Table of Contents Overview ................................................................................................................. 3 1. Principle of operation ....................................................................................... 3 2. Hardware Design Considerations .................................................................. 4 2.1 The power supply can be designed with the following circuit in mind 4 2.2 using the wiring diagram................................................
Overview This document focuses on the use of the radar, the issues that need to be addressed at each stage to minimise design costs and increase product stability and improve the efficiency of project completion. From hardware circuit reference design, radar antenna and housing layout requirements, how to differentiate between interference and multi-functional standard UART protocol outputs.
enables the measurement of target parameters (breathing, movement, micro-motion, etc.) and scene evaluation. 2. Hardware Design Considerations The radar needs to have a rated supply voltage of 4.9 - 6V and a rated current requirement of 200mA or more input under normal operating conditions. The power supply must be designed for a supply ripple of ≤ 100mv. 2.1 The power supply can be designed with the following circuit in mind Fig. 1 Fig.
2.2 using the wiring diagram Fig. 3 Schematic diagram of the radar module and peripheral connections 3. Antenna and housing layout requirements PCBA: the radar needs to be kept ≥ 1mm higher than the other components Housing construction: need to maintain a distance of 2 - 5mm between the radar antenna face and the housing face Housing detection surface: non-metallic housing, needs to be flat and straight to avoid curved surfaces which can affect the performance of the entire swept surface area. Fig.
4. Static Protection Radar products have electrostatic sensitive circuitry and are susceptible to electrostatic hazards, therefore they need to be adequately protected from static electricity during transport, storage, work and handling. When handling radar sensors, please wear anti-static gloves if possible. 5. Functional disturbances 5.
5.2 Manned status, abnormal output unoccupied Radar determines the presence of a human body by sending and receiving electromagnetic waves. The closer you are to the radar, the more accurate it is. A. Human body out of radar range Radar scanning range with adjustment of mounting angle. Radar measurement range, in different environments with different electromagnetic wave reflection areas, the scanning area will vary slightly. B.
Functions DP4: Body movement amplitude parameter 0 - 100 DP5: Sensitivity setting 1 - 10 steps Status change time/function explanation Data output once every 5 seconds Reference (description of output of body motion amplitude parameters) Default scene mode, adapted to 10 positions of adjustment DP6: Scene modes (bed, bathroom, hotel, Adapted to different scenarios according to bedroom, office, default mode) the size of the area DP7: No false alarm confirmation prompt DP8: Sleep parameter switch DP9:
6.2 Description of the output of the body motion amplitude parameter Body movement amplitude parameters 0% None Environmental unmanned 1% Stationary (sleep) Only breathing without body movement 2% - 30% Micro-Movements Only minor head or limb movements Movement 31% - 60% Walking/fast body movements Slower body movements 61% - 100% Running/close range big Rapid body movement moves 7.
Starting Code Length of data Function Address Address codes code 1 code 2 Data Check Code 0X55 Lenth_L Lenth_H Command Address_1 Address_2 Data Crc16_L Crc16_H 1 Byte 1 Byte 1 Byte 1 Byte 1 Byte 1 Byte n Byte 1 Byte 1 Byte Starting Length Function Address Address Code of data codes code 1 code 2 Data Check Code B. Description of the frame structure a. Start code: 1 Byte, fixed to 0X55. b. Data length: 2 Byte, low byte before, high byte after.
8.
24G Bio-aware radar interface content Corresponding to1 2 3 4 5 6 Threshold 1 gear 0x0C 7 8 9 10 gears Enumeration range1~10 (default 7) The higher the gear, the more sensitive it is 2 Default mode 0x00 Area detection (top loading) 3 0x01 Bathroom (top mounted) 4 5 6 7 copy System order parameters 0x02 0x04 Scene 0x02 setting 0x10 Bedroom (top loading) 0x03 Living room (top mounted) 0x04 Office (top loading) 0x05 8 Hotel (top loading) 0x06 No forced access to the unoccupied function 0X0
24G Bio-aware radar interface content Other 9 functions 0X05 Reboot 0X04 Sleep 10 function switch 0x0D Start OTA upgrade 0X08 Off 0x00 On 0x01 4byte Integer data (firmware package size)+ nbyte (software version number) Upgrade package Packet Offset (4byte) + transfer Packet (1024byte) 0X09 End of upgrade information Fixed characters 0X0F 0X0A 24G Bio-aware radar interface content 1 2 3 4 Passive reporting of orders 0x03 Device ID 0x01 12 Byte data Reporting module Software version 0x02 10
24G Bio-aware radar interface content 1 Nobody 00 FF FF 2 Upload 3 Radar Info Environment status 0x05 Movement 01 01 01 0x03 4 Signs parameters 0x06 5 Threshold gear 0X0C 6 12 Current gear value (0X01~0X0a) 0x01 Bathroom (top mounted) Scene setting 0x10 Passive reporting 11 Appendix 2) Area detection (top loading) 8 10 4 Byte Float data (see Default mode 0x00 7 9 Static 01 00 FF Bedroom (top loading) 0x03 Living room (top mounted) of orders 0x03 0x02 0x04 Reporting Office (to
13 Sleep function switch Off 0x00 0x0D On 0x01 Other 14 functions 15 Failed 0X00 Start OTA upgrade 0X08 Success 0X01 0X05 Upgrade package 16 Fixed characters 0X0F transfer 0X09 24G Bio-aware radar interface content 1 Unoccupied 00 FF FF 2 Environment status 0x05 3 01 00 FF U Some people exercise 01 01 01 4 Proactive reporting Report Motor signs radar parameters information 0X06 4Byte Float data 0x03 of 5 Someone is stationary None Approaching commands away state 0X04 0x0
24G Bio-aware radar interface content Abnormal reset 0X02 0X0F When the radar is restarted or repowered, an abnormal reset command is reported before the initialisation process begins 9 and a successful Initialisation successful 0X0F 0X0A initialisation command is reported. This means that the radar has been initialized successfully. Start of normal operations.
24G Bio-aware radar interface content When large movements of the person occur, Movement abnormalities 0X04 abnormal movements are indicated, informing the user that large movements may affect the radar's detection of breathing Shortness of breath abnormal 0X05 2 Out of bed 0X00 3 In/out of bed 0x07 Scenario 4 assessment 5 0x03 assessment 7 wakefulness Duration parameter 0x04 Sleep switch off shows none Light sleep 0x01 Deep sleep 0x02 None 0x03 Duration of 8 None 0x02 Awake 0x00 Sleep stat
24G Bio-aware radar interface content Sleep 9 quality Sleep quality 1Byte integer parameter score 0x01 data Heart rate 1Byte integer value 0x01 data 0x05 Heart rate parameter 0x06 Unit times/min Description. 1. The read/write command is for the upper computer to send commands to the radar. 2） The report command is for the radar to send information to the upper computer.
Appendix 2: Analysis codes for motor sign parameters
Historical version update notes Revision Release Data Summary V1.0_0212 2020/02/12 First draft V1.1_0319 2021/03/19 Readjustment V1.2_0628 2021/6/28 V1.3_0906 2021/9/06 Human sensitivity revised from 0-9 to 1-10 V1.5_0210 2022/2/10 Add initialization success command protocol V1.6_0221 2-22/2/21 Adding a forced entry unmanned gear protocol Add Human sensitivity explained and fall sensitivity explained Addition of a "none" protocol in the entry and V1.
