Source: Science and Technology Innovation Herald
The main function of a temperature sensor is to monitor and transmit temperature data of objects,which ensures the quality of objects or products, and plays an important role in energy conservation and safe production. With the development and demands of science and technology, traditional temperature sensors have gradually exposed their shortcomings, as the complexity of wiring and limitations in transmission distance often hinder the smooth operation of temperature sensors. In recent years, wireless temperature sensors have begun to come into the public eye, and are gradually being applied on a large scale.Wireless temperature sensors have improved upon the deficiencies of traditional temperature sensors, especially those based on WiFi technology (hereinafter referred to as “WiFi temperature sensors”). They require no wiring, have a compact size and a simple installation process, and are no longer limited by transmission distance, while being safe and reliable, these advantages have made WiFi temperature sensors rapidly popular. Next, I will introduce this advanced and convenient temperature sensor from three aspects.1 Working Principle1.1 Hardware AspectsWiFi temperature sensors mainly consist of three major components, the communication transmission module, real-time sending function, and digital temperature sensor. As we all know, WiFi has the characteristic of being distance-independent for transmission, which provides a significant advantage in communication. The main function of the temperature sensor is to monitor temperature and transmit temperature data, using WiFi technology to transmit temperature data to a computer or mobile terminal, which greatly enhances the efficiency of the sensor, allowing operators to not have to constantly monitor the sensor, but only to receive information at the receiving end, and then take appropriate actions based on temperature changes of the monitored object. Since operators cannot always be next to the WiFi temperature sensor, the real-time sending function plays a crucial role in understanding temperature changes of the monitored object. By setting an interval time in the temperature sensor, operators can make corresponding adjustments based on the received data, thus avoiding the hassle of manually checking the sensor. If temperature data is not received within several sending intervals, it indicates that there is a problem with the system. Due to data transmission limitations, traditional temperature sensors cannot adequately fulfill the requirements, therefore, the most important hardware facility in the combination of WiFi technology-based temperature sensors— the temperature sensor, is generally a digital temperature sensor. Digital temperature sensors can directly read the temperature values of the monitored object, and have almost no limitations, being compact and easy to use. Through WiFi transmission, terminals can receive data in a timely manner.1.2 Software Aspects In addition to the three major hardware components, WiFi temperature sensors also have strict requirements in software aspects, mainly focusing on programming, data collection, and security. The programming tool used in the WiFi temperature sensor system is mainly C language, which is a common computer programming language, allowing for flexible and convenient program writing, with a relatively free design, and a wide range of calculations. Using C language programming in WiFi temperature sensors, makes it more convenient to utilize the function library in the system program, and can be adjusted according to needs, to respond to emergencies. In terms of data collection, the temperature sensor needs to undergo a period of power initialization, and then configure with the WiFi communication transmission module, only after successful configuration can it receive the transmitted temperature data, and then convert the format according to program requirements to send to the terminal.2 Current Application Status Since the late 1990s, countries in Europe and America, led by the United States, have begun to focus on researching wireless temperature sensors, with many sensors during this period being applied in military fields. Entering the 21st century, many universities in Europe and America have conducted in-depth research on data transmission and operating systems of temperature sensors, achieving good results. Subsequently, with the continuous exchange of scientific and technological advancements between countries, wireless temperature sensors have begun to gain popularity in Asia. In the early 21st century, our country also began research on these wireless temperature sensors. Many universities in China have not only established relevant laboratories, but have also started to research related projects in the field of wireless sensors, achieving a series of results. It is evident that, wireless temperature sensors are an emerging technology, and a necessary trend. Especially the WiFi temperature sensors, have brought significant changes to people’s production and lives. According to surveys, currently, WiFi temperature sensors are mainly applied in environmental protection, medical care, military defense, and other fields.2.1 Environmental Protection With the continuous progress and development of society, people’s requirements for the environment are becoming increasingly high, and protecting the environment has become one of the most concerning topics worldwide. Using WiFi temperature sensors, one can understand the temperature changes of soil, atmosphere, and forests, and also monitor temperature changes in polluted areas, and even understand animal migration and survival habits through temperature data, or changes in the growth environment of plants. This has made an extremely important contribution to environmental research.2.2 Medical Care The advantage of WiFi temperature sensors over ordinary temperature sensors is that they do not require constant human monitoring, allowing one to understand the temperature changes of monitored objects through terminals. This is particularly applicable in the field of medical care, where WiFi temperature sensors can be used to continuously monitor patient conditions, especially in isolation wards, which can reduce the burden on medical staff, and also decrease the frequency of entering and exiting the ward, avoiding potential infections. This type of temperature sensor can also enter daily life, helping the elderly or disabled individuals monitor their temperature, improving home life.2.3 Military Defense In the field of military defense, WiFi temperature sensors can be used to monitor temperature changes around the battlefield, to make timely responses. Additionally, since 2001, the issue of “anti-terrorism” has been a significant concern for many countries, and an effective defense system can effectively prevent an attack from occurring. In defense systems, WiFi temperature sensors can also play an important role, such as monitoring the surrounding environment, collecting data information, etc., to respond to emergencies. Of course, in modern society, the application fields of WiFi temperature sensors are not limited to the above three, as they also perform prominently in food safety, energy exploration, industrial manufacturing, transportation operations, and more.3 Future Prospects Currently, WiFi temperature sensors are developing towards greater precision, safety, and multifunctionality, based on scientific and technological foundations, forming a wireless temperature sensor network, making temperature monitoring increasingly convenient. More and more fields are beginning to use WiFi temperature sensors, thus they have a huge market prospect, especially in applications within high-speed trains. With the continuous improvement of transportation methods, taking high-speed trains has become a common choice for modern travel. While speed increases, the safety issues of high-speed trains are receiving more attention from the public. During high-speed operation, various data from the trains can reflect safety issues, and temperature monitoring has become a key focus among these data. Using WiFi temperature sensors to collect and transmit temperature change data in high-speed trains, can better monitor the operational status of the trains, ensuring their safety. However, WiFi temperature sensors also have shortcomings. The instability of WiFi may become a variable affecting the normal data transmission of temperature sensors. In future technological developments, WiFi temperature sensors need to increase signal coverage, save energy, and reduce costs, to pave the way for widespread application across various fields.4 Conclusion Temperature sensors based on WiFi technology, through the comprehensive operation of their hardware and software, can provide more convenience for people’s lives. Their application range is very broad, not only reflected in environmental, medical, military, and other fields, but also extending to other areas. Currently, temperature sensors based on WiFi technology have great prospects, promoting the development of modern technological products, especially in ensuring the safe operation of high-speed trains, where they can play a monitoring role.
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