JPS5913685B2 - Acceleration sensor - Google Patents
Acceleration sensorInfo
- Publication number
- JPS5913685B2 JPS5913685B2 JP52036468A JP3646877A JPS5913685B2 JP S5913685 B2 JPS5913685 B2 JP S5913685B2 JP 52036468 A JP52036468 A JP 52036468A JP 3646877 A JP3646877 A JP 3646877A JP S5913685 B2 JPS5913685 B2 JP S5913685B2
- Authority
- JP
- Japan
- Prior art keywords
- acceleration sensor
- protruding piece
- base
- acceleration
- mounting groove
- 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
Links
- 230000001133 acceleration Effects 0.000 title claims description 28
- 238000001514 detection method Methods 0.000 claims description 20
- 239000003758 nuclear fuel Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Description
【発明の詳細な説明】
本発明は加速度センサー、特に原子炉燃料棒等９０の小
型部材の振動解析に有用な超小型加速度センサーに関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an acceleration sensor, and particularly to an ultra-compact acceleration sensor useful for vibration analysis of small members such as nuclear reactor fuel rods.
小型部材、例えば内径５、６ｍｍ程度である原子炉燃料
棒等に挿入して振動解析を行なう為には小型かつ感度が
高＜安定性の優れた加速度センサー３５が必要とされる
。In order to perform vibration analysis by inserting into a small member, such as a nuclear reactor fuel rod having an inner diameter of about 5 or 6 mm, an acceleration sensor 35 that is small and has high sensitivity and excellent stability is required.
しかしながら、この様な要望を満足する超小型（細型）
の加速度センサーは従来得られなかつた。本発明は構造
が簡単で製造が容易であり、しかも細型の超小型加速度
センサーを提供しようとするものである。However, ultra-compact (slender)
This acceleration sensor has not been available in the past. The present invention aims to provide an ultra-compact acceleration sensor that has a simple structure, is easy to manufacture, and is slim.
また、本発明は複数の検出方向を有する加速度センサー
をも極めて容易に提供できる事を目的としている。以下
、本発明の実施例を図面に従つて説明する。Further, the present invention aims to extremely easily provide an acceleration sensor having a plurality of detection directions. Embodiments of the present invention will be described below with reference to the drawings.
第１図Ａは本発明実施例の加速度検出素子の基体部分の
断面図であり、第１図Ｂはその側面図である。すなわち
、基体１は突出片２を有しており、該突出片上に圧電素
子３及び付加質量４が設けられている。FIG. 1A is a sectional view of a base portion of an acceleration detecting element according to an embodiment of the present invention, and FIG. 1B is a side view thereof. That is, the base body 1 has a protruding piece 2, on which a piezoelectric element 3 and an additional mass 4 are provided.
また、基体端部にはつば部５が形成されており、基体に
は圧電素子３から出力ケーブルを外部へ導出する為の貫
通孔６が形成されている。第２図Ａは第１図に示した基
体に組合されるケース部分の断面図であり、第２図Ｂは
その側面図である。すなわち、ケース７には筒状部分８
とつば部５′が形成されており、前記筒状部分は前記突
出片２を収容する如く形成されている。Further, a collar 5 is formed at the end of the base, and a through hole 6 is formed in the base for leading the output cable from the piezoelectric element 3 to the outside. FIG. 2A is a cross-sectional view of a case portion assembled with the base body shown in FIG. 1, and FIG. 2B is a side view thereof. That is, the case 7 has a cylindrical portion 8.
A flange portion 5' is formed, and the cylindrical portion is formed to accommodate the protruding piece 2.
上述のつば部５及び５′には溝部９及び９′が形成され
ている。Grooves 9 and 9' are formed in the aforementioned collar parts 5 and 5'.
該溝部９及び９′は複数個の検出素子を連結して複数方
向の検出を行なう場合の結合部あるいは被検出体への取
付部となる。なお第１図ＡＫ｝いて圧電素子から導出さ
れるケーブルは記載を省略している。第３図は第１図及
び第２図に示した基体及びケースを組合せた加速度検出
素子の正面図であり、１０はケーブルを示している。The groove portions 9 and 9' serve as a connecting portion when a plurality of detection elements are connected to perform detection in a plurality of directions, or a portion for attaching to a detected object. Note that in FIG. 1, the cable led out from the piezoelectric element is omitted. FIG. 3 is a front view of an acceleration detecting element that combines the base body and case shown in FIGS. 1 and 2, and 10 indicates a cable.
前記ケーブルとしてはテフロン被覆の低雑音処理シール
ドケーブル ５が望ましい。基体のつば部５、突出部２
は一体加工により形成する事が、強度、検出特性、等の
面から望ましい前記基体とケースの組合せは、本実施例
では工 ５ポキシ系接着剤を用いて固着している。The cable is preferably a low-noise shielded cable 5 coated with Teflon. Base flange 5, protrusion 2
In this embodiment, the combination of the base and the case, which is preferably formed by integral processing in terms of strength, detection characteristics, etc., is fixed using a poxy adhesive.
第４図Ａは本発明の多方向型加速度センサーの実施例を
示す正面図である。FIG. 4A is a front view showing an embodiment of the multidirectional acceleration sensor of the present invention.
本実施例の場合は、第１図〜第２図に示した加速度検出
素子３１をｘ方向検出素子とし、前記検 ４出素子３１
に対して前記突出片２の平面方向が９０子相違している
検出素子３２をｙ方向検出素子とし、互いに直角をなす
Ｘ，ｙ両方向の検出を行なう加速度センサーとしている
。In the case of this embodiment, the acceleration detection element 31 shown in FIGS. 1 and 2 is used as an x-direction detection element, and the four detection elements 31
The detecting element 32 in which the planar direction of the protruding piece 2 is different by 90 degrees is used as a y-direction detecting element, and is used as an acceleration sensor that performs detection in both the X and Y directions that are perpendicular to each other.
すなわちｘ方向検出素子３１のつば部３３の溝とｙ方向
検出素子３２のつば部３４の溝を画素子の突出片の平面
が相互に９０度ずれる如く形成し、両溝に連結棒３５を
挿入し、スポツト溶接等で固着する。That is, the groove in the flange 33 of the x-direction detection element 31 and the groove in the flange 34 of the y-direction detection element 32 are formed so that the planes of the protruding pieces of the pixel elements are shifted by 90 degrees from each other, and the connecting rod 35 is inserted into both grooves. Then, fix it by spot welding, etc.
ｘ方向検出素子３１から導出された出力ケーブル３６は
ｙ方向検出素子３２のつば部３４に溝等を設け、接着剤
で固着する事が検出素子への影響を防ぐ上で望ましい。It is desirable that the output cable 36 led out from the x-direction detection element 31 be provided with a groove or the like in the collar 34 of the y-direction detection element 32 and fixed with adhesive to prevent any influence on the detection element.
第３図Ａに示した画素子の組立体は例えば原子炉用燃料
棒等の振動解析に用いる場合は第４図Ｂに示した如きパ
イプ内に収容固定して用いる。When the pixel element assembly shown in FIG. 3A is used for vibration analysis of, for example, a fuel rod for a nuclear reactor, it is housed and fixed in a pipe as shown in FIG. 4B.
パイプの中心に圧電素子を正確に配置する為にはつば部
がパイプ内面４１に適合している事が必要である。これ
に対して、加速度センサーを多数組パイプ内に収容した
場合ケーブルを通すスペースが必要となる。この為、本
実施例ではつば部に空隙３７及び３７′を設けている。
この空隙は前記溝３３，３４に対してそれぞれ反対の位
置が望ましく、その大きさは中心に対して前後９０度程
度であれば圧電素子の位置ずれに対する影響は少ない。
本発明による加速度センサーは構成が簡単であり、容易
に超小型化、細型化が実現でき、内径５，６１ｎ程度の
原子炉燃料棒等に組込んで振動解析が行なえるなど従来
にない加速度センサーを提供でき、また、つば部と筒状
部分によるつづみ形とした為に軽量化が実現できるなど
センサー自体の質量が小さいので小型部材の加速度検出
に影響が少なく検出感度が向上し、接合用の溝の形成位
置を相互にずらして決定することにより極めて容易に複
数方向の検出が可能となる等優れたものである。In order to accurately locate the piezoelectric element in the center of the pipe, it is necessary that the collar portion conform to the inner surface 41 of the pipe. On the other hand, when multiple sets of acceleration sensors are housed in a pipe, a space is required for the cables to pass through. For this reason, in this embodiment, gaps 37 and 37' are provided in the collar.
It is desirable that these gaps be located at opposite positions to the grooves 33 and 34, respectively, and if the size of the gaps is about 90 degrees from the front and back with respect to the center, there will be little effect on the displacement of the piezoelectric element.
The acceleration sensor according to the present invention has a simple configuration, can be easily made ultra-small and thin, and can be incorporated into reactor fuel rods with an inner diameter of about 5.61 nm to perform vibration analysis, which is an unprecedented acceleration sensor. In addition, the clasp shape of the collar and cylindrical part makes it lightweight, and the mass of the sensor itself is small, so it has less effect on acceleration detection of small parts and improves detection sensitivity, making it suitable for joining. This is an excellent feature in that by determining the formation positions of the grooves by shifting them from each other, detection in multiple directions can be performed extremely easily.
第１図Ａ，Ｂは本発明実施例の基体部分を示す断面図及
び側面図である。
第２図Ａ，Ｂは本発明実施例のケース部分を示す断面図
及び側面図である。第３図は第１図、第２図に示した各
部分を組合せた場合を示す正面図である。第４図Ａは本
発明の実施例の多方向型加速度センサーを示す正面図で
あり、第４図Ｂはこれを収容するパイプの断面図である
。１・・・基体、２・・・突出部、３・・・圧電素子、
４・・・付加質量、５，５・・・つば部、７・・・ケー
ス、８・・・筒状部分、９，９・・・溝。FIGS. 1A and 1B are a sectional view and a side view showing a base portion of an embodiment of the present invention. FIGS. 2A and 2B are a sectional view and a side view showing the case portion of the embodiment of the present invention. FIG. 3 is a front view showing a case where the parts shown in FIGS. 1 and 2 are combined. FIG. 4A is a front view showing a multidirectional acceleration sensor according to an embodiment of the present invention, and FIG. 4B is a sectional view of a pipe that accommodates the multidirectional acceleration sensor. DESCRIPTION OF SYMBOLS 1... Base body, 2... Protrusion part, 3... Piezoelectric element,
4...Additional mass, 5,5...Brim part, 7...Case, 8...Cylindrical part, 9,9...Groove.
Claims (1)
円弧状つば部を一体に有する基体と、筒状部分と円弧状
つば部を有するケースとが、前記突出片を前記筒状部分
に収容する如く組合され、前記基体には前記圧電素子か
ら導出された出力ケーブルを引出す貫通孔が形成され、
前記基体及びケースのつば部にはそれだれ取付溝が設け
られており、前記基体側つば部の取付溝は前記突出片の
平面に対し特定の位置関係をなしていることを特徴とす
る加速度検出素子を少なくとも１個用いた加速度センサ
ー。 ２ 前記基体側取付溝が、前記突出片の平面に対して９
０度となるつば部上の位置の少なくとも１つに設けられ
ていることを特徴とする特許請求の範囲第１項記載の加
速度センサー。 ３ 前記基体側取付溝が、前記突出片の平面に対応する
つば部上の位置の少なくとも１つに設けられていること
を特徴とする特許請求の範囲第１項記載の加速度センサ
ー。 ４ 圧電素子及び付加質量が設けられた突出片ならびに
円弧状つば部を一体に有する基体と、筒状部分と円弧状
つば部を有するケースとが、前記突出片を前記筒状部分
に収容する如く組合され、前記基体及びケースのつば部
にはそれぞれ取付溝が設けられている加速度検出素子を
少なくとも２個用い、各加速度検出素子毎に前記基体側
取付溝を前記突出片の平面に対して異なる位置関係とな
る如く設定し、各取付溝に連結棒を挿入固定することに
より、検出方向が相互に相違する如く結合してなる多方
向型加速度センサー。 ５ 前記検出方向が相互に９０度相違する如く、２個の
前記加速度検出素子が結合されてなる特許請求の範囲第
４項記載の多方向型加速度センサー。[Scope of Claims] 1. A base body integrally having a protruding piece provided with a piezoelectric element and an additional mass, and an arcuate flange portion, and a case having a cylindrical portion and an arcuate flange portion, the protruding piece is connected to the tube. a through hole is formed in the base body to draw out an output cable led out from the piezoelectric element;
The acceleration detection device is characterized in that mounting grooves are provided in the flange portions of the base body and the case, and the mounting grooves on the base side flange portion have a specific positional relationship with respect to the plane of the protruding piece. An acceleration sensor using at least one element. 2. The base side mounting groove is at an angle of 9 with respect to the plane of the protruding piece.
2. The acceleration sensor according to claim 1, wherein the acceleration sensor is provided at at least one position on the collar that corresponds to 0 degrees. 3. The acceleration sensor according to claim 1, wherein the base-side mounting groove is provided at at least one position on the flange corresponding to the plane of the protruding piece. 4. A base body integrally having a piezoelectric element and a protruding piece provided with an additional mass and an arcuate flange, and a case having a cylindrical part and an arcuate flange, such that the protruding piece is accommodated in the cylindrical part. At least two acceleration detecting elements are used in combination, each of which has a mounting groove in the flange of the base and the case, and the base-side mounting groove is different for each acceleration detecting element with respect to the plane of the protruding piece. A multi-directional acceleration sensor that is connected so that the detection directions are different from each other by setting a positional relationship and inserting and fixing a connecting rod into each mounting groove. 5. The multidirectional acceleration sensor according to claim 4, wherein two of the acceleration detection elements are connected such that the detection directions are different from each other by 90 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52036468A JPS5913685B2 (en) | 1977-03-31 | 1977-03-31 | Acceleration sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52036468A JPS5913685B2 (en) | 1977-03-31 | 1977-03-31 | Acceleration sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS53131078A JPS53131078A (en) | 1978-11-15 |
| JPS5913685B2 true JPS5913685B2 (en) | 1984-03-31 |
Family
ID=12470635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP52036468A Expired JPS5913685B2 (en) | 1977-03-31 | 1977-03-31 | Acceleration sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5913685B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6115983U (en) * | 1984-07-05 | 1986-01-30 | 兼行 杉原 | Fish processing equipment |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02248086A (en) * | 1989-03-22 | 1990-10-03 | Matsushita Electric Ind Co Ltd | Acceleration sensor |
-
1977
- 1977-03-31 JP JP52036468A patent/JPS5913685B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6115983U (en) * | 1984-07-05 | 1986-01-30 | 兼行 杉原 | Fish processing equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS53131078A (en) | 1978-11-15 |
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