CN102499661A - Highly integrated electronic sphygmomanometer circuit - Google Patents
Highly integrated electronic sphygmomanometer circuit Download PDFInfo
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- CN102499661A CN102499661A CN2011103190131A CN201110319013A CN102499661A CN 102499661 A CN102499661 A CN 102499661A CN 2011103190131 A CN2011103190131 A CN 2011103190131A CN 201110319013 A CN201110319013 A CN 201110319013A CN 102499661 A CN102499661 A CN 102499661A
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- pressure transducer
- electric sphygmomanometer
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Abstract
The invention provides a highly integrated electronic sphygmomanometer circuit, which comprises a pressure sensor, a constant current source/constant voltage source, a programmable gain amplifier, an analog-to-digital converter and a single-chip core, wherein the pressure sensor is used for receiving a human body blood pressure signal; the constant current source/constant voltage source is used for providing a constant current/voltage to the pressure sensor; the programmable gain amplifier is used for receiving a differential input positive and negative pressure signal of the pressure sensor and adjusting to required gain amplification; the analog-to-digital converter is used for performing analog-to-digital conversion on the positive and negative pressure signal after the gain amplification; the single-chip core is used for controlling the entire electronic sphygmomanometer circuit to perform data operation, processing or interruption; and the constant current source/constant voltage source, the programmable gain amplifier, the analog-to-digital converter and the single-chip core are integrated on a chip. The circuit is highly integrated, and a fully differential input analog-to-digital conversion module is built in the chip, so that the number of peripheral separation components can be reduced and the accuracy of a measured signal is improved.
Description
Technical field
The present invention relates to the single chip circuit technical field, specifically, the present invention relates to the integrated electric sphygmomanometer circuit of a kind of height.
Background technology
The most oscillographic methods that adopt of noinvasive electric sphygmomanometer or Blood pressure monitor.Fig. 1 is the sketch map of an electric sphygmomanometer circuit of prior art, and is as shown in the figure, and this electric sphygmomanometer circuit 100 can comprise:
Constant-current source/constant pressure source 103 is connected with pressure transducer, is used for to pressure transducer constant current/voltage being provided;
Analog-digital converter 111 is connected with signal amplifier with instrument amplifier respectively, is used for the pressure signal of instrument amplifier output and the pulse signal of signal amplifier output are carried out analog digital conversion; And
Single-chip microcomputer nuclear 113 is connected with analog-digital converter, is used to control whole electric sphygmomanometer circuit, carries out data operation, processing or interruption;
Wherein, constant-current source/constant pressure source 103, instrument amplifier 105, band filter 107, signal amplifier 109, analog-digital converter 111 and single-chip microcomputer nuclear 113 are integrated on the chip 115.
The defective that above-mentioned existing electric sphygmomanometer circuit exists comprises at least:
(1) electric sphygmomanometer design circuit cost is higher at present, complicated circuit, and discrete electronic devices and components are more, so system stability is also relatively poor;
(2) current electric sphygmomanometer mainly adopts discrete electronic devices and components to realize signals collecting; Acquisition Circuit comprises filter circuit, amplifying circuit etc.; Therefore gather the influence that receives system noise easily, be very big like air pump/air valve noise when working, thereby influence the blood pressure computational accuracy;
(3) there is consistency problem in discrete electronic devices and components, also will influence the system signal collection, and when producing, debugging is complicated, and fault is many, increases production cost;
(4) peripheral component causes the consistency problem of device more, influences certainty of measurement, increases the complexity of software processes;
(5) the pressure transducer bias voltage need be through the peripheral components adjustment.
Summary of the invention
Technical problem to be solved by this invention provides the integrated electric sphygmomanometer circuit of a kind of height, can reduce the quantity of peripheral separating component, improves precision of signal.
For solving the problems of the technologies described above, the present invention provides a kind of height integrated electric sphygmomanometer circuit, comprising:
Pressure transducer is used to receive the human body blood pressure signal;
Constant-current source/constant pressure source is connected with said pressure transducer, is used for to said pressure transducer constant current/voltage being provided;
Programmable gain amplifier is connected with said pressure transducer, is used to receive the difference input positive/negative pressure signal of said pressure transducer and is adjusted to required gain amplify;
Analog-digital converter is connected with said programmable gain amplifier, is used for the said positive/negative pressure signal after the gain amplification is carried out analog digital conversion; And
Single-chip microcomputer nuclear is connected with said analog-digital converter, is used to control whole electric sphygmomanometer circuit, carries out data operation, processing or interruption;
Wherein, said constant-current source/constant pressure source, programmable gain amplifier, analog-digital converter and single-chip microcomputer nuclear are integrated on the chip.
Alternatively, said programmable gain amplifier is made up of operational amplifier or is made up of the sampling capacitance ratio of said analog-digital converter.
Alternatively, said analog-digital converter has the above precision of 12bit.
Alternatively, said constant-current source/constant pressure source is realized by the interior operational amplifier of building.
Alternatively, said pressure transducer is the bridge type pressure transducer.
Compared with prior art, the present invention has the following advantages:
(1) the present invention adopts chip built-in fully differential input analog-to-digital conversion module, and the positive/negative pressure sensor signal can directly be imported, and gets final product calibrating (base measuring) pressure pick off zero pressure bias voltage through internal circuit;
(2) the present invention is highly integrated, saves a large amount of peripheral component costs, produces debugging conveniently;
(3) blood pressure signal collection of the present invention is stable, and certainty of measurement is higher;
(4) internal circuit of the present invention can adapt to the bias voltage of various pressure transducers, realizes automatically through software, need not manual adjustment zero pressure bias voltage.
Description of drawings
Above-mentioned and other characteristic, character and advantage of the present invention will become more obvious through the description below in conjunction with accompanying drawing and embodiment, wherein:
Fig. 1 is the sketch map of an electric sphygmomanometer circuit of prior art;
Fig. 2 is the sketch map of the integrated electric sphygmomanometer circuit of the height of one embodiment of the invention.
The specific embodiment
Below in conjunction with specific embodiment and accompanying drawing the present invention is described further; Set forth more details in the following description so that make much of the present invention; But the present invention obviously can implement with multiple this description ground alternate manner that is different from; Those skilled in the art can do similar popularization, deduction according to practical situations under the situation of intension of the present invention, therefore should be with content constraints protection scope of the present invention of this specific embodiment.
Fig. 2 is the sketch map of the integrated electric sphygmomanometer circuit of the height of one embodiment of the invention.As shown in the figure, this electric sphygmomanometer circuit 200 can comprise: pressure transducer 203, constant-current source/constant pressure source 205, analog-to-digital conversion module 211 and single-chip microcomputer nuclear 213.
Wherein, pressure transducer 203 is connected with the cuff 201 of electric sphygmomanometer, is used to receive the human body blood pressure signal.In the present embodiment, this pressure transducer 203 can be the bridge type pressure transducer.Constant-current source/constant pressure source 205 is connected with pressure transducer 203, is used for to pressure transducer 203 constant current/voltage being provided, and generally can be realized by the interior operational amplifier of building.
Analog-to-digital conversion module 211 further comprises programmable gain amplifier 207 and analog-digital converter 209.Programmable gain amplifier 207 is connected with pressure transducer 203; Be used to receive the difference input positive/negative pressure signal of pressure transducer 203 and be adjusted to required gain and amplify, it can be formed or be made up of the sampling capacitance ratio of analog-digital converter 209 by operational amplifier.
Analog-digital converter 209 is connected with programmable gain amplifier 207, is used for the positive/negative pressure signal after the gain amplification is carried out analog digital conversion.This analog-digital converter 209 has higher precision, for example the above precision of 12bit.The difference input pattern is specially adapted to bridge type pressure transducer (using like electric sphygmomanometer); When difference import positive negative signal near or when equal, just in time be the centre of analog-digital converter 209 input ranges; When positive signal is the first half of analog-digital converter 209 input ranges greater than negative signal; When positive signal is the latter half of analog-digital converter 209 input ranges less than negative signal.Analog-digital converter 209 converts digital data transmission into to single-chip microcomputer nuclear 213 according to different analog inputs.
High-precision analog-digital converter 209 through oscillographic method, can accurately be told the signal of the beat pulse in the cuff 201 because precision is higher, guarantees the computational accuracy of blood pressure algorithm, thereby makes systolic pressure/diastolic pressure of drawing science, accurately more.
Single-chip microcomputer nuclear 213 is connected with analog-digital converter 209, is used to control whole electric sphygmomanometer circuit 200, carries out data operation, processing or interruption.Wherein, constant-current source/constant pressure source 205, programmable gain amplifier 207, analog-digital converter 209 and single-chip microcomputer nuclear 213 are integrated on the chip 215.
Compared with prior art, the present invention has the following advantages:
(1) the present invention adopts chip built-in fully differential input analog-to-digital conversion module, and the positive/negative pressure sensor signal can directly be imported, and gets final product calibrating (base measuring) pressure pick off zero pressure bias voltage through internal circuit;
(2) the present invention is highly integrated, saves a large amount of peripheral component costs, produces debugging conveniently;
(3) blood pressure signal collection of the present invention is stable, and certainty of measurement is higher;
(4) internal circuit of the present invention can adapt to the bias voltage of various pressure transducers, realizes automatically through software, need not manual adjustment zero pressure bias voltage.
Though the present invention with preferred embodiment openly as above, it is not to be used for limiting the present invention, and any those skilled in the art are not breaking away from the spirit and scope of the present invention, can make possible change and modification.Therefore, every content that does not break away from technical scheme of the present invention, according to technical spirit of the present invention to any modification, equivalent variations and modification that above embodiment did, within the protection domain that all falls into claim of the present invention and defined.
Claims (5)
1. highly integrated electric sphygmomanometer circuit (200) comprising:
Pressure transducer (203) is used to receive the human body blood pressure signal;
Constant-current source/constant pressure source (205) is connected with said pressure transducer (203), is used for to said pressure transducer (203) constant current/voltage being provided;
Programmable gain amplifier (207) is connected with said pressure transducer (203), is used to receive the difference input positive/negative pressure signal of said pressure transducer (203) and is adjusted to required gain amplify;
Analog-digital converter (209) is connected with said programmable gain amplifier (207), is used for the said positive/negative pressure signal after the gain amplification is carried out analog digital conversion; And
Single-chip microcomputer nuclear (213) is connected with said analog-digital converter (209), is used to control whole electric sphygmomanometer circuit (200), carries out data operation, processing or interruption;
Wherein, said constant-current source/constant pressure source (205), programmable gain amplifier (207), analog-digital converter (209) and single-chip microcomputer nuclear (213) are integrated on the chip (215).
2. electric sphygmomanometer circuit according to claim 1 (200) is characterized in that, said programmable gain amplifier (207) is made up of operational amplifier or is made up of the sampling capacitance ratio of said analog-digital converter (209).
3. electric sphygmomanometer circuit according to claim 2 (200) is characterized in that, said analog-digital converter (209) has the above precision of 12bit.
4. electric sphygmomanometer circuit according to claim 3 (200) is characterized in that, said constant-current source/constant pressure source (205) is realized by the interior operational amplifier of building.
5. electric sphygmomanometer circuit according to claim 4 (200) is characterized in that, said pressure transducer (203) is the bridge type pressure transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103190131A CN102499661A (en) | 2011-10-19 | 2011-10-19 | Highly integrated electronic sphygmomanometer circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103190131A CN102499661A (en) | 2011-10-19 | 2011-10-19 | Highly integrated electronic sphygmomanometer circuit |
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| Publication Number | Publication Date |
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| CN102499661A true CN102499661A (en) | 2012-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011103190131A Pending CN102499661A (en) | 2011-10-19 | 2011-10-19 | Highly integrated electronic sphygmomanometer circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111756377A (en) * | 2020-07-29 | 2020-10-09 | 上腾科技(广州)有限公司 | A signal acquisition circuit and a signal sampling method for gain adaptive transformation |
| CN112294279A (en) * | 2020-10-29 | 2021-02-02 | 江西理工大学 | Integrated invasive blood pressure sensor |
| CN114812846A (en) * | 2022-04-13 | 2022-07-29 | 湖南四灵电子科技有限公司 | Temperature sampling circuit compatible with positive and negative temperature coefficient sensors |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040225224A1 (en) * | 2003-05-05 | 2004-11-11 | Tseng Daniel C.M. | Integrated inflating and quick releasing device for electronic sphygmomanometer |
| JP2007125246A (en) * | 2005-11-04 | 2007-05-24 | Terumo Corp | Blood pressure measurement apparatus and cuff used for the same |
| CN102048527A (en) * | 2010-12-06 | 2011-05-11 | 中颖电子股份有限公司 | Electronic sphygmomanometer circuit |
-
2011
- 2011-10-19 CN CN2011103190131A patent/CN102499661A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040225224A1 (en) * | 2003-05-05 | 2004-11-11 | Tseng Daniel C.M. | Integrated inflating and quick releasing device for electronic sphygmomanometer |
| JP2007125246A (en) * | 2005-11-04 | 2007-05-24 | Terumo Corp | Blood pressure measurement apparatus and cuff used for the same |
| CN102048527A (en) * | 2010-12-06 | 2011-05-11 | 中颖电子股份有限公司 | Electronic sphygmomanometer circuit |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111756377A (en) * | 2020-07-29 | 2020-10-09 | 上腾科技(广州)有限公司 | A signal acquisition circuit and a signal sampling method for gain adaptive transformation |
| CN112294279A (en) * | 2020-10-29 | 2021-02-02 | 江西理工大学 | Integrated invasive blood pressure sensor |
| CN112294279B (en) * | 2020-10-29 | 2024-06-25 | 江西理工大学 | Integrated invasive blood pressure sensor |
| CN114812846A (en) * | 2022-04-13 | 2022-07-29 | 湖南四灵电子科技有限公司 | Temperature sampling circuit compatible with positive and negative temperature coefficient sensors |
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Application publication date: 20120620 |
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