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USB interface load testing device

A USB interface and load testing technology, applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve problems such as errors, measurement damage, and current disturbances, and achieve the effects of small errors, improved measurement accuracy, and strong compatibility

Inactive Publication Date: 2016-11-23
西可通信技术设备(河源)有限公司
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Problems solved by technology

[0004] However, when testing the load capacity of the USB interface, it is necessary to connect the USB interface to the load of the measurement circuit to see if it is still within the allowable range. The design principle of this measurement method is passive measurement, that is, the measurement principle is to assume that the load resistance Constant, calculate the load with the assumed value, which will lead to a large error in the test, and will cause measurement damage due to current disturbance

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Embodiment

[0016] see figure 1 and figure 2 , the present invention provides a technical solution: a USB interface load testing device, including a USB interface 1, the USB interface 1 is connected with a detector 2, and a safety capacitor 12 is also installed in parallel between the USB interface 1 and the detector 2 It is connected in series with the anti-skid resistor 13, the safety capacitor 12 and the protective resistor 13, and can protect the USB13 under test from being damaged when the current and voltage in the measurement circuit are abnormal. The detector 2 is composed of a current detector 3 and a voltage detector 4. The current and voltage in the circuit to be tested can be measured respectively. The current detector 3 and the voltage detector 4 are equipped with a load measurement range selector 11, which can automatically select the measurement range according to the current and voltage intensity in the measurement circuit. While measuring the range, the measurement accu...

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Abstract

The invention discloses a USB interface load testing device, comprising a USB interface, the USB interface is connected with a detector, the detector is composed of a current detector and a voltage detector, and the current detector is directly connected with a variable resistor , a voltage detector is connected in parallel on the variable resistor, the current detector and the voltage detector are connected with a data converter, and an electric signal amplifier is also installed on the data converter, and the electric signal amplifier is connected with a single-chip microcomputer, The single-chip microcomputer is connected with a display, has strong compatibility, can actively adapt to USB interfaces with different load values, and has a more accurate resistance value, which can better adapt to the measured object, making the measurement more accurate, with small errors, and directly transfers the measured mechanical signal It is converted into an electrical signal, and after being amplified, it is processed by a single-chip microcomputer to directly give the load capacity of the USB interface, which is more convenient, and the added safety capacitor and protective resistor are more safe and efficient.

Description

technical field [0001] The invention relates to a load testing device, in particular to a USB interface load testing device. Background technique [0002] With the advent of the modern information society, people's demand for computer products is increasing, and the application of transmission and exchange between various data is becoming more and more extensive. Therefore, the types of USB interface devices used to transmit data are also increasing. However, the load capacity of the USB interface of each computer is different. A USB interface with a good load capacity will drive more USB devices, and a USB interface with a poor load capacity will have poor compatibility with USB devices. Therefore, The premise of modern data transmission is to simply, intuitively and safely measure the load capacity of the USB interface. [0003] Therefore, an intelligent device for detecting the load capacity of the USB interface is developed, through which the load capacity of the USB in...

Claims

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Application Information

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IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 何宁宁
Owner 西可通信技术设备(河源)有限公司
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