Shanghai Inertia

The Seven Bridges Problem — Frontier Technology exhibit for science museums

Reference image

Category	Frontier Technology
Standard size	Custom size
Supply	Single unit or batch · OEM to your drawing
Lead time	Standard 4–8 weeks after deposit (confirmed per contract)
Warranty	1 year, structure and control
Documents	Specification sheet · control diagram · spare-part list

A standard catalogue model: the dimensions, control package and finish are fixed, which is what keeps the price and the lead time predictable. Size, colour and interface language can be adapted without a new design cycle.

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01 / Overview

The exhibit consists of a stylish booth, a 55 inch LCD TV, and a seven bridge game interactive panel. Viewers can move the magnetic slider (character model) on the Seven Bridges game board. When the magnetic slider attracts the magnetic block inside the game board to move and pass over a bridge, the lights next to the bridge will automatically light up, indicating that the bridge has been crossed. Viewers can repeatedly try to solve the Seven Bridges problem and experience the process of solving path difficulties. At the same time, visitors can also learn how the famous mathematician Euler used mathematical thinking to solve this problem and its profound impact on graph theory in the field of mathematics by watching the content of the graphic board.

02 / How visitors use it

The unit is designed for unsupervised public use: controls are recessed or shielded, moving parts are enclosed, and the interface is operable by a child of about six with no instruction. Where a screen is used, the language can be switched without changing the hardware, and the content can be replaced on site.

03 / The science behind it

The K ö nigsberg Seven Bridges Problem is a famous graph theory problem based on a real-life example: at that time, a river passed through the city of K ö nigsberg, East Prussia (now Kaliningrad, Russia), with two small islands in the center of the river connected by seven bridges on both sides of the river. How can we walk all seven bridges at once, given that all bridges can only be walked once? two This problem was proved unsolvable by Leonhard Euler in 1736, who abstracted it as a geometric figure, with each piece of land viewed as a point and each bridge as an edge. He found that there were four odd vertices (points with an odd number of edges connected to them) in this shape, and in order to draw this shape with one stroke, the number of odd vertices must be either 0 or 2. three Euler's proof opened up a new branch of mathematics - graph theory. Use points to represent things, and use edges connecting points to represent the connections between things.

04 / Built for a public floor

Every unit leaves the factory after a running test: mechanisms cycled, electronics burned in, edges dressed, fixings torqued and marked. Wear parts — bearings, sliders, lamps, belts, touch panels — are modular and listed on the spare-part sheet, so a venue technician can replace them without returning the exhibit. Crating is plywood with foam blocking; the loading plan and packing list travel with the shipment.