On the afternoon of November 6th, Gu was sitting in the waiting room of China Eastern Airlines at Xi'an Xianyang Airport, awaiting a flight to Wuxi. With some spare time available, he brewed a cup of black tea, settled on the sofa, and picked up his mobile phone to compose the 126th installment of “Divine Talk and Casual Chat about Sensors”.

      Yesterday, together with Director Wei, the director of the IOT of our company, we journeyed to Tongchuan City, which is about 50 kilometers directly north of Xi'an. There, we visited General Manager Huo of Tongchuan Mobile Company who has been in office for less than three months. When Huo was at the headquarters of Shaanxi Mobile before, he was in charge of the province's Internet of Things business. Under the leadership of General Manager Zhou and General Manager Shi of Shaanxi Mobile Group Company, we jointly established the Shaanxi Internet of Things Public Laboratory along with the Shaanxi Internet of Things Industry Alliance and China Mobile Internet of Things Company, providing Internet of Things hardware testing services for companies across the country that need to test NBIoT hardware.       General Huo, newly appointed, is brimming with vitality and confidence. He is determined to work hard in Tongchuan Mobile to jointly build an innovative platform for the smart city's digital economy with the Tongchuan government. I wish General Huo can achieve remarkable results. #Waiting room of China Eastern Airlines at Xianyang Airport at 16:50 on November 8, 2024#

      In Tongchuan, while having a simple lunch, we happened to encounter Director Zeng, the director of network management of Shaanxi Mobile. During the chat, we learned that network management is not only responsible for managing server rooms but also manhole covers on roads and optical distribution boxes on street sides, ensuring the network security and smoothness of the whole province. I have known Director Zeng for a long time, yet I didn't realize that our manhole cover movement sensor could be integrated with their business. He was unaware that we are producing manhole cover movement sensors. Although we set up a smart park project at the headquarters of Shaanxi Mobile Group quite early, which naturally includes wireless intelligent manhole cover movement sensors. Large companies are indeed complex in organization and have a large number of personnel. At the same time, it also indicates that our promotion and sales efforts are insufficient.

(Wireless manhole cover movement sensor being produced on the production line of Xi'an Chinastar M&C Ltd.)

       Since Xi'an Chinastar M&C Ltd. installed 30 sets of wireless manhole cover movement sensors and system platforms based on 2G communication on a trial basis in Xi'an High-tech Zone in 2012 (presumably the company that first developed and produced manhole cover movement sensors in China), it has been dedicated to developing various wireless manhole cover movement sensors from the perspective of urban safety and efficient management.        Functionally, from single-function detection of vertical movement, horizontal movement, and tilt of a single manhole cover to two-in-one products of manhole cover movement plus underground water level detection, and then to two-in-one and three-in-one products such as manhole cover movement plus combustible gas leakage detection, new products are continuously emerging. Customized products can also be made according to the needs of special users, like double-layer manhole covers and power manhole covers.       In terms of communication, it has evolved from the initial single 2G communication to 3G, 4G, NB communication, and   LoRa wireless communication mode. The frequency band must comply with Chinese standards as well as European standards. Of course, the United States now has stricter requirements and more complications.       By continuously optimizing the power-saving mode and management system, the durable life of the battery has increased from one year at the outset to three to five years now, and in some places it can even reach seven years.

      The shell design is also constantly improved to better match the mechanical characteristics of the application site. The waterproof and protection level can reach the international standard of IP67. Installation methods allow different customers to choose different brackets according to their own requirements.

       With continuous optimization of design and expansion of scale, costs are continuously reduced.

(Xi'an Chinastar M&C Ltd. participated in the Internet of Things exhibition in the US in June 2024. The intelligent manhole cover system was interviewed and reported by the English channel of China Radio International.)

      At the same time, we also discussed that energy-saving management of large computer rooms will definitely involve temperature sensors and humidity sensors. In some places, wind direction sensors and wind force sensors will also be used. Experts are aware that energy saving of large computer rooms is a very important energy-saving aspect for operators and an important sign of communication moving towards green. I hope experts with such technologies can contact Gu. Let's discuss together how to promote this topic.      The flight MU2782 from Xi'an to Wuxi is delayed again. The plane originally scheduled to take off at 17:25 is still waiting in the cabin at 18:10. This short article written without much in-depth thought for a day comes to an end here. #MU2782 at 18:12 on November 8, 2024#