CN203988052U - For measuring the device of bio-electrical impedance - Google Patents
For measuring the device of bio-electrical impedance Download PDFInfo
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- CN203988052U CN203988052U CN201420379027.1U CN201420379027U CN203988052U CN 203988052 U CN203988052 U CN 203988052U CN 201420379027 U CN201420379027 U CN 201420379027U CN 203988052 U CN203988052 U CN 203988052U
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Abstract
It is a kind of for measuring the device of bio-electrical impedance that this utility model provides.Described device comprises: sinusoidal signal generator, a plurality of emission electrodes, a plurality of collecting electrodes, the first voltage detector, amperometric, the first divider, phase inverter, the first multidiameter option switch, the second multidiameter option switch, the 3rd multidiameter option switch, the 4th multidiameter option switch, wherein, amperometric is connected between the outfan of sinusoidal signal generator and the input of the first multidiameter option switch, phase inverter is connected between the outfan of sinusoidal signal generator and the input of the second multidiameter option switch, the outfan of the first voltage detector is connected to the dividend input of the first divider, the outfan of amperometric is connected to the divisor input of the first divider, the outfan of the first divider is exported the bioelectric impedance value at tested position.According to of the present utility model, for measuring the device of bio-electrical impedance, circuit structure is simple, and certainty of measurement is high.
Description
Technical field
This utility model relates to bio-electrical impedance technical field, more particularly, relates to a kind of for measuring the device of bio-electrical impedance.
Background technology
Electrical Bioimpedance Measurement Technology be utilize biological tissue and organ electrical characteristics (for example, impedance, admittance, dielectric constant etc.) and change, a kind of Dynamic Non-Destruction Measurement of extraction and Human Physiology, biomedical information that pathology is relevant, have safety, effectively, advantage easily.It applies small alternating current (or voltage) signal by means of the emission electrode of the Body contact with measured to tested body part conventionally, by collecting electrode, detect voltage (or electric current) signal at tested position simultaneously, according to the signal of telecommunication detecting, calculate corresponding bio-electrical impedance and variation thereof, thereby obtain relevant physiology and pathological information.
Because bio-electrical impedance can reflect the compositions such as body water, fat, protein to a certain extent, therefore, can provide scientific basis for fat-reducing, muscular training etc., important role all in fields such as sports medical science, rehabilitation medicine, simultaneously to spaces that is all widely used such as all kinds of crowds' health survey, assessment of nutritional status and relevant disease diagnosis.Therefore, for measuring the device of bio-electrical impedance, be widely used in every field, but existing for measuring the device circuit complex structure of bio-electrical impedance, and certainty of measurement need to improve.
Utility model content
It is a kind of for measuring the device of bio-electrical impedance that the purpose of this utility model is to provide, and its circuit structure is simple, and certainty of measurement is high.
It is a kind of for measuring the device of bio-electrical impedance that this utility model provides, it is characterized in that comprising: sinusoidal signal generator, a plurality of emission electrodes, a plurality of collecting electrodes, the first voltage detector, amperometric, the first divider, phase inverter, the first multidiameter option switch, the second multidiameter option switch, the 3rd multidiameter option switch, the 4th multidiameter option switch, wherein, amperometric is connected between the outfan of sinusoidal signal generator and the input of the first multidiameter option switch, a plurality of outfans of the first multidiameter option switch are connected with described a plurality of emission electrodes respectively, phase inverter is connected between the outfan of sinusoidal signal generator and the input of the second multidiameter option switch, a plurality of outfans of the second multidiameter option switch are connected with described a plurality of emission electrodes respectively, described a plurality of collecting electrode is connected respectively to a plurality of inputs of the 3rd multidiameter option switch, the outfan of the 3rd multidiameter option switch is connected to the first input end of the first voltage detector, described a plurality of collecting electrode is connected respectively to a plurality of inputs of the 4th multidiameter option switch, the outfan of the 4th multidiameter option switch is connected to the second input of the first voltage detector, the outfan of the first voltage detector is connected to the dividend input of the first divider, the outfan of amperometric is connected to the divisor input of the first divider, the outfan of the first divider is exported the bioelectric impedance value at tested position.
Alternatively, described the first voltage detector comprises: wave filter, carries out filtering to the signal of telecommunication receiving; Difference amplifier, carries out differential amplification to the filtered signal of telecommunication; Demodulator, carries out demodulation to the signal of telecommunication after differential amplification; Analog-digital converter, is converted to digital signal by the signal of telecommunication after demodulation.
Alternatively, described amperometric comprises: reference resistor, second voltage detector, the second divider, wherein, reference resistor is connected between the outfan of sinusoidal signal generator and the input of the first multidiameter option switch, second voltage detector is in parallel with reference resistor, the outfan of second voltage detector is connected to the dividend input of the second divider, the resistance value of reference resistor is input to the divisor input of the second divider, and the outfan of the second divider is connected to the divisor input of the first divider.
Alternatively, described second voltage detector comprises: wave filter, carries out filtering to the signal of telecommunication receiving; Difference amplifier, carries out differential amplification to the filtered signal of telecommunication; Demodulator, carries out demodulation to the signal of telecommunication after differential amplification; Analog-digital converter, is converted to digital signal by the signal of telecommunication after demodulation.
Alternatively, described reference resistor is the resistor of 0.1% precision.
Alternatively, described sinusoidal signal generator comprises: Direct Digital Synthesizer (DDS), generates sine voltage signal; Voltage-controlled Current Source (VCCS), is converted to current signal by the sine voltage signal of generation.
For measuring the device of bio-electrical impedance, its circuit structure is simple according to of the present utility model, be easy to realize, and certainty of measurement is high.
By part in ensuing description set forth this utility model general plotting other aspect and/or advantage, some will be clearly by descriptions, or can pass through the enforcement of this utility model general plotting and learn.
Accompanying drawing explanation
By the detailed description of carrying out below in conjunction with accompanying drawing, above-mentioned and other objects, features and advantages of the present utility model will become apparent, wherein:
Fig. 1 illustrate according to exemplary embodiment of the present utility model for measuring the structured flowchart of the device of bio-electrical impedance;
Fig. 2 illustrates according to the structured flowchart of the voltage detector of exemplary embodiment of the present utility model.
The specific embodiment
Now this utility model embodiment is described in detail, its example shown in the accompanying drawings.Below with reference to the accompanying drawings embodiment is described to explain this utility model.
Fig. 1 illustrate according to exemplary embodiment of the present utility model for measuring the structured flowchart of the device of bio-electrical impedance.
With reference to Fig. 1, according to comprising for measuring the device 10 of bio-electrical impedance of exemplary embodiment of the present utility model: sinusoidal signal generator 101, amperometric 102, phase inverter 103, a plurality of emission electrode 104, a plurality of collecting electrode 105, the first multidiameter option switch 106, the second multidiameter option switch 107, the 3rd multidiameter option switch 108, the 4th multidiameter option switch 109, the first voltage detector 110 and the first divider 111.
Amperometric 102 is connected between the outfan of sinusoidal signal generator 101 and the input of the first multidiameter option switch 106, a plurality of outfans of the first multidiameter option switch 106 are connected with a plurality of emission electrodes 104 respectively, phase inverter 103 is connected between the outfan of sinusoidal signal generator 101 and the input of the second multidiameter option switch 107, and a plurality of outfans of the second multidiameter option switch 107 are connected with a plurality of emission electrodes 104 respectively.A plurality of collecting electrodes 105 are connected respectively to a plurality of inputs of the 3rd multidiameter option switch 108, the outfan of the 3rd multidiameter option switch 108 is connected to the first input end of the first voltage detector 110, a plurality of collecting electrodes 105 are connected respectively to a plurality of inputs of the 4th multidiameter option switch 109, the outfan of the 4th multidiameter option switch 109 is connected to the second input of the first voltage detector 110, the outfan of the first voltage detector 110 is connected to the dividend input of the first divider 111, the outfan of amperometric 102 is connected to the divisor input of the first divider 111, the outfan of the first divider 111 is exported the bioelectric impedance value at tested position.
Below in conjunction with Fig. 1, introduce in detail the process of measuring the bio-electrical impedance at tested position for measuring the device 10 of bio-electrical impedance.
By for example, for (measuring tested position that the device 10 of bio-electrical impedance measures measured, left arm, right arm, left lower limb, right lower limb, trunk etc.) bio-electrical impedance before, measured should contact with a plurality of emission electrodes 104 and a plurality of collecting electrode 105 according to certain way.For example, measured's contacts with two emission electrodes 104 and two collecting electrodes 105 with the corresponding hands in tested position and foot.For example, when tested position is left arm, measured's left hand contacts with an emission electrode 104, and left foot contacts with an emission electrode 104, and left hand contacts with a collecting electrode 105 simultaneously, and the right hand contacts with a collecting electrode 105.
For measuring the device 10 of bio-electrical impedance, there is the typical case of four emission electrodes 104 and four collecting electrodes 105, before measurement, every of measured hands all should (for example contact with an emission electrode 104 and a collecting electrode 105 respectively, palm contacts with emission electrode 104, thumb contacts with collecting electrode 105), every foot all should (for example contact with an emission electrode 104 and a collecting electrode 105 respectively, forefoot contacts with emission electrode 104, and rear heel contacts with collecting electrode 105).
At each tested position of measuring measured (for example, left arm, right arm, left lower limb, right lower limb, trunk etc.) bio-electrical impedance time, by applying sinusoidal signal with the corresponding emission electrode 104 in tested position to tested position, by with corresponding another emission electrode 104 in tested position to tested position, apply with the sinusoidal signal of above-mentioned sinusoidal signal single spin-echo (, with reference to earth signal), thereby realize, to tested position, apply sinusoidal signal.Simultaneously by obtaining the signal of telecommunication at tested position with corresponding two collecting electrodes 105 in tested position, thereby, according to the signal of telecommunication obtaining, calculate the bio-electrical impedance at tested position.For example, tested position is left arm, can to tested position, apply sinusoidal signal by the emission electrode 104 contacting with left hand, by the emission electrode 104 contacting with left foot to tested position, apply with the sinusoidal signal of above-mentioned sinusoidal signal single spin-echo (, with reference to earth signal), thereby realize and apply sinusoidal signal to left arm, by the collecting electrode 105 contacting with left hand, obtain the signal of telecommunication at tested position with the collecting electrode 105 contacting with the right hand simultaneously, here, the emission electrode 104 contacting with left hand is and the corresponding emission electrode of left arm with the emission electrode 104 contacting with left foot, the collecting electrode 105 contacting with left hand is and the corresponding collecting electrode of left arm with the collecting electrode 105 contacting with the right hand.
Particularly, the sinusoidal signal of sinusoidal signal generator 101 outputs outputs to the input of the first multidiameter option switch 106 via amperometric 102, a plurality of outfans of the first multidiameter option switch 106 are connected with a plurality of emission electrodes 104 respectively, like this can by the first multidiameter option switch 106 by sinusoidal signal output to the corresponding emission electrode 104 in tested position on; Now, in the first multidiameter option switch 106, input links together with the outfan being connected with the corresponding emission electrode 104 in tested position.Meanwhile, the sinusoidal signal of sinusoidal signal generator 101 output is converted into the sinusoidal signal of single spin-echo via phase inverter 103, usings as with reference to earth signal.This outputs to the input of the second multidiameter option switch 107 with reference to earth signal, a plurality of outfans of the second multidiameter option switch 107 are connected with a plurality of emission electrodes 104 respectively, like this can by the second multidiameter option switch 107 by this with reference to earth signal output to corresponding another emission electrode 104 in tested position on; Now, in the second multidiameter option switch 107, input links together with the outfan being connected with corresponding another emission electrode 104 in tested position.Thereby, by above-mentioned two emission electrodes that are strobed 104, realize and apply sinusoidal signal to tested position.In addition, amperometric 102 is connected with tested position, thereby realizes the electric current that detects the tested position of flowing through.
A plurality of collecting electrodes 105 are connected respectively to a plurality of inputs of the 3rd multidiameter option switch 108, the outfan of the 3rd multidiameter option switch 108 is connected to the first input end of the first voltage detector 110, can the signal of telecommunication sensing with the corresponding collecting electrode 105 in tested position be input to by the 3rd multidiameter option switch 108 to the first input end of the first voltage detector 110 like this; Now, in the 3rd multidiameter option switch 108, input links together with the outfan being connected with the corresponding collecting electrode 105 in tested position.A plurality of collecting electrodes 105 are connected respectively to a plurality of inputs of the 4th multidiameter option switch 109, the outfan of the 4th multidiameter option switch 109 is connected to the second input of the first voltage detector 110, can the signal of telecommunication sensing with corresponding another collecting electrode 105 in tested position be input to by the 4th multidiameter option switch 109 to the second input of the first voltage detector 110 like this; Now, in the 4th multidiameter option switch 109, input links together with the outfan being connected with corresponding another collecting electrode 105 in tested position.That is, the first voltage detector 110 is realized in parallel with tested position by above-mentioned two collecting electrodes that are strobed 104, thereby realizes the voltage that detects two ends, tested position.
The voltage that the first voltage detector 110 detects is the voltage at two ends, tested position, the electric current that amperometric detects is the electric current at tested position of flowing through, therefore, the magnitude of voltage of the first voltage detector 110 outputs is input to the dividend input of the first divider 111, the current value of amperometric 102 outputs is input to the divisor input of the first divider 111, and the outfan of the first divider 111 is exported the bioelectric impedance value at tested position.
Sinusoidal signal generator 101 generates for being applied to the sinusoidal signal at tested position.Sinusoidal signal generator 101 can be various for generating device, circuit or the device of sinusoidal signal.As example, sinusoidal signal generator 101 can comprise: Direct Digital Synthesizer (not shown) and Voltage-controlled Current Source (not shown).Direct Digital Synthesizer (DDS) is for generating sine voltage signal, and the sine voltage signal that Voltage-controlled Current Source (VCCS) generates DDS is converted to current signal.
In addition, sinusoidal signal generator 101 (for example can generate a plurality of frequencies, 1kHz, 5kHz, 50kHz, 250kHz, 500kHz, 1000kHz etc.) sinusoidal signal, to apply the sinusoidal signal of different frequency to tested position, measure the bio-electrical impedance at each tested position under the sinusoidal signal of different frequency.
Phase inverter 103 is for being converted to the sinusoidal signal of sinusoidal signal generator 101 output the sinusoidal signal of single spin-echo, using as with reference to earth signal, thereby raising is applied to the stability of the sinusoidal signal at tested position, to improve certainty of measurement.
For different tested positions, input in the first multidiameter option switch 106 and the second multidiameter option switch 107 and linking together corresponding to the outfan at tested position, the input corresponding to tested position and outfan in the 3rd multidiameter option switch 108 and the 4th multidiameter option switch 109 link together.The first multidiameter option switch 106, the second multidiameter option switch 107, the 3rd multidiameter option switch 108 and the 4th multidiameter option switch 109 can be various device, circuit or the devices of selecting for realizing multichannel, for example, single pole multiple throw, multidiameter option switch of being formed by a plurality of relays etc.In addition, the first multidiameter option switch 106, the second multidiameter option switch 107, the 3rd multidiameter option switch 108 and the 4th multidiameter option switch 109 also can be integrated in a selection circuit, and this is not restricted.
The first voltage detector 110 can be that voltmeter, voltage transformer or other can detect circuit or the device of voltage.As example, the voltage detector that the first voltage detector 110 can be described by Fig. 2 is realized.
The first divider 111 can be realized by various device or the circuit that can realize division arithmetic, also can realize by micro-control unit (MCU), microcontroller etc., and this is not restricted.
Amperometric 102 can be that ammeter, current transformer or other can detect circuit or the device of electric current.As example, amperometric 102 can comprise: reference resistor (not shown), second voltage detector (not shown) and the second divider (not shown).
Reference resistor is connected between the outfan of sinusoidal signal generator 101 and the input of the first multidiameter option switch 106, that is, reference resistor is connected with detected part.Second voltage detector is in parallel with reference resistor, with the voltage at witness mark resistor two ends.The outfan of second voltage detector is connected to the dividend input of the second divider, the resistance value of reference resistor is input to the divisor input of the second divider, to be calculated the electric current of the reference resistor of flowing through by the second divider, that is, and the electric current at the tested position of flowing through.The outfan of the second divider is connected to the divisor input of the first divider 111, the current value calculating is input to the divisor input of the first divider 111.
Preferably, reference resistor is high-precision resistor, and to improve certainty of measurement, for example, reference resistor can be the resistor of 0.1% precision.
The second divider can be realized by various device or the circuit that can realize division arithmetic, also can realize by micro-control unit (MCU), microcontroller etc., and this is not restricted.
Second voltage detector can be that voltmeter, voltage transformer or other can detect circuit or the device of voltage.As example, the voltage detector that second voltage detector can be described by Fig. 2 is realized.
Fig. 2 illustrates according to the structured flowchart of the voltage detector of exemplary embodiment of the present utility model.
With reference to Fig. 2, according to the voltage detector of exemplary embodiment of the present utility model, comprise: wave filter 201, difference amplifier 202, demodulator 203 and analog-digital converter 204.
Wave filter 201 carries out filtering by the signal of telecommunication receiving.202 pairs of filtered signals of telecommunication of difference amplifier carry out differential amplification.The signal of telecommunication after 203 pairs of differential amplifications of demodulator carries out demodulation.Analog-digital converter 204 is converted to digital signal by the signal of telecommunication after demodulation.
Here, wave filter 201 can be the various circuit that can realize filtering or device (for example, broadband bandpass filter), difference amplifier 202 can be various circuit or the devices that can realize differential amplification, demodulator 203 can be various circuit or the devices that can realize demodulation, and analog-digital converter 204 can be variously can realize analog-to-digital circuit or device.
For measuring the device of bio-electrical impedance, its circuit structure is simple according to of the present utility model, be easy to realize, and certainty of measurement is high.
Although represented and described embodiment more of the present utility model, but those skilled in the art should understand that, in the situation that do not depart from principle of the present utility model and the spirit that is limited its scope by claim and equivalent thereof, can modify to these embodiment.
Claims (6)
1. one kind for measuring the device of bio-electrical impedance, it is characterized in that comprising: sinusoidal signal generator, a plurality of emission electrode, a plurality of collecting electrode, the first voltage detector, amperometric, the first divider, phase inverter, the first multidiameter option switch, the second multidiameter option switch, the 3rd multidiameter option switch, the 4th multidiameter option switch
Wherein, amperometric is connected between the outfan of sinusoidal signal generator and the input of the first multidiameter option switch, a plurality of outfans of the first multidiameter option switch are connected with described a plurality of emission electrodes respectively, phase inverter is connected between the outfan of sinusoidal signal generator and the input of the second multidiameter option switch, a plurality of outfans of the second multidiameter option switch are connected with described a plurality of emission electrodes respectively
Described a plurality of collecting electrode is connected respectively to a plurality of inputs of the 3rd multidiameter option switch, the outfan of the 3rd multidiameter option switch is connected to the first input end of the first voltage detector, described a plurality of collecting electrode is connected respectively to a plurality of inputs of the 4th multidiameter option switch, the outfan of the 4th multidiameter option switch is connected to the second input of the first voltage detector, the outfan of the first voltage detector is connected to the dividend input of the first divider, the outfan of amperometric is connected to the divisor input of the first divider, the outfan of the first divider is exported the bioelectric impedance value at tested position.
2. device according to claim 1, is characterized in that, described the first voltage detector comprises:
Wave filter, carries out filtering to the signal of telecommunication receiving;
Difference amplifier, carries out differential amplification to the filtered signal of telecommunication;
Demodulator, carries out demodulation to the signal of telecommunication after differential amplification;
Analog-digital converter, is converted to digital signal by the signal of telecommunication after demodulation.
3. device according to claim 1, is characterized in that, described amperometric comprises: reference resistor, second voltage detector, the second divider,
Wherein, reference resistor is connected between the outfan of sinusoidal signal generator and the input of the first multidiameter option switch, second voltage detector is in parallel with reference resistor, the outfan of second voltage detector is connected to the dividend input of the second divider, the resistance value of reference resistor is input to the divisor input of the second divider, and the outfan of the second divider is connected to the divisor input of the first divider.
4. device according to claim 3, is characterized in that, described second voltage detector comprises:
Wave filter, carries out filtering to the signal of telecommunication receiving;
Difference amplifier, carries out differential amplification to the filtered signal of telecommunication;
Demodulator, carries out demodulation to the signal of telecommunication after differential amplification;
Analog-digital converter, is converted to digital signal by the signal of telecommunication after demodulation.
5. device according to claim 3, is characterized in that, described reference resistor is the resistor of 0.1% precision.
6. device according to claim 1, is characterized in that, described sinusoidal signal generator comprises:
Direct Digital Synthesizer (DDS), generates sine voltage signal;
Voltage-controlled Current Source (VCCS), is converted to current signal by the sine voltage signal of generation.
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| CN201420379027.1U CN203988052U (en) | 2014-07-10 | 2014-07-10 | For measuring the device of bio-electrical impedance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108378850A (en) * | 2017-12-27 | 2018-08-10 | 诺仪器（中国）有限公司 | Body complex impedance measuring system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108378850A (en) * | 2017-12-27 | 2018-08-10 | 诺仪器（中国）有限公司 | Body complex impedance measuring system and method |
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Effective date of registration: 20160202 Address after: 133000, Yanbian industrial concentration area, 876 Hongyun street, Jilin, Yanji Patentee after: Donghua Jilin original medical equipment Co., Ltd. Address before: 102200 Changping District science and Technology Park, Beijing Road No. 1 Patentee before: Beijing Donghuayuan Medical Equipment Co., Ltd. |
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Effective date of registration: 20160406 Address after: 102200, No. 1, vibration road, Changping science and Technology Park, Beijing Patentee after: Beijing Donghuayuan Medical Equipment Co., Ltd. Address before: 133000, Yanbian industrial concentration area, 876 Hongyun street, Jilin, Yanji Patentee before: Donghua Jilin original medical equipment Co., Ltd. |