Hunan SW-UWB-M-A2X2 Vital Signs Monitoring Radar Module User Manual
- October 30, 2023
- Hunan
Table of Contents
User’s Manual
Product Name: Human Vital Signs Monitoring Radar Module
Model Number: SW-UWB-M-A2X2
SW-UWB-M-A2X2 Vital Signs Monitoring Radar Module
Note:The host providers can only use granted modular,reuse test data of
granted modular for host,A letter giving permission from modular manufacture
to host manufacture shall be included the change-in-FCC ID application.Please
contact modular manufacture for details:
Phone:0731-89714008
Email: [email protected]
Host manufacture is recommended to use D04 Module Integration Guide
recommending as“best practice”RF design engineer testing and evaluation in
case non-linear interactions generate additional non-compliant limits due to
module placement to host components or properties
For standlone mode，reference the guidance in D04 Module Integration Guide and
for simultaneous mode;see D02 Module Q&A Question 12，which permits the host
manufactures to confirm compliance.
Introduction
SW-UWB-M-A2X2 human vital signs monitoring radar module is a product for
monitoring vital sign parameters without contacting Human body. Based on ultra
wide-band(UWB) radar technology, it can scan the human body and sense the
undulating movements of the chest by transmitting, receiving and processing
electromagnetic waves. Using the relavant signal processing methods, the
product can realize the monitoring functions of human respiration and heart
rate and the application and assessment of sleep quality. The module contains
radar transceiver antenna, radar SoC, ARM processor and other chips. The
algorithm program runs in ARM processor and outputs the detection results
directly.
1.1 Technical Features
- Synchronous detection: human respiration and heart rate.
- Contactless detection: no electrode or sensor touched the body.
- Strong penetration ability: can penetrate clothes, bedding and other fabrics to detect human without intentional cooperation.
- Dynamic detection: automatically focus on the human body for dynamic monitoring within a certain distance (up to 3m).
- long-term detection: continuous real-time monitoring of human vital signs.
- Low radiation power: prolonged exposure causes no harm to the body.
- High immunity: Built-in MCU and multi-digital filtering algorithm.
- Support secondary development, adapt to a variety of scenarios.
1.2 Basic Parameters：
Basic Parameters
Model Number| SW-UWB-M-A2X2
Size| 60×34×10mm
Connector| Double row straight pin（ 2*6P, pitch 2.54mm, Including power supply
and communications）
Communication| UART
Radar Parameters
Detection Data| Human state: absense, calm, quiet, movements, continuous
movements
Respiratory rate: average number of breaths per minute
Heart rate: average beats per minute
Detection Distance| 0.5m-3m
Detection Range| Respiratory rate: 4-40 times/min
Heart rate: 40-150 times/min
Detection Precision| Respiratory rate: 98%
(Taking ECG as the standard, the + / – 3bpm error is regarded as “accurate”,
and 98% of the data points fall within the “accurate” range)
Heart rate: 90%
(taking ECG as the standard, the + / – 10bpm error is regarded as “accurate”,
and 90% of the data points fall within the “accurate” range)
Other Function| Abnormal breathong alarm and sleep analysis report
Working parameters
Power Voltage| DC 3V ~ 5.5V
Power consumption| ≤0.7W
Working Temperature| -20℃ ~ +50℃
RF Specifications
Working Frequency| Radar(UWB): 6.5~8.1GHz
Transmission Power| Radar(UWB): <-5 dBm
Antenna Type| Radar(UWB): PCB onboard antenna
Wiring Diagram
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Hardware considerations
3.1 Power Requirements
The requirement of power quality of this radar module is higher than that of
conventional low frequency circuit. When supplying power to the module, the
power supply is required to have low ripple and good grounding, and to
effectively shield the power supply noise that may be caused by other device.
The module power supply requires +3V ~ +5.5V power supply, especially the
power supply voltage can not be lower than 3V. In order to ensure the normal
operation of the internal circuit of the module, the external power supply
must provide sufficient current output capacity and transient response
capacity.
3.2 Layout Requirements
- PCBA: note that the antenna surface of the radar module should not be obscured and should be higher than other devices.
- Shell: avoid installing metal shell or accessories, which will block the radar electromagnetic wave and affect the detection effect.
Device Installation
When the product monitors human heart rate and respiration, it is mainly based
on the ups and downs of the human chest cavity and the beating of the heart.
Therefore, the installation needs to be facing the position of the human heart
to achieve the best test performance.
This module is mainly suitable for monitoring the human body in bed rest
state, so the recommended installation methods in practical applications
include top-mounted and tilt-mounted.
4.1 Top-mounted
The top-mounted method is shown in . The radar is mounted horizontally and
fixedly on the ceiling, the radar beam is vertically downward facing the human
body, and the center of the beam is facing the human heart position. The
recommended installation height is H≤3m.
4.2 Tilt-mounted
The Tilt-mounted method is shown in . The radar is tilted and fixed on the
bedside wall or bedside, the radar beam is tilted to illuminate the human
body, and the center position of the beam is opposite to the human heart
position. It is recommended to install height H=1m~1.5m.
4.3 Precautions and Instructions
- Radar should be fixed to ensure that there is no loose shaking.
- There is no obvious shielding and covering in front of the radar to avoid the occlusion of metal objects in the detection area.
- When multiple radar modules are used in the same site, it is recommended that the installation distance is more than 1.5m. If the installation distance is too close, it may cause interference and cause false positives.
- This radar module is suitable for indoor environment without vibration interference. If there are energy fluctuations caused by moving objects, the monitoring effect may be affected. (the number of moving objects that should be reduced within the radar detection range can improve the accuracy of physical sign measurement.)
4.4 Radar module effective detection range description
a) If the radar is not directly facing the heart position of the human body,
affected by the radiation characteristics of the radar antenna and deviating
from the radar normal direction, the radar measurement accuracy will be
slightly deviated.
b) There are differences in measurement accuracy among different personnel /
positions, and radar does not guarantee that all states achieve the best
monitoring results.
c) Radar can not distinguish between movement caused by breathing and other
body movements. if the human body is active, it will interfere with the
reception of chest undulation echoes, thus affecting the accuracy of radar
monitoring of heart rate and respiratory rate.
d) When there is an object with stronger reflectivity around the measured
target, the radar may track the strong reflection target when it is working.
At this time, the human life parameters monitored by the radar are abnormal,
so it is necessary to adjust the radar position.
e) At present, this radar module can only measure a single target, but can not
measure multiple targets for the time being, so when many people are in the
radar monitoring area, they can only monitor the parameters of human vital
signs which are closest to the radar and have the largest energy.
f) Since human biometrics belong to ultra-low frequency and weak reflection
characteristic signals, radar needs to accumulate and process for a relatively
long time. In the process of accumulation, many factors may affect radar
parameters, so occasional detection failure is a normal phenomenon.
Communication Protocol 《DreamCare Protocol》
5.1 Serial Communication Definition
- Interface Level: TTL
- Baud Rate: 115200
- Data Bits: 8
- Stop Bit: 1
- Check Digit: None
5.2 Definition of Data Packet Type
Please refer to the technical specifications for details.
FCC Warning
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 inte rference received,
including interference that may cause undesired operation.
Changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.
NOTE: 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
interferenceto 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.
Radiation Exposure Statement
The device has been evaluated to meet general RF exposure requirement.
The modular must be installed in the host device.
The end host can installed and operated at mixed portable exposure and mobile
exposure with a minimum distance of 20cm between the radiator and your body.
Important Note:
In the event that these conditions cannot be met (for example certain laptop
configurations or co -location with another transmitter), then the FCC
authorization is no longer considered valid and the FCC ID cannot be used on
the final product.
In these circumstances, the OEM integrator will be responsible for re-
evaluating the end product (including the transmitter) and obtaining a
separate FCC authorization.
End Product Labeling
The final end product must be labeled in a visible area with the following”
Contains FCC ID: 2BAR7-A2X2″
Integration instructions for host product manufacturers according to KDB
996369 D03 OEM Manual v01r01
2.2 List of applicable FCC rules
CFR 47 FCC PART 15 SUBPART F has been investigated. It is applicable to the
modular transmitter
2.3 Specific operational use conditions
This module is stand-alone modular. If the end product will involve the
Multiple simultaneously transmitting condition or different operational
conditions for a stand-alone modular transmitter in a host, host manufacturer
have to consult with module manufacturer for the installation method in end
system.
2.4 Limited module procedures
Not applicable
2.5 Trace antenna designs
Not applicable
2.6 RF exposure considerations
The device can installed and operated at mixed portable exposure and mobile
exposure with a minimum distance of 20cm between the radiator and your body.
2.7 Antennas
This radio transmitter FCC ID:2BAR7-A2X2 has been approved by Federal
Communications Commission to operate with the antenna types listed below, with
the maximum permissible gain indicated. Antenna types not included in this
list that have a gain greater than the maximum gain indicated for any type
listed are strictly prohibited for use with this device.
Antenna Model：Differential Four-element Top-beam Antenna
Gain as follows max gain of 5dBi
| Frequency(GHz) | 7.1 | 7.5 | 7.9 |
|---|---|---|---|
| Gain(dBi) | 4.56 | 5.00 | 4.63 |
2.8 Label and compliance information
The final end product must be labeled in a visible area with the following”
Contains FCC ID:2BAR7-A2X2″.
2.9 Information on test modes and additional testing requirements
Host manufacturer which install this modular with single modular approval
should perform the test of radiated emission and spurious emission according
to FCC part 15F,15.209,15.207 requirement, only if the test result comply with
FCC part 15F,15.209,15.207 requirement, then the host can be sold legally.
2.10 Additional testing, Part 15 Subpart B disclaimer
Host manufacturer is responsible for compliance of the host system with module
installed with all other applicable requirements for the system such as Part
15 B.
Note: Host devices must comply with the requirements of §15.517 (a). The
host’s user manual shall bear a statement on the device or in the instruction
manual stating, “This equipment may only be operated indoors. Operation
outdoors violates 47 U.S.C. 301 and could subject the operator to serious
legal penalties.”
UWB devices may not be employed to operate toys. Operation on board an
aircraft, a ship, or a satellite is prohibited.