CN106933263A - A kind of cattle breeding automatic water-feeding device is with low interference automatic water supplementation control system - Google Patents
A kind of cattle breeding automatic water-feeding device is with low interference automatic water supplementation control system Download PDFInfo
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- CN106933263A CN106933263A CN201710157489.7A CN201710157489A CN106933263A CN 106933263 A CN106933263 A CN 106933263A CN 201710157489 A CN201710157489 A CN 201710157489A CN 106933263 A CN106933263 A CN 106933263A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
- G05D9/12—Level control, e.g. controlling quantity of material stored in vessel characterised by the use of electric means
Abstract
The invention discloses a kind of cattle breeding automatic water-feeding device with low interference automatic water supplementation control system, it is characterized in that, mainly by single-chip microcomputer, the magnetic valve being connected with single-chip microcomputer respectively and V/F modular converters, and the level sensor composition being connected with V/F modular converters.V/F modular converters in the present invention can carry out amplitude limit and filtering process while being changed to detection signal to the waveform of detection signal, improve the stability of detection signal, so that single-chip microcomputer can preferably be identified to detection signal, compare, the preferably opening and closing of control magnetic valve, so as to more accurately control the water in hello pond, to meet the drinking-water demand of poultry.
Description
Technical field
The present invention relates to home poultry raising field, specifically refer to a kind of cattle breeding automatic water-feeding device and mended with low interference is automatic
Water control system.
Background technology
During home poultry raising, poultry raiser must feed water to poultry daily, and traditional method is by manually to family
Fowl feeds water, but with the continuous expansion of raising scale, then needs to spend substantial amounts of cost of labor using traditional water method of feeding.For
Solve the above problems, occurred in that automatic water-feeding device on the market at present, automatic water-feeding device is using level sensor to feeding
Water in pond is monitored, and when water is very few then by control system automatic controlled water replanishing, and controls to feed the water in pond
Amount.Poultry is carried out using automatic water-feeding device feed water, can effectively replace manually feeding water, saved it is substantial amounts of it is artificial into
This.But control accuracy of the automatic water-feeding device for using at present still in the presence of very big defect, i.e. its control system be not high, its
Water that cannot be effectively to feeding pond is controlled, it is impossible to meet the drinking-water demand of poultry.
The content of the invention
The control accuracy of the control system it is an object of the invention to overcome current automatic water-feeding device to be used is not high,
The defect that effectively cannot be controlled to the water for feeding pond, there is provided a kind of low interference of cattle breeding automatic water-feeding device is certainly
Dynamic make-up water supply control system.
The purpose of the present invention is achieved through the following technical solutions：A kind of cattle breeding automatic water-feeding device is automatic with low interference
Make-up water supply control system, mainly by single-chip microcomputer, the magnetic valve and V/F modular converters being connected with single-chip microcomputer respectively, and turn with V/F
The level sensor composition that mold changing block is connected；The V/F modular converters are by amplifier P1, amplifier P2, amplifier P3, positive pole
Be connected with the positive pole of amplifier P1, the electric capacity C5 that negative pole is connected with the output end of amplifier P1, be serially connected in amplifier P1's
Resistance R7 between the output end of positive pole and amplifier P2, one end is connected with the negative pole of amplifier P1, the electricity of other end ground connection
Resistance R6, the output end of resistance R8, the P pole and amplifier P2 that are serially connected between the positive pole of the output end of amplifier P1 and amplifier P2
Be connected, the diode D3 that N poles are connected with the positive pole of amplifier P2, positive pole is connected with the output end of amplifier P2, negative pole
The electric capacity C6 being connected with the output end of amplifier P3, one end is connected with the negative pole of amplifier P3, the resistance of other end ground connection
R9, the frontend amplifying circuit being connected with the positive pole of amplifier P3, be serially connected in frontend amplifying circuit and amplifier P2 negative pole it
Between resistance R10, the high-pass filtering circuit being connected with the output end of amplifier P3, and respectively with the output end of amplifier P2
The freq converting circuit composition being connected with high-pass filtering circuit.The output end of the amplifier P1 and the positive pole phase of amplifier P3
Connection.Output termination+12V the voltages of the amplifier P2.The output end of the freq converting circuit is connected with single-chip microcomputer, institute
The input for stating frontend amplifying circuit is then connected with level sensor.
Further, by triode VT, amplifier P4, negative pole is connected the high-pass filtering circuit with the negative pole of amplifier P4
Connect, the electric capacity C12 that positive pole is connected with the output end of amplifier P3, negative pole is connected with the base stage of triode VT, positive pole is through electricity
The electric capacity C13 being connected with the negative pole of amplifier P4 after resistance R15, one end is connected with the emitter stage of triode VT, another termination
The resistance R17 on ground, the electric capacity that positive pole is connected with the output end of amplifier P4, negative pole is connected with the colelctor electrode of triode VT
The diode D4 that C14, P pole ground connection, N poles are connected after potentiometer R16 with the output end of amplifier P4, and positive pole and amplification
The electric capacity C15 compositions that the output end of device P4 is connected, negative pole is connected with freq converting circuit；The positive pole of the amplifier P4 is same
Enter and be connected with the N poles of diode D4 and the control end of potentiometer R16.
The frontend amplifying circuit is serially connected in N poles and the process chip U1 of diode D1 by process chip U1, diode D1
- IN pins between resistance R1, one end is connected with+IN the pins of process chip U1, the P of the other end and diode D1 is extremely common
With formed input and be connected with level sensor resistance R2, P poles ground connection, N poles after resistance R4 with process chip U1's
The diode D2 that REF pins are connected, positive pole is connected with+IN the pins of process chip U1, the P poles phase of negative pole and diode D2
The electric capacity C2 of connection, one end is connected with-VS the pins of process chip U1, the other end is negative with amplifier P2 after resistance R10
The resistance R3 that pole is connected, positive pole is connected with the RG2 pins of process chip U1, negative pole is connected with the P poles of diode D2
Electric capacity C4, negative pole is connected with the RG1 pins of process chip U1, positive pole is connected after potentiometer R5 with the negative pole of electric capacity C4
Electric capacity C1, and positive pole is connected with+VS the pins of process chip U1, the electric capacity C3 of negative pole ground connection is constituted；The process chip
+ VS the pins of U1 connect+12V voltages, its OUT pin and are connected with the positive pole of amplifier P3；The company of the resistance R3 and resistance R10
Contact is grounded；Control end of the negative pole of the electric capacity C4 also with potentiometer R5 is connected.
The freq converting circuit is serially connected in the P poles of diode D3 and the VS pins of process chip U2 by conversion chip U2
Between resistance R12, negative pole is connected with the VS pins of conversion chip U2, the electric capacity C7 of plus earth, positive pole and conversion chip
The VS pins of U2 are connected, the electric capacity C9 of negative pole ground connection, be grounded while negative pole is connected with the GND pins of conversion chip U2,
The electric capacity C8 that positive pole is connected after resistance R11 with the REF pins of conversion chip U2, is serially connected in the OUT pins of conversion chip U2
And the resistance R13 between FREQ pins, positive pole is connected with the FREQ pins of conversion chip U2, negative pole is grounded after resistance R14
Electric capacity C11, and positive pole is connected with the OUT pins of conversion chip U2, negative pole is connected as output end and with single-chip microcomputer
Electric capacity C10 composition；The RC pins of the conversion chip U2 are connected with the negative pole of electric capacity C7, its THRES pin then with electric capacity
The negative pole of C11 is connected, its negative pole of IN pins then with electric capacity C15 is connected.
The process chip U1 is AD620 integrated chips, and the conversion chip U2 is LM331 integrated chips.
The present invention compared with the prior art, with advantages below and beneficial effect：
(1) V/F modular converters of the invention can also be to the ripple of detection signal while being changed to detection signal
Shape carries out amplitude limit, the stability of detection signal is improved, so that single-chip microcomputer can preferably be identified to detection signal, compare
It is right, the preferably opening and closing of control magnetic valve such that it is able to which the water in pond is fed in more accurately control, to meet poultry
Drinking-water demand.
(2) V/F modular converters of the invention can be filtered the interference in detection signal, the shadow for excluding the interference signal
Ring, single-chip microcomputer is preferably identified to detection signal, is compared, preferably the opening and closing of control magnetic valve, from
And can more accurately control to feed the water in pond, to meet the drinking-water demand of poultry.
Brief description of the drawings
Fig. 1 is overall structure figure of the invention.
Fig. 2 is the structure chart of V/F modular converters of the invention.
Fig. 3 is the structure chart of high-pass filtering circuit of the invention.
Specific embodiment
The present invention is described in further detail with reference to embodiment, but embodiments of the present invention are not limited to
This.
Embodiment
As shown in figure 1, the present invention is main being made up of single-chip microcomputer, magnetic valve, V/F modular converters and level sensor.Its
In, the signal output interface of the level sensor is connected with the input of V/F modular converters, and it is used to detect feeds in pond
Water level simultaneously exports corresponding electric signal and gives V/F modular converters, and it need to be arranged at feeds inside pond；The level sensor is used
AL200W type pressure resistance type level sensors, the AL200W type pressure resistance type level sensors are by the liquid pressure being directly proportional to liquid level depth
Power is accurately measured to be come, and is converted into standard electric signal output, it is established that the linear corresponding relation of output signal and liquid depth,
Such that it is able to measure level sensor end to the liquid level of liquid level, the water fed in pond is drawn.The V/F modular converters
Electric signal for level sensor to be exported is processed, and is converted to frequency signal and is exported to single-chip microcomputer.
Used as control centre of the invention, the inside that it is internally provided with setting value, the i.e. single-chip microcomputer is set the single-chip microcomputer
Have and feed required water value in pond, after detection signal is input to single-chip microcomputer, single-chip microcomputer by detection signal be identified and with
Internal setting value is compared, and exports corresponding control signal to magnetic valve, and control magnetic valve is opened or closed, so as to give
Water replenishment is fed, the control to feeding pond water is realized；The single-chip microcomputer realized using AT89S51 types single-chip microcomputer, the AT89S51
The P1.0I/O interfaces of single-chip microcomputer are connected with the output end of V/F modular converters, its P2.1I/O interface then with the control of magnetic valve
End is connected.The magnetic valve is arranged on the filling pipe for feeding pond.
In order to preferably be processed electric signal and be changed, as shown in Fig. 2 the V/F modular converters are put by amplifier P1
Big device P2, amplifier P3, the electric capacity that positive pole is connected with the positive pole of amplifier P1, negative pole is connected with the output end of amplifier P1
C5, is serially connected in the resistance R7 between the output end of the positive pole of amplifier P1 and amplifier P2, the negative pole phase of one end and amplifier P1
Connection, the resistance R6 of other end ground connection, are serially connected in resistance R8, P between the positive pole of the output end of amplifier P1 and amplifier P2
The diode D3 that pole is connected with the output end of amplifier P2, N poles are connected with the positive pole of amplifier P2, positive pole and amplifier P2
Output end be connected, the electric capacity C6 that negative pole is connected with the output end of amplifier P3, one end is connected with the negative pole of amplifier P3
Connect, the resistance R9 of other end ground connection, the frontend amplifying circuit being connected with the positive pole of amplifier P3 is serially connected in frontend amplifying circuit
And the resistance R10 between the negative pole of amplifier P2, the high-pass filtering circuit being connected with the output end of amplifier P3, and respectively
The freq converting circuit composition being connected with the output end and high-pass filtering circuit of amplifier P2.The output end of the amplifier P1
Positive pole with amplifier P3 is connected.Output termination+12V the voltages of the amplifier P2.The output of the freq converting circuit
End is connected with single-chip microcomputer, and the input of the frontend amplifying circuit is then connected with level sensor.
The electric signal that level sensor is exported can be amplified treatment by the frontend amplifying circuit.And amplifier P1, electricity
Resistance R6 and electric capacity C5 collectively constitutes an integrating circuit, and the integrating circuit can be carried out the offset voltage of frontend amplifying circuit
Eliminate；The amplifier P2, amplifier P3, electric capacity C6 and resistance R9 then constitute an amplitude limiter circuit, and the amplitude limiter circuit can cut
Go the interference of electric signal waveform top and lower curtate；It is such then can be very good for the waveform of detection signal to carry out amplitude limit, improve inspection
Survey the stability of signal.The high-pass filtering circuit can be filtered to the interference signal in detection signal, improve detection signal
Cleannes.The freq converting circuit can convert electrical signals to frequency signal and export to single-chip microcomputer, because electric signal passes through
After amplitude limit and filtering process, so the frequency signal after freq converting circuit conversion is more stablized, so that single-chip microcomputer can be more
Good is identified to detection signal, compares, preferably the opening and closing of control magnetic valve such that it is able to more accurately control
The water in pond is fed, to meet the drinking-water demand of poultry.Amplifier P1 uses LM118 high speed and precision operational amplifiers, amplifies
Device P2 and amplifier P3 then use LM119 type amplifiers, and the resistance of resistance R6 and resistance R7 is 20K Ω, resistance R8~R10's
The capacitance that resistance is 15K Ω, electric capacity C5 and electric capacity C6 is 0.02 μ F, the model 1N914 of diode D3.
The frontend amplifying circuit is by process chip U1, diode D1, resistance R1, resistance R2, resistance R3, resistance R4, current potential
Device R5, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4 and diode D2 are constituted.
During connection, resistance R1 is serially connected between the N poles of diode D1 and the-IN pins of process chip U1.The one of resistance R2
End is connected with+IN the pins of process chip U1, and the other end is collectively forming input and and level sensor with the P poles of diode D1
The signal output interface of device is connected.Diode D2 P poles ground connection, N poles after resistance R4 with the REF pin phases of process chip U1
Connection.The positive pole of electric capacity C2 is connected with+IN the pins of process chip U1, and negative pole is connected with the P poles of diode D2.Resistance R3
One end be connected with-VS the pins of process chip U1, negative pole of the other end with amplifier P2 after resistance R10 is connected.Electricity
The positive pole for holding C4 is connected with the RG2 pins of process chip U1, and negative pole is connected with the P poles of diode D2.The negative pole of electric capacity C1
It is connected with the RG1 pins of process chip U1, negative pole of the positive pole with electric capacity C4 after potentiometer R5 is connected.The positive pole of electric capacity C3
It is connected with+VS the pins of process chip U1, negative pole ground connection.+ VS the pins of the process chip U1 connect+12V voltages, its OUT
Pin is connected with the positive pole of amplifier P3.The tie point ground connection of the resistance R3 and resistance R10.The negative pole of the electric capacity C4 is also
Control end with potentiometer R5 is connected.
The electric signal output of level sensor output is amplified by process chip U1 to after process chip U1 to electric signal
Treatment, the resistance of regulation potentiometer R5 can then adjust the multiplication factor of electric signal.Process chip U1 uses the integrated cores of AD620
Piece, the maximum value of potentiometer R5 is 12K Ω, the resistance of resistance R3 and resistance R4 for the resistance of 1K Ω, resistance R1 and resistance R2
The capacitance that value is 18K Ω, electric capacity C1 and electric capacity C2 is the appearance resistance of 1000PF, electric capacity C3 and electric capacity C4 and is 0.1 μ F, two
The model of pole pipe D1 and diode D2 is 1N914.
In addition, the freq converting circuit is by conversion chip U2, resistance R11, resistance R12, resistance R13, resistance R14, electric capacity
C7, electric capacity C8, electric capacity C9, electric capacity C10 and electric capacity C11 are constituted.
During connection, resistance R12 is serially connected between the P poles of diode D3 and the VS pins of process chip U2.Electric capacity C7's is negative
Pole is connected with the VS pins of conversion chip U2, plus earth.The positive pole of electric capacity C9 is connected with the VS pins of conversion chip U2,
Negative pole is grounded.While the negative pole of electric capacity C8 is connected with the GND pins of conversion chip U2 be grounded, positive pole after resistance R11 with
The REF pins of conversion chip U2 are connected.Resistance R13 is serially connected between the OUT pins of conversion chip U2 and FREQ pins.Electric capacity
The positive pole of C11 is connected with the FREQ pins of conversion chip U2, and negative pole is grounded after resistance R14.The positive pole of electric capacity C10 and conversion
The OUT pins of chip U2 are connected, and negative pole is connected as output end and with the P1.0I/O interfaces of single-chip microcomputer.The conversion core
The RC pins of piece U2 are connected with the negative pole of electric capacity C7, and its negative pole of THRES pins then with electric capacity C11 is connected, its IN pin
Then it is connected with high-pass filtering circuit.
The electric signal output of amplifier P3 outputs is converted electrical signals to accordingly to conversion chip U2 by conversion chip U2
Frequency signal export to single-chip microcomputer.Conversion chip U2 is LM331 integrated chips, and the capacitance of electric capacity C9 is 0.1 μ F, electric capacity
The capacitance of C8, electric capacity C10 and electric capacity C11 is 0.01 μ F, and the resistance of resistance R12 is 20K Ω, and resistance R11 is 18K Ω's
High-accuracy resistance, resistance R14 is the high-accuracy resistance of 100K Ω, and the resistance of resistance R13 is 2.7K Ω, and the capacitance of electric capacity C7 is
1000PF。
The high-pass filtering circuit can be filtered the interference signal in detection signal, and its structure is as shown in figure 3, by three
Pole pipe VT, amplifier P4, resistance R5, potentiometer R16, resistance R17, diode D4, electric capacity C12, electric capacity C13, electric capacity C14 and
Electric capacity C15 is constituted.
During connection, the negative pole of electric capacity C12 is connected with the negative pole of amplifier P4, and positive pole is connected with the output end of amplifier P3
Connect.The negative pole of electric capacity C13 is connected with the base stage of triode VT, and negative pole of the positive pole with amplifier P4 after resistance R15 is connected.
One end of resistance R17 is connected with the emitter stage of triode VT, other end ground connection.The positive pole of electric capacity C14 is defeated with amplifier P4's
Go out end to be connected, negative pole is connected with the colelctor electrode of triode VT.Diode D4 P poles ground connection, N poles after potentiometer R16 with
The output end of amplifier P4 is connected.The positive pole of electric capacity C15 is connected with the output end of amplifier P4, and negative pole is electric with frequency conversion
Road is connected.The positive pole of the amplifier P4 is same to be entered to be connected with the N poles of diode D4 and the control end of potentiometer R16.
Amplifier P4, triode VT, electric capacity C13, electric capacity C14, potentiometer R16 and resistance R15 collectively constitute one it is high
Bandpass filter；The detection signal of amplifier P3 outputs inputs to the high-pass filter after electric capacity C12, will be examined by high-pass filter
The interference signal surveyed in signal is filtered, the influence for excluding the interference signal, the essence of the frequency signal after changing change-over circuit
Du Genggao so that single-chip microcomputer can preferably be identified to detection signal, compare, preferably the opening of control magnetic valve and
Close such that it is able to which the water in pond is fed in more accurately control, to meet the drinking-water demand of poultry.By adjusting potentiometer R16
The frequency filtering of high-pass filter can then be changed.The model LM119 of amplifier P4, the model of triode VT
The capacitance of the model 1N4001 of 3DG12C, diode D4, electric capacity C12 and electric capacity C15 is 0.1 μ F, electric capacity C13 and electric capacity
The capacitance of C14 is 1 μ F, and the resistance of resistance R15 and resistance R17 is 33K Ω, and the maximum value of potentiometer R16 is then 15.8K
Ω。
The V/F modular converters waveform of detection signal can be carried out while being changed to detection signal amplitude limit and
Filtering process, improves the stability of detection signal, so that single-chip microcomputer can preferably be identified to detection signal, compare,
The preferably opening and closing of control magnetic valve such that it is able to which the water in pond is fed in more accurately control, to meet the drink of poultry
Water demand.
During work, the water in pond is fed in level sensor detection, and is exported corresponding electric signal and given V/F modular converters,
The V/F modular converters export corresponding frequency signal to single-chip microcomputer after processing electric signal, single-chip microcomputer enters to frequency signal
Row identification setting value simultaneously internal with it is compared, when detected value is less than setting value, its export corresponding control signal to
Magnetic valve, opens magnetic valve, starts to hello water replenishment；When detected value is more than setting value, single-chip microcomputer is then outputed signal to
Magnetic valve, makes closed electromagnetic valve, so as to stop feeding water replenishment；It is such then can be very good to feed pond in water carry out
It is accurately controlled, to meet the drinking-water demand of domestic animal.
As described above, just can well realize the present invention.
Claims (5)
1. a kind of cattle breeding automatic water-feeding device is with low interference automatic water supplementation control system, it is characterised in that main by monolithic
Machine, the magnetic valve being connected with single-chip microcomputer respectively and V/F modular converters, and the level sensor being connected with V/F modular converters
Device is constituted；The V/F modular converters are connected by amplifier P1, amplifier P2, amplifier P3, positive pole with the positive pole of amplifier P1
Connect, the electric capacity C5 that negative pole is connected with the output end of amplifier P1, be serially connected in the output of the positive pole and amplifier P2 of amplifier P1
Resistance R7 between end, one end is connected with the negative pole of amplifier P1, the resistance R6 of other end ground connection, is serially connected in amplifier P1's
Resistance R8, P pole between the positive pole of output end and amplifier P2 is connected with the output end of amplifier P2, N poles and amplifier P2
The diode D3 that is connected of positive pole, positive pole is connected with the output end of amplifier P2, the output end phase of negative pole and amplifier P3
The electric capacity C6 of connection, one end is connected with the negative pole of amplifier P3, the resistance R9 of other end ground connection, the positive pole phase with amplifier P3
The frontend amplifying circuit of connection, is serially connected in the resistance R10 between the negative pole of frontend amplifying circuit and amplifier P2, with amplifier P3
The output end high-pass filtering circuit that is connected, and be connected with the output end and high-pass filtering circuit of amplifier P2 respectively
Freq converting circuit is constituted；The output end of the amplifier P1 is connected with the positive pole of amplifier P3；The amplifier P2's is defeated
Go out termination+12V voltages；The output end of the freq converting circuit is connected with single-chip microcomputer, the input of the frontend amplifying circuit
End is then connected with level sensor.
2. a kind of cattle breeding automatic water-feeding device according to claim 1 is with low interference automatic water supplementation control system, its
It is characterised by, by triode VT, amplifier P4, negative pole is connected the high-pass filtering circuit with the negative pole of amplifier P4, positive pole
The electric capacity C12 being connected with the output end of amplifier P3, negative pole is connected with the base stage of triode VT, positive pole is after resistance R15
The electric capacity C13 being connected with the negative pole of amplifier P4, one end is connected with the emitter stage of triode VT, the resistance of other end ground connection
R17, electric capacity C14, the P poles that positive pole is connected with the output end of amplifier P4, negative pole is connected with the colelctor electrode of triode VT connect
The diode D4 that ground, N poles are connected after potentiometer R16 with the output end of amplifier P4, and positive pole is defeated with amplifier P4
Go out the electric capacity C15 compositions that end is connected, negative pole is connected with freq converting circuit；The positive pole of the amplifier P4 enters together and two poles
The N poles of pipe D4 are connected with the control end of potentiometer R16.
3. a kind of cattle breeding automatic water-feeding device according to claim 2 is with low interference automatic water supplementation control system, its
It is characterised by, the frontend amplifying circuit is serially connected in N poles and the process chip of diode D1 by process chip U1, diode D1
Resistance R1 between the-IN pins of U1, one end is connected with+IN the pins of process chip U1, the P poles of the other end and diode D1
Be collectively forming input and be connected with level sensor resistance R2, P poles ground connection, N poles after resistance R4 with process chip U1
The diode D2 that is connected of REF pins, positive pole is connected with+IN the pins of process chip U1, the P poles of negative pole and diode D2
The electric capacity C2 being connected, one end is connected with-VS the pins of process chip U1, the other end after resistance R10 with amplifier P2's
The resistance R3 that negative pole is connected, positive pole is connected with the RG2 pins of process chip U1, negative pole is connected with the P poles of diode D2
Electric capacity C4, negative pole is connected with the RG1 pins of process chip U1, negative pole of the positive pole with electric capacity C4 after potentiometer R5 is connected
Electric capacity C1, and positive pole be connected with+VS the pins of process chip U1, negative pole ground connection electric capacity C3 composition；The treatment core
+ VS the pins of piece U1 connect+12V voltages, its OUT pin and are connected with the positive pole of amplifier P3；The resistance R3's and resistance R10
Tie point is grounded；Control end of the negative pole of the electric capacity C4 also with potentiometer R5 is connected.
4. a kind of cattle breeding automatic water-feeding device according to claim 3 is with low interference automatic water supplementation control system, its
It is characterised by, the freq converting circuit is serially connected in the P poles of diode D3 and the VS pins of process chip U2 by conversion chip U2
Between resistance R12, negative pole is connected with the VS pins of conversion chip U2, the electric capacity C7 of plus earth, positive pole and conversion chip
The VS pins of U2 are connected, the electric capacity C9 of negative pole ground connection, be grounded while negative pole is connected with the GND pins of conversion chip U2,
The electric capacity C8 that positive pole is connected after resistance R11 with the REF pins of conversion chip U2, is serially connected in the OUT pins of conversion chip U2
And the resistance R13 between FREQ pins, positive pole is connected with the FREQ pins of conversion chip U2, negative pole is grounded after resistance R14
Electric capacity C11, and positive pole is connected with the OUT pins of conversion chip U2, negative pole is connected as output end and with single-chip microcomputer
Electric capacity C10 composition；The RC pins of the conversion chip U2 are connected with the negative pole of electric capacity C7, its THRES pin then with electric capacity
The negative pole of C11 is connected, its negative pole of IN pins then with electric capacity C15 is connected.
5. a kind of cattle breeding automatic water-feeding device according to claim 4 is with low interference automatic water supplementation control system, its
It is characterised by, the process chip U1 is AD620 integrated chips, the conversion chip U2 is LM331 integrated chips.
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| CN103837170A (en) * | 2012-11-28 | 2014-06-04 | 常州大学 | Automatic frequency compensating circuit and method for frequency output type sensors |
| CN103970158A (en) * | 2014-05-17 | 2014-08-06 | 浙江工贸职业技术学院 | Automatic liquid level control device |
| CN104165670A (en) * | 2014-07-03 | 2014-11-26 | 深圳市赛亿科技开发有限公司 | Water level control method applied to water drinking device |
| CN106323412A (en) * | 2016-08-30 | 2017-01-11 | 成都东创精英科技有限公司 | High frequency interference-elimination type water level pre-warning system based on internet of things technology |
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