MR24FDB1 Product features • Stationary body detection • Vital signs detection • 24GHz millimetre wave radar sensor • Realisation of the radar scanning area person sensing function based on Doppler radar technology. • Simultaneous sensing of moving and stationary persons • Maximum distance for motion sensing: ≤ 12 m • Maximum distance for micro-motion sensing: ≤ 5 m • Maximum distance for human body sensing: ≤ 3 m • Maximum distance for fall detection: ≤1.
MR24FDB1 • Office energy saving (air conditioning, lighting) • Sleep monitoring (sleep profiles) • Home security • Automatic doors, lifts, etc. Fall detection applications Fall alarm detection in slippery areas with potential fall hazards such as kitchens and bathrooms Product Packaging Volume: ≤ 35MM x 30MM x 5MM Interface: PITCH 2.
MR24FDB1 CONTENTS 1. Overview ............................................................................................................. 5 2. Electrical characteristics and parameters .................................................... 6 2.1. detection angle and distance ............................................................................... 6 2.2. electrical characteristics ...................................................................................... 7 2.3. RF Performance ............
MR24FDB1 1. Overview The MR24FDB1 radar module is a radar detection module for human motion sensing and human bio-awareness using millimetre wave radar technology. The module is based on an enhanced Doppler radar signal processing mechanism, which enables the wireless sensing and reporting of the presence and fall status of a person in a specific location through the simultaneous sensing of the Doppler parameters of the person's movement and the physiological parameters of the person.
MR24FDB1 • The module effectively rejects interference from non-living objects and also enables detection of non-living moving objects. • Product support for secondary development, adapted to a variety of scenarios applications. • Universal UART communication interface, providing a common protocol 4 groups of I\O are reserved for user-defined input and output, or simple interface simulation • The output power is low, no harm to human body.
MR24FDB1 2.2. electrical characteristics Minimum Typical Maximum value values value Operating voltage (VCC) 4.5 5.0 6 V Operating current (ICC) 90 93 100 mA - 8 20 mA -20 - +60 ℃ -40 - +80 ℃ Operating parameters Operating I\O Inflow/Output Current (IIO) Operating temperature (TOP) Storage temperature (TST) Unit 2.3. RF Performance Launching parameters Operating frequency (fTX) 24.0 - 24.
MR24FDB1 3. Module dimensions and pin description 3.1. Module size package Fig.
MR24FDB1 3.2. pin descriptions Interface Interface 1 Interface 2 Pins Description Typical values 5.0V Description 1 5V Positive power input 2 GND Ground 3 RX Serial port reception 4 TX Serial port send 5 S1 3.3V/0V occupied/unoccupied 6 S2 3.3V.0V Stationary / Active 1 3V3 3.3V Output power 2 GND Ground 3 SL Reserved 4 SD Reserved 5 GP1 Spare expansion pins 6 GP2 Spare expansion pins 7 GP3 Spare expansion pins 8 GP4 Spare expansion pins Notes 1.
MR24FDB1 3.3. using the wiring diagram Fig. 2 Schematic diagram of the radar module and peripheral connections 4. Main operating performance 4.1 Radar module operating range The MR24FDB1 radar module beam coverage is shown in Figure 3. The radar coverage is a three-dimensional sector of 90° horizontally and 60° tilted. Fig.
MR24FDB1 Due to the radar beam characteristics, the radar has a relatively long range in the direction normal to the antenna face, but a shorter range if it deviates from the antenna normal. When the radar is mounted on top or at an angle, the radar beam range and the effective radiation space will reduce the radar range, which needs to be taken into account when using the radar. 4.2. main functions and performance The main functions of this radar module include A.
MR24FDB1 5. works and installation 5.1. installation methods The recommended mounting options for this radar module include horizontal, tilt and overhead mounting. (When the fall function is required, the installation method can only be selected for overhead mounting, and the installation is only suitable for slippery areas such as kitchens and bathrooms where there is a risk of falling.) 5.1.1. top-mounted installation The installation is shown in Fig. 4 as an overhead installation.
MR24FDB1 5.1.2. Horizontal installation As shown in Figure 4, this installation method is mainly orthogonal to human detection in a standing or sitting position, such as living rooms, home appliance applications and other occasions. The radar is recommended to be installed at a height of 1 m to 1.5 m. The radar is installed horizontally in a positive direction, with an installation angle of ≤ ±5o and no obvious obstructions or coverings directly in front of the radar.
MR24FDB1 The radar normal direction is aligned with the main detection location to ensure that the main beam of the radar antenna covers the detection area and that the radar beam covers the human activity airspace. In this installation mode, the maximum distance for the detection of moving bodies is L3 ≈ 7 m; the maximum distance for the detection of seated bodies/micro movements is L2 ≈ 4 m and the maximum distance for the detection of sleeping bodies is L1 ≈ 3 m.
MR24FDB1 E. For stationary human detection, different body positions will have an impact on the radar range, and the radar does not guarantee the maximum range in all states. 5.2 Radar module operating modes The radar module provides a comprehensive assessment of the current status of people in the detection area after statistical analysis and processing, and the user can make direct use of the results.
MR24FDB1 reports the fall status alarm in real time, the main states include. 4. Judgement of suspected fall status. 5. Judgement of fall status. 6. Long stay alarm status judgement. In the fall detection mode, the radar module needs to be installed on top of the roof, at a height of ≤ 2.75m, in slippery and potentially fallprone situations such as kitchens and bathrooms, in order to detect the accuracy of the judgement. 6.
MR24FDB1 • Smart air conditioners • Other smart home appliances 6.2. home applications For places such as homes, hotels, offices and bathrooms, there is a need for real-time detection of whether people are entering or whether people are moving in the place, thus enabling ways such as security, electrical control, personnel monitoring, etc. and being able to effectively avoid privacy issues.
MR24FDB1 6.4. energy saving control applications Based on this radar motion target detection and biometric detection, the radar can have better applications in energy saving control, the main application modes are as follows. • Home appliance energy saving • Energy saving control of office appliances • Street lighting energy saving control 6.5.
MR24FDB1 7.3 Radar biodetection performance As human biometric features are ultra-low frequency, weakly reflective signals, radar processing requires a relatively long period of cumulative processing, and many factors may affect the radar parameters during the cumulative process, so occasional detection failures are normal. 7.4. power supply Radar modules require higher quality power supplies than conventional low frequency circuits.
MR24FDB1 to be planned at the angle of installation. Non-interference factors: Radar electromagnetic waves can penetrate human clothing, curtains, thin wooden panels, glass. Depending on the application, the installation angle and performance of the radar needs to be determined. Semi-interference factors: Radar determines the presence of the human body and is not suitable for direct exposure to air conditioners. Internal motors in air conditioners can cause radar miscalculations.
MR24FDB1 11. Historical version update notes Revision Release Data Summary V1.0_1012 2020/10/12 First draft V1.1_1126 2020/11/26 Added close to away and scene modes V1.2_1209 2020/12/9 Take the proximity away from the ambient state 1: added the heartbeat packet specific environment parameter to 2: modified the V1.3_1214 2020/12/14 fixed character near the away from parameter to 0x01 0x01 3: Modified the interval definition of the motion sign parameter V1.4_0106 2021/1/6 V1.
