CN113110962A

CN113110962A - Fan heat dissipation performance test method and test equipment

Info

Publication number: CN113110962A
Application number: CN202110497569.3A
Authority: CN
Inventors: 陈祥; 秦晨; 杨玉华; 吴世甲; 晏显栋; 邹小兵; 黄建新
Original assignee: Zhongke Controllable Information Industry Co Ltd
Current assignee: Zhongke Controllable Information Industry Co Ltd
Priority date: 2021-05-08
Filing date: 2021-05-08
Publication date: 2021-07-13

Abstract

The application provides a fan heat dissipation performance test method and test equipment, and relates to the technical field of server test. According to the method, a control signal is output to a fan to be installed on a server through a test device according to a target heat dissipation strategy to indicate the fan to work according to the target heat dissipation control strategy, and then whether the heat dissipation performance of the fan reaches the standard can be judged according to actual work data fed back by the fan when the fan works, so that the performance of the fan can be tested before the fan is installed on the server, namely independent antecedent test is realized, rework can be timely performed when the fan material has problems, the problem that the heat dissipation performance fails after a failed fan is installed on the server is avoided, or customer loss is caused after the server product is shipped, and at the moment, more manpower and material resources are consumed for rework to influence the project schedule.

Description

Fan heat dissipation performance test method and test equipment

Technical Field

The application relates to the technical field of server testing, in particular to a fan heat dissipation performance testing method and testing equipment.

Background

Heat dissipation is critical to the reliability and performance of electronic products. The number of fans of the server is large, and the prior testing device for detecting and dynamically testing the materials of the fans of the server is lacked. At present, the simple test of accomplishing the fan performance in the use is carried out to shipment yield management and control and collocation server mainboard that mainly rely on the firm, and concrete implementation is the temperature index of setting for the server, adjusts the fan rotational speed according to the consumption situation in real time through the mainboard controller, whether meets standard according to whether satisfying the temperature requirement and judging the heat dispersion of fan. The fan performance can be judged only after the fan is installed in the server, if the heat dissipation performance of the fan is in a problem, rework is needed again, for example, a new fan is installed in the server or the fan is taken back to a manufacturer for rework after being disassembled, so that the period is long, and the project schedule is influenced. There is currently no solution for testing the performance of a fan before it is installed in a server.

Disclosure of Invention

An object of the embodiments of the present application is to provide a method and a device for testing heat dissipation performance of a fan, so as to solve the problem that the performance of the fan cannot be tested due to the lack of an effective testing device before the fan is installed in a server in the prior art.

In a first aspect, an embodiment of the present application provides a method for testing heat dissipation performance of a fan, where the method is applied to a test device, and the method includes: outputting a control signal to a fan to be installed on a server according to a target heat dissipation strategy to indicate the fan to work according to the target heat dissipation strategy; the target heat dissipation strategy is a heat dissipation strategy which is configured by the testing equipment and is adopted by the server under different working conditions; and judging whether the heat dissipation performance of the fan reaches the standard or not according to the actual working data fed back by the fan when the fan works.

In the implementation process, the test equipment outputs a control signal to the fan to be installed on the server according to the target heat dissipation strategy to indicate the fan to work according to the target heat dissipation strategy, and then whether the heat dissipation performance of the fan reaches the standard can be judged according to the actual working data fed back by the fan during working, so that the test equipment can test the heat dissipation performance of the fan before the fan is installed on the server, namely, the fan is independently tested, rework can be timely performed when the fan has problems, the time is shorter, and the problems that the period is long and the project schedule is influenced due to the fact that the fan is tested after being installed on the server can be avoided. And the heat dissipation strategies adopted by the server under different working conditions can be configured for testing, so that the test is more suitable for the running condition of the server, and the heat dissipation of the server under different working conditions of the server can be better realized after the subsequent fan is installed in the server.

Optionally, the target heat dissipation strategy includes: the fan works according to a preset performance index change mode, the performance index change mode refers to a mode that a first performance index of the fan changes along with a second performance index, and the actual working data comprises the second performance index of the fan when the first performance index is a specific value or the first performance index of the fan when the second performance index is a specific value;

whether the heat dissipation performance of the fan reaches the standard is judged according to the actual working data fed back by the fan during working, and the method comprises the following steps:

judging whether the heat dissipation performance of the fan reaches the standard or not according to a second performance index of the fan when the first performance index is a specific value; or judging whether the heat dissipation performance of the fan reaches the standard or not according to the first performance index of the fan when the second performance index is the specific value.

In the implementation process, the heat dissipation performance of the fan is tested by acquiring actual working data of the fan during working according to a preset performance index change mode, so that the test on the heat dissipation performance of the fan under a real heat dissipation scene can be simulated, and the test is more accurate.

Optionally, the first performance index includes a rotation speed of the fan, the second performance index includes an operating duration of the fan, and the performance index varies in such a way that the rotation speed increases to a full speed with the operating duration; the judging whether the heat dissipation performance of the fan reaches the standard according to the first performance index of the fan when the second performance index is the specific value comprises the following steps:

acquiring the actual rotating speed of the fan when the working time of the fan is a preset time;

judging whether the error between the actual rotating speed and the rated rotating speed is within a preset rotating speed error range or not;

and if so, determining that the heat dissipation performance of the fan reaches the standard.

In the implementation process, whether the error between the actual rotating speed and the rated rotating speed of the fan is within the preset error range or not can be effectively evaluated, and whether the fan can achieve good heat dissipation performance under the heat dissipation strategy or not can be effectively evaluated.

Optionally, the determining, by the first performance index, whether the heat dissipation performance of the fan reaches the standard according to a second performance index of the fan when the first performance index is a specific value includes:

acquiring the actual working time of the fan when the actual rotating speed of the fan reaches the full speed;

judging that the actual working time length is less than or equal to a preset time length;

In the implementation process, whether the actual working time when the actual rotating speed of the fan reaches the full speed is less than or equal to the preset time or not is judged, and whether the fan can achieve better heat dissipation performance under the heat dissipation strategy or not can be effectively evaluated.

Optionally, the determining, by the first performance index, whether the heat dissipation performance of the fan reaches the standard according to the first performance index of the fan when the second performance index is a specific value includes:

acquiring the actual rotating speed of the fan when each duty ratio is the corresponding rated duty ratio;

judging whether the error between each actual rotating speed of the fan and the corresponding rated rotating speed is within a preset rotating speed error range or not, wherein each rated duty ratio corresponds to one rated rotating speed;

In the implementation process, the error between each actual rotating speed and the corresponding rated rotating speed is compared, so that the heat dissipation performance of the fan under the heat dissipation strategy can be effectively evaluated by continuously adjusting the rotating speed of the fan under different rated duty ratios.

Optionally, before outputting a control signal to a fan to be installed on the server according to the target heat dissipation policy, the method further includes:

reading device information of the fan when the test device is connected to the fan;

and determining a target heat dissipation strategy adopted during the fan test according to the equipment information.

In the implementation process, the adopted heat dissipation strategy is determined through the equipment information of the fan, so that different heat dissipation strategies can be flexibly set for different fans, and the application scene is wider. When the test is carried out, the corresponding heat dissipation strategy can be found for the fan which is connected currently for testing, so that the pertinence test of the fan can be realized.

In a second aspect, an embodiment of the present application provides a test apparatus, where the test apparatus includes:

the main board is provided with a controller and a peripheral circuit connected with the controller;

the peripheral circuit is used for being connected with a fan to be installed on the server;

the controller is used for outputting a control signal to a fan to be installed on the server according to a target heat dissipation strategy so as to instruct the fan to work according to the target heat dissipation strategy; the target heat dissipation strategy is a heat dissipation strategy which is configured by the testing equipment and is adopted by the server under different working conditions;

the peripheral circuit is used for transmitting actual working data of the fan during working to the controller;

and the controller is also used for judging whether the heat dissipation performance of the fan reaches the standard or not according to the actual working data.

In the implementation process, the controller and the peripheral circuit are arranged on the mainboard, so that the heat dissipation performance of the fan can be tested, the test equipment is simple and easy to carry, the test is more convenient, and the cost is lower.

Optionally, a display is further disposed on the main board;

the display is connected with the controller;

the display is used for receiving the heat dissipation strategy selected by the user, generating a corresponding test instruction and transmitting the test instruction to the controller;

and the controller is used for determining a corresponding target heat dissipation strategy according to the test instruction.

In the implementation process, the heat dissipation strategy is selected through the display, so that the heat dissipation strategy adopted by the fan can be flexibly selected, and better human-computer interaction experience can be provided for testers.

Optionally, a knob is further arranged on the main board;

the knob is connected with the controller;

the knob is used for outputting a corresponding rotation angle to the controller under the triggering of the user;

the controller is used for outputting a corresponding PWM control signal according to the rotation angle, and the PWM control signal is used for controlling the fan to work;

the controller is further used for sending the collected actual working data of the fan working under the control of the PWM control signal to the display for displaying.

In the implementation process, the rotating speed of the fan is manually adjusted through the knob, so that the secondary confirmation test of the heat dissipation performance of the suspected fault fan can be performed, the test accuracy of the test equipment is improved, the test equipment is applicable to more application scenes, and the application range is wider.

Optionally, the peripheral circuit comprises:

the device comprises a sensor, a fan connector, a resistor, a power supply module and a voltage converter;

the sensor is connected with the fan connector and the resistor and is used for collecting current, voltage and power consumption when the fan works;

the fan connector is used for being connected with the fan, the controller and the fan connector and is used for collecting a rotating speed signal of the fan;

the resistor is used for converting the current value of the fan into a voltage value for the sensor to collect;

and the power supply module is connected with the controller and used for supplying power to the controller.

In the implementation process, the data can be transmitted and collected through a simple peripheral circuit, the implementation is easy, and the equipment cost of the test equipment is reduced.

In a third aspect, the present application provides a readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, performs the steps in the method as provided in the first aspect.

Additional features and advantages of the present application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the embodiments of the present application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

Fig. 1 is a flowchart of a method for testing heat dissipation performance of a fan according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of an interface display of a test result according to an embodiment of the present disclosure;

FIG. 3 is a schematic view of an interface display of another test result provided in the embodiments of the present application;

fig. 4 is a schematic structural diagram of a testing apparatus according to an embodiment of the present disclosure;

fig. 5 is a detailed structural schematic diagram of a testing apparatus according to an embodiment of the present disclosure;

FIG. 6 is a schematic view of an initial display interface of a display according to an embodiment of the present disclosure;

FIG. 7 is a schematic illustration of a display interface of a display after testing according to an embodiment of the present disclosure;

fig. 8 is a test flow chart of a yield test and a pressure test according to an embodiment of the present disclosure.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

The embodiment of the application provides a fan heat dissipation performance test method, test equipment outputs a control signal to a fan to be installed on a server according to a target heat dissipation strategy to indicate the fan to work according to the target heat dissipation strategy, and then whether the heat dissipation performance of the fan reaches the standard can be judged according to actual work data fed back by the fan during working, so that the test equipment can test the heat dissipation performance of the fan before the fan is installed on the server, namely, independent test is realized, rework can be performed in time when the fan has problems, the time is shorter, and the problem that the project schedule is influenced due to long period caused by testing after the fan is installed on the server can be solved. And the heat dissipation strategies adopted by the server under different working conditions can be configured for testing, so that the test is more suitable for the running condition of the server, and the heat dissipation of the server under different working conditions of the server can be better realized after the subsequent fan is installed in the server.

Referring to fig. 1, fig. 1 is a flowchart illustrating a method for testing heat dissipation performance of a fan according to an embodiment of the present disclosure, where the method includes the following steps:

step S110: and outputting a control signal to a fan to be installed on the server according to the target heat dissipation strategy so as to instruct the fan to work according to the target heat dissipation strategy.

The fan in the embodiment of the application refers to a fan for radiating heat for a server, and generally includes a CPU fan, a power supply fan, a system fan and the like, for example, a large data center often has thousands of server units, components such as a CPU, a network card, a hard disk and the like in each server unit can be matched with different types of fans, and after the fans are installed on the server, the server can control the fan to operate according to a corresponding heat radiation strategy in an operation process according to a working condition of the server, so that the heat radiation performance of the fan can be tested.

In the application, in order to advance the test stage and shorten the project period, the heat dissipation performance of the fan is tested before the fan is not installed on the server, and the test equipment can indicate the fan to work by configuring the heat dissipation strategies adopted by the server under different working conditions, so that the heat dissipation performance of the fan can be tested according to actual working data of the fan.

If the fan needs to be tested for heat dissipation performance under different heat dissipation strategies, the test equipment can output control signals to the fan according to one heat dissipation strategy each time. The target heat dissipation strategy is one of the heat dissipation strategies, which is a heat dissipation strategy adopted by the server under different working conditions and configured by the test equipment. Here, through the pre-configuration, the test of the fan by the test equipment does not depend on the actual operation condition of the server, but pre-configures which heat dissipation strategy is adopted by the server under which condition, for example, when the temperature of the server is higher, the heat dissipation strategy 1 is adopted, when the temperature of the server is lower, the heat dissipation strategy 2 is adopted, and when the temperature of the server is lower, the heat dissipation strategy 3 is adopted by the server at the initial starting stage, and the like. The test equipment can be internally provided with test data of the fans in the heat dissipation strategies 1, the heat dissipation strategies 2 and the heat dissipation strategies 3, namely the test data corresponding to different heat dissipation strategies is stored, so that the test equipment can output control signals according to the test data to control the fans to operate, and the real working conditions of the fans under different heat dissipation strategies can be simulated.

That is to say, the inside heat dissipation strategy that the server should take under different operating modes that prestores of test equipment, test equipment can be according to these heat dissipation strategy output control signal to can simulate the fan after installing on the server, the actual operating mode that comes the operation based on the heat dissipation strategy that the server adopted, and then the accessible obtains the actual operating data of fan and carries out the test of heat dispersion. In addition, in some modes, the test of the fan by the test equipment is irrelevant to the server, namely the test equipment can independently test, the test equipment and the fan do not need to be installed on the server, and the test equipment does not need to perform data interaction with the server, so that the server does not need to be relied on, and the test cost is reduced.

The test equipment can output corresponding control signals according to different heat dissipation strategies, and the control signals are used for indicating the fan to work according to the corresponding heat dissipation strategies. For example, if the target heat dissipation strategy is heat dissipation strategy 1, the output control signal is to control the rotation speed of the fan to be 5000r/min, and the fan should theoretically operate at the rotation speed, but if some fans have poor performance or have quality problems, the actual operating rotation speed cannot reach the specified rotation speed, so the actual rotation speed data of the fan can be obtained to evaluate the heat dissipation performance of the fan.

In addition, when the test equipment tests the fan, the test equipment can be provided with a connector connected with the fan, and the fan can be connected with the test equipment through the connector, so that the test equipment can output a control signal to the fan through the connector.

Step S120: and judging whether the heat dissipation performance of the fan reaches the standard or not according to the actual working data fed back by the fan when the fan works.

The testing equipment can also be provided with a sensor for collecting relevant data of the fan, and the sensor can be used for collecting actual working data of the fan during working, so that the testing equipment can obtain the actual working data of the fan. In some embodiments, the actual operational data of the fan may include, but is not limited to: speed, power consumption, duty cycle, etc.

For different heat dissipation strategies, the criterion for judging whether the heat dissipation performance of the fan meets the standard is different, for example, under a certain heat dissipation strategy, the evaluation criterion of the heat dissipation performance of the fan is to judge whether the rotating speed of the fan meets the requirement, and under another heat dissipation strategy, the evaluation criterion of the heat dissipation performance of the fan is to judge whether the rotating speed of the fan within a preset time period can reach the set rotating speed. Therefore, the evaluation standard of the heat dissipation performance under different heat dissipation strategies can be set according to actual conditions, and whether the heat dissipation performance of the fan working under different heat dissipation strategies reaches the standard or not can be tested.

In some embodiments, the target heat dissipation strategy comprises: the fan works according to a preset performance index change mode, the performance index change mode refers to a mode that a first performance index of the fan changes along with a second performance index, and the actual working data comprises the second performance index of the fan when the first performance index is a specific value or the first performance index of the fan when the second performance index is a specific value. Therefore, when the heat dissipation performance of the fan is tested, whether the heat dissipation performance of the fan reaches the standard or not can be judged according to the second performance index of the fan when the first performance index is the specific value; or judging whether the heat dissipation performance of the fan reaches the standard or not according to the first performance index of the fan when the second performance index is the specific value.

It is understood that the performance index of the fan may include indexes such as a rotating speed and an operating time, which may be used to evaluate the heat dissipation performance of the fan, and therefore, the first performance index and the second performance index may be data such as a rotating speed and an operating time. Therefore, the performance index change of the fan under a real heat dissipation scene can be simulated, and the heat dissipation performance of the fan can be more accurately tested.

Several ways of testing the heat dissipation performance of the fan are exemplified below.

Mode 1, the first performance index comprises the rotating speed of the fan, the second performance index comprises the working duration of the fan, and the performance index changes in a mode that the rotating speed is increased to full speed along with the working duration. During testing, the actual rotating speed of the fan when the working duration of the fan is the preset duration can be obtained, whether the error between the actual rotating speed and the rated rotating speed is within the preset rotating speed error range or not is judged, and if yes, the heat dissipation performance of the fan is determined to reach the standard.

In this test mode, the fan needs to operate at a high response speed, but the rotation speed fluctuates greatly, so that the fan needs to be adapted to the working condition of rapidly reaching the full speed state under the heat dissipation strategy. The process of increasing the fan speed to full speed with the operating time is understood as the process of the fan reaching the maximum speed from 0.

The preset duration refers to the theoretical duration that the rotating speed of the fan increases to the full speed along with the working duration, and can be flexibly set according to actual requirements, and generally can be set to 10s, that is, the fan is required to be pulled from a static state to the full speed state (namely, the rotating speed is increased from 0 to the full speed) within 10s under the heat dissipation strategy, so that the rotating speed is quickly increased.

Under the condition, when the heat dissipation performance is tested, the actual rotating speed of the fan can be acquired after 10s, that is, the fan runs in a full-speed state after 10s under the theoretical condition, that is, the rotating speed at the moment can be considered as the full speed, or the rotating speed condition after the fan is started can be monitored, and after the fan reaches the maximum rotating speed, the maximum rotating speed can be considered as the full speed, but the actual rotating speed of the fan may not reach the full speed because the performance of the fan may not reach the standard. Therefore, the actual and rated rotation speeds (the rated rotation speed can be regarded as the full speed under the theoretical condition) can be compared, whether the error is within the preset error range or not is judged, and whether the actual rotation speed is within the range of +/-10% of the rated rotation speed or not is judged, if yes, the fan is determined to be good, the heat dissipation performance of the fan reaches the standard, and otherwise, the heat dissipation performance of the fan does not reach the standard.

The rated rotating speed can be flexibly set according to actual conditions, and is generally the rotating speed in a full-speed state set under the target heat dissipation strategy.

Or, the preset time length does not necessarily refer to a time length when the fan theoretically reaches full speed, or may be any time length, each preset time length corresponds to a rated rotation speed that the fan theoretically should reach, if the preset time length is 8s, the theoretical rotation speed that the fan should reach should be 4000r/min, which is the rated rotation speed, but if the actual rotation speed of the fan is 3500r/min when 8s is collected, and if the preset rotation speed error range is set to be 0-800r/min, the error between the actual rotation speed and the rated rotation speed of the fan at this time is within the preset rotation speed range, it is determined that the heat dissipation performance of the fan reaches the standard.

Mode 2, the first performance index comprises the rotating speed of the fan, the second performance index comprises the working duration of the fan, the performance index is changed in a mode that the rotating speed is increased to full speed along with the working duration, during testing, the actual working duration of the fan when the actual rotating speed of the fan reaches the full speed is obtained, whether the actual working duration is smaller than preset duration is judged, and if yes, the heat dissipation performance of the fan is determined to reach the standard.

Wherein, the actual working time of the fan can be obtained by monitoring the rotation speed of the fan by the testing equipment, for example, the testing equipment collects the rotation speed of the fan in real time, if the rotation speed of the fan is stabilized at the maximum rotation speed after a certain time, the rotation speed of the fan can be determined to reach the full speed at the moment, then the time length of the fan running to the maximum rotation speed can be recorded, the time length is taken as the actual working time length when the fan reaches the full speed, if the actual working time length is less than or equal to 10s (the preset time length), if the actual working time length is 8s, the fan is pulled from the static state to the full speed state in 8s, the actual working time length is less than or equal to the preset time length, the heat dissipation performance of the fan is determined to reach the standard, that is, in theory, the fan is required to run from the static state to the full speed in 10s, and in reality, the fan, therefore, the heat dissipation performance of the fan reaches the standard. When the temperature is hot, otherwise, the temperature does not reach the standard, such as the actual working time is 11 s.

In some embodiments, in order to distinguish the good heat dissipation performance of the fan, when the actual operating time is less than or equal to the preset time, it is determined that the fan is good, and the heat dissipation performance is good. The method 1 can also be combined to judge whether the error between the actual rotating speed and the rated rotating speed of the fan in the full-speed state is within a preset error range, if so, the fan is judged to be a good product, namely, if the fan is pulled from the static state in the full-speed state within 10s and the error between the actual rotating speed and the rated rotating speed in the full-speed state is within the preset error range, the fan can be considered to be a good product, and the heat dissipation performance of the fan is excellent, so that the good product fan and the good product fan can be distinguished, and when the fan is subsequently installed on a server, the corresponding fan can be selected for installation. Certainly, when the test conditions of the mode 1 and/or the mode 2 are not met, the heat dissipation performance of the fan is determined to be not up to standard, the fan is inferior, the inferior fan can be returned to a manufacturer for reworking, and the inferior fan is not used for products mounted on the server subsequently, so that some fans which are not up to standard can be stopped from the source, and the problem that the subsequent fans cannot be used when mounted on the server is solved.

And in the mode 3, the first performance index comprises the rotating speed of the fan, the second performance index comprises the duty ratio, the performance index change mode is that the rotating speed is increased along with the increase of the duty ratio, when the test is carried out, the actual rotating speed of the fan is obtained when each duty ratio is the corresponding rated duty ratio, whether the error between each actual rotating speed of the fan and the corresponding rated rotating speed is within the preset rotating speed error range or not is judged, each rated duty ratio corresponds to one rated rotating speed, and if the error is within the preset rotating speed error range, the heat radiation performance of the fan is determined to reach the standard.

Under the heat dissipation strategy, the rotating speed of the fan is required to be stable, noise is not easy to generate, and the fan is controlled finely. The test equipment can continuously output control signals corresponding to different rated duty ratios so as to continuously adjust the rotating speed of the fan, namely the rotating speed of the fan is changed along with the control signals output by the test equipment, so that the heat dissipation performance of the fan can be evaluated through the change of the rotating speed of the fan.

The rated rotating speed corresponding to each rated duty ratio can be obtained from test data marked on the fan when a manufacturer leaves a factory, the test data of the manufacturer on the fan can be stored in the fan or can be marked on the fan, test equipment can read the test data by connecting the fan, or a tester inputs the test data in the test equipment, and the test data comprises the rated rotating speed of the fan under each rated duty ratio. When it is determined that the target heat dissipation strategy in the method 3 is adopted to control the operation of the fan, the test equipment may first acquire test data and then generate a curve of the rated rotation speed and the rated duty ratio. During testing, the test equipment can output corresponding control signals according to each rated duty ratio, the control signals are PWM control signals, if the control signals comprise 6 rated duty ratios, the test equipment can sequentially output the corresponding 6 control signals according to the specified time on the curve, if the time is 0, the control signal corresponding to the first rated duty ratio is output, the control signal corresponding to the second rated duty ratio is output at the 1 st time after a certain time interval until the control signal corresponding to the last rated duty ratio is output, and then the heat radiation performance of the fan is evaluated.

When the heat dissipation performance of the fan is evaluated, the test equipment can acquire the rotating speed of the fan under the control of each control signal, namely the actual rotating speed, compare the actual rotating speed of the fan under the control of each control signal with the corresponding rated rotating speed, if the test equipment outputs the corresponding control signal under the rated duty ratio 1 to control the fan to operate, then acquire the actual rotating speed of the fan at the moment, compare the actual rotating speed of the fan with the rated rotating speed corresponding to the rated duty ratio 1, so that the actual rotating speed of the fan under each rated duty ratio can be acquired, then the actual rotating speed is compared with the corresponding rated rotating speed to obtain a plurality of comparison errors, and if each comparison error is within the preset rotating speed error range, the heat dissipation performance of the fan is determined to reach the standard.

The comparison error refers to an absolute value of a difference value between each actual rotating speed and the corresponding rated rotating speed, the preset rotating speed error range can be flexibly set according to actual requirements, if the preset rotating speed error range is set to be 0-50r/min, if the comparison error is in the preset rotating speed error range, the heat dissipation performance of the fan is determined to reach the standard, otherwise, the heat dissipation performance of the fan does not reach the standard. For example, the rated rotation speed of the fan is 3000r/min under a certain rated duty ratio, and the actual rotation speed is 2900r/min, the comparison error of the two rotation speeds is 100r/min, and is not in the preset rotation speed error range, each comparison error is sequentially compared according to the mode, if all the comparison errors are in the preset rotation speed error range, the heat dissipation performance of the fan is determined to be up to the standard, otherwise, if any one comparison error is not in the preset rotation speed error range, the heat dissipation performance of the fan is determined to be not up to the standard. Or, if the comparison errors with the preset number are within the preset rotation speed error range, the heat dissipation performance of the fan is determined to reach the standard, and if 7 comparison errors exist, and if 5 comparison errors (the preset number is set to 4) are within the preset rotation speed error range, the heat dissipation performance is determined to reach the standard.

In addition, in order to facilitate a more intuitive comparison, the testing device may further generate a rotation speed-duty ratio curve of the actual rotation speed of the fan when the fan operates under the control of each control signal and the corresponding rated duty ratio, and then compare the curve with a pre-obtained curve (a curve generated by the rated duty ratio and the rated rotation speed), as shown in fig. 2, wherein a light gray curve is a curve generated by the rated duty ratio and the rated rotation speed, and a dark gray curve is a curve formed by the actual rotation speed of the fan when the fan operates actually and the rated duty ratio, at this time, a comparison error between two rotation speeds corresponding to the same rated duty ratio may be compared.

In order to facilitate the testing personnel to observe the comparison condition more intuitively, the picture shown in fig. 2 may be displayed in the testing equipment, that is, the testing equipment may include a display, which may be used to display the picture shown in fig. 2, and may determine the fan as a good product, or a defective product according to different comparison errors, for example, if the comparison error is greater than or equal to 10%, the fan is determined as a defective product, if all the comparison errors are less than 10%, the fan is determined as a good product, and if all the comparison errors are less than 10% and some of the comparison errors are less than 5%, the fan is determined as a good product. Alternatively, the maximum error and the minimum error may be determined from the plurality of comparison errors, and if the maximum error is less than 10% and greater than 5%, the fan is determined as good, and if the maximum error is less than 5%, the fan is determined as good. It is understood that the evaluation criterion of the goodness of the fan may be set according to actual conditions.

In some embodiments, the test device may further set a corresponding test time, for example, the target heat dissipation strategy is operated for 100 times within 1s, so that more data can be obtained, and thus whether the comparison error between the rotation speeds changes along with the operation times can be detected, and further, the heat dissipation performance of the fan can be evaluated by using more data.

In some embodiments, after the test is completed, the test equipment may further generate and output a corresponding test report, and the test report may be displayed on a display in the test equipment, as shown in fig. 3, the obtained actual operating data of the fan may further be displayed by generating a corresponding curve such as an actual rotational speed, power consumption, and the like, and an evaluation result of the fan may also be displayed, such as a good product, or a defective product, and if the heat dissipation performance of the fan does not reach the standard last time, a display lamp corresponding to the display product is turned on, so that a tester may more intuitively observe a test result of the current fan.

A Save trigger button "Save" may also be provided in the display interface shown in fig. 3, and a user may click the Save trigger button to Save a test result, for example, Save a curve picture in the figure, so that the test result may be called or viewed subsequently.

In addition, it can be understood that, the above only lists several heat dissipation strategies, in practical applications, more heat dissipation strategies may be flexibly set, and then the heat dissipation performance of the fan under different heat dissipation strategies may be tested according to requirements, which is not exemplified herein.

In some embodiments, different types of fans may use different heat dissipation strategies in actual operation, for example, a CPU fan generally performs heat dissipation according to the heat dissipation strategy 1, and a hard disk fan generally performs heat dissipation according to the heat dissipation strategy 2. Therefore, different heat dissipation strategies can be adopted for testing different types of fans, and the purpose of flexibly testing different fans is achieved. In this scenario, when the test device acquires the target heat dissipation strategy, the test device may acquire the target heat dissipation strategy according to the device information of the fan, and the specific implementation process is as follows: when the testing equipment is connected to the fan, the equipment information of the fan is read, and then a target heat dissipation strategy adopted in the fan testing process is determined according to the equipment information of the fan.

The device information of the fan may refer to information such as a type, a manufacturer, a maximum rotation speed, or a type of the fan, and the type of the fan may be distinguished according to the device information of the fan, such as a CPU fan or a system fan, and if the heat dissipation strategies adopted for different types of fans are different, the corresponding heat dissipation strategy may be determined according to the type of the fan. The test equipment can store different heat dissipation strategies corresponding to the equipment information, so that the test equipment can search and obtain a target heat dissipation strategy adopted for testing the fan according to the equipment information of the currently connected fan. Certainly, if some fans need to be tested by adopting a plurality of heat dissipation strategies, the number of target heat dissipation strategies may be multiple, and when the fans are tested by adopting a plurality of heat dissipation strategies, in order to facilitate knowing the heat dissipation performance of the fans under each heat dissipation strategy, the fans can be sequentially tested, that is, the fans are controlled to work according to one heat dissipation strategy each time, and then the heat dissipation performance of the fans is tested.

The equipment information of the fan can be pre-stored in the fan by a manufacturer, so that the test equipment can directly read the equipment information of the fan from the memory of the fan, and the efficiency is higher.

In the implementation process, the adopted heat dissipation strategy is determined through the equipment information of the fan, so that different heat dissipation strategies can be flexibly set for different fans, and the application scene is wider. When testing, can be to the fan of current connection, find corresponding heat dissipation strategy and test, thereby can realize the pertinence test to the fan, can avoid adopting irrelevant heat dissipation strategy to test and lead to the longer problem of test time to the fan, and, probably this fan can not adopt certain heat dissipation strategy operation in practical application, and when adopting this heat dissipation strategy test to pass through in the test procedure, also need do over again with this fan, also can lead to the material extravagant like this, prolong the problem of project cycle, adopt relevant heat dissipation strategy to carry out the pertinence test to the fan then can avoid this problem in this application.

In some embodiments, in order to reduce resource occupation of the test equipment, the corresponding relationship between the equipment information of the fan and the heat dissipation policy may be stored on the network platform, so that the test equipment may read the equipment information of the fan when being connected to the fan, and then may obtain the target heat dissipation policy used in the fan test from the network platform according to the equipment information.

The corresponding relation can be that the server is pre-stored on the network platform, if the server can determine the heat dissipation strategy adopted by the server according to the working condition in the running process of the server, then the corresponding relation between the equipment information of the fan to be installed on the server and the heat dissipation strategy is stored on the network platform, according to the mode, a large number of heat dissipation strategies corresponding to the equipment information of different fans can be stored on the network platform, so that the test equipment can be in communication connection with the network platform, and then the corresponding target heat dissipation strategy is directly obtained from the network platform, therefore, the test equipment can store corresponding information without occupying a large amount of storage space, the test equipment can be realized by adopting equipment with small memory and low cost, and the test cost can be saved.

In some embodiments, in order to better simulate the real working condition of the fan mounted on the server, the fan may be placed in a test box, and the test box may simulate the real working condition of the server, for example, a heater may be disposed in the test box to simulate the temperature of the server under different operating conditions, and the test equipment may collect the temperature of the heater, and then select a corresponding heat dissipation strategy according to the temperature to instruct the fan to operate, so as to test the heat dissipation performance of the fan in practical application.

Referring to fig. 4, fig. 4 is a schematic structural diagram of a testing apparatus 100 according to an embodiment of the present disclosure; the testing apparatus 100 is used for executing the above-mentioned fan heat dissipation performance testing method, and the testing apparatus 100 includes a main board 110, a controller 120 disposed on the main board 110, and a peripheral circuit 130 connected to the controller 120.

The controller 120 may be a programmable logic device, such as a CPLD or an FPGA, and because the programmable logic device is flexibly expanded and can carry a more accurate test algorithm, the purpose of improving the test accuracy and efficiency can be achieved more easily by optimizing the test algorithm.

Mainboard 110 can be the PCB board, and mainboard 110's size can design for a little, can conveniently carry like this, is fit for field test and project earlier stage and uses, and whole test equipment 100's cost is also lower, can batch production be used for the test, if there are 100 fans to await measuring at present, then can adopt 100 test equipment 100 to test respectively, so can realize the parallel test in batches of fan, efficiency of software testing is higher.

The peripheral circuit 130 is used to connect with a fan to be mounted on the server. And the controller 120 may be configured to output a control signal to the fan to be installed on the server according to the target heat dissipation policy, so as to instruct the fan to operate according to the target heat dissipation policy. The peripheral circuit 130 is configured to transmit actual working data of the fan during working to the controller 120, and the controller 120 may determine whether the heat dissipation performance of the fan meets the standard according to the actual working data.

It will be understood that, for convenience and brevity of description, the specific procedures for testing by the test apparatus 100 may be referred to the description of the method embodiments above, and will not be repeated herein.

In the implementation process, the controller 120 and the peripheral circuit 130 are arranged on the main board 110 to test the heat dissipation performance of the fan, so that the test equipment 100 is simple and easy to carry, and is more convenient to test and lower in cost.

In order to facilitate the tester to more intuitively understand the test result, a display 140 may be further disposed on the motherboard 110, as shown in fig. 5, the display 140 is connected to the controller 120, the display 140 is configured to receive the heat dissipation policy selected by the user, generate a corresponding test instruction, and transmit the corresponding test instruction to the controller 120, and the controller 120 may be configured to determine the corresponding target heat dissipation policy according to the test instruction.

That is to say, the display 140 may provide a user interaction interface, and a tester may select a heat dissipation policy currently used for testing the fan on the display 140, and if the heat dissipation policy 1 is selected, the display 140 may generate a corresponding test instruction and output the test instruction to the controller 120, and the controller 120 may determine that the target heat dissipation policy is the heat dissipation policy 1 according to the test instruction, so that the heat dissipation policy used for testing may be flexibly selected according to the test requirement.

In addition, the display 140 may be provided with a test switch button, and a user may control the test apparatus 100 to start or end a test by triggering the test switch button, before the test, the switch button is in an off state, and the power indicator on the display 140 is in a default red state, which indicates that the controller 120 is not powered currently. The display 140 may also be used to display the operating data of the fan, and before the test, the rotation speed, power consumption, duty ratio data, etc. of the fan are all empty, which indicates that no output and sampling data exist, as shown in fig. 6.

When the tester activates the switch button so that the switch button is in an on state, the test apparatus 100 is powered on. The voltages applied to the various devices in the test apparatus 100 may be different, for example, the peripheral circuit 130, the controller 120 and the display 140 use 12V, 5V and 3V voltages, respectively, when the three power indicator lights on the display 140 change from red to green to indicate that power is applied. The test equipment 100 then initiates the test according to the method described above, wherein the PWM indicator light on the display 140 changes from red to green, indicating that there is a PWM signal output, and the controller 120 may display the collected power consumption, speed, and duty cycle data of the fan on the display 140, as shown in fig. 7.

Additionally, an adjustment of the PWM signal may also be provided on the display 140, such as "+, -" in FIG. 7, indicating that the frequency of the PWM control signal may be increased or decreased to effect an adjustment of the speed of the fan.

The display 140 can be realized by a liquid crystal display, the model of the display can be TJC4832T 135_011, the display is provided with matched development UI development software USARTHMI, pictures, texts and waveform curves can be conveniently embedded for display, and the interface is concise and visual. The display 140 can realize the visualization of the test result, and compared with the traditional nixie tube, the result display is more visual and the human-computer interaction effect is better.

In the implementation process, the heat dissipation strategy is selected through the display 140, so that the heat dissipation strategy adopted by the fan can be flexibly selected, and better human-computer interaction experience can be provided for testers.

In some embodiments, for some particular types of fans, the output of the control signal may also be adjusted manually if the test equipment 100 does not have test data previously stored therein about which to test the fan. For example, the main board 110 may further be provided with a knob 150 (refer to fig. 5), the knob 150 is connected to the controller 120, the knob 150 is configured to output a corresponding rotation angle to the controller 120 under the trigger of a user, the controller 120 is configured to output a corresponding PWM control signal according to the rotation angle, the PWM control signal is configured to control the fan to operate, and then the controller 120 may collect actual operating data of the fan operating under the control of the PWM control signal and send the data to the display 140 for displaying.

That is, when a small number of special types of fans are tested, the test can be implemented by manually adjusting the duty ratio by a user, for example, the user can rotate the knob 150 on the main board 110, the controller 120 analyzes the corresponding duty ratio adjustment data according to the rotation angle for rotating the knob 150, and then outputs the corresponding PWM control signal to adjust the rotation speed of the fan, and then the collected actual working data of the fan can be displayed through the display 140.

Alternatively, the rotational speed of the fan may be manually adjusted by the knob 150 to perform a secondary confirmation test on the heat dissipation performance of some suspected faulty fans, for example, the secondary test is performed by the knob 150 on some fans that do not meet the heat dissipation performance obtained by the test using the above test method, so that the accuracy of the test may be improved.

Wherein knob 150 may be implemented as a rotary encoder model EC11 for user adjustment of the duty cycle.

Or, when factory data of some fans is verified, the factory data may also be adjusted by the knob 150, the test may be referred to as a good product test, the test according to the heat dissipation strategy may be referred to as a pressure test, and in a good product test stage, the test equipment 100 may display the collected actual working data of the fans, such as power consumption, duty ratio, rotation speed and other data, on the display 140, so that a tester may compare the output data with the factory data of the fans to verify whether the fans are damaged after being factory to affect their work. The test flow chart of the two tests can be as shown in fig. 8 in connection with the process of testing the pressure in the above embodiment.

In the implementation process, the rotating speed of the fan is manually adjusted through the knob 150, so that the heat dissipation performance of a small number of special fans can be tested, the testing equipment 100 can be applied to more application scenes, and the application range is wider.

In some embodiments, please refer to fig. 5, in order to implement the heat dissipation performance test, a code detection module 121, a PWM module 122, a rotation speed detection module 123, a power consumption acquisition module 124, a pressure test module 125, a data processing module 126, a serial port receiving module 127, and a serial port sending module 128 may be integrated inside the controller 120, the code detection module 121 is connected to the knob 150, and may analyze to obtain a rotation angle, and then output the rotation angle to the PWM module 122, and the PWM module 122 outputs a PWM control signal.

The PWM module 122 is connected to the peripheral circuit 130, the data processing module 126, and the pressure testing module 125, the pressure testing module 125 is connected to the serial port receiving module 127, the serial port receiving module 127 is connected to the display 140, the serial port receiving module 127 can receive a test instruction corresponding to a heat dissipation strategy selected by a user through the display 140, and then send the test instruction to the pressure testing module 125, the pressure testing module 125 analyzes the test instruction to obtain a corresponding heat dissipation strategy, and then can obtain corresponding test data to send to the PWM module 122, so that the PWM can output a corresponding control signal to control the fan.

The rotation speed detection module 123 and the power consumption acquisition module 124 may send the acquired rotation speed and power consumption of the fan to the data processing module 126, and the data processing module 126 may perform corresponding processing such as analog-to-digital conversion and binary conversion on the data and then send the data to the display 140 through the serial port sending module 128 for display.

It is understood that the modules in the controller 120 can be implemented by software programs, that is, the modules are program segments or codes in the controller 120, and the corresponding functions of the modules can be implemented by the controller 120 executing the program segments or codes.

In fig. 5, the peripheral circuit 130 includes a sensor 131, a FAN connector 132(FAN), a resistor 134, a power supply module 135, and a voltage converter 136. The sensor 131 is connected with the fan connector 132 and the resistor 134, and collects current, voltage and power consumption when the fan operates; the fan connector 132 is used for connecting with the fan and the controller 120, and is used for collecting a rotating speed signal of the fan; the resistor 134 is used for converting the current value of the fan into a voltage value for the sensor 131 to collect; the power module 135 is coupled to the controller 120 for providing power to the controller 120 and the display 140.

The programmable logic device can be LCMX02-4000HC of lattice, is packaged by TQFP144, and has the size of 22 × 1.6mm, has flexible hardware cuttable characteristics, and can be conveniently designed and coded by a Verilog language to detect the module 121, the PWM module 122, the rotating speed detection module 123, the power consumption detection module, the pressure test module 125, the serial port receiving module 127, the data processing module 126 and the serial port sending module 128. In addition, other auxiliary functions can be developed under the system framework when the logic capacity allows, and the development period is extremely short, which is the greatest advantage of the programmable logic device compared with other controllers 120.

In some embodiments, the fan connector 132 may be used to connect fans of commonly used fan specifications, such as a 4Pin, 8Pin fan interface, and a high power KF7.62 terminal for supporting multiple fan tests.

In order to facilitate the synchronous testing of the plurality of fans, the fan connectors 132 may be provided in a plurality, that is, the plurality of fan connectors 132 are provided in the testing device 100, so that the plurality of fans may be connected simultaneously, then the testing device 100 may test each fan respectively, and the test result of each fan may be displayed in the display 140 respectively, for example, a display interface is provided for the test result of each fan, so that the parallel testing of the plurality of fans may be implemented simultaneously, and the testing efficiency is improved.

In some embodiments, the resistor 134 may be a precision resistor 134 of 0.00075R, 1%, 3W, for converting the current value of the current fan into a voltage value for the sensor 131 to collect and calculate.

IN some embodiments, the sensor 131 may be IN219, and the sensor 131 has an SMbus interface, and is connected to the controller 120 to directly read the current, voltage, and power consumption parameters.

In some embodiments, the power module 135 (i.e., the CRPS power module 135 in fig. 5) may be a power supply of 1600W for providing system power to the test equipment 100, and the power module 135 is connected to the test equipment 100 via a connector and may be selected according to the specific test power consumption.

In some embodiments, the voltage converter 136 is a DC-DC converter, two in number, connected to the controller 120 and the display 140 respectively, and may be of the type TPS53312RGT, which may provide 3.3V and 5V power to the controller 120 and the display 140.

In the implementation process, the transmission and the acquisition of data can be realized through the simple peripheral circuit 130, the implementation is easy, and the equipment cost of the test equipment 100 is reduced.

It will be appreciated that the configuration shown in FIG. 5 is merely illustrative and that in actual practice, test apparatus 100 may also include more or fewer components than shown in FIG. 5, or have a different configuration than shown in FIG. 5.

Embodiments of the present application provide a readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, performs the method processes performed by the test equipment in the method embodiment shown in fig. 1.

The present embodiments disclose a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the methods provided by the above-described method embodiments, for example, comprising: outputting a control signal to a fan to be installed on a server according to a target heat dissipation strategy to indicate the fan to work according to the target heat dissipation strategy; the target heat dissipation strategy is a heat dissipation strategy which is configured by the testing equipment and is adopted by the server under different working conditions; and judging whether the heat dissipation performance of the fan reaches the standard or not according to the actual working data fed back by the fan when the fan works.

To sum up, the embodiment of the present application provides a method and a device for testing heat dissipation performance of a fan, in which a control signal is output to the fan to be installed on a server through the testing device according to a target heat dissipation strategy to instruct the fan to operate according to the target heat dissipation strategy, and then whether the heat dissipation performance of the fan reaches the standard or not can be judged according to actual operating data fed back by the fan during operation. And the heat dissipation strategies adopted by the server under different working conditions can be configured for testing, so that the test is more suitable for the running condition of the server, and the heat dissipation of the server under different working conditions of the server can be better realized after the subsequent fan is installed in the server.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.

In addition, units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

Furthermore, the functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for testing heat dispersion performance of a fan is applied to test equipment and comprises the following steps:

outputting a control signal to a fan to be installed on a server according to a target heat dissipation strategy to indicate the fan to work according to the target heat dissipation strategy; the target heat dissipation strategy is a heat dissipation strategy which is configured by the testing equipment and is adopted by the server under different working conditions;

and judging whether the heat dissipation performance of the fan reaches the standard or not according to the actual working data fed back by the fan when the fan works.

2. The method of claim 1, wherein the target heat dissipation strategy comprises: the fan works according to a preset performance index change mode, the performance index change mode refers to a mode that a first performance index of the fan changes along with a second performance index, and the actual working data comprises the second performance index of the fan when the first performance index is a specific value or the first performance index of the fan when the second performance index is a specific value;

3. The method of claim 2, wherein the first performance level comprises a speed of the fan, the second performance level comprises a length of time of operation of the fan, and the performance level varies by increasing the speed to full speed with the length of time of operation; the judging whether the heat dissipation performance of the fan reaches the standard according to the first performance index of the fan when the second performance index is the specific value comprises the following steps:

4. The method of claim 2, wherein the first performance indicator comprises a rotational speed of the fan, the second performance indicator comprises an operating duration of the fan, the performance indicator varies as the rotational speed increases with the operating duration to a full speed, and the determining whether the heat dissipation performance of the fan meets the criteria based on the second performance indicator of the fan when the first performance indicator is a specific value comprises:

5. The method of claim 2, wherein the first performance indicator comprises a rotational speed of the fan, the second performance indicator comprises a duty cycle, the performance indicator varies such that the rotational speed increases with increasing duty cycle, and the determining whether the heat dissipation performance of the fan meets the predetermined heat dissipation performance according to the first performance indicator when the second performance indicator is a specific value comprises:

6. The method of claim 1, wherein before outputting the control signal to the fan to be installed on the server according to the target heat dissipation strategy, the method further comprises:

7. A test apparatus, characterized in that the test apparatus comprises:

8. The test equipment of claim 7, wherein a display is further disposed on the motherboard;

the display is connected with the controller;

9. The test equipment as claimed in claim 8, wherein the main board is further provided with a knob;

the knob is connected with the controller;

10. The apparatus of any of claims 7-9, wherein the peripheral circuitry comprises: