CN2890852Y - Photoelectric water level meter - Google Patents
Photoelectric water level meter Download PDFInfo
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- CN2890852Y CN2890852Y CN 200520099959 CN200520099959U CN2890852Y CN 2890852 Y CN2890852 Y CN 2890852Y CN 200520099959 CN200520099959 CN 200520099959 CN 200520099959 U CN200520099959 U CN 200520099959U CN 2890852 Y CN2890852 Y CN 2890852Y
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- water level
- photoelectricity
- water
- grating wheel
- transmission shaft
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Abstract
The utility model relates to a water level detecting method, which belongs to the equipments and meters technique field, which comprises a water level detecting mechanism, a photoelectricity transforming mechanism, and a control and display circuit, wherein the water level detecting mechanism directly contacts with the water level, and the gear driving mechanism connects with a photoelectricity transformation grating wheel, the control and display circuit connects with the output terminal of the photoelectricity probe of the photoelectricity transformation mechanism. A round grating wheel is adopted to connect with one photoelectricity switch, and the output terminal drives the grating wheel to rotate to generate double count pulse due to the changes of the water levels. A microprocessor computes the changing values and the values of the water levels according to the succession of the two pulses, and then displays and transmthe them through the display and the communication port to realize timely and precise detection and collection of the changes of the water levels, thereby having the advantages of greater span, better sensitiveness, longer service life, simpler conformation and better adaptability or the like comparing with the mechanical code disc and the photoelectricity code disc water level meters.
Description
Technical field: the utility model relates to a kind of photoelectricity water level gauge, be used for automatic water level measurement, demonstration, the transmission of the hydrology, automatic water regime measuring, be used in particular for the water level of the waters surface such as the sensing water level fluctuation is big, the fluctuation in stage amplitude is very big river, ground, lake, belong to the automatic water level measurement technical field.
Background technology: at present, the widely used water level monitoring method of China's hydrology industry is a self-recording nilometer, automaticity is low, the observation, the artificial link of collection that are used for waterlevel data are many, need artificial recording chart, data collection, the extracts water level process regularly changed, the input computer reorganization is time-consuming, efficient is low, and can increase the manual operation error.Along with the technology popularization of hydrology automatic telemetry, have the water level gauge research and development application in succession of automatic telemetry function, realized the electronic record of waterlevel data, can realize that regimen is observed and predicted and the robotization of data reorganization, improved the efficient of Data acquisition,, typing, reorganization.But the product that has come into operation at present also has some limitations, and as mechanical coding counting water level gauge, mechanical coding photoelectric reading water level gauge, range is subjected to the restriction of code length, as 10bit-0～10.23m, 12bit-0～40.95m, so can not realize gamut.In addition, mechanical coding photoelectric reading water level gauge needs to adopt regularly to add the mode of electric reading to reach purpose of power saving because the optoelectronic switch that adopts reaches more than 12, owing to have long reading (sampling) at interval, use in the occasion that wave is bigger, the random fluctuation of data is very big, and sensitivity is lower.The mechanical coding counting needs the periodic replacement mechanical switch because machinery is complicated, and the fluctuation that water level does not stop makes its wearing and tearing bigger.
Summary of the invention: in order to solve short, problem such as the photoelectric code disk range is limited of the mechanical switch life-span that existing water level gauge exists, the utility model provide a kind of life-span long, power consumption is supported, sensed water level changes photoelectricity water level gauge timely.
The technical solution of the utility model is: this photoelectricity water level gauge is made up of water-level detecting mechanism, photoelectricity transformation mechanism, control and display circuit, water-level detecting mechanism directly contacts with the water surface, its gear drive links to each other with photoelectricity transformation mechanism grating wheel, and control and display circuit link to each other with the photoelectric probe output terminal of photoelectricity transformation mechanism.Water-level detecting mechanism comprises float (3), suspension cable (5), rotating disk (6), transmission shaft (7), gear set (2), rotating disk and gear set are loaded on the transmission shaft, suspension cable is around on the rotating disk, the one end has been fastened float (3), the other end has been fastened balance bob (4), float floats on the surface, and moves up and down with fluctuation in stage, drives rotating disk (water level wheel) by suspension cable and rotates, rotating disk drives grating wheel by gear train (gear set and transmission shaft) and rotates, and the lifting of the water surface is converted to the circular motion of grating wheel; The photoelectricity transformation mechanism is formed by grating wheel (8), transmission shaft (7) and aligning grating wheel and by the photoelectric probe (1) that two infrared phototriodes of putting are side by side up and down formed, transmission shaft connects by gear set, grating wheel is fixed on the transmission shaft, is that the circular optical grating construction that has the even page or leaf sheet that distributes (can specifically determine the precision of level measuring according to need by the quantity of blade, as adopt the 8-16 sheet, precision is 0.1-0.5 centimetre), by the infrared ray of page or leaf sheet shading light electric probe, the circular motion of grating wheel is converted to light pulse signal; Control and display circuit are by the main circuit that comprises single-chip microcomputer, solid-state storage, RS-485, RS-232 interface, and LCD, keyboard are formed.
The utility model adopts a circular grating wheel to combine with an optoelectronic switch, output is rotated the double-counting pulse that produces because of SEA LEVEL VARIATION drives grating wheel, carry out calculating with SEA LEVEL VARIATION value and water level value by microprocessor according to the priority of two pulses, again by display, communication port show, record, detection promptly and accurately and supervision have been realized to SEA LEVEL VARIATION, avoided mechanical code-disc problem, the problem includes: range is limited, sensitivity is lower, wearing and tearing problem such as bigger, realized that really the gamut of water level detects.Have the range bigger, better sensitivity, longer mission life, simpler structure, therefore have better adaptability than mechanical code-disc and photoelectric code disk water level gauge; The unrestrained measure that disappears of its software that carries can need not carried out the later stage unrestrained computing that disappears at the water body to fluctuation carry out water level detecting the time and can directly use, it carries keyboard, and the user can be provided with instrument easily, carries LCD and can allow the user directly observe water level elevation at the scene and need not and convert.
Description of drawings:
Fig. 1 is the utility model synoptic diagram,
Fig. 2 is the utility model partial schematic sectional view,
Fig. 3 is the utility model photoelectricity transformation principle figure,
Fig. 4 is the utility model photoelectric switching circuit schematic diagram,
Fig. 5 is the utility model primary control program process flow diagram,
Fig. 6 is instant water level part process flow diagram for the utility model calculates,
Fig. 7 is the utility model embodiment electronics unrestrained design sketch that disappears.
Embodiment: the utility model is further specified below in conjunction with accompanying drawing.
Shown in Fig. 1～5, this photoelectricity water level gauge is made up of water-level detecting mechanism, photoelectricity transformation mechanism, control and display circuit, water-level detecting mechanism directly contacts with the water surface, its gear drive links to each other with photoelectricity transformation mechanism grating wheel, and control and display circuit link to each other with the photoelectric probe output terminal of photoelectricity transformation mechanism.Water-level detecting mechanism comprises float (3), suspension cable (5), rotating disk (6), transmission shaft (7), gear set (2), rotating disk and gear set are loaded on the transmission shaft, suspension cable is around on the rotating disk, the one end has been fastened float (3), the other end has been fastened balance bob (4), balance bob keep steel cable tensioned state and and rotating disk between friction force, float floats on the surface, move up and down with fluctuation in stage, driving rotating disk (water level wheel) by suspension cable rotates, rotating disk drives grating wheel by gear train (gear set and transmission shaft) and rotates, and the lifting of the water surface is converted to the circular motion of grating wheel; The photoelectricity transformation mechanism is formed by grating wheel (8), transmission shaft (7) and aligning grating wheel and by the photoelectric probe (1) that two infrared phototriodes of putting are side by side up and down formed, transmission shaft connects by gear set, grating wheel is fixed on the transmission shaft, and (quantity of blade is 10 to have the circular optical grating construction of the even page or leaf sheet that distributes, precision is 0.3 centimetre), by the infrared ray of page or leaf sheet shading light electric probe, the circular motion of grating wheel is converted to light pulse signal; Control and display circuit are by the main circuit that comprises single-chip microcomputer, solid-state storage, RS-485, RS-232 interface, and LCD, keyboard are formed.
Gear set designs according to big or small gear ratio 2.5: 1, and when rotating disk rotates a circle, pinion wheel and grating wheel rotated for 2.5 weeks, and the pass of effective perimeter L of rotating disk, the number N of teeth of grating wheel and water level precision P (minimum calibration) is:
(ρ is the grating wheel constant to L=ρ ζ NP, ρ=4; ζ is a gear ratio)
In the present embodiment, N=8, L=40cm, ζ=2.5 item:
P＝L/(ρζN)＝40/(4×2.5×8)＝0.5cm
If minimum calibration be become 0.1cm is 1mm, only need to change N, L, ζ, promptly get grating wheel number N of teeth=16, gear ratio ζ=6.25 (the gear wheel number of teeth is 75, and the pinion wheel number of teeth is 12)
P＝L/(ρζN)＝40/(4×6.25×16)＝0.1cm
For adapting to the environment that hydrology regimen is observed and predicted, the rubber waterproof packing ring has been used in the junction of panel and casing in the present embodiment.
Circuit board is installed on the support plate of vertical insertion.The complete machine casing all adopts the aluminium alloy casting moulding, has very strong anti-electromagnetic interference capability and collective's fastness.Complete machine adopts case structure, is convenient to safeguard.
On the circuit design, photoelectric probe, keyboard, display adopt the independent circuits plate, are connected with governor circuit with cable.The size of the resistance R 1 decision electric current on the photoelectric probe, the CPU of governor circuit adopts the MSP430 single-chip microcomputer of low-power consumption, and this single-chip microcomputer has 16 processing poweies, and power consumption only is 280uA, and clock chip can provide time showing as the apolegamy part.The MAX485 chip also uses the integrated circuit of low-power consumption, as communication interface chip; LCD is selected 68 hop count sign indicating number LCD for use, temperature range-10 ℃～50 ℃.
When grating wheel rotates, page or leaf sheet cutting infrared beam, two infrared phototriodes of infrared optical probe constantly repeat " opening " " pass " action successively, thereby on circuit, form pulse signal, be sent to processor through the signal after the shaping, processor can draw direction and the amount of spin that water level wheel rotates according to phase state analysis between the pulse signal.Main circuit, LCD, keyboard: main circuit detects and analyzes pulse signal, draws water level value, and shows instant water level on 6 bit digital LCD.Host computer (data transmission terminal or PC) reads instant waterlevel data or carries out the calibration of water level, time by RS-485 or RS-232.By keyboard, can manually be provided with, calibrate water level or time.The memory of water level, demonstration, transmission are limited by code-disc mechanical dimension no longer, and for example: the instrument water level can directly be set to 1875.46 meters, and 12 photoelectric code disk water level gauges can only show 40.96 meters water level at most, must carry out the secondary conversion and just can obtain water level elevation.The water level range of JLWL-3 is 0～9999.99 meter, can adapt to the level measuring needs of any range Anywhere.
The utility model can pass through the data pre-service, eliminates the water level error (seeing Fig. 6,7) that wave effect causes.Field data show: software disappears, and that the influence of wave is reduced to is original 1/5 for wave, and the authenticity of data is near artificial observation.
Low-power consumption can make battery have longer charge cycle, is the important assurance of system reliability.The photovalve of this water level gauge always works under the non-rated current, and its actual working current only is about 1/100 of its rated operational current, greatly reduces power consumption.Under so low working current, the mode that the selection of the peripheral auxiliary element of photovalve and circuit theory design have taked the two-way receiving tube to carry out signal shaping respectively makes the monitoring reliability of signal and low-power consumption be met simultaneously.The complete machine average power consumption is controlled in the 2mA, guarantees the operate as normal of complete machine simultaneously.Instrument is reduced to minimum to power requirement, reliability is improved.Under the situation of not charging, use the accumulator of 6V/10AH can guarantee instrument stabilizer work 5000 hours more than (being about 208 days).
Claims (4)
1, a kind of photoelectricity water level gauge, it is characterized in that forming by water-level detecting mechanism, opto-electronic conversion mechanism, control and display circuit, water-level detecting mechanism directly contacts with the water surface, its gear drive links to each other with opto-electronic conversion mechanism grating wheel, and control and display circuit link to each other with the photoelectric probe output terminal of photoelectricity transformation mechanism.
2, photoelectricity water level gauge according to claim 1, it is characterized in that water-level detecting mechanism comprises float (3), suspension cable (5), rotating disk (6), transmission shaft (7), gear set (2), rotating disk and gear set are loaded on the transmission shaft, suspension cable is around on the rotating disk, the one end has been fastened float (3), the other end has been fastened balance bob (4), and float floats on the surface.
3, photoelectricity water level gauge according to claim 1, it is characterized in that the photoelectricity transformation mechanism is by grating wheel (8), transmission shaft (7) and aim at grating wheel and be made up of the photoelectric probe (1) that two infrared phototriodes of putting are side by side up and down formed, grating wheel is fixed on the transmission shaft, is the circular optical grating construction that has the even page or leaf sheet that distributes that transmission shaft connects by gear set.
4, photoelectricity water level gauge according to claim 1, it is characterized in that controlling with display circuit by the main circuit that comprises single-chip microcomputer, solid-state storage, RS-485, RS-232 interface, and LCD, keyboard are formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520099959 CN2890852Y (en) | 2005-11-21 | 2005-11-21 | Photoelectric water level meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520099959 CN2890852Y (en) | 2005-11-21 | 2005-11-21 | Photoelectric water level meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2890852Y true CN2890852Y (en) | 2007-04-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520099959 Expired - Fee Related CN2890852Y (en) | 2005-11-21 | 2005-11-21 | Photoelectric water level meter |
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| Country | Link |
|---|---|
| CN (1) | CN2890852Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519549A (en) * | 2011-12-08 | 2012-06-27 | 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 |
| CN102661775A (en) * | 2012-04-26 | 2012-09-12 | 长江水利委员会长江科学院 | Automatic water gage detector and application |
| CN107782414A (en) * | 2017-09-27 | 2018-03-09 | 河海大学 | A kind of electromagnetism float excess surface water depth recorder |
-
2005
- 2005-11-21 CN CN 200520099959 patent/CN2890852Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519549A (en) * | 2011-12-08 | 2012-06-27 | 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 |
| CN102661775A (en) * | 2012-04-26 | 2012-09-12 | 长江水利委员会长江科学院 | Automatic water gage detector and application |
| CN107782414A (en) * | 2017-09-27 | 2018-03-09 | 河海大学 | A kind of electromagnetism float excess surface water depth recorder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070418 Termination date: 20121121 |