Determining the quality of camera imaging depends on the quality of the lens and the size of the sensor. With the light and thin requirements of the mobile terminal device, the sensor size and the optical quality of the lens cannot be maximized. In this scenario, the second lesson is implanted. The camera is not a good choice to improve the image quality. As early as 2011, HTC launched the first mobile phone EVO 3D (G17) to shoot 3D video dual camera, then HTC introduced the recording depth of field data to achieve "first photo One M8 with dual-camera function, the domestic mobile phones such as Huawei and Qiku have also launched the configuration mobile phone. Different dual camera advantages have become the core competitiveness.
Dual camera principle
The transition from a single camera to a dual camera can be seen as a two-dimensional to three-dimensional transition. This should be easier to understand. Two-dimensional x and y axes, such as a sketch, our overall feeling is "flat". And 3D is an additional z-axis dimension. The intuitive understanding of this z-axis is the distance from us.
To give a simple example, if you look at our eyes, it is easy to understand. The human eye is a typical binocular system. You can do a small experiment: close one eye, then hold one for each left and right hand. Pen, try to make the tip of the pen touch, how can you not do it? We can see the same object with the left and right eyes separately, and we can clearly feel the difference of the image. This difference is the basis of our three-dimensional vision. With the difference of the left and right eye images, combined with the powerful recognition and matching ability of the brain, we can basically determine The distance of the object from us, we only open one eye in the experiment, although we can clearly see the pen in the left and right hands, but the brain can not get the depth information, so you can accurately locate in the "up, down, left and right" direction, but There is nothing in the "front and rear" direction. The generation of dual cameras is also to make up for this deficiency.
As far as bionics is concerned, many animals, including humans, have two eyes, and animals such as insects have a large number of eyes, which we call arrays. It can be said that the mobile phone from a single camera to a dual camera or array lens is the result of a natural evolution.
Returning to the mobile phone, when we take pictures, the two cameras will be the same as our eyes, each performing their own duties, one lens is responsible for image color collection, and one lens is responsible for the collection of brightness, contour and detail ISP, the latter will be The summary of the information will present a better final piece.
Advantages of each company's dual camera
At present, the application of dual cameras on mobile phones is more common. Next, let's take a look at the advantages of the dual cameras of major smartphone manufacturers.
Naked eye 3D
At first, Sharp, HTC, and LG developed a naked-eye 3D mobile phone. Capture 3D photos or videos directly from two lenses of the same pixel so you can see the effect on a screen that supports naked-eye 3D display.
Depth of field assistance
TC One M8 and ZTE AXON and Red Rice Pro are representative models of this type of technology. In general, the secondary lens has a lower pixel size and is used to record depth of field information without directly affecting the quality of the shot. When shooting a sample, the dual shots work together, and a more free background blur can be achieved by means of photo synthesis.
Bionic parallel
Stepping into 2014, when domestic mobile phones were undergoing a period of innovation, the dual cameras became the "killer" for them to compete in the high-end market. Cool and Glory have launched the Cool Platinum and Glory 6 Plus with dual lens. These products are different from the depth of field assisted dual camera. The dual rear lens also has the corresponding CMOS for taking higher pixel photos. Arranged in parallel for bionics.
Technically, this type of dual lens has a larger amount of light and a light-sensing area, and can also achieve first focus, focus adjustment and virtual aperture adjustment. However, this is also more demanding for later software synthesis algorithms.
Color black and white
On the basis of parallel double-shot, this year we are welcoming color + black and white dual-lens. Representative products are still domestic models, such as Huawei P9, Qi Cool Ultimate, Glory 8, Cool 1 Cool. Generally, the main lens will be equipped with a color sensor, and the sub-lens will be a black and white sensor with the same pixel. When shooting, the dual lens can work together to synthesize photos, the color lens collects the image color, and the black and white lens complements the image brightness and detail.
Wide angle assist
The dual lens can also be used in wide-angle shooting, and the representative product is the LG G5. Although it has a dual lens, the shooting part is more dependent on the main lens. The auxiliary lens is an option for wide-angle lens, suitable for shooting wide scenes outdoors. These two lenses cannot be used to improve image quality at the same time, but are used separately.
optical zoom
Corephotonic has previously demonstrated an alternative dual-lens prototype that can simultaneously capture distant and close-up shots with lenses of different focal lengths, ultimately relying on software algorithms to achieve similar effects to optical zoom. Corephotonic refers to this type of camera as a "computing camera" that allows photos to have higher resolution while also reducing noise in low light conditions. It is a pity that there is currently no corresponding product equipped with this dual lens technology.
Augmented Reality
Not long ago, Lenovo released the black technology product Phab 2 Pro. The biggest feature of this machine is equipped with three lenses, the main lens is used to take pictures, and the sub-lens is composed of wide-angle lens and motion capture camera. The combination of multiple lenses enables motion tracking, depth perception, and regional learning, which is our common AR augmented reality.
to sum up
At present, the dual-camera mobile phone is mainly based on improving the quality of the photographing. Under the premise of changing the image quality, the consumer can actually experience the effect of the double lens instead of the marketing of Shantou. However, looking at the dual-lens that is currently on the market, although the amount of light and the noise control are slightly improved, this improvement is not a qualitative change. But what is certain is that this year will be a year of double-lens mobile phone comeback. The relatively mature technology development, the strong support of industry giants, developers and supply chain manufacturers will drive the dual-lens mobile phone to spread more quickly.
I. High & Low voltage cabinets installation of power plant
1. 10KV high voltage switch cabinet installation of power plant
2. 0.4KV low voltage switch cabinet installation of power plant
3. Installation of generator protection system, synchronization system, transformer protection, H.V. motor protection, circuit protection in a power plant.
II. Electrical configuration testing items of power plant
1. Vacuum circuit breaker insulation resistance measurement, each phase circuit resistance measurement and AC voltage withstand tests of 10KV H.V. switch cabinet.
2. DC resistance measurement of CT and PT, polarity test, ratio test, AC voltage withstand tests in 10KV H.V. switch cabinet.
3. AC voltage withstand tests for whole 10KV H.V. switch cabinet.
4. AC resonant test for 10KV H.V. electric cable.
5. DC resistance measurement of generator stator and rotor.
6. Generator stator coil insulation resistance measurement and DC voltage withstand tests.
7. Generator rotor insulation resistance measurement.
8. Generator rotor AC impedance and power loss tests.
9. No-load characteristic test of generator
10. Generator checking phase sequence (fist checking phase and second checking phase separately).
11. Generator short circuit characteristic test.
12. Measurement of residual voltage of stator after automatic magnetic blow-out and switch opening of generator.
13. Generator shaft voltage measurement.
14. Generator simulate synchronization.
15. All of the second circuit checking, measuring, switch tripping & closing tests, protection fixed value setting, protecting the STG trip test and magnetic blow-out tripping test for steam turbine and generator.
III.Electrical problem troubleshooting in power plant
Problem Description: a coal mine`s 35KV H.T. switchgear OC protection tripped suddenly in He`nan Province, it caused sudden power lost of mine fan and endanger miner safety.
Auto-reclosing via switchgears` automatic reclosing function, through analysis, the reason is a set of 3000KW generator failure. Specific reason is: When the turbo-generator was running normally, exciting voltage lost suddenly, leading phase operation happened, the generator absorbed reactive power and lead to becoming motor running. Generator protection and power plant connecting line protection did not launch. After the generator absorbed a certain value of reactive power, the 35KV H.T. switchgear`s OC protection tripped.
Investigation: generator and power plant connecting line protection setting fixed value exceed the protection fixed value of 35KV switchgear side, it lead to nearby protection did not launch and override trip when generator failure.
Electrical Cabinet Care,10Kv Electrical Cabinet Care,0.4Kv Electrical Cabinet Care,Electric Governing Reconstructing
Shandong Qingneng Power Co., Ltd. , https://www.steamturbine.be