Sharp GP2Y1010AU0F Dust density sensor

Post date: Nov 10, 2015 5:9:24 AM

Resister, R1=150Ω and capacitor, C1=220uF mentioned above is required for pulse drive of the LED of GP2Y1010AU0F. Please use the ones with the above mentioned constants. Without these cmponents, the device does not work.

As input conditions of the LED terminal, please apply LED drive conditions mentioned in Electro-optical characteristics chart of the specification. When it is impossible to apply those conditions, please make it within the recommended input conditions mentioned in the specification. When the LED is driven under the condition beyond the specification, characteristics of the device will be affected.

The LED emits pulse light. Detected signal is amplified by the amplifier circuit and goes out as the output synchronized to the pulse mission of the LED. ・The specified output value is the one that is measured 0.28ms after the LED is turned on. Therefore, it is recommended that microcomputer to read the output 0.28ms after the LED emission also.

Time required for the device to be ready to detect dust from when the system is turned on is less than 1 sec.

The output voltage Vo of this sensor is the sum of output voltage at no dust Voc and output proportional to dust density ΔV. Output proportional to dust density ΔV is shown as follows. ΔV = Vo - Voc (Vo : monitor value)

Output voltage at no dust Voc is caused by the stray light ocuurring in this sensor. This sensor makes Voc voltage even at dust density 0mg/m3 . If dust attached within this sensor increases, Voc becomes bigger. On the other hand, if dust attached within this sensor decreases, Voc becomes smaller.

To store Voc in the memory of application is necessary to calculate ΔV from monitor value Vo. If monitor value Vo lower than the memorized Voc appears, this monitor value Vo should be stored in the memory of application as a new Voc.

If monitor value Vo maintains a bigger value than the memorized Voc for a certain period of time, this monitor value Vo should be stored in the memory of application as a new Voc.