Açıklama
Grove – Infrared Reflective Sensor v1.2 can be used for the detection of proximity and color of objects. The reflective photosensor – RPR-220 used in this module consists of an infrared light emitting diode and a high –sensitivity phototransistor.
Features
- Highly sensitive and reliable: With the help of the reflective photosensor – RPR-220, There is a built-in visible light filter minimizes the influence of stray light and a plastic lens is used for high sensitivity.
- Adjustable sensitivity for different occasions: The sensitivity of the reflective light sensor can be changed by adjusting the potentiometer with a screwdriver.
- Grove unified socket: The sensor ensures “Plug and Play” and could be versatile for various applications.
Description
Grove – Infrared Reflective Sensor is used to detect the presence of an object within a specific range. This product uses the RPR-220 to detect. The sensor consists of an IR LED and a photosensor (phototransistor) pair. The light emitted by the IR LED gets reflected by any object placed in front of the sensor and this reflection is detected by the photosensor(phototransistor). Any white (or lighter) colored surface reflects more than black (or darker) colored surface.
When the reflected light is detected, it produces Digital LOW (or Binary 0) output on the SIG pin. The on-board LED indicator will also glow. If no reflection is detected or if the object is too far from the sensor, the output on the SIG pin stays at Digital High (Binary 1). The on-board LED indicator will be off as well. The detectable range of this sensor is 4–16 mm. The module incorporates a Rail-to-Rail Operational Amplifier to amplify the output of phototransistor. There is a potentiometer which can be used to adjust the gain of the amplifier, that is, sensitivity of detection.
What is the difference between the IR distance sensor and the ultrasonic distance sensor?
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IR distance sensor |
Ultrasonic Sensor |
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What it does |
Measure distance through reflected light waves |
Measure distance through reflected sound waves |
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How it measures |
Triangulation: Angle of a reflected IR beam is measured |
Time taken between transmitting and receiving sound waves are recorded |
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Human Relationship |
Invisible to the naked eye |
Unhearable |
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Object Requirements |
Suitable to be used to measure complex objects |
Not suitable to measure objects with complex surfaces |
We have developed more than 400 Grove modules, covering a wide range of applications that can fulfill various needs. Click to explore the Grove Sensor family and get started to Grove your Idea. For all Grove users (especially beginners), we provide you with guidance PDF documents. Please download and read through Preface – Getting Started and Introduction to Grove before your use of the product.
Application
- Compact disc players
- Copiers
- Game machines
- Office automation equipment
- Line following robots
- Optical encoders
- Object counting
Specifications
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Dimensions |
89mm x140mm x10.5mm |
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Weight |
G.W 4g |
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Battery |
Exclude |
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Operating voltage(V) |
3.3–5V |
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Operating current(mA) |
14.69–15.35 mA |
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Effective detectable distance |
4–15 mm |
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Response time |
10 μs |
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Phototransistor: Peak sensitivity wavelength |
800 nm |
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IR LED: Peak light emitting wavelength |
940 nm |
Hardware Overview
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RPR220 Reflective photosensor – Highly sensitive reflective photosensor.
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LMV358 – rail-to-rail operational amplifier.
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LED Indicator – The LED will switch on when the received infrared light intensity exceeds a preset level.
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Light sensitivity adjustment potentiometer – adjust the sensitivity of photosensor to light.
Part List
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Grove – Infrared Reflective Sensor |
1 |
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Grove Cable |
1 |
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