The reference to 37 sensors and modules has been widely circulated on the Internet. In fact, there must be more than 37 sensor modules compatible with Arduino. In view of the fact that I have accumulated some sensor and actuator modules on hand, in accordance with the concept of true knowledge (must be hands-on), for the purpose of learning and communication, here I am going to try and do more experiments one by one. Whether it is successful or not, it will be recorded ——Small progress or unsolvable problems, I hope to be able to throw bricks and spark jade.
[Arduino] 168 kinds of sensor module series experiments (data code + simulation programming + graphic programming)
Experiment 9: Flame sensor module fire source detection module infrared receiving sensor fire detection alarm (3/4 wire)
3. 3-pin and 4-pin flame sensor module (English flame sensor module)
1. Purpose: These types of sensor modules are often used for short-distance fire detection, and can be used for monitoring projects or as a safety precaution to cut/open equipment, so they are called flame sensor.
The modules have fixing bolt holes for easy installation.
Small PCB board size: 3.2cm x 1.4cm.
2. Schematic diagram of module electrical principle
3. Module parameters and main features
(1) It can detect flames or flame light sources with a wavelength in the range of 760nm to 1100nm
(2) The detection angle is about 60 degrees, which is particularly sensitive to the flame spectrum
(3) The sensitivity of the digital switch output can be passed through the blue Adjustable potentiometer
(4) Comparator output, clean signal, good waveform, strong driving ability, more than 15mA
(5) Equipped with adjustable precision potentiometer to adjust sensitivity
(6) Detection distance of flame: related to sensitivity and flame intensity, Generally applicable within 1m (tested by lighter flame, the sensor can be triggered within half a meter)
(7) Analog output (A0): real-time output voltage signal 0~1023 (suitable for high-precision occasions)
(8) Digital output (D0): can Adjust the output high and low signal threshold 0 or 1 through the potentiometer (easy to use)
(9) There are fixing bolt holes for easy installation
(10) Small board PCB size: 3.2cm x 1.4cm
(11) Use wide voltage LM393 comparator
(12 ) Working voltage 3.3V-5V.
4. Three-wire module wiring instructions
(1) VCC is connected to the positive pole of the power supply 3.3-5V
(2) GND is connected to the negative pole of the power supply
(3) DO TTL switch signal output
5. Four-wire module wiring instructions:
(1) VCC is connected to the positive pole of the power supply 3.3-5V
(2) GND is connected to the negative pole of the power supply
(3) DO TTL switch signal output
(4) AO small board analog signal output (voltage signal)
6. Working principle of the flame sensor
The flame module is very sensitive to the infrared wavelength of 760 nm~1100 nm. Flame sensors, smoke sensors, fire alarms etc. are part of the safety equipment that helps us protect our homes, offices and shops from fire. Almost all modern houses, apartments, shopping centers, cinema halls, theaters, office buildings and shops are equipped with this type of safety equipment, and in some areas it is mandatory to use fire safety equipment.
7. Explanation of the flame sensor module experiment
(1) The flame sensor is the most sensitive to the flame, and also responds to ordinary light, and is generally used for flame alarms and other purposes.
(2) When the module's ambient flame spectrum or light source does not reach the set threshold, the DO port outputs a high level, and when the external environment's flame spectrum or light source exceeds the set threshold, the module D0 outputs a low level; (3) Block
digital The quantity output D0 can be directly connected with the Arduino UNO, and the high and low level can be detected through the Arduino, so as to detect the temperature change of the environment; (4) The
digital quantity output DO of the small board can directly drive the relay module, and can form a flame switch;
(5 ) The analog output AO of the small board can be connected to the AO terminal of the Arduino UNO. Through AD conversion, a more accurate value of the ambient humidity can be obtained (the AO terminal is only available on the 4-wire board); (6) The sensor should be kept at a certain distance from the flame to
avoid High temperature damages the sensor, and the test flame distance of the lighter is around 80cm. The larger the flame, the farther the test distance should be; (7
) The module can also be used as an infrared receiving sensor
; , keep in mind safety first.
4. Five-way flame sensor module (English Five-way flame sensor module)
1. Module technical parameters
Detection wavelength: 700—1100 nm
Detection distance: greater than 1.5m
Power supply voltage: 3V-9V
Working principle:
It can detect short-wave near-infrared rays (SW-NIR) with a wavelength range of 700-1100 nm emitted by flames, and output them through electrical signals (voltage signals).
Applicable occasions: all occasions where flame detection and fire alarm are required.
2. The main features of the module
(1) It adopts five-way flame sensor design, which has a wide detection range (the detection range of a common single flame sensor is about 30°, and as the distance increases, the range gradually decreases. The detection range of this module is greater than 120° °)
(2) Can output digital signals (high and low levels), easy to use
(3) Can output analog signals (voltage signals), can measure signals more accurately, suitable for high-precision occasions
(4) All five outputs have status The indicator light brings great convenience no matter in debugging or in practical application
(5) The detection distance of digital output is adjustable, the sensitivity of analog output is adjustable, and the design is more flexible
(6) The design of 1% resistance is adopted, and the signal output More accurate, suitable for occasions that require high-precision measurement
(7) There are 3 M3 mounting holes on the board, which is convenient for installation
(8) 3.3V-9V power supply, compatible with most single-chip microcomputer systems
(9) SMT components are all fully automatic Welding, military quality is trustworthy
3. The electrical schematic diagram of the five-way flame sensor module
4. Module pin description
Signal output port (from top to bottom):
A1 (the first output port is marked as A2 on the module): the first analog signal output port of the flame sensor, the output voltage increases with the increase of flame intensity D1 (the
first One output port is marked as D2 on the module): the first digital signal output port of the flame sensor, high level means there is flame (indicator light is on), low level means no flame (indicator light is off) A2:
second No. 1 flame sensor analog signal output port, the output voltage increases with the increase of flame intensity
D2
: The second flame sensor digital signal output port, high level indicates flame (indicator light is on), low level indicates no flame (indicator Light off)
A3: The third flame sensor analog signal output port, the output voltage increases with the increase of flame intensity
D3: The third flame sensor digital signal output port, high level means there is flame (indicator light is on), low power Flat mark no flame (indicator off)
A4: Analog signal output port of the fourth flame sensor, the output voltage increases with the increase of flame intensity
D4: Digital signal output port of the fourth flame sensor, high level indicates flame ( Indicator light is on), low level indicates no flame (indicator off)
A5: Analog signal output port of the fifth flame sensor, the output voltage increases with the increase of flame intensity
D5: Digital signal output port of the fifth flame sensor, high Level means there is flame (indicator light is on), low level means no flame (indicator light is off)
Power interface (connected horizontally, just connect one):
VCC: positive input port of module power supply, input range 3.3V-9V (relative to GND)
GND: negative input port of module power supply
5. Distance adjustment knob
For analog output: rotate counterclockwise (rotate where you want to increase the mark), the sensitivity increases, and only need a small input to get a high voltage output
For digital output: turn counterclockwise (want to increase the mark) The place rotates), the detection increases, and the digital output can be obtained at a long distance
Note for distance adjustment knob: 5 channels share one adjustment knob
Precautions for experiment
Sunlight has a certain influence on it. Avoid sunlight when using it. In order to reduce interference, you can heat shrink the tube at the sensor end.
5. Flame sensor combination relay module (English Flame sensor combination relay module)
1. Module features:
(1) It can detect flames or light sources with wavelengths in the range of 760nm to 1100nm. The test flame distance of lighters is 80cm. The larger the flame, the farther the test distance is. (2) The detection angle is about 60 degrees
. The flame spectrum is particularly sensitive
(3) The sensitivity is adjustable (the blue digital potentiometer in the figure is adjusted)
(4) The output of the comparator directly triggers the relay
(5) The overall dimensions are: 50x26mm, 19mm thick, with fixing bolt holes for easy installation
( 6) The output has a blue terminal block, which is convenient for wiring
2. Module technical parameters
Detection wavelength: 700-1100 nm
Detection distance: greater than 1.5m
Power supply voltage: 5VDC
Current: greater than 150mA
Load: 250V 10A AC or 30V 10A DC
