CN202584107U

CN202584107U - Automatic power supply calibration device

Info

Publication number: CN202584107U
Application number: CN 201220199712
Authority: CN
Inventors: 杨龙海; 孙永刚; 亓玉青; 黄昌宾
Original assignee: China Great Wall Computer Shenzhen Co Ltd
Current assignee: China Great Wall Science And Technology Group Ltd By Share Ltd
Priority date: 2012-05-07
Filing date: 2012-05-07
Publication date: 2012-12-05
Anticipated expiration: 2022-05-07

Abstract

The utility model belongs to the technical field of power supplies, and in particular relates to an automatic power supply calibration device. The automatic power supply calibration device based on a PMbus protocol comprises a computer module, an adjustable alternating current power module, a standard linear load, a standard voltage and current meter and a display module, wherein the computer module reads voltage values and current values of two different points of a power supply to be calibrated through a PMbus bus, quickly calculates calibration parameters through programs and then transmits the calibration parameters to a micro control unit (MCU) in the power supply to be calibrated; the MCU stores and calls the calibration parameters to calibrate voltage, current and power; and therefore, qualified power which meets the precision requirement can be output. By the automatic power supply calibration device, the shortcomings of complicated operation, low efficiency, low precision and the like in the conventional manual calibration are overcome; the production efficiency is obviously improved; and the precision is greatly guaranteed.

Description

A kind of power supply self-checking device

Technical field

The utility model belongs to power technique fields, relates in particular to a kind of power supply self-checking device.

Background technology

At present; Begun the power supply that uses band PMbus function in enormous quantities in the server power supply field, principal feature working temperature, blower fan revolution that to be mainboard read WV, electric current, power, the power supply of power supply through the PMbus bus with and information such as duty.The voltage that is specifically related to, electric current and power etc. all have accuracy requirement, in the production technology of power supply, need calibrate the parameter of power supply.In practical operation, generally need measure two PMbus read values under different voltages, electric current or the power manually, the substitution calibration equation calculates calibration parameter then; Calibration factor is solidificated in the software burning goes into power supply and accomplishes parametric calibration; This operation to the staff is strict, need use the instrument non-productive operation simultaneously, and process is complicated, the calibration accurate rate is lower; And inefficiency, be unfavorable for large-scale production.On the other hand, along with the progress of science and technology, the more functions of power supply needs the parameter information of debugging to increase, and pure operation manually can not be satisfied the requirement to calibration accuracy and production efficiency gradually.

The utility model content

The purpose of the utility model is to provide a kind of power supply self-checking device, is intended to solve that the existing manual manual calibration is not high based on the degree of accuracy that the power parameter of PMbus agreement exists, the technical matters of inefficiency.

The utility model is achieved in that a kind of power supply self-checking device, comprises a computer module that links to each other with power supply to be calibrated, and said power supply self-checking device also comprises:

The instruction of joining with said computer module, send according to said computer module provides the adjustable ac source module of different operating voltage;

Be connected the normal linearity load of instruction formation different loads power between said computer module and the said power supply to be calibrated, that the said computer module of reception sends;

Supply voltage and electric current that join with said computer module, said power supply to be calibrated and said adjustable ac source module respectively, the said power supply to be calibrated of sampling are also given the data transmission that collects in the normal voltage reometer of said computer module; And

The display module that joins with said computer module, the calculating process and the result of said computer module shown.

Further, be connected through the PMbus bus between said computer module and the said power supply to be calibrated and communicate by letter.

The power supply self-checking device that the utility model provides; Utilize computer module to read the voltage and current value of different 2 of power supply to be calibrated through the PMbus bus; Calculate calibration parameter fast through program; Through the PMbus bus calibration factor is transferred to the inner MCU (microprocessor) of power supply to be calibrated again, the MCU storage is also called the calibration that this calibration parameter is accomplished voltage, electric current and power, so just can export the qualified power supply that meets accuracy requirement.The power supply self-checking device that the utility model provides has overcome the also not high defective of complicated operation, inefficiency, degree of accuracy that traditional-handwork is calibrated, and not only production efficiency significantly improves, and degree of accuracy is also guaranteed greatly.

Description of drawings

Fig. 1 is the structured flowchart of the power supply self-checking device that provides of the utility model embodiment.

Embodiment

For the purpose, technical scheme and the advantage that make the utility model is clearer,, the utility model is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.

The power supply self-checking device that the utility model provides; Utilize computer module to read the voltage and current value of different 2 of power supply to be calibrated through the PMbus bus; Calculate calibration parameter fast through program; Through the PMbus bus this calibration factor is transferred to the inner MCU (microprocessor) of power supply to be calibrated again, accomplishes the calibration of voltage, electric current and the power of treating power calibration, so just can export the qualified power supply that meets accuracy requirement.

Fig. 1 is the structured flowchart of a kind of power supply self-checking device of providing of the utility model embodiment, for the ease of explanation, only shows the part relevant with the utility model embodiment.With reference to Fig. 1, explain as follows:

A kind of power supply self-checking device links to each other with power supply 20 to be calibrated, comprises computer module 11, adjustable ac source module 12, normal linearity load 13, normal voltage reometer 14 and display module 15;

Wherein, computer module 11 links to each other, communicates each other with power supply 20 to be calibrated;

Adjustable ac source module 12 links to each other with computer module 11, normal voltage reometer 14 respectively, and the instruction of under different situations, sending according to computer module 11 provides different operating voltages;

Normal linearity load 13 is connected between computer module 11 and the power supply to be calibrated 20, and the current-order that receiving computer module 11 is sent forms different loads power;

Normal voltage reometer 14 joins with power supply to be calibrated 20, computer module 11 and adjustable ac source module 12 respectively, treats the supply voltage of power calibration 20 and electric current is sampled and give computer module 11 with the data transmission that collects;

Display module 15 connects computer module 11, the calculating process and the operation result of computer module 11 is shown, so that staff's examination.

As preferred embodiment, be connected through the PMbus bus between computer module 11 and the power supply 20 to be calibrated and communicate by letter.

The power supply self-checking device that provides according to the utility model embodiment; Its principle of work is based on: the voltage and current data that normal voltage reometer 14 samples are the data of approximately linear; Utilize linear functional relation formula y=kx+b; As long as find the data of two groups of x and y, just can determine the value of calibration factor k and side-play amount b, and these two parameters passed to the MCU of power supply to be calibrated through the PMbus bus; The MCU of power supply to be calibrated calibrates the raw data x (voltage or electric current) that collects by the linear functional relation formula, the standard value y (corresponding voltage or electric current) after can obtaining calibrating.

Particularly, to implement the course of work of calibration following for the power supply self-checking device that provides of the utility model embodiment voltage of treating power calibration 20:

Computer module 11 sends instruction and gives adjustable ac source module 12; Make it provide first magnitude of voltage (like 110V); For reducing the voltage of line loss; Computer module 11 sends 0 current-order simultaneously and gives normal linearity load 13, guarantees that its bearing power is 0, makes the purpose that reaches unloaded calibration voltage; And send start-up command through the PMbus bus and give the power supply to be calibrated 20 that joins with it; The MCU of power supply 20 to be calibrated receives that unlatching primary power in instruction back gets into normal operating conditions, and the normal voltage reometer 14 that computer module 11 reads this moment obtains first magnitude of voltage y1, reads first magnitude of voltage x1 that power supply 20 to be calibrated samples through the PMbus bus simultaneously.Then, computer module 11 sends shutdown command and gives power supply 20 to be calibrated, and the MCU of power supply 20 to be calibrated closes primary power after receiving instruction;

Computer module 11 is redispatched instruction for the second time to adjustable ac source module 12, makes it provide second magnitude of voltage (like 220V), sends 0 current-order simultaneously and gives normal linearity load 13, sends start-up command through the PMbus bus then and gives power supply 20 to be calibrated.The MCU of power supply 20 to be calibrated opens primary power entering normal operating conditions after receiving instruction once more; The normal voltage reometer 14 that computer module 11 reads this moment again obtains second magnitude of voltage y2; Read second magnitude of voltage x2 that power supply 20 to be calibrated samples through the PMbus bus simultaneously; Then, computer module 11 sends shutdown command and gives power supply 20 to be calibrated, and the MCU of power supply 20 to be calibrated closes primary power after receiving instruction once more;

Computer module 11 is according to linear functional relation formula y=kx+b; With above-mentioned two groups of data substitutions of obtaining; Computing obtains the calibration factor k and the side-play amount b of voltage; Again these two parameters are sent to the MCU of power supply 20 to be calibrated through the PMbus bus, the MCU of power supply 20 to be calibrated receives to store into when corresponding position supplies work after the data and calls, thereby accomplishes the calibration process of voltage.

Similar with the calibration process of voltage, the course of work that the electric current that the power supply self-checking device that utilizes the utility model to provide is treated power calibration 20 is implemented calibration is following:

Computer module 11 sends instruction and provides normal working voltage (like 220V) for adjustable ac source module 12; Simultaneous computer module 11 is sent first load current and is instructed to normal linearity load 13; Obtain first group of bearing power; Send start-up command through the PMbus bus then and give power supply 20 to be calibrated; The MCU of power supply 20 to be calibrated receives instruction back unlatching primary power operate as normal, and computer module reads normal voltage reometer 14 and obtains first current value y1, reads first current value x1 that power supply 20 to be calibrated samples through the PMbus bus simultaneously; Send shutdown command through the PMbus bus again, the MCU of power supply 20 to be calibrated closes primary power after receiving instruction;

Computer module 11 second load current of redispatching instructs to normal linearity load 13 then; Obtain second group of bearing power; Computer module 11 sends once more start-up command through the PMbus bus and gives power supply 20 to be calibrated; The MCU of power supply 20 to be calibrated receives instruction back unlatching primary power operate as normal, and computer module reads normal voltage reometer 14 and obtains second current value y2, reads second current value x2 that power supply 20 to be calibrated samples through the PMbus bus; Send shutdown command through the PMbus bus again, the MCU of power supply 20 to be calibrated closes primary power after receiving instruction;

Computer module 11 is equally according to linear functional relation formula y=kx+b; Bring above two groups of data into calibration factor k ' and side-play amount b ' that computing obtains electric current; Again these two parameters are sent to power supply 20 to be calibrated through the PMbus bus; The MCU of power supply 20 to be calibrated receives when storing corresponding position after the data into supplies work and calls, thereby accomplishes the calibration process of electric current.

The calibration of the voltage and current of treating power calibration 20 can be accomplished through above two calibration processes, the calibration accuracy of expecting can be realized after calibration is accomplished.

The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Although the utility model has been carried out more detailed explanation with reference to previous embodiment; For a person skilled in the art, it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, or part technical characterictic wherein is equal to replacement.Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection domain of the utility model.

Claims

1. a power supply self-checking device comprises a computer module that links to each other with power supply to be calibrated, it is characterized in that, said power supply self-checking device also comprises:

2. power supply self-checking device as claimed in claim 1 is characterized in that, is connected through the PMbus bus between said computer module and the said power supply to be calibrated and communicates by letter.