SMART RADAR RM68-51 Detection Sensor User Manual
- June 3, 2024
- SMART RADAR
Table of Contents
RM68-51 Detection Sensor
User Manual
www.smartradarsystem.com
Product Specification & User’s Manual:
Detection Sensor RM68-51
RM68-51 Detection Sensor
Status:
Initial| Date:
Feb 16. 2022| Author:
Smart Radar System
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Version:0.1| Document number:| Filename: RM68-51 Detection Sensor
Specification (User’s Manual)
Revision Sheet (history)
Release No.| Date|
Revision Description
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Rev. 0.1| 02/16/2022| Initial draft
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Overview
1.1. Introduction
The radar module “RM68-51” from Smart Radar System (SRS) is a compact
millimeter wave detection sensor optimized for detecting minute movements of
objects at close area. It has an embedded program on the board that can be
configured to meet the various application requirements. With the help of
unique antenna design technology and algorithms, it can reliably detect even
the breathing and heartbeats of people in the room.
The sensor uses TI’s integrated single-chip mmWave sensor IWR6843, to support
a friendly and easy-to-use FMCW (Frequency Modulated Continuous Wave) radar
platform. The TI device includes two ARM R4F-based processor subsystems: one
processor subsystem is for master control, and additional algorithms; a second
processor subsystem is responsible for front-end configuration, control, and
calibration. It can be configured to respond to a variety of application needs
by simple programming.
1.2. Features
- 60-64 GHz radar sensor for detection of minute movements like heartbeat and breathing,
- Synthesized FMCW frequency source
- 20-pin connectors interface connector
- FTDI with a serial port for onboard QSPI flash programming
- Back-channel UART through USB-to-PC for logging purposes
- Onboard
- LEDs for displaying operation
- 5V DC to power the product
1.3. Application
The sensor performs the following functions while fixed to a wall or ceiling.
- Human presence detection
- People counting in indoor environments
- Vital sign detection of a person indoors
- Posture detection of a person in a room or bathroom
☞ For FCC, the sensor module is for fixed operation only. It must be mounted on an enclosure and a bracket so that it can be installed on a fixed structure such as a wall or ceiling. (Please refer to chapter 5)
Hardware Description
1.1.Product Appearance
The top and bottom views of the RM68-51 module are shown as follows.
2.2 Connector Interface
Part Number: A3A-20DA-2SV(71) (Hirose)
Table 1. 20-Pin IO Connector Pin
| IN/OUT | Name | No. | Name | IN/OUT |
|---|---|---|---|---|
| Input Power | VDD_5V0 | 1 | 2 | |
| GND | 3 | 4 | GND | |
| Differential signal | CAN_L | 5 | 6 | |
| Differential signal | CAN_H | 7 | 8 | |
| GND | 9 | 10 | GND | |
| Output power | VIO_3V3 | 11 | 12 | |
| Output Signal | UART2_TX | 13 | 14 | |
| Input Signal | UART2_RX | 15 | 16 | |
| Input Signal | SOP2 | 17 | 18 | |
| Input Signal | SOP0 | 19 | 20 |
2.3 LEDs
Table 2. LEDs Information
Ref Num.| Usage|
Comments
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LED1| USER LED| Glows when the radar operation is activated. (can be
changed according to software settings.)
**LED2| ** RESET| This LED is used to indicate the state of RESET
pin. If this LED is glowing, the device is out of reset. This LED will glow
only after the 5-V supply is provided.
Mechanical Specification
Items| Spec.|
Notes
---|---|---
Dimension| 42 x 42 x 8 (PCB t: 1.6)| Module only (WⅹLⅹH) (mm)
Weight| 14| Module only (g)
Specifications
4.1 Absolute Maximum Ratings
| Parameters ………………………………………Conditions | Spec. | Notes |
|---|---|---|
| Min | Max | |
| Operating Temperature | Complete Sensor | -20 |
| Storage Temperature | Complete Sensor | -40 |
| Supply Voltage | 4.75 |
4.2 Performance Specifications
Parameters………………………………………………………………………………… Spec……………………………………………………….Notes
Detection Range| Distance| 5m| People
Detectable Floor Area| 3m x 3m (@2.7m height)| When installing on a
ceiling
Azimuth Angle (H. FOV)| 120° @3m, 20° @5m|
Azimuth Resolution| 22°|
Elevation Angle (V. FOV)| 120° (±60°)|
Elevation Resolution| 31°|
Update rate| 100ms| Configurable
※ Specifications in this datasheet are subject to change without notice.
4.3 Radar Operating Conditions
Parameters……………………………………………………………….Spec……………………………………………………………….Notes
Power Consumption| Ave.:1.5W, Peak.: 3W|
Frequency
| Range| 60 ~ 64 GHz|
Bandwidth| 4GHz|
Antenna Power| – 10dBm| FCC requirement
Max. Transmitted Power (EIRP)| 10 dBm| FCC requirement
Installation Guide
To comply with FCC regulations for fixed operation, final device must consider the following:
- For long-term stable operation, the module must be mounted in a plastic enclosure made of PC (polycarbonate).
- Install the bracket at the desired location and then mount the enclosure to the backet.
- Use a tiltable bracket if you need to adjust the angle the radar faces.
< Example of the module mounted in an enclosure > 
< Example of fixed
installation >
Product Storage and Using Recommendations
The plated finish of the PCB provides better high frequency performance, but is prone to oxidation in environments with high humidity or corrosive gases. Please do not use in high humidity or in environments with sulfur or chlorine.
Notice for FCC
FCC Approval
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.
Any changes or modifications not expressly approved by the party responsible
for compliance could void the user’s authority to operate this equipment.
This device should be installed and operated with minimum 20Cm between the
radiator and your body.
INTEGRATION INSTRUCTIONS
List of applicable FCC rules
This module complies with part 15.255 of the FCC rules.
Summarize the specific operational use conditions
15.255(a) Operation under the provisions of this section is not permitted for
the following products:
(1) Equipment used on satellites.
(2) Field disturbance sensors, including vehicle radar systems, unless the
field disturbance sensors are employed for fixed operation, or used as short-
range devices for interactive motion sensing. For the purposes of this
section, the reference to fixed operation includes field disturbance sensors
installed in fixed equipment, even if the sensor itself moves within the
equipment.
The module is limited to installation in fixed applications only.
Limited module procedures
Not applicable
Trace antenna designs
Not applicable
RF exposure considerations
This module complies with FCC RF radiation exposure limits set forth for an
uncontrolled environment. This device should be installed and operated with
minimum 20Cm between the radiator and your body. The host manual shall include
the RF exposure statements. If RF exposure statements and use conditions are
not provided, then the host product manufacturer is required to take
responsibility of the module through a change in FCC ID (new application).
Antennas
The module itself has antenna.
Label and compliance information
The module is labeled with its own FCC. If the FCC ID is not visible when the
module is installed inside another device, then the outside of the device into
which the module is installed must also display a label referring to the
enclosed module. In that case, the final end product must be labeled in a
visible area with the following: “Contains FCC ID: 2AVKZRM68-51”
The host manual shall include the following regulatory statement:
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.
Any changes or modifications not expressly approved by the party responsible
for compliance could void the user’s authority to operate this equipment.
This device should be installed and operated with minimum 20Cm between the
radiator and your body.
Information on test modes and additional testing requirements
Testing of the host product with all the transmitters installed – referred to
as the composite investigation test- is recommended, to verify that the host
product meets all the applicable FCC rules. The host manufacturer can use the
software to control the RF signal during test.
For more information, please contact us.
Additional testing, Part 15 Subpart B disclaimer
The modular transmitter is only FCC authorized for the specific rule parts
(i.e., FCC transmitter rules) listed on the grant, and that the host product
manufacturer is responsible for compliance to any other FCC rules that apply
to the host not covered by the modular transmitter grant of certification. The
host product may need to be evaluated against the FCC Part 15B criteria for
unintentional radiators in order to be properly authorized for operation as a
Part 15 digital device.