Intelligent digital displaying meter

Abstract

The invention provides an intelligent digital display instrument controlled by a single-chip micro-controller, which is characterized in that a digital display signal obtained through a CAN communication interface or an analog input channel is subjected to online calibration, compensation and calibration, and nonlinear correction. , split-range display and other digital signal processing, using scanning matrix control, to achieve up to 240 high-precision LED ring light strip and 3-digit two-color seven-segment digital tube display. The instrument has the advantages of high precision, good stability and full digitalization. At the same time, the fixed module structure adopted by the instrument and the control method of the instrument characteristic value database improve the flexibility of the instrument, simplify the production process, and are beneficial to many varieties. The mass production of the instrument greatly saves the operating cost of the communication between the instrument and the system, expands the application of the display instrument in the digital field, and is a major technological progress of the display instrument.

Description

technical field [0001] The invention relates to a display instrument, in particular to an intelligent display instrument which combines a high-density LED circular light belt with a digital display, and can directly communicate digitally and input 4-20mA standard current. Background technique [0002] The display instrument is used to indicate the relevant parameter values ​​in the monitoring system, which is convenient for the operator to observe. Most of the traditional display instruments use a single pointer, digital tube or linear light strip display. The pointer instrument is intuitive, but the accuracy and resolution are low, it is difficult to realize multi-range display, and the anti-vibration ability is poor; the digital tube display instrument has high resolution, but it is not conducive to long-distance observation, especially if multiple The effect of digital display instrument is even worse; the linear light band is limited by the size of the instrument, and t...

AI Technical Summary

Problems solved by technology

Pointer instruments are intuitive, but with low accuracy and resolution, it is difficult to realize multi-range display, and the anti-vibration ability is poor; The effect of the digital display instrument is even worse; the linear light band is limited by the size of the instrument, and the number of display segments is generally below 100, so the accuracy and resolution are not high

In addition, traditional display instruments use analog signals as transmission signals, which have low precision and are easily affected by electromagnetic interference

Traditional display instruments generally do not have digital signal processing capabilities, so they can only passively and simply indicate the input signal value, without functions such as calibration, split-range display, and nonlinear processing, let alone digital communication capabilities

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