ALPHA ARS-SM01 79GHz Radar Instruction Manual
- June 6, 2024
- Alpha
Table of Contents
ALPHA ARS-SM01 79GHz Radar
INTRODUCTION
The ARS-SM01 sensor kit is used to detect whether there are obstacles behind
the vehicle to visually and audibly assist the driver when the vehicle is
moving backwards. This product is extremely useful when the vehicle is
reversed into a parallel, perpendicular, or an angled parking space. 
PACKAGE CONTENTS
The following items are included in the package:
NOTE: If any of the items, mentioned above, are not included in the packaging or are damaged in any way, contact your reseller immediately.
PRECAUTIONS
The ARS-SM01 is a product that assists drivers in normal parking conditions. The responsibility to control the vehicle and avoid collisions still belongs to the driver.
INSTALLATION PRECAUTIONS
- Make sure that the surface of the inner bumper is as clean and smooth as possible before installing the sensors onto it. Any dents or scratches could degrade the performance of the radar.
- The proper installation order is, install the cables first, then connect them to the power/ground connections, then connect the sensors to the cables, and then attach the sensors to the bumper.
- Make sure that the surface of the outer bumper, especially in front of the radar sensors, is as clean as possible. Dirt, clay, snow, stickers, or any other item in front of the sensors could interfere with its normal operation.
- If the bumper was damaged due to an impact, the position, stability, and angle of the sensors must be checked for any visible offset from its original installation. A recalibration might be required.
- If the bumper was repainted, a recalibration must be performed. Minor performance changes like the maximum achievable detection distance might occur.
APPLICATION PRECAUTIONS
- Normal operation of the sensors will be interfered with or obstructed when the vehicle is being towed another vehicle.
- Abnormal operation might occur when the reversing speed limit of 15 km/h is exceeded.
- The position of the sensors, the properties of the bumper, and the surroundings like different types of ground surfaces might promote abnormal operation of the sensors.
- If the vehicle transports a heavy load or passes over a ditch cover or a large reflection, false alarms might occurs at a larger distance from the vehicle.
- Low obstacles might not be detected if the sensors were installed too high or tilted upwards too much.
INSTALLATION
The ARS-SM01 can be installed onto the inside of the rear bumper of most vehicles. To start the installation, unbox the ARS-SM01 and remove the rear bumper from the vehicle.
- Install the Master sensor onto the inside left corner of the rear bumper.
- Install the Slave sensor onto the inside right corner of the rear bumper.
- The distance between the two sensors must be 80 cm. The height of the sensors must be between 40 cm and 65 cm from the ground.
The flat side of the sensors must point to the back of the of the vehicle with the curved side to the front. The cables must point up. The sensors must be installed at a 90-degree angle, perpendicular to the ground. The installation angle (±θ) depends on the height of the bumper from the ground.
| Installation Height (±10 cm) | Installation Angle (θ) |
|---|---|
| 40 cm | 0° to 5° |
| 45 cm | -5° to 5° |
| 50 cm | -5° to 0° |
| 55 cm | -5° to 0° |
| 60 cm | -10° |
| 65 cm | -10° |
If the inside of the bumper is uneven, the gap between the sensor and the
uneven bumper should not be more than 1 mm.
The sensors will receive power from the reverse light of the vehicle. Connect
the power (12V) and ground cables to the power (12V) and ground cables of the
reverse light.
When installation is complete, the bumper can be re-installed onto the
vehicle. No electronic/electric products or equipment that contain metal
should be between the sensors and the area of detection.
INITIALIZATION
To initialize the ARS-SM01, after the installation, clear the area behind the vehicle (1 meter) of any obstructions and press the BGC toggle switch. BGC stands for Background Check. The initialization process is as follows:
- With the vehicle turned on, power the reverse lights by shifting the gear stick/selector (manual/automatic) into the reverse position. Toggle the BGC switch to the on (I) position.
- Wait until the buzzer makes a sound for longer than 1 second.
- Toggle the BGC switch to the off (O) position.
- Wait until the buzzer sound stops (about 3 seconds).
After the buzzer sound stopped, the initialization process is complete and the ARS-SM01 is ready for use.
DETECTION AREA
The ARS-SM01 can detect obstacles in the area behind the vehicle (maximum
distance 5m). The buzzer will sound when an object is detected within the
detection area and increase the sound intensity as the object gets closer to
the vehicle. The sensor detection area is illustrated in the figure below:
TECHNICAL SPECIFICATIONS
Power Supply| 9V to 18V| Power Consumption| Less than 0.9 Watt
(average)
---|---|---|---
Dimensions (L x W x H)| 45 mm x 39 mm x 34.8 mm| Weight| 18 gram
Operating Temperature| -40°C to 85°C| Storage Temperature| N/A
Operating Humidity| 10% to 90% (Non-condensing)| Storage Humidity|
0% to 95% (Non-condensing)
Frequency Range| 77 GHz to 81 GHz| Signal Range| 20 cm to 500 cm
FOV (Horizontal)| 130°| FOV (Vertical)| 50° (10° default tilt
upwards)
Cable Length (Master-Slave)| M-197 cm / S-147 cm| Cable Length
(Slave-Buzzer)| 150 cm
Cable Length (Slave-BCR)| 120 cm|
Warning Statement
FCC 15b devices (15.105)
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.
FCC Part 15.21 information for user
You are cautioned that changes or modifications not expressly approved by the
party responsible for compliance could void your authority to operate the
equipment.
FCC Part 15.19
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