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In the smart manhole cover, after the manhole cover with a trip switch or tilt sensor is stolen, the system will immediately send an alarm message. The management staff can open the mobile phone and can instantly view the exact position and abnormal status of the manhole cover on the electronic map. Arrange engineering staff to check and repair.
The sensor behind the smart manhole boosts the development of smart security
The Internet of Things connects all items to the Internet through information-sensing devices such as radio frequency identification and infrared sensors to realize intelligent identification and management. This is another revolution in the information industry following the computer, Internet, and mobile communication networks. Sensor technology It is one of the key technologies of the Internet of Things.
Early sensors were mainly shipped in security series and provided alarm functions. With the increase in the number of home appliances and electrical products, the sensors have increased the trigger source function in home automation, and the linkage with home appliances and electrical products has become mainstream. However, for the field of security, “preventing problems†is still the most important issue. Through the control of sensors at various nodes, it is beneficial for people to discover dangers and react mechanisms as soon as possible.
Tilt sensor
The tilt sensor has a wide range of applications in modern security. As a security element, the tilt sensor can automatically detect and send out an alarm when an abnormality occurs, so as to prevent the risk from further expansion.
The tilt sensor is mainly used to detect the level of the system. The dual-axis tilt sensor can measure the level in both directions at the same time, so it can be used to detect the level of the entire measured surface.
The tilting and swaying of the Ferris wheel pod in Shanghai Joy City in July 2016 was due to a failure of the tilt sensor, which caused the pod to tilt in one direction, triggering the pod security protection function.
In modern security, tilt sensors are mostly used in drones and smart well covers. In drones, tilt sensors integrate gyroscopes and accelerometers to provide flight control systems with data that maintains horizontal flight. These sensors and gyroscopes, combined with accelerometers, can measure subtle movements, allowing tilt sensors to be applied to mobiles. Programs such as gyroscope compensation for cars or drones.
In the smart manhole cover, after the manhole cover with a trip switch or tilt sensor is stolen, the system will immediately send an alarm message. The management staff can open the mobile phone and can instantly view the exact position and abnormal status of the manhole cover on the electronic map. Arrange engineering staff to check and repair.
Domestic application status: Compared with other sensors, the number is small, the field of science and technology is advanced, and the price is higher. Most of the domestic market in previous years was imported through foreign countries. With the input of R&D personnel, new steps have been taken in recent years. .
CMOS image sensor
It is reported that during 2015-2020, CMOS technology in sensing technology is expected to dominate the smart camera market for global security and surveillance applications. The main drivers of market growth in this technology include: CMOS image sensors are small and consume low power. Easy to integrate, faster frame rates, and lower costs.
With the continuous increase in the application of network cameras, CMOS image sensors will be widely used in high-definition surveillance, coupled with the CMOS image sensor R & D and production of more difficult reasons, have proven the market space and profit of CMOS image sensors huge.
For the security industry, the CMOS imaging sensor is the most familiar application for optical sensors. In the highly acclaimed field of augmented reality and virtual reality, many new applications of optical sensing technology have been achieved, and AR/VR technology and equipment upgrades have been promoted. As the global optical sensor market becomes more powerful, more and more machine vision devices use CMOS image sensors to monitor assembly lines or other automated processes.
Domestic application status: The application of CMOS image sensors is becoming more and more extensive. It can be used in security cameras to provide high-quality image sensors and high-dynamic-range video data. The overall market is moving in the direction of lower-cost solutions.
Radar sensor
With the rise of smart cities, traffic flow radars and 2D/3D multi-target tracking radars are also gaining popularity. In traffic engineering, speed is one of the basic and important data for measuring and evaluating road performance and traffic conditions. Radar sensors, as nerve ending sensors for rail transit equipment, can serve as an insurable technology for operational safety of rail transit equipment. It is also an ongoing upgrade of equipment. Key device technology.
On the other hand, one-third of the cars on the road have actually arrived at their destinations. They just wander around on the road to wait for a parking space. A series of problems such as pollution and traffic jams arise if they are on the streets of the city. Large-scale installations of sensor marshalling networks may ease this situation by helping drivers find parking spaces quickly.
Radar sensors play an important role in information gathering in the Internet of Things and respond to objects in a timely manner. They play a major role in the field of intelligent transportation. They are installed downward on street lights and on the walls of houses. Information obtained from these locations can be used. Accurately infer which areas still have parking. If the radar sensor is installed at a higher position, a wider area can be scanned, so it is easier to detect vehicles parked in a row.
Domestic application status: From the cost point of view, the medium- and long-distance radar module costs 60-120 dollars, short-medium distance 30-40 dollars, antenna & plate, RF front-end chip and background DSP signal processing cost accounts for 1/3 each.
At present, the millimeter-wave radar sensors assembled in domestic high-end and high-end automobiles all rely on imports, and the domestic R&D stage has basically been completed.
Conclusion
With the advent of the new technology revolution, the world began to enter the era of information intelligence. In the process of using information, the first thing to be solved is to obtain accurate and reliable information, and sensors are the main means and means for acquiring information in nature and production fields, and their role can not be underestimated. For the security industry, it is crucial to learn about dangerous information in advance and respond in a timely manner. Integrating with sensors to form intelligent applications will help accelerate the development of intelligent security and build a sound and safe city.