CN103968805A - Method for testing and correcting altitude for working of server by virtue of back pressure of fan - Google Patents
Method for testing and correcting altitude for working of server by virtue of back pressure of fan Download PDFInfo
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- CN103968805A CN103968805A CN201410244275.XA CN201410244275A CN103968805A CN 103968805 A CN103968805 A CN 103968805A CN 201410244275 A CN201410244275 A CN 201410244275A CN 103968805 A CN103968805 A CN 103968805A
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- fan
- server
- rotation speed
- barometer
- pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
- G01C5/06—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels by using barometric means
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- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention provides a method for testing and correcting the altitude for working of a server by virtue of the back pressure of a fan and belongs to the field of computer communication. The method provided by the invention has the advantages that the performance change rule of the fan and the barometric change rule are adopted as theoretical support points, and the high-accuracy reading of altitude is carried out according to detection and calculation of the working state of the fan and the correction of readings of a barometer, so that real altitude information can be obtained, and not only is the requirement of the design met, but also the altitude reading accuracy is improved.
Description
technical field
The present invention relates to computer communication field, specifically utilize a kind of method of utilizing fan back pressure to carry out the correction of server operating altitude high measure, solve server and cause the problem that sea level elevation counting accuracy is lower because of fan work.
Background technology
Part software application starts to be applied to sea level elevation at present, and therefore part server user has proposed this aspect demand at present, and different altitude height atmospheric density changes in addition, affects server radiating situation.
In the place of Different Altitude, the density of air is not identical, and what brought thus is exactly the difference of required air quantity of dispelling the heat, the regional atmospheric density that height above sea level is higher is less, atmospheric pressure reduction increases air coefficient of viscosity, and air molecule number will reduce, thereby causes the heat transmitting to reduce.This is to get by molecular collision transferring energy because cross-ventilation conducts heat, and heat transference efficiency will reduce like this, and the heat dispersion of electronic unit becomes poorer.On the height of 5000M, coefficient of heat emission will decline 21% than the value on sea level, and the heat that heat loss through convection transmits also will decline 21%.On the height of 10000M, will reach 40%.The heat of heat loss through convection transmission reduces and will cause the increase of product temperature rise.Therefore the equipment cooling in high altitude localities reduces.The equipment of data center is in operation and all can produces heat, because the molecular amounts of regional area reduces, makes the temperature of heater element be not easy to dissipate, and causes equipment local temperature rise too high, if heat radiation will cause part of devices to burn out not in time.Height above sea level is higher, and air is thinner, and the intensity of insulating medium will decrease, and this will make equipment easily discharge, and causes common insulation distance to become not enough.Easily there is condensation in the area of height above sea level, reduces the creepage distance of electronic equipment.The insulating device performance of data center's electronic equipment also can decline.
In the higher place of height above sea level, thereby system is carried out cooling with regard to needing the fan of server to rev up to produce larger air quantity, avoid the overheated stability problem causing.Can suitably reduce rotating speed in the area of low height above sea level and save the consumption of electric energy, and extend the life-span of fan.
Need for above-mentioned reasons heat sink conception to carry out corresponding modify, above demand has all proposed the requirement that sea level elevation is measured, because atmospheric pressure is with changing with sea level elevation, therefore can utilize barometer to carry out the measurement of sea level elevation, in new Server development design, increase barometer element, but because server product is forced convertion heat radiation product, when the work of internal heat dissipating fan component, can cause the variation of air pressure, and then affect sea level elevation measure accuracy, need to revise the barometer value of reading, ensure the accuracy that sea level elevation is measured.
Summary of the invention
The present invention is using fan performance Changing Pattern and air pressure change rule as theory support point, reads by the high precision that fan work state-detection is calculated and sea level elevation is carried out in the correction of barometer reading, and concrete summary of the invention can be divided into following two aspects:
A) according to fan performance P-Q curve and server flow resistance curve calculation fan work point, according to Changing Pattern calculative determination fan work point place's back pressure and the rotation speed of the fan rule formula of air quantity of fan, blast and rotating speed, and then the change amount of test confirmation fan real work to atmospheric pressure, this numerical value is relevant to rotation speed of the fan.
B) server baseboard management controller obtains barometer reading and rotation speed of the fan information, according to fan back pressure, air pressure change amount and rotation speed of the fan relation formula are calculated to the actual change amount of air pressure of obtaining, it is the actual ambient pressure value in this place that barometer reading deducts this change numerical quantity, utilizes sea level elevation and atmospheric pressure relation formula to calculate and obtains actual sea level elevation.
Specific works step is as follows:
1) set for this platform;
2) testing server flow resistance curve and fan P-Q curve, calculates fan work point;
3) calculate fan back pressure and rotation speed of the fan Changing Pattern;
4) determine barometer reading variable quantity and rotation speed of the fan Changing Pattern;
5) read barometer reading and rotation speed of the fan;
6) calculate the actual change amount of air pressure;
7) barometer reading is repaiied card.
At platform high-end server mainboard, barometer assembly is installed, barometer is positioned at fan rear; Fan performance curve and server flow resistance point of crossing are fan real work point.
Server B MC reads barometer numerical value and rotation speed of the fan, calculates fan back pressure and real atmosphere pressure according to formula, calculates sea level elevation according to atmospheric pressure and height above sea level relational expression.
The invention has the beneficial effects as follows:
Utilize fan P-Q curve and server flow resistance curve to determine fan work point, and according to Changing Pattern calculative determination fan work point place's back pressure and the rotation speed of the fan rule formula of air quantity of fan, blast and rotating speed, determine atmospheric pressure correction formula, reduced the complicacy of atmospheric pressure value correction.
Determine pressure correction according to rotation speed of the fan, and use barometer reading to deduct correction to determine extraneous actual pressure value, utilize height above sea level air pressure change rule to calculate and obtain sea level elevation, improve the degree of accuracy that height above sea level is measured, provide guidance more accurately to software application parameter and server radiating regulation and control.
Brief description of the drawings
Accompanying drawing 1 is measurement process flow diagram of the present invention;
Accompanying drawing 2 is fan performance P-Q curve and server flow resistance curve synoptic diagram.
Embodiment
By following steps, the present invention is described in further detail,
Specific works step is as follows:
1) build grantley platform;
2) testing server flow resistance curve and fan P-Q curve, calculates fan work point;
3) calculate fan back pressure and rotation speed of the fan Changing Pattern;
4) determine barometer reading variable quantity and rotation speed of the fan Changing Pattern;
5) read barometer reading and rotation speed of the fan;
6) calculate the actual change amount of air pressure;
7) barometer reading is repaiied card.
Grantley platform high-end server mainboard is installed barometer assembly, and barometer is positioned at fan rear.Fan
Performance curve and server flow resistance point of crossing are fan real work point.
A) measure fan performance P-Q curve and server flow resistance curve, calculate and obtain fan work dot information;
B) determine server fan inside back pressure and rotation speed of the fan rule formula according to fan P-Q curve with fan rotation speed change rule, and then definite barometer reading variable quantity and rotation speed of the fan rule formula.
C), when server is worked, baseboard management controller reads barometer reading and rotation speed of the fan information.
D) calculate the actual change amount of air pressure, barometer reading deducts this change amount and obtains true ambient pressure value.
E) utilize sea level elevation and atmospheric pressure relation formula to calculate and obtain actual sea level elevation.
In the time of system works, server collocation fan back pressure (Pa) is closed with rotating speed (PWM) and is: P
fan=2*10
-6* PWM
2+ 0.0039*PWM-10.Get rid of external interference, atmospheric pressure (Pa) is P=101300-10h with the pass of height above sea level (h), and barometer is positioned at fan rear portion, and reading is P
read=P+P
fan, server collocation fan maximum (top) speed 10000 turns, fan back pressure 277Pa while work in system, and if do not revised, when fan maximum (top) speed, sea level elevation error reaches 277 meters.Makeover process is: server B MC reads barometer numerical value and rotation speed of the fan, calculates fan back pressure P according to formula
fanpress P=P with real atmosphere
read-P
fan, according to atmospheric pressure and height above sea level relational expression calculating sea level elevation be: h=(101300-P)/10.
Determine associated change rule and utilize fan back pressure to carry out the correction of barometer reading through detailed above testing research, we can obtain real sea level elevation information, have not only reached the requirement of design, and have improved sea level elevation and read precision.
Claims (4)
1. utilize fan back pressure to carry out a method for server operating altitude high measure correction, it is characterized in that the present invention can be divided into following two aspects:
A) according to fan performance P-Q curve and server flow resistance curve calculation fan work point, according to Changing Pattern calculative determination fan work point place's back pressure and the rotation speed of the fan rule formula of air quantity of fan, blast and rotating speed, and then the change amount of test confirmation fan real work to atmospheric pressure, this numerical value is relevant to rotation speed of the fan;
B) server baseboard management controller obtains barometer reading and rotation speed of the fan information, according to fan back pressure, air pressure change amount and rotation speed of the fan relation formula are calculated to the actual change amount of air pressure of obtaining, it is the actual ambient pressure value in this place that barometer reading deducts this change numerical quantity, utilizes sea level elevation and atmospheric pressure relation formula to calculate and obtains actual sea level elevation.
2. method according to claim 1, is characterized in that specific works step is as follows:
1) set for this platform;
2) testing server flow resistance curve and fan P-Q curve, calculates fan work point;
3) calculate fan back pressure and rotation speed of the fan Changing Pattern;
4) determine barometer reading variable quantity and rotation speed of the fan Changing Pattern;
5) read barometer reading and rotation speed of the fan;
6) calculate the actual change amount of air pressure;
7) barometer reading is repaiied card.
3. method according to claim 2, is characterized in that, at platform high-end server mainboard, air pressure is installed
Meter assembly, barometer is positioned at fan rear; Fan performance curve and server flow resistance point of crossing are fan real work point.
4. according to the method in claim 2 or 3, it is characterized in that server B MC reads barometer numerical value and rotation speed of the fan, calculate fan back pressure and real atmosphere pressure according to formula, calculate sea level elevation according to atmospheric pressure and height above sea level relational expression.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410244275.XA CN103968805B (en) | 2014-06-04 | 2014-06-04 | Method for testing and correcting altitude for working of server by virtue of back pressure of fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410244275.XA CN103968805B (en) | 2014-06-04 | 2014-06-04 | Method for testing and correcting altitude for working of server by virtue of back pressure of fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103968805A true CN103968805A (en) | 2014-08-06 |
| CN103968805B CN103968805B (en) | 2017-02-15 |
Family
ID=51238602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410244275.XA Active CN103968805B (en) | 2014-06-04 | 2014-06-04 | Method for testing and correcting altitude for working of server by virtue of back pressure of fan |
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| CN (1) | CN103968805B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106909209A (en) * | 2017-02-28 | 2017-06-30 | 郑州云海信息技术有限公司 | A kind of height above sea level modification method and system for server fan regulation and control |
| CN108318096A (en) * | 2018-03-29 | 2018-07-24 | 上海市建筑科学研究院 | A kind of power type back pressure compensation device suitable for air quantity shield |
| CN115289684A (en) * | 2022-06-30 | 2022-11-04 | 芜湖美的智能厨电制造有限公司 | Control method, water heater and computer readable storage medium |
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| US7538509B1 (en) * | 2008-08-15 | 2009-05-26 | International Business Machines Corporation | Controlling the speed of cooling fans for multiple computer systems based on altitude/fluid density measurements from a centralized sensor |
| CN202230428U (en) * | 2011-08-26 | 2012-05-23 | 深圳市宝德计算机系统有限公司 | Speed regulating radiation device for simplex 1-unit (1U) server |
| CN102808796A (en) * | 2012-08-30 | 2012-12-05 | 加弘科技咨询(上海)有限公司 | Method and system for controlling rotating speed of fan |
| CN102996487A (en) * | 2012-12-21 | 2013-03-27 | 浙江宇视科技有限公司 | Device for adjusting rotation speeds of fan |
| US20130230397A1 (en) * | 2012-03-02 | 2013-09-05 | Wistron Corporation | Fan Control Device and Fan Control Method and Cooling System Thereof |
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2014
- 2014-06-04 CN CN201410244275.XA patent/CN103968805B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7538509B1 (en) * | 2008-08-15 | 2009-05-26 | International Business Machines Corporation | Controlling the speed of cooling fans for multiple computer systems based on altitude/fluid density measurements from a centralized sensor |
| CN202230428U (en) * | 2011-08-26 | 2012-05-23 | 深圳市宝德计算机系统有限公司 | Speed regulating radiation device for simplex 1-unit (1U) server |
| US20130230397A1 (en) * | 2012-03-02 | 2013-09-05 | Wistron Corporation | Fan Control Device and Fan Control Method and Cooling System Thereof |
| CN102808796A (en) * | 2012-08-30 | 2012-12-05 | 加弘科技咨询(上海)有限公司 | Method and system for controlling rotating speed of fan |
| CN102996487A (en) * | 2012-12-21 | 2013-03-27 | 浙江宇视科技有限公司 | Device for adjusting rotation speeds of fan |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106909209A (en) * | 2017-02-28 | 2017-06-30 | 郑州云海信息技术有限公司 | A kind of height above sea level modification method and system for server fan regulation and control |
| CN108318096A (en) * | 2018-03-29 | 2018-07-24 | 上海市建筑科学研究院 | A kind of power type back pressure compensation device suitable for air quantity shield |
| CN115289684A (en) * | 2022-06-30 | 2022-11-04 | 芜湖美的智能厨电制造有限公司 | Control method, water heater and computer readable storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103968805B (en) | 2017-02-15 |
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