Shulou(Shulou.com)06/01 Report--

eSIM+NB-IOT How to solve the pain point problem of intelligent manhole cover application in multiple scenarios, I believe many inexperienced people are helpless about this, so this article summarizes the causes and solutions of the problem, through this article I hope you can solve this problem.

In recent years, urbanization has produced a large number of inspection wells, involving gas, heating, water supply, rainwater, sewage, reclaimed water, electricity, lighting, communications, transportation, public security, radio and television and many other industries, widely distributed in the major ring roads, trunk roads. A provincial capital city has about 2 million wells, a city has about 500,000 wells, and a county town has 50,000 wells. At the same time, well cover management is also faced with loss, displacement, damage monitoring and other difficulties. Therefore, how to solve so many well cover management will be a difficult problem for smart cities.

Intelligent manhole cover can solve the above management problems well, but at present, due to a series of reasons such as environmental factors, safety requirements, and high cost, there has been no large-scale large-scale layout. Due to the inability to take electricity underground, inspection well covers are mostly made of metal (cast iron), which has a great shielding effect on signals. Many existing solutions are based on 2G M2M modules, which basically cannot communicate when the metal manhole cover is closed (unless there is a base station within 50m of the manhole cover), and only when the manhole cover is opened can the signal be transmitted. In addition, the communication power consumption of the 2G module is high. If the alarm times are many or the manhole cover is opened for a long time, the terminal battery is easily exhausted; if the manhole cover is not opened, the background cannot know the working status of the terminal. If the terminal battery is exhausted or the program crashes (any electronic product may appear) or even the terminal falls off, the staff will not know it. At this time, if the manhole cover is opened, the terminal cannot send alarm information to the manager.

With the maturity of NB-IoT technology and eSIM technology, the above problems such as power consumption, signal strength and complex environment can be solved well. In 2018, the commercial deployment of NB-IoT in the country will be fully promoted. By 2020, the scale of NB-IoT base stations will reach 1.5 million, and the total number of connections will exceed 600 million.

The Huijing well cover monitoring terminal monitors the water level information, temperature information and well cover status information (opening and closing, loosening, etc.) under the well cover, and transmits the information to the cloud platform.

According to the application scenario of intelligent manhole cover system, the equipment terminal needs to have the following characteristics:

1. Smaller and easier to install. Only one terminal needs to be installed on the back of the existing manhole cover, no wiring is needed, and no base station needs to be built.

2. Low power consumption, equipment operating time generally takes more than 1 year.

3. Three-proof properties, appearance seal, corrosion resistance, wear resistance, pressure resistance, shock resistance, waterproof.

4. Dormancy requirements, the terminal only sends alarm information to the cloud when it encounters abnormal manhole cover, only uplink communication.

According to the above characteristics, NB+eSIM technology can fully meet the needs of this industry scenario.

First,NB-IoT is built on cellular networks, and operators deploy base stations. No user networking, maintenance.

Secondly, eSIM technology does not need to install an external SIM card slot, it can fully seal the terminal equipment, small size, waterproof, corrosion resistance, no need to worry about the problem of poor card contact caused by vibration.

Finally, compared with traditional external cards, eSIM technology can reduce device power consumption. With NB-IOT communication module, power consumption can be further reduced in PSM mode.(5000mAh) battery life can exceed 10 years. Usually, the terminal module equipment on the manhole cover sleeps. When the manhole cover triggers an alarm abnormally, it is awakened and sends an alarm signal to the cloud. When the environment returns to normal, the module continues to sleep.

After reading the above content, do you know how eSIM+NB-IOT solves the pain point problem of intelligent manhole cover application in multiple scenarios? If you still want to learn more skills or want to know more related content, welcome to pay attention to the industry information channel, thank you for reading!

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