CN115608249B - Automatic gas distribution system based on multi-component demand analysis - Google Patents

Automatic gas distribution system based on multi-component demand analysis Download PDF

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CN115608249B
CN115608249B CN202211598143.8A CN202211598143A CN115608249B CN 115608249 B CN115608249 B CN 115608249B CN 202211598143 A CN202211598143 A CN 202211598143A CN 115608249 B CN115608249 B CN 115608249B
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朱小襄
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Nanjing Xihequan Instrument Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/80—Forming a predetermined ratio of the substances to be mixed
    • B01F35/83—Forming a predetermined ratio of the substances to be mixed by controlling the ratio of two or more flows, e.g. using flow sensing or flow controlling devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/10—Mixing gases with gases
    • B01F23/19—Mixing systems, i.e. flow charts or diagrams; Arrangements, e.g. comprising controlling means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/21—Measuring
    • B01F35/211—Measuring of the operational parameters
    • B01F35/2113—Pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
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    • B01F35/2132—Concentration, pH, pOH, p(ION) or oxygen-demand
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/22—Control or regulation
    • B01F35/2201—Control or regulation characterised by the type of control technique used
    • B01F35/2202—Controlling the mixing process by feed-back, i.e. a measured parameter of the mixture is measured, compared with the set-value and the feed values are corrected
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/80—Forming a predetermined ratio of the substances to be mixed
    • B01F35/83—Forming a predetermined ratio of the substances to be mixed by controlling the ratio of two or more flows, e.g. using flow sensing or flow controlling devices
    • B01F35/832—Flow control by weighing
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/007—Arrangements to check the analyser
    • G01N33/0072—Arrangements to check the analyser by generating a test gas

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Abstract

The invention provides an automatic gas distribution system based on multi-component demand analysis, which relates to the technical field of multi-component gas distribution, and comprises a supply module, a mass flow control module, a proportioning and mixing module and an updating and regulating module; the supply module comprises a supply storage unit, a storage parameter detection unit and a pre-proportioning unit, the supply storage unit comprises a plurality of types of gas storages, and the storage parameter detection unit is used for detecting the storage amount and the pressure intensity of the plurality of types of gas storages; the gas proportioning unit is provided with a pre-proportioning analysis strategy, and the gas proportioning device can be used for analyzing the proportioning requirements and the storage states of gases with different components, and adjusting the output mode of gas proportioning in a targeted manner so as to solve the problem that the proportioning has errors due to the insufficient pertinence of the proportioning output setting mode of the existing gas distribution system.

Description

Automatic gas distribution system based on multi-component demand analysis
Technical Field
The invention belongs to the technical field of multi-component gas distribution, and particularly relates to an automatic gas distribution system based on multi-component demand analysis.
Background
In the field of gas analysis instruments, standard gas is an important means for calibrating and calibrating measurement results of gas analysis instruments, and when the instruments are calibrated or calibrated, gas with different concentrations is needed, but the quantity of the standard gas with each concentration needed at the time is not large, but the standard gas with corresponding concentration needs to be prepared for calibration points. If the standard gas produced by a professional manufacturer is purchased for each calibration point, the cost is high, the method is not economical, and the method also causes great waste. The automatic gas distribution device can carry out gas proportioning with different concentration proportions according to requirements.
In the existing automatic gas distribution device, when multi-component gas is proportioned, the demand amounts of different components of gas are different, a plurality of types of gas to be proportioned are separately stored, and due to the difference in demand amounts, after multiple times of proportioning, the residual amounts of gas in different types of gas storage containers are also different, which causes the difference in stored pressure. When the gas is output at low pressure, the output rate is reduced, and gas is easy to remain in the gas distribution pipeline, so that the gas distribution system which is used for pertinently setting the output mode according to the gas storage condition of different components is lacked to solve the existing problems.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an automatic gas distribution system based on multi-component demand analysis, which can adjust the output mode of gas proportioning in a targeted manner by analyzing the proportioning demands and storage states of gases with different components so as to solve the problem of proportioning errors caused by the insufficient pertinence of the proportioning output setting mode of the conventional gas distribution system.
In order to achieve the purpose, the invention is realized by the following technical scheme: an automatic gas distribution system based on multi-component demand analysis comprises a supply module, a mass flow control module, a proportioning mixing module and an updating regulation module;
the supply module comprises a supply storage unit, a storage parameter detection unit and a pre-proportioning unit, wherein the supply storage unit comprises a plurality of types of gas storages, and the storage parameter detection unit is used for detecting the storage quantity and the pressure intensity of the plurality of types of gas storages; the pre-matching unit is configured with a pre-matching analysis strategy, and the pre-matching analysis strategy comprises the following steps: comprehensively analyzing the proportioning information and the storage capacity and pressure detection information of the gas storage to obtain a pre-proportioning parameter, wherein the pre-proportioning parameter comprises pre-proportioning quality and a pre-proportioning enhancement pressure value;
the mass flow control module comprises a mass flow control unit and a proportioning pressure auxiliary unit, and the mass flow control unit is used for outputting corresponding types of gas according to the pre-proportioning flow; the proportioning pressure auxiliary unit is used for carrying out auxiliary pressure enhancement according to a pre-proportioning enhancement pressure value;
the proportioning and mixing module comprises a mixing unit and a mixing parameter detection unit, the mixing unit is used for mixing a plurality of input gases, and the mixing parameter detection unit is used for detecting the concentration of the mixed gases;
the updating regulation and control module comprises a supply regulation unit and a distribution detection unit, wherein the supply regulation unit is used for comparing detection information of the mixed gas concentration to obtain a comparison difference value, and a regulation parameter is obtained based on the comparison difference value; the distribution detection unit comprises a distribution detection sensor, the distribution detection sensor is used for detecting the concentration of gas outside the distribution pipeline, the distribution detection unit is used for analyzing the adjustment result of the supply adjustment unit to obtain a distribution detection signal, and the distribution detection sensor is controlled to operate according to the distribution detection signal.
Further, the supply module further comprises a storage parameter database, wherein the mass of the gas storage when the gas storage is not used for storing gas is stored in the storage parameter database, and the storage parameter database is set as the no-load storage mass; the storage parameter detection unit comprises a plurality of groups of detection subunits, each group of detection subunits comprises a pressure sensor and a quality detection sensor, the storage parameter detection unit is configured with a storage parameter detection strategy, and the storage parameter detection strategy comprises: acquiring the internal pressure of the gas storage device through a pressure sensor, and setting the internal pressure as a storage pressure; and acquiring the total mass of the gas storage through the mass detection sensor, setting the total mass as the total storage mass, and subtracting the no-load storage mass from the total storage mass to obtain the gas storage mass.
Further, the pre-matching analysis strategy further comprises: calculating the gas proportioning concentration and the total proportioning mass in the proportioning information through a gas proportioning calculation formula to obtain the pre-proportioning mass; the gas proportioning calculation formula is configured as follows:
Figure 255960DEST_PATH_IMAGE001
(ii) a Wherein, gyp is the pre-proportioning mass, nqp is the gas proportioning concentration, and Gzp is the total proportioning mass;
calculating the pre-proportioning ratio mass, the storage pressure and the gas storage mass through a proportioning pressure calculation formula to obtain a pre-proportioning ratio enhanced pressure value; the proportional pressure calculation formula is configured to:
Figure 462951DEST_PATH_IMAGE002
(ii) a The method comprises the following steps that Pyz is a pre-prepared ratio enhanced pressure value, gbz is standard storage quality of a gas storage device, gqc is gas storage quality, k1 is a conversion coefficient of the storage quality and the pressure, k1 is a constant, the value of k1 is larger than zero, pbz is standard storage pressure of the gas storage device, and Pcc is storage pressure;
and outputting the mass of the pre-proportioning ratio and the enhanced pressure value of the pre-proportioning ratio to a mass flow control module.
Further, the proportional pressure auxiliary unit includes a gas supplement connector, the gas supplement connector is connected to a gas storage, the gas supplement connector is used for being connected to an external gas supplement device, the mass flow control module is configured with a mass flow control strategy, and the mass flow control strategy includes: outputting gas with the mass in a preset ratio through a mass flow control unit;
the gas storage device is connected with an external gas supplementing device through the gas supplementing connector, a gas storage body is stored in the gas storage device through the gas supplementing connector, the storage pressure of the gas storage device is obtained in real time through the storage parameter detection unit, and when the storage pressure is larger than or equal to a first storage pressure threshold value, gas transmission into the gas storage device is stopped.
Further, the mixing unit comprises a gas mixing device and a mixing gas chamber, the mixing gas chamber is connected with the gas storage through a distribution pipeline, the gas mixing device is arranged in the mixed gas, and the gas mixing device is used for mixing the gas input into the mixing gas chamber;
the mixed parameter detection unit comprises a plurality of gas concentration sensors, the gas concentration sensors respectively correspond to a plurality of types of gases, and the gas concentration sensors are respectively used for detecting the concentrations of the plurality of types of gases;
the mixed parameter detection unit is configured with a mixed parameter detection strategy, and the mixed parameter detection strategy comprises: the method comprises the steps of obtaining the types of gases to be proportioned in a gas mixing chamber, starting a corresponding gas concentration sensor according to the types of the proportioned gases, obtaining the concentration of the mixed gases through the gas concentration sensor, and setting the concentration as the mixed concentration.
Further, the supply adjustment unit is configured with a supply adjustment policy, the supply adjustment policy including: calculating the mixed concentration and the gas proportioning concentration through a proportioning difference calculation formula to obtain a comparison difference; the proportioning difference calculation formula is configured as follows:
Figure 45242DEST_PATH_IMAGE003
(ii) a Wherein Nbd is a comparison difference value, and Nhh is a mixed concentration;
when the comparison difference is smaller than or equal to the first comparison threshold, outputting a ratio normal signal;
when the comparison difference is greater than the first comparison threshold and less than or equal to the second comparison threshold, outputting a ratio adjusting signal;
when the comparison difference is greater than or equal to the second comparison threshold, outputting a distribution detection signal;
when a proportioning normal signal is received, the parameters are not adjusted; when a proportioning adjustment signal or a distribution detection signal is received, calculating the comparison difference value through a proportioning pressure enhancement calculation formula to obtain a proportioning pressure enhancement value; the proportional pressure enhancement calculation formula is configured to:
Figure 688582DEST_PATH_IMAGE004
(ii) a Wherein Xzq is a ratio pressure enhancement value, and alpha is an enhancement coefficient conversion ratio of the comparison difference;
when the delivery detection signal is received, the delivery detection signal is output to the delivery detection unit.
Furthermore, three groups of delivery detection sensors are arranged on the delivery pipeline, the three groups of delivery detection sensors are respectively arranged as a first delivery detection sensor, a second delivery detection sensor and a third delivery detection sensor, the first delivery detection sensor is arranged outside one end of the delivery pipeline close to the gas storage, the second delivery detection sensor is arranged outside the middle position of the delivery pipeline, and the third delivery detection sensor is arranged outside one end of the delivery pipeline close to the mixed gas chamber;
the delivery detection unit is configured with a delivery detection strategy, which includes: when a distribution detection signal is received, respectively acquiring a first distribution detection concentration value, a second distribution detection concentration value and a third distribution detection concentration value through a first distribution detection sensor, a second distribution detection sensor and a third distribution detection sensor;
and outputting a shutdown maintenance signal when the first distribution detection concentration value, the second distribution detection concentration value or the third distribution detection concentration value is greater than or equal to the first leakage concentration threshold value.
The invention has the beneficial effects that: the invention can detect the storage capacity and the pressure intensity of a plurality of types of gas storages through the storage parameter detection unit; then, the proportioning information, the storage capacity of the gas storage and the pressure intensity detection information can be comprehensively analyzed through the proportioning unit to obtain proportioning parameters, and the corresponding types of gases can be output through the mass flow control unit according to the proportioning flow; then, the pressure auxiliary enhancement can be carried out according to the pre-proportioning enhancement pressure value through the proportioning pressure auxiliary unit; the design can set corresponding output modes based on the storage states of the gas storages with different components, so that the gas output speed and the accuracy of the gas output quantity in the gas proportioning process are improved;
the gas mixing device can mix a plurality of types of input gases through the mixing unit, and can detect the concentration of the mixed gases through the mixing parameter detection unit; then, the detection information of the mixed gas concentration can be compared through the supply adjusting unit to obtain a comparison difference value, and an adjusting parameter is obtained based on the comparison difference value; the distribution detection unit can calculate and analyze the comparison difference to obtain a distribution detection signal, and the distribution detection sensor is controlled to operate according to the distribution detection signal; this design can carry out the accuracy of mixed concentration to the mist after the ratio and detect, then adjusts the parameter of ratio output based on the testing result, helps improving subsequent ratio accuracy, can in time monitor the leakage state of output process simultaneously, improves the security of gas output ratio.
Advantages of additional aspects of the invention will be set forth in part in the description of the embodiments which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
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Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a block schematic diagram of an automatic gas distribution system of the present invention;
FIG. 2 is a schematic view of the connection between the gas storage and the mixing chamber according to the present invention.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention.
The embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
Referring to fig. 1, the present invention provides an automatic gas distribution system based on multi-component demand analysis, which includes a supply module, a mass flow control module, a mixture ratio mixing module, and an update regulation module; by analyzing the proportioning requirements and storage states of gases with different components, the output mode of gas proportioning can be adjusted in a targeted manner, so that the problem that proportioning has errors due to the fact that the pertinence of the proportioning output setting mode of the existing gas distribution system is insufficient is solved.
The specific scheme is as follows: the supply module comprises a supply storage unit, a storage parameter detection unit and a pre-proportioning unit, the supply storage unit comprises a plurality of types of gas storages, and the gas storages adopt gas pressure storage tanks and can ensure that gas output ends are in a state of conveying from high pressure to low pressure.
The storage parameter detection unit is used for detecting the storage capacity and the pressure intensity of a plurality of types of gas storages; the supply module also comprises a storage parameter database, the mass of the gas storage when the gas storage is not used for storing gas is stored in the storage parameter database, and the storage parameter database is set as the no-load storage mass; the storage parameter detection unit comprises a plurality of groups of detection subunits, each group of detection subunits respectively comprises a pressure sensor and a quality detection sensor, the pressure sensor is in the form of a pressure gauge, the pressure inside the gas storage is detected through the pressure gauge, the quality detection sensor is in the form of a pressure sensor, and the pressure sensor is arranged at the bottom of the gas storage and used for detecting the quality of the gas storage; the storage parameter detection unit is configured with a storage parameter detection strategy, and the storage parameter detection strategy comprises: acquiring the internal pressure of the gas storage device through a pressure sensor, and setting the internal pressure as a storage pressure; and acquiring the total mass of the gas storage through the mass detection sensor, setting the total mass as the total storage mass, and subtracting the no-load storage mass from the total storage mass to obtain the gas storage mass.
The pre-matching unit is configured with a pre-matching analysis strategy, and the pre-matching analysis strategy comprises the following steps: comprehensively analyzing the proportioning information and the storage capacity and pressure detection information of the gas storage to obtain a pre-proportioning parameter, wherein the pre-proportioning parameter comprises pre-proportioning quality and a pre-proportioning enhancement pressure value; the pre-match analysis strategy further comprises: calculating the gas proportioning concentration and the total proportioning mass in the proportioning information through a gas proportioning calculation formula to obtain the pre-proportioning mass; the total mass ratio is the total mass of the mixed gas after the mixed gas is mixed in the ratio; the gas proportioning calculation formula is configured as follows:
Figure 381731DEST_PATH_IMAGE001
(ii) a Wherein, gyp is the pre-proportioning mass, nqp is the gas proportioning concentration, and Gzp is the total proportioning mass;
calculating the pre-proportioning ratio mass, the storage pressure and the gas storage mass through a proportioning pressure calculation formula to obtain a pre-proportioning ratio enhanced pressure value; the proportional pressure calculation formula is configured as:
Figure 115332DEST_PATH_IMAGE002
(ii) a The method comprises the following steps that Pyz is a pre-prepared ratio enhanced pressure value, gbz is standard storage quality of a gas storage device, gqc is gas storage quality, k1 is a conversion coefficient of the storage quality and the pressure, k1 is a constant, the value of k1 is larger than zero, pbz is standard storage pressure of the gas storage device, and Pcc is storage pressure; in a specific implementation process, a standard storage mass and a standard storage pressure are set according to the storage capacity of the gas storage, for example, the standard storage mass of the gas storage is 100kg, the standard storage pressure is 0.5mpa, and k1 is set to be 0.005;
and outputting the mass of the pre-proportioning ratio and the enhanced pressure value of the pre-proportioning ratio to a mass flow control module.
The mass flow control module comprises a mass flow control unit and a proportioning pressure auxiliary unit, wherein the mass flow control unit is used for outputting corresponding types of gas according to the pre-proportioning flow; the proportioning pressure auxiliary unit is used for carrying out auxiliary pressure enhancement according to the pre-proportioning enhancement pressure value; the proportioning pressure auxiliary unit comprises a gas supplementing connector, the gas supplementing connector is connected with a gas storage device, the gas supplementing connector is used for being connected with an external gas supplementing device, the mass flow control module is provided with a mass flow control strategy, and the mass flow control strategy comprises: outputting gas with the mass of the pre-prepared ratio through a mass flow control unit; the mass flow control unit controls gas output through the mass flow controller;
the gas storage device is connected with an external gas supplementing device through a gas supplementing connector, the external gas supplementing device can be a gas supplementing tank, the gas supplementing tank is connected with a gas transmission pump, gas transmission is carried out through the gas transmission pump, pressurization processing can be carried out through the gas transmission pump, gas storage bodies are stored in the gas storage device through the gas supplementing connector, the storage pressure of the gas storage device is obtained in real time through a storage parameter detection unit, and when the storage pressure is larger than or equal to a first storage pressure threshold value, gas transmission into the gas storage device is stopped. The gas supplementing connector can be set as a one-way valve, and corresponding types of gas can be input into the gas storage through the one-way valve.
The proportioning and mixing module comprises a mixing unit and a mixing parameter detection unit, the mixing unit is used for mixing a plurality of types of input gases, the mixing unit comprises a gas mixing device and a mixing gas chamber, the mixing gas chamber is connected with a gas storage device through a distribution pipeline, the gas mixing device is arranged in the mixing gas, the gas mixing device is used for mixing the gases input into the mixing gas chamber, the gas mixing device can be arranged as a spiral stirrer, and the gases in the mixing gas chamber can be quickly mixed through the rotation of the spiral stirrer; the mixing parameter detection unit is used for detecting the concentration of the mixed gas; the mixed parameter detection unit comprises a plurality of gas concentration sensors, the gas concentration sensors correspond to a plurality of types of gas respectively, the gas concentration sensors are used for detecting the gas concentrations of the plurality of types respectively, and when the mixed parameter detection unit is specifically implemented, a gas storage device of which type is arranged corresponds to the gas concentration sensors of which type is arranged, so that the gas concentration sensors of each type can be effectively detected after being mixed.
The mixed parameter detection unit is configured with a mixed parameter detection strategy, and the mixed parameter detection strategy comprises the following steps: the method comprises the steps of obtaining the types of gases to be proportioned in a gas mixing chamber, starting a corresponding gas concentration sensor according to the types of the proportioned gases, obtaining the concentration of the mixed gases through the gas concentration sensor, and setting the concentration as the mixed concentration.
The updating regulation and control module comprises a supply regulation unit and a distribution detection unit, wherein the supply regulation unit is used for comparing the detection information of the mixed gas concentration to obtain a comparison difference value, and a regulation parameter is obtained based on the comparison difference value; the provisioning adjustment unit is configured with a provisioning adjustment policy, the provisioning adjustment policy comprising: calculating the mixed concentration and the gas proportioning concentration through a proportioning difference calculation formula to obtain a comparison difference; the proportioning difference calculation formula is configured as follows:
Figure 616327DEST_PATH_IMAGE003
(ii) a Wherein Nbd is a comparison difference value, and Nhh is a mixed concentration;
when the comparison difference is smaller than or equal to the first comparison threshold, outputting a ratio normal signal;
when the comparison difference is greater than the first comparison threshold and less than or equal to the second comparison threshold, outputting a ratio adjusting signal;
when the comparison difference is greater than or equal to the second comparison threshold, outputting a distribution detection signal; the second comparison threshold is greater than the first comparison threshold;
when a proportioning normal signal is received, the parameters are not adjusted; when a proportioning adjustment signal or a distribution detection signal is received, calculating the comparison difference value through a proportioning pressure enhancement calculation formula to obtain a proportioning pressure enhancement value; the proportional pressure enhancement calculation formula is configured as:
Figure 763274DEST_PATH_IMAGE004
(ii) a Wherein Xzq is a ratio pressure enhancement value, and alpha is an enhancement coefficient conversion ratio of the comparison difference; for example, when the comparison difference is 0.1, the ratio pressure of the two-fold comparison difference is correspondingly increased, then alpha is set to 2, after the ratio pressure enhancement value is obtained, the adjusted pressure value is obtained by adding the ratio pressure enhancement value to the ratio pressure enhancement value obtained by the pre-ratio unit, and then the gas distribution operation is carried out according to the adjusted pressure value;
when the delivery detection signal is received, the delivery detection signal is output to the delivery detection unit.
Referring to fig. 2, the distribution detection unit includes distribution detection sensors, which are correspondingly disposed according to the types of gases in the gas storage connected to the distribution pipeline, and the distribution detection sensors are different gas concentration sensors; the distribution detection sensor is used for detecting the concentration of gas outside the distribution pipeline, the distribution detection unit is used for analyzing the adjustment result supplied to the adjustment unit to obtain a distribution detection signal, and the distribution detection sensor is controlled to operate according to the distribution detection signal; the distribution pipeline is provided with three groups of distribution detection sensors which are respectively arranged as a first distribution detection sensor, a second distribution detection sensor and a third distribution detection sensor, the first distribution detection sensor is arranged outside one end of the distribution pipeline close to the gas storage, the second distribution detection sensor is arranged outside the middle position of the distribution pipeline, and the third distribution detection sensor is arranged outside one end of the distribution pipeline close to the mixed gas chamber; three groups of distribution detection sensors are arranged, so that the comprehensiveness of the distribution pipeline leakage detection can be improved;
the delivery detection unit is configured with a delivery detection strategy, and the delivery detection strategy comprises: when a distribution detection signal is received, respectively acquiring a first distribution detection concentration value, a second distribution detection concentration value and a third distribution detection concentration value through a first distribution detection sensor, a second distribution detection sensor and a third distribution detection sensor;
when the first distribution detection concentration value, the second distribution detection concentration value or the third distribution detection concentration value is greater than or equal to the first leakage concentration threshold value, a shutdown maintenance signal is output, for example, the first leakage concentration threshold value is 10%, and when the concentration of the leaked gas exceeds the first leakage concentration threshold value, shutdown maintenance is required.
The working principle is as follows: the invention can detect the storage capacity and the pressure intensity of a plurality of types of gas storages through the storage parameter detection unit, comprehensively analyze the proportioning information and the storage capacity and the pressure intensity detection information of the gas storages through the pre-proportioning unit to obtain the pre-proportioning parameter, output corresponding types of gas according to the pre-proportioning flow through the mass flow control unit, and perform pressure intensity auxiliary enhancement according to the pre-proportioning enhancement pressure intensity value through the proportioning pressure intensity auxiliary unit, thereby improving the accuracy of different types of gas in proportioning output;
the input gases can be mixed through the mixing unit, the mixed gas concentration can be detected through the mixed parameter detection unit, then the detection information of the mixed gas concentration can be compared through the supply adjustment unit to obtain a comparison difference value, an adjustment parameter is obtained based on the comparison difference value, finally the comparison difference value can be calculated and analyzed through the delivery detection unit to obtain a delivery detection signal, and the delivery detection sensor is controlled to operate according to the delivery detection signal; when the accuracy of the mixed concentration of the mixed gas after proportioning is guaranteed to be detected, the leakage state of the output process can be monitored in time, and the safety of gas output proportioning is improved.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media having computer-usable program code embodied in the medium. The storage medium may be implemented by any type of volatile or nonvolatile storage device or combination thereof, such as a Static Random Access Memory (SRAM), an Electrically Erasable Programmable Read-Only Memory (EEPROM), an Erasable Programmable Read-Only Memory (EPROM), a Programmable Read-Only Memory (PROM), an on-Read Memory (ROM), a magnetic Memory, a flash Memory, a magnetic disk, or an optical disk.
The above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (3)

1. An automatic gas distribution system based on multi-component demand analysis is characterized by comprising a supply module, a mass flow control module, a proportioning and mixing module and an updating and regulating module;
the supply module comprises a supply storage unit, a storage parameter detection unit and a pre-proportioning unit, the supply storage unit comprises a plurality of types of gas storages, and the storage parameter detection unit is used for detecting the storage amount and the pressure intensity of the plurality of types of gas storages; the pre-matching unit is configured with a pre-matching analysis strategy, and the pre-matching analysis strategy comprises the following steps: comprehensively analyzing the proportioning information and the storage capacity and pressure detection information of the gas storage to obtain a pre-proportioning ratio parameter, wherein the pre-proportioning ratio parameter comprises pre-proportioning ratio quality and a pre-proportioning ratio enhanced pressure value;
the mass flow control module comprises a mass flow control unit and a proportioning pressure auxiliary unit, and the mass flow control unit is used for outputting corresponding types of gas according to the pre-proportioning flow; the proportioning pressure auxiliary unit is used for carrying out auxiliary pressure enhancement according to a pre-proportioning enhancement pressure value;
the proportioning and mixing module comprises a mixing unit and a mixing parameter detection unit, the mixing unit is used for mixing a plurality of input gases, and the mixing parameter detection unit is used for detecting the concentration of the mixed gases;
the updating regulation and control module comprises a supply regulation unit and a distribution detection unit, wherein the supply regulation unit is used for comparing detection information of the mixed gas concentration to obtain a comparison difference value, and a regulation parameter is obtained based on the comparison difference value; the distribution detection unit comprises a distribution detection sensor, the distribution detection sensor is used for detecting the concentration of gas outside the distribution pipeline, the distribution detection unit is used for analyzing the adjustment result of the supply adjustment unit to obtain a distribution detection signal, and the distribution detection sensor is controlled to operate according to the distribution detection signal;
the supply module also comprises a storage parameter database, and the mass of the gas storage when the gas storage is not used for storing gas is stored in the storage parameter database and is set as the no-load storage mass; the storage parameter detection unit comprises a plurality of groups of detection subunits, each group of detection subunits comprises a pressure sensor and a quality detection sensor, the storage parameter detection unit is configured with a storage parameter detection strategy, and the storage parameter detection strategy comprises: acquiring the internal pressure of the gas storage device through a pressure sensor, and setting the internal pressure as a storage pressure; acquiring the total mass of the gas storage through a mass detection sensor, setting the total mass as the total storage mass, and subtracting the no-load storage mass from the total storage mass to obtain the gas storage mass;
the pre-match analysis strategy further comprises: calculating the gas proportioning concentration and the total proportioning mass in the proportioning information through a gas proportioning calculation formula to obtain a pre-proportioning mass; the gas proportioning calculation formula is configured as follows:
Figure QLYQS_1
(ii) a Wherein, gyp is the pre-proportioning mass, nqp is the gas proportioning concentration, and Gzp is the total proportioning mass;
calculating the pre-proportioning ratio mass, the storage pressure and the gas storage mass through a proportioning pressure calculation formula to obtain a pre-proportioning ratio enhanced pressure value; the proportional pressure calculation formula is configured to:
Figure QLYQS_2
(ii) a The method comprises the following steps that Pyz is a pre-prepared ratio enhanced pressure value, gbz is standard storage quality of a gas storage device, gqc is gas storage quality, k1 is a conversion coefficient of the storage quality and the pressure, k1 is a constant, the value of k1 is larger than zero, pbz is standard storage pressure of the gas storage device, and Pcc is storage pressure;
outputting the mass of the pre-proportioning ratio and the enhanced pressure value of the pre-proportioning ratio to a mass flow control module;
the proportioning pressure auxiliary unit comprises a gas supplementing connector, the gas supplementing connector is connected with a gas storage, the gas supplementing connector is used for being connected with an external gas supplementing device, the mass flow control module is provided with a mass flow control strategy, and the mass flow control strategy comprises: outputting gas with the mass in a preset ratio through a mass flow control unit;
the gas storage device is connected with an external gas supplementing device through a gas supplementing connector, a gas storage body is stored in the gas storage device through the gas supplementing connector, the storage pressure of the gas storage device is obtained in real time through a storage parameter detection unit, and when the storage pressure is larger than or equal to a first storage pressure threshold value, gas transmission into the gas storage device is stopped;
the distribution pipeline is provided with three groups of distribution detection sensors which are respectively arranged as a first distribution detection sensor, a second distribution detection sensor and a third distribution detection sensor, the first distribution detection sensor is arranged outside one end of the distribution pipeline close to the gas storage, the second distribution detection sensor is arranged outside the middle position of the distribution pipeline, and the third distribution detection sensor is arranged outside one end of the distribution pipeline close to the mixed gas chamber;
the delivery detection unit is configured with a delivery detection policy, and the delivery detection policy includes: when a distribution detection signal is received, respectively acquiring a first distribution detection concentration value, a second distribution detection concentration value and a third distribution detection concentration value through a first distribution detection sensor, a second distribution detection sensor and a third distribution detection sensor;
and outputting a shutdown maintenance signal when the first delivery detection concentration value, the second delivery detection concentration value or the third delivery detection concentration value is greater than or equal to the first leakage concentration threshold value.
2. The system of claim 1, wherein the mixing unit comprises a gas mixing device and a gas mixing chamber, the gas mixing chamber is connected with the gas storage device through a distribution pipeline, the gas mixing device is arranged inside the gas mixture, and the gas mixing device is used for mixing the gas input into the gas mixing chamber;
the mixed parameter detection unit comprises a plurality of gas concentration sensors, the gas concentration sensors respectively correspond to a plurality of types of gases, and the gas concentration sensors are respectively used for detecting the concentrations of the plurality of types of gases;
the mixed parameter detection unit is configured with a mixed parameter detection strategy, which includes: the method comprises the steps of acquiring the types of gas to be mixed in a mixed gas chamber, starting a corresponding gas concentration sensor according to the types of the mixed gas, acquiring the concentration of the mixed gas through the gas concentration sensor, and setting the concentration as the mixed concentration.
3. The system of claim 2, wherein the supply adjustment unit is configured with a supply adjustment strategy, the supply adjustment strategy comprising: calculating the mixed concentration and the gas proportioning concentration through a proportioning difference calculation formula to obtain a comparison difference; the proportioning difference calculation formula is configured as follows:
Figure QLYQS_3
(ii) a Wherein Nbd is a comparison difference value, and Nhh is a mixed concentration;
when the comparison difference is smaller than or equal to the first comparison threshold, outputting a proportion normal signal;
when the comparison difference is greater than the first comparison threshold and less than or equal to the second comparison threshold, outputting a ratio adjusting signal;
when the comparison difference is greater than or equal to the second comparison threshold, outputting a distribution detection signal;
when a proportion normal signal is received, no parameter adjustment is carried out; when a proportioning adjustment signal or a distribution detection signal is received, calculating the comparison difference value through a proportioning pressure enhancement calculation formula to obtain a proportioning pressure enhancement value; the proportional pressure boost calculation formula is configured to:
Figure QLYQS_4
(ii) a Wherein Xzq is a ratio pressure enhancement value, and alpha is an enhancement coefficient conversion ratio of the comparison difference;
when the delivery detection signal is received, the delivery detection signal is output to the delivery detection unit.
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