CN106441501B - A kind of water flooding detecting circuit - Google Patents
A kind of water flooding detecting circuit Download PDFInfo
- Publication number
- CN106441501B CN106441501B CN201610801211.4A CN201610801211A CN106441501B CN 106441501 B CN106441501 B CN 106441501B CN 201610801211 A CN201610801211 A CN 201610801211A CN 106441501 B CN106441501 B CN 106441501B
- Authority
- CN
- China
- Prior art keywords
- triode
- connection
- resistor
- base stage
- resistance
- 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.)
- Active
Links
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
- G01F23/24—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 variations of resistance of resistors due to contact with conductor fluid
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The present invention provides a kind of water flooding detecting circuit, and the water flooding detecting circuit includes the first triode P1, the second triode P2, third transistor P3, the 4th triode P4, the first biasing resistor Rb1, the second biasing resistor Rb2With pull down resistor R0, the first collection terminal J1, the second collection terminal J2, first input end I1, the second input terminal I2And output end O1.For the water flooding detecting circuit using components such as basic resistance, triodes, water is triggered using the resistance of water expires signal, expires signal with single-chip microcontroller acquisition water, and trigger alarm signal.The water flooding detecting circuit being connected with cut-off so that generating the electric current of direction change in water under unlike signal using triode, effectively solve influence of the electrolysis of water to detection signal, ensure the stability of signal, the reliability of testing result, so that the normal operation and service life of equipment be effectively ensured.
Description
Technical field
The present invention relates to automatic control technology field more particularly to water flooding detecting technical fields.
Background technique
Water flooding detecting function requires to use such as washing machine, dish-washing machine, water heater, heating stove man in many household electrical appliances
Electrical appliance.Current water flooding detecting scheme is roughly divided into two kinds: one is the methods using physics, place one in water and float
Son, when water is full, the position of float is floated, and microswitch is triggered, and obtaining water expires signal；Another kind is directly detected using circuit
Water by detecting the resistance of water, obtains certain voltage signal also with the electric conductivity of water, or using water resistance and
Capacitor in circuit generates oscillation, to detect frequency signal.
Detect the full scheme of water in the way of this physics of switch, have the shortcomings that obvious: a period of time cost is very
Height, second is that service life is not grown.It is chronically in moist environment due to switching, the contact surface of switch can gradually be corroded,
Attachment gradually increases, and it is bad to finally result in switch contact, and then can not detect water and expire signal or false triggering signal, therefore needs
Periodically to change switch.
Another kind expires the scheme of signal using the resistance detection water of water, can not also solve the problems, such as water electrolysis.Due to household
In the circuit system of electric appliance, it is necessary to be powered using DC power supply to single-chip microcontroller and other controls, detection part, institute
With when detecting water completely, adding the voltage on two electrodes in water is DC voltage.Any water quality has certain conduction
Property, in water plus when DC voltage, water can be allowed to generate electrolysis, in cathode by reductive water formation hydrogen, pass through oxidation in anode
Water forms oxygen.Therefore, come when detecting water, due to the electrolysis of water quality, the content of water is fewer and fewer in the way of direct current, but
It is that electrolyte in water is constant, so the resistance of water reduces as time increases, while the electrolytic speed of water is increasingly
Fastly；So as to cause the water detected resistance be changing value so that the water detected expire signal can be more and more unstable.
Summary of the invention
Present invention seek to address that problem as described above.It is an object of the present invention to provide in a kind of solution problem above
Any one water flooding detecting circuit.Specifically, the present invention provides the water flooding detecting circuit that can effectively avoid water electrolysis.
According to the first aspect of the invention, the present invention provides a kind of water flooding detecting circuit, the water flooding detecting circuit packets
Include the first triode P1, the second triode P2, third transistor P3, the 4th triode P4, the first biasing resistor Rb1, second biasing
Resistance Rb2With pull down resistor R0, the first collection terminal J1, the second collection terminal J2, first input end I1, the second input terminal I2And output
Hold O1；
Wherein, the first triode P1Base stage and the first input end I1Connection, the first triode P1Hair
The anode of emitter-base bandgap grading and power supply connects, and the first triode P1Base stage and the first triode P1Emitter between lead to
Cross the first biasing resistor Rb1Connection, the first triode P1Collector and the first collection terminal J1Connection；
The second triode P2Base stage and the second input terminal I2Connection, the second triode P2Emitter
It is connect with the anode of power supply, and the second triode P2Base stage and the second triode P2Emitter between pass through institute
State the second biasing resistor Rb2Connection, the second triode P2Collector and the second collection terminal J2Connection；
The third transistor P3Base stage and power supply anode connect, and with the first input end I1Connection；Described
Three triode P3Emitter and the second collection terminal J2Connection, the third transistor P3Collector and the drop-down it is electric
Hinder R0First end connection, the pull down resistor R0Second end ground connection；
The 4th triode P4Base stage and power supply anode connect, and with the second input terminal I2Connection；Described
Four triode P4Emitter and the first collection terminal J1Connection, the 4th triode P4Collector and the drop-down it is electric
Hinder R0First end connection；The pull down resistor R0First end and the output end O1Connection.
Wherein, the water flooding detecting circuit further includes filter circuit 10, and the filter circuit 10 includes load resistance RCWith
Capacitor C, wherein the load resistance RCFirst end and the pull down resistor R0First end connection, the load resistance RC's
Second end and the first end of the capacitor C with the output end O1Connection, the second end ground connection of the capacitor C.
Wherein, the water flooding detecting circuit further includes first resistor R1, second resistance R2, 3rd resistor R3And the 4th electricity
Hinder R4, wherein the first triode P1Base stage and the first resistor R1First end connection, the third transistor P3
Base stage and the 3rd resistor R3First end connection, the 3rd resistor R3Second end and the first resistor R1?
Two ends with the first input end I1Connection；The second triode P2Base stage and the second resistance R2First end connect
It connects, the 4th triode P4Base stage and the 4th resistance R4First end connection, the 4th resistance R4Second end and
The second resistance R2Second end with the second input terminal I2Connection.
Wherein, the water flooding detecting circuit further includes the first pull-up resistor RX1With the second pull-up resistor RX2, wherein it is described
Third transistor P3Base stage pass through the first pull-up resistor RX1It is connect with the anode of power supply, the 4th triode P4Base
Pole passes through the second pull-up resistor RX2It is connect with the anode of power supply.
According to another aspect of the present invention, the present invention also provides a kind of water flooding detecting circuit, the water flooding detecting circuits
Including single-chip microcontroller, the first detecting electrode, the second detecting electrode, the first triode P1, the second triode P2, third transistor P3,
Four triode P4, the first biasing resistor Rb1, the second biasing resistor Rb2And pull down resistor R0；Wherein,
The first triode P1Base stage and the single-chip microcontroller the first output end OUT1Connection, first triode
P1Emitter and the anode of power supply connect, and the first triode P1Base stage and the first triode P1Emitter
Between pass through the first biasing resistor Rb1Connection, the first triode P1Collector and first detecting electrode connect
It connects；
The second triode P2Base stage and the single-chip microcontroller second output terminal OUT2Connection, second triode
P2Emitter and the anode of power supply connect, and the second triode P2Base stage and the second triode P2Emitter
Between pass through the second biasing resistor Rb2Connection, the second triode P2Collector and second detecting electrode connect
It connects；
The third transistor P3Base stage and the anode of power supply connect, and the first output end OUT with the single-chip microcontroller1
Connection；The third transistor P3Emitter connect with second detecting electrode, the third transistor P3Collector with
The pull down resistor R0First end connection, the pull down resistor R0Second end ground connection；The 4th triode P4Base stage with
The anode connection of power supply, and the second output terminal OUT with the single-chip microcontroller2Connection；
The 4th triode P4Emitter connect with first detecting electrode, the 4th triode P4Current collection
Pole and the pull down resistor R0First end connection；The pull down resistor R0First end and the single-chip microcontroller input terminal In connect
It connects；
The single-chip microcontroller carries out analog-to-digital conversion for generating adjustable rectangular wave, and to testing result to obtain water level detecting
As a result.
Wherein, the first output end OUT of the single-chip microcontroller1Export 1 signal of the first pulse width modulation (PWM), the monolithic
The second output terminal OUT of machine22 signal of the second pulse width modulation (PWM) is exported, the PWM1 signal is complementary with the PWM2 signal
And symmetrical dead zone is had, the symmetrical dead zone occurs when the PWM1 signal and the PWM2 signal are high level；
Within every half of pulse period, the single-chip microcontroller 20 carries out multi collect；In the symmetrical dead time, monolithic
Machine is acquired without data.
Wherein, the water flooding detecting circuit further includes filter circuit, and the filter circuit includes load resistance RCAnd capacitor
C, wherein the load resistance RCFirst end and the pull down resistor R0First end connection, the load resistance RCSecond
The first end of end and the capacitor C are connect with the input terminal In of the single-chip microcontroller, the second end ground connection of the capacitor C.
Wherein, the water flooding detecting circuit further includes first resistor R1, second resistance R2, 3rd resistor R3And the 4th electricity
Hinder R4, wherein the first triode P1Base stage and the first resistor R1First end connection, the third transistor P3
Base stage and the 3rd resistor R3First end connection, the 3rd resistor R3Second end and the first resistor R1?
Two ends with the first output end OUT of the single-chip microcontroller1Connection；
The second triode P2Base stage and the second resistance R2First end connection, the 4th triode P4's
Base stage and the 4th resistance R4First end connection, the 4th resistance R4Second end and the second resistance R2's
Second end with the second output terminal OUT of the single-chip microcontroller2Connection.
Wherein, the water flooding detecting circuit further includes the first pull-up resistor RX1With the second pull-up resistor RX2, wherein it is described
Third transistor P3Base stage pass through the first pull-up resistor RX1It is connect with the anode of power supply, the 4th triode P4Base
Pole passes through the second pull-up resistor RX2It is connect with the anode of power supply.
Wherein, the water flooding detecting circuit further includes alarm module, and the alarm module includes sound module and/or display
The third output end OUT of module, the sound module and/or the display module and the single-chip microcontroller3Connection.
Provided water flooding detecting circuit utilizes water using components such as basic resistance, triodes according to the present invention
Resistance expires signal to trigger water, expires signal with single-chip microcontroller acquisition water, and trigger alarm signal.The water flooding detecting circuit utilizes three poles
With cut-off so that generating the electric current of direction change in water, detection is believed in the electrolysis for effectively solving water for conducting of the pipe under unlike signal
Number influence, it is ensured that stability, the reliability of testing result of signal, so that the normal operation of equipment be effectively ensured and using the longevity
Life.
Being described below for exemplary embodiment is read with reference to the drawings, other property features of the invention and advantage will
It is apparent from.
Detailed description of the invention
It is incorporated into specification and the attached drawing for constituting part of specification shows the embodiment of the present invention, and with
Principle for explaining the present invention together is described.In the drawings, similar appended drawing reference is for indicating similar element.Under
Attached drawing in the description of face is some embodiments of the present invention, rather than whole embodiments.Those of ordinary skill in the art are come
It says, without creative efforts, other drawings may be obtained according to these drawings without any creative labor.
Fig. 1 schematically illustrates a kind of structural schematic diagram of embodiment of water flooding detecting circuit according to the present invention；
Fig. 2 schematically illustrates the structural schematic diagram of another embodiment of water flooding detecting circuit according to the present invention；
Fig. 3 schematically illustrates the signal output waveform figure of single-chip microcontroller in embodiment illustrated in fig. 2.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.It needs
Illustrate, in the absence of conflict, the features in the embodiments and the embodiments of the present application can mutual any combination.
The present invention carries out circuit layout using on and off of the triode under unlike signal, and by being passed through two-way
Complementary pulse width modulating signal effectively avoids so that two electrodes in water are used alternately as positive or negative pole in electricity
Stream acts on the generation for being lauched Electrolysis, so that it is guaranteed that the stability and reliability of detection signal, guarantee the normal operation of equipment.
With reference to the accompanying drawing, provided water flooding detecting circuit according to the present invention is described in detail.
Fig. 1 shows a kind of a kind of electrical block diagram of embodiment of water flooding detecting circuit according to the present invention.Ginseng
According to shown in Fig. 1, which includes the first triode P1, the second triode P2, third transistor P3, the 4th triode
P4, the first biasing resistor Rb1, the second biasing resistor Rb2With pull down resistor R0, the first collection terminal J1, the second collection terminal J2, it is first defeated
Enter to hold I1, the second input terminal I2And output end O1。
Specifically, the first triode P1Base stage and first input end I1Connection, the first triode P1Emitter and power supply
Anode connection, and the first triode P1Base stage and the first triode P1Emitter between pass through the first biasing resistor Rb1Even
It connects, the first triode P1Collector and the first collection terminal J1Connection；
Second triode P2Base stage and the second input terminal I2Connection, the second triode P2Emitter and power supply anode
Connection, and the second triode P2Base stage and the second triode P2Emitter between pass through the second biasing resistor Rb2Connection, the
Two triode P2Collector and the second collection terminal J2Connection；
Third transistor P3Base stage and power supply anode connect, and with first input end I1Connection；Third transistor P3's
Emitter and the second collection terminal J2Connection, third transistor P3Collector and pull down resistor R0First end connection, pull down resistor
R0Second end ground connection；
4th triode P4Base stage and power supply anode connect, and with the second input terminal I2Connection；4th triode P4's
Emitter and the first collection terminal J1Connection, the 4th triode P4Collector and pull down resistor R0First end connection；
Pull down resistor R0First end and output end O1Connection.When water level changes, the resistance that water provides becomes
Change, the electric current in water changes therewith, pull down resistor R0The voltage at both ends also changes, and therefore, can pass through detection drop-down electricity
Hinder R0The voltage change at both ends judges the height of water level.
When carrying out water using the water flooding detecting circuit expires signal detection, by the first collection terminal J1With the second collection terminal J2Respectively connect
The electrode in the water that one is put into measurement equipment to be checked is connect, and in first input end I1With the second input terminal I2Input two-way is mutual respectively
The pulse width modulating signal of benefit, so that the first collection terminal J1With the second collection terminal J2Alternately become positive or negative pole, the one or three pole
Pipe P1With third transistor P3Or the second triode P2With the 4th triode P4It is connected in turn two-by-two, effectively avoids unidirectionally being powered
Caused by water electrolysis testing result bring is influenced, and the variation of water causes the change in resistance of water in detection process, this
Variation eventually leads to pull down resistor R0The voltage change at both ends therefore can be by detecting pull down resistor R0The voltage value at both ends comes
Monitor SEA LEVEL VARIATION situation.
Further, the pull down resistor R to ensure to detect0The stabilization of both end voltage value has avoided interference signal influence
Testing result, the water flooding detecting circuit further include filter circuit 10.The filter circuit 10 can be realized filtering function to be any
The circuit form of energy, for example, in the present embodiment, filter circuit 10 includes load resistance RCWith capacitor C, wherein load resistance RC
First end and pull down resistor R0First end connection, load resistance RCSecond end and capacitor C first end with output end O1
Connection, the second end ground connection of capacitor C.
Specifically, which further includes first resistor R1, second resistance R2, 3rd resistor R3And the 4th electricity
Hinder R4, wherein the first triode P1Base stage and first resistor R1First end connection, third transistor P3Base stage and third
Resistance R3First end connection, 3rd resistor R3Second end and first resistor R1Second end with first input end I1Connection；
Second triode P2Base stage and second resistance R2First end connection, the 4th triode P4Base stage and the 4th resistance R4?
One end connection, the 4th resistance R4Second end and second resistance R2Second end with the second input terminal I2Connection.
In addition, in order to which guarantee triode is additionally provided with pull-up resistor using safe, of the invention water flooding detecting circuit.Such as
In embodiment shown in FIG. 1, which further includes the first pull-up resistor RX1With the second pull-up resistor RX2, wherein the
Three triode P3Base stage pass through the first pull-up resistor RX1It is connect with the anode of power supply, the 4th triode P4Base stage pass through second
Pull-up resistor RX2It is connect with the anode of power supply.
Fig. 2 shows the structural schematic diagrams of another embodiment of water flooding detecting circuit according to the present invention.Referring to Fig. 2 institute
Show, which includes single-chip microcontroller 20, the first detecting electrode 31, the second detecting electrode 32, the first triode P1, second
Triode P2, third transistor P3, the 4th triode P4, the first biasing resistor Rb1, the second biasing resistor Rb2And pull down resistor
R0.Single-chip microcontroller 20 is used to generate the adjustable rectangular wave of certain frequency and duty ratio, and to testing result carry out analog-to-digital conversion with
Obtain water level detecting result.
Wherein, the first triode P1Base stage and single-chip microcontroller 20 the first output end OUT1Connection, the first triode P1Hair
The anode of emitter-base bandgap grading and power supply connects, and the first triode P1Base stage and the first triode P1Emitter between by first partially
Set resistance Rb1Connection, the first triode P1Collector connect with the first detecting electrode 31；
Second triode P2Base stage and single-chip microcontroller 20 second output terminal OUT2Connection, the second triode P2Emitter
It is connect with the anode of power supply, and the second triode P2Base stage and the second triode P2Emitter between pass through the second biased electrical
Hinder Rb2Connection, the second triode P2Collector connect with the second detecting electrode 32；
Third transistor P3Base stage and the anode of power supply connect, and the first output end OUT with single-chip microcontroller 201Connection；The
Three triode P3Emitter connect with the second detecting electrode 32, third transistor P3Collector and pull down resistor R0First
End connection, pull down resistor R0Second end ground connection；
4th triode P4Base stage and the anode of power supply connect, and the second output terminal OUT with single-chip microcontroller 202Connection；The
Four triode P4Emitter connect with the first detecting electrode 31, the 4th triode P4Collector and pull down resistor R0First
End connection；
Pull down resistor R0First end connect with the input terminal In of single-chip microcontroller 20, the pull down resistor R that will test0Both ends
Voltage value feed back to single-chip microcontroller 20 carry out analog-to-digital conversion after, differentiate SEA LEVEL VARIATION situation.
Fig. 3 shows a kind of waveform diagram of embodiment of the output signal of single-chip microcontroller 20.Specifically, the first of single-chip microcontroller 20
Output end OUT1Export 1 signal of the first pulse width modulation (PWM), the second output terminal OUT of single-chip microcontroller 202It is wide to export the second pulse
Spend 2 signal of modulation (PWM).In order to make the first detecting electrode 31 and the second detecting electrode 32 alternately become anode and cathode, single-chip microcontroller
The PWM1 signal of 20 outputs needs duty ratio complementary and having the same with PWM2 signal；Meanwhile in order to ensure circuit effectively uses,
Component is protected, there is certain dead time in PWM1 signal and PWM2 signal, and be symmetrical dead zone, symmetrical dead zone occurs
When PWM1 signal and PWM2 signal are high level, to effectively prevent triode straight-through.For example, PWM1 signal and PWM2 signal
The low level duration is 100ms, and high level lasting time is 150ms, and such dead time can be set to 50ms,
That is, in the time of each 25ms in front and back, PWM2 signal all must be high level when PWM1 signal is in low level.Every
In half of pulse period, single-chip microcontroller 20 will do it multiple data acquisition, to be measured in real time to water level conditions；Believe in pulse
Number be in symmetrical dead time when, single-chip microcontroller 20 without data acquire.
When PWM1 signal is low level, PWM2 signal is high level, the first biasing resistor R1For the first triode P1It provides
Base current, electric current flow through P from positive pole1And R1To the OUT of single-chip microcontroller 201, the first triode P1Conducting；Similarly, R3For P3
Base current, third transistor P are provided3Conducting.At this point, the first triode P1With third transistor P3It is in the conductive state, second
Triode P2With the 4th triode P4Be in close state, electric current from power supply anode followed by the first triode P1, first inspection
Survey electrode 31, the second detecting electrode 32, third transistor P3With pull down resistor R0To ground.
When PWM1 signal is high level, PWM2 signal is low level, the second biasing resistor R2For the second triode P2It provides
Base current, electric current flow through P from positive pole2And R2To the OUT of single-chip microcontroller 202, the second triode P2Conducting；Similarly, R4For P4
Base current, the 4th triode P are provided4Conducting.At this point, the second triode P2With the 4th triode P4It is in the conductive state, first
Triode P1With third transistor P3Be in close state, electric current from power supply anode followed by the second triode P2, second inspection
Survey electrode 32, the first detecting electrode 31, the 4th triode P4With pull down resistor R0To ground.
By controlling the first triode P respectively1With third transistor P3It simultaneously turns on or the second triode P2With the 4th
Triode P4It simultaneously turns on, so that the electric current for flowing through water is primary every half of pulse period variation, effectively solves unidirectional current and make
Water electrolysis problem under.
Although in the first triode P1With third transistor P3It simultaneously turns on and the second triode P2With the 4th triode P4Together
When being connected, the current direction for flowing through water is changing, but in pull down resistor R0The voltage swing of upper formation is constant.R0On
Voltage signal filtered by filter circuit 10 after be delivered to single-chip microcontroller 20 and carry out analog-to-digital conversion, to determine whether water is full.Every
In half of pulse period, single-chip microcontroller 20 carries out multi collect；In dead time, single-chip microcontroller 20 is acquired without data.
Specifically, judge that water can completely be carried out using various ways.For example, when water is not expired, the first detecting electrode 31
It can not be connected between the second detecting electrode 32, at this time R0On voltage close to 0V, single-chip microcontroller can be determined that as " the less than shape of water
State "；When water is full, be connected between the first detecting electrode 31 and the second detecting electrode 32, with R0Partial pressure, in R0It is upper to generate certain electricity
Pressure value after single-chip microcontroller collects this value, is determined as " water expires state ".
For another example pull down resistor R can also be passed through0On pressure value situation of change differentiated: for example, the first detecting electrode
31 and second the fixed setting of detecting electrode 32 somewhere, R when preset water is full0On pressure value, single-chip microcontroller 20 by it is collected value with
The preset value is compared, and when reaching preset value, is determined as " water expires state ", when collected numerical value is less than preset value, is determined
For " water vacant state ".
Identical as embodiment shown in FIG. 1, which further includes filter circuit 10, and filter circuit 10 can be
RC filter circuit, including load resistance RCWith capacitor C.Wherein, load resistance RCFirst end and pull down resistor R0First end connect
It connects, load resistance RCSecond end and the first end of capacitor C connect with the input terminal In of single-chip microcontroller 20, the second end of capacitor C
Ground connection.
Similarly, which further includes first resistor R1, second resistance R2, 3rd resistor R3And the 4th electricity
Hinder R4, wherein the first triode P1Base stage and first resistor R1First end connection, third transistor P3Base stage and third
Resistance R3First end connection, 3rd resistor R3Second end and first resistor R1Second end it is defeated with the first of single-chip microcontroller 20
Outlet OUT1Connection；Second triode P2Base stage and second resistance R2First end connection, the 4th triode P4Base stage and the
Four resistance R4First end connection, the 4th resistance R4Second end and second resistance R2Second end with single-chip microcontroller 20 second
Output end OUT2Connection.
Further, water flooding detecting circuit can also include the first pull-up resistor RX1With the second pull-up resistor RX2, wherein
Third transistor P3Base stage pass through the first pull-up resistor RX1It is connect with the anode of power supply, the 4th triode P4Base stage pass through the
Two pull-up resistor RX2It is connect with the anode of power supply.
In the present embodiment, which further includes alarm module 40, the alarm module 40 and single-chip microcontroller 20
Third output end OUT3It is connected.Specifically, alarm module 40 may include sound module 41 and/or display module 42, sounding
The third output end OUT of module 41 and/or display module 42 and single-chip microcontroller 203Connection.Module 41, which occurs, can be alarm, example
Such as, it can be set to buzzer；Display module 42 can be set to light flash, display or LED number or text importing etc.
Form.The water flooding detecting circuit passes through detection pull down resistor R0The voltage value at both ends, when judging that water is full, single-chip microcontroller 20 is by alarm signal
Number it is delivered to alarm module 40, is alarmed in the form of sounding and/or light.
Furthermore it is also possible to be arranged the third output end OUT of single-chip microcontroller 203With opening for tested equipment or priming apparatus
Stop device is attached, and after detecting that water is full, can directly stop starting the tested equipment or priming apparatus.
Descriptions above can combine implementation individually or in various ways, and these variants all exist
Within protection scope of the present invention.
Those of ordinary skill in the art will appreciate that all or part of the steps in the above method can be instructed by program
Related hardware is completed, and described program can store in computer readable storage medium, such as read-only memory, disk or CD
Deng.Optionally, one or more integrated circuits also can be used to realize, accordingly in all or part of the steps of above-described embodiment
Ground, each module/unit in above-described embodiment can take the form of hardware realization, can also use the shape of software function module
Formula is realized.The present invention is not limited to the combinations of the hardware and software of any particular form.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment comprising a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence " including one ... ", it is not excluded that wrapping
Include in the process, method, article or equipment of the element that there is also other identical elements.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations.Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of water flooding detecting circuit, which is characterized in that the water flooding detecting circuit includes the first triode (P1), the two or three pole
Manage (P2), third transistor (P3), the 4th triode (P4), the first biasing resistor (Rb1), the second biasing resistor (Rb2) and drop-down
Resistance (R0), the first collection terminal (J1), the second collection terminal (J2), first input end (I1), the second input terminal (I2) and output end
(O1)；
Wherein, the first triode (P1) base stage and the first input end (I1) connection, the first triode (P1)
The anode of emitter and power supply connects, and the first triode (P1) base stage and the first triode (P1) emitter
Between pass through the first biasing resistor (Rb1) connection, the first triode (P1) collector and first collection terminal
(J1) connection；
Second triode (the P2) base stage and the second input terminal (I2) connection, the second triode (P2) transmitting
The anode of pole and power supply connects, and the second triode (P2) base stage and the second triode (P2) emitter between
Pass through the second biasing resistor (Rb2) connection, the second triode (P2) collector and the second collection terminal (J2) even
It connects；
Third transistor (the P3) base stage and power supply anode connect, and with the first input end (I1) connection；Described
Three triode (P3) emitter and the second collection terminal (J2) connection, the third transistor (P3) collector with it is described
Pull down resistor (R0) first end connection, the pull down resistor (R0) second end ground connection；
4th triode (the P4) base stage and power supply anode connect, and with the second input terminal (I2) connection；Described
Four triode (P4) emitter and the first collection terminal (J1) connection, the 4th triode (P4) collector with it is described
Pull down resistor (R0) first end connection；
Pull down resistor (the R0) first end and the output end (O1) connection.
2. water flooding detecting circuit as described in claim 1, which is characterized in that the water flooding detecting circuit further includes filter circuit
(10), the filter circuit (10) includes load resistance (RC) and capacitor (C), wherein the load resistance (RC) first end with
Pull down resistor (the R0) first end connection, the load resistance (RC) second end and the capacitor (C) first end with
Output end (the O1) connection, the second end ground connection of the capacitor (C).
3. water flooding detecting circuit as claimed in claim 1 or 2, which is characterized in that the water flooding detecting circuit further includes first
Resistance (R1), second resistance (R2), 3rd resistor (R3) and the 4th resistance (R4), wherein the first triode (P1) base
Pole and the first resistor (R1) first end connection, the third transistor (P3) base stage and the 3rd resistor (R3)
First end connection, the 3rd resistor (R3) second end and the first resistor (R1) second end with it is described first input
Hold (I1) connection；
Second triode (the P2) base stage and the second resistance (R2) first end connection, the 4th triode (P4)
Base stage and the 4th resistance (R4) first end connection, the 4th resistance (R4) second end and the second resistance
(R2) second end with the second input terminal (I2) connection.
4. water flooding detecting circuit as described in claim 1, which is characterized in that the water flooding detecting circuit further includes the first pull-up
Resistance (RX1) and the second pull-up resistor (RX2), wherein the third transistor (P3) base stage pass through first pull-up resistor
(RX1) connect with the anode of power supply, the 4th triode (P4) base stage pass through the second pull-up resistor (RX2) and power supply
Anode connection.
5. a kind of water flooding detecting circuit, which is characterized in that the water flooding detecting circuit includes single-chip microcontroller (20), the first detecting electrode
(31), the second detecting electrode (32), the first triode (P1), the second triode (P2), third transistor (P3), the 4th triode
(P4), the first biasing resistor (Rb1), the second biasing resistor (Rb2) and pull down resistor (R0), wherein
First triode (the P1) base stage and the single-chip microcontroller (20) the first output end (OUT1) connection, the described 1st
Pole pipe (P1) emitter and the anode of power supply connect, and the first triode (P1) base stage and first triode
(P1) emitter between pass through the first biasing resistor (Rb1) connection, the first triode (P1) collector with it is described
First detecting electrode (31) connection；
Second triode (the P2) base stage and the single-chip microcontroller (20) second output terminal (OUT2) connection, the described 2nd 3
Pole pipe (P2) emitter and the anode of power supply connect, and the second triode (P2) base stage and second triode
(P2) emitter between pass through the second biasing resistor (Rb2) connection, the second triode (P2) collector with it is described
Second detecting electrode (32) connection；
Third transistor (the P3) base stage and the anode of power supply connect, and the first output end with the single-chip microcontroller (20)
(OUT1) connection；Third transistor (the P3) emitter connect with second detecting electrode (32), the third transistor
(P3) collector and the pull down resistor (R0) first end connection, the pull down resistor (R0) second end ground connection；
4th triode (the P4) base stage and the anode of power supply connect, and the second output terminal with the single-chip microcontroller (20)
(OUT2) connection；4th triode (the P4) emitter connect with first detecting electrode (31), the 4th triode
(P4) collector and the pull down resistor (R0) first end connection；
Pull down resistor (the R0) first end connect with the input terminal (In) of the single-chip microcontroller (20)；
The single-chip microcontroller (20) carries out analog-to-digital conversion for generating adjustable rectangular wave, and to testing result to obtain water level detecting
As a result.
6. water flooding detecting circuit as claimed in claim 5, which is characterized in that the first output end of the single-chip microcontroller (20)
(OUT1) output 1 signal of the first pulse width modulation (PWM), the second output terminal (OUT of the single-chip microcontroller (20)2) the second arteries and veins of output
Width modulated PWM2 signal is rushed, the PWM1 signal is complementary with the PWM2 signal and has symmetrical dead zone, the symmetrical dead zone
Occur when the PWM1 signal and the PWM2 signal are high level；
Within every half of pulse period, the single-chip microcontroller (20) carries out multi collect；In the symmetrical dead time, single-chip microcontroller
(20) it is acquired without data.
7. water flooding detecting circuit as claimed in claim 5, which is characterized in that the water flooding detecting circuit further includes filter circuit
(10), the filter circuit (10) includes load resistance (RC) and capacitor (C), wherein the load resistance (RC) first end with
Pull down resistor (the R0) first end connection, the load resistance (RC) second end and the capacitor (C) first end with
The input terminal (In) of the single-chip microcontroller (20) connects, the second end ground connection of the capacitor (C).
8. water flooding detecting circuit as claimed in claim 5, which is characterized in that the water flooding detecting circuit further includes first resistor
(R1), second resistance (R2), 3rd resistor (R3) and the 4th resistance (R4), wherein the first triode (P1) base stage with
First resistor (the R1) first end connection, the third transistor (P3) base stage and the 3rd resistor (R3) first
End connection, the 3rd resistor (R3) second end and the first resistor (R1) second end with the single-chip microcontroller (20)
First output end (OUT1) connection；
Second triode (the P2) base stage and the second resistance (R2) first end connection, the 4th triode (P4)
Base stage and the 4th resistance (R4) first end connection, the 4th resistance (R4) second end and it is described second electricity
Hinder (R2) second output terminal (OUT of the second end with the single-chip microcontroller (20)2) connection.
9. water flooding detecting circuit as claimed in claim 5, which is characterized in that the water flooding detecting circuit further includes the first pull-up
Resistance (RX1) and the second pull-up resistor (RX2), wherein the third transistor (P3) base stage pass through first pull-up resistor
(RX1) connect with the anode of power supply, the 4th triode (P4) base stage pass through the second pull-up resistor (RX2) and power supply
Anode connection.
10. such as the described in any item water flooding detecting circuits of claim 5~9, which is characterized in that the water flooding detecting circuit also wraps
It includes alarm module (40), the alarm module (40) includes sound module (41) and/or display module (42), the sound module
(41) and/or the third output end (OUT of the display module (42) and the single-chip microcontroller (20)3) connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610801211.4A CN106441501B (en) | 2016-09-05 | 2016-09-05 | A kind of water flooding detecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610801211.4A CN106441501B (en) | 2016-09-05 | 2016-09-05 | A kind of water flooding detecting circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106441501A CN106441501A (en) | 2017-02-22 |
| CN106441501B true CN106441501B (en) | 2019-03-22 |
Family
ID=58164660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610801211.4A Active CN106441501B (en) | 2016-09-05 | 2016-09-05 | A kind of water flooding detecting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106441501B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108759977B (en) * | 2018-04-27 | 2020-09-15 | 青岛海尔科技有限公司 | Immersion detection device |
| CN111609901B (en) * | 2020-05-24 | 2022-08-02 | 哈尔滨理工大学 | High-precision short-distance ultrasonic liquid level measuring device |
| CN116558602A (en) * | 2022-01-28 | 2023-08-08 | 追觅创新科技(苏州)有限公司 | Liquid storage tank state detection method and device, storage medium and electronic device |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3755804A (en) * | 1971-10-18 | 1973-08-28 | W Johnson | Liquid level sensing system and apparatus |
| CN2045479U (en) * | 1988-10-27 | 1989-10-04 | 程俊杰 | Apparatus for liquid level electronic display and autocontrol warner |
| CN2147572Y (en) * | 1993-03-24 | 1993-11-24 | 开封市东方水电机械厂 | Water level controller |
| CN1362616A (en) * | 2001-01-08 | 2002-08-07 | 王晓峰 | Method of measuring level of conducting liquid |
| CN102128661A (en) * | 2011-01-30 | 2011-07-20 | 浙江达峰科技有限公司 | Electrode type water level sensor |
| CN102564526A (en) * | 2011-12-20 | 2012-07-11 | 西安天厚滤清技术有限责任公司 | Water level sensor circuit and water level sensor |
| CN202948336U (en) * | 2012-10-29 | 2013-05-22 | 陶兴建 | Fluid position display controller |
| CN203893911U (en) * | 2014-06-26 | 2014-10-22 | 广东瑞德智能科技股份有限公司 | Water level detection circuit |
| CN204924375U (en) * | 2015-08-27 | 2015-12-30 | 成都众山科技有限公司 | Contact water level alarm device |
| CN105203180A (en) * | 2015-09-16 | 2015-12-30 | 湖南中航精工有限公司 | Water level detection circuit of saturated steam generator |
-
2016
- 2016-09-05 CN CN201610801211.4A patent/CN106441501B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN106441501A (en) | 2017-02-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106441501B (en) | A kind of water flooding detecting circuit | |
| CN203365558U (en) | Circuit and device for three-phase power open-phase detection | |
| CN104215296A (en) | Liquid level detecting circuit, controller and water heater | |
| CN204287446U (en) | A kind of power-fail detection circuit | |
| CN107860799A (en) | TDS detection means and purifying kettle | |
| CN203350386U (en) | Photovoltaic inverter multi-path input reverse-connection detection circuit with self-diagnosis function | |
| CN108759977B (en) | Immersion detection device | |
| CN101334442B (en) | Earth wire detector | |
| CN205121826U (en) | Electron detection alarm circuit arrangement | |
| CN102468583A (en) | Control circuit | |
| CN203414136U (en) | Liquid-level sensor circuit | |
| CN206208340U (en) | Condensate tank of dehumidifier | |
| CN103323732B (en) | Photovoltaic inverter multi-channel input reverse connection detection circuit with self-diagnostic function | |
| CN103175620A (en) | Thermocouple welding detecting device | |
| CN204269750U (en) | Diode open-circuit testing circuit | |
| WO2021212840A1 (en) | Electric leakage detection circuit, electric leakage protection circuit, and household appliance | |
| CN204758847U (en) | Rainwater sensor circuit | |
| CN205029898U (en) | Electromagnetic heating system and surge detection device thereof | |
| CN104535924A (en) | Relay state detection processing circuit and detection processing method of relay state detection processing circuit | |
| CN204720956U (en) | A kind of three-phase uninterrupted power supply with lack detection circuit | |
| CN110353589A (en) | A kind of liquid level detection device, detection method and dish-washing machine | |
| CN206563781U (en) | Electric cooking pot and its failure detector | |
| CN207408023U (en) | A kind of online temperature monitor in contact with temperature deviation self-checking function | |
| CN108957316B (en) | Hydroelectric generator generating capacity real-time detection circuit and detection method thereof | |
| CN105809866B (en) | A kind of infrared detection device of wiring simplicity |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |