Infrared camera four problems focus shift
Due to different wavelengths of visible light and infrared light, the imaging focus is not on one plane, resulting in clear images under visible light conditions during the day, blurring under nighttime infrared light conditions, or clear images under nighttime infrared light conditions, and image blurring under daytime visible light conditions. It can be solved in three ways. First, the use of automatic focusing integrated camera; second, the use of IR special focus does not shift the lens; third, the use of professional adjustment tools, under the existing lens conditions can also be achieved without offset.
Color problem
All black and white cameras are infrared-sensitive. Infrared light is a stray light for a color camera under visible light conditions, which will degrade the sharpness and color reproduction of the color camera. The filter of the color camera is to prevent infrared rays from participating in imaging. There are two ways to make the color camera sense infrared light. First, switch the filter to block the infrared light from entering under visible light; remove the filter under the condition of no visible light and let the infrared light enter. The image quality is good, but the cost is high and the switching mechanism will cause a certain failure rate. Second, opening a specific infrared channel on the filter allows infrared rays with the same wavelength as the IR lamp to come in. This method does not increase the cost, but the color reproduction is slightly worse.
The problem of sensitivity
Camera sensitivity is a core part of infrared night vision monitoring. The better the sensitivity, the stronger the ability to sense infrared rays. Of course, the better the sensitivity, the more expensive the camera is. In general, an infrared night vision system within 50 meters is better if a camera with 0.1 lux is used; a night vision system with a range of 50 meters to 100 meters should use a camera with 0.01 lux; a night vision system with a distance of 100 meters or more should be 0.001 lux. Above the camera. Of course, as the sensitivity increases, the price of the camera will increase significantly.
Of course, like many other products, the phenomenon of camera imaginary indicators is particularly serious. I once took a 0.1 lux camera and a camera with a nominal 0.0001 lux for comparison. The latter was not as good as the former. More camera manufacturers artificially improve the signal strength, the sensitivity is very good, but the signal-to-noise ratio is very poor, resulting in a lot of night images "snow spots" a lot.
The problem of distance
One hundred people will have a standard infrared night vision distance for infrared products. I think it should be based on the effectiveness of the customer's application. What is the customer's standard? It is to see people! What are the "visual distances" and "discovery distances" are all ambiguous. The matching of cameras and lenses in different grades may cause the sensitivity of the light emitted from the same infrared lamp to be many times different, and the visual distance may also be much different. Therefore, it is unscientific to say how many meters a concrete infrared light is. A working distance of an infrared lamp can only be determined by matching the camera and lens of a certain quality. Also, because of the different environments in which the applications are applied, the effects will be very different and it is best to leave a certain margin.
Infrared camera troubleshooting
Infrared cameras are popular among people in recent years. The main reason is that they are low cost and easy to install. However, there are always some issues that we can not think of during the use of infrared cameras:
1, waterproof and cooling effect is not ideal:
After a long period of use, there will be more or less soda (this phenomenon is mainly concentrated in the northern regions). The main reason for this phenomenon is that the sealing effect of the shell is not enough and the temperature difference is not taken into consideration when the machine is used. When the infrared lamp starts working, a large amount of heat will be generated, and at the same time, the heat dissipation effect of the part housing will be insufficient, which will greatly reduce the service life of the camera. In order to solve this problem, it may be considered that the camera housing is made of a plurality of wire troughs. It is good for heat dissipation.
2. The night vision effect is not ideal:
The main manifestation of this phenomenon is the effect of the flashlight or the distance is not enough. In fact, this problem is mainly caused by the infrared light's angle and function. The infrared light used by our infrared cameras is also called the 850 infrared launch tube. The peak wavelength is 850, and the angle can be selected from 5-60 degrees. When the infrared launch tube angle The smaller the farther the irradiation distance, the more obvious the effect of the flashlight. Conversely, the greater the angle, there will be no flashlight effect, but the distance will be greatly reduced. To solve this problem is to look at what kind of effect manufacturers want to pursue and what kind of cost Of course, the power and price of infrared emission lamps are directly proportional to each other. How many lamps are generally stated by some manufacturers when they tell customers? How much can you reach? But we may have overlooked one problem - the power and diameter of infrared lamps. When the appearance and size of an infrared lamp are the same, there is no way to know the power. The only way possible is to have a physical test. From my personal experience in the production of infrared cameras to solve this problem, I used a multi-angle infrared lamp hybrid installation, so that resources can be fully utilized and can be taken into account in the distance.
3, color reproduction is not enough during the day
We do not know if we noticed that the infrared camera's color will be more or less color cast in the daytime. This is the most direct cause of camera filter problems. In general, infrared cameras use bimodal filters that can transmit a certain percentage of infrared light. The advantage of the light sheet is its low cost, but since natural light contains more infrared components, it will interfere with color reproduction when it enters the CCD, such as when the green plant turns gray, etc. (the outdoor environment with sunlight is particularly noticeable). The use of the IPCUT dual filter effectively solves this problem. The IRCUT dual filter consists of an infrared cutoff 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.
4, repeated changes in the critical point
This is because some cameras, whether equipped with IRCUT dual filter or bimodal filter, cannot work stably under certain complicated lighting conditions, and because most manufacturers use simple resistors such as photoresistors. Sensors and other methods to control the IRCUT bimodal filter's working state, the critical point of repeated changes will not be satisfactory. However, if the smart chip is used for control, its fuzzy logic capability can effectively control the working status of the IPCUT dual filter. In other words, many manufacturers are unwilling to invest in this.
Gin Pole Operations
On the documentation side on things, operator will need adequate details depicting the planned operational configuration(s) for the complete gin pole system to be used including:
•Gin pole mast
•Top lifting block
•Load and tag line sizes/configuration (including use of heel block, max load position angle, max tag angle, tag arrangement, etc.)
•Basket and bridle attachment to gin pole and supporting structure including associated hardware and sling sizes/config
•All relevant details pertaining to jumping/lowering the pole into position
•All relevant details pertaining to tilting the pole for operation (use of luffing block, etc.)
•Any other relevant details based upon user`s planned operational configurations for assembly, setting, jumping, arranging, lifting, and/or removal of the system
As pole manufacture MARSHINE we only address the gin pole mast and allowable load and tag capacities / angles based solely upon the mast`s rated strength. Affirming the pole was designed, built and load charts are in accordance with the ANSI/TIA-322 standard. Its operator responsibility to ensure they are in compliance with all regulations related thereto.
Complete records of pole inspections and record of Magnetic particle inspection shall be performed on 10% of the welded connections every 10 years.
Annual inspections reports shall be maintained for a minimum of two years.
All gin pole operations must be in compliance with the latest revision of ANSI/TIA-322 and the OSHA CPL 2-1.36
Maintain your required documents along with work plan, engineer sign off for each specific job.
ANSI/TIA-322 standard includes an impact factor of 1.7 for all gin poles using synthetic load lines.
Gin Pole storage racks for gin poles are recommended for safe transport, storage and return shipping for inspection service. These units protect and reduce the potential of damage from excess handling with forks etc.
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