JPH05274590A - Measuring instrument and display device for the number of vehicles in tunnel - Google Patents

Abstract

PURPOSE:To accurately measure and display the number of vehicles in a tunnel. CONSTITUTION:This system is provided with an inflow detecting part 2 arranged on a vehicle inflow part in an automobile tunnel 1 to execute image processing based upon the number plate of an inflow vehicle, convert the inflow vehicle number into an inflow digital signal and output the signal, an outflow detecting part 4 arranged on a vehicle outflow part 5 in the tunnel 1 to execute image processing based upon the number plate of an outflow vehicle, convert the outflow vehicle number into an outflow digital signal and output the signal and a number of vehicles computing part 6 for storing successively inputted inflow digital signals, erasing one stored inflow digital signal in each input of the outflow digital signal and outputting the current number of vehicles in the tunnel 1 based upon remaining digital signals as a unit number digital signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measuring device and a display device for measuring the number of vehicles in an automobile tunnel and displaying the number of vehicles.

[0002]

2. Description of the Related Art Generally, in an automobile tunnel such as an expressway, it is a very important management issue to deal with fire, accident or traffic jam in the tunnel. Therefore, conventionally, in order to grasp the traffic flow in the tunnel, the number of vehicles M in the tunnel is calculated from the number Q of vehicles inflowing per hour at the inflow portion of the tunnel, the average or sampling vehicle speed V, and the tunnel length L as It is estimated by.

M = Q / V × L

Further, an ITV is provided at the inflow part or the inside of the tunnel to visually estimate and complement the traffic volume.

[0005]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The number of vehicles in a tunnel is estimated from the number of inflowing vehicles per unit time such as 1 hour or 5 minutes and the vehicle speed per hour, and the traffic volume is visually estimated by ITV. However, even if it can be used to drive the ventilation automatic control device in the tunnel, it is not possible to grasp the actual number of vehicles in the tunnel, which lacks accuracy, especially in the event of an accident. There is a problem that it is not practically used during traffic jams and is extremely inconvenient for management.

The present invention has been made in consideration of the above points, and an object of the present invention is to provide a measuring device and a display device for the number of vehicles in a tunnel, which is capable of accurately measuring and displaying the actual number of vehicles in the tunnel. And

[0007]

In order to solve the above-mentioned problems, a device for measuring the number of vehicles in a tunnel according to the present invention is installed in a vehicle inflow portion of a tunnel for automobiles, and an image processing is performed from a number plate of an inflow vehicle to inflow. An inflow detection unit that converts the vehicle number into an inflow digital signal and outputs it, and an outflow detection that is installed in the vehicle outflow portion of the tunnel and performs image processing from the number plate of the outflow vehicle and converts the outflow vehicle number into an outflow digital signal and outputs it. Section and the inflow digital signals that are sequentially input are stored and stored, and the inflow digital signals that are stored and stored for each input of the outflow digital signal are deleted, and the current number of vehicles in the tunnel is output as a digital signal for the number of vehicles in the tunnel from the residual digital signal. And a vehicle number calculation unit that operates. In addition, a vehicle number display unit for numerically displaying the number digital signal of the vehicle number calculation unit is visually provided.

[0008]

In the device for measuring the number of vehicles in the tunnel according to the present invention having the above-described structure, the inflow detection section performs image processing on the number plate of the inflowing vehicle to convert the inflowing vehicle number into an inflowing digital signal and outputs it. The outflow detection unit image-processes the number plate of the outflow vehicle to convert the outflow vehicle number into an outflow digital signal and outputs it, and the vehicle number calculation unit stores and accumulates the inflow digital signals sequentially input, and outputs the outflow digital signal. Since the inflow digital signal stored and accumulated for each signal input is deleted and the current number of vehicles in the tunnel from the residual digital signal is output as the number of vehicles digital signal, the actual number of vehicles in the tunnel can be accurately measured. it can. In addition, since the number of vehicles display section displays numerical values in a visually recognizable manner,
It is possible to accurately grasp the actual number of vehicles and is extremely effective for more accurate ventilation control and disaster prevention control.

[0009]

EXAMPLE One example will be described with reference to FIGS. In FIG. 1, reference numeral 1 is a tunnel for automobiles such as highways, and 2 is an inflow detection section installed in a vehicle inflow section 3 of the tunnel 1. Image processing is performed from the number plate of the inflow vehicle and the inflow vehicle number is an inflow digital signal. Converted to and output. An outflow detection unit 4 is installed in the vehicle outflow unit 5 of the tunnel 1. The outflow vehicle number is image-processed from the number plate of the outflow vehicle to convert the outflow vehicle number into an outflow digital signal and output it. Reference numeral 6 denotes a vehicle number calculation unit, which stores and accumulates the inflow digital signals sequentially input from the inflow detection unit 2, and erases the stored inflow digital signal each time the outflow digital signal is input from the outflow detection unit 4. The current number of vehicles in the tunnel 1 is output as a number-of-vehicles digital signal from the residual digital signal.

Reference numeral 7 is a vehicle number display section for numerically displaying the number digital signal of the vehicle number calculation section 6 in a visible form, and 8 is recording the number digital signal of the vehicle number calculation section 6 on a paper or other recording medium at an arbitrary timing. The number of vehicles recording section,
Reference numeral 9 denotes a vehicle number output unit which outputs the number digital signal of the vehicle number calculation unit 6 to another device as data in the form of an electric signal.

Moreover, in the tunnel 1, generally, there is no branch road into which the vehicle normally flows in or out, and no U-turn is made. Therefore, a vehicle entering the tunnel 1 from the vehicle inflow portion 3 is always a vehicle. This is because the vehicle exits from the outflow section 5, and its point is focused on. By storing and storing the vehicle number that has passed through the vehicle inflow section 3, and deleting the vehicle number that has passed through the vehicle outflow section 5, the inside of the tunnel 1 The current number of vehicles can be accurately measured, and it is extremely important information for ventilation control and disaster prevention control such as water spray at the time of fire. And,
It can be grasped accurately by displaying numerical values in a visible form.

FIG. 2 shows an example panel 1 of the vehicle number display section 7.
0 is displayed and the number of vehicles is displayed on the panel 10 for each of the tunnels in each region by the up lane and the down lane, so that the number of vehicles can be more accurately grasped.

[0013]

Since the present invention is configured as described above, it has the following effects. The inflow detection unit 2 detects the vehicle number of the inflow vehicle into the tunnel 1, the inflow detection unit 4 detects the vehicle number of the outflow vehicle from the tunnel 1, and the vehicle number calculation unit 6 stores and accumulates the vehicle number of the inflow vehicle. The memory is deleted by the vehicle number of the outflow vehicle, and the number of vehicles is measured by the number of vehicles remaining in the tunnel. Therefore, the actual number of vehicles in the tunnel 1 can be accurately measured in real time.
Further, since the number of vehicles is numerically displayed in a form that can be visually recognized by the number-of-vehicles display unit 7, the number of vehicles in the tunnel 1 can be grasped extremely accurately.

[Brief description of drawings]

FIG. 1 is a schematic diagram of one embodiment of the present invention.

FIG. 2 is an example of a panel of a vehicle number display section of FIG.

[Explanation of symbols]

 1 Automotive Tunnel 2 Inflow Detection Section 3 Vehicle Inflow Section 4 Outflow Detection Section 5 Vehicle Outflow Section 6 Vehicle Number Calculation Section 7 Vehicle Number Display Section

Claims (2)

[Claims] 1. An inflow detector installed in a vehicle inflow section of an automobile tunnel, which performs image processing from a number plate of an inflow vehicle to convert an inflow vehicle number into an inflow digital signal and outputs the inflow detection section, and a vehicle outflow section of the tunnel. An outflow detection unit which is installed and performs image processing from the number plate of the outflow vehicle to convert the outflow vehicle number into an outflow digital signal and outputs the same, and the inflow digital signal which is sequentially input is stored and accumulated, and each outflow digital signal is input. A device for measuring the number of vehicles in a tunnel, which has a unit for calculating the number of vehicles in the tunnel as a digital signal of the number of vehicles currently in the tunnel from the residual digital signal by deleting the inflowing digital signals stored and accumulated in. 2. The display device for the number of vehicles in a tunnel according to claim 1, further comprising a vehicle number display section for numerically displaying the number digital signal of the vehicle number calculation section in a visually recognizable manner.