CN106595812A - Liquid level sensor based on resonance sound frequency of closed container cavity - Google Patents
Liquid level sensor based on resonance sound frequency of closed container cavity Download PDFInfo
- Publication number
- CN106595812A CN106595812A CN201611196529.0A CN201611196529A CN106595812A CN 106595812 A CN106595812 A CN 106595812A CN 201611196529 A CN201611196529 A CN 201611196529A CN 106595812 A CN106595812 A CN 106595812A
- Authority
- CN
- China
- Prior art keywords
- liquid level
- closed container
- level sensor
- probe
- resonance sound
- Prior art date
- Legal status (The legal status 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 status listed.)
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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
- G01F23/22—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
- G01F23/28—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 the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/296—Acoustic waves
- G01F23/2966—Acoustic waves making use of acoustical resonance or standing waves
Abstract
The invention discloses a liquid level sensor based on a resonance sound frequency of a closed container cavity. The liquid level sensor comprises a probe, a closed container and an amplifier, wherein the inner side of the probe and the wall of the closed container are tightly mounted; the probe is connected with the amplifier through a signal wire; and the probe is made of piezoelectric ceramics. The liquid level sensor has the advantages of reasonable design, non-contact measurement, mounting and maintaining convenience and high reliability.
Description
Technical field
The present invention relates to a kind of liquid level sensor based on closed container cavity resonance sound frequency, belongs to non-electricity measure
Technical field.
Background technology
Liquid level sensor（Static pressure liquid level meter/fluid level transmitter/liquid level sensor/level sensor）It is a kind of measurement liquid level
Pressure sensor.Static pressure throw-in type liquid transmitter（Liquid level gauge）Be based on survey the height of fluid pressure and the liquid into than
The principle of example, using external advanced isolated form diffusion silicon-sensitive element or ceramic capacitive pressure sensitive sensor, static pressure is turned
Electric signal is changed to, then through temperature-compensating and linear amendment, changes into standard electric signal（Generally 4～20mA/1～5VDC）.
Liquid level sensor is divided into two classes：One class is contact, including single flange static pressure/bis- flange differential pressure liquid level transmitter, float-ball type liquid
Position transmitter, magnetic level transmitter, throw-in type liquid transmitter, electronic inner float ball fluid level transmitter, electric float liquid level becomes
Device, capacitive liquid level transmitter, magnetostrictive liquid level transducer is sent to wait upon and take fluid level transmitter etc..Equations of The Second Kind is contactless, is divided
For supersonic level sensor, radar level transmitter etc..
At present, the measurement of oil tank of vehicle liquid level typically adopts slide potentiometer formula or magnetic-inductive dry-reed tube in prior art
Formula, is required for installing certain mechanical mechanism in fuel tank, and vehicle these mechanical mechanisms in motion process are constantly in vibration
State, has a strong impact on certainty of measurement and service life.For this reason, it may be necessary to design a kind of new technical scheme, existing skill can be overcome
The deficiency of art.
The content of the invention
It is an object of the invention to provide a kind of liquid level sensor based on closed container cavity resonance sound frequency, it is to avoid
Contact of the sensor with liquid during work, with preferable security and anti-interference, and measures essence height, long service life
Deng meeting actual operation requirements.
For achieving the above object, the present invention provides following technical scheme：One kind is based on closed container cavity resonance sound audio
The liquid level sensor of rate, including：Probe, closed container and amplifier, the inner side of the probe is tight with the wall of the closed container
Close installation, the probe is connected by holding wire with the amplifier；
And the probe is made by piezoelectric ceramics.
Used as the improvement of above-mentioned technical proposal, the liquid level sensor based on closed container cavity resonance sound frequency is also
Including dsp chip, and the dsp chip is connected with the amplifier.
The voltage of the circuit output constituted with other electron component as the improvement of above-mentioned technical proposal, the dsp chip/
Electric current and liquid level direct proportionality in the closed container.
Closed container of the present invention is oil tank of vehicle or other closed storage containers etc..
The technique effect and advantage of the present invention：A kind of liquid based on closed container cavity resonance sound frequency of the present invention
Level sensor, compared with traditional liquid level e measurement technology, sensor is not contacted the liquid level sensor with liquid during work, with safety
Property it is high, anti-interference is good, and measurement essence is high, the features such as long service life, meets actual operation requirements.
Description of the drawings
Fig. 1 is that a kind of liquid level sensor principle based on closed container cavity resonance sound frequency of the present invention is illustrated
Figure；
In figure：1- signal amplifiers, 2-DSP chips, 3- sensor signal output ends, 4- probes, 5- fuel tanks.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
The invention provides a kind of liquid level sensor based on closed container cavity resonance sound frequency, including probe 4, institute
State probe 4 to snugly fit on the shell of closed container 5, the probe 4 is connected signal with amplifier 1 by wire, described to put
To pop one's head in 4 ultra-weak electronic signal of big device 1 amplifies, then gives dsp chip, the dsp chip signal is carried out Fourier transformation and
The finally output of the Digital Signal Processing such as linearisation, the dsp chip and other electronic circuits is high with liquid level in the closed container 5
The voltage or electric current of degree direct proportionality；Additionally, the probe 4 is made up of piezoelectric ceramics.
Concrete operating principle：During work, by it is described probe 4 be arranged on the shell of closed container 5 on, it is ensured that without part with it is close
The liquid closed in container 5 contacts, and then causes the liquid level sensor to belong to contactless, installs and easy to maintenance, and reliability is high,
Safe, certainty of measurement is high, long service life.
Note：Closed container of the present invention is oil tank of vehicle or other closed storage containers etc..
Finally it should be noted that：The preferred embodiments of the present invention are the foregoing is only, the present invention is not limited to,
Although being described in detail to the present invention with reference to the foregoing embodiments, for a person skilled in the art, it still may be used
To modify to the technical scheme described in foregoing embodiments, or equivalent is carried out to which part technical characteristic,
All any modification, equivalent substitution and improvements within the spirit and principles in the present invention, made etc., should be included in the present invention's
Within protection domain.
Claims (3)
1. a kind of liquid level sensor based on closed container cavity resonance sound frequency, it is characterised in that：Including：Probe（4）, it is close
Close container（5）And amplifier（1）, the probe（4）Inner side and the closed container（5）Wall close installation, the probe
（4）By holding wire and the amplifier（1）It is connected；
And the probe（4）It is made by piezoelectric ceramics.
2. a kind of liquid level sensor based on closed container cavity resonance sound frequency according to claim 1, its feature exists
In：The liquid level sensor based on closed container cavity resonance sound frequency also includes dsp chip（2）, and the dsp chip
（2）With the amplifier（1）It is connected.
3. a kind of liquid level sensor based on closed container cavity resonance sound frequency, its feature according to claim 1 and 2
It is：The dsp chip（2）With the voltage/current and the closed container of the circuit output of other electron component composition（5）It is interior
Liquid level direct proportionality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611196529.0A CN106595812A (en) | 2016-12-22 | 2016-12-22 | Liquid level sensor based on resonance sound frequency of closed container cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611196529.0A CN106595812A (en) | 2016-12-22 | 2016-12-22 | Liquid level sensor based on resonance sound frequency of closed container cavity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106595812A true CN106595812A (en) | 2017-04-26 |
Family
ID=58602406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611196529.0A Pending CN106595812A (en) | 2016-12-22 | 2016-12-22 | Liquid level sensor based on resonance sound frequency of closed container cavity |
Country Status (1)
| Country | Link |
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| CN (1) | CN106595812A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109060077A (en) * | 2018-08-16 | 2018-12-21 | 杭州容大智造科技有限公司 | A kind of equipment and Wiper system using bath of glass height in sound detection water tank |
| CN109163779A (en) * | 2018-08-16 | 2019-01-08 | 杭州容大智造科技有限公司 | A kind of equipment and Wiper system using bath of glass height in current detecting water tank |
| CN109737920A (en) * | 2019-01-07 | 2019-05-10 | 太原理工大学 | Hydrostatic level based on double fast-response probes |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201622097U (en) * | 2009-09-18 | 2010-11-03 | 武汉理工大学 | Ultrasonic gasoline tank oil level sensor |
| CN202080193U (en) * | 2011-05-21 | 2011-12-21 | 徐玲 | Water storage tank water level display warning device of automobile windscreen wiper |
| CN105987737A (en) * | 2015-02-13 | 2016-10-05 | 中国科学院声学研究所 | Ultrasonic liquid level detector and detection method |
| CN106124001A (en) * | 2016-07-26 | 2016-11-16 | 厦门精图信息技术有限公司 | Traffic section Water Depth Information shared system based on Internet of Things and method |
-
2016
- 2016-12-22 CN CN201611196529.0A patent/CN106595812A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201622097U (en) * | 2009-09-18 | 2010-11-03 | 武汉理工大学 | Ultrasonic gasoline tank oil level sensor |
| CN202080193U (en) * | 2011-05-21 | 2011-12-21 | 徐玲 | Water storage tank water level display warning device of automobile windscreen wiper |
| CN105987737A (en) * | 2015-02-13 | 2016-10-05 | 中国科学院声学研究所 | Ultrasonic liquid level detector and detection method |
| CN106124001A (en) * | 2016-07-26 | 2016-11-16 | 厦门精图信息技术有限公司 | Traffic section Water Depth Information shared system based on Internet of Things and method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109060077A (en) * | 2018-08-16 | 2018-12-21 | 杭州容大智造科技有限公司 | A kind of equipment and Wiper system using bath of glass height in sound detection water tank |
| CN109163779A (en) * | 2018-08-16 | 2019-01-08 | 杭州容大智造科技有限公司 | A kind of equipment and Wiper system using bath of glass height in current detecting water tank |
| CN109737920A (en) * | 2019-01-07 | 2019-05-10 | 太原理工大学 | Hydrostatic level based on double fast-response probes |
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Application publication date: 20170426 |