CN220568661U - Device for detecting smoke transmittance by double wavelengths - Google Patents
Device for detecting smoke transmittance by double wavelengths Download PDFInfo
- Publication number
- CN220568661U CN220568661U CN202322173928.7U CN202322173928U CN220568661U CN 220568661 U CN220568661 U CN 220568661U CN 202322173928 U CN202322173928 U CN 202322173928U CN 220568661 U CN220568661 U CN 220568661U
- Authority
- CN
- China
- Prior art keywords
- laser
- receiving system
- smoke
- power detector
- beam expander
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000779 smoke Substances 0.000 title claims abstract description 51
- 238000002834 transmittance Methods 0.000 title claims abstract description 33
- 230000003287 optical effect Effects 0.000 claims description 18
- 238000001514 detection method Methods 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 5
- 230000009977 dual effect Effects 0.000 claims 1
- 238000011156 evaluation Methods 0.000 abstract description 4
- 238000012360 testing method Methods 0.000 description 11
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model provides a device for detecting smoke transmittance by double wavelengths, which comprises a transmitting device, a receiving device and an upper computer, wherein the transmitting device is connected with the receiving device; the transmitting device and the receiving device are respectively arranged at two ends of the smoke area to be detected; the transmitting device comprises a first wavelength laser, a first beam expander, a second wavelength laser and a second beam expander; the receiving device comprises a first laser receiving system and a second laser receiving system. The laser beam collimated by the first beam expander passes through a smoke area to be detected and is received by a first laser receiving system; the laser beam of the second wavelength emitted by the second wavelength laser enters the second beam expander, and the laser beam collimated by the second beam expander passes through the smoke area to be detected and is received by the second laser receiving system. The first laser receiving system and the second laser receiving system are electrically connected with the upper computer. The transmittance of different wave bands can be synchronously obtained, which is the basis of the technical index evaluation of the smoke product.
Description
Technical Field
The utility model relates to the technical field of lasers, in particular to a device for detecting smoke transmittance by two wavelengths.
Background
The wide use of ranging, guidance, blinding and other weapons based on laser technology in modern wars forces us to develop coping strategies in time, and smoke interference is one of the more common means. Therefore, research into smoke components has also become an urgent task in recent years. The characteristic of attenuation of laser after passing through smoke is one of main basis for researching smoke components, and has important significance for laser guidance and infrared countermeasure.
At present, the field dynamic smoke transmittance is tested separately in different wave bands, two wave bands are two sets of systems, real-time synchronous testing is difficult, and the carrying is inconvenient. The utility model provides a thought for simultaneously detecting transmittance of two wavelengths, which can synchronously obtain the transmittance of different wavebands and is the basis for evaluating technical indexes of smoke products. Because the double laser detection is integrated, the whole device is more convenient to carry while the reliability is ensured, so that the whole device is not only suitable for detecting a smoke box in a laboratory, but also is more suitable for remote field unknown smoke transmittance test.
Disclosure of Invention
In order to solve the technical problems in the background technology, the utility model provides a device for detecting the smoke transmittance by double wavelengths, and the double laser detection is integrated in one device, so that the transmittance of different wavebands can be synchronously obtained, and a feasible basis is provided for the establishment and evaluation of the technical indexes of smoke products.
In order to achieve the above purpose, the utility model is realized by adopting the following technical scheme:
the device for detecting the smoke transmittance by double wavelengths comprises a transmitting device, a receiving device and an upper computer; the transmitting device and the receiving device are respectively arranged at two ends of the smoke area to be detected; the transmitting device comprises a first wavelength laser, a first beam expander, a second wavelength laser and a second beam expander; the receiving device comprises a first laser receiving system and a second laser receiving system.
The light path structure is: the laser beam collimated by the first beam expander passes through a smoke area to be detected and is received by a first laser receiving system; and the laser beam collimated by the second beam expander passes through the smoke area to be detected and is received by a second laser receiving system.
The circuit structure is as follows: the first laser receiving system and the second laser receiving system are electrically connected with the upper computer.
Further, the first wavelength laser is a 1.06 μm laser.
Further, the second wavelength laser is a 10.6 μm laser, the transmitting device further comprises a spectroscope and a third power detector, the spectroscope is arranged between the second wavelength laser and the second beam expander, a part of light is split by the spectroscope and enters the second beam expander, another part of light enters the third power detector, and the third power detector is electrically connected with the upper computer.
Further, the third power detector is connected with the upper computer in a wireless communication mode.
Further, the first laser receiving system comprises a first receiving objective lens, a first optical filter and a first power detector which are sequentially connected through optical paths, and the first power detector is electrically connected with the upper computer.
Further, the second laser receiving system comprises a second receiving objective lens, a second optical filter and a second power detector which are sequentially connected with each other through optical paths, and the second power detector is electrically connected with the upper computer.
Compared with the prior art, the utility model has the beneficial effects that:
1) The utility model provides a device for simultaneously detecting transmittance of two wavelengths, which integrates double laser detection into one device, can synchronously obtain the transmittance of different wavebands, is the basis of technical index evaluation of smoke products, ensures reliability and simultaneously ensures that the whole device is more convenient to carry, so that the whole device is not only suitable for smoke box detection in a laboratory, but also is more suitable for remote field unknown smoke transmittance test;
2) The utility model selects the most commonly used two wavelength detection smoke transmittance of 1.06 mu m and 10.6 mu m in actual use, fully meets the user requirement, and simultaneously, because the power stability of the 10.6 mu m laser is poor, the power detector is required to be used for carrying out real-time calibration on the measured value in the device, the spectroscope is designed to be used for dividing a part of light to the power detector, so that the real-time calibration on the measured value of 10.6 mu m can be carried out;
3) Because the power stability of the 10.6 mu m laser is poor and the fluctuation is large, the laser is in communication connection with an upper computer in a wireless transmission mode, and the power of the 10.6 mu m laser is calibrated.
Drawings
FIG. 1 is a diagram of the optical path and circuit configuration of a device for detecting smoke transmittance at two wavelengths according to the present utility model (solid line is optical path, broken line is circuit);
FIG. 2 is a first laser receiving system diagram (solid lines are optical paths, dashed lines are electrical circuits) of the present utility model;
fig. 3 is a diagram of a second laser receiving system according to the present utility model (solid line is an optical path, and broken line is an electrical circuit).
Detailed Description
The following is a further description of embodiments of the utility model, taken in conjunction with the accompanying drawings:
as shown in FIG. 1, the device for detecting the smoke transmittance by two wavelengths comprises a transmitting device, a receiving device and an upper computer; the transmitting device and the receiving device are respectively arranged at two ends of the smoke area to be detected; the transmitting device comprises a first wavelength laser, a first beam expander, a second wavelength laser and a second beam expander; the receiving device comprises a first laser receiving system and a second laser receiving system.
The light path structure is: the laser beam collimated by the first beam expander passes through a smoke area to be detected and is received by a first laser receiving system; and the laser beam collimated by the second beam expander passes through the smoke area to be detected and is received by a second laser receiving system.
The circuit structure is as follows: the first laser receiving system and the second laser receiving system are electrically connected with the upper computer.
In this embodiment, the first wavelength laser is a 1.06 μm laser. The 1.06 mu m laser is connected with a first power supply to form a first wavelength laser module.
In this embodiment, the second wavelength laser is a 10.6 μm laser, and the 10.6 μm laser is connected to a second power supply to form a second wavelength laser module.
The utility model selects the most commonly used two wavelength detection smoke transmittance of 1.06 mu m and 10.6 mu m in actual use, fully meets the user requirement, and simultaneously, because the power stability of the 10.6 mu m laser is poor, the measured value needs to be calibrated in real time by using a power detector in a transmitting device, the design uses a spectroscope to divide a part of light to the power detector, and the real-time calibration of the measured value of 10.6 mu m can be carried out. The concrete structure is as follows: the beam expander is characterized in that a beam splitter is further arranged between the second wavelength laser and the second beam expander, and the beam expander further comprises a third power detector, a part of light split by the beam splitter enters the second beam expander, the other part of light enters the third power detector, and the third power detector is electrically connected with an upper computer.
In this embodiment, the third power detector is connected to the host computer in a wireless communication manner. Because the power stability of the 10.6 mu m laser is poor and the fluctuation is large, the laser is in communication connection with an upper computer in a wireless transmission mode, and the power of the 10.6 mu m laser is calibrated.
In this embodiment, the first beam expander adopts an inverted galilean telescopic system, and is composed of a positive lens group and a negative lens group, and is mainly used for collimating the first wavelength laser so as to reduce the emission angle thereof.
In this embodiment, the second beam expander adopts an inverted galilean telescopic system, and is composed of a positive lens group and a negative lens group, and is mainly used for collimating the second wavelength laser to reduce the emission angle thereof.
In this embodiment, as shown in fig. 2, the first laser receiving system includes a first receiving objective lens, a first optical filter and a first power detector, which are sequentially connected by an optical path, and the first power detector is electrically connected with an upper computer. The first filter is used for isolating interference light, transmitting signal light in specific wave band, and fully highlighting useful information to reduce interference information.
In this embodiment, as shown in fig. 3, the second laser receiving system includes a second receiving objective lens, a second optical filter and a second power detector, which are sequentially connected by an optical path, and the second power detector is electrically connected with the upper computer. The second filter is used for isolating interference light, transmitting signal light in specific wave band, and fully highlighting useful information to reduce interference information.
The working principle and specific measurement steps of the utility model are as follows:
1. after the instruments are arranged according to the requirements and preheated, a second wavelength laser is started, laser is emitted for a period of time, and the reading of a third power detector is recorded as a calibration value when the laser emits the maximum emergent power. Turning off the second laser to prepare for formal measurement;
2. starting a first wavelength laser, and emitting 1.06 mu m laser light by a 1.06 mu m laser;
3. the laser beam collimated by the first beam expander passes through the smoke area to be detected, and the first receiving objective lens transmits the transmitted light through the first optical filter and converges on the effective area of the first power detector. The first power detector can directly obtain the current power value, and an output port of analog quantity is reserved at the same time;
4. simultaneously starting a second wavelength laser, emitting 10.6 mu m laser by a 10.6 mu m laser, and dividing incident light into two beams equally through a spectroscope;
5. the split measuring laser passes through a second beam expander to collimate the laser so as to reduce the emission angle thereof. The collimated laser beam passes through the smoke area to be detected, and the second receiving objective lens transmits the transmitted light through the second optical filter and converges on the effective area of the second power detector. The second power detector can directly obtain the current power value, and an output port of analog quantity is reserved. The other beam of calibration laser is received by a third power detector, the power value of the current laser emission is directly obtained, and the power value is transmitted to a subsequent upper computer for receiving through a wireless transmission module;
6. the first laser receiving system collects the first wavelength laser power received for a period of time in real time;
7. and (2) the second laser receiving system acquires the received laser power of the second wavelength for a period of time in real time, reads the reading of the third power detector in real time, and divides the reading by the calibration value in the step (1) to obtain the power test value change percentage of the third power detector. The power test value of the second power detector divided by the percentage is the corrected measured power. Correcting the power stability of the power test value of the second power detector point by point according to the percentage of the change of the power test value of the third power detector;
8. the first laser receiving system and the second laser receiving system continuously collect and apply a smoke curtain; the upper computer synchronously receives the data acquired by the first laser receiving system and the second laser receiving system;
9. stopping collecting and storing test data after the smoke screen is released;
10. calculating the arithmetic average value of the power values acquired in the step 6 to be used as the initial value of the power at the wavelength of 1.06 mu m; in the step 7, calculating an arithmetic average value of the power test value of the second power detector after the power stability correction before the smoke screen is applied, and taking the arithmetic average value as a power initial value under the wavelength of 10.6 mu m;
11. dividing the power data acquired by the first laser receiving system after the smoke curtain is released by the calculated value in the step 10, and calculating the transmittance of each sampling point at the wavelength of 1.06 mu m; after the smoke is applied, the power data acquired by the second laser receiving system is subjected to power stability correction and then divided by the power initial value under the wavelength of 10.6 mu m in the step 10, and the transmittance of each sampling point under the wavelength of 10.6 mu m is calculated;
12. the test software of the upper computer has the functions of calculating average transmittance, minimum transmittance, generating and storing transmittance-time curves, selecting data processing time periods, storing and importing data and the like;
13. by adjusting the output power of the laser, transmittance tests at different distances can be realized.
In summary, the utility model provides a device for simultaneously detecting the transmittance of two wavelengths, which integrates the two laser detection into one device, can synchronously obtain the transmittance of different wavebands, is the basis of the technical index evaluation of smoke products, ensures the reliability, and simultaneously ensures that the whole device is more convenient to carry, so that the whole device is not only suitable for detecting smoke boxes in laboratories, but also is more suitable for remote field unknown smoke transmittance tests.
The above examples are implemented on the premise of the technical scheme of the present utility model, and detailed implementation manners and specific operation processes are given, but the protection scope of the present utility model is not limited to the above examples. All other embodiments, which can be made by those skilled in the art without the inventive effort, are intended to be within the scope of the present utility model.
Claims (6)
1. The device for detecting the smoke transmittance by double wavelengths is characterized by comprising a transmitting device, a receiving device and an upper computer; the transmitting device and the receiving device are respectively arranged at two ends of the smoke area to be detected; the transmitting device comprises a first wavelength laser, a first beam expander, a second wavelength laser and a second beam expander; the receiving device comprises a first laser receiving system and a second laser receiving system;
the light path structure is: the laser beam collimated by the first beam expander passes through a smoke area to be detected and is received by a first laser receiving system; the laser beam collimated by the second beam expander passes through the smoke area to be detected and is received by a second laser receiving system;
the circuit structure is as follows: the first laser receiving system and the second laser receiving system are electrically connected with the upper computer.
2. The apparatus for dual wavelength smoke transmittance detection according to claim 1, wherein said first wavelength laser is a 1.06 μm laser.
3. The device for detecting smoke transmittance according to claim 1, wherein the second wavelength laser is a 10.6 μm laser, the emitting device further comprises a beam splitter and a third power detector, the beam splitter is disposed between the second wavelength laser and the second beam expander, the beam splitter splits a part of light into the second beam expander, another part of light into the third power detector, and the third power detector is electrically connected with the upper computer.
4. A device for detecting smoke transmittance by two wavelengths according to claim 3, wherein the third power detector is connected with the host computer in a wireless communication manner.
5. The device for detecting smoke transmittance according to claim 1, wherein the first laser receiving system comprises a first receiving objective lens, a first optical filter and a first power detector which are sequentially connected with each other through optical paths, and the first power detector is electrically connected with the upper computer.
6. The device for detecting smoke transmittance according to claim 1, wherein the second laser receiving system comprises a second receiving objective lens, a second optical filter and a second power detector which are sequentially connected with each other through optical paths, and the second power detector is electrically connected with the upper computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322173928.7U CN220568661U (en) | 2023-08-14 | 2023-08-14 | Device for detecting smoke transmittance by double wavelengths |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322173928.7U CN220568661U (en) | 2023-08-14 | 2023-08-14 | Device for detecting smoke transmittance by double wavelengths |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220568661U true CN220568661U (en) | 2024-03-08 |
Family
ID=90104560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322173928.7U Active CN220568661U (en) | 2023-08-14 | 2023-08-14 | Device for detecting smoke transmittance by double wavelengths |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220568661U (en) |
-
2023
- 2023-08-14 CN CN202322173928.7U patent/CN220568661U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107462900B (en) | Gas component detection laser radar based on wavelength tunable laser source | |
| CN1988418B (en) | Method for automatic scaling light module | |
| CN103411686A (en) | Device and method for calibrating optical fiber scanning light source wavelength based on gas absorption spectral lines | |
| CN1196917C (en) | Optical system for simultaneous detecting calibration system and test signal in optical spectrum analyser | |
| CN202522516U (en) | Optical transmissivity test device | |
| CN203414177U (en) | Optical fiber scanning light source wavelength calibration device based on gas absorption lines | |
| CN104180901A (en) | Transmittance spectrum measurement device and method for ultra-narrow band filter | |
| CN105785386A (en) | High-precision frequency-modulation continuous wave laser ranging system based on F-P etalon | |
| CN103528991B (en) | System and method for measuring organic matter content of soil | |
| CN106017533A (en) | Rapid tuning real-time calibration fiber grating demodulation device and work method | |
| CN106769737B (en) | Optical fiber type dust concentration measuring device | |
| CN102243102B (en) | Photoelectric measuring device capable of measuring power and wavelength at same time | |
| CN203894137U (en) | Detection system for aerosol employing extinction method | |
| CN220568661U (en) | Device for detecting smoke transmittance by double wavelengths | |
| CN111272285B (en) | Polarization state measurement analyzer with high-speed real-time response | |
| US20200174128A1 (en) | Laser distance measuring device and method of use thereof | |
| CN210071661U (en) | Laser gas analyzer | |
| CN102445325A (en) | Device and method for measuring shade number of automatic darkening welding filter | |
| CN117030639A (en) | Device and method for detecting smoke transmittance by double wavelengths | |
| CN107515389B (en) | High-precision calibration system for satellite-borne laser radar detector | |
| CN106370202A (en) | Online testing method and device for comprehensive performance of detector for gyroscope | |
| CN102590151A (en) | Wireless transmission mode-based laser measuring method of smoke transmission rate | |
| CN105424320A (en) | Device for high-precision testing of output power stability of wide-spectrum light source | |
| CN201772994U (en) | Vertical incidence film reflectivity meter with the characteristics of symmetry and self calibration | |
| US6847439B2 (en) | Apparatus and method for synchronizing high-speed optical measurements made over a range of wavelengths |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |