CN117351662A - Laser gas alarm and portable performance self-detection method thereof - Google Patents
Laser gas alarm and portable performance self-detection method thereof Download PDFInfo
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- CN117351662A CN117351662A CN202311659880.9A CN202311659880A CN117351662A CN 117351662 A CN117351662 A CN 117351662A CN 202311659880 A CN202311659880 A CN 202311659880A CN 117351662 A CN117351662 A CN 117351662A
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- 238000001514 detection method Methods 0.000 title claims abstract description 145
- 230000001960 triggered effect Effects 0.000 claims abstract description 10
- 230000002159 abnormal effect Effects 0.000 claims description 9
- 238000012360 testing method Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 131
- 239000002737 fuel gas Substances 0.000 description 8
- 238000009434 installation Methods 0.000 description 8
- 239000002341 toxic gas Substances 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 230000001629 suppression Effects 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- NNPPMTNAJDCUHE-UHFFFAOYSA-N isobutane Chemical group CC(C)C NNPPMTNAJDCUHE-UHFFFAOYSA-N 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000001282 iso-butane Substances 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
- G08B21/16—Combustible gas alarms
-
- 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
- G08B21/14—Toxic gas alarms
-
- 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
- G08B21/18—Status alarms
- G08B21/24—Reminder alarms, e.g. anti-loss alarms
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
- G08B29/12—Checking intermittently signalling or alarm systems
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B3/00—Audible signalling systems; Audible personal calling systems
- G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Environmental & Geological Engineering (AREA)
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- Computer Security & Cryptography (AREA)
- Electromagnetism (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The application relates to the technical field of gas detection alarm, in particular to a laser gas alarm and a portable performance self-detection method thereof, which comprises the following steps: a housing, on which a gas collection hole communicating with an external environment is formed; the acquisition module is arranged in the shell, forms a laser detection channel and is communicated with the gas acquisition hole; the alarm module is arranged in the shell and is electrically connected with the acquisition module, and when the acquired gas concentration is within the set threshold value range, an alarm is triggered; the self-checking module comprises a transparent vessel which is arranged in the shell in a sliding manner, gas after concentration calibration is sealed in the transparent vessel, and the transparent vessel can be moved into the laser detection channel for checking an alarm. The application has the effect of being convenient for the detection of gas alarm.
Description
Technical Field
The application relates to the technical field of gas detection and alarm, in particular to a laser gas alarm and a portable performance self-detection method thereof.
Background
At present, fuel gas is increasingly popular in common people, and the generated fuel gas accidents are frequent. The fuel gas alarm with excellent quality plays an important role in the discovery and the treatment of fuel gas leakage accidents. At present, the sensing principle of the gas alarm is various, the sensing characteristic difference is large, the quality difference is also large, the sensor with low quality can lose sensing performance when being used for a long time, but a user does not know, so that the gas alarm can be normally used as long as the gas alarm can be normally lightened, and in fact, the alarm has lost the alarming function at the moment, so that accidents can possibly happen.
Therefore, the relevant standard requires that the gas filling detection is carried out after the gas alarm is used for a period of time so as to verify that the gas alarm has a gas leakage alarm function, and the relevant performance index is in an effective range.
The current common detection method is to carry pressure gas cylinders (generally 4 liters or 8 liters and tens of atmospheric pressure) with different concentrations, release gas to a gas alarm, and detect whether the alarm responds to the gas in the environment; the mode is time-consuming and labor-consuming, and the user's look and feel is influenced by releasing corresponding gas at the user's home, and on the other hand, the pressure gas cylinder belongs to the pressure container, has strict storage and transportation management, and gas transportation and storage are inconvenient.
Disclosure of Invention
The use of laser technology for gas detection is already mature technology, but for the on-site detection of a gas alarm adopting laser technology, the traditional gas filling detection method is still used at present, the gas alarm is covered/submerged by releasing target gas into the air, and the gas alarm alarms by detecting or sensing that the gas concentration in a certain range around exceeds the standard. The detection of the product still needs professional to be realized, so that the detection of convenience can be carried out on the gas alarm by a common user, the detection cost is reduced, and the laser gas alarm and the portable performance self-detection method thereof are provided.
In a first aspect, the present application provides a laser gas alarm, which adopts the following technical scheme:
a laser gas alarm comprising:
a housing, on which a gas collection hole communicating with an external environment is formed;
the acquisition module is arranged in the shell, forms a laser detection channel and is communicated with the gas acquisition hole;
the alarm module is arranged in the shell and is electrically connected with the acquisition module, and when the acquired gas concentration is within the set threshold value range, an alarm is triggered;
the self-checking module comprises a transparent vessel which is arranged in the shell in a sliding manner, gas after concentration calibration is sealed in the transparent vessel, and the transparent vessel can be moved into the laser detection channel for checking an alarm.
By adopting the technical scheme, when the alarm is used for periodically detecting whether the alarm is effective, the self-checking module drives the transparent vessel with the standard gas to slide into the laser detection channel, the acquisition module detects the standard gas concentration signal in the transparent vessel, and the alarm module is used for alarming because the standard gas in the transparent vessel is the set concentration of the alarm, if the alarm is not given, the alarm is in an abnormal working state, accurate monitoring and alarming can not be carried out when household gas leaks, the alarm is lost to detect the gas leakage, and then a gas company professional is informed of maintenance when the household gas leaks; by the arrangement of the self-checking module, the technical barrier is reduced, so that common people can also check the self-home alarm to ensure that the alarm can be normally used, reduce the probability of the detection of the professional detector for entering the home, on one hand, reduce the labor cost, improve the working efficiency and reduce the labor cost for requesting the professional detector for entering the home; on the other hand, the possibility that a plurality of gas tanks are needed to be carried because the user does not know what type of alarm is used when the professional inspector enters the home for detection can be reduced, the burden of the professional inspector is reduced, and the detection gas released in the home of the user can be effectively reduced, so that the user can have opinion and standard operation; on the other hand, because the concentration of the standard gas in the container is known, the concentration of the household alarm can be clearly known, and the self-checking accuracy is further improved.
Optionally, the acquisition module includes:
the mounting block is arranged in the shell, and the laser detection channel is formed on the mounting block;
the laser collector is arranged on the laser detection channel, and the transmitting end and the receiving end are respectively positioned at two ends of the laser detection channel and form a detection area.
By adopting the technical scheme, when the alarm is normally used, leaked fuel gas or other toxic gas enters the laser detection channel through the acquisition hole, the laser acquisition device emits laser to detect the gas concentration, and judges whether the gas concentration is within the alarm threshold range or not, and the alarm module is controlled to alarm; when self-checking is carried out, the container is placed in the laser detection channel, the emitting end of the laser collector emits laser to penetrate through standard gas in the container and then is received by the receiving end, the corresponding concentration is detected, whether the laser is located in the alarm threshold range or not is judged, the alarm module is controlled to alarm, when the alarm alarms, the alarm is indicated to work normally, if the alarm does not alarm, the alarm is indicated to work abnormally, the valve is closed, the special detection personnel is waited to go to the gate for verification, and the alarm is replaced; the collection module is simple in structure and adopts a laser mode, so that the precision and stability of the equipment are improved, and the occurrence of explosion accidents is reduced.
Optionally, the self-checking module includes:
the accommodating block is arranged in the shell to form an accommodating space, and the transparent vessel is accommodated in the space and can slide into the laser detection channel;
and the sliding component is arranged on the accommodating block and connected with the transparent vessel and is used for driving the transparent vessel to enter or slide out of the laser detection channel.
By adopting the technical scheme, when self-checking is carried out, the sliding component is used for driving the transparent vessel to slide out along the accommodating space of the accommodating block, so that the transparent vessel with standard concentration moves into the laser detection channel, then the transmitting end of the laser collector transmits laser to pass through standard gas in the container and then to be received by the receiving end, the corresponding concentration is detected, whether the laser is positioned in the alarm threshold range is judged, the alarm module is controlled to alarm, when the alarm alarms, the alarm is indicated to work normally, if the alarm does not alarm, the alarm is indicated to work abnormally, the valve is closed, the special detection personnel go to the gate to check and the alarm is replaced; through the transparent vessel, the standard gas is sealed inside, so that on one hand, the frequency of the on-door detection of professional detection personnel is reduced, the detection cost is reduced, any person can perform the self-detection of the alarm, the detection efficiency is improved, and meanwhile, the safety performance of the alarm is improved; on the other hand, through the sealed transparent vessel, each alarm corresponds to standard gas with corresponding alarm concentration, so that the self-detection result is more accurate, the leakage of detection gas can be reduced, and the detection environment is safer; on the other hand, through the built-in transparent vessel, the damage of the transparent vessel can be effectively reduced, the leakage of standard gas is reduced, and the detection precision is kept.
Optionally, the slip assembly includes:
the fixing rings are arranged at two ends of the transparent vessel and are positioned at the outer side of the transparent vessel;
the guide rod is arranged on the fixed ring, and the fixed ring slides on the accommodating block through the guide rod;
the pressing piece is movably arranged on the accommodating block, is connected with the guide rod and drives the guide rod to slide;
the driving piece is arranged on the accommodating block and used for driving the pressing piece to move.
By adopting the technical scheme, when the alarm self-checking is carried out, the driving piece is used for driving the pressing piece to move, the pressing piece drives the guide rod to slide, the guide rod is provided with the fixing ring to slide, and the fixing ring drives the transparent vessel to move into the laser detection channel; the sliding assembly is simple in structure, when the alarm works normally, the transparent vessel is located on one side of the laser detection channel, so that the device works normally, the sliding mode is simple, the sliding assembly is suitable for any person to operate, the technical content is reduced, and self-detection is convenient.
Optionally, a sensor is disposed on the accommodating block, when performing self-detection, the pressure plate triggers the sensor, and the sensor is electrically connected with the alarm module to trigger a detection sound of "self-detection" and is used for calculating the trigger duration.
By adopting the technical scheme, when self-checking is carried out, the movable pressing piece drives the guide rod and the fixed ring to slide, after the fixed ring drives the transparent vessel to reach the laser detection channel, the pressing piece and the sensor trigger to send out detection sound to remind that the detection work is started, timing or automatic timing of equipment can be carried out, if no alarm is triggered in the appointed time, the alarm is abnormal in work and leakage of toxic gas cannot be found in time, and a professional detector needs to be reported to enter a household for detection to replace a new alarm; the sensor can remind whether the container filled with standard gas is in place or not when detecting, and can discharge detection errors caused by inaccurate container positions, so that the self-detection result is more accurate.
Optionally, a convex lens is disposed at one end of the transparent vessel far away from the emitting end.
Through adopting above-mentioned technical scheme, can exist certain scattering after the transmitting end of laser acquisition ware passes through transparent household utensils, through the setting of convex lens for scattered light concentrates once more, and then makes laser detection result keep, reduces the variable, makes the self-checking result more accurate.
In a second aspect, the present application provides a portable performance self-detection method for a laser gas alarm, which adopts the following technical scheme:
a portable performance self-detection method of a laser gas alarm comprises the following steps:
acquiring a self-checking instruction;
based on the self-checking instruction, driving a container of standard gas with specified concentration to enter a detection space for detection;
judging whether the detected concentration is greater than a set alarm threshold, if so, triggering an alarm, and if not, not triggering an alarm, wherein the equipment is abnormal;
after the detection is completed, the container with the standard gas is withdrawn, so that the alarm works normally.
By adopting the technical scheme, the self-checking instruction is acquired, a professional detector can regularly remind a user, equipment can also be automatically timed, then a container of standard gas with specified concentration is pushed into a detection space, then the gas concentration in the container is detected, the equipment automatically judges whether an alarm threshold is met or not, if yes, an alarm is triggered, an alarm sound is heard, and the alarm is normally operated and can be normally used; if the alarm is not triggered, the problem of the equipment is indicated, the problem of detection precision is possibly caused, the equipment is also possibly completely damaged, and professional detection personnel are notified to carry out detection; through the steps, the detection can be carried out at home by oneself, the detection of a professional detector is not required, the detection cost is reduced, meanwhile, the detection efficiency of the professional detector can be improved, and the abnormal user can be accurately positioned.
Optionally, before the self-checking instruction is acquired, the method further includes:
and periodically sending a self-checking information prompt to perform self-checking work.
Through adopting above-mentioned technical scheme, through the mode of regularly reminding, remind to carry out the self-checking, ensure in certain life cycle, the normal operating of equipment can effectively reduce the explosion emergence that toxic gas leaked and lead to, can reduce the hourglass of manual self-checking simultaneously for self-checking work goes on time.
Optionally, the container is cylindrical, square or truncated cone-shaped, and the interior is sealed and filled with gas to be detected with specified concentration, so as to simulate the state that the gas to be detected leaks to reach the specified concentration.
By adopting the technical scheme, in life, the sensor self-detection is generally carried out by using a lighter to test the gas alarm, and the gas alarm is wrong and not strict, so that the gas detection function of the product is lost when serious; the gas component of the lighter is isobutane and is not the target test gas of the natural gas alarm; the concentration of the gas is uncontrollable, and the high concentration gas can possibly cause an alarm to alarm, but cannot prove that the alarm can occur in a reasonable range of the target gas; high concentration gas may cause disposable failure of the product; the method comprises the steps of releasing certain fuel gas from a fuel gas pipeline into a plastic bag, and then placing a product into the plastic bag for gas concentration simulation, wherein the two modes respectively fill a detection channel of a sensor or completely cover the sensor with the gas, so that the risk of gas leakage exists or the detection is inaccurate; in the laser detector field, this technical scheme is through the mode of container seal gas for the gas to be detected of appointed concentration is located in specific container and is used for the simulation to detect gas concentration, on the one hand can reduce the gas and leak in the air, reduces user's dissatisfaction, on the other hand, gas concentration is specific, the condition that concentration is too low or too high can not appear, makes the self-test result more accurate, reduces the alarm continuous operation that can not normal operating because of detecting the problem leads to appearing user's family gas leakage and does not report to the police the condition.
In summary, the present application includes the following beneficial technical effects:
1. by the arrangement of the self-checking module, the technical barrier is reduced, so that common people can also check the self-home alarm to ensure that the alarm can be normally used, reduce the probability of the detection of the professional detector for entering the home, on one hand, reduce the labor cost, improve the working efficiency and reduce the labor cost for requesting the professional detector for entering the home; on the other hand, the possibility that a plurality of gas tanks are needed to be carried because the user does not know what type of alarm is used when the professional inspector enters the home for detection can be reduced, the burden of the professional inspector is reduced, and the detection gas released in the home of the user can be effectively reduced, so that the user can have opinion and standard operation; on the other hand, because the concentration of the standard gas in the container is known, the concentration of the household alarm can be clearly known, and the self-checking accuracy is further improved;
2. when self-checking is carried out, the movable pressing piece drives the guide rod and the fixed ring to slide, after the fixed ring moves the transparent vessel to reach the laser detection channel, the pressing piece and the sensor trigger to send out detection sound to remind that the detection work is started, timing can be carried out or equipment is automatically timed, if no alarm is triggered in a specified time, the alarm is abnormal in work and leakage of toxic gas can not be found in time, a professional detector needs to be reported to enter the home for detection, and a new alarm is replaced; the sensor can remind whether the container is in place or not during detection, and can discharge detection errors caused by inaccurate container positions, so that a self-detection result is more accurate;
3. through the mode of regularly reminding, remind to carry out the self-checking, ensure in certain life cycle, the normal operating of equipment can effectively reduce the explosion emergence that toxic gas leaked and lead to, can reduce the hourglass of manual self-checking simultaneously for self-checking work is punctual.
Drawings
FIG. 1 is a schematic diagram of a laser gas alarm in embodiment 1 of the present application;
FIG. 2 is a diagram showing the installation position of the self-test module in embodiment 1 of the present application;
fig. 3 is a schematic structural diagram of an acquisition module in embodiment 1 of the present application;
FIG. 4 is a diagram showing the position of a pressure plate in example 1 of the present application;
FIG. 5 is a cross-sectional view of the accommodation block in embodiment 2 of the present application;
FIG. 6 is an explanatory view showing the mounting position of the driving member in embodiment 2 of the present application;
fig. 7 is an exploded view of the driving member in embodiment 2 of the present application.
Reference numerals: 100. a housing; 110. a collection hole; 200. an acquisition module; 210. a mounting block; 211. a laser detection channel; 220. a laser collector; 221. a transmitting end; 222. a receiving end; 400. a self-checking module; 410. a receiving block; 420. a transparent vessel; 430. a slip assembly; 431. fixing rings; 432. a guide rod; 433. a pressing plate; 434. pressing a column; 440. a driving member; 441. a first return spring; 442. a dust suppression plate; 443. a driving block; 445. a second return spring; 446. a guide block; 447. a rotating block; 448. a cylinder barrel; 449. a stopper; 470. a connecting plate; 481. a driving groove; 482. a first guide surface; 483. a guide groove; 484. a chute; 485. a clamping groove; 486. a pushing groove; 487. and a second guide surface.
Detailed Description
The present application is described in further detail below in conjunction with fig. 1-7.
The embodiment of the application discloses a laser gas alarm.
Example 1:
referring to fig. 1 and 2, the laser gas alarm includes a housing 100, an acquisition module 200 disposed in the housing 100 for acquiring gas concentration, an alarm module disposed in the housing 100 for judging alarm according to the concentration of the acquisition module 200, and a self-checking module 400 disposed in the housing 100 for simulating gas alarm concentration, when performing self-checking of the device, the self-checking module 400 simulates gas alarm concentration, so that the acquisition module 200 acquires, and then performs alarm or does not alarm through judgment of the alarm module, when the alarm is given, the normal operation of the device is indicated, when the alarm is not given, the abnormal operation of the device is indicated, and professional detection personnel can be notified to go to the door for detection maintenance.
Referring to fig. 2 and 3, an installation cavity is formed in the housing 100, the collection module 200 includes an installation block 210 fixedly connected to an inner wall of the installation cavity by a bolt, a laser detection channel 211 is formed on the installation block 210, a collection hole 110 communicated with the laser detection channel 211 is formed on an outer sidewall of the housing 100, and when toxic gas leaks from the outside, the gas enters the laser detection channel 211 through the collection hole 110; the laser detection channel 211 is fixedly connected with a laser collector 220, a transmitting end 221 and a receiving end 222 of the laser collector 220 are respectively positioned at two ends of the laser detection channel 211 to form a detection area, and the laser collector 220 is electrically connected with an alarm module.
The alarm module comprises a controller, a buzzer and an alarm indicator lamp which are fixedly connected in the installation cavity through bolts, and the controller is electrically connected with the buzzer and the alarm indicator lamp; after the laser collector 220 transmits the concentration signal to the controller, the controller controls the concentration to be compared with the preset value all the time through the judging unit, then judges whether the concentration falls into the alarm threshold range, and when the concentration falls into the alarm threshold range, the controller controls the buzzer to sound and controls the alarm indicator lamp to light, so that the concentration is over standard, and the valve is closed.
Referring to fig. 3 and fig. 4 and fig. 5, the self-checking module 400 includes a receiving block 410 fixedly connected to a side wall of the mounting cavity far away from the mounting block 210 by a bolt, the receiving block 410 is abutted to the mounting block 210, and a receiving space is formed on the side wall close to the mounting block 210, and the receiving space is communicated with the laser detection channel 211; a transparent vessel 420 is placed in the accommodating space, the transparent vessel 420 is transparent glass which is convenient for laser to pass through, the inside is filled with detection gas with alarm set concentration to form standard gas, the transparent vessel 420 is integrally formed or the side wall in the width direction is provided with an air inlet hole which is sealed by a rubber plug; the accommodating space is internally provided with a sliding component 430, and the transparent vessel 420 slides in the accommodating space through the sliding component 430 and can slide from the accommodating space into the laser detection channel 211, so that the transparent vessel 420 is positioned between the transmitting end 221 and the receiving end 222 of the laser collector 220.
The laser can penetrate through the transparent container and still generate optical response (TDLAS) to specific gas in the transparent container, and the gas concentration is alarmed by detecting the received light and performing data analysis processing; TDLAS is a principle for gas detection that uses the tunability of laser light and the absorption characteristics of gas molecules to determine the concentration of gas by measuring the absorption intensity of laser light; the principle of TDLAS is based on spectroscopy, i.e. analysing the concentration of a molecule by measuring its absorption of light of a specific wavelength; in TDLAS systems, a beam of monochromatic laser light is produced by a tunable semiconductor laser whose output wavelength can be precisely tuned; the laser beam passes through an optical element to form a narrow bandwidth, high power laser beam; the laser beam then passes through a gas chamber to interact with the gas to be measured. As the laser beam passes through the gas, the gas molecules absorb light of a particular wavelength; this particular wavelength is typically related to the vibrational or rotational energy level of the molecule; by measuring the difference in absorption intensity of the laser beam before and after passing through the gas chamber, the concentration of the gas can be calculated; the measuring method has high precision and high sensitivity, and can detect the gas with extremely low concentration.
In order to reduce scattering of laser light by the transparent vessel 420, a convex lens is integrally formed at one end of the transparent vessel 420 away from the emitting end 221 of the laser collector 220, and in order to further reduce scattering, convex lenses may be formed at both ends of the transparent vessel 420.
The slip assembly 430 includes two rings 431 bonded to opposite ends of the transparent vessel 420. Depending on the actual process, shallow grooves may be selectively formed in the transparent vessel 420 such that the rings 431 are located in the shallow grooves or directly bonded to the transparent vessel 420. The fixed ring 431 is semi-annular, two ends of the fixed ring 431 are respectively and fixedly connected with a guide rod 432, the guide rods 432 extend towards the mounting block 210, a sliding groove 484 communicated with the accommodating space is formed in the mounting block 210, and the guide rods 432 are connected in the sliding groove 484 in a sliding manner; a limit groove is formed in the sliding groove 484, a limit plate is slidably connected in the limit groove, and a driving piece 440 is arranged between the limit plate and the sliding groove 484.
The driving member 440 includes a first reset spring 441 sleeved on the guide rod 432 and fixedly connected to the limiting plate, where the first reset spring 441 drives the limiting plate to be far away from the laser detection channel 211; the four guide rods 432 are connected with a connecting plate 470 together, and the connecting plate 470 is positioned on one side of the accommodating block 410 away from the mounting block 210; the shell 100 is provided with a sliding groove 484 communicated with the installation cavity, the sliding groove 484 is slidably connected with a pressing piece, the pressing piece is a plate-shaped pressing plate 433, the pressing plate 433 protrudes out of the shell 100 to form an anti-slip part which is convenient to push, the inner wall of the installation cavity is fixedly connected with connecting blocks, the connecting blocks are provided with two connecting blocks and are positioned at two ends of the sliding groove 484, the side walls of the connecting blocks, which are close to each other, are provided with sliding holes, the sliding holes are slidably connected with a dust suppression plate 442, and the dust suppression plate 442 is fixedly connected with the pressing plate 433 and slides along with the pressing plate 433; the sides of the two dust suppression plates 442 far away from the connecting plate 470 are respectively marked with a sample to be inspected and a finished sample to be inspected, and the inspected marks are red and the finished marks are green; the pressing plate 433 is fixedly connected with a driving block 443, the driving block 443 is perpendicular to the pressing plate 433, a driving groove 481 for the driving block 443 to pass through is formed in the connecting plate 470, one end of the driving block 443 passes through the driving groove 481 and can relatively displace with the connecting plate 470, a first guide surface 482 is formed in one side, close to the detected character, of the driving block 443, the first guide surface 482 is abutted with the driving groove 481, one side, far away from the pressing plate 433, of the first guide surface 482 is inclined towards one side, close to the detected character, of the pressing plate 433, when the pressing plate 433 is pushed to slide, the first guide surface 482 and the driving groove 481 relatively slide, so that the connecting plate 470 moves downwards, and further the guide rod 432 and the solid ring 431 are driven to slide, and the transparent vessel 420 enters the laser detection channel 211.
In order to facilitate judging whether the transparent vessel 420 is pushed in place, one end of the length direction of the sliding chute 484 is provided with a sensor, the sensor is a trigger type sensor, when the pressing plate 433 slides to one end of the sliding chute 484, the pressing plate 433 is abutted against the sensor and sends a signal to the controller, the controller controls the buzzer to send out a prompt tone, a timer can be arranged on the alarm, after the sensor is triggered, the controller controls the timer to start timing, and if no alarm reminding is sent out within one minute, the alarm cannot work normally.
In order to facilitate the visual working state, a power indicator, a self-checking indicator, a fault indicator, an alarm indicator and a life indicator may be installed on the housing 100, and the indicators may be electrically connected to the controller, and the controller may control the lighting thereof according to the working state.
The implementation principle of embodiment 1 of the present application is: the alarm is powered on, a user slides the pressing plate 433, the pressing plate 433 slides along the sliding groove 484, the pressing plate 433 triggers the sensor, the sensor controls the buzzer to send out detection prompt sound through the controller, and meanwhile, the timer starts timing, so that the detection duration is more visual; the pressing plate 433 drives the driving block 443 to slide, the driving block 443 drives the connecting plate 470 to slide, the connecting plate 470 drives the guide rod 432 to slide, the guide rod 432 drives the fixed ring 431 to move downwards, the fixed ring 431 drives the transparent vessel 420 to approach towards the laser detection channel 211 until the transparent vessel 420 enters the laser detection channel 211, at the moment, the pressing plate 433 stops in the sliding groove 484 under the action of friction force, the pressing plate 433 is released, and the transparent vessel 420 stops in the laser detection channel 211; the transmitting end 221 of the laser collector 220 transmits laser to pass through the transparent vessel 420 and then is received by the receiving end 222, and the concentration signal is transmitted to the controller, the controller judges whether the concentration signal is positioned in an alarm threshold value, if yes, the buzzer is controlled to sound for reminding that the test is normal, and the alarm can be used normally; if not, the alarm is not triggered, after one minute, the user can slide the pressing plate 433 to move to the initial position, the first reset spring 441 drives the limiting plate, the guide rod 432 and the transparent vessel 420 to be far away from the laser detection channel 211, and then the professional detector is informed to enter the home for maintenance and to replace a new alarm.
Example 2:
referring to fig. 6 and 7, the present embodiment is different from embodiment 1 in that the pressing member is a pressing post 434 sliding in the sliding chute 484 in the vertical direction, the driving member 440 includes a second return spring 445 sleeved on the guide rod 432, and the second return spring 445 is connected with the limiting plate and pushes the limiting plate away from the connecting plate 470; the connecting plate 470 is rotationally connected with a rotating block 447, the rotating block 447 is a cylindrical block, a plurality of guide blocks 446 are formed on the peripheral side wall of the cylindrical block, one ends of the guide blocks 446, which are far away from the connecting plate 470, are provided with second guide surfaces 487, and one ends of the second guide surfaces 487, which are far away from the connecting plate 470, are inclined towards a circumferential direction; the shell 100 is fixedly connected with a cylinder 448, the cylinder 448 corresponds to and is communicated with the sliding groove 484, one end of the cylinder 448, which is far away from the shell 100, is provided with a plurality of clamping grooves 485, the clamping grooves 485 are matched with the end parts of the guide blocks 446 forming the second guide surface 487, a guide groove 483 is arranged between the two clamping grooves 485, the guide groove 483 extends to the inner wall of the shell 100, and the outer diameter of the guide block 446 is larger than the outer diameter of the pressing column 434, so that the guide block 446 slides into the guide groove 483 and slides along the guide groove 483; the guide groove 483 is slidably connected with a stop block 449, and a plurality of stop blocks 449 are fixedly connected with the pressing column 434 and are arranged at equal intervals along the circumferential direction of the pressing column 434; a pushing groove 486 is formed in one end, close to the guide block 446, of the pressing column 434, and the number of the pushing grooves 486 is the sum of the number of the clamping grooves 485 and the number of the guide grooves 483; the section of the pushing groove 486 is V-shaped, and one end of the guiding block 446 provided with the second guiding surface 487 can be inserted into the pushing groove 486, one side wall of the guiding block is matched with the second guiding surface 487, and two connected pushing grooves 486 form a tip part coaxial with the guiding groove 483.
In order to facilitate the reset of the pressing post 434, a third reset spring may be sleeved on the outer side of the cylinder 448, and the third reset spring is connected with the stop block 449 and drives the stop block 449 to slide in a direction away from the connecting plate 470.
The sensor is located the tank bottom of joint groove 485, and when guide block 446 is located joint groove 485, triggers the sensor, and the controller received the sensor signal control buzzer and sent the detection prompt tone.
The implementation principle of embodiment 2 of the present application is: the alarm is powered on, the user presses the pressing column 434, the pressing column 434 slides along the sliding groove 484, the pressing column 434 drives the third reset spring to stretch, meanwhile, the stop block 449 is driven to slide along the guide groove 483, the pressing column 434 drives the rotating block 447 to slide along with the sliding of the guide block 446 and separate from the guide groove 483, the guide block 446 moves into the pushing groove 486, the guide block 446 is driven to slide along the inclined surface of the pushing groove 486 and rotate the guide block 446 until the second guide surface 487 of the guide block 446 completely enters the pushing groove 486, then the pressing column 434 is released, the second reset spring 445 drives the connecting plate 470 to move upwards, the connecting plate 470 drives the guide block 446 to move upwards, the guide block 446 drives the pressing column 434 to move upwards and abut against the side wall of the clamping groove 485 and enter the clamping groove 485 to trigger the sensor, the sensor controls the buzzer to send detection prompt sound through the controller, and the timer starts timing at the same time, so that the detection time length is more visual; at this time, the transparent vessel 420 enters the laser detection channel 211 and is centered with the laser collector 220, the transmitting end 221 of the laser collector 220 transmits laser to pass through the transparent vessel 420 and then is received by the receiving end 222, and the concentration signal is transmitted to the controller, the controller judges whether the concentration signal is positioned in the alarm threshold, if yes, the buzzer is controlled to sound for reminding that the test is normal, and the alarm can be normally used; if not, the alarm is not triggered, after one minute, the user can slide down the pressing column 434 again, the third reset spring stretches, meanwhile, the stop block 449 is driven to slide along the guide groove 483, the pressing column 434 drives the guide block 446 to be far away from the clamping groove 485, after the guide block 446 is completely separated from the clamping groove 485, the guide block 446 slides along the inclined surface of the pushing groove 486 and enables the guide block 446 to rotate, the pressing column 434 is released, the guide block 446 slides into the guide groove 483 under the driving of the second reset spring 445, slides along the guide groove 483, the transparent vessel 420 slides out of the laser detection channel 211, and then a professional detector is informed of maintenance and replacement of a new alarm.
The embodiment of the application also discloses a portable performance self-detection method of the laser gas alarm.
The portable performance self-detection method of the laser gas alarm comprises the following steps:
s110, periodically sending self-checking information reminding to perform self-checking work;
specifically, a program or a timing component is arranged in the controller to periodically inform a user of the need of self-checking work, or a network module is arranged in the alarm to acquire the Internet time and send periodic self-checking information to the user and a gas company in a wireless mode to remind the user of self-checking; the buzzer can be arranged to give out prompt tone to remind the user of carrying out detection work, or the professional detector can record the working time of the alarm, and the user is reminded to carry out self-checking work in a short message or telephone visit mode at regular time.
S120, acquiring a self-checking instruction;
specifically, the self-checking instruction can be that a professional of the gas company periodically notifies the user of telephone or short message to perform self-checking, or the self-checking instruction reminds the user in a timing manner through a timing function.
S130, based on a self-checking instruction, driving a container filled with standard gas with specified concentration into a detection space for detection;
specifically, when the concentration of standard gas in the container is the set concentration of the alarm and the error is between plus and minus one percent when the alarm leaves a factory, the standard gas with specific concentration is sealed and enters the transparent container, a user manually pushes the container into the laser detection channel for self-checking, and the container filled with the standard gas can be driven by automatic control equipment to enter the laser detection channel, so that the corresponding cost is increased;
specifically, filling a transparent container with a gas to be detected with a specific concentration, and simulating a state that the gas to be detected leaks to reach the specific concentration; the transparent container can be a transparent vessel with good laser penetrability, such as a glass bottle, a plastic bottle and the like, is filled with gas with specific concentration, is sealed, and records the gas concentration and the gas type; considering that the transparent container still has the loss to the laser, when the gas with specific concentration is sealed, the gas concentration in the container detected is compared with the gas concentration filled and recorded when the gas with specific concentration is detected actually by the simulated laser gas alarm, and the actually detected concentration is used as the concentration of the standard gas for detecting the standard gas of the gas alarm with alarm in the concentration range; the transparent container can be cylindrical, square or truncated cone-shaped, and the two ends of the transparent container are provided with planes, so that the loss of laser is reduced, and the detection precision is improved; the transparent container is small in size and miniaturized, and is convenient to carry and detect.
S140, judging whether the detection concentration is larger than a set alarm threshold, if so, triggering an alarm, and if not, not triggering the alarm, and if not, the equipment is abnormal;
specifically, the emission end of the laser collector emits laser to penetrate through the transparent vessel to detect the gas concentration, the gas concentration is sent to the alarm module, the controller of the alarm module compares the designed concentration threshold range of the alarm with the detection concentration, when the detection concentration is located in the designed concentration threshold range of the alarm, the controller controls the buzzer to alarm, the working state of the alarm is normal, if the alarm is not located in the designed concentration threshold range, and the alarm is not alarm, so that the alarm is abnormal in working, a professional of a gas company needs to be informed to go to the gate for maintenance, and the workload of the professional detector for carrying out self-detection on all users regularly is reduced.
And S150, after the detection is completed, the container with the standard gas is withdrawn, so that the alarm works normally.
Specifically, taking the transparent vessel filled with the gas with standard concentration out of the laser detection channel, and reducing the continuous alarm of the alarm; the exit mode can adopt manual exit or automatic control exit.
The implementation principle of the portable performance self-detection method of the laser gas alarm provided by the embodiment of the application is as follows: the self-checking work is carried out by reminding the user regularly, the user pushes the container containing the standard gas into the laser detection channel, the running state of the alarm is verified, the self-checking of equipment is facilitated, the time waste caused by the fact that professional detection personnel of a gas company visit the user next is reduced, the time for entering the home is longer, and the user is possibly not at home, so that the detection efficiency is reduced; the method is simple to operate and low in cost, so that non-professional personnel can complete detection, and cost reduction and efficiency improvement are achieved.
The above are all preferred embodiments of the present application, and are not limited to the scope of the present application, and the alarm device of the present application can be used for detecting various gases, and is not limited to detecting fuel gas, so: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (9)
1. A laser gas alarm, comprising:
a housing (100), wherein a gas collection hole (110) communicating with the external environment is formed in the housing (100);
the acquisition module (200) is arranged in the shell (100), forms a laser detection channel (211) and is communicated with the gas acquisition hole (110);
the alarm module is arranged in the shell (100) and is electrically connected with the acquisition module (200), and when the acquired gas concentration within the set threshold range, an alarm is triggered;
the self-checking module (400) comprises a transparent vessel (420) which is arranged in the shell (100) in a sliding manner, wherein the transparent vessel (420) is internally sealed with gas after concentration calibration, and the transparent vessel (420) can be moved into the laser detection channel (211) for checking an alarm.
2. The laser gas alarm of claim 1, wherein the acquisition module (200) comprises:
a mounting block (210) disposed within the housing (100), the laser detection channel (211) being formed on the mounting block (210);
the laser collector (220) is arranged on the laser detection channel (211), and the transmitting end (221) and the receiving end (222) are respectively positioned at two ends of the laser detection channel (211) and form a detection area.
3. The laser gas alarm according to any of claims 1-2, wherein the self-test module (400) comprises:
the accommodating block (410) is arranged in the shell (100) to form an accommodating space, and the transparent vessel (420) is accommodated in the space and can slide into the laser detection channel (211);
and the sliding component (430) is arranged on the accommodating block (410) and connected with the transparent vessel (420) and is used for driving the transparent vessel (420) to enter or slide out of the laser detection channel (211).
4. A laser gas alarm as claimed in claim 3, wherein the slip assembly (430) comprises:
the fixed rings (431) are arranged at two ends of the transparent vessel (420) and are positioned at the outer side of the transparent vessel (420);
the guide rod (432) is arranged on the fixed ring (431), and the fixed ring (431) slides on the accommodating block (410) through the guide rod (432);
the pressing piece is movably arranged on the accommodating block (410), is connected with the guide rod (432) and drives the guide rod (432) to slide;
and the driving piece (440) is arranged on the accommodating block (410) and is used for driving the pressing piece to move.
5. The laser gas alarm according to claim 4, wherein a sensor is provided on the receiving block (410), and the pressing member triggers the sensor when performing self-detection, and the sensor is electrically connected with the alarm module to trigger a detection sound of "self-detection" and is used for calculating a trigger duration.
6. A laser gas alarm according to claim 3, characterized in that the end of the transparent vessel (420) remote from the emission end (221) is provided with a convex lens.
7. The portable performance self-detection method for the laser gas alarm is characterized by comprising the following steps of:
acquiring a self-checking instruction;
based on the self-checking instruction, driving a container filled with standard gas with specified concentration into a detection space for detection;
judging whether the detected concentration is greater than a set alarm threshold, if so, triggering an alarm, and if not, not triggering an alarm, wherein the equipment is abnormal;
after the detection is completed, the container with the standard gas is withdrawn, so that the alarm works normally.
8. The method for portable performance self-test of a laser gas alarm according to claim 7, further comprising, prior to obtaining the self-test instruction:
and periodically sending a self-checking information prompt to perform self-checking work.
9. The portable performance self-detection method of a laser gas alarm according to claim 7, wherein the container is cylindrical, square or round table-shaped, and the interior is sealed and filled with gas to be detected with a specified concentration, and the method is used for simulating a state that the gas to be detected leaks to reach the specified concentration.
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| CN202311659880.9A CN117351662A (en) | 2023-12-06 | 2023-12-06 | Laser gas alarm and portable performance self-detection method thereof |
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