CN205246140U - Flow rate measuring device - Google Patents
Flow rate measuring device Download PDFInfo
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- CN205246140U CN205246140U CN201521108406.8U CN201521108406U CN205246140U CN 205246140 U CN205246140 U CN 205246140U CN 201521108406 U CN201521108406 U CN 201521108406U CN 205246140 U CN205246140 U CN 205246140U
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Abstract
The utility model provides a flow rate measuring device, include: go out the flow tube for the introduction rivers that await measuring, the header tank for gather out the rivers that the flow tube was introduced, the measurement component for measure the weight and the transmission of header tank weight, and external equipment, be used for receiving weight. This flow rate measuring device has advantages such as the measured data precision is high, use flow range is wide, data temporal resolution is high, the data fluctuation is little, is particularly suitable for the continuous runoff of low discharge and measures.
Description
Technical field
The utility model relates to flow measurement field, particularly a kind of flow measurement device.
Background technology
Flood is one of main natural calamity of China, and inferior big vast simulation precision is that flood is carried out to standardThe key issue of true early warning prevention, and be accurately to simulate hydrologic process to the understanding of Dynamic Characteristic of Rainfall-infiltration-runoff processCore. Hydrological experiment is the important means of research Dynamic Characteristic of Rainfall-infiltration-runoff process, Flow Observation in hydrological experimentTemporal resolution and precision etc. be directly connected to the quality of data of hydrological experiment, and affect follow-up analysis withResearch.
Flow-measuring method in hydrological experiment is mainly triangular-notch weir method, volumetric method etc. at present. Triangular-notch weir method onlyBe applicable to changes in flow rate Flow Observation hour, a kind of triangular-notch weir model is only applicable to the stream in certain intervalDischarge observation, and water-level fluctuation meeting causes data on flows fluctuation larger. Volumetric method be divided into water level inquire into volume andDirectly using graduated cylinder measurement volumes, there is the problem that is similar to triangular-notch weir flow measurement in the former, and water-level fluctuation causes unavoidablyFlowed fluctuation, in addition, for the observation error of low discharge far above large flow; For the latter, graduated cylinder method is surveyedAmount volume is inquired into flow, and affected by artificial subjectivity larger, and can not obtain continuous Variations in Flow Changes, dataTemporal resolution is lower.
In sum, traditional flow-measuring method, data lower to the precision of the continuous footpath of low discharge flow measurementFluctuation is large, temporal resolution is lower, makes hydrological experiment Flow Observation have larger error, is difficult to obtainChanges in flow rate detailed information accurately, has limited the understanding of people to Dynamic Characteristic of Rainfall-infiltration-runoff process.
Utility model content
The utility model provides a kind of flow measurement device, its can realize high accuracy, high time resolution andSimple and reliable flow measurement, is particularly suitable for the continuous footpath of low discharge flow measurement.
The utility model adopts following solution:
A kind of flow measurement device, comprising:
Outflow tube, for introducing current to be measured;
Header tank, the current of introducing for gathering described outflow tube;
Measurement component, for measuring the weight of described header tank and transmitting described weight; And
External equipment, for receiving described weight.
Preferably, described measurement component is electronic scale.
Preferably, described measurement component and the mode wireless connections of described external equipment communicating by letter.
Preferably, described measurement component communicates by wireless mode and described external equipment.
Preferably, described external equipment be server, PC, notebook computer at least one of them.
Preferably, described flow measurement device also comprises delivery port, and described current to be measured enter by delivery portDescribed outflow tube.
Preferably, described current to be measured are continuous runoffs.
Compared with prior art, the beneficial effects of the utility model are: 1. data precision is high, for example, can adoptElectronic scale is as measurement component, and the precision of wide range electronic scale is 1g at present, and the precision of small-range electronic scale is0.01g, if measure weight each second one time, the flow accuracy of measurement is respectively 1ml/s and 0.01ml/s, allMeet the demand of general hydrological experiment; 2. be suitable for range of flow wide, be substantially applicable to the observation of any flow,Only need to adjust the range of measurement component and the volume of header tank according to integrated flow flexible in size; 3. dataTemporal resolution is high, can data on flows of measurement per second; 4. data fluctuations is little, uses weight method flow measurement veryGood avoided the impact of water-level fluctuation on data on flows, the data on flows of acquisition is comparatively steady.
Brief description of the drawings
In conjunction with the drawings disclosure exemplary embodiment is described in more detail, of the present disclosure above-mentioned withAnd other object, Characteristics and advantages will become more obvious, wherein, in disclosure exemplary embodiment modeIn, identical reference number represents same parts conventionally.
Fig. 1 shows according to the schematic diagram of the flow measurement device of exemplary embodiment;
Fig. 2 shows according to the use flow chart of the flow measurement device of exemplary embodiment;
Fig. 3 is presented at rain making and infiltrates in experiment and apply and obtain according to the flow measurement device of exemplary embodimentThe discharge curve obtaining.
Detailed description of the invention
Preferred embodiment of the present disclosure is described below with reference to accompanying drawings in more detail. Although shown this in accompanying drawingDisclosed preferred embodiment, but should be appreciated that, can realize the disclosure with various forms and should be by not hereThe embodiment setting forth limits. On the contrary, it is in order to make the disclosure more thorough and complete that these embodiment are provided,And the scope of the present disclosure intactly can be conveyed to those skilled in the art.
Comprise according to the flow measurement device of exemplary embodiment:
Outflow tube, for introducing current to be measured;
Header tank, the current of introducing for gathering outflow tube;
Measurement component, for the weight of measuring set water tank and transmit described weight; And
External equipment, for receiving described weight.
Outflow tube is introduced current to be measured, and header tank gathers the current to be measured that outflow tube is introduced; Measurement component according toThe weight of default time cycle measuring set water tank, and this weight is transferred out; External equipment receives that this is heavyThe data of amount. In the time of practical application, current to be measured are collected by the stream device that catchments, and can estimate to treatMeasurement of discharge, selects the measurement component of corresponding range and the header tank that volume matches. The size of header tankShould meet measurement space and treat the requirement of measurement of discharge.
After external equipment receives the data of weight, can fill by manual type or by data processingPut and calculate the flow in each moment, specifically, the difference of the cumulative weight by adjacent two moment divided byThe density calculation of current to be measured obtains the flow in each moment, and computing formula is as follows:
Qi＝(Mi-Mi-1)/ρΔt
Wherein, QiFor the flow in i moment, MiFor the weight that measurement component described in the i moment records, Mi-1During for i-1Carve the weight that described measurement component records, the density that ρ is current to be measured, Δ t is data time step-length. Preferably,QiUnit be ml/s, MiAnd Mi-1Unit be g, the unit of ρ is g/cm3, the unit of Δ t is s.
As preferred version, measurement component is electronic scale. The precision of wide range electronic scale is 1g at present, in a small amountThe precision of journey electronic scale is 0.01g, if measure weight each second one time, the flow accuracy of measurement is respectively1ml/s and 0.01ml/s, all can meet the demand of general hydrological experiment.
As preferred version, measurement component is connected with external equipment by data wire, the number that measurement component is measuredAccording to being transferred to external equipment by data wire, at this moment measurement component need possess serial line interface. Or, measurement sectionPart for example, is connected in the mode that can communicate by letter wireless (bluetooth or radio frequency) with external equipment, at this moment measurement componentComprise corresponding communication chip, for example Bluetooth chip or radio frequency chip.
As preferred version, external equipment be server, PC, notebook computer at least wherein itOne.
As preferred version, also comprise delivery port according to the flow measurement device of exemplary embodiment, water to be measuredStream enters outflow tube by delivery port, then enters header tank.
As preferred version, current to be measured are continuous runoffs. Due to have precision high, be suitable for range of flow wide,The advantages such as data time resolution ratio is high, data fluctuations is little, according to the flow measurement device spy of exemplary embodimentMeasurement that Shi He low discharge solid stream of water.
Fig. 2 shows according to the use flow chart of the flow measurement device of exemplary embodiment, and it comprises following stepRapid:
Introduce current to be measured;
Gather the current that outflow tube is introduced;
The weight of measuring set water tank is also transmitted described weight; And
Receive described weight.
After receiving described weight, can calculate each by manual type or by data processing equipmentThe flow in moment, specifically, the difference of the cumulative weight by adjacent two moment is divided by current to be measuredDensity calculation obtains the flow in each moment, and computing formula is as follows:
Qi＝(Mi-Mi-1)/ρΔt
Wherein, QiFor the flow in i moment, MiFor the weight that measurement component described in the i moment records, Mi-1During for i-1Carve the weight that described measurement component records, the density that ρ is current to be measured, Δ t is data time step-length. Preferably, QiUnit be ml/s, MiAnd Mi-1Unit be g, the unit of ρ is g/cm3, the unit of Δ t is s.
In the time that application is carried out flow measurement according to the flow measurement device of exemplary embodiment, should be noted that following 2 points:
1. the cardinal principle of this device is to obtain weight data, and is converted into fluid volume and obtains flow numberAccording to, the density of therefore obtaining current to be measured is the prerequisite that obtains accurate data on flows. Be applied to hydrological experimentWhen footpath flow measurement, the content of impurity in runoff (pollutant, silt etc.) is less, can on the impact of densityIgnore, therefore the density of runoff equals the density (1cm of water3/ s). In particular cases (research Contaminants Transport,The soil erosion etc.) hydrological experiment in, the density of current to be measured is not equal to the density of water, therefore needs in advanceCarry out the work of density calibration.
There is impact to the weighing results of measurement component in the kinetic energy that 2. flows into the current in header tank, but for connectingContinuous current, this impact is comparatively constant, therefore in the time of the difference of adjacent moment cumulative weight, has balanced outThe impact of kinetic energy on final flow rate data.
Pass through to weigh the cumulative weight of each moment net flow according to the flow measurement device of exemplary embodiment,And be converted to volume, and then obtain the flow in each moment. Compared with prior art, of the present disclosure have a beneficial effectFruit is:
1. data precision is high. For example adopt electronic scale as measurement component, at present the precision of wide range electronic scaleFor 1g, the precision of small-range electronic scale is 0.01g, if measure weight each second one time, the flow essence of measurementDegree is respectively 1ml/s and 0.01ml/s, all can meet the demand of general hydrological experiment;
2. be suitable for range of flow wide. Substantially be applicable to the observation of any flow, only need according to integrated flow sizeAdjust flexibly the range of measurement component and the volume of header tank;
3. data time resolution ratio is high. Can measure a data on flows by even shorter time per second;
4. data fluctuations is little. The impact of water-level fluctuation on data on flows, acquisition are avoided with weight method flow measurementData on flows is comparatively steady.
Application example
In experiment is infiltrated in a rain making, application measures ground according to the flow measurement device of exemplary embodimentTable runoff rate.
Fig. 1 shows according to the schematic diagram of the flow measurement device of exemplary embodiment. As shown in Figure 1, flowMeasurement mechanism comprises delivery port 1, outflow tube 2, header tank 3, electronic scale 4, data wire 5 and notebook electricityBrain 6. Rainwash flows into the header tank 3 being placed on electronic scale 4, electricity by delivery port 1 via outflow tube 2Son claims 4 weight for measuring set water tank 3 and this weight is transferred out. Electronic scale 4 is by data wire 5Be connected with notebook computer 6.
As follows according to the use procedure of the flow measurement device of exemplary embodiment:
Step 1: by outflow tube 2 introduce rain making infiltrate experiment in runoff process form rainwash;
Step 2: gather the rainwash that outflow tube 2 is introduced by header tank 3;
Step 3: the weight by electronic scale 4 with the time cycle measuring set water tank 3 of 1s, and by this weightTransfer to notebook computer 6 by data wire 5;
Step 4: notebook computer 6 receives described weight;
Step 5: the difference of the cumulative weight of notebook computer 6 based on adjacent two moment is divided by rainwashDensity calculation obtains the flow in each moment.
Because surface flow silt content is very low, footpath current density equals the density of water.
Obtain exemplary traffic graph as shown in Figure 3 by above step, wherein temporal resolution is 1s, numberLess according to fluctuation, accurately and reliably.
Technique scheme is exemplary embodiment of the present utility model, for those skilled in the art, the utility model discloses on the basis of application process and principle, be easy to make various types ofImprove or distortion, and be not limited only to the described method of the above-mentioned specific embodiment of the utility model, therefore beforeThe mode of describing is just preferred, and does not have restrictive meaning.
Claims (7)
1. a flow measurement device, is characterized in that, comprising:
Outflow tube, for introducing current to be measured;
Header tank, the current of introducing for gathering described outflow tube;
Measurement component, for measuring the weight of described header tank and transmitting described weight; And
External equipment, for receiving described weight.
2. flow measurement device according to claim 1, is characterized in that, described measurement component is electricitySon claims.
3. flow measurement device according to claim 1, is characterized in that, described measurement component passes throughData wire is connected with external equipment.
4. flow measurement device according to claim 1, is characterized in that, described measurement component and instituteState the mode wireless connections of external equipment communicating by letter.
5. flow measurement device according to claim 1, is characterized in that, described external equipment is clothesBusiness device, PC, notebook computer at least one of them.
6. flow measurement device according to claim 1, is characterized in that, also comprises delivery port, instituteState current to be measured and enter described outflow tube by delivery port.
7. flow measurement device according to claim 1, is characterized in that, described current to be measured are to connectContinuous runoff.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521108406.8U CN205246140U (en) | 2015-12-28 | 2015-12-28 | Flow rate measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521108406.8U CN205246140U (en) | 2015-12-28 | 2015-12-28 | Flow rate measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205246140U true CN205246140U (en) | 2016-05-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521108406.8U Expired - Fee Related CN205246140U (en) | 2015-12-28 | 2015-12-28 | Flow rate measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205246140U (en) |
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2015
- 2015-12-28 CN CN201521108406.8U patent/CN205246140U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160518 Termination date: 20201228 |