CN103344306A - Device and method of WSN float liquid level detection for environmental protection - Google Patents
Device and method of WSN float liquid level detection for environmental protection Download PDFInfo
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- CN103344306A CN103344306A CN2013102680626A CN201310268062A CN103344306A CN 103344306 A CN103344306 A CN 103344306A CN 2013102680626 A CN2013102680626 A CN 2013102680626A CN 201310268062 A CN201310268062 A CN 201310268062A CN 103344306 A CN103344306 A CN 103344306A
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Abstract
The invention discloses a device and method of WSN float liquid level detection for environmental protection. Two downwards perpendicular sliding rails are laid on a sliding rail support. The center of gravity portion of a baffle support is fixedly connected with the lower end of a steel wire rope and the upper end of the steel wire rope is connected with a wire winding guiding wheel upwards in a perpendicular mode. The lower end of each right-angle contact support is provided with one liquid level contact. The two liquid level contacts are arranged face to face in a vertically perpendicular mode. The lifting of a liquid level drives a spring to generate elastic deformation, the position of a liquid level pointer is changed, so that a control system device is driven to generate different control operations, the wire winding guiding wheel is driven to rotate so as to reel the transmission steel wire rope in or reel the transmission steel wire rope out until the deformed spring recovers to a natural state, and finally the liquid level pointer is separated from an induction contact. The fluctuation condition of the liquid level is judged and monitored through the elastic deformation of the spring, the displacement of change of the liquid level is calibrated through control of pulse count of a stepping motor, adjustment is simple, transmission is accurate, and the device of WSN float liquid level detection for environmental protection has the advantages of microminiaturization, intelligence-orientation and continuous work.
Description
Technical field
The present invention relates to level gauging field and environmental protection field, particularly relate to a kind of environmental protection WSN(wireless sensing) float liquid level pick-up unit and method, be widely used in the level measuring of the various media of numerous areas such as chemical industry, medicine, Running-water Company, hydrometric station.
Background technology
Liquid level detection device generally all is to be applied in abominable, the with serious pollution occasion of environment, especially water level monitoring station, the warning that the accuracy of water level detecting value is given flood season or decision-making provide valuable reference value, the central control room far away apart from the monitoring point particularly, the teletransmission effect requirements height of signal, failure rate are low.Existing liquid level detection device is generally fixed the wheel of two different-diameters at rope sheave, be used for twining the wire rope on float and the weight in the other direction, the equilibrant effect makes that float keeps floating on the surface, the lifting of water level changes the variation that drives float, the wire rope of float twines or discharges under the effect of weight, drive rope sheave transmission shaft and change speed gear box rotates thereupon, SEA LEVEL VARIATION is outputed to the angle displacement scrambler with the angle variation, be transformed into electric signal and be sent on the signal processing circuit board, handle to obtain the SEA LEVEL VARIATION data by microprocessor and arithmetical unit again.But the data of this liquid level detection device can only show in this locality, can't pass to control terminal; As long as the water surface has fluctuation at the effect end of gentle breeze, the angle displacement scrambler of device will move, and antijamming capability is relatively poor.
China Patent No. is the float type level gauge that 200910219683.9 patent documentation relates to a kind of continuous remote transmission, the guide rail that comprises float, magnetic unitor, conduction or magnetic conduction conduction, magnetic axis or metal shaft are under magneticaction, along with moving up and down of float, move up and down along guide rail, obtain corresponding level value by the resistance value in the galvanic circle of measuring guide rail, magnetic axis or metal shaft formation, detect data by the wireless module teletransmission.But the resistance value of this float type level gauge is subjected to temperature variation bigger, influences precision; Magnetic axis or metal shaft and guide rod are sliding friction, and friction force is big; May produce electric spark during slip, explosion-proof occasion can not be used.
Summary of the invention
The objective of the invention is to propose a kind of structure is ingenious, antijamming capability is strong, measuring accuracy is high environmental protection WSN float liquid level pick-up unit and method for overcoming the various shortcomings and deficiency that prior art exists, utilize WSN to realize Monitoring Data and continuous remote transmission.
Environmental protection of the present invention with the technical scheme that WSN float liquid level pick-up unit adopts is; Support base plate and vertical sliding rail rack with level, fixedly connected support base plate bottom surface, sliding rail rack upper end, fixed placement has stepper motor, control system device and WSN remote communication module on the bracket bottom plate top surface, stepper motor connects coiling guide wheel and control system device, the control system device is electrically connected the WSN remote communication module by control signal wire, and the WSN remote communication module connects communication antenna; Sliding rail rack is equipped with two sliding rails vertically downward, respectively establish a slide rail wheel on each sliding rail, the wheel shaft that connects level between two slide rail wheels, the fixedly connected barrier support of wheel shaft inboard, the fixedly connected wire rope lower end, centre of gravity place place of barrier support, the wire rope upper end connects the coiling guide wheel vertically upward; Two right angle contacts supports vertically pass hole c, the d on the barrier support from top to bottom respectively and are fixedly connected on barrier support, and a liquid level contact is respectively established in each right angle contacts support lower end, and two liquid level contact e, f vertically arrange up and down Face to face; Two springs are cascaded, first fixedly connected barrier support in spring upper end, first spring lower end connects second spring upper end, second spring lower end connects the liquid level float, the liquid level pointer of the series connection place connection level of two springs, the indication end of liquid level pointer is between two liquid level contact e, f, and two liquid level contact e, f are by signal lines connection control system device.
Environmental protection of the present invention is following steps with the technical scheme of the detection method employing of WSN float liquid level pick-up unit:
A, when liquid level descends, elongation deformation takes place in spring, the traction fluid bit pointer moves down, and the liquid level pointer contacts with contact f, and the control system device produces interrupt request singal by the liquid level signal lines, the counter-rotating of control system device control step motor, put down shackle line, barrier support moves down, up to the liquid level pointer with fall liquid level contact f and break away from, the liquid level signal lines can produce an interrupt request singal again, and spring recovers the nature extended state; The number of drive pulses equivalence of stepper motor goes out the amount of moving down of liquid level, calculates current level value, by the teletransmission of WSN remote communication module;
B, when liquid level rises, spring generation compression set, the traction fluid bit pointer moves up, and the liquid level pointer contacts with contact e, and the control system device produces interrupt request singal by the liquid level signal lines, control system device control step motor just changes, upwards tighten up shackle line, barrier support moves up, up to the liquid level pointer with rises liquid level contact e disengaging, the liquid level signal lines produces an interrupt request singal again, and spring is in the nature extended state; The number of drive pulses equivalence of stepper motor go out liquid level on the amount of moving, calculate current level value, by the teletransmission of WSN remote communication module.
The present invention compares with technology with existing method, has following advantage:
1, the present invention utilizes the elastic deformation of spring to judge the fluctuation situation of monitoring liquid level, and apparatus structure is flexible for installation, and transmission is accurate, has microminiaturization, intellectuality and non-stop run characteristics.
2, the present invention utilizes the step-by-step counting of stepper motor to demarcate the displacement that liquid level changes, and can avoid the disturbing factor at environmental monitoring scene to the influence of accuracy of detection.
3, the present invention can realize that the wireless remote of Monitoring Data transmits, for Surveillance center's remote measuring and controlling provides advantage.
4, the guide wheel of the traction of the stepper motor among the present invention can be convenient for changing according to working environment, is applicable to different workplaces.
Description of drawings
Fig. 1 is the three-dimensional structure diagram that WSN float liquid level pick-up unit is used in environmental protection of the present invention;
Fig. 2 is the front view of Fig. 1;
Fig. 3 is the left view of Fig. 2;
Fig. 4 is the installation vertical view of the amplification of barrier support 15 among Fig. 2;
Fig. 5 is the composition frame chart of control system device 4 among Fig. 1;
The sequence number of each parts and title in the accompanying drawing: 1. stepper motor bearing; 2. stepper motor; 3. control signal wire; 4. control system device; 5. communication antenna; 6.WSN remote communication module; 7. support base plate; 8. triangular support bracket; 9. sliding rail rack; 10. right angle contacts support; 11. liquid level pointer; 12. sliding rail; 13. liquid level float; 14. spring; 15. barrier support; 16. signal lines; 17. shackle line; 18. coiling guide wheel; 19. slide rail wheel; 20. wheel shaft.
Embodiment
Referring to Fig. 1 ~ 4, support section of the present invention is made up of with vertical sliding rail rack 9 the support base plate 7 of level, sliding rail rack 9 is positioned at support base plate 7 belows, the upper end of sliding rail rack 9 is fixedly connected on the bottom surface of support base plate 7, fixedly connected with triangular support bracket 8 between the upper end of sliding rail rack 9 and support base plate 7, to strengthen the stability of support section.Fixed placement stepper motor 2, control system device 4 and WSN remote communication module 6 on the end face of support base plate 7, stepper motor 2 is by stepper motor bearing 1 mechanical connection coiling guide wheel 18, stepper motor 2 also is electrically connected control system device 4 by control signal wire 3, control system device 4 is electrically connected WSN remote communication module 6 by control signal wire 3, connects communication antenna 5 on the WSN remote communication module 6.
On sliding rail rack 9, be equipped with two sliding rails 12 vertically downward from top to bottom, a slide rail wheel 19 respectively is installed on each sliding rail 12, the notch of sliding rail 12 is blocked slide rail wheel 19, make barrier support 15 can not depart from sliding rail rack 9.Two slide rail wheel 19 co-altitudes, between connect the wheel shaft 20 of level.Wheel shaft 20 fixedly connected barrier supports 15 inboards of level adjust to guarantee that barrier support 15 can freely not have frictionally to slide up and down on vertical sliding rail 12.The lower end of the fixedly connected wire rope 17 in middle centre of gravity place place of barrier support 15, the upper end of wire rope 17 are connected in the wire casing of coiling guide wheel 18 vertically upward.Make barrier support 15 be level, and and sliding rail rack 9, wire rope 17 all perpendicular.
Referring to Fig. 1,2,4,4 holes are arranged on the barrier support 15, be respectively hole a, b, c, d, 4 a, b, c, d ecto-entads are arranged, are positioned on the same straight line through center of gravity.Hole a is used for the upper end of fixing spring 14, and hole b is at middle the centre of gravity place of barrier support 15, and the lower end of fixedly connected wire rope 17 guarantees the spring 14 of the balance with joint efforts of barrier support 15 and barrier support 15 belows in the raw.Hole c, d are respectively applied to install 10, two right angle contacts supports 10 of two right angle contacts supports and pass hole c, d respectively.
There are two springs 14 to be cascaded, the upper end of first spring 14 is by the fixedly connected barrier support 15 of hole a, the lower end of first spring 14 connects the upper end of second spring 14, the lower end of second spring 14 connects liquid level float 13 by hook, and liquid level float 13 freely is suspended on the lower end of second spring 14 under the effect of gravity.Liquid level float 13 can be the baton round of high alloy steel ball or outer wall oiling conducting medium, perhaps spheroid or the cylinder made of other conductive materials.Junction at two springs 14 connects liquid level pointer 11, and the indication liquid level changes, and liquid level pointer 11 is level, and the indication end of liquid level pointer 11 is pointed to inboard.
The lower end of two right angle contacts supports 10 is fixedly liquid level contact e, f respectively, liquid level contact e, f up and down vertical plane to arranging that over the ground the indication end of liquid level pointer 11 is between two liquid level contact e, f.According to the actual conditions of testing environment, the contact separation of adjustment hole c and hole d is adjusted to appropriate location and fixing, and two contact e, f of right angle contacts support 10 and liquid level pointer 11 are in the same vertical plane.Two liquid level contact e, f are used for touching liquid level pointer 11, two liquid level contacts e, f and are connected to control system device 4 by signal lines 16, as the interruption control pin of system.
Referring to Fig. 5, comprise the MCU control system in the control system device 4, the MCU control system connects power supply power supply module, motor drive module, liquid level detection module, LCD MODULE, WSN wireless remote transmission driver module, liquid level warning module respectively.Power supply power supply module is carried out the power supply conversion, for each disparate modules in the control system device 4 provides needed power supply, guarantees that whole system can operate as normal.WSN wireless remote transmission driver module connects WSN remote communication module 6, and motor drive module connects stepper motor 2, according to the look-at-me that the MCU control system produces, adjusts the duty of stepper motor 2.When liquid level rose to a certain variable quantity, liquid level pointer 11 can contact with rising liquid contact e, and the MCU control system produces look-at-me, drive stepper motor 2 work, coiling guide wheel 18 rotary tightening shackle lines 17, up to rising to a certain position, liquid level pointer 11 with rise liquid contact e and separate.Perhaps when liquid level dropped to a certain variable quantity, liquid level pointer 11 can contact with falling liquid contact f, and the MCU control system produces look-at-me, drive stepper motor 2 work, shackle line 17 is loosened in 18 rotations of coiling guide wheel, and up to dropping to a certain position, liquid level pointer 11 separates with contact f.After fluid level condition was stable, the MCU control system stopped the work of stepper motor 2, and according to the working pulse number of stepper motor 2, calculated the liquid level displacement.The liquid level initial value of setting when installing draws the instantaneous value of liquid level, is presented on the local liquid crystal display, and can data be delivered to the remote monitoring station by WSN wireless remote transmission driver module.
Referring to Fig. 1 ~ 5, principle of work of the present invention is according to mechanics principle, and two springs 14 under the effect that external force is arranged elongation or compression set can take place, and shackle line 17 unexpected deformation can not take place under the effect of external force.The buoyancy that the gravity of liquid level float 13 equals to soak in liquid.The gravity of barrier support 15, spring 14, right angle contacts support 10, liquid level pointer 11 is born by shackle line 17.Generally speaking, hang the spring 14 of liquid level float 13 in the raw, liquid level pointer 11 is positioned at the centre position of two liquid level contact e, f.By the Floater Structure that spring 14 is formed, elastic deformations take place in move spring 14 of the take off and landing strip of liquid level, change the position of liquid level pointer 11, thereby driving control system device 4 produce different control operations.When the detection liquid level changes up and down, cause spring 14 that elongation or compression set take place within the specific limits, thereby move the position that drives the liquid level pointer 11 that is connected with spring 14.The liquid level signal lines initial configuration of control system is high level, and when the liquid level pointer contacted with f with liquid level contact e, the liquid level signal lines can be low level by the high level saltus step, produces a look-at-me in control system; And when the liquid level pointer separated with f with liquid level contact e, the liquid level signal lines can be high level by low transition again, produced a look-at-me in control system.Control system can be operated thereby carry out accordingly according to different look-at-mes.Liquid level pointer 11 is in the process with liquid fluctuating, can contact with induction level contact e, the f of indication level fluctuation direction, control system device 4 can produce look-at-me in this case, drive motor controller produces pulse signal, indication stepper motor 2 forward or reverse, traction coiling guide wheel 18 rotates and tightens up or loosen shackle line 17, up to making the spring 14 that deformation takes place return to state of nature, be that final liquid level pointer 11 separates with sense contact e, f, control system device 4 another look-at-mes of detection generation drive stepper motor 2 and quit work.Control system device 4 changes into the displacement that guide wheel rotates the shackle line 17 that produces according to the pulse data of the stepper motor 2 of program record, namely represents the variable quantity of liquid level.Level value during again according to system initialization calculates the real-time level value, shows that local liquid crystal display and teletransmission are to the monitoring station.About the basic parameter of control system device 4, in the time of can installing according to equipment by the host computer monitoring system, independently arrange.
When liquid level descends, elongation deformation can take place in spring 14, traction fluid bit pointer 11 moves down, when reaching a certain displacement, liquid level pointer 11 with fall liquid level contact f and contact, the liquid level signal lines 16 that causes the MCU control system produces interrupt request singal, the MCU control system is judged the direction that moves down of liquid level pointer 11,2 counter-rotatings of motor drive module control step motor, put down shackle line 17, the total of guide baffle plate support 15 moves down, up to liquid level pointer 11 with fall liquid level contact f and break away from, liquid level signal lines 16 can produce an interrupt request singal again, the MCU control system judges that liquid level float 13 has reached a certain liquid level, be in equilibrium state, spring 14 recovers the nature extended states at this moment.Behind the system stability, go out the amount of moving down of liquid level according to the number of drive pulses equivalence of stepper motor 2, and the calibration value of initialization when installing, calculate current level value.Show level value at local liquid crystal display in real time, and pass through the teletransmission of WSN wireless remote transmission driver module to the monitoring station.
When liquid level rises suddenly, according to mechanics principle, compression set can take place in spring 14, traction fluid bit pointer 11 moves up, when reaching a certain displacement, liquid level pointer 11 with rise liquid level contact e and contact, the liquid level signal lines 16 that causes the MCU control system produces interrupt request singal, the MCU control system judge liquid level pointer 11 on move direction, motor drive module control step motor 2 is just changeing, upwards tighten up shackle line 17, the total of guide baffle plate support 15 moves up, up to liquid level pointer 11 with rises liquid level contact e disengaging, produce an interrupt request singal again, MCU control system indication liquid level float 13 has reached a certain liquid level, and spring 14 is in the nature extended state.Behind the system stability, according to the number of drive pulses equivalence of stepper motor 2 go out liquid level on the amount of moving, and the calibration value of initialization when installing calculates current level value.Show level value at local liquid crystal display in real time, and pass through the teletransmission of WSN wireless remote transmission driver module to the monitoring station.
Considered that the unstable situation of lifting or the fluctuation of water level can appear in the water surface under the effect of gentle breeze, the present invention limits to be had only when liquid level ascending amount or slippage surpass a limit value, namely with rise liquid level contact e or fall and just can carry out corresponding action when liquid level contact f contacts, reduce the fluctuating error of water wave, guarantee the stability of system.
Claims (4)
1. an environmental protection is with WSN float liquid level pick-up unit, it is characterized in that: have the support base plate (7) of level and vertical sliding rail rack (9), fixedly connected support base plate (7) bottom surface, sliding rail rack (9) upper end, fixed placement has stepper motor (2) on support base plate (7) end face, control system device (4) and WSN remote communication module (6), stepper motor (2) connects coiling guide wheel (18) and control system device (4), control system device (4) is electrically connected WSN remote communication module (6) by control signal wire (3), and WSN remote communication module (6) connects communication antenna (5); Sliding rail rack (9) is equipped with two sliding rails (12) vertically downward, respectively establish a slide rail wheel (19) on each sliding rail (12), the wheel shaft (20) that connects level between two slide rail wheels (19), wheel shaft (200 fixedly connected barrier support (15) inboards, the fixedly connected wire rope in centre of gravity place place (17) lower end of barrier support (15), wire rope (17) upper end connects coiling guide wheel (18) vertically upward; Two right angle contacts supports (10) vertically pass hole c, the d on the barrier support (15) from top to bottom respectively and are fixedly connected on barrier support (15), a liquid level contact is respectively established in each right angle contacts support (10) lower end, and two liquid level contact e, f vertically arrange up and down Face to face; Two springs (14) are cascaded, first spring (14) upper end fixedly connected barrier support (15), first spring (14) lower end connects second spring (14) upper end, second spring (14) lower end connects liquid level float (13), the liquid level pointer (11) of the series connection place connection level of two springs (14), the indication end of liquid level pointer (11) is between two liquid level contact e, f, and two liquid level contact e, f are all by signal lines (16) connection control system device (4).
2. according to the described a kind of environmental protection of claim 1 WSN float liquid level pick-up unit, it is characterized in that: have ecto-entad to arrange on the barrier support (15) and be positioned at hole a, b, c, d on the same straight line of center of gravity, hole a fixing spring (14) upper end, hole b is in the fixedly connected wire rope of centre of gravity place (17) lower end of barrier support (15).
3. according to the described a kind of environmental protection of claim 1 WSN float liquid level pick-up unit, it is characterized in that: described control system device (4) comprises the MCU control system, the MCU control system connects power supply power supply module, motor drive module, liquid level detection module, LCD MODULE, WSN wireless remote transmission driver module and liquid level warning module respectively, motor drive module connects stepper motor 2, and WSN wireless remote transmission driver module connects WSN remote communication module (6).
One kind environmental protection is with the detection method of WSN float liquid level pick-up unit according to claim 1, its feature has following steps:
A, when liquid level descends, elongation deformation traction fluid bit pointer (11) takes place and moves down in spring (14), liquid level pointer (11) contacts with contact f, control system device (4) produces interrupt request singal by liquid level signal lines (16), control system device (4) control step motor (2) counter-rotating, put down shackle line (17), barrier support (15) moves down, up to liquid level pointer (11) with fall liquid level contact f and break away from, liquid level signal lines (16) produces an interrupt request singal again, and spring (14) recovers the nature extended state; The number of drive pulses equivalence of stepper motor (2) goes out the amount of moving down of liquid level, calculates current level value, by WSN remote communication module (6) teletransmission;
B, when liquid level rises, compression set takes place in spring (14), traction fluid bit pointer (11) moves up, liquid level pointer (11) contacts with contact e, control system device (4) produces interrupt request singal by liquid level signal lines (16), control system device (4) control step motor (2) just changes, upwards tighten up shackle line (17), barrier support (15) moves up, up to liquid level pointer (11) with rises liquid level contact e disengaging, liquid level signal lines (16) produces an interrupt request singal again, and spring (14) is in the nature extended state; The number of drive pulses equivalence of stepper motor (2) go out liquid level on the amount of moving, calculate current level value, by WSN remote communication module (6) teletransmission.
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| CN201310268062.6A CN103344306B (en) | 2013-07-01 | 2013-07-01 | A kind of environmental protection WSN float liquid level pick-up unit and method |
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| CN201310268062.6A CN103344306B (en) | 2013-07-01 | 2013-07-01 | A kind of environmental protection WSN float liquid level pick-up unit and method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106482802A (en) * | 2016-12-26 | 2017-03-08 | 北京美科华仪科技有限公司 | Liquid evaporation amount detecting device |
| CN107907186A (en) * | 2017-11-20 | 2018-04-13 | 南通海狮船舶机械有限公司 | Elastic force type liquid level gauge |
| CN108562461A (en) * | 2018-06-07 | 2018-09-21 | 中国农业科学院农业资源与农业区划研究所 | Agricultural land soil leaching liquor automated watch-keeping facility and method |
| CN113104692A (en) * | 2021-03-26 | 2021-07-13 | 广东亚太西奥电梯有限公司 | Waterproof safe elevator that soaks |
| CN114508493A (en) * | 2022-02-17 | 2022-05-17 | 湖南程微电力科技有限公司 | Intelligent drainage device adjusted along with liquid level |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB855475A (en) * | 1957-12-26 | 1960-11-30 | Shand And Jurs Co | Improved liquid level gauging apparatus |
| US5243860A (en) * | 1992-01-22 | 1993-09-14 | Whessoe Plc | Liquid level measurement |
| CN101241022A (en) * | 2007-02-06 | 2008-08-13 | 吴尚恩 | Photoelectric dobber tracking type liquid level monitoring device |
| CN201731920U (en) * | 2010-06-10 | 2011-02-02 | 黄建国 | Wireless water regimen detecting and reporting system |
| CN202676243U (en) * | 2012-04-17 | 2013-01-16 | 中国联合水泥集团有限公司南阳分公司 | Double-floating-ball type water level measuring device |
-
2013
- 2013-07-01 CN CN201310268062.6A patent/CN103344306B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB855475A (en) * | 1957-12-26 | 1960-11-30 | Shand And Jurs Co | Improved liquid level gauging apparatus |
| US5243860A (en) * | 1992-01-22 | 1993-09-14 | Whessoe Plc | Liquid level measurement |
| CN101241022A (en) * | 2007-02-06 | 2008-08-13 | 吴尚恩 | Photoelectric dobber tracking type liquid level monitoring device |
| CN201731920U (en) * | 2010-06-10 | 2011-02-02 | 黄建国 | Wireless water regimen detecting and reporting system |
| CN202676243U (en) * | 2012-04-17 | 2013-01-16 | 中国联合水泥集团有限公司南阳分公司 | Double-floating-ball type water level measuring device |
Non-Patent Citations (1)
| Title |
|---|
| 鲁远浩: "高精度数字液位测量系统设计研究", 《中国学位论文全文数据库》, 27 April 2013 (2013-04-27) * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106482802A (en) * | 2016-12-26 | 2017-03-08 | 北京美科华仪科技有限公司 | Liquid evaporation amount detecting device |
| CN106482802B (en) * | 2016-12-26 | 2023-06-09 | 北京美科华仪科技有限公司 | Liquid evaporation amount detection device |
| CN107907186A (en) * | 2017-11-20 | 2018-04-13 | 南通海狮船舶机械有限公司 | Elastic force type liquid level gauge |
| CN108562461A (en) * | 2018-06-07 | 2018-09-21 | 中国农业科学院农业资源与农业区划研究所 | Agricultural land soil leaching liquor automated watch-keeping facility and method |
| CN108562461B (en) * | 2018-06-07 | 2023-07-11 | 中国农业科学院农业资源与农业区划研究所 | Automatic monitoring device and method for farmland soil leaching solution |
| CN113104692A (en) * | 2021-03-26 | 2021-07-13 | 广东亚太西奥电梯有限公司 | Waterproof safe elevator that soaks |
| CN114508493A (en) * | 2022-02-17 | 2022-05-17 | 湖南程微电力科技有限公司 | Intelligent drainage device adjusted along with liquid level |
| CN114508493B (en) * | 2022-02-17 | 2024-03-12 | 湖南程微电力科技有限公司 | Intelligent drainage device with liquid level adjustment |
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| CN103344306B (en) | 2015-09-02 |
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