CN1010428B - Float-type fluviograph - Google Patents
Float-type fluviographInfo
- Publication number
- CN1010428B CN1010428B CN 86107944 CN86107944A CN1010428B CN 1010428 B CN1010428 B CN 1010428B CN 86107944 CN86107944 CN 86107944 CN 86107944 A CN86107944 A CN 86107944A CN 1010428 B CN1010428 B CN 1010428B
- Authority
- CN
- China
- Prior art keywords
- water level
- potentiometer
- float
- drives
- instrument
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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- Level Indicators Using A Float (AREA)
Abstract
The present invention relates to a measurement instrument used for measuring water level change in a large range. A water level sensor is a float type transmission system, and a float drives a rotary disc via a barrel wire. One end of the float barrel wire is connected with a weight, the rotary disc is coaxially connected with a potentiometer, the float lifts and declines with water levels, the rotary disc rotates with the float and drives a movable arm of the potentiometer to slide on the potentiometer, and then the divider resistance of the potentiometer is changed. Certain voltage is applied at both ends of the potentiometer, so water level change is converted into a changed voltage signal, and the water level sensor can measure the water level. The present invention makes use of microcomputer software and realizes the functions of automatic measurement, record, alarm, man-machine conversation, etc.
Description
The present invention is a kind of water level gauge measuring appratus of float-type of microcomputerization
Utilize float water level (liquid level) up and down unsteady acquisition water level or container in the signal of liquid level change, and then make various liquid levels, the water level gauge measuring appratus is the method for present common employing.
Utilization is arranged on water level (liquid level) and goes up iron core mobile (U.S patent4,345.466 in coil that float rises, descends and drive differential transformer with surface level in the prior art.Approved date Aug, 24,1982) or drive slider on potentiometer, slide (U.S patent4,114.130.Approved date (Sep, 12,1978) thus become electric signal to measure the information translation of SEA LEVEL VARIATION.Though these methods are all reformed machinery meter record (meter record pen is drawn the variation track of water level on meter record paper) to become directly and are measured with electronic measurement technique, but because the change in electric scope of said method is narrow, can only apply to the measurement of liquid level change in fuel tank, the container, be difficult to be applicable to large-scale SEA LEVEL VARIATION measurement requirement, the water level gauge of manufacturing in this way, range is little, and instrumental resolution is low, can not accurately measure.
The present invention has overcome the above-mentioned defective in the prior art, adopted the kinematic train of machinery with electrical bond, convert the variable quantity of water level to an electric signal that changes, and then utilize electronic measurement technique and micro-computer technology, the realization SEA LEVEL VARIATION is big, the measuring accuracy height, the purpose that can carry out unattended measurement automatically.
Fig. 1 is the schematic diagram of this instrument level sensor.Float (1) is placed on that floating drum line (2) one ends tie up on the float on the water surface, connect a weight (4) by rotating rotating disk (3) one ends, when initial water level, the arm of force of levelling float and weight, it is still on the water surface, multiturn potentiometer (5) links to each other with rotating disk is coaxial, float lifting like this with the fluctuation of water level, rotating disk rotates thereupon, the swing arm that drives potentiometer slides on potentiometer, and divider resistance is changed, and applies certain voltage at the potentiometer two ends, the variation of water level is convertible into an electric signal that changes like this, and then the digitizing of carrying out water level is measured automatically.
If represent water level with H, the formulate of this corner-resistance change measurement water level is:
H＝H
0+ωD/2
H in the formula
0Be initial water level, ω is corner (radian), and D is a disk diameter.
Effective record maximum of common water level gauge can only be a circle, this has just limited the measurement range of water level greatly, what the present invention distinguished prior art is that multiturn potentiometer can change multi-turn under the drive of rotating disk, like this in the scope that A/D conversion precision allows, measurement range can reach at double to tens times of increases, simultaneously can make instrument have higher resolution, reach the purpose of accurate measurement.
The time interval that this instrument is measured in measuring automatically can once once be provided with by 24 hours voluntarily from per 2 minutes, in order to grasp writing time exactly, electronic clock, punctual timing was housed in the instrument.With per 30 minutes automatically record once the time calculate at interval, can gather and write down the data more than 90 days.
This instrument is provided with the gamma correction program, finish automatically among the RAM that restores after the correction of measurement data, this be because potentiometer itself have non-linear and use in because about 0.2～0.5% the error that mechanical wear is brought to measuring system.When these errors are eliminated in hope, as long as do the linearity correction input, can carry out gamma correction automatically, owing to adopt the software gamma correction, the maximum error of measurement is no more than 0.5%.
Water level gauge provided by the invention has more comprehensive automatic recording function.
(1) instrument has self-checking function when energising use first, puts number when promptly switching on first on the code-disc of instrument panel, and display shows that immediately the expression complete machine is working properly, can bring into use.
(2) instrument is imported time data by code-disc, and the order of input is a year, month, day, hour, min, incorrect if import data, and instrument re-enters requiring.
(3) instrument required that before work the range input and the input instruction in the time interval are arranged.
(4) have secret word (the PASSO function, this is for fear of not operation personnel's misoperation the encryption technology of being taked to be set in the change machine, instrument only just enters automatic interval measurement state in input behind the secret word.
(5) instrument has the storage expanded function, and after the data field was filled with, instrument started the outer sound-track engraving apparatus of the machine that is associated in automatically, and canned data is existed in the capstan outward.
(6) before measuring automatically, set in advance police circles' water level value (putting number) on demand by the panel code-disc, instrument is recording water level above behind the alarm water level, and the ALM teleswitch on the panel closed for 20 seconds, started warning device (alarm or alarm lamp) whereby.
The alarm water level computing method:
A＝（B-C）/CF×2
Wherein: A-is an alarm water level, the cm of unit.
B-is the alarm water level absolute altitude, unit: cm.
C-position water level gauge null value absolute altitude, unit: cm.
CF-is the water level gauge range, unit: cm.
Whether instrument reports to the police is provided with as requested, and police circles' water level is to send a high position earlier, send low level again.
(7) this instrument considers that the calculating of general water level is to use absolute altitude, and the absolute depth of water for preventing the water level elevation misregistration, has the function of preserving water level elevation in raw data.
(8) the available sound-track engraving apparatus of the extraction of waterlevel data, also available PC-1500 computing machine be to be preserved original recorded data, generally extracts data for well with the tape of sound-track engraving apparatus.
(9) for some special requirements (for example mending the new measurement of check weighing etc.) utensil has the function that restarts with forced measurement, restarting is not change the Data Date of original input and measure the interval, and only record data start anew.
Doing when force measuring, in order to make the former time interval constant, the clock of instrument internal is also done corresponding adjustment, for example measure and be spaced apart 5 minutes, forced measurement once after, clock-inside just adds 5 minutes.
Fig. 2 is the circuit block diagram of this instrument.
Water level gauge circuit provided by the invention all adopts cmos device, the power consumptive province, in non-Measuring Time, has only RAM device energising (200), even in being presented at together with LED during measuring, total current also is no more than 150mA, but use with powered battery also long period in the field at no civil power, is particularly useful for the river, the long-term comparative observation of reservoir.
The A/D converter of native system adopts integrated device MC14433, microsystem can be expanded 64K with 8 bit CPU 80C85, ROM4K, RAM10K, and program is housed among the ROM, and RAM stores mainly as data recording, also have parallel, serial line interface in addition, counting, calendar scheduling peripheral chip.
Two bit code dishes and a button (SET) on the instrument panel are input tools, the LED(light emitting diode indicator) be response tool, when instrument when non-measurement is constantly lifted the SET key will be according to code wheel number as corresponding actions, and its state is shown, realized man-machine conversation.
Claims (2)
1, a kind of being used to measured the water level gauge that water level (liquid level) changes, and it utilizes float to move up and down with water level (liquid level) and drives measuring system.The structure that the invention is characterized in sensor is that float drives a rotating disk, rotating disk drives a potentiometer again and rotates, thereby water level variable is converted to the electric signal of variation, after the A/D conversion, read in the processing that microprocessor carries out gamma correction, measures automatically, and can carry out interactive instrument.
2, as the said water level gauge of claim 1, the rotating disk that it is characterized in that sensor is coaxial the connection with potentiometer, and potentiometer is special accurate multiturn potentiometer, therefore effective recording interval of this water level gauge can satisfy the principle of H=H.+ ω D/2, H is instant water level value, H. be initial water level value, ω is corner (radian), and D is a knuckle radius.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86107944 CN1010428B (en) | 1986-11-18 | 1986-11-18 | Float-type fluviograph |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86107944 CN1010428B (en) | 1986-11-18 | 1986-11-18 | Float-type fluviograph |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN86107944A CN86107944A (en) | 1988-06-01 |
| CN1010428B true CN1010428B (en) | 1990-11-14 |
Family
ID=4803739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86107944 Expired CN1010428B (en) | 1986-11-18 | 1986-11-18 | Float-type fluviograph |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1010428B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1861982B (en) * | 2006-06-07 | 2010-05-12 | 张敏 | Gravity cable winding float-type water gage |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105675087A (en) * | 2016-01-26 | 2016-06-15 | 广州竞标汽车零部件制造有限公司 | Magnetic induction liquid level sensor system for fuel pump |
| CN108979621A (en) * | 2018-10-07 | 2018-12-11 | 陕西科沃电气股份有限公司 | A kind of measuring device and measuring method of oilwell produced fluid amount |
-
1986
- 1986-11-18 CN CN 86107944 patent/CN1010428B/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1861982B (en) * | 2006-06-07 | 2010-05-12 | 张敏 | Gravity cable winding float-type water gage |
Also Published As
| Publication number | Publication date |
|---|---|
| CN86107944A (en) | 1988-06-01 |
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Legal Events
| Date | Code | Title | Description |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| C60 | Other related matters | ||
| RA01 | Restoration of patent right | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |