??? 08/28/07 04:42 Read: times |
#143680 - 3 sensors for one color Responding to: ???'s previous message |
Hello Stefan,
I have tried my best to explain you my application but I think you are still not clear on that. I will try again. Actually I am developing a sorting system which will sort objects on its colors. My objects are very small,average size is 5mm-6mm. This objects are in motion on a black conveyor(speed approx 420mm/sec) My sensors(TAOS's TCS230)are mounted in travel path of the objects.sensor1 for R,sensor2 for G,sensor3 for B Distace betwn them is 24mm.Time taken to read each object correctly by each sensor is 8msec by increasing illumination the value goes to 6msec. Currently I am using trigger to read the objects. I have achieved great results ie I am able differentiate objects with slight variations also. But the problem is these objects have to passed through all the sensors before the next object arrives. So I decided to read this objects simulataneously using RTOS. Which I then thought will be very complex and I have not worked on it before. Also I cannot poll to eliminate trigger because I have to poll for atleast 8msec to diffentiate between conveyor and my objects. So I have to read the object when it is exactly in the centre of the sensor. My question is that is there anyway out or I have to change my approach. I have also have Avago's Digital color sensor with response time of 15usec. But I have to start from the scratch and I am worried about its accuracy as TCS230 is tried & tested & is fairly accurate. Please provide some suggestion which can help me out from this situation. Thanks D |