阅读说明：本技术 一种光干涉甲烷测定器干涉条纹观察和校准设备及方法 (Interference fringe observation and calibration equipment and method for optical interference methane detector ) 是由 朱鹏朝 王进军 梁庆华 于 2021-09-09 设计创作，主要内容包括：本发明公开一种光干涉甲烷测定器干涉条纹观察和校准设备及方法,包括套设在测定器本体目镜外侧的第一调节组件、与第一调节组件固定连接的第二调节组件,第二调节组件内固定连接有焦距调节组件,焦距调节组件内设有图像采集装置,图像采集装置电性连接有数据处理模块,数据处理模块电性连接有图像显示装置；第一调节组件、第二调节组件用于调节图像采集装置的轴线位置度；焦距调节组件用于调节图像采集装置的聚焦点。本发明目的在于有效缓解光干涉甲烷测定器在出厂装配校准、维修校准和检定校准时对人眼睛的伤害和避免肉眼观察造成的精度误差。(The invention discloses interference fringe observation and calibration equipment and a method for a light interference methane detector, wherein the equipment comprises a first adjusting component sleeved outside an ocular lens of a detector body and a second adjusting component fixedly connected with the first adjusting component, a focal length adjusting component is fixedly connected in the second adjusting component, an image acquisition device is arranged in the focal length adjusting component, the image acquisition device is electrically connected with a data processing module, and the data processing module is electrically connected with an image display device; the first adjusting assembly and the second adjusting assembly are used for adjusting the axial position degree of the image acquisition device; the focal length adjusting component is used for adjusting the focal point of the image acquisition device. The invention aims to effectively relieve the damage to human eyes when the optical interference methane measuring device is subjected to factory assembly calibration, maintenance calibration and verification calibration and avoid the precision error caused by visual observation.)

1. An optical interference methane analyzer interference fringe observation and calibration device, characterized by: the device comprises a first adjusting component (2) sleeved outside an ocular lens of a tester body (1) and a second adjusting component (3) fixedly connected with the first adjusting component (2), wherein a focal length adjusting component (4) is fixedly connected in the second adjusting component (3), an image acquisition device is arranged in the focal length adjusting component (4), the image acquisition device is electrically connected with a data processing module, and the data processing module is electrically connected with an image display device;

the first adjusting component (2) is used for adjusting the axial position degree of one direction of the image acquisition device;

the second adjusting component (3) is used for adjusting the axial position degree of the image acquisition device in the other direction;

the focal length adjusting component (4) is used for adjusting the focal point of the image acquisition device;

the image acquisition device is used for acquiring image information in the eyepiece of the determinator body (1);

the data processing module is used for processing the image information acquired by the image acquisition device;

the image display device is used for displaying the image information acquired by the image acquisition device.

2. An optical interferometric methanometer fringe viewing and calibration apparatus according to claim 1, in which: the first adjusting assembly (2) comprises a first fixing seat (201), a first through hole (207) is formed in the center of the first fixing seat (201), the first through hole (207) is matched with an eye lens of the analyzer body (1), one end of a first movable plate (209) is fixedly connected to the top of the first fixing seat (201), a first gap (202) is reserved between the first movable plate (209) and the first fixing seat (201), and the forming direction of the first gap (202) is perpendicular to the axis of the first through hole (207);

wear to be equipped with first set screw (203) on first fly leaf (209), threaded connection has first jack-up screw (204) on first fly leaf (209), first set screw (203) one end with first fixing base (201) fixed connection, first jack-up screw (204) one end with first fixing base (201) contact setting, first fly leaf (209) with second adjusting part (3) fixed connection.

3. An optical interferometric methanometer fringe viewing and calibration apparatus according to claim 2, in which: the second adjusting assembly (3) comprises a second fixed seat (301), a second through hole (307) is formed in the center of the second fixed seat (301), one end of a second movable plate (309) is fixedly connected to the top of the first fixed seat (201), a second gap (302) is reserved in the second movable plate (309) and the second fixed seat (301), and the forming direction of the second gap (302) is perpendicular to the axis of the second through hole (307);

a second locking screw (303) penetrates through the second movable plate (309), a second jacking screw (304) is connected to the second movable plate (309) in a threaded manner, one end of the second locking screw (303) is fixedly connected with the second movable plate (309), and one end of the second jacking screw (304) is arranged in contact with the second movable plate (309);

the open end of the second slit (302) faces opposite to the open end of the first slit (202); the second via hole (307) is parallel to the axis of the first via hole (207), and the first movable plate (209) is fixedly connected with the second movable plate (309).

4. An optical interferometric methanometer fringe viewing and calibration apparatus according to claim 3, in which: the focal length adjusting assembly (4) comprises a fixed sleeve (405) arranged in the second via hole (307) in a penetrating manner, the fixed sleeve (405) is of a T-shaped structure, the narrow end of the fixed sleeve (405) extends into the first via hole (207), the narrow end diameter of the fixed sleeve (405) is smaller than that of the first via hole (207), the wide end diameter of the fixed sleeve (405) is matched with the second via hole (307), a camera mounting sleeve (406) is connected in the fixed sleeve (405) in a sliding manner, a spring (404) is sleeved on the outer side of the camera mounting sleeve (406), the spring (404) is positioned between the camera mounting sleeve (406) and the fixed sleeve (405), the image acquisition device is positioned in the camera mounting sleeve (406), a knob (401) is connected to the inner wall of the camera mounting sleeve (406) in a threaded manner, a gland (403) is fixedly connected to one end, far away from the second fixed base (301), of the fixed sleeve (405), the knob (401) penetrates through the gland (403) and is rotatably connected with the gland (403), and a threading hole (402) is formed in the center of the knob (401).

5. An optical interferometric methanometer fringe viewing and calibration apparatus according to claim 2, in which: first clearance (205) have been seted up to first fixing base (201) one side, first clearance (205) run through first via hole (207) one side, threaded connection has first fastening screw (206) on first clearance (205).

6. An optical interferometric methanometer fringe viewing and calibration apparatus according to claim 3, in which: a second gap (305) is formed in one side of the second fixed seat (301), the second gap (305) penetrates through one side of the second through hole (307), and a second fastening screw (306) is connected to the second gap (305) in a threaded mode.

7. An optical interferometric methanometer fringe viewing and calibration apparatus according to claim 3, in which: a plurality of first fixing screw holes (208) are formed in the first fixing seat (201), a plurality of second fixing screw holes (308) are formed in the second fixing seat (301), and first screws are connected with the first fixing screw holes (208) and the second fixing screw holes (308) in an internal thread mode;

at least two first fixing screw holes (208) are formed in the first movable plate (209), at least two second connecting screw holes (310) are formed in the second movable plate (309), and second screws are connected to the first fixing screw holes (208) and the second connecting screw holes (310) in an internal thread mode.

8. An optical interferometric methanometer fringe viewing and calibration apparatus according to claim 1, in which: the image acquisition device is a macro camera, the data processing module is one of a PC (personal computer) terminal, a PLC (programmable logic controller) and an FPGA (field programmable gate array), and the image display device is one of an LED (light-emitting diode) display screen, a mobile phone display screen and an LCD (liquid crystal display) display screen.

9. A calibration method for interference fringe observation and calibration equipment of an optical interference methane determinator is characterized in that: the calibration device according to any of claims 1-8, comprising the steps of:

the image acquisition device is used for focusing and aligning, and after the image acquisition device is used for focusing and aligning, images in an eyepiece of the determinator body (1) are shot, and shot image information is transmitted to the data processing module;

and the data processing module judges the image information, when the optical interference fringes in the measurer body (1) are aligned with the scales in the ocular lens of the measurer body (1), the accuracy calibration of the optical interference methane measurer is judged to be qualified, and otherwise, the accuracy calibration of the optical interference methane measurer is judged to be unqualified.

Technical Field

The invention relates to the technical field of gas detection, in particular to interference fringe observation and calibration equipment and method for an optical interference methane detector.

Background

The optical interference methane determinator is made according to the optical interference principle, light emitted by a light source reaches a plane mirror through a spotlight, interference fringes are generated on a focal plane of an objective lens due to the result of optical path difference, preparation work which must be done before the optical interference methane determinator is manufactured, assembled, maintained, calibrated and verified is to check an optical path system, whether the interference fringes in an observation eyepiece are clear or not and whether the precision is accurate or not, the glasses of an operation engineer during factory assembly, maintenance and verification calibration have large damage and can cause precision errors through naked eye observation, and therefore an optical interference methane determinator interference fringe observation and calibration device is urgently needed to solve the problems.

Disclosure of Invention

The invention aims to provide interference fringe observation and calibration equipment for an optical interference methane determinator, which aims to solve the problems and effectively relieve the damage to human eyes during factory assembly calibration, maintenance calibration and verification calibration and avoid precision errors caused by human eye observation.

In order to achieve the purpose, the invention provides the following scheme:

an interference fringe observation and calibration device of an optical interference methane determinator comprises a first adjusting assembly and a second adjusting assembly, wherein the first adjusting assembly is sleeved on the outer side of an eyepiece of a determinator body, the second adjusting assembly is fixedly connected with the first adjusting assembly, a focal length adjusting assembly is fixedly connected in the second adjusting assembly, an image acquisition device is arranged in the focal length adjusting assembly, the image acquisition device is electrically connected with a data processing module, and the data processing module is electrically connected with an image display device;

the first adjusting component is used for adjusting the axial line position degree of the image acquisition device in one direction;

the second adjusting component is used for adjusting the axial position degree of the image acquisition device in the other direction;

the focal length adjusting component is used for adjusting the focal point of the image acquisition device;

the image acquisition device is used for acquiring image information in the eyepiece of the determinator body;

the data processing module is used for processing the image information acquired by the image acquisition device;

the image display device is used for displaying the image information acquired by the image acquisition device.

Preferably, the first adjusting assembly comprises a first fixing seat, a first via hole is formed in the center of the first fixing seat, the first via hole is matched with the eyepiece of the determinator body, one end of a first movable plate is fixedly connected to the top of the first fixing seat, a first gap is reserved between the first movable plate and the first fixing seat, and the opening direction of the first gap is perpendicular to the axis of the first via hole;

wear to be equipped with first set screw on the first fly leaf, threaded connection has first jack-up screw on the first fly leaf, first set screw one end with first fixing base fixed connection, first jack-up screw one end with first fixing base contact sets up, first fly leaf with second adjusting part fixed connection.

Preferably, the second adjusting assembly comprises a second fixed seat, a second via hole is formed in the center of the second fixed seat, one end of a second movable plate is fixedly connected to the top of the first fixed seat, a second gap is reserved between the second movable plate and the second fixed seat, and the forming direction of the second gap is perpendicular to the axis of the second via hole;

a second locking screw penetrates through the second movable plate, a second jacking screw is connected to the second movable plate in a threaded manner, one end of the second locking screw is fixedly connected with the second movable plate, and one end of the second jacking screw is arranged in contact with the second movable plate;

the open end of the second slit faces opposite to the open end of the first slit; the second via hole is parallel to the axis of the first via hole, and the first movable plate is fixedly connected with the second movable plate.

Preferably, focus adjusting part is including wearing to establish fixed cover in the second cross hole, fixed cover is T type structure, the narrow end of fixed cover stretches into first via hole, the narrow end diameter of fixed cover is less than first via hole diameter, the wide end diameter of fixed cover with second via hole phase-match, sliding connection has the camera installation cover in the fixed cover, camera installation cover outside cover is equipped with the spring, the spring is located between camera installation cover, the fixed cover, image acquisition device is located in the camera installation cover, camera installation cover inner wall threaded connection has the knob, and fixed cover is kept away from the one end fixedly connected with gland of second fixing base, the knob passes the gland and with the gland rotates to be connected, the through wires hole has been seted up at the knob center.

Preferably, a first gap is formed in one side of the first fixing seat, the first gap penetrates through one side of the first via hole, and a first fastening screw is connected to the first gap in a threaded manner.

Preferably, a second gap is formed in one side of the second fixed seat, the second gap penetrates through one side of the second via hole, and a second fastening screw is in threaded connection with the second gap.

Preferably, a plurality of first fixing screw holes are formed in the first fixing seat, a plurality of second fixing screw holes are formed in the second fixing seat, and first screws are connected to the first fixing screw holes and the second fixing screw holes in an internal thread mode.

Preferably, the first movable plate is provided with at least two first fixing screw holes, the second movable plate is provided with at least two second connecting screw holes, and the first fixing screw holes and the second connecting screw holes are connected with second screws in an internal thread mode.

Preferably, the image acquisition device is a macro camera, the data processing module is one of a PC terminal, a PLC and an FPGA, and the image display device is one of an LED display screen, a mobile phone display screen and an LCD display screen.

A calibration method for interference fringe observation and calibration equipment of an optical interference methane detector is disclosed, wherein the calibration equipment is the calibration equipment in the technical scheme, and comprises the following steps:

the image acquisition device carries out focusing alignment, and after the image acquisition device carries out focusing alignment, the image in the eyepiece of the determinator body is shot, and shot image information is transmitted to the data processing module;

and the data processing module judges the image information, judges that the optical interference methane measuring device is qualified in calibration when the optical interference fringes in the measuring device body are aligned with the scales in the eyepiece of the measuring device body, and judges that the optical interference methane measuring device is unqualified if the optical interference fringes are not aligned with the scales in the eyepiece of the measuring device body.

The invention has the following technical effects:

the image acquisition device is fixedly connected outside the eyepiece of the determinator body, acquires an interference fringe image in the eyepiece, displays the acquired interference fringe image through the image display device, and an operation engineer calibrates, maintains and verifies the optical interference methane determinator by observing interference fringe information displayed in the display device, so that the human eyes are prevented from directly seeing a light source in the eyepiece, the human eyes are protected, and precision errors caused by human eye observation can be avoided.

Through the cooperation adjustment of first adjusting part and second adjusting part, adjust image acquisition device's focus position jointly, make image acquisition device's focus and the axis coincidence of image in the eyepiece, provide supplementary for the transmission clear image.

The primary focal length of the image acquisition device is adjusted through the focal length adjusting assembly, so that the adjustment amount of the focusing process of the image acquisition device is reduced, and assistance is provided for later-stage transmission of clear images.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a first adjusting assembly and a second adjusting assembly of the present invention;

FIG. 3 is a schematic view of a first adjustment assembly of the present invention;

FIG. 4 is a schematic view of a second adjustment assembly of the present invention;

FIG. 5 is a schematic view of a second adjusting assembly and a focal length adjusting assembly according to the present invention;

FIG. 6 is a schematic cross-sectional view of FIG. 5;

FIG. 7 is an intraocular image of the measuring instrument body.

Wherein, 1, the measuring device body; 2. a first adjustment assembly; 201. a first fixed seat; 202. a first slit; 203. a first locking screw; 204. a first jacking screw; 205. a first gap; 206. a first fastening screw; 207. a first via hole; 208. a first set screw hole; 209. a first movable plate; 210. a first connecting screw hole; 3. a second adjustment assembly; 301. a second fixed seat; 302. a second slit; 303. a second locking screw; 304. a second jacking screw; 305. a second gap; 306. a second fastening screw; 307. a second via hole; 308. a second set screw hole; 309. a second movable plate; 310. a second connecting screw hole; 4. a focus adjustment assembly; 401. a knob; 402. threading holes; 403. a gland; 404. a spring; 405. fixing a sleeve; 406. camera installation cover.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

Referring to fig. 1-6, the invention provides an interference fringe observation and calibration device for a light interference methane measuring device, which comprises a first adjusting component 2 and a second adjusting component 3, wherein the first adjusting component 2 is sleeved outside an ocular lens of a measuring device body 1, the second adjusting component 3 is fixedly connected with the first adjusting component 2, a focal length adjusting component 4 is fixedly connected in the second adjusting component 3, an image acquisition device is arranged in the focal length adjusting component 4, the image acquisition device is electrically connected with a data processing module, and the data processing module is electrically connected with an image display device;

the first adjusting component 2 is used for adjusting the axial position degree of the image acquisition device in one direction;

the second adjusting component 3 is used for adjusting the axial position degree of the image acquisition device in the other direction;

the focal length adjusting component 4 is used for adjusting the focal point of the image acquisition device;

the image acquisition device is used for acquiring image information in the eyepiece of the determinator body 1;

the data processing module is used for processing the image information acquired by the image acquisition device;

the image display device is used for displaying the image information acquired by the image acquisition device.

According to the invention, the image acquisition device is fixedly connected outside the ocular lens of the measurer body 1, the image acquisition device acquires an interference fringe image in the ocular lens, the acquired interference fringe image is displayed through the image display device, and an operation engineer calibrates, maintains and verifies the optical interference methane measurer by observing interference fringe information displayed in the display device, so that the eyes of a person are prevented from directly seeing a light source in the ocular lens, and the eyes of the person are protected.

Through the cooperation adjustment of first adjusting part 2 and second adjusting part 3, adjust image acquisition device's focus position jointly, make image acquisition device's focus and the axis coincidence of image in the eyepiece, provide supplementary for the transmission sharp image.

The primary focal length of the image acquisition device is adjusted through the focal length adjusting component 4, so that the adjustment amount of the focusing process of the image acquisition device is reduced, and assistance is provided for later-stage transmission of clear images.

In a further optimized scheme, the first adjusting assembly 2 comprises a first fixed seat 201, a first through hole 207 is formed in the center of the first fixed seat 201, the first through hole 207 is matched with an ocular lens of the measuring device body 1, one end of a first movable plate 209 is fixedly connected to the top of the first fixed seat 201, a first gap 202 is reserved between the first movable plate 209 and the first fixed seat 201, and the forming direction of the first gap 202 is perpendicular to the axis of the first through hole 207;

the first movable plate 209 is provided with a first locking screw 203 in a penetrating manner, the first movable plate 209 is connected with a first jacking screw 204 in a threaded manner, one end of the first locking screw 203 is fixedly connected with the first fixed seat 201, one end of the first jacking screw 204 is arranged in contact with the first fixed seat 201, and the first movable plate 209 is fixedly connected with the second adjusting assembly 3.

The gap between the first movable plate 209 and the first fixed seat 201 can be increased by rotating the first jacking screw 204, and the gap between the first movable plate 209 and the first fixed seat 201 can be decreased by rotating the first locking screw 203, so that the first movable plate 209 drives the second adjusting component 3 to move, the second adjusting component 3 drives the image acquisition device to move, and the function of adjusting the axial line position degree of the image acquisition device in one direction is realized.

In a further optimized scheme, the second adjusting assembly 3 includes a second fixed seat 301, a second through hole 307 is formed in the center of the second fixed seat 301, one end of a second movable plate 309 is fixedly connected to the top of the first fixed seat 201, a second gap 302 is reserved between the second movable plate 309 and the second fixed seat 301, and the forming direction of the second gap 302 is perpendicular to the axis of the second through hole 307;

a second locking screw 303 penetrates through the second movable plate 309, a second jacking screw 304 is connected to the second movable plate 309 in a threaded manner, one end of the second locking screw 303 is fixedly connected with the second movable plate 309, and one end of the second jacking screw 304 is arranged in contact with the second movable plate 309;

the open end of the second slit 302 faces opposite to the open end of the first slit 202; the second via 307 is parallel to the first via 207, and the first movable plate 209 is fixedly connected to the second movable plate 309.

The gap between the second movable plate 309 and the second fixed seat 301 can be increased by rotating the second jacking screw 304, and the gap between the second movable plate 309 and the second fixed seat 301 can be decreased by rotating the second locking screw 303, so that the second movable plate 309 pushes the second fixed seat 301 to move, and the second fixed seat 301 drives the image capturing device to move, thereby realizing the function of adjusting the axial position of the image capturing device in another direction.

Further optimize the scheme, focus adjusting part 4 is including wearing to establish the fixed cover 405 in second via hole 307, fixed cover 405 is T type structure, the narrow end of fixed cover 405 stretches into first via hole 207, the narrow end diameter of fixed cover 405 is less than first via hole 207 diameter, the wide end diameter and the second via hole 307 phase-match of fixed cover 405, sliding connection has camera installation cover 406 in fixed cover 405, camera installation cover 406 outside cover is equipped with spring 404, spring 404 is located camera installation cover 406, fixed cover 405, image acquisition device is located camera installation cover 406, camera installation cover 406 inner wall threaded connection has knob 401, the one end fixedly connected with gland of second fixing base 301 is kept away from to fixed cover 405, knob 401 passes gland 403 and rotates with gland 403 to be connected, through wires hole 403 has been seted up at knob 401 center.

Through rotating knob 401, knob 401 drives camera installation cover 406 and realizes removing, is provided with spring 404 between camera installation cover 406 and the fixed cover 405, and spring 404 provides reset function for the removal of camera installation cover 406.

In a further optimized scheme, a first gap 205 is formed in one side of the first fixing seat 201, the first gap 205 penetrates through one side of the first via hole 207, and a first fastening screw 206 is connected to the first gap 205 in a threaded manner.

The eyepiece of the measuring device body 1 is fixed to the first fixing base 201 by tightening the first fastening screw 206.

In a further optimized scheme, a second gap 305 is formed in one side of the second fixing seat 301, the second gap 305 penetrates through one side of the second through hole 307, and a second fastening screw 306 is in threaded connection with the second gap 305.

The fixation of the fixation sleeve 405 to the second fixation seat 301 is achieved by tightening the second fastening screw 306.

Further optimize the scheme, seted up a plurality of first set screw hole 208 on the first fixing base 201, seted up a plurality of second set screw hole 308 on the second fixing base 301, first set screw hole 208, second set screw hole 308 internal threaded connection have first screw.

During initial installation, can realize fixedly with first fixing base 201 and second fixing base 301 through first screw, first set screw hole 208, second set screw hole 308, treat first fixing base 201 and the fixed back of the eyepiece of apparatus body 1, it can to tear first screw down.

In a further optimized scheme, the first movable plate 209 is provided with at least two first fixing screw holes 208, the second movable plate 309 is provided with at least two second connecting screw holes 310, and the first fixing screw holes 208 and the second connecting screw holes 310 are in threaded connection with second screws.

The first movable plate 209 and the second movable plate 309 are fixedly connected through the second screw, the first fixing screw hole 208 and the second connecting screw hole 310.

According to the further optimization scheme, the image acquisition device is a macro camera, the data processing module is one of a PC (personal computer) terminal, a PLC (programmable logic controller) and an FPGA (field programmable gate array), and the image display device is one of an LED (light-emitting diode) display screen, a mobile phone display screen and an LCD (liquid crystal display) display screen.

The focusing method of the image acquisition device in the technical scheme comprises the following steps of acquiring a first value alpha of a current shot picture through the image acquisition device, controlling the lens in the image acquisition device to move, recording a second value beta of the shot picture after moving, controlling the lens in the image acquisition device to move, recording a third value gamma of the shot picture after second moving, wherein the first value alpha, the second value beta and the third value gamma are brightness values, and the data processing module compares the brightness values of the alpha, the beta and the gamma; selecting an optimal value lambda, wherein the lambda selects the maximum value of alpha, beta and gamma; the data processing module records the lens position b when the optimal value lambda is recorded, controls the lens in the image acquisition device to move to the front of the position b, and records a second value beta of a shot picture after moving₂The data processing module controls a lens in the image acquisition device to move to the rear of the position b and records a third value gamma of a shot picture after moving₂Selecting the optimum value gamma_△，γ_△Selection of beta₂、γ₂And lambda, the lens displacement distance in the image acquisition device decreases with the repetition times, and the process is repeated until the lens displacement distance is 0, so that the focusing of the image acquisition device is completed.

Referring to fig. 7, a calibration method of an interference fringe observation and calibration apparatus for an optical interference methane measuring instrument, characterized in that: the calibration device is the calibration device in the technical scheme, and comprises the following steps:

the image acquisition device carries out focusing alignment, and after the image acquisition device carries out focusing alignment, images in an eyepiece of the determinator body 1 are shot, and shot image information is transmitted to the data processing module;

the data processing module judges the image information, when the blackest stripe in the optical interference stripes in the measurer body 1 is aligned with the zero-position scale of the scale in the eyepiece of the measurer body 1 and the fifth purple and green boundary stripe is aligned with the seventh scale mark, the optical interference methane measurer is judged to be qualified in precision calibration, the data processing module is electrically connected with a buzzer, when the optical interference methane measurer is detected to be qualified, the data processing module controls the buzzer to give a sound prompt, the image display device displays the qualified calibration information, otherwise, the optical interference methane measurer is judged to be unqualified, and the buzzer and the image display device do not give instructions.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.