As is known to all, as the photoelectric information, microelectronics, network communications, digital video, multimedia technology and the development of sensor technology, security monitoring technology is also from traditional analog to digital, intelligent, highly integrated network. With the increase of market demand, in the modern high-tech security monitoring system in almost all have application or the application. The light and infrared thermal imaging technology has been applied in the safety and protection system.
LLL night vision monitoring technology is a power vacuum and electronic technology, such as optical photons - electronic image - image visual video image transformation, in the process of transformation, through to the electronic image enhancement technique, to achieve the visual image enhancement, thus in the faint light a night vision technology. Its advantage is visual distance is far, shortcomings in the absence of light can't see clear object, namely the relative infrared technology, it still needs to be in a certain light, that is afraid of the environment, with a light to the scene of the surveillance images.
And thermal imaging technology is a kind of passive infrared night vision technology, ordinary infrared monitoring technology is active infrared night vision technology, thermal imaging technology is to use natural objects to form the image of the different parts of the infrared radiation intensity, it according to the target and the background or target temperature or thermal radiation difference between the parts to find the target. With the technology changes over the surrounding light conditions, so can the night during the day, even the fog, rain and other bad environment to provide video images. But it can't realize the long-distance monitoring and surveillance images only judging whether there is a suspicious personnel to enter, and can't see clear face and appearance.
Ordinary infrared camera is a kind of active infrared technology, is through active infrared launch, to which target reflection infrared camera surveillance of a night vision technology, with the application of the third generation of infrared array technology, active infrared monitoring has been very good ascension, the effect of product quality, better service life, and the manufacturing technical requirements is not high, low cost, it has a broad application prospect.
LLL night vision and thermal imaging technology in the practical application of some similar, the two technologies of camera is mainly used in the night and concealment of equipment requires some special monitoring places, such as military, police and drug anti-smuggling, defending, etc., in this kind of monitoring place the two devices are very appropriate. Heaven and earth weiye Ma Kewei said the LLL night vision camera is to weak light generated by the electronic image enhancement to can realize effective surveillance video images, to the scene to monitor. And thermal imaging technology is the use of temperature above absolute zero (273 ℃) or more objects can work on the principle of the infrared radiation, for a variety of object infrared radiation intensity is different, so that all people, animals, objects can be observed clearly, and not affected by obstacles such as smoke, fog, and grass, can work day and night. Now often say the infrared cameras are active infrared, which is the use of infrared beam fill light, illuminate the target is not restricted, can also be used under the condition of all black, the effect is good and the price is appropriate, but fill light distance is limited, concealment is not strong, vulnerable to the influence of factors such as weather, and all kinds of target for infrared reflection effect have bigger difference, these will affect the image quality.
For now, the infrared thermal imaging technology than the low light level imaging technology, more widely used in security large vertical market manager Xue Sheng month analysis and application of the infrared thermal imaging has done the following simple sums.
1, night and bad weather conditions
On the night of opaque, monitoring equipment based on visible light cannot work normally, if by means of artificial lighting, is easy to expose the target. If the LLL night vision equipment, it also work in the visible band, faint light still need to the outside world. And infrared thermal imager is passive to accept target their infrared radiation, no matter day and night all can work normally, and don't expose themselves. Even in bad weather conditions, such as rain, fog, due to the wavelength of visible light, the ability to overcome obstacles, thus observed effect is poor, but the infrared wavelength is longer, especially work in 8 ~ 14 um of thermal imager, through the rain, fog, ability is higher, so can still be observed. So at night, especially in the harsh climate conditions, the use of infrared thermal imaging monitoring equipment on various targets, such as staff, vehicles and other monitoring.
2, fire monitoring
Because the infrared thermal imager is reflecting surface temperature and imaging equipment, so in addition to night can be used as the site monitoring, also can be used as an effective fire detection equipment. Application of infrared thermal imager can quickly and efficiently find these hidden fire, and it can accurately determine the location of the fire and scope, through discovery of ignition, smoke do early know early prevention, early to put out.
3, camouflage and concealment of target recognition
Ordinary camouflage is visible in case observation. General criminals commit crime is usually hidden in the grass and woods, as a result of the outdoor environment and bad people visual illusion, prone to error judgment. Infrared thermal imaging device is a passive accept target their thermal radiation, the human body and the vehicle's temperature and infrared radiation is generally greater than the vegetation temperature and infrared radiation, so the target is not easy to pretend, also not easy to be wrong judgment.
4, the application of infrared thermal imaging inspection and quarantine
In recent years, the airport aviation business development is very rapid, entry-exit passengers up to thousands of people a day, the entry and exit airports, ports and personnel flow is big, busy and crowded, complicated, and the matching of entry and exit inspection and quarantine work task is very heavy. At the same time, in recent years, the outbreak of infectious diseases such as SARS, bird flu epidemic and endemic, the traditional inspection and quarantine work is facing more and more severe challenges. In order to ensure the safety of the new situation of entry and exit passenger smooth customs clearance, need to adopt innovative thinking and innovative means to use the infrared temperature monitoring system of high degree of automation is good technology choices.
