CN212845013U - Integrated gas detection device - Google Patents
Integrated gas detection device Download PDFInfo
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- CN212845013U CN212845013U CN202021263789.7U CN202021263789U CN212845013U CN 212845013 U CN212845013 U CN 212845013U CN 202021263789 U CN202021263789 U CN 202021263789U CN 212845013 U CN212845013 U CN 212845013U
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Abstract
The utility model discloses an integrated gas detection device, which comprises a gas absorption cell and a receiving and transmitting integrated mechanism, wherein the gas absorption cell comprises an air chamber, a reflector group and an adjusting mechanism, and the reflector group comprises a first reflector, a second reflector, a third reflector and a fourth reflector; the adjusting mechanism comprises a first adjusting device and a second adjusting device, the first adjusting device is connected with the first reflector, and the second adjusting device is connected with the fourth reflector; the integrated transceiver mechanism comprises a laser and a detector. The utility model provides a technical scheme's beneficial effect is: the laser beam emitted into the air chamber is emitted from the same side through the reflector group, so that the laser and the detector are positioned on the same side of the air chamber and can be integrated into a whole, the size of the device is reduced, and the stability of the device is improved; the angles of the first reflector and the fourth reflector are adjusted through the adjusting mechanism, so that the optical path of the laser beam in the air chamber can be adjusted, the optical path can reach the optimal optical path, and the detection precision is improved.
Description
Technical Field
The utility model belongs to the technical field of gaseous detection technique and specifically relates to a gaseous detection device of integrated form is related to.
Background
The gas detection technology based on the TDLAS principle is a novel technology with wide development prospect. The principle is as follows: each gas molecule has a characteristic absorption spectrum, so when a laser beam emitted by a laser passes through a gas absorption cell filled with gas to be measured, if the emission spectrum of the laser beam is overlapped with the absorption spectrum of the gas to be measured, the power of the laser beam can be weakened, and the concentration of the gas to be measured can be determined by measuring the power variation before and after the laser beam passes through the gas absorption cell.
Traditional gaseous detection device based on TDLAS principle includes laser instrument, gaseous absorption cell and detector, and laser instrument, gaseous absorption cell and detector separation to cause gaseous detection device bulky, stability relatively poor.
Meanwhile, the optical path of the conventional gas detection device based on the TDLAS principle is preset and cannot be adjusted, the optical path of the laser beam has a great influence on the detection accuracy of the gas detection device, and the detection accuracy of the gas detection device is reduced if the optical path is too short or too long, so that the conventional gas detection device cannot enable the optical path of the laser beam to reach an optimal value, and the detection accuracy of the gas detection device is not high.
SUMMERY OF THE UTILITY MODEL
In view of the above, there is a need to provide a gas detection apparatus that overcomes the drawbacks of the existing gas detection apparatus, such as large volume, poor stability, and low detection accuracy due to the non-adjustable optical path.
An integrated gas detection device comprising: a gas absorption cell and a receiving and transmitting integrated mechanism,
the gas absorption cell comprises a gas chamber, a reflector group and an adjusting mechanism, the gas chamber is provided with an absorption cavity, the gas chamber is provided with a left side wall and a right side wall, the left side wall and the right side wall are oppositely arranged, and the left side wall is provided with a light input port and a light receiving port which are communicated with the absorption cavity;
the reflector group comprises a first reflector, a second reflector, a third reflector and a fourth reflector which are arranged in the absorption cavity, the first reflector is rotatably connected to the inner side surface of the right side wall, the second reflector is fixedly connected to the inner side surface of the left side wall, the third reflector is fixedly connected to the inner side surface of the right side wall, and the fourth reflector is rotatably connected to the inner side surface of the right side wall;
the adjusting mechanism comprises a first adjusting device and a second adjusting device, the first adjusting device is connected with the first reflecting mirror, and the second adjusting device is connected with the fourth reflecting mirror;
the receiving and transmitting integrated mechanism comprises a laser and a detector, the laser is arranged at the light input port and used for emitting laser beams into the absorption cavity from the light input port, and the detector is arranged at the light receiving port and used for detecting the laser beams emitted from the light receiving port.
Compared with the prior art, the utility model provides a technical scheme's beneficial effect is: the laser beam emitted into the gas chamber is emitted from the same side through the reflector group, so that the laser and the detector are positioned on the same side of the gas chamber and can be integrated into a whole, the volume of the gas detection device is reduced, and the stability of the gas detection device is improved; the angles of the first reflector and the fourth reflector are adjusted through the adjusting mechanism, so that the optical path of the laser beam in the air chamber can be adjusted, the optical path can reach the optimal optical path, and the detection precision of the gas detection device is improved.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of an integrated gas detection device provided by the present invention;
FIG. 2 is an enlarged view of a portion of region A of FIG. 1;
in the figure: 1-gas absorption cell, 2-transceiver integrated mechanism, 3-control circuit, 11-gas chamber, 111-left side wall, 112-right side wall, 121-first reflector, 122-second reflector, 123-third reflector, 124-fourth reflector, 131-first adjusting device, 1311-first nut, 1312-first screw, 132-second adjusting device, 1321-second nut, 1322-second screw, 14-first rotating shaft, 15-second rotating shaft, 21-laser, 211-laser chip, 212-collimating lens, 213-optical isolator, 22-detector and 23-transceiver box.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, the present invention provides an integrated gas detection device, which includes a gas absorption cell 1 and a transceiver 2.
Referring to fig. 1, the gas absorption cell 1 includes a gas chamber 11, a mirror group and an adjusting mechanism, the gas chamber 11 has an absorption cavity, the gas chamber 11 has a left sidewall 111 and a right sidewall 112, the left sidewall 111 and the right sidewall 112 are disposed opposite to each other, and the left sidewall 111 is provided with a light input port and a light receiving port which are communicated with the absorption cavity.
Referring to fig. 1, the mirror group includes a first mirror 121, a second mirror 122, a third mirror 123 and a fourth mirror 124 installed in the absorption cavity, the first mirror 121 is rotatably connected to the inner side surface of the right sidewall 112, the second mirror 122 is fixedly connected to the inner side surface of the left sidewall 111, the third mirror 123 is fixedly connected to the inner side surface of the right sidewall 112, and the fourth mirror 124 is rotatably connected to the inner side surface of the right sidewall 112.
Referring to fig. 1, the adjusting mechanism includes a first adjusting device 131 and a second adjusting device 132, the first adjusting device 131 is connected to the first reflector 121 and is used for adjusting the angle of the first reflector 121, and the second adjusting device 132 is connected to the fourth reflector 124 and is used for adjusting the angle of the fourth reflector 124. In this embodiment, the first reflector 121 and the fourth reflector 124 are symmetrically disposed, so that when the laser beam incident into the gas chamber 11 is along the horizontal direction, the laser beam emitted from the gas chamber 11 is also along the horizontal direction, so as to facilitate installation of the laser 21 and the detector 22. It should be noted that: the direction of the laser beam incident into the air chamber 11 may also be other than the horizontal direction, and the present invention does not limit the direction of the laser beam incident into the air chamber 11, and for convenience of describing the working principle of the present device, the present embodiment is described by taking the direction of the laser beam incident into the air chamber 11 as the horizontal direction.
Referring to fig. 1, the transceiver 2 includes a laser 21 and a detector 22, the laser 21 is disposed at the light input port and is configured to inject a laser beam into the absorption cavity from the light input port, and the detector 22 is disposed at the light receiving port and is configured to detect the laser beam emitted from the light receiving port.
The utility model provides an integrated gas detection device is when using, let in the gas chamber 11 with the gas that awaits measuring, laser instrument 21 jets into laser beam along the horizontal direction from the light input port to the absorption cavity, laser beam passes through first speculum 121, second speculum 122, the reflection of third speculum 123 and fourth speculum 124 in proper order, finally jets out from the light receiving port and is detected by detector 22, the power of laser beam that detects according to detector 22 finally compares with the power of laser beam when shooting out from laser instrument 21, so as to obtain the concentration of the gas that awaits measuring, adjust the angle of first speculum 121 and fourth speculum 124 through first adjusting device 131 and second adjusting device 132 respectively, thereby can change the reflection number of times of laser beam on second speculum 122 and third speculum 123, thereby change the optical path of laser beam in gas chamber 11, so as to make the optical path reach best optical path, thereby improving the accuracy of gas detection.
Preferably, referring to fig. 2, a first rotating shaft 14 is fixed to a back surface of the first reflector 121, and the first rotating shaft 14 is rotatably connected to a sidewall of the gas chamber 11.
Preferably, referring to fig. 1, a second rotating shaft 15 is fixed to a back surface of the fourth reflecting mirror 124, and the second rotating shaft 15 is rotatably connected to a sidewall of the gas chamber 11.
Specifically, referring to fig. 2, the first adjusting device 131 includes a first nut 1311 and a first screw 1312, the first nut 1311 is fixed on the right sidewall 112, the first screw 1312 is in threaded connection with the first nut 1311, and one end of the first screw 1312 is hinged to the back of the first reflector 121. In use, the first screw 1312 is rotated, so that the length of the first screw 1312 in the gas chamber 11 is changed, and the angle of the first mirror 121 is changed, so as to adjust the optical path length of the laser beam.
Specifically, referring to fig. 1, the second adjusting device 132 includes a second nut 1321 and a second screw 1322, the second nut 1321 is fixed on the right sidewall 112, the second screw 1322 is in threaded connection with the second nut 1321, and one end of the second screw 1322 is hinged to the back surface of the fourth reflector 124. In use, the second screw 1322 is rotated, so that the length of the second screw 1322 in the gas chamber 11 is changed, thereby changing the angle of the fourth mirror 124 to adjust the optical path length of the laser beam.
Further, referring to fig. 1, the laser 21 includes a laser chip 211 and a collimating lens 212 sequentially arranged along a predetermined optical axis, wherein the laser chip 211 is configured to emit a laser beam; the collimating lens 212 is configured to convert the laser beam emitted by the laser chip 211 into parallel light.
Preferably, referring to fig. 1, the laser 21 further includes an optical isolator 213, and the optical isolator 213 is located on the predetermined optical axis and on a side of the collimating lens 212 away from the laser chip 211. The optical isolator 213 allows only one-way light to pass through, thereby allowing only the laser beam emitted from the laser chip 211 to pass through, but not the laser beam to be reflected back to the laser chip 211.
Specifically, referring to fig. 1, the transceiver-integrated mechanism 2 further includes a transceiver box 23, the transceiver box 23 has a transceiver cavity, the laser 21 and the detector 22 are both located in the transceiver cavity, and the transceiver box 23 is fixedly connected to the gas chamber 11. The laser 21, the detector 22, and the gas cell 11 are integrally fixed by fixing the laser 21 and the detector 22 by the transceiver box 23.
Further, please refer to fig. 1, the integrated gas detection device of the present invention further includes a control circuit 3, wherein the control circuit 3 is electrically connected to the laser 21 and the detector 22. The control circuit 3 controls the laser 21 and the detector 22 to operate to realize functions, thereby improving the intelligent degree of the gas detection device.
For better understanding of the present invention, the working process of the integrated gas detection device provided by the present invention is described in detail below with reference to fig. 1 and 2: when in use, gas to be detected is introduced into the gas chamber 11, the laser 21 injects a laser beam into the absorption cavity from the light input port along the horizontal direction, the laser beam is reflected by the first reflector 121, the second reflector 122, the third reflector 123 and the fourth reflector 124 in sequence, and finally is emitted from the light receiving port and detected by the detector 22, and finally, according to the power of the laser beam detected by the detector 22 and the power of the laser beam emitted from the laser 21, to obtain the concentration of the gas to be measured, the first screw 1312 and the second screw 1322 are respectively rotated to adjust the angles of the first reflector 121 and the fourth reflector 124, so that the number of reflections of the laser beam on the second and third mirrors 122 and 123 can be changed, thereby changing the optical path of the laser beam in the gas chamber 11 to make the optical path reach the optimal optical path, thereby improving the accuracy of gas detection.
To sum up, the laser beam emitted into the air chamber 11 is emitted from the same side through the reflector set, so that the laser 21 and the detector 22 are positioned at the same side of the air chamber 11 and can be integrated into a whole, thereby reducing the volume of the gas detection device and improving the stability of the gas detection device; the angles of the first reflector 121 and the fourth reflector 124 are adjusted by the adjusting mechanism, so that the optical path of the laser beam in the gas chamber 11 can be adjusted, the optical path can reach the optimal optical path, and the detection precision of the gas detection device is improved.
The above description of the present invention does not limit the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the scope of the claims of the present invention.
Claims (8)
1. An integrated gas detection device, comprising: a gas absorption cell and a receiving and transmitting integrated mechanism,
the gas absorption cell comprises a gas chamber, a reflector group and an adjusting mechanism, the gas chamber is provided with an absorption cavity, the gas chamber is provided with a left side wall and a right side wall, the left side wall and the right side wall are oppositely arranged, and the left side wall is provided with a light input port and a light receiving port which are communicated with the absorption cavity;
the reflector group comprises a first reflector, a second reflector, a third reflector and a fourth reflector which are arranged in the absorption cavity, the first reflector is rotatably connected to the inner side surface of the right side wall, the second reflector is fixedly connected to the inner side surface of the left side wall, the third reflector is fixedly connected to the inner side surface of the right side wall, and the fourth reflector is rotatably connected to the inner side surface of the right side wall;
the adjusting mechanism comprises a first adjusting device and a second adjusting device, the first adjusting device is connected with the first reflecting mirror, and the second adjusting device is connected with the fourth reflecting mirror;
the receiving and transmitting integrated mechanism comprises a laser and a detector, the laser is arranged at the light input port and used for emitting laser beams into the absorption cavity from the light input port, and the detector is arranged at the light receiving port and used for detecting the laser beams emitted from the light receiving port.
2. The integrated gas detection device according to claim 1, wherein a first rotation shaft is fixed to a back surface of the first reflector, and the first rotation shaft is rotatably connected to a sidewall of the gas chamber.
3. The integrated gas detection device according to claim 1, wherein a second rotation shaft is fixed to a back surface of the fourth reflector, and the second rotation shaft is rotatably connected to a side wall of the gas chamber.
4. The integrated gas detection device according to claim 1, wherein the first adjustment device comprises a first nut fixed to the right sidewall and a first screw threadedly coupled to the first nut, one end of the first screw being hinged to the back surface of the first reflector.
5. The integrated gas detection device according to claim 1, wherein the second adjustment device comprises a second nut fixed to the right sidewall and a second screw threadedly coupled to the second nut, one end of the second screw being hinged to the back surface of the fourth reflector.
6. The integrated gas detection device according to claim 1, wherein the laser comprises a laser chip and a collimating lens arranged in sequence along a predetermined optical axis,
the laser chip is used for emitting laser beams;
the collimating lens is used for converting the laser beam emitted by the laser chip into parallel light.
7. The integrated gas detection device according to claim 6, wherein the laser further comprises an optical isolator located on the predetermined optical axis and on a side of the collimating lens remote from the laser chip.
8. The integrated gas detection device of claim 1, wherein the transceiver block further comprises a transceiver box having a transceiver cavity, the laser and the detector are both located in the transceiver cavity, and the transceiver box is fixedly connected to the gas chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021263789.7U CN212845013U (en) | 2020-06-30 | 2020-06-30 | Integrated gas detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021263789.7U CN212845013U (en) | 2020-06-30 | 2020-06-30 | Integrated gas detection device |
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| CN212845013U true CN212845013U (en) | 2021-03-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114280004A (en) * | 2021-12-14 | 2022-04-05 | 武汉信达易通科技有限公司 | Gas detection device for increasing optical path and inhibiting reflection interference |
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2020
- 2020-06-30 CN CN202021263789.7U patent/CN212845013U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114280004A (en) * | 2021-12-14 | 2022-04-05 | 武汉信达易通科技有限公司 | Gas detection device for increasing optical path and inhibiting reflection interference |
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