Long-term expectation in air-conditioned rooms, air drying in addition to dry skin accidents, can also lead to respiratory diseases, because the human respiratory mucosa requires a certain amount of humidity, dry air will accelerate the aging of the mucous membranes, resulting in uncomfortable throat and upper respiratory tract, dry then The mucosa accelerates aging and its function is reduced. Replenishing indoor air is also an indispensable part. A humidifier is a household appliance that increases the humidity of a room. The humidifier can humidify the designated room or it can be connected to a boiler or central air conditioning system to humidify the entire building. The humidifier is divided into two types: a fan humidifier and an ultrasonic humidifier. When purchasing a humidifier, it is best to use an ultrasonic humidifier, and do not place it near the bedside or near the sofa to reduce the water. The fog breeds bacteria and harms the human body. The Guangdong Provincial Bureau of Quality and Technical Supervision sampled 30 batches of humidifier products produced by 26 companies in Guangdong Province. After inspection, it was found that 7 batches of products produced by 7 companies were unqualified, and the rate of unqualified products was 23.3%. Only 3 batches were rejected, and the product quality was found to be 13.3%. The unqualified items involve four items: signs and instructions, protection against contact with live parts, mechanical strength, and structure. This spot check is based on GB 4706.1-2005 "Safety of Household and Similar Electrical Appliances Part 1: General Requirements", GB 4706.48-2009 "Special Requirements for Safety Humidifiers for Household and Similar Electrical Appliances", Relevant Laws Regulations, departmental rules and regulations, current and effective corporate standards and product quality requirements. Marking and description of humidifier products, protection against contact with live parts, input power and current, heat generation, leakage current and electrical strength at operating temperature, moisture resistance, leakage current and electrical strength, abnormal operation, stability and mechanical Hazardous, mechanical strength, construction, internal wiring, power connections and external cords, external conductor terminals, grounding measures, screws and connections, clearances, creepage distances and solid insulation were examined. The optical module (optical module) is composed of optoelectronic devices, functional circuits and optical interfaces. The optoelectronic device includes two parts: transmitting and receiving.
Simply put, the function of the optical module is to convert the electrical signal into an optical signal at the transmitting end, and after transmitting through the optical fiber, the receiving end converts the optical signal into an electrical signal.
The optical module is an optoelectronic device that performs photoelectric and electro-optical conversion. The transmitting end of the optical module converts electrical signals into optical signals, and the receiving end converts optical signals into electrical signals. Optical modules are classified according to the packaging form. Common ones include SFP, SFP+, SFF, Gigabit Ethernet Interface Converter (GBIC), etc.
The transmitting part is: the electrical signal with a certain code rate is processed by the internal drive chip and then drives the semiconductor laser (LD) or light-emitting diode (LED) to emit the modulated light signal of the corresponding rate. The internal optical power automatic control circuit makes The output optical signal power remains stable. Sfp Module,Scodeno Sfp Transceiver,Scodeno Optical Transceiver,Gpon Optical Sfp Module Shenzhen Scodeno Technology Co.,Ltd , https://www.scodenonet.com
The receiving part is: the optical signal of a certain code rate is input into the module and then converted into an electric signal by the light detection diode, and the electric signal of the corresponding code rate is output after the preamplifier.