Fume detection and ventilation device for road tunnel

Abstract

A fume detection and ventilation device for a road tunnel comprises photoelectric sensors (1) mounted in multiple points in the tunnel, and further comprises a band-pass filtering circuit (2), an amplifying circuit (3), an AD converting circuit (4) and a singlechip (5) which are sequentially connected, wherein the singlechip is also respectively connected with a control motor output circuit (6), a sound and light alarm circuit (7) and a prewarning display circuit (8); the photoelectric sensors are used for detecting fume concentration of the air in the tunnel;the band-pass filtering circuit is used for performing de-noising and interference removing for fume concentration detection electrical signals, so as to obtain filtering signals; the amplifying circuit is used for amplifying the filtering signals to obtain simulation signals; the AD converting circuit is used for converting the simulation signals into digital signals; the singlechip is used for analysis and processing of received digital signals so as to realize comparing with a fume concentration set value; and when the fume concentration measured value exceeds a set value, the singlechip respectively starts a tunnel blower and the sound and light alarm through the control motor output circuit, the sound and light alarm circuit and the prewarning display circuit, and prewarning information is displayed on a lattice screen.

Description

technical field [0001] The invention relates to a road tunnel smoke detection and ventilation device. Background technique [0002] In recent years, with the rapid development of highway transportation, a large number of highway tunnels have been widely used. While highway tunnels make great contributions to the national economy, the safety issues of their operation are becoming more and more prominent. Excessive smoke and dust concentration in the tunnel often induces serious traffic accidents, and frequent traffic accidents will cause great loss of life and / or property to the society and individuals. How to effectively prevent traffic accidents in highway tunnels has become an urgent problem for tunnel builders and operators. [0003] The reason for the formation of smoke and dust in the highway tunnel is that there is accumulated water and dust in the highway tunnel. When the temperature rises, the water in the road area evaporates when it is heated, and after the air a...

AI Technical Summary

Problems solved by technology

Especially in the humid climate in the south, the temperature difference between the inside and outside of the road tunnel is large, and the large amount of vehicle exhaust emissions increases the concentration of smoke and dust in the road tunnel, reducing the visibility of drivers and passengers, which can easily lead to traffic accidents

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