TWI805616B - Sensor for detecting concrete filling state and measuring moisture temporal change - Google Patents

Abstract

The present invention provides a sensor for detecting concrete filling state and measuring moisture temporal change capable of easily, quickly and accurately detecting the filling/unfilling state and cracks of filled concrete and the moisture temporal change of the filled concrete, from the inside of the surface of a concrete structure to an area at a certain range of depth, which is greatly useful for durability evaluation of concrete building or the likes, and having a structure allowing simple measurement and operation.

The sensor for detecting concrete filling state and measuring moisture temporal change according to the present invention includes: a tubular pipe 2 having a plurality of pipe metal portions 3 arranged in a row at a predetermined pitch while sandwiching an insulating part from the outer circumference to the inner circumference, with the region of the plurality of pipe metal portions being embedded in a concrete structure which is the measured object thereby forming a capacitor region having an electrostatic capacity corresponding to the filling state of the concrete 22 or the moisture temporal changing state of the concrete in the periphery of an area between the plurality of pipe metal portions based on a measurement signal; and a rod-shaped sensor body ll having a plurality of sensor electrodes 12 such formed as to be insertable into the pipe and having the same pitch as the pipe metal portions and having a quantity smaller than the pipe metal portions, the plurality of sensor electrodes being individually brought into contact with the corresponding plurality of pipe metal portions at a state of being inserted into the pipe at an arbitrary depth, and the measurement signal being supplied from the plurality of sensor electrodes to the corresponding plurality of pipe metal portions, so as to detect and output a detection signal corresponding to the electrostatic capacity in the capacitor region.

Description

Sensor for detection of concrete filling and measurement of moisture change over time

The present invention relates to a sensor for detecting concrete filling and measuring the change of moisture over time. The filling state and cracking of the filled concrete, and further detection of the moisture change state of the filled concrete over time, are very useful for the durability evaluation of concrete buildings, etc., and it is constituted as a concrete filling detection, moisture content, etc. that can be easily measured. A sensor for measuring changes over time.

In the field of modern construction, concrete is indispensable for the use of structures such as skeletons of buildings and foundations of houses.

When a building is newly built, it is essential to fill the formwork with concrete. At this time, knowing whether the filling is correct is very important for the quality control of the project.

In addition, in the past, in the maintenance management of existing buildings, the durability of buildings was determined by methods such as "hammer test" and "core removal". The obtained compressive strength and depth of neutralization are evaluated.

In particular, since the moisture in the concrete will affect the neutralization speed and indirectly affect the durability years, it is also related to the measurement of cracking and air permeability coefficient, so it is useful to use moisture measurement in the durability evaluation over time.

In order to grasp the durability and life of buildings more accurately, it is strongly required to measure and observe the concrete filling state, moisture state, and moisture value slope state of concrete walls and the like from the time of pouring to the time after pouring.

Patent Document 1 has disclosed a capacitive moisture content sensor composed of an electrode part, a capacitance detection circuit, and an output part, wherein the electrode part protrudes from the wall surface of the structure that does not contact the detection object toward the detection object. A pair of electrodes arranged in parallel with the electrode surface is formed on the wall surface; the capacitance detection circuit uses the capacitor area formed by the pair of electrodes of the electrode part as the detection area, and detects the capacitance determined by the moisture content existing in the detection area value; the output unit is to output the electric quantity equivalent to the value of the detected capacitance value output by the capacitance detection circuit.

However, in the capacitive moisture content sensor of Patent Document 1, the electrode part is arranged on one side of the wall surface substantially parallel to the electrode surface so as not to protrude from the wall surface of the structure contacting the detection object toward the detection object. In the counter electrode configuration, the capacitor region constituted by the pair of electrodes of the electrode part is used as the detection region of the moisture content. Therefore, it is presumed that the capacitor region, that is, the detection region of the moisture content, can only be formed near the wall surface of the structure.

[Prior Art Literature] (patent documents)

Patent Document 1: Japanese Patent Laid-Open No. 2001-21518

The present invention was developed in view of the above-mentioned circumstances, and provides a concrete filling detection method that can easily, quickly, and accurately detect the depth from the concrete surface to a certain range in addition to the area near the interior of the concrete structure surface. The temporal change of moisture is very useful for the durability evaluation of concrete buildings, etc., and it is configured as a sensor for detecting concrete filling and measuring the temporal change of moisture that can be easily measured.

The most important feature of the sensor for detecting concrete filling and measuring moisture over time of the present invention is that it is a cylindrical tube with a plurality of tube metal parts arranged at predetermined intervals across insulating parts from the outer periphery to the inner periphery. Embedding the plurality of pipe metal part regions in the concrete structure belonging to the object of measurement, and forming an area around the plurality of pipe metal parts according to the filling state of the concrete or the time-dependent change in the moisture content of the concrete based on the measurement signal. Capacitor area of capacitance in the state; a rod-shaped sensing body is formed to be inserted into the aforementioned tube, and has a plurality of components at the same pitch as the aforementioned tube metal portion and less than the aforementioned tube metal portion on the outer peripheral portion. Under the state of inserting the plurality of sensing electrodes into any depth in the aforementioned tube, the plurality of sensing electrodes are individually contacted with the corresponding plurality of tube metal parts, and the aforementioned plurality of sensing electrodes supply measurement signals to the corresponding plurality of sensing electrodes. tube metal part, and detect and output a detection signal corresponding to the capacitance of the aforementioned capacitor region; by means of the detection signal detected by the sensing body, it is possible to measure the filling state of the concrete in the surrounding area where the sensing electrode of the sensing body is inserted or Moisture state corresponding to the change of moisture in concrete over time.

According to the invention described in item 1 of the scope of patent application, a sensor for detecting concrete filling and measuring the change of moisture over time can be realized and provided. The sensor is based on a simple combination of a set of tubes and sensing bodies The structure can easily, quickly and accurately detect the filling status and cracking of the concrete filled from the inside of the surface of the concrete structure to a certain range of depth, and further detect the change of moisture in the filled concrete over time. It is very useful for durability evaluation of concrete buildings, etc., and can be easily measured.

According to the invention described in claim 2 of the patent application, it is possible to realize and provide a sensor for detecting concrete filling and measuring the change of moisture over time. The sensor is based on a pipe having three or more pipe metal parts A simple structure combined with a sensing body having three sensing electrodes is the same as the invention described in claim 1 of the scope of the patent application, and can easily, quickly and accurately detect from the inside to the surface of a concrete structure. It is very useful to evaluate the durability of concrete buildings, etc. by detecting the filling status and cracking of the concrete filled up to a certain range of depth, and the moisture content of the filled concrete over time. It can also be easily measured. .

According to the invention described in item 3 of the scope of patent application, it is The outer peripheral portion of the sensing body described in item 1 or item 2 of the aforementioned patent application is provided with a standard scale portion that becomes the depth of the sensing electrode inserted into the concrete structure, so that a specific depth of the detection area can be realized and provided It is easy to measure the presence or absence of concrete filling and contribute to improving the accuracy of the durability evaluation of concrete buildings, etc. The above-mentioned patent application item 1 or 2 is used for detecting concrete filling and measuring changes in moisture over time sensor.

According to the invention described in claim 4, the outer peripheral portion of the pipe described in claim 3 is provided with a standard for the depth of insertion of the pipe into the concrete structure when the pipe is inserted into the concrete structure. Therefore, in this state, after inserting the sensing body having a scale portion on the outer periphery into the tube, and then wanting to detect any position in the concrete structure, by subtracting each scale portion of the tube and the sensing body, The above-mentioned patent application can make it easier to measure the depth of the detection area at any position where the detection of the state of concrete filling, etc. can be realized and provided to further improve the accuracy of the durability evaluation of concrete buildings, etc. Sensors for detecting concrete filling and measuring changes in moisture over time as described in item 3 of the scope.

According to the invention described in item 5 of the scope of patent application, the sensing electrode of the sensing body described in any one of items 1 to 4 of the scope of patent application is used as a crimping connection in the tube metal part of the aforementioned tube Because of the flexible structure around it, the electrical connection between the sensing electrode and the metal part of the tube can be reliably performed, and the signal transmission of the measurement signal and the detection signal can be accurately carried out, so that the accuracy of the measurement can be realized and provided. The detection of concrete filling and the time-lapse of moisture described in any one of items 1 to 4 of the aforementioned patent application scope Sensors for change measurement.

According to the invention described in item 6 of the scope of patent application, the tube metal part of the tube described in any one of items 1 to 5 of the scope of patent application is formed into an annular shape, a semi-circular shape, or an accessible The size of the sensing electrode of the aforementioned sensing body and any shape of an ellipsoid that makes the outer periphery flush with the outer periphery of the pipe can realize and provide a scattering range that can suppress the electric field from the metal part of the pipe, and is less susceptible to Concrete filling detection and measurement of moisture change over time as described in any one of the above-mentioned patent claims 1 to 5 can also grasp the influence of metal parts such as surrounding steel bars and the inclination of moisture at each depth of the wall surface Use the sensor.

1: Sensors for detecting concrete filling and measuring changes in moisture over time

2, 2A, 2B: pipe

3, 3A, 3B: tube metal part

4: Pipe insulation part

10:Moisture measurement processing device

11: Sensing body

12: Sensing electrode

13, 14: signal line

15: cable

16, 17: scale department

21: Subject

22: Concrete

Cx:capacitance

d: diameter

D1, D3: outer diameter

D2: inner diameter

L: Length

t1, t2: width

t3: Spacing

Fig. 1 is a three-dimensional schematic diagram showing the pipe and sensor body of the sensor for detecting concrete filling and measuring the change of moisture over time according to the embodiment of the present invention.

Fig. 2 is an explanatory diagram showing an example of the dimensions of the outer diameter and inner diameter of the tube, the length of the tube, the dimensions of the metal part of the tube, and the resin part of the tube in this embodiment.

FIG. 3 is an explanatory diagram showing an example of the outer diameter of the sensing body, the diameter of the sensing electrodes, and the arrangement pitch of the sensing electrodes in this embodiment.

Fig. 4 is a schematic cross-sectional view showing the arrangement of the measurement objects of the sensor for detecting concrete filling and measuring the change of moisture with time according to this embodiment in the measurement state.

Fig. 5 is a schematic explanatory diagram showing the overall structure of the sensor for detecting concrete filling and measuring the change of moisture over time in this embodiment, and the principle of moisture measurement in the concrete filling state of the measurement object.

Fig. 6 is a schematic explanatory diagram showing the moisture measurement state of the sensor for detecting concrete filling and measuring the change of moisture over time in the present embodiment in the state of unfilled concrete.

Fig. 7 is a schematic perspective view showing another example of the tube of the sensor for detecting concrete filling and measuring the temporal change of moisture in this embodiment.

Fig. 8 is a schematic perspective view showing yet another example of the tube of the sensor for detecting concrete filling and measuring the change of moisture over time in this embodiment.

The purpose of the present invention is to realize and provide a concrete with a simplified configuration that can detect concrete filling detection and time-dependent changes in moisture from the concrete surface to a certain range of depth in addition to the inner vicinity of the concrete structure surface. A sensor for detecting filling and measuring changes in moisture over time, which is achieved by having the following structure: a cylindrical tube with more than three tubes arranged at predetermined intervals from the outer circumference to the inner circumference with insulating parts interposed therebetween. A plurality of pipe metal parts is embedded in the concrete structure belonging to the object of measurement, and the plurality of pipe metal part regions are formed around the plurality of pipe metal parts according to the filling state or concrete according to the measurement signal. Capacitor area where the capacitance of the moisture changes with time; the rod-shaped sensing body is formed so that it can be inserted into the aforementioned tube and is thinner and longer than the aforementioned tube, and has the same spacing as the aforementioned tube metal part on the outer periphery and is smaller than the aforementioned tube metal part. The three sensing electrodes with a small number of parts are inserted into the aforementioned tube at any depth, and the three sensing electrodes are individually contacted with the corresponding three tube metal parts, and the aforementioned three sensing electrodes are used for measurement. signal to the corresponding three tube metal parts, detect and output corresponding to the aforementioned capacitor The detection signal of the capacitance of the region; and the moisture measurement processing device, which supplies the measurement signal to the pipe metal part of the aforementioned pipe via the 3 sensing electrodes of the aforementioned sensing body, and obtains the detection signal detected by the aforementioned sensing body to measure The filling state of the concrete in the surrounding area where the three sensing electrodes of the sensing body are inserted or the moisture state corresponding to the temporal change of the moisture content of the concrete.

[Example]

Hereinafter, the sensor for detecting concrete filling and measuring the change of moisture over time according to the embodiment of the present invention will be described in detail with reference to the drawings.

As shown in Figure 1, the sensor 1 for detecting concrete filling and measuring the change of moisture over time in this embodiment has: a cylindrical tube 2 with a bottom, made of metal and resin composite materials, and loaded (embedded) The main body 21 filled with concrete 22 in the building belonging to the measurement object; the capacitive round rod-shaped sensing body 11 is inserted into the pipe 2 from the opening of the aforementioned pipe 2, and the filling of the concrete 22 in the aforementioned main body 21 is detected. The detection signal is obtained by detecting and changing the moisture over time; the moisture measurement processing device 10 is connected to the rear end of the aforementioned sensing body 11 via the cable 15, and measures the filling state of the aforementioned concrete 22 or the moisture content of the concrete 22 based on the aforementioned detection signal. The water state corresponding to the time-varying state.

Next, the tube 2 and the sensing body 11 will be described in detail with reference to FIG. 2 and FIG. 3 .

The aforementioned pipe 2 is as shown in FIG. 2, formed by metal and resin composite materials, such as a bottomed cylinder with an opening on the rear end side, and the dimensions of each part are set to length L (for example, 72mm), outer diameter D1 (eg 13mm), inner diameter D2 (eg 11mm).

In addition, the pipe 2 is provided with a plurality of (for example, nine) annular pipe insulating parts 4 arranged at predetermined intervals across a plurality of (for example, eight) annular pipe insulating parts 4 from its outer periphery to the inner periphery. Metal part 3. In addition, one tube insulating portion 4 is continuously provided on the opening end side of the tube 2 .

The staggered arrangement structure of the above-mentioned tube metal parts 3 and tube insulating parts 4 is to suppress the scattering range of the electric field and not be easily affected by the metal parts such as surrounding steel bars, and to grasp the moisture gradient at each depth of the wall surface.

Furthermore, as shown in the representative example in FIG. 1 , on the outer peripheral portion of the pipe 2 , a standard scale portion 17 for the depth of insertion into the main body 21 is provided. In the example in FIG. 1 , the pitch, shape, and display position of the scale portion 17 are not limited, and any pitch, shape, and display position can be set.

By providing such a scale portion 17, when it is desired to detect any position in the concrete structure, it is easier to measure the depth of the detection area for detecting whether the concrete is filled or not, and it is helpful to further improve the safety of concrete buildings and the like. Correctness of durability assessment.

That is, since the outer peripheral portion of the aforementioned pipe 2 is provided with the standard scale portion 17 that becomes the depth of the pipe 2 inserted into the concrete structure when the pipe 2 is inserted into the concrete structure, in this state, as will be described later, the outer periphery will have After the sensing body 11 of the scale part 16 is inserted into the pipe 2, when it is desired to detect any position in the concrete structure, by subtracting the sensing body 11 and the respective scale parts 16 and 17 of the pipe 2, it is possible to detect whether the concrete is filled or not. It becomes easier to measure the depth of the detection area at any position in the state, etc., which contributes to further Improve the accuracy of durability evaluation of concrete buildings, etc.

In addition, illustration of the scale part 17 is abbreviate|omitted in 2nd figure, 4th figure, 5th figure, and 6th figure.

The width t1 in the longitudinal direction of the pipe metal portion 3 is set to, for example, 3 mm, and the width t2 in the longitudinal direction of the pipe insulating portion 4 is set to, for example, 5 mm.

Thereby, the distance between the centers of two adjacent pipe metal parts 3 , that is, the arrangement pitch of the pipe metal parts 3 , is set to, for example, 8 mm.

On the other hand, as shown in FIG. 3 , the sensing body 11 has its outer diameter D3 set to, for example, 11 mm so that it can be inserted into the tube 2 .

In addition, in a part of the outer periphery of the front end side of the sensing body 11, three sensing elements with a pitch t3 (equal to 8 mm) and a diameter d of about 3 mm are formed so as to be at the same pitch as the tube metal part 3. The electrodes 12 are provided to have elasticity and protrude outward from the outer periphery of the sensing body 11 (on the side of the aforementioned tube metal portion 3 ).

The elasticity of the sensing electrodes 12 is, for example, a small-sized coil spring embedded in the base of the aforementioned sensing body 11 of each sensing electrode 12 which is not shown in the figure. By applying the elastic force of the coil spring to the sensing electrode 12 to achieve.

In addition, in the state where the sensing body 11 is inserted into the aforementioned tube 2, the tops of the three sensing electrodes 12 of the aforementioned sensing body 11 are respectively crimped (elastically contacted) with the corresponding three tubes of the aforementioned tube 2. metal part 3 The inner surface of the surface must be in contact with each other.

Thereby, the electrical connection between the sensing electrode 12 and the pipe metal part 3 can be reliably performed, the signal transmission of the measurement signal and the detection signal can be performed accurately, and the accuracy of the measurement can be expected.

Next, with reference to Fig. 4 and Fig. 5, the specific configuration of the sensor 1 for detecting concrete filling and measuring the change over time of moisture in this embodiment, as well as the measurement state and measurement of the concrete 22 in the main body 21 belonging to the object to be measured will be described. principle.

The three sensing electrodes 12 of the sensing body 11 are connected to the moisture measurement processing device 10 via the two signal lines 13 and 14 built in the cable 15 .

That is, as shown in FIG. 5, among the aforementioned two signal lines 13, 14, one end of one of the signal lines 13 is connected to the aforementioned moisture measurement processing device 10, and the other end is connected to three sensing electrodes via a cable 15. The central sensing electrode 12 among 12.

In addition, one end of the other signal line 14 is connected to the aforementioned moisture measurement processing device 10 , and the other end is commonly connected to the two sensing electrodes 12 , 12 on both sides of the three sensing electrodes 12 via the cable 15 .

Furthermore, as shown in the representative example in FIG. 4 , on the outer peripheral portion of the sensing body 11 , there is provided a standard scale portion 16 to be inserted into the main body 21 of the sensing electrode 12 . In the examples in FIG. 1 and FIG. 4 , the pitch, shape, and display position of the scale portion 16 are not limited, and any pitch, shape, and display position can be set.

By setting this scale portion 16, it is possible to detect concrete The measurement of the depth of the detection area for the presence or absence of filling becomes easier, which contributes to improving the accuracy of the durability evaluation of concrete buildings and the like.

In addition, illustration of the scale part 16 is abbreviate|omitted in 3rd figure, 5th figure, and 6th figure.

The moisture measurement of the concrete 22 in the main body 21 is performed with the arrangement shown in FIG. 4 based on the above-mentioned constitution.

That is, firstly, the aforementioned pipe 2 is buried in the region where the concrete 22 in the main body 21 exists.

Next, the front end side of the sensing body 11 is inserted into the tube 2 , and the three sensing electrodes 12 are respectively crimped to the corresponding three tube metal parts 3 provided on the tube 2 in the tube 2 .

Then, the moisture measurement processing device 10 is operated, and the measurement signals (high frequency AC pulse signal) to the aforementioned concrete 22.

Thereby, a capacitor area (shown in Fig. 5 as a dotted arc line) is formed in the surrounding area of the three pipe metal parts 3 in the aforementioned concrete 22 according to the aforementioned measurement signal, and the three sensors of the aforementioned sensing body 11 The measuring electrode 12 can detect a detection signal based on the capacitance Cx of the capacitor region between the three pipe metal parts 3 in the concrete 22 corresponding to the filling state of the concrete 22 or the time-varying state of the moisture content of the concrete 22 .

The detection signal is transmitted to the moisture measurement processing device 10 through the aforementioned two signal lines 13, 14, and the moisture measurement processing device 10 can measure the filling state of the aforementioned concrete 22 or the moisture content of the concrete 22. The change over time corresponds to the first information of the moisture content of the concrete 22 .

More specifically, in the sensor 1 for detecting concrete filling and measuring the change of moisture over time in this embodiment, the aforementioned detection signal is basically only the count value of the index belonging to the capacitance Cx, and the count value is converted to use The moisture content is first measured by the moisture measurement processing device 10 .

In the case of raw concrete, the capacitance value is very high. As shown in Figure 6, in the measurement of the unfilled state of the concrete, the capacitance Cx, that is, the corresponding moisture content becomes very low, and the concrete filling state, unfilled state can be detected and measured. filling state.

Furthermore, when the above-mentioned water content has a discontinuous area with high or low areas relative to the continuous range of a certain area, it can be presumed that the area may be cracked.

From the above, according to the sensor 1 for detecting concrete filling and measuring the change of moisture over time according to this embodiment, apart from the moisture content, the cracked part can also be predicted.

In addition, the sensor 1 for detecting concrete filling and measuring moisture over time according to this embodiment can also directly perform filling detection when it is used to form the concrete pouring of the aforementioned main body 21 .

That is, the pipe 2 is fixed to the formwork for constituting the main body 21 before pouring, and the sensor 1 for detection of concrete filling and measurement of moisture over time is started in a state where the sensing body 11 is inserted into the pipe 2 action and pour the concrete.

As a result, the capacitance Cx becomes very high in the fresh concrete filling state and very low in the hollow state, using this The gap detects the filling condition of the concrete in the area around the pipe 2 .

Fig. 7 shows a tube 2A as another example of the aforementioned tube 2. Its basic structure is the same as that of the aforementioned tube 2, but the plurality of tube metal parts 3A of the aforementioned tube 2A respectively form a semicircular shape, and each tube metal The outer sides of both ends of the portion 3A and the respective pipe metal portions 3A are insulated by the pipe insulating portion, and are arranged at the same arrangement pitch as in the case of the pipe 2 described above.

Fig. 8 shows a tube 2B which is still another example of the aforementioned tube 2. Its basic structure is the same as that of the aforementioned tube 2, but the plurality of tube metal parts 3B of the aforementioned tube 2B respectively form an ellipsoid, and each of the tubes The outsides of both ends of the metal part 3B and the respective tube metal parts 3B are insulated by the tube insulating part, and are arranged at the same arrangement pitch as in the case of the tube 2 described above.

The tube metal portion 3B has a size capable of contacting the inner surface of the sensing electrode 12 of the sensing body 11, and is arranged such that its outer periphery is flush with the outer periphery of the tube 2B.

Using the tube 2A shown in FIG. 7 or the tube 2B shown in FIG. 8 can also exert the same function and effect as in the case of the tube 2 shown in FIG. 1 and FIG. 2 .

In addition, the shape of the metal part of the pipe is not limited to the above-mentioned examples, as long as the shape of the metal part can contact the sensing electrode, various deformations can be implemented.

According to the present embodiment described above, it is possible to realize and provide a sensor 1 for detecting concrete filling and measuring changes in moisture over time. Simple, rapid and accurate detection of selected areas such as concrete walls Whether the concrete is filled or cracked can further detect the water content of the filled concrete 22 over time, which is very useful for the durability evaluation of buildings and the like, and can also realize the simplicity of the measurement operation.

[industrial availability]

The sensor for detecting concrete filling and measuring water changes over time of the present invention can not only be used in the above situations, but also can be widely used in the detection of moisture in farmland soil, and can be used to detect moisture in the soil of lawns such as cultivation parks and golf courses. , Various fields such as moisture detection of cereals, pastures, and wood chips.

1: Sensors for detecting concrete filling and measuring changes in moisture over time

2: tube

3: Pipe metal part

4: Pipe insulation part

10:Moisture measurement processing device

11: Sensing body

12: Sensing electrode

13: Signal line

14: Signal line

15: cable

21: Subject

22: Concrete

Cx:capacitance

Claims (6)

A sensor for detection of concrete filling and measurement of moisture change over time, comprising: a cylindrical tube with a plurality of tube metal parts arranged at predetermined intervals across insulating parts from the outer circumference to the inner circumference, belonging to the measurement In the concrete structure of the target object, the plurality of pipe metal part regions are embedded, and the capacitance corresponding to the filling state of the concrete or the time-dependent change state of the water content of the concrete is formed around the plurality of pipe metal parts based on the measurement signal. The capacitor region and the rod-shaped sensing body are formed so as to be inserted into the tube, and are equipped with a plurality of sensing electrodes at the same pitch as the metal part of the tube and a smaller number than the metal part of the tube on the outer peripheral part. , in the state of being inserted into the aforementioned tube at any depth, make the plurality of sensing electrodes contact the corresponding plurality of tube metal parts individually, and supply measurement signals from the aforementioned plurality of sensing electrodes to the corresponding plurality of tube metal parts, Detect and output a detection signal corresponding to the capacitance of the aforementioned capacitor region; by means of the detection signal detected by the aforementioned sensing body, the filling state of the concrete in the surrounding area where the sensing electrode of the sensing body is inserted or the relationship with the concrete can be measured. The moisture state corresponding to the change of moisture over time. A sensor for detecting concrete filling and measuring moisture changes over time, comprising: a cylindrical tube having a plurality of more than three tube metal parts arranged at predetermined intervals with insulating parts interposed therebetween from the outer periphery to the inner periphery, Embedding the above-mentioned plurality of pipe metals in the concrete structure belonging to the measurement object region, and form a capacitor region with capacitance corresponding to the filling state of concrete or the time-varying state of moisture in concrete around the plurality of pipe metal parts according to the measurement signal; and the rod-shaped sensing body is formed as It can be inserted into the tube and is thinner and longer than the tube, and has three sensing electrodes on the outer periphery at the same pitch as the metal part of the tube and less than the number of metal parts of the tube, in the state of being inserted into the tube at any depth Next, the three sensing electrodes are individually contacted with the corresponding three tube metal parts, and the measurement signals are supplied from the aforementioned three sensing electrodes to the corresponding three tube metal parts, and the capacitance corresponding to the aforementioned capacitor area is detected and output The detection signal of the moisture measurement processing device supplies the measurement signal to the pipe metal part of the aforementioned pipe via the three sensing electrodes of the aforementioned sensing body, and obtains the detection signal detected by the aforementioned sensing body to measure the aforementioned sensing body The filling state of the concrete in the surrounding area where the three sensing electrodes are inserted or the moisture state corresponding to the temporal change of the moisture content of the concrete. The sensor for detecting concrete filling and measuring the change of moisture over time as described in item 1 or item 2 of the scope of the patent application, wherein a sensor for inserting the sensing electrode into the concrete structure is provided on the outer periphery of the sensing body. Standard scale section of depth. The sensor for detecting the filling of concrete and measuring the change of moisture over time as described in item 3 of the scope of the patent application, wherein, when the tube is inserted into the concrete structure, a sensor for inserting the tube into the concrete structure is provided on the outer periphery of the tube. Standard scale section of depth. The concrete filling probe described in item 1 or item 2 of the scope of patent application A sensor for measuring changes in moisture over time, wherein the sensing electrode of the sensing body is made of an elastic structure that is crimped to the inner circumference of the tube metal portion of the tube. The sensor for detecting concrete filling and measuring the change of moisture over time as described in item 1 or item 2 of the scope of the patent application, wherein the tube metal part of the aforementioned tube is formed into a ring shape, a semi-ring shape, or has a contactable The sensing body may be any one of an ellipsoid shape in which the size of the sensing electrode is the same as the outer periphery of the sensing body is flush with the outer periphery of the tube.

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