Mobile phone capable of measuring resistance

Abstract

The invention discloses a mobile phone capable of measuring the resistance, which comprises a chip, a four-segment earphone socket and a voltage-division detecting module, and is characterized in that an ADC module is integrated on the chip, four segments of the earphone socket are a left channel, a right channel, a reference ground and an earphone microphone; the reference ground segment of the earphone socket is connected with a reference ground of a mobile phone circuit board; an output end of the voltage-division detecting module is electrically connected with the earphone microphone segment, and the ADC module is electrically connected to an input end and an output end of the voltage-division detecting module; the reference ground segment and the earphone microphone segment of the earphone socket are used for being electrically connected to two ends of an external resistor to be measured; and the ADC module acquires voltage at the input end and the output end of the voltage-division detecting module, and acquires a resistance value of the resistor to be measured according to a resistance value of the voltage-division detecting module. According to the invention, the four-segment earphone socket and a microprocessor of the intelligent mobile phone are utilized, and a biasing circuit required by different grades of measured resistors is designed, so that the small resistance measurement precision is improved. Compared with a conventional method of measuring the resistance by using a multimeter, the mobile phone disclosed by the invention has the advantages of high precision and convenient carrying.

Description

technical field [0001] The invention relates to the field of measuring equipment, in particular to a mobile phone capable of measuring resistance. Background technique [0002] The conventional method of measuring resistance with a multimeter is based on the multimeter device. The red and black probes of the multimeter are in contact with both ends of the object to be measured, and the resistance value is read from the dial or display of the multimeter. Therefore, the method of measuring resistance based on the multimeter requires the measuring device of the multimeter. [0003] Ordinary multimeters have low measurement accuracy and cannot measure milliohm-level resistance. Compared with smartphones, ordinary multimeters are larger in size and inconvenient to carry, requiring regular battery replacement. With the development of mobile terminals, especially the development of smart phones, smart phones have become a standard configuration for members of modern society. Suppor...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a mobile phone capable of measuring resistance, which is used to solve the problems in the prior art that the multimeter used to measure resistance is inconvenient to carry and the measurement accuracy is not high

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