JP2018072052A - Specific resistance measuring apparatus of soil - Google Patents
Specific resistance measuring apparatus of soil Download PDFInfo
- Publication number
- JP2018072052A JP2018072052A JP2016209124A JP2016209124A JP2018072052A JP 2018072052 A JP2018072052 A JP 2018072052A JP 2016209124 A JP2016209124 A JP 2016209124A JP 2016209124 A JP2016209124 A JP 2016209124A JP 2018072052 A JP2018072052 A JP 2018072052A
- Authority
- JP
- Japan
- Prior art keywords
- specific resistance
- electrode
- electrodes
- soil
- frame body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
Description
本発明は、土壌の比抵抗を測定する比抵抗測定装置に関する。 The present invention relates to a specific resistance measuring device that measures the specific resistance of soil.
地中に埋設された鉄等の金属製の管の腐食は、一般に、腐食電流回路が形成されることにより、腐食が促進されると考えられる。土壌の比抵抗値が大きく、電気を通し難い砂質系の土壌等の埋設環境下では、腐食電流回路が形成され難く、腐食の進行度は遅い。逆に、土壌の比抵抗値が小さく、電気を通し易い粘土質系の土壌等の埋設環境下では、腐食電流回路が形成され易く、腐食の進行度は早い。 Corrosion of a pipe made of metal such as iron buried in the ground is generally considered to be accelerated by forming a corrosion current circuit. In a buried environment such as sandy soil where the specific resistance value of the soil is large and it is difficult to conduct electricity, a corrosion current circuit is difficult to form, and the progress of corrosion is slow. On the other hand, in a buried environment such as clay-based soil where the specific resistance value of the soil is small and electricity is easily conducted, a corrosion current circuit is easily formed, and the progress of corrosion is fast.
このように、土壌の比抵抗値と腐食性とは密接に関係しており、比抵抗値は土壌の腐食性を評価する上で有効な指標となっており、例えば、下記表１に示すように、ＡＮＳＩやＤＧＶＷにおいて、土壌の腐食性の評価の項目に、土壌の比抵抗値が取り入れられている。 Thus, the specific resistance value and the corrosivity of the soil are closely related, and the specific resistance value is an effective index for evaluating the corrosiveness of the soil. For example, as shown in Table 1 below In addition, in ANSI and DGVW, the specific resistance value of the soil is taken into the item of the evaluation of the corrosiveness of the soil.
従来、土壌の比抵抗測定装置としては、例えば土壌棒方式の比抵抗測定装置が知られている。この比抵抗測定装置は、図１４に示すように、土壌１０１中に挿入される電極棒１０２と、アナログ式の抵抗計１０３とを有している。電極棒１０２は、鋼材でできた先端部１０４と、絶縁リング１０５を介したステンレス製の本体部１０６とを有しており、先端部１０４と本体部１０６との間の抵抗値を測定するように構成されている。 2. Description of the Related Art Conventionally, as a soil resistivity measuring device, for example, a soil rod type resistivity measuring device is known. As shown in FIG. 14, this specific resistance measuring apparatus has an electrode rod 102 inserted into the soil 101 and an analog resistance meter 103. The electrode rod 102 has a tip 104 made of steel and a stainless steel main body 106 with an insulating ring 105 interposed therebetween, so that the resistance value between the tip 104 and the main body 106 is measured. It is configured.
これによると、電極棒１０２を土壌１０１中に挿入するだけで、土壌１０１の比抵抗値を測定することができるので、簡易である。尚、上記のような土壌棒方式の比抵抗測定装置は例えば下記特許文献１および特許文献２に記載されている。 According to this, it is simple because the specific resistance value of the soil 101 can be measured simply by inserting the electrode rod 102 into the soil 101. Note that the soil rod type specific resistance measuring apparatus as described above is described in, for example, Patent Document 1 and Patent Document 2 below.
また、上記のような土壌棒方式以外の比抵抗測定装置としては、土壌箱方式の比抵抗測定装置が知られている。この比抵抗測定装置は、採取された土壌を土壌箱に隙間無く詰め込み、土壌箱の両端部に設けられた電極で比抵抗値を測定するものである。 Moreover, as a specific resistance measuring device other than the soil rod method as described above, a soil box type specific resistance measuring device is known. This specific resistance measuring device packs the collected soil into a soil box without gaps, and measures the specific resistance value with electrodes provided at both ends of the soil box.
これによると、採取した土壌のなかから任意に土壌を選択することができ、採取した土壌中の比抵抗値が最小の土壌を測定することができる。尚、上記のような土壌箱方式の比抵抗測定装置は例えば下記特許文献３に記載されている。 According to this, soil can be selected arbitrarily from the collected soil, and the soil having the smallest specific resistance value in the collected soil can be measured. In addition, the above soil box type specific resistance measuring apparatus is described in Patent Document 3 below, for example.
しかしながら上記の土壌棒方式の比抵抗測定装置では、電極棒１０２を土壌１０１中に挿入した際、電極棒１０２の先端部１０４が当接している範囲しか測定できず、先端部１０４の箇所以外に比抵抗値が異なる土質が存在している場合に、十分に対応できないといった問題がある。 However, in the above-described soil rod type specific resistance measuring apparatus, when the electrode rod 102 is inserted into the soil 101, only the area where the tip 104 of the electrode rod 102 is in contact can be measured. There is a problem that it is not possible to sufficiently cope with soils having different specific resistance values.
さらに、土壌１０１の比抵抗を正確に測定するには、電極棒１０２と土壌１０１とが密着していなければならず、電極棒１０２と土壌１０１との間に空隙があると、安定した測定結果が得られないといった問題がある。 Furthermore, in order to accurately measure the specific resistance of the soil 101, the electrode rod 102 and the soil 101 must be in close contact with each other. If there is a gap between the electrode rod 102 and the soil 101, a stable measurement result is obtained. There is a problem that cannot be obtained.
また、土壌箱方式の比抵抗測定装置では、一旦、土壌を採取した後、採取した土壌を土壌箱に詰め込んで測定するため、手間と時間を要するといった問題がある。 In addition, the soil box type specific resistance measuring apparatus has a problem that it takes time and labor since the soil is once sampled and then packed and measured in the soil box.
本発明は、正確および迅速且つ簡易に土壌の比抵抗を測定することが可能な比抵抗測定装置を提供することを目的とする。 An object of this invention is to provide the specific resistance measuring apparatus which can measure the specific resistance of soil correctly, quickly and easily.
上記目的を達成するために、本第１発明は、土壌の比抵抗を測定するために用いる比抵抗測定装置であって、
土壌中に挿入可能な測定フレーム体を有し、
測定フレーム体に第１電極と第２電極とが設けられ、
第１電極と第２電極とは、測定フレーム体の挿入方向を横切る方向において、間隔をあけて対向しており、
対向する一対の第１電極と第２電極との間の電流と電位差とに基づいて比抵抗値を測定可能であるものである。
In order to achieve the above object, the first invention is a specific resistance measuring apparatus used for measuring the specific resistance of soil,
It has a measuring frame that can be inserted into the soil,
The measurement frame body is provided with a first electrode and a second electrode;
The first electrode and the second electrode are opposed to each other with a gap in the direction crossing the insertion direction of the measurement frame body,
The specific resistance value can be measured based on the current and potential difference between the pair of first and second electrodes facing each other.
これによると、比抵抗値を測定する際、測定フレーム体を土壌中に挿入する（突き刺す）ことにより、対向する第１電極と第２電極との間に土壌が挟まれるため、土圧により電極と土壌との密着状態が良好になり、正確および迅速且つ簡易に、土壌の比抵抗を測定することができる。 According to this, when the specific resistance value is measured, the soil is sandwiched between the opposing first electrode and the second electrode by inserting (piercing) the measurement frame body into the soil. As a result, the specific resistance of the soil can be measured accurately, quickly and easily.
本第２発明における比抵抗測定装置は、複数の第１電極と複数の第２電極とがそれぞれ測定フレーム体の挿入方向において縦列に並べられ、
これら第１電極と第２電極とが、測定フレーム体の挿入方向を横切る方向において、間隔をあけて対向しており、
測定フレーム体の挿入方向における一対の第１電極間の電流と電位差とに基づく第１の比抵抗値と、測定フレーム体の挿入方向における一対の第２電極間の電流と電位差とに基づく第２の比抵抗値と、対向する一対の第１電極と第２電極との間の電流と電位差とに基づく第３の比抵抗値とを測定可能に構成されているものである。
In the specific resistance measuring apparatus according to the second aspect of the invention, the plurality of first electrodes and the plurality of second electrodes are each arranged in a column in the insertion direction of the measurement frame body,
The first electrode and the second electrode are opposed to each other with an interval in a direction crossing the insertion direction of the measurement frame body,
A first specific resistance value based on the current and potential difference between the pair of first electrodes in the insertion direction of the measurement frame body, and a second value based on the current and potential difference between the pair of second electrodes in the insertion direction of the measurement frame body. And a third specific resistance value based on the current and potential difference between the pair of first and second electrodes facing each other can be measured.
これによると、測定フレーム体に、複数の第１電極と複数の第２電極とがそれぞれ測定フレーム体の挿入方向において縦列に並べられ、これら第１電極と第２電極とが上記挿入方向を横切る方向において間隔をあけて対向しているため、広い範囲で、土壌の比抵抗を測定することができる。これにより、比抵抗値が異なる土質が存在している場合でも、十分に対応することができる。 According to this, a plurality of first electrodes and a plurality of second electrodes are arranged in a column in the insertion direction of the measurement frame body on the measurement frame body, and the first electrode and the second electrode cross the insertion direction. Since they face each other at intervals in the direction, the specific resistance of the soil can be measured in a wide range. Thereby, even when soils having different specific resistance values exist, it is possible to sufficiently cope with the soil.
また、複数の第１および第２電極を用いて、土壌の複数個所における比抵抗値を測定することができるため、信頼性の高い測定結果を得ることができる。 Moreover, since the specific resistance value in several places of soil can be measured using several 1st and 2nd electrodes, a highly reliable measurement result can be obtained.
本第３発明における比抵抗測定装置は、第１〜第３の比抵抗値のうちの最小の比抵抗値を選択可能に構成されているものである。 The specific resistance measuring apparatus according to the third aspect of the invention is configured to be able to select the minimum specific resistance value among the first to third specific resistance values.
これによると、土壌の比抵抗値が小さいほど、埋設された管の腐食が促進されるため、最小の比抵抗値を選択することによって、土壌の腐食性をより厳しい基準で評価することができる。 According to this, the smaller the specific resistance value of the soil, the more the corrosion of the buried pipe is promoted. Therefore, by selecting the minimum specific resistance value, the corrosiveness of the soil can be evaluated on a stricter basis. .
本第４発明における比抵抗測定装置は、測定フレーム体の挿入方向において隣同士である一対の第１電極間の電流と電位差と間隔をそれぞれＩ１、Ｖ１、Ｄ１とし、
測定フレーム体の挿入方向において隣同士である一対の第２電極間の電流と電位差と間隔をそれぞれＩ２、Ｖ２、Ｄ２とし、
対向する第１電極と第２電極との間の電流と電位差と間隔をそれぞれＩ３、Ｖ３、Ｄ３とすると、
第１の比抵抗値＝２×π×Ｄ１×（Ｖ１／Ｉ１）
第２の比抵抗値＝２×π×Ｄ２×（Ｖ２／Ｉ２）
第３の比抵抗値＝４×π×Ｄ３×（Ｖ３／Ｉ３）
という換算式に基づいて比抵抗値を求めることが可能であるものである。
In the specific resistance measurement apparatus according to the fourth aspect of the present invention, the current, the potential difference, and the distance between the pair of first electrodes adjacent to each other in the insertion direction of the measurement frame body are I 1 , V 1 , D 1
I 2 , V 2 , and D 2 respectively represent the current, potential difference, and spacing between a pair of second electrodes that are adjacent to each other in the insertion direction of the measurement frame body.
Assuming that the current, potential difference, and interval between the opposing first electrode and second electrode are I 3 , V 3 , and D 3 , respectively,
First specific resistance value = 2 × π × D 1 × (V 1 / I 1 )
Second specific resistance value = 2 × π × D 2 × (V 2 / I 2 )
Third specific resistance value = 4 × π × D 3 × (V 3 / I 3 )
It is possible to obtain the specific resistance value based on the conversion formula.
これによると、上記換算式に基づいて第１〜第３の比抵抗値を求めることにより、比抵抗値を正確に測定することができる。 According to this, the specific resistance value can be accurately measured by obtaining the first to third specific resistance values based on the above conversion formula.
本第５発明における比抵抗測定装置は、対向する第１電極と第２電極との間に挟まれている土壌を湿潤状態にする水分供給部材が測定フレーム体に設けられているものである。 In the specific resistance measuring apparatus according to the fifth aspect of the present invention, a water supply member that wets the soil sandwiched between the first electrode and the second electrode facing each other is provided in the measurement frame body.
これによると、測定フレーム体を土壌中に挿入し、水分を水分供給部材から土壌に供給することによって、対向する第１電極と第２電極との間に挟まれている土壌を湿潤状態にすることができる。これにより、湿潤状態の土壌の比抵抗値を測定することができる。 According to this, by inserting the measurement frame body into the soil and supplying moisture from the moisture supply member to the soil, the soil sandwiched between the first electrode and the second electrode facing each other is brought into a wet state. be able to. Thereby, the specific resistance value of wet soil can be measured.
本第６発明における比抵抗測定装置は、測定フレーム体は一対の対向するフレームを有し、
複数の第１電極は、一方のフレームに、測定フレーム体の挿入方向において縦列に並べられて設けられ、
複数の第２電極は、他方のフレームに、測定フレーム体の挿入方向において縦列に並べられて設けられているものである。
In the specific resistance measuring apparatus according to the sixth aspect of the invention, the measurement frame body has a pair of opposed frames,
The plurality of first electrodes are provided in one frame, arranged in a column in the insertion direction of the measurement frame body,
The plurality of second electrodes are arranged on the other frame in a column in the insertion direction of the measurement frame body.
これによると、複数の第１電極が、一方のフレームに、挿入方向に縦列に並べられ、複数の第２電極が、他方のフレームに、挿入方向に縦列に並べられ、これら第１電極と第２電極とが間隔をあけて対向しているため、広い範囲で、土壌の比抵抗を測定することができる。 According to this, a plurality of first electrodes are arranged in a column in the insertion direction in one frame, and a plurality of second electrodes are arranged in a column in the insertion direction in the other frame. Since the two electrodes face each other with a gap, the specific resistance of the soil can be measured in a wide range.
また、比抵抗値を測定する際、一対のフレームを土壌中に挿入する（突き刺す）ことにより、一対のフレーム間に土壌が挟まれるため、土圧により電極と土壌との密着状態が良好になり、正確および迅速且つ簡易に、土壌の比抵抗を測定することができる。 Moreover, when measuring the specific resistance value, the soil is sandwiched between the pair of frames by inserting (piercing) the pair of frames into the soil, so that the contact state between the electrode and the soil is improved by the earth pressure. The specific resistance of soil can be measured accurately, quickly and simply.
本第７発明における比抵抗測定装置は、測定フレーム体が比抵抗測定器に備えられ、
比抵抗測定器が抵抗計に接続されているものである。
In the specific resistance measuring apparatus according to the seventh aspect of the invention, the measurement frame body is provided in the specific resistance measuring instrument,
A specific resistance measuring instrument is connected to the ohmmeter.
以上のように本発明によると、正確および迅速且つ簡易に土壌の比抵抗を測定することができ、また、広い範囲で土壌の比抵抗を測定することができる。 As described above, according to the present invention, the specific resistance of soil can be measured accurately, quickly and simply, and the specific resistance of soil can be measured in a wide range.
以下、本発明における実施の形態を、図面を参照して説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
（第１の実施の形態）
第１の実施の形態では、図１〜図４に示すように、１は土壌２の比抵抗を測定するために用いる比抵抗測定装置であり、比抵抗測定器４と、比抵抗測定器４に接続されたデジタル交流抵抗計５とを有している。
(First embodiment)
In the first embodiment, as shown in FIGS. 1 to 4, 1 is a specific resistance measuring device used for measuring the specific resistance of the soil 2, and includes a specific resistance measuring device 4 and a specific resistance measuring device 4. And a digital AC ohmmeter 5 connected to.
比抵抗測定器４は、土壌２中に挿入可能な測定フレーム体１０と、取っ手部１４とを有している。測定フレーム体１０は、略Ｕ字状の部材であり、一対の対向するフレーム１１，１２と、両フレーム１１，１２の基端部間に設けられた連結フレーム１３とを有している。取っ手部１４は連結フレーム１３に設けられ、両フレーム１１，１２の側面間には補強板１５が設けられている。 The specific resistance measuring device 4 has a measurement frame body 10 that can be inserted into the soil 2 and a handle portion 14. The measurement frame body 10 is a substantially U-shaped member, and includes a pair of opposed frames 11 and 12 and a connecting frame 13 provided between the base end portions of both the frames 11 and 12. The handle portion 14 is provided on the connecting frame 13, and a reinforcing plate 15 is provided between the side surfaces of both the frames 11 and 12.
フレーム１１，１２はそれぞれ、細長い平板状の部材であり、先端が尖っている。一方のフレーム１１には、金属製の複数の第１電極１７ａ〜１７ｅが測定フレーム体１０の挿入方向Ａに縦列に並べられて設けられている。また、他方のフレーム１２には、金属製の複数の第２電極１８ａ〜１８ｅが上記挿入方向Ａに縦列に並べられて設けられている。第１電極１７ａ〜１７ｅは挿入方向Ａにおいて所定間隔Ｄ１をあけて縦列に並べられ、同様に、第２電極１８ａ〜１８ｅは挿入方向Ａにおいて所定間隔Ｄ２をあけて縦列に並べられている。また、これら第１電極１７ａ〜１７ｅと第２電極１８ａ〜１８ｅとは、上記挿入方向Ａに直交する方向（挿入方向Ａを横切る方向の一例）において、所定間隔Ｄ３をあけて対向している。尚、各所定間隔Ｄ１〜Ｄ３の単位はメートルである。 Each of the frames 11 and 12 is an elongated flat plate member having a sharp tip. One frame 11 is provided with a plurality of metal first electrodes 17 a to 17 e arranged in a column in the insertion direction A of the measurement frame body 10. The other frame 12 is provided with a plurality of metal second electrodes 18a to 18e arranged in a column in the insertion direction A. The first electrode 17a~17e are arranged in tandem at a predetermined distance D 1 in the insertion direction A, and similarly, the second electrode 18a~18e are arranged in tandem at a predetermined distance D 2 in the insertion direction A . These first electrode 17a~17e and a second electrode 18 a to 18 e, in the direction (one example of a direction transverse to the insertion direction A) orthogonal to the insertion direction A, is opposed at a predetermined distance D 3 . The unit of the predetermined distance D 1 to D 3 are meters.
尚、第１および第２電極１７ａ〜１７ｅ，１８ａ〜１８ｅは一方および他方のフレーム１１，１２に形成された凹部１９に嵌め込まれている。また、各第１および第２電極１７ａ〜１７ｅ，１８ａ〜１８ｅと一方および他方のフレーム１１，１２とは絶縁部材２０を介して電気的に絶縁されている。第１および第２電極１７ａ〜１７ｅ，１８ａ〜１８ｅにはそれぞれ配線２１が接続されている。 The first and second electrodes 17a to 17e and 18a to 18e are fitted in a recess 19 formed in one and the other frames 11 and 12, respectively. The first and second electrodes 17a to 17e and 18a to 18e are electrically insulated from one and the other frames 11 and 12 through an insulating member 20. A wiring 21 is connected to each of the first and second electrodes 17a to 17e and 18a to 18e.
フレーム１１，１２と連結フレーム１３と取っ手部１４との内部には、配線２１を通す配線用通路２２が形成されている。複数本の配線２１は、結束されて比抵抗測定器４から引き出され、デジタル交流抵抗計５に接続されている。 Inside the frames 11, 12, the connecting frame 13, and the handle portion 14, a wiring passage 22 through which the wiring 21 is passed is formed. The plurality of wirings 21 are bundled and drawn from the specific resistance measuring instrument 4 and connected to the digital AC ohmmeter 5.
図１，図５に示すように、デジタル交流抵抗計５は、交流電源２６と、交流電源２６に接続される電極１７ａ〜１７ｅ，１８ａ〜１８ｅを順次切り換える切換部２７と、切り換えられた電極１７ａ〜１７ｅ，１８ａ〜１８ｅ間の電流および電位差を計測する電流・電位差計測部２８と、計測された電流および電位差に基づいて比抵抗値を算出する演算部３０と、１回の測定において算出された複数の比抵抗値を記憶する記憶部３３と、記憶された複数の比抵抗値のうちから最小の比抵抗値を選択する選択部３１と、選択された比抵抗値をデジタル表示する表示部３２とを有している。 As shown in FIGS. 1 and 5, the digital AC ohmmeter 5 includes an AC power source 26, a switching unit 27 for sequentially switching the electrodes 17a to 17e and 18a to 18e connected to the AC power source 26, and the switched electrode 17a. To 17e, 18a to 18e, a current / potential difference measurement unit 28 for measuring the current and potential difference, a calculation unit 30 for calculating a specific resistance value based on the measured current and potential difference, and a single measurement. A storage unit 33 that stores a plurality of specific resistance values, a selection unit 31 that selects the minimum specific resistance value from the plurality of stored specific resistance values, and a display unit 32 that digitally displays the selected specific resistance value. And have.
図３，図４，図６に示すように、両フレーム１１，１２には、両フレーム１１，１２間に挟まれている土壌２に水３４を供給して土壌２を湿潤状態にする細い水分供給管３５（水分供給部材の一例）が設けられている。水分供給管３５はそれぞれ各フレーム１１，１２の長手方向に沿って取り付けられている。水分供給管３５には複数の小さな注出孔３６が形成されており、水分供給管３５内の水３４が注出孔３６から外部に注出される。 As shown in FIGS. 3, 4, and 6, both frames 11, 12 are supplied with water 34 to the soil 2 sandwiched between the frames 11, 12 to make the soil 2 wet. A supply pipe 35 (an example of a moisture supply member) is provided. The moisture supply pipe 35 is attached along the longitudinal direction of each of the frames 11 and 12. A plurality of small extraction holes 36 are formed in the moisture supply pipe 35, and the water 34 in the moisture supply pipe 35 is poured out from the extraction hole 36.
図１に示すように、両水分供給管３５には給水装置３７が接続されている。給水装置３７は、可撓性を有する屈曲自在な給水用チューブ３８と、給水バルブ３９と、小型の給水ポンプ４０と、水３４を貯める容器４１とを有している。尚、両水分供給管３５は、基端部において一本の管に合流して、給水用チューブ３８に接続されている。 As shown in FIG. 1, a water supply device 37 is connected to both moisture supply pipes 35. The water supply device 37 has a flexible flexible water supply tube 38, a water supply valve 39, a small water supply pump 40, and a container 41 for storing water 34. The two water supply pipes 35 merge into one pipe at the base end and are connected to the water supply tube 38.
以下、上記比抵抗測定装置１を用いて土壌２の比抵抗を測定する方法を説明する。 Hereinafter, a method for measuring the specific resistance of the soil 2 using the specific resistance measuring apparatus 1 will be described.
図１に示すように、比抵抗測定器４の測定フレーム体１０を土壌２に挿入し（突き刺し）、デジタル交流抵抗計５を作動させる。これにより、交流電源２６に接続される電極１７ａ〜１７ｅ，１８ａ〜１８ｅが切換部２７によって順次切り換えられ、切り換える度に、電極１７ａ〜１７ｅ，１８ａ〜１８ｅ間の電流および電位差が電流・電位差計測部２８によって計測される。 As shown in FIG. 1, the measurement frame body 10 of the specific resistance measuring instrument 4 is inserted into the soil 2 (piercing), and the digital AC ohmmeter 5 is operated. As a result, the electrodes 17a to 17e and 18a to 18e connected to the AC power supply 26 are sequentially switched by the switching unit 27. Each time the electrodes 17a to 17e and 18a to 18e are switched, the current and the potential difference between the electrodes 17a to 17e and 18a to 18e change. 28 is measured.
例えば、先ず、図７（ａ）に示すように、切換部２７によって第１電極１７ａと第１電極１７ｂとが交流電源２６に接続され、電流・電位差計測部２８によって一対の第１電極１７ａ，１７ｂ間を流れる電流Ｉ１と一対の第１電極１７ａ，１７ｂ間の電位差Ｖ１とが計測され、これら電流Ｉ１と電位差Ｖ１とに基づいて、一対の第１電極１７ａ，１７ｂ間の第１の比抵抗値Ｒ１（１）が演算部３０により算出される。 For example, first, as shown in FIG. 7A, the first electrode 17a and the first electrode 17b are connected to the AC power supply 26 by the switching unit 27, and the pair of first electrodes 17a, A current I 1 flowing between the pair of first electrodes 17a and 17b and a potential difference V 1 between the pair of first electrodes 17a and 17b are measured, and based on the current I 1 and the potential difference V 1 , the first difference between the pair of first electrodes 17a and 17b is measured. A specific resistance value R 1 (1) of 1 is calculated by the calculation unit 30.
この際、演算部３０において、下記の第１換算式を用いて第１の比抵抗値Ｒ１（１）が算出される。
Ｒ１＝２×π×Ｄ１×（Ｖ１／Ｉ１）・・・第１換算式
尚、上記電流Ｉ１の単位はアンペア、電位差Ｖ１の単位はボルト、比抵抗値Ｒ１の単位はΩ・ｍである。尚、算出された第１の比抵抗値Ｒ１（１）は記憶部３３に記憶される。
At this time, the calculation unit 30 calculates the first specific resistance value R 1 (1) using the following first conversion formula.
R 1 = 2 × π × D 1 × (V 1 / I 1 )... First conversion formula The unit of the current I 1 is ampere, the unit of the potential difference V 1 is volt, and the unit of the specific resistance value R 1 Is Ω · m. The calculated first specific resistance value R 1 (1) is stored in the storage unit 33.
次に、図７（ｂ）に示すように、切換部２７によって第１電極１７ｂと第１電極１７ｃとが交流電源２６に接続され、電流・電位差計測部２８によって第１電極１７ｂ，１７ｃ間を流れる電流Ｉ１と第１電極１７ｂ，１７ｃ間の電位差Ｖ１とが計測され、これら電流Ｉ１と電位差Ｖ１とに基づいて、同様に、第１電極１７ｂ，１７ｃ間の第１の比抵抗値Ｒ１（２）が演算部３０において上記第１換算式により算出される。 Next, as shown in FIG. 7B, the first electrode 17 b and the first electrode 17 c are connected to the AC power source 26 by the switching unit 27, and the first electrode 17 b and 17 c are connected by the current / potential difference measuring unit 28. current I 1 and the first electrode 17b flows, and the potential difference V 1 of the inter-17c is measured, based on the these current I 1 and the voltage difference V 1, Similarly, the first electrode 17b, a first specific resistance between 17c The value R 1 (2) is calculated by the calculation unit 30 using the first conversion formula.
このようにして、上記と同様に、順次、図７（ｃ）に示すように、一対の第１電極１７ｃ，１７ｄ間における電流Ｉ１と電位差Ｖ１とが計測され、これら電流Ｉ１と電位差Ｖ１とに基づいて、第１電極１７ｃ，１７ｄ間の第１の比抵抗値Ｒ１（３）が上記第１換算式により算出され、その後、図７（ｄ）に示すように、一対の第１電極１７ｄ，１７ｅ間における電流Ｉ１と電位差Ｖ１とが計測され、これら電流Ｉ１と電位差Ｖ１とに基づいて、第１電極１７ｄ，１７ｅ間の第１の比抵抗値Ｒ１（４）が上記第１換算式により算出される。これにより、複数の第１の比抵抗値Ｒ１（１）〜第１の比抵抗値Ｒ１（４）が求められ、各第１の比抵抗値Ｒ１（１）〜第１の比抵抗値Ｒ１（４）は記憶部３３に記憶される。 In this way, in the same manner as described above, sequentially, as shown in FIG. 7 (c), the pair of first electrode 17c, and a current I 1 and the potential difference V 1 between 17d is measured, these currents I 1 and the potential difference Based on V 1 , a first specific resistance value R 1 (3) between the first electrodes 17c and 17d is calculated by the first conversion formula, and then, as shown in FIG. The current I 1 and the potential difference V 1 between the first electrodes 17d and 17e are measured, and based on the current I 1 and the potential difference V 1 , a first specific resistance value R 1 ( 4) is calculated by the first conversion formula. Accordingly, a plurality of first specific resistance values R 1 (1) to first specific resistance values R 1 (4) are obtained, and each of the first specific resistance values R 1 (1) to the first specific resistance values is obtained. The value R 1 (4) is stored in the storage unit 33.
次に、図８（ａ）に示すように、切換部２７によって第２電極１８ａと第２電極１８ｂとが交流電源２６に接続され、電流・電位差計測部２８によって一対の第２電極１８ａ，１８ｂ間を流れる電流Ｉ２と一対の第２電極１８ａ，１８ｂ間の電位差Ｖ２とが計測され、これら電流Ｉ２と電位差Ｖ２とに基づいて、第２電極１８ａ，１８ｂ間の第２の比抵抗値Ｒ２（１）が演算部３０により算出される。 Next, as shown in FIG. 8A, the switching unit 27 connects the second electrode 18a and the second electrode 18b to the AC power supply 26, and the current / potential difference measuring unit 28 sets a pair of second electrodes 18a and 18b. the second electrode 18a current I 2 and the pair flowing between, and the potential difference V 2 between 18b is measured, based on the these current I 2 and the potential V 2, the second electrode 18a, a second ratio between 18b The resistance value R 2 (1) is calculated by the calculation unit 30.
この際、演算部３０において、下記の第２換算式を用いて第２の比抵抗値Ｒ２（１）が算出される。
Ｒ２＝２×π×Ｄ２×（Ｖ２／Ｉ２）・・・第２換算式
尚、算出された第２の比抵抗値Ｒ２（１）は記憶部３３に記憶される。
At this time, the computing unit 30 calculates the second specific resistance value R 2 (1) using the following second conversion formula.
R 2 = 2 × π × D 2 × (V 2 / I 2 )... Second conversion formula The calculated second specific resistance value R 2 (1) is stored in the storage unit 33.
次に、図８（ｂ）に示すように、切換部２７によって第２電極１８ｂと第２電極１８ｃとが交流電源２６に接続され、電流・電位差計測部２８によって一対の第２電極１８ｂ，１８ｃ間を流れる電流Ｉ２と第２電極１８ｂ，１８ｃ間の電位差Ｖ２とが計測され、これら電流Ｉ２と電位差Ｖ２とに基づいて、同様に、第２電極１８ｂ，１８ｃ間の第２の比抵抗値Ｒ２（２）が演算部３０において上記第２換算式により算出される。 Next, as shown in FIG. 8B, the second electrode 18 b and the second electrode 18 c are connected to the AC power source 26 by the switching unit 27, and the pair of second electrodes 18 b and 18 c are connected by the current / potential difference measuring unit 28. The current I 2 flowing between them and the potential difference V 2 between the second electrodes 18b and 18c are measured. Similarly, based on the current I 2 and the potential difference V 2 , the second difference between the second electrodes 18b and 18c is measured. The specific resistance value R 2 (2) is calculated by the arithmetic unit 30 using the second conversion formula.
このようにして、上記と同様に、順次、図８（ｃ）に示すように、一対の第２電極１８ｃ，１８ｄ間における電流Ｉ２と電位差Ｖ２とが計測され、これら電流Ｉ２と電位差Ｖ２とに基づいて、第２電極１８ｃ，１８ｄ間の第２の比抵抗値Ｒ２（３）が上記第２換算式により算出され、その後、図８（ｄ）に示すように、一対の第２電極１８ｄ，１８ｅ間における電流Ｉ２と電位差Ｖ２とが計測され、これら電流Ｉ２と電位差Ｖ２とに基づいて、第２電極１８ｄ，１８ｅ間の第２の比抵抗値Ｒ２（４）が上記第２換算式により算出される。これにより、複数の第２の比抵抗値Ｒ２（１）〜第２の比抵抗値Ｒ２（４）が求められ、各第２の比抵抗値Ｒ２（１）〜第２の比抵抗値Ｒ２（４）は記憶部３３に記憶される。 In this manner, in the same manner as described above, as shown in FIG. 8C, the current I 2 and the potential difference V 2 between the pair of second electrodes 18c and 18d are sequentially measured, and the current I 2 and the potential difference are measured. Based on V 2 , the second specific resistance value R 2 (3) between the second electrodes 18c and 18d is calculated by the second conversion formula, and then, as shown in FIG. The current I 2 and the potential difference V 2 between the second electrodes 18d and 18e are measured, and based on the current I 2 and the potential difference V 2 , a second specific resistance value R 2 ( 4) is calculated by the second conversion formula. As a result, a plurality of second specific resistance values R 2 (1) to second specific resistance values R 2 (4) are obtained, and each of the second specific resistance values R 2 (1) to second specific resistance values is obtained. The value R 2 (4) is stored in the storage unit 33.
次に、図９（ａ）に示すように、切換部２７によって対向する一対の第１電極１７ａと第２電極１８ａとが交流電源２６に接続され、電流・電位差計測部２８によって、一対の第１電極１７ａと第２電極１８ａとの間を流れる電流Ｉ３と、第１電極１７ａと第２電極１８ａとの間の電位差Ｖ３とが計測され、これら電流Ｉ３と電位差Ｖ３とに基づいて、一対の第１電極１７ａと第２電極１８ａとの間の第３の比抵抗値Ｒ３（１）が演算部３０により算出される。 Next, as shown in FIG. 9A, the pair of first electrodes 17a and the second electrode 18a facing each other by the switching unit 27 is connected to the AC power source 26, and the current / potential difference measuring unit 28 sets the pair of first electrodes. A current I 3 flowing between the first electrode 17a and the second electrode 18a and a potential difference V 3 between the first electrode 17a and the second electrode 18a are measured, and based on the current I 3 and the potential difference V 3. Thus, the arithmetic unit 30 calculates the third specific resistance value R 3 (1) between the pair of first electrodes 17a and the second electrode 18a.
この際、演算部３０において、下記の第３換算式を用いて第３の比抵抗値Ｒ３（１）が算出される。
Ｒ３＝４×π×Ｄ３×（Ｖ３／Ｉ３）・・・第３換算式
尚、算出された第３の比抵抗値Ｒ３（１）は記憶部３３に記憶される。
At this time, the calculation unit 30 calculates the third specific resistance value R 3 (1) using the following third conversion formula.
R 3 = 4 × π × D 3 × (V 3 / I 3 )... Third conversion equation Note that the calculated third specific resistance value R 3 (1) is stored in the storage unit 33.
次に、図９（ｂ）に示すように、切換部２７によって一対の第１電極１７ｂと第２電極１８ｂとが交流電源２６に接続され、電流・電位差計測部２８によって、一対の第１電極１７ｂと第２電極１８ｂとの間を流れる電流Ｉ３と、第１電極１７ｂと第２電極１８ｂとの間の電位差Ｖ３とが計測され、これら電流Ｉ３と電位差Ｖ３とに基づいて、同様に、第１電極１７ｂと第２電極１８ｂとの間の第３の比抵抗値Ｒ３（２）が演算部３０において上記第３換算式により算出される。 Next, as shown in FIG. 9 (b), the pair of first electrodes 17 b and the second electrode 18 b are connected to the AC power source 26 by the switching unit 27, and the pair of first electrodes by the current / potential difference measuring unit 28. Current I 3 flowing between 17b and second electrode 18b and potential difference V 3 between first electrode 17b and second electrode 18b are measured, and based on these current I 3 and potential difference V 3 , Similarly, the third specific resistance value R 3 (2) between the first electrode 17b and the second electrode 18b is calculated by the arithmetic unit 30 by the third conversion formula.
このようにして、上記と同様に、順次、図９（ｃ）に示すように、一対の第１電極１７ｃと第２電極１８ｃとの間における電流Ｉ３と電位差Ｖ３とが計測され、これら電流Ｉ３と電位差Ｖ３とに基づいて、一対の第１電極１７ｃと第２電極１８ｃとの間の第３の比抵抗値Ｒ３（３）が上記第３換算式により算出され、次に、図９（ｄ）に示すように、一対の第１電極１７ｄと第２電極１８ｄとの間における電流Ｉ３と電位差Ｖ３とが計測され、これら電流Ｉ３と電位差Ｖ３とに基づいて、一対の第１電極１７ｄと第２電極１８ｄとの間の第３の比抵抗値Ｒ３（４）が上記第３換算式により算出され、その後、図９（ｅ）に示すように、一対の第１電極１７ｅと第２電極１８ｅとの間における電流Ｉ３と電位差Ｖ３とが計測され、これら電流Ｉ３と電位差Ｖ３とに基づいて、一対の第１電極１７ｅと第２電極１８ｅとの間の第３の比抵抗値Ｒ３（５）が上記第３換算式により算出される。これにより、複数の第３の比抵抗値Ｒ３（１）〜第３の比抵抗値Ｒ３（５）が求められ、各第３の比抵抗値Ｒ３（１）〜第３の比抵抗値Ｒ３（５）は記憶部３３に記憶される。 In this way, in the same manner as described above, the current I 3 and the potential difference V 3 between the pair of the first electrode 17c and the second electrode 18c are sequentially measured as shown in FIG. Based on the current I 3 and the potential difference V 3 , the third specific resistance value R 3 (3) between the pair of the first electrode 17c and the second electrode 18c is calculated by the third conversion formula, As shown in FIG. 9D, the current I 3 and the potential difference V 3 between the pair of first electrode 17d and second electrode 18d are measured, and based on these current I 3 and potential difference V 3 The third specific resistance value R 3 (4) between the pair of first electrodes 17d and the second electrode 18d is calculated by the third conversion formula, and then, as shown in FIG. first electrode 17e of the current I 3 and the potential difference V 3 between the second electrode 18e been measured, this Based on the Luo current I 3 and the potential difference V 3, the third resistivity R 3 between the pair of first electrode 17e and the second electrode 18e (5) is calculated by the third conversion formula. Thereby, a plurality of third specific resistance values R 3 (1) to third specific resistance values R 3 (5) are obtained, and each of the third specific resistance values R 3 (1) to third specific resistance values is obtained. The value R 3 (5) is stored in the storage unit 33.
上記のようにして、１回の測定において、複数の第１の比抵抗値Ｒ１（１）〜第１の比抵抗値Ｒ１（４）と、第２の比抵抗値Ｒ２（１）〜第２の比抵抗値Ｒ２（４）と、第３の比抵抗値Ｒ３（１）〜第３の比抵抗値Ｒ３（５）とが求められて記憶部３３に記憶される。このように本第１の実施の形態では、一例として、１回の測定において、合計１３個の比抵抗値Ｒ１（１）〜Ｒ１（４）、Ｒ２（１）〜Ｒ２（４）、Ｒ３（１）〜Ｒ３（５）が求められて記憶部３３に記憶される。 As described above, in one measurement, a plurality of first specific resistance values R 1 (1) to first specific resistance values R 1 (4) and second specific resistance values R 2 (1) The second specific resistance value R 2 (4) and the third specific resistance value R 3 (1) to the third specific resistance value R 3 (5) are obtained and stored in the storage unit 33. Thus, in the first embodiment, as an example, in one measurement, a total of 13 specific resistance values R 1 (1) to R 1 (4), R 2 (1) to R 2 (4 ), R 3 (1) to R 3 (5) are obtained and stored in the storage unit 33.
その後、選択部３１において、記憶部３３に記憶されている複数の第１〜第３の比抵抗値Ｒ１（１）〜Ｒ１（４）、Ｒ２（１）〜Ｒ２（４）、Ｒ３（１）〜Ｒ３（５）のうちから最小の比抵抗値が選択され、選択された比抵抗値が表示部３２に表示される。 Thereafter, in the selection unit 31, a plurality of first to third specific resistance values R 1 (1) to R 1 (4), R 2 (1) to R 2 (4) stored in the storage unit 33, The minimum specific resistance value is selected from R 3 (1) to R 3 (5), and the selected specific resistance value is displayed on the display unit 32.
このようにして土壌２の比抵抗値を測定した後、比抵抗測定器４の両フレーム１１，１２を土壌２から抜き取ればよい。 After measuring the specific resistance value of the soil 2 in this way, both the frames 11 and 12 of the specific resistance measuring device 4 may be extracted from the soil 2.
比抵抗測定装置１を用いて、以上のような方法で土壌２の比抵抗を測定することにより、複数の第１電極１７ａ〜１７ｅが、一方のフレーム１１に、挿入方向Ａにおいて縦列に並べられ、複数の第２電極１８ａ〜１８ｅが、他方のフレーム１２に、挿入方向Ａにおいて縦列に並べられ、これら第１電極１７ａ〜１７ｅと第２電極１８ａ〜１８ｅとが所定間隔Ｄ３をあけて対向しているため、広い範囲で、土壌２の比抵抗値を測定することができる。これにより、比抵抗値が異なる土質が存在している場合でも、十分に対応することができる。 By measuring the specific resistance of the soil 2 by the method as described above using the specific resistance measuring device 1, the plurality of first electrodes 17 a to 17 e are arranged in a row in the insertion direction A on one frame 11. , facing the plurality of second electrodes 18a~18e is the other of the frame 12, inserted in the direction a are arranged in tandem, these first electrodes 17a~17e and the second electrode 18a~18e is at a predetermined distance D 3 Therefore, the specific resistance value of the soil 2 can be measured in a wide range. Thereby, even when soils having different specific resistance values exist, it is possible to sufficiently cope with the soil.
また、図１に示すように、一対のフレーム１１，１２を土壌２中に挿入することにより、一対のフレーム１１，１２間に土壌２が挟まれるため、土圧により各第１および第２電極１７ａ〜１７ｅ，１８ａ〜１８ｅと土壌２との密着状態が良好になり、正確および迅速且つ簡易に、土壌２の比抵抗値を測定することができる。 Further, as shown in FIG. 1, since the soil 2 is sandwiched between the pair of frames 11 and 12 by inserting the pair of frames 11 and 12 into the soil 2, the first and second electrodes are caused by earth pressure. 17a-17e, 18a-18e, and the contact | adherence state of the soil 2 become favorable, and the specific resistance value of the soil 2 can be measured correctly, quickly and easily.
また、複数の第１および第２電極１７ａ〜１７ｅ，１８ａ〜１８ｅを用い、上記第１〜第３換算式に基づいて第１〜第３の比抵抗値を求めることにより、土壌２の複数個所における比抵抗値を測定することができるため、信頼性の高い測定結果を得ることができる。 Further, by using the plurality of first and second electrodes 17a to 17e and 18a to 18e and obtaining the first to third specific resistance values based on the first to third conversion equations, a plurality of locations of the soil 2 are obtained. Since the specific resistance value can be measured, a highly reliable measurement result can be obtained.
また、土壌２の比抵抗値が小さいほど、埋設された管の腐食が促進されるため、上記の方法で求められた複数の第１〜第３の比抵抗値Ｒ１（１）〜Ｒ１（４）、Ｒ２（１）〜Ｒ２（４）、Ｒ３（１）〜Ｒ３（５）のうちから最小の比抵抗値を選択することによって、土壌２の腐食性をより厳しい基準で評価することができる。 Further, as the specific resistance of the soil 2 is small, the corrosion of the buried pipe is promoted, the specific resistance value of the plurality of first to third obtained by the above method R 1 (1) ~R 1 (4), R 2 (1) to R 2 (4), R 3 (1) to R 3 By selecting the minimum specific resistance value from (5), the stricter criteria for the corrosiveness of the soil 2 Can be evaluated.
また、図１に示すように、比抵抗測定器４の測定フレーム体１０を土壌２に挿入した後、給水装置３７の給水バルブ３９を開き、給水ポンプ４０を作動して、容器４１内の水３４を給水用チューブ３８から両水分供給管３５内に送ることにより、図４，図６に示すように、水３４が、両水分供給管３５内から注出孔３６を通って、両フレーム１１，１２間の土壌２に供給される。 Further, as shown in FIG. 1, after inserting the measurement frame body 10 of the specific resistance measuring instrument 4 into the soil 2, the water supply valve 39 of the water supply device 37 is opened, the water supply pump 40 is operated, and the water in the container 41 is As shown in FIG. 4 and FIG. 6, the water 34 passes from both the water supply pipes 35 through the pouring holes 36 to the both frames 11. , 12 is supplied to the soil 2.
これにより、両フレーム１１，１２間の土壌２を湿潤状態にすることができ、湿潤状態の土壌２の比抵抗値を測定することもできる。 Thereby, the soil 2 between both the frames 11 and 12 can be made into a moist state, and the specific resistance value of the soil 2 in the moist state can also be measured.
尚、下記表２は、従来の土壌箱方式の比抵抗測定装置で測定された土壌の比抵抗値と、本第１の実施の形態の比抵抗測定装置１で測定された土壌２の最小の比抵抗値との相関を示したものである。表２によると、土壌箱方式の比抵抗測定装置で測定された比抵抗値と本第１の実施の形態の比抵抗測定装置１で測定された最小の比抵抗値との相関係数は０．９４４となり、高い相関を示している。また、このときの回帰直線の傾きは１．０７６であり、この傾きが１．０に近いほど、測定された両者の比抵抗値の対応関係が１対１で近似していることになる。従って、本第１の実施の形態の比抵抗測定装置１で測定した比抵抗値は、従来の土壌箱方式の比抵抗測定装置で測定された比抵抗値に対して、ほぼ１対１の対応関係で近似しており、比抵抗値を求める際に使用した上記第１〜第３換算式が正しいことが確認できた。 In addition, the following Table 2 shows the specific resistance value of the soil measured by the conventional soil box type specific resistance measuring device and the minimum value of the soil 2 measured by the specific resistance measuring device 1 of the first embodiment. The correlation with the specific resistance value is shown. According to Table 2, the correlation coefficient between the specific resistance value measured by the soil box type specific resistance measuring device and the minimum specific resistance value measured by the specific resistance measuring device 1 of the first embodiment is 0. .944, indicating a high correlation. Further, the slope of the regression line at this time is 1.076, and the closer the slope is to 1.0, the closer the corresponding relationship between the measured resistivity values is in a one-to-one relationship. Accordingly, the specific resistance value measured by the specific resistance measuring apparatus 1 of the first embodiment is almost one-to-one corresponding to the specific resistance value measured by the conventional soil box type specific resistance measuring apparatus. It was approximated by the relationship, and it was confirmed that the first to third conversion equations used when obtaining the specific resistance value were correct.
また、図１０に示すグラフは、上記回帰直線を示すグラフであり、同じ土壌をサンプルとして、本第１の実施の形態の比抵抗測定装置１で測定したときの最小の比抵抗値のデータをＸ軸に示し、従来の土壌箱方式の比抵抗測定装置で測定したときの比抵抗値のデータをＹ軸に示している。 Moreover, the graph shown in FIG. 10 is a graph which shows the said regression line, The data of the minimum specific resistance value when it measures with the specific resistance measuring apparatus 1 of this 1st Embodiment using the same soil as a sample are shown. Indicated on the X-axis, data of specific resistance values measured with a conventional soil box type specific resistance measuring device are shown on the Y-axis.
上記第１の実施の形態では、第１および第２電極１７ａ〜１７ｅ，１８ａ〜１８ｅを一方および他方のフレーム１１，１２の凹部１９に嵌め込んでいるため、両フレーム１１，１２を土壌２に挿入するときの抵抗が小さくなり、両フレーム１１，１２を土壌２に容易に突き刺すことができる。 In the first embodiment, since the first and second electrodes 17a to 17e and 18a to 18e are fitted in the recesses 19 of the one and the other frames 11, 12, both the frames 11, 12 are placed on the soil 2. The resistance at the time of insertion becomes small, and both frames 11 and 12 can be easily stabbed into the soil 2.
上記第１の実施の形態では、図７に示すように、挿入方向Ａにおいて隣同士の第１電極１７ａ，１７ｂ間における電流Ｉ１と電位差Ｖ１とを計測し、これに基づいて第１の比抵抗値Ｒ１（１）を求めているが、これに限定されるものではなく、例えば、第１電極１７ｂをとばして、第１電極１７ａ，１７ｃ間における電流Ｉ１と電位差Ｖ１とを計測し、これに基づいて第１の比抵抗値Ｒ１を求めてもよい。 In the first embodiment, as shown in FIG. 7, the current I 1 and the potential difference V 1 between the adjacent first electrodes 17a and 17b in the insertion direction A are measured, and the first The specific resistance value R 1 (1) is obtained, but is not limited to this. For example, the first electrode 17b is skipped, and the current I 1 and the potential difference V 1 between the first electrodes 17a and 17c are calculated. Measurement may be made and the first specific resistance value R 1 may be obtained based on this measurement.
同様に、図８に示すように、挿入方向Ａにおいて隣同士の第２電極１８ａ，１８ｂ間における電流Ｉ２と電位差Ｖ２とを計測し、これに基づいて第２の比抵抗値Ｒ２（１）を求めているが、これに限定されるものではなく、例えば、第２電極１８ｂをとばして、第２電極１８ａ，１８ｃ間における電流Ｉ２と電位差Ｖ２とを計測し、これに基づいて第２の比抵抗値Ｒ２を求めてもよい。 Similarly, as shown in FIG. 8, the current I 2 and the potential difference V 2 between the adjacent second electrodes 18a and 18b in the insertion direction A are measured, and the second specific resistance value R 2 ( While seeking 1), is not limited thereto, for example, by skipping the second electrode 18b, the second electrode 18a, and a current I 2 and the potential difference V 2 between 18c measures, based on this the second may determine the specific resistance value R 2 Te.
また、図９に示すように、挿入方向Ａに直交する方向において対向する一対の第１電極１７ａと第２電極１８ａとの間における電流Ｉ３と電位差Ｖ３とを計測し、これに基づいて第３の比抵抗値Ｒ３（１）を求めているが、これに限定されるものではなく、例えば、斜め方向において対向する一対の第１電極１７ａと第２電極１８ｂとの間における電流Ｉ３と電位差Ｖ３とを計測し、これに基づいて第３の比抵抗値Ｒ３を求めてもよい。 Further, as shown in FIG. 9, the current I 3 and the potential difference V 3 between the pair of the first electrode 17a and the second electrode 18a facing each other in the direction orthogonal to the insertion direction A are measured, and based on this The third specific resistance value R 3 (1) is obtained. However, the present invention is not limited to this. For example, the current I between the pair of first electrode 17a and second electrode 18b opposed in the oblique direction is obtained. 3 and the potential difference V 3 may be measured, and based on this, the third specific resistance value R 3 may be obtained.
上記第１の実施の形態では、図４に示すように、水分供給管３５を、両方のフレーム１１，１２に設けているが、いずれか片方のフレームのみに設けてもよい。 In the first embodiment, as shown in FIG. 4, the moisture supply pipe 35 is provided in both the frames 11, 12, but may be provided only in one of the frames.
上記第１の実施の形態では、複数の比抵抗値Ｒ１（１）〜Ｒ１（４）、Ｒ２（１）〜Ｒ２（４）、Ｒ３（１）〜Ｒ３（５）のうちから最小の比抵抗値を選択して表示部３２に表示しているが、最小の比抵抗値に限定するものではなく、例えば、複数の比抵抗値Ｒ１（１）〜Ｒ１（４）、Ｒ２（１）〜Ｒ２（４）、Ｒ３（１）〜Ｒ３（５）の平均値を表示したり、或いは、最小の比抵抗値と最大の比抵抗値との間のいずれかの比抵抗値を表示してもよい。また、全ての複数の比抵抗値を表示してもよい。 In the first embodiment, a plurality of specific resistance values R 1 (1) to R 1 (4), R 2 (1) to R 2 (4), and R 3 (1) to R 3 (5) Although the minimum specific resistance value is selected and displayed on the display unit 32, the specific resistance value is not limited to the minimum specific resistance value. For example, a plurality of specific resistance values R 1 (1) to R 1 (4 ), R 2 (1) to R 2 (4), R 3 (1) to R 3 (5) average values, or between the minimum specific resistance value and the maximum specific resistance value Any specific resistance value may be displayed. Moreover, you may display all the several specific resistance values.
上記第１の実施の形態において、図３に示すように、各所定間隔Ｄ１，Ｄ２，Ｄ３は、全て同じ数値であってもよいし、或いは、異なる数値であってもよい。また、第１電極１７ａ〜１７ｅを５個、第２電極１８ａ〜１８ｅを５個設けているが、５個以外の複数個設けてもよい。 In the first embodiment, as shown in FIG. 3, all of the predetermined intervals D 1 , D 2 , D 3 may be the same numerical value or different numerical values. Further, five first electrodes 17a to 17e and five second electrodes 18a to 18e are provided, but a plurality other than five may be provided.
また、図７〜図９に示すように、合計１３個の比抵抗値Ｒ１（１）〜Ｒ１（４）、Ｒ２（１）〜Ｒ２（４）、Ｒ３（１）〜Ｒ３（５）を求めているが、１３個以外の複数個の比抵抗値を求めてもよい。 Further, as shown in FIGS. 7-9, a total of 13 pieces of specific resistance R 1 (1) ~R 1 ( 4), R 2 (1) ~R 2 (4), R 3 (1) ~R 3 (5) is obtained, but a plurality of specific resistance values other than 13 may be obtained.
或いは、相対向する第１電極１７ａ〜１７ｅと第２電極１８ａ〜１８ｅとのうちのいずれか一組だけを設けたものであってもよい。この場合は、広い範囲の測定は望めないが、測定フレーム体１０を土壌２中に挿入する（突き刺す）ことにより、対向する一組の第１電極と第２電極との間に土壌２が挟まれるため、土圧により電極と土壌２との密着状態が良好になり、正確および迅速且つ簡易に土壌２の比抵抗を測定することができるといった効果を得ることができる。 Alternatively, only one set of the first electrodes 17a to 17e and the second electrodes 18a to 18e facing each other may be provided. In this case, although a wide range of measurement cannot be expected, the soil 2 is sandwiched between a pair of opposing first and second electrodes by inserting (piercing) the measurement frame body 10 into the soil 2. Therefore, the contact state between the electrode and the soil 2 is improved by the earth pressure, and the effect that the specific resistance of the soil 2 can be measured accurately, quickly and easily can be obtained.
上記第１の実施の形態において、フレーム１１，１２はそれぞれ、細長い平板状の部材であるが、平板状に限られるものではなく、他の形状の部材、例えば棒状の部材であってもよい。 In the first embodiment, each of the frames 11 and 12 is an elongated flat plate-like member, but is not limited to a flat plate shape, and may be a member having another shape, for example, a rod-like member.
（第２の実施の形態）
先述した第１の実施の形態では、図１に示すように、測定フレーム体１０を略Ｕ字状に形成しているが、この形状に限定されるものではなく、例えば、第２の実施の形態として、図１１〜図１３に示すように、測定フレーム体６１を六角形の筒状に形成してもよい。
(Second Embodiment)
In the first embodiment described above, the measurement frame body 10 is formed in a substantially U shape as shown in FIG. 1, but is not limited to this shape. For example, the measurement frame body 10 is not limited to the second embodiment. As a form, as shown in FIGS. 11 to 13, the measurement frame body 61 may be formed in a hexagonal cylindrical shape.
測定フレーム体６１の各内面には、複数の第１電極６２ａ〜６２ｃ，６４ａ〜６４ｃ，６６ａ〜６６ｃと複数の第２電極６３ａ〜６３ｃ，６５ａ〜６５ｃ，６７ａ〜６７ｃとがそれぞれ挿入方向Ａにおいて縦列に並べられて設けられている。 A plurality of first electrodes 62a to 62c, 64a to 64c, 66a to 66c and a plurality of second electrodes 63a to 63c, 65a to 65c, 67a to 67c are respectively provided in the insertion direction A on each inner surface of the measurement frame body 61. They are arranged in columns.
このうち、第１電極６２ａ〜６２ｃと第２電極６３ａ〜６３ｃとは、上記挿入方向Ａに直交する方向（挿入方向Ａを横切る方向の一例）において、所定間隔Ｄ３をあけて対向している。同様に、別の第１電極６４ａ〜６４ｃと別の第２電極６５ａ〜６５ｃとは、上記挿入方向Ａに直交する方向において、所定間隔Ｄ３をあけて対向している。さらに、他の第１電極６６ａ〜６６ｃと他の第２電極６７ａ〜６７ｃとは、上記挿入方向Ａに直交する方向において、所定間隔Ｄ３をあけて対向している。 Among them, the first electrode 62a~62c and the second electrode 63 a to 63 c, in the direction (one example of a direction transverse to the insertion direction A) orthogonal to the insertion direction A, is opposed at a predetermined distance D 3 . Similarly, another first electrode 64a~64c with another second electrode 65 a to 65 c, in the direction orthogonal to the insertion direction A, is opposed at a predetermined distance D 3. Furthermore, the other first electrode 66a~66c and another second electrode 67a to 67c, in the direction orthogonal to the insertion direction A, is opposed at a predetermined distance D 3.
尚、その他の構成については、先述した第１の実施の形態のものと同じであるため、詳細な説明は省略する。 Since other configurations are the same as those of the first embodiment described above, detailed description thereof is omitted.
比抵抗測定装置１を用いて土壌２の比抵抗を測定する場合、比抵抗測定器４の測定フレーム体６１を土壌２に挿入し（突き刺し）、デジタル交流抵抗計５を作動させて、先述した第１の実施の形態と同様な測定方法を行えばよい。 When measuring the specific resistance of the soil 2 using the specific resistance measuring device 1, the measurement frame body 61 of the specific resistance measuring device 4 is inserted (stabbed) into the soil 2, and the digital AC ohmmeter 5 is operated, as described above. A measurement method similar to that of the first embodiment may be performed.
この際、計測された一対の第１電極６２ａ〜６２ｃ間の電流Ｉ１と電位差Ｖ１とに基づいて第１の比抵抗値Ｒ１を求め、一対の第２電極６３ａ〜６３ｃ間の電流Ｉ２と電位差Ｖ２とに基づいて第２の比抵抗値Ｒ２を求め、対向する一対の第１電極６２ａ〜６２ｃと第２電極６３ａ〜６３ｃとの間の電流Ｉ３と電位差Ｖ３とに基づいて第３の比抵抗値Ｒ３を求めることができる。 In this case, first determine the specific resistance value R 1 on the basis of the current I 1 and the potential V 1 of the inter-measured pair of first electrodes 62 a - 62 c, the current I between the pair of second electrode 63a~63c 2 and the potential difference V 2 , the second specific resistance value R 2 is obtained, and the current I 3 and the potential difference V 3 between the pair of first electrodes 62 a to 62 c and the second electrodes 63 a to 63 c facing each other are obtained. Based on this, the third specific resistance value R 3 can be obtained.
また、同様に、計測された別の一対の第１電極６４ａ〜６４ｃ間の電流Ｉ１と電位差Ｖ１とに基づいて第１の比抵抗値Ｒ１を求め、別の一対の第２電極６５ａ〜６５ｃ間の電流Ｉ２と電位差Ｖ２とに基づいて第２の比抵抗値Ｒ２を求め、対向する別の一対の第１電極６４ａ〜６４ｃと第２電極６５ａ〜６５ｃとの間の電流Ｉ３と電位差Ｖ３とに基づいて第３の比抵抗値Ｒ３を求めることもできる。 Similarly, the first specific resistance value R 1 is obtained based on the measured current I 1 between the other pair of first electrodes 64 a to 64 c and the potential difference V 1, and another pair of second electrodes 65 a. second determine the specific resistance value R 2 based on the current I 2 and the potential difference V 2 between ～65C, first electrode 64a~64c another pair facing the current between the second electrode 65a~65c The third specific resistance value R 3 can also be obtained based on I 3 and the potential difference V 3 .
さらに、同様に、計測された他の一対の第１電極６６ａ〜６６ｃ間の電流Ｉ１と電位差Ｖ１とに基づいて第１の比抵抗値Ｒ１を求め、他の一対の第２電極６７ａ〜６７ｃ間の電流Ｉ２と電位差Ｖ２とに基づいて第２の比抵抗値Ｒ２を求め、対向する他の一対の第１電極６６ａ〜６６ｃと第２電極６７ａ〜６７ｃとの間の電流Ｉ３と電位差Ｖ３とに基づいて第３の比抵抗値Ｒ３を求めることもできる。 Further, similarly, the first specific resistance value R 1 is obtained based on the measured current I 1 between the other pair of first electrodes 66 a to 66 c and the potential difference V 1, and the other pair of second electrodes 67 a. second determine the specific resistance value R 2 based on the current I 2 and the potential difference V 2 between ～67C, first electrode 66a~66c other pair opposite the current between the second electrode 67a~67c The third specific resistance value R 3 can also be obtained based on I 3 and the potential difference V 3 .
上記第２の実施の形態では、測定フレーム体６１を六角形の筒状に形成しているが、六角形に限定されるものではなく、例えば四角形等の多角形に形成してもよいし、或いは、円筒形に形成してもよい。 In the second embodiment, the measurement frame body 61 is formed in a hexagonal cylindrical shape, but is not limited to a hexagonal shape, and may be formed in a polygon such as a quadrangle, Alternatively, it may be formed in a cylindrical shape.
また、第１および第２電極６２ａ〜６２ｃ，６４ａ〜６４ｃ，６６ａ〜６６ｃ，６３ａ〜６３ｃ，６５ａ〜６５ｃ，６７ａ〜６７ｃを、挿入方向Ａにおいて、それぞれ３個ずつ設けているが、３個以外の複数個ずつ設けてもよい。 In addition, three first and second electrodes 62a to 62c, 64a to 64c, 66a to 66c, 63a to 63c, 65a to 65c, and 67a to 67c are provided in the insertion direction A. A plurality of each may be provided.
或いは、第１および第２電極６２ａ〜６２ｃ，６４ａ〜６４ｃ，６６ａ〜６６ｃ，６３ａ〜６３ｃ，６５ａ〜６５ｃ，６７ａ〜６７ｃを、挿入方向Ａにおいて、それぞれ１個ずつ設けたものであってもよい。この場合は、広い範囲の測定は望めないが、測定フレーム体６１を土壌２中に挿入する（突き刺す）ことにより、挿入方向Ａに直交する方向において対向する一組の第１電極と第２電極との間に土壌２が挟まれるため、土圧により電極と土壌２との密着状態が良好になり、正確および迅速且つ簡易に土壌２の比抵抗を測定することができるといった効果を得ることができる。 Alternatively, the first and second electrodes 62a to 62c, 64a to 64c, 66a to 66c, 63a to 63c, 65a to 65c, and 67a to 67c may be provided one by one in the insertion direction A. . In this case, measurement in a wide range cannot be expected, but a pair of first electrode and second electrode facing each other in the direction orthogonal to the insertion direction A by inserting (piercing) the measurement frame body 61 into the soil 2. Since the soil 2 is sandwiched between the two, the contact state between the electrode and the soil 2 is improved by the earth pressure, and the specific resistance of the soil 2 can be measured accurately, quickly and easily. it can.
上記第１の実施の形態においては、図１に示すように、測定フレーム体１０を土壌２に挿入する際、作業者が取っ手部１４を手で握って、測定フレーム体１０を土壌２に突き刺すのであるが、土壌２が固く、測定フレーム体１０の土壌２への挿入時の抵抗が大きい場合には、例えば、作業者の脚力等を利用して、スコップやシャベルのように測定フレーム体１０を土壌２に押し込んだり、作業者の体重を利用して押し込んでもよい。また、測定フレーム体１０を土壌２に容易に挿入するために、測定フレーム体１０に治具（アタッチメント）を装着してもよい。さらに、上記第２の実施の形態において、図１３に示すように、測定フレーム体６１を土壌２に挿入する際も同様である。 In the first embodiment, as shown in FIG. 1, when inserting the measurement frame body 10 into the soil 2, the operator holds the handle portion 14 with his hand and pierces the measurement frame body 10 into the soil 2. However, when the soil 2 is hard and the resistance when the measurement frame body 10 is inserted into the soil 2 is large, the measurement frame body 10 such as a scoop or a shovel is used by using the leg strength of the operator, for example. May be pushed into the soil 2 or may be pushed in using the weight of the operator. Further, in order to easily insert the measurement frame body 10 into the soil 2, a jig (attachment) may be attached to the measurement frame body 10. Furthermore, in the said 2nd Embodiment, as shown in FIG. 13, when inserting the measurement flame | frame body 61 in the soil 2, it is the same.
１ 比抵抗測定装置
２ 土壌
４ 比抵抗測定器
５ デジタル交流抵抗計
１０ 測定フレーム体
１１，１２ 一方および他方のフレーム
１７ａ〜１７ｅ 第１電極
１８ａ〜１８ｅ 第２電極
３５ 水分供給管（水分供給部材）
６１ 測定フレーム体
６２ａ〜６２ｃ，６４ａ〜６４ｃ，６６ａ〜６６ｃ 第１電極
６３ａ〜６３ｃ，６５ａ〜６５ｃ，６７ａ〜６７ｃ 第２電極
Ａ 挿入方向
Ｄ１ 第１電極間の間隔
Ｄ２ 第２電極間の間隔
Ｄ３ 第１電極と第２電極との間の間隔
DESCRIPTION OF SYMBOLS 1 Resistivity measuring apparatus 2 Soil 4 Resistivity measuring instrument 5 Digital alternating current ohmmeter 10 Measurement frame bodies 11 and 12 One and the other flame | frames 17a-17e 1st electrode 18a-18e 2nd electrode 35
61 Measurement frame bodies 62a to 62c, 64a to 64c, 66a to 66c First electrodes 63a to 63c, 65a to 65c, 67a to 67c Second electrode A Insertion direction D 1 Distance between first electrodes D 2 Between second electrodes spacing between the interval D 3 first electrode and the second electrode
Claims (7)
土壌中に挿入可能な測定フレーム体を有し、
測定フレーム体に第１電極と第２電極とが設けられ、
第１電極と第２電極とは、測定フレーム体の挿入方向を横切る方向において、間隔をあけて対向しており、
対向する一対の第１電極と第２電極との間の電流と電位差とに基づいて比抵抗値を測定可能であることを特徴とする比抵抗測定装置。 A resistivity measuring device used to measure the resistivity of soil,
It has a measuring frame that can be inserted into the soil,
The measurement frame body is provided with a first electrode and a second electrode;
The first electrode and the second electrode are opposed to each other with a gap in the direction crossing the insertion direction of the measurement frame body,
A specific resistance measuring device capable of measuring a specific resistance value based on a current and a potential difference between a pair of opposing first and second electrodes.
これら第１電極と第２電極とが、測定フレーム体の挿入方向を横切る方向において、間隔をあけて対向しており、
測定フレーム体の挿入方向における一対の第１電極間の電流と電位差とに基づく第１の比抵抗値と、測定フレーム体の挿入方向における一対の第２電極間の電流と電位差とに基づく第２の比抵抗値と、対向する一対の第１電極と第２電極との間の電流と電位差とに基づく第３の比抵抗値とを測定可能に構成されていることを特徴とする請求項１に記載の比抵抗測定装置。 The plurality of first electrodes and the plurality of second electrodes are each arranged in a column in the insertion direction of the measurement frame body,
The first electrode and the second electrode are opposed to each other with an interval in a direction crossing the insertion direction of the measurement frame body,
A first specific resistance value based on the current and potential difference between the pair of first electrodes in the insertion direction of the measurement frame body, and a second value based on the current and potential difference between the pair of second electrodes in the insertion direction of the measurement frame body. And a third specific resistance value based on a current and a potential difference between a pair of first and second electrodes facing each other. The specific resistance measuring device according to 1.
測定フレーム体の挿入方向において隣同士である一対の第２電極間の電流と電位差と間隔をそれぞれＩ２、Ｖ２、Ｄ２とし、
対向する第１電極と第２電極との間の電流と電位差と間隔をそれぞれＩ３、Ｖ３、Ｄ３とすると、
第１の比抵抗値＝２×π×Ｄ１×（Ｖ１／Ｉ１）
第２の比抵抗値＝２×π×Ｄ２×（Ｖ２／Ｉ２）
第３の比抵抗値＝４×π×Ｄ３×（Ｖ３／Ｉ３）
という換算式に基づいて比抵抗値を求めることが可能であることを特徴とする請求項２又は請求項３記載の比抵抗測定装置。 I 1 , V 1 , and D 1 are the current, potential difference, and spacing between a pair of first electrodes adjacent to each other in the insertion direction of the measurement frame body, respectively.
I 2 , V 2 , and D 2 respectively represent the current, potential difference, and spacing between a pair of second electrodes that are adjacent to each other in the insertion direction of the measurement frame body.
Assuming that the current, potential difference, and interval between the opposing first electrode and second electrode are I 3 , V 3 , and D 3 , respectively,
First specific resistance value = 2 × π × D 1 × (V 1 / I 1 )
Second specific resistance value = 2 × π × D 2 × (V 2 / I 2 )
Third specific resistance value = 4 × π × D 3 × (V 3 / I 3 )
The specific resistance measuring device according to claim 2, wherein the specific resistance value can be obtained based on the conversion formula.
複数の第１電極は、一方のフレームに、測定フレーム体の挿入方向において縦列に並べられて設けられ、
複数の第２電極は、他方のフレームに、測定フレーム体の挿入方向において縦列に並べられて設けられていることを特徴とする請求項２から請求項５のいずれか１項に記載の比抵抗測定装置。 The measurement frame body has a pair of opposed frames,
The plurality of first electrodes are provided in one frame, arranged in a column in the insertion direction of the measurement frame body,
The specific resistance according to any one of claims 2 to 5, wherein the plurality of second electrodes are arranged in a column in the insertion direction of the measurement frame body on the other frame. measuring device.
比抵抗測定器が抵抗計に接続されていることを特徴とする請求項１から請求項６のいずれか１項に記載の比抵抗測定装置。 A measurement frame body is provided in the specific resistance measuring instrument,
The specific resistance measuring device according to any one of claims 1 to 6, wherein the specific resistance measuring instrument is connected to an ohmmeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016209124A JP6774837B2 (en) | 2016-10-26 | 2016-10-26 | Soil resistivity measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016209124A JP6774837B2 (en) | 2016-10-26 | 2016-10-26 | Soil resistivity measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2018072052A true JP2018072052A (en) | 2018-05-10 |
| JP6774837B2 JP6774837B2 (en) | 2020-10-28 |
Family
ID=62114985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2016209124A Active JP6774837B2 (en) | 2016-10-26 | 2016-10-26 | Soil resistivity measuring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP6774837B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111141785A (en) * | 2020-02-26 | 2020-05-12 | 防灾科技学院 | Soil resistivity measuring device and method and storage medium |
| JP2020176969A (en) * | 2019-04-22 | 2020-10-29 | 東急建設株式会社 | Sampling mold and non-destructive physical property measuring method for soil |
| WO2021091137A1 (en) * | 2019-11-05 | 2021-05-14 | 고려대학교 산학협력단 | Apparatus for evaluating characteristics of ground including metal components |
| KR20220011951A (en) * | 2020-07-22 | 2022-02-03 | 한국과학기술연구원 | Soil sensing system and soil sensing apparatus |
| CN114397337A (en) * | 2022-01-29 | 2022-04-26 | 江苏徐工工程机械研究院有限公司 | Soil adhesion force testing device and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11248664A (en) * | 1998-03-02 | 1999-09-17 | Ohbayashi Corp | Abnormality detecting method for non-reinforced concrete wall |
| JP2000046510A (en) * | 1998-07-28 | 2000-02-18 | Ohbayashi Corp | Method and system for measuring improved body |
| JP2004183434A (en) * | 2002-12-06 | 2004-07-02 | Tenox Corp | Tip jig for device for measuring specific resistance of unhardened ground-improving body |
| JP2013083606A (en) * | 2011-10-12 | 2013-05-09 | Fujitsu Ltd | Dielectric constant sensor |
-
2016
- 2016-10-26 JP JP2016209124A patent/JP6774837B2/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11248664A (en) * | 1998-03-02 | 1999-09-17 | Ohbayashi Corp | Abnormality detecting method for non-reinforced concrete wall |
| JP2000046510A (en) * | 1998-07-28 | 2000-02-18 | Ohbayashi Corp | Method and system for measuring improved body |
| JP2004183434A (en) * | 2002-12-06 | 2004-07-02 | Tenox Corp | Tip jig for device for measuring specific resistance of unhardened ground-improving body |
| JP2013083606A (en) * | 2011-10-12 | 2013-05-09 | Fujitsu Ltd | Dielectric constant sensor |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020176969A (en) * | 2019-04-22 | 2020-10-29 | 東急建設株式会社 | Sampling mold and non-destructive physical property measuring method for soil |
| JP7082955B2 (en) | 2019-04-22 | 2022-06-09 | 東急建設株式会社 | Sampling mold and non-destructive property measurement method for soil |
| WO2021091137A1 (en) * | 2019-11-05 | 2021-05-14 | 고려대학교 산학협력단 | Apparatus for evaluating characteristics of ground including metal components |
| US11977199B2 (en) | 2019-11-05 | 2024-05-07 | Korea University Research And Business Foundation | Device for evaluating characteristics of target ground containing metal component |
| CN111141785A (en) * | 2020-02-26 | 2020-05-12 | 防灾科技学院 | Soil resistivity measuring device and method and storage medium |
| CN111141785B (en) * | 2020-02-26 | 2023-04-25 | 防灾科技学院 | Soil resistivity measuring device, method and storage medium |
| KR20220011951A (en) * | 2020-07-22 | 2022-02-03 | 한국과학기술연구원 | Soil sensing system and soil sensing apparatus |
| KR102384262B1 (en) * | 2020-07-22 | 2022-04-08 | 한국과학기술연구원 | Soil sensing system and soil sensing apparatus |
| CN114397337A (en) * | 2022-01-29 | 2022-04-26 | 江苏徐工工程机械研究院有限公司 | Soil adhesion force testing device and method |
| CN114397337B (en) * | 2022-01-29 | 2023-11-07 | 江苏徐工工程机械研究院有限公司 | Soil adhesion testing device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6774837B2 (en) | 2020-10-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2018072052A (en) | Specific resistance measuring apparatus of soil | |
| US1910021A (en) | Soil testing apparatus | |
| CN107505256A (en) | Weld corrosion monitoring device and its monitoring method under stress can be simulated | |
| JP2015028458A (en) | Electric specific resistance survey data acquisition method | |
| JP2010266342A (en) | Metal corrosion diagnostic method | |
| Liu et al. | Laboratory measurement techniques of the electrical resistivity of soils. | |
| KR101127071B1 (en) | Device and method for measuring | |
| Ochs et al. | Considerations regarding small-scale surface and borehole-to-surface electrical resistivity tomography | |
| CN216209428U (en) | Device for measuring stray current of soil near buried pipeline | |
| JP2588370B2 (en) | Estimation method of ground resistance corresponding to burial depth of rod-shaped ground electrode | |
| CN110023769B (en) | Resistivity measuring unit for measuring resistivity anisotropy of unsaturated soil | |
| CN114114431B (en) | Small polar distance potential extraction method based on dual-mode parallel electrical method | |
| CN206348292U (en) | Polluted Soil detection arrangement of measuring-line structure based on three-dimensional high-density resistivity method | |
| JP6158961B1 (en) | Steel material potential measuring method and steel material potential measuring device | |
| CN109115104A (en) | A kind of measuring method based on magnetic susceptibility measurement soil horizon thickness | |
| JP2020046440A (en) | Soil corrosiveness evaluation device | |
| JP3303130B2 (en) | Mixing amount measuring device and monitoring device for mixed substances | |
| Labini et al. | A study for optimizing the number of subareas in the Maxwell's method | |
| KR20090032380A (en) | Apparatus and method for specific earth resistance test for distribution grounding by three pole type | |
| JP2017129436A (en) | Soil permeability evaluation method and soil permeability measuring apparatus | |
| JP3455774B2 (en) | Device for measuring the amount of mixture in the substance to be measured | |
| Seo et al. | Electrical resistivity of soils due to cyclic freezing and thawing | |
| Nor et al. | Validation of the calculation and measurement techniques of earth resistance values | |
| Butler | Analysis of the moments of the sensitivity function for resistivity over a homogeneous half-space: Rules of thumb for pseudoposition, offline sensitivity and resolution | |
| JPH05203600A (en) | Calculation of impedance index and measuring method for degree of pipe corrosion by use of the index |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20190614 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20200427 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20200616 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20200716 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20200908 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20201005 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 6774837 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |