CN117705972A - Accurate detection device of hand-held type gas transmission pipeline inner wall - Google Patents
Accurate detection device of hand-held type gas transmission pipeline inner wall Download PDFInfo
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- CN117705972A CN117705972A CN202311707046.2A CN202311707046A CN117705972A CN 117705972 A CN117705972 A CN 117705972A CN 202311707046 A CN202311707046 A CN 202311707046A CN 117705972 A CN117705972 A CN 117705972A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/005—Protection or supervision of installations of gas pipelines, e.g. alarm
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/24—Suction devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V9/00—Prospecting or detecting by methods not provided for in groups G01V1/00 - G01V8/00
- G01V9/007—Prospecting or detecting by methods not provided for in groups G01V1/00 - G01V8/00 by detecting gases or particles representative of underground layers at or near the surface
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/12—Alarms for ensuring the safety of persons responsive to undesired emission of substances, e.g. pollution alarms
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
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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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Abstract
The invention discloses a hand-held accurate detection device for the inner wall of a gas transmission pipeline, which comprises an acquisition channel, wherein a semiconductor sensor is carried in a shell, a circuit board, a power supply module, an air pump and a gas sensor are contained in the shell, and an air inlet pipe, the air pump and the gas sensor are sequentially communicated to form a VOCs acquisition channel; on the one hand, the surface of the circuit board is soldered with a main control chip and an analog-to-digital conversion module, and the main control chip, the gas sensor and the analog-to-digital conversion module form a VOCs calculation module, which relates to the technical field of pipeline air quality monitoring. The audible and visual alarm, the communication module and the emission module are arranged, when the device is used, if the digital signal is larger than or equal to the set value, the main control chip runs through the audible and visual alarm, and the digital signal and the alarm prompt are sent to the handheld terminal through the communication module and the emission module, so that a user can be informed of taking measures as soon as possible, the dangerous case of the pipeline is controlled, and the safety of the device is improved.
Description
Technical Field
The invention relates to the technical field of pipeline air quality monitoring, in particular to a hand-held accurate detection device for the inner wall of a gas pipeline and a use method thereof.
Background
The pipeline gas detection is a method for detecting the concentration of gas in a pipeline, is generally used in the fields of industrial production, mining and the like, and can ensure the safety of workers and the normal operation of production equipment. The method for detecting the pipeline gas mainly comprises three methods: the portable gas detector is used for point location detection, the gas detection tube is adopted for predicting dangerous situations in advance, and the fixed gas detection system is used for continuous monitoring.
In the prior art, when the portable gas detector is used for point position detection, the content and the type of the pipeline gas are detected, but the problems that gas molecules stay in the pipeline and cause blockage of a gas measuring line easily occur during gas detection, and the detected pipeline gas results are inaccurate, so that there is room for improvement.
Disclosure of Invention
In order to achieve the above purpose, the invention provides a hand-held accurate detection device for the inner wall of a gas pipeline and a use method thereof, the device comprises a collection channel, the semiconductor sensor is carried in a shell, a circuit board, a power module, an air pump and a gas sensor are contained in the shell, wherein the air inlet pipe, the air pump and the gas sensor are sequentially communicated to form a VOCs collection channel;
the multifunctional module comprises a main control chip and an analog-to-digital conversion module, wherein the main control chip, a gas sensor and the analog-to-digital conversion module form a VOCs calculation module, and a power module, an audible and visual alarm, a communication module, a transmitting module and a liquid crystal display screen are fixedly arranged inside and outside the shell, wherein the power module, the audible and visual alarm, the communication module, the transmitting module and the liquid crystal display screen are respectively combined with the VOCs calculation module to form energy supply, alarm, communication, transmitting and display sub-functions contained in the multifunctional module; and the control module takes the key circuit as a control main body and collects and calculates the semiconductor sensor.
Preferably, the method comprises the following steps:
step S1: communicating the gas chromatograph with the device to complete detection pretreatment;
step S2: the VOCs collecting channel is driven to work by the control module, so that the VOCs collecting channel sucks gas into the device, and the pipeline gas loop is subjected to blocking test by the gas pressure sensor,
step S21: the air pump is operated through the key circuit, the air pump is operated to suck air into the device, and the air loop of the pipeline is tested through the air pressure sensor;
step S22: judging whether the gas passage is blocked or not, and judging that the gas loop of the pipeline is not blocked if the detected gas pressure value is smaller than the set pressure value;
step S3: after the loop blocking test is finished, screening gas, and measuring the gas concentration by utilizing the cooperation of the device and a gas chromatograph, when the pipeline gas loop is not blocked, opening the gas chromatograph, injecting a sample into a chromatographic column through a proper gas path system, controlling the entering amount and the injection time of the sample by using a valve in the gas path system, and separating the sample in the chromatographic column according to respective physical and chemical properties;
step S31: after separation, detecting signals of all components through a detector, amplifying and recording the signals through electronic equipment, and obtaining the concentration of all components in a sample through calculation and analysis according to the measurement principle of the instrument and a calibration curve on the instrument;
step S32: the air pump and the gas sensor operate to ionize the gas entering the gas sensor;
step S33: the actual concentration of the gas is reflected by the ionized ion quantity, and the digital signal is converted by the analog-to-digital conversion module, so that the concentration of the detected VOC gas can be intuitively known;
step S4: transmitting the information into the multifunctional module through the VOCs calculation module, and selecting to alarm, communicate, emit and display according to the measured gas concentration and the measured conditions;
step S41: after the generated signals are transmitted to an analog-to-digital conversion module for digital signal conversion, corresponding digital signals are generated and transmitted to a serial port of a main control chip through an output channel of the conversion chip;
step S42: the main control chip displays the received digital signals in real time through the liquid crystal display screen, and processes and compares the signals.
Preferably, S2 further comprises the steps of:
if the detected gas pressure value is larger than the set pressure value, judging that the gas loop of the pipeline is blocked;
the measurement formula according to the amperometric electrochemical gas detector can be expressed as:
I＝KxC
where I is the current intensity, K is a constant, C is the gas concentration, and the current intensity is proportional to the gas concentration;
the measurement formula according to the potential type electrochemical gas detector can be expressed as:
E＝KxlogC
where E is the potential, K is a constant, C is the gas concentration, and the potential is logarithmic with respect to the gas concentration;
the formula of the separation degree C of the gas chromatograph is as follows:
wherein Tr is A And Tr B The corrected retention times, W, of the two components, respectively A And W is B Then their half-widths, respectively;
the theoretical maximum value of the degree of separation C is 1, and in actual operation, it is generally considered that the degree of separation C is 0.9 or more, which has a good separation effect. When the degree of separation C is less than 0.8, then it is generally necessary to employ other columns or optimize the separation conditions;
therefore, the air ionization degree is introduced to satisfy the separation condition, wherein the calculation formula of the air separation degree N is:
N＝nxq
where N represents the number of ionized particles in the unit volume of air, N represents the concentration of ionized particles in the unit volume of air, and q represents the charge number of ionized particles the concentration of ionized particles can be measured by various experimental means.
Preferably, the method further comprises the following steps:
when the pipeline gas loop is blocked, the main control chip runs through the audible and visual alarm, sends an alarm prompt to the handheld terminal through the communication module and the transmitting module, then disassembles and cleans the pipeline gas loop, retests the gas pressure value after cleaning is completed until the gas pressure value is smaller than the set pressure value, and then continues to detect.
Preferably, the steps further comprise the steps of:
and if the digital signal is smaller than the set value, the digital signal converted by the analog-to-digital conversion module is transmitted to the liquid crystal display screen for display, and the digital signal is transmitted to the handheld terminal through the communication module and the transmitting module, and if the digital signal is larger than or equal to the set value, the main control chip operates through setting the audible-visual alarm, and the digital signal and the alarm prompt are transmitted to the handheld terminal through the communication module and the transmitting module.
Preferably, the gas pressure sensor is in a pressure-sensitive mode, and the audible and visual alarm is a buzzer.
Preferably, when the device is installed in a space with poor air fluidity of the air generating source, the device can be externally connected with an exhaust fan through the main control chip, the air inlet of the exhaust fan is connected with the inner space, and the air outlet is communicated with the outside of the space.
Preferably, when the converted digital signal is larger than the set value, the main control chip controls the audible and visual alarm and the exhaust fan to operate simultaneously, and the exhaust fan operates to exhaust the air in the space.
Compared with the prior art, the invention has the beneficial effects that:
1. when the device is used, if the digital signal is larger than or equal to a set value, the main control chip runs by setting the audible and visual alarm and sends the digital signal and an alarm prompt to the handheld terminal through the communication module and the transmitting module, so that a user can be informed of taking measures as soon as possible, and the message can be transmitted more quickly and safely, thereby controlling the dangerous condition of the pipeline and improving the safety of the device;
2. through setting up air pump and gas pressure sensor, the air pump operation is inhaled the inside of this device with surrounding gas to carry out the gas pressure test to the pipeline gas circuit through gas pressure sensor, if the gas pressure value that detects is greater than the settlement pressure value then judge this pipeline gas circuit and block up, the main control chip is through setting up audible and visual alarm operation at this moment, reminds the user to clear up, is favorable to improving the authenticity and the accuracy of detection data, has improved the life of this device simultaneously;
3. through setting up main control chip and exhaust fan, when using the device, when the digital signal after detecting the gas conversion is greater than the setting value, main control chip is through control audible and visual alarm and exhaust fan simultaneous operation, and the exhaust fan operation can be to the inside gaseous discharge of space, has improved the security of the device.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for the description of the embodiments or the prior art will be briefly described, and it is apparent that the drawings in the following description are only one embodiment of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a three-dimensional structure of the present invention;
FIG. 2 is a schematic view of the present invention in perspective cross-section;
FIG. 3 is a schematic diagram of an operating circuit of the present invention;
FIG. 4 is a schematic illustration of the mechanism of the reaction of the present invention;
the marks in the drawings are:
1. a housing; 2. a power module; 3. a circuit board; 4. a main control chip; 5. an air pump; 6. a gas sensor; 7. an analog-to-digital conversion module; 8. an air inlet pipe; 9. an audible and visual alarm; 10. a communication module; 11. a transmitting module; 12. a liquid crystal display; 13. and a key circuit.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-4, the present invention provides the following technical solutions: the utility model provides a accurate detection device of hand-held type gas transmission pipeline inner wall, includes the collection channel, and this semiconductor sensor carries on in shell 1, contains circuit board 3, power module 2, air pump 5 and gas sensor 6 in the shell 1, and wherein intake pipe 8, air pump 5 and gas sensor 6 communicate in order and constitute VOCs collection channel;
the multifunctional module comprises a main control chip 4 and an analog-to-digital conversion module 7 which are soldered on the surface of a circuit board 3, wherein the main control chip 4, a gas sensor 6 and the analog-to-digital conversion module 7 form a VOCs calculation module, and a power module 2, an audible and visual alarm 9, a communication module 10, a transmitting module 11 and a liquid crystal display 12 are fixedly arranged on the inner part and the outer part of a shell 1, wherein the power module 2, the audible and visual alarm 9, the communication module 10, the transmitting module 11 and the liquid crystal display 12 are respectively combined with the VOCs calculation module to form energy supply, alarm, communication, transmitting and display sub-functions contained in the multifunctional module; and a control module which takes the key circuit 13 as a control main body and performs collection and calculation of the semiconductor sensor.
Specifically, the method comprises the following steps:
step S1: communicating the gas chromatograph with the device to complete detection pretreatment;
step S2: the VOCs collecting channel is driven to work by the control module, so that the VOCs collecting channel sucks gas into the device, and the pipeline gas loop is subjected to blocking test by the gas pressure sensor,
step S21: the operation of the air pump 5 is controlled through the key circuit 13, the air pump 5 is operated to suck air into the device, and the pipeline air loop is tested through the air pressure sensor;
step S22: judging whether the gas passage is blocked or not, and judging that the gas loop of the pipeline is not blocked if the detected gas pressure value is smaller than the set pressure value;
step S3: after the loop blocking test is finished, screening gas, and measuring the gas concentration by utilizing the cooperation of the device and a gas chromatograph, when the pipeline gas loop is not blocked, opening the gas chromatograph, injecting a sample into a chromatographic column through a proper gas path system, controlling the entering amount and the injection time of the sample by using a valve in the gas path system, and separating the sample in the chromatographic column according to respective physical and chemical properties;
step S31: after separation, detecting signals of all components through a detector, amplifying and recording the signals through electronic equipment, and obtaining the concentration of all components in a sample through calculation and analysis according to the measurement principle of the instrument and a calibration curve on the instrument;
step S32: the air pump 5 and the gas sensor 6 are operated to ionize the gas entering the gas sensor 6;
step S33: the actual concentration of the gas is reflected by the ionized ion quantity, and the digital signal is converted by the analog-to-digital conversion module 7, so that the concentration of the detected VOC gas can be intuitively known;
step S4: transmitting the information into the multifunctional module through the VOCs calculation module, and selecting to alarm, communicate, emit and display according to the measured gas concentration and the measured conditions;
step S41: the generated signals are transmitted to an analog-to-digital conversion module 7 for digital signal conversion, and then the generated corresponding digital signals are transmitted to a serial port of the main control chip 4 through an output channel of the conversion chip;
step S42: the main control chip 4 displays the received digital signals in real time through the liquid crystal display 12, and processes and compares the signals.
Specifically, S2 further includes the following steps:
if the detected gas pressure value is larger than the set pressure value, judging that the gas loop of the pipeline is blocked;
the measurement formula according to the amperometric electrochemical gas detector can be expressed as:
I＝KxC
where I is the current intensity, K is a constant, C is the gas concentration, and the current intensity is proportional to the gas concentration;
the measurement formula according to the potential type electrochemical gas detector can be expressed as:
E＝KxlogC
where E is the potential, K is a constant, C is the gas concentration, and the potential is logarithmic with respect to the gas concentration;
the formula of the separation degree C of the gas chromatograph is as follows:
wherein Tr is A And Tr B The corrected retention times, W, of the two components, respectively A And W is B Then their half-widths, respectively;
the theoretical maximum value of the degree of separation C is 1, and in actual operation, it is generally considered that the degree of separation C is 0.9 or more, which has a good separation effect. When the degree of separation C is less than 0.8, then it is generally necessary to employ other columns or optimize the separation conditions;
therefore, the air ionization degree is introduced to satisfy the separation condition, wherein the calculation formula of the air separation degree N is:
N＝nxq
wherein N represents the number of ionized particles in the unit volume of air, N represents the concentration of ionized particles in the unit volume of air, q represents the charge number of ionized particles, and the concentration of ionized particles can be measured by various experimental means;
for example, an ionization chamber may be used to measure the concentration of ionized particles in air, which is a device that can determine the concentration of ionized particles in the ionization chamber by measuring the ionization effect of charged particles in an electric field, where the ionized particles collide with gas molecules in the ionization chamber, thereby forming ionization pairs that are separated by the electric field, and a current signal is generated by measuring the magnitude of the current signal, where the concentration of ionized particles in the ionization chamber can be determined.
Specifically, the method further comprises the following steps:
when the pipeline gas loop is blocked, the main control chip 4 runs by arranging the audible and visual alarm 9, sends an alarm prompt to the handheld terminal through the communication module 10 and the transmitting module 11, then disassembles and cleans the pipeline gas loop, retests the gas pressure value after cleaning is completed until the gas pressure value is smaller than the set pressure value, and then continues to detect in step S3.
Specifically, step S3 further includes the following steps:
if the digital signal is smaller than the set value, the digital signal converted by the analog-to-digital conversion module 7 is transmitted to the liquid crystal display 12 for display, and the digital signal is sent to the handheld terminal through the communication module 10 and the transmitting module 11, and if the digital signal is greater than or equal to the set value, the main control chip 4 runs through setting the audible-visual alarm 9, and sends the digital signal and the alarm prompt to the handheld terminal through the communication module 10 and the transmitting module 11.
Specifically, the gas pressure sensor is in a pressure-sensitive mode, and the audible and visual alarm 9 is a buzzer.
Specifically, when the device is installed in a space with poor air fluidity as the air generating source, the device can be externally connected with an exhaust fan through the main control chip 4, the air inlet of the exhaust fan is connected with the inner space, and the air outlet is communicated with the outside of the space.
Specifically, when the converted digital signal is greater than the set value, the main control chip 4 controls the audible and visual alarm 9 and the exhaust fan to operate simultaneously, and the exhaust fan can operate to exhaust the air in the space.
Finally, it should be noted that: the above is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that the present invention is described in detail with reference to the foregoing embodiments, and modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The hand-held accurate detection device for the inner wall of the gas transmission pipeline is characterized by comprising a collection channel, wherein the semiconductor sensor is carried in a shell (1), the shell (1) is internally provided with a circuit board (3), a power module (2), an air pump (5) and a gas sensor (6), and an air inlet pipe (8), the air pump (5) and the gas sensor (6) are sequentially communicated to form a VOCs collection channel;
the multifunctional module comprises a main control chip (4) and an analog-to-digital conversion module (7) which are soldered on the surface of a circuit board (3), wherein the main control chip (4), a gas sensor (6) and the analog-to-digital conversion module (7) form a VOCs calculation module, and a power module (2), an audible and visual alarm (9), a communication module (10), a transmitting module (11) and a liquid crystal display screen (12) are fixedly arranged on the inner part and the outer part of a shell (1), wherein the power module (2), the audible and visual alarm (9), the communication module (10), the transmitting module (11) and the liquid crystal display screen (12) are respectively combined with the VOCs calculation module to form energy supply, alarm, communication, transmitting and display sub-functions contained in the multifunctional module; and
and the control module takes the key circuit (13) as a control main body and collects and calculates the semiconductor sensor.
2. The accurate detection device for the inner wall of the hand-held gas pipeline and the use method thereof according to claim 1, wherein the accurate detection device comprises the following steps:
step S1: communicating the gas chromatograph with the device to complete detection pretreatment;
step S2: the VOCs acquisition channel is driven to work through the control module, so that the VOCs acquisition channel sucks gas in a pipeline into the device, and a gas pressure sensor is used for conducting blocking test on a pipeline gas loop;
step S21: the air pump (5) is controlled to operate through the key circuit (13), the air pump (5) operates to suck air into the device, and the pipeline air circuit is tested through the air pressure sensor;
step S22: judging whether the gas passage is blocked or not, and judging that the gas loop of the pipeline is not blocked if the detected gas pressure value is smaller than the set pressure value;
step S3: after the loop blocking test is finished, screening gas, and measuring the gas concentration by utilizing the cooperation of the device and a gas chromatograph, when the pipeline gas loop is not blocked, opening the gas chromatograph, injecting a sample into a chromatographic column through a proper gas path system, controlling the entering amount and the injection time of the sample by using a valve in the gas path system, and separating the sample in the chromatographic column according to respective physical and chemical properties;
step S31: after separation, detecting signals of all components through a detector, amplifying and recording the signals through electronic equipment, and obtaining the concentration of all components in a sample through calculation and analysis according to the measurement principle of the instrument and a calibration curve on the instrument;
step S32: the air pump (5) and the gas sensor (6) operate to ionize the gas entering the gas sensor (6);
step S33: the actual concentration of the gas is reflected by the ionized ion quantity, and the digital signal is converted by an analog-to-digital conversion module (7), so that the concentration of the detected VOC gas can be intuitively known;
step S4: transmitting the information into the multifunctional module through the VOCs calculation module, and selecting to alarm, communicate, emit and display according to the measured gas concentration and the measured conditions;
step S41: after the generated signals are transmitted to an analog-to-digital conversion module (7) for digital signal conversion, corresponding digital signals are generated and transmitted to a serial port of a main control chip (4) through an output channel of the conversion chip;
step S42: the main control chip (4) displays the received digital signals in real time through the liquid crystal display screen (12), and processes and compares the signals.
3. The accurate detection device for the inner wall of the hand-held gas transmission pipeline and the use method thereof according to claim 2, wherein the step S2 further comprises the following steps:
if the detected gas pressure value is larger than the set pressure value, judging that the gas loop of the pipeline is blocked;
the measurement formula according to the amperometric electrochemical gas detector can be expressed as:
I＝KxC
where I is the current intensity, K is a constant, C is the gas concentration, and the current intensity is proportional to the gas concentration;
the measurement formula according to the potential type electrochemical gas detector can be expressed as:
E＝KxlogC
where E is the potential, K is a constant, C is the gas concentration, and the potential is logarithmic with respect to the gas concentration;
the formula of the separation degree C of the gas chromatograph is as follows:
wherein Tr is A And Tr B The corrected retention times, W, of the two components, respectively A And W is B Then their half-widths, respectively;
the theoretical maximum value of the degree of separation C is 1, and in actual operation, it is generally considered that the degree of separation C is 0.9 or more, which has a good separation effect. When the degree of separation C is less than 0.8, then it is generally necessary to employ other columns or optimize the separation conditions;
therefore, the air ionization degree is introduced to satisfy the separation condition, wherein the calculation formula of the air separation degree N is:
N＝nxq
where N represents the number of ionized particles in the unit volume of air, N represents the concentration of ionized particles in the unit volume of air, and q represents the charge number of ionized particles the concentration of ionized particles can be measured by various experimental means.
4. The accurate detection device for the inner wall of the hand-held gas pipeline and the use method thereof according to claim 3, further comprising the following steps:
when the pipeline gas loop is blocked, the main control chip (4) runs through the audible and visual alarm (9) and sends an alarm prompt to the handheld terminal through the communication module (10) and the transmitting module (11), then the pipeline gas loop is disassembled and cleaned, the gas pressure value is retested after the cleaning is finished until the gas pressure value is smaller than the set pressure value, and then the detection is carried out in the step S3.
5. The accurate detection device for the inner wall of the hand-held gas pipeline and the use method thereof according to claim 2, wherein the step S3 further comprises the steps of:
if the digital signal is smaller than the set value, the digital signal converted by the analog-to-digital conversion module (7) is transmitted to the liquid crystal display screen (12) for display, and the digital signal is sent to the handheld terminal through the communication module (10) and the transmitting module (11), and if the digital signal is larger than or equal to the set value, the main control chip (4) operates by setting the audible-visual annunciator (9), and sends the digital signal and the alarm prompt to the handheld terminal through the communication module (10) and the transmitting module (11).
6. The accurate detection device for the inner wall of the hand-held gas pipeline and the use method thereof according to claim 2, wherein the accurate detection device is characterized in that: the gas pressure sensor is in a pressure-sensitive mode, and the audible and visual alarm (9) is a buzzer.
7. The accurate detection device for the inner wall of the hand-held gas pipeline and the use method thereof according to claim 2, wherein the accurate detection device is characterized in that: when the device is installed in a space with poor air fluidity, the device can be externally connected with an exhaust fan through a main control chip (4), the air inlet of the exhaust fan is connected with the inner space, and the air outlet is communicated with the outside of the space.
8. The accurate detection device for the inner wall of the hand-held gas pipeline and the use method thereof according to claim 2, wherein the accurate detection device is characterized in that: when the converted digital signal is larger than the set value, the main control chip (4) controls the audible and visual alarm (9) and the exhaust fan to operate simultaneously, and the exhaust fan can be operated to exhaust the air in the space.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311707046.2A CN117705972A (en) | 2023-12-12 | 2023-12-12 | Accurate detection device of hand-held type gas transmission pipeline inner wall |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311707046.2A CN117705972A (en) | 2023-12-12 | 2023-12-12 | Accurate detection device of hand-held type gas transmission pipeline inner wall |
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| CN117705972A true CN117705972A (en) | 2024-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202311707046.2A Pending CN117705972A (en) | 2023-12-12 | 2023-12-12 | Accurate detection device of hand-held type gas transmission pipeline inner wall |
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| Country | Link |
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| CN (1) | CN117705972A (en) |
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