Method and device for positioning fire monitor based on image recognition

Abstract

The invention discloses a method and device for positioning a fire monitor based on image recognition. The method for positioning the fire monitor comprises the following steps that the adjustment angle of a monitor barrel in the horizontal direction is determined, wherein a processing unit analyzes and processes an image and marks the center of the zone of a fire source on the image, and the included angle formed between the monitor barrel and the position of the center of the zone of the flame relative to the center of the image is the adjustment angle of the monitor barrel in the horizontal direction; the adjustment angle of the monitor barrel in the perpendicular direction is determined, wherein the orientation angle of the monitor barrel and the water falling point position of the fire monitor are determined according to the center, marked on the image, of the zone of the fire source, and the elevation angle of the fire monitor is obtained by correcting the monitor barrel with the combination of the installation height and the jet speed of the fire monitor and is the adjustment angle of the fire monitor in the perpendicular direction. According to the method and device for positioning the fire monitor, a wide-angle pick-up lens is used for being combined with a sensor to form a wide-angle flame detector, the detection range of the wide-angle lens is wide, and flame targets within the 360 degrees by using the fire monitor as the center can be detected.

Description

technical field [0001] The invention belongs to the technical field of fire monitors, and in particular relates to an image recognition-based positioning method and device for fire monitors. Background technique [0002] Fire monitors play a very important role in the field of fire protection in large spaces due to their large jet flow and concentrated spraying of fire extinguishing agents. In the case of relatively complex environment and space, accurate and fast fire location is the key to fire monitor control. At present, the scanning positioning technology of infrared and ultraviolet sensors and the secondary positioning technology of image sensors are mainly used. [0003] The red-ultraviolet sensor uses the ultraviolet sensor for fire triggering, and uses the infrared sensor for horizontal and vertical scanning positioning after triggering. This technology has the following drawbacks: [0004] 1. During the horizontal scanning process, the strength of the signal rep...

AI Technical Summary

Problems solved by technology

[0004] 1. During the horizontal scanning process, the strength of the signal represents the integral value in the vertical direction, which cannot represent the specific strength and shape of the ignition point

Therefore, for multiple ignition conditions, it is difficult to accurately determine the sequence of injection positions

[0005] 2. In places where arc welding, halogen lamps, gas discharge tubes, and ultraviolet lamps can emit certain ultraviolet rays, the ultraviolet sensor will be triggered, causing the fire monitor to perform infrared scanning, triggering the fire monitor to extinguish the fire, and misleading the fire monitor.

[0006] 3. For the scanned position point, it is straight-line aiming for the aiming direction of the muzzle of the fire monitor, but the jet trajectory is a parabola, so it is difficult to aim at a fixed point

[0008] 1. Fire detection requires two detection actions, and the positioning response time is slow

[0009] 2. There is the same technical problem as the red-ultraviolet scanning gun defect 3

Although some manufacturers have improved this, such as using the muzzle camera and the detector camera for binocular vision to determine the distance, but due to the difficulty in measuring the distance between the two cameras and installing them accurately as required in the actual installation process, there are many methods stay in the lab

[0010] 3. As the number of detectors increases, the failure rate also increases accordingly, and installation and debugging become more troublesome. Even for some places of use, too many signal connections have become a new fire hazard

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