Since the illumination wavelength range of the LED illumination is narrower than that of other light sources, it is possible to selectively illuminate a wavelength suitable for the photoreaction of the plant, so that the plant can be efficiently cultivated. Compared with fluorescent lamps, LED light sources have many advantages, which not only reduce the power consumption to about 1/3, but also obtain high light quantity without being affected by heat, and can be cultivated from the original leafy vegetables to fruit vegetables and even grains. However, the problem is that initial investment is larger than fluorescent lamps, and it is necessary to shorten the investment recovery cycle in order to fully introduce commercial facilities.
Yamaguchi University's Faculty of Agriculture, Executive Justice and Showa Denko have developed the most suitable method of LED irradiation for plant growth - the "Shigyo Method". In the past, the red-blue ratio was fixed, and the new method combined with the plant growth process to change the red-blue ratio to achieve the optimal illumination wavelength. The results of the cultivation experiment showed that the yield of leafy vegetables increased by up to three times compared with the use of ordinary fluorescent lamps and fixed red-blue LED illumination in the same incubation period. This will help shorten the payback period of the LED plant factory. In addition, the Shigyo method is also effective for algae cultivation and is expected to be applied to the production of useful substances and biofuels using algae.
With the assistance of Yamaguchi University, Showa Denko will begin to provide technical licenses for the Shigyo method to commercial facilities and lighting manufacturers, and sell the display equipment and peripheral products of Showa Denko, which is mainly LED lighting. The goal of the first year is to popularize domestic commercial facilities in Japan, and in the future, it intends to provide technical licenses to large overseas facilities to promote the fuel industry and biomass joint ventures.
Dual-band WiFi module refers to the WiFi module that supports both 2.4GHZ and 5GHz bands. The dual-band WiFi module can operate in the 5Ghz band, which is much cleaner and can easily avoid interfering with each other. The advantage of 2.4G is that it has good ability to penetrate the wall, and the disadvantage is that it is easy to be disturbed. The advantages of 5G are strong anti-interference ability, wide band width, high throughput rate, and strong scalability, but the disadvantage is that 5G is only suitable for indoor small-range coverage and outdoor bridge, and the attenuation effect of various obstacles on it is much larger than 2.4g.
Dual-band WiFi module has a stronger and more stable Wifi wireless signal, higher transmission speed, and can make wireless devices more power-saving, to meet the future high-definition and big data wireless transmission needs.
When selecting a dual-frequency WiFi module, we should pay attention to these parameters of the WiFi module: size, package, frequency range, data rate, transmission rate, transmission distance, communication interface, power supply voltage, antenna interface, etc.
Dual frequency WiFi module can well meet the functional needs of users, increase the competitiveness of the product, while the WiFi module is easy to use, can shorten the user product development cycle, speed up the product market! Users can make choices according to actual needs!
Choosing a dual-band WiFi module may need to pay attention to the following points:
(1) Consider the transmission power of the dual-frequency WiFi module
The transmitting power of the WIFI module is generally about 18dBm, and the transmitting power of the high-power WIFI module is about 28dBm.
(2) Transmission rate
Consider whether the dual-band WiFi module supports MIMO technology (that is, allows multiple antennas to send and receive multiple spatial streams simultaneously)
(3) Consider the application interface that dual-band WiFi modules can provide, which is also very important.
(4) According to the requirements of the application scenario to choose the dual-band WiFi module, not the higher the configuration, the better, the application is good, excess waste!
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