①Compression resistance
If the solar road stud cannot withstand a certain amount of pressure, it will easily shatter after being crushed or impacted by a car, and will naturally not work properly. Therefore, compression resistance is a basic condition for the normal operation of the solar road stud. The solar road stud itself is an electronic product, which contains electronic parts. It is indeed not an easy task to make the electronic part also have a higher degree of compression performance. Generally speaking, the compression performance of solar road studs is worse than that of ordinary road studs. Some, in recent years, the technical indicator of the Ministry of Transport is 10 tons.
Methods to effectively improve the compression performance of
solar road studs include: first, the exposed solar panels use PC bulletproof materials to enhance the compression resistance of the electronic parts; second, use IC control as much as possible to reduce the volume of electronic circuits , To reduce the pressure on the electronic part; the third is to design some reinforcing ribs on the shell to share the pressure on the electronic part.
②Sealing performance
If the solar road stud is not completely sealed, it will naturally see water, which will cause a short circuit in the circuit, and the consequences are also catastrophic. A qualified solar road stud sealing performance is essential. Methods to improve the sealing performance of solar road studs include: the first separation design; the LED lampshade and the internal circuit board adopt an isolation design, even if the LED lampshade is broken, the solar road stud will still ensure that there is no water seepage inside. Second, strong neutral bonding materials are used to ensure that the solar panels, LED lampshades and spike housings are tightly bonded without any gaps between them.
③Luminous brightness
solar road studs actively emit light and clearly outline the road. Compared with reflective road studs, one of its very important features is the high luminous intensity. This technical index requires 2000 MCDs.
④Stable and reliable
An important factor that determines the life of a solar road stud is the life of the battery, and the choice of the battery is very important. In recent years, there are two types of batteries in the market that can be used for reference: one is that the battery capacity is reduced to 50% after 500 times of charging and discharging; the other is that after 1000 times of charging and discharging, the battery capacity is reduced to 79%.
The battery life must not only be long enough, but also be able to work normally in a larger temperature range. There are chemical substances inside the battery. If the temperature is too high or too low, the battery will not work. The battery operating temperature range of the solar road stud must meet the requirements of the actual use environment. The requirements of the Ministry of Transport of the People's Republic of China are -10°C to 50°C. The actual environment often exceeds this range, which places higher requirements on the battery.
The design of electronic circuit boards must follow simple and effective design principles, and do not artificially complicate, because one more circuit will increase the possibility of failure. Electronic components should also be carefully selected, because any problem with one electronic component may cause the entire system to fail.
Welding must be strong, because solar road studs bear the rolling and impact of vehicles every day, and a slight loosening of the solder joints will cause the line to loosen and fall off. Therefore, when choosing welding torches and soldering tin, we must choose high-quality processes to ensure that the solder joints are firm and reliable, and can work in a relatively "bad" environment for a long time.
Solar panels directly absorb solar energy and convert light energy into electrical energy, which can be said to be the first important link in the entire
working system of solar road studs; its working efficiency directly determines the working efficiency of solar road studs. In recent years, monocrystalline silicon solar panels have been commonly used, because the photoelectric conversion rate of monocrystalline silicon solar panels is about 14%, which can convert solar energy into electricity to the greatest extent to ensure the energy for solar road studs. supply. In addition, solar panels must be high-hardness, wear-resistant circuit boards. Solar panels are subjected to the crushing and wear of wheels every day. If the strength is not enough, it is easy to grind, which will affect the conversion efficiency of solar panels.
⑤Battery matching performance
Placed for 8 hours under standard test conditions, the rated capacity of the battery should meet the need for the road stud to emit light normally for 72 hours; even if the sun illuminance is less than 1000LX, the battery’s rated capacity should meet the requirement for the road stud to emit light for 12 hours after charging for 8 hours. Needs. If the battery matching performance is not good, there will be insufficient battery storage power in the rainy weather, causing the solar road stud to fail to emit light. In this way, the wisdom road stud has no practical value and cannot be used at all. In particular, the limitations of capacitive solar road studs are even more so. After 8 hours of storage under standard test conditions, the rated capacity of the capacitor can generally only meet the needs of the road stud to emit light normally for 12-14 hours, so capacitive solar road studs The nails have very strict requirements on the actual use environment. Not only must the sunlight be strong enough, but also cannot work normally in continuous rainy weather.
⑥Environmental adaptability
The use environment of
solar road studs is complex and changeable, and the temperature and humidity may vary greatly. The temperature in the north of my country is very low in winter, the temperature in the south is very high in summer, the temperature difference between day and night in the northwest is particularly large and dry, and the southeast is humid. These will affect whether the solar road studs work normally, so the design of solar road studs should take full account of environmental adaptability. .
In recent years, the Ministry of Transport has required a temperature range of -20°C to 85°C. At the same time, three cycles of tests between 20°C and 60°C are required to see if it can adapt to the requirements of the environment. The requirement of the Ministry of Transport for the damp and heat performance of solar road studs is that they can still work normally after 48 hours of testing under the conditions of 45°C and 98% relative humidity.
The environmental adaptability of solar road studs is a comprehensive test of its mechanical and electrical properties, involving structural design, circuit design, electronic device performance and other aspects, and even its production process, to ensure that solar road studs have a better performance. Environmental adaptability.
