Foam ratio control method and system for compressed air foam system and fire fighting truck

Abstract

The invention relates to the technical field of fire-fighting trucks, and discloses a foam ratio control method and system for a compressed air foam system and a fire-fighting truck. The method comprises the steps of acquiring the current foam ratio of foam output by the compressed air foam system; comparing the current foam ratio with a preset foam ratio, determining the difference value betweenthe current foam ratio and the preset foam ratio, and adjusting the rotating speed of a servo motor of the compressed air foam system based on the difference value; and in the period of adjusting therotating speed of the servo motor of the compressed air foam system, acquiring the current foam ratio of foam output by the compressed air foam system, and executing the adjustment until the current foam ratio conforms to the preset foam ratio. By means of the technical scheme, the rotating speed of the servo motor of the compressed air foam system is adjusted according to accurate foam flow calculation, the foam ratio can be correspondingly and more accurately controlled, and therefore firefighters are promoted to extinguish fire more accurately and rapidly in the fire extinguishing process.

Description

technical field [0001] The invention relates to the technical field of fire trucks, in particular to a foam ratio control method and system used in a compressed air foam system and a fire truck. Background technique [0002] CAFS, also known as compressed air foam system, is a fire-fighting system that injects compressed air into foam and then mixes it with water to form compressed air foam to extinguish fire. It is generally installed on fire trucks or other fire-fighting equipment. When the compressed air foam system outputs foam, air, foam and water are usually mixed in proportion. When facing different fire situations, adjust the motor speed to achieve the best foam ratio to achieve the best fire extinguishing effect. [0003] In the existing technology, firefighters need to output a large amount of foam for fire extinguishing when they start the fire truck. In the process, the foam flow calculation error is large due to the instability of foam detection, and the convent...

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, firefighters need to output a large amount of foam for fire extinguishing when they start the fire truck. In the process, the foam flow calculation error is large due to the instability of foam detection, and the conventional motor itself Speed ​​regulation performance is limited, resulting in inaccurate foam ratio control

In addition, if an emergency fire occurs, if the foam ratio of the foam cannot be precisely controlled, the best fire extinguishing effect cannot be achieved.

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