1, Requirements for each subsystem in the microwave station according to the role of each subsystem consider wireless ripple : ① Main communication system Wireless ripple : When there are more than two channels in the transceiver wireless equipment of the microwave station, it is best to arrange the wireless ripple in a column, and only feed in this wayThe line of the waveguide shunt system is easy to arrange.
2, requirements for each subsystem in the microwave station: When there are more than two channels in the transceiver wireless equipment of the microwave station, it is best to arrange a column, only in this way can the waveguide shunt system of the feeder be easily arranged. For example, a link has 8 channels, and 4 channels share a feeder (where singular and even channels are transmitted with different polarization, so 8 channels need to use two feeders). Chapter I General Provisions The first article is to make reasonable and effective use of microwave frequency resources to prevent the phase between microwave relay communication stations and other radio communication stations in the same frequency bandDoes 1A or 2A charge with other USB chargers? 1, because the voltage output of the charger has been increased wireless ripple , but the interface standard is still USB wireless ripple , in order to avoid damage caused by standard USB voltage equipment accessing the charger, Although the fast charger supports multiple high-voltage outputs, before shaking hands, it is the output of 5V standard voltage, that is to say, it can be used as an ordinary 5V charger.
2, V/1The biggest difference between A and 5V/2A two mobile phone chargers is the difference in output current, in most cases, the two mobile phone chargers can be universal, but the charging speed is different, if the capacity of the mobile phone battery is too large, the use of small current mobile phone charger charging speed is very slow, it is recommended that you choose flexibly according to the situation. The current of the two mobile phone chargers is different, and the power is also different.
3, the maximum power supply of each port of the computer USB interface is 5V/0.5A (5W), but many devices need higher power to work normally. We can choose to replace the power supply with higher powerThe adapter, such as a 5V/1A or 5V/2A charger, can be connected to the computer via a USB cable to provide more power.
4, in short, now mobile phone chargers are universal, will not harm the battery. What is the difference between 5v= 1A and 5v=2A? Whether it can be universal, first of all, the main difference is that the maximum output current 1A [5w], then 5v=2A The maximum output current 2A [10W], which means that 2A is faster than 1A. Then under the same conditions charging 1A charger to heat more prominent.
5Just like the iphone charger is 5V/1A, the ipad charger is 5V/2A, but it can be completely mixed. The total output of the charger with several USB ports may be 5V/12A, and the single-port output is 5V/4A, so it can charge the ipad and also charge the mobile phone. Finally concluded: as long as it is a regular charger, it can be mixed, but to ensure that the output voltage is consistent (generally 5V).
So many wireless sensors must be able to power themselves. Harvesting energy from the surrounding environment has become the preferred solution wireless ripple , or by increasing the capacity of rechargeable storage devices to extend the interval between battery replacement, even without the need for battery replacement. A variety of energy sources are currently available, including solar, thermal, and vibrational energy, and even the use of ambient radio frequencies (RF).
Huawei HiLink through HiLink open platform, LiteOS end side intelligent system and IoTDedicated chip this "three-piece" to solve these problems. The HiLink platform has connected more than 30 million users and 600 ecological partners, covering more than 100 categories, providing one-stop development tools for developers and reducing the difficulty of hardware adaptation.
This requires relevant vendors to invest a lot of manpower and material resources in integrating security protocols and security software, and strive to reduce the barriers encountered by adding advanced security features to iot products to ensure that the threshold is lowered in terms of safeguarding security.
Critical testing session Wireless ripple In the new era of the Internet of Things, the revolution of tactile sensors Wireless ripple : The source of green power in the ultra-micro world With the rapid development of the Internet of Things (IoT), ultra-micro, low-power sensors and devices have become the invisible pillar of People's Daily life. However, for countless setsThe challenge of continuous power supply is becoming more and more prominent, and the size and weight of traditional batteries limit their portability and sustainability. Tribopower generation technology came into being, providing a lifeline to this problem. Stable and reliable: can provide carrier-grade reliable access, effectively support IoT applications and smart city solutions
1, the inductor coil heating is due to the coil resistance is very low, 220V voltage plus later will produce a large current, the current will be very hot, you can try to increase the voltage frequency, frequency increase, inductive reactance increase, the current is small.
2, inductance heating is too large current, inductor wire diameter is too low, caused by. Increase the inductance, that is, the coilNumber, replace the wire diameter of the coil, you can reduce the inductance temperature. But the inductance temperature resistance is high, as long as it is not more than 100 degrees, it will not burn. Inductance is a property of a closed loop and is a physical quantity.
3, the self-inductance phenomenon is caused by a high induction potential. If the inductor is in the state of no current passing through, it will try to prevent the current from flowing through it while the circuit is on; If the inductor is in the state of current passing through, it will try to maintain the current when the circuit is disconnected. When the inductor coil is connected to the AC power supply, the magnetic field line inside the coil will change with the alternating current, resulting in a lineThe coil generates electromagnetic induction.
4, the main reason is that the inductor wire used is relatively thin, it can not withstand the temperature rise, but there will be other reasons to cause the inductor high temperature. It also has a lot to do with the powder core of the inductor core. If the powder heat of the inductor core is too large, then the temperature will be transmitted to the enameled wire, which will cause the temperature of the entire product to be too high and hot.
5, the serious problem of resonant inductor heating has its own problems and external problems. Self problem: The inductor coil heats up because the resistance of the coil is very low. The inductance is saturated, and this condition will also heat up. External issues:The inductance caused by inadequate circuit board design heats up during use. Error in inductor selection causes heating. There is a problem with the powder formulation of the inductance core.