Embedded multi-path particle analyzer

Abstract

The utility model discloses an embedded multi-path particle analyzer, which relates to the field of particle analysis and comprises a shell, a shell cover is fixedly mounted at the top of the shell through bolts, a touch screen is mounted at the upper position of the front part of the shell in an embedded manner, a groove is formed in the lower position of the front part of the shell, and the touch screen is arranged in the groove. A printer is fixedly installed in the center of the interior of the groove, a liquid inlet bin and a liquid outlet bin are arranged on the two sides of the printer in the groove respectively, and a liquid suction hose and a liquid outlet hose penetrate through the tops of the inner sides of the liquid inlet bin and the liquid outlet bin respectively. According to the embedded multi-path particle analyzer disclosed by the utility model, particles are detected by adopting a light resistance method, the particles with different sizes are classified and analyzed, and the particle analyzer with 16 measuring ranges is designed, so that the measuring range of the analyzer is improved, and the embedded multi-path particle analyzer has more application scenes.

Description

Technical Field

[0001] This utility model relates to the field of particle analysis, and in particular to an embedded multichannel particle analyzer. Background Technology

[0002] Currently, common methods for measuring microparticles include optical obscuration and light scattering. Optical obscuration determines the size and number of microparticles based on the principle that microparticles reduce the intensity of transmitted light by blocking parallel light. Generally, the larger the microparticle size, the higher the detection accuracy. The detection limit that optical obscuration can achieve is usually greater than 2 μm.

[0003] The light scattering method is based on the scattering of light by particles. When the size of the particle is similar to that of the light wavelength, the scattering is greater, and when the particle size is larger, the scattering is smaller. In particle detection, a 0.65 μm wavelength laser is generally used. The maximum particle size that can be detected by the light scattering method is generally less than 4 μm.

[0004] To expand the analyzer's range and broaden its applications, a particle analyzer with 16 ranges was designed, employing optical obscuration to detect particles and classify and analyze particles of different sizes. Utility Model Content

[0005] The main objective of this invention is to provide an embedded multi-channel particle analyzer that can effectively solve the technical problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] An embedded multichannel particle analyzer includes a housing, a cover fixedly mounted on the top of the housing by bolts, a touch screen embedded in the upper front part of the housing, a groove formed in the lower front part of the housing, a printer fixedly mounted in the center of the groove, an inlet chamber and a drain chamber on both sides of the printer inside the groove, and a suction tube and a drain tube respectively passing through the top of the inner side of the inlet chamber and the drain chamber.

[0008] As a further embodiment of this utility model, a peristaltic pump is installed inside the housing, and the inlet end of the peristaltic pump is connected to the suction hose.

[0009] As a further embodiment of this utility model, the interior of the housing is provided with a particle analysis component, which includes a light source, a collimating lens, a transparent glass, a condensing lens, and a detector. The light source, collimating lens, transparent glass, condensing lens, and detector are arranged in a line in sequence, and two transparent glasses are symmetrically arranged with a slit between the two transparent glasses.

[0010] As a further embodiment of this utility model, the two ends of the slit are respectively the inlet flow range and the outlet flow range, the inlet flow range is connected to the outlet end of the peristaltic pump, and the outlet flow range is connected to the outlet hose.

[0011] As a further embodiment of this utility model, a handle is fixedly installed on the top of the shell cover.

[0012] The beneficial effects of this utility model are as follows:

[0013] A particle analyzer with 16 ranges was designed to detect particles using the optical obscuration method, classify and analyze particles of different sizes, and improve the analyzer's range to enable it to be used in more scenarios. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of an embedded multi-channel particle analyzer according to the present invention;

[0015] Figure 2 This is a schematic diagram of the particle analysis component structure of an embedded multi-channel particle analyzer according to the present invention;

[0016] Figure 3 This is a frame diagram of an embedded multichannel particle analyzer according to the present invention;

[0017] Figure 4 This utility model relates to a multi-channel reference voltage comparison circuit for an embedded multi-channel particle analyzer.

[0018] Figure 5 This is a circuit diagram of the amplifier for an embedded multi-channel particle analyzer according to the present invention;

[0019] Figure 6 This is a schematic diagram of the power conversion circuit for an embedded multi-channel particle analyzer according to the present invention.

[0020] In the diagram: 1. Housing; 2. Housing cover; 3. Handle; 4. Touch screen; 5. Printer; 6. Liquid inlet chamber; 7. Liquid outlet chamber; 8. Suction hose; 9. Drain hose; 10. Light source; 11. Collimating lens; 12. Transparent glass; 13. Slit; 14. Condensing lens; 15. Detector; 16. Liquid inlet range. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1

[0023] Combination Figures 1-5 An embedded multichannel particle analyzer includes a housing 1, a cover 2 fixedly mounted on the top of the housing 1 by bolts, a touch screen 4 embedded in the upper front part of the housing 1, a groove formed in the lower front part of the housing 1, a printer 5 fixedly mounted in the center of the groove, an inlet chamber 6 and an outlet chamber 7 on both sides of the printer 5 inside the groove, and a suction hose 8 and an outlet hose 9 passing through the top of the inner side of the inlet chamber 6 and the outlet chamber 7, respectively.

[0024] A peristaltic pump is installed inside the housing 1, and the inlet end of the peristaltic pump is connected to the suction hose 8.

[0025] The interior of the housing 1 is equipped with a particle analysis component, which includes a light source 10, a collimating lens 11, a transparent glass 12, a condenser lens 14, and a detector 15. The light source 10, collimating lens 11, transparent glass 12, condenser lens 14, and detector 15 are arranged in a line in sequence, and two transparent glasses 12 are symmetrically arranged, with a slit 13 formed between the two transparent glasses 12.

[0026] The two ends of the slit 13 are the inlet flow range 16 and the outlet flow range, respectively. The inlet flow range 16 is connected to the outlet end of the peristaltic pump, and the outlet flow range is connected to the outlet hose 9.

[0027] A handle 3 is fixedly installed on the top of the cover 2.

[0028] Example 2

[0029] like Figure 6 As shown, the analyzer is powered by an 18V power supply, which is converted to 12V by an LM317 power conversion module, and then to 5V by a 7805 voltage conversion module. These voltages are used for weak signal detection, amplification, and comparison circuits, as well as for powering the peristaltic pump driver chip and the printer.

[0030] It should be noted that this utility model is an embedded multi-channel particle analyzer. In use, the sample liquid is placed in the inlet chamber 6 through a container, the suction tube 8 is inserted into the sample container, the peristaltic pump draws the liquid sample, and the liquid sample enters the sample cell through the pipeline. The sample enters the slit 13 through the inlet volume range 16. At the same time, the light source 10 is working and emits light through the condenser lens 14. Particles in the liquid block part of the light source after passing through the optical sensitive area. At this time, the remaining light source passes through the slit 13 and is incident on the detector 15 at the rear. The detector 15 is a photoelectric receiving module. The rear amplifier amplifies, filters and other signal processing of the signal from the photoelectric receiving module. The signal is compared with the multi-channel comparator, and the comparison result is sent to the multi-channel counting range. The microcontroller records the number of particles in different ranges and uploads the information of different particle sizes to the host computer. The host computer displays the relevant data and can print it.

[0031] The detection of particle size and quantity is achieved through subsequent circuitry. As particles pass through the slit, the energy of uniform light decreases. The larger the particle size, the more light is blocked, and the less energy reaches the detector. The detector converts the light energy into electrical energy, which is amplified and filtered by a weak signal circuit. The signal is then compared with 16 set reference voltages. When the voltage is greater than a certain reference voltage, it is considered that the particle size is the same as the reference voltage.

[0032] The comparison voltage is set using an analog circuit. The output voltage is divided by Pi and Ri to form the reference voltage Refi. Figure 4 The reference voltage Refi is compared with the amplified signal CMPIN of the transmitted light within the OPA4132. When the Refi voltage is greater than CMPIN, the comparison output voltage ComperOuti is low, and the particle count of the corresponding range increases. When the Refi voltage is less than CMPIN, the comparison output voltage ComperOuti is high, and the particle count of the corresponding range remains unchanged. Figure 4 As shown, each OPA432 implements 4 voltage comparisons, and 4 OPA4132s implement 16 ranges of reference voltage comparisons;

[0033] like Figure 5 As shown, the photodetector converts parallel light into an electrical signal. This signal is then converted into a voltage signal by the I / V circuit composed of U10. The chip uses OPA129 (package: SOT-8U) as the conversion chip, with a bias current reaching the 1pA level. To shield the weak signal circuit from the influence of external electromagnetic signals, motor starting, etc., an aluminum alloy isolation cover PB is used to cover the chip to isolate external electromagnetic interference. In addition, a large capacitor + small capacitor approach is used (the large capacitor stabilizes the voltage of the chip's power supply, and the small capacitor filters the high frequency to eliminate high frequency jitter) to improve the chip's power supply regulation (ripple reduction) effect and improve the detection limit of weak signals.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An embedded multipath particle analyzer comprising a housing (1), characterized in that: The top of the shell (1) is fixedly installed with a shell cover (2) through a bolt, the front upper position of the shell (1) is embeddedly installed with a touch screen (4), the front lower position of the shell (1) is provided with a groove, the inner center position of the groove is fixedly installed with a printer (5), the inside of the groove is located on both sides of the printer (5) and is respectively an inlet liquid bin (6) and a discharge liquid bin (7), the inner top position of the inlet liquid bin (6) and the discharge liquid bin (7) is respectively penetrated with a liquid suction hose (8) and a liquid discharge hose (9); The inside of the shell (1) is provided with a particle analysis assembly, the particle analysis assembly comprises a light source (10), a collimating lens (11), transparent glasses (12), a condenser lens (14) and a detector (15), the light source (10), the collimating lens (11), the transparent glasses (12), the condenser lens (14) and the detector (15) are sequentially installed in a line, and the transparent glasses (12) are symmetrically provided as two, a slit (13) is formed between the two transparent glasses (12); The both ends of the slit (13) are respectively an inlet liquid range (16) and a discharge liquid range, the inlet liquid range (16) is communicated with the discharge end of the peristaltic pump, and the discharge liquid range is communicated with the liquid discharge hose (9).

2. An embedded multipath particle analyzer according to claim 1, wherein: The inside of the shell (1) is installed with a peristaltic pump, the inlet end of the peristaltic pump is communicated with the liquid suction hose (8).

3. The embedded multiplexed particle analyzer of claim 1, wherein: The top of the shell cover (2) is fixedly installed with a handle (3).

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