KR101928417B1 - System for determining orientation of moving object using plurality of UWB Radar(Pulse Radar) Sensor and method therefor - Google Patents

Abstract

The present invention relates to a direction determination system for a moving object using a UWB radar sensor for determining the direction of a moving object by using a plurality of UWB Radar (Pulse Radar), and a counting method using the UWB radar sensor.
According to the above description, there is an effect that a moving object in a specific area can be counted by detecting an object moving in opposite directions simultaneously in a specific area by transmitting and receiving pulse signals of a plurality of UWB radars.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a UWB radar sensor and a method for determining a direction of a moving object using the UWB radar sensor,

The present invention relates to a direction determination system for a moving object using a plurality of UWB Radar (Pulse Radar) sensors and a counting method using the same. More particularly, the present invention relates to a UWB radar And a counting method using the UWB radar sensor.

The present invention relates to a network camera and an object recognition method, and more particularly, to a network camera and an object recognition method equipped with a motion detection sensor, in which a sensor unit including at least one motion detection sensor detects motion in a predetermined viewing angle range, And a signal received from the sensor unit is processed to determine whether an object exists based on the processed signal.

There is a method of recognizing an object using this camera and observing the direction of movement of the object. There is a method of recognizing an object by using a direction recognition count sensor and observing a moving direction of the object. And to observe the direction of movement.

In order to recognize a human face or a specific object, a camera using a camera requires a high-resolution camera of a digital camera grade, which is more expensive than a UWB radar technology. The image processing technique using a camera is basically compared with a UWB radar A large amount of computation is required. In addition, the technique of observing the moving direction of an object using a camera has a limitation in operation in a disaster / disaster environment in which a visibility is not secured due to a dark environment without light or smoke, and may cause personal privacy problems.

The technique of observing the moving direction of an object using a direction recognition count sensor has a limitation in coping with a case where two or more people pass through an area observed at the same time or pass through an area observed simultaneously in the opposite direction. In addition, there is a disadvantage that the infrared sensor must be installed in a relatively small space.

The technique of observing the moving direction of an object using a single radar has a limitation in coping with the case where several persons pass through the observation area side by side.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a UWB radar capable of sensing and counting objects traveling in opposite directions in a specific area by performing signal processing by transmitting and receiving pulse signals of a plurality of UWB radars, A direction determination system for a moving object using a sensor, and a counting method using the same.

According to an aspect of the present invention, there is provided a wireless communication system including at least one UWB radar unit transmitting and receiving a pulse signal in a specific area; A direction determiner for determining a moving direction of the object by using a position and a time difference entering the specific region of the UWB radar unit; And a counting unit counting a moving object when a plurality of objects simultaneously move to a specific area of the UWB radar unit.

Preferably, the direction determination unit simultaneously detects an object moving in a first direction and an object moving in a direction opposite to the first direction in a specific area.

Preferably, the direction determining unit includes: a time storage module that stores time when the target enters each radar (Radar1 or Radar2) when a plurality of objects pass through the observation area of the radar; And determining a first direction when the entering time to the first radar is longer than a time when the entering time is longer than a time when the entering time enters the second radar using the time difference of entering the specific radar, And a direction determination module for determining a direction to be performed.

Preferably, the counting unit also includes a counter module that increases a counter corresponding to each direction every time a plurality of objects pass through the observation region of the radar; And a comparison determination module that compares the radar signal intensity and the set threshold value to calculate the number of people to be moved.

The method includes the steps of: (a) receiving data from at least one UWB radar unit in a specific region by a control unit of the direction determination system; (b) determining the moving direction of the object using the position and time difference at which the controller enters a specific region of the UWB radar; And (c) causing the control unit to count a moving object when a plurality of objects simultaneously move to a specific area of the UWB radar unit.

Preferably, the step (b) further includes the steps of: (b-1) storing time when the target enters each radar (Radar1 or Radar2) when a plurality of objects pass through the observation area of the radar; And (b-2) when the controller enters the first radar into the first radar using the time difference of entering the specific radar, the controller determines the first direction if the entry time is earlier than the time when the entry time enters the second radar, And determining the direction opposite to the first direction.

Preferably, the step (c) includes the steps of: (c-1) increasing the counter corresponding to each direction every time the plurality of objects pass through the observation region of the radar; And (c-2) comparing the radar signal strength with the threshold value set by the controller to calculate the number of people to be moved.

Preferably, the step (b) is a step of simultaneously sensing an object moving in a first direction and an object moving in a direction opposite to the first direction in a specific area.

According to the above description, it is possible to detect an object moving in opposite directions and simultaneously in a specific area by transmitting and receiving pulse signals of a plurality of UWB radars, and counting an object to be moved in a specific area.

FIG. 1 is an overall configuration diagram of a direction determination system for a moving object using a UWB radar sensor according to an embodiment of the present invention.
2 is a conceptual diagram for determining and counting directions of a plurality of objects in a direction determination system for a moving object using a UWB radar sensor according to an embodiment of the present invention.
3 is a diagram illustrating an overall flow of a counting method using a direction determination system for a moving object using a UWB radar sensor according to an embodiment of the present invention.
4 is a flowchart illustrating a moving direction determination method of a counting method using a direction determination system of a moving object using a UWB radar sensor according to an embodiment of the present invention.
5 is a flowchart illustrating a counting method of a counting method using a direction determination system for a moving object using a UWB radar sensor according to an embodiment of the present invention.
FIG. 6 is a diagram illustrating an algorithm and a hardware structure of a moving object direction determination system using a UWB radar sensor according to another embodiment of the present invention, and a counting method using the system.
FIG. 7 is a view illustrating an observation area for explaining an algorithm and a hardware structure of a direction determination system and a counting method using a UWB radar sensor according to another embodiment of the present invention.
FIG. 8 is a diagram illustrating an example of an entry detection and personnel coefficient of an observation area for explaining an algorithm and hardware structure of a direction determination system and a counting method using a UWB radar sensor according to another embodiment of the present invention.
FIG. 9 is a view for explaining an algorithm and a hardware structure of a moving object direction determination system using a UWB radar sensor according to another embodiment of the present invention, and a counting method using the UWB radar sensor according to another embodiment of the present invention. Fig.

Specific features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. It is to be noted that the detailed description of known functions and constructions related to the present invention is omitted when it is determined that the gist of the present invention may be unnecessarily blurred.

A direction determination system for a moving object using a plurality of UWB Radar (Pulse Radar) sensors according to an embodiment of the present invention will be described with reference to the drawings. The UWB Radar of the present invention relates to the IR-UWB Radar Sensor System, and will be referred to as UWB Radar for convenience.

FIG. 1 is an overall configuration diagram of a direction determination system for a moving object using a UWB radar sensor according to an embodiment of the present invention. As shown in FIG. 1, a direction determination system for a moving object using a UWB radar sensor includes a UWB radar unit 100, a direction determination unit 200, and a coefficient unit 300.

The UWB radar unit 100 includes at least one UWB radar that performs signal processing by transmitting and receiving a pulse signal. The UWB radar radar should process the data by configuring the network with multiple radars rather than a single radar for accurate object recognition in a wider range.

The radar according to the present embodiment is an IR-UWB radar that generates a pulse from an antenna to receive a signal coming from a target object and recognizes the movement of the target, and can be used in a space with low power.

Such a UWB radar unit is a radar that receives a reflected signal from a target using a pulse signal at the time of transmission and extracts the distance and azimuth information of the target. This radar transmits and receives a pulse wave signal but can operate at a low power and requires two antennas for transmitting and receiving signals in one radar system. In the present invention, the radar system operates in a plurality of two or more, Can be detected.

As the amplitude of the UWB radar signal increases, it can be recognized as an object if it is larger than the set limit. When the radar signal detects a specific object, the amplitude becomes large. At this time, a threshold value for the recognition object is set, and when the amplitude becomes larger than the threshold value, it is recognized as detection.

The direction determination unit 200 determines a moving direction of an object by using a position and a time difference to enter a specific region of the UWB radar. The direction determination unit 200 for performing the function may include a time storage module 210 and a direction determination module 220.

The time storage module 210 may store the time when the target enters each radar (Radar1 or Radar2) when a plurality of objects pass through the observation area of the radar.

The direction determination module 220 determines the first direction when the entry time into the first radar is higher than the time when the entry time enters the second radar by using the difference of the arrival time of each radar in the time storage module, It is possible to determine the direction opposite to the first direction.

The counting unit 300 counts a moving object when a plurality of objects are simultaneously moved to a specific area of the UWB radar. The counting unit 300 for performing such a function may include a counter module 310 and a comparison determination module 320.

The counter module 310 functions to increase the counter corresponding to each direction every time a plurality of objects pass through the observation region of the radar.

The comparison determination module 320 compares the intensity of the radar signal with the threshold value that is set, and can calculate and acquire the number of mobile users.

2 is a conceptual diagram for determining and counting directions of a plurality of objects in a direction determination system for a moving object using a UWB radar sensor according to an embodiment of the present invention.

2, the time storage module 210 of the direction determination unit 200 determines the time when the target has entered each radar (Radar1 or Radar2) when a large number of objects (persons) Save time.

If the next target continues to move, it will detect the second radar (radar other than the radar detected when entering the first observation area), and save the time when the target enters each radar (Radar1 or Radar2) do.

The direction determination module 220 of the direction determination unit 200 determines whether the target has moved from Radar1 to Radar2 when the entering time to Radar1 is faster than the time when the entering time to Radar2 You can see that the target has moved from Radar2 to Radar1 if the entry time is reversed. This makes it possible to determine the moving direction of a large number of objects (persons).

The counting unit 300 increments the counter corresponding to each direction every time the object (person) passes through the observation region. The number of moving persons can be grasped by comparing the received signal strength with the set threshold value.

In this way, it is possible to determine the moving direction of a large number of objects (persons), and to grasp the number of movements in each direction.

3 is a diagram illustrating an overall flow of a counting method using a direction determination system for a moving object using a UWB radar sensor according to an embodiment of the present invention.

A counting method using a direction determination system of a moving object using a UWB radar sensor will be described with reference to FIG.

The control unit 400 of the direction determination system for moving objects using the UWB radar sensor receives data from at least one UWB radar unit in a specific area (S2).

Next, the control unit 400 determines the moving direction of the object using the position and time difference entering the specific region of the UWB radar (S4).

Then, the control unit 400 causes the moving object to be counted when a plurality of objects simultaneously move to a specific area of the UWB radar unit (S6).

4 is a flowchart illustrating a moving direction determination method of a counting method using a direction determination system of a moving object using a UWB radar sensor according to an embodiment of the present invention.

As shown in FIG. 4, in step S4, the controller stores the time when the target enters each radar (Radar1 or Radar2) when a plurality of objects pass through the observation area of the radar through the direction determination unit S42).

Next, the control unit determines in the first direction that the arrival time of the specific radar is faster than the time of entering the first radar into the first radar using the time difference of entering the specific radar through the direction determination unit, It is determined that the direction is opposite to the one direction (S44).

In step S4, the control unit can detect an object moving in the opposite direction and in a specific area simultaneously through the direction determination unit.

5 is a flowchart illustrating a counting method of a counting method using a direction determination system for a moving object using a UWB radar sensor according to an embodiment of the present invention.

As shown in FIG. 5, in step S6, the control unit increments the counter corresponding to each direction whenever a plurality of objects pass through the observation region of the radar through the counting unit (S62).

Next, the controller compares the intensity of the radar signal with the set threshold value through the counting unit to calculate the number of moving persons (S64).

FIG. 6 is a diagram illustrating an algorithm and a hardware structure of a moving object direction determination system using a UWB radar sensor according to another embodiment of the present invention, and a counting method using the system. As shown in FIG. 6, the control unit allows at least two or more IR-UWB radars to receive signals in the observation area, respectively. Next, the entrance detection and the number of persons are counted for each observation area. Next, the final movement number is determined from the entry time and the number of persons for each observation area.

FIG. 7 is a view illustrating an observation area for explaining an algorithm and a hardware structure of a direction determination system and a counting method using a UWB radar sensor according to another embodiment of the present invention.

As shown in FIG. 7, at least two IR-UWB radars each receive a signal of an observation region, and a controller corresponding to the signal receiving portion receives a signal of an observation region from each of the radars, To the MCU.

FIG. 8 is a diagram illustrating an example of an entry detection and personnel coefficient of an observation area for explaining an algorithm and hardware structure of a direction determination system and a counting method using a UWB radar sensor according to another embodiment of the present invention.

As shown in FIG. 8, the control unit counts the entrance detection and the number of persons for each observation area. The signal processing from the signal path received from the MCU corresponding to the signal processing unit, Information and the number of people. In this case, the signal processing unit may include a detection module for detecting entry, a time storage module for measuring an entry time, a direction determination module for determining an entry direction, a counter module for counting personnel, And the time and location information of the target and the number of people in each radar.

FIG. 9 is a view for explaining an algorithm and a hardware structure of a moving object direction determination system using a UWB radar sensor according to another embodiment of the present invention, and a counting method using the UWB radar sensor according to another embodiment of the present invention. Fig.

As shown in FIG. 9, the control unit judges the final movement number from the entry time and the number of persons for each observation area. The control unit collects each radar entry / exit data to determine each direction movement person, The MCU corresponding to the sub-unit compares the measured results from each radar and compares the passing times for each position so that the final pass-through for each direction can be determined.

While the present invention has been particularly shown and described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It will be appreciated by those skilled in the art that numerous changes and modifications may be made without departing from the invention. Accordingly, all such appropriate modifications and changes, and equivalents thereof, should be regarded as within the scope of the present invention.

100: UWB radar unit 200: direction determination unit
210: time storage module 220: direction determination module
300: counting unit 310: counter module
320: comparison determination module 400:

Claims (8)

delete delete delete delete A method of counting a moving object using a UWB radar sensor,
(a) a plurality of UWB radars each including a first radar and a second radar, which are two UWB radars, each receiving signals of a viewing region;
(b) causing the control unit to respectively store the time when the object passing through the observation area of each radar enters the first radar or the second radar, respectively;
(c) When the time when the controller enters the first radar is faster than the time when the controller enters the first radar using the position where the object passing through the observation area enters the specific area of each of the radar and the time of entry, Determining the direction of the first direction and determining the direction opposite to the first direction when the time entered into each radar is reversed;
(c-1) simultaneously detecting an object moving in a first direction and an object moving in a direction opposite to the first direction in the specific area;
(d) incrementing a counter corresponding to each direction each time the control unit passes a plurality of objects passing through the observation area and passing through the observation area of the radar; And
(e) comparing the radar signal intensity with a threshold value set by the controller, and calculating the number of people to be moved, using the UWB Radar Sensor. delete delete delete

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