KR930004753Y1 - Level detecting apparatus - Google Patents
Level detecting apparatus Download PDFInfo
- Publication number
- KR930004753Y1 KR930004753Y1 KR2019910014670U KR910014670U KR930004753Y1 KR 930004753 Y1 KR930004753 Y1 KR 930004753Y1 KR 2019910014670 U KR2019910014670 U KR 2019910014670U KR 910014670 U KR910014670 U KR 910014670U KR 930004753 Y1 KR930004753 Y1 KR 930004753Y1
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- Prior art keywords
- liquid level
- resistance value
- liquid
- pct
- current
- Prior art date
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- 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
- G01F23/22—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/24—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 measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Level Indicators Using A Float (AREA)
Abstract
내용 없음.No content.
Description
제1도는 종래의 액위검지장치.1 is a conventional liquid level detecting device.
제2도는 본 고안 액위검지장치.2 is a liquid level detecting device of the present invention.
제3도는 본 고안 액위검지장치의 PCT서미스터 저항값을 나타낸 그래프.3 is a graph showing the PCT thermistor resistance value of the liquid level detecting device of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
3 : 탱크 2 : 부구3: tank 2: float
3 : 단자 4 : 가변저항코일3: terminal 4: variable resistance coil
5 : 검지부 6 : 계기판5 detection unit 6: instrument panel
7 : 전류변환기 8 : PCT 서미스터7: Current converter 8: PCT thermistor
9 : 액위9: liquid level
본 고안은 비전도성액체의 액위검지장치에 관한 것으로, 특히 자동차용 연료탱크의 연료액위상태를 정온도계수정항체인 PCT 서미스터를 이용하여 검지할 수 있도록 한 비도전성 액체의 액위검지장치에 관한 것이다.The present invention relates to a liquid level detecting device for a non-conductive liquid, and more particularly, to a liquid level detecting device for a non-conductive liquid which enables the fuel liquid level of an automotive fuel tank to be detected using a PCT thermistor which is a constant temperature coefficient correcting antibody.
종래 비도전성액체의 액위검지장치는 대부분이 부구를 이용하여 부구의 승강운동에 따라 액위유무상태를 그대로 표시할 수 있도록 한 기계적인 구성이 있는가 하면, 최근들어 제1도에 도시한 바와같이, 비도전성 액체가 들어있는 탱크(1)내에 액위(9)에 따라 승강하는 부구(2)를 가진단자(3)가 가변저항코일(4)을 구비한 감지부(5)와 접촉을 이루도록 구성하고, 상기 검지부(5)는 계기판(6)을 구비한 전류변환기(7)와 접속구성시켜, 상기 탱크(1)내의 액위(9) 상태 고저에 따라 부구(2)가 승강하게 되고, 이 부구(2)의 승강에 의해 단자(3)가 상기 검지부(5)의 가변저항코일(4)과 접촉을 하면서 승강하게 됨에 따라 저항값이 변화하므로, 상기 가변저항코일(4)에 흐르는 전류가 변화하게 되고, 이 전류의 변화는 전류변환기(7)를 통해 전류변화에 따른 값을 계기판(6)에 표시하게 되는바, 이와같은 액위(9) 상태를 검지하는 장치는 부구(2)의 승강시에 단자(3)가 가변저항코일(4)과의 마찰접촉이 이루어져야만 액위상태를 검지할 수 있도록 되어 있는 관계로, 상기 잦은 마찰접촉으로 인하여 접촉불량을 야기시키는가 하면, 상기 부구(2)의 승강을 용이하게 하기 위하여 별도의 장치 등이 부가되는 문제점을 가지게 되었다.Conventionally, the liquid level detection device of the non-conductive liquid has a mechanical structure that can be used to display the state of the liquid level as it is in accordance with the lifting movement of the float using most of the float, as shown in FIG. A terminal 3 having a float 2 rising and falling in accordance with the liquid level 9 in the tank 1 containing the malleable liquid is configured to make contact with the sensing unit 5 with the variable resistance coil 4, The detection unit 5 is connected to the current converter 7 having the instrument panel 6 so that the float 2 is raised and lowered according to the level of the liquid level 9 in the tank 1. Since the resistance value changes as the terminal 3 moves up and down while contacting the variable resistance coil 4 of the detection unit 5 by the lifting and lowering of), the current flowing through the variable resistance coil 4 changes. This change of current is transmitted to the instrument panel 6 through the current converter 7. The device for detecting the state of the liquid level 9 is to be displayed so that the level of the liquid level 9 can be detected only when the terminal 3 is in frictional contact with the variable resistance coil 4 during the lifting and lowering of the float 2. As a result, the frequent frictional contact causes poor contact, and has a problem in that a separate device or the like is added to facilitate the lifting of the float 2.
본 고안의 목적은 상기 문제점을 해결하기 위한 것으로, 연료액위 상태를 보다 간단용이하게 검지할 수 있도록 하는 액위검지장치를 제공하는데 있다.An object of the present invention is to solve the above problems, and to provide a liquid level detection device that can more easily and easily detect the fuel level.
상기의 목적을 실현하기 위하여 본 고안은 연료탱크내에 주입된 액위에 정온도계수 저항체인 PCT 서미스터를 다수개 직렬접속하여 담그고, 이에 계기판이 부착된 전류변환기를 부착하여 상기 액위 상태에 따라 PCT 서미스터 저항변화에 대하여 전류량을 검출하고 이를 변환기를 통해 표시토록한 것을 특징으로 한다.In order to realize the above object, the present invention immerses a plurality of PCT thermistors, which are constant temperature coefficient resistors, in series in a liquid level injected into a fuel tank, and attaches a current transformer with an instrument panel to the PCT thermistor resistance according to the liquid level. It is characterized by detecting the amount of current against the change and displaying it through the converter.
이하 첨부된 도면에 의거 본 고안을 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
제2도에 도시한 바와같이, 비도전성액체가 들어있는 탱크(1)내에 액위(9)를 검지하기 위한 검지부(5)와, 이 검지부(5)로 검지된 저항값을 검지하고, 이 저항값에 따라 변화하는 전류에 대하여 전류변환기(7)로 액위상태를 표시토록된 액위검지장치에 있어서, 상기 액위(9)를 검지하기 위한 검지부(5)를 온도에 따라 저항값이 변화하는 정온도계수 저항체인 PCT 서미스터(8)를 다수개 직렬로 접속하여, 액위상태에 따른 저항값을 검지할 수 있도록 구성한 것이다.As shown in FIG. 2, the detection unit 5 for detecting the liquid level 9 in the tank 1 containing the non-conductive liquid and the resistance value detected by the detection unit 5 are detected. In the liquid level detection device which displays the liquid level state by the current converter 7 with respect to the electric current which changes according to a value, the positive thermometer which the resistance value changes with temperature by the detection part 5 for detecting the said liquid level 9 with temperature. A plurality of PCT thermistors 8, which are male resistors, are connected in series and configured to detect a resistance value according to the liquid level.
상기와같이 구성하여서 된 본 고안의 작용효과를 설명하면 다음과 같다.Referring to the operation and effect of the subject innovation made up as described above are as follows.
먼저 검지부(5)인 다수개의 PCT 서미스터(8)를 직렬로 접속하고 정격전류를 인가하게 되면 각 PCT 서미스터(8)는 자체발열에 의해 고저항값을 유지하게 되며, 이때 각 PCT 서미스터(8)의 저항값은 500∼1000Ω을 갖게 되며, 상기 PCT 서미스터는 온도에 따라 저항값이 변화하게 되는 특성을 가지고 온도가 상승함에 따라 저항값도 증가하게 된다.First, when a plurality of PCT thermistors 8, which are the detection unit 5, are connected in series and a rated current is applied, each PCT thermistor 8 maintains a high resistance value by self-heating. In this case, each PCT thermistor 8 Has a resistance value of 500 ~ 1000 500, the PCT thermistor has a characteristic that the resistance value changes with temperature and the resistance value also increases with increasing temperature.
따라서 PCT 서미스터의 일반적인 저항값은 상온(25℃)에서 약 1∼2Ω을 갖게 되고, 고온(150℃ 이상)에서 약 1∼2㏀정도의 저항값을 갖게 된다.Therefore, the general resistance value of the PCT thermistor is about 1 to 2 kV at room temperature (25 ° C) and about 1 to 2 kV at high temperature (150 ° C or more).
발열특성을 살펴보면, 전류를 인가하면 스스로 발열하는 발열체이다(별열온도 250∼300℃ 정도).Looking at the heat generation characteristics, it is a heating element that generates heat by itself when a current is applied (star temperature 250 ~ 300 ℃).
따라서 상기 검지부(5)인 PCT 서미스터(8)를 비도전성액체가 담겨져 있는 탱크(1)에 담그게 되면 발열을 하면서 고저항값을 갖는 PCT 서미스터(8)가 액체에 의하여 자체냉각되게 되고, 이로인하여 액체중 담겨지게 되는 PCT 서미스터(8)의 저항값은 저항(1Ω이하)에 머물게 되어 액체의 액위상태에 따른 전체저항값이 변화하게 되는바, 즉, 이를 구체적으로 설명하면, 예를들어 제3도에 도시한 바와같이 PCT 서미스터(8)를 5개 연결하여 탱크(1)내의 액체속에 모두 담구었을 경우 상기 PCT 서미스터의 상온 저항값은 각 PCT 서미스터당 1Ω정도로 가정하였을 경우 전제저항값은 5Ω정도로 나타나게 된다.Therefore, when the PCT thermistor 8, which is the detection unit 5, is immersed in the tank 1 in which the non-conductive liquid is contained, the PCT thermistor 8 having a high resistance while generating heat is self-cooled by the liquid. Due to the resistance value of the PCT thermistor (8) to be contained in the liquid stays in the resistance (1 kΩ or less), the total resistance value changes according to the liquid level state of the liquid, that is, specifically described, for example, As shown in FIG. 3, when five PCT thermistors (8) are connected and immersed in the liquid in the tank (1), the room temperature resistance value of the PCT thermistor is assumed to be about 1Ω per PCT thermistor. Will appear as much.
따라서 상기 연료탱크(1)의 액위(9) 상태가 변화함에 따라 PCT 서미스터(8)가 액위로부터 노출되는 상태가 다르게되므로, 예를들어 탱크(1)의 액위(9)로부터 PCT 서미스터(8)가 3개만 담겨있을 경우 2개는 노출되는 상태이므로, 노출된 2개의 PCT 서미스터(8)에 의하여 2000℃ 정도로 담겨져있는 저항값은 3Ω이므로, 2003Ω의 저항값을 나타내게 되고 이 저항값에 의한 PCT 서미스터(10)에 흐르는 전류값에 적용되면서 변화되어 전류값을 갖게되고 이 전류값은 전류변환기(7)에 의하여 변환되어 계기판(6)에 기계적 눈금 또는 계기판(7)이 디지탈인 경우 디지탈로 표시하게 되는 것이다.Therefore, as the state of the liquid level 9 of the fuel tank 1 changes, the state in which the PCT thermistor 8 is exposed from the liquid level is different, for example, from the liquid level 9 of the tank 1 to the PCT thermistor 8. If only three are contained, two are exposed, so the resistance value contained at about 2000 ° C by the two exposed PCT thermistors 8 is 3 kΩ, resulting in a resistance value of 2003 kV and the PCT thermistors by this resistance value. Current value flowing in (10) The current value is changed to have a current value, which is converted by the current converter 7 so that the mechanical scale or the instrument panel 7 in the instrument panel 6 is digitally displayed.
이상에서 설명한 바와같이 본 고안은 연료탱크내에 액위검지를 정온도 계수저항체인 PCT 서미스터를 이용하여 감지하도록 함으로써 종래의 부구를 이용한 액위검지장치와 비교하여 볼 때, 검지부의 마찰접촉에 의한 접촉불량이 발생되지 않으며, 이를 장착하는 별도의 장치가 필요하지 않게되어 장착공간이 필요하지 않아, 액위를 검지할 수 있는 어떠한 형태의 용기라도 용이하게 검지할 수 있는 편리한 이점을 제공하게 되는 것이다.As described above, the present invention allows the liquid level detection in the fuel tank to be detected using a PCT thermistor which is a constant temperature coefficient resistor. It does not occur, and does not require a separate device for mounting it does not require a mounting space, it is to provide a convenient advantage that can easily detect any type of container that can detect the liquid level.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019910014670U KR930004753Y1 (en) | 1991-09-09 | 1991-09-09 | Level detecting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019910014670U KR930004753Y1 (en) | 1991-09-09 | 1991-09-09 | Level detecting apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR930007169U KR930007169U (en) | 1993-04-24 |
| KR930004753Y1 true KR930004753Y1 (en) | 1993-07-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019910014670U KR930004753Y1 (en) | 1991-09-09 | 1991-09-09 | Level detecting apparatus |
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| Country | Link |
|---|---|
| KR (1) | KR930004753Y1 (en) |
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1991
- 1991-09-09 KR KR2019910014670U patent/KR930004753Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR930007169U (en) | 1993-04-24 |
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