There is no limit to creativity, and the instrument is invented. Today, I will introduce a national invention patent, a dual power supply circuit for remote control smart gas meters. The patent was filed by Chengdu Qinchuan Technology Development Co., Ltd. and was authorized to be announced on February 22, 2017.
Description
The invention relates to a dual power supply circuit for a remote control smart gas meter.
Background of the invention
With the development of science and the improvement of science and technology, gas has become an indispensable part of our life. Gas meters have become more and more popular in people's lives. The power supply of gas meters has become a concern of manufacturers.
The traditional gas meter is powered by a single battery with a dry battery. It has some shortcomings. The traditional gas meter has a short power cycle. It may still consume power when the power is turned off. The system consumes a lot of power and the battery life is short, which may affect the normal gas meter. Use, causing some unnecessary problems.
Summary of the invention
The object of the present invention is to overcome the deficiencies of the prior art and provide a dual power supply circuit for a remote control smart gas meter that can automatically switch circuits, has low power consumption and long battery life.
The object of the present invention is achieved by the following technical solutions: a dual power supply circuit for a remote control smart gas meter, which comprises a dry battery, a lithium battery, a reverse cutoff circuit, a dry battery power supply detection circuit, a power supply switching circuit, a voltage conversion circuit, and a main Controlling the MCU, and the RF wireless module, the reverse cutoff circuit includes a reverse cutoff circuit 1, a reverse cutoff circuit 2, and a reverse cutoff circuit 3; the output terminals of the dry battery are respectively opposite to the reverse cutoff circuit 1 and the reverse cutoff circuit 2 connection, the output end of the reverse cut-off circuit 1 is connected with the dry battery power supply detecting circuit, the output end of the dry battery power supply detecting circuit is connected with the main control MCU module, the output end of the reverse cut-off circuit 2 is connected with the power supply switching circuit, and the output of the lithium battery The terminal is connected to the reverse cut-off circuit 3, and the output end of the reverse cut-off circuit 3 is respectively connected with the power supply switching circuit and the RF wireless module, and the power supply switching circuit is connected to the master MCU through the voltage conversion circuit.
Figure is a schematic block diagram of the invention
The dual power supply circuit of the remote control smart gas meter further comprises a high voltage detection circuit, wherein the input end of the high voltage detection circuit is connected to the power supply switching circuit, and the output end of the high voltage detection circuit is connected to the main control MCU. The utility model further comprises a dry battery low-voltage alarm detecting circuit, wherein the input end of the dry battery low-voltage alarm detecting circuit is connected to the reverse-cut circuit 1 , and the output end is connected to the main control MCU.
The utility model further comprises a dry battery low voltage detecting circuit, wherein the input end of the dry battery low voltage detecting circuit is connected to the reverse cutoff circuit 1, and the output end is connected to the main control MCU.
In addition, the lithium battery low-voltage detecting circuit includes an input end of the lithium battery low-voltage detecting circuit connected to the reverse-cut circuit 3, and an output end connected to the main control MCU. The master MCU is a single chip MSP430.
The invention has the beneficial effects that various voltage states can be detected by various peripheral voltage detecting circuits, and the MCU automatically processes the power; the automatic switching circuit is powered by the dry battery lithium battery to ensure that the lithium battery is used when the external dry battery is powered off. The main control MCU supplies power to avoid large leakage current between the main control MCU and the RF wireless module communication interface, further reducing system power consumption and improving battery life.
Description
The invention relates to a dual power supply circuit for a remote control smart gas meter.
Background of the invention
With the development of science and the improvement of science and technology, gas has become an indispensable part of our life. Gas meters have become more and more popular in people's lives. The power supply of gas meters has become a concern of manufacturers.
The traditional gas meter is powered by a single battery with a dry battery. It has some shortcomings. The traditional gas meter has a short power cycle. It may still consume power when the power is turned off. The system consumes a lot of power and the battery life is short, which may affect the normal gas meter. Use, causing some unnecessary problems.
Summary of the invention
The object of the present invention is to overcome the deficiencies of the prior art and provide a dual power supply circuit for a remote control smart gas meter that can automatically switch circuits, has low power consumption and long battery life.
The object of the present invention is achieved by the following technical solutions: a dual power supply circuit for a remote control smart gas meter, which comprises a dry battery, a lithium battery, a reverse cutoff circuit, a dry battery power supply detection circuit, a power supply switching circuit, a voltage conversion circuit, and a main Controlling the MCU, and the RF wireless module, the reverse cutoff circuit includes a reverse cutoff circuit 1, a reverse cutoff circuit 2, and a reverse cutoff circuit 3; the output terminals of the dry battery are respectively opposite to the reverse cutoff circuit 1 and the reverse cutoff circuit 2 connection, the output end of the reverse cut-off circuit 1 is connected with the dry battery power supply detecting circuit, the output end of the dry battery power supply detecting circuit is connected with the main control MCU module, the output end of the reverse cut-off circuit 2 is connected with the power supply switching circuit, and the output of the lithium battery The terminal is connected to the reverse cut-off circuit 3, and the output end of the reverse cut-off circuit 3 is respectively connected with the power supply switching circuit and the RF wireless module, and the power supply switching circuit is connected to the master MCU through the voltage conversion circuit.
Figure is a schematic block diagram of the invention
The dual power supply circuit of the remote control smart gas meter further comprises a high voltage detection circuit, wherein the input end of the high voltage detection circuit is connected to the power supply switching circuit, and the output end of the high voltage detection circuit is connected to the main control MCU. The utility model further comprises a dry battery low-voltage alarm detecting circuit, wherein the input end of the dry battery low-voltage alarm detecting circuit is connected to the reverse-cut circuit 1 , and the output end is connected to the main control MCU.
The utility model further comprises a dry battery low voltage detecting circuit, wherein the input end of the dry battery low voltage detecting circuit is connected to the reverse cutoff circuit 1, and the output end is connected to the main control MCU.
In addition, the lithium battery low-voltage detecting circuit includes an input end of the lithium battery low-voltage detecting circuit connected to the reverse-cut circuit 3, and an output end connected to the main control MCU. The master MCU is a single chip MSP430.
The invention has the beneficial effects that various voltage states can be detected by various peripheral voltage detecting circuits, and the MCU automatically processes the power; the automatic switching circuit is powered by the dry battery lithium battery to ensure that the lithium battery is used when the external dry battery is powered off. The main control MCU supplies power to avoid large leakage current between the main control MCU and the RF wireless module communication interface, further reducing system power consumption and improving battery life.
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