CN104970776B - A kind of body temperature detection method and a kind of Dynamic High-accuracy calibration electric body-temperature counter device - Google Patents
A kind of body temperature detection method and a kind of Dynamic High-accuracy calibration electric body-temperature counter device Download PDFInfo
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- CN104970776B CN104970776B CN201510381845.4A CN201510381845A CN104970776B CN 104970776 B CN104970776 B CN 104970776B CN 201510381845 A CN201510381845 A CN 201510381845A CN 104970776 B CN104970776 B CN 104970776B
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- 230000036760 body temperature Effects 0.000 title claims abstract description 17
- 238000001514 detection method Methods 0.000 title claims abstract description 9
- 238000005259 measurement Methods 0.000 claims abstract description 17
- 238000004364 calculation method Methods 0.000 claims description 2
- 241000208340 Araliaceae Species 0.000 claims 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 claims 1
- 235000003140 Panax quinquefolius Nutrition 0.000 claims 1
- 235000008434 ginseng Nutrition 0.000 claims 1
- 238000005070 sampling Methods 0.000 abstract description 2
- 238000009529 body temperature measurement Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 238000003483 aging Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008542 thermal sensitivity Effects 0.000 description 2
- 230000036757 core body temperature Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/01—Measuring temperature of body parts ; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7225—Details of analog processing, e.g. isolation amplifier, gain or sensitivity adjustment, filtering, baseline or drift compensation
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- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
A kind of body temperature detection method, it is characterised in that：It includes the following steps, the first step：According to the corresponding AD values of two resistance that high-precision reference resistance is read, the parameter value of calibration fitting function is calculated in real time according to parameter preset, obtain the corresponding AD values of two resistance of setting；Second step：The measured value AD of resistance is measured, the AD values after being calibrated according to calibration fitting function；Third walks, and the measurement resistance value after calibration is worth to according to the AD after calibration；4th step is worth to the measurement temperature value of calibration according to resistance.Apparatus of the present invention are used as by two precision resisters with reference to resistance, fitting function is designed according to the characteristic of AD Sampling devices, dynamic realtime calibrates the parameter value of fitting function, measures dynamic calculating parameter value every time, temperature value after being calibrated improves the precision and performance of electronic thermometer.
Description
Technical field
The present invention relates to a kind of body temperature detection methods and a kind of electric body-temperature counter device.
Background technology
The features such as electronic thermometer has clear reading, and thermometric speed is fast gradually substitutes mercury clinical thermometer.Electronic thermometer
The resistance using by AD reading voltage calculating NTC general at present obtains temperature value.Due to AD devices error in itself and
Temperature drift and environment influence, and deviation can be generated by reading the voltage of AD, so that thermometer can generate error.Solution on the market now
The scheme of this error is to add a compensation resistance in circuit, is disposably calibrated before manufacture, compensates this error.
Electronic thermometer with reasons such as environment temperature, humidity and component agings, can cause precision property decline and
Electronic thermometer component inherent accuracy problem, for these problems, the present invention proposes a kind of dynamic calibration electronic thermometer
Device.These are solved the problems, such as well, make electronic thermometer that there is degree of precision and performance.
Current collimation technique is the error according to measurement, is disposably calibrated before manufacture.Specific calibration thinking is outside circuit
A resistance is compensated, to correct the resistance error of NTC, the temperature value after being calibrated, this method is disposable school before manufacture
Standard can generate error with reasons such as temperature, humidity and component agings.
Invention content
To solve the above problems, the present invention provides a kind of body temperature detection method and a kind of Dynamic High-accuracy calibration electric body-temperature
Counter device, apparatus of the present invention are used as with reference to resistance by two precision resisters, are designed and be fitted according to the characteristic of AD Sampling devices
Function, dynamic realtime calibrate the parameter value of fitting function, every time measurement dynamic calculating parameter value, the temperature value after being calibrated,
Improve the precision and performance of electronic thermometer.
To achieve the above object, the present invention provides a kind of body temperature detection method, it is characterised in that：It includes the following steps,
The first step：According to the corresponding AD values of two resistance that high-precision reference resistance is read, counted in real time according to parameter preset
The parameter value of calibration fitting function is calculated, obtains the corresponding AD values of two resistance of setting；
Second step：The measured value AD of resistance is measured, the AD values after being calibrated according to calibration fitting function；
Third walks, and the measurement resistance value after calibration is worth to according to the AD after calibration；
4th step is worth to the measurement temperature value of calibration according to resistance.
A kind of Dynamic High-accuracy calibrates electric body-temperature counter device, including thermistor, at least two reference resistances, micro-control
Unit and display end processed,
The thermistor is connect with the micro-control unit signal, and thermistor is used to detect current thermal sensitivity and provide
Temperature-sensitive signal；
The reference resistance, remaining described micro-control unit signal connection, the reference resistance are used to provide reference resistance
Value；
The micro-control unit after receiving the signal that thermistor and reference resistance provide, is processed into temperature signal, and pass
Pass display end.
Further, the display end is LCD or LED display.
Advantageous effect of the present invention：Apparatus of the present invention are used as by two precision resisters with reference to resistance, according to AD samplers
The characteristic design fitting function of part, dynamic realtime calibrate the parameter value of fitting function, measure dynamic calculating parameter value every time, obtain
Temperature value after calibration improves the precision and performance of electronic thermometer.
Description of the drawings
Fig. 1 is a kind of flow chart of body temperature detection method of the present invention.
Fig. 2 calibrates electronic thermometer device circuit figure for a kind of Dynamic High-accuracy of the present invention.
Fig. 3 calibrates electric body-temperature counter device example circuit diagram for a kind of Dynamic High-accuracy of the present invention.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
As shown in Figure 1-Figure 3, the present invention provides a kind of body temperature detection method, includes the following steps,
The first step：According to the corresponding AD values of two resistance that high-precision reference resistance is read, counted in real time according to parameter preset
The parameter value of calibration fitting function is calculated, obtains the corresponding AD values of two resistance of setting；
Second step：The measured value AD of resistance is measured, the AD values after being calibrated according to calibration fitting function；
Third walks, and the measurement resistance value after calibration is worth to according to the AD after calibration；
4th step is worth to the measurement temperature value of calibration according to resistance.
A kind of Dynamic High-accuracy calibrates electric body-temperature counter device, including thermistor, at least two reference resistances, micro-control
Unit and display end processed,
The thermistor is connect with the micro-control unit signal, and thermistor is used to detect current thermal sensitivity and provide
Temperature-sensitive signal；
The reference resistance, remaining described micro-control unit signal connection, the reference resistance are used to provide reference resistance
Value；
The micro-control unit after receiving the signal that thermistor and reference resistance provide, is processed into temperature signal, and pass
Pass display end.The display end is LCD or LED display.
The technical program is described in detail by one (or several) concrete instance and can achieve the effect that.
In basal body temperature measurement, core body temperature measurements required precision is higher.Precision will especially between 35 DEG C and 38 DEG C
Ask comparison high.Therefore the technical program explains the present invention by taking the clinical thermometer that basal body temperature measures as an example.Example of the present invention is as schemed
3。
This example chooses 35 DEG C and 38 DEG C of two temperature values are as a reference point.
According to the NTC features of selection, the NTC resistance values that 35 DEG C of NTC resistance values are 32.590,38 DEG C are K0, high-precision
Reference resistance resistance value then selects K1 and K2. accuracy rating one thousandths.With reference to the accompanying drawings 3, in addition divider resistance resistance value is K3, power supply
Supply voltage is VCC, then theoretically the AD values with reference to 35 DEG C are K1/ (K1+K3), are K2/ (K2+ with reference to 38 DEG C of AD values
K3)。
For measuring each time, it is assumed that it is practical to measure 35 DEG C of corresponding AD values as X1, it is practical to measure 38 DEG C of corresponding AD values
For X2.
So for calibrating fitting function y=ax+b.Respectively the theoretical value of 35 DEG C and 38 DEG C two reference points and
Actual measured value（X1, K1/ (K1+K3)）,（X2, K2/ (K2+K3)）Calibration fitting function is substituted into, calibration fitting letter can be obtained
Several parameters a, b:
a = (K1/(K1+K3) - K2/(K2+K3))/(X1 – X2)
The AD values of NTC that b=(K1*X2/ (K1+K3)-K2*X1/ (K2+K3))/(X2-X1) is so actually measured are
X0, then the resistance value after calibration is：
((K1/(K1+K3) - K2/(K2+K3))/(X1 – X2))*X0 + (K1*X2/(K1+K3) - K2*X1/(K2
+K3))/(X2 – X1)。
Temperature value after being calibrated according to the formula of the temperature resistance value of NTC.
The value after each NTC actual alignment can be obtained in this way.
According to this scheme, basal body temperature measurement clinical thermometer, which is placed in high-accuracy and constant warm water tank, to be measured, practical to compare, 35
DEG C it can reach 0.02 DEG C to precision between 38 DEG C, precision can reach between 32 DEG C to 35 DEG C and between 38 DEG C to 42 DEG C
0.05℃.Ensure the high-precision of clinical thermometer.
Calibration fitting function is designed as：
y = ax + b.X is the AD values according to reference resistance theoretical calculation.Y is the practical measurement AD values of reference resistance.a,b
Parameter for fitting function.
Due to being dynamic realtime calibration, measure all can generate fitting function each time according to automatic calculate of reference measure
A, b parameter values.
Using the clinical thermometer of the present apparatus, temperature drift and environment are influenced, can be calibrated with dynamic realtime, measuring can move every time
The reference value of state digital simulation function, real time calibration obtain the temperature value after calibration.The advantages of apparatus of the present invention is：
1), apparatus of the present invention can be compensated due to error caused by AD devices error in itself and temperature drift and environment.
Ensure measurement result precision height.
2) application environment and service life of clinical thermometer, are increased.
Claims (1)
1. a kind of body temperature detection method, it is characterised in that：It includes the following steps,
The first step：The corresponding AD values of resistance and two ginsengs are measured at two reference points read according to high-precision reference resistance
The corresponding theory AD values of resistance are measured at examination point, calculate the parameter value of calibration fitting function in real time according to parameter preset；
Second step：The measured value AD for measuring resistance is read, the measurement resistance AD values after being calibrated according to calibration fitting function；
Third walks, and the measurement resistance value after calibration is worth to according to the measurement resistance AD after calibration；
4th step is worth to the measurement temperature value of calibration according to the measurement resistance after calibration；
It chooses 35 DEG C and 38 DEG C of two temperature values is as a reference point；
It is NTC resistance that note, which measures resistance, and according to the NTC features of selection, 35 DEG C of NTC resistance values are electric for 32.590,38 DEG C of NTC
Resistance value is K0, and high-precision reference resistance then selects K1 and K2, and in addition divider resistance resistance value is K3, and power source supplying voltage is
VCC, then theoretically the AD values of the NTC resistance of 35 DEG C of reference point be K1/ (K1+K3), the AD values of the NTC resistance of 38 DEG C of reference point
For K2/ (K2+K3)；
For measuring each time, the AD values that document border measures 35 DEG C of corresponding NTC resistance are X1, and practical 38 DEG C of measurement is corresponding
The AD values of NTC resistance are X2；
So for calibrating fitting function y=ax+b；Respectively the reality of the AD values of the NTC resistance of 35 DEG C and 38 DEG C two reference points
Border measured value and theoretical value (X1, K1/ (K1+K3)), (X2, K2/ (K2+K3)) substitute into calibration fitting function, obtain calibration fitting
Parameter a, b of function:
A=(K1/ (K1+K3)-K2/ (K2+K3))/(X1-X2)；
The AD values of NTC that b=(K1*X2/ (K1+K3)-K2*X1/ (K2+K3))/(X2-X1) is so actually measured are X0, then
The resistance value of NTC resistance after calibration is：
((K1/(K1+K3)-K2/(K2+K3))/(X1–X2))*X0+(K1*X2/(K1+K3)-K2*X1/(K2+K3))/(X2–
X1)；
Temperature value after being calibrated according to the formula of the temperature resistance value of NTC；
The temperature value after each NTC actual alignment is obtained in this way；
Calibration fitting function is designed as：
Y=ax+b, x are the practical measurement AD values of NTC resistance, and y is according to the AD values of the NTC resistance of reference resistance theoretical calculation, a, b
Parameter for fitting function；Due to being dynamic realtime calibration, measure all can calculate generation each time according to the automatic of reference measure
A, b parameter value of fitting function.
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| CN201510381845.4A CN104970776B (en) | 2015-07-03 | 2015-07-03 | A kind of body temperature detection method and a kind of Dynamic High-accuracy calibration electric body-temperature counter device |
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| WO2017102521A1 (en) * | 2015-12-15 | 2017-06-22 | Koninklijke Philips N.V. | Methods and apparatus for calibrating a medical monitoring device |
| CN105852821A (en) * | 2016-03-23 | 2016-08-17 | 苏州贝莱弗医疗科技有限公司 | Body temperature measurement device and measurement method thereof |
| WO2020154953A1 (en) * | 2019-01-30 | 2020-08-06 | 深圳市科曼医疗设备有限公司 | Apparatus and method for detecting and calibrating intracranial pressure and intracranial temperature |
| CN110095155B (en) * | 2019-05-21 | 2021-08-10 | 深圳洲斯移动物联网技术有限公司 | Control method, temperature and humidity detection device and temperature and humidity detection system |
| CN113514699A (en) * | 2020-04-09 | 2021-10-19 | 台达电子工业股份有限公司 | Thermal control system, thermal control method and temperature correction device |
| CN112182493B (en) * | 2020-09-17 | 2024-01-09 | 深圳市显控科技股份有限公司 | Analog quantity calibration method, analog quantity calibration device, electronic equipment and storage medium |
| CN112649105A (en) * | 2020-12-26 | 2021-04-13 | 青岛鼎信通讯股份有限公司 | PT100 temperature calibration and measurement method |
| CN114878026B (en) * | 2022-04-17 | 2024-10-29 | 深圳刷新生物传感科技有限公司 | High-precision electronic thermometer capable of realizing rapid temperature measurement |
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| EP1643228B1 (en) * | 2003-12-14 | 2012-05-23 | Actherm Inc. | Electronic clinical thermometer with a detachable probe |
| CN100396232C (en) * | 2005-04-06 | 2008-06-25 | 红电医学科技股份有限公司 | Pacifier Thermometer |
| US8974115B2 (en) * | 2012-04-27 | 2015-03-10 | Kinsa, Inc. | Temperature measurement system and method |
| CN203138459U (en) * | 2013-01-24 | 2013-08-21 | 重庆融海超声医学工程研究中心有限公司 | Temperature measuring device |
| CN103385700A (en) * | 2013-08-02 | 2013-11-13 | 王卫东 | High-precision rapid self-calibration wireless electronic thermometer |
| CN104107032B (en) * | 2014-06-24 | 2016-05-18 | 深圳市迈泰生物医疗有限公司 | Electric body-temperature is taken into account the school temperature method of this electronic thermometer |
| CN204072062U (en) * | 2014-08-11 | 2015-01-07 | 深圳市理邦精密仪器股份有限公司 | A kind of temperature sensing device and armarium |
| CN204274423U (en) * | 2014-12-10 | 2015-04-22 | 成都泰盟软件有限公司 | Clinical thermometer auto-calibration circuits |
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