CN102353425A - Fuel oil surface position sensing device - Google Patents
Fuel oil surface position sensing device Download PDFInfo
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- CN102353425A CN102353425A CN 201110152752 CN201110152752A CN102353425A CN 102353425 A CN102353425 A CN 102353425A CN 201110152752 CN201110152752 CN 201110152752 CN 201110152752 A CN201110152752 A CN 201110152752A CN 102353425 A CN102353425 A CN 102353425A
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- magnetic switch
- resistance
- magnetic
- fuel oil
- fuel tank
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Abstract
The invention discloses a fuel oil surface position sensing device, which comprises a limit base, an installation shell, a magnetic floater and an installation disk, wherein a plurality of magnetic switches which are connected in series in sequence and resistors which are connected in parallel to the two ends of each magnetic switch are arranged in the installation shell; and the magnetic floater floats on the oil surface in an oil tank. When the magnetic floater descends or ascends along with the oil surface, the magnetic switch at a position corresponding to the magnetic floater is switched on, the resistor which is connected with the magnetic switch is short-circuited, and the total resistance of resistors which are connected in series in a circuit decreases or increases linearly according to a certain proportion, so that a voltage signal input to an amplification unit decreases or increases according to a certain proportion, the output of the amplification unit decreases or increases according to a certain proportion; voltage output by the amplification unit reflects the position information of the oil surface in the oil tank, and the position of the oil surface in the oil tank is reflected by a voltage signal on a resistor; and the shape of the oil tank is not required, so that the sensing device is suitable for oil tanks of different structures, in particular for oil tanks of irregular structures.
Description
Technical field
The application relates to sensor technical field, particularly relates to a kind of fuel oil pasta position induction device.
Background technology
Fuel oil pasta position induction device is applied on the engine; The position of pasta and the pasta positional information is converted into electric signal offers display device in the fuel tank that can induction generator is so that the staff need not to open the position that fuel tank just can be known the pasta that fuel tank is interior very easily.
Prior fuel oil pasta position induction device uses the fuel oil position transducer of swept resistance formula to realize usually, and this fuel oil pasta position induction device only is fit to the fuel tank of tactical rule, is not suitable for, fuel tank in irregular shape.
Summary of the invention
For solving the problems of the technologies described above; The application embodiment provides a kind of fuel oil pasta position induction device; In the fuel tank that is not only applicable to tactical rule, especially go for the interior fuel oil pasta position induction device of fuel tank of irregular structure, technical scheme is following:
A kind of fuel oil pasta position induction device comprises:
Be fixed on the limit base on the fuel tank inner bottom surface;
Be fixed on the installation shell of the hollow on the said limit base;
Be set in said installation shell outer, with the suitable magnetic float of said magnetic switch;
Said installation cover top portion be provided with the suitable mounting disc of the installing port at fuel tank top, be used for this fuel oil pasta position induction device is fixed on said fuel tank;
The length direction of said installation enclosure is provided with a plurality of magnetic switchs of series connection successively; And each magnetic switch two ends all is parallel with resistance; A plurality of said magnetic switchs formation series arm of connecting successively; Wherein this series arm is connected to the common port of first divider resistance and second divider resistance near an end of said installation outer casing bottom; The other end of said first divider resistance is connected to direct supply, the other end ground connection of said second divider resistance, and said series arm is connected with amplifying unit near an end of said installation cover top portion.
Preferably, said amplifying unit is an operational amplifier, wherein:
The in-phase input end of this operational amplifier links to each other with the end of said series arm near said installation cover top portion; The reverse inter-input-ing ending grounding of this operational amplifier; The positive power source terminal of this operational amplifier is connected to+direct supply of 12V; Negative power end ground connection, output terminal output and the interior pasta position of fuel tank corresponding voltage signal.
Preferably; The series arm that said magnetic switch constitutes is connected to the public connecting end of said first divider resistance and said second divider resistance through diode; And the anode of said diode links to each other with the public connecting end of said first divider resistance and said second divider resistance, and the negative electrode of said diode links to each other with said series arm.
Preferably, the number of said magnetic switch is 8, and the number that is connected in parallel on the resistance at said magnetic switch two ends is 8.
Preferably, said fuel oil pasta position induction device also comprises, with the display unit that said amplifying unit links to each other, is used to show the positional information of fuel oil pasta in the fuel tank.
Technical scheme by above the application embodiment provides is visible; Through being arranged on the magnetic switch of a plurality of series connection between fuel tank top to the fuel tank bottom, and be parallel with resistance at each magnetic switch two ends, and the series connection of a plurality of resistance; Magnetic float floats on the interior pasta of fuel tank; When magnetic float descends or rises with pasta, closed with the magnetic switch of the corresponding position of magnetic float, thus short circuit and this magnetic switch parallel resistor; Cause being serially connected in the total resistance of resistance in the circuit in proportion linearity reduce or increase; Make the voltage signal input to amplifying unit reduce in proportion or increase that the output of amplifying unit is descended in proportion or increase, the voltage of being exported by amplifying unit has reflected the positional information of pasta in the fuel tank.The fuel oil pasta position induction device that the application embodiment provides is through the position of pasta in the ohmically voltage signal reflection fuel tank; Shape to fuel tank does not require; Therefore, be not only applicable to especially go for the fuel tank of irregular structure in the fuel tank of tactical rule.
Description of drawings
In order to be illustrated more clearly in the application embodiment or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiment that put down in writing among the application, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the contour structures synoptic diagram of a kind of fuel oil pasta of the application embodiment position induction device;
Fig. 2 is the circuit theory diagrams of a kind of fuel oil pasta of the application embodiment position induction device;
Fig. 3 is the circuit theory diagrams of the another kind of fuel oil pasta of the application embodiment position induction device;
Fig. 4 is the circuit theory diagrams of a kind of concrete fuel oil pasta position induction device of the application embodiment;
Fig. 5 is the voltage signal and the pasta position corresponding relationship synoptic diagram of said fuel oil pasta position induction device output.
Embodiment
In order to make those skilled in the art person understand the technical scheme among the application better; To combine the accompanying drawing among the application embodiment below; Technical scheme among the application embodiment is carried out clear, intactly description; Obviously, described embodiment only is the application's part embodiment, rather than whole embodiment.Based on the embodiment among the application, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all should belong to the scope of the application's protection.
See also Fig. 1 and Fig. 2, Fig. 1 shows the contour structures synoptic diagram of a kind of fuel oil pasta of the application embodiment place value induction installation; Fig. 2 shows the circuit theory diagrams of fuel oil pasta position induction device.
Fuel oil pasta position induction device mainly comprises: limit base 1, installation shell 2, magnetic float 3, mounting disc 4, and lead-out terminal 5, wherein:
Sensor circuit mainly comprises: magnetic switch 6, resistance 7, and amplifying unit 8, wherein:
A plurality of magnetic switchs 6 are arranged on said installation shell 2 inside with a plurality of resistance 7; A plurality of magnetic switchs 6 are connected successively and are arranged on the length direction that shell is installed; A plurality of magnetic switchs constitute series arms, and this series arm is connected to the public connecting end of the first divider resistance R9 and the second divider resistance R10 near an end of said limit base 1, wherein; The other end of the first divider resistance R9 is connected to said direct supply Vcc, the other end ground connection of the second divider resistance R10.Each magnetic switch 6 two ends all is parallel with a resistance 7, and a plurality of resistance 7 is connected successively.
The number of said magnetic switch 6 can be according to the distance decision at fuel tank bottom surface to top, and the number of said resistance 7 is consistent with the number of magnetic switch 6.
The other end of said series arm connects the input end of amplifying unit 8, and the output terminal of said amplifying unit 8 is electrically connected with said lead-out terminal 5, the positive supply termination direct supply Vcc of amplifying unit 8, negative power end ground connection.
The resistance 7 of direct supply Vcc, the first divider resistance R9, a plurality of series connection and amplifying unit 8 negative power ends form the closed-loop path; And; The second divider resistance R10 and magnetic switch 6 and resistance 7, and the branch road that amplifying unit constitutes is parallelly connected with the second divider resistance R10.
The fuel oil pasta position induction device that present embodiment provides; Through being arranged on the magnetic switch of a plurality of series connection between fuel tank top to the fuel tank bottom, and be parallel with resistance at each magnetic switch two ends, and the series connection of a plurality of resistance; Magnetic float floats on the interior pasta of fuel tank; When magnetic float descends or rises with pasta, closed with the magnetic switch of the corresponding position of magnetic float, thus short circuit and this magnetic switch parallel resistor; Cause being serially connected in the total resistance of resistance in the circuit in proportion linearity reduce or increase; Make the voltage signal input to amplifying unit reduce in proportion or increase that the output of amplifying unit is descended in proportion or increase, the voltage of being exported by amplifying unit has reflected the positional information of pasta in the fuel tank.The fuel oil pasta position induction device that the application embodiment provides is through the position of pasta in the ohmically voltage signal reflection fuel tank; Shape to fuel tank does not require; Therefore, be not only applicable to especially go for the fuel tank of irregular structure in the fuel tank of tactical rule.
Preferably; Can realize that referring to the said amplifying unit in Fig. 3 the foregoing description wherein, the in-phase input end of said power amplifier IC1 links to each other near the end that cover top portion is installed with said magnetic switch through power amplifier IC1; Reverse inter-input-ing ending grounding; The forward power end connects direct supply Vcc, negative sense power end ground connection, output terminal out obtain with fuel tank in the positional information corresponding voltage signal of pasta.In addition, the voltage signal that power amplifier can also be imported carries out shaping, and promptly power amplifier has amplification and shaping operation.
At this moment, the internal resistance R of power amplifier
In, the first divider resistance R9, magnetic switch 6 and be connected in parallel on a plurality of resistance 7 formation closed-loop paths at magnetic switch two ends; When magnetic float 3 descends or rises with pasta; Magnetic switch 6 closures with magnetic float 3 corresponding positions; Thereby short circuit and this magnetic switch parallel resistor 7, cause being serially connected in the total resistance of resistance in the circuit in proportion linearity reduce or increase, make the voltage signal that inputs to power amplifier IC1 reduce in proportion or increase; The output of power amplifier IC1 descended in proportion or increase, finally the output terminal of power amplifier IC1 obtain with fuel tank in the corresponding information of voltage of pasta positional information.
Preferably; Referring to Fig. 3, among above-mentioned all embodiment, the series arm that said magnetic switch 6 constitutes is connected to the public connecting end of the first divider resistance R9 and the second divider resistance R10 through diode D near the end that outer casing bottom is installed; And the anode of diode D links to each other with said public connecting end; The series arm that the negative electrode of said diode D and magnetic switch 6 constitutes links to each other, and formation power supply unidirectional circuit is avoided the power supply reversal connection and damaged discharge circuit.
Preferably, the fuel oil pasta position induction device that above-mentioned all embodiment provide also comprises: with the display unit that the output terminal of amplifying unit links to each other, be used to show the positional information of fuel oil pasta in the fuel tank.
See also Fig. 4, show a kind of concrete sensor circuit schematic diagram of fuel oil pasta position induction device, and combine Fig. 1, sensor circuit comprises:
Be arranged on the magnetic switch of installing in the shell; Be specially: the first magnetic switch C1, the second magnetic switch C2, the 3rd magnetic switch C3, the 4th magnetic switch C4, the 5th magnetic switch C5, the 6th magnetic switch C6, the 7th magnetic switch C7 and the 8th magnetic switch C8 that connect successively; These 8 magnetic switch series connection constitute a series connection branch road, and 8 magnetic switchs are evenly distributed on the length direction at bottom to the top that shell is installed.
And; Each magnetic switch two ends is resistance of parallel connection all; Promptly be connected in parallel on the first magnetic switch C1 two ends first resistance R 1, be connected in parallel on the second magnetic switch C2 two ends second resistance R 2, be connected in parallel on the 3rd magnetic switch C3 two ends R3, be connected in parallel on the 4th magnetic switch C4 two ends the 4th resistance R 4, be connected in parallel on the 5th magnetic switch C5 two ends the 5th resistance R 5, be connected in parallel on the 6th resistance R 6 at the 6th magnetic switch C6 two ends; Be connected in parallel on the 7th resistance R 7 at the six or seven magnetic switch C7 two ends; Be connected in parallel on the 8th resistance R 8 at the 8th magnetic switch C8 two ends, and these 8 resistance are connected successively.
The series arm that said magnetic switch constitutes is connected to the public connecting end of the first divider resistance R9 and the second divider resistance R10 near the end that outer casing bottom is installed through diode D, and the first divider resistance R9 connects direct supply, the second divider resistance R10 ground connection.
Wherein, The anode of diode D connects the common port of the first divider resistance R9 and the second divider resistance R10; The negative electrode of diode D connects the series arm of magnetic switch formation near the end that outer casing bottom is installed, and the other end of this series arm is connected to the in-phase input end of power amplifier IC1.
The reverse inter-input-ing ending grounding of power amplifier, the direct supply Vcc of positive power source terminal connection+12V, negative power end ground connection, output terminal output and the interior pasta positional information corresponding voltage signal of fuel tank.
Illustrate the principle of induction of this fuel oil pasta position induction device below:
When the pasta in the fuel tank is in the extreme higher position; Magnetic float is positioned at the position of the first magnetic switch C1; At this moment, the first magnetic switch C1 is closed, with 1 short circuit of first resistance R; Be direct supply Vcc through the first divider resistance R9, diode D, the 8th resistance R 8, the 7th resistance R 7, the 6th resistance R 6, the 5th resistance R 5, the 4th resistance R 4, the 3rd resistance R 3, second resistance R 2, the first magnetic switch C1, through the input resistance R of power amplifier
InGround connection forms a closed-loop path, and the pressure drop U1 on the resistance R 2-R8 is transported to the in-phase input end of power amplifier, amplifies the back through power amplifier and exports from output terminal.
Pasta in fuel tank descends; And when making magnetic float drop to the second magnetic switch C2 place; The second magnetic switch C2 is closed, and with 2 short circuits of second resistance R, first resistance R 1, the second magnetic switch C2 and resistance R 3-R8 are connected on and carry out dividing potential drop in the circuit; After pressure drop U2 on first resistance R 1 and the resistance R 3-R8 amplifies through power amplifier, the pasta positional information corresponding voltage signal in output terminal output and the said fuel tank.
Pasta in fuel tank descends; And when making magnetic float drop to the 3rd magnetic switch C3 place, the 3rd magnetic switch C3 is closed, with 3 short circuits of the 3rd resistance R; Resistance R 1-R2; The 3rd magnetic switch C3 and resistance R 4-R8 are connected on and carry out dividing potential drop in the circuit, and after the pressure drop U3 that obtains of dividing potential drop amplifies through power amplifier, output correspondent voltage signal.
Pasta in fuel tank descends; And when making magnetic float drop to the 4th magnetic switch C4 place, the 4th magnetic switch C4 is closed, with 4 short circuits of the 4th resistance R; Resistance R 1-R3; The 4th magnetic switch C4 and resistance R 5-R8 are connected on and carry out dividing potential drop in the circuit, and after the pressure drop U4 that obtains of dividing potential drop amplifies through power amplifier, output correspondent voltage signal.
Pasta in fuel tank descends; And when making magnetic float drop to the 5th magnetic switch C5 place, the 5th magnetic switch C5 is closed, with 5 short circuits of the 5th resistance R; Resistance R 1-R4; The 5th magnetic switch C5 and resistance R 6-R8 are connected on and carry out dividing potential drop in the circuit, and after the pressure drop U5 that obtains of dividing potential drop amplifies through power amplifier, output correspondent voltage signal.
Pasta in fuel tank descends; And when making magnetic float drop to the 6th magnetic switch C6 place, the 6th magnetic switch C6 is closed, with 6 short circuits of the 6th resistance R; Resistance R 1-R5; The 6th magnetic switch C6 and resistance R 7-R8 are connected on and carry out dividing potential drop in the circuit, and after the pressure drop U6 that obtains of dividing potential drop amplifies through power amplifier, output correspondent voltage signal.
Pasta in fuel tank descends; And when making magnetic float drop to the 7th magnetic switch C7 place, the 7th magnetic switch C7 is closed, with 7 short circuits of the 7th resistance R; Resistance R 1-R6; The 7th magnetic switch C7 and resistance R 8 are connected on carries out dividing potential drop in the circuit, and after the pressure drop U7 that obtains of dividing potential drop amplifies through power amplifier, output correspondent voltage signal.
Pasta in fuel tank descends; And when making magnetic float drop to the 8th magnetic switch C8 place, the 8th magnetic switch C8 is closed, with 8 short circuits of the seven or eight resistance R; Resistance R 1-R7; The 8th magnetic switch C8 is connected on and carries out dividing potential drop in the circuit, and after the pressure drop U8 that obtains of dividing potential drop amplifies through power amplifier, output correspondent voltage signal.
Through suitable choice resistance R 1-R8; Can obtain the pasta positions different in the fuel tank as shown in Figure 5 and the voltage signal graph of a relation of output; Can know that by figure the induced signal of the fuel tank pasta position induction device output that the application provides raises with the pasta position is stepped successively.
Certainly, also can make the induced signal of fuel tank pasta position induction device output reduce successively through changing the resistance of resistance R 1-R8 with the pasta position is stepped.
The above only is the application's a embodiment; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the application's principle; Can also make some improvement and retouching, these improvement and retouching also should be regarded as the application's protection domain.
Claims (5)
1. a fuel oil pasta position induction device is characterized in that, comprising:
Be fixed on the limit base on the fuel tank inner bottom surface;
Be fixed on the installation shell of the hollow on the said limit base;
Be set in said installation shell outer, with the suitable magnetic float of said magnetic switch;
Said installation cover top portion be provided with the suitable mounting disc of the installing port at fuel tank top, be used for this fuel oil pasta position induction device is fixed on said fuel tank;
The length direction of said installation enclosure is provided with a plurality of magnetic switchs of series connection successively; And each magnetic switch two ends all is parallel with resistance; A plurality of said magnetic switchs formation series arm of connecting successively; Wherein this series arm is connected to the common port of first divider resistance and second divider resistance near an end of said installation outer casing bottom; The other end of said first divider resistance is connected to direct supply, the other end ground connection of said second divider resistance, and said series arm is connected with amplifying unit near an end of said installation cover top portion.
2. fuel oil pasta position induction device according to claim 1 is characterized in that said amplifying unit is an operational amplifier, wherein:
The in-phase input end of this operational amplifier links to each other with the end of said series arm near said installation cover top portion; The reverse inter-input-ing ending grounding of this operational amplifier; The positive power source terminal of this operational amplifier is connected to+direct supply of 12V; Negative power end ground connection, output terminal output and the interior pasta position of fuel tank corresponding voltage signal.
3. fuel oil pasta position induction device according to claim 2; It is characterized in that; The series arm that said magnetic switch constitutes is connected to the public connecting end of said first divider resistance and said second divider resistance through diode; And the anode of said diode links to each other with the public connecting end of said first divider resistance and said second divider resistance, and the negative electrode of said diode links to each other with said series arm.
4. fuel oil pasta position induction device according to claim 3 is characterized in that the number of said magnetic switch is 8, and the number that is connected in parallel on the resistance at said magnetic switch two ends is 8.
5. according to each described fuel oil pasta position induction device of claim 1-4, it is characterized in that, also comprise,, be used to show the positional information of fuel oil pasta in the fuel tank with the display unit that said amplifying unit links to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110152752 CN102353425A (en) | 2011-06-08 | 2011-06-08 | Fuel oil surface position sensing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110152752 CN102353425A (en) | 2011-06-08 | 2011-06-08 | Fuel oil surface position sensing device |
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| CN102353425A true CN102353425A (en) | 2012-02-15 |
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| CN 201110152752 Pending CN102353425A (en) | 2011-06-08 | 2011-06-08 | Fuel oil surface position sensing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411652A (en) * | 2013-07-27 | 2013-11-27 | 国家电网公司 | Isolated transformer sleeve oil leveler indicator |
| WO2018028147A1 (en) * | 2016-08-11 | 2018-02-15 | 东莞正扬电子机械有限公司 | Liquid level detection method and liquid level sensor |
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| CN2921796Y (en) * | 2005-10-09 | 2007-07-11 | 张英丽 | Vertical column tyle oil level sensor |
| CN101603848A (en) * | 2009-07-10 | 2009-12-16 | 公安部沈阳消防研究所 | Liquid level and temperature sensor |
| CN202126299U (en) * | 2011-06-08 | 2012-01-25 | 隆鑫通用动力股份有限公司 | Fuel oil level position sensing device |
-
2011
- 2011-06-08 CN CN 201110152752 patent/CN102353425A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2921796Y (en) * | 2005-10-09 | 2007-07-11 | 张英丽 | Vertical column tyle oil level sensor |
| CN101603848A (en) * | 2009-07-10 | 2009-12-16 | 公安部沈阳消防研究所 | Liquid level and temperature sensor |
| CN202126299U (en) * | 2011-06-08 | 2012-01-25 | 隆鑫通用动力股份有限公司 | Fuel oil level position sensing device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411652A (en) * | 2013-07-27 | 2013-11-27 | 国家电网公司 | Isolated transformer sleeve oil leveler indicator |
| WO2018028147A1 (en) * | 2016-08-11 | 2018-02-15 | 东莞正扬电子机械有限公司 | Liquid level detection method and liquid level sensor |
| US10801875B2 (en) | 2016-08-11 | 2020-10-13 | Dongguan Zhengyang Electronic Mechanical Co., Ltd. | Liquid level detection method and liquid level sensor |
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Application publication date: 20120215 |