CN1888828A - Capacity step-by-step detection sensor - Google Patents
Capacity step-by-step detection sensor Download PDFInfo
- Publication number
- CN1888828A CN1888828A CN 200510080044 CN200510080044A CN1888828A CN 1888828 A CN1888828 A CN 1888828A CN 200510080044 CN200510080044 CN 200510080044 CN 200510080044 A CN200510080044 A CN 200510080044A CN 1888828 A CN1888828 A CN 1888828A
- Authority
- CN
- China
- Prior art keywords
- electrode
- circuit
- ring electrode
- detection sensor
- lead
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
A capacitance type sensor with examination layer by layer, includes the detecting pole of the sensor and the transmitting implement, the detecting pole including: the sealing groupware for top and bottom, the insulated protecting tube connecting with the sealing groupware, the ring-like electrode in the tube that is same in length, same in surface and insulate in order, at least one group serial selection unit circuit that connects with the pole down-lead, the serial selection unit circuit connects with the transmitting implement out of the detecting pole; the transmitting implement including: capacitance signal detecting circuit, the operation amplifier, the single-chip, and the RS485 interface.
Description
Technical field
The present invention relates to a kind of non electrical quantity survey technology, particularly a kind of capacity step-by-step detection sensor.
Background technology
Just begun to show some at home since the nineties and be intended to solve the invention of such as the variation of humidity of materials, temperature, density etc. the influence of capacitance object position sensor measuring accuracy, as number of patent application is 91108963.2 " level-sensing device ", has proposed to adopt the method for multi-electrode compensation.Because the influence of the sensor that proposes in this method existence lead-in wire distributed capacitance and electrode edge effect are to the interference and the influence of measuring accuracy, have to electrode and lead-in wire shielding in layer, the insulation of layer upon layer, its structure and technology are all very complicated as a result, cost is high, and the technology implementation method falls behind; Also having the patent No. is 94100133.4 " a kind of sectional capacitance formula thing position detecting method ", has proposed the level meter method of calculationing of a sectional capacitance method, still should the proposition method only be confined to the application to the individual event material surface measurement.The paper that " multipole plate capacitance level transducer " arranged in recent years proposes to adopt multipole plate capacitor sampling, determines the absolute depth and the interface liquid level of multiple liquid in the closed container with the standardization method of difference.Realization and computing method that this paper proposes are a kind of Utopian theory state, lack understanding to using on-the-spot complex working condition.
At present, the capacitance level gauge of widely applying in the oil field also rests on an overall electrode and tank skin and forms detection electric capacity, measures the variation of liquid level with the variation of this electric capacity, owing to be subjected to the influence of dielectric coefficient, the detection error is big, and function singleness, can only detect single liquid level.For example: after Daqing oil field entered tertiary phase, the oil field generally adopted polymer flooding and other chemical methodes to improve crude production rate.Be accompanied by the continuous application of chemical recovery new technology, new technology, the oil field is in the treatment process link to extraction liquid, and association has gone out new technical matters.Be in particular in profit and the increasing far away in the past of the mixed layer ratio of sulfide in the production slurry tank, traditional ball float dipping of always continuing to use also can't accurately detect actual core intersection, cause from management view and can't accurately add up production output, in addition, mix after layer strengthens settling efficiency is reduced, form vicious cycle; Deviate from process procedure at free water, can't accurately grasp the reasonable input of emulsion breaker; Lack to collapse in the electrical dewatering link and drag effective early warning technology means, often accident stops production, and can't guarantee steady production; Conventional condenser liquid level, interface level measurement instrument in usefulness can not adapt to above-mentioned application conditions in a large number, can't accurately reflect a jar interior truth, can not guarantee the needs of oil field ordinary production management.Press for a kind of novel detection technique and solved the problems referred to above.In order to solve the influence of mixolimnion to producing, the research dynamics of mixing layer medicament to eliminating has been strengthened in the oil field.But also lack the reaction effect of a kind of detection technique means effectively after and carry out online detection dispensing opportunity and dispensing.
Summary of the invention
The purpose of this invention is to provide a kind of capacity step-by-step detection sensor that can accurately measure mixolimnion or multi phase interface, the compact conformation of this sensor, dependable performance, the precision height, purposes is wide.
For achieving the above object the present invention by the following technical solutions: a kind of capacity step-by-step detection sensor, it comprises: sensor rapier and transmitter, described rapier comprises: the upper-lower seal assembly, the insulating protection pipe that joins with the upper-lower seal assembly, each segment length of arranging in order is housed in the pipe to be equated, surface area equates, and the ring electrode of mutually insulated, has one group of serial gating unit circuit that links to each other with contact conductor in the ring electrode chamber at least, the extension line of serial gating circuit unit and the transmitter of rapier outside join, and described transmitter comprises the capacitance signal testing circuit, operational amplifier, single-chip microcomputer, the RS485 interface.
Public pole that form to measure electric capacity with the layering potential electrode can be and measure utmost point parallel pole side by side, and external annular pipe formula electrode can also be a tank skin or greatly.
In order in the ring electrode of Pai Lieing, the top electrode and bottom electrode all connect shielding.
The serial gating circuit is made of the combine analog on-off circuit; Each electrode of gating does not all connect shielding.
Ring electrode is to be contained on the nylon joint of band boss in the described insulating protection pipe, insulate between two electrodes, the ring electrode lead-in wire is connected with the lead-in wire of the serial gating unit circuit that is positioned at nylon joint inboard, insulating protection pipe two ends are separately installed with clamping sleeve, be equipped with on the clamping sleeve with the O-ring seal of clamping sleeve close fit and on compress core, clamping sleeve is connected with the top gland, and ring flange is connected with the top gland, and the rapier lead-in wire is connected with transmitter by gland center, top.
Advantage of the present invention is: adopt digital circuit technique, Analogical Circuit Technique, singlechip technology combines and realizes that serial detects, potential electrode is by the multistage equal in length, the electrode of surface area unanimity is linked in sequence, come each interval is detected respectively by same testing circuit, shortened the detection range, improved the detection resolving power; Each interval electric capacitance change is main relevant with the dielectric coefficient of measured medium, if what each interval was measured is with a kind of medium, then testing result also should be consistent, otherwise then have than big-difference, therefore utilize the real-time detected value of each interval just can distribute and make analysis and judgement calculating, realize the measurement of single-phase or multi phase interface the aspect of medium; Utilize each interval detection numerical value to combine and to measure mixolimnion thickness and water percentage or the like with known or laboratory calibrating parameters.Structurally, adopted rigidity and around two kinds of electrodes of property, easy transportation and installation can be satisfied the detection needs of different ranges.Manufacture craft is simple, compact conformation, and dependable performance, the precision height, purposes is wide.
Description of drawings
Fig. 1 a: sensor rapier structural drawing of the present invention (first half)
Fig. 1 b: sensor rapier structural drawing of the present invention (Lower Half)
Fig. 2: the clamping sleeve structural drawing among Fig. 1
Fig. 3: compress core, ring structure figure among Fig. 1
Fig. 4; Around property electrode structure synoptic diagram
The wiring layout of Fig. 5 a: Fig. 4
Fig. 5 b: A-A sectional view among Fig. 5 a
Fig. 6: serial gating unit circuit of the present invention
Fig. 7: circuit block diagram of the present invention
Fig. 1 a, Fig. 1 b, Fig. 2, Fig. 3, Fig. 4, Fig. 5 a, among Fig. 5 b, as the electrode that detects usefulness is ring electrode, it can be rigidity or around property electrode 18, adjacent two around the property electrode be installed in the band boss nylon joint 17 on, insulate between two electrodes, nylon joint 17 connects a reed 14, reed is the halfround bar slice type, its two ends lay respectively at the nylon joint inboard and the nylon joint outside, when joint and the outside when the property electrode is tightened, reed with around property electrode close fit, it is positioned at the reed of nylon joint inboard, joins by lead-in wire and serial detection cell circuit 15 lead-in wire that is positioned at nylon joint inboard or electrode ring cavity.
Around the outside of property electrode is Teflon insulating protection pipe 12, and the two ends of protecting tube 12 are separately installed with clamping sleeve 11, and the O-ring seal 9 with the clamping sleeve close fit is housed on the clamping sleeve, compress core 8 on reaching, clamping sleeve 11 is connected with top gland 3, and top gland 3 is connected with ring flange 6, among the figure, 4 is locking spring, 2,5,7 are respectively O-ring seal, and 10 is back-moving spring, 13 is insulator, 16 under compress core, 19 is set nut, 20 is weight.
Among Fig. 6, each is measured and is distributed on the differing heights of sensor rapier with electrode, by computer control U
1(164), control clock, reset and gating (A, B), at U
1In, it has 8 output terminals, i.e. Q
0, Q
1, Q
2, Q
3, Q
4, Q
5, Q
6, Q
7, the potential electrode lead-in wire meets analog switching circuit U
2A(4053) X, Y, Z end, one group of element circuit has three 4053 (U
2A, U
2B, U
2C), they are subjected to U respectively
1Q
0, Q
1, Q
2, Q
3, Q
4, Q
5, Q
6, Q
7Control, if when the height of measuring is higher, can adopt many groups by 164 and 4053 serial gating unit circuit and the combination of electrodes of forming, wherein relevant clock, reset, the output of 5 volts of power supplys, ground connection, all potential electrode is outside the parallel connection, the signal of described serial gating (A/B) is concatenated into next group by last one group.
Among Fig. 7,21 is the sensor rapier, and 18 is the ring electrode in the rapier, and 26 is public pole, 15 are the serial gating unit, and 22 is the capacitance signal testing circuit, and 23 is operational amplifier, 24 is single-chip microcomputer, and 25 is the RS485 bus interface, and bus interface connects special-purpose secondary instrument or computing machine.
Testing process: realize the serial measurement by the gating unit circuit of Single-chip Controlling driving sensor rapier, with same capacitance signal testing circuit the electric capacity information of each interval is converted into voltage signal in order, in order to distinguish different media, can detect respectively with different detection sensitivities.Detect after operational amplifier carries out gain-adjusted, the A/D of process single-chip microcomputer inside is converted into digital signal, by the output of RS485 bus interface, connects special-purpose secondary instrument or Computer Processing.
Data analysis:
1, in the thing position-finding, need the zero point and the full scale of calibration measurements instrument:
The interval measured value that no measured medium distributes is exactly a relative zero benchmark;
The interval measured value that full measured medium distributes is exactly a relative full scale benchmark;
The length of cell electrode (known) is exactly a range benchmark.
2, measured medium is in the distribution situation (value differentiation) of different layers position height (known):
Value is identical, and-------medium is identical;
Value difference------medium difference, composition difference, water percentage not equal;
The dynamic changing process of each interval measured value (different period) ... the process of sedimentation separation changes, and the process of combination reaction changes.
Combine with Given information and laboratory calibration information according to above multidata real-time information, realize multiple measuring ability.
Claims (7)
1, a kind of capacity step-by-step detection sensor, it is characterized in that: it comprises: sensor rapier and transmitter, described rapier comprises: the upper-lower seal assembly, the insulating protection pipe that joins with the upper-lower seal assembly, each segment length of arranging in order is housed in the pipe to be equated, surface area equates, and the ring electrode of mutually insulated, has one group of serial gating unit circuit that links to each other with contact conductor in the ring electrode chamber at least, the extension line of serial gating circuit unit and the transmitter of rapier outside join, and described transmitter comprises the capacitance signal testing circuit, operational amplifier, single-chip microcomputer, the RS485 bus.
2, a kind of capacity step-by-step detection sensor according to claim 1 is characterized in that: the described serial gating unit circuit that links to each other with contact conductor is during more than one group, and the signal of serial gating is concatenated into next group by last one group.
3, a kind of capacity step-by-step detection sensor according to claim 1 and 2 is characterized in that: in the described ring electrode of arranging in order, the top electrode and bottom electrode all connect shielding.
4, a kind of capacity step-by-step detection sensor according to claim 1 and 2 is characterized in that: described serial gating circuit is made of the combine analog on-off circuit; Each electrode of gating does not all connect shielding.
5, a kind of capacity step-by-step detection sensor according to claim 1 and 2, it is characterized in that: ring electrode is to be contained on the nylon joint of band boss in the described insulating protection pipe, insulate between two electrodes, the ring electrode lead-in wire is connected with the lead-in wire of the serial gating unit circuit that is positioned at nylon joint inboard, insulating protection pipe two ends are separately installed with clamping sleeve, be equipped with on the clamping sleeve with the O-ring seal of clamping sleeve close fit and on compress core, clamping sleeve is connected with the top gland, ring flange is connected with the top gland, and the rapier lead-in wire is connected with transmitter by gland center, top.
6, according to claim 1 or 2 described a kind of capacity step-by-step detection sensors, it is characterized in that: described ring electrode is a rigidity or around the property electrode.
7, according to claim 1 or 2 described a kind of capacity step-by-step detection sensors, it is characterized in that: the ring electrode lead-in wire is a halfround bar slice type reed, its two ends lay respectively at the nylon joint inboard and the nylon joint outside, reed and ring electrode close fit, it is positioned at the reed of nylon joint inboard, is connected with serial gating unit circuit by lead-in wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510080044 CN1888828A (en) | 2005-06-28 | 2005-06-28 | Capacity step-by-step detection sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510080044 CN1888828A (en) | 2005-06-28 | 2005-06-28 | Capacity step-by-step detection sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1888828A true CN1888828A (en) | 2007-01-03 |
Family
ID=37578117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510080044 Pending CN1888828A (en) | 2005-06-28 | 2005-06-28 | Capacity step-by-step detection sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1888828A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102052951A (en) * | 2010-11-12 | 2011-05-11 | 天津大学 | Measurement device and method for multi-phase interface liquid level based on dual-modality sensor |
| CN102507668A (en) * | 2011-10-28 | 2012-06-20 | 中国矿业大学(北京) | Capacitance type concentrator flocculating setting detection and analysis system |
| CN102607668A (en) * | 2012-04-19 | 2012-07-25 | 北京航空航天大学 | Capacitance sensor |
| CN106092262A (en) * | 2016-07-29 | 2016-11-09 | 上海航天设备制造总厂 | Device for low-temperature insulation medium continuous liquid level measuring |
| CN107478295A (en) * | 2017-07-28 | 2017-12-15 | 深圳市鼎丰泰达科技有限公司 | A kind of method and device that liquid level data is obtained in capacitance level transducer |
| CN110036262A (en) * | 2016-12-05 | 2019-07-19 | 卓越有限公司 | Fill level position sensor |
-
2005
- 2005-06-28 CN CN 200510080044 patent/CN1888828A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102052951A (en) * | 2010-11-12 | 2011-05-11 | 天津大学 | Measurement device and method for multi-phase interface liquid level based on dual-modality sensor |
| CN102052951B (en) * | 2010-11-12 | 2012-07-04 | 天津大学 | Measurement device and method for multi-phase interface liquid level based on dual-modality sensor |
| CN102507668A (en) * | 2011-10-28 | 2012-06-20 | 中国矿业大学(北京) | Capacitance type concentrator flocculating setting detection and analysis system |
| CN102507668B (en) * | 2011-10-28 | 2013-08-21 | 中国矿业大学(北京) | Capacitance type concentrator flocculating setting detection and analysis system |
| CN102607668A (en) * | 2012-04-19 | 2012-07-25 | 北京航空航天大学 | Capacitance sensor |
| CN106092262A (en) * | 2016-07-29 | 2016-11-09 | 上海航天设备制造总厂 | Device for low-temperature insulation medium continuous liquid level measuring |
| CN106092262B (en) * | 2016-07-29 | 2019-05-31 | 上海航天设备制造总厂 | Device for low-temperature insulation medium continuous liquid level measuring |
| CN110036262A (en) * | 2016-12-05 | 2019-07-19 | 卓越有限公司 | Fill level position sensor |
| US11022474B2 (en) | 2016-12-05 | 2021-06-01 | Prominent Gmbh | Fill level sensor |
| CN107478295A (en) * | 2017-07-28 | 2017-12-15 | 深圳市鼎丰泰达科技有限公司 | A kind of method and device that liquid level data is obtained in capacitance level transducer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1888828A (en) | Capacity step-by-step detection sensor | |
| CN102959391B (en) | Electrode structure and apparatus for use in measuring oil-water constituents | |
| CN105387909B (en) | Voltage output mode fuel-quantity transducer | |
| CN105911106B (en) | The insulating gas condition detecting system of GIS device | |
| CN102200463A (en) | Liquid level linear measurement method based on impedance measurement | |
| CN101738240B (en) | Capacitance sensing type fuel meter | |
| EP0575312A4 (en) | Liquid level and composition sensor and method. | |
| CN1793788A (en) | Digital metal floater flowmeter based on proportional electric capacity angle measuring principle | |
| CN202974385U (en) | Capacitance liquid level transmitter | |
| CN103090929A (en) | Measurement method of liquid level and position of tank body | |
| CN113108865A (en) | Wireless water level monitoring system | |
| CN105486218B (en) | It is a kind of to monitor the smart material strain gauge and application that bituminous pavement strains | |
| CN2622681Y (en) | Self-calibration and capacitor type level gage | |
| CN203298828U (en) | Device for measuring liquid level and boundary level of tank body | |
| CN202869600U (en) | Multi-section admittance liquid level interfacial instrument without metrical dead zones | |
| CN101038199A (en) | Carbon fiber composite pipe electrode capacitance type oil level sensor and instrument used in same | |
| CN102288651A (en) | Capacitance sensor for detecting moisture content of static crude oil | |
| CN201382799Y (en) | Capacity transduction type fuel oil metering instrument | |
| CN202285009U (en) | Capacitance sensor for detecting static state crude oil moisture content | |
| CN2643294Y (en) | Capacitor type liquid level sensor | |
| CN1033604C (en) | Sectional capacitance object-position detecting method and detecting probe | |
| CN103868567A (en) | Capacitance liquid level transmitter | |
| CN86200819U (en) | Capacitance rapid moisture apparatus | |
| CN2851576Y (en) | Compensation type water holdup instrument | |
| CN1301399C (en) | Three-parameter integration capacitance sensor for automobile fuel oil meter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |