KR102216373B1 - Antenna and motion recognition apparatus - Google Patents

Abstract

According to one embodiment of the present invention, provided is an antenna capable of recognizing a location and motion of an object without using a plurality of antennas, comprising: a dielectric substrate; a ground conductor formed on a first surface of the dielectric substrate; a radiation element formed on a second surface of the dielectric substrate, and receiving a detection signal which radiates an electromagnetic wave by a fed RF signal or is reflected from a detection target; and an auxiliary element deforming a beam pattern of the radiation element so that the beam pattern of the antenna has an asymmetrical shape.

Description

Antenna and motion recognition device {ANTENNA AND MOTION RECOGNITION APPARATUS}

The present invention relates to antenna technology, and more particularly, to an antenna capable of motion recognition and a motion recognition apparatus.

Radar devices capable of detecting the distance and movement of objects in close proximity are used in various ways for industrial and military applications such as vehicle radar. For example, a radar sensor for a vehicle is required to prevent and avoid collisions that may occur during operation, and transmit electromagnetic waves using an antenna and receive electromagnetic waves reflected from objects to detect distance, direction, and speed information from a target.

The distance and speed of an object can be detected by a radar including one receiving antenna. At least two receiving antennas are required to accurately detect a two-dimensional position of an object using triangulation. In addition, at least three receiving antennas are required to accurately detect a three-dimensional position of an object using triangulation. In addition, in order to analyze the position and motion of an object using a plurality of antennas, a large amount of data processing and a large amount of memory are required.

On the other hand, in recent years, the spread of wearable devices such as smart watches, smart glasses, and smart bands is gradually expanding, and these wearable devices are expected to become the next-generation IT devices following smartphones and tablet PCs. In wearable devices, a function of recognizing the location of an object using an antenna or radar and detecting the movement of an object is required. Accordingly, there is an increasing demand for miniaturization of an antenna or radar for mounting on a wearable device.

The problem to be solved by the present invention is to provide an antenna capable of recognizing the position and motion of an object without using a plurality of antennas.

Another problem to be solved by the present invention is to provide a motion recognition apparatus capable of recognizing the position and motion of an object with a small number of parts and a small data throughput.

According to an embodiment of the present invention, a dielectric substrate; A ground conductor formed on the first surface of the dielectric substrate; A radiating element formed on the second surface of the dielectric substrate and emitting an electromagnetic wave by a fed RF signal or receiving a detection signal reflected from a detection object; And an auxiliary element that transforms the beam pattern of the radiating element so that the beam pattern of the antenna has an asymmetrical shape.

The detection signal pattern when the detection object moves from the first position to a different second position and the detection signal pattern when the detection object moves from the second position to the first position may be different.

The beam pattern formed by the antenna is divided into a plurality of regions, each of the plurality of regions has a different antenna detection energy, the first position is located in a first region of the plurality of regions, and the second position is a plurality of It may be located in a second area different from the first area among the areas of.

The second surface of the dielectric substrate is a plane formed by an x-axis and a y-axis that are orthogonal to each other, and when a straight line perpendicular to the second surface extending from the origin on the radiating element is referred to as the z-axis, the x-axis and On the xz plane formed by the z axis, the beam pattern of the antenna may be left and right asymmetric with respect to the z axis, and the beam pattern of the antenna on the yz plane formed by the y axis and the z axis may be left and right asymmetric with respect to the z axis. .

The radiating element may be a rectangular flat strip formed on the second surface, and the auxiliary element may be at least one flat strip formed on the second surface and spaced apart from the radiating element.

The auxiliary element may include a first auxiliary strip disposed to be spaced apart from a first side of the radiating element and a second auxiliary strip disposed to be separated from a second side connected to the first side of the radiating element. The first auxiliary strip and the second auxiliary strip may have at least one of a width (W), a height (H), and a thickness (T) different from each other.

The auxiliary element is spaced apart from a first side of the radiating element and a second side connected to the first side, and a third auxiliary strip formed to surround at least a portion of the first side of the radiating element and at least a portion of the second side It may include.

According to another embodiment of the present invention, there is provided an antenna having an asymmetrical beam pattern and receiving a detection signal reflected from a detection object; A storage unit storing a look-up table in which a detection energy pattern indicating a change in a detection signal according to a movement direction is pre-recorded, and storing a detection signal received by the antenna; A motion recognition apparatus may be provided including an analysis unit that performs motion recognition of the detection object based on the lookup table and a change in the received detection signal.

The analysis unit may perform motion recognition of the detection object by comparing a change in a detection signal received while the detection object is moving with a detection energy pattern stored in a lookup table.

In the lookup table, the detection energy pattern E1 of the antenna when an object moves from left to right, the detection energy pattern E2 of the antenna when an object moves from right to left, and when moving from top to bottom. The detection energy pattern E3 of the antenna of E3, the detection energy pattern E4 of the antenna when moving from the lower side to the upper side, and a combination thereof can be recorded.

The analysis unit compares the pattern of change of the detection signal according to the movement of the detection object with a plurality of detection energy patterns recorded in the lookup table, and moves the detection object from left to right, and moves from left to right. It is possible to determine whether it corresponds to one of a right and left movement, a vertical movement moving from an upper side to a lower side, a downward movement moving from a lower side to an upper side, and a combination thereof.

According to an embodiment of the present invention, by including an auxiliary element that transforms the beam pattern of the radiation element so that the beam pattern of the antenna has an asymmetric shape, it is possible to recognize the position and motion of an object without using a plurality of antennas. An antenna may be provided.

According to another embodiment of the present invention, by including an antenna having an asymmetrical beam pattern, a look-up table, and an analysis unit that performs motion recognition of a detection object based on a change in a received detection signal, a small number of parts and a small data throughput As a result, a motion recognition device capable of recognizing the position and motion of an object may be provided.

1 is a plan view and a perspective view of an antenna according to a first embodiment of the present invention.
2 is a graph showing a beam pattern of an antenna according to the first embodiment of the present invention.
3 is a graph showing a 3D beam pattern and a 2D beam pattern of a single patch antenna having one unit radiation cell.
4 is a graph showing a 3D beam pattern and a 2D beam pattern of an array antenna having a plurality of unit radiation cells.
5 is a conceptual diagram showing a radar triangulation method using two antennas in the prior art.
6 is a conceptual diagram showing a radar triangulation method using three antennas in the prior art.
7 is a graph showing detection energy of the antenna 1 according to an embodiment of the present invention when an object moves in the left and right directions and in the vertical direction.
8 is a graph showing detection energy of an antenna having a symmetrical beam pattern according to the prior art when an object moves in the left and right directions and in the vertical direction.
9A and 9B are plan views of an antenna according to various embodiments of the present disclosure.
10 is a block diagram of a motion recognition apparatus including an antenna according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The embodiments of the present invention are provided to more completely describe the present invention to those of ordinary skill in the art, and the following examples may be modified in various other forms, and the scope of the present invention is as follows. It is not limited to the examples. Rather, these embodiments are provided to make the present disclosure more faithful and complete, and to completely convey the spirit of the present invention to those skilled in the art.

Hereinafter, embodiments of the present invention will be described with reference to the drawings schematically showing ideal embodiments of the present invention. In the drawings, for example, the size and shape of the display regions may be exaggerated for convenience and clarity of description, and in actual implementation, deformations of the illustrated region may be expected. Accordingly, embodiments of the present invention should not be construed as being limited to a specific size and shape of a configuration or region shown herein.

1 is a plan view and a perspective view of an antenna according to a first embodiment of the present invention. 1A is a plan view of the antenna 1, and FIG. 1B is a perspective view of the antenna 1.

Referring to FIG. 1, the antenna 1 according to the first embodiment of the present invention includes a dielectric substrate 10, a ground conductor 20, a power supply line 30, a first radiating element 40, and an auxiliary element 50. ) Can be included.

The dielectric substrate 10 is an insulator, and may be formed of FR4 used as a PCB material or ceramic or Teflon, which is a material having a high dielectric constant. In one embodiment, the dielectric substrate 10 may be configured in the shape of a flat plate having a rectangular cross section.

The ground conductor 20 is formed on the lower surface (first surface) of the dielectric substrate 10 and may be formed of a metal conductor including copper, silver, and gold. The ground conductor 20 may be formed equal to the total area of the dielectric substrate 10.

The power supply line 30 is formed on the upper surface (second surface) of the dielectric substrate 10 and may be electrically coupled to the radiating element 40. When RF energy is supplied to the feed line 30, electromagnetic waves may be radiated to the outside of the antenna 1 through the radiating element 40.

The radiating element 40 is formed on the upper surface (second surface) of the dielectric substrate 10 and emits an electromagnetic wave by an RF signal fed through the power supply line 30 or receives a detection signal reflected from the detection object. I can.

The auxiliary element 50 may transform the beam pattern of the radiation element 40 so that the beam pattern (radiation pattern) of the antenna 1 becomes an asymmetric shape. A beam pattern having an asymmetric shape will be described later with reference to FIG. 2. The radiating element 40 is electrically connected to the feed line 30, but the auxiliary element 50 is not electrically connected to the feed line 30 or the radiating element 40. Although the auxiliary element 50 does not emit electromagnetic waves by itself, since it affects the electromagnetic wave radiation of the radiating element 40, the beam pattern of the radiating element 40 can be modified.

The radiating element 40 or the auxiliary element 50 may be formed as a metal pattern or a metal strip having a shape such as a square, a circle, or an ellipse on the dielectric substrate 10. The radiating element 40 or the auxiliary element 50 may be formed of a metal conductor including copper, silver, and gold.

As shown in FIG. 1, the radiating element 40 may be configured as one unit radiating cell. However, the present invention is not limited to this embodiment, and the configuration of the radiating element 40 as an array of a plurality of unit radiating cells may be included in the scope of the present invention.

In the embodiment shown in FIG. 1, the radiating element 40 is composed of one flat metal strip of a square shape, and the auxiliary element 50 is a first auxiliary strip 50a adjacent to the first side of the radiating element 40. ) And a second auxiliary strip 50b adjacent to the second side of the radiating element 40. The present invention is not limited to the embodiment shown in FIG. 1, and in other embodiments, the radiating element 40 is composed of a plurality of unit radiating cells, and the auxiliary element 50 is one auxiliary strip, two auxiliary It can consist of a strip, 3 auxiliary strips, and 4 or more auxiliary strips.

The first auxiliary strip 50a and the second auxiliary strip 50b may have at least one of a width W, a height H, and a thickness T so that the beam pattern of the antenna 1 is asymmetric. . When at least one of the width (W), height (H) and thickness (T: height stacked on the dielectric substrate) is different from each other, the symmetrical beam pattern radiated by the radiating element 40 is an asymmetric beam pattern Can be transformed into

The width W1 and the height H1 of the first auxiliary strip 50a may have different values from the width W2 and the height H2 of the second auxiliary strip 50b. In addition, the thickness T1 of the first auxiliary strip 50a may have a value different from the thickness T2 of the second auxiliary strip 50b.

Since the beam pattern of the antenna 1 has an asymmetric shape, the detection signal pattern when the detection object moves from the first position to the second position (different from the first position) where the electromagnetic wave radiated from the antenna 1 reaches And the pattern of the detection signal when moving from the second position to the first position is different.

That is, as will be described later, in a state where the detection object is separated from the antenna 1 by a predetermined distance, moving from the first position on the left corresponding to the movement in the x-axis direction to the second position on the right and the second position on the right It can be distinguished from moving to the first position on the left.

In addition, while the object to be detected moves from the first position on the upper side corresponding to the movement in the y-axis direction to the second position on the lower side, and the first position on the upper side from the second position on the lower side, It can be distinguished from moving to a location.

In addition, the beam pattern formed by the antenna 1 is divided into a plurality of regions, and each of the divided regions may have different antenna detection energies. In one embodiment, the beam pattern formed by the antenna 1 may be divided into nine areas. In another embodiment, the beam patterns formed by the antenna 1 may be divided into 9 or more 16, 25, and so on. The scope of the present invention is not limited to the number of areas partitioned in these embodiments.

A first position in which the detection object is disposed may be located in a first area of the plurality of areas, and a second location in which the object to be detected is moved and disposed may be located in a second area different from the first area of the plurality of areas. Since the beam pattern of the first region and the beam pattern of the second region are different and the detection object moves beyond the boundary of the region where the beam pattern is different, from the first position in the first region to the second position in the second region. In the case of movement, motion recognition is possible by analyzing changes in antenna detection energy patterns during movement.

2 is a graph showing a beam pattern of an antenna according to the first embodiment of the present invention. 2(a) is a graph showing a 3D beam pattern, and FIG. 2(b) is a graph showing a 2D beam pattern.

The beam pattern (radiation pattern) indicates an area where energy reaches from an antenna, and generally indicates an area in which the antenna detects an object. Referring to FIG. 2, it can be seen that the 3D stereoscopic beam pattern and the 2D beam pattern of the antenna 1 have an asymmetric shape.

The graph shown in red in FIG. 2B is a 2D beam pattern in the left and right direction of the antenna 1, and the graph shown in blue is a 2D beam pattern in the vertical direction of the antenna 1.

An arbitrary point on the antenna 1 is the origin, and the x-axis is a straight line in which the radiating element 40 and the second auxiliary strip 50b are lined up, and the radiating element 40 and the first auxiliary strip 50a are lined up. When a straight line is a y-axis and a straight line extending from the origin and perpendicular to the x-axis and y-axis is the z-axis, the left and right beam pattern is a cross section along the xz plane of the three-dimensional stereoscopic beam pattern. The vertical beam pattern is a cross section along the yz plane of the 3D stereoscopic beam pattern.

Referring to FIG. 2B, it can be seen that in the left and right direction beam patterns, the left and right of the beam pattern are asymmetric with respect to the z-axis, and in the vertical direction beam pattern, the left and right of the beam pattern are asymmetric with respect to the z-axis.

Hereinafter, a case in which the beam pattern of the antenna has a symmetrical shape will be described in comparison with the antenna 1 according to the embodiment of the present invention.

3 is a graph showing a 3D beam pattern and a 2D beam pattern of a single patch antenna having one unit radiation cell.

Referring to FIG. 3A, it can be seen that the three-dimensional stereoscopic beam pattern of the single patch antenna has a symmetrical shape. In addition, referring to FIG. 3B, it can be more clearly confirmed that the two-dimensional beam pattern of the single patch antenna has a symmetrical shape.

In FIG. 3B, the left and right beam pattern is a cross section along the xz plane of the 3D stereoscopic beam pattern, and the vertical beam pattern is a cross section along the yz plane of the 3D stereoscopic beam pattern. In (b) of FIG. 3, it can be seen that in the left and right direction beam patterns, the left and right sides of the beam pattern are symmetric with respect to the z-axis, and in the vertical direction beam pattern, the left and right sides of the beam pattern are symmetric with respect to the z-axis.

4 is a graph showing a 3D beam pattern and a 2D beam pattern of an array antenna having a plurality of unit radiation cells.

Referring to FIG. 4A, it can be seen that the 3D stereoscopic beam pattern of the array antenna has a symmetrical shape. Referring to FIG. 4B, it can be more clearly confirmed that the 2D beam pattern of the array antenna has a symmetrical shape.

In (b) of FIG. 4, the left and right beam pattern is a cross section along the xz plane of the 3D stereoscopic beam pattern, and the vertical beam pattern is a cross section along the yz plane of the 3D stereoscopic beam pattern. In FIG. 4B, it can be seen that the left and right beam patterns are symmetrical with respect to the z-axis, and the vertical beam patterns are symmetrical with respect to the z-axis.

Since the beam patterns of the single patch antenna and the array antenna shown in FIGS. 3 and 4 have a symmetrical shape, the direction of movement of the detection object can be known when the detection object is in a symmetrical position on the left or right side of the antenna or a symmetrical position on the top and bottom. none. However, in the antenna 1 according to the first embodiment of the present invention, since the beam pattern has an asymmetric shape, the detection object moves even when the detection object is in a symmetrical position on the left or right side of the antenna 1 or a symmetrical position on the top and bottom. You can figure out the direction.

5 is a conceptual diagram showing a radar triangulation method using two antennas in the prior art.

Referring to FIG. 5, in a radar composed of a first antenna and a second antenna, a distance between two antennas (D1), a distance from a first antenna to an object (D2), and a distance from a second antenna to an object (D3) Is measured. Using triangulation, you can determine the location of an object from the measured distances (D1, D2, D3).

If the triangulation method as shown in FIG. 5 is used, it is possible to distinguish between a case where an object moves from left to right with the same distance and speed and moves from right to left. However, it is impossible to distinguish when objects have the same distance and speed and move from top to bottom or from bottom to top. Therefore, in order to grasp the position in both the left and right directions and the up and down directions, three receiving antennas must be used as described later.

6 is a conceptual diagram showing a radar triangulation method using three antennas in the prior art.

Referring to FIG. 6, in a radar composed of a first antenna, a second antenna, and a third antenna, a distance D1 between a first antenna and a second antenna, a distance D2 from the first antenna to an object, and a second antenna The distance (D3) from to the object is measured. Using triangulation, you can determine the position of an object in the left and right directions from the measured distances (D1, D2, D3).

Also, the distance D4 between the second antenna and the third antenna, the distance D3 from the second antenna to the object, and the distance D5 from the third antenna to the object are measured. Using triangulation, you can determine the position of an object in the vertical direction from the measured distances (D4, D3, D5).

According to the prior art, three antennas are required to grasp the position of the object in the left and right direction and the direction in which the object moves in the vertical direction. However, according to the antenna 1 according to an embodiment of the present invention, a moving direction in a left-right direction and a moving direction in an up-down direction of an object can be recognized even with one antenna. That is, since the position and movement of the object in the left and right direction and the vertical direction can be distinguished by using the characteristic of the antenna 1 having an asymmetrical beam pattern, according to the present invention, the position of the object is also performed by one antenna 1 And motion can be accurately recognized.

7 is a graph showing detection energy of the antenna 1 according to an exemplary embodiment of the present invention when an object moves in the left-right direction and in the vertical direction.

The distance between the antenna 1 and the object is the distance D. When the first movement from the right to the left of the object, the second movement from the left to the right, the third movement from the bottom to the top, and the fourth movement from the top to the bottom, the energy detected by the antenna 1 Change patterns over time are shown in FIGS. 7B to 7E, respectively.

FIG. 7(b) is the antenna detection energy when an object moves from right to left (first movement), and FIG. 7(c) is an antenna when an object moves from left to right (second movement). Is the detection energy. Since the antenna 1 has an asymmetrical beam pattern, the patterns of the antenna detection energy of the first movement and the second movement are different. Therefore, it is possible to distinguish between the first movement and the second movement.

In addition, (d) of FIG. 7 is the antenna detection energy when the object moves from the lower side to the upper side (the third movement), and (e) of FIG. 7 is the case where the object moves from the upper side to the lower side (the fourth movement). Is the detection energy of the antenna. Since the antenna 1 has an asymmetrical beam pattern, the antenna detection energy patterns of the third movement and the fourth movement are different. Therefore, it is possible to distinguish between the third movement and the fourth movement.

8 is a graph showing the detection energy of an antenna having a symmetrical beam pattern according to the prior art when an object moves in the left and right directions and in the vertical direction.

The distance between the antenna and the object is the distance (D). When the first movement from the right to the left of the object, the second movement from the left to the right, the third movement from the bottom to the top, and the fourth movement from the top to the bottom occur, the energy detected by the antenna over time Change patterns are shown in Figs. 8B to 8E, respectively.

FIG. 8(b) is the antenna detection energy when an object moves from right to left (first movement), and FIG. 8(c) is an antenna when an object moves from left to right (second movement). Is the detection energy. The symmetric antenna has the same antenna detection energy pattern for the first movement and the second movement. Therefore, it is impossible to distinguish between the first movement and the second movement by the symmetric antenna.

In addition, (d) of FIG. 8 is the antenna detection energy when the object moves from the lower side to the upper side (third movement), and (e) of FIG. 8 is the case where the object moves from the upper side to the lower side (the fourth movement). Is the detection energy of the antenna. The symmetric antenna has the same antenna detection energy pattern for the third and fourth movements. Therefore, it is impossible to distinguish between the third movement and the fourth movement by the symmetric antenna.

9A and 9B are plan views of an antenna according to various embodiments of the present disclosure.

Referring to FIG. 9A, the antenna 2 may include a radiating element 41 and an auxiliary element 51. The auxiliary element 51 may be configured with one conductor pattern. The auxiliary element 51 may be formed to surround at least a portion of the upper and right sides of the radiating element 41 by being spaced apart from the upper and right sides of the radiating element.

The distance D1 between the auxiliary element 51 and the upper side of the radiating element 41 and the distance D2 between the auxiliary element 51 and the right side of the radiating element 41 may be different. In addition, the width W1 of the auxiliary element 51 adjacent to the upper side of the radiating element 41 and the width W2 of the auxiliary element 51 adjacent to the right side of the radiating element 41 may be different. With this configuration, the antenna 2 can have a beam pattern of an asymmetric shape.

Referring to FIG. 9B, the antenna 3 may include a radiating element 41 and three auxiliary elements 52, 53, and 53. The auxiliary elements 52, 53, 53 may be composed of three separate conductor patterns of different shapes. The first auxiliary element 52 has a rectangular shape, the second auxiliary element 53 has a triangular shape, and the third auxiliary element 54 has a circular shape. With this configuration, the antenna 3 can have a beam pattern of an asymmetric shape.

9A and 9B illustrate an antenna in which an auxiliary element is composed of one conductor pattern or three conductor patterns, but the present invention is not limited to this embodiment, and an antenna composed of three or more plurality of conductor patterns is also illustrated. It is included in the scope of the present invention.

9A and 9B illustrate that the auxiliary element is configured in a quadrangular, circular, triangular shape, but the present invention is not limited to this embodiment, and any geometrical shape capable of making the beam pattern of the antenna asymmetrical Both elements and antennas are included in the scope of the present invention.

10 is a block diagram of a motion recognition apparatus 100 including antennas 1, 2, and 3 according to an embodiment of the present invention.

The motion recognition apparatus 100 may include an antenna 110, a storage unit 120, and an analysis unit 130.

The antenna 110 radiates electromagnetic waves to the outside, receives a detection signal reflected from a detection object, and has an asymmetrical beam pattern. The antenna 110 may be configured by the antennas 1, 2, and 3 according to the embodiment of the present invention described above.

The storage unit 120 stores a lookup table 121 in which a change in a detection signal according to a moving direction is recorded in advance. Further, the storage unit 120 stores the detection signal received by the antenna 110.

The analysis unit 130 performs motion recognition of the detection object based on the change in the lookup table 121 and the received detection signal. The analysis unit 130 may perform motion recognition of the detection object by comparing a change in a detection signal received while the detection object is moving with a change in a detection signal stored in a lookup table.

The lookup table 121 includes a detection energy pattern E1 of an antenna when an object moves from left to right, a detection energy pattern E2 of an antenna when an object moves from right to left, and from top to bottom. The detection energy pattern E3 of the antenna when moving, the detection energy pattern E4 of the antenna when moving from the lower side to the upper side, and a combination thereof are recorded.

Since the beam pattern of the antenna 110 has an asymmetric shape, the detection energy pattern E1 of the antenna when moving from left to right and the detection energy pattern E2 of the antenna when moving from right to left are different. Further, the detection energy pattern E3 of the antenna when moving from the upper side to the lower side and the detection energy pattern E4 of the antenna when moving from the lower side to the upper side are different.

The analysis unit 130 compares the pattern of change of the detection signal according to the movement of the detection object with a plurality of detection energy patterns recorded in the lookup table 121, so that the detection object moves from left to right, and from left to right. It is possible to determine which one of a right-left movement moving to the right, an upright movement moving from an upper side to a lower side, a down movement moving from a lower side to an upper side, and a combination thereof.

The motion recognition apparatus 100 may perform motion recognition as follows. First, the antenna 110 of the motion recognition apparatus 100 receives a detection signal reflected from a detection object. The reflected detection signal received by the antenna 110 is stored in the storage unit 120. If there is no change in the detection signal for a predetermined period, the analysis unit 130 performs motion recognition of the detection object based on the change in the lookup table 121 and the received detection signal.

In the lookup table 121, a detection energy pattern indicating a change in a detection signal of an antenna when a certain object moves is recorded in advance. In one embodiment, the detection energy pattern E1 of the antenna when an object moves from left to right (E1), the detection energy pattern E2 of the antenna when an object moves from right to left, and moves from top to bottom. The detection energy pattern E3 of the antenna at the time, the detection energy pattern E4 of the antenna at the time of moving from the lower side to the upper side, and a combination thereof are stored in the lookup table 121.

The analysis unit 130 compares the change of the detection signal received while the detection object is moving with the detection energy pattern stored in the lookup table 121, and determines a detection energy pattern corresponding to the change pattern of the received detection signal.

For example, when the change pattern of the received detection signal corresponds to the detection energy pattern E1 of the antenna, the analysis unit 130 determines that the detection object has moved from left to right. Alternatively, when the change pattern of the received detection signal corresponds to the detection energy pattern E3 of the antenna, the analysis unit 130 determines that the detection object has moved from the top to the bottom. The motion recognition apparatus 100 may perform motion recognition of a detection object by determining a detection energy pattern corresponding to a change pattern of the received detection signal.

In a conventional motion recognition algorithm using three antennas, distances in the x-axis, y-axis, and z-axis directions are each calculated using three antennas, and location information over time is accumulated and stored, and the accumulated location information Is analyzed and the movement direction and motion recognition result are output.

Specifically, signals detected by each of the three antennas are each stored in a memory, and distance information between the three antennas and an object is calculated based on the detection signal, and the distance information between the three distances and the three antennas is The distances in the x, y, and z directions are calculated on the basis, and location information is derived. According to the movement of the object, such location information is accumulated and stored in the memory, and when the movement of the object ends, the movement direction of the object and a motion recognition result are output based on the accumulated location information.

However, according to the motion recognition apparatus 100 of the embodiment of the present invention, by using one antenna having an asymmetrical beam pattern for motion recognition, it is possible to reduce the use of memory and processor, and reduce the amount of calculation and calculation time. have.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and that various substitutions, modifications, and changes are possible within the scope of the technical spirit of the present invention. It will be obvious to those who have knowledge.

Claims (4)

A dielectric substrate;
A ground conductor formed on the first surface of the dielectric substrate; And
A radiating element formed on the second surface of the dielectric substrate and emitting an electromagnetic wave by a fed RF signal or receiving a detection signal reflected from a detection object; And
Including an auxiliary element for transforming the beam pattern of the radiation element so that the beam pattern of the antenna has an asymmetric shape,
The second surface of the dielectric substrate is a plane formed by an x-axis and a y-axis perpendicular to each other,
When a straight line perpendicular to the second plane extending from the origin on the radiating element is referred to as the z-axis, the beam pattern of the antenna on the xz plane formed by the x-axis and the z-axis is left and right asymmetric with respect to the z-axis, and y An antenna in which the beam pattern of the antenna is asymmetric with respect to the z axis on the yz plane formed by the axis and the z axis;
A storage unit storing a look-up table in which a detection energy pattern indicating a change in a detection signal according to a movement direction is recorded in advance, and a detection signal received by the antenna;
Motion recognition apparatus comprising an analysis unit for performing motion recognition of the detection object based on the change in the lookup table and the received detection signal. The method of claim 1,
The analysis unit performs motion recognition of the detection object by comparing a change in a detection signal received while the detection object is moving with a detection energy pattern stored in a lookup table. The method of claim 2,
In the lookup table, the detection energy pattern E1 of the antenna when an object moves from left to right, the detection energy pattern E2 of the antenna when an object moves from right to left, and when moving from top to bottom. A motion recognition apparatus in which the detection energy pattern E3 of the antenna of the above, the detection energy pattern E4 of the antenna when moving from the lower side to the upper side, and a combination thereof are recorded. The method of claim 3,
The analysis unit compares the pattern of change of the detection signal according to the movement of the detection object with a plurality of detection energy patterns recorded in the lookup table, and moves the detection object from left to right, and moves from left to right. A motion recognition device that determines whether it corresponds to one of a right and left movement, a vertical movement moving from an upper side to a lower side, a downward movement moving from a lower side to an upper side, and a combination thereof.

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