A heat generating resistor regulator and system for matching MTBF testing

Abstract

The application provides a heating resistor regulator for matching MTBF test, which comprises a main fixed heating resistor and a variable trimming resistor. The main fixed heating resistor comprises a first end, a second end, a third end and a fourth end, and the first end of the main fixed heating resistor is connected with a first input end. The third end of the main fixed heating resistor is connected with a second input end. The fourth end of the main fixed heating resistor is connected with a second output end. The variable trimming resistor comprises a first end, a second end, a third end and a fourth end, and the first end of the variable trimming resistor is connected with the second end of the main fixed heating resistor. The second end of the variable trimming resistor is connected with a first output end. The third end of the variable trimming resistor is connected with the second input end. The fourth end of the variable trimming resistor is connected with the second output end. The output impedance adjustment according to the MTBF test is conducted by the passage of the first input end and the first output end or the second input end and the second output end. The application can reasonably utilize the existing resources, improve the test efficiency and product quality.

Description

Technical Field

[0001] This invention relates to the field of fault testing technology, and in particular to a heating resistor regulator and system for matching MTBF testing. Background Technology

[0002] Generally, the MTBF (Mean Time Between Failures) test is used to test the lifespan of adapters or car adapters.

[0003] Because the minimum test quantity is 30 pieces, a load cell with at least 30 unit channels is required to handle the load. However, it is generally not possible to prepare a load cell with 30 unit channels. Therefore, it is necessary to use a power-dissipating resistor as a power carrier. (Even if a load cell is available, it should not be placed in a working chamber at 60°C.)

[0004] For example: When testing an AC / Car adapter (output 19.0Vdc 230watt), a 1.66 ohm resistor is required (R = U). 2 / P) Power consumption of the heating resistor. Several batches of resistors were tested according to the testing requirements, including 35pcs 5ohm (first test), 35pcs 3.55ohm (second test), 35pcs 2.45ohm (third test), 35pcs 1.15ohm (fourth test), and 35pcs 1.0ohm (fifth test).

[0005] If testing a 230-watt AC adapter for FSP (Full Power Supply) MTBF, it would be necessary to purchase 35 pieces of 1.66-ohm resistors (a 230-watt resistor can reach over 150°C under full load, posing a significant safety hazard; therefore, the resistance remains the same, but a higher power buffer is required). Therefore, by using and adjusting appropriate variable resistors, the testing requirements for different adapter / car adapter specifications (voltage / power) can be met, eliminating the need to purchase a new batch of resistors for each test.

[0006] The current drawbacks are: 1. Regardless of whether it's an AC adapter or a car adapter, if the voltage, current, or power varies, a separate power consumption resistor needs to be purchased; 2. For example, a 19V-3.42A adapter requires a 5.5 ohm resistor, a 19V-4.74A adapter requires a 4 ohm resistor, a 12V-3.3A car adapter requires a 3.6 ohm resistor, a 12V-5A adapter requires a 2.4 ohm resistor, and a 19.5V-11.79A adapter requires a 1.66 ohm resistor, etc.; 3. If the impedance is too high, it cannot run at full load; if the impedance is too low, the adapter will be overloaded, causing the adapter to self-protect. Therefore, regardless of whether it's an AC adapter or a car adapter, if the voltage, current, or power varies, a separate power consumption resistor needs to be purchased, resulting in high costs. Summary of the Invention

[0007] The purpose of this invention is to address the aforementioned problems of the prior art by providing a heating resistance regulator and system for matching MTBF testing, thereby overcoming the shortcomings of the prior art.

[0008] Specifically, embodiments of the present invention provide a heating resistance regulator for matching MTBF testing, comprising:

[0009] The main fixed heating resistor includes a first terminal, a second terminal, a third terminal, and a fourth terminal. The first terminal of the main fixed heating resistor is connected to the first input terminal, the third terminal is connected to the second input terminal, and the fourth terminal is connected to the second output terminal.

[0010] The variable fine-tuning resistor includes a first terminal, a second terminal, a third terminal, and a fourth terminal. The first terminal of the variable fine-tuning resistor is connected to the second terminal of the main fixed heating resistor. The second terminal of the variable fine-tuning resistor is connected to the first output terminal. The third terminal of the variable fine-tuning resistor is connected to the second input terminal. The fourth terminal of the variable fine-tuning resistor is connected to the second output terminal.

[0011] The output impedance adjustment based on the MTBF test is achieved by connecting the first input terminal and the first output terminal or the second input terminal and the second output terminal.

[0012] As a further improvement to the above technical solution, the heating resistor regulator also includes:

[0013] A toggle switch is connected between the first terminal of the variable trimmer resistor and the second terminal of the main fixed heating resistor.

[0014] As a further improvement to the above technical solution, the switching switch is a transistor switch or a relay switch.

[0015] As a further improvement to the above technical solution, a first ammeter is connected in series between the first input terminal and the first output terminal, and a first voltmeter is connected in parallel between the first input terminal and the first output terminal. The output impedance of the MTBF test is matched by the calculated values ​​of the first ammeter and the first voltmeter.

[0016] As a further improvement to the above technical solution, a second ammeter is connected in series between the second input terminal and the second output terminal, and a second voltmeter is connected in parallel between the second input terminal and the second output terminal. The output impedance of the MTBF test is matched by the calculated values ​​of the second ammeter and the second voltmeter.

[0017] This invention also provides a heating resistance adjustment system for matching MTBF testing, comprising:

[0018] The main fixed heating resistor includes a first terminal, a second terminal, a third terminal, and a fourth terminal. The first terminal of the main fixed heating resistor is connected to the first input terminal, the third terminal of the main fixed heating resistor is connected to the second input terminal, and the fourth terminal of the main fixed heating resistor is connected to the second output terminal.

[0019] A variable trimmer resistor includes a first terminal, a second terminal, a third terminal, and a fourth terminal. The first terminal of the variable trimmer resistor is connected to the second terminal, which is the main fixed heating resistor. The second terminal of the variable trimmer resistor is connected to the first output terminal. The third terminal of the variable trimmer resistor is connected to the second input terminal. The fourth terminal of the variable trimmer resistor is connected to the second output terminal.

[0020] Communication circuits;

[0021] The path is adjusted by the first input terminal and the first output terminal or the second input terminal and the second output terminal based on the control information sent by the communication circuit according to the output impedance of the MTBF test.

[0022] As a further improvement to the above technical solution, the heating resistor regulator also includes:

[0023] A toggle switch is connected between the first terminal of the variable trimmer resistor and the second terminal of the main fixed heating resistor.

[0024] As a further improvement to the above technical solution, the switching switch is a transistor switch or a relay switch.

[0025] As a further improvement to the above technical solution, a first ammeter is connected in series between the first input terminal and the first output terminal, and a first voltmeter is connected in parallel between the first input terminal and the first output terminal. The output impedance of the MTBF test is matched by the calculated values ​​of the first ammeter and the first voltmeter.

[0026] As a further improvement to the above technical solution, a second ammeter is connected in series between the second input terminal and the second output terminal, and a second voltmeter is connected in parallel between the second input terminal and the second output terminal. The output impedance of the MTBF test is matched by the calculated values ​​of the second ammeter and the second voltmeter.

[0027] This invention provides a heating resistor regulator for MTBF matching testing, comprising a main fixed heating resistor and a variable trimming resistor. The main fixed heating resistor includes a first terminal, a second terminal, a third terminal, and a fourth terminal. The first terminal of the main fixed heating resistor is connected to a first input terminal. The third terminal of the main fixed heating resistor is connected to a second input terminal. The fourth terminal of the main fixed heating resistor is connected to a second output terminal. The variable trimming resistor also includes a first terminal, a second terminal, a third terminal, and a fourth terminal. The first terminal of the variable trimming resistor is connected to the second terminal of the main fixed heating resistor. The second terminal of the variable trimming resistor is connected to the first output terminal. The third terminal of the variable trimming resistor is connected to the second input terminal. The path is adjusted according to the output impedance of the MTBF test by connecting the first input terminal and the first output terminal, or the second input terminal and the second output terminal. Furthermore, this invention also proposes adjusting the path according to the output impedance of the MTBF test using control information sent by a communication circuit, by connecting the first input terminal and the first output terminal, or the second input terminal and the second output terminal, thus increasing functionality. This solution proposes that the test load is constructed by the main fixed heating resistor and the auxiliary trimming resistor. Test Method: ① Select the currently fixed resistor according to requirements; ② Based on the AC adapter / car adapter specifications and test requirements, fine-tune the variable resistor in series / parallel to make the ADTP (regulator) output at full load for MTBF testing. This invention eliminates the need to purchase rated load resistors multiple times for different voltages / currents, effectively saving time and improving efficiency. It also allows for the rational use of existing resources, improving test efficiency and product quality. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a block diagram of a heating resistor regulator for matching MTBF testing provided in Embodiment 1 of the present invention.

[0030] Figure 2 This is a block diagram of a heating resistor adjustment system for matching MTBF testing provided in Embodiment 2 of the present invention. Detailed Implementation

[0031] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0032] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] Example 1

[0037] like Figure 1 As shown, Figure 1 This is a block diagram of a heating resistor regulator (hereinafter referred to as "heating resistor regulator") for matching MTBF testing provided in Embodiment 1 of the present invention. The heating resistor regulator 100 includes a main fixed heating resistor 110 and a variable fine-tuning resistor 120. More specifically, the main fixed heating resistor 110 includes a first terminal, a second terminal, a third terminal, and a fourth terminal, and the variable fine-tuning resistor 120 includes a first terminal, a second terminal, a third terminal, and a fourth terminal.

[0038] In one embodiment, the first terminal of the main fixed heating resistor 110 is connected to the first input terminal input1, the third terminal of the main fixed heating resistor 110 is connected to the second input terminal input2, and the fourth terminal of the main fixed heating resistor 110 is connected to the second output terminal output2. For example, the first terminal of the variable fine-tuning resistor 120 is connected to the second terminal of the main fixed heating resistor 110, the second terminal of the variable fine-tuning resistor 120 is connected to the first output terminal output1, the third terminal of the variable fine-tuning resistor 120 is connected to the second input terminal input2, and the fourth terminal of the variable fine-tuning resistor 120 is connected to the second output terminal output2.

[0039] 3. For example, when the first terminal of the main fixed heating resistor 110 is connected to the first input terminal input1, the first terminal of the variable fine-tuning resistor 120 is connected to the second terminal of the main fixed heating resistor 110, and the second terminal of the variable fine-tuning resistor 120 is connected to the first output terminal output1, the main fixed heating resistor 110 and the variable fine-tuning resistor 120 are in series. When the third terminal of the main fixed heating resistor 110 is connected to the second input terminal input2, the third terminal of the variable fine-tuning resistor 120 is connected to the second input terminal input2, the fourth terminal of the main fixed heating resistor 110 is connected to the second output terminal output2, and the fourth terminal of the variable fine-tuning resistor 120 is connected to the second output terminal output2, the main fixed heating resistor 110 and the variable fine-tuning resistor 120 are in parallel. The output impedance adjustment based on the MTBF test is achieved by connecting the first input terminal input1 and the first output terminal output2, or the second input terminal input2 and the second output terminal output2. In other words, the main fixed heating resistor 110 and the variable fine-tuning resistor 120 are adjusted to either be in series or in parallel based on the output impedance of the MTBF test. The heating resistor regulator 100 also includes a switch (not shown) connected between the first terminal of the variable fine-tuning resistor 120 and the second terminal of the main fixed heating resistor 110. This switch can automatically adjust the main fixed heating resistor 110 and the variable fine-tuning resistor 120 to be in a series or parallel configuration, enhancing its automation capabilities. For example, the switch can be a transistor switch or a relay switch.

[0040] In other words, the test principle and test process of this scheme are as follows: 1. The main heating resistor (which can be regarded as the main fixed heating resistor 110) is connected in series or in parallel with the variable / fine-tuning resistor (which can be regarded as the variable fine-tuning resistor 120) to adjust the impedance, and the scheme is completed together. The main aspects of this scheme are: (1) Select the current fixed resistor according to the requirements; (2) According to the AC adapter / car adapter specifications and test requirements, the variable resistor is fine-tuned in series / parallel to make the ADTP output to full load for MTBF test; (3) Calculate the required impedance according to the 2-3 resistor series and parallel formula. 1 / R = 1 / R1 + 1 / R2 (or 1 / R3 is required). After the component has the appropriate impedance, run 1 pcs for test first, and put 30 pcs (or more) resistor components with adapter / car adapter into the high temperature test environment chamber. For example, in MTBF testing, high temperature accelerates aging, and it is usually necessary to use a customized ambient temperature of 40℃ & 60℃ (usually not applicable to curve temperatures). If only one temperature is used, the required duration is different. 40 degrees can withstand heat for longer, while 60 degrees takes much less time.

[0041] In one embodiment, a first ammeter (not shown) is connected in series between the first input terminal (input1) and the first output terminal (output1), and a first voltmeter (not shown) is connected in parallel between the first input terminal (input1) and the first output terminal (output1). The calculated values ​​from the first ammeter and the first voltmeter are used to match the output impedance of the MTBF test. The main fixed heating resistor 110 and the variable fine-tuning resistor 120 are in a series structure. For example, a second ammeter (not shown) is connected in series between the second input terminal (input2) and the second output terminal (output2), and a second voltmeter (not shown) is connected in parallel between the second input terminal (input2) and the second output terminal (output2). The calculated values ​​from the second ammeter and the second voltmeter are used to match the output impedance of the MTBF test. The main fixed heating resistor 110 and the variable fine-tuning resistor 120 are in a series structure. The main fixed heating resistor 110 and the variable fine-tuning resistor 120 can be automatically adjusted to a series or parallel structure according to the output impedance of the MTBF test, eliminating the need to purchase new resistors for each test and effectively reducing costs.

[0042] Example 2

[0043] like Figure 1 and Figure 2 As shown, Figure 2 This is a block diagram of a heating resistor adjustment system (hereinafter referred to as "heating resistor adjustment system") for matching MTBF testing provided in Embodiment 2 of the present invention.

[0044] The heating resistor adjustment system 200 includes:

[0045] The main fixed heating resistor includes a first terminal, a second terminal, a third terminal, and a fourth terminal. The first terminal of the main fixed heating resistor is connected to the first input terminal, the third terminal of the main fixed heating resistor is connected to the second input terminal, and the fourth terminal of the main fixed heating resistor is connected to the second output terminal.

[0046] A variable trimmer resistor includes a first terminal, a second terminal, a third terminal, and a fourth terminal. The first terminal of the variable trimmer resistor is connected to the second terminal, which is the main fixed heating resistor. The second terminal of the variable trimmer resistor is connected to the first output terminal. The third terminal of the variable trimmer resistor is connected to the second input terminal. The fourth terminal of the variable trimmer resistor is connected to the second output terminal.

[0047] Communication circuit 230;

[0048] The path is adjusted by the first input terminal and the first output terminal or the second input terminal and the second output terminal based on the control information sent by the communication circuit 230 according to the output impedance of the MTBF test.

[0049] In one embodiment, the heating resistor adjustment system 200 further includes:

[0050] A toggle switch is connected between the first terminal of the variable trimmer resistor and the second terminal of the main fixed heating resistor.

[0051] In one embodiment, the switching switch is a transistor switch or a relay switch.

[0052] In one embodiment, a first ammeter is connected in series between the first input terminal and the first output terminal, and a first voltmeter is connected in parallel between the first input terminal and the first output terminal. The output impedance of the MTBF test is matched by the calculated values ​​of the first ammeter and the first voltmeter.

[0053] In one embodiment, a second ammeter is connected in series between the second input terminal and the second output terminal, and a second voltmeter is connected in parallel between the second input terminal and the second output terminal. The output impedance of the MTBF test is matched by the calculated values ​​of the second ammeter and the second voltmeter.

[0054] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0055] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A heating resistor regulator for matching MTBF testing, characterized in that, The heating resistor regulator used for matching MTBF testing includes: The main fixed heating resistor includes a first terminal, a second terminal, a third terminal, and a fourth terminal. The first terminal of the main fixed heating resistor is connected to a first input terminal, the third terminal of the main fixed heating resistor is connected to a second input terminal, and the fourth terminal of the main fixed heating resistor is connected to a second output terminal. A variable fine-tuning resistor includes a first terminal, a second terminal, a third terminal, and a fourth terminal. The first terminal of the variable fine-tuning resistor is connected to the second terminal of the main fixed heating resistor. The second terminal of the variable fine-tuning resistor is connected to the first output terminal. The third terminal of the variable fine-tuning resistor is connected to the second input terminal. The fourth terminal of the variable fine-tuning resistor is connected to the second output terminal. The output impedance adjustment based on the MTBF test is achieved by connecting the first input terminal and the first output terminal or the second input terminal and the second output terminal. A switching switch is connected between the first end of the variable fine-tuning resistor and the second end of the main fixed heating resistor.

2. The heating resistor regulator for matching MTBF testing according to claim 1, characterized in that, The switching switch is a transistor switch or a relay switch.

3. The heating resistor regulator for matching MTBF testing according to claim 1, characterized in that, A first ammeter is connected in series between the first input terminal and the first output terminal, and a first voltmeter is connected in parallel between the first input terminal and the first output terminal. The output impedance of the MTBF test is matched by the calculated values ​​of the first ammeter and the first voltmeter.

4. The heating resistor regulator for matching MTBF testing according to claim 1, characterized in that, A second ammeter is connected in series between the second input terminal and the second output terminal, and a second voltmeter is connected in parallel between the second input terminal and the second output terminal. The calculated values ​​of the second ammeter and the second voltmeter are used to match the output impedance of the MTBF test.

5. A heating resistor adjustment system for matching MTBF testing, characterized in that, The heating resistor adjustment system for matching MTBF testing includes: The main fixed heating resistor includes a first terminal, a second terminal, a third terminal, and a fourth terminal. The first terminal of the main fixed heating resistor is connected to the first input terminal, the third terminal of the main fixed heating resistor is connected to the second input terminal, and the fourth terminal of the main fixed heating resistor is connected to the second output terminal. A variable trimmer resistor includes a first terminal, a second terminal, a third terminal, and a fourth terminal. The first terminal of the variable trimmer resistor is connected to the second terminal of the main fixed heating resistor. The second terminal of the variable trimmer resistor is connected to a first output terminal. The third terminal of the variable trimmer resistor is connected to a second input terminal. The fourth terminal of the variable trimmer resistor is connected to a second output terminal. Communication circuits; The path is adjusted by the control information sent by the communication circuit based on the output impedance of the MTBF test, which is connected to either the first input terminal and the first output terminal or the second input terminal and the second output terminal. A switching switch is connected between the first end of the variable fine-tuning resistor and the second end of the main fixed heating resistor.

6. The heating resistor adjustment system for matching MTBF testing according to claim 5, characterized in that, The switching switch is a transistor switch or a relay switch.

7. The heating resistor adjustment system for matching MTBF testing according to claim 5, characterized in that, A first ammeter is connected in series between the first input terminal and the first output terminal, and a first voltmeter is connected in parallel between the first input terminal and the first output terminal. The output impedance of the MTBF test is matched by the calculated values ​​of the first ammeter and the first voltmeter.

8. The heating resistor adjustment system for matching MTBF testing according to claim 5, characterized in that, A second ammeter is connected in series between the second input terminal and the second output terminal, and a second voltmeter is connected in parallel between the second input terminal and the second output terminal. The calculated values ​​of the second ammeter and the second voltmeter are used to match the output impedance of the MTBF test.

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