NTC thermistor temperature and resistance detection method and temperature sensor detection method
A technology of temperature sensor and thermistor, which is used in thermometers, thermometers, and instruments that use electrical/magnetic components that are directly sensitive to heat. It can solve the problem of inaccurate data acquisition, large control system resource consumption, and poor temperature results To solve the problem, to achieve the effect of simple and convenient calculation, improved temperature resolution and numerical accuracy, and avoid tedious table lookup
Inactive Publication Date: 2020-09-04
GUANGDONG NEW ENERGY TECH DEV
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[0002] The traditional NTC temperature sensor uses the method of looking up the resistance value corresponding to the temperature table. This method has problems such as poor accuracy of the temperature result and low efficiency of the table lookup, resulting in inaccurate data acquisition and high resource consumption of the control system.
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[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0027] The NTC sensor is a thermistor, and the principle of detecting temperature is that the resistance drops rapidly as the temperature rises.
[0028] Referring to Table 1 below, it is the temperature resistance characteristic table of NTC thermistor:
[0029]
[0030]
[0031] Refer to Table 1 to obtain the resistance-temperature curve, refer to figure 1 , The temperature acquisition method in the NTC thermistor temperature and resistance detection method is based on da...
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The invention discloses an NTC thermistor temperature and resistance detection method and a temperature sensor detection method. Based on data analysis and curve fitting, the whole temperature and resistance range of the resistance-thermometer is determined according to curve characteristics of different sections; an appropriate and efficient curve fitting operation are selected to obtain a characteristic curve function in an interval, a resistance value is the substituted into the function to obtain a corresponding temperature value, the characteristic curve functions of different sections being as follows: in a low-resistance interval section, func1 (R) = p1 * R ^ 3 + p2 * R ^ 2 + p3 * R + p4; in the medium-resistance interval section, func2 (R) = p1 * R ^ 5 + p2 * R ^ 4 + p3 * R ^ 3 + p4 * R ^ 2 + p5 * R + p6; in the high-resistance interval section, func3 (R) = p1 * R ^ 4 + p2 * R ^ 3 + p3 * R ^ 2 + p4 * R + p5; wherein p1, p2, p3, p4, p5 and p6 are constants. According to the temperature detection method, on the basis of data analysis and curve fitting, the characteristic curve in each characteristic interval is fitted in a segmented mode, so that the method is simple and convenient, and the temperature value corresponding to any resistance value in the interval can be efficiently calculated; compared with a table look-up method, tedious table look-up and value estimationprocesses are omitted.
Description
technical field [0001] The invention relates to the technical field of heat pumps, in particular to an NTC thermistor temperature and resistance detection method and a temperature sensor detection method. Background technique [0002] The traditional NTC temperature sensor adopts the method of looking up the resistance value corresponding to the temperature table. This method has problems such as poor accuracy of the temperature result and low efficiency of the table lookup, resulting in inaccurate data acquisition and high resource consumption of the control system. [0003] In order to solve this problem, the present invention is hereby proposed. Contents of the invention [0004] The object of the present invention is to provide an NTC thermistor temperature and resistance detection method, and obtain the temperature value through the resistance. [0005] The purpose of the present invention can be achieved through the following technical solutions: [0006] The NTC t...
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IPC IPC(8): G01K7/22
CPCG01K7/22
Inventor 赵密升林坚俊肖威
Owner GUANGDONG NEW ENERGY TECH DEV