Gp2y1010au Appl e | Detector (Radio)

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Sharp HP2Y datasheet
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  GP2Y1010AU0F    Attachment-1 Sheet No.: OP13024EN Application note of Sharp dust sensor GP2Y1010AU0F Contents  Page 1. Outline of this document 1 2. Features of GP2Y1010AU0F 1 3. Objects to detect 1 4. Application 1 5. Principle of dust detection 2 6. Application guidance 6-1. Example of system connection 3 6-2. Mounting method 4 6-3. Basic output handling 5 6-4. Other cautions 5 7. Dust density characteristics (Example) 6   GP2Y1010AU0F    Attachment-1 Sheet No.: OP13024EN 1.   Outline of this document This application note of Sharp dust sensor “ GP2Y1010AU0F ”  is a document consists from Explanation how to use, cautions when using it, characteristics data, etc. for the customer  ’ s reference when applying this device. When designing the device, please refer to this document and also evaluate it under actual usage conditions. 2.   Features of GP2Y1010AU0F ・ Compact &  thin package (46 × 30 × 17.6mm) ・ With application of pulse output system, the device can detect even single house dust. ・ House dust and cigarette smoke can be distinguished. 3.   Objects to detect ・ House dust ・ Cigarette smoke 4.   Application ・ Air conditioner ・ Air purifier.   GP2Y1010AU0F    Attachment-2 Sheet No.: OP13024EN 5.   Principles of dust detection This dust sensor “ GP2Y1010AU0F ”  is the device to detect house dust, cigarette smoke, etc. and designed as a sensor for automatic running of application like air purifier and air conditioner with air purifier function.   Light from the light emitter (Light Emitting Diode) is spotted with a lens and a slit as shown on the chart-A. Also for the light detector (Photodiode), a lens and a slit is positioned in front of it to cut disturbance light and to detect light reflection (when detecting dust) efficiently. Area where those two optical axis cross is detection area of the device. Chart-B shows what is ongoing inside of the device when no dust exists and Chart-C shows that when dust exists. The device makes voltage output even when dust is not being detected. This output voltage at no dust condition is specified as Voc on the specification. This is because light emitted from the LED reflects at case of the device &   some part of it gets to the detector. Chart-C shows how the device works when dust and/or cigarette smoke exists inside of it. In this case, the detector detects the light reflected from the dust and/or a particle of the cigarette smoke. Current in  proportion to amount of the detected light comes out from the detector and the device makes analog voltage output (Pulse output) after the amplifier circuit amplifies the current from the detector.   GP2Y1010AU0F    Attachment-3 Sheet No.: OP13024EN 6.   Application guidance 6-1   Example of system connection  <Example>   ・ Resister, R1=150 Ω  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. Parameter Symbol Specified condition Recommended condition Unit Pulse cycle T 10 10±1 ms Pulse width Pw 0.32 0.32±0.02 ms ・ 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. GP2Y1010AU0F   LED Detector Driver AMP AMP AMP Dust &  Cigarette smoke Sensitivity adjustment Case   S-GND Vo LED LED-GND V-LED +5V Vcc 6 1 3 2 5 4 R1=150 Ω  C1=220 μ F Vcc +5V Microcomputer Output Input A/D GND +5V   1 6 3 2 5 4 T=10ms Pw=0.32ms Light emission I LED  Output pulse OFF ON 0.28ms Sampling timing of output pulse Sampling
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