Brand new original Hitachi air cooler screw chiller machine sensor THM G7D01299F
Sensor is a kind of detection device of Bai,
which can sense the measured information of Du, and transform the sensed information into electrical signal or other required information output according to certain rules, so as to meet the requirements of information transmission, processing, storage, display, recording and control. The national standard gb7665-87 defines a sensor as "a device or device that can sense the specified measured part and convert it into usable signal according to certain rules (mathematical function rule), which is usually composed of sensitive element and conversion element".
The characteristics of sensors include: miniaturization, digitization, intelligence, multi-function, systematization and networking. It is the first step to realize automatic detection and automatic control. The existence and development of sensors, so that objects have the sense of touch, taste and smell, so that objects slowly become alive. Generally, according to their basic sensing functions, they can be divided into ten categories: thermal sensors, photosensitive elements, gas sensors, force sensors, magnetic sensors, humidity sensors, acoustic sensors, radiation sensors, color sensors and taste sensors.
The function of the sensor:
In order to obtain information from the outside world, people must rely on the sense organs. However, it is far from enough to rely on people's own sensory organs in the study of natural phenomena and laws and production activities. In order to adapt to this situation, sensors are needed. Therefore, it can be said that the sensor is the extension of human facial features, also known as electrical facial features.
With the advent of the new technological revolution, the world has entered the information age. In the process of using information, the first thing to solve is to obtain accurate and reliable information, and sensor is the main way to obtain information in the field of nature and production.
In modern industrial production, especially in the process of automatic production, various sensors should be used to monitor and control various parameters in the production process, so as to make the equipment work in the normal or optimal state, and make the products reach the best quality. Therefore, it can be said that without many excellent sensors, the foundation of modern production will be lost.
In the basic subject research, sensors have a more prominent position. The development of modern science and technology has entered many new fields: for example, we should observe the vast universe of thousands of light years at the macro level, the particle world as small as FM at the micro level, and the evolution of celestial bodies as long as hundreds of thousands of years in the vertical direction, as short as the instantaneous response of S. In addition, a variety of extreme technologies, such as ultra-high temperature, ultra-low temperature, ultra-high pressure, ultra-high vacuum, ultra-high magnetic field, ultra-weak magnetic field and so on, which are important for deepening material understanding and developing new energy and new materials. Obviously, it is impossible to obtain a large amount of information that can not be directly obtained by human senses without appropriate sensors. The obstacle of many basic scientific research lies in the difficulty in obtaining the object information. Some new mechanisms and high sensitivity detection sensors often lead to breakthroughs in this field. The development of
some sensors is often a pioneer in the development of some marginal disciplines.
Sensors have already penetrated into such extensive fields as industrial production, space development, ocean exploration, environmental protection, resource investigation, medical diagnosis, bioengineering, and even cultural relics protection. It is no exaggeration to say that from the vast space to the vast ocean, to all kinds of complex engineering systems, almost every modern project is inseparable from all kinds of sensors.
Therefore, the important role of sensor technology in the development of economy and social progress is very obvious. All countries in the world attach great importance to the development of this field. It is believed that in the near future, sensor technology will take a leap and reach a new level commensurate with its important position.
