CN104165817B - Radial flow sediment content real-time measurement apparatus and measuring method - Google Patents

Radial flow sediment content real-time measurement apparatus and measuring method Download PDF

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CN104165817B
CN104165817B CN201410426952.XA CN201410426952A CN104165817B CN 104165817 B CN104165817 B CN 104165817B CN 201410426952 A CN201410426952 A CN 201410426952A CN 104165817 B CN104165817 B CN 104165817B
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bucket
water
time
weight
measuring
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CN104165817A (en
Inventor
刘明义
许晓鸿
高金花
张瑜
孙传生
徐惠基
崔海锋
闫雪莲
崔斌
王岩
张丽君
隋媛媛
申聪颖
王永丰
张军海
赵书军
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Changchun Heli soil and water conservation science and Technology Co., Ltd.
Jilin Water and Soil Conservation Science Research Institute
Changchun Institute Technology
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Jilin water and soil conservation science research institute
Changchun Institute Technology
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Abstract

A kind of radial flow sediment content real-time measurement apparatus and measuring method, belong to field of measuring technique, adopt and measure bucket, LOAD CELLS, ajutage, motorized valve, liquid level sensor, controller and processor formation, measuring bucket is placed in LOAD CELLS, on ajutage at the bottom of motorized valve is arranged on barrel, liquid level sensor is arranged on to be measured above bucket, and processor connects LOAD CELLS, motorized valve and liquid level sensor respectively by controller.The highest and lowest water level in setting measurement bucket and motorized valve valve opening, closing valve time; Muddy water is imported continuously and measures in bucket, measure inner bucket water position height and weight in real time, and the numerical value obtained is sent to processor by controller; When water level rises to peak level, motorized valve is opened, and the water measured in bucket is discharged, and when water level is reduced to lowest water level, motorized valve cuts out; Processor processes the parameter obtained and set, and obtains the weight of runoff and sediment in bucket.The present invention can measure the radial flow sediment content of different soil property exactly, and can realize on-line measurement.

Description

Radial flow sediment content real-time measurement apparatus and measuring method
Technical field
The invention belongs to field of measuring technique, be specifically related to a kind of device measuring sediment charge, and utilize the method for such measurement device runoff volume.
Background technology
Current measurement method that radial flow sediment content adopts has two kinds, one adopts the direct method of measurement, if oven drying method is also known as weight method, namely a certain amount of sample is got, measure its original weight and the weight after drying, thus determine the silt content in muddy water, but because oven drying method need be dried testing sample, and bake out temperature is generally 105 °, heating needs 11 hours, high temperature and long-term heating can cause soil with organic matter to be carbonized, and make the silt content of measurement less than normal, also make whole measuring process waste time and energy to bake out temperature and the requirement of heat time.People use the alcohol combustion dry method adopted during oven drying method in-site measurement silt content that surveyed silt content can be made to produce comparatively big error in the wild, and can not realize real-time online detection.Another kind method is the indirect method of measurement, as capacitance method, laser method, gamma-rays method etc., but affects by temperature, sand grain etc., and its measuring error is comparatively large, especially sediment concentration very large or very little time, be difficult to realize Measurement accuracy.This seminar once applied for utility model patent " measuring device for slit content in muddy water " (patent No. is ZL201120215645.9) in 2011, but find in actual use, when the sediment charge in muddy water is greater than 3%, its measuring accuracy significantly declines, reason is: originally adopt a pressure transducer to measure liquid level, liquid level is measured with a ultrasonic sensor, two liquid level differences are utilized to calculate sediment charge in muddy water, but, when the silt in muddy water is too many, silt covers the measuring surface of pressure transducer, that measuring accuracy significantly declines.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of radial flow sediment content real-time measurement apparatus.
Invention provides the measuring method utilizing this device simultaneously.
The scheme of the technical matters that the present invention solves adopts to measure bucket, LOAD CELLS, ajutage, motorized valve, liquid level sensor, controller and processor form radial flow sediment content real-time measurement apparatus, measuring bucket is placed in LOAD CELLS by lower carriage, ajutage connects measures bottom of the barrel, motorized valve is arranged on ajutage, measure on bucket along being fixed with upper bracket, liquid level sensor is arranged on by upper bracket to be measured above bucket, the filtering tube of liquid level sensor is in measurement bucket, controller connects LOAD CELLS respectively, motorized valve and liquid level sensor, processor connection control device.Measure to have above bucket and muddy water collected and injects the tank in measurement bucket.
Along there being a circle flanging on measurement bucket, ground can be kept measuring after bucket is filled with water like this not producing deformation.
The present invention completes the measurement of radial flow sediment content by following steps:
1, by the peak level in controller setting measurement bucket , lowest water level , setting motorized valve duration of valve opening , closing valve time ; Measuring the bucket floorage measuring bucket is , tank is to the height at the bottom of bucket measuring bucket ;
2, by tank, the muddy water collected is imported in measurement bucket continuously, measure inner bucket water position height in real time by liquid level sensor, measured the weight of inner bucket water by LOAD CELLS in real time, and the numerical value obtained is sent to processor by controller;
3, when water level rises to peak level time, controller instruction motorized valve is opened, and the water measured in bucket is discharged by ajutage, when water level is reduced to lowest water level time, controller instruction motorized valve cuts out;
4, processor processes the parameter obtained and set, and the weight obtaining runoff and sediment in bucket is:
: the weight (Kg) measuring runoff and sediment in bucket
: the effective muddy water in current bucket measures weight (Kg)
The floorage of bucket is , the muddy water water level in the bucket measured in real time by liquid level sensor , the weight of muddy water is measured by LOAD CELLS , in muddy water, the proportion of silt is , the proportion of clear water is , C is air content in water, wherein , , C all measures by prior art;
And total run-off in actual measurement process for:
: peak level height in the bucket of setting;
: lowest water level height in the bucket of setting;
Namely in actual measurement process , , when reaching upper lower limit value time, the motorized valve automatic switch of device bottom;
: flow into the time that in actual measurement bucket, the water yield is used, the automatic record of computer processor;
: discharge water number of times, the automatic record of computer processor;
: duration of valve opening, refers to start to opening required time completely from motorized valve, the automatic record of computing machine;
: closing valve time, refers to close to from motorized valve close required time completely, the automatic record of computing machine;
: discharge time, refers to open to discharge water to closing end motorized valve completely from motorized valve to discharge water required time, the automatic record of computer processor.
When actual measurement, time 0 critical point at the bottom of the water level in bucket reaches barrel (bottom diagram drum), in bucket, there is residual muddy water weight ( for fixed value, artificial calibration, set-point), then on the basis of Preliminary Determination silt weight, consider that the effective silt weight of reality removed in bucket under existing residual muddy water weights in bucket is:
: the weight (Kg) considering to remove runoff and sediment in the bucket of existing residual muddy water gravimetry in bucket;
In addition, when actual measurement, owing to there being the impulse force of water, also should cut when calculating effective silt weight, impulse force is , for present flow rate, , for flowing into the time that in current actual measurement bucket, the water yield is used; for the flow velocity when current actual measurement bucket middle water level drop, , for the density of muddy water, , for acceleration of gravity.
The effective silt weight of reality now in bucket is:
Namely ;
Therefore consider to remove with the actual silt weight that finally records of impact be:
W is actual silt weight more accurately.
This programme have employed LOAD CELLS, makes sediment charge unrestricted.The LOAD CELLS adopted and high-accuracy liquid level sensor are measured the weight and volume of liquid to runoff muddy water, by interpolation calculation, can measure the radial flow sediment content of different soil property exactly, and can realize on-line measurement.
The present invention, in soil Erosion Research field, measures the sediment charge in runoff muddy water rapidly and accurately, in land comprehensive Controlling and developing utilizes and sewage treatment area effective monitoring, for geologic hazard (as rubble flow) prediction provides Data support.The radial flow sediment content of different soil property can be measured rapidly and accurately, realize on-line continuous and measure, be not subject to the impact of the conditions such as the temperature of muddy water.
Accompanying drawing explanation
Fig. 1 is the principle schematic measured;
Fig. 2 is the cut-open view that apparatus of the present invention measure barrel section.
Embodiment
Example one, apparatus of the present invention are by measuring bucket 1, LOAD CELLS 3, ajutage 4, motorized valve 5, liquid level sensor 7, controller 9 and processor 10 are formed, measuring bucket 1 is placed in LOAD CELLS 3 by lower carriage 2, ajutage 4 connects to measure at the bottom of bucket 1, motorized valve 5 is arranged on ajutage 4, measure on bucket 1 along being fixed with upper bracket 6, liquid level sensor 7 is arranged on by upper bracket 6 to be measured above bucket 1, the filtering tube 8 of liquid level sensor 7 is in measurement bucket 1, controller 9 connects LOAD CELLS 3 respectively, motorized valve 5 and liquid level sensor 7, processor 10 connection control device 9.Measure to have above bucket 1 and muddy water collected and injects the tank in measurement bucket.Along there being a circle flanging 11 on measurement bucket 1.Measuring in the ajutage 4 bottom bucket 1 and between motorized valve 5 is residual muddy water 12.
The present invention completes the measurement of radial flow sediment content by following steps:
1, by the peak level in controller setting measurement bucket , lowest water level , setting motorized valve duration of valve opening , closing valve time ; Measuring the bucket floorage measuring bucket is , tank is to the height at the bottom of bucket measuring bucket ;
2, by tank, the muddy water collected is imported in measurement bucket continuously, measure inner bucket water position height in real time by liquid level sensor, measured the weight of inner bucket water by LOAD CELLS in real time, and the numerical value obtained is sent to processor by controller;
3, when water level rises to peak level time, controller instruction motorized valve is opened, and the water measured in bucket is discharged by ajutage, when water level is reduced to lowest water level time, controller instruction motorized valve cuts out;
4, processor processes the parameter obtained and set, and the weight obtaining runoff and sediment in bucket is:
: the weight (Kg) measuring runoff and sediment in bucket
: the effective muddy water in current bucket measures weight (Kg)
The floorage of bucket is , the muddy water water level in the bucket measured in real time by liquid level sensor , the weight of muddy water is measured by LOAD CELLS , in muddy water, the proportion of silt is , the proportion of clear water is , C is air content in water, wherein , , C all measures by prior art;
And total run-off in actual measurement process for:
: peak level height in the bucket of setting;
: lowest water level height in the bucket of setting;
Namely in actual measurement process , , when reaching upper lower limit value time, the motorized valve automatic switch of device bottom;
: flow into the time that in actual measurement bucket, the water yield is used, the automatic record of computer processor;
: discharge water number of times, the automatic record of computer processor;
: duration of valve opening, refers to start to opening required time completely from motorized valve, the automatic record of computing machine;
: closing valve time, refers to close to from motorized valve close required time completely, the automatic record of computing machine;
: discharge time, refers to open to discharge water to closing end motorized valve completely from motorized valve to discharge water required time, the automatic record of computer processor.
Run-off total in example two, apparatus of the present invention and actual measurement process with example one, actual effectively silt weight is:
: the weight (Kg) considering to remove runoff and sediment in the bucket of existing residual muddy water gravimetry in bucket.
Run-off total in example three, apparatus of the present invention and actual measurement process with example one, actual effectively silt weight is:
Can reflect below by way of table 1 and table 2 order of accuarcy that prior art and the technology of the present invention are measured, table 1 is the measurement result of prior art, and table 2 is the measurement result of the technology of the present invention.
Table 1
Table 2
Result shows: the numerical value measured with original differential pressure method, and the error of many points has exceeded 10%; Data (2014) maximum error of surveying by existing method is less than 5%.

Claims (3)

1. a method for real-time measurement for radial flow sediment content, is characterized in that being completed by following steps:
(1) by the peak level in controller setting measurement bucket , lowest water level , setting motorized valve duration of valve opening , closing valve time ; Measuring the bucket floorage measuring bucket is , tank is to the height at the bottom of bucket measuring bucket ;
(2) by tank, the muddy water collected is imported in measurement bucket continuously, measure inner bucket water position height in real time by liquid level sensor, measured the weight of inner bucket water by LOAD CELLS in real time, and the numerical value obtained is sent to processor by controller;
(3) when water level rises to peak level time, controller instruction motorized valve is opened, and the water measured in bucket is discharged by ajutage, when water level is reduced to lowest water level time, controller instruction motorized valve cuts out;
(4) processor processes the parameter obtained and set, and the weight obtaining runoff and sediment in bucket is:
: the weight measuring runoff and sediment in bucket
: the effective muddy water in current bucket measures weight
The floorage of bucket is , the muddy water water level in the bucket measured in real time by liquid level sensor , the weight of muddy water is measured by LOAD CELLS , in muddy water, the proportion of silt is , the proportion of clear water is , C is air content in water, wherein , , C all measures by prior art;
And total run-off in actual measurement process for:
: peak level height in the bucket of setting;
: lowest water level height in the bucket of setting;
: flow into the time that in actual measurement bucket, the water yield is used, the automatic record of computer processor;
: discharge water number of times, the automatic record of computer processor;
: duration of valve opening, refers to start to opening required time completely from motorized valve, the automatic record of computing machine;
: closing valve time, refers to close to from motorized valve close required time completely, the automatic record of computing machine;
: discharge time, refers to open to discharge water to closing end motorized valve completely from motorized valve to discharge water required time, the automatic record of computer processor.
2. measuring method according to claim 1, is characterized in that: the weight removing runoff and sediment in the bucket measured after existing residual muddy water weight in bucket for:
Wherein, for there being residual muddy water weight in bucket.
3. measuring system according to claim 2 carries out the method measured, it is characterized in that: remove with impact after the actual silt weight W that records be:
That is:
Wherein, W 2for the impulse force of water, ;
for present flow rate, ;
for flowing into the time that in current actual measurement bucket, the water yield is used;
for the flow velocity when current actual measurement bucket middle water level drop;
for the density of muddy water, ;
for acceleration of gravity.
CN201410426952.XA 2014-08-27 2014-08-27 Radial flow sediment content real-time measurement apparatus and measuring method Active CN104165817B (en)

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CN105371904B (en) * 2015-10-16 2018-05-29 西北农林科技大学 A kind of runoff and sediment real time automatic measuring device and measuring method
CN106404135A (en) * 2016-11-17 2017-02-15 西安理工大学 Automatic water and sediment measuring and weighing device
CN106932297A (en) * 2017-03-13 2017-07-07 北京林业大学 Sediment charge automatic measurement system in a kind of runoff

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