Statistical chart analysis device

Abstract

The application relates to the field of display devices, in particular to a statistical chart analysis device, which comprises a mounting frame provided with a plate surface and a plurality of mounting cavities distributed at equal intervals, a plurality of spotlight lamps are arranged in the mounting cavities, the plate surface is made of transparent material, and a coating layer with a porous structure but not transparent is coated on the plate surface. The plate surface is provided with light on the inner side, and a light-shielding horizontal strip is arranged on the inner side of the plate surface, so that uniform scale lines are displayed on the plate surface, people can quickly connect the scale lines to make a broken line statistical chart, and the inner side of the plate surface is provided with an adjusting device, so that the adjusting device can be used to quickly make stripes with light and shade on the plate surface, which can be used as a bar statistical chart, thereby improving the production speed of the broken line statistical chart and the bar statistical chart of the analysis device, improving the charting efficiency of the analysis device, and being the same as other writing boards after the light is turned off, so that the analysis device is more suitable for ordinary classrooms and conference rooms.

Description

Technical Field

[0001] This invention relates to the field of demonstration and analysis devices, specifically a statistical chart analysis device. Background Technology

[0002] Statistical graphs are tools that use points, lines, surfaces, and volumes to draw geometric figures to represent the relationships between various quantities and their changes.

[0003] Currently, commonly used statistical chart analysis devices include multimedia, projectors, and whiteboards. However, multimedia and projectors require pre-made statistical charts before displaying them through PowerPoint. Therefore, this presentation method lacks the process of chart creation, resulting in monotonous and boring statistical chart analysis that fails to highlight key points or attract attention, thus affecting the effectiveness of data analysis and presentation. On the other hand, using a whiteboard to create statistical charts on the spot allows for personalized and diverse expression of statistical data, while enhancing people's intuitive understanding and participation in the data, and improving the visualization effect. However, when using a whiteboard to create bar charts and line charts on the spot, the need to determine appropriate distances for drawing to make the charts more vivid and clear leads to a slow production speed.

[0004] When using a writing tablet for statistical chart analysis, to ensure the speed of chart creation, most systems currently employ specialized chart creation devices for rapid chart production. During this process, the chart creation device is used to create the charts, while the writing tablet is used for textual analysis. Since statistical chart analysis often involves complex double bar charts and double line charts, and these charts are quite complex, the display surface of the chart creation device needs to be designed to be sufficiently large to ensure clear visualization. Furthermore, the complexity of the charts often results in extensive textual analysis; therefore, the writing tablet's display surface also needs to be large enough to accommodate all textual analysis content on a single page. Because statistical chart analysis requires the simultaneous use of a large writing tablet and chart creation device, it becomes inconvenient in space-constrained classrooms or conference rooms. Therefore, in space-constrained environments, the size of the writing tablet and chart creation device needs to be reduced, which will affect the display and analysis effectiveness of the charts.

[0005] Therefore, in order to quickly produce statistical charts in places with limited space, and to ensure the clarity of the statistical chart display and that all content in the text analysis can be displayed on the same page, a statistical chart analysis device is proposed. Summary of the Invention

[0006] The purpose of this invention is to provide a statistical chart analysis device that enables a writing tablet used for text analysis to also quickly create and display statistical charts, and the text analysis on the writing tablet and the display of the charts do not interfere with each other. This allows the statistical chart analysis device to achieve good statistical chart display and analysis results even when used in places with limited space.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A statistical chart analysis device includes a mounting frame with a panel and multiple mounting cavities. Multiple spotlights are bolted to the interior of each mounting cavity. The panel is made of a transparent material and bolted to the mounting frame. The panel is coated with a porous but opaque coating. Multiple light-shielding horizontal strips are provided on the inner side of the panel within each mounting cavity. The coating prevents light from penetrating the transparent panel while allowing light from the spotlights to pass through, thus displaying illumination stripes on the panel at the mounting cavity. An adjustment device is provided inside each mounting cavity to create alternating light and dark stripes on the illumination stripes. The panel needs to be written on; therefore, the panel material is a transparent, rigid material such as glass, acrylic plastic, PS plastic, or PC plastic. Acrylic plastic has high light transmittance, is lightweight, and inexpensive, making it the preferred material. The coating is a porous GORE-TEX coating or a white UV coating. This coating has a porous structure, thus possessing high light transmittance, and is opaque. Of course, other highly transparent and opaque coatings can also be used.

[0009] Because of the coating on the board surface, when not using bar charts, simply turn off the lights; the board is the same as any other writing board and can be used as such. When using bar charts, turn on the lights and activate the adjustment mechanism. The light will illuminate the board, creating alternating light and dark stripes that can be used as bar charts. To create line charts, simply connect the corresponding scales. This allows the board to be used for writing and statistical analysis without obstructing the view of the charts, making it easier for people to understand the meaning of the bar charts. The light-blocking component automatically prevents untreated light from shining directly into the eyes of people, thus avoiding discomfort during observation.

[0010] Preferably, the adjustment device includes multiple rotating shafts rotatably installed inside the mounting cavity, each rotating shaft having a light-shielding strip wound on it, and each rotating shaft having a corresponding guide shaft rotatably installed above the mounting frame. The movable end of each light-shielding strip is connected to at least one lead wire, which passes around the guide shaft and is connected to the rotating shaft at its other end. A drive assembly that can control the rotation of the rotating shaft from the outside of the plate is connected to the rotating shaft. The mounting frame is provided with a fitting device to block the gap between the light-shielding strips. The spotlight is an incandescent lamp, and the multiple light-shielding strips are made of filter films of different colors, with different opaque markings on the multiple light-shielding strips.

[0011] In use, the light-shielding strip is loosened by rotating the shaft clockwise through the drive component, and the lead wire is wound up. The light-shielding strip is then tightened through the lead wire. The light-shielding strip blocks part of the light, reducing the amount of light transmitted. With multiple light-shielding strips, multiple alternating light and dark stripes appear on the board surface at the mounting cavity. This can be used for simple bar chart analysis as well as more complex compound bar chart analysis. The chart is produced quickly. The multiple light-shielding horizontal stripes evenly distributed on the board surface can form multiple stripes after being illuminated, which can be used as scale lines, thereby improving the efficiency of bar chart production.

[0012] The drive assembly can use a worm gear drive, where a corresponding wheel is set on the mounting bracket, and a worm is connected to the wheel, causing the worm gear on the worm shaft to rotate, thus driving the shaft. Alternatively, the drive assembly can use a ball bearing head, where pulling the ropes on both sides drives the shaft. The worm gear drive wheel needs a larger diameter to facilitate the rotation of the worm, which occupies more space and increases the distance between the stripes. In contrast, using a ball bearing head to drive the shaft is convenient and occupies less space, so a ball bearing head is preferred for the drive assembly. Of course, in addition to these two methods, other drive assemblies can also be used, as long as the shaft can be rotated.

[0013] The light-shielding strip uses filter films of different colors. The filter films achieve different light transmittance by filtering light of different wavelengths. Therefore, the filter film with better light transmittance is preferred for the light-shielding strip. White light is preferred for the spotlight. When white light passes through the filter film, multiple stripes can appear in different colors, making the stripes in the same position more distinct and easier for people to observe. However, the use of filter films in the light-shielding strip will increase the cost of the analytical device. Due to the light irradiation inside the mounting cavity, a certain temperature will be generated. Therefore, a high-temperature resistant filter film is used.

[0014] When creating a compound bar chart, the stripes gradually darken from top to bottom. However, the same set of data may be located in different areas in different installation cavities. It is impossible to distinguish the same set of data by the different colored stripes alone. Therefore, different marks are set on the light-shielding strips. By using different marks, the different colored stripes can be distinguished as the stripes corresponding to the same set of data, eliminating the need for people to mark them again and making the creation of compound bar charts much simpler.

[0015] The logo can use Arabic numerals, letters, or Roman letters, or other markings, as long as the alternating light and dark stripes are clearly distinguishable.

[0016] Preferably, the total thickness of the light-shielding strip is 3.25 mm, and the illumination intensity of the spotlight is 212.1 Lux.

[0017] When the total thickness of the filter film is 3.25 mm and the light intensity is set at 212.1 Lux, people can clearly observe the stripes, with minimal stimulation to the human eye and the lowest light power.

[0018] Preferably, the bonding device includes two connecting strips symmetrically wound on a rotating shaft, the light-shielding strip is installed on the two connecting strips, each rotating shaft is provided with a corresponding limiting shaft below the mounting frame, the connecting strip passes around the limiting shaft, the minimum distance from the limiting shaft to the plate surface is equal to the minimum distance from the guide shaft to the plate surface, the horizontal distance between the multiple limiting shafts is less than the width of the connecting strip by 0.5-1mm, the thickness of the connecting strip is greater than the thickness of the light-shielding strip by 1-2mm, and the connecting strip protrudes to both sides of the light-shielding strip.

[0019] During use, if gaps exist between multiple light-shielding strips, light will enter between them through these gaps, resulting in indistinct brightness of the stripes displayed on the panel. To prevent light from entering between the light-shielding strips through these gaps, multiple limiting shafts are installed below the mounting bracket. The light-shielding strips extend upwards around these limiting shafts, ensuring that the strips always extend and retract on the same plane. This extension and retraction plane does not change with the rewind radius. Furthermore, the horizontal distance between the multiple limiting shafts is less than the width of the connecting strips, allowing the connecting strips on the light-shielding strips to fit together during extension and retraction, thus preventing gaps. When the light-shielding strips use a filter film, scratches on the filter film surface will reduce its filtering efficiency. To reduce the gap between the light-shielding strips, the gap is mainly eliminated by the bonding of the connecting strip. The thickness of the connecting strip is greater than that of the light-shielding strip, and the connecting strip protrudes to both sides of the light-shielding strip, thereby avoiding mutual friction between the light-shielding strips and improving their service life. The connecting strip is 1-2mm thicker than the light-shielding strip, allowing it to protrude 0.5-1mm. When wear-resistant leather and wear-resistant rubber rub against each other, the amount of wear per cycle is usually 0.0001-0.0005mm. Therefore, the connecting strip protruding 0.5-1mm from the light-shielding strip can withstand approximately 1000-10000 wear cycles, thus increasing the service life of the connecting strip and reducing the volume of the connecting strip after winding, thereby reducing the width of the analytical device.

[0020] In this invention, the connecting strips will rub against each other, so they need to have a certain degree of wear resistance and a small surface roughness to reduce the friction between the connecting strips and make the adjustment of the light-shielding strip more convenient. For this reason, the connecting strips are made of leather, but other wear-resistant materials with low roughness can also be used.

[0021] Preferably, the movable end of the light-shielding strip is connected to an opaque baffle. The baffle is made of metal, such as iron or copper sheet, and the surface of the baffle is frosted and coated with a black light-absorbing coating. Of course, the baffle can also be made of other materials, as long as it is opaque. The baffle is provided with a V-shaped protrusion, and the connecting strip is provided with a groove that matches the protrusion.

[0022] Due to the diffuse reflection of light, a gradual color change occurs at the intervals between the stripes, making the dividing line of the stripes indistinct. To address this, an opaque baffle is placed at the movable end of the light-blocking strip, thereby creating a clear dividing line at the intervals between the stripes, making it easier for people to observe.

[0023] The combination of the protrusion and the groove can prevent the connecting light-shielding strip from shifting due to the misalignment of the lead wire, and make the two sides of multiple light-shielding strips flush. This ensures that the connecting strip does not interfere with other light-shielding strips, making the stripes displayed on the panel more regular and more comfortable for people to observe. The protrusion is designed in a V shape, so even if one light-shielding strip is misaligned, the other light-shielding strips can be moved to the position that matches the groove through the V shape of the protrusion, thus ensuring that multiple light-shielding strips are flush.

[0024] Preferably, the rotating shaft is provided with a drum, the drum is connected to the rotating shaft through a one-way bearing, the light-shielding strip is wound onto the drum, the lead wire is wound onto the rotating shaft, and the one-way bearing and the rotating shaft undergo relative rotational displacement when the lead wire is wound.

[0025] During use, the lead wire, filter film, and connecting strip are all made of flexible materials. After multiple windings, they may stretch, causing the light-shielding strip to become loose and gaps to appear between multiple light-shielding strips, preventing them from fitting together. To address this, a drum is installed on the rotating shaft, and the drum is connected to the shaft via an electric bearing. The light-shielding strip is wound onto the drum, while the lead wire is wound onto the rotating shaft. When the light-shielding strip needs to be stretched, the drum does not rotate due to the action of the one-way bearing. At this time, the lead wire is wound freely. After the lead wire, filter film, and connecting strip are stretched, the individual winding of the lead wire will straighten the light-shielding strip. Then, the light-shielding strip wound on the drum is pulled out, thus preventing the light-shielding strip from becoming loose and unable to fit together. When winding the light-shielding strip, the one-way bearing will drive the drum to rotate. At this time, the light-shielding strip is winding up, and the lead wire is released, so it will not affect the winding of the light-shielding strip.

[0026] Preferably, the light-blocking assembly includes multiple light-blocking plates slidably mounted on the mounting frame. The maximum sliding height of the multiple light-blocking plates is the same, the maximum sliding displacement of the multiple light-blocking plates gradually decreases, and the difference in the maximum sliding displacement of two adjacent light-blocking plates is less than the height of the light-blocking plates. The light-blocking plates are provided with push plates extending above the multiple light-blocking strips. The light-blocking plates are provided with light-transmitting windows on one side of the light-blocking strips. The light-transmitting windows are made of opaque materials, such as frosted acrylic sheets or frosted glass, which only need to be able to display the scale strips and reduce the light intensity.

[0027] During use, to ensure sufficient adjustment area for the bar chart, a large illuminated area is also required. However, the unshielded areas, lacking proper light blocking, produce glaring white light when viewed, causing eye discomfort. To address this, multiple sliding light-shielding plates are mounted on the frame, each with a pusher extending above the light-shielding strips. When the light-shielding strips are pulled upwards, the highest strip pushes the light-shielding plate upwards. All light-shielding plates slide to the same maximum height, and their maximum sliding height is also the same. The gradually decreasing dynamic displacement allows the highest light-blocking strip to push multiple light-blocking plates upwards, ensuring that the multiple light-blocking plates completely block the unshielded areas. Furthermore, the difference in the maximum sliding displacement between two adjacent light-blocking plates is less than the height of the light-blocking plates, thus preventing light from passing through gaps between the light-blocking plates and causing alternating light and dark stripes in the light-blocking area, which would affect people's judgment. The setting of the light-transmitting window allows the scale lines to still be observed when only a line graph is made, facilitating the creation of the line graph. In addition, the light-transmitting window is semi-transparent to reduce the light intensity and improve people's comfort when observing.

[0028] The light-blocking component can also use roller blinds with good light-blocking properties to block the light from the unblocked parts, but roller blinds require people to manually adjust the height of the roller blinds, which is inconvenient during use.

[0029] Preferably, the light-shielding plate is located directly above the rotating shaft.

[0030] If the light shield is placed on both sides of the rotating shaft, the mounting bracket needs to reserve the installation position of the light shield, which increases the size of the entire analytical device, thereby increasing the material cost of the analytical device and occupying more space. Therefore, the light shield is placed directly above the rotating shaft, without occupying other extra space, so that the overall structure of the analytical device is more compact, smaller in size, and uses less material.

[0031] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0032] 1. By installing spotlights inside the writing board and light-shielding horizontal strips on the inner side of the board, uniform scale lines are displayed on the board surface, allowing users to quickly connect the scale lines to create line graphs. An adjustment device allows for varying degrees of light shielding from the spotlights, enabling the creation of alternating light and dark stripes on the writing board surface for use as bar graphs. This improves the speed of creating both line and bar graphs, allowing the device to simultaneously and quickly create and analyze both types of graphs without obstructing writing. The graphs on the board do not hinder writing, ensuring both the size of the text analysis display area and the size of the displayed graphs are adequate. This allows the device to provide good graph display and analysis even in spaces with limited space.

[0033] 2. By setting a filter film inside the adjustment device, the stripes on the plate surface are made to have different colors, making the statistical chart clearer and easier for people to observe. By setting a bonding device, multiple light-blocking strips are bonded together during the adjustment of the stripe height, avoiding light entering through the gaps between the light-blocking strips, which would cause the displayed bar chart to be unclear. This further improves the clarity of the graphic display produced by the analysis device, allowing people to better observe the statistical chart.

[0034] 3. By setting up a light-blocking component, the light at the highest point of the statistical chart can be automatically blocked according to the height of the statistical chart generated by the adjustment device, so as to avoid the glaring white light from affecting people's observation of the statistical chart. In addition, the light-blocking component is equipped with a light-transmitting window to filter the light intensity. When using the line chart alone, the light will pass through the light-transmitting window to display the scale lines on the board. People can still make line charts, and the light will not cause discomfort to people's eyes after being filtered by the light-transmitting window. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of the present invention when the spotlight is not turned on;

[0036] Figure 2 This is a partial structural cross-sectional view of the present invention when the spotlight is turned on;

[0037] Figure 3 This is a partial structural schematic diagram of the present invention;

[0038] Figure 4 For the present invention Figure 3 Sectional view at point AA;

[0039] Figure 5 For the present invention Figure 3 Enlarged view of section B in the middle.

[0040] In the diagram: 1. Mounting bracket; 11. Panel; 12. Mounting cavity; 2. Spotlight; 3. Adjustment device; 31. Rotating shaft; 32. Light-shielding strip; 33. Guide shaft; 34. Lead wire; 35. Drive assembly; 36. Mark; 4. Light-blocking assembly; 41. Light-shielding plate; 42. Push plate; 43. Light-transmitting window; 5. Fitting device; 51. Connecting strip; 511. Groove; 52. Limiting shaft; 53. Baffle; 531. Protrusion; 6. Roller; 7. One-way bearing; 8. Light-shielding crossbar. Detailed Implementation

[0041] like Figures 1 to 5 As shown, the details are as follows:

[0042] A statistical chart analysis device includes a mounting frame 1 with a panel 11 and multiple mounting cavities 12. Multiple spotlights 2, each using LED lights with a power of at least 2W, are bolted to the mounting cavities 12. The panel 11 is made of acrylic plastic and bolted to the mounting frame 1, and is coated with a white GORE-TEX coating. An adjustment device 3 is provided inside each mounting cavity 12 to produce alternating light and dark stripes. The adjustment device 3 includes multiple sets of rotating shafts 31 mounted below the mounting frame 1, each set containing three shafts. A roller 6 is mounted on each rotating shaft 31 and connected to the rotating shaft 31 via a one-way bearing 7. Two connecting strips 51 are symmetrically wound on the drum 6. When the shaft 31 is wound with the lead wire 34, the one-way bearing 7 and the shaft 31 rotate relative to each other. The connecting strips 51 are made of leather. The light-shielding strips 32 are glued to the two connecting strips 51. Each shaft 31 is located below the mounting bracket 1 and has a corresponding limiting shaft 52. The connecting strips 51 pass around the limiting shafts 52. The horizontal distance between the three limiting shafts 52 is less than the width of the connecting strips 51 by 1 mm. The thickness of the connecting strips 51 is greater than the thickness of the light-shielding strips 32 by 1 mm, and the connecting strips 51 protrude 0.5 mm to both sides of the light-shielding strips 32. The three light-shielding strips 32 are made of different filter films. The movable end of the light-shielding strips 32 is connected to an opaque material. Baffle 53 has a V-shaped protrusion 531, and connecting strip 51 has a groove 511 that mates with the protrusion 531. The protrusion 531 and the groove 511 mate to keep the two sides of the three light-shielding strips 32 inside the same mounting cavity 12 flush. Two lead wires 34 are symmetrically arranged on baffle 53. Each rotating shaft 31 is located above the mounting bracket 1 and has a corresponding guide shaft 33. The lead wires 34 pass around the guide shaft 33 and the other end is connected to the rotating shaft 31. A drive assembly 35 is connected to the rotating shaft 31 to control the rotation of the rotating shaft 31 from the outside of the plate surface 11. The drive assembly 35 is a beaded head connected to the rotating shaft 31. Each group of light-shielding strips 32 has different... The light-transmitting mark 36 is in uppercase English letters. The mounting frame 1 is equipped with a light-blocking component 4, which includes multiple light-blocking plates 41 that are slidably mounted on the mounting frame 1. The maximum sliding height of the multiple light-blocking plates 41 is the same, and the maximum sliding displacement of the multiple light-blocking plates 41 gradually decreases. The difference in the maximum sliding displacement of two adjacent light-blocking plates 41 is less than the height of the light-blocking plate 41. The light-blocking plate 41 is equipped with a push plate 42 that extends above the three light-blocking strips 32. The light-blocking plate 41 is equipped with a light-transmitting window 43 on one side of the light-blocking horizontal strip 8. The light-transmitting window 43 is made of semi-transparent frosted acrylic sheet, and the multiple light-blocking plates 41 are located directly above the rotating shaft 31.

[0043] University classrooms are typically 10-20 meters apart; therefore, the statistical charts need to be easily observable by people within 20 meters. A person with normal vision should be able to distinguish a distance of approximately 0.6 mm between adjacent stripes. Under standard lighting conditions, the stripe width should be approximately 2 lumens / m. 2To clearly distinguish stripes in the field of vision, sufficient brightness is required. For brightness contrast, a certain difference in brightness is needed to clearly distinguish stripes. Brightness contrast refers to the degree of difference in brightness between two areas. In this case, the brightness contrast should be greater than 10% to be easily distinguishable by the human eye. Therefore, the brightness difference of the intersecting stripes should be greater than 10%. The coating needs to be a high-transmittance and opaque coating; therefore, a titanium oxide nanoparticle coating can be selected, which has a light transmittance of over 80%. The spotlight illumination needs to penetrate the filter film and pass through the coating to produce 2 lumens / m² on the surface. 2 The brightness, therefore according to the formula:

[0044] I0 = (2 / T) (d / l)

[0045] In the formula, I0 is the initial light intensity, T is the coating transmittance, d is the coating thickness, and l is the distance between the coating and the filter film. The coating transmittance is 0.8, the coating thickness is 1 mm, and the distance between the coating and the filter film is 10 mm. Then:

[0046] I0 = (2 / 0.8) (0.001 / 0.01) ≈212.1 Lux

[0047] Therefore, the intensity of spotlight 2 should be approximately 212.1 Lux to produce sufficient light intensity to penetrate the coating, pass through the filter film, and reach an intensity of 2 Lux, according to the formula:

[0048] t = -(ln(I / I0)) / ln(T)

[0049] Therefore, the thickness of the filter film:

[0050] t=-(ln(2 / 212.1)) / ln(0.7)≈3.25mm

[0051] Therefore, the total thickness of the three filter films is 3.25mm. The brightness of adjacent stripes needs to differ by 10% or more. According to the formula, the thickness of adjacent light-shielding strips 32 should differ by at least 0.2mm. Therefore, the thickness of the filter films can be designed according to the number of stripes. For this reason, when the light from spotlight 2 needs to penetrate the filter film and coating, the light intensity of spotlight 2 needs to be at least 212.1 Lux, and the total thickness of the filter film is 3.25mm. When the light intensity is set at 212.1 Lux and the total thickness of the filter film is set at 3.25mm, people can clearly observe the stripes, and the stimulation to the human eye is minimal, and the power of the light is the lowest.

[0052] When there is no need to create statistical charts, turn off the lights. At this time, the white surface is opaque and white, and the analysis device can be used as a normal writing board.

[0053] When plotting the broken line graph, the lights are turned on, and the light-shielding strip 32 is in a rolled-up state. The light-shielding plate 41 filters some of the light through the light-transmitting window 43, and the light-shielding strip can be displayed on the plate surface 11 under the illumination of the light, forming multiple uniform scale lines. People can then connect the corresponding scale lines on the plate surface 11 to draw the broken line graph. Moreover, the light intensity is reduced after being filtered, and people can no longer see the plate surface 11 in a glaring way.

[0054] When creating a single-bar chart, pull the corresponding beaded heads on different mounting cavities 12 to rotate the shaft 31 clockwise, causing the light-shielding strip 32 to extend on the plate surface 11 and align the baffle 53 with the corresponding scale line. At this time, multiple dark stripes will be generated on the plate surface 11, and the single-bar chart can be completed and the chart analysis can begin. When it is necessary to adjust the strip height, pull the beaded heads to rotate the shaft 31 counterclockwise, which will retract the light-shielding strip 32 and reduce the height of the stripes. When the light-shielding strip 32 is pulled, it will push the light-shielding plate 41 to move upward, thereby blocking the part above the light-shielding strip 32 and preventing the light from shining into people's eyes.

[0055] When analyzing a compound bar chart, pull the other beaded heads to cover the original light-shielding strip 32 with other light-shielding strips 32, thereby creating multiple groups of stripes of different colors on the panel 11. The markings 36 on the light-shielding strips 32 correspond to the corresponding groups, that is, the first group corresponds to the stripe at point A, the second group corresponds to the stripe at point B, etc., so that the stripes of different groups can be easily distinguished, thus completing the production of the compound bar chart.

[0056] When creating a bar chart, the scale lines are always displayed on panel 11. Line charts can also be created at this time, and annotations can still be written on panel 11.

[0057] When the chart is not needed, simply turn off the lights, and the bar chart can still be saved for the next lesson.

[0058] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A statistical chart analysis device, characterized in that, The system includes a mounting frame (1) and multiple mounting cavities (12) evenly distributed on the mounting frame (1). The mounting frame (1) has a plate (11) covering the multiple mounting cavities (12). The mounting frame (1) has multiple spotlights (2) located inside the mounting cavities (12). The light from the spotlights (2) shines onto the plate (11). The plate (11) is made of transparent material and is coated with a porous but opaque coating. The plate (11) has multiple light-shielding horizontal strips (8) located inside the mounting cavities (12). The coating is used to prevent the panel (11) from being transparent and the light from the spotlight (2) from penetrating the coating well. Each of the mounting cavities (12) is provided with an adjustment device (3). The adjustment device (3) is used to perform different light-blocking treatments on the light irradiated onto the panel (11) so that the panel (11) presents alternating light and dark stripes. The mounting bracket (1) is located inside the mounting cavity (12) and is provided with a light-blocking component (4). The light-blocking component (4) can follow the height of the stripes and automatically block the light that has not been shielded by the adjustment device (3). The adjustment device (3) includes multiple rotating shafts (31) rotatably installed inside the mounting cavity (12). Each rotating shaft (31) has a light-shielding strip (32) wound on it. Each rotating shaft (31) is provided with a corresponding guide shaft (33) above the mounting frame (1). The movable end of the light-shielding strip (32) is connected to at least one lead wire (34). The lead wire (34) passes around the guide shaft (33) and the other end is connected to the rotating shaft (31). The rotating shaft (31) is connected to a drive assembly (35) that can control the rotation of the rotating shaft (31) from the outside of the plate surface (11). The mounting frame (1) is provided with a fitting device to block the gap between the light-shielding strips (32). The spotlight (2) is an incandescent lamp. The multiple light-shielding strips (32) are made of filter films of different colors. The multiple light-shielding strips (32) are provided with different opaque markings (36). The bonding device includes two connecting strips (51) symmetrically wound on the rotating shaft (31). The light-shielding strip (32) is installed on the two connecting strips (51). Each rotating shaft (31) is provided with a corresponding limiting shaft (52) below the mounting frame (1). The connecting strip (51) passes around the limiting shaft (52). The minimum distance from the limiting shaft (52) to the plate surface (11) is equal to the minimum distance from the guide shaft (33) to the plate surface (11). The horizontal distance between the multiple limiting shafts (52) is 0.5-1mm smaller than the width of the connecting strip (51). The thickness of the connecting strip (51) is 1-2mm greater than the thickness of the light-shielding strip (32). The connecting strip (51) protrudes to both sides of the light-shielding strip (32). A drum (6) is provided on the rotating shaft (31). The drum (6) is connected to the rotating shaft (31) through a one-way bearing (7). The light-shielding strip (32) is wound onto the drum (6). The lead wire (34) is wound onto the rotating shaft (31). When the rotating shaft (31) is winding the lead wire (34), the one-way bearing (7) and the rotating shaft (31) undergo relative rotational displacement. The light-blocking assembly (4) includes multiple light-blocking plates (41) slidably mounted on the mounting bracket (1). The maximum sliding height of the multiple light-blocking plates (41) is the same, and the maximum sliding displacement of the multiple light-blocking plates (41) gradually decreases. The difference in the maximum sliding displacement of two adjacent light-blocking plates (41) is less than the height of the light-blocking plate (41). Below the light-blocking plate (41) with the largest moving distance, there is a push plate (42) extending above the multiple light-blocking strips (32), and the other light-blocking plates (41) are located directly above the push plate (42). The light-blocking plate (41) has a light-transmitting window (43) on one side of the light-blocking horizontal strip (8). The light-transmitting window (43) is made of a semi-transparent material. The light-blocking strips (32) An opaque baffle (53) is connected to the movable end. The lead wire (34) is connected to the baffle (53). A V-shaped protrusion (531) is provided on the baffle (53). A groove (511) is provided on the connecting strip (51) to cooperate with the protrusion (531). The cooperation between the protrusion (531) and the groove (511) can keep the two sides of multiple light-shielding strips (32) inside the same mounting cavity (12) flush. The light-shielding plate (41) is located directly above the rotating shaft (31). The lead wire (34) is symmetrically arranged on both sides of the light-shielding strip (32). The total thickness of the light-shielding strip (32) is 3.25 mm, and the light intensity of the spotlight (2) is 212.1 Lux.

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