CN100410635C - Level meter - Google Patents
Level meter Download PDFInfo
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- CN100410635C CN100410635C CNB2004100154167A CN200410015416A CN100410635C CN 100410635 C CN100410635 C CN 100410635C CN B2004100154167 A CNB2004100154167 A CN B2004100154167A CN 200410015416 A CN200410015416 A CN 200410015416A CN 100410635 C CN100410635 C CN 100410635C
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- liquid level
- optoelectronic switch
- receiving device
- vernier
- emitting diode
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- Level Indicators Using A Float (AREA)
Abstract
The present invention discloses a liquid level meter for a high pressure boiler. The liquid level meter comprises a communicating device communicating a measured container, and a magnetic float lifting following the liquid level is arranged in the communicating device. The outside of the communicating device is provided with a cursor magnetically coupled with the magnetic float, and a plurality of photoelectric switches are installed along the liquid level height of the measured container. When the cursor is in different height, the cursor is corresponding to different photoelectric switches so that the photoelectric switches are hidden or reflected. Each photoelectric switch is respectively connected with a control unit, and the voltage different to the voltage of other photoelectric switches is outputted according to the voltage of one photoelectric switch so that the liquid level height of the measured container is obtained. The liquid level meter of the present invention can provide the liquid level electric signal output, and moreover, the liquid level meter of the present invention has the advantages of simple structure, durable and reliable performance, rapid response, high accuracy and convenient refitting.
Description
Technical field:
The present invention relates to liquid level gauge, especially indicate the liquid level gauge of liquid level by buoy.
Background technology:
What China boiler for producing enterprise adopted in decades is that two blocks of glass fit the boiler water gauge of using bolted again, and operation is difficult for distinguishing that water level gauge is also easily by water pollution, influence observation effect, and weeping often appears, and need often maintenance, particularly be not suitable for high-pressure boiler.The patent No. is that 97213186.8 Chinese utility model patent discloses a kind of magnetic tracking mode colour table liquid level gauge, be characterized in that the linker of tested container is fixed on the outside of tested container, magnetic float with liquid surface lifting is arranged in the linker, and there is the magnetic colour code with the magnetic float coupling in the linker outside.The position at magnetic float place is delivered on the magnetic colour code by magnetic couplings, can read liquid level from scale.But be to use this water level gauge need estimate Real Time Observation, no electric signal can not automatically obtain the concrete water level of tested container; In addition, be sliding friction between magnetic colour code and the cylindrical shell, show to lag behind.
Traditional electric contact point fluviograph is the widely used high-pressure boiler water level gauge that can export electric signal, and its principle is to utilize the difference of the resistivity of vapour, aqueous medium in the boiler to measure water level.Its shortcoming is that resolution is limited by electrode size, can not be very high; Change boiler body, comparatively trouble is installed; Use alternating current, the change-over circuit complexity.The little medium small boiler that is fit to.
Summary of the invention:
The present invention solves the problem that existing magnet tracing type tank gage can not be exported the liquid level electric signal, and a kind of resolution height, easy for installation, liquid level gauge that the output of liquid level electric signal can be provided are provided.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: a kind of liquid level gauge, comprise the linker that is connected with tested container, magnetic float with liquid surface lifting is arranged in the linker, the linker outside is fixed with vertical guide rail, is limited on the guide rail with the magnetic coaster of magnetic float magnetic couplings and can rolls along guide rail; Along laying a plurality of optoelectronic switches on the tested container liquid level, be fixed on the supratrochlear vernier of magnetic when being in differing heights corresponding to different optoelectronic switches; Control module is connected with each optoelectronic switch, exports the voltage output that is different from other optoelectronic switch according to the voltage of certain optoelectronic switch and knows liquid level in the tested container.
Described optoelectronic switch can be the transmission-type optoelectronic switch, between light emitting diode wherein arranged in pairs and the photoelectric receiving device slit is arranged, and the supratrochlear vernier of magnetic is with passing through from the slit of each optoelectronic switch in the liquid surface lifting process; Can not receive the light time of being sent by corresponding light emitting diode when the photoelectric receiving device of certain optoelectronic switch is blocked by vernier, control module is known liquid level according to the position of this optoelectronic switch and electric signal output is provided.
Described optoelectronic switch also can be a reflective photoelectric switch, and vernier passes through with the side from each optoelectronic switch in the liquid surface lifting process; When the photoelectric receiving device of certain optoelectronic switch receives the light time that the corresponding light emitting diode that reflected back by vernier sends, control module is known liquid level according to the position of this optoelectronic switch and electric signal output is provided.
Described control module comprises light-emitting diode with scanning driver module and the received signal processing module by CPU control; In CPU for the given appropriate address of each optoelectronic switch; Light-emitting diode with scanning driver module driven for emitting lights diode is luminous one by one, and corresponding optoelectronic switch is in running order; CPU knows according to the signal of sending here whether the photoelectric receiving device in certain duty receives the light that is sent by corresponding light emitting diode after the received signal processing module is handled, thus liquid level as can be known.
Described control module also can comprise photoelectric receiving device turntable driving module and the received signal processing module by CPU control; In CPU for the given appropriate address of each optoelectronic switch; Each light emitting diode all is in luminance, and photoelectric receiving device receives corresponding light and handles by the received signal processing module; Under photoelectric receiving device turntable driving module drive, the signal of handling through the received signal processing module sends signal to CPU one by one; CPU knows according to handle the signal send here through the received signal processing module whether certain photoelectric receiving device receives the light that is sent by corresponding light emitting diode, thus liquid level as can be known.
Described each optoelectronic switch equidistantly distributes, and the width of vernier is greater than the spacing of adjacent two optoelectronic switches, to guarantee whenever all have at least an optoelectronic switch to be blocked by vernier or reflect.
In order to have the liquid level warning function, also can be provided with warning circuit in the described control module, the optoelectronic switch at tested container limit liquid level place is blocked or reflex time by vernier, and warning circuit is connected and is reported to the police.
Liquid level gauge of the present invention, simple in structure, lasting reliable; The guide rail pulley mechanism can make vernier change rapidly with the magnetic float lifting, and response is timely, and no hysteresis problem reflects height of water level real-time; Leve signal output can be provided, be convenient to automatic control; The quantity that can increase optoelectronic switch as required improves the reading degree of accuracy; Repacking is convenient, and the repacking cost is low.
Description of drawings:
Below in conjunction with accompanying drawing the present invention is further described in detail.
Fig. 1 is that liquid level gauge of the present invention is installed in the structural representation on the tested container.
Fig. 2 is the structural representation of the liquid level gauge of embodiment 1.
Fig. 3 is the structural representation of the liquid level gauge of embodiment 2.
Fig. 4 is the optical detection principle and the control module figure of the liquid level gauge of embodiment 1.
Fig. 5 is the light-emitting diode with scanning driver module circuit diagram in the control module of embodiment 1.
Fig. 6 is the photoelectric receiving device signal processing module figure in the control module of embodiment 1.
Fig. 7 is the photoelectric receiving device signal processing module figure in the control module of embodiment 3.
Embodiment:
Embodiment 1:
As Fig. 1, Fig. 2, shown in Figure 4, linker 9 is fixed on tested container 1 outside by the connection water pipe 2 of band valve.Magnetic float 3 with liquid surface lifting is arranged in the linker 9.Linker 9 outer walls are fixed with two vertical guide rails 11, and the roller of the both sides of magnetic coaster 4 is contained on two guide rails 11 respectively and can rolls along guide rail, because moving resistance is very little, magnetic float 3 can drive magnetic coaster 4 by magnetic couplings and move flexibly along guide rail.Be fixed with an outwardly directed vernier 5 on the magnetic coaster 4.The optoelectronic switch 8 of one group of transmission-type is vertically fixed on outside the linker 9, and each optoelectronic switch equidistantly distributes; Each optoelectronic switch all comprises light emitting diode 13 arranged in pairs and photoelectric receiving device 14, leaves slit 12 together between light emitting diode 13 and the photoelectric receiving device 14, passes through from slit 12 when vernier 5 moves.The vertical range that vernier 5 width in vertical direction is a bit larger tham adjacent two optoelectronic switches, make at any one time, some at least optoelectronic switches 8 in the optoelectronic switch group are blocked by vernier 5, and its voltage output pulse is different from other voltage output pulses that is not subjected to the optoelectronic switch that vernier blocks.In view of the above signal is input to the concrete water level that control module 6 just can obtain tested container 1.Optoelectronic switch group, vernier, magnetic coaster and guide rail can together be sealed in the cover box 10, to prevent the influence (optoelectronic switch group and vernier are not sealed in the cover box 10 in Fig. 2,3 illustrated embodiments) to device measuring precision and serviceable life such as water steam, dust.
As Fig. 4, Fig. 5, shown in Figure 6, control module comprises CPU and by the light-emitting diode with scanning driver module 62 of CPU control and received signal processing module 63 etc., in CPU for the given corresponding address of each optoelectronic switch.Use address decoder 61 in light-emitting diode with scanning driver module 62 circuit, when the no signal of address, output is high level, and light emitting diode 13 two ends level are height, and are little by electric current, so not luminous; When there was signal the address, light emitting diode 13 conductings were luminous.When the address was received the signal that turntable driving module 63 sends successively, light emitting diode 13 was shinny one by one from top to bottom, realized that scanning detects fast.With a loop program, the address for all is set to high level to them successively, makes that corresponding optoelectronic switch is in running order, and other optoelectronic switch then is in off position.When the photoelectric receiving device 14 of a certain optoelectronic switch receives the light time that corresponding light emitting diode 13 sends, carry out preposition amplification, relatively arrangement by received signal processing module 63; Whether the level of judging this optoelectronic switch output is low level.If be not low level, show that then this photoelectric receiving device 14 is not blocked by vernier 5; Corresponding cyclic address change, continue circulation; When being low level, show that then the photoelectric receiving device 14 of this optoelectronic switch is blocked by vernier 5, the water level of tested container 1 optoelectronic switch therewith is corresponding.So just can jump out circulation.Just can obtain tested container 1 water level information according to the address numerical value of this moment and the difference of initial address, and can be delivered to this electric signal as the realization robotization control of loops such as demonstration, control by CPU.
Also can contain alarm circuit in the control module 6, when the optoelectronic switch at tested container limit liquid level place was blocked by vernier 5, this signal was delivered to warning circuit by CPU, sends alerting signal.
Embodiment 2:
As shown in Figure 2, during this implemented, optoelectronic switch was a reflective photoelectric switch, and all the other are with embodiment 1.When optoelectronic switch was not influenced by vernier 5, photoelectric receiving device 14 did not receive light signal; When vernier 5 arrived the front side of the pairing optoelectronic switch of a certain height with level change, the light that is sent by the light emitting diode in this optoelectronic switch 13 was received by photoelectric receiving device 14 by vernier 5 reflection backs, thus liquid level in the container at that time as can be known.
Embodiment 3:
Photoelectric receiving device signal processing module figure in the control module among this embodiment does not establish the light-emitting diode with scanning driver module as shown in Figure 7, and all the other are with embodiment 1.Control module 6 comprises CPU and by the photoelectric receiving device turntable driving module 64 of CPU control and received signal processing module 63 etc., in CPU for the given corresponding address of each optoelectronic switch.The light emitting diode 13 of optoelectronic switch group is all lighted by its driving circuit.Photoelectric apparatus 14 receives the light time, handles by received signal processing module 63.Under the driving of photoelectric receiving device turntable driving module 64, photoelectric apparatus sends signal to CPU for 14 groups from top to bottom one by one.When the no signal of address, output is high level; When there is signal the address, corresponding photoelectric apparatus 14 output signals.With a loop program, the address for all is set to high level to them successively, make that corresponding optoelectronic switch is in running order, and other optoelectronic switch is in off position.Whether the level of judging the optoelectronic switch output of corresponding work then is low level.If be not low level, show that then optoelectronic switch photoelectric receiving device 14 is not blocked by vernier 5, corresponding cyclic address change, continue circulation; If be low level, show that then the photoelectric receiving device 14 of this optoelectronic switch has been blocked by vernier 5, the water level of tested container optoelectronic switch therewith is corresponding.So just can jump out circulation.Just can obtain the tested container water level information according to the address numerical value of this moment and the difference of initial address.
Certainly, control module can also be other various ways.So long as liquid level in the tested container is known in the voltage output that output is different from other optoelectronic switch according to the voltage of certain optoelectronic switch, all should be within protection scope of the present invention.
Claims (7)
1. liquid level gauge, comprise the linker (9) that is connected with tested container (1), magnetic float (3) with liquid surface lifting is arranged in the linker (9), it is characterized in that: linker (9) outside is fixed with vertical guide rail (11), is limited in guide rail (11) with the magnetic coaster of magnetic float (3) magnetic couplings and goes up and can roll along guide rail (11); Along laying a plurality of optoelectronic switches (8) on tested container (1) liquid level, be fixed on the supratrochlear vernier of magnetic (5) when being in differing heights corresponding to different optoelectronic switches (8); Control module (6) is connected with each optoelectronic switch (8), exports the voltage output that is different from other optoelectronic switch according to the voltage of certain optoelectronic switch (8) and knows the interior liquid level of tested container (1).
2. liquid level gauge according to claim 1, it is characterized in that: described optoelectronic switch (8) is the transmission-type optoelectronic switch, between light emitting diode wherein arranged in pairs (13) and the photoelectric receiving device (14) slit (12) is arranged, the supratrochlear vernier of magnetic (5) is with passing through from the slit (12) of each optoelectronic switch in the liquid surface lifting process; Can not receive the light time of being sent by corresponding light emitting diode (13) when the photoelectric receiving device (14) of certain optoelectronic switch (8) is blocked by vernier (5), control module (6) is known liquid level according to the position of this optoelectronic switch (8) and electric signal output is provided.
3. liquid level gauge according to claim 1 is characterized in that: described optoelectronic switch (8) is a reflective photoelectric switch, and vernier (5) passes through with the side from each optoelectronic switch (8) in the liquid surface lifting process; When the photoelectric receiving device (14) of certain optoelectronic switch (8) receives the light time that the corresponding light emitting diode (13) that reflected back by vernier (5) sends, control module (6) is known liquid level according to the position of this optoelectronic switch (8) and electric signal output is provided.
4. according to claim 2 or 3 described liquid level gauges, it is characterized in that: described control module (6) comprises light-emitting diode with scanning driver module (62) and the received signal processing module (63) by CPU control; In CPU for the given appropriate address of each optoelectronic switch; Light-emitting diode with scanning driver module (62) driven for emitting lights diode (13) is luminous one by one, and corresponding optoelectronic switch is in running order; CPU knows according to the signal of sending here whether the photoelectric receiving device in certain duty receives the light that is sent by corresponding light emitting diode after received signal processing module (63) is handled, thus liquid level as can be known.
5. according to claim 2 or 3 described liquid level gauges, it is characterized in that: described control module (6) comprises photoelectric receiving device turntable driving module (64) and the received signal processing module (63) by CPU control; In CPU for the given appropriate address of each optoelectronic switch; Each light emitting diode (13) all is in luminance, and photoelectric receiving device (14) receives corresponding light and handles by received signal processing module (63); Under photoelectric receiving device turntable driving module (64) drove, the signal of handling through received signal processing module (63) sent signal to CPU one by one; CPU knows according to handle the signal send here through received signal processing module (63) whether certain photoelectric receiving device receives the light that is sent by corresponding light emitting diode, thus liquid level as can be known.
6. liquid level gauge according to claim 1 is characterized in that: described each optoelectronic switch (8) equidistantly distributes, and the width of vernier (5) is greater than the spacing of adjacent two optoelectronic switches.
7. liquid level gauge according to claim 1 is characterized in that: described control module has warning circuit in (6), and the optoelectronic switch when linker (9) limit liquid level place is blocked or reflex time by vernier (5), and warning circuit is connected and reported to the police.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100154167A CN100410635C (en) | 2004-02-20 | 2004-02-20 | Level meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100154167A CN100410635C (en) | 2004-02-20 | 2004-02-20 | Level meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1560574A CN1560574A (en) | 2005-01-05 |
| CN100410635C true CN100410635C (en) | 2008-08-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100154167A Expired - Fee Related CN100410635C (en) | 2004-02-20 | 2004-02-20 | Level meter |
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| CN (1) | CN100410635C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102193563B (en) * | 2010-03-01 | 2015-02-25 | 杨昌地 | Circulation system for controlling water level display and detecting scale accumulation separation based on multi-spot |
| CN102519549B (en) * | 2011-12-08 | 2013-07-31 | 无锡建仪仪器机械有限公司 | Digital-display specific surface area instrument liquid level acquisition device adaptive to ambient light changes |
| CN103142145A (en) * | 2013-04-02 | 2013-06-12 | 冯海涛 | Induction type drinking water heating device |
| CN105277258B (en) * | 2015-11-18 | 2018-10-23 | 大连嘉信机电仪表有限公司 | The floating ball type liquid-level meter that vernier is shown |
| CN105403284B (en) * | 2015-12-15 | 2018-11-20 | 江南大学 | A kind of photo-electric Level measurement device |
| CN112145975B (en) * | 2019-06-26 | 2022-05-24 | 中国石油化工股份有限公司 | Detection device and detection method for assisting judgment of accumulated liquid in gas pipeline |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61237019A (en) * | 1985-04-12 | 1986-10-22 | Mitsubishi Heavy Ind Ltd | Remote liquid level measuring system |
| CN2035872U (en) * | 1988-10-18 | 1989-04-12 | 何冠勇 | Photoelectric measuring device for liquid level |
| US5723870A (en) * | 1993-05-28 | 1998-03-03 | Simmonds Precision Products Inc. | Fluid gauging apparatus using magnetostrictive sensor and stick gauge |
| CN2278928Y (en) * | 1995-05-15 | 1998-04-15 | 陈文生 | High accuracy colour bar liquid level meter with infrared optoelectronic switches |
| CN2324535Y (en) * | 1997-12-30 | 1999-06-16 | 张维良 | Magnetron contact type photoelectric liquid level gauge |
-
2004
- 2004-02-20 CN CNB2004100154167A patent/CN100410635C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61237019A (en) * | 1985-04-12 | 1986-10-22 | Mitsubishi Heavy Ind Ltd | Remote liquid level measuring system |
| CN2035872U (en) * | 1988-10-18 | 1989-04-12 | 何冠勇 | Photoelectric measuring device for liquid level |
| US5723870A (en) * | 1993-05-28 | 1998-03-03 | Simmonds Precision Products Inc. | Fluid gauging apparatus using magnetostrictive sensor and stick gauge |
| CN2278928Y (en) * | 1995-05-15 | 1998-04-15 | 陈文生 | High accuracy colour bar liquid level meter with infrared optoelectronic switches |
| CN2324535Y (en) * | 1997-12-30 | 1999-06-16 | 张维良 | Magnetron contact type photoelectric liquid level gauge |
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| CN1560574A (en) | 2005-01-05 |
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| C06 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Tokheim Hengshan Technology (Guangzhou) Co., Ltd. Assignor: Jinan University Contract fulfillment period: 2008.10.6 to 2013.10.6 contract change Contract record no.: 2008440000279 Denomination of invention: Helical metal band liquid level gage and liquid level determination method thereof Granted publication date: 20080813 License type: Exclusive license Record date: 20081010 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.10.6 TO 2013.10.6; CHANGE OF CONTRACT Name of requester: TALKHEN TECHNOLOGY ( GUANGZHOU ) CO., LTD. Effective date: 20081010 |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080813 Termination date: 20110220 |