Granularity expansion analysis device

Abstract

The utility model relates to the technical field of particle size expansion analysis, and provides a particle size expansion analysis device which comprises a light source device for providing a light source, a filtering part for filtering light beams emitted by the light source device, and a sample accommodating part for accommodating a sample, the sample accommodating part is provided with a transparent window for a light source to penetrate through, the sample accommodating part is connected with a dispersing device for dispersing a sample, and the Fourier lens is used for performing Fourier transform on the light source penetrating through the sample accommodating part; the particle size expansion analysis device further comprises a light intensity detection part used for detecting the light intensity of the light beams passing through the Fourier lens. The particle size expansion analysis device provided by the utility model can realize particle size measurement and particle thermal expansion rate measurement and analysis, and is relatively high in accuracy and low in equipment cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of particle size expansion analysis, in particular to a particle size expansion analysis device. Background Art

[0002] Thermal expansion is the phenomenon in which a material's volume or length increases with increasing temperature. Current methods for analyzing particle size expansion often use optical dilatometers, mechanical dilatometers, or electrical dilatometers (capacitive or inductive), which can be inaccurate or expensive. Utility Model Content

[0003] The purpose of the present invention is to overcome at least one of the above-mentioned deficiencies of the prior art and to provide a particle size expansion analysis device that can measure and analyze particle size and thermal expansion coefficient of particles with relatively high accuracy and low equipment cost.

[0004] The technical solution of the present utility model is: a particle size expansion analysis device, comprising a light source device for providing a light source, a filtering component for filtering the light beam emitted by the light source device, and a sample holding component for holding a sample, the sample holding component having a transparent window for allowing the light source to pass through, and the sample holding component is connected to a dispersing device for dispersing the sample, the particle size expansion analysis device also includes a Fourier lens for performing Fourier transform on the light source passing through the sample holding component, the particle size expansion analysis device also includes a light intensity detection component for detecting the light intensity of the light beam passing through the Fourier lens, the light source device, the filtering component, the sample holding component, the Fourier lens and the light intensity detection component are arranged in sequence along the light output direction of the light source device.

[0005] Specifically, the particle size expansion analysis device includes a linear guide rail, and at least one of the light source device, the filter component, the sample holding component and the Fourier lens is slidably connected to the linear guide rail.

[0006] Specifically, the light source device is a green laser light source device.

[0007] Specifically, the filtering component includes a beam expander lens, a collimating lens, a transforming lens and an adjustable slit device, and the beam expander lens, the collimating lens, the transforming lens and the adjustable slit device are sequentially arranged along the light emitting direction of the light source device.

[0008] Specifically, at least one of the beam expander lens, the collimator lens, the transform lens and the adjustable slit device is connected to a spatial filtering adjustment structure whose position can be adjusted along the light emitting direction of the light source device.

[0009] Specifically, a collimating lens component is provided between the filtering component and the sample holding component.

[0010] Specifically, the sample holding component is connected to an ultrasonic heating device.

[0011] Specifically, the ultrasonic heating device is connected to the upper and lower sides of the sample holding component through a first hose and a second hose respectively, and the first hose or the second hose is connected to a pump body.

[0012] Specifically, the light intensity detection component is connected to the arc guide rail through a sliding trolley, the center of the circle corresponding to the arc guide rail is in the extension direction of the linear guide rail, the sample holding component is connected to a temperature detector for obtaining the sample temperature in the sample holding component, and the light intensity detection component is connected to an angle detector for obtaining the real-time angle of the light intensity detector. The temperature detector and the angle detector are connected to the processing module.

[0013] Specifically, two opposite surfaces of the sample holding component are flat transparent quartz parts.

[0014] The utility model provides a particle size expansion analysis device, which can realize particle size measurement and particle thermal expansion rate measurement and analysis with relatively high accuracy and low equipment cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 It is a schematic diagram of the principle of a particle size expansion analysis device provided by an embodiment of the present utility model. DETAILED DESCRIPTION

[0017] In order to make the purpose, 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 only used to explain the present invention and are not intended to limit the present invention.

[0018] It should be noted that the terms "setting" and "connecting" should be understood in a broad sense. For example, it can be directly setting or connecting, or it can be indirectly setting or connecting through a central component or a central structure.

[0019] In addition, if there are terms such as "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating orientation or positional relationships in the embodiments of the present invention, these are based on the orientation or positional relationships shown in the drawings or the conventional placement state or usage state, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the structure, feature, device or element referred to must have a specific orientation or positional relationship, nor must it be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0020] The various specific technical features and embodiments described in the specific implementation methods can be combined in any suitable manner unless there is any contradiction. For example, different implementation methods can be formed by combining different specific technical features / embodiments. In order to avoid unnecessary repetition, the various possible combinations of the specific technical features / embodiments in the present invention will not be described separately.

[0021] like Figure 1 As shown, an embodiment of the present invention provides a particle size expansion analysis device, comprising a light source device 1 for providing a light source, a filter component 2 for filtering the light beam emitted by the light source device 1, and a sample holding component 4 for holding a sample, wherein the sample holding component 4 has a transparent window for allowing the light source to pass through, and the sample holding component 4 is connected to a dispersion device 50 for dispersing the sample, the particle size expansion analysis device further comprises a Fourier lens 5 for performing Fourier transform on the light source passing through the sample holding component 4, and the particle size expansion analysis device further comprises a light intensity detection component 6 for detecting the light intensity of the light beam passing through the Fourier lens 5, the light source device 1, the filter component 2, the sample holding component 4, the Fourier lens 5 and the light intensity detection component 6 are arranged in sequence along the light output direction of the light source device 1, which can realize the measurement of particle size and the measurement and analysis of the thermal expansion coefficient of particles with relatively high accuracy and low equipment cost.

[0022] Specifically, the particle size expansion analysis device includes a linear guide rail, and at least one of the light source device 1, the filter component 2, the sample holding component 4 and the Fourier lens 5 is slidably connected to the linear guide rail for adjustment. In specific applications, the light source device 1, the filter component 2, the sample holding component 4 and the Fourier lens 5 can be respectively slidably connected to the same linear guide rail through a bracket, and a locking device can be provided between the bracket and the linear guide rail. The locking device can be a bolt, etc., which is used to fix each component to the linear guide rail.

[0023] Specifically, the light source device 1 is a green laser light source device 1 , which has a good diffraction effect, and the light intensity detection component 6 is easy to detect green light, and the measurement and analysis effect is good.

[0024] Specifically, the filtering component 2 includes a beam expander lens 21, a collimating lens 22, a transform lens 23 and an adjustable slit device 24. The beam expander lens 21, the collimating lens 22, the transform lens 23 and the adjustable slit device 24 are arranged in sequence along the light emitting direction of the light source device 1. Specifically, at least one of the beam expander lens 21, the collimating lens 22, the transform lens 23 and the adjustable slit device 24 is connected to a spatial filtering adjustment structure that can adjust the position along the light emitting direction of the light source device 1. The relative position of the filtering component 2 (adjustable slit device 24) is adjustable along the straight line direction to facilitate debugging.

[0025] Specifically, a collimating lens component 3 is provided between the filtering component 2 and the sample holding component 4 to collimate the light beam.

[0026] Specifically, the sample holding component 4 is connected to an ultrasonic heating device, and the dispersing device 50 is an ultrasonic heating device. The ultrasonic heating device can be used to evenly disperse the sample and evenly heat it to avoid measurement errors caused by uneven heating.

[0027] Specifically, the two opposing surfaces of the sample holder 4 are made of flat transparent quartz (serving as the aforementioned transparent windows), which offer high light transmittance and minimize light loss, thereby ensuring measurement accuracy. The ultrasonic heating device is connected to the upper and lower sides of the sample holder 4 via a first hose 51 and a second hose 52, respectively, to ensure sample dispersion. The first hose 51 or the second hose 52 is connected to a pump 60, which can be a peristaltic pump.

[0028] Specifically, the light intensity detection component is connected to the curved guide rail via a sliding trolley. The center of the circle corresponding to the curved guide rail is in the extension direction of the linear guide rail. The sample holding component 4 is connected to a temperature detector for obtaining the temperature of the sample in the sample holding component 4. The light intensity detection component 6 is connected to an angle detector for obtaining the real-time angle of the light intensity detector. The temperature detector and the angle detector are connected to the processing module. The processing module is also connected to the light intensity detector (a light intensity detector for detecting the intensity of light at different angles). The processing module can continuously record the temperature of the temperature detector and the real-time angle of the light intensity detector.

[0029] In specific applications, the steps for using the particle size expansion analyzer can be referred to as follows:

[0030] 1. Sample preparation:

[0031] ① Weigh a certain amount of 150 nm PMMA and disperse it in a beaker filled with 50 ml of deionized water, and then place it in an ultrasonic cleaner (ultrasonic heating device, i.e., dispersion device 50);

[0032] ② Turn on the power of the ultrasonic cleaner and start ultrasonicating the sample;

[0033] ③ Turn on the power of the peristaltic pump, and the sample begins to circulate through the first hose 51 and the second hose 52. It is observed that the sample is filled with the sample holding part 4 (sample pool) without bubbles.

[0034] 2. Debugging:

[0035] ① Turn on the power of light source device 1 (laser light);

[0036] ② Adjust the optical path until obvious diffraction rings appear at the light intensity detector.

[0037] 3. Measurement:

[0038] ① Turn on the light intensity detector switch;

[0039] ② Turn on the angle detector (angle detector) switch;

[0040] ③ Connect the temperature detector (temperature detector), fix the temperature detector to the sample beaker or sample holding component 4, and record the temperature;

[0041] ④ Slowly move the light intensity detector along the guide rail, record the changes in light intensity, and read the corresponding angle value at the same time. The angular distribution data of the scattered light intensity can be used to derive the particle size distribution of the sample under test by applying scattering theory.

[0042] Because independent three-dimensional entities in a dispersed system are typically considered to be particles, for a given incident light source, small particles have large diffraction angles and low light intensity, while large particles have small diffraction angles and high light intensity. Mie scattering theory, based on Maxwell's electromagnetic equations, can predict the intensity distribution of scattered light from spherical particles. The larger the particle, the smaller the scattering angle, and the smaller the particle, the larger the scattering angle. The intensity of scattered light is directly proportional to the sixth power of the particle size and inversely proportional to the fourth power of the incident light wavelength. It is also related to the refractive index and absorptivity of the particle, as well as the refractive index of the dispersion medium.

[0043] The particle size expansion analysis device provided by the embodiment of the present invention can realize the measurement and analysis of particle diameter and thermal expansion rate of particles with relatively high accuracy and low equipment cost.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements or improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A particle size expansion analysis device, characterized in that: The particle size expansion analysis device includes a light source device for providing a light source, a filtering component for filtering the light beam emitted by the light source device, and a sample holding component for holding a sample. The sample holding component has a transparent window for allowing the light source to pass through, and the sample holding component is connected to a dispersing device for dispersing the sample. The particle size expansion analysis device also includes a Fourier lens for performing Fourier transform on the light source passing through the sample holding component. The particle size expansion analysis device also includes a light intensity detection component for detecting the light intensity of the light beam passing through the Fourier lens. The light source device, filtering component, sample holding component, Fourier lens and light intensity detection component are arranged in sequence along the light output direction of the light source device.

2. A particle size expansion analysis device according to claim 1, characterized in that: The particle size expansion analysis device includes a linear guide rail, and at least one of the light source device, the filter component, the sample holding component and the Fourier lens is slidably connected to the linear guide rail.

3. A particle size expansion analysis device according to claim 1, characterized in that: The light source device is a green laser light source device.

4. A particle size expansion analysis device according to claim 1, characterized in that: The filtering component comprises a beam expander lens, a collimating lens, a transforming lens and an adjustable slit device, which are sequentially arranged along the light emitting direction of the light source device.

5. A particle size expansion analysis device as claimed in claim 4, characterized in that: At least one of the beam expander lens, the collimator lens, the transform lens and the adjustable slit device is connected to a spatial filtering adjustment structure capable of adjusting a position along a light emitting direction of the light source device.

6. A particle size expansion analysis device according to claim 1, characterized in that: A collimating lens component is provided between the filtering component and the sample holding component.

7. A particle size expansion analysis device according to claim 1, characterized in that: The sample holding component is connected to an ultrasonic heating device.

8. A particle size expansion analysis device according to claim 7, characterized in that: The ultrasonic heating device is connected to the upper and lower sides of the sample holding component through a first hose and a second hose respectively, and the first hose or the second hose is connected to a pump body.

9. A particle size expansion analysis device according to claim 2, characterized in that: The light intensity detection component is connected to the arc guide rail through a sliding trolley. The center of the circle corresponding to the arc guide rail is in the extension direction of the linear guide rail. The sample holding component is connected to a temperature detector for obtaining the temperature of the sample in the sample holding component. The light intensity detection component is connected to an angle detector for obtaining the real-time angle of the light intensity detector. The temperature detector and the angle detector are connected to the processing module.

10. The particle size expansion analysis device according to claim 1, characterized in that: The two opposite sides of the sample holding component are flat transparent quartz parts.

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