CN101344562A - Test method and device for circuit printing plate component - Google Patents
Test method and device for circuit printing plate component Download PDFInfo
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- CN101344562A CN101344562A CNA2008101467063A CN200810146706A CN101344562A CN 101344562 A CN101344562 A CN 101344562A CN A2008101467063 A CNA2008101467063 A CN A2008101467063A CN 200810146706 A CN200810146706 A CN 200810146706A CN 101344562 A CN101344562 A CN 101344562A
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Abstract
The invention discloses a test method and a test apparatus used for testing printed circuit board components, including the following steps: a test judging module acquires an operation result of a module on the printed circuit board components to be tested and then comparison and judgment are carried out to the acquired operation result with a preset index; if the operation result meets the index, the tested module can pass the test; if not, the tested module cannot pass the test; the test judging module adopts a result display module to display the compared and judged result. The proposal of the invention enhances the test efficiency and test accuracy.
Description
Technical field
The present invention relates to measuring technology, relate in particular to the method for testing and the testing apparatus of circuit printing plate component.
Background technology
Printed circuit board (PCB, Printed Circuit Board) is with software design and through the plank after the processing.Plank behind installation elements on the PCB is called circuit printing plate component (PCBA, PrintedCircuit Board Assembly), is the plank that can realize certain or a plurality of functions, is also referred to as half-finished product plate.
Along with the development of technology, density and the complicacy of PCBA are more and more higher, after the welding of having finished PCBA, before the assembling finished product, need PCBA is tested producing on the line, normal with the function of each functional module of guaranteeing PCBA, the end properties that final assembling is finished is good.
At present, the method of testing of PCBA is: PCBA is powered on, the artificial devices such as multimeter, oscillograph that use are tested the magnitude of voltage or the current value of the test point on the PCBA, and read-out voltage value or current value judge then whether magnitude of voltage or current value meet design requirement.Whether this method can only be measured the magnitude of voltage or the current value of each test point, good with the electric property of determining PCBA, but can not guarantee otherwise function of PCBA and performance, and each measuring process all needs manually-operated, and efficient is low.
In order all to test to each function of PCBA, the test mode of existing another kind of PCBA is: PCBA is placed on the testing jig of making in advance, the peripherals of each function of test PCBA is installed on the testing jig in advance, for example, the peripherals that audio-frequency test needs comprises playing device, and this playing device can be loudspeaker.Be example so that the audio-frequency module on the PCBA is tested below, this method is illustrated, during test, import the file of a section audio form to audio-frequency module, play by playing device behind the file of audio-frequency module operation audio format by the CPU on the PCBA, the quality of the sound that the tester spreads out of according to playing device, judge whether audio-frequency module meets design requirement, if satisfy, then test is passed through, otherwise test is not passed through.Adopt this method to test, after obtaining the operation result of module to be tested, need artificially to judge whether this operation result satisfies design objective, cause the result who judges objective inadequately, test accuracy is not high, and, each run result's relatively judgement all needs artificial participation, testing efficiency is low, when needs treat test module repeatedly operation result is judged comparison the time, the not high defective of testing efficiency is just more obvious.
Summary of the invention
The invention provides the method for testing of a kind of PCBA, this method can improve testing efficiency and test accuracy.
The invention provides the testing apparatus of a kind of PCBA, this testing apparatus can improve testing efficiency and test accuracy.
The method of testing of a kind of PCBA, this method comprises:
The test judge module obtains the operation result that PCBA goes up module to be tested;
The test judge module compares judgement with operation result and predefined index, if operation result satisfies index, then test is passed through, otherwise test is not passed through;
The result that the test judge module is relatively judged by display module demonstration as a result.
The testing apparatus of a kind of PCBA, this testing apparatus comprise test judge module and display module as a result;
Described test judge module is used to obtain the operation result that PCBA goes up module to be tested, and operation result and predefined index are compared judgement, if operation result satisfies index, then test is passed through, and do not pass through otherwise test, and the result that will relatively judge sends display module as a result to;
Described display module as a result is used to show the result who relatively judges.
From such scheme as can be seen, among the present invention, the test judge module obtains the operation result of module to be tested, and operation result and predefined index are compared judgement, if operation result satisfies index, then test is passed through, otherwise test is not passed through; At last, the test judge module is exported the result who relatively judges.Like this, finished test process, need not after obtaining the operation result of module to be tested artificially to judge whether it satisfies index by the test judge module, thereby, not only improved testing efficiency, also improved test accuracy.
Description of drawings
Fig. 1 is the method for testing exemplary process diagram of PCBA of the present invention;
Fig. 2 is the testing apparatus structural representation of PCBA of the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, the present invention is described in more detail.
The present invention finishes test process by the test judge module that is provided with, preestablished the index that corresponding PCBA goes up each module to be tested in the test judge module, when testing, the test judge module compares judgement with the operation result and the predefined index of module to be tested, the result's output that will relatively judge then.Like this, need not after obtaining the operation result of module to be tested artificially to judge that whether it satisfies index, has improved test accuracy and testing efficiency.
Referring to Fig. 1, be the method for testing exemplary process diagram of PCBA of the present invention, this method may further comprise the steps:
Before the test, PCBA is placed on the testing jig of making in advance, the peripherals of each function of test PCBA is installed on the testing jig in advance, the peripherals of each function is used for assisting the test judge module to finish test operation.For example, peripherals comprises the test judge module compared the display module as a result that the result of judgement shows, this as a result display module can realize by display screen.For another example, for audio-frequency test, the peripherals that needs comprises audio test device, and this device is used for receiving the simulating signal that audio-frequency module transmits under the control of test judge module, carry out Treatment Analysis and go out spectral characteristic, the spectral characteristic that analyzes is transferred to the test judge module.For another example, the peripherals that battery or test point are carried out electric performance test and needed is the electric performance test device, is used under the control of test judge module test point being tested, and obtains the magnitude of voltage or the current value of test point, sends the test judge module to.To do more specifically explanation about the detailed process back that audio-frequency module, battery or test point are tested.
When testing, PCBA on the testing jig and peripherals are powered on, after the module operation to be tested, the test judge module obtains the operation result of module to be tested.
When discontented toe timestamp, the test judge module can also send warning simultaneously.
For different modules to be tested, the test judge module will carry out different operations, be illustrated below.
If module to be tested is a battery, need the electric performance test device to assist to finish test process, the electric performance test device is connected on the battery, when testing, the electric performance test device is tested battery under the control of test judge module, obtain the magnitude of voltage of module to be tested, send the test judge module to; The test judge module compares magnitude of voltage and the predefined magnitude of voltage index that the electric performance test device transmits, if satisfy predefined magnitude of voltage index, then test is passed through, if do not satisfy predefined magnitude of voltage index, then test is not passed through.Described magnitude of voltage index is set according to actual conditions, for example, can be higher than certain concrete data for the magnitude of voltage that requires to obtain.Described electric performance test device can be realized by an AD conversion equipment, particularly, AD is changed transposition to link to each other with battery, during test, battery sends the simulating signal of voltage to the electric performance test device, the electric performance test device is converted to the digital signal of voltage with this module by signal, sends the test judge module to.
If module to be tested is the test point of electric property to be tested, also need the electric performance test device to assist to finish test process, the electric performance test device is connected on the test point, when testing, the electric performance test device is tested test point under the control of test judge module, obtain the magnitude of voltage or the current value of test point, send the test judge module to; The test judge module compares the magnitude of voltage of electric performance test device transmission and the index of predefined magnitude of voltage, perhaps, the test judge module compares the current value of electric performance test device transmission and the index of predefined current value, if satisfy predefined index, then test is passed through, if do not satisfy predefined index, then test is not passed through.Described index is set according to actual conditions, for example, can be that the magnitude of voltage that requirement records is higher than certain concrete data, and the current value that perhaps requires to record is higher than certain concrete numerical value.Realize described electric performance test device if adopt the AD conversion equipment, during test, AD is changed transposition to link to each other with test point, test point sends the simulating signal of voltage or electric current to the electric performance test device, the electric performance test device is the digital signal of voltage or electric current with analog signal conversion, sends the test judge module to.
If module to be tested is internal memory or memory device, when testing, the test judge module writes one piece of data to module to be measured, reads the data that write, and the data of reading are described operation result; The test judge module compares data of reading and the data that write before, obtains error rate, and this error rate and predefined error rate index are compared.The data of write memory can be one section binary data, also can be file datas.What write memory module can be file data, for example the TXT file data.
If module to be tested is the GPS module, during test, the test judge module sends enabled instruction to the GPS module, the GPS module receives enabled instruction, begins the current location of GPS module is positioned, if calculate current location, promptly finish the location, then operation result is fed back to the test judge module, described operation result comprises positioning time at least, and be that GPS begins to position the time of location between finishing described positioning time; The test judge module compares judgement with operation result and predefined index, if operation result satisfies index, then test is passed through, otherwise test is not passed through.
If predefined index includes only the index about positioning time, after then testing judge module and receiving the positioning time of GPS feedback, with this positioning time of receiving be redefined for the index of positioning time and compare, if satisfy index, then test is passed through, otherwise test is not passed through.Positioning time is short more good more, and therefore, the described index that is set at positioning time can be: be worth less than certain positioning time, and then test is passed through, otherwise test is not passed through.
Alternatively, described predefined index is except comprising positioning time, the intensity that can also comprise satellite-signal, the intensity of described satellite-signal is the intensity of the satellite-signal that the GPS module receives in positioning time, and correspondingly, the GPS module sends the intensity that also comprises satellite-signal in the operation result of testing judge module to, the intensity of the satellite-signal that will be transmitted by the GPS module and the intensity of predefined satellite-signal compare, if satisfy index, then test is passed through, otherwise test is not passed through.
Alternatively, described predefined index is except comprising positioning time, can also comprise a satellite number, a described satellite number is a number that sends the satellite of signal in positioning time to the GPS module, and correspondingly, the GPS module sends in the operation result of testing judge module and also comprises a satellite number, to compare by a satellite number and the predefined satellite number that the GPS module transmits, if satisfy index, then test is passed through, otherwise test is not passed through.
Certainly, the intensity and a satellite number that can also comprise positioning time, satellite-signal in the predefined index simultaneously, at this moment, after the positioning time that the GPS module that receives the test judge module transmits, the intensity and a satellite number of satellite-signal, when judging this three and all satisfy index, test is passed through, otherwise test is not passed through.The intensity of satellite-signal is strong more good more in positioning time, therefore, intensity index about satellite-signal can be set at: then test and pass through if the intensity of satellite-signal satisfies certain numerical range, for example, the intensity of satellite-signal is passed through for test more than or equal to 36db.In positioning time, a number that sends the satellite of signal need satisfy certain number, can be set at different values as required, for example, can be set at more than or equal to 3.
If module to be tested is an audio-frequency module, need audio test device to assist to finish test process, when testing, the test judge module is with the file input audio-frequency module of a section audio form, the output simulating signal is given audio test device behind the file of audio-frequency module operation audio format, audio test device is handled the simulating signal that receives, and analyzes spectral characteristic, and the acoustic characteristic that analyzes is described operation result; The spectral characteristic that the test judge module will obtain the file analysis of audio format of input audio-frequency module compares with spectral characteristic by the input of audio-frequency test module, obtains error rate, and this error rate and predefined index are compared.Described predefined index is set as required, for example can pass through for test less than 2% for: error rate.Described audio test device is handled the simulating signal that receives, analyze spectral characteristic, can specifically comprise: the audio-frequency test module is a digital signal with the analog signal conversion of audio-frequency module input, after this digital signal carried out sampling processing, the signal that sampling processing is obtained carries out spectrum analysis, obtains spectral characteristic.
Further, more accurate in order to make test, can also adopt the method for repeatedly measuring the acquisition statistics to test.At this moment, be provided with the set point number of relatively judging in the test judge module, comprise between step 102 and the step 103: the test judge module is judged relatively judging number of times, if judge that relatively number of times reaches set point number, then execution in step 103, and the result that each time before relatively judged displays by display module as a result; Do not reach set point number if relatively judge number of times, then execution in step 101, proceed to test next time.
Among the present invention, the test process that the test judge module is finished can call test procedure and realize by the CPU on the PCBA, and this test procedure is finished the pairing program of testing procedure for the test judge module.For this situation, memory storage can be installed on testing jig, this memory storage can be the SD card, stores test procedure.When testing, PCBA, peripherals and memory storage are powered on, the CPU on the PCBA calls the test procedure on the memory storage, carries out this test procedure, just can test the comparison judged result of output test at last automatically.Certainly, this test procedure also can offer CPU by other modes, and the test judge module also can be independent of CPU.
Referring to Fig. 2, be the testing apparatus structural representation of PCBA of the present invention, this testing apparatus comprises test judge module and display module as a result;
Described test judge module is used to obtain the operation result that PCBA goes up module to be tested, and operation result and predefined index are compared judgement, if operation result satisfies index, then test is passed through, and do not pass through otherwise test, and the result that will relatively judge sends display module as a result to;
Described display module as a result is used to show the result who relatively judges.
Alternatively, described module to be tested is a battery, and described test judge module comprises battery testing judgement submodule and electric performance test device;
Described electric performance test device is used under the control of battery testing judgement submodule battery being tested, and obtains the magnitude of voltage of battery, sends battery testing to and judges submodule;
Described battery testing is judged submodule, is used for magnitude of voltage that the electric performance test device is transmitted and compares with predefined magnitude of voltage index, if operation result satisfies index, then test is passed through, otherwise test is not passed through; And the result that will relatively judge sends display module as a result to.
Alternatively, described module to be tested is the test point of electric property to be tested, and described test judge module comprises electric performance test judgement submodule and electric performance test device;
Described electric performance test device, the test point that is used for treating the detecting electric performance under electric performance test is judged the control of submodule is tested, obtain the magnitude of voltage or the current value of the test point of electric property to be tested, send electric performance test to and judge submodule;
Described electric performance test is judged submodule, be used for the magnitude of voltage of electric performance test device transmission and the index of predefined magnitude of voltage are compared, perhaps the current value that the electric performance test device is transmitted and the index of predefined current value compare, if operation result satisfies index, then test is passed through, otherwise test is not passed through; And the result that will relatively judge sends display module as a result to.
Described electric performance test device can be a device, also can be two devices independently, is connected with battery with the test point of electric property to be tested respectively.
Alternatively, described module to be tested is internal memory or memory device, and described test judge module comprises memory property test judgement submodule;
Submodule is judged in described memory property test, be used for writing one piece of data to module to be measured, read the data that write, the data of reading are described operation result, and data of reading and the data that write are before compared, and obtain error rate, this error rate and predefined error rate index are compared, if operation result satisfies index, then test is passed through, otherwise test is not passed through; And the result that will relatively judge sends display module as a result to.
Alternatively, described module to be tested is the GPS module, and described test judge module comprises GPS test judgement submodule;
Submodule is judged in described GPS test, be used for sending enabled instruction to the GPS module, the operation result that reception transmits after being finished by GPS module location, described operation result comprises positioning time, operation result and predefined index are compared judgement, if operation result satisfies index, then test is passed through, otherwise test is not passed through; And the result that will relatively judge sends display module as a result to.
Alternatively, described operation result not only comprises positioning time, also comprise satellite-signal intensity, comprise a satellite number or comprise the intensity and a satellite number of satellite-signal.
Alternatively, described module to be tested is an audio-frequency module, and described test judge module comprises audio-frequency test judgement submodule and audio test device;
Described audio-frequency test is judged submodule, is used for the file input audio-frequency module with a section audio form; The spectral characteristic that the file analysis of audio format of input audio-frequency module is obtained, compare with the spectral characteristic that transmits by the audio-frequency test module, obtain error rate, this error rate and predefined index are compared, if operation result satisfies index, then test is passed through, otherwise test is not passed through; And the result that will relatively judge sends display module as a result to;
The output simulating signal is given audio test device behind the file of described audio-frequency module operation audio format;
Described audio test device is used for the simulating signal that receives is handled, and analyzes spectral characteristic, sends audio-frequency test to and judges submodule.
The test judge module comprises that battery testing judges that submodule, electric performance test judge that submodule, memory property test judge that submodule, GPS test judge that submodule and audio-frequency test judge any one or the combination in any in the submodule; Certainly, the structure that comprises in the test judge module is not limited only to this, go up the difference of the module to be tested that needs test according to different PCBA structures and PCBA, correspondingly test and comprise also in the judge module that other different tests judge submodule, in order to finish the test of this PCBA being gone up module to be tested.
Above-described specific embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above only is specific embodiments of the invention; and be not intended to limit the scope of the invention; within the spirit and principles in the present invention all, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (15)
1, the method for testing of a kind of circuit printing plate component PCBA is characterized in that, this method comprises:
The test judge module obtains the operation result that PCBA goes up module to be tested;
The test judge module compares judgement with operation result and predefined index, if operation result satisfies index, then test is passed through, otherwise test is not passed through;
The result that the test judge module is relatively judged by display module demonstration as a result.
2, the method for claim 1 is characterized in that, described module to be tested is a battery, and the operation result that described test judge module obtains module to be tested is:
The electric performance test device is tested battery under the control of test judge module, obtains the magnitude of voltage of module to be tested, sends the test judge module to;
Described test judge module with operation result and predefined index compare for: the test judge module compares magnitude of voltage and the predefined magnitude of voltage index that the electric performance test device transmits.
3, the method for claim 1 is characterized in that, described module to be tested is the test point of electric property to be tested, and the operation result that described test judge module obtains module to be tested is:
The electric performance test device is tested test point under the control of test judge module, obtains the magnitude of voltage or the current value of test point, sends the test judge module to;
Operation result and predefined index are compared the magnitude of voltage that the electric performance test device transmitted for: test judge module to described test judge module and the index of predefined magnitude of voltage compares, perhaps, the test judge module compares the current value of electric performance test device transmission and the index of predefined current value.
4, the method for claim 1 is characterized in that, when described module to be tested was internal memory or memory device, the operation result that described test judge module obtains module to be tested was:
The test judge module writes one piece of data to module to be measured, reads the data that write, and the data of reading are described operation result;
Described test judge module with operation result and predefined index compare for: the test judge module compares data of reading and the data that write before, obtains error rate, and this error rate and predefined error rate index are compared.
5, the method for claim 1 is characterized in that, when described module to be tested was the GPS module, the operation result that described test judge module obtains module to be tested was:
The test judge module sends enabled instruction to the GPS module, and the GPS module receives enabled instruction, begins the current location of GPS module is positioned, and sends operation result to the test judge module after finish the location, and described operation result comprises positioning time.
6, method as claimed in claim 5 is characterized in that, described operation result comprise satellite-signal intensity, comprise a satellite number or comprise the intensity and a satellite number of satellite-signal.
7, the method for claim 1 is characterized in that, described module to be tested is an audio-frequency module, and the operation result that described test judge module obtains module to be tested is:
The test judge module is with the file input audio-frequency module of a section audio form, the output simulating signal is given audio test device behind the file of audio-frequency module operation audio format, audio test device is handled the simulating signal that receives, analyze spectral characteristic, the acoustic characteristic that analyzes is described operation result;
Described test judge module with operation result and predefined index compare into:
The spectral characteristic that test module will be obtained by the file analysis of the audio format of importing audio-frequency module compares with the spectral characteristic of being imported by the audio-frequency test module, obtains error rate, and this error rate and predefined index are compared.
8, method as claimed in claim 7 is characterized in that, described audio test device is handled the simulating signal that receives, and analyzes spectral characteristic and comprises:
The audio-frequency test module is a digital signal with the analog signal conversion of audio-frequency module input, and this digital signal is carried out sampling processing, and the signal that sampling processing is obtained carries out spectrum analysis, obtains spectral characteristic.
As each described method in the claim 1 to 8, it is characterized in that 9, described test judge module compares operation result and predefined index after the judgement, before the result that described test judge module output is relatively judged, this method comprises:
The test judge module is judged relatively judging number of times, if judge that relatively number of times reaches set point number, then carries out described test judge module and passes through the relatively result's of judgement step of display module demonstration as a result; Otherwise, carry out the step that described test judge module obtains the operation result of module to be tested.
10, the testing apparatus of a kind of PCBA is characterized in that, this testing apparatus comprises test judge module and display module as a result;
Described test judge module is used to obtain the operation result that PCBA goes up module to be tested, and operation result and predefined index are compared judgement, if operation result satisfies index, then test is passed through, and do not pass through otherwise test, and the result that will relatively judge sends display module as a result to;
Described display module as a result is used to show the result who relatively judges.
11, testing apparatus as claimed in claim 10 is characterized in that, when described module to be tested was battery, described test judge module comprised battery testing judgement submodule and electric performance test device;
Described electric performance test device is used under the control of battery testing judgement submodule battery being tested, and obtains the magnitude of voltage of battery, sends battery testing to and judges submodule;
Described battery testing is judged submodule, is used for magnitude of voltage that the electric performance test device is transmitted and compares with predefined magnitude of voltage index, if operation result satisfies index, then test is passed through, otherwise test is not passed through; And the result that will relatively judge sends display module as a result to.
12, testing apparatus as claimed in claim 11 is characterized in that, when described module to be tested was the test point of electric property to be tested, described test judge module comprised electric performance test judgement submodule and electric performance test device;
Described electric performance test device is used under the control of electric performance test judgement submodule test point being tested, and obtains the magnitude of voltage or the current value of test point, sends electric performance test to and judges submodule;
Described electric performance test is judged submodule, be used for the magnitude of voltage of electric performance test device transmission and the index of predefined magnitude of voltage are compared, perhaps the current value that the electric performance test device is transmitted and the index of predefined current value compare, if operation result satisfies index, then test is passed through, otherwise test is not passed through; And the result that will relatively judge sends display module as a result to.
13, testing apparatus as claimed in claim 10 is characterized in that, when described module to be tested was internal memory or memory device, described test judge module comprised memory property test judgement submodule;
Submodule is judged in described memory property test, be used for writing one piece of data to module to be measured, read the data that write, the data of reading are described operation result, and data of reading and the data that write are before compared, and obtain error rate, this error rate and predefined error rate index are compared, if operation result satisfies index, then test is passed through, otherwise test is not passed through; And the result that will relatively judge sends display module as a result to.
14, testing apparatus as claimed in claim 10 is characterized in that, when described module to be tested was the GPS module, described test judge module comprised GPS test judgement submodule;
Submodule is judged in described GPS test, be used for sending enabled instruction to the GPS module, the operation result that reception transmits after being finished by GPS module location, described operation result comprises positioning time, operation result and predefined index are compared judgement, if operation result satisfies index, then test is passed through, otherwise test is not passed through; And the result that will relatively judge sends display module as a result to.
15, testing apparatus as claimed in claim 10 is characterized in that, when described module to be tested was audio-frequency module, described test judge module comprised audio-frequency test judgement submodule and audio test device;
Described audio-frequency test is judged submodule, is used for the file input audio-frequency module with a section audio form; The spectral characteristic that the file analysis of audio format of input audio-frequency module is obtained, compare with the spectral characteristic that transmits by the audio-frequency test module, obtain error rate, this error rate and predefined index are compared, if operation result satisfies index, then test is passed through, otherwise test is not passed through; And the result that will relatively judge sends display module as a result to;
The output simulating signal is given audio test device behind the file of described audio-frequency module operation audio format;
Described audio test device is used for the simulating signal that receives is handled, and analyzes spectral characteristic, sends audio-frequency test to and judges submodule.
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| CN103002317B (en) * | 2012-11-16 | 2015-04-15 | 福州德州电子科技有限公司 | Automatic PCBA (printed circuit board assembly) testing method and system for display device |
| CN103324571B (en) * | 2013-06-25 | 2016-02-17 | 福州瑞芯微电子股份有限公司 | A kind of method and system thereof of testing GPS module on embedded PCB A |
| CN103324571A (en) * | 2013-06-25 | 2013-09-25 | 福州瑞芯微电子有限公司 | Method and system for testing GPS (global position system) module on embedded PCBA (printed circuit board assembly) |
| CN104464266A (en) * | 2014-12-05 | 2015-03-25 | 深圳市创荣发电子有限公司 | Automatic main control panel testing system with remote controller |
| CN104464266B (en) * | 2014-12-05 | 2017-09-05 | 深圳市创荣发电子有限公司 | A kind of master control borad Auto-Test System with remote control |
| CN106850092A (en) * | 2016-12-12 | 2017-06-13 | 国网北京市电力公司 | Micro power radio communication unit electrical characteristic detection means and method |
| CN108181573A (en) * | 2017-12-29 | 2018-06-19 | 深圳怡化电脑股份有限公司 | The test device of PCBA |
| CN111413608A (en) * | 2020-04-22 | 2020-07-14 | 苏州市运泰利自动化设备有限公司 | PCBA test system and method |
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