CN104639120A - Filter shaping circuit for heart rate collection - Google Patents
Filter shaping circuit for heart rate collection Download PDFInfo
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- CN104639120A CN104639120A CN201310572160.9A CN201310572160A CN104639120A CN 104639120 A CN104639120 A CN 104639120A CN 201310572160 A CN201310572160 A CN 201310572160A CN 104639120 A CN104639120 A CN 104639120A
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- resistance
- heart rate
- polar capacitor
- shaping circuit
- resistor
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Abstract
The invention discloses a filter shaping circuit for heart rate collection. The filter shaping circuit comprises a first resistor, a second resistor, a third resistor, a forth resistor, an amplifier, a first polar capacitor, a second polar capacitor, a first Schmitt trigger, a second Schmitt trigger, a third Schmitt trigger and a direct-current power supply; the first resistor, the second resistor, the first polar capacitor and the second polar capacitor form a filter circuit, the amplifier is used for amplifying signals, the first Schmitt trigger to the third Schmitt trigger are used for shaping irregular spike pulses into square pulses, and outputted signals can be directly counted through a backward stage single-chip microcontroller. The voltage signals outputted by a heart rate collection sensor are filtered, amplified and shaped, the square pulse signals capable of being directly counted by the single-chip microcontroller are outputted, accurate collection of the heart rate signals is realized, and applications of various heart rate collectors of heat rate collectors, blood pressure monitors, pulse rate meters and the like are facilitated. The filter shaping circuit is simple in structure and low in cost.
Description
Technical field
The present invention relates to a kind of filtering shaping circuit, particularly relate to a kind of filtering shaping circuit gathered for heart rate.
Background technology
Heart rate, as important vital sign, contains abundant human life information.After one's own heart rate collector, sphygmomanometer, pulse counting device can gather heartbeat signal to existing comparatively multi-product now, these products are used for carrying out the functions such as daily heart rate test, storage, warning, monitoring in real time, and the old and the weak crowds such as patient, old man, child that can be offer convenience.Existing heart rate gathers product, and its filter amplification circuit is comparatively complicated, and the pulse signal exported is comparatively sharp-pointed, is not suitable for single-chip microcomputer and directly counts.
Summary of the invention
Object of the present invention is just that providing a kind of to solve the problem exports the filtering shaping circuit gathered for heart rate that square-wave pulse is convenient to directly counting.
The present invention is achieved through the following technical solutions above-mentioned purpose:
Filtering shaping circuit for heart rate collection of the present invention comprises the first resistance ~ the 4th resistance, amplifier, first polar capacitor, second polar capacitor, first Schmidt trigger ~ the 3rd Schmidt trigger and DC power supply, the first end of described first resistance is the signal input part of described filtering shaping circuit, second end of described first resistance is connected with the first end of described second resistance and the positive pole of described first polar capacitor respectively, second end of described second resistance is connected with the positive pole of described second polar capacitor and the positive signal input of described amplifier respectively, the negative signal input of described amplifier is connected with the first end of described 3rd resistance and the first end of described 4th resistance respectively, second end of described 4th resistance is connected with the negative pole of described first polar capacitor, the output of described amplifier successively with described first Schmidt trigger, described second Schmidt trigger is connected with described 3rd Schmidt trigger, the output of described 3rd Schmidt trigger is the signal output part of described filtering shaping circuit, the cathode power supply input of described amplifier is connected with the positive pole of described DC power supply, the negative power supply input of described amplifier, the negative pole of described second polar capacitor, described second end of the 3rd resistance and the negative pole of described DC power supply are interconnected.
Particularly, described first Schmidt trigger ~ the 3rd Schmidt trigger is six reverse Schmidt triggers.
Beneficial effect of the present invention is:
The present invention carries out filtering, amplification and shaping by the voltage signal exported heart rate pick-up transducers, the square-wave pulse signal that output can directly be counted by single-chip microcomputer, thus realize the accurate acquisition of heart rate signal, be convenient to the application that various heart rate gathers apparatus after one's own heart rate collector, sphygmomanometer, pulse counting device etc.; This filtering shaping circuit structure is simple, cost is low.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the filtering shaping circuit for heart rate collection of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
Filtering shaping circuit for heart rate collection of the present invention comprises the first resistance R1, second resistance R2, 3rd resistance R3, 4th resistance R4, amplifier A1, first polar capacitor C1, second polar capacitor C2, first Schmidt trigger IC1, second Schmidt trigger IC2, 3rd Schmidt trigger IC3 and DC power supply Vcc, the first end of the first resistance R1 is the signal input part of described filtering shaping circuit, second end of the first resistance R1 is connected with the first end of the second resistance R2 and the positive pole of the first polar capacitor C1 respectively, second end of the second resistance R2 is connected with the positive pole of the second polar capacitor C2 and the positive signal input of amplifier A1 respectively, the negative signal input of amplifier A1 is connected with the first end of the 3rd resistance R3 and the first end of the 4th resistance R4 respectively, second end of the 4th resistance R4 is connected with the negative pole of the first polar capacitor C1, the output of amplifier A1 successively with the first Schmidt trigger IC1, second Schmidt trigger IC2 is connected with the 3rd Schmidt trigger IC3, the output of the 3rd Schmidt trigger IC3 is the signal output part Uo of described filtering shaping circuit, the cathode power supply input of amplifier A1 is connected with the positive pole of DC power supply Vcc, the negative power supply input of amplifier A1, the negative pole of the second polar capacitor C2, second end of the 3rd resistance R3 and the negative pole of DC power supply Vcc are interconnected, first Schmidt trigger IC1, the second Schmidt trigger IC2, the 3rd Schmidt trigger IC3 are six reverse Schmidt trigger HCC40106.
As shown in Figure 1, during application, the first end of the first resistance R1 is also connected with terminals JP1, terminals JP1 has three terminals and signal end, cathode power supply end, negative electricity source, the inners of three terminals is connected with the first end of the first resistance R1, the positive pole of DC power supply Vcc and the negative pole of DC power supply Vcc respectively, and the outer end of three terminals is corresponding with three terminals of heart rate pick-up transducers respectively to be connected.Heart rate pick-up transducers does not illustrate in the drawings, generally adopts pressure sensor.First resistance R1, the second resistance R2, the first polar capacitor C1, the second polar capacitor C2 form filter circuit, amplifier A1 is used for signal and amplifies, first Schmidt trigger IC1, the second Schmidt trigger IC2, the 3rd Schmidt trigger IC3 are used for irregular spike to be shaped as square-wave pulse, and the signal of output directly can be counted by the single-chip microcomputer (not shown) of rear class.
Claims (2)
1. the filtering shaping circuit gathered for heart rate, it is characterized in that: comprise the first resistance ~ the 4th resistance, amplifier, first polar capacitor, second polar capacitor, first Schmidt trigger ~ the 3rd Schmidt trigger and DC power supply, the first end of described first resistance is the signal input part of described filtering shaping circuit, second end of described first resistance is connected with the first end of described second resistance and the positive pole of described first polar capacitor respectively, second end of described second resistance is connected with the positive pole of described second polar capacitor and the positive signal input of described amplifier respectively, the negative signal input of described amplifier is connected with the first end of described 3rd resistance and the first end of described 4th resistance respectively, second end of described 4th resistance is connected with the negative pole of described first polar capacitor, the output of described amplifier successively with described first Schmidt trigger, described second Schmidt trigger is connected with described 3rd Schmidt trigger, the output of described 3rd Schmidt trigger is the signal output part of described filtering shaping circuit, the cathode power supply input of described amplifier is connected with the positive pole of described DC power supply, the negative power supply input of described amplifier, the negative pole of described second polar capacitor, described second end of the 3rd resistance and the negative pole of described DC power supply are interconnected.
2. the filtering shaping circuit gathered for heart rate according to claim 1, is characterized in that: described first Schmidt trigger ~ the 3rd Schmidt trigger is six reverse Schmidt triggers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310572160.9A CN104639120A (en) | 2013-11-15 | 2013-11-15 | Filter shaping circuit for heart rate collection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310572160.9A CN104639120A (en) | 2013-11-15 | 2013-11-15 | Filter shaping circuit for heart rate collection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104639120A true CN104639120A (en) | 2015-05-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310572160.9A Pending CN104639120A (en) | 2013-11-15 | 2013-11-15 | Filter shaping circuit for heart rate collection |
Country Status (1)
| Country | Link |
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| CN (1) | CN104639120A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106725408A (en) * | 2016-12-02 | 2017-05-31 | 重庆软汇科技股份有限公司 | Heart rate method of estimation and device based on adaptive digital filtering |
| CN113080931A (en) * | 2021-03-10 | 2021-07-09 | 杭州澳芯科技有限公司 | BCG-based non-contact respiration monitoring method and system |
-
2013
- 2013-11-15 CN CN201310572160.9A patent/CN104639120A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106725408A (en) * | 2016-12-02 | 2017-05-31 | 重庆软汇科技股份有限公司 | Heart rate method of estimation and device based on adaptive digital filtering |
| CN113080931A (en) * | 2021-03-10 | 2021-07-09 | 杭州澳芯科技有限公司 | BCG-based non-contact respiration monitoring method and system |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150520 |
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| WD01 | Invention patent application deemed withdrawn after publication |