Forums GRAFCET | Automatisme Systèmes automatiques Distributeur automatique de solution hydroalcoolique qui beug

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    • #19124


        J’ai développé pour une école un distributeur de gel hydroalcoolique, mais celui-ci présente quelques problèmes de fiabilité et je ne trouve pas pourquoi. Le système pourtant est très simple, composé comme suit:

        Un capteur laser VL53L0X – un Relai – une pompe péristaltique 12 V – Une carte arduino NANO – une Led – une alimentation 12 V.

        Le principe est que quand l’enfant passe sa main sous le capteur , il y a détection et fermeture du relai qui alimente la pompe, = l’enfant reçoit une dose de gel hydroalcoolique.

        Le problème qui se pose de façon aléatoire, est que à un moment donné le système se bloque et il faut débrancher l’alimentation 12V et la rebrancher pour qu’à nouveau ça refonctionne. Je soupçonne un problème de codage mais je ne suis pas sûr.

        Si quelqu’un pouvait au moins valider mon code ça serait vraiment sympa de sa part, au moins je serais fixé.

        Voici le code que j’ai utilisé :

        /* Use continuous mode to take range measurements with the VL53L0X. It is based on
        vl53l0x_ContinuousRanging_Example.c from the VL53L0X API.

        The range readings are in units of mm. */

        #include <Wire.h>
        #include <VL53L0X.h>

        VL53L0X sensor;
        int relay = 2;
        int led = 8;
        boolean contact = false ;
        int sensor_value ;
        void setup()
        pinMode(relay, OUTPUT);
        pinMode(led, OUTPUT);
        if (!sensor.init())
        Serial.println(« Failed to detect and initialize sensor! »);
        while (1) {}

        // Start continuous back-to-back mode (take readings as
        // fast as possible). To use continuous timed mode
        // instead, provide a desired inter-measurement period in
        // ms (e.g. sensor.startContinuous(100)).

        void loop()
        //digitalWrite(relay, LOW) ;
        if (sensor.timeoutOccurred()) {
        Serial.print( » TIMEOUT »);

        sensor_value = sensor.readRangeContinuousMillimeters();

        if ((sensor_value > 80) && (sensor_value < 300) && contact == false)
        digitalWrite(relay, HIGH);
        digitalWrite(led, HIGH);
        //turn ON Water pump
        delay(1000); //delay 1000ms (1 second)

        digitalWrite(relay, LOW); //turn OFF Water pump
        digitalWrite(led, LOW);

        if ((sensor_value > 80) && (sensor_value < 300) )
        contact = true ;
        contact = false ;

        Merci de votre aide.





      • #19175
        Maître des clés

          Bonjour, Projet intéressant. Si j’ai bien compris, le projet fonctionne normalement, mais un défaut apparait d’une façon aléatoire. Peut etre le soucis de la liaison série. Il ‘est utile d’enlever la partie de la liaison série pour soulager le code et libérer le port série (surtout pas utile pour votre projet). Il peut avoir un soucis du capteur aussi. Voila un exemple semblable qui utilise un capteur à ultrason:

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