Manual de usuario del radar de presencia humana seeed studio MR24HPB1

Manual de usuario del radar de presencia humana seeed studio MR24HPB1

GENERAL

Este documento se centra en el uso del radar, los problemas que deben abordarse en cada 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.
The radar is a self-contained space sensing sensor, consisting of RF antenna, radar chip and high speed main frequency MCU together with a module that relies on a stable and flexible superior algorithm architecture core to solve the user’s various scenario detection needs, which can be equipped with a host computer or host computer to flexibly output detection status and data, meeting several groups of GPIOs for custom development.

1. Principle of operation]

The radar transmits a millimetre wave signal in the 24G band, the measured target reflects the electromagnetic wave signal and demodulates the transmitted signal, which is then amplified, filtered and processed by ADC to obtain the echo demodulated signal data. The amplitude, frequency and phase of the echo signal are decoded in the MCU unit, which ultimately 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

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.

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

5.1 Unoccupied state, abnormal output occupied

In normal conditions, the radar will accurately determine the presence of a sitting or sleeping body and output information on falls, breathing, vital signs etc.
A. Radar scanning area is large, doorway, boarded wall next door movement is detected. Adjustment method: reduce radar sensitivity, radar provides scene setting.
B. Radar underneath is facing a running air conditioner or fan. Adjustment method: adjust the radar position so that it is not directly in front of the air conditioner or fan.
C. Shifting objects caused by air conditioning winds. Adjustment method: cotton, non-metallic objects will not cause false alarms, metal objects need to be fixed.
D. The radar is not fixed, vibration causes false alarms. Avoid supporting shaking and vibration.
E. Occasional moving objects such as pets, birds, etc.
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. 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. False output due to metal occlusion
Excessively thick desks and chairs, metal seats. It will block the electromagnetic wave penetration and cause misinterpretation.
C. Differences in scanning angles
The radar does not scan the torso area. This can lead to false positives.
D. Radar sensitivity is too low
The radar offers parameter adjustment to increase sensitivity for improvement.

6. Functions in detail

6.1. Function point descriptions

clave	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 people are active	Static dynamic switching, reporting within 0.5 segundos
DP3: Someone close to the device / someone moving away from the device / someone moving without direction	Status output once every 2 seconds
DP4: Body movement amplitude parameter 0 – 100	Data output once every 5 seconds   Reference (description of output of body motion amplitude parameters)
DP5: Sensitivity setting 1 – 10 steps	Default scene mode, adapted to 10 positions of adjustment
DP7: Scene modes (bed, bathroom, hotel, bedroom, office, default mode)	Adapted to different scenarios according to the size of the area
DP8: No false alarm confirmation prompt

6.2. Description of the output of the body motion amplitude parameter

Movimiento corporal ampparámetros de longitud
0%	Ninguna	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. 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.\

• Interface level: TTL
• Tasa de baudios: 9600bps
• Bits de parada: 1
• Bits de datos: 8
• Paridad: ninguna

8. Communication commands and parameter definitions

8.1 Definition and description of the frame structure

A. Frame structure definition

Comience a Código	Length of data		Función los códigos de	Código de dirección 1	Dirección Código 2	Datos	Código de verificación
0X55	Longitud_L	Longitud_H	Comando	Dirección 1	Dirección 2	Datos	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. Data length: 2 Byte, low byte before, high byte after.
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.
CRC16 checksum is used, see Appendix 1 for reference code.

8.2. Description of address assignment and data information

24G Bio-aware radar interface content
	Función Código	Dirección Código 1	Código de dirección 2	Datos	Notas
1	Read command 0x01	Marking search 0x01	ID del dispositivo 0x01
2			Software version 0x02
3			Hardware version 0x03
4			Protocolo version 0x04
		Radar Information Search 0x03	Las Condiciones ambientales status 0x05
11			Signos parameters 0x06
12		System parameter search 0x04	Límite gear 0x0C
			Configuración de escena 0x10
16			Threshold gear 0x0C	Enumeration range1~10	Correspondiente a 1 2 3 4 5 6 7 8 9 10 gears (predeterminado 7) The higher the gear, the more

24G Bio-aware radar interface content
	Función Código	Dirección Código 1	Código de dirección 2	Datos	Notas
	copy order 0x02	System parameters 0x04			sensitive it is
			Scene setting 0x10	Default mode 0x00
				Area detection (top loading) 0x01
				Bathroom (top mounted) 0x02
				Bedroom (top loading) 0x03
				Living room (top mounted) 0x04
				Office (top loading) 0x05
				Hotel (top loading) 0x06
		Otros functions 0x05	Reboot 0x04
17		Reporting module identification 0x01	ID del dispositivo 0x01	12 Byte data
18			Software version 0x02	10 Byte data
19			Hardware version 0x03	8 Byte data
20			Protocolo version 0x04	8 Byte data
27		Report radar	Medioambiente	Unoccupied 00 FF FF

24G Bio-aware radar interface content
	Función Código	Dirección Código 1	Código de dirección 2	Datos	Notas
28	Passive reporting of orders 0x03	information 0x03	status 0x05	Alguien es stationary 01 00 FF
29				Some people exercise 01 01 01
30			Signs parameters 0x06	4 Byte Float data (see appendix 2)
		Reporting system information 0x04	Límite gear 0x0C	Current gear value (0x01~0x0a)
			Scene setting 0x10	Default mode 0x00
				Area detection (top loading) 0x01
				Bathroom (top mounted) 0x02
				Bedroom (top loading) 0x03
				Living room (top mounted) 0x04
				Office (top loading) 0x05
				Hotel (top loading) 0x06
31			Environment status 0x05	Unoccupied 00 FF FF
32				Someone is stationary 01 FF
33				Some people exercise

24G Bio-aware radar interface content
	Función Código	Dirección Código 1	Código de dirección 2	Datos		Notas
	Proactive reporting of commands 0x04	Report radar information 0x03		01 01 01
34			Motor signs parameters 0x06	4 Byte Float data
			Approaching away state 0x07	Fixed character 0x01 0x01	Ninguna 0x01
					Close to 0x02
					Ausentarse 0x03
		Report other information 0x05	Heartbeat Pack 0x01	Unoccupied 00 FF FF
				Someone is stationary 01 FF
				Some people exercise 01 01 01
			Anormal reset 0x02	0x0F

Descripción.

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.
3. Fall sensitivity is 1~10, default is 4, the higher the level, the more sensitive it is.

Appendix 1: CRC check digit reference parsing codes

1. const unsigned char cuc_CRCHi[256]=
2. {

3.

0 x 00,

0xC1,

0 x 81,

0 x 40,

0 x 01,

0xC0,

0 x 80,

0 x 41,

0 x 01,

0xC0,

0 x 80,

0 x 41,

4.

0 x 00,

0xC1,

0 x 81,

0 x 40,

0 x 01,

0xC0,

0 x 80,

0 x 41,

0 x 00,

0xC1,

0 x 81,

0 x 40,

5.

0 x 00,

0xC1,

0 x 81,

0 x 40,

0 x 01,

0xC0,

0 x 80,

0 x 41,

0 x 01,

0xC0,

0 x 80,

0 x 41,

6.

0 x 00,

0xC1,

0 x 81,

0 x 40,

0 x 00,

0xC1,

0 x 81,

0 x 40,

0 x 01,

0xC0,

0 x 80,

0 x 41,

7.

0 x 00,

0xC1,

0 x 81,

0 x 40,

0 x 01,

0xC0,

0 x 80,

0 x 41,

0 x 01,

0xC0,

0 x 80,

0 x 41,

8.

0 x 00,

0xC1,

0 x 81,

0 x 40,

0 x 01,

0xC0,

0 x 80,

0 x 41,

0 x 00,

0xC1,

0 x 81,

0 x 40,

9.

0 x 00,

0xC1,

0 x 81,

0 x 40,

0 x 01,

0xC0,

0 x 80,

0 x 41,

0 x 00,

0xC1,

0 x 81,

0 x 40,

10.

0 x 01,

0xC0,

0 x 80,

0 x 41,

0 x 01,

0xC0,

0 x 80,

0 x 41,

0 x 00,

0xC1,

0 x 81,

0 x 40,

11.

0 x 00,

0xC1,

0 x 81,

0 x 40,

0 x 01,

0xC0,

0 x 80,

0 x 41,

0 x 01,

0xC0,

0 x 80,

0 x 41,

12.

0 x 00,

0xC1,

0 x 81,

0 x 40,

0 x 01,

0xC0,

0 x 80,

0 x 41,

0 x 00,

0xC1,

0 x 81,

0 x 40,

13.

0 x 00,

0xC1,

0 x 81,

0 x 40,

0 x 01,

0xC0,

0 x 80,

0 x 41,

0 x 01,

0xC0,

0 x 80,

0 x 41,

14.

0 x 00,

0xC1,

0 x 81,

0 x 40,

0 x 00,

0xC1,

0 x 81,

0 x 40,

0 x 01,

0xC0,

0 x 80,

0 x 41,

15.

0 x 00,

0xC1,

0 x 81,

0 x 40,

0 x 01,

0xC0,

0 x 80,

0 x 41,

0 x 01,

0xC0,

0 x 80,

0 x 41,

16.

0 x 00,

0xC1,

0 x 81,

0 x 40,

0 x 00,

0xC1,

0 x 81,

0 x 40,

0 x 01,

0xC0,

0 x 80,

0 x 41,

17.

0 x 01,

0xC0,

0 x 80,

0 x 41,

0 x 00,

0xC1,

0 x 81,

0 x 40,

0 x 01,

0xC0,

0 x 80,

0 x 41,

18.

0 x 00,

0xC1,

0 x 81,

0 x 40,

0 x 00,

0xC1,

0 x 81,

0 x 40,

0 x 01,

0xC0,

0 x 80,

0 x 41,

19.

0 x 00,

0xC1,

0 x 81,

0 x 40,

0 x 01,

0xC0,

0 x 80,

0 x 41,

0 x 01,

0xC0,

0 x 80,

0 x 41,

20.

0 x 00,

0xC1,

0 x 81,

0 x 40,

0 x 01,

0xC0,

0 x 80,

0 x 41,

0 x 00,

0xC1,

0 x 81,

0 x 40,

21.

0 x 00,

0xC1,

0 x 81,

0 x 40,

0 x 01,

0xC0,

0 x 80,

0 x 41,

0 x 01,

0xC0,

0 x 80,

0 x 41,

22.

0 x 00,

0xC1,

0 x 81,

0 x 40,

0 x 00,

0xC1,

0 x 81,

0 x 40,

0 x 01,

0xC0,

0 x 80,

0 x 41,

23.

0 x 00,

0xC1,

0 x 81,

0 x 40,

0 x 01,

0xC0,

0 x 80,

0 x 41,

0 x 01,

0xC0,

0 x 80,

0 x 41,

24.

0 x 00,

0xC1,

0 x 81,

0x40

25. };

26. 27. const no firmado tanque cuc_CRCLo[256]=

28. {

29.

0 x 00,

0xC0,

0xC1,

0 x 01,

0xC3,

0 x 03,

0 x 02,

0xC2,

0xC6,

0 x 06,

0 x 07,

0xC7,

30.

0 x 05,

0xC5,

0xC4,

0 x 04,

0xCC,

0x0C,

0x0D,

0xCD,

0x0F,

0xCF,

0xCE,

0x0E,

31.

0x0A,

0xCA,

0xCB,

0x0B,

0xC9,

0 x 09,

0 x 08,

0xC8,

0xD8,

0 x 18,

0 x 19,

0xD9,

32.

0x1B,

0xDB,

0xDA,

0x1A,

0x1E,

0xDE,

0xDF,

0x1F,

0xDD,

0x1D,

0x1C,

0xDC,

33.

0 x 14,

0xD4,

0xD5,

0 x 15,

0xD7,

0 x 17,

0 x 16,

0xD6,

0xD2,

0 x 12,

0 x 13,

0xD3,

34.

0 x 11,

0xD1,

0xD0,

0 x 10,

0xF0,

0 x 30,

0 x 31,

0xF1,

0 x 33,

0xF3,

0xF2,

0 x 32,

35.

0 x 36,

0xF6,

0xF7,

0 x 37,

0xF5,

0 x 35,

0 x 34,

0xF4,

0x3C,

0xFC,

0xFD,

0x3D,

36.

0xFF,

0x3F,

0x3E,

0xFE,

0xFA,

0x3A,

0x3B,

0xFB,

0 x 39,

0xF9,

0xF8,

0 x 38,

37.

0 x 28,

0xE8,

0xE9,

0 x 29,

0xEB,

0x2B,

0x2A,

0xEA,

0xEE,

0x2E,

0x2F,

0xEF,

38.

0x2D,

0xED,

0xEC,

0x2C,

0xE4,

0 x 24,

0 x 25,

0xE5,

0 x 27,

0xE7,

0xE6,

0 x 26,

39.

0 x 22,

0xE2,

0xE3,

0 x 23,

0xE1,

0 x 21,

0 x 20,

0xE0,

0xA0,

0 x 60,

0 x 61,

0xA1,

40.

0 x 63,

0xA3,

0xA2,

0 x 62,

0 x 66,

0xA6,

0xA7,

0 x 67,

0xA5,

0 x 65,

0 x 64,

0xA4,

41.

0x6C,

0xAC,

0xAD,

0x6D,

0xAF,

0x6F,

0x6E,

0xAE,

0xAA,

0x6A,

0x6B,

0xAB,

42.

0 x 69,

0xA9,

0xA8,

0 x 68,

0 x 78,

0xB8,

0xB9,

0 x 79,

0xBB,

0x7B,

0x7A,

0xBA,

43.

0xBE,

0x7E,

0x7F,

0xBF,

0x7D,

0xBD,

0xBC,

0x7C,

0xB4,

0 x 74,

0 x 75,

0xB5,

44.

0 x 77,

0xB7,

0xB6,

0 x 76,

0 x 72,

0xB2,

0xB3,

0 x 73,

0xB1,

0 x 71,

0 x 70,

0xB0,

45.

0 x 50,

0 x 90,

0 x 91,

0 x 51,

0 x 93,

0 x 53,

0 x 52,

0 x 92,

0 x 96,

0 x 56,

0 x 57,

0 x 97,

46.

0 x 55,

0 x 95,

0 x 94,

0 x 54,

0x9C,

0x5C,

0x5D,

0x9D,

0x5F,

0x9F,

0x9E,

0x5E,

47.

0x5A,

0x9A,

0x9B,

0x5B,

0 x 99,

0 x 59,

0 x 58,

0 x 98,

0 x 88,

0 x 48,

0 x 49,

0 x 89,

48.

0x4B,

0x8B,

0x8A,

0x4A,

0x4E,

0x8E,

0x8F,

0x4F,

0x8D,

0x4D,

0x4C,

0x8C,

49.

0 x 44,

0 x 84,

0 x 85,

0 x 45,

0 x 87,

0 x 47,

0 x 46,

0 x 86,

0 x 82,

0 x 42,

0 x 43,

0 x 83,

50.

0 x 41,

0 x 81,

0 x 80,

0x40

51.

};

52. 53. 54. estático no firmado int corto us_CalculateCrc16(unsigned tanque *lpuc_Frame, unsigned short i nt lus_Len) 55. { 56.       unsigned tanque luc_CRCHi = 0xFF; 57.       unsigned tanque luc_CRCLo = 0xFF; 58.       int li_Index=0;

59.

60.      mientras(lus_Len–)

61.      {

62.           li_Index = luc_CRCLo ^ *( lpuc_Frame++);

63.           luc_CRCLo = (unsigned tanque)( luc_CRCHi ^ cuc_CRCHi[li_Index]);

64.           luc_CRCHi = cuc_CRCLo[li_Index];

65.      }

66.      retorno (no firmado int corto )(luc_CRCLo << 8 | luc_CRCHi);

67.}

Appendix 2: Analysis codes for motor sign parameters

unión typedef
2. {
3. unsigned char Byte[4];
4. float Float;
5. }Float_Byte;
6.
7. void main()
8. {
9. Float_Byte fb;
10. fb.Byte[0] = 0x9A;
11. fb.Byte[1] = 0xFB;
12. fb.Byte[2] = 0xE7;
13. fb.Byte[3] = 0x3F;
14. printf(“%f\ r\ n”,fb.Float);
15.}

Historical version update notes

Revisión	Release Data	Resumen
V1.0_0212	2020/02/12	Primer borrador
V1.1_0319	2021/03/19	Reajuste
V1.3_0628	2021/6/28	Add Human sensitivity explained and fall sensitivity explained
V1.4_0906	2021/9/06	Human sensitivity revised from 0-9 to 1-10

 

 

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