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Body temperature detection method and high-precision dynamic calibration electronic thermometer device

A detection method and high-precision technology, applied in diagnostic recording/measurement, medical science, sensors, etc., to achieve the effect of improving accuracy and performance

Inactive Publication Date: 2015-10-14
深圳掌康科技有限公司
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The specific calibration idea is to compensate a resistor outside the circuit to correct the resistance error of the NTC and obtain the calibrated temperature value. This method is a one-time calibration before leaving the factory, and errors will occur due to factors such as temperature, humidity, and component aging.

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  • Body temperature detection method and high-precision dynamic calibration electronic thermometer device
  • Body temperature detection method and high-precision dynamic calibration electronic thermometer device
  • Body temperature detection method and high-precision dynamic calibration electronic thermometer device

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Embodiment Construction

[0020] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0021] Such as Figure 1-Figure 3 As shown, the present invention provides a kind of body temperature detection method, and it comprises the following steps,

[0022] Step 1: According to the AD value corresponding to the two resistances read by the high-precision reference resistance, calculate the parameter value of the calibration fitting function in real time according to the preset parameters, and obtain the AD value corresponding to the setting of the two resistances;

[0023] The second step: measure the measured value AD of the resistance, and obtain the calibrated AD value according to the calibration fitting function;

[0024] The third step is to obtain the calibrated measured resistance value according to the calibrated AD value;

[0025] In the fourth step, a calibrated measured temperature value is obt...

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Abstract

A body temperature detection method is characterized by comprising the steps of firstly, calculating and calibrating the parameter values of a fitting function in real time according to preset parameters and the AD values, read by high-precision reference resistors, of two resistors, and obtaining the AD values of the two resistors; secondly, measuring the AD value of a resistor, and obtaining a calibrated AD value through fitting function calibration; thirdly, obtaining a calibrated measured resistance value according to the calibrated AD value; fourthly, obtaining a calibrated measured temperature value according to the resistance value. According to the method, the two high-precision resistors serve as the reference resistors, the fitting function is designed according to the characteristics of an AD sampling device, the parameter values of the fitting function are calibrated dynamically in real time, and the parameter values are calculated dynamically each time measurement is conducted, so that the calibrated temperature value is obtained and the precision and performance of the electronic thermometer device are improved.

Description

technical field [0001] The invention relates to a body temperature detection method and an electronic thermometer device. Background technique [0002] Electronic thermometers have the characteristics of clear readings and fast temperature measurement, gradually replacing mercury thermometers. Electronic thermometers currently generally use AD to read the voltage to calculate the resistance of the NTC to obtain the temperature value. Due to the error of the AD device itself, as well as temperature drift and environmental influences, there will be deviations in reading the voltage of the AD, so that the thermometer will produce errors. The current solution to this error on the market is to add a compensation resistor to the circuit, and calibrate it once before leaving the factory to compensate for this error. [0003] Due to factors such as environmental temperature, humidity, and aging of components, the electronic thermometer will cause a decrease in accuracy performance...

Claims

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Application Information

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IPC IPC(8): A61B5/01
CPCA61B5/01A61B5/7225
Inventor 唐丹田应忠方达远
Owner 深圳掌康科技有限公司
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