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48
WORLDÇѹÁÒµÃÇÔ·ÂÒâÅ¡ : World Metrology Day
SPECIAL
·íÒÍ‹ҧäÃãˌ໠š¹·Õè àª×èͶ×Íä´Œ
NIMT¡Òö‹Ò·ʹàÇÅÒÁҵðҹ¼‹Ò¹Ãкº FM/RDS
METROLOGY»ÃÐÁÇÅÀÒ¾¡Ô¨¡ÃÃÁ
NIMT
NIMT26th APMP General Assembly and Related Meetings 2010 IMEKO 2010 : TC3, TC5 and TC22 Conferences
1912
20
24
2Vol.12 No.57 July-August 2010
Advisors AVM Pian TOTARONG, Somsak CHARKKIAN, Maj. Gen. Chainarong CHERDCHU, Veera TULASOMBAT, Ajchara CHAROENSOOK,Gp. Capt. Piya BHUSAKAEW, Prawet MAHARATTANASAKUL, Virat PLANGSANGMAS, Flt.Lt. Tawat CHANGPAN, SomchaiNUAMSETTEE, Maj. Arkom KRACHANGMOL, Dongkamol VIROONUDOMPHOL, Nattanit PONGIJEERAKUMCHORN
Editor Prasit BUBPAWANNAAssistant Editors Janwalee DANTANASAKORN, Watchareeporn KLINKHACHORNPublisher Public Relations Section, Policy and Strategy Department, National Institute of Metrology (Thailand), Ministry of Science and Technology
3/4–5 Moo 3, Klong 5, Klong Luang, Pathumthani 12120, Thailand Tel: 0 2577 5100 Fax: 0 2577 2877, 0 2577 2859E-mail: [email protected] Website: http://www.nint.or.th
EDITOR'S
th
3Vol.12 No.57 July-August 2010
WORLD
ʶҺѹÁÒµÃÇÔ·ÂÒáË‹§ªÒµÔ
4Vol.12 No.57 July-August 2010
SI
KSA
mol m
kgcd
5Vol.12 No.57 July-August 2010
6Vol.12 No.57 July-August 2010
7Vol.12 No.57 July-August 2010
SPECIAL
8Vol.12 No.56 May-June 2010
9Vol.12 No.56 May-June 2010
Vol.12 No.56 May-June 2010
11Vol.12 No.56 May-June 2010
12Vol.12 No.57 July-August 2010
¡Òö‹Ò·ʹàÇÅÒÁҵðҹ¼‹Ò¹ÃкºFM/RDS
NIMT
13Vol.12 No.57 July-August 2010
FM/RDS Broadcast System
RDS Group 4A
Broadcast Station102.5 MHz RTAF
ExciterRDS Encoder
Network Time Protocol
GPSReceiver
L-R Stereo Signal
FM/RDS Receiver
AntenaL-R Stereo Signal
CT Clock Data
Signal Processing Module
Micro-ControllerModule
Digital SignalProcessing
ModuleTime Code
Amp/Speaker
14Vol.12 No.57 July-August 2010
Modified Julian Day code(5 decimal digits)Spare bitsB0TP
+ PTY + + +
UTC
Hour Minute Local time offset
Modified Julian Day code
0 0 0 2 20 2 2 22 2 20 25 2 2 22 2 20 + 2 2 22 2 202 20
Hour code Sense of local time offset0= +, 1= -
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19Vol.12 No.57 July-August 2010
19
»ÃÐÁÇÅÀÒ¾NIMT
NIMT
Vol.12 No.57 July-August 2010
CCQM-K51 Carbon monoxide in nitrogen
Deg
rees
of e
qulv
alen
ce (%
)
NM
U
NM
ISA
UBA
(D)
VNIIM
SMU
NPL
CERI
BAM
CEM
CEN
AM
GU
M
INM
ETRO IP
Q
JRC
KRIS
S
LNE
MET
AS
NIM
NIM
T
NIS
T
VSL
NPL
I
FMI
NM
IA
Laboratory
-3
-2
-1
0
1
2
3
4
21Vol.12 No.57 Jury-August 2010
(k=2)
22Vol.12 No.57 July-August 2010
23Vol.12 No.57 Jury-August 2010
