WO2007104229A1 - Method and system for evaluating the corrosion risk of a circuit board - Google Patents

Method and system for evaluating the corrosion risk of a circuit board Download PDF

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Publication number
WO2007104229A1
WO2007104229A1 PCT/CN2007/000653 CN2007000653W WO2007104229A1 WO 2007104229 A1 WO2007104229 A1 WO 2007104229A1 CN 2007000653 W CN2007000653 W CN 2007000653W WO 2007104229 A1 WO2007104229 A1 WO 2007104229A1
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WO
WIPO (PCT)
Prior art keywords
circuit board
insulation resistance
resistance value
corrosion
risk
Prior art date
Application number
PCT/CN2007/000653
Other languages
French (fr)
Chinese (zh)
Inventor
Puyang Chen
Yan Xu
Original Assignee
Huawei Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2007104229A1 publication Critical patent/WO2007104229A1/en

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0266—Marks, test patterns or identification means
    • H05K1/0268—Marks, test patterns or identification means for electrical inspection or testing
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0213—Electrical arrangements not otherwise provided for
    • H05K1/0254—High voltage adaptations; Electrical insulation details; Overvoltage or electrostatic discharge protection ; Arrangements for regulating voltages or for using plural voltages
    • H05K1/0256—Electrical insulation details, e.g. around high voltage areas
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/07—Electric details
    • H05K2201/0753—Insulation
    • H05K2201/0761—Insulation resistance, e.g. of the surface of the PCB between the conductors
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
    • H05K2203/16—Inspection; Monitoring; Aligning
    • H05K2203/162—Testing a finished product, e.g. heat cycle testing of solder joints

Definitions

  • the present invention relates to the field of testing technology for electronic devices, and more particularly to a method and system for assessing the risk of corrosion of a circuit board. Background of the invention
  • the surface of the board and its components is contaminated during the manufacturing process and the surface is contaminated by dust deposits during use.
  • the traces on the surface of the board, the body of the device and the solder joints may corrode, eventually causing the board to be corroded and fail. How to predict the corrosion risk of the board in combination with actual environmental factors has always been a problem in the industry.
  • the degree of ionic contamination can be used to quantify the extent to which the surface of the test plate is contaminated with inorganic ions.
  • the degree of corrosion can be characterized by the degree of ionic contamination, the calculation relationship is very complicated, and the corrosion risk of the board cannot be evaluated in time. Therefore, measures are taken to prevent corrosion of the circuit board.
  • the practice of the present invention provides a method and system for assessing the risk of corrosion of a circuit board that can accurately and accurately assess the risk of corrosion of the board and its components in the operating environment.
  • a method of assessing the risk of corrosion of a circuit board including:
  • the corrosion risk of the circuit board is determined according to the surface insulation resistance value of the circuit board.
  • a system for assessing the risk of corrosion from a circuit board including:
  • test module for measuring a surface insulation resistance value of the circuit board
  • the discriminating module determines the risk of corrosion of the board according to the insulation resistance value of the surface of the board. It can be seen from the above technical solutions that the embodiment of the present invention reflects the severity of the comprehensive operating environment conditions such as the pollution degree and the relative humidity of the surface of the circuit board in the use environment by the surface insulation resistance value of the circuit board, thereby obtaining the corrosion of the circuit board. The risk is to take precautions to prevent the board from continuing to run and being corroded. BRIEF DESCRIPTION OF THE DRAWINGS
  • 1 is a schematic view showing measurement of surface insulation resistance according to an embodiment of the present invention
  • FIG. 2 is a flow chart of a method for evaluating the risk of corrosion of a circuit board according to an embodiment of the present invention
  • FIG. 3 is a schematic view showing a variation trend of surface insulating resistance under different degrees of chloride ion contamination and different relative humidity according to an embodiment of the present invention
  • FIG. 4 is a discriminant mapping table for evaluating the risk of corrosion of a circuit board according to an embodiment of the present invention
  • FIG. 5 is a schematic structural diagram of a system for evaluating the risk of corrosion of a circuit board according to an embodiment of the present invention. Mode for carrying out the invention
  • the surface insulator resistance of the circuit board is closely related to the degree of contamination of the circuit board.
  • the contamination of the board area combined with the influence of moisture will reduce the surface insulation resistance value, under the same humidity, pollution.
  • SIR Surface Insulation Resistance
  • FIG. 2 is a flow chart of a method for evaluating the risk of corrosion of a circuit board in accordance with an embodiment of the present invention.
  • the specific steps for evaluating the risk of corrosion of the circuit board include:
  • step S01 when measuring the surface insulation resistance of the circuit board, the circuit itself may be used, such as two adjacent wires of the insulation, or two adjacent pins of the insulation or two adjacent pins and wires of the insulation.
  • the insulation resistance test pattern on the board can refer to the comb pattern of IPC-B-25, or you can design the test pattern (SIR Test Pattern, for example, Comb Coupon), but it always appears as two conductors on the surface of the insulating material. Test the insulation resistance on the top.
  • step S01 if the board is tested and its surface insulation resistance is tested, the environmental conditions of the test should be consistent with the environmental conditions of the board in the chassis, and It is best to take the circuit board near the fan to test the insulation resistance between the device or the surface trace on the board.
  • the position of the test pattern can be based on the heat when the frame is working. Distribution, placing the test pattern on a veneer or veneer surface where the working surface temperature is not much different from the actual ambient temperature.
  • Step S02. Comparing the surface insulation resistance value with the circuit board corrosion risk discrimination map to determine a mapping relationship of the surface insulation resistance value in the mapping, the circuit board corrosion risk discrimination map includes different resistance value ranges and Corresponding board corrosion risk, etc. Level mapping relationship.
  • Figure 3 is a schematic diagram showing the trend of changes in surface insulation resistance under different degrees of chloride ion contamination and different relative humidity. It can be seen from Figure 3 that the magnitude of the surface insulation resistance indirectly reflects the combined effects of corrosive factors such as pollutants and moisture. From the detection data shown in FIG. 3, the discrimination mapping relationship of the corrosion risk of the circuit board can be obtained, that is, the mapping relationship between the resistance value range and the corresponding board corrosion risk level, and the corrosion risk of the circuit board is determined.
  • the mapping may be a corrosion risk discriminant mapping table storing the mapping relationship, as shown in FIG.
  • the resistance value range to which the measured resistance value belongs is determined in the discrimination map.
  • Step S03. Determine a board corrosion risk level according to the mapping relationship.
  • the corrosion risk level of the board corresponding to the range of resistance values in the discrimination map is found, and the pollution degree is determined: when the surface insulation resistance value is above 10 9 , the surface of the circuit board is clean, the circuit board and The component has no risk of corrosion; when the surface insulation resistance value is reduced to 10 8 level, it indicates that the relative humidity of the circuit board is low, and there is no obvious corrosion risk; when the surface insulation resistance value is reduced to 10 7 level, it indicates surface of the board have a certain ionic contaminants, and high relative humidity of the operating environment, there is a certain risk of corrosion; reduced surface insulation resistance when the level 106, indicating that the board continues to run in this environment will be operating more Large corrosion risk; When the surface insulation resistance drops to 10 5 or lower, it indicates that the operating conditions of the board are very bad and it is very easy to fail. Thus, by measuring the surface insulation resistance value and comparing it with the board corrosion risk discrimination map, the corrosion risk level of the board is obtained.
  • Step S04. After determining the corrosion risk level of the circuit board, the corrosion risk level value of the circuit board may be displayed, and the display device may directly display the risk level value by using the LED display screen, or display the risk level by using other analog and digital display devices. value. Display device Connected to the device for testing the risk level, after knowing the surface insulation power P and the risk level corresponding to the value, the risk level is displayed on the screen or any other displayable manner, so that the risk level displayed can be timely according to the displayed Know the degree of pollution corrosion of the circuit board at this stage, and it is easy to take countermeasures to deal with it.
  • step S04 after determining the corrosion risk level value of the circuit board, the alarm operation may be performed according to different values of the corrosion risk level of the circuit board, or the corrosion risk level of the circuit board may be displayed, and then the alarm operation may be performed according to different risk level values.
  • the alarm operation is performed by the alarm device, and an alarm device may be used for the case where the operation cannot be monitored on site.
  • the alarm device is connected to the display device, and when the display device displays the current risk level of the circuit board, an alarm is issued for different risk levels.
  • the method of alarming includes: arranging alarm sounds with different heights and different frequencies by alarm devices such as rabi or buzzer to distinguish the alarm level, until the user obtains the warning information and processes the alarm, and then stops the alarm; means to emit light striking warning alarm to alert the user of the level of risk of corrosion of the circuit board, the warning light can be of different colors, different blink frequencies to distinguish ⁇ : Gen police level.
  • the risk level of corrosion of the circuit board can be obtained, so that the circuit board can be quickly evaluated. Risk of corrosion; By displaying and 4 alarm devices, the user can be notified of the risk of corrosion of the board in time for processing.
  • FIG. 5 is a schematic diagram of a system structure for evaluating the risk of corrosion of a circuit board according to an embodiment of the present invention. As shown in FIG. 5, the system includes: a test module 02 and a discriminating module 03. In this embodiment, the system evaluates the risk of corrosion of the board 01.
  • Test module 02 includes test device 022.
  • the test device 022 is used to measure the insulation resistance value of the surface of the circuit board 01, and a voltage U is applied between adjacent conductors of the circuit board 01 to test the current value Is under the voltage, and then according to Ohm's law.
  • the surface insulation resistance between the adjacent conductors The test method is shown in Figure 1: where L is the spacing between two adjacent conductors, D is the pitch of the wires, and L and D together characterize the surface insulation resistivity.
  • the test device 022 may be a resistance tester for testing the insulation resistance of the circuit board, or a conductor resistance test pattern disposed on the insulating material of the circuit board 01. Take out the board 01 during the test, and use the circuit on the circuit board 01, such as the two adjacent wires of the insulation, the two adjacent pins of the insulation, or the two adjacent pins and the wires of the insulation, etc., using high resistance. Test the surface insulation resistance, or use the commercially available simple surface insulation resistance test to directly test the insulation resistance of the surface of the board 01. Since the surface insulation resistance changes due to environmental conditions, when the board is taken out and tested for its surface insulation resistance, the environmental conditions to be tested should be consistent with the environmental conditions of the board in the frame, and it is better to take it near the fan. The board is used to test the insulation resistance between the devices on the board or the traces on the surface.
  • the test module 02 further includes a test start unit 021 connected to the test device 022 for transmitting a start measurement indication, and the test device 022 is started to perform a test operation on the circuit board 01 for measuring the surface insulation resistance value of the circuit board. It can be started manually in real time, or the test startup unit 021 can be used to set an appropriate startup time. The operator can set the start time of the test device 022 through the test start unit 021 according to the operating environment of the circuit board and the actual operation condition, so that the test device 022 performs periodic or non-periodic measurement resistance operation.
  • the discriminating module 03 is connected to the test module 02 for receiving the test result of the test module 02, and comparing and obtaining the risk level of the circuit board 01.
  • the discriminating module 03 specifically includes a corrosion risk discriminating mapping table 031 and an evaluating unit 032:
  • the corrosive risk discriminating mapping table 031 is connected to the evaluating unit 032 for preserving a mapping relationship between the resistance value range and the corresponding board corrosion risk level.
  • Fig. 3 is a schematic diagram showing the change trend of surface insulation resistance under different degrees of chloride ion contamination and different relative humidity. As can be seen from Figure 3, the magnitude of the surface insulation resistance is indirectly reversed. Reflects the combined effects of corrosive factors such as pollutants and moisture.
  • the discrimination map of the corrosion risk of the circuit board can be obtained from the detection data shown in FIG. 3, that is, the mapping relationship between the resistance value range and the corrosion risk level of the circuit board corresponding thereto, and the discrimination map of the corrosion risk of the circuit board It may be a corrosion risk discrimination mapping table storing the mapping relationship, as shown in FIG.
  • the evaluation unit 032 receives the surface insulation resistance value of the circuit board measured by the test module 02 and determines the range of the resistance value in the risk discrimination target table, and searches for the corresponding board corrosion risk level according to the resistance value range in the risk determination map.
  • Conducting pollution degree determination When the surface insulation resistance value is above 10 9 , it indicates that the surface of the circuit board is clean, and the circuit board and its components have no risk of corrosion.
  • the surface insulation resistance value When the surface insulation resistance value is reduced to 10 8 level, it indicates that the circuit board is in the operating environment. The relative humidity is low, and there is no obvious risk of corrosion. When the surface insulation resistance value is reduced to 10 7 level, it indicates that there is a certain amount of ionic pollutants on the surface of the circuit board, and the relative humidity of the operating environment is high, and there is a certain risk of corrosion; when the surface insulation resistance decreased to 106 levels, that the boards will continue to run a greater risk of corrosion in such operating conditions; when the surface insulation resistance drops to level 105 or lower, indicating that operation of the circuit board The conditions are very harsh and extremely easy to fail. In this way, the corrosion risk of the board is obtained by measuring the surface insulation resistance value and comparing it with the board corrosion risk discrimination map.
  • system further includes a display device 041 coupled to the discrimination module 03 for displaying the determined board corrosion risk level value.
  • the system further includes an alarm device 042 coupled to the discriminating module 03 for performing an alarm operation on the measured board corrosion risk level value or connected to the display device 041, according to different board corrosion risk level values displayed by the display device 041. Different alarm operations.
  • the display device 041 can directly display the risk level value by using the LED display screen, and can also display the risk level value by using other digital display devices; the alarm device 042 can sound an alarm sound through an alarm device such as a horn or a buzzer.
  • the illuminating device can emit an eye-catching warning light to alert the user to the level of corrosion risk of the circuit board.
  • the circuit itself is used on the circuit board 01 (such as two adjacent wires insulated, or two adjacent pins insulated or two adjacent pins of the insulation) Wire, etc.), use a high-resistance meter to test the surface insulation resistance; or use a commercial simple surface insulation resistance tester to directly test the insulation resistance of the surface of the circuit board 01; in addition, it can also be arranged on the circuit board 01 Test the graph to monitor the surface insulation resistance in real time.
  • the insulation resistance test pattern on the board 01 can refer to the comb pattern of IPC-B-25, or the test pattern can be designed by itself, but it is always reflected in the insulation resistance test on the two conductors on the surface of the insulating material. In the circuit board manufacturing process, the insulation resistance test pattern to be tested is arranged, which can reduce the test error of the surface insulation resistance value of the test pattern inconsistency.
  • the environmental conditions to be tested should be consistent with the environmental conditions of the circuit board 01 in the frame, preferably near the fan.
  • the circuit board 01 is used to test the insulation resistance value between the devices on the board or the surface traces.
  • the insulation resistance test pattern arranged on the circuit board 01 is used, the position of the test pattern can be tested according to the heat distribution during operation of the frame.
  • the graphic is placed on the surface of the veneer or veneer whose working surface temperature is not much different from the actual ambient temperature.
  • the measurement of the insulation resistance of the surface of the circuit board is completed by the system of the embodiment, and the corrosion risk of the circuit board is quickly determined by comparison with the corrosion risk discrimination mapping table, and the circuit board can be accordingly correspondingly deal with.
  • the corrosion risk of the circuit board in the application environment can be accurately and timely evaluated in order to take timely preventive measures to maintain reliable operation of the device; and the surface insulation resistance of the circuit board
  • the value data is easier to obtain than the board pollution degree data, thus solving the problem of complicated board contamination test.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)

Abstract

A method for evaluating the corrosion risk of a circuit board includes: determining an insulation resistance of said circuit board and judging the corrosion risk of the circuit board from the surface insulation resistance value of said circuit board. A system for evaluating the corrosion risk of a circuit board includes a testing module for determining a surface insulation resistance value of a circuit board and a judging module for judging the corrosion risk of the circuit board from the surface insulation resistance value of said circuit board.

Description

评估电路板腐蚀风险的方法和*** 技术领域  Method and system for assessing corrosion risk of a circuit board
本发明涉及电子设备的测试技术领域， 尤其涉及一种评估电路板腐 蚀风险的方法和***。 发明背景  The present invention relates to the field of testing technology for electronic devices, and more particularly to a method and system for assessing the risk of corrosion of a circuit board. Background of the invention
电路板及其组件表面在制造过程中会受到污染， 在使用时表面也会 由于沉积粉尘而受到污染。 在离子污染、 潮气等综合因素的作用下， 电 路板表面的走线、 器件本体及焊点都可能发生腐蚀， 最终导致电路板单 板被腐蚀而失效。 如何结合实际的环境因素来预测电路板的受腐蚀风 险， 一直是业界的难题。  The surface of the board and its components is contaminated during the manufacturing process and the surface is contaminated by dust deposits during use. Under the combined effects of ionic pollution and moisture, the traces on the surface of the board, the body of the device and the solder joints may corrode, eventually causing the board to be corroded and fail. How to predict the corrosion risk of the board in combination with actual environmental factors has always been a problem in the industry.
离子污染度可用于量化试验板表面受无机离子污染的程度。 电路板 及其组件在实际环境中由于潮气、 离子污染等原因被腐蚀时， 虽然可以 用离子污染度来表征腐蚀情况， 但是其计算关系十分复杂， 在实际应用 中无法及时评估电路板的腐蚀风险从而采取措施预防电路板腐蚀， 尤其 是现场测试电路板污染度的难度很大， 操作不方便， 很难得到在电路板 的运行环境下评估该电路板腐蚀风险的相关数据。 发明内容  The degree of ionic contamination can be used to quantify the extent to which the surface of the test plate is contaminated with inorganic ions. When the circuit board and its components are corroded due to moisture, ion pollution, etc. in the actual environment, although the degree of corrosion can be characterized by the degree of ionic contamination, the calculation relationship is very complicated, and the corrosion risk of the board cannot be evaluated in time. Therefore, measures are taken to prevent corrosion of the circuit board. In particular, it is difficult to test the pollution degree of the circuit board in the field, and the operation is inconvenient, and it is difficult to obtain relevant data for evaluating the corrosion risk of the circuit board in the operating environment of the circuit board. Summary of the invention
本发明的实施提出了一种评估电路板腐蚀风险的方法和***, 能够 及时准确地评估电路板及其组件在运行环境中的腐蚀风险。  The practice of the present invention provides a method and system for assessing the risk of corrosion of a circuit board that can accurately and accurately assess the risk of corrosion of the board and its components in the operating environment.
一种评估电路板腐蚀风险的方法， 包括：  A method of assessing the risk of corrosion of a circuit board, including:
测量电路板的表面绝缘电阻值；  Measuring the surface insulation resistance value of the circuit board;
根据所述电路板的表面绝缘电阻值确定电路板的腐蚀风险。 一种评估电路板腐蚀风险的***， 包括： The corrosion risk of the circuit board is determined according to the surface insulation resistance value of the circuit board. A system for assessing the risk of corrosion from a circuit board, including:
测试模块， 测量电路板的表面绝缘电阻值；  a test module for measuring a surface insulation resistance value of the circuit board;
判别模块， 根据电路板表面绝缘电阻值， 确定电路板腐蚀风险。 由上述技术方案可见， 本发明的实施例通过电路板的表面绝缘电阻 值来反映在使用环境下电路板表面的污染度和相对湿度等综合运行环 境条件的恶劣程度， 进而得出电路板被腐蚀的风险， 以便采取预防措施 以免电路板持续运行下去被腐蚀失效。 附图简要说明  The discriminating module determines the risk of corrosion of the board according to the insulation resistance value of the surface of the board. It can be seen from the above technical solutions that the embodiment of the present invention reflects the severity of the comprehensive operating environment conditions such as the pollution degree and the relative humidity of the surface of the circuit board in the use environment by the surface insulation resistance value of the circuit board, thereby obtaining the corrosion of the circuit board. The risk is to take precautions to prevent the board from continuing to run and being corroded. BRIEF DESCRIPTION OF THE DRAWINGS
图 1是本发明实施例的表面绝缘电阻测量示意图；  1 is a schematic view showing measurement of surface insulation resistance according to an embodiment of the present invention;
图 2是本发明实施例的评估电路板腐蚀风险的方法流程图； ' 图 3是本发明实施例的不同氯离子污染度、 不同相对湿度下表面绝 缘电阻的变化趋势示意图；  2 is a flow chart of a method for evaluating the risk of corrosion of a circuit board according to an embodiment of the present invention; FIG. 3 is a schematic view showing a variation trend of surface insulating resistance under different degrees of chloride ion contamination and different relative humidity according to an embodiment of the present invention;
图 4是本发明实施例的评估电路板腐蚀风险的一种判别映射表； 图 5是本发明实施例的评估电路板腐蚀风险的***结构示意图。 实施本发明的方式  4 is a discriminant mapping table for evaluating the risk of corrosion of a circuit board according to an embodiment of the present invention; and FIG. 5 is a schematic structural diagram of a system for evaluating the risk of corrosion of a circuit board according to an embodiment of the present invention. Mode for carrying out the invention
下面结合附图及具体实施例， 对本发明进行详细说明。  The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
电路板的表面绝缘体电阻和电路板的污染程度有密切的关系， 电路 板在实际应用中， 板面积聚的污染物结合潮气的影响 , 会使表面绝缘电 阻值下降， 在同等的湿度下， 污染越高， 表面绝缘电阻越低； 在同等的 污染度下， 湿度越高， 表面绝缘电阻越低。 因此， 表面绝缘电阻值的大 小间接地反映了污染物和潮气等腐蚀性因素对电路板的综合影响。  The surface insulator resistance of the circuit board is closely related to the degree of contamination of the circuit board. In practical applications, the contamination of the board area combined with the influence of moisture will reduce the surface insulation resistance value, under the same humidity, pollution. The higher the surface insulation resistance, the lower the humidity and the lower the surface insulation resistance at the same degree of contamination. Therefore, the magnitude of the surface insulation resistance value indirectly reflects the combined effects of corrosive factors such as contaminants and moisture on the board.
表面绝缘电阻（ SIR, Surface Insulation Resistance )是指物质表面两 相邻金属面积间的电阻值。 表面绝缘电阻的测试原理根据欧姆定律： Rs = U/Is, 即在相邻导体间施加一个电压 U, 测试在该电压作用下的电流 值 Is, 再根据欧姆定律即可得出该相邻导体间的表面绝缘电阻。 测试方 法如图 1所示： 其中 L为两相邻导体的间距， D为导线的间距， L和 D 共同表征表面绝缘电阻率。 Surface Insulation Resistance (SIR) refers to the resistance between two adjacent metal areas on the surface of a substance. The principle of testing the surface insulation resistance according to Ohm's law: Rs = U / Is, that is, a voltage U is applied between adjacent conductors, the current value Is under the voltage is tested, and the surface insulation resistance between the adjacent conductors can be obtained according to Ohm's law. The test method is shown in Figure 1: where L is the spacing between two adjacent conductors, D is the spacing of the conductors, and L and D together characterize the surface insulation resistivity.
图 2是本发明实施例的评估电路板腐蚀风险的方法流程图， 在该实 施例中， 评估电路板腐蚀风险的具体步骤包括：  2 is a flow chart of a method for evaluating the risk of corrosion of a circuit board in accordance with an embodiment of the present invention. In this embodiment, the specific steps for evaluating the risk of corrosion of the circuit board include:
' 步驟 S01. 测量电路板表面绝缘电阻值。  'Step S01. Measure the surface insulation resistance value of the board.
在步骤 S01中， 测量电路板表面绝缘电阻时， 可以利用电路板上本 身的线路， 比如绝缘的两相邻走线、 或者绝缘的两相邻引脚或者绝缘的 两相邻引脚与走线等， 使用高阻测量计测试表面绝缘电阻； 也可以使用 商品化的简易表面绝缘电阻测试仪， 直接测试电路板表面的绝缘电阻； 还可以在电路板上布置相应的测试图形来实时监测表面绝缘电阻。 电路 板上的绝缘电阻测试图形可参照 IPC-B-25的梳状图形，也可以自行设计 测试图形（SIR Test Pattern,如， Comb Coupon ), 但总是体现为在绝缘材 料表面的两个导体上进行绝缘电阻的测试。  In step S01, when measuring the surface insulation resistance of the circuit board, the circuit itself may be used, such as two adjacent wires of the insulation, or two adjacent pins of the insulation or two adjacent pins and wires of the insulation. Etc., use a high-resistance meter to test the surface insulation resistance; you can also use a commercial simple surface insulation resistance tester to directly test the insulation resistance of the surface of the board; you can also arrange the corresponding test pattern on the board to monitor the surface insulation in real time. resistance. The insulation resistance test pattern on the board can refer to the comb pattern of IPC-B-25, or you can design the test pattern (SIR Test Pattern, for example, Comb Coupon), but it always appears as two conductors on the surface of the insulating material. Test the insulation resistance on the top.
由于表面绝缘电阻会因为环境条件的影响而发生变化， 所以在步骤 S01 中， 如果将电路板取出后测试其表面绝缘电阻， 测试的环境条件应 与电路板在机框内的环境条件一致， 而且最好取靠近风扇部位的电路板 来测试其板上器件或者表层走线间的绝缘电阻值； 采用电路板上布置的 绝缘电阻测试图形时， 该测试图形的位置可根据机框工作时的热分布， 将测试图形放置在工作表面温度与实际环境温度相差不大的单板或者 单板表面。  Since the surface insulation resistance changes due to environmental conditions, in step S01, if the board is tested and its surface insulation resistance is tested, the environmental conditions of the test should be consistent with the environmental conditions of the board in the chassis, and It is best to take the circuit board near the fan to test the insulation resistance between the device or the surface trace on the board. When using the insulation resistance test pattern arranged on the circuit board, the position of the test pattern can be based on the heat when the frame is working. Distribution, placing the test pattern on a veneer or veneer surface where the working surface temperature is not much different from the actual ambient temperature.
步骤 S02. 将表面绝缘电阻值与电路板腐蚀风险判别映射进行比 较， 确定该表面绝缘电阻值在所述映射中的映射关系， 所述电路板腐蚀 风险判别映射包含不同电阻值范围和与其——对应的电路板腐蚀风险等 级的映射关系。 Step S02. Comparing the surface insulation resistance value with the circuit board corrosion risk discrimination map to determine a mapping relationship of the surface insulation resistance value in the mapping, the circuit board corrosion risk discrimination map includes different resistance value ranges and Corresponding board corrosion risk, etc. Level mapping relationship.
图 3是不同氯离子污染度、 不同相对湿度下表面绝缘电阻的变化趋 势示意图。 由图 3可见， 表面绝缘电阻值的大小间接地反映了污染物和 潮气等腐蚀性因素的综合影响。 由图 3所示的检测数据可以得到所述电 路板腐蚀风险的判别映射关系， 即电阻值范围和与其——对应的电路板 腐蚀风险等级之间的映射关系， 所述电路板腐蚀风险的判別映射可以为 一存储所述映射关系的腐蚀风险判別映射表， 如图 4所示。  Figure 3 is a schematic diagram showing the trend of changes in surface insulation resistance under different degrees of chloride ion contamination and different relative humidity. It can be seen from Figure 3 that the magnitude of the surface insulation resistance indirectly reflects the combined effects of corrosive factors such as pollutants and moisture. From the detection data shown in FIG. 3, the discrimination mapping relationship of the corrosion risk of the circuit board can be obtained, that is, the mapping relationship between the resistance value range and the corresponding board corrosion risk level, and the corrosion risk of the circuit board is determined. The mapping may be a corrosion risk discriminant mapping table storing the mapping relationship, as shown in FIG.
根据测量所得的电路板表面绝缘电阻值与所述电路板腐蚀风险的 判别映射进行比较， 在判别映射中确定所述测量的电阻值所属的电阻值 范围。  Comparing the measured surface insulation resistance value of the circuit board with the discrimination map of the corrosion risk of the circuit board, the resistance value range to which the measured resistance value belongs is determined in the discrimination map.
步驟 S03.根据所述的映射关系确定电路板腐蚀风险等级。  Step S03. Determine a board corrosion risk level according to the mapping relationship.
根据确定的电阻值范围， 查找到与判别映射中的电阻值范围对应的 电路板腐蚀风险等级， 进行污染度判定： 当表面绝缘电阻值在 109以上 时， 表明电路板表面洁净， 电路板及其组件无腐蚀风险； 当表面绝缘电 阻值降低至 108级别时， 表明电路板的运行环境中相对湿度较低， 也无 明显的腐蚀风险； 当表面绝缘电阻值降低至 107级别时， 表明电路板表 面有一定的离子污染物， 同时运行环境的相对湿度较高， 存在一定的腐 蚀风险； 当表面绝缘电阻降至 106级别时， 表明电路板在这种运行环境 下继续运行会有较大的腐蚀风险； 当表面绝缘电阻下降至 105級别或者 更低时， 表明电路板的运行条件非常恶劣， 极容易失效。 这样， 通过测 量表面绝缘电阻值， 并将其与电路板腐蚀风险判别映射相比较就得到了 电路板的腐蚀风险等级。 According to the determined range of resistance values, the corrosion risk level of the board corresponding to the range of resistance values in the discrimination map is found, and the pollution degree is determined: when the surface insulation resistance value is above 10 9 , the surface of the circuit board is clean, the circuit board and The component has no risk of corrosion; when the surface insulation resistance value is reduced to 10 8 level, it indicates that the relative humidity of the circuit board is low, and there is no obvious corrosion risk; when the surface insulation resistance value is reduced to 10 7 level, it indicates surface of the board have a certain ionic contaminants, and high relative humidity of the operating environment, there is a certain risk of corrosion; reduced surface insulation resistance when the level 106, indicating that the board continues to run in this environment will be operating more Large corrosion risk; When the surface insulation resistance drops to 10 5 or lower, it indicates that the operating conditions of the board are very bad and it is very easy to fail. Thus, by measuring the surface insulation resistance value and comparing it with the board corrosion risk discrimination map, the corrosion risk level of the board is obtained.
步骤 S04. 确定电路板腐蚀风险等级之后， 可以将所述电路板腐蚀 风险等级值显示出来，显示装置可以采用 LED显示屏直接显示风险等级 值， 也可以使用其它的模拟、 数字显示装置显示风险等级值。 显示装置 与测试风险等级的装置相连接， 当获知表面绝缘电 P且值对应的风险等级 后， 将该风险等级通过屏幕或者其它任何可以显示的方式显示出来， 这 样， 就可以根据显示的风险等级及时地获知电路板现阶段的污染腐蚀程 度， 便于采取应对措施进行处理。 Step S04. After determining the corrosion risk level of the circuit board, the corrosion risk level value of the circuit board may be displayed, and the display device may directly display the risk level value by using the LED display screen, or display the risk level by using other analog and digital display devices. value. Display device Connected to the device for testing the risk level, after knowing the surface insulation power P and the risk level corresponding to the value, the risk level is displayed on the screen or any other displayable manner, so that the risk level displayed can be timely according to the displayed Know the degree of pollution corrosion of the circuit board at this stage, and it is easy to take countermeasures to deal with it.
在步骤 S04中， 确定电路板腐蚀风险等级值后， 也可以根据所述电 路板腐蚀风险等级的不同值进行报警操作， 或者显示该电路板腐蚀风险 等级后再根据不同的风险等级值进行报警操作。 所述报警操作由报警装 置执行， 对于操作无法现场监控的情况， 可以采用报警装置。 报警装置 与显示装置连接， 当显示装置显示出电路板现阶段的风险等级时， 针对 不同的风险等级进行报警。 其中报警的方式包括： 通过喇 p八或蜂鸣器等 报警装置发出高低不同、 频率不同的报警声音来区分报警级别， 直到用 户得到预警信息并进行处理后才停止本次报警； 还可以通过发光装置发 出醒目的警示灯光来报警， 提醒用户电路板腐蚀风险的级别， 警示灯光 可以用不同的颜色、 不同的闪烁频率来区分^ :艮警的等级。 In step S04, after determining the corrosion risk level value of the circuit board, the alarm operation may be performed according to different values of the corrosion risk level of the circuit board, or the corrosion risk level of the circuit board may be displayed, and then the alarm operation may be performed according to different risk level values. . The alarm operation is performed by the alarm device, and an alarm device may be used for the case where the operation cannot be monitored on site. The alarm device is connected to the display device, and when the display device displays the current risk level of the circuit board, an alarm is issued for different risk levels. The method of alarming includes: arranging alarm sounds with different heights and different frequencies by alarm devices such as rabi or buzzer to distinguish the alarm level, until the user obtains the warning information and processes the alarm, and then stops the alarm; means to emit light striking warning alarm to alert the user of the level of risk of corrosion of the circuit board, the warning light can be of different colors, different blink frequencies to distinguish ^: Gen police level.
在本发明的这一实施例中， 通过采用测量电路板的表面绝缘电阻 值， 并与电路板被腐蚀风险判别映射进行比较， 能够获得电路板被腐蚀 的风险等级， 从而可以快速地评估电路板被腐蚀的风险； 通过显示与 4艮 警装置，可以及时的把电路板受腐蚀的风险情况通知用户以便进行处理。  In this embodiment of the invention, by measuring the surface insulation resistance value of the circuit board and comparing it with the corrosion risk discrimination map of the circuit board, the risk level of corrosion of the circuit board can be obtained, so that the circuit board can be quickly evaluated. Risk of corrosion; By displaying and 4 alarm devices, the user can be notified of the risk of corrosion of the board in time for processing.
图 5是本发明实施例的评估电路板腐蚀风险的***结构示意图。 如 图 5所示， 该***包括： 测试模块 02和判别模块 03。 在本实施例中， 该***对电路板 01的腐蚀风险进行评估。  FIG. 5 is a schematic diagram of a system structure for evaluating the risk of corrosion of a circuit board according to an embodiment of the present invention. As shown in FIG. 5, the system includes: a test module 02 and a discriminating module 03. In this embodiment, the system evaluates the risk of corrosion of the board 01.
测试模块 02包括测试装置 022。所述测试装置 022用于测量电路板 01表面的绝缘电阻值， 在电路板 01的相邻导体间施加一个电压 U, 测 试在该电压作用下的电流值 Is, 再根据欧姆定律即可得出该相邻导体间 的表面绝缘电阻。 测试方法如图 1所示： 其中 L为两相邻导体的间距， D为导线的间距， L与 D共同表征表面绝缘电阻率。 测试装置 022测得 电路板 01的表面绝缘电阻值后，将测试结果传送到电阻值发送单元， 电 阻值发送单元将测试装置 022的测试结果发送到判别模块 03进行比较。 其中， 测试装置 022可以是测试电路板绝缘电阻的电阻测试仪， 或者为 布置在电路板 01 的绝缘材料上的导体电阻测试图形。 测试时将电路板 01取出， 利用电路板 01上本身的线路， 比如绝缘的两相邻走线、 绝缘 的两相邻引脚， 或者绝缘的两相邻引脚与走线等， 使用高阻计测试表面 绝缘电阻， 也可以使用商品化的简易表面绝缘电阻测试 ^义， 直接测试电 路板 01表面的绝缘电阻。 由于表面绝缘电阻会因环境条件影响而变化， 所以将电路板取出后测试其表面绝缘电阻时， 测试的环境条件应与电路 板在机框内的环境条件一致， 而且最好取靠近风扇部位的电路板来测试 其板上器件或者表层走线间的绝缘电阻值。 Test module 02 includes test device 022. The test device 022 is used to measure the insulation resistance value of the surface of the circuit board 01, and a voltage U is applied between adjacent conductors of the circuit board 01 to test the current value Is under the voltage, and then according to Ohm's law. The surface insulation resistance between the adjacent conductors. The test method is shown in Figure 1: where L is the spacing between two adjacent conductors, D is the pitch of the wires, and L and D together characterize the surface insulation resistivity. After the test device 022 measures the surface insulation resistance value of the circuit board 01, the test result is transmitted to the resistance value transmission unit, and the resistance value transmission unit transmits the test result of the test device 022 to the discrimination module 03 for comparison. The test device 022 may be a resistance tester for testing the insulation resistance of the circuit board, or a conductor resistance test pattern disposed on the insulating material of the circuit board 01. Take out the board 01 during the test, and use the circuit on the circuit board 01, such as the two adjacent wires of the insulation, the two adjacent pins of the insulation, or the two adjacent pins and the wires of the insulation, etc., using high resistance. Test the surface insulation resistance, or use the commercially available simple surface insulation resistance test to directly test the insulation resistance of the surface of the board 01. Since the surface insulation resistance changes due to environmental conditions, when the board is taken out and tested for its surface insulation resistance, the environmental conditions to be tested should be consistent with the environmental conditions of the board in the frame, and it is better to take it near the fan. The board is used to test the insulation resistance between the devices on the board or the traces on the surface.
测试模块 02还包括测试启动单元 021 ,该测试启动单元 021与测试 装置 022连接， 用于发送启动测量指示， 启动测试装置 022对待测电路 板 01进行测试操作，对于电路板表面绝缘电阻值的测量可以人工实时启 动， 也可以通过测试启动单元 021来设定合适的启动时间。 操作人员可 以根据电路板的运行环境和实际运行情况通过测试启动单元 021来设定 测试装置 022的启动时间， 使测试装置 022进行周期性或者非周期性测 量电阻操作。  The test module 02 further includes a test start unit 021 connected to the test device 022 for transmitting a start measurement indication, and the test device 022 is started to perform a test operation on the circuit board 01 for measuring the surface insulation resistance value of the circuit board. It can be started manually in real time, or the test startup unit 021 can be used to set an appropriate startup time. The operator can set the start time of the test device 022 through the test start unit 021 according to the operating environment of the circuit board and the actual operation condition, so that the test device 022 performs periodic or non-periodic measurement resistance operation.
判别模块 03与测试模块 02相连接， 用于接收测试模块 02的测试 结果， 比较并获取电路板 01的风险等级。 判别模块 03具体包括腐蚀风 险判别映射表 031和评估单元 032: 腐蚀风险判别映射表 031与评估单 元 032相连接， 用于保存电阻值范围和与其 对应的电路板腐蚀风险 等级的映射关系。 图 3是不同氯离子污染度、 不同相对湿度下表面绝缘 电阻的变化趋势示意图。 由图 3可见， 表面绝缘电阻值的大小间接地反 映了污染物和潮气等腐蚀性因素的综合影响。 由图 3所示的检测数据可 以得到所述电路板腐蚀风险的判别映射， 即电阻值范围和与其一一对应 的电路板腐蚀风险等级之间的映射关系， 所述电路板腐蚀风险的判别映 射可以为一存储所述映射关系的腐蚀风险判别映射表， 如图 4所示。 评 估单元 032接收测试模块 02测量的电路板表面绝缘电阻值并确定所属风 险判别射表中的电阻值范围， 根据电阻值范围在风险判别映射表中进行 查找得到对应的电路板腐蚀风险等级， 从而进行污染度判定： 当表面绝 缘电阻值在 109以上时， 表明电路板表面洁净， 电路板及其组件无腐蚀 风险； 当表面绝缘电阻值降低至 108级别时， 表明电路板的运行环境中 相对湿度较低， 也无明显的腐蚀风险； 当表面绝缘电阻值降低至 107级 别时， 表明电路板表面有一定的离子污染物， 同时运行环境的相对湿度 较高， 存在一定的腐蚀风险； 当表面绝缘电阻降至 106级别时， 表明电 路板在这种运行环境下继续运行会有较大的腐蚀风险； 当表面绝缘电阻 下降至 105级别或者更低时， 这表明电路板的运行条件非常恶劣， 极容 易失效。 这样通过测量表面绝缘电阻值， 并将其与电路板腐蚀风险判别 映射表相比较就得到了电路板的腐蚀风险。 The discriminating module 03 is connected to the test module 02 for receiving the test result of the test module 02, and comparing and obtaining the risk level of the circuit board 01. The discriminating module 03 specifically includes a corrosion risk discriminating mapping table 031 and an evaluating unit 032: The corrosive risk discriminating mapping table 031 is connected to the evaluating unit 032 for preserving a mapping relationship between the resistance value range and the corresponding board corrosion risk level. Fig. 3 is a schematic diagram showing the change trend of surface insulation resistance under different degrees of chloride ion contamination and different relative humidity. As can be seen from Figure 3, the magnitude of the surface insulation resistance is indirectly reversed. Reflects the combined effects of corrosive factors such as pollutants and moisture. The discrimination map of the corrosion risk of the circuit board can be obtained from the detection data shown in FIG. 3, that is, the mapping relationship between the resistance value range and the corrosion risk level of the circuit board corresponding thereto, and the discrimination map of the corrosion risk of the circuit board It may be a corrosion risk discrimination mapping table storing the mapping relationship, as shown in FIG. The evaluation unit 032 receives the surface insulation resistance value of the circuit board measured by the test module 02 and determines the range of the resistance value in the risk discrimination target table, and searches for the corresponding board corrosion risk level according to the resistance value range in the risk determination map. Conducting pollution degree determination: When the surface insulation resistance value is above 10 9 , it indicates that the surface of the circuit board is clean, and the circuit board and its components have no risk of corrosion. When the surface insulation resistance value is reduced to 10 8 level, it indicates that the circuit board is in the operating environment. The relative humidity is low, and there is no obvious risk of corrosion. When the surface insulation resistance value is reduced to 10 7 level, it indicates that there is a certain amount of ionic pollutants on the surface of the circuit board, and the relative humidity of the operating environment is high, and there is a certain risk of corrosion; when the surface insulation resistance decreased to 106 levels, that the boards will continue to run a greater risk of corrosion in such operating conditions; when the surface insulation resistance drops to level 105 or lower, indicating that operation of the circuit board The conditions are very harsh and extremely easy to fail. In this way, the corrosion risk of the board is obtained by measuring the surface insulation resistance value and comparing it with the board corrosion risk discrimination map.
此外， 该***还包括显示装置 041 , 和判别模块 03连接， 用于将确 定的电路板腐蚀风险等级值显示出来。  In addition, the system further includes a display device 041 coupled to the discrimination module 03 for displaying the determined board corrosion risk level value.
该***还包括报警装置 042, 与判别模块 03连接， 用于对测量的电 路板腐蚀风险等级值进行报警操作， 或者与显示装置 041连接， 根据显 示装置 041显示的不同电路板腐蚀风险等级值进行不同的报警操作。  The system further includes an alarm device 042 coupled to the discriminating module 03 for performing an alarm operation on the measured board corrosion risk level value or connected to the display device 041, according to different board corrosion risk level values displayed by the display device 041. Different alarm operations.
在该***中，显示装置 041可以采用 LED显示屏直接显示风险等级 值， 也可以使用其他的数字显示装置显示风险等级值； 报警装置 042可 以通过喇叭或蜂鸣器等报警装置发出报警声音， 还可以通过发光装置发 出醒目的警示灯光来报警， 提醒用户电路板腐蚀风险的级别。 该***中的测试模块 02测量电路板表面绝缘电阻时， 利用电路板 01 上本身的线路 (比如绝缘的两相邻走线、 或者绝缘的两相邻引脚或者 绝缘的两相邻引脚与走线等)， 使用高阻测量计测试表面绝缘电阻； 或者 使用商品化的简易表面绝缘电阻测试仪，直接测试电路板 01表面的绝缘 电阻； 此外，还可以采用在电路板 01上布置相应的测试图形来实时监测 表面绝缘电阻。 电路板 01上的绝缘电阻测试图形可参照 IPC-B-25的梳 状图形， 也可以自行设计测试图形， 但总是体现为在绝缘材料表面的两 个导体上进行绝缘电阻测试。 在电路板制作过程中就布置好待测的绝缘 电阻测试图形，可以减小测试图形不一致对表面绝缘电阻值的测试误差。 In the system, the display device 041 can directly display the risk level value by using the LED display screen, and can also display the risk level value by using other digital display devices; the alarm device 042 can sound an alarm sound through an alarm device such as a horn or a buzzer. The illuminating device can emit an eye-catching warning light to alert the user to the level of corrosion risk of the circuit board. When the test module 02 in the system measures the surface insulation resistance of the circuit board, the circuit itself is used on the circuit board 01 (such as two adjacent wires insulated, or two adjacent pins insulated or two adjacent pins of the insulation) Wire, etc.), use a high-resistance meter to test the surface insulation resistance; or use a commercial simple surface insulation resistance tester to directly test the insulation resistance of the surface of the circuit board 01; in addition, it can also be arranged on the circuit board 01 Test the graph to monitor the surface insulation resistance in real time. The insulation resistance test pattern on the board 01 can refer to the comb pattern of IPC-B-25, or the test pattern can be designed by itself, but it is always reflected in the insulation resistance test on the two conductors on the surface of the insulating material. In the circuit board manufacturing process, the insulation resistance test pattern to be tested is arranged, which can reduce the test error of the surface insulation resistance value of the test pattern inconsistency.
由于表面绝缘电阻会因环境条件影响而变化，测试模块 02测试电路 板 01的表面绝缘电阻时， 测试的环境条件应与电路板 01在机框内的环 境条件一致，最好取靠近风扇部位的电路板 01来测试其板上器件或者表 层走线间的绝缘电阻值； 釆用电路板 01上布置的绝缘电阻测试图形时， 该测试图形的位置可根据机框工作时的热分布， 将测试图形放置在工作 表面温度与实际环境温度相差不大的单板或者单板表面。  Since the surface insulation resistance changes due to environmental conditions, when the test module 02 tests the surface insulation resistance of the circuit board 01, the environmental conditions to be tested should be consistent with the environmental conditions of the circuit board 01 in the frame, preferably near the fan. The circuit board 01 is used to test the insulation resistance value between the devices on the board or the surface traces. When the insulation resistance test pattern arranged on the circuit board 01 is used, the position of the test pattern can be tested according to the heat distribution during operation of the frame. The graphic is placed on the surface of the veneer or veneer whose working surface temperature is not much different from the actual ambient temperature.
这样，通过本实施例的***就完成了对电路板表面绝缘电阻的测量， 并通过与腐蚀风险判别映射表的比较， 快速地判别出电路板的腐蚀风 险， 并可以据此对电路板进行相应处理。  In this way, the measurement of the insulation resistance of the surface of the circuit board is completed by the system of the embodiment, and the corrosion risk of the circuit board is quickly determined by comparison with the corrosion risk discrimination mapping table, and the circuit board can be accordingly correspondingly deal with.
在本发明的实施例中， 通过测量电路板的表面绝缘电阻值， 能够及 时准确地评估电路板在应用环境下的腐蚀风险以便及时采取预防措施， 维持设备的可靠运行； 并且电路板表面绝缘电阻值数据较之电路板污染 度数据更容易获取， 从而解决了电路板污染度测试复杂的问题。  In the embodiment of the present invention, by measuring the surface insulation resistance value of the circuit board, the corrosion risk of the circuit board in the application environment can be accurately and timely evaluated in order to take timely preventive measures to maintain reliable operation of the device; and the surface insulation resistance of the circuit board The value data is easier to obtain than the board pollution degree data, thus solving the problem of complicated board contamination test.
以上所述， 仅为本发明的较佳实施例而已， 并非用于限定本发明的 保护范围， 凡在本发明的精神和原则之内所做的任何修改、 等同替换、 改进等， 均应包含在本发明的保护范围之内。  The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modifications, equivalents, improvements, etc., which are made within the spirit and principles of the present invention, should be included. It is within the scope of the invention.

Claims

权利要求书 Claim
1、 一种评估电路板腐蚀风险的方法， 其特征在于， 所述方法包括： 测量电路板的表面绝缘电阻值；  What is claimed is: 1. A method for assessing a risk of corrosion of a circuit board, the method comprising: measuring a surface insulation resistance value of the circuit board;
确定所述电路板的表面绝缘电阻值对应的电路板的腐蚀风险。  Determining the corrosion risk of the circuit board corresponding to the surface insulation resistance value of the circuit board.
2、 如权利要求 1 所述的方法， 其特征在于， 所述确定所述电路板 的表面绝缘电阻值对应的电路板的腐蚀风险， 包括：  2. The method according to claim 1, wherein the determining a corrosion risk of the circuit board corresponding to the surface insulation resistance value of the circuit board comprises:
确定所述电路板的表面绝缘电阻值的电阻值范围；  Determining a range of resistance values of a surface insulation resistance value of the circuit board;
根据电阻值范围与腐蚀风险的映射关系确定 确定的电阻值范围 对应的电路板的腐蚀风险。  According to the mapping relationship between the resistance value range and the corrosion risk, the determined resistance value range corresponds to the corrosion risk of the board.
3、 如权利要求 1 所述的方法， 其特征在于， 进一步包括： 设置所 述测量电路板的表面绝缘电阻值的启动时间。  3. The method of claim 1, further comprising: setting a start time of a surface insulation resistance value of the measurement circuit board.
4、 如权利要求 1所述的方法， 其特征在于， 进一步包括： 显示所述电路板的腐蚀风险。  4. The method of claim 1 further comprising: displaying a corrosion risk of the circuit board.
5、 如权利要求 1或 4所述的方法， 其特征在于， 进一步包括： - 根据所述电路板的腐蚀风险进行报警。  5. The method of claim 1 or 4, further comprising: - alerting based on a corrosion risk of the circuit board.
6、 一种评估电路板腐蚀风险的***， 其特征在于, 包括：  6. A system for assessing corrosion risk of a circuit board, characterized by comprising:
测试模块， 测量电路板的表面绝缘电阻值；  a test module for measuring a surface insulation resistance value of the circuit board;
判别模块， 根据电路板表面绝缘电阻值确定电路板腐蚀风险。  The discriminating module determines the risk of corrosion of the board according to the insulation resistance value of the surface of the board.
7、如权利要求 6所述的***， 其特征在于， 所述测试模块为测试电 路板表面绝缘电阻的电阻测试仪， 或者为布置在电路板绝缘材料上的绝 缘电阻测试图形 SIR Test Pattern。  The system according to claim 6, wherein the test module is a resistance tester for testing the surface insulation resistance of the circuit board, or an insulation resistance test pattern SIR Test Pattern disposed on the insulation material of the circuit board.
8、 如权利要求 6所述的***， 其特征在于， 所述测试模块包括： 测试启动单元， 设置所述测量电路板的表面绝缘电阻值的启动时间 并在到达所述启动时间时发送启动测量指示；  8. The system according to claim 6, wherein the test module comprises: a test start unit, setting a start time of a surface insulation resistance value of the measurement circuit board, and transmitting a start measurement when the start time is reached Instruction
测试装置， 根据所述启动测量指示测量电路板的表面绝缘电阻值。 And a testing device that measures a surface insulation resistance value of the circuit board according to the startup measurement indication.
9、 如权利要求 6所述的***， 其特征在于， 所述判别模块包括： 存储单元， 存储描述电阻值范围与腐蚀风险的映射关系的腐蚀风险 判别映射表； The system according to claim 6, wherein the discriminating module comprises: a storage unit, storing a corrosion risk discriminant mapping table describing a mapping relationship between a resistance value range and a corrosion risk;
评估单元， 通过查询存储单元中的腐蚀风险判别映射表确定所述电 路板的表面绝缘电阻值对应的电路板腐蚀风险。  The evaluation unit determines the corrosion risk of the board corresponding to the surface insulation resistance value of the circuit board by querying the corrosion risk discrimination mapping table in the storage unit.
10、如权利要求 6所述的***， 其特征在于， 进一步包括显示装置， 用于显示所述电路板的腐蚀风险。  10. The system of claim 6 further comprising display means for displaying a corrosion risk of said circuit board.
11、 如权利要求 6或 10所述的***， 其特征在于， 进一步包括报警 装置， 用于按所述电路板的腐蚀风险进行报警。  11. The system of claim 6 or 10, further comprising an alarm device for alerting the corrosion risk of the circuit board.
PCT/CN2007/000653 2006-03-13 2007-03-01 Method and system for evaluating the corrosion risk of a circuit board WO2007104229A1 (en)

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