CN107238689A - Wireless detecting system is used in sewage treatment process - Google Patents
Wireless detecting system is used in sewage treatment process Download PDFInfo
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- CN107238689A CN107238689A CN201710606846.3A CN201710606846A CN107238689A CN 107238689 A CN107238689 A CN 107238689A CN 201710606846 A CN201710606846 A CN 201710606846A CN 107238689 A CN107238689 A CN 107238689A
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- 239000010865 sewage Substances 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000005540 biological transmission Effects 0.000 claims abstract description 15
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 230000006978 adaptation Effects 0.000 claims abstract description 10
- 238000012544 monitoring process Methods 0.000 claims abstract description 9
- 239000003990 capacitor Substances 0.000 claims description 25
- 238000001914 filtration Methods 0.000 claims description 14
- 230000005611 electricity Effects 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 description 4
- 230000002459 sustained effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from DC input or output
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
- H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
- H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Medicinal Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Food Science & Technology (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Computer Networks & Wireless Communication (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention provides in a kind of sewage treatment process use wireless detecting system, including：Gather CPU；Sewage detection equipment, its output end is connected with gathering CPU input；Radio transmission apparatus, collection CPU output end is connected with radio transmission apparatus, and radio transmission apparatus is used to be wirelessly connected to remote monitoring system；And dc source power supply circuit, it includes：For mains 220v to be converted to direct current 12v power adaptation unit, the switching power supply for direct current 12v to be changed into direct current 5v, common mode inductance and linear power supply unit for direct current 5v to be changed into direct current 3.3v.The problem of with wireless detecting system solving that remote monitoring can not be realized in the prior art in the sewage treatment process.
Description
Technical field
The present invention relates to sewage treatment area, and in particular to uses wireless detecting system in a kind of sewage treatment process.
Background technology
Sewage disposal concerns the eco-environment resource that people depend on for existence, is that country implements energy-saving and emission-reduction strategy, accelerated
Cultivation and development emerging strategic industries, the construction scale and service range of wastewater treatment in China industry will further expand.Sewage
Processing construction market and operation market enter high-speed development period, and industrial integration progressively deploys, and Market of Sewage Water Treatment reform will enter
One step is promoted, and sewage disposal investment operation market has the wide market space.
In whole sewage treatment area, include the sewage treatment plant of centralization, in addition also have each Enterprise Construction
Treatment tank, while also there is construction integrated sewage disposal facility in rural field.And sewage disposal includes various differences
Handling process, application field and link are all relatively complicated.
From the point of view of the state-of-art of whole industry, sewage treatment process is more and more ripe, also plays very well
Treatment effect, what is applied in sewage treatment process is to be provided with sewage disposal device, sewage disposal device for examining
The detection devices such as the PH detection sensors for the treatment of sewage are surveyed, but although can know that each is detected by each detection device
Value, detection device is only capable of observing each Testing index at sewage disposal device with to dirt only at sewage disposal device
Water treatment facilities are monitored, but this brings great inconvenience to monitoring work, then how to realize remote monitoring is urgently
The problem of processing.
The content of the invention
The invention provides wireless detecting system is used in a kind of sewage treatment process, solution can not be realized remote in the prior art
The problem of range monitoring.
To achieve the above object, present invention employs following technical scheme：
Wireless detecting system is used in a kind of sewage treatment process, including：Gather CPU；Sewage detection equipment, its output end with
Gather CPU input connection；Radio transmission apparatus, collection CPU output end is connected with radio transmission apparatus, is wirelessly transferred and is set
It is ready for use on and is wirelessly connected to remote monitoring system；And dc source power supply circuit, it includes：For mains 220v to be turned
Be changed to direct current 12v power adaptation unit, the switching power supply for direct current 12v to be changed into direct current 5v, common mode inductance with
And for direct current 5v to be changed into direct current 3.3v linear power supply unit, the electrode input end and power adaptation of switching power supply
The cathode output end connection of unit, the negative input of switching power supply is connected with the cathode output end of power adaptation unit,
The cathode output end of switching power supply connects the electrode input end of common mode inductance, the cathode output end connection of switching power supply
The negative input of common mode inductance, the cathode output end of common mode inductance connects the electrode input end of linear power subsystem, common mode electricity
The cathode output end ground connection of sense, the cathode output end of common mode inductance is used for the power end and sewage detection equipment for collection CPU
Power end power, the cathode output end of linear power supply unit is used to power for the power end of radio transmission apparatus.
Preferably, switching power supply includes：First PWM converter, the VIN ends of the first PWM converter are switch electricity
The electrode input end of source unit, the GND ends of the first PWM converter are the negative input of switching power supply, the first PWM conversions
The GND ends ground connection of device, the GND ends of the first PWM converter are the cathode output end of switching power supply；Voltage-regulator diode, voltage stabilizing
The anode of diode is connected with the GND ends of the first PWM converter, the VIN ends of the negative electrode of voltage-regulator diode and the first PWM converter
Connection；First filtration module, it includes the first filter capacitor, the second filter capacitor and the 3rd filter capacitor, the first filtered electrical
The positive pole of the positive pole of appearance, the positive pole of the second filter capacitor and the 3rd filter capacitor connects with the VIN ends of the first PWM converter
Connect, the negative pole of the negative pole of the first filter capacitor, the negative pole of the second filter capacitor and the 3rd filter capacitor is changed with the first PWM
The GND ends connection of device；And division module, it includes first resistor, second resistance and 3rd resistor, and first resistor one end is equal
It is connected with the BOOT ends of the first PWM converter, the first resistor other end is connected with second resistance and 3rd resistor one end, second
Resistance and the 3rd resistor other end are grounded.
Preferably, switching power supply also includes：4th electric capacity, the 4th capacitance cathode and the first PWM converter
BOOT ends are connected and the 4th electric capacity negative pole is connected with first resistor, and the 4th electric capacity negative pole is connected with the PH ends of the first PWM converter.
Preferably, switching power supply also includes：Fly-wheel diode, the plus earth of fly-wheel diode, the pole of afterflow two
The 4th electric capacity negative pole connection of the negative electrode of pipe.
Preferably, switching power supply also includes：Second filtration module, the second filtration module include ordinary inductor and
5th electric capacity, the positive pole of ordinary inductor is connected with the 4th electric capacity negative pole, negative pole and the first resistor not connected second of ordinary inductor
The end connection of resistance, the positive pole of the 5th electric capacity and the negative pole of ordinary inductor are connected, the negative pole ground connection of the 5th electric capacity.
Preferably, switching power supply also includes：6th electric capacity, the positive pole of the 6th electric capacity and the negative pole of ordinary inductor connect
Connect, the negative pole ground connection of the 6th electric capacity.
Preferably, switching power supply also includes：7th electric capacity and the 8th electric capacity, the 7th capacitance cathode and common electricity
The negative pole connection of sense, the 7th electric capacity negative pole is connected with the node of first resistor and second resistance, the positive pole and first of the 8th electric capacity
Resistance and the connection of the node of second resistance, the negative pole ground connection of the 8th electric capacity, the node of first resistor and second resistance are connected to the
The VSNS ends of one PWM converter.
Preferably, linear power supply unit include the second PWM converter, the 9th electric capacity, the tenth electric capacity, the 11st electric capacity with
And the 12nd electric capacity, the VIN ends of the second PWM converter are the electrode input end of linear power supply unit, the second PWM converter
VOUT ends are the cathode output end of linear power supply unit, and the positive pole of the 9th electric capacity and the positive pole of the tenth electric capacity are all connected with the 2nd PWM
The VIN ends of converter, the negative pole of the 9th electric capacity and the negative pole of the tenth electric capacity are grounded, the positive pole of the 11st electric capacity and the 12nd electricity
The positive pole of appearance is all connected with the VOUT ends of the second PWM converter, and the negative pole of the 11st electric capacity and the negative pole of the 12nd electric capacity are grounded.
Compared to prior art, the present invention has the advantages that：
Sewage detection equipment is used to detect pH value and temperature for the treatment of sewage etc. when sewage disposal device handles sewage；
By setting collection CPU and radio transmission apparatus, realize the indices for detecting sewage detection equipment and pass to far
Range monitoring system, realizes the long-range running according to real-time Testing index control sewage disposal device, can also realize urgent feelings
Condition processing etc.；By setting common mode inductance, it is to avoid common mode interference signal is inputted to switching power supply to linear power supply unit
Voltage signal interference, both realized to linear power supply unit input standard 5v voltages, also achieve and set to sewage detection
Standby and collection CPU inputs the 5v voltages of standard.
Brief description of the drawings
Fig. 1 is the circuit block diagram in sewage treatment process with wireless detecting system；
Fig. 2 is the circuit theory diagrams of switching power supply and common mode inductance；
Fig. 3 is the circuit theory diagrams of linear power supply unit.
Embodiment
As shown in figure 1, the present invention, which is proposed, uses wireless detecting system in a kind of sewage treatment process, including：Gather CPU1；
Sewage detection equipment 2, its output end is connected with gathering CPU1 input；Radio transmission apparatus 3, gather CPU1 output end with
Radio transmission apparatus 3 is connected, and radio transmission apparatus 3 is used to be wirelessly connected to remote monitoring system；And dc source is powered electricity
Road 4, it includes：For mains 220v to be converted to direct current 12v power adaptation unit, for direct current 12v to be changed into
Direct current 5v switching power supply, common mode inductance L1 and the linear power supply unit for direct current 5v to be changed into direct current 3.3v,
The electrode input end of switching power supply is connected with the cathode output end of power adaptation unit, the negative pole input of switching power supply
End is connected with the cathode output end of power adaptation unit, the cathode output end connection common mode inductance L1 of switching power supply positive pole
Input, the cathode output end connection common mode inductance L1 of switching power supply negative input, common mode inductance L1 positive pole is defeated
Go out the electrode input end of the linear power subsystem of end connection, common mode inductance L1 cathode output end ground connection, common mode inductance L1 positive pole
Output end is used to be that collection CPU1 power end and the power end of sewage detection equipment 2 are powered, the positive pole of linear power supply unit
Output end is used to power for the power end of radio transmission apparatus 3.Wherein common mode inductance L1 uses ZJYS51R5-2PB-01 models.
For the simple and easy to use switching power supply of design structure, switching power supply includes：First PWM is changed
Device U1, the first PWM converter U1 VIN ends are the electrode input end of switching power supply, the first PWM converter U1 GND ends
For the negative input of switching power supply, the first PWM converter U1 GND ends are grounded, the first PWM converter U1 GND ends
For the cathode output end of switching power supply；Voltage-regulator diode D1, voltage-regulator diode D1 anode and the first PWM converter U1's
GND ends are connected, and voltage-regulator diode D1 negative electrode is connected with the first PWM converter U1 VIN ends；First filtration module, it includes
First filter capacitor C1, the second filter capacitor C2 and the 3rd filter capacitor C3, the first filter capacitor C1 positive pole, the second filtering
VIN end of electric capacity C2 positive pole and the 3rd filter capacitor the C3 positive pole with the first PWM converter U1 is connected, the first filtered electrical
Hold the C1 negative pole of negative pole, the second filter capacitor C2 negative pole and the 3rd filter capacitor C3 with the first PWM converter U1's
GND ends are connected；And division module, it includes first resistor R1, second resistance R2 and 3rd resistor R3, first resistor R1 mono-
Hold BOOT ends with the first PWM converter U1 to be connected, the first resistor R1 other ends with second resistance R2 and 3rd resistor R3
One end is connected, and second resistance R2 and the 3rd resistor R3 other ends are grounded.First PWM converter U1 uses TPS5430DDA types
Number.By setting voltage-regulator diode D1, prevent the power supply inputted to the first PWM converter U1 from larger fluctuation occur and causing to burn out
Chip；First filtration module uses three-level capacitor filtering, and it is standard 12v voltages to realize to the first PWM converter U1 inputs.
Switching power supply also includes：4th electric capacity C4, the 4th electric capacity C4 positive poles and the first PWM converter U1 BOOT ends
Connect and the 4th electric capacity C4 negative poles are connected with first resistor R1, the 4th electric capacity C4 negative poles and the first PWM converter U1 PH ends connect
Connect.4th electric capacity C4 is 0.01uF electric capacity, using the charge and discharge effect of electric capacity, gives the first PWM converter U1 and constantly starts
Power supply, it is ensured that the first PWM converter U1 normal startup.
Switching power supply also includes：Sustained diode 2, the plus earth of sustained diode 2, sustained diode 2
The 4th electric capacity C4 negative poles connection of negative electrode.Sustained diode 2 is used for protection element and is not induced voltage breakdown or burns out, with simultaneously
The mode of connection is connected to the element two ends for producing induced electromotive force, and formed loop, makes the high electromotive force that it is produced in loop
Consumed with continuous current system, so that the element played a part of in protection circuit is not damaged by.
Switching power supply also includes：Second filtration module, the second filtration module includes the electricity of ordinary inductor L2 and the 5th
Hold C5, ordinary inductor L2 positive pole is connected with the 4th electric capacity C4 negative poles, ordinary inductor L2 negative pole and first resistor R1 are not connected with
Second resistance R2 end connection, the 5th electric capacity C5 positive pole is connected with ordinary inductor L2 negative pole, and the 5th electric capacity C5 negative pole connects
Ground.Second filtration module is LC filter circuits, and the stable output and ripple for realizing electric current are filtered out.
Switching power supply also includes：6th electric capacity C6, the 6th electric capacity C6 positive pole is connected with ordinary inductor L2 negative pole,
6th electric capacity C6 negative pole ground connection.6th electric capacity C6 is used to filter out high frequency ripple.
Switching power supply also includes：7th electric capacity C7 and the 8th electric capacity C8, the 7th electric capacity C7 positive poles and ordinary inductor
L2 negative pole connection, the 7th electric capacity C7 negative poles are connected with first resistor R1 and second resistance R2 node, and the 8th electric capacity C8 is just
Pole is connected with first resistor R1 and second resistance R2 node, the 8th electric capacity C8 negative pole ground connection, the electricity of first resistor R1 and second
Resistance R2 node is connected to the first PWM converter U1 VSNS ends.Due to electric at first resistor R1 and second resistance R2 node
Pressure is, to the first PWM converter U1 input feedback voltages, by the 7th electric capacity C7 and the 8th electric capacity C8 setting, to realize
To the ripple interference filtering of the first PWM converter U1 input feedback voltages.
Linear power supply unit includes the second PWM converter U2, the 9th electric capacity C9, the tenth electric capacity C10, the 11st electric capacity C11
And the electrode input end that the 12nd electric capacity C12, the second PWM converter U2 VIN ends are linear power supply unit, the 2nd PWM turns
Parallel operation U2 VOUT ends are the cathode output end of linear power supply unit, the 9th electric capacity C9 positive pole and the tenth electric capacity C10 positive pole
The second PWM converter U2 VIN ends are all connected with, the 9th electric capacity C9 negative pole and the tenth electric capacity C10 negative pole are grounded, the 11st
Electric capacity C11 positive pole and the 12nd electric capacity C12 positive pole are all connected with the second PWM converter U2 VOUT ends, the 11st electric capacity C11
Negative pole and the 12nd electric capacity C12 negative pole be grounded.Second PWM converter U2 models AMS1117-3.3V.9th electric capacity
C9 and the tenth electric capacity C10 filter out input nonlinearities of the high and low frequency to the second PWM converter U2 VIN ends.11st electric capacity C11
Avoid high and low frequency from exporting the second PWM converter U2 VOUT ends with the 12nd electric capacity C12 to disturb.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although with reference to compared with
The present invention is described in detail good embodiment, it will be understood by those within the art that, can be to skill of the invention
Art scheme is modified or equivalent substitution, and without departing from the objective and scope of technical solution of the present invention, it all should cover at this
Among the right of invention.
Claims (8)
1. wireless detecting system is used in a kind of sewage treatment process, it is characterised in that including：
Gather CPU；
Sewage detection equipment, its output end is connected with gathering CPU input；
Radio transmission apparatus, collection CPU output end is connected with radio transmission apparatus, and radio transmission apparatus is used to be wirelessly connected to
Remote monitoring system；And
Dc source power supply circuit, it includes：For mains 220v to be converted to direct current 12v power adaptation unit, is used
In direct current 12v being changed into direct current 5v switching power supply, common mode inductance and for direct current 5v to be changed into direct current 3.3v
Linear power supply unit, the electrode input end of switching power supply is connected with the cathode output end of power adaptation unit, switch electricity
The negative input of source unit is connected with the cathode output end of power adaptation unit, the cathode output end connection of switching power supply
The electrode input end of common mode inductance, the cathode output end of switching power supply connects the negative input of common mode inductance, common mode electricity
The cathode output end of sense connects the electrode input end of linear power subsystem, the cathode output end ground connection of common mode inductance, common mode inductance
Cathode output end be used to power for collection CPU power end and the power end of sewage detection equipment, linear power supply unit
Cathode output end is used to power for the power end of radio transmission apparatus.
2. wireless detecting system is used in sewage treatment process according to claim 1, it is characterised in that switching power supply
Including：
First PWM converter, the VIN ends of the first PWM converter are the electrode input end of switching power supply, the first PWM conversions
The GND ends of device are the negative input of switching power supply, and the GND ends of the first PWM converter are grounded, the first PWM converter
GND ends are the cathode output end of switching power supply；
Voltage-regulator diode, the anode of voltage-regulator diode is connected with the GND ends of the first PWM converter, the negative electrode of voltage-regulator diode with
The VIN ends connection of first PWM converter；
First filtration module, it includes the first filter capacitor, the second filter capacitor and the 3rd filter capacitor, the first filter capacitor
Positive pole, the positive pole of the positive pole of the second filter capacitor and the 3rd filter capacitor be connected with the VIN ends of the first PWM converter,
The negative pole of the negative pole of first filter capacitor, the negative pole of the second filter capacitor and the 3rd filter capacitor with the first PWM converter
GND ends connection；And
Division module, it includes first resistor, second resistance and 3rd resistor, and first resistor one end is changed with the first PWM
The BOOT ends connection of device, the first resistor other end is connected with second resistance and 3rd resistor one end, second resistance and the 3rd electricity
The resistance other end is grounded.
3. wireless detecting system is used in sewage treatment process according to claim 2, it is characterised in that switching power supply
Also include：4th electric capacity, the 4th capacitance cathode is connected and the 4th electric capacity negative pole and the first electricity with the BOOT ends of the first PWM converter
Resistance connection, the 4th electric capacity negative pole is connected with the PH ends of the first PWM converter.
4. wireless detecting system is used in sewage treatment process according to claim 3, it is characterised in that switching power supply
Also include：Fly-wheel diode, the plus earth of fly-wheel diode, the 4th electric capacity negative pole connection of the negative electrode of fly-wheel diode.
5. wireless detecting system is used in sewage treatment process according to claim 4, it is characterised in that switching power supply
Also include：Second filtration module, the second filtration module includes ordinary inductor and the 5th electric capacity, the positive pole of ordinary inductor and the 4th
Electric capacity negative pole is connected, and the end that the negative pole of ordinary inductor is not connected with second resistance with first resistor is connected, the positive pole of the 5th electric capacity and
The negative pole connection of ordinary inductor, the negative pole ground connection of the 5th electric capacity.
6. wireless detecting system is used in sewage treatment process according to claim 5, it is characterised in that switching power supply
Also include：6th electric capacity, the positive pole of the 6th electric capacity and the negative pole of ordinary inductor are connected, the negative pole ground connection of the 6th electric capacity.
7. wireless detecting system is used in sewage treatment process according to claim 6, it is characterised in that switching power supply
Also include：The negative pole connection of 7th electric capacity and the 8th electric capacity, the 7th capacitance cathode and ordinary inductor, the 7th electric capacity negative pole and the
One resistance and the connection of the node of second resistance, the positive pole of the 8th electric capacity are connected with the node of first resistor and second resistance, and the 8th
The node of the negative pole ground connection of electric capacity, first resistor and second resistance is connected to the VSNS ends of the first PWM converter.
8. use wireless detecting system according in any described sewage treatment process of claim 1 to 7, it is characterised in that linear
Power subsystem includes the second PWM converter, the 9th electric capacity, the tenth electric capacity, the 11st electric capacity and the 12nd electric capacity, the 2nd PWM
The VIN ends of converter are the electrode input end of linear power supply unit, and the VOUT ends of the second PWM converter are linear power supply unit
Cathode output end, the positive pole of the 9th electric capacity and the positive pole of the tenth electric capacity are all connected with the VIN ends of the second PWM converter, the 9th electric capacity
Negative pole and the negative pole of the tenth electric capacity be grounded, the positive pole of the 11st electric capacity and the positive pole of the 12nd electric capacity are all connected with the 2nd PWM
The VOUT ends of converter, the negative pole of the 11st electric capacity and the negative pole of the 12nd electric capacity are grounded.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710606846.3A CN107238689A (en) | 2017-07-24 | 2017-07-24 | Wireless detecting system is used in sewage treatment process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710606846.3A CN107238689A (en) | 2017-07-24 | 2017-07-24 | Wireless detecting system is used in sewage treatment process |
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