# US 12,601,832 B2 · Multi-radar based detection device and detection method for target object

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- Number: US 12,601,832 B2
- Document ID: US12601832B2
- Status: Granted
- Kind: B2
- Application number: 18/395,696
- Filed: 2023-12-25
- Published: 2025-05-08
- Granted: 2026-04-14
- Earliest claimed: 2023-11-06
- Assignees: Wistron Corporation
- Applicants: Wistron Corporation
- Inventors: Hsiao Yi Lin; Kaijen Cheng; Kai-Chung Cheng; Yao-Tsung Chang; Yin-Yu Chen
- Web page: https://patentgrep.com/patent/US12601832B2

## CPC

- G01S 13/87: Combinations of radar systems, e.g. primary radar and secondary radar
- G01S 7/415: {Identification of targets based on measurements of movement associated with the target}
- G01S 13/42: Simultaneous measurement of distance and other co-ordinates (indirect measurement G01S13/46)
- G01S 13/56: for presence detection {(presence detection using near field arrangements G01V3/00, e.g. G01V3/08, G01V3/12; burglar, theft or intruder alarms with electrical actuation G08B13/22 - G08B13/26)}
- G01S 13/886: {for alarm systems (alarms with electrical actuation G08B13/22)}
- G01S 13/0209: {Systems with very large relative bandwidth, i.e. larger than 10 %, e.g. baseband, pulse, carrier-free, ultrawideband}
- G01S 13/582: {adapted for simultaneous range and velocity measurements}
- G01S 13/584: {adapted for simultaneous range and velocity measurements}
- G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES

## Abstract

A multi-radar based detection device and detection method for a target object are provided. In the detection method, a first detection result corresponding to a first detection space and a second detection result corresponding to a second detection space are received. The first detection space entering a first status is determined in response to the first detection result indicating that the target object in the first detection space moves to an overlapping area between the first detection space and the second detection space. First information is output in response to determining that the first detection space enters the first status. The second detection space entering a second status is determined in response to the second detection result indicating that the target object not in the second detection space appears in the overlapping area. Second information is output in response to determining that the second detection space enters the second status.

## Claims

### Claim 1

A multi-radar based detection device for a target object, comprising:
a human-machine interface;
a transceiver configured to receive a first detection result corresponding to a first detection space and a second detection result corresponding to a second detection space from a plurality of radars, wherein the plurality of radars monitor the first detection space and the second detection space and generate the first detection result and the second detection result, respectively; and
a processor communicatively coupled to the human-machine interface and the transceiver to receive the first detection result and the second detection result and configured to perform:
detecting the target object according to the first detection result and the second detection result;
determining that the first detection space enters a first status in response to determining that the target object in the first detection space moves to an overlapping area between the first detection space and the second detection space based on the first detection result;
outputting first information via the human-machine interface in response to determining that the first detection space enters the first status, wherein the first information indicates that the target object is located in the first detection space;
determining that the second detection space enters a second status in response to determining that the target object, which was not detected in the second detection space, appears in the overlapping area based on the second detection result;
outputting second information via the human-machine interface in response to determining that the second detection space enters the second status, wherein the second information indicates that the target object is not in the second detection space;
obtaining a plurality of point clouds respectively corresponding to a plurality of time points from the first detection result;
performing an object detection on the plurality of point clouds to generate a plurality of bounding boxes respectively corresponding to the plurality of point clouds;
determining an inclination angle change of the target object during a default period according to the plurality of bounding boxes; and
determining that the target object fell in response to the inclination angle change being greater than an inclination angle threshold value.

### Claim 2 (depends on 1)

The detection device of claim 1, wherein the processor is further configured to perform:
determining that the first detection space enters a third status from the first status in response to the first detection result indicating that the target object disappears from the first detection space; and
outputting third information via the human-machine interface in response to determining that the first detection space enters the third status, wherein the third information indicates that the target object is not in the first detection space.

### Claim 3 (depends on 2)

The detection device of claim 2, wherein the processor is further configured to perform:
determining that the second detection space enters a fourth status from the second status in response to the second detection result indicating that the target object moves to the second detection space from the overlapping area; and
outputting fourth information via the human-machine interface in response to determining that the second detection space enters the fourth status, wherein the fourth information indicates that the target object is located in the second detection space.

### Claim 4 (depends on 1)

The detection device of claim 1, wherein the processor is further configured to perform:
determining that the first detection space enters a fourth status from the first status in response to the first detection result indicating that the target object moves to the first detection space from the overlapping area; and
outputting the first information via the human-machine interface in response to determining that the first detection space enters the fourth status.

### Claim 5 (depends on 4)

The detection device of claim 4, wherein the processor is further configured to perform:
determining that the second detection space enters a third status from the second status in response to the second detection result indicating that the target object disappears from the second detection space; and
outputting the second information via the human-machine interface in response to determining that the second detection space enters the third status.

### Claim 6 (depends on 1)

The detection device of claim 1, wherein the processor is further configured to perform:
determining that the first detection space enters a fifth status in response to the first detection result indicating that the target object located in the first detection space disappears from the first detection space; and
outputting the first information via the human-machine interface in response to determining that the first detection space enters the fifth status.

### Claim 7 (depends on 6)

The detection device of claim 6, wherein the processor is further configured to perform:
determining that the first detection space enters a fourth status from the fifth status in response to the first detection result indicating that the target object appears in the first detection space; and
outputting the first information via the human-machine interface in response to determining that the first detection space enters the fourth status.

### Claim 8 (depends on 6)

The detection device of claim 6, wherein the processor is further configured to perform:
determining that the first detection space enters a third status from the fifth status in response to the first detection result indicating that the target object does not appear in the first detection space; and
outputting third information via the human-machine interface in response to determining that the first detection space enters the third status, wherein the third information indicates that the target object is not in the first detection space.

### Claim 9 (depends on 1)

The detection device of claim 1, wherein the processor is further configured to perform:
determining that the first detection space enters a third status in response to the first detection result indicating that the target object located in the first detection space disappears from a default area in the first detection space; and
outputting third information via the human-machine interface in response to determining that the first detection space enters the third status, wherein the third information indicates that the target object is not in the first detection space.

### Claim 10 (depends on 1)

The detection device of claim 1, wherein the processor is further configured to perform:
determining that the second detection space enters a sixth status in response to the second detection result indicating that the target object not in the second detection space appears in the second detection space; and
outputting the second information via the human-machine interface in response to determining that the second detection space enters the sixth status.

### Claim 11 (depends on 10)

The detection device of claim 10, wherein the processor is further configured to perform:
determining that the second detection space enters a third status in response to the second detection result indicating that the target object disappears from the second detection space when the second detection space is in the sixth status; and
outputting the second information via the human-machine interface in response to determining that the second detection space enters the third status.

### Claim 12 (depends on 10)

The detection device of claim 10, wherein the processor is further configured to perform:
determining that the second detection space enters a fourth status from the sixth status in response to the second detection result indicating that the target object does not disappear from the second detection space; and
outputting fourth information via the human-machine interface in response to determining that the second detection space is located in the fourth status, wherein the fourth information indicates that the target object is located in the second detection space.

### Claim 13 (depends on 1)

The detection device of claim 1, wherein the processor is further configured to perform:
determining that the second detection space enters a fourth status in response to the target object not in the second detection space appearing in a default area in the second detection space; and
outputting fourth information via the human-machine interface in response to determining that the second detection space enters the fourth status, wherein the fourth information indicates that the target object is located in the second detection space.

### Claim 14 (depends on 1)

The detection device of claim 1, wherein the processor is further configured to perform:
determining a physiological status of the target object included in the first detection result and the second detection result; and
outputting, in addition to the first information and the second information, a graphical user interface via the human-machine interface, wherein the graphical user interface displays a first icon for indicating the physiological status of the target object, wherein the physiological status comprises at least one of a heartbeat and a breathing rate.

### Claim 15 (depends on 14)

The detection device of claim 14, wherein the graphical user interface is further configured to display a second icon for indicating an occupancy status of an area in the first detection space, wherein the second icon is associated with at least one of the following: a bed, a bedroom, a living room, a kitchen, and a bathroom, and the graphical user interface is further configured to display whether a radar is disconnected.

### Claim 16 (depends on 1)

The detection device of claim 1, wherein the processor is further configured to perform:
calculating a stay time of the target object in the first detection space in response to the first detection result indicating that the target object is located in the first detection space;
outputting a first warning message via the human-machine interface in response to the stay time being greater than a first threshold value; and
outputting a second warning message via the human-machine interface in response to the stay time being less than a second threshold value.

### Claim 17 (depends on 1)

The detection device of claim 1, wherein the processor is further configured to perform:
determining whether the target object fell in the first detection space according to the first detection result; and
outputting a warning message via the human-machine interface in response to determining that the target object fell.

### Claim 18 (depends on 1)

The detection device of claim 1, wherein the processor is further configured to perform:
calculating an away time of the target object in response to the first detection result indicating that the target object is to leave the first detection space; and
outputting a warning message via the human-machine interface in response to the away time being greater than a third threshold value.

### Claim 19 (depends on 1)

The detection device of claim 1, wherein the processor is further configured to perform:
determining a speed of the target object or a height of the target object during the default period according to the plurality of bounding boxes; and
determining that the target object fell in response to the height being less than a fifth threshold value or the speed being greater than a sixth threshold value.

### Claim 20

A multi-radar based detection method for a target object, comprising:
receiving a first detection result corresponding to a first detection space and a second detection result corresponding to a second detection space from a plurality of radars from a plurality of radars, wherein the plurality of radars monitor the first detection space and the second detection space and generate the first detection result and the second detection result, respectively;
detecting the target object according to the first detection result and the second detection result;
determining that the first detection space enters a first status in response to determining that the target object in the first detection space moves to an overlapping area between the first detection space and the second detection space based on the first detection result;
outputting first information via a human-machine interface in response to determining that the first detection space enters the first status, wherein the first information indicates that the target object is located in the first detection space;
determining that the second detection space enters a second status in response to determining that the target object, which was not detected in the second detection space, appears in the overlapping area based on the second detection result;
outputting second information via the human-machine interface in response to determining that the second detection space enters the second status, wherein the second information indicates that the target object is not in the second detection space;
obtaining a plurality of point clouds respectively corresponding to a plurality of time points from the first detection result;
performing an object detection on the plurality of point clouds to generate a plurality of bounding boxes respectively corresponding to the plurality of point clouds;
determining an inclination angle change of the target object during a default period according to the plurality of bounding boxes; and
determining that the target object fell in response to the inclination angle change being greater than an inclination angle threshold value.