TouchMagix : Motion Sensor

The IR motion sensor is an important and integral part of 'Interactive Floor' product offered by TouchMagix. The product was designed to have a distinct identity and company's brand image. It was a product centric project with inside-out approach. The product is currently being manufactured.  IR_Page top Project Details Team: Manas Karambelkar, Ganesh Vishwanathan Duration: 4 weeks Client : TouchMagix Freelance work done through Fervor electronics Pvt Ltd Description TouchMagix had developed a hardware software package called MotionMagix Interactive Floor. The package is used for gaming or for promotional purposes where a floor projection is made interactive by an Infra-Red motion sensor. The system was based on standard projectors and PC making it easy to adopt.  But IR motion sensor was the component that could use some identity and branding bringing forth the client.
An illustrator displaying the 'IR zone' which is the active area of the interactive projection

An illustrator displaying the 'IR zone' which is the active area of the interactive projection

 
Kids and youngsters enjoying interactive games on the system

Kids and youngsters enjoying interactive games on the system

As all the electronics and software was already developed the project was carried out in an inside-out approach giving a body to this fantastic technology. Initially various forms were explored through sketches. Considering that the product is used for gaming/promotion it was styled in a trendy way but still retained sophistication.
One of the initial sketches during form exploration

One of the initial sketches during form exploration

There were few features to be included such as mounting facility on the ceiling, a stand which can keep the product upright during demonstration, larger spread of the IR zone without increasing the size of the product. The emitted rays should not interfere directly with the bounced back rays received by the IR camera. Lot of iterations and detailing was done in 3D models.
One of the initial 3D model for figuring volume requirement

One of the initial 3D model for figuring volume requirement

Another challenge was of manufacturing and materials. Since the product was to be produced in smaller batches and quantities, plastic molding was not a feasible option. Decision was taken to make it in sheet metal where tooling and material cost will be cheaper and small batches were practically possible. The final prototype was made in brass sheet using turning process. Internal details for mountings were also done using sheet bending. The convex surfaces for IR LEDs were vacuum formed in milky white acrylic and the transparent lens by vacuum formed acrylic with details for mounting IR filters.
Prototyping in brass. From top left to bottom right : 1) Mold making in wood on lathe 2) Sheet cutting 3) Spinning of parts 4) Powder coating 5) Assembly 6) Working prototype

Prototyping in brass. From top left to bottom right : 1) Mold making in wood on lathe 2) Sheet cutting 3) Spinning of parts 4) Powder coating 5) Assembly 6) Working prototype

Features of the final products : The product is dome shaped and has hooded vents for heat dissipation. These are styled to look funky. The IR LEDs are mounted on a convex surface to give greater coverage on the floor without increasing the size of the product.  A kick stand was provided for placing the product on a horizontal surface for demonstration. The finishing was done by powder glossy black coating to make it look like plastic with pink accents for the front rim and the stand. The colour combination is representative of the colour scheme of TouchMagix.
Front and side views with outer dimensions

Front and side views with outer dimensions

 
A see through render of the IR Motion Sensor where the assembly of components could be seen

A see through render of the IR Motion Sensor where the assembly of components could be seen

 
Exploded view of the IR Motion Sensor where all parts are seen along with the assembly

Exploded view of the IR Motion Sensor where all parts are seen along with the assembly

         


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