Leader of the Sanmenxia Lakeside District went to Guangdong's aluminum processing industry
According to the bulk non-ferrous net reprinted: Recently, the deputy secretary-general of the municipal government Wang wise led the team, deputy party secretary Yang Yuemin, deputy head He Congxia and so on went to Guangdong Province, Qingyuan City, Zhaoqing City, the new concept of development of aluminum industry, new Ideas and new initiatives to study and learn. It is understood that at present, Guangdong's aluminum production accounts for 50% of the country's total, while China's aluminum production accounts for 40% to 50% of the world's total. As far as the aluminum extrusion industry in Guangdong Province is concerned, Qingyuan and Zhaoqing have a strong momentum of development, and all well-known domestic enterprises are stationed. In order to gain insights into the development of the aluminum processing industry, the inspectors visited Qingyuan Haomei Aluminum, Bakelo, Kejian Aluminum, Meiyabao Aluminum, Yuanguang Cable, Zhaoqing Zhongya Aluminum, and Asia Aluminum. Batch of large and medium-sized aluminum companies to visit and study. The inspection team unanimously felt that Qingyuan and Zhaoqing have accurate regional economic positioning, clear distribution of industrial patterns, prominent industrial scale advantages, and enhanced international and domestic competitiveness. The inspection team of the Bank actively promoted the regional advantages, resource advantages, economic development, and social and cultural conditions of Sanmenxia City, and conducted in-depth exchanges with local governments and entrepreneurs. The next step is to invite Qingyuan Municipal Government and Zhaoqing Municipal Government to lead the Municipal Quality Supervision Bureau and some enterprises to visit and inspect the region, and fully seize the opportunities of Qingyuan and Zhaoqing to cooperate with the development of aluminum enterprises in Sanmenxia City and strive for large-scale aluminum production. Processing companies settled in our district. It is mainly made of a material with high pyroelectric coefficient, such as lead zirconate titanate ceramics, lithium tantalate, triglyceride titanium sulfate, etc. to make the detection element with a size of 2*1mm. Install one or two detection elements in each detector, and connect the two detection elements in series with reverse polarity to suppress the interference caused by the rise of their own temperature. The detection element converts the detected and received infrared radiation into a weak voltage signal, which is amplified by the field effect tube installed in the probe and output outward. In order to improve the detection sensitivity of the detector and increase the detection distance, a Fresnel lens is generally installed in front of the detector. The lens is made of transparent plastic. The upper and lower parts of the lens are divided into several equal parts. It is a kind of lens with a special optical system. It can amplify the signal by more than 70 decibels in cooperation with the amplifying circuit, so that the movement of people within 20 meters can be measured. PassiveInfrared Ray,Pyroelectric sensor,Highly sensitive sensor Dongguan XINYUDA Technology Co., Ltd. , https://www.gdxige.com
The Fresnel lens uses the special optical principle of the lens to produce an alternating "blind zone" and "high-sensitivity zone" in front of the detector to improve its detection and reception sensitivity. When someone walks in front of the lens, the infrared rays emitted by the human body will alternate from the "blind area" to the "high sensitive area", so that the received infrared signal is input in the form of sudden strong and weak pulses, thereby strengthening its energy amplitude .
The central wavelength of infrared radiation radiated by the human body is 9~10--um, and the wavelength sensitivity of the detection element is almost stable in the range of 0.2~20--um. A window equipped with a filter lens is opened at the top of the sensor. The wavelength range of light that this filter can pass is 7~10--um, which is suitable for the detection of human infrared radiation, and other wavelengths of infrared rays are filtered. The sheet is absorbed, thus forming an infrared sensor specially used to detect human body radiation.