Basic knowledge of automatic instrument detection technology

Abstract: The basic knowledge information of automatic instrument detection technology is provided by excellent flowmeter and flowmeter manufacturers. 1. Industrial process inspection Industrial process inspection refers to the qualitative inspection and quantitative measurement of some of them in the production process in order to grasp the production situation and monitor and control the production process in time. The purpose of detection is to obtain the index value of each process. For more flowmeter manufacturers to select models and price quotations, you are welcome to inquire. The following is the details of the basic common sense article of automatic instrument detection technology. 1. Industrial process inspection Industrial process inspection refers to the qualitative inspection and quantitative measurement of some of them in the production process in order to grasp the production situation and monitor and control the production process in time. The purpose of detection is to obtain information on the index values ​​of each process. According to the detection results, the variables affecting the process conditions can be automatically adjusted or manipulated to achieve the purposes of improving quality, reducing costs, saving energy, reducing pollution and safety in production. Detection technology involves a wide range of content, including the acquisition, conversion, display of the detected information, and the processing of side data. With the continuous progress of science and technology, especially with the development of high-tech such as microelectronics technology and computer technology, as well as the continuous emergence of new materials and new processes, detection technology is also constantly developing, and has become a practical and comprehensive A strong emerging discipline. As an important means and tool for human beings to understand the objective world, detection technology and instrumentation have a wide range of application fields, and industrial process is one of its most important application fields. Industrial process detection has the following characteristics: (1) The objects to be tested have various shapes. There are gaseous, liquid, solid media and their mixtures. Some of the measured objects have special properties (such as strong corrosion, strong radiation, high pressure, high pressure, cryogenic, vacuum, high drilling, high-speed motion, etc.). (2) The nature of the measured parameters is diverse. There are thermal processes such as temperature, pressure, flow rate, liquid level, etc., as well as various mechanical quantities, electrical quantities, chemical symbols, biological sites, and special parameters (such as pulp beating degree) that are required to be inspected in some industrial processes. (3) The variation range of the measured variable is wide. For example, the measured temperature can be a high temperature above 1000 ℃, or it can be. The low temperature below ℃ is even ultra-low temperature. (4) There are various detection methods. There are both intermittent measurement and continuous measurement; there is both single-parameter inspection and simultaneous multi-parameter inspection; there are also patrol inspections of different parameters at regular intervals, and so on. (5) The detection environment is relatively harsh. In the industrial process, there are many influencing factors that are not conducive to detection, such as power supply voltage fluctuations, a degree, pressure changes, and the existence of water vapor, smoke, dust, radiation, vibration, etc. at the work site. Therefore, the instrument is required to have strong anti-interference ability and corresponding protective measures. In order to adapt to the above-mentioned characteristics of industrial process detection, the detection instruments are required not only to have good static and dynamic characteristics, but also to adopt different measurement principles and measurement methods for different measured objects and side sites. In addition, in order to meet the new requirements for detection technology in industrial processes, there will be a variety of new automated instruments emerging. 2. Classification and composition of side-detecting instruments The gun-detecting instrument is the smallest instrument that can determine the maximum measured change. It can be a sensor, a transmitter, and an instrument that has both detection components and display devices. The sensor is an instrument that can receive the information from the side and convert it into output variables of the same or other nature according to certain rules. A sensor whose output is a standard signal is called a transmitter. The so-called standard signal refers to the signal whose upper and lower limits of the variation range have been standardized (such as 4-2OmADC, etc.). The detection instruments can be classified according to the following methods: (1) According to the measurement. It can be divided into temperature detection instruments, pressure detection instruments, flow basin detection instruments, level detection instruments, mechanical quantity detection instruments and process analysis instruments. (2) Classification by measurement principle. It can be divided into capacitive type, electromagnetic type, piezoelectric type, photoelectric type, ultrasonic type, nuclear radiation type side detection instrument, etc. (3) Classification by output signal. It can be divided into analog meters that output analog signals, digital meters that output digital signals, and side-detection switches (such as vibration level switches) that output switch signals. (4) Classification by structural and functional characteristics. According to whether the measurement result is displayed locally, it can be divided into an integrated instrument that integrates the display function and a unit combination instrument that converts the measurement result into a standard output signal and transmits it to the control room for centralized display. Or according to whether the instrument is It contains a microprocessor. It is divided into a conventional instrument without a microprocessor and a microcomputerized instrument with a microprocessor as the core. The latter has higher and higher integration and stronger functions, and some already have certain artificial intelligence, which are often called intelligent instruments. At present, some instrument supply has launched“virtual instrument”the concept of.

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