Spectrometer probe device for calibrating light source wavelength of formaldehyde detector
By designing a spectrometer probe device including sleeve, reflector and rubber washer, the problem that existing spectrometers cannot measure the wavelength of the light source of the formaldehyde detector is solved, and effective wavelength measurement and calibration in a narrow space is achieved.
Patent Information
- Application Number
- CN202421026403.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-11
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-05-11
AI Technical Summary
The existing spectrometers cannot meet the determination of the wavelength of the light source in the formaldehyde detector, mainly because the probe size is too large and cannot enter the colorimetric pool and cannot be flipped to detect the sidewall light source.
A spectrometer probe device including a sleeve, a reflector and a rubber washer was designed. By installing a 45° inclined reflector on the inner wall of the bottom end of the sleeve, the light of the light source is refracted into a vertical direction, making it convenient for vertically installed spectrometer probes to be measured.
The effective measurement of the light source wavelength in a narrow space is achieved, and the calibration requirements of wavelength indication error and wavelength repeatability are met.
Smart Images
Figure CN222618487U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of spectrometer probes, in particular to a spectrometer probe device for calibrating the wavelength of a light source of a formaldehyde detector. Background Art
[0002] At present, some portable formaldehyde detectors based on the principle of spectrophotometry have appeared in the analytical instrument market, such as indoor air on-site formaldehyde tester, eight-in-one air quality detector, etc. This type of instrument is mainly composed of light-emitting diodes, colorimetric cells, detectors, data processing units and result display units. The detection principle of this type of instrument is to react the sample (formaldehyde gas) collected by the absorption liquid with the color developer to generate colored compounds, which selectively absorb 412nm, 550nm or 630nm wavelengths (different color developers have different absorption wavelengths). Therefore, the side walls of the colorimetric cell are equipped with monochromatic LED light sources (monochromatic LED light sources can be 412nm, 550nm or 630nm).
[0003] However, the spectrometers currently on the market cannot meet the requirements for measuring the wavelength of the light source in the detection cell of this type of formaldehyde detector. The difficulties are: ① The spectrometer probes on the market are large in size, with a diameter of at least 3 cm, and cannot enter the colorimetric cell (the diameter of the colorimetric cell is about 1.05 cm to 2.20 cm); ② The wavelength detection probe can only detect vertical light sources. Due to the small space of the detection cell and the fact that the light source of the detection cell is on the side wall of the detection cell, the light source probe cannot be flipped.
[0004] Therefore, in view of the above phenomenon, a spectrometer probe device for calibrating the wavelength of the light source of a formaldehyde detector is proposed to meet the needs of actual use. Utility Model Content
[0005] The utility model provides a spectrometer probe device for calibrating the wavelength of a light source of a formaldehyde detector, which solves the technical problems in the background technology.
[0006] In order to solve the above technical problems, the utility model provides a spectrometer probe device for calibrating the wavelength of the light source of a formaldehyde detector, comprising a sleeve with an outer diameter no greater than the diameter of a colorimetric cell, a light inlet slot being provided on the side of the bottom end of the sleeve, a reflector being fixedly mounted on the inner wall of the bottom end of the sleeve, a mounting seat being fixedly mounted on the top of the sleeve, a rubber gasket being movably sleeved in the middle of the mounting seat, and the bottom end of the spectrometer probe being inserted in the middle of the rubber gasket.
[0007] Preferably, the height of the light inlet slot is not less than the height of the reflector, and the width of the light inlet slot is not less than the width of the reflector.
[0008] Preferably, the angle between the reflector and the horizontal line is 45°.
[0009] Preferably, an external thread is integrally formed on the surface of the mounting seat, a height adjustment seat is threadedly mounted on the surface of the mounting seat, and a balance plate is integrally formed on the bottom surface of the height adjustment seat.
[0010] Compared with the related art, the spectrometer probe device for calibrating the wavelength of the light source of the formaldehyde detector provided by the utility model has the following beneficial effects:
[0011] The utility model provides a spectrometer probe device for calibrating the wavelength of the light source of a formaldehyde detector. A reflector installed at an angle of 45° is arranged on the inner wall of the bottom end of the sleeve. The reflector is used to refract the light emitted by the light source into vertical light, so that it is obtained by the vertically installed spectrometer probe, which facilitates the measurement of the wavelength of the light emitted by the light source, thereby achieving the purpose of spectrometer detection in a small space. The calibration requirements of wavelength indication error and wavelength repeatability can be met. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0013] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the utility model;
[0014] Figure 3 It is a side structural schematic diagram of the utility model;
[0015] Figure 4 This is a schematic diagram of the structure when the utility model is installed in a colorimetric cell;
[0016] Figure 5 This is a structural schematic diagram of the utility model when it is installed on the formaldehyde detector body.
[0017] Numbers in the figure: 100, spectrometer probe; 101, optical fiber bundle; 200, formaldehyde detector body; 201, colorimetric cell; 202, light source; 1, sleeve; 2, light inlet slot; 3, reflector; 4, mounting seat; 5, height adjustment seat; 51, balance board; 6, rubber gasket. DETAILED DESCRIPTION
[0018] Example, by Figure 1-4 The utility model includes a sleeve 1 whose outer diameter is not greater than the diameter of a colorimetric cell 201, a light inlet slot 2 is provided on the side of the bottom end of the sleeve 1, a reflector 3 is fixedly installed on the inner wall of the bottom end of the sleeve 1, a mounting seat 4 is fixedly installed on the top of the sleeve 1, a rubber gasket 6 is movably sleeved in the middle of the mounting seat 4, and the bottom end of the spectrometer probe 100 is inserted in the middle of the rubber gasket 6. A colorimetric cell 201 is provided on the body of the 200 formaldehyde detector, and a light source 202 is provided at the bottom of the inner wall of the colorimetric cell 201. The tail of the spectrometer probe 100 is connected to the spectrometer through an optical fiber bundle 101.
[0019] In this embodiment, the inner wall of the sleeve 1 is a smooth surface to prevent the device from tilting and causing light to be reflected on the inner wall of the sleeve 1, thereby affecting the calibration; the bottom end of the reflector 3 is higher than the bottom surface of the sleeve 1 to prevent the reflector 3 from directly contacting the bottom of the colorimetric cell 201 and causing damage or angle deviation; the inner diameter of the mounting seat 4 is not less than the outer diameter of the spectrometer probe 100, and by customizing rubber washers 6 of different sizes, the device can be adapted to the installation of various types of spectrometer probes 100 and ensure that the spectrometer probe 100 remains in the axial position.
[0020] The height of the light inlet slot 2 is not less than the height of the reflector 3 , and the width of the light inlet slot 2 is not less than the width of the reflector 3 .
[0021] In this embodiment, the opening of the light inlet slot 2 cannot affect the light source 202 from shining on the mirror surface of the reflector 3 , wherein the side view and the top view of the reflector 3 are both in the shape of a perfect circle.
[0022] The angle between the reflector 3 and the horizontal line is 45°.
[0023] In this embodiment, when the reflector 3 is placed at 45°, the horizontal light source can be refracted into a vertical light source, thereby illuminating the vertically mounted spectrometer probe 100 .
[0024] An external thread is integrally formed on the surface of the mounting seat 4 , a height adjustment seat 5 is threadedly mounted on the surface of the mounting seat 4 , and a balance plate 51 is integrally formed on the bottom surface of the height adjustment seat 5 .
[0025] In this embodiment, the installation height of the entire device can be adjusted by setting a height adjustment seat 5, and the light source 202 can be irradiated to the reflector 3 by adjusting the height; in addition, the added balance board 51 can effectively maintain the stability of the device to avoid tilting.
[0026] Working principle: The phenol reagent method for detecting formaldehyde in general indoor environments mainly uses a wavelength of 630nm, the AHMT spectrophotometry method uses a wavelength of 550nm, and the acetylacetone method is generally selected for textiles and decorative materials, using 410-415nm as the characteristic wavelength. Therefore, the accuracy of the wavelength directly affects the detection result of formaldehyde, but the spectrometers currently on the market cannot meet the measurement of the wavelength of the light source in the detection pool of this type of formaldehyde detector. In order to calibrate the indication error and repeatability of the wavelength of the light source, a reflector 3 installed at an angle of 45° is provided on the inner wall of the bottom end of the sleeve 1. The reflector 3 is used to refract the light emitted by the light source 202 into vertical light, so that it is obtained by the vertically installed spectrometer probe 100, which facilitates the measurement of the wavelength of the light emitted by the light source 202, thereby achieving the purpose of the spectrometer to detect in a small space. The calibration requirements of the wavelength indication error and wavelength repeatability can be met.
Claims
1. A spectrometer probe device for calibrating the wavelength of a light source of a formaldehyde detector, characterized in that: The invention comprises a sleeve (1) whose outer diameter is not greater than the diameter of a colorimetric cell (202); a light inlet slot (2) is provided on the side of the bottom end of the sleeve (1); a reflector (3) is fixedly mounted on the inner wall of the bottom end of the sleeve (1); a mounting seat (4) is fixedly mounted on the top of the sleeve (1); a rubber gasket (6) is movably sleeved in the middle of the mounting seat (4); and the bottom end of a spectrometer probe (100) is inserted into the middle of the rubber gasket (6).
2. A spectrometer probe device for calibrating the wavelength of a light source of a formaldehyde detector according to claim 1, characterized in that: The height of the light inlet slot (2) is not less than the height of the reflector (3), and the width of the light inlet slot (2) is not less than the width of the reflector (3).
3. The spectrometer probe device for calibrating the wavelength of the light source of a formaldehyde detector according to claim 1, characterized in that: The angle between the reflector (3) and the horizontal line is 45°.
4. The spectrometer probe device for calibrating the wavelength of the light source of a formaldehyde detector according to claim 1, characterized in that: An external thread is integrally formed on the surface of the mounting seat (4), a height adjustment seat (5) is threadedly mounted on the surface of the mounting seat (4), and a balance plate (51) is integrally formed on the bottom surface of the height adjustment seat (5).