MR24FDB1 CONTENTS Overview ..................................................................................................................... 2 1. Principle of operation ........................................................................................... 2 2. Hardware Design Considerations....................................................................... 3 2.1. The power supply can be designed with the following circuit in mind .. 3 2.2. using the wiring diagram .............................
MR24FDB1 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.
MR24FDB1 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.
MR24FDB1 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.
MR24FDB1 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 the radar sensor, please wear anti-static gloves if possible. 5. Functional disturbances 5.
MR24FDB1 As the radar measures micro-movements, the sensitivity is very high and this interference cannot be excluded. F. Power supply interference, resulting in occasional false alarms. Try to keep the power supply current stable and reduce ripple. 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.
MR24FDB1 6. Functions in detail 6.1. Function point descriptions Functions Status change time/function explanation No one to occupied, report within 0.5s DP1: occupied/unoccupied Manned to unoccupied, no status output in 1-2 minutes or so DP2: Some people are stationary / Some Static dynamic switching, reporting people are active within 0.
MR24FDB1 Functions Status change time/function explanation Two level judgement "suspected fall", "fall alarm" Suspected fall - target fall DP10: Fallen state detected Output status Fall alarm alarm reported after time T is stationary Default 3 minutes, divided into 1-30 DP11: fall alarm reporting time T minute setting steps DP12: Stationary dwell alarms Reported in four time grades 6.2.
MR24FDB1 7. Description of the agreement This protocol is used to communicate between a 24G millimetre wave sleep detection radar and a host computer. This protocol outlines the radar workflow, provides a brief introduction to the interface protocol component architecture and gives the control commands and data required for the operation of the relevant radar, with the serial communication defined as follows.
MR24FDB1 Length = Data Length + Function Code + Address Code 1 + Address Code 2 + Data + Checksum. c. Function code: 1 Byte Read command: 0X01 Write command: 0X02 Passive report command: 0X03 Active report command: 0X04 d. Address code: Address code 1 indicates the function classification, address code 2 indicates the specific function. See the description of address assignment and data information. e. Data: n Byte f. Checksum: 2 Byte, low byte before, high byte after.
MR24FDB1 24G Bio-aware radar interface content Function Code 5 Read command 0x01 Address code 1 Address code 2 status 0x05 Information Search 0x03 7 System Signs parameters 0x06 Threshold gear parameter search 0x04 8 0x0C Scene setting 0x10 Fall function 9 switch 0X0B Other information enquiries 0X05 10 Notes Environmental Radar 6 Data Enquiry Current fall function switch status Fall alarm time Enquiry Current query 0X0C fall alarm time Fall sensitivity Enquiry Current query 0X0E
MR24FDB1 24G Bio-aware radar interface content Function Address Address Code code 1 code 2 Data Default mode 2 3 System 0x00 parameters Area detection 0x04 (top loading) 0x01 Bathroom (top 4 mounted) 0x02 5 Scene Bedroom (top setting 0x10 loading) 0x03 Living room (top mounted) 6 0x04 Office (top 7 loading) 0x05 Hotel (top 8 loading) 0x06 Reboot 9 10 0x04 Fall copy order function 0x02 switch 0x0B Off 0x00 On 0x01 1min 0X00 2min 0X01 3min 0X02 Fall alarm 4min 0X03 time 0X
MR24FDB1 24G Bio-aware radar interface content Function Address Address Code code 1 code 2 Data Notes 7min 0X06 10min 0X07 15min 0X08 30min 0X09 0X01 1st gear 0X02 2nd gear 0X03 3rd gear Fall Other 0X04 4th gear The lower the gear, 0X05 5th gear the less sensitive it setting 0X06 6th gear is.
MR24FDB1 24G Bio-aware radar interface content Function Address Address Code code 1 code 2 Data transfer + 0X09 Packet Notes (1024byte) End of upgrade 13 information 0X0A Fixed characters 0X0F 24G Bio-aware radar interface content Function Address Code code 1 1 2 3 4 Passive Reporting reporting module of orders identification 0x03 0x01 Address code 2 Data Device ID 0x01 12 Byte data Software version 0x02 Hardware version 0x03 Protocol version 0x04 14 10 Byte data 8 Byt
MR24FDB1 24G Bio-aware radar interface content Function Address Address Code code 1 code 2 Data 1 2 3 Notes Unoccupied 00 FF FF Environme Someone is stationary Passive Report nt status 01 00 FF reporting radar 0x05 Some people exercise of orders information 0x03 0x03 01 01 01 Signs parameters 4 0x06 4 Byte Float data (see appendix 2) 24G Bio-aware radar interface content Function Address Address Code code 1 code 2 1 Data Threshold Current gear value gear 0x0C (0x01~0x
MR24FDB1 24G Bio-aware radar interface content Function Address Code code 1 1 Address code 2 Data Feedback OTA Failure 0X00 Upgrade Start 2 0X08 Feedback OTA transmission 0X09 3 Success 0X01 Fixed characters 0X0F Fall function switch Off 0X00 0X0B On 0X01 1min 0X00 2min 0X01 3min 0X02 4min 0X03 Passive Report Fall alarm time 5min 0X04 reporting additional 0X0C 6min 0X05 of orders information 0x03 0X05 7min 0X06 10min 0X07 15min 0X08 4 30min 0X09 0X01 1st gear 0X02 2nd gear 0
MR24FDB1 24G Bio-aware radar interface content Function Address Code code 1 Address code 2 Data Notes 0X09 9th gear 0X0a 10th gear 24G Bio-aware radar interface content Function Address Address Code code 1 code 2 Data Notes The OTA will report Reporting 1 module Software identification Version 0X02 once when the upgrade is 0X01 completed/ repowered 3 Unoccupied Proactive 00 FF FF reporting Someone is of 4 3 commands Environment stationary 0x04 status 0x05 01 00 FF Repo
MR24FDB1 24G Bio-aware radar interface content Function Address Address Code code 1 code 2 Data Notes None 5 0x01 Approaching 6 away state 0x07 Fixed Close character to 0x01 0x02 0x01 Stay away 7 0x03 Unoccupied 00 FF FF Someone is Report other information Heartbeat stationary Pack 0x01 01 00 FF Some people 0x05 exercise 01 01 01 Abnormal reset 0x02 18 0x0F
MR24FDB1 24G Bio-aware radar interface content Function Address Address Code code 1 code 2 Data Suspected fall 0x00 Fall alarm 1 Real falls 0x01 0x01 No falls 0x02 Fall radar data reporting 2 None 0x00 Alarm 0x01 0x06 Notes Dwell First time 0X01 alarm Second 0x02 0X02 Third 0X03 Alarm time points: 5min/10min/30 min/ 60min Fourth 0X04 Description. 1） The read/write command is for the upper computer to send commands to the radar.
MR24FDB1 Appendix 1: CRC check digit reference parsing codes 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. 33. 34. 35. 36. 37. 38. 39. 40. 41. 42. 43. 44. 45. 46. 47. 48. 49. 50. 51. 52. 53. 54. 55. 56. 57. 58.
MR24FDB1 59. 60. 61. 62. 63. 64. 65. 66. 67.
MR24FDB1 Appendix 2: Analysis codes for motor sign parameters 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. typedef union { unsigned char Byte[4]; float Float; }Float_Byte; void main() { Float_Byte fb; fb.Byte[0] = 0x9A; fb.Byte[1] = 0xFB; fb.Byte[2] = 0xE7; fb.Byte[3] = 0x3F; printf("%f\ r\ n",fb.
MR24FDB1 Historical version update notes Revision Release Summary Data V1.0_0212 2020/02/12 First draft V1.1_0319 2021/03/19 Readjustment V1.2_0528 2021/5/28 Plus fall sensitivity adjustment V1.3_0628 2021/6/28 Add Human sensitivity explained and fall sensitivity explained V1.
