CN104638758B - Real-time detection and switching circuit for power supply of remote control intelligent gas meter concentrator - Google Patents
Real-time detection and switching circuit for power supply of remote control intelligent gas meter concentrator Download PDFInfo
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Abstract
本发明公开了一种远控智能燃气表集中器电源实时检测与切换电路，它包括自动电压检测与切换电路、主电源电压检测电路、备用电源电压检测电路、第一反向截止电路、第二反向截止电路和主控MCU，所述的自动电压检测与切换电路的两个输出端分别与第二反向截止电路和备用电源电压检测电路连接，外部主电源分别与主电源电压检测电路和第一反向截止电路连接，主电源电压检测电路、第一反向截止电路、第二反向截止电路和备用电源电压检测电路的输出端均与主控MCU连接。本发明实现主电源与备用电源的供电检测，实现硬件无缝切换，并且通过主电源和备用电源电压检测电路，实时检测供电电路状态并通过主控MCU主动上报其状态，实现设备安全供电。
The invention discloses a remote control intelligent gas meter concentrator power supply real-time detection and switching circuit, which includes an automatic voltage detection and switching circuit, a main power supply voltage detection circuit, a backup power supply voltage detection circuit, a first reverse cut-off circuit, a second The reverse cut-off circuit and the main control MCU, the two output terminals of the automatic voltage detection and switching circuit are respectively connected with the second reverse cut-off circuit and the backup power supply voltage detection circuit, and the external main power supply is respectively connected with the main power supply voltage detection circuit and the voltage detection circuit of the main power supply. The first reverse cut-off circuit is connected, and the output terminals of the main power supply voltage detection circuit, the first reverse cut-off circuit, the second reverse cut-off circuit and the standby power supply voltage detection circuit are all connected to the main control MCU. The invention realizes the power supply detection of the main power supply and the standby power supply, realizes seamless switching of hardware, and detects the state of the power supply circuit in real time through the voltage detection circuit of the main power supply and the standby power supply, and actively reports the state through the main control MCU, so as to realize safe power supply of equipment.
Description
技术领域technical field
本发明涉及一种远控智能燃气表集中器电源实时检测与切换电路。The invention relates to a real-time detection and switching circuit of a remote control intelligent gas meter concentrator power supply.
背景技术Background technique
集中器（concentrator device）是连接终端、计算机或通信设备的中心连接点设备。在若干终端密集区内，通常为减少通信线路，先把终端接到集中器，然后再经过高速线路将集中器连接到计算机的通信控制器，因此，集中器也是共享线路和提高线路利用率的一种有效设备。然而现有的用于远控智能燃气表的集中器，并不具有备用电源的功能；即使有备用电源的功能也不能实现硬件的无缝切换，而且不能做到对供电电路的状态进行实时监控。A concentrator device is a central connection point device for connecting terminals, computers or communication devices. In a number of terminal-intensive areas, usually in order to reduce communication lines, the terminal is first connected to the concentrator, and then the concentrator is connected to the communication controller of the computer through a high-speed line. Therefore, the concentrator is also the best way to share lines and improve line utilization. An effective device. However, the existing concentrators for remote control of smart gas meters do not have the function of backup power supply; even if there is a function of backup power supply, the seamless switching of hardware cannot be realized, and the status of the power supply circuit cannot be monitored in real time. .
发明内容Contents of the invention
本发明的目的在于克服现有技术的不足，提供一种远控智能燃气表集中器电源实时检测与切换电路，具有切换时间快、无缝延迟的优点。The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a real-time detection and switching circuit for the remote control smart gas meter concentrator power supply, which has the advantages of fast switching time and seamless delay.
本发明的目的是通过以下技术方案来实现的：远控智能燃气表集中器电源实时检测与切换电路，它包括自动电压检测与切换电路、主电源电压检测电路、备用电源电压检测电路、第一反向截止电路、第二反向截止电路和主控MCU，所述的自动电压检测与切换电路的两个输入端分别与外部主电源和外部备用电源连接，所述的自动电压检测与切换电路的两个输出端分别与第二反向截止电路和备用电源电压检测电路连接，外部主电源还分别与主电源电压检测电路和第一反向截止电路连接，主电源电压检测电路、第一反向截止电路、第二反向截止电路和备用电源电压检测电路的输出端均与主控MCU连接，第一反向截止电路和第二反向截止电路的输出端还用于电源输出。The purpose of the present invention is achieved through the following technical solutions: remote control intelligent gas meter concentrator power supply real-time detection and switching circuit, which includes automatic voltage detection and switching circuit, main power supply voltage detection circuit, backup power supply voltage detection circuit, first The reverse cut-off circuit, the second reverse cut-off circuit and the main control MCU, the two input terminals of the automatic voltage detection and switching circuit are respectively connected with the external main power supply and the external backup power supply, and the automatic voltage detection and switching circuit The two output ends of the two output terminals are respectively connected to the second reverse cut-off circuit and the backup power supply voltage detection circuit, and the external main power supply is also respectively connected to the main power supply voltage detection circuit and the first reverse cut-off circuit, the main power supply voltage detection circuit, the first reverse cut-off circuit The output ends of the reverse cut-off circuit, the second reverse cut-off circuit and the standby power supply voltage detection circuit are all connected to the main control MCU, and the output ends of the first reverse cut-off circuit and the second reverse cut-off circuit are also used for power supply output.
所述的自动电压检测与切换电路用于检测主电源和备用电源的电压，并根据电压情况选择供电电源：当主电源有电时，自动切换到主电源供电；当主电源掉电时自动切换到备用电源供电；当主电源上电时，自动切换到主电源供电。The automatic voltage detection and switching circuit is used to detect the voltage of the main power supply and the backup power supply, and select the power supply according to the voltage situation: when the main power supply has power, it will automatically switch to the main power supply; when the main power supply is powered off, it will automatically switch to the backup power supply. Power supply; when the main power supply is powered on, it will automatically switch to the main power supply.
所述的主电源电压检测电路和备用电源检测电路分别用于检测主电源和备用电源的供电电路上的电压并传输给主控MCU。The main power supply voltage detection circuit and the backup power supply detection circuit are respectively used to detect the voltages on the power supply circuits of the main power supply and the backup power supply and transmit them to the main control MCU.
所述的主控MCU根据主电源电压检测电路发送的主电源电压检测信号和备用电源电压检测电路发送的备用电源电压检测信号，给出当前供电电路工作状态指示：The main control MCU gives the current power supply circuit working state indication according to the main power supply voltage detection signal sent by the main power supply voltage detection circuit and the backup power supply voltage detection signal sent by the backup power supply voltage detection circuit:
（1）当检测到是主电源供电时，如果备用电源电压检测电路输出的电压与主电源电压检测电路输出的电压相近，会引起主电源给备用电源供电的情况，则第二反向截止电路异常，MCU给出第二反相节制电路异常工作状态指示；(1) When it is detected that the main power supply is powered, if the output voltage of the backup power voltage detection circuit is similar to the output voltage of the main power voltage detection circuit, it will cause the main power supply to the backup power supply, the second reverse cut-off circuit Abnormal, the MCU gives an indication of the abnormal working state of the second inverting control circuit;
（2）当检测到是主电源供电时，如果备用电源电压检测电路输出的电压为备用电源正常检测电压，则自动电压检测与切换电路异常，MCU给出自动电压检测与切换电路异常工作状态指示；(2) When the main power supply is detected, if the output voltage of the backup power voltage detection circuit is the normal detection voltage of the backup power supply, the automatic voltage detection and switching circuit is abnormal, and the MCU will give an indication of the abnormal working status of the automatic voltage detection and switching circuit ;
（3）当检测到时备用电源供电时，如果检测到主电源电压检测电路输出的电压与备用电源电压检测电路输出的电压相近，会引起备用电源给主电源供电的情况，则第一反向截止电路异常，MCU给出第一反向截止电路异常工作状态指示。(3) When the standby power supply is detected, if it is detected that the output voltage of the main power supply voltage detection circuit is similar to the output voltage of the backup power supply voltage detection circuit, it will cause the backup power supply to the main power supply, then the first reverse The cut-off circuit is abnormal, and the MCU gives an indication of the abnormal working state of the first reverse cut-off circuit.
所述的主控MCU的型号为MSP430。The model of the main control MCU is MSP430.
所述的外部备用电源为干电池。The external backup power supply is a dry battery.
本发明的有益效果是：（1）本发明通过自动电压检测与切换电路实现主电源与备用电源的供电检测，实现硬件无缝切换，具有切换时间快、无缝延迟的优点；（2）本发明通过主电源和备用电源电压检测电路，实时检测供电电路状态并通过主控MCU主动上报其状态，实现设备安全供电。The beneficial effects of the present invention are: (1) The present invention realizes the power supply detection of the main power supply and the standby power supply through the automatic voltage detection and switching circuit, and realizes the seamless switching of the hardware, and has the advantages of fast switching time and seamless delay; (2) the present invention The invention uses the main power supply and backup power supply voltage detection circuit to detect the status of the power supply circuit in real time and actively reports its status through the main control MCU, so as to realize the safe power supply of equipment.
附图说明Description of drawings
图1为本发明结构方框图。Fig. 1 is a structural block diagram of the present invention.
具体实施方式detailed description
下面结合附图进一步详细描述本发明的技术方案：如图1所示，远控智能燃气表集中器电源实时检测与切换电路，它包括自动电压检测与切换电路、主电源电压检测电路、备用电源电压检测电路、第一反向截止电路、第二反向截止电路和主控MCU，所述的自动电压检测与切换电路的两个输入端分别与外部主电源和外部备用电源连接，所述的自动电压检测与切换电路的两个输出端分别与第二反向截止电路和备用电源电压检测电路连接，外部主电源还分别与主电源电压检测电路和第一反向截止电路连接，主电源电压检测电路、第一反向截止电路、第二反向截止电路和备用电源电压检测电路的输出端均与主控MCU连接，第一反向截止电路和第二反向截止电路的输出端还用于电源输出。Further describe the technical scheme of the present invention in detail below in conjunction with accompanying drawing: As shown in Figure 1, remote control intelligent gas meter concentrator power supply real-time detection and switching circuit, it comprises automatic voltage detection and switching circuit, main power supply voltage detection circuit, backup power supply Voltage detection circuit, the first reverse cut-off circuit, the second reverse cut-off circuit and the main control MCU, the two input ends of the automatic voltage detection and switching circuit are respectively connected with the external main power supply and the external backup power supply, the described The two output ends of the automatic voltage detection and switching circuit are respectively connected with the second reverse cut-off circuit and the standby power supply voltage detection circuit, and the external main power supply is also connected with the main power supply voltage detection circuit and the first reverse cut-off circuit respectively, and the main power supply voltage The output terminals of the detection circuit, the first reverse cut-off circuit, the second reverse cut-off circuit and the backup power supply voltage detection circuit are all connected with the main control MCU, and the output ends of the first reverse cut-off circuit and the second reverse cut-off circuit are also used on the power output.
所述的自动电压检测与切换电路用于检测主电源和备用电源的电压，并根据电压情况选择供电电源：当主电源有电时，自动切换到主电源供电；当主电源掉电时自动切换到备用电源供电；当主电源上电时，自动切换到主电源供电。The automatic voltage detection and switching circuit is used to detect the voltage of the main power supply and the backup power supply, and select the power supply according to the voltage situation: when the main power supply has power, it will automatically switch to the main power supply; when the main power supply is powered off, it will automatically switch to the backup power supply. Power supply; when the main power supply is powered on, it will automatically switch to the main power supply.
所述的主电源电压检测电路和备用电源检测电路分别用于检测主电源和备用电源的供电电路上的电压并传输给主控MCU。The main power supply voltage detection circuit and the backup power supply detection circuit are respectively used to detect the voltages on the power supply circuits of the main power supply and the backup power supply and transmit them to the main control MCU.
所述的主控MCU根据主电源电压检测电路发送的主电源电压检测信号和备用电源电压检测电路发送的备用电源电压检测信号，给出当前供电电路工作状态指示：The main control MCU gives the current power supply circuit working state indication according to the main power supply voltage detection signal sent by the main power supply voltage detection circuit and the backup power supply voltage detection signal sent by the backup power supply voltage detection circuit:
（1）当检测到是主电源供电时，如果备用电源电压检测电路输出的电压与主电源电压检测电路输出的电压相近，会引起主电源给备用电源供电的情况，则第二反向截止电路异常，MCU给出第二反相节制电路异常工作状态指示；(1) When it is detected that the main power supply is powered, if the output voltage of the backup power voltage detection circuit is similar to the output voltage of the main power voltage detection circuit, it will cause the main power supply to the backup power supply, the second reverse cut-off circuit Abnormal, the MCU gives an indication of the abnormal working state of the second inverting control circuit;
（2）当检测到是主电源供电时，如果备用电源电压检测电路输出的电压为备用电源正常检测电压，则自动电压检测与切换电路异常，MCU给出自动电压检测与切换电路异常工作状态指示；(2) When the main power supply is detected, if the output voltage of the backup power voltage detection circuit is the normal detection voltage of the backup power supply, the automatic voltage detection and switching circuit is abnormal, and the MCU will give an indication of the abnormal working status of the automatic voltage detection and switching circuit ;
（3）当检测到时备用电源供电时，如果检测到主电源电压检测电路输出的电压与备用电源电压检测电路输出的电压相近，会引起备用电源给主电源供电的情况，则第一反向截止电路异常，MCU给出第一反向截止电路异常工作状态指示。(3) When the standby power supply is detected, if it is detected that the output voltage of the main power supply voltage detection circuit is similar to the output voltage of the backup power supply voltage detection circuit, it will cause the backup power supply to the main power supply, then the first reverse The cut-off circuit is abnormal, and the MCU gives an indication of the abnormal working state of the first reverse cut-off circuit.
所述的主控MCU的型号为MSP430。The model of the main control MCU is MSP430.
所述的外部备用电源为干电池。The external backup power supply is a dry battery.
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Address after: 610199 Longquanyi, Sichuan Province Industrial Park licensing Patentee after: Chengdu Qinchuan networking Polytron Technologies Inc Address before: 610199 Longquanyi, Sichuan Province Industrial Park licensing Patentee before: Chengdu Taichuan Technology Development Co., Ltd. |