Grove Dust Sensor
来自Jack's Lab
(版本间的差异)
(→Reference) |
(→Example code) |
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(未显示1个用户的8个中间版本) | |||
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http://www.sca-shinyei.com/pdf/PPD42NS.pdf | http://www.sca-shinyei.com/pdf/PPD42NS.pdf | ||
− | JST Pin 1 (Black Wire) = | + | JST Pin 1 (Black Wire) => //Arduino GND |
− | JST Pin 3 (Red wire) = | + | JST Pin 3 (Red wire) => //Arduino 5VDC |
− | JST Pin 4 (Yellow wire) = | + | JST Pin 4 (Yellow wire) => //Arduino Digital Pin 8 |
*/ | */ | ||
int pin = 8; | int pin = 8; | ||
+ | |||
unsigned long duration; | unsigned long duration; | ||
unsigned long starttime; | unsigned long starttime; | ||
− | unsigned long sampletime_ms = | + | |
+ | unsigned long sampletime_ms = 30000; //sampe 30s | ||
+ | |||
unsigned long lowpulseoccupancy = 0; | unsigned long lowpulseoccupancy = 0; | ||
float ratio = 0; | float ratio = 0; | ||
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Serial.begin(9600); | Serial.begin(9600); | ||
pinMode(8,INPUT); | pinMode(8,INPUT); | ||
− | starttime = millis();//get the current time; | + | starttime = millis(); //get the current time; |
} | } | ||
void loop() { | void loop() { | ||
− | duration = pulseIn(pin, LOW); | + | duration = pulseIn(pin, LOW); // return us |
− | lowpulseoccupancy = lowpulseoccupancy+duration; | + | lowpulseoccupancy = lowpulseoccupancy + duration; |
− | if ((millis()-starttime) >= sampletime_ms)//if the sampel time = = 30s | + | if ((millis()-starttime) >= sampletime_ms) // if the sampel time = = 30s |
{ | { | ||
− | ratio = lowpulseoccupancy/(sampletime_ms*10.0); | + | // Integer percentage 0=>100 |
− | concentration = 1.1*pow(ratio,3)-3.8*pow(ratio,2)+520*ratio+0.62; | + | ratio = lowpulseoccupancy / (sampletime_ms * 10.0); |
+ | |||
+ | // using spec sheet curve | ||
+ | concentration = 1.1 * pow(ratio, 3) - 3.8 * pow(ratio, 2) + 520 * ratio + 0.62; | ||
+ | |||
Serial.print("concentration = "); | Serial.print("concentration = "); | ||
Serial.print(concentration); | Serial.print(concentration); | ||
− | Serial.println(" pcs/0.01cf"); | + | Serial.println(" pcs/0.01cf, LowPulsOccu = "); |
− | Serial. | + | Serial.print(lowpulseoccupancy); |
+ | Serial.print(", Ratio = "); | ||
+ | Serial.println(ratio); | ||
+ | |||
lowpulseoccupancy = 0; | lowpulseoccupancy = 0; | ||
starttime = millis(); | starttime = millis(); | ||
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<br><br> | <br><br> | ||
+ | |||
+ | == Output == | ||
+ | |||
+ | [[文件:PPD42NS-Characteristics.jpg]] | ||
+ | |||
+ | <br> | ||
== Reference == | == Reference == | ||
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* [https://publiclab.org/system/images/photos/000/010/161/original/Spec_PPD42NJ_Eng_SPP13001V00_20130319.pdf PPD42NS Datasheet] | * [https://publiclab.org/system/images/photos/000/010/161/original/Spec_PPD42NJ_Eng_SPP13001V00_20130319.pdf PPD42NS Datasheet] | ||
+ | <br><br> | ||
+ | <br><br> | ||
+ | <br><br> | ||
+ | <br><br> | ||
+ | <br><br> | ||
<br><br> | <br><br> |
2018年10月25日 (四) 22:11的最后版本
目录 |
[编辑] 1 Overview
- Detectable range of concentration 0~28,000 / 0 ~ 8000 pcs/liter / pcs/0.01cf
- Detecting the particle diameter >1μm
- Output: Negative Logic, Digital output, High: over 4.0V(Rev.2), Low: under 0.7V
- Weight 28g
- VCC 4.75~5.75V
- Standby Current Supply 90mA
- Dimensions 59(W) × 45(H) × 22(D) mm
[编辑] 2 Example code
/* Grove - Dust Sensor Demo v1.0 Interface to Shinyei Model PPD42NS Particle Sensor Program by Christopher Nafis Written April 2012 http://www.seeedstudio.com/depot/grove-dust-sensor-p-1050.html http://www.sca-shinyei.com/pdf/PPD42NS.pdf JST Pin 1 (Black Wire) => //Arduino GND JST Pin 3 (Red wire) => //Arduino 5VDC JST Pin 4 (Yellow wire) => //Arduino Digital Pin 8 */ int pin = 8; unsigned long duration; unsigned long starttime; unsigned long sampletime_ms = 30000; //sampe 30s unsigned long lowpulseoccupancy = 0; float ratio = 0; float concentration = 0; void setup() { Serial.begin(9600); pinMode(8,INPUT); starttime = millis(); //get the current time; } void loop() { duration = pulseIn(pin, LOW); // return us lowpulseoccupancy = lowpulseoccupancy + duration; if ((millis()-starttime) >= sampletime_ms) // if the sampel time = = 30s { // Integer percentage 0=>100 ratio = lowpulseoccupancy / (sampletime_ms * 10.0); // using spec sheet curve concentration = 1.1 * pow(ratio, 3) - 3.8 * pow(ratio, 2) + 520 * ratio + 0.62; Serial.print("concentration = "); Serial.print(concentration); Serial.println(" pcs/0.01cf, LowPulsOccu = "); Serial.print(lowpulseoccupancy); Serial.print(", Ratio = "); Serial.println(ratio); lowpulseoccupancy = 0; starttime = millis(); } }
[编辑] 3 Output
[编辑] 4 Reference
- http://wiki.seeedstudio.com/Grove-Dust_Sensor/
- https://seeeddoc.github.io/Grove-Dust_Sensor/
- PPD42NS Datasheet