Infrared cameras have outstanding advantages such as long-range night vision, strong concealment, and stable performance in surveillance cameras, thus occupying most of the market in night-vision surveillance. How to identify the advantages and disadvantages of the infrared hemisphere camera market? A good performance IR dome camera must have the following capabilities:
Infrared lamp operating conditions In general, the infrared lamp radiated power is proportional to the forward operating current, but near the maximum rated current of the forward current, the temperature of the device rises due to the current heat loss, which causes the light emission power to drop. Infrared diode current is too small, it will affect the radiated power to play, but the operating current is too large will affect its life, and even make the infrared diode burned. When the voltage crosses the positive threshold voltage (about 0.8V or so), the current begins to flow, and it is a very steep curve, indicating that its operating current requirements are very sensitive. Therefore, it is required that the operating current is accurate and stable, otherwise it will affect the performance and reliability of the radiation power. The increase in radiated power with the ambient temperature (increased ambient temperature due to its own heat generation) will reduce its radiated power. Infrared lamps are particularly long-range infrared lamps. Heat consumption is a problem that should be considered when designing and selecting.
Therefore, the use of infrared lamps must have a good constant current power supply and a good heat dissipation design. Middle Road Communications' zoom MCD, MDD, MED, and MBB series cameras have installed high-power infrared lamps (up to 24) and are powered by a high-power constant-current power supply. The internal circulation heat dissipation design enables them to reach remote nights. According to the effect (up to 220 meters) and the long life of the infrared lamp.
Infrared light utilization and red storm problems What is a red storm? Redstorm is due to the fact that the emitted infrared light contains visible light components.
Infrared lamps can be completely red-free (using 940-950nm wavelength infrared tube) or only a weak red storm. Middle Road Communications adopts AUCSITER infrared technology to reduce the infrared lamp's own heat consumption and to adjust the infrared light angle to ensure that the infrared lamp's effective utilization rate reaches 90%. In the selection of infrared lamps, infrared light with a relatively large wavelength (910 nm) was selected, and red storms were strictly reduced to achieve a reddish effect.
Fogging and Frosting of Infrared Cameras The formation of fog and frost is caused by the condensation of saturated steam in the air, and is condensed into frost and fog due to the strong or weak cold environment. In the work process of infrared cameras, especially outdoor cameras often cause fog or frost on the protective window glass due to seasonal changes, temperature difference between day and night, and rain and snow conditions. As a result, cameras cannot see objects and directly affect the monitoring results. Midway Communications adopted the advanced electronic defrosting circuit to effectively control the saturated water vapor concentration in the cavity and achieved automatic defogging and defrosting.
Infrared camera window glass cleaning Infrared dome camera works in rainy, snowy or dusty environments, and the window glass of the protective cover is prone to dirt, causing the camera to block the line of sight. The solution is usually to add a wiper to the hood, and to control the wiper to clean the glass; another option is to use an invisible wiper window glass. Compared with ordinary window glass, invisible wiper window glass has the function of repelling water, dust, and snow.
The constant temperature of the infrared camera is configured with infrared lamps that generate a large amount of heat. After the infrared lamp is started, heat will be concentrated in the front of the infrared dome camera during the entire working period (in 12 hours), that is, the front temperature in the cavity is high. If it cannot be evenly distributed, it will affect the normal operation of the camera and other components. Middle Road Communications Co., Ltd. has solved this problem by designing and using an automatic air-conditioning system with forced cooling and cooling. Automatic cooling and air conditioning using Peltier effect principle, temperature measurement control circuit can be automatically adjusted, the temperature inside the shield is constant within the normal operating temperature range of the camera, the factory set the temperature within the cover below +5 °C heating, +40 °C above cooling. Experiments show that the infrared hemisphere camera can work normally in an outdoor natural environment of -40°C to +70°C (direct sunlight).
In addition to the infrared camera closed in addition to the constant temperature, the use of automatic air conditioning Another advantage is that the infrared camera can be made fully enclosed, without leaving any cooling holes, to prevent the entry of dust, moisture, corrosive gases, so that it can adapt to dust Large and harsh environments, such as large coal mines, can also be used normally.
Infrared camera integrated infrared camera, there is a dome-type infrared one machine, fast ball-type infrared one machine, combined with the PTZ infrared integrated camera and lens built-in infrared one machine.
Compared with traditional cameras, the infrared one-piece machine is compact and beautiful. It has advantages in installation and is relatively convenient. Its power supply, video and control signals all have direct sockets, which is not like the troublesome connection of traditional cameras. All-in-one imaging system (lens), CCD, and DSP technology patents have been mastered by internationally renowned manufacturers. Compared to traditional cameras, the quality of all-in-one cameras can be well controlled. At the same time, integrated cameras have a wide range of monitoring and cost-effectiveness. The traditional camera positioning system is not flexible enough and requires manual focusing. The biggest advantage of the integrated camera is that it has an auto-focus function.
Can achieve good waterproof function is also one of the features of the infrared integrated camera, the integrated camera outdoor type has a waterproof function, and the traditional camera must be used in conjunction with the head, protective cover to achieve waterproof function. There are now more submersible integrated cameras developed specifically for underwater operations.
In addition, the infrared light integrated with the infrared integrated camera can automatically turn on when the illumination is lower than a certain value or even at night so as to achieve a stable imaging effect.
Infrared cameras are mostly used in government projects, high-end high-rise buildings, and shopping malls, schools, hotels, and hotel lobbies. There are also dust-proof and low-temperature, non-sparking motors that are especially suitable for places with high environmental requirements such as hospital operating rooms. Explosion-proof products. Other professional integrated cameras, such as military, aviation, polar, seabed, and biochemical environments, have different special functions such as anti-high pressure, anti-corrosion, anti-vibration, etc. because of their different uses.
Infrared lamp operating conditions In general, the infrared lamp radiated power is proportional to the forward operating current, but near the maximum rated current of the forward current, the temperature of the device rises due to the current heat loss, which causes the light emission power to drop. Infrared diode current is too small, it will affect the radiated power to play, but the operating current is too large will affect its life, and even make the infrared diode burned. When the voltage crosses the positive threshold voltage (about 0.8V or so), the current begins to flow, and it is a very steep curve, indicating that its operating current requirements are very sensitive. Therefore, it is required that the operating current is accurate and stable, otherwise it will affect the performance and reliability of the radiation power. The increase in radiated power with the ambient temperature (increased ambient temperature due to its own heat generation) will reduce its radiated power. Infrared lamps are particularly long-range infrared lamps. Heat consumption is a problem that should be considered when designing and selecting.
Therefore, the use of infrared lamps must have a good constant current power supply and a good heat dissipation design. Middle Road Communications' zoom MCD, MDD, MED, and MBB series cameras have installed high-power infrared lamps (up to 24) and are powered by a high-power constant-current power supply. The internal circulation heat dissipation design enables them to reach remote nights. According to the effect (up to 220 meters) and the long life of the infrared lamp.
Infrared light utilization and red storm problems What is a red storm? Redstorm is due to the fact that the emitted infrared light contains visible light components.
Infrared lamps can be completely red-free (using 940-950nm wavelength infrared tube) or only a weak red storm. Middle Road Communications adopts AUCSITER infrared technology to reduce the infrared lamp's own heat consumption and to adjust the infrared light angle to ensure that the infrared lamp's effective utilization rate reaches 90%. In the selection of infrared lamps, infrared light with a relatively large wavelength (910 nm) was selected, and red storms were strictly reduced to achieve a reddish effect.
Fogging and Frosting of Infrared Cameras The formation of fog and frost is caused by the condensation of saturated steam in the air, and is condensed into frost and fog due to the strong or weak cold environment. In the work process of infrared cameras, especially outdoor cameras often cause fog or frost on the protective window glass due to seasonal changes, temperature difference between day and night, and rain and snow conditions. As a result, cameras cannot see objects and directly affect the monitoring results. Midway Communications adopted the advanced electronic defrosting circuit to effectively control the saturated water vapor concentration in the cavity and achieved automatic defogging and defrosting.
Infrared camera window glass cleaning Infrared dome camera works in rainy, snowy or dusty environments, and the window glass of the protective cover is prone to dirt, causing the camera to block the line of sight. The solution is usually to add a wiper to the hood, and to control the wiper to clean the glass; another option is to use an invisible wiper window glass. Compared with ordinary window glass, invisible wiper window glass has the function of repelling water, dust, and snow.
The constant temperature of the infrared camera is configured with infrared lamps that generate a large amount of heat. After the infrared lamp is started, heat will be concentrated in the front of the infrared dome camera during the entire working period (in 12 hours), that is, the front temperature in the cavity is high. If it cannot be evenly distributed, it will affect the normal operation of the camera and other components. Middle Road Communications Co., Ltd. has solved this problem by designing and using an automatic air-conditioning system with forced cooling and cooling. Automatic cooling and air conditioning using Peltier effect principle, temperature measurement control circuit can be automatically adjusted, the temperature inside the shield is constant within the normal operating temperature range of the camera, the factory set the temperature within the cover below +5 °C heating, +40 °C above cooling. Experiments show that the infrared hemisphere camera can work normally in an outdoor natural environment of -40°C to +70°C (direct sunlight).
In addition to the infrared camera closed in addition to the constant temperature, the use of automatic air conditioning Another advantage is that the infrared camera can be made fully enclosed, without leaving any cooling holes, to prevent the entry of dust, moisture, corrosive gases, so that it can adapt to dust Large and harsh environments, such as large coal mines, can also be used normally.
Infrared camera integrated infrared camera, there is a dome-type infrared one machine, fast ball-type infrared one machine, combined with the PTZ infrared integrated camera and lens built-in infrared one machine.
Compared with traditional cameras, the infrared one-piece machine is compact and beautiful. It has advantages in installation and is relatively convenient. Its power supply, video and control signals all have direct sockets, which is not like the troublesome connection of traditional cameras. All-in-one imaging system (lens), CCD, and DSP technology patents have been mastered by internationally renowned manufacturers. Compared to traditional cameras, the quality of all-in-one cameras can be well controlled. At the same time, integrated cameras have a wide range of monitoring and cost-effectiveness. The traditional camera positioning system is not flexible enough and requires manual focusing. The biggest advantage of the integrated camera is that it has an auto-focus function.
Can achieve good waterproof function is also one of the features of the infrared integrated camera, the integrated camera outdoor type has a waterproof function, and the traditional camera must be used in conjunction with the head, protective cover to achieve waterproof function. There are now more submersible integrated cameras developed specifically for underwater operations.
In addition, the infrared light integrated with the infrared integrated camera can automatically turn on when the illumination is lower than a certain value or even at night so as to achieve a stable imaging effect.
Infrared cameras are mostly used in government projects, high-end high-rise buildings, and shopping malls, schools, hotels, and hotel lobbies. There are also dust-proof and low-temperature, non-sparking motors that are especially suitable for places with high environmental requirements such as hospital operating rooms. Explosion-proof products. Other professional integrated cameras, such as military, aviation, polar, seabed, and biochemical environments, have different special functions such as anti-high pressure, anti-corrosion, anti-vibration, etc. because of their different uses.