1. GPS/BD:
Global satellite navigation and positioning system. The GPS/BD receiver receives accurate time information to the nanosecond level that can be used for timing, which can be used to automatically calibrate the clock time of the tower clock to ensure that the running time of the tower clock is synchronized with the GPS/BD time.
Second, lighting source:
1. LED: semiconductor light-emitting diode. It has the advantages of high luminous efficiency, long service life (100,000 hours), not easy to break, fast switching speed, high reliability and other traditional light sources, and is often used as a light source outside the tower clock lighting (tower clock pointer, scale light).
2, LED tube: its light source uses LED as a luminous body, soft light, pure color. Compared with traditional fluorescent tubes, they have higher light efficiency, more energy saving, longer service life, maintenance free and more environmentally friendly. It is the most ideal product to replace fluorescent tubes at the present stage. It is the ideal choice for lighting inside the tower clock (the overall light of the dial of the tower clock) light source.
Third, clock face material:
1, PC endurance plate: PC endurance plate is a high quality plate made of polycarbonate as the main component and CO-EXTRUSI technology. Because its surface is covered with a layer of high concentration ultraviolet absorber, in addition to the characteristics of ultraviolet resistance and can maintain long-term weather resistance, long time does not fade, in addition, PC board also has high light transmission (up to 99%), impact resistance, flame retardant, high energy saving, strong sound insulation, anti-condensation and other characteristics. It is the most commonly used material for lighting clock dial in tower clock.
2, laminated glass: By two or several layers of tempered glass sandwiched between the transparent plastic sheet, a kind of hot pressing bonded glass. Such glass by greater impact and more severe vibration, only cracks, not crushed. The product features are transparent, anti-riot, waterproof, anti-ultraviolet, etc., which is a high-grade material for the lighting clock dial in the tower clock.
3, aluminum-plastic board: that is, aluminum-plastic composite board, refers to the plastic as the core layer, both sides of the 3-layer composite board of aluminum, and the surface of the product is covered with decorative and protective coating or film as the decorative surface of the product. The characteristics of aluminum-plastic board are good weather resistance, high strength, good shock resistance, easy maintenance, and heat loss, sound insulation and excellent fire performance, there are many colors to choose from, and it is the most commonly used external lighting panel material.
4, fluorocarbon aluminum plate: is the aluminum plate after fluorocarbon electrostatic spraying treatment. Fluorocarbon spraying has excellent fading resistance, frost resistance, corrosion resistance to air pollution (acid rain, etc.), strong ultraviolet resistance, strong crack resistance and can withstand bad weather environment. It is an excellent external lighting panel material.
Four, time:
1, speaker: also known as "horn", is a kind of electrical signal into the acoustic signal transducer. The advantage is that the sound is large, the transmission distance is far, but the sound quality is general, and it is a commonly used time telling tool. 2, outdoor sound column: the sound column is installed in the box with a number of cone Angle speakers, this structure has a strong directivity, especially the high frequency directivity, and also has a great auxiliary improvement of sound quality. Especially suitable for buildings with large echo, such as churches/temples, etc. The product has the amplification characteristics of restoring the true music, clear timbre, small noise, more suitable for outdoor all-weather use. It is suitable for occasions with high requirements for sound quality
