MR24HPB1 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 .............................
MR24HPB1 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.
MR24HPB1 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.
MR24HPB1 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.
MR24HPB1 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.
MR24HPB1 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.
MR24HPB1 6. Functions in detail 6.1. Function point descriptions Functions Status change time/function explanation DP1: occupied/unoccupied No one to occupied, report within 0.5s Manned to unoccupied, no status output in 1-2 minutes or so DP2: Some people are stationary / Some Static dynamic switching, reporting within people are active 0.
MR24HPB1 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 moves Rapid body movement 7.
MR24HPB1 8. Communication commands and parameter definitions 8.1 Definition and description of the frame structure A. Frame structure definition Starting Length of data Code 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 B. Description of the frame structure a. Start code: 1 Byte, fixed to 0X55. b.
MR24HPB1 f. Checksum: 2 Byte, low byte before, high byte after. CRC16 checksum is used, see Appendix 1 for reference code. 8.2.
MR24HPB1 24G Bio-aware radar interface content Function Address Address code Code code 1 2 Data Notes sensitive it is System copy order parameters 0x02 0x04 Default mode 0x00 Area detection (top loading) 0x01 Bathroom (top mounted) 0x02 Scene setting 0x10 Bedroom (top loading) 0x03 Living room (top mounted) 0x04 Office (top loading) 0x05 Hotel (top loading) 0x06 Other functions Reboot 0x04 0x05 Device ID 17 0x01 Software 18 Reporting 19 module identification 20 0x01 27 Report radar
MR24HPB1 24G Bio-aware radar interface content Function Address Address code Code code 1 2 information status 0x05 28 0x03 Data Someone is stationary 01 00 FF Some people exercise 29 01 01 01 Signs 30 parameters 4 Byte Float data (see appendix 2) Passive 0x06 reporting Threshold Current gear value of orders gear 0x0C (0x01~0x0a) 0x03 Default mode 0x00 Area detection (top loading) 0x01 Bathroom (top Reporting mounted) 0x02 system information Scene setting 0x04 0x10 Bedroom (t
MR24HPB1 24G Bio-aware radar interface content Function Address Address code Code code 1 2 Report radar 34 Proactive Notes 01 01 01 information Motor signs 0x03 parameters reporting Data 4 Byte Float data 0x06 of None commands 0x04 Approaching away state 0x07 0x01 Fixed character Close to 0x01 0x02 Stay 0x01 away 0x03 Unoccupied 00 FF FF Someone is Report other information Heartbeat stationary Pack 0x01 01 00 FF Some people exercise 0x05 01 01 01 Abnormal reset 0x02 0x0
MR24HPB1 3) Fall sensitivity is 1~10, default is 4, the higher the level, the more sensitive it is.
MR24HPB1 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.
MR24HPB1 59. 60. 61. 62. 63. 64. 65. 66. 67.
MR24HPB1 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.
MR24HPB1 Historical version update notes Revision Release Data Summary V1.0_0212 2020/02/12 First draft V1.1_0319 2021/03/19 Readjustment V1.3_0628 2021/6/28 V1.