CN106679774A - Ultrasonic open-channel flowmeter liquid level error on-site detection apparatus and method - Google Patents
Ultrasonic open-channel flowmeter liquid level error on-site detection apparatus and method Download PDFInfo
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- CN106679774A CN106679774A CN201710125866.9A CN201710125866A CN106679774A CN 106679774 A CN106679774 A CN 106679774A CN 201710125866 A CN201710125866 A CN 201710125866A CN 106679774 A CN106679774 A CN 106679774A
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- level
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- liquid level
- error
- channel flowmeter
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/20—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of apparatus for measuring liquid level
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- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The invention discloses an ultrasonic open-channel flowmeter liquid level error on-site detection apparatus and method. The ultrasonic open-channel flowmeter liquid level error on-site detection apparatus comprises a datum plate, a liquid level plate, a supporting guide rod, an upper top plate and a depth vernier caliper, wherein the datum plate, the liquid level plate and the upper top plate are arranged in parallel and supported by virtue of the supporting guide rod, the liquid level plate capable of moving up and down is arranged in the middle, the depth vernier caliper is arranged at one side of the upper top plate and penetrates through the upper top plate to the liquid level plate, and the center of the upper top plate is provided with a detected liquid level sensor detection and installation position. By optimizing the apparatus structure, a liquid level simulation function and a liquid level measurement function are integrated, the limitation of the existing standard liquid level gauge is overcome, and the technical difficulty of the liquid level error on-site detection of an ultrasonic open-channel flowmeter can be solved.
Description
Technical field
The present invention relates to a kind of detection means, and in particular to a kind of ultrasonic open channel flowmeter level error Site Detection dress
Put and method.
Background technology
Ultrasonic open channel flowmeter is widely used in discharge of sewage metering, mainly by weir slot, liquid level sensor, liquid level
Flow changes instrument（Secondary meter）Composition.Its operation principle is the setting standard weir slot in open channel（As Baxeer slot, three
Angular sharp-crested weir etc.）, by liquid level sensor measuring weir trough inner water stream liquid level, then the flow and liquid level for flowing through weir notch is in single
Level value, according to corresponding liquid level-flow rate calculation formula, is converted into flow value by value relation.Level gauging is ultrasound wave open channel
Effusion meter carries out the core link of accurate metering, and weir slot volume is larger, is typically all fixedly installed in channel, therefore super
Sound wave open-channel meter needs to carry out on-site proving.Industry standard HJ/T 15-2007《Environmental protection product technical requirements ultrasound
Ripple open-ditch sewage flowmeter》Requirement to liquid level sensor level gauging error is≤3mm.Detection method is：By level sensing
Device is arranged on standard liquidometer, is read standard liquidometer indicating value and tested liquid level sensor indicating value, is calculated tested liquid level
The level gauging error of sensor, the resolving power requirement≤0.5mm of standard liquidometer.
Conventional liquidometer species is a lot, should select contactless structure as far as possible when measuring industry for the discharge of sewage, existing
Some contact-free level meters mainly have ultrasonic liquid level meter and radar level gauge, but its certainty of measurement is commonly ± 3mm, resolving power
For 1mm, it is impossible to use as standard liquidometer.In contact liquid level meter, level measurement resolving power can reach only having for 0.5mm
Magnetostriction liquidometer, but due to its structural principle characteristic, in level gauging in the presence of blind area（Typically≤60mm）, and for a long time
Corrosion can occur in being applied to wastewater media, affect certainty of measurement, use as standard liquidometer unsatisfactory.
With the progress of society, mankind's environmental consciousness are constantly strengthened, and discharge of sewage metering becomes an emphasis of government
Work.It is badly in need of changing existing thinking, develops a kind of new level error on-site detecting device, realize ultrasonic open channel flowmeter
Magnitude tracing.
The content of the invention
The present invention is directed to the deficiencies in the prior art, it is proposed that a kind of ultrasonic open channel flowmeter level error Site Detection dress
Put.
The present invention solves the technical scheme taken of technical problem：
The present invention include datum plate, level plate, support guide bar, upper plate and vernier depth gauge, datum plate, level plate and on
It is arranged in parallel between top board three, is supported by support guide bar, level plate moving up and down is located at centre, depth vernier calliper
Chi is arranged on the side of upper plate, and through upper plate to level plate, upper plate central authorities are provided with tested liquid level sensor detection
Installation site.
Furtherly, device should be at horizontality in detection process, and keeping parallelism state is answered in the lifting of level plate.
Universal level-metre is housed in datum plate upper center position, for the horizontality of display device；Equipped with heavy type below datum plate
Fang bolt, for the horizontality of adjusting means；Suitable support guide bar is selected, by rationally controlling guiding clearance, really
Protect the state that runs parallel of level plate.
The method that level error Site Detection is carried out using this device：
Step 1, device horizontal adjustment：By adjusting heavy fang bolt, it is located at the instruction bead in Universal level-metre transparent
Hemisphere face body center, it is ensured that device is in horizontality.
Step 2, installs tested liquid level sensor：Tested liquid level sensor is fixedly mounted on into upper plate middle position.
Step 3, the setting of liquid level zero point：Level plate is minimized into position, now the upper datum level simulation canal of level plate
Road bottom surface, as liquid level zero point, reads the reading a1 of simultaneously registered depth slide gauge；Tested liquid level sensor is set so as to when
Front liquid level show value is 0.
Step 4, level error measurement：As requested, by level plate rise to needed for measurement liquid level, and with lock
Nut is fixed level plate and is at resting state.The reading a2 of simultaneously registered depth slide gauge is read, titer is calculated
Place value Hs=a1-a2；Read and record the level value H that tested liquid level sensor shows again, be calculated level error E=H-Hs.
By adjusting liquid level Board position, level error measurement is carried out to multiple level values, ultrasonic open channel flowmeter level sensing is realized
The magnitude tracing of device.
Beneficial effects of the present invention：
1st, by the optimization design to apparatus structure, the integrated of liquid level analog functuion and level gauging function is realized, is overcome
The limitation of existing standard liquidometer, solves the technical barrier of ultrasonic open channel flowmeter level error Site Detection；
2nd, by the level plate of device, simulated solution bit function realizes that in measurement process fixing level plate locking nut makes at which
In resting state, to realize the static measurement of level error, the dynamic survey that level fluctuation is introduced when effectively having evaded real flow measurement
Amount error, significantly improves level error measurement reproducibility；
3rd, level gauging function by vernier depth gauge realize, existing standard liquidometer certainty of measurement it is not high, show differentiate
Under conditions of power is up to 0.5mm, change thinking, seeking breakthrough realizes the measurement of standard level value with vernier depth gauge, show
Show that resolving power reaches 0.02mm, significantly improve level error certainty of measurement.
Description of the drawings
Fig. 1 is schematic structural view of the invention.
Specific embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in figure 1, the present embodiment includes the trip of circular horizon plate 2, level plate 5, support guide bar 6, upper plate 7 and depth
Mark slide calliper rule 9, be arranged in parallel between datum plate, level plate and upper plate three, are supported by three support guide bars, can on move down
Dynamic level plate is located at centre, and which is fixed by locking nut 4, and vernier depth gauge is arranged on the side of upper plate, and through upper
To level plate, upper plate central authorities are provided with the detection installation site of tested liquid level sensor 8 to top board.Datum plate upper center position fills
There is the Universal level-metre 3 for display device horizontality, equipped with the heavy type for adjusting means horizontality below datum plate
Fang bolt 1.
The detection process of said apparatus is：
Step 1, device horizontal adjustment：By adjusting heavy fang bolt, it is located at the instruction bead in Universal level-metre transparent
Hemisphere face body center, it is ensured that device is in horizontality.
Step 2, installs tested liquid level sensor：Tested liquid level sensor is fixedly mounted on into upper plate middle position.
Step 3, the setting of liquid level zero point：Level plate is minimized into position, now the upper datum level simulation canal of level plate
Road bottom surface, as liquid level zero point, reads the reading a1 of simultaneously registered depth slide gauge；Tested liquid level sensor is set so as to when
Front liquid level show value is 0.
Step 4, level error measurement：As requested, by level plate rise to needed for measurement liquid level, and with lock
Nut is fixed level plate and is at resting state.The reading a2 of simultaneously registered depth slide gauge is read, titer is calculated
Place value Hs=a1- a2；Read and record the level value H that tested liquid level sensor shows again, be calculated level error E=H-
Hs.By adjusting liquid level Board position, level error measurement is carried out to multiple level values, realize that ultrasonic open channel flowmeter liquid level is passed
The magnitude tracing of sensor.
Claims (3)
1. ultrasonic open channel flowmeter level error on-site detecting device, it is characterised in that：Including datum plate, level plate, support
Guide post, upper plate and vernier depth gauge, be arranged in parallel between datum plate, level plate and upper plate three, are led by supporting
Support to bar, level plate moving up and down is located at centre, and vernier depth gauge is arranged on the side of upper plate, and runs through upper top
To level plate, upper plate central authorities are provided with tested liquid level sensor detection installation site to plate.
2. ultrasonic open channel flowmeter level error on-site detecting device according to claim 1, it is characterised in that：Device
Horizontality, and the lifting keeping parallelism state of level plate are in detection process；It is equipped with datum plate upper center position
Universal level-metre, for the horizontality of display device；Equipped with heavy fang bolt below datum plate, for the water of adjusting means
Level state.
3. ultrasonic open channel flowmeter level error in-situ check and test method, using the device described in claim 2, it is characterised in that
The method is comprised the following steps：
Step 1, device horizontal adjustment：By adjusting heavy fang bolt, it is located at the instruction bead in Universal level-metre transparent
Hemisphere face body center, it is ensured that device is in horizontality；
Step 2, installs tested liquid level sensor：Tested liquid level sensor is fixedly mounted on into upper plate middle position；
Step 3, the setting of liquid level zero point：Level plate is minimized into position, now the upper datum level simulation channel bottom of level plate
Face, as liquid level zero point, reads the reading a1 of simultaneously registered depth slide gauge；Tested liquid level sensor is set so as to current liquid
Position show value is 0；
Step 4, level error measurement：As requested, the liquid level of measurement needed for rise to level plate, and use locking nut
Fixed level plate is at resting state；The reading a2 of simultaneously registered depth slide gauge is read, standard level value is calculated
Hs=a1-a2；Read and record the level value H that tested liquid level sensor shows again, be calculated level error E=H-Hs；Pass through
Liquid level Board position is adjusted, level error measurement is carried out to multiple level values, ultrasonic open channel flowmeter liquid level sensor is realized
Magnitude tracing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710125866.9A CN106679774A (en) | 2017-03-05 | 2017-03-05 | Ultrasonic open-channel flowmeter liquid level error on-site detection apparatus and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710125866.9A CN106679774A (en) | 2017-03-05 | 2017-03-05 | Ultrasonic open-channel flowmeter liquid level error on-site detection apparatus and method |
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| CN106679774A true CN106679774A (en) | 2017-05-17 |
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| CN201710125866.9A Pending CN106679774A (en) | 2017-03-05 | 2017-03-05 | Ultrasonic open-channel flowmeter liquid level error on-site detection apparatus and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108917881A (en) * | 2018-09-25 | 2018-11-30 | 长春工程学院 | From scour outlet channel automatic water level measurement device and its operating method |
| FR3096131A1 (en) * | 2019-05-17 | 2020-11-20 | Cetenis | WATER HEIGHT SIMULATION DEVICE AND PROCEDURE FOR VERIFYING THE WATER HEIGHT MEASUREMENT OF MEASURING EQUIPMENT BY THIS DEVICE |
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| CN201247077Y (en) * | 2008-06-27 | 2009-05-27 | 东莞市敏达测控技术有限公司 | Calibration instrument for testing linear sensor |
| CN201903386U (en) * | 2010-10-22 | 2011-07-20 | 舟山市质量技术监督检测院 | Movable liquid-groove type calibrating device for liquid level meter |
| CN102914347A (en) * | 2012-11-09 | 2013-02-06 | 中国计量学院 | Liquid level sensor having self-calibration function and sensing method thereof |
| CN204269204U (en) * | 2014-12-18 | 2015-04-15 | 重庆川仪自动化股份有限公司 | The simulated testing system of ultrasonic level gage |
| CN206531550U (en) * | 2017-03-05 | 2017-09-29 | 浙江省计量科学研究院 | Ultrasonic open channel flowmeter level error on-site detecting device |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201247077Y (en) * | 2008-06-27 | 2009-05-27 | 东莞市敏达测控技术有限公司 | Calibration instrument for testing linear sensor |
| CN201903386U (en) * | 2010-10-22 | 2011-07-20 | 舟山市质量技术监督检测院 | Movable liquid-groove type calibrating device for liquid level meter |
| CN102914347A (en) * | 2012-11-09 | 2013-02-06 | 中国计量学院 | Liquid level sensor having self-calibration function and sensing method thereof |
| CN204269204U (en) * | 2014-12-18 | 2015-04-15 | 重庆川仪自动化股份有限公司 | The simulated testing system of ultrasonic level gage |
| CN206531550U (en) * | 2017-03-05 | 2017-09-29 | 浙江省计量科学研究院 | Ultrasonic open channel flowmeter level error on-site detecting device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108917881A (en) * | 2018-09-25 | 2018-11-30 | 长春工程学院 | From scour outlet channel automatic water level measurement device and its operating method |
| FR3096131A1 (en) * | 2019-05-17 | 2020-11-20 | Cetenis | WATER HEIGHT SIMULATION DEVICE AND PROCEDURE FOR VERIFYING THE WATER HEIGHT MEASUREMENT OF MEASURING EQUIPMENT BY THIS DEVICE |
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