KR102115265B1 - Flexible pressure measuring system and large-sized textile having the same - Google Patents

Abstract

In a fibrous sensing system capable of correcting an unrestored state and a driving method thereof, the fibrous sensing system includes a fibrous sensor, a frequency applying unit, an impedance comparison unit, and an output unit. The fiber-type sensor is woven into the fiber and the resistance value changes according to the application of an external force. The frequency applying unit is a high frequency applying unit for measuring impedance by repeatedly applying a first frequency to the fiber type sensor, and a low frequency for measuring impedance by repeatedly applying a second frequency lower than the first frequency to the fiber type sensor. Includes an authorization unit. The impedance comparison unit compares the impedance measured by the high frequency application unit. When the impedance values compared by the impedance comparison unit are different, the output unit calculates and outputs the magnitude of the external force based on the difference in impedance measured by the low-frequency application unit.

Description

Fiber-type sensing system capable of correcting unrestored condition and its driving method {FLEXIBLE PRESSURE MEASURING SYSTEM AND LARGE-SIZED TEXTILE HAVING THE SAME}

The present invention relates to a fiber-type sensing system and a method for driving the same, and more specifically, when a resistance is changed due to a physical deformation, the fiber-type sensing system that senses it is corrected by correcting it when an unrestored state occurs due to the characteristics of the fiber. The present invention relates to a fiber-type sensing system capable of correcting an unrestored state capable of detecting a signal and a driving method thereof.

As shown in Figures 1a and 1b, in the case of a conventional fiber-type resistance sensor, when an external force is applied along the extending direction of the fiber, or when an external force is applied in a direction perpendicular to the fiber, the length of the sensor or the sensor of the internal sensor It is characterized in that a change in resistance occurs as the thickness changes, and the magnitude of the external force can be measured. In the case of such a fiber-type resistance sensor, various technologies have been developed, including Korean Patent Publication No. 10-2017-0060527.

However, in the case of an actual fiber-type resistance sensor, when a repetitive tensile force or compressive force is applied due to the characteristics of the fiber, a phenomenon such as the shape being deformed and not being restored to the original shape or the restoration speed is slowed down occurs.

However, in the case of the fiber-type resistance sensor, the magnitude of the external force is measured based on the resistance value between the initial state and the deformed state. When the actual fiber is not restored in its original form or the restoration speed is slow, the correct signal is detected. This is difficult, or a problem in which the dynamic range of the measurable sensor decreases is caused, resulting in a decrease in the reliability of the overall resistance sensor.

That is, as shown in FIG. 2A, ideally, in the case of a fiber-type resistance sensor, a change in resistance should be kept constant between a standby state and a normal state to which an external force is applied, but as shown in FIG. 2B, in practice, Due to repeated compression and deformation of the fiber due to tension, an offset in the atmospheric state occurs, and accordingly, a difference between the resistance value in the atmospheric state and the steady state state as well as the resistance value changes.

However, until now, a technique for correcting a measurement value or improving the accuracy of the measurement value has not been proposed in consideration of the characteristics of the fiber-type resistance sensor.

Republic of Korea Patent Publication No. 10-2017-0060527

Accordingly, the technical problem of the present invention was conceived in this regard, and the object of the present invention is to correct the uncorrected state due to the characteristics of the fiber in the fiber-type sensing system that senses it by changing the resistance due to physical deformation. It relates to a fiber-type sensing system capable of correcting an unrestored state capable of detecting a signal.

In addition, another object of the present invention relates to a method of driving the fiber-type sensing system.

The fiber-type sensing system according to an embodiment for realizing the object of the present invention includes a fiber-type sensor, a frequency applying unit, an impedance comparison unit, and an output unit. The fiber-type sensor is woven into the fiber and the resistance value changes according to the application of an external force. The frequency applying unit is a high frequency applying unit for measuring impedance by repeatedly applying a first frequency to the fiber type sensor, and a low frequency for measuring impedance by repeatedly applying a second frequency lower than the first frequency to the fiber type sensor. Includes an authorization unit. The impedance comparison unit compares the impedance measured by the high frequency application unit. When the impedance values compared in the impedance comparison unit are different, the output unit outputs a difference in impedance measured by the low frequency application unit.

In one embodiment, the impedance measured by the high frequency applying unit and the impedance measured by the low frequency applying unit may be stored, and may further include an impedance storage unit provided to the impedance comparison unit and the output unit, respectively.

In one embodiment, the first frequency is a frequency in the range of several MHz, and the second frequency can be a frequency in the range of several kHz to hundreds of kHz.

In one embodiment, when the impedance measured by the low frequency applying unit is different from the impedance previously measured by the high frequency applying unit, the impedance is measured by reapplying a second frequency to the fiber type sensor. Can be.

In one embodiment, the output unit may output a difference between the impedance measured by applying the second frequency again from the low-frequency applying unit and the impedance previously measured by the low-frequency applying unit.

In one embodiment, an application part capacitance Cbody that changes according to an external force is formed between the application part to which an external force is applied and the fiber-type sensor, and the application part capacitance Cbody changes as the external force is changed. The resistance value (Rsensor) of the fiber type sensor may be changed.

In one embodiment, as the external force is applied, the impedance output according to the application of the first frequency decreases, and the impedance output according to the application of the second frequency can increase.

In one embodiment, the applying unit may be a part of the body.

In the driving method of the fibrous sensing system according to an embodiment for realizing another object of the present invention, the impedance is applied by applying a first frequency to a fibrous sensor that is woven into a fiber and whose resistance value changes according to the application of an external force. Measure. Impedance is measured by applying a second frequency lower than the first frequency to the fiber type sensor. The impedance is measured by applying the first frequency to the fiber type sensor again. The impedance measured according to the application of the first frequency is compared with each other. When the impedance measured according to the application of the first frequency is different, the impedance is measured by applying the second frequency to the fiber-type sensor again. The difference in impedance measured according to the application of the second frequency is output.

In one embodiment, the first frequency is a frequency in the range of several MHz, and the second frequency can be a frequency in the range of several kHz to hundreds of kHz.

In one embodiment, when the impedances measured according to the application of the first frequency are the same, the impedance may be measured by periodically applying the first frequency until the measured impedances are different.

According to embodiments of the present invention, in a fiber-type sensing system, when an unrestored state occurs or a restoration proceeds slowly due to characteristics of a fiber, a more accurate signal can be detected by discriminating and correcting it, thereby enabling more accurate external force information. Can be obtained.

That is, in the normal state in which the external force is applied in contrast to the standby state in which the external force is not applied, the impedance according to the application of the high frequency is reduced by using the phenomenon in which the impedance according to the application of the high frequency decreases. By measuring the amount of change, it is possible to obtain the amount of deformation, that is, the applied amount of external force. Thus, in the case of unrestored, it is possible to solve a problem of not recognizing an accurate external force application point according to an increase in resistance value in the standby state, that is, an offset phenomenon.

In particular, when a part of the body applies an external force to the fiber-type sensor as an application portion, the applied portion capacitance (Cbody) between the application portion and the fiber-type sensor, which is a relatively large value compared to other capacitances, changes and As a result, the resistance value (Rsensor) of the fiber-type sensor changes, which is measured by the impedance change according to the application of high frequency, so it is possible to determine the moment when an external force is applied. As a result, information on the amount of external force applied can be obtained.

To this end, whether the impedance change due to the application of the high frequency is continuously detected, and when the change in the impedance is measured, the impedance change through the application of the low frequency in the standby state and the normal state can be measured by measuring the impedance through the application of the low frequency. Thereby, it is possible to measure the resistance value change of the fiber type sensor immediately.

Thus, it is possible to immediately grasp the point of application of the external force even in the state of not restoring the fiber, etc., and to measure the change in the resistance value accordingly, thereby easily and accurately obtaining the applied amount information of the external force.

Figure 1a is an example showing a case in which the horizontal tension force is applied to the fiber-type resistance sensor according to the prior art, Figure 1b is an example showing a case in which the vertical compression force is applied to the fiber-type resistance sensor according to the prior art.
2A is a graph showing a change in resistance measured from an ideal fiber-type resistance sensor when a repetitive external force is applied, and FIG. 2B is a graph showing a change in resistance measured from a real fiber-type resistance sensor when a repetitive external force is applied. to be.
3 is a schematic diagram showing a fibrous sensing system according to an embodiment of the present invention, and FIG. 4 is a circuit diagram simulating the fibrous sensing system of FIG. 3.
FIG. 5 is a block diagram showing the fiber-type sensing system of FIG. 3.
6 is a graph schematically illustrating a change in output impedance as a frequency of a high frequency and a low frequency range is applied to the fiber-type sensing system of FIG. 3.
7 is a graph showing a change in the output impedance as the actual frequency is applied to the fiber-type sensing system of FIG. 3, FIG. 8A is a graph showing an enlarged area 'A' of FIG. 7, and FIG. 8B is a view of FIG. This is an enlarged graph of the 'B' area of 7.
9 is a flowchart illustrating a method of driving the fiber-type sensing system of FIG. 3.

The present invention can be applied to various changes and can have various forms, and the embodiments are described in detail in the text. However, this is not intended to limit the present invention to a specific disclosure form, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In describing each drawing, similar reference numerals are used for similar components. Terms such as first and second may be used to describe various components, but the components should not be limited by the terms.

The terms are used only for the purpose of distinguishing one component from other components. The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

In this application, terms such as “comprise” or “consist of” are intended to indicate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, and that one or more other features are present. It should be understood that the existence or addition possibilities of fields or numbers, steps, actions, components, parts or combinations thereof are not excluded in advance.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person skilled in the art to which the present invention pertains. Terms such as those defined in a commonly used dictionary should be interpreted as having meanings consistent with meanings in the context of related technologies, and should not be interpreted as ideal or excessively formal meanings unless explicitly defined in the present application. Does not.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2A is a graph showing a change in resistance measured from an ideal fiber-type resistance sensor when a repetitive external force is applied, and FIG. 2B is a graph showing a change in resistance measured from a real fiber-type resistance sensor when a repetitive external force is applied. to be.

Referring to Figure 2a, the resistance measured from the fiber-type resistance sensor is maintained relatively low in the standby state where no external force is applied, but in the normal state in which the external force is applied, the fiber tissue is deformed according to the application of the external force. Accordingly, the resistance measured from the fiber-type resistance sensor increases. Therefore, in such a fiber-type resistance sensor, it is possible to derive the magnitude of the external force based on the amount of change in resistance measured in the atmospheric state and in the normal state.

However, as shown in FIG. 2B, in the case of the fiber-type resistance sensor, it may not be restored to its original state due to repeated application of external force, or the recovery may be delayed to maintain an unrestored state. As described above, when the fiber-type resistance sensor maintains a non-restored state, the fiber tissue maintains a deformed state, so that the resistance value measured even in an atmospheric state where no external force is applied increases from the initial resistance value. An error occurs in which external power is judged to be applied.

Of course, it is possible to derive the magnitude of the external force based on the difference between the resistance value when the external force is applied and the resistance value when the external force is not applied even in the unrestored state, but the initial resistance value increases, that is, the resistance in the standby state Since the value is increased by the offset, it is not easy to accurately determine the point at which an external force is applied.

Therefore, the fiber-type sensing system in the present embodiment and its driving method are capable of deriving an accurate external force by correcting even when an unrestored state occurs, by determining when the external force is accurately applied even in the unrestored state. Hereinafter, the fibrous sensing system 10 will be described first.

3 is a schematic diagram showing a fibrous sensing system according to an embodiment of the present invention, and FIG. 4 is a circuit diagram simulating the fibrous sensing system of FIG. 3. FIG. 5 is a block diagram showing the fiber-type sensing system of FIG. 3.

3 to 5, the fibrous sensing system 10 according to the present embodiment includes a fibrous sensor 100 and a measurement module 300.

In this case, an external force is applied to the fiber-shaped sensor 100 by an application unit 200. In FIG. 3, the application unit 200 provides compression force in a vertical direction with respect to the fiber-type sensor 100. Although shown, unlike this, the applying unit 200 may provide a tensile force or a compressive force in the horizontal direction to the fiber-type sensor 100, and the applied external force may be variously varied.

The fiber-type sensor 100 is woven into a fiber, and the resistance value changes as an external force is applied. Conductive conductive yarns are simultaneously woven to a fiber or fabric, or conductive conductive yarns are manufactured in the form of fibers or fabrics to be woven only with conductive conductive yarns. It may be, or may be formed of a fiber material having conductivity in various forms. Accordingly, the user can wear it on the body, such as a fiber or fabric, and since it has a conductive property, it is possible to measure resistance, current, or voltage.

In this embodiment, the fiber-type sensor 100 is not limited in form or type if it is a conductive fiber or textile product.

The applying unit 200 may be a part of various bodies, such as hands and feet.

On the other hand, the fiber-type sensor 100 has a resistance value (Rsensor), the measurement module 300 when the external force is applied to the fiber-type sensor 100 by the application unit 200, the fiber-type sensor The external force of the applying unit 200 is derived by measuring a change in the resistance value (Rsensor) of (100).

However, when an external force is actually applied to the fiber-shaped sensor 100 by the application unit 200, as shown in FIG. 3, in addition to the resistance value (Rsensor) of the fiber-type sensor 100, the fiber In the type sensing system 10, there is a resistance value (Rline) of the wiring between the fiber-type sensor 100 and the measurement module 300, in addition to the resistance value, the capacitance of the wiring (Cline), The capacitance (Csensor) of the fiber-type sensor 100 and the applied portion capacitance (Cbody) between the application unit 200 and the fiber-type sensor 100 is present. In this case, the applied part capacitance (Cbody) is present in the nature of the body, especially when the applied part 200 is a part of the body.

The fibrous sensing system 10 may be simulated as a circuit diagram as shown in FIG. 4. However, since the resistance value Rsensor of the fiber-type sensor 100 in the fiber-type sensing system 10 is actually larger than the resistance value Rline of the wiring, the resistance value Rline of the wiring is negligible. Can be.

In addition, when defining the capacitance (Cline) of the wiring, the capacitance (Csensor) of the fiber-type sensor 100 and the applied part capacitance (Cbody) to define a parasitic capacitance (Cparasitic), The capacitance (Cline) of the wiring and the capacitance (Csensor) of the fiber-type sensor are maintained at a constant value, and only the applied portion capacitance (Cbody) is applied to the fiber-shaped sensor through the applying portion (200). It becomes variable as an external force is applied to (100). That is, the factor that changes the parasitic capacitance Cparasitic is only the applied portion capacitance Cbody.

On the other hand, the measurement module 300 measures the change in impedance of the fiber-type sensing system 10 according to the application of an external force through the application unit 200, and whether or not the external force of the application unit 200 is applied and In order to derive the magnitude of the external force, in this case, when the external force is applied through the applying unit 200, only the resistance value (Rsensor) of the fiber-type sensor 100 and the applying unit capacitance (Cbody) are varied. Based on the change in impedance, it is possible to derive whether the external force is applied and the magnitude of the external force.

More specifically, the measurement module 300 includes a frequency applying unit 300, an impedance storage unit 320, an impedance comparison unit 330 and an output unit 340.

The frequency applying unit 300 includes a high frequency applying unit 311 applying a first frequency to the fiber-type sensor 100 and a low frequency applying unit 312 applying a second frequency, in this case, the first One frequency may be a relatively high frequency greater than the second frequency.

For example, the first frequency may be a frequency in the range of several MHz, and the second frequency may be a frequency in the range of several kHz to hundreds of kHz. In this case, since the first frequency is higher than the second frequency, the frequency corresponding to the first frequency is also referred to as high frequency, and the frequency corresponding to the second frequency is also referred to as low frequency.

The high frequency applying unit 311 measures impedance by repeatedly applying a first frequency to the fiber type sensor 100, and the measured impedance is stored in the impedance storage unit 320.

In this case, the high frequency applying unit 311 repeatedly applies the first frequency to measure the impedance accordingly, but when the value of the impedance is detected to change, the application of the additional frequency is stopped.

In this case, the impedance comparison unit 330 compares the impedances stored in the impedance storage unit 320, measured according to a first frequency repeatedly applied by the high frequency application unit 311, and the impedance value is changed. When it is judged, the application of the frequency of the high frequency application unit 311 is stopped.

Meanwhile, the low-frequency applying unit 312 also repeatedly applies a second frequency to the fiber-type sensor 100 to measure impedance, and the measured impedance is stored in the impedance storage unit 320.

Likewise, the second frequency is repeatedly applied to the low frequency applying unit 312 to measure the impedance accordingly. However, in the low frequency applying unit 312, after measuring the impedance once by applying the second frequency to the fiber-type sensor 100 once in the initial state, the first frequency in the impedance comparison unit 330 When it is determined that impedances measured according to application of are different from each other, that is, an impedance value is changed, an impedance is measured by applying the second frequency to the fiber-type sensor 100.

Thus, the impedance comparison unit 330 compares the impedances measured for the second frequency repeatedly provided by the low-frequency application unit 312, and provides the result to the output unit 340.

Impedance output values according to the application of the second frequency thus derived are provided to the output unit 340, and the output unit 340 measures impedances measured for the second frequency repeatedly provided by the low frequency application unit 312. The change value, that is, the difference in impedance is output to the outside.

In this case, the output unit 340 may derive and output the magnitude of the external force based on the change value of the impedance. In this case, the algorithm for deriving the magnitude of the external force is omitted in detail. It is obvious that it can be implemented through a separate simulation or database.

Alternatively, the magnitude of the external force may be derived through a separate calculation unit (not shown) based on information on the change value of the impedances output from the output unit 340 according to an embodiment.

On the other hand, in this embodiment, only when it is determined that the impedances measured according to the first frequency applied from the high frequency applying unit 311 are different from each other, the low frequency applying unit 312 again applies a second frequency to adjust the impedance. It has been described that the external force is derived based on the difference in impedance according to the measurement and the repeated application of the second frequency. The reason for this will be described later with reference to FIGS. 6 to 8B.

6 is a graph schematically illustrating a change in output impedance as a frequency of a high frequency and a low frequency range is applied to the fiber-type sensing system of FIG. 3. 7 is a graph showing a change in impedance output as the actual frequency is applied to the fiber-type sensing system of FIG. 3, FIG. 8A is a graph showing an enlarged area 'A' of FIG. 7, and FIG. 8B is a view of FIG. This is an enlarged graph of the 'B' area of 7.

First, referring to FIG. 6, as a standby state, that is, a state in which an external force is not applied to the fiber-type sensor 100, is switched to a normal state, that is, a state in which an external force is applied to the fiber-type sensor 100 , In the fibrous sensing system 10 according to the present embodiment, it can be confirmed that the impedance decreases in the high frequency range, that is, the first frequency range, and the impedance increases in the low frequency range, that is, the second frequency range. have.

This is also confirmed through a change in impedance measured while applying an external force to the actual fiber-like sensor 100 of FIGS. 7 to 8B. As shown in FIG. 8B, the impedance decreases with the application of an external force in the high frequency region. As shown in FIG. 8A, it can be seen that the impedance increases in response to the application of an external force in the low frequency region.

As described above, in the fibrous sensing system 10 in the present embodiment, since the decrease and increase in impedance in the high and low frequency regions occur according to the application of external force, first, the first frequency belonging to the high frequency region is recalled. When the impedance measured by applying to the fiber-type sensor 100 senses a change, that is, the impedance value decreases, it can be confirmed that the application of the external force starts.

Thus, when the application point of the external force is grasped, the second frequency belonging to the low frequency region is applied again to the fiber-shaped sensor 100, and the impedance and the second frequency previously measured according to the application of the second frequency are applied. The difference in impedance measured according to the re-application is output, and the magnitude of the external force actually applied can be detected based on this.

9 is a flowchart illustrating a method of driving the fiber-type sensing system of FIG. 3.

Referring to FIG. 9, in the driving method of the fiber-type sensing system 10 according to the present embodiment described above, first, for an initial state in which no external force is applied, the high-frequency applying unit 311 is the fiber-type sensor The first frequency is applied to (100), and the first impedance is measured (step S10). The measured first impedance is stored in the impedance storage unit 320 (step S11).

Thereafter, with respect to the initial state, the low-frequency applying unit 312 also applies the second frequency to the fiber-type sensor 100, and measures the second impedance (step S20). In addition, the measured second impedance is stored in the impedance storage unit 320 (step S21).

As described above, when the first and second impedances are stored for the initial state, information about the stored first and second impedances may be provided to the impedance comparison unit 330.

Thereafter, the high frequency applying unit 311 applies the first frequency to the fiber-like sensor 100 again, and measures the third impedance (step S30). In addition, the measured third impedance is stored in the impedance storage unit 320 (step S31).

Meanwhile, as described above, a state in which the third impedance is measured is a state in which the applying unit 200 can apply an external force to the fiber-type sensor 100, and the actual applying unit 200 is applied to the fiber-type sensor ( 100) It is necessary to judge whether an external force is applied (normal state) or not (standby state).

Accordingly, the impedance comparison unit 330 compares whether the third impedance and the first impedance previously stored in the impedance storage unit 320 are equal to each other (step S40).

In this case, if it is determined that the third impedance is the same as the first impedance, the applying unit 200 is determined to be in a state in which no external force is applied to the fiber-shaped sensor 100, that is, a standby state. In addition, when it is determined that the standby state is as described above, the high frequency applying unit 311 repeatedly applies a first frequency to the fiber type sensor 100 to measure the impedance accordingly, and updates the third impedance (step) S30), the updated third impedance is stored again in the impedance storage unit 320 (step S31).

The impedance comparison unit 330 compares the first impedance again with respect to the stored third impedance to determine whether it is the same, and if it is determined that the same, the high frequency applying unit 311 applies the first frequency again. Accordingly, the output impedance is updated and stored as a third impedance.

That is, when the third impedance is the same as the first impedance, the standby state continues, and the high frequency applying unit 311 repeatedly provides the first frequency to the fiber-type sensor 100, thereby Accordingly, the third impedance is measured repeatedly.

 Alternatively, if it is determined that the third impedance updated and stored in the impedance storage unit 320 is different from the first impedance that is the impedance in the initial state (step S40), the applicator 200 is the fiber-type sensor 100 ) Is judged to be in a state in which external force is applied, that is, in a normal state.

Thus, if it is determined to be in such a normal state, the low frequency applying unit 312 applies a second frequency to the fiber-like sensor 100 again to measure the fourth impedance accordingly (step S50), and thus measured The fourth impedance is stored in the impedance storage unit 320 (step S51).

Thereafter, the impedance comparison unit 330 compares the difference between the fourth impedance and the second impedance, and a difference between the fourth impedance and the second impedance is output through the output unit 340 (step) S60).

In this case, as described above, the output unit 340 derives the magnitude of the external force applied from the applying unit 200 through a separate algorithm based on the difference between the fourth impedance and the second impedance. Alternatively, the magnitude of the external force may be calculated through a separate calculation unit.

According to the embodiments of the present invention as described above, in the fiber-type sensing system, when an unrestored state occurs or the restoration proceeds slowly due to the characteristics of the fiber, a more accurate signal can be detected by discriminating and correcting it. Accurate external force information can be obtained.

That is, in the normal state in which the external force is applied in contrast to the standby state in which the external force is not applied, the impedance according to the application of the high frequency is reduced by using the phenomenon in which the impedance according to the application of the high frequency decreases. By measuring the amount of change, it is possible to obtain the amount of deformation, that is, the applied amount of external force. Thus, in the case of unrestored, it is possible to solve a problem of not recognizing an accurate external force application point according to an increase in resistance value in the standby state, that is, an offset phenomenon.

In particular, when a part of the body applies an external force to the fiber-type sensor as an application portion, the applied portion capacitance (Cbody) between the application portion and the fiber-type sensor, which is a relatively large value compared to other capacitances, changes and As a result, the resistance value (Rsensor) of the fiber-type sensor changes, which is measured by the impedance change according to the application of high frequency, so it is possible to determine the moment when an external force is applied. As a result, information on the amount of external force applied can be obtained.

To this end, whether the impedance change due to the application of high frequency is continuously detected, and when the change in impedance is measured, the impedance is measured through the application of low frequency to measure the impedance change due to the application of low frequency in the standby state and in the normal state. Thereby, it is possible to measure the resistance value change of the fiber type sensor immediately.

Thus, it is possible to immediately grasp the point of application of the external force even in the state of not restoring the fiber, etc., and to measure the change in the resistance value accordingly, thereby easily and accurately obtaining the applied amount information of the external force.

Although described above with reference to the preferred embodiments of the present invention, those skilled in the art may variously modify and change the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. You will understand that you can.

10: Fiber type sensing system
100: fiber-type sensor 200: application unit
300: measurement module 310: frequency application unit
311: high frequency applying unit 312: low frequency applying unit
320: impedance storage unit 330: impedance comparison unit
340: output unit

Claims (11)

Fiber-type sensor that is woven into the fiber and the resistance value changes with the application of an external force;
A high frequency application unit for measuring impedance by repeatedly applying a first frequency that is a frequency in the range of several MHz to the fiber type sensor, and a second frequency that is in the range of several kHz to hundreds of kHz lower than the first frequency to the fiber type sensor. A frequency application unit including a low-frequency application unit for measuring impedance by repeatedly applying a frequency;
An impedance comparison unit that compares the impedance measured by the high frequency application unit; And
When the compared impedance values are different, including an output unit for outputting a difference in impedance measured by the low-frequency applying unit,
When the external force is applied, the impedance output according to the application of the first frequency decreases, and the impedance output according to the application of the second frequency increases,
When the impedance measured by the high frequency applying unit is different from the impedance previously measured by the high frequency applying unit, the low frequency applying unit measures impedance by applying a second frequency to the fiber-type sensor again,
The output unit, the fiber-type sensing system, characterized in that for outputting a difference between the impedance measured by applying the second frequency again from the low-frequency applying unit, the impedance previously measured by the low-frequency applying unit. According to claim 1,
A fiber-type sensing system further comprising an impedance storage unit that stores the impedance measured by the high frequency application unit and the impedance measured by the low frequency application unit, and provides the impedance comparison unit and the output unit respectively. delete delete delete According to claim 1,
Between the application part to which an external force is applied and the fiber-type sensor, an application part capacitance (Cbody) that changes according to an external force is formed,
A fiber-type sensing system characterized in that the resistance value (Rsensor) of the fiber-type sensor changes as the applied part capacitance (Cbody) changes. delete The method of claim 6, wherein the applying unit,
A fibrous sensing system characterized by being part of the body. Measuring impedance by applying a first frequency, which is a frequency in the range of several MHz, to a fiber-type sensor that is woven into a fiber and whose resistance value changes according to the application of an external force;
Measuring an impedance by applying a second frequency that is a frequency in the range of several kHz to several hundreds of kHz lower than the first frequency to the fiber-type sensor;
Measuring the impedance by applying the first frequency to the fiber-type sensor again by the high frequency applying unit;
Comparing impedances measured according to the application of the first frequency to each other;
When the impedance measured according to the application of the first frequency at the high frequency application unit is different from the impedance previously measured at the high frequency application unit, the low frequency application unit applies the second frequency to the fiber-type sensor again to increase the impedance. Measuring; And
And outputting a difference between an impedance measured according to the application of the second frequency again from the low-frequency applying unit and an impedance previously measured by the low-frequency applying unit,
When the external force is applied, the impedance output according to the application of the first frequency decreases, and the impedance output according to the application of the second frequency increases. delete The method of claim 9,
When the impedances measured according to the application of the first frequency are the same, the method for driving the fiber-type sensing system is characterized in that the impedances are measured by periodically applying the first frequency until the measured impedances are different. .

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