Quickly switch wireless transmission by moving data

With the development of society and technology, many industries have realized the replacement of traditional manual operations with intelligent robots, thereby improving work efficiency and reducing operating costs. For example, the traditional inspection of the power industry is done manually, and generally requires two people to complete the work. However, if the intelligent inspection robot realizes the whole process of unmanned detection, the manual inspection frequency can be reduced, and the manual workload can be reduced. In the peak period, it can also increase the frequency of inspections and improve the efficiency of protection. There are more industries, such as security patrols, pipe gallery inspections, driving school exams, tunnel commuter monitoring, and driverless driving. These are all needed to transmit the real-time signal of the terminal to the central platform through wireless transmission. However, the traditional carrier network transmits signals with high cost, and sometimes the transmission data is not timely due to the poor coverage of the network. Make an impact. Therefore, how to realize the real-time and timely transmission of data to the back-end platform is a difficult problem to be solved.

From the solution point of view, it is a more feasible way to achieve these goals through self-built wireless transmission networks. However, from the project situation that the author has personally experienced, many users use the traditional wireless network transmission mode for the first time. After repeated tests, the general conclusions are summarized: the coverage distance is short, the effective bandwidth is low, and the signal loss for a plurality of base stations is up to nearly one minute, and the signal is unstable. These situations cause the back-end center to lose control of the intelligent terminal, which is likely to cause losses due to accidents. So what is the problem that causes these phenomena? The traditional wireless network coverage device is designed primarily based on coverage, and the so-called wireless roaming function is only based on wds bridge, and does not have automatic signal switching mechanism. Just speed up scanning the surrounding signal after the signal is lost, and then quickly in the fast link, which obviously does not meet the demand for video that requires real-time transmission. Wireless coverage is also unattainable for the simultaneous transmission of multiple HD signals.

To meet these wireless transmissions, only wireless transmission equipment with good wireless networking functions and fast wireless switching mechanisms can be realized. The high-speed mobile non-sense roaming networking switching device is a kind of targeted development of wireless video equipment for the industry. The self-radio power is higher than that of the traditional wireless coverage equipment, and the effective coverage distance can be up to 2 kilometers. The software design mainly focuses on how mobile communication between the mobile terminal and the base station can ensure signal stability. The main design point is located in the terminal mode, and the switching mechanism is automatically turned on or started by the signal strength software. For example, the signal cut-off threshold of the terminal is -55 dbm, and the switching signal is -70 dbm. The principle is that the signal value of the communication between the terminal and the previous base station is within -55 dbm, and the terminal and the upper base station communicate normally. When the signal is lower than -55 dbm, the terminal starts scanning the next-level base station signal, and after scanning the next base station signal, the terminal establishes a wireless link with the next-level base station. At this time, the terminal has already established a signal link with the two-stage base station. If the signal communication between the terminal and the upper-level base station drops to -70 dbm, the terminal automatically disconnects the wireless link from the upper-level base station and continues to communicate with the next-level base station. This switching mechanism can adjust the appropriate signal threshold by testing several times in the field to ensure stable operation of the system. Finally, the video, data, etc. of the smart terminal can be stably communicated with the center.

Equipment recommendation:

Our LA-850A series wireless fast switching base station equipment utilizes the power of LA-850A to effectively cover the advantage of long distance. The fast non-inductive switching function realizes high-speed switching between various points in the tunnel. The base station and the control center can establish wired link communication through the optical fiber. If the site does not have access to the optical network, the base station and the control center can also be realized through various wireless transmission modes such as point-to-point, point-to-multipoint, and wireless ad hoc network transmission. Communication between,

LA-850A features

1. High power, LA-850A high power output 30dBm, can still guarantee 3% high EVM value at maximum power.

2, wide voltage, LA-850A supports 9-48V ultra-wide voltage support, while supporting battery, standard and non-standard POE power supply, greatly simplifying installation complexity.

3, the communication distance is far, the use of supporting omnidirectional antenna can reach more than 2 kilometers effective communication distance, greatly reducing the overall cost and construction difficulty.

4, millisecond-level switching speed, the average delay of the LA-850A switching base station is 35 milliseconds, and the ping has no packet loss at all.

5, cross-channel work, the base station can choose different channels, the car-side can be switched across channels, the same number of base stations can greatly provide the entire system capacity.

6. Intelligent learning, the vehicle end will automatically learn the current driving switching path automatically, and will preferentially detect the previously learned path before preparing for switching, thereby improving the switching efficiency.

7. Simple to use, the LA-850A has a large number of real-world measured conditions, and a large number of optimized parameters and real-time measurement functions are built in. Only a small number of parameters that need to be set according to the environment are adjusted by the user through WEB, which greatly reduces the difficulty of on-site debugging. With a basic wireless foundation, you can complete the installation and commissioning without the need for a professional.

8, highly customized, LA-850A supports both base station and vehicle use, just modify the working mode, and the operation settings are simple.