CN101393461A - Radio frequency admittance admittance level controller - Google Patents
Radio frequency admittance admittance level controller Download PDFInfo
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- CN101393461A CN101393461A CNA2007100463018A CN200710046301A CN101393461A CN 101393461 A CN101393461 A CN 101393461A CN A2007100463018 A CNA2007100463018 A CN A2007100463018A CN 200710046301 A CN200710046301 A CN 200710046301A CN 101393461 A CN101393461 A CN 101393461A
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- utmost point
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Abstract
This invention discloses a radio-frequency transadmittance level controller, which comprises a probe, a connecting head, and a casing. The radio-frequency transadmittance level controller is characterized in that the probe consists of a measuring pole and a protecting electrode, wherein the measuring pole is an elongated metal rod, the outside of the metal rod is partially provided with an insulating layer, and the protecting electrode is a metal sleeve, the outside of the sleeve is partially provided with the insulating layer and the measuring pole is sleeved in the protecting pole; a connector is of a hollow tubular shape, the inside of the connector is sleeved with the probe, and one end of the connector is in threaded connection with a shell; the inside of the shell is provided with a control member; and the measuring pole and the protecting electrode are respectively connected with the control member through conducting wires. With reasonable design and simple structure, the radio-frequency transadmittance level controller adopts the technology for measuring the radio-frequency transadmittance level to add an electrode (the protecting pole) on the probe to prevent the measuring pole from charging adhesive materials and statically releasing to the ground, thereby completely solving the problem of an error warning caused by coating of the probe, having correct measurement on liquids, slurries, granules or interfaces, high stability and convenient debugging, and needing no maintenance after installation.
Description
Technical field
The present invention relates to the measuring and controlling instrument instruments and meters, specifically a kind of radio frequency admittance admittance level controller.
Background technology
At present, the industrial instrument that is used for measuring the thing position generally all is to adopt capacitive level probe, and it utilizes the measured medium changes in capacitance to measure the height of thing position.The insertion of metal probe is filled in the container of material, and the metal probe is as a utmost point of electric capacity, and chamber wall is as another utmost point of electric capacity.Two interelectrode media are material and top gas thereof.Because the DIELECTRIC CONSTANT 1 of material is different with the DIELECTRIC CONSTANT 2 of air above the material, such as: ε 1〉ε 2, then when material raise, total dielectric constant values strengthened thereby the electric capacity increase thereupon between two electrodes.Otherwise when material decline, the ε value reduces, and electric capacity also reduces.Therefore can measure the height of material by the variation of two interelectrode electric capacitys.Its sensitivity depends primarily on the difference of two kinds of specific inductive capacity, and has only the constant of ε 1 and ε 2 could guarantee that level gauging is accurate.Though the most medium of capacitive level probe energy measurement, but the level gauging to the material that sticks material, powder and static electrification is not accurate enough, after material is attached on the probe, total dielectric constant values strengthens thereby the electric capacity increase thereupon between two electrodes, signal on the probe is by the material generation electric current that charges over the ground, and level meter will send alerting signal.Probe is gone up rather than true thing position but this is only because material is attached on, so false alarm very easily occurs.Along with the raising of industrial automatization, existing capacitive level probe has not obviously satisfied the level gauging of various media, especially sticks the level gauging of material, powder and static electrification material.
Summary of the invention
A kind of radio frequency admittance admittance level controller of providing at the deficiencies in the prior art is provided; it can carry out reliably the thing position of sticking material, powder and static electrification material, measure accurately; the measurement that is liquid, slurry, particle or interface is all very accurate; the influence that not changed by bridging, temperature, pressure, density, temperature even chemical characteristic; thoroughly solved the false alarm that probe causes because of bridging; stability is high, debug simple and conveniently, installs afterwards non-maintaining.
The object of the present invention is achieved like this: a kind of radio frequency admittance admittance level controller, comprise probe, connector, watchcase, characteristics are that probe is by measuring the utmost point, protecting the utmost point to form, measure very elongated metallic rod, the Metallic rod outside is arranged with insulation course, protection is a metal sleeve very, and jacket exterior is arranged with insulation course, measures the utmost point and is sleeved in the protection extremely; Connector is a hollow tubular, suit probe in it, and an end of connector is threaded with housing; Be provided with control piece in the housing; Measure the utmost point, protect the utmost point to be connected with control piece respectively by lead.
Described control piece comprises power circuit, oscillatory circuit, debug circuit, control circuit, relay, and oscillatory circuit is connected in series debug circuit, control circuit, relay successively; Power circuit connects oscillatory circuit, control circuit respectively; Between oscillatory circuit two input ends and be connected to electrostatic devices, oscillatory circuit one input end is connected to the ground connection electrostatic devices.
The present invention is reasonable in design; simple in structure; it adopts the radio frequency admittance measuring technique; increasing an electrode on probe stops potential electrode to the charging of sticking material and the release over the ground of static; avoided since bridging, temperature, pressure, density, temperature variation to the influence of level gauging; thoroughly solved the false alarm that probe causes because of bridging; it can be measured accurately to the thing position of sticking material, powder and static electrification material; the measurement that is liquid, slurry, particle or interface is all very accurate; stability is high; debugging is convenient, and is non-maintaining after installing.
Description of drawings
Fig. 1 is a structural representation of the present invention
Fig. 2 is the structural representation of control piece of the present invention
Embodiment
Consult Fig. 1; the present invention includes probe 1; connector 5; watchcase 6; probe 1 is by measuring the utmost point 2; the protection utmost point 3 is formed; measuring the utmost point 2 is elongated metallic rod; the Metallic rod outside is arranged with insulation course 4; the protection utmost point 3 is a metal sleeve; jacket exterior is arranged with insulation course 7; insulation course 4; 7 is the PPS insulating material; measure the utmost point 2 and be sleeved in the protection utmost point 3, the xsect of probe 1 is four layers of concentric structure, is followed successively by insulation course 4 outward from the measurement utmost point 2 in the center of circle; the protection utmost point 3; insulation course 7; connector 5 is a hollow tubular; suit probe 1 in it, an end of connector 5 is threaded with housing 6, is provided with control piece 8 in the housing 6; measure the utmost point 2; the protection utmost point 3 is connected with control piece 8 respectively by lead, and the outside of watchcase 6 is provided with the earth lead that is connected with controller 8.
Consult Fig. 2; control piece 8 comprises power circuit 9, oscillatory circuit 10, debug circuit 11, control circuit 12, relay 13; oscillatory circuit 10 is connected in series debug circuit 11, control circuit 12, relay 13 successively; power circuit 9 connects oscillatory circuit 10, control circuit 12 respectively; power to entire circuit; between two input ends 14,15 of oscillatory circuit 10 and be connected to electrostatic devices 16; oscillatory circuit 10 1 input ends 15 are connected to ground connection electrostatic devices 17; input end 14 connects the protection utmost point 3, and input end 15 connects measures the utmost point 2.
The present invention is work like this: probe 1 insertion of the present invention is filled in the container of material; earth lead is fixed on the chamber wall; power circuit 9 just; negative pole connects the 220V alternating current or connects the 24V direct current; probe 1 and material; container forms a big electric capacity; probe 1 and chamber wall just just are being equivalent to electric capacity; negative the two poles of the earth; because the signal frequency on measuring the utmost point 2 and protecting the utmost point 3 is consistent with size; so when material is attached on the probe 1; measure between the utmost point 2 and the protection utmost point 3 and do not have electric potential difference; even pop one's head on 1 after the bridging its impedance also less; do not have electric current and pass through, circuit measuring to just measure 2 pairs of chamber walls of the utmost point () electric current.Can block current flow return and flow to chamber wall because have the protection utmost point 3 of screen layer effect, thereby can only flow to chamber wall by tested material through measuring the utmost point 2 vagabond current along probe 1.Though have electric potential difference between the protection utmost point 3 and the chamber wall, there is electric current to flow through between the two, this electric current is not measured, just can not influence the result of measurement yet.So just will measure the utmost point 2 and protect, not be subjected to the influence of bridging.Have only when the material in the container rises really and touch the measurement utmost point 2, measure the tested electric current of formation between the utmost point 2 ability and the earth by tested material, circuit just can detect this electric current, this current signal after oscillatory circuit 10, debug circuit 11, control circuit 12 handled by lead-out terminal 18 output alarm signals of relay 13.
Claims (2)
1, a kind of radio frequency admittance admittance level controller, comprise probe (1), connector (5), housing (6), it is characterized in that probe (1) is by measuring the utmost point (2), protecting the utmost point (3) to form, measuring the utmost point (2) is elongated metallic rod, the Metallic rod outside is arranged with insulation course (4), the protection utmost point (3) is a metal sleeve, and jacket exterior is arranged with insulation course (7), measures the utmost point (2) and is sleeved in the protection utmost point (3); Connector (5) is a hollow tubular, suit probe (1) in it, and an end of connector (5) is threaded with housing (6); Be provided with control piece (8) in the housing (6); Measure the utmost point (2), protect the utmost point (3) to be connected with control piece (8) respectively by lead.
2, according to the described radio frequency admittance admittance level controller of claim 1, it is characterized in that described control piece (8) comprises power circuit (9), oscillatory circuit (10), debug circuit (11), control circuit (12), relay (13), oscillatory circuit (10) is connected in series debug circuit (11), control circuit (12), relay (13) successively; Power circuit (9) connects oscillatory circuit (10), control circuit (12) respectively; Between oscillatory circuit (10) two input ends (14), (15) and be connected to electrostatic devices (16), oscillatory circuit (10) one input ends (15) are connected to ground connection electrostatic devices (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100463018A CN101393461A (en) | 2007-09-21 | 2007-09-21 | Radio frequency admittance admittance level controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100463018A CN101393461A (en) | 2007-09-21 | 2007-09-21 | Radio frequency admittance admittance level controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101393461A true CN101393461A (en) | 2009-03-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100463018A Pending CN101393461A (en) | 2007-09-21 | 2007-09-21 | Radio frequency admittance admittance level controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101393461A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102538905A (en) * | 2010-12-08 | 2012-07-04 | 上海自动化仪表股份有限公司 | Capacitive radio-frequency admittance level transmitter and operating method thereof |
| CN103090923A (en) * | 2013-01-16 | 2013-05-08 | 江苏苏仪集团有限公司 | Material position wireless measurement instrument of ash bank |
| CN104266713A (en) * | 2014-10-08 | 2015-01-07 | 湖南菲尔斯特传感器有限公司 | Oil level sensor probe connecting plate |
| CN107290025A (en) * | 2016-03-31 | 2017-10-24 | 中核新能核工业工程有限责任公司 | A kind of anti-deep-etching sensor of high temperature resistance applied to radio frequency admittance level-sensing device |
| CN112650320A (en) * | 2020-11-30 | 2021-04-13 | 太极集团重庆涪陵制药厂有限公司 | Alcohol precipitation control method |
-
2007
- 2007-09-21 CN CNA2007100463018A patent/CN101393461A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102538905A (en) * | 2010-12-08 | 2012-07-04 | 上海自动化仪表股份有限公司 | Capacitive radio-frequency admittance level transmitter and operating method thereof |
| CN103090923A (en) * | 2013-01-16 | 2013-05-08 | 江苏苏仪集团有限公司 | Material position wireless measurement instrument of ash bank |
| CN104266713A (en) * | 2014-10-08 | 2015-01-07 | 湖南菲尔斯特传感器有限公司 | Oil level sensor probe connecting plate |
| CN104266713B (en) * | 2014-10-08 | 2019-01-11 | 湖南菲尔斯特传感器有限公司 | A kind of fuel level sensor probe terminal pad |
| CN107290025A (en) * | 2016-03-31 | 2017-10-24 | 中核新能核工业工程有限责任公司 | A kind of anti-deep-etching sensor of high temperature resistance applied to radio frequency admittance level-sensing device |
| CN107290025B (en) * | 2016-03-31 | 2019-12-20 | 中核新能核工业工程有限责任公司 | High-temperature-resistant and strong-corrosion-resistant sensor applied to radio frequency admittance level meter |
| CN112650320A (en) * | 2020-11-30 | 2021-04-13 | 太极集团重庆涪陵制药厂有限公司 | Alcohol precipitation control method |
| CN112650320B (en) * | 2020-11-30 | 2022-05-31 | 太极集团重庆涪陵制药厂有限公司 | Alcohol precipitation control method |
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Legal Events
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090325 |