CN220854639U - Receiver for ethylene sensor - Google Patents
Receiver for ethylene sensor Download PDFInfo
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- CN220854639U CN220854639U CN202322522932.XU CN202322522932U CN220854639U CN 220854639 U CN220854639 U CN 220854639U CN 202322522932 U CN202322522932 U CN 202322522932U CN 220854639 U CN220854639 U CN 220854639U
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- chamber
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- optical lens
- light absorption
- light
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- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 239000005977 Ethylene Substances 0.000 title claims abstract description 52
- 230000003287 optical effect Effects 0.000 claims abstract description 42
- 230000031700 light absorption Effects 0.000 claims abstract description 36
- 238000001514 detection method Methods 0.000 claims abstract description 32
- 239000010409 thin film Substances 0.000 claims abstract description 15
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 238000012360 testing method Methods 0.000 claims abstract description 8
- 239000003990 capacitor Substances 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 238000002329 infrared spectrum Methods 0.000 claims description 4
- 239000010408 film Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 39
- 238000000034 method Methods 0.000 description 10
- 238000004364 calculation method Methods 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000010183 spectrum analysis Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002848 electrochemical method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model provides a receiver for an ethylene sensor, wherein a front optical lens and a rear optical lens are arranged in a light absorption chamber, the front optical lens is parallel to the mirror surface of the rear optical lens and is opposite to the mirror surface of the rear optical lens, the front end of the light absorption chamber is provided with an opening, the front optical lens is fixedly arranged at the front end opening of the light absorption chamber and is used for sealing the front end opening, the rear optical lens divides the light absorption chamber into a front chamber and a rear chamber, the front chamber and the rear chamber are filled with oil pure ethylene gas, and the front chamber and the rear chamber are communicated with a signal conversion unit; the thin film electrode is fixedly arranged in the shell and divides the internal space of the shell into a cavity I and a cavity II, the cavity I is communicated with the rear cavity, the cavity II is communicated with the front cavity, the fixed electrode is fixedly arranged in the cavity II, the fixed electrode and the thin film electrode are parallel and are opposite to each other to form a capacitor structure, one end of the detection resistor is electrically connected with the fixed electrode, the other end of the detection resistor is electrically connected with the thin film electrode, the fixed electrode applies test voltage to an external power supply, and a public electric contact between the fixed electrode and the detection resistor is used as a detection signal output point.
Description
Technical Field
The present utility model relates to a sensor device, and in particular to a receiver for an ethylene sensor.
Background
In the prior art, for detecting the concentration of gases, such as carbon monoxide, carbon dioxide, ammonia, methane, sulfur dioxide, nitric oxide and the like, all the existing sensors can monitor, but the existing other sensors can not detect ethylene, however, in order to cope with the environments of industries such as chemical industry, medicines and the like, the detection of ethylene gas is necessary.
In the prior art, the ethylene detection has three ways, namely an electrochemical method, a chemical quantitative method and a meteorological chromatography method; the chemical sensor is a consumable sensor, has short service life, unstable output signals and low precision, and is not suitable for complex industrial field online detection; the chemical quantitative operation is complex, the error is large, the industrial process on-site on-line analysis cannot be performed, and the method can only be used for experimental teaching; the gas chromatography has high requirements on detection environment, is commonly used for laboratory detection, and is not suitable for complex industrial sites.
With the development of technology, although some sensors based on optical detection are proposed, after light passes through ethylene gas with different concentrations, the ethylene has an absorption effect on infrared light in a specific frequency band, and different ethylene concentrations absorb the infrared spectrum, and then the concentration calculation is performed in the following two ways: one is to analyze the spectrum, this way is easy to be interfered by the environment, which causes inaccurate calculation and is difficult to be applied in industrial field, another way is to use gas to absorb infrared light and then the gas itself can generate heat, and then to detect by using Wheatstone bridge and other ways, this way needs to perform corresponding temperature compensation calculation, the process is complex, and the method is greatly affected by the environment and has low accuracy.
Therefore, in order to solve the above technical problems, a new technical means is needed to solve the above technical problems.
Disclosure of utility model
In view of the above, the present utility model is to provide a receiver for an ethylene sensor, after an optical signal passes through an ethylene gas to be detected, the pure ethylene gas in the receiver absorbs infrared light in a specific frequency band in the optical signal, so that the pressure of the pure ethylene gas in the front chamber and the pressure of the pure ethylene gas in the rear chamber are different, and thus the pressure difference exists, and then the pressure difference is converted into an electrical signal for output for subsequent calculation processing, so that the whole test is less interfered by an external environment, the detection accuracy is ensured, and the receiver can be applied to industrial actual scenes.
The utility model provides a receiver for an ethylene sensor, which comprises a light absorption unit and a signal conversion unit;
The light absorption unit is used for receiving the light signal passing through the front-stage detection mechanism of the ethylene sensor, the light absorption unit is provided with pure ethylene gas, and the pure ethylene gas absorbs infrared light in the light signal when receiving the light signal;
The signal conversion unit is used for sensing pressure change of pure ethylene gas after absorbing infrared spectrum, converting the pressure change value into an electric signal and outputting the electric signal; the light absorbing unit comprises a light absorbing chamber, a front optical lens and a rear optical lens;
The front optical lens and the rear optical lens are arranged in the light absorption chamber, the front optical lens is parallel to the mirror surface of the rear optical lens and is opposite to the mirror surface of the rear optical lens, the front end of the light absorption chamber is provided with an opening, the front optical lens is fixedly arranged at the front end opening of the light absorption chamber and is used for sealing the front end opening, the rear optical lens divides the light absorption chamber into a front chamber and a rear chamber, the front chamber and the rear chamber are filled with oil pure ethylene gas, and the front chamber and the rear chamber are communicated with the signal conversion unit;
The signal conversion unit comprises a shell, a fixed electrode, a film electrode and a detection resistor;
The thin film electrode is fixedly arranged in the shell and divides the internal space of the shell into a cavity I and a cavity II, the cavity I is communicated with the rear cavity, the cavity II is communicated with the front cavity, the fixed electrode is fixedly arranged in the cavity II, the fixed electrode and the thin film electrode are parallel and are opposite to each other to form a capacitor structure, one end of the detection resistor is electrically connected with the fixed electrode, the other end of the detection resistor is electrically connected with the thin film electrode, the fixed electrode applies test voltage to an external power supply, and a public electric contact between the fixed electrode and the detection resistor is used as a detection signal output point.
Further, the light absorption units are provided with two groups of light absorption units and have the same structure, the front cavities of the two groups of light absorption units are communicated with the cavity II, and the rear cavities of the two groups of light absorption units are communicated with the cavity I.
Further, the two groups of light absorption units are of symmetrical structures.
Further, the chamber II, the front chamber and the rear chamber are communicated through capillaries.
The utility model has the beneficial effects that: according to the utility model, after the optical signal passes through the ethylene gas to be detected, the infrared light of a specific frequency band in the optical signal is absorbed by the pure ethylene gas in the receiver, so that the pressure of the pure ethylene gas in the front chamber and the pressure of the pure ethylene gas in the rear chamber are different, the pressure difference is formed, the pressure difference is converted into an electric signal to be output for subsequent calculation processing, the whole test is little interfered by the external environment, the detection precision is ensured, and the method can be applied to industrial actual scenes.
Drawings
The utility model is further described below with reference to the accompanying drawings and examples:
Fig. 1 is a schematic structural view of the present utility model.
Detailed Description
The present utility model is described in further detail below:
the utility model provides a receiver for an ethylene sensor, which comprises a light absorption unit and a signal conversion unit;
The light absorption unit is used for receiving the light signal passing through the front-stage detection mechanism of the ethylene sensor, the light absorption unit is provided with pure ethylene gas, and the pure ethylene gas absorbs infrared light in the light signal when receiving the light signal;
The signal conversion unit is used for sensing pressure change of pure ethylene gas after absorbing infrared spectrum, converting the pressure change value into an electric signal and outputting the electric signal; the light absorbing unit comprises a light absorbing chamber, a front optical lens and a rear optical lens;
The front optical lenses (1, 14) and the rear optical lenses (3, 12) are arranged in the light absorption chamber, the front optical lenses are parallel to the mirror surface of the rear optical lenses and are opposite to each other, the front end of the light absorption chamber is provided with an opening, the front optical lenses are fixedly arranged at the front end opening of the light absorption chamber and are used for sealing the front end opening, the rear optical lenses divide the light absorption chamber into front chambers (2, 13) and rear chambers (4, 11), the front chambers and the rear chambers are filled with oil pure ethylene gas, and the front chambers and the rear chambers are communicated with the signal conversion unit;
the signal conversion unit comprises a shell, a fixed electrode 7, a thin film electrode 8 and a detection resistor R;
The thin film electrode is fixedly arranged in the shell and divides the internal space of the shell into a cavity I and a cavity II, the cavity I is communicated with the rear cavity, the cavity II is communicated with the front cavity, the fixed electrode is fixedly arranged in the cavity II, the fixed electrode and the thin film electrode are parallel and are opposite to each other to form a capacitor structure, one end of the detection resistor is electrically connected with the fixed electrode, the other end of the detection resistor is electrically connected with the thin film electrode, the fixed electrode applies test voltage to an external power supply, and a public electric contact between the fixed electrode and the detection resistor is used as a detection signal output point. The whole ethylene sensor comprises a light source, a gas container to be measured, a receiver (i.e. the structure in the embodiment) and a subsequent processing circuit, wherein the light source, the gas container to be measured and the receiver are all arranged in the same container, infrared light with specific frequency in light emitted by the light source is known and determined (can be determined by the existing spectrum analysis method), the gas container to be measured (of course, the container is made of a transparent container, especially a transparent material which is fully transmitted to infrared light) is arranged outside a light absorption chamber and is opposite to a front optical lens, when the gas container to be measured is introduced into the gas container to be measured, the light source emits light towards the container to be measured, after the light signal passes through the gas container to be measured, the ethylene gas in the gas to be measured absorbs part of infrared light with specific frequency band, but the absorption amount is generally smaller, if the error is larger by directly carrying out spectrum analysis or temperature compensation algorithm, the optical signal passes through the receiver in the application again after passing through the ethylene gas container to be detected, then the pure ethylene gas absorbs a large amount of specific infrared light, the absorption capacity of the front chamber is larger than that of the rear chamber, the temperature is increased after the pure ethylene gas absorbs infrared light, the pressure difference of the front chamber and the rear chamber is different due to different absorption capacities and different temperature increases, the thin film electrode is deformed, the capacitance value of the capacitor formed between the thin film electrode and the fixed electrode is changed, the capacitance value is changed, the partial pressure between the capacitor and the detection resistor R is different, and after the change of the voltage signal is output, the voltage signal is processed by a subsequent processing circuit (the existing filtering, amplifying and corresponding AD sampling circuit and the like), then, the ethylene concentration of the gas to be detected is obtained through calculation (the calculation process follows the Law of Lanbert-beer, which is the prior art), after the optical signal passes through the ethylene gas to be detected, the infrared light of a specific frequency band in the optical signal is absorbed through the pure ethylene gas in the receiver, so that the pressure of the pure ethylene gas in the front chamber and the pressure of the pure ethylene gas in the rear chamber are different, the pressure difference exists, the pressure difference is converted into an electric signal to be output for subsequent calculation processing, the whole test is little interfered by the external environment, the detection precision is ensured, and the method can be applied to industrial actual scenes.
In this embodiment, the light absorbing units have two groups and the same structure, the front chambers of the two groups of light absorbing units are all communicated with the chamber ii, and the rear chambers of the two groups of light absorbing units are all communicated with the chamber i, if the absorbing units are single, the absorbing chambers need to be made larger to ensure the absorption of the light signals, then the inner walls of the light absorbing chambers are inconvenient to process, the smoothness of the inner walls of the light absorbing chambers is difficult to ensure (the smoothness of the inner walls is generally required to be close to a mirror surface), so that inaccurate measurement caused by scattering of the side walls of the light signals is avoided, and the side walls of the absorbing chambers are convenient to process by the two groups of structures, thereby ensuring the accuracy of the monitoring result.
In this embodiment, the two groups of light absorbing units are symmetrical structures, and by this structure, the structure of the whole receiver is made stronger, and the absorption of the light signal transmitted through the gas container to be measured is facilitated.
In the embodiment, the chamber II, the front chamber and the chamber I are communicated with the rear chamber through capillaries (5, 6,9 and 10), and by the structure, the pressure is prevented from excessively fluctuating after pure ethylene gas absorbs infrared light so as to be inaccurate in test.
The front and rear are left and right in the drawing, i.e., left is front and right is rear.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered by the scope of the claims of the present utility model.
Claims (4)
1. A receiver for an ethylene sensor, characterized by: comprises a light absorption unit and a signal conversion unit;
The light absorption unit is used for receiving the light signal passing through the front-stage detection mechanism of the ethylene sensor, the light absorption unit is provided with pure ethylene gas, and the pure ethylene gas absorbs infrared light in the light signal when receiving the light signal;
The signal conversion unit is used for sensing pressure change of pure ethylene gas after absorbing infrared spectrum, converting the pressure change value into an electric signal and outputting the electric signal; the light absorbing unit comprises a light absorbing chamber, a front optical lens and a rear optical lens;
The front optical lens and the rear optical lens are arranged in the light absorption chamber, the front optical lens is parallel to the mirror surface of the rear optical lens and is opposite to the mirror surface of the rear optical lens, the front end of the light absorption chamber is provided with an opening, the front optical lens is fixedly arranged at the front end opening of the light absorption chamber and is used for sealing the front end opening, the rear optical lens divides the light absorption chamber into a front chamber and a rear chamber, the front chamber and the rear chamber are filled with oil pure ethylene gas, and the front chamber and the rear chamber are communicated with the signal conversion unit;
The signal conversion unit comprises a shell, a fixed electrode, a film electrode and a detection resistor;
The thin film electrode is fixedly arranged in the shell and divides the internal space of the shell into a cavity I and a cavity II, the cavity I is communicated with the rear cavity, the cavity II is communicated with the front cavity, the fixed electrode is fixedly arranged in the cavity II, the fixed electrode and the thin film electrode are parallel and are opposite to each other to form a capacitor structure, one end of the detection resistor is electrically connected with the fixed electrode, the other end of the detection resistor is electrically connected with the thin film electrode, the fixed electrode applies test voltage to an external power supply, and a public electric contact between the fixed electrode and the detection resistor is used as a detection signal output point.
2. The receiver for an ethylene sensor according to claim 1, wherein: the light absorption units are provided with two groups of light absorption units and have the same structure, the front cavities of the two groups of light absorption units are communicated with the cavity II, and the rear cavities of the two groups of light absorption units are communicated with the cavity I.
3. The receiver for an ethylene sensor according to claim 2, wherein: the two groups of light absorption units are of symmetrical structures.
4. A receiver for an ethylene sensor as claimed in claim 3, characterized in that: the chamber II, the front chamber and the rear chamber are communicated through capillaries.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322522932.XU CN220854639U (en) | 2023-09-15 | 2023-09-15 | Receiver for ethylene sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322522932.XU CN220854639U (en) | 2023-09-15 | 2023-09-15 | Receiver for ethylene sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220854639U true CN220854639U (en) | 2024-04-26 |
Family
ID=90745841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322522932.XU Active CN220854639U (en) | 2023-09-15 | 2023-09-15 | Receiver for ethylene sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220854639U (en) |
-
2023
- 2023-09-15 CN CN202322522932.XU patent/CN220854639U/en active Active
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