Grove Dust Sensor
来自Jack's Lab
（版本间的差异）
(→Overview) |
(→Reference) |
||
| 第14行： | 第14行： | ||
<br> | <br> | ||
| + | |||
| + | == 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 = 2000;//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); | ||
| + | lowpulseoccupancy = lowpulseoccupancy+duration; | ||
| + | |||
| + | 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; // using spec sheet curve | ||
| + | Serial.print("concentration = "); | ||
| + | Serial.print(concentration); | ||
| + | Serial.println(" pcs/0.01cf"); | ||
| + | Serial.println("\n"); | ||
| + | lowpulseoccupancy = 0; | ||
| + | starttime = millis(); | ||
| + | } | ||
| + | } | ||
| + | </source> | ||
| + | |||
| + | <br><br> | ||
== Reference == | == Reference == | ||
2018年10月25日 (四) 00:44的版本
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
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 = 2000;//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);
lowpulseoccupancy = lowpulseoccupancy+duration;
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; // using spec sheet curve
Serial.print("concentration = ");
Serial.print(concentration);
Serial.println(" pcs/0.01cf");
Serial.println("\n");
lowpulseoccupancy = 0;
starttime = millis();
}
}
3 Reference
