CN114871118A - Item parameter display method for multiple visual inspection test equipment of PCBA (printed circuit board assembly) - Google Patents
Item parameter display method for multiple visual inspection test equipment of PCBA (printed circuit board assembly) Download PDFInfo
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- CN114871118A CN114871118A CN202210474329.6A CN202210474329A CN114871118A CN 114871118 A CN114871118 A CN 114871118A CN 202210474329 A CN202210474329 A CN 202210474329A CN 114871118 A CN114871118 A CN 114871118A
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- 238000012360 testing method Methods 0.000 title claims abstract description 99
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000011179 visual inspection Methods 0.000 title claims description 21
- 239000000758 substrate Substances 0.000 claims abstract description 11
- 230000000007 visual effect Effects 0.000 claims abstract description 5
- RVCKCEDKBVEEHL-UHFFFAOYSA-N 2,3,4,5,6-pentachlorobenzyl alcohol Chemical compound OCC1=C(Cl)C(Cl)=C(Cl)C(Cl)=C1Cl RVCKCEDKBVEEHL-UHFFFAOYSA-N 0.000 claims abstract 21
- 238000001514 detection method Methods 0.000 claims description 75
- 238000012423 maintenance Methods 0.000 claims description 38
- 230000002950 deficient Effects 0.000 claims description 23
- 238000012795 verification Methods 0.000 claims description 13
- 238000004364 calculation method Methods 0.000 claims description 9
- 230000002159 abnormal effect Effects 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 6
- 230000001186 cumulative effect Effects 0.000 claims description 5
- 238000004458 analytical method Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 239000000284 extract Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 239000003086 colorant Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/34—Sorting according to other particular properties
- B07C5/344—Sorting according to other particular properties according to electric or electromagnetic properties
Abstract
The invention relates to the technical field of PCBA board testing, in particular to a project parameter display method of a PCBA board multi-item visual testing device, which comprises a PCBA board multi-item testing module, an item selection module, a parameter acquisition MCU, a main control MCU and a multi-project parameter display unit; the multi-project parameter display unit is provided with a substrate, a display control circuit board fixed on the substrate, a three-primary-color backlight board fixed on the display control circuit board and an LCD screen fixed on the three-primary-color backlight board, wherein the display control circuit board is provided with a display chip electrically connected with the LCD screen and a three-primary-color control circuit electrically connected with the three-primary-color backlight board, and the LCD screen is provided with a test project display unit, a test result display unit, a total test display unit and a bad total display unit through the display chip; the system can more intuitively respond to testers, so that the working efficiency of the testers is greatly improved.
Description
Technical Field
The invention relates to the technical field of PCBA (printed circuit board assembly) board testing, in particular to a method for displaying item parameters of PCBA board multi-item visual testing equipment.
Background
With the development of multifunctional intelligent electronic products, more and more PCBA board test equipment is introduced in the production and processing process of the electronic products, and tests of various project conditions such as internal resistance, a buzzer, a Hall, direct current positive terminal Voltage (VDD), a load switch and the like are involved aiming at the test of the PCBA board; in order to improve the testing efficiency, some manufacturers integrate testing items into one device, and then comprehensively test the PCBA board through a control system, but the display mode of the multiple items of visual testing devices aiming at testing parameters is simple at present, statistics of the system is not introduced aiming at the testing of multiple items, and if the testing result only reflects two modes of good products and defective products, the defective products need to be tested again to determine which of the bad PCBA boards is tested badly; in addition, for the tests of various items, the display mode of the test result is often displayed by combining a display screen with an alarm lamp, the display effect cannot be more intuitively reflected to the testers, and the display effect has certain defects; in view of the above, it is necessary to provide a new technical solution to solve the above problems.
Disclosure of Invention
The present invention aims to overcome the above-mentioned shortcomings and provide a technical solution to solve the above-mentioned problems.
A project parameter display method of a PCBA board multi-item visual inspection test device comprises a PCBA board multi-item test module, a project selection module, a parameter acquisition MCU, a main control MCU and a multi-project parameter display unit; the multi-project parameter display unit is provided with a substrate, a display control circuit board fixed on the substrate, a three-primary-color backlight board fixed on the display control circuit board and an LCD screen fixed on the three-primary-color backlight board, wherein the display control circuit board is provided with a display chip electrically connected with the LCD screen and a three-primary-color control circuit electrically connected with the three-primary-color backlight board, and the LCD screen is provided with a test project display unit, a test result display unit, a total test display unit and a bad total display unit through the display chip;
the PCBA board multi-item visual inspection module sets corresponding test item information according to a PCBA board to be detected, sends the test item information to the main control MCU, the main control MCU sends the test item information to the display chip, and the display chip updates the test item display unit according to the test item information;
the main control MCU also sends the test item information to the parameter acquisition MCU, the parameter acquisition MCU controls the PCBA board multi-item test module according to the test item information, the circuit condition of the PCBA board to be detected is detected through the PCBA board multi-item visual inspection module, the detection data is obtained and sent to the main control MCU, the main control MCU analyzes and processes the detection data, the detection result data is sent to the display chip after the analysis and processing are finished, and the display chip updates the test result display unit, the total test number display unit and the bad total number display unit according to the detection result data;
the main control MCU controls the working state of the three-primary-color control circuit according to the detection result data, so that the three-primary-color backlight board reflects the detection condition of the PCBA board to be detected in a backlight mode.
Preferably, the parameter acquisition MCU sets a plurality of detection pins of different items according to the number of the detection items to be connected with the plurality of visual inspection modules, and sets detection data of different detection items according to potential signal change conditions sent by the plurality of visual inspection modules of the PCBA from different detection pins, wherein the detection data of each item comprises three detection data information of qualified, unqualified and abnormal.
Preferably, the main control MCU sets the verification data matched with the detection data according to the test item information set by the item selection module, and extracts the corresponding verification data according to the test item information set by the item selection module to perform the cumulative calculation, so as to obtain the verification result data.
Preferably, the main control MCU acquires the detection data of the parameter acquisition MCU, performs cumulative calculation on the acquired detection data, discriminates the result from the verification result data after calculation, and analyzes the detection result data.
Preferably, when the detection result data is abnormal, the drive parameter acquisition MCU detects the PCBA board to be detected again, obtains new data information and sends the new data information to the main control MCU for checking again.
Preferably, a plurality of interval values with different maintenance degrees are set according to the maintenance condition of the PCBA to be detected after becoming a defective product and the unqualified check data information of each item, the main control MCU acquires the detection data of the parameter acquisition MCU, analyzes the maintenance data through interval value identification, and sends the maintenance data to the multi-item parameter display unit.
Preferably, the LCD screen is further provided with a maintenance condition display unit through a display chip, the display chip updates the maintenance condition display unit according to the maintenance data, and the main control MCU controls the working state of the three-primary-color control circuit according to the maintenance data, so that the three-primary-color backlight plate reflects the maintenance condition of the PCBA to be detected in a backlight mode.
Preferably, eight-wire serial connection terminals are arranged on the display control circuit board, the master control MCU performs four-wire serial communication with the display chip through four wires of the eight-wire serial connection terminals, and the master control MCU drives the three-primary-color control circuit through the other four wires of the eight-wire serial connection terminals.
Preferably, a lifting cushion block is arranged on the base plate, and the display control circuit board is fixedly supported on the lifting cushion block, so that a space for accommodating the electronic element is formed between the base plate and the display control circuit board.
Preferably, the display chip is model GN 1621A.
Compared with the prior art, the invention has the beneficial effects that:
the method comprises the steps that a PCBA multi-project testing module, a project selection module, a parameter acquisition MCU, a main control MCU and a multi-project parameter display unit are arranged; the multi-project parameter display unit is provided with a substrate, a display control circuit board fixed on the substrate, a three-primary-color backlight board fixed on the display control circuit board and an LCD screen fixed on the three-primary-color backlight board, the LCD screen is used for displaying information such as test projects, test results, total test numbers, defective numbers and the like, the three-primary-color backlight board can be set to be white light, blue light and red light, different colors represent different test results, for example, the color of backlight in a normal state is white, when a defective product is detected, the backlight lamp can be set to be red, and the color can be more intuitively reflected to a tester, so that the working efficiency of the tester is greatly improved;
when the detection result data are abnormal, the drive parameter acquisition MCU detects the PCBA to be detected again, obtains new data information and sends the new data information to the main control MCU for rechecking, and the detection quality is improved;
the interval values of a plurality of different maintenance degrees are set according to the maintenance condition after the PCBA board to be detected becomes the defective product and the unqualified check data information of each item, the defective PCBA board is distinguished according to the maintenance difficulty, the maintenance cost, the maintenance time consumption and other conditions after the PCBA board to be detected becomes the defective product, so that a tester can reasonably distinguish the defective product after detecting the defective product through the PCBA board multi-item visual inspection equipment, and the later maintenance processing of the defective product is facilitated to be performed systematically.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a block diagram of the module connections of the present invention;
FIG. 2 is a block diagram of the modular connection of the master MCU4 with the multi-project parameter display unit of the present invention;
FIG. 3 is a schematic structural diagram of a multi-item parameter display unit according to the present invention;
FIG. 4 is a block diagram of the present invention showing the relationship of the source of data;
fig. 5 is a block diagram of the process of the present invention.
Schematic structural diagram of (1).
The reference numerals and names in the figures are as follows:
the device comprises a PCBA board multi-item visual inspection module 1, an item selection module 2, a parameter acquisition MCU3, a main control MCU4, a multi-item parameter display unit 5, a substrate 51, a display control circuit board 52, a three-primary-color backlight board 53, an LCD screen 54, a display chip 55, a three-primary-color control circuit 56, an eight-wire serial port connecting terminal 57, a lifting cushion block 58, a test item display unit 61, a test result display unit 62, a test total display unit 63, a defective total display unit 64 and a maintenance condition display unit 65.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, in the embodiment of the present invention, in the technical solution of the present invention, a method for displaying item parameters of a PCBA board multi-item visual testing device is adopted, and a PCBA board multi-item testing module 1, an item selecting module 2, a parameter collecting MCU3, a main control MCU4, and a multi-item parameter display unit 5 are arranged; the PCBA board multi-item test module 1 is used for detecting the circuit condition of the PCBA board to be detected, and is realized by integrating a plurality of traditional detection circuits, such as internal resistance detection, buzzer detection, Hall detection, direct-current positive terminal voltage detection, load switch condition detection and other detection circuits, so that a multi-item detection mode is realized, aiming at different PCBA boards to be detected, corresponding detection items are selected to be detected, the detection items are selected through the item selection module 2, and the item selection module 2 can be realized by arranging a plurality of item selection switches, or arranging an item selection control system, or realizing a series of modes of function selection such as a trigger device and the like; after the PCBA multi-item test module 1 detects the circuit condition of the PCBA to be detected, the parameter acquisition MCU3 acquires the detection condition, then the detection condition is sent to the main control MCU4 for analysis, and after the detection condition is processed, the result is updated to the multi-item parameter display unit 5;
the multi-project parameter display unit 5 is provided with a substrate 51, a display control circuit board 52 fixed on the substrate 51, a three-primary-color backlight board 53 fixed on the display control circuit board 52, and an LCD screen 54 fixed on the three-primary-color backlight board 53, wherein the display control circuit board 52 is provided with a display chip 55 electrically connected to the LCD screen 54 and a three-primary-color control circuit 56 electrically connected to the three-primary-color backlight board 53, and the LCD screen 54 is provided with a test project display unit 61, a test result display unit 62, a test total display unit 63 and a defective total display unit 64 through the display chip 55;
the PCBA multi-item test module 1 sets corresponding test item information according to a PCBA to be detected, sends the test item information to the main control MCU4, the main control MCU4 sends the test item information to the display chip 55, and the display chip 55 updates the test item display unit 61 according to the test item information;
the main control MCU4 also sends the test item information to the parameter acquisition MCU3, the parameter acquisition MCU3 controls the PCBA board multi-item test module 1 according to the test item information, the PCBA board multi-item test module 1 detects the circuit condition of the PCBA board to be detected, the detection data is obtained and sent to the main control MCU4, the main control MCU4 analyzes and processes the detection data, the detection result data is sent to the display chip 55 after the analysis and processing are finished, and the display chip 55 updates the test result display unit 62, the total test number display unit 63 and the bad number display unit 64 according to the detection result data;
the main control MCU4 controls the operating status of the three-primary-color control circuit 56 according to the detection result data, so that the three-primary-color backlight board 53 reflects the detection condition of the PCBA board to be detected in a backlight manner.
By this way, the LCD screen 54 is used for displaying information such as test items, test results, total test numbers, bad total numbers and the like, the model number adopted by the display chip 55 is GN1621A, the chip is a 32x4 driver, a 256KHz oscillator is built in, and a 32x4bit display RAM memory is embedded; updating display data through a four-wire serial interface; the three primary color backlight plate 53 can be set to white light, blue light and red light, different colors represent different test results, for example, the color of the backlight in a normal state should be white, and the backlight lamp can be set to red when a defective product is detected, so that the color can be more intuitively reflected to a tester, and the working efficiency of the tester can be greatly improved.
Referring to fig. 5, the parameter collection MCU3 sets a plurality of detection pins of different items for the number of detection items to connect with the multiple visual inspection modules, and sets detection data of different detection items according to the potential signal variation sent from different detection pins by the PCBA multi-item test module 1, wherein the detection data of each item includes three types of detection data information, i.e., pass, fail, and abnormal. The main control MCU4 sets the verification data matching the detection data according to the test item information set by the item selection module 2, and extracts the corresponding verification data according to the test item information set by the item selection module 2 to perform the cumulative calculation, so as to obtain the verification result data. The main control MCU4 acquires the detection data of the parameter acquisition MCU3, performs accumulation calculation on the acquired detection data, discriminates the result from the verification result data after calculation, and analyzes the detection result data; by the mode, the detection result of each item after the PCBA to be detected is detected can be displayed on the LCD screen 54, and the total detection number and the defective number of the PCBA can be counted, so that the effect of automatic data counting is achieved.
Referring to fig. 5, when the detection result data is abnormal, the driving parameter collection MCU3 redetects the PCBA board to be detected, obtains new data information, and sends the new data information to the main control MCU4 for rechecking, thereby improving the detection quality.
Referring to fig. 3 and 5, a plurality of interval values of different maintenance degrees are set according to the maintenance condition of the PCBA to be detected after becoming defective and the defective verification data information of each item, and the defective PCBA is distinguished according to the maintenance difficulty, maintenance cost, maintenance time consumption and the like of the PCBA to be detected after becoming defective by acquiring the detection data of the parameter acquisition MCU3 through the master control MCU4, analyzing the maintenance data, and sending the maintenance data to the multi-item parameter display unit 5. The LCD screen 54 is also provided with a maintenance condition display unit 65 through the display chip 55, the display chip 55 updates the maintenance condition display unit 65 according to maintenance data, and the main control MCU4 controls the working state of the three-primary-color control circuit 56 according to the maintenance data, so that the three-primary-color backlight plate 53 reflects the maintenance condition of the PCBA to be detected in a backlight mode, a tester can reasonably distinguish defective products after detecting the defective products through multiple items of visual inspection test equipment of the PCBA, and the later period is facilitated to carry out more systematic maintenance processing on the defective products.
Referring to fig. 2-3, an eight-wire serial connection terminal 57 is disposed on the display control circuit board 52, the main control MCU4 performs four-wire serial communication with the display chip 55 through four wires of the eight-wire serial connection terminal 57, and the main control MCU4 drives the three-primary-color control circuit 56 through the other four wires of the eight-wire serial connection terminal 57. A raised pad 58 is provided on the base plate 51, and the display control circuit board 52 is fixedly supported on the raised pad 58, so that the base plate 51 and the display control circuit board 52 form a space for accommodating electronic components.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (10)
1. A project parameter display method of a PCBA board multi-item visual inspection test device is characterized by comprising a PCBA board multi-item test module, a project selection module, a parameter acquisition MCU, a main control MCU and a multi-project parameter display unit; the multi-project parameter display unit is provided with a substrate, a display control circuit board fixed on the substrate, a three-primary-color backlight board fixed on the display control circuit board and an LCD screen fixed on the three-primary-color backlight board, wherein the display control circuit board is provided with a display chip electrically connected with the LCD screen and a three-primary-color control circuit electrically connected with the three-primary-color backlight board, and the LCD screen is provided with a test project display unit, a test result display unit, a total test display unit and a bad total display unit through the display chip;
the PCBA board multi-item visual inspection module sets corresponding test item information according to a PCBA board to be detected, sends the test item information to the main control MCU, the main control MCU sends the test item information to the display chip, and the display chip updates the test item display unit according to the test item information;
the main control MCU also sends the test item information to the parameter acquisition MCU, the parameter acquisition MCU controls the PCBA board multi-item test module according to the test item information, the circuit condition of the PCBA board to be detected is detected through the PCBA board multi-item visual inspection module, the detection data is obtained and sent to the main control MCU, the main control MCU analyzes and processes the detection data, the detection result data is sent to the display chip after the analysis and processing are finished, and the display chip updates the test result display unit, the total test number display unit and the bad total number display unit according to the detection result data;
the main control MCU controls the working state of the three-primary-color control circuit according to the detection result data, so that the three-primary-color backlight board reflects the detection condition of the PCBA board to be detected in a backlight mode.
2. The item parameter display method of the PCBA board multi-item visual inspection test equipment as recited in claim 1, wherein the parameter acquisition MCU sets a plurality of detection pins of different items for the number of detection items to be connected with the multi-item visual inspection test modules, and sets detection data of different detection items according to potential signal change conditions sent by the multi-item visual inspection test modules of the PCBA board from the different detection pins, wherein the detection data of each item comprises three detection data information of pass, fail and abnormal.
3. A method as claimed in claim 2, wherein the main control MCU sets verification data matching the detection data for the test item information set by the item selection module, and extracts corresponding verification data for cumulative calculation for the test item information set by the item selection module to obtain verification result data.
4. The item parameter display method of the PCBA board multi-item visual inspection test equipment as claimed in claim 3, wherein the main control MCU obtains detection data of the parameter acquisition MCU, performs cumulative calculation on the obtained detection data, discriminates the result from the verification result data after calculation, and analyzes the detection result data.
5. The item parameter display method for the PCBA board multi-item visual inspection test equipment according to claim 4, wherein when the detection result data is abnormal, the parameter acquisition MCU is driven to detect the PCBA board to be detected again, and new data information is obtained and sent to the main control MCU for rechecking.
6. The item parameter display method of the PCBA board multi-item visual inspection test equipment as recited in any one of claims 2-5, wherein a plurality of interval values with different maintenance degrees are set according to maintenance conditions of the PCBA board to be detected after becoming a defective product and unqualified check data information of each item, the main control MCU acquires detection data of the parameter acquisition MCU, analyzes maintenance data and sends the maintenance data to the multi-item parameter display unit through interval value recognition.
7. The item parameter display method of the PCBA board multi-item visual inspection test equipment as recited in claim 6, wherein the LCD screen is further provided with a maintenance condition display unit through a display chip, the display chip updates the maintenance condition display unit according to maintenance data, and the main control MCU controls the working state of the three-primary-color control circuit according to the maintenance data, so that the three-primary-color backlight board reflects the maintenance condition of the PCBA board to be detected in a backlight mode.
8. A method as claimed in claim 1, wherein an eight-wire serial connection terminal is provided on the display control circuit board, the main control MCU performs four-wire serial communication with the display chip via four of the eight-wire serial connection terminals, and the main control MCU drives the three primary color control circuit via the other four wires of the eight-wire serial connection terminals.
9. A method of displaying parameters of an item of visual testing equipment for a PCBA board as claimed in claim 1, wherein raised pads are provided on the base plate, the display control circuit board is fixedly supported on the raised pads, such that the base plate and the display control circuit board define a space for receiving electronic components.
10. A method as claimed in claim 1, wherein the display chip is of type GN 1621A.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116275737A (en) * | 2023-04-03 | 2023-06-23 | 四川特锐祥科技股份有限公司 | Welding fixture for capacitor chip |
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| CN114871118B (en) | 2024-04-09 |
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