Aquaculture digital wireless monitoring scheme design
Network standards IEEE 802.11a/n; IEEE802.3; IEEE802.3u chipset Atheros AR7240+ AR9280 SDRAM 32 M Byte Flash 8 M Byte Ethernet interface 2 x 10/100 Basic - TRJ45 Connector Wireless RF OFDM Data transmission rate 802.11a: 54, 48, 36, 24, 18, 12, 9, 6Mbps 802.11n: 20-MHz bandwidth: MCS 0~15 for supported data rates 40-MHz bandwidth: Data rates supported by MCS 0~15for working frequency 5.15~5.35 GHz 5.47~5.7 GHz 5.745~5.825 GHz Transmission power Up to 29 ± 2 dBm Sensitivity -92dBm@ 11Mbps, -73dBm @ 54Mbps, -73/-69dBm @ HT20/HT40 MCS15 safety 64-bit/128-bit/152-bit WEP encryption WPA/WPA2(-PSK using TKIP or AES) WPA/WPA2 (-EAP using TKIP) 802.1x authentication; hidden SSID Antenna port 2 x MCX connector Antenna gain Built-in 18dBi dual polarized plate antenna Operating mode Information Selection Mode - AP/ Client Bridge/ WDS Bridge PtP and PtMP (up to 8 links) Channel Selection (Setting variations by Country) Stepping power 1dBm step working environment Working temperature -30~+70°C, working humidity 10~90% Power supply POE power supply: 12~24V±5% size 270*270*80mm weight 2.2Kg (without packaging); 3Kg (with packaging) wireless WLAN standard IEEE 802.11 b/g/n, iPoll Transmission mode MIMO 2x2 Wireless frequency band 2.412 - 2.462 GHz (FCC 2.412 - 2.462 GHz) Transmit power Up to 31 dBm (varies by region) Acceptance sensitivity -96 ~ -74 dBm (varies depending on the modulation method) Channel bandwidth 5,10, 20, 40 MHz Modulation 802.11 g/n: OFDM (64-QAM, 16-QAM, QPSK, BPSK) 802.11 b: DSS (CCK, DQPSK, DBPSK) Data rate 802.11 n: 300, 270, 240, 180, 120, 90, 60, 30 Mbps 802.11 g: 54, 48, 36, 24, 18, 12, 9, 6 Mbps 802.11 b: 11, 5.5, 2, 1 Mbps Error correction method FEC, selective ARQ Duplex mode Time division duplex antenna Types of Integrated dual-polarization directional flat antenna (external) Gain 14 dBi;(Other antennas can be used as required) wired interface 10/100 Base-T, RJ45 software Wireless mode Access Point (Automatic WDS), Access Point (iPoll), Workstation (WDS, iPoll), Workstation (ARP NAT) wireless technology Intelligent dynamic polling, Automatic channel selection, Automatic modulation mode selection, Automatic transmit power control (ATPC) Wireless security WPA/WPA2 Personal Encryption, WPA/WPA2 Enterprise Encryption, WACL, User Isolation Wireless QoS iPoll achieves 4 queue priority Network mode Bridge, iPv4 routing, IPv6 routing network technology No NAT routing, NAT routing, VLAN WAN protocol Static IP, DHCP Client, PPPoE Client service DHCP, SNMP, NTP Client, Route Tracking, Ping Watchdog management HTTP(S) GUI, SSH, SNMP read, WNMS, Telnet tool Site Survey, Connection Test, Antenna Calibration Physical characteristics size 205 mm (length) × 205 mm (width) × 45 mm (height) weight 700 g installation Wall/steel pipe bracket power supply Equipment power supply 12 - 24V DC passive PoE (product comes with 24V passive PoE adapter) power supply 100 – 240V AC Power consumption 4.5 W surroundings temperature -40°C ~ +65°C humidity 0 ~ 90 % (non-condensing) management System monitoring SNMP v1/2c/3 service, system log, send alarms via Email and SNMP traps Regulation Certified Meets FCC/IC/CE standards
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Wireless video surveillance system has powerful user management functions, good compatibility, convenient scalability, distributed management and many other advantages. It also creates and inspires new industry application models in more and larger areas. Aquaculture wireless surveillance system wireless video surveillance can achieve such extraordinary development, thanks to the continuous application of network technology. Simply put, digital wireless monitoring is the conversion of traditional analog video signals into digital signals using microwave wireless transmission systems based on wireless LAN technology to send back video, audio and control signals.
one. Scene description
The user's use environment is an aquaculture site. In order to be able to view the actual situation of the farm in real time, a video surveillance camera is required to be installed around the farm. Since the area of ​​the lake is relatively large, it is difficult to carry out the erection of the cable, so the user is recommended to use it. My company's wireless transmission equipment. The wide water surface of the lake has a total of 26 cameras. The farthest camera is 2 kilometers away from the monitoring center. There are 19 cameras that can be integrated. There are 8 cameras that are about 200 meters away from the monitoring center.
Program:
19 cameras were respectively integrated into 6 groups, 6 5.8G digital devices SF5040G were used as the transmission, 2 SF5040G-W were equipped with a pair of angle antennas 3, and 7 other cameras were independently transmitted with 2.4G digital devices SF2414CH. SF2414CH-W with angle antenna pair 4 and a pair of 3 complete reception, transmission to the monitoring center. 
two. product description:
ST5040G Product Introduction SF5040G series digital wireless bridge is a long-distance outdoor wireless bridge with high cost performance. It works in 5GHz frequency band and adopts 2×2 MIMO technology. The maximum bandwidth is up to 300Mbps. The user interface is graphical and supports Chinese and English interfaces, facilitating the debugging and installation of engineering technicians at home and abroad. SF5040G built-in 18dBi dual-polarized flat antenna, high gain, large angle, transmission bandwidth up to 70~80Mbps at 6km distance. SF5040G-W is an external antenna device. In the application, an appropriate antenna can be added as required, and the transmission distance can be as long as 15km or more. In the bridge mode, point-to-multipoint supports 1-to-8 transfers, and the master can write 8 MAC addresses. Practical applications can be point-to-point, point-to-multipoint combinations. Its electrical interface is RJ45 interface, which mainly transmits TCP/IP network data flow, so it can transmit all signals based on network transmission in use: multimedia network data flow such as video, audio, and control.
SF5040G series products have a wide range of applications for information transmission between enterprises in various occasions - network connection between large enterprises and factories, office buildings, due to the expansion of the site requires the addition of factory warehouses, these buildings The cross-over is relatively large and inconvenient to route or require a lot of coordination work, where the transmission of high-bandwidth wireless information can quickly solve these problems. In many cases, wired lines are difficult to build, such as: historic buildings, old buildings, open areas, busy streets, hard-to-wire environments, large machinery, construction sites, mining areas, tunnels, mountain areas , no man's land, rivers, scenic spots, oil fields, etc., are not convenient for wiring, but it is also necessary to transmit network signals, monitoring signals or other multimedia signals.
Temporary workplaces—Offices, monitoring, and information transfer of temporary workplaces such as large-scale event venues, convention centers, construction sites, and disaster relief sites.
Frequent changes to the location of the environment - such as * sites for demand monitoring, such as * drills, construction sites, roads and bridges construction, etc., and frequent changes in location, using wireless forms to facilitate re-use without wasting the extension of the cable network - due to With regard to cost issues or actual environmental conditions, areas where the wired network is not laid or cannot be laid can be transmitted wirelessly.
For the backup of the wired network - For some important places, for the purpose of dual insurance, the link can be backed up in a wireless manner. Once a link is broken, the other link can immediately function.
Product parameters:
Product Model:SF2414CH 
SF-2414CH is a high performance, high stability 2.4GHz wireless bridge product. The product integrates an advanced 802.11n wireless core and 2x2 MIMO high-gain dual-polarization directional antenna. The operating system of the device is rich in functions, powerful in wireless communication optimization, and backward compatible with the 802.11b/g standard. The two long-distance nodes are used for effective network connection, and the full-distance bandwidth line-of-sight transmission distance can reach 3km, which can provide the quality of wireless transmission as much as the wired network quality.
The product uses IPoll (Intelligent Dynamic Polling Protocol) and has strong anti-interference ability. Even in areas with severe interference, 64-bit users can still secure access to the base station equipment. The device is equipped with dual firmware images. During a remote software upgrade, even if the power supply is interrupted and the upgrade fails, the device can still be restarted normally. The rugged shell made of polycarbonate plastic contains an ultraviolet inhibitor, which ensures that the shell will not be damaged by long-term exposure to outdoor sunlight.
SF-2414CH's product design and testing meet IP-65 protection level, vibration, temperature and humidity, salt spray and surge impact are in line with industry standards, with excellent reliability to ensure the high-end level in the same industry. The device is equipped with a ground lug and POE power ground protection to prevent lightning strikes.
The operating system of the SF-2414CH is a multi-functional, easy-to-use operating system that ensures that a full range of hardware devices can be easily configured during network deployment.
Main Features IPoll (Intelligent Dynamic Polling Protocol)
Supports Dual Firmware Mirroring New GUI Design Based on HTML5 Technology 170Mbps Transmission Capability 80,000PPS
Support IPv6
Compatible with WNMS
Application:
Construction sites, mining areas, water conservancy, oil fields, large-scale surface aquaculture sites, large-scale farms, forest fire prevention, * drills and other harsh environment HD video surveillance, multimedia signal transmission campus, large office space, shopping malls, hotels and other public places wireless Internet signal coverage buildings Between the network can transmit video, audio, network, data and other large-capacity data transmission parameter table
