CN107734219A - A kind of radiant type defogging method for optical lens - Google Patents

Abstract

The invention relates to a radiation defogging method for an optical lens, which belongs to the monitoring field. At least one group of infrared light sources is set at the surveillance camera or the optical lens of the surveillance camera; a fog intensity sensor is set at the surveillance camera or the optical lens of the surveillance camera to sense the fog intensity at the optical lens; When the fog intensity is higher than the preset value of "Start", the infrared light source outputs infrared radiation, which is projected onto the surveillance camera or the lens or mirror of the surveillance camera; when the fog intensity is lower than the preset value of "Stop", the infrared light source Stop outputting infrared radiation; thereby realizing the function of dispelling fog water. It irradiates the lens with infrared radiation to increase the temperature of the lens or the mirror itself, thereby achieving the defogging effect. The defogging work efficiency is high, the failure rate is low in the actual operation process, and there is no interference to the optical processing process of the monitoring system. It can be widely used in the defogging field of optical lenses of various monitoring devices.

Description

A Radiative Defog Method for Optical Lens

technical field

The invention belongs to the field of monitoring, and in particular relates to a radiation-type defogging method for optical lenses of monitoring cameras.

Background technique

In the on-site monitoring of power lines and power equipment, various monitoring cameras or monitoring cameras are widely used.

Because these surveillance cameras or surveillance cameras are usually set outdoors, the harsh natural environment on site, large natural temperature difference changes, especially the long-term humid climate in the south, make the optical lenses of surveillance cameras or surveillance cameras very easy to fog, which affects observation The effect and monitoring accuracy will affect the completion of the normal monitoring camera function in severe cases.

Finding a low-cost, easy-to-implement defogging method that will not affect the normal camera function of the existing surveillance cameras or surveillance cameras, and does not require major changes to the existing surveillance cameras or surveillance cameras, is an urgent need in the actual work on site. Resolved display issues.

Contents of the invention

The technical problem to be solved by the present invention is to provide a radiation defogging method for an optical lens. It installs an infrared light source in the surveillance camera or the surveillance camera, and irradiates the lens of the surveillance camera or surveillance camera through the infrared light source, so as to increase the temperature of the lens itself and dispel the fog, so as to realize the radiation defogging function of the optical lens .

The technical solution of the present invention is: provide a kind of radiation type defogging method for optical lens, it is characterized in that:

At least one group of infrared light sources is arranged at the surveillance camera or the optical lens of the surveillance camera;

Set a fog intensity sensor at the surveillance camera or the optical lens of the surveillance camera to sense the fog intensity at the optical lens;

When the fog intensity detected by the fog intensity sensor is higher than the "start" preset value, turn on the power of the infrared light source;

The infrared light source outputs infrared radiation, which is projected onto the surveillance camera or the lens or mirror surface of the surveillance camera. The lens or mirror absorbs the light radiation, and its temperature rises, thereby realizing the function of dispelling fog.

Further, the infrared radiation output by the infrared light source is projected onto the surveillance camera or the lens or mirror surface of the surveillance camera after the interference light is filtered out by the filter.

Specifically, the fog intensity sensed by the sensor is used as an automatic adjustment or control parameter for the intensity of the infrared light source.

Specifically, when the working light of the surveillance camera or the lens or mirror of the surveillance camera is visible light, the infrared radiation output by the infrared light source is projected onto the lens or mirror after being filtered, and the infrared radiation spectrum output by the infrared light source does not contain visible light.

Further, the infrared light source adopts electric heating film.

Furthermore, when the fog intensity detected by the fog intensity sensor is lower than the "stop" preset value, the power supply of the infrared light source is cut off; the infrared light source stops outputting infrared radiation.

Compared with prior art, the advantages of the present invention are:

1. Using electrothermal film as the infrared light source, the heating efficiency is high, the system saves power, and it will not bring a large load increase to the existing monitoring system;

2. By irradiating the lens with infrared radiation, the temperature of the lens or the mirror itself rises, thereby achieving the defogging effect. The defogging work efficiency is high, easy to implement, and the failure rate is low in the actual operation process, which is convenient for long-term stable operation;

3. The output of the infrared light source is filtered and then projected onto the surveillance camera or the lens or mirror of the surveillance camera, which does not interfere with the optical processing process of the existing surveillance system, and the functions of the original surveillance system are not affected.

Description of drawings

Fig. 1 is a schematic block diagram of the defogging method of the present invention;

Fig. 2 is a schematic diagram of the system configuration of the mist removal device of the present invention.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings.

In Fig. 1 and Fig. 2, the technical solution of the present invention provides a kind of radiation type defogging method for optical lens, and its invention point is:

At least one group of infrared light sources is arranged at the surveillance camera or the optical lens of the surveillance camera;

Set a fog intensity sensor at the surveillance camera or the optical lens of the surveillance camera to sense the fog intensity at the optical lens;

When the fog intensity detected by the fog intensity sensor is higher than the "start" preset value, turn on the power of the infrared light source;

The infrared light source outputs infrared radiation, which is projected onto the surveillance camera or the lens or mirror surface of the surveillance camera. The lens or mirror absorbs the light radiation, and its temperature rises, thereby realizing the function of dispelling fog.

Further, the infrared radiation output by the infrared light source is projected onto the surveillance camera or the lens or mirror surface of the surveillance camera after the interference light is filtered out by the filter.

Specifically, the fog intensity sensed by the sensor is used as an automatic adjustment or control parameter for the intensity of the infrared light source.

Specifically, when the working light of the surveillance camera or the lens or mirror of the surveillance camera is visible light, the infrared radiation output by the infrared light source is projected onto the lens or mirror after being filtered, and the infrared radiation spectrum output by the infrared light source does not contain visible light.

Further, the infrared light source adopts electric heating film.

Furthermore, when the fog intensity detected by the fog intensity sensor is lower than the "stop" preset value, the power supply of the infrared light source is cut off; the infrared light source stops outputting infrared radiation.

The technical solution of the present invention also provides a radiation type defogging device for an optical lens, and its invention points are:

At the optical lens place of monitoring camera or monitoring camera, at least one group of infrared light sources is set; Functional interference is reduced to a minimum).

A fog intensity sensor is set at the surveillance camera or the optical lens of the surveillance camera to sense the fog intensity at the optical lens; the fog intensity sensor can be a detection sensor with functions such as a moisture content sensor or a humidity sensor.

When the fog intensity detected by the fog intensity sensor is higher than the "start" preset value, turn on the power of the infrared light source;

The infrared light source outputs infrared radiation, which is projected onto the surveillance camera or the lens or mirror surface of the surveillance camera. The lens or mirror absorbs the light radiation, and its temperature rises, so that the fog water attached to the lens or mirror surface is dried or evaporated, thereby achieving dispersal Fog function.

Further, the infrared radiation output by the infrared light source is projected onto the surveillance camera or the lens or mirror surface of the surveillance camera after being filtered out by an optical filter, so as to minimize the interference to the optical function of the existing camera lens.

Specifically, the fog intensity sensed by the sensor is used as an automatic adjustment or control parameter for the intensity of the infrared light source.

Specifically, when the working light of the surveillance camera or the lens or mirror of the surveillance camera is visible light, the infrared radiation output by the infrared light source is projected onto the lens or mirror after being filtered, and the infrared radiation spectrum output by the infrared light source does not contain visible light.

Further, the infrared light source adopts electric heating film.

Furthermore, when the fog intensity detected by the fog intensity sensor is lower than the "stop" preset value, the power supply of the infrared light source is cut off; the infrared light source stops outputting infrared radiation.

The technical solution of the present invention adopts the electric heating film as the infrared light source, which has high heating efficiency, saves power for the system, and will not bring a large load increase to the existing monitoring system; the technical solution makes the lens or mirror surface The self-temperature rises to achieve the effect of defogging. The efficiency of defogging is high, easy to implement, and the failure rate is low in the actual operation process, which is convenient for long-term stable operation. In addition, the output of the infrared light source is projected to the surveillance camera after being filtered. Or the lens or mirror surface of the surveillance camera does not interfere with the optical processing process of the existing surveillance system, and the functions of the original surveillance system are not affected.

The invention can be widely used in the defogging field of optical lenses of various monitoring devices.

Claims (6)

1. A radiation type defogging method for an optical lens, characterized in that: At least one group of infrared light sources is arranged at the surveillance camera or the optical lens of the surveillance camera; Set a fog intensity sensor at the surveillance camera or the optical lens of the surveillance camera to sense the fog intensity at the optical lens; When the fog intensity detected by the fog intensity sensor is higher than the "start" preset value, turn on the power of the infrared light source; The infrared light source outputs infrared radiation, which is projected onto the surveillance camera or the lens or mirror surface of the surveillance camera. The lens or mirror absorbs the light radiation, and its temperature rises, thereby realizing the function of dispelling fog. 2. according to the radiative defogging method for optical lens according to claim 1, it is characterized in that the infrared radiation output by the infrared light source is projected onto the monitoring camera or the monitoring camera after filtering the disturbing light through the optical filter lens or mirror surface. 3. The radiation-type defogging method for an optical lens according to claim 1, wherein the fog intensity sensed by the sensor is used as an automatic adjustment or control parameter for the intensity of the infrared light source. 4. according to the radiation-type demist method for optical lens according to claim 1, it is characterized in that when the working light of the camera lens or the mirror surface of the monitoring camera or the monitoring camera is visible light, the infrared radiation output by the infrared light source passes through the optical filter After being projected onto the lens or mirror, the infrared radiation spectrum output by the infrared light source does not contain visible light. 5. The radiation-type defogging method for an optical lens according to claim 1, wherein said infrared light source adopts an electrothermal film. 6. The radiation-type defogging method for optical lens according to claim 1, characterized in that when the fog intensity detected by the fog intensity sensor is lower than the "stop" preset value, the infrared Power to the light source; the infrared light source stops outputting infrared radiation.