JP4948426B2 - Strain gauge calibration system, strain gauge calibration device, and strain gauge calibration method - Google Patents

Strain gauge calibration system, strain gauge calibration device, and strain gauge calibration method Download PDF

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JP4948426B2
JP4948426B2 JP2008002029A JP2008002029A JP4948426B2 JP 4948426 B2 JP4948426 B2 JP 4948426B2 JP 2008002029 A JP2008002029 A JP 2008002029A JP 2008002029 A JP2008002029 A JP 2008002029A JP 4948426 B2 JP4948426 B2 JP 4948426B2
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strain gauge
fixing member
fixed shaft
slide shaft
displacement amount
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JP2009162679A (en
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秀高 西田
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Chugoku Electric Power Co Inc
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Description

本発明は、歪計の変位量と出力信号との関係を測定するために用いられる歪計に所望の変位を加えるための歪計校正装置、この歪計校正装置を用いた校正システム及び校正方法に関する。   The present invention relates to a strain gauge calibration apparatus for applying a desired displacement to a strain gauge used for measuring the relationship between the displacement amount of the strain gauge and an output signal, a calibration system using the strain gauge calibration apparatus, and a calibration method. About.

例えば火力発電所における、ボイラやタービンあるいはそれらの配管など、熱影響を受けやすい金属溶接部などの余寿命を検査する方法の一つとして、歪測定法が知られている。この歪測定法は、測定対象物表面の歪から金属溶接部などの余寿命を検査するものであるが、これらの計測対象面が表面温度６００℃以上の高温になるため、高温下での測定が可能な歪計が必要である。   For example, a strain measurement method is known as one of methods for inspecting the remaining life of heat-sensitive metal welds such as boilers, turbines, and their piping in thermal power plants. This strain measurement method is for inspecting the remaining life of a metal welded part etc. from the strain on the surface of the object to be measured. It is necessary to have a strain gauge capable of

このような歪計として、発明者らは、例えば、図３に示すように、筒状に構成された第１の電極１２ａと、第１の電極１２ａの内側へ進退可能とされ、第１の電極１２ａと共にコンデンサを構成する第２の電極１２ｂと、第１の電極１２ａを支持するセラミック製の第１の絶縁支持体１４ａと、第２の電極１２ｂを支持する第２の絶縁支持体１４ｂと、第１及び第２の絶縁支持体１４ａ，１４ｂを測定対象物３に夫々取付ける取付部材１６と、を備えた歪計１０を提案している（特願２００６−１４４０７４号、特願２００６−１４４０７５号）。   As such a strain gauge, for example, as shown in FIG. 3, the inventors are capable of moving back and forth inside the first electrode 12 a configured in a cylindrical shape and the first electrode 12 a, A second electrode 12b that constitutes a capacitor together with the electrode 12a, a ceramic first insulating support 14a that supports the first electrode 12a, a second insulating support 14b that supports the second electrode 12b, Have proposed a strain gauge 10 including a mounting member 16 for mounting the first and second insulating supports 14a and 14b to the measurement object 3 (Japanese Patent Application Nos. 2006-144074 and 2006-144075). issue).

このような歪計１０は、出力された信号に基づき歪を測定するため、予め、出力信号と歪計１０に生じた変位との関係を求めておく必要がある。従来は、平滑な試験片の表面に歪計１０を取り付けるとともに、裏面に変位計を取り付けておき、試験片に引張又は圧縮荷重を加えて変形させて、その際に測定された歪計より出力信号と、変位計により測定された変位との関係に基づき、出力信号と変位との関係を求めていた。   Since such a strain gauge 10 measures strain based on the output signal, it is necessary to obtain a relationship between the output signal and the displacement generated in the strain gauge 10 in advance. Conventionally, a strain gauge 10 is attached to the surface of a smooth test piece, and a displacement gauge is attached to the back face, and the test piece is deformed by applying a tensile or compression load, and output from the strain gauge measured at that time. Based on the relationship between the signal and the displacement measured by the displacement meter, the relationship between the output signal and the displacement was obtained.

しかしながら、上記の方法では、試験片に引張又は圧縮荷重を加える際にヒステリシスが生じるため、試験片に任意の変位量を精度良く設定するのが困難である。   However, in the above method, since hysteresis occurs when a tensile or compressive load is applied to the test piece, it is difficult to accurately set an arbitrary displacement amount on the test piece.

本発明は、上記の問題に鑑みなされたものであり、その目的は、歪計に所望の変位量を精度良く加えることができるようにすることである。   The present invention has been made in view of the above problems, and an object of the present invention is to enable a desired displacement amount to be accurately added to a strain gauge.

本発明の歪計校正システムは、所定の直線方向に相対的に変位可能な一対の測定部材間の相対変位量に応じた信号を出力する歪計の出力信号と前記相対変位量との関係を測定するための歪計校正システムであって、前記所定の直線方向に延びる長尺の固定シャフトと、前記固定シャフトの一端に固定され、前記一対の測定部材の何れか一方を固定可能な第１の固定部材と、前記固定シャフトに沿って移動可能であり、前記一対の測定部材の他方を固定可能な第２の固定部材と、前記第１の固定部材と前記第２の固定部材との相対変位量を所望の値に調整可能な間隔調整機構とを備えた歪計校正装置と、前記歪計の出力信号を測定する出力信号測定装置とを備え、前記間隔調整機構は、前記第２の固定部材に一端が接続され、前記固定シャフトと平行に進退可能なスライドシャフトと、突出部と、当該突出部を所望の幅、進退させることが可能なマイクロメータと、前記スライドシャフトに前記マイクロメータに向かう引張力を加え、前記スライドシャフトの他端と前記突出部とが当接した状態を保つばね部材とからなり、前記歪計は、高温下で使用される高温歪計であり、前記固定シャフト、前記第１の固定部材、前記第２の固定部材、及び前記スライドシャフトは、セラミックス又はＳＵＳ製であり、前記固定シャフト及び前記スライドシャフトは放熱フィンを有することを特徴とする。 The strain gauge calibration system according to the present invention provides a relationship between an output signal of a strain gauge that outputs a signal corresponding to a relative displacement amount between a pair of measurement members that can be relatively displaced in a predetermined linear direction, and the relative displacement amount. A strain gauge calibration system for measuring, comprising: a long fixed shaft extending in the predetermined linear direction; a first fixed shaft fixed to one end of the fixed shaft and capable of fixing either one of the pair of measuring members; A fixing member, a second fixing member that is movable along the fixing shaft and that can fix the other of the pair of measuring members, and a relative relationship between the first fixing member and the second fixing member. A strain gauge calibration device including an interval adjustment mechanism capable of adjusting a displacement amount to a desired value; and an output signal measurement device that measures an output signal of the strain meter, wherein the interval adjustment mechanism includes the second adjustment device . One end is connected to the fixed member, and the fixed shaft A slide shaft that can advance and retreat in parallel, a protrusion, a micrometer that can advance and retreat the protrusion with a desired width, and a tensile force that is directed to the micrometer are applied to the slide shaft. The strain gauge is a high-temperature strain gauge used at a high temperature, and the fixed shaft, the first fixed member, and the second The fixing member and the slide shaft are made of ceramics or SUS, and the fixed shaft and the slide shaft have heat radiation fins .

また、本発明の歪計校正装置は、所定の直線方向に相対的に変位可能な一対の測定部材間の相対変位量に応じた信号を出力する歪計の出力信号と前記相対変位量との関係を測定する際に、前記歪計の一対の測定部材間の間隔を所望の間隔に調整するための校正装置であって、前記所定の直線方向に延びる長尺の固定シャフトと、前記固定シャフトの一端に固定され、前記一対の測定部材の何れか一方を固定可能な第１の固定部材と、前記固定シャフトに沿って移動可能であり、前記一対の測定部材の他方を固定可能な第２の固定部材と、前記第１の固定部材と前記第２の固定部材との相対変位量を所望の値に調整可能な間隔調整機構とを備え、前記間隔調整機構は、前記第２の固定部材に一端が接続され、前記固定シャフトと平行に進退可能なスライドシャフトと、突出部と、当該突出部を所望の幅、進退させることが可能なマイクロメータと、前記スライドシャフトに前記マイクロメータに向かう引張力を加え、前記スライドシャフトの他端と前記突出部とが当接した状態を保つばね部材とからなり、前記歪計は、高温下で使用される高温歪計であり、前記固定シャフト、前記第１の固定部材、前記第２の固定部材、及び前記スライドシャフトは、セラミックス又はＳＵＳ製であり、前記固定シャフト及び前記スライドシャフトは放熱フィンを有することを特徴とする。 Further, the strain gauge calibration apparatus of the present invention includes a strain gauge output signal that outputs a signal corresponding to a relative displacement amount between a pair of measurement members that can be relatively displaced in a predetermined linear direction, and the relative displacement amount. A calibration device for adjusting an interval between a pair of measuring members of the strain gauge to a desired interval when measuring the relationship, the long fixed shaft extending in the predetermined linear direction, and the fixed shaft A first fixing member fixed to one end of the pair of members and capable of fixing either one of the pair of measurement members, and a second member movable along the fixed shaft and capable of fixing the other of the pair of measurement members. And a distance adjusting mechanism capable of adjusting a relative displacement amount between the first fixing member and the second fixing member to a desired value, and the distance adjusting mechanism includes the second fixing member. One end is connected to and can move forward and backward in parallel with the fixed shaft A slide shaft, a projecting portion, a micrometer capable of moving the projecting portion in a desired width, and a pulling force applied to the slide shaft toward the micrometer; and the other end of the slide shaft and the projecting portion And the strain gauge is a high-temperature strain gauge used at high temperature, the fixed shaft, the first fixing member, the second fixing member, and The slide shaft is made of ceramics or SUS, and the fixed shaft and the slide shaft have heat radiation fins .

また、本発明の歪計の校正方法は、所定の直線方向に相対的に変位可能な一対の測定部材間の相対変位量に応じた信号を出力する歪計の出力信号と前記相対変位量との関係を測定する歪計の校正方法であって、 前記所定の直線方向に延びる長尺の固定シャフトと、前記固定シャフトの一端に固定され、前記一対の測定部材の何れか一方を固定可能な第１の固定部材と、前記固定シャフトに沿って移動可能であり、前記一対の測定部材の他方を固定可能な第２の固定部材と、前記第１の固定部材と前記第２の固定部材との相対変位量を所望の値に調整可能な間隔調整機構とを備え、前記間隔調整機構は、前記第２の固定部材に一端が接続され、前記固定シャフトと平行に進退可能なスライドシャフトと、突出部と、当該突出部を所望の幅、進退させることが可能なマイクロメータと、前記スライドシャフトに前記マイクロメータに向かう引張力を加え、前記スライドシャフトの他端と前記突出部とが当接した状態を保つばね部材とからなり、前記歪計は、高温下で使用される高温歪計であり、前記固定シャフト、前記第１の固定部材、前記第２の固定部材、及び前記スライドシャフトは、セラミックス又はＳＵＳ製であり、前記固定シャフト及び前記スライドシャフトは放熱フィンを有する歪計校正装置を用い、前記間隔調整機構により前記第１の固定部材と前記第２の固定部材との相対変位量を変化させて、複数の相対変位位置における前記歪計の出力信号を測定し、測定した前記出力信号に基づき、前記歪計の出力信号と前記一対の測定部材の相対変位量との関係を求めることを特徴とする。 The strain gauge calibration method of the present invention includes an output signal of a strain gauge that outputs a signal corresponding to a relative displacement amount between a pair of measurement members that can be relatively displaced in a predetermined linear direction, and the relative displacement amount. A strain gauge calibration method for measuring the relationship between the long fixed shaft extending in the predetermined linear direction and one end of the fixed shaft, and one of the pair of measuring members can be fixed. A first fixing member; a second fixing member that is movable along the fixing shaft and that can fix the other of the pair of measuring members; the first fixing member; and the second fixing member; A distance adjusting mechanism capable of adjusting a relative displacement amount of the second adjusting member to a desired value , wherein the distance adjusting mechanism has one end connected to the second fixing member and is capable of moving back and forth in parallel with the fixing shaft; Protrusion and the desired width of the protrusion And a spring member that applies a tensile force toward the micrometer to the slide shaft and keeps the other end of the slide shaft in contact with the protrusion. Is a high-temperature strain gauge used at high temperature, and the fixed shaft, the first fixing member, the second fixing member, and the slide shaft are made of ceramics or SUS, and the fixed shaft and the The slide shaft uses a strain gauge calibration device having a radiating fin, and the relative adjustment amount of the first fixing member and the second fixing member is changed by the interval adjusting mechanism, so that the strain at a plurality of relative displacement positions is changed. Measuring the output signal of the meter, and determining the relationship between the output signal of the strain gauge and the relative displacement of the pair of measurement members based on the measured output signal And butterflies.

本発明によれば、歪計の両端が固定された固定部材の間隔を任意に設定することができ、歪計に所望の変位量を精度良く加えることができる。   According to the present invention, it is possible to arbitrarily set the interval between the fixing members to which both ends of the strain gauge are fixed, and it is possible to accurately add a desired displacement amount to the strain gauge.

以下、本発明の歪計の変位量と出力電圧との関係を求めるために用いられる歪計校正システムの一実施形態を図面を参照しながら、詳細に説明する。
図１は、本実施形態の歪計校正システム１００を示す図である。また、図２は、歪計校正システムを構成する歪計校正装置２０の側面図である。図１に示すように、歪計校正システム１００は、歪計１０が取り付けられる歪計校正装置２０と、歪計１０に接続されたアンプ５０及び電圧計５１により構成される。歪計校正装置２０は、従来技術の欄で説明したような、高温下において使用可能な歪計１０の出力電圧と変位量の関係を求める際に、歪計１０に所望の変位を加えるためのものである。 Hereinafter, an embodiment of a strain gauge calibration system used for obtaining the relationship between the displacement amount of the strain gauge of the present invention and the output voltage will be described in detail with reference to the drawings.
FIG. 1 is a diagram showing a strain gauge calibration system 100 of the present embodiment. FIG. 2 is a side view of the strain gauge calibration apparatus 20 constituting the strain gauge calibration system. As shown in FIG. 1, the strain gauge calibration system 100 includes a strain gauge calibration device 20 to which the strain gauge 10 is attached, an amplifier 50 and a voltmeter 51 connected to the strain gauge 10. The strain gauge calibration device 20 applies a desired displacement to the strain gauge 10 when determining the relationship between the output voltage of the strain gauge 10 that can be used at a high temperature and the displacement amount as described in the section of the prior art. Is.

図１及び図２に示すように、歪計校正装置２０は、互いに平行に延びるように配置された一対の固定シャフト２１と、固定シャフト２１の中間部に、固定シャフト２１の軸方向に適宜な間隔をあけて固定され、貫通孔２２ａ、２３ａを有する第１及び第２のガイド部材２２、２３と、これら第１及び第２のガイド部材２２、２３の貫通孔２２ａ、２３ａを貫通し、第１及び第２のガイド部材２２、２３に案内されて固定シャフト２１に対して平行に変位可能なスライドシャフト２４と、固定シャフト２１の一端（図中下端）に固定された第１の歪計固定部材２５と、固定シャフト２１が貫通する貫通孔２６ｂを有し、固定シャフト２１に沿って移動可能な第２の歪計固定部材２６と、固定シャフト２１の他端（図中上端）近傍に取り付けられたマイクロメータ保持部２７と、マイクロメータ保持部２７に取り付けられたマイクロメータ３０と、を備えている。固定シャフト２１及びスライドシャフト２４の第２のガイド部材２３とマイクロメータ保持部２７との間の部分には放熱フィン２１ａが取り付けられている。   As shown in FIG. 1 and FIG. 2, the strain gauge calibration device 20 includes a pair of fixed shafts 21 arranged so as to extend in parallel to each other, and an intermediate portion between the fixed shafts 21 in the axial direction of the fixed shaft 21. First and second guide members 22 and 23 having through holes 22a and 23a, which are fixed at intervals, and through the through holes 22a and 23a of the first and second guide members 22 and 23, A slide shaft 24 that is guided by the first and second guide members 22 and 23 and can be displaced parallel to the fixed shaft 21, and a first strain gauge fixed to one end (lower end in the figure) of the fixed shaft 21 The member 25 has a through-hole 26b through which the fixed shaft 21 passes, and is attached in the vicinity of the second strain gauge fixing member 26 movable along the fixed shaft 21 and the other end (upper end in the figure) of the fixed shaft 21. Is A micrometer holding portion 27, and a micrometer 30 attached to the micrometer holding portion 27, a. Radiating fins 21 a are attached to portions of the fixed shaft 21 and the slide shaft 24 between the second guide member 23 and the micrometer holding portion 27.

スライドシャフト２４及び固定シャフト２１は、セラミック製であり、それ以外の部材はＳＵＳ３０４製である。後述するように歪計校正装置２０は、第１及び第２の歪計固定部材２５、２６を高温（例えば、６００℃程度）の加熱炉の中で用いられるが、歪計校正装置２０の構成部材がセラミック又はＳＵＳ３０４からなるものとしたため、高温に対する耐性を十分有する。   The slide shaft 24 and the fixed shaft 21 are made of ceramic, and the other members are made of SUS304. As will be described later, the strain gauge calibration apparatus 20 uses the first and second strain gauge fixing members 25 and 26 in a high-temperature heating furnace (for example, about 600 ° C.). Since the member is made of ceramic or SUS304, it has sufficient resistance to high temperatures.

マイクロメータ３０は、その表面よりスピンドル３１が突出しており、ハンドル部３３を回転することによりスピンドル３１を進退させることができ、その進退量が表示部３２に表示されるようになっている。   The spindle 31 protrudes from the surface of the micrometer 30, and the spindle 31 can be advanced and retracted by rotating the handle portion 33, and the advance / retreat amount is displayed on the display unit 32.

第１の歪計固定部材２５及び第２の歪計固定部材２６には、取付孔２５ａ、２６ａが設けられており、この取付孔２５ａ、２６ａに歪計１０の絶縁支持体１４ａ，１４ｂが固定される。   The first strain gauge fixing member 25 and the second strain gauge fixing member 26 are provided with mounting holes 25a and 26a, and the insulating supports 14a and 14b of the strain gauge 10 are fixed to the mounting holes 25a and 26a. Is done.

スライドシャフト２４は、第１及び第２のガイド部材２２、２３により案内され、固定シャフト２１と平行に変位可能である。スライドシャフト２４が変位すると、第２の歪計固定部材２６が固定シャフト２１に沿って、第１の歪計固定部材２５に対して近接又は離間する方向に移動する。   The slide shaft 24 is guided by the first and second guide members 22 and 23 and can be displaced in parallel with the fixed shaft 21. When the slide shaft 24 is displaced, the second strain gauge fixing member 26 moves along the fixed shaft 21 in a direction approaching or separating from the first strain gauge fixing member 25.

マイクロメータ保持部２７は、マイクロメータ３０を保持可能であるとともに、マイクロメータ３０のスピンドル３１をスライドシャフト２４の端面に向けて突出させるための孔２７ａが形成されている。また、スライドシャフト２４のマイクロメータ３０側の端部近傍には板状部材４０が取り付けられており、この板状部材４０とマイクロメータ保持部２７との間にはばね４１が取り付けられている。これにより、スピンドル３１を進退させてもスライドシャフト２４のマイクロメータ３０側の端部とスピンドル３１とが接触した状態が保たれる。なお、ばね４１としてはコイルばねや板ばねを用いることができる。   The micrometer holding unit 27 can hold the micrometer 30 and is formed with a hole 27 a for projecting the spindle 31 of the micrometer 30 toward the end surface of the slide shaft 24. A plate-like member 40 is attached near the end of the slide shaft 24 on the micrometer 30 side, and a spring 41 is attached between the plate-like member 40 and the micrometer holding portion 27. Thereby, even if the spindle 31 is advanced and retracted, the state where the end of the slide shaft 24 on the micrometer 30 side and the spindle 31 are in contact with each other is maintained. As the spring 41, a coil spring or a leaf spring can be used.

マイクロメータ３０のスピンドル３１を突出させると、スライドシャフト２４を介して第２の歪計固定部材２６が第１の歪計固定部材２５に向けて変位する。これにより、スピンドル３１の突出量と同じ距離だけ第１の歪計固定部材２５と第２の歪計固定部材２６とを近接させることができる。また、逆に、スピンドル３１を退行させると、ばね４１の収縮力によりスライドシャフト２４を介して第１の歪計固定部材２５を引き戻し、スピンドル３１の退行量と同じ距離だけ、第２の歪計固定部材２６を第１の歪計固定部材２５から離間させることができる。このように、マイクロメータ３０のスピンドル３１の進退量と同じ距離だけ、第２の歪計固定部材２６を第１の歪計固定部材２５に対して近接又は離間する方向に変位させることができ、その変位量はマイクロメータ３０の表示部３２により視認できる。   When the spindle 31 of the micrometer 30 is protruded, the second strain gauge fixing member 26 is displaced toward the first strain gauge fixing member 25 via the slide shaft 24. Thereby, the first strain gauge fixing member 25 and the second strain gauge fixing member 26 can be brought close to each other by the same distance as the protruding amount of the spindle 31. Conversely, when the spindle 31 is retracted, the first strain gauge fixing member 25 is pulled back via the slide shaft 24 by the contraction force of the spring 41, and the second strain gauge is moved by the same distance as the retract amount of the spindle 31. The fixing member 26 can be separated from the first strain gauge fixing member 25. In this way, the second strain gauge fixing member 26 can be displaced in the direction of approaching or separating from the first strain gauge fixing member 25 by the same distance as the advance / retreat amount of the spindle 31 of the micrometer 30. The displacement amount can be visually recognized by the display unit 32 of the micrometer 30.

高温条件下における歪計１０の出力電圧と、歪との関係を調べる場合には、図１に示すように、第１の歪計固定部材２６及び第２の歪計固定部材２５に、歪計１０の第１の絶縁支持体１４ａ及び第２の絶縁支持体１４ｂを固定し、歪計１０にアンプ５１を介して電圧計５０を接続する。   When investigating the relationship between the output voltage of the strain gauge 10 under high temperature conditions and the strain, as shown in FIG. 1, the first strain gauge fixing member 26 and the second strain gauge fixing member 25 are connected to the strain gauge. Ten first insulating supports 14 a and second insulating supports 14 b are fixed, and a voltmeter 50 is connected to the strain gauge 10 via an amplifier 51.

そして、歪計１０が高温の加熱炉内に位置するように、歪計校正装置２０の中間部より歪計１０の取り付けられている側を加熱炉内に挿入する。このように加熱炉内に一部を挿入することにより、歪計校正装置２０は高温に曝されるが、上記のように歪計校正装置２０を構成する部材はセラミック及びＳＵＳ３０４で構成されており、焼付け等をおこすことがない。また、固定シャフト２１及びスライドシャフト２４に取り付けられた放熱フィン２１ａ、２４ａにより熱が放出されるため、マイクロメータ３０が高温になるのを防ぐことができる。   Then, the side on which the strain gauge 10 is attached is inserted into the heating furnace from the middle part of the strain gauge calibration apparatus 20 so that the strain gauge 10 is positioned in the high temperature heating furnace. By inserting a part into the heating furnace in this way, the strain gauge calibration device 20 is exposed to a high temperature. As described above, the members constituting the strain gauge calibration device 20 are made of ceramic and SUS304. Does not cause baking. Moreover, since heat is released by the radiation fins 21a and 24a attached to the fixed shaft 21 and the slide shaft 24, the micrometer 30 can be prevented from becoming high temperature.

かかる状態において、表示部３２を確認しながらマイクロメータ３０のスピンドル３１を進退させ、スピンドル３１の変位量を複数通りに設定し、各変位量での歪計１０から出力される出力電圧を電圧計５０により測定する。上記のようにマイクロメータ３０のスピンドル３１の進退量と第１の歪計固定部材２５及び第２の歪計固定部材２６の間隔の変位量は等しいため、このように、スピンドル３１の進退量と、それに対応する出力電圧の関係を求めることにより、歪計２０の変位量と出力電圧の関係を求めることができる。   In this state, the spindle 31 of the micrometer 30 is moved forward and backward while checking the display unit 32, the displacement amount of the spindle 31 is set in plural ways, and the output voltage output from the strain gauge 10 at each displacement amount is set to a voltmeter. 50. Since the advance / retreat amount of the spindle 31 of the micrometer 30 is equal to the displacement amount of the interval between the first strain gauge fixing member 25 and the second strain gauge fixing member 26 as described above, the advance / retreat amount of the spindle 31 is thus determined. The relationship between the displacement amount of the strain gauge 20 and the output voltage can be determined by determining the relationship between the corresponding output voltages.

以上説明したように、本実施形態によれば、マイクロメータ３０のスピンドル３１の進退量に応じた長さだけ、歪計１０の１４ａ、１４ｂが固定された第１の歪計固定部材２５及び第２の歪計固定部材２６の間隔を近接又は離間させることができるため、歪計１０の変位量を所望の値とすることができる。   As described above, according to the present embodiment, the first strain gauge fixing member 25 and the first strain gauge fixing member 25 to which the strain gauges 14a and 14b are fixed have a length corresponding to the advance / retreat amount of the spindle 31 of the micrometer 30. Since the distance between the two strain gauge fixing members 26 can be close or separated, the displacement amount of the strain gauge 10 can be set to a desired value.

また、スライドシャフト２４がセラミック製であり、これをガイドする第１及び第２のガイド部材２２、２３がステンレス（ＳＵＳ３０４）製であるため、高温下において、両者が焼き付くのを防止できる。
また、歪計１０を取り付ける際に溶接等を行う必要がないため、設置作業に手間がかからず、測定作業の効率を向上することができる。 Moreover, since the slide shaft 24 is made of ceramic and the first and second guide members 22 and 23 for guiding the slide shaft 24 are made of stainless steel (SUS304), they can be prevented from seizing at high temperatures.
Further, since it is not necessary to perform welding or the like when attaching the strain gauge 10, installation work is not time-consuming and the efficiency of the measurement work can be improved.

なお、本実施形態では、マイクロメータ３０のスピンドル３１を所望の長さだけ進退させることにより、第１及び第２の歪計固定部材２５、２６を近接又は離間させて、歪計１０に所望の変位を加えることとしたが、これに限らず、第１及び第２の歪計固定部材２５、２６を所望の長さ近接又は離間させる機構であればこれに変えて用いることができる。
また、本実施形態では、スライドシャフト２４に取り付けられた板状部材４０とマイクロメータ保持部２７との間にばね４１を取り付けることにより、スライドシャフト２４とマイクロメータ３０のスピンドル３１が当接した状態を保つものとしたが、これに限らず、スライドシャフト２４にマイクロメータ３０に向かうような磁力を加えてもよく、要するに、スライドシャフト２４にマイクロメータ３０に向かうような力を加える機構を有すれば、スライドシャフト２４とマイクロメータ３０のスピンドル３１が当接した状態を保つことができる。 In the present embodiment, the first and second strain gauge fixing members 25 and 26 are moved closer to or away from each other by moving the spindle 31 of the micrometer 30 forward and backward by a desired length. Although the displacement is applied, the present invention is not limited to this, and any mechanism that moves the first and second strain gauge fixing members 25 and 26 close to or apart from each other by a desired length can be used.
In this embodiment, the spring 41 is attached between the plate-like member 40 attached to the slide shaft 24 and the micrometer holding portion 27 so that the slide shaft 24 and the spindle 31 of the micrometer 30 are in contact with each other. However, the present invention is not limited to this, and a magnetic force toward the micrometer 30 may be applied to the slide shaft 24. In short, a mechanism for applying a force toward the micrometer 30 to the slide shaft 24 is provided. In this case, the slide shaft 24 and the spindle 31 of the micrometer 30 can be kept in contact with each other.

また、本実施形態では、高温状況下における歪計１０の変位と出力電圧との関係を調べる場合について説明したが、これに限らず、常温下における歪計１０の変位と出力電圧との関係を調べる場合であっても、本実施形態の歪計校正装置２０を用いることができる。   Moreover, although this embodiment demonstrated the case where the relationship between the displacement of the strain gauge 10 and output voltage in a high temperature condition was investigated, not only this but the relationship between the displacement of the strain gauge 10 and output voltage in normal temperature is demonstrated. Even when examining, the strain gauge calibration apparatus 20 of the present embodiment can be used.

また、本実施形態では、変位に応じた電圧を出力する歪計１０の変位と出力電圧との関係を求める場合について説明したが、これに限らず、変位に応じた信号を出力する歪計の変位と出力信号との関係を求める場合であれば本発明を用いることができる。   In the present embodiment, the case of obtaining the relationship between the displacement of the strain gauge 10 that outputs a voltage corresponding to the displacement and the output voltage has been described. However, the present invention is not limited to this, and the strain gauge that outputs a signal corresponding to the displacement. The present invention can be used if the relationship between the displacement and the output signal is obtained.

本実施形態の歪計校正システムを示す図である。It is a figure which shows the strain gauge calibration system of this embodiment. 歪計構成装置の側面図である。It is a side view of a strain gauge constituting apparatus. 歪計の構成を示す図である。It is a figure which shows the structure of a strain meter.

符号の説明Explanation of symbols

１０ 歪計
１２ａ 第１の電極
１２ｂ 第２の電極
１４ａ 第１の絶縁支持体
１４ｂ 第２の絶縁支持体
１６ 取付部材
２０ 歪計校正装置
２１ 固定シャフト
２１ａ 放熱フィン
２２ 第１のガイド部材
２３ 第２のガイド部材
２４ スライドシャフト
２４ａ 放熱フィン
２５ 第１の歪計固定部材
２６ 第２の歪計固定部材
２７ マイクロメータ保持部材
３０ マイクロメータ
４０ 板状部材
４１ ばね
５０ 電圧計
５１ アンプ
１００ 歪計構成システム DESCRIPTION OF SYMBOLS 10 Strain meter 12a 1st electrode 12b 2nd electrode 14a 1st insulation support body 14b 2nd insulation support body 16 Attachment member 20 Strain gauge calibration apparatus 21 Fixed shaft 21a Radiation fin 22 1st guide member 23 2nd Guide member 24 Slide shaft 24a Radiating fin 25 First strain gauge fixing member 26 Second strain gauge fixing member 27 Micrometer holding member 30 Micrometer 40 Plate member 41 Spring 50 Voltmeter 51 Amplifier 100 Strain gauge configuration system

Claims (3)

所定の直線方向に相対的に変位可能な一対の測定部材間の相対変位量に応じた信号を出力する歪計の出力信号と前記相対変位量との関係を測定するための歪計校正システムであって、
前記所定の直線方向に延びる長尺の固定シャフトと、
前記固定シャフトの一端に固定され、前記一対の測定部材の何れか一方を固定可能な第１の固定部材と、
前記固定シャフトに沿って移動可能であり、前記一対の測定部材の他方を固定可能な第２の固定部材と、
前記第１の固定部材と前記第２の固定部材との相対変位量を所望の値に調整可能な間隔調整機構とを備えた歪計校正装置と、
前記歪計の出力信号を測定する出力信号測定装置とを備え、
前記間隔調整機構は、前記第２の固定部材に一端が接続され、前記固定シャフトと平行に進退可能なスライドシャフトと、突出部と、当該突出部を所望の幅、進退させることが可能なマイクロメータと、前記スライドシャフトに前記マイクロメータに向かう引張力を加え、前記スライドシャフトの他端と前記突出部とが当接した状態を保つばね部材とからなり、
前記歪計は、高温下で使用される高温歪計であり、
前記固定シャフト、前記第１の固定部材、前記第２の固定部材、及び前記スライドシャフトは、セラミックス又はＳＵＳ製であり、
前記固定シャフト及び前記スライドシャフトは放熱フィンを有することを特徴とする歪計校正システム。 A strain gauge calibration system for measuring a relationship between an output signal of a strain gauge that outputs a signal corresponding to a relative displacement amount between a pair of measurement members that can be relatively displaced in a predetermined linear direction and the relative displacement amount. There,
An elongated fixed shaft extending in the predetermined linear direction ;
A first fixing member fixed to one end of the fixed shaft and capable of fixing either one of the pair of measurement members ;
A second fixing member movable along the fixed shaft and capable of fixing the other of the pair of measurement members ;
A strain gauge calibration device including a distance adjusting mechanism capable of adjusting a relative displacement amount between the first fixing member and the second fixing member to a desired value;
An output signal measuring device for measuring an output signal of the strain gauge,
The distance adjusting mechanism has one end connected to the second fixing member, a slide shaft capable of moving back and forth in parallel with the fixed shaft, a projecting portion, and a micro capable of moving the projecting portion back and forth by a desired width. A meter and a spring member that applies a tensile force toward the micrometer to the slide shaft, and maintains the state in which the other end of the slide shaft and the protruding portion are in contact with each other;
The strain gauge is a high-temperature strain gauge used at high temperatures,
The fixed shaft, the first fixing member, the second fixing member, and the slide shaft are made of ceramics or SUS,
The strain gauge calibration system, wherein the fixed shaft and the slide shaft have heat radiation fins . 所定の直線方向に相対的に変位可能な一対の測定部材間の相対変位量に応じた信号を出力する歪計の出力信号と前記相対変位量との関係を測定する際に、前記歪計の一対の測定部材間の間隔を所望の間隔に調整するための校正装置であって、
前記所定の直線方向に延びる長尺の固定シャフトと、
前記固定シャフトの一端に固定され、前記一対の測定部材の何れか一方を固定可能な第１の固定部材と、
前記固定シャフトに沿って移動可能であり、前記一対の測定部材の他方を固定可能な第２の固定部材と、
前記第１の固定部材と前記第２の固定部材との相対変位量を所望の値に調整可能な間隔調整機構とを備え、
前記間隔調整機構は、前記第２の固定部材に一端が接続され、前記固定シャフトと平行に進退可能なスライドシャフトと、突出部と、当該突出部を所望の幅、進退させることが可能なマイクロメータと、前記スライドシャフトに前記マイクロメータに向かう引張力を加え、前記スライドシャフトの他端と前記突出部とが当接した状態を保つばね部材とからなり、
前記歪計は、高温下で使用される高温歪計であり、
前記固定シャフト、前記第１の固定部材、前記第２の固定部材、及び前記スライドシャフトは、セラミックス又はＳＵＳ製であり、
前記固定シャフト及び前記スライドシャフトは放熱フィンを有することを特徴とする歪計校正装置。 When measuring the relationship between the relative displacement amount and the output signal of a strain gauge that outputs a signal corresponding to the relative displacement amount between a pair of measurement members that can be relatively displaced in a predetermined linear direction, A calibration device for adjusting a distance between a pair of measurement members to a desired distance,
An elongated fixed shaft extending in the predetermined linear direction;
A first fixing member fixed to one end of the fixed shaft and capable of fixing either one of the pair of measurement members;
A second fixing member movable along the fixed shaft and capable of fixing the other of the pair of measurement members;
An interval adjusting mechanism capable of adjusting a relative displacement amount between the first fixing member and the second fixing member to a desired value;
The distance adjusting mechanism has one end connected to the second fixing member, a slide shaft capable of moving back and forth in parallel with the fixed shaft, a projecting portion, and a micro capable of moving the projecting portion back and forth by a desired width. A meter and a spring member that applies a tensile force toward the micrometer to the slide shaft, and maintains the state in which the other end of the slide shaft and the protruding portion are in contact with each other;
The strain gauge is a high-temperature strain gauge used at high temperatures,
The fixed shaft, the first fixing member, the second fixing member, and the slide shaft are made of ceramics or SUS,
The strain gauge calibration apparatus, wherein the fixed shaft and the slide shaft have heat radiation fins . 所定の直線方向に相対的に変位可能な一対の測定部材間の相対変位量に応じた信号を出力する歪計の出力信号と前記相対変位量との関係を測定する歪計の校正方法であって、
前記所定の直線方向に延びる長尺の固定シャフトと、
前記固定シャフトの一端に固定され、前記一対の測定部材の何れか一方を固定可能な第１の固定部材と、
前記固定シャフトに沿って移動可能であり、前記一対の測定部材の他方を固定可能な第２の固定部材と、
前記第１の固定部材と前記第２の固定部材との相対変位量を所望の値に調整可能な間隔調整機構とを備え、
前記間隔調整機構は、前記第２の固定部材に一端が接続され、前記固定シャフトと平行に進退可能なスライドシャフトと、突出部と、当該突出部を所望の幅、進退させることが可能なマイクロメータと、前記スライドシャフトに前記マイクロメータに向かう引張力を加え、前記スライドシャフトの他端と前記突出部とが当接した状態を保つばね部材とからなり、
前記歪計は、高温下で使用される高温歪計であり、
前記固定シャフト、前記第１の固定部材、前記第２の固定部材、及び前記スライドシャフトは、セラミックス又はＳＵＳ製であり、
前記固定シャフト及び前記スライドシャフトは放熱フィンを有する歪計校正装置を用い、
前記間隔調整機構により前記第１の固定部材と前記第２の固定部材との相対変位量を変化させて、複数の相対変位位置における前記歪計の出力信号を測定し、測定した前記出力信号に基づき、前記歪計の出力信号と前記一対の測定部材の相対変位量との関係を求めることを特徴とする歪計の校正方法。 A strain gauge calibration method for measuring a relationship between an output signal of a strain gauge that outputs a signal corresponding to a relative displacement amount between a pair of measurement members that can be relatively displaced in a predetermined linear direction and the relative displacement amount. And
An elongated fixed shaft extending in the predetermined linear direction;
A first fixing member fixed to one end of the fixed shaft and capable of fixing either one of the pair of measurement members;
A second fixing member movable along the fixed shaft and capable of fixing the other of the pair of measurement members;
An interval adjusting mechanism capable of adjusting a relative displacement amount between the first fixing member and the second fixing member to a desired value ;
The distance adjusting mechanism has one end connected to the second fixing member, a slide shaft capable of moving back and forth in parallel with the fixed shaft, a projecting portion, and a micro capable of moving the projecting portion back and forth by a desired width. A meter and a spring member that applies a tensile force toward the micrometer to the slide shaft, and maintains the state in which the other end of the slide shaft and the protruding portion are in contact with each other;
The strain gauge is a high-temperature strain gauge used at high temperatures,
The fixed shaft, the first fixing member, the second fixing member, and the slide shaft are made of ceramics or SUS,
The fixed shaft and the slide shaft use a strain gauge calibration device having a radiation fin ,
By changing the relative displacement amount of the first fixing member and the second fixing member by the interval adjusting mechanism, the output signal of the strain gauge at a plurality of relative displacement positions is measured, and the measured output signal A strain gauge calibration method characterized in that a relationship between an output signal of the strain gauge and a relative displacement amount of the pair of measurement members is obtained.
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