JP3179959B2 - Liquid level detector and liquid level detector - Google Patents
Liquid level detector and liquid level detectorInfo
- Publication number
- JP3179959B2 JP3179959B2 JP05214094A JP5214094A JP3179959B2 JP 3179959 B2 JP3179959 B2 JP 3179959B2 JP 05214094 A JP05214094 A JP 05214094A JP 5214094 A JP5214094 A JP 5214094A JP 3179959 B2 JP3179959 B2 JP 3179959B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid level
- liquid
- level sensor
- temperature
- capacitance
- 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
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【0001】[0001]
【産業上の利用分野】本発明は、例えばエンジンあるい
はトランスミッションの潤滑油の量を判断するための液
面レベルを検出する液面検知装置および液面検出装置に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid level detecting device and a liquid level detecting device for detecting a liquid level for judging an amount of lubricating oil for an engine or a transmission, for example.
【0002】[0002]
【従来の技術】従来、例えば自動車のエンジンあるいは
トランスミッションの潤滑油の量を判断するための液面
レベルを検出する液面検知装置としては、図8および図
9に示すものが知られている。2. Description of the Related Art Conventionally, as a liquid level detecting device for detecting a liquid level for judging an amount of lubricating oil of an engine or a transmission of an automobile, for example, those shown in FIGS. 8 and 9 are known.
【0003】この図8および図9に示す液面検知装置
は、一端側に指が引っ掛けられるように環状に屈曲した
金属線の把持部41の他端側に、弾性を有する金属ワイヤ
ー製の接続部42を取り付け、この接続部42の先端に金属
平板状で一面に目盛り43a を設けた検出部43を有してい
る。The liquid level detecting device shown in FIGS. 8 and 9 has a resilient metal wire connected to the other end of a metal wire gripping portion 41 bent in a ring shape so that a finger can be hooked on one end. A connecting section 42 is attached, and a connecting section 42 has a detecting section 43 provided at the tip of the connecting section 42 in the form of a flat metal plate with a scale 43a on one surface.
【0004】また、この液面検知装置44は、把持部41と
接続部42との間に位置決め手段45を有し、この位置決め
手段45は、略円柱状の一端面に把持部41の軸方向に対し
て略垂直な当接面46を有した胴体部47と、この胴体部47
の当接面46に断面波状のシール部48とをゴムにて一体形
成し、把持部41に嵌着固定している。The liquid level detecting device 44 has a positioning means 45 between the grip portion 41 and the connection portion 42. The positioning means 45 is provided on one end surface of the substantially cylindrical shape in the axial direction of the grip portion 41. A body part 47 having a contact surface 46 substantially perpendicular to the body part 47;
A seal portion 48 having a wavy cross section is integrally formed on the contact surface 46 thereof with rubber, and is fitted and fixed to the grip portion 41.
【0005】一方、50はオイルパン、このオイルパン50
は、内部にエンジン用あるいはオートマチックトランス
ミッション用のオイル51を収容し、一側面から上方に屈
曲して導出する導出管52を有し、この導出管52は、上端
に点検口53を開口し、下端がオイルパン50内に連続する
管状に形成されている。[0005] On the other hand, reference numeral 50 denotes an oil pan.
Has an outlet 51 for accommodating an oil 51 for an engine or an automatic transmission therein, and is bent upward from one side and led out.The outlet 52 has an inspection port 53 at an upper end, and a lower end. Are formed in a continuous tubular shape in the oil pan 50.
【0006】そして、液面検知装置44を、検出部43を点
検口53から導出管52を介してオイルパン50内に挿入して
オイル51に先端部を浸漬させ、シール部48が導出管52の
上端部近傍の内周面に液密に当接させ、胴体部47の当接
面46を導出管52の上端の点検口53の周縁に当接させて、
導出管52に支持させる。[0006] Then, the liquid level detecting device 44 is inserted into the oil pan 50 from the inspection port 53 through the outlet pipe 52 through the inspection port 53 to immerse the tip portion in the oil 51, and the seal part 48 is connected to the outlet pipe 52. A liquid-tight abutment on the inner peripheral surface near the upper end of the body, abutting the abutment surface 46 of the body 47 against the periphery of the inspection port 53 at the upper end of the outlet pipe 52,
It is supported by the outlet pipe 52.
【0007】また、オイル51の量を測定する場合には、
導出管52に支持されている液面検知装置44を把持部41の
環状部分に指を引っ掛けて引き抜き、オイル51で濡れて
いる引き出した検出部43を布切れなどで一旦拭き取り、
再び液面検知装置44を位置決め手段45の当接面46が導出
管52の上端縁に当接するまで、検出部43をオイルパン50
内に挿入させる。そして、再び液面検知装置44を引き抜
き、検出部43のオイル51で濡れている境界線を、検出部
43に設けた目盛り43a と対比させ、オイルパン50内のオ
イル51の液面を判断してオイル51の量を判断する。When measuring the amount of oil 51,
The liquid level detection device 44 supported by the outlet pipe 52 is pulled out by hooking a finger on the annular portion of the grip portion 41, and the extracted detection portion 43 wet with the oil 51 is wiped off once with a piece of cloth,
The liquid level detecting device 44 is again moved to the oil pan 50 until the contact surface 46 of the positioning means 45 contacts the upper end edge of the outlet pipe 52.
Insert into. Then, the liquid level detection device 44 is pulled out again, and the boundary line of the detection unit 43 wet with the oil 51 is detected by the detection unit 43.
The amount of oil 51 is determined by comparing the level of oil 51 in oil pan 50 with the scale 43a provided in 43.
【0008】[0008]
【発明が解決しようとする課題】ところで、例えば自動
車の出荷の際には、オイル51の量の測定は、検出部43の
オイル51で濡れた境界線の位置をmm単位の目盛りが設け
られたものさしなどの測定器により測定して確認してい
る。By the way, for example, when an automobile is shipped, when measuring the amount of the oil 51, the position of the boundary line wetted by the oil 51 of the detecting unit 43 is provided with a scale of mm unit. Confirmed by measuring with a measuring instrument such as a ruler.
【0009】このため、上記従来の液面検知装置44によ
りオイル51の量を測定する場合には、液面検知装置44を
2度抜き差ししなければならず、測定作業が煩雑である
とともに、オイル51で濡れた境界線をものさしなどで測
定する際、オイル51は比較的表面張力が小さいため、そ
の境界線がはっきりせず、また、液面検知装置44を引き
抜く際に、検出部43が導出管52の内部に当接して境界線
がにじみ、mm単位の測定に誤差が生じ易い問題がある。For this reason, when measuring the amount of oil 51 with the above-mentioned conventional liquid level detecting device 44, the liquid level detecting device 44 must be inserted and removed twice, which makes the measuring operation complicated and reduces the oil level. When measuring the boundary line wet with 51 with a ruler, the boundary line is not clear because the oil 51 has a relatively small surface tension, and the detection unit 43 is derived when the liquid level detection device 44 is pulled out There is a problem that the boundary line bleeds due to contact with the inside of the tube 52, and an error easily occurs in the measurement in the unit of mm.
【0010】また、車種によって導出管52の長さが異な
るため、それぞれの導出管52に対応した液面検知装置44
が必要で、汎用性が低い問題も有している。Further, since the length of the outlet pipe 52 differs depending on the type of vehicle, the liquid level detecting device 44 corresponding to each outlet pipe 52 is provided.
However, there is a problem that versatility is low.
【0011】本発明は、上記問題点に鑑みなされたもの
で、液面の測定が容易で、また、汎用性が高い液面検知
装置および液面検出装置を提供することを目的とするも
のである。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a liquid level detecting device and a liquid level detecting device which can easily measure the liquid level and have high versatility. is there.
【0012】[0012]
【課題を解決するための手段】請求項1記載の液面検知
装置は、誘電性を有する液体を収容可能で先端部および
基端部に気液交換用の先端流通孔および基端流通孔が形
成された筒状の外部電極、および、この外部電極に対し
て絶縁間隙を介して外部電極内の軸方向に沿って設けら
れた長手状の内部電極を備え前記液体内に挿入される液
面センサと、この液面センサに接続された長手状の把持
部と、この把持部にこの把持部の長手方向に沿って摺動
可能に設けられて前記液面センサの位置を所定位置に設
定する位置決め手段とを具備したものである。According to a first aspect of the present invention, there is provided a liquid level detecting device capable of storing a liquid having a dielectric property, and having a front-end flow hole and a base-end flow hole for gas-liquid exchange at a front end and a base end. A liquid surface to be inserted into the liquid, comprising: a formed cylindrical external electrode; and a long internal electrode provided along the axial direction in the external electrode via an insulating gap with respect to the external electrode. A sensor, a longitudinal grip connected to the liquid level sensor, and sliding on the grip along the longitudinal direction of the grip.
Capable provided is obtained by and a positioning means for setting a position of the liquid level sensor to a predetermined position.
【0013】請求項2記載の液面検知装置は、請求項1
記載の液面検知装置において、把持部は、液面センサが
弾性を有する管状の接続部を介して接続されたものであ
る。According to a second aspect of the present invention, there is provided a liquid level detecting device.
In the liquid level detecting apparatus according grip portion is for the liquid level sensor is connected via a connecting portion of the tubular having <br/> elasticity.
【0014】請求項3記載の液面検出装置は、請求項1
または2記載の液面検知装置と、液面センサの外部電極
および内部電極間に交流電圧を印加する電源手段と、こ
の電源手段により印加された電圧に基づき前記外部電極
および前記内部電極間の静電容量を検出する静電容量検
出手段と、この静電容量検出手段で検出された静電容量
に基づき液面を検知する液面検知手段とを具備したもの
である。According to a third aspect of the present invention, there is provided a liquid level detecting device.
Or a power supply means for applying an AC voltage between an external electrode and an internal electrode of the liquid level sensor, and a static electricity between the external electrode and the internal electrode based on the voltage applied by the power supply means. The apparatus comprises a capacitance detecting means for detecting a capacitance, and a liquid level detecting means for detecting a liquid level based on the capacitance detected by the capacitance detecting means.
【0015】請求項4記載の液面検出装置は、請求項3
記載の液面検出装置において、液面センサ近傍に取り付
けられ液体の温度を検出する温度検出手段と、この温度
検出手段で検出された液面の温度に基づき液面検知手段
で検知された液面を補正する温度補正手段とを具備した
ものである。The liquid level detecting apparatus according to claim 4, wherein the claim 3
In the liquid level detecting device described in the above, a temperature detecting means attached near the liquid level sensor for detecting the temperature of the liquid, and a liquid level detected by the liquid level detecting means based on the temperature of the liquid level detected by the temperature detecting means And temperature correction means for correcting
【0016】[0016]
【作用】請求項1記載の液面検知装置は、長手状の把持
部に接続された液面センサを液体内に把持部の長手方向
に沿って摺動移動な位置決め手段により所定位置に挿入
させ、筒状の外部電極に設けた気液交換用の先端流通孔
および基端流通孔により、液体を筒状の外部電極内の軸
方向に沿って設けられた長手状の内部電極との絶縁間隙
に収容し、外部電極および内部電極間の液体の位置によ
って静電容量が変化して電位が変化するので、この電位
を測定することにより液面が検知できるため、液面セン
サを位置決め手段にて所定位置となるように液体内に挿
入するのみで、容易に短時間で高精度に液面位置が検知
可能となる。また、位置決め手段を 長手状の把持部の長
手方向に沿って摺動可能に設けたため、位置決め手段を
摺動移動させるのみで、液面の検知箇所を問わず液面を
容易で高精度に検知可能となり、汎用性が向上する。 [Action] fluid level sensing apparatus of claim 1, wherein the longitudinal direction of the grip portion of the liquid surface sensor connected to the elongated gripping portion in the liquid
The liquid is inserted into a predetermined position by positioning means slidably moving along , and the liquid flows in the axial direction in the cylindrical external electrode by the gas-liquid exchange front and rear circulation holes provided in the cylindrical external electrode. It is housed in an insulating gap with the longitudinal internal electrode provided along, and the capacitance changes according to the position of the liquid between the external electrode and the internal electrode, and the potential changes. By measuring this potential, Since the liquid level can be detected, the liquid level sensor can be easily detected in a short time and with high accuracy simply by inserting the liquid level sensor into the liquid so as to be at a predetermined position by the positioning means. In addition, the positioning means may be a long grip.
The positioning means is slidable along the hand direction.
Just slide and move the liquid level regardless of the liquid level detection point.
Detection can be performed easily and with high accuracy, and versatility is improved.
【0017】請求項2記載の液面検知装置は、請求項1
記載の液面検知装置において、把持部に液面センサを弾
性を有する管状の接続部を介して接続したため、例えば
液面の検知箇所が屈曲する場合でも、接続部を液面の検
知箇所の屈曲に対応して屈曲させ、液面センサを位置決
め手段にて所定位置となるように液体内に挿入するのみ
で、容易に短時間で高精度に液面位置が検知可能とな
る。また、接続部が管状であるため、例えば液面センサ
のリード線を処理する場合、リード線を接続部内に配設
可能で、リード線が露出することなく液面の検知箇所の
摩擦や屈曲などによるリード線の損傷が防止される。 According to a second aspect of the present invention, there is provided a liquid level detecting device according to the first aspect.
In the liquid level detection device according to the above, since the liquid level sensor is connected to the grip portion via a tubular connection having elasticity, for example, even when the liquid level detection portion is bent, the connection portion is bent at the liquid level detection portion. And the liquid level sensor can be easily detected in a short time with high accuracy by simply inserting the liquid level sensor into the liquid so as to be at a predetermined position by the positioning means. In addition, since the connecting portion is tubular, for example, when processing the lead wire of the liquid level sensor, the lead wire can be arranged in the connecting portion, and the lead wire is not exposed, such as friction or bending of the liquid level detecting portion. damage of the lead wire due to the Ru is prevented.
【0018】請求項3記載の液面検出装置は、液体内に
液面センサが挿入された請求項1または2記載の液面検
知装置に、電源手段により液面センサの外部電極および
内部電極間に交流電圧を印加し、この電源手段により印
加された電圧に基づき外部電極および内部電極間の静電
容量を静電容量検出手段にて検出し、この静電容量検出
手段で検出した静電容量に基づき液面検知手段により液
面を検知するため、液面センサを位置決め手段にて所定
位置となるように液体内に挿入するのみで、容易に短時
間で高精度に液面位置が検知可能となる。According to a third aspect of the present invention, there is provided a liquid level detecting device according to the first or second aspect, wherein the liquid level sensor is inserted into the liquid, and a power supply means is provided between the external electrode and the internal electrode of the liquid level sensor. AC voltage is applied to the power supply, and the capacitance between the external electrode and the internal electrode is detected by the capacitance detection means based on the voltage applied by the power supply means, and the capacitance detected by the capacitance detection means is applied. The liquid level is detected by the liquid level detection means based on the sensor, so the liquid level sensor can be detected easily and in a short time with high accuracy simply by inserting the liquid level sensor into the liquid so that it is at the predetermined position by the positioning means. Becomes
【0019】請求項4記載の液面検出装置は、請求項3
記載の液面検出装置において、液面センサ近傍に取り付
けられた温度検出手段にて液体の温度を検出し、この温
度検出手段で検出した液面の温度に基づき温度補正手段
により液面検知手段で検知した液面を補正するため、温
度により液体の誘電率が変化するなどしても容易に短時
間で高精度に液面位置が検知可能となる。According to a fourth aspect of the present invention, there is provided a liquid level detecting apparatus according to the third aspect.
In the liquid level detection device described above, the temperature of the liquid is detected by temperature detection means attached near the liquid level sensor, and based on the temperature of the liquid surface detected by the temperature detection means, the temperature is corrected by the liquid level detection means. Since the detected liquid level is corrected, even if the dielectric constant of the liquid changes depending on the temperature, the liquid level position can be easily detected with high accuracy in a short time.
【0020】[0020]
【実施例】以下、本発明の液面検出装置の一実施例の構
成を図面を参照して説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of an embodiment of the liquid level detecting device of the present invention will be described below with reference to the drawings.
【0021】図5において、1は例えば自動車のエンジ
ンの下部に設けられるオイルパンで、このオイルパン1
は金属製で略箱状に形成され、内部にエンジン用あるい
はオートマチックトランスミッション用の誘電性を有す
る液体のオイル2を収容するようになっている。そし
て、このオイルパン1の一側面には、図示しない自動車
のエンジン室内の他の部品に干渉しないように斜め上方
に屈曲して導出管3が突出形成されている。また、この
導出管3は、上端に点検口4が開口され下端がオイルパ
ン1内に連続する管状に形成されている。In FIG. 5, reference numeral 1 denotes an oil pan provided at a lower portion of, for example, an engine of an automobile.
Is made of metal and is formed in a substantially box shape, and accommodates therein a liquid oil 2 having a dielectric property for an engine or an automatic transmission. On one side surface of the oil pan 1, a lead-out pipe 3 is formed so as to be bent obliquely upward so as not to interfere with other parts of the engine compartment of the automobile (not shown). The outlet pipe 3 is formed in a tubular shape in which an inspection port 4 is opened at an upper end and a lower end is continuous in the oil pan 1.
【0022】一方、6は液面検知装置本体で、この液面
検知装置本体6は、図1ないし図5に示すように、例え
ば合成樹脂や硬質のゴム製で中心軸に図示しない挿通孔
が設けられた円筒状の把持部7を有している。そして、
この把持部7の外周面には、位置目盛8が軸方向に沿っ
て所定の間隔で設けられている。On the other hand, reference numeral 6 denotes a main body of the liquid level detecting device. As shown in FIGS. 1 to 5, the main body 6 of the liquid level detecting device is made of, for example, synthetic resin or hard rubber and has an insertion hole (not shown) at the center axis. It has a cylindrical grip 7 provided. And
Position scales 8 are provided at predetermined intervals along the axial direction on the outer peripheral surface of the grip portion 7.
【0023】また、この把持部7には、例えば合成樹脂
やゴム製の円筒状の位置決め手段10が摺動自在に嵌合し
て設けられ、この位置決め手段10には、軸方向の一端面
に軸方向に対して略垂直の当接面11が形成されている。A cylindrical positioning means 10 made of, for example, a synthetic resin or rubber is slidably fitted to the grip portion 7. The positioning means 10 has one end face in the axial direction. A contact surface 11 substantially perpendicular to the axial direction is formed.
【0024】さらに、把持部7には、金属製のスパイラ
ル状のフレキシブルチューブや耐熱合成樹脂のフレキシ
ブルチューブなどの弾性を有した管状の接続部12が、一
端側が把持部7の挿通孔に嵌合固定されて接続されてい
る。Further, an elastic tubular connecting portion 12 such as a metal spiral flexible tube or a heat-resistant synthetic resin flexible tube is fitted in the holding portion 7, and one end of the connecting portion 12 is fitted into an insertion hole of the holding portion 7. Fixed and connected.
【0025】また、この接続部12の先端側には、液面セ
ンサ13が設けられている。Further, a liquid level sensor 13 is provided at the tip end of the connection portion 12.
【0026】そして、液面センサ13は、図1ないし図4
に示すように、例えば真鍮やアルミニウム合金などの導
電性材料にて細長円筒状に形成された外部電極15を有し
ている。この外部電極15は軸方向の基端および先端近傍
に、直径が例えば2mm程度の円形でオイル2が流通可能
な基端流通孔16a および先端流通孔16b が複数穿設され
ている。なお、これら先端流通孔16b および基端流通孔
16a は、オイル2が流通可能で気液交換可能となり、オ
イル2が外部電極15内に浸入する。The liquid level sensor 13 is shown in FIGS.
As shown in FIG. 3, the external electrode 15 is formed in an elongated cylindrical shape with a conductive material such as brass or an aluminum alloy. The external electrode 15 has a plurality of base end flow holes 16a and a plurality of front end flow holes 16b in the vicinity of the base end and the end in the axial direction, each having a circular shape having a diameter of, for example, about 2 mm, through which the oil 2 can flow. Note that these distal flow holes 16b and proximal flow holes 16b
In 16a, the oil 2 can flow and gas-liquid exchange is possible, and the oil 2 enters the external electrode 15.
【0027】一方、外部電極15の外周面には、軸方向に
沿って略等間隔に目盛りが記された液面検査目視用目盛
り17が設けられている。さらに、外部電極15の内周面側
には、軸方向の両端近傍に位置して絶縁性の合成樹脂や
ゴムなどの材料からなる環状の固定部18a ,18b が設け
られている。On the other hand, on the outer peripheral surface of the external electrode 15, there are provided liquid level inspection visual scales 17 on which scales are marked at substantially equal intervals along the axial direction. Further, on the inner peripheral surface side of the external electrode 15, annular fixing portions 18a, 18b made of a material such as insulating synthetic resin or rubber are provided near both ends in the axial direction.
【0028】また、20は内部電極で、この内部電極20
は、外部電極15と同材質にて外部電極15より径小の細長
円筒状に形成されている。そして、この内部電極20は、
外部電極15に設けられた固定部18a ,18b の内周に両端
が嵌合固定されて、外周面が外部電極15の内周面と絶縁
間隙21を介して外部電極15内に同軸状に位置決め固定さ
れている。Reference numeral 20 denotes an internal electrode.
Is formed of the same material as the external electrode 15 in the shape of an elongated cylinder smaller in diameter than the external electrode 15. And this internal electrode 20
Both ends are fitted and fixed to the inner periphery of the fixing portions 18a and 18b provided on the outer electrode 15, and the outer peripheral surface is coaxially positioned within the outer electrode 15 through the insulating gap 21 with the inner peripheral surface of the outer electrode 15. Fixed.
【0029】さらに、基端側の固定部18a には、合成樹
脂や硬質ゴムなどの絶縁性材料製で筒状に形成された接
続部材22が設けられている。そして、この接続部材22の
内周面側に接続部12が嵌着固定されて、液面センサ13が
接続部材22を介して接続部12の先端に設けられている。Further, a connecting member 22 made of an insulating material such as a synthetic resin or hard rubber and formed in a cylindrical shape is provided on the fixing portion 18a on the base end side. The connection portion 12 is fitted and fixed to the inner peripheral surface side of the connection member 22, and the liquid level sensor 13 is provided at the tip of the connection portion 12 via the connection member 22.
【0030】また、液面センサ13の先端には、先端側の
固定部18b の外面に位置して熱電対やサーミスタなどの
温度検出手段24が設けられている。そして、この温度検
出手段24の周囲には、合成樹脂や硬質ゴムなどにて半球
状に形成された保護キャップ25が、周縁が外部電極15の
周縁に混合固定されて温度検出手段24を覆って設けられ
ている。なお、保護キャップ25には、直径が例えば2mm
程度の円形で内部にオイル2が流入可能で気液交換可能
な流入孔26が複数穿設されている。At the tip of the liquid level sensor 13, a temperature detecting means 24 such as a thermocouple or a thermistor is provided on the outer surface of the fixed portion 18b on the tip side. Around the temperature detecting means 24, a protective cap 25 formed in a hemispherical shape with a synthetic resin, hard rubber, or the like is mixed and fixed to the peripheral edge of the external electrode 15 so as to cover the temperature detecting means 24. Is provided. The protective cap 25 has a diameter of, for example, 2 mm.
A plurality of inflow holes 26 having a circular shape into which the oil 2 can flow and gas-liquid exchange can be performed.
【0031】そして、液面センサ13の外部電極15の接続
部12側の端部の内周面および内部電極20の接続部12側の
端部の外周面には、把持部7の挿通孔および接続部12の
内部を通って配線された一対のシールド線28にて構成さ
れたリード線27がそれぞれ半田付けなどにより接続され
ている。さらに、温度検出手段24には、把持部7の挿通
孔、接続部12および内部電極20の内部を通って配線され
た電線29が接続されている。The inner peripheral surface of the end of the liquid level sensor 13 on the side of the connection portion 12 of the external electrode 15 and the outer peripheral surface of the end of the internal electrode 20 on the side of the connection portion 12 are provided with through holes for the grip portion 7. Lead wires 27 each composed of a pair of shield wires 28 wired through the inside of the connection portion 12 are connected by soldering or the like. Further, an electric wire 29 wired through the insertion hole of the grip part 7, the connection part 12, and the inside of the internal electrode 20 is connected to the temperature detection means 24.
【0032】また、リード線27および電線29の把持部7
の端部から導出する側の端部には、図示しないコネクタ
が設けられ、これらコネクタは、制御装置31に接続され
るようになっている。そして、液面検知装置本体6を制
御装置31に接続されて液面検出装置30が構成される。Further, the grip 7 of the lead wire 27 and the electric wire 29
Connectors (not shown) are provided at the ends on the side extending from the ends of the connectors, and these connectors are connected to the control device 31. Then, the liquid level detecting device 30 is configured by connecting the liquid level detecting device body 6 to the control device 31.
【0033】一方、制御装置31は、電源手段、静電容量
検出手段、液面検知手段および温度補正手段としての機
能を有し、図6に示すように、CPU(Central Proces
singUnit )が設けられた制御回路32と、この制御回路3
2に接続されたA/Dコンバータ33(アナログ−デジタ
ル変換装置)とから構成されている。On the other hand, the control device 31 has functions as a power supply unit, a capacitance detection unit, a liquid level detection unit, and a temperature correction unit, and as shown in FIG.
singUnit), and the control circuit 3
2 and an A / D converter 33 (analog-digital converter).
【0034】そして、制御回路32には、表示部34が接続
され、この表示部34は、図1および図5に示すように、
コネクタを介して接続された液面検知装置本体6の外部
電極15および内部電極20間の静電容量の電位および温度
検出手段24からの電気信号を制御回路32により処理した
結果を表示するようになっており、表示部34は、例えば
複数の発光ダイオードからなるバー表示式の液面レベル
表示部34a 、液晶による数値表示式の液面レベル表示部
34b 、オイル2の温度を液晶により数値表示する温度表
示部34c を設けている。なお、処理されたデータは、イ
ンターフェース35(RS232C)を介して接続されたパーソ
ナルコンピュータなどの演算記憶装置36により、液面検
知装置本体6により複数測定された結果を処理・記憶な
どをさせることも可能である。A display unit 34 is connected to the control circuit 32. The display unit 34, as shown in FIGS.
The control circuit 32 displays the result of processing the electric potential of the capacitance between the external electrode 15 and the internal electrode 20 and the electric signal from the temperature detecting means 24 by the control circuit 32 connected through the connector. The display unit 34 is, for example, a bar display type liquid level display unit 34a composed of a plurality of light emitting diodes, and a numerical display type liquid level display unit using liquid crystal.
34b, and a temperature display section 34c for numerically displaying the temperature of the oil 2 by liquid crystal is provided. The processed data may be processed / stored by the arithmetic storage device 36 such as a personal computer connected via the interface 35 (RS232C) to process and store a plurality of results measured by the liquid level detecting device body 6. It is possible.
【0035】次に、上記実施例の動作を説明する。Next, the operation of the above embodiment will be described.
【0036】例えば図示しない自動車の出荷前の諸検査
におけるオイル2の量を検査する際、まず、図示しない
固定手段を操作して位置決め手段10を把持部7の軸方向
に沿って移動させ、検査する車種に対応させて把持部7
の外周面に設けた所定の位置目盛8に当接面11を位置合
わせする。すなわち、当接面11から保護キャップ25の先
端までの長さが所定の長さとなるように、固定手段を操
作して位置決め手段10を摺動させ、所定の位置に位置決
め固定する。For example, when inspecting the amount of oil 2 in various inspections before shipment of a car (not shown), first, the fixing means (not shown) is operated to move the positioning means 10 along the axial direction of the grip portion 7, and the inspection is performed. Gripper 7 corresponding to the type of vehicle
The abutment surface 11 is aligned with a predetermined position scale 8 provided on the outer peripheral surface of. That is, the positioning means 10 is slid by operating the fixing means so that the length from the contact surface 11 to the tip of the protective cap 25 becomes a predetermined length, and the positioning means 10 is positioned and fixed at a predetermined position.
【0037】そして、商用交流電源37が供給された制御
装置31に液面検知装置本体6を接続し、制御装置31の図
示しない電源スイッチを閉成する。なお、この電源スイ
ッチの閉成により、外部電極15にリード線27を介して制
御装置31から定周波数の交流電圧が印加される。Then, the liquid level detecting device main body 6 is connected to the control device 31 to which the commercial AC power supply 37 is supplied, and a power switch (not shown) of the control device 31 is closed. When the power switch is closed, a constant frequency AC voltage is applied from the control device 31 to the external electrode 15 via the lead wire 27.
【0038】次に、制御装置31に接続された液面検知装
置本体6を、液面センサ13を点検口4から導出管3を介
して挿入し、当接面11が点検口4の周縁の導出管3の上
端に当接するまで挿入する。なお、この挿入の際、接続
部12は、弾性を有するため、屈曲する導出管3の屈曲に
対応して屈曲し、液面センサ13はオイルパン1に挿入さ
れてオイル2に浸漬される。Next, the liquid level sensor main body 6 connected to the control device 31 is inserted with the liquid level sensor 13 from the inspection port 4 through the outlet pipe 3, and the contact surface 11 is formed on the periphery of the inspection port 4. Insert it until it comes into contact with the upper end of the outlet pipe 3. During this insertion, since the connecting portion 12 has elasticity, the connecting portion 12 bends in accordance with the bending of the bent outgoing pipe 3, and the liquid level sensor 13 is inserted into the oil pan 1 and immersed in the oil 2.
【0039】また、液面センサ13の浸漬により、外部電
極15の接続部12との基端側の基端流通孔16a から外部電
極15と内部電極20との間の絶縁間隙21内の空気などが排
気されるとともに、オイル2が外部電極15の先端側の先
端流通孔16b から絶縁間隙21に浸入する。さらに、液面
センサ13の先端に設けた保護キャップ25内に流入孔26を
介してオイル2が流入する。The immersion of the liquid level sensor 13 causes the air or the like in the insulating gap 21 between the external electrode 15 and the internal electrode 20 to pass through the proximal end communication hole 16a on the proximal side with the connection portion 12 of the external electrode 15. Is discharged, and the oil 2 penetrates into the insulating gap 21 through the distal end flow hole 16b on the distal end side of the external electrode 15. Further, the oil 2 flows into the protection cap 25 provided at the tip of the liquid level sensor 13 through the inflow hole 26.
【0040】そして、保護キャップ25内に配設された温
度検出手段24によりオイル2の温度が検出されて、この
検出された所定の電気信号が電線29を介して制御装置31
に伝送される。さらに、外部電極15および内部電極20間
に浸入したオイル2により外部電極15および内部電極20
間の誘電率による静電容量の電位がリード線27を介して
制御装置31に伝送される。Then, the temperature of the oil 2 is detected by the temperature detecting means 24 provided in the protective cap 25, and the detected predetermined electric signal is transmitted via the electric wire 29 to the control device 31.
Is transmitted to Furthermore, the oil 2 that has entered between the external electrode 15 and the internal electrode 20 causes the external electrode 15 and the internal electrode 20 to move.
The potential of the capacitance due to the dielectric constant therebetween is transmitted to the control device 31 via the lead wire 27.
【0041】この液面センサ13からの静電容量の電位
が、制御装置31の制御回路32にて温度検出手段24からの
電気信号により温度補正されて、温度検出手段24の電気
信号および温度補正された静電容量の電位は表示部34で
表示されるとともに、A/Dコンバータ33によりデジタ
ル信号に変換されてインターフェース35を介して演算記
憶装置36に伝送し、演算記憶装置36で各種処理および記
録を行う。The potential of the capacitance from the liquid level sensor 13 is temperature-corrected by the control circuit 32 of the control device 31 by the electric signal from the temperature detecting means 24, and the electric signal of the temperature detecting means 24 and the temperature correction The displayed potential of the capacitance is displayed on the display unit 34, is converted into a digital signal by the A / D converter 33, and is transmitted to the operation storage device 36 via the interface 35. Make a record.
【0042】なお、温度変化によりオイル2の誘電率が
変化するため、静電容量の電位が変化する。このため、
静電容量の電位を温度補正する。Since the dielectric constant of the oil 2 changes due to the temperature change, the potential of the capacitance changes. For this reason,
The potential of the capacitance is corrected for temperature.
【0043】次に、直径が約2mmの流通孔16を液面セン
サ13に設けた液面検知装置本体6を用いて、液面位置の
測定を行った結果を図7を参照して説明する。Next, the result of measuring the liquid level using the liquid level detecting device main body 6 in which the flow hole 16 having a diameter of about 2 mm is provided in the liquid level sensor 13 will be described with reference to FIG. .
【0044】なお、図7において、縦軸は静電容量の電
位、横軸はオイルパン1内の液面位置を示し、外気温度
約23℃で測定を行った。In FIG. 7, the vertical axis indicates the potential of the capacitance, and the horizontal axis indicates the liquid level position in the oil pan 1. The measurement was performed at an outside air temperature of about 23 ° C.
【0045】そして、測定は、液面センサ13を点検口4
から挿入し、当接面11が導出管3の上端縁に当接した時
点での液面位置と、当接面11が導出管3の上端縁に当接
してから3秒後の液面位置と、当接面11が導出管3の上
端縁に当接してから10秒後の液面位置と測定し、比較
した。Then, the measurement is performed by checking the liquid level sensor 13 with the inspection port 4.
Inserted from the liquid level position at the time the contact surface 11 is in contact with the upper edge of the outlet pipe 3, the liquid level position after 3 seconds from the contact surface 11 abuts the upper edge of the outlet pipe 3 And the liquid surface position 10 seconds after the contact surface 11 came into contact with the upper end edge of the outlet pipe 3 was measured and compared.
【0046】この図7に示す結果から、流通孔が直径約
2mm程度の開口であれば、直ちに液面が測定できること
が分かり、測定が短時間で容易に測定できることが分か
る。さらに、3秒後の測定結果と10秒後の測定結果が
ほぼ一致し、3秒以上液面センサ13をオイル2に浸漬さ
せることにより、mm単位まで高精度に液面位置を測定で
きることが分かる。なお、自動車の出荷時の検査など
で、短時間に高精度の液面位置の測定結果を効率よく容
易に得るためには、さらに先端流通孔16b の開口の径寸
法を大きく形成すればよい。From the results shown in FIG. 7, it can be seen that the liquid level can be measured immediately if the flow hole is an opening having a diameter of about 2 mm, and that the measurement can be easily performed in a short time. Furthermore, the measurement result after 3 seconds and the measurement result after 10 seconds are almost the same, and it is understood that the liquid level position can be measured with high accuracy down to the millimeter unit by immersing the liquid level sensor 13 in the oil 2 for 3 seconds or more. . In order to efficiently and easily obtain a highly accurate measurement result of the liquid surface position in a short time in an inspection at the time of shipping of an automobile or the like, the diameter of the opening of the front end circulation hole 16b may be further increased.
【0047】上記実施例は、軸方向に摺動可能に位置決
め手段10を設けた把持部7に、位置決め手段10の端面に
設けた当接面11側から弾性を有する管状の接続部12を突
設し、この接続部12の先端に液面センサ13を設け、位置
決め手段10の当接面11が導出管3の点検口4に当接する
まで、導出管3の屈曲に対応して接続部12を屈曲させつ
つ、液面センサ13を点検口4から導出管3を介してオイ
ルパン1内に挿入して、オイルパン1内に収容したオイ
ル2に浸漬させる。In the above embodiment, an elastic tubular connecting portion 12 protrudes from the gripping portion 7 provided with the positioning means 10 slidably in the axial direction from the contact surface 11 provided on the end face of the positioning means 10. A liquid level sensor 13 is provided at the tip of the connecting portion 12, and the connecting portion 12 corresponding to the bending of the outlet pipe 3 is kept until the contact surface 11 of the positioning means 10 contacts the inspection port 4 of the outlet pipe 3. The liquid level sensor 13 is inserted into the oil pan 1 from the inspection port 4 through the outlet pipe 3 while being bent, and is immersed in the oil 2 stored in the oil pan 1.
【0048】そして、この液面センサ13の浸漬により、
液面センサ13の筒状の外部電極15の先端流通孔16b から
外部電極15とこの外部電極15に同軸に収容した筒状の内
部電極20との間の絶縁間隙21内にオイル2が浸入し、外
部電極15に印加される定周波数の交流電圧により外部電
極15および内部電極20間のオイル2量により静電容量が
変化するため電位が変化し、内部電極20から接続部12の
内部に配設されたリード線27を介して検出される。さら
に、液面センサ13の先端に設けた温度検出手段24により
オイル2の温度が、接続部12および内部電極20の内部に
配設された電線29を介して検出され、この温度検出によ
り温度変化により生じた誘電率の変化による静電容量の
変化を制御装置31にて補正し、補正した電位をオイルパ
ン1内の液面位置として表示部34に表示させることによ
り液面位置が測定できる。Then, by immersing the liquid level sensor 13,
Oil 2 penetrates into the insulating gap 21 between the external electrode 15 and the cylindrical internal electrode 20 housed coaxially with the external electrode 15 through the front end circulation hole 16b of the cylindrical external electrode 15 of the liquid level sensor 13. The potential changes because the capacitance changes due to the amount of oil between the external electrode 15 and the internal electrode 20 due to the constant frequency AC voltage applied to the external electrode 15, and the potential changes from the internal electrode 20 to the connection portion 12. It is detected through the provided lead wire 27. Further, the temperature of the oil 2 is detected by the temperature detecting means 24 provided at the tip of the liquid level sensor 13 via the electric wire 29 disposed inside the connecting portion 12 and the internal electrode 20. The change in the capacitance due to the change in the dielectric constant caused by the above is corrected by the control device 31, and the corrected potential is displayed on the display unit 34 as the liquid level in the oil pan 1 so that the liquid level can be measured.
【0049】すなわち、温度変化によりオイル2の例え
ば誘電率が変化して静電容量が変化して電位が変化する
ので、温度検出手段24にて検出した温度にて静電容量の
電位を温度補正することにより、高精度な液面位置を検
知できる。That is, for example, the dielectric constant of the oil 2 changes due to a change in temperature, the capacitance changes, and the potential changes. Therefore, the potential of the capacitance is corrected by the temperature detected by the temperature detecting means 24. By doing so, a highly accurate liquid level position can be detected.
【0050】一方、接続管12が弾性を有し管状であるた
め、リード線27や電線29を内部に収容でき接続部12の外
部に露出することにより外観が損なわれることがなく、
接続部12の導出管3への挿入の際の摩擦によるリード線
27および電線29の損傷を防止できる。さらに、導出管3
の屈曲に対応して接続部12が屈曲するので導出管3の屈
曲状態を問わずに測定できる。また、液面センサ13を挿
入するのみで液面センサ13の静電容量の電位により短時
間で高精度な液面位置の測定が容易にできる。On the other hand, since the connecting tube 12 is tubular with elasticity, the lead wire 27 and the electric wire 29 can be accommodated inside and the appearance is not impaired by being exposed to the outside of the connecting portion 12.
Lead wire due to friction when connecting part 12 is inserted into outlet pipe 3
27 and the electric wire 29 can be prevented from being damaged. Furthermore, the outflow pipe 3
Since the connecting portion 12 bends in accordance with the bending of the lead tube 3, the measurement can be performed regardless of the bending state of the outlet tube 3. Further, only by inserting the liquid level sensor 13, it is possible to easily measure the liquid level position with high accuracy in a short time by the electric potential of the capacitance of the liquid level sensor 13.
【0051】さらに、位置決め手段10に当接面11を設
け、この位置決め手段10を把持部7に突設した接続部12
の軸方向に沿って摺動可能に設けたため、位置決め手段
10を摺動移動させるのみで、オイルパン1や導出管3の
形状が異なる場合でも高精度に液面位置を容易に測定で
き、汎用性を向上できる。Further, the positioning means 10 is provided with an abutment surface 11, and this positioning means 10
Slidable along the axial direction of the
The liquid level can be easily measured with high accuracy even when the shapes of the oil pan 1 and the outlet pipe 3 are different by simply sliding the 10, so that the versatility can be improved.
【0052】なお、上記実施例において、位置決め手段
10の当接面11にスイッチを設け、液面の検出の際、当接
面11が導出管3の上端縁に当接した際にスイッチが閉成
し、液面の検出を行うようにしてもよい。このようにス
イッチを設けることにより、基準面となる当接面11が確
実に点検口4を開口する導出管3の上端縁に当接し、液
面の位置を高精度に容易に測定できる。In the above embodiment, the positioning means
A switch is provided on the contact surface 11 of 10 so that when the liquid surface is detected, the switch is closed when the contact surface 11 comes into contact with the upper edge of the outlet pipe 3 so that the liquid surface is detected. Is also good. By providing the switch in this manner, the contact surface 11 serving as the reference surface surely comes into contact with the upper end edge of the outlet pipe 3 that opens the inspection port 4, and the position of the liquid surface can be easily measured with high accuracy.
【0053】また、接続部12が突設された側と反対側の
把持部7の端部に圧縮空気が導入されるホースを接続
し、把持部7に設けた操作手段により把持部7内に配設
した弁体を開いて、液面センサ13の外部電極15と内部電
極20との間の絶縁間隙21に圧縮空気を吹き付け、絶縁間
隙21内に残るオイル2などの導電性の液体を吹き出し、
次の液面の検出に迅速に移れるようにしてもよい。A hose through which compressed air is introduced is connected to the end of the grip 7 on the side opposite to the side where the connecting portion 12 protrudes, and the operation means provided on the grip 7 allows the hose to enter the grip 7. Opening the disposed valve element, blowing compressed air into the insulating gap 21 between the external electrode 15 and the internal electrode 20 of the liquid level sensor 13, and blowing out a conductive liquid such as oil 2 remaining in the insulating gap 21. ,
It may be possible to promptly move to the detection of the next liquid level.
【0054】さらに、利用者が常に運転席から液面の位
置を確認できるように、運転席のパネル面に表示部34が
位置するように制御装置31を自動車に配設し、上記実施
例の液面検知装置本体6を導出管3に装着した状態で出
荷し、保守点検などの際のオイル2の状態を確認する場
合には、液面検知装置本体6を導出管3から引き抜き、
液面センサ13の外部電極15の外周面に付着するオイル2
の色などを観察できるようにしてもよい。Further, the control device 31 is arranged on the vehicle so that the display unit 34 is located on the panel surface of the driver's seat so that the user can always confirm the position of the liquid level from the driver's seat. In order to check the state of the oil 2 at the time of maintenance and inspection, the liquid level detection device main body 6 is pulled out of the discharge tube 3 when the product is shipped with the liquid level detection device main body 6 attached to the discharge pipe 3.
Oil 2 adhering to the outer peripheral surface of the external electrode 15 of the liquid level sensor 13
May be observed.
【0055】なお、このように自動車に液面検知装置本
体6を装着する場合には、外部電極15内のオイル2の液
面の振動により変化をするために、先端流通孔16b の孔
径を小さくし、オイル2の流通抵抗を大きくしてオイル
2の液面を安定させ、自動車の走行の際の振動などによ
り液面が上下動することにより液面位置の表示が目まぐ
るしく変動しないように、オイル2が絶縁間隙21に流入
可能な程度の小径、例えば直径が2mm以下となるように
形成することが好ましい。When the liquid level detecting device main body 6 is mounted on the automobile as described above, the diameter of the front end flow hole 16b is reduced because the liquid level changes due to the vibration of the liquid level of the oil 2 in the external electrode 15. Then, the flow resistance of the oil 2 is increased to stabilize the liquid level of the oil 2, and the oil level is prevented from fluctuating rapidly due to the liquid level moving up and down due to vibrations during driving of the automobile. 2 is preferably formed so as to have a small diameter such that it can flow into the insulating gap 21, for example, a diameter of 2 mm or less.
【0056】[0056]
【発明の効果】請求項1記載の液面検知装置によれば、
長手状の把持部の長手方向に沿って摺動可能な位置決め
手段により液面センサを液体内の所定位置に挿入して、
液体を外部電極内の内部電極との絶縁間隙に収容し、外
部電極および内部電極間の静電容量を測定して液面を検
知するため、液面センサを位置決め手段にて所定位置と
なるように液体内に挿入するのみで、容易に短時間で高
精度に液面位置を検知できる。また、位置決め手段を長
手状の把持部の長手方向に沿って摺動可能に設けたた
め、位置決め手段を摺動移動させるのみで、液面の検知
箇所を問わず液面を容易で高精度に検知可能となり、汎
用性を向上できる。 According to the liquid level detecting device of the first aspect,
The liquid level sensor is inserted in place in the liquid by slidable positioning means along the longitudinal direction of the elongate gripping portion,
The liquid is stored in an insulating gap between the internal electrode and the internal electrode in the external electrode, and the liquid level sensor is positioned at a predetermined position by the positioning means to detect the liquid level by measuring the capacitance between the external electrode and the internal electrode. The liquid surface position can be easily detected in a short time with high accuracy simply by inserting the liquid level into the liquid. In addition, long positioning means
Slidable along the longitudinal direction of the hand-shaped grip
Only by sliding the positioning means.
The liquid level can be detected easily and with high accuracy regardless of the location.
Usability can be improved.
【0057】請求項2記載の液面検知装置によれば、請
求項1記載の液面検知装置において、把持部に液面セン
サを弾性を有する管状の接続部を介して接続したため、
例えば液面の検知箇所が屈曲する場合でも、接続部を液
面の検知箇所の屈曲に対応して屈曲させつつ、液面セン
サを位置決め手段にて所定位置となるように液体内に挿
入するのみで、容易に短時間で高精度に液面位置を検知
できる。また、接続部が管状であるため、外部電極およ
び内部電極間の静電容量の電位を伝達するリード線を接
続部内に配設でき、リード線が露出することなく液面の
検知箇所の摩擦・屈曲などによるリード線の損傷を防止
できる。 According to the liquid level detecting device of the second aspect, in the liquid level detecting device of the first aspect, the liquid level sensor is connected to the grip portion via the elastic tubular connecting portion.
For example, even when the detection part of the liquid level is bent, the connection part is bent in correspondence with the bending of the detection part of the liquid level, and the liquid level sensor is simply inserted into the liquid so as to be at a predetermined position by the positioning means. Thus, the liquid level can be easily detected in a short time with high accuracy. In addition, since the connection portion is tubular, a lead wire for transmitting the potential of the capacitance between the external electrode and the internal electrode can be disposed in the connection portion, and the lead wire is not exposed, so that the friction at the liquid level detection point can be reduced. Ru prevents <br/> damage leads due bending.
【0058】請求項3記載の液面検出装置によれば、液
体内に液面センサが挿入された請求項1または2記載の
液面検知装置に、電源手段により液面センサの外部電極
および内部電極間に交流電圧を印加し、この電源手段に
より印加された電圧に基づき外部電極および内部電極間
の静電容量を静電容量検出手段にて検出し、この静電容
量検出手段で検出した静電容量に基づき液面検知手段に
より液面を検知するため、液面センサを位置決め手段に
て所定位置となるように液体内に挿入するのみで、容易
に短時間で高精度に液面位置を検知できる。According to a third aspect of the present invention, there is provided a liquid level detecting apparatus according to the first or second aspect, wherein the liquid level sensor is inserted into the liquid. An AC voltage is applied between the electrodes, and the capacitance between the external electrode and the internal electrode is detected by the capacitance detecting means based on the voltage applied by the power supply means. Since the liquid level is detected by the liquid level detecting means based on the electric capacity, the liquid level sensor can be easily and accurately detected in a short time simply by inserting the liquid level sensor into the liquid so as to be at a predetermined position by the positioning means. Can be detected.
【0059】請求項4記載の液面検出装置は、請求項3
記載の液面検出装置において、温度検出手段にて液体の
温度を検出し、この温度検出手段で検出した液面の温度
に基づき温度補正手段により液面検知手段で検知した液
面を補正するため、容易に短時間で高精度に液面位置を
検知できる。According to a fourth aspect of the present invention, there is provided a liquid level detecting apparatus according to the third aspect.
In the liquid level detecting device described above, the temperature of the liquid is detected by the temperature detecting means, and the liquid level detected by the liquid level detecting means is corrected by the temperature correcting means based on the temperature of the liquid level detected by the temperature detecting means. The liquid surface position can be detected easily and in a short time with high accuracy.
【図1】本発明の液面検出装置の一実施例を示す一部を
欠いた平面図である。FIG. 1 is a plan view showing a liquid level detecting device according to an embodiment of the present invention, with a part thereof being omitted.
【図2】同上液面センサ近傍を示す平面図である。FIG. 2 is a plan view showing the vicinity of a liquid level sensor according to the first embodiment.
【図3】同上断面図である。FIG. 3 is a sectional view of the same.
【図4】同上正面図である。FIG. 4 is a front view of the same.
【図5】同上液面検知装置本体の使用状況を示す説明図
である。FIG. 5 is an explanatory diagram showing a usage state of the liquid level detection device main body.
【図6】同上制御装置を示すブロック図である。FIG. 6 is a block diagram showing a control device of the same.
【図7】同上測定結果を示すグラフである。FIG. 7 is a graph showing the results of the measurement.
【図8】従来例の液面検出装置の一実施例を示す一部を
切り欠いた平面図である。FIG. 8 is a partially cutaway plan view showing one embodiment of a conventional liquid level detection device.
【図9】同上液面検知装置本体の使用状況を示す説明図
である。FIG. 9 is an explanatory diagram showing a usage state of the liquid level detection device main body.
2 液体であるオイル 6 液面検知装置本体 7 把持部 10 位置決め手段 12 接続部 13 液面センサ 15 外部電極 16a 基端流通孔 16b 先端流通孔 20 内部電極 21 絶縁間隙 24 温度検出手段 30 液面検出装置 2 Liquid oil 6 Liquid level detector main body 7 Grasping part 10 Positioning means 12 Connecting part 13 Liquid level sensor 15 External electrode 16a Base flow hole 16b Tip flow hole 20 Internal electrode 21 Insulation gap 24 Temperature detection means 30 Liquid level detection apparatus
フロントページの続き (72)発明者 大村 正人 静岡県浜松市高塚町300番地 スズキ株 式会社内 (72)発明者 伊藤 衛 静岡県浜松市高塚町300番地 スズキ株 式会社内 (72)発明者 栗田 良祐 静岡県浜松市高塚町300番地 スズキ株 式会社内 (72)発明者 坪井 正隆 静岡県浜松市神田町1195番地 浜松貿易 株式会社内 (72)発明者 山本 光雄 静岡県浜松市古川町500番地 株式会社 ソミック石川 浜松工場内 (56)参考文献 特開 昭63−157018(JP,A) 特開 昭56−64619(JP,A) 実開 昭57−166128(JP,U) 実開 昭63−93519(JP,U) 実開 平4−102435(JP,U) (58)調査した分野(Int.Cl.7,DB名) G01F 23/04 G01F 23/26 Continued on the front page (72) Inventor Masato Omura 300 Takatsukacho, Hamamatsu-shi, Shizuoka Suzuki Co., Ltd. (72) Inventor Mamoru Itoh 300 Takatsukacho, Hamamatsu-shi, Shizuoka Suzuki Co., Ltd. (72) Inventor Kurita Ryosuke 300 Takatsukacho, Hamamatsu-shi, Shizuoka Suzuki Corporation (72) Inventor Masataka Tsuboi 1195 Kanda-cho, Hamamatsu-shi, Shizuoka Hamamatsu Trading Co., Ltd. (72) Mitsuo Yamamoto 500 Furukawacho, Hamamatsu-shi, Shizuoka Co., Ltd. Somic Ishikawa Hamamatsu Plant (56) References JP-A-63-157018 (JP, A) JP-A-56-64619 (JP, A) Fully open 57-166128 (JP, U) Really open 63-93519 (JP, U) JP, U) Hikaru Hei 4-102435 (JP, U) (58) Fields surveyed (Int. Cl. 7 , DB name) G01F 23/04 G01F 23/26
Claims (4)
および基端部に気液交換用の先端流通孔および基端流通
孔が形成された筒状の外部電極、および、この外部電極
に対して絶縁間隙を介して外部電極内の軸方向に沿って
設けられた長手状の内部電極を備え前記液体内に挿入さ
れる液面センサと、 この液面センサに接続された長手状の把持部と、 この把持部にこの把持部の長手方向に沿って摺動可能に
設けられて前記液面センサの位置を所定位置に設定する
位置決め手段とを具備したことを特徴とする液面検知装
置。1. A cylindrical external electrode capable of accommodating a liquid having a dielectric property and having a front end and a base end formed with a front end flow hole and a base end flow hole for gas-liquid exchange, and A liquid level sensor provided with a longitudinal internal electrode provided along the axial direction in the external electrode via an insulating gap, and a liquid level sensor inserted into the liquid; and a longitudinal grip connected to the liquid level sensor And a positioning means provided on the gripper so as to be slidable along the longitudinal direction of the gripper and for setting the position of the liquid level sensor at a predetermined position. Liquid level detection device.
状の接続部を介して接続されたことを特徴とする請求項
1記載の液面検知装置。Wherein gripper, the liquid level sensor is a liquid level sensing apparatus according to claim 1, characterized in that it is connected via the connection portion of the tubular having elasticity.
と、 液面センサの外部電極および内部電極間に交流電圧を印
加する電源手段と、 この電源手段により印加された電圧に基づき前記外部電
極および前記内部電極間の静電容量を検出する静電容量
検出手段と、この静電容量検出手段で検出された静電容
量に基づき液面を検知する液面検知手段とを具備したこ
とを特徴とする液面検出装置。3. A liquid level detecting device according to claim 1 or 2, a power supply means for applying an AC voltage between an external electrode and an internal electrode of the liquid level sensor, and said external device based on a voltage applied by said power supply means. Capacitance detecting means for detecting a capacitance between an electrode and the internal electrode, and liquid level detecting means for detecting a liquid level based on the capacitance detected by the capacitance detecting means. Characteristic liquid level detection device.
度を検出する温度検出手段と、この温度検出手段で検出
された液面の温度に基づき液面検知手段で検知された液
面を補正する温度補正手段とを具備したことを特徴とす
る請求項3記載の液面検出装置。4. A temperature detecting means mounted near the liquid level sensor for detecting the temperature of the liquid, and correcting the liquid level detected by the liquid level detecting means based on the temperature of the liquid level detected by the temperature detecting means. 4. The liquid level detecting device according to claim 3 , further comprising a temperature correcting unit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP05214094A JP3179959B2 (en) | 1994-03-23 | 1994-03-23 | Liquid level detector and liquid level detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP05214094A JP3179959B2 (en) | 1994-03-23 | 1994-03-23 | Liquid level detector and liquid level detector |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH07260549A JPH07260549A (en) | 1995-10-13 |
JP3179959B2 true JP3179959B2 (en) | 2001-06-25 |
Family
ID=12906577
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Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP05214094A Expired - Fee Related JP3179959B2 (en) | 1994-03-23 | 1994-03-23 | Liquid level detector and liquid level detector |
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JP (1) | JP3179959B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010066122A (en) * | 2008-09-10 | 2010-03-25 | Nissei Plastics Ind Co | Liquid level detecting device for tank |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2763124B1 (en) * | 1997-05-09 | 1999-07-23 | Manotec Solution | SYSTEM AND METHOD FOR CAPACITIVE LEVEL MEASUREMENT OF A LIQUID IN A CONTAINER |
KR20010066625A (en) * | 1999-12-31 | 2001-07-11 | 이계안 | Electronic type oil level gauge |
DE102005055610A1 (en) * | 2005-11-22 | 2006-12-14 | Audi Ag | Oil dipstick for measuring oil level in internal combustion engine, has stopper that is designed at slider, where slider is adjustable along rod part and is lockable in set of adjustable positions with regard to rod part |
US8576085B2 (en) * | 2010-01-15 | 2013-11-05 | Tektronix, Inc. | Capacitance-type liquid level measuring probe |
JP5838408B2 (en) | 2011-10-27 | 2016-01-06 | 株式会社生方製作所 | Capacitive liquid level sensor |
GB2559777B (en) * | 2017-02-17 | 2019-05-01 | Ford Global Tech Llc | An engine comprising an engine casing and a dipstick |
JP7428041B2 (en) | 2020-03-25 | 2024-02-06 | 京セラドキュメントソリューションズ株式会社 | Liquid level detection device and image forming device |
JP2024010832A (en) * | 2022-07-13 | 2024-01-25 | 三菱重工業株式会社 | Control device, compression system, and control method |
JP2024073250A (en) * | 2022-11-17 | 2024-05-29 | 出光興産株式会社 | Lubricant condition detector |
-
1994
- 1994-03-23 JP JP05214094A patent/JP3179959B2/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010066122A (en) * | 2008-09-10 | 2010-03-25 | Nissei Plastics Ind Co | Liquid level detecting device for tank |
Also Published As
Publication number | Publication date |
---|---|
JPH07260549A (en) | 1995-10-13 |
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