CN116880603A - Test temperature control device and method - Google Patents
Test temperature control device and method Download PDFInfo
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- CN116880603A CN116880603A CN202310860745.4A CN202310860745A CN116880603A CN 116880603 A CN116880603 A CN 116880603A CN 202310860745 A CN202310860745 A CN 202310860745A CN 116880603 A CN116880603 A CN 116880603A
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- 238000012360 testing method Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 96
- 230000006641 stabilisation Effects 0.000 claims description 3
- 238000011105 stabilization Methods 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims 1
- 239000002184 metal Substances 0.000 description 6
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011990 functional testing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The application discloses a test temperature control device and a test temperature control method, wherein the device comprises the following components: the temperature box is used for providing a basic temperature, and the basic temperature is lower than the target temperature; the module to be tested is arranged in the incubator and generates heat; the heating module is contacted with the tested module and does not work at the beginning; the temperature sensor is used for detecting the temperature of the module to be detected; when the temperature of the tested module is higher than the target temperature, the temperature box reduces the basic temperature, and the heating module does not work and is equivalent to a radiator due to contact with the tested module; when the temperature of the detected module is lower than the target temperature, the heating module starts to work to heat the detected module, so that the temperature of the detected module reaches the target temperature, heating is stopped after the temperature of the detected module reaches the target temperature, and when the temperature of the detected module is lower than the target temperature by a certain amplitude, the heating module continues to work to heat the detected module until the temperature of the detected module reaches the target temperature, and the operation is repeated continuously. The application has more accurate temperature control.
Description
Technical Field
The application belongs to the technical field of test temperature control, and particularly relates to a test temperature control device and a test temperature control method.
Background
The test includes temperature test, such as temperature cycle test, performance at different temperatures or functional test. In temperature-dependent testing, control of the temperature around the module (chip or module) under test is a critical technique. Under the prior art, a module to be tested is generally placed in an incubator, and the temperature consistency of each space in the incubator is maintained by air circulation; and a method for directly heating or cooling the module test seat to be tested is also provided. However, both have the disadvantage that the use of air as a heat transfer medium in the incubator has poor heat transfer efficiency and an excessive local temperature difference. Heating by using a test seat is a better method, but frosting and condensation exist when the temperature is reduced.
In the testing process of the temperature correlation of the tested module, the temperature around the tested module needs to be accurately controlled, and the tested module can generate heat, sometimes the heat can be even high, if the heat is not timely dissipated, the situation that the local temperature of the tested module is too high can occur, so that the test result is inaccurate.
Disclosure of Invention
The application aims to provide a test temperature control device and a test temperature control method, which solve the problem of inaccurate test results caused by heat generated by a tested module.
The technical scheme of the application is as follows:
a test temperature control device, the device comprising:
the temperature box is used for providing a basic temperature, and the basic temperature is lower than the target temperature;
the module to be tested is arranged in the incubator and generates heat;
the heating module is contacted with the tested module and does not work at the beginning;
the temperature sensor is used for detecting the temperature of the module to be detected; when the temperature of the tested module is higher than the target temperature, the temperature box reduces the basic temperature, the heating module does not work and is equivalent to a radiator because the heating module is contacted with the tested module; when the temperature of the detected module is lower than the target temperature, the heating module starts to work to heat the detected module, so that the temperature of the detected module reaches the target temperature, heating is stopped after the temperature of the detected module reaches the target temperature, and when the temperature of the detected module is lower than the target temperature by a certain amplitude, the heating module continues to work to heat the detected module until the temperature of the detected module reaches the target temperature, and the operation is repeated continuously.
Further, the heating module and the temperature sensor are both arranged on the tested module.
Further, the heating module and/or the temperature sensor is at least one.
Further, the material thermal conductivity of the heating module is higher than that of air, and metal is preferable.
Further, when the temperature of the measured module is exactly equal to the target temperature, the incubator maintains the base temperature and the heating module does not operate.
Further, the air in the box is dehumidified before testing.
A test temperature control method implemented by using the test temperature control device of any one of the above, comprising the steps of:
placing the tested module and the heating module in an incubator, and enabling the tested module and the heating module to be in contact with each other;
the temperature box provides a basic temperature, the tested module works and generates heat, and the heating module does not work;
after stabilization, detecting the temperature of the module to be detected by using a temperature sensor;
when the temperature of the tested module is higher than the target temperature, the temperature box reduces the basic temperature, the heating module does not work and is equivalent to a radiator because the heating module is contacted with the tested module; when the temperature of the detected module is lower than the target temperature, the heating module starts to work to heat the detected module, so that the temperature of the detected module reaches the target temperature, heating is stopped after the temperature of the detected module reaches the target temperature, and when the temperature of the detected module is lower than the target temperature by a certain amplitude, the heating module continues to work to heat the detected module until the temperature of the detected module reaches the target temperature, and the operation is repeated continuously.
Further, when the temperature of the measured module is exactly equal to the target temperature, the incubator maintains the base temperature and the heating module does not operate.
Further, the air in the box is dehumidified before testing.
Further, the heating module stops heating after the temperature of the measured module reaches the target temperature by a certain range.
Compared with the prior art, the application has the following advantages:
the application uses a method of coarse adjustment and fine adjustment, and can achieve the aim of accurately controlling the temperature: the temperature box is used for providing basic temperature, the temperature is used for coarse adjustment, and the heating module and the temperature module are used for cooperation and fine adjustment.
The device comprises three heat sources, namely an incubator, a heating module and a tested module. The prior art often does not consider the heat source of the tested module, or only takes air as a heat conduction medium, so that the temperature difference of the tested module is overlarge due to self-heating, and the accuracy of the test result is affected. The application uses metal as heat conduction medium, the heat conductivity is higher than that of air, the heat dissipation area is enlarged, the heat dissipation efficiency is high, and the temperature control is more accurate.
Drawings
Fig. 1 is a schematic structural view of a test temperature control device of the present application.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application. In addition, the technical features of the embodiments of the present application described below may be combined with each other as long as they do not collide with each other.
The prior art is divided into two types: one is a high-low temperature box scheme, which uses air as a heat conduction medium, has poor heat dissipation efficiency, and has the situation of overlarge local temperature difference; one is to directly use the heating mode of the top of the tested module, which has better effect in high temperature control and the possibility of frosting or condensation in low temperature control.
The application provides a test temperature control device, which comprises: the device comprises a temperature box, a measured module, a heating module and a temperature sensor.
Wherein, the incubator is used for providing basic temperature, and basic temperature needs to be less than target temperature. The base temperature may be determined synthetically from the target temperature and the heat generating capacity of the module under test. The stronger the heat generating capacity of the tested module, the farther the base temperature differs from the target temperature. The target temperature may also be directly used to subtract a constant value to obtain the base temperature.
The module to be tested is placed in the incubator and generates heat. After the module to be tested is placed in the incubator, the module to be tested can directly start to work so as to be stable before the subsequent temperature control.
The heating module is in contact with the module under test and does not operate at the beginning. Both the heating module and the temperature sensor can be arranged on the tested module. The heating module and/or the temperature sensor are at least one and can be covered on the tested module. When the temperature of the tested module is lower than the target temperature by a large amount, a plurality of heating modules can work together. The values sensed by the plurality of temperature sensors may be averaged to serve as the temperature of the module under test.
The material thermal conductivity of heating module is higher than air, and the preferential metal can improve heat conduction efficiency. When the heating module does not work, the heating module is in contact with the tested module, and the heating module is equivalent to a radiator. In addition, the area of the heating module contacted with the air is larger than that contacted with the tested module, which is equivalent to expanding the heat dissipation area of the tested module.
The temperature sensor is used for detecting the temperature of the module to be detected; when the temperature of the tested module is higher than the target temperature, the temperature box reduces the basic temperature, the heating module does not work and is equivalent to a radiator because the heating module is contacted with the tested module; when the temperature of the measured module is exactly equal to the target temperature, the temperature box maintains the basic temperature and the heating module does not work; when the temperature of the detected module is lower than the target temperature, the heating module starts to work to heat the detected module, so that the temperature of the detected module reaches the target temperature, heating is stopped after the temperature of the detected module reaches the target temperature, and when the temperature of the detected module is lower than the target temperature by a certain amplitude, the heating module continues to work to heat the detected module until the temperature of the detected module reaches the target temperature, and the operation is repeated continuously.
Furthermore, before the test, the air in the box is dehumidified to prevent frosting or condensation.
A test temperature control method implemented by using the test temperature control device of any one of the above, comprising the steps of:
placing the tested module and the heating module in an incubator, and enabling the tested module and the heating module to be in contact with each other;
the temperature box provides a basic temperature, the tested module works and generates heat, and the heating module does not work;
after stabilization, detecting the temperature of the module to be detected by using a temperature sensor;
when the temperature of the tested module is higher than the target temperature, the temperature box reduces the basic temperature, the heating module does not work and is equivalent to a radiator because the heating module is contacted with the tested module; when the temperature of the detected module is lower than the target temperature, the heating module starts to work to heat the detected module, so that the temperature of the detected module reaches the target temperature, heating is stopped after the temperature of the detected module reaches the target temperature, and when the temperature of the detected module is lower than the target temperature by a certain amplitude, the heating module continues to work to heat the detected module until the temperature of the detected module reaches the target temperature, and the operation is repeated continuously.
Further, when the temperature of the measured module is exactly equal to the target temperature, the incubator maintains the base temperature and the heating module does not operate.
Furthermore, before the test, the air in the box is dehumidified to prevent frosting or condensation.
Further, the heating module stops heating after the temperature of the measured module reaches the target temperature by a certain amplitude, namely, the temperature of the measured module is located near the target temperature.
Specifically, as shown in fig. 1, the outer side frame is an incubator, the lowest is a module to be measured, a block denoted by R is a heating module, and a block denoted by M is a temperature sensor. The heating module can heat, and if the temperature of the module to be measured is too high, the module is equivalent to a radiator, and heat can be radiated. This is because the heating module is made of a material having a higher thermal conductivity than air, such as metal. The metal heat conduction system is far higher than air (more than ten thousand times), and the heat is finally generated in the air, so that the metal heat conduction system is equivalent to a radiator (the contact area between the tested module and the air is increased) when the heating is stopped, and the heat is finally emitted because the environment basic temperature is lower than the target temperature.
The external high-low temperature box is used for providing the basic temperature of the operation of the tested module and is used for coarse adjustment of the temperature.
A heating module (a square block denoted by R in the figure) for heating and radiating heat.
A temperature sensor (indicated by a square block M in the figure) for acquiring temperature information.
And the temperature control module is used for cooperatively controlling the heating module and the temperature sensor, namely heating the material below the target temperature and radiating the heat above the target temperature, so that the temperature is accurately controlled within a range.
The temperature control method comprises the following steps:
when a high temperature is required, such as 60 ℃, the incubator heats the base temperature to 55 ℃ and the rest 5 ℃, and the heating module and the temperature monitoring module work cooperatively. When the heat generated by the heat source of the tested module is large and the monitored temperature exceeds 60 ℃, the basic temperature of the incubator is reduced, otherwise, the heating module is used for heating, heating is stopped when the temperature approaches to the target temperature, and heating is continued when the temperature is lower than the target temperature by a certain amplitude. The method can be used to control the temperature above room temperature.
When low temperature is needed, for example, the temperature in the incubator is reduced to about minus 42 ℃ at first, and then the surface temperature of the module to be measured is controlled at minus 40 ℃ by the cooperative work of the heating module and the temperature monitoring module.
When the temperature is about 0 ℃ to about room temperature, frost or dew may exist due to the existence of water vapor in the space, and a special process is needed for heating and cooling the incubator, such as dehumidification firstly, cooling to a target temperature, and then the temperature is controlled by the cooperation of the heating module and the temperature monitoring module.
The application can control all heat sources in the device and increase heat conduction efficiency; meanwhile, the temperature of the module to be measured can be accurately controlled by adopting a method of coarse adjustment and fine adjustment of the temperature.
It should be noted that, the order of steps in the foregoing embodiments does not mean the order of execution, and the order of execution of the steps should be determined by the functions and internal logic of the steps, and should not be construed as limiting the implementation of the embodiments of the present application.
It should be noted that each step/component described in the present application may be split into more steps/components, or two or more steps/components or part of operations of the steps/components may be combined into new steps/components, according to the implementation needs, to achieve the object of the present application.
It will be readily appreciated by those skilled in the art that the foregoing is merely a preferred embodiment of the application and is not intended to limit the application, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the application are intended to be included within the scope of the application.
Claims (10)
1. A test temperature control device, the device comprising:
an incubator for providing a base temperature, the base temperature being lower than a target temperature;
the tested module is arranged in the incubator and generates heat;
the heating module is contacted with the tested module and does not work at the beginning;
the temperature sensor is used for detecting the temperature of the tested module; when the temperature of the tested module is higher than the target temperature, the temperature box reduces the basic temperature, the heating module does not work and is equivalent to a radiator because the heating module is in contact with the tested module; when the temperature of the detected module is lower than the target temperature, the heating module starts to work to heat the detected module, so that the temperature of the detected module reaches the target temperature, heating is stopped after the temperature of the detected module reaches the target temperature, and when the temperature of the detected module is lower than the target temperature by a certain amplitude, the heating module continues to work to heat the detected module until the temperature of the detected module reaches the target temperature, and the operation is repeated continuously.
2. The test temperature control device of claim 1, wherein the heating module and the temperature sensor are both disposed on the module under test.
3. The test temperature control device of claim 1, wherein the heating module and/or the temperature sensor is at least one.
4. The test temperature control device of claim 1, wherein the heating module is a metallic material having a thermal conductivity higher than air.
5. The test temperature control device of claim 1, wherein the incubator maintains the base temperature and the heating module is inactive when the temperature of the module under test is exactly equal to the target temperature.
6. The test temperature control device of claim 1, wherein the air in the tank is dehumidified prior to testing.
7. A test temperature control method implemented by the test temperature control device according to any one of claims 1 to 6, comprising the steps of:
placing the tested module and the heating module in the incubator and enabling the tested module and the heating module to be in contact with each other;
the temperature box provides the basic temperature, the tested module works and generates heat, and the heating module does not work;
after stabilization, detecting the temperature of the module to be detected by using the temperature sensor;
when the temperature of the tested module is higher than the target temperature, the temperature box reduces the basic temperature, the heating module does not work and is equivalent to a radiator because the heating module is in contact with the tested module; when the temperature of the detected module is lower than the target temperature, the heating module starts to work to heat the detected module, so that the temperature of the detected module reaches the target temperature, heating is stopped after the temperature of the detected module reaches the target temperature, and when the temperature of the detected module is lower than the target temperature by a certain amplitude, the heating module continues to work to heat the detected module until the temperature of the detected module reaches the target temperature, and the operation is repeated continuously.
8. The test temperature control method of claim 7, wherein the incubator maintains the base temperature and the heating module is not operated when the temperature of the module under test is exactly equal to the target temperature.
9. The method of claim 7, wherein the air in the tank is dehumidified prior to testing.
10. The method according to claim 7, wherein the heating module stops heating after the temperature of the module under test reaches the target temperature by a certain amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310860745.4A CN116880603A (en) | 2023-07-13 | 2023-07-13 | Test temperature control device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310860745.4A CN116880603A (en) | 2023-07-13 | 2023-07-13 | Test temperature control device and method |
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| Publication Number | Publication Date |
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| CN116880603A true CN116880603A (en) | 2023-10-13 |
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| CN202310860745.4A Pending CN116880603A (en) | 2023-07-13 | 2023-07-13 | Test temperature control device and method |
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| CN (1) | CN116880603A (en) |
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- 2023-07-13 CN CN202310860745.4A patent/CN116880603A/en active Pending
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