Annular light scattering measuring device for particulate matters

Abstract

The utility model provides an annular light scattering measuring device for particulate matters. The annular light scattering measuring device comprises a collimation light source assembly, a conical lens, a measuring chamber and a light receiving assembly, the collimation light source assembly is used for emitting collimation light, and the conical lens, the measuring chamber and the light receiving assembly are sequentially arranged on the front side of the collimation light source assembly; the conical lens is used for converting the collimated light into a light beam with an annular cross section and a conical longitudinal section; the measuring chamber is used for introducing fluid which needs to be measured and contains particulate matters, and the annular light converted by the conical lens forms an annular measuring area in the measuring chamber; scattered light generated by the particulate matters in the annular measuring area is received by the light receiving assembly and is used for evaluating the concentration of the particulate matters. According to the annular light scattering measuring device for the particulate matter, the measuring process of the concentration of the particulate matter is optimized through innovative design, the detection precision and reliability are improved, meanwhile, the structure of an instrument is simplified, and the applicability of the instrument is enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to online pollution source emission monitoring technical field, concretely relates to a particulate matter annular light scattering measuring device. BACKGROUND

[0002] The measurement of the particle phase concentration in the particulate matter two-phase flow has been the demand of the processes such as the particulate matter preparation and processing in industrial processes, the particulate matter pollution source emission, and the inhalable particle detection in health and hygiene.

[0003] Disadvantages of the prior art:

[0004] 1. Limited measurement accuracy: The existing particulate matter detection equipment often uses point light sources or simple linear light sources. Such light sources are easily affected by uneven distribution of particulate matter during measurement, resulting in inaccurate measurement results.

[0005] 2. Susceptible to interference light: Due to the design of the light source, some light directly emitted from the light source may not be scattered by the particulate matter and directly enter the detector, causing signal interference and affecting the final measurement results.

[0006] 3. Complex structure: Some high-precision measurement devices have complex structures, which not only increase the manufacturing cost but also are not convenient to operate in practice.

[0007] Therefore, the prior art has deficiencies and needs to be further improved. UTILITY MODEL CONTENT

[0008] In view of the problems existing in the prior art, the utility model provides a particulate matter annular light scattering measuring device.

[0009] To achieve the above purpose, the specific scheme of the utility model is as follows:

[0010] The utility model provides a particulate matter annular light scattering measuring device, which comprises:

[0011] A collimated light source assembly, a cone lens, a measuring chamber, and a light receiving assembly;

[0012] The collimated light source assembly is used for emitting collimated light, and the cone lens, the measuring chamber, and the light receiving assembly are sequentially arranged on the front side of the collimated light source assembly;

[0013] The cone lens is used for converting the collimated light into a beam with a ring-shaped transverse section and a conical longitudinal section;

[0014] The measuring chamber is used for introducing the fluid containing particulate matter to be measured, and the annular light converted by the cone lens forms an annular measurement area in the measuring chamber;

[0015] The scattered light generated by the particulate matters in the annular measuring area is received by the light receiving assembly for evaluating the concentration of the particulate matters.

[0016] Further, the collimated light source assembly comprises a light source and a collimating lens.

[0017] The collimating lens is arranged at the front side of the light source.

[0018] Further, the collimated light source assembly comprises a light source or an optical fiber for conducting the light emitted by the light source to the conic lens or the light source directly irradiates on the conic lens.

[0019] Further, the light receiving assembly comprises a receiving lens and a light detector.

[0020] The scattered light generated by the particulate matters in the annular measuring area is received by the light receiving assembly for evaluating the concentration of the particulate matters.

[0021] Further, a blocking diaphragm is arranged between the conic lens and the measuring chamber.

[0022] The blocking diaphragm is used for eliminating the divergent light generated at the top of the conic angle of the conic lens.

[0023] The technical scheme of the utility model has the following beneficial effects:

[0024] 1. Improve the measuring precision: the collimated light is converted into a special light beam with annular cross section and conic longitudinal section by using the conic lens, and an annular measuring area is formed in the measuring chamber. This design can make the scattered light of the particulate matters more evenly distributed in the measuring area, thereby improving the precision of the particulate matter concentration measurement.

[0025] 2. Enhance the anti-interference ability: the device is provided with a blocking diaphragm to eliminate the divergent light generated at the top of the conic angle of the conic lens, which reduces the interference of direct light on the measurement result, improves the signal-to-noise ratio of the system, and makes the measurement result more reliable.

[0026] 3. Simplify the structure: the collimated light source assembly can be composed of a light source and a collimating lens or an optical fiber, which provides a flexible design scheme and can select the most suitable light source transmission mode according to the specific application environment, and simplifies the structure of the overall device.

[0027] 4. Easy to integrate and install: the connection between the components of the device is reasonable, which is convenient for integration into the existing particulate matter monitoring system, and also convenient for on-site installation and maintenance.

[0028] 5. Non-contact measurement is adopted, which can greatly improve the sensitivity and reliability of the instrument, and very simple realization of the calibration function of the instrument. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a structural schematic view of the utility model.

[0030] In the figure:

[0031] 1, light source;

[0032] 2, collimating lens;

[0033] 3, cone lens;

[0034] 4, measuring chamber;

[0035] 5, smoke dust particle;

[0036] 6, annular measuring area;

[0037] 7, receiving lens;

[0038] 8, light detector;

[0039] 9, light receiving assembly;

[0040] 10, blocking diaphragm;

[0041] 11, collimating light source assembly. DETAILED DESCRIPTION

[0042] The utility model will be further explained in detail below in combination with the drawings and examples.It can be understood that the specific examples described here are only used to explain the utility model and not limited to the utility model.In addition, it should be noted that in order to facilitate the description, only the part related to the utility model is shown in the drawings and not all structures.

[0043] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixed connection, can also be detachable connection, or be integrated, can be mechanical connection, can also be electrical connection, can be directly connected, can also be indirectly connected through intermediate medium, can be the communication of two elements or the interaction of two elements.For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0044] In the utility model, unless another definite provision and limitation, first feature is in second feature "on" or "under" can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but contact through other feature between them.Moreover, first feature is in second feature "on", "above" and "upper surface" include that first feature is in second feature directly above and obliquely above, or just indicate that first feature horizontal height is higher than second feature.First feature is in second feature "under", "below" and "under surface" include that first feature is in second feature directly below and obliquely below, or just indicate that first feature horizontal height is less than second feature.

[0045] In the description of the embodiment, the terms "upper", "lower", "front", "back", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model.In addition, the terms "first", "second" are only used to distinguish in description, and have no special meaning.

[0046] Combining Figure 1 As shown in the utility model provides a kind of particulate matter annular light scattering measurement device, comprising:

[0047] Collimating light source component 11, cone lens 3, measuring chamber 4, light receiving component 9;

[0048] The collimating light source component 11 is used to emit collimated light, and the cone lens 3, the measuring chamber 4 and the light receiving component 9 are sequentially arranged on the front side of the collimating light source component 11.

[0049] The cone lens 3 is used to convert the collimated light into a beam with a cross section in the form of a ring and a longitudinal section in the form of a cone.

[0050] The measuring chamber 4 is used to introduce a fluid containing particulate matter to be measured, and the annular light converted by the cone lens 3 forms an annular measuring area 6 in the measuring chamber 4.

[0051] The scattered light generated by the particulate matter in the annular measuring area 6 is received by the light receiving component 9, which is used to evaluate the concentration of the particulate matter.

[0052] The collimating light source component 11 comprises a light source 1 and a collimating lens 2.

[0053] The collimating lens 2 is arranged on the front side of the light source 1.

[0054] The collimating light source component 11 can also be composed of a light source 1 or an optical fiber, which is used to transmit the light emitted by the light source 1 to the cone lens, or the light source 1 directly irradiates on the cone lens 3.

[0055] The light receiving assembly 9 includes a receiving lens 7 and a light detector 8.

[0056] The scattered light generated by the particulate matter in the annular measurement area 6 is converged by the receiving lens 7 onto the light detector 8 for calculating the concentration of the particulate matter.

[0057] A blocking diaphragm 10 is further provided between the conical lens 3 and the measurement chamber 4.

[0058] The blocking diaphragm 10 is used to eliminate the divergent light generated at the top of the conical angle of the conical lens 3.

[0059] The principle of the utility model is as follows:

[0060] 1. Light source preparation:

[0061] The collimated light source assembly 11 is used for emitting collimated light, and the light source 1 can be any suitable light emitter, such as a laser, etc.

[0062] A collimating lens 2 is provided in front of the light source 1, or an optical fiber is used to guide the light emitted by the light source 1 to the subsequent assembly, to ensure the directionality and consistency of the light beam.

[0063] 2. Light beam shaping:

[0064] After the collimated light passes through the conical lens 3, it is converted into a special light beam shape, i.e. a ring shape in the transverse section and a conical shape in the longitudinal section.

[0065] This annular light beam can form an annular measurement area 6 in the measurement chamber 4, so that the particulate matter in the fluid can be illuminated and generate scattered light in this area.

[0066] 3. Particulate matter detection:

[0067] The measurement chamber 4 is a measurement space for accommodating the fluid containing particulate matter to be measured, such as smoke particles 5.

[0068] When the fluid containing particulate matter enters the measurement chamber 4 and passes through the annular measurement area 6, the particulate matter will scatter the photons in the annular light beam, generating scattered light.

[0069] 4. Scattered light collection and analysis:

[0070] The scattered light is captured by the light receiving assembly, which includes a receiving lens 7 and a light detector 8.

[0071] The receiving lens 7 is used to converge the scattered light onto the light detector 8, and the light detector 8 is used to record the information of the scattered light.

[0072] According to the received intensity and pattern of the scattered light, the concentration of the particulate matter is calculated through a pre-set algorithm.

[0073] 5. Eliminate interference light:

[0074] A light blocking diaphragm 10 is arranged between the cone lens 3 and the measuring chamber 4, which is used to block the divergent light generated at the top of the cone angle of the cone lens 3, so as to avoid these non-scattered lights from entering the light receiving assembly 9, thereby reducing the interference and improving the measurement accuracy.

[0075] Through the above steps, the device realizes effective measurement of the particle concentration, utilizes the characteristics of the annular light beam and the accurate collection and analysis of the scattered light, and improves the measurement accuracy and reliability.

[0076] The above only describes the preferred embodiments of the present application, and does not limit the patent range of the present application, and any equivalent structural transformation made by using the content of the present application specification and drawings, or directly / indirectly applied in other related technical fields under the utility model concept of the present application are included in the protection range of the present application.

Claims

1. A particulate matter annular light scattering measurement device, characterized by, Comprise: A collimated light source assembly, a conic lens, a measuring chamber, a light receiving assembly; The collimated light source assembly is used to emit collimated light, and the conic lens, the measuring chamber and the light receiving assembly are sequentially arranged on the front side of the collimated light source assembly; The conic lens is used to convert the collimated light into a light beam with a ring-shaped transverse section and a conic longitudinal section; The measuring chamber is used to pass the fluid containing particles to be measured, and the ring-shaped light converted by the conic lens forms a ring-shaped measuring area in the measuring chamber; The scattered light generated by the particles in the ring-shaped measuring area is received by the light receiving assembly, which is used to evaluate the concentration of the particles.

2. The particle ring-shaped light scattering measurement device according to claim 1, wherein: The collimated light source assembly comprises a light source and a collimating lens; The collimating lens is arranged on the front side of the light source.

3. The particle ring-shaped light scattering measurement device according to claim 1, wherein: The collimated light source assembly comprises a light source or an optical fiber, the optical fiber is used to conduct the light emitted by the light source to the conic lens, or the light source directly irradiates on the conic lens.

4. The particle ring-shaped light scattering measurement device according to claim 1, wherein: The light receiving assembly comprises a receiving lens and a light detector; The scattered light generated by the particles in the ring-shaped measuring area is converged by the receiving lens to the light detector, which is used to calculate the concentration of the particles.

5. The particle ring-shaped light scattering measurement device according to claim 1, wherein: A blocking diaphragm is further arranged between the conic lens and the measuring chamber; The blocking diaphragm is used to eliminate the divergent light generated at the top of the conic angle of the conic lens.

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