TW201343133A - A method and an apparatus to measure the skin capacitances and signals - Google Patents

Abstract

A method and an apparatus to measure the skin capacitances and signals are disclosed. The method comprises an electrode adhesion step, a power supplying step and a capacitance measuring step. The apparatus comprises a first electrode, a second electrode, a voltage modulator and a capacitance measuring device. With the proposed method and apparatus, the skin capacitances and the related physical and psychological signals related thereto can be accurately measured.

Description

Skin signal capacitance measuring method and device thereof

The invention discloses a skin signal capacitance measuring method and a device thereof, in particular, measuring the capacitance change of the skin in an applied voltage modulator and under different modulation frequency conditions, and all the measurements related to the skin signal capacitance measurement. The method of measuring the physiological and psychological signals inside the body and its device.

In many medical researches, when the human body produces lesions, the physiological potential of the ion dipole in the human body changes and the state of rotation or redistribution changes, and the change in the ion dipole will instantly cause the human body. Changes in physiological potential. It can be seen that if the change of the human body potential can be accurately detected, the human health can be accurately determined.

The conventional method for detecting human body potential generally attaches at least one sensing electrode to human skin, and uses the sensing electrode to sense a resistance value of the skin surface, and then compares the resistance value with the skin surface resistance value under healthy conditions. To determine the potential changes and health of the human body.

However, the sensing electrode senses the resistance value of the skin surface, and the measurement of the resistance value may cause misalignment in many conditions, such as skin capillary pores attached to the sensing electrode to open and close, and skin muscles attached to the sensing electrode. When the jitter and contraction, or the skin attached to the sensing electrode is sweaty and excessively humid, all of the above conditions may cause the sensing electrode to not accurately sense the resistance value of the skin.

The method of sensing the skin resistance value by using the induction electrode is intended to determine the change of the body potential by using the change in the resistance value, and to estimate the health of the body. If there are many implementation defects in the method of measuring the skin resistance value, and the measured resistance value cannot correctly reflect the body potential change, measuring the skin resistance value is not a correct method for judging the health of the body. In view of this, it is necessary to re-establish a method for measuring the electrical signals of other types of skin.

The main object of the present invention is to provide a skin signal capacitance measuring method and a device thereof, wherein the capacitance value measured by the method can accurately represent the body potential change.

In order to achieve the above object, the skin signal capacitance measuring method of the present invention comprises: an electrode attaching step of attaching a first electrode and a second electrode to a first part of a skin of a subject And a second portion, and the contact area of the first electrode and the first portion is the same as the contact area of the second electrode and the second portion; an applied voltage input step, using the external voltage modulator to the first electrode And the second electrode applies an alternating voltage of the same frequency value and the same voltage value range, and transmits the alternating current voltage to the first portion and the second portion of the skin of the subject by the first electrode and the second electrode respectively And a capacitance value measuring step of measuring a capacitance value between the first electrode and the second electrode between the first electrode and the second electrode after the application of the alternating voltage by using a capacitance measuring device The capacitance between the first part and the second part of the skin of the subject.

In the skin signal capacitance measuring method of the present invention, the alternating voltage of the external voltage modulator outputted to the first electrode and the second electrode has a phase difference of 180°.

The skin signal capacitance measuring method of the present invention, wherein the applied voltage modulator outputs a voltage value ranging from -50V to 50V.

The skin signal capacitance measuring method of the present invention, wherein the applied voltage modulator outputs a frequency value ranging from 0.1 kHz to 100 MHz.

The skin signal capacitance measuring device of the present invention comprises: a first electrode having a sensing surface; a second electrode having a sensing surface, the sensing surface of the second electrode having the same area as the sensing of the first electrode An area of the surface; an external voltage regulator electrically connected to the first electrode and the second electrode to output an alternating current voltage to the first electrode and the second electrode; and a capacitance detector electrically connected to the first An electrode and a second electrode are configured to measure a capacitance value between the first electrode and the second electrode.

In the skin signal capacitance measuring device of the present invention, the first electrode has a plurality of first extending portions, the second electrode has a plurality of second extending portions, and the first extending portion and the second extending portion are staggered.

In the skin signal capacitance measuring device of the present invention, the sensing surface of the first electrode is circular, the sensing surface of the second electrode is annular, and the second electrode ring is disposed on the outer side of the first electrode.

The skin signal capacitance measurement result of the present invention further shows many important applications, including that under certain bias conditions, the capacitance value has a constant value that appears repeatedly and any two people have different characteristic values, and this characteristic can be developed. The application of the identification system.

The above and other objects, features and advantages of the present invention will become more <RTIgt;

The "frequency" as used in the present invention refers to the number of periodic changes when an AC bias is applied to detect the change in the capacitance of the skin signal.

The "phase" as used in the present invention refers to a measure of the change of the periodic signal waveform, and a complete periodic signal is 360°.

The "phase difference" as used in the present invention refers to the difference in the measurement of the waveform change between two periodic signals.

Referring to FIG. 1, the skin signal capacitance measuring method of the present invention comprises an electrode attaching step S1, an applied voltage input step S2, and a capacitance value measuring step S3.

Please refer to FIG. 2 , which is a preferred embodiment of the skin signal capacitance measuring method of the present invention. The device comprises: a first electrode 1 , a second electrode 2 , an applied voltage modulator 3 , and A capacitance detector 4. The first electrode 1 and the second electrode 2 are electrically connected to the applied voltage modulator 3 and the capacitance sensor 4 .

In the method of measuring the skin signal capacitance of the present invention, the electrode attaching step S1 is performed by attaching the first electrode 1 and the second electrode 2 to a first portion and a second portion of a skin of a subject, respectively. The contact area of the first electrode 1 with the first portion is the same as the contact area of the second electrode 2 with the second portion.

In order to detect a change in capacitance between the first portion and the second portion of the skin of the subject, the first electrode 1 and the second electrode 2 must be attached to the first portion and the second portion, respectively, and the first The electrode 1 and the second electrode 2 are attached to the first portion and the second portion with the same contact area, so as to avoid distortion or intersection of the power lines between the first electrode 1 and the second electrode 2 due to different contact areas. The detection accuracy of the capacitance value between the first part and the second part of the skin of the subject is increased.

The applied voltage is input to step S2, and the first electrode 1 and the second electrode 2 are applied with an alternating voltage of the same frequency value and the same voltage value range by the applied voltage modulator 3, and the first electrode 1 is The second electrode 2 transmits the alternating voltage to the first portion and the second portion of the skin of the subject, respectively.

The voltage value range of the AC voltage is not limited herein, and preferably ranges from -50V to 50V. The frequency value of the AC voltage is not limited herein, and preferably ranges from 0.1 KHz to 100 MHz. In the range of the above voltage range and frequency value, the detection can be detected without harming the human body. The apparent skin signal capacitance value changes to achieve a better capacitance value measurement result. The applied voltage modulator 3 can be a DC or AC voltage modulator, and when the applied voltage modulator 3 is selected as an AC voltage modulator, the applied voltage modulator 3 outputs the same. The alternating current voltage of the first electrode 1 and the second electrode 2 may be a square wave or a sine wave according to a fixed frequency value, and the waveform of the alternating voltage of the first electrode 1 and the second electrode 2 is preferably reversed. That is, the phase difference of the AC voltage received by the first electrode 1 and the second electrode 2 is 180°, thereby achieving a capacitance measurement result. For example, by the AC voltage output by the external voltage regulator 3, the voltage value can be set between +10V and -10V, and the frequency value can be set at 6000Hz, so that the voltage value of the AC voltage can be Periodically fluctuating between -10V and +10V at a frequency of 6000 Hz, and causing the first electrode 1 and the second electrode 2 to receive an AC voltage having the same voltage value, the same frequency value, and a phase difference of 180°.

The capacitance value measuring step S3 uses the capacitance measuring device 4 to measure the capacitance between the first electrode 1 and the second electrode 2 between the first electrode 1 and the second electrode 2 after the application of the alternating voltage. The value is used as the capacitance between the first part and the second part of the skin of the subject.

More specifically, the human skin comprises a dermis layer and a stratum corneum, the horny layer being coated outside the dermis layer, wherein the dermis layer is a conductor and the stratum corneum is an insulator. When the first electrode 1 and the second electrode 2 are attached to the stratum corneum of the human skin and are subjected to a voltage, the charge dipole change between the stratum corneum and the dermis layer may be indirectly affected, and the first electrode 1 and the first electrode A capacitance value is generated between the two electrodes, and the capacitance value can also be regarded as a capacitance value of the first portion and the second portion of the skin of the subject, so the capacitance detector 4 can measure the first electrode The capacitance value between the first electrode and the second electrode 2 is used as the capacitance value between the first electrode and the second portion of the skin of the subject.

In addition, when the alternating voltage generates a periodic voltage value change along a frequency value, the charge dipole change of the human skin changes, that is, different voltage values can make the first part of the skin of the subject And the second part produces different capacitance values, and under the same voltage value range but different frequency values of the alternating voltage, the human body skin charge dipole change speed is different, even the first part and the second of the subject's skin The same voltage value is applied to the part, and the different frequency values also cause different capacitance values of the first part and the second part of the skin of the subject. In order to completely record the relative relationship between the capacitance value of the skin of the subject and the voltage value change and the frequency value, the capacitance detector 4 is applied to the first electrode 1 and the second electrode 2 after an alternating voltage is applied. The capacitance value change between the first electrode 1 and the second electrode 2 is continuously measured to completely record the capacitance effects of the first portion and the second portion of the skin of the subject at different voltage values and different frequency values.

The method for measuring the capacitance of the first portion and the second portion of the skin of the subject is to attach the first electrode 1 and the second electrode 2 to the first portion and the second portion, respectively, by the first electrode 1 And the second electrode 2 respectively stimulates the first part and the second part of the skin of the subject with a periodic voltage change, so that a charge dipole change occurs between the stratum corneum and the dermis layer and has a capacitive effect, and the capacitive effect is not affected The capillary opening on the surface of the skin, the movement of the subject's limbs or the wetness of the skin surface, so measuring the value of the skin signal capacitance, can correctly reflect the potential change of the human body, can be accurately and repetitively judged In addition to human health, all information related to physical or mental state can be revealed. .

Referring to FIG. 2, a preferred embodiment of the method for measuring the skin signal capacitance of the present invention, the first electrode 1 has a sensing surface for attaching the skin of the subject, and the second electrode has a sensing surface for attaching The skin of the subject is attached, and the area of the sensing surface of the first electrode is the same as the area of the sensing surface of the second electrode. The shape of the first electrode 1 and the second electrode 2 is not limited herein. In the second embodiment of FIG. 3, the first electrode 1 has a plurality of first extensions 11, and the second The electrode 2 has a plurality of second extending portions 21, and the first extending portion 11 and the second extending portion 21 are staggered. With the above arrangement, the power line between the first electrode 1 and the second electrode 2 can be better. Distribution, to avoid the power lines interlaced with each other to achieve better capacitance measurement. Referring to FIG. 4, in a fourth embodiment of the present invention, the sensing surface of the first electrode 1 is circular, the sensing surface of the second electrode 2 is annular, and the second electrode 2 is disposed in the first With the above arrangement, the power line between the first electrode 1 and the second electrode 2 can be preferably distributed to avoid staggering the power lines to achieve a better capacitance measurement effect. The applied voltage modulator 3 is electrically connected to the first electrode 1 and the second electrode 2 to output the AC voltage to the first electrode 1 and the second electrode 2. The capacitance detector 4 is electrically connected to the first electrode 1 and the second electrode 2 to measure the capacitance between the first electrode 1 and the second electrode 2.

Referring to FIG. 5, it is a method for measuring the skin signal capacitance of the present invention and a device thereof. The capacitance detector 4 is electrically connected to a processor 5, and the processor 5 is electrically connected to a database. 6. The processor 5 is configured to read the capacitance value measured by the capacitance measuring device 4, and perform data processing on the capacitance value to generate a capacitance-voltage relationship table or a capacitance-frequency relationship table. Skin signal capacitance information. The database 6 can be a cloud database for storing at least one skin signal capacitance information of the subject. In this embodiment, the database stores at least one skin signal capacitance information of the subject under healthy conditions. When the processor 5 receives the skin signal capacitance of the current measurement of the subject measured by the capacitance measuring device 4, the skin signal capacitance may be integrated into the skin signal capacitance information, and then the processor 5 Using the cloud transmission technology such as wired or wireless, the skin signal capacitance information of the same subject in the database 6 in the healthy state is read, and the skin signal capacitance information of the database 6 and the skin signal received to the capacitance detector 4 are read. The capacitance information is compared to determine the body potential state of the subject, and then the health of the subject is estimated. According to the above application method, the skin signal capacitance measuring method can be used not only as a health check item but also as a health check item. It can be combined with a variety of means such as cloud medical treatment to achieve better personal health monitoring, remote medical care, and cloud independent health management.

The skin signal capacitance measuring method and the required device thereof are described in the present invention, and the measured skin signal capacitance value is not affected by the humidity of the skin surface or the movement of the limb, and has accurate and reproducible appearance to exhibit physiological physiology. The effect of potential changes affected by psychology. Therefore, the measured skin signal capacitance value can be used not only as a remote medical or health check item, but also because the skin signal capacitance values of any two people are different, it can be developed as an identity recognition system by this feature. application.

While the invention has been described in connection with the preferred embodiments described above, it is not intended to limit the scope of the invention. The technical scope of the invention is protected, and therefore the scope of the invention is defined by the scope of the appended claims.

[this invention]

1. . . First electrode

11. . . First extension

2. . . Second electrode

twenty one. . . Second extension

3. . . Applied voltage modulator

4. . . Capacitance detector

5. . . processor

6. . . database

S1. . . Electrode attachment step

S2. . . Applied voltage input step

S3. . . Capacitance value measurement step

Fig. 1 is a flow chart showing the method for measuring the skin signal capacitance of the present invention.

Fig. 2 is a first embodiment of the skin signal capacitance measuring device of the present invention.

Fig. 3 is a view showing a second embodiment of the skin signal capacitance measuring device of the present invention.

Fig. 4 is a view showing a third embodiment of the skin signal capacitance measuring device of the present invention.

Fig. 5 is a schematic view showing the application of the skin signal capacitance measuring device of the present invention.

S1. . . Electrode attachment step

S2. . . Applied voltage input step

S3. . . Capacitance value measurement step

Claims (7)

A skin signal capacitance measuring method includes: an electrode attaching step of attaching a first electrode and a second electrode to a first portion and a second portion of a skin of a subject, and a contact area of the first electrode and the first portion is the same as a contact area of the second electrode and the second portion; and an applied voltage input step, applying the same frequency to the first electrode and the second electrode by using an external voltage modulator And an alternating current voltage of the same voltage value range, and transmitting the alternating current voltage to the first portion and the second portion of the skin of the subject by the first electrode and the second electrode respectively; and a capacitance value measuring step Using a capacitance measuring device, measuring the capacitance between the first electrode and the second electrode between the first electrode and the second electrode after applying the alternating voltage, as the first part of the skin of the subject And the capacitance value between the second part. The skin signal capacitance measuring method according to claim 1, wherein the alternating voltage of the external voltage modulator outputted to the first electrode and the second electrode has a phase difference, and the phase difference is 180°. The skin signal capacitance measuring method according to claim 1, wherein the voltage of the external voltage modulator is in a range of -50V to 50V. The skin signal capacitance measuring method according to claim 1, wherein the applied voltage modulator outputs a frequency value ranging from 0.1 kHz to 100 MHz. A skin signal capacitance measuring device comprises: a first electrode having a sensing surface; a second electrode having a sensing surface, the sensing surface of the second electrode having the same area as the sensing surface of the first electrode An external voltage regulator electrically connected to the first electrode and the second electrode to output an alternating current voltage to the first electrode and the second electrode; and a capacitance detector electrically connected to the first electrode And a second electrode to measure a capacitance value between the first electrode and the second electrode. The skin signal capacitance measuring device according to claim 5, wherein the first electrode has a plurality of first extending portions, the second electrode has a plurality of second extending portions, and the first extending portion and the first extending portion The two extensions are staggered. The skin signal capacitance measuring device according to claim 5, wherein the sensing surface of the first electrode is circular, the sensing surface of the second electrode is annular, and the second electrode ring is disposed on the first electrode. Outside.