I. Product Features.
1.24 GHz ISM band
2.Integrated intelligent millimetre wave radar chip and intelligent algorithm firmware
3.Precise motion target positioning and tracking
4.Maximum detection distance 6m
5.Wall mounting
6... Multiple connection methods, with pin and socket interface
II. Product Description.
Motion target tracking refers to real-time tracking of the location of a moving target in an area, to achieve distance measurement, angle measurement and speed measurement of the moving target in the area.LD2450 is a motion target tracking sensor module in HELENKO's 24G millimetre wave radar series, which contains a very simplified 24 GHz radar sensor hardware and intelligent algorithm firmware. This solution is mainly applied in common indoor scenarios such as home, office and hotel to achieve the positioning and tracking of moving human body. The sensor hardware consists of an AloT millimetre-wave radar chip, a high-performance-transmit-two-receive microstrip antenna and a low-cost MCU and peripheral auxiliary circuits. Intelligent algorithm firmware adopts FMCW waveform and radar chip proprietary advanced signal processing technology. Support serial port output detection data, plug and play, can be flexibly applied to different intelligent scenes and terminal products.
III. Performance and electrical parameters.
Working frequency band: 24GHz~ 24.25GHz
Power supply requirements: DC 5V, power supply capacity > 200mA
Average operating current: 120 mA
Modulation mode: FMCW
Interface: One UART
Target application: Detection and tracking of up to three targets
Detection distance: 6m
Detection angle: 60°.
Data refresh rate: 10Hz
Sweep Bandwidth: 250MHz
Ambient Temperature: -40 ~ 85°C
Overall Dimension: 15mm x 44 mm
IV. Solution Advantage.
LD2450 human body sensing module adopts 24GHz millimetre wave radar sensor technology, compared with other solutions, it has obvious advantages in human body sensing applications.
1. In addition to sensitive to the movement of human body sensing, for the traditional programme can not identify the micro-movement of the human body can also be sensitive to sense.
2. Good environmental adaptability, sensing effect is not affected by temperature, brightness, humidity and light fluctuations in the surrounding environment.
3. Good shell penetrability, can be hidden in the shell inside the work, without the need to open holes in the product surface, improving the aesthetics of the product.
V. Application Scenario.
LD2450 motion target tracking sensor can accurately locate and track the target, widely used in various AloT scenarios, covering the following types.
Smart Home.
Sensing the distance and angle of the human body, reporting the detection results for the main control module to intelligently control the operation of air conditioning, fans and other home appliances.
Smart Business.
Position sensing, recognising the human body's proximity or distance within the set position interval, and lighting up or turning off the screen in time.
Bathroom.
Intelligent Toilet: Accurately control the automatic opening and closing of the toilet lid; Intelligent Lighting.
Intelligent Lighting.
Recognise and sense the human body, precise position detection, can be used for home lighting equipment (sensor lamps, table lamps, etc.).
VI. Use and configuration.
LD2450 module directly through the serial port in accordance with the prescribed protocol for the detection results of the data output, the serial port output data contains up to three target position and speed and other information, the user can be flexible according to the specific application scenarios. The power supply voltage of the module is 5V, and the power supply capacity of the input power supply is more than 200mA. The IO output level of the module is 3.3V. The default baud rate of the serial port is 256000, with 1 stop bit and no parity bit.
VII. Communication protocol.
This communication protocol is mainly for the users who need to separate from the upper computer demonstration tool for secondary development. the LD2450 module communicates with the outside world through the serial port, the default baud rate of the radar serial port is 256000, 1 stop bit, no parity bit. The radar outputs the detected target information, including the x-coordinate, y-coordinate in the area, and the velocity value of the target. It reports 10 frames per second.
Installation and Detection Range The typical installation method of LD2450 is wall mounting, as shown in Fig. 5, the farthest positioning and tracking distance is 6 m. The wall mounting needs to take into account the obstruction in the application scenario as well as the interfering objects on the top, and the recommended mounting height ranges from 1.5 to 2 m. The installation height is 1.5 to 2 m, which is the same as that of LD2450.
VIII. Installation Instructions :
Confirm the minimum installation clearance If the radar needs to be installed with an enclosure, the enclosure must have good wave-transparent characteristics at 24GHz, and must not contain metal materials or materials that have a shielding effect on electromagnetic waves.
Installation Environmental Requirements.
This product needs to be installed in a suitable environment, if used in the following environment, the detection effect will be affected
1. In the sensing area, there are non-human objects with continuous movement, such as animals, continuously swinging curtains, large plants facing the air outlet, etc.
2. There is a large area of strong reflective material in the sensing area, and the strong reflective material will cause interference to the radar antenna.
3. When wall-mounted, you need to consider the top of the room air conditioning, electric fans and other external interference factors.
IX. Precautions for installation.
1. Try to ensure that the radar antenna is facing the area to be detected, and the antenna is surrounded by open and unobstructed.
2. To ensure that the sensor is installed in a firm and stable position, the radar itself will affect the detection effect of the shaking
3. To ensure that the back of the radar will not have object movement or vibration. As the radar wave has penetrating, antenna signal back flap may detect the movement of the back of the radar objects. Metal shield or metal back plate can be used to shield the back flap of the radar to reduce the impact of objects on the back of the radar.
4. When more than one 24 GHz band radar exists, please do not install it in the direction of the beam, and install it as far away as possible to avoid possible mutual interference.
X. Package Includes.
Package I:
Sensor x1
Package II:
Sensor x1
4PIN cable x1
Package three:
Sensor x1
4PIN cable x1
Antenna x1
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