تطبيق مستشعر درجة الحرارة اللاسلكي بالأشعة تحت الحمراء في المفاتيح الكهربائية

أثناء تشغيل المفاتيح الكهربائية ذات الجهد العالي, يتم توليد الحرارة على المكونات, لذلك من الضروري قياس درجة حرارة المفاتيح الكهربائية. في هذا الوقت, هناك حاجة إلى أجهزة استشعار لدرجة الحرارة, والأنسب هو قياس درجة حرارة الألياف الضوئية الفلورية, وهي مقاومة للجهد العالي والتداخل.

أجهزة استشعار الأشعة تحت الحمراء وأجهزة الاستشعار اللاسلكية ليست مناسبة لقياس درجة الحرارة في المفاتيح الكهربائية ذات الجهد العالي

(1) طريقة قياس درجة الحرارة بمستشعر درجة الحرارة بالأشعة تحت الحمراء

تعد طريقة قياس درجة الحرارة بالأشعة تحت الحمراء طريقة تمثيلية للغاية في قياس الاتصال المباشر. تعتمد طريقة قياس درجة الحرارة بالأشعة تحت الحمراء بشكل أساسي على مبدأ الإشعاع الأسود لستيفان بولتزمان, Planck, وغيرها. الأجسام السوداء هي مشعات مثالية يمكنها أن تبعث نفس الطيف الكهرومغناطيسي عند نفس درجة الحرارة, بغض النظر عن تكوينها وخصائص الشكل المحددة. The temperature on the surface of an object is closely related to the size and wavelength distribution of the infrared radiation energy of the object itself. By measuring the infrared radiation energy of the object itself, the surface temperature can be determined. The basic components of the current infrared thermometer include an optical system, infrared detector, signal amplifier, معالجة الإشارات, and display output. The core element is the infrared detector, which can convert the incident infrared radiation into other forms of electrical signals that can be measured. After being calculated and corrected by the amplifier and signal processor circuit according to the internal algorithm of the instrument, it is converted into the temperature value of the measured target, which is then displayed on the optical system.

(2) مستشعر درجة الحرارة اللاسلكي temperature measurement method

Wireless temperature measurement method is an improvement on the contact temperature measurement method, which is a new type of temperature measurement method developed to isolate the high and low voltage between the temperature measurement equipment and the power system. A typical wireless temperature measurement system consists of distributed نقاط قياس درجة الحرارة, data receivers, and backend processing systems. Distributed temperature measurement points are directly installed at the location where temperature measurement is required, and data receivers are placed at a certain distance from the switchgear. The transmission of data between distributed temperature measurement points and data receivers is achieved through wireless communication, thereby achieving high voltage isolation and temperature data collection. This solves the problem of the contact operating temperature inside the high-voltage switchgear not being easily monitored by infrared temperature measurement. Although wireless temperature measurement method solves the safety issues of temperature measurement devices, many problems have also been found in practical applications, among which the most core problem is the stability of the temperature measurement device at the switch contact position. في التطبيقات العملية, the power supply used in this module is a current induction power supply that obtains energy from the power line, and the size of the power line load determines the amount of energy obtained by the power supply, with a large amplitude change. لذلك, the module often experiences insufficient power supply. In response to this issue, some people suggest using methods such as batteries and reducing the power consumption of temperature measurement devices. لكن, the drawback is that the batteries need to be replaced regularly after consumption, and electromagnetic interference may occur due to the low wireless power generation, resulting in errors in temperature measurement data transmission. Replacing the device battery requires the high-voltage switchgear to stop power supply, which cannot meet the continuous operation requirements of the high-voltage switchgear.

مستشعر درجة حرارة الألياف الضوئية, نظام مراقبة ذكي, الشركة المصنعة للألياف الضوئية الموزعة في الصين