CN209214689U - A kind of capacitor Measurement device - Google Patents
A kind of capacitor Measurement device Download PDFInfo
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- CN209214689U CN209214689U CN201821874492.7U CN201821874492U CN209214689U CN 209214689 U CN209214689 U CN 209214689U CN 201821874492 U CN201821874492 U CN 201821874492U CN 209214689 U CN209214689 U CN 209214689U
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Abstract
The utility model belongs to multiphase flow detection technique field, is related to Measurement device.A kind of capacitor Measurement device is provided with bucking electrode between the capacitive array sensor and spiral capacitance sensor including the capacitive array sensor and spiral capacitance sensor being successively set on pipeline.The device of the utility model, corresponding speed is fast, implementation is good, low cost, environmental suitability are strong, is suitable for various severe industrial environments.Solid concentration measurement, concentration and the speed of any time gas-solid rolling particles object can be measured simultaneously, while conversing mass flow in certain moment pipeline.
Description
Technical field
The utility model belongs to multiphase flow detection technique field, is related to Measurement device.
Background technique
In industrial circles such as metallurgy, power generation, chemical industry, the demands such as solid particle transports, real time on-line monitoring, metering are more,
Industry can more accurately be improved in the measurement of the flow pattern monitoring of flow process, mass flow etc. to gas-solid particulate matter
The process decision efficiency of production.Therefore, in the monitoring measurement process of Dual-Phrase Distribution of Gas olid, the flowing velocity of solid particulate matter, flowing
The parameters such as section concentration and mass flow are the important components of Dual-Phrase Distribution of Gas olid industry monitoring.
In the monitoring of two phase flow, metering process, by many factors such as environment temperature, humidity, gas-phase transport speed
It influences, concentration, the speed of solid phase particles object on conveyance conduit section etc. is extremely uneven.Therefore, to the metering of Dual-Phrase Distribution of Gas olid,
Monitoring brings larger difficulty, and in the flow process of particulate matter, if insufficient consideration pipeline section solid particulate matter
The factors such as concentration and speed, will certainly produce bigger effect measurement result.
Dual-Phrase Distribution of Gas olid monitoring and metering method mainly has a three categories: 1, it is based on physics metering method, and it, should such as Weighing method
Class method design structure is simply easy to operate, at present using relatively broad.But the property be transformed of this method, system compatibility
It is poor, it is equally poor for the adaptability of environment, it is unfavorable for overall intelligence upgrading, transformation of equipment etc..2, based on gamma-rays etc.
Ray method, this method precision is higher, and the system integration is higher.But this method has radiation, cost height, environmental requirement harsh
The disadvantages of, therefore it is unfavorable for heavy industrialization application.3, the metering method based on electricity, such as capacitor, electrostatic detection method.
Such method structure is simple, and cost is relatively low, preferable for environmental suitability, while possessing higher system globe area, therefore has
There is preferable development prospect, but this method still there are many areas for improvement.
Some disadvantages existing for the instrument and equipment of existing electrical principles:
1, electrostatic transducer can realize particle velocity measurement, and this method is based primarily upon the collision of solid particulate matter, friction etc.
The charge of generation generates charge inducing in turn, therefore when solid particulate matter measurement humidity is larger, can generate in the presence of no charge
Situation, and then measurement is caused to be failed.Meanwhile this method needs abundant friction, the collision of solid particulate matter, therefore is easy to appear survey
When amount charge generate it is uneven, insufficient and the case where influence monitoring result.
2, when capacitance sensor measures solid concentration, simple capacitance sensor is mostly used, therefore acquired results can only be counted
Particle concentration is measured, measurement section particle concentration distribution cannot be effectively detected.
Utility model content
Based on defect existing in the prior art and deficiency, the utility model provides a kind of capacitor Measurement dress
It sets and method.
The utility model solve its technical problem the technical solution adopted is that: a kind of capacitor Measurement device,
Including the capacitive array sensor and spiral capacitance sensor being successively set on pipeline, the capacitive array sensor
Bucking electrode is provided between spiral capacitance sensor.
Further, the array type capacity electrode sensor includes electrode and bucking electrode；The electrode and screen
Electrode is covered to be arranged along pipeline peripheral wall interval.
Further, seal is provided with outside the capacitive array sensor, the seal is by exhausted
Edge material filled layer and its shielding case of outside composition.
Further, the spiral capacitance sensor includes that bucking electrode is equipped between two groups, two groups；Each group of spiral shell
Rotating capacitance sensor is made of spiral detecting electrode and spiral excitation electrode, and detecting electrode is relative to excitation electrode edge
Pipeline axial direction rotates 180 °.
A kind of capacitor Measurement device of the utility model has below beneficial to effect compared with prior art
Fruit:
1, the concentration detection portion of the utility model passes through spirit to gained capacitance signal using capacitive array sensor
The mode of sensitive matrix can obtain concentration distribution state of the particulate matter in pipeline, while respective concentration can also be calculated
Value.
2, concentration detection portion, to concentration calculation of the particulate matter in pipeline, by the way of weighting, gained concentration value is more
Add and stablizes, is accurate.
3, it tests the speed part, using double helix capacitance sensor, the measurement voltage signal in a manner of capacitor excitation, obtained survey
It is more stable to measure signal.
4, flow velocity is measured compared with electrostatic method, the humidity range of the surveyed solid particulate matter of this method is more extensive, greatly reduces
(electrostatic method is more demanding to solid particle humidity, needs tested particulate matter very for influence by particulate matter humidity to measurement result
It is dry).
Detailed description of the invention
Fig. 1 is the capacitor Measurement schematic device of the utility model；
Fig. 2 is capacitive array sensor sectional view；
Fig. 3 is spiral capacitance sensor sectional view.
Specific embodiment
The capacitor Measurement device of the utility model is carried out with reference to the accompanying drawings and examples further detailed
Thin elaboration.
As shown in Figure 1, the capacitor Measurement device of the utility model, including the array being arranged on pipeline
Capacitance sensor and two groups of spiral capacitance sensors.And on pipeline medium flow direction, the peace of capacitive array sensor
Holding position is located at the upstream of spiral capacitance sensor.Capacitive array sensor for measure pipeline inner solid particulate phase concentration and
Section concentration distribution；Spiral capacitance sensor is used to detect the mean flow rate of solid phase in pipeline.
As depicted in figs. 1 and 2, capacitive array sensor includes 12 plate electrodes 1, installation shielding electricity between adjacent electrode 1
Pole 2.In the outside of capacitive array sensor, it is provided with the insulation dress that insulating materials filled layer 4 and outer shield cover 5 form
It sets.The seal is connect with capacitive array sensor, plays a part of to shield interference signal.The inner and outer pipe of the seal
Diameter size can determine that detected fluid entrance 10 and detected fluid outlet 11 can be according to practical candidate particles objects according to the size of pipeline
The conditions such as pressure, temperature select connection type, connection type can according to need the following form that is processed as: screw thread, clip, method
Orchid etc..
Between the detected fluid entrance 10 and capacitive array sensor of pipeline, capacitive array sensor and spiral
Interregional bucking electrode 6 is provided between capacitance sensor and between two groups of spiral capacitance sensors, it is therefore an objective to reduce
Interfering with each other between signal.
As shown in figures 1 and 3, the certain effective distance in two groups of spiral capacitance sensor intervals；Every group includes 1 spiral
Formula detecting electrode 8 and 1 spirally motivates electrode 7, and detecting electrode 8 is rotated relative to excitation electrode 7 along pipeline axial direction
180°.Bucking electrode 9 between screw electrode is provided between detecting electrode 8 and excitation electrode 7.
The capacitor Measurement device working principle of the utility model is as follows:
According to the size of pipe under test, design measuring device size according to mode shown in FIG. 1, be tested solid particulate matter from
Tested pipeline section is entered at detected fluid entrance 10.
The measurement of concetration of capacitive array sensor: for particulate matter first by concentration measuring area, which is array
Electrode excitation measured zone, the region obtain 66 groups of pipeline section section capacitance in such a way that 12 groups of electrode cycles are motivated and detected,
Particle concentration at imaging formula (1) inverse outlet pipe inner section is directly utilized to be distributed according to surveyed capacitor, according to particle concentration
Distribution finds out the mean concentration of tested pipeline section particulate matter.
The tachometric survey of spiral capacitance sensor: after measurement of concetration, particulate matter enters first group of spiral capacitor
Sensor measurement region, the region form one group of capacitor by excitation electrode 7 and detecting electrode 8, among electrode between screw electrode
Bucking electrode 9 is spaced, and using in a certain moment t in the period region T, motivates the capacitance measurement signal between electrode 7 and detecting electrode 8
X (t) and particulate matter enter second group of spiral capacitance measured zone, the capacitance measurement between the area excitation electrode and detecting electrode
Signal y (t) does cross-correlation calculation.Correlation function time variable is obtained, while the time tm and two according to used in cross-correlation function
The distance between group electrode L, obtains speed V=L/tm.Thus surveyed regions particulate object speed is obtained.
In conjunction with the concentration and particulate matter speed of particulate matter, corresponding mass flow is calculated using calculation formula (6).
It should be noted that the length-width ratio of the electrode 1 of capacitive array sensor involved by the utility model, two groups of spirals
The bending angle of effective distance L, screw type electrode between formula capacitance sensor and the length of screw type electrode etc., require
According to actual measurement pipe design, not fixed dimension.
The capacitor Measurement method of the utility model, the specific steps are as follows:
Step 1, using pneumatic conveying particulate material as test object, when there is particle to flow through capacitive array sensor, pass through
Measure the capacitance between capacitive array sensor electrode pair；By following calculation method, to obtain array type capacity sensing
Solid phase mean concentration G and concentration distribution inside device:
According to concentration calculation formula, obtains particle concentration at section and is distributed g:
G=STC (1)
In formula, S is normalized sensitive field matrix, and C is is surveyed capacitance；
Section mean concentration G can be calculated according to concentration distribution g at gained section:
In formula, i=1~n is each computing unit number of pipeline section, and gi indicates solid particulate matter at each computing unit i
Concentration, Ai indicate that area at computing unit, A indicate pipeline section product；
Step 2, by being detected to the capacitance variations during particle flow, successively respectively from two groups of spiral capacitors
Signal x (t) and y (t) are measured at sensor, the cross-correlation function of signal may be expressed as:
In above formula, R (τ) is the cross-correlation function of delay time, and delay time corresponding to cross-correlation function maximum value is
Tm, it is known that the axially spaced-apart of upstream and downstream electrostatic transducer is L, then the speed V of the powder in one region of electrostatic transducer part are as follows:
V=L/tm (5)
By above formula, the flowing velocity V of solid phase particles is calculated, Particle flow speed can be found out in this way；
Step 3, according to capacitive array sensor obtain solid phase mean concentration G and pass through spiral capacitive sensing
The solid phase flowing velocity V that device obtains, the mass flow Qm of particle stream is calculated in conjunction with particle density ρ:
Qm=ρ VAG (6).
Claims (4)
1. a kind of capacitor Measurement device, it is characterised in that: including the array type capacity being successively set on pipeline
Sensor and spiral capacitance sensor are provided with bucking electrode between the electrode of the capacitive array sensor, spirally
Bucking electrode is provided between the electrode of capacitance sensor.
2. capacitor Measurement device according to claim 1, it is characterised in that: the array type capacity passes
The electrode and bucking electrode of sensor are arranged along pipeline peripheral wall interval.
3. capacitor Measurement device according to claim 2, it is characterised in that: passed in the array type capacity
Seal is provided with outside sensor, the seal is made of the shielding case of insulating materials filled layer and its outside.
4. capacitor Measurement device according to claim 1-3, it is characterised in that: the spiral
Formula capacitance sensor includes two groups；Each group of spiral capacitance sensor is by spiral detecting electrode and spiral excitation electrode group
At, and detecting electrode rotates 180 ° along pipeline axial direction relative to excitation electrode；It is arranged between detecting electrode and excitation electrode
Bucking electrode.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821874492.7U CN209214689U (en) | 2018-11-14 | 2018-11-14 | A kind of capacitor Measurement device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821874492.7U CN209214689U (en) | 2018-11-14 | 2018-11-14 | A kind of capacitor Measurement device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109374071A (en) * | 2018-11-14 | 2019-02-22 | 山东省科学院海洋仪器仪表研究所 | A kind of capacitor Measurement device and method |
| WO2022000874A1 (en) * | 2020-06-29 | 2022-01-06 | 山东省科学院海洋仪器仪表研究所 | Gas-solid two-phase flow measurement device and method for double-helix capacitor |
-
2018
- 2018-11-14 CN CN201821874492.7U patent/CN209214689U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109374071A (en) * | 2018-11-14 | 2019-02-22 | 山东省科学院海洋仪器仪表研究所 | A kind of capacitor Measurement device and method |
| WO2022000874A1 (en) * | 2020-06-29 | 2022-01-06 | 山东省科学院海洋仪器仪表研究所 | Gas-solid two-phase flow measurement device and method for double-helix capacitor |
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