CN101865709A - Method and device for detecting output gas flow of gas storage tank - Google Patents
Method and device for detecting output gas flow of gas storage tank Download PDFInfo
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- CN101865709A CN101865709A CN200910082394A CN200910082394A CN101865709A CN 101865709 A CN101865709 A CN 101865709A CN 200910082394 A CN200910082394 A CN 200910082394A CN 200910082394 A CN200910082394 A CN 200910082394A CN 101865709 A CN101865709 A CN 101865709A
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Abstract
The invention provides a method and a device for detecting the output gas flow of a gas storage tank, wherein the method comprises the following steps of: measuring the pressure intensity of the gas storage tank at intervals of preset time; computing to obtain the gas flow according to the pressure intensity, the preset time and the volume of the gas storage tank; and when no input gas exists in the gas storage tank, determining the computed gas flow as the output gas flow of the gas storage tank. In the invention, the output gas flow of the gas storage tank can be obtained without using a flow sensor, thereby achieving the technical effect of lowering the cost.
Description
Technical field
The present invention relates to the gas flow detection range, in particular to a kind of detection method and device of output gas flow of gas storage tank.
Background technology
At present, come gas-holder output gas is carried out flow detection by flow sensor usually.
In realizing process of the present invention, the inventor finds that the price of the flow sensor of Chu Shouing is higher in the market, so it is higher to utilize flow sensor to carry out the cost of flow detection.
Summary of the invention
The invention provides a kind of detection method and device of output gas flow of gas storage tank, can solve and utilize flow sensor to carry out the cost technical problems of high that flow detection causes in the correlation technique.
According to an aspect of the present invention, provide a kind of detection method of output gas flow of gas storage tank, having comprised: the pressure of measuring gas-holder every the schedule time; Volume calculations according to pressure, the schedule time and gas-holder obtains gas flow; And when gas-holder does not have input gas, determine that the gas flow that calculates is the output gas flow of gas of gas-holder.
According to a further aspect in the invention, also provide a kind of pick-up unit of output gas flow of gas storage tank, having comprised: pressure transducer is used for the pressure every schedule time measurement gas-holder; Processing unit is used for obtaining gas flow according to the volume calculations of pressure, the schedule time and gas-holder; And output unit, be used for when gas-holder has input gas, the gas flow that calculates not being exported as the output gas flow of gas of gas-holder, and at gas-holder during also by air compressor input gas, with determine the gas flow that calculates add air compressor input flow rate and as the output gas flow of gas output of gas-holder.
In embodiments of the present invention, come calculated flow rate by detecting the pressure of gas-holder before and after output gas, thus overcome need in the correlation technique with flow sensor detect flow and cause expensive, and then reached the technique effect that reduces cost.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 shows the process flow diagram according to the detection method of the output gas flow of gas storage tank of the embodiment of the invention; And
Fig. 2 shows the block scheme according to the pick-up unit of the output gas flow of gas storage tank of the embodiment of the invention.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
Fig. 1 shows the process flow diagram according to the detection method of the output gas flow of gas storage tank of the embodiment of the invention.
With reference to Fig. 1, comprise according to the detection method of the output gas flow of gas storage tank of the embodiment of the invention:
Step S102 is every the pressure of schedule time measurement gas-holder;
Step S104 obtains gas flow according to the volume calculations of pressure, the schedule time and gas-holder;
Step S106 judges whether gas-holder has input gas, if do not import gas, and execution in step S108 then, if input gas is arranged, execution in step S110 then;
Step S108 determines that the gas flow that calculates is the output gas flow of gas of gas-holder; And
Step S110 obtains the input flow rate of air compressor, and determine the gas flow that calculates add input flow rate and as the output gas flow of gas of gas-holder.
Calculate the gas flow of the gas-holder output in this time interval according to the volume of the change of pressure in the gas-holder and gas-holder according to the detection method of the output gas flow of gas storage tank of present embodiment, because the volume of gas-holder is fixed and is known, the time interval can artificially be set, so the detection method needs according to the output gas flow of gas storage tank of present embodiment utilize lower-cost pressure transducer to detect pressure, just can calculate flow, thereby realization flow detection, so can avoid directly utilizing in the correlation technique expensive that flow sensor carries out that flow detection causes, to reach the purpose that reduces cost.
In addition, when the gas pressure intensity in the gas-holder is reduced to a certain value, the air compressor startup that is connected to gas-holder and carries gas for gas-holder.When air compressor was worked, for gas-holder, its gas volume change amount in the given time was also included within the volume that interior air compressor of the schedule time is input to the gas in the gas-holder.Because the output gas flow of gas of air compressor is normally fixing and known, so in the present embodiment, does not also need to increase other hardware cost except that pressure transducer, thereby can reach the purpose that reduces cost.
Preferably, obtain gas flow according to the volume calculations of pressure, the schedule time and gas-holder and specifically comprise: getting first constantly the pressure is first pressure, and getting the pressure constantly of second after schedule time of predetermined number is second pressure; Calculate the difference that first pressure subtracts each other second pressure; Calculated difference multiply by the product of volume of gas storage tank later on divided by the pressure of a standard atmospheric pressure; And to calculate product be gas flow in the schedule time divided by the quotient of the schedule time of predetermined number.
Because gas flow can be defined as the gas volume that flows through in the certain hour, so the difference of first pressure and second pressure promptly can obtain the volume that eluting gas is depressed at normal atmosphere in this schedule time of predetermined number divided by the product that a standard atmospheric pressure multiply by volume of gas storage tank later on, therefore, just can obtain second constantly the gas flow divided by schedule time of predetermined number again.
Preferably, the schedule time was 1 second, and predetermined number is 60.
The size of this schedule time depends on the purpose precision of precision of carrying out the pressure measurement device and the gas flow of wanting to obtain.The schedule time is more little, and is then high more to the accuracy requirement of pressure measurement device, but the precision of the gas flow that obtains is also high more.Consider for the compromise of this two aspect, select to detect per 1 second pressure in the gas-holder usually and detect less than 5% gas flow to realize error precision.Because gas pressure intensity changes less when a second, so the error of the output gas flow of gas storage tank that calculates according to the detection method of present embodiment is bigger, for reducing error, calculate back one flow value constantly so get the pressure values in two moment of being separated by 60 seconds.
Preferably, the described gas flow that calculates is a standard liters per minute flow (SLPM).
For obtaining the flow value of normal flow unit, the quotient that obtains is scaled with the unit of being upgraded to, and with the unit conversion of the schedule time for minute being unit, thereby make that the unit of this quotient is the standard unit of flow, i.e. L/min.So, can avoid the use traffic sensor to measure flow according to the detection method of the output gas flow of gas storage tank of present embodiment, to reach the purpose that reduces cost.
Preferably, from initial time, all carry out above-mentioned detection method constantly for each.Can access each flow value constantly that is detected like this, finally reach the technique effect that uses pressure transducer to detect flow.
For example, known volume of gas storage tank is 10L, it was 1 second that the schedule time is set, predetermined number is 2, and the pressure of a standard atmospheric pressure is 0.1MPa, and the pressure in the gas-holder of supposing to record in the time of the 1st second is 0.8MPa, pressure in the gas-holder that records in the time of the 2nd second is 0.71MPa, the pressure that records in the time of the 3rd second is 0.6MPa, and the pressure that records in the time of the 4th second is 0.49MPa, and then the detection method of the output gas flow of gas storage tank that provides according to present embodiment can obtain:
Wherein, Q
3Gas flow when being the 3rd second, Q
4Gas flow when being the 4th second.
In a word, after the detection method of application according to the output gas flow of gas storage tank of present embodiment, can reach the purpose that detects flow value by detecting pressure, thereby can the lower pressure detection means of use cost come displacement cost higher flows sensor, with the technique effect of realizing reducing cost.
Fig. 2 shows the block scheme according to the pick-up unit of the output gas flow of gas storage tank of the embodiment of the invention.
With reference to Fig. 2, comprise according to the pick-up unit of the output gas flow of gas storage tank of the embodiment of the invention: pressure transducer 202 is used for measuring every the schedule time pressure of described gas-holder; Processing unit 204 is used for obtaining gas flow according to the volume calculations of pressure, the schedule time and gas-holder; And output unit 206, be used for when gas-holder has input gas, the gas flow that calculates not being exported as the output gas flow of gas of gas-holder, and at gas-holder during also by air compressor input gas, the gas flow that calculates is added air compressor input flow rate and as the output gas flow of gas output of gas-holder.
Calculate the gas flow of the gas-holder output in this time interval according to the volume of the change of pressure in the gas-holder and gas-holder according to the pick-up unit of the output gas flow of gas storage tank of present embodiment, because the volume of gas-holder is fixed and is known, the time interval can artificially be set, so the detection method needs according to the output gas flow of gas storage tank of present embodiment utilize lower-cost pressure transducer to detect pressure, just can calculate flow, thereby realization flow detection, so can avoid directly utilizing in the correlation technique expensive that flow sensor carries out that flow detection causes, to reach the purpose that reduces cost.
In addition, when the gas pressure intensity in the gas-holder is reduced to a certain value, the air compressor startup that is connected to gas-holder and carries gas for gas-holder.When air compressor was worked, for gas-holder, its gas volume change amount in the given time was also included within the volume that interior air compressor of the schedule time is input to the gas in the gas-holder.Because the output gas flow of gas of air compressor is normally fixing and known, so in the present embodiment, does not also need to increase other hardware cost except that pressure transducer, thereby can reach the purpose that reduces cost.
Preferably, processing unit 204 comprises: access module, and being used to get the pressure in first moment is first pressure, the pressure of getting the second moment afterwards schedule time of predetermined number is second pressure; Summation module is used to calculate the difference that first pressure subtracts each other second pressure, and exports difference to the quadrature module; And the quadrature module, be used for calculated difference and multiply by volume of gas storage tank later on divided by the pressure of a standard atmospheric pressure, again divided by the quotient of schedule time of predetermined number as the gas flow in the schedule time.
Because gas flow can be defined as the gas volume that flows through in the certain hour, so the difference of first pressure and second pressure promptly can obtain the volume that eluting gas is depressed at normal atmosphere in this schedule time of predetermined number divided by the product that the pressure of a standard atmospheric pressure multiply by volume of gas storage tank later on, therefore, just can obtain the gas flow in second moment again divided by the schedule time.
Preferably, the schedule time was 1 second, and described predetermined number is 60.
The size of this schedule time depends on the purpose precision of precision of carrying out the pressure measurement device and the gas flow of wanting to obtain.The schedule time is more little, and is then high more to the accuracy requirement of pressure measurement device, but the precision of the gas flow that obtains is also high more.Consider for the compromise of this two aspect, select to detect per 1 second pressure in the gas-holder usually and detect less than 5% gas flow to realize error precision.Because gas pressure intensity changes less when a second, so the error of the output gas flow of gas storage tank that calculates according to the detection method of present embodiment is bigger, for reducing error, calculate back one flow value constantly so get the pressure values in two moment of being separated by 60 seconds.
Preferably, the gas flow that calculates is a standard liters per minute flow (SLPM).
For obtaining the flow value of normal flow unit, the quotient that obtains is scaled with the unit of being upgraded to, and with the unit conversion of the schedule time for minute being unit, thereby make that the unit of this quotient is the standard unit of flow, i.e. L/min.So, can avoid the use traffic sensor to measure flow according to the detection method of the output gas flow of gas storage tank of present embodiment, to reach the purpose that reduces cost.
In a word, after the pick-up unit of application according to the output gas flow of gas storage tank of present embodiment, can reach the purpose that detects flow value by the pressure change that detects gas-holder, thereby can come displacement cost higher flows sensor by the lower pressure transducer of use cost, with the technique effect of realizing reducing cost.
From above description, as can be seen, the above embodiments of the present invention come the gas-holder pressure that the pressure change is measured and basis measures is in the given time calculated the gas flow of gas-holder output by using pressure transducer, and then avoid the use traffic sensor to reach the technique effect that reduces cost.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the memory storage and carry out by calculation element, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.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 (10)
1. the detection method of an output gas flow of gas storage tank is characterized in that, comprising:
Measure the pressure of described gas-holder every the schedule time;
Volume calculations according to described pressure, the described schedule time and described gas-holder obtains gas flow; And
When described gas-holder does not have input gas, determine that the described gas flow that calculates is the output gas flow of gas of described gas-holder.
2. detection method according to claim 1 is characterized in that, obtains gas flow according to the volume calculations of described pressure, the described schedule time and described gas-holder and specifically comprises:
The described pressure of getting for first moment is first pressure, and the described pressure of getting the second moment afterwards described schedule time of predetermined number is second pressure;
Calculate the difference that described first pressure subtracts each other described second pressure;
Calculate described difference multiply by described volume of gas storage tank later on divided by a standard atmospheric pressure product; And
Calculating described product is described second constantly the gas flow divided by the quotient of the described schedule time of described predetermined number.
3. detection method according to claim 2 is characterized in that, described gas-holder also by air compressor input gas, also comprises:
Obtain the input flow rate of described air compressor;
That the described gas flow that determine to calculate adds the above input flow rate and be the output gas flow of gas of described gas-holder.
4. according to claim 2 or 3 described detection methods, it is characterized in that the described schedule time was 1 second, described predetermined number is 60.
5. detection method according to claim 4 is characterized in that, the described gas flow that calculates is a standard liters per minute flow (SLPM).
6. according to claim 2 or 3 described detection methods, it is characterized in that,, all carry out described detection method constantly for each from initial time.
7. the pick-up unit of an output gas flow of gas storage tank is characterized in that, comprising:
Pressure transducer is used for measuring every the schedule time pressure of described gas-holder;
Processing unit is used for obtaining gas flow according to the volume calculations of described pressure, the described schedule time and described gas-holder; And
Output unit, the described gas flow that is used for will calculating when described gas-holder does not have input gas is exported as the output gas flow of gas of described gas-holder, and at described gas-holder during also by air compressor input gas, the described gas flow that calculates is added the above air compressor input flow rate and as the output gas flow of gas output of described gas-holder.
8. pick-up unit according to claim 7 is characterized in that, described processing unit comprises:
Access module, being used to get the described pressure in first moment is first pressure, the described pressure of getting the second moment afterwards described schedule time of predetermined number is second pressure;
Summation module is used to calculate the difference that described first pressure subtracts each other described second pressure, and exports described difference to the quadrature module; And
Described quadrature module is used to calculate described difference and multiply by volume of gas storage tank later on divided by a standard atmospheric pressure, again divided by the quotient of described schedule time of described predetermined number as described second constantly the gas flow.
9. pick-up unit according to claim 8 is characterized in that, the described schedule time was 1 second, and described predetermined number is 60.
10. pick-up unit according to claim 9 is characterized in that, the described gas flow that calculates is a standard liters per minute flow (SLPM).
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910082394A CN101865709A (en) | 2009-04-15 | 2009-04-15 | Method and device for detecting output gas flow of gas storage tank |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910082394A CN101865709A (en) | 2009-04-15 | 2009-04-15 | Method and device for detecting output gas flow of gas storage tank |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108870078A (en) * | 2018-08-22 | 2018-11-23 | 江苏核电有限公司 | A kind of generator hydrogen dryer pneumatic operated valve control compressed air source unit and its control method |
| CN110630901A (en) * | 2019-08-20 | 2019-12-31 | 青岛精安医疗科技有限责任公司 | Method and device for detecting output gas flow of gas storage tank |
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| CN1266179A (en) * | 2000-04-12 | 2000-09-13 | 姜家玉 | Method and equipment for measuring and adjusting the speed of liquid flowing in and out sealed container |
| CN101395453A (en) * | 2006-03-07 | 2009-03-25 | 喜开理株式会社 | Gas flow rate verification unit |
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2009
- 2009-04-15 CN CN200910082394A patent/CN101865709A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1266179A (en) * | 2000-04-12 | 2000-09-13 | 姜家玉 | Method and equipment for measuring and adjusting the speed of liquid flowing in and out sealed container |
| CN101395453A (en) * | 2006-03-07 | 2009-03-25 | 喜开理株式会社 | Gas flow rate verification unit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108870078A (en) * | 2018-08-22 | 2018-11-23 | 江苏核电有限公司 | A kind of generator hydrogen dryer pneumatic operated valve control compressed air source unit and its control method |
| CN110630901A (en) * | 2019-08-20 | 2019-12-31 | 青岛精安医疗科技有限责任公司 | Method and device for detecting output gas flow of gas storage tank |
| CN110630901B (en) * | 2019-08-20 | 2021-06-29 | 青岛精安医疗科技有限责任公司 | Method and device for detecting output gas flow of gas storage tank |
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