JPH0566480B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a tunnel ventilation control device, and more particularly to a tunnel ventilation control device that uses a control computer to control the process of ventilation fans in order to reduce contamination within a tunnel. .

[Technical background of the invention]

Traditionally, tunnel ventilation control equipment uses VI meters (smoke permeability meters) and CO meters (carbon monoxide concentration meters) as sensors to measure the degree of contamination inside the tunnel.
A process control method is used to control the operation of ventilation fans and change the air volume inside the tunnel so that the amount of contamination is within a certain value. In particular, in a longitudinal ventilation system that uses a jet fan installed inside a tunnel as a ventilation fan, the distribution of contaminated air inside the tunnel is estimated from the measurement data of the VI meter and CO meter, and the driving direction of the jet fan is determined. ing. The conventional device will be described below with reference to FIG. 4 of the accompanying drawings. In addition, in the description of the drawings, the same elements are indicated by the same symbols.

FIG. 4 is a block diagram of an example of a conventional device.
VI totals 20 and 21 are provided at both entrances of the tunnel 2 through which the automobile 1 travels, and jet fans 30 and 31 for ventilation are provided within the tunnel 2. In addition, as shown in the figure, a control computer 1
0 has four types of software blocks indicated by numerals 11, 12, 13, and 14. That is,
A contamination data smoothing program 11 smoothes the input data from the VI totals 20 and 21 to remove signals of short-period fluctuation components unsuitable for control, and the contamination data obtained by this contamination data smoothing program 11 is used to create a tunnel. The distribution of contamination inside the tunnel 2 is estimated based on the pollution data obtained by the ventilation air volume determination program 12, which calculates the air volume required for ventilation inside the tunnel 2, and the pollution data smoothing program 11, and the operating direction of the jet fans 30, 31 is estimated. It has a ventilation direction determining program 13 for determining the ventilation direction and a fan control program 14 for controlling the jet fans 30 and 31 according to the air volume and wind direction determined by the ventilation air volume determining program 12 and 13.

The VI meters 20 and 21 are installed inside the tunnel 2, and are a type of sensor for measuring the amount of pollution inside the tunnel 2. This VI total 20.2
1 outputs an analog value corresponding to the amount of contamination within the tunnel 2 to the control computer 10. Note that the ventilation jet fans 30 and 31 are driven by the output from the fan control program 14 to ventilate the inside of the tunnel 2.

In this way, the system from the VI totals 20, 21 to the jet fans 30, 31 transports the air in the tunnel 2 contaminated by the vehicle 1 to the jet fans 3.
0.0,31 constitutes a ventilation process (tunnel ventilation process).

During control using the VI totals 20 and 21 in the configuration shown in FIG. 4, the control computer 10
VI samples a total of 20 and 21 analog values,
A contamination amount smoothing program 11 smoothes short-period fluctuation components unsuitable for control to obtain an average value of the contamination amount.
When controlling the jet fans 30, 31, the number and direction of operation of the jet fans 30, 31 are determined by the ventilation air volume determining program 12 and the ventilation direction determining program 13. According to these, the jet fans 30 and 31 are controlled by the fan control program 14, and the tunnel 2 is properly ventilated.

[Problems with background technology]

When performing ventilation control as described above, the operating direction of the jet fan is usually determined according to the magnitude of the difference in contamination levels detected by two or three VI meters, but this conventional method includes the following: There is a problem like this.

The pollution inside the tunnel detected by the VI meter is smoke, but smoke tends to locally concentrate and stagnate. Therefore, when the operating direction of the fan is determined based on the results obtained from a sensor such as a VI meter, the fan is likely to be operated in a direction that is not efficient for ventilation. This is because the traffic ventilation force caused by vehicles passing through the roadway inside the tunnel and the natural ventilation force caused by the pressure difference between the tunnel entrances have a large effect on tunnel ventilation. . If such inefficient operation is carried out, it is likely that a large number of jet fans will be operated even under normal ventilation conditions, and furthermore, the inefficiency of ventilation will cause an increase in the concentration of contaminants, and the traffic inside the tunnel will increase. This caused problems.

[Purpose of the invention]

The present invention has been made to overcome the drawbacks of the above-mentioned prior art, and has strong adaptability to changes in ventilation conditions in tunnels due to fluctuations in traffic ventilation force and natural ventilation force, and enables efficient ventilation control. The purpose of this invention is to provide a tunnel ventilation control device that makes it possible to control tunnel ventilation.

[Summary of the invention]

In order to achieve the above object, the present invention calculates the traffic ventilation force and the natural ventilation force based on data regarding the wind direction and wind speed in the tunnel, and determines the optimal operating direction of the ventilation fan based on the calculation results. The present invention provides a tunnel ventilation control device that provides a tunnel ventilation control system.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1 to 3 of the accompanying drawings. FIG. 1 is a block diagram of the same embodiment. The difference from the conventional device shown in FIG. 4 is that a wind direction and speed meter 40 is provided in the tunnel 2, and a control computer 10 has a built-in wind direction and speed data smoothing program 15. This wind direction/wind speed data smoothing program 15 is for smoothing the wind direction/wind speed data from the wind direction/anemometer 40 and removing its short-period fluctuation components.

Next, with reference to the time chart of FIG. 2, the operations of the ventilation direction determination program and the wind direction/wind speed data smoothing program will be explained. Wind direction anemometer 40
Although the output data of contains short-period fluctuation components,
The data is smoothed by passing it through the wind direction and wind speed data smoothing program 15, for example, the curve a in FIG.
become that way. Note that the average times t ₁ and t ₂ in Figure 2
is the time for re-averaging the wind direction and wind speed values shown by curve a for the determination time.

The operating direction of the jet fans 30, 31 is determined according to the wind direction determination result of the previous cycle. That is, when the wind direction is determined to be positive in the immediately preceding control cycle, the jet fans 30 and 31 are operated in the forward direction, and when it is determined to be reversed in the immediately preceding control cycle, the jet fans 30 and 31 are operated in the opposite direction. .
In this way, forward rotation output and reverse rotation output as shown in FIG. 2 are performed.

In addition, the determination of the ventilation air volume, that is, the number of operating jet fans 30, 31, etc.
Based on the pollution data obtained from 21, the pollution data smoothing program 11 and the ventilation airflow rate determination program 12 are used.

FIG. 3 is a flowchart illustrating the procedure for determining the ventilation direction. First, the wind direction and speed data smoothing program 15 monitors the time (step 101), and when the data input time comes, the wind direction and speed data smoothing program 15
Input wind direction and wind speed data (analog values) from (step 102). Next, the input wind direction and wind speed data is smoothed (step 103), and after a delay (step 104) to periodically execute a series of processes,
It is determined whether the control cycle shown in FIG. 2 has been reached (step 105). The above-mentioned smoothing process is continued until the control cycle is reached, and when the control cycle is reached, the average time shown in FIG. 2 is averaged to calculate the wind direction and wind speed determination value (step 106).

Next, a correction is made to remove influences other than traffic ventilation force and natural ventilation force from this wind direction/speed determination value (step 107), and the wind direction in the tunnel in the immediately preceding control cycle is determined (step 108). As a result of the determination, if the wind direction in the tunnel in the previous control cycle is in the positive direction, the jet fans 30 and 31 are rotated in the positive direction (step 109), and if the wind direction is in the opposite direction, they are rotated in the opposite direction (step 109).
110).

In addition, as a substitute for the wind speed and direction data from the anemometer, the switching level and wind direction are determined based on the difference in pollution data measured by VI meters installed at both entrances of the tunnel, and the tunnel is operated in the optimal mode. You may also do so. Furthermore, the ventilation fan is not limited to a jet fan, and may be of any type. Furthermore, wind direction and speed meters, etc. may be provided at two or more locations.

〔Effect of the invention〕

As described above, in the present invention, for example, a wind speed and direction meter is installed in the tunnel, traffic ventilation force and natural ventilation force are calculated based on the output data thereof, and the optimal operating direction of the ventilation fan is determined based on the calculation results. With this configuration, it is possible to obtain a tunnel ventilation control device that has a strong ability to respond to changes in the ventilation condition in the tunnel due to fluctuations in traffic ventilation force and natural ventilation force, and that can perform efficient ventilation control. can.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention, and FIG.
The figure is a timing chart explaining the operation of the embodiment shown in Fig. 1, Fig. 3 is a float chart explaining the procedure for determining the ventilation direction in the embodiment shown in Fig. 1, and Fig. 4 is a block diagram of an example of a conventional device. It is. 10... Control computer, 20, 21... VI meter,
30, 31...Jet fan, 40...Wind direction and speed meter.

Claims (1)

[Scope of Claims] 1. Tunnel ventilation using a longitudinal ventilation method, which controls the operation of a ventilation fan provided in the tunnel so that the output of a sensor that measures the degree of atmospheric pollution in the tunnel is equal to or less than a predetermined value. The control device includes a wind direction and wind speed measuring means for measuring the wind direction and wind speed in the tunnel, and a traffic ventilation force and natural wind speed in the tunnel based on the wind direction and wind speed data obtained by smoothing the output data of the wind direction and wind speed measuring means. Tunnel ventilation characterized by comprising: a first calculation means for calculating ventilation force; and a second calculation means for determining the optimum operating direction of the ventilation fan based on the calculation result of the first calculation means. Control device.