CN105342579A - Body temperature measuring method and device - Google Patents

Abstract

The invention discloses a body temperature measuring method and device. According to the method, an actual temperature rise curve detected by a temperature probe is regarded as a result of fitting a first ideal temperature rise curve and a second ideal temperature rise curve. By means of the four equitime interval points on the actual temperature rise curve and actual temperature corresponding to each equitime interval point, first ideal temperature, corresponding to each equitime interval point, on the first ideal temperature rise curve and second ideal temperature, corresponding to each equitime interval point, on the second ideal temperature rise curve are calculated; then, the body temperature is predicted on the basis of the first ideal temperature rise curve or the second ideal temperature rise curve to obtain the body temperature. Compared with the prior art, the method adopts the ideal temperature rise curves for predicting the human body temperature, meets the requirement of a Newton heat conduction formula, and improves the prediction accuracy.

Description

A kind of body temperature measurement method and device

Technical field

The application relates to measurement of bldy temperature field, more particularly, relates to a kind of body temperature measurement method and device.

Background technology

Electronic clinical thermometer is divided into continous way and prediction type two kinds: continous way electronic clinical thermometer can in real time, continuous print shows the temperature at tested position.Prediction type electronic clinical thermometer can than faster, the temperature at the tested position of discrete display, its measuring principle is: after temperature probe and human contact, the Variation Features of heating curve in a period of time, dopes equilibrium temperature when temperature probe and the tested position of human body reach thermal balance.Because it need not wait until that temperature probe and human body reach thermal balance and can obtain human body temperature, because this reducing the time of measuring and needing.

Existing prediction type electronic clinical thermometer is when predicting human body temperature, and its Main Basis is newton's thermal transport formula.Newton's thermal transport formula is set up under having endless, well-beaten thermal source for the ideal conditions of heating sensor, but heating curve obtained in actual applications is not the ideal rising temperature curve that newton's conduction of heat formula requires, thus the prediction accuracy of existing prediction type electronic clinical thermometer is low.

Summary of the invention

In view of this, the application provides a kind of body temperature measurement method and device, the prediction accuracy of electronic clinical thermometer during to improve prediction.

To achieve these goals, the existing scheme proposed is as follows:

A kind of body temperature measurement method, comprising:

Obtain the temperature data that temperature probe detects, build actual heating curve, wherein said actual heating curve can regard as the first ideal rising temperature curve and the matching of secondary ideal heating curve forms;

Determine four constant duration points in described actual heating curve, and the actual temperature that each constant duration point is corresponding;

Each constant duration o'clock the first ideal temperature corresponding on the first ideal rising temperature curve and secondary ideal temperature corresponding on secondary ideal heating curve is calculated according to default equation group;

Based on newton's conduction of heat formula, described first ideal temperature corresponding according to each constant duration point or described secondary ideal temperature, prediction human body temperature.

Preferably, also comprise before the actual heating curve of described structure:

Filtering Processing is carried out to the temperature data that temperature probe detects, deletes irrational temperature data.

Preferably, described default equation group is:

$\left\{\begin{array}{c}{T}_0=(1-coef)*T_{d0}+coef*T_{k0}\\ T_1=(1-coef)*T_{d1}+coef*T_{k1}\\ T_2=(1-coef)*T_{d2}+coef*T_{k2}\\ T_3=(1-coef)*T_{d3}+coef*T_{k3}\\ T_{k0}=T_0\\ (T_{k1}^2-T_{k0}{T}_{k2})/(2T_{k1}-T_{k0}-T_{k2})=(T_{d1}^2-T_{d0}{T}_{d2})/(2T_{d1}-T_{d0}-T_{d2})\\ (T_{k2}-T_{k1})/(T_{k1}-T_{k0})=(T_{k3}-T_{k2})/(T_{k2}-T_{k1})\\ (T_{d2}-T_{d1})/(T_{d1}-T_{d0})=(T_{d3}-T_{d2})/(T_{d2}-T_{d1})\end{array}\right.$

Wherein, T ₀, T ₁, T ₂, T ₃for constant duration point t ₀, t ₁, t ₂, t ₃corresponding actual temperature, T _d0, T _d1, T _d2, T _d3for constant duration point t ₀, t ₁, t ₂, t ₃the first corresponding ideal temperature, T _k0, T _k1, T _k2, T _k3for constant duration point t ₀, t ₁, t ₂, t ₃corresponding secondary ideal temperature, coef is preset relation proportionality coefficient.

Preferably, described based on newton's conduction of heat formula, described first ideal temperature corresponding according to each constant duration point or described secondary ideal temperature, prediction human body temperature, comprising:

Based on preset formula $T_F=(T_{d1}^2-T_{d0}{T}_{d2})/(2T_{d1}-T_{d0}-T_{d2})$ Or preset body temperature, wherein, T _ffor final equilibrium temperature.

Preferably, described based on newton's conduction of heat formula, described first ideal temperature corresponding according to each constant duration point or described secondary ideal temperature, prediction human body temperature, also comprises afterwards:

Whether checking predicts the outcome reasonable, then shows the temperature data of popping one's head in and detecting if not in real time;

Wherein, when the time constant D τ that the first ideal rising temperature curve is corresponding is less than time constant B τ corresponding to secondary ideal heating curve, determine to predict the outcome rationally;

D τ=-Δ t/ln ((T _d2-T _d1)/(T _d1-T _d0)), B τ=-Δ t/ln ((T _k2-T _k1)/(T _k1-T _k0)), the time interval value of described Δ t constant duration point.

Preferably, described four the constant duration points determined in described actual heating curve, comprising:

With the maximum point of described warming temperature slope for initial point, based on described initial point, determine four constant duration points.

Preferably, the span of described coef is 0.2 ~ 0.4.

A kind of body temperature measuring device, comprising:

Actual heating curve construction unit, for obtaining the temperature data that temperature probe detects, builds actual heating curve, and wherein said actual heating curve can regard as the first ideal rising temperature curve and the matching of secondary ideal heating curve forms;

Constant duration point determining unit, for determining four constant duration points in described actual heating curve, and the actual temperature that each constant duration point is corresponding;

First computing unit, for calculating each constant duration o'clock the first ideal temperature corresponding on the first ideal rising temperature curve and secondary ideal temperature corresponding on secondary ideal heating curve according to presetting equation group;

Second computing unit, for based on newton's conduction of heat formula, described first ideal temperature corresponding according to each constant duration point or described secondary ideal temperature, prediction human body temperature.

Preferably, described actual heating curve construction unit:

Data prediction subelement, carries out Filtering Processing for the temperature data detected temperature probe, deletes irrational temperature data;

Curve builds subelement, for building heating curve according to the temperature data after process.

Through as shown from the above technical solution, this application discloses a kind of body temperature measurement method and device.The actual heating curve that temperature probe detects by the method is considered as the result of the first ideal rising temperature curve and the matching of secondary ideal heating curve.By four constant duration points on actual heating curve and actual temperature corresponding to each constant duration point, calculate the first ideal temperature that each constant duration is corresponding o'clock on the first ideal rising temperature curve, and secondary ideal temperature corresponding on secondary ideal heating curve.Because the first ideal rising temperature curve and secondary ideal heating curve meet the requirement of newton's conduction of heat formula, thus the present invention and then predict human body temperature based on the first ideal rising temperature curve or secondary ideal heating curve, obtains human body temperature.Compared with prior art, the present invention adopts ideal rising temperature curve to predict human body temperature, meets the requirement of newton's conduction of heat formula, improves prediction accuracy.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.

Fig. 1 shows the schematic flow sheet of a kind of body temperature measuring method disclosed in one embodiment of the invention;

Fig. 2 shows the structural representation of a kind of body temperature measuring device disclosed in another embodiment of the present invention.

Detailed description of the invention

Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.

The schematic flow sheet of a kind of thermometry disclosed in one embodiment of the invention is shown see Fig. 1.

In the present embodiment, the method comprises:

S101: obtain the temperature data that temperature probe detects, build actual heating curve.

After probe and human contact to be measured, actual heating curve is determined by the thermodynamic interaction of the tissue of human body and vascular system and health probe cover, complexity between sensor and probe rod.This actual heating curve can be considered that two desirable intensification matchings form.We establish the curve of main conduction path to be expressed as T _d, time constant is D τ, but in addition, also there is the conducting path that another is important, and its curve is designated as T _k, time constant is designated as B τ.T _kwith T _dbetween proportionate relationship be coefficient coef.In heat transfer process, when pop one's head in human contact to be measured time, prevailing should be probe and human body between conduction of heat, i.e. main conduction path recited above, its time constant D τ-value is less than B τ.

Optionally, before the actual heating curve of structure, need the temperature data to temperature probe detects to carry out Filtering Processing, delete irrational temperature data.

S102: determine four constant duration points in described actual heating curve, and the actual temperature that each constant duration point is corresponding.

Optional, with the maximum point of described warming temperature slope for initial point, based on described initial point, determine four constant duration points.

S103: calculate each constant duration o'clock the first ideal temperature corresponding on the first ideal rising temperature curve and secondary ideal temperature corresponding on secondary ideal heating curve according to default equation group.

Wherein, this predictive equation group is:

$\left\{\begin{array}{c}{T}_0=(1-coef)*T_{d0}+coef*T_{k0}\\ T_1=(1-coef)*T_{d1}+coef*T_{k1}\\ T_2=(1-coef)*T_{d2}+coef*T_{k2}\\ T_3=(1-coef)*T_{d3}+coef*T_{k3}\\ T_{k0}=T_0\\ (T_{k1}^2-T_{k0}{T}_{k2})/(2T_{k1}-T_{k0}-T_{k2})=(T_{d1}^2-T_{d0}{T}_{d2})/(2T_{d1}-T_{d0}-T_{d2})\\ (T_{k2}-T_{k1})/(T_{k1}-T_{k0})=(T_{k3}-T_{k2})/(T_{k2}-T_{k1})\\ (T_{d2}-T_{d1})/(T_{d1}-T_{d0})=(T_{d3}-T_{d2})/(T_{d2}-T_{d1})\end{array}\right.$

Wherein, T ₀, T ₁, T ₂, T ₃for constant duration point t ₀, t ₁, t ₂, t ₃corresponding actual temperature, T _d0, T _d1, T _d2, T _d3for constant duration point t ₀, t ₁, t ₂, t ₃the first corresponding ideal temperature, T _k0, T _k1, T _k2, T _k3for constant duration point t ₀, t ₁, t ₂, t ₃corresponding secondary ideal temperature, coef is preset relation proportionality coefficient.

It should be noted that, the derivation of this equation group is as follows:

The cryogenic object little when the large high temp objects of relative volume and relative volume contacts, and time of contact is designated as 0, and along with the growth of time, cryogenic object and high temp objects reach balance in a certain temperature, and the heating curve of little cryogenic object can be expressed as:

T(t)＝T ₀+(T _F-T ₀)(1-e ^-t/τ)(1)

Wherein: T (t) is the temperature compared with wisp, be the function of time

T ₀it is the initial temperature compared with wisp; T _fit is the equilibrium temperature of system;

T is the time, the variable of function; τ is the time constant of system

Moment t ₁during second, the temperature of sensing is T ₁, substitute into (1),

$e^{-t_1/\mathrm{\τ}}=1-\frac{T_1-T_0}{T_F-T_0}---\left(2\right)$

Moment t ₂during second, the temperature of sensing is T ₂, substitute into (1),

$e^{-t_2/\mathrm{\τ}}=1-\frac{T_2-T_0}{T_F-T_0}---\left(3\right)$

Work as t ₂, t ₁with initial time be at equal intervals time, t ₂=2t ₁, cancellation τ

The equilibrium temperature of system can be obtained

$T_F=\frac{{T_1}^2-T_0{T}_2}{2T_1-T_0-T_2}---\left(4\right)$

Obtained by (1) again

$T_F=\frac{T\left(t\right)-T_0}{1-e^{-t/\mathrm{\τ}}}+T_0---\left(5\right)$

By t ₁, t ₂the temperature in two moment is known

$T_F=T1+\frac{T_2-T_1}{1-e^{-(t_2-t_1)/\mathrm{\τ}}}=T_0+\frac{T_1-T_0}{1-e^{-t_1/\mathrm{\τ}}}---\left(6\right)$

Obtained by above formula, system time constant

$\mathrm{\τ}=-\frac{t}{\ln \frac{T_2-T_1}{T_1-T_0}}---\left(7\right)$

And then, above-mentioned equation group can be obtained according to formula (4) and formula (7), thus solve about T _d0, T _d1, T _d2, T _d3, T _k0, T _k1, T _k2, T _k3equation.

S104: based on newton's conduction of heat formula, described first ideal temperature corresponding according to each constant duration point or described secondary ideal temperature, prediction human body temperature.

Known by formula (4),

$T_F=(T_{d1}^2-T_{d0}{T}_{d2})/(2T_{d1}-T_{d0}-T_{d2})$ Or $T_F=(T_{k1}^2-T_{k0}{T}_{k2})/(2T_{k1}-T_{k0}-T_{k2}),$ Thus the prediction realized human body temperature.

As seen from the above embodiment, this application discloses a kind of body temperature measurement method.The actual heating curve that temperature probe detects by the method is considered as the result of the first ideal rising temperature curve and the matching of secondary ideal heating curve.By four constant duration points on actual heating curve and actual temperature corresponding to each constant duration point, calculate the first ideal temperature that each constant duration is corresponding o'clock on the first ideal rising temperature curve, and secondary ideal temperature corresponding on secondary ideal heating curve.And then, based on the first ideal rising temperature curve or secondary ideal heating curve, human body temperature is predicted, obtain human body temperature.Compared with prior art, the present invention adopts ideal rising temperature curve to predict human body temperature, meets the requirement of newton's conduction of heat formula, improves prediction accuracy.

It should be noted that, need to verify predicted result in other embodiment of the present invention.Concrete, due in heat transfer process, prevailing should be conduction of heat between probe and human body, and be thus less than the time constant B τ-value of the heating curve as pair conduction as the time constant D τ-value of the heating curve of main conduction, namely gained predicts the outcome rationally.

Wherein, D τ=-Δ t/ln ((T _d2-T _d1)/(T _d1-T _d0)), B τ=-Δ t/ln ((T _k2-T _k1)/(T _k1-T _k0)).

When determining to predict the outcome unreasonable, then switching to guardian mode, showing the temperature data of popping one's head in and detecting in real time.

The structural representation of a kind of body temperature measuring device disclosed in another embodiment of the present invention is shown see Fig. 2.

As shown in Figure 2, this device comprises: actual heating curve construction unit 1, constant duration point determining unit 2, first computing unit 3 and the second computing unit 4.

Wherein, the temperature data that actual heating curve construction unit detects for obtaining temperature probe, builds actual heating curve.Wherein, described actual heating curve can regard as the first ideal rising temperature curve and the matching of secondary ideal heating curve forms.

And then constant duration point determining unit determines four constant duration points in described actual heating curve, and the actual temperature that each constant duration point is corresponding.

First computing unit is for calculating each constant duration o'clock the first ideal temperature corresponding on the first ideal rising temperature curve and secondary ideal temperature corresponding on secondary ideal heating curve according to presetting equation group;

Second computing unit, for based on newton's conduction of heat formula, described first ideal temperature corresponding according to each constant duration point or described secondary ideal temperature, prediction human body temperature.

It should be noted that, in other embodiments disclosed by the invention, this actual heating curve construction unit specifically comprises data prediction subelement and curve structure subelement.Wherein,

Data prediction subelement is used for carrying out Filtering Processing to the temperature data that temperature probe detects, deletes irrational temperature data.And then curve builds subelement and builds heating curve according to the temperature data after process.

It should be noted that this device embodiment is corresponding with embodiment of the method, its implementation is identical with execution principle, and therefore not to repeat here.

Finally, also it should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.

In this description, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.

To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims (9)

1. a body temperature measurement method, is characterized in that, comprising:

Obtain the temperature data that temperature probe detects, build actual heating curve, wherein said actual heating curve can regard as the first ideal rising temperature curve and the matching of secondary ideal heating curve forms;

Determine four constant duration points in described actual heating curve, and the actual temperature that each constant duration point is corresponding;

Each constant duration o'clock the first ideal temperature corresponding on the first ideal rising temperature curve and secondary ideal temperature corresponding on secondary ideal heating curve is calculated according to default equation group;

Based on newton's conduction of heat formula, described first ideal temperature corresponding according to each constant duration point or described secondary ideal temperature, prediction human body temperature.

2. method according to claim 1, is characterized in that, also comprises before the actual heating curve of described structure:

Filtering Processing is carried out to the temperature data that temperature probe detects, deletes irrational temperature data.

3. method according to claim 1, is characterized in that, described default equation group is:

$\left\{\begin{array}{c}{T}_0=\left(1-coef\right)*T_{d0}+coef*T_{k0}\\ T_1=\left(1-coef\right)*T_{d1}+coef*T_{k1}\\ T_2=\left(1-coef\right)*T_{d2}+coef*T_{k2}\\ T_3=\left(1-coef\right)*T_{d3}+coef*T_{k3}\\ T_{k0}=T_0\\ \left(T_{k1}^2-T_{k0}{T}_{k2}\right)/\left(2T_{k1}-T_{k0}-T_{k2}\right)=\left(T_{d1}^2-T_{d0}{T}_{d2}\right)/\left(2T_{d1}-T_{d0}-T_{d2}\right)\\ \left(T_{k2}-T_{k1}\right)/\left(T_{k1}-T_{k0}\right)=\left(T_{k3}-T_{k2}\right)/\left(T_{k2}-T_{k1}\right)\\ \left(T_{d2}-T_{d1}\right)/\left(T_{d1}-T_{d0}\right)=\left(T_{d3}-T_{d2}\right)/\left(T_{d2}-T_{d1}\right)\end{array}\right.$

Wherein, T ₀, T ₁, T ₂, T ₃for constant duration point t ₀, t ₁, t ₂, t ₃corresponding actual temperature, T _d0, T _d1, T _d2, T _d3for constant duration point t ₀, t ₁, t ₂, t ₃the first corresponding ideal temperature, T _k0, T _k1, T _k2, T _k3for constant duration point t ₀, t ₁, t ₂, t ₃corresponding secondary ideal temperature, coef is preset relation proportionality coefficient.

4. method according to claim 3, is characterized in that, described based on newton's conduction of heat formula, described first ideal temperature corresponding according to each constant duration point or described secondary ideal temperature, and prediction human body temperature, comprising:

Based on preset formula $T_F=(T_{d1}^2-T_{d0}{T}_{d2})/(2T_{d1}-T_{d0}-T_{d2})$ Or prediction body temperature, wherein, T _ffor final equilibrium temperature.

5. method according to claim 3, is characterized in that, described based on newton's conduction of heat formula, described first ideal temperature corresponding according to each constant duration point or described secondary ideal temperature, and prediction human body temperature, also comprises afterwards:

Whether checking predicts the outcome reasonable, then shows the temperature data of popping one's head in and detecting if not in real time;

Wherein, when the time constant D τ that the first ideal rising temperature curve is corresponding is less than time constant B τ corresponding to secondary ideal heating curve, determine to predict the outcome rationally;

D τ=-Δ t/ln ((T _d2-T _d1)/(T _d1-T _d0)), B τ=-Δ t/ln ((T _k2-T _k1)/(T _k1-T _k0)), the time interval value of described Δ t constant duration point.

6. method according to claim 1, is characterized in that, described four the constant duration points determined in described actual heating curve, comprising:

With the maximum point of described warming temperature slope for initial point, based on described initial point, determine four constant duration points.

7. method according to claim 3, is characterized in that, the span of described coef is 0.2 ~ 0.4.

8. a body temperature measuring device, is characterized in that, comprising:

Actual heating curve construction unit, for obtaining the temperature data that temperature probe detects, builds actual heating curve, and wherein said actual heating curve can regard as the first ideal rising temperature curve and the matching of secondary ideal heating curve forms;

Constant duration point determining unit, for determining four constant duration points in described actual heating curve, and the actual temperature that each constant duration point is corresponding;

First computing unit, for calculating each constant duration o'clock the first ideal temperature corresponding on the first ideal rising temperature curve and secondary ideal temperature corresponding on secondary ideal heating curve according to presetting equation group;

Second computing unit, for based on newton's conduction of heat formula, described first ideal temperature corresponding according to each constant duration point or described secondary ideal temperature, prediction human body temperature.

9. device according to claim 8, is characterized in that, described actual heating curve construction unit:

Data prediction subelement, carries out Filtering Processing for the temperature data detected temperature probe, deletes irrational temperature data;

Curve builds subelement, for building heating curve according to the temperature data after process.