In fact, it is not difficult to find that the design of weak wiring is very important, we must pay attention to it, this is the first step to achieve digital home. If you think about it, if you want to add any new demand after the renovation, you can only take the bright line. Of course, you may adopt wireless technology to achieve it. However, there are many problems that cannot be solved by wireless connection. Some knowledge of weak wiring is definitely beneficial.
The weak wiring system we have described is the fourth indispensable home infrastructure after water, electricity and gas. For the construction of digital homes, this is a fundamental job and very important. The object of weak electricity processing is information, that is, the transmission and control of information, which is characterized by low voltage, small current, low power and high frequency. The main consideration is the effect of information transmission, such as the fidelity, speed and breadth of information transmission. ,reliability. In general, weak electricity mainly includes telephone lines, network lines, cable lines, audio lines, video lines, audio lines, and the like. The weak current pipe exhaust method is almost the same as the strong electricity, and also wears PVC pipe. It is better that the cross section of the wire does not exceed 40% of the cross section of the PVC pipe. Again, don't wear too much, and strong and weak electricity must not be worn in the same pipe. And try to separate, the distance between strong and weak electricity is at least 20 cm, otherwise there will be interference.
The function of weak current wiring
As the basis of digital home organization, wiring is more convenient for our application in the future. In general, mutual communication is a basic requirement. The specific aspects are as follows:
Several aspects related to home integrated wiring
Television
This is all understand. TV is a common way of family entertainment and leisure. The old people and children in the family have different preferences. They all have their own fixed viewing channels and "exclusive columns". In each room, there is a TV, there will be no remote control. The phenomenon of the device.
2. Telephone
Maybe you will say, isn't there a cordless phone? It's okay to use it, but no one actually puts a beautiful cordless phone in the kitchen and bathroom. Things that used to yell in the room and fly to pick up the phone will not happen again, and your freedom of call is also kept secret. Each room can also talk to each other.
3. Broadband network
INTERNET's epoch-making vocabulary is also being integrated into our lives. Sitting at home through the Internet, you can easily work online, online entertainment, online shopping, and truly enjoy the convenience and ease of getting things done. Nowadays, many cities in China have already opened broadband IP metropolitan area networks, and the concept of “broadband information community†has become an increasingly popular choice for families. We can provide not only broadband to the home, but also "broadband to the table", "broadband to bed", to any place you need! Make your online life better!
4. Home theater
Many friends ignored the pre-appreciation of the line in the decoration. After the decoration was completed, they found that the two rear surrounds could not be solved. The Laming line was not safe, and it was not necessary to remove it. It took time and money, and it may damage the decoration. overall effect. Therefore, before the decoration, friends who like music should not forget the wiring project of this system.
5. Video sharing with red teeth control
Many friends think that watching a movie goes to the living room and seeing it. Is it so troublesome? In the room, you have to go to the DVD to control it. The simple things become complicated. Now with advanced infrared learning remote control, you don't have to get up, so you can easily control the outside equipment in your own room.
6. Headphone access
In the middle of the night, you can also listen to your favorite programs (music) at will, without affecting the rest of others, why not.
7. Background music
After a hard day, you will return home, free to relax your mood, listen to music, feel the peace and warmth of your home, and the stress of work will fade away. Background music design According to your needs, in any room including kitchen, bathroom, study, balcony, you can put music points, pass high-fidelity music to each room through one or more sound sources, you can The need to independently control the volume of each room.
How many planning interfaces are needed
When designing wiring, we should consider the needs of the future. For example, in addition to setting information points beside computer desks and sofas, is it necessary to arrange information points in the kitchen to accommodate occasional Internet access during breakfast in the kitchen, or the need for smart refrigerators in the future? It is also a kind of information point behind the TV cabinet. Very eye-catching approach, from game consoles, set-top boxes to TV sets, we will see a variety of home appliances equipped with RJ-45 Ethernet interface. At present, power line networking has begun to enter the actual stage.
Each household can introduce two 5 types of 4 pairs of twisted pair cables, and if necessary, 2 core fibers can be set; 1-2 75Ω coaxial cables and corresponding sockets can be laid simultaneously; each household should set up a wall-buried family information access box. Each bedroom, study, living room, dining room, etc. should be set with no less than 1 information outlet, or fiber optic cable socket, and 1 cable TV socket, or set according to user needs; the main bathroom should also be set up for telephone information. Socket; each information socket, cable socket or cable TV socket to wall-buried family information access box, each laying one 5 type 4 pairs of twisted pair cable, 2 core fiber cable or 1 75Ω coaxial cable; wall buried family The cabinet of the information access box should be in place at one time to meet long-term needs.
Wiring basics
1. The purpose of household weak wiring is to share resources such as network, telephone, cable TV, etc. It is best to have the three main interfaces of the main room. Network, telephone, cable TV home frequency division equipment is generally one into four out (more, there are more expensive), if it is two rooms and one hall can generally be in the living room, master bedroom, second bedroom network, telephone, TV interface The restaurant has a TV interface and the bathroom has a telephone interface. If there are more rooms, you can choose to reserve them; you can also run out the lines first, put them in the weak electricity distribution box, and replace the plugs to each room when needed. Audio and video are different. Although they can be shared by frequency, they can only provide signals for one terminal at the same time at home. I don't think there is a need to leave an interface in every room.
2. For weak electrical wiring to achieve sharing and interworking requirements, it is necessary to use crossover or switching equipment. The switching device of the internal and external network of the network is a router (for LAN) or a modem (for ADSL), which is a cat. The price is about 300 yuan. The switching device of the internal network is a switch or a hub. The switch is better, and the price is less than 200 yuan. The hub is now available at 80-90. There are routers with switches on the market and cats with their own routers and switches. The price is 300-500 yuan. It is recommended. The telephone crossover equipment is a switch or a distribution box, and the switch is good. The price is 100-200 yuan. The junction box is very cheap, but each room cannot communicate with each other, and it can't carry more than 3 telephones. The TV crossover equipment is The crossover (support) device should be clear to everyone.
3. The weak current line should adopt star-shaped wiring, and radiate from the switching and frequency dividing equipment to each port. From the point of view of simple wiring construction and convenient maintenance, it is best to put all kinds of equipment in the same place. At present, the new house door generally has a weak power distribution box, and various line connectors are reserved in the power distribution box; some are not reserved connectors, but the line is turned in the box and then leads to a room. It does not matter, cut the line in the box, the end of the household is connected to the IN jack of the crossover device, and the other end is connected to the OUT jack, and continue to use. We can transform the weak power distribution box itself, install the switching and crossover equipment, and note that most of the equipment needs electricity. The power outlet should be left in the weak power distribution box. The basic functions of weak power distribution boxes sold in the market are not available, mainly in the network. Although there is an interface that is in and out, it is only a distribution frame. It is impossible to achieve internal communication and multiple computers at the same time. It is more expensive. Not as good as DIY yourself. It is more troublesome for individual houses to have no weak electrical distribution box wiring, or to put various equipments next to the account; or to bring the household lines together first.
4. The way to access the Internet is to dial the phone directly; ISDN is also called the first line; ADSL is also called the super line; LAN is the network line; and the cable line and power line are used for Internet access. The first two are outdated and need not be considered; the latter two are not popular only in some places, ADSL and LAN are currently mainstream, ADSL theoretical transmission speed is 8M/sec, LAN can reach 100M/sec, but telecommunications is generally Only the bandwidth of 512K-2M is opened. In actual use, the limitation of the line condition, the number of users and the width of the telecom exit is generally not reached. The maximum speed of ADSL and LAN is not necessarily used at present, but the network cable should be developed. Direction, if possible, should be preferred.
5. Think different rooms at the same time online, there are two options: one is to install a router or cat with its own switch, the other is to install simulation software on one of the computers, use a computer as a proxy server, the cost is if other computers access the Internet The proxy server must be open. The first method is recommended. There are also cats that use ADSL telecommunications generally do not have a switch to buy separately.
6. 8-core network cable for weak wiring network; telephone line for telephone; coaxial cable for cable TV. If there is a weak electric distribution box, the three lines can take a casing, which is convenient. The network cable is eight-core. At present, there are four families in the family that have no practical use. They can borrow two telephone lines, but the effect is not as good as the individual. The telephone line also has 2 cores, 4 cores and 6 cores. The home is also useful for two lines. The quality of the cable is very important (especially the coaxial cable). My experience is that if the signal is disturbed or attenuated, the problem may be more than 70% on the line, and the machine is less likely to be faulty. But now there are a lot of cable fakes and bad goods, so you must pay attention when buying.
7. Weak electrical wiring should use special plugs and sockets. The network cable uses RJ45 head (also called Amp head / crystal head) and RJ45 head panel and module; telephone line uses RJ11 head and corresponding socket; RJ45 head Installation requires special wire pliers and wire tweezers. If you want to install it yourself, you have to buy it. And many weak electric lines, sockets are not sold in the decoration market, it is too expensive, you can go to Anshan West Road to see, much cheaper. Note that the Amp products on the market are basically not true.
8. Simply talk about audio and video wiring. Audio equipment includes the original signal (CD, VCD, DVD, MP3, etc.), amplifiers and speakers, connected by audio cables. From the original signal to the power amplifier, a single-strand audio cable is also used, which is also called a microphone cable; from the power amplifier to the speaker, a double-strand audio cable is generally used, which is also called a speaker cable; when installing the speaker, please pay attention to the matching terminal. It is best to connect directly from the amplifier to the main speaker. Do not use the binding post. It can be used for the surround or not, but the line should be as short as possible and as long as possible. Video equipment includes signal sources (VCDs, DVDs, VCRs, video cameras, TV boxes, satellite receivers, computers, and even game consoles) and playback terminals (television, computers, monitors, projectors, etc.). There are many types of cables and interfaces for video input and output, mainly D-Sub15pin interface (using the same VGA plug and socket as the computer); RCA (composite video) interface; S port (five-core lotus port); component video port. With that interface, the D-Sub is the best. Afterwards, HDTV (high definition TV) devices use D-Sub ports and cables; RCA is the worst, but it is acceptable to us. If your home video signal and playback terminal are not placed in one place (such as using a projector), you have to make wiring, audio and video plugs are bought, but the socket is difficult to buy, audio and video equipment are taboo connection If it is not too beautiful, it is best to connect the cables directly between the devices.
9. When wiring, the cable in the cassette should leave a head of about 10 cm. If the plug is connected, if it is wrong, it can be recovered. If you have not considered the weak electric wiring in the future, you can arrange the pipe and the cassette. The wire is pre-placed in the pipe, and the left part is left in the cassette to cover the blank panel; one end is left in the distribution box for future expansion. If you have no wiring during the renovation, and there are requirements in this regard, it does not matter, all kinds of wireless transmission equipment are now available, but it is relatively expensive, the standard has yet to be unified, and may become very popular in a few years.
Battery is the energy source of AGV car, and also relates to the service life of AGV car.Common battery types for AGV vehicles include nickel-cadmium battery, nickel-metal hydride battery, lithium battery and lead-acid battery, which have the following characteristics:
The nickel-cadmium battery used in AGV car has large internal resistance and can be used for large current discharge.
2. Nimh battery
It offers higher capacity at the same price as nickel-cadmium batteries, less pronounced memory effects, and lower environmental pollution.
3. Lithium battery
"Lithium battery" is a kind of battery with lithium metal or lithium alloy as negative electrode material and non-aqueous electrolyte solution. Because lithium battery has the characteristics of high energy density, high voltage and stable operation, it is widely used.
4, lead acid battery
The electrodes are mainly made of lead and its oxides, and the electrolyte is a kind of battery with sulfuric acid solution.Lead-acid battery has the advantages of good invertibility, stable voltage characteristics, long service life, wide application range, abundant raw materials, renewable use and low cost.
Rechargeable Battery Pack,Lithium Ion Battery,Lithium Ion Rechargeable Battery,Portable Battery Pack
Xinxiang Taihang Jiaxin Electric Tech Co., Ltd , https://www.chargers.be