JPH087105B2 - Gasket type pressure sensor - Google Patents
Gasket type pressure sensorInfo
- Publication number
- JPH087105B2 JPH087105B2 JP62068926A JP6892687A JPH087105B2 JP H087105 B2 JPH087105 B2 JP H087105B2 JP 62068926 A JP62068926 A JP 62068926A JP 6892687 A JP6892687 A JP 6892687A JP H087105 B2 JPH087105 B2 JP H087105B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure sensor
- piezoelectric element
- type pressure
- electrode plate
- plate
- 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 - Fee Related
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/24—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed
- G01L5/243—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed using washers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） この発明は、内燃機関の燃焼室より生じる圧力を検知
する圧力センサーに関する。Description: TECHNICAL FIELD The present invention relates to a pressure sensor for detecting a pressure generated in a combustion chamber of an internal combustion engine.
（従来の技術） 従来、内燃機関における燃焼室の圧力を検知するガス
ケツト型の圧力センサーは、検知する圧電素子が、環状
となつており、この環状の圧電素子を同型状の板パツキ
ンあるいは絶縁体により挾持した上、金属製外皮によつ
て内封し例えばスパークプラグのガスケツトシート面と
シリンダーヘツドのプラグ座間に固定して、燃焼圧力歪
に対応する出力信号を取出すもの（実開昭61−60137
号）が提案されている。(Prior Art) Conventionally, a gasket-type pressure sensor for detecting the pressure of a combustion chamber in an internal combustion engine has a piezoelectric element for detection that is formed in an annular shape, and the annular piezoelectric element is a plate packing or an insulator of the same shape. It is held by a metal shell and is sealed inside, for example, fixed between the gasket seat surface of the spark plug and the plug seat of the cylinder head, and the output signal corresponding to the combustion pressure distortion is taken out. 60137
No.) is proposed.
（発明が解決しようとする課題） しかしながら、上記のもの特に、実開昭61−60137号
の場合、圧力を検知する圧電素子の形状をパツキンの形
状に合致させて環状とするため、例えば圧電磁器よりな
る円板の圧電素子材料から加工すると、同一の環状圧電
素子は１個しか取ることができず、その大部分を廃棄し
てしまうこととなるため材料の無駄が多くなるものであ
り、また上記の如く圧力センサーをスパークプラグのシ
ート面に配してシリンダーヘツドの座間に締付時や金属
外皮内封入前後において、圧電素子に応力が局部的に加
わる時破損しやすいという欠点をもつものであつた。そ
こで、この発明は上記従来のもののもつ欠点を改善する
ものであり、圧電素子の成形時の歩留りを上げ、製品時
において、部分負荷（不均等荷重）に対する耐衝撃性を
向上させようとするものである。(Problems to be Solved by the Invention) However, in the case of the above-mentioned one, in particular, Japanese Utility Model Laid-Open No. 61-60137, in order to match the shape of the piezoelectric element for detecting pressure with the shape of the packing to make it annular, a piezoelectric ceramic, When the piezoelectric element material made of a circular disk is processed, only one identical annular piezoelectric element can be taken, and most of it is discarded, resulting in a large amount of wasted material. As described above, the pressure sensor is arranged on the seat surface of the spark plug, and it has a drawback that it is easily damaged when stress is locally applied to the piezoelectric element when it is tightened between the seats of the cylinder head or before and after the metal shell is sealed. Atsuta Therefore, the present invention is intended to improve the drawbacks of the above-mentioned conventional ones, and it is intended to increase the yield at the time of molding the piezoelectric element and to improve the impact resistance against a partial load (uneven load) at the time of production. Is.
（課題を解決するための手段） そのために環状の板パッキンと絶縁板に挟持される電
極板上に、圧電素子を分割して形成するブロック素子を
軸心を中心とする同芯円上の位置に３個以上を等間隔に
配置して接着すると共に、金属製ケース内に絶縁性充填
材を封入し、内封してなるものである。(Means for Solving the Problem) For this purpose, a block element formed by dividing a piezoelectric element on an electrode plate sandwiched between an annular plate packing and an insulating plate is located on a concentric circle centered on the axis. In this case, three or more pieces are arranged at equal intervals and bonded together, and an insulative filler is enclosed in a metal case and then sealed.
（作用） 上記の構成を具えるので、板パツキンと絶縁板の間に
挾持される電極板上のブロツク素子は１枚の圧電素子を
等分割し、これらを均等間隔に配置することができるた
め、均一な出力を行なうことができる上、従来歩留りの
低くかつた成形においても１枚の素子から多数分割して
とることができ、コストを低減できるものであり、製造
時（組付時）又は取付時において、部分的負荷に対して
もその耐衝撃性を強化することができる。(Operation) Since the block element on the electrode plate sandwiched between the plate packing and the insulating plate has the above-mentioned configuration, one piezoelectric element can be equally divided, and these elements can be arranged at equal intervals. In addition to high output, it is possible to divide a single element into a large number of parts even in the case of molding with a low yield in the past, and it is possible to reduce the cost, and at the time of manufacturing (when assembling) or mounting. In, the impact resistance can be enhanced even with respect to a partial load.
（実施例） この発明を図に示す実施例により更に説明する。
（１）はこの考案の実施例であるガスケツト型圧力セン
サーであり、受圧する部分を内封したケース（２）と信
号伝達を行うリード線（９）を内蔵する保護管（３）を
具え、中央に上記圧力センサー（１）を固定するための
貫通孔（４）が設けられて環状となつている。この圧力
センサー（１）は、第２図に示すように環状の板パツキ
ン（５）、ブロツク素子（８）を軸心を中心とする同芯
円上の位置に等間隔に配置した電極板（６）、さらにセ
ラミツクなどの絶縁体（７）を積層したものを断面Ｕ字
形状の環状の金属ケース（２）中に配した後、金属ケー
ス（２）の内外先端部（2a）、（2a）をそれぞれ相対す
るように加締めて板パツキン（５）の内外周縁を押圧し
て固定されている。なお、圧電素子（８）の揺動を防止
するためにシリコンワニス等の接合剤によつて、電極板
（６）上に加圧接合してもよく、加圧接合するため圧電
素子（８）と電極板（６）との導通を充分確保すること
が可能となる。ここでブロツク素子（８）は、１枚の板
状の圧電素子を分割することにより多数の同形の素子
（８）としたものである。このため、１枚の圧電素子に
より多数の素子（８）を構成することができるととも
に、このガスケツト型圧力センサー（１）を測定個所に
固定すると、電極板（６）上に等間隔で配置したブロツ
ク素子（８）によつて、発生した圧力（第４図矢印方
向）が正確に測定され、リード線（９）を通して制御系
統に伝達される。また、このブロツク素子（８）を電極
板（６）上に等間隔に配置することにより、局部的に負
荷した圧力に対してもその強度が著しく向上し、より確
実な測定が可能となる。なお、ブロツク素子（８）の電
極板（６）上の配置は、図面のように６個に限るもので
はなく３個のブロツク素子（８）としても平均に圧力を
受けるように配置すればよいものである。また金属ケー
ス（２）への密封及び電極板（６）やリード線（９）の
絶縁を保持するために金属ケース（２）及び保護管
（３）内にシリコン樹脂等の絶縁性充填材（10）が封入
されている。(Example) The present invention will be further described with reference to an example shown in the drawings.
(1) is a gasket type pressure sensor according to an embodiment of the present invention, which includes a case (2) in which a pressure receiving portion is enclosed and a protective tube (3) having a lead wire (9) for transmitting a signal, A through hole (4) for fixing the pressure sensor (1) is provided in the center to form an annular shape. As shown in FIG. 2, the pressure sensor (1) includes an electrode plate (5) and a block element (8), which are annular plates and are arranged at equal intervals on a concentric circle centered on the axis. 6), and further laminating an insulator (7) such as ceramics is placed in an annular metal case (2) having a U-shaped cross section, and then the inner and outer tips (2a), (2a) of the metal case (2) ) Are crimped so as to face each other, and the inner and outer peripheral edges of the plate packing (5) are pressed and fixed. The piezoelectric element (8) may be pressure-bonded onto the electrode plate (6) with a bonding agent such as silicon varnish in order to prevent the piezoelectric element (8) from being rocked. It is possible to ensure sufficient electrical continuity between the electrode plate and the electrode plate (6). Here, the block element (8) is a large number of elements (8) of the same shape formed by dividing one plate-shaped piezoelectric element. For this reason, a large number of elements (8) can be formed by one piezoelectric element, and when the gasket type pressure sensor (1) is fixed at the measurement point, it is arranged on the electrode plate (6) at equal intervals. The generated pressure (in the direction of the arrow in FIG. 4) is accurately measured by the block element (8) and transmitted to the control system through the lead wire (9). Further, by arranging the block elements (8) on the electrode plate (6) at equal intervals, the strength thereof is remarkably improved even with respect to the locally applied pressure, and more reliable measurement becomes possible. Incidentally, the arrangement of the block elements (8) on the electrode plate (6) is not limited to six as shown in the drawing, and three block elements (8) may be arranged so as to receive an average pressure. It is a thing. In addition, in order to seal the metal case (2) and maintain the insulation of the electrode plate (6) and the lead wire (9), an insulating filler (such as silicon resin) inside the metal case (2) and the protective tube (3) ( 10) is enclosed.
（発明の効果） 以上のとおり、内燃機関等から発生する圧力を検知す
る圧電素子を、環状のものに代えブロツク素子を等間隔
に配置するものとしたため、１枚の圧電素子を有効に使
用でき、その製作を容易とし、さらにその歩留りを向上
させることによつてコストを低減させ、また、圧電素子
自体の強度を増大させることのできる優れた効果をもつ
ものである。(Effects of the Invention) As described above, since the piezoelectric elements for detecting the pressure generated from the internal combustion engine or the like are replaced with the block elements at equal intervals instead of the annular element, one piezoelectric element can be effectively used. The production of the piezoelectric element is facilitated, and the yield is improved, so that the cost can be reduced and the strength of the piezoelectric element itself can be increased.
第１図は、この発明の実施例の全体斜視図、第２図は、
圧力センサー組付け用の分解斜視図、第３図は電極板の
上方よりの正面図、さらに第４図は第１図のＩ−Ｉ断面
図である。 １……ガスケツト型圧力センサー、２……ケース、３…
…リード線、４……貫通孔、５……板パツキン、６……
電極板、７……絶縁板、８……ブロツク素子。FIG. 1 is an overall perspective view of an embodiment of the present invention, and FIG. 2 is
FIG. 3 is an exploded perspective view for assembling the pressure sensor, FIG. 3 is a front view of the electrode plate from above, and FIG. 4 is a sectional view taken along the line II of FIG. 1 ... Gasket type pressure sensor, 2 ... Case, 3 ...
… Lead wire, 4 …… through hole, 5 …… plate packing, 6 ……
Electrode plate, 7 ... Insulation plate, 8 ... Block element.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭53−16614（ＪＰ，Ａ) 実開 昭61−114343（ＪＰ，Ｕ) 特公 昭58−27459（ＪＰ，Ｂ２) 特公 昭60−26239（ＪＰ，Ｂ２) ─────────────────────────────────────────────────── ───Continued from the front page (56) References JP-A-53-16614 (JP, A) Sekikai-61-114343 (JP, U) JP-B 58-27459 (JP, B2) JP-B Sho- 60- 26239 (JP, B2)
Claims (1)
極板上に、圧電素子を分割して形成するブロック素子を
軸心を中心とする同芯円上の位置に３個以上を等間隔に
なるように配置して接着した上、それらを金属製ケース
内に絶縁性充填材を封入し、内封してなるガスケット型
圧力センサー。1. A block element formed by dividing a piezoelectric element on an electrode plate sandwiched between an annular plate packing and an insulating plate, and three or more block elements are formed on a concentric circle centered on the axis. A gasket-type pressure sensor that is placed and bonded at intervals so that they are sealed with an insulative filler in a metal case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62068926A JPH087105B2 (en) | 1987-03-25 | 1987-03-25 | Gasket type pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62068926A JPH087105B2 (en) | 1987-03-25 | 1987-03-25 | Gasket type pressure sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63235841A JPS63235841A (en) | 1988-09-30 |
| JPH087105B2 true JPH087105B2 (en) | 1996-01-29 |
Family
ID=13387746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62068926A Expired - Fee Related JPH087105B2 (en) | 1987-03-25 | 1987-03-25 | Gasket type pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH087105B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150226641A1 (en) * | 2012-08-29 | 2015-08-13 | Citizen Holdings Co., Ltd. | Combustion pressure sensor |
| JPWO2014034641A1 (en) * | 2012-08-30 | 2016-08-08 | シチズンファインデバイス株式会社 | Pressure detection device |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT503664B1 (en) * | 2006-04-13 | 2007-12-15 | Piezocryst Advanced Sensorics | PIEZOELECTRIC PRESSURE SENSOR |
| WO2007128149A1 (en) * | 2006-05-04 | 2007-11-15 | Kistler Holding Ag | Piezoelectric measuring element with transverse effect and sensor comprising such a measuring element |
| WO2012131788A1 (en) * | 2011-03-31 | 2012-10-04 | シチズンファインテックミヨタ株式会社 | Cylinder internal-pressure sensor for engine |
| WO2014050999A1 (en) * | 2012-09-27 | 2014-04-03 | シチズンファインテックミヨタ株式会社 | Functional component unit having combustion pressure sensor for internal combustion engine |
| CN110954259A (en) * | 2019-11-27 | 2020-04-03 | 同济大学 | Gasket sensor based on optical fiber microbend loss |
| CN117571187B (en) * | 2023-11-14 | 2025-03-07 | 希蒙电子国际有限公司 | Elastomer strain structure for load sensor |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5316614A (en) * | 1976-07-30 | 1978-02-15 | Kawai Musical Instr Mfg Co | Pickup |
| JPS5827459A (en) * | 1981-08-12 | 1983-02-18 | Fuji Xerox Co Ltd | Fitting and adjusting device for reading element |
| JPS6026239A (en) * | 1983-07-21 | 1985-02-09 | Osaka Gas Co Ltd | Hot-water supply system with automatic bath function |
| JPS61114343U (en) * | 1984-12-28 | 1986-07-19 |
-
1987
- 1987-03-25 JP JP62068926A patent/JPH087105B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150226641A1 (en) * | 2012-08-29 | 2015-08-13 | Citizen Holdings Co., Ltd. | Combustion pressure sensor |
| US9841356B2 (en) * | 2012-08-29 | 2017-12-12 | Citizen Finedevice Co., Ltd. | Combustion pressure sensor |
| JPWO2014034641A1 (en) * | 2012-08-30 | 2016-08-08 | シチズンファインデバイス株式会社 | Pressure detection device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63235841A (en) | 1988-09-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |