Why has the near-infrared field remained underdeveloped?
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Although I have been working in the instrumentation field for over a decade, I had no prior exposure to near-infrared products and related knowledge. Recently, I began to learn about near-infrared light due to customer requests; it is widely used in laboratories, but its application in online settings has remained modest. It turns out that there are very few options available domestically; imported sets cost four to five hundred thousand yuan each, and this is likely the main reason for the limited use of such online applications. Laboratories, on the other hand, have no choice but to use them. I hope that domestic products will thrive soon, enabling near-infrared online detection to become available to ordinary people – this market has tremendous potential.
The commonly used measurement principle of infrared temperature sensing currently limits the possibility of large-scale online applications. Infrared temperature measurement actually involves detecting the light emitted by an object’s surface; this means it is unable to measure the temperature inside a medium, and can only determine the temperature of the object’s surface or interfaces. For example, to measure gas temperature, a target must be placed at the location being measured in order to sense the temperature; the gas temperature is determined by measuring the temperature of this target ； Similarly, for the medium inside a pipe, only the temperature of the outer surface of the pipe can be measured ； It is difficult to establish a temperature scale for infrared temperature measurement; unlike thermocouples and thermal resistors, for which the relationship between temperature and output can be determined once the physical properties of the material are known. In early infrared temperature measurement, it was even necessary to inject liquid nitrogen or dry ice into the instrument in order to obtain a reference temperature ； By establishing a measurement channel, it is possible to measure the internal temperature of an object using infrared radiation, but this eliminates the advantage of non-contact infrared measurement. In fact, in industries such as metallurgy and heat treatment, the online use of infrared thermometers is quite widespread. It’s just not used very often in the chemical industry.
What parameters do you need to measure using near-infrared technology? Temperature, material properties, or online concentration measurement? Nowadays, there are more accurate Raman-based methods for concentration measurement
Are there any experts in near-infrared online mixing?
Infrared sensors are still used relatively rarely. Since they are used for measuring surface temperatures, strict requirements are imposed on both the operating conditions and the environment; as a result, there are deviations in the measured temperatures. Moreover, the technology in this area is not yet mature in China, and people tend to believe that thermal resistors and thermocouples are more accurate, which is why infrared sensors are used less often
The price and market conditions mean it’s not very popular, but it’s acceptable in some niche industries. At present, European and American high-end companies such as Brook, ABB, Fox (acquired by Schneider Electric), and AIT hold a monopoly in this field.
Our group company has developed near-infrared online analyzers, which generally cost around seven or eight hundred thousand
The near-infrared referred to by the poster isn’t infrared temperature measurement; it should be a near-infrared analyzer, which is used for analysis at the molecular level, through spectral analysis. Molecular-level analysis of materials is carried out through spectroscopy and modeling.
This post was last edited by qugd on 2019-6-16 08:55. Those who immediately mention infrared temperature measurement either didn’t understand the original poster’s message or simply act like idiots, spouting nonsense whatever they see. Those who say that infrared technology can be used for temperature measurement in this section had better first understand what near-infrared spectroscopy is and what it is used for. Don’t start by saying something silly like “measuring temperature” – it makes you seem completely unprofessional. Near-infrared spectroscopy, particularly Fourier-transform near-infrared spectroscopy, is a highly specialized technique for infrared spectral analysis. It can be applied in various fields of analysis, and it is also useful for monitoring chemical reactions as well as ensuring product quality. Petroleum blending is just one of the minor applications. It can be applied in areas such as pharmaceuticals, food, organic chemical reactions, quality control of polymer properties, identification of products or varieties, and quality monitoring of agricultural products. However, the specific applications of near-infrared spectroscopy are based on chemometrics, and it is necessary to use specialized software to establish and train the spectral measurement models; this constitutes a technical constraint that limits its use among many users. Near-infrared spectroscopy can be considered a universal analytical technique, but it does require the user to possess certain technical expertise. It also demands close cooperation from instrument manufacturers, as well as regular optimization and upgrading of the analysis models – it is a process of interaction between humans and machines.
Some idiots just show up and spout nonsense without even reading what the original poster is saying.