JP2017049061A - Device and method for probing buried object - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately detect a position of an arbitrary buried object by discriminating it from another buried object, even when the buried object is approaching and embedded in a dielectric body.SOLUTION: Provided is a buried object probing device 10 for probing a buried object existing inside a concrete structure 1 by transmitting/receiving an electromagnetic wave 2 to/from the inside of the concrete structure. The buried object probing device includes: signal generating means 11 for generating a high frequency signal; electromagnetic wave transmitting means 12 comprising a plurality of electromagnetic wave transmitters 20 for dispatching and transmitting electromagnetic waves on the basis of the high frequency signal from the signal generating means and propagating the electromagnetic waves inside the concrete structure; electromagnetic wave receiving means 13 for receiving an electromagnetic wave reflected by a buried object, as a high frequency signal; and buried object position calculating means 16 for calculating a position of the buried object from a signal level of the high frequency signal from the electromagnetic wave receiving means and propagation time of the electromagnetic wave. In the buried object probing device, the electromagnetic wave transmitters 20 respectively is set by phase inputting means 18 so that timing at which the electromagnetic waves are dispatched is different, and a region with high intensity of the electromagnetic waves propagating inside the concrete structure is concentratedly distributed.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to a buried object searching apparatus and method for searching a buried object existing in a dielectric by transmitting and receiving radio waves in a dielectric such as concrete and soil.

  Arrangement of buried objects such as reinforcing bars and conduits in concrete structures such as buildings and bridges are not designed or have design drawings, but they have been constructed according to the drawings due to changes during construction. There may not be. In addition, buried objects such as water pipes and electric wires buried in roads and the like are also changed by additional work, and it may be difficult to grasp an accurate position with drawings or the like.

  Therefore, in order to confirm the depth, size, number, etc. of buried objects, exploration technology using electromagnetic induction method, electromagnetic wave radar method, X-ray transmission imaging method, etc. is applied, and among these, exploration technology using electromagnetic waves It has been known.

JP-A-9-88351

  In the exploration technology using electromagnetic induction, electromagnetic wave, ultrasonic wave, etc., the depth and horizontal position of the buried object at the shallowest position (first stage) from the exploration surface can be detected, but when the buried object is close However, since reflected waves from a plurality of buried objects are detected, there is a problem that each buried object cannot be separated and accurately detected. Further, since radiation such as X-rays is transmitted, there is a problem that the position in the depth direction of the embedded object cannot be determined.

  The object of the embodiment of the present invention is made in consideration of the above-mentioned circumstances, and even when the embedded object is embedded in the dielectric, It is an object of the present invention to provide a buried object search apparatus and method which can be separately detected and searched separately from the buried object.

  An embedded object exploration apparatus according to an embodiment of the present invention generates a high-frequency signal in an embedded object exploration apparatus for exploring an embedded object existing in the dielectric by transmitting and receiving radio waves into and from a dielectric including concrete and soil. A signal generator, a radio wave transmitter having a plurality of radio wave transmitters for transmitting a radio wave based on a high-frequency signal from the signal generator and transmitting the radio wave into the dielectric, and the buried object A radio wave receiving means for receiving a reflected radio wave to obtain a high frequency signal, a signal level of the high frequency signal from the radio wave receiving means, and a radio wave signal from the transmission by the radio wave transmission means to the reception by the radio wave reception means. Embedded object position calculating means for calculating the position of the embedded object in the dielectric from the propagation time, and each of the radio wave transmitting units has a timing of transmitting a radio wave. So as to be set by the phase input means, is characterized in that the radio waves of high intensity regions propagating through the dielectric in configured to distribute a concentrated manner.

  An embedded object exploration method according to an embodiment of the present invention includes a plurality of radio wave transmission means in an embedded object exploration method for exploring an embedded object existing in a dielectric by transmitting and receiving radio waves into a dielectric including concrete and soil. When the radio wave transmitting unit transmits a radio wave, the radio wave is transmitted and propagated in the dielectric, and the radio wave receiving means receives the radio wave reflected from the embedded object to obtain a high frequency signal. The position of the embedded object in the dielectric is calculated from the signal level of the high-frequency signal and the propagation time of the radio wave from the transmission by the radio wave transmitting means to the reception by the radio wave receiving means. When detecting and exploring, set different timings for transmitting radio waves from each of the radio wave transmitters, and concentrate high intensity areas of radio waves propagating in the dielectric Is characterized in that the distributing Te.

  According to the embodiment of the present invention, even when an embedded object is embedded close to the dielectric body, the position of an arbitrary embedded object is accurately detected separately from other embedded objects. it can.

The block diagram which shows the structure of the buried object search apparatus which concerns on 1st Embodiment. The perspective view which shows the example of a search of the concrete structure by the buried object search apparatus of FIG. Sectional drawing which shows the positional relationship of the electromagnetic wave transmission means in the example of a search of FIG. 2, an electromagnetic wave reception means, and the embedded object in a concrete structure. The contour figure which displayed the search result by the buried object search apparatus of FIG. 1 two-dimensionally. The block diagram which shows the phase input means etc. which are connected to the electromagnetic wave transmission part of the electromagnetic wave transmission means of FIG. The graph which shows the example of the difference (phase difference) of the electromagnetic wave transmission timing of the some electromagnetic wave transmission part which the phase input means of FIG. 5 sets. The intensity distribution of the electric wave which propagates in the concrete structure of FIG. 1 is shown, and the case where the radio wave transmission timings from the plurality of radio wave transmission parts are equal is (A), and the case where the radio wave transmission timing is the curve P1 of FIG. ) Respectively. (A) is a graph showing another example of the difference (phase difference) in radio wave transmission timings of a plurality of radio wave transmission units set by the phase input means in FIG. 5, and (B) is a radio wave transmission from a plurality of radio wave transmission units. The figure which shows intensity distribution of the electromagnetic wave which propagates in the concrete structure in case a timing is FIG. 8 (A). The block diagram which shows the phase input means in the buried object search apparatus which concerns on 2nd Embodiment with a radio wave transmission means etc. FIG. Explanatory drawing which shows the wiring of different length as an example of the signal delay means in the phase input means of FIG. FIG. 10 shows another example of the signal delay means in the phase input means of FIG. 9, (A) is an explanatory diagram showing a case where the wiring length is increased, and (B) is an explanatory diagram showing a case where the wiring length is reduced.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
[A] First embodiment (FIGS. 1 to 8)
FIG. 1 is a block diagram showing the configuration of the buried object searching apparatus according to the first embodiment. FIG. 2 is a perspective view showing an example of exploring a concrete structure by the buried object exploration device of FIG. The buried object exploration device 10 shown in FIGS. 1 and 2 is for exploring the buried object 3 existing in the concrete structure 1 by transmitting and receiving radio waves 2 to and from a dielectric such as the concrete structure 1. Yes, the signal generation means 11, the radio wave transmission means 12, the radio wave reception means 13, the analog / digital conversion means 14, the signal recording means 15, the buried object position calculation means 16, the two-dimensional signal processing / recording means 17, and the phase input means 18 are provided. It is configured.

  Here, in addition to the concrete structure (concrete) 1, the dielectric that transmits and receives the radio wave 2 includes at least one of soil, asphalt, sand, rubber, vinyl chloride resin, plastic, and ceramic. The buried object 3 is a reinforcing bar or a conduit when the dielectric is the concrete structure 1, and is a water pipe or an electric wire when the dielectric is soil, sand, or asphalt.

  The signal generation means 11 generates a high frequency signal (more precisely, a high frequency voltage signal) with a frequency of several GHz (for example, 1 GHz to 6 GHz), and outputs the generated high frequency signal to the radio wave transmission means 12 by a cable or wirelessly. .

  The radio wave transmission means 12 is configured by a plurality of (for example, 16) radio wave transmission units 20 arranged in parallel to the exploration surface 1A of the concrete structure 1, for example. Each of the radio wave transmitting units 20 transmits a radio wave 2 having a frequency of several GHz (for example, 1 GHz to 6 GHz) based on a high frequency signal input from the signal generating unit 15 via the phase input unit 18 (detailed later). Furthermore, these signal transmission parts 20 contact the exploration surface 1A of the concrete structure 1 and transmit the radio wave 2 into the concrete structure 1 in a direction substantially perpendicular to the exploration surface 1A. The radio wave 2 is propagated inside.

  As shown in FIG. 3, the radio wave receiving means 13 is arranged, for example, in parallel with the exploration surface 1 </ b> A of the concrete structure 1 at a predetermined interval from the radio wave transmission means 12, and constitutes an antenna 21 together with the radio wave transmission means 12. To do. The radio wave 2 transmitted into the concrete structure 1 by the radio wave transmission means 12 propagates through the concrete structure 1 and is reflected by the buried object 3, and propagates through the concrete structure 1 in this reflection direction. The radio wave receiving means 13 receives the radio wave 2 propagated in the reflection direction and converts it into a high frequency signal (more precisely, a high frequency voltage signal representing waveform data).

  The analog / digital conversion means 14 converts a high frequency signal as an analog signal from the radio wave reception means 13 into a digital signal. The signal recording means 15 records the high frequency signal converted into a digital signal by the analog / digital conversion means 14 as a waveform data signal. Further, in the signal recording means 15, the timing when the phase input means 18 inputs the high frequency signal generated by the signal generation means 11 to the first radio wave transmission section 20 among the plurality of radio wave transmission sections 20 of the radio wave transmission means 12. Information or timing information of radio wave transmission from the radio wave transmission unit 20 that first transmits the radio wave 2 among the plurality of radio wave transmission units 20 of the radio wave transmission unit 12 is recorded.

  The buried object position calculating means 16 receives the signal level of the high frequency signal (waveform data signal) recorded in the signal recording means 15 and the radio wave receiving means 13 after being transmitted by the radio wave transmitting unit 20 of the radio wave transmitting means 12. The position of the buried object 3 in the concrete structure 1 is calculated from the time difference (that is, the propagation time) of the radio wave 2 until. That is, the buried object position calculating means 16 is based on the radio wave 2 reflected from the buried object 3 when the signal level of the high frequency signal recorded in the signal recording means 15 has a certain level or higher. Judge that there is.

  Further, the embedded object position calculating means 16 receives the radio wave 2 from the radio wave transmitting unit 20 of the radio wave transmitting means 12 from the timing information recorded in the signal recording means 15 and the reception information of the radio wave 2 received by the radio wave receiving means 13. The propagation time (time difference) of the radio wave 2 from when the radio wave is transmitted until the radio wave receiving means 13 receives the radio wave is calculated. Here, since the radio wave 2 is generally propagated at a speed depending on the dielectric constant of the dielectric, the propagation speed of the radio wave 2 is calculated in advance from the dielectric constant of the concrete structure 1. Therefore, the buried object position calculating means 16 calculates the distance from the exploration surface 1A of the concrete structure 1 where the antenna 21 is arranged to the buried object 3 from the propagation speed of the radio wave 2 and the propagation time (time difference) of the radio wave 2. By calculating, the position of the buried object 3 existing in the concrete structure 1, that is, the depth information of the buried object 3 is calculated.

  The two-dimensional signal processing / recording means 17 scans at least one of the radio wave transmission means 12 and the radio wave reception means 13 in parallel with the exploration surface 1A of the concrete structure 1 as shown in the scanning direction S of FIG. The signal level (signal intensity) of the high-frequency signal based on the radio wave 2 reflected by the buried object 3 and received by the radio wave receiving means 13 at the recording point for each position change at that time, and the buried object position calculating means The position (depth information) of the embedded object 3 calculated by 16 is acquired. Further, the two-dimensional signal processing / recording means 17 processes the acquired signal intensity and depth information to obtain two-dimensional information indicating the position of the buried object 3 in the concrete structure 1, and this two-dimensional signal The information is displayed and recorded as a contour diagram 22 shown in FIG. 4 on a display device (not shown) of the two-dimensional signal processing / recording means 17. In this contour diagram 22, since the magnitude of the strength of the high-frequency signal from the radio wave receiving means 13 is expressed by shading, it is indicated that the embedded object 3 exists in the dark portion 23 of this contour diagram 22.

As shown in FIG. 5, a plurality of phase input means 18 are provided corresponding to the radio wave transmission unit 20, and each is connected to one radio wave transmission unit 20 and to the signal generation unit 11. When exploring the buried object 3 in the concrete structure 1, each of the radio wave transmission units 20 of the radio wave transmission unit 12 is set by the phase input unit 18 so that the timing (phase) of transmitting the radio wave 2 is different. . Thereby, the radio wave 2 propagating through the concrete structure 1 becomes stronger as there is an overlap. The high-intensity region of the radio wave 2 is concentrated and distributed toward an arbitrary position (a radio wave focusing point described later) in the concrete structure 1, and the radio wave 2 propagating through the concrete structure 1 has high directivity. It is configured to have propagation characteristics. That is, the phase input means 18 sets the phase difference between the waveforms of the radio waves 2 transmitted from all the radio wave transmission units 20 so as to overlap when propagating a set distance.

  That is, the phase input unit 18 is, for example, a delay circuit that sets a delay time for the high-frequency signal from the signal generation unit 11 and inputs the high-frequency signal from the signal generation unit 11 to the radio wave transmission unit 20. The timing (phase) at which the radio wave 2 is transmitted to the plurality of radio wave transmission units 20 is made different by setting the set time to a different value in each radio wave transmission unit 20. For example, the phase input unit 18 sets the timing (phase) at which each of the plurality of radio wave transmission units 20 transmits the radio wave 2 to the central position O in the arrangement direction of the radio wave transmission units 20 as indicated by a curve P1 in FIG. Set differently (shifted) so that they are symmetrical.

  The radio wave 2 transmitted with the phase shifted and transmitted into the concrete structure 1 has an increased intensity at a portion where the phases coincide with each other, and an intensity of zero at the portion where the phases are inverted. Accordingly, the timing (phase) at which each of the radio wave transmitting units 20 transmits the radio wave 2 is set to be symmetric with respect to the center position O in the arrangement direction of the radio wave transmitting units 20 as shown by a curve P1 in FIG. When this is done, the radio waves 2 propagating through the concrete structure 1 are within a region of a substantially triangle M having a focal point A on the center position O in the arrangement direction of the radio wave transmitters 20 as shown in FIG. The portions with high radio wave intensity are concentrated, and the radio wave intensity is low outside the area of the substantially triangle M, and the focal point A becomes a radio wave converging position where the radio waves 2 gather, and the propagation characteristics have high directivity. The distance from the search surface 1A of the concrete structure 1 to the radio wave focusing position A is the radio wave focusing depth La.

  Here, FIG. 7A shows the radio wave 2 transmitted from the radio wave transmitting units 20 into the concrete structure 1 when the radio wave transmitting units 20 transmit the radio waves 2 at the same timing (phase). Intensity distribution. In this case, the intensity of the radio wave 2 becomes the same level at the same depth in the concrete structure 1, and the radio wave 2 propagates in the concrete structure 1 in a state of spreading in parallel with the exploration surface 1A and does not converge.

  Moreover, if each of the radio wave transmission units 20 sets a timing shift (phase difference) at which the radio wave 2 is transmitted as shown by curves P2 and P3 larger than the curve P1 in FIG. The propagation characteristic of the radio wave 2 is a high directivity propagation characteristic with the point B and the point C in FIG. Thus, by changing the deviation (phase difference) of the transmission timing of the radio wave 2 by the plurality of radio wave transmission units 20, it is possible to arbitrarily set the radio wave focusing position in the concrete structure 1, that is, the radio wave focusing depth La. It becomes possible.

  In the actual exploration by the buried object exploration device 10, the phase input means 18 for setting the deviation (phase difference) of the radio wave transmission timing by each of the radio wave transmission units 20 to the curve P1 in FIG. 6, for example, and the phase to the curve P2 in FIG. A plurality of types of phase input means 18 are prepared like the input means 18 and the phase input means 18 having the curve P3 in FIG. Then, by changing the type of the phase input means 18 every time at least one of the radio wave transmission means 12 and the radio wave reception means 13 is scanned, the radio wave focusing positions A, B, C ... performs different scans. As a result, only the buried object 3 existing at the radio wave focusing positions A, B, C... Can be separated from the buried object 3 existing at other positions and detected pinpointed.

  Incidentally, in the exploration by the above-described buried object exploration device 10, instead of preparing a plurality of types of phase input means 18, the deviation (phase difference) of the radio wave transmission timing by the radio wave transmission unit 20 is represented by, for example, the curves P1, P2 in FIG. , P3... May be used to adjust the phase input means 18 that can be adjusted. Specifically, when the phase input means 18 is a delay circuit, the delay setting time is changed for each scan to change the radio wave transmission timing shift (phase difference) by each of the radio wave transmission units 20. Each scan may be performed.

  Further, in this embodiment, as shown in FIG. 7B, the propagation characteristics of the radio wave 2 propagating through the concrete structure 1 is the exploration of the concrete structure 1 from the central position O in the arrangement direction of the radio wave transmitter 20. It has directivity along the depth direction perpendicular to the surface 1A. On the other hand, the radio wave 2 propagating through the concrete structure 1 is obtained by changing the timing shift (phase difference) at which each of the radio wave transmission units 20 transmits the radio wave 2 as indicated by a curve Q in FIG. The directivity may be oblique to the depth direction of the concrete structure 1.

  Here, the curve Q is a predetermined distance from the center position O in the arrangement direction of the radio wave transmitting units 20 to the one side with respect to the curves P1, P2, and P3 in FIG. The radio wave transmission unit 20 in the vicinity of the position R that is far away from the radio wave transmission timing when the transmission timings of the radio waves 2 are sequentially shifted as the plurality of other radio wave transmission units 20 move away from the radio wave transmission unit 20 in the vicinity of the position R. Deviation (phase difference).

With the configuration as described above, according to the first embodiment, the following effects (1) and (2) are obtained.
(1) As shown in FIGS. 5 to 8, each of the plurality of radio wave transmission units 20 in the radio wave transmission unit 12 is set so that the timing (phase) at which the radio wave 2 is transmitted by the corresponding phase input unit 18 is different. Therefore, the high intensity region of the radio wave 2 propagating through the concrete structure 1 is concentrated and distributed in, for example, the approximate triangle M in FIG. 7B, and the radio wave 2 is transmitted to the radio wave focusing positions A, B, C. Can be focused. For this reason, since the radio wave 2 propagating through the concrete structure 1 can be given high directivity, only the buried object 3 existing at the radio wave focusing positions A, B, C... In the concrete structure 1 is detected. it can. As a result, even if the embedded object 3 is embedded in the concrete structure 1 in close proximity, the depth and the horizontal position of the arbitrary embedded object 3 are separated from the other embedded objects 3 and high resolution is achieved. Can be detected and explored accurately.

  (2) As shown in FIG. 8 (A), the radio wave transmitting unit 20 that first transmits the radio wave 2 is arbitrarily positioned near a position R that is a predetermined distance away from the central position O in the arrangement direction of the radio wave transmitting units 20 on one side. When the transmission timing of the radio wave 2 is sequentially shifted as the plurality of other radio wave transmission parts 20 move away from the radio wave transmission part 20 near the position R, as shown in FIG. In addition, the radio wave 2 propagating from the plurality of radio wave transmitting units 20 into the concrete structure 1 has directivity in an oblique direction with respect to the depth direction perpendicular to the exploration surface 1A of the concrete structure 1.

  When at least one of the radio wave transmission means 12 and the radio wave reception means 12 is scanned with respect to the concrete structure 1, the radio wave 2 transmitted from the radio wave transmission unit 20 of the radio wave transmission means 12 and propagating through the concrete structure 1 is generated. As described above, by having an oblique directivity with respect to the depth direction of the concrete structure 1, a plurality of buried objects 3 existing in the depth direction of the concrete structure 1 are simultaneously detected by one scanning. Can be explored.

[B] Second Embodiment (FIGS. 9 to 11)
FIG. 9 is a block diagram showing the phase input means together with the radio wave transmission means etc. in the buried object searching apparatus according to the second embodiment. In the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description is simplified or omitted.

  The embedded object searching device 30 of the second embodiment is different from the second embodiment in the configuration of the phase input means 31, and this phase input means 31 is configured to include a signal dividing unit 32 and a signal delay means 33. .

  That is, a plurality of signal division units 32 are provided corresponding to the radio wave transmission unit 20 of the radio wave transmission unit 12, and each is connected to the signal generation unit 11. These signal dividers 32 divide the high-frequency signal input from the signal generator 11 according to each of the radio wave transmitters 20.

  A plurality of radio wave delay units 33 are provided corresponding to the radio wave transmission unit 20 of the radio wave transmission unit 12, and each is connected to each of the signal dividing unit 32 and each of the radio wave transmission units 20. The signal delay means 33 delays the arrival time when the high-frequency signal input from the signal generation means 11 via the signal division section 32 is made to reach the radio wave transmission section 20. By making this delay different in each radio wave transmission unit 20, the timing (phase) at which each radio wave transmission unit 20 transmits the radio wave 2 becomes different.

  As shown in FIG. 10, the signal delay means 33 is a wiring 34 such as a signal line or a cable having a different length for connecting the signal division unit 32 and the radio wave transmission unit 20. The signal delay means 33 may have a fixed length as in the wiring 34 in FIG. 10 and may be set with a fixed timing (phase) at which the radio wave transmission unit 20 transmits the radio wave 2. Further, as shown in FIG. 11, the signal delay means 33 is configured such that the length of the wiring 34 can be changed, and the timing (phase) at which the radio wave transmission unit 20 transmits the radio wave 2 is changed and adjusted. But you can. Here, in the wiring 34 shown in FIG. 11, for example, when the solid cable 35B goes in and out of the hollow cable 35A, the wiring length of the wiring 34 becomes longer (FIG. 11A) or shorter (FIG. 11). (B)).

  As described above, each of the signal delay means 33 in the phase input means 31 changes the time at which the high-frequency signal from the signal generation means 11 reaches each of the radio wave transmission sections 20, so that each of the radio wave transmission sections 20 The transmission timing (phase) of the radio wave 2 is set to be different. For this reason, the high intensity | strength area | region of the radio wave 2 transmitted from the radio wave transmission unit 20 and propagating through the concrete structure 1 is concentrated and distributed, and the radio wave 2 is focused on the radio wave focusing positions A, B, C. it can. As a result, this second embodiment also has the same effects as the effects (1) and (2) of the first embodiment.

  As mentioned above, although some embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. Is included in the scope and gist of the invention, and is included in the invention described in the claims and the equivalents thereof.

1 Concrete structure (dielectric)
2 Radio wave 3 Embedded object 10 Embedded object exploration device 11 Signal generator 12 Radio wave transmission means 13 Radio wave reception means 16 Embedded object position calculation means 18 Phase input means 20 Radio wave transmission unit 30 Embedded object exploration device 31 Phase input means 32 Signal division unit 33 Signal delay means 34 wiring

Claims (6)

In the buried object exploration device for exploring the buried object existing in the dielectric by transmitting and receiving radio waves into the dielectric including concrete and soil,
Signal generating means for generating a high-frequency signal;
Radio wave transmission means comprising a plurality of radio wave transmission units for transmitting radio waves based on high frequency signals from the signal generation means and transmitting and transmitting the radio waves into the dielectric,
Radio wave receiving means for receiving a radio wave reflected by the buried object and making it a high frequency signal;
The position of the buried object in the dielectric is calculated from the signal level of the high-frequency signal from the radio wave receiving means and the propagation time of the radio wave from the transmission by the radio wave sending means to the reception by the radio wave receiving means. Embedded object position calculating means
Each of the radio wave transmitters is configured by phase input means so that the timing of transmitting radio waves is different, and is configured to concentrate and distribute high intensity areas of radio waves propagating in the dielectric. A buried object exploration device.   The phase input means transmits radio waves in each of the radio wave transmitters so that regions having high intensity of radio waves propagating in the dielectric are concentrated and distributed toward arbitrary positions in the dielectric and have directivity. The buried object searching device according to claim 1, wherein the setting device is configured to set the timings differently. The phase input means includes a delay circuit that sets a delay time for the high-frequency signal from the signal generation means and inputs the high-frequency signal to a plurality of radio wave transmission units, or each of the signal generation unit and the radio wave transmission unit. The buried object exploration device according to claim 1, wherein the wiring is different in length to be connected. The buried object search device according to claim 3, wherein a delay setting time of the delay circuit or a length of the wiring is configured to be variable. The buried object exploration device according to any one of claims 1 to 4, wherein the dielectric includes at least one of concrete, soil, asphalt, sand, rubber, vinyl chloride resin, plastic, and ceramic. In the buried object exploration method for exploring the buried object existing in the dielectric by transmitting and receiving radio waves into the dielectric including concrete and soil,
When a plurality of radio wave transmission units of the radio wave transmission means transmit radio waves, the radio waves are transmitted and propagated in the dielectric, and the radio wave reception means receives the radio waves reflected from the embedded object to obtain high frequency signals. The position of the buried object in the dielectric is calculated from the signal level of the high-frequency signal from the radio wave receiving means and the propagation time of the radio wave from the transmission by the radio wave transmission means to the reception by the radio wave reception means. When detecting and investigating the buried object,
A buried object searching method, wherein the radio wave transmitting units are set to have different timings for transmitting radio waves, and regions of high intensity of radio waves propagating in the dielectric are concentrated and distributed.