Common problems with waterproof coating agents, the difference between waterproof coil and waterproof coating The difference between waterproof coil and waterproof coating is caused by the production of raw materials, processes, etc. The characteristics, construction process and application environment of the two are different.
waterproof materials
Advantages - no need to maintain the waterproof coil after construction; the thickness of the construction is easy to calculate according to the design, the material usage is calculated accurately; the construction site is convenient to manage, it is not easy to cut corners; the layer thickness is uniform; the ground layer stress can be effectively overcome when the air is laid.
Disadvantages - waterproof membranes can only use the splicing method to deal with complex base layers. It is difficult to overlap each other. The waterproof quality of the interface cannot be guaranteed, and the leakage is dangerous. The penetration of any part of the waterproof coil is broken, degumming and leaking. There is only one place), the waterproof function of the entire connected layer will be completely lost. If the damage and the defect are not found, the partial repair will not be possible, then only the redo waterproofing; the waterproof coil construction intensity is large, the construction The actual construction capacity of personnel is required to be high; the construction period of large-area waterproof engineering is long.
Waterproof coating
Advantages - ignoring the complex surface problem can be made into a continuous overall waterproof layer; the equipment is simple, the construction technology is easy to master; the large-area construction period is short, the construction strength is low; the coating waterproof layer and the base layer have 100% bonding surface (crack, Nodes and other parts use the reinforcement layer emptying method); the water leakage of the coating waterproof layer within the useful life, most of the base layer cracking width exceeds the extendable range of the waterproof coating, the cause of water leakage and the formation of water leakage are easy to find, the warranty is very Convenient, as long as a small amount of waterproof material repairs cracks and damaged parts; high-quality waterproof coating can be successfully waterproofed on the back surface. Part of the waterproof coating can be applied on a wet base and form a waterproof layer.
Disadvantages - some coatings require a certain period of physical and chemical reaction to form a waterproof layer after consolidation; some waterproof coatings release harmful gases during the curing process, which is harmful to the human body. Some waterproof coatings need to be painted many times for the completion of a waterproof layer. Each time there is a certain interval between paintings, the final completion of the waterproof layer takes a long time; during the construction of waterproof coating, on-site management is very important. Cut corners and rough shoddy will be organic in case of management negligence; the thickness of the coating waterproof layer is determined according to the number of coating passes during construction. In addition to the number of coating passes, the solid content of the coating itself is the determining factor of film thickness.
Compared with the shortcomings of waterproofing membranes, the disadvantages of waterproof coatings are that technological advancement and material selection can be solved. The choice of better waterproof coatings, the above shortcomings do not exist, only need to strengthen the waterproof construction site management.
Hesheng waterproof material manufacturer â— National hotline: 0757-22904888 / 22904666 â— Official website login: â— Address: No. 10, Fuyuan Road, Ronggui, Shunde District, Foshan City, Guangdong Province
Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
Camera Module is generally composed of the following parts: Lens, image sensor, base bar and line.
If it is a camera module with AF function (generally a mobile phone camera), most of them adopt VCM mode, which has one more coil than the above structure. By adding points to the coil, the lens can move vertically to achieve the function of focusing. In the case of a camera with a shake resistant feature, the lens is also able to move horizontally to achieve an optical shake resistant effect
Camera module selection
The sensor and lens in the camera module usually account for more than 90% of the cost, and the image quality is also determined by them.
First, choose the most appropriate sensor according to the price you can accept, the interface of the motherboard, and the resolution you need to take photos and video
The price of the sensor usually accounts for 40%-60% of the price of the module. In order to ensure that the resolution/frame rate can meet the requirements, sensors with better sensitivity and larger pixel area are selected at a certain cost.
Secondly, according to the purpose of the sensor you need, choose the lens with the appropriate size and field of view Angle. If a lens with a large field of view is needed, you can choose a fish-eye camera (also known as a wide-angle camera). However, for the image taken by the fisheye camera, there will be a distortion effect. In fact, the distortion effect can be corrected by itself.
Elp Usb Camera,Laptop Camera Module,Blink Sync Module Usb Port,Phone Camera Module To Usb
Tonya Display Limited , https://www.tydisplay.com