CN202654129U - Impedance measuring equipment for human bodies - Google Patents

Impedance measuring equipment for human bodies Download PDF

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CN202654129U
CN202654129U CN 201220304282 CN201220304282U CN202654129U CN 202654129 U CN202654129 U CN 202654129U CN 201220304282 CN201220304282 CN 201220304282 CN 201220304282 U CN201220304282 U CN 201220304282U CN 202654129 U CN202654129 U CN 202654129U
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fixed electrode
voltage
exciting current
human body
measuring equipment
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王萍
李利明
何彩花
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BEIJING SHHC TECHNOLOGY Co Ltd
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BEIJING SHHC TECHNOLOGY Co Ltd
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Abstract

The utility model provides impedance measuring equipment for human bodies. The impedance measuring equipment comprises a processor, and at least two non-fixed electrode pairs, a first fixed electrode pair, a second fixed electrode pair, a third fixed electrode pair and a fourth fixed electrode pair which are connected with the processor. According to the scheme, the impedance of trunks is obtained by a mode of combining the non-fixed electrodes and the fixed electrodes, so that the accuracy of the impedance measurement of the human bodies is improved.

Description

A kind of human body impedance measuring equipment
Technical field
This utility model relates to the biological impedance technical field, refers to especially a kind of human body impedance measuring equipment.
Background technology
Bio-electrical impedance bioelectrical impedance analysis (Bioelectrical Impedance Analysis, BIA) being a measuring body composition technology that grows up nearly decades, is a kind of electrical characteristics of utilizing biological tissue's organ and Changing Pattern extraction thereof and the detection technique of Human Physiology, biomedical information that pathological condition is relevant.It is according to human fatty tissue (FM) and the different electrical impedance characteristics of non-fat tissue (FFM), send into a small AC measurment electric current by means of the electrode that is placed on body surface to tested human body, extract human body impedance information from detecting electrode, carry out the mensuration of tissue ingredient of human body tissue ingredient.BIA whole body measurement method the earliest is approximately one section cylinder with human body and measures, because the contribution of extremity part is very large in the BIA whole body method measurement result, covered the torso portion useful information, and in measuring body composition, the composition information of torso portion is often even more important, have more clinical value, so on the basis of whole body measurement method, develop, formed segment impedance measuring method (SBIA).SBIA is divided into five sections with human body, i.e. left upper extremity, left lower extremity, right upper extremity, right lower extremity and trunk are so be also referred to as five sections methods.Five sections methods have considered that the upper and lower limb of human body, trunk are because volume is different with shape, difference on the impedance measurements impact, can measure preferably the trunk composition, solve to a certain extent that whole body impedance method model is coarse, data are disperseed, ignored the defectives such as material impact of torso portion impedance to human body component.
BIA compares with the whole body method, existing BIA method of fractionation has been considered the different impacts on impedance measurements of human limb and trunk volume and shape, has solved to a certain extent that whole body electrical impedance measuring body composition method model is coarse, the impedance of ignoring torso portion is to defectives such as the material impact of human body component and data dispersions.But still there are the following problems:
Existing BIA method of fractionation is considered as a volume conductor with the torso portion of human body, thinks that the interior Fat Distribution of whole trunk is uniform.But clinically, abdominal obesity divides subcutaneous fat accumulation type (being called for short subcutaneous obese type) and interior fat accumulation type (being called for short the internal organs obese type) two large classes.Subcutaneous fat accumulation type characteristics are that main the concentrating of fat is distributed in abdominal part, buttocks and the huckle subcutaneous tissue; The internal organs obese type then is the main peritoneum (comprising omentum majus, omentum minus, mesentery) of concentrating in the distribution abdominal cavity of fat.Internal organs obese type overweight people blood cholesterol obviously raises, and after taking glucose, the speed that blood glucose descends is slower than the normal person significantly.The easier trouble hypertension of this type overweight people, arteriosclerosis and diabetes.Therefore, measure overweight people's Fat Distribution situation, more can reflect fat harm.Usually male's fattiness concentrates on abdominal part, and the women then focuses mostly on subcutaneous.Ratio such as stomach fat is large, then easily suffers from and states disease.So no matter be that subcutaneous fat accumulation type or interior fat accumulation type are fat, its a large amount of athero all is lower torso (being abdominal part, buttocks and thigh).Therefore, in the bioelectrical impedance analysis, the importance that can distinguish the fat content of breast, abdominal part is apparent.
The utility model content
The technical problems to be solved in the utility model provides a kind of human body impedance measuring equipment, by the mode of on-fixed electrode and fixed electrode combination, obtains the impedance of trunk part, has improved the accuracy of human body impedance measuring.
For solving the problems of the technologies described above, embodiment of the present utility model provides a kind of human body impedance measuring equipment, comprising:
Processor, at least two pairs of on-fixed electrode pairs that are connected with described processor, the first fixed electrode to, the second fixed electrode to, the 3rd fixed electrode to and the 4th fixed electrode pair.
Wherein, the first on-fixed electrode pair in described at least two on-fixed electrode pairs comprises: the first voltage sample on-fixed electrode and the first exciting current on-fixed electrode;
The second on-fixed electrode pair in described at least two on-fixed electrode pairs comprises: second voltage sampling on-fixed electrode and the second exciting current on-fixed electrode;
Described the first fixed electrode is to comprising: the first voltage sample fixed electrode and the first exciting current fixed electrode;
Described the second fixed electrode is to comprising: second voltage sampling fixed electrode and the second exciting current fixed electrode;
Described the 3rd fixed electrode is to comprising: tertiary voltage sampling fixed electrode and the 3rd exciting current fixed electrode;
Described the 4th fixed electrode is to comprising: the 4th voltage sample fixed electrode and the 4th exciting current fixed electrode.
Wherein, described the first voltage sample on-fixed electrode, described second voltage sampling on-fixed electrode, described the first voltage sample fixed electrode, described second voltage sampling fixed electrode, described tertiary voltage sampling fixed electrode and the 4th voltage sample fixed electrode of being connected all are connected with a plurality of voltages gauge tap, described plurality of voltages gauge tap is connected with a voltage signal converter section and is connected with described processor, and described voltage signal converter section is connected with described processor;
Described the first exciting current on-fixed electrode, described the second exciting current on-fixed electrode, described the first exciting current fixed electrode, described the second exciting current fixed electrode, described the 3rd exciting current fixed electrode and the 4th exciting current fixed electrode of being connected all are connected with a Multi-path electricity flow control switch, described Multi-path electricity flow control switch is connected with a current signal converter section and is connected with described processor, and described current signal converter section is connected with described processor.
Wherein, described Multi-path electricity flow control switch and described plurality of voltages gauge tap include a control end, input and outfan, wherein said control end is connected with described processor, the input of described Multi-path electricity flow control switch is connected with described current signal converter section, the outfan of described Multi-path electricity flow control switch and described the first exciting current on-fixed electrode, described the second exciting current on-fixed electrode, described the first exciting current fixed electrode, described the second exciting current fixed electrode, described the 3rd exciting current fixed electrode and one or more connection of being connected in the 4th exciting current fixed electrode; The input of described plurality of voltages gauge tap and described the first voltage sample on-fixed electrode, described second voltage sampling on-fixed electrode, described the first voltage sample fixed electrode, described second voltage sampling fixed electrode, described tertiary voltage sampling fixed electrode and in the 4th voltage sample fixed electrode one or more of being connected are connected, and the outfan of described plurality of voltages gauge tap is connected with described voltage signal converter section.
Wherein, described voltage signal converter section comprises: the voltage signal conditioner that is connected with described plurality of voltages gauge tap, and the voltage signal A/D converter that is connected with described voltage signal conditioner, described voltage signal A/D converter is connected with described processor;
Described current signal converter section comprises: the current signal regulator that is connected with described Multi-path electricity flow control switch, and the current signal generator that is connected with described current signal regulator, described current signal generator is connected with described processor.
Wherein, described voltage signal conditioner comprises: a voltage signal amplifier and the voltage signal wave filter that is connected with described voltage signal amplifier.
Wherein, described the first on-fixed electrode pair, described the second on-fixed electrode pair, described the first fixed electrode to, described the second fixed electrode to, described the 3rd fixed electrode to and wantonly 1 end that also connects a measuring resistance of described the 4th fixed electrode centering, the other end ground connection of described measuring resistance.
Wherein, described processor also is connected with host computer by one 232 level signal change-over circuits.
Wherein, described 232 level signal change-over circuits are connected with described host computer by a serial ports.
Wherein, the said equipment also comprises: be the power supply of whole power devices.
The beneficial effect of technique scheme of the present utility model is as follows:
In the such scheme, adopt fixed electrode and on-fixed electrode in conjunction with detection, and the information of finishing detects and the analysis and calculation of data, can obtain 6 parts such as upper limb, lower limb, chest (trunk epimere), abdominal part (trunk hypomere), left side of trunk and right side of trunk and whole impedance data, it is more accurate to measure.
Description of drawings
Fig. 1 is the structured flowchart of human body impedance measuring equipment of the present utility model;
Fig. 2 is human body impedance schematic equivalent circuit of the present utility model;
Fig. 3 is a specific implementation structure chart of human body impedance measuring equipment of the present utility model;
Fig. 4 is a specific implementation structure chart of human body impedance measuring equipment of the present utility model;
Fig. 5 is the specific implementation structure chart of human body impedance measuring equipment of the present utility model when a certain section human body impedance of concrete acquisition;
Fig. 6 is human body impedance measuring equipment another specific implementation structure chart when a certain section human body impedance of concrete acquisition of utility model;
Fig. 7 is the Multi-path electricity flow control switch of human body impedance measuring equipment of utility model or the structural representation of plurality of voltages gauge tap.
The specific embodiment
For making the technical problems to be solved in the utility model, technical scheme and advantage clearer, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
As shown in Figure 1, embodiment of the present utility model also provides a kind of human body impedance measuring equipment, comprising:
Processor, at least two on-fixed electrode pairs that are connected with described processor, the first fixed electrode to, the second fixed electrode to, the 3rd fixed electrode to and the 4th fixed electrode pair; Wherein, the second on-fixed electrode pair in the first on-fixed electrode pair in described at least two on-fixed electrode pairs, described at least two the on-fixed electrode pairs, described the first fixed electrode to, described the second fixed electrode to, described the 3rd fixed electrode to and the exciting current signal that applies by processor of described the 4th fixed electrode, and with the voltage signal that records, input to processor, processor is according to these voltage signals and current signal obtains and the impedance of the trunk of these electrode pair relevant positions.Thereby realized to obtain the impedance of trunk part, improved the accuracy to the testing result of human body impedance.
The use procedure of the said equipment is described below in conjunction with Fig. 2: at least two measuring points in the first measuring point of trunk, the second measuring point, the 3rd measuring point and the 4th measuring point form a tetragon loop by described trunk; Such as the E(e among Fig. 2), F(f), G(g), at least two loops that form by trunk in H(h); Wherein, among this embodiment of the present utility model, be when measuring for the first time, the first measuring point is E(e) the residing position of electrode pair, and the second measuring point is F(f) the residing position of electrode pair; The 3rd measuring point is G(g when measuring for the second time) the residing position of electrode pair, the 4th measuring point is H(h) the residing position of electrode pair; Here, G(g) electrode pair and E(e) electrode pair is an on-fixed electrode pair, H(h) electrode pair and F(f at entity) electrode pair may be an on-fixed electrode pair on entity; That is to say, among this embodiment, be with two on-fixed electrode pairs, and when this was measured, optional first, second and third measured with two measuring points in four, and select two other measuring point to measure when measuring next time again; Certainly, among the embodiment of the present utility model, being not limited to is two on-fixed electrode pairs, also can be three on-fixed electrode pairs, wherein, an on-fixed electrode pair is on-fixed electrode pair for subsequent use, if two other on-fixed electrode pair damages or during fault, can enable this on-fixed electrode pair for subsequent use; Among certain embodiment of the present utility model, also can be designed to four on-fixed electrode pairs, during use, can choose wherein two on-fixed electrode pairs wantonly measures, certainly, also can adopt simultaneously four on-fixed electrode pairs to measure, also can obtain and adopt two effects that the on-fixed electrode pair is identical;
If the impedance between the first measuring point and the second measuring point is R2, impedance between the first measuring point and the 3rd measuring point is R4, impedance between the second measuring point and the 3rd measuring point is R5, and the impedance between the 3rd measuring point and the 4th measuring point is R6; Above-mentioned processor can obtain above-mentioned R2 according to following formula, R4, R5 and R6 after obtaining any voltage between the two of above-mentioned the first measuring point, the second measuring point, the 3rd measuring point and the 4th measuring point; Wherein, formula is as follows:
R 2 × ( R 4 + R 5 + R 6 ) R 2 + ( R 4 + R 5 + R 6 ) = U EF / I R 4 × ( R 2 + R 5 + R 6 ) R 4 + ( R 2 + R 5 + R 6 ) = U EG / I ( R 4 + R 6 ) × ( R 2 + R 5 ) ( R 4 + R 6 ) + ( R 2 + R 5 ) = U EH / I ( R 2 + R 4 ) × ( R 5 + R 6 ) ( R 2 + R 4 ) + ( R 5 + R 6 ) = U FG / I R 5 × ( R 2 + R 4 + R 6 ) R 5 + ( R 2 + R 4 + R 6 ) = U FH / I R 6 × ( R 4 + R 2 + R 5 ) R 6 + ( R 4 + R 2 + R 5 ) = U GH / I
Wherein, U EFBe described the first magnitude of voltage, U EGBe described second voltage value, U EHBe described tertiary voltage value, U FGBe described the 4th magnitude of voltage, U FHBe described the 5th magnitude of voltage, U GHBe described the 6th magnitude of voltage, I is described current value, R 2Be described the first resistance value, R 4Be described the second resistance value, R 5Be described the 3rd resistance value, R 6Be described the 4th resistance value.
Described the first magnitude of voltage is the poor of described the first measuring voltage value (the on-fixed electrode pair is in the sample voltage value of the first measuring point) and described the second measuring voltage value (the on-fixed electrode pair is in the sample voltage value of the second measuring point);
Described second voltage value is the poor of described the first measuring voltage value and described the 3rd measuring voltage value (the on-fixed electrode pair is in the sample voltage value of the 3rd measuring point);
Described tertiary voltage value is the poor of described the first measuring voltage value and described the 4th measuring voltage value (the on-fixed electrode pair is in the sample voltage value of the 4th measuring point);
Described the 4th magnitude of voltage is the poor of described the second measuring voltage value and described the 3rd measuring voltage value;
Described the 5th magnitude of voltage is the poor of described the second measuring voltage value and described the 4th measuring voltage value;
Described the 6th magnitude of voltage is the poor of described the 3rd measuring voltage value and described the 4th measuring voltage value.
Further, processor can also according to the first fixed electrode that is in the human body left upper extremity to the 5th measuring voltage value that records, be in the human body right upper extremity the second fixed electrode to the 6th measuring voltage value that records, be in the human body left lower extremity the 3rd fixed electrode to the 7th measuring voltage value that records, eight measuring voltage value and the described current value of the 4th fixed electrode to recording that is in the human body right lower extremity, obtain the 7th resistance value of the 6th resistance value of the 5th resistance value of described left upper extremity, described right upper extremity, described left lower extremity and the 8th resistance value of described right lower extremity.
Wherein, according to formula:
R 1 + R 2 × ( R 4 + R 5 + R 6 ) R 2 + ( R 4 + R 5 + R 6 ) + R 3 = U AB / I R 1 + R 4 × ( R 2 + R 5 + R 6 ) R 4 + ( R 2 + R 5 + R 6 ) + R 7 = U AC / I R 1 + ( R 4 + R 6 ) × ( R 2 + R 5 ) ( R 4 + R 6 ) + ( R 2 + R 4 ) + R 8 = U AD / I R 3 + ( R 2 + R 4 ) × ( R 5 + R 6 ) ( R 2 + R 4 ) + ( R 5 + R 6 ) + R 7 = U BC / I R 3 + R 5 × ( R 2 + R 4 + R 6 ) R 5 + ( R 2 + R 4 + R 6 ) + R 8 = U BD / I R 7 + R 6 × ( R 4 + R 2 + R 5 ) R 6 + ( R 4 + R 2 + R 5 ) + R 8 = U CD / I
Obtain described the 5th resistance value, described the 6th resistance value, described the 7th resistance value and described the 8th resistance value; Wherein, U ABBe the 7th magnitude of voltage, U ACBe the 8th magnitude of voltage, U ADBe the 9th magnitude of voltage, U BCBe the tenth magnitude of voltage, U BDBe the 11 magnitude of voltage, U CDBe the 12 magnitude of voltage, I is described current value, R 1Be described the 5th resistance value of described left upper extremity, R 3Be described the 6th resistance value of described right upper extremity, R 7Be described the 7th resistance value of described left lower extremity, R 8Described the 8th resistance value for described right lower extremity;
Described the 7th magnitude of voltage is the poor of described the 5th measuring voltage value and described the 6th measuring voltage value;
Described the 8th magnitude of voltage is the poor of described the 5th measuring voltage value and described the 7th measuring voltage value;
Described the 9th magnitude of voltage is the poor of described the 5th measuring voltage value and described the 8th measuring voltage value;
Described the tenth magnitude of voltage is the poor of described the 6th measuring voltage value and described the 7th measuring voltage value;
Described the 11 magnitude of voltage is the poor of described the 6th measuring voltage value and described the 8th measuring voltage value;
Described the 12 magnitude of voltage is the poor of described the 7th measuring voltage value and described the 8th measuring voltage value.
In addition, in another embodiment of the present utility model, can also adopt the first on-fixed electrode pair and the second on-fixed electrode pair directly to measure, obtain the impedance of left upper extremity, right upper extremity, left lower extremity and the right lower extremity of human body, specific as follows:
According to described the 5th measuring voltage value and described the first measuring voltage value, obtain the 13 magnitude of voltage;
According to described the 6th measuring voltage value and described the second measuring voltage value, obtain the 14 magnitude of voltage;
According to described the 7th measuring voltage value and described the 3rd measuring voltage value, obtain the 15 magnitude of voltage;
According to described the 8th measuring voltage value and described the 4th measuring voltage value, obtain the 16 magnitude of voltage;
According to described the 13 magnitude of voltage and described current value, directly obtain described the 5th resistance value of described left upper extremity;
According to described the 14 magnitude of voltage and described current value, directly obtain described the 6th resistance value of described right upper extremity;
According to described the 15 magnitude of voltage and described current value, directly obtain described the 7th resistance value of described left lower extremity;
According to described the 16 magnitude of voltage and described current value, directly obtain described the 8th resistance value of described right lower extremity.
In another embodiment of the present utility model, again as shown in figs. 1 and 3, in this human body impedance measuring equipment, the first on-fixed electrode pair 11 in described at least two on-fixed electrode pairs comprises: the first voltage sample on-fixed electrode (such as electrode E) and the first exciting current on-fixed electrode (such as electrode e);
The second on-fixed electrode pair 12 in described at least two on-fixed electrode pairs comprises: second voltage sampling on-fixed electrode (such as electrode F) and the second exciting current on-fixed electrode (such as electrode f);
Described the first fixed electrode comprises 15: the first voltage sample fixed electrode (such as electrode A) and the first exciting current fixed electrode are (such as electrode a);
Described the second fixed electrode comprises 16: second voltage sampling fixed electrode (such as electrode B) and the second exciting current fixed electrode (such as electrode b);
Described the 3rd fixed electrode comprises 17: tertiary voltage sampling fixed electrode (such as electrode C) and the 3rd exciting current fixed electrode (such as electrode c);
Described the 4th fixed electrode comprises 18: the 4th voltage sample fixed electrode (such as electrode D) and the 4th exciting current fixed electrode (such as electrode d);
Described the first voltage sample on-fixed electrode, described second voltage sampling on-fixed electrode, described the first voltage sample fixed electrode, described second voltage sampling fixed electrode, described tertiary voltage sampling fixed electrode and the 4th voltage sample fixed electrode of being connected all are connected with a plurality of voltages gauge tap 19, described plurality of voltages gauge tap 19 is connected with a voltage signal converter section 20 and is connected with described processor 10, and described voltage signal converter section 20 is connected with described processor 10;
Described the first exciting current on-fixed electrode, described the second exciting current on-fixed electrode, described the first exciting current fixed electrode, described the second exciting current fixed electrode, described the 3rd exciting current fixed electrode and the 4th exciting current fixed electrode of being connected all are connected with a Multi-path electricity flow control switch 22, described Multi-path electricity flow control switch 22 is connected with a current signal converter section 21 and is connected with described processor 10, and described current signal converter section 21 is connected with described processor 10.
Described Multi-path electricity flow control switch 22 and described plurality of voltages gauge tap 19 include a control end 51, input 52 and outfan 53(are as shown in Figure 7), wherein said control end 53 is connected (as shown in Figure 3) with described processor 10, the input 52 of described Multi-path electricity flow control switch is connected with current signal converter section 21, the outfan of described Multi-path electricity flow control switch 22 and described the first exciting current on-fixed electrode, described the second exciting current on-fixed electrode, described the first exciting current fixed electrode, described the second exciting current fixed electrode, described the 3rd exciting current fixed electrode and one or more connection of being connected in the 4th exciting current fixed electrode;
The input of described plurality of voltages gauge tap 19 and described the first voltage sample on-fixed electrode, described second voltage sampling on-fixed electrode, described the first voltage sample fixed electrode, described second voltage sampling fixed electrode, described tertiary voltage sampling fixed electrode and in the 4th voltage sample fixed electrode one or more of being connected are connected, and the outfan 53 of described plurality of voltages gauge tap 19 is connected with described voltage signal converter section 20.
Specifically, microprocessor 10 control current signal converter sections 21 produce certain exciting current signal (can be the exciting current signal of high frequency, also can be the exciting current signal of low frequency) frequently; Certain exciting current signal frequently passes through Multi-path electricity flow control switch 22 selected inputs to exciting current electrode a, b, c, d, e, f, g, any among the h or a plurality of, thus form corresponding loop by human body, with electrode a, b, c, d, e, f, g, the corresponding voltage sample electrode A of h, B, C, D, E, F, G, the H place obtains corresponding measuring voltage value, and this measuring voltage value inputs to voltage signal converter section 20 by the control of plurality of voltages gauge tap 19, by this voltage signal converter section measuring voltage is carried out corresponding conversion process, input to microprocessor 10, in microprocessor 10, process by body impedance measurement devices, thereby obtain the impedance of trunk and/or the impedance of extremity.
Wherein, as shown in Figure 4, described voltage signal converter section 20 comprises: the voltage signal conditioner 201 that is connected with described plurality of voltages gauge tap 19, and the voltage signal A/D converter 202 that is connected with described voltage signal conditioner 201, described voltage signal A/D converter 202 is connected with described processor 10; Wherein, this voltage signal conditioner 201 specifically can comprise a voltage amplifier and the voltage filter that is connected with this voltage amplifier; The filtered measuring voltage value of 202 pairs of voltage filters of voltage signal A/D converter is changed, and obtains being fit to the digital voltage signal that processor is processed, thereby obtain corresponding human body impedance in microprocessor.
Wherein, described current signal converter section 21 comprises: the current signal regulator 211 that is connected with described Multi-path electricity flow control switch 22, and the current signal generator 212 that is connected with described current signal regulator 211, described current signal generator 212 is connected with described processor 10.
Described current signal generator 212 is under the control of microprocessor 10, produce the exciting current signal, this exciting current signal may have unsettled situation, after 211 stabilized treatment of current signal regulator, inputs to corresponding exciting current electrode by Multi-path electricity flow control switch 22;
Described current signal converter section 21 comprises: the current signal regulator 211 that is connected with described Multi-path electricity flow control switch 22, and the current signal generator 212 that is connected with described current signal regulator, described current signal generator 212 is connected with described processor 10.
Wherein, above-mentioned plurality of voltages gauge tap 19 is the measurement voltage signal that obtain corresponding voltage sample electrode under the control of processor 10; Multi-path electricity flow control switch 22 also is the exciting current signal to be inputed to corresponding exciting current electrode under the control of processor 10.
Further, among the above-mentioned embodiment shown in Figure 4, described the first on-fixed electrode pair 11, described the second on-fixed electrode pair 12, described the first fixed electrode to 15, described the second fixed electrode to 16, described the 3rd fixed electrode to 17 and described the 4th fixed electrode to wantonly 1 end that also connects a measuring resistance 23 in 18, the other end ground connection of described measuring resistance 23.
The effect of this measuring resistance 23 is, avoids not producing in the situation of short circuit, and the magnitude of voltage that obtains between any two measuring points of human body (is above-mentioned U EF, U EG, U EH, U FG, U FH, U GH, U AB, U AC, U AD, U BC, U BD, U CD) time, specifically can be by obtaining such as Fig. 5 or method shown in Figure 6, with U EGBe example, as shown in Figure 5, when loading low-frequency excitation current signal I, at G, the g electrode pair connects a measuring resistance, the other end ground connection of this measuring resistance, and like this for avoiding the human body short circuit, at first the voltage sample on-fixed electrode by the E place obtains voltage U i, the voltage sample on-fixed electrode by the G place obtains voltage U again SWith U i-U SObtain U Z, i.e. U EGR4 is the bio-impedance of the left side trunk of trunk part among this figure, and is consistent with the R4 among Fig. 2.
As shown in Figure 6, when loading the high frequency pumping electric current, be with the difference of Fig. 5 that the bio-impedance R4 of left side trunk expresses with the loop that the resistance R i of mutually series connection and Re and capacitor C m consist of;
Human tissue cell comprises intracellular fluid, extracellular fluid and cell membrane, when the high frequency pumping current signal is inputted, can adopt resistance and electric capacity three element bio-impedance model to represent biological tissue of human body.Cell membrane equivalent capacity Cm is with in parallel with extracellular fluid equivalent resistance Re again after intracellular fluid equivalent resistance Ri connects.The high frequency pumping electric current is passed into measurement model, detect Z X, R S(Z X+ R S) both end voltage, be U by the voltage after amplifying in proportion Z, U SAnd U iBy circuit theory U as can be known Z, U SAnd U iBetween relation satisfy parallelogram law, establish and pass through Z XAnd R SElectric current I, then:
Figure BDA00001811271400111
In the formula | U Z|, | U S| be respectively U ZAnd U SAmplitude or virtual value, θ is U ZAnd U RBetween phase contrast.
Z then XThe amplitude of impedance is: | Z X | = | U Z | | U S | · R S = | U i - U S | | U S | · R S
Certainly, among the embodiment of the present utility model, if do not produce in the situation of short circuit, also can not need measuring resistance, obtain magnitude of voltage between certain two measuring point according to above-mentioned without the method described in the embodiment of measuring resistance.
Certainly, in this apparatus embodiments of the present utility model, also include power supply, be used to whole power devices; In this apparatus embodiments, can also further be connected with host computer PC (computer), specifically can be connected with host computer by one 232 level signal change-over circuits 24, described 232 level signal change-over circuits 24 are connected with described host computer 25 by a serial ports.Thereby the measurement result of the human body impedance that obtains is sent to host computer, thereby can carry out next step analysis.
Above-described embodiment of the present utility model is equally by adopting fixed electrode and on-fixed electrode in conjunction with detection, and the information of finishing detects and the analysis and calculation of data, can obtain 6 parts such as upper limb, lower limb, chest (trunk epimere), abdominal part (trunk hypomere), left side of trunk and right side of trunk and whole impedance data, it is more accurate to measure.
To sum up, equipment of the present utility model is for the problem of present whole body impedance measurement method and the existence of segment impedance measurement method, adopt secure bond on-fixed test point pattern to add the network analytical method torso section of human body is carried out the distribution of impedance decomposition, tentatively set up trunk segmentation multistage bioelectrical impedance analysis model, can distinguish torso section upper and lower resistance value, by the externally measured node data that obtains more refinement, obtain trunk chest and abdominal part impedance data thereby analyze, improved the accuracy of human body impedance measuring, utilization has been arranged further according to the Fat Distribution situation at the impedance analysis trunk position at trunk position.
The above is preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from principle described in the utility model; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims (10)

1. a human body impedance measuring equipment is characterized in that, comprising:
Processor, at least two pairs of on-fixed electrode pairs that are connected with described processor, the first fixed electrode to, the second fixed electrode to, the 3rd fixed electrode to and the 4th fixed electrode pair.
2. human body impedance measuring equipment according to claim 1 is characterized in that,
The first on-fixed electrode pair in described at least two on-fixed electrode pairs comprises: the first voltage sample on-fixed electrode and the first exciting current on-fixed electrode;
The second on-fixed electrode pair in described at least two on-fixed electrode pairs comprises: second voltage sampling on-fixed electrode and the second exciting current on-fixed electrode;
Described the first fixed electrode is to comprising: the first voltage sample fixed electrode and the first exciting current fixed electrode;
Described the second fixed electrode is to comprising: second voltage sampling fixed electrode and the second exciting current fixed electrode;
Described the 3rd fixed electrode is to comprising: tertiary voltage sampling fixed electrode and the 3rd exciting current fixed electrode;
Described the 4th fixed electrode is to comprising: the 4th voltage sample fixed electrode and the 4th exciting current fixed electrode.
3. human body impedance measuring equipment according to claim 2 is characterized in that,
Described the first voltage sample on-fixed electrode, described second voltage sampling on-fixed electrode, described the first voltage sample fixed electrode, described second voltage sampling fixed electrode, described tertiary voltage sampling fixed electrode and the 4th voltage sample fixed electrode of being connected all are connected with a plurality of voltages gauge tap, described plurality of voltages gauge tap is connected with a voltage signal converter section and is connected with described processor, and described voltage signal converter section is connected with described processor;
Described the first exciting current on-fixed electrode, described the second exciting current on-fixed electrode, described the first exciting current fixed electrode, described the second exciting current fixed electrode, described the 3rd exciting current fixed electrode and the 4th exciting current fixed electrode of being connected all are connected with a Multi-path electricity flow control switch, described Multi-path electricity flow control switch is connected with a current signal converter section and is connected with described processor, and described current signal converter section is connected with described processor.
4. human body impedance measuring equipment according to claim 3, it is characterized in that, described Multi-path electricity flow control switch and described plurality of voltages gauge tap include a control end, input and outfan, wherein said control end is connected with described processor, the input of described Multi-path electricity flow control switch is connected with described current signal converter section, the outfan of described Multi-path electricity flow control switch and described the first exciting current on-fixed electrode, described the second exciting current on-fixed electrode, described the first exciting current fixed electrode, described the second exciting current fixed electrode, described the 3rd exciting current fixed electrode and one or more connection of being connected in the 4th exciting current fixed electrode; The input of described plurality of voltages gauge tap and described the first voltage sample on-fixed electrode, described second voltage sampling on-fixed electrode, described the first voltage sample fixed electrode, described second voltage sampling fixed electrode, described tertiary voltage sampling fixed electrode and in the 4th voltage sample fixed electrode one or more of being connected are connected, and the outfan of described plurality of voltages gauge tap is connected with described voltage signal converter section.
5. human body impedance measuring equipment according to claim 3, it is characterized in that, described voltage signal converter section comprises: the voltage signal conditioner that is connected with described plurality of voltages gauge tap, and the voltage signal A/D converter that is connected with described voltage signal conditioner, described voltage signal A/D converter is connected with described processor;
Described current signal converter section comprises: the current signal regulator that is connected with described Multi-path electricity flow control switch, and the current signal generator that is connected with described current signal regulator, described current signal generator is connected with described processor.
6. human body impedance measuring equipment according to claim 5 is characterized in that, described voltage signal conditioner comprises: a voltage signal amplifier and the voltage signal wave filter that is connected with described voltage signal amplifier.
7. human body impedance measuring equipment according to claim 5, it is characterized in that, described the first on-fixed electrode pair, described the second on-fixed electrode pair, described the first fixed electrode to, described the second fixed electrode to, described the 3rd fixed electrode to and wantonly 1 end that also connects a measuring resistance of described the 4th fixed electrode centering, the other end ground connection of described measuring resistance.
8. human body impedance measuring equipment according to claim 1 is characterized in that, described processor also is connected with a host computer by one 232 level signal change-over circuits.
9. human body impedance measuring equipment according to claim 8 is characterized in that, described 232 level signal change-over circuits are connected with described host computer by a serial ports.
10. each described human body impedance measuring equipment is characterized in that according to claim 1-9, also comprises: be the power supply of whole power devices.
CN 201220304282 2012-06-26 2012-06-26 Impedance measuring equipment for human bodies Expired - Lifetime CN202654129U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104502723A (en) * 2015-01-07 2015-04-08 四川锦江电子科技有限公司 Resistor detection circuit of high-frequency therapeutic equipment
CN104545910A (en) * 2014-12-29 2015-04-29 深圳市前海安测信息技术有限公司 Method and system for chronic disease early period electrophysiological detection
WO2016058233A1 (en) * 2014-10-18 2016-04-21 深圳市前海安测信息技术有限公司 Method, device, and system for early electrophysiological detection of chronic disease
CN112263323A (en) * 2020-09-30 2021-01-26 杭州睿笛生物科技有限公司 Impedance measuring device, ablation equipment and method for generating impedance map

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016058233A1 (en) * 2014-10-18 2016-04-21 深圳市前海安测信息技术有限公司 Method, device, and system for early electrophysiological detection of chronic disease
CN104545910A (en) * 2014-12-29 2015-04-29 深圳市前海安测信息技术有限公司 Method and system for chronic disease early period electrophysiological detection
CN104545910B (en) * 2014-12-29 2017-08-22 深圳市前海安测信息技术有限公司 Chronic disease early stage electro physiology detection method and system
CN104502723A (en) * 2015-01-07 2015-04-08 四川锦江电子科技有限公司 Resistor detection circuit of high-frequency therapeutic equipment
CN104502723B (en) * 2015-01-07 2018-02-06 四川锦江电子科技有限公司 High-frequency treatment device on resistance detects circuit
CN112263323A (en) * 2020-09-30 2021-01-26 杭州睿笛生物科技有限公司 Impedance measuring device, ablation equipment and method for generating impedance map

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