Information communication terminal and displacement management system

Abstract

To provide an information communication terminal and a displacement management system capable of easily detecting a structural problem which is difficult to find by visual observation or simple measurement, being repeatedly used, and appropriately detecting a displacement amount.SOLUTION: The RFID tag (information communication terminal) 10 includes the variable capacitor 200 that is a capacitor formed of the first electrodes 210 disposed on the first base material 110 and on the sliding surface on which the first base material 110 and the second base material 120 slide, and the second electrodes 220 disposed on the sliding surface on the second base material 120, and has a capacitance that changes with a change in area based on the sliding of the regions where the first electrodes 210 and the second electrodes 220 face each other. The first electrode 210 and the second electrode 220 are formed along a sliding direction indicating a sliding direction.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to an information communication terminal device and a displacement management system. [Background technology]

[0002] BACKGROUND ART Concrete has been widely used in structures such as bridges for roads and railways, tunnels, and buildings.

[0003] Furthermore, it is known that structures made of these concretes will develop cracks due to temperature, humidity, or external forces when used for a long period of time. If these cracks are left unchecked, they may lead to serious accidents due to the peeling of walls or the progression of corrosion of internal reinforcing bars, so they must be inspected and maintained regularly.

[0004] Recently, inexpensive RFID tags for detecting cracks have become known that can reliably detect the presence or absence of such cracks (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2019-164396 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the RFID tag described in Patent Document 1 has a structure in which the internal electrical wires are cut off in response to cracks, making it impossible to use repeatedly and sometimes making it impossible to properly detect the amount of displacement.

[0007] The present invention has been made to solve the above-mentioned problems, and aims to provide an information and communication terminal device and a displacement management system that can easily detect structural problems that are difficult to find by visual inspection or simple measurement, that can be used repeatedly, and that can properly detect the amount of displacement. [Means for solving the problem]

[0008] (1) In order to solve the above problems, the present invention provides: a first substrate fixedly installed at a first reference position of a first object; a substrate fixedly installed at a second reference position different from the first reference position, or a substrate fixedly installed at a second reference position indicating a given position of a second object different from the first object, the second substrate being installed separately and independently from the first substrate and facing the first substrate; a sliding means for sliding at least one of the first substrate and the second substrate in accordance with displacement of the first reference position and the second reference position while maintaining the first substrate and the second substrate facing each other; a variable capacitor formed from a first electrode disposed on a sliding surface on the first substrate along which the first substrate and the second substrate slide, and a second electrode disposed on a sliding surface on the second substrate, the capacitance of which changes with an area change due to the sliding of opposing regions of the first electrode and the second electrode; a transmitting means formed on either the first substrate or the second substrate, for transmitting, as change information, information indicating a change in capacitance of the variable capacitor caused by sliding between the first substrate and the second substrate; Equipped with The first electrode and the second electrode are configured to be formed along a sliding direction that indicates a sliding direction.

[0009] With this configuration, the present invention can output information on the change in the capacitance of the capacitor to the outside when the distance between two points on the same object or the distance between two points on two objects changes, making it possible to easily detect structural problems that are difficult to detect by visual inspection or simple measurement, such as cracks or fissures in a structure or the inclination of the structure, and it can also be used repeatedly and properly detect the amount of displacement.

[0010] (2) The present invention also provides The transmitting means a transmission circuit electrically connected to the variable capacitor; The sliding means is a contact structure that maintains an electrical connection between the variable capacitor and the transmission circuit during the sliding movement; a guide rail that restricts sliding of the first base material and the second base material in the sliding direction; It has a configuration that is composed of.

[0011] With this configuration, the present invention can maintain the electrical connection between the variable capacitor and the transmission circuit without breaking the electrical connection between them even when the first substrate and the second substrate are slid.

[0012] (3) The present invention also provides a second capacitor electrically connected in series with the first capacitor representing the variable capacitor; The second capacitor is a first electrode disposed on the sliding surface of the second substrate, and a second electrode disposed on the sliding surface of the first substrate; The structure functions as a variable capacitor whose capacitance changes in accordance with the change in area due to the sliding of the opposing regions of the first electrode and the second electrode.

[0013] With this configuration, the present invention can electrically connect the variable capacitor and the transmission circuit without physically connecting them when the first substrate and the second substrate slide together, so the connection point between the variable capacitor and the transmission circuit within the sliding range can be configured without having to be strictly designed.

[0014] (4) The present invention also provides The second electrode of the first capacitor and the first electrode of the second capacitor are integrally formed.

[0015] With this configuration, the present invention can reduce the number of parts, making it easier and cheaper to manufacture, and it also allows for more leeway in the sliding direction, making it possible to properly detect structural defects that are difficult to predict, such as cracks or fissures in the structure or tilt of the structure.

[0016] (5) The present invention also provides a displacement measurement point for measuring the displacement of the first object between the first reference position and the second reference position along the sliding direction, or a displacement measurement point for measuring the displacement of the first object between the first reference position and the second reference position along the sliding direction; The second object has a boundary formed thereon.

[0017] (6) The present invention also provides The device has a configuration in which markings that are visible from the outside and that allow the amount of movement when slid in the sliding direction to be visible are formed on the first substrate and at least one of the second substrate or the portion where the second substrate is installed.

[0018] With this configuration, the present invention makes it possible to visually confirm the change in the distance between two points on the same object or the change in the distance between two points on two objects.

[0019] In addition, "formed on the second substrate or the part where the second substrate is installed" means that the marking may be formed on the second substrate itself, or may be formed on a part such as a housing on which the second substrate is formed.

[0020] Furthermore, the "marking" may be anything that allows the distance between two points on the same object or the distance between two points on two objects to be visually recognized.

[0021] For example, the marking formed on either the first substrate or the second substrate (including the formed portion) may be a marking that allows the distance from a predetermined sliding start position to be visually recognized, or the marking formed on both the first substrate and the second substrate (including the formed portion) may be a marking that aligns both substrates at the start of sliding.

[0022] (7) In order to solve the above problems, the present invention provides: a first substrate fixedly installed on a first object; a second substrate, which is a substrate fixedly installed on the first object at a second reference position different from the first reference position independently of the first substrate, or a substrate fixedly installed at a second reference position indicating a given position of a second object different from the first object; a substrate fixedly installed on the first object or the second object at a third reference position different from the first reference position and the second reference position, separate and independent from the second substrate, or a substrate fixedly installed at a third reference position indicating a given position of a third object different from the first object and the second object, the third substrate being fixedly installed opposite the first substrate and the second substrate; a sliding means for sliding the first substrate, the second substrate, and the third substrate in a first direction and a second direction different from the first direction while maintaining the first substrate, the second substrate, and the third substrate facing each other, respectively; a first capacitor circuit whose capacitance changes with sliding in the first direction; a second capacitor circuit whose capacitance changes in response to sliding in the second direction; a transmitting means for transmitting information indicating a change in capacitance of the first capacitor circuit and a change in capacitance of the second capacitor circuit as change information; Equipped with The first capacitor circuit is a variable capacitor for a first capacitor circuit, the variable capacitor comprising: a first electrode for a first capacitor circuit, the first electrode being disposed on the first substrate at a sliding surface along which the first substrate and the second substrate slide, and the second electrode for a first capacitor circuit being disposed on a sliding surface on the second substrate, the variable capacitor for a first capacitor circuit having a capacitance that changes in accordance with an area change due to sliding in the first direction of opposing regions of the first electrode for the first capacitor circuit and the second electrode for the first capacitor circuit; The second capacitor circuit is a first electrode for a second capacitor circuit that is disposed on the third substrate on a sliding surface where the second substrate and the third substrate slide and that is disposed along the second direction; and a second electrode for a second capacitor circuit that is disposed on the sliding surface of the substrate and that is disposed along the second direction, and the variable capacitor for the second capacitor circuit has a capacitance that changes in accordance with the change in area due to the sliding of the opposing regions of the first electrode for the second capacitor circuit and the second electrode for the second capacitor circuit.

[0023] With this configuration, the present invention can output two-dimensional position changes of the same object or two-dimensional position changes of two objects to the outside as information on changes in the capacitance of a capacitor, making it possible to easily detect structural problems that are difficult to detect by visual inspection or simple measurement, such as cracks or fissures in a structure or the inclination of the structure, and is also capable of being used repeatedly and properly detecting the amount of displacement.

[0024] (8) The present invention also provides The first capacitor circuit is Further, a second variable capacitor is electrically connected in series to the first variable capacitor representing the variable capacitor for the first capacitor circuit, The second variable capacitor a first electrode for a second variable capacitor disposed on the sliding surface of the second base material, and a second electrode for a second variable capacitor disposed on the sliding surface of the first base material, the first electrode for the second variable capacitor and the second electrode for the second variable capacitor function as a variable capacitor whose capacitance changes in accordance with the change in area due to the sliding of the opposing regions of the first electrode for the second variable capacitor and the second electrode for the second variable capacitor; The second capacitor circuit is Further, a fourth variable capacitor is electrically connected in series with the third variable capacitor representing the variable capacitor for the second capacitor circuit, The fourth variable capacitor a fourth variable capacitor first electrode disposed on the sliding surface of the second base material, and a fourth variable capacitor second electrode disposed on the sliding surface of the third base material, The fourth variable capacitor first electrode and the fourth variable capacitor second electrode have a configuration that functions as a variable capacitor whose capacitance changes in accordance with the change in area due to the sliding of the opposing regions.

[0025] With this configuration, the present invention can electrically connect the variable capacitor and the transmission circuit without physically connecting them when the first substrate and the second substrate, or the first substrate and the third substrate, slides, so that the connection points between the variable capacitor and the transmission circuit within the sliding range do not need to be strictly designed.

[0026] (9) The present invention also provides The second electrode for the first variable capacitor, the first electrode for the second variable capacitor, the second electrode for the third variable capacitor, and the first electrode for the fourth variable capacitor are integrally formed.

[0027] With this configuration, the present invention can reduce the number of parts, making it easier and cheaper to manufacture.

[0028] (10) The present invention also provides The transmitting means a transmission circuit electrically connected to the first capacitor circuit and the second capacitor circuit; The sliding means is When the sliding is performed in a first direction, the variable capacitor for the first capacitor circuit and the transmission circuit a first contact structure that maintains electrical connection with the path; a second contact structure that maintains an electrical connection between the variable capacitor for the second capacitor circuit and the transmission circuit when the variable capacitor for the second capacitor circuit slides in the second direction; a guide rail that restricts sliding of the first base material and the third base material in the first direction and the second direction, respectively; It has a configuration that is composed of.

[0029] (11) In order to solve the above problems, the present invention provides: a displacement detection processing device that receives change information transmitted from the information communication terminal device and detects a displacement between at least two base materials based on the received change information; The configuration includes:

[0030] With this configuration, the present invention can detect displacement between two or three substrates based on linear or two-dimensional positional changes in the same object, or linear or two-dimensional positional changes in two objects. This makes it possible to easily detect cracks or fissures in a structure, or structural problems such as the inclination of the structure that are difficult to detect by visual inspection or simple measurement, and the device can be used repeatedly and can appropriately detect the amount of displacement. [Brief explanation of the drawings]

[0031] [Figure 1] 3A and 3B are circuit layout diagrams (top and bottom surfaces) of a first substrate of the RFID tag of the first embodiment. [Figure 2] 4A and 4B are circuit layout diagrams (top and bottom surfaces) of a second substrate of the RFID tag according to the first embodiment. [Figure 3] 1 is a diagram (bottom view) showing the RFID tag in use in the first embodiment, in which the first base material and the second base material are fitted together. FIG. [Figure 4] 1 is a diagram (cross-sectional view) showing the RFID tag in use in the first embodiment, in which the first base material and the second base material are fitted together. [Figure 5] 3A and 3B are diagrams for explaining the principle of the variable capacitor of the RFID tag of the first embodiment and its relationship with displacement measurement points. [Figure 6] 10 is a graph showing the relationship between the capacitance of the variable capacitor of the RFID tag of the first embodiment and the displacement amount at the displacement meter side point. [Figure 7] 1 is a system configuration diagram showing the configuration of a displacement measurement system according to a first embodiment. [Figure 8] FIG. 2 is a functional block diagram showing the configuration of a communication circuit unit of the first embodiment. [Figure 9] 10 is a circuit layout diagram (top view) of a first substrate of an RFID tag according to a second embodiment. [Figure 10] 10 is a circuit layout diagram (bottom view) of a first substrate of an RFID tag according to a second embodiment. [Figure 11] 10A and 10B are circuit layout diagrams (top and bottom views) of a second substrate of an RFID tag according to a second embodiment. [Figure 12] 10A and 10B are diagrams for explaining the principle of a variable capacitor of an RFID tag according to a second embodiment. [Figure 13] 10 is a circuit layout diagram (top view) of a first substrate of an RFID tag according to a third embodiment. [Figure 14] 10 is a circuit layout diagram (bottom view) of a first substrate of an RFID tag according to a third embodiment. [Figure 15] 10A and 10B are circuit layout diagrams (top and bottom views) of a second substrate of an RFID tag according to a third embodiment. [Figure 16]11 is a diagram (bottom view) showing the RFID tag in use in a state in which the first base material and the second base material are fitted together in the third embodiment. FIG. [Figure 17] FIG. 10 is a diagram for explaining a modified example of the above embodiment, and is a usage state diagram (cross-sectional view) showing the usage state of an RFID tag when the first substrate and the second substrate are arranged on different objects. [Figure 18] FIG. 10 is a diagram for explaining a second modified example of the embodiment, and is a diagram for explaining a detection method when a plurality of RFID tags are used. [Figure 19] FIG. 10 is a diagram for explaining a third modification of the above embodiment, and is a circuit layout diagram (bottom view) on a first substrate of an RFID tag. [Figure 20] 13 is a diagram (bottom view) showing the RFID tag in a state where the first base material and the second base material are fitted together in a use state in Modification 3. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0032] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0033] The embodiments described below are embodiments in which the information communication terminal device and displacement management system of the present application are applied to an information communication system having an IC (Integrated Circuit) tag (hereinafter also referred to as an "RFID tag") for RFID (Radio Frequency Identification), which communicates with a reader / writer using wireless communication and reads and writes predetermined information by the reader / writer, and an information processing device that receives information (signals) transmitted from the RFID tag and executes predetermined information processing. However, the present application is not limited to the following embodiments within the scope of its technical concept.

[0034] In the following embodiments, an RFID tag that is fixed to a given object such as a wall of a building will be used for explanation.

[0035] [A] First embodiment [A1] RFID tag [A1.1] Overview and structure of RFID tags First, an overview and schematic configuration of an RFID tag 100 according to this embodiment will be described with reference to FIGS.

[0036] Note that Figure 1 is a circuit layout diagram (top and bottom surfaces) on the first substrate 110 of the RFID tag 100 of this embodiment, and Figure 2 is a circuit layout diagram (top and bottom surfaces) on the second substrate 120 of the RFID tag 100 of this embodiment.

[0037] 3 and 4 are diagrams (bottom views or cross-sectional views) showing the RFID tag 100 in use in this embodiment, with the first substrate 110 and the second substrate 120 fitted together.

[0038] The RFID tag 100 of this embodiment has a configuration that makes it possible to easily detect cracks or fissures in the same object (i.e., structure) such as a building (including a bridge or tunnel) constructed of concrete, or structural problems such as the inclination of the structure that are difficult to detect by visual inspection or simple measurement.

[0039] In particular, the RFID tag 100 of this embodiment has each circuit element disposed within a transparent housing B, and also has a structure for forming a variable capacitor 200.

[0040] Specifically, as shown in FIGS. 1 to 4, the RFID tag 100 of this embodiment includes a first substrate 110 fixedly installed at a first reference position P1 of a structure OB, and a second substrate 112 fixedly installed at a second reference position P2 different from the first reference position P1, and the second substrate 112 is fixedly installed on the structure OB separately from the first substrate 110 and facing the first substrate 110. 20, and a guide rail (male part) 131 and a guide race (female part) 141 as sliding means for sliding the first substrate 110, the second substrate 120, or both, in accordance with the displacement of the first reference position P1 and the second reference position P2 while maintaining the opposing state of the first substrate 110 and the second substrate 120.

[0041] As shown in FIGS. 1 to 4, the RFID tag 100 of this embodiment is a capacitor formed from a first electrode 210 arranged on the sliding surface on the first substrate 110 where the first substrate 110 and the second substrate 120 slide, and a second electrode 220 arranged on the sliding surface on the second substrate 120, and is equipped with a variable capacitor 200 whose capacitance changes in accordance with the change in area due to the sliding of the opposing regions of the first electrode 210 and the second electrode 220.

[0042] Furthermore, as shown in Figures 1 to 4, the RFID tag 100 of this embodiment is equipped with a communication circuit unit 300 that transmits information indicating a change in the capacitance of the variable capacitor 200 due to sliding between the first substrate 110 and the second substrate 120 as change information.

[0043] As shown in FIGS. 1 to 4, the first electrode 210 and the second electrode 220 constituting the variable capacitor 200 of this embodiment are configured to be formed along the sliding direction indicating the sliding direction.

[0044] In addition to the above, the RFID tag 100 of this embodiment has a contact structure that maintains the electrical connection between the variable capacitor 200 and the communication circuit section 300 during sliding, as shown in FIGS.

[0045] With this configuration, the RFID tag 100 of this embodiment can output information on the change in the capacitance of the capacitor to the outside when the distance between two points on the structure OB changes, making it possible to easily detect structural problems that are difficult to detect by visual inspection or simple measurement, such as cracks or fissures in the structure OB or the inclination of the structure OB, and it is also capable of being used repeatedly and of properly detecting the amount of displacement.

[0046] [A1.2] RFID tag configuration Next, the configuration of the RFID tag 100 of this embodiment will be described in detail.

[0047] The first base material 110 is not particularly limited as long as it is an insulating base material, and for example, a glass base material, a resin base material, a plastic film, or paper can be used.

[0048] Furthermore, the first substrate 110 is fixed at a first reference position P1 of the structure OB by a screw, nail or other fixing member 30 at an end 112 opposite to an end 111 that is fitted into the transparent housing B on which the second substrate 120 is formed, as shown in Figures 3 and 4.

[0049] That is, the first substrate 110 is installed along the sliding direction as shown in Figures 3 and 4, and the second substrate 120 is installed so that a displacement measurement point T for measuring the displacement of the structure OB is located between the second reference position P2 and the first reference position P1 as described below.

[0050] Instead of the fixing member 30, the first base material 110 may be fixed by a double-sided tape or a given adhesive.

[0051] The first base material 110 is, for example, 35 mm long and 56 mm wide (length in the sliding direction), and at least a part of the communication circuit unit 300 is formed on both the top and bottom surfaces. The area where the IC 310 is formed (for example, the area where the IC 310 is formed), the connection terminal 113, and the stationary electrode 124 are avoided, and the area is covered with a protective film (resist) whose main component is resin or the like.

[0052] As shown in Figures 1 to 4, on the upper surface of the first base material 110, a communication circuit section 300 is provided together with a protective film, and is formed from an IC 310, an antenna 320, and an element for the antenna 320 (hereinafter referred to as the "antenna element") 330.

[0053] The communication circuit unit 300 may be provided under or on the protective film, but is preferably covered with the protective film from the viewpoint of rust prevention.

[0054] 1 and 2, a marking 400 is formed (e.g., printed) on the protective film on the upper surface of the first substrate 110, which is visible from the outside and allows the amount of movement when sliding in the sliding direction to be visible, and which is used for alignment with the marking M formed on the transparent housing B.

[0055] In this embodiment, the markings are formed on both the first substrate 110 side and the second substrate 120 side, but the markings may be formed on either the first substrate 110 or the second substrate 120 (including the portion where they are formed).

[0056] That is, the marking of this embodiment may be any marking that allows the distance between two points on the same object to be visually recognized.

[0057] On the other hand, as shown in Figures 1 to 4, on the bottom side (second surface, sliding surface) of the first substrate 110, there are provided a first electrode 210 which functions as an electrode of the variable capacitor 200 and is connected via an electrode wire to the communication circuit section 300 formed on the top side, and a connection terminal 113 which is a terminal for electrically connecting to a second electrode 220 which functions as another electrode of the variable capacitor 200 and is connected via an electrode wire to the communication circuit section 300 formed on the top side.

[0058] The first electrode 210 has a predetermined length (about 30 mm) extending in the sliding direction and a predetermined width (for example, about 5 mm to 10 mm).

[0059] The connection terminal 113 is physically connected to the stationary electrode 124 formed on the second substrate 120 during sliding, and slides on the stationary electrode 124 as the first substrate 110 and the second substrate 120 slide.

[0060] Furthermore, as shown in Figures 1 to 4, a guide rail (male portion) 131 is formed on the bottom side of the first substrate 110, which slides at least one of the first substrate 110 and the second substrate 120 in accordance with the displacement of the first reference position P1 and the second reference position P2 while maintaining the opposing state between the first substrate 110 and the second substrate 120.

[0061] In particular, the guide rails (male portions) 131 are rectangular members that are fitted into the insertion openings of the second base material 120, and are a pair of wide left and right rails that have a given length in the sliding direction.

[0062] A pair of left and right guide rails 131 are formed at the ends perpendicular to the sliding direction, and extend from near the center of the first base material 110 to a guide stopper 133 that limits the sliding range during sliding.

[0063] The guide stopper 133 is formed on the end portion 112 side together with the through hole 31 through which the fixing member 30 passes. It is formed by

[0064] Like the first substrate 110, the second substrate 120 is not particularly limited as long as it is an insulating substrate, and for example, a glass substrate, a resin substrate, a plastic film, or paper can be used.

[0065] The second substrate 120 is housed in a transparent housing B, as shown in FIG. 4, and is fixed together with the housing B at a second reference position P2 of the structure OB by a screw, nail or other fixing member 30 at an end 122 opposite to the end 121 that receives and fits the first substrate 110.

[0066] That is, as shown in FIG. 4, the second substrate 120 is installed along the sliding direction so that a displacement measurement point T for measuring the displacement of the structure OB is located between the first reference position P1 where the first substrate 110 is located as described above and the second reference position P2.

[0067] The second base material 120 has a size of, for example, 40 mm in length and 40 mm in width (length in the sliding direction).

[0068] As with the first base material 110, the second base material 120 may be fixed with a double-sided tape or a given adhesive instead of the fixing member 30.

[0069] As shown in Figures 1 to 4, on the upper surface side of the second substrate 120, there are arranged a second electrode 220 which functions as an electrode of the variable capacitor 200 and is arranged opposite the first electrode 210, and a stationary electrode 124 which is connected to the second electrode 220 via an electrode wire and is physically and electrically connected to a connection terminal 113 provided on the first substrate 110.

[0070] As shown in FIG. 3, when measurement of the displacement measurement point is started and the first substrate 110 is completely fitted to the second substrate, the second electrode 220 has an area that completely covers the width direction and sliding direction of the first electrode 210.

[0071] The second electrode 220 has, for example, a predetermined length (30 mm or more) extending in the sliding direction and a predetermined width (for example, 7 mm to 14 mm or more).

[0072] The stationary electrode 124 extends in the sliding direction, and is formed so that the connection terminal 113 slides as the first substrate 110 and the second substrate 120 slide.

[0073] On the other hand, on the bottom side (second surface, sliding surface) of the second substrate, as shown in Figures 1 to 4, a guide rail (female part) 141 is formed which pairs with the guide rail (male part) 131 of the first substrate, fits the guide rail (male part) 131 inside, and functions as a sliding means.

[0074] The guide rails (female portion) 141 have an insertion opening into which the guide rails (male portion) 131 of the first base material 110 are inserted, and are a pair of wide rails on the left and right sides having a given length in the sliding direction.

[0075] In particular, the pair of left and right guide rails (female portions) 141 are formed at the ends in the direction perpendicular to the sliding direction, similar to the guide rails (male portions) 131.

[0076] The pair of left and right guide rails 141 (female portions) are shaped to come into contact with the guide stoppers 133 of the first base material 110 and not allow sliding thereafter.

[0077] [A1.3] Principle of variable capacitor and its relationship to displacement measurement points Next, the principle of the variable capacitor of the RFID tag 100 of this embodiment and its relationship with displacement measurement points will be described with reference to FIGS.

[0078] FIG. 5 is a diagram for explaining the principle of the variable capacitor of the RFID tag 100 of this embodiment and its relationship with the displacement measurement point, and FIG. 6 is a graph showing the relationship between the capacitance of the variable capacitor of the RFID tag of this embodiment and the displacement amount at the displacement meter side point.

[0079] As shown in Figures 5 and 6, the variable capacitor 200 of this embodiment has a first electrode 210 and a second electrode 220 that face each other with a predetermined gap (for example, about 1 mm), and therefore functions as a capacitor that exhibits a capacitance that corresponds to the area where the first electrode 210 and the second electrode 220 face each other.

[0080] In particular, the variable capacitor 200 of this embodiment has the maximum capacitance when measurement of the displacement measurement point is started and the first substrate 110 is completely fitted into the second substrate (see, for example, Figure 5(A)).

[0081] Furthermore, if the crack at the displacement measurement point grows larger and spreads in the direction separating the first substrate 110 and the second substrate 120, the opposing area between the first electrode 210 and the second electrode 220 gradually becomes smaller as the crack spreads, and the capacitance of the variable capacitor 200 of this embodiment also becomes smaller (see, for example, Figure 5(B)).

[0082] For example, the capacitance value of the variable capacitor 200 can be calculated using the following (Equation 1) relating to the capacitance of a plate capacitor.

[0083] Capacitance = εS / d (Equation 1)

[0084] In (Equation 1), "ε" is the dielectric constant. In this embodiment, air is present between the first electrode 210 and the second electrode 220, so the dielectric constant "ε" is the dielectric constant of a vacuum, "ε0 = 8.85 × 10 -12 This is approximately equal to "(F / m)".

[0085] In addition, in (Equation 1), "d" represents the distance between the electrodes, and in this embodiment, is set to about "1 mm."

[0086] Furthermore, in (Equation 1), "S" corresponds to the area of ​​the overlapping region of the first electrode 210 and the second electrode 220 that constitute the plate capacitor.

[0087] In this embodiment, the dielectric constant "ε" and the inter-electrode distance "d" are fixed at constant values ​​and do not change, so the capacitance value of the variable capacitor 200 is proportional to the area of ​​the overlapping region of the first electrode 210 and the second electrode 220. As shown in Figure 6, the area of ​​this region changes as the crack at the displacement measurement point spreads, and as a result, it can be seen that the capacitance value of the variable capacitor 200 changes linearly.

[0088] 6 shows that the capacitance of the variable capacitor 200 decreases by 0.38 pF for every 0.1 mm of expansion. However, the size of the first electrode 210 in the experimental results of FIG. 6 is 40 mm in length (width) and 20 mm in width (length in the sliding direction), and the size of the second electrode is 40 mm in length (width) and 20 mm in width (length in the sliding direction). However, FIG. 6 does not show the dimensions of the connection, etc. It can be seen that due to structural reasons or electrostatic capacitance (parasitic capacitance) that is parasitic on the circuit, the RFID tag 100 does not have the ideal capacitor capacitance shown in the above (Equation 1), and a considerable loss occurs.

[0089] [A1.4] Communication circuit section Next, the communication circuit section 300 of this embodiment will be described with reference to FIGS.

[0090] 7 is a system configuration diagram showing the configuration of the displacement measuring point management system S of this embodiment, and FIG. 8 is a functional block diagram showing the configuration of the communication circuit section 300 of this embodiment.

[0091] The communication circuit unit 300 is configured to receive signals transmitted from a reader device such as the displacement measurement point management system S described below, generate an electromotive force based on the received signal, and use the electromotive force to send and receive signals to the outside.

[0092] Furthermore, as described above, the communication circuit section 300 is provided on a surface (upper surface) of the first substrate 110 different from the surface on which the first electrode 210 is formed, and is electrically connected to the first electrode 210, and is also electrically connected to the second electrode 220 via the stationary electrode 124 of the second substrate 120 and the connection terminal 113 of the first substrate 110.

[0093] Specifically, the communication circuit unit 300 is composed of an IC 310, an antenna 320, and a pair of antenna elements 330, as shown in FIG.

[0094] The IC 310 has circuits (internal circuits) for executing various processes including transmission and reception of signals in a given band (for example, UHF band), and is configured to execute appropriate processes depending on the usage mode.

[0095] The IC 310 is formed in the center of the first substrate 110 and is electrically connected to the first electrode 210, the second electrode 220, and the antenna 320.

[0096] In particular, IC310 has a memory and elements as a transmitting / receiving circuit that mediates the transmission and reception of signals between antenna 320 and each internal circuit, as well as an electromotive force generation control circuit that generates electromotive force based on the signal received by antenna 320 and supplies it to each internal circuit, and a processing circuit that executes predetermined processing.

[0097] For example, IC310, as a transmitting / receiving circuit, is configured to transmit and receive signals in the frequency band used in the corresponding system, and includes a downconverter that downconverts RF (Radio Frequency) signals to baseband signals, an upconverter that upconverts baseband signals to RF signals, a filter circuit, a modulator / demodulator, a DAC (digital-to-analog converter), and an ADC (analog-to-digital converter).

[0098] Furthermore, the electromotive force generation control circuit generates an electromotive force based on electromagnetic waves supplied from the information processing device 500 (specifically, the RFID reader / writer 540), and supplies the generated electromotive force to each circuit as power.

[0099] Then, the processing circuit executes a process as a predetermined process to transmit a signal related to the capacitor formed by the first electrode 210 and the second electrode 220 to the displacement measuring point management system S in accordance with a predetermined protocol.

[0100] The IC 310 receives a given signal from the first electrode 210 and the second electrode 220. In addition to the signal related to the capacitor formed by the RFID tag 100, when the RFID tag 100 is used simultaneously with one or more other RFID tags 100, a process of transmitting an identification signal (identification information) of the corresponding RFID tag 100 may be executed.

[0101] In this case, the memory is a non-volatile memory having a predetermined storage area, and for example, the identification information of the RFID tag 100 is stored in the storage area.

[0102] The antenna 320 is formed in a given shape (for example, a circle or a square) based on the IC 310 formed in the center of the substrate 20 , and is connected to the IC 310 and a pair of antenna elements 330 .

[0103] The pair of antenna elements 330 are formed from a conductor such as aluminum or copper, and have a predetermined shape that extends outward from the antenna 320 .

[0104] Similarly to the other elements of the communication circuit section 300, the pair of antenna elements 330 are provided on a surface (upper surface) of the first base material 110 different from the surface on which the first electrode 210 is formed.

[0105] If the RFID tag 100 is an active type, the communication circuit section 300 has a power source.

[0106] [A2] Displacement measurement point management system [A2.1] Overview of the Displacement Measurement Point Management System Next, a displacement measurement point management system S using the RFID tag 100 of this embodiment will be described.

[0107] The displacement measuring point management system S of this embodiment is a system that uses a signal transmitted from the RFID tag 100 described above to measure the displacement of a targeted displacement measuring point on which the RFID tag 100 is placed.

[0108] In particular, the displacement measurement point management system S of this embodiment has one or more of the above-mentioned RFID tags 100, and an information processing device 500 that performs various processes related to measuring the displacement measurement point targeted by each RFID tag 100 based on the signal transmitted from that RFID tag 100.

[0109] That is, the displacement measurement point management system S of this embodiment is composed of an RFID tag 100 that transmits the capacitance of the variable capacitor 200 as information at predetermined timings, and an information processing device 500 that receives the signal transmitted from the RFID tag 100 and performs processing such as tallying and calculating the displacement measurement points and notifying the administrator based on the received signal.

[0110] The information processing device 500 is an information processing device configured by an information processing device such as a PC (personal computer), a tablet type information communication terminal device, or a smartphone used by an administrator.

[0111] The information processing device 500 transmits electromagnetic waves to supply power to the RFID tag 100, and performs processes such as tallying and calculating displacement measurement points and notifying an administrator based on the information (signal) transmitted from the RFID tag 100.

[0112] [A2.2] Configuration of information processing device Next, the information processing device 500 of this embodiment will be described with reference to Fig. 8. Fig. 8 is a functional block diagram showing the configuration of the information processing device 500 of this embodiment.

[0113] As shown in FIG. 8, the information processing device 500 of this embodiment has a processing unit 510, an RFID reader / writer 540, an operation input unit 560 consisting of a touch panel or the like, a memory unit 570, an information storage medium 580, a display unit 590 consisting of a display element such as a liquid crystal panel, a sound output unit 592, and a communication unit 596.

[0114] The RFID reader / writer 540 receives a signal transmitted from the RFID tag 100 while transmitting electromagnetic waves for supplying power to the RFID tag 100 and given data (for example, the ID of the RFID tag 100).

[0115] For example, the RFID reader / writer 540 of this embodiment provides the RFID tag 100 with electromagnetic waves for power supply and identification information (ID) of the RFID tag 100 from which data is to be acquired, and also reads (acquires) information on the capacitance of each variable capacitor 200 at a predetermined timing.

[0116] In addition, the RFID reader / writer 540 of this embodiment may acquire the identification information (ID) of the RFID tag 100 along with the capacitance information of each variable capacitor 200 at a predetermined timing (especially when multiple RFID tags 100 are used), or may simply acquire the identification information (ID) of the RFID tag 100 instead of the information transmitted from the RFID tag 100.

[0117] The operation input unit 560 is a device for inputting input information such as operation instructions from the user, and outputs the user's input information to the processing unit 510 .

[0118] The operation input unit 560 of this embodiment has a configuration for detecting input information (input signals) from the user, and is composed of, for example, a lever, a button, a microphone, a touch panel display, a keyboard, a mouse, and the like.

[0119] The storage unit 570 serves as a work area for the processing unit 510 and the like, and its function can be realized by hardware such as RAM (VRAM).

[0120] The storage unit 570 of this embodiment includes a main storage unit 171 that is used as a work area.

[0121] The information storage medium 580 is computer-readable, and stores various types of data including various applications and an OS (operating system).

[0122] That is, the information storage medium 580 stores applications for causing a computer to function as each unit of this embodiment (applications for causing a computer to execute the processing of each unit).

[0123] For example, the information storage medium 580 is an optical disk (CD, DVD), a magneto-optical disk (MO), a magnetic disk, a hard disk drive, a flash memory, a magnetic tape, a memory (ROM), a memory card, or the like.

[0124] The communication unit 596 performs various controls for communication with the outside (for example, the RFID tag 100), and its functions are realized by hardware such as various processors or communication ASICs, or programs.

[0125] The processing unit 510 can perform various processes of this embodiment by reading and executing the applications stored in the information storage medium 580. Note that the types of applications stored in the information storage medium 580 are arbitrary.

[0126] The processing unit 510 performs various processes of this embodiment based on the application stored in the information storage medium 580. Note that the processing unit 510 of this embodiment may read out a program or data stored in the information storage medium 580, temporarily store the read program or data in the storage unit 570, and perform processing based on the program or data.

[0127] Furthermore, the processing unit 510 (processor) performs various processes using the main memory unit 171 in the memory unit 570 as a work area. The functions of the processing unit 510 can be realized by hardware such as various processors (CPU, DSP, etc.) or programs.

[0128] The processing unit 510 includes a communication control unit 511, an input reception processing unit 512, a displacement management unit 513, a display control unit 514, a reading control unit 515, a drawing unit 520, and a sound processing unit 530. Note that some of these units may be omitted.

[0129] The communication control unit 511 controls the RFID reader / writer 540 to transmit and receive data to and from the RFID tag 100 .

[0130] In particular, the communication control unit 511 transmits to the RFID tag 100 electromagnetic waves for electromotive force and data such as identification information (ID) of the RFID tag 100 from which data is to be acquired, while receiving data (signals) transmitted from the RFID tag 100.

[0131] The communication control unit 511 then performs processing such as storing the received data in the storage unit 570, analyzing the received data, and controlling other processing related to the transmission and reception of data.

[0132] Upon receiving a signal transmitted from the RFID tag 100 , the input reception processing unit 512 outputs the received signal to the displacement management unit 513 .

[0133] The displacement management unit 513 executes processing related to the displacement of the displacement measurement point based on the information transmitted from the RFID tag 100 via the input reception processing unit 512 .

[0134] For example, when the displacement management unit 513 receives information on the capacitance of the variable capacitor 200 transmitted from the RFID tag 100, it works in conjunction with the sound processing unit 530 to perform processing for outputting a given alarm sound from the sound output unit 592, or works in conjunction with the display control unit 514 to perform processing for displaying a warning image on the display unit 590.

[0135] In addition, the displacement management unit 513 may receive information from multiple RFID tags 100. In this case, it manages the reception of signals transmitted from each RFID tag 100 and executes a given process in response to changes in each displacement measurement point where an RFID tag 100 is previously installed.

[0136] For example, in this case, the displacement management unit 513 performs a given calculation based on the capacitance transmitted from the RFID tag 100, and calculates the amount of displacement (that is, the amount of movement).

[0137] Then, the displacement management unit 513 generates data (hereinafter referred to as "visualization data") for visualizing the calculated amount of displacement, and in conjunction with the display control unit 514, displays the visualization data superimposed on an image that maps the locations of each RFID tag 100.

[0138] The display control unit 514 executes a process for displaying on the display unit 590 an image relating to the displacement of the displacement measuring point.

[0139] The reading control unit 515 controls the RFID reader / writer 540 that reads given information (signals) transmitted from the RFID tag 100 .

[0140] The drawing unit 520 performs drawing processing based on the various processes performed by the processing unit 510, thereby generating an image, which is output to the display unit 590 by the display control unit 514.

[0141] The sound processing unit 530 performs sound processing based on the results of various processes performed in the processing unit 510 , generates sound effects, alarm sounds, etc., and outputs them to the sound output unit 592 .

[0142] [B] Second embodiment [B1] Overview and structure of RFID tags First, the outline and general configuration of the RFID tag 100 of this embodiment will be described with reference to FIGS.

[0143] 9 is a circuit layout diagram (top view) of the first substrate 110 of the RFID tag 100 of this embodiment, and FIG. 10 is a circuit layout diagram (bottom view) of the first substrate 110 of the RFID tag 100 of this embodiment.

[0144] FIG. 11 is a circuit layout diagram (top view and bottom view) on the second substrate 120 of the RFID tag 100 in this embodiment, and FIG. 12 is a diagram for explaining the principle of the variable capacitor of the RFID tag 100 in this embodiment.

[0145] This embodiment is characterized in that, instead of realizing the electrical connection between the variable capacitor (hereinafter referred to as the "first variable capacitor") 200 and the communication circuit section 300 by sliding the connection terminal 113 on the stationary electrode 124 in the first embodiment, the electrical connection is realized by forming a second variable capacitor 250 that is different from the first variable capacitor 200, thereby eliminating the physical connection structure.

[0146] That is, as shown in Figures 9 to 12, the RFID tag 100 of this embodiment further includes a second variable capacitor 250 electrically connected in series to the variable capacitor (i.e., first variable capacitor) 200 of the first embodiment, and the second variable capacitor 250 is formed from a first electrode 220 arranged on the sliding surface of the second substrate 120 and a second electrode 230 arranged on the sliding surface of the first substrate 110, and has a configuration in which it functions as a variable capacitor whose capacitance changes in accordance with the change in area due to the sliding of the opposing regions of the first electrode 220 and the second electrode 230.

[0147] In particular, in the RFID tag 100 of this embodiment, the second electrode 220 of the first variable capacitor 200 and the first electrode 220 of the second variable capacitor 250 are configured as integrally formed planar electrodes.

[0148] With this configuration, the RFID tag 100 of this embodiment, like the first embodiment, can output to the outside information on the change in capacitance of the capacitor when the distance between two points on the structure OB changes, making it possible to easily detect structural problems that are difficult to detect by visual inspection or simple measurement, such as cracks or fissures in the structure OB or the inclination of the structure OB, and is also capable of being used repeatedly and of properly detecting the amount of displacement.

[0149] Furthermore, the RFID tag 100 of this embodiment can be manufactured more easily and inexpensively because the number of parts can be reduced.

[0150] In addition, in this embodiment, the configuration other than the above-mentioned characteristic points is the same as that of the first embodiment, and the same members are given the same reference numerals and the description thereof will be omitted.

[0151] [B2] RFID tag configuration Next, the configuration of the RFID tag 100 of this embodiment will be described in detail.

[0152] The first substrate 110 has a shape different from that of the first embodiment, with the first electrode 210 of the first variable capacitor 200 and the second electrode 230 of the second variable capacitor formed on the end 111 side, and the communication circuit section 300 formed on the end 112 side.

[0153] In particular, the first base material 110 is configured to have a length of 35 mm and a width (length in the sliding direction) of 56 mm to 105 mm, and both the top and bottom surfaces are covered with a protective film (resist) whose main component is resin or the like.

[0154] As shown in Figures 9 and 10, on the upper surface of the first substrate 110, a communication circuit section 300 is provided, together with a protective film, which is formed from an IC 310, an antenna 320, and an element for the antenna 320 (hereinafter referred to as the "antenna element") 330.

[0155] 9 and 10, a marking 400 is formed on the protective film on the upper surface of the first base material 110. The marking 400 is visible from the outside, allows the amount of movement when the first base material 110 is slid in the sliding direction to be visible, and is used for alignment with the marking M formed on the transparent housing B. The marking M is formed on the housing B by printing.

[0156] As in the first embodiment, the communication circuit unit 300 may be provided under or on the protective film, but as in the first embodiment, it is preferable that the communication circuit unit 300 be covered with a protective film from the viewpoint of rust prevention.

[0157] On the other hand, as shown in Figures 9 and 10, on the bottom side (second surface, sliding surface) of the first substrate 110, there is provided a first electrode 210 which functions as an electrode of the first variable capacitor 200 and is connected via an electrode wire to the communication circuit section 300 formed on the upper surface side, and a second electrode 230 which functions as an electrode of the second variable capacitor 250 and is connected via an electrode wire to the communication circuit section 300 formed on the upper surface side together with the first electrode 210 which functions as an electrode of the first variable capacitor 201.

[0158] First electrode 210 of first variable capacitor 201 has a predetermined length (about 30 mm) extending in the sliding direction and a predetermined width (for example, about 5 mm to 10 mm).

[0159] Similar to the first electrode 210 of the first variable capacitor 200, the second electrode 230 of the second variable capacitor has a predetermined length (approximately 30 mm) extending in the sliding direction and a predetermined width (for example, approximately 5 mm to 10 mm).

[0160] Furthermore, as shown in Figures 9 and 10, a pair of guide rails (male portion) 131 and guide rails (female portion) 141 are formed on the bottom side of the first substrate 110, which slide at least one of the first substrate 110 and the second substrate 120 in accordance with the displacement of the first reference position P1 and the second reference position P2 while maintaining the opposing state between the first substrate 110 and the second substrate 120.

[0161] The guide rails (male portions) 131 are rectangular members that are fitted into the insertion openings of the second base material 120, and are a pair of wide rails on the left and right sides that have a given length in the sliding direction.

[0162] In particular, a pair of left and right guide rails (male portions) 131 are formed at the ends in a direction perpendicular to the sliding direction, and extend from the center of the first electrode 210 and the second electrode 230 to near the center of the first substrate 110.

[0163] The second substrate 120 is stored in a housing B similar to that of the first embodiment, as shown in FIG. 11, and is fixed to the second reference position P2 of the structure OB together with the housing B by a screw, nail or other fixing member 30 at an end 122 opposite to the end 121 that receives and fits the first substrate 110.

[0164] The second base material 120 has a length of 50 mm and a width (length in the sliding direction) of 60 mm.

[0165] As shown in FIG. 11, a planar electrode 220 is disposed on the upper surface of second substrate 120, which serves as the second electrode of first variable capacitor 201 and also as the first electrode of second variable capacitor 250.

[0166] The planar electrode 220 has, for example, a predetermined length (45 mm or more) extending in the sliding direction and a predetermined width (for example, 38 mm or more).

[0167] On the other hand, on the bottom side (second surface, sliding surface) of the second substrate, as shown in FIG. 11, there is formed a guide rail (female part) 141 which pairs with the guide rail (male part) 131 of the first substrate, has the guide rail (male part) 131 fitted inside, and functions as a sliding means.

[0168] The guide rails (female portion) 141 have an insertion opening into which the guide rails (male portion) 131 of the first base material 110 are inserted, and are a pair of wide rails on the left and right sides having a given length in the sliding direction.

[0169] In particular, the pair of left and right guide rails 141, like the guide rails (male portions) 131, are formed at the ends in the direction perpendicular to the sliding direction.

[0170] [B3] Principle of variable capacitor Next, the principle of the variable capacitor of the RFID tag 100 of this embodiment will be described.

[0171] As shown in FIG. 12, the first variable capacitor 200 of this embodiment is opposed to the planar electrode 220 and the second electrode 230 of the second variable capacitor 250 at a predetermined distance (for example, about 1 mm) in addition to the first variable capacitor 200 itself, and therefore functions as a variable capacitor that exhibits a capacitance according to the area where the planar electrode 220 and the second electrode 230 face each other, similar to the first variable capacitor 200.

[0172] Furthermore, in this embodiment, in the RFID tag 100 of the second embodiment, the first variable capacitor 200 and the second variable capacitor 250 are connected in series, and the capacitance value is proportional to the area of ​​the overlapping region of the electrodes of the first variable capacitor 200 and the second variable capacitor 250. As in the first embodiment, the area of ​​this region changes as the crack at the displacement measurement point spreads, and as a result, it can be seen that the capacitance value due to the series combination of the first variable capacitor 200 and the second variable capacitor 250 changes linearly.

[0173] [C] Third embodiment [C1] Overview of RFID tags First, an overview of the RFID tag 100 of this embodiment will be described with reference to FIGS.

[0174] 13 is a circuit layout diagram (top view) of the first substrate 110 of the RFID tag 100 of this embodiment, and FIG. 14 is a circuit layout diagram (bottom view) of the first substrate 110 of the RFID tag 100 of this embodiment.

[0175] Also, Figure 15 is a circuit layout diagram (top view and bottom view) of the second substrate 120 of the RFID tag 100 in this embodiment, and Figure 16 is a usage state diagram (bottom view) showing the RFID tag 100 in this embodiment with the first substrate 110 and the second substrate 120 engaged, in its usage state.

[0176] This embodiment is characterized in that in the RFID tag 100 of the second embodiment, in addition to the change in capacitance of the variable capacitors (i.e., the first variable capacitor and the second variable capacitor) accompanying one sliding direction at one displacement measurement point T, variable capacitors (i.e., the third variable capacitor and the fourth variable capacitor described later) are provided in which the capacitance changes in a direction different from the sliding direction, thereby appropriately detecting the amount of planar displacement at the displacement measurement point T.

[0177] That is, as shown in Figures 13 to 16, the RFID tag 100 of this embodiment has a configuration that, in addition to the first variable capacitor 201 and the second variable capacitor 202, it also has a third variable capacitor 203 and a fourth variable capacitor 204 whose capacitance changes when the sliding direction is a direction different from the direction in which changes in capacitance in the first variable capacitor 201 and the second variable capacitor 202 are detected (for example, the vertical direction is preferable).

[0178] With this configuration, the RFID tag 100 of this embodiment can output two-dimensional position changes in the same object (structure OB) to the outside as information on changes in the capacitance of the capacitor, making it possible to easily detect structural problems such as cracks or fissures in the structure OB that are difficult to detect by visual inspection or simple measurement, and is also capable of being used repeatedly and properly detecting the amount of displacement.

[0179] Furthermore, the RFID tag 100 of this embodiment can be manufactured more easily and inexpensively because the number of parts can be reduced, similarly to the first and second embodiments.

[0180] In addition, in this embodiment, the configuration other than the above-mentioned characteristic points is the same as that of the first embodiment, and the same members are given the same reference numerals and the description thereof will be omitted.

[0181] The RFID tag 100 of this embodiment will be described taking as an example a case where the first base material 110 and the third base material are integrally formed.

[0182] [C2] RFID tag configuration Next, the general configuration of the RFID tag 100 of this embodiment will be described.

[0183] As shown in FIGS. 13 to 16, the RFID tag 100 of this embodiment includes a first substrate 110 fixedly installed on a structure OB (first object), a second substrate 120 fixedly installed on the structure OB at a second reference position P2 different from the first reference position P1, separate and independent from the first substrate 110, and a second substrate 120 fixedly installed on the structure OB at a second reference position P2 different from the first reference position P1, separate and independent from the second substrate 120. The substrate has a third substrate 150 that is fixed and installed at a third reference position P3 that is different from position P1 and the second reference position P2, and is fixed and installed opposite the first substrate 110 and the second substrate 120.

[0184] Furthermore, as shown in Figures 13 to 16, the RFID tag 100 of this embodiment has guide rails 151 and 152 that slide the first substrate 110, the second substrate 120, and the third substrate 150 in a first direction and a second direction different from the first direction (for example, a direction perpendicular to the first direction) while maintaining the first substrate 110, the second substrate 120, and the third substrate 150 facing each other.

[0185] The guide rail 151 is a rail that controls sliding in the first direction and also functions as a stopper for sliding in the second direction, and the guide rail 152 is a rail that controls sliding in the second direction and also functions as a stopper for sliding in the first direction.

[0186] As shown in Figures 13 to 16, the RFID tag 100 of this embodiment has a first capacitor circuit 260 whose capacitance changes with sliding in a first direction, a second capacitor circuit 270 whose capacitance changes with sliding in a second direction, and communication circuit units 300 and 301 that transmit information indicating the change in capacitance of the first capacitor circuit 260 and the change in capacitance of the second capacitor circuit 270 as change information.

[0187] Specifically, the first capacitor circuit 260 is composed of a first electrode (hereinafter referred to as the "first electrode for the first variable capacitor") 21 arranged on the sliding surface on the first substrate 110 where the first substrate 110 and the second substrate 120 slide, and arranged along a first direction, and a second electrode (hereinafter referred to as the "second electrode for the first variable capacitor") 22 (220) arranged on the sliding surface on the second substrate 120, and arranged along the first direction, and has a first variable capacitor 201 whose capacitance changes in accordance with the change in area due to the sliding of the opposing regions of the first electrode for the first variable capacitor 21 and the second electrode for the first variable capacitor 22 (220) in the first direction.

[0188] The second capacitor circuit 270 is composed of a first electrode (hereinafter referred to as the "first electrode for the third variable capacitor") 25 that is disposed on the sliding surface on the third substrate 150 where the second substrate 120 and the third substrate 150 slide, and that is disposed along the second direction, and a second electrode (hereinafter referred to as the "second electrode for the third variable capacitor") 26 (220) that is disposed on the sliding surface on the first substrate 110, and that is disposed along the second direction, and has a variable capacitor (i.e., the above-mentioned third variable capacitor) 203 whose capacitance changes in accordance with the change in area due to the sliding of the opposing regions of the first electrode for the third variable capacitor 25 and the second electrode for the third variable capacitor 26 (220).

[0189] In particular, the first capacitor circuit 260 of this embodiment further includes a variable capacitor (that is, the above-mentioned second variable capacitor) 202 electrically connected in series to the first variable capacitor 201, as shown in FIG.

[0190] As shown in FIG. 16, the second variable capacitor 202 is formed from a first electrode (hereinafter referred to as the "first electrode for the second variable capacitor") 23 (220) arranged on the sliding surface on the second substrate 120, and a second electrode (hereinafter referred to as the "second electrode for the second variable capacitor") 24 arranged on the sliding surface on the first substrate 110, and has a configuration that functions as a variable capacitor whose capacitance changes in accordance with the change in area due to the sliding of the opposing regions of the first electrode for the second variable capacitor 23 and the second electrode for the second variable capacitor 24.

[0191] 16, the second capacitor circuit 270 further includes a variable capacitor (that is, the above-mentioned fourth variable capacitor) 204 electrically connected in series to the third variable capacitor 203.

[0192] As shown in FIG. 16, the fourth variable capacitor 204 is formed from a first electrode (hereinafter referred to as the "first electrode for the fourth variable capacitor") 27 (220) disposed on the sliding surface of the second substrate 120, and a second electrode (hereinafter referred to as the "second electrode for the fourth variable capacitor") 28 disposed on the sliding surface of the third substrate 150, and is configured to function as a variable capacitor whose capacitance changes in accordance with the change in area due to the sliding of the opposing regions of the first electrode for the fourth variable capacitor 27 (220) and the second electrode for the fourth variable capacitor 28.

[0193] With this configuration, the RFID tag 100 of this embodiment can output two-dimensional position changes of the same object or two-dimensional position changes of two objects to the outside as information on changes in the capacitance of a capacitor, making it possible to easily detect structural problems that are difficult to detect by visual inspection or simple measurement, such as cracks or fissures in a structure or the inclination of the structure, and is also reusable and can properly detect the amount of displacement.

[0194] The second capacitor circuit 270 of this embodiment basically has the same configuration as the first capacitor circuit 260, except for the sliding direction.

[0195] In addition, in this embodiment, as shown in FIG. 16, the second electrode 22 for the first variable capacitor, the first electrode 23 for the second variable capacitor, the second electrode 26 for the third variable capacitor, and the first electrode 27 for the fourth variable capacitor are integrally formed as a planar electrode 220.

[0196] Furthermore, in this embodiment, both the first capacitor circuit 260 and the second capacitor circuit 270 are formed by two variable capacitors, but as in the first embodiment, they may be formed by one variable capacitor and a contact structure that can be physically and electrically connected even when sliding.

[0197] [D] Variation [D1] Variation 1 Next, a first modification of the first and second embodiments will be described with reference to FIG.

[0198] Note that Figure 17 is a diagram for explaining this variant example 1, and is a usage state diagram (cross-sectional view) showing the usage state of the RFID tag 100 when the first substrate 110 and the second substrate 120 are arranged on different objects.

[0199] In the RFID tag 100 of the first and second embodiments described above, the first substrate 110 and the second substrate 120 of the RFID tag 100 are provided on the same object, but as shown in FIG. 17, the first substrate 110 and the second substrate may be provided on different objects.

[0200] For example, in the RFID tag 100 of this modified example, the first substrate 110 may be disposed on a first object OB1, and the second substrate 120 may be disposed on a second object OB2, and the size of the gap may be detected as a displacement measurement point.

[0201] [D2] Variation 2 Next, a second modification of the first and second embodiments will be described with reference to FIG.

[0202] 18 is a diagram for explaining the second modification, and shows a plurality of RFID tags 1. 10 is a diagram for explaining a detection method when 00 is used. FIG.

[0203] As shown in Figure 18, the displacement measurement point management system S of this modified example arranges multiple RFID tags 100 at different heights on an upright, immovable pole PL a predetermined distance away from the test building, and detects the gap between each upright, immovable pole PL and the building.

[0204] In this case, the displacement measuring point management system S of this modified example calculates the inclination of the building according to the change in the gaps between the multiple RFID tags 100, and notifies the result to an administrator or the like via the display unit 590 or the like.

[0205] [D3] Variation 3 (Various wireless technologies) Next, a third modification of the RFID tag 100 of this embodiment will be described.

[0206] In this embodiment, the principles and methods of managing displacement measurement points using RFID tags 100 are explained, but this modified example may use short-range wireless technologies such as Bluetooth (registered trademark), WiFi, and LPWA (Low Power Wide Area) instead of RFID technology.

[0207] [D4] Modification 4 (substrate on which communication circuit unit is mounted) Next, a modified example of the RFID tag 100 of this embodiment will be described.

[0208] In each of the above embodiments, the communication circuit section 300 is mounted on the first substrate 110, but it may also be mounted on the second substrate 120 or the third substrate 150 (in the case of the third embodiment).

[0209] [D5] Modification 5 (modification of the capacitor circuit in the third embodiment) Next, a fifth modified example of the third embodiment will be described with reference to FIGS.

[0210] Note that Figure 19 is a diagram for explaining variant example 5 in the above embodiment, and is a circuit layout diagram (bottom view) of the first substrate 110 of the RFID tag 100, and Figure 20 is a usage state diagram (bottom view) of the RFID tag 100 in a state in which the first substrate 110 and the second substrate 120 are fitted together in variant example 5, showing the usage state.

[0211] This modified example is characterized in that, in the RFID tag 100 of the third embodiment, the variable capacitor circuits 201 and 203 formed on the first substrate 110 and the third substrate 150, respectively, are formed by single variable capacitors 21 and 23, and each connection terminal 113 is slid on the flat electrode 220 to achieve electrical connection between each variable capacitor 21 and 23 and the communication circuit section 300.

[0212] That is, this modified example is characterized in that in the RFID tag 100 of the third embodiment that detects two-dimensional displacement, the variable capacitor circuits 201 and 203 each have a setting structure similar to that of the first embodiment, and the configuration other than this characteristic point is similar to that of the third embodiment, and the same components are given the same symbols and their description will be omitted.

[0213] Specifically, as shown in FIGS. 19 and 20, the RFID tag 100 of this modification has the following features: (A1) a first contact structure (connection terminal 113a) that maintains electrical connection between the variable capacitor 21 for the first capacitor circuit and the communication circuit section 300 when sliding in a first direction; (A2) a second contact structure (connection terminal 113b) that maintains electrical connection between the variable capacitor 23 for the third capacitor circuit and the communication circuit section 300 when sliding in the second direction; (A3) Guide rails 151 and 152 that regulate the sliding of the first base material 110 and the third base material 150 in the first direction and the second direction, respectively; It consists of:

[0214] The connection terminal 113 may have any structure that allows it to move in the plane of the planar electrode 220.

[0215] [E] Other The present invention is not limited to the above-described embodiments, and various modifications are possible. For example, terms cited in the specification or drawings as broadly defined or synonymous terms can be replaced with broadly defined or synonymous terms in other descriptions in the specification or drawings.

[0216] The present invention includes configurations that are substantially the same as the configurations described in the embodiments (for example, configurations with the same functions, methods, and results, or configurations with the same purpose and effects). The present invention also includes configurations in which non-essential parts of the configurations described in the embodiments are replaced. The present invention also includes configurations that achieve the same effects as the configurations described in the embodiments or that can achieve the same purpose. The present invention also includes configurations in which publicly known technology is added to the configurations described in the embodiments.

[0217] Although the embodiments of the present invention have been described in detail as above, it will be readily apparent to those skilled in the art that many modifications can be made without substantially departing from the novel features and effects of the present invention. Therefore, all such modifications are intended to be included within the scope of the present invention. [Explanation of symbols]

[0218] M: Marking S: Displacement measurement point management system T: Displacement measurement point 20: Base material 21: First electrode for first variable capacitor 22: Second electrode for first variable capacitor 23: First electrode for second variable capacitor 24: Second electrode for second variable capacitor 25: First electrode for third variable capacitor 26: Second electrode for third variable capacitor 27: First electrode for fourth variable capacitor 28: Second electrode for fourth variable capacitor 30: Fixing member 100: RFID tags 110: 1st base material 113: Connection terminal 120: 2nd base material 124: Stationary electrode 131: Guide rail 133: Guide stopper 141: Guide rail 150: Third base material 151: Guide rail 152: Guide rail 171: Main memory 200: Variable capacitor 201: First variable capacitor 202: Second variable capacitor 203: Third variable capacitor 204: 4th variable capacitor 210: 1st electrode 220: Planar electrode 224: 1st electrode 230: 2nd electrode 250: Second variable capacitor 260: First capacitor circuit 270: Second capacitor circuit 300: Communication circuit section 400: Marking 500: Information processing equipment 510: Processing section 511: Communication control unit 512: Input reception processing unit 513: Displacement Management Department 514: Display control unit 515: Reading control unit 520: Drawing section 530: Sound processing unit 540: Reader / Writer 560: Operation input section 570: Storage section 580: Information storage medium 590:Display section 592: Sound output unit 596: Communications Department

Claims

1. a first substrate fixedly installed at a first reference position of the first object; a substrate fixedly installed at a second reference position different from the first reference position, or a substrate fixedly installed at a second reference position indicating a given position of a second object different from the first object, the second substrate being installed separately and independently from the first substrate and facing the first substrate; a sliding means for sliding at least one of the first substrate and the second substrate in accordance with displacement of the first reference position and the second reference position while maintaining the first substrate and the second substrate facing each other; a variable capacitor formed from a first electrode disposed on a sliding surface on the first substrate along which the first substrate and the second substrate slide, and a second electrode disposed on a sliding surface on the second substrate, the capacitance of which changes with an area change due to the sliding of opposing regions of the first electrode and the second electrode; a transmitting means formed on either the first substrate or the second substrate, for transmitting, as change information, information indicating a change in capacitance of the variable capacitor caused by sliding between the first substrate and the second substrate; Equipped with An information communication terminal device, characterized in that the first electrode and the second electrode are formed along a sliding direction indicating a sliding direction.

2. 2. The information communication terminal device according to claim 1, The transmitting means a transmission circuit electrically connected to the variable capacitor; The sliding means is a contact structure that maintains an electrical connection between the variable capacitor and the transmission circuit during the sliding movement; a guide rail that restricts sliding of the first base material and the second base material in the sliding direction; An information communication terminal device comprising:

3. 2. The information communication terminal device according to claim 1, a second capacitor electrically connected in series with the first capacitor representing the variable capacitor; The second capacitor is a first electrode disposed on the sliding surface of the second substrate, and a second electrode disposed on the sliding surface of the first substrate; The information communication terminal device functions as a variable capacitor whose capacitance changes in accordance with the change in area of ​​the opposing regions of the first electrode and the second electrode due to the sliding movement.

4. 4. The information communication terminal device according to claim 3, an information communication terminal device, wherein the second electrode of the first capacitor and the first electrode of the second capacitor are integrally formed;

5. 2. The information communication terminal device according to claim 1, An information communication terminal device, wherein a displacement measurement point for measuring the displacement of the first object is formed between the first reference position and the second reference position along the sliding direction, or a boundary between the first object and the second object is formed along the sliding direction.

6. 2. The information communication terminal device according to claim 1, An information communication terminal device, wherein a marking that is visible from the outside and that allows the amount of movement when slid in the sliding direction to be visible is formed on at least one of the first substrate and the second substrate.

7. a first substrate fixedly mounted on a first object; a second substrate, which is a substrate fixedly installed on the first object at a second reference position different from the first reference position independently of the first substrate, or a substrate fixedly installed at a second reference position indicating a given position of a second object different from the first object; a substrate fixedly installed on the first object or the second object at a third reference position different from the first reference position and the second reference position, separate and independent from the second substrate, or a substrate fixedly installed at a third reference position indicating a given position of a third object different from the first object and the second object, the third substrate being fixedly installed opposite the first substrate and the second substrate; a sliding means for sliding the first substrate, the second substrate, and the third substrate in a first direction and a second direction different from the first direction while maintaining the first substrate, the second substrate, and the third substrate facing each other, respectively; a first capacitor circuit whose capacitance changes in response to sliding in the first direction; a second capacitor circuit whose capacitance changes in response to sliding in the second direction; a transmitting means for transmitting information indicating a change in capacitance of the first capacitor circuit and a change in capacitance of the second capacitor circuit as change information; Equipped with The first capacitor circuit is a first capacitor circuit variable capacitor that is arranged on the first substrate at a sliding surface where the first substrate and the second substrate slide and that is arranged along the first direction, and a first capacitor circuit second electrode that is arranged on the sliding surface of the second substrate and that is arranged along the first direction, and that has a capacitance that changes in accordance with an area change due to sliding in the first direction of opposing regions of the first electrode for the first capacitor circuit and the second electrode for the first capacitor circuit; The second capacitor circuit is an information communication terminal device comprising: a first electrode for a second capacitor circuit that is disposed on the third substrate at a sliding surface where the second substrate and the third substrate slide and that is disposed along the second direction; and a second electrode for a second capacitor circuit that is disposed on the sliding surface of the second substrate and that is disposed along the second direction, and the capacitance of the second capacitor circuit changes in accordance with the change in area of ​​the opposing regions of the first electrode for the second capacitor circuit and the second electrode for the second capacitor circuit due to the sliding.

8. 8. The information communication terminal device according to claim 7, The first capacitor circuit is The first capacitor circuit further includes a second variable capacitor electrically connected in series to the first variable capacitor, the second variable capacitor representing the variable capacitor for the first capacitor circuit; The second variable capacitor is a second variable capacitor first electrode disposed on the sliding surface of the second base material, and a second variable capacitor second electrode disposed on the sliding surface of the first base material, the second variable capacitor first electrode and the second variable capacitor second electrode function as a variable capacitor whose capacitance changes in accordance with an area change due to the sliding of the opposing regions of the second variable capacitor first electrode and the second variable capacitor second electrode; The second capacitor circuit is a fourth variable capacitor electrically connected in series to the third variable capacitor representing the variable capacitor for the second capacitor circuit; The fourth variable capacitor is a fourth variable capacitor first electrode disposed on the sliding surface of the second base material, and a fourth variable capacitor second electrode disposed on the sliding surface of the third base material, An information communication terminal device that functions as a variable capacitor whose capacitance changes in accordance with the change in area due to the sliding of the opposing regions of the fourth variable capacitor first electrode and the fourth variable capacitor second electrode.

9. 9. The information communication terminal device according to claim 8, An information communication terminal device, in which the second electrode for the first variable capacitor, the first electrode for the second variable capacitor, the second electrode for the third variable capacitor, and the first electrode for the fourth variable capacitor are integrally formed.

10. 8. The information communication terminal device according to claim 7, The transmitting means a transmission circuit electrically connected to the first capacitor circuit and the second capacitor circuit; The sliding means is a first contact structure that maintains an electrical connection between the variable capacitor for the first capacitor circuit and the transmission circuit when the variable capacitor for the first capacitor circuit slides in a first direction; a second contact structure that maintains an electrical connection between the variable capacitor for the second capacitor circuit and the transmission circuit when the variable capacitor for the second capacitor circuit slides in the second direction; a guide rail that restricts sliding of the first base material and the third base material in the first direction and the second direction, respectively; An information communication terminal device comprising:

11. an information communication terminal device according to claim 1 or 7; a displacement detection processing device that receives change information transmitted from the information communication terminal device and detects a displacement between at least two substrates based on the received change information; A displacement management system comprising:

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