Haze climate camera common problems and effective solutions
Magnesium Chloride is the name for the chemical compound with the formula MgCl2 and its various hydrates
MgCl2(H2O)x. These salts are typical ionic halides, being highly soluble in water. The hydrated magnesium
chloride can be extracted from brine or sea water. Our magnesium chloride products are made from solar
evaporation of seawater.
Classification:
Chloride
Name
Magnesium Chloride
hexahydrate
CAS No.:
7791-18-6
Grade Standard
Industrial grade
MF
MgCl2(H2O)x
Place of Origin
Shandong China
Appearance
Flakes,pellets,powder,
granular
Purity:
46%
Brand name
Xinchang
Packing
20kg,25kg, or 1000kg bag
· serves as precursor to other magnesium compounds
· used for dust control and road stabilization.
· used for ice control.
·used for the production of magnesium metal.
·used for fertilizer.
·mineral supplement for animals.
·wastewater treatment, wallboard, artificial seawater.
·feed supplement.
·textiles, paper, fireproofing agents.
·cements and refrigeration brine.
·used in fire extinguishers.
·utilized in the polymerase chain reaction(PCR).
Magnesium Chloride Magnesium Chloride,Fertilizer Magnesium Chloride,Bulk Magnesium Chloride,Food Grade Magnesium Chloride Weifang Xinchang Chemical Co.,Ltd , http://www.xinchangchem.com
From the user's psychological point of view, they are the first to care about the clarity of the image, but they are also worried that in the past using a digital mixed system, everyone feels mature and stable, the operation is also handy, it goes to megapixel high-definition How about stability? Is it convenient to use? When a failure occurs, is it easy to deal with it, or is it an engineering integrator to help with it? With the recent smog weather, will the common camera problems be solved quickly in the field? Let's take a look at the installation and debugging of the camera and analysis of common faults.
Infrared camera installations dissect different transmittances and reflectivities of different media. Therefore, different protective cover glasses, especially those with automatic defrosting coating layer, will cause certain attenuation of infrared light. Special attention must be paid to construction.
â—‡ Avoid installing the device in a location where strong light (such as sunlight, lighting, etc.) is present. Otherwise, it may easily cause excessive bright or light (not a malfunction), and it will also affect the life of the CCD.
â—‡ Cameras should be kept away from humid, dusty, extremely hot, cold, and strong electromagnetic radiation.
The infrared lamp has no irradiation distance parameter, only the number of power, which is a very vague concept, because the power consumption is converted into infrared light energy, it also includes power heat loss, circuit heat loss, light source heat loss, filter glass Slice infrared light efficiency and so on. That is, the same power of the infrared projection lamp, the irradiation distance may be very far away;
â—‡ Manufacturers continue to increase, but the factory inspection of related products is not easy, and the conditions of technology, testing equipment and equipment are not all different. Users should make more comparisons, carefully read the operating instructions before installation and pay special attention to the safety of personal equipment. Precautions;
â—‡ Consider the degree of reflection of the scene being photographed. Infrared rays have the same characteristics of reflection and refraction as visible light, so a certain distance margin should be considered when there are no good reflective environments (such as buildings, fences, signs) around the target scene.
â—‡ Optional infrared projection lamps, in addition to its indicator parameters need to consider other. Most of the infrared projection lamps on the market today are in the two bands of 850nm and 940nm, and the selected camera must be able to sense the infrared light of these bands.
Weather conditions such as rain, fog, and dust are all factors that limit the distance that affects the irradiation distance. In addition, the difference in reflectivity between the site environment and the monitoring target will also make the night vision effect very different. Therefore, it must be tested before installation. ;
â—‡ Use electronically controlled switching devices as far as possible, and its fuzzy logic capability can effectively control the operating status of ICR-CUT filters. Because most manufacturers use simple sensors such as photoresistor sensors to control the ICR-CUT filter and the On/Off state of the IR projection lamp, the repeated transition of its critical point is often unsatisfactory.
After the haze, the common problems of the camera may be solved effectively. Take an infrared hemisphere as an example:
One problem: the reason after waterproof and heat dissipation is not ideal <br> <br> with a long time, there will be more or less inside the camera soda (This phenomenon is mainly concentrated in the northern region), this phenomenon is mainly in the The sealing effect of the shell is not enough and the temperature difference is not taken into account when the fashion machine. When the infrared lamp starts to work, it will generate a lot of heat, and at the same time the heat dissipation effect of the shell is not enough, which will greatly reduce the service life of the camera. To solve this problem, the infrared hemisphere camera's shell can be made into a plurality of wire troughs. It is good for heat dissipation.
Problem 2: Infrared dome camera series has poor image illumination, white or bright white aperture at night
It should be said that the phenomenon is caused by improper assembly of the machine. When the photosensitive device (photoresistor) is too far away from the infrared hemisphere camera during assembly, it will cause the incomplete start of the infrared lamp to cause the night illumination of the machine to be poor; the phenomenon of image whitening or bright white aperture is mainly caused by The infrared light emitted by the infrared light emitting tube is refracted by the dome cover to the lens. To solve this problem, it is necessary to avoid the infrared light refracting to the lens surface. Usually, a sponge ring is used to isolate the lens from the infrared light. The ball cover must be tightly attached during assembly. Sponge ring.
Question three: IR Dome Camera color distortion, color cast <br> <br> switch may be improper white balance (AWB) setting, it may be ambient lighting conditions changed so much, you should check whether the switch is in the OFF position, should Try to improve the lighting conditions in the environment.
Problem 4: The night vision IR dome camera is normal during the day and white at night <br><br> This phenomenon is generally caused by reflections in the machine environment or in a very small space. This phenomenon is resolved due to reflection of infrared light. First of all, we should determine whether there are reflective objects in the use environment and improve the use environment as much as possible. Secondly, check whether the effective infrared distance of the machine is corresponding to the actual usage distance; if a long-distance infrared machine is used in a very small space, it will be caused by excessive infrared light. The machine image is whitish.
Question 5: black screen appears a few bars or bar hybrid <br> <br> This is generally the ripple of the output voltage of the power supply apparatus is too large, the filter should be strengthened and good performance using the DC power supply.
Question six: daytime color reproduction is not enough <br> <br> do not know if you have not noticed color infrared dome camera cast during the day will be more or less, the most direct reason is the problem of camera filters, general Infrared dome cameras use bimodal filters that transmit a certain proportion of infrared light. The advantage is that the cost is low, but natural light contains more infrared components. When it enters the CCD, it interferes with color reproduction. For example, green plants change. Gray and so on (especially outside the city with sunshine is particularly obvious). The use of the IRCUT dual filter effectively solves this problem. The IRCUT dual filter consists of an IR cut filter and a full spectrum optical glass. When the daylight is sufficient, the IR cut filter works, and the CCD is restored. With real colors, when the nighttime light is insufficient, the infrared cut filter automatically moves away, and the full-spectrum optical glass starts to work, making the CCD make full use of all the light, thereby greatly improving the infrared performance.
Question 7: The image of the infrared dome camera is distorted or geometrically distorted
This phenomenon may be a problem with the IR dome camera, the monitor's geometry correction circuit, or problems with the optical lens, or it may be that the characteristic impedance of the video connection cable or device does not match the output impedance of the IR dome camera.
When the above phenomenon occurs, please check whether the optical lens used is abnormal and whether the monitor's input impedance switch is set to 75Ω, and then check whether the impedance of the video cable used is 75Ω.
Eight issues: using an infrared camera hemisphere automatic iris lens image is too dark <br> <br> first check EE / AI AI function switch is provided at the end, then check whether a suitable LEVEL potentiometer adjustment.
Nine on: IR dome camera image <br> <br> no external power supply first check for correct polarity, whether the output voltage satisfies the requirements (power error: DC12V ± 10%, AC24V ± 5%), then check the video cable is in contact Good; if you use a manual iris lens to check the aperture is open, automatic aperture lens need to adjust the LEVEL potentiometer to make the aperture in the right position.
Problem 10: The image quality of the infrared dome camera is not good
a. Check if the lens is fingerprinted or dirty;
b. Check if the aperture is adjusted;
c. Check the video cable for poor contact;
d. Check if there is any problem with the electronic shutter or white balance setting.
e. Check if the transmission distance is too far;
f. Check the voltage is normal;
g. Check for nearby sources of interference;
h. Check that the elevator is insulated from the interference when installed in the elevator;
i. Check whether the CS interface is connected.
Applications: