JP2002236064A - Bolt with strain sensor, and strain sensor - Google Patents

Bolt with strain sensor, and strain sensor

Info

Publication number
JP2002236064A
JP2002236064A JP2001030474A JP2001030474A JP2002236064A JP 2002236064 A JP2002236064 A JP 2002236064A JP 2001030474 A JP2001030474 A JP 2001030474A JP 2001030474 A JP2001030474 A JP 2001030474A JP 2002236064 A JP2002236064 A JP 2002236064A
Authority
JP
Japan
Prior art keywords
bolt
strain
strain sensor
gauge
stress
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.)
Pending
Application number
JP2001030474A
Other languages
Japanese (ja)
Inventor
Takuya Endo
拓也 遠藤
Masatomo Mori
雅友 森
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Akebono Brake Industry Co Ltd
Original Assignee
Akebono Brake Industry Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Akebono Brake Industry Co Ltd filed Critical Akebono Brake Industry Co Ltd
Priority to JP2001030474A priority Critical patent/JP2002236064A/en
Publication of JP2002236064A publication Critical patent/JP2002236064A/en
Pending legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To provide a strain sensor and a bolt having the strain sensor capable of catching stress change with high sensitivity by shortening the distance from a stress concentrated point, embedding a stain gauge in an arbitrary depth according to bolt cutting work, arbitrarily selecting a sealing material of the strain gauge, easily being produced by a photo application, lowering the cost and making it accurate. SOLUTION: In the bolt 1, the loosening of bolt tightness can be detected by attaching the strain sensor 2, and the strain gauge 2 having a gauge resistor 21 extending or shrinking by receiving a stress in the axial direction of the bolt is provided in a recess 13 formed in the bolt head 12. The strain gauge 2 is provided in a gap 14 which is formed in the recess 13.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、歪みセンサ付きボ
ルト及び歪みセンサであり、特にボルトの締付け緩みを
検出することができる歪みセンサを装着したボルトに関
する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bolt with a strain sensor and a strain sensor, and more particularly to a bolt having a strain sensor capable of detecting loosening of the bolt.

【0002】[0002]

【従来の技術】高層ビル、列車等の構造物は、大型ボル
トを使用しており、締付けたボルトが緩むと悪影響が発
生する。また、原子力部品、宇宙部品等の高精度部品に
おいては、受ける応力の検知が要求されている。このた
め、従来、被測定物の表面に歪みゲージを装着していた
が、応力集中点からの距離が長くなり、応力変化を感度
良くとらえることが難しかった。また、歪みゲージ装着
の際に接着剤を使用すると、高温や低温時での耐久性に
問題が有った。更に、埋め込み型歪みゲージでは、表面
処理等にコストや工数がかかっていた。
2. Description of the Related Art High-rise buildings, trains, and other structures use large bolts, and any loosened bolts have an adverse effect. Further, in high-precision parts such as nuclear parts and space parts, detection of the stress received is required. For this reason, a strain gauge has conventionally been mounted on the surface of the object to be measured. However, the distance from the stress concentration point has been long, and it has been difficult to detect a stress change with high sensitivity. Further, when an adhesive is used when the strain gauge is attached, there is a problem in durability at high or low temperature. Further, in the embedded strain gauge, cost and man-hours are required for surface treatment and the like.

【0003】歪みゲージをボルトの頭側面に貼着した
り、頭部に穿設した孔に嵌入することが提案されている
(特開平9−269268号公報、特開平11−118
637号公報)が、検出対象はボルト頭部側面の変形や
締付け軸力による変形による歪みであって、応力集中点
からの距離が長くなり、また、軸方向の応力による歪み
ではないため、ネジの締付け緩みを正確には検知するこ
とができなかった。
It has been proposed to attach a strain gauge to the side of the head of a bolt or to fit it into a hole formed in the head (JP-A-9-269268, JP-A-11-118).
No. 637), the object to be detected is distortion due to deformation of the side of the bolt head or deformation due to tightening axial force, the distance from the stress concentration point becomes long, and it is not distortion due to axial stress. Could not be detected accurately.

【0004】[0004]

【発明が解決しようとする課題】本発明は、従来技術の
問題を解決するものであり、応力集中点からの距離を短
くして応力変化を感度良くとらえることができ、また、
ボルト切削加工次第で任意の深さに歪みゲージを埋め込
むことができ、そして、歪みゲージ封止材料を任意に選
択でき、更に、フォトファブリケーションにより製造が
容易で、低コスト、高精度とすることが可能な歪みセン
サ付きボルト及び歪みセンサを提供することを目的とす
る。
SUMMARY OF THE INVENTION The present invention solves the problems of the prior art, in which the distance from the stress concentration point can be shortened so that a change in stress can be detected with high sensitivity.
The strain gauge can be embedded at any depth depending on the bolt cutting process, and the sealing material for the strain gauge can be selected arbitrarily. Furthermore, photofabrication makes it easy to manufacture, low cost, and high precision It is an object of the present invention to provide a strain sensor-equipped bolt and a strain sensor capable of performing the following.

【0005】[0005]

【課題を解決するための手段】本発明は、歪みセンサを
装着してボルト締付け緩みを検出することができるボル
トであって、ボルト頭部に形成した凹部にボルト軸方向
の応力を受けて延び又は縮むゲージ抵抗部を有する歪み
ゲージを設ける歪みセンサ付きボルトである。
SUMMARY OF THE INVENTION The present invention relates to a bolt capable of detecting loosening of a bolt by mounting a strain sensor, and extends in a recess formed in the head of the bolt by receiving a stress in the axial direction of the bolt. Alternatively, it is a bolt with a strain sensor provided with a strain gauge having a gauge resistance portion that shrinks.

【0006】また、本発明は、上記歪みゲージは、凹部
に形成した空隙の上に設ける歪みセンサ付きボルトであ
る。
Further, the present invention is a bolt with a strain sensor, wherein the strain gauge is provided above a gap formed in a concave portion.

【0007】そして、本発明は、上記凹部は、封止材料
によって封止されている歪みセンサ付きボルトである。
The present invention is a bolt with a strain sensor, wherein the recess is sealed with a sealing material.

【0008】更に、本発明は、ボルトに装着してボルト
締付け緩みを検出する歪みセンサであって、ボルト軸方
向の応力を受けて延び又は縮むゲージ抵抗部を有し、か
つ、ボルト頭部に形成した凹部に取付ける歪みゲージを
備える歪みセンサである。
Further, the present invention relates to a strain sensor which is attached to a bolt to detect loosening of the bolt tightening, which has a gauge resistance portion which expands or contracts by receiving a stress in the axial direction of the bolt, and which has a gauge resistance portion on the bolt head. This is a strain sensor including a strain gauge attached to the formed recess.

【0009】[0009]

【発明の実施の形態】発明の実施の形態を説明する。本
発明の歪みセンサ付きボルト及び歪みセンサの発明の概
要、応力検出原理及び実施例について、図1〜図7を用
いて説明する。図1は、本発明の歪みセンサ付きボルト
(適正締付け状態)の概要説明図であり、(b)は、ゲ
ージ抵抗部拡大図である。図2は、本発明の歪みセンサ
付きボルト(締付けの緩んだ状態)の概要説明図であ
り、(b)は、ゲージ抵抗部拡大図である。図3は、本
発明の歪みセンサ付きボルトにおける応力検出原理の説
明図である。図4は、本発明の歪みセンサ付きボルトの
応力検出に使用するブリッジ回路の説明図である。図5
は、実施例の歪みセンサ付きボルトの説明図である。図
6は、実施例の歪みセンサ付きボルトの構造の説明図で
ある。図7は、実施例の歪みセンサ付きボルトの歪みゲ
ージの製造工程の説明図である。
Embodiments of the present invention will be described. The outline of the invention of the bolt with a strain sensor and the strain sensor of the present invention, the principle of stress detection, and an embodiment will be described with reference to FIGS. FIG. 1 is a schematic explanatory view of a bolt with a strain sensor (in a properly tightened state) of the present invention, and FIG. 1 (b) is an enlarged view of a gauge resistance portion. FIG. 2 is a schematic explanatory view of a bolt with a strain sensor of the present invention (in a loosened state), and FIG. 2B is an enlarged view of a gauge resistance portion. FIG. 3 is an explanatory view of the principle of stress detection in the bolt with a strain sensor of the present invention. FIG. 4 is an explanatory diagram of a bridge circuit used for detecting stress of a bolt with a strain sensor according to the present invention. FIG.
FIG. 3 is an explanatory view of a bolt with a strain sensor according to the embodiment. Drawing 6 is an explanatory view of the structure of the bolt with a strain sensor of an example. FIG. 7 is an explanatory diagram of a manufacturing process of the strain gauge of the bolt with the strain sensor according to the embodiment.

【0010】まず、発明の概要を説明する。本発明の歪
みセンサ付きボルト1は、図1(a)に示すように、ボ
ルト本体部11とボルト頭部12とから構成されてい
て、ボルト本体部11は、側面周囲にネジが切られてお
り、一方、ボルト頭部12は、凹部13を有しており、
そして、凹部13に形成した空隙14の上に歪みセンサ
2が装着されている。そして、ボルト1が取付部材4に
締付けて固定されている状態であるときは、図1(b)
に示すように、軸方向上側からの応力P1が大きくな
り、歪みゲージの変形量が大となってゲージ抵抗部21
が縮むこととなる。一方、ボルト1の締付けが緩んだ状
態のときは、図2(a)(b)に示すように、固定され
た状態に比べ、軸方向上側からの応力P2が小さくな
り、歪みゲージの変形量が少なくなって、ゲージ抵抗部
21が延びることとなる。そして、ゲージ抵抗部21の
抵抗値は延び縮み量に応じて変わるため、ゲージ抵抗部
21に入力電圧を印加すると、出力電圧が変化する。し
たがって、オフセット状態(ボルト固定時)における出
力電圧と比較することにより、軸方向の応力Pが変化し
たことが分かり、ボルト1の締付け緩みを検出すること
が可能となる。
First, the outline of the invention will be described. As shown in FIG. 1A, a bolt 1 with a strain sensor according to the present invention includes a bolt main body 11 and a bolt head 12, and the bolt main body 11 is threaded around a side surface. On the other hand, the bolt head 12 has a recess 13,
The strain sensor 2 is mounted on the gap 14 formed in the recess 13. When the bolt 1 is in a state of being fixedly fastened to the mounting member 4, FIG.
As shown in FIG. 7, the stress P1 from the upper side in the axial direction increases, the deformation amount of the strain gauge increases, and the
Will shrink. On the other hand, when the bolt 1 is loosely tightened, as shown in FIGS. 2A and 2B, the stress P2 from the upper side in the axial direction is smaller than that in the fixed state, and the deformation amount of the strain gauge is reduced. Is reduced, and the gauge resistance portion 21 is extended. Since the resistance value of the gauge resistor 21 changes according to the amount of expansion and contraction, when an input voltage is applied to the gauge resistor 21, the output voltage changes. Therefore, by comparing with the output voltage in the offset state (when the bolt is fixed), it is found that the stress P in the axial direction has changed, and it is possible to detect the loosening of the bolt 1.

【0011】本発明の歪みゲージ付きボルトにおける応
力検出原理を説明する。一般に、被測定物に引っ張り力
(又は圧縮力)Pが加わると、図3に示すように、応力
が材料内部に発生する。この応力に比例した引っ張り歪
み(又は圧縮歪み)が生じ、被測定物の長さLは、L+
ΔL(又はL−ΔL)に変形する。歪みは、LとΔLの
割合であるので、歪みεは、 ε=ΔL/L ただし、L:被抵抗物イニシャル長、ΔL:外力Pによ
る変化分、で表される。そして、被測定物である歪みゲ
ージに歪みが発生すると、ゲージ抵抗部に歪みが生じ
る。生じた歪みに対応した抵抗変化と歪みεの関係は、 ε=ΔL/L=(ΔR/R)/K ただし、R:ゲージ抵抗値、ΔR:歪みを受けたときの
抵抗値変化量、K:ゲージ率(係数)、で表される。
The principle of stress detection in the bolt with a strain gauge of the present invention will be described. Generally, when a tensile force (or a compressive force) P is applied to an object to be measured, a stress is generated inside the material as shown in FIG. A tensile strain (or a compressive strain) proportional to the stress is generated, and the length L of the measured object is L +
Deforms to ΔL (or L−ΔL). Since the strain is a ratio of L to ΔL, the strain ε is represented by ε = ΔL / L, where L: initial length of the object to be resisted, and ΔL: change due to external force P. When strain occurs in the strain gauge, which is the device under test, strain occurs in the gauge resistance section. The relationship between the resistance change corresponding to the generated strain and the strain ε is as follows: ε = ΔL / L = (ΔR / R) / K where R: gauge resistance value, ΔR: resistance value change amount when subjected to strain, K : Expressed by gauge factor (coefficient).

【0012】本発明の歪みセンサ付きボルトにおける歪
みゲージの抵抗変化は微少な値なので、図4に示すよう
に、ブリッジ回路を用いて電圧に変換することができ
る。そして、ブリッジ回路の出力電圧eは、 e={(R−R)/(R+R)(R
+R)}E ただし、E:入力電圧、R:歪みゲージのゲージ抵抗
値、R〜R:固定抵抗値、で表されるので、出力電
圧eは、歪みゲージのゲージ抵抗値Rが変化すると、
変動することとなる。したがって、歪みセンサ付きボル
トについて、適正ボルト締付け時における出力電圧e
を事前に測定しておくと、判断対象のボルトにおける出
力電圧eを測定し、得られた出力電圧eについて、適正
ボルト締付け時における出力電圧eとの差が所定の割
合(又は量)以上であるときに、ボルト締付けが緩んで
いると判断することができる。また、ボルト締付けが緩
んでいる時の出力電圧eを事前に測定し、そして、ボ
ルト締付けが緩んでいる時の出力電圧eとの差が所定
の割合(又は量)以下であるときに、ボルト締付けが緩
んでいると判断することも可能である。更に、適正ボル
ト締付け時及びボルト締付けが緩んでいる時におけるそ
れぞれの出力電圧e、eを事前に測定しておくと、
判断対象のボルトを測定して得られた出力電圧eについ
て、出力電圧e及びeと比較することにより、ボル
ト締付けの緩み具合を算出することも可能である。
Since the resistance change of the strain gauge in the bolt with a strain sensor of the present invention is a very small value, it can be converted to a voltage using a bridge circuit as shown in FIG. The output voltage e of the bridge circuit is e = 、 (R 1 R 3 −R 2 R 4 ) / (R 1 + R 2 ) (R 3
+ R 4 )} E where E: input voltage, R 1 : gauge resistance value of strain gauge, R 2 to R 4 : fixed resistance value, so that output voltage e is gauge resistance value of strain gauge R When 1 changes,
Will fluctuate. Therefore, the output voltage e 0 of the bolt with the strain sensor when the bolt is properly tightened.
Is measured in advance, the output voltage e at the volt to be determined is measured, and the difference between the obtained output voltage e and the output voltage e 0 at the time of proper bolt tightening is a predetermined ratio (or amount) or more. It can be determined that the bolt tightening is loose. Further, the output voltage e 1 when the bolt fastening is loose measured in advance, and, when the difference between the output voltage e 1 when the bolt fastening is loose is a predetermined percentage (or amount) below It is also possible to determine that the bolt tightening is loose. Furthermore, when the output voltages e 0 and e 1 at the time of proper bolt tightening and when the bolt tightening is loose are measured in advance,
By comparing the output voltage e obtained by measuring the volt to be determined with the output voltages e 0 and e 1 , it is also possible to calculate the degree of loosening of the bolt tightening.

【0013】実施例を説明する。本実施例のボルト1
は、図5に示すように、ボルト本体部11と、ボルト頭
部12とからなり、ボルト本体部11は、周囲にネジが
切られており、ボルト頭部12は、中心部を削って凹部
13を形成し、凹部13底面に歪みゲージ2を接着す
る。歪みゲージ2の下部は空洞14となっている。歪み
ゲージ2から配線25が出されており、そして、凹部1
3は樹脂又はパテ等の封止材料3で封止されている。歪
みゲージ2は、図6に示すように、Siウエハ22と、
Siウエハ22に形成されたゲージ抵抗部21と、酸化
膜23と、アルミパッド24と、配線25と、からな
る。歪みゲージ2は、ボルト頭部12に形成した凹部1
3に装着しているため、軸方向の応力集中点からの距離
を短くすることができ、感度良くとらえることが可能で
あり、また、ボルト切削加工次第で任意の深さに埋め込
むことができ、また、歪みゲージ2は、空洞14の上に
形成されているため、軸方向応力を受けると感度良く変
形することができる。
An embodiment will be described. Bolt 1 of this embodiment
As shown in FIG. 5, the bolt body 11 includes a bolt head 11 and a bolt head 12. The bolt body 11 is threaded around the bolt head 12. 13 is formed, and the strain gauge 2 is bonded to the bottom of the recess 13. The lower part of the strain gauge 2 is a cavity 14. The wiring 25 is extended from the strain gauge 2 and the recess 1
Numeral 3 is sealed with a sealing material 3 such as resin or putty. As shown in FIG. 6, the strain gauge 2
It comprises a gauge resistor portion 21 formed on a Si wafer 22, an oxide film 23, an aluminum pad 24, and a wiring 25. The strain gauge 2 has a concave portion 1 formed in a bolt head 12.
3, the distance from the stress concentration point in the axial direction can be shortened, it is possible to capture with high sensitivity, and it can be embedded at any depth depending on the bolt cutting process. Further, since the strain gauge 2 is formed on the cavity 14, it can be deformed with high sensitivity when subjected to an axial stress.

【0014】実施例の歪みセンサ付きボルトにおけるボ
ルト締付けの緩みの掲出について、説明する。配線25
間に所定の入力電圧を印加して出力電圧eを測定する。
適正ボルト締付け時における出力電圧eを事前に測定
しているため、判断対象のボルトにおける出力電圧eを
測定して得られて出力電圧eについて、出力電圧e
の差が所定の割合(又は量)以上であるときに、ボルト
締付けが緩んでいると判断することができる。
A description will be given of the notification of loosening of the bolt tightening in the bolt with a strain sensor according to the embodiment. Wiring 25
During this period, a predetermined input voltage is applied and the output voltage e is measured.
Since the measured output voltage e 0 at proper bolt tightening in advance, the output voltage e is obtained by measuring the output voltage e in volts determination target, the percentage difference is given between the output voltage e 0 ( Or the amount) or more, it can be determined that the bolt tightening is loose.

【0015】本実施例における歪みゲージの製造プロセ
スについて、図7を用いて説明する。まず、Siウエハ
22を用意する(図7a)。そして、半導体技術によ
り、Siウエハ22に酸化膜23を積層する(図7
b)。次に、フォトリソグラフィ技術により、不要な部
分の酸化膜を除去する(図7c)。そして、不純物(ゲ
ージ抵抗)21をドープする(図7d)。再び酸化膜2
3を積層し、フォトリソグラフィをする(図7e)。ア
ルミパッド24をスパッタリングして配線25を取り付
ける(図7f)。このように、フォトファブリケーショ
ンにより製造が容易で、低コスト、高精度とすることが
可能な歪みゲージ2を製造することができる。
The manufacturing process of the strain gauge in this embodiment will be described with reference to FIG. First, a Si wafer 22 is prepared (FIG. 7A). Then, an oxide film 23 is laminated on the Si wafer 22 by a semiconductor technology (FIG. 7).
b). Next, an unnecessary portion of the oxide film is removed by a photolithography technique (FIG. 7C). Then, an impurity (gauge resistance) 21 is doped (FIG. 7D). Oxide film 2 again
3 and photolithography (FIG. 7e). The wiring 25 is attached by sputtering the aluminum pad 24 (FIG. 7F). Thus, the strain gauge 2 that can be easily manufactured by photofabrication, can be manufactured at low cost, and has high accuracy can be manufactured.

【0016】[0016]

【発明の効果】本発明によれば、応力集中点からの距離
を短くして応力変化を感度良くとらえることができ、ま
た、ボルト切削加工次第で任意の深さに歪みゲージを埋
め込むことができ、そして、歪みゲージ封止材料を任意
に選択でき、更に、フォトファブリケーションにより製
造が容易で、低コスト、高精度とすることが可能な歪み
センサ付きボルト及び歪みセンサを得ることができる。
According to the present invention, the distance from the stress concentration point can be shortened so that the change in stress can be detected with high sensitivity, and the strain gauge can be embedded at an arbitrary depth depending on the bolt cutting process. Further, a strain gauge sealing material can be arbitrarily selected, and a bolt with a strain sensor and a strain sensor which can be easily manufactured by photofabrication, can be manufactured at low cost, and have high accuracy can be obtained.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の歪みセンサ付きボルト(適正締付け状
態)の概要説明図。
FIG. 1 is a schematic explanatory view of a bolt with a strain sensor (properly tightened state) of the present invention.

【図2】本発明の歪みセンサ付きボルト(締付けの緩ん
だ状態)の概要説明図。
FIG. 2 is a schematic explanatory view of a bolt with a strain sensor of the present invention (in a state where tightening is loosened).

【図3】本発明の歪みセンサ付きボルトにおける応力検
出原理の説明図。
FIG. 3 is an explanatory view of a stress detection principle in the bolt with a strain sensor of the present invention.

【図4】本発明の歪みセンサ付きボルトの応力検出に使
用するブリッジ回路の説明図。
FIG. 4 is an explanatory diagram of a bridge circuit used for detecting stress of a bolt with a strain sensor according to the present invention.

【図5】実施例の歪みセンサ付きボルトの説明図。FIG. 5 is an explanatory view of a bolt with a strain sensor according to the embodiment.

【図6】実施例の歪みセンサ付きボルトの構造の説明
図。
FIG. 6 is an explanatory diagram of a structure of a bolt with a strain sensor according to the embodiment.

【図7】実施例の歪みセンサ付きボルトの歪みゲージの
製造工程の説明図。
FIG. 7 is an explanatory diagram of a manufacturing process of the strain gauge of the bolt with the strain sensor according to the embodiment.

【符号の説明】[Explanation of symbols]

1 ボルト 11 ボルト本体部 12 ボルト頭部 13 凹部 14 空隙 2 歪みセンサ 21 ゲージ抵抗 22 Siウエハ 23 酸化膜 24 アルミパッド 25 配線 3 樹脂 4 取付部材 REFERENCE SIGNS LIST 1 bolt 11 bolt main body part 12 bolt head part 13 concave part 14 air gap 2 strain sensor 21 gauge resistance 22 Si wafer 23 oxide film 24 aluminum pad 25 wiring 3 resin 4 mounting member

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 歪みセンサを装着してボルト締付け緩み
を検出することができるボルトであって、 ボルト頭部に形成した凹部にボルト軸方向の応力を受け
て延び又は縮むゲージ抵抗部を有する歪みゲージを設け
ることを特徴とする歪みセンサ付きボルト。
1. A bolt capable of detecting loosening of a bolt by mounting a strain sensor, the strain having a gauge resistance portion which expands or contracts by receiving a stress in a bolt axial direction in a concave portion formed in the bolt head. A bolt with a strain sensor, which is provided with a gauge.
【請求項2】 請求項1記載の歪みセンサ付きボルトに
おいて、 上記歪みゲージは、凹部に形成した空隙の上に設けるこ
とを特徴とする歪みセンサ付きボルト。
2. The bolt with a strain sensor according to claim 1, wherein the strain gauge is provided on a gap formed in a concave portion.
【請求項3】 請求項1又は2に記載の歪みセンサ付き
ボルトにおいて、 上記凹部は、封止材料によって封止されていることを特
徴とする歪みセンサ付きボルト。
3. The bolt with a strain sensor according to claim 1, wherein the concave portion is sealed with a sealing material.
【請求項4】 ボルトに装着してボルト締付け緩みを検
出する歪みセンサであって、 ボルト軸方向の応力を受けて延び又は縮むゲージ抵抗部
を有し、かつ、ボルト頭部に形成した凹部に取付ける歪
みゲージを備えることを特徴とする歪みセンサ。
4. A strain sensor which is attached to a bolt to detect loosening of a bolt tightening, the gauge sensor having a gauge resistance portion which expands or contracts by receiving a stress in a bolt axial direction, and which has a recess formed in a bolt head. A strain sensor comprising a strain gauge to be attached.
JP2001030474A 2001-02-07 2001-02-07 Bolt with strain sensor, and strain sensor Pending JP2002236064A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001030474A JP2002236064A (en) 2001-02-07 2001-02-07 Bolt with strain sensor, and strain sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001030474A JP2002236064A (en) 2001-02-07 2001-02-07 Bolt with strain sensor, and strain sensor

Publications (1)

Publication Number Publication Date
JP2002236064A true JP2002236064A (en) 2002-08-23

Family

ID=18894690

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001030474A Pending JP2002236064A (en) 2001-02-07 2001-02-07 Bolt with strain sensor, and strain sensor

Country Status (1)

Country Link
JP (1) JP2002236064A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2409888A (en) * 2004-01-08 2005-07-13 Ciptex Ltd Rotation indicator for screw threaded connectors used to secure railway tracks
JP2007247903A (en) * 2007-03-22 2007-09-27 Japan Science & Technology Agency Flange connection member and abnormality detecting device for pipeline using the same
CN103154535A (en) * 2010-10-11 2013-06-12 喜利得股份公司 Sensor arrangement, for example on an anchor bolt
JP2015064109A (en) * 2007-06-26 2015-04-09 スウエイジロク・カンパニー Conduit connection with sensing function
US9518849B2 (en) 2015-01-20 2016-12-13 Hyundai Motor Company Acoustic sensor apparatus
JPWO2015075823A1 (en) * 2013-11-22 2017-03-16 株式会社サンノハシ Bolt, nut and strain measurement system
CN108917997A (en) * 2018-07-27 2018-11-30 中国核动力研究设计院 A kind of connecting component stress mornitoring system suitable for small space
CN109612626A (en) * 2019-01-03 2019-04-12 武汉科技大学 A kind of Axial stress in bolt sensor
US10295093B2 (en) 2007-06-26 2019-05-21 Swagelok Company Conduit connection with sensor on a threaded body
US10578503B2 (en) 2015-03-06 2020-03-03 Swagelok Company System and methods for strain detection in a coupling
KR20210020501A (en) * 2019-08-14 2021-02-24 현대모비스 주식회사 Apparatus For Mounting Sensor And Method Thereof
JP2021131145A (en) * 2020-02-21 2021-09-09 株式会社フジキン bolt

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2409888A (en) * 2004-01-08 2005-07-13 Ciptex Ltd Rotation indicator for screw threaded connectors used to secure railway tracks
JP2007247903A (en) * 2007-03-22 2007-09-27 Japan Science & Technology Agency Flange connection member and abnormality detecting device for pipeline using the same
JP4554634B2 (en) * 2007-03-22 2010-09-29 独立行政法人科学技術振興機構 Flange coupling member and pipeline abnormality detection apparatus using the same
JP2016196962A (en) * 2007-06-26 2016-11-24 スウエイジロク・カンパニー Conduit connection having sensing function
JP2015064109A (en) * 2007-06-26 2015-04-09 スウエイジロク・カンパニー Conduit connection with sensing function
JP2016128721A (en) * 2007-06-26 2016-07-14 スウエイジロク・カンパニー Conduit connection having sensing function
US9400070B2 (en) 2007-06-26 2016-07-26 Swagelok Company Conduit fitting with sensor on a threaded nut
US10295093B2 (en) 2007-06-26 2019-05-21 Swagelok Company Conduit connection with sensor on a threaded body
US9417169B2 (en) 2010-10-11 2016-08-16 Hilti Aktiengesellschaft Sensor arrangement, for example, on an anchor bolt
CN103154535A (en) * 2010-10-11 2013-06-12 喜利得股份公司 Sensor arrangement, for example on an anchor bolt
JPWO2015075823A1 (en) * 2013-11-22 2017-03-16 株式会社サンノハシ Bolt, nut and strain measurement system
US20170138387A1 (en) * 2013-11-22 2017-05-18 Sannohashi Corporation Bolt, nut, and strain measurement system
US9518849B2 (en) 2015-01-20 2016-12-13 Hyundai Motor Company Acoustic sensor apparatus
US10578503B2 (en) 2015-03-06 2020-03-03 Swagelok Company System and methods for strain detection in a coupling
CN108917997A (en) * 2018-07-27 2018-11-30 中国核动力研究设计院 A kind of connecting component stress mornitoring system suitable for small space
CN109612626A (en) * 2019-01-03 2019-04-12 武汉科技大学 A kind of Axial stress in bolt sensor
KR20210020501A (en) * 2019-08-14 2021-02-24 현대모비스 주식회사 Apparatus For Mounting Sensor And Method Thereof
KR102660498B1 (en) 2019-08-14 2024-04-24 현대모비스 주식회사 Apparatus For Mounting Sensor And Method Thereof
JP2021131145A (en) * 2020-02-21 2021-09-09 株式会社フジキン bolt

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