Hi-Link HLK-LD2410B Manual del usuario - Página 8
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5. Use and configuration
5.1 Typical application circuit
The LD2410B module directly outputs the detected target state through an IO pin (someone is
high, no one is low), and it can also output the detection result data through the serial port according
to the specified protocol. The serial port output data includes: Target status and distance auxiliary
information, etc., users can use it flexibly according to specific application scenarios.
The power supply voltage of the module is 5V, and the power supply capacity of the input
power supply is required to be greater than 200mA.
The module IO output level is 3.3V. The default baud rate of the serial port is 256000, 1 stop bit,
and no parity bit.
5.2 The role of configuration parameters
The user can modify the configuration parameters of the module through the serial port of the
LD2410B to adapt to different application requirements, and the configuration content will not be
lost when the power is turned off.
The configurable parameters include the following:
farthest detection distance
Set the farthest detectable distance, only human targets that appear within this farthest distance
will be detected and output the result.
Set in units of distance gates, and each distance gate is 0.75m.
Including the farthest door for motion detection and the farthest door for static detection, the
setting range is 1 to 8. For example, if the farthest door is set to 2, only if there is a human body
within 1.5m will it effectively detect and output the result.
Sensitivity
Only when the detected target energy value (range 0~100) is greater than the sensitivity value will
it be determined that the target exists, otherwise it will be ignored.
The sensitivity value can be set from 0 to 100. The sensitivity of each range gate can be
independently set, so that the detection in different distance ranges can be precisely adjusted, local
accurate detection or filtering of interference sources in specific areas.
In addition, if the sensitivity of a certain distance gate is set to 100, the effect of not recognizing
the target under the distance gate can be achieved. For example, if the sensitivity of distance gate 3
and distance gate 4 is set to 20, and the sensitivity of other distance gates is set to 100, it is possible
to detect only the human body within the range of 2.25-3.75m from the distance module.
no-one duration
When the radar outputs the result from man to no man, it will report man for a period of time. If
there is no man in the radar test range during this time period, the radar will report no man; if the
radar detects man during this time period, it will be refreshed again. This time, in seconds. It is
equivalent to the unmanned delay time. After the person leaves, the output state will be unmanned
only after the person has left the system for more than this duration.
HLK-LD2410B
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User manual