Six Types of Security Surveillance Cameras
At present, there are many kinds of surveillance cameras in the market, but many people probably don't know them yet.
1. Night vision
In fact, the application of night vision uses infrared sensing technology. For example, the car night vision system mainly uses thermal imaging technology, also known as infrared imaging technology. The principle is that any object emits heat, and objects at different temperatures emit different heat. Compared with the surrounding environment, humans, animals and moving vehicles emit more heat. Night vision system can collect this information, and then transform it into visible images, so as to clearly present the objects that could not be seen at night, and increase the safety of driving at night.
2. Waterproof
Waterproof cameras are generally installed in the open air, for example, a vehicle-mounted tail section is installed to form a rear-view system. Some fuzzy situations will be mistaken for water inflow to affect the performance after being used for a long time. Generally, there are several situations when the camera becomes blurred, one is under the condition of high and low temperature aging of plastic lenses. The plastic lens becomes blurred due to aging. Secondly, there is water vapor in the camera, and the glue filling is not good. Thirdly, there is dust on the camera surface.
The protection level adopts the IP×× level standard recommended by the International Electrotechnical Commission (IEC). Different installation places have different levels. Specific can be selected with reference to the following description. In the grade standard, "××" is a two-digit number, the first digit indicates the protection grade for solids, and the second digit indicates the protection grade for liquids. There are 7 levels of solid protection, which are respectively represented by 0-6. There are 9 levels of liquid protection, which are represented by 0-8 respectively. Attached below is the waterproof and dustproof rating table.
Waterproof grade
0: no protection.
1: Dropping water into the shell has no effect.
2: When the shell inclines to 15 degrees, the dripping of water drops into the shell has no effect.
3: Water or rainwater has no influence from the 60-degree corner to the shell.
4: The liquid spilled into the shell from any direction has no harmful effect.
5: Rinse with water without any harm.
6: Can be used in the cabin environment.
7: It can resist flooding in a short time.
8: Soak for a long time under a certain pressure.
Dustproof grade
0: no protection.
1. Prevent large solid intrusion!
2. Prevent medium-sized solids from invading.
3. Prevent small solids from entering and invading.
4: Prevent solids with objects larger than 1mm from entering.
5. Prevent harmful dust accumulation.
6: Completely prevent dust from entering.
3. Network
The network camera is a new generation product that combines traditional camera with network video technology. In addition to having all the image capturing functions of conventional cameras, the latest network camera has built-in digital compression controller and WEB-based operating system, which makes the video data compressed and encrypted and sent to end users via LAN, internet or wireless network. Generally, it is difficult for outsiders in the market to distinguish between a monitor and a webcam. In fact, it can be said that the webcam is also a kind of monitor, but the webcam adds the function of combining with the Internet on the traditional monitor.
4. Numbers
Digital camera refers to the video image acquisition equipment that can be stably and efficiently applied to the carrier site, and can directly store the image on the hard disk. Like the popular integrated camera sold on the Internet at present, it directly stores the image on the SD card. Compared with ordinary cameras, digital camera has high comparability in resolution, frame rate, light requirement and exposure mode, among which the main component is CCD photosensitive core.
5. Infrared
Infrared cameras mainly realize day-night conversion through infrared filters, that is, open the filters during the day to block infrared rays from entering CCD, so that CCD can only sense visible light. When the night vision or illumination conditions are not good, the filter stops working, and no longer blocks the infrared rays from entering the CCD. The infrared rays are reflected by objects and then enter the lens for imaging. The power supply of the infrared camera is low, and the infrared rays used are two kinds: near infrared rays or short-wave infrared rays, with a wavelength of 0.76 ~ 1.5 microns and penetrating deeply into human tissues, about 5 ~ 10 mm; Far infrared rays, or long-wave infrared rays, with a wavelength of 1.5 ~ 400 microns, are mostly absorbed by surface skin, and their penetration depth into tissues is less than 2 mm. Enhance night image capture capability. It should be added here that infrared rays are invisible to the naked eye, and you usually see the red light appearing on the camera, which is a photosensitive resistor.
6. Explosion protection
Explosion-proof camera belongs to explosion-proof monitoring products, which is the cross product of explosion-proof industry and monitoring industry. Because conventional camera products cannot be used in high-risk flammable and explosive sites, products with explosion-proof function and relevant certificates issued by national authorities are needed to be regarded as explosion-proof cameras. Many readers can't distinguish between explosion-proof and riot-proof, and even apply riot-proof products to high-risk areas of flammability, which has a high risk factor, and even causes explosion to cause serious losses to people and property. Anti-riot is anti-violence, anti-destruction, or anti-strike, etc. These products have a relatively hard shell, but do not have explosion-proof electrical performance and certification, which are two completely different products.
1. Night vision
In fact, the application of night vision uses infrared sensing technology. For example, the car night vision system mainly uses thermal imaging technology, also known as infrared imaging technology. The principle is that any object emits heat, and objects at different temperatures emit different heat. Compared with the surrounding environment, humans, animals and moving vehicles emit more heat. Night vision system can collect this information, and then transform it into visible images, so as to clearly present the objects that could not be seen at night, and increase the safety of driving at night.
2. Waterproof
Waterproof cameras are generally installed in the open air, for example, a vehicle-mounted tail section is installed to form a rear-view system. Some fuzzy situations will be mistaken for water inflow to affect the performance after being used for a long time. Generally, there are several situations when the camera becomes blurred, one is under the condition of high and low temperature aging of plastic lenses. The plastic lens becomes blurred due to aging. Secondly, there is water vapor in the camera, and the glue filling is not good. Thirdly, there is dust on the camera surface.
The protection level adopts the IP×× level standard recommended by the International Electrotechnical Commission (IEC). Different installation places have different levels. Specific can be selected with reference to the following description. In the grade standard, "××" is a two-digit number, the first digit indicates the protection grade for solids, and the second digit indicates the protection grade for liquids. There are 7 levels of solid protection, which are respectively represented by 0-6. There are 9 levels of liquid protection, which are represented by 0-8 respectively. Attached below is the waterproof and dustproof rating table.
Waterproof grade
0: no protection.
1: Dropping water into the shell has no effect.
2: When the shell inclines to 15 degrees, the dripping of water drops into the shell has no effect.
3: Water or rainwater has no influence from the 60-degree corner to the shell.
4: The liquid spilled into the shell from any direction has no harmful effect.
5: Rinse with water without any harm.
6: Can be used in the cabin environment.
7: It can resist flooding in a short time.
8: Soak for a long time under a certain pressure.
Dustproof grade
0: no protection.
1. Prevent large solid intrusion!
2. Prevent medium-sized solids from invading.
3. Prevent small solids from entering and invading.
4: Prevent solids with objects larger than 1mm from entering.
5. Prevent harmful dust accumulation.
6: Completely prevent dust from entering.
3. Network
The network camera is a new generation product that combines traditional camera with network video technology. In addition to having all the image capturing functions of conventional cameras, the latest network camera has built-in digital compression controller and WEB-based operating system, which makes the video data compressed and encrypted and sent to end users via LAN, internet or wireless network. Generally, it is difficult for outsiders in the market to distinguish between a monitor and a webcam. In fact, it can be said that the webcam is also a kind of monitor, but the webcam adds the function of combining with the Internet on the traditional monitor.
4. Numbers
Digital camera refers to the video image acquisition equipment that can be stably and efficiently applied to the carrier site, and can directly store the image on the hard disk. Like the popular integrated camera sold on the Internet at present, it directly stores the image on the SD card. Compared with ordinary cameras, digital camera has high comparability in resolution, frame rate, light requirement and exposure mode, among which the main component is CCD photosensitive core.
5. Infrared
Infrared cameras mainly realize day-night conversion through infrared filters, that is, open the filters during the day to block infrared rays from entering CCD, so that CCD can only sense visible light. When the night vision or illumination conditions are not good, the filter stops working, and no longer blocks the infrared rays from entering the CCD. The infrared rays are reflected by objects and then enter the lens for imaging. The power supply of the infrared camera is low, and the infrared rays used are two kinds: near infrared rays or short-wave infrared rays, with a wavelength of 0.76 ~ 1.5 microns and penetrating deeply into human tissues, about 5 ~ 10 mm; Far infrared rays, or long-wave infrared rays, with a wavelength of 1.5 ~ 400 microns, are mostly absorbed by surface skin, and their penetration depth into tissues is less than 2 mm. Enhance night image capture capability. It should be added here that infrared rays are invisible to the naked eye, and you usually see the red light appearing on the camera, which is a photosensitive resistor.
6. Explosion protection
Explosion-proof camera belongs to explosion-proof monitoring products, which is the cross product of explosion-proof industry and monitoring industry. Because conventional camera products cannot be used in high-risk flammable and explosive sites, products with explosion-proof function and relevant certificates issued by national authorities are needed to be regarded as explosion-proof cameras. Many readers can't distinguish between explosion-proof and riot-proof, and even apply riot-proof products to high-risk areas of flammability, which has a high risk factor, and even causes explosion to cause serious losses to people and property. Anti-riot is anti-violence, anti-destruction, or anti-strike, etc. These products have a relatively hard shell, but do not have explosion-proof electrical performance and certification, which are two completely different products.