CN103645246A - Ultrasonic sludge concentration online monitoring device - Google Patents
Ultrasonic sludge concentration online monitoring device Download PDFInfo
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- CN103645246A CN103645246A CN201310571812.7A CN201310571812A CN103645246A CN 103645246 A CN103645246 A CN 103645246A CN 201310571812 A CN201310571812 A CN 201310571812A CN 103645246 A CN103645246 A CN 103645246A
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Abstract
The invention discloses an ultrasonic sludge concentration online monitoring device, which includes an ultrasonic emission circuit, an ultrasonic emission transducer, an ultrasonic receiving transducer, an ultrasonic receiving circuit, a temperature sensor, a temperature measurement circuit, a microprocessor, a serial communication circuit, a current signal output circuit, a 3G communication module and a fixation frame. The 3G communication module is connected to the microprocessor. The ultrasonic sludge concentration online monitoring device provided by the invention adopts an ultrasonic monitoring method, has strong anti-interference performance, can accurately acquire relevant monitoring data, and analysis and calculation are carried out by the microprocessor to obtain the sludge concentration. The test result of the microprocessor is transmitted to a monitoring center timely and effectively through the 3G communication module to perform analysis and make corresponding decision, and real-time monitoring can be comprehensively and continuously conducted on dynamic change of the sludge concentration. The adopted 3G communication module is a wireless communication network system, which is convenient for field layout and remote transmission, and the monitoring result can be expressed visually.
Description
Technical field
The present invention relates to Intelligent monitoring device technical field, refer in particular to a kind of ultrasonic sludge concentration on-line monitoring device.
Background technology
Sludge concentration is that an operating important process such as water supply plant, Sewage Plant is controlled parameter.Traditional hand sampling chemical drying analytical approach, efficiency is low, measuring period is long, is difficult to play a role in technology controlling and process.For this reason, people have developed that to take optical method, rays method, vibratory drilling method, supercritical ultrasonics technology be that basic sludge concentration surveying instrument, particularly ultrasonic attenuation method sludge concentration measuring instrument are more in sewage treatment area application.Because changes in environmental conditions in practical application is large, the reason such as tested mud range of temperature is wider, existing sludge concentration surveying instrument is difficult to obtain satisfied measuring accuracy.Portable supersonic mud meter can improve measuring accuracy surely by the measurement rower that advances, and real time on-line monitoring is difficult to frequently manually demarcate with ultrasonic sludge densimeter, so measuring error is larger, is difficult to play a role.
At present, municipal sewage plant 80% all adopts active sludge treatment scheme both at home and abroad.Therefore, monitor the mass effect of wastewater treatment, first should monitor the characteristic index of active sludge in sewage: SV, MLSS, SVI, SDI.By the manual inspection technological approaches of current international norm, cannot realize round the clock the technical goal of monitoring continuously.
In the operational management of Wastewater Treated by Activated Sludge Process process and in every test of activated sludge purification reaction, as activated sludge concentration index and widely used be the number percent (SV3o) of active sludge intermixture concentration of suspension (MLSS) and 30min subsidence volumn.
Mud MLSS is very important parameter, often usings MLSS as the index of indirect metering active sludge microorganism amount in engineering, and it is an important control parameter of operational management.If MLSS exceeds particular range, must manage to make it to recover normal, otherwise certainly will cause biological treatment system effluent quality to change, even cause the various discharge indexs that comprise suspension to exceed standard.In addition, by measuring MLSS, the sludge volume index of mixed liquor be can also monitor, thereby settling character and the activity of active sludge and other biological suspending liquid understood.
The mensuration of SV value can be used for monitoring the performance of active sludge intermixture.Usually with SV, instruct the operation of activated Sludge System.If when cohesion, the settling property of active sludge is good, the size of SV can reflect the sludge quantity (international standard is 2^-4g/L) of the normal operation of activated sludge tank.So often control the discharge capacity of excess sludge with SV in a lot of Sewage Plant.
Sludge index SVI can reflect the quality of activated sludge settling property more accurately.Relatively SV, has got rid of the impact of sludge concentration on settling volume in the concept of SVI, can reflect preferably the loosening degree of active sludge and cohesion, sedimentation function, is a Common Parameters of the concentrated performance of judgement sludge settling.
At present, the measurement of MLSS is also adopted the gravimetric analysis method of time and effort consuming both at home and abroad, often will spend several hours and just can detect result.The optics turbidity detecting head of external import, price is more expensive, and sensitivity religion is low, and it can only judge MLSS roughly, and it misses by a mile, and photoelectric colorimetry only can detect MLSS single index in addition.In addition, SV and SVI are not also formed to a set of route of more completely automatically monitoring both at home and abroad, the monitoring of these two indexs is all undertaken by manual type, therefore the processing procedure of continuous operation cannot realize high-level efficiency round the clock, the waste of one day triple shift human resources, cause information automatically to collect not in time, cause the backwardness of wastewater treatment robotization mechanism.
Summary of the invention
In view of this, the present invention is directed to the disappearance of prior art existence, its fundamental purpose is to provide the ultrasonic sludge concentration on-line monitoring device that a kind of intelligent monitoring, strong interference immunity, precision are high, can analyze in time and process related experiment data.
For achieving the above object, the present invention adopts following technical scheme: a kind of ultrasonic sludge concentration on-line monitoring device, comprises ultrasonic transmit circuit, ultrasound transmitting transducer, ultrasound wave receiving transducer, ultrasound wave receiving circuit, temperature sensor, temperature measuring circuit, microprocessor, serial communication circuit, current signal output circuit, 3G communication module and fixed mount; Described ultrasound transmitting transducer and ultrasound wave receiving transducer relative spacing layout, centre is fixed by fixed mount; Described microprocessor includes microprocessor extensions circuit and the microprocessor writing is housed controls software; Described 3G communication module is connected with microprocessor;
Described ultrasonic transmit circuit is under the control of microprocessor extensions circuit, the frequency of operation that follow procedure is set provides excitation pulse signal for ultrasound emission wave transducer, the signal that ultrasound wave receiving circuit produces ultrasound wave receiving transducer is through amplifying, after detection, give microprocessor extensions circuit sampling, simultaneously, temperature measuring circuit is given microprocessor extensions circuit sampling after measured temperature signal is amplified, microprocessor is controlled software and is calculated hyperacoustic attenuation ratio according to the ultrasound wave reception signal amplitude sampling, according to the temperature value sampling, according to attenuation ratio variation with temperature rule, attenuation ratio is carried out to temperature correction again, and then according to the relation of sludge concentration and attenuation ratio, calculate sludge concentration value according to attenuation ratio, the described 3G communication module just mode of analysis result by figure and curve exports monitoring center to and carries out the further analysis of data and make corresponding decision-making.
As a kind of preferred version, described ultrasonic transmit circuit is the radiating circuit that adopts Direct Digital DDS;
As a kind of preferred version, in described microprocessor extensions circuit, have and store the storer that affect data of water temperature on ultrasonic attenuation.
As a kind of preferred version, described temperature sensor is fixed on the inwall of housing of ultrasound wave transmitting or receiving transducer.
The present invention compared with prior art has obvious advantage and beneficial effect, specific as follows:
1, the present invention adopts monitoring ultrasonic method, it has stronger interference free performance, can obtain accurately relevant Monitoring Data, and analyze with computing and draw sludge concentration by microprocessor, this sludge concentration transfers to timely and effectively monitoring center through 3G communication module by the test result of microprocessor and analyzes and make corresponding decision-making, continuously the dynamic change of sludge concentration is carried out to Real-Time Monitoring comprehensively; The 3G communication module adopting is wireless communication network system, is convenient to on-the-spot laying and remote transmission; And can express intuitively monitoring result.
2, this ultrasonic transmit circuit is the radiating circuit that adopts Direct Digital, Direct Digital (DDS) is from a frequency reference source, to produce multi-frequency by numerically controlled method, owing to being used as the quartz oscillator in frequency reference source, there is high temperature stability, and digital combiner circuit precision is very high, so the sine wave freuqency obtaining is thus highly stable, greatly improve the stability of transmission frequency, solved the problem of frequency drift.Direct Digital frequency synthesis technology is introduced to ultrasonic transmit circuit, greatly improved Measurement sensibility and the measuring accuracy of instrument.
3, in the storer of this microprocessor extensions circuit, store the affect data of water temperature on ultrasonic attenuation.Mud is comprised of two parts hyperacoustic decay, and the one, the absorption of water, the 2nd, the scattering of the mud granule relevant with sludge concentration.By testing us, obtained the affect rule of 0-40 ℃ of water temperature on ultrasonic attenuation, and correlation parameter stored in storer, microprocessor carries out temperature compensation according to the temperature value of the fluid to be measured detecting by this rule, calculates the actual concentrations of mud.
4, this ultrasound transmitting transducer and ultrasound wave receiving transducer relative spacing are arranged, centre is fixed by fixed mount.Guarantee that like this ultrasound wave that ultrasound transmitting transducer sends, through after tested mud, can stably arrive ultrasound wave receiving transducer, drive the vibration of ultrasound wave receiving transducer, improved measuring accuracy.
5, this ultrasonic transmit circuit adopts DDS Direct Digital frequency synthesis technology, greatly improves the stability of transmission frequency, thereby has improved measuring accuracy and stability.
6, this temperature sensor and ultrasonic sensor are contained in same probe, can detect concentration and the temperature of fluid to be measured simultaneously, and application is convenient.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet in the present invention's preferred embodiment.
Embodiment
Please refer to shown in Fig. 1, a ultrasonic sludge concentration on-line monitoring device, comprises ultrasonic transmit circuit, ultrasound transmitting transducer, ultrasound wave receiving transducer, ultrasound wave receiving circuit, temperature sensor, temperature measuring circuit, microprocessor, serial communication circuit, current signal output circuit, 3G communication module and fixed mount; Described ultrasound transmitting transducer and ultrasound wave receiving transducer relative spacing layout, centre is fixed by fixed mount; Described microprocessor includes microprocessor extensions circuit and the microprocessor writing is housed controls software; Described 3G communication module is connected with microprocessor.
Wherein, this ultrasonic transmit circuit is under the control of microprocessor extensions circuit, the frequency of operation that follow procedure is set provides excitation pulse signal for ultrasound emission wave transducer, the signal that ultrasound wave receiving circuit produces ultrasound wave receiving transducer is through amplifying, after detection, give microprocessor extensions circuit sampling, simultaneously, temperature measuring circuit is given microprocessor extensions circuit sampling after measured temperature signal is amplified, microprocessor is controlled software and is calculated hyperacoustic attenuation ratio according to the ultrasound wave reception signal amplitude sampling, according to the temperature value sampling, according to attenuation ratio variation with temperature rule, attenuation ratio is carried out to temperature correction again, and then according to the relation of sludge concentration and attenuation ratio, calculate sludge concentration value according to attenuation ratio, the described 3G communication module just mode of analysis result by figure and curve exports monitoring center to and carries out the further analysis of data and make corresponding decision-making.
This ultrasonic transmit circuit is the radiating circuit that adopts Direct Digital DDS;
In this microprocessor extensions circuit, have and store the storer that affect data of water temperature on ultrasonic attenuation.
This temperature sensor is fixed on the inwall of housing of ultrasound wave transmitting or receiving transducer.
Design focal point of the present invention is: the present invention adopts monitoring ultrasonic method, it has stronger interference free performance, can obtain accurately relevant Monitoring Data, and analyze with computing and draw sludge concentration by microprocessor, this sludge concentration transfers to timely and effectively monitoring center through 3G communication module by the test result of microprocessor and analyzes and make corresponding decision-making, continuously the dynamic change of sludge concentration is carried out to Real-Time Monitoring comprehensively; The 3G communication module adopting is wireless communication network system, is convenient to on-the-spot laying and remote transmission; And can express intuitively monitoring result.
This ultrasonic transmit circuit is the radiating circuit that adopts Direct Digital, Direct Digital (DDS) is from a frequency reference source, to produce multi-frequency by numerically controlled method, owing to being used as the quartz oscillator in frequency reference source, there is high temperature stability, and digital combiner circuit precision is very high, so the sine wave freuqency obtaining is thus highly stable, greatly improve the stability of transmission frequency, solved the problem of frequency drift.Direct Digital frequency synthesis technology is introduced to ultrasonic transmit circuit, greatly improved Measurement sensibility and the measuring accuracy of instrument.In the storer of this microprocessor extensions circuit, store the affect data of water temperature on ultrasonic attenuation.Mud is comprised of two parts hyperacoustic decay, and the one, the absorption of water, the 2nd, the scattering of the mud granule relevant with sludge concentration.By testing us, obtained the affect rule of 0-40 ℃ of water temperature on ultrasonic attenuation, and correlation parameter stored in storer, microprocessor carries out temperature compensation according to the temperature value of the fluid to be measured detecting by this rule, calculates the actual concentrations of mud.
This ultrasound transmitting transducer and ultrasound wave receiving transducer relative spacing layout, centre is fixed by fixed mount.Guarantee that like this ultrasound wave that ultrasound transmitting transducer sends, through after tested mud, can stably arrive ultrasound wave receiving transducer, drive the vibration of ultrasound wave receiving transducer, improved measuring accuracy.This ultrasonic transmit circuit adopts DDS Direct Digital frequency synthesis technology, greatly improves the stability of transmission frequency, thereby has improved measuring accuracy and stability.This temperature sensor and ultrasonic sensor are contained in same probe, can detect concentration and the temperature of fluid to be measured simultaneously, and application is convenient.
The above, it is only preferred embodiment of the present invention, not technical scope of the present invention is imposed any restrictions, therefore every foundation technical spirit of the present invention is to any trickle modification made for any of the above embodiments, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (4)
1. a ultrasonic sludge concentration on-line monitoring device, is characterized in that: comprise ultrasonic transmit circuit, ultrasound transmitting transducer, ultrasound wave receiving transducer, ultrasound wave receiving circuit, temperature sensor, temperature measuring circuit, microprocessor, serial communication circuit, current signal output circuit, 3G communication module and fixed mount; Described ultrasound transmitting transducer and ultrasound wave receiving transducer relative spacing layout, centre is fixed by fixed mount; Described microprocessor includes microprocessor extensions circuit and the microprocessor writing is housed controls software; Described 3G communication module is connected with microprocessor;
Described ultrasonic transmit circuit is under the control of microprocessor extensions circuit, the frequency of operation that follow procedure is set provides excitation pulse signal for ultrasound emission wave transducer, the signal that ultrasound wave receiving circuit produces ultrasound wave receiving transducer is through amplifying, after detection, give microprocessor extensions circuit sampling, simultaneously, temperature measuring circuit is given microprocessor extensions circuit sampling after measured temperature signal is amplified, microprocessor is controlled software and is calculated hyperacoustic attenuation ratio according to the ultrasound wave reception signal amplitude sampling, according to the temperature value sampling, according to attenuation ratio variation with temperature rule, attenuation ratio is carried out to temperature correction again, and then according to the relation of sludge concentration and attenuation ratio, calculate sludge concentration value according to attenuation ratio, the described 3G communication module just mode of analysis result by figure and curve exports monitoring center to and carries out the further analysis of data and make corresponding decision-making.
2. a kind of ultrasonic sludge concentration on-line monitoring device according to claim 1, is characterized in that: described ultrasonic transmit circuit is the radiating circuit that adopts Direct Digital DDS.
3. a kind of ultrasonic sludge concentration on-line monitoring device according to claim 1, is characterized in that: in described microprocessor extensions circuit, have and store the storer that affect data of water temperature on ultrasonic attenuation.
4. a kind of ultrasonic sludge concentration on-line monitoring device according to claim 1, is characterized in that: described temperature sensor is fixed on the inwall of housing of ultrasound wave transmitting or receiving transducer.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104729967A (en) * | 2015-03-31 | 2015-06-24 | 无锡市崇安区科技创业服务中心 | Ultrasonic-based sludge concentration monitoring system |
| CN107664617A (en) * | 2017-10-25 | 2018-02-06 | 沈阳大学 | A kind of sludge concentration monitoring device |
| CN108693091A (en) * | 2018-06-29 | 2018-10-23 | 无锡厚发自动化设备有限公司 | A kind of sludge concentration monitoring system based on cloud platform |
| CN112946067A (en) * | 2021-02-05 | 2021-06-11 | 内蒙古科技大学 | Ultrasonic wave ore pulp concentration on-line detector and intelligent control terminal |
| CN115639125A (en) * | 2022-12-26 | 2023-01-24 | 四川薪火恒创科技有限公司 | Sludge concentration detection system and method |
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2013
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104729967A (en) * | 2015-03-31 | 2015-06-24 | 无锡市崇安区科技创业服务中心 | Ultrasonic-based sludge concentration monitoring system |
| CN107664617A (en) * | 2017-10-25 | 2018-02-06 | 沈阳大学 | A kind of sludge concentration monitoring device |
| CN108693091A (en) * | 2018-06-29 | 2018-10-23 | 无锡厚发自动化设备有限公司 | A kind of sludge concentration monitoring system based on cloud platform |
| CN112946067A (en) * | 2021-02-05 | 2021-06-11 | 内蒙古科技大学 | Ultrasonic wave ore pulp concentration on-line detector and intelligent control terminal |
| CN115639125A (en) * | 2022-12-26 | 2023-01-24 | 四川薪火恒创科技有限公司 | Sludge concentration detection system and method |
| CN115639125B (en) * | 2022-12-26 | 2023-10-20 | 四川薪火恒创科技有限公司 | Sludge concentration detection system and method |
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