CN105852821A - Body temperature measurement device and measurement method thereof - Google Patents
Body temperature measurement device and measurement method thereof Download PDFInfo
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- CN105852821A CN105852821A CN201610168452.XA CN201610168452A CN105852821A CN 105852821 A CN105852821 A CN 105852821A CN 201610168452 A CN201610168452 A CN 201610168452A CN 105852821 A CN105852821 A CN 105852821A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/01—Measuring temperature of body parts ; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7225—Details of analog processing, e.g. isolation amplifier, gain or sensitivity adjustment, filtering, baseline or drift compensation
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
- A61B2560/02—Operational features
- A61B2560/0242—Operational features adapted to measure environmental factors, e.g. temperature, pollution
- A61B2560/0247—Operational features adapted to measure environmental factors, e.g. temperature, pollution for compensation or correction of the measured physiological value
- A61B2560/0252—Operational features adapted to measure environmental factors, e.g. temperature, pollution for compensation or correction of the measured physiological value using ambient temperature
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Abstract
The invention discloses a body temperature measurement device, which comprises an MCU control circuit as well as a first channel circuit, a second channel circuit, a third channel circuit and a fourth channel circuit which are electrically connected to the MCU control circuit. With the design of four channels, influence of external environmental factors is reduced to a great extent, the judgment of hardware failures becomes more accurate and effective, and the stability of a system is enhanced. The invention also discloses a body temperature measurement method, which comprises steps of acquiring dual-channel data, processing a mean value, calculating temperature, compensating the temperature, outputting a temperature value and the like. Errors, which are easily caused in a conventional measurement method, are detected and compensated correspondingly by the body temperature measurement method, so that the errors are eliminated. Therefore, by virtue of dual improvement on hardware and software, measurement accuracy is improved and manual calibration is avoided, so that the measurement device and method are convenient to use.
Description
Technical field
The present invention relates to technical field of temperature measurement, particularly relate to a kind of body temperature measuring device and measuring method thereof.
Background technology
Body temperature is a basic vital sign of human body, and it can reflect the physiological status of body, the normal life of human body
The movable temperature being all necessarily dependent upon relative constancy.The measurement of body temperature can help doctor to clarify a diagnosis the state of an illness and analyze curative effect,
The accuracy of measurement of bldy temperature directly affects diagnosis and the treatment of disease.
But the most a lot of conventional bulk temperature measurement devices use the separate chip such as operational amplifier and capacitance resistance component to constitute
Signal is amplified processing by analog circuit, and the shortcoming of discrete device has:
(1) analog circuit that discrete device is built is easily subject to surrounding such as electromagnetic interference, Hz noise, variations in temperature
Impact, thus affect gather signal accuracy, calculating below is brought the biggest error；
(2) analog circuit that a lot of discrete devices are constituted can bring the biggest power consumption, and the high heat that high power consumption produces can be right
The stability of system produces a very large impact.
(3) conventional bulk temperature measurement device is due to the deficiency of design on hardware and software, after measuring a period of time, whole measurement
System can occur error, wherein causes components and parts that the temperature computation error that the external factor such as temperature drift are brought occurs for ambient temperature
It is inevitable, needs user manually to calibrate elimination error, use and bother very much.
Therefore, the present inventor needs a kind of new technique of design badly to improve its problem.
Summary of the invention
It is desirable to provide a kind of body temperature measuring device and measuring method thereof, it is changed by dual on hardware and software
Enter, improve certainty of measurement, it is not necessary to manual calibration, easy-to-use.
For achieving the above object, the present invention is by the following technical solutions:
A kind of body temperature measuring device, including: MCU control circuit and the first passage circuit being electrically connected respectively, second
Channel circuit, third channel circuit, fourth lane circuit, wherein said first passage circuit and described second channel circuit and body
Temperature sensor connects, and sends to described MCU control circuit for body temperature trans collects temperature signals；Described third channel
Circuit and described fourth lane circuit send to described MCU control circuit for the fault message that will detect.
Preferably, described MCU control circuit is ADuCM361 microcontroller, is built-in with 24 ADC analog-digital converters.
Preferably, also include a power circuit, described power circuit respectively with described MCU control circuit, described first lead to
Road circuit, described second channel circuit, described third channel circuit and the electrical connection of described fourth lane circuit.
Preferably, described first passage circuit and/or described second channel circuit include the first resistance, the second resistance,
Three resistance, the first inductance, switching diode, wherein said first inductance one end is connected with described body temperature trans, and the other end divides
It is not connected with described first resistance, the second resistance, the 3rd resistance, switching diode, the other end of described switching diode and institute
Stating power circuit to connect, the other end of described second resistance accesses reference voltage.
Preferably, described third channel circuit and/or described fourth lane circuit include the 4th resistance, the 5th resistance,
Six resistance and the first electric capacity, one end of wherein said 4th resistance accesses reference voltage, the other end respectively with described 5th resistance
Connecting with described 6th resistance, the other end of described 6th resistance is connected with described first electric capacity and described MCU control circuit.
Preferably, the output voltage of described power circuit is 3.3V, and described reference voltage is 1.2V.
A kind of measuring method based on body temperature measuring device described above, it comprises the steps:
S1: use double channel data acquisition mechanism, carry out data acquisition by MCU interruption pattern, obtain multiple ADC number
According to；Wherein said double channel data acquisition mechanism is for utilizing first passage circuit and second channel circuit by body temperature trans collection
The multiple temperature signals arrived send to MCU control circuit, and multiple temperature signals are converted to multiple ADC by described MCU control circuit
Data, are designated as ADCi, wherein i is the integer more than or equal to 0；
S2: the multiple adc datas obtained are carried out average value processing, obtains ADC average, be designated as ADCAll；
S3: calculate body temperature theoretical value according to temperature computation formula, be designated as TReason；
S4: calculate ADC theoretical value according to temperature-compensating formula, be designated as ADCReason, by contrast ADCAllAnd ADCReasonTwo values, obtain
Obtain ADCBy mistake, pass through ADCBy mistakeCalculate temperature error TBy mistake, according to TBy mistakeAnd TReasonObtain final body temperature value T；
S5: output final body temperature value T, and repeat all above step.
Preferably, described step S1 specifically includes:
S11: opened the ADC interrupt mode of first passage circuit by MCU control circuit；
S12: m the temperature signals utilizing first passage circuit to be collected by body temperature trans sends to MCU control circuit,
M temperature signals is converted to m adc data by described MCU control circuit；
S13: opened the ADC interrupt mode of second channel circuit by MCU control circuit；
S14: n the temperature signals utilizing second channel circuit to be collected by body temperature trans sends to MCU control circuit,
N temperature signals is converted to n adc data by described MCU control circuit；
Wherein m and n is the integer more than or equal to 1.
Preferably, m=8, n=8.
Preferably, the temperature computation formula in described step S3 is:
TReason=A*ADC6+B*ADC5+C*ADC4+D*ADC3+E*ADC2+F*ADC+G
By ADCAllBring ADC into, obtain body temperature theoretical value TReason；
Temperature computation formula in described step S4 is:
Y=A*x6+B*x5+C*x4+D*x3+E*x2+F*x+G
By TReasonBring y into, solve equation and ask for x, it is possible to obtain ADC theoretical value ADCReason。
Beneficial effects of the present invention: the design of four paths largely reduces the shadow brought because of external environmental factor
Ring, more accurate and effective can judge the hardware fault of body temperature plate, add the stability of system.And owing to ambient temperature causes
The temperature computation error that components and parts occur the external factor such as temperature drift to bring is inevitable, therefore algorithm is also carried out by the present invention
Improve, these errors have been done corresponding detection and compensation, has eliminated these errors.I.e. changed by dual on hardware and software
Enter, improve certainty of measurement, it is not necessary to manual calibration, easy-to-use.
Accompanying drawing explanation
In order to make present disclosure be more likely to be clearly understood, below in conjunction with the accompanying drawings, the present invention is made the most in detail
Thin explanation, wherein:
Fig. 1 is the schematic diagram of body temperature measuring device of the present invention；
Fig. 2 is the electrical schematic diagram of MCU control circuit；
Fig. 3 is the electrical schematic diagram of power circuit；
Fig. 4 is first passage circuit and the electrical schematic diagram of second channel circuit；
Fig. 5 a is the electrical schematic diagram of third channel circuit；
Fig. 5 b is the electrical schematic diagram of fourth lane circuit；
Fig. 6 is the flow chart of body temperature measurement method of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
Embodiment 1
As it is shown in figure 1, for meeting a kind of body temperature measuring device described in the present embodiment, mainly use on body temperature plate,
Comprising: MCU control circuit and the first passage circuit being electrically connected respectively, second channel circuit, third channel circuit,
Four-way circuit, wherein said first passage circuit and described second channel circuit are connected with body temperature trans, for by body temperature
Sensor acquisition sends to described MCU control circuit to temperature signals；Described third channel circuit and described fourth lane circuit
Fault message for detecting sends to described MCU control circuit.
Preferably, as in figure 2 it is shown, described MCU control circuit is ADuCM361 microcontroller, it is built-in with 24 ADC simulations
Digital converter.The accurate reference voltage of low noise Low Drift Temperature, programmable-gain operational amplifier, whole signal is put
The big analog circuit processed all is integrated in MCU, largely reduces the impact brought because of external environmental factor.
Preferably, as it is shown on figure 3, also include a power circuit, described power circuit respectively with described MCU control circuit,
Described first passage circuit, described second channel circuit, described third channel circuit and the electrical connection of described fourth lane circuit.
Preferably, described first passage circuit and/or described second channel circuit include the first resistance, the second resistance,
Three resistance, the first inductance, switching diode, wherein said first inductance one end is connected with described body temperature trans, and the other end divides
It is not connected with described first resistance, the second resistance, the 3rd resistance, switching diode, the other end of described switching diode and institute
Stating power circuit to connect, the other end of described second resistance accesses reference voltage.In a preferred embodiment, as shown in Figure 4, institute
Stating first passage circuit identical with the circuit theory of described second channel circuit, described first passage circuit includes the first resistance
R132, the second resistance R128, the 3rd resistance R129, the first inductance FB14 (preferably BLM18BD601SN1), switching diode D8
(preferably BAV99/SOT), one end of the first inductance FB14 is connected with the crus secunda of body temperature trans.Described second channel circuit
Including the first resistance R134, the two or two resistance R135, the 3rd resistance R136, the first inductance FB15 (preferably
BLM18BD601SN1), two diode D9 (preferably BAV99/SOT), one end of the first inductance FB15 and body temperature trans are switched
The 4th foot connect.
Preferably, described third channel circuit and/or described fourth lane circuit include the 4th resistance, the 5th resistance,
Six resistance and the first electric capacity, one end of wherein said 4th resistance accesses reference voltage, the other end respectively with described 5th resistance
Connecting with described 6th resistance, the other end of described 6th resistance is connected with described first electric capacity and described MCU control circuit.?
In one preferred embodiment, as shown in Figure 5 a, described third channel circuit is identical with described fourth lane circuit theory, and the described 3rd
Channel circuit includes the 4th resistance R140, the 5th resistance R144, the 6th resistance R142 and the first electric capacity C110.As shown in Figure 5 b,
Described fourth lane circuit is identical with described fourth lane circuit theory, described third channel circuit include the 4th resistance R141,
5th resistance R145, the 6th resistance R143 and the first electric capacity C111.Examined by third channel circuit and described fourth lane circuit
Survey the hardware fault of body temperature plate, it is thus possible to more accurate and effective judges the hardware fault of body temperature plate, add the stability of system.
The parameters such as the resistance of all resistance in the present embodiment may refer to accompanying drawing, and this is not repeated by the present embodiment.
Preferably, the output voltage of described power circuit is 3.3V, and described reference voltage is 1.2V.
The operation principle of the present embodiment is: temperature signals is transferred to MCU by first passage circuit and second channel circuit,
Third channel circuit and the hardware fault of fourth lane electric circuit inspection body temperature plate, the MCU in MCU control circuit has been internally integrated mould
Intending front-end circuit, be filtered signal and processing and amplifying, power circuit is to system power supply.The design of four paths is largely
Reduce the impact brought because of external environmental factor, more accurate and effective can judge the hardware fault of body temperature plate, add system
Stability.
Embodiment 2
As shown in Figure 6, a kind of measuring method based on the body temperature measuring device described in embodiment 1, it comprises the steps:
S1: using 24 ADC analog-digital converters of MCU, (those skilled in the art should to set data sampling rate
Know, therefore here is omitted), use double channel data acquisition mechanism, carry out data acquisition by MCU interruption pattern, obtain
Multiple adc datas；Wherein said double channel data acquisition mechanism is for utilizing first passage circuit and second channel circuit by body temperature
Multiple temperature signals that sensor acquisition arrives send to MCU control circuit, and multiple temperature signals are changed by described MCU control circuit
For multiple adc datas, it is designated as ADCi, wherein i is the integer more than or equal to 0；
S2: the multiple adc datas obtained are carried out average value processing, obtains ADC average, be designated as ADCAll；
S3: calculate body temperature theoretical value according to temperature computation formula, be designated as TReason；
S4: calculate ADC theoretical value according to temperature-compensating formula, be designated as ADCReason, by contrast ADCAllAnd ADCReasonTwo values, obtain
Obtain ADCBy mistake, pass through ADCBy mistakeCalculate temperature error TBy mistake, according to TBy mistakeAnd TReasonObtain final body temperature value T；
S5: output final body temperature value T, and repeat all above step.
Preferably, described step S1 specifically includes:
S11: opened the ADC interrupt mode of first passage circuit by MCU control circuit；
S12: m the temperature signals utilizing first passage circuit to be collected by body temperature trans sends to MCU control circuit,
M temperature signals is converted to m adc data by described MCU control circuit；
S13: opened the ADC interrupt mode of second channel circuit by MCU control circuit,
S14: n the temperature signals utilizing second channel circuit to be collected by body temperature trans sends to MCU control circuit,
N temperature signals is converted to n adc data by described MCU control circuit；
Wherein m and n is the integer more than or equal to 1.Step is entered when second channel circuit has gathered n adc data
Rapid S2 calculates, and has calculated rear repeat the above steps.Certainly the present embodiment can also include initialization procedure, owing to it is
Ordinary skill in the art means, therefore here is omitted.
Below with, as a example by m=8, n=8, whole calculation process is described.
First, opened the ADC interrupt mode of first passage circuit by MCU control circuit, utilize first passage circuit to incite somebody to action
8 temperature signals that body temperature trans collects send to MCU control circuit, and 8 temperature signals are turned by described MCU control circuit
It is changed to 8 adc datas；
Then opened the ADC interrupt mode of second channel circuit by MCU control circuit, utilize second channel circuit by body
8 temperature signals that temperature sensor collects send to MCU control circuit, and 8 temperature signals are changed by described MCU control circuit
It is 8 adc datas.
Then average value processing is carried out: according to formula
After collecting 8 point data, 8 point data are done average value processing.
Preferably, the temperature computation formula in described step S3 is:
TReason=A*ADC6+B*ADC5+C*ADC4+D*ADC3+E*ADC2+F*ADC+G
By ADCAllBring ADC into, obtain body temperature theoretical value TReason；
Wherein A, these six coefficients of B, C, D, E, F, G calculate by the following method:
(I) in the measurement scope (0 DEG C～50 DEG C) of body temperature plate, every 0.5 DEG C, body temperature value is designated as Ti(0≤i≤50)
Gather the AD value of a body temperature, be designated as ADCi(0≤i≤50)；
(II) for TiValue, obtains a linear line, uses the curve matching of mathematical software instrument, by ADCiCurve
As far as possible
Fit to TiStraight line, thus can read A, these six coefficients of B, C, D, E, F, G by mathematical software.
(III) for temperature T obtained and body temperature value Ti, pass through formula
Ask for matching root-mean-square error, whether meet our error requirement for judgment curves matching design.
Temperature computation formula in described step S4 is:
Y=A*x6+B*x5+C*x4+D*x3+E*x2+F*x+G
By TReasonBring y into, solve equation and ask for x, it is possible to obtain ADC theoretical value ADCReason。
The temperature computation error causing components and parts to occur the external factor such as temperature drift to bring for ambient temperature is inevitable
, and hardware can only process a part therein, at this moment will eliminate these errors, the present embodiment pin by software compensation
These errors having been done corresponding detection and compensation, has eliminated these errors, user need not frequently carry out manual calibration, very
Big degree facilitates user.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.
Multiple amendment to these embodiments will be apparent from for those skilled in the art, as defined herein
General Principle can realize without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein and features of novelty phase one
The widest scope caused.
Claims (10)
1. a body temperature measuring device, it is characterised in that including: MCU control circuit and the first passage being electrically connected respectively
Circuit, second channel circuit, third channel circuit, fourth lane circuit, wherein said first passage circuit and described second leads to
Road circuit is connected with body temperature trans, sends to described MCU control circuit for body temperature trans collects temperature signals；Institute
State third channel circuit and described fourth lane circuit to send to described MCU control circuit for the fault message that will detect.
2. body temperature measuring device as claimed in claim 1, it is characterised in that: described MCU control circuit is ADuCM361 micro-control
Device processed, is built-in with 24 ADC analog-digital converters.
3. body temperature measuring device as claimed in claim 1 or 2, it is characterised in that: also include a power circuit, described power supply electricity
Road respectively with described MCU control circuit, described first passage circuit, described second channel circuit, described third channel circuit and
Described fourth lane circuit electrically connects.
4. body temperature measuring device as claimed in claim 3, it is characterised in that: described first passage circuit and/or described second
Channel circuit includes the first resistance, the second resistance, the 3rd resistance, the first inductance, switching diode, wherein said first inductance one
End be connected with described body temperature trans, the other end respectively with described first resistance, the second resistance, the 3rd resistance, switching diode
Connecting, the other end of described switching diode is connected with described power circuit, and the other end of described second resistance accesses benchmark electricity
Pressure.
5. the body temperature measuring device as described in claim 1-4 is arbitrary, it is characterised in that: described third channel circuit and/or institute
State fourth lane circuit and include the 4th resistance, the 5th resistance, the 6th resistance and the first electric capacity, one end of wherein said 4th resistance
Accessing reference voltage, the other end is connected with described 5th resistance and described 6th resistance respectively, the other end of described 6th resistance
It is connected with described first electric capacity and described MCU control circuit.
6. body temperature measuring device as claimed in claim 5, it is characterised in that: the output voltage of described power circuit is 3.3V,
Described reference voltage is 1.2V.
7. a measuring method based on the arbitrary described body temperature measuring device of claim 1-6, it is characterised in that include as follows
Step:
S1: use double channel data acquisition mechanism, carry out data acquisition by MCU interruption pattern, obtain multiple adc data；Its
Described in double channel data acquisition mechanism be to utilize first passage circuit and second channel circuit to be collected by body temperature trans
Multiple temperature signals send to MCU control circuit, and multiple temperature signals are converted to multiple adc data by described MCU control circuit,
It is designated as ADCi, wherein i is the integer more than or equal to 0；
S2: the multiple adc datas obtained are carried out average value processing, obtains ADC average, be designated as ADCAll；
S3: calculate body temperature theoretical value according to temperature computation formula, be designated as TReason；
S4: calculate ADC theoretical value according to temperature-compensating formula, be designated as ADCReason, by contrast ADCAllAnd ADCReasonTwo values, it is thus achieved that
ADCBy mistake, pass through ADCBy mistakeCalculate temperature error TBy mistake, according to TBy mistakeAnd TReasonObtain final body temperature value T；
S5: output final body temperature value T, and repeat all above step.
8. body temperature measurement method as claimed in claim 7, it is characterised in that described step S1 specifically includes:
S11: opened the ADC interrupt mode of first passage circuit by MCU control circuit；
S12: m the temperature signals utilizing first passage circuit to be collected by body temperature trans sends to MCU control circuit, described
M temperature signals is converted to m adc data by MCU control circuit；
S13: opened the ADC interrupt mode of second channel circuit by MCU control circuit；
S14: n the temperature signals utilizing second channel circuit to be collected by body temperature trans sends to MCU control circuit, described
N temperature signals is converted to n adc data by MCU control circuit；
Wherein m and n is the integer more than or equal to 1.
9. body temperature measurement method as claimed in claim 8, it is characterised in that: m=8, n=8.
10. body temperature measurement method as claimed in claim 9, it is characterised in that the temperature computation formula in described step S3 is:
TReason=A*ADC6+B*ADC5+C*ADC4+D*ADC3+E*ADC2+F*ADC+G
By ADCAllBring ADC into, obtain body temperature theoretical value TReason；
Temperature computation formula in described step S4 is:
Y=A*x6+B*x5+C*x4+D*x3+E*x2+F*x+G
By TReasonBring y into, solve equation and ask for x, it is possible to obtain ADC theoretical value ADCReason。
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| CN201610168452.XA CN105852821A (en) | 2016-03-23 | 2016-03-23 | Body temperature measurement device and measurement method thereof |
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| CN201610168452.XA CN105852821A (en) | 2016-03-23 | 2016-03-23 | Body temperature measurement device and measurement method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107397537A (en) * | 2017-07-25 | 2017-11-28 | 深圳市谷德科技有限公司 | A kind of mobile terminal and body temperature measurement method |
| CN109696248A (en) * | 2018-11-28 | 2019-04-30 | 武汉高德智感科技有限公司 | A kind of automatic compensating method of the human body inspection and quarantine system temperature based on environment temperature |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107397537A (en) * | 2017-07-25 | 2017-11-28 | 深圳市谷德科技有限公司 | A kind of mobile terminal and body temperature measurement method |
| CN109696248A (en) * | 2018-11-28 | 2019-04-30 | 武汉高德智感科技有限公司 | A kind of automatic compensating method of the human body inspection and quarantine system temperature based on environment temperature |
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