General method of analog quantity acquisition

With the improvement of the industrial level of cyanide in my country, the measurement and control of the industrial site are becoming more and more important, and the measurement accuracy, data stability and other indicators have been greatly improved. A good data acquisition card can bring a lot of convenience for data acquisition in complex environments. The general method of
analog quantity acquisition
During the production process, the measured parameters, such as temperature, flow, JI force, liquid level, speed, etc., are all continuously changing quantities, which are called analog quantities. The data processed by the single-chip microcomputer can only be digital, so before entering the single-chip microcomputer, the analog value must be converted into a digital value (that is, A/D conversion). The main components that need to be used are: multiplexers, sample-and-holds, A/D converters, etc., among which the A/D converter is the core component.
There are many types of A/D converters, and they are divided into 8 bits, 10 bits, 12 bits, etc. The higher the number, the higher the resolution, but the more expensive it is. In terms of structure, there are A/D converters (such as ADC0801. AD673, etc.), and A/D converters with multiple switches (such as ADC0809. ADC0816 are equipped with multiple switches). With the development of large-scale integrated circuits, a multi-functional A/D conversion chip has been produced. AD363 is a typical chip of it. It has 16-way multiplexers, data amplifiers, sample-and-hold devices and 12-bit A/D converters inside, and its wooden body constitutes a complete data acquisition system. In recent years, with the extensive use of microcomputers, many inexpensive A/D converters have appeared.