Light path switching structure of dust concentration measuring device

Abstract

The utility model relates to an optical path switching structure of a dust concentration measuring device, and the optical path switching structure comprises a switching mechanism which comprises a driving part and a baffle plate, and the driving part is used for driving the baffle plate to rotate so as to shield a measuring light beam or a calibration light beam; the adjustable reflecting mirror mechanism comprises a reflecting mirror and an adjusting assembly, the reflecting mirror is used for reflecting the calibration light beam, and the adjusting assembly is used for adjusting the angle of the reflecting mirror so that the calibration light beam can be parallel to the measurement light beam. The driving component drives the baffle to shield the calibration light beam, and only the measurement light beam passes through the measurement chamber and is scattered with the flue gas dust particles; the driving component drives the baffle to shield the measurement beam, the calibration beam compensates the change of the intensity of the light source, the signal of the measurement beam is corrected, and the accuracy of the measurement result is ensured. The angle of the reflector is adjusted through the adjusting assembly to ensure that the calibration beam is parallel to the measurement beam, and the problems that the light path deviates from the design path, the light source intensity change of the measurement beam cannot be effectively compensated, and the measurement precision of the device is affected are solved.

Description

Technical Field

[0001] This utility model relates to the field of dust concentration measurement technology, and in particular to an optical path switching structure for a dust concentration measurement device. Background Technology

[0002] The light scattering dust concentration measurement method is a specialized detection instrument widely used in environmental monitoring, industrial production, scientific research experiments, homes and public places, and medical and health fields. Its working principle is based on the principle of light scattering. When particulate matter in a gas passes through a laser beam, it scatters light. The intensity of this scattered light is detected by a photoelectric sensor, thereby calculating the dust concentration.

[0003] However, after prolonged use, the laser source of existing light-scattering dust concentration measuring devices may experience a decrease in luminous efficiency due to aging. Therefore, the laser emitted by the source is usually divided into a measurement beam and a calibration beam. The measurement beam is scattered by the dust particles in the flue gas, and the calibration beam compensates for the change in light source intensity to ensure the accuracy of the measurement results. However, the calibration beam needs to be blocked during the measurement process, and the measurement beam needs to be blocked during the calibration process. Therefore, for dual-optical-path dust concentration measuring devices, it is urgent to propose an optical path switching structure to solve the problem of switching between the measurement beam and the calibration beam. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide an optical path switching structure for a dust concentration measuring device, which solves the problem of switching between the measuring beam and the calibration beam in existing dual-optical-path dust concentration measuring devices.

[0005] To achieve the above and other related objectives, this utility model provides an optical path switching structure for a dust concentration measuring device, including a measuring chamber, a light source, and a beam splitter. The measuring chamber is connected to a flue, and the beam splitter is used to split the light beam emitted by the light source into a measuring beam and a calibration beam. The measuring beam is used to measure the dust concentration in the flue gas within the measuring chamber, and the calibration beam is used to calibrate the signal of the measuring beam. The optical path switching structure includes:

[0006] A switching mechanism is connected to the measurement chamber. The switching mechanism includes a driving component and a baffle. The driving component is used to drive the baffle to rotate so as to block the measurement beam or the calibration beam.

[0007] An adjustable reflector mechanism is connected to the measurement chamber. The adjustable reflector mechanism includes a reflector and an adjustment component. The reflector is used to reflect the calibration beam, and the adjustment component is used to adjust the angle of the reflector so that the calibration beam is parallel to the measurement beam.

[0008] Optionally, the switching mechanism further includes a mounting base, on which a connecting shaft is rotatably mounted, and the connecting shaft is connected to the driving component.

[0009] Optionally, the baffle is provided with a through-hole for inserting the connecting shaft.

[0010] Optionally, the baffle is provided with a first threaded locking hole.

[0011] Optionally, the connecting shaft is provided with an abutment surface, which is disposed opposite to the threaded locking hole.

[0012] Optionally, a gear transmission assembly is provided between the driving component and the baffle.

[0013] Optionally, the driving component is a motor.

[0014] Optionally, the adjustable reflector mechanism further includes a base connected to the measuring chamber, the reflector being rotatably connected to the base, the base having a mounting groove, the adjustment assembly including a rotating shaft and a slider, the rotating shaft being rotatably connected to the base and located within the mounting groove, the slider being slidably connected to the mounting groove, the slider being threadedly connected to the rotating shaft, the reflector having a sliding groove, and the slider being slidably connected to the sliding groove.

[0015] Optionally, the slider is provided with a sliding part, which is slidably connected to the groove.

[0016] Optionally, the base is provided with a second threaded locking hole, which is used to insert a locking member to fix the rotatable connection between the reflector and the base.

[0017] As described above, this invention has the following beneficial effects: the light beam emitted by the light source is split into a measurement beam and a calibration beam by a beam splitter. A drive component drives a baffle to block the calibration beam, causing the measurement beam to be scattered by the flue gas and dust particles as it passes through the measurement chamber. By driving the baffle to block the measurement beam, only the calibration beam is emitted. The calibration beam compensates for changes in light source intensity and ambient light interference, correcting the signal of the measurement beam and ensuring the accuracy of the measurement results. When the reflector deviates in angle due to changes in the external environment, the angle of the reflector can be adjusted by an adjustment component to ensure that the calibration beam is parallel to the measurement beam. This avoids the problem of the optical path deviating from the designed path, failing to effectively compensate for changes in the light source intensity of the measurement beam, and affecting the measurement accuracy of the device. Attached Figure Description

[0018] Figure 1 The diagram shown is a schematic diagram of the optical path switching structure of a dust concentration measuring device according to an embodiment of this application.

[0019] Figure 2 Displayed as Figure 1 Schematic diagram of the middle baffle;

[0020] Figure 3 Displayed as Figure 1 Schematic diagram of the middle connecting shaft;

[0021] Figure 4 The diagram shown is a structural schematic of the adjustable reflector mechanism illustrated in an embodiment of this application.

[0022] Figure 5 The diagram shown is a schematic representation of the reflector in an embodiment of this application.

[0023] Figure 6 The diagram shown is a schematic representation of the slider in an embodiment of this application.

[0024] Explanation of reference numerals in the attached figures

[0025] 1. Beam splitter prism, 2. Switching mechanism, 201. Drive component, 202. Baffle, 202a. Through channel, 202b. First threaded locking hole, 202b. Mounting base, 203. Connecting shaft, 204. Abutment surface, 204a. Adjustable reflector mechanism, 3. Reflector, 301. Slide, 301a. Adjustment component, 302. Rotating shaft, 302a. Slider, 302b. Sliding part, 302b1. Base, 303. Mounting groove, 303a. Second threaded locking hole, 303b. Gear transmission component, 4. Detailed Implementation

[0026] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0027] Please see Figures 1 to 6It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this utility model. Therefore, the drawings only show components relevant to this utility model and are not drawn according to the actual number, shape, and size of the components in implementation. In actual implementation, the form, quantity, and proportion of each component can be arbitrarily changed, and the component layout may be more complex. The structures, proportions, sizes, etc., shown in the accompanying drawings are only for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effects and objectives of this utility model, should still fall within the scope of the technical content disclosed in this utility model. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in this specification are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0028] Before describing the embodiments of this utility model in detail, the application environment of this utility model will be described first. The technology of this utility model is mainly applied to the field of dust concentration measurement technology. This utility model is used to solve the problem of switching between the measuring beam and the calibration beam in existing dual-optical-path dust concentration measuring devices.

[0029] Please combine Figures 1 to 6 As shown, this utility model provides an optical path switching structure for a dust concentration measuring device.

[0030] In an exemplary embodiment of this application, the optical path switching structure of the dust concentration measuring device includes a measuring chamber, a light source, and a beam splitter 1. The measuring chamber is connected to a flue, and the beam splitter 1 is used to split the light beam emitted by the light source into a measuring beam and a calibration beam. The measuring beam is used to measure the dust concentration in the flue gas inside the measuring chamber, and the calibration beam is used to calibrate the measuring beam signal. The optical path switching structure includes:

[0031] The switching mechanism 2 is connected to the measurement chamber. The switching mechanism 2 includes a driving component 201 and a baffle 202. The driving component 201 is used to drive the baffle 202 to rotate so as to block the measurement beam or calibration beam.

[0032] The adjustable reflector mechanism 3 is connected to the measurement chamber. The adjustable reflector mechanism 3 includes a reflector 301 and an adjustment component 302. The reflector 301 is used to reflect the calibration beam, and the adjustment component 302 is used to adjust the angle of the reflector 301 so that the calibration beam is parallel to the measurement beam.

[0033] In this embodiment, the light beam emitted by the light source is split into a measurement beam and a calibration beam by the beam splitter prism 1. The calibration beam is blocked by the baffle 202 driven by the driving component 201, causing the measurement beam to be scattered by the flue gas and dust particles after passing through the measurement chamber. The baffle 202 is also blocked by the driving component 201, allowing only the calibration beam to be emitted. The calibration beam compensates for changes in light source intensity and ambient light interference, correcting the signal of the measurement beam and ensuring the accuracy of the measurement results. When the reflector 301 deviates in angle due to changes in the external environment, the angle of the reflector 301 can be adjusted by the adjustment component 302 to ensure that the calibration beam is parallel to the measurement beam. This prevents the optical path from deviating from the designed path, which could lead to the inability to effectively compensate for changes in the light source intensity of the measurement beam and affect the measurement accuracy of the device.

[0034] In an exemplary embodiment of this application, the switching mechanism 2 further includes a mounting base 203, on which a connecting shaft 204 is rotatably disposed, and the connecting shaft 204 is connected to the driving component 201.

[0035] In this embodiment, the baffle 202 is connected to the drive component 201 via the connecting shaft 204.

[0036] In an exemplary embodiment of this application, the baffle 202 is provided with a through-channel 202a, which is used to insert the connecting shaft 204.

[0037] In this embodiment, the baffle 202 can be connected to the connecting shaft 204 by interference fit through the through channel 202a to achieve anti-rotation; or the connecting shaft 204 has a connecting key, and the through channel 202a of the baffle 202 is provided with a keyway, and the connecting shaft 204 and the baffle 202 are connected to achieve anti-rotation by the concave and convex fit of the connecting key and the keyway.

[0038] In an exemplary embodiment of this application, the baffle 202 is provided with a first threaded locking hole 202b.

[0039] In this embodiment, a screw is connected to the first threaded locking hole 202b provided on the baffle 202 by threading it internally, so that the screw abuts against the connecting shaft 204, thereby achieving an anti-rotation connection between the baffle 202 and the connecting shaft 204.

[0040] In an exemplary embodiment of this application, the connecting shaft 204 is provided with an abutment surface 204a, which is disposed opposite to the threaded locking hole.

[0041] In this embodiment, the contact area between the screw and the connecting shaft 204 is increased by the abutting surface 204a provided on the connecting shaft 204 abutting with the screw, thereby further realizing the anti-rotation function and reducing the risk of slippage at the abutting connection between the screw and the connecting shaft 204.

[0042] In an exemplary embodiment of this application, a gear transmission assembly 4 is provided between the drive component 201 and the baffle 202.

[0043] In this embodiment, the gear transmission can ensure a constant instantaneous transmission ratio, so that the rotational speed of the drive component 201 can be stably converted into the rotational speed of the baffle 202, ensuring the smoothness and accuracy of the rotation of the baffle 202.

[0044] In one exemplary embodiment of this application, the drive component 201 is a motor.

[0045] In this embodiment, the motor shown has a bidirectional rotation function, and through program control, the baffle 202 can be flipped within the range of -90° to 180°.

[0046] In an exemplary embodiment of this application, the adjustable reflector mechanism 3 further includes a base 303, which is connected to the measuring chamber. The reflector 301 is rotatably connected to the base 303. The base 303 is provided with a mounting groove 303a. The adjustment component 302 includes a rotating shaft 302a and a slider 302b. The rotating shaft 302a is rotatably connected to the base 303 and is located in the mounting groove 303a. The slider 302b is slidably connected to the mounting groove 303a and threadedly connected to the rotating shaft 302a. The reflector 301 is provided with a sliding groove 301a, and the slider 302b is slidably connected to the sliding groove 301a.

[0047] In this embodiment, the rotating shaft 302a is a lead screw, and the slider 302b is threadedly connected to the rotating shaft 302a. By rotating the rotating shaft 302a, the slider 302b can move along the axial direction of the rotating shaft 302a. Since the slider 302b is connected to the groove 301a of the reflector 301, and the reflector 301 is rotatably connected to the base 303, when the slider 302b moves along the axial direction of the rotating shaft 302a, it can drive the reflector 301 to rotate around the rotatable connection between the reflector 301 and the base 303, thereby adjusting the angle of the reflector 301 and thus adjusting the angle of the calibration beam.

[0048] In an exemplary embodiment of this application, the slider 302b is provided with a sliding part 302b1, and the sliding part 302b1 is slidably connected to the groove 301a.

[0049] In an exemplary embodiment of this application, the base 303 is provided with a second threaded locking hole 303b, which is used to pass through a locking member to fix the rotatable connection between the reflector 301 and the base 303.

[0050] In this embodiment, the reflector 301 is provided with a rotating shaft that is rotatably connected to the base 303. When the reflector 301 is adjusted to the position, it is threadedly connected to the second threaded locking hole 303b through a locking member, and the locking member abuts against the rotating shaft provided on the reflector 301, thereby fixing the rotatable connection between the reflector 301 and the base 303.

[0051] The working principle is as follows: the light beam emitted by the light source is split into a measurement beam and a calibration beam by the beam splitter prism 1. The calibration beam is blocked by the baffle 202 driven by the driving component 201, causing the measurement beam to be scattered by the flue gas and dust particles after passing through the measurement chamber. The baffle 202, driven by the driving component 201, blocks the measurement beam, allowing only the calibration beam to be emitted. The calibration beam compensates for changes in light source intensity and ambient light interference, correcting the signal of the measurement beam and ensuring the accuracy of the measurement results. When the reflector 301 deviates in angle due to changes in the external environment, the angle of the reflector 301 can be adjusted by the adjusting component 302 to ensure that the calibration beam is parallel to the measurement beam. This prevents the optical path from deviating from the designed path, which could lead to the inability to effectively compensate for changes in the light source intensity of the measurement beam and affect the measurement accuracy of the device.

[0052] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A light path switching structure of a dust concentration measuring device, comprising a measuring chamber, a light source and a light splitting prism, the measuring chamber being in communication with a flue, the light splitting prism being used for splitting a light beam emitted by the light source into a measuring light beam and a calibration light beam, the measuring light beam being used for measuring a flue gas dust concentration in the measuring chamber, the calibration light beam being used for calibrating a measuring light beam signal, characterized in that, The light path switching structure comprises: A switching mechanism connected with the measuring chamber, the switching mechanism comprising a driving component and a baffle, the driving component being used to drive the baffle to rotate so as to shield the measuring light beam or the calibration light beam; An adjustable mirror mechanism connected with the measuring chamber, the adjustable mirror mechanism comprising a mirror and an adjusting assembly, the mirror being used to reflect the calibration light beam, and the adjusting assembly being used to adjust the angle of the mirror so as to make the calibration light beam parallel to the measuring light beam.

2. The light path switching structure of a dust concentration measuring apparatus according to claim 1, characterized by: The switching mechanism further comprises a mounting seat, a connecting shaft being rotatably arranged on the mounting seat and connected with the driving component.

3. The light path switching structure of a dust concentration measuring apparatus according to claim 2, characterized by: The baffle is provided with a penetrating channel, the penetrating channel being used to penetrate the connecting shaft.

4. The light path switching structure of a dust concentration measuring apparatus according to claim 3, characterized by: The baffle is provided with a first threaded locking hole.

5. The light path switching structure of a dust concentration measuring apparatus according to claim 4, characterized by: The connecting shaft is provided with an abutting surface, the abutting surface being oppositely arranged with the threaded locking hole.

6. The light path switching structure of a dust concentration measuring apparatus according to claim 1, characterized by: A gear transmission assembly is arranged between the driving component and the baffle.

7. The light path switching structure of a dust concentration measuring apparatus according to claim 6, characterized by: The driving component is an electric motor.

8. The light path switching structure of a dust concentration measuring apparatus according to claim 1, characterized by: The adjustable mirror mechanism further comprises a base, the base being connected with the measuring chamber, the mirror being rotatably connected with the base, the base being provided with a mounting groove, the adjusting assembly comprising a rotating shaft and a sliding block, the rotating shaft being rotatably connected with the base and located in the mounting groove, the sliding block being slidably connected with the mounting groove, the sliding block being threadedly connected with the rotating shaft, the mirror being provided with a sliding groove, and the sliding block being slidably connected with the sliding groove.

9. The light path switching structure of a dust concentration measuring apparatus according to claim 8, characterized by: The sliding block is provided with a sliding portion, the sliding portion being slidably connected with the sliding groove.

10. The light path switching structure of a dust concentration measuring apparatus according to claim 9, wherein: The base is provided with a second threaded locking hole, the second threaded locking hole being used to penetrate a locking member so as to fix the rotatable connection between the mirror and the base.

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