Ultraviolet, visible and near-infrared spectrophotometer

Abstract

An ultraviolet, visible and near-infrared spectrophotometer is characterized in that the ultraviolet, visible and near-infrared spectrophotometer comprises a photometer body, a mounting rack, a micro motor, a lead screw, a limiting column, a moving block, a sample placing box, a height adjusting mechanism and an object detection sensor, the mounting rack is fixedly mounted in a sample chamber arranged on the photometer body through screws, and the lead screw is mounted on the mounting rack through a bearing; one end of the lead screw is connected with the micro motor, the lead screw is in threaded connection with a moving block, limiting holes formed in the two ends of the moving block are connected with limiting columns in a penetrating mode respectively, the two ends of each limiting column are connected to the mounting frame respectively, a sample containing box is mounted on the moving block, and a plurality of sample grooves are formed in the sample containing box. A height adjusting mechanism is arranged at the bottom in the sample groove, an object detection sensor is arranged on a vertical plate at one end of the mounting rack, the sample placing box is controlled to move through the micro motor, different samples are moved to detection points, and the operation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of infrared spectrophotometer equipment, in particular to an ultraviolet visible near-infrared spectrophotometer. Background Art

[0002] A combination of a UV-visible near-infrared spectrophotometer and a photometer is also called a spectrometer. An infrared spectrophotometer is a photoelectric analytical instrument that uses the selective absorption of light by a substance to perform qualitative and quantitative analysis of a substance. According to the principle of electromagnetic radiation, different substances have different selective absorption and different absorption spectra. The analysis of the absorption spectrum can be used to study the optical properties, internal structure and chemical composition of a substance.

[0003] The basic principle of infrared spectrophotometer is: the light emitted by the light source is divided into two beams with equal and symmetrical energy, one beam is the sample light passing through the sample, and the other beam is the reference light as a benchmark. After these two beams pass through the sample chamber and enter the photometer, they are modulated by the fan-shaped mirror at a certain frequency to form an alternating signal, and then the two beams are combined into one beam, and alternately pass through the incident slit to enter the monochromator, and the light beam is projected parallel to the grating through the off-axis parabolic mirror. After dispersion and passing through the exit slit, the high-order spectrum is filtered out by the filter, and then focused on the receiving surface of the detector through the ellipsoidal mirror. The detector converts the above alternating signal into a corresponding electrical signal, which is amplified by the amplifier and then transferred to the A / D conversion unit. After computer processing, the infrared absorption spectrum from high wavenumber to low wavenumber is obtained.

[0004] At present, a sample chamber for placing samples is provided on the box of the existing ultraviolet visible near-infrared spectrophotometer. Now, when testing and analyzing multiple samples, the corresponding samples are manually controlled to move to the detection point through which the light beam passes, which causes inconvenience to the user. In addition, there are errors in the manual control of sample movement, which offsets the detection point and causes inaccurate detection data. In addition, the sample slot for placing samples cannot be placed and tested for samples contained in cuvettes of different heights, so that the adapted sample slot needs to be replaced during the test. For this reason, the existing photometer is optimized and improved. Utility Model Content

[0005] In view of the above technical problems, the utility model provides an ultraviolet visible near-infrared spectrophotometer, which is characterized by comprising a photometer body, a mounting frame, a micro motor, a screw rod, a limit column, a moving block, a sample placement box, a height adjustment mechanism, and an object detection sensor. The mounting frame is fixed with a mounting frame by screws in a sample chamber arranged on the photometer body, a screw rod is installed on the mounting frame through a bearing, one end of the screw rod is connected to the micro motor, the moving block is threadedly connected on the screw rod, the limit holes arranged at both ends of the moving block are respectively passed through and connected by the limit columns, the two ends of the limit columns are respectively connected to the mounting frame, a sample placement box is installed on the moving block, a plurality of sample slots are arranged on the sample placement box, a height adjustment mechanism is arranged at the bottom of the sample slot, and an object detection sensor is arranged on a vertical plate at one end of the mounting frame.

[0006] The height adjustment mechanism is composed of an electric telescopic rod and a placement plate. The electric telescopic rod is installed on the bottom of the sample slot. The telescopic end of the electric telescopic rod is connected to the bottom surface of the placement plate. The protrusions arranged at both ends of the placement plate are connected to the slide grooves arranged on the wall of the sample slot.

[0007] Specifically, another group of groove walls of the sample groove are provided with mounting projection holes, which are used for light beams to pass through the projection holes and place samples in the sample groove to detect the samples.

[0008] Specifically, a control panel is installed on the photometer body, a controller arranged in the control panel is connected with the micro motor, the object detection sensor and each electric telescopic rod, and control keys are arranged on the control panel.

[0009] Specifically, the sample chamber on the photometer body is provided with an opening and closing cover.

[0010] Beneficial effects of the utility model:

[0011] The utility model controls the movement of the sample placement box by operating the control panel on the photometer body and starting the micro motor to change the samples in different sample slots and move them to the detection point of the spectrum analysis for spectrum analysis. The operation is convenient. The object detection sensor detects the movement of the moving block and displays the information of the sample slot corresponding to the detection point on the control panel, so that the staff can know which sample slot is detected and record the information.

[0012] The utility model installs a height adjustment mechanism in the sample slot, and an operator can control the height of a placement plate in the placement slot through a control key on a control panel, which is suitable for placing samples contained in cuvettes of different heights for placement testing. In addition, the placement plate can also be controlled to move during the testing process, thereby realizing spectral analysis of different height positions of the same sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of an ultraviolet-visible-near-infrared spectrophotometer of the utility model;

[0014] Figure 2 This is a structural schematic diagram of a UV-visible-near-infrared spectrophotometer without a card box cover of the utility model;

[0015] Figure 3 This is a schematic cross-sectional structure diagram of a sample placement box of an ultraviolet-visible-near-infrared spectrophotometer according to the utility model;

[0016] As shown in the figure: 1. Photometer body, 11. Sample chamber, 12. Opening and closing cover, 13. Control panel, 2. Mounting bracket, 3. Micro motor, 4. Screw, 5. Moving block, 51. Limiting column, 6. Sample placement box, 61. Sample slot, 62. Projection hole, 63. Slide slot, 7. Bolt, 8. Object detection sensor. DETAILED DESCRIPTION

[0017] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0019] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0020] Example 1

[0021] As shown in the figure, an opening and closing cover 12 is installed on the sample chamber 11 provided on the photometer body 1, a mounting frame 2 is fixed by screws in the sample chamber 11 provided on the photometer body 1, a screw rod 4 is installed on the mounting frame 2 through a bearing, one end of the screw rod 4 is connected to a micro motor 3, a moving block 5 is threadedly connected to the screw rod 3, limiting holes provided at both ends of the moving block 5 are respectively passed through and connected by limiting columns 51, both ends of the limiting columns 51 are respectively connected to the mounting frame 2, a sample placement box 6 is installed on the moving block 5, a plurality of sample slots 61 are provided on the sample placement box 6, an object detection sensor 8 is provided on a vertical plate at one end of the mounting frame 2,

[0022] A height adjustment mechanism is arranged at the bottom of the sample slot 61, and the height adjustment mechanism consists of an electric telescopic rod 71 and a placement plate 72. The electric telescopic rod 71 is arranged on the bottom of the sample slot 61, and the telescopic end of the electric telescopic rod 71 is connected to the bottom surface of the placement plate 72. The protrusions arranged at both ends of the placement plate 72 are connected to the slide groove 63 arranged on the slot wall of the sample slot 61. A projection hole 62 is arranged on another group of slot walls of the sample slot 61, so as to detect the sample by placing a light beam through the projection hole through the sample slot 61 and placing the sample therein.

[0023] A control panel 13 is installed on the photometer body 1 , a controller in the control panel 13 is connected with the micro motor 3 , the object detection sensor 8 and each electric telescopic rod 71 , and control keys are arranged on the control panel 13 .

[0024] Example 2

[0025] When performing spectral analysis, the operator puts different samples in cuvettes, then opens the opening and closing cover 12, places the colorimetric surface in the sample slot 61, and operates the control panel on the photometer body 1 to start the micro motor 3 through the control key. The micro motor 3 controls the screw rod 4 to rotate, and the moving block 5 to move axially, and controls the movement of the sample placement box 6 to switch the samples in different sample slots 61 to move to the detection point of spectral analysis for spectral analysis, so that the detection and analysis are convenient to operate. Spectral analysis is to emit a light beam through the light source in the photometer body, wherein one light beam enters from the projection hole 62 on the sample slot 61, and the light beam passes through the cuvette placed in the sample slot 61 and then hits the detector set in the photometer body 1 to perform spectral analysis.

[0026] The object detection sensor 8 installed on the mounting frame 2 detects the movement of the moving block 5, and transmits the information of the sample slot 61 corresponding to the detection point to the controller, which is then transmitted to the control panel 13 for display, so that the staff can understand which sample slot is being detected and record the information;

[0027] The utility model installs a height adjustment mechanism in the sample slot 61, and the operator can control the electric telescopic rod 71 in the placement slot 61 through the control key of the control panel 13, and control the height of the placement plate 72 by extending and retracting the electric telescopic rod 71. It is suitable for placing samples contained in cuvettes of different heights for placement detection, and there is no need to always replace the sample placement box. In addition, the placement plate 72 can also be controlled to move during the detection process, so that different height positions of the same sample can be moved to the position of the projection hole 63, and spectral analysis can be performed on different positions of the same sample.

[0028] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The various components mentioned in the utility model are common technologies in the existing field. The technicians in this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A UV-visible near-infrared spectrophotometer, characterized in that The invention comprises a photometer body, a mounting frame, a micro motor, a screw rod, a limiting column, a moving block, a sample placement box, a height adjustment mechanism and an object detection sensor. The mounting frame is fixedly installed in a sample chamber arranged on the photometer body by screws. The screw rod is installed on the mounting frame through a bearing. One end of the screw rod is connected to the micro motor. The moving block is threadedly connected to the screw rod. The limiting holes arranged at both ends of the moving block are respectively passed through and connected by limiting columns. Both ends of the limiting columns are respectively connected to the mounting frame. The sample placement box is installed on the moving block. A plurality of sample slots are arranged on the sample placement box. A height adjustment mechanism is arranged at the bottom of the sample slots. The object detection sensor is arranged on a vertical plate at one end of the mounting frame.

2. A UV-visible near-infrared spectrophotometer according to claim 1, characterized in that The height adjustment mechanism consists of an electric telescopic rod and a placement plate. The electric telescopic rod is installed on the bottom of the sample slot, the telescopic end of the electric telescopic rod is connected to the bottom surface of the placement plate, and the protrusions arranged at both ends of the placement plate are connected to the slide groove arranged on the wall of the sample slot.

3. A UV-visible-near-infrared spectrophotometer according to claim 1, characterized in that Another group of groove walls on the sample groove is provided with mounting projection holes.

4. The ultraviolet-visible-near-infrared spectrophotometer according to claim 1, characterized in that A control panel is arranged on the photometer body.

Images