CN107884701A - A kind of experimental provision and experimental method of circuit board tolerance overvoltage damage - Google Patents
A kind of experimental provision and experimental method of circuit board tolerance overvoltage damage Download PDFInfo
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- CN107884701A CN107884701A CN201710948608.0A CN201710948608A CN107884701A CN 107884701 A CN107884701 A CN 107884701A CN 201710948608 A CN201710948608 A CN 201710948608A CN 107884701 A CN107884701 A CN 107884701A
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- circuit board
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- test box
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
- G01R31/2825—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere in household appliances or professional audio/video equipment
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2832—Specific tests of electronic circuits not provided for elsewhere
- G01R31/2836—Fault-finding or characterising
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2832—Specific tests of electronic circuits not provided for elsewhere
- G01R31/2836—Fault-finding or characterising
- G01R31/2849—Environmental or reliability testing, e.g. burn-in or validation tests
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention provides a kind of experimental provision of circuit board tolerance overvoltage damage, including test box, in addition to can make in the test box in varying strength electric field pulse voltage occur system, control and adjust the test box internal temperature temperature control system, place circuit board under test support and data handling system.Invention also provides a kind of experimental method of circuit board tolerance overvoltage damage, using experimental provision as above.The experimental provision and experimental method of a kind of circuit board tolerance overvoltage damage provided by the invention, can be in the case of different temperatures, high electric field, respectively to the quality testing of circuit board.
Description
Technical field
It is especially a kind of to be resistant to overvoltage damage in circuit board the present invention relates to a kind of test device of circuit board
Experimental provision and corresponding experimental method.
Background technology
Circuit board is equipped with general electricity piece, such as in the broadcast system of EMUs, is again provided with controlling audio
The circuit board of the contents such as input and output, and broadcast system is the important component of motor-car, is that passenger understands train operation in time
The important channel of situation, information of arriving at a station etc., but due to the influence of various environmental factors, cause broadcast system not open normally,
Export sound it is rotten, can not normal play a series of problems, such as, these dysfunctions have had a strong impact on the driving impression of passenger.
Because transient overvoltage caused by the reasons such as bow net harmonic wave and Switching Power Supply all can be to vehicle-mounted broadcasting circuit in motor-car running
Plate causes damage and shortens its service life, while causes localized hyperthermia to vehicle-mounted using centralization installation in view of often saving compartment
The influence of broadcast circuit plate performance, therefore it is very necessary to study damage of the overvoltage to vehicle-mounted broadcasting circuit under different temperatures.
Currently without the system that test is resistant to grade close under bullet train actual condition that can effectively test and assess, therefore without nothing
Method carries out being resistant to the assessment of overvoltage grade to high-speed train vehicle-mounted broadcast circuit, so being badly in need of a kind of fairly simple, quick simulation
Test the test system of high-speed train vehicle-mounted broadcast circuit tolerance overvoltage damage and corresponding survey under real work state temperature
Method for testing.
The content of the invention
Present invention is primarily aimed at solve the above problems and deficiency, there is provided a kind of tolerance overvoltage damage of circuit board
Experimental provision and experimental method, the quality of circuit board can be detected in the case of different temperatures, high electric field.
To achieve the above object, present invention firstly provides a kind of circuit board tolerance overvoltage damage experimental provision, its
Technical scheme is：
A kind of experimental provision of circuit board tolerance overvoltage damage, including test box, in addition to the test box can be made
System, control and the temperature control system for adjusting the test box internal temperature occur for the interior pulse voltage in varying strength electric field
System, the support and data handling system for placing circuit board under test.
Further, the temperature control system includes being arranged on electric heater unit inside the test box, to described
Heater provide the dc source of voltage, the temperature sensor inside the test box and with the TEMP
Device, the humidity control system of dc source connection.
Further, the electric heater unit includes two or more electric heaters, is disposed longitudinally on the test box
At the internal close support.
Further, it is provided with heat-insulating material between the test chamber interior wall and outer wall.
Invention further provides a kind of experimental method of circuit board tolerance overvoltage damage, using following technical side
Case：
A kind of experimental method of circuit board tolerance overvoltage damage, using experimental provision as previously described, test process
Comprise the following steps,
S1, connects dc source, and electric heater unit starts to heat to inside test box；
S2, different control temperature T is preset to humidity control system, the heating-up temperature of electric heater unit is maintained accordingly
Default control temperature levels；
S3, when circuit board temperature reaches default control temperature T and constant temperature, make pulse electric voltage generating system, make
Circuit board is under overvoltage environment；
S4, pass through the discharge capacity of data handling system reading circuit plate；
S5, withstanding voltage under different temperatures environment is calculated by the discharge capacity of acquisition, and evaluate the tolerance grade of circuit board.
Further, withstanding voltage is calculated by equation below,
Wherein, the circuit board discharge capacity that U is chosen as and is surveyed to detect by voltage, Q, T are the default control of humidity control system
Temperature processed, U are set to pulse voltage value, and T and U set variable.
Further, when withstanding voltage is more than 300, tolerance grade is height, and withstanding voltage is less than or equal to 300 and is more than
When 100, during tolerance grade is, when withstanding voltage is less than waiting 100, tolerance grade is low.
Further, under overvoltage environment, discharge capacity is collected using UHF-antenna, and amplified filter circuit filters out
Data collecting system is transmitted further to after interference signal
Further, the real time temperature signal of the detection of the humidity control system detection temperature sensor, it is and default
Temperature T compares, and according to comparative result adjust dc source power output, and then adjust electric heater unit heating-up temperature and
Temperature in whole test box.
Further, before test starts, humidity control system is preset in the temperature value of circuit board conventional working environment, arteries and veins
It is overvoltage to rush voltage, tests and the withstanding voltage of circuit board is calculated, and hereafter, is adjusted with temperature regulating on fixed temperature interval
The preset temperature T of section system, detection collection is carried out to discharge capacity caused by circuit dash-board injury to overvoltage under different temperatures, calculated
The withstanding voltage grade of evaluation circuit board；Then keeping temperature is constant, changes the pulse voltage that system occurs for pulse voltage, repeatedly
Aforementioned process is repeated, peak is reached to preset temperature, pulse voltage reaches peak, and electricity under different operating modes is assessed by calculating
The withstanding voltage of road plate and corresponding credit rating.
In summary, the experimental provision and experimental method of a kind of circuit board withstanding voltage damage provided by the invention, with showing
There is technology to compare, have the following advantages that：
1. electric heater unit, the actual working environment temperature of the more accurate analog circuit board of energy are installed in box house；
2. mounting temperature sensor, test data is back to humidity control system, to reach real to electric heater unit temperature
When the purpose that monitors, the operating mode under varying environment temperature conditionss is simulated by environment temperature in humidity control system regulating box,
And grade assessment can be carried out to withstanding voltage；
3. body structure is simple, temperature, pulse voltage can be adjusted, and be adjustable into different operating modes, and circuit board is carried out
Test under different operating modes, meanwhile, the circuit board of various different purposes is suitable for, it is applied widely.
Brief description of the drawings：
Fig. 1：A kind of experimental provision schematic diagram of circuit board withstanding voltage damage of the present invention；
Fig. 2：Test box structural representation in a kind of experimental provision of circuit board withstanding voltage damage of the present invention；
Wherein：System 1, dc source 2, humidity control system 3 occur for pulse voltage, amplify filter circuit 4, data acquisition
System 5, direct current supply line 6, insulating support plate 7, pallet stand 8, outer wall 9, electric heater unit 10, temperature sensor 11, circuit board
12, test box 13, storage, display analysis system 14, UHF-antenna 15, heat-insulating material 16, electrically heated rod 17, inwall 18
Embodiment
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings.
The invention provides a kind of experimental provision of circuit board tolerance overvoltage damage, including test box 13, in addition to
It can make system 1 occurs in the pulse voltage of varying strength electric field in test box 13, control and adjust the internal temperature of test box 13
Temperature control system, the support and data handling system for placing circuit board under test.
As depicted in figs. 1 and 2, test box 13 is sealing structure, including six side walls being interconnected and fixed, the He of inwall 18
The polyurethane foam plastics of heat-insulating material 16 is filled between outer wall 9, prevents the inside of test box 13 from carrying out heat exchange with extraneous, keeps
The temperature inside the box, the support that can place circuit board under test 12 (rear to be referred to as circuit board 12), branch are fixed with the bottom wall of box house
Frame includes pallet stand 8 and insulating support plate 7, and the bottom of pallet stand 8 and the bottom wall of test box 13 are fixed, top and insulating support plate 7
Fixed, circuit board 12 is placed on insulating support plate and tested, meanwhile, on insulation tray upper surface, be further fixed on one or
Multiple temperature sensors 11 are to the temperature around aware circuit plate.As shown in Fig. 2 pallet stand 7 is cuboid, bottom is fixed
On bottom wall, top at the bottom centre of insulating support plate 6 with fixing.
In embodiment provided by the invention, test box 13 is the cube structure that the length of side is 1500mm, the thickness of inwall 18
For 3mm, heat-insulating material 16 is filled between outer wall 9 and inwall 18, such as polyurethane foam plastics, electric heater unit 10 it is a diameter of
50mm, a height of 1394mm, the about 200mm of distance test chamber interior wall 18；The bottom centre of test box 13 is fixed with length and width and is
50mm, high 750mm pallet stand 8, insulating support plate 7 are fixed on pallet stand 8, and the length and width of insulating support plate 7 is 200mm, thickness
Spend for 10mm.The experimental provision tested above for the circuit board supporting suitable for vehicle-mounted broadcasting circuit provided by the invention
, in actual applications, can be according to the specific size of circuit board under test, the overall dimension of corresponding regulation experiment device.
As shown in figure 1, system 1, which occurs, for pulse voltage produces high voltage, pass through wire and the electricity being placed on insulating support plate 7
Road plate 12 is connected, and circuit board 12 is under overvoltage environment, and electrion test is carried out to circuit board 12.
For the condition of high temperature of analog circuit board 12 in use, test box 13 is set to simulate different environment temperature
Degree, experimental provision are additionally provided with adjustable and control test box internal temperature temperature control system, including electric heater unit 10,
Temperature sensor 11 and humidity control system 3, as shown in figure 1, in embodiment provided by the invention, electric heater unit 10 includes
Two or more electric heaters, such as the electrically heated rod 17 of electric heating tube in drier silk, it is disposed longitudinally on inside test box 13, can passes through
The inside of test box 13, top and the roof of test box 13 offset, and bottom and the bottom wall of test box 13 offset, internal electrical heating
Silk is connected with dc source 2, is powered by dc source 2 for electrical heating wire, is made its heating, heated for box house.Utilize resistance to height
Temperature sensor 11 is fixed on insulating support plate 7 by warm adhesive tape, the heating-up temperature around accurate aware circuit plate 12, avoids detecting
Temperature signal distortion, or internal temperature are unbalanced, and temperature sensor 11 can be multiple, and position equilibrium is arranged on circuit board 12
Periphery, and balancing, being horizontal positioned for circuit board 12 is not influenceed.Dc source 2 is supplied by direct current supply line 6 to electric heater unit 10
Electricity, electric heater unit 10 is worked, the temperature of test box 13 is increased to predetermined temperature, 11 collecting circuit board of temperature sensor 12 weeks
The temperature signal enclosed, and pass humidity control system 3 back, humidity control system 3 is by controlling the Power Control electricity of dc source 2 to add
The heating power of thermal, and then the temperature near control board 12.In embodiment provided by the invention, electric heater unit
10 is can be the heating tube of electric heating tube in drier silk, and heating tube is used to support electrical heating wire, and further speeds up radiating, practical application
In, it also can use other any achievable electrically heated devices, such as heat tape.
Pulse voltage occurs system 1 and is connected with circuit board 12, for sending pulse voltage, produces high voltage, produces different
The electric field of intensity, electrion test is carried out to circuit board 12.By caused discharge signal on circuit board 12 it is logical amplify filtering
Loop 4 carries out signal preliminary treatment, then collects discharge capacity information by data handling system, and carry out Data Analysis Services.
Data handling system includes data collecting system 5, storage, display analysis system 14, and data collecting system 5 will gather
Pulse voltage signal, rf power signal, temperature signal, discharge capacity information transfer to it is described storage, display analysis system 14
Data Analysis Services are carried out, and are shown.In embodiment provided by the invention, too high pressure can be gathered by UHF-antenna 15
The discharge capacity information of circuit board 12, UHF-antenna 15 are connected by wire with amplification filter circuit 4, and amplification filter circuit 4 is filtered
Except data collecting system 5 is transmitted further to after interference signal, storage, display analysis system 14 are connected with data collecting system 5, received
The data of data collecting system 5 simultaneously handle accordingly.
Invention also provides a kind of experimental method of circuit board tolerance overvoltage damage, comprise the following steps：
S1, connects dc source, and electric heater unit starts to heat to inside test box；
S2, different control temperature T is preset to humidity control system, the heating-up temperature of electric heater unit is maintained accordingly
Default control temperature levels；
S3, when circuit board temperature reaches default control temperature T and constant temperature, pulse voltage U is setIf, make pulse
Electric voltage generating system, circuit board is set to be under overvoltage environment；
S4, pass through the discharge capacity Q of data handling system reading circuit plateSurvey；
S5, the discharge capacity of acquisition is calculated into withstanding voltage U under different temperatures environment by equation belowComment, and evaluate circuit
The tolerance grade of plate.
Wherein, UCommentFor withstanding voltage, QSurveyFor the circuit board discharge capacity detected, T is the default control of humidity control system
Temperature, UIfFor pulse voltage value, T and UIfIt is variable.
By taking the circuit board used in vehicle-mounted broadcasting circuit or video display circuit as an example, when carrying out above-mentioned test, the data of collection
The withstanding voltage U being calculated by above-mentioned formulaComment, when withstanding voltage is more than 300, tolerance grade is height, and withstanding voltage is small
In or equal to 300 and during more than 100, tolerance grade is, when withstanding voltage is less than or equal to 100, tolerance grade is low.In reality
In, purposes and the similar circuit board of use environment, above-mentioned data area can be used be resistant to the classification of grade, or only
With reference to above-mentioned data carry out be resistant to grade classification, or can by using previously described test device and method of testing,
The quality condition of test result and corresponding circuit board is summarized accordingly, determined by substantial amounts of experimental data different
It is resistant to withstanding voltage situation corresponding to grade.
The real time temperature signal of the detection of humidity control system detection temperature sensor, compared with default temperature T, and root
According to the power output of comparative result adjustment dc source, and then in the heating-up temperature of adjustment electric heater unit and whole test box
Temperature.
Before test starts, humidity control system is preset in the temperature value of circuit board conventional working environment, such as 25 DEG C, connected
After dc source, temperature around circuit board 12 you it is constant when, make pulse electric voltage generating system, pulse voltage was electricity
Pressure, such as UIfFor 200V, circuit board 12 is under overvoltage environment, discharge capacity is collected using UHF-antenna 15, then will ginseng
Number substitutes into above-mentioned withstanding voltage assessment formula and the withstanding voltage of circuit board is calculated, and then draw the withstanding voltage of circuit board etc.
Level.Hereafter, change the preset temperature T of humidity control system 3, preset temperature T is raised with fixed temperature interval, as original
25 DEG C be 30 DEG C, 35 DEG C, 40 DEG C, every time increase by 5 DEG C until 100 DEG C (the normal working environment of circuit board typically not achieves
More than 100 DEG C), detection collection is carried out to discharge capacity caused by circuit dash-board injury to overvoltage under different temperatures, similarly calculates and comments
Estimate the withstanding voltage grade of circuit board, in the process, pulse voltage keeps constant；Then keeping temperature is constant, changes pulse
The pulse voltage of electric voltage generating system, is iteratively repeated aforementioned process, reaches peak to preset temperature, pulse voltage reaches highest
Value, the withstanding voltage of circuit board and corresponding credit rating under different operating modes are assessed by calculating.
In summary, the experimental provision and experimental method of a kind of circuit board withstanding voltage damage provided by the invention, with showing
There is technology to compare, have the following advantages that：
1. electric heater unit, the actual working environment temperature of the more accurate analog circuit board of energy are installed in box house；
2. mounting temperature sensor, test data is back to humidity control system, to reach real to electric heater unit temperature
When the purpose that monitors, the operating mode under varying environment temperature conditionss is simulated by environment temperature in humidity control system regulating box,
And grade assessment can be carried out to withstanding voltage；
3. body structure is simple, temperature, pulse voltage can be adjusted, and be adjustable into different operating modes, and circuit board is carried out
Test under different operating modes, meanwhile, the circuit board of various different purposes is suitable for, it is applied widely.
As described above, combining given plan content, similar technical scheme can be derived.In every case it is without departing from this
The content of inventive technique scheme, any simple modification made according to technical spirit of the invention to above example, equally become
Change and modification, in the range of still falling within technical solution of the present invention.
Claims (10)
1. a kind of experimental provision of circuit board tolerance overvoltage damage, including test box, it is characterised in that：Also include with institute can be made
State in test box and system, control and the temperature for adjusting the test box internal temperature occurs in the pulse voltage of varying strength electric field
Control system, the support and data handling system for placing circuit board under test.
A kind of 2. experimental provision of circuit board tolerance overvoltage damage as claimed in claim 1, it is characterised in that：The temperature
Control system includes being arranged on the electric heater unit inside the test box, the direct current to heater offer voltage
Source, the temperature sensor inside the test box and the temperature tune being connected with the temperature sensor, dc source
Section system.
A kind of 3. experimental provision of circuit board tolerance overvoltage damage as claimed in claim 2, it is characterised in that：The electricity adds
Thermal includes two or more electric heaters, is disposed longitudinally on inside the test box at the support.
4. a kind of experimental provision of circuit board tolerance overvoltage damage as described in any one of claims 1 to 3, its feature exist
In：Heat-insulating material is provided between the test chamber interior wall and outer wall.
A kind of 5. experimental method of circuit board tolerance overvoltage damage, it is characterised in that：Using such as any one of Claims 1-4
Described experimental provision, it is characterised in that：Test process comprises the following steps,
S1, connects dc source, and electric heater unit starts to heat to inside test box；
S2, different control temperature T is preset to humidity control system, the heating-up temperature of electric heater unit is maintained accordingly in advance
If control temperature levels；
S3, when circuit board temperature reaches default control temperature T and constant temperature, make pulse electric voltage generating system, make circuit
Plate is under overvoltage environment；
S4, pass through the discharge capacity of data handling system reading circuit plate；
S5, withstanding voltage under different temperatures environment is calculated by the discharge capacity of acquisition, and evaluate the tolerance grade of circuit board.
A kind of 6. experimental method of circuit board tolerance overvoltage damage as claimed in claim 5, it is characterised in that：By as follows
Formula calculates withstanding voltage,
Wherein, UCommentFor and by voltage, QSurveyFor the circuit board discharge capacity detected, T is the default control temperature of humidity control system,
UIfFor pulse voltage value, T and UIfIt is variable.
A kind of 7. experimental method of circuit board tolerance overvoltage damage as claimed in claim 5, it is characterised in that：When tolerance electricity
When pressure is more than 300, tolerance grade is height, when withstanding voltage is less than or equal to 300 and is more than 100, during tolerance grade is, and tolerance electricity
When pressure is less than or equal to 100, tolerance grade is low.
A kind of 8. experimental method of circuit board tolerance overvoltage damage as claimed in claim 5, it is characterised in that：In overvoltage
Under environment, discharge capacity is collected using UHF-antenna, and be transmitted further to data after amplified filter circuit filtering interference signals and adopt
Collecting system.
A kind of 9. experimental method of circuit board tolerance overvoltage damage as claimed in claim 5, it is characterised in that：The temperature
The real time temperature signal of the detection of regulating system detection temperature sensor, compared with default temperature T, and adjusted according to comparative result
The power output of whole dc source, and then the temperature in the heating-up temperature of adjustment electric heater unit and whole test box.
10. a kind of experimental method of circuit board tolerance overvoltage damage as described in any one of claim 5 to 9, its feature exist
In：Before test starts, humidity control system is preset in the temperature value of circuit board conventional working environment, pulse voltage was electricity
Pressure, tests and the withstanding voltage of circuit board is calculated, and hereafter, the default of humidity control system is raised with fixed temperature interval
Temperature T, detection collection is carried out to discharge capacity caused by circuit dash-board injury to overvoltage under different temperatures, calculates evaluation circuit board
Withstanding voltage grade；Then keeping temperature is constant, changes the pulse voltage that system occurs for pulse voltage, is iteratively repeated foregoing mistake
Journey, peak is reached to preset temperature, pulse voltage reaches peak, and the tolerance of circuit board under different operating modes is assessed by calculating
Voltage and corresponding credit rating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710948608.0A CN107884701B (en) | 2017-10-12 | 2017-10-12 | Experimental device and experimental method for circuit board to withstand overvoltage damage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710948608.0A CN107884701B (en) | 2017-10-12 | 2017-10-12 | Experimental device and experimental method for circuit board to withstand overvoltage damage |
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| CN107884701B CN107884701B (en) | 2020-06-16 |
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Cited By (2)
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|---|---|---|---|---|
| CN109451132A (en) * | 2018-12-27 | 2019-03-08 | 上海乐今通信技术有限公司 | A kind of the heat resistance test macro and heat resistance test method of mobile terminal |
| CN113109008A (en) * | 2021-03-25 | 2021-07-13 | 芜湖雅葆轩电子科技股份有限公司 | Tolerance detection method for finished circuit board |
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| 徐洪英 等: "重复脉冲电压下温度对变频电机绝缘局部放电统计特性影响研究", 《绝缘材料》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109451132A (en) * | 2018-12-27 | 2019-03-08 | 上海乐今通信技术有限公司 | A kind of the heat resistance test macro and heat resistance test method of mobile terminal |
| CN113109008A (en) * | 2021-03-25 | 2021-07-13 | 芜湖雅葆轩电子科技股份有限公司 | Tolerance detection method for finished circuit board |
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