JPS63210728A - Liquid level measuring instrument - Google Patents
Liquid level measuring instrumentInfo
- Publication number
- JPS63210728A JPS63210728A JP62045692A JP4569287A JPS63210728A JP S63210728 A JPS63210728 A JP S63210728A JP 62045692 A JP62045692 A JP 62045692A JP 4569287 A JP4569287 A JP 4569287A JP S63210728 A JPS63210728 A JP S63210728A
- Authority
- JP
- Japan
- Prior art keywords
- liquid level
- tank
- liquid
- oil storage
- antenna
- 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
- 239000007788 liquid Substances 0.000 title claims abstract description 112
- 238000005259 measurement Methods 0.000 claims description 6
- 238000013500 data storage Methods 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 3
- 238000004364 calculation method Methods 0.000 description 18
- 239000003502 gasoline Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 239000002828 fuel tank Substances 0.000 description 3
- 230000002452 interceptive effect Effects 0.000 description 3
- 239000005341 toughened glass Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000009429 electrical wiring Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、例えば自動車等にガソリンを給油するガソリ
ン給油所に設置している貯油タンク内のガソリンの液量
を測定する装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for measuring the amount of gasoline in a fuel storage tank installed at a gasoline filling station for refueling automobiles and the like.
かかる給油所では、敷地内の地下にガソリンの貯油タン
クを埋設し、該貯油タンクから地上のガソリン給油機に
ガソリンを汲上げて給油を行っている。At such gas stations, a gasoline storage tank is buried underground within the premises, and gasoline is pumped from the tank to a gasoline refueling machine above ground for refueling.
ところで、この貯油タンク内のガソリンの液量は、該貯
油タンクの形状が円筒形であることから、液位に正比例
するものではない。このため、液量を知る手段として、
まず液位を測定しこれを液量に変換する方法では、液量
に変換する際に、タンク形状等に応じて演算する必要が
あり、タンク内の液量を測定する装置としては、貯油タ
ンク側に例えば静電容量式の液位測定手段を設け、給油
所内の事務所などに液量演算表示手段を設けて、前記液
位測定手段からの測定信号を液量演算表示手段に導入し
、ここで液位を液量に変換し、該液量を表示することで
液量を知るようにしている。By the way, the amount of gasoline in this oil storage tank is not directly proportional to the liquid level because the oil storage tank has a cylindrical shape. Therefore, as a means of knowing the liquid volume,
In the method of first measuring the liquid level and converting it to liquid volume, calculations need to be made according to the tank shape etc. when converting to liquid volume. For example, a capacitance type liquid level measuring means is provided on the side, a liquid quantity calculation displaying means is provided in an office in a gas station, etc., and a measurement signal from the liquid level measuring means is introduced to the liquid quantity calculation and displaying means, Here, the liquid level is converted into a liquid volume, and the liquid volume is displayed so that the liquid volume can be known.
そして、従来は、貯油タンク側の液位測定手段と事務所
側の液量演算表示手段とは有線方式で接続している。Conventionally, the liquid level measuring means on the oil storage tank side and the liquid amount calculation display means on the office side are connected by wire.
このため、貯油タンクの液位測定手段と事務所の液量演
算表示手段とを電線で接続する配線工事が必要となり、
電線を地中に埋設するなどの工事のために敷地のコンク
リート面を破壊し、電線埋設後にコンクリート舗装を再
度行わねばならず、液位測定手段や液量演算表示手段の
設置作業に労力と時間を要し面倒であった。特に既設の
給油所にこれらの手段を設置する場合は、配線工事が給
油作業の大きな妨げとなるおそれもある。Therefore, wiring work was required to connect the liquid level measuring means in the oil storage tank and the liquid level calculation display means in the office using electric wires.
Construction work such as burying electric wires underground requires destroying the concrete surface of the site, and re-paving the concrete after burying the wires, which requires a lot of effort and time to install liquid level measurement means and liquid volume calculation display means. It was troublesome. Particularly when installing these means at an existing refueling station, there is a risk that the wiring work will seriously impede refueling operations.
本発明の目的は前記従来例の不都合を解消し、配線工事
が不要で、液位測定手段や液量演算表示手段を既設の給
油所に設置する場合でも簡単に行えてこの間の給油作業
に支障を生じるおそれもない液量測定装置を提供するこ
とにある。The purpose of the present invention is to eliminate the disadvantages of the conventional example, eliminate the need for wiring work, and allow easy installation of liquid level measurement means and liquid amount calculation and display means even when installed in an existing filling station, thereby preventing any hindrance to refueling work during this time. It is an object of the present invention to provide a liquid amount measuring device that is free from the risk of causing problems.
本発明は前記目的を達成するため、貯油タンク近傍に設
けた液面測定手段と、前記貯油クンクから離れた位置に
設けた、前記液面測定手段の出力を表示する表示手段と
を、無線で通信したことを要旨とするものである。In order to achieve the above object, the present invention wirelessly connects a liquid level measuring means provided near the oil storage tank and a display means provided at a position away from the oil storage tank for displaying the output of the liquid level measuring means. The gist is what was communicated.
本発明によれば、貯油タンク側に設けた、貯油タンク内
の液面を測定する液面測定手段と、前記貯油タンクから
離れた位置に設けた、前記液面測定手段の出力を表示す
る表示手段とは無線で通信することとしたので、両手段
を電線を用いて接続する必要がなく、その結果、配線工
事が不要となり簡単に設置できる。According to the present invention, the liquid level measuring means provided on the oil storage tank side measures the liquid level in the oil storage tank, and the display displaying the output of the liquid level measuring means provided at a position away from the oil storage tank. Since it was decided to communicate with the means wirelessly, there is no need to connect the two means using electric wires, and as a result, wiring work is unnecessary and installation is easy.
以下、図面について本発明の実施例を詳細に説明する。 Embodiments of the present invention will be described in detail below with reference to the drawings.
第１図は本発明の液量測定装置の実施例を示す説明図、
第２図は同上要部である検知口の蓋の平面図で、図中１
は給油所の敷地の地下に埋設した貯油タンク、２は敷地
内の事務所などの建物を示し、本発明の液量測定装置は
貯油タンク１側に設ける該貯油タンク内の液位を測定す
る液位測定手段Ａと、この貯油タンク１から離れた建物
２内に設けた液量演算表示手段Ｂとで構成される。FIG. 1 is an explanatory diagram showing an embodiment of the liquid level measuring device of the present invention,
Figure 2 is a plan view of the detection port cover, which is the main part of the same.
2 indicates an oil storage tank buried underground on the premises of the gas station, 2 indicates a building such as an office on the premises, and the liquid level measuring device of the present invention measures the liquid level in the oil storage tank installed on the oil storage tank 1 side. It is composed of a liquid level measuring means A and a liquid amount calculating and displaying means B provided in a building 2 apart from this oil storage tank 1.
液位測定手段Ａとしては、貯油タンク１内に例えば静電
容量式の液位測定極３を配設し、一方、地上に設けた検
知や保守点検に用いる開口４の下方に貯油タンク１に連
通する凹所５を形成し、該凹所５内に前記液位測定極３
の出力端子３ａを顕出する。As the liquid level measuring means A, for example, a capacitance type liquid level measuring electrode 3 is arranged in the oil storage tank 1, and on the other hand, a capacitance type liquid level measuring electrode 3 is arranged in the oil storage tank 1 below an opening 4 provided on the ground and used for detection and maintenance inspection. A communicating recess 5 is formed, and the liquid level measuring electrode 3 is placed in the recess 5.
The output terminal 3a of is exposed.
図中６は開口４の蓋を示し、これは外周部をアンテナ７
となる金属で形成し、中央に電源となる太陽電池８を埋
め込み、その上面を保護用の強化ガラス９で被覆した。In the figure, 6 indicates the lid of the opening 4, which has an outer periphery attached to the antenna 7.
A solar cell 8 serving as a power source was embedded in the center, and its upper surface was covered with a protective tempered glass 9.
そして、前記凹所５内にバッテリー１０とマイクロコン
ピュータなどを利用した制御装置１１とを収め、前記液
位測定極３の出力端子３ａをバッテリー１０と制御装置
１１とに接続し、また、太陽電池８をバッテリー１０に
、アンテナ７を制御装置１１にそれぞれ接続する。なお
、太陽電池８から直接出力端子３ａと制御装置１１とに
接続することもできる。A battery 10 and a control device 11 using a microcomputer or the like are housed in the recess 5, and the output terminal 3a of the liquid level measuring electrode 3 is connected to the battery 10 and the control device 11. 8 is connected to the battery 10, and the antenna 7 is connected to the control device 11. Note that the solar cell 8 can also be directly connected to the output terminal 3a and the control device 11.
かかる液位測定手段Ａを設けた貯油タンク１を敷地内に
複数個埋設する。A plurality of oil storage tanks 1 provided with such liquid level measuring means A are buried within the premises.
液量演算表示手段Ｂとしては、アンテナ１２を取付けた
表示盤１３に、表示部として液量表示器１４と、当該液
量が表示されている貯油タンクｌのタンク番号を示すタ
ンク番号表示器１５と、貯油タンク１へのガソリン補給
時に満タンを報知する報知ランプ１６と、自動車等への
給油により所定値以下にタンク内残量が減少したことを
報知する報知ランプ１７とを設け、操作部として複数個
ある貯油タンク１のうち、液量を表示しようとする貯油
タンク１を選択指定するタンク指定スイッチ１８を設け
た。The liquid quantity calculation display means B includes a display panel 13 to which an antenna 12 is attached, a liquid quantity indicator 14 as a display part, and a tank number indicator 15 indicating the tank number of the oil storage tank l whose liquid quantity is displayed. A notification lamp 16 is provided to notify that the fuel storage tank 1 is full when refueling with gasoline, and a notification lamp 17 is provided to notify that the remaining amount in the tank has decreased below a predetermined value due to refueling a car etc. A tank designation switch 18 is provided to select and designate the oil storage tank 1 whose liquid level is to be displayed among the plurality of oil storage tanks 1.
こうして第３図のブロック図に示すように、液位測定手
段Ａとしては液位測定極３からのアナログ液位信号を制
御装置１１内の測定手段１９に導入し、ここでデジタル
信号に変換されたデジタル液位信号を同じ制御装置１１
内の発信手段２０を介してアンテナ７に導入する。In this way, as shown in the block diagram of FIG. 3, the liquid level measuring means A introduces the analog liquid level signal from the liquid level measuring electrode 3 into the measuring means 19 in the control device 11, where it is converted into a digital signal. The digital liquid level signal is sent to the same control device 11.
The signal is introduced into the antenna 7 via the transmitting means 20 inside.
一方、液量演算表示手段Ｂ側のタンク指定手段２１から
の各貯油タンク１に対する指定信号を発信手段２２を介
してアンテナ１２に導入し、該アンテナ１２から液位測
定手段Ａ側のアンテナ７に導入されたタンク指定信号を
受信手段２３に導入し、ここからの出力を発信手段２０
に導入した。On the other hand, a designation signal for each oil storage tank 1 from the tank designation means 21 on the side of the liquid volume calculation and display means B is introduced to the antenna 12 via the transmission means 22, and from the antenna 12 to the antenna 7 on the side of the liquid level measurement means A. The introduced tank designation signal is introduced into the receiving means 23, and the output from here is sent to the transmitting means 20.
It was introduced in
また、アンテナ１２からのデジタル液位信号を受信手段
２４を介して演算手段２５に導入するとともに、各貯油
タンク１毎の液位を液量に演算する計算式が記憶しであ
るタンクデータ記憶手段２６からのデータ信号を演算手
段２５に導入し、該演算手段２５からの液量信号を液量
記憶手段２７に導入する。Further, the digital liquid level signal from the antenna 12 is introduced into the calculation means 25 via the reception means 24, and the tank data storage means stores a calculation formula for calculating the liquid level of each oil storage tank 1 into liquid volume. The data signal from 26 is introduced into the calculation means 25, and the liquid volume signal from the calculation means 25 is introduced into the liquid volume storage means 27.
一方、各貯油タンク１毎の最低液量（例えば１ｋｌ）と
最高液量（例えば容Ｍ１０Ｉｄタンクの場合は９＆７）
とが記憶しである液量データ記憶手段２８からのデータ
信号と、前記液量記憶手段２７からの液量信号とを比較
手段２９に導入し、ここからの出力信号を報知ランプ１
６．１７に導入する。On the other hand, the minimum liquid volume (for example, 1kl) and the maximum liquid volume (for example, 9 & 7 for a M10Id tank) for each oil storage tank 1.
The data signal from the liquid volume data storage means 28 and the liquid volume signal from the liquid volume storage means 27 are introduced into the comparison means 29, and the output signal from there is sent to the notification lamp 1.
Introduced on 6.17.
タンクを旨定スイッチ１８からの出力信号と液量記憶手
段２７からの液量信号を切換手段３０に導入し、該切換
手段３０からの出力信号を液量表示器１４．タンク番号
表示器１５に導入した。The output signal from the tank determining switch 18 and the liquid volume signal from the liquid volume storage means 27 are introduced into the switching means 30, and the output signal from the switching means 30 is input to the liquid volume indicator 14. It was introduced into the tank number display 15.
次に使用法及び動作について説明すると、複数個設置さ
れている各貯油タンク１に設けた液位測定手段Ａでは、
常時、液位測定極３で測定されているアナログ液位信号
が測定手段１９に入り、ここでＡ／Ｄ変換されて、デジ
タル液位信号として発信手段２０に出力されている。Next, to explain the usage and operation, the liquid level measuring means A installed in each of the plural oil storage tanks 1,
At all times, an analog liquid level signal measured by the liquid level measuring electrode 3 enters the measuring means 19, where it is A/D converted and outputted to the transmitting means 20 as a digital liquid level signal.
一方、液量演算表示手段Ｂ側のタンク指定手段２１から
の各タンクへのタンク指定信号が発信手段２２、アンテ
ナ１２を介して順次各貯油タンク１側のアンテナ７から
受信手段２３に入り、当該貯油タンク１の指定信号を受
けた、例えば１番目の貯油タンク１側では、該受信手段
２３から発信手段２０に出力し、該発信手段２０ではこ
の出力をうけて測定手段１９からのデジタル液位信号を
アンテナ７から発信する。On the other hand, a tank designation signal to each tank from the tank designation means 21 on the side of the liquid volume calculation display means B is sent via the transmitting means 22 and the antenna 12 to the reception means 23 from the antenna 7 on the side of each oil storage tank 1 in order. For example, on the side of the first oil storage tank 1 that receives the designation signal for the oil storage tank 1, the receiving means 23 outputs the signal to the transmitting means 20, and the transmitting means 20 receives this output and outputs the digital liquid level from the measuring means 19. A signal is transmitted from antenna 7.
この時、液位測定手段Ａの電源として、太陽光線による
太陽電池８を使用するから節電に役立つ。At this time, the solar cell 8 using sunlight is used as a power source for the liquid level measuring means A, which helps in power saving.
そして、太陽電池８は開口の蓋６内に埋込んだので地上
に突出せず自動車の走行を妨げるおそれもなく、また、
該太陽電池８の上面は強化ガラス９で保護されるからこ
の上を自動車が走行しても破損する心配もない。Since the solar cell 8 is embedded in the lid 6 of the opening, it does not protrude above the ground and there is no risk of interfering with the driving of the car.
Since the upper surface of the solar cell 8 is protected by a tempered glass 9, there is no fear that it will be damaged even if a car runs on it.
また、アンテナ７についても開口の蓋６の一部としてこ
れを形成したので、前記太陽電池８と同様に地上に突出
せず自動車の走行を妨げるおそれがない。Further, since the antenna 7 is also formed as a part of the lid 6 of the opening, it does not protrude above the ground like the solar cell 8 and there is no risk of interfering with the running of the automobile.
こうして、液位測定手段Ａ側のアンテナ７から発信され
た液位信号は、液量演算表示手段Ｂ側のアンテナ１２、
受信手段２４を介して演算手段２５に入り、ここで当該
貯油タンク１のタンクデータをタンクデータ記憶手段２
６から取出し、測定された液位をタンク形データにより
液量に演算してこの液量を液量記憶手段２７に記憶更新
する。In this way, the liquid level signal transmitted from the antenna 7 on the liquid level measuring means A side is transmitted to the antenna 12 on the liquid amount calculation display means B side,
It enters the calculating means 25 via the receiving means 24, and the tank data of the oil storage tank 1 is stored in the tank data storage means 2.
6, the measured liquid level is calculated into a liquid volume based on the tank type data, and this liquid volume is stored and updated in the liquid volume storage means 27.
このようにして各貯油タンク１，１・・・の液量が順次
測定、記憶更新されるものであるが、次の貯油タンク１
の液量の演算は、第１番目の貯油タンク１の液量の演算
が終了すると、演算手段２５からタンク指定手段２１に
演算終了信号が入るので、この信号をうけてタンク指定
手段２１から発信手段２２へ次の貯油タンク１を指定す
る信号が発せられる。In this way, the liquid level in each oil storage tank 1, 1, etc. is sequentially measured and memorized.
When the calculation of the liquid volume in the first oil storage tank 1 is completed, a calculation completion signal is input from the calculation means 25 to the tank designation means 21. A signal designating the next oil storage tank 1 is sent to the means 22.
記憶更新された最新の液量は、液量記憶手段２７から比
較手段２９に入り、ここで液量デーク記憶手段２８から
の当該貯油タンクｌの最低液量あるいは最高液量と比較
され、例えばガソリン給油機に汲上げられ自動車等へ給
油された結果、貯油タンク１内のガソリンが減少して残
存量が最低液量であるｌｋｌになると報知ランプ１７が
点灯して貯油タンク１ヘガソリンを補給する必要がある
ことを報知する。また、タンクローリ−から貯油タンク
１に補給している場合は、例えば容Ｍ １０ｋｌタンク
ならば最高液量である９ｋｌまで補給したところで報知
ランプ１６が点灯して補給停止を報知する。この場合、
貯油タンク１の容量１０ｋｌよりも１ｋｌ少ない９ｄを
最高液量と設定したのは、オーバーフローを予防するた
めである。The updated liquid level is entered from the liquid level storage means 27 into the comparing means 29, where it is compared with the lowest or highest liquid level in the oil storage tank l from the liquid level storage means 28. When the gasoline in the fuel tank 1 decreases and the remaining amount reaches the minimum liquid level, lkl, as a result of being pumped up by the fuel tank and refueled to a car, etc., the notification lamp 17 lights up and it is necessary to replenish the fuel tank 1 with gasoline. Notify that there is. Further, when the oil storage tank 1 is being refilled from a tank truck, for example, if the tank has a capacity of 10 kl, the notification lamp 16 lights up to notify the stop of replenishment when the maximum liquid level is 9 kl. in this case,
The reason why 9d, which is 1kl smaller than the capacity of the oil storage tank 1 of 10kl, is set as the maximum liquid level is to prevent overflow.
同時に、前記液量記憶手段２７からの液量信号は切換手
段３０に入るので、当該第１番目の貯油タンク１の液量
を知るには、タンク番号「１」箇所のタンク指定スイッ
チ１日を押せば、該タンク指定スイッチ１８からの指定
信号が切換手段３０に入り、ここからの出力で、タンク
番号表示器１５に当該貯油タンク１のタンク番号「１」
が表示されるとともに、液量表示器１４に現在の液量が
表示される。At the same time, the liquid volume signal from the liquid volume storage means 27 is input to the switching means 30, so in order to know the liquid volume in the first oil storage tank 1, press the tank designation switch 1 at the tank number "1". When pressed, a designation signal from the tank designation switch 18 enters the switching means 30, and the output from this causes the tank number display 15 to display the tank number "1" of the oil storage tank 1.
is displayed, and the current liquid level is also displayed on the liquid level display 14.
なお、前記した実施例では、貯油タンク１内の液量が最
低あるいは最高液量に達した時にこれを報知する手段と
して光の点灯によるランプを用いたが、これに限定され
るものではなくブザーなどの音による報知手段を用いて
もよい。In the above-mentioned embodiment, a lamp is used to notify when the liquid level in the oil storage tank 1 reaches the minimum or maximum level, but the lamp is not limited to this, and a buzzer may be used. Sound notification means such as the following may also be used.
以上述べたように本発明の液量測定装置は、貯油タンク
側に設けた貯油タンク内の液位を測定する手段と、前記
貯油タンクから離れた位置に設けた、液位を液量に変換
表示する手段とは無線により通信される′から、電線の
配線工事が不要となり、構造及び設置が容易となって、
設置作業中も給油作業に支障をきたすおそれもないもの
である。As described above, the liquid level measuring device of the present invention includes a means for measuring the liquid level in the oil storage tank provided on the oil storage tank side, and a means provided at a position remote from the oil storage tank for converting the liquid level into a liquid amount. Since the means of display is wireless communication, there is no need for electrical wiring work, and the structure and installation are easy.
There is no risk of interfering with refueling operations during installation.
第１図は本発明の液量測定装置の実施例を示す説明図、
第２図は同上要部である開口の蓋の平面図、第３図は実
施例のブロック図である。
■・・・貯油タンク ２・・・建物
３・・・液位測定極 ３ａ・・・出力端子４・・・開
口 ５・・・凹所
６・・・開口の蓋 ７・・・アンテナ８・・・太陽
電池 ９・・・強化ガラス１０・・・バッテリー
１１・・・制御装置１２・・・アンテナ １３・
・・表示盤１４・・・液量表示器 １５・・・タンク
番号表示器１６、１７・・・報知ランプ
１８・・・タンク指定スイッチ
１９・・・測定手段 ２０・・・発信手段２１・・
・タンク指定手段FIG. 1 is an explanatory diagram showing an embodiment of the liquid level measuring device of the present invention,
FIG. 2 is a plan view of the opening cover, which is the main part of the same, and FIG. 3 is a block diagram of the embodiment. ■... Oil storage tank 2... Building 3... Liquid level measurement pole 3a... Output terminal 4... Opening 5... Recess 6... Opening cover 7... Antenna 8. ...Solar cell 9...Tempered glass 10...Battery
11...Control device 12...Antenna 13.
...Display panel 14...Liquid level indicator 15...Tank number display 16, 17...Notification lamp 18...Tank designation switch 19...Measuring means 20...Transmitting means 21...
・Tank specification means
Claims (1)
クから離れた位置に設けた、前記液面測定手段の出力を
表示する表示手段とを、無線で通信したことを特徴とす
る液面測定装置。Liquid level measurement characterized in that a liquid level measuring means provided near the oil storage tank and a display means provided at a position remote from the oil storage tank for displaying the output of the liquid level measuring means are communicated wirelessly. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62045692A JPH0812100B2 (en) | 1987-02-27 | 1987-02-27 | Liquid level measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62045692A JPH0812100B2 (en) | 1987-02-27 | 1987-02-27 | Liquid level measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63210728A true JPS63210728A (en) | 1988-09-01 |
| JPH0812100B2 JPH0812100B2 (en) | 1996-02-07 |
Family
ID=12726437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62045692A Expired - Fee Related JPH0812100B2 (en) | 1987-02-27 | 1987-02-27 | Liquid level measuring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0812100B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02173525A (en) * | 1988-12-26 | 1990-07-05 | Tokyo Tatsuno Co Ltd | Radio type liquid quantity measuring instrument |
| JPH0368818A (en) * | 1989-08-07 | 1991-03-25 | Tokyo Tatsuno Co Ltd | Radio-type liquid-quantity measuring apparatus |
| JPH0368817A (en) * | 1989-08-07 | 1991-03-25 | Tokyo Tatsuno Co Ltd | Radio-type liquid-level measuring apparatus |
| JP2002245581A (en) * | 2001-02-19 | 2002-08-30 | Nagano Japan Radio Co | Automatic meter-reading system and antenna device |
| JP2011174718A (en) * | 2010-02-23 | 2011-09-08 | Seiko Epson Corp | Interface measurement sensor, interface measurement device, interface measurement system, and interface measurement method |
| JP2012103022A (en) * | 2010-11-08 | 2012-05-31 | Seiko Epson Corp | Measuring sensor, capacitive sensor, and measuring system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4978911A (en) * | 1972-12-07 | 1974-07-30 | ||
| JPS5796221A (en) * | 1980-12-08 | 1982-06-15 | Showa Kiki Kogyo Kk | Sensing system for residual oil level of underground tank for gas station |
-
1987
- 1987-02-27 JP JP62045692A patent/JPH0812100B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4978911A (en) * | 1972-12-07 | 1974-07-30 | ||
| JPS5796221A (en) * | 1980-12-08 | 1982-06-15 | Showa Kiki Kogyo Kk | Sensing system for residual oil level of underground tank for gas station |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02173525A (en) * | 1988-12-26 | 1990-07-05 | Tokyo Tatsuno Co Ltd | Radio type liquid quantity measuring instrument |
| JPH0368818A (en) * | 1989-08-07 | 1991-03-25 | Tokyo Tatsuno Co Ltd | Radio-type liquid-quantity measuring apparatus |
| JPH0368817A (en) * | 1989-08-07 | 1991-03-25 | Tokyo Tatsuno Co Ltd | Radio-type liquid-level measuring apparatus |
| JP2002245581A (en) * | 2001-02-19 | 2002-08-30 | Nagano Japan Radio Co | Automatic meter-reading system and antenna device |
| JP2011174718A (en) * | 2010-02-23 | 2011-09-08 | Seiko Epson Corp | Interface measurement sensor, interface measurement device, interface measurement system, and interface measurement method |
| JP2012103022A (en) * | 2010-11-08 | 2012-05-31 | Seiko Epson Corp | Measuring sensor, capacitive sensor, and measuring system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0812100B2 (en) | 1996-02-07 |
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|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |