IEEE Circuits and Systems Magazine - Q3 2021 - 83

perceived by the computer
to avoid view blocked.
■ Physical Screen: 4K Display
for the specially-design -
ed UI guides the user to steer
and call.
VI. Preparation Before Mass
Production
For mass production, clinical trials
and cost valuation were conducted.
Relative experiments on
quadriplegia patients have been
designed to warrant the wheelchair
in the Neurology Department
& Rehabilitation Center of the
First People's Hospital of Shaoyang
City, Hunan Province, China.
The experiments have verified
the functionalities of the designed
wheelchair, though further improvements
are required.
Production cost is another critical
issue if the wheelchair will go
to mass production. The detailed
breakdown of the cost is listed in
Table I for the demo version. The
table shows that, the total cost of
our wheelchair is $689.24, which
is far less than the nursing cost.
For mass production,
further reduction
of the cost is expected.
VII. Conclusion
Our team designs a PCCR based automatic wheelchair.
As a pioneer in the field of visual control, we explore
the possibility of combining visual recognition with
intelligent devices for the disabled. With the easy-tooperate
wheelchair, the patient can move freely within
a specific range, which greatly relieves the pressure
of nursing and finance in the rehabilitation of the disabled.
According to the concept of demand determines
function, the specific design ensures patients' safety.
Effectiveness and low cost proved by clinical trials
constitutes a market competitiveness. Further works
will be directed towards the improvement of the wheelchair,
the reduction of the production cost, and the
real-life applications.
Acknowledgment
This work was supported in part by NSFC under Grant
61871115, in part by the Jiangsu Provincial NSF for Excellent
Young Scholars under Grant BK20180059, in
THIRD QUARTER 2021
Table I.
Cost & Power Consumption.
Device
Microcomputer
Eye Tracker
Screen
Wi-Fi CPE
Gyroscope
Transformers
Total:
Cost/$
385.71
185.89
64.28
38.43
9.29
5.64
689.24
PC
Communication
Wi-Fi
Environment
Skype
Phone
Power Management
24 V 20 AH
Lithium-Battery
3.3 V
STM32 PCB
24 V
Control
Software:
Input:
Output:
Logic Tobii Eyetrackers
SDK
Gyro
Display
Hardware:
Motor Screen Driver
19 V
12 V
PC
Steer Emergency
Call
Figure 6. Schematic diagram of wheelchair function.
Power/W
61.50
3.00
<10
2.40
0.01
0.38 +
. 75
part by the Six Talent Peak Program of Jiangsu Province
under Grant 2018-DZXX-001, in part by the Distinguished
Perfection Professorship of Southeast University,
in part by the Fundamental Research Funds for
the Central Universities, and in part by the SRTP of
Southeast University.
IEEE CIRCUITS AND SYSTEMS MAGAZINE
83

IEEE Circuits and Systems Magazine - Q3 2021

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