USER MANUAL - DOS048-004
AMG Microwave
Document : DOC0681-V1
Date : 09/11/2016
Version : 1
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Table of contents
1. INTRODUCTION AND SUMMARY ....................................................................... 4
2. ABBREVIATIONS ................................................................................................. 4
3. GENERAL DESCRIPTION ................................................................................... 5
3.1 DOS048-004 shortcut ..................................................................................... 5
3.2 Measuring principle ........................................................................................ 5
3.3 System description ......................................................................................... 6
3.4 Specifications ................................................................................................. 7
3.5 Antenna diagram ............................................................................................ 8
4. HARDWARE ......................................................................................................... 9
4.1 DOS048-004 .................................................................................................. 9
4.2 Hardware architecture .................................................................................... 9
4.3 Mechanical Outline ....................................................................................... 10
4.4 Data interfaces and connectors .................................................................... 11
4.5 Serial links .................................................................................................... 13
5. DESIGNATED USE ............................................................................................ 15
6. DECLARATION OF CONFORMITY .................................................................... 16
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Liste of figures :
Figure 1. FSK radar schematics ............................................................................................................. 5
Figure 2. Radar and connectors diagram ............................................................................................... 6
Figure 3. Vertical (elevation) plan diagram, with plexi glass plate ....................................................... 8
Figure 4. Horizontal (azimuth) plan diagram, with plexi glass plate..................................................... 8
Figure 5. DOS048-004 ........................................................................................................................... 9
Figure 6. DOS048-004 Mechanical Outline (front, top and lateral) .................................................... 10
Figure 7 : "Micromatch” connector broaching .................................................................................... 11
Figure 8 : “Harwin” connector broaching ............................................................................................ 12
Figure 9. Serial link diagram ............................................................................................................... 14
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USER MANUAL - DOS048-004
1. Introduction and Summary
The purpose of this document is to provide a short technical description of the DOS048-004
radar.
The following, are the main topics developed by the document:
- General description of radar and of its operating principles
- Features and specifications of the RF module
- Description of signal processing
- Description of Input / Output signals
- Mechanical characteristics of the radar
- Product performance
2. Abbreviations
FMCW Frequency Modulated Continuous Wave
FSK Frequency Shift Keyed
VCO Voltage Controlled Oscillator
FFT Fast Fourier Transform
DSC Digital Signal Controller
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c
FD
DD
..444
01
F0 and
Control
Doppler 0
Doppler 1
3. General description
3.1 DOS048-004 shortcut
The DOS048-004 is a low consumption K band pedestrian presence sensor. It operates in FSK
mode at 24.125GHz with a pulse frequency of 100 kHz and pulse width emission of 3μs. Two
low frequency signals are created by the FSK; their phase difference indicates the distance of the
moving target. The gap between the two FSK frequencies is around 300 kHz.
A DSC generates pulse signal control, samples the two Doppler signals and updates 4 open
collector outputs. The software is based on FFT where an analysis of the activity is done
according to the distance.
The antenna aperture is greater than 90 degrees, four sensors are enough for omnidirectional
detection and a switch selects the address of the sensor.
Power supply: 12 V @ 16mA
3.2 Measuring principle
The phase measure between two Doppler signals produced by two different radar frequencies,
can measure the distance between the target and the radar.
Figure 1. FSK radar schematics
Where D is the distance, F the frequency difference and c the speed of light
In this device the Doppler signal enables the measuring of speed and, with the help of FSK,
allows the measuring of distance.
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Connector for link
Rotary switch for the
choice of radar (1 to 4)
“Micromatch” connector to
link radars
“Harwing” connector
to link system to Blue
Green board
Wide antenna beam
pattern 90 deg.
Narrow antenna beam
pattern 10 deg.
3.3 System description
The radar operates in the 24 GHz ISM band. Four independent radars can be connected in series
by a web of multi-wire planar cables/ribbon cables with 12 points. Each radar monitors an area
of 90 degrees over a distance of 0 to 35m. The distance detection area can be programmed by
the user.
In the 8-pin HARWIN connector we have: the 12v power supply, 4 TOR/digital outputs and a
UART communication bus.
A digital/TOR (on-off control) output is short-circuited if its corresponding radar detects the
movement of a pedestrian in his beam.
The link is used to program or to receive all information of speed and distance.
between digital board
and hyper board
Figure 2. Radar and connectors diagram
All 4 radars detect simultaneously. Each radar can trigger an alarm. The customer PC board can read
the characteristics of the target: speed, distance, power.
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Section
Description
Min
Typ.
Max.
Unit
Transmitter
Frequency (1)
24.05
24.250
GHz
Emission peak power
8
dBm
Emission average power
-12
dBm
Emission time
1
us
Emission frequency
10
kHz
Antenna
Antenna gain
12
dB
Vertical -3dB aperture
100
Deg.
Horizontal -3dB aperture
7
Deg.
Supply
Tension 8
30
V
Power supply per radar for
12V
12
mA
Mechanical
Dimensions LxWxH
93x74x30
mm
Environmental
Operating temperature
-30 70
°C
Storing temperature
-50 80
°C
Analog outputs
TOR output
Open
drain
IDS current
0.9
A
VDS tension
30
V
Serial
communication
RX and TX in LVTTL
3.3
V
Logic
Positive
Debit 9600
Bits/s
Number of bits
8
Bit
Parity
Without
Control flow
Without
Performance
Speed range
1 56
km/h
Speed resolution
0.2
km/h
Speed accuracy
NA
Distance range
0 50
m
Distance resolution
1
m
Distance accuracy
10
%
Detection distance for 1m²
30
m
Response time
1
s
3.4 Specifications
(1) : For Europe from 24.15 GHz to 24.25 GHz
(2) : For the USA from 24.075 GHz to 24.175 GHz
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3.5 Antenna diagram
Transmission and reception antenna have the same diagram.
Figure 3. Vertical (elevation) plan diagram, with plexi glass plate
Figure 4. Horizontal (azimuth) plan diagram, with plexi glass plate
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4. Hardware
4.1 DOS048-004
DOS048-004 is an OEM radar module formed by two parts: the first is composed by a board
with power supply and processor. The second, a board with the microwave part.
Figure 5. DOS048-004
4.2 Hardware architecture
The radio board has the following functions:
A VCO tuned for 24 GHz ISM band
A radio amplifier
A mixer
A low frequency amplifier
The processing board consists of the following:
A supply
An UART interface
A processor
A low frequency amplifier
2 connectors for neighbors’ sensors
1 connector for customer PC board
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4.3 Mechanical Outline
All dimensions are in mm
Figure 6. DOS048-004 Mechanical Outline (front, top and lateral)
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Pin
Signal
1, 2, 3
Valim: Supply voltage +12V
4, 5, 6
GND : 0V
7
TX: Data transmission to Blue Green board. LVTTL level.
8
RX: Data reception from Blue Green plan. LVTT level.
9
DETECT1
10
DETECT2
11
DETECT3
12
DETECT4
4.4 Data interfaces and connectors
The “Micromatch” radar connectors link each radar to the next.
Figure 7 : "Micromatch” connector broaching
Table 1: "Micromatch" connector broaching
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Pin
Signal
1
GND
2
DETECT4
3
RX: Data reception from Blue Green plan. LVTTL level
4
DETECT3
5
TX: Data transmission to Blue Green plan. LVTTL level
6
DETECT2
7
Valim: Supply voltage +12V
8
DETECT1
Figure 8 : “Harwin” connector broaching
Table 1 : “Harwin” connector broaching
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4.5 Serial links
Each radar is equipped with 2 “Micromatch” connectors of 12 points. The radars are linked to
their neighbours by two multi-wire planar cables.
The radars function in slave mode: a “response frame” is returned after the reception of a
“command frame”.
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RX
TX
Detect1
Detect2
Detect3
Detect4
RX
TX
Detect1
Detect2
Detect3
Detect4
Radar 4
RX
TX
Detect1
Detect2
Detect3
Detect4
RX
TX
Detect1
Detect2
Detect3
Detect4
Radar 3
RX
TX
Detect1
Detect2
Detect3
Detect4
RX
TX
Detect1
Detect2
Detect3
Detect4
Radar 2
RX
TX
Detect1
Detect2
Detect3
Detect4
RX
TX
Detect1
Detect2
Detect3
Detect4
Radar 1
TX
RX
Detect1
Detect2
Detect3
Detect4
Customer interface
Vbat
GND
Vbat
GND
Vbat
GND
Vbat
GND
Vbat
GND
Vbat
GND
Vbat
GND
Vbat
GND
Vbat
GND
PC -> Radar : Interrogation
Byte Description
1 0xAA
2 0x55
3 10 -> Write request to radar 1
11 -> Read request to radar 1
4 2 -> Min. of range
3 -> Max. of range
7 -> Restart adaptative filters
5 Data : 0 to 255
Radar -> PC : Reply
Byte Description
1 0xAA
2 0x55
3 Distance in meter
4
5 Velocity integer part 0 to 56 km/h
6
Cycle n n+1 n+2 n+3 n+4
Alarme_i
TX
Request read or write from customer
1 2RX
1
from 100 to 200ms
2
Reply from radar
from 4 to 10ms<70ms
Min. of range: from 0 to 50, 1 standard value
Min. of range: from 0 to 50, 35 standard value
Description
RS232 : 9600 bps/8 bits/1 stop/no parity/no control
Type UART, LVTTL (+3.3V)
Bit 0 -> not used
Bit 1 -> 0 coming dir., 1 leaving dir.
Bits 2 à 4 -> Radar id
Bit 5 : Eta t du radar, 0 norm al, 1 perturbé
7
Velocity inte ger part 0 à 9 to 0.1km/h
8
Radar gain
9
Signal level (dBlsb)
10
Parameter of adaptative filter - fixed11
20 -> Write request to radar 2
21 -> Read request to radar 2
30 -> Write request to radar 3
31 -> Read request to radar 3
40 -> Write request to radar 4
41 -> Read request to radar 4
Min. of range: from 0 to 50, in meter
Max. of range: from 0 to 50, in meter
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Figure 9. Serial link diagram
5. Designated use
The DOS048-004 is suitable for detection of targets inside a precise area (less than 50m) in a
quadrant of 90 degrees and more.
Signal processing with an adaptive filter suppress hazardous detection. The DOS048-004 is
designed to detect targets in very adverse operating conditions.
DOS048-004 starts operating as soon as the power supply is on, it does not need particular
parameters.
Its consumption is very low, it can be integrated in security systems powered by battery, solar
cells or long wire cables.
Typical applications:
- Security
- Sport
- Traffic control
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6. Declaration of conformity
This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This equipment generates, uses and can
radiate radio frequency energy and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by turning the equipment
off and on, the user is encouraged to try to correct the interference by one or more of the
following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver
is connected.
Consult the dealer or an experienced radio/TV technician for help
This equipment complies with FCC’s radiation exposure limits set forth for an uncontrolled
environment under the following conditions:
1. This equipment should be installed and operated such that a minimum separation distance
of 20cm is maintained between the radiator (antenna) and user’s/nearby person’s body at
all times.
2. This transmitter must not be co-located or operating in conjunction with any other
antenna or transmitter.
Changes or modifications not expressly approved by AMG Microwave for compliance could
void the user's authority to operate the equipment.
The technical specification of this document is approved by:
AMG Microwave
11 rue Louis de Broglie
22300 Lannion, France
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