CN201974218U - Hall switch-type oil-level meter based on single-chip communication - Google Patents
Hall switch-type oil-level meter based on single-chip communication Download PDFInfo
- Publication number
- CN201974218U CN201974218U CN2011200319610U CN201120031961U CN201974218U CN 201974218 U CN201974218 U CN 201974218U CN 2011200319610 U CN2011200319610 U CN 2011200319610U CN 201120031961 U CN201120031961 U CN 201120031961U CN 201974218 U CN201974218 U CN 201974218U
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- hall
- level meter
- circuit
- type oil
- single chip
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Abstract
The utility model discloses a Hall switch-type oil-level meter based on single-chip communication, which comprises a metal pipe, wherein a floater which upwards and downwards moves along with the change of a liquid level is arranged on the metal pipe, and a magnetic ring is arranged in the floater; a single chip and a plurality of Hall circuits are arranged in the metal pipe, and the Hall circuits are all connected with the single chip; and the output end of the single chip is connected with an amplifying circuit. The Hall switch-type oil-level meter has the advantages of safety, reliability, no mechanical contact, no electric spark, low power consumption, shock resistance and corrosion resistance; the Hall switch-type oil-level meter has a communication function; an output signal is stable, a continuously-changed voltage signal can be output, and the output range can be randomly regulated; the Hall switch-type oil-level meter has an error-correcting function; the Hall circuits are scanned by using the single chip, and when the Hall circuits are encoded, once the fault of a certain Hall circuit occurs, the Hall circuit can be used as a record to be saved in a memory by the single chip, and the Hall circuit is ignored in the later detection, so that even though a single Hall circuit is damaged, the integral use of the oil-level meter can not be influenced, and the operating reliability of the oil-level meter is improved.
Description
Technical field
The utility model relates to a kind of oil level indicator, is a kind of Hall switch type oil level indicator based on single chip communication that is used to detect the automotive oil tank oil mass specifically.
Background technology
Along with the automotive automation degree is more and more higher, automobile also improves constantly the requirement of fuel-quantity transducer quality, traditional float-type (sliding rheostat) oil level indicator and be difficult to be fit to the trend of automotive automation based on the straight barrel type oil level indicator of tongue tube.The float-type oil level indicator when the fuel tank volume is excessive, connecting link easy fracture, and swept resistance is easy to wear, serviceable life is short; The straight tube of tongue tube partial pressure type oil level is in respect of the contact, and the signal output prograin is not high.Both's communication capacity useless.
Summary of the invention
Goal of the invention: the utility model is just existing oil level indicator weak point in serviceable life, does not have the deficiency of communication function, a kind of Hall switch type oil level indicator based on single chip communication is provided.
In order to solve the problems of the technologies described above, the utility model has adopted following technical scheme:
A kind of Hall switch type oil level indicator based on single chip communication comprises metal tube, is provided with the float that moves up and down along with liquid level change on metal tube, is provided with magnet ring in float; Be provided with single-chip microcomputer and some Hall circuits in the described metal tube, Hall circuit all links to each other with single-chip microcomputer; The output terminal of single-chip microcomputer is connected with amplifying circuit.
Wherein, described Hall circuit, single-chip microcomputer and amplifying circuit are arranged on the printed circuit board (PCB), and printed circuit board (PCB) is fixed in the metal tube.
The magnet ring position that utilizes the Hall circuit array detection to float with oil level is scanned the Hall circuit array and is encoded by single-chip microcomputer, is that oil level just converts the corresponding simulating voltage signal to the magnet ring position, exports by communication interface after amplifying.
Beneficial effect: the Hall switch type oil level indicator based on single chip communication of the present utility model has following characteristics:
(1) safe and reliable: there is not mechanical contact, no electric spark, low in energy consumption, anti-vibration, corrosion-resistant.
(2) possess communication function: stable output signal, exportable continually varying voltage signal, output area can be regulated arbitrarily, and communication interface can be provided.
(3) has error correction: with the oil level indicator passive output signal was different in the past, the utility model is to use single-chip microcomputer that Hall circuit is scanned, Hall circuit is when coding, in case certain Hall circuit breaks down, single-chip microcomputer can with its as recorded and stored in memory body, neglect this Hall circuit in the detection afterwards, also can not influence the whole use of oil level indicator, improve the oil level indicator reliability of operation even therefore single Hall circuit damages.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the connection diagram of the utility model Hall circuit, single-chip microcomputer and amplifying circuit.
Embodiment:
Below in conjunction with accompanying drawing the utility model is done further explanation.
As shown in Figure 1, 2, the Hall switch type oil level indicator based on single chip communication of the present utility model comprises the screwed metal tube 1 in upper end, during use, fixes this oil level indicator by nut.Metal tube 1 is provided with the float 2 that moves up and down along with the liquid level height, is provided with magnet ring 3 in the float 2.At metal tube 1 internal fixation printed circuit board (PCB) 4 is arranged, printed circuit board (PCB) 4 is provided with some Hall circuits 5 that are intervally arranged along metal tube 1 length direction, also is provided with single-chip microcomputer 6 on the printed circuit board (PCB) 4, and described some Hall circuits 5 all are electrically connected with single-chip microcomputer 6; The output terminal of single-chip microcomputer 6 is connected with amplifying circuit 7, and the output terminal of amplifying circuit 7 is connected with output line 8.Described single-chip microcomputer can be used the AVR series monolithic of atmel corp.
Described Hall circuit 5 is the Hall switch integrated circuit, and the Hall switch integrated circuit partly is made up of Hall voltage generator, power supply timing switch circuit unit, dynamic offset voltage compensating circuit unit, sampling and holding circuit unit, differential amplifier, double trigger, output lock, MOS field effect efferent duct etc.Be provided with the power supply timing switch circuit in the chip, the may command Hall circuit alternately is in " dormancy " and " waking up " state, under the 2.75V electric power thus supplied, source current is 2 μ A when " dormancy ", when " waking up " 3mA, on average be about 2.75 μ A, average power consumption has only 8 μ W, reduces by 3 to 4 orders of magnitude than traditional Hall circuit power consumption; Being provided with dynamic offset voltage compensating circuit, is in order to eliminate the offset voltage that temperature and mechanical stress produce the Hall voltage generator, improves the temperature stability of Hall circuit and to the sensitivity in magnetic field; The setting of double trigger then is to trigger function in order to make Hall circuit have full magnetic pole, promptly no matter use the N utmost point or S pole field all can trigger Hall circuit work, changed traditional Hall circuit and must fix the shortcoming of using a certain magnetic field, made that use is more convenient.
The Hall circuit array changes into corresponding voltage or current signal by the single-chip microcomputer overall treatment, amplifies output voltage signal then.When liquid position in the fuel tank increases or reduce, float 2 moves up and down outside metal tube 1, Hall circuit 5 output levels of relative position change, and 6 scanning discovery floats 2 of single-chip microcomputer move to this point, and single-chip microcomputer 6 can convert the relevant position to the voltage signal of a correspondence.Along with moving up and down of float, single-chip microcomputer can be exported the continually varying voltage signal from output line 8.
The above only is a preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (2)
1. the Hall switch type oil level indicator based on single chip communication comprises metal tube (1), is provided with the float (2) that moves up and down along with liquid level change on metal tube (1), is provided with magnet ring (3) in float (2); It is characterized in that: be provided with single-chip microcomputer (6) and some Hall circuits (5) in the described metal tube (1), Hall circuit (5) all links to each other with single-chip microcomputer (6); The output terminal of single-chip microcomputer (6) is connected with amplifying circuit (7).
2. a kind of Hall switch type oil level indicator according to claim 1 based on single chip communication, it is characterized in that: described Hall circuit (5), single-chip microcomputer (6) and amplifying circuit (7) are arranged on the printed circuit board (PCB) (4), and printed circuit board (PCB) (4) is fixed in the metal tube (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200319610U CN201974218U (en) | 2011-01-30 | 2011-01-30 | Hall switch-type oil-level meter based on single-chip communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200319610U CN201974218U (en) | 2011-01-30 | 2011-01-30 | Hall switch-type oil-level meter based on single-chip communication |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201974218U true CN201974218U (en) | 2011-09-14 |
Family
ID=44579319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200319610U Expired - Fee Related CN201974218U (en) | 2011-01-30 | 2011-01-30 | Hall switch-type oil-level meter based on single-chip communication |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201974218U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075773A (en) * | 2014-01-09 | 2014-10-01 | 宋德齐 | Electromagnetic scale liquid level meter |
| CN105352549A (en) * | 2015-11-28 | 2016-02-24 | 宁波市德霖机械有限公司 | Terminal control display device of lawn mower |
| CN108072425A (en) * | 2016-11-14 | 2018-05-25 | 现代自动车株式会社 | Multi probe transmitter and the case with Multi probe transmitter |
-
2011
- 2011-01-30 CN CN2011200319610U patent/CN201974218U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075773A (en) * | 2014-01-09 | 2014-10-01 | 宋德齐 | Electromagnetic scale liquid level meter |
| CN105352549A (en) * | 2015-11-28 | 2016-02-24 | 宁波市德霖机械有限公司 | Terminal control display device of lawn mower |
| CN108072425A (en) * | 2016-11-14 | 2018-05-25 | 现代自动车株式会社 | Multi probe transmitter and the case with Multi probe transmitter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110914 Termination date: 20170130 |