CN100336487C - Device for measuring human body pulse beating times - Google Patents
Device for measuring human body pulse beating times Download PDFInfo
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- CN100336487C CN100336487C CNB2005100353432A CN200510035343A CN100336487C CN 100336487 C CN100336487 C CN 100336487C CN B2005100353432 A CNB2005100353432 A CN B2005100353432A CN 200510035343 A CN200510035343 A CN 200510035343A CN 100336487 C CN100336487 C CN 100336487C
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Abstract
A device for measuring the pulse beating times of a human body comprises an alternating current excitation source (1), a sampling resistor (2), a first electrode (21), a second electrode (22), a signal processing module (3) consisting of a precision wave detector (31), a frequency-selecting amplifier (32) and a voltage comparator (33), a microprocessor (4) and a display (5), wherein the two electrodes are respectively connected with limb parts such as two hands or two feet which are separated from the human body to be measured at a certain distance, the connecting line end of the second electrode (22) is grounded, the connecting line end of the first electrode (21) is divided into two paths, one path is connected with the signal output end of the alternating current excitation source (1) through the sampling resistor (2), and the other path is connected with the signal input end of the signal processing module (3); and the signal output end of the signal processing module (3) is connected with the microprocessor (4). The invention measures the pulsation of the impedance of the tissue in the body, namely, measures the counting value of the one-time pulsatility change of the impedance instead of directly measuring the impedance value, so the device has low cost, high measurement precision and easy popularization.
Description
Technical field
The present invention relates to the measuring device of phase place or pulse characteristic, relate in particular to a kind of measuring device of tissue impedance pulsatile change.
Background technology
Generally speaking, the number of times of pulse and strong and weak and heartbeat number of times, myocardial contraction are consistent.So the counting pulse is promptly represented heart rate, but when arrhythmia (as premature beat, auricular fibrillation etc.), heart rate and pulse can be inconsistent, should count respectively.Pulse Rate all is subject to ectocine and change at any time at infant and Childhood, and the general age is more little, and heart rate is fast more.
Common measurement pulse method is: because the contraction and the expansion of heart make the blood systemic circulation.So just can feel on the skin of table shallow artery top and heart contraction, the synchronous situation of beating of diastole as long as finger is ridden over, Here it is pulse.According to the rhythm and the strong and weak degree of pulse, can understand the active situation of heart.During measurement, can put the forefinger middle finger and the third finger together, ride over lightly on certain position and carry out.
Also can utilize the apparatus measures pulse.Existing method mainly contains: stethoscope method, b12extrocardiography, infra-red method etc., during pulses measure device that technology such as, piezoelectricity infrared when adopting realize, to pick off when measuring installation or fixedly have relatively high expectations, general requirement is placed in obviously place of body surface pulsation, and need secure fixation, otherwise can lose the pulse number.
Patent 01204910.7 discloses a kind of capable of measuring pulse electronic weighbridge.The principle that this patent is announced be by and the contacted two arrays of electrodes of left and right sides foot measure potential difference measurement pulse between bipod.Its major defect is: certain bio electricity potential difference is arranged between human upper limb and lower limb, and the bio electricity potential difference between the bipod and faint, the general circuit method is difficult to measure, and as adopting special circuit, then cost is very high, does not have actual use value.Patent 01204908.5 discloses the electronic weighbridge that a kind of hand held is surveyed pulse, and the shortcoming of this patent is also identical with above patent.
Existing measure the human biological electricity impedance analysis (method of (bioeletrical impedance analysis:BIA method) can record the impedance value of body local, is used to judge the fat and the moisture of human body.As shown in Figure 1, its principle is as follows: an electrode left side 1 and the electrode right side 1 lay respectively at two limbs (bipod or two handss) or the limbs position separated by a distance of human body.An electrode left side 2 and the electrode right side 2 also lay respectively at two limbs (bipod or two handss) or the limbs position separated by a distance of human body.An electrode left side 1 is positioned at the limbs homonymy with the electrode right side 1 and does not link to each other, and electrode left 2 also is positioned at the limbs homonymy with the electrode right side 2 and does not link to each other.Small alternation exciting current feeds human body by an electrode left side 1 and electrode right 1.Produce the bio-electricity induction signal on a body electrode left side 2 and right 2 places of electrode.Can record the bio-electricity induction current potential difference on an electrode left side 2 and the electrode right side 2 by electrical signal of reaction sampling processing circuit.The essence of this method is to measure bio-electricity induction pressure value, and then the volume calculation bio-electrical impedance by tested limbs.But this method just is applied to measure body fat mass in human body content and water content at present, and certainty of measurement very easily is subjected to the influence of individual variation.
Summary of the invention
The technical problem to be solved in the present invention be to provide a kind of certainty of measurement height, cost low measure the method and apparatus of human pulse number with the heart beating pulsatile change based on tissue impedance.
The present invention adopts following technical scheme: design a kind of device of measuring the human pulse number, this device comprises:
Ac-excited source is used to produce a high frequency ac signal that can penetrate tissue and have stabilized amplitude degree and frequency;
The sampling resistor and first electrode and second electrode are used to gather tested person's systemic heart fluctuating signal that caused human body impedance changes of beating;
Signal processing module is used to carry out detection, and frequency-selecting is amplified to isolate the fluctuating signal that tested human body changes because of the caused human body impedance of heartbeat;
Microprocessor with one group of display that the I/0 port is connected of microprocessor, be used to write down and show by the pulsation number of times that caused human body impedance changes of beating of tested person's systemic heart in the unit interval of signal processing module output;
Described first electrode links to each other with tested person's bulk phase limbs position at a certain distance respectively with second electrode, the line end ground connection of second electrode, the line end of first electrode is divided into two-way, one the tunnel connects the signal output part in ac-excited source through sampling resistor, and another road is connected with the signal input part of signal processing module; The signal output part of described signal processing module connects a counting port of microprocessor.
Described signal processing module comprises accurate cymoscope, frequency-selective amplifier and the voltage comparator of the unidirectional connection of order, and the signal input part of described accurate cymoscope connects the line end of first electrode, and the signal output part of described voltage comparator connects microprocessor.
Compare with prior art, the method and apparatus of measurement human pulse number of the present invention has following advantage:
(1) pulsation by the impedance of measuring body inner tissue is not directly to measure resistance value, promptly measuring corresponding blood pulses once causes the impedance of tissue that the count value of a pulsating nature variation takes place, the resistance value size of it and tissue is irrelevant, only relevant with the number of times of change in impedance value, so there is not the problem of measuring the impedance precision, be not subjected to the influence of measured's individual variation, the certainty of measurement height;
(2) installation cost of the present invention is lower, is easy to promote;
(3) measuring method is simple, and the measured only need contact two measurement electrode, stands or two electrodes of both hands gripping and stable a moment as both feet, and circuit can be measured measured's pulse.
Description of drawings
Fig. 1 is the schematic diagram of existing measurement human-body biological electrical impedance device;
Fig. 2 is the schematic diagram of the device of measurement human pulse number of the present invention.
The specific embodiment
Be described in further detail below in conjunction with the most preferred embodiment shown in the accompanying drawing.
Fig. 2 is an embodiment of the present invention's device of measuring the human pulse number, and this device comprises:
Ac-excited source 1 is used to produce a high frequency ac signal that can penetrate tissue and have stabilized amplitude degree and frequency, and its frequency range is that 1000 hertz to 100000 hertz, amplitude range are 0.5 volt to 5.0 volts;
The sampling resistor 2 and first electrode 21 and second electrode 22 are used to gather tested person's systemic heart fluctuating signal that caused human body impedance changes of beating;
Signal processing module 3, be used to carry out detection, frequency-selecting is amplified to isolate the fluctuating signal that tested human body changes because of the caused human body impedance of heartbeat, and described signal processing module 3 comprises accurate cymoscope 31, frequency-selective amplifier 32 and the voltage comparator 33 of the unidirectional connection of order;
Microprocessor 4 and the LCD display 5 and the keyboard 6 that are connected with two groups of I/O ports of microprocessor 4 respectively; Described microprocessor 4 is used to write down and shows that described keyboard is used for the input operation instruction and realizes the human computer conversation by beat pulsation number of times that caused human body impedance changes and by LCD display 5 outputs of tested person's systemic heart in the unit interval of signal processing module 3 outputs;
Described first electrode 21 links to each other with tested person's bulk phase limbs position at a certain distance respectively with second electrode 22, two foots or two hands as tested human body, the line end ground connection of second electrode 22, the line end of first electrode 21 is divided into two-way, one the tunnel connects the signal output part in ac-excited source 1 through sampling resistor 2, and the input of the accurate cymoscope 31 in another road and the signal processing module 3 is connected; The outfan of the voltage comparator 33 in the described signal processing module 3 connects a counting port of microprocessor 4.
The method that the present invention of application said apparatus measures the human pulse number comprises the steps:
A. produce the high frequency ac signal that can penetrate tissue and have stabilized amplitude degree and frequency by ac-excited source, the frequency range of this high frequency ac signal is in 1000 hertz to 100000 hertz, the amplitude scope at 0.5 volt to 5.0 volts;
B. a pair of measurement electrode is contacted with tested person's bulk phase limbs position at a certain distance respectively, as contacting with two foots or two hands of tested human body respectively, produce at the first electrode place of measurement electrode with human heart and beat and fluctuating signal that the human body impedance that causes changes, this fluctuating signal has reacted beating of human heart, on the high frequency ac signal of this fluctuating signal attached to described ac-excited source generation;
C. the described mixing ripple signal that is superimposed with high frequency ac signal and human body impedance fluctuating signal is admitted in the signal processing module, carry out detection by the accurate cymoscope 31 in the signal processing module 3, frequency-selective amplifier 32 and 33 pairs of described mixing ripple signals of voltage comparator, frequency-selecting is amplified, and isolates the fluctuating signal of tested human body impedance variation at last;
D. thereby microprocessor 4 receives the fluctuating signal of the tested human body impedance variation of being exported by signal processing module 3 and counts the number of times that obtains tested human body per minute beat pulse, and count results send LCD display 5 to show.
When measuring, also can be by keyboard 6 input operations instruction and the realization human computer conversation who is connected with another I/O port of microprocessor, as import the higher limit and the lower limit of unit interval beat pulse number of times, when testing result exceeds the scope of above-mentioned limit value, can give the alarm by an alarm that is connected with microprocessor.
Claims (5)
1, a kind of device of measuring the human pulse number comprises:
Ac-excited source (1) is used to produce a high frequency ac signal that can penetrate tissue and have stabilized amplitude degree and frequency;
Sampling resistor (2) and first electrode (21) and second electrode (22) are used to gather tested person's systemic heart fluctuating signal that caused human body impedance changes of beating;
Signal processing module (3) is used to carry out detection, and frequency-selecting is amplified to isolate the fluctuating signal that tested human body changes because of the caused human body impedance of heartbeat;
Microprocessor (4) and the display (5) that is connected with one group of input/output end port of microprocessor (4) are used for record and show by the pulsation number of times that caused human body impedance changes of beating of tested person's systemic heart in the unit interval of signal processing module (3) output;
Described first electrode (21) links to each other with tested person's bulk phase limbs position at a certain distance respectively with second electrode (22), the line end ground connection of second electrode (22), the line end of first electrode (21) is divided into two-way, one the tunnel connects the signal output part of ac-excited source (1) through sampling resistor (2), and another road is connected with the signal input part of signal processing module (3); The signal output part of described signal processing module (3) connects a counting port of microprocessor (4).
2, the device of measurement human pulse number according to claim 1 is characterized in that: also comprise the keyboard (6) that links to each other with another group input/output end port of described microprocessor (4), be used for the input operation instruction and realize the human computer conversation.
3, the device of measurement human pulse number according to claim 1, it is characterized in that: described signal processing module (3) comprises accurate cymoscope (31), frequency-selective amplifier (32) and the voltage comparator (33) of the unidirectional connection of order, the signal input part of described accurate cymoscope (31) connects the line end of first electrode (21), and the signal output part of described voltage comparator (33) connects microprocessor (4).
4, the device of measurement human pulse number according to claim 1 is characterized in that: it is that 1000 hertz to 100000 hertz, amplitude are 0.5 to 5.0 volt AC signal that described ac-excited source (1) produces frequency.
5, the device of measurement human pulse number according to claim 1 is characterized in that: described first electrode (21) and second electrode (22) contact with two foots or two hands of tested human body respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100353432A CN100336487C (en) | 2005-06-14 | 2005-06-14 | Device for measuring human body pulse beating times |
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| CNB2005100353432A CN100336487C (en) | 2005-06-14 | 2005-06-14 | Device for measuring human body pulse beating times |
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| CN1692878A CN1692878A (en) | 2005-11-09 |
| CN100336487C true CN100336487C (en) | 2007-09-12 |
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| CNB2005100353432A Expired - Fee Related CN100336487C (en) | 2005-06-14 | 2005-06-14 | Device for measuring human body pulse beating times |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104771806B (en) * | 2015-05-12 | 2018-01-16 | 中国人民解放军第三军医大学第二附属医院 | Infusion pump multi-parameter signals harvester and method based on impedance variations |
| CN105852839B (en) * | 2016-03-23 | 2018-11-02 | 中山大学 | A kind of method for measuring heart rate and device based on bio-electrical impedance technology |
| CN109662702A (en) * | 2018-05-23 | 2019-04-23 | 李芝宏 | Condenser type pulse detection system and method |
Citations (7)
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|---|---|---|---|---|
| EP1057498A2 (en) * | 1999-05-31 | 2000-12-06 | Laerdal Medical AS | System and method for measuring blood flow during defibrillation |
| GB2367896A (en) * | 2000-06-05 | 2002-04-17 | Seven Of Nine Ltd | Heart rate monitor |
| CN1391450A (en) * | 1999-11-19 | 2003-01-15 | 欧姆龙株式会社 | Bioelectric signal detector and massage machine |
| US6694182B1 (en) * | 1999-12-07 | 2004-02-17 | Ya-Man Ltd. | Wearable calorie calculator |
| US6714814B2 (en) * | 2000-03-30 | 2004-03-30 | Tanita Corporation | Bioelectrical impedance measuring apparatus |
| US6821254B2 (en) * | 2000-07-21 | 2004-11-23 | Institute Of Critical Care Medicine | Cardiac/respiratory arrest detector |
| US20050004483A1 (en) * | 2003-07-03 | 2005-01-06 | Chang Yow Industry Co., Ltd. | Bi-point detection type heart-rate monitor and its heart-rate monitoring method |
-
2005
- 2005-06-14 CN CNB2005100353432A patent/CN100336487C/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1057498A2 (en) * | 1999-05-31 | 2000-12-06 | Laerdal Medical AS | System and method for measuring blood flow during defibrillation |
| CN1391450A (en) * | 1999-11-19 | 2003-01-15 | 欧姆龙株式会社 | Bioelectric signal detector and massage machine |
| US6694182B1 (en) * | 1999-12-07 | 2004-02-17 | Ya-Man Ltd. | Wearable calorie calculator |
| US6714814B2 (en) * | 2000-03-30 | 2004-03-30 | Tanita Corporation | Bioelectrical impedance measuring apparatus |
| GB2367896A (en) * | 2000-06-05 | 2002-04-17 | Seven Of Nine Ltd | Heart rate monitor |
| US6821254B2 (en) * | 2000-07-21 | 2004-11-23 | Institute Of Critical Care Medicine | Cardiac/respiratory arrest detector |
| US20050004483A1 (en) * | 2003-07-03 | 2005-01-06 | Chang Yow Industry Co., Ltd. | Bi-point detection type heart-rate monitor and its heart-rate monitoring method |
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| CN1692878A (en) | 2005-11-09 |
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Assignee: Shenzhen Healthcare Electronic Technology Co., Ltd. Assignor: Shenzhen Institute of Stinghua University Contract record no.: 2010440020158 Denomination of invention: Method and device for detecting pulse number of human body Granted publication date: 20070912 License type: Exclusive License Open date: 20051109 Record date: 20100907 |
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Granted publication date: 20070912 Termination date: 20200614 |