Pin P3: Adjust the induction time: floating or pulling up time is 2S, pulling down time is 15S Adjust the sensing distance Pin P2: P2 is suspended or pulled up for a long distance, and pulled down for a long distance Resistance th0: Induction distance decreases when welding 0Ω Resistance th1: The distance increases when not welding Resistance th2: 16 kinds of distance combinations adjustable
Description
Low Power 5.8G Proximity Microwave Doppler Radar Sensor Infrared Microwave Sensor for Human Detection MG58520
Product Description
This module adopts the Doppler effect, which can detect moving objects in real time, and convert the microwave induction signal into high and low level signals, or output as PWM signals. The module has many advantages such as strong anti-interference, high stability, high sensitivity, strong environmental adaptability, penetrability, wide sensing angle, no dead angle, etc. It is an ideal replacement for infrared induction (PIR pyroelectric) and voice control induction product.
Feature
1. Batch frequency stability (fixed frequency): 5.8GHz±75MHz 2. Working voltage: 2.8V-12V (default 2.8V-4.8V) 3. Output 2.2V TTL high and low level signal 4. Ultra-long sensing distance and adjustable: the front is greater than 12 meters, the factory default setting is 8m 5. The delay time after the induction trigger is adjustable (default 3S) 6. Support light intensity sensor (default is not light sensitive) 7. Fully comply with international wireless certification standards such as FCC/CE/RS and my country's SRRC certification standards 8. Small size: 20mm×20mm×2.5mm [width×length×thickness]
Ultra low power consumption
This is an ultra-low-power 5.8G microwave radar module with a working current of only 68uA. It combines the high performance of microwave induction and the super cost-effectiveness of infrared induction. It can perfectly replace infrared pyroelectric induction, make up for the lack of infrared induction, and improve the product performance. Because of its extremely low power consumption, it is very suitable for applications with low power consumption, such as solar sensor lights, alarms and other batteries or solar powered products and products that require low power consumption.
Specification
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item
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value
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Transmit frequency
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5725~5875MHz, Typ5800MHz
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Transmit power
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0.2~0.5mW, Typ 0.2mW
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Input voltage
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2.8~4.8V, Typ3.6V, LDO not attached / 5-12V LDO attached
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Output high level
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2.2V
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Output low level
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0V
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Working current
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68~75mA, Typ 68mA
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Sensing distance
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4~12M, related to sensitivity and hanging height
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Delay time
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15S, adjustable according to specific needs
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Photosensitive threshold
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10Lux, adjustable according to specific needs
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Operating temperature
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-30~85℃
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Installation Instructions
Adjust the sensing distance and time
Method 1: Modify the software; technically modified by our company to meet the needs of personalized customization; Method 2: Adjust the hardware, the details are as follows:
Pin description
1. Vin, the positive pole of the power supply, the default is not attached to the LDO, it can be directly powered by lithium batteries or dry batteries (2.8V-4.8V), when the LDO is attached, the power supply voltage can reach 5-12V 2. GND, power ground 3. OUT, sensor output, the output signal is high and low level (2.2V/0V) 4. P2, GPIO, receiving gain gear selection 5. P3, GPIO, delay time gear selection
Precautions
1. Does the power supply voltage of the microwave/radar module match, what is the driving capability, and the power ripple? The low supply voltage affects the signal amplitude, making the sensing distance shorter; Insufficient drive capability or large ripple makes the noise larger and affects signal output The default voltage of the module is 2.8-4.8V. If the auxiliary power supply voltage is >4.8V, an external LDO is required to stabilize the voltage to within 4.8V; The working current is about 68uA, and the auxiliary power supply must have sufficient driving capability; Low frequency (<200Hz) ripple requirements <50mV, high frequency (>500Hz) ripple requirements <500mV. 2. The power frequency of the power supply is a strong noise to the radar, and the influence of the power frequency should be avoided as much as possible The rectifier bridge driven by the power supply has a frequency mixing effect, and the power frequency signal is easy to alias to the radar signal. Make sure to keep the radar module away from the rectifier bridge loop. The software and hardware can be processed as follows: a. For bulbs, T8 and other products that are integrated with power drive and radar modules, place the rectifier circuit away from the radar when designing the power supply, and shield the overall structure design; b. The software has dealt with the power frequency accordingly, which can greatly reduce the impact of power frequency, but the power frequency of different countries is different. For exported products, the software version of the module may need to be differentiated. 3. The microwave/radar sensor module uses the Doppler principle to detect moving objects and take corresponding actions. Try to avoid installing radar sensor products in areas such as air conditioning outlets to avoid vibration affecting the sensing effect; 4. The antenna of the microwave/radar sensor module is directional, and the front sensor is the most sensitive 5. Microwave signals will be strongly reflected when they encounter metal, which will introduce additional noise to the radar. In addition, metal will also change the radiation characteristics of the antenna, which will change the sensing distance. Therefore, pay special attention to the following three points when installing the module: a. The front of the antenna must not be covered by metal shells or parts, and plastic or wood is allowed, but the shelter should not be close to the front of the antenna; b. Try to avoid directing the radar antenna to large metal equipment or pipes, etc. c. Avoid deep embedding radar sensing products in metal barrels or metal cavities; 6. The sensing distance is measured under certain test conditions. The actual sensing distance is related to the height of the whole lamp, the openness of the test site, the size of the tester, and the direction of the pace; 7. When installing the finished product, try to ensure that the distance between the radar sensor lights is not less than 1m; 8. Microwave induction radar has a certain internal force through the wall. It can penetrate and sense thin wooden walls and glass walls, but it is generally not easy to penetrate and sense solid brick walls; 9. Wireless products such as wifi routers may interfere with radar products. Avoid placing radar products close to wifi routers, etc., and the distance should be greater than 20cm. For products that integrate radar sensors and IoT modules (BT/wifi/NB, etc.) The form requires certain processing on the overall software. 10. Introduction to the concept of induction delay time: Delay time refers to the duration of the output high level when there is induction. This time can be triggered repeatedly. It is timed from the last induction as the starting point. For example, the set parameter is the induction delay time of 3S. When a moving object is sensed, the output is high, and the output is low at ordinary times. When a moving object is sensed, the module outputs a 3S high level. If the moving object is not sensed again within this 3S, the module output is low. When the moving object is sensed for the second time, it will re-timing for 3S with the second sense as the starting point, and so on until the Nth sense is sensed, that is, taking the last sense as the starting point for timing.
Details Images