CN106441501A - Water fullness detection circuit - Google Patents
Water fullness detection circuit Download PDFInfo
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- CN106441501A CN106441501A CN201610801211.4A CN201610801211A CN106441501A CN 106441501 A CN106441501 A CN 106441501A CN 201610801211 A CN201610801211 A CN 201610801211A CN 106441501 A CN106441501 A CN 106441501A
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- 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
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- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention provides a water fullness detection circuit which comprises a first triode P1, a second triode P2, a third triode P3, a fourth triode P4, a first biasing resistor Rb1, a second biasing resistor Rb2, a pull-down resistor R0, a first collecting end J1, a second collecting end J2, a first input end I1, a second input end I2 and an output end O1. According to the water fullness detection circuit, the basic components such as the resistors and the triodes are adopted, the resistance of water is utilized to trigger water fullness signals, a single-chip microcomputer is utilized to collect the water fullness signals, and an alarm signal is triggered. According to the water fullness detection circuit, a current varying in directions is generated in water by communication and shutdown of the triodes under different signals, the influence of water electrolysis on detection signals is effectively solved, signal stability and detection result reliability are ensured, and thus normal operation and the service life of a device are effectively ensured.
Description
Technical field
The present invention relates to automatic control technology field, particularly relate to water flooding detecting technical field.
Background technology
Water flooding detecting function is required for using, such as families such as washing machine, dish-washing machine, water heater, heating stoves in a lot of household electrical appliances
Electrical appliance.Current water flooding detecting scheme is roughly divided into two kinds：A kind of method being to utilize physics, places one in water and floats
Son, when water is full, floating in the position of float, set out microswitch, it is thus achieved that the full signal of water；Another kind is to utilize circuit directly to detect
Water, also with the electric conductivity of water, by detecting the resistance of water, it is thus achieved that certain voltage signal, or utilize water resistance and
Electric capacity in circuit produces vibration, detects frequency signal.
Utilize the mode of this physics of switch to detect the full scheme of water, there is obvious shortcoming：Cost is very for the moment
Height, two is that service life is not long.Owing to switch is chronically in the environment of humidity, the contact surface of switch can gradually be corroded,
Attachment is gradually increased, and finally results in switch contact bad, and then cannot detect the full signal of water or false triggering signal, therefore needs
Periodically to change switch.
Another kind utilizes the scheme of the full signal of the resistance detection water of water, the problem that also cannot solve water electrolysis.Due to family expenses
In the Circuits System of electrical equipment, it is necessary to use dc source to single-chip microcomputer and other control, detection part be powered, institute
With when detection water is full, the voltage being added in water on two electrodes is DC voltage.Any water quality has certain conduction
Property, when adding DC voltage in water, water can be allowed to produce electrolysis, form hydrogen at negative electrode by reductive water, at anode by oxidation
Water forms oxygen.Therefore, when utilizing galvanic mode to detect water, due to the electrolysis of water quality, the content of water is fewer and feweri, but
Being that the electrolyte in water is constant, so the resistance of water reduces increasing over time, the electrolytic speed of water is more and more simultaneously
Hurry up；Thus cause the resistance of the water detecting to be changing value, so that the full signal of the water detecting can be more and more unstable.
Content of the invention
Present invention seek to address that problem as described above.It is an object of the present invention to provide a kind of solution in problem above
Any one water flooding detecting circuit.Specifically, the present invention provides the water flooding detecting circuit that can be prevented effectively from water electrolysis.
According to the first aspect of the invention, the invention provides a kind of water flooding detecting circuit, described water flooding detecting circuit bag
Include the first triode P1, the second triode P2, the 3rd triode 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 I2And output
End O1；
Wherein, described first triode P1Base stage and described first input end I1Connect, described first triode P1Send out
Emitter-base bandgap grading is connected with the positive pole of power supply, and described first triode P1Base stage and described first triode P1Emitter stage between logical
Cross described first biasing resistor Rb1Connect, described first triode P1Colelctor electrode and described first collection terminal J1Connect；
Described second triode P2Base stage and described second input I2Connect, described second triode P2Emitter stage
It is connected with the positive pole of power supply, and described second triode P2Base stage and described second triode P2Emitter stage between pass through institute
State the second biasing resistor Rb2Connect, described second triode P2Colelctor electrode and described second collection terminal J2Connect；
Described 3rd triode P3Base stage be connected with the positive pole of power supply, and with described first input end I1Connect；Described
Three triode P3Emitter stage and described second collection terminal J2Connect, described 3rd triode P3Colelctor electrode and described drop-down electricity
Resistance R0First end connect, described pull down resistor R0Second end ground connection；
Described 4th triode P4Base stage be connected with the positive pole of power supply, and with described second input I2Connect；Described
Four triode P4Emitter stage and described first collection terminal J1Connect, described 4th triode P4Colelctor electrode and described drop-down electricity
Resistance R0First end connect；Described pull down resistor R0The first end and described output O1Connect.
Wherein, described water flooding detecting circuit also includes filter circuit 10, and described filter circuit 10 includes load resistance RCWith
Electric capacity C, wherein, described load resistance RCThe first end and described pull down resistor R0First end connect, described load resistance RC's
First end of the second end and described electric capacity C all with described output O1Connect, the second end ground connection of described electric capacity C.
Wherein, described water flooding detecting circuit also includes the first resistance R1, the second resistance R2, the 3rd resistance R3And the 4th electricity
Resistance R4, wherein, described first triode P1Base stage and described first resistance R1First end connect, described 3rd triode P3
Base stage and described 3rd resistance R3First end connect, described 3rd resistance R3The second end and described first resistance R1?
Two ends all with described first input end I1Connect；Described second triode P2Base stage and described second resistance R2The first end even
Connect, described 4th triode P4Base stage and described 4th resistance R4First end connect, described 4th resistance R4The second end and
Described second resistance R2The second end all with described second input I2Connect.
Wherein, described water flooding detecting circuit also includes the first pull-up resistor RX1With the second pull-up resistor RX2, wherein, described
3rd triode P3Base stage pass through described first pull-up resistor RX1It is connected with the positive pole of power supply, described 4th triode P4Base
Described second pull-up resistor R is passed through in poleX2It is connected with the positive pole of power supply.
According to a further aspect in the invention, present invention also offers a kind of water flooding detecting circuit, described water flooding detecting circuit
Including single-chip microcomputer, the first detecting electrode, the second detecting electrode, the first triode P1, the second triode P2, the 3rd triode P3,
Four triode P4, the first biasing resistor Rb1, the second biasing resistor Rb2And pull down resistor R0；Wherein,
Described first triode P1The first output OUT of base stage and described single-chip microcomputer1Connect, described first triode
P1Emitter stage be connected with the positive pole of power supply, and described first triode P1Base stage and described first triode P1Emitter stage
Between pass through described first biasing resistor Rb1Connect, described first triode P1Colelctor electrode with described first detecting electrode even
Connect；
Described second triode P2The second output OUT of base stage and described single-chip microcomputer2Connect, described second triode
P2Emitter stage be connected with the positive pole of power supply, and described second triode P2Base stage and described second triode P2Emitter stage
Between pass through described second biasing resistor Rb2Connect, described second triode P2Colelctor electrode with described second detecting electrode even
Connect；
Described 3rd triode P3Base stage be connected with the positive pole of power supply, and the first output OUT with described single-chip microcomputer1
Connect；Described 3rd triode P3Emitter stage be connected with described second detecting electrode, described 3rd triode P3Colelctor electrode with
Described pull down resistor R0First end connect, described pull down resistor R0Second end ground connection；Described 4th triode P4Base stage with
The positive pole of power supply connects, and the second output OUT with described single-chip microcomputer2Connect；
Described 4th triode P4Emitter stage be connected with described first detecting electrode, described 4th triode P4Current collection
Pole and described pull down resistor R0First end connect；Described pull down resistor R0The first end and described single-chip microcomputer input In even
Connect；
Described single-chip microcomputer is used for producing adjustable square wave, and carries out analog-to-digital conversion to testing result to obtain water level detecting
Result.
Wherein, the first output OUT of described single-chip microcomputer1Export the first pulse width modulation (PWM) 1 signal, described monolithic
Second output OUT of machine2Exporting the second pulse width modulation (PWM) 2 signal, described PWM1 signal is complementary with described PWM2 signal
And with symmetrical dead band, described symmetrical dead band occurs when described PWM1 signal and described PWM2 signal are high level；
Within every half pulse period, described single-chip microcomputer 20 carries out multi collect；When described symmetrical Dead Time, monolithic
Machine does not carry out data acquisition.
Wherein, described water flooding detecting circuit also includes filter circuit, and described filter circuit includes load resistance RCAnd electric capacity
C, wherein, described load resistance RCThe first end and described pull down resistor R0First end connect, described load resistance RCSecond
First end of end and described electric capacity C is all connected with the input In of described single-chip microcomputer, the second end ground connection of described electric capacity C.
Wherein, described water flooding detecting circuit also includes the first resistance R1, the second resistance R2, the 3rd resistance R3And the 4th electricity
Resistance R4, wherein, described first triode P1Base stage and described first resistance R1First end connect, described 3rd triode P3
Base stage and described 3rd resistance R3First end connect, described 3rd resistance R3The second end and described first resistance R1?
The first output OUT all with described single-chip microcomputer for two ends1Connect；
Described second triode P2Base stage and described second resistance R2First end connect, described 4th triode P4's
Base stage and described 4th resistance R4First end connect, described 4th resistance R4The second end and described second resistance R2's
The second output OUT all with described single-chip microcomputer for second end2Connect.
Wherein, described water flooding detecting circuit also includes the first pull-up resistor RX1With the second pull-up resistor RX2, wherein, described
3rd triode P3Base stage pass through described first pull-up resistor RX1It is connected with the positive pole of power supply, described 4th triode P4Base
Described second pull-up resistor R is passed through in poleX2It is connected with the positive pole of power supply.
Wherein, described water flooding detecting circuit also includes alarm module, and described alarm module includes sounding module and/or display
Module, described sounding module and/or described display module and the 3rd output OUT of described single-chip microcomputer3Connect.
Use the components and parts such as basic resistance, triode according to water flooding detecting circuit provided by the present invention, utilize water
Resistance triggers the full signal of water, gathers the full signal of water with single-chip microcomputer, and triggers alarm signal.This water flooding detecting circuit utilizes three poles
Conducting under unlike signal for the pipe and cut-off make to produce in water the electric current of direction change, effectively solve the electrolysis of water to detection letter
Number impact, it is ensured that the stability of signal, the reliability of testing result, thus be effectively ensured the properly functioning of equipment and use the longevity
Life.
Following description for exemplary embodiment is read with reference to the drawings, and other property features of the present invention and advantage will
It is apparent from.
Brief description
It is incorporated in specification and constitutes a part of accompanying drawing of specification and show embodiments of the invention, and with
Describe together for explaining the principle of the present invention.In the drawings, the reference being similar to is for representing similar key element.Under
Accompanying drawing during face describes is some embodiments of the present invention, rather than whole embodiment.Those of ordinary skill in the art are come
Say, on the premise of not paying creative work, other accompanying drawing can be obtained according to these accompanying drawings.
Fig. 1 schematically illustrates the structural representation of a kind of embodiment of the water flooding detecting circuit according to the present invention；
Fig. 2 schematically illustrates the structural representation of the another kind of embodiment of the water flooding detecting circuit according to the present invention；
Fig. 3 schematically illustrates the signal output waveform figure of single-chip microcomputer in embodiment illustrated in fig. 2.
Detailed description of the invention
Purpose, technical scheme and advantage for making the embodiment of the present invention are clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
The a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment being obtained under the premise of not making creative work, broadly falls into the scope of protection of the invention.Need
Illustrating, in the case of not conflicting, the embodiment in the application and the feature in embodiment can mutually be combined.
The present invention utilizes conducting under unlike signal for the triode and cut-off to carry out circuit layout, and by being passed through two-way
Complementary pulse width modulating signal so that two electrodes in water use alternately as negative or positive electrode, are prevented effectively from electricity
The generation of water electrolysis phenomenon under stream effect, so that it is guaranteed that the detection stability of signal and reliability, it is ensured that equipment properly functioning.
Below in conjunction with the accompanying drawings, it is described in detail to according to water flooding detecting circuit provided by the present invention.
Fig. 1 shows the electrical block diagram of a kind of embodiment of a kind of water flooding detecting circuit according to the present invention.Ginseng
According to shown in Fig. 1, this water flooding detecting circuit includes the first triode P1, the second triode P2, the 3rd triode 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 defeated
Enter to hold I1, the second input I2And output O1.
Specifically, the first triode P1Base stage and first input end I1Connect, the first triode P1Emitter stage and power supply
Positive pole connect, and the first triode P1Base stage and the first triode P1Emitter stage between pass through the first biasing resistor Rb1Even
Connect, the first triode P1Colelctor electrode and the first collection terminal J1Connect；
Second triode P2Base stage and the second input I2Connect, the second triode P2The positive pole of emitter stage and power supply
Connect, and the second triode P2Base stage and the second triode P2Emitter stage between pass through the second biasing resistor Rb2Connect, the
Two triode P2Colelctor electrode and the second collection terminal J2Connect；
3rd triode P3Base stage be connected with the positive pole of power supply, and with first input end I1Connect；3rd triode P3's
Emitter stage and the second collection terminal J2Connect, the 3rd triode P3Colelctor electrode and pull down resistor R0First end connect, pull down resistor
R0Second end ground connection；
4th triode P4Base stage be connected with the positive pole of power supply, and with the second input I2Connect；4th triode P4's
Emitter stage and the first collection terminal J1Connect, the 4th triode P4Colelctor electrode and pull down resistor R0First end connect；
Pull down resistor R0The first end and output O1Connect.When water level changes, the resistance that water provides becomes
Changing, the electric current in water changes therewith, pull down resistor R0The voltage at two ends also changes, and therefore, it can by the drop-down electricity of detection
Resistance R0The voltage change at two ends, it is judged that the height of water level.
When using this water flooding detecting circuit to carry out the full signal detection of water, by the first collection terminal J1With the second collection terminal J2Respectively connect
Connect the electrode in the water putting into equipment to be detected, and at first input end I1With the second input I2Input two-way respectively mutual
The pulse width modulating signal mended so that the first collection terminal J1With the second collection terminal J2Alternately become negative or positive electrode, the one or two pole
Pipe P1With the 3rd diode P3, or the second diode P2With the 4th diode P4Turn in turn two-by-two, be prevented effectively from unidirectional energising
The impact that testing result is brought by the water electrolysis causing, and during detecting, the change of the water yield causes the change in resistance of water, this
Change ultimately results in pull down resistor R0The voltage change at two ends, therefore, it can by detection pull down resistor R0The magnitude of voltage at two ends comes
Monitoring SEA LEVEL VARIATION situation.
Further, for guaranteeing the pull down resistor R detecting0Stablizing of both end voltage value, it is to avoid have interference effect of signals
Testing result, this water flooding detecting circuit also includes filter circuit 10.This filter circuit 10 can be for being arbitrarily capable of filtering work(
The circuit form of energy, for example, in the present embodiment, filter circuit 10 includes load resistance RCWith electric capacity C, wherein, load resistance RC
The first end and pull down resistor R0First end connect, load resistance RCThe second end and electric capacity C the first end all with output O1
Connect, the second end ground connection of electric capacity C.
Specifically, this water flooding detecting circuit also includes the first resistance R1, the second resistance R2, the 3rd resistance R3And the 4th electricity
Resistance R4, wherein, the first triode P1Base stage and the first resistance R1First end connect, the 3rd triode P3Base stage and the 3rd
Resistance R3First end connect, the 3rd resistance R3The second end and the first resistance R1The second end all with first input end I1Connect；
Second triode P2Base stage and the second resistance R2First end connect, the 4th triode P4Base stage and the 4th resistance R4?
One end connects, the 4th resistance R4The second end and the second resistance R2The second end all with the second input I2Connect.
In addition, for the use safety ensureing triode, the water flooding detecting circuit of the present invention is additionally provided with pull-up resistor.As
In embodiment shown in Fig. 1, this water flooding detecting circuit also 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 connected with the positive pole of power supply, the 4th triode P4Base stage pass through second
Pull-up resistor RX2It is connected with the positive pole of power supply.
Fig. 2 shows the structural representation of the another kind of embodiment of the water flooding detecting circuit according to the present invention.With reference to Fig. 2 institute
Showing, this water flooding detecting circuit includes single-chip microcomputer the 20th, the first detecting electrode the 31st, the second detecting electrode the 32nd, the first triode P1, second
Triode P2, the 3rd triode P3, the 4th triode P4, the first biasing resistor Rb1, the second biasing resistor Rb2And pull down resistor
R0.Single-chip microcomputer 20 for producing the adjustable square wave of certain frequency and dutycycle, and testing result is carried out analog-to-digital conversion with
Obtain water level detecting result.
Wherein, the first triode P1The first output OUT of base stage and single-chip microcomputer 201Connect, the first triode P1Send out
Emitter-base bandgap grading is connected with the positive pole of power supply, and the first triode P1Base stage and the first triode P1Emitter stage between by first inclined
Put resistance Rb1Connect, the first triode P1Colelctor electrode and the first detecting electrode 31 connect；
Second triode P2The second output OUT of base stage and single-chip microcomputer 202Connect, the second triode P2Emitter stage
It is connected with the positive pole of power supply, and the second triode P2Base stage and the second triode P2Emitter stage between pass through the second biased electrical
Resistance Rb2Connect, the second triode P2Colelctor electrode and the second detecting electrode 32 connect；
3rd triode P3Base stage be connected with the positive pole of power supply, and the first output OUT with single-chip microcomputer 201Connect；The
Three triode P3Emitter stage and the second detecting electrode 32 connect, the 3rd triode P3Colelctor electrode and pull down resistor R0First
End connects, pull down resistor R0Second end ground connection；
4th triode P4Base stage be connected with the positive pole of power supply, and the second output OUT with single-chip microcomputer 202Connect；The
Four triode P4Emitter stage and the first detecting electrode 31 connect, the 4th triode P4Colelctor electrode and pull down resistor R0First
End connects；
Pull down resistor R0The first end be connected with the input In of single-chip microcomputer 20, the pull down resistor R that will detect0Two ends
Magnitude of voltage feed back to after single-chip microcomputer 20 carries out analog-to-digital conversion, it determines SEA LEVEL VARIATION situation.
Fig. 3 shows the oscillogram of a kind of embodiment of the output signal of single-chip microcomputer 20.Specifically, the first of single-chip microcomputer 20
Output OUT1Export the first pulse width modulation (PWM) 1 signal, the second output OUT of single-chip microcomputer 202Export the second pulse width
Degree modulation (PWM) 2 signal.In order to make the first detecting electrode 31 and the second detecting electrode 32 alternately become positive pole and negative pole, single-chip microcomputer
The PWM1 signal of 20 outputs and PWM2 signal need complementary and have identical dutycycle；Meanwhile, effectively use in order to ensure circuit,
Protection components and parts, have certain Dead Time at PWM1 signal and PWM2 signal, and are symmetrical dead band, and symmetrical dead band occurs
When PWM1 signal and PWM2 signal are high level, effectively to prevent triode from leading directly to.For example, PWM1 signal and PWM2 signal
Low duration is 100ms, and high level lasting time is 150ms, and such Dead Time could be arranged to 50ms,
That is, when PWM1 signal is for being in low level, before and after it each 25ms time in, PWM2 signal must be all high level.Often
In half pulse period, single-chip microcomputer 20 all can carry out repeatedly data acquisition, to detect water level conditions in real time；At pulse letter
When number being in symmetrical Dead Time, single-chip microcomputer 20 does not carry out data acquisition.
When PWM1 signal be low level, PWM2 signal be high level when, the first biasing resistor R1It is the first triode P1There is provided
Base current, electric current flows through P from positive source1And R1OUT to single-chip microcomputer 201, the first triode P1Conducting；In like manner, R3For P3
Base current, the 3rd triode P are provided3Conducting.Now, the first triode P1With the 3rd triode P3In the conduction state, second
Triode P2With the 4th triode P4Being closed, electric current flows through the first triode P successively from the positive pole of power supply1, first inspection
Survey electrode the 31st, the second detecting electrode the 32nd, the 3rd triode P3With pull down resistor R0To ground.
When PWM1 signal be high level, PWM2 signal be low level when, the second biasing resistor R2It is the second triode P2There is provided
Base current, electric current flows through P from positive source2And R2OUT to single-chip microcomputer 202, the second triode P2Conducting；In like manner, R4For P4
Base current, the 4th triode P are provided4Conducting.Now, the second triode P2With the 4th triode P4In the conduction state, first
Triode P1With the 3rd triode P3Being closed, electric current flows through the second triode P successively from the positive pole of power supply2, second inspection
Survey electrode the 32nd, the first detecting electrode the 31st, the 4th triode P4With pull down resistor R0To ground.
By controlling the first triode P respectively1With the 3rd triode P3Simultaneously turn on or the second triode P2With the 4th
Triode P4Simultaneously turn on so that the electric current flowing through water changed once every half pulse period, effectively solves unidirectional current and makees
Water electrolysis problem under with.
Although at the first triode P1With the 3rd triode P3Simultaneously turn on and the second triode P2With the 4th triode P4With
When conducting when, flow through the sense of current of water in change, but at pull down resistor R0The voltage swing of upper formation is constant.R0On
Voltage signal be delivered to single-chip microcomputer 20 and carry out analog-to-digital conversion after filter circuit 10 filtering, judge whether that water is full.Often
In half pulse period, single-chip microcomputer 20 carries out multi collect；When Dead Time, single-chip microcomputer 20 does not carry out data acquisition.
Specifically, it is judged that water completely can use various ways to carry out.For example, when water is not expired, the first detecting electrode 31
And cannot turn between the second detecting electrode 32, now R0On voltage close to 0V, single-chip microcomputer can be determined that as " water is less than shape
State "；When water is full, turn between the first detecting electrode 31 and the second detecting electrode 32, with R0Dividing potential drop, at R0The certain electricity of upper generation
Pressure value, after single-chip microcomputer collects this value, it is determined that for " the full state of water ".
Again for example, it is also possible to pass through pull down resistor R0On pressure value situation of change differentiate：For example, the first detecting electrode
31 and second detecting electrode 32 be fixedly installed somewhere, R when preset water is full0On pressure value, single-chip microcomputer 20 by the value that collects with
This preset value compares, when reaching preset value, it is determined that be " the full state of water ", when the numerical value collecting is less than preset value, it is determined that
For " water vacant state ".
Identical with the embodiment shown in Fig. 1, this water flooding detecting circuit also includes filter circuit 10, and filter circuit 10 can be
RC filter circuit, including load resistance RCWith electric capacity C.Wherein, load resistance RCThe first end and pull down resistor R0The first end even
Connect, load resistance RCThe second end and first end of electric capacity C be all connected with the input In of single-chip microcomputer 20, second end of electric capacity C
Ground connection.
Similarly, this water flooding detecting circuit also includes the first resistance R1, the second resistance R2, the 3rd resistance R3And the 4th electricity
Resistance R4, wherein, the first triode P1Base stage and the first resistance R1First end connect, the 3rd triode P3Base stage and the 3rd
Resistance R3First end connect, the 3rd resistance R3The second end and the first resistance R1The second end all defeated with the first of single-chip microcomputer 20
Go out to hold OUT1Connect；Second triode P2Base stage and the second resistance R2First end connect, the 4th triode P4Base stage and the
Four resistance R4First end connect, the 4th resistance R4The second end and the second resistance R2The second end all with single-chip microcomputer 20 second
Output OUT2Connect.
Further, water flooding detecting circuit can also include the first pull-up resistor RX1With the second pull-up resistor RX2, wherein,
3rd triode P3Base stage pass through the first pull-up resistor RX1It is connected with the positive pole of power supply, the 4th triode P4Base stage by the
Two pull-up resistor RX2It is connected with the positive pole of power supply.
In the present embodiment, this water flooding detecting circuit also includes alarm module 40, this alarm module 40 and single-chip microcomputer 20
3rd output OUT3It is connected.Specifically, alarm module 40 can include sounding module 41 and/or display module 42, sounding
Module 41 and/or the 3rd output OUT of display module 42 and single-chip microcomputer 203Connect.Occur module 41 can be alarm, example
As could be arranged to buzzer；Display module 42 could be arranged to light flash, display or LED numeral or text importing etc.
Form.This water flooding detecting circuit is by detection pull down resistor R0The magnitude of voltage at two ends, it is judged that when water is full, single-chip microcomputer 20 is by alarm signal
It number is delivered to alarm module 40, report to the police with the form of sounding and/or light.
Furthermore it is also possible to arrange the 3rd output OUT of single-chip microcomputer 203With opening of detected equipment or priming apparatus
Stop device is attached, and after detecting that water is full, can directly stop starting this detected equipment or priming apparatus.
Descriptions above can combine enforcement individually or in every way, and these variant all exist
Within protection scope of the present invention.
One of ordinary skill in the art will appreciate that all or part of step in said method can be instructed by program
Related hardware completes, and described program can be stored in computer-readable recording medium, such as read-only storage, disk or CD
Deng.Alternatively, all or part of step of above-described embodiment also can use one or more integrated circuit to realize, accordingly
Ground, each module/unit in above-described embodiment can use the form of hardware to realize, it would however also be possible to employ the shape of software function module
Formula realizes.The present invention is not restricted to the combination of the hardware and software of any particular form.
It should be noted that herein, the relational terms of such as first and second or the like is used merely to a reality
Body or operation separate with another entity or operating space, and deposit between not necessarily requiring or imply these entities or operating
Relation or order in any this reality.And, term " includes ", "comprising" or its any other variant are intended to
Comprising of nonexcludability, so that comprise the process of a series of key element, method, article or equipment not only include that those are wanted
Element, but also include other key elements being not expressly set out, or also include for this process, method, article or equipment
Intrinsic key element.In the case of there is no more restriction, the key element being limited by statement " including ... ", it is not excluded that at bag
The process, method, article or the equipment that include described key element there is also other identical element.
Finally it should be noted that：Above example only in order to technical scheme to be described, is not intended to limit.Although
With reference to previous embodiment, the present invention is described in detail, it will be understood by those within the art that：It still may be used
Modify with the technical scheme described in foregoing embodiments, or equivalent is carried out to wherein portion of techniques feature；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (10)
1. a water flooding detecting circuit, it is characterised in that described water flooding detecting circuit includes the first triode (P1), the two or three pole
Pipe (P2), the 3rd triode (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 (I2) and output
(O1)；
Wherein, described first triode (P1) base stage and described first input end (I1) connect, described first triode (P1)
Emitter stage is connected with the positive pole of power supply, and described first triode (P1) base stage and described first triode (P1) emitter stage
Between pass through described first biasing resistor (Rb1) connect, described first triode (P1) colelctor electrode and described first collection terminal
(J1) connect；
Described second triode (P2) base stage and described second input (I2) connect, described second triode (P2) transmitting
Pole is connected with the positive pole of power supply, and described second triode (P2) base stage and described second triode (P2) emitter stage between
By described second biasing resistor Rb2Connect, described second triode (P2) colelctor electrode and described second collection terminal (J2) even
Connect；
Described 3rd triode (P3) base stage be connected with the positive pole of power supply, and with described first input end (I1) connect；Described
Three triode (P3) emitter stage and described second collection terminal (J2) connect, described 3rd triode (P3) colelctor electrode with described
Pull down resistor (R0) first end connect, described pull down resistor (R0) second end ground connection；
Described 4th triode (P4) base stage be connected with the positive pole of power supply, and with described second input (I2) connect；Described
Four triode (P4) emitter stage and described first collection terminal (J1) connect, described 4th triode (P4) colelctor electrode with described
Pull down resistor (R0) first end connect；
Described pull down resistor (R0) the first end and described output (O1) connect.
2. water flooding detecting circuit as claimed in claim 1, it is characterised in that described water flooding detecting circuit also includes filter circuit
(10), described filter circuit (10) includes load resistance (RC) and electric capacity (C), wherein, described load resistance (RC) the first end with
Described pull down resistor (R0) first end connect, described load resistance (RC) the second end and described electric capacity (C) the first end all with
Described output (O1) connect, the second end ground connection of described electric capacity (C).
3. water flooding detecting circuit as claimed in claim 1 or 2, it is characterised in that described water flooding detecting circuit also includes first
Resistance (R1), the second resistance (R2), the 3rd resistance (R3) and the 4th resistance (R4), wherein, described first triode (P1) base
Pole and described first resistance (R1) first end connect, described 3rd triode (P3) base stage and described 3rd resistance (R3)
First end connects, described 3rd resistance (R3) the second end and described first resistance (R1) the second end all with described first input
End (I1) connect；
Described second triode (P2) base stage and described second resistance (R2) first end connect, described 4th triode (P4)
Base stage and described 4th resistance (R4) first end connect, described 4th resistance (R4) the second end and described second resistance
(R2) the second end all with described second input (I2) connect.
4. water flooding detecting circuit as claimed in claim 1, it is characterised in that described water flooding detecting circuit also includes the first pull-up
Resistance (RX1) and the second pull-up resistor (RX2), wherein, described 3rd triode (P3) base stage pass through described first pull-up resistor
(RX1) be connected with the positive pole of power supply, described 4th triode (P4) base stage pass through described second pull-up resistor (RX2) and power supply
Positive pole connects.
5. a water flooding detecting circuit, it is characterised in that described water flooding detecting circuit includes single-chip microcomputer (20), the first detecting electrode
(31), the second detecting electrode (32), the first triode (P1), the second triode (P2), the 3rd triode (P3), the 4th triode
(P4), the first biasing resistor (Rb1), the second biasing resistor (Rb2) and pull down resistor (R0), wherein,
Described first triode (P1) the first output (OUT of base stage and described single-chip microcomputer (20)1) connect, the described 1st
(P is managed in pole1) emitter stage be connected with the positive pole of power supply, and described first triode (P1) base stage and described first triode
(P1) emitter stage between pass through described first biasing resistor (Rb1) connect, described first triode (P1) colelctor electrode with described
First detecting electrode (31) connects；
Described second triode (P2) the second output (OUT of base stage and described single-chip microcomputer (20)2) connect, the described 2nd 3
(P is managed in pole2) emitter stage be connected with the positive pole of power supply, and described second triode (P2) base stage and described second triode
(P2) emitter stage between pass through described second biasing resistor (Rb2) connect, described second triode (P2) colelctor electrode with described
Second detecting electrode (32) connects；
Described 3rd triode (P3) base stage be connected with the positive pole of power supply, and the first output with described single-chip microcomputer (20)
(OUT1) connect；Described 3rd triode (P3) emitter stage be connected with described second detecting electrode (32), described 3rd triode
(P3) colelctor electrode and described pull down resistor (R0) first end connect, described pull down resistor (R0) second end ground connection；
Described 4th triode (P4) base stage be connected with the positive pole of power supply, and the second output with described single-chip microcomputer (20)
(OUT2) connect；Described 4th triode (P4) emitter stage be connected with described first detecting electrode (31), described 4th triode
(P4) colelctor electrode and described pull down resistor (R0) first end connect；
Described pull down resistor (R0) the first end be connected with the input (In) of described single-chip microcomputer (20)；
Described single-chip microcomputer (20) is used for producing adjustable square wave, and carries out analog-to-digital conversion to testing result to obtain water level detecting
Result.
6. water flooding detecting circuit as claimed in claim 5, it is characterised in that the first output of described single-chip microcomputer (20)
(OUT1) export the first pulse width modulation (PWM) 1 signal, the second output (OUT of described single-chip microcomputer (20)2) export the second arteries and veins
Rushing width modulated PWM2 signal, described PWM1 signal is complementary with described PWM2 signal and with symmetrical dead band, described symmetrical dead band
Occur when described PWM1 signal and described PWM2 signal are high level；
Within every half pulse period, described single-chip microcomputer (20) carries out multi collect；When described symmetrical Dead Time, single-chip microcomputer
(20) data acquisition is not carried out.
7. water flooding detecting circuit as claimed in claim 5, it is characterised in that described water flooding detecting circuit also includes filter circuit
(10), described filter circuit (10) includes load resistance (RC) and electric capacity (C), wherein, described load resistance (RC) the first end with
Described pull down resistor (R0) first end connect, described load resistance (RC) the second end and described electric capacity (C) the first end all with
The input (In) of described single-chip microcomputer (20) connects, the second end ground connection of described electric capacity (C).
8. water flooding detecting circuit as claimed in claim 5, it is characterised in that described water flooding detecting circuit also includes the first resistance
(R1), the second resistance (R2), the 3rd resistance (R3) and the 4th resistance (R4), wherein, described first triode (P1) base stage with
Described first resistance (R1) first end connect, described 3rd triode (P3) base stage and described 3rd resistance (R3) first
End connects, described 3rd resistance (R3) the second end and described first resistance (R1) the second end all with described single-chip microcomputer (20)
First output (OUT1) connect；
Described second triode (P2) base stage and described second resistance (R2) first end connect, described 4th triode (P4)
Base stage and described 4th resistance (R4) first end connect, described 4th resistance (R4) the second end and described second electricity
Resistance (R2) the second output (OUT all with described single-chip microcomputer (20) for second end2) connect.
9. water flooding detecting circuit as claimed in claim 5, it is characterised in that described water flooding detecting circuit also includes the first pull-up
Resistance (RX1) and the second pull-up resistor (RX2), wherein, described 3rd triode (P3) base stage pass through described first pull-up resistor
(RX1) be connected with the positive pole of power supply, described 4th triode (P4) base stage pass through described second pull-up resistor (RX2) and power supply
Positive pole connects.
10. the water flooding detecting circuit as described in any one of claim 5～9, it is characterised in that described water flooding detecting circuit also wraps
Including alarm module (40), described alarm module (40) includes sounding module (41) and/or display module (42), described sounding module
And/or the 3rd output (OUT of described display module (42) and described single-chip microcomputer (20) (41)3) connect.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610801211.4A CN106441501B (en) | 2016-09-05 | 2016-09-05 | A kind of water flooding detecting circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610801211.4A CN106441501B (en) | 2016-09-05 | 2016-09-05 | A kind of water flooding detecting circuit |
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| CN106441501B CN106441501B (en) | 2019-03-22 |
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| Publication number | Publication date |
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| CN106441501B (en) | 2019-03-22 |
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