Light source centering device for a hollow cathode optical spectrometer

Abstract

This application discloses a light source alignment device for a hollow cathode photoelectric spectrometer. The device includes a first-direction motion track, a second-direction motion track, a third-direction motion track, a hollow cathode lamp, a lamp holder, a driver, and a controller. The first-direction motion track, the second-direction motion track, and the third-direction motion track are arranged in a three-dimensional spatial coordinate system. The hollow cathode lamp is fixed to the lamp holder. The output terminal of the controller is connected to the control signal input terminal of the driver. The actuating terminal of the driver is connected to the lamp holder via a transmission device to drive the hollow cathode lamp fixed to the lamp holder to move along the first-direction motion track, the second-direction motion track, and the third-direction motion track. In this embodiment, the offset of the light source is corrected in three dimensions, which can improve the accuracy of light source correction and thus improve the reliability of the hollow cathode photoelectric spectrometer.

Description

Technical Field

[0001] This application relates to the field of instrument technology, and in particular to a light source alignment device for a hollow cathode photoelectric spectrometer. Background Technology

[0002] Hollow cathode photoelectric spectrometers can achieve quantitative analysis of trace and ultra-trace elements in various fusible and refractory solid materials, such as high-temperature alloys, steel, aluminum alloys, titanium alloys, magnesium alloys, and pure metals. These spectrometers feature low detection limits, high sensitivity, good stability, and the ability to simultaneously detect and analyze more than 30 elements with spectral lines between 170 and 430 nm. They are equipped with automatic electrode preprocessing, automatic optical path alignment, automatic spectral tracing and calibration, real-time display of current-time and intensity-time curves, automatic start / stop, multi-spectral overlay, and powerful data processing capabilities. They provide a simple and efficient analytical method for production and scientific research in the field of solid material testing and inspection.

[0003] However, this instrument has high requirements for the light source, requiring both stability during use and preventing positional shifts. Related technologies have relatively low accuracy in correcting for light source positional shifts, leading to lower reliability of the hollow cathode photoelectric spectrometer. Utility Model Content

[0004] To address the aforementioned issues, this application provides a light source alignment device for a hollow cathode photoelectric spectrometer, which corrects any shifts in the light source position and improves the reliability of the hollow cathode photoelectric spectrometer.

[0005] The embodiments of this application disclose the following technical solutions:

[0006] In a first aspect, embodiments of this application provide a light source alignment device for a hollow cathode photoelectric spectrometer, comprising: a first direction motion track, a second direction motion track, a third direction motion track, a hollow cathode lamp, a lamp holder, a driver, and a controller;

[0007] The first direction motion track, the second direction motion track, and the third direction motion track are set in a three-dimensional spatial coordinate manner;

[0008] The hollow cathode lamp is fixed on the lamp holder;

[0009] The controller's output is connected to the driver's control signal input.

[0010] The actuator is connected to the lamp holder via a transmission device to drive the hollow cathode lamp fixed on the lamp holder to move on the first direction movement track, the second direction movement track and the third direction movement track.

[0011] In one possible embodiment, the light source centering device further includes: a first sensor, a second sensor, and a third sensor;

[0012] The output terminals of the first sensor, the second sensor, and the third sensor are respectively connected to the input terminal of the controller; wherein, the first sensor is installed at the end of the first direction motion track, the second sensor is installed at the end of the second direction motion track, and the third sensor is installed at the end of the third direction motion track.

[0013] The first sensor is used to detect the position of the hollow cathode lamp on the first direction of its movement track.

[0014] The second sensor is used to detect the position of the hollow cathode lamp on the second direction motion track;

[0015] The third sensor is used to detect the position of the hollow cathode lamp on the third-direction motion track.

[0016] In one possible embodiment, the light source centering device further includes: a first protective device, a second protective device, and a third protective device;

[0017] The output terminals of the first protection device, the second protection device, and the third protection device are respectively connected to the input terminal of the controller; wherein, the first protection device is installed at the end of the first direction motion track, the second protection device is installed at the end of the second direction motion track, and the third protection device is installed at the end of the third direction motion track.

[0018] The first protective device is used to protect the hollow cathode lamp that moves on the first direction of the track.

[0019] The second protective device is used to protect the hollow cathode lamp that moves on the second direction movement track;

[0020] The third protective device is used to protect the hollow cathode lamp moving on the third-direction motion track.

[0021] In one possible embodiment, the first protective device, the second protective device, and the third protective device include at least one of a limiter, a position sensor, and a camera.

[0022] In one possible embodiment, the controller is configured to: obtain a first centering position of the hollow cathode lamp on the first direction motion track based on the distance between the hollow cathode lamp and the origin on the first direction motion track and the distance between the hollow cathode lamp and the lens barrel, wherein the origin is the intersection of the first direction motion track, the second direction motion track, and the third direction motion track; control the hollow cathode lamp to move to the first centering position on the first direction motion track to obtain initial positions of the hollow cathode lamp on the second direction motion track and the third direction motion track, respectively; based on the initial position of the hollow cathode lamp on the second direction motion track, use a single-axis centering method on the second direction motion track to obtain a second centering position that maximizes the spectral intensity on the second direction motion track; based on the initial position of the hollow cathode lamp on the third direction motion track, use a single-axis centering method on the third direction motion track to obtain a third centering position that maximizes the spectral intensity on the third direction motion track; and control the hollow cathode lamp to move to the second centering position on the second direction motion track and to the third centering position on the third direction motion track.

[0023] In one possible embodiment, the controller is specifically configured to scan the hollow cathode lamp within a scanning range f, centered on its initial position h on the second-direction movement track, to obtain a first spectral intensity-position relationship diagram; obtain the first position H corresponding to the maximum spectral intensity in the first spectral intensity-position relationship diagram; if the absolute difference between the first position H and the initial position h of the hollow cathode lamp on the second-direction movement track is less than a preset threshold θ, then scan the hollow cathode lamp n times within the scanning range f, centered on the first position H, to obtain a second spectral intensity-position relationship diagram, where n is an integer greater than or equal to 3; obtain the second positions H1 to Hn corresponding to the maximum spectral intensity in each of the second spectral intensity-position relationship diagrams; if the absolute difference between any two second positions H1 to Hn is also less than the preset threshold θ, then the final first position H is the second centering position of the hollow cathode lamp on the second-direction movement track; otherwise, let the first position H be the initial position h, i.e., h = H, and repeat the above steps until the second centering position of the hollow cathode lamp on the second-direction movement track is obtained; or...

[0024] Using the initial position h of the hollow cathode lamp on the third-direction motion track as the center, the hollow cathode lamp is scanned within the scanning range f to obtain a first spectral intensity-position relationship diagram. The first position H corresponding to the maximum spectral intensity in the first spectral intensity-position relationship diagram is obtained. If the absolute difference between the first position H and the initial position h of the hollow cathode lamp on the third-direction motion track is less than a preset threshold θ, then the hollow cathode lamp is scanned n times within the scanning range f with the first position H as the center to obtain a second spectral intensity-position relationship diagram, where n is an integer greater than or equal to 3. The second positions H1 to Hn corresponding to the maximum spectral intensity in each second spectral intensity-position relationship diagram are obtained. If the absolute difference between any two second positions H1 to Hn is also less than the preset threshold θ, then the final first position H is the third centering position of the hollow cathode lamp on the third-direction motion track. Otherwise, the first position H is set to the initial position h, i.e., h = H, and the above steps are repeated until the third centering position of the hollow cathode lamp on the third-direction motion track is obtained.

[0025] To improve the reliability of hollow cathode photoelectric spectrometers, this application provides a light source alignment device for a hollow cathode photoelectric spectrometer, comprising: a first-direction motion track, a second-direction motion track, a third-direction motion track, a hollow cathode lamp, a lamp holder, a driver, and a controller; the first-direction motion track, the second-direction motion track, and the third-direction motion track are arranged in a three-dimensional spatial coordinate manner; the hollow cathode lamp is fixed on the lamp holder; the output terminal of the controller is connected to the control signal input terminal of the driver; the actuating terminal of the driver is connected to the lamp holder through a transmission device to drive the hollow cathode lamp fixed on the lamp holder to move on the first-direction motion track, the second-direction motion track, and the third-direction motion track. In this application embodiment, the light source alignment device includes motion tracks in three directions, allowing the hollow cathode lamp to move in three directions, correcting any offset in the light source position, and improving the reliability of the hollow cathode photoelectric spectrometer. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A schematic diagram of a light source alignment device for a hollow cathode photoelectric spectrometer provided in this application embodiment;

[0028] Figure 2 A first spectral intensity-position relationship map in a second direction is provided for embodiments of this application;

[0029] Figure 3 A second first spectral intensity-position relationship diagram in a second direction is provided for embodiments of this application;

[0030] Figure 4 A final first spectral intensity-position relationship diagram in a second direction is provided for embodiments of this application;

[0031] Figure 5 A second spectral intensity-position relationship diagram in a second direction is provided for embodiments of this application;

[0032] Figure 6 Another second spectral intensity-position relationship diagram in a second direction is provided in the embodiments of this application;

[0033] Figure 7 Another second spectral intensity-position relationship diagram in a second direction is provided for embodiments of this application;

[0034] Figure 8 A first spectral intensity-position relationship map of a third direction is provided in an embodiment of this application;

[0035] Figure 9 A third-party second first spectral intensity-position relationship diagram is provided for embodiments of this application;

[0036] Figure 10 A third-party final spectral intensity-position relationship diagram is provided for embodiments of this application;

[0037] Figure 11 A third-direction second spectral intensity-position relationship diagram is provided in the embodiments of this application;

[0038] Figure 12 Another third-direction second spectral intensity-position relationship diagram provided in this application embodiment;

[0039] Figure 13 This application provides yet another third-party second spectral intensity-position relationship diagram. Detailed Implementation

[0040] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0041] The terms "first" and "second," etc., used in the specification and claims of this application are used to distinguish different objects, not to describe a specific order of objects. For example, "first switching device" and "second switching device," etc., are used to distinguish different switching devices, not to describe a specific order of switching devices.

[0042] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0043] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the embodiments of this application will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0044] See Figure 1 The figure is a schematic diagram of a light source alignment device for a hollow cathode photoelectric spectrometer provided in an embodiment of this application.

[0045] like Figure 1 As shown, the light source alignment device of the hollow cathode photoelectric spectrometer includes: a first direction motion track 100, a second direction motion track 200, a third direction motion track 300, a hollow cathode lamp 400, a lamp holder 500, a driver 600, and a controller (not shown in the figure).

[0046] The first direction motion track, the second direction motion track, and the third direction motion track are set in a three-dimensional spatial coordinate manner;

[0047] The hollow cathode lamp is fixed on the lamp holder;

[0048] The controller's output is connected to the driver's control signal input.

[0049] The actuator is connected to the lamp holder via a transmission device to drive the hollow cathode lamp fixed on the lamp holder to move on the first direction movement track, the second direction movement track and the third direction movement track.

[0050] In this embodiment, the light source centering device includes three-directional motion tracks, allowing the hollow cathode lamp to move in three directions, correcting any shifts in the light source position, and improving the reliability of the hollow cathode photoelectric spectrometer.

[0051] In one possible embodiment, the light source alignment device of the hollow cathode photoelectric spectrometer further includes: a first sensor, a second sensor, and a third sensor.

[0052] The output terminals of the first sensor, the second sensor, and the third sensor are respectively connected to the input terminal of the controller; wherein, the first sensor is installed at the end of the first direction motion track 100, the second sensor is installed at the end of the second direction motion track 200, and the third sensor is installed at the end of the third direction motion track 300.

[0053] The first sensor is used to detect the position of the hollow cathode lamp 400 on the first direction motion track 100;

[0054] The second sensor is used to detect the position of the hollow cathode lamp 400 on the second direction motion track 200;

[0055] The third sensor is used to detect the position of the hollow cathode lamp 400 on the third-direction motion track 300.

[0056] After the first, second, and third sensors measure the position information of the hollow cathode lamp 400 on the first direction motion track 100, the second direction motion track 200, and the third direction motion track 300, respectively, they send the position information to the controller. The controller then performs the light source alignment of the hollow cathode photoelectric spectrometer using the methods described in STEP1-STEP5 below:

[0057] STEP 1: Based on the distance between the hollow cathode lamp and the origin in the first direction and the distance between the hollow cathode lamp and the lens tube, obtain the first centering position of the hollow cathode lamp in the first direction; where the origin is the intersection of the first direction, the second direction and the third direction.

[0058] In one possible implementation, the horizontal distance between the hollow cathode lamp body and the lens barrel is set to β. Then, any one or a combination of ultrasonic ranging, laser ranging, infrared ranging, radar ranging, and machine vision is used with the help of a ranging algorithm to determine the distance Q (the distance between the origin and the hollow cathode lamp body) that the lamp body needs to move in the first direction (x-axis), so that the horizontal distance between the hollow cathode lamp body and the lens barrel is β, and Q is the first centering position of the lamp body in the first direction (x-axis).

[0059] In this embodiment, β = 2mm is set. With the cooperation of laser ranging technology and ranging algorithm, the distance Q that the lamp body needs to move in the first direction (x-axis) is determined to be 50mm. The laser ranging sensor used is a micron-level high-precision laser ranging displacement sensor.

[0060] STEP2: Control the hollow cathode lamp to move to the first centering position in the first direction, and obtain the initial positions of the hollow cathode lamp in the second and third directions respectively.

[0061] For example, in this embodiment, let X = Q, and control the hollow cathode lamp body to move to the coordinate P0(X, 0, 0) corresponding to the first centering position.

[0062] STEP3: Based on the initial position of the hollow cathode lamp in the second direction, use the single-axis alignment method in the second direction to obtain the second alignment position that maximizes the spectral intensity in the second direction.

[0063] It should be understood that the method of using the single-axis centering method in the second direction (y-axis) is the same as the method of using the single-axis centering method in the third direction (z-axis). The specific process of using the single-axis centering method in the second direction (y-axis) and the third direction (z-axis) will be introduced below.

[0064] For example, in this embodiment, the final second centering position (final first position H value) obtained by the hollow cathode lamp in the second direction (y-axis) is 0.10 mm.

[0065] Furthermore, the single-axis alignment method includes steps STEP31-STEP38:

[0066] STEP31: Parameter initialization, which reads the initial position h of the hollow cathode lamp body in the second direction (y-axis), the scan range f, the stop threshold θ, and other set values.

[0067] For example, in this embodiment, let h = 0 mm, f = 10 mm, and θ = 0.3 mm.

[0068] STEP32: Using the initial position h of the hollow cathode lamp in the second direction (y-axis) as the center, scan the hollow cathode lamp within the scanning range f to obtain the first spectral intensity-position relationship diagram.

[0069] For example, in this embodiment, with the initial position h = 0 mm of the hollow cathode lamp in the second direction (y-axis) as the center, the hollow cathode lamp is scanned within a scanning range f = 10 mm to obtain the first spectral intensity-position relationship map in the second direction (y-axis), as shown below. Figure 2 As shown.

[0070] STEP33: Obtain the first position H corresponding to the maximum spectral intensity in the first spectral intensity-position relationship graph.

[0071] For example, in this embodiment, in Figure 2 The maximum spectral intensity is 804.20, which corresponds to a position of 2.29 mm. That is, the first position H at this time is 2.29 mm.

[0072] STEP34: Determine the position where the spectral intensity of the hollow cathode lamp is always at its maximum in the second direction (y-axis), i.e., determine the relationship between the absolute difference between the first position H and the initial position h of the hollow cathode lamp in the second direction (y-axis) and the preset threshold θ:

[0073] If the absolute difference between the first position H and the initial position h of the hollow cathode lamp in the second direction (y-axis) is less than the preset threshold θ, then the first position H at this time is the position corresponding to the maximum spectral intensity of the hollow cathode lamp in the second direction (y-axis); otherwise, let the first position H be the initial position h, that is, h = H, and repeat steps STEP32-STEP34 until the position corresponding to the maximum spectral intensity of the hollow cathode lamp in the second direction (y-axis) is obtained.

[0074] In this embodiment, Figure 2 In the diagram, the maximum spectral intensity is 804.20, corresponding to a position of 2.29 mm. Therefore, the first position H at this point is 2.29 mm. Since |Hh|=|2.29-0|=2.29mm>θ=0.3mm, let h=H=2.29mm. Then repeat steps STEP32-STEP34 to obtain the second first spectral intensity-position relationship diagram in the second direction (y-axis), as shown below. Figure 3 As shown.

[0075] exist Figure 3 In the diagram, the maximum spectral intensity is 901.04, corresponding to a position of 1.09 mm, meaning the first position H is 1.09 mm. Since |Hh| = |1.09 - 2.29| = 1.20 mm > θ = 0.3 mm, let h = H = 1.09 mm. Repeat steps STEP32-STEP34 until |Hh| < θ to obtain the final first spectral intensity-position relationship diagram in the second direction (y-axis), as shown below. Figure 4 As shown.

[0076] exist Figure 4 In the middle, the maximum spectral intensity is 897.00, which corresponds to a position of 0.10mm. At this time, the first position H = h = 0.10mm, that is, the spectral intensity of the hollow cathode lamp in the second direction (y-axis) is always the maximum, and the corresponding position is 0.10mm.

[0077] STEP35: If the absolute difference between the first position H and the initial position h of the hollow cathode lamp in the second direction (y-axis) is less than the preset threshold θ, then scan the hollow cathode lamp n times with the first position H as the center within the scanning range f to obtain the second spectral intensity-position relationship diagram, where n is an integer greater than or equal to 3.

[0078] For example, in this embodiment, in Figure 4In the image, the maximum spectral intensity is 897.00, corresponding to a position of 0.10 mm. At this point, the first position is H = h = 0.10 mm. Since |Hh| = |0.10 - 0.10| = 0.00 mm < θ = 0.3 mm, three scans can be performed on the hollow cathode lamp within a scanning range f = 10 mm, centered on the first position h = H = 0.10 mm, to obtain the second spectral intensity-position relationship diagram, as shown below. Figures 5-7 As shown.

[0079] It should be understood that the three scans in this embodiment are merely exemplary, and the number of scans is not limited in this embodiment.

[0080] STEP36: Obtain the second position H1 to Hn corresponding to the maximum spectral intensity in each second spectral intensity-position relationship diagram.

[0081] For example, in this embodiment, in Figures 5-7 The corresponding maximum spectral intensities are 897.00, 897.00, and 897.00, respectively, and their corresponding positions are 0.10 mm, 0.10 mm, and 0.10 mm, respectively, i.e., H1 = H2 = H3 = 0.10 mm.

[0082] STEP 37: Determine the second alignment position of the hollow cathode lamp in the second direction (y-axis), that is, determine the relationship between the absolute difference between any two second positions H1 to Hn and the preset threshold θ:

[0083] If the absolute difference between any two second positions H1 to Hn is less than the preset threshold θ, then the final first position H in step STEP34 is the second centering position of the hollow cathode lamp in the second direction (y-axis); otherwise, let the first position H be the initial position h, i.e., h = H, and repeat steps STEP32-STEP37 until the second centering position of the hollow cathode lamp in the second direction (y-axis) is obtained.

[0084] For example, in this embodiment, in Figures 5-7 In the middle, because:

[0085] |H2-H1|=|0.10-0.10|=0.00mm<θ=0.3mm

[0086] |H3-H1|=|0.10-0.10|=0.00mm<θ=0.3mm

[0087] |H3-H2|=|0.10-0.10|=0.00mm<θ=0.3mm

[0088] That is, in the second positions H1 to H3, the absolute difference between each two second positions is less than the preset threshold θ. Therefore, the final first position H = 0.10 mm in step STEP34 is the second centering position of the hollow cathode lamp in the second direction (y-axis). In other words, the second centering position of the hollow cathode lamp in the second direction (y-axis) is 0.10 mm.

[0089] STEP38: Save and output the final obtained first position H value, and end the single-axis centering method.

[0090] STEP4: Based on the initial position of the hollow cathode lamp in the third direction, use the single-axis centering method in the third direction to obtain the third centering position that maximizes the spectral intensity in the third direction.

[0091] For example, in this embodiment, the third centering position (final first position H value) finally obtained by the hollow cathode lamp in the third direction (z-axis) is -0.10mm.

[0092] Similarly, the single-axis centering method on a third direction (z-axis) includes steps STEP41-STEP48:

[0093] STEP41: Parameter initialization, which reads the initial position h of the hollow cathode lamp body in the third direction (z-axis), the scan range f, the stop threshold θ, and other set values.

[0094] For example, in this embodiment, let h = 0 mm, f = 10 mm, and θ = 0.3 mm.

[0095] STEP42: Using the initial position h of the hollow cathode lamp on the third direction (z-axis) as the center, scan the hollow cathode lamp within the scanning range f to obtain the first spectral intensity-position relationship diagram.

[0096] For example, in this embodiment, with the initial position h = 0 mm of the hollow cathode lamp in the third direction (z-axis) as the center, the hollow cathode lamp is scanned within a scanning range f = 10 mm to obtain the first spectral intensity-position relationship map in the third direction (z-axis), as shown below. Figure 8 As shown.

[0097] STEP43: Obtain the first position H corresponding to the maximum spectral intensity in the first spectral intensity-position relationship graph.

[0098] For example, in this embodiment, in Figure 8 The maximum spectral intensity is 10567.33, which corresponds to a position of 2.31 mm. That is, the first position H at this time is 2.31 mm.

[0099] STEP44: Determine the position where the spectral intensity of the hollow cathode lamp is always at its maximum in the third direction (z-axis), i.e., determine the relationship between the absolute difference between the first position H and the initial position h of the hollow cathode lamp in the third direction (z-axis) and the preset threshold θ:

[0100] If the absolute difference between the first position H and the initial position h of the hollow cathode lamp in the third direction (z-axis) is less than the preset threshold θ, then the first position H is the position corresponding to the maximum spectral intensity of the hollow cathode lamp in the third direction (z-axis); otherwise, let the first position H be the initial position h, i.e., h = H, and repeat steps STEP42-STEP44 until the position corresponding to the maximum spectral intensity of the hollow cathode lamp in the third direction (z-axis) is obtained.

[0101] In this embodiment, Figure 8 In the diagram, the maximum spectral intensity is 10567.33, corresponding to a position of 2.31 mm. Therefore, the first position H at this point is 2.31 mm. Since |Hh|=|2.31-0|=2.31mm>θ=0.3mm, let h=H=2.31mm, and repeat steps STEP42-STEP44 to obtain the second first spectral intensity-position relationship diagram on the third direction (z-axis), as shown below. Figure 9 As shown.

[0102] exist Figure 9 In the diagram, the maximum spectral intensity is 11711.42, corresponding to a position of 1.09 mm, meaning the first position H is 1.09 mm. Since |Hh| = |1.09 - 2.31| = 1.22 mm > θ = 0.3 mm, let h = H = 1.09 mm. Repeat steps STEP42-STEP44 until |Hh| < θ, obtaining the final first spectral intensity-position relationship diagram on the third direction (z-axis), as shown below. Figure 10 As shown.

[0103] exist Figure 10 In the middle, the maximum spectral intensity is 11708.00, which corresponds to a position of -0.10mm. At this time, the first position H = h = -0.10mm, that is, the position corresponding to the maximum spectral intensity of the hollow cathode lamp in the third direction (z-axis) is always -0.10mm.

[0104] STEP45: If the absolute difference between the first position H and the initial position h of the hollow cathode lamp in the third direction (z-axis) is less than the preset threshold θ, then scan the hollow cathode lamp n times with the first position H as the center within the scanning range f to obtain the second spectral intensity-position relationship diagram, where n is an integer greater than or equal to 3.

[0105] For example, in this embodiment, in Figure 10 In the image, the maximum spectral intensity is 11708.00, corresponding to a position of -0.10 mm. At this point, the first position is H = h = -0.10 mm. Since |Hh| = |-0.10 - (-0.10)| = 0.00 mm < θ = 0.3 mm, three scans can be performed on the hollow cathode lamp within a scanning range f = 10 mm, centered on the first position h = H = -0.10 mm, to obtain the second spectral intensity-position relationship diagram, as shown below. Figures 11-13 As shown.

[0106] It should be understood that the three scans in this embodiment are merely exemplary, and the number of scans is not limited in this embodiment.

[0107] STEP46: Obtain the second position H1 to Hn corresponding to the maximum spectral intensity in each second spectral intensity-position relationship diagram.

[0108] For example, in this embodiment, in Figures 11-13 The corresponding maximum spectral intensities are 11708.00, 11708.00, and 11708.00, respectively, and their corresponding positions are -0.10mm, -0.10mm, and -0.10mm, respectively, i.e., H1 = H2 = H3 = -0.10mm.

[0109] STEP47: Determining the third alignment position of the hollow cathode lamp in the third direction (z-axis), i.e., determining the relationship between the absolute difference between any two second positions H1 to Hn and the preset threshold θ:

[0110] If the absolute difference between any two second positions H1 to Hn is also less than the preset threshold θ, then the final first position H in step STEP44 is the third centering position of the hollow cathode lamp in the third direction (z-axis); otherwise, let the first position H be the initial position h, i.e., h = H, and repeat steps STEP42-STEP47 until the third centering position of the hollow cathode lamp in the third direction (z-axis) is obtained.

[0111] For example, in this embodiment, in Figures 11-13 In the middle, because:

[0112] |H2-H1|=|-0.10-(-0.10)|=0.00mm<θ=0.3mm

[0113] |H3-H1|=|-0.10-(-0.10)|=0.00mm<θ=0.3mm

[0114] |H3-H2|=|-0.10-(-0.10)|=0.00mm<θ=0.3mm

[0115] That is, in the second positions H1 to H3, the absolute difference between each two second positions is also less than the preset threshold θ. Therefore, the final first position H = -0.10mm in step STEP44 is the third centering position of the hollow cathode lamp in the third direction (z-axis). That is, the third centering position of the hollow cathode lamp in the third direction (z-axis) is -0.10mm.

[0116] STEP48: Save and output the final obtained first position H value, and end the single-axis centering method.

[0117] STEP 5: Control the hollow cathode lamp to move to the second centering position in the second direction, and to the third centering position in the third direction.

[0118] The hollow cathode photoelectric spectrometer light source alignment device in this embodiment corrects the offset of the light source in three dimensions, which can improve the accuracy of light source correction and thus improve the reliability of the hollow cathode photoelectric spectrometer.

[0119] In addition, the light source alignment device of the hollow cathode photoelectric spectrometer in this application embodiment may also include: a first protection device, a second protection device and a third protection device.

[0120] The output terminals of the first protection device, the second protection device, and the third protection device are respectively connected to the input terminal of the controller; wherein, the first protection device is installed at the end of the first direction motion track 100, the second protection device is installed at the end of the second direction motion track 200, and the third protection device is installed at the end of the third direction motion track 300.

[0121] The first protective device is used to protect the hollow cathode lamp that moves on the first direction movement track 100.

[0122] The second protective device is used to protect the hollow cathode lamp that moves on the second direction movement track 200.

[0123] The third protection device is used to protect the hollow cathode lamp moving on the third-direction motion track 300.

[0124] In one possible embodiment, the first protective device, the second protective device, and the third protective device include at least one of a limiter, a position sensor, and a camera.

[0125] Taking the first protective device as an example, the first protective device may include any one of a limit switch, a position sensor, and a camera; it may include any two of these three devices (e.g., a limit switch and a position sensor, a limit switch and a camera, or a position sensor and a camera); or it may include a limit switch, a position sensor, and a camera simultaneously. It should be understood that the structures of the second and third protective devices are the same as those of the first protective device, and will not be described again here.

[0126] For example, the protective devices (first protective device, second protective device and third protective device) in the embodiments of this application can prevent the lamp body from exceeding the maximum limit of the track when it moves on the track in a certain direction.

[0127] For example, the protective devices (first protective device, second protective device and third protective device) in the embodiments of this application can detect the distance between the lamp body and surrounding objects to prevent the lamp body from colliding with the lens barrel, equipment housing, etc.

[0128] In addition, the protective devices (first protective device, second protective device and third protective device) in this application embodiment can also monitor the status of the lamp body in real time (the lamp body is made of glass) so as to automatically shut down the instrument when the lamp body breaks.

Claims

1. A light source centering device for a hollow cathode optical spectrometer, comprising: include: First direction motion track, second direction motion track, third direction motion track, hollow cathode lamp, lamp holder, driver and controller; The first direction motion track, the second direction motion track, and the third direction motion track are arranged in a three-dimensional spatial coordinate manner; The hollow cathode lamp is fixed on the lamp holder; The output of the controller is connected to the control signal input of the driver. The actuator is connected to the lamp holder via a transmission device to drive the hollow cathode lamp fixed on the lamp holder to move on the first direction movement track, the second direction movement track, and the third direction movement track.

2. The optical source centering device of claim 1, wherein, The light source centering device further includes: a first sensor, a second sensor, and a third sensor; The output terminals of the first sensor, the second sensor, and the third sensor are respectively connected to the input terminal of the controller; wherein, the first sensor is installed at the end of the first direction motion track, the second sensor is installed at the end of the second direction motion track, and the third sensor is installed at the end of the third direction motion track. The first sensor is used to detect the position of the hollow cathode lamp on the movement track in the first direction; The second sensor is used to detect the position of the hollow cathode lamp on the second direction movement track; The third sensor is used to detect the position of the hollow cathode lamp on the third-direction motion track.

3. The light source centering device of claim 1, wherein, The light source centering device further includes: a first protection device, a second protection device, and a third protection device; The output terminals of the first protection device, the second protection device, and the third protection device are respectively connected to the input terminal of the controller; wherein, the first protection device is installed at the end of the first direction movement track, the second protection device is installed at the end of the second direction movement track, and the third protection device is installed at the end of the third direction movement track; The first protective device is used to protect the hollow cathode lamp that moves on the track in the first direction; The second protective device is used to protect the hollow cathode lamp that moves on the second direction track; The third protective device is used to protect the hollow cathode lamp as it moves on the third-direction motion track.

4. The optical source centering device of claim 3, wherein, The first protection device, the second protection device, and the third protection device include at least one of a limiter, a position sensor, and a camera.

5. The optical source centring device according to any of claims 1-4, characterised in that, The controller is configured to: obtain a first centering position of the hollow cathode lamp on the first direction motion track based on the distance between the hollow cathode lamp and the origin on the first direction motion track and the distance between the hollow cathode lamp and the lens barrel, wherein the origin is the intersection of the first direction motion track, the second direction motion track, and the third direction motion track; control the hollow cathode lamp to move to the first centering position on the first direction motion track to obtain initial positions of the hollow cathode lamp on the second direction motion track and the third direction motion track respectively; based on the initial position of the hollow cathode lamp on the second direction motion track, use a single-axis centering method on the second direction motion track to obtain a second centering position that maximizes the spectral intensity on the second direction motion track; based on the initial position of the hollow cathode lamp on the third direction motion track, use the single-axis centering method on the third direction motion track to obtain a third centering position that maximizes the spectral intensity on the third direction motion track; and control the hollow cathode lamp to move to the second centering position on the second direction motion track and to the third centering position on the third direction motion track.

6. The light source centering device of claim 5, wherein, The controller is specifically used to scan the hollow cathode lamp within a scanning range f, with the initial position h of the hollow cathode lamp on the second direction motion track as the center, to obtain a first spectral intensity-position relationship diagram; Obtain the first position H corresponding to the maximum spectral intensity in the first spectral intensity-position relationship diagram; if the absolute difference between the first position H and the initial position h of the hollow cathode lamp on the second direction movement track is less than a preset threshold θ, then obtain n scans of the hollow cathode lamp within the scanning range f, centered on the first position H, to obtain a second spectral intensity-position relationship diagram, where n is an integer greater than or equal to 3; obtain the second positions H1 to Hn corresponding to the maximum spectral intensity in each of the second spectral intensity-position relationship diagrams; if the absolute difference between any two second positions in H1 to Hn is also less than the preset threshold θ, then the final first position H is the second centering position of the hollow cathode lamp on the second direction movement track; otherwise, let the first position H be the initial position h, i.e., h = H, and repeat the above steps until the second centering position of the hollow cathode lamp on the second direction movement track is obtained; or, Using the initial position h of the hollow cathode lamp on the third-direction motion track as the center, the hollow cathode lamp is scanned within a scanning range f to obtain a first spectral intensity-position relationship diagram; the first position H corresponding to the maximum spectral intensity in the first spectral intensity-position relationship diagram is obtained; if the absolute difference between the first position H and the initial position h of the hollow cathode lamp on the third-direction motion track is less than a preset threshold θ, then the hollow cathode lamp is scanned n times with the first position H as the center within a scanning range f to obtain a second spectral intensity-position relationship diagram, where n is an integer greater than or equal to 3; the second positions H1 to Hn corresponding to the maximum spectral intensity in each of the second spectral intensity-position relationship diagrams are obtained; if the absolute difference between any two second positions in the second positions H1 to Hn is also less than the preset threshold θ, then the final first position H is the third centering position of the hollow cathode lamp on the third-direction motion track; otherwise, the first position H is set to the initial position h, i.e., h = H, and the above steps are repeated until the third centering position of the hollow cathode lamp on the third-direction motion track is obtained.

Images