CN101776916B - Sewage level sensor fault instant diagnosing, alarming and switching device - Google Patents
Sewage level sensor fault instant diagnosing, alarming and switching device Download PDFInfo
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- CN101776916B CN101776916B CN2010101080043A CN201010108004A CN101776916B CN 101776916 B CN101776916 B CN 101776916B CN 2010101080043 A CN2010101080043 A CN 2010101080043A CN 201010108004 A CN201010108004 A CN 201010108004A CN 101776916 B CN101776916 B CN 101776916B
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Abstract
The invention discloses a sewage level sensor fault instant diagnosing, alarming and switching device. The device comprises a microprocessor, a data memory and a D/A converter, a signal processing and switching link, an amplifying and isolated outputting link and an alarm output, wherein the I/O data port of the microprocessor is connected with the serial port of the data memory, the data port of the D/A converter is connected with the data port of the signal processing and switching link, the I/O output port of the microprocessor is connected with the alarm output through an amplifier A, and the analog output port of the D/A converter is connected with the input end of the amplifying and isolated outputting link and the control signal input end of the signal processing and switching link. The device can be used to perform instant diagnosing and alarming to the sewage level sensor fault, effectively predict the fault, namely automatic control function disorder, caused by sewage level sensor fault and abnormal operation, of a pump station discharging system, perform switching control, avoid sewage leakage caused by the fault and the accident occurrences such as the damage of a pump and facilitate the fault to be instantly removed.
Description
Technical field
The present invention relates to a kind of sewage level sensor fault instant diagnosing, alarming switching control.
Background technology
The data that sensing is gathered are the control foundation of control system normally.In the sewage pumping station unwatering system, liquid level sensor all plays crucial effects as the primary source of decision information to the detection of controlling running precision and key liquid level.Yet because himself long term exposure is in the sewage environment, easy stained and aged deterioration, in case sewage level sensor breaks down or malfunction, to directly cause the automatic control function disorder of pumping plant foul water system, systemic breakdown, may cause that great sewage overflows, even jeopardize accidents such as pump damage.Owing to also not have at present prediction and in time find the method and apparatus of sensor fault, so can only rely on artificial inference analysis to the investigation of this class fault usually and test comparison is tested, workload is big; Simultaneously, traditional control system is because shortage is carried out real-time diagnosis early warning, switching controls to it, so the loss that sensor fault causes is surprising, and this has caused engineering technical personnel and user's great attention, and this has also had a strong impact on the acceptance level of people to automated system.
Summary of the invention
The purpose of this invention is to provide a kind of sewage level sensor fault instant diagnosing, alarming switching control, to realize the fault of liquid level sensor in diagnosis in time and the discovery pumping plant foul water system, and in time alarm and switching controls, stop the misoperation operation of controlled device.
Sewage level sensor fault instant diagnosing, alarming switching control of the present invention, comprise microprocessor, data-carrier store, D/A converter, signal Processing conversion and control link, amplify and isolate output element and the output of reporting to the police, the I/O data port of microprocessor and the serial port of data-carrier store, the data port of the data port of D/A converter and signal Processing conversion and control link links to each other, the I/O delivery outlet of microprocessor links to each other with the output of reporting to the police through amplifier A, and the simulation delivery outlet of D/A converter links to each other with the input end that amplifies the isolation output element and the signal input end of signal Processing conversion and control link.
During work, the status signal input port of the signal Processing conversion and control link of sewage level sensor fault instant diagnosing, alarming switching control is linked to each other with the status signal output terminal of sewage pumping station unwatering system major loop, the status signal output terminal of major loop comprises the signal output part of liquid level sensor, current signal output end, voltage signal output end etc., the control output end of signal Processing conversion and control link is linked to each other with the DC control circuit of sewage pumping station unwatering system, amplify the control output end that isolates output element and link to each other with the Relay-controlled Circuit of sewage pumping station unwatering system.The analog input mouth of microprocessor cycle scan A/D converter, gather the standard electric signal of each sewage level sensor, the analog signal conversion of sampling is become the digital signal of corresponding test point by A/D converter, this microprocessor carries out diagnostic analysis to the digital signal of gathering subsequently, if break down, microprocessor provides warn signal controlling light and audible alarm on the one hand, detect other status signals of major loop on the other hand, and signal carries out switching controls in view of the above: at first microprocessor sends switching command through D/A converter, by amplifying the switching of isolating output element control relay loop; The switch-over control signal of D/A converter output simultaneously carries out switching controls through signal Processing conversion and control link to DC loop, to avoid the causing accident that power-equipment misoperations such as pump cause because of level sensor fault, diagnostic result will be stored in data-carrier store, and information is provided for fixing a breakdown.
Usually level sensor fault mainly can be summed up as two classes, and certain reason of the first kind makes the value of sampling not change with work condition state and is fixed on some values all the time; Certain reason of second class makes sampled value generation random jump.This device is realized autonomous diagnosis with above-mentioned two kinds of faults of liquid level sensor.Diagnostic method is as follows: with current sampled value and last time sampled value subtract, whether judge difference at zone of reasonableness, as be lower than zone of reasonableness, rolling counters forward, otherwise zero clearing, when count value arrive threshold value, then regard as first kind fault and take place, otherwise normal; Be higher than zone of reasonableness as difference, rolling counters forward is seen M the cycle interior (the M value is decided on operating mode) thereafter simultaneously, whether still is higher than zone of reasonableness, take place if occur then being judged to be the second class fault once again, otherwise normal.
The invention has the advantages that: can carry out care diagnostic and warn sewage level sensor fault, the effective disorderly fault of the automatic control function of pumping drainage system that causes by level sensor fault and malfunction of early warning, carry out switching controls simultaneously, the sewage outflow of avoiding this type of fault to cause, even accident such as pump damage takes place, and helps the timely eliminating of fault.
Description of drawings
Fig. 1 is that the sewage level sensor fault instant diagnosing, alarming switching control constitutes synoptic diagram.
Fig. 2 is a kind of formation synoptic diagram of signal Processing conversion and control link.
Embodiment
With reference to Fig. 1, sewage level sensor fault instant diagnosing, alarming switching control sewage level sensor fault instant diagnosing, alarming switching control of the present invention, it is characterized in that comprising microprocessor 1, data-carrier store 2, D/A converter 3, signal Processing conversion and control link 4, amplify and isolate output element 5 and the output 6 of reporting to the police, the I/O data port of microprocessor 1 and the serial port of data-carrier store 2, the data port of the data port of D/A converter 3 and signal Processing conversion and control link 4 links to each other, the I/O delivery outlet of microprocessor 1 links to each other with the output 6 of reporting to the police through amplifier A, and the simulation delivery outlet of D/A converter 3 links to each other with the input end that amplifies isolation output element 5 and the signal input end of signal Processing conversion and control link 4.
Above-mentioned microprocessor 1 adopts the 80C51 single-chip microcomputer, data-carrier store 2 AT45DB161B chip, D/A converter 3 DAC0832 chip, the formation of signal Processing conversion and control link 4 as shown in Figure 2, comprise A/D converter 7, I/O extender 8, two address latch 9, a the first Signal Spacing converter 10, b secondary signal isolating converter 11, c photoelectricity isolating converter 12, d control output treatment conversion device 13, a, b, c, d is respectively positive integer, the data port of the data port of A/D converter 7 and I/O expansion 8 is respectively with first, the data port of second address latch 9 links to each other, the output terminal of the output terminal of the first Signal Spacing converter 10 and secondary signal isolating converter 11 links to each other with the analog input mouth of AD converter 7 respectively, the output terminal of photoelectricity isolating converter 12 links to each other with the input port of IO extender 8, the input end of control output treatment conversion device 13 links to each other with the delivery outlet of IO extender 8, the first above-mentioned Signal Spacing converter 10 is by mutual inductor T1, resistance R 5, capacitor C 1, C2, amplifier A3 forms, secondary signal isolating converter 11 is by resistance R 6, R7, capacitor C 3, C4, amplifier A4 forms, photoelectricity isolating converter 12 is by resistance R 1, diode D1, optocoupler V1 forms, and control output treatment conversion device 13 is by amplifier A5, diode D3 forms.Wherein, A/D converter 7 can adopt the ADC0809 chip, and address latch 74LS373, I/O expand available 8255A chip.Amplify isolation output element 5 and be made up of amplifier A2, resistance R 4, diode D1 and relay K, the output 6 of reporting to the police comprises pilot lamp and hummer etc.
With single liquid level sensor sewage pumping station exhaust system is example, and level sensor fault instant diagnosing, alarming switching controls process is as follows:
1. care diagnostic function: after interval between diagnosis i began, 80C51 gathered the standard electric signal of liquid level sensor output earlier, is the liquid level h of corresponding intake pool test point through the A/D conversion process
i, this value is the main foundation of fault diagnostic analysis.The process of its diagnosis is: the h of current period
iH with last one-period
I-1Make difference and calculate, obtain Δ=| h
i-h
I-1|, then with this Δ and standard value δ
1(δ
1The minimal ripple value that can not occur during for the sewage level sensor operate as normal) and δ
2(δ
2Maximum saltus step amplitude during for the sewage level sensor operate as normal is by the actual condition decision) compare, if Δ＜δ
1, then counter k is carried out unit and add up, otherwise to counter k zero clearing; If Δ＞δ
2, then counter m sum counter n is all added up; If δ
1≤ Δ≤δ
2, value that then must detection counter m, if counter m is 0, then counter n zero clearing, if counter m is not 0 and less than threshold value M, then counter m adds up, counter n keeps, if counter m reaches threshold value M, the then equal zero clearing of counter m sum counter n.At last, judge counter k, counter m, the value of counter n is worked as k, and the arbitrary value of n surpasses the max-thresholds K that sets, N, then this liquid level sensor of decidable breaks down, and upgrades the signal of warning, and to diagnostic result k, m, n stores.
2. switching controls and alarm: when the end of level sensor fault interval between diagnosis, warn signal and diagnostic result will be updated, and this Setup Controller must be monitored this signal of warning immediately, and whether decision starts warning and switching controls.Take place in case confirm fault, alarm module is carried out light and audible alarm, so that the related personnel in time finds the existence of fault; Simultaneously, trouble-shooter independently detects the status signal of major loop, and signal carries out switching controls in view of the above: the switching command of D/A converter output on the one hand, amplify and isolate through amplifier and output to controlled loop and do control and switch; The switching signal sent of D/A converter is switched other relevant controlled loops through signal Processing conversion and control link on the other hand, causes because of level sensor fault that to avoid the pumping drainage system power-equipment misoperation such as pump causes the accident.The correlation values of diagnostic procedure is stored in data-carrier store, as the analysis foundation of fault eliminating.
Different with single liquid level sensor pumping drainage system is, the multi-level sensing system relies on the collaborative operation foundation that control pumping plant unwatering system is provided of a plurality of liquid level sensors, and there is certain correlativity in the output valve of each liquid level sensor.The method of its fault diagnosis remakes the mutual survey diagnosis of different liquid level sensors on single liquid level sensor is tested oneself the basis of diagnosing, according to be choose for referencial use with another liquid level sensor that is associated by diagnostic sensor, reach max-thresholds if exceeded normal range by the difference of diagnosticum level sensor and reference level sensor output value, and this moment, k or n were not 0, the then existence of decidable fault.The inspection diagnosis has reduced the threshold value that liquid level sensor is tested oneself and diagnosed mutually, has improved fault diagnosis efficiency.
Claims (1)
1. sewage level sensor fault instant diagnosing, alarming switching control, it is characterized in that comprising microprocessor (1), data-carrier store (2), D/A converter (3), signal Processing conversion and control link (4), amplify and isolate output element (5) and the output (6) of reporting to the police, the serial port of the I/O data port of microprocessor (1) and data-carrier store (2), the data port of the data port of D/A converter (3) and signal Processing conversion and control link (4) links to each other, the I/O delivery outlet of microprocessor (1) links to each other with the output (6) of reporting to the police through amplifier (A), and the simulation delivery outlet of D/A converter (3) links to each other with the input end that amplifies isolation output element (5) and the signal input end of signal Processing conversion and control link (4); After interval between diagnosis i began, microprocessor was gathered the standard electric signal of liquid level sensor output earlier, is the liquid level h of corresponding intake pool test point through the A/D conversion process
i, this value is the main foundation of fault diagnostic analysis, the process of its diagnosis is: the h of current period
iH with last one-period
I-1Make difference and calculate, obtain Δ=| h
i-h
I-1|, then with this Δ and standard value δ
1And δ
2Compare δ
1The minimal ripple value that can not occur during for the sewage level sensor operate as normal, δ
2Maximum saltus step amplitude during for the sewage level sensor operate as normal is by the actual condition decision, if Δ＜δ
1, then counter k is carried out unit and add up, otherwise to counter k zero clearing; If Δ＞δ
2, then counter m sum counter n is all added up; If δ
1≤ Δ≤δ
2, value that then must detection counter m, if counter m is 0, then counter n zero clearing, if counter m is not 0 and less than threshold value M, then counter m adds up, counter n keeps, if counter m reaches threshold value M, the then equal zero clearing of counter m sum counter n, last, judge counter k, counter m, the value of counter n is worked as k, and the arbitrary value of n surpasses the max-thresholds K that sets, N, then this liquid level sensor of decidable breaks down, and upgrades the signal of warning, and to diagnostic result k, m, n stores;
Above-mentioned signal Processing conversion and control link (4) comprises A/D converter (7), I/O extender (8), two address latch (9), a the first Signal Spacing converter (10), b secondary signal isolating converter (11), c photoelectricity isolating converter (12), d control output treatment conversion device (13), a, b, c, d is respectively positive integer, the data port of the data port of A/D converter (7) and I/O expansion (8) is respectively with first, the data port of second address latch (9) links to each other, the output terminal of the output terminal of the first Signal Spacing converter (10) and secondary signal isolating converter (11) links to each other with the analog input mouth of AD converter (7) respectively, the output terminal of photoelectricity isolating converter (12) links to each other with the input port of IO extender (8), the input end of control output treatment conversion device (13) links to each other with the delivery outlet of IO extender (8), the first above-mentioned Signal Spacing converter (10) is by mutual inductor T1, resistance R 5, capacitor C 1, C2, amplifier A3 forms, secondary signal isolating converter (11) is by resistance R 6, R7, capacitor C 3, C4, amplifier A4 forms, photoelectricity isolating converter (12) is by resistance R 1, diode D1, optocoupler V1 forms, and control output treatment conversion device (13) is by amplifier A5, diode D3 forms.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101080043A CN101776916B (en) | 2010-02-09 | 2010-02-09 | Sewage level sensor fault instant diagnosing, alarming and switching device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101080043A CN101776916B (en) | 2010-02-09 | 2010-02-09 | Sewage level sensor fault instant diagnosing, alarming and switching device |
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| CN101776916A CN101776916A (en) | 2010-07-14 |
| CN101776916B true CN101776916B (en) | 2011-07-20 |
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| CN103075331A (en) * | 2012-12-29 | 2013-05-01 | 苏州市职业大学 | Sewage lifting control alarm |
| CN104122882A (en) * | 2013-04-24 | 2014-10-29 | 中烟机械技术中心有限责任公司 | Fault diagnosis system of Balluff self-diagnostic type sensor |
| CN104267755B (en) * | 2014-09-24 | 2016-12-07 | 杭州华孚环境工程技术有限公司 | User pipe from motion tracking without sub-pressure high-efficient economize on electricity water supply installation |
| CN104444929B (en) * | 2014-11-06 | 2017-08-01 | 北京铁道工程机电技术研究所有限公司 | A kind of self checking method of car lifting J-Horner height sensor |
| CN105136234B (en) * | 2015-05-05 | 2018-03-16 | 中国能源建设集团广东省电力设计研究院有限公司 | The failure detector of heater water level detector |
| CN106094792A (en) * | 2016-06-20 | 2016-11-09 | 长沙威保特环保科技股份有限公司 | Fault self-diagnosis method and device for sewage disposal system |
| CN110926571B (en) * | 2018-09-19 | 2021-04-20 | 联合汽车电子有限公司 | System and method for evaluating and correcting accuracy of fuel level sensor |
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| CN111397653B (en) * | 2020-04-01 | 2021-11-19 | 中煤科工集团重庆研究院有限公司 | Fault diagnosis system and method for sensor for coal mine |
| CN111422932A (en) * | 2020-04-27 | 2020-07-17 | 岳阳佰胜智慧环保科技有限公司 | Operation control method of grating dirt separator |
| CN113391554B (en) * | 2021-06-16 | 2022-06-17 | 江苏东南环保科技有限公司 | Electroplating method based on artificial intelligence |
| CN113804231A (en) * | 2021-08-03 | 2021-12-17 | 大唐三门峡电力有限责任公司 | Thermal power plant sensor fault diagnosis device and diagnosis method |
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