CN209182731U - A kind of level gauging Circuits and Systems - Google Patents
A kind of level gauging Circuits and Systems Download PDFInfo
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- CN209182731U CN209182731U CN201822274176.2U CN201822274176U CN209182731U CN 209182731 U CN209182731 U CN 209182731U CN 201822274176 U CN201822274176 U CN 201822274176U CN 209182731 U CN209182731 U CN 209182731U
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- 239000007788 liquid Substances 0.000 claims abstract description 76
- 238000001514 detection method Methods 0.000 claims abstract description 70
- 230000006698 induction Effects 0.000 claims description 18
- 239000004065 semiconductor Substances 0.000 claims description 17
- 230000003321 amplification Effects 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 9
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 9
- 238000005259 measurement Methods 0.000 abstract description 12
- 238000010586 diagram Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000005355 Hall effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Abstract
The utility model provides a kind of level gauging Circuits and Systems, is related to technical field of liquid level measurement.The level gauging circuit includes current source, multiple liquid level detection units and output port, each liquid level detection unit includes load resistance and detection module, one end of detection module is electrically connected with current source, the other end of detection module is electrically connected with load resistance, is electrically connected after the load resistance series connection of multiple liquid level detection units with current source；Wherein, detection unit is in normally open, and is closed when close to a magnetic float, so that the liquid level detection unit in rear stage is bypassed and the output port output voltage.Level gauging Circuits and Systems provided by the utility model have output port output voltage value and liquid level height it is linear so that for liquid level measurement in use with advantage more convenient in calculating.
Description
Technical field
The utility model relates to technical field of liquid level measurement, in particular to a kind of level gauging Circuits and Systems.
Background technique
Currently, the measurement for liquid level, general using the cascade mode of measuring unit is measured, and still, mesh
Before generally use the measurement that nonlinear mode carries out liquid level, i.e., with its electric circuit characteristic, output signal and tested liquid level it
Between be in non-linear relation, in use with it is very inconvenient in calculating.
Utility model content
The purpose of this utility model is to provide a kind of level gauging circuits, to solve in the prior art for the survey of liquid level
Amount in use with problem very inconvenient in calculating.
The another object of the utility model is to provide a kind of liquid level measuring system, to solve in the prior art for liquid level
Measurement in use with problem very inconvenient in calculating.
The utility model is realized in this way:
On the one hand, the utility model embodiment provides a kind of level gauging circuit, and the level gauging circuit includes electric current
Source, multiple liquid level detection units and output port, each liquid level detection unit include load resistance and detection module,
One end of the detection module is electrically connected with the current source, and the other end of the detection module is electrically connected with the load resistance
It connects, is electrically connected after the load resistance series connection of the multiple liquid level detection unit with the current source；Wherein, at the detection unit
Be closed in normally open, and when close to a magnetic float so that the liquid level detection unit in rear stage be bypassed and
The output port output voltage.
Further, the current source includes voltage source and current mirror module, the voltage source and the current mirror module
Electrical connection, and the voltage source is used to provide reference voltage for the current mirror module, the current mirror module is used for according to institute
State the electric current of reference voltage output current source.
Further, the current mirror module includes current mirror chip, and the current mirror chip includes input pin, output
Pin and reference voltage pin, the reference voltage pin are electrically connected with the voltage source, and the input pin is used for foundation
The reference voltage of the reference voltage pin determines input voltage, and the output pin is for the input according to the input pin
Voltage determines output electric current.
Further, the model of the current mirror chip includes ADL5315.
Further, the voltage source includes DC/DC module, the input terminal and a power electric connection of the DC/DC module,
The output end of the DC/DC module is electrically connected with the current mirror module.
Further, the detection module includes Hall sensor, and the Hall sensor includes induction pieces and switch member
Part, the induction pieces are electrically connected with the switch element, and the switch element is electric with the load resistance, the current source respectively
Connection, the induction pieces are used to control the switch element closure when close to the magnetic float, so that the load resistance
Closed circuit is formed between the current source.
Further, the switch element includes metal-oxide-semiconductor, and the induction pieces are electrically connected with the grid of the metal-oxide-semiconductor, described
The source electrode of metal-oxide-semiconductor is electrically connected with the current source in advance, and the drain electrode of the metal-oxide-semiconductor is electrically connected with the load resistance.
Further, the detection module further includes operational amplifier, and the induction pieces are defeated with the operational amplifier
Enter endpoint electrical connection, the output end of the operational amplifier is electrically connected with the switch element.
Further, the level gauging circuit further includes signal amplification unit, the signal amplification unit with it is described defeated
Exit port electrical connection.
On the other hand, the utility model embodiment additionally provides a kind of liquid level measuring system, the liquid level measuring system packet
Magnetic float and level gauging circuit are included, the detection unit is used to be closed when close to the magnetic float, and in different inspections
When surveying unit closure, the output port of the level gauging circuit exports different voltages.
Compared with the prior art, the utility model has the following beneficial effects:
The utility model provides a kind of level gauging circuit, which includes current source, the inspection of multiple liquid levels
Survey unit and output port, each liquid level detection unit includes load resistance and detection module, one end of detection module with
Current source electrical connection, the other end of detection module are electrically connected with load resistance, the load resistance series connection of multiple liquid level detection units
It is electrically connected afterwards with current source；Wherein, detection unit is in normally open, and is closed when close to a magnetic float, so as to be in
The liquid level detection unit of rear stage is bypassed and the output port output voltage.Due to liquid level provided by the utility model
Measuring circuit is measured by the way of current source, and current level is higher, the liquid level detection unit on liquid level
Quantity is fewer, and the load resistance in closed circuit on the level gauging circuit is fewer, and the voltage value of output port output is smaller,
I.e. according to Ohm's law it is found that the height of voltage value and liquid level that the output port of level gauging circuit exports is linear,
So that for liquid level measurement in use with it is more convenient in calculating.
To enable the above objects, features, and advantages of the utility model to be clearer and more comprehensible, preferred embodiment is cited below particularly, and
Cooperate appended attached drawing, is described in detail below.
Detailed description of the invention
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Usually here in attached drawing description and
The component of the utility model embodiment shown can be arranged and be designed with a variety of different configurations.Therefore, below to attached
The detailed description of the embodiments of the present invention provided in figure is not intended to limit the range of claimed invention,
But it is merely representative of the selected embodiment of the utility model.Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without creative efforts, belongs to the model of the utility model protection
It encloses.
Fig. 1 shows the circuit diagram of level gauging circuit provided by the utility model embodiment.
Fig. 2 shows the module diagrams of current source provided by the utility model embodiment.
Fig. 3 shows the circuit diagram of voltage source provided by the utility model embodiment.
Fig. 4 shows the circuit diagram of current mirror module provided by the utility model embodiment.
Fig. 5 shows the circuit diagram of detection module provided by the utility model embodiment.
Fig. 6 shows the circuit diagram of signal amplification unit provided by the utility model embodiment.
Fig. 7 shows the circuit diagram of liquid level measuring system provided by the utility model embodiment.
Icon: 100- level gauging circuit；110- current source；111- voltage source；112- current mirror module；1121- electric current
Mirror chip；120- liquid level detection unit；121- load resistance；122- detection module；1221- induction pieces；1222- switch element；
1223- operational amplifier；130- output port；200- liquid level measuring system；210- magnetic float.
Specific embodiment
Below in conjunction with attached drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out clear
Chu is fully described by, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole realities
Apply example.The component of the utility model embodiment being usually described and illustrated herein in the accompanying drawings can be come with a variety of different configurations
Arrangement and design.Therefore, the detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit below
The range of claimed invention, but it is merely representative of the selected embodiment of the utility model.Based on the utility model
Embodiment, those skilled in the art's every other embodiment obtained without making creative work, all
Belong to the range of the utility model protection.
In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is set
Set ", " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection,
Or it is integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, intermediary can also be passed through
It is indirectly connected, can be the connection inside two elements.For the ordinary skill in the art, it can be managed with concrete condition
Solve the concrete meaning of above-mentioned term in the present invention.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
With reference to the accompanying drawing, it elaborates to some embodiments of the utility model.In the absence of conflict, under
The feature in embodiment and embodiment stated can be combined with each other.
First embodiment
Referring to Fig. 1, the utility model embodiment provides a kind of level gauging circuit 100, the level gauging circuit 100
Including current source 110, multiple liquid level detection units 120 and output port 130, wherein each liquid level detection unit 120 is wrapped
Include load resistance 121 and detection module 122, one end of detection module 122 is electrically connected with current source 110, detection module 122 it is another
One end is electrically connected with load resistance 121, and the load resistance 121 of multiple liquid level detection units 120 is electrically connected after connecting with current source 110
It connects；Wherein, detection unit is in normally open, and is closed when close to a magnetic float 210, so that output port 130 exports
Voltage.
Specifically, during liquid level increases or reduces, magnetic float 210 is suspended in liquid level always.It needs to illustrate
, when liquid level detection unit 120 is close to magnetic float 210, liquid level detection unit 120 is connected under the action of a magnetic force,
So that circuit is connected, because when liquid level is in different height, the quantity of the load resistance 121 in forming circuit is not identical, make
The output voltage values for obtaining system output are not identical, and then can calculate current level by voltage value.Also, due to
The raising or reduction of liquid level, the output voltage of the output port 130 of level gauging circuit 100 linear can change, because
This is upper more convenient for the calculating and use of the voltage value of the output end of system.
Wherein, current source 110 described in the present embodiment refers to that its terminal can provide certain electricity to outside in tolerance range
Stream is regardless of the voltage at its both ends is how many, basic property that there are two the tools of current source 110: first, the electric current that it is provided is fixed
Value I or regular hour function I (t) is unrelated with the voltage at both ends.Second, itself electric current of current source 110 is determining, and it
The voltage at both ends is arbitrary.
Specifically, referring to Fig. 2, in the present embodiment, current source 110 includes voltage source 111 and current mirror module 112,
Voltage source 111 is electrically connected with current mirror module 112, and voltage source 111 is used to provide reference voltage for current mirror module 112, electricity
Flow the electric current that mirror module 112 is used for benchmark voltage output current source 110.
Wherein, voltage source 111 provided in this embodiment uses DC/DC module, the input terminal of DC/DC module and power supply electricity
Connection, the output end of DC/DC module are electrically connected with current mirror module 112.For example, the input terminal of DC/DC module and battery electricity
Connection realizes the conversion to voltage by DC/DC module, and then high voltage is converted to lower voltage, to be reached for electric current
Mirror provides operating voltage and reference voltage, plays the role of pressure regulation and pressure stabilizing.The circuit of DC/DC module referring to Fig. 3, wherein,
The present embodiment passes through the voltage exported after DC/DC module is converted as 5V, of course, in other some embodiments, DC/DC mould
The output voltage of block also can be for other values.Meanwhile other modules also can be selected in voltage source 111, such as directly adopt big function
The battery of rate, the present embodiment do not do any restriction to this.
Specifically, current mirror by internal current moding circuit by input stage current mirror be out-put supply electric current, starting voltage/
The effect of electric current conversion.Design compromise by using DC/DC module as voltage source 111, can its take into account plant bulk and
Measurement accuracy, current mirror are made of special chip and external circuit.
Specifically, referring to Fig. 4, the electron mirror current mirror module 112 includes current mirror chip 1121, current mirror chip
1121 include input pin, output pin and reference voltage pin, and reference voltage pin is electrically connected with voltage source 111, is inputted
Pin determines that input voltage, output pin are used for the input according to input pin for the reference voltage of benchmark voltage pin
Voltage determines output electric current.
Wherein, the model ADL5315 of current mirror chip 1121 provided in this embodiment, of course, in others
In embodiment, the current mirror chip 1121 of other signals can also be used, the present embodiment does not do any restriction.
In the present embodiment, reference voltage pin is the VPOS pin of current mirror chip 1121, and input pin draws for INPT
Foot, output pin are IOUT pin, wherein for ADL5315 chip, the benchmark electricity of input pin and reference voltage pin
The difference of pressure is 1V, i.e., the voltage value of reference voltage pin is 5V, then the voltage of input pin is 4V, further, with input
Pin connection resistance resistance value be 1k Ω, it is determined that output pin output electric current be 4mA.
Further, referring to Fig. 5, detection module provided in this embodiment 122 uses Hall sensor, wherein Hall
Sensor includes induction pieces 1221 and switch element 1222, wherein induction pieces 1221 are electrically connected with switch element 1222, switch member
Part 1222 is electrically connected with load resistance 121, current source 110 respectively, and induction pieces 1221 are used to control when close to magnetic float 210
Switch element 1222 is closed, so as to form closed circuit between load resistance 121 and current source 110.Also, load resistance 121
Also cascade arrangement is used, after the conducting of any one load resistance 121, all load resistances 121 of rear class are bypassed, and all primes
Load electricity 121 with current source formed closed circuit.
It should be noted that induction pieces 1221 are a kind of magnetic field sensor made according to Hall effect, working principle
To there is a Hall semiconductor chip in magnetic field, constant current I passes through the piece from A to B.Under the action of Lorentz force, the electronics of I
Stream offsets to one side when through Hall semiconductor, and the piece is made to generate potential difference in the cd direction, and here it is so-called Hall electricity
Pressure.
Further, switch element 1222 provided in this embodiment uses metal-oxide-semiconductor, the grid of induction pieces 1221 and metal-oxide-semiconductor
Electrical connection, the source electrode of metal-oxide-semiconductor are electrically connected with current source 110 in advance, and the drain electrode of metal-oxide-semiconductor is electrically connected with load resistance 121.Wherein, magnetic
Property float 210 will form a magnetic field since the effect of buoyancy is suspended in liquid level in current fluid level height, with the liquid level etc.
Induction pieces 1221 in high liquid level detection unit 120 generate Hall voltage under the magnetic fields, and pass through Hall electricity
Metal-oxide-semiconductor is connected in pressure, and then forms closed circuit on level gauging circuit 100.Of course, in some other embodiments
In, switch element 1222 or other elements, such as triode, the present embodiment do not do any restriction to this.
Further, since the value of Hall voltage may be smaller, in order to which the value of Hall voltage consistently achieves metal-oxide-semiconductor
Conducting voltage, in the present embodiment, detection module 122 further include operational amplifier 1223, induction pieces 1221 and operational amplifier
1223 input endpoint electrical connection, the output end of operational amplifier 1223 are electrically connected with switch element 1222.Operational amplifier
1223 (referred to as " amplifier ") are the circuit units with very high-amplification-factor, therefore the value that can be realized Hall voltage is consistently greater than
The effect of the conducting voltage of metal-oxide-semiconductor.
Further, when any one liquid level detection unit 120 is closed, the output port 130 of level gauging circuit 100
Output voltage values can calculate the quantity for the liquid level detection unit 120 being currently on liquid level according to the voltage value, in turn
Determine liquid level.The lesser situation of voltage value due to being likely to occur output in measurement process, so that the voltage value of output can
Error can occur.In view of this, in the present embodiment, level gauging circuit 100 further includes signal amplification unit, signal amplification is single
Member is electrically connected with output port 130.
Wherein, referring to Fig. 6, signal amplification unit provided in this embodiment is realized by signal amplification circuit.
The level gauging circuit 100 provided through this embodiment can be realized the effect that current source 110 measures current level
Fruit makes so that the height of voltage value and liquid level that the output port 130 of level gauging circuit 100 exports is linear
For liquid level measurement in use with it is more convenient in calculating.
Second embodiment
Referring to Fig. 7, the utility model embodiment provides a kind of liquid level measuring system 200, the liquid level measuring system 200
Including level gauging circuit 100 described in magnetic float 210 and first embodiment, detection unit is used for close to magnetic float
It is closed when 210, and in different detection units closure, the output port 130 of level gauging circuit 100 exports different voltages.
Specifically, the working principle of liquid level measuring system 200 provided in this embodiment are as follows:
Magnetic float 210 is suspended on liquid level, is changed with the variation of the height of liquid level, when being in any position,
Liquid level detection unit 120 close to the magnetic float 210 is closed under the action of a magnetic force, and then in level gauging circuit 100
Middle formation closed circuit, output end output voltage, when magnetic float 210 is in different height, different level sensing lists
Member 120 is closed, and in the different closures of liquid level detection unit 120, the number of the load resistance 121 in circuit is different.?
In the case where being powered using current source 110, the electric current in circuit is remained centainly, therefore the output of level gauging circuit 100
The output voltage of port 130 is different, and the voltage of the output end by obtaining level gauging circuit 100 is able to use the side of backstepping
Formula obtains being currently at the number of the liquid level detection unit 120 in closed circuit, and then calculates current liquid level.
Simultaneously as the linear pass of height of voltage value and liquid level that the output port 130 of level gauging circuit 100 exports
System so that for liquid level measurement in use with it is more convenient in calculating.
In conclusion the utility model provides a kind of level gauging circuit, which includes current source, more
A liquid level detection unit and output port, each liquid level detection unit include load resistance and detection module, detection module
One end be electrically connected with current source, the other end of detection module is electrically connected with load resistance, the load of multiple liquid level detection units
It is electrically connected after resistance series connection with current source；Wherein, detection unit is in normally open, and is closed when close to a magnetic float,
So that output port output voltage.Since level gauging circuit provided by the utility model is surveyed by the way of current source
Amount, and current level is higher, the quantity of the liquid level detection unit on liquid level is fewer, the closure on the level gauging circuit
Load resistance in the means of subsistence is fewer, and the voltage value of output port output is smaller, i.e., according to Ohm's law it is found that level gauging circuit
Output port output voltage value and liquid level height it is linear so that for liquid level measurement in use with calculating
On it is more convenient.
In the description of the present invention, it should be noted that term " first ", " second " etc. are only used for distinguishing description,
It is not understood to indicate or imply relative importance.The above descriptions are merely preferred embodiments of the present invention, not
For limiting the utility model, for those skilled in the art, the present invention may have various modifications and changes.It is all
Within the spirit and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in practical
Within novel protection scope.
Claims (10)
1. a kind of level gauging circuit, which is characterized in that the level gauging circuit includes current source, multiple liquid level detection units
And output port, successively cascade arrangement, each liquid level detection unit include load to the multiple liquid level detection unit
Resistance and detection module, one end of the detection module are electrically connected with the current source, the other end of the detection module and institute
Load resistance electrical connection is stated, is electrically connected after the load resistance series connection of the multiple liquid level detection unit with the current source；Wherein,
The liquid level detection unit is in normally open, and is closed when close to a magnetic float, so as to be in the liquid of rear stage
Position detection unit is bypassed and the output port output voltage.
2. level gauging circuit as described in claim 1, which is characterized in that the current source includes voltage source and current mirror mould
Block, the voltage source are electrically connected with the current mirror module, and the voltage source is used to provide benchmark for the current mirror module
Voltage, the current mirror module is for the electric current according to the reference voltage output current source.
3. level gauging circuit as claimed in claim 2, which is characterized in that the current mirror module includes current mirror chip,
The current mirror chip includes input pin, output pin and reference voltage pin, the reference voltage pin and the electricity
Potential source electrical connection, the input pin is used to determine input voltage according to the reference voltage of the reference voltage pin, described defeated
Pin is used to determine output electric current according to the input voltage of the input pin out.
4. level gauging circuit as claimed in claim 3, which is characterized in that the model of the current mirror chip includes
ADL5315。
5. level gauging circuit as claimed in claim 2, which is characterized in that the voltage source includes DC/DC module, described
The output end of the input terminal of DC/DC module and a power electric connection, the DC/DC module is electrically connected with the current mirror module.
6. level gauging circuit as described in claim 1, which is characterized in that the detection module includes Hall sensor, institute
Stating Hall sensor includes induction pieces and switch element, and the induction pieces are electrically connected with the switch element, the switch element
It is electrically connected respectively with the load resistance, the current source, the induction pieces are used to control institute when close to the magnetic float
Switch element closure is stated, so as to form closed circuit between the load resistance and the current source.
7. level gauging circuit as claimed in claim 6, which is characterized in that the switch element includes metal-oxide-semiconductor, the induction
Part is electrically connected with the grid of the metal-oxide-semiconductor, and the source electrode of the metal-oxide-semiconductor is electrically connected with the current source in advance, the drain electrode of the metal-oxide-semiconductor
It is electrically connected with the load resistance.
8. level gauging circuit as claimed in claim 6, which is characterized in that the detection module further includes operational amplifier,
The induction pieces are electrically connected with the input endpoint of the operational amplifier, the output end of the operational amplifier and switch member
Part electrical connection.
9. level gauging circuit as described in claim 1, which is characterized in that the level gauging circuit further includes signal amplification
Unit, the signal amplification unit are electrically connected with the output port.
10. a kind of liquid level measuring system, which is characterized in that the liquid level measuring system includes magnetic float and such as claim 1
To level gauging circuit described in 9 any one, the detection unit is used to be closed when close to the magnetic float, and not
When with detection unit closure, the output port of the level gauging circuit exports different voltages.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822274176.2U CN209182731U (en) | 2018-12-30 | 2018-12-30 | A kind of level gauging Circuits and Systems |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822274176.2U CN209182731U (en) | 2018-12-30 | 2018-12-30 | A kind of level gauging Circuits and Systems |
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| CN209182731U true CN209182731U (en) | 2019-07-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109508064A (en) * | 2018-12-30 | 2019-03-22 | 成都纵横自动化技术股份有限公司 | A kind of level gauging Circuits and Systems |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109508064A (en) * | 2018-12-30 | 2019-03-22 | 成都纵横自动化技术股份有限公司 | A kind of level gauging Circuits and Systems |
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Address after: 7 / F, area a, building 6, No. 200, Tianfu 5th Street, high tech Zone, Chengdu, Sichuan 610000 Patentee after: CHENGDU JOUAV AUTOMATION TECHNOLOGY Co.,Ltd. Country or region after: China Address before: 6a7 / F, Jingrong International Plaza, No.200, Tianfu Fifth Street, hi tech Zone, Chengdu, Sichuan 610000 Patentee before: CHENGDU JOUAV AUTOMATION TECHNOLOGY Co.,Ltd. Country or region before: China |
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