Equipment power consumption acquiring device with various interfaces

Abstract

An equipment power consumption acquiring device with various interfaces comprises a plurality of interfaces connected with a sampling amplifying circuit through sampling signal lines, an oscilloscope connected with the output end of the sampling amplifying circuit, and a microcontroller connected with the interfaces through data control lines. A relay or variable resistor is arranged between the interfaces and the sampling amplifying circuit and outputs analog signals from the interfaces to the sampling amplifying circuit, a GPIO port of the microcontroller is connected with a grid of an isolation MOS tube and controls connection and disconnection of the isolation MOS tube, a drain of the isolation MOS tube is connected with a first ground line, and a source is connected with a second ground line. On a same circuit board (in a same device) can acquire power variation information of equipment of various interfaces respectively (asynchronously), and power consumption variation of the equipment to be measured can be completely accurately recorded in real time. Meanwhile, by the equipment power consumption acquiring device, the physical structure of the equipment to be measured can be kept original without damage.

Description

technical field [0001] The invention relates to a technology in the field of electrical equipment detection, and is a device equipped with multiple interfaces that can communicate with different interfaces of the equipment to be tested, and can accurately collect the power consumption change information of the equipment to be tested when it is working. . Background technique [0002] In the field of security technology, power consumption analysis has become an effective attack method, and the interface forms of security encryption devices are also diversified, such as: smart card interface, SPI (serial peripheral) interface, USB (universal serial bus) interface, SCI (serial line communication) interface, SDIO (safety digital input and output) interface, etc. The power consumption of devices with different interface forms is different, and the working voltage and current of the interface are also different. When collecting power consumption of different interface devices, be...

AI Technical Summary

Problems solved by technology

However, the disadvantages of this technology are: 1: For different interfaces, different interface software and hardware designs are required

However, the defects of this technology are: 1: real-time response to the power consumption change of the USB interface device during the communication process

2: Other signals will be introduced, which will affect the analysis of the power consumption waveform

3: Real power consumption changes when other interface devices cannot be tested

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