PPD42NS - 版本历史

Comcat：/* Example code */

2018-11-19T12:14:11Z

‎Example code

Comcat：/* Example code */

2018-11-19T12:13:44Z

‎Example code

Comcat：/* Reference */

2018-11-19T12:02:02Z

‎Reference

Comcat：/* Reference */

2018-11-19T11:59:44Z

‎Reference

Comcat：/* Example code */

2018-11-19T11:10:04Z

‎Example code

Comcat：/* Reference */

2018-11-05T02:06:52Z

‎Reference

Comcat：以“== Overview == 600px * Detectable range of concentration 0~28,000 / 0 ~ 8000 pcs/liter / pcs/0.01cf * Detecting the particle diameter >1...”为内容创建页面

2018-10-30T00:31:30Z

以“== Overview == 600px * Detectable range of concentration 0~28,000 / 0 ~ 8000 pcs/liter / pcs/0.01cf * Detecting the particle diameter >1...”为内容创建页面

新页面

== Overview ==

[[文件:PPD42NS.JPG | 600px]]

* 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

 

== Example code ==

<source lang=cpp>
/*
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();
}
}
</source>

 

== Output ==

[[文件:PPD42NS-Characteristics.jpg]]

 

== Reference ==

* http://wiki.seeedstudio.com/Grove-Dust_Sensor/
* https://seeeddoc.github.io/Grove-Dust_Sensor/
* [https://publiclab.org/system/images/photos/000/010/161/original/Spec_PPD42NJ_Eng_SPP13001V00_20130319.pdf PPD42NS Datasheet]

@@ 第93行： / 第93行： @@
 * https://www.airnow.gov/index.cfm?action=pubs.aqguidepart
 * [https://www.airnow.gov/index.cfm?action=airnow.calculator AIQ Calculator]
 <br><br>

@@ 第89行： / 第89行： @@
 * https://indiaairquality.com/2014/09/28/building-pickle-the-networked-pm2-5-monitor-part-1/
 * http://forum.arduino.cc/index.php?topic=176269.0
 <br><br>
 <br><br>

@@ 第87行： / 第87行： @@
 * https://seeeddoc.github.io/Grove-Dust_Sensor/
 * [https://publiclab.org/system/images/photos/000/010/161/original/Spec_PPD42NJ_Eng_SPP13001V00_20130319.pdf PPD42NS Datasheet]
+* https://indiaairquality.com/2014/09/28/building-pickle-the-networked-pm2-5-monitor-part-1/
 <br><br>
 <br><br>

@@ 第61行： / 第61行： @@
      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(" pcs/0.01cf, LowPulsOccu = ");

@@ 第63行： / 第63行： @@
      Serial.print("concentration = ");
      Serial.print(concentration);
-     Serial.println(" pcs/0.01cf, LowPulsOccu = ");
+     Serial.print(" pcs/0.01cf, LowPulsOccu = ");
      Serial.print(lowpulseoccupancy);
      Serial.print(", Ratio = ");

@@ 第45行： / 第45行： @@
 void setup() {
    Serial.begin(9600);
-   pinMode(8,INPUT);
+   pinMode(pin,INPUT);
    starttime = millis();    //get the current time;
+}