Instruction Manual

IR24VDA
www.iflabel.com
17／18
7. Precautions
7.1. Start Time
When the module starts to work when it is initially powered on, it is
necessary to completely reset the internal circuit of the module and fully
evaluate the environmental noise to ensure the normal operation of the module.
Therefore, when the module is initially powered on, it needs a startup stability
time of ≥30s to ensure the validity of subsequent output parameters.
7.2. Effective Detection Range
The detection range of the radar module is greatly related to the target
RCS and environmental factors. The effective detection range may change with
changes in the environment and the target. This module does not have a ranging
function for the time being, so it is normal for the effective detection range to
fluctuate within a certain range.
7.3. Radar Biological Detection Performance
Because human biological characteristics belong to ultra-low frequency
band weak reflection characteristic signals, radar processing requires a relatively
long cumulative processing. During the cumulative process, many factors may
affect the radar parameters, so occasional detection failure is normal.
7.4. Power Supply
The radar module requires higher power quality than conventional low
frequency circuits. When powering the module, it is required that the power
supply has no threshold glitches or ripples and that it effectively shields the
power supply noise caused by accessory equipment.
The radar module needs to be well grounded. Due to the ground noise
brought by other circuits, the performance of the radar module may even
be reduced or even work abnormally; the most common cause is a shorter
detection distance or an increased false alarm rate.
In order to ensure the normal operation of the VCO circuit inside the module,
the power supply requirement for this module is + 5V- + 6V power supply,
voltage ripple≤50mV.
The external power supply must provide sufficient current output capability
and transient response capability
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