HC-SR505 صغير PIR حساس حركة وحدة

وصف

تستخدم وحدة استشعار الحركة HC-SR505 Mini PIR الأشعة تحت الحمراء التي تنتجها حرارة الجسم لاكتشاف الحركة على مسافة تصل إلى 10 أقدام.

الميزات الرئيسية لوحدة استشعار الحركة الصغيرة HC-SR505:

• يكتشف حرارة الجسم على مسافة تصل إلى 10 أقدام
• 4.5 إلى تشغيل ZKEEP0Z (متوافق مع ZKEEP1Z)
• طاقة منخفضة جدًا (70uA)

PIR (Passive Infrared) Motion Sensors are used to detect motion. They work by detecting the changes in infrared radiation that come from body heat. The sensor has two windows that have different fields of view. Since infrared comes from many different sources, it is differences in infrared between what the two sensor windows detect within a short period of time that is determined to be motion.

يشبه هذا المستشعر HC-SR501، ولكنه عبارة عن حزمة أصغر مع تشغيل افتراضي ثابت وأسهل قليلاً في الاستخدام بينما يحتوي HC-SR501 على عدد من الخيارات التي يمكن ضبط can عليها.

The sensor has a range of 3-4 meters (9-12 feet).   When triggered, the sensor output goes HIGH for approximately 6-12 seconds then returns LOW.  If motion continues within the sensor range, the module will continue to retrigger and keep the output HIGH until the motion stops for at least 6-12 seconds.  The length of the time delay varies between sensors, but is fairly consistent for a given sensor.  The sensor has a white plastic dome over it. This dome is used to increase the field of view and to help provide some protection to the sensor.  The field of view is approximately 100 degrees.

الاستخدام الشائع للمستشعر هو اكتشاف متى يتحرك شخص أو حيوان داخل أو خارج نطاق المستشعر ثم اتخاذ بعض الإجراءات مثل تشغيل / إطفاء الأضواء، أو تمكين المروحة، أو تمكين دعامة الهالوين أو ربما التقاط صورة.

Basic operation is simple. Just apply ZKEEP0Z and ground to the module. The sensor output is a logic HIGH when motion is detected and LOW when it is idle. This output can be connected to a uC or it can be connected directly to a relay module that can handle a logic level input in some cases if you just want to turn something on/off based on motion.

تأخير التشغيل

When the sensor is first powered on, it learns the ambient IR signature of its environment. Basically it is calibrating itself to its environment so that it can determine what constitutes motion.  This takes around 15 seconds.

During that calibration time, false triggers are likely to occur so any triggers during this time should be ignored. It is important that there is not a lot of motion in the sensors view when it is going through its self-calibration as that can interfere with the calibration process.

The module has a very low power draw of about 70uA even when active. Because of the low power requirements, it can be powered off a digital output pin from a microcontroller if desired. If that is done, keep in mind the 15 second startup time.

اتصالات الوحدة النمطية

يوجد رأس 3-pin في التجميع.

1 × 3 رأس

• ‘+’  =      Connect to ZKEEP0Z to ZKEEP1Z.
• خارج  =  Digital sensor output (active HIGH) – Normally connects to a digital input pin on a microcontroller
• ‘- ‘  =      Connect to system ground.  This ground needs to be in common with the microcontroller.

المواصفات الفنية