JPH03214063A - acceleration detector - Google Patents
acceleration detectorInfo
- Publication number
- JPH03214063A JPH03214063A JP1087390A JP1087390A JPH03214063A JP H03214063 A JPH03214063 A JP H03214063A JP 1087390 A JP1087390 A JP 1087390A JP 1087390 A JP1087390 A JP 1087390A JP H03214063 A JPH03214063 A JP H03214063A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic body
- acceleration
- case
- movable magnetic
- secondary coil
- 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.)
- Granted
Links
- 230000001133 acceleration Effects 0.000 title claims description 36
- 238000006073 displacement reaction Methods 0.000 claims description 5
- 230000004907 flux Effects 0.000 description 15
- 230000007423 decrease Effects 0.000 description 6
- 238000001514 detection method Methods 0.000 description 6
- 239000000696 magnetic material Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000035945 sensitivity Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、自動車等、移動体の加減速度を検出するた
めの加速度検出器に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an acceleration detector for detecting acceleration/deceleration of a moving body such as an automobile.
周知の加速度検出器の中に、加速度によって移動する磁
性体の動きを差動トランスで検出するものがある。Among well-known acceleration detectors, there is one that uses a differential transformer to detect the movement of a magnetic body that moves due to acceleration.
第４図にその一例を示す、この差動トランス型加速度検
出器４１は、図中Ａ方向の加速度が印加されると、仮ば
ね４３ａ、４３ｂに支持されている磁性体４４が各板ば
ねを弾性変形させて図中Ｂ方向に移動する。その移動で
磁性体４４０図中右側の２次コイル４？ｂ内に存在する
部分の長さが左側の２次コイル４？ａ内に存在する部分
の長さより長くなって２次コイル４？ａ、４？ｂの誘導
電圧に差が生じ、この差によって加速度が検出される。In this differential transformer type acceleration detector 41, an example of which is shown in FIG. It is elastically deformed and moved in the direction B in the figure. With that movement, the magnetic body 440 secondary coil 4 on the right side of the diagram? Is the length of the part existing in b the left secondary coil 4? Is the secondary coil 4 longer than the length of the part that exists inside a? a, 4? A difference occurs in the induced voltage of b, and acceleration is detected based on this difference.
図中、４６は１次コイル、４２はケースである。In the figure, 46 is a primary coil, and 42 is a case.
なお、この種の検出器の具体的な従来例としては、実開
昭５９−９５２６６号公報に示されるものなどがある。Note that a specific conventional example of this type of detector is shown in Japanese Utility Model Application Laid-Open No. 59-95266.
この種の検出器は、微小な加速度に対しては磁性体が微
蓋しか動かないので２次コイル間に明確な電圧差が発生
せず、従って、検出感度が悪いと云う難点がある。This type of detector has the disadvantage that the magnetic body moves only slightly in response to minute accelerations, so no clear voltage difference is generated between the secondary coils, and therefore the detection sensitivity is poor.
また、磁性体を仮ばねで懸架している場合には、過度な
加速度が印加されると仮ばねが永久変形を起こしたり破
壊されるなどの問題がある。Further, when a magnetic body is suspended by a temporary spring, there is a problem that the temporary spring may be permanently deformed or destroyed if excessive acceleration is applied.
さらに、２次コイルと磁性体の相対位置変化で電圧差を
／ｌさ−けるので、高い位置決め精度が・政求され、調
整に手間取るなどして組立能率が下がり、組立費も高く
なると云う問題もある。Furthermore, since the voltage difference is calculated by changing the relative position of the secondary coil and the magnetic material, high positioning accuracy is required, which reduces assembly efficiency and increases assembly costs due to time-consuming adjustments. There is also.
この発明は、これ等の諸問題を無（した差動トランス型
の加速度検出器を提供しようとするものである。The present invention aims to provide a differential transformer type acceleration detector that is free from these problems.
この発明は、上記の課題を解決するため、加速度に応し
て移動する可動磁性体を板ばねで支持し、この可動磁性
体の移動方向両側に磁性体のケース又はケースで支持し
た固定磁性体を所定の隙間を保って配置し、かつ、上記
可動磁性体の外周にト記トランスの１次コイルと２次コ
イルを配置する。In order to solve the above-mentioned problems, this invention supports a movable magnetic body that moves according to acceleration with a leaf spring, and fixed magnetic bodies supported by magnetic cases or cases on both sides of the movable magnetic body in the direction of movement. are arranged with a predetermined gap maintained between them, and the primary coil and secondary coil of the transformer described in (G) are arranged around the outer periphery of the movable magnetic body.
なお、可動磁性体の両側に固定磁性体を配置する場合に
は、ケースを［性体で形成することができる。Note that when fixed magnetic bodies are arranged on both sides of the movable magnetic body, the case can be made of a magnetic body.
また、トランスの１次コイルと２次コイルを中心対称位
置に２組設け、その２組の：１イル間に磁性体のヨーク
を配置することは史なる高感度化の而で好ましいことで
ある。In addition, it is preferable to provide two sets of the primary and secondary coils of the transformer in centrally symmetrical positions, and to place a magnetic yoke between the two sets of coils in order to achieve high sensitivity. .
１次コイルによって発生した磁束は、可動磁性体を伝っ
て２次コイルに達し、２次コイルに電圧が誘起される。The magnetic flux generated by the primary coil reaches the secondary coil through the movable magnetic body, and a voltage is induced in the secondary coil.
このときの誘導電圧の大きさは、２次コイル内を通過す
る磁束の量によって決まり、また、その２次コイル内磁
束通過量は、１次コイルと２次コイル間に存在する磁気
回路の磁気砥ｌｊＬ値によって決まるが、この発明では
加速度が変化しても可動磁性体と２次コイルの相対変位
が起こらず、従って、回路中の全磁気抵抗が大巾に減少
し、また、可動磁性体の両側に設けたギヤノブ（隙間）
が変化して可動磁性体の変位置に対する磁束変化を大き
く°４る働きをするので検出感度が向上する。The magnitude of the induced voltage at this time is determined by the amount of magnetic flux passing through the secondary coil, and the amount of magnetic flux passing through the secondary coil is determined by the magnetic flux of the magnetic circuit that exists between the primary coil and the secondary coil. Although it is determined by the grinding ljL value, in this invention, even if the acceleration changes, relative displacement between the movable magnetic body and the secondary coil does not occur. Therefore, the total magnetic resistance in the circuit is greatly reduced, and the movable magnetic body Gear knobs (gap) provided on both sides of
The change in the magnetic flux greatly reduces the change in magnetic flux due to the position of the movable magnetic body, thereby improving detection sensitivity.
即ち、加速度が生して可動磁性体が一端側に移動すると
、可動磁性体とその端面に対向した磁性体ケース又は固
定磁性体との間のギヤノブは一端側で縮小し、他端側で
拡大する。そのため、一端側ではギヤノブによる磁気抵
抗が減少して当該部の磁束１ｌＩｌ）ＰＪ菫が従来の構
造に比してより多くなり、他端側ではギヤ、プによる磁
気抵抗が増大して上記とは逆の現象が１−シる。この一
端側と他端側における磁束浦過量の増減作用により、通
過磁束に誘起される２次コイルの電圧にも従来以−１，
の大きな差が生じ、従って、この差を測定すれば微小加
速度の検出も可能となる。In other words, when the movable magnetic body moves toward one end due to acceleration, the gear knob between the movable magnetic body and the magnetic case or fixed magnetic body facing the end surface contracts at one end and expands at the other end. do. Therefore, on one end side, the magnetic resistance due to the gear knob decreases, and the magnetic flux 1lIl)PJ violet in that part increases compared to the conventional structure, and on the other end side, the magnetic resistance due to the gear and PJ increases, which is different from the above. The opposite phenomenon occurs. Due to this effect of increasing and decreasing the amount of magnetic flux at one end and the other end, the voltage of the secondary coil induced by the passing magnetic flux also decreases by 1, compared to the conventional one.
A large difference occurs, and therefore, by measuring this difference, it becomes possible to detect minute accelerations.
このように、この発明の検出器の検出原理は、可動磁性
体と２次コイルとの相対位置変化によって２つの２次コ
イル間に誘導電圧差を生しさせる従来の検出器と違って
、可動磁性体の両側でのギャップ差によって電圧差（検
出器出力）を生しさせるため、コイルと可動磁性体の相
対位置精度の確保が不要である。また、２つの磁気回路
における全磁気抵抗も減少するので、微小な磁気抵抗の
変化に対する検出感度が高まり、加速度対比での出力電
圧が非常に大きくなる。As described above, the detection principle of the detector of the present invention is that, unlike conventional detectors in which an induced voltage difference is generated between two secondary coils due to a change in the relative position between the movable magnetic body and the secondary coil, Since a voltage difference (detector output) is generated by the gap difference on both sides of the magnetic body, it is not necessary to ensure relative positional accuracy between the coil and the movable magnetic body. Furthermore, since the total magnetic resistance in the two magnetic circuits is also reduced, the detection sensitivity to minute changes in magnetic resistance is increased, and the output voltage relative to acceleration becomes extremely large.
このほか、ケース又はこれで支持した固定磁性体がスト
ッパとなって可動磁性体の過度な動きを制限するので、
仮ばねに無理な何重が加わるごともない。In addition, the case or the fixed magnetic body supported by it acts as a stopper and limits excessive movement of the movable magnetic body.
There is no need to apply too many layers to the temporary spring.
（実施例）
第１図に第１実施例の概要を示す。この加速度検出器１
は、磁性体で作ったケース２に板ばね３ａ、３ｂの一端
を固定し、この板ばねの他端、即ち自由端に所定装置の
可動磁性体４を同着しである。また、可動磁性体４の両
側には、ケース２の内面に一体に形成した凸部２ａ、２
ｂを所定のギャップを保って対向させ、コイル６ａ、６
ｂ間にはケースと一体のヨーク２ｃを配置しである。(Example) FIG. 1 shows an outline of the first example. This acceleration detector 1
In this case, one end of leaf springs 3a, 3b is fixed to a case 2 made of a magnetic material, and a movable magnetic material 4 of a predetermined device is attached to the other end, ie, the free end, of the leaf spring. Further, on both sides of the movable magnetic body 4, there are convex portions 2a, 2 formed integrally on the inner surface of the case 2.
b facing each other with a predetermined gap, and the coils 6a, 6
A yoke 2c, which is integrated with the case, is arranged between the yoke 2c and the case.
さらに、可動磁性体４の外周には、磁束を発生させる１
次コイル６ａ、６ｂと、磁束の変化を検出する２次コイ
ル７ａ、７ｂをケースで支えて同心的に設置しである。Further, on the outer periphery of the movable magnetic body 4, a 1
The secondary coils 6a and 6b and the secondary coils 7a and 7b for detecting changes in magnetic flux are supported by a case and installed concentrically.
以上の如く構成した第１実施例の検出器は、移動体の加
減速時に可動磁性体４に対し、その質蓋をＭとするとＦ
＝Ｍ−Ｇなる力が加わる。この力Ｆは、板ばね３の弾性
力と均衡する位置まで仮ばねを弾性変形させて可動磁性
体４を変位させる。The detector of the first embodiment configured as described above detects F
= MG force is added. This force F elastically deforms the temporary spring to a position balanced with the elastic force of the leaf spring 3, thereby displacing the movable magnetic body 4.
この際の変位量は、板ばね３のばね定数と可動磁性体４
のｆｆＭＭが一定であるなら加速度Ｇに比例し、従って
、凸部２ａ、２ｂと可動磁性体４との間のギャップも加
速度Ｇに比例して変化する。The amount of displacement at this time is determined by the spring constant of the leaf spring 3 and the movable magnetic body 4.
If ffMM is constant, it is proportional to the acceleration G, and therefore, the gap between the convex parts 2a, 2b and the movable magnetic body 4 also changes in proportion to the acceleration G.
このギャップの変化は、今、仮に加速度検出器１に対し
て図中入方向の加速度が加わったとすると、可動磁性体
４はＢ方向に移動するので、凸部２ｂ側で減少し、凸部
２ａ側で増大する。そのため、凸部２ｂ側ではこの凸部
と磁性体４との間の磁束移動がスムーズになって１次コ
イル６ｂから２次コイル７ｂへの磁束伝達量が増加し、
２次コイルに加速度０時よりも大きな電圧が誘起される
。Assuming that acceleration is applied to the acceleration detector 1 in the direction shown in the figure, the movable magnetic body 4 moves in the direction B, so the change in the gap decreases on the convex portion 2b side, and the gap decreases on the convex portion 2a side. Increases on the side. Therefore, on the convex portion 2b side, the magnetic flux movement between the convex portion and the magnetic body 4 becomes smooth, and the amount of magnetic flux transmitted from the primary coil 6b to the secondary coil 7b increases.
A larger voltage is induced in the secondary coil than when the acceleration is zero.
一方、凸部２ａ側ではギャップの増大により磁気抵抗が
大きくなるため、２次コイル７ａ内を通過する磁束が減
少して出力電圧も小さくなる。そして、このときの２次
コイル出力は、前述の作用によって７ｂのそれが従来以
上に大きくなり、７ａのそれは従来以下に小さくなる。On the other hand, on the convex portion 2a side, the magnetic resistance increases due to the increase in the gap, so the magnetic flux passing through the secondary coil 7a decreases, and the output voltage also decreases. At this time, the secondary coil output of 7b becomes larger than before, and that of 7a becomes smaller than before, due to the above-mentioned effect.
従って、加速度対比での両コイルの出力差も従来に比し
て当然に大きくなり、このために、高感度検出が望める
ようになる。Therefore, the output difference between the two coils in relation to acceleration is naturally larger than in the conventional case, and therefore, high sensitivity detection can be expected.
また、今、図中Ａ方向に作用する加速度が過大であった
とすると、可動磁性体４は凸部２ｂに当ってそれ以上の
移動が阻止される。従って、過大加速度による板ばね３
の過度の撓みも起こらず、板ばねの永久変形、破損の問
題も無くなる。Furthermore, if the acceleration acting in the direction A in the figure is excessive, the movable magnetic body 4 hits the convex portion 2b and is prevented from moving further. Therefore, leaf spring 3 due to excessive acceleration
Excessive deflection does not occur, and the problem of permanent deformation or breakage of the leaf spring is eliminated.
第２図は、第２実施例の概略構成図である。この加速度
検出器１１は、第１実施例と同様の構成を持ち、同様の
働きをする。但し、ケース１２を非磁性体で形成したこ
と、そのケースで固定磁性体１５ａ、１５ｂを支持して
可動磁性体１４の両側に対向配置したこと、及びコイル
１６ａ、１６５間のヨーク１８もケースとは別体のもの
をケースで支持して設けたことは第１実施例と相違して
いる。このように、ケース全体を非磁性体で作ると、ヨ
ークを用いたとしても回路全体の磁気抵抗が増大する反
面、検出器の重量軽減が計れる。FIG. 2 is a schematic diagram of the second embodiment. This acceleration detector 11 has a configuration similar to that of the first embodiment and functions similarly. However, the case 12 is made of a non-magnetic material, the fixed magnetic bodies 15a and 15b are supported by the case and are placed opposite to each other on both sides of the movable magnetic body 14, and the yoke 18 between the coils 16a and 165 is also made of a case. This differs from the first embodiment in that it is a separate piece supported by a case. In this way, when the entire case is made of non-magnetic material, even if a yoke is used, the magnetic resistance of the entire circuit increases, but on the other hand, the weight of the detector can be reduced.
第３図は、この発明の第３実施例の概略構成図である。FIG. 3 is a schematic diagram of a third embodiment of the present invention.
この検出器２１も第１実施例と同様の構成を持ち、同様
の働きをするが、１次コイル２６ａ、 ２５ｂを２次コ
イル２？ａ、２？ｂ上に積層配置したこと、コイル間の
ヨークを省略したこと、板ばね２３を１枚にしたこと、
ケース内面の凸部を無くしてケース壁を直接可動磁性体
２４に対向させたことは第１実施例と異なる。この第３
実施例は、第１実施例に比しで出力が低下するが、可動
磁性体の変位量を大きく確保し易い、また、コイルの巻
き幅が狭くなるので、加速度の作用する方向の設置スペ
ースを確保し難いときに有利である。This detector 21 also has the same configuration as the first embodiment and functions in the same way, but the primary coils 26a and 25b are replaced by the secondary coil 2? a.2? B, the yoke between the coils is omitted, the number of leaf springs 23 is reduced to one,
This embodiment differs from the first embodiment in that the convex portion on the inner surface of the case is eliminated and the case wall directly faces the movable magnetic body 24. This third
Although the output of this embodiment is lower than that of the first embodiment, it is easier to ensure a large amount of displacement of the movable magnetic body, and the winding width of the coil is narrower, so the installation space in the direction of acceleration is reduced. This is advantageous when it is difficult to secure.
以上述べたように、この発明の加速度検出器は、可動磁
性体の移動方向両側に磁性体のケース又はケースに支持
される固定磁性体を所定の間隔をあけて配置し、また、
１次及び２次コイルは可動磁性体の外周に配置し、可動
磁性体と上記磁性体ケース又は固定磁性体との間のギャ
ップ差で２次コイル内を通過する磁束量を変化させるよ
うにしたので、可動磁性体と２次コイルの相対位置変化
で差電圧を生しさせる従来の検出器と違って、可動磁性
体の変位量に対する磁束変化、つまりは差電圧（出力）
が大きくなり、高感度検出が望めるようになる。As described above, the acceleration detector of the present invention has a magnetic case or a fixed magnetic body supported by the case arranged at a predetermined interval on both sides of the movable magnetic body in the moving direction, and
The primary and secondary coils are arranged around the outer periphery of the movable magnetic body, and the amount of magnetic flux passing through the secondary coil is changed by the gap difference between the movable magnetic body and the magnetic body case or the fixed magnetic body. Therefore, unlike conventional detectors that generate a differential voltage due to changes in the relative position of the movable magnetic body and the secondary coil, the change in magnetic flux with respect to the amount of displacement of the movable magnetic body, that is, the differential voltage (output)
becomes large, and high-sensitivity detection can be expected.
また、両側のストツパが可動磁性体の過度な動きを制限
するので、仮ばねの過剰な撓みを無くしてその板ばねの
永久変形、破壊も防止することができる。Further, since the stoppers on both sides restrict excessive movement of the movable magnetic body, excessive deflection of the temporary spring can be eliminated and permanent deformation and destruction of the leaf spring can be prevented.
さらに、上述したように、ケース又は固定磁性体との間
のギャップ差を利用して差電圧を生じさせるので、各種
部品の位置決めも容易になる。即ち、一般にコイルは樹
脂製ボビンに巻かれているので寸法精度が悪い、従って
、従来方式によれば可動磁性体とコイルの相対位置精度
がどうしても悪くなる。しかし、この発明の構造では、
ギヤフブ精度が高精度加工の可能な金属加工品の組合せ
で決まり、また、そのギャップによって出力が決まるの
で、組立時の位置決めは上述したように容易である。Furthermore, as described above, since a differential voltage is generated using the gap difference between the case and the fixed magnetic body, positioning of various parts becomes easy. That is, since the coil is generally wound around a resin bobbin, its dimensional accuracy is poor.Therefore, in the conventional method, the relative positional accuracy between the movable magnetic body and the coil inevitably becomes poor. However, in the structure of this invention,
Since the gear hub accuracy is determined by the combination of metal workpieces that can be processed with high precision, and the output is determined by the gap, positioning during assembly is easy as described above.
このほかケース本体の少なくとも＆１１１Ｐｉ構成部を
磁性体で形成する場合、或いはコイル間にヨークを設置
する場合には、磁気回路中の磁気抵抗が更に小さくなる
ので、出力アノブが計れる。In addition, when at least the &111Pi component of the case body is formed of a magnetic material, or when a yoke is installed between the coils, the magnetic resistance in the magnetic circuit is further reduced, so that the output angle can be measured.
従って、この発明によれば小型でも高感度積出かり能と
なり、また、過大加速度、衝撃等に対する信顛性も増し
、さらに、製造も容易になってコスト削減も計れると云
う効果が得られる。Therefore, according to the present invention, it is possible to achieve high-sensitivity loading and unloading despite being compact, and the reliability against excessive acceleration, impact, etc. is increased, and furthermore, manufacturing is facilitated and costs can be reduced.
第１図は、この発明の加速度検出器の一実施例を示す概
略構成図、第２図及び第３図は他の実施例の概略構成図
、第４図は従来の差動トランス型加速度検出器を示す図
である。
１．１１．２１・・・・・・加速度検出器、２．１２．
２２・・・・・・ケース、
３ａ、３ｂ、１３ａ、１３ｂ、２３・・・・・・板ばね
、４．１４．２４・・・・・・可動磁性体、２ａ、２ｂ
・−・・−・凸部、 ２Ｃ１１８・・・・・・ヨーク、
６ａ、６ｂ、１１．１６ｂ、２６ａ、２６ｂ−・・１次
コイル、
７ａ、７ｂ、１７ａ、１７ｂ、２？ａ、２７ ｂ ・・
・２次コイル、
１５ａ、１５ｂ・・・・・・固定磁性体。FIG. 1 is a schematic configuration diagram showing one embodiment of the acceleration detector of the present invention, FIGS. 2 and 3 are schematic configuration diagrams of other embodiments, and FIG. 4 is a conventional differential transformer type acceleration detector. FIG. 1.11.21... Acceleration detector, 2.12.
22... Case, 3a, 3b, 13a, 13b, 23... Leaf spring, 4.14.24... Movable magnetic body, 2a, 2b
・・・・・・・Convex part, 2C118・・・Yoke,
6a, 6b, 11.16b, 26a, 26b--Primary coil, 7a, 7b, 17a, 17b, 2? a, 27 b...
・Secondary coil, 15a, 15b...Fixed magnetic body.
Claims (2)
トランスの２次コイル間に出力差を生じさせて加速度を
検出する加速度検出器において、上記可動磁性体を板ば
ねで支持し、この可動磁性体の移動方向両側に磁性体の
ケース又はケースで支持した固定磁性体を所定の隙間を
保って配置し、かつ、上記可動磁性体の外周に上記トラ
ンスの１次コイルと２次コイルを配置したことを特徴と
する加速度検出器。(1) In an acceleration detector that detects acceleration by generating an output difference between secondary coils of a differential transformer by displacement of a movable magnetic body that moves in response to acceleration, the movable magnetic body is supported by a leaf spring, A magnetic case or a fixed magnetic body supported by a case are arranged with a predetermined gap on both sides of the movable magnetic body in the direction of movement, and the primary coil and secondary coil of the transformer are arranged around the outer periphery of the movable magnetic body. An acceleration detector characterized by arranging.
称位置に２組設け、その２組のコイル間に磁性体のヨー
クを配置した請求項（１）記載の加速度検出器。(2) The acceleration detector according to claim (1), wherein two sets of the primary coil and the secondary coil of the transformer are provided in centrally symmetrical positions, and a magnetic yoke is arranged between the two sets of coils.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1087390A JP2702582B2 (en) | 1990-01-18 | 1990-01-18 | Acceleration detector |
| DE69102888T DE69102888T2 (en) | 1990-01-10 | 1991-01-02 | Acceleration sensor. |
| EP91100037A EP0437195B1 (en) | 1990-01-10 | 1991-01-02 | Acceleration detector |
| US07/639,063 US5220834A (en) | 1990-01-10 | 1991-01-09 | Acceleration detector with differential transformer |
| KR1019910000186A KR910014709A (en) | 1990-01-10 | 1991-01-09 | Acceleration detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1087390A JP2702582B2 (en) | 1990-01-18 | 1990-01-18 | Acceleration detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03214063A true JPH03214063A (en) | 1991-09-19 |
| JP2702582B2 JP2702582B2 (en) | 1998-01-21 |
Family
ID=11762456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1087390A Expired - Lifetime JP2702582B2 (en) | 1990-01-10 | 1990-01-18 | Acceleration detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2702582B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5359894A (en) * | 1991-03-15 | 1994-11-01 | Sumitomo Electric Industries, Ltd. | Acceleration detector having highly accurate gaps in magnetic circuit including a differential transformer |
-
1990
- 1990-01-18 JP JP1087390A patent/JP2702582B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5359894A (en) * | 1991-03-15 | 1994-11-01 | Sumitomo Electric Industries, Ltd. | Acceleration detector having highly accurate gaps in magnetic circuit including a differential transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2702582B2 (en) | 1998-01-21 |
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