A digital measuring instrument that obtains electric energy from the electric signal under test

Abstract

A digital measurement instrument of obtaining electric energy from a measured electric signal can obtain the electric energy from the measured electric signal according to situations during a measurement process to store the electric energy into an energy storage element to use, under the premise of not influencing a measurement precision, with the assist of a charging energy storage circuit in parallel connection with a measuring terminal of the instrument and a microcontroller in the instrument, and according to the energy attribute of the measured signal, thereby solving the awkward problem that a conventional portable electricity class digital measurement instrument can not be used when a battery is exhausted, and improving the use efficiency of the measurement instrument.

Description

technical field [0001] The invention relates to a digital measuring instrument for obtaining electric energy from a measured electric signal, which is used to overcome the deficiency that the conventional portable electric digital measuring instrument cannot realize its original measuring function when the battery is exhausted. Background technique [0002] In the field of electronics and electrical technology, electrical measuring instruments represented by portable multimeters are indispensable tools in design and development, production and maintenance. With the increasing popularity of digital technology, most of these electrical measuring instruments have also been digitally upgraded, which has brought a series of gratifying conveniences to the measurement work. Just the embarrassment of not being able to work. Taking the multimeter as an example, the earlier pointer type does not need the support of the built-in battery of the meter because of its electromagnetic prin...

AI Technical Summary

Problems solved by technology

But this solution only changes the operation of replacing the battery to a charging operation when the battery is used up, and the measurement function of the multimeter is still in a state of strike when charging

In addition, this scheme has three disadvantages: one is that it is often difficult for the meter to find the mains network and socket terminals that meet the charging requirements at the measurement site; Some kind of burden. The third is that if the charging module is placed inside the machine, the portability of the instrument will be reduced. If it is placed outside the machine, it is easy to forget to carry the charging accessories.

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