CN105137052A - Blood glucose meter product calibration circuit - Google Patents
Blood glucose meter product calibration circuit Download PDFInfo
- Publication number
- CN105137052A CN105137052A CN201510480984.2A CN201510480984A CN105137052A CN 105137052 A CN105137052 A CN 105137052A CN 201510480984 A CN201510480984 A CN 201510480984A CN 105137052 A CN105137052 A CN 105137052A
- Authority
- CN
- China
- Prior art keywords
- measurement result
- blood glucose
- glucose meter
- operational amplifier
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Investigating Or Analysing Biological Materials (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The present invention discloses a blood glucose meter product calibration circuit, which comprises a calculation amplifier, a feedback resistor, a first calibration resistor and a second calibration resistor, wherein the inverted input terminal of the calculation amplifier is subjected to zero load to obtain a first measurement result, the inverted input terminal of the calculation amplifier is connected with the first calibration resistor to obtain a second measurement result, the inverted input terminal of the calculation amplifier is connected with the second calibration resistor to obtain a third measurement result, and according to the first measurement result, the second measurement result and the third measurement result, the true value of the reference voltage is obtained. According to the present invention, in the calibration circuit, the precisions of the first calibration resistor and the second calibration resistor are one-grade higher than the feedback resistor, and the error of the adjustable resistor during the adjusting process can be counteracted through the multiple measurements, such that the measurement precision of the reference voltage of the blood glucose meter product is improved.
Description
Technical field
The present invention relates to circuit engineering field, particularly relate to a kind of calibration circuit of blood glucose meter product.
Background technology
Along with the development of science and technology, blood glucose meter product is more and more widely used, such as, and hospital blood glucose meter product, home-use blood glucose instrument product.The input voltage of blood glucose meter product, namely the precision of reference voltage has important impact for measurement result.If reference voltage actual value and theoretical value have big difference, then measurement result also has deviation.The calibration of the reference voltage of existing blood glucose meter product has mainly been combined by adjustable resistance, operational amplifier etc.Due to the impact of the precision of adjustable resistance own and adjustment process comparatively complicated, make troubles therefore to the calibration of the reference voltage of blood glucose meter product, and precision is lower.
As can be seen here, the precision how improving the reference voltage measuring blood glucose meter product is those skilled in the art's problem demanding prompt solutions.
Summary of the invention
The object of this invention is to provide a kind of calibration circuit of blood glucose meter product, for improving the precision of the reference voltage measuring blood glucose meter product.
For solving the problems of the technologies described above, the invention provides a kind of calibration circuit of blood glucose meter product, comprising:
Operational amplifier, the positive input of described operational amplifier is connected with the output terminal of calibration voltage;
The feedback resistance be connected with the reverse input end of described operational amplifier and the output terminal of described operational amplifier;
First calibrated resistance of grounding connection;
The second calibrated resistance is connected with the output terminal of reference voltage;
Wherein, all high than the precision of the described feedback resistance grade of the precision of described first calibrated resistance and described second calibrated resistance; In a calibration process, the reverse input end of described operational amplifier is unloaded, be connected with described first calibrated resistance or be connected with described second calibrated resistance, when empty, obtains the first measurement result by the output terminal of described operational amplifier; When being connected with described first calibrated resistance, obtain the second measurement result by the output terminal of described operational amplifier; When being connected with described second calibrated resistance, obtain the 3rd measurement result by the output terminal of described operational amplifier; The actual value of described reference voltage is obtained according to described first measurement result, described second measurement result and described 3rd measurement result.
Preferably, also comprise: the voltage check device be connected with the output terminal of described operational amplifier, for obtaining described first measurement result, obtaining described second measurement result or obtaining described 3rd measurement result.
Preferably, also comprise:
The data processor be connected with described voltage check device, for obtaining the actual value of described reference voltage according to described first measurement result, described second measurement result and described 3rd measurement result.
Preferably, also comprise:
The display be connected with described data processor, for showing the actual value of the described reference voltage that described data processor obtains.
Preferably, described voltage check device is analog-digital converter ADC.
Preferably, the magnitude of voltage of described calibration voltage is 1.25V.
Preferably, the magnitude of voltage of described reference voltage is 1.8V.
Preferably, the magnitude of voltage of described reference voltage is 2.15V.
Preferably, the model of described operational amplifier is MCP6031 or TSV712.
Preferably, described first calibrated resistance and described second calibrated resistance are arranged at the outside of described blood glucose meter product;
Wherein, positive input, the reverse input end of described operational amplifier have connection terminal, for being connected with the output terminal of described calibration voltage, described first calibrated resistance or described second calibrated resistance.
The calibration circuit of blood glucose meter product provided by the invention, comprises operational amplifier, feedback resistance, the first calibrated resistance, the second calibrated resistance.By the reverse input end of operational amplifier is unloaded, obtain the first measurement result; The reverse input end of operational amplifier is connected with the first calibrated resistance, obtains the second measurement result; By the reverse input end of operational amplifier and the second calibrated resistance, obtain the 3rd measurement result.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 calibrated resistance and the second calibrated resistance in this calibration circuit is higher than feedback resistance grade, and the problem due to the error of adjustable resistance in adjustment process can be offset by repetitive measurement, therefore improve the precision of the reference voltage measuring blood glucose meter product.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention, simple introduction is done below by the accompanying drawing used required in embodiment, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the calibration circuit figure of a kind of blood glucose meter product provided by the invention;
Fig. 2 is the calibration circuit figure of another kind of blood glucose meter product provided by the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are not making under creative work prerequisite, and the every other embodiment obtained, all belongs to scope.
Core of the present invention is to provide a kind of calibration circuit of blood glucose meter product.
In order to make those skilled in the art person understand the present invention program better, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is the calibration circuit figure of a kind of blood glucose meter product provided by the invention.The calibration circuit of blood glucose meter product, comprising:
Operational amplifier 10, the positive input VinC+ of described operational amplifier 10 is connected with the output terminal O1 of calibration voltage;
The feedback resistance R be connected with the reverse input end VinC-of described operational amplifier 10 and the output end vo utC of described operational amplifier 10
f;
First calibrated resistance R of grounding connection
1;
The second calibrated resistance R is connected with the output terminal O2 of reference voltage
2;
Wherein, the precision of described first calibrated resistance R1 and described second calibrated resistance R2 is all than described feedback resistance R
fthe high grade of precision; In a calibration process, the reverse input end VinC-of described operational amplifier 10 unloaded, with described first calibrated resistance R
1connect or be connected with described second calibrated resistance R2, when empty, obtaining the first measurement result by the output terminal of described operational amplifier; When with described first calibrated resistance R
1during connection, obtain the second measurement result by the output terminal of described operational amplifier; When with described second calibrated resistance R
2during connection, obtain the 3rd measurement result by the output terminal of described operational amplifier; The actual value of described reference voltage is obtained according to described first measurement result, the second measurement result and the 3rd measurement result.
Because the precision of reference voltage is for the measurement result very important impact again of blood glucose meter product, therefore in concrete enforcement, need the precision ensureing reference voltage.The object of calibration circuit provided by the invention will be calibrated reference voltage, and detailed process is as follows:
First, the in-phase input end VinC+ of operational amplifier 10 is connected to input calibration voltage with the output terminal O1 of calibration voltage, choosing of this calibration voltage can be selected according to actual conditions, can be such as 1.25V, the inverting input VinC-of operational amplifier 10 is unloaded, by the magnitude of voltage of the output end vo utC of voltage check device 11 measuring operational amplifier 10, be designated as U
out1.
Then, the inverting input VinC-of operational amplifier 10 is connected with the first resistance R1, by the magnitude of voltage of the output end vo utC of voltage check device 11 measuring operational amplifier 10, is designated as U
out2.
Wherein, can calibration feedback resistance R in this step
f, be specially: R
f=(U
out2-U
out1)/If
1, and If
1=U
out1/ R
1, If in this calculating formula
1for flowing through the first calibrated resistance R
1current value.
Secondly, by the inverting input VinC-of operational amplifier 10 and the second resistance R
2connect, by the magnitude of voltage of the output end vo utC of voltage check device 11 measuring operational amplifier 10, be designated as U
out3.
Wherein, can calibration reference voltage in this step, the magnitude of voltage such as choosing reference voltage is 1.8V.Be specially: If
2=(U
out1-U
out3)/R
f, and U
r2=If
2* R
1, then actual value when reference voltage is 1.8V is Vref
1.8=U
r2+ U
out1, If in this calculating formula
2for flowing through the second calibrated resistance R
2current value, U
r2be the second calibrated resistance R
2the voltage at two ends.
Due in above process, by being connected with the first calibrated resistance by the reverse input end of operational amplifier 10, obtain the second measurement result, and the actual value of feedback resistance is obtained according to the second measurement result, therefore, when calculating reference voltage, the precision of result of calculation is higher.
The calibration circuit of blood glucose meter product provided by the invention, comprises operational amplifier, feedback resistance, the first calibrated resistance, the second calibrated resistance.By the reverse input end of operational amplifier is unloaded, obtain the first measurement result; The reverse input end of operational amplifier is connected with the first calibrated resistance, obtains the second measurement result; By the reverse input end of operational amplifier and the second calibrated resistance, obtain the 3rd measurement result.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 calibrated resistance and the second calibrated resistance in this calibration circuit is higher than feedback resistance grade, and the problem due to the error of adjustable resistance in adjustment process can be offset by repetitive measurement, therefore improve the precision of the reference voltage measuring blood glucose meter product.
Fig. 2 is the calibration circuit figure of another kind of blood glucose meter product provided by the invention.On the basis of above-described embodiment, the calibration circuit of blood glucose meter product, also comprise: the voltage check device 11 be connected with the output terminal of described operational amplifier 10, for obtaining described first measurement result, obtaining described second measurement result or obtaining described 3rd measurement result.
As shown in Figure 2, voltage check device 11 is connected with the output terminal end of operational amplifier 10, obtains the Output rusults of operational amplifier 10, i.e. the first measurement result, the second measurement result or the 3rd measurement result.Measurement result can be obtained quickly and easily by voltage check device 11.The description of other parts refers to an embodiment, wouldn't repeat here.
As one preferred embodiment, the calibration circuit of blood glucose meter product, also comprises:
The data processor 12 be connected with described voltage check device 11, for obtaining the actual value of described reference voltage according to described first measurement result, described second measurement result and described 3rd measurement result.
As shown in Figure 2, voltage check device 11 can only obtain the first measurement result, the second measurement result and the 3rd measurement result, but the actual value of reference voltage directly can not be obtained according to the above results, therefore, this embodiment of the present invention, by increasing data processor 12, calculates the actual value of reference voltage accordingly to the first measurement result, the second measurement result and the 3rd measurement result by data processor 12.
It should be noted that, although the present invention does not provide concrete program design, data processor needs to carry out writing of program in advance according to the account form in embodiment.
As one preferred embodiment, the calibration circuit of blood glucose meter product, also comprises:
The display 13 be connected with described data processor 12, for showing the actual value of the described reference voltage that described data processor 12 obtains.
In concrete enforcement, in order to convenient, obtain the actual value of reference voltage intuitively, this embodiment of the present invention realizes by increasing display 13.Concrete be connected with data processor 12 by display 13, data processor 12 exports result to display 13 as shown in Figure 2, to realize the object shown.Staff just can obtain the actual value of reference voltage by the display data on display 13.
As one preferred embodiment, described voltage check device is analog-digital converter ADC.
In concrete enforcement, voltage check device can be various ways, and employing analog-digital converter is a kind of application scenarios wherein, and not representing can only be this kind of device.
As one preferred embodiment, the magnitude of voltage of described calibration voltage is 1.25V.
Choosing of calibration voltage is various, and the magnitude of voltage that this optimal way is chosen is 1.25V.
As one preferred embodiment, the magnitude of voltage of described reference voltage is 1.8V.
Identical with choosing of calibration voltage, choosing of reference voltage is also various, need according to the parameter choose of blood glucose meter product, and the magnitude of voltage that this optimal way is chosen is 1.25V.
As one preferred embodiment, the magnitude of voltage of described reference voltage is 2.15V.
Identical with choosing of calibration voltage, choosing of reference voltage is also various, need according to the parameter choose of blood glucose meter product, and the magnitude of voltage that this optimal way is chosen is 2.15V.
As one preferred embodiment, the model of described operational amplifier is MCP6031 or TSV712.
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, and its type selecting need consider the influence factor such as zero shift, low noise.Such as, need to consider following parameter: input offset voltage, input bias current etc.It should be noted that, offset parameter must than reference voltage and the magnitude of voltage of calibration voltage and the low quantitative levels of the precision of current value.
As one preferred embodiment, described first calibrated resistance and described second calibrated resistance are arranged at the outside of described blood glucose meter product;
Wherein, positive input, the reverse input end of described operational amplifier have connection terminal, for being connected with the output terminal of described calibration voltage, described first calibrated resistance or described second calibrated resistance.
In order to reduce the volume of blood glucose meter product, in concrete enforcement, the first calibrated resistance and the second calibrated resistance can be arranged at the outside of blood glucose meter product, when needs are calibrated, be connected by above-mentioned method of attachment.It should be noted that, when the first calibrated resistance and the second calibrated resistance are arranged at blood glucose meter product outside, then the positive input of operational amplifier and reverse input end have connection terminal, for being connected with the output terminal of calibration voltage, described first calibrated resistance or the second calibrated resistance.
Above the calibration circuit of blood glucose meter product provided by the present invention is described in detail.Apply specific case herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (10)
1. a calibration circuit for blood glucose meter product, is characterized in that, comprising:
Operational amplifier, the positive input of described operational amplifier is connected with the output terminal of calibration voltage;
The feedback resistance be connected with the reverse input end of described operational amplifier and the output terminal of described operational amplifier;
First calibrated resistance of grounding connection;
The second calibrated resistance is connected with the output terminal of reference voltage;
Wherein, all high than the precision of the described feedback resistance grade of the precision of described first calibrated resistance and described second calibrated resistance; In a calibration process, the reverse input end of described operational amplifier is unloaded, be connected with described first calibrated resistance or be connected with described second calibrated resistance, when empty, obtains the first measurement result by the output terminal of described operational amplifier; When being connected with described first calibrated resistance, obtain the second measurement result by the output terminal of described operational amplifier; When being connected with described second calibrated resistance, obtain the 3rd measurement result by the output terminal of described operational amplifier; The actual value of described reference voltage is obtained according to described first measurement result, described second measurement result and described 3rd measurement result.
2. the calibration circuit of blood glucose meter product according to claim 1, it is characterized in that, also comprise: the voltage check device be connected with the output terminal of described operational amplifier, for obtaining described first measurement result, obtaining described second measurement result or obtaining described 3rd measurement result.
3. the calibration circuit of blood glucose meter product according to claim 2, is characterized in that, also comprise:
The data processor be connected with described voltage check device, for obtaining the actual value of described reference voltage according to described first measurement result, described second measurement result and described 3rd measurement result.
4. the calibration circuit of blood glucose meter product according to claim 3, is characterized in that, also comprise:
The display be connected with described data processor, for showing the actual value of the described reference voltage that described data processor obtains.
5. the calibration circuit of blood glucose meter product according to claim 2, is characterized in that, described voltage check device is analog-digital converter ADC.
6. the calibration circuit of blood glucose meter product according to claim 1, is characterized in that, the magnitude of voltage of described calibration voltage is 1.25V.
7. the calibration circuit of blood glucose meter product according to claim 1, is characterized in that, the magnitude of voltage of described reference voltage is 1.8V.
8. the calibration circuit of blood glucose meter product according to claim 1, is characterized in that, the magnitude of voltage of described reference voltage is 2.15V.
9. the calibration circuit of blood glucose meter product according to claim 1, is characterized in that, the model of described operational amplifier is MCP6031 or TSV712.
10. the calibration circuit of blood glucose meter product according to claim 1, is characterized in that, described first calibrated resistance and described second calibrated resistance are arranged at the outside of described blood glucose meter product;
Wherein, positive input, the reverse input end of described operational amplifier have connection terminal, for being connected with the output terminal of described calibration voltage, described first calibrated resistance or described second calibrated resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510480984.2A CN105137052B (en) | 2015-08-07 | 2015-08-07 | A kind of calibration circuit of blood glucose meter product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510480984.2A CN105137052B (en) | 2015-08-07 | 2015-08-07 | A kind of calibration circuit of blood glucose meter product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105137052A true CN105137052A (en) | 2015-12-09 |
| CN105137052B CN105137052B (en) | 2018-03-06 |
Family
ID=54722477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510480984.2A Active CN105137052B (en) | 2015-08-07 | 2015-08-07 | A kind of calibration circuit of blood glucose meter product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105137052B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107389743A (en) * | 2017-06-14 | 2017-11-24 | 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 |
| CN107561147A (en) * | 2017-08-31 | 2018-01-09 | 三诺生物传感股份有限公司 | A kind of detection circuit, calibration method and the device of blood glucose meter electric current |
Citations (3)
| 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 |
| US20130162227A1 (en) * | 2011-12-22 | 2013-06-27 | Fujitsu Semiconductor Limited | Step-down power supply circuit |
-
2015
- 2015-08-07 CN CN201510480984.2A patent/CN105137052B/en active Active
Patent Citations (3)
| 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 |
| US20130162227A1 (en) * | 2011-12-22 | 2013-06-27 | Fujitsu Semiconductor Limited | Step-down power supply circuit |
Non-Patent Citations (2)
| Title |
|---|
| 余学锋等: "提高运算放大器增益校准精度的方法", 《计量与测试技术》 * |
| 郭书苞等: "一种数字自动校准运放失调电压技术", 《电子器件》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107389743A (en) * | 2017-06-14 | 2017-11-24 | 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 |
| CN107561147A (en) * | 2017-08-31 | 2018-01-09 | 三诺生物传感股份有限公司 | A kind of detection circuit, calibration method and the device of blood glucose meter electric current |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105137052B (en) | 2018-03-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108089141B (en) | Error correction method and device of current measuring device based on current divider | |
| JP2015527044A (en) | Input power and current measurement system and method | |
| CN105306056A (en) | Scale factor temperature compensating method of current frequency conversion circuit | |
| CN105259528A (en) | Internal calibration circuit of microwave power probe and calibration method | |
| CN103969614A (en) | Calibration method for digital multimeter | |
| CN104483650A (en) | Calibration method for ammeter | |
| CN108508270B (en) | Resistance measuring circuit | |
| CN103455078B (en) | A kind of current-limiting circuit, device | |
| CN105137052A (en) | Blood glucose meter product calibration circuit | |
| CN101828100A (en) | Temperature measurement circuit in flowmeter | |
| CN203881815U (en) | Simple high-precision DC electronic load | |
| CN107861091B (en) | Dynamic performance tracing method based on dynamic electric energy calibrator | |
| CN103575976B (en) | A kind of pure 90 degree of phase shift reactive power measuring methods | |
| CN109470913B (en) | Method for reversely deducing power supply voltage through reference voltage | |
| CN201429424Y (en) | Differential resistance sensor detection circuit | |
| CN108572273B (en) | Low current measuring circuit and measuring method thereof | |
| CN203479906U (en) | Four-wire system Pt100 resistor measuring circuit | |
| CN101499801B (en) | A/D conversion circuit and conversion method thereof | |
| CN103575975A (en) | Constant-90-degree phase shift type reactive power measurement circuit | |
| KR101606232B1 (en) | Electronic watt-hour meter | |
| CN203811592U (en) | Accuracy guarantee circuit for gas quantitative surveymeter | |
| CN105353295A (en) | Operation amplifier gain measurement circuit | |
| CN204833036U (en) | Calibrating device based on many voltage reference | |
| CN103149417A (en) | Circuit measuring module and method for measuring voltage difference of power source device | |
| CN206531898U (en) | A kind of precision resistance measuring circuit based on amplifier technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |