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Commonly used are conventional LED display screen, and the arc screen is used less, and the arc screen to know the arc length, string length, string high can be used to calculate the area of steel structure, arc screen, and so on. The LED display manufacturer details the calculation method of the arc screen for you.

1. amount of string long string high arc length

The general arc length is difficult to measure and the size difference is large, so the arc length and radius are calculated according to the chord chord length and checked. The difference can be within the range of 10cm. If the difference is larger, please measure and calculate again and again.

Measuring method of 2. chord high string length

The distance between the two endpoints of the arc is a string length, the middle point of the chord length and the middle point of the arc line are string height (or: the length of the chord length of the chord line to the arc line is high), and the length of the chord length of the arc screen is long.

3. method of calculating arc length and radius according to string high string length

Computational Thinking: the root formula calculates the angle between the chord height and the chord length to form a right triangle. Example:

(1) the chord length is B and the chord length is 2A. 2a=200 b=60 is used to calculate the arc length and radius.

2. The chord length and the chord length constitute the triangle side length, that is the calculation method of a=100 b=60 chord high chord length.

3. The chords and chords long form the triangle side length, that is a=100 b=60. According to Pythagorean theorem, the formula of C side length Pythagorean theorem is calculated: a square +b square =c Square: c=116.62.

Then according to the trigonometric function formula sin A=a/c (A as the diagonal of a), the calculation method of A=59.32 degree chord high angle of A=59.32 degree is calculated by the inverse sinusoidal function of sin A=0.86 reoccupy the calculator

(5) extend the B edge to the center of the circle, and connect the B vertex to the center of the circle. That is, the isosceles triangle is formed. According to the triangle inner angle and 180 degree, the isosceles triangle C=62 is calculated, and the method of calculating the radian of the arc screen is 124 degree radians.

Then, according to the formula of sin C=c/ C=c/, the method of calculating the oblique side length of the sin62=100/ oblique side with the calculator sin62 0.883 or the length of the beveled edge is 113.3 R=113.3.

The circumference of the arc is the length of the circumference of =2 PI R=2*3.14*113.3 =711.52 circumference, /360, the value of each angle of the circle is 1.98 arc length = 1.98* billboard radian 124 degree =245.52 per degree value.

Finally, we get the arc length: 245.52 radian: 124 degree radius: 113.3 arc screen calculation method.

4. compare the calculated arc length with the actual measured arc length.

The difference can be within the range of 250px. If the difference is bigger, please measure and calculate repeatedly.