REGLAS PARA EL DISEÑO DE ARCHIVOS Y GRUPOS DE ARCHIVOS

Global dimensions 120 x 80 x 25 mm

Inputs 1x Electrical power (USB micro)

Output 1x USB (1 A)

1x USB (2.1 A)

Capaciteit 11000 mAh

Figure 2.10 | A-Solar Xtorm AL360 Power Bank

2.3.2 FUNCTION OVERVIEW

The casing has a certain amount of functions it has to fulfil. All these functions are extracted

from the research that has been done in chapter 1 and 2. The functions are listed below:

◊ The casing controls the display of the HMD

◊ The casing controls the audio of the HMD

◊ The casing communicates with the tracker on the HMD

◊ The casing supplies power to all electronic components

◊ The casing runs the software necessary to play the game

◊ The casing stores the HMD, cables and clicker.

◊ The casing is portable

◊ The tablet can be docked in the casing

◊ The casing can be placed on a surface and/or can be hung onto the bed

2.3.3 USER-PRODUCT INTERACTIONS WITH CONTROLLER

The practitioner has a certain interaction with the controller. From the scenario of paragraph

2.2.1 a list of interactions can be identified (see table 2.8). A short description is given of the

interaction in chronological order therefore the scenario is used as guidance.

First the VR system needs to be transported to the treatment room. Therefore the practitioner needs to be able to carry the controller, containing the HMD. The total VR system cannot be too heavy and needs to be easy to grasp.

Then the practitioner needs to place/hang the prototype somewhere in the treatment room. It must be immediately clear how the controller can be placed. The feeling of this placement is also important, the practitioner must immediately feel that the controller stand or hangs stable.

Next up is the connecting of the cables en preparing the VR system to use during the

treatment. All cables (one or two) need to be connected. The connector should fit very easily

and the cables should have enough length to reach form the controller to the HMD.

When everything is set up, the practitioner helps the patient with putting on the HMD. The

HMD as well as the cables are stored in the controller. It must be very easy to get the cables and HMD in and out of the controller. The last thing that needs to be done is giving the patient the clicker, which is used for interacting with the game. After the patient is ready to play the VR game the practitioner needs to start the game. By pushing a button (or maybe two: one for the controller and one for the HMD) the VR system is started.

The start-up time of the total system needs to be as short as possible in order to continue with the treatment right away. During the treatment the practitioner must be able to look on the tablet of the controller. Here he can see the image that the patient can see on the HMD. Also the practitioner can change some of the game settings on this tablet. So he needs be able to reach and see the tablet that is connected op de tablet.

Table 2.8 | Overview of user-product interactions and requirements

User-product interaction Requirements and whishes for controller Transport of VR system ◊ not too heavy

◊ easy to grasp

◊ requires only one hand to carry Setting up the VR system ◊ intuitive placement of controller

◊ evoking the feeling of reliability (e.g. stability when standing or hanging Unpacking or packing VR system ◊ easy access to cables and HMD

◊ evoking the feeling of reliability

Connecting cables ◊ evoking the feeling of reliability (e.g. cables are securely connected and cannot fall out)

◊ cables are long enough

◊ clarification of how the cables can fit in the sockets Place the HMD on patient Not applicable

Handing the clicker to patient Not applicable

Starting and turning off VR system ◊ as little action required as possible Interacting with tablet ◊ easy access to tablet

◊ good viewing angle

Cleaning of controller and clicker ◊ no edges where filth can pile up

◊ material is suited for cleaning

After the treatment is done, the system can be turned off and the HMD can be removed from

the head of the patient. The cables can be disconnected and after the HMD has been cleaned it can placed back in the controller together with the cables. The controller and clicker also needs to be cleaned. The clicker can be stored in the controller and after that the VR system is ready to be transported.

2.3.4 CONCLUSION OF ANALYSIS OF THE NEW PRODUCT

All the parts that will be in de casing are defined and specifications and dimensions are known.

All connections between these components are mapped in order to fully understand the operations of the product. The connections between the components can be of importance in the placing of the components in the casing.

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2.4 REQUIREMENTS AND WISHES

2.4.1 LIST OF ALL REQUIREMENTS AND WISHES

Requirement

After all research that was done in preparation of this assignment a list was made that listed

all requirements and wishes for the controller. The list is separated in different sections, each

section consists of another category. The requirements are ranked according to their level of importance on a scale from 1 to 5 where 1 stands for least important and 5 stands for most important. This scale is added so the concepts that are generated could be ranked more precisely.

Table 2.9 | Overview of requirements with importance ranking

REQUIREMENTS IMPORTANCE

Aesthetics

The controller must connect with the corporate identity of Cinoptics 4 The controller contains a simplistic design with minimal distracting features 4 The controller must connect with the appearance of modern medical equipment 3 The controller must evoke the feeling of a sterile environment to the patient 3 Geometry

The controller may not block the view of the medical practitioner 5 The controller may not block the proceedings of the medical practitioner 5 The controller is suitable for transport by hand by one person 4

The controller can be transported through the hospital 5

Performance

The VR system can run for 30 minutes on one battery 3

The controller weighs less than 1 kilograms (without peripherals) 3

The controller can store the HMD and the connector cable 2

The controller can dock the tablet that is used to control the game 5

The controller supplies power for the HMD and the tablet 5

The controller can be carried using one hand 2

The VR system can be set up in 5 minutes 4

Physical

The material of the controller is resistant to 70% ethanol an chlorine 5 The controller does not have small grooves or other small spaces where filth can add up 4 The controller can be easily cleaned by medical personnel 4

The casing of the controller may not be warmer than 50 °C 4

The controller prevents all electronic components from overheating 4 The controller can contain all electronic components and keeps them in place 5 The operator can move the tablet towards or away from himself 2 The use of the controller doesn’t require any changes to the treatment room in UZ Leuven 4

Wishes

Also a list of wishes is created. Here product demands that are not of vital importance to the success of the product. Therefore these wishes have an importance of 1 on the importance- scale.

Table 2.10 | Overview of wishes with importance ranking

WISHES IMPORTANCE

The controller can also be used in UZ Gent and the Martini Hospital 1 The controller can be used in the wet environment of the wet treatment room of UZ Leuven 1 The operator can communicate with the patient through the controller 1 Filth should be visible on the surface of the chosen material 1

2.4.2 PRODUCT DESCRIPTION; STARTING POINT FOR THE NEW DESIGN

In order to have a good starting point for the idea phase a global product description is made with some design conditions.

The medical practitioners are the most important user group of the new casing and the design of the new product should ensure that as many of their requirements as possible are met. The three most important requirements are:

1. The product should be more time efficient. Currently the product takes too long to

transport and takes too much time to set up.

2. The medical practitioners should be able to view at the screen that shows the images that the patient is seeing at that exact moment. They need to know if the VR system works as desired and if the patient actually experiences immersion.

3. The product should be very easy to clean and disinfected if necessary.

Furthermore the product creates a feeling of unity. The medical practitioners will no longer

see six or seven different hardware components that together form the VR system. There will

be only the HMD, the casing and the cable that connect these two products. The casing should therefore aim for a simplistic and intuitive design.

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