YJJ GH-719 Microwave Sensing Displacement Module Utilizes Doppler Radar

Product Specification

Product Description:

YJJ GH-719 Microwave Sensing Displacement Module Utilizes Doppler Radar Principle At 10.525 GHz

Features:

GH-719 Microwave Displacement Module User Manual

The GH-719 microwave sensing displacement module is a microwave mobile object detector designed based on the Doppler Radar principle. The microwave frequency is 10.525 GHz. It can operate directly by connecting a DC power supply of 6-20V.

The signal processing of the GH-719 microwave induction displacement module is carried out using a single-chip microcomputer program, ensuring high reliability. The circuit board has 16 levels of sensitivity adjustment, and the sensing distance can be adjusted within the range of 0.3 to 10 meters. There are 4 trigger mode options, and the signal output time is 2 seconds, 3 seconds, 10 seconds, 20 seconds. With the addition of a photosensitive resistor, it can suppress daytime triggering. It is mainly applied in automatic door control and switching, industrial automation control, indoor and outdoor security prevention systems, ATM automatic withdrawal machine's automatic video control system, and outdoor safety warning and other places.

The GH-719 microwave induction displacement module is a non-contact detection type module. It has strong resistance to radio frequency interference and is not affected by temperature, humidity, light, air flow, or dust. It can be installed inside certain thicknesses of plastic, glass, wooden and other non-metallic enclosures, making it convenient for application in the control of various products or equipment.

2. Circuit Board Adjustment Instructions:

A 16-level sensitivity adjustment: There are four connection points marked as 0, 1, 2, and 3 on the circuit board.

By short-circuiting the 4 connection points as shown below, the sensitivity can be adjusted within 16 levels, allowing the detection range to be adjusted from 0.3 meters to 10 meters.

2: Four connection points have disconnected. The sensing distance is the closest, within 0.5 meters.

3: The connection point short circuit is 1, and no short circuit is 0. When all are short-circuited, the sensitivity is the highest. The adjustment is as follows:

1: 0000

2: 0001

3: 0010

4: 0011

5: 0100

6: 0101

7: 0110

8: 011

8: 1000. 9: 1001. a: 1010. b: 1011. c: 1100. d: 1101. e: 1110. f: 1111.

Four adjustment modes for B: There are two connection points marked as 4 and 5 on the circuit board.

1:00 - Irrepetitive Trigger Mode:

When a moving object is detected, a 3-second high-level signal is output and then the process stops. After a 2-second delay, the detection is repeated. If a moving object is detected again, a 2-second high-level signal is output, and this process continues in a cycle. The cycle repeats until no moving object is detected, and then the high-level signal output stops.

2:01 Repeatable trigger touch mode, with a delay time of 2 seconds:

When a moving object is detected, a 2-second high-level signal is output. During this 2-second period, the module continuously detects the object movement at a frequency of 30 times per second. If the object movement is detected again, the time will be extended by another 2 seconds until no movement of the object is detected.

The high-level signal will be delayed for 2 seconds and then stop.

3:10 Repeatable touch trigger mode, with a delay time of 10 seconds:

When a moving object is detected, a 10-second high-level signal is output. During this 10-second period, the module operates at a frequency of 30 times per second.

Continuous monitoring. If the movement of an object is detected again, the time will be further delayed by 10 seconds until no moving object is detected.

The high-level signal will be delayed for 10 seconds and then stop.

4:10 Repeatable trigger mode, with a delay time of 20 seconds:

When a moving object is detected, a 20-second high-level signal is output. During this 20-second period, the module operates at a frequency of 30 times per second.

Continuous detection. If the movement of an object is detected again, the time will be further delayed by 20 seconds until no moving object is detected.

The high-level signal will be delayed for 20 seconds before it stops.

CDS photoresistor:

By connecting the photoresistor, it can prevent the trigger from occurring during the day or in environments with bright light.

2: Trigger an effective action:

Connect a photoresistor, and it can trigger when a moving object is detected in the dark or in an environment with dim light. During the selected triggering mode period, even if the light changes from darkness to brightness, the triggering state and delay time cannot be altered until the output signal becomes a low level. Only then does the photoresistor come into effect.

Notes:

After the sensitivity and trigger mode are selected, the microcontroller needs to be powered off and reset before it can execute the new selection function.

Three. Main technical parameters:

1 Center frequency: 10.525 GHz

2 Operating voltage: DC 6V ± 20V

3 Static Current: 6mA 4 High/Low Output Levels: 5V/0V

5 3 dB antenna pattern - azimuth 80 ° 6 3 dB antenna pattern - elevation 40 °

7. Induction distance: 0.3 - 10 meters, adjustable within 16 levels. 8. Trigger mode: 4 options available.

9. Ambient temperature: -30 - 70 degrees Celsius

10. Dimensions: 45 * 37 * 18 mm

Specifications: