CN105352562A - Induction type servo liquid metal liquid level measurement device and method - Google Patents
Induction type servo liquid metal liquid level measurement device and method Download PDFInfo
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- CN105352562A CN105352562A CN201510883299.4A CN201510883299A CN105352562A CN 105352562 A CN105352562 A CN 105352562A CN 201510883299 A CN201510883299 A CN 201510883299A CN 105352562 A CN105352562 A CN 105352562A
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Abstract
The invention relates to an induction type servo liquid metal liquid level measurement device and method. The device comprises a liquid level detector, a displacement sensor fixed to the liquid level detector, a servo motor controlling movement of the liquid level detector and the displacement sensor, a signal conversion and collection unit collecting signals of the liquid level detector and the displacement sensor and transmitting the signals to a controller, the controller controlling the servo motor according to the signals transmitted by the signal conversion and collection unit, and a detector power supply supplying power to the liquid level detector. By means of the induction type servo liquid metal liquid level measurement device and method, liquid level data can be measured in real time while the liquid metal liquid level changes, and engineering requirements are met. A measurement system is accurate in liquid level measurement, stable in measurement, small in maintenance amount, long in service life and free of measurement range limitation, temperature compensation does not need to be conducted, and the measurement device and method can be used in a liquid metal liquid level calibration device and continuously provide reference liquid level position data.
Description
Technical field
The present invention is specifically related to a kind of mutual inductance type servo liquid level of liquid metal measurement mechanism and method, belongs to level gauging field.
Background technology
Because liquid metal temperature is high, chemical property active, conventional liquid level gauge cannot be applied in liquid level of liquid metal fields of measurement.In order to obtain continuous print liquid level delta data, current liquid level of liquid metal measures general employing mutual inductance type liquid level gauge.Mutual inductance type servo liquid level of liquid metal measurement mechanism and Method And Principle identical with mutual inductance type liquid level gauge, be also the characteristic of the high conductivity based on liquid metal.According to Theory of Electromagnetic Field, when there being alternating current in the winding of former limit, induction electromotive force will be produced in secondary winding, the size of induction electromotive force can be subject to the impact around winding medium, the alternating flux of now former limit winding generation, one side and secondary winding interlinkage, inductive loop is produced on the other hand in liquid level gauge outer tube and measured medium, thus generation induced field, cause total magnetic flux to reduce, and then reduce the induction electromotive force of secondary winding.Sensitive element part is coiled in epimere and the hypomere of iron core, differential connection.When liquid level of liquid metal arrives sensitive element central area, bridge road reaches maximum uneven point, and now sensor output voltage is maximal value Em.When liquid level of liquid metal continues to rise, along with top winding is submerged, bridge road returns to equilibrium state again, and now sensor output voltage E returns to minimum value again.
The servo liquid of liquid metal is measured and find Chinese Patent Application No. 201210370050.X in open source literature data, what adopt is that metal probe automatic calibration induction sensitive element carries out liquid metal measurement, different from this liquid level gauge principle, and it needs directly to contact liquid metal.
Summary of the invention
The object of the present invention is to provide a kind of mutual inductance type servo liquid level of liquid metal measurement mechanism and method.Also the reference standard of all kinds of liquid level of liquid metal Measurement and calibration is can be used as, as solved the problem of calibrating of wide range mutual inductance type liquid level gauge while meeting engineer applied.
Particularly, the invention provides a kind of mutual inductance type servo liquid level of liquid metal measurement mechanism, described device comprises as lower component and structure:
Level sensor and the displacement transducer be fixed on level sensor;
Servomotor, controls the movement of described level sensor and displacement transducer;
Signal conversion collecting unit, collects described level sensor, the signal of displacement transducer transmission of signal to controller;
Controller, according to the signal that described signal conversion collecting unit transmits, controls servomotor;
Detector power supply, powers to described level sensor.
Further, mutual inductance type servo liquid level of liquid metal measurement mechanism as above, described level sensor comprises cable duct tube, is arranged on the iron core of cable duct tube one end, around the winding of described iron core and the stainless steel sleeve pipe that is enclosed within outside the sensitive element of above-mentioned three parts composition.
Further, mutual inductance type servo liquid level of liquid metal measurement mechanism as above, described level sensor comprises scrambler or position indicator further to obtain level change amount, realizes level gauging.
Further, mutual inductance type servo liquid level of liquid metal measurement mechanism as above, described servomotor controls the movement of level sensor by the lifting rope reel of series connection, lifting rope, wire rope wheel hub.
Further, mutual inductance type servo liquid level of liquid metal measurement mechanism as above, a described both ends of power balanced potentiometer in parallel.
Further, the present invention also provides a kind of mutual inductance type servo liquid level of liquid metal measuring method using device described above, and described method comprises the steps:
Using displacement sensor output voltage maximal value as setting value, the central horizontal of displacement transducer is in liquid level, when liquid level rises, displacement sensor output voltage sends the controller of servomotor to by signal conversion collecting unit, controller judges the variation tendency of voltage, controller sends instruction and drives rotating backward of servomotor, drives displacement transducer to rise until stop when described measurement output voltage reaches setting value; Vice versa, thus realize level sensor following liquid level; By the scrambler of level sensor or the variable quantity of position indicator acquisition liquid level, realize the measurement of liquid level of liquid metal.
The invention has the advantages that: measuring accuracy is high, precision can reach ± 2mm; Detector does not contact with liquid metal, can not destroy the sealing of container; Can use as with reference to standard scale, realize the demarcation to contactless wide range mutual inductance liquid level gauge; Timing signal can replace a large amount of traditional liquid level probes thus reduces equipment investment and use sodium amount.
Accompanying drawing explanation
Fig. 1 is level sensor structural representation of the present invention;
Fig. 2 is the winding circuit schematic diagram of level sensor of the present invention;
Fig. 3 is that displacement transducer output voltage floods the situation of change schematic diagram of height with liquid metal;
Fig. 4 is measurement mechanism principle of compositionality figure of the present invention;
Fig. 5 is servo liquid level of liquid metal measurement mechanism structural representation.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
Fig. 1 is level sensor structural representation of the present invention.Main is cladding materials with stainless steel, magnesium oxide is that two heart yearns in the twin-core sheathed cable 6 of insulation are coiled on iron core 2 epimere and hypomere respectively as winding 1A-2A, 1B-2B and 3A-4A, 3B-4B.The layout of winding 3 on iron core as shown in Figure 1.Sheathed cable is through in cable duct tube 1 and draws.Constitute the sensitive element 5 that mutual inductance type servo liquid level of liquid metal is measured.Sensitive element is inserted in the stainless steel sleeve pipe 4 of one end sealing, and this sleeve pipe is then immersed in liquid metal.Bridge road is as shown in Figure 2 formed by winding 1A-2A, 1B-2B, 3A-4A and 3B-4B.Bridge route frequency is the alternating current steady voltage plug U of 6kHz
1power supply.From the output voltage E of bridge road diagonal line fetch bit displacement sensor.
When the naked dew of sensitive element, do not flooded by liquid metal time, by adjusting the balanced potentiometer R that is connected in parallel on described power supply, make displacement transducer output voltage E be minimum value.When liquid level of liquid metal rises, along with No.1 winding is flooded by liquid metal, in liquid metal, produce inductive loop, 1A-2A, 1B-2B winding impedance is changed, cause bridge road further uneven.When liquid level of liquid metal arrives sensitive element central area M, bridge road reaches maximum uneven point, and now sensor output voltage is maximal value Em.When liquid level of liquid metal continues to rise, along with No.2 winding is flooded by liquid metal, bridge road returns to equilibrium state again, and now sensor output voltage E returns to minimum value again.Like this, can accurate align liquid metal liquid level.Fig. 3 indicates sensor output voltage floods height situation of change with liquid metal.No.1 and No.2 winding shown in Fig. 1 all adopts dual winding, and dual winding is arranged on bridge road opposite side as shown in Figure 2, and object is to improve sensitivity.The remolding sensitivity simplex winding bridge road that this bridge road is arranged improves 1 times.
Fig. 4 is measurement mechanism principle of compositionality figure of the present invention; Described device comprises as lower component and structure: level sensor and the displacement transducer be fixed on level sensor; Servomotor, controls the movement of described level sensor and displacement transducer; Signal conversion collecting unit, collects described level sensor, the signal of displacement transducer transmission of signal to controller; Controller, according to the signal that described signal conversion collecting unit transmits, controls servomotor; Detector power supply, powers to described level sensor.
Fig. 5 is servo liquid level of liquid metal measurement mechanism structural representation.Liquid level gauging, System self-test, the calculating of liquid level reference value and setting, detector can be realized depart from/the function such as extreme position judgement.
Mutual inductance type servo liquid level of liquid metal measurement mechanism is made up of following parts:
1, level sensor:
Comprise iron core 2, winding 3, cable duct tube 1, stainless steel sleeve pipe 4.
2, servo-drive system:
Servomotor, scrambler (not shown), lifting rope reel 7, lifting rope 8, wire rope wheel hub 9.
3, control system:
Comprise level sensor power supply, signal conversion collecting unit, displacement transducer and controller.
The present invention is using sensor output voltage maximal value as setting value, displacement transducer central horizontal is in liquid level, when liquid level rises, sensors measure voltage E sends the controller of servomotor to, controller judges the variation tendency of voltage, now change in voltage is in the negative edge of Fig. 3, and controller sends instruction and drives rotating backward of servomotor, drives displacement transducer to rise until stop when measurement output valve reaches setting value.Vice versa, thus realize following of detector liquid towards metal bath surface; By the scrambler of servo-drive system or the variable quantity of position indicator acquisition liquid metal liquid level, realize the measurement of liquid level of liquid metal.
Mutual inductance type servo liquid level of liquid metal measurement mechanism of the present invention and method can realize following liquid metal level change and measuring liquid level data in real time, meet requirement of engineering.This measuring system level gauging is accurate, does not need to carry out temperature compensation, Measurement sensibility, maintenance are little, long service life, does not have range ability limit, and also can be used in liquid level of liquid metal caliberating device, provide reference liquid level position data continuously.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if belong within the scope of the claims in the present invention and equivalent technology thereof to these amendments of the present invention and modification, then the present invention is also intended to comprise these change and modification.
Claims (6)
1. a mutual inductance type servo liquid level of liquid metal measurement mechanism, is characterized in that:
Described device comprises as lower component and structure:
Level sensor and the displacement transducer be fixed on level sensor;
Servomotor, controls the movement of described level sensor and displacement transducer;
Signal conversion collecting unit, collects described level sensor, the signal of displacement transducer transmission of signal to controller;
Controller, according to the signal that described signal conversion collecting unit transmits, controls servomotor;
Detector power supply, powers to described level sensor.
2. mutual inductance type servo liquid level of liquid metal measurement mechanism as claimed in claim 1, is characterized in that:
Described level sensor comprises cable duct tube, is arranged on the iron core of cable duct tube one end, around the winding of described iron core and the stainless steel sleeve pipe that is enclosed within outside the sensitive element of above-mentioned three parts composition.
3. mutual inductance type servo liquid level of liquid metal measurement mechanism as claimed in claim 1, is characterized in that:
Described level sensor comprises scrambler or position indicator further to obtain level change amount, realizes level gauging.
4. mutual inductance type servo liquid level of liquid metal measurement mechanism as claimed in claim 1, is characterized in that:
Described servomotor controls the movement of level sensor by the lifting rope reel of series connection, lifting rope, wire rope wheel hub.
5. mutual inductance type servo liquid level of liquid metal measurement mechanism as claimed in claim 1, is characterized in that:
A described both ends of power balanced potentiometer in parallel.
6. use a mutual inductance type servo liquid level of liquid metal measuring method for device according to any one of claim 1-5, it is characterized in that described method comprises the steps:
Using displacement sensor output voltage maximal value as setting value, the central horizontal of displacement transducer is in liquid level, when liquid level rises, displacement sensor output voltage sends the controller of servomotor to by signal conversion collecting unit, controller judges the variation tendency of voltage, controller sends instruction and drives rotating backward of servomotor, drives displacement transducer to rise until stop when described measurement output voltage reaches setting value; Vice versa, thus realize level sensor following liquid level; By the scrambler of level sensor or the variable quantity of position indicator acquisition liquid level, realize the measurement of liquid level of liquid metal.
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| CN201510883299.4A CN105352562A (en) | 2015-12-04 | 2015-12-04 | Induction type servo liquid metal liquid level measurement device and method |
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| CN201510883299.4A CN105352562A (en) | 2015-12-04 | 2015-12-04 | Induction type servo liquid metal liquid level measurement device and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106679764A (en) * | 2017-02-10 | 2017-05-17 | 衡阳镭目科技有限责任公司 | Conductive liquid level detecting device |
| WO2024027542A1 (en) * | 2022-08-01 | 2024-02-08 | 中广核研究院有限公司 | Mutual-induction type liquid metal leakage monitoring apparatus and use thereof |
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| JPS5262463A (en) * | 1975-11-18 | 1977-05-23 | Toshiba Corp | On-line calibrating device for continuous induction type liquid level gauge |
| JPS55117924A (en) * | 1979-03-06 | 1980-09-10 | Toshiba Corp | Induction system level gauge |
| JPS5868622A (en) * | 1981-10-21 | 1983-04-23 | Toshiba Corp | Induction type liquid level meter |
| CN102445254A (en) * | 2011-12-19 | 2012-05-09 | 北京京仪海福尔自动化仪表有限公司 | Device for measuring liquid level in tracking mode |
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| CN103727994A (en) * | 2013-12-24 | 2014-04-16 | 深圳市亚美联合压铸设备有限公司 | Electromagnetic induction molten magnesium level meter |
| CN205209580U (en) * | 2015-12-04 | 2016-05-04 | 中国原子能科学研究院 | Servo liquid metal liquid level measurement device of exchangeable formula |
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2015
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Patent Citations (7)
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| JPS5262463A (en) * | 1975-11-18 | 1977-05-23 | Toshiba Corp | On-line calibrating device for continuous induction type liquid level gauge |
| JPS55117924A (en) * | 1979-03-06 | 1980-09-10 | Toshiba Corp | Induction system level gauge |
| JPS5868622A (en) * | 1981-10-21 | 1983-04-23 | Toshiba Corp | Induction type liquid level meter |
| CN102859336A (en) * | 2010-04-30 | 2013-01-02 | 阿格利斯集团股份公司 | Measurements in metallurgical vessels |
| CN102445254A (en) * | 2011-12-19 | 2012-05-09 | 北京京仪海福尔自动化仪表有限公司 | Device for measuring liquid level in tracking mode |
| CN103727994A (en) * | 2013-12-24 | 2014-04-16 | 深圳市亚美联合压铸设备有限公司 | Electromagnetic induction molten magnesium level meter |
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Non-Patent Citations (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106679764A (en) * | 2017-02-10 | 2017-05-17 | 衡阳镭目科技有限责任公司 | Conductive liquid level detecting device |
| WO2024027542A1 (en) * | 2022-08-01 | 2024-02-08 | 中广核研究院有限公司 | Mutual-induction type liquid metal leakage monitoring apparatus and use thereof |
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