Weak cables refer to cables used for security communications, electrical equipment, and related weak current transmission applications.
Wire and cable refers to materials used for power, communications, and related transmission purposes. "Wire" and "cable" do not have strict boundaries. Usually, the product with a small number of cores, a small product diameter, and a simple structure is called a wire. A wire without insulation is called a bare wire. Others are called cables. A conductor with a larger cross-sectional area (greater than 6 mm2) is called a large wire. Small (less than or equal to 6 mm2) is called a small wire, and an insulated wire is also called a cloth wire. Low Current Cables,Charter Cable,Spectrum Cable,Coaxial Cable Jiangsu QiSheng Cable Co., Ltd. , https://www.shuaihe-cable.com
Currently, the domestic LED industry is faced with problems such as overcapacity, low-end products, rising costs, and price competition, resulting in serious product pressure and decline in corporate profits. Some analysts pointed out that the domestic LED industry is in the winter period.
National Star Optoelectronics Co., Ltd. Xu Rui Photoelectric is in the cold winter of the LED industry. Xu Rui photoelectric has been discontinued for 9 months, some of the key personnel have been lost, equipment is in a stagnant state, and there are certain operational risks. Xu Rui Optoelectronics achieved operating income of RMB 1,603,200 in January-August 2012 and a net loss of RMB 6,308,499. At present, the book value of the long-term equity investment of China Star Optoelectronics to Xurui Optoelectronics is 64.83 million yuan, holding a 15% stake in Xu Rui Optoelectronics. In view of the current operating status of Xu Rui Optoelectronics, the company has decided to make an impairment assessment for this long-term equity investment of Xu Rui Optoelectronics. The provision amount is expected to be between RMB 37 million and RMB 41 million and the reporting period will be 2012. year.
Under the above circumstances, National Star Optoelectronics announced on the evening of January 17th that it decided to increase 50 million yuan for Xurui Optoelectronics. Upon completion of the capital increase, Xu Rui photoelectric will become a subsidiary of China Star Optoelectronics.
At present, Xu Rui photoelectric registered capital of 205 million yuan, total equity of 2.05 billion shares, including shareholders, including SemiLEDs, National Star Optoelectronics, Beijing Long Po Optoelectronics Co., Ltd., Zhejiang Shenghui Lighting Co., Ltd., Beijing Aier Yidi Investment Co., Ltd. The company and six companies in Foshan Nanhai High-Tech Industrial Investment Co., Ltd. Among them, SemiLEDs holds a share of 49%, and Guoxing Optoelectronic holds a 15% stake.
First of all, SemiLEDs transferred its 33.43 million technology shares to other shareholders without compensation, including the transfer of its 12.15 million shares of Asahi Optoelectronics, which are legally held by China Star Optoelectronics. Therefore, the shareholding of National Star Optoelectronics will increase from 15% to 21.11%. Under the above premise, Xu Rui Optoelectronics has reduced its existing share capital by 4.0966:1. The total share capital has been reduced from 205 million shares to 50 million shares, with a par value of 1 yuan each, and the registered capital has been reduced from 205 million yuan to 50 million yuan.
Secondly, Guoxing Optoelectronics purchased 50 million shares of Xurui Optoelectronics with 50 million capital increase. Xu Ruiguang’s registered capital increased from 50 million yuan to 100 million yuan, and the total share capital increased from 50 million shares to 50 million shares. 100 million shares, other shareholders abandon the priority of new shares.
As of August 31, 2012, Xu Rui Optoelectronics audited total assets of 543 million yuan and net assets of 174 million yuan. Xu Rui photoelectric converted to 50 million shares in the above manner, the equivalent of 3.48 yuan per share of net assets, while the National Star Photoelectric Co., Ltd. increased the subscription of 50 million shares, the price per share is only 1 yuan, on the surface it looks It is very cost-effective for Xu Rui photoelectric to increase capital. Moreover, China Star Optoelectronics will also acquire a controlling stake in Xu Rui Optoelectronics.
However, at present, the LED industry has not yet recovered, and National Star Optoelectronics also acknowledged that the increase in the investment of Xu Ruiguang with 50 million yuan still involves fierce competition and the risk of asset impairment caused by falling prices. Moreover, Xu Rui photoelectric has been discontinued for 9 months, the company needs to take measures as soon as possible to resolve Xu Rui photoelectric normal production and operation needs.
The company stated that this increase in capital Xurui Optoelectronics is a strategic layout of Guoxing Optoelectronics' expansion of the industrial chain. By injecting capital and technical strength into Xurui Optoelectronics, the company will integrate the existing product demand of National Star Optoelectronics, so that Xu Rui Optoelectronics' production will gradually become normal. To avoid the risk of bankruptcy and liquidation of Xurui Optoelectronics, thereby reducing the possibility of the company continuing to impair the long-term equity investment of Xu Rui Optoelectronics.
The business of National Star Optoelectronics and Xu Rui Optoelectronics is similar, and the integration of National Star Optoelectronics with Xu Rui Optoelectronics may be relatively easy. China Star Optoelectronics' acquisition in the downturn of the industry may in particular provide the conditions for making up for the losses caused by the previous serious losses, which may be a wise choice. However, the effect of holding Xu Rui photoelectric still needs time to test.
Wire and cable include bare wires, electromagnetic wires and insulated wires for electrical appliances, power cables, communication cables and optical cables.
1, the content included in the product name
(1) Product application or size class name
(2) product structure materials or types;
(3) Important or additional features of the product
Basically named in the above order, sometimes to highlight important or additional features, features are written before or before the corresponding structure description.
2, the order of the structure description
The product structure is described in terms of the principle from the inside to the outside: Conductor-->insulation-->inner sheath-->outer sheath.
3, simplified
Some structures describe writing or abbreviations without causing confusion.
Composition
From the inside to outside by the inner conductor, insulation, outer conductor and sheath;
Inner conductor: Since the attenuation is mainly caused by the resistance of the inner conductor, the inner conductor has a great influence on the signal transmission
Insulation: Impact attenuation, resistance, return loss and other properties
Outer conductor: loop conductor, shielding effect
Video signal transmission generally adopts direct modulation technology and takes the form of baseband frequency (about 8MHz bandwidth). The most common transmission medium is Coaxial Cable; coaxial cable is specially designed to transmit video signals, and its frequency loss, image distortion, The amplitude of image attenuation is relatively small, which can well complete the task of transmitting video signals.
Commonly used special SYV75 ohm series coaxial cable; commonly used model is SYV75-5 (its non-relay transmission distance for the video signal is generally 300-500m); when the distance is long, SYV75-7, SYV75-9 must be used Axle cable (In actual engineering, the relayless transmission distance of the thick cable can reach 1km or more)
The communication cable is generally used in an imaging device equipped with an electric pan/tilt head and an electric lens, and a remote control decoder must be installed in the field when in use; a communication transmission cable between the on-site decoder and the video matrix switching host of the control center is generally adopted. 2-core shielded communication cable (RVVP) or category 3 twisted pair UTP, with a cross-sectional area per core of 0.3mm² ~0.5mm²; the basic principle for selecting a communication cable is that the longer the distance, the larger the wire diameter; RS-485 communication regulations The basic communication distance is 1200m, but in the actual project, the RVV2-1.5 sheath line can be used to extend the communication length to over 2000m.
The control cable usually refers to the multi-core cable used to control the PTZ and the electric variable lens; one end of the control cable is connected to the PTZ of the controller or the decoder, and the electric lens controls the terminal, and the other end is directly connected to the PTZ. On the corresponding terminals of the electric lens, the control cable provides DC or AC voltage, and the distance is generally short (sometimes less than 1m). There is basically no interference problem, so no Shielded Cable is required.
Commonly used control cables mostly use 6-core or 10-core cables, such as RVV6-0.2, RVV10-0.12; 6-core cables are connected to the top, bottom, left, right, automatic, and public 6 terminals of PTZ respectively, 10 cores In addition to the six terminals of the pan-tilt head, the cable includes four zooming, focusing, aperture, and common terminals of the electric lens; in the monitoring system, the control cable from the decoder to the pan/tilt head and the lens is short due to the short distance. Generally do not make special requirements; and from the central control room controller to the pan and tilt and electric lens distance is as small as tens of meters, as many as several hundred meters, the control cable needs to have certain requirements, that is, the diameter of the wire should be thick, such as selection RVV10-0.5, RVV10-0.75
Audio Monitoring Cable generally uses 4-core shielded communication cable (RVVP) or Category 3 twisted pair UTP, with a cross-sectional area of 0.5 mm² per core;
The audio signal of the monitor head in the monitoring system is transmitted to the central control room and is a point-to-point wiring method. It is transmitted with high voltage and low current, so an unshielded 2-core cable can be used, such as RVV2-0.5.
RVV2*0.3 (signal line) and RVV4*0.3 (2-core + 2-core power) cables are generally used between the front-end detector and the alarm controller; the two controllers are generally used between the alarm controller and the terminal security center. Signal line
Whether the signal line is shielded or twisted or it is a common sheathed cable, it needs to be determined according to the requirements of various brands of products; the rough specification of the signal line diameter is determined according to the distance and quality of the alarm controller and the center; alarm control The power supply of the device generally uses local power instead of centralized power supply in the control room. The line is short, generally adopting RVV 2×0.5" or above specifications; the perimeter alarm and other public area alarm devices generally use centralized power supply mode, and the line is longer. RVV2*1.0" or above specifications are generally used
Cables used in building intercom systems are mostly cables such as RVV, RVVP, SYV, etc.
Has: transmission of voice, data, video images, while cable requirements also reflected in the quality of voice transmission, data transmission rate, video image transmission quality and speed, etc.
Cables that transmit voice signals and alarm signals mainly use RVV4-8*1.0
Video transmission is based on SYV75-5 cable
Some systems must use RVVP cables in the system when they are afraid of external interference or cannot be grounded.
Direct Push-to-Talk Visual Intercom System Line Standard:
Video terminals, two-way audio and remote control unlocking terminals of all indoor units are connected to the door machine in a bus way, but each call line is directly connected to the door machine alone.
--Video coaxial cable SYV75-5, SYV75-3
- Use a 4-core non-shielded or shielded sheath cable (AVVR4, RVV4, or RVVP4, etc.) for the microphone/speaker/unlock cord
- A 2-core jacket wire (AVVR2, RVV2, etc.) for the power cord
-- 2-wire shielded cable for call lines (RVVP2)
Digital coded push-button video intercom system:
- The main line includes video coaxial cable (SYV75-5, SYV75-3, etc.)
- Power cord (AVVR2, RVV2, etc.)
-- Audio/data control lines (RVVP4, etc.)
- Household Signal Line (RVVP6, etc.)