CN105137052B - A kind of calibration circuit of blood glucose meter product - Google Patents
A kind of calibration circuit of blood glucose meter product Download PDFInfo
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- CN105137052B CN105137052B CN201510480984.2A CN201510480984A CN105137052B CN 105137052 B CN105137052 B CN 105137052B CN 201510480984 A CN201510480984 A CN 201510480984A CN 105137052 B CN105137052 B CN 105137052B
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- measurement result
- blood glucose
- voltage
- operational amplifier
- glucose meter
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Abstract
The invention discloses a kind of calibration circuit of blood glucose meter product, including operational amplifier, feedback resistance, the first calibrating resistance, the second calibrating resistance.By the way that the reverse input end of operational amplifier is unloaded, the first measurement result is obtained；The reverse input end of operational amplifier is connected with the first calibrating resistance, obtains the second measurement result；By the reverse input end of operational amplifier and the second calibrating resistance, the 3rd measurement result is obtained.The actual value of reference voltage is obtained according to the first measurement result, the second measurement result and the 3rd measurement result.Because the precision of the first calibrating resistance and the second calibrating resistance is higher than one grade of feedback resistance in this calibration circuit, and it can be offset by repeatedly measuring because adjustable resistance is the error during regulation the problem of, therefore improve the precision of the reference voltage of measurement blood glucose meter product.
Description
Technical field
The present invention relates to field of circuit technology, more particularly to a kind of calibration circuit of blood glucose meter product.
Background technology
With the development of science and technology, blood glucose meter product is increasingly widely used, for example, hospital blood glucose meter is produced
Product, domestic glucometer product.The precision of the input voltage of blood glucose meter product, i.e. reference voltage has important for measurement result
Influence.If reference voltage actual value has big difference with theoretical value, measurement result also has deviation.Existing blood glucose meter product
The calibration of reference voltage mainly completed by the combination such as adjustable resistance, operational amplifier.Due to adjustable resistance precision itself
Influence and regulation process it is complex, therefore made troubles to the calibration of the reference voltage of blood glucose meter product, and precision compared with
It is low.
As can be seen here, how to improve the precision of the reference voltage of measurement blood glucose meter product is that those skilled in the art urgently solve
Certainly the problem of.
The content of the invention
It is an object of the invention to provide a kind of calibration circuit of blood glucose meter product, for improving the base of measurement blood glucose meter product
The precision of quasi- voltage.
In order to solve the above technical problems, the present invention provides a kind of calibration circuit of blood glucose meter product, including：
Operational amplifier, the positive input of the operational amplifier and the output end of calibration voltage connect；
The feedback resistance being connected with the reverse input end of the operational amplifier and the output end of the operational amplifier；
First calibrating resistance of grounding connection；
The second calibrating resistance is connected with the output end of reference voltage；
Wherein, precision of the precision of first calibrating resistance and second calibrating resistance than the feedback resistance is high
One grade；In a calibration process, the reverse input end of the operational amplifier is unloaded, be connected with first calibrating resistance or with
The second calibrating resistance connection, when empty, the first measurement result is obtained by the output end of the operational amplifier；When with
During the first calibrating resistance connection, the second measurement result is obtained by the output end of the operational amplifier；When with described
When two calibrating resistances connect, the 3rd measurement result is obtained by the output end of the operational amplifier；According to the described first measurement
As a result, second measurement result and the 3rd measurement result obtain the actual value of the reference voltage.
Preferably, in addition to：The voltage check device being connected with the output end of the operational amplifier, it is described for obtaining
First measurement result, obtain second measurement result or obtain the 3rd measurement result.
Preferably, in addition to：
The data processor being connected with the voltage check device, for according to first measurement result, described second
Measurement result and the 3rd measurement result obtain the actual value of the reference voltage.
Preferably, in addition to：
The display being connected with the data processor, the reference voltage obtained for showing the data processor
Actual value.
Preferably, the voltage check device is analog-digital converter ADC.
Preferably, the magnitude of voltage of the calibration voltage is 1.25V.
Preferably, the magnitude of voltage of the reference voltage is 1.8V.
Preferably, the magnitude of voltage of the reference voltage is 2.15V.
Preferably, the model MCP6031 or TSV712 of the operational amplifier.
Preferably, first calibrating resistance and second calibrating resistance are arranged at the outside of the blood glucose meter product；
Wherein, the positive input of the operational amplifier, reverse input end have binding post, for the calibration
The output end of voltage, first calibrating resistance or second calibrating resistance connection.
The calibration circuit of blood glucose meter product provided by the invention, including operational amplifier, feedback resistance, the first calibration electricity
Resistance, the second calibrating resistance.By the way that the reverse input end of operational amplifier is unloaded, the first measurement result is obtained；By operation amplifier
The reverse input end of device is connected with the first calibrating resistance, obtains the second measurement result；By the reverse input end of operational amplifier with
Second calibrating resistance, obtain the 3rd measurement result.Obtained according to the first measurement result, the second measurement result and the 3rd measurement result
Take the actual value of reference voltage.Because the precision of the first calibrating resistance and the second calibrating resistance is higher than feedback in this calibration circuit
One grade of resistance, and can be offset by repeatedly measuring because adjustable resistance is the error during regulation the problem of, because
This improves the precision of the reference voltage of measurement blood glucose meter product.
Brief description of the drawings
In order to illustrate the embodiments of the present invention more clearly, the required accompanying drawing used in embodiment will be done simply below
Introduce, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for ordinary skill people
For member, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of calibration circuit diagram of blood glucose meter product provided by the invention；
Fig. 2 is the calibration circuit diagram of another blood glucose meter product provided by the invention.
Embodiment
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
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Based on this
Embodiment in invention, for those of ordinary skill in the art under the premise of creative work is not made, what is obtained is every other
Embodiment, belong to the scope of the present invention.
The core of the present invention is to provide a kind of calibration circuit of blood glucose meter product.
In order that those skilled in the art more fully understand the present invention program, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.
Fig. 1 is a kind of calibration circuit diagram of blood glucose meter product provided by the invention.The calibration circuit of blood glucose meter product, bag
Include：
Operational amplifier 10, the positive input VinC+ of the operational amplifier 10 and the output end O1 of calibration voltage connect
Connect；
Connect with the reverse input end VinC- of the operational amplifier 10 and the output end vo utC of the operational amplifier 10
The feedback resistance R connectf；
First calibrating resistance R of grounding connection1；
The second calibrating resistance R is connected with the output end O2 of reference voltage2；
Wherein, the first calibrating resistance R1 and the second calibrating resistance R2 precision are than the feedback resistance Rf's
The high grade of precision；In a calibration process, the reverse input end VinC- zero loads of the operational amplifier 10 and first school
Quasi- resistance R1Connection is connected with the second calibrating resistance R2, when empty, is obtained by the output end of the operational amplifier
Take the first measurement result；When with the first calibrating resistance R1During connection, the is obtained by the output end of the operational amplifier
Two measurement results；When with the second calibrating resistance R2During connection, obtain the 3rd by the output end of the operational amplifier and survey
Measure result；The true of the reference voltage is obtained according to first measurement result, the second measurement result and the 3rd measurement result
Value.
Due to measurement result again very important influence of the precision for blood glucose meter product of reference voltage, therefore specific
, it is necessary to ensure the precision of reference voltage in implementation.The purpose of calibration circuit provided by the invention is to carry out school to reference voltage
Standard, detailed process are as follows：
First, by the output end O1 connections of the in-phase input end VinC+ of operational amplifier 10 and calibration voltage to input school
Quasi- voltage, the selection of the calibration voltage can select according to actual conditions, such as can be 1.25V, by operational amplifier 10
Inverting input VinC- is unloaded, by the output end vo utC of the measuring operational amplifier 10 of voltage check device 11 magnitude of voltage,
It is designated as Uout1。
Then, the inverting input VinC- of operational amplifier 10 is connected with first resistor R1, passes through voltage check device
The output end vo utC of 11 measuring operational amplifiers 10 magnitude of voltage, is designated as Uout2。
Wherein, can be with calibration feedback resistance R in the stepf, it is specially：Rf=(Uout2-Uout1)/If1, and If1=Uout1/
R1, If in the calculating formula1To flow through the first calibrating resistance R1Current value.
Secondly, by the inverting input VinC- of operational amplifier 10 and second resistance R2Connection, passes through voltage check device
The output end vo utC of 11 measuring operational amplifiers 10 magnitude of voltage, is designated as Uout3。
Wherein, reference voltage can be calibrated in the step, such as the magnitude of voltage of selection reference voltage is 1.8V.Specially：
If2=(Uout1-Uout3)/Rf, and UR2=If2*R1, then actual value when reference voltage is 1.8V is Vref1.8=UR2+Uout1, should
If in calculating formula2To flow through the second calibrating resistance R2Current value, UR2For the second calibrating resistance R2The voltage at both ends.
Due in above process, by the way that the reverse input end of operational amplifier 10 is connected with the first calibrating resistance, obtaining
The actual value of feedback resistance has been obtained to the second measurement result, and according to the second measurement result, therefore, has been entered to reference voltage
When row calculates, the precision of result of calculation is higher.
The calibration circuit of blood glucose meter product provided by the invention, including operational amplifier, feedback resistance, the first calibration electricity
Resistance, the second calibrating resistance.By the way that the reverse input end of operational amplifier is unloaded, the first measurement result is obtained；By operation amplifier
The reverse input end of device is connected with the first calibrating resistance, obtains the second measurement result；By the reverse input end of operational amplifier with
Second calibrating resistance, obtain the 3rd measurement result.Obtained according to the first measurement result, the second measurement result and the 3rd measurement result
Take the actual value of reference voltage.Because the precision of the first calibrating resistance and the second calibrating resistance is higher than feedback in this calibration circuit
One grade of resistance, and can be offset by repeatedly measuring because adjustable resistance is the error during regulation the problem of, because
This improves the precision of the reference voltage of measurement blood glucose meter product.
Fig. 2 is the calibration circuit diagram of another blood glucose meter product provided by the invention.On the basis of above-described embodiment, blood
The calibration circuit of sugared instrument product, in addition to：The voltage check device 11 being connected with the output end of the operational amplifier 10, is used for
First measurement result is obtained, obtain second measurement result or obtains the 3rd measurement result.
As shown in Fig. 2 voltage check device 11 is connected with the output end end of operational amplifier 10, operational amplifier 10 is obtained
Output result, i.e. the first measurement result, the second measurement result or the 3rd measurement result.Can be fast by voltage check device 11
Speed easily obtains measurement result.The description of other parts refers to an embodiment, wouldn't repeat here.
As a preferred embodiment, the calibration circuit of blood glucose meter product, in addition to：
The data processor 12 being connected with the voltage check device 11, for according to first measurement result, described
Second measurement result and the 3rd measurement result obtain the actual value of the reference voltage.
As shown in Fig. 2 voltage check device 11 can only obtain the first measurement result, the second measurement result and the 3rd measurement knot
Fruit, but the actual value of reference voltage directly can not be obtained according to the above results, therefore, this embodiment of the invention passes through increasing
Add data processor 12, first measurement result, the second measurement result and the 3rd measurement result are carried out by data processor 12
The corresponding actual value that reference voltage is calculated.
It should be noted that, although the present invention does not provide specific programming, but data processor needs basis
Calculation in embodiment enters writing for line program in advance.
As a preferred embodiment, the calibration circuit of blood glucose meter product, in addition to：
The display 13 being connected with the data processor 12, the base obtained for showing the data processor 12
The actual value of quasi- voltage.
In specific implementation, in order to more facilitate, the actual value of reference voltage, this embodiment of the invention are intuitively obtained
Realized by increasing display 13.Specifically as shown in Fig. 2 display 13 is connected with data processor 12, data processor
12 export result to display 13, to realize the purpose of display.Staff passes through the display data on display 13
Obtain the actual value of reference voltage.
As a preferred embodiment, the voltage check device is analog-digital converter ADC.
In specific implementation, voltage check device can be diversified forms, be therein using analog-digital converter
A kind of application scenarios, it can only be a kind of this device not represent.
As a preferred embodiment, the magnitude of voltage of the calibration voltage is 1.25V.
The selection of calibration voltage is various, and the magnitude of voltage that this preferred embodiment is chosen is 1.25V.
As a preferred embodiment, the magnitude of voltage of the reference voltage is 1.8V.
It is identical with the selection of calibration voltage, reference voltage selection and it is various, need to be according to the parameter of blood glucose meter product
Choose, the magnitude of voltage that this preferred embodiment is chosen is 1.25V.
As a preferred embodiment, the magnitude of voltage of the reference voltage is 2.15V.
It is identical with the selection of calibration voltage, reference voltage selection and it is various, need to be according to the parameter of blood glucose meter product
Choose, the magnitude of voltage that this preferred embodiment is chosen is 2.15V.
As a preferred embodiment, the model MCP6031 or TSV712 of the operational amplifier.
In order to ensure the accuracy of result, the operational amplifier in the calibration circuit of blood glucose meter product provided by the invention is
Precision operational-amplifier, its type selecting need to consider the influence factors such as zero shift, low noise.For example, it is desired to consider following parameter：Input
Offset voltage, input bias current etc..It should be noted that offset parameter must than the magnitude of voltage of reference voltage and calibration voltage and
The low quantitative levels of precision of current value.
As a preferred embodiment, first calibrating resistance and second calibrating resistance are arranged at the blood
The outside of sugared instrument product；
Wherein, the positive input of the operational amplifier, reverse input end have binding post, for the calibration
The output end of voltage, first calibrating resistance or second calibrating resistance connection.
, can be by the first calibrating resistance and the second calibrating resistance in specific implementation in order to reduce the volume of blood glucose meter product
The outside of blood glucose meter product is arranged at, when needing calibration, is connected by above-mentioned connection method.It should be noted that when first
When calibrating resistance and the second calibrating resistance are arranged at the outside of blood glucose meter product, then the positive input of operational amplifier and reversely
Input has binding post, is connected for the output end with calibration voltage, first calibrating resistance or the second calibrating resistance.
The calibration circuit of blood glucose meter product provided by the present invention is described in detail above.Tool used herein
Body example is set forth to the principle and embodiment of the present invention, and the explanation of above example is only intended to help and understands this hair
Bright method and its core concept.It should be pointed out that for those skilled in the art, the present invention is not being departed from
On the premise of principle, some improvement and modification can also be carried out to the present invention, these are improved and modification also falls into right of the present invention
It is required that protection domain in.
Claims (10)
- A kind of 1. calibration circuit of blood glucose meter product, it is characterised in that including：Operational amplifier, the positive input of the operational amplifier and the output end of calibration voltage connect；The feedback resistance being connected with the reverse input end of the operational amplifier and the output end of the operational amplifier；First calibrating resistance of grounding connection；The second calibrating resistance is connected with the output end of reference voltage；Wherein, the precision of first calibrating resistance and second calibrating resistance is than the high first-class of precision of the feedback resistance Level；In a calibration process, the reverse input end of the operational amplifier is unloaded, be connected with first calibrating resistance or with it is described Second calibrating resistance connects, and when empty, the first measurement result is obtained by the output end of the operational amplifier；When with it is described When first calibrating resistance connects, the second measurement result is obtained by the output end of the operational amplifier；When with second school During quasi- resistance connection, the 3rd measurement result is obtained by the output end of the operational amplifier；The actual value of the reference voltage obtains especially by below equation：Vref=UR2+Uout1；Wherein, Vref is the actual value of the reference voltage；UR2For the second calibrating resistance R2The voltage at both ends, UR2=If2* R1, If2=(Uout1-Uout3)/Rf, Rf=(Uout2-Uout1)/If1, If1=Uout1/R1；Uout1For first measurement result, Uout2For second measurement result, Uout3For the 3rd measurement result, If1To flow through the first calibrating resistance R1Electricity Flow valuve, If2To flow through the second calibrating resistance R2Current value.
- 2. the calibration circuit of blood glucose meter product according to claim 1, it is characterised in that also include：Put with the computing The voltage check device of the output end connection of big device, for obtaining first measurement result, obtaining second measurement result Or obtain the 3rd measurement result.
- 3. the calibration circuit of blood glucose meter product according to claim 2, it is characterised in that also include：The data processor being connected with the voltage check device, for according to first measurement result, second measurement As a result the actual value of the reference voltage is obtained with the 3rd measurement result.
- 4. the calibration circuit of blood glucose meter product according to claim 3, it is characterised in that also include：The display being connected with the data processor, the reference voltage obtained for showing the data processor it is true Real value.
- 5. the calibration circuit of blood glucose meter product according to claim 2, it is characterised in that the voltage check device is mould Intend digital quantizer ADC.
- 6. the calibration circuit of blood glucose meter product according to claim 1, it is characterised in that the magnitude of voltage of the calibration voltage For 1.25V.
- 7. the calibration circuit of blood glucose meter product according to claim 1, it is characterised in that the magnitude of voltage of the reference voltage For 1.8V.
- 8. the calibration circuit of blood glucose meter product according to claim 1, it is characterised in that the magnitude of voltage of the reference voltage For 2.15V.
- 9. the calibration circuit of blood glucose meter product according to claim 1, it is characterised in that the model of the operational amplifier For MCP6031 or TSV712.
- 10. the calibration circuit of blood glucose meter product according to claim 1, it is characterised in that first calibrating resistance and Second calibrating resistance is arranged at the outside of the blood glucose meter product；Wherein, the positive input of the operational amplifier, reverse input end have binding post, for the calibration voltage Output end, first calibrating resistance or second calibrating resistance connection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510480984.2A CN105137052B (en) | 2015-08-07 | 2015-08-07 | A kind of calibration circuit of blood glucose meter product |
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| CN201510480984.2A CN105137052B (en) | 2015-08-07 | 2015-08-07 | A kind of calibration circuit of blood glucose meter product |
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| CN105137052A CN105137052A (en) | 2015-12-09 |
| CN105137052B true CN105137052B (en) | 2018-03-06 |
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| CN107389743B (en) * | 2017-06-14 | 2020-04-07 | 广州视源电子科技股份有限公司 | Measurement precision detection method of blood test instrument and blood test instrument |
| CN107561147B (en) * | 2017-08-31 | 2020-02-04 | 三诺生物传感股份有限公司 | Detection circuit, calibration method and device for current of glucometer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5867065B2 (en) * | 2011-12-22 | 2016-02-24 | 株式会社ソシオネクスト | Step-down power supply circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1679576A2 (en) * | 2005-01-11 | 2006-07-12 | International Business Machines Corporation | Method, system and calibration technique for power measurement and management over multiple time frames |
| CN101753139A (en) * | 2008-12-11 | 2010-06-23 | 西门子公司 | Switching unit for generating an output voltage as a function of a digital data valve and method for calibrating the switching unit |
Non-Patent Citations (2)
| Title |
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| 一种数字自动校准运放失调电压技术;郭书苞等;《电子器件》;20061231;第29卷(第4期);1147-1150 * |
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