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Method and system for generating physiological signals using cloth capacitive sensors

A capacitive sensor, physiological signal technology, applied in the direction of sensors, applications, medical science, etc., can solve the problem of not considering the equivalent parasitic capacitance

Active Publication Date: 2011-12-28
杨章民
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Jun Rekimoto has developed a technology that can measure the distance between conductive objects. He measures the capacitance between the electrodes and the conductive objects and uses a transmitter and an electrode receiver. When the human body approaches the two electrodes, its The capacitance becomes larger, which is used to detect proximity and position (proximity and position sensor). Since the detection gesture does not directly touch the skin, it does not take into account the equivalent parasitic capacitance of the human body, and there is no difference in pressure, tension or torque. and produce different results

Method used

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  • Method and system for generating physiological signals using cloth capacitive sensors
  • Method and system for generating physiological signals using cloth capacitive sensors
  • Method and system for generating physiological signals using cloth capacitive sensors

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0160] Using a single silver fiber cloth in contact with the skin of the hand, the movement of the frequency can be read, as shown in Tables 1-1 and 1-2.

[0161] Table 1-1: Single Conductive Zone Test

[0162]

[0163] Table 1-2: Single Conductive Zone Test

[0164]

[0165] From the results in Tables 1-1 and 1-2, we can interpret as Figure 13 In the model shown, under normal conditions, the impedance of human skin is about 500-1000 ohms, so the human body is regarded as a good conductor. Therefore, the change in frequency only represents the capacitance change between the cloth and the skin in the conductive area, but due to the body itself There is also an equivalent parasitic capacitance C3 whose capacitance (C3) is lower in value than the capacitance C1 between the skin and the fabric in the conductive area. Since the equivalent capacitance Ceq we measured is C1 and C3 in series, its value is:

[0166]

[0167] The period C3 is very small, so the total value ...

Embodiment 2

[0170] Two conductive areas are used to contact the skin of both hands, one hand is the conductive area cloth, the other hand is the traditional electrode as the conductive area cloth, and the traditional electrode is connected to the ground of the circuit.

[0171] The data are shown in Table 2-1 and Table 2-2. Table 2-1 is the result of using a silver fiber cloth alone, and Table 2-2 is the result of using a silver fiber cloth covered with sponge as the electrode. The model of this data is as follows Figure 14 As shown, since one hand is in contact with the conventional electrode, the capacitance between the conventional electrode and the human body is almost equal to zero. Therefore, the capacitance between the traditional electrode and the human body will cause the parasitic capacitance C3 to be relatively short-circuited, so that the equivalent capacitance Ceq of the entire system is approximately equal to C1.

[0172] The actual operation data is as follows. In Table 2...

Embodiment 3

[0182] Use two conductive area cloths to contact the skin of both hands, one conductive area cloth is silver fiber cloth; the other conductive area cloth is silver fiber cloth wrapped with sponge. The results are similar to those in Table 2-1 and Table 2-2, but the effect is better when the sponge electrode is placed. The frequency shift between these two cases is very pronounced.

[0183] Our data are shown in Table 3-1, Table 3-2 and Table 3-3. Table 3-1 shows the use of two silver fiber cloths. Table 3-2 uses one silver fiber cloth; the other uses silver fiber cloth to wrap the sponge. Table 3-3 uses two silver fiber cloths to wrap the sponge. The model for this data is Figure 16 As shown in the figure, because the two conductive area fabrics generate two capacitances C1 and C2 when the electrodes are in contact with the skin. Therefore, the entire system has C1, C2 and the parasitic capacitance C3 of the human body, so the equivalent capacitance Ceq is approximately e...

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Abstract

A method and a system for generating physiological signals with fabric capacitive sensors are provided. The system uses at least one fabric, and at least one conduction region is provided on the fabric. A capacitance is formed between the conduction region and the region in contact with human body. In a case that a signal is provided externally, when a pressure,a pull or a tension between the human body and the fabric makes the capacitance change, or the changes of the medium constants between the human body and the fabric makes the capacitance change, the changes of capacitance can be detected. The changes of capacitance are shown as frequency, voltage or current, and therefore the changes of resonance frequency, voltage or current are generated. The physiological parameters of human body, such as gesture, swallowing, coughing, respiration, perspiring, even heartbeat and the like, are reflected by the changes of resonance frequency, voltage or current. The signal range of the frequency, voltage or current are changed by the fabric capacitive sensors connected in series or in parallel with a switch, a resistance R, a capacitance C or an inductance L.

Description

technical field [0001] The present invention relates to a method and system that can be used to detect human physiological energy, such as applied in physical training, medical treatment, fitness, health care, etc., in particular to a method of using at least one piece of cloth and at least one conductive area disposed on the cloth, In contact with the human body, a capacitor is formed between the two. When there is pressure, tension or torsion between the human body and the cloth, the capacitance changes, or the dielectric constant between the human body and the cloth changes and the capacitance value changes. Under the action of a signal provided by the outside world, a resonance frequency, voltage or current is generated, and the resonance frequency, voltage or current is used to detect human physiological parameters, such as breathing, swallowing, humidity, coughing, sweating, heartbeat, and can also be used for posture Detection of parameters, such as position, speed, acc...

Claims

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Application Information

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IPC IPC(8): A61B5/00
Inventor 杨章民杨子琳杨景雯杨皓
Owner 杨章民
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