CN209372181U - A kind of oil level indicator - Google Patents
A kind of oil level indicator Download PDFInfo
- Publication number
- CN209372181U CN209372181U CN201822119951.7U CN201822119951U CN209372181U CN 209372181 U CN209372181 U CN 209372181U CN 201822119951 U CN201822119951 U CN 201822119951U CN 209372181 U CN209372181 U CN 209372181U
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- Prior art keywords
- resistance
- oil level
- sensor
- fuel level
- level sensor
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Abstract
The utility model discloses a kind of oil level indicators, including resistance R1 and fuel level sensor R0, one end of the resistance R1 connects power supply VCC, the other end of resistance R1 connects fuel level sensor R0 and AD sampling end, the other end of fuel level sensor R0 is grounded, and the utility model oil level indicator measurement accuracy is done, and sensor uses patch type chip, price is simple, and sensor reliability is high.And it is encapsulated using SOT23, size is small, and the processing is simple, it can be achieved that higher precision measures.
Description
Technical field
The utility model relates to detection technique field, specifically a kind of oil level indicator.
Background technique
Existing oil level flowmeter sensor is mostly dry-reed, and using breakaway glass pipe, pin needs Bending Processing glass
Pipe, which generates minute crack, will lead to internal inert gas leakage, and contact oxidation is caused to fail.
Sensor matching truck instrument assembly oil level indicating meter, it is desirable that 17 points are at least shown from trunkful to empty van, by
In traditional tongue tube when float drives, total travel closing distance is in 30mm or so, in order to show 680mm effective length safely,
It needs to match 28 tongue tubes, could show required output resistance, circuit theory such as Fig. 1, when fuel level sensor entrucking safely
When work, as tank-level reduces, magnetic float downlink triggers corresponding tongue tube closure, exports different resistance, oil level measuring instrument
The resistance value signal of table receiving sensor output, the parameter list being arranged by instrument chip interior judge practical level height, in instrument
Corresponding fuel oil position is shown on table.
Principles above applies equally to onboard urea tank urea liquid level gauging, is used for truck tail gas processing system.
Utility model content
The purpose of this utility model is to provide a kind of oil level indicators, to solve the problems mentioned in the above background technology.
To achieve the above object, the utility model provides the following technical solutions:
A kind of oil level indicator, including one end connection power supply VCC of resistance R1 and fuel level sensor R0, the resistance R1, resistance
The other end of R1 connects fuel level sensor R0 and AD sampling end, the other end ground connection of fuel level sensor R0, fuel level sensor R0 oil
17 resistance RX1-RX17 compositions, resistance RX1-RX17 are sequentially connected in series.
As a preferred embodiment of the present invention: the resistance RX1-RX17 is all made of Magnetic Memory resistance chip.
As a preferred embodiment of the present invention: the model of the resistance RX1-RX17 is identical.
As a preferred embodiment of the present invention: the resistance RX1-RX17 in the case where north and south pole field acts on respectively resistance from
260 ohm of variations are 600 ohm.
As a preferred embodiment of the present invention: the fuel level sensor R0 is encapsulated using SOT23.
As a preferred embodiment of the present invention: the signal conditioning module includes charge amplification module, voltage amplification mould
Block, second order active low-pass filtering module and voltage are lifted module, and the input terminal connection PVDF piezoelectricity of the charge amplification module is thin
The output signal of film waistband, the input terminal of the output end connection voltage amplification module of charge amplification module, voltage amplification module
Output end connects the input terminal of second order active low-pass filtering module, the output end connection voltage lift of second order active low-pass filtering module
The input terminal of rising mould block, the output end that voltage is lifted module connect single-chip microcontroller.
Compared with prior art, the utility model has the beneficial effects that the utility model oil level indicator measurement accuracy is done, sensing
Device uses patch type chip, and price is simple, and sensor reliability is high.And it is encapsulated using SOT23, size is small, and the processing is simple, can
Realize higher precision measurement.
Detailed description of the invention
Fig. 1 is prior art fuel level sensor circuit diagram.
Fig. 2 is the design fuel level sensor circuit diagram.
Fig. 3 is fuel level sensor resistance variations datagram.
Fig. 4 is fuel level sensor encapsulation schematic diagram.
Fig. 5 is the principles of the present invention figure.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Please refer to Fig. 1-5, embodiment 1: in the utility model embodiment, a kind of oil level indicator, including resistance R1 and oil level are passed
Sensor R0, as shown in figure 5, the resistance R1 one end connect power supply VCC, resistance R1 the other end connection fuel level sensor R0 and
The tie point of AD sampling end, resistance R1 and fuel level sensor R0 are the output point of oil level signal, are acquired by AD sampling technique
Controller, display or other terminal installations, the other end ground connection of fuel level sensor R0 are transferred to after the signal.
The fuel level sensor R0 mechanical structure of the design uses existing sensor shape, and shape does not change；Oil level passes
Sensor R0 is using 17 Magnetic Memory resistance chip compositions, as shown in Fig. 2, each resistance chip is in the case where north and south pole field acts on respectively
It is 600 ohm that resistance changes from 260 ohm；, apart from 17 points of interior display, to need to match 17 magnetic in effective travel 680mm
Memory resistor chip, in oil tank liquid level from high to low change procedure, sensor output 4590 ohm to 10710 ohm it
Between change, as shown in figure 3, since resistance value is different from crude oil level sensor, so needing to redesign interface circuit and core
Piece algorithm.
Embodiment 2: on the basis of embodiment 1, the fuel level sensor R0 of the design uses patch type chip (such as Fig. 4),
Price is simple, and sensor reliability is high.It is encapsulated using SOT23, size is small, and the processing is simple, it can be achieved that higher precision measures.
The design is applicable not only to common oil level indicator above-mentioned, applies also for industrial level meter, industrial level meter is using same
Except the signal source of sample, signal processing does not connect instrument not instead of directly, is converted into simulation or digital signal (Modbuas, 4-
20mA, 0-10V etc.).
It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and
And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms
Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new
The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in
All changes in justice and range are embraced therein.It should not treat any reference in the claims as limiting
Related claim.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (5)
1. a kind of oil level indicator, including resistance R1 and fuel level sensor R0, which is characterized in that one end of the resistance R1 connects power supply
The other end of VCC, resistance R1 connect fuel level sensor R0 and AD sampling end, the other end ground connection of fuel level sensor R0, and oil level passes
17 resistance RX1-RX17 compositions of sensor R0 oil, resistance RX1-RX17 are sequentially connected in series.
2. a kind of oil level indicator according to claim 1, which is characterized in that the resistance RX1-RX17 is all made of Magnetic Memory electricity
Hinder chip.
3. a kind of oil level indicator according to claim 1, which is characterized in that the model of the resistance RX1-RX17 is identical.
4. a kind of oil level indicator according to claim 1, which is characterized in that the resistance RX1-RX17 is in north and south pole field point
Zuo Yong not descend resistance to change from 260 ohm is 600 ohm.
5. a kind of oil level indicator according to claim 1 to 4, which is characterized in that the fuel level sensor R0 is used
SOT23 encapsulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822119951.7U CN209372181U (en) | 2018-12-18 | 2018-12-18 | A kind of oil level indicator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822119951.7U CN209372181U (en) | 2018-12-18 | 2018-12-18 | A kind of oil level indicator |
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| CN209372181U true CN209372181U (en) | 2019-09-10 |
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| CN201822119951.7U Active CN209372181U (en) | 2018-12-18 | 2018-12-18 | A kind of oil level indicator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109443484A (en) * | 2018-12-18 | 2019-03-08 | 上海米尔圣传感器有限公司 | A kind of oil level indicator |
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2018
- 2018-12-18 CN CN201822119951.7U patent/CN209372181U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109443484A (en) * | 2018-12-18 | 2019-03-08 | 上海米尔圣传感器有限公司 | A kind of oil level indicator |
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