CN101126664A - Electronic thermometer - Google Patents

Abstract

The utility model relates to an electronic thermometer, comprising a temperature inducing component used for getting temperature signal and a temperature computing device which processes temperature signal. The temperature computing device transfers the temperature signal which the temperature inducing component gets into temperature value through combining the first sampling frequency and the second sampling frequency; wherein, the first sampling frequency is higher than the second sampling frequency. The core idea of the invention starts from the physiological consideration and makes more accurate and reliable and stable temperature measuring using fluctuation law of heat compensation caused by beating heart as a sampling frequency. Because the temperature computing device grasps real temperature rise-starting point and temperature value through a higher first sampling frequency before the similar or estimated second sampling frequency to heart beating frequency is combined to transfer the temperature signal which the temperature inducing component gets into a temperature value, temperature measurement is more stable; furthermore, a temperature predicting value can be made by using specific formula or counting method as predicting result of predicting body temperature measuring, so as to lower the measuring time.

Description

A kind of electronic thermometer

Technical field

The present invention relates to the analytical approach of a kind of temperature measuring equipment and temperature value, relate in particular to a kind of electronic thermometer.

Background technology

At present, in measurement, exist diversified thermometer, but main mercury clinical thermometer and electronic digital type clinical thermometer arranged body temperature.

The mercury clinical thermometer take temperature is to utilize the principle of expanding with heat and contracting with cold take temperature, and such clinical thermometer uses the glass tube encapsulation, and thermometric liquid adopts mercury, because its canals of stilling is frangible and contain mercury, so its security is poor.The electronic digital type clinical thermometer totally can be divided into two big classes: a kind of infrared thermometer that is based on the infrared rays survey method, another kind is based on the electronic thermometer of heat exchange pattern.Infrared thermometer can be measured the body temperature at the ear position of human body, measuring speed is fast, can obtain the result in a second, and can store repeatedly temperature data, this body temperature can be finished start, thermometric, preservation data, check functions such as data, shutdown in respect of a plurality of control knob; Its course of work is: after pressing the thermometric control knob, infrared ray intercepting temperature signal is treated and transfer digital signal to and be sent to liquid crystal display displays temperature value; Electronic thermometer adopts direct heat transmission method take temperature, be fit to traditional measurement of bldy temperature mode: in the oral cavity, oxter, rectum carry out measurement of bldy temperature to human body, this thermometer is generally only established a thermometric button, press the thermometric control knob and just start temperature measurement controller work, controller will be with the temperature signal of fixing frequency collection temperature measuring head, and temperature signal is converted to digital signal send liquid crystal display displays temperature value.

And currently used electronic digital type clinical thermometer generally all has the function that the related temperature data that records is analyzed when the surveying work of finishing body temperature.

As some heat conduction formula electronic thermometers of present existence, because the resistance value of its sensor is comparatively sharp to temperature variation, and generally linear in the body temperature that human body measures.Generally speaking, when these electronic thermometers measure body temperatures, measure frequency and be second sampling once, when sensor and human body temperature reach thermal equilibrium, displays temperature value on its LCDs then.

But in fact, people and some animals are constant temperature, and as in human body, the heat energy that muscle produces is along with the circulation system is delivered to each tissue of human body.Heart shrinks with fixed frequency, intraventricular blood is sent, during diastole, blood then enters the atrium from the circulation system, therefore to enter arterial system be a burst of to blood, and the compensation of heat energy also is along with the contraction of heart and diastole, via the blood transmission of the circulation system.When using clinical thermometer to measure, the moment that clinical thermometer contacts with measurement sites, surface skin heat energy can be walked by the detecting part bit strip of clinical thermometer, cause the vessel retraction in the contact range, the heat energy that compensates in this contact range is then sent to by blood, the mode of sending to is by heart contraction and diastole, and is a burst of; According to medical statistics, the average heartbeat of the adult of general health is about per minute 72 times.Its temperature sampling frequency of electronic thermometer of using located by prior art be second sampling once, and be in the process of thermometric to reaching thermally equilibrated definition, obtain the summation that temperature value changes in continuous 4 or 8 seconds and be less than or equal to 0.1 ℃; Sampling in one second is once asynchronous with the thermal compensation frequency that transmits via palmic rate, cause the temperature value phase place difference that obtains, it may be the high point of wave band, it also may be low spot, particularly near heat balance point the time, the temperature value of obtaining in out of phase is to judging whether that reaching thermally equilibrated has the greatest impact, and often the temperature value of getting out of phase because of mistake is sent ahead of time and measured the signal that finishes, so that cause in medical clinical test and mercury clinical thermometer relatively after, the result that measured value is on the low side.Therefore, if at this time electronic thermometer can be with the heartbeat frequency as the temperature sampling frequency, thus, the temperature sampling frequency of electronic thermometer just and the compensating frequency of blood transmission heat energy synchronous, Temperature Compensation is stable, and measurement result is inevitable more accurate, more reliable.Simultaneously, if the temperature value of the temperature signal that will in same phase, be obtained conversion via specific formula or algorithm computation after, promptly can obtain an efficient temperature predicted value,, can also reduce the measurement time in a large number as predicting the outcome that prediction type body temperature measures.

Summary of the invention

Have in view of that, the present invention's purpose is to provide a kind of more accurate, more reliable and more stable electronic thermometer of temperature of measuring.

For achieving the above object, the technical solution adopted in the present invention is:

A kind of electronic thermometer, comprise the temperature computing device that is used to obtain the temperature sense assembly of temperature signal and carries out processes temperature signal, wherein, the temperature signal that described temperature computing device is obtained the temperature sense assembly in conjunction with second sampling frequency by first sampling frequency is converted to temperature value, accurately measure body temperature, wherein first sampling frequency is higher than second sampling frequency.

Preferable, described first sampling frequency is 〉=2.0 hertz high frequency, after start to the preceding employing of starting working of second sampling frequency; Second sample period was

Low frequency.

Preferable, described first sampling frequency is 〉=2.0 hertz high frequency, after start to the preceding employing of starting working of second sampling frequency; The second sampling frequency value is for seeing through the approximate pulse frequency after estimating.

Preferable, when described electronic thermometer has just been started shooting, carry out measuring temp with first sampling frequency, from detecting for the second time temperature, when the temperature that detects reaches particular value greater than the temperature that last time detected,, change with second sampling frequency and carry out measuring temp next time as more than 0.2 degree centigrade.

Preferable, the described second sampling frequency value is for seeing through the approximate pulse frequency after the estimation, and to be accounting temperature climb mistiming of first to second point of inflexion of curve to the time its evaluation method, is used as the second sampling frequency value with its inverse.

Preferable, the described second sampling frequency value is for seeing through the approximate pulse frequency after the estimation, and to be accounting temperature climb first mistiming to the n point of inflexion of curve to the time its evaluation method, behind n-1, wherein, n is the positive integer greater than 1, is used as the second sampling frequency value with its inverse.

Preferable, when described electronic thermometer has just been started shooting, carry out measuring temp with first sampling frequency, after estimating the second sampling frequency value, change with second sampling frequency and carry out measuring temp next time.

Preferable, described with the obtained specific individual value of first sampling frequency obtained and not switching after switching to specific obtained after second sampling frequency value or switching to second sampling frequency, via obtaining a predicted value after specific formula or the algorithm computation, to reduce the measurement time as measurement.

Preferable, described temperature sense assembly comprises temperature sensor, as thermistor.

Compare with located by prior art, its temperature sampling frequency of electronic thermometer of using located by prior art is to take a sample once a second, and be in the process of thermometric, to obtain the summation that temperature value changes in continuous 4 or 8 seconds and be less than or equal to 0.1 ℃ reaching thermally equilibrated definition; Use is asynchronous with the thermal compensation frequency that transmits via palmic rate with second sampling frequency once, cause the temperature value phase place difference that obtains, it may be the high point of wave band, it also may be low spot, particularly the time near heat balance point, the temperature value of obtaining in out of phase is to judging whether that reaching thermally equilibrated has the greatest impact, often send ahead of time and measure the signal that finishes because of the temperature value of getting out of phase by mistake, so that cause in medical clinical test and mercury clinical thermometer relatively after, the result that measured value is on the low side.Electronic thermometer of the present invention proposes to improve one's methods to the disappearance of above-mentioned located by prior art, because Electricity thermometer of the present invention comprises temperature sense assembly and temperature computing device, can be by the first higher sampling frequency, really grasp temperature begin to climb time point and temperature value, the pulse frequency that must be bordering on heartbeat afterwards again in conjunction with approximate or estimation is that the conversion of signals that second sampling frequency is obtained the temperature sense assembly is a temperature value, and wherein first sampling frequency is higher than second sampling frequency.Because, when using clinical thermometer to measure, the moment that clinical thermometer contacts with measurement sites, surface skin heat energy can be walked by the detecting part bit strip of clinical thermometer, cause the vessel retraction in the contact range, compensate that heat energy in this contact range then sent to by blood, the mode of sending to is by heart contraction and diastole, and is a burst of; According to medical statistics, the average heartbeat of the adult of general health is about per minute 72 times.Electronic thermometer of the present invention with the heartbeat frequency as the temperature sampling frequency, thus, the temperature sampling frequency just and blood to transmit the compensating frequency of heat energy synchronous, Temperature Compensation is stable, measurement result certainty is more accurate, more reliable.If again the temperature value of the conversion of signals that the temperature sense assembly is obtained via specific formula or algorithm computation after, promptly can obtain a temperature prediction value, as predicting the outcome that prediction type body temperature measures, reduce the measurement time in a large number.

Description of drawings

Fig. 1 is the basic structure block diagram of the electronic thermometer of preferable first embodiment of the present invention.

Fig. 2 is the process flow diagram of the fundamental measurement temperature of the electronic thermometer of preferable first embodiment of the present invention.

Fig. 3 is the measured temperature and time graph of relation of electronic thermometer of preferable first embodiment of the present invention.

Fig. 4 is the measured temperature and time graph of relation of the electronic thermometer of located by prior art.

Fig. 5 judges the step block diagram of peak-peak for the electronic thermometer of preferable first embodiment of the present invention.

Fig. 6 is the circuit structure diagram of the electronic thermometer of preferable first embodiment of the present invention.

Fig. 7 is the process flow diagram of the concrete measurement temperature of the electronic thermometer of preferable first embodiment of the present invention.

Fig. 8 is the circuit structure diagram of the electronic thermometer of preferable second embodiment of the present invention.

Fig. 9 is the process flow diagram of the concrete measurement temperature of the electronic thermometer of preferable second embodiment of the present invention.

Figure 10 is the circuit structure diagram of the electronic thermometer of preferable the 3rd embodiment of the present invention.

Figure 11 is the process flow diagram of the concrete measurement temperature of the electronic thermometer of preferable the 3rd embodiment of the present invention.

Figure 12 is the circuit structure diagram of the electronic thermometer of preferable the 4th embodiment of the present invention.

Figure 13 is the process flow diagram of the concrete measurement temperature of the electronic thermometer of preferable the 4th embodiment of the present invention.

Embodiment

For the purpose, technical scheme, the advantage that make the present invention is clearer and more definite, clear, the present invention's technical scheme is described in further detail below in conjunction with embodiment, accompanying drawing.

Electronic thermometer core concept of the present invention is to be thought of as starting point from physiology, as sampling frequency, carries out more accurate, more reliable and more stable temperature survey with heartbeat.

As shown in Figure 1, be the basic system block diagram of a kind of electronic thermometer in preferable first embodiment of the present invention, it mainly comprises: temperature sense assembly 11 comprises and is used for the temperature sensor 12 of sensing temperature signal and the sensed temperature conversion of signals is analog to digital converter or resistance-frequency converter 13, carries out hummer 16 and the switch 17 that the liquid crystal display 15 of temperature computing device 14, displays temperature and/or the palmic rate of analyzing and processing, temperature value that expression measures have become stable in conjunction with temperature signal and palmic rate.

Wherein, temperature sensor 12 is thermistor or other thermal transducer.

When electronic thermometer is used on clinical treatment or the home care, temperature sensor 12 can be positioned over the mouth of human body, in oxter or the rectum, variation with sensing temperature, after switch 17 is opened, temperature sensor 12 sensing temperatures also are converted to the electric signal of simulation, this electric signal makes analog signal convert digital signal to via analog to digital converter or resistance-frequency converter 13, digital signal is input to temperature computing device 14, through the processing of temperature computing device 14 result is reached liquid crystal display 15 and show, and become stable by hummer 16 temperature value that expression measures of sounding.

But more accurate for obtaining, more reliable measured temperature, the temperature computing device 14 of the electronic thermometer of present embodiment is taken a sample according to the jumping frequency rate of heart and is handled, 14 pairs of temperature signals of temperature computing device are taken a sample and are handled and can realize by dual mode, specifically operate following description:

As shown in Figure 2, the program flow diagram for the present embodiment work of electronic thermometer mainly may further comprise the steps:

Step 201 is pressed switch 17, starts, so that the internal circuit conducting of electronic thermometer;

Step 202, temperature computing device 14 carries out initialization;

Step 203, what electronic thermometer sensed is outside environment temperature, temperature sensor 12 sensing temperatures also are converted to the electric signal of simulation, this electric signal makes analog signal convert digital signal to via analog to digital converter or resistance-frequency converter 13, digital signal is input to temperature computing device 14, because electronic thermometer is positioned in the air when beginning always, so temperature sensor 12 is to be in outside environment temperature to keep thermal equilibrium state all the time.

Promptly as shown in Figure 3, be temperature sensor 12 sensed temperature values and time relation figure, in Fig. 3, temperature computing device 14 can first sampling frequency be taken a sample, this first sampling frequency equals 10 hertz, be the sampling frequency of the 0th second～t second among Fig. 3, sampling frequency is faster, the time point that more can accurate response heats up.

The temperature value that temperature computing device 14 is handled is ambient temperature value and outputs to liquid crystal display 15 demonstrations.

Step 204, temperature computing device 14 judge whether temperature raises, if judge intensification, then use second sampling frequency as sampling frequency, the real time reaction temperature variation; If do not heat up, temperature computing device 14 continues with the sampling of first sampling frequency, till automatic shutdown;

Judge whether temperature raises, and mainly is to judge within a certain period of time, whether the variation of temperature value with 10 hertz of samplings of frequency, heated up when being higher than the default value that presets as above-mentioned greater than the default value that presets in per 1/10th seconds, as 0.1 ℃, promptly judged this moment to begin to heat up.

Step 205, when being judged to be intensification, be that temperature sensor 12 contacts thermal source since time t, temperature sensor 12 sensing temperatures and be converted to the electric signal of simulation then, this electric signal makes the electric signal of simulation convert digital signal to via analog to digital converter or resistance-frequency converter 13, and digital signal is input to temperature computing device 14.

Because during temperature sensor 12 contact thermals source, be not just to reach thermal equilibrium state at once, but the process of an intensification arranged, promptly as shown in Figure 3 from being a temperature rise period between t second～25th second with thermal source.

After the intensification condition is established, sampling frequency changes the sampling frequency as Fig. 3 t second～25th second into, promptly take a sample with second sampling frequency, the heating curve that measures just with represented the same of Fig. 3, owing to heart contraction, blood transport heat energy, can measure the palmic rate of a wave-wave heat energy representative, obtain as the represented temperature of curve among Fig. 3 21 curve over time, and the temperature that curve 22 is temperature computing devices 14 to be calculated according to second sampling frequency curve over time.

According to medical statistics, the average heartbeat of the adult of general health is about 72 times/minute, frequency is 1.2 hertz, so after heating up, second sampling frequency can for 1.2 hertz of heartbeats as the electronic thermometer sampling frequency, because this sampling frequency and palmic rate are synchronous, during the electronic thermometer measuring temperature, obtain the same phase place of the thermal compensation consistent with palmic rate at each time point, it is more stable so to measure the temperature that the obtains curve that climbs.

Judge that whether the temperature among temperature and time relation curve Fig. 3 reaches peak value, can reach by the method as Fig. 5.

As shown in Figure 5, be used for judging because of blood along with in systaltic flow caused hot offset temperature and the time plot, whether measuring temperature arrives the step process figure of peaking, its key step comprises:

Step 501, peak value is judged beginning;

Step 502, the curve of 14 pairs of temperature and times of temperature computing device carries out differentiate, that is:

$P_n=\frac{T_n-T_{n-1}}{t_n-t_{n-1}}---\left(1\right)$

Wherein, T _nBe moment t _nThe temperature that senses, T _N-1Be moment t _N-1The temperature that senses is then judged P _N-1＞0 and P _nWhether=0 set up, if establishment, then t _nTemperature constantly is a peak-peak, and temperature computing device 14 is at t _nSampling, otherwise do not take a sample.Simultaneously, also can judge whether to exist peak value by step 503.

Step 503, or, judge P _N-1＞0 and P _N-1* P _nWhether＜0 set up, if set up, then has peak value to exist, and gets t _nTemperature constantly is a peak-peak.

Step 504 is determined T _nBe peak-peak.

Can the accounting temperature peak value by above-mentioned method, make electronic thermometer obtain the mxm. of each ripple ascending temperature at each Ge time point, make probe temperature stable; Because same phase, thermal equilibrium stage after t=25 particularly, its probe temperature value will can not, as shown in Figure 4, be about using the measured temperature and time graph of relation of electronic thermometer of located by prior art, use the temperature sampling frequency As of located by prior art electronic thermometer to take a sample once in one second, the sampling phase difference, and cause the probe temperature value to fluctuate up and down, thus, contrast uses electronic thermometer of the present invention to obtain the method for probe temperature with palmic rate, except the summation that can satisfy temperature variation in continuous 4 or 8 seconds is less than or equal to 0.1 ℃ requirement, make measuring temp more stable outside, can utilize simultaneously above-mentioned and same phase place of palmic rate or the highest peak value, calculate the mistiming of same phase place and peak-peak, this mistiming is promptly being represented the heartbeat required time one time, can calculate patient's HR Heart Rate with this mistiming, perhaps calculate patient's HR Heart Rate with the time difference between two adjacent points of inflexion.

Step 206, temperature computing device 14 can judge whether temperature sensor 12 reaches thermal equilibrium with its thermal source that is contacted, if reach thermal equilibrium, and then execution in step 207 and step 208;

Otherwise, always with the second sampling frequency real time reaction temperature variation, up to can judge reach thermal equilibrium till.

Above-mentionedly judging whether to reach thermal equilibrium, mainly is according within a certain period of time, and whether the changing value of probe temperature is lower than the default value that presets, if be lower than the default value that presets, just expression has reached thermal equilibrium.

After judgement reaches thermal equilibrium, the curve of temperature and time will be relatively stable, but the electronic thermometer of commonly using is because the sampling phase difference, cause the temperature value of sampling to fluctuate up and down, as the graph of relation of the temperature and time of Fig. 4 since actual temperature and time relation curve fluctuation ratio is bigger up and down, so the fluctuation of the temperature and time relation curve that temperature computing device 14 calculates is also bigger, unfavorable judgement within a certain period of time, whether the variation of temperature value is lower than the default value that presets.Electronic thermometer of the present invention is because the sampling phase of temperature is identical, thermal equilibrium stage after 25 seconds time particularly, the relation curve of its temperature and time will be more smooth, the summation that then can satisfy temperature variation in continuous 4 or 8 seconds rapidly is less than or equal to 0.1 ℃ requirement, makes measuring temp more accurately stable.

Step 207, temperature computing device 14 with the measurement temperature after the computing and the HR Heart Rate after calculating be sent to liquid crystal display 15;

Step 208, temperature computing device 14 represents that by driving hummer 16 temperature value that measures has become stable.

Above-mentioned being mainly by the basic structure block diagram of electronic thermometer described basic process and the measuring principle thereof that electronic thermometer of the present invention is measured temperature, below again the particular circuit configurations figure of the electronic thermometer by better embodiment of the present invention to describe be how to realize above-mentioned measuring process and measure temperature.

As shown in Figure 6, be the particular circuit configurations figure of the preferable first embodiment electronic thermometer of the present invention.The electronic thermometer of present embodiment mainly comprises switch 600, temperature sense assembly 601, temperature computing device 602, liquid crystal display 603 and hummer 604, wherein temperature sense assembly 601 comprises oscillator 605, temperature sensor 606, estimate device 607 sample time, sample time, controller 608, resistance-frequency converter or analog-digital converter 609, wherein temperature computing device 602 comprises measuring value counter buffer 610, original bulk measured value buffer 611, data comparator 612, maximum amount measured value buffer 613, sexadecimal value converter 614, display driver 615, audio drivers 616, clock generator 617, wherein clock generator 617 comprises temperature stabilization time counter 618.

The detailed process that the foregoing invention electronic thermometer is measured temperature as shown in Figure 7, its main process comprises:

Step 701 starts;

Electronic thermometer brings into operation; Start the switch 600 of electronic thermometer, oscillator 605 produces basic system works frequency, drives the entire circuit system;

Step 702, initial value is set;

Being about to default value inserts in each controller in circuit;

When electronic thermometer started, the preset temperature of the temperature value of these original bulk measured value buffer 611 storages and 613 storages of maximum amount measured value buffer can be predisposed to zero, also can be predisposed to some specific temperature values;

Step 703 measures environment temperature and shows measurement;

Promptly carry out environment temperature measuring, the measurement value is stored in original bulk measured value buffer 611 and maximum temperature buffer 613, and is converted to temperature value, is shown on the liquid crystal display 603;

Oscillator 605 drives clock generator 617, and clock generator 617 produces various frequency preset and associated control signal output then.

Estimate that device 607 determines sample time according to default sampling frequency value sample time, via controller 608 sample time, when beginning to measure, export primary sampling control signal, then should sample time controller 608 controlling resistance frequency converters or analog-digital converter 609 will come from temperature sensor 606 obtained temperature signals and change digital signal into, inlet measured value counter buffer 610 is calculated as digital measurement value.

Above-mentioned measurement value is stored to original bulk measured value buffer 611, and via data comparator 612 with relatively at the initial value of 613 li of maximum temperature buffers, if the measurement value is greater than the initial value of 613 li of maximum temperature buffers, then the measurement value is stored to maximum temperature buffer 613 and replaces initial value, and export the temperature prediction module to.Owing to be to measure for the first time, its value is inevitable greater than initial value, so action must take place.

With the measurement value via sexadecimal value converter 614 convert to decimal data again transmission display driver 615 drive liquid crystal displays 603 temperature value shown.

Step 704 is with detecting of first sampling frequency and demonstration measurement;

Promptly carry out measuring temp next time with first sampling frequency, the measurement value is shown on the liquid crystal display 603 if greater than mxm. before, then this measurement value is stored in the maximum temperature reservoir and is converted to temperature value.In this method, first sampling frequency is more than or equal to more than 2 hertz, and the frequency that is preferably first sampling frequency more than 10 hertz is carried out measuring temp, so that grasp the time point that body temperature begins to measure more accurately.

Clock generator 617 produces the associated control signal output of next time taking a sample.

Estimate that device 607 is according to default first sampling frequency decision sample time sample time, via controller 608 sample time, the output sampling control signal, controlling resistance frequency converter or analog-digital converter 609 will come from temperature sensor 606 obtained temperature signals and change digital signal into, and inlet measured value counter buffer 610 is calculated as digital measurement value.

With above-mentioned measurement value via data comparator 612 with relatively at the initial value of 613 li of maximum temperature buffers, if, then being stored to the measurement value maximum temperature buffer 613 greater than the former storage values of 613 li of maximum temperature buffers, the measurement value replaces former storage values.The measurement value except that via the former storage values of 613 li of data comparator 612 and maximum temperature buffers relatively, also compare via the value of data comparator 612 with original bulk measured value buffer 611, if the measurement value surpasses the default value that presets greatly than the value of original bulk measured value buffer 611, for example be about more than 0.2 degree centigrade after the conversion, then produce a signal in order to triggering clock generator 617 transform sampling frequencies, as be for conversion into second sampling frequency. otherwise be the first sampling frequency repeating step 704 with same frequency promptly.

With the measurement value via sexadecimal value converter 614 convert to decimal data again transmission display driver 615 drive liquid crystal displays 603 temperature value shown.Output signal makes zero the temperature stabilization time counter 618 in the clock generator 617 simultaneously.

If the measurement value does not then have any subsequent action less than the former storage values of 613 li of maximum temperature buffers.

Does step 705 heat up greater than the default value that presets?

If the temperature that detects measurement value for the first time exceeds the default value that presets, as more than 0.2 degree centigrade, represent clinical thermometer to begin measuring temperature, skip to step 707; Otherwise expression still stops and does not also begin the body temperature measurement at ambient temperature.

In the step 704, the measurement value except that via the former storage values of 613 li of data comparator 612 and maximum temperature buffers relatively, also compare via the value of data comparator 612 with original bulk measured value buffer 611, if the measurement value surpasses the default value that presets greatly than the value of original bulk measured value buffer 611, for example be about more than 0.2 degree centigrade after the conversion, then produce a signal in order to trigger clock generator 617 transform sampling frequencies.Otherwise the temperature stabilization time counter 618 that output signal is given in the clock generator 617 adds one unit interval of meter.

Otherwise expression still stops at ambient temperature and measures, and whether the time of further judging environment temperature measuring is above preset time, if then directly enter step 710 and shut down automatically, if also above preset time, then proceed environment temperature measuring.

Is step 706 greater than the default time that presets?

In the time of presetting, as 3 minutes, the temperature that detects did not rise and reaches the default value that presets, as more than 0.2 degree centigrade, and then shutdown automatically.

When measuring the value of end value when surpassing the default value that presets than original bulk measured value buffer 611, for example be about 0.2 degree centigrade after the conversion, then the temperature stabilization time counter 618 that gives in the clock generator 617 of output signal adds one unit interval of meter.If the temperature stabilization time counter 618 in the clock generator 617 reaches when being equal to a default time, as 3 minutes, then clock generator 617 produced a signal, automatically shutdown.If the temperature stabilization time counter 618 in the clock generator 617 is less than this default time, promptly with the identical first sampling frequency repeating step, 704 actions.

Step 707, the detecting of second sampling frequency also shows measurement;

The first time, the measurement value exceeded the default value that presets when the temperature that detects, as more than 0.2 degree centigrade, represent clinical thermometer to begin to measure body temperature, for obtaining the temperature compensation synchronous with heartbeat, switch to second sampling frequency, this second sampling frequency can be synchronous with palmic rate, and as being that second sampling frequency is carried out measuring temp with 1.2 hertz, or this second sampling frequency can be equal in the cycle of adopting Frequency so that make sampling frequency and human body heartbeat reach the purpose that each value is all in the same way the position synchronously.

Utilize and estimate device 607 sample time according to default second sampling frequency decision sample time, this second default sampling frequency Yu cycle is equal to

Frequency; Via controller 608 sample time, the output sampling control signal, controlling resistance frequency converter or analog-digital converter 609 will come from temperature sensor 606 obtained temperature signals and change digital signal into, and inlet measured value counter buffer 610 is calculated as digital measurement value.

With above-mentioned measurement value via data comparator 612 with relatively at the former storage values of 613 li of maximum temperature buffers, if, then being stored to the measurement value maximum temperature buffer 613 greater than the former storage values of 613 li of maximum temperature buffers, the measurement value replaces former storage values.And with the measurement value via sexadecimal value converter 614 convert to decimal data again transmission display driver 615 drive liquid crystal displays 603 temperature value shown.Output signal makes zero the temperature stabilization time counter 618 in the clock generator 617 simultaneously.

If the measurement value is less than the former storage values of 613 li of maximum temperature buffers, then the temperature stabilization time counter 618 that gives in the clock generator 617 of output signal adds one unit interval of meter, but output signal is not given sexadecimal value converter 614.

Whether step 708 has reached thermal equilibrium;

Judgement is in a period of time, and as 4 seconds, 8 seconds or 16 seconds, whether the temperature value that measures continues was risen, if do not measure higher temperature value, represents clinical thermometer and subject temperature to be tending towards thermal equilibrium, and output immediately measures finishes signal.If when obtaining the higher temperature value, then continue to measure.

Temperature stabilization time counter 618 in the clock generator 617 reaches when being equal to a default time, as 4 seconds, in 8 seconds or 16 seconds, if the former storage values that the maximum temperature buffer is 613 li is not substituted always, then represent in this default time, all do not obtain the higher temperature value, this moment, clock generator 617 meetings triggered audio drivers 616 with a specific time sequence.

If judge also not reach thermal equilibrium, then repeating step 706.

Step 709, liquid crystal display 603 shows that the temperature value that hummer 604 sounding bulletins measure has become stable;

Liquid crystal display 603 continues the highest measuring value of demonstration, and in a period of time, as 4 seconds, 8 seconds or 16 seconds, if higher temperature value occurs, then a series of the or default sound can take place hummer 604, represents the temperature value that measures to become stable.

Step 710, shutdown automatically.

After liquid crystal display 603 continues to show one section default time, after 10 minutes, shutdown automatically.

Foregoing description be the circuit structure and the course of work of first embodiment of the invention, but the present invention is not limited to this, also has numerous embodiments, and is as described below.

As shown in Figure 8, be the particular circuit configurations figure of the preferable second embodiment electronic thermometer of the present invention.Its basic structure and Fig. 6's is that the particular circuit configurations figure of the first embodiment electronic thermometer is similar substantially.Its difference is, obtains intensification starting point and accounting temperature to time climb first point of inflexion and second point of inflexion of curve via first sampling frequency faster, is used as second sampling frequency with the inverse of these two point of inflexion mistimings then, carries out measurement of bldy temperature.

After the start, default sample time, controller was first sampling frequency, and environment temperature is via temperature sensor, and converter and counter buffer obtain and deposit in the mxm. buffer.More whether the measuring temp value and the mxm. buffer of next counter buffer begin a large amount of intensifications via data comparison buffer.If not, counter buffer deposits the mxm. buffer in and detects automatic shutdown always, and slope buffer 1 makes zero simultaneously.Be then to obtain heating up starting point time and obtain slope value simultaneously to slope buffer 1.

After the intensification sampling, the counter buffer Data Update.Buffer 1 moves to buffer 2 and buffer 1 compares the buffer renewal via data, the slope difference deposits slope buffer 1 and slope buffer 2 in regular turn via estimating the relatively slope difference of serial sampling of device sample time before and after being obtained than buffer by slope ratio simultaneously, can obtain the slope for the first time point of inflexion and the point of inflexion for the second time, and simultaneously by estimating that device records this interval time to controller sample time, makes temperature sample rate and heart rates synchronous sample time.

Perhaps obtain intensification starting point and accounting temperature to climb first point of inflexion to the n point of inflexion of curve of time via first sampling frequency faster, then with this n point of inflexion averaging time difference inverse be used as second sampling frequency, carry out measurement of bldy temperature.

Then the course of work of second embodiment as shown in Figure 9, its course of work is similar to the course of work of first embodiment, and is specific as follows described.

Step 901 starts;

Electronic thermometer brings into operation, and when starting electronic thermometer switch 801, oscillator 802 produces basic system works frequency, drives the entire circuit system.

Step 902, initial value is set;

At first carry out initial setting work, default value is inserted in each controller in circuit.

Step 903 measures environment temperature and shows measurement;

Promptly carry out environment temperature measuring, the measurement value is stored in original bulk measured value buffer and maximum temperature reservoir, and is converted to temperature value,

Oscillator 802 drives clock generator 803, and clock generator 803 can produce various frequency preset and associated control signal output then.

Utilize and estimate that device 804 determines sample time according to default sampling frequency value sample time, via controller 805 sample time, when beginning to measure, export primary sampling control signal, controlling resistance frequency converter or analog-digital converter 806 will come from temperature sensor 807 obtained temperature signals and change digital signal into, and inlet measured value counter buffer 808 is calculated as digital measurement value.

Above-mentioned measurement value is stored to original bulk measured value buffer 809, and via data comparator 810 with relatively at the initial value of 811 li of maximum temperature reservoirs, if, then being stored to the measurement value maximum temperature reservoir 811 greater than the initial value of 811 li of maximum temperature reservoirs, the measurement value replaces initial value.Owing to be to measure for the first time, its value is inevitable greater than initial value, so action must take place.

With the measurement value via sexadecimal value converter 812 convert to decimal data again transmission display driver 813 drive liquid crystal displays 814 temperature value shown.

Step 904, the detecting of first sampling frequency also shows measurement;

Promptly carry out measuring temp next time with the frequency of first sampling frequency, the measurement value is shown on the liquid crystal display 814 if greater than mxm. before, then this measurement value is stored in the maximum temperature reservoir and is converted to temperature value.

The present invention is with greater than more than 2 hertz, and preferably the frequency of first sampling frequency more than 10 hertz is carried out measuring temp, so that grasp the time point that body temperature begins to measure more accurately.

Clock generator 803 produces the associated control signal output of next time taking a sample.

Utilize and estimate that device 804 is according to default first sampling frequency decision sample time sample time, via controller 805 sample time, the output sampling control signal, controlling resistance frequency converter or analog-digital converter 806 will come from temperature sensor 807 obtained temperature signals and change digital signal into, and inlet measured value counter buffer 808 is calculated as digital measurement value.

With above-mentioned measurement value via data comparator 810 with relatively at the former storage values of 811 li of maximum temperature reservoirs, if, then being stored to the measurement value maximum temperature reservoir 811 greater than the former storage values of 811 li of maximum temperature reservoirs, the measurement value replaces former storage values.And with the measurement value via sexadecimal value converter 812 convert to decimal data again transmission display driver 813 drive liquid crystal displays 814 temperature value shown.Simultaneously the measurement value being stored to buffer 1 and output signal makes zero the temperature stabilization time counter 818 in the clock generator 803.The value of buffer 1 is stored to buffer 2 819 again.

If the measurement value does not then have any subsequent action less than the former storage values of 811 li of maximum temperature reservoirs.

Does step 905 heat up greater than the default value that presets?

If the temperature that detects measurement value for the first time exceeds the default value that presets, as more than 0.2 degree centigrade, represent clinical thermometer to begin to measure body temperature, skip to step 907, otherwise represent that still stop does not also begin body temperature at ambient temperature and measures.

In the step 904, the measurement value except that via the former storage values of 811 li of data comparator 810 and maximum temperature reservoirs relatively, also compare via the value of data comparator 810 with original bulk measured value buffer 809, if the measurement value surpasses the default value that presets greatly than the value of original bulk measured value buffer 809, for example be about more than 0.2 degree centigrade after the conversion, then produce a signal in order to trigger clock generator 803 transform sampling frequencies.Otherwise the temperature stabilization time counter 818 that output signal is given in the clock generator 803 adds one unit interval of meter.

Is step 906 greater than the default time that presets?

When the temperature that detects within a certain period of time, as 3 minutes, rising reached the default value that presets, as more than 0.2 degree centigrade, then shutdown automatically.

Surpass the default value that presets when measuring the value of end value than original bulk measured value buffer 809, for example be about 0.2 degree centigrade after the conversion, then the temperature stabilization time counter 818 that gives in the clock generator 803 of output signal adds one unit interval of meter.When the temperature stabilization time counter 818 in the sequential generator 803 reaches when being equal to a default time, as 3 minutes, then clock generator 803 produced a signal, automatically shutdown.If the temperature stabilization time counter 818 in the clock generator 803 is less than this default time, promptly with 904 actions of same frequency (first sampling frequency) repeating step.

Step 907, the detecting of first sampling frequency also shows measurement;

The first time, the measurement value exceeded the default value that presets when the temperature that detects, and as more than 0.2 degree centigrade, represented clinical thermometer to begin to measure body temperature, carried out measuring temp.

If the measurement value surpasses the default value that presets greatly than the value of original bulk measured value buffer 809, for example be about more than 0.2 degree centigrade after the conversion, then produce a signal and produce the associated control signal output of next time taking a sample with former sampling frequency in order to trigger clock generator 803.

Utilize and estimate that device 804 is according to default first sampling frequency decision sample time sample time, via controller 805 sample time, the output sampling control signal, controlling resistance frequency converter or analog-digital converter 806 will come from temperature sensor 807 obtained temperature signals and change digital signal into, and inlet measured value counter buffer 808 is calculated as digital measurement value.

With above-mentioned measurement value via data comparator 810 with relatively at the former storage values of 811 li of maximum temperature reservoirs, if, then being stored to the measurement value maximum temperature reservoir 811 greater than the former storage values of 811 li of maximum temperature reservoirs, the measurement value replaces former storage values.And with the measurement value via sexadecimal value converter 812 convert to decimal data again transmission display driver 813 drive liquid crystal displays 814 temperature value shown.If the measurement value is less than the former storage values of 811 li of maximum temperature reservoirs, then the temperature stabilization time counter 818 that gives in the clock generator 803 of output signal adds one unit interval of meter, but output signal is not given sexadecimal value converter 812.

Simultaneously the measurement value being stored to buffer 1 and output signal makes zero the temperature stabilization time counter 818 in the clock generator 803.Utilize slope to calculate the difference that buffer 820 calculates buffer 1 and buffer 2 819, difference deposits slope buffer 1 in.Afterwards, the value of buffer 1 is stored to buffer 2 819 again.

Step 908 estimates out time interval between two points of inflexion, with as after spacing sweep time;

The variable quantity of time per unit temperature relatively simultaneously utilizes the time per unit temperature slope that climbs to transfer to by successively decreasing rising progressively and climb to the point of inflexion of time with estimated temperature.Because blood brings thermal source when defeated during each heartbeat, afterwards because external environment and clinical thermometer are taken away thermal source, progressively rises so the curve that climbs of temperature can become wavy.The time spacing of two points of inflexion is heart time one time.

Have dual mode, wherein a kind ofly be: utilize slope ratio than buffer 823 difference of slope buffers 1 and slope buffer 2 822 relatively, the value of slope buffer 1 is stored to slope buffer 2 822.

Repeating step 907, step 908 step if finding that slope transfers to by successively decreasing increases progressively, is then counted first point of inflexion, when starting the point of inflexion apart from estimation device 824.

Repeat 907, step 908 step finds that once more slope transfers to by successively decreasing when increasing progressively, and then counts second point of inflexion, and producing a signal this moment is second sampling frequency in order to trigger clock generator 803 conversion with the inverse of this two points of inflexion mistiming.Produce the associated control signal output of next time taking a sample.

Another kind of mode is: utilize slope ratio than the difference of buffer 823 comparison slope buffers 1 with slope buffer 2 822, the value of slope buffer 1 is stored to slope buffer 2 822.

Repeating step 907, step 908 step if finding that slope transfers to by successively decreasing increases progressively, is then counted first point of inflexion, when starting the point of inflexion apart from estimation device 824.

Repeating step 907, step 908 is found once more that slope transfers to by successively decreasing to increase progressively, and then counts second point of inflexion.The thermal compensation that transmits via blood in the temperature survey process is a ripple one ripple, makes the probe temperature value repeat the above-mentioned phenomenon of successively decreasing and increasing progressively to the slope of time curve, thereby forms and can obtain n the point of inflexion.

After finishing, producing a signal is second sampling frequency in order to the inverse that triggering clock generator 803 is transformed to this n point of inflexion difference averaging time.Produce the associated control signal output of next time taking a sample.

Step 909, the detecting of second sampling frequency also shows measurement;

With aforementioned two point of inflexion mistimings of calculating gained as after spacing sweep time so that make sampling frequency and human body heartbeat reach the purpose that each value is all in the same way synchronously.In theory, this mistiming is the mistiming of each heartbeat.

Utilize and estimate that device 804 determines sample time according to second sampling frequency sample time, via controller 805 sample time, the output sampling control signal, controlling resistance frequency converter or analog-digital converter (RFC or ADC) 806 will come from temperature sensor 807 obtained temperature signals and change digital signal into, and inlet measured value counter buffer 808 is calculated as digital measurement value.

With above-mentioned measurement value via data comparator 810 with relatively at the former storage values of 811 li of maximum temperature reservoirs, if, then being stored to the measurement value maximum temperature reservoir 811 greater than the former storage values of 811 li of maximum temperature reservoirs, the measurement value replaces former storage values.And with the measurement value via sexadecimal value converter 812 convert to decimal data again transmission display driver 813 drive liquid crystal displays 814 temperature value shown.Output signal makes zero the temperature stabilization time counter 818 in the clock generator 803 simultaneously.

If the measurement value is less than the former storage values of 811 li of maximum temperature reservoirs, then the temperature stabilization time counter 818 that gives in the clock generator 803 of output signal adds one unit interval of meter, but output signal is not given sexadecimal value converter 812.

Whether step 910 has reached thermal equilibrium;

Judgement is in a period of time, and as 4 seconds, 8 seconds or 16 seconds, whether the temperature value that measures continues was risen, if do not measure higher temperature value, represents clinical thermometer and subject temperature to be tending towards thermal equilibrium, and output immediately measures finishes signal.If obtaining the higher temperature value then continues to measure.

Temperature stabilization time counter 818 in the clock generator 803 reaches when being equal to a default time, as 4 seconds, 8 seconds or 16 seconds, representative was in this default time, all do not obtain the higher temperature value, this moment, clock generator 803 meetings triggered sounding driver 815 with a specific time sequence.

Step 911 liquid crystal display shows, the hummer sounding;

Liquid crystal display 814 continues the highest measuring value of demonstration, and in a period of time, as 4 seconds, 8 seconds or 16 seconds, if higher temperature value occurs, then a series of sound can take place hummer 816, represents the temperature value that measures to become stable.

814 of liquid crystal displays continue to show the highest measuring value.Sounding driver 815 drives hummer 816 and produces the default sound.

Step 912 is shut down automatically;

After liquid crystal display 814 continues to show one section default time, after 10 minutes, shutdown automatically.

Also there is the 3rd embodiment in the present invention, as shown in figure 10, is the particular circuit configurations figure of preferable the 3rd embodiment electronic thermometer of the present invention.Its course of work as shown in figure 11, and is specific as follows described.

Step 121 starts;

Electronic thermometer brings into operation, and when starting electronic thermometer switch 101, oscillator 102 produces basic system works frequency, drives the entire circuit system.

Step 122 initial value is set;

At first carry out initial setting work, default value is inserted in each controller in circuit.

Step 123 measures environment temperature and shows measurement;

Carry out environment temperature measuring, the measurement value is stored in original bulk measured value buffer and maximum temperature reservoir, and is converted to the temperature value demonstration.

Oscillator 102 drives clock generator 103, and clock generator 103 can produce various frequency preset and associated control signal output then.

Utilize and estimate that device 104 determines sample time according to default sampling frequency value sample time, via controller 105 sample time, when beginning to measure, export primary sampling control signal, controlling resistance frequency converter or analog-digital converter 106 will come from temperature sensor 107 obtained temperature signals and change digital signal into, and inlet measured value counter buffer 108 is calculated as digital measurement value.

Above-mentioned measurement value is stored to original bulk measured value buffer 109 and exports temperature prediction module 118 to, and via data comparator 110 with relatively at the initial value of 111 li of maximum temperature reservoirs, if, then being stored to the measurement value maximum temperature reservoir 111 greater than the initial value of 111 li of maximum temperature reservoirs, the measurement value replaces initial value.Owing to be to measure for the first time, its value is inevitable greater than initial value, so action must take place.

With the measurement value via sexadecimal value converter 112 convert to decimal data again transmission display driver 113 drive liquid crystal displays 114 temperature value shown.

The detecting of step 124 first sampling frequency also shows measurement;

Frequency with first sampling frequency is carried out measuring temp next time, and the measurement value is shown on the liquid crystal display 114 if greater than mxm. before, then this measurement value is stored in the maximum temperature reservoir and is converted to temperature value.

Present embodiment is with greater than more than 2 hertz, and preferably the frequency of first sampling frequency more than 10 hertz is carried out measuring temp, so that grasp the time point that body temperature begins to measure more accurately.Clock generator 103 produces the associated control signal output of next time taking a sample.

Utilize and estimate that device 104 is according to default first sampling frequency decision sample time sample time, via controller 105 sample time, the output sampling control signal, controlling resistance frequency converter or analog-digital converter 106 will come from temperature sensor 107 obtained temperature signals and change digital signal into, and inlet measured value counter buffer 108 is calculated as digital measurement value.

With above-mentioned measurement value via data comparator 110 with relatively at the former storage values of 111 li of maximum temperature reservoirs, if, then being stored to the measurement value maximum temperature reservoir 111 greater than the former storage values of 111 li of maximum temperature reservoirs, the measurement value replaces former storage values.And with the measurement value via sexadecimal value converter 112 convert to decimal data again transmission display driver 113 drive liquid crystal displays 114 temperature value shown.Output signal makes zero the temperature stabilization time counter 115 in the clock generator 103 simultaneously.

If the measurement value does not then have any subsequent action less than the former storage values of 111 li of maximum temperature reservoirs.

Does step 125 heat up greater than the default value that presets?

If the temperature that detects measurement value for the first time exceeds the default value that presets, as more than 0.2 degree centigrade, represent clinical thermometer to begin to measure body temperature, skip to step 127, otherwise represent still to stop at ambient temperature, also do not begin body temperature and measure.

In the step 124, the measurement value except that via the former storage values of 111 li of data comparator 110 and maximum temperature reservoirs relatively, also compare via the value of data comparator 110 with original bulk measured value buffer 109, if the measurement value surpasses the default value that presets greatly than the value of original bulk measured value buffer 109, for example be about more than 0.2 degree centigrade after the conversion, then produce a signal in order to trigger clock generator 103 transform sampling frequencies.Otherwise the temperature stabilization time counter 115 that output signal is given in the clock generator 103 adds one unit interval of meter.

Is step 126 greater than the default time that presets?

When the temperature that detects within a certain period of time, as 3 minutes, rising reached the default value that presets, as more than 0.2 degree centigrade, then shutdown automatically.

Surpass the default value that presets when measuring the value of end value than original bulk measured value buffer 109, for example be about 0.2 degree centigrade after the conversion, then the temperature stabilization time counter 115 that gives in the clock generator 103 of output signal adds one unit interval of meter.When the temperature stabilization time counter 115 in the sequential generator 103 reaches when being equal to a default time, as 3 minutes, then clock generator 103 produced a signal, automatically shutdown.If the temperature stabilization time counter 115 in the clock generator 103 is less than this default time, promptly with the identical first sampling frequency repeating step, 124 actions.

The detecting of step 127 second sampling frequency also shows measurement;

The first time, the measurement value exceeded the default value that presets when the temperature that detects, as more than 0.2 degree centigrade, represent clinical thermometer to begin to measure body temperature, for obtaining the temperature compensation synchronous with heartbeat, switch to another sampling frequency, this sampling frequency should be near palmic rate, as one minute 70 secondary.

Present embodiment is carried out measuring temp with the frequency of 1.2 hertz second sampling frequency, is all the purpose of position in the same way so that make sampling frequency and human body heartbeat reach each value synchronously.

If the measurement value surpasses the default value that presets greatly than the value of original bulk measured value buffer 109, for example be about more than 0.2 degree centigrade after the conversion, then produce a signal and produce the associated control signal output of next time taking a sample in order to trigger clock generator 103 transform sampling frequencies.

Utilize and estimate that device 104 is according to default second sampling frequency decision sample time sample time, via controller 105 sample time, the output sampling control signal, controlling resistance frequency converter or analog-digital converter 106 will come from temperature sensor 107 obtained temperature signals and change digital signal into, and inlet measured value counter buffer 108 is calculated as digital measurement value.

With above-mentioned measurement value export to temperature prediction module 118 and via data comparator 110 with relatively at the former storage values of 111 li of maximum temperature reservoirs, if, then being stored to the measurement value maximum temperature reservoir 111 greater than the former storage values of 111 li of maximum temperature reservoirs, the measurement value replaces former storage values.And with the measurement value via sexadecimal value converter 112 convert to decimal data again transmission display driver 113 drive liquid crystal displays 114 temperature value shown.Output signal makes zero the temperature stabilization time counter 115 in the clock generator 103 simultaneously.

If the measurement value is less than the former storage values of 111 li of maximum temperature reservoirs, then the temperature stabilization time counter 115 that gives in the clock generator 103 of output signal adds one unit interval of meter, but output signal is not given sexadecimal value converter 112.

The worthwhile input of specific several measurements that ring temperature that step 128 will detect and step 127 are obtained utilizes specific formula or algorithm computation to obtain predicted value, in order to predict the final actual end value that measures;

The worthwhile input of specific several measurements that initial temperature value that step 123 is obtained and step 127 are obtained, and use specific formula or algorithm computation, measure the net result value of back for a long time with prediction, in order to reduce the measurement time.

Temperature prediction module 118 built-in default formula or algorithms are with the in addition computing of the value of step 123 and step 127 input, with the estimated value that obtains.

Whether has step 129 calculated rational predicted value?

Utilize default logical OR pattern whether reasonable in order to judge climb situation or value of predicting the outcome of temperature.

Also have in the temperature prediction module 118 and can if judge that the back is rational, then export a signal and give clock generator 103 in order to the module of judging that predicted value is whether reasonable, clock generator 103 triggers sounding driver 116 with a specific time sequence again.Enter step step 130.

If unreasonable through judging the input value or the value of predicting the outcome, repeating step step 127 then, step 128.

Step 130, liquid crystal display shows, the hummer sounding

Measurement is finished, and a series of sound can take place hummer 117.114 of liquid crystal displays continue to show the highest measuring value.Sounding driver 116 drives hummer 117 and produces the default sound.

Step 131, shutdown automatically

After liquid crystal display 114 continues to show one section default time, after 10 minutes, shutdown automatically.

Also there is the 4th embodiment in the present invention, as shown in figure 12, is the particular circuit configurations figure of preferable the 3rd embodiment electronic thermometer of the present invention.Its course of work as shown in figure 13, and is specific as follows described.

Step 151 starts;

Electronic thermometer brings into operation, and when starting electronic thermometer switch 141, oscillator 142 produces basic system works frequency, drives the entire circuit system.

Step 152, initial value is set;

At first carry out initial setting work, default value is inserted in each controller in circuit

Step 153 measures environment temperature and shows measurement;

Carry out environment temperature measuring, the measurement value is stored in original bulk measured value buffer and maximum temperature reservoir, and is converted to temperature value and demonstration.

Oscillator 142 drives clock generator 143, and clock generator 143 can produce various frequency preset and associated control signal output then.

Utilize and estimate that device 144 determines sample time according to default sampling frequency value sample time, via controller 145 sample time, when beginning to measure, export primary sampling control signal, controlling resistance frequency converter or analog-digital converter 146 will come from temperature sensor 147 obtained temperature signals and change digital signal into, and inlet measured value counter buffer 148 is calculated as digital measurement value.

Above-mentioned measurement value is stored to original bulk measured value buffer 149 and exports temperature prediction module 1410 to, and via data comparator 1411 with relatively at the initial value of 1412 li of maximum temperature reservoirs, if, then being stored to the measurement value maximum temperature reservoir 1412 greater than the initial value of 1412 li of maximum temperature reservoirs, the measurement value replaces initial value.Owing to be to measure for the first time, its value is inevitable greater than initial value, so action must take place.

With the measurement value via sexadecimal value converter 1413 convert to decimal data again transmission display driver 1414 drive liquid crystal displays 1415 temperature value shown.

Step 154, the detecting of first sampling frequency also shows measurement;

Frequency with first sampling frequency is carried out measuring temp next time, and the measurement value is shown on the liquid crystal display 1415 if greater than mxm. before, then this measurement value is stored in the maximum temperature reservoir and is converted to temperature value.

Present embodiment is with greater than more than 2 hertz, and preferably the frequency of first sampling frequency more than 10 hertz is carried out measuring temp, so that grasp the time point that body temperature begins to measure more accurately.Clock generator 143 produces the associated control signal output of next time taking a sample.

Utilize and estimate that device 144 is according to default first sampling frequency decision sample time sample time, via controller 145 sample time, the output sampling control signal, controlling resistance frequency converter or analog-digital converter 146 will come from temperature sensor 147 obtained temperature signals and change digital signal into, and inlet measured value counter buffer 148 is calculated as digital measurement value.

With above-mentioned measurement value via data comparator 1411 with relatively at the former storage values of 1412 li of maximum temperature reservoirs, if, then being stored to the measurement value maximum temperature reservoir 1412 greater than the former storage values of 1412 li of maximum temperature reservoirs, the measurement value replaces former storage values.And with the measurement value via sexadecimal value converter 1413 convert to decimal data again transmission display driver 1414 drive liquid crystal displays 1415 temperature value shown.Simultaneously the measurement value being stored to buffer 1 and output signal makes zero the temperature stabilization time counter 1417 in the clock generator 143.The value of buffer 1 is stored to buffer 2 1418 again.

If the measurement value does not then have any subsequent action less than the former storage values of 1412 li of maximum temperature reservoirs.

Does step 155 heat up greater than the default value that presets?

If the temperature that detects measurement value for the first time exceeds the default value that presets, as more than 0.2 degree centigrade, represent clinical thermometer to begin to measure body temperature, skip to step 157, otherwise represent that still stop does not also begin body temperature at ambient temperature and measures.

In the step 154, the measurement value except that via the former storage values of 1412 li of data comparator 1411 and maximum temperature reservoirs relatively, also compare via the value of data comparator 1411 with original bulk measured value buffer 149, if the measurement value surpasses the default value that presets greatly than the value of original bulk measured value buffer 149, for example be about more than 0.2 degree centigrade after the conversion, then produce a signal in order to trigger clock generator 143 transform sampling frequencies.Otherwise the temperature stabilization time counter 1417 that output signal is given in the clock generator 143 adds one unit interval of meter.

Is step 156 greater than the default time that presets?

When the temperature that detects within a certain period of time, as 3 minutes, rising reached the default value that presets, as more than 0.2 degree centigrade, then shutdown automatically.

Surpass the default value that presets when measuring the value of end value than original bulk measured value buffer 149, for example be about 0.2 degree centigrade after the conversion, then the temperature stabilization time counter 1417 that gives in the clock generator 143 of output signal adds one unit interval of meter.When the temperature stabilization time counter 1417 in the sequential generator 143 reaches when being equal to a default time, as 3 minutes, then clock generator 143 produced a signal, automatically shutdown.If the temperature stabilization time counter 1417 in the clock generator 143 is less than this default time, promptly with 154 actions of same frequency (first sampling frequency) repeating step.

Step 157, the detecting of first sampling frequency also shows measurement;

The first time, the measurement value exceeded the default value that presets when the temperature that detects, and as more than 0.2 degree centigrade, represented clinical thermometer to begin to measure body temperature, carried out measuring temp.

If the measurement value surpasses the default value that presets greatly than the value of original bulk measured value buffer 149, for example be about more than 0.2 degree centigrade after the conversion, then produce a signal and produce the associated control signal output of next time taking a sample with former sampling frequency in order to trigger clock generator 143.

Utilize and estimate that device 144 is according to default first sampling frequency decision sample time sample time, via controller 145 sample time, the output sampling control signal, controlling resistance frequency converter or analog-digital converter 146 will come from temperature sensor 147 obtained temperature signals and change digital signal into, and inlet measured value counter buffer 148 is calculated as digital measurement value.

With above-mentioned measurement value via data comparator 1411 with relatively at the former storage values of 1412 li of maximum temperature reservoirs, if, then being stored to the measurement value maximum temperature reservoir 1412 greater than the former storage values of 1412 li of maximum temperature reservoirs, the measurement value replaces former storage values.And with the measurement value via sexadecimal value converter 1413 convert to decimal data again transmission display driver 1414 drive liquid crystal displays 1415 temperature value shown.If the measurement value is less than the former storage values of 1412 li of maximum temperature reservoirs, then the temperature stabilization time counter 1417 that gives in the clock generator 143 of output signal adds one unit interval of meter, but output signal is not given sexadecimal value converter 1413.

Simultaneously the measurement value being stored to buffer 1 and output signal makes zero the temperature stabilization time counter 1417 in the clock generator 143.Utilize slope to calculate the difference that buffer 1419 calculates buffer 1 and buffer 2 1418, difference deposits slope buffer 1 in.Afterwards, the value of buffer 1 is stored to buffer 2 1418 again.

Step 158 estimates out time interval between two points of inflexion, with as after spacing sweep time

The variable quantity of time per unit temperature relatively simultaneously utilizes the time per unit temperature slope that climbs to transfer to by successively decreasing rising progressively and climb to the point of inflexion of time with estimated temperature.Because blood brings thermal source when defeated during each heartbeat, afterwards because external environment and clinical thermometer are taken away thermal source, so the curve that climbs of temperature can become wavy progressively rising.The time spacing of two points of inflexion is heart time one time.

Wherein, dual mode is arranged, one is: utilize slope ratio than the difference of buffer 1421 comparison slope buffers 1 with slope buffer 2 1422, the value of slope buffer 1 is stored to slope buffer 2 1422.

Repeating step 157, step 158 if finding that slope transfers to by successively decreasing increases progressively, is then counted first point of inflexion, when starting the point of inflexion apart from estimation device 1423.

Repeating step 157, step 158, finding once more that slope transfers to by successively decreasing increases progressively that (slope can increase progressively earlier after the point of inflexion, transfer to again and successively decreasing, increase progressively again afterwards), then count second point of inflexion, producing a signal this moment is sampling frequency in order to trigger clock generator 143 conversion with this two points of inflexion mistiming (being called second sampling frequency) reciprocal.Produce the associated control signal output of next time taking a sample.

Another kind of mode is: utilize slope ratio than the difference of buffer 1421 comparison slope buffers 1 with slope buffer 2 1422, the value of slope buffer 1 is stored to slope buffer 2 1422.

Repeating step 157, step 158 step if finding that slope transfers to by successively decreasing increases progressively, is then counted first point of inflexion, when starting the point of inflexion apart from estimation device 1423.

Repeating step 157, step 158 step is found once more that slope transfers to by successively decreasing and is increased progressively (slope can increase progressively earlier after the point of inflexion, transfers to and successively decreasing, and increases progressively afterwards) again, then counts second point of inflexion.Repeat to get a default n point of inflexion.

After finishing, producing a signal is second sampling frequency in order to the inverse that triggering clock generator 143 is transformed to this n point of inflexion difference averaging time.Produce the associated control signal output of next time taking a sample.

Step 159, the detecting of second sampling frequency also shows measurement;

With aforementioned two point of inflexion mistimings of calculating gained as after spacing sweep time so that make sampling frequency and human body heartbeat reach the purpose that each value is all in the same way synchronously.In theory, this mistiming is the mistiming of each heartbeat.

Utilize and estimate that device 144 determines sample time according to second sampling frequency sample time, via controller 145 sample time, the output sampling control signal, controlling resistance frequency converter or analog-digital converter 146 will come from temperature sensor 147 obtained temperature signals and change digital signal into, and inlet measured value counter buffer 148 is calculated as digital measurement value.

With above-mentioned measurement value export to temperature prediction module 1410 and via data comparator 1411 with relatively at the former storage values of 1412 li of maximum temperature reservoirs, if, then being stored to the measurement value maximum temperature reservoir 1412 greater than the former storage values of 1412 li of maximum temperature reservoirs, the measurement value replaces former storage values.And with the measurement value via sexadecimal value converter 1413 convert to decimal data again transmission display driver 1414 drive liquid crystal displays 1415 temperature value shown.Output signal makes zero the temperature stabilization time counter 1417 in the clock generator 143 simultaneously.

If the measurement value is less than the former storage values of 1412 li of maximum temperature reservoirs, then the temperature stabilization time counter 1417 that gives in the clock generator 143 of output signal adds one unit interval of meter, but output signal is not given sexadecimal value converter 1413.

The worthwhile input of specific several measurements that ring temperature that step 1610 will detect and step 159 are obtained utilizes specific formula or algorithm computation to obtain predicted value, in order to predict the final actual end value that measures;

The worthwhile input of specific several measurements that initial temperature value that step 153 is obtained and step 159 are obtained, and use specific formula or algorithm computation, measure the net result value of back for a long time with prediction, in order to reduce the measurement time.

Temperature prediction module 1410 built-in default formula or algorithms are with the in addition computing of the value of step 153 and step 159 input, with the estimated value that obtains.

Whether has step 1611 calculated rational predicted value?

Utilize default logical OR pattern whether reasonable in order to judge climb situation or value of predicting the outcome of temperature.

Also have in the temperature prediction module 1410 and can if judge that the back is rational, then export a signal and give clock generator 143 in order to the module of judging that predicted value is whether reasonable, clock generator 143 triggers sounding driver 1424 with a specific time sequence again.Enter step 1612.

If unreasonable through judging the input value or the value of predicting the outcome, then repeating step 159, step 1610.

Step 1612, liquid crystal display shows, the hummer sounding;

Measurement is finished, and a series of sound can take place hummer 1425.

1415 of liquid crystal displays continue to show the highest measuring value.Sounding driver 1424 drives hummer 1425 and produces the default sound.

Step 1613, shutdown automatically, after liquid crystal display 1415 continues to show one section default time, after 10 minutes, shutdown automatically.

Though the present invention is described with reference to current better embodiment; but those skilled in the art will be appreciated that; above-mentioned better embodiment only is used for illustrating the present invention; be not to be used for limiting protection scope of the present invention; any within the spirit and principles in the present invention scope; any modification of being done, equivalence replacement, improvement etc. all should be included within the scope of the present invention.

Claims (10)

1. electronic thermometer, comprise the temperature computing device that is used to obtain the temperature sense assembly of temperature signal and carries out processes temperature signal, it is characterized in that: the temperature signal that described temperature computing device is obtained the temperature sense assembly in conjunction with second sampling frequency by first sampling frequency is converted to temperature value, accurately measure body temperature, wherein first sampling frequency is higher than second sampling frequency.

2. a kind of electronic thermometer as claimed in claim 1 is characterized in that: described first sampling frequency is 〉=2.0 hertz high frequency, after start to the preceding employing of starting working of second sampling frequency; Second sample period was

Second/time low frequency.

3. a kind of electronic thermometer as claimed in claim 1 is characterized in that: described first sampling frequency is 〉=2.0 hertz high frequency, after start to the preceding employing of starting working of second sampling frequency; The second sampling frequency value is for seeing through the approximate pulse frequency after estimating.

4. a kind of electronic thermometer as claimed in claim 3, it is characterized in that: the described second sampling frequency value is for seeing through the approximate pulse frequency after estimating, to be accounting temperature climb mistiming of first point of inflexion to the second point of inflexion of curve to the time its evaluation method, is used as the second sampling frequency value with its inverse.

5. a kind of electronic thermometer as claimed in claim 3, it is characterized in that: the described second sampling frequency value is for seeing through the approximate pulse frequency after estimating, to be accounting temperature climb first mistiming to the n point of inflexion of curve to the time its evaluation method, behind n-1, wherein, n is the positive integer greater than 1, is used as the second sampling frequency value with its inverse.

6. as claim 3,4 or 5 each described a kind of electronic thermometers, it is characterized in that: when described electronic thermometer has just been started shooting, carry out temperature detecting with first sampling frequency, after estimating the second sampling frequency value, change with second sampling frequency and carry out measuring temp next time.

7. as claim 1,2 each described a kind of electronic thermometers, it is characterized in that: when described electronic thermometer has just been started shooting, carry out temperature detecting with first sampling frequency, from detecting for the second time temperature, and when the temperature that detects reaches particular value greater than the temperature that last time detected, as more than 0.2 degree centigrade, change with second sampling frequency and carry out measuring temp next time.

8. a kind of electronic thermometer as claimed in claim 6, it is characterized in that: described with the obtained specific individual value of first sampling frequency obtained and not switching after switching to specific obtained after second sampling frequency value or switching to second sampling frequency, via obtaining a predicted value after specific formula or the algorithm computation, to reduce the measurement time as measurement.

9. a kind of electronic thermometer as claimed in claim 7, it is characterized in that: described with the obtained specific individual value of first sampling frequency obtained and not switching after switching to specific obtained after second sampling frequency value or switching to second sampling frequency, via obtaining a predicted value after specific formula or the algorithm computation, to reduce the measurement time as measurement.

10. a kind of electronic thermometer as claimed in claim 1 is characterized in that: described temperature sense assembly comprises temperature sensor, as thermistor.

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