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how to make speedometer picture
The instrument panel chart, which is a chart modeled after the automobile speedometer, is often used to reflect the completion rate, income growth rate and other indicators. It is simple and intuitive, and is one of the most common graphics in business reports. The operation of making instrument diagram is also very simple
Project completion rate: the actual completion rate of the project to be made. Auxiliary data of completion rate: it is equal to project completion rate minus instrument pointer data. Instrument pointer data: we set it to 0.01 (fixed), and use a relatively small data as the instrument pointer occupation data: his formula is 1.6/270 * 360-C2. The dashboard is generally 270 degrees, and the maximum value of our instrument material is 160. First, we reduce 160 by 100 times to get 1.6. Then we divide 1.6 evenly on the dashboard by 1.6/270. Then we multiply the result by 360 and subtract the completion rate. Then we can get the position of the pointer. Select the completion rate auxiliary data, instrument pointer, and occupancy data, and then click Insert to find the pie chart. Click this pie chart and press Ctrl+1 to set the starting angle of its first sector to 225 degrees. Then set the completion rate auxiliary data and the corresponding sector color of the occupancy data to no fill, and the contour to no contour, In this way, only the very small sector of the instrument pointer data is left in our chart
Then we click the instrument pointer data in the legend, and then click the format to select a color we like in the shape filling, and then set its shape contour to no contour, and then we delete the useless legend in the table, only the pointer is left. Next, we first select the instrument panel material, then press and hold the Ctrl key to select the pointer, and then click the format to set its width and height to 10cm, and then click to align, First select horizontal center, then select vertical center, and then click combination. Then a simple dashboard chart is completed.PS:Do not use the radius of the tire as the radius of the wheel 1 inch=0.0254 meters, Wheel diameter=205x55% x2+16x25.4=631.9 mm. Wheel radius r=315.95 mm=0.32 m. At this time, you only need to know the relationship between the speed and them ua=0.377rn/ig.i0. If you have studied the theory of automobile, you should remember. All the data are clear. You can calculate directly. Let's calculate the speed of gear 1 when n=1000r/min. ua=0.377x1000x0.32/3.8x4.4=7.2（km/h）
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