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The new crown epidemic has brought physical pain and inconvenience to human beings, making nucleic acids, masks, and health codes the normal state of life. In special seasons, it has also spawned the rapid development of some industries in disguise, such as the medical industry IVD nucleic acid Testing, telemedicine, and online drug purchases are booming; in the e-commerce industry, community group purchases and logistics and express delivery have doubled; and in the IoT industry, 5G infrared thermal imaging, face temperature measurement access control, electronic sentinels, and NB smart door sensors Scientific and technological means such as big data monitoring of people flow and vehicle flow are widely used in the front line of government and enterprise epidemic prevention and anti-epidemic.

Information technology has become an important tool for realizing "dynamic clearing" and "smart epidemic prevention" in China. In personnel data collection, intelligent flow management, and accurate monitoring of dynamic trajectories, NB-IoT epidemic prevention door magnetics play a pivotal role.

The "spring" of NB-IoT smart door sensor

The smart door sensor is a smart door opening and closing status monitoring device based on the NB-IoT cellular mobile Internet of Things connection technology. It consists of a sensor (accessory) and an NB-IoT communication transmitter (host). On both sides of the doors and windows, when there is a separation action, the supervisor can receive text messages and voice alarm notifications, also known as "electronic seals" in the industry. The intelligent door sensor device is equipped with a background management and control system, with the functions of "open alarm", "overtime alarm" and "people flow statistics". Using big data and pan-sensing technology, it can realize statistical analysis of the activity track and dynamic situation of the people who stay at home.

Currently NB-IoT door magnets are often used in the following scenarios:

One is for hotels, families and communities that need to be isolated. The NB-IoT smart door sensor can realize accurate monitoring of the opening and closing status of the door. Once the isolation occurs illegally opening the door and going out, the background will immediately generate a warning and push it to the administrator's mobile phone, which greatly improves the work efficiency of personnel entry and exit epidemic prevention supervision. The information and quarantine period are clear at a glance. Today, it has been applied in many provinces and cities across the country, such as Beijing, Shanghai, Guangzhou, Shenzhen, Jiangsu, Zhejiang and Hunan.

Second, in the closed management park community, doors and windows that need to be temporarily closed but cannot be completely closed. For example, 24-hour access, stair doors, escape passages, etc., turn on the do-not-disturb mode when there is a large flow of people, and turn on the abnormal door opening and closing reminder during the control time, which can realize unmanned and simplified management, and help the stationed personnel to achieve accurate monitoring from the background. and arming.

NB-IoT smart door magnetic has the following characteristics:

1. Universal operator network, wireless networking, lightweight deployment and easy installation;

2. The signal is stable, the power consumption is low, and it can be recycled;

3. Open the door to report, real-time alarm, support mobile and PC cloud management;

With the advantages of convenient and easy installation and real-time management, NB-IoT smart door sensor is particularly prominent in the needs of grassroots epidemic prevention.

NB-IoT door magnetic market: traditional manufacturers are mostly, local demand hits a new high

The NB-IoT smart door sensor has already appeared a relatively mature solution in 2020 at the beginning of the outbreak. With the nationwide spread of the current round of the epidemic in mid-to-late February, the government's demand for intelligent epidemic prevention and resumption of work and production is currently in the market. During the epidemic, NB-IoT door magnets experienced a certain degree of shortage of supply and doubled prices, and it is expected that the phenomenon of shortages and rising supply prices will continue until the end of March.

According to the analysis of the industrial and commercial information of Qichacha, half of the enterprises operating smart door magnets are located in Guangdong, and the top five regions in terms of enterprise distribution are Guangdong, Zhejiang, Jiangsu, Shandong and Anhui. Guangdong Province has become a major output province of NB-IoT door sensors.

At present, most of the NB-IoT door sensor manufacturers in the market are traditional security alarm companies, with the accumulation of security technology and user needs, such as Hangzhou Hikvision, Shenzhen Ailian, Shenzhen Yelang Security, Rui Shida, Hyman, Shenzhen Essence Long, Shenzhen Mei'an Technology, Shenzhen Pilot TV, Langxin Intelligent, Shenzhen Haon, Shenzhen Lion King and other enterprises.

In addition, Tianyi Internet of Things, China Mobile Internet of Things, China Unicom Digital Technology, and home appliance company TCL, which are owned by established operators China Telecom, have also developed and deployed NB-IoT smart door sensors through self-research cooperation and other forms.

Looking at IoT trends from door magnetism: traditional industries are intelligent, and scenarios are diversified

Under the wave of smart cities and digitalization, traditional security brands have shown strong competitiveness, and product production lines have gradually changed to intelligent. From traditional door locks to smart security, and then to security monitoring, the smart home security industry represented by IoT anti-epidemic door sensors is fully integrated into life and consumption scenarios. The systematization of data collection - communication technology - cloud management platform function integration has also become the basic trend of the Internet of Things in traditional industries.

With the normalization of the epidemic, the Internet of Things technology for epidemic prevention will continue to iterate, and more epidemic prevention IoT products will emerge, and the scenarios will also be extended in multiple ways. For example, the original application of NB-IoT anti-epidemic door magnets is mostly in nursing homes, office buildings, apartment management, etc. In this way, the same system solution is applied to many different scenarios, so that IoT products can be extended to the diversification of anti-epidemic scenarios. The development trend of the Internet of Things industry.