JP2017083328A - Strain sensor - Google Patents
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Abstract
Description
本発明は、橋梁などの建造物の表面歪計測に使用する歪センサに関する。 The present invention relates to a strain sensor used for measuring the surface strain of a building such as a bridge.
被測定物のひずみを測定する歪センサがある。歪センサは、絶縁性を有する薄いベース上に金属箔等の抵抗体が形成された歪ゲージを備える。抵抗体には、歪ゲージから出力値を取り出すリード線が接続する。歪ゲージは、被測定物に取り付けられる。抵抗体は、被測定物のひずみに応じてひずみ、抵抗値が変化する。従って、歪ゲージの出力値に基づいて被測定物のひずみ量を測定できる。 There is a strain sensor that measures the strain of an object to be measured. The strain sensor includes a strain gauge in which a resistor such as a metal foil is formed on a thin base having insulating properties. A lead wire for extracting an output value from the strain gauge is connected to the resistor. The strain gauge is attached to the object to be measured. The resistor changes in strain and resistance according to the strain of the object to be measured. Therefore, the strain amount of the object to be measured can be measured based on the output value of the strain gauge.
歪センサを用いて橋梁等の被測定物のひずみを測定する場合、歪ゲージを被測定物の表面に接着剤で接着する。そして、耐候性を高めるために、コーティング剤で歪ゲージと、歪ゲージおよびリード線の接続部分とを覆う（非特許文献１参照）。 When measuring the strain of an object to be measured such as a bridge using a strain sensor, a strain gauge is bonded to the surface of the object to be measured with an adhesive. And in order to improve a weather resistance, a strain gauge and the connection part of a strain gauge and a lead wire are covered with a coating agent (refer nonpatent literature 1).
歪ゲージは、例えば長さ数ｃｍ、幅５ｍｍ、厚さ０．１ｍｍ程度であり、小さく薄い。そのため、歪ゲージの接着作業およびコーティング作業は困難であり、歪センサの取り付け作業には手間がかかる。特に、河川橋梁の下面のような足場のない高所や風が強い難所で歪センサの取り付け作業を行う場合、取り付け作業は大変困難である。 The strain gauge is, for example, about several centimeters long, about 5 mm wide, and about 0.1 mm thick, and is small and thin. Therefore, it is difficult to bond and coat the strain gauge, and it takes time to install the strain sensor. In particular, when the strain sensor is attached at a high place where there is no scaffold such as the lower surface of a river bridge or a difficult place where wind is strong, the attachment work is very difficult.
被測定物から漏水が生じる場合がある。被測定物が例えばコンクリートの場合、コンクリートの劣化に伴いコンクリートから漏水が生じたり、遊離石灰が浸出したりする。従来の歪センサでは、被測定物側から漏水等が生じると、歪ゲージが損傷を受けるおそれがある。 Water leakage may occur from the measurement object. If the object to be measured is concrete, for example, water leaks from the concrete or free lime leaches out as the concrete deteriorates. In the conventional strain sensor, when water leaks from the measured object side, the strain gauge may be damaged.
本発明は上記の点に鑑み、現場での被測定物への接着作業が容易で、コーティング作業の必要がなく、長期間のモニタリングにも耐え得る歪センサの提供を目的とする。 The present invention has been made in view of the above points, and an object thereof is to provide a strain sensor that can be easily adhered to an object to be measured in the field, does not require a coating operation, and can withstand long-term monitoring.
一般に、実施形態によれば、歪センサは、歪ゲージと、板状部材と、歪ゲージを接着する手段と、板状部材に接着された歪ゲージを密閉する手段と、を備える。歪ゲージは、伸縮により抵抗値が変化する。板状部材は、被測定対象物と線膨張係数が略同じである。 In general, according to the embodiment, the strain sensor includes a strain gauge, a plate-shaped member, means for bonding the strain gauge, and means for sealing the strain gauge bonded to the plate-shaped member. The resistance value of the strain gauge changes due to expansion and contraction. The plate-like member has substantially the same linear expansion coefficient as the object to be measured.
以下、実施形態について図面を参照しつつ説明する。
図１は、歪センサ１００の分解斜視図である。
歪センサ１００は、橋梁等の被測定物（被測定対象物）に取り付けられる。歪センサ１００は、被測定物のひずみを測定し、測定値をメモリに蓄積する。歪センサ１００は、通信相手局にメモリ内の測定値を無線により送信する。
Hereinafter, embodiments will be described with reference to the drawings.
FIG. 1 is an exploded perspective view of the strain sensor 100.
The strain sensor 100 is attached to an object to be measured (object to be measured) such as a bridge. The strain sensor 100 measures the strain of the object to be measured and stores the measured value in a memory. The strain sensor 100 wirelessly transmits the measured value in the memory to the communication partner station.
歪センサ１００は、板状部材１（板状部）、収容部２、歪ゲージ３、リード線４、処理ユニット５、電池６を備える。 The strain sensor 100 includes a plate-like member 1 (plate-like portion), a housing portion 2, a strain gauge 3, a lead wire 4, a processing unit 5, and a battery 6.
板状部材１は、矩形の板状であり、後述するが、図１の下面が接着剤９２（図２）にて被測定物に接着される。板状部材１は、金属製であり、被測定物と略等しい線膨張係数を有する。板状部材１の材質は、被測定物がコンクリートである場合、ＪＩＳ規格のＳＵＳ４３０であってもよい。 The plate-like member 1 has a rectangular plate shape, and as will be described later, the lower surface of FIG. 1 is bonded to the object to be measured with an adhesive 92 (FIG. 2). The plate-like member 1 is made of metal and has a linear expansion coefficient substantially equal to that of the object to be measured. The material of the plate-like member 1 may be JIS standard SUS430 when the object to be measured is concrete.
板状部材１の外縁部には、外縁部に沿って一周するように切れ目なく連続して弾性接着剤９１が塗布される。板状部材１は、弾性接着剤９１により、収容部２の下面に接着される。弾性接着剤９１は、切れ目なく環状に板状部材１に塗布されるので、収容部２と板状部材１との隙間を塞ぎ、収容部２と板状部材１との間から水分が歪センサ１００の内部に侵入することを防ぐ。 The elastic adhesive 91 is continuously applied to the outer edge portion of the plate-like member 1 without any break so as to make a round along the outer edge portion. The plate-like member 1 is bonded to the lower surface of the housing portion 2 with an elastic adhesive 91. Since the elastic adhesive 91 is applied to the plate-like member 1 in an annular shape without a break, the gap between the accommodating portion 2 and the plate-like member 1 is closed, and moisture is strained between the accommodating portion 2 and the plate-like member 1. Intrusion into the inside of the 100 is prevented.
収容部２は、筐体２１および蓋２２を備える。筐体２１および蓋２２は、金属製であり、被測定物と略等しい線膨張係数を有する。筐体２１および蓋２２の材質は、被測定物がコンクリートである場合、ＪＩＳ規格のＳＵＳ４３０であってもよい。筐体２１および蓋２２の材質は、板状部材１と異なっていてもよい。筐体２１および蓋２２の材質は、互いに異なっていてもよい。 The storage unit 2 includes a housing 21 and a lid 22. The casing 21 and the lid 22 are made of metal and have a linear expansion coefficient substantially equal to that of the device under test. The material of the casing 21 and the lid 22 may be JIS standard SUS430 when the object to be measured is concrete. The material of the housing 21 and the lid 22 may be different from that of the plate-like member 1. The materials of the housing 21 and the lid 22 may be different from each other.
筐体２１は、上部が開口した有底箱状である。筐体２１において、四辺の各側壁部２１１が繋がる各隅部には、取付穴２１２がある。筐体２１において、底部２１３の中央部には、底部２１３を貫通する開口部２１４がある。開口部２１４は、歪ゲージ３の外形より大きい。 The housing | casing 21 is bottomed box shape which the upper part opened. In the case 21, there are attachment holes 212 at each corner where the four side walls 211 are connected. In the housing 21, an opening 214 that penetrates the bottom 213 is provided at the center of the bottom 213. The opening 214 is larger than the outer shape of the strain gauge 3.
蓋２２の四隅には孔２２１がある。取付ネジ８が各孔２２１を介して各取付穴２１２に嵌められることにより、蓋２２が筐体２１に取り付けられる。筐体２１および蓋２２は、板状部材１と共に、歪ゲージ３、リード線４、処理ユニット５、および電池６を内部に密閉する。従って、板状部材１に接着された歪ゲージ３を密閉する手段が、板状部材１、弾性接着剤９１、および収容部２を備えて構成されている。歪ゲージ３を接着した板状部材１が、歪ゲージ３を密閉する手段の構成部材の一部を成している。 There are holes 221 at the four corners of the lid 22. The cover 22 is attached to the housing 21 by fitting the attachment screw 8 into each attachment hole 212 through each hole 221. The casing 21 and the lid 22 seal the strain gauge 3, the lead wire 4, the processing unit 5, and the battery 6 together with the plate-like member 1. Therefore, a means for sealing the strain gauge 3 bonded to the plate-like member 1 includes the plate-like member 1, the elastic adhesive 91, and the accommodating portion 2. The plate-like member 1 to which the strain gauge 3 is bonded constitutes a part of the constituent member of the means for sealing the strain gauge 3.
歪ゲージ３は、板状部材１上において、開口部２１４内に収まる位置に接着剤（歪ゲージ３を接着する手段）によって接着される。歪ゲージ３は、ベース３１と抵抗体３２とを備える。歪ゲージ３として、被測定物に合わせて温度特性が設計されているものが用いられる。 The strain gauge 3 is bonded on the plate-like member 1 by an adhesive (means for bonding the strain gauge 3) at a position that fits in the opening 214. The strain gauge 3 includes a base 31 and a resistor 32. As the strain gauge 3, one having a temperature characteristic designed according to the object to be measured is used.
ベース３１は、絶縁性を有する素材からなり、フィルム状である。ベース３１は、接着剤により板状部材１上に接着される。 The base 31 is made of an insulating material and has a film shape. The base 31 is bonded onto the plate member 1 with an adhesive.
抵抗体３２は、例えば金属箔である。抵抗体３２は、ベース３１上にあり、被測定物のひずみに応じて伸縮し、抵抗値が変化する。 The resistor 32 is, for example, a metal foil. The resistor 32 is on the base 31 and expands and contracts according to the strain of the object to be measured, and the resistance value changes.
リード線４は、２本ある。各リード線４の一端は、抵抗体３２の両端にそれぞれ接続する。リード線４の他端は、処理ユニット５に接続する。リード線４は、歪ゲージ３の出力を処理ユニット５に伝達する。 There are two lead wires 4. One end of each lead wire 4 is connected to both ends of the resistor 32. The other end of the lead wire 4 is connected to the processing unit 5. The lead wire 4 transmits the output of the strain gauge 3 to the processing unit 5.
処理ユニット５は、歪ゲージ３の出力信号に対し、ひずみ測定に好適な信号となるように増幅等の処理を行う。処理ユニット５については後述する。
電池６は、処理ユニット５に電力を供給する。
The processing unit 5 performs processing such as amplification on the output signal of the strain gauge 3 so as to be a signal suitable for strain measurement. The processing unit 5 will be described later.
The battery 6 supplies power to the processing unit 5.
以下、歪ゲージ３を板状部材１へ接着する手順を説明する。
まず、板状部材１を、筐体２１の下面に弾性接着剤９１によって接着する。
続いて、弾性接着剤９１を完全に硬化させる。
そして、板状部材１において、開口部２１４から露出する部分に歪ゲージ３を接着剤によって接着する。
Hereinafter, a procedure for bonding the strain gauge 3 to the plate-like member 1 will be described.
First, the plate-like member 1 is bonded to the lower surface of the housing 21 with the elastic adhesive 91.
Subsequently, the elastic adhesive 91 is completely cured.
In the plate-like member 1, the strain gauge 3 is bonded to the portion exposed from the opening 214 with an adhesive.
本実施形態では、板状部材１を筐体２１に接着することにより、板状部材１の初期歪を矯正でき、板状部材１の平坦度を改善できる。実施形態では、平坦度を改善した板状部材１に歪ゲージ３を接着するので、歪ゲージ３の出力オフセットを軽減できる。 In the present embodiment, by bonding the plate member 1 to the housing 21, the initial distortion of the plate member 1 can be corrected, and the flatness of the plate member 1 can be improved. In the embodiment, since the strain gauge 3 is bonded to the plate-like member 1 with improved flatness, the output offset of the strain gauge 3 can be reduced.
本実施形態では、歪ゲージ３の出力を、処理ユニット５の高利得のひずみ増幅器５２（図５）で増幅する。本実施形態では、歪ゲージ３の出力オフセットを軽減できるので、ひずみ増幅器５２の出力ダイナミックレンジを確保できる。 In this embodiment, the output of the strain gauge 3 is amplified by the high gain strain amplifier 52 (FIG. 5) of the processing unit 5. In the present embodiment, since the output offset of the strain gauge 3 can be reduced, the output dynamic range of the strain amplifier 52 can be ensured.
本実施形態では、筐体２１に板状部材１を接着し、続いて板状部材１に歪ゲージ３を接着した後、筐体２１内に処理ユニット５および電池６を設置する。そして、蓋２２を筐体２１に取り付けることで、歪センサ１００を組み立てる。なお、処理ユニット５および電池６が設置された筐体２１に、板状部材１を接着してもよい。 In the present embodiment, the plate-like member 1 is bonded to the casing 21, and then the strain gauge 3 is bonded to the plate-shaped member 1, and then the processing unit 5 and the battery 6 are installed in the casing 21. Then, the strain sensor 100 is assembled by attaching the lid 22 to the housing 21. The plate-like member 1 may be bonded to the casing 21 in which the processing unit 5 and the battery 6 are installed.
図２は、被測定物に設置された歪センサ１００の側面図である。
歪センサ１００を使用する際には、板状部材１の下面を接着剤９２により被測定物に接着する。被測定物が橋梁等のコンクリートである場合、接着剤９２としては、多孔性で粗面であるコンクリート表面への接着に適した一般的なコンクリート用接着剤を用いることができる。
FIG. 2 is a side view of the strain sensor 100 installed on the object to be measured.
When using the strain sensor 100, the lower surface of the plate-like member 1 is bonded to the object to be measured by the adhesive 92. When the object to be measured is concrete such as a bridge, a general concrete adhesive suitable for bonding to a porous and rough concrete surface can be used as the adhesive 92.
図３は、弾性接着剤９１の機能を説明するための模式図である。
弾性接着剤９１は、板状部材１の外縁部に沿って環状に塗布される。歪ゲージ３は、環状に塗布される弾性接着剤９１の間に位置する。弾性接着剤９１は、板状部材１の中央部の領域と収容部２との間に隙間Ｃを形成する。
FIG. 3 is a schematic diagram for explaining the function of the elastic adhesive 91.
The elastic adhesive 91 is annularly applied along the outer edge portion of the plate-like member 1. The strain gauge 3 is located between the elastic adhesives 91 applied in an annular shape. The elastic adhesive 91 forms a gap C between the central region of the plate-like member 1 and the accommodating portion 2.
図４は、板状部材１がひずむ様子を示す模式図である。
板状部材１の中央部の領域と収容部２との間に隙間Ｃがあるので、板状部材１の中央部の領域が、被測定物のひずみに追従して収容部２側にひずむことができる。また、弾性接着剤９１が十分な弾性を有し、被測定物のひずみに追従して弾性変形するので、弾性接着剤９１に代えて弾性の低い接着剤を使用する場合に比べ、板状部材１が良好にひずむことができる。これにより、本実施形態では、被測定物の測定精度を良好にできる。
FIG. 4 is a schematic view showing a state where the plate-like member 1 is distorted.
Since there is a gap C between the central region of the plate-like member 1 and the accommodating portion 2, the central portion of the plate-like member 1 is distorted toward the accommodating portion 2 following the strain of the object to be measured. Can do. Further, since the elastic adhesive 91 has sufficient elasticity and elastically deforms following the strain of the object to be measured, it is a plate-like member as compared with the case where an adhesive having low elasticity is used instead of the elastic adhesive 91. 1 can be distorted well. Thereby, in this embodiment, the measurement precision of a to-be-measured object can be made favorable.
図５は、処理ユニット５の構成を示すブロック図である。
処理ユニット５は、ブリッジ回路５１、ひずみ増幅器５２、ＡＤ変換器５３、ＭＣＵ５４（Micro Controller Unit）、無線通信モジュール５５、アンテナ５６、および電圧レギュレータ５７を備える。
FIG. 5 is a block diagram showing the configuration of the processing unit 5.
The processing unit 5 includes a bridge circuit 51, a strain amplifier 52, an AD converter 53, an MCU 54 (Micro Controller Unit), a wireless communication module 55, an antenna 56, and a voltage regulator 57.
歪ゲージ３の抵抗値は、歪ゲージ３の伸縮に応じて概ね１％以下の僅かな変化を示す。歪ゲージ３は、１２０Ω〜１ｋΩの範囲で規格化されている。 The resistance value of the strain gauge 3 shows a slight change of approximately 1% or less depending on the expansion and contraction of the strain gauge 3. The strain gauge 3 is standardized in the range of 120Ω to 1 kΩ.
歪ゲージ３の僅かな抵抗値の変化を十分なＳＮ(Signal to Noise )比でＡＤ(Analogue to Digital) 変換するために、歪ゲージ３は、ホイートストン型のブリッジ回路５１の一辺に置かれている。 The strain gauge 3 is placed on one side of the Wheatstone bridge circuit 51 in order to convert a slight change in the resistance value of the strain gauge 3 into an AD (Analogue to Digital) with a sufficient SN (Signal to Noise) ratio. .
ひずみ増幅器５２は、ブリッジ回路５１の平衡差動出力を４００倍から１０００倍の範囲で増幅する。 The distortion amplifier 52 amplifies the balanced differential output of the bridge circuit 51 in the range of 400 times to 1000 times.
ＡＤ変換器５３は、ひずみ増幅器５２の出力を１２bit以上のデジタル信号に変換する。ひずみ測定の測定値の分解能が１με以上であってもよい場合には、量子化レベルは１２bit以下でもよい。 The AD converter 53 converts the output of the distortion amplifier 52 into a digital signal of 12 bits or more. When the resolution of the measurement value of strain measurement may be 1 με or more, the quantization level may be 12 bits or less.
ＭＣＵ５４は、設定したタイミングでひずみ測定を行い、内蔵するメモリに測定値を蓄積する。なお、ＭＣＵ５４に代えて、プロセッサとメモリとが別体で処理ユニット５内にあってもよい。 The MCU 54 performs strain measurement at the set timing and accumulates the measurement value in a built-in memory. Instead of the MCU 54, the processor and the memory may be provided separately in the processing unit 5.
ＭＣＵ５４は、無線通信モジュール５５およびアンテナ５６を介して通信相手局と通信する。ＭＣＵ５４は、通信相手局からの測定値の送信要求に応じて、メモリに蓄積した測定値を通信相手局に送信する。 The MCU 54 communicates with a communication partner station via the wireless communication module 55 and the antenna 56. The MCU 54 transmits the measurement value stored in the memory to the communication partner station in response to the measurement value transmission request from the communication partner station.
ＭＣＵ５４は、定期的な測定タイミング時や、通信相手局からの測定値の送信要求時には処理ユニット５の各部を動作させ、それ以外の時は処理ユニット５の各部を動作させない。すなわち、ＭＣＵ５４は、処理ユニット５の各部をスリープ動作（間欠動作）させる。ＭＣＵ５４は、電圧レギュレータ５７の出力タイミングを制御することにより、スリープ時における処理ユニット５の各部への電力供給を抑える。 The MCU 54 operates each part of the processing unit 5 at a regular measurement timing or when a measurement value transmission request from the communication partner station is requested, and does not operate each part of the processing unit 5 at other times. That is, the MCU 54 causes each part of the processing unit 5 to perform a sleep operation (intermittent operation). The MCU 54 controls the output timing of the voltage regulator 57 to suppress power supply to each part of the processing unit 5 during sleep.
本実施形態では、歪センサ１００にスリープ期間を設け、歪センサ１００の消費電力を抑える。これにより、本実施形態では、歪センサ１００を、設置現場で長期間動作させることができる。 In the present embodiment, the strain sensor 100 is provided with a sleep period to suppress power consumption of the strain sensor 100. Thereby, in this embodiment, the strain sensor 100 can be operated for a long time at the installation site.
電圧レギュレータ５７は、電池６の電圧出力を安定化させ、歪センサ１００の各部へ電力を供給する。 The voltage regulator 57 stabilizes the voltage output of the battery 6 and supplies power to each part of the strain sensor 100.
（変形例）
図６は、歪センサ１００Ａの分解斜視図である。
本変形例では、前記実施形態の板状部材１が板状部１Ａとなっている。板状部１Ａは、弾性接着剤９１無しに直接筐体２１に繋がる。板状部１Ａは、プレス加工や鋳造等により、筐体２１の側壁部２１１と一体成形されていてもよい。板状部１Ａは、各側壁部２１１の下端に溶接されていてもよい。
(Modification)
FIG. 6 is an exploded perspective view of the strain sensor 100A.
In this modification, the plate-like member 1 of the embodiment is a plate-like portion 1A. The plate-like portion 1A is directly connected to the housing 21 without the elastic adhesive 91. The plate-like portion 1A may be integrally formed with the side wall portion 211 of the housing 21 by pressing or casting. The plate-like portion 1A may be welded to the lower end of each side wall portion 211.
板状部１Ａにおいて、被測定物のひずみに対する追従性を良好にするために、歪ゲージ３が接着される領域の肉厚が薄くなっていてもよい。 In the plate-like portion 1A, the thickness of the region to which the strain gauge 3 is bonded may be thin in order to improve the followability to the strain of the object to be measured.
被測定物を数年単位という長期にわたってモニタリングする場合、被測定物の劣化により被測定物側から漏水が生じることがある。しかし、前記実施形態の歪センサ１００，１００Ａは、歪ゲージ３が板状部材１（板状部１Ａ）および収容部２に密閉されるので、周囲からの防水性に加え、被測定物側からの漏水に対しても防水性を有する。従って、前記実施形態では、歪センサ１００，１００Ａの長期のモニタリングでの使用が可能となる。 When monitoring an object to be measured over a long period of several years, water leakage may occur from the object to be measured due to deterioration of the object to be measured. However, in the strain sensors 100 and 100A of the above embodiment, since the strain gauge 3 is sealed by the plate-like member 1 (plate-like portion 1A) and the accommodating portion 2, in addition to the waterproof property from the surroundings, Waterproof against water leakage. Accordingly, in the embodiment, the strain sensors 100 and 100A can be used for long-term monitoring.
前記実施形態では、歪ゲージ３が板状部材１（板状部１Ａ）および収容部２に密閉されるので、歪センサ１００，１００Ａの設置時に歪ゲージ３のコーティング作業を不要にできる。 In the embodiment, since the strain gauge 3 is sealed by the plate-like member 1 (plate-like portion 1A) and the housing portion 2, the strain gauge 3 can be dispensed with when the strain sensors 100, 100A are installed.
前記実施形態では、歪ゲージ３より大きく剛性も高い歪センサ１００，１００Ａ(板状部材１（板状部１Ａ）および収容部２)を被測定物に接着させる。従って、前記実施形態は、歪ゲージ３を被測定物に接着する従来よりも、歪センサ１００，１００Ａの被測定物への取付作業を容易化できる。 In the embodiment, the strain sensors 100 and 100A (the plate-like member 1 (plate-like portion 1A) and the housing portion 2) that are larger than the strain gauge 3 and have higher rigidity are bonded to the object to be measured. Therefore, the embodiment can facilitate the work of attaching the strain sensors 100 and 100A to the object to be measured, compared to the conventional case where the strain gauge 3 is bonded to the object to be measured.
本発明は、その精神または主要な特徴から逸脱することなく、他の様々な形で実施することができる。そのため、前述の実施の形態はあらゆる点で単なる例示に過ぎず、限定的に解釈してはならない。本発明の範囲は、特許請求の範囲によって示すものであって、明細書本文には、なんら拘束されない。さらに、特許請求の範囲の均等範囲に属する全ての変形、様々な改良、代替および改質は、すべて本発明の範囲内のものである。 The present invention can be implemented in various other forms without departing from the spirit or main features thereof. Therefore, the above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. The scope of the present invention is indicated by the scope of claims, and is not restricted by the text of the specification. Further, all modifications, various improvements, alternatives and modifications belonging to the equivalent scope of the claims are all within the scope of the present invention.
１…板状部、２…収容部、３…歪ゲージ、５…処理ユニット、３１…ベース、３２…抵抗体、９１…接着剤、１００…歪センサ。 DESCRIPTION OF SYMBOLS 1 ... Plate-shaped part, 2 ... Storage part, 3 ... Strain gauge, 5 ... Processing unit, 31 ... Base, 32 ... Resistor, 91 ... Adhesive, 100 ... Strain sensor.
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| JPS4892954U (en) * | 1972-02-07 | 1973-11-07 | ||
| JP2006266683A (en) * | 2005-03-22 | 2006-10-05 | Hitachi Ltd | Mechanical quantity measuring instrument |
| WO2013084294A1 (en) * | 2011-12-06 | 2013-06-13 | 株式会社日立製作所 | Dynamic quantity measuring device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS4892954U (en) * | 1972-02-07 | 1973-11-07 | ||
| JP2006266683A (en) * | 2005-03-22 | 2006-10-05 | Hitachi Ltd | Mechanical quantity measuring instrument |
| WO2013084294A1 (en) * | 2011-12-06 | 2013-06-13 | 株式会社日立製作所 | Dynamic quantity measuring device |
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| JPWO2021065926A1 (en) * | 2019-10-02 | 2021-04-08 | ||
| WO2021065926A1 (en) * | 2019-10-02 | 2021-04-08 | ナブテスコ株式会社 | Sensor device, reducer, travel unit for crawler, fluid valve, fluid cylinder, fluid pump, fluid compressor, electric motor, electric actuator, structure, method in which sensor device is implemented, sensor system, and tablet |
| TWI819242B (en) * | 2019-10-02 | 2023-10-21 | 日商納博特斯克股份有限公司 | Sensing devices, structures, methods performed by sensing devices, sensing systems and nameplates |
| US11852504B2 (en) | 2019-10-02 | 2023-12-26 | Nabtesco Corporation | Sensor device, speed reducer, traveling unit for crawler, fluid valve, fluid cylinder, fluid pump, fluid compressor, electric motor, electric actuator, construction, method executed by sensor device, sensor system, and nomenclature plate |
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