Current detection method, current detection device and water meter

Abstract

The invention provides a current detection method, a current detection device and a water meter, and aims to obtain the average current of a load in a detection time period by detecting the voltage change of a capacitor so as to represent the power consumption of the load. According to the current detection method provided by the invention, a current sampling and amplifying conditioning circuit and a detection mode switching control circuit are not needed, so that the problem of easy interference caused by weak signal detection is avoided, the problem of load voltage drop during mode switchingis also avoided, the introduced power consumption is low, and the performance of low power consumption of an electronic product is favorably improved.

Description

technical field [0001] The invention belongs to the technical field of current detection, and in particular relates to a current detection method, a current detection device and a water meter. Background technique [0002] The power consumption performance of electronic products has attracted more and more attention and attention from researchers and users of electronic products. Therefore, the power supply current of electronic products needs to be detected as a characteristic parameter of its power consumption. For example, in the existing smart water meter, in order to ensure that the product meets the low power consumption requirement when it leaves the factory, it is necessary to detect the battery power supply current of the electronic module in the smart water meter. [0003] figure 1 It is a schematic diagram of the main power supply circuit of the existing smart water meter. In order to improve the instantaneous current output capability, a large-capacity capacitor...

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Problems solved by technology

[0004] In view of this, the present invention provides a current detection method, a current detection device and a water meter t

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