Gas meter lithium battery electric quantity consumption detection system and method

Abstract

The invention discloses a gas meter lithium battery electric quantity consumption detection system and method, and relates to the technical field of intelligent gas meter lithium battery detection. A farad capacitor E1 connected with a voltage regulator U1 is charged through a sampling resistor R1, a sampling resistor R2 and a sampling resistor R3, the sampling resistor R2 and the sampling resistor R3 are connected with a switch control SWITCH1, the output end of the voltage regulator U1 is connected with the VCC end of the micro-control unit MCU, and the output end of the differential operational amplifier OPA1 is connected with the ADC0 end of the micro-control unit MCU. The system and the method are used for accurately detecting the electric quantity of the disposable lithium battery power supply of the intelligent gas meter in use in real time.

Description

technical field [0001] The invention relates to the technical field of detection of lithium batteries of intelligent gas meters, in particular to a system and method for detecting the power consumption of lithium batteries of gas meters. Background technique [0002] At present, domestic smart gas meters mainly include IC card smart gas meters, CPU card smart gas meters, radio frequency card smart gas meters, direct-reading remote gas meters (wired remote meters) and wireless remote gas meters (integrated), etc. These categories, and with the improvement of people's living standards and quality of life, the demand for intelligent products required by modern families will promote the development of smart gas meters in the direction of safety, reliability, and smart convenience. [0003] A smart gas meter usually needs its own power supply circuit to realize its smart functions. When a smart gas meter uses a dry battery as a power source, it often judges that the power supply ...

AI Technical Summary

Problems solved by technology

[0003] A smart gas meter usually needs its own power supply circuit to realize its smart functions. When a smart gas meter uses a dry battery as a power source, it often judges that the power supply is sufficient, the power supply is undervoltage, or the power is cut off by measuring the power supply voltage; and when using a disposable lithium battery as a When using the power supply, the power of the battery cannot be judged simply by the voltage, because the full power of the lithium battery is only 3.7V at most, and the voltage is also 3.5V when the power is exhausted; and for the purpose of ensuring normal use, the gas company usually needs to know accurately How much power is left in the lithium batteries used in its distribution

[0004] In the existing technical solutions, most gas companies only report the remaining power of lithium batteries used in smart gas meters as perceptual values, such as: 90%, 10% and 5%, and there are no other values ​​or other values Random value, which is not conducive to the gas company to accurately grasp the remaining power of the lithium battery used in the smart gas meter it uses, which may lead to untimely replacement, and the need to set up a separate manual monitoring replacement to increase the cost of use

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