CN102616989A - Novel rural domestic sewage treatment system control device and application thereof - Google Patents
Novel rural domestic sewage treatment system control device and application thereof Download PDFInfo
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- CN102616989A CN102616989A CN201210081392XA CN201210081392A CN102616989A CN 102616989 A CN102616989 A CN 102616989A CN 201210081392X A CN201210081392X A CN 201210081392XA CN 201210081392 A CN201210081392 A CN 201210081392A CN 102616989 A CN102616989 A CN 102616989A
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Abstract
The invention discloses a novel rural domestic sewage treatment system control device and an application thereof. The device provides a measured value correcting algorithm based on a statistical property and a control technology of variable segmented threshold values and time-share and quarterly threshold values. Namely that, a measured value is treated by initial multiple-valued averaging, operation weighted averaging and de-noising to improve the measurement precision of parameters; a motor control strategy of different variable segmented threshold values and time-share and quarterly threshold values is applied to fine control of motors with different applications; a network interface and a video interface are introduced to provide supports to network management and video monitoring, so that the quality the rural domestic sewage treatment is greatly improved; and meanwhile, the electric energy can be reduced, and the construction cost and the operation cost are reduced.
Description
Technical field
The present invention relates to a kind of new village sanitary sewage disposal Electrical Control Technology, specifically the domestic sewage in rural areas by using treatment system intelligent control technology under the FUSION WITH MULTISENSOR DETECTION.
Background technology
The environmental pollution serious harm that domestic sewage in rural areas by using causes is to the survival and development in rural area; How effectively to handle domestic sewage in rural areas by using and become the urgent problem that solves of environmental administrations at different levels; But the discharging characteristics of country sewage are different from the city; People in the countryside density is little, and is sparsely populated, is unfavorable for focusing on of sewage.Therefore, domestic domestic sewage in rural areas by using is handled and is adopted generally at present that dispersant type domestic wastewater system, this Sewage treatment systems are conceived to ecology, investment is little, running cost is low, for a science, economic, practical feasible road have been opened up in the domestic sewage in rural areas by using processing.The advantage that yet this investment is little, running cost is low is to be based upon on the little basis of system; A small-sized domestic sewage in rural areas by using treatment system generally only is used for the sanitary sewage disposal of an administrative village; If solve the problem that domestic sewage in rural areas by using is handled comprehensively; Then need each administrative village to build so small-sized domestic sewage in rural areas by using treatment system, therefore, how can make each mini system realize efficient, the energy-conservation technological focus that become.Realize that efficient, energy-conservation effective way is exactly to adopt advanced person, science, intelligence, system control device simple in structure; The level of gear design directly has influence on the quality that domestic sewage in rural areas by using is handled; Have influence on the cost and the construction cost of system's operation, have influence on effective utilization of power source.
Summary of the invention
For improving the rough formula control of current domestic sewage in rural areas by using treatment system gear; Achieve efficient, the Energy Saving Control of essence, the present invention provides a kind of observed value correction algorithm and a kind of segmentation threshold values and timesharing based on statistical character, divides the season threshold values variable control techniques.Promptly; Observed value is improved the measuring accuracy of parameter through initial many-valued average, operation weighted mean and denoising; Different segmentation threshold values and timesharing, the variable motor control strategy of branch season threshold values are used for the meticulous control of different purposes motors; And to introduce network interface be that network management and video monitoring provide support with video interface, is greatly enhanced with this quality that domestic sewage in rural areas by using is handled, and the while can also saves energy, reduction running cost and construction cost.
Domestic sewage processing system gear provided by the invention comprises transmitter, sampling resistor, voltage follower, A/D change-over circuit, ARM9 treater and electrode; The current signal i of transmitter output
InThrough output voltage numeral amount V behind sampling resistor, voltage follower, the A/D change-over circuit
In, V
InPass through I
2C interface is transferred to the ARM9 treater; The work of ARM9 output signal control lift pump, sludge reflux pump, aerator motor.
Principle of work of the present invention is: the ARM9 treater reads earlier 50 voltage digital amount V after the conversion continuously when start
In, calculate first observed value V of its statistical average value as system
Out(0); Thereafter the voltage digital amount V that at every turn records
InAt first with last observed value V
Out(j) relatively, if V
InDepart from greater than 10%, then be judged to be undesired signal, directly ignore this observed value, if V
InDepart from less than 10%, then observed value V last time
Out(j) take advantage of in weight 90% and this voltage digital amount V that records
InTake advantage of in weight 10% as this observed value V
Out(j+1) output; Again observed value is passed through calibration algorithm with V afterwards
Out(j+1) remove in corresponding correction scale-up factor k
p, add drift correction amount δ, obtain the actual value of DO, ORP, PH, temperature and liquid level respectively, the actual value of output is as the input signal of measuring demonstration and electric machine control.
On sensor electrode, add precision resistance, convert current signal into voltage signal,, eliminate the influence of input resistance measuring through before the A/D conversion, adding voltage follower.The characteristics of utilizing domestic sewage in rural areas by using detected value (DO, ORP, PH, temperature) slowly to change in time adopt absolute bias determining device, for sampled value depart from average the sampled value of big (getting 10% here) do deletion and handle.Initial measurement is got statistical average value with continuous 50 times observed value, as first observed value, thereby effectively eliminates unstable, the unstable measuring error that causes of circuit of start moment transmitter.At normal operation period, adopt the weighted mean formula that output voltage values is revised, that is, the weight of the observed value of revising last time is 90%, and the weight of current efficiently sampling value has only 10%, thus reduce the influence of error current to voltage measurements.Obtain the true value of actual detected parameter (DO, ORP, PH, temperature) at last through the demarcation of observed value, provide liquid crystal display to show, and send to server, be permanently stored in the DB through network.
The demarcation of measured parameter and correction adopt touch-screen to realize, increase or reduce scale-up factor and side-play amount through step-lengths such as touch-screens, adopt demarcation and correction formula that the magnitude of voltage that records is converted into actual observed value.Simultaneously scale-up factor and side-play amount are saved in the flash memory, and send to server through network.
Lift pump, sludge reflux pump and aerator electric machine control will adopt threshold values (or segmentation threshold values) and timesharing up and down, divide the season threshold values variable control method; Timesharing, branch season characteristic according to the domestic sewage in rural areas by using discharging; The time threshold values control strategy that becomes of formulation science; Tabling look-up through current date and time obtains seasonal factors and period coefficient, calculates threshold values (or segmentation threshold values) up and down more respectively, and threshold values control is through threshold values determining device stepped control rotating speed of motor and start-stop.
Use domestic sewage processing system gear provided by the invention reducing the transmitter requirement, reduce under the prerequisite of equipment input cost, still can guarantee the measuring accuracy of each measured parameter; Algorithm refined control mode makes system's construction cost low through adopting simple in structure to topworks, system's operation more efficiently, more energy-conservation.
Description of drawings
Below in conjunction with an embodiment shown in the drawings the present invention is further specified.
Accompanying drawing 1 domestic sewage in rural areas by using treatment system control block diagram.
1.1 be (DO, ORP, PH, temperature) transmitter, the 1.2nd, sampling resistor, the 1.3rd, voltage follower; 1.4 be the A/D change-over circuit, the 1.5th, initial mean algorithm, the 1.6th, denoise algorithm; 1.7 be the weighted mean algorithm, the 1.8th, touch-screen, the 1.9th, measure and demarcate correction algorithm; 1.10 be the electric machine control algorithm, the 1.11st, motor-drive circuit, the 1.12nd, topworks's motor.
Accompanying drawing 2 observed value scaling method block diagrams.
2.1 touch-screen is used in the demarcation and the correction that are parameter, and the 2.2nd, scale-up factor stepping keypress function, the 2.3rd, side-play amount stepping keypress function, the 2.4th, demarcate and correction algorithm
Accompanying drawing 3 lift pumps and sludge reflux pump motor control strategy block diagram.
3.1 be seasonal factors and period coefficient table, the 3.2nd, threshold values algorithm up and down, the 3.3rd, threshold values determining device, the 3.4th, motor-drive circuit, the 3.5th, sewage pump or sludge reflux pump motor.
Accompanying drawing 4 aerator motor control strategy block diagrams.
4.1 be seasonal factors and period coefficient table, the 4.2nd, segmentation threshold values computational algorithm, the 4.3rd, segmentation threshold values determining device, the 4.4th, motor-drive circuit, the 4.5th, aerator motor.
Accompanying drawing 5 country sewage processing technological flow figure.
5.1 be grating tank, the 5.2nd, anaerobic pond, ORP, PH, temperature and liquid level sensor are installed in the anaerobic pond; 5.3 be biological contact oxidation pond, DO transmitter and aeration pump are installed in the oxidation pond, and the 5.4th, settling tank; Sludge reflux pump is installed in the settling tank, and the 5.5th, multistage worry bed is strengthened person who lives in exile worker's wetland, the 5.6th, sewage pump; 5.7 be jet aerator, the 5.8th, sludge reflux pump.
Accompanying drawing 6 gear hardware block diagrams.
6.1 be that (ORP, PH, DO, temperature and liquid level) transmitter 6.2 is I/V translation circuits, the 6.3rd, voltage follower circuit, the 6.4th, A/D change-over circuit; 6.5 be touch-screen, the 6.6th, flash memory, the 6.7th, network interface; 6.8 be video interface, the 6.9th, ARM9 treater, the 6.10th, motor-drive circuit; 6.11 be sewage pump, the 6.12nd, jet-flow aeration pump, the 6.13rd, sludge reflux pump.
Accompanying drawing 7 voltage follows and A/D change-over circuit.
R01 is 250 Europe precision resistances, and LM324 is an operational amplifier, and AD1100AI is band I
2The A/D converter of C, R02 and R03 are pull-up resistors, SCL and SDA are respectively I
2The clock end of C and data terminal.
Accompanying drawing 8 video interface circuits.
SAA7113 is a video decoding chip; It can import 2 road analog video signals, can change 2 tunnel inputs through the difference configuration of internal register, and C33, C34, C35, C36, C37, C38 are partiting dc capacitors; R66, R67 are pull-up resistors, and other device is the standard configuration device.
Accompanying drawing 9 network interface circuits.
DM9000 is fully-integrated and cost-effective single-chip Fast Ethernet mac controller, and SD0-SD15 16 is DB, and X6 is the 25M crystal oscillator, and C31, C32 are the load capacitances of crystal oscillator, and other device is the standard configuration device.
Embodiment
In the control of the domestic sewage in rural areas by using treatment system shown in the accompanying drawing 1 block diagram: with the current signal i of various kinds of sensors output
InBe converted into voltage signal through sampling resistor, again through output voltage numeral amount V behind voltage follower, the A/D change-over circuit
In, through I
2C exports to the ARM9 microprocessor; The ARM9 microprocessor reads 50 observed values earlier continuously when start, calculate first observed value V of its statistical average value as system
Out(0); Thereafter the voltage digital amount V that at every turn records
InAt first compare,, then be judged to undesired signal, do not calculate new observed value, if depart from, then observed value V last time less than 10% if depart from greater than 10% with last observed value
Out(j) take advantage of in weight 90% and this voltage digital amount V that records
InTake advantage of in weight 10% as this observed value V
Out(j+1) export, obtain the actual value of DO, ORP, PH, temperature and liquid level respectively, the actual value of output is as the input signal of measuring demonstration and electric machine control.Electric machine control will adopt segmentation threshold values and timesharing, divide the season threshold values variable threshold values control method; The threshold values that arrives according to respective algorithms; The speed and the start-stop of control motor; The assignment procedure of its threshold values is accomplished through network interface by upper computer, and its set(ting)value is kept in the flash memory of DB and lower computer of upper computer simultaneously; Network interface is also realized the controlled variable and the control strategy of uploading and receive the upper computer download in real time of take off data, failure message through 3G or Wi-Fi; Device also provides video interface, is used for the live video monitoring.
In the observed value scaling method block diagram shown in control block diagram of the domestic sewage in rural areas by using treatment system shown in the accompanying drawing 1 and the accompanying drawing 2: adopt touch-screen to realize the demarcation and the correction of measured parameter; Earlier several calibration values are measured; Show and write down the magnitude of voltage and the standard value of measured parameter, calculate corresponding scale-up factor k
pAnd offset delta, import revised scale-up factor k through touch-screen
pAnd offset delta, adopt and demarcate and correction formula y=V
Out(j)/k
p+ δ is converted into the observed value of actual measured parameter with the magnitude of voltage that records, and shows and the input signal of electric machine control as measuring.Simultaneously with scale-up factor k
pBe saved in the flash memory with offset delta, and send to server through network.
In the domestic sewage in rural areas by using treatment system shown in the accompanying drawing 1 control block diagram and lift pump shown in the accompanying drawing 3 and sludge reflux pump motor control strategy block diagram: through reading system current date and time, the employing look-up table obtains seasonal factors k
DWith the period coefficient k
T, adopt the corresponding calculated formula to calculate threshold values y more respectively
hWith following threshold values y
lFor sludge reflux pump, as actual measured value y＞y
hThe Shi Qidong drive-motor is as actual measured value y＜y
lThe time stop motor operation; For lift pump, as actual measured value y＜y
lThe Shi Qidong drive-motor is as actual measured value y＞y
hThe time stop motor operation.
In the domestic sewage in rural areas by using treatment system shown in the accompanying drawing 1 control block diagram and the aerator motor control strategy block diagram shown in the accompanying drawing 4: through reading system current date and time, the employing look-up table obtains seasonal factors k
DWith the period coefficient k
T, calculate segmentation threshold values y more respectively
h, y
3, y
2And y
l,, as actual measured value y＞y
hThe time stop motor operation, work as y
h＞actual measured value y＞y
3The time motor move with lowest speed, work as y
3＞actual measured value y＞y
2The time motor move with middling speed, work as y
2＞actual measured value y＞y
lThe time motor with quasi high-speed operation, as actual measured value y＜y
lThe time motor full speed running.
In the country sewage processing technological flow figure shown in the accompanying drawing 5: the domestic sewage in rural areas by using through tertiary treatment flows into grating tank; Liquidometer is installed in the grating tank; The liquid level height that records according to liquidometer and the control strategy of lift pump are controlled lift pump, as actual measured value y＜y
lThe Shi Qidong drive-motor is injected into anaerobic pond with sewage; As actual measured value y＞y
hThe time stop motor operation; ORP, PH, TP are installed in the anaerobic pond, and this Several Parameters only is used for measuring, and is not used in the control to topworks; Flow into biological contact oxidation pond through the sewage after the anaerobic treatment, DO transmitter and aeration pump are installed in the oxidation pond; After biological contact oxidation pond is handled, get into settling tank, sludge reflux pump is installed in the settling tank; Discharge after strengthening person who lives in exile worker's wetland through multistage worry bed more at last.
In the gear hardware block diagram shown in the accompanying drawing 6: the current signal of each transmitter is imported the ARM9 treater behind I/V translation circuit, voltage follower circuit, A/D change-over circuit, realizes the detection of ORP, PH, DO, temperature; Network Interface Module provides with the network of server and is connected, and realizes image data and uploading of video monitoring data and assigning of control strategy parameter and steering order; Video interface is used for the live video monitoring, and realizes remote monitoring through network interface; Touch-screen is used for the demonstration of take off data, the input and the field control instruction input of nominal data; Flash memory is used for the correlation parameter of store data table and various Measurement Algorithm, control strategy; Motor drive module is realized control and the driving to sewage pump, jet-flow aeration pump and sludge reflux pump.
In voltage follow shown in the accompanying drawing 7 and A/D change-over circuit: the current signal of transmitter output is through 250 Europe precision resistance R01, and it is output as voltage signal, and as the input of voltage follower, voltage follower is realized that by LM324 the A/D conversion is adopted has I
2The AD1100 chip of C interface, communication pin SCL and SDA connect respectively and draw resistance R 02 and R03, through I
2C communicates by letter with ARM9.
In the video interface circuit shown in the accompanying drawing 8: adopt the SAA7113 video decoding chip; AI11 and AI12 are that the input of a pair of difference meets first via analog video signal, AI21 and AI22 input connects the second road analog video signal to difference for another; C33, C34 are partiting dc capacitor, and R56, R57, R58, R59, R60 are used for the signal differential input, and VPO0-VPO7 is the outputs of 8 bit data; R55, R61, R66, R67 are pull-up resistor, I
2C interface is used for the initialize to SAA7113, can change input through the difference configuration of internal register.
In the network interface circuit shown in the accompanying drawing 9: adopt fully-integrated and cost-effective single-chip Fast Ethernet mac controller DM9000; SD0-SD15 is 16 for DB; Link to each other with ARM9, crystal oscillator X6 and capacitor C 31, C32 constitute crystal oscillating circuit, and RX+, RX-are that network receives signal input part; TX+, TX-are the network signaling output terminal, link to each other with netting twine through the networking X-former.
Claims (5)
1. a new village domestic sewage processing system gear is characterized in that comprising transmitter, sampling resistor, voltage follower, A/D change-over circuit, ARM9 treater and electrode; The current signal i of transmitter output
InThrough output voltage numeral amount V behind sampling resistor, voltage follower, the A/D change-over circuit
In, V
InPass through I
2C interface is transferred to the ARM9 treater; The work of ARM9 output signal control lift pump, sludge reflux pump, aerator motor.
2. domestic sewage processing system gear according to claim 1 is characterized in that also can connecting demarcation and the correction that touch-screen is realized measured parameter through video interface circuit; Realize network management through network interface circuit.
3. the method for said Sewage treatment systems gear application of claim 1 and sewage detection is characterized in that comprising the steps: that the ARM9 treater reads earlier 50 voltage digital amount V after the conversion continuously when start
In, calculate first observed value V of its statistical average value as system
Out(0); Thereafter the voltage digital amount V that at every turn records
InAt first with last observed value V
Out(j) relatively, if V
InDepart from greater than 10%, then be judged to be undesired signal, directly ignore this observed value, if V
InDepart from less than 10%, then observed value V last time
Out(j) take advantage of in weight 90% and this voltage digital amount V that records
InTake advantage of in weight 10% as this observed value V
Out(j+1) output; Again observed value is passed through calibration algorithm with V afterwards
Out(j+1) remove in corresponding correction scale-up factor k
p, add drift correction amount δ, obtain the actual value of DO, ORP, PH, temperature and liquid level respectively, the actual value of output is as the input signal of measuring demonstration and electric machine control.
4. method according to claim 3, the voltage follower that it is characterized in that before the A/D conversion, adding is in order to eliminate the influence of input resistance to measuring; Initial measurement adopts telltale k to count, and each sampled value V
InBe deposited among the array V (k), when counting k reaches 50 times, the statistical average value V that measures
Out(0)=∑ V (k)/50 is as first observed value, unstable, the unstable measuring error that causes of circuit of basically eliminate start moment transmitter.
5. method according to claim 4,, it is characterized in that departing from the less sampled value of average as efficiently sampling value V for sampled value
In, adopt weighted mean formula V
Out(j+1)=V
Out(j) * 0.9+V
In* 0.1 pair of output voltage values is revised.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210081392 CN102616989B (en) | 2012-03-26 | 2012-03-26 | Rural domestic sewage treatment system control device and application thereof |
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|---|---|---|---|
| CN 201210081392 CN102616989B (en) | 2012-03-26 | 2012-03-26 | Rural domestic sewage treatment system control device and application thereof |
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| CN102616989B CN102616989B (en) | 2013-08-14 |
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| CN 201210081392 Active CN102616989B (en) | 2012-03-26 | 2012-03-26 | Rural domestic sewage treatment system control device and application thereof |
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Cited By (6)
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| CN103058359A (en) * | 2013-01-29 | 2013-04-24 | 济南大学 | Integral controller applied to aeration tank for sewage treatment |
| CN103529812A (en) * | 2013-10-28 | 2014-01-22 | 江苏商达水务有限公司 | Rural micro power remote water quality monitoring and equipment control device |
| CN106597879A (en) * | 2016-11-03 | 2017-04-26 | 中冶华天工程技术有限公司 | Sewage treatment elevator pump optimized scheduling method |
| CN104298208B (en) * | 2014-10-27 | 2017-05-10 | 宋建峰 | Intelligent Internet of Things system adapting to water purifying device |
| CN106681405A (en) * | 2016-12-30 | 2017-05-17 | 成都机缘环保科技有限公司 | Sewage treatment monitoring device and remote monitoring system |
| CN107479519A (en) * | 2017-08-31 | 2017-12-15 | 安庆市公用工程公司 | A kind of Intellectualized monitoring management system of rural sewage treatment |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107479519A (en) * | 2017-08-31 | 2017-12-15 | 安庆市公用工程公司 | A kind of Intellectualized monitoring management system of rural sewage treatment |
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Address after: 214000 Jiangsu city of Wuxi province Xishan economic and Technological Development Zone No. 2 Feng Wei Lu savera No. 1 107&108 Patentee after: Jiangsu Eic water Co., Ltd. Address before: 214000 Xishan Economic Development Zone, Wuxi, Furong Road No. 99, No., No. three Patentee before: Jiangsu Shangda Water Affair Co., Ltd. |