Application requirements
There is usually no 4G network in the tunnel, and GPS satellites cannot be searched.
From the perspective of safety production supervision, leaders need to see on-site videos, recordings, personnel positioning, etc. This is exactly the problem this program needs to solve.
System Features
When recording inside a tunnel without network, in an emergency, people can be sent out of the tunnel to manually upload the newly recorded video to the monitoring center platform for leadership review. Although there is a certain delay, it is a convenient and low-cost solution;
System Components
Intelligent video + positioning terminals such as smart helmets, combined with precise positioning modules such as UWB. AIoT is connected to all things, and smart helmets , smart helmets , helmet recorders , law enforcement recorders , vehicle-mounted DVR /NVR, ball control , smart glasses , smart flashlights , drone 4G supplementary transmission systems, etc. are unified and connected to large-scale integrated communication visual command Scheduling platform VMS/ smarteye .
Underground wireless communication network construction
A WiFi wireless network with no blind spots and full coverage is built in the tunnel to provide basic network services for all mobile terminals.
- Reliable communications: immunity to radio frequency interference. Ideal receiving sensitivity, wide range antenna provides powerful, reliable wireless transmission.
- Low cost: You can avoid the high cost of installing cables, the monthly fees for leased lines, and the expenses associated with the need for frequent moves, additions, and changes to equipment.
- Flexibility: Since there are no cable restrictions, you can add workstations or reconfigure workstations as you like.
- Mobility: Users can roam around the network as settings allow access to network data at any time and anywhere, rather than at a designated location.
- Quick installation: No construction permits are required, no trenches are dug, and wireless network installation takes a fraction of the time it takes to install a wired network.
- High throughput: Achievable data transmission rates of 11Mbps-866Mbps or higher (in the future), higher than T1 and E1 line rates.
- Protect user investment: Smooth upgrades to future technologies can be achieved without repeated investment in equipment replacement.
- Strong anti-interference: Anti-interference is one of the main characteristics of spread spectrum communication. For example, the signal spread width is 100 times. Narrowband jamming basically doesn't work. The intensity of broadband interference has been reduced by 100 times. If you want to maintain the original interference intensity, you need to increase the total power by 100 times, which is essentially difficult to achieve. Because signal reception requires spread spectrum coding and related despreading processing, even if the same type of signal is used for interference. Without knowing the spreading code of the signal, interference also has no effect due to the different correlations between different spreading codes. Because of the anti-interference properties of spread spectrum technology, the U.S. military widely used spread spectrum wireless bridges to connect computer networks distributed in different areas during the Gulf War and other places.
- Good concealment: Because the signal is spread over a wide frequency band, the power per unit bandwidth is very small, that is, the signal power spectral density is very low, the signal is submerged in the noise, and it is difficult for others to detect the existence of the signal. In addition, the spread spectrum coding is not known , it is difficult to pick up useful signals, and the extremely low power spectral density rarely causes interference to other telecommunications equipment.
- Anti-multipath interference: In wireless communications, the problem of anti-multipath has always been a difficult problem to solve. Using the correlation characteristics between spread spectrum codes, the receiving end can use related technologies to extract and separate the strongest interference from multipath signals. The useful signal can also be enhanced by adding the waveforms of the same code sequence from multiple paths, thereby achieving effective anti-multipath interference.
Integrated 5.8G base station
The integrated 5.8G base station is a high-performance, high-bandwidth, multi-functional, outdoor carrier-grade wireless device that supports the 802.11a/n standard. The device is based on the 802.11n MIMO (Multiple Input Multiple Output) technology and adopts 2T2R The architecture has a maximum transmit power of 1000mw and a maximum bandwidth of 300Mbps. It works in the 5.8G license-free frequency band and integrates a 5150-850MHz 18dBi dual-polarized antenna. It uses a 1000M Ethernet port design to maximize the potential of the 802.11n wireless protocol. . Mainly suitable for use in underground pipe gallery wireless coverage, positioning, robot main base station and other environments.
11AC protocol wireless base station, detailed technical parameters:
| Technical specifications |
DC 11AC wireless base station |
| radio frequency |
|
| frequency band |
4920～6100MHz |
| RF power output (EIRP) |
30dBm(max) |
| Sensitivity |
802.11n：-96dBm@6Mbps;-74dBm@300Mbps 802.11ac：-96dBm@MCS0;-72dBm@MCS9 |
| Modulation |
OFDM:BPSK，QPSK，16QAM，64QAM，256QAM |
| Data and operating parameters |
|
| Automatic rate selection |
IEEE802.11a：6/9/12/18/24/36/48/54Mbps IEEE802.11n：HT20 6.5/13/19.5/26/39/52/58.5/65/78/104/117/130/150Mbps IEEE802.11n：HT40 13.5/27/40.5/54/81/108/121.5/135/162/216/243/270/300Mbps IEEE802.11ac：HT80 65/130/195/260/390/520/585/650/780/866Mbps(MCS0～MCS9) |
| Support standards |
IEEE 802.11a/n/ac/d/h，IEEE 802.3d/u/ab etc. |
| Supported protocols |
TDMA,FAP,CSMA/CA，TCP/IP，IPX/SPX，NetBEUI 等 |
| manage |
|
| Operating mode |
Bridge、Station、Station-Bridge、Station-WDS、WDS-Slave等 |
| Device management/reset |
Supports Chinese/English tool management, effective immediately, no need to restart; supports hardware and software reset |
| Internet function |
Supports Vlan (802.1Q), DHCP, NAT (routing), firewall, virtual bridge, IPV6, packet analysis and filtering, precise traffic control (QOS), etc. |
| Network tools |
Support PTP throughput test, support packet capture function of each network interface (with analysis functions such as capturing source address, destination address, port number, protocol number, packet size, header content preview, etc.) Support Ping, traceroute routing tracking, support site and Use channel detection to support watchdog and other functions |
| Signal strength display |
5-level LED light display |
| Real-time data flow display |
Supports real-time display of throughput of each client |
| safety |
|
| MAC address control |
Support two-way MAC binding |
| Safety |
Support 40/104bit WEP; WPA/WPA2 PSK EAP encryption, private protocol encryption |
| 802.1x and Radius |
support |
| hardware |
|
| CPU |
720MHz |
| SDRAM |
128MB |
| LAN/WAN |
10/100/1000BASE-T RJ-45*1 |
| Antenna gain and angle |
5150～5850MHz 18dBi dual polarization antenna, vertical/horizontal angle 25 degrees/25 degrees |
| power supply |
DC 12～24V/1.5A; AC adapter AC 200～300V, Category 6 line remote power supply (POE) |
| Environmental and physical properties |
|
| Operating temperature |
-40～75℃ |
| Storage temperature |
-45～85℃ |
| Humidity (not concentrated) |
≤95% (non-condensing) |
| Overall dimensions (excluding bracket) |
268mm×268mm×78mm (length×width×height) |
| weight |
About 2.25Kg |
| Maximum power consumption |
12W |
| Installation and fixation |
L-shaped bracket matches U-shaped card; pole diameter: Φ30~55mm |
| special design |
IP67 protection level, windproof, sunproof, shockproof and heat dissipation design |
Network management server
The high-performance wireless management platform is one of its latest wireless bridge management and control devices. The network management platform is positioned as a centralized management device for large and medium-sized wireless network environments such as electric power, forest defense, water conservancy, ports, oil fields, coal mines, safe cities, etc. It can provide Gigabit network port wired access and be used with independent brand bridge equipment. It can meet the application of multiple scenarios of network bridging such as centralized platform management and control in large and medium-sized network bridge usage environments.
可针对无线桥接网络实现强大的集中管理和可视化界面操作，极大简化大型无线网络环境后期管理流程，灵活控制接入网桥的设备调试，配置的优化更改，优化覆盖效果和性能，同时对设备进行集群化管理，将设备的维护工作量降至最低。
产品内置各种管理功能，包括分类分组查看设备的监控状态，一键查看设备的电子地图，并且支持监控报警短信邮件通知功能，配合轻松实现无线的安全接入控制，不仅简化了整个网络的架构，而且还大幅降低了网络建设成本，满足了中小型无线网络建设中用户安全接入的需求。
无需部署桌面网管软件，即可实现对整个网络进行管理和监控。提供友好的 Web 管理界面，极大的解决了因终端在前端比较分散管理不方便及终端设备状态不明确造成宕机等问题、有效的提升优化了终端的性能，保证用户无论使用何种类型的终端，都能方便快捷的去管理前端所应用的无线设备，给用户良好的无线上网体验。
技术参数：
| 硬件参数 |
|
| CPU |
Intel Xeon E3 1230 V2四核八线程处理器 |
| 内存 |
DDR3 1333 4GB |
| 存储 |
16G |
| 扩展 |
支持PCI、Console口、USB扩展 （USB无线网卡、以太网卡、USB存储） |
| 以太网口 |
intel PCI-E 1000M 6 * 82574L |
| 吞吐量 |
udp 协议64byte测试下 78,500pps |
| 管理服务 |
AP工作状态、在线用户状态、电子地图规划、拓扑生成、安全报警、设备利用率等 |
| 带机量 |
≤500台 |
| 功能参数 |
|
| 设备监管 |
支持对网管设备的CPU、内存和存储占用的监控。 |
| 支持对所添加设备分组查看及流量控制 。 |
|
| 支持对网桥、AP、交换机的智能分组、分类。 |
|
| 支持局域网内导入电子地图。 |
|
| 支持网络拓扑结构。 |
|
| 终端监控 |
支持查看AP工作状态、在线用户状态。 |
| 支持黑白名单设置、MAC地址绑定。 |
|
| 支持网络中接收发送数据流量的实时监控。 |
|
| 支持电子地图规划导入、绘制网络拓扑。 |
|
| 支持 WEP、WPA-PSK、WPA2-PSK、混合加密。 |
|
| 安全防御 |
网管平台通过本地ip地址登录，保证只有管理员配置的ip地址才能登陆网管平台，增强网管的安全性。 |
| 支持所管理网络中流量数据包的监测、及异常数据包的统计处理。 |
|
| 报警处理 |
支持日志记录、安全报警及邮件、短信通知报警信息。 |
| 电源 |
|
| 供电 |
AC 100-240V |
| 功耗 |
≤150w |
| 物理 |
|
| 尺寸 |
430×250×45mm （重量：2.95kg） |
| 固定 |
标准1U上加机箱 |
| 存储 |
|
| 工作温度 |
-5～65℃ |
| 存储温度 |
-45～85℃ |
| 湿度 |
≤80％（非凝结） |
地下定位服务
UWB（推荐）
技术方案最成熟，应用最广，总体造价高。
UWB（Ultra-Wide-Band）是一种利用纳秒级的非正弦波窄脉冲传输数据的无线通信方式，该技术采用高带宽、快速脉冲的方式，具有优秀的穿透性和抗干扰性。
本定位系统采用TOF/TDOA算法，基于UWB测距技术与时间差定位技术，在实验室环境下，定位精度达到10cm以内；在普通环境下，定位精度依然能保持在30厘米以内。其中产品测距精度达到2.5厘米。
系统具有精度高、功耗低、成本低、易部署等优点，用于复杂环境下的人员、物品等高精准定位，解决基于一维、二维、三维场景下的精准定位需求。
在隧道定位系统中，人员或物品上所佩戴的定位标签利用UWB脉冲信号发射出位置数据，定位基站接收，通过信号飞行时间测算标签和基站的距离，然后定位引擎采集不同基站与标签的距离而计算出标签当前位置并实时展示出来（如下图所示）
说明：
1、一维定位适用于宽带方向比较窄的空间如走廊，隧道，管廊定位。
2、每隔300米内安装一个基站，定位精度小于30厘米。
3、基站与基站之间可以相互进行无线数据传输，免除网络布线等工作。
4、当遇到隧道或管廊有弯道或拐弯的地方，需要适当增加基站补偿。
5、在隧道/管廊入口出部署一台网关用来对基站回传的数据进行解析计算。
宽压工作范围：36VAC±50%
防护等级：IP67防护等级
工作温度：-30℃~+75℃
通信天线：外接高增益天线
运营升级：支持FOTA升级
数据回传：支持4G/以太网口、方便实现云端或本地化部署
WiFi定位
管廊内 无线设备配合定位专用服务器,可实现地下管廊设备、准确定位。全程可视化管理，实时位置大屏显示，管理更方便、直观，有效的提高工作效率和系统安全系数。
蓝牙AoA定位
使用蓝牙信标+蓝牙基站，总体造价高。
私有地图
可提供厂区CAD图进行转换，形成定制的专业地图，这个是收费业务。
终端
智能安全帽，头顶上的安全管家，工人的千里眼+顺风耳
电力抢修-铁路巡检-工地施工（远程点检）-4G图传-语音调度智能头盔安全帽，镜头角度可调，脱帽报警，安全生产智能化-精细化可视化监管，有防爆证，可扩展精准定位UWB、近电预警、人员考勤等，智能识别是否佩戴安全帽，是否穿着工作服，与各类头盔摄像头、4G记录仪、智能眼镜、智能手电、车载DVR、无人机4G补传等统一接入大型可视指挥调度平台VMS/smarteye，亦可通过加密芯片+B接口（或A接口）接入南瑞统一视频平台、继远电网平台、海康、华为千里眼等28181国标大平台。
防抖+防爆-超长摄录8小时-近电预警-脱帽-跌倒报警-三代4G视频智能安全帽BM800
语音遥控三代智能安全帽， https://v.douyin.com/enreAhH/ ， 智能安全帽，检测生命体征上报平台， https://v.douyin.com/e3oP4Yx/
业界首创国内唯一超过8小时超长连续工作.防抖智能安全帽-头盔摄像头，防抖效果杠杠的，https://v.douyin.com/ektaYoh/
智能安全帽有高中低三种产品系列：
- 纯定位安全帽，无摄像头，支持4G/2G网络/NBIOT，可扩展支持语音对讲、一键报警、跌倒、碰撞等平台报警；
- 无4G网络的单纯录像型安全帽，带摄像头，内置WiFi，可与手机配合接入调度平台，扩展定位、语音等功能；
- 全功能智能安全帽，安卓系统，4G/WiFi网络+定位轨迹+摄像头+语音对讲+报警等所有完整功能
4G工作记录仪
兼有颜值和实力的炫酷超固全国产芯片新一代炫酷超固型H.265 2.4寸屏 4G执法记录仪WZ224，https://www.besovideo.com/product/detail?i=82
视频演示，https://v.douyin.com/d6AWt1C/ ， 4G执法记录仪之间双向视频通话，类微信视频会议， https://v.douyin.com/ehbeY2a/
现场架高全局统揽-一体化布控球
钢丝+三脚架高高架起，走4G/5G网络实时回传到监控中心，光学变焦细节无所藏匿，180度旋转现场无死角，领导对工地现场情况一览无余，可快速做出决策。
A unified and integrated visual supervision platform VMS/smarteye
UWB-based high-precision personnel positioning system solution for digital coal yard, https://www.besovideo.com/detail?t=2&i=997
Bluetooth beacon for indoor positioning combined with smart helmet and power operation recorder of Android system, https://www.besovideo.com/detail?t=1&i=267
Test report of smart helmet with built-in RTK Beidou high-precision positioning (MQTT communication), https://www.besovideo.com/detail?t=1&i=132
Smart helmet with built-in UWB indoor high-precision positioning - software description, https://www.besovideo.com/detail?t=1&i=131