KR20020051784A - A sensing device of oil level - Google Patents

A sensing device of oil level Download PDF

Info

Publication number
KR20020051784A
KR20020051784A KR1020000081332A KR20000081332A KR20020051784A KR 20020051784 A KR20020051784 A KR 20020051784A KR 1020000081332 A KR1020000081332 A KR 1020000081332A KR 20000081332 A KR20000081332 A KR 20000081332A KR 20020051784 A KR20020051784 A KR 20020051784A
Authority
KR
South Korea
Prior art keywords
tank
chamber
fluid
float
fuel
Prior art date
Application number
KR1020000081332A
Other languages
Korean (ko)
Inventor
이용달
Original Assignee
이계안
현대자동차주식회사
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 이계안, 현대자동차주식회사 filed Critical 이계안
Priority to KR1020000081332A priority Critical patent/KR20020051784A/en
Publication of KR20020051784A publication Critical patent/KR20020051784A/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/14—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measurement of pressure
    • G01F23/16—Indicating, recording, or alarm devices being actuated by mechanical or fluid means, e.g. using gas, mercury, or a diaphragm as transmitting element, or by a column of liquid
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
    • G01F23/56—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using elements rigidly fixed to, and rectilinearly moving with, the floats as transmission elements
    • G01F23/58—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using elements rigidly fixed to, and rectilinearly moving with, the floats as transmission elements using mechanically actuated indicating means
    • G01F23/585—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using elements rigidly fixed to, and rectilinearly moving with, the floats as transmission elements using mechanically actuated indicating means using pneumatically or hydraulically actuated indicating means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/16—Measuring force or stress, in general using properties of piezoelectric devices

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Level Indicators Using A Float (AREA)

Abstract

PURPOSE: A fluid level sensing apparatus is provided to accurately detect the amount of fluid remaining in the closed tank, regardless of the change of motion of tank. CONSTITUTION: A fluid level sensing apparatus comprises a pressure difference sensor unit(5) including a first chamber(13) for communication of an upper gas(11) in a tank(3), a second chamber(17) closed by a diaphragm(15) connected to a float unit(7), and a piezoelectric member(19) having both sides where the first and second chambers are arranged; the float unit for changing the internal pressure of the second chamber by generating buoyant force in accordance with the depth of the flat unit dipped into a fluid(1) stored in the tank; and a sensor case(9) for fixing the pressure difference sensor unit and the float unit to the tank, and which permits the fluid and gas in the tank to easily acts to the pressure difference sensor unit and the float unit.

Description

유면 높이 감지 장치{A SENSING DEVICE OF OIL LEVEL}A SENSING DEVICE OF OIL LEVEL}

본 발명은 자동차의 연료탱크 등에 사용되어 잔류유량을 측정하는 장치에 관한 것으로서, 보다 상세하게는 탱크에 잔류하고 있는 유체의 유면높이를 보다 정확하게 감지할 수 있도록 하는 장치에 관한 것이다.The present invention relates to a device for measuring the residual flow rate used in a fuel tank of an automobile, and more particularly, to a device for more accurately detecting the oil level of the fluid remaining in the tank.

일반적으로 엔진은 실린더와 실린더 헤드 및 상기 실린더 내에서 왕복 운동하는 피스톤 사이에 형성되는 연소실에서 연료를 연소시켜 발생된 폭발력을 상기 피스톤에 연결된 커넥팅 로드를 통해 크랭크샤프트를 회전시킴으로서 열에너지를 기계적인 회전력으로 변환하는 장치이다.In general, the engine rotates the crankshaft through a connecting rod connected to the piston to explode force generated by burning fuel in a combustion chamber formed between a cylinder and a cylinder head and a piston reciprocating in the cylinder, thereby converting thermal energy into mechanical rotational force. The device to convert.

따라서, 상기와 같은 엔진은 연소실에서 연소될 연료가 지속적으로 공급되어야하며, 상기와 같은 연료의 지속적인 공급을 위해 자동차에는 연료탱크를 구비하고 일정량을 저장할 수 있도록 되어 있다.Therefore, such an engine must continuously supply fuel to be combusted in the combustion chamber, and the fuel tank is provided in the automobile for the continuous supply of such fuel, and a certain amount can be stored.

또한, 운전석의 계기판에는 연료탱크내의 연료량을 검출하여 운전자가 연료를 완전 소모시켜 더 이상 자동차의 운행이 곤란한 경우를 방지하도록 연료게이지와, 연료잔량 경고센서가 설치되어 있다.In addition, the instrument panel of the driver's seat is provided with a fuel gauge and a fuel level warning sensor so as to detect the amount of fuel in the fuel tank and prevent the driver from exhausting the fuel by completely exhausting the fuel.

여기서, 상기 연료게이지는 연료탱크내의 연료량을 지속적으로 운전자에게 제공하도록 연료탱크 내에 설치된 뜨개의 높이 변화에 따라 작동되는 센더저항이 설치되어 그 저항값의 계속적인 변화로 연료량을 즉각적으로 운전자에게 제시하도록 하고 있으며, 상기 연료잔량 경고센서는 연료탱크 내에 설치된 서어미스터의 저항변화에 따라 연료 저장량이 일정량 이하로 저하된 경우에만 경고등이 점등되도록 되어 있다.Here, the fuel gauge is provided with a sender resistor which is operated in accordance with the change in the height of the float installed in the fuel tank to continuously provide the driver with the fuel amount in the fuel tank to promptly present the fuel amount to the driver with the continuous change in the resistance value. The fuel level warning sensor is configured so that a warning light is turned on only when the fuel storage amount is lowered to a predetermined amount or less according to the resistance change of the thermistor installed in the fuel tank.

그런데, 상기한 바와 같은 구조로 연료의 잔량을 감지하는 경우에는 차량의 운행상태에 따라 수시로 변화하는 유면의 높이변화가 조금도 완충되지 않고 그대로 검출되어 연료게이지의 표시상태가 수시로 변화하게되어 운전자는 실질적인 연료의 잔량을 정확히 인지하기에 곤란하다.However, in the case of detecting the remaining amount of fuel with the structure as described above, the height change of the oil level, which changes frequently depending on the driving state of the vehicle, is detected without any buffer and the display state of the fuel gauge changes from time to time. It is difficult to know the remaining amount of fuel accurately.

즉, 도 1에 도시된 바와 같이 유면 A의 상태로부터 차량의 주행상태에 의해 유면 B의 상태로 순간적으로 유면이 변화되는 경우에 상기 유면 A의 상태에 따라 떠있던 뜨개(100)는 자중 및 유면과의 점성에 의해 점선에 도시된 바와 같이 유면 B의 상태를 따라 순간적으로 이동되고, 그 이동상태는 센더저항(102)에 그대로 전해져 저항값이 순간적으로 AΩ에서 BΩ으로 변화되어 결국, 연료게이지(미도시)의 눈금이 지연시간 없이 같이 순간적으로 변화되는 것이다.That is, as shown in FIG. 1, when the surface is changed from the state of the surface A to the state of the surface B instantaneously by the driving state of the vehicle, the float 100 floating according to the state of the surface A is self-weighted and the surface of oil. As shown in the dotted line, due to the viscosity and the instantaneous movement along the state of the oil level B, the movement state is transmitted to the sender resistor 102 as it is, the resistance value is instantaneously changed from A Ω to B 결국 and finally, the fuel gauge ( Not shown) is instantaneously changed without delay.

따라서, 이와 같이 차량의 주행상태에 따라 지나치게 민감하게 변화하는 연료게이지의 상태로는 운전자가 정확한 연료의 잔량을 파악하기에 곤란한 문제점이 있다.Therefore, in the state of the fuel gauge which changes too sensitively according to the driving state of the vehicle, it is difficult for the driver to grasp the exact amount of remaining fuel.

이에 본 발명은 상기한 바와 같은 문제점을 해결하기 위해 안출된 것으로서, 연료탱크 등과 같은 밀폐된 탱크 내에 잔류하고 있는 유체의 양을 탱크의 운동상태가 변화하는 것에 영향 받지 않고 보다 정확하게 검출해 낼 수 있도록 하는 유면 높이 감지 장치를 제공함에 그 목적이 있다.Accordingly, the present invention has been made to solve the above problems, so that the amount of fluid remaining in the closed tank such as fuel tank can be detected more accurately without being affected by the movement state of the tank. It is an object of the present invention to provide an oil level detecting apparatus.

도 1은 종래 기술에 의한 유면 높이 감지 장치의 작동 설명도,1 is an explanatory view of the operation of the oil level sensor according to the prior art,

도 2는 본 발명에 의한 유면 높이 감지 장치를 도시한 구성도이다.Figure 2 is a block diagram showing an oil level sensor according to the present invention.

< 도면의 주요 부분에 대한 부호의 설명 ><Description of Symbols for Main Parts of Drawings>

1: 유체3: 탱크1: fluid 3: tank

5: 차압센서부7: 플로트수단5: differential pressure sensor part 7: float means

9: 센싱케이스11: 기체9: Sensing Case 11: Aircraft

13: 제1체임버15: 다이어프렘13: chamber 1 15: diaphragm

17: 제2체임버19: 압전소자17: second chamber 19: piezoelectric element

21: 작동로드23: 고정플로트21: working rod 23: fixed float

25: 유체출입구27: 기체출입구25: fluid outlet 27: gas outlet

상기한 바와 같은 목적을 달성하기 위한 본 발명 유면 높이 감지 장치는 압전소자의 양측에 형성된 제1,2체임버로 이루어진 차압센서부와, 탱크 내의 유체에 잠긴 깊이에 따라 부력을 발생시켜 상기 제2체임버의 내부압을 변화시키는 플로트수단과, 상기 차압센서부 및 플로트수단을 탱크에 고정 지지하며 탱크내의 유체와 기체가 용이하게 상기 차압센서부 및 플로트수단에 작용하도록 하는 센서케이스로구성된 것을 특징으로 한다.The oil level sensor according to the present invention for achieving the above object is a differential pressure sensor part consisting of first and second chambers formed on both sides of the piezoelectric element, and generates a buoyancy force depending on the depth of the fluid in the tank. Float means for changing the internal pressure of the, and the differential pressure sensor unit and the float means is fixed to the tank, the fluid and gas in the tank is characterized in that it consists of a sensor case for easily acting on the differential pressure sensor unit and float means .

이하, 첨부된 도면을 참조하여 본 발명 유면 높이 감지 장치를 설명하면 다음과 같다.Hereinafter, the present invention will be described with reference to the accompanying drawings, the oil level height sensor.

도 2에는 본 발명에 따른 유면 높이 감지 장치의 일 실시예가 도시된 바, 연료 등과 같은 유체(1)를 저장하는 탱크(3)와, 차압센서부(5) 및 플로트수단(7)을 내부에 구비하여 상기 탱크(3)에 고정 지지하는 센서케이스(9)로 이루어져 있다.2 shows an embodiment of the oil level sensor according to the present invention, the tank (3) for storing the fluid (1), such as fuel, the differential pressure sensor unit 5 and the float means 7 therein It consists of a sensor case (9) which is fixed to and supported on the tank (3).

여기서, 상기 차압센서부(5)는 탱크 내의 상측 기체(11)가 연통되는 제1체임버(13)와, 상기 플로트수단(7)에 연결되어 작동되는 다이어프렘(15)으로 밀폐된 제2체임버(17) 및 상기 제1체임버(13)와 제2체임버(17)가 양측면에 형성되도록 설치된 압전소자(19)로 구성되어 있으며,Here, the differential pressure sensor part 5 is a second chamber sealed by the first chamber 13 to communicate the upper gas 11 in the tank and the diaphragm 15 connected to the float means 7 and operated. (17) and the first chamber 13 and the second chamber 17 is composed of a piezoelectric element 19 provided to be formed on both sides,

상기 플로트수단(7)은 상기 제2체임버(17)를 형성하는 다이어프렘(15)을 작동시키는 작동로드(21)와, 상기 작동로드(21)의 하단에 고정된 고정플로트(23)로 구성되어 있다.The float means 7 is composed of an operating rod 21 for operating the diaphragm 15 forming the second chamber 17 and a fixed float 23 fixed to the lower end of the operating rod 21. It is.

따라서, 상기 고정플로트(23)에 작용하는 유체 깊이의 변화에 따른 부력은 그 변화가 상기 작동로드(21)를 통해 상기 다이어프렘(15)에 전해지도록 되어 있다.Accordingly, the buoyancy according to the change of the fluid depth acting on the fixed float 23 is such that the change is transmitted to the diaphragm 15 through the working rod 21.

상기 센서케이스(9)는 상기 차압센서부(5) 및 플로트수단(7)을 탱크(3)에 고정 지지하며 탱크(3)내의 유체와 기체가 용이하게 상기 차압센서부(5) 및 플로트수단(7)에 작용하도록 하는데, 이는 상기 센서케이스(9)의 하단에 마련된 유체출입구(25)와 상측에 마련된 기체출입구(27)에 의해서 가능하다.The sensor case 9 supports and supports the differential pressure sensor part 5 and the float means 7 to the tank 3, and the differential pressure sensor part 5 and the float means can be easily flowed with the fluid in the tank 3. (7), which is possible by the fluid inlet 25 provided in the lower end of the sensor case (9) and the gas inlet (27) provided on the upper side.

한편, 상기 압전소자(19)에서 발생되는 센싱신호는 적절한 공지된 전자회로 기술에 의해 연료게이지 등과 같은 유면의 높이를 정량적으로 표현하는 표시장치에 디스플레이 될 수 있다.On the other hand, the sensing signal generated by the piezoelectric element 19 can be displayed on the display device quantitatively expressing the height of the oil surface, such as fuel gauge by a suitable known electronic circuit technology.

상기한 바와 같이 구성된 본 발명의 작용을 설명하면 다음과 같다.Referring to the operation of the present invention configured as described above are as follows.

상기 탱크(3)에 저장된 유체(1)의 양에 따라서, 상기 고정플로트(23)가 받는 부력은 달라지는 바, 상기와 같은 부력의 변화는 상기 작동로드(21)를 통해 상기 다이어프렘(15)을 작동시키고, 이는 상기 압전소자(19)에 작용하는 제2체임버(17)의 압력을 변화시킴으로써, 상기 압전소자(19)에서는 그에 상응하는 센싱신호가 발생되게 되는 것이다.Depending on the amount of fluid 1 stored in the tank 3, the buoyancy received by the fixed float 23 is different, such a change in buoyancy through the operating rod 21 the diaphragm 15 This is to change the pressure of the second chamber 17 acting on the piezoelectric element 19, so that the corresponding sensing signal is generated in the piezoelectric element 19.

즉, 유체(1)속에 고정플로트(23)가 잠긴 깊이를 H1이라 하고 고정플로트(23)의 단면적을 Af라 할 때 Af*H1의 부력 Ff1이 발생하여 이 힘이 상기 작동로드(21)를 통해 다이어프렘(15)을 작동시켜 제2체임버(17)의 압력을 형성하고, 유면이 변화되어 고정플로트(23)가 잠긴 깊이가 H2로 변화되면 상기와 같은 부력 Ff2는 Af*H2 가되어 마찬가지로 상기 다이어프렘(15)을 작동시켜 제2체임버(17)의 압력을 변화시키는데, 이때, 상기 제1체임버(13)에는 탱크(3)내의 기체(11)의 압력이 상기 센싱케이스(9)의 상측에 마련된 기체출입구(27)에 의해 일정하게 제공되므로, 압전소자(19)의 일측은 일정한 상태의 압력이 타측은 변화되는 압력이 제공되어 기준이 되는 제1체임버(13)의 압력상태에 따른 제2체임버(17)의 압력변화는 즉각적으로 압전소자(19)의 전기적 신호로 발생되어 이를 통해 유체(1)의 양을 측정할 수 있게 되는 것이다.That is, when the depth in which the fixed float 23 is immersed in the fluid 1 is H1 and the cross-sectional area of the fixed float 23 is Af, the buoyancy force Ff1 of Af * H1 is generated, and this force is applied to the operating rod 21. When the diaphragm 15 is operated to form the pressure of the second chamber 17, and when the oil level is changed and the depth in which the fixed float 23 is locked is changed to H2, the buoyancy Ff2 as described above becomes Af * H2. The diaphragm 15 is operated to change the pressure of the second chamber 17. In this case, the pressure of the gas 11 in the tank 3 is applied to the first chamber 13 of the sensing case 9. Since it is constantly provided by the gas inlet 27 provided on the upper side, one side of the piezoelectric element 19 according to the pressure state of the first chamber 13, which is provided with a pressure in which a constant state is changed to the other side is provided as a reference The change in pressure of the second chamber 17 is immediately generated as an electrical signal of the piezoelectric element 19 and communicated therewith. It will be the amount of fluid (1) can be measured.

아울러, 상기한 바와 같이 고정플로트(23)가 유면에 잠긴 깊이의 변화는 상기 센싱케이스(9)의 내측과 연통되는 유체출입구(25)가 도시된 바와 같이 작은 단면적을 가지고 형성되어 있으므로 탱크(3)의 운동상태 변화에 따른 유면의 기울음이나 그 높이의 급격한 변화가 상기 센싱케이스(9) 내에는 즉각적으로 영향을 주지는 않게 되어 비교적 안정적인 유면 높이의 센싱이 이루어지는 것이다.In addition, as described above, the change in the depth of the fixed float 23 submerged in the oil level is because the fluid inlet 25 communicating with the inner side of the sensing case 9 is formed to have a small cross-sectional area as shown in the tank 3. The slope of the oil surface or the sudden change in the height according to the change of the movement state of the c) does not immediately affect the sensing case 9, so that the sensing of the relatively high oil level is achieved.

물론, 상기한 바와 같이 센싱되는 압전소자(19)로부터의 전기적 신호를 이용하면 종래의 공지된 전자회로 기술에 의해 그 탱크(3) 내에 잔류된 유체의 양을 정량적으로 보다 정확하게 표시할 수 있고, 연료의 잔량이 부족한 경우에는 그 상황을 경고하는 경고등을 점등하는 장치 등에 용이하게 사용될 수 있으며,Of course, using the electrical signal from the piezoelectric element 19 sensed as described above, it is possible to display the amount of fluid remaining in the tank 3 more quantitatively by conventionally known electronic circuit technology, If the remaining fuel is insufficient, it can be easily used for the device that lights a warning light to warn the situation,

본 발명이 비록 차량에 장착된 연료탱크내의 연료잔량 검출을 위주로 기술하고 있으나, 이는 상기한 바와 같이 내부에 유체를 저장하고 있는 탱크(3)의 운동상태가 변화하는 것에도 불구하고 항상 정확하게 내부의 유체잔량을 검출해내는 여러 다른 기술분야에도 사용될 수 있을 것이다.Although the present invention mainly describes the detection of the remaining fuel amount in the fuel tank mounted on the vehicle, it is always accurate even though the movement state of the tank 3 storing the fluid therein changes as described above. It can also be used in many other technical fields for detecting residual fluid.

이상 설명한 바와 같이 본 발명에 의하면, 연료탱크 등과 같은 밀폐된 탱크 내에 잔류하고 있는 유체의 양을 탱크의 운동상태가 변화하는 것에 영향 받지 않고 보다 정확하게 검출해 낼 수 있도록 한다.As described above, according to the present invention, the amount of fluid remaining in a closed tank such as a fuel tank can be detected more accurately without being affected by the change in the state of movement of the tank.

Claims (3)

압전소자의 양측에 형성된 제1,2체임버로 이루어진 차압센서부와, 탱크 내의 유체에 잠긴 깊이에 따라 부력을 발생시켜 상기 제2체임버의 내부압을 변화시키는 플로트수단과, 상기 차압센서부 및 플로트수단을 탱크에 고정 지지하며 탱크내의 유체와 기체가 용이하게 상기 차압센서부 및 플로트수단에 작용하도록 하는 센서케이스로 구성된 것을 특징으로 하는 유면 높이 감지 장치.A differential pressure sensor part comprising first and second chambers formed on both sides of the piezoelectric element, a float means for generating buoyancy according to the depth submerged in the fluid in the tank to change the internal pressure of the second chamber, and the differential pressure sensor part and float An oil level sensor, comprising: a sensor case fixed to the tank and configured to allow the fluid and gas in the tank to easily act on the differential pressure sensor unit and the float means. 제1항에 있어서,The method of claim 1, 상기 차압센서부는 탱크 내의 상측 기체부가 연통되는 제1체임버와, 상기 플로트수단에 연결되어 작동되는 다이어프렘으로 밀폐된 제2체임버 및 상기 제1체임버와 제2체임버가 양측면에 형성되도록 설치된 압전소자로 구성된 것을 특징으로 하는 유면 높이 감지 장치.The differential pressure sensor unit includes a first chamber in which an upper gas part communicates with the tank, a second chamber sealed by a diaphragm connected to the float means, and a piezoelectric element installed on both sides of the first chamber and the second chamber. Level height sensing device, characterized in that configured. 제1항에 있어서,The method of claim 1, 상기 플로트수단은 상기 제2체임버를 형성하는 다이어프렘을 작동시키는 작동로드와, 상기 작동로드의 하단에 고정된 고정플로트로 구성된 것을 특징으로 하는 유면 높이 감지 장치.And said float means comprises an actuating rod for actuating the diaphragm forming said second chamber, and a fixed float fixed to the lower end of said actuating rod.
KR1020000081332A 2000-12-23 2000-12-23 A sensing device of oil level KR20020051784A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020000081332A KR20020051784A (en) 2000-12-23 2000-12-23 A sensing device of oil level

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020000081332A KR20020051784A (en) 2000-12-23 2000-12-23 A sensing device of oil level

Publications (1)

Publication Number Publication Date
KR20020051784A true KR20020051784A (en) 2002-06-29

Family

ID=27685453

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020000081332A KR20020051784A (en) 2000-12-23 2000-12-23 A sensing device of oil level

Country Status (1)

Country Link
KR (1) KR20020051784A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114876695A (en) * 2022-04-02 2022-08-09 华能澜沧江水电股份有限公司 Method for remotely judging performance reduction of oil pump motor of speed regulator oil pressure device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54155864A (en) * 1978-05-29 1979-12-08 Toshiba Corp Liquid level gauge
JPS5760218A (en) * 1980-09-30 1982-04-12 Yamatake Honeywell Co Ltd Displacement-type elvel indicator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54155864A (en) * 1978-05-29 1979-12-08 Toshiba Corp Liquid level gauge
JPS5760218A (en) * 1980-09-30 1982-04-12 Yamatake Honeywell Co Ltd Displacement-type elvel indicator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114876695A (en) * 2022-04-02 2022-08-09 华能澜沧江水电股份有限公司 Method for remotely judging performance reduction of oil pump motor of speed regulator oil pressure device

Similar Documents

Publication Publication Date Title
JP3155011B2 (en) Measuring device for liquid volume and liquid level in multiple containers
US4091671A (en) Electronic fluid level sensor
JP6034370B2 (en) Medium separation device, particularly hydraulic accumulator, including associated measuring instrument and measuring method
US6931926B1 (en) Liquid depth sensing system with liquid identification capability
KR101411626B1 (en) a integrated measuring apparatus for measuring gas pressure and liquid level for a liquid tank
ITTO20000520A1 (en) OPTICAL DEVICE FOR DETECTION OF THE LEVEL OF A FLUID IN A CONTAINER.
KR20020051784A (en) A sensing device of oil level
US6318332B1 (en) Method for monitoring adequate oil lubrication of an internal combustion engine and an internal combustion engine for carrying out the method
CA2614445A1 (en) Liquid level sensing system with liquid identification capability
US3990307A (en) Liquid level measuring and indicating apparatus
JP4342908B2 (en) Tank leak detector
KR101413247B1 (en) A fuel level detecting device comprising a differential pressure sensor
KR20010030255A (en) Method and apparatus for detecting the level of fluid in a tank
KR960012076B1 (en) Test apparatus for engine oil
KR101188850B1 (en) Piston cooling oil flowing and temperature measuring device for a vessel engine
US4528846A (en) Measuring devices for watercraft
KR100461204B1 (en) Automobile engine oil buoyancy car level switch type level alarm device
CN217926022U (en) Dipstick structure and engine
KR200277222Y1 (en) Automotive engine oil buoyancy level switch level alarm
KR100200146B1 (en) Available traveling display apparatus of vehicle
KR19980025506U (en) Oil level meter using pressure sensor and temperature sensor
KR100412807B1 (en) Oil-level indicator of engine for automobile
CN1107222C (en) Ink capacity measuring method and device
KR100412798B1 (en) A fuel measuring device having a compensatory measure of varying fuel in tank
RU2229691C2 (en) Device measuring level of liquid

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application