CN103389117A - On-line powder flowing measurement device and method based on array type static sensor - Google Patents
On-line powder flowing measurement device and method based on array type static sensor Download PDFInfo
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- CN103389117A CN103389117A CN2013103148307A CN201310314830A CN103389117A CN 103389117 A CN103389117 A CN 103389117A CN 2013103148307 A CN2013103148307 A CN 2013103148307A CN 201310314830 A CN201310314830 A CN 201310314830A CN 103389117 A CN103389117 A CN 103389117A
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Abstract
The invention discloses an on-line powder flowing measurement device and method based on an array type static sensor in a technical range of on-line measurement of gas-solid two-phase flows. A static sensing detection sheet is mounted on a gas-solid two-phase flow pipeline and provided with a plurality of static sensing units; each static sensing unit is provided with two to three strip-shaped metal electrodes and corresponding signal amplifying circuits; when particles flow through adjacent electrodes, similar static sensing signals can be generated; an embedded type data processing module is used for performing synchronous sampling and mutual correlation calculation on static sensing signals of adjacent electrodes, so that the particle flowing speed and the particle relative volume concentration are obtained; and each static sensing unit can measure the instantaneous speed and the instantaneous concentration of particles in a local space where the unit is located and fuse all local information in the pipeline, so that the space average speed, the space average concentration and the instantaneous quality/volume flow of the particles in the pipeline are obtained, and measuring data are provided for a power flowing characteristic research and industrial site on-line diagnosis.
Description
Technical field
The invention belongs to Dual-Phrase Distribution of Gas olid line Measurement Technique scope, particularly a kind of on-line measurement of powder flowing based on array type electrostatic sensor device and method.
Background technology
It is that a kind of air-flow that utilizes is carried the effective ways of powder and granule shape material in pipeline that strength is carried, and it extensively is present in a plurality of industrial circles such as electric power, metallurgy, chemical industry, environmental protection, medicine.Presence of an interface effect and relative velocity in Dual-Phrase Distribution of Gas olid, phase interface are variable at random on time and space, cause its flow characteristics extremely complicated, and people go back limited to the understanding of Dual-Phrase Distribution of Gas olid flow mechanism up to now., in order the powder flowing phenomenon to be made rationally explanation accurately, effective monitoring equipment operation condition, to be optimized industrial processes, be necessary to be familiar with and to grasp flow characteristics and the Changing Pattern of Dual-Phrase Distribution of Gas olid.The measurement of gas-solid diphasic stream parameter is an internationally recognized difficult problem, through years of researches and exploration, powder flowing measurement method of parameters based on different principle and technology has been proposed both at home and abroad, as isokinetic sampling's method, optical method, microwave method, ultrasonic method, process tomographic imaging method, electrostatic method etc., these technology are are mainly researched and developed for the industry spot on-line continuous measures the powder flowing parameter, therefore can not carry out to the powder flowing parameter the comprehensive measurement of system, the detailed data that powder flowing characteristic and rule are carried out scientific research can't be provided.Powder granule is in process of pneumatic transmission, can accumulate the static charge of some, when grain flow is near electrostatic attraction electrode, can make electrode surface produce the induced potential signal of fluctuation,, by this signal is carried out suitable processing, can obtain the Dual-Phrase Distribution of Gas olid flow parameter.The present invention proposes a kind of parameter measurement system of powder flowing based on the array type electrostatic sensor, its fundamental design idea is to utilize the electrostatic transducer array to obtain the particle information of pipeline section local space,, by all local messages in pipeline are merged, can obtain the powder flowing parameter of whole pipeline section.This system can be measured powder in ducted instantaneous velocity profile, space mean speed, instantaneous concentration distribution, space average concentration and instantaneous mass/volumetric flow rate.
Summary of the invention
The purpose of this invention is to provide a kind of on-line measurement of powder flowing based on array type electrostatic sensor device and method, it is characterized in that, described powder flowing measurement mechanism is electrostatic induction to be installed visit sheet on the Dual-Phrase Distribution of Gas olid tube wall, and electrostatic induction is visited sheet and is inserted in the particle flow field or sticks on inner-walls of duct; Electrostatic induction is visited sheet and is consisted of electrostatic attraction electrode array and charge amplifier, and electrostatic induction is visited the output signal of sheet and nursed one's health, gathers, processes and analyzed by the embedded data processing module, to obtain the powder flowing parameter.
It is the flat structure that sheet is visited in described electrostatic induction, in electrostatic induction, visits on sheet and is distributed with a plurality of electrostatic induction unit, and each electrostatic induction unit consists of two to three strip metal electrodes; The strip metal electrode is perpendicular to carrying out flow path direction, and a plurality of strip metal electrodes of same unit are carrying out parallel distribution on flow path direction.
The width that sheet is visited in described electrostatic induction should not cause too large disturbance to be advisable with stream field, and its thickness is the 1-2 millimeter;
Described electrostatic induction is visited sheet and is made by stainless steel material, and its thickness is the 1-2 millimeter; And be coated with pottery to increase wearing quality.
Described powder flowing measurement mechanism is that the space of sheet in pipeline section layout versatile and flexible is visited in a plurality of electrostatic inductions, adopt respectively three and five electrostatic inductions that are arranged in parallel to visit sheet the pipeline flow field is measured, or adopt the equally distributed electrostatic induction spy sheet at three groups of 120 degree angles that are separated by to measure the pipeline flow field; Or sheet is visited in electrostatic induction be attached on inner-walls of duct, to realize the measurement to diverse location particle flow information.
Described embedded data processing module adopts second amplifying circuit and low-pass filter to nurse one's health signal, because the number of signals of needs collection and processing is more, and algorithm is complicated, utilize each IO port of field programmable gate array respectively a plurality of modulus conversion chips to be controlled, to realize the synchronous acquisition of multichannel electrostatic signal, and utilize its hardware parallel processing capability to realize real-time processing to electrostatic signal.
The described Parameter Measuring of powder flowing based on array type electrostatic sensor method, it is characterized in that, utilize grain flow can produce the phenomenon of similar electrostatic induction signal through adjacent electrode, multichannel electrostatic signal in same electrostatic induction unit is carried out synchronized sampling, adopt the transit time between cross correlation algorithm acquisition upstream and downstream electrostatic signal, then according to the space length between electrode, try to achieve the particle instantaneous velocity; Utilize the dull correlativity of electrostatic signal intensity and granule density, calculate the relative volume concentration of particle by the root-mean-square value of electrostatic signal; Measure instantaneous velocity and the instantaneous concentration of particle in its local space of living in each electrostatic induction unit,, by all local messages in pipeline are merged, obtain space mean speed, space average concentration and the instantaneous mass/volumetric flow rate of particle in pipeline.
The invention has the beneficial effects as follows: adopt array, distributed sensing technology to obtain the local message in particle flow field, merged by all local messages that will be distributed in pipeline space, can obtain the powder flowing parameter of whole pipeline section, thereby provide, powder flowing characteristic and rule are carried out the detailed data of scientific research, and be applicable to industry spot on-line continuous measurement powder flowing parameter.
Description of drawings
Fig. 1 is the theory structure schematic diagram of powder flowing measurement mechanism.
In figure: 1. Dual-Phrase Distribution of Gas olid pipeline; 2. sheet is visited in electrostatic induction; 3. electrostatic induction unit; 4. embedded data processing module.
Fig. 2 is the electrostatic induction unit schematic diagram.
In figure: 5 is the strip metal electrode.
Fig. 3 is that the multiple space layout form that sheet is visited in electrostatic induction: Fig. 3 (1) is depicted as and adopts single electrostatic induction to visit sheet the flow field at pipeline middle part is measured; Fig. 3 (2) with (3) for adopting respectively three spy sheets parallel with five to measure the pipeline flow field; Fig. 3 (4) measures the pipeline flow field for the equally distributed short spy sheet that adopts three groups of 120 degree angles that are separated by; Fig. 3 (5) sticks in inner-walls of duct and comes stream field to measure for visiting sheet.
Embodiment
The invention provides a kind of on-line measurement of powder flowing based on array type electrostatic sensor device and method.The present invention is explained as follows below in conjunction with drawings and Examples:
Figure 1 shows that the theory structure schematic diagram of powder flowing measurement mechanism.In figure, insert electrostatic induction and visit sheet 2 in Dual-Phrase Distribution of Gas olid pipeline 1, electrostatic induction is visited sheet 2 and is immersed in the particle flow field; It is the flat structure that sheet 2 is visited in electrostatic induction, and electrostatic induction is visited sheet 2 inner hollow so that the charge amplifying circuit plate to be installed, and the output signal of charge amplifying circuit plate is connected to embedded data processing module 4, to carry out signal condition, collection, processing and analysis; Embedded data processing module 4 output powder flowing parameter informations are for deliberation, diagnosis and control and use.Wherein, it is the flat structure that sheet 2 is visited in described electrostatic induction, is made by stainless steel material, and is coated with pottery to increase wearing quality.
Figure 2 shows that the electrostatic induction unit schematic diagram.Electrostatic induction unit 3 is comprised of three strip metal electrodes 5, is isolated by insulating material between strip metal electrode 5; Strip metal electrode 5 is perpendicular to carrying out flow path direction, and a plurality of electrodes of same unit are carrying out parallel distribution on flow path direction.
Figure 3 shows that the multiple space layout form of electrostatic induction spy sheet.
The difference that requires according to measuring position, precision etc., can arrange flexibly to quantity and the mounting means that sheet is visited in electrostatic induction.Fig. 3 (1) is depicted as and adopts single electrostatic induction spy sheet to measure the flow field at pipeline middle part; Fig. 3 (2) with (3) for adopting respectively three spy sheets parallel with five to measure the pipeline flow field; Fig. 3 (4) measures the pipeline flow field for the equally distributed short spy sheet that adopts three groups of 120 degree angles that are separated by; Fig. 3 (5) sticks in inner-walls of duct and comes stream field to measure for visiting sheet.
The powder flowing Parameter Measuring method that the present invention is based on the electrostatic transducer array is to utilize grain flow can produce the phenomenon of similar electrostatic induction signal through adjacent strip metal electrode 5, multichannel electrostatic signal in same electrostatic induction unit 3 is carried out synchronized sampling, adopt the transit time between cross correlation algorithm acquisition upstream and downstream electrostatic signal, then according to the space length between strip metal electrode 5, try to achieve the particle instantaneous velocity; Utilize the dull correlativity of electrostatic signal intensity and granule density, can calculate the relative volume concentration of particle by the root-mean-square value of electrostatic signal.Each electrostatic induction unit 3 can be measured instantaneous velocity and the instantaneous concentration of particle in its local space of living in,, by all local messages in pipeline 1 are merged, can obtain space mean speed, space average concentration and the instantaneous mass/volumetric flow rate of particle.
Claims (7)
1. the on-line measurement of the powder flowing based on array type electrostatic sensor device, it is characterized in that, described powder flowing measurement mechanism is electrostatic induction to be installed visit sheet on the Dual-Phrase Distribution of Gas olid tube wall, and electrostatic induction is visited sheet and is inserted in the particle flow field or sticks on inner-walls of duct; Electrostatic induction is visited sheet and is consisted of electrostatic attraction electrode array and charge amplifier, and electrostatic induction is visited the output signal of sheet and nursed one's health, gathers, processes and analyzed by the embedded data processing module, to obtain the powder flowing parameter.
2. according to claim 1 based on the powder flowing on-line measurement device of array type electrostatic sensor, it is characterized in that, it is the flat structure that sheet is visited in described electrostatic induction, visit on sheet and be distributed with a plurality of electrostatic induction unit in electrostatic induction, each electrostatic induction unit consists of two to three strip metal electrodes; The strip metal electrode is perpendicular to carrying out flow path direction, and a plurality of strip metal electrodes of same unit are carrying out parallel distribution on flow path direction.
3. the described on-line measurement of powder flowing based on array type electrostatic sensor device according to claim 1 and 2, is characterized in that, the width that sheet is visited in described electrostatic induction should not cause too large disturbance to be advisable with stream field, and its thickness is the 1-2 millimeter.
4., according to claim 1 based on the powder flowing on-line measurement device of array type electrostatic sensor, it is characterized in that, described electrostatic induction is visited sheet and is made by stainless steel material, and its thickness is the 1-2 millimeter; And be coated with pottery to increase wearing quality.
5. according to claim 1 based on the powder flowing on-line measurement device of array type electrostatic sensor, it is characterized in that, described powder flowing measurement mechanism is that the space of sheet in pipeline section layout versatile and flexible is visited in a plurality of electrostatic inductions, adopt respectively three and five electrostatic inductions that are arranged in parallel to visit sheet the pipeline flow field is measured, or adopt the equally distributed electrostatic induction spy sheet at three groups of 120 degree angles that are separated by to measure the pipeline flow field; Or sheet is visited in electrostatic induction be attached on inner-walls of duct, to realize the measurement to diverse location particle flow information.
6. according to claim 1 based on the powder flowing on-line measurement device of array type electrostatic sensor, it is characterized in that, described embedded data processing module adopts second amplifying circuit and low-pass filter to nurse one's health signal, because the number of signals of needs collection and processing is more, and algorithm is complicated, utilize each IO port of field programmable gate array respectively a plurality of modulus conversion chips to be controlled, to realize the synchronous acquisition of multichannel electrostatic signal, and utilize its hardware parallel processing capability to realize real-time processing to electrostatic signal.
7. the Parameter Measuring of the powder flowing based on array type electrostatic sensor method, it is characterized in that, utilize grain flow can produce the phenomenon of similar electrostatic induction signal through adjacent electrode, multichannel electrostatic signal in same electrostatic induction unit is carried out synchronized sampling, adopt the transit time between cross correlation algorithm acquisition upstream and downstream electrostatic signal, then according to the space length between electrode, try to achieve the particle instantaneous velocity; Utilize the dull correlativity of electrostatic signal intensity and granule density, calculate the relative volume concentration of particle by the root-mean-square value of electrostatic signal; Measure instantaneous velocity and the instantaneous concentration of particle in its local space of living in each electrostatic induction unit,, by all local messages in pipeline are merged, obtain space mean speed, space average concentration and the instantaneous mass/volumetric flow rate of particle in pipeline.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104316113A (en) * | 2014-11-20 | 2015-01-28 | 北京华清茵蓝科技有限公司 | Gas-solid multiphase flow online measurement device and method based on arc-shaped electrostatic electrode arrays |
| CN104764493A (en) * | 2015-04-20 | 2015-07-08 | 华北电力大学 | Fluidized bed solid particle detection device and method based on mesh electrostatic sensor |
| CN105628571A (en) * | 2016-03-29 | 2016-06-01 | 华北电力大学 | Fluidized bed mixed particle detection device and method based on electrostatic and photoelectric sensor |
| CN105652033A (en) * | 2016-03-15 | 2016-06-08 | 西安理工大学 | Device and method for measuring particle velocity field based on spider-web-type electrostatic sensor |
| CN105758657A (en) * | 2016-04-12 | 2016-07-13 | 华北电力大学 | Precision seed sowing device work performance on-line detection device based on electrostatic sensor |
| CN106124039A (en) * | 2016-07-15 | 2016-11-16 | 华北电力大学 | A kind of transmission band vibration monitoring device based on electrostatic transducer and method |
| CN107664588A (en) * | 2017-11-07 | 2018-02-06 | 北京华清茵蓝科技有限公司 | Isokinetic sample of pulverized coal method and sampler |
| CN108398606A (en) * | 2018-05-03 | 2018-08-14 | 扬州大学 | A kind of charged distribution measurement method of Geldart-D particle rolling particles and measuring device |
| CN109823838A (en) * | 2019-01-22 | 2019-05-31 | 太原市海通自动化技术有限公司 | A kind of method and device carrying out the tachometric survey of coal dust pneumatic conveying using novel electrostatic sensor |
| CN110518825A (en) * | 2019-08-05 | 2019-11-29 | 兰州大学 | A kind of power generation collection device based on insulated particle |
| CN112997083A (en) * | 2018-10-30 | 2021-06-18 | 罗伯特·博世有限公司 | Method and device for determining the speed of a fluid flow in the region of a particle sensor |
| CN114966097A (en) * | 2022-04-26 | 2022-08-30 | 东南大学 | Flue gas flow velocity field measuring system and method based on invasive electrostatic sensor array |
| CN115452923A (en) * | 2022-09-19 | 2022-12-09 | 中国科学院半导体研究所 | Flue gas flow pattern recognition method and device based on electrostatic sensor |
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| CN104316113A (en) * | 2014-11-20 | 2015-01-28 | 北京华清茵蓝科技有限公司 | Gas-solid multiphase flow online measurement device and method based on arc-shaped electrostatic electrode arrays |
| CN104764493A (en) * | 2015-04-20 | 2015-07-08 | 华北电力大学 | Fluidized bed solid particle detection device and method based on mesh electrostatic sensor |
| CN104764493B (en) * | 2015-04-20 | 2017-08-04 | 华北电力大学 | Fluid bed solids grain testing apparatus and method based on netted electrostatic sensor |
| CN105652033A (en) * | 2016-03-15 | 2016-06-08 | 西安理工大学 | Device and method for measuring particle velocity field based on spider-web-type electrostatic sensor |
| CN105652033B (en) * | 2016-03-15 | 2018-11-09 | 西安理工大学 | The measuring device and method of Particle Velocity based on spider net type electrostatic transducer |
| CN105628571A (en) * | 2016-03-29 | 2016-06-01 | 华北电力大学 | Fluidized bed mixed particle detection device and method based on electrostatic and photoelectric sensor |
| CN105758657B (en) * | 2016-04-12 | 2019-02-05 | 华北电力大学 | Precision seeder working performance on-line measuring device based on electrostatic transducer |
| CN105758657A (en) * | 2016-04-12 | 2016-07-13 | 华北电力大学 | Precision seed sowing device work performance on-line detection device based on electrostatic sensor |
| CN106124039A (en) * | 2016-07-15 | 2016-11-16 | 华北电力大学 | A kind of transmission band vibration monitoring device based on electrostatic transducer and method |
| CN107664588A (en) * | 2017-11-07 | 2018-02-06 | 北京华清茵蓝科技有限公司 | Isokinetic sample of pulverized coal method and sampler |
| CN108398606A (en) * | 2018-05-03 | 2018-08-14 | 扬州大学 | A kind of charged distribution measurement method of Geldart-D particle rolling particles and measuring device |
| CN108398606B (en) * | 2018-05-03 | 2024-02-02 | 扬州大学 | Method and device for measuring charge distribution of pneumatic conveying two-phase flow particles |
| CN112997083A (en) * | 2018-10-30 | 2021-06-18 | 罗伯特·博世有限公司 | Method and device for determining the speed of a fluid flow in the region of a particle sensor |
| CN109823838A (en) * | 2019-01-22 | 2019-05-31 | 太原市海通自动化技术有限公司 | A kind of method and device carrying out the tachometric survey of coal dust pneumatic conveying using novel electrostatic sensor |
| CN110518825A (en) * | 2019-08-05 | 2019-11-29 | 兰州大学 | A kind of power generation collection device based on insulated particle |
| CN114966097A (en) * | 2022-04-26 | 2022-08-30 | 东南大学 | Flue gas flow velocity field measuring system and method based on invasive electrostatic sensor array |
| CN115452923A (en) * | 2022-09-19 | 2022-12-09 | 中国科学院半导体研究所 | Flue gas flow pattern recognition method and device based on electrostatic sensor |
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