Intermediate Project - Embedded RoboticsFinal Report
Embedded system for an intelligent desk
Autor: Tomasz Dłubis ∗,Class: Intermediate Project
Instructor: Mr Witold Paluszyński†, Ph.D.
January 23, 2018
This work is licensed under a Creative Commons “Attribution-NonCommercial-NoDerivs 3.0 Unported” license.
Abstract
This report shows results of building and programming lighting part of system for an intelligentdesk. Lighting in workspace, both for precise work as well as rest, are specified in standard ISOPN-EN 12464-1:2012(E). Described controller is following this standard and is mounted on a deskin constructor’s dormitory. The lighting is automatically switched on/off.
∗Wydział Elektroniki, Politechnika Wrocławska, ul. Z. Janiszewskiego 11/17, 50-372 Wrocław†Wydział Elektroniki, Politechnika Wrocławska, ul. Z. Janiszewskiego 11/17, 50-372 Wrocław
1 IntroductionThe aim of the project was to crate embedded system which controls light both above desk and in
the whole room. It should be integrated with another system which should be responsible to control acooler for laptop based on a Peltire cell. Systems were constructed on the desk in author’s dormitory.
2 Description of the projectThe lighting system fulfills following criteria:
• Light intensity above the desk can be approximately equal:
– 200 lx - for normal normal use (non-working mode),
– 500 lx - for normal work (work mode),
– 1000 lx - for precision work like soldering (soldering mode)? .
• light intensity in a room should be approximately equal 200 lx all day (except at night when allresidents are sleeping)? ,
• covering one of the light sensors does not change lighting,
• light changes are logarithmic (visible change is linear),
• lighting switches to working mode when increased activity is detected,
• after 10 min of inactivity at the desk, desk lighting is switched off,
• control of light intensity over the desk is possible to switch off/on,
• actual light intensity measurements are displayed on LCD-display,
• user is able to change mode of lighting,
• system is deactivates non-working mode when computer is connected via USB.
2.1 Description of used hardware
Powering
The execution system is powered by ATX power supply and controll system is powered by USBdocking station.
Controller
Controler uses MKL26Z128VLH4? microcontroller (Cortex-M0+) which is installed on developmentboard FRDM-KL26Z? .
Sensors
Project consists four light sensors. First one is analog sensor ALS-PT19-315C. The rest of them areBH1750? . Two of these are mounted on the desk and the last one with analog sensor is mounted instrategically designated place in the room (see figure 1).
Actuator
One meter of white LED tape and one bulb was used as actuator. Control of light in a room issimulated because system is installed in dormitory where electrical installation cannot be changed.
1
(a) Over the desk
(b) In the room
Figure 1: Places where light sensors are installed
2
Executive system
To execute control of the system was designed and created PCB shown on appendix A and B. Thesystem is designed to be resistant to interference actuator? ?
3 ResultsMain goal of the project was accomplished. The embedded system to control lighting on the desk
and in the room was created. The USB connection works only when system is connected directly to thecomputer. When system is connected via docking station used algorithm does not work. It is detectingconstant connection to docking station. There is a need, however, to write a specialized driver in orderto detect a computer connected to the docking station.
3
Spic
eOrd
er 1
Spic
eOrd
er 2
SpiceOrder 1SpiceOrder 2
ZasilaniaPrzetworniceFiltracja napięcia wejściowego
Zasilanie 5V
Zworki
Zasilanie 3.3V
+5V
GND
100n
2k2
47u
+12
V
+12
V
GND
47u 100n
GND GND
47u100n
GND
2k2
5k
LM317T 2k2
47u
47u100n
+5V
+3V
3
CG
RM
4007
-GCGRM4007-G
47u100n
C3 R13
LED
1
C4
JP1
123
C5 C6
Z1
C7C8
LED
2
R14
13
2
R15
IC1ADJ
IN OUT
R16
C9
C10C11
D1
D2
C12C13
Z4
JP14
P$1P$2
Układyzasilania
Tomasz DłubisIntermediate Project
Sheet:
A
B
C
D
E
F
1 2 3 4
A
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1 2 3 4
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A Electronic diagram of executive system
4
Wentylatory
Ogniwo Peltiera
LED Układy wykonawcze
Sterowanie Żarówkami
100k
1k5 IRLML6344
GND
IRLML5203
3k9
+12
V
100k
1k5 IRLML6344
GND
IRFU5305
3k9100k
1k5 IRLML6344
GND
IRLML5203
3k9
+12
V
MOC3041T
2k2
100k
1k5 IRLML6344
GND
360
330
BT138-V
VCC
100n
Żarówka pokój
MOC3041T
2k2
100k
1k5 IRLML6344
GND
360
340
BT138-V
VCC
100n
Żarówka Biurko
+3V
3
+3V
3
Ziemia i Zero
Wyjścia zer Żarówek
PE
+12
V
100n
R17
R18
Q3
1
23
Q4
R19
JP412
R20
R21
Q5
1
23
Q6
R22
JP512
R23
R24
Q7
1
23
Q8
R25
OK31
2 4
6
R26
R27
R28
Q9
1
23
R29
R30
R31T3
C14
X4-1
X4-2
OK41
2 4
6
R32
R33
R34
Q10
1
23
R35
R36
R37T4
C15
X5-1
X5-2
X1-1
X1-2
X6-1
X6-2
JP1012
C1C2
JP1312
STER_WENT/3.1C
STER_PELTIER/3.1C
STER_LED/3.1C
STER_BIURKO_ZAR/3.1C
STER_POKOJ_ZAR/3.1C
Układywykonawcze
Tomasz DłubisIntermediate Project
Sheet:
A
B
C
D
E
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1 2 3 4
A
B
C
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1 2 3 4
2/3
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5
LCD BH1750_Biurko Temperatura_Peltierciepła strona
Temperatura_Peltierzimna strona
Wejście sterownika Wyjście przyciski
BH1750 pokój
Wejście czujnika ruchu
5k
100k
1k5 IRLML6344
GND
+3V
3
+5V
+3V
3
GND
100k
+3V
3
GND
GND+
3V3
GND
+3V
3
GND
GND
3k9
3k9
3k9
+3V
3
3k9
GND
+5V
13
2R1
R2
R3
Q1
1
23
JP7123456789
101112
JP812345R4
JP91234
JP121 23 45 67 89 10
11 1213 1415 1617 1819 2021 22
JP31234
JP61234
JP212345
R5
R6
R7
R8
JP11123
LCD_WŁ/WYŁ
LCD_WŁ/WYŁ
LCD_E
LCD_E
LCD_
LCD_
LCD_D1
LCD_D1
LCD_D2
LCD_D2
LCD_D3
LCD_D3
LCD_D4
LCD_D4
I2C1_SDA
I2C1_SDA
I2C1_CLK
I2C1_CLK
I2C0_SDA
I2C0_SDA
I2C0_SDA
I2C0_SDA
I2C0_CLK
I2C0_CLK
I2C0_CLK
I2C0_CLK
STER_POKOJ_ZAR/2.1CSTER_PELTIER/2.3E
PRZYC_2
PRZYC_2
PRZYC_1
PRZYC_1
PRZYC_3
PRZYC_3
PRZYC_4
PRZYC_4PIR
PIR
STER_BIURKO_ZAR/2.1B
STER_LED/2.1DSTER_WENT/2.1F
Wyjścia/WejściaTomasz DłubisIntermediate Project
Sheet:
A
B
C
D
E
F
1 2 3 4
A
B
C
D
E
F
1 2 3 4
3/3
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LM317T
MOC3041T
MOC3041T
BT138-V
BT138-V
OI A
71.1
2
92.08
12
12
1 2 1 2
47u
100n
47u
100n
100n
100n
100n
47u
47u
100n
47u
100n
47u
CGRM4007-G
CGRM
4007
-G
IRLML6344
IRLM
L634
4
IRLML6344
IRLML5203
IRLML6344IRFU5305 IRLML6344
IRLML5203
IRLM
L634
4
5k
2k2
2k2
5k2k2
100k
1k5
3k9100k 10
0k
1k5
3k9
100k
1k5
3k9
2k2100k
1k5
360
1k5
330
2k2
100k
1k5
360 34
0
100k
Żaró
wka
pok
ójŻa
rów
ka B
iurk
o
3k93k9
3k9
3k9
Ziemia i ZeroWyjścia zer Żarówek
100n
B PCB layout of executive system
7
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