| 摘要 |
PROBLEM TO BE SOLVED: To obtain a high-speed response at a real time to the variation of the status of vehicular traffic, and to conduct precise ventilation control with higher accuracy by directly reflecting the concentration of contaminants such as smoke, carbon monoxide or the like contained in exhaust gas discharged from a car to ventilation control. SOLUTION: Smoke concentration is detected directly by a smoke detector 4 and the concentration of carbon monoxide is detected directly by a carbon- monoxide detector 10 regarding exhaust gas 100 discharged from a car A at timing detecting the car A by a car detector 3. The ventilation control of sequence control (forward control) to a ventilating device 8 is conducted while using the larger side in the amount of ventilation required QB based on smoke concentration computed by an integrating processing section 6 and the amount of ventilation required QC based on the concentration of carbon monoxide as the final amount of ventilation required Q at that time.
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