A lens dust removal protection device based on the two-way Coanda effect

Abstract

The invention provides a lens dust-removal protection device based on bidirectional Coanda effect. The device comprises a gas inlet, a lens fixing device, an air guide device and a dust-detecting protective lens. The high-pressure gas is injected into an indent stepped annular cavity formed by the lens fixing device and the air guide device through the gas inlet, enters a Coanda profile to generate the Coanda effect after being secondary compressed and triggers the air from air guide ports of two sides to flow along the lens surface in high speed orientally, and the purposes of removing dust through gas and protecting the lens can be realized accordingly; by the aid of the dust-detecting protective lens, the lens can be protected, a square ruler capable of measuring dust density is provided, and the device is particularly adaptive to lenses with visual analyzing functions for self dust removal. According to the device, the arc gas outlet forms the Coanda profile capable of triggering gas Coanda effect to play an air amplifier role by 25 time mostly; compressed air can be saved greatly by 90% mostly.

Description

technical field [0001] The invention relates to a cleaning device, in particular to a lens cleaning protection device. Background technique [0002] In recent years, with the rapid development of visual monitoring, various functional camera lenses have been widely used in various fields of society, such as traffic warning and monitoring, security and aerospace, robot intelligence and so on. Due to its complex working environment, especially in the application of traffic monitoring and mobile robot vision systems, the camera will be directly exposed to harsh outdoor conditions, and it needs to withstand sand, dust and fog for a long time. This has caused dust and moisture to adhere to the surface of the lens, which seriously interferes with the normal operation of the camera. At the same time, due to its working conditions, regular maintenance and cleaning cannot be achieved. Therefore, how to automatically detect lens contamination and quickly clean it has become an urgent ...

AI Technical Summary

Problems solved by technology

[0005] 1. The performance of the transparent protective device is not perfect. Although a protective layer is directly added to the lens and the outside world, the cover itself will still be polluted, resulting in blurred vision of the lens and affecting normal use

[0006] 2. At present, most of the lens cleaning measures are to remove the contaminated lens and then clean it. The methods are mostly water washing, ultrasonic cleaning, high-pressure gas washing, etc., which cannot be cleaned online, and most of them are manual operations with low efficiency, which affects the normal operation of the lens. Work

[0007] 3. After reviewing relevant patents, the lens cleaning device based on the Coanda effect has the problems of poor single-hole air supply and low gas utilization. The gas amplification effect is not ideal, the dust removal efficiency is low, and the cleaning effect is affected

[0008] 4. Poor self-cleaning performance, mostly manual cleaning, a few patents based on visual sensors, do not have the function of automatic detection of dust density and feedback of pollution degree, poor self-cleaning ability

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