CN108241006B - Gas-sensitive characteristic response curve testing device with stirring blades - Google Patents
Gas-sensitive characteristic response curve testing device with stirring blades Download PDFInfo
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- CN108241006B CN108241006B CN201810033525.3A CN201810033525A CN108241006B CN 108241006 B CN108241006 B CN 108241006B CN 201810033525 A CN201810033525 A CN 201810033525A CN 108241006 B CN108241006 B CN 108241006B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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Abstract
The invention discloses a gas-sensitive characteristic response curve testing device with stirring blades, wherein a heating plate is arranged at the bottom of a sample carrier, and the top surface of the sample carrier is used for bearing a gas-sensitive material to be tested; the flange plate is provided with a first air inlet pipe, a second air inlet pipe and an air outlet pipe, wherein the air outlet end of the second air inlet pipe is connected with a universal bamboo joint pipe; a stirring bracket is arranged in the inner cavity of the inner cover, a group of driven magnets are fixedly arranged at the outer end of the stirring bracket along the circumferential direction, the driven magnets are N-pole magnets, and the outer circular surface of the driven magnets is in rotary fit with the inner wall of the inner cover; the center of the stirring bracket is coaxially and fixedly provided with a connecting shaft, and a group of stirring blades are uniformly distributed at two ends of the connecting shaft along the circumferential direction. On the basis of the existing structure, the non-detachable transparent inner cover is additionally arranged, the inner cavity of the inner cover is insulated from the outside, and therefore the gas-sensitive material to be tested can be isolated from the outside temperature, and the influence of the outside temperature on the gas-sensitive characteristic is avoided.
Description
Technical Field
The invention belongs to the field of gas-sensitive materials and gas-sensitive sensors, and particularly relates to a gas-sensitive characteristic response curve testing device with stirring blades, which can be used in other fields related to gas pressure and components.
Background
As is well known to those skilled in the art, gas sensors are made of gas sensitive materials, devices or means for measuring the type, concentration and composition of a gas, detecting a specific composition in the gas, and converting a parameter of the composition into an electrical signal, and are also referred to as gas sensors. The gas sensor is mainly applied to the following steps: carbon monoxide gas detection, freon (R11, R12) detection, ethanol detection in expired air, detection of halitosis of human body, etc.
The gas-sensitive characteristic response curve of the gas-sensitive material is an important parameter of the gas-sensitive material, and is related to the detection precision of the gas-sensitive sensor, and the gas-sensitive characteristic response curve is closely related to factors such as temperature, light, gas purity and the like. Currently, a gas-sensitive material is generally fixed on an open type bench, two electrodes are used for contacting the gas-sensitive material, and the gas-sensitive characteristic response curve of the gas-sensitive material is tested when the gas blows across the surface of the gas-sensitive material or the gas to be detected is used as an atmosphere to surround the gas-sensitive material.
During the detection, we found that the prior art has the following drawbacks:
1. because the existing testing device is of an open structure and is in contact with the outside temperature, light and impurities, the influence of the outside temperature, light and impurities on the gas-sensitive characteristic cannot be isolated, and therefore the testing accuracy of the gas-sensitive characteristic response curve is low;
2. the existing structure is an open structure, and the gas-sensitive material adsorbs gas, so that the gas is unstable in the near-surface state of the gas-sensitive material to be tested during testing, the randomness is large, the variation is irregular, the reliability of a test result is low, the repeatability of test data is poor, and the gas-sensitive test is meaningless.
3. In the course of academic research, we find that in some test environments, the gas concentration and temperature field near the gas-sensitive material to be tested need to be uniform, so as to avoid interference and obstruction to the test caused by the non-uniformity of the gas concentration and temperature field, but the prior art cannot solve the problem.
4. During testing, light rays with specific wavelengths can be loaded on the premise of shielding external temperature, light rays and impurities so as to study the influence of the light rays on the gas-sensitive characteristic response curve, however, the prior art cannot meet the technical requirement at all.
Disclosure of Invention
The invention aims to solve the technical problem of providing a gas-sensitive characteristic response curve testing device with stirring blades, which aims to improve the testing precision and reliability of the gas-sensitive characteristic response curve and can make the gas concentration and the temperature field near the gas-sensitive material uniform.
The technical scheme of the invention is as follows: the utility model provides a take gas-sensitive characteristic response curve testing arrangement of stirring leaf which characterized in that: the device comprises a sample carrier (1) and an inner cover (10), wherein a heating plate (2) is arranged at the bottom of the sample carrier (1), the top surface of the sample carrier is used for bearing a gas-sensitive material to be tested, the first probe (3) and the second probe (4) are contacted with the surface of the gas-sensitive material to be tested during testing, the two probes are respectively arranged on corresponding installation components, and the sample carrier (1) and the adjustment component are both arranged on a flange plate (5); the flange plate (5) is provided with a first air inlet pipe (6), a second air inlet pipe (7) and an air outlet pipe (8), wherein the air outlet end of the second air inlet pipe (7) is connected with a universal bamboo joint pipe (9), the first air inlet pipe (6) and the second air inlet pipe (7) are positioned above the sample carrier (1), and the universal bamboo joint pipe (9) is close to the top surface of the sample carrier;
the inner cover (10) is a transparent cover, the inner cover covers the sample carrying platform (1), the heating plate (2), the first probe (3), the second probe (4), the first air inlet pipe (6), the second air inlet pipe (7), the air outlet pipe (8) and the universal bamboo joint pipe (9), the opening end of the inner cover (10) is fixed with the outer circular surface of the flange plate (5), and the inner cover (10) is sealed with the flange plate (5) through an o-shaped ring (11); the outer surface of the inner cover (10) is covered with an outer cover (12), the inner cover is an opaque cover, the opening end of the inner cover (10) is detachably fixed with the outer circular surface of the flange plate (5), and the outer wall of the outer cover (12) is provided with a light loading opening (12 a) which can be opened and closed; a stirring bracket (30) is arranged in the inner cavity of the inner cover (10), a group of driven magnets (31) are fixedly arranged at the outer end of the stirring bracket along the circumferential direction, the driven magnets (31) are N-pole magnets, and the outer circular surface of the driven magnets (31) is in running fit with the inner wall of the inner cover (10); a connecting shaft (32) is coaxially and fixedly arranged at the center of the stirring bracket (30), and a group of stirring blades (33) are uniformly distributed at two ends of the connecting shaft along the circumferential direction; a rotating frame (34) is arranged between the inner cover (10) and the outer cover (12), and the connecting end of the rotating frame is connected with the output shaft of the driving motor (35) and can rotate under the driving of the driving motor (35); the rotating frame (34) is fixedly provided with driving magnets (36) along the circumferential direction, the driving magnets (36) are in one-to-one correspondence with the stirring blades (33), and the driving magnets (36) are S-pole magnets.
On the basis of the existing structure, the non-detachable transparent inner cover (10) is additionally arranged, and the inner cavity of the inner cover (10) is insulated from the outside, so that the gas-sensitive material to be tested can be isolated from the outside temperature, and the influence of the outside temperature on the gas-sensitive characteristic is avoided; meanwhile, the detachable opaque outer cover is added, so that the influence of external light on the gas-sensitive characteristic can be isolated, the gas state of the near-surface of the gas-sensitive material to be tested is stable, the testing precision and the reliability of the gas-sensitive characteristic response curve are improved, and the influence of external light on the gas-sensitive characteristic can be tested; in addition, the outer cover is provided with a light loading port, so that light rays with specific wavelengths can be conveniently loaded, and the possibility is provided for researching the influence of the light rays with specific wavelengths on the gas-sensitive characteristic; moreover, the stirring blade is driven to rotate in a non-contact mode, so that gas and air in the inner cover are stirred, the gas concentration and the temperature field near the gas-sensitive material to be tested are uniform, the interference and the obstruction to the test caused by the non-uniformity of the gas concentration and the temperature field are avoided, and the influence of the non-contact rotation mode on the temperature of the gas-sensitive test is small.
Preferably, the mounting assembly comprises a horizontal swing arm (13) and a vertical swing arm (16), wherein one end of the horizontal swing arm (13) is clamped into a notch of a base (14) and is fixed with the base (14) through a vertically arranged connecting screw (15), the base (14) is fixed on the flange plate (5), and a U-shaped notch which penetrates up and down is formed in the other end of the horizontal swing arm (13); the middle part of the vertical swing arm (16) is clamped into a U-shaped notch of the horizontal swing arm (13) and is connected with the horizontal swing arm (13) through a horizontally arranged pin (17), the top of the vertical swing arm is connected with an adjusting screw (18), and the tail part of the adjusting screw is contacted with the top surface of the horizontal swing arm (13); the bottom of the horizontal swing arm (13) is provided with a mounting hole, and after the first probe (3) or the second probe (4) passes through the mounting hole, the first probe or the second probe is locked by a locking screw (19) on the horizontal swing arm (13).
By adopting the technical scheme, the position of the first probe (3) or the second probe (4) and the pressure applied to the gas-sensitive material to be tested can be conveniently adjusted, and the mounting assembly is simple in structure, convenient to adjust and labor-saving.
Preferably, the stirring bracket (30) has a cross-shaped structure, and four suspension ends of the stirring bracket are respectively fixedly provided with one driven magnet (31). By adopting the structure, the structure is simplified as much as possible on the premise of ensuring the rotation balance.
In this case, the inner cover (10) is a quartz cover, the outer cover (12) is a ceramic cover, and the heating plate (2) is a ceramic heating plate. In the technical scheme, the ceramic cover has good light shielding performance, and can effectively realize light shielding.
The beneficial effects are that: on the basis of the existing structure, the non-detachable transparent inner cover (10) is additionally arranged, and the inner cavity of the inner cover (10) is insulated from the outside, so that the gas-sensitive material to be tested can be isolated from the outside temperature, and the influence of the outside temperature on the gas-sensitive characteristic is avoided; meanwhile, the detachable opaque outer cover is added, so that the influence of external light on the gas-sensitive characteristic can be isolated, the gas state of the near-surface of the gas-sensitive material to be tested is stable, the testing precision and the reliability of the gas-sensitive characteristic response curve are improved, and the influence of external light on the gas-sensitive characteristic can be tested; in addition, the outer cover is provided with a light loading port, so that light rays with specific wavelengths can be conveniently loaded, and the possibility is provided for researching the influence of the light rays with specific wavelengths on the gas-sensitive characteristic; moreover, the stirring blade is driven to rotate in a non-contact mode, so that gas and air in the inner cover are stirred, the gas concentration and the temperature field near the gas-sensitive material to be tested are uniform, the interference and the obstruction to the test caused by the non-uniformity of the gas concentration and the temperature field are avoided, and the influence of the non-contact rotation mode on the temperature of the gas-sensitive test is small.
Drawings
Fig. 1 is a schematic structural view of the present invention.
FIG. 2 is an isometric view of the test unit of FIG. 1 with the housing and drive motor removed.
Fig. 3 is a schematic view of fig. 2 with the inner cover removed.
Fig. 4 is a schematic diagram illustrating the cooperation between the driven magnet and the driving magnet in fig. 2.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
as shown in fig. 1-4, a gas-sensitive characteristic response curve testing device with stirring blades comprises a sample carrier 1 and an inner cover 10, wherein a heating plate 2 is arranged at the bottom of the sample carrier 1, the top surface of the sample carrier 1 is used for bearing a gas-sensitive material to be tested, and the heating plate 2 is a ceramic heating plate. The first probe 3 and the second probe 4 are of existing structures, the two probes are in surface contact with the gas-sensitive material to be tested during testing, the two probes are respectively installed on corresponding installation components, and the sample carrier 1 and the adjusting component are both installed on the flange 5. The first probe 3 and the second probe 4 are respectively connected with the measuring instrument through corresponding leads, the connection mode is an existing structure, details are not repeated here, and the flange 5 is provided with a lead through hole.
In this case, the installation component includes horizontal swing arm 13, vertical swing arm 16, and wherein horizontal swing arm 13 one end card is gone into in the breach of base 14 to be fixed with base 14 through the connecting screw 15 of vertical setting, this base 14 is fixed on ring flange 5, and horizontal swing arm 13 other end is opened and is had the U-shaped breach that link up from top to bottom. In this case, the tail of the base 14 is tightly fitted in the mounting hole on the flange 5 through an insulating sleeve (not shown in the figure) to prevent the electrical signals of the two probes from being shorted, and ensure that the gas-sensitive characteristic response curve test is smoothly performed. The middle part of the vertical swing arm 16 is clamped into the U-shaped notch of the horizontal swing arm 13 and is connected with the horizontal swing arm 13 through a horizontally arranged pin 17, the top of the vertical swing arm is connected with an adjusting screw 18, and the tail part of the adjusting screw is contacted with the top surface of the horizontal swing arm 13. The bottom of the horizontal swing arm 13 is provided with a mounting hole through which the first probe 3 or the second probe 4 passes and is locked by a locking screw 19 on the horizontal swing arm 13.
The flange plate 5 is provided with a first air inlet pipe 6, a second air inlet pipe 7 and an air outlet pipe 8, wherein the air outlet end of the second air inlet pipe 7 is connected with a universal bamboo joint pipe 9, and the air outlet end of the universal bamboo joint pipe 9 is a horn mouth. The first air inlet pipe 6 and the second air inlet pipe 7 are positioned above the sample carrying platform 1, the universal bamboo joint pipe 9 is close to the top surface of the sample carrying platform 1, and the air outlet end of the universal bamboo joint pipe 9 is flat. The air outlet pipe 8 is positioned below the sample carrying platform 1, and the first air inlet pipe 6, the second air inlet pipe 7 and the air outlet pipe 8 are positioned on the same side of the flange plate 5. The first air inlet pipe 6 and the second air inlet pipe 7 can be used in the static method test, and the second air inlet pipe 7 can only be used in the dynamic method test.
As shown in fig. 1, 2, 3 and 4, the inner cover 10 is a transparent cover, and is preferably a quartz cover. The inner cover 10 covers the sample carrier 1, the heating plate 2, the first probe 3, the second probe 4, the first air inlet pipe 6, the second air inlet pipe 7, the air outlet pipe 8 and the universal bamboo joint pipe 9, the opening end of the inner cover 10 is fixed with the outer circular surface of the flange plate 5, the inner cover 10 is sealed with the flange plate 5 through the o-shaped ring 11, and therefore the temperature isolation between the inner cavity of the inner cover 10 and the outside can be realized to the greatest extent.
The outer face of the inner cover 10 is covered with an outer cover 12, which inner cover 12 is an opaque cover and is preferably a ceramic cover. The open end of the inner cover 10 is detachably fixed with the outer circular surface of the flange 5, and the outer wall of the outer cover 12 is provided with a light loading opening 12a which can be opened and closed, when light with specific wavelength needs to be loaded, the light loading opening 12a is opened, and the loaded light penetrates through the inner cover 10, so that the influence of the light with specific wavelength on the gas-sensitive property of the gas-sensitive material can be studied. It should be noted that in some test cases, it is necessary to study the interference of the external light with the gas-sensitive property, and then the cover 12 needs to be removed.
The inner chamber of the inner cover 10 is provided with a stirring bracket 30, a group of driven magnets 31 are fixedly arranged at the outer end of the stirring bracket along the circumferential direction, the driven magnets 31 are N-pole magnets, and the outer circular surface of the driven magnets 31 is in rotary fit with the inner wall of the inner cover 10. A connecting shaft 32 is coaxially and fixedly arranged at the center of the stirring bracket 30, and a group of stirring blades 33 are uniformly distributed at two ends of the connecting shaft along the circumferential direction. A rotating frame 34 is arranged between the inner cover 10 and the outer cover 12, and the connecting end of the rotating frame is connected with an output shaft and can rotate under the drive of a driving motor 35. The rotating frame 34 is fixedly provided with driving magnets 36 along the circumferential direction, the driving magnets 36 are in one-to-one correspondence with the stirring blades 33, and the driving magnets 36 are magnets of S poles. The stirring bracket 30 has a cross-shaped structure, and four suspended ends of the stirring bracket are respectively fixedly provided with a driven magnet 31.
When the driving motor 33 is started, the rotating frame 32 is driven to rotate, the rotating frame 32 drives the driving magnet 34 to rotate together, and the driving magnet 34 drives the driven magnet 31 to rotate through magnetism, so that the stirring blade 33 is driven to rotate for stirring.
As shown in fig. 1, 2 and 3, a sample carrier 1, a heating plate 2, a first probe 3, a second probe 4, a flange 5, a first air inlet pipe 6, a second air inlet pipe 7, an air outlet pipe 8, a universal bamboo joint pipe 9, an inner cover 10, an o-shaped ring 11, an outer cover 12 and a mounting assembly form a test unit, the 4 test units are horizontally arranged at equal intervals, the flange 5 of each test unit is fixed on a vertical plate 20, and the bottom of the vertical plate 20 is fixed on the top surface of a horizontal bottom plate 21. When the gas sensitive material is manufactured, a plurality of pieces are often manufactured in batches, and the gas sensitive property of the gas sensitive material can change along with the time, so that 4 samples can be measured simultaneously by adopting 4 test units, the adverse effect of time on the gas sensitive property test is reduced, the detection efficiency is not improved, and the design is not conventional and has creativity.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (2)
1. The utility model provides a take gas-sensitive characteristic response curve testing arrangement of stirring leaf which characterized in that: the device comprises a sample carrier (1) and an inner cover (10), wherein a heating plate (2) is arranged at the bottom of the sample carrier (1), the top surface of the sample carrier is used for bearing a gas-sensitive material to be tested, the first probe (3) and the second probe (4) are contacted with the surface of the gas-sensitive material to be tested during testing, the two probes are respectively arranged on corresponding installation components, and the sample carrier (1) and the adjustment component are both arranged on a flange plate (5); the flange plate (5) is provided with a first air inlet pipe (6), a second air inlet pipe (7) and an air outlet pipe (8), wherein the air outlet end of the second air inlet pipe (7) is connected with a universal bamboo joint pipe (9), the first air inlet pipe (6) and the second air inlet pipe (7) are positioned above the sample carrier (1), and the universal bamboo joint pipe (9) is close to the top surface of the sample carrier;
the inner cover (10) is a transparent cover, the inner cover covers the sample carrying platform (1), the heating plate (2), the first probe (3), the second probe (4), the first air inlet pipe (6), the second air inlet pipe (7), the air outlet pipe (8) and the universal bamboo joint pipe (9), the opening end of the inner cover (10) is fixed with the outer circular surface of the flange plate (5), and the inner cover (10) is sealed with the flange plate (5) through an o-shaped ring (11); the outer surface of the inner cover (10) is covered with an outer cover (12), the inner cover is an opaque cover, the opening end of the inner cover (10) is detachably fixed with the outer circular surface of the flange plate (5), and the outer wall of the outer cover (12) is provided with a light loading opening (12 a) which can be opened and closed; a stirring bracket (30) is arranged in the inner cavity of the inner cover (10), a group of driven magnets (31) are fixedly arranged at the outer end of the stirring bracket along the circumferential direction, the driven magnets (31) are N-pole magnets, and the outer circular surface of the driven magnets (31) is in running fit with the inner wall of the inner cover (10); a connecting shaft (32) is coaxially and fixedly arranged at the center of the stirring bracket (30), and a group of stirring blades (33) are uniformly distributed at two ends of the connecting shaft along the circumferential direction; a rotating frame (34) is arranged between the inner cover (10) and the outer cover (12), and the connecting end of the rotating frame is connected with the output shaft of the driving motor (35) and can rotate under the driving of the driving motor (35); the rotating frame (34) is fixedly provided with driving magnets (36) along the circumferential direction, the driving magnets (36) are in one-to-one correspondence with the stirring blades (33), and the driving magnets (36) are S-pole magnets;
the mounting assembly comprises a horizontal swing arm (13) and a vertical swing arm (16), wherein one end of the horizontal swing arm (13) is clamped into a notch of a base (14) and is fixed with the base (14) through a vertically arranged connecting screw (15), the base (14) is fixed on the flange plate (5), and the other end of the horizontal swing arm (13) is provided with a U-shaped notch which is penetrated up and down; the middle part of the vertical swing arm (16) is clamped into a U-shaped notch of the horizontal swing arm (13) and is connected with the horizontal swing arm (13) through a horizontally arranged pin (17), the top of the vertical swing arm is connected with an adjusting screw (18), and the tail part of the adjusting screw is contacted with the top surface of the horizontal swing arm (13); the bottom of the horizontal swing arm (13) is provided with a mounting hole, and after the first probe (3) or the second probe (4) passes through the mounting hole, the first probe or the second probe is locked by a locking screw (19) on the horizontal swing arm (13);
the stirring support (30) is of a cross-shaped structure, and the four suspension ends of the stirring support are respectively fixedly provided with one driven magnet (31).
2. The stirring vane equipped gas sensitive characteristic response curve testing device according to claim 1, wherein: the inner cover (10) is a quartz cover, the outer cover (12) is a ceramic cover, and the heating plate (2) is a ceramic heating plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810033525.3A CN108241006B (en) | 2018-01-11 | 2018-01-11 | Gas-sensitive characteristic response curve testing device with stirring blades |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810033525.3A CN108241006B (en) | 2018-01-11 | 2018-01-11 | Gas-sensitive characteristic response curve testing device with stirring blades |
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| CN108241006A CN108241006A (en) | 2018-07-03 |
| CN108241006B true CN108241006B (en) | 2023-05-12 |
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