9, wherein the method further comprises:

calculating the distribution range of the arrival angle according to the arrival angle of the reflected signal reflected by each reflection point in the preset time period; and

correcting the average velocity and/or the spacing according to the distribution range of the arrival angles,

wherein the content of the first and second substances,

in the step of determining the motion type of the object, the motion of the object is determined based on the corrected average rate and/or the corrected pitch.

Technical Field

The present application relates to the field of information technology, and in particular, to a method and an apparatus for detecting a motion based on a wireless signal, and an electronic device.

Background

The current society aging trend aggravates, and solitary old man's quantity sharply increases, can in time report an emergency and ask for help when dangerous when taking place for the old man provides dangerous action detection service, therefore has important meaning.

Disclosure of Invention

The inventor of the present application finds that the current wireless signal-based motion detection method has some defects, such as: doppler (Doppler) information of various actions of a human body has great similarity, so that specific action types are difficult to distinguish according to the Doppler information, particularly complex action types, and the action identification precision is not high enough; in addition, the method needs to perform supervised learning based on a large number of sampling samples in the training stage, is not strong in universality in different scenes, and is not suitable for being applied to various complex scenes in a large scale.

Embodiments of the present application provide a method, a device, and an electronic apparatus for detecting an action based on a wireless signal, in which a reflected signal reflected by a wireless signal by an object is clustered into reflection points to form clusters of the reflection points, characteristics of the clusters are extracted, and an action type of the object is detected based on the characteristics of the clusters. Thus, the operation type of the object can be accurately recognized in a simple and efficient manner.

According to a first aspect of the embodiments of the present application, there is provided a wireless signal-based motion detection apparatus for detecting a motion of a subject, the apparatus including: the first processing unit is used for processing a reflected signal of a wireless signal transmitted by a wireless signal source to obtain the motion rate of each reflecting point for reflecting the wireless signal in each preset time period and the position information of each reflecting point on a two-dimensional plane; a second processing unit, which clusters the reflection points in the predetermined time period according to the position information of each reflection point to form two clusters, wherein the two clusters include a master cluster and a slave cluster, and the distance between the cluster center of the master cluster and a receiving device of the reflection signal is shorter than the distance between the cluster center of the slave cluster and the receiving device; a first calculation unit for calculating an average rate of reflection points in the master cluster and a cluster center of the slave cluster; and an action determining unit that determines an action type of the object based on the average rate and the pitch.

According to a second aspect of the present embodiment, there is provided a wireless signal-based motion detection method for detecting a motion of a subject, the method including: processing a reflected signal of a wireless signal transmitted by a wireless signal source to obtain the motion rate of each reflecting point for reflecting the wireless signal in each preset time period and the position information of each reflecting point on a two-dimensional plane; clustering the reflection points in the preset time period according to the position information of each reflection point to form two clusters, wherein the two clusters comprise a main cluster and a slave cluster, and the distance between the cluster center of the main cluster and a receiving device of the reflection signal is shorter than the distance between the cluster center of the slave cluster and the receiving device; calculating the average velocity of the reflection points in the master cluster and the distance between the cluster center of the master cluster and the cluster center of the slave cluster; and determining the action type of the detected body according to the average speed and the distance.

According to a third aspect of the present embodiments, there is provided an electronic device comprising the motion detection apparatus of the first aspect of the embodiments.

The beneficial effect of this application lies in: the action type of the detected object can be accurately identified in a simple and effective manner.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the invention are not so limited in scope. The embodiments of the invention include many variations, modifications and equivalents within the spirit and scope of the appended claims.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

fig. 1 is a schematic view of a wireless signal transceiving apparatus according to embodiment 1 of the present application;

fig. 2 is a schematic view of the motion detection device according to embodiment 1 of the present application;

FIG. 3 is a schematic diagram of reflection points in a two-dimensional plane within a predetermined time period in example 1 of the present application;

fig. 4 is a schematic diagram of a motion determination unit according to embodiment 1 of the present application;

FIG. 5 is a schematic diagram of the sliding time window and sub-window of example 1 of the present application;

fig. 6 is a schematic view of a hazardous condition determining unit of embodiment 1 of the present application;

fig. 7 is a schematic diagram of a manner in which a fourth determination unit of embodiment 1 of the present application determines a state transition coefficient;

fig. 8 is a schematic diagram of a wireless signal-based motion detection method according to embodiment 2 of the present application;

fig. 9 is a schematic view of a method of determining the operation type of a subject according to embodiment 2 of the present application;

FIG. 10 is a schematic diagram of a method of determining a risk factor of a sliding window according to example 2 of the present application;

fig. 11 is a schematic diagram of a configuration of an electronic device according to embodiment 3 of the present application.

Detailed Description

The foregoing and other features of the invention will become apparent from the following description taken in conjunction with the accompanying drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the embodiments in which the principles of the invention may be employed, it being understood that the invention is not limited to the embodiments described, but, on the contrary, is intended to cover all modifications, variations, and equivalents falling within the scope of the appended claims.