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A Fitting Method of Resistance Wire Resistance
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A resistance wire and resistance value technology, which is applied in electrical digital data processing, instruments, design optimization/simulation, etc., can solve problems such as inability to accurately reflect the real-time resistance value of resistance wire, and inability to control temperature accurately, achieving small error and high accuracy High, data continuous effect
Active Publication Date: 2019-04-05
SHENZHEN SMISS TECH CO LTD
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Problems solved by technology
[0005] The invention provides a resistance value fitting method of resistance wire, which aims to solve the problem that the existing resistance value fitting method of resistance wire cannot accurately reflect the real-time resistance value of resistance wire, which leads to the inability to accurately control the temperature when controlling the temperature of resistance wire The problem
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Embodiment 1
[0021] In this example one, Ni200 heating wire resistance is used for fitting, the nickel content is 99.85%, the test resistance range is 0.08-0.3Ω, every 0.01Ω is a resistance value file, and the temperature range is from 148-371°C, one for every 25°C Temperature range, respectively measure the resistance value of a certain resistance heating wire in different temperature ranges, record the data, measure three groups in parallel, and take the average value;
[0022] Table 1 Resistance value of Ni200 0.08Ω300-700°F
[0023]
[0024]
[0025] Table 2 Resistance value of Ni200 0.09Ω300-700°F
[0026]
[0027] Table 3 Resistance value of Ni200 0.1Ω300-700°F
[0028]
[0029] According to the above method, and so on, 0.3Ω is measured, and the average TCR value is shown in Table 4;
[0030] ② Formula fitting, R 2 =R 1 +TCR AVG · R 1 ·(T 2 -T 1 ), R 2 --Target temperature resistance; R 1 --Initial temperature resistance; T 2 --Target temperature; T 1 --Initia...
Embodiment 2
[0047] In Example 2, a 316L heating wire is used for resistance fitting, the test resistance range is 0.5-1.0Ω, each 0.1Ω is a resistance value range, the temperature range is from 148-371°C, and each 25°C is a temperature range, respectively measured Find the resistance value of a certain resistance heating wire in different temperature ranges, record the data, measure three groups in parallel, and take the average value;
[0048] Table 9 Resistance value of 316L 0.5Ω300-700°F
[0049]
[0050]
[0051] According to the above method, and so on, 1.0Ω is measured, and the average TCR value is shown in Table 10;
[0052] ② Formula fitting, R 2 =R 1 +TCR AVG · R 1 ·(T 2 -T 1 ), R 2 --Target temperature resistance; R 1 --Initial temperature resistance; T 2 --Target temperature; T 1 --Initial temperature; TCR AVG--The average TCR value at the target temperature; use this formula to calculate the fitted value and calculate the error;
[0053] Table 11 Deviation bet...
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Abstract
The invention discloses a resistance wire resistance value fitting method. The method comprises the following steps: basic data test, TCR calculation, average TCR value calculation, formula fitting and formula correction, wherein the error of 96% of data of the resistance wire resistance value can be controlled within 5%. The method is scientific, effective, good in repeated emergence and high in accuracy. According to the method, the traditional table data is replaced by a formula, so that much storage memory is saved; the data is continuous and is more close to or identical with the actual working condition, so that accurate temperature control can be realized; the method is wide in adaptation and suitable for single pure metals or alloys.
Description
technical field [0001] The invention relates to a method for fitting the resistance value of a resistance wire. Background technique [0002] The basic principle of the temperature control concept is that the resistance value of a certain metal heating wire will change proportionally with the change of working temperature, that is, there is a certain linear fitting relationship between the metal resistance value and its temperature. The chip achieves (dynamic real-time resistance value) ≈ (target temperature resistance value) by measuring the resistance several times per second and cooperating with the database data stored in the chip in real time, so as to realize the protection of temperature. Realizing temperature control by changing the resistance value is now mainly used in instant and fast heating electric heaters, including electrical equipment such as electronic cigarettes, water dispensers, coffee machines, and electric hot water beds. [0003] The relatively preci...
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