CN215812278U - Particulate matter measuring device with automatic calibration module - Google Patents
Particulate matter measuring device with automatic calibration module Download PDFInfo
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- CN215812278U CN215812278U CN202122076191.8U CN202122076191U CN215812278U CN 215812278 U CN215812278 U CN 215812278U CN 202122076191 U CN202122076191 U CN 202122076191U CN 215812278 U CN215812278 U CN 215812278U
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Abstract
The utility model relates to a particulate matter measuring device, in particular to a particulate matter measuring device with an automatic calibration module. The photoelectric detector comprises a laser transmitter, a light splitting sheet, an air chamber, a lens and a photoelectric receiver, wherein direct light emitted by the laser transmitter penetrates through the light splitting sheet, enters the air chamber, is reflected by particles in the air chamber, and enters the photoelectric receiver through the lens. The automatic calibration device further comprises an automatic calibration module, wherein the automatic calibration module comprises a reflector, a reflector driving mechanism and a first light trap, and the reflector is arranged on a reflection light path of the light splitting sheet and can enable the reflection light of the light splitting sheet to directly pass through the air chamber to enter the photoelectric receiver. The output end of the reflector driving mechanism is connected with the reflector, and the first optical trap is used for measuring the absorption of reflected light passing through the reflector in a measuring state. The particle measuring device is simple in structure, the calibration of the particle measuring device is realized by controlling the reflector driving mechanism and further controlling the angle of the reflector, the operation is simple and convenient, the use is flexible, and the measuring accuracy is improved.
Description
Technical Field
The utility model relates to a particulate matter measuring device, in particular to a particulate matter measuring device with an automatic calibration module.
Background
The urban air pollution in China mostly belongs to a coal-smoke type, and particulate matters are main pollutants in the atmosphere. The atmospheric pollution caused by particulate matters has increasingly serious influence on human health, and has attracted extensive attention. At present, the measurement of particulate matter is mostly carried out by adopting a particulate matter measuring device. To ensure the accuracy of the particulate matter measuring device, the device needs to be calibrated accurately during use. The existing calibration is usually carried out manually, when the particulate matter measuring device is set to be higher, the manual measurement safety is low and the manual measurement efficiency is lower, the whole structure of the device needs to be improved, so that the automatic calibration can be realized.
Disclosure of Invention
In order to overcome the defects in the prior art, the utility model provides a particulate matter measuring device with an automatic calibration module.
The technical scheme of the utility model is as follows:
the utility model provides a particulate matter measuring device with automatic calibration module, includes laser emitter, beam splitter, air chamber, lens and photoelectric receiver, the direct light that laser emitter sent passes through beam splitter and gets into the air chamber and reflect to lens entering photoelectric receiver through the particulate matter in the air chamber. The automatic calibration device further comprises an automatic calibration module, wherein the automatic calibration module comprises a reflector, a reflector driving mechanism and a first light trap, and the reflector is arranged on a reflection light path of the light splitting sheet and can enable the reflection light of the light splitting sheet to directly pass through the air chamber to enter the photoelectric receiver. The output end of the reflector driving mechanism is connected with the reflector, and the first optical trap is used for measuring the absorption of reflected light passing through the reflector in a measuring state.
Further, the measuring and calibrating device further comprises a measuring and calibrating chamber, wherein the measuring and calibrating chamber is arranged between the laser emitter and the gas chamber, and the light splitting sheet, the reflecting mirror and the first light trap are arranged in the measuring and calibrating chamber.
Furthermore, a light inlet hole, a transmission light hole and a reflection light hole are arranged in the measurement calibration chamber, the light inlet hole is communicated with the emitting end of the laser emitter, the transmission light hole is communicated with the air chamber and is arranged on a transmission light path of the light splitting sheet, and the reflection light of the reflector is received by the photoelectric receiver through the reflection light hole.
Furthermore, the beam splitter is arranged on a direct light path of the laser emitter at an angle of 45 degrees.
Furthermore, the reflector is arranged on the reflector seat, and the output end of the reflector driving mechanism is connected with the reflector seat.
Furthermore, the reflector driving mechanism comprises a screw rod and a motor, the screw rod is connected with the reflector seat, and the output end of the motor is connected with the screw rod.
Further, the lens is arranged on a reflection light path which is reflected by the reflecting mirror and passes through the air chamber.
Further, the photoelectric receiver is disposed outside the gas chamber and receives the reflected light passing through the lens.
Further, a second light trap is arranged at the tail of the gas chamber and arranged on a transmission light path of the light splitting sheet.
Furthermore, a reflecting cavity with a conical section is arranged on the first optical trap.
The utility model achieves the following beneficial effects:
the particulate matter measuring device with the automatic calibration module is simple in structure. The calibration of the particulate matter measuring device is realized by controlling the reflector driving mechanism and further controlling the angle of the reflector, the operation is simple and convenient, and the use is flexible.
According to the particle measuring device with the automatic calibration module, the first light trap is arranged in a measuring state, so that the problems that reflected light brought by the reflecting plate is not completely absorbed, stray light is generated, and the accuracy of a measuring result is influenced are solved. The accuracy of the measurement state is greatly improved.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention in a calibration state.
Fig. 2 is a schematic view of the overall structure in the measurement state of the present invention.
In the figure, 1, a laser transmitter; 2. a light splitting sheet; 3. a measurement calibration chamber; 4. a light transmitting aperture; 5. an air chamber; 6. a lens; 7. a photoelectric receiver; 8. a second optical trap; 9. a reflective light aperture; 10. a first optical trap; 11. a mirror; 12. a light inlet hole; 13. (ii) particulate matter.
Detailed Description
To facilitate an understanding of the present invention by those skilled in the art, specific embodiments thereof are described below with reference to the accompanying drawings.
As shown in FIGS. 1-2, a particle measurement device with an automatic calibration module comprises a laser emitter 1, a beam splitter 2, a reflector 11, a reflector driving mechanism, a first optical trap 10, a measurement calibration chamber 3, an air chamber 5, a lens 6 and a photoelectric receiver 7. The laser emitter 1 emits laser, the light splitting piece 2 splits the laser into transmitted light and reflected light, the transmitted light is used for measuring the concentration of the particulate matters 13, and the reflected light is used for calibration. The light splitting sheet 2 is arranged on a direct light path of the laser emitter 1 in an angle of 45 degrees. The reflecting mirror 11 is arranged on the reflected light path of the light splitter 2 and can directly pass the reflected light of the light splitter 2 through the gas chamber 5 to enter the photoelectric receiver 7.
In a measuring state, direct light emitted by the laser transmitter 1 penetrates through the light splitter 2, enters the gas chamber 5, is reflected to the lens 6 through the particles 13 in the gas chamber 5, and then enters the photoelectric receiver 7 for measuring the concentration of the particles.
The measurement calibration chamber 3 is arranged between the laser emitter 1 and the gas chamber 5, and the spectroscope 2, the reflector 11 and the first optical trap 10 are arranged in the measurement calibration chamber 3. The first optical trap 10 is provided with a reflective cavity having a tapered cross section, and is used for measuring absorption of reflected light passing through the mirror 11 in a measurement state.
The measurement calibration chamber 3 is internally provided with a light inlet 12, a transmission light hole 4 and a reflection light hole 9, the light inlet 12 is communicated with the transmitting end of the laser transmitter 1, the transmission light hole 4 is communicated with the air chamber 5 and is arranged on the transmission light path of the light splitting sheet 2, and the reflected light of the reflector 11 is received by the photoelectric receiver 7 through the reflection light hole 9. Specifically, the reflector driving mechanism comprises a screw rod and a motor, the screw rod is connected with the reflector seat, and the output end of the motor is connected with the screw rod. The motor further drives the reflector seat to rotate through driving the screw rod to rotate, and the angle of the reflector is adjusted.
The lens 6 is disposed on a reflection light path reflected by the mirror 11 and passing through the gas cell 5. The photo-receiver 7 is disposed outside the gas chamber 5 and receives the reflected light passing through the lens 6. And a second light trap 8 is arranged at the tail part of the gas chamber 5, and the second light trap 8 is arranged on the transmission light path of the light splitting sheet 2.
In a specific using process, the motor is controlled to rotate the reflector base in a measuring state, so that reflected light of the light splitting sheet 2 enters the first light trap 10, the reflected light is fully absorbed, stray light is not generated, and the accuracy of a measuring result is improved. The transmitted light is scattered through the particulate matter 13 into the photodetector.
And in the calibration state, the extraction of the particles is stopped, and the reflecting mirror base is rotated by controlling the motor, so that the reflected light enters the photoelectric receiver 7 through the reflecting mirror 11, and the automatic calibration of the measuring module is realized. The whole device has a simple structure, uses few elements and can completely realize the automatic calibration of the particulate matter measuring device in the using process.
The above-described embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. A particulate matter measuring device with an automatic calibration module comprises a laser transmitter (1), a light splitting sheet (2), an air chamber (5), a lens (6) and a photoelectric receiver (7), wherein direct light rays emitted by the laser transmitter (1) penetrate through the light splitting sheet (2) to enter the air chamber (5), and are reflected to the lens (6) through particulate matters (13) in the air chamber (5) to enter the photoelectric receiver (7); the method is characterized in that: the automatic calibration device further comprises an automatic calibration module, wherein the automatic calibration module comprises a reflector (11), a reflector driving mechanism and a first light trap (10), the reflector (11) is arranged on a reflection light path of the light splitting sheet (2) and can enable the reflection light of the light splitting sheet (2) to directly pass through the air chamber (5) and enter the photoelectric receiver (7); the output end of the reflector driving mechanism is connected with a reflector (11), and the first optical trap (10) is used for measuring the absorption of reflected light passing through the reflector (11) in a measuring state.
2. The particulate matter measurement device with the automatic calibration module of claim 1, wherein: the device is characterized by further comprising a measurement calibration chamber (3), wherein the measurement calibration chamber (3) is arranged between the laser emitter (1) and the gas chamber (5), and the light splitting sheet (2), the reflecting mirror (11) and the first light trap (10) are arranged in the measurement calibration chamber (3).
3. The particulate matter measurement device with the automatic calibration module of claim 2, wherein: the measurement calibration chamber (3) is internally provided with a light inlet hole (12), a transmission light hole (4) and a reflection light hole (9), the light inlet hole (12) is communicated with the transmitting end of the laser transmitter (1), the transmission light hole (4) is communicated with the air chamber (5) and is arranged on the transmission light path of the light splitting sheet (2), and the reflection light of the reflector (11) is received by the photoelectric receiver (7) through the reflection light hole (9).
4. The particulate matter measurement device with the automatic calibration module of claim 1, wherein: the light splitting sheet (2) is arranged on a direct light path of the laser emitter (1) at an angle of 45 degrees.
5. The particulate matter measurement device with the automatic calibration module of claim 1, wherein: the reflector (11) is arranged on the reflector seat, and the output end of the reflector driving mechanism is connected with the reflector seat.
6. The particulate matter measuring device with the automatic calibration module according to claim 1 or 5, wherein: the reflector driving mechanism comprises a screw rod and a motor, the screw rod is connected with the reflector seat, and the output end of the motor is connected with the screw rod.
7. The particulate matter measurement device with the automatic calibration module of claim 1, wherein: the lens (6) is arranged on a reflection light path which is reflected by the reflector (11) and passes through the air chamber (5).
8. The particulate matter measurement device with the automatic calibration module of claim 1, wherein: the photoelectric receiver (7) is arranged outside the gas chamber (5) and receives the reflected light passing through the lens (6).
9. The particulate matter measurement device with the automatic calibration module of claim 1, wherein: and a second light trap (8) is arranged at the tail part of the gas chamber (5), and the second light trap (8) is arranged on a transmission light path of the light splitting sheet (2).
10. The particulate matter measurement device with the automatic calibration module of claim 1, wherein: the first optical trap (10) is provided with a reflecting cavity with a conical section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122076191.8U CN215812278U (en) | 2021-08-31 | 2021-08-31 | Particulate matter measuring device with automatic calibration module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122076191.8U CN215812278U (en) | 2021-08-31 | 2021-08-31 | Particulate matter measuring device with automatic calibration module |
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| Publication Number | Publication Date |
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| CN215812278U true CN215812278U (en) | 2022-02-11 |
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| CN202122076191.8U Active CN215812278U (en) | 2021-08-31 | 2021-08-31 | Particulate matter measuring device with automatic calibration module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024055377A1 (en) * | 2022-09-15 | 2024-03-21 | 厦门美时美克空气净化有限公司 | Single-laser dual-channel dust sensor |
-
2021
- 2021-08-31 CN CN202122076191.8U patent/CN215812278U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024055377A1 (en) * | 2022-09-15 | 2024-03-21 | 厦门美时美克空气净化有限公司 | Single-laser dual-channel dust sensor |
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