KR102316615B1 - System For Obtaining Information Using Radar And Method Thereof - Google Patents

Abstract

The present invention includes an information collecting device for collecting information on a moving target passing through a radar monitoring area, and a fixed target exposed and buried in the monitoring area. The information collecting device recognizes the moving target by analyzing the signal received after the radar transmission signal is reflected by the fixed target and the moving target, but the moving target is not detected after the radar transmission signal is blocked by the moving target If the fixed target is exposed again after leaving the monitoring area, it is confirmed whether the moving target is passing or not.

Description

System For Obtaining Information Using Radar And Method Thereof

The present invention relates to a system for collecting information using radar and a method therefor, and more particularly, to a radar capable of accurately detecting a moving target passing through a surveillance area using a radar and a fixed target serving as a reference point and reducing installation cost. It relates to an information collection system and method used therefor.

Because safety accidents of users working in harsh working environments such as power plants and steel mills occur frequently, various technologies are being developed to control unauthorized passage by monitoring objects (moving targets) using detectors installed in hazardous areas.

Currently, an unmanned speed enforcement system is being used to control whether the vehicle is speeding by photographing a vehicle traveling on the road using a camera.

In unmanned speed enforcement systems, it is common to use physical sensors such as lasers and loop sensors, and it is more common to use loop sensors. A loop sensor is installed at two predetermined points, a vehicle passing through the two points is sensed, and a speed is calculated using a transit time of the vehicle between the two points and a distance between the sensors. However, the loop sensor has limitations that are greatly affected by changes in inductance depending on the pavement condition of the road and the materials used, there is a significant performance difference due to poor construction, etc. have

Technology that processes images captured by a camera without using a physical sensor or collects vehicle information using ultrasonic waves has disadvantages in being vulnerable to climate change.

A new technology has been proposed that detects vehicle speed, occupancy time, occupancy, and vehicle length without being affected by climate change or road environment. For example, in Korean Patent Registration No. 10-1229028, a vehicle is detected using a radar signal detected from a radar and a magnetic field signal detected from a geomagnetic sensor is pattern recognized, and a vehicle detection result through radar and a pattern recognition result through a geomagnetic sensor are detected. A technology for detecting vehicle traffic information by interlocking the As another example, Korean Patent Registration No. 10-1916660 discloses a technique for resolving vehicle recognition errors by correcting the number of vehicles using an infrared sensor that measures the length of a vehicle when the number of vehicles is misrecognized by radar.

However, since the above patent documents apply a method of using a geomagnetic sensor or an infrared sensor in addition to the radar, when the technology for linking the radar signal and the sensor signal is satisfied, it is possible to obtain accurate information of the passing vehicle as well as the sensor Due to the construction work, the installation cost increases and the cost burden according to the replacement demand follows. In addition, there is a problem that the sensor by foreign substances or insects may cause a malfunction.

Although a technology for detecting a vehicle using only radar without using a physical sensor is disclosed, a rear vehicle v2 following from a shadow area H formed behind a front vehicle v1 as shown in FIG. When this is hidden or it is difficult to distinguish the head of the rear vehicle v2 that follows closely the rear of the front vehicle v1 as shown in FIG. 1B , the radar 10 does not recognize the vehicle. Also, when the front vehicle v1 and the rear vehicle v2 located in the monitoring area pass very closely as shown in FIG. There is a problem that this occurs.

Korean Patent Registration No. 10-1229028 (Registered on January 28, 2013) Korean Patent Registration No. 10-1916660 (Registered on November 02, 2018)

does not exist

The present invention has been devised to solve the above problems, and an object of the present invention is to provide an information collection system and method using a radar capable of accurately detecting a moving target passing through a surveillance area of the radar.

Another object of the present invention is to provide an information collection system and method using a radar that can improve the reliability of collected information by compensating for a position of the radar shaken by a typhoon or vibration.

An information collection system using a radar for achieving the above object includes: an information collection device for collecting information of a moving target passing through a monitoring area of the radar; A fixed target exposed and buried in the monitoring area; including, wherein the information collecting device recognizes a moving target by analyzing a signal received after a radar transmission signal is reflected by a fixed target and a moving target, but the radar transmission signal is It is characterized in that it is determined whether the moving target passes when the moving target leaves the monitoring area and the fixed target is exposed again after being blocked by the moving target and the fixed target is not detected.

In addition, the fixed target is characterized in that it is a flat plate made of a metal material.

In addition, the fixed target is characterized in that it is installed vertically below the radar.

In addition, the information collection device includes a digital signal processing unit for analyzing the signal reflected by the fixed target, wherein the digital signal processing unit is a fixed target for the position coordinates for the fixed target and the strength of the received signal reflected from the fixed target It characterized in that it includes a position compensator for zero-adjusting the position coordinates of the fixed target and the intensity of the radar transmission signal based on the information.

A method of collecting information using a radar for achieving the above object includes: transmitting a signal to a monitoring area through a transmission antenna of a radar installed in a structure; Receiving a signal reflected by a fixed target and a moving target in the surveillance area through a receiving antenna of the radar; and determining whether the moving target passes when the digital signal processing unit that analyzes the signal received through the reception antenna detects the fixed target after not being detected by the moving target.

In addition, it characterized in that it comprises the step of zero-adjusting the position coordinates of the fixed target and the signal strength of the radar based on the information on the strength of the signal reflected by the fixed target position coordinates and the fixed target.

In addition, if the result of searching for the position of the fixed target in the zero adjustment step is different from the setting information, it is characterized in that the position coordinates for the fixed target are changed.

According to the present invention, it is possible to accurately recognize a moving target in a shaded area and a moving target passing close to each other, and to improve the reliability of the collected information by adjusting the position coordinates of the fixed target and the signal strength of the radar to zero.

Since the present invention uses a fixed target buried in the monitoring area, the construction is simple, the cost burden is reduced, the influence on climate change or the road environment can be excluded, and replacement and repair work are easy.

1 is a view for explaining a detection operation of a moving target according to the prior art;
2 is a diagram showing the configuration of an information collection system using a radar according to the present invention by way of example;
3 is a block diagram of an information collection system using a radar according to the present invention;
4 to 11 are views exemplarily showing each case for the information collection system using a radar according to the present invention to collect information;
12 is a flowchart illustrating a method for collecting information using a radar according to the present invention.

Hereinafter, the present invention will be described by describing embodiments of the present invention with reference to the accompanying drawings. Like reference numerals in each figure indicate like elements. Also, in describing the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, when a part "includes" a certain component, this means that other components may be further included rather than excluding other components unless otherwise stated.

The present invention can be applied to controlling a worker installed in a monitoring area with the intention of preventing a safety accident of a user who is active in a poor working environment such as a power plant or a steel mill. In addition, in the embodiment of the present invention, a case in which information of passing vehicles is collected as a moving target traveling on various roads such as intersections and highways will be described.

As shown in FIG. 2 , the information collection system using a radar according to the present invention includes an information collection device 200 for detecting a passing vehicle using a radar stored in a cabinet 250 mounted on a structure such as a column, and a radar. Includes a fixed target (100) buried in the monitoring area (K) of.

The information collecting device 200 is for collecting information on vehicles passing on various roads such as intersections and highways, and may be installed by being mounted on the upper part of the road.

The fixed target 100 is exposed and installed in the vertical direction downward from the information collecting device 200 . The fixed target 100 is made of a metal plate and can be buried. The fixed target 100 has a unique RCS (RADAR Cross Section) value and has a fixed position value.

The information collection device 200 may recognize the fixed target 100 using a radar and detect information of a passing vehicle as a moving target passing through the monitoring area K using the fixed target 100 as a reference point.

Referring to FIG. 3 , the information collecting device 200 is based on a frequency modulated continuous wave (FMCW) radar. Frequency modulated continuous wave radar transmits a triangular or sawtooth wave signal that changes linearly with time to receive a signal reflected from a target, and applies dechirping technology that multiplies the received signal and the transmitted signal. The dechirping technology generates a sine wave whose frequency is proportional to the distance between the radar and the target, and can obtain an intermediate frequency band of approximately several hundred Hz to several tens of MHz, which is much lower than the center frequency. The bit signal generated through the dechirping technique is extracted using a method of multiplying (Mix) the received signal reflected from the target and the transmitted signal. When the multiplied signal passes through a low-pass filter, a desired beat signal can be obtained, and the bit frequency includes distance information.

The information collection device 200 may be roughly divided into a radar signal processing unit 201 and a radar transceiving unit 202 . The radar signal processing unit 201 includes a control unit 210 for controlling the overall operation of the radar, a radar waveform generating unit 211 for generating a radar waveform of a triangular wave or a sawtooth wave, a signal converter (DAC) 212, a signal converter (ADC) 220 , a digital signal processing unit 230 , and a display unit 240 . The radar transceiver unit 202 includes a VCO 213 , an amplifier (AMP) 214 , a transmit antenna 215 , a receive antenna 216 , a low noise amplifier (LNA) 217 , a mixer 218 , and an amplifier (AMP). (219).

The radar transceiver 202 generates a linear radar transmission signal as a signal matching the center frequency using the VCO 213 and then transmits the signal toward the target through the transmission antenna 215 . A reflected signal delayed in time according to the distance between the radar and the target is received through the receiving antenna 216 , and the received signal generates a sine wave of a beat frequency component through a dechirp technique using the mixer 218 . The bit frequency signal passes through a multi-stage amplifier 219 of approximately 60 to 70 dB gain and a low-pass frequency filter (not shown) of several tens of MHz, and is sampled through the signal converter 220 of the radar signal processing unit 201 for digital reception converted to a signal. The digital signal processing unit 230 extracts a frequency component from the converted digital signal through a spectrum analysis algorithm, and may know the relative distance between the reflected signal and the radar through the extracted frequency. And the speed and angle of the target can be extracted through the phase difference between each received signal. To this end, the digital signal processing unit 230 includes a distance calculation unit 231 , a speed calculation unit 232 , an object detection unit 233 , an angle calculation unit 234 , a fixed target detection unit 235 , and a position compensation unit 236 . include The distance calculator 231 calculates a relative distance to the target through a spectrum analysis algorithm (FFT), and calculates a relative distance between the fixed target 100 and the moving target v1, ..., vm. In addition, the angle calculator 234 and the speed calculator 232 calculate the angle and speed of the moving target by using the phase difference between the received signals, respectively.

The object detection unit 233 analyzes the converted digital signal, removes white noise, distinguishes whether the received signal is a signal reflected by an object (target), and detects whether the received signal is a target.

The fixed target detection unit 235 detects whether the received signal is a signal reflected from the fixed target 100 . The fixed target detection unit 235 stores the position coordinates and the intensity information of the reflected signal for the fixed target 100 in advance in a table, and compares the information stored in the table with the signal strength and the position calculated from the received signal to determine the fixed target (100) can be detected.

The position compensator 236 compensates for the position error when a position error occurs in which the position coordinates of the fixed target 100 detected by the fixed target detection unit 235 are different from the position coordinates stored in the table. For example, when the radar accommodated in the cabinet 250 mounted on the structure is shaken by wind or vibration, it may deviate from the initial position.

In consideration of this, the control unit 210 of the information collection apparatus 200 may improve the reliability of the collected information by performing a process of compensating for the position of the fixed target 100 before collecting the information of the moving target.

Hereinafter, each case for collecting information of a moving target according to the present invention will be described with reference to FIGS. 4 to 11 .

When the large vehicle v1 enters the radar monitoring area K as a moving target in (a) of FIG. 4 , the fixed target 100 and the large vehicle v1 are exposed to the monitoring area K, so transmission reflects the radar signal. The result of receiving the signal reflected from each target and processed by the digital signal processing unit 230 is displayed as shown in FIG. 4 (b) through the display unit 240, at the detection time point (x11) at the fixed target 100. The corresponding identification mark Pr and the identification mark Pv1 corresponding to the large vehicle v1 appear simultaneously. In this case, the distance between the fixed target 100 and the large vehicle v1 is calculated by the distance calculating unit 231 , and the fixed target 100 appears to be spaced apart from the radar by a reference distance y1 in correspondence to the fixed position.

The large vehicle v1 travels and passes above the fixed target 100 . In FIG. 5A , when the large vehicle v1 passes the fixed target 100 , the radar transmission signal is blocked by the large vehicle v1 . Accordingly, the result of receiving the signal reflected from each target and processing it in the digital signal processing unit 230 is displayed as shown in FIG. 5 (b) through the display unit 240, and the fixed target 100 ) does not appear and only the identification mark Pv1 corresponding to the large vehicle v1 is displayed. The size of the identification mark Pv1 in FIG. 5(b) is larger than the identification mark Pv1 shown in FIG. 4(b). This is due to an increase in the occupancy time of the large vehicle v1 in the monitoring area K.

Then, as in FIG. 6 (a), when the large vehicle v1 passes the monitoring area K and a small vehicle v2 and another large vehicle v3 following from the rear enter, the fixed target 100 is again exposed. Based on this, the large vehicle v1 that passed earlier is recognized as having passed the monitoring area K, and the number of passing vehicles is counted and increased. The result of receiving the signal reflected from each target and processed by the digital signal processing unit 230 is displayed as shown in FIG. Corresponding identification marks Pr, identification marks Pv2 (Pv3) corresponding to the small vehicle v2 and the other large vehicle v3 appear simultaneously. In FIG. 6B , the small vehicle v2 and the other large vehicle v3 that have entered the monitoring area K are in close proximity to each other, so that the corresponding identification marks Pv2 and Pv3 are partially overlapped.

Afterwards, when the small vehicle v2 and the other large vehicle v3 continue to enter the monitoring area K and the small vehicle v2 passes over the fixed target 100, as in FIG. 7 (a), the fixed target At 100, the radar signal is blocked by the small vehicle v2. The result of receiving the signal reflected from each target entering the monitoring area K and processing in the digital signal processing unit 230 is displayed as shown in FIG. 7 (b) through the display unit 240, the detection time (x14) ), the identification mark Pr corresponding to the fixed target 100 does not appear, and the identification marks Pv2 and Pv3 corresponding to the small vehicle v2 and the other large vehicle v3 appear at the same time. At this time, the identification mark Pv2 of the small vehicle v2 is partially overlapped on the identification mark Pv3 having a close relative distance to the radar among the targets entering the monitoring area K.

Thereafter, as in (a) of FIG. 8 , when the small vehicle v2 passes through the monitoring area K and another large vehicle v3 continues to drive from the rear, the fixed target 100 is exposed again. Based on this, the number of passing vehicles is counted and increased with respect to the small vehicle v2 that has passed previously. The result of receiving the signal reflected from each target in the monitoring area K and processing by the digital signal processing unit 230 is displayed as shown in FIG. 8 (b) through the display unit 240, at the detection time point (x15) The identification mark Pr corresponding to the fixed target 100 and the identification mark Pv3 corresponding to the other large vehicle v3 appear simultaneously.

As another example, when other small vehicles (v4) (v5) enter the monitoring area (K) and the small vehicle (v4) passes over the fixed target 100, as in FIG. At 100, the radar signal is blocked by the leading small vehicle v4. The result of receiving the signal reflected from each target entering the monitoring area K and processing by the digital signal processing unit 230 is displayed as shown in FIG. 9 (b) through the display unit 240, the detection time (x16) ), the identification mark Pr corresponding to the fixed target 100 does not appear, and the identification marks Pv4 and Pv5 corresponding to the other small vehicles v4 and v5 appear at the same time. At this time, the identification mark Pv5 of the other small vehicle v5 appears on the identification mark Pv4 having a close relative distance to the radar among the targets entering the monitoring area K.

Thereafter, as in FIG. 10( a ), when the small vehicle v4 passes through the monitoring area K and another small vehicle v5 continues to drive from the rear, the fixed target 100 is exposed again. Based on this, the number of passing vehicles is counted and increased with respect to the small vehicle v4 that has passed earlier. The result of receiving the signal reflected from each target in the monitoring area K and processing by the digital signal processing unit 230 is displayed as shown in FIG. 10 (b) through the display unit 240, at the detection time point (x17) The identification mark Pr corresponding to the fixed target 100 and the identification mark Pv5 corresponding to the other small vehicle v5 appear simultaneously.

On the other hand, when the cabinet 250 is mounted on the structure, and the radar accommodated in the cabinet 250 is shaken by wind or vibration, it may deviate from the initial position. It is assumed that the cabinet 250A is moved from the initial position as shown in FIG. 11A . When the small vehicle v2 enters the monitoring area K as a moving target, the fixed target 100 and the small vehicle v2 are exposed to the monitoring area K and thus reflect the transmitted radar signal. The result of receiving the signal reflected from each target and processed by the digital signal processing unit 230 is displayed as shown in FIG. The corresponding identification mark Pr and the identification mark Pv2 corresponding to the small vehicle v2 appear simultaneously. However, since the detection result is a result detected by the radar whose position is changed, position compensation is required. The position compensator 236 calculates a position error by comparing the initially set radar position coordinates with the current radar position coordinates, and compensates for the position of the radar by the calculated position error so that the position error is reduced as shown in FIG. 11(c). Displays the rewarded processing result. As described above, by performing a position compensation process of zero-adjusting the position coordinates of the fixed target 100, the reliability of the collected information of the passing vehicle is improved.

12 is a flowchart illustrating a method for collecting information using a radar according to the present invention.

First, the controller 210 of the information collection device 200 receives an initialization command from a user from an external device and performs an initialization process of setting information for the fixed target 100 . Here, the initialization process includes the process of setting the position coordinates of the fixed target and the intensity information of the received signal reflected from the fixed target.

The control unit 210 determines whether the fixed target setting flag Ft is set to '1' (S10), and when the fixed target setting flag Ft is not set to '1', the preset position coordinates of the fixed target and fixed Set fixed target information on the strength of the received signal reflected from the target (S20).

The waveform generator 211 is operated under the control of the controller 210 to transmit a test signal through the transmit antenna 215 of the radar transceiver 201 , and from the fixed target 100 through the receive antenna 216 . The reflected signal is received (S30). Here, the test signal can transmit and receive a frequency-modulated continuous wave (FMCW) for a certain period of time (2 to 3 seconds) in order to recognize the position of a fixed target that serves as a reference point for detecting a passing vehicle and to adjust the radar signal strength to zero.

The digital signal processing unit 230 outputs a result of signal processing the reflected test signal to the control unit 210 . The control unit 210 determines whether to detect the fixed target 100 according to the detection result from the fixed target detection unit 235 (S40). When the fixed target 100 is detected, the control unit 210 calculates the position coordinates of the fixed target according to the detection results from the distance calculation unit 231 , the speed calculation unit 232 , and the angle calculation unit 234 , and sets the fixed target position in advance. It is determined whether compensation for the position coordinates of the fixed target 100 is compared with the position coordinates of the target (S50). The controller 210 outputs a position compensation command to the position compensator 236 when the position of the fixed target 100 is changed, and the position compensator 236 compensates for the changed position of the fixed target. Thereafter, the fixed target setting flag Ft for the fixed target 100 is set to '1' (S70). If the fixed target 100 is not detected, the setting information of the fixed target is incorrect, so the information of the fixed target is changed (S80).

As such, after the error diagnosis process (S10 to S90) for the zero point adjustment for the position coordinates for the fixed target 100 and the strength of the reflected received signal is completed, the moving target passing vehicle entering the monitoring area (K) A sensing operation is performed.

As the radar signal processing unit 201 and the radar transceiver 202 operate under the control of the control unit 210, the radar signal is transmitted to the monitoring area K, and the fixed target 100 and the moving target are driven by a passing vehicle. The reflected signal is received (S90).

The digital signal processing unit 230 outputs a detection result of the received signal through an analysis algorithm to the control unit 210 . The control unit 210 determines whether a fixed target is detected according to the detection result of the fixed target detection unit 235 (S100). When the fixed target 100 is detected, it is recognized that the reflected signal is received while the fixed target 100 is not covered by a passing vehicle and is exposed. At the same time, the control unit 210 determines whether a moving target vehicle is detected in the monitoring area K (S110). If the moving target is not detected, it is recognized that the passing vehicle is not detected (S120).

If the fixed target 100 is not detected in step S100, it is recognized that the transmission signal is blocked by the passing vehicle and recognizes that there is a passing vehicle (S130).

If both the fixed target and the moving target are detected as a result of the determination in step S110 or only the moving target is detected in step S130, the digital signal processing unit 230 calculates the speed, distance, and occupancy time of the passing vehicle, and the number of passing vehicles by vehicle type counts and outputs the result to the display unit 240 and outputs the detection result to the control unit 210 . That is, vehicle information on a vehicle passing through the monitoring area K may be output through the display unit 240 and transmitted to an external device through the control unit 210 at the same time.

The above description of the present invention is for illustration, and those of ordinary skill in the art to which the present invention pertains can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. That is, all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention.

100: fixed target 200: information collection device
201: radar signal processing unit 202: radar transceiver unit

Claims (7)

It is buried in the bottom of the road below the radar in the vertical direction so that the moving target can pass without interference within the radar monitoring area (K), and the fixed target 100 that reflects the radar's transmission signal by exposing the upper part of the metal plate ); and
The radar is spaced apart from the upper part in the vertical direction of the fixed target, and in the radar monitoring area K, time Including an information collection device 200 having a digital signal processing unit 230 for receiving the delayed reflected signal, converting it into a digital signal and processing,
The digital signal processing unit 230 calculates the speed and angle of the target through the distance calculation unit 231 for calculating the relative distance between the target and the radar by using a spectrum analysis algorithm for the received signal, and the phase difference of each received signal. a speed calculation unit 232 and an angle calculation unit 234, and an object detection unit 233 for detecting whether an object corresponding to a target is an object through analysis of the converted digital signal,
The digital signal processing unit 230 detects a fixed target by receiving a radar transmission signal reflected from a fixed target located vertically downward within the radar monitoring area K during radar operation, and detects a fixed target with the detected fixed target. Together, it detects a moving target that has entered the radar monitoring area (K), and when a moving target moving within the radar monitoring area (K) passes the upper part of the fixed target, the radar's transmission signal is reflected from the moving target that blocks the fixed target. As a result, the fixed target is temporarily undetected. After that, the moving target deviates from the radar monitoring area (K) and receives the radar transmission signal reflected from the vertically lower fixed target. If the fixed target is detected again, the moving target is An information collection system using a radar, characterized in that it is counted by determining that it has completely passed the radar monitoring area (K).

delete delete According to claim 1,
The digital signal processing unit 230 compares the position calculated from the received signal with the signal strength using a table in which the position coordinates for the fixed target and the intensity information of the reflected signal are stored, and a fixed target detection unit 235 for detecting the fixed target; As a test signal, a frequency-modulated continuous wave (FMCW) is transmitted for a certain period of time, and the position coordinates and signal strength of the fixed target calculated based on the signal reflected from the fixed target are compared with the position coordinates and signal strength of the fixed target stored in the table. The information collection system using radar, characterized in that it comprises a position compensation unit (236) for zero-adjusting the position coordinates of the fixed target and the intensity of the radar transmission signal according to the . The fixed target 100 and the fixed target 100 are buried in the bottom of the road vertically downward of the radar so that the moving target can pass without interference within the radar monitoring area (K) and the upper part of the metal plate is exposed. In the radar monitoring area (K), the radar is installed spaced apart from the top in the direction In the information collection method using the radar to collect the passage information of the moving target passing through the radar monitoring area (K) through the information collection device 200 for processing,
performing an initialization process of setting information for a fixed target according to an initialization command (S10 to S80);
As the radar signal processing unit 201 and the radar transceiver 202 operate under the control of the controller 210, the radar signal is transmitted to the radar monitoring area K, and the signal reflected by the fixed target and the moving target is received. to (S90);
The digital signal processing unit 230 outputs a result detected by using a spectrum analysis algorithm for the received signal to the control unit 210, and the signal reflected from the exposed fixed target that is not covered by the moving target by the control unit 210 detecting a fixed target by recognizing it as (S100);
Detecting a moving target by receiving a signal reflected from the moving target (S110) (S130);
When the fixed target is obscured by the moving target, the fixed target is not detected, and when the moving target does not cover the fixed target, the result of detecting the fixed target is analyzed to collect travel information of the moving target (S140). but,
In the information collection step (S140), the digital signal processing unit 230 detects a fixed target by receiving a radar transmission signal reflected from a fixed target located vertically downward in the radar monitoring area K during radar operation. , detects a new moving target entering the radar monitoring area (K) together with the previously detected fixed target. The fixed target is temporarily undetected by being reflected from the moving target covering the target, and then the moving target deviates out of the radar monitoring area (K) and receives the radar transmission signal reflected from the fixed target located vertically below the fixed target. When this is detected again, the method of collecting information using radar, characterized in that the moving target is determined to have completely passed the radar monitoring area (K) and counted. 6. The method of claim 5,
The step of performing the initialization process of setting information for the fixed target (S10 to S80) is to transmit a frequency-modulated continuous wave (FMCW) as a test signal for a predetermined time and the position of the fixed target calculated based on the signal reflected from the fixed target A radar, characterized in that the position compensation unit 236 zero-adjusts the position coordinates of the fixed target and the strength of the radar transmission signal according to the result of comparing the coordinates and signal strength with the position coordinates and signal strength of the fixed target stored in the table. The information collection method used.
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