24G millimeter wave radar sensor PIR module HLK-LD112-24G motion monitoring low power consumption and small size
product manual
The HLK-LD112-24G IoT microwave radar module can be used to detect moving targets in a small range and output information such as its distance, and is not affected by the installation environment. It can automatically filter various debris in the environment, such as tables, Mop etc.
HLK-LD112-24G has industry-leading superior performance, small size, low cost, low power consumption advantages, can provide customers with ideal, better performance object movement monitoring solutions.
The HLK-LD112-24G IoT microwave radar module can be used to detect moving targets in a small range and output information such as its distance, and is not affected by the installation environment. It can automatically filter various debris in the environment, such as tables, Mop etc.
HLK-LD112-24G has industry-leading superior performance, small size, low cost, low power consumption advantages, can provide customers with ideal, better performance object movement monitoring solutions.
|Product Features
-TX frequency range: 24～24.25GHz
-TXEIRP: 9dBm
-Phase noise: -96dBc/Hz@1MHz offset
-RX noise figure: 10 dB DSB
-5V power supply current: 55mA
-Small size: 22.95mm×20mm
-TX frequency range: 24～24.25GHz
-TXEIRP: 9dBm
-Phase noise: -96dBc/Hz@1MHz offset
-RX noise figure: 10 dB DSB
-5V power supply current: 55mA
-Small size: 22.95mm×20mm
Connection instructions
The pins are connected by 2.54MM1×3 pin connectors.
The pins are connected by 2.54MM1×3 pin connectors.
Parameter debugging method
*VO: detection level output. Detects the movement of a person or object and outputs a high level for approximately 1 second. Low level when no object is moving.
*GND: ground.
*VCC: power supply. The version with LDO is powered by a 5V power supply.
1-1. Sensitivity debugging method AA1. Current sensitivity magnification
=(R12/R11)*(R13/R6)=(1M/20K)*(1M/10K)=5000 times. Considering that some shell materials have greater attenuation of electromagnetic waves, the default sensitivity is 5000 times, which is a relatively sensitive value. The sensitivity can be modified according to the actual application scenario.
A2. If you need to reduce the sensitivity, it is recommended to directly change the resistance of R11 and increase the resistance of R11. For example, if it needs to be modified to 2000 times, then just change R11 to 50K.
*VO: detection level output. Detects the movement of a person or object and outputs a high level for approximately 1 second. Low level when no object is moving.
*GND: ground.
*VCC: power supply. The version with LDO is powered by a 5V power supply.
1-1. Sensitivity debugging method AA1. Current sensitivity magnification
=(R12/R11)*(R13/R6)=(1M/20K)*(1M/10K)=5000 times. Considering that some shell materials have greater attenuation of electromagnetic waves, the default sensitivity is 5000 times, which is a relatively sensitive value. The sensitivity can be modified according to the actual application scenario.
A2. If you need to reduce the sensitivity, it is recommended to directly change the resistance of R11 and increase the resistance of R11. For example, if it needs to be modified to 2000 times, then just change R11 to 50K.
1-2. Sensitivity debugging method B reduces the capacitance values of C4 and C6, which can change the link bandpass characteristics and increase the high-pass cutoff frequency, so that the module will be insensitive to some small movements, and the module will be more stable and not easy to trigger. At the same time, the startup time of module power-on initialization can also be greatly reduced. The suggestion can be changed to 2.2UF or 1UF. The specific effect can be adjusted according to the actual situation. The side effect is that the sensing distance will be reduced by about 20%.
A1. Blocking time refers to the time after the detection is completed and the output level returns to 0 level until the next detection takes effect. This time can be adjusted by changing the resistance of R8.
A2. The current block time is about 0.8 seconds, corresponding to R8=39K. It is not recommended to turn down.
Too small blocking time will cause the module to be easily triggered by interference. An excessively large R8 will cause the module to underreport.
A2. The current block time is about 0.8 seconds, corresponding to R8=39K. It is not recommended to turn down.
Too small blocking time will cause the module to be easily triggered by interference. An excessively large R8 will cause the module to underreport.
A1. The high-level maintenance time after triggering is that after detecting a moving object, the module outputs
The holding time of 3.3V high level.
A2. The current high-level output maintenance time is about 1 second, corresponding to 14=4.7K. Refer to the table below for the reference of the output maintenance time corresponding to the value of R14.
The current module is powered by 5V, and there is LDO on the module to change 5V to 3.3V, so VD=3.3V shall prevail.
The holding time of 3.3V high level.
A2. The current high-level output maintenance time is about 1 second, corresponding to 14=4.7K. Refer to the table below for the reference of the output maintenance time corresponding to the value of R14.
The current module is powered by 5V, and there is LDO on the module to change 5V to 3.3V, so VD=3.3V shall prevail.
1.warranty period 120day
2.package included:1pc
2.package included:1pc
