Grove – Infrared Reflective Sensor 紅外線循跡,循線,避障模組 v1.2 seeed
紅外線的反射是通過檢測物體表面發射光線的顏色和距離。因此，當一個淺色物體靠近時，信號強度增加，指示燈變成紅色，當深色物體靠近時，信號強度減弱，指示燈熄滅。紅外反射傳感器主要應用在尋線跟跟踪、旋轉測速，或是其他被檢測物體顏色對比強烈的場景。
特徵
- Grove兼容且易於使用
- 高度敏感和可靠
- 佔地面積小
- 適用於不同場合的靈敏度
- 內置指示燈LED
- 通過電位計可調節閾值
規格
| 工作電壓（V） | 3.3-5V |
| 工作電流（mA） | 14.69-15.35毫安 |
| 有效的可檢測距離 | 4-15毫米 |
| 單色線的最小可檢測寬度 | 10mm |
| 光電晶體管：峰值靈敏度波長 | 800納米 |
| IR LED：峰值發光波長 | 940nm |
| 數字輸出 | 0或VCC |
| 反射光電傳感器 | RPR-220 |
出貨清單
- Grove – Infrared Reflective Sensor x1
- Grove連接線 x1
技術教學
Grove – Infrared Reflective Sensor v1.2
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
- 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
