Alpha Arc-dg01 Eculess 90ghz Mmwave Radar Sensor User Manual (+ PDF)

Date	Release	Author	Description
2020/07/03	0.1	Vic Wu	Initial Draft
2020/11/23	0.2	Vic Wu	Modified to the new spec.
2020/12/01	0.3	Vic Wu	Modified to the product dimension.
2021/01/28	0.4	Vic Wu	Modified to the scenario and pin define.
2021/02/04	0.5	Vic Wu	Modified to the scenario
2021/02/09	0.6	Vic Wu	Modified to the product dimension.
2021/07/07	0.7	Vic Wu	Modified to the scenario
2021/12/16	0.8	Vic Wu	Modified to the 8+6NC pin spec.
2022/04/08	0.9	William Lee	Add Cable Pin Define
2022/04/08	1.0	Kent Huang	Modified housing dimension.
2022/07/13	1.1	Dean Chiu	Modified Application and remove Pin Define
2022/11/02	1.2	Evan Dang	Delete System Block Diagram and modification operating frequency

1. Product Description

The ARS-DG01 product is an integrated FMCW radar sensor capable of operation in the 79GHz band. The radar sensor’s main task is to detect objects and measure their speed and position relative to the movement of the vehicle in which it is fitted. When driving on the road, the motorcycle’s blind spot the area just behind the motorcycle is a constant source of danger and often the cause of serious accidents. Alpha has developed the Rear Collision Warning (RCW) solution – the RCW system product. The RCW system product is a cost-effective and all in one solution suited to all motorcycle segments. It consists of one mid-range Radar. The Rear Spot Detection works by using one mid-range radar sensors on the motorcycle. Powerful control software collates the sensor information to create a complete picture of all traffic in the area behind the motorcycle. Whenever another vehicle approaches at speed from behind or is already present in the blind spot, a warning LED light in the side mirror alerts the driver to the hazard. With Alpha’s Blind Spot Detection solution, accidents that happen while changing lanes can be prevented.

2. Features

79 GHz Short Range Radar suited to Rear Collision Warning (RCW) applications
Detects approaching objects
Simultaneous Doppler and FMCW processing whilst fast-scanning (no mode change required)
Self- calibration function reduces fitting cost
Low power consumption and high reliability
Small size for easy integration into the motorcycle
Capable of detection of rearward vehicles up to 25m for RCW.
Programmable alert zones for different motorcycle types, models, and functions
ARS-DG01 operates in 12 volts

3. Specification

Parameter	Value	Unit
Radar Characteristics
Operating frequency	78.1~78.58G	GHz
Power Supply	12	V DC
Power Supply (A)@12V	0.126	A
Peak Power Supply (A)@12V	0.367	A
Distance measurement	RCW : 25	m
Speed measurement	-5…+70	kph
FOV	100	deg
Distance measurement accuracy	0.5	m
Speed measurement accuracy	2	kph
Angle measurement accuracy	1.5	deg
Object separation capability – Distance	0.37	m
Object separation capability – Speed	1	kph
Object separation capability – Angle	10.87	deg
Emitted radar power (EIRP)	22.3	dBm
Update time	100	ms
Normal Power consumption	1.1512	W
Voltage surge power consumption	4.404	W
Mechanical size (with connector)	49(L) x 53(W) x 38.75(H)	mm
Mounting area	vertically : between 60~80cm above road surface level
Temperature range	operating : -40~ +85	°C
Temperature range	storage: -40~ +90	°C
Shock	ISO 16750-4.2.2
Vibration	ISO 16750-3.4.1.3.1.5 ISO 16750-3.4.1.3.2.3
Protection rating (Mating connector)	IP67

4. Application

RCW radar system start conditions:
ACC ON
LED warning mode:
Lighting
No light
Radar update time:
100ms
79GHz RCW radar detection behavior:

1. BSD Start condition:
a. When the target enters between A and B segments
b. When the target enters between D and E segments
c. The target is approaching at a relative speed of 4km / hr
2. LCA Start condition:
a. When the target enters between B and C segments
b. When the target enters between D and E segments
c, TTC is less than 3 seconds

4. Warning distance
a. Relative velocity≤6 km/h: 5m
b. 30 km/h > Relative velocity > 6 km/h : 5~25m
Warning distanc = Relative velocity ÷ 3.6 × 3

Relative velocity (Km/h)	Warning distance (m)
6	5
12	10
18	15
24	20
30	25

c. Relative velocity≥30 km/h: 25m

5. Product Dimension

The ARS-DG01 product dimension is 49(L) x 53(W) x 38.75(H) mm (with connector). Radar weight: 62.8 g/ per pcs

6. Radar Setup

In order for the radar evaluation, the system needs to be setup properly. To fulfill the Rear Collision Warning (RCW) application, we recommend the radar product to behind the motorcycle, and mounted between 60~80cm above the road surface level, vertically, at a certain squint angel.

When installing the radar sensor on the rear of the motorcycle, the indicator should face down.

7. Test Environment

8. Cable Pin Define

NO.	Function/ARS-DG01	Description	Color
Pin1	GND	Bare Wire
Pin2	UART_RX	NC
Pin3	UART_TX	NC
Pin4	DL	NC
Pin5	LED_L	Connector
Pin6	SPEED	NC
Pin7	PARK	NC
Pin8	PWR	Bare Wire
Pin9	TRIG_R	NC
Pin10	TRIG_L	NC
Pin11	BUZZER	Connector
Pin12	LED_R	Connector
Pin13	REV	NC
Pin14	ACC	NC

IMPORTANT NOTE:

FCC Radiation Exposure Statement:
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator & your body.

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate this equipment.