CN118097912A - Carbon monoxide on-line calibration device and method - Google Patents
Carbon monoxide on-line calibration device and method Download PDFInfo
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- CN118097912A CN118097912A CN202410219502.7A CN202410219502A CN118097912A CN 118097912 A CN118097912 A CN 118097912A CN 202410219502 A CN202410219502 A CN 202410219502A CN 118097912 A CN118097912 A CN 118097912A
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 215
- 229910002091 carbon monoxide Inorganic materials 0.000 title claims abstract description 215
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000001514 detection method Methods 0.000 claims abstract description 36
- 238000004891 communication Methods 0.000 claims abstract description 19
- 238000012795 verification Methods 0.000 claims abstract description 13
- 239000007789 gas Substances 0.000 claims description 325
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 45
- 229910052757 nitrogen Inorganic materials 0.000 claims description 18
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims 1
- 230000000007 visual effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000002360 preparation method Methods 0.000 description 7
- 238000012937 correction Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 238000012790 confirmation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910001021 Ferroalloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention discloses a carbon monoxide on-line calibration device and a method, wherein the device comprises the following components: the system comprises a calibration system, an air source pipe, a calibration air tank, a carbon monoxide alarm instrument and a standard air cylinder; the calibration system is connected with the carbon monoxide alarm instrument through the wireless communication module; the standard gas cylinder is connected with the calibration gas cylinder through a gas source pipe, and the gas source pipe is connected with the carbon monoxide alarm instrument through the calibration gas cylinder; the calibration system is configured to: controlling a gas valve of a standard gas cylinder to be opened, and conveying standard gas into a calibration gas cylinder through a gas source pipe; and calibrating the carbon monoxide alarm according to the detection result of the carbon monoxide alarm. The device realizes the calibration and adjustment of the output value of the carbon monoxide alarm, and simultaneously calibrates the output signal value of the carbon monoxide alarm, thereby achieving the verification of the centralized display controller of the carbon monoxide alarm and improving the calibration efficiency.
Description
Technical Field
The invention relates to the technical field of gas detection, in particular to a carbon monoxide on-line calibration device and method.
Background
A large amount of byproducts of blast furnace gas, converter gas, coke oven gas and ferroalloy gas are produced in the production process of iron and steel enterprises. The main component of various gases is carbon monoxide, and when gas leakage, namely carbon monoxide gas leakage, occurs, not only personnel poisoning accidents are easy to occur, but also group death group injury production safety accidents such as fire and explosion can be caused. Therefore, the fixed carbon monoxide alarm is arranged on the production site, and the portable carbon monoxide alarm carried by the gas inlet region of the worker is an important safety measure for preventing related accidents. However, the on-site fixed alarm needs to be detached and installed to be sent to a laboratory for verification, potential safety hazards of the carbon monoxide alarm without gas exist on site, and standard gas needs to be transported in real time when the laboratory performs the verification of the alarm, so that the waste of the standard gas is caused.
Disclosure of Invention
The invention provides a carbon monoxide on-line calibration device and method, which are used for solving the problem of gas waste caused by detection of a carbon monoxide detector.
According to an aspect of the present invention, there is provided an on-line calibration device for carbon monoxide, the device comprising: the system comprises a calibration system, an air source pipe, a calibration air tank, a carbon monoxide alarm instrument and a standard air cylinder; the calibration system is used for calibrating and calibrating the carbon monoxide alarm; the standard gas cylinder includes: a standard nitrogen gas cylinder, a standard high-concentration carbon monoxide gas cylinder and a standard low-concentration carbon monoxide gas cylinder, wherein the standard nitrogen gas is nitrogen with the pressure of 9.5MPa and the concentration of 99 percent, the standard high-concentration carbon monoxide gas is carbon monoxide gas with the pressure of 9.5MPa and the concentration of 1400 mu mol/mol, and the standard low-concentration carbon monoxide gas is carbon monoxide gas with the pressure of 9.5MPa and the concentration of 50 mu mol/mol; the calibration gas tank is used for uniformly stirring the standard gas and isolating the standard gas from air;
the calibration system is connected with the carbon monoxide alarm instrument through a wireless communication module;
The standard gas cylinder is connected with the calibration gas cylinder through the gas source pipe, and the gas source pipe is connected with the carbon monoxide alarm instrument through the calibration gas cylinder;
wherein the calibration system is configured to: and controlling a gas valve of a standard gas cylinder to be opened, conveying the standard gas into a calibration gas cylinder through a gas source pipe, calibrating the carbon monoxide alarm according to the detection result of the carbon monoxide alarm, and measuring the detection result of the carbon monoxide alarm by the carbon monoxide alarm.
According to another aspect of the present invention, there is provided a method for on-line calibration of carbon monoxide, the method comprising:
the calibration system controls a gas valve to be opened and transmits the standard gas to the calibration gas tank;
Determining the first gas concentration value in a calibration gas tank through the carbon monoxide alarm instrument, wherein the first gas concentration value is a concentration value obtained by detecting the standard gas through the carbon monoxide alarm instrument;
And calibrating the carbon monoxide alarm instrument through the calibration system according to the first gas concentration value.
According to the technical scheme, when the on-line calibration device for carbon monoxide only consumes a small amount of standard gas, the on-site carbon monoxide alarm can be calibrated on line, the on-site carbon monoxide alarm is not required to be detached and installed to be sent to a laboratory for calibration, the calibration device and the carbon monoxide alarm can calibrate and adjust the output value of the carbon monoxide alarm in a wireless communication mode, the output result value of the carbon monoxide alarm is not required to be corrected and set according to the calibration result, and meanwhile the output signal value of the carbon monoxide alarm is calibrated, so that the calibration of a centralized display controller of the carbon monoxide alarm is achieved, and the calibration efficiency is improved.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 shows an on-line calibration device for carbon monoxide according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a calibration system according to an embodiment of the present invention;
FIG. 3 is a front view of an on-line calibration device for carbon monoxide according to an embodiment of the present invention;
FIG. 4 is a connection diagram of an on-line calibration device for carbon monoxide provided by an embodiment of the invention;
FIG. 5 is a diagram of a carbon monoxide alarm device according to an embodiment of the present invention;
FIG. 6 is a diagram of a centralized display alarm controller according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of an exemplary embodiment of an online calibration method for carbon monoxide;
FIG. 8 is a flow chart for initializing on-line calibration of carbon monoxide according to an embodiment of the present invention;
FIG. 9 is a flow chart for on-line calibration of carbon monoxide according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a schematic diagram of an on-line calibration device for carbon monoxide according to an embodiment of the present invention, where the embodiment is applicable to calibration of a carbon monoxide detector. As shown in fig. 1, the carbon monoxide on-line calibration device 1 includes: the device comprises a calibration system 2, an air source pipe 3, a calibration air tank 4, a carbon monoxide alarm 5 and a standard air bottle 6.
The calibration system 2 is used for calibrating and calibrating the carbon monoxide alarm 5.
The calibration system 2 is configured to: the gas valve 31 of the standard gas bottle 6 is controlled to be opened, standard gas is conveyed into the calibration gas bottle 4 through the gas source pipe 3, and the carbon monoxide alarm 5 is calibrated according to the detection result of the carbon monoxide alarm 5. The detection result of the carbon monoxide alarm 5 is obtained by detecting the carbon monoxide alarm 5.
Optionally, the calibration system 2 comprises:
the calibration gas tank control module 21 is used for controlling the standard gas cylinder 6, the gas valve 31 and the calibration gas tank 4.
The detection alarm calibration module 22 is used for calibrating the carbon monoxide alarm 5.
A rechargeable power module 23 for powering the calibration system 2.
And the wireless communication module 24 is used for communicating with the carbon monoxide alarm 5.
The man-machine dialogue module 25 is used for prompting and setting the calibration flow of the carbon monoxide alarm 5.
I/O module 26 is for connection to a detection device.
Illustratively, as shown in fig. 2, the man-machine dialogue module 25 is connected to the calibration gas tank control module 21 and the carbon monoxide alarm calibration module 22, and is used for prompting and setting the calibration flow of the carbon monoxide alarm 5; the wireless communication module 24 is connected with the calibration gas tank control module 21 and the carbon monoxide alarm calibration module 22, and communicates with the carbon monoxide alarm 5 through the wireless communication 24 to realize signal transmission between the carbon monoxide alarm 5 and the calibration system 2; the wireless power supply module 24 and the man-machine interaction module 25. The calibration gas tank control module 21 is connected with the carbon monoxide alarm calibration module 22 and is used for supplying power to the modules; the I/O module 26 is connected with the calibration gas tank control module 21 and the carbon monoxide alarm calibration module 22 and is used for transmitting signals of various sensors and devices to the control module.
Further, the detection apparatus includes: the fan 43, the first vacuum pump 421, the second vacuum pump 422, the first pressure sensor 441, the second pressure sensor 442, the first electrically controlled valve 45, and the second electrically controlled valve 33 are connected.
The standard gas cylinder 6 includes: a standard nitrogen gas tank 61, a standard high-concentration carbon monoxide gas tank 62 and a standard low-concentration carbon monoxide gas tank 63, wherein the standard nitrogen gas is nitrogen with the pressure of 9.5MPa and the concentration of 99%, the standard high-concentration carbon monoxide gas is carbon monoxide gas with the pressure of 9.5MPa and the concentration of 1400 mu mol/mol, and the standard low-concentration carbon monoxide gas is carbon monoxide gas with the pressure of 9.5MPa and the concentration of 50 mu mol/mol.
Fig. 3 is an illustration of a standard nitrogen gas tank 61, a standard high-concentration carbon monoxide gas tank 62, and a standard low-concentration carbon monoxide gas tank 63 arranged in the carbon monoxide online calibration device 1.
The calibration gas tank 4 is used for stirring the standard gas uniformly and isolating the standard gas from the air.
Optionally, the calibration cylinder 4 comprises: a nitrogen calibration gas tank, a high-concentration carbon monoxide calibration gas tank and a low-concentration carbon monoxide calibration gas tank.
Further, the calibration cylinder 4 includes: the calibrating gas tank cavity 41, the vacuum pump 42, the fan 43, the pressure sensor 44, the first electric control valve 45 and the quick connector 46; calibrating the tank cavity 41 includes: the first cavity 411 and the second cavity 412, wherein the first cavity 411 is used for storing standard gas, and the second cavity 412 is used for being connected with the carbon monoxide alarm 5; the pressure sensor 44 includes: a first pressure sensor 441 and a second pressure sensor 442, the first pressure sensor 441 being configured to monitor a pressure in the first chamber 411, the second pressure sensor 442 being configured to monitor a pressure in the second chamber 412; the vacuum pump includes: a first vacuum pump 421 for reducing the pressure in the first chamber 411 and discharging the gas in the first chamber 411, and a second vacuum pump 422 for isolating the calibration cylinder 4 from the air. Wherein the first vacuum pump 421, the fan 43 and the first pressure sensor 441 are disposed in the first cavity 411; the second vacuum pump 422, the first electrically controlled valve 45, the second pressure sensor 442 and the quick connector 46 are disposed in the second chamber 412.
As shown in fig. 4, the first vacuum pump 421, the fan 43 and the first pressure sensor 441 are distributed from bottom to top in the first cavity 411; the first electric control valve 45, the second vacuum pump 422 and the second pressure sensor 442 are distributed in the second cavity 412 from bottom to top, wherein the second vacuum pump 422 and the second pressure sensor 442 are distributed in parallel.
The calibration system 2 is connected with the carbon monoxide alarm 5 through a wireless communication module.
The standard gas cylinder 6 is connected with the calibration gas cylinder 4 through the gas source pipe 3, and the gas source pipe 3 is connected with the carbon monoxide alarm instrument 5 through the calibration gas cylinder 4.
The standard gas cylinder 6 passes through air supply pipe 3 and marks gas pitcher 4, and air supply pipe 3 passes through and marks gas pitcher 4 and links to each other with carbon monoxide alarm 5, includes:
The standard gas cylinder 6 is connected to a hose 32 via a gas valve 31, and the hose 32 is connected to the calibration gas cylinder 4 via a second electrically controlled valve 33.
The calibration gas tank 4 is connected with the carbon monoxide alarm 5 through a quick connector 46.
Illustratively, as shown in FIG. 4, a standard nitrogen tank 61 is connected to the hose 32 via the gas valve 31, the hose 32 is connected to the calibration tank 4 via the second electrically controlled valve 33, and the calibration tank 4 is connected to the carbon monoxide alarm 5 via the quick connector 46, wherein the quick connector 46 is connected to the carbon monoxide alarm 5 via the carbon monoxide alarm probe 51.
Optionally, the carbon monoxide alarm 5 further includes:
a display and audible and visual alarm 52 for displaying the detected carbon monoxide concentration value;
An I/O module 53 for connecting to other external devices such as a CO sensor 58;
A bus communication sub-module 54 for communicating with the controller;
the wireless communication module 55 is used for communicating with the calibration system 2;
a measurement module 56 for acquiring monitoring data of a CO sensor 58;
The direct current power supply module 57 is used for supplying power to the carbon monoxide alarm 5 and is connected with the controller power supply module;
a CO sensor 58 for detecting the CO gas concentration.
As shown in fig. 5, the connection structure of the carbon monoxide alarm 5 is as follows: the measuring module 56 is respectively connected with the display and audible and visual alarm 52, the I/O module 53, the bus communication sub-module 54, the wireless communication module 55, the direct current power supply module 57 and the CO sensor 58; the bus communication sub-module 54 is connected to a dc power module 57.
Optionally, the carbon monoxide calibrating device further comprises a controller, wherein:
The bus communication module is used for communicating with the bus communication module 54 of the carbon monoxide alarm 5 to complete data transmission;
The data acquisition and storage module is used for storing the CO concentration data obtained from the carbon monoxide alarm 5;
The display audible and visual alarm module is used for controlling the display interface to display the position of the carbon monoxide alarm 5 at the position of the concentration overrun when the concentration of CO exceeds a preset value and controlling the audible and visual alarm to alarm;
And the audible and visual alarm is used for alarming and prompting.
Exemplary, as shown in fig. 6, the connection structure of the controller is: the bus communication module is connected with the bus communication sub-module 54, the power module and the data acquisition and storage module; the power supply module is connected with the direct current power supply module 57; the data acquisition and storage module is connected with the audible and visual alarm module; the audible and visual alarm module is connected with the audible and visual alarm.
According to the technical scheme, when the on-line calibration device for carbon monoxide only consumes a small amount of standard gas, the on-site carbon monoxide alarm can be calibrated on line, the on-site carbon monoxide alarm is not required to be detached and installed to be sent to a laboratory for calibration, the calibration device and the carbon monoxide alarm can calibrate and adjust the output value of the carbon monoxide alarm in a wireless communication mode, the output result value of the carbon monoxide alarm is not required to be corrected and set according to the calibration result, and meanwhile the output signal value of the carbon monoxide alarm is calibrated, so that the calibration of a centralized display controller of the carbon monoxide alarm is achieved, and the calibration efficiency is improved.
Fig. 7 is a schematic structural diagram of an online calibration method for carbon monoxide according to an embodiment of the present invention. The method is applicable to the calibration of the carbon monoxide detector. As shown in fig. 7, the method includes:
S210, the calibration system controls the gas valve to be opened, and standard gas is delivered to the calibration gas tank.
And (3) establishing wireless connection between the calibration system and the carbon monoxide alarm instrument, and opening a gas valve of the calibration gas cylinder to start delivering gas to the calibration gas cylinder when the connection is detected to be successfully established.
Further, the gas is prepared to the corresponding calibration gas tanks according to the sequence of the standard nitrogen, the high-concentration carbon monoxide gas and the low-concentration carbon monoxide gas.
For example, as shown in fig. 8, a power switch of the calibration system is turned on, the calibration system displays two operation options of system initialization and meter calibration, and when the calibration gas tank is an empty tank, the standard gas tank is not connected with the calibration gas tank, and the gas source channel is not ready, the initialization operation of gas tank preparation is selectively executed. Initializing a first step, wherein a calibration system is connected with a carbon monoxide alarm instrument in a wireless way, and detects whether the connection is successful, and when the calibration system is connected with the carbon monoxide alarm instrument successfully, a display screen prompts the carbon monoxide alarm instrument to be connected successfully, and the carbon monoxide alarm instrument sends an identification for detecting that the carbon monoxide alarm instrument is in a calibration state to a controller, so that an upper computer is reminded that the detection data of the carbon monoxide alarm instrument is calibration process data; the second step of the display screen prompts to close the valve of the 1# gas cylinder, the valve is confirmed to be closed according to the touch screen, the 1# gas cylinder is prompted to be connected with the 1# gas cylinder, the 1# gas cylinder is connected with the standard gas cylinder through the pressure reducing valve, the first electric control valve is closed, the second electric control valve is opened, and the 1# gas cylinder is confirmed to be connected according to the touch screen; the third step, exhausting the first vacuum pump 1# and closing the first vacuum pump 1# when the vacuum degree of the gas tank 1# is not changed any more, wherein the display screen prompts slow manual opening of the pressure reducing valve, and when the pressure of the gas tank 1# is greater than the atmospheric pressure of 10kPa, the second electric control valve is closed, and the display screen prompts the gas tank 1# to complete gas preparation; after the touch screen confirms that the gas preparation of the 1# gas tank is finished, the gas preparation of the 2# gas tank and the 3# gas tank is finished as the gas preparation flow of the 1# gas tank, and the calibration system is finished to finish the preparation of a standard gas environment. The No. 1 gas tank is a nitrogen calibration gas tank; the No. 2 gas tank is a high-concentration carbon monoxide calibration gas tank; the 3# gas tank is a low-concentration carbon monoxide calibration gas tank; the No. 1 vacuum pump is a first vacuum pump arranged in a nitrogen calibration gas tank; the No. 1 gas cylinder is a standard nitrogen gas cylinder, and the No. 1 gas cylinder valve is a gas valve corresponding to the standard nitrogen gas cylinder.
S220, determining a first gas concentration value in the calibration gas tank through a carbon monoxide alarm instrument.
The first gas concentration value is a concentration value obtained by detecting standard gas by a carbon monoxide alarm.
And detecting standard gas in a calibration gas tank by the carbon monoxide alarm to obtain a first gas concentration value.
S230, calibrating the calibration system through a carbon monoxide alarm according to the first gas concentration value.
And calibrating the carbon monoxide alarm instrument through a calibration system according to the deviation between the first concentration value and the standard gas concentration value.
Optionally, calibrating the carbon monoxide alarm by the calibration system according to the first gas concentration value includes steps A1-A4:
and A1, correcting the detection range of the carbon monoxide alarm according to the second gas concentration value.
The second gas concentration value is the concentration value of the standard gas in the standard gas tank at the previous time.
And correcting the detection range of the carbon monoxide alarm according to whether the concentration value of the standard gas recorded by the carbon monoxide alarm in the previous calibration is the same as the concentration value of the standard gas.
Optionally, correcting the standard gas concentration value in the standard gas tank according to the second gas concentration value includes steps B1-B2:
And B1, if the concentration value of the second gas is the same as the measuring range calibration value, the detection range of the carbon monoxide alarm instrument is kept unchanged.
Wherein, the measurement range calibration value is a standard gas concentration value detected when the carbon monoxide alarm device performs measurement range calibration, namely, the standard nitrogen is nitrogen with the pressure of 9.5MPa and the concentration of 99 percent, the standard high-concentration carbon monoxide gas is carbon monoxide gas with the pressure of 9.5MPa and the concentration of 1400 mu mol/mol, and the standard low-concentration carbon monoxide gas is carbon monoxide gas with the pressure of 9.5MPa and the concentration of 50 mu mol/mol.
If the second gas concentration value is the same as the detected calibration gas concentration value, the detection range of the carbon monoxide alarm instrument is kept unchanged.
And B2, if the concentration value of the second gas is different from the measuring range calibration value, correcting the measuring range of the carbon monoxide alarm according to the measuring range calibration value.
And if the second gas concentration value is the same as the detected calibration gas concentration value, correcting the measuring range of the carbon monoxide alarm according to the measuring range calibration value.
For example, the display interface calls the standard gas concentration information of the previous 1# tank, if the concentration is not changed, the manual confirmation is directly carried out, and if the concentration is changed, the concentration value is corrected. The standard gas concentration information of the previous 1# gas tank is a second gas concentration value of standard nitrogen; the No. 1 gas tank is a nitrogen calibration gas tank.
Further, before the detection range correction is performed, it is also required to ensure that the pressure value in the calibration gas tank is greater than 10kPa, that is, when the display interface prompts connection of the calibration gas tank, the touch screen is used to confirm that the calibration gas tank is connected, at this time, the display interface displays the pressure values of the first pressure sensor and the second pressure sensor of the calibration gas tank, the second vacuum pump is turned on, when the vacuum degree of the second pressure sensor is no longer changed, the second vacuum pump is turned off, the first electric control valve is turned on, if the pressure value of the calibration gas tank is less than or equal to atmospheric pressure, the second electric control valve is turned on to perform gas filling, and the gas tank pressure is greater than 10kPa, and the second electric control valve is turned off.
The method comprises the steps that an example is shown, when a display interface prompts to connect a 1# gas tank, the completion of the connection of the 1# gas tank is confirmed according to a touch screen, the display screen displays a 1# gas tank first pressure sensor and a second pressure sensor, a 1# second vacuum pump is started, when the vacuum degree of the second pressure sensor is not changed any more, the 1# second vacuum pump is closed, a first electric control valve is opened, if the pressure value of the 1# gas tank is smaller than or equal to atmospheric pressure, a second electric control valve is opened for gas supplementing, the gas tank pressure is larger than 10kPa, and the second electric control valve is closed; the second vacuum pump 1# is a second vacuum pump in the gas tank 1 #; the No. 1 gas tank is a nitrogen calibration gas tank.
And A2, starting a fan, and continuously presetting time to obtain a first gas concentration value.
The preset time is a preset time for starting the fan, and may be, for example, 2 minutes.
After finishing the range correction of the carbon monoxide alarm, starting a fan, and continuously presetting time, reading the concentration value of the standard gas displayed on the display interface, and taking the concentration value as a first gas concentration value.
Further, the fan is started and the preset time is continued to ensure that the gas in the calibration gas tank can be uniformly distributed in the calibration gas tank, so that the detection accuracy of the carbon monoxide alarm instrument is ensured.
And A3, calibrating the carbon monoxide alarm according to the first gas concentration value.
Optionally, calibrating the carbon monoxide alarm according to the detection data of the carbon monoxide alarm, including the steps of C1-C4:
And C1, if the deviation value of the first gas concentration value and the standard gas concentration value is larger than the preset deviation value, replacing the first gas concentration value by the standard gas concentration value.
The preset deviation value is a deviation between a preset gas concentration value meeting the calibration requirement and a standard gas concentration value, and is exemplified by 10%.
If the deviation value of the detected first gas concentration value and the standard gas concentration value is larger than the preset deviation value, the carbon monoxide alarm is considered to be required to be corrected, and the standard gas concentration value is adopted to replace the first gas concentration value, so that the correction is completed.
And C2, if the deviation value of the first gas concentration value and the standard gas concentration value is smaller than or equal to the preset deviation value, keeping unchanged.
If the deviation value of the detected first gas concentration value and the standard gas concentration value is smaller than or equal to the preset deviation value, the carbon monoxide alarm is considered to be unnecessary to be corrected, and the first gas concentration value is kept unchanged.
And C3, determining a verification detection result of the carbon monoxide alarm according to the corrected carbon monoxide alarm.
The verification detection result comprises the following steps: a third gas concentration value and an alarm state value. The third gas concentration value is a standard gas concentration value detected by a corrected carbon monoxide alarm.
And detecting the standard gas according to the corrected carbon monoxide alarm to obtain a verification detection result of the carbon monoxide alarm, namely adopting the corrected carbon monoxide alarm to detect the concentration value of the obtained standard gas and the alarm state value of the carbon monoxide alarm.
And C4, calibrating the carbon monoxide alarm instrument for the second time according to the verification and detection result.
And (5) calibrating the carbon monoxide alarm instrument for the second time according to the accuracy of the verification detection result.
Optionally, the carbon monoxide alarm is calibrated for the second time according to the verification and detection result, which comprises the following steps of D1-D2:
And D1, if the deviation value of the third gas concentration value and the standard gas concentration value is smaller than or equal to the preset deviation value and the alarm state value accords with the preset alarm value, the calibration is completed.
The preset alarm value comprises the following steps: the primary alarm is 24ppm and the secondary alarm is 160ppm.
If the deviation value of the detected third gas concentration value and the standard gas concentration value is smaller than or equal to the preset deviation value, and the alarm state value accords with the first-level alarm 24ppm and the second-level alarm 160ppm, the calibration is completed.
And D2, if the deviation value of the third gas concentration value and the standard gas concentration value is larger than the preset deviation value and/or the alarm state value does not accord with the preset alarm value, continuing to correct.
If the deviation value of the detected third gas concentration value and the standard gas concentration value is larger than the preset deviation value, the calibration is required to be continued.
Or if the deviation value of the detected third gas concentration value and the standard gas concentration value is smaller than or equal to the preset deviation value, but the alarm state value does not accord with the preset alarm value, continuing to calibrate.
Or if the deviation value of the detected third gas concentration value and the standard gas concentration value is larger than the preset deviation value and the alarm state value does not accord with the preset alarm value, continuing to correct.
As shown in fig. 9, the calibration flow of the carbon monoxide alarm is as follows: taking nitrogen calibration as an example; the display interface prompts to connect the 1# gas tank, the completion of the connection of the 1# gas tank is confirmed according to the touch screen, the display interface displays the pressure values of the first pressure sensor and the second pressure sensor of the calibration gas tank, the 1# second vacuum pump is started, when the vacuum degree of the second pressure sensor is not changed any more, the 1# second vacuum pump is closed, the first electric control valve is started, if the pressure value of the 1# gas tank is smaller than or equal to the atmospheric pressure, the second electric control valve is started for air supplementing, the pressure of the calibration gas tank is larger than 10kPa, and the second electric control valve is closed for next operation; the display interface calls out the standard gas concentration information of the previous 1# gas tank, if the concentration is not changed, the manual confirmation is directly carried out, and if the concentration is changed, the concentration value is corrected; after the concentration confirmation is completed, starting a No.1 fan for a preset time, reading a display value, an output signal value and an alarm state value of the carbon monoxide alarm instrument, displaying the display value, the output signal value and the alarm state value on a display interface, prompting to correct the deviation if the deviation between the display value of the carbon monoxide alarm instrument and the standard gas concentration value is larger than the preset deviation value, completing the calibration of measurement data of the measuring range section by the carbon monoxide alarm instrument after the correction is confirmed, comparing the display value, the output signal value and the alarm state value of the carbon monoxide alarm instrument, if the deviation of the concentration value is not larger than the preset deviation value, the alarm value is in line with the alarm setting state of the primary alarm 24ppm and the secondary alarm 160ppm, closing a first electric control valve, prompting to connect the No.2 gas tank, prompting to connect the 3 gas tank to calibrate the alarm instrument after the calibration is completed. The No.1 gas tank is a nitrogen calibration gas tank; the No.1 second vacuum pump is a vacuum pump in a nitrogen calibration gas tank; the No.1 fan is a fan in a nitrogen calibration gas tank; a 2# gas tank high-concentration carbon monoxide calibration gas tank; 3# gas tank low concentration carbon monoxide calibration gas tank.
Optionally, after calibrating the carbon monoxide alarm by the calibration system according to the gas concentration value, the method comprises the steps of E1-E2:
and E1, closing the first electric control valve, and judging the connection state of the calibration gas tank and the carbon monoxide alarm.
Wherein, the connection state includes: disconnect and maintain the connection.
After the calibration of the carbon monoxide alarm instrument is completed, the first electric control valve is closed, the standard gas is stopped being conveyed, and the connection state of the calibrated gas tank and the carbon monoxide alarm instrument is cut off.
And E2, if the connection state of the carbon monoxide alarm is disconnection, the carbon monoxide alarm is restored to a normal monitoring state.
If the connection state of the carbon monoxide alarm is disconnection, the carbon monoxide alarm sends a normal working state signal, and the carbon monoxide alarm and the controller recover to a normal detection state.
Further, when the next carbon monoxide alarm device is calibrated online, the calibration gas tank is in the gas preparation state, so that the calibration flow of the carbon monoxide alarm device is directly executed, and the initialization operation is not needed.
From the above description of embodiments, it will be apparent to those skilled in the art that the embodiments of the present invention may be implemented by software and necessary general purpose hardware, and of course may be implemented by hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the embodiments of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a FLASH Memory (FLASH), a hard disk, or an optical disk of a computer, where the instructions include a number of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method of the embodiments of the present invention.
It should be noted that, in the embodiment of the system described above, each structure included is only divided according to the functional logic, but not limited to the above division, so long as the corresponding function can be implemented; in addition, specific names of the functional structures are also only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the embodiments of the present invention have been described in connection with the above embodiments, the embodiments of the present invention are not limited to the above embodiments, but may include many other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. An on-line carbon monoxide calibration device, comprising: the system comprises a calibration system, an air source pipe, a calibration air tank, a standard gas cylinder carbon monoxide alarm instrument and a standard gas cylinder; the calibration system is used for calibrating and calibrating the carbon monoxide alarm; the standard gas cylinder includes: a standard nitrogen gas cylinder, a standard high-concentration carbon monoxide gas cylinder and a standard low-concentration carbon monoxide gas cylinder, wherein the standard nitrogen gas is nitrogen with the pressure of 9.5MPa and the concentration of 99 percent, the standard high-concentration carbon monoxide gas is carbon monoxide gas with the pressure of 9.5MPa and the concentration of 1400 mu mol/mol, and the standard low-concentration carbon monoxide gas is carbon monoxide gas with the pressure of 9.5MPa and the concentration of 50 mu mol/mol; the calibration gas tank is used for uniformly stirring the standard gas and isolating the standard gas from air;
the calibration system is connected with the carbon monoxide alarm instrument through a wireless communication module;
The standard gas cylinder is connected with the calibration gas cylinder through the gas source pipe, and the gas source pipe is connected with the carbon monoxide alarm instrument through the calibration gas cylinder;
Wherein the calibration system is configured to: controlling a gas valve of a standard gas cylinder to be opened, and conveying the standard gas to a calibration gas cylinder through a gas source pipe; and calibrating the carbon monoxide alarm according to the detection result of the carbon monoxide alarm, wherein the detection result of the carbon monoxide alarm is obtained by measuring the carbon monoxide alarm.
2. The system of claim 1, wherein the calibration system comprises:
The calibration gas tank control module is used for controlling the standard gas cylinder, the gas valve and the calibration gas tank;
the detection alarm calibration module is used for calibrating the carbon monoxide alarm;
the rechargeable power supply module is used for supplying power to the calibration system;
the wireless communication module is used for communicating with the carbon monoxide alarm;
The man-machine dialogue module is used for prompting and setting the calibration flow;
And the I/O module is used for being connected with the detection equipment.
3. The system of claim 1, wherein the calibration cylinder comprises: a nitrogen calibration gas tank, a high-concentration carbon monoxide calibration gas tank and a low-concentration carbon monoxide calibration gas tank;
Wherein, the calibration gas tank includes: calibrating a gas tank cavity, a vacuum pump, a fan, a pressure sensor, a first electric control valve and a quick connector; the calibration gas tank cavity comprises: the first cavity is used for storing the standard gas, and the second cavity is used for being connected with the carbon monoxide alarm instrument; the pressure sensor includes: a first pressure sensor for monitoring the pressure in the first cavity and a second pressure sensor for monitoring the pressure in the second cavity; the vacuum pump includes: a first vacuum pump for reducing the pressure in the first cavity and exhausting the gas in the first cavity, and a second vacuum pump for isolating the calibration gas tank from air;
wherein the first vacuum pump, the fan and the first pressure sensor are arranged in the first cavity;
the second vacuum pump, the first electric control valve, the second pressure sensor and the quick connector are arranged in a second cavity.
4. The system of claim 1, wherein the standard gas cylinder is connected to the calibration gas cylinder by the gas supply line, and the gas supply line is connected to the carbon monoxide alarm by the calibration gas cylinder, comprising:
The standard gas cylinder is connected with a hose through a gas valve, and the hose of the electric control valve is connected with the calibration gas cylinder through a second electric control valve;
The calibration gas tank is connected with the carbon monoxide alarm instrument through the quick connector.
5. An online calibration method for carbon monoxide, which is characterized by comprising the following steps:
the calibration system controls a gas valve to be opened and transmits the standard gas to the calibration gas tank;
Determining the first gas concentration value in a calibration gas tank through the carbon monoxide alarm instrument, wherein the first gas concentration value is a concentration value obtained by detecting the standard gas through the carbon monoxide alarm instrument;
And calibrating the carbon monoxide alarm instrument through the calibration system according to the first gas concentration value.
6. The method of claim 5, wherein calibrating the carbon monoxide alarm by the calibration system based on the first gas concentration value comprises:
Correcting the detection range of the carbon monoxide alarm according to a second gas concentration value, wherein the second gas concentration value is the concentration value of the standard gas in the standard gas tank at the previous time;
Starting a fan, and continuously presetting time to obtain the first gas concentration value;
and calibrating the carbon monoxide alarm according to the first gas concentration value.
7. The method of claim 6, wherein modifying the standard gas concentration value in the standard gas tank based on a second gas concentration value comprises:
If the second gas concentration value is the same as a measuring range calibration value, the detection measuring range of the carbon monoxide alarm instrument is kept unchanged, and the measuring range calibration value is a standard gas concentration value obtained by detection when the carbon monoxide alarm instrument performs measuring range calibration;
and if the second gas concentration value is different from the measuring range calibration value, correcting the measuring range of the carbon monoxide alarm according to the measuring range calibration value.
8. The method of claim 6, calibrating the carbon monoxide alarm based on the detection data of the carbon monoxide alarm, comprising:
If the deviation value of the first gas concentration value and the standard gas concentration value is larger than a preset deviation value, replacing the first gas concentration value by the standard gas concentration value;
If the deviation value of the first gas concentration value and the standard gas concentration value is smaller than or equal to a preset deviation value, keeping the deviation value unchanged;
Determining a verification detection result of the carbon monoxide alarm according to the corrected carbon monoxide alarm, wherein the verification detection result comprises the following steps of: a third gas concentration value and an alarm state value;
And calibrating the carbon monoxide alarm instrument for the second time according to the verification and detection result.
9. The method of claim 8, wherein secondarily calibrating the carbon monoxide alarm based on the verification test results comprises:
If the deviation value of the third gas concentration value and the standard gas concentration value is smaller than or equal to the preset deviation value and the alarm state value accords with the preset alarm value, the calibration is completed; the preset alarm value comprises: the primary alarm is 24ppm and the secondary alarm is 160ppm; and if the deviation value of the third gas concentration value and the standard gas concentration value is larger than the preset deviation value and/or the alarm state value does not accord with the preset alarm value, continuing to correct.
10. The method of claim 5, wherein calibrating the carbon monoxide alarm by the calibration system based on the gas concentration value comprises:
Closing a first electric control valve, and judging the connection state of the calibration gas tank and the carbon monoxide alarm instrument, wherein the connection state comprises the following steps: disconnecting and maintaining the connection;
And if the connection state of the carbon monoxide alarm instrument is disconnection, the carbon monoxide alarm instrument is restored to a normal monitoring state.
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| CN202410219502.7A CN118097912A (en) | 2024-02-28 | 2024-02-28 | Carbon monoxide on-line calibration device and method |
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| CN202410219502.7A CN118097912A (en) | 2024-02-28 | 2024-02-28 | Carbon monoxide on-line calibration device and method |
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