JP2003057078A - Sensor and bearing apparatus with the sensor - Google Patents
Sensor and bearing apparatus with the sensorInfo
- Publication number
- JP2003057078A JP2003057078A JP2001242719A JP2001242719A JP2003057078A JP 2003057078 A JP2003057078 A JP 2003057078A JP 2001242719 A JP2001242719 A JP 2001242719A JP 2001242719 A JP2001242719 A JP 2001242719A JP 2003057078 A JP2003057078 A JP 2003057078A
- Authority
- JP
- Japan
- Prior art keywords
- sensor
- detection unit
- circuit
- shield
- circuit component
- 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.)
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- Details Of Measuring And Other Instruments (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、外部ノイズの多い
環境下で使用される機械装置、鉄道車両や自動車などの
車両の軸受装置あるいはギヤボックスなどに取付けられ
るセンサ及びこのセンサを備えるセンサ付軸受装置に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanical device used in an environment with a lot of external noise, a sensor mounted on a bearing device of a vehicle such as a railroad car or an automobile or a gear box, and a sensor-equipped bearing including the sensor. Regarding the device.
【０００２】[0002]
【従来の技術】機械装置などの産業機械や、鉄道車両や
自動車などの車両の軸受装置あるいはギヤボックスなど
には、保全のためにその振動や温度あるいは回転速度な
どを検出するセンサが取付けられる場合がある。このよ
うなセンサは、振動や温度あるいは回転速度などを検出
し電気信号で出力する検出部や、この検出部が検出した
信号を有意義な情報信号に処理する電子部品などが実装
された回路基板を備えている。また、取扱いをよくする
ために、この回路基板を金属製のケースに入れて軸受や
その軸受が設けられたハウジングなどに固定する。2. Description of the Related Art When a sensor for detecting vibration, temperature, rotational speed or the like is attached to a bearing device or a gearbox of an industrial machine such as a mechanical device or a vehicle such as a railroad vehicle or an automobile for maintenance. There is. Such a sensor is a detection unit that detects vibration, temperature, rotation speed, etc. and outputs it as an electric signal, and a circuit board on which an electronic component that processes the signal detected by this detection unit into a meaningful information signal is mounted. I have it. In order to facilitate handling, the circuit board is put in a metal case and fixed to a bearing or a housing provided with the bearing.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、産業機
械や車両の軸受装置などが使用される環境では、高周波
電源や電気モータなどから発生する外部ノイズが、セン
サを構成する回路に影響し、センサの出力信号の精度や
分解能が低下することがある。また、機器のハウジング
を介して交流電源のアース接地が行われている機器にセ
ンサを取付けて使用する場合、ハウジングのアース接地
が不完全であると、ハウジングに固定されているセンサ
のケースにも交流電源の電圧が印加される。それに伴い
微弱電流がセンサに流れ、電源の周波数に起因するノイ
ズがセンサの出力信号に入ることがある。However, in an environment where a bearing device of an industrial machine or a vehicle is used, external noise generated from a high frequency power source, an electric motor, or the like affects a circuit forming the sensor, and The accuracy and resolution of the output signal may decrease. In addition, when the sensor is attached to a device that is grounded by an AC power supply through the housing of the device and used, if the grounding of the housing is incomplete, the case of the sensor fixed to the housing will also be affected. The voltage of the AC power supply is applied. As a result, a weak current flows through the sensor, and noise resulting from the frequency of the power supply may enter the output signal of the sensor.
【０００４】この場合、外部ノイズは、フィルタや演算
処理によってある程度その影響を減らすことができる
が、完全には取除くことは難しい。In this case, the effect of external noise can be reduced to some extent by a filter or arithmetic processing, but it is difficult to completely remove it.
【０００５】そこで、本発明は、センサの出力信号に影
響する外部ノイズを効果的に遮断するセンサ、及びこの
センサを備えて軸受の状態を精度よく監視することので
きるセンサ付軸受装置を提供することを目的とする。Therefore, the present invention provides a sensor that effectively blocks external noise that affects the output signal of the sensor, and a bearing device with a sensor that is equipped with this sensor and that can accurately monitor the state of the bearing. The purpose is to
【０００６】[0006]
【課題を解決するための手段】本発明のセンサは、検出
対象を検出する検出部と、この検出部で検出した信号を
処理する回路部品と、前記検出部と前記回路部品を実装
した回路基板と、この回路の基準電圧に接続して設けら
れたノイズ用シールドとを備える。A sensor according to the present invention comprises a detection section for detecting a detection target, a circuit component for processing a signal detected by the detection section, and a circuit board on which the detection section and the circuit component are mounted. And a noise shield provided by being connected to the reference voltage of this circuit.
【０００７】また、外部ノイズを効果的に遮断するため
に、回路基板の検出部と回路部品とを実装した面に検出
部と回路部品の少なくとも一部を囲んで環状に配置され
たノイズ用第１シールドと、回路基板の検出部と回路部
品とが実装された面と反対の面に、少なくとも前記第１
シールドで囲まれた領域を前記反対の面側から覆うよう
に前記領域と環状に対応して、面状に配置されたノイズ
用第２シールドとのうちの少なくともいずれか１つでシ
ールドを構成する。Further, in order to effectively block external noise, a noise first member is arranged annularly on the surface of the circuit board on which the detection unit and the circuit component are mounted so as to surround at least a part of the detection unit and the circuit component. At least the first shield on the surface opposite to the surface on which the detector and the circuit component of the circuit board are mounted.
A shield is constituted by at least one of the second noise shields arranged in a plane corresponding to the region so as to cover the region surrounded by the shield from the opposite surface side. .
【０００８】または、前記検出対象を検出する検出部
と、この検出部で検出した信号を処理する回路部品と、
この回路の基準電圧に接続され、回路基板の検出部と回
路部品を実装した面に検出部と回路部品の少なくとも一
部を囲んで環状に配置されたノイズ用第１シールドと、
回路の基準電圧に接続され、回路基板の検出部と回路部
品とが実装された面と反対側の面に、少なくとも第１シ
ールドで囲まれた領域を反対の面側から覆うように前記
領域と対抗して面状に配置されたノイズ用第２シールド
と、回路の基準電圧に接続されて回路基板の検出部と回
路部品とが実装された面に検出部と回路部品との内の少
なくともいずれか一方を覆って取付けられたケース状の
ノイズ用第３シールドとを備えるセンサとする。Alternatively, a detection unit for detecting the detection target, and a circuit component for processing a signal detected by the detection unit,
A first shield for noise, which is connected to the reference voltage of the circuit and is annularly arranged on the surface of the circuit board on which the detection unit and the circuit component are mounted so as to surround at least a part of the detection unit and the circuit component;
The area connected to the reference voltage of the circuit and on the surface opposite to the surface on which the detection unit and the circuit component of the circuit board are mounted, so as to cover at least the area surrounded by the first shield from the opposite surface side. At least one of the detection unit and the circuit component on the surface of the circuit board on which the second shield for noise arranged opposite to each other and the detection unit and the circuit component connected to the reference voltage of the circuit are mounted. A sensor having a case-shaped third noise shield attached so as to cover one of them.
【０００９】そして、振動や温度や軸受の回転速度また
は圧力の内の少なくともいずれか１つを測定するため
に、これら検出対象に応じて振動や温度や回転速度また
は圧力を測定する検出部を備える。Further, in order to measure at least one of the vibration, the temperature, the rotation speed or the pressure of the bearing, a detection unit for measuring the vibration, the temperature, the rotation speed or the pressure is provided according to the detection target. .
【００１０】または、回転輪と、固定輪と、転動体を有
する転がり軸受の、回転輪または固定輪の少なくともい
ずれか一方またはこれに取付けられた部材に前述のセン
サを取付けたセンサ付軸受装置とする。Alternatively, a bearing device with a sensor in which the above-mentioned sensor is attached to at least one of the rotating wheel and the fixed ring of a rolling bearing having a rotating wheel, a fixed wheel, and a rolling element, or a member attached to this. To do.
【００１１】[0011]
【発明の実施の形態】本発明の第１の実施形態につい
て、図１から図３を参照して説明する。図１に示す軸受
装置１は、２つの転がり軸受２と、これらの軸受２の固
定輪である外輪３を連結するハウジング４とを備えてお
り、回転輪となる内輪５で回転する軸６を支持してい
る。軸受装置１のハウジング４には、ハウジング４の外
面４ａと内面４ｂを連通する貫通孔７が設けられてお
り、センサ８が外側から挿入されてセンサ取付ねじ９で
固定されている。つまり、センサ８は、固定輪である外
輪３に固定した部材としてのハウジング４に取付けられ
ている。軸６の端部６ａには、軸６の回転速度を検出す
るための歯車１０が取り付けられている。センサ８の先
端８ａは、ハウジング４の内面４ｂから突出しており、
軸６の端部６ａに設けられた歯車１０の歯１０ａに近接
している。BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described with reference to FIGS. A bearing device 1 shown in FIG. 1 includes two rolling bearings 2 and a housing 4 that connects an outer ring 3 that is a fixed ring of these bearings 2, and a shaft 6 that rotates with an inner ring 5 that is a rotating ring. I support you. The housing 4 of the bearing device 1 is provided with a through hole 7 that communicates the outer surface 4a and the inner surface 4b of the housing 4, and the sensor 8 is inserted from the outside and fixed by the sensor mounting screw 9. That is, the sensor 8 is attached to the housing 4 as a member fixed to the outer ring 3 which is a fixed ring. A gear 10 for detecting the rotation speed of the shaft 6 is attached to the end 6a of the shaft 6. The tip 8a of the sensor 8 projects from the inner surface 4b of the housing 4,
It is close to the teeth 10a of the gear 10 provided at the end 6a of the shaft 6.
【００１２】図２及び図３に示すようにセンサ８は、振
動を検出する検出部である振動検出部１１と、温度を検
出する検出部である温度検出部１２と、軸６の回転速度
を検出する検出部である回転速度検出部１３と、これら
検出部１１，１２，１３で検出した信号を処理する回路
部品１４とを備えている。各検出部１１，１２，１３と
回路部品１４は、回路基板１５の一面１５ａに実装され
ている。回路基板１５は、図２に示すようにセンサケー
ス１６に収納し、センサケース１６との隙間を充填材１
７、例えばエポキシ樹脂などでモールドして固定する。As shown in FIGS. 2 and 3, the sensor 8 includes a vibration detecting section 11 which is a detecting section for detecting vibration, a temperature detecting section 12 which is a detecting section for detecting temperature, and a rotation speed of the shaft 6. A rotation speed detection unit 13 that is a detection unit that detects the rotation speed and a circuit component 14 that processes the signals detected by the detection units 11, 12, and 13 are provided. The detectors 11, 12, 13 and the circuit component 14 are mounted on one surface 15 a of the circuit board 15. The circuit board 15 is housed in the sensor case 16 as shown in FIG.
7. Mold and fix with, for example, epoxy resin.
【００１３】また、回路基板１５の一面１５ａには、図
３（ａ）に示すように回路部品１４を囲むように環状の
ノイズ用第１シールドとしての保護配線１８が設けられ
ている。この保護配線１８は、センサ８の基準電圧であ
るグランドに接地されているとともに、図３（ｂ）に示
すように前記一面１５ａから回路基板１５の他面１５ｂ
に貫通したスルーホール２０を介して前記他面１５ｂに
設けられた面状のノイズ用第２シールドとしての面状シ
ールド２１と接続されている。基準電圧はグランドの０
Ｖ以外にも任意の定電圧に設定可能である。面状シール
ド２１は、図３（ｃ）に示すように回路基板１５の他面
１５ｂをほぼ全面を覆うように設けられている。なお、
このスルーホール２０は、前記両面１５ａと１５ｂとを
導通可能に内壁２０ａを鍍金したものでもよいし、はと
めやジャンパー線などであってもよい。Further, on one surface 15a of the circuit board 15, as shown in FIG. 3 (a), an annular protective wiring 18 as a first noise shield is provided so as to surround the circuit component 14. The protective wiring 18 is grounded to the ground which is the reference voltage of the sensor 8 and, as shown in FIG. 3B, the one surface 15 a to the other surface 15 b of the circuit board 15.
It is connected to a planar shield 21 as a planar noise second shield provided on the other surface 15b through a through hole 20 penetrating therethrough. Reference voltage is 0 of ground
Any constant voltage other than V can be set. The planar shield 21 is provided so as to cover almost the entire other surface 15b of the circuit board 15 as shown in FIG. In addition,
The through hole 20 may be formed by plating the inner wall 20a so that the both surfaces 15a and 15b can be electrically connected to each other, or may be a spigot or a jumper wire.
【００１４】以上のように構成されたセンサ８は、回路
基板１５の一面１５ａに設けられた保護配線１８と他面
１５ｂに設けられた面状シールド２１によって、外部ノ
イズを効果的に遮断するので、センサ８の出力信号に影
響を及ぼす外部ノイズの重畳を減少させることができ
る。したがって、外部ノイズの混入が少なく、Ｓ／Ｎ比
が大きい信号を得られるので、センサ８の出力信号の精
度や分解能が向上する。The sensor 8 constructed as described above effectively shields external noise by the protective wiring 18 provided on one surface 15a of the circuit board 15 and the planar shield 21 provided on the other surface 15b. It is possible to reduce the superposition of external noise that affects the output signal of the sensor 8. Therefore, a signal with a small S / N ratio mixed with external noise can be obtained, so that the accuracy and resolution of the output signal of the sensor 8 are improved.
【００１５】次に、本発明の第２の実施形態について、
図４及び図５を参照して説明する。なお、第１の実施形
態と同様な構成については、同一の符号を付してその説
明を省略する。図４に示すセンサ２２は、振動検出部１
１と、この検出部１１の検出信号を処理する回路部品１
４とが回路基板２３の一面２３ａに実装されている。図
５（ａ）に示すように回路基板２３の一面２３ａには、
定電圧電源であるレギュレータ２４に接続された第１シ
ールドとしての保護配線２５が振動検出部１１を囲って
設けられている。また、図５（ｂ）に示すように回路基
板２３は、中間層２３ｂを有する３層の多層基板であ
る。振動検出部１１が設けられた位置に相当する中間層
２３ｂには、振動検出部１１をノイズから保護する第２
シールドとしての面状シールド２６が設けられている。
この面状シールド２６は、一面２３ａと中間層２３ｂと
を導通するスルーホール２７によって、一面２３ａに設
けられた保護配線２５と接続されることで、回路部品１
４の１つであるレギュレータ２４に接続されている。保
護配線２５と面状シールド２６は、レギュレータ２４に
よって振動センサ１１の基準電圧と同じ電圧に印加され
ており、他の回路の電圧変動の影響を受けにくい。Next, regarding the second embodiment of the present invention,
This will be described with reference to FIGS. 4 and 5. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. The sensor 22 shown in FIG.
1 and a circuit component 1 for processing the detection signal of the detection unit 11.
4 are mounted on one surface 23 a of the circuit board 23. As shown in FIG. 5A, one surface 23a of the circuit board 23 is
A protective wiring 25 as a first shield connected to a regulator 24 which is a constant voltage power source is provided surrounding the vibration detection unit 11. Further, as shown in FIG. 5B, the circuit board 23 is a three-layer multi-layer board having an intermediate layer 23b. The intermediate layer 23b corresponding to the position where the vibration detection unit 11 is provided has a second protection layer for protecting the vibration detection unit 11 from noise.
A planar shield 26 is provided as a shield.
The planar shield 26 is connected to the protective wiring 25 provided on the one surface 23a by a through hole 27 that electrically connects the one surface 23a and the intermediate layer 23b, and thus the circuit component 1
4 is connected to the regulator 24. The protective wiring 25 and the planar shield 26 are applied to the same voltage as the reference voltage of the vibration sensor 11 by the regulator 24, and are not easily affected by the voltage fluctuation of other circuits.
【００１６】以上のようにセンサ２２は、検出部１１や
電子部品１４及びその配線の内で特に外部ノイズの影響
を受けやすい部位、例えば高インピーダンスである振動
検出部１１を保護配線２５と面状シールド２６でシール
ドすることで外部ノイズを効果的に遮断できるので、セ
ンサ２２の出力信号に影響を及ぼす外部ノイズの重畳を
減少させることができる。したがって、外部ノイズの混
入が少なく、Ｓ／Ｎ比が大きい信号を得ることができる
ので、センサ２２の出力信号の精度や分解能が向上す
る。As described above, in the sensor 22, the detection section 11, the electronic component 14 and the wiring thereof are particularly susceptible to external noise, for example, the vibration detection section 11 having high impedance and the protection wiring 25 and the planar shape. Since the external noise can be effectively shielded by shielding with the shield 26, the superposition of the external noise that affects the output signal of the sensor 22 can be reduced. Therefore, it is possible to obtain a signal having a small S / N ratio with less mixing of external noise, so that the accuracy and resolution of the output signal of the sensor 22 are improved.
【００１７】なお、保護配線２５は、外部ノイズの影響
を受けやすい部位を完全に囲むように環状にすることが
望ましいが、配線の都合上で環状にすることが難しい場
合は、一部が開いたほぼ環状としてもよい。ただし、こ
の場合は、完全な環状に比べてノイズ保護の効果はわず
かに劣る。また、多層基板の両面２３ａ，２３ｃにわた
るスルーホールや配線を設けて、前記両面２３ａ，２３
ｃ回路部品などの実装部品を配置すると、第１の実施形
態のセンサ８と比較して広い実装面積が得られる。ま
た、中間層２３ｂの全面を面状シールド２６としてもよ
いが、本実施形態のように、必要な部位に面状シールド
２６を設けたほうが、他の部分を配線に活用することが
でき、回路設計の自由度が増すのでよい。そして、本実
施形態で説明した部分的なシールドは、第１の実施形態
の回路基板１５にも適用することが可能である。It is desirable that the protective wiring 25 be formed in a ring shape so as to completely surround a portion susceptible to the influence of external noise. However, if it is difficult to form a ring shape due to the wiring, a part of it is opened. It may be substantially circular. However, in this case, the effect of noise protection is slightly inferior to that of a perfect ring. Further, by providing through holes and wiring extending over both surfaces 23a, 23c of the multilayer substrate,
When mounting components such as c-circuit components are arranged, a wider mounting area can be obtained as compared with the sensor 8 of the first embodiment. Further, the entire surface of the intermediate layer 23b may be used as the planar shield 26, but if the planar shield 26 is provided at a necessary portion as in the present embodiment, the other portion can be utilized for wiring, and the circuit can be used. This is good because it increases the degree of freedom in design. The partial shield described in this embodiment can be applied to the circuit board 15 of the first embodiment.
【００１８】次に、本発明の第３の実施形態について図
６及び図７を参照して説明する。なお、第１及び第２の
実施形態と同様の構成については、同一の符号を付して
その説明を省略する。図６に示すセンサ２８は、回路基
板１５の一面１５ａに実装された振動検出部１１、温度
検出部１２、回路部品１４を囲むように保護配線２９が
設けられ、かつ、一面１５ａを覆ってケース状を成す第
３シールドとしてのシールドケース３０が設けられてい
る。このシールドケース３０は、図７（ａ）に示すよう
に保護配線２９と一部で導通しており、保護配線２９及
びこの保護配線２９とスルーホール２０を介して導通し
ている回路基板１５の他面１５ｂに設けられた面状シー
ルド２１と同じ基準電圧に接地されている。なお、セン
サケース１６に回路基板１５を収納し、回路基板１５及
びシールドケース３０とセンサケース１６との間に充填
材１７を充填する場合は、センサケース１６とシールド
ケース３０が直接触れないようにする。Next, a third embodiment of the present invention will be described with reference to FIGS. 6 and 7. The same components as those in the first and second embodiments are designated by the same reference numerals and the description thereof will be omitted. The sensor 28 shown in FIG. 6 is provided with a protective wiring 29 so as to surround the vibration detecting unit 11, the temperature detecting unit 12, and the circuit component 14 mounted on the one surface 15a of the circuit board 15, and covers the one surface 15a to cover the case. A shield case 30 as a third shield having a shape is provided. As shown in FIG. 7A, the shield case 30 is partially electrically connected to the protective wiring 29, and the protective wiring 29 and the circuit board 15 electrically connected to the protective wiring 29 through the through hole 20. It is grounded to the same reference voltage as the planar shield 21 provided on the other surface 15b. When the circuit board 15 is housed in the sensor case 16 and the filling material 17 is filled between the circuit board 15 and the shield case 30 and the sensor case 16, the sensor case 16 and the shield case 30 should not be directly touched. To do.
【００１９】以上のようにセンサ２８は、各検出部１
１，１２及び回路部品１４を包み込むように保護配線２
９、シールドケース３０、面状シールド２１で覆ってい
るので、外部ノイズを効果的に遮断することができる。
したがって、センサ２８の出力信号に影響を及ぼす外部
ノイズの混入が少なく、Ｓ／Ｎ比が大きい信号を得るこ
とができるので、センサ２２の出力信号の精度や分解能
が向上する。As described above, the sensor 28 is provided in each detecting section 1
Protective wiring 2 so as to wrap 1, 12 and circuit component 14
Since it is covered with 9, the shield case 30, and the planar shield 21, external noise can be effectively blocked.
Therefore, the external noise that affects the output signal of the sensor 28 is less mixed and a signal having a large S / N ratio can be obtained, so that the accuracy and resolution of the output signal of the sensor 22 are improved.
【００２０】なお、第２の実施形態のように、外部ノイ
ズに影響を受けやすい部位を保護配線２９、シールドケ
ース３０、面状シールド２１で覆ってもよい。また、回
路基板１５を多層の回路基板２３とし、一面２３ａと他
面２３ｃに検出部１１，１２，１３や回路部品１４を実
装する場合は、シールドケース３０を一面２３ａと他面
２３ｂのそれぞれに設けて、検出部１１，１２，１３や
回路部品１４を外部ノイズから保護するとよい。Incidentally, as in the second embodiment, a portion which is easily affected by external noise may be covered with the protective wiring 29, the shield case 30, and the planar shield 21. When the circuit board 15 is a multilayer circuit board 23 and the detection units 11, 12, 13 and the circuit component 14 are mounted on the one surface 23a and the other surface 23c, the shield case 30 is provided on each of the one surface 23a and the other surface 23b. It may be provided to protect the detection units 11, 12, 13 and the circuit component 14 from external noise.
【００２１】各実施形態において、検出部は、温度、振
動及び回転速度をそれぞれ検出するものであるが、これ
に限らず圧力や湿度を検出する場合にも適用できる。In each of the embodiments, the detection unit detects the temperature, the vibration and the rotation speed, respectively, but the invention is not limited to this and can be applied to the case of detecting the pressure and the humidity.
【００２２】第１の実施形態において、軸受２を単列深
溝玉軸受として図１で図示したが、スラスト玉軸受やア
ンギュラ玉軸受あるいは円錐ころ軸受など他の形式の軸
受であってもよい。In the first embodiment, the bearing 2 is shown as a single-row deep groove ball bearing in FIG. 1, but it may be another type of bearing such as a thrust ball bearing, an angular ball bearing or a tapered roller bearing.
【００２３】第１の実施形態の軸受装置１は、検出部１
１，１２，１３と回路部品１４とを実装した回路基板１
５をセンサケース１６に充填材１７で固定したセンサ８
を、２つの軸受２の固定輪である外輪３を連結するハウ
ジング４に取付けたが、軸受２の外輪（固定輪）３にセ
ンサ８を直接取付けたセンサ付軸受装置としてもよい。
また、検出した信号をワイヤレス、例えば電波や光また
は超音波などで送信する信号出力手段をセンサ８に備
え、このセンサ８を回転輪である内輪５、またはこの内
輪に固定された部材に取付けてもよい。The bearing device 1 according to the first embodiment is provided with the detecting portion 1
Circuit board 1 on which 1, 12, 13 and circuit component 14 are mounted
The sensor 8 in which 5 is fixed to the sensor case 16 with the filler 17
Is attached to the housing 4 that connects the outer ring 3 that is the fixed ring of the two bearings 2, but a sensor-equipped bearing device in which the sensor 8 is directly attached to the outer ring (fixed ring) 3 of the bearing 2 may be used.
Further, the sensor 8 is provided with signal output means for transmitting the detected signal wirelessly, for example, by radio wave, light or ultrasonic wave, and the sensor 8 is attached to the inner ring 5 which is a rotating wheel or a member fixed to the inner ring. Good.
【００２４】また、第１及び第２の実施形態のセンサ
８，２２は、回路基板１５，２３を充填材１７でモール
ドしてセンサケース１６の中に固定したが、温度変化の
激しい環境で使用される場合は、回路基板１５とセンサ
ケース１６と充填材１７との熱膨張率の差によって一面
１５ａ，２３ａに実装した検出部１１，１２，１３や回
路部品１４が損傷しないように、軟質の樹脂、例えばシ
リコーン樹脂や軟質ウレタン樹脂で覆った後、硬質の樹
脂、例えばエポキシ樹脂や硬質ウレタン樹脂で覆って固
定するとよい。あるいは、充填材で固定する代わりにね
じで固定してもよい。In the sensors 8 and 22 of the first and second embodiments, the circuit boards 15 and 23 are molded with the filling material 17 and fixed in the sensor case 16, but they are used in an environment where the temperature changes drastically. In such a case, a soft material is used so that the detection parts 11, 12, 13 and the circuit components 14 mounted on the one surface 15a, 23a are not damaged by the difference in the coefficient of thermal expansion among the circuit board 15, the sensor case 16, and the filling material 17. After covering with a resin such as a silicone resin or a soft urethane resin, it may be fixed by covering with a hard resin such as an epoxy resin or a hard urethane resin. Alternatively, instead of fixing with the filling material, it may be fixed with screws.
【００２５】[0025]
【発明の効果】本発明のセンサによれば、検出対象を検
出する検出部と、この検出部によって検出された信号を
処理する回路部品と、検出部と回路部品とを実装した回
路基板と、この回路の基準電圧に接続したノイズ用シー
ルドとを備えたので、センサの出力信号に影響を及ぼす
外部ノイズの重畳を効果的に減少させることができる。
したがって、外部ノイズの混入が少なく、Ｓ／Ｎ比が大
きい信号を得られるので、センサの出力信号の精度や分
解能が向上する。According to the sensor of the present invention, a detection section for detecting a detection target, a circuit component for processing a signal detected by the detection section, a circuit board on which the detection section and the circuit component are mounted, Since the noise shield connected to the reference voltage of this circuit is provided, it is possible to effectively reduce the superposition of external noise that affects the output signal of the sensor.
Therefore, a signal with a small S / N ratio mixed with external noise can be obtained, and the accuracy and resolution of the output signal of the sensor are improved.
【００２６】そして、このセンサを備えたセンサ付軸受
装置によれば、外部ノイズの多い環境においても外部ノ
イズの混入が少なく、Ｓ／Ｎ比が大きい信号が得られ
る。したがって、軸受の状態を精度よく監視できる。According to the bearing device with a sensor including this sensor, even in an environment with a lot of external noise, the mixing of external noise is small and a signal with a large S / N ratio can be obtained. Therefore, the condition of the bearing can be accurately monitored.
【図１】本発明の第１の実施形態のセンサ付軸受装置を
示す断面図。FIG. 1 is a sectional view showing a bearing device with a sensor according to a first embodiment of the present invention.
【図２】図１のセンサの断面図。2 is a cross-sectional view of the sensor of FIG.
【図３】（ａ）は、図２の回路基板の正面図。（ｂ）
は、図２の回路基板を一部断面にして示す側面図。
（ｃ）は、図２の回路基板の背面図。FIG. 3A is a front view of the circuit board shown in FIG. (B)
FIG. 3 is a side view showing the circuit board of FIG. 2 in a partial cross section.
FIG. 3C is a rear view of the circuit board of FIG. 2.
【図４】本発明の第２の実施形態のセンサを示す断面
図。FIG. 4 is a sectional view showing a sensor according to a second embodiment of the present invention.
【図５】（ａ）は、図４の回路基板の正面図。（ｂ）
は、図４の回路基板を一部断面にして示す側面図。
（ｃ）は、図５（ｂ）中Ｆ５−Ｆ５で示す回路基板の中
間層を示す断面図。5A is a front view of the circuit board shown in FIG. (B)
FIG. 4 is a side view showing the circuit board of FIG. 4 in a partial cross section.
5C is a cross-sectional view showing an intermediate layer of the circuit board indicated by F5-F5 in FIG. 5B.
【図６】本発明の第３の実施形態のセンサを示す断面
図。FIG. 6 is a sectional view showing a sensor according to a third embodiment of the present invention.
【図７】（ａ）は、図６の回路基板の正面図。（ｂ）
は、図７（ａ）中のＦ７−Ｆ７で示す回路基板の断面
図。（ｃ）は、図６の回路基板の背面図。7A is a front view of the circuit board shown in FIG. (B)
FIG. 8 is a cross-sectional view of the circuit board indicated by F7-F7 in FIG. FIG. 7C is a rear view of the circuit board of FIG. 6.
１…軸受装置 ２…軸受 ３…外輪（固定輪） ４…ハウジング（固定輪に固定した部材） ５…内輪（回転輪） ８，２２，２８…センサ １１…振動検出部 １２…温度検出部 １３…回転速度検出部 １４…回路部品 １５，２３…回路基板 １８，２５，２９…保護配線（第１シールド） ２１，２６…面状シールド（第２シールド） ３０…シールドケース（第３シールド） 1 ... Bearing device 2 ... Bearing 3 ... Outer ring (fixed ring) 4 ... Housing (member fixed to fixed ring) 5 ... Inner ring (rotating ring) 8, 22, 28 ... Sensor 11 ... Vibration detector 12 ... Temperature detector 13 ... Rotational speed detector 14 ... Circuit parts 15, 23 ... Circuit board 18, 25, 29 ... Protective wiring (first shield) 21, 26 ... Planar shield (second shield) 30 ... Shield case (3rd shield)
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｇ１２Ｂ 17/02 Ｇ１２Ｂ 17/02 Ｈ０５Ｋ 9/00 Ｈ０５Ｋ 9/00 Ｆ (72)発明者 遠藤 茂 神奈川県藤沢市鵠沼神明一丁目５番50号 日本精工株式会社内 Ｆターム(参考） 2F078 HA13 5E321 AA02 AA14 AA17 AA23 AA50 CC16 GG05 GG09 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI theme code (reference) G12B 17/02 G12B 17/02 H05K 9/00 H05K 9/00 F (72) Inventor Shigeru Endo Fujisawa Kanagawa Prefecture 1-5-50 Shinmei Kugenuma, Ichi F-Term (reference) within NSK Ltd. 2F078 HA13 5E321 AA02 AA14 AA17 AA23 AA50 CC16 GG05 GG09
Claims (5)
で検出した信号を処理する回路部品と、前記検出部と前
記回路部品を実装した回路基板と、この回路の基準電圧
に接続して設けられたノイズ用シールドとを備えたこと
を特徴とするセンサ。1. A detection unit for detecting a detection target, a circuit component for processing a signal detected by the detection unit, a circuit board on which the detection unit and the circuit component are mounted, and a reference voltage of the circuit. And a noise shield provided on the sensor.
面に前記検出部と前記回路部品の少なくとも一部を囲ん
で環状に配置されたノイズ用第１シールドと、 前記回路基板の前記検出部と前記回路部品とが実装され
た面と反対の面に、少なくとも前記第１シールドで囲ま
れた領域と前記反対の面側から覆うように前記領域と対
抗して面状に配置されたノイズ用第２シールドとのうち
の少なくともいずれか一方で構成されていることを特徴
とする請求項１に記載のセンサ。2. The first shield for noise, wherein the shield is annularly arranged on a surface of the circuit board on which the detection unit and the circuit component are mounted so as to surround at least a part of the detection unit and the circuit component. And a surface of the circuit board opposite to the surface on which the detection unit and the circuit component are mounted, at least facing the area surrounded by the first shield and the surface opposite to the area. The sensor according to claim 1, wherein the sensor is configured by at least one of the second shield for noise arranged in a planar shape.
出部と前記回路部品を実装した面に前記検出部と前記回
路部品の少なくとも一部を囲んで環状に配置されたノイ
ズ用第１シールドと、 前記回路の基準電圧に接続され、前記回路基板の前記検
出部と前記回路部品とが実装された面と反対側の面に、
少なくとも前記第１シールドで囲まれた領域を前記反対
の面側から覆うように前記領域と対抗して面状に配置さ
れたノイズ用第２シールドと、 前記回路の基準電圧に接続され、前記回路基板の前記検
出部と前記回路部品とが実装された面に前記検出部と前
記回路部品との内の少なくともいずれか一方を覆って取
付けられたケース状のノイズ用第３シールドとを備えた
ことを特徴とするセンサ。3. A detection unit for detecting a detection target, a circuit component for processing a signal detected by the detection unit, a circuit board on which the detection unit and the circuit component are mounted, and a circuit connected to a reference voltage of the circuit. A first shield for noise that is annularly arranged on the surface of the circuit board on which the detection unit and the circuit component are mounted and surrounds at least a part of the detection unit and the circuit component; and to connect to the reference voltage of the circuit The surface of the circuit board opposite to the surface on which the detection unit and the circuit component are mounted,
A noise second shield arranged in a planar shape so as to cover at least a region surrounded by the first shield from the opposite surface side, and connected to a reference voltage of the circuit. A case-shaped third shield for noise, which is attached to a surface of the board on which the detection unit and the circuit component are mounted so as to cover at least one of the detection unit and the circuit component; A sensor characterized by.
と、圧力の内の少なくともいずれか１つを検出すること
を特徴とする請求項１から請求項３に記載のセンサ。4. The sensor according to claim 1, wherein the detection unit detects at least one of temperature, vibration, rotation speed, and pressure.
の、前記回転輪または前記固定輪の少なくともいずれか
一方またはこれに固定された部材に、請求項１から請求
項４の内のいずれか１項に記載のセンサを取付けたこと
を特徴とするセンサ付軸受装置。5. A rolling bearing having a rotating ring and a fixed ring, at least one of the rotating ring and the fixed ring, or a member fixed to the rotating ring, and any one of claims 1 to 4. A bearing device with a sensor, wherein the sensor according to item 1 is attached.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001242719A JP2003057078A (en) | 2001-08-09 | 2001-08-09 | Sensor and bearing apparatus with the sensor |
| EP01128644A EP1211500B1 (en) | 2000-12-01 | 2001-11-30 | Rolling bearing apparatus with sensor |
| DE60139757T DE60139757D1 (en) | 2000-12-01 | 2001-11-30 | Rolling bearing device with sensor |
| US09/996,593 US6695483B2 (en) | 2000-12-01 | 2001-11-30 | Sensor and rolling bearing apparatus with sensor |
| US10/643,905 US7014368B2 (en) | 2000-12-01 | 2003-08-20 | Sensor and rolling bearing apparatus with sensor |
| US11/330,148 US20060110086A1 (en) | 2000-12-01 | 2006-01-12 | Sensor and rollling bearing apparatus with sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001242719A JP2003057078A (en) | 2001-08-09 | 2001-08-09 | Sensor and bearing apparatus with the sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003057078A true JP2003057078A (en) | 2003-02-26 |
Family
ID=19072951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001242719A Withdrawn JP2003057078A (en) | 2000-12-01 | 2001-08-09 | Sensor and bearing apparatus with the sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003057078A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013117477A (en) * | 2011-12-05 | 2013-06-13 | Mikuni Corp | Non-contact type rotation angle detection device, method for manufacturing the same and throttle valve control device |
| JP2017009029A (en) * | 2015-06-22 | 2017-01-12 | 光洋電子工業株式会社 | Sensor-equipped bearing |
| JP2022048967A (en) * | 2020-09-15 | 2022-03-28 | 中磊電子股▲ふん▼有限公司 | Network communication device with electrostatic protection function |
-
2001
- 2001-08-09 JP JP2001242719A patent/JP2003057078A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013117477A (en) * | 2011-12-05 | 2013-06-13 | Mikuni Corp | Non-contact type rotation angle detection device, method for manufacturing the same and throttle valve control device |
| WO2013084802A1 (en) * | 2011-12-05 | 2013-06-13 | 株式会社ミクニ | Non-contact rotation angle detection device, manufacturing method therefor and throttle valve control apparatus |
| JP2017009029A (en) * | 2015-06-22 | 2017-01-12 | 光洋電子工業株式会社 | Sensor-equipped bearing |
| JP2022048967A (en) * | 2020-09-15 | 2022-03-28 | 中磊電子股▲ふん▼有限公司 | Network communication device with electrostatic protection function |
| JP7158528B2 (en) | 2020-09-15 | 2022-10-21 | 中磊電子股▲ふん▼有限公司 | Network communication device with electrostatic protection function |
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