CN111239350A - Sensor detection device for composite gas - Google Patents
Sensor detection device for composite gas Download PDFInfo
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- CN111239350A CN111239350A CN202010267896.5A CN202010267896A CN111239350A CN 111239350 A CN111239350 A CN 111239350A CN 202010267896 A CN202010267896 A CN 202010267896A CN 111239350 A CN111239350 A CN 111239350A
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- XOMKZKJEJBZBJJ-UHFFFAOYSA-N 1,2-dichloro-3-phenylbenzene Chemical compound ClC1=CC=CC(C=2C=CC=CC=2)=C1Cl XOMKZKJEJBZBJJ-UHFFFAOYSA-N 0.000 description 4
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- JAYCNKDKIKZTAF-UHFFFAOYSA-N 1-chloro-2-(2-chlorophenyl)benzene Chemical compound ClC1=CC=CC=C1C1=CC=CC=C1Cl JAYCNKDKIKZTAF-UHFFFAOYSA-N 0.000 description 2
- 101100084627 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) pcb-4 gene Proteins 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0011—Sample conditioning
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0031—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array
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Abstract
The invention discloses a sensor detection device for composite gas, which comprises a gas chamber main body, a gas chamber connector, a sensor group, a pin PCB and a signal processing PCB. The air chamber main body is provided with a plurality of independent sensor group installation cavities so as to isolate the sensor groups from each other, and the air inlet end of each sensor group installation cavity is communicated with a public air cavity so that each sensor can detect air. The joint between the air chamber connector and the air chamber main body is provided with a sealing ring to form a sealing structure, a cavity is arranged in the air chamber connector to accommodate two PCB boards, and the lower end of the air chamber main body is provided with a connecting part. The invention solves the problems of large volume and complex assembly of the traditional all-in-one air chamber, simultaneously, each sensor can contact the gas in the common air chamber area for detection, solves the problem of long air path of the traditional all-in-one air chamber, avoids the cross interference during the measurement of the sensor, and greatly shortens the test time of the sensor T90.
Description
Technical Field
The invention relates to the technical field of sensors, in particular to a sensor detection device for composite gas.
Background
The scheme of the combination use of the all-in-one sensor of the fixed gas detector in the current market is that a plurality of independent sensor air chambers are fixed on one instrument by using a fixing device; the all-in-one sensor has large air chamber volume, complex assembly and long air path, and the sensor needs to be calibrated for each air chamber independently; the method is commonly used for diffusion type gas detection, and when the method is applied to flow-through type gas detection, the test time of the sensor T90 is very long, and the cross interference condition of the sensor measurement exists.
Disclosure of Invention
In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a sensor detection device for complex gas, which is designed to: the problem of traditional all-in-one air chamber bulky, the equipment is loaded down with trivial details is solved, simultaneously, every sensor can both contact the gas in public air cavity district and detect, it is long to have solved traditional all-in-one air chamber gas circuit, cross interference when avoiding the sensor to measure has greatly shortened sensor T90 test time.
In order to solve the technical problem, the invention is realized by the following scheme: the invention provides a sensor detection device for composite gas, comprising:
the air chamber main body is provided with a plurality of independent sensor group installation cavities so as to isolate the sensor groups from each other, and the air inlet end of each sensor group installation cavity is communicated with a public air cavity so that each sensor can detect air;
the air chamber connector is detachably arranged at the upper end of the air chamber main body, a sealing ring is arranged at the joint between the air chamber connector and the air chamber main body to form a sealing structure, a containing cavity is arranged in the air chamber connector to contain two PCB boards, and a connecting part is arranged at the lower end of the air chamber main body;
the sensor group corresponds to the sensor group mounting cavity and is packaged in the sensor group mounting cavity, the sensor group comprises a sensor, a sealing gasket, a waterproof and dustproof assembly and a pressure ring which are arranged from top to bottom, and a ventilation channel communicated with the public air cavity is formed between the sensing surface of the sensor and the pressure ring;
the first PCB is fixedly arranged on the top surface of the air chamber main body and covers the upper openings of the sensor group installation cavities, and the sensors are inserted into the first PCB;
and the second PCB is packaged in the cavity of the air chamber connector and is connected with the first PCB through the pin header and the female header.
The air inlet joint and the air outlet joint are connected with the connecting part, the connecting part is provided with a sealing ring to form a sealing structure, and the air inlet joint and the air outlet joint are connected with the public air cavity and communicated with the public air cavity.
Further, the air inlet connector and the air outlet connector are vertically arranged, wherein the air inlet connector and the sensing surface of the sensor form a parallel structure, and the air outlet connector is far away from the air inlet connector and the air outlet direction of the air inlet connector is back to and perpendicular to the sensing surface of the sensor.
Furthermore, the top of the air chamber connector is provided with a wire inlet hole, a wire harness penetrates through the wire inlet hole and is sleeved with a sealing sleeve outside the wire inlet hole, and glue is filled in the wire inlet hole so that the wire harness and the air chamber connector form a sealing structure at the wire inlet hole.
Further, the wire harness is electrically connected to the second PCB board.
Furthermore, the sealing gasket is arranged between the sensing surface at the lower end of the sensor and the waterproof and dustproof assembly in a cushioning mode, the sealing gasket is ring-shaped, and the sensing surface is reserved on the sealing gasket and is in space contact with the waterproof and dustproof assembly.
Further, waterproof dustproof subassembly includes waterproof ventilated membrane and powder metallurgy piece that the laminating is in the same place, waterproof ventilated membrane is the one-way membrane that admits air, and its outside water can not enter into the inboard, and its inside hydroenergy can be from inside to outside penetrating out, the powder metallurgy piece dorsad the sensor is equipped with the bleeder vent on it.
Furthermore, the pressing ring is in threaded connection with the lower opening of the sensor group installation cavity and fastens the sealing gasket and the waterproof and dustproof assembly, a through hole is formed in the pressing ring, the outer end of the through hole is communicated with the public air cavity, and the inner opening of the pressing ring is in contact with the waterproof and dustproof assembly to form a ventilation structure.
Further, the first PCB board is a pin PCB board and is locked on the air chamber main body through a single-head copper cylinder.
Furthermore, the second PCB is a signal processing PCB and is locked on the air chamber main body through a single-head copper cylinder.
Compared with the prior art, the invention has the beneficial effects that: the composite gas sensor detection device solves the problems of large volume and complex assembly of the traditional all-in-one gas chamber, and simultaneously, each sensor can contact the gas in the common gas chamber area for detection, thereby solving the problem of long gas path of the traditional all-in-one gas chamber, avoiding the cross interference during the measurement of the sensor and greatly shortening the T90 test time of the sensor.
Compared with the prior art, the invention also has the following advantages:
1. a plurality of sensors in any combination are placed in one air chamber, and the air chamber is relatively small in size.
2. The combination mode is various, and it is convenient to change.
3. The detection placement is compatible with both diffusion and flow-through.
4. The gas path is short, the time of the sensor T90 is short, and the sensor has no cross interference during measurement.
5. The air chamber metal casing, the sensor has independent installation hole site, and the isolated explosion-proof each other.
Drawings
Fig. 1 is a structural view of a sensor detection device of a diffusion type structure in embodiment 2 of the present invention.
Fig. 2 is a structural diagram of a sensor detection device of a flow-through configuration in embodiment 3 of the present invention.
FIG. 3 is a schematic view of the four sensor mounting structures independently mounted on the main body of the air chamber of the present invention.
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, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and thus the protection scope of the present invention is more clearly and clearly defined. It should be apparent that the described embodiments of the present invention are only some embodiments of the present invention, and not all 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 the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1: the concrete structure of the invention is as follows:
referring to fig. 1-3, a composite gas sensor detecting device according to the present invention includes:
a gas chamber body 10 provided with a plurality of independent sensor group installation cavities to isolate the sensor groups from each other, and the gas inlet end of each sensor group installation cavity is communicated with a common gas cavity to enable each sensor 6 to detect gas;
the air chamber connector 3 is detachably mounted at the upper end of the air chamber main body 10, a sealing ring is arranged at the joint between the air chamber connector 3 and the air chamber main body 10 to form a sealing structure, a cavity is arranged in the air chamber connector 3 to accommodate two PCB boards, and a connecting part is arranged at the lower end of the air chamber main body 10;
the sensor group corresponds to the sensor group mounting cavity and is packaged in the sensor group mounting cavity, the sensor group comprises a sensor 6, a sealing gasket 7, a waterproof and dustproof assembly 8 and a pressing ring 9 which are arranged from top to bottom, and a ventilation channel communicated with the public air cavity is formed between the sensing surface of the sensor 6 and the pressing ring 9;
the first PCB 5 is fixedly arranged on the top surface of the air chamber main body 10 and covers the upper openings of the sensor group installation cavities, and the sensors 6 are inserted into the first PCB 5;
and the second PCB 4 is packaged in the cavity of the air chamber connector 3 and is connected with the first PCB 5 through the pin header and the female pin header.
A preferred technical solution of this embodiment: the sensor detection device of the composite gas further comprises a flow-through joint 11, wherein the flow-through joint 11 is connected with the connecting part and is provided with a sealing ring at the connecting part to form a sealing structure, and the flow-through joint is provided with the public air cavity, and an air inlet joint and an air outlet joint which are connected with and communicated with the public air cavity.
A preferred technical solution of this embodiment: the air inlet connector and the air outlet connector are vertically arranged, wherein the air inlet connector and the sensing surface of the sensor 6 form a parallel structure, and the air outlet connector is far away from the air inlet connector and the air outlet direction of the air inlet connector is back to and perpendicular to the sensing surface of the sensor 6.
A preferred technical solution of this embodiment: the top of the air chamber connector 3 is provided with a wire inlet hole, a wire harness 1 penetrates through the wire inlet hole and is sleeved with a sealing sleeve 2 outside the wire inlet hole, and glue is filled in the wire inlet hole so that the wire harness 1 and the air chamber connector 3 form a sealing structure at the wire inlet hole.
A preferred technical solution of this embodiment: the wire harness 1 is electrically connected to the second PCB board 4.
A preferred technical solution of this embodiment: the sealing gasket 7 is arranged between the sensing surface at the lower end of the sensor 6 and the waterproof and dustproof assembly 8 in a cushioning mode, the sealing gasket 7 is in a ring shape, and the sensing surface is reserved on the part of the sealing gasket and is in space contact with the waterproof and dustproof assembly 8.
A preferred technical solution of this embodiment: waterproof dustproof subassembly 8 includes waterproof ventilated membrane and powder metallurgy piece that the laminating is in the same place, waterproof ventilated membrane is the one-way air inlet membrane, and its outside water can not enter into the inboard, and its inside hydroenergy can be from inside to outside penetrating out, the powder metallurgy piece dorsad sensor 6 is equipped with the bleeder vent on it.
A preferred technical solution of this embodiment: the pressing ring 9 is in threaded connection with the lower opening of the sensor group installation cavity and fastens the sealing gasket 7 and the waterproof and dustproof assembly 8, a through hole is formed in the pressing ring, the outer end of the through hole is communicated with the public air cavity, and the inner opening of the pressing ring is in contact with the waterproof and dustproof assembly 8 to form a ventilation structure.
A preferred technical solution of this embodiment: the first PCB 5 is a pin PCB which is locked on the air chamber main body 10 through a single-head copper cylinder.
A preferred technical solution of this embodiment: the second PCB 4 is a signal processing PCB, and is locked to the air chamber body 10 by a single-ended copper cylinder.
Example 2:
as shown in fig. 1 and 3, fig. 1 is a structural view of a sensor detection device of a diffusion type structure in embodiment 2 of the present invention.
The diffusion structure is summarized as follows: take the four-in-one air chamber main part diffusion formula in fig. 3 as an example, sensor 6 inserts on the stitch PCB board, the stitch PCB board is locked on air chamber main part 10 with single-end copper post, female with the row of pins of signal processing PCB board, signal processing PCB board lock is on single-end copper post, air chamber main part 10 connects 3 threaded connection with the air chamber and fixes, sensor 6 is sealed 7 and waterproof dustproof subassembly 8 protection of filling up, sealed 7 and waterproof dustproof combination 8 are fixed by the threaded connection of clamping ring 9 and air chamber main part 10.
The use form and the working principle of the diffusion structure are as follows: the air chamber body 10 is fixed through threads on the air chamber joint 3; the air chamber main body 10 is integrally sealed, the wiring harness 1 penetrates through the sealing sleeve 2 and then is sealed with the air chamber joint 3 by pouring sealant, the air chamber joint 3 is sealed with the air chamber main body 10 by a sealing ring, and the sensor 6 is sealed by a sealing gasket 7; the gas diffusion that is detected passes waterproof dustproof subassembly 8, is detected by sensor 6, and the detected signal sends signal processing PCB board through stitch PCB board, through the data processing of signal processing PCB board, and the signal after the processing spreads out through pencil 1.
Example 3:
as shown in fig. 2 to 3, fig. 2 is a structural view of a flow-through sensor detection device in embodiment 3 of the present invention.
Summary of flow-through structural components: taking the flow type of the main body of the four-in-one air chamber as an example, a flow type joint 11 is added on the basis of a diffusion type structure; the flow-through joint 11 is screwed and fixed to the air chamber body 10.
The use form and the working principle of the flow-through structure are as follows: the air chamber body 10 is fixed through threads on the air chamber joint 3; the air chamber main body 10 is integrally sealed, the wiring harness 1 penetrates through the sealing sleeve 2 and then is sealed with the air chamber joint 3 through pouring sealant, the air chamber joint 3 is sealed with the air chamber main body 10 through a sealing ring, the flow joint 11 is sealed with the air chamber main body 10 through a sealing ring, and the sensor 6 is sealed through a sealing gasket 7. The detected gas flows into a public air cavity of the circulating type joint 11 through an air inlet joint by an air pump or other pressure devices, flows out to an air outlet joint through the air flow direction as shown in figure 2, the gas in the public air cavity passes through the waterproof and dustproof assembly 8 and is detected by the sensor 6, a detection signal is sent to the signal processing PCB through the stitch PCB, the data of the signal processing PCB is processed, and the processed signal is transmitted out through the wiring harness 1.
Example 4:
the air chamber main body 10 is a metal shell, the sensor mounting area on the air chamber main body is provided with an independent mounting hole position, and the sensors 6 are mutually isolated to achieve the explosion-proof effect.
In conclusion, the composite gas sensor detection device solves the problems of large volume and complex assembly of the traditional all-in-one gas chamber, and simultaneously, each sensor can contact the gas in the common gas chamber area for detection, thereby solving the problem of long gas path of the traditional all-in-one gas chamber, avoiding the cross interference during the measurement of the sensors and greatly shortening the T90 test time of the sensors. The invention places a plurality of sensors in any combination in one air chamber, and has relatively small volume. The sensor detection device has various combination modes and is convenient to replace. The sensor detection device of the invention can be used for both diffusion type and circulation type detection. The sensor detection device has short gas circuit, short time of the sensor T90 and no cross interference during the measurement of the sensor. The main body of the air chamber of the sensor detection device is a metal shell, and the sensors are provided with independent mounting hole sites which are mutually isolated and explosion-proof.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A composite gas sensor detection device, comprising:
the gas chamber comprises a gas chamber main body (10) which is provided with a plurality of independent sensor group installation cavities so as to isolate the sensor groups from each other, and the gas inlet end of each sensor group installation cavity is communicated with a public gas cavity so that each sensor (6) can detect gas;
the air chamber connector (3) is detachably mounted at the upper end of the air chamber main body (10), a sealing ring is arranged at the joint between the air chamber connector (3) and the air chamber main body (10) to form a sealing structure, a cavity is arranged in the air chamber connector (3) to accommodate two PCB boards, and a connecting part is arranged at the lower end of the air chamber main body (10);
the sensor group corresponds to the sensor group mounting cavity and is packaged in the sensor group mounting cavity, the sensor group comprises a sensor (6), a sealing gasket (7), a waterproof and dustproof assembly (8) and a pressing ring (9) which are arranged from top to bottom, and a ventilation channel communicated with the public air cavity is formed between the sensing surface of the sensor (6) and the pressing ring (9);
the first PCB (5) is fixedly arranged on the top surface of the air chamber main body (10) and covers the upper openings of the sensor group installation cavities, and the sensors (6) are inserted into the first PCB (5);
and the second PCB (4) is packaged in the cavity of the air chamber connector (3) and is in female connection with the first PCB (5) through a pin header.
2. The composite gas sensor detecting device according to claim 1, further comprising a flow-through joint (11), wherein the flow-through joint (11) is connected to the connecting portion and provided with a sealing ring at the connection portion to form a sealing structure, and the common gas chamber and the inlet joint and the outlet joint connected to and communicated with the common gas chamber are provided thereon.
3. The composite gas sensor detection device according to claim 2, wherein the inlet connector and the outlet connector are vertically arranged, wherein the inlet connector and the sensing surface of the sensor (6) form a parallel structure, and the outlet connector is far away from the inlet connector, and the outlet direction of the outlet connector is opposite to and vertical to the sensing surface of the sensor (6).
4. The composite gas sensor detection device according to claim 1, wherein a wire inlet hole is formed at the top of the air chamber connector (3), a wire harness (1) is arranged at the wire inlet hole in a penetrating manner and sleeved with a sealing sleeve (2) outside the wire harness, and the wire harness (1) and the air chamber connector (3) form a sealing structure at the wire inlet hole by pouring glue at the wire inlet hole.
5. A composite gas sensor detection device according to claim 4, characterized in that the wiring harness (1) is electrically connected to the second PCB board (4).
6. The sensor detection device of the composite gas according to claim 1, wherein the sealing gasket (7) is arranged between the sensing surface at the lower end of the sensor (6) and the waterproof and dustproof component (8), the sealing gasket (7) is ring-shaped, and the sensing surface is reserved at the part of the sealing gasket to be in space contact with the waterproof and dustproof component (8).
7. The composite gas sensor detection device according to claim 6, wherein the waterproof and dustproof assembly (8) comprises a waterproof and breathable film and a powder metallurgy sheet which are bonded together, the waterproof and breathable film is a one-way air inlet film, external water cannot enter the inside of the waterproof and breathable film, internal water in the waterproof and breathable film can penetrate out from the inside to the outside, and the powder metallurgy sheet faces away from the sensor (6) and is provided with air holes.
8. The sensor detection device of the composite gas according to claim 1, wherein the press ring (9) is screwed to the lower opening of the sensor group installation cavity and fastens the sealing gasket (7) and the waterproof and dustproof assembly (8), a through hole is formed in the press ring, the outer end of the through hole is communicated with the public air cavity, and the inner opening of the press ring is in contact with the waterproof and dustproof assembly (8) to form a ventilation structure.
9. The composite gas sensor detection device according to any one of claims 1 to 8, wherein the first PCB (5) is a pin PCB, which is locked on the gas chamber body (10) by a single-ended copper cylinder.
10. The composite gas sensor detection device according to any one of claims 1 to 8, wherein the second PCB (4) is a signal processing PCB, and is locked on the gas chamber body (10) through a single-ended copper cylinder.
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| CN202010267896.5A CN111239350A (en) | 2020-04-08 | 2020-04-08 | Sensor detection device for composite gas |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112345707A (en) * | 2020-11-16 | 2021-02-09 | 湖南碧臣环境能源有限公司 | Gas measuring device |
| CN113671119A (en) * | 2021-08-02 | 2021-11-19 | 德尔格安全设备（中国）有限公司 | Gas detection device and temperature compensation method thereof |
| CN113884622A (en) * | 2021-09-17 | 2022-01-04 | 煤炭科学技术研究院有限公司 | Protective air chamber structure for sensitive element of mining sensor |
| CN114544873A (en) * | 2022-02-18 | 2022-05-27 | 天地（常州）自动化股份有限公司 | Gas probe protection structure |
| CN116660509A (en) * | 2023-06-01 | 2023-08-29 | 青岛瑞谱乐医疗科技有限公司 | Exhaled gas detection method |
| GB2622605A (en) * | 2022-09-22 | 2024-03-27 | Elta Group Ltd | Air quality sensing apparatus |
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