描述
Grove – Infrared Reflective Sensor v1.2 紅外線反射感測器
用於檢測特定範圍內物體的存在。傳感器由一個IR LED和一個光電傳感器（光電晶體管）組成。IR LED發出的光線被位於傳感器前方的物體反射，這種反射被光電傳感器（光電晶體管）檢測到。任何白色（或淺色）表面都會反射超過黑色（或更深）的彩色表面。當檢測到反射光時，它會在SIG引腳上產生數字高電平（或二進制1
）輸出。板載LED指示燈也會發光。如果沒有檢測到反射，或者物體離傳感器太遠，則SIG引腳上的輸出保持為數字低（二進制0）。板載LED指示燈也將熄滅。該傳感器的可檢測範圍是4-16毫米。該模組集成了軌到軌運算放大器來放大光電晶體管的輸出。有一個電位器可以用來調整放大器的增益，也就是檢測的靈敏度。
- RPR220反射式光電傳感器，高度靈敏的反射式光電傳感器。
- LMV358，軌到軌運算放大器。
- LED指示燈，當接收到的紅外光強度超過預設水平時，LED將會亮起。
- 光靈敏度調節電位器
- 調節光電傳感器對光的靈敏度。
官方文件與資源
Grove – Infrared Reflective Sensor v1.2 can be used for 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. Light-colored objects directly in front of the sensor will reflect more infrared light as well as generate more current in the phototransistor than an object with dark-colored surfaces, this can be tell from a built-in indicator LED which will turn red with sufficient flow of current. Also, the intensity of the reflective light increases as the object getting closer. You can adjust the potential-meter on the back of the board if you want to detect a specific object (eg. Black line) at a certain distance.This sensor is a widely used in applications such as line-following robots, rotary speed detection, auto-data logging on utility meters or other situations where color or distance contrast is sharp.
Features
- Easy to use
- Panel-mounting Grove interface
- Digital output: 0 or VCC
- Built-in indicator LED
- Threshold adjustable via potentiometer
- Power supply: 3.5 – 5.5V DC
- Reflective Photosensor: RPR-220
- Effective working distance: 4-15mm
- Minimum detectable width for monochrome lines: 10mm
- Connector: 4 pin Buckled Grove interface
- Dimension: 20mm*20mm
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Technical Details
| Dimensions | 89mm x 140mm x 10.5mm |
| Weight | G.W 9.5g N.W 8.5g |
| Battery | Exclude |
