CN209014089U - A kind of water level detection circuit and water storage apparatus - Google Patents
A kind of water level detection circuit and water storage apparatus Download PDFInfo
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- CN209014089U CN209014089U CN201821472409.3U CN201821472409U CN209014089U CN 209014089 U CN209014089 U CN 209014089U CN 201821472409 U CN201821472409 U CN 201821472409U CN 209014089 U CN209014089 U CN 209014089U
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Abstract
The utility model embodiment is related to water level detecting technical field, more particularly to a kind of water level detection circuit and water storage apparatus.Water level detection circuit includes: controller；First switch circuit connect with DC power supply, controller respectively, and is grounded；Second switch circuit connect with DC power supply, controller respectively, and is grounded；First electrode circuit, first electrode circuit are connect with first switch circuit, controller respectively；Reference electrode circuit, with second switch circuit connection；Wherein, controller exports low and high level to control the on off operating mode in first switch circuit and second switch circuit, realization converts alternating current for DC power supply and is supplied to first electrode circuit and reference electrode circuit, and controller is also used to determine the water level information in water storage tank according to the information of voltage of test lead acquisition.The problem of leading to electrode galvanic corrosion is avoided, while also simplifying circuit structure, is reduced costs.
Description
Technical field
The utility model embodiment is related to water level detecting technical field, more particularly to a kind of water level detection circuit and storage
Wetting system.
Background technique
Water level detecting system is nature and a kind of indispensable detection system of general industry circle.Reservoir, water tower, water
Case etc. has required water level detecting.Many of water system equipment is due to locating high-land, and extremely inconvenient up and down, water is sometimes
It will be finished perhaps to have run out and also not know and cause when need to be with water but water shortage or anhydrous available situation.In addition, to
During injecting water in pond, due to not knowing water level conditions, also how much water injection rate is just unable to control, in order to accurately grasp water level
Situation, traditional way are that arrangement personnel carry out artificial monitoring, can not only occupy human and material resources in this way, can also largely effect on work
Make efficiency.Need to realize water level monitoring situation automatic monitoring, digitization, intelligent display, vision or sense of hearing impact thus
Change alarm, one complete system of water level detecting is realized, then staff, which can realize, knows whole equipment in operating room
Water level situation, so not only lower the risk of staff significantly, while more improving the efficiency and simplicity of work.
In household electrical appliance product scope, operative scenario is related to most products of liquid, such as: washing machine, soy bean milk making machine,
Humidifier, ice machine etc., also often uses water level detection circuit.Common water level detection circuit has, float switch type, metal electricity
Polar form, electronic frequency type.In water level detection circuit, most easy to use surely belongs to metal electrode type water level detection circuit, that is, uses
Height of the conductor as electrode detection water level, therefore, metal electrode type water level detection circuit are also widely used.
But inventor is in the process of implementing the utility model, there are following technical problems for the discovery prior art: existing
Have in technology, first way: if Fig. 1, Fig. 1 are the schematic diagrames of electrode type direct current water level detection circuit in current technology, adopting
With electrode type direct current water level detection circuit, by applying certain DC voltage on two (or multiple) electrodes in water tank,
When the two (or multiple) electrodes of water immersion, since water has certain electric conductivity, electric current can be flowed by one of electrode
Then Xiang Shui flows to another (or multiple) electrode, thus can form certain voltage between two (or multiple) electrodes
Difference judges water position status by detection voltage difference, but the maximum drawback of electrode type direct current water level detection circuit is exactly electrode
It fails vulnerable to galvanic corrosion.Electrode is under water,, also can be to electrode even the electric current of very little when there is electric current to flow through electrode
Generate electrolysis.The second way: if Fig. 2, Fig. 2 are the schematic diagrames of electrode type exchange water level detection circuit in current technology,
It uses electrode type to exchange water level detection circuit, needs to generate a friendship by specific integrated circuit in AC signal source circuit
Signal source is flowed, then AC signal is applied on water-immersed two (or multiple) electrodes, since water has certain lead
Electrically, electric current can an electrode wherein, flow in the circuit that water and another (or multiple) electrode are formed, thus can be two
Between a (or multiple) electrode, certain AC voltage difference is formed, water position status is judged by detection AC voltage difference.Although electric
Polar form exchange water level detection circuit can electric corrosion prevention, but existing electrode type exchange water level detection circuit when generating alternating message source need
Dedicated AC power source is wanted, needs to put into biggish resource, meanwhile, it exports in alternating message source to high water level detecting electrode, and
Alternating current signal detection end requires to carry out shaping or enhanced processing to AC signal, therefore causes its AC signal source circuit opposite
Complexity, implementation cost are relatively high.
Utility model content
The utility model embodiment mainly solving the technical problems that provide a kind of water level detection circuit and water storage apparatus,
It can convert DC power supply to alternating current form and carry out exchange water level detecting, avoid direct current water level detecting in the prior art and lead
The problem of sending a telegraph pole galvanic corrosion, while also solving the problems, such as to exchange water level detecting in the prior art circuit occur complicated, at high cost.
In a first aspect, in order to solve the above technical problems, the technical solution that the utility model embodiment uses is: mentioning
For a kind of water level detection circuit, comprising:
Controller；
First switch circuit, one input end are connect with DC power supply, another input termination of the first switch circuit
Ground, the control terminal of the first switch circuit are connect with a control terminal of the controller；
Second switch circuit, one input end are connect with the DC power supply, another input of the second switch circuit
End ground connection, the control terminal of the second switch circuit are connect with another control terminal of the controller；
First electrode circuit, the first electrode circuit respectively with the output end of the first switch circuit, the control
One test lead of device connects；
Reference electrode circuit is connect with the output end of the second switch circuit；
Wherein, the controller is for exporting low and high level to select to be connected the first switch circuit and described second and open
A certain channel in powered-down road, the first electrode circuit and the reference electrode circuit are set to water to be detected when in use
In the water storage tank of position, the controller is also used to be determined in the water storage tank according to the information of voltage of test lead acquisition
Water level information.
The first switch circuit includes the first analog switch chip, and the second switch circuit includes the second analog switch
Chip, first analog switch chip and second analog switch chip are single pole double throw analog switch；
Wherein, when the control terminal of the first switch circuit receives high level, the one of the first switch circuit is defeated
Enter end to connect with the output end of the first switch circuit, to make the DC power supply and the first electrode circuit communication；
When the control terminal of the first switch circuit receives low level, another input terminal of the first switch circuit and described the
The output end of one switching circuit connects, to make the first electrode circuit ground；When the control terminal of the second switch circuit
When receiving low level, an input terminal of the second switch circuit is connect with the output end of the second switch circuit, thus
Make the DC power supply and the reference electrode circuit communication；When the control terminal of the second switch circuit receives high level
When, another input terminal of the second switch circuit is connect with the output end of the second switch circuit, to make the reference
Telegraph circuit ground connection.
Optionally, the water level detection circuit further include:
Second electrode circuit, respectively with another test lead of the output end of the first switch circuit, the controller
Connection, the controller are used to determine water level information according to the information of voltage of two test leads acquisitions.
Optionally, the first electrode circuit includes the first bleeder circuit and first electrode, first bleeder circuit
One end is connect with the output end of the first switch circuit, the other end of first bleeder circuit respectively with the controller
One test lead, first electrode connection, the first electrode are placed in the water storage tank of water level to be detected.
Optionally, first bleeder circuit includes first resistor, one end of the first resistor and the first switch
The output end of circuit connects, the other end of the first resistor respectively with a test lead of the controller, the first electrode
Connection.
Optionally, the second electrode circuit includes the second bleeder circuit and second electrode, second bleeder circuit
One end is connect with the output end of the first switch circuit, the other end of second bleeder circuit respectively with the controller
Another test lead, second electrode connection, the second electrode are placed in the water storage tank of the water level to be detected.
Optionally, second bleeder circuit includes second resistance, one end of the second resistance and the first switch
The output end of circuit connects, the other end of the second resistance respectively with the another test lead of the controller, the second electrode
Connection.
Optionally, the reference electrode circuit includes reference electrode, the reference electrode and the second switch circuit
Output end connection.
Second aspect, in order to solve the above technical problems, the technical solution that the utility model embodiment uses is: mentioning
For a kind of water storage apparatus characterized by comprising
Water level detection circuit as described above,
Water storage tank, first electrode, second electrode and reference electrode in the water level detection circuit are all set in the storage
In sink.
Optionally, the first electrode, the second electrode and the reference electrode are set in the water storage tank not
At water level.
The beneficial effect of the utility model embodiment is: being in contrast to the prior art, the utility model embodiment party
A kind of water level detection circuit of formula, comprising: controller；First switch circuit, one input end are connect with DC power supply, and described
Another input end grounding of one switching circuit, the control terminal of the first switch circuit and a control terminal of the controller connect
It connects；Second switch circuit, one input end are connect with the DC power supply, another input termination of the second switch circuit
Ground, the control terminal of the second switch circuit are connect with another control terminal of the controller；First electrode circuit, described first
Telegraph circuit is connect with a test lead of the output end of the first switch circuit, the controller respectively；Reference electrode circuit,
It connect with the output end of the second switch circuit；Wherein, the controller controls described for exporting low and high level
On off operating mode in one switching circuit and the second switch circuit, and then realizing in the water level detection circuit will be described straight
The DC conversion in galvanic electricity source is alternating current and is supplied to the first electrode circuit and the reference electrode circuit, and described first
Telegraph circuit and the reference electrode circuit are set in the water storage tank of water level to be detected, and the controller is also used to according to institute
The information of voltage of test lead acquisition is stated to determine the water level information in the water storage tank.Controller only need to be high by output as a result,
Low level controls the on off operating mode in first switch circuit and the second switch circuit, and then in the water level detection circuit
The DC conversion of the DC power supply is alternating current and is supplied to the first electrode circuit and the reference electricity by middle realize
Polar circuit, so, the problem of direct current water level detecting leads to electrode galvanic corrosion in the prior art is avoided, while also solving the prior art
There is circuit complexity, problem at high cost in middle exchange water level detecting, simplifies circuit structure, reduces costs.
Detailed description of the invention
One or more embodiments are illustrated by the picture in corresponding attached drawing, these are exemplary
Illustrate not constitute the restriction to embodiment, the element in attached drawing with same reference numbers label is expressed as similar member
Part, unless there are special statement, composition does not limit the figure in attached drawing.
Fig. 1 is the schematic diagram of electrode type direct current water level detection circuit in current technology；
Fig. 2 is the schematic diagram of electrode type exchange water level detection circuit in current technology；
Fig. 3 is a structural block diagram of the utility model embodiment；
Fig. 4 is a structural schematic diagram of the utility model embodiment.
Specific embodiment
For the ease of understanding the utility model, with reference to the accompanying drawings and detailed description, the utility model is carried out more
Detailed description.It should be noted that it can be directly in another element when element is expressed " being fixed on " another element
Upper or placed in the middle there may be one or more therebetween elements.When an element is expressed " connection " another element, it can
To be directly to another element or elements placed in the middle there may be one or more therebetween.This specification is used
Term "vertical", "horizontal", "left" and "right" and similar statement for illustrative purposes only.
Unless otherwise defined, technical and scientific term all used in this specification and the skill for belonging to the utility model
The normally understood meaning of the technical staff in art field is identical.Art used in the description of the utility model in this specification
Language is only for the purpose of describing specific embodiments, and is not intended to limitation the utility model.Art used in this specification
Language "and/or" includes any and all combinations of one or more related listed items.
Fig. 3 and Fig. 4 are please referred to, the utility model embodiment provides a kind of water level detection circuit 100, water level detecting electricity
Road 100 includes: controller 10, first switch circuit 20, second switch circuit 30, first electrode circuit 40 and reference electrode circuit
50；
Wherein, an input terminal of first switch circuit 20 is connect with DC power supply VDD, first switch circuit 20 it is another defeated
Enter end ground connection GND, the control terminal of first switch circuit 20 is connect with a control terminal SwitchA of controller 10；Second switch electricity
One input terminal on road 30 is connect with DC power supply VDD, another input end grounding of second switch circuit 30, second switch circuit 30
Control terminal connect with another control terminal SwitchB of controller 10；Further, first switch circuit 20 includes the first simulation
Switch chip SW1, second switch circuit include the simulation of the second analog switch chip SW2, the first analog switch chip SW1 and second
Switch chip SW2 is single pole double throw analog switch, specifically, an input terminal B1 and direct current of the first analog switch chip SW1
Another input terminal B2 of power vd D connection, the first analog switch chip SW1 is grounded GND, the control of the first analog switch chip SW1
End S1 processed is connect with a control terminal SwitchA of controller 10, and the supply port of the first analog switch chip SW1 connects feeder ear
The ground terminal of VCC, the first analog switch chip SW1 are grounded GND, an input terminal B3 and direct current of the second analog switch chip SW2
Another input terminal B4 of power vd D connection, the second analog switch chip SW2 is grounded GND, the control of the second analog switch chip SW2
End S2 processed is connect with another control terminal SwitchB of controller 10, and the supply port of the second analog switch chip SW2 connects feeder ear
The ground terminal of VCC, the second analog switch chip SW2 are grounded GND.Optionally, the simulation of the first analog switch chip SW1 and second is opened
Closing chip SW2 includes Ti SN74LVC1G3157-Q1.
The test lead Water_L1 with the output end of first switch circuit 20, controller 10 respectively of first electrode circuit 40
Connection；Further, first electrode circuit 40 includes the first bleeder circuit 41 and first electrode J1, and the one of the first bleeder circuit 41
End connect with the output end of first switch circuit 20, the other end of the first bleeder circuit 41 respectively with a test lead of controller 10
Water_L1, first electrode J1 connection, first electrode J1 are placed in the water storage tank 201 of water level to be detected, optionally, first
Bleeder circuit 41 includes first resistor R1, and one end of first resistor R1 is connect with the output end of first switch circuit 20, the first electricity
The other end of resistance R1 is connect with a test lead Water_L1, the first electrode J1 of controller 10 respectively, specifically, first resistor R1
One end connect with the output terminals A 1 of the first analog switch chip SW1, the other end of first resistor R1 respectively with controller 10
One test lead Water_L1, first electrode J1 connection, wherein a test lead Water_L1 and first electrode circuit for controller 10
The node of 40 connections is test point D, and controller 10 obtains the information of voltage of test point D by test lead SwitchA.Further
, reference mode C is additionally provided between first resistor R1 and first switch circuit 20.
Reference electrode circuit 50 is connect with the output end of second switch circuit 30, and further, reference electrode circuit 50 wraps
Reference electrode J0 is included, reference electrode J0 is connect with the output end of second switch circuit 30；Specifically, reference electrode J0 and the second mould
The output terminals A 2 of quasi- switch chip SW2 connects, wherein is provided with reference mode F, reference mode F is located at reference electrode J0 and the
Between the output terminals A 2 of two analog switch chip SW2.
Wherein, controller 10 selects conducting first switch circuit 20 and second switch circuit 30 for exporting low and high level
In a certain channel, and then realizing in water level detection circuit 100 by the DC conversion of DC power supply VDD is alternating current and to mention
First electrode circuit 40 and reference electrode circuit 50 are supplied, first electrode circuit 40 and reference electrode circuit 50 are set to tested
It surveys in the water storage tank 201 of water level, controller 10 is also used to be determined in water storage tank 201 according to the information of voltage of test lead acquisition
Water level information, water level information include the depth of water degree etc. in water storage tank 201.Optionally, controller includes single-chip microcontroller, for example,
Controller is ABOV MC80F0708 single-chip microcontroller.Specifically, the first analog switch chip SW1 and the second analog switch chip SW2
It is single pole double throw analog switch, as a result, when the (control of the first analog switch chip SW1 of the control terminal of first switch circuit 20
End S1) when receiving high level, an input terminal (an input terminal B1 of the first analog switch chip SW1) for first switch circuit 20
It is connect with the output end (output terminals A 1 of the first analog switch chip SW1) of first switch circuit 20, to make DC power supply VDD
It is connected to first electrode circuit 40；When the control terminal (the control terminal S1 of the first analog switch chip SW1) of first switch circuit 20
When receiving low level, another input terminal (another input terminal B2 of the first analog switch chip SW1) of first switch circuit 20
It is connect with the output end (output terminals A 1 of the first analog switch chip SW1) of first switch circuit 20, to keep first electrode electric
Road 40 is grounded；When the control terminal (the control terminal S2 of the second analog switch chip SW2) of second switch circuit 30 receives low level
When, the input terminal (an input terminal B3 of the second analog switch chip SW1) and second switch circuit 30 of second switch circuit 30
Output end (output terminals A 2 of the second analog switch chip SW2) connection, to make DC power supply VDD and reference electrode circuit 50
Connection；When the control terminal (the control terminal S2 of the second analog switch chip SW2) of second switch circuit 30 receives high level, the
Another input terminal (another input terminal B4 of the second analog switch chip SW2) of two switching circuits 30 and second switch circuit 30
Output end (output terminals A 2 of the second analog switch chip SW2) connection, so that reference electrode circuit 50 be made to be grounded.As a result, at this
In utility model embodiment, controller 10 only need to control first switch circuit 20 and second switch by output low and high level
On off operating mode in circuit 30, and then realize that by the DC conversion of DC power supply VDD be exchange in water level detection circuit 100
Electricity is simultaneously supplied to first electrode circuit 40 and reference electrode circuit 50, so, it avoids direct current water level detecting in the prior art and leads
The problem of sending a telegraph pole galvanic corrosion, while also solving the problems, such as that exchanging water level detecting in the prior art circuit complexity, at high cost, letter occurs
Circuit structure is changed, has reduced costs.
In some embodiments, more water level informations be can detecte in order to realize, therefore, meeting in water level detection circuit 100
Multiple electrodes are provided with, further, water level detection circuit 100 further includes second electrode circuit 60, and second electrode circuit 60 divides
It is not connect with another test lead of the output end of first switch circuit 20, controller 10, controller 10 is used to be tested according to two
The information of voltage obtained is held to determine water level information.Optionally, second electrode circuit 60 includes the second bleeder circuit 61 and second
Electrode J2, one end of the second bleeder circuit 61 are connect with the output end of first switch circuit 20, the second bleeder circuit 61 it is another
End is connect with another test lead Water_L2, the second electrode J2 of controller 10 respectively, and second electrode J2 is placed in be detected
In the water storage tank 201 of water level.Optionally, the second bleeder circuit 61 includes second resistance R2, one end of second resistance R2 and first
The output end of switching circuit 20 connects, the other end of second resistance R2 respectively with another test lead Water_L2 of controller 10,
Second electrode J2 connection.Wherein, the node that another test lead Water_L2 of controller 10 is connect with second electrode circuit 60 is
Test point E, controller 10 obtain the information of voltage of test point E by test lead SwitchB.Further opened specifically, working as first
When the control terminal (the control terminal S1 of the first analog switch chip SW1) on powered-down road 20 receives high level, first switch circuit 20
An input terminal (an input terminal B1 of the first analog switch chip SW1) and first switch circuit 20 output end (first simulation
The output terminals A 1 of switch chip SW1) connection, thus make DC power supply VDD respectively with first electrode circuit 40, second electrode circuit
60 connections；When the control terminal (the control terminal S1 of the first analog switch chip SW1) of first switch circuit 20 receives low level,
Another input terminal (another input terminal B2 of the first analog switch chip SW1) and first switch circuit 20 of first switch circuit 20
Output end (output terminals A 1 of the first analog switch chip SW1) connection, thus make first electrode circuit 40 and second electrode electricity
Road 60 is grounded；When the control terminal (the control terminal S2 of the second analog switch chip SW2) of second switch circuit 30 receives low electricity
Usually, an input terminal (an input terminal B3 of the second analog switch chip SW1) for second switch circuit 30 and second switch circuit
30 output end (output terminals A 2 of the second analog switch chip SW2) connection, to make DC power supply VDD and reference electrode circuit
50 connections；When the control terminal (the control terminal S2 of the second analog switch chip SW2) of second switch circuit 30 receives high level,
Another input terminal (another input terminal B4 of the second analog switch chip SW2) and second switch circuit 30 of second switch circuit 30
Output end (output terminals A 2 of the second analog switch chip SW2) connection, thus make reference electrode circuit 50 be grounded.
In order to better illustrate the technical solution of the utility model, the realization process of the utility model is done further below
Elaboration:
In the utility model embodiment, controller 10 may include existing single-chip microcontroller etc., such as ABOV MC80F0708
Single-chip microcontroller etc., one output end SwitchA and another output end SwitchB can rule output low and high level, further,
An output end SwitchA and another output end SwitchB for controller 10 exports high level or low level, and height electricity simultaneously
Flat to repeat to export, i.e. an output end SwitchA and another output end SwitchB for controller 10 exports high level simultaneously and exists later
Low level is exported simultaneously, and is moved in circles.Detailed process is as follows the first situation and second situation:
The first situation: when the output end SwitchA and another output end SwitchB of controller 10 export high electricity simultaneously
When flat 1, the input terminal (an input terminal B1 of the first analog switch chip SW1) and first switch circuit of first switch circuit 20
20 output end (output terminals A 1 of the first analog switch chip SW1) connection, to make DC power supply VDD and first electrode circuit
40 connections, meanwhile, another input terminal (another input terminal B4 of the second analog switch chip SW2) of second switch circuit 30 and the
The output end (output terminals A 2 of the second analog switch chip SW2) of two switching circuits 30 connects, to make reference electrode circuit 50
Ground connection.One end of first resistor R1 and one end of second resistance R2 are connected to DC power supply VDD as a result, i.e. reference mode C's
Voltage is equal to the voltage value of DC power supply VDD, and reference electrode J0 is directly grounded, i.e., the voltage of reference mode F is equal to 0, at this time
Current direction successively passes through: an input terminal B1, the first analog switch chip of DC power supply VDD, the first analog switch chip SW1
The output terminals A 1 of SW1, reference mode C, first resistor R1 (or, first resistor R1 and second resistance R2), test point D are (or, test
Point D and test point E), first electrode J1 (or, first electrode J1 and second electrode J2), water or other liquid, reference electrode J0,
Reference mode F, the output terminals A 2 of the second analog switch chip SW2, the second analog switch chip SW2 another input terminal B4, connect
Ground GND；When this state, the voltage value on test point D and test point E is greater than the voltage value of reference mode F, test point D and reference
Voltage value between node F is greater than zero, and the voltage value between test point E and reference mode F is applied to first electrode also greater than zero
Voltage between J1 and reference electrode J0 is forward voltage, and the voltage being applied between second electrode J2 and reference electrode J0 is also
Forward voltage.
Second situation: when the output end SwitchA and another output end SwitchB of controller 10 export low electricity simultaneously
When flat 0, another input terminal (another input terminal B2 of the first analog switch chip SW1) and first switch of first switch circuit 20
The output end (output terminals A 1 of the first analog switch chip SW1) of circuit 20 connects, to make first electrode circuit 40 be grounded, together
When, the input terminal (an input terminal B3 of the second analog switch chip SW1) and second switch circuit 30 of second switch circuit 30
Output end (output terminals A 2 of the second analog switch chip SW2) connection, to make DC power supply VDD and reference electrode circuit 50
Connection.One end of first resistor R1 and one end of second resistance R2 are grounded as a result, i.e., the voltage of reference mode C be equal to 0, and
Reference electrode J0 is connected directly to DC power supply VDD, i.e. voltage value of the voltage of reference mode F equal to DC power supply VDD, at this time
Current direction successively passes through: an input terminal B3, the second analog switch chip of DC power supply VDD, the second analog switch chip SW1
Output terminals A 2, reference mode F, reference electrode J0, water or other liquid of SW2, first electrode J1 are (or, first electrode J1 and
Two electrode J2), test point D (or, test point D and test point E), first resistor R1 (or, first resistor R1 and second resistance R2),
Reference mode C, the output terminals A 1 of the first analog switch chip SW1, the first analog switch chip SW1 another input terminal B2, connect
Ground GND；When this state, the voltage value on test point D and test point E is less than the voltage value of reference mode F, is applied to first electrode
Voltage between J1 and reference electrode J0 is negative voltage, and the voltage being applied between second electrode J2 and reference electrode J0 is also
Negative voltage.
As a result, 10 need of controller simply control one output end SwitchA and another output end SwitchB can rule
Output low and high level can be realized and make to be applied to voltage between first electrode J1 and reference electrode J0 in forward voltage and negative
Converted between voltage, and realize make the voltage that is applied between second electrode J2 and reference electrode J0 also in forward voltage and
It is converted between negative voltage.To realize the equivalent electricity that DC power supply VDD is switched to alternating voltage in water level detection circuit 100
Pressure, further, when first electrode J1 (or, first electrode J1 and second electrode J2) and reference electrode J0 be all immersed in water or
When in other liquid, since water or other liquid have certain electric conductivity, first electrode J1 is (or, first electrode J1 and the
Two electrode J2) and reference electrode J0 between water perhaps other liquid by it is equivalent in resistance when first electrode J1 or second electricity
Pole J2 not with water contact when, first electrode J1 or second electrode J2 are equivalent to open circuit between reference electrode J0 respectively, i.e., between
Resistance value be infinity.It is worth noting that: in the utility model embodiment, first electrode J1, second electrode J2 and
The position that reference electrode J0 is arranged in water storage tank 201 is different, respectively represents different water level informations, wherein reference electrode
The water level position of J0 setting is minimum, and the water level position of followed by first electrode J1 setting is placed in the middle, is finally second electrode J2 setting
Water level position highest.As a result, when water level difference, the Riddled Condition of first electrode J1, second electrode J2 and reference electrode J0 are all
It is not quite similar, the voltage letter that a test lead Water_L1 and another test lead Water_L2 for controller 10 is obtained as a result,
Breath is also different, and current water level information can be known according to these information of voltage, and it is true in turn to obtain information of voltage by controller
Determining water level information is also means commonly used in the prior art, be will not repeat them here.
In the utility model embodiment, controller 10 only need to control first switch circuit by output low and high level
20 and second switch circuit 30 on off operating mode, and then realize in water level detection circuit 100 by the direct current of DC power supply VDD
Electrotransformation is alternating current and is supplied to first electrode circuit 40, second electrode circuit 60 and reference electrode circuit 50, so, it avoids
The problem of direct current water level detecting leads to electrode galvanic corrosion in the prior art, while also solving to exchange in water level detecting in the prior art
Need caused by the complicated circuit constructions such as AC power source, ac amplifier circuit that circuit is complicated, problem at high cost, this is practical new
The component that type embodiment uses is few, simplifies circuit structure, reduces costs, and reduces power consumption, furthermore, it is possible to according to reality
Border experimental data adjusts the output frequency of controller 10 to adjust the working frequency of electric current in entire water level detection circuit 100, more
Add conveniently.
Another technical solution that the utility model embodiment uses is: providing a kind of water storage apparatus 200, comprising: such as
The upper water level detection circuit 100, water storage tank 201, first electrode J1, second electrode J2 in water level detection circuit and with reference to electricity
Pole J0 is all set in water storage tank 201.Optionally, first electrode J1, second electrode J2 and reference electrode J0 are set to water storage tank
At different water levels in 201.Respectively representing different water level informations, wherein the water level position of reference electrode J0 setting is minimum,
Secondary is that the water level position that first electrode J1 is arranged is placed in the middle, is finally the water level position highest of second electrode J2 setting.Work as water storage tank
When water level difference in 201, the information of voltage that controller 10 obtains also will be different, it is possible thereby to determine current level information.
The foregoing is merely the embodiments of the present invention, and therefore it does not limit the scope of the patent of the utility model, all
It is equivalent structure or equivalent flow shift made based on the specification and figures of the utility model, directly or indirectly uses
In other related technical areas, it is also included in the patent protection scope of the utility model.
Claims (10)
1. a kind of water level detection circuit characterized by comprising
Controller；
First switch circuit, one input end are connect with DC power supply, another input end grounding of the first switch circuit, institute
The control terminal for stating first switch circuit is connect with a control terminal of the controller；
Second switch circuit, one input end are connect with the DC power supply, another input termination of the second switch circuit
Ground, the control terminal of the second switch circuit are connect with another control terminal of the controller；
First electrode circuit is connect with a test lead of the output end of the first switch circuit, the controller respectively；
Reference electrode circuit is connect with the output end of the second switch circuit；
Wherein, the controller selects to be connected the first switch circuit and second switch electricity for exporting low and high level
A certain channel in road, the first electrode circuit and the reference electrode circuit are set to water level to be detected when in use
In water storage tank, the controller is also used to determine the water level in the water storage tank according to the information of voltage of test lead acquisition
Information.
2. water level detection circuit according to claim 1, which is characterized in that
The first switch circuit includes the first analog switch chip, and the second switch circuit includes the second analog switch core
Piece, first analog switch chip and second analog switch chip are single pole double throw analog switch；
Wherein, when the control terminal of the first switch circuit receives high level, an input terminal of the first switch circuit
It is connect with the output end of the first switch circuit, to make the DC power supply and the first electrode circuit communication；Work as institute
When stating the control terminal of first switch circuit and receiving low level, another input terminal of the first switch circuit is opened with described first
The output end on powered-down road connects, to make the first electrode circuit ground；When the control terminal of the second switch circuit receives
When to low level, an input terminal of the second switch circuit is connect with the output end of the second switch circuit, to make institute
State DC power supply and the reference electrode circuit communication；When the control terminal of the second switch circuit receives high level, institute
Another input terminal for stating second switch circuit is connect with the output end of the second switch circuit, to make the reference electrode electricity
Road ground connection.
3. water level detection circuit according to claim 2, which is characterized in that the water level detection circuit further include:
Second electrode circuit is connect with another test lead of the output end of the first switch circuit, the controller respectively,
The controller is used to determine water level information according to the information of voltage of two test leads acquisitions.
4. water level detection circuit according to claim 3, which is characterized in that
The first electrode circuit includes the first bleeder circuit and first electrode, one end of first bleeder circuit and described the
The output end of one switching circuit connects, the other end of first bleeder circuit respectively with a test lead of the controller, institute
First electrode connection is stated, the first electrode is placed in the water storage tank of water level to be detected.
5. water level detection circuit according to claim 4, which is characterized in that
First bleeder circuit includes first resistor, the output end of one end of the first resistor and the first switch circuit
Connection, the other end of the first resistor are connect with a test lead of the controller, the first electrode respectively.
6. water level detection circuit according to claim 4, which is characterized in that
The second electrode circuit includes the second bleeder circuit and second electrode, one end of second bleeder circuit and described the
The output end of one switching circuit connects, the other end of second bleeder circuit respectively with another test lead of the controller,
The second electrode connection, the second electrode are placed in the water storage tank of the water level to be detected.
7. water level detection circuit according to claim 6, which is characterized in that
Second bleeder circuit includes second resistance, the output end of one end of the second resistance and the first switch circuit
Connection, the other end of the second resistance are connect with the another test lead of the controller, the second electrode respectively.
8. water level detection circuit according to claim 6, which is characterized in that
The reference electrode circuit includes reference electrode, and the reference electrode is connect with the output end of the second switch circuit.
9. a kind of water storage apparatus characterized by comprising
Such as the described in any item water level detection circuits of claim 1-8,
Water storage tank, first electrode, second electrode and reference electrode in the water level detection circuit are all set in the water storage tank
It is interior.
10. water storage apparatus according to claim 9, which is characterized in that
The first electrode, the second electrode and the reference electrode are set at the different water levels in the water storage tank.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821472409.3U CN209014089U (en) | 2018-09-07 | 2018-09-07 | A kind of water level detection circuit and water storage apparatus |
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| CN201821472409.3U CN209014089U (en) | 2018-09-07 | 2018-09-07 | A kind of water level detection circuit and water storage apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110346013A (en) * | 2019-08-16 | 2019-10-18 | 重庆中控欧玛仪表研究院有限公司 | Vault pours liquid level detection system |
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2018
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110346013A (en) * | 2019-08-16 | 2019-10-18 | 重庆中控欧玛仪表研究院有限公司 | Vault pours liquid level detection system |
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