TWI391641B - System and method for testing thermal resistivity of coolers - Google Patents

Description

Radiator thermal resistance coefficient test system and method

The invention relates to a heat sink thermal resistance coefficient tester and a test system and method, in particular to a central processing unit (CPU) heat sink thermal resistance coefficient tester and a test system and method.

The busiest computer in the computer is the CPU, and its heat is second to none. From the 8086 to the Pentium series, the speed is getting faster and faster, and the CPU "fever" is getting higher and higher. Excessive temperature can cause "electron migration" inside the CPU chip, causing chronic damage to the CPU, shortening the life of the CPU, and causing system instability.

Generally, the internal temperature of the CPU should be less than 80 °C, and the external temperature should be less than 50 °C. Therefore, we must take measures to solve the heat dissipation problem of components such as CPU. In particular, the temperature of the CPU is directly related to the stability of the entire computer.

The heat dissipation of the CPU is generally solved by the heat sink. The working principle is to install the heat sink on the surface of the CPU. When the CPU source generates heat, the heat will be taken away from the CPU and transferred to the heat sink. After the heat sink, the fan of the heat sink will rotate. The resulting airflow takes away the heat, so the loop is endless, which is the whole process of heat dissipation.

It can be seen from the above that the heat conduction performance of the heat sink directly affects the heat dissipation to the CPU. Generally, the heat conduction performance of the heat sink is measured by the thermal resistance coefficient. The smaller the thermal resistance coefficient of the heat sink, the better the heat dissipation performance of the heat sink. Conversely, the higher the thermal resistance coefficient, the worse the heat dissipation of the heat sink. Therefore, the thermal resistance coefficient of the heat sink is an important indicator for judging the performance of the heat sink.

In view of the above, it is necessary to propose a heat sink thermal resistance coefficient tester and a test system and method, which can measure the thermal resistance coefficient of the CPU heat sink.

A heat sink thermal resistance coefficient tester includes: a heater for conducting heat to a heat sink to be tested; a first temperature sensor and a second temperature sensor, respectively Testing a temperature of a center position of the heat sink and a temperature of an edge position; and a transmission device for driving the first temperature sensor and the second temperature sensor to cause the first temperature sensor And the second temperature sensor respectively contacts the center position and the edge position of the heat sink at the time of testing, and when the test is finished, the first temperature sensor and the second temperature sensor are sensed The device leaves the heat sink.

A heat sink thermal resistance coefficient test system includes a computer and a heat sink thermal resistance coefficient tester. The computer includes a host and a display. The heat sink thermal resistance coefficient tester is connected to the heat sink to be tested and connected to the serial port of the host through a cable. The heat sink thermal resistance coefficient tester includes a heater, a first temperature sensor, a second temperature sensor, and a transmission. The host includes a heat sink thermal resistance coefficient test program, and the program includes: a system initialization module, configured to receive an initial setting of the user, the initial setting includes setting a test time for the heat sink, and the heat sink is in a qualified state. The highest temperature value of the lower central position and the highest temperature value of the edge position, and the maximum value of the thermal resistance coefficient; the test module is configured to control the heater to start after the heat sink coefficient tester is started Heating the radiator and controlling the transmission to drive the first Rotating a temperature sensor and a second temperature sensor to cause the first temperature sensor and the second temperature sensor to respectively contact a center position and an edge position of the heat sink to start measuring the heat sink The temperature of the center position and the edge position, and the thermal resistance coefficient of the heat sink; and a judging module for judging whether the test time of the heat sink reaches the preset test time, and respectively transmitting the measurement The temperature of the center position of the heat sink and the temperature of the edge position, and the measured thermal resistance coefficient of the heat sink are compared with the highest temperature value of the central position of the set heat sink in the qualified state and the highest temperature value of the edge position. And the maximum value of the set thermal resistance coefficient determines whether the heat sink passes the test.

A method for testing the thermal resistance coefficient of a radiator, using the above-mentioned radiator thermal resistance coefficient test system to test the thermal resistance coefficient of the radiator. The method includes the following steps: initializing a setting of the system, the initial setting includes setting a test time for the heat sink, a highest temperature value of the central position of the heat sink in the qualified state, and a highest temperature value of the edge position, and a maximum value of the thermal resistance coefficient; starting the heat sink coefficient tester; measuring the temperature of the center position and the edge position of the heat sink during the set test time, and measuring the thermal resistance coefficient of the heat sink; After the time is over, it is determined whether the temperature value of the center position of the measured heat sink and the temperature value of the edge position are respectively higher than the highest temperature value and the highest temperature value of the edge position of the set heat sink in the center position of the qualified state. If the temperature value of the center position of the measured heat sink and the temperature value of the edge position are not higher than the highest temperature value and the highest temperature value of the edge position of the set heat sink at the center position in the qualified state, respectively, Continue to determine whether the measured thermal resistance coefficient of the heat sink is greater than a maximum value of the set thermal resistance coefficient; and if the measured thermal resistance coefficient of the heat sink is not greater than a maximum value of the set thermal resistance coefficient, the heat sink passes the test.

Compared with the prior art, the heat sink thermal resistance coefficient tester and the test system and method provided by the invention can measure the thermal resistance coefficient of the CPU heat sink, collect test data, and can form a report and test data. Analyze to make production more rational.

Referring to Figure 1, there is shown a system architecture diagram of a preferred embodiment of the heat sink coefficient test system of the present invention. The system mainly comprises a computer 1 and a heat sink thermal resistance coefficient tester 2 for testing the thermal resistance coefficient of at least one heat sink 3 to be tested. The computer 1 mainly includes a host 10 and a display 11. The computer 1 also includes elements such as a keyboard, a mouse, etc., but these elements are not shown in Fig. 1 in order to make the description of the preferred embodiment more compact. The host 10 includes a heat sink thermal resistance coefficient test program 20, which is mainly used to test the heat sink through the heat sink thermal resistance coefficient tester 2 to determine whether the heat sink is qualified. In order to realize the basic functions of the computer 1, the host 10 should also include other necessary hardware or software such as a CPU, a memory, and the like, which will not be described herein. The display 11 provides a user interface for displaying the test status in real time, and through the user interface, the user can access the heat sink thermal resistance coefficient test program 20 and other software in the host 10.

The heat sink thermal resistance coefficient tester 2 can test two heat sinks 3 at the same time, and includes a heater 21, which functions as a heat generating CPU for conducting heat to the heat sink 3 to be tested; The sensor 22 and the second temperature sensor 23 are respectively used for testing the temperature T ₁ of the center position of the heat sink 3 and the temperature T _{2 of the} edge position; and the transmission device 24 for moving the first temperature sensor 22 and The position of the second temperature sensor 23 causes the first temperature sensor 22 and the second temperature sensor 23 to respectively contact the center position and the edge position of the heat sink 3 at the time of testing, and at the end of the test, The first temperature sensor 22 and the second temperature sensor 23 are separated from the heat sink 3; the middle shaft fixing rod 25 is used for fixing the transmission device 24; the test base 26 is used for carrying the radiator 3, the heater 21 and the like. The start button 27 is used to control the start of the heat sink thermal resistance coefficient tester 2; the test status display screen 28 is for displaying the state of the heat sink thermal resistance coefficient tester 2, that is, the start state or the stop state.

Referring to FIG. 2, it is a functional module diagram of the heat sink thermal resistance coefficient test program 20 of the host computer 10. Each of the modules referred to in the present invention is a summary of the functionality of each block in the heat sink coefficient test program 20, which may be more suitable for describing the execution of the program in the computer than the program segment. The description of the program by the invention is described in modules.

The heat sink thermal resistance coefficient test program 20 mainly includes: a system initialization module 100, a test module 110, a test status display module 120, a determination module 130, an alarm module 140, and a result storage module 150.

The system initialization module 100 is configured to receive an initialization setting of a test user. The initial setting includes setting the test time for the heat sink 3, the highest temperature value T _1max of the center position of the heat sink 3 in the qualified state, the highest temperature value T _{2max of the} edge position, and the maximum value θ _{max of the} thermal resistance coefficient. Wait.

The test module 110 is configured to be used when the heat sink thermal resistance coefficient tester 2 After the movement, the heater 21 is controlled to heat the radiator 3, and the control transmission device 24 drives the first temperature sensor 22 and the second temperature sensor 23 to rotate, so that the first temperature sensor 22 and the second temperature sensor are sensed. After contacting the center position and the edge position of the heat sink 3, respectively, the device 23 starts measuring the temperature of the center position and the edge position of the heat sink 3, and the thermal resistance coefficient of the heat sink.

The test status display module 120 is configured to display the test status and test result of the heat sink 3 through the display 11 in real time.

The determining module 130 is configured to determine whether the installation of the test system by the user is successful; determine whether the test time of the heat sink 3 has reached the initial set test time; and after the test time is reached, determine the first temperature sensor 22 Whether the temperature T ₁ of the center position of the heat sink 3 and the temperature T _{2 of the} edge position measured by the second temperature sensor 23 are too high, that is, whether the center position of the heat sink 3 in the qualified state is higher than the above-described initial setting, respectively. The highest temperature value T _1max and the highest temperature value T _{2max of the} edge position; and whether the measured thermal resistance coefficient θ of the heat sink 3 is higher than the maximum value θ _{max of} the set thermal resistance coefficient and the like.

The alarm module 140 is configured to issue an alarm to prompt the test user when the heat sink 3 fails the test.

The result storage module 150 is configured to store the test result of the heat sink 3 in the memory of the host 10.

Referring to FIG. 3, it is a flowchart of an implementation of a preferred embodiment of the method for testing the thermal resistance coefficient of the heat sink of the present invention.

In step S10, the user installs the test system. The system installation includes installing the heat sink thermal resistance coefficient test program 20 into the host computer 10 of the computer 1. The heat sink thermal resistance coefficient tester 2 is connected to the serial port of the main body 10 of the computer 1 through a cable.

In step S11, the determining module 130 determines whether the installation of the system is successful, that is, whether the heat sink coefficient test program 20 has been successfully installed into the host 10 of the computer 1, and whether the heat sink coefficient test has been tested. The instrument 2 is successfully connected to the serial port of the host 10.

If the system is successfully installed, in step S12, the user initializes the system through the system initialization module 100. The initial setting includes setting the test time for the heat sink 3, the highest temperature value T _1max of the center position of the heat sink 3 in the qualified state, the highest temperature value T _{2max of the} edge position, and the maximum value θ _{max of the} thermal resistance coefficient. Wait.

In step S13, the user places the heat sink 3 to be tested onto the heat sink thermal resistance coefficient tester 2, and starts the heat sink thermal resistance coefficient tester 2.

In step S14, the test module 110 starts to control the heater 21 to heat the heat sink 3, and the control transmission device 24 drives the first temperature sensor 22 and the second temperature sensor 23 to rotate, so that the first temperature sensor 22 and the first temperature sensor 22 After the second temperature sensor 23 contacts the center position and the edge position of the heat sink 3, respectively, the temperatures T ₁ and T ₂ of the center position and the edge position of the heat sink 3 are tested.

In step S15, the determining module 130 determines whether the test time for the heat sink 3 reaches the test time set by the initialization. If not, the test module 110 continues to control the heater 21 to heat the heat sink 3, and continues to test the temperature T ₁ and T ₂ of the center position and the edge position of the heat sink 3, and passes through the test state display module 120. T ₁ and T _{2 are} displayed.

If the determining module 130 determines that the test time for the heat sink 3 has reached the above Initializing the set test time, in step S16, the test module 110 controls the transmission device 24 to drive the first temperature sensor 22 and the second temperature sensor 23 to rotate, so that the first temperature sensor 22 and the second temperature sense The detector 23 leaves the radiator 3 and controls the heater 21 to stop heating the radiator 3.

In step S17, the test status display module 120 displays the test result through the display 11. The test results include the temperatures T ₁ and T ₂ of the center position and the edge position of the heat sink 3, and the thermal resistance coefficient θ of the heat sink 3.

In step S18, the determination module 130 determines whether the temperature of the heat sink 3 is too high. That is, it is judged whether the temperature T ₁ of the center position of the measured heat sink 3 is higher than the temperature maximum value T _{1max of} the set center position and the measured temperature T ₂ of the edge position of the heat sink 3 is higher than the set edge. The highest temperature of the position is T _2max .

If the T _{1 is} smaller than the T _1max and the T _{2 is} smaller than the T _2max , then in step S19 , the determining module 130 continues to determine whether the thermal resistance coefficient θ of the heat sink 3 is too high. The thermal resistance coefficient is a physical quantity that reflects the performance of the substance to conduct heat. The calculation formula of the thermal resistance coefficient θ is: θ=correction value+(T ₁ -T ₂ )/W

Where W represents the power of the heater 21 and the correction value represents an acceptable error value.

If the value of the thermal resistance coefficient θ is less than the maximum value θ _{max of} the set thermal resistance coefficient, then in step S20, the test status display module 120 displays the heat sink 3 through the test, and in step S23, the test status display module 120 displays the test. End.

If the determining module 130 determines in step S18 that the T _{1 is} greater than the T _1max and/or the T _{2 is} greater than the T _2max , then in step S21, the test status display module 120 displays that the heat sink 3 has not passed the test. And in step S22, the alarm module 140 prompts for the alarm information, and in step S23, the test status display module 120 displays the end of the test.

If the determination module 130 determines in step S19 that the thermal resistance coefficient θ is greater than the maximum value θ _{max of} the set thermal resistance coefficient, the process proceeds to step S21 described above.

In step S23, after the test status display module 120 displays the test, in step S24, the result storage module 150 stores the above test result in the memory of the host 10. The test results may include the test time for the heat sink 3, the temperatures T ₁ and T ₂ of the center position and the edge position of the heat sink 3, the thermal resistance coefficient θ of the heat sink 3, and whether the heat sink 3 passes the test or the like. So far, the implementation flow of the preferred embodiment of the heat sink coefficient test method of the heat sink is completed.

The heat sink thermal resistance coefficient tester and the test system and method provided by the invention can realize the measurement of the thermal resistance coefficient of the CPU heat sink, collect the test data, and can form a report, and analyze the test data to make the production more rationalized. .

The present invention has been described above in terms of preferred embodiments, and is not intended to limit the invention. The scope of the present invention is defined by the scope of the appended claims, unless otherwise claimed.

1‧‧‧ computer

10‧‧‧Host

11‧‧‧ Display

2‧‧‧ Radiator thermal resistance coefficient tester

21‧‧‧ heater

22‧‧‧First temperature sensor

23‧‧‧Second temperature sensor

24‧‧‧Transmission

25‧‧‧Center shaft fixed rod

26‧‧‧Test base

27‧‧‧Start button

28‧‧‧Test status display screen

3‧‧‧heatsink

100‧‧‧System Initialization Module

110‧‧‧Test module

120‧‧‧Test status display module

130‧‧‧Judgement module

140‧‧‧ alarm module

150‧‧‧Results storage module

1 is a system architecture diagram of a preferred embodiment of a heat sink coefficient test system for a heat sink of the present invention.

2 is a functional block diagram of a host in the computer of FIG. 1.

3 is a flow chart showing the implementation of a preferred embodiment of the method for testing the thermal resistance coefficient of the heat sink of the present invention.

Claims (8)

A heat sink thermal resistance coefficient tester includes: a heater for conducting heat to a heat sink to be tested; a first temperature sensor and a second temperature sensor, respectively Testing a temperature of a center position of the heat sink and a temperature of an edge position; and a transmission device for driving the first temperature sensor and the second temperature sensor to rotate, so that the first temperature sensing And the second temperature sensor respectively contact the center position and the edge position of the heat sink at the time of testing, and when the test is finished, the first temperature sensor and the second temperature sense are The detector leaves the heat sink. A heat sink thermal resistance coefficient testing system includes a computer and a heat sink thermal resistance coefficient tester, the computer includes a host and a display, and the heat sink thermal resistance coefficient tester is connected to the heat sink to be tested, and is connected to the cable through the cable. On the serial port of the host, wherein the heat sink thermal resistance coefficient tester comprises a heater, a first temperature sensor, a second temperature sensor and a transmission; the host comprises a heat sink thermal resistance coefficient a test program, the program comprising: a system initialization module, configured to receive an initial setting of the user, the initial setting includes setting a test time for the heat sink, and a temperature maximum value T _1max of the center position of the heat sink in the qualified state The highest temperature value T _2max with the edge position and the maximum value θ _{max of the} thermal resistance coefficient; the test module is configured to control the heater to heat the heat sink after the heat sink coefficient tester is started And controlling the transmission device to drive the first temperature sensor and the second temperature sensor to rotate, so that the first temperature sensor and the second temperature sensor respectively After the center position of the touch position of an edge of the heat sink, the heat sink temperature measurement is started and the center position and the edge position T ₁ of T _2, and [theta] is the thermal resistance coefficient of the heat sink, wherein the thermal coefficient of [theta] = correction value + (T1-T2) / W, where W represents the power and correction value of the heater represents an acceptable error value; and a determination module for determining whether the test time for the heat sink has arrived The set test time, and the temperature of the center position of the measured heat sink and the temperature of the edge position, respectively, and the measured thermal resistance coefficient of the heat sink and the set heat sink in a qualified state The highest temperature value of the center position is compared with the highest temperature value of the edge position and the maximum value of the set thermal resistance coefficient, and it is determined whether the heat sink passes the test, wherein if the θ is greater than the θ _max , or If T _{1 is} greater than the T _1max and/or the T _{2 is} greater than the T _2max , it is determined that the heat sink has not passed the test. The heat sink thermal resistance coefficient test system of claim 2, wherein the program further comprises: a test status display module, configured to display the test status and test result of the heat sink through the display The alarm module is configured to issue an alarm to prompt the user when the heat sink fails the test, and a result storage module for storing the test result of the heat sink in the host. The heat sink thermal resistance coefficient test system of claim 2, wherein the determining module determines that the temperature T _{1 of the} measured center position of the heat sink and the temperature T _{2 of the} edge position are not higher than respectively Determining a temperature maximum value T _1max of the center position of the heat sink in the qualified state and a temperature maximum value T _{2max of the} edge position, and determining that the heat resistance coefficient θ of the heat sink is not higher than the set thermal resistance coefficient When the maximum value is θ _max , the heat sink passes the test. A method for testing a thermal resistance coefficient of a heat sink, which uses a test system of the second application of the patent scope to test the thermal resistance coefficient of the heat sink, the method comprising the steps of: initializing the test system, the initial setting includes setting a heat dissipation Test time of the device, setting the highest temperature value T _1max of the center position of the heat sink in the qualified state and the temperature maximum value T _{2max of the} edge position, and the maximum value θ _{max of the} thermal resistance coefficient; starting the heat resistance of the heat sink a coefficient tester; measuring temperature T ₁ and T _{2 of} a center position and an edge position of the heat sink during the set test time, and measuring a thermal resistance coefficient θ of the heat sink, wherein the thermal resistance coefficient θ= Correction value + (T1-T2) / W, where W represents the power and correction value of the heater represents an acceptable error value; after the end of the test time, the center position and the edge position of the measured heat sink are determined and the heat sink temperature value T _1, T ₂ is higher than the set maximum value, respectively, T _1max and T _2max highest temperature at the center position in the position of the edge passing state; The center position of the heat sink temperature of the edge position of the measured value T _1, T _2, respectively, and the radiator is not higher than the set value T at the highest temperature in the center position of the highest and qualification status edge position _1max and T _2max , continuing to determine whether the measured thermal resistance coefficient θ of the heat sink is greater than a maximum value θ _{max of} the set thermal resistance coefficient; and if the measured thermal resistance coefficient θ of the heat sink is not greater than The maximum value of the set thermal resistance coefficient θ _max , then the heat sink passed the test. The method for testing a thermal resistance coefficient of a heat sink according to claim 5, wherein if the temperature of the central position of the measured heat sink is high, T _{1 is} at a center position of the set heat sink in a qualified state. The temperature highest value T _1max , and/or the temperature T _{2 of} the measured edge position of the heat sink is higher than the temperature maximum value T _{2max of} the set edge position of the heat sink in the qualified state, then the heat sink does not have Passed the test. The method for testing a thermal resistance coefficient of a heat sink according to claim 5, wherein the heat dissipation coefficient θ of the measured heat sink is greater than a maximum value θ _{max of} the set thermal resistance coefficient The device did not pass the test. The method for testing a thermal resistance coefficient of a heat sink according to claim 6 or 7, wherein the alarm information is prompted when the heat sink fails the test.