JPH04210B2 - - Google Patents
Info
- Publication number
- JPH04210B2 JPH04210B2 JP9867284A JP9867284A JPH04210B2 JP H04210 B2 JPH04210 B2 JP H04210B2 JP 9867284 A JP9867284 A JP 9867284A JP 9867284 A JP9867284 A JP 9867284A JP H04210 B2 JPH04210 B2 JP H04210B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic anisotropy
- rail
- excitation
- detection
- magnetic
- 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.)
- Expired - Lifetime
Links
- 230000005291 magnetic effect Effects 0.000 claims description 61
- 238000001514 detection method Methods 0.000 claims description 40
- 230000005284 excitation Effects 0.000 claims description 27
- 239000011162 core material Substances 0.000 description 14
- 238000010586 diagram Methods 0.000 description 7
- 230000004907 flux Effects 0.000 description 5
- 230000005415 magnetization Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000696 magnetic material Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010291 electrical method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/02—Rotary-transmission dynamometers
- G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
- G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
- G01L3/101—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means
- G01L3/102—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means involving magnetostrictive means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/12—Measuring force or stress, in general by measuring variations in the magnetic properties of materials resulting from the application of stress
- G01L1/125—Measuring force or stress, in general by measuring variations in the magnetic properties of materials resulting from the application of stress by using magnetostrictive means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/12—Measuring force or stress, in general by measuring variations in the magnetic properties of materials resulting from the application of stress
- G01L1/127—Measuring force or stress, in general by measuring variations in the magnetic properties of materials resulting from the application of stress by using inductive means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/02—Rotary-transmission dynamometers
- G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
- G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
- G01L3/101—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means
- G01L3/105—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means involving inductive means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Measuring Magnetic Variables (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は外乱磁界や増幅器の飽和に影響されず
に測定できるようにしたレール軸力測定装置に関
する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a rail axial force measuring device capable of measuring without being affected by a disturbance magnetic field or amplifier saturation.
近年、鋼財中の応力を非破壊で測定する方法と
して、磁気異方性センサを用いることが提案され
ている。（例えば、S.Abuku：Japanese Journal
of Applied Physics，vol.16、No.７、1977、
p1161.）予め良く消磁した試料について、比較的
弱い励磁用磁界を発生する磁気異方性センサを用
いて、一定の交流磁界で励振したときに検出コイ
ルに出力される電圧は、応力が大きいほど大きく
なり、圧縮応力と引張応力では、励振する交流に
同期させて整流した出力電力の向きが逆になる。
（柏谷ほか３名、電気学会、マグネテイツクス研
究会試料MAG−83−87、1983年９月10日）
磁気異方性センサには、例えば、第１図に基本
構造を示す（山田 一他２名、電気学会論文誌
Ｂ：昭和55年４月197〜203頁）ようなものがあ
る。これは磁気異方性センサと呼ばれるもので、
倒立したＵ字形の励振コア１と検出コア２は、そ
れぞれ直交した内面に配置されそれぞれ、脚部に
１対の励振コイル３、検出コイル４が捲かれてい
る。これらのコア材料としては、測定対象磁性材
料すなわち通常の鋼材より遥かに透磁率の高いパ
ーマロイなどを用いる。これを測定対象磁性材料
の上に置いたとき、もし其の材料に磁気異方性が
存在しないか、又は励振コアの面内に磁化容易軸
が存在する場合は励振コイルによる磁束は第２図
ａに示すようになり、検出コイルには出力が現れ
ない。但し、１−１，１−２は励振コアの脚、２
−１，２−２は検出コアの脚である。しかし、測
定対象磁性材料に磁気異方性が存在し、磁化容易
軸が第２図ｂに矢印Ａで示す方向になつている
と、励振コイルによる磁束は第２図ｂに示すよう
になり、検出コイルに出力が現れる。第２図ａに
示す状態は、公知のブリツジ回路の各辺抵抗が平
衡している場合に対応し、第２図ｂに示す場合は
脚１−１と２−１の間、および脚１−２と２−２
の間の辺の抵抗が小さい場合に対応するものとし
て扱うことが出来る。第３図は此の対応するブリ
ツジ回路を示し、矢印Ａが過る辺６−１と６−２
の抵抗は小さく、辺３−６，３−４の抵抗は大き
く、検出器７に出力が現れている。
In recent years, the use of magnetic anisotropy sensors has been proposed as a method for non-destructively measuring stress in steel goods. (For example, S.Abuku: Japanese Journal
of Applied Physics, vol.16, No.7, 1977,
p1161.) When a sample that has been well demagnetized in advance is excited with a constant alternating magnetic field using a magnetic anisotropy sensor that generates a relatively weak excitation magnetic field, the voltage output to the detection coil increases as the stress increases. The direction of output power rectified in synchronization with the excited alternating current becomes opposite for compressive stress and tensile stress.
(Kashiwaya et al., IEEJ, Magnetics Research Group Sample MAG-83-87, September 10, 1983) For example, the basic structure of a magnetic anisotropy sensor is shown in Figure 1 (Yamada Hajime et al. 2 authors, Transactions of the Institute of Electrical Engineers of Japan B: April 1980, pp. 197-203). This is called a magnetic anisotropy sensor.
An inverted U-shaped excitation core 1 and detection core 2 are arranged on inner surfaces that are perpendicular to each other, and each has a pair of excitation coil 3 and a detection coil 4 wound around its legs. As these core materials, permalloy or the like is used, which has a much higher magnetic permeability than the magnetic material to be measured, that is, ordinary steel. When this is placed on the magnetic material to be measured, if the material does not have magnetic anisotropy or if there is an axis of easy magnetization in the plane of the excitation core, the magnetic flux due to the excitation coil will be as shown in Figure 2. As shown in a, no output appears in the detection coil. However, 1-1 and 1-2 are the legs of the excitation core, and 2
-1 and 2-2 are the legs of the detection core. However, if the magnetic material to be measured has magnetic anisotropy and the axis of easy magnetization is in the direction shown by arrow A in Figure 2b, the magnetic flux due to the excitation coil will be as shown in Figure 2b, Output appears on the detection coil. The state shown in FIG. 2a corresponds to the case where the resistances on each side of the known bridge circuit are balanced, and in the case shown in FIG. 2 and 2-2
It can be treated as corresponding to the case where the resistance of the side between is small. Figure 3 shows this corresponding bridge circuit, with the sides 6-1 and 6-2 crossed by arrow A.
The resistance on the sides 3-6 and 3-4 is small, and the resistance on the sides 3-6 and 3-4 is large, and an output appears on the detector 7.
いま第４図に示すように、敷設されたレール９
の軸力を測定するために、磁気異方性センサ８を
レール９に設置したとする。レール９には、列車
駆動用や信号用の電流を合成した電流１０が流れ
ており、その結果、右ねじの法則に従つた磁界１
１が生じている。この磁界１１により、第５図に
示すように、励磁コア１に磁束１１−１、検出コ
ア２中に磁束１１−２が生じ、検出コイル出力は
大きく、増幅器のダイナミツクレンジを越え飽和
させる。この磁界１１は、レールに流れる電流に
よつて生じた磁界であつて、レールの軸方向とは
直交しており、レール中の応力を測定するため
に、磁気異方性センサで励振している励振磁界と
は全く別な、外乱磁界である。 As shown in Fig. 4, the laid rail 9
Assume that the magnetic anisotropy sensor 8 is installed on the rail 9 in order to measure the axial force of the rail 9. A current 10 that is a combination of train drive and signal currents flows through the rail 9, and as a result, a magnetic field 1 that follows the right-handed screw rule is generated.
1 is occurring. As shown in FIG. 5, this magnetic field 11 generates a magnetic flux 11-1 in the excitation core 1 and a magnetic flux 11-2 in the detection core 2, and the output of the detection coil is large and exceeds the dynamic range of the amplifier and is saturated. This magnetic field 11 is a magnetic field generated by a current flowing through the rail, is perpendicular to the axial direction of the rail, and is excited by a magnetic anisotropy sensor in order to measure the stress in the rail. This is a disturbance magnetic field that is completely different from the excitation magnetic field.
第６図は、レール９に流れる電流１０の方向、
この電流によつて生ずる磁界１１の方向と、励振
コイル１、検出コイル２の方向を示す。第６図ａ
は、検出コイル２が外乱磁界１１の影響を最も受
け易い状態を示し、同図ｂは最も影響を受けにく
い状態を示す。 FIG. 6 shows the direction of the current 10 flowing through the rail 9,
The direction of the magnetic field 11 generated by this current and the directions of the excitation coil 1 and detection coil 2 are shown. Figure 6a
2 shows a state in which the detection coil 2 is most susceptible to the influence of the disturbance magnetic field 11, and b in the figure shows a state in which it is least affected.
第１図に示した磁気異方性センサは、通常、測
定対象に対して励磁コイルと検出コイルよりなる
コイル系全体を回転できるようになつている。第
７図は、検出コイルが外乱磁界による出力を生じ
ない位置すなわち第６図ｂの位置を角度θ＝０の
始点とし、θを０〜360度回転した場合のθと検
出コイル出力V0の関係を示す図で、１３は検出
コイル出力、１４は増幅出力を示し、検出コイル
が外乱磁界の影響を受けて、怱ち増幅器が飽和し
てしまう状況が判る。 In the magnetic anisotropy sensor shown in FIG. 1, the entire coil system consisting of an excitation coil and a detection coil can be rotated with respect to the object to be measured. Figure 7 shows the relationship between θ and the detection coil output V 0 when θ is rotated from 0 to 360 degrees, with the position where the detection coil does not produce an output due to the disturbance magnetic field, that is, the position in Figure 6 b, as the starting point of angle θ = 0 . In the diagram showing the relationship, 13 indicates the detection coil output, and 14 indicates the amplification output, and it can be seen that the detection coil is affected by a disturbance magnetic field and the amplifier becomes saturated.
レール軸力を磁気異方性センサで測定する際に
は、レール軸力を最も検出し易い角度、励振コイ
ル、検出コアの面が夫々レールとほど45度をなす
ように配置する。第７図は、検出コイルの面をレ
ールに対して45度をなすように配置した場合到
底、レール軸方向の応力による磁化容易軸の存在
や磁化の容易さの程度などを検出できる状況では
ないことを示している。 When measuring rail axial force with a magnetic anisotropy sensor, the angle at which the rail axial force can be most easily detected is arranged so that the excitation coil and detection core surfaces form a 45 degree angle with the rail. Figure 7 shows that when the surface of the detection coil is placed at a 45 degree angle to the rail, it is impossible to detect the presence of an axis of easy magnetization due to stress in the rail axis direction or the degree of ease of magnetization. It is shown that.
本発明の目的は、実際の測定に際して外乱磁界
の影響を受けずに、磁気異方性センサを用いてレ
ールの軸方向応力を測定できるようにした装置を
提供することにある。
An object of the present invention is to provide an apparatus that can measure the axial stress of a rail using a magnetic anisotropy sensor without being affected by a disturbance magnetic field during actual measurement.
上記の目的を達成するために本発明においては
夫々レール表面に略直交し、かつ互いに直交して
レールと夫々略45度をなす２平面内に脚部をレー
ル表面に接して配置した倒立Ｕ字形のコアに、そ
れぞれコイルを捲き、一方を磁気異方性検出用、
他方を励振用とした磁気異方性センサを、２組隣
接して配設し、これら２組の磁気異方性のセンサ
を、磁気異方性検出用コア面同士、励磁用コア面
同士を夫々平行させ、磁気異方性検出用コイル同
士を差動接続して外乱磁界が２個の検出用コイル
に及ぼす影響を相殺させ、また２個の励振用コイ
ルを夫々逆相で励振して、差動接続した２個の検
出コイル夫々が、レール軸力に対応した出力が得
られるようにした。検出用コイルが差動接続さ
れ、励振用コイルが逆相に励振するから、検出用
コイルの出力は同相となり、加え合わされること
になる。
In order to achieve the above object, the present invention has an inverted U-shape in which the legs are arranged in contact with the rail surface in two planes, each of which is substantially orthogonal to the rail surface and which is orthogonal to each other and forms an angle of about 45 degrees with the rail. A coil is wound around each core, one for magnetic anisotropy detection, and one for magnetic anisotropy detection.
Two sets of magnetic anisotropy sensors, the other for excitation, are arranged adjacently, and these two sets of magnetic anisotropy sensors are arranged so that the core surfaces for magnetic anisotropy detection are connected to each other, and the core surfaces for excitation are connected to each other. The magnetic anisotropy detection coils are connected in a differential manner to cancel out the influence of the disturbance magnetic field on the two detection coils, and the two excitation coils are excited in opposite phases. Each of the two differentially connected detection coils is configured to provide an output corresponding to the rail axial force. Since the detection coils are differentially connected and the excitation coils excite in opposite phases, the outputs of the detection coils are in phase and added together.
なお、磁気異方性センサによるレール軸力測定
に際しては、前記の如く種々の電流が流されてい
たり、また例えばレールが地球磁場の影響を受け
易い方向に敷設されていたりして、レールが特定
方向に磁化されている場合が多いから測定作業に
先立つて、あらかじめ、漸次低減する交流磁界に
よつて消磁を行つておくものとする。 When measuring rail axial force using a magnetic anisotropy sensor, it is important to note that as mentioned above, various currents may be flowing, or the rail may be laid in a direction that is susceptible to the effects of the earth's magnetic field. Since the magnet is often magnetized in one direction, it must be demagnetized by a gradually decreasing alternating current magnetic field prior to measurement.
第８図は本発明一実施例の要部概略接続図であ
る。一方のセンサ１５−１の検出コイル１７−
１，１７−２は和動接続され１個のコイルとみな
せる。他方のセンサ１５−２の検出コイル１９−
１，１９−２も同様である。今センサ１５−１と
１５−２をレールに対し等しい角度で設置したと
き、検出コイル１７−１と１７−２、および１９
−１と１９−２に誘起される外乱磁束による電圧
は等しくなり、検出コイル１７−１，１７−２と
１９−１，１９−２が差動接続してあると相殺さ
れ出力端子１２に出力は現れない。しかし、この
ままでは、励振コイル１６−１，１６−２と１８
−１，１８−２から誘起される本来の信号まで相
殺してしまうため、励振コイル１８−１，１８−
２を逆相になる様に接続すると、検出コイル１９
−１，１９−２に誘起される信号電圧は逆相とな
り、これらの検出コイルは検出コイル１７−１，
１７−２とは差動接続されているため信号は和と
なり２倍となる。このようにして、磁気異方性セ
ンサ自体の励振コイルによるレール磁化の程度の
検出信号は２倍となり、外乱は相殺され本来の信
号を確実に検出できる。この方法を採用すること
により、外乱はセンサ１５−１，１５−２に対し
て等しければ良く、その方向、強さなどは無関係
となる。また、センサ１５−２を無励振で使用す
ると外乱の相殺は可能であるが、出力信号はセン
サ１個のときと等しくなる。なお、測定に先立つ
て、レールと同一材質の試料について、十分、応
力と出力電圧の関係を測定、較正しておくことが
望ましい。
FIG. 8 is a schematic connection diagram of main parts of an embodiment of the present invention. Detection coil 17- of one sensor 15-1
1 and 17-2 are harmonically connected and can be regarded as one coil. Detection coil 19- of the other sensor 15-2
The same applies to 1 and 19-2. Now, when sensors 15-1 and 15-2 are installed at equal angles to the rail, detection coils 17-1 and 17-2, and 19
The voltages due to the disturbance magnetic flux induced in -1 and 19-2 become equal, and if the detection coils 17-1, 17-2 and 19-1, 19-2 are differentially connected, they are canceled and output to the output terminal 12. does not appear. However, as it is, the excitation coils 16-1, 16-2 and 18
-1, 18-2, the original signals induced from the excitation coils 18-1, 18-2 are canceled out.
2 are connected in reverse phase, the detection coil 19
The signal voltages induced in -1 and 19-2 have opposite phases, and these detection coils are connected to detection coils 17-1 and 17-1.
Since it is differentially connected to 17-2, the signal is summed and doubled. In this way, the detection signal of the degree of rail magnetization by the excitation coil of the magnetic anisotropy sensor itself is doubled, disturbances are canceled out, and the original signal can be reliably detected. By employing this method, the disturbance only needs to be equal to the sensors 15-1 and 15-2, and its direction, strength, etc. are irrelevant. Further, if the sensor 15-2 is used without excitation, disturbances can be canceled out, but the output signal will be the same as when using only one sensor. Note that, prior to measurement, it is desirable to sufficiently measure and calibrate the relationship between stress and output voltage using a sample made of the same material as the rail.
なお、上述した動作を純電気的方法で実現する
ことも可能であり、これを第９図に示す。センサ
１５により検出された信号と外乱の和の電圧は、
増幅器２０で増幅され、復調器２１で直流電圧に
直される。これをサンプルホールド２３−１に保
持する。次にスイツチ２２を反対に倒し、無励振
状態とし、外乱電圧のみを同様にサンプルホール
ド２３−２で保持し、差動増幅器２４で差をと
り、本来の信号だけを出力させることができる。
しかし、復調する以前に飽和してしまう（実際に
よく生ずる）ような場合には使用できないという
難点がある。 Note that it is also possible to realize the above-mentioned operation by a purely electrical method, which is shown in FIG. The voltage of the sum of the signal detected by the sensor 15 and the disturbance is:
The signal is amplified by an amplifier 20 and converted to a DC voltage by a demodulator 21. This is held in the sample hold 23-1. Next, the switch 22 is turned in the opposite direction to create a non-excitation state, and only the disturbance voltage is similarly held in the sample hold 23-2, the difference is taken by the differential amplifier 24, and only the original signal can be output.
However, it has the disadvantage that it cannot be used in cases where saturation occurs before demodulation (which often occurs).
以上説明したように本発明によれば、外乱や増
幅器の飽和などに妨げられずに、磁気異方性検出
装置によりレール軸方向応力を測定することが出
来る。
As explained above, according to the present invention, the rail axial stress can be measured by the magnetic anisotropy detection device without being hindered by disturbances, amplifier saturation, or the like.
第１図は磁気異方性クロスセンサの基本構造を
示す図、第２図ａ，ｂは磁気異方性センサの作動
原理説明図、第３図は磁気異方性センサに対応す
るブリツジ回路の図、第４図は磁気異方性センサ
によるレール軸力測定状態およびその際の外乱の
説明図、第５図、第６図ａ，ｂ、第７図は外乱の
原因、影響の説明図、第８図は本発明の一実施例
の要部概略接続図、第９図は磁気異方性センサを
用い純電気的に外乱の影響を除去してレール軸力
を測定する回路例を示す図である。
１……励振コア、２……検出コア、３……励振
コイル、４……検出コイル、９……レール、１０
……レールに流れる電流、１１……外乱磁界、１
５−１……一方の磁気異方性センサ、１５−２…
…他方の磁気異方性センサ、１６−１，１６−
２，１８−１，１８−２……励振コイル、１７−
１，１７−２，１９−１，１９−２……検出コイ
ル。
Fig. 1 shows the basic structure of the magnetic anisotropic cross sensor, Fig. 2 a and b are diagrams explaining the operating principle of the magnetic anisotropic sensor, and Fig. 3 shows the bridge circuit corresponding to the magnetic anisotropic sensor. Figure 4 is an explanatory diagram of the rail axial force measurement state by the magnetic anisotropy sensor and the disturbance at that time, Figures 5, 6 a, b, and 7 are explanatory diagrams of the causes and effects of the disturbance, Fig. 8 is a schematic connection diagram of the main parts of an embodiment of the present invention, and Fig. 9 is a diagram showing an example of a circuit that uses a magnetic anisotropy sensor to remove the influence of disturbance purely electrically and measure the rail axial force. It is. 1...Excitation core, 2...Detection core, 3...Excitation coil, 4...Detection coil, 9...Rail, 10
... Current flowing in the rail, 11 ... Disturbing magnetic field, 1
5-1...One magnetic anisotropy sensor, 15-2...
...The other magnetic anisotropy sensor, 16-1, 16-
2,18-1,18-2...excitation coil, 17-
1, 17-2, 19-1, 19-2...Detection coil.
Claims (1)
する２平面内に脚部をレール表面に接して配置し
た倒立Ｕ字形のコアに、それぞれコイルを捲い
て、一方を磁気異方性検出用、他方を励振用とし
た磁気異方性センサを、２組隣接して配設し、こ
れら２組の磁気異方性センサの、磁気異方性検出
用コア面同士、励磁用コア面同士を夫々平行さ
せ、磁気異方性検出用コイル同士を差動接続、励
振用コイル同士を逆相励振し、レール軸力に対応
した磁気異方性がレールに生じていることを利用
して、前記差動接続した磁気異方性検出用コイル
の出力により外乱磁界の影響を除去したレール軸
力を測定するようにしたことを特徴とするレール
軸力測定装置。1 Each coil is wound around an inverted U-shaped core whose legs are arranged in contact with the rail surface in two planes that are substantially perpendicular to the rail surface and mutually orthogonal, one for detecting magnetic anisotropy and the other for detecting magnetic anisotropy. Two sets of magnetic anisotropy sensors for excitation are arranged adjacently, and the core surfaces for magnetic anisotropy detection of these two sets of magnetic anisotropy sensors are parallel to each other, and the core surfaces for excitation are parallel to each other. The magnetic anisotropy detection coils are connected differentially, the excitation coils are excited in opposite phases, and the magnetic anisotropy corresponding to the rail axial force is generated in the rail. A rail axial force measuring device characterized in that the rail axial force is measured with the influence of a disturbance magnetic field removed by the output of a connected magnetic anisotropy detection coil.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9867284A JPS60243526A (en) | 1984-05-18 | 1984-05-18 | Apparatus for measuring axial force of rail |
| FR8503386A FR2564585B1 (en) | 1984-05-18 | 1985-03-07 | APPARATUS FOR MEASURING A CONSTRAINT BY ELECTROMAGNETIC PROCESS |
| DE19853508337 DE3508337A1 (en) | 1984-05-18 | 1985-03-08 | Device for the electromagnetic measurement of a load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9867284A JPS60243526A (en) | 1984-05-18 | 1984-05-18 | Apparatus for measuring axial force of rail |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60243526A JPS60243526A (en) | 1985-12-03 |
| JPH04210B2 true JPH04210B2 (en) | 1992-01-06 |
Family
ID=14226003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9867284A Granted JPS60243526A (en) | 1984-05-18 | 1984-05-18 | Apparatus for measuring axial force of rail |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS60243526A (en) |
| DE (1) | DE3508337A1 (en) |
| FR (1) | FR2564585B1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62140333U (en) * | 1986-02-24 | 1987-09-04 | ||
| DE3887853T2 (en) * | 1987-12-28 | 1994-05-19 | Kubota Ltd | Torque measuring device. |
| JPH076950B2 (en) * | 1988-09-14 | 1995-01-30 | 株式会社日立製作所 | Device and method for detecting deterioration of metallic material |
| DE4014686A1 (en) * | 1989-05-12 | 1990-11-15 | Preussag Ag | Head measuring changes in magnetic properties due to mechanical stress - has coil carrying arms of iron core with common back plate |
| JP2849038B2 (en) * | 1994-04-08 | 1999-01-20 | 新日本製鐵株式会社 | Rail axial force measurement method and rail that can measure axial force |
| NL1028698C2 (en) * | 2005-01-26 | 2006-07-31 | Grontmij Nederland B V | System and method for at least detecting a mechanical stress in at least a part of a rail. |
| EP2862778B1 (en) * | 2013-10-15 | 2017-01-04 | Bayern Engineering GmbH & Co. KG | Method for generating measurement results from sensor signals |
| EP3051265B1 (en) * | 2015-01-29 | 2017-10-11 | Torque and More (TAM) GmbH | Force measurement device |
| DE102016205784A1 (en) | 2016-04-07 | 2017-10-12 | Robert Bosch Gmbh | Torque detecting device and vehicle |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1201642B (en) * | 1963-03-05 | 1965-09-23 | Elveco L Van Den Eynde & Cie E | Transmission with a single drive unit and with several gear ratios |
| DE1220634B (en) * | 1964-09-24 | 1966-07-07 | Schwingungstechnik Veb | Magnetoelastic force measuring device |
| US3535625A (en) * | 1968-04-22 | 1970-10-20 | Garrett Corp | Strain and flaw detector |
| BE760080A (en) * | 1969-12-10 | 1971-05-17 | Jones & Laughlin Steel Corp | METHOD AND APPARATUS FOR MEASURING STRESSES IN A FERROMAGNETIC MATERIAL |
| SE385406B (en) * | 1974-10-25 | 1976-06-28 | Asea Ab | PROCEDURE FOR MANUFACTURING A MAGNETOELASTIC SENSOR |
| DE3031997C2 (en) * | 1980-08-25 | 1986-01-16 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Arrangement for non-contact measurement of static and dynamic torques |
-
1984
- 1984-05-18 JP JP9867284A patent/JPS60243526A/en active Granted
-
1985
- 1985-03-07 FR FR8503386A patent/FR2564585B1/en not_active Expired
- 1985-03-08 DE DE19853508337 patent/DE3508337A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| FR2564585A1 (en) | 1985-11-22 |
| JPS60243526A (en) | 1985-12-03 |
| DE3508337A1 (en) | 1985-11-21 |
| FR2564585B1 (en) | 1988-09-23 |
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