Perception module series: HLK-LD015-5G

5.8G radar induction sensor module

4-6 meters sensing range|distance & delay time adjustable|radar+light sensor

product manual

PRODUCT DESCRIPTION

HLK-LD012-5G is a small size 5.8G radar sensor launched by Hilink, with a size of 46mm*8mm. The module fully integrates 5.8GHz microwave circuit, intermediate frequency amplifier circuit and signal processor, with high integration and good production consistency. With a miniaturized planar antenna, the overall size is greatly reduced while ensuring the performance of the sensor. The module can be used to detect the presence of human body or various scenes induced by moving targets.

The 5 PINs are 1.27mm apart, and three PINs of VCC, GND and OUT are used by default. If parameters such as distance and delay time need to be tuned, they can be flexibly configured through the serial port RX and TX. If there is no host computer, RX and TX can be used as I /O port to adjust the parameters, the following table is the PIN pin definition description:

Technical specifications

TECHNICAL SPECIFICATIONS

Module dimensions

Schematic diagram of the module's size and pin position. The module length and width are 46mm*8mm, and the overall thickness is 2.5mm. If there are pins, the default pin height is 12mm.

Module demonstration

The parameters of the module can be modified through the host computer software or serial port tool:

Sensing time and sensing distance adjustment

In software configuration, RX and TX can be used as I/O ports or UART ports to tune module parameters. The software defaults to these two PINs as I/O ports, where TX is used to tune the sensing distance, and when TX is low level, it is sensing The distance is 4~6 meters, the sensing distance is 3~5 meters at high level; RX is used to tune the delay time, when RX is low level, the sensing delay time is 30S, when it is high level, the delay time is 2S, and the sensing is triggered again within the delay time , The timing will restart. RX and TX can also use UART port to tune the module parameters, and can also be used as serial ports.

Circuit reference

CIRCUIT REFERENCE

★The signal output by the module can be directly connected to the IO port of the MCU. The MCU program can read the status of the OUT pin of the module to determine whether there is a moving object in the sensing area, so as to achieve intelligent control.

★The high and low levels of the module output drive some switching devices to turn on, such as driving transistors, MOS tubes, relays and other switches to pull in state. As shown in the figure below, when the module detects a moving object, the pin OUT outputs a high level to drive the transistor/MOS tube to conduct, so that the back-end loads (such as lights, motors, etc.) work.

★The PWM signal that the module can output is used for dimming and speed control, as shown in the figure below. Generally, the driving IC with dimming/speed control has PWM pin input.

When a person passes by a lamp equipped with an induction module, the module outputs a signal with a duty cycle of 100%. When the person leaves for 30 seconds, the module outputs a signal with a duty cycle of 0% and the light goes out.

Module sensing range diagram

The sensing sensitivity of the module can be configured through the MCU, and its positive limit sensing distance is 6 meters, and the actual sensing distance can be adjusted as required. The above figure is a schematic diagram of the detection range of a lateral radar. If the sensitivity is set higher, the detection range will increase accordingly. The dark area in the figure is the high sensitivity area, which can be fully detected in this area, and the light color area is the low sensitivity detection area , Objects can be basically detected in this area.

Precautions

    ★When installing the antenna, avoid metal shells or components on the front of the antenna to avoid shielding the signal. Plastic or glass is allowed, but the obstruction should not be close to the front of the antenna;
★Try to avoid directing the radar antenna to large metal equipment or pipes;
★When installing multiple radar modules, try to ensure that the antennas of each radar module are parallel to each other, avoid direct illumination between the antennas, and keep a distance of more than 1m between the modules;
★The radar sensor should avoid facing the AC drive power supply, and try to stay away from the rectifier bridge of the drive power supply to avoid power frequency interference with the radar signal;
★The power supply driving capability of the radar module needs to be greater than 50mA, otherwise the sensor will work abnormally.