电源是组成地面自动气象监测系统的外面设备之一。电源应该具备下列功能：首

电源是组成地面自动气象监测系统的外面设备之一。电源应该具备下列功能：首先它为仪器提供所需的各种供电电源，系统中主要使用两种电压，单片机、I/O口芯片等供电电压为5V，湿度、气压传感器、RS232控制芯片供电电压为12V；其次具有充电和存储电能作用，在外电源掉电的情况下能正常维护仪器的供电；第三，具有电源指示功能，是维护人员判断电源是否正常工作的重要依据。<br>12V直流电压是该仪器的基本工作电压，气象监测系统中其他直流工作电压应由此转换而成，该电压由蓄电池提供，需另外配置辅助电源对蓄电池充电。在没有市电的情况下，使用12V/24AH免维护蓄电池供电时，可以保证设备连续工作3天以上。另外电路中所需的+5V电源可通过芯片7805产生，芯片周围需配置电容作为稳压和滤波。<br>为了使电源电路具有充电、存储电能功能，需要充电、放点控制模块和电池组，当电池组电量不足时，充电控制模块就会对电池组进行充电，电池组电压达到13.6V时，就会自动停止充电；另外，控制模块也是监测电池供电情况，如果没有市电或太阳能供电时，电池组电压低到10.8V，控制模块就会断开供电，防止电池组放电过量而损坏。<br>电源指示功能需要发光二极管LED作为指示灯，指示电源供电是否正常，当电源正常时，发光二极管发光；当电源不足停止供电时，发光二极管熄灭。

电源是组成地面自动气象监测系统的外面设备之一。 电源应该具备下列功能：首先它为仪器提供所需的各种供电电源，系统中主要使用两种电压，单片机、I/O口芯片等供电电压为5V，湿度、气压传感器、RS232控制芯片供电电压为12V；其次具有充电和存储电能作用，在外电源掉电的情况下能正常维护仪器的供电；第三，具有电源指示功能，是维护人员判断电源是否正常工作的重要依据。<br>12V直流电压是该仪器的基本工作电压，气象监测系统中其他直流工作电压应由此转换而成，该电压由蓄电池提供，需另外配置辅助电源对蓄电池充电。 在没有市电的情况下，使用12V/24AH免维护蓄电池供电时，可以保证设备连续工作3天以上。 另外电路中所需的+5V电源可通过芯片7805产生，芯片周围需配置电容作为稳压和滤波。<br>为了使电源电路具有充电、存储电能功能，需要充电、放点控制模块和电池组，当电池组电量不足时，充电控制模块就会对电池组进行充电，电池组电压达到13.6V时，就会自动停止充电；另外，控制模块也是监测电池供电情况，如果没有市电或太阳能供电时，电池组电压低到10.8V，控制模块就会断开供电，防止电池组放电过量而损坏。<br>电源指示功能需要发光二极管LED作为指示灯，指示电源供电是否正常，当电源正常时，发光二极管发光；当电源不足停止供电时，发光二极管熄灭。

The power supply is one of the external equipments of the ground automatic weather monitoring system. The power supply should have the following functions: firstly, it provides all kinds of power supply for the instrument, and two kinds of voltage are mainly used in the system: the power supply voltage of MCU and I / O chip is 5V, and the power supply voltage of humidity sensor, air pressure sensor and RS232 control chip is 12V; secondly, it has the function of charging and storing electric energy, and can maintain the power supply of the instrument normally in case of power failure of the external power supply; thirdly, the power supply of the instrument can be maintained normally, It has power indication function, which is an important basis for maintenance personnel to judge whether the power supply works normally.<br>12V DC voltage is the basic working voltage of the instrument, and other DC working voltages in the meteorological monitoring system should be converted from this. The voltage is provided by the battery, and auxiliary power supply should be configured to charge the battery. In the case of no mains power supply, when using 12V / 24Ah maintenance free battery, the equipment can work continuously for more than 3 days. In addition, the + 5V power supply required in the circuit can be generated by chip 7805, and the capacitor should be configured around the chip as voltage regulator and filter.<br>In order to make the power circuit have the function of charging and storing electric energy, the charging and discharging control module and the battery pack are needed. When the battery pack is short of power, the charging control module will charge the battery pack. When the battery voltage reaches 13.6v, it will automatically stop charging. In addition, the control module also monitors the battery power supply. If there is no mains power or solar power supply, the battery will be charged When the group voltage is lower than 10.8V, the control module will disconnect the power supply to prevent the battery pack from being damaged due to excessive discharge.<br>The power supply indication function requires LED as an indicator to indicate whether the power supply is normal. When the power supply is normal, the LED will light up; when the power supply is insufficient, the LED will go out.<br>