JPH022493A - Illegal parking monitor system - Google Patents

Abstract

PURPOSE:To automatically decide an illegally parked vehicle by controlling the image pickup direction of an image pickup means in response to an illegal parking position output signal to pickup the vehicle number of the illegally parked vehicle. CONSTITUTION:When a vehicle is parked in an illegal parking monitor area, a detecting signal is outputted from a vehicle detector 11. When the detecting signal is applied for a prescribed time, an illegal parking position signal output means 22 outputs an illegal parking position signal. A camera control means 24 controls an universal head 2 in response to the illegal parking position signal and converts the direction so as to be turned to the monitor area corresponding to the vehicle detector 1 applying the detecting signal. A recognizing means 2 recognizes the number of the illegally parked vehicle based on the image pickup signal outputted from the camera 1 and outputs the recognized contents.

Description

[Detailed description of the invention] (Field of invention) The present invention relates to an illegal parking monitoring system.

(Prior Art and its Problems) Vehicles illegally parked on the roadside cause traffic congestion, and parked vehicles near intersections in particular seriously impede traffic flow.

Such enforcement of illegally parked vehicles is normally carried out by patrolling police officers, but if the enforcement has to target a large number of vehicles in a large patrol area, it may require a large number of police officers. There was a problem with that.

In addition, the conventional method of cracking down on illegal parking has been to detect illegally parked vehicles by checking the parked vehicles in the absence of the driver of the parked vehicle. Since it is not intended to prevent traffic jams from occurring, it has been difficult to obtain any practical enforcement effects that would avoid traffic congestion.

Recently, vehicles have been determined to be illegally parked by installing Kani TV cameras near illegal parking monitoring areas, controlling the monitoring TV cameras remotely from a central control center, and monitoring the resulting images. Although this method has been adopted, since it requires humans to monitor the image and determine whether the vehicle is illegally parked, it is still time-consuming and has not produced the substantial enforcement effect described above.

(Object of the Invention) The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an illegal parking monitoring system that automatically and quickly determines illegally parked vehicles without requiring any human effort. purpose.

Furthermore, it is an object of the present invention to provide an illegal parking monitoring system that exhibits a real-time enforcement effect that leads to the avoidance of traffic congestion and the like.

Furthermore, it is an object of the present invention to provide an effective illegal parking monitoring system near intersections.

(Structure and Effects of the Invention) In order to achieve such an object, the present invention has the following features:
In the illegal parking monitoring system of the present invention according to 1),
a vehicle detector disposed along a parking monitoring area; an imaging means for capturing the number of a parked vehicle in the parking monitoring area; and an imaging means configured to capture an image of the parked vehicles in the entire monitoring area. imaging direction converting means for converting the imaging direction of the vehicle; and when a detection signal is provided from a portion of the vehicle detector within a time period that reaches a set time, the detection signal corresponds to the vehicle detector to which the detection signal is provided. Illegal parking position signal output means for outputting an illegal parking position signal;
In response to the illegal parking position signal, a direction change signal is provided to the imaging direction changing means so that the imaging direction of the imaging means is set to the parking monitoring area device corresponding to the vehicle detector to which the detection signal is applied. Imaging direction conversion command means;
The present invention is configured to include a recognition means for recognizing the number of an illegally parked vehicle based on an imaging signal from the imaging means at the direction change position and outputting an output of the recognition content.

In the illegal parking monitoring system according to claim (2),
A display means for displaying a warning number of the illegally parked vehicle based on the recognition content output is provided at a position visible from the monitoring area.

In the illegal parking monitoring system according to claim (3),
The set time is longer than the lighting switching period of the signal lamp, and the signal lamp is arranged near the intersection where the signal lamp is installed.

According to the structure of the claimed invention, when a vehicle is parked in an illegal parking monitoring area so as to face a part of the vehicle detector, a detection signal is output from the vehicle detector, and the detection signal is set. When the illegal parking position signal output means outputs an illegal parking position signal, and the direction change command means outputs a direction change signal in response to the illegal parking position signal, the imaging direction conversion means converts the imaging direction of the imaging means so that the imaging means faces the monitoring area position corresponding to the vehicle detector that has given the detection ratio signal;
According to the configuration of the invention of claim (2), which is characterized by recognizing the number of an illegally parked vehicle based on the imaging signal captured by the imaging means and outputting the recognition content, the recognition content in the invention of claim (1) is characterized in that the number of the illegally parked vehicle is recognized and the recognition content is output. Based on the output, the display means displays a warning of the illegally parked vehicle number at a position visible from the monitoring area.

According to the structure of the invention of claim (3), when the detection time of illegal parking reaches a set time equal to or longer than the lighting switching period of a nearby signal light device, the recognition content output of the vehicle is output.

Therefore, according to the invention of claim (1), an illegally parked vehicle is determined based on the detection signal from the vehicle detector, and the license plate number of the vehicle is recognized by imaging by the imaging means. As such, it has become possible to quickly and automatically determine whether a vehicle is illegally parked without any human intervention, and to know the license plate number of the illegally parked vehicle.

In particular, since the imaging means is configured to operate only when illegal parking is detected, the imaging means can also be used for forming monitor images of traffic flow, etc., and has the advantage that the imaging means can be used effectively.

According to the invention of claim (2), the illegally parked vehicle number is displayed as a warning on the display means, so that a warning is given to the illegally parked person in real time, and the effect of controlling illegal parking violations is increased.

In the invention of claim (3), it is possible to accurately determine illegally parked vehicles and vehicles waiting at traffic lights at an intersection, and it can be effectively used at particularly large intersections where there is a problem with illegally parked vehicles.

(Description of Embodiments) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block circuit diagram showing the configuration of the illegal parking monitoring system, and FIG. 2 is a perspective view showing the arrangement at an intersection.

In these figures, numeral 1 is a television camera as an imaging means, 2 is a pan head as an imaging direction conversion means, the television camera 1 is rotatably provided with respect to the pan head 2, and there is a The tilting angle is changed by driving the provided drive motor, and the imaging direction is changed. Also, a TV camera! The camera is equipped with a zoom lens 4 and is configured to allow zoom control.

This TV camera l and pan head 2 are integrated into one.
Provided on a signal light device 8 provided near the intersection 6,
By changing the imaging direction of the TV camera l as described above, the camera is set to have a predetermined length from intersection 6 on the road side of the upstream road on the far side of intersection 6 (the near side in the figure). The configuration is such that it is possible to image the entire monitoring area IO.

Each of 11 is an electromagnetic induction type illegally parked vehicle detector, and is installed on the sidewalk 13 along the monitoring area IO. A detection signal is output when a vehicle is present in a magnetic field region formed on the monitoring area 10 by being received by the receiving unit. In addition to the above, a loop type vehicle detector, an ultrasonic type vehicle detector, etc. may be used as the illegally parked vehicle detector 11.

12 is a processing device, which is attached to the base of the ball 14 of the signal light device 8, and which is connected to the above-mentioned television camera l and pan head 2.
Illegal parking compatible terminal controller 15 and signal light device 8 corresponding to
It is equipped with a signal terminal controller (not shown) corresponding to the above.

The illegal parking compatible terminal controller 15 in the processing device 12 is
A conversion/sending unit 18 converts the imaging signal as image data from the television camera 1 into electric/optical (E/0) and sends the E10-converted imaging signal to the central processing unit I6. Recognition means 2 for recognizing the number of a parked vehicle and outputting the recognition number signal
0, an illegal parking position signal output means 22 that outputs an illegal parking position signal in response to a detection signal; an imaging direction that provides a zoom control signal to the television camera 1 and an depression angle control signal to the pan head 2; A signal for transmitting the recognition number signal from the television camera control means 24 and recognition means 20 as a conversion command means to the central processing unit 161111+, and transmitting the television camera control signal from the central processing unit 16 to the television camera control means 24. It is composed of an electric transmission section 26.

In this case, the recognition means 20, the illegal parking position signal output means 2
2 and the television camera control means 24 function as a control section 28 composed of a microcomputer, and operate according to a predetermined procedure based on the human program.

Reference numeral 30 denotes an electronic information display board as a display means, which is mounted on a ball 32 erected near the starting point 10a of the monitoring area IO at the stop line with its display surface facing toward the monitoring area IO. A display board controller 34 is attached to the base of the pole 32, and the display board controller 34 is connected to the central processing unit 16 and the processing unit 12, and displays electronic information based on display command signals given from each. A display signal is applied to the board 30, whereby the electronic information display board 30 performs appropriate display.

Next, the operation of the above system will be explained with reference to the flowchart of FIG.

First, it is determined whether or not there is a detection signal in the vehicle detector 11 (step S1), and if there is, time measurement is started (step S2), and then it is determined whether or not the measured time has reached a set time. (Step S3). If time has not elapsed after the start of detection and the set time has not been reached, it is further determined whether or not there is the above detection signal, that is, the detection signal from the same vehicle detector 11 as above (
Step S4). If the corresponding vehicle has moved and there is no detection signal, the process returns to step St. If there is a detection signal, the process returns to step S3, and it is again determined whether the set time has been reached. That is, the operations of step S3 and step S4 are repeated until the set time is reached in a state where an illegally parked vehicle is present.

When the set time is reached in step S3, an illegal parking position signal is output (step S5), and based on this illegal parking position signal, a zoom control signal is given to the TV camera l and a depression angle control signal is given to the pan head 2, and the corresponding illegal parking is The television camera 1 is directed toward the vehicle (step S6), and the number of the illegally parked vehicle is imaged (step S7).

As described above, when the angle of depression direction of the television camera l is changed, the imaging position becomes closer at the starting point IQa position of the monitoring area 10 and farther away at the ending point 10b position,
The image obtained at the end point 10b position becomes smaller. If the size of the obtained image changes in this way, the next operation, number recognition, cannot be performed properly. Therefore, a zoom control signal is given to the television camera 1, and zoom control is performed as the imaging direction changes. It is carried out.

A zoom control operation performed in conjunction with this imaging direction conversion will be explained.

Now, as shown in the side view of Fig. 4 and the plan view of Fig. 5,
The horizontal distance between the TV camera 1 and the imaging point 3 is X1 The installation height of the TV camera I is h1 The direct distance between the TV camera 1 and the imaging point 3 is y The width of the monitoring area 10 is Wa If the pixel length corresponding to the surveillance area width wa is vb, the angle of depression of the television camera l is θ, and the focal length of the television camera l is f, then in the positional relationship in the side view of FIG. 4, tanθ=h/x. x! +i, t=
A relational expression with yf is obtained, and a relational expression of waxf=wbxx is obtained in the positional relationship in the plan view of FIG. Therefore, from these three equations, finally f=[wbX(h'
A relational expression between the depression angle θ and the focal ratio @r can be obtained as follows: /lan”θ+l, f) I/J /wa.

That is, since Wa in the above final equation is constant with the width of the monitoring area lO, and wb is also constant with the pixel length of the image sensor, the depression angle θ and the focal ratio Mf are determined in a correlative manner. In this correlation, if the focal length f calculated by calculation is applied to the changing angle of depression θ, an image having a desired constant length can always be obtained.

For example, the starting point 10a position of the monitoring area IO is 10 m from the TV camera 1, and the ending point 10b position is 4 m.
0 m, the length of the monitoring area IO is 30 m, the width wa is 1.5 m, and the height h of the TV camera l is 6 m.
When using a CCD image sensor with a length wb of 2/3 inch as the mS image sensor, the depression angle θ changes in the range of about 31' to 8.5 degrees as the direction of the television camera changes, and the angle of depression θ changes in the range of about 31' to 8.5 degrees. By performing zoom control, the focal length f is changed from approximately 68 mm to 237 mm, so that an image of a constant length is always captured in a pixel having a length of 2/3 inch.

When an image is taken in step S7 and the image signal is given to the processing device 12, on the one hand, the image signal is converted to E10 by the conversion output section 18, and the optical fiber 3
6 to the central processing unit 116 side. The central processing unit 16 stores an image based on the image signal as evidence of illegal parking.

On the other hand, when the imaging signal is given to the recognition means 20 of the control unit 28, the vehicle number is recognized in the image based on the imaging signal by comparison with the recognition pattern (
Step S8) Outputs the recognized vehicle number signal (Step S9) This vehicle number signal is given to the central processing unit 16 side via the signal transmission section 26, whereby the central processing unit 16 outputs the illegally parked vehicle number signal. will be registered. On the other hand, a vehicle number signal is given to the electronic information display board 30 via the display board controller 34, so that the electronic information display board 30 can, for example,
Parking violation/12-34J should be displayed (step 510),
Finish the operation.

The above set time is at least longer than the switching cycle time of the red and blue display of the signal lamp 8. By doing so, it is possible to prevent a vehicle that is waiting at a traffic light, starts moving due to the change of the traffic light, and does not remain in the monitoring area IO to be determined as an illegally parked vehicle. can be clearly distinguished.

The television camera I is not used to take images of illegal parking while the illegal parking position signal is not output in step S5, and during that time it is used by remote control from the central processing unit 16 side. A monitor image is obtained and used to monitor traffic flow.

[Brief explanation of the drawing]

Figures 1 to 5 relate to embodiments of the present invention, in which Figure 1 is a block circuit diagram showing the configuration of an illegal parking monitoring system, Figure 2 is a perspective view showing the arrangement at an intersection, and Figure 3 is the operation. 4 is a side view for explaining the relationship between the depression angle and the focal length, and FIG. 5 is a plan view of the same. 1... Television camera (imaging means), 2... Pan head (imaging direction conversion means), 8... Signal lamp, 11... Vehicle detector, 20... Recognition means, 22... Illegal parking position signal output means, 24...TV camera control means (imaging direction conversion command means), 30...Electronic information display board (display means). Figure 3

Claims (3)

[Claims] (1) a vehicle detector disposed along a parking monitoring area; an imaging means for capturing the numbers of parked vehicles in the parking monitoring area; and a vehicle detector arranged so that the imaging means captures images of parked vehicles in the entire monitoring area; an imaging direction converting means for changing the imaging direction of the imaging means; and a vehicle detector to which a detection signal is given from a part of the vehicle detector in a time length that reaches a set time. an illegal parking position signal output means for outputting an illegal parking position signal corresponding to the illegal parking position signal; and the parking monitoring system that responds to the illegal parking position signal and changes the imaging direction of the imaging means to the vehicle detector to which the detection signal is applied. imaging direction change command means for giving a direction change signal to the imaging direction change means so as to set the area position; and recognizing the license plate number of an illegally parked vehicle based on the image signal from the imaging means at the direction change position; An illegal parking monitoring system comprising a recognition means for outputting content output. (2) The illegal parking monitoring system according to claim (1), further comprising display means for displaying a warning number of the illegally parked vehicle based on the output of the recognition content at a position visible from the monitoring area. (3) The illegal parking monitoring system according to claim (1), wherein the set time is longer than the lighting switching period of a signal lamp, and the illegal parking monitoring system is arranged near an intersection where the signal lamp is installed.