CN209311427U - Flammable gas alarm automatic calibrator based on image recognition - Google Patents
Flammable gas alarm automatic calibrator based on image recognition Download PDFInfo
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- CN209311427U CN209311427U CN201822065897.2U CN201822065897U CN209311427U CN 209311427 U CN209311427 U CN 209311427U CN 201822065897 U CN201822065897 U CN 201822065897U CN 209311427 U CN209311427 U CN 209311427U
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Abstract
Flammable gas alarm automatic calibrator based on image recognition, including computer, dynamic air-distributing device, calibrating gas, diluent gas, gas calibrating main line, calibrating flowmeter and camera；Two air inlets of dynamic air-distributing device are connect with the gas outlet of calibrating gas and diluent gas respectively, the gas outlet of dynamic air-distributing device is connect with the air inlet of gas calibrating main line, the gas outlet of gas calibrating main line is parallel with N gas calibrating bye-pass, be provided with one on every gas calibrating bye-pass described in calibrating flowmeter.The automatic Verification of the utility model reduces the labor intensity artificially to work, more instrument can be examined and determine simultaneously, improve the working efficiency of calibration operation, eliminate the error that artificial calibrating is introduced due to artificial origin, the show value that accredited instrument is obtained by image recognition mode improves the versatility of automatic calibrator.
Description
Technical field
The utility model belongs to gas instrument Calibration Technology field, and in particular to a kind of fuel gas based on image recognition
Alarm automatic calibrator.
Background technique
Currently, well known gas instrument calibrating mostly uses manual type, time-consuming for artificial calibrating, and human cost is high, manually
Calibrating cannot achieve extensive, mass calibrating there may be human error；Even with automation calibration equipment, because existing
Automation calibration equipment need to obtain the measured value of accredited instrument by communication mode, but the instrument of different model is logical
Believe interface disunity, communication protocol is inconsistent, and in practical verification process, there are some instrument that can not obtain its communication protocol, and
There are many instrument to have no communication function, therefore there is very big limitation using the method that communication mode obtains accredited instrument measurement value
Property, it cannot achieve generalization.
Utility model content
The utility model provides a kind of fuel gas based on image recognition to solve shortcoming in the prior art
Alarm automatic calibrator sets calibration method according to vertification regulation or operator, and computer controls multiple groups transfer
State air distributing device generates the gas of required concentration in verification process, the thief hatch of accredited instrument is passed through by pipeline, by taking the photograph
As the realtime graphic of head shooting instrument display screen, image is identified and divided in real time by the picture recognition module of computer
Analysis realizes and obtains to the measured value of accredited instrument that the final assay approval set according to vertification regulation or operator is sentenced
It is fixed to carry out automatic comparison according to the measurement index of accredited instrument, automatically generate probation redport.
In order to solve the above technical problems, the utility model adopts the following technical solution: the fuel gas based on image recognition
Alarm automatic calibrator, including computer, dynamic air-distributing device, calibrating gas, diluent gas, gas calibrating main line,
Examine and determine flowmeter and camera；
Dynamic air-distributing device tool there are two air inlet and a gas outlet, two air inlets of dynamic air-distributing device respectively with
Calibrating gas is connected with the gas outlet of diluent gas, and the air inlet of the gas outlet of dynamic air-distributing device and gas calibrating main line connects
It connects, the gas outlet of gas calibrating main line is parallel with N gas calibrating bye-pass, is provided on every gas calibrating bye-pass
Flowmeter is examined and determine for connecting accredited gas instrument in calibrating flowmeter described in one, the gas outlet of gas calibrating bye-pass
It is provided with camera N number of, N is natural number more than or equal to 1, and dynamic air-distributing device and each camera pass through communication respectively
Cable is connect with computer, and camera shoots the display interface or display dial of each accredited gas instrument.
It further include first exhaust pipeline, the gas outlet of each accredited gas instrument is connect with first exhaust pipeline.
Exhaust outlet is additionally provided on dynamic air-distributing device, the exhaust outlet of dynamic air-distributing device is connected with second exhaust pipeline.
By adopting the above technical scheme, the operating method of the utility model, comprising the following steps:
(1) calibrating gas, diluent gas are respectively connected to dynamic air-distributing device, calibrating gas uses the first of 100%LEL
Alkane gas, diluent gas use pure air or nitrogen；
(2) gas outlet of dynamic air-distributing device is connect with gas calibrating main line, is accredited the air inlet and gas of instrument
The gas outlet connection of bye-pass is determined in physical examination；
(3) accredited instrument is placed on calibrating station, camera is directed at the display interface of accredited instrument or shown
Show dial plate；
(4) the automatic Verification control software run in computer is opened, the vertification regulation of flammable gas alarm is selected, advises
Journey selects 693 flammable gas-detecting alarm device vertification regulation of JJG, selects instrument sample mode for diffusion type, clicks and starts certainly
Dynamic calibrating；
(5) operator, which clicks, starts automatic Verification, and automatic Verification controls software and controlled by the communication interface of computer
Gas required for dynamic air-distributing device, calibrating gas and/or diluent gas are examined and determine by dynamic air-distributing device configuration；
(6) start to carry out error of indication calibrating, according to vertification regulation, prepare the methane gas of 10%LEL/0.5% volume fraction
Body shoots the display interface of accredited instrument by camera, is identified by the image identification function that automatic Verification controls software
The show value of accredited instrument, and determine whether indicating value is stable together, when indicating value is stablized, records and stablize indicating value；Same side
Formula is configured methane gas, the 60%LEL/3% of 40%LEL/2% volume fraction by automatic Verification control software control automated gas divider
The methane gas of volume fraction, it is same that image is shot by camera, software is controlled by automatic Verification and identifies its indicating value, and is sentenced
Determine indicating value to stablize, records and stablize indicating value；Automatic Verification control software automatically controls dynamic air-distributing device and is passed through without first after the completion
The diluent gas of alkane；
(7) it repeats step 6 three times, respectively obtains three groups of stabilization indicating value of 10%LEL, 40%LEL, 60%LEL, automatic Verification
Control software is calculated by the following formula the index error Δ C for obtaining accredited instrument:
In formula:The arithmetic mean of instantaneous value of-instrument indicating value, C0- it is passed through the distribution concentration value of accredited instrument, R-instrument is full
Range；
(8) after completing step (7), start to carry out the calibrating of instrument repeatability, be matched by automatic Verification control software control dynamic
Device of air configures the methane gas calibrating gas of 40%LE/2% volume fraction, is passed through flammable gas alarm, is clapped by camera
The display interface for taking the photograph flammable gas alarm, is converted into digital value by image recognition, controls software by automatic Verification
After determining that its indicating value is stablized, its stable indicating value is recorded, calibrating gas is then removed, is passed through zero gas；
(9) it repeats step (8) six times, obtains 6 groups of stable indicating values, automatic Verification controls software automatically by following formula meter
The relative standard deviation for the single measurement for obtaining instrument is calculated as repeatability:
In formula: SrThe relative standard deviation of-single measurement,The average value of-six measurements, CiThe indicating value of-i-th；
(10) start to carry out the response time of flammable gas alarm after completing step (9), it is logical that automatic Verification controls software
It crosses after computer control dynamic air-distributing device is passed through zero gas, then is passed through the methane gas of 40%LEL/2% volume fraction, passes through
Camera shoots the display interface of flammable gas alarm, obtains the indicating value of flammable gas alarm by image recognition, when certainly
It after dynamic calibrating control software determines that indicating value is stablized, records that stablize indicating value be C, stops ventilation or be passed through zero gas, allow combustible gas
Body alarm indicating value is restored to zero；
(11) it is passed through the methane gas of 40%LEL again, while starting time writing function, starts timing, is risen to indicating value
When stablizing the 90% of indicating value C in step (10), stop timing, records the time；
(12) step (11) are repeated three times, three groups of time records is obtained, when automatic Verification control software calculates three groups automatically
Between average value, for automatic Verification control software response time；
(13) complete step (12) after, by automatic Verification control software automatically with 693 fuel gas of vertification regulation JJG
Assay approval index in the vertification regulation of alarm is detected to be compared, if the error of indication≤5%FS, index error is qualified,
Otherwise determine that index error is unqualified；If repeatability≤2%, repeatability is qualified, otherwise determines that repeatability is unqualified；If
Response time≤60 second, then the response time is qualified, and otherwise decision response time is unqualified；
(14) automatic Verification control software automatically generates probation redport document；
(15) automatic Verification control software display calibrating is completed, and remaining gas is from first exhaust in flammable gas alarm
Pipeline discharge, terminates an automatic Verification operation.
Camera in the utility model is used to acquire the image of accredited instrument display portion, is connected by communication cable
Computer can connect multiple cameras simultaneously, while examine and determine more instrument (flammable gas alarm).
The auxiliary device of computer includes but is not limited to display, keyboard, mouse, and computer is taken the photograph by communication cable connection
As head, for acquiring the image of accredited instrument display portion, dynamic air-distributing device is connected by communication cable, is realized to dynamic
The control of air distributing device working condition.
Dynamic air-distributing device is used to generate the gas of various concentration needed for verification process, and controls the stream of output gas
Amount；Calibrating gas and diluent gas required for verification process pass through piping connection to dynamic air-distributing device.Its principle is to pass through
Internal mass flow controller automatically controls the ratio of calibrating gas and diluent gas, realizes output various concentration gas.
Calibrating gas and diluent gas (also referred to as zero gas) are mixed into verification process institute by dynamic air-distributing device automatically
The gas of the concentration needed provides standard substance to accredited instrument.
After flow needed for the standard substance of dynamic air-distributing device output is adjusted to calibrating by flowmeter, it is conveyed to accredited
Instrument.Extra gas flow is discharged by the second exhaust pipeline connecting with exhaust outlet on dynamic air-distributing device.
It is the application software run in computer that automatic Verification, which controls software, has setting vertification regulation or customized
Calibrating project and calibration method function；Have the function of to read camera image by Computer Communications Interface；With in image
The image identification function of the show value of accredited instrument, the image recognition of the pointer watch dial indicated value including pointer instrument；Tool
There is the function that dynamic air-distributing device is controlled by Computer Communications Interface；With according to the vertification regulation that has set or making by oneself
The calibrating project and calibration method of justice automatically control the calibrating gas of concentration required for dynamic air-distributing device generation verification process
Function；With the data recording function in verification process, and has the function of determining accredited instrument show value stability；Have
Time writing function；With with setting vertification regulation or customized calibration method in verification result whether He Ge judgement function
Energy；Have the function of automatically generating probation redport.
Accredited instrument has the function of display measured value, and display mode can be pointer watch dial, digital wash disk
Deng.
The utility model is using computer program according to verification process or the control of customized calibrating project and calibration method
It is gentle to examine and determine main line by gas for concentration sample gas needed for calibrating gas and diluent gas are mixed into calibrating by dynamic air-distributing device
The sampling sites that bye-pass is delivered to accredited instrument are determined in physical examination, and acquire the display figure of accredited instrument by camera simultaneously
Picture realized by image recognition algorithm accredited instrument showing that image is converted to measured value, by with verification process or make by oneself
Qualification determination in adopted calibrating project and calibration method is according to automatic comparison is carried out, according to the vertification regulation realization error of indication, again
Renaturation, null offset, span drift, the automatic calculating of response time, and a set of instrument for generating probation redport document is examined automatically
Determine device.Computer can connect multiple cameras and Duo Tai is accredited instrument and realizes while examining and determine more instrument.
In conclusion the automatic Verification of the utility model reduces the labor intensity artificially to work, more can be examined and determine simultaneously
Instrument improves the working efficiency of calibration operation, reduces the cost of labor of calibrating, eliminates artificial calibrating due to artificial origin
The error of introducing obtains the show value of accredited instrument by image recognition mode, solves some accredited instrument and does not lead to
Believe interface or cannot achieve automatic Verification the case where its communication protocol can not be obtained, without the instrument customization for different communication protocol
The adaptation of development agreement improves the versatility of automatic calibrator by the application of image recognition mode.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Specific embodiment
As shown in Figure 1, the flammable gas alarm automatic calibrator based on image recognition of the utility model, including meter
Calculation machine 1, dynamic air-distributing device 2, calibrating gas 3, diluent gas 4, gas calibrating main line 5, calibrating flowmeter 6 and camera 7；
There are two air inlet and a gas outlet, two air inlets of dynamic air-distributing device 2 to distinguish for the tool of dynamic air-distributing device 2
Connect with the gas outlet of calibrating gas 3 and diluent gas 4, the gas outlet of dynamic air-distributing device 2 and gas calibrating main line 5 into
Port connection, the gas outlet of gas calibrating main line 5 are parallel with N gas calibrating bye-pass 8, and every gas examines and determine bye-pass 8
On be provided with one described in calibrating flowmeter 6, the gas outlet of gas calibrating bye-pass 8 is for connecting accredited gas instrument
(flammable gas alarm 9) examines and determine flowmeter 6 and camera 7 and is provided with N number of, and N is the natural number more than or equal to 1, computer
Automatic Verification software built in 1, dynamic air-distributing device 2 and each camera 7 are connect by communication cable with computer 1 respectively, are taken the photograph
As first 7 pairs each display interfaces for being accredited gas instrument or display dial are shot.
The utility model further includes first exhaust pipeline 10, and the gas outlet of each accredited gas instrument is and first exhaust
Pipeline 10 connects.
Exhaust outlet is additionally provided on dynamic air-distributing device 2, the exhaust outlet of dynamic air-distributing device 2 is connected with second exhaust pipeline
11。
It is important to note that: computer 1, dynamic air-distributing device 2, the calibrating flowmeter being related in the utility model
6 and camera 7 be known hardware, the different known software of different hardware internals, automatic Verification especially built in computer 1
Software is also existing conventional techniques.Each hardware server, which runs the existing software built in it, can be realized respective function.This reality
With hardware device and its mutual connection relationship bring that novel function is by selecting, do not need to carry out process control
On improvement, do not need to design new software.
The operating method of flammable gas alarm automatic calibrator based on image recognition, includes the following steps,
(1) calibrating gas 3, diluent gas 4 are respectively connected to dynamic air-distributing device 2, calibrating gas 3 uses 100%LEL
Methane gas, diluent gas 4 use pure air or nitrogen；
(2) gas outlet of dynamic air-distributing device 2 and gas calibrating main line 5 are connect, be accredited the air inlet of instrument with
Gas examines and determine the gas outlet connection of bye-pass 8；
(3) accredited instrument is placed on calibrating station, camera 7 is directed at the display interface of accredited instrument or shown
Show dial plate；
(4) the automatic Verification control software run in computer 1 is opened, the vertification regulation of flammable gas alarm 9 is selected,
Regulation selects 693 flammable gas-detecting alarm device vertification regulation of JJG, selects instrument sample mode for diffusion type, click starts
Automatic Verification；
(5) operator, which clicks, starts automatic Verification, and automatic Verification controls software and controlled by the communication interface of computer 1
Gas required for dynamic air-distributing device 2, calibrating gas 3 and/or diluent gas 4 are examined and determine by the configuration of dynamic air-distributing device 2；
(6) start to carry out error of indication calibrating, according to vertification regulation, prepare the methane gas of 10%LEL/0.5% volume fraction
Body shoots the display interface of accredited instrument by camera 7, is identified by the image identification function that automatic Verification controls software
The show value of accredited instrument, and determine whether indicating value is stable together, when indicating value is stablized, records and stablize indicating value；Same side
Formula is configured methane gas, the 60%LEL/3% of 40%LEL/2% volume fraction by automatic Verification control software control automated gas divider
The methane gas of volume fraction equally shoots image by camera 7, controls software by automatic Verification and identifies its indicating value, and
Determine that indicating value is stablized, records and stablize indicating value；Automatic Verification control software automatic control dynamic air-distributing device 2, which is passed through, after the completion is free of
The diluent gas 4 of methane；
(7) it repeats step 6 three times, respectively obtains three groups of stabilization indicating value of 10%LEL, 40%LEL, 60%LEL, automatic Verification
Control software is calculated by the following formula the index error Δ C for obtaining accredited instrument:
In formula:The arithmetic mean of instantaneous value of-instrument indicating value, C0- it is passed through the distribution concentration value of accredited instrument, R-instrument is full
Range；
(8) after completing step (7), start to carry out the calibrating of instrument repeatability, be matched by automatic Verification control software control dynamic
Device of air 2 configures the methane gas calibrating gas 3 of 40%LE/2% volume fraction, is passed through flammable gas alarm 9, passes through camera shooting
The display interface of first 7 shooting flammable gas alarm 9, is converted into digital value by image recognition, passes through automatic Verification control
After software processed determines that its indicating value is stablized, its stable indicating value is recorded, calibrating gas 3 is then removed, is passed through zero gas；
(9) it repeats step (8) six times, obtains 6 groups of stable indicating values, automatic Verification controls software automatically by following formula meter
The relative standard deviation for the single measurement for obtaining instrument is calculated as repeatability:
In formula: SrThe relative standard deviation of-single measurement,The average value of-six measurements, CiThe indicating value of-i-th；
(10) start to carry out the response time of flammable gas alarm 9 after completing step (9), it is logical that automatic Verification controls software
It crosses computer 1 to control after dynamic air-distributing device 2 is passed through zero gas, then is passed through the methane gas of 40%LEL/2% volume fraction, lead to
The display interface that camera 7 shoots flammable gas alarm 9 is crossed, the indicating value of flammable gas alarm 9 is obtained by image recognition,
After automatic Verification control software determines that indicating value is stablized, recording stable indicating value is C, stops ventilation or is passed through zero gas, allowing can
Combustion 9 indicating value of gas alarm is restored to zero；
(11) it is passed through the methane gas of 40%LEL again, while starting time writing function, starts timing, is risen to indicating value
When stablizing the 90% of indicating value C in step (10), stop timing, records the time；
(12) step (11) are repeated three times, three groups of time records is obtained, when automatic Verification control software calculates three groups automatically
Between average value, for automatic Verification control software response time；
(13) complete step (12) after, by automatic Verification control software automatically with 693 fuel gas of vertification regulation JJG
Assay approval index in the vertification regulation of alarm is detected to be compared, if the error of indication≤5%FS, index error is qualified,
Otherwise determine that index error is unqualified；If repeatability≤2%, repeatability is qualified, otherwise determines that repeatability is unqualified；If
Response time≤60 second, then the response time is qualified, and otherwise decision response time is unqualified；
(14) automatic Verification control software automatically generates probation redport document；
(15) automatic Verification control software display calibrating is completed, and remaining gas is from first row in flammable gas alarm 9
Air pipe 10 is discharged, and terminates an automatic Verification operation.
The present embodiment not makes any form of restriction the shape of the utility model, material, structure etc., all foundations
The technical essence of the utility model any simple modification, equivalent change and modification to the above embodiments, belong to this reality
With the protection scope of new technique scheme.
Claims (3)
1. the flammable gas alarm automatic calibrator based on image recognition, it is characterised in that: including computer, dynamic air-distributing
Device, calibrating gas, diluent gas, gas calibrating main line, calibrating flowmeter and camera；
Dynamic air-distributing device tool there are two air inlet and a gas outlet, two air inlets of dynamic air-distributing device respectively with standard
Gas is connected with the gas outlet of diluent gas, and the gas outlet of dynamic air-distributing device is connect with the air inlet of gas calibrating main line,
The gas outlet of gas calibrating main line is parallel with N gas calibrating bye-pass, is provided with one on every gas calibrating bye-pass
A calibrating flowmeter, the gas outlet of gas calibrating bye-pass for connecting accredited gas instrument, calibrating flowmeter and
Camera is provided with N number of, and N is natural number more than or equal to 1, and dynamic air-distributing device and each camera pass through communication electricity respectively
Cable is connect with computer, and camera shoots the display interface or display dial of each accredited gas instrument.
2. the flammable gas alarm automatic calibrator according to claim 1 based on image recognition, it is characterised in that:
It further include first exhaust pipeline, the gas outlet of each accredited gas instrument is connect with first exhaust pipeline.
3. the flammable gas alarm automatic calibrator according to claim 1 based on image recognition, it is characterised in that:
Exhaust outlet is additionally provided on dynamic air-distributing device, the exhaust outlet of dynamic air-distributing device is connected with second exhaust pipeline.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822065897.2U CN209311427U (en) | 2018-12-10 | 2018-12-10 | Flammable gas alarm automatic calibrator based on image recognition |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822065897.2U CN209311427U (en) | 2018-12-10 | 2018-12-10 | Flammable gas alarm automatic calibrator based on image recognition |
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| Publication Number | Publication Date |
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| CN209311427U true CN209311427U (en) | 2019-08-27 |
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| CN201822065897.2U Active CN209311427U (en) | 2018-12-10 | 2018-12-10 | Flammable gas alarm automatic calibrator based on image recognition |
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