CN102288247A - Water meter and sampling method - Google Patents
Water meter and sampling method Download PDFInfo
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- CN102288247A CN102288247A CN 201110267269 CN201110267269A CN102288247A CN 102288247 A CN102288247 A CN 102288247A CN 201110267269 CN201110267269 CN 201110267269 CN 201110267269 A CN201110267269 A CN 201110267269A CN 102288247 A CN102288247 A CN 102288247A
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- water meter
- chip microcomputer
- photoelectric sensor
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Abstract
The invention discloses a water meter which comprises a dial, a photoelectric sensor and a single-chip microcomputer; the photoelectric sensor is arranged above the dial; the single-chip microcomputer is electrically connected with the photoelectric sensor; and the surface of the dial is divided into a black part and a white part. The invention also discloses the sampling method of the water meter, a pulse cycle is captured by the single-chip microcomputer, and instantaneous flow is obtained. Because the single-chip microcomputer is added on a water meter of the prior art, the time of the water meter is captured through the single-chip microcomputer, the cycle of the single-chip microcomputer is short and the response is quick, the relative error of the instantaneous flow of the water meter can be quickly obtained, and the purpose of high-efficiency and high-precision measurement can be achieved.
Description
Technical field
The present invention relates to the tolerance field, particularly, relate to a kind of water meter and sampling mode.
Background technology
At present, the pointer surface of water meter is half black half white setting, and a photoelectric sensor is arranged above it, and photoelectric sensor can be reflective to black and white when pointer rotatablely moves, and has photoelectric pulse signal to spread out of.Because it is (this is determined by the water meter self character) of fixing that pointer rotates the water yield (also being pulse equivalency) of a circle representative, when the number of pulses that adds up reaches one regularly, the water yield of water meter record also is certain, the concrete demonstration that need not to read water meter this moment, only need umber of pulse be multiply by the water yield that pulse equivalency can draw this moment, compare with the water yield of standard again, can draw the relative error of water meter.
Because the accuracy requirement of the calibrating installation of water meter is 0.2%, so require the water yield error of the quantity representative of pulse in once testing also must not be higher than 0.2%, with LXS-15C type water meter is example, pulse equivalency is 0.08(liter/pulse), that test water yield should reach the 0.08/0.002=40 liter at least, with this model 30(liter/hour) flow, the test required time be 1.3 hours.So low, low precision of efficiency of measurement of existing water meter.
Summary of the invention
The objective of the invention is to,, propose a kind of water meter and sampling mode, to realize high-level efficiency, advantage of high precision at the problems referred to above.
For achieving the above object, the technical solution used in the present invention is:
A kind of water meter comprises dial plate, photoelectric sensor and single-chip microcomputer, and described photoelectric sensor is arranged on the top of dial plate, and described single-chip microcomputer and photoelectric sensor are electrically connected, and the watch face of described dial plate is divided into black and white two parts.
And a kind of sampling mode of water meter, may further comprise the steps:
After photoelectric sensor receives the light of light source of watch face reflection, photoelectric sensor output photoelectric pulse signal;
Single-chip microcomputer grasps the interval time of above-mentioned two pulse signals;
Draw the instantaneous delivery of water meter according to time of the pulse signal of above-mentioned extracting;
Above-mentioned instantaneous delivery and normal flow are thought comparison, draw the relative error that water meter is measured.
Technical scheme of the present invention is by the technical single-chip microcomputer that adds at existing water meter, by single-chip microcomputer the water meter time of carrying out is grasped, short cycle length because of single-chip microcomputer, response is fast, the instantaneous delivery relative error of water meter can be drawn rapidly, the purpose of high-level efficiency, high-acruracy survey can be realized.
Other features and advantages of the present invention will be set forth in the following description, and, partly from instructions, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the instructions of being write, claims and accompanying drawing.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of instructions, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the structural representation of the described water meter of the embodiment of the invention;
Fig. 2 is the vertical view of water meter watch face shown in Figure 1;
Fig. 3 is the process flow diagram of the described water meter sampling mode of the embodiment of the invention.
In conjunction with the accompanying drawings, Reference numeral is as follows in the embodiment of the invention:
The 1-dial plate; The 2-watch face.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in qualification the present invention.
As shown in Figure 1 and Figure 2, the watch face of dial plate is divided into black and white two parts, and a photoelectric sensor is installed above dial plate, and photoelectric sensor links together by lead and single-chip microcomputer.
As shown in Figure 3, the sampling of water meter is divided into following a few step:
In step 101, after photoelectric sensor receives the light of light source of watch face reflection, photoelectric sensor output photoelectric pulse signal;
In step 102, single-chip microcomputer grasps the interval time of two pulse signals;
In step 103, draw the instantaneous delivery of water meter according to time of the pulse signal that grasps; Measure the time that pointer turns around (said recurrence interval promptly), time of grasping according to monolithic and pointer time of turning around compares then, just can draw the flow of water meter in test process.
In step 104, instantaneous delivery and normal flow are thought comparison, draw the relative error that water meter is measured.
Its concrete measurement is as follows: when being in the black and white conversion or deceiving conversion in vain, and photoelectric sensor output signals, formation square wave signal source.Photoelectric sensor was exported for the two adjacent time intervals and is a recurrence interval, and in recurrence interval one by one, water meter revolves and makes a circle.And normal flow and pointer rotate the indicated water yield of a circle, are two set data.The former is the normal stream value that the Time Calculation of the water yield that produces of test process and use is come out, and the latter is a numerical value of having arranged in the water meter design.So, just can draw the flow of water meter in test process, again he and normal flow one be contrasted the relative error that can draw water meter as long as we measure the time that pointer turns around (said recurrence interval promptly).
When the water meter rotation begins to measure, because it is (this is determined by the water meter self character) of fixing that pointer rotates the water yield (also being pulse equivalency) of a circle representative, carry out the extracting of time simultaneously by single-chip microcomputer, because the response time of single-chip microcomputer is 1.28 * 10-7 second, can ignore fully, can in a recurrence interval, can draw the water meter instantaneous delivery like this, compare with the flow of standard again, can draw the instantaneous delivery relative error of water meter.Because on some test points, the time of use is consistent, so the instantaneous delivery relative error is equal to the water meter relative error.The error amount of this water meter can just can calculated so in a flash.
In sum, the technical single-chip microcomputer that adds of the existing water meter of the present invention grasps the water meter time of carrying out by single-chip microcomputer, because of single-chip microcomputer weak point cycle length, response is fast, can draw the instantaneous delivery relative error of water meter rapidly, can realize the purpose of high-level efficiency, high-acruracy survey.
It should be noted that at last: the above only is the preferred embodiments of the present invention, be not limited to the present invention, although the present invention is had been described in detail with reference to previous embodiment, for a person skilled in the art, it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. a water meter is characterized in that, comprises dial plate, photoelectric sensor and single-chip microcomputer, and described photoelectric sensor is arranged on the top of dial plate, and described single-chip microcomputer and photoelectric sensor are electrically connected, and the watch face of described dial plate is divided into black and white two parts.
2. the sampling mode of the described water meter of claim 1 is characterized in that, may further comprise the steps:
After photoelectric sensor receives the light of light source of watch face reflection, photoelectric sensor output photoelectric pulse signal;
Single-chip microcomputer grasps the interval time of above-mentioned two pulse signals;
Draw the instantaneous delivery of water meter according to time of the pulse signal of above-mentioned extracting;
Above-mentioned instantaneous delivery and normal flow are thought comparison, draw the relative error that water meter is measured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110267269 CN102288247A (en) | 2011-09-08 | 2011-09-08 | Water meter and sampling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110267269 CN102288247A (en) | 2011-09-08 | 2011-09-08 | Water meter and sampling method |
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| Publication Number | Publication Date |
|---|---|
| CN102288247A true CN102288247A (en) | 2011-12-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN 201110267269 Pending CN102288247A (en) | 2011-09-08 | 2011-09-08 | Water meter and sampling method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2114148U (en) * | 1992-02-20 | 1992-08-26 | 连云港水表厂 | Means for testing or calibrating water meter using microcomputers |
| CN2757100Y (en) * | 2004-11-05 | 2006-02-08 | 北京农业信息技术研究中心 | Agriculture water meter pulse producing device |
| JP2008003012A (en) * | 2006-06-23 | 2008-01-10 | Takahata Seiko Kk | Electronic water meter |
-
2011
- 2011-09-08 CN CN 201110267269 patent/CN102288247A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2114148U (en) * | 1992-02-20 | 1992-08-26 | 连云港水表厂 | Means for testing or calibrating water meter using microcomputers |
| CN2757100Y (en) * | 2004-11-05 | 2006-02-08 | 北京农业信息技术研究中心 | Agriculture water meter pulse producing device |
| JP2008003012A (en) * | 2006-06-23 | 2008-01-10 | Takahata Seiko Kk | Electronic water meter |
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Application publication date: 20111221 |