CN105648976B - Device for automatically controlling diversion of saline water - Google Patents
Device for automatically controlling diversion of saline water Download PDFInfo
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- CN105648976B CN105648976B CN201511021716.0A CN201511021716A CN105648976B CN 105648976 B CN105648976 B CN 105648976B CN 201511021716 A CN201511021716 A CN 201511021716A CN 105648976 B CN105648976 B CN 105648976B
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- chute
- gate
- motor housing
- pulley
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/02—Stream regulation, e.g. breaking up subaqueous rock, cleaning the beds of waterways, directing the water flow
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/20—Movable barrages; Lock or dry-dock gates
- E02B7/26—Vertical-lift gates
- E02B7/30—Vertical-lift gates with guide wheels or rollers for the gates
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/20—Movable barrages; Lock or dry-dock gates
- E02B7/26—Vertical-lift gates
- E02B7/36—Elevating mechanisms for vertical-lift gates
Abstract
The invention discloses a device for automatically controlling diversion of saline water. The device comprises a left diversion device body and a right diversion device body. The left diversion device body and the right diversion device body are fixedly connected and are parallel to each other. The device is fixedly installed on the cross truncation face of a river. Because the salinities of theupper layer and the lower layer in the river are different, a sensor generates different electric signals so that a motor in a left motor box and a motor in a right motor box can be driven to drive a left gate and a right gate to horizontally move up and down correspondingly, low-salinity water flows away from the position above the left gate, high-salinity water flows away from the position below the right gate, and water in different salinities can be diverted. By means of the device, when liquid in different layers is separated, the separated liquid is diverted, and the device has the beneficial effects of being simple in structure, low in manufacturing cost, fully automatic and the like.
Description
Technical field
The present invention relates to a kind of liquid separating appts, more particularly to one kind automatically controls salt water diversion device.
Background technology
The south of Xinjiang of China, day and night temperature is big, and sunshine is enriched, and annual rainfall is rare, add hypsography low-lying etc. it is various because
Element, causes that this area's saline Land is more serious, and freshwater resources are very rare, and fresh water and salt solution often occurs in deeper river
The peculiar phenomenon of layering, the upper strata for being embodied in river mostly is the fresh water that can be used directly, and lower floor is then that salinity is higher, and
Slightly pained salt solution.Under key subjects research background based on South Sinkiang water resource assignment and Salination control, for South Sinkiang river
The specific lamination of stream, it is proposed that the design concept of this patent, it is intended to by the upper strata fresh water and lower floor's salt water in the river with
A kind of low cost, efficient mode is separated, then respectively each several part water is directed to into other places, reach water resource classification process and
The purpose of efficient utilization.
The content of the invention
For the deficiencies in the prior art, the present invention provides one kind and automatically controls salt water diversion device.
In order to achieve the above object, the technical solution adopted in the present invention is as follows:One kind automatically controls salt water diversion device,
Including:First chute, the second chute, the 3rd chute, the 4th chute, first pulley, second pulley, the 3rd pulley, the 4th pulley,
Left guiding gutter, right guiding gutter, left gate, right gate, left intercepter plate, right intercepter plate, left motor housing, right motor housing, left salinity are passed
Sensor, right salinity sensor, left control circuit, right control circuit;Wherein, the two ends of the left intercepter plate are fixedly installed respectively
One chute and the second chute;Left gate locating, can be along the first chute and between the groove of the first chute and the second chute
Two chutes are slided up and down;The height and the height more than the first chute of the left intercepter plate and left gate;Left intercepter plate and Zuo Zha
The height and the height more than the first chute of door;Left guiding gutter notch upward, is vertically fixed on the top of left gate, left water conservancy diversion
Geosynclinal concave groove bottom is concordant with left gate upper surface, and left guiding gutter is used to for the liquid after separation to be directed to other places;Left motor housing is consolidated
Dingan County is mounted in the one side of left intercepter plate backwater;One end of first rope and the second rope is fixedly connected with the upper end of left gate;
First pulley be arranged on the first chute upper end groove on, the first rope tension in first pulley, the other end of the first rope
It is connected with the motor of left motor housing;Second pulley is arranged on the groove of the second chute upper end, and the second rope tension is slided second
On wheel, the other end of the second rope is connected with the motor of left motor housing;Left salinity sensor is fixed on left gate upper end upstream face
Place;Left control circuit be arranged on left motor housing in, the motor in left salinity sensor and left motor housing with left control circuit phase
Even;
The two ends of the right intercepter plate are fixedly installed respectively the 3rd chute and the 4th chute;Right gate locating is in the 3rd chute
And the 4th chute groove between, can slide up and down along the 3rd chute and the 4th chute;The height of right intercepter plate and right gate
With the height more than the 3rd chute;The height and the height more than the 3rd chute of right intercepter plate and right gate;Right guiding gutter notch
Down, the bottom of right gate is vertically fixed on, right guiding gutter groove floor is concordant with right gate lower surface, right guiding gutter is used for will
Liquid after separation is directed to other places;Right motor housing is fixedly mounted on the one side of right intercepter plate backwater;3rd rope and the 4th rope
One end of rope is fixedly connected with the upper end of right gate;3rd pulley is arranged on the groove of the 3rd chute upper end, the 3rd rope
It is stretched on the 3rd pulley, the other end of the 3rd rope is connected with the motor of right motor housing;4th pulley is arranged on the 4th chute
On the groove of upper end, on the 4th pulley, the other end of the 4th rope is connected the 4th rope tension with the motor of right motor housing;It is right
Salinity sensor is fixed at the upstream face of right gate lower end;Right control circuit be arranged on right motor housing in, right salinity sensor and
Motor in right motor housing is connected with right control circuit.
Further, the left control circuit and right control circuit include resistance R1-R13, capacitor C1-C6, inductance
L1-L2, amplifier B1-B3, bridge rectifier F1, diode D1, temperature sensor, MCU;Wherein, electric capacity C1, electric capacity C2,
One end of resistance R2 is connected with the in-phase input end of amplifier B1;The other end of resistance R1 is connected with one end of resistance R4, electricity
The other end of resistance R4 and one end of resistance R3 are connected with the inverting input of amplifier B1;The other end and resistance of resistance R6
One end of R7 is connected with the inverting input of amplifier B2;The other end of resistance R7 be connected with the output end of amplifier B2 after with
The first input end of bridge rectifier F1 is connected;The other end of resistance R2, the other end of electric capacity C2, the other end of resistance R3,
The other end of resistance R5 and the in-phase input end of amplifier B2 are connected with second input of bridge rectifier F1;Bridge-type is whole
First output end of current circuit F1 is connected respectively with one end of electric capacity C3 and one end of inductance L1, and the second of bridge rectifier F1
One end of the output end other end, one end of electric capacity C4 and resistance R9 respectively with electric capacity C3 is connected;The other end and electricity of inductance L1
The other end for holding C4 is connected with one end of resistance R8, and the other end of resistance R8 is with one end of resistance R10 with amplifier B3's
Inverting input is connected;The other end of resistance R9 and one end of resistance R11 are connected with the in-phase input end of amplifier B3;Resistance
The other end of R10 is connected respectively after being connected with the output end of amplifier B3 with one end of electric capacity C5 and one end of inductance L2;Inductance
The other end of L2 is connected respectively with one end of electric capacity C6 and one end of resistance R12;The other end of resistance R12 is negative with diode D1
It is connected with the I/O ports of MCU after being extremely connected;The other end of resistance R11, the other end of electric capacity C5, the other end of electric capacity C6 and two
The positive pole of pole pipe D1 is grounded;The power port connection external power source VCC of the temperature sensor, the numeral letter of temperature sensor
Number input/output port is connected after being connected with one end of resistance R13 with the I/O interfaces of MCU;The other end and external electrical of resistance R13
Source VCC is connected;
The output end of the amplifier B1 of the left control circuit is connected with the input of left salinity sensor, and the one of resistance R5
One end of end and resistance R6 is connected with the output end of left salinity sensor;
The output end of the amplifier B1 of the right control circuit is connected with the input of right salinity sensor, and the one of resistance R5
One end of end and resistance R6 is connected with the output end of right salinity sensor.
The invention has the beneficial effects as follows:Present configuration is simple, cheap, long service life;By the fixed peace of the present invention
Be mounted on the cross section transverse in river, by the MCU in controller can high efficiency fully automatically the water source of layering is separated,
Respectively each several part water is directed to into other places again, reach water resource classification process and efficient utilization purpose;Furthermore it is possible to clever
The living threshold value arranged in MCU, with control freedom degree is big, high precision and the features such as control accurate.
Description of the drawings
Fig. 1 is the axonometric drawing of the present invention;
Fig. 2 is the front view of the present invention;
Fig. 3 is the rear mapping of the present invention;
Fig. 4 is the left view of the present invention;
Fig. 5 is the right mapping of the present invention;
Fig. 6 is the upward view of the present invention;
Fig. 7 is the top view of the present invention;
Fig. 8 is the control circuit connection figure of the present invention;
In figure, the first chute 1, the second chute 2, the 3rd chute 3, the 4th chute 4, first pulley 5, second pulley 6, the 3rd
Pulley 7, the 4th pulley 8, left guiding gutter 9, right guiding gutter 10, left gate 11, right gate 12, left intercepter plate 13, right intercepter plate 14,
Left motor housing 15, right motor housing 16, left salinity sensor 17, right salinity sensor 18.
Specific embodiment
With reference to Figure of description and embodiment, the present invention is further illustrated.
As shown in figs. 1-7, the present invention includes:First chute 1, the second chute 2, the 3rd chute 3, the 4th chute 4, first are slided
Wheel 5, second pulley 6, the 3rd pulley 7, the 4th pulley 8, left guiding gutter 9, right guiding gutter 10, left gate 11, right gate 12, a left side are cut
Stream plate 13, right intercepter plate 14, left motor housing 15, right motor housing 16, left salinity sensor 17, right salinity sensor 18, left control
Circuit, right control circuit;Wherein, the two ends of the left intercepter plate 13 are fixedly installed respectively the first chute 1 and the second chute 2;It is left
Gate 11 is arranged between the groove of the first chute 1 and the second chute 2, can be glided along on the first chute 1 and the second chute 2
It is dynamic;The notch of left guiding gutter 9 upward, is vertically fixed on the top of left gate 11, the groove floor of left guiding gutter 9 and the upper end of left gate 11
Face is concordant, and left guiding gutter 9 is used to for the liquid after separation to be directed to other places;Left motor housing 15 is fixedly mounted on left intercepter plate 13 and carries on the back
The one side of water;One end of first rope and the second rope is fixedly connected with the upper end of left gate 11;First pulley 5 is arranged on the
On the groove of the upper end of one chute 1, the first rope tension in first pulley 5, the other end of the first rope and left motor housing 15
Motor is connected;Second pulley 6 be arranged on the upper end of the second chute 2 groove on, the second rope tension in second pulley 6, second
The other end of rope is connected with the motor of left motor housing 15;Left salinity sensor 17 is fixed at the upper end upstream face of left gate 11;
Left control circuit be arranged on left motor housing 15 in, the motor in left salinity sensor 17 and left motor housing 15 with left control circuit
It is connected;
The two ends of the right intercepter plate 14 are fixedly installed respectively the 3rd chute 3 and the 4th chute 4;Right gate 12 is arranged on
Between three chutes 3 and the groove of the 4th chute 4, can slide up and down along the 3rd chute 3 and the 4th chute 4;The groove of right guiding gutter 10
Mouth down, is vertically fixed on the bottom of right gate 12, and the groove floor of right guiding gutter 10 is concordant with the lower surface of right gate 11, right water conservancy diversion
Groove 10 is used to for the liquid after separation to be directed to other places;Right motor housing 16 is fixedly mounted on the one side of the backwater of right intercepter plate 14;The
One end of three ropes and the 4th rope is fixedly connected with the upper end of right gate 12;3rd pulley 7 is arranged on the upper end of the 3rd chute 3
Groove on, on the 3rd pulley 7, the other end of the 3rd rope is connected the 3rd rope tension with the motor of right motor housing 16;The
Four pulleys 8 are arranged on the groove of the upper end of the 4th chute 4, the 4th rope tension on the 4th pulley 8, the other end of the 4th rope
It is connected with the motor of right motor housing 16;Right salinity sensor 18 is fixed at the lower end upstream face of right gate 12;Right control circuit peace
It is mounted in right motor housing 16, the motor in right salinity sensor 18 and right motor housing 16 is connected with right control circuit;
As shown in figure 8, the left control circuit and right control circuit include resistance R1-R13, capacitor C1-C6, inductance
L1-L2, amplifier B1-B3, bridge rectifier F1, diode D1, temperature sensor, MCU;Wherein, electric capacity C1, electric capacity C2,
One end of resistance R2 is connected with the in-phase input end of amplifier B1;The other end of resistance R1 is connected with one end of resistance R4, electricity
The other end of resistance R4 and one end of resistance R3 are connected with the inverting input of amplifier B1;The other end and resistance R7 of resistance R6
One end be connected with the inverting input of amplifier B2;The other end of resistance R7 be connected with the output end of amplifier B2 after and bridge
The first input end of formula rectification circuit F1 is connected;The other end of resistance R2, the other end of electric capacity C2, the other end of resistance R3, electricity
The other end of resistance R5 and the in-phase input end of amplifier B2 are connected with second input of bridge rectifier F1;Bridge rectifier
First output end of circuit F1 is connected respectively with one end of electric capacity C3 and one end of inductance L1, and the second of bridge rectifier F1 is defeated
The one end for going out the end other end, one end of electric capacity C4 and resistance R9 respectively with electric capacity C3 is connected;The other end and electric capacity of inductance L1
The other end of C4 is connected with one end of resistance R8, and the other end of resistance R8 is anti-with amplifier B3 with one end of resistance R10
Phase input is connected;The other end of resistance R9 and one end of resistance R11 are connected with the in-phase input end of amplifier B3;Resistance
The other end of R10 is connected respectively after being connected with the output end of amplifier B3 with one end of electric capacity C5 and one end of inductance L2;Inductance
The other end of L2 is connected respectively with one end of electric capacity C6 and one end of resistance R12;The other end of resistance R12 is negative with diode D1
It is connected with the I/O ports of MCU after being extremely connected;The other end of resistance R11, the other end of electric capacity C5, the other end of electric capacity C6 and two
The positive pole of pole pipe D1 is grounded;The power port connection external power source VCC of the temperature sensor, the numeral letter of temperature sensor
Number input/output port is connected after being connected with one end of resistance R13 with the I/O interfaces of MCU;The other end and external electrical of resistance R13
Source VCC is connected;
The output end of the amplifier B1 of left control circuit is connected with the input of left salinity sensor 17, one end of resistance R5
It is connected with the output end of left salinity sensor 17 with one end of resistance R6;
The output end of the amplifier B1 of right control circuit is connected with the input of right salinity sensor 18, one end of resistance R5
It is connected with the output end of right salinity sensor 18 with one end of resistance R6.
Wherein, series connection one end of resistance R1 and electric capacity C1 connects and composes RC and goes here and there simultaneously with one end in parallel of resistance R2 and electric capacity C2
Connection frequency-selective network, both public in-phase input ends for terminating at amplifier B1, the series connection other end and electricity of resistance R1 and electric capacity C1
One end of resistance R4 is connected on the output end of amplifier B1, and the other end of resistance R4 and an end of resistance R3 are connected on the anti-phase of amplifier B1
Input, constitutes RC bridge oscillator circuits, and its effect is the exchange letter that the direct current energy of power supply is transformed into certain frequency
Number, as signal source.
The mu balanced circuit being made up of electric capacity C3, C4 and inductance L1, digital voltage is converted into by MCU by analog voltage,
The salinity of liquid is subsequently obtained according to digital voltage;The MCU can adopt the product of model MCS51, but not limited to this;Institute
Temperature sensor is stated using external power source power supply mode, the product of model DS18B20, but not limited to this can be adopted.
In fig. 8, left salinity sensor 17 and right salinity sensor 18 are represented with salinity sensor K1;This device is according to electricity
Inducing defecation by enema and suppository principle, using the cylindric copper rod material of arranged parallel as the probe of salinity sensor K1, due to salinity difference, electrical conductivity
Difference, so as to the two ends resistance value of popping one's head in is different, the change of resistance is converted to electric bridge the change of output voltage, then amplified,
Filter rectification arrives A/D chips after amplifying again, finally reads A/D conversion values by micro-control unit MCU, is computed process and calculates salt
Angle value and threshold value relatively after, drive motor carries out descending operation to left and right gate, finally by splitter box to by left and right gate
Water carry out shunting process.Oscillating circuit is used to prevent the oxidation of sensor electrode to ionize, and increases the service life.TEMP
When device prevents from measuring salinity, affected by temperature factor, improved certainty of measurement.
The course of work of the present invention is as follows:
The present invention is fixedly mounted on the cross section transverse in river;By left salinity sensor 17 and right salinity sensor 18
The salinity in detection river, because salinity is different, electrical conductivity is different, and so as to salinity sensor K1 probe resistance values are different, electric bridge will
The change of resistance is converted to the change of output voltage, and then amplified, filter rectification arrives A/D chips after amplifying again, finally by MCU
A/D conversion values are read, is computed after process calculates salinity value and threshold value relatively, controlled in left motor housing 15 and right motor housing 16
Motor work;Because left gate 11 and left salinity sensor 17 are in all the time identical level height, when left salinity sensor
When salinity sensor detects the threshold value that salinity is set less than a certain in 17, left salinity sensor 17 can motor housing 15 to the left
Go out signal, left motor housing 15 drives left gate 11 to decline certain altitude so that salinity less than certain given threshold water from Zuo Zha
The top of door 11 stream is to left guiding gutter 9.In the same manner, because right gate 12 and right salinity sensor 18 are high in identical level all the time
Degree, when right salinity sensor 18 detects the threshold value that salinity is set higher than a certain, right salinity sensor 18 can motor housing to the right
16 send signal, and right motor housing 16 drives right gate 12 to rise certain altitude, and salinity is higher than the water of certain given threshold from right gate
12 lower section streams arrive right guiding gutter 10, it is achieved thereby that the shunting of different salinity salt solution.
Claims (2)
1. one kind automatically controls salt water diversion device, it is characterised in that include:First chute (1), the second chute (2), the 3rd are slided
Groove (3), the 4th chute (4), first pulley (5), second pulley (6), the 3rd pulley (7), the 4th pulley (8), left guiding gutter
(9), right guiding gutter (10), left gate (11), right gate (12), left intercepter plate (13), right intercepter plate (14), left motor housing
(15), right motor housing (16), left salinity sensor (17), right salinity sensor (18), left control circuit, right control circuit;Its
In, the two ends of the left intercepter plate (13) are fixedly installed respectively the first chute (1) and the second chute (2);Left gate (11) is arranged
Between the groove of the first chute (1) and the second chute (2), slide up and down along the first chute (1) and the second chute (2);Institute
State the height and the height more than the first chute (1) of left intercepter plate (13) and left gate (11);Left guiding gutter (9) notch upward,
The top of left gate (11) is vertically fixed on, left guiding gutter (9) groove floor is concordant with left gate (11) upper surface, left guiding gutter
(9) for the liquid after separation to be directed to into other places;Left motor housing (15) is fixedly mounted on the one side of left intercepter plate (13) backwater;
One end of first rope and the second rope is fixedly connected with the upper end of left gate (11);First pulley (5) is slided installed in first
On the groove of groove (1) upper end, the first rope tension in first pulley (5), the other end of the first rope and left motor housing (15)
Motor be connected;On the groove of the second chute (2) upper end, the second rope tension is in second pulley (6) for second pulley (6)
On, the other end of the second rope is connected with the motor of left motor housing (15);Left salinity sensor (17) is fixed on left gate (11)
At the upstream face of upper end;Left control circuit is arranged in left motor housing (15), in left salinity sensor (17) and left motor housing (15)
Motor be connected with left control circuit;
The two ends of the right intercepter plate (14) are fixedly installed respectively the 3rd chute (3) and the 4th chute (4);Right gate (12) is arranged
Between the 3rd chute (3) and the groove of the 4th chute (4), slide up and down along the 3rd chute (3) and the 4th chute (4);It is right
The height and the height more than the 3rd chute (3) of intercepter plate (14) and right gate (12);Right guiding gutter (10) notch down, vertically
The bottom of right gate (12) is fixed on, right guiding gutter (10) groove floor is concordant with right gate (11) lower surface, right guiding gutter
(10) for the liquid after separation to be directed to into other places;Right motor housing (16) is fixedly mounted on the one of right intercepter plate (14) backwater
Face;One end of 3rd rope and the 4th rope is fixedly connected with the upper end of right gate (12);3rd pulley (7) is installed in the 3rd
On the groove of chute (3) upper end, the 3rd rope tension on the 3rd pulley (7), the other end and the right motor housing of the 3rd rope
(16) motor is connected;4th pulley (8) on the groove of the 4th chute (4) upper end, the 4th slide by the 4th rope tension
On wheel (8), the other end of the 4th rope is connected with the motor of right motor housing (16);Right salinity sensor (18) is fixed on right gate
(12) at the upstream face of lower end;Right control circuit is arranged in right motor housing (16), right salinity sensor (18) and right motor housing
(16) motor in is connected with right control circuit.
2. it is according to claim 1 to automatically control salt water diversion device, it is characterised in that the left control circuit and right control
Circuit processed includes resistance R1-R13, capacitor C1-C6, inductance L1-L2, amplifier B1-B3, bridge rectifier F1, two poles
Pipe D1, temperature sensor, MCU;Wherein, electric capacity C1, electric capacity C2, resistance R2 one end with the in-phase input end phase of amplifier B1
Even;The other end of resistance R1 is connected with one end of resistance R4, the other end of resistance R4 and one end of resistance R3 with amplifier B1
Inverting input be connected;The other end of resistance R6 and one end of resistance R7 are connected with the inverting input of amplifier B2;Electricity
The other end of resistance R7 is connected after being connected with the output end of amplifier B2 with the first input end of bridge rectifier F1;Resistance R2's
The in-phase input end of the other end, the other end of electric capacity C2, the other end of resistance R3, the other end of resistance R5 and amplifier B2 with
Second input of bridge rectifier F1 is connected;First output end of bridge rectifier F1 respectively with one end of electric capacity C3 and
One end of inductance L1 is connected, second output end of the bridge rectifier F1 other end, one end of electric capacity C4 respectively with electric capacity C3
It is connected with one end of resistance R9;The other end of inductance L1 and the other end of electric capacity C4 are connected with one end of resistance R8, resistance R8
The other end be connected with the inverting input of amplifier B3 with one end of resistance R10;The other end of resistance R9 and resistance R11's
One end is connected with the in-phase input end of amplifier B3;The other end of resistance R10 is distinguished after being connected with the output end of amplifier B3
It is connected with one end of electric capacity C5 and one end of inductance L2;The other end of inductance L2 respectively with one end of electric capacity C6 and resistance R12
One end is connected;The other end of resistance R12 is connected after being connected with the negative pole of diode D1 with the I/O ports of MCU;Resistance R11's is another
The positive pole of one end, the other end of electric capacity C5, the other end of electric capacity C6 and diode D1 is grounded;The power supply of the temperature sensor
Port connects external power source VCC, the data signal input/output port of temperature sensor be connected with one end of resistance R13 afterwards and
The I/O interfaces of MCU are connected;The other end of resistance R13 is connected with external power source VCC;
The output end of the amplifier B1 of the left control circuit is connected with the input of left salinity sensor (17), and the one of resistance R5
One end of end and resistance R6 is connected with the output end of left salinity sensor (17);
The output end of the amplifier B1 of the right control circuit is connected with the input of right salinity sensor (18), and the one of resistance R5
One end of end and resistance R6 is connected with the output end of right salinity sensor (18).
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---|---|---|---|---|
GB601283A (en) * | 1945-10-31 | 1948-05-03 | Frederick William Rowbotham | Improvements in, or relating to, sluice gates and the like |
CN201158814Y (en) * | 2007-09-19 | 2008-12-03 | 中国水电顾问集团成都勘测设计研究院 | Layered water drawing structure |
CN102121240A (en) * | 2010-12-23 | 2011-07-13 | 倪既民 | Mobile adjustable river self-flowing silt scouring guide plate |
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