Method for quickly and accurately converting temperature on basis of quick table lookup and Newton iteration

Abstract

The invention provides a method for quickly and accurately converting the temperature on the basis of quick table lookup and Newton iteration. The method includes comparing a resistance value of a temperature sensor to a standard indexing table of sensor materials to quickly find a temperature range corresponding to the resistance value in the indexing table; converting standard 'resistance-temperature' physical formulas corresponding to the sensor materials into a corresponding iterative formula by a quick Newton iterative algorithm; using one of values in the temperature range found in the first step as an initial value of the iterative formula and defining a final temperature value precision range; computing by the aid of the quick iterative algorithm to obtain a temperature value with the required precision. The method has the advantage that the temperature detected by the temperature sensor at a monitoring point can be quickly, accurately and reliably acquired.

Description

technical field [0001] The invention relates to the field of temperature inspection devices for hydropower systems, in particular to a method for accurately converting sensor resistance into detection point temperature based on fast table lookup and Newton iterative algorithm. Background technique [0002] Temperature parameter is one of the production process parameters commonly used in industrial production at present, especially in power plants, some temperature parameters participate in alarm and shutdown protection. At present, in the temperature inspection device of the power system, there are many detection points of the system temperature (such as 72, 96 points), and the monitoring targets are relatively scattered; therefore, the temperature detected by the temperature sensor at the monitoring point can be quickly, accurately and reliably obtained to ensure power supply Early warning of accidents and normal operation monitoring of system devices are of great signific...

AI Technical Summary

Problems solved by technology

However, these two methods have obvious shortcomings. Although the table lookup is fast, the temperature values ​​obtained are not accurate; and the empirical formula calculation requires a large amount of root calculation in the actual temperature measurement chip, which leads to the speed of uploading the temperature value to the master station. slow

[0003] At present, the commonly used temperature inspection device is mostly only an approximate detection method for temperature detection, and the calculation is complicated.

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