CN111781491B - Signal detection method and device capable of testing different PCBs - Google Patents
Signal detection method and device capable of testing different PCBs Download PDFInfo
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- CN111781491B CN111781491B CN202010663732.4A CN202010663732A CN111781491B CN 111781491 B CN111781491 B CN 111781491B CN 202010663732 A CN202010663732 A CN 202010663732A CN 111781491 B CN111781491 B CN 111781491B
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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
- G01R31/2801—Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP]
- G01R31/2806—Apparatus therefor, e.g. test stations, drivers, analysers, conveyors
- G01R31/2808—Holding, conveying or contacting devices, e.g. test adapters, edge connectors, extender boards
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Abstract
The invention discloses a signal detection method and a signal detection device capable of testing different PCBs, wherein the method comprises the following steps: s1, receiving the test instruction information sent by the user and the relevant information of the PCB needing to be detected; s2: selecting a signal detection channel and a detection type according to a PCB to be tested; s3, selecting the detection interval of the signal line and the correlation value to be detected; and S4, collecting and analyzing the signals of the PCB to obtain test data and a test pattern. The method is used for realizing the control of the device, so that the rapid detection can be realized for different PCB boards.
Description
Technical Field
The invention relates to the field of PCB detection, in particular to a signal detection method and a signal detection device capable of testing different PCBs.
Background
Printed-Circuit-Board (PCB), which is called Printed Circuit Board (PCB) for short, is one of the important components in the electronic industry, and almost every kind of electronic equipment, as small as electronic watches and as large as calculators, requires the use of a Printed Circuit Board for the electrical interconnection between electronic components such as integrated circuits. With the progress of the times, the PCB is continuously developed and advanced, and corresponding to the progress, various functional tests are more and more, and are more and more strict, and a stability test of signal transmission and reception of the PCB is one of important functional detection items of the PCB.
The existing PCB signal transmission and reception testing device has certain disadvantages, and when different PCBs are required to be tested in the testing process, the whole testing device needs to be continuously adjusted so that the PCB can be detected in different modes, and the whole testing device is very inconvenient to use, so that the whole testing efficiency is influenced.
Disclosure of Invention
Aiming at the defects in the technology, the invention provides the signal detection method and the signal detection device capable of testing different PCBs, and the problems of single function, inconvenience in use, inaccurate detection effect, easiness in damage of a probe and the like of the traditional detection machine can be solved.
In order to achieve the above object, the present invention provides a signal detection method capable of testing different PCBs, which is characterized by comprising the following steps:
s1, receiving test instruction information sent by a user and relevant information of the PCB to be detected:
s2: selecting a signal detection channel and a detection type according to a PCB to be tested;
s3, selecting the detection interval of the signal line and the correlation value to be detected;
and S4, acquiring and analyzing signals of the PCB to obtain test data and a test pattern.
Preferably, in step S3, different detection sections are selected as the signal line length according to different PCBs, and the ratio of the signal line length to the total signal line is determined, while the detection values, including the maximum value, the minimum value, and the average value, are determined.
The application also discloses a signal detection device capable of testing different PCBs, which comprises a testing device and a testing pen, wherein the testing device and the testing pen are connected through a testing line to form a complete signal detection device; the testing device comprises a base, a fixed seat and a display screen, wherein the lower end of the fixed seat is fixedly connected with the base, the upper end of the fixed seat is provided with a movable quick clamp, and one end of the quick clamp is fixedly connected with the pressing plate through a connecting rod; a support plate for mounting a test module is arranged at the position, corresponding to the pressure plate, of the upper part of the base, and a detection main board is also arranged inside the base; the display screen is arranged on the base, is electrically connected with the detection main board and displays related data information.
Preferably, the fixed seat is fixedly connected with the base through a left plate and a right plate of a 7-shaped structure, the upper ends of the left plate and the right plate are connected through a mounting plate, and a fixing buckle for rapidly clamping and placing a test pen is arranged on one side of the mounting plate; a guide shaft and a bearing plate are arranged between the left plate and the right plate, and two sides of the bearing plate are fixedly connected with the left plate and the right plate and are arranged beside the mounting plate; a plurality of guide shafts are arranged, one end of each guide shaft is fixed on the base, and the other end of each guide shaft is connected with the bearing plate; one side of the pressing plate is sleeved on the guide shaft through the fixing piece, and the pressing plate can move up and down along the guide shaft.
Preferably, the upper part of the pressure plate is provided with a cylinder cushion block connected with the connecting rod, a test block communicated with the test pen is arranged beside the cylinder cushion block, the test block penetrates through the pressure plate, and when the pressure plate moves towards the carrier plate, the test block is contacted with a test module on the carrier plate; the lower portion of the pressing plate is further provided with a plurality of limiting columns, the length of each limiting column is not shorter than the thickness of the corresponding test block, and the limiting columns are symmetrically distributed on the pressing plate.
Preferably, the moving part comprises an installation part, a sliding strip and a pushing handle, the sliding strip and the pushing handle are both fixedly installed on the base, the installation part is placed on the sliding strip and movably connected with the sliding strip, one side of the installation part is fixedly connected with the pushing handle, and the installation part moves along the sliding strip under the action of the pushing handle; and one side of the mounting part, which is close to the support plate, is provided with an anti-static device and a waveform adjusting device, and the anti-static device and the waveform adjusting device are connected with the test module by penetrating under the pressing plate under the action of the pushing hands.
Preferably, the display screen comprises a display and a display board, the display is fixed on the display board, a support frame and a bearing column are arranged at the lower end of the display board, the bearing column is arranged at two ends of the display board, and a fixing port matched with a rotating shaft at the lower end of the display board is arranged at one side close to the display board; the support frame is provided with a plurality of support frames, one end of each support frame is fixedly connected with the base, the other end of each support frame is provided with an inclined plane for placing the display screen, and the included angle between each inclined plane and the horizontal plane is 60-75 degrees.
Preferably, the lower end of the display panel is provided with a notch matched with the support frame, and the upper end of the support frame is movably connected with the display panel.
Preferably, the test pen comprises a test probe, a pen container, a metal spring and a test rod, wherein the metal spring, the test rod and the test probe are sequentially arranged in the pen container from top to bottom, the metal spring and the test rod are fixed together, the lower end of the test rod is in contact with the test probe, and the size of the test probe is smaller than that of the test rod.
Preferably, a bayonet is arranged in the pen container, a metal spring and a test rod are arranged on the upper portion of the bayonet, the lower end of the bayonet is provided with the test probe, the test probe is connected with the test rod through a transmission column, and a limiting plate matched with the bayonet is arranged on the transmission column.
The invention has the beneficial effects that: the method comprises the steps that different detection modes are adopted for different PCBs, in the specific detection process, corresponding detection channels are selected according to the types of the PCBs and items to be detected, in the detection process, in order to further improve the detection speed, the detection is carried out in a proportional conversion mode, and the signal length is restored by using a waveform adjusting device, so that the waveform of a signal line of the whole PCB is obtained, and a user is helped to know the detection data of the whole PCB; for the whole detection device, firstly, the test pen, the test wire and the test device are independent, and a traditional fixed integrated structure is not adopted, so that the disassembly, the maintenance and the correction are more convenient, if a single part is damaged, the single part can be directly replaced without replacing the whole detection device, the cost and the resources are saved, the test probe in the test pen adopts a movable arrangement mode, and when the test probe is in contact with a PCB (printed circuit board) to be detected, the test probe is retracted under the action of pressure so as to be in contact with the test rod, so that the transmission of signals is realized; secondly, an anti-static device and a waveform adjusting device are arranged, so that the equipment can be effectively protected from being damaged due to short circuit and other defects in the test process, the service life of the equipment is prolonged, and the waveform adjusting device can more conveniently and visually display the waveform through self adjustment of the waveform; and a plurality of storage structures are arranged at last, so that the storage is more convenient, and the space occupancy is reduced.
Drawings
FIG. 1 is a flow chart of the steps of the present invention;
FIG. 2 is a perspective view of the base structure of the present invention;
FIG. 3 is a side view of the base structure of the present invention;
FIG. 4 is a view of the base portion of the present invention;
FIG. 5 is a side view of the base portion structure of the present invention;
FIG. 6 is a cross-sectional view of a test pen of the present invention.
The main element symbols are as follows:
1. base 2, fixing seat 3, display screen 5, pressing plate 6, carrier plate 7 and test module
8. Antistatic device 9, waveform adjusting device 11, bearing column 21, quick clamp 22 and fixing buckle
23. Left plate 24, right plate 25, mounting plate 26, bearing plate 27, guide shaft 28, fixing piece
29. Link 31, display plate 32, display plate 33, rotary shaft 41, pusher 42, pusher plate
43. Slide bar 44, mounting piece 51, test block 52, spacing post 53, cylinder gasket
101. Metal spring 102, test rod 103, transfer column 104, test probe 105, bayonet.
Detailed Description
In order to more clearly describe the present invention, the present invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, the present invention discloses a signal detection method capable of testing different PCBs, which includes the following steps:
s1, receiving test instruction information sent by a user and relevant information of the PCB to be detected:
s2: selecting a signal detection channel and a detection type according to a PCB to be tested;
s3, selecting the detection interval of the signal line and the correlation value to be detected;
and S4, acquiring and analyzing signals of the PCB to obtain test data and a test pattern. In step S3, different detection sections are selected as signal line lengths according to different PCBs, and a ratio of the signal line length to the total signal line is determined, while detection values including a maximum value, a minimum value, and an average value are determined. In the specific embodiment, the information of the PCB needing to be tested is acquired, so that a matched test module can be selected, then a corresponding signal detection channel and a detection type are selected, the signal detection channel is processed by adopting an anti-static device and a waveform adjusting device, and the anti-static device adopts the most advanced single-row direct plug high integration small-volume technology at home and abroad, so that the module has the functions of isolation characteristic, self-recovery overload short circuit protection and voltage stabilization output, meanwhile, the influence of signals outside the board to be tested on the test device is prevented, and the test accuracy is improved; in addition, the detection efficiency is accelerated by referring to a proportional conversion mode, for example, when the transmission time of a certain section of circuit of the PCB is measured, only one end of the PCB needs to be selected for detection, and the distance between the whole PCB is calculated by detecting the time when an analog signal passes through the distance, wherein the selected position is uncertain, and at least two different positions are detected by the same item; the maximum value, the minimum value and the average value of the detection values are adjusted by a waveform adjusting device according to a set formula, and the detected graphic signals are finally fed back on a display screen by 100 percent, so that the result of the whole PCB can be obtained from a small detection distance, and the detection efficiency is further improved; because the detection results of the same item of the same PCB are the same, the detection results can be obtained through two times of waveform visual comparison without complicated data comparison.
Referring to fig. 1 to 6, the present application discloses a signal detection device capable of testing different PCBs, which includes a testing device and a testing pen, wherein the testing device and the testing pen are connected by a testing line to form a complete signal detection device; the testing device comprises a base 1, a fixed seat 2 and a display screen 3, wherein the lower end of the fixed seat 2 is fixedly connected with the base 1, the upper end of the fixed seat is provided with a movable quick clamp 21, and one end of the quick clamp 21 is fixedly connected with a pressure plate 5 through a connecting rod 29; a carrier plate 6 for installing a test module 7 is arranged at the upper part of the base 1 corresponding to the pressure plate 5, and a detection mainboard is also arranged inside the base 1; the moving part is arranged beside the carrier plate 6, the moving part is provided with an anti-static device 8 and a waveform adjusting device 9, and the display screen 3 is arranged on the base 1 and is electrically connected with the detection mainboard to display related data information. More specifically, through with the test pen, test line and testing arrangement three exist independently, do not adopt traditional fixed integral type structure, thereby more conveniently dismantle, maintenance and correction, if the single part appears damaging, can directly carry out the change of single part and need not to change whole detection device, save cost and resource, through installing test module on the support plate when using, fix through the clamp plate, thereby prevent to shift when using, the test pen contacts with the PCB board that waits to detect, relevant information transmission is to test module in, show relevant information through the display screen at last, thereby know the detection information of PCB board.
In order to achieve the purpose, the fixed seat 2 is fixedly connected with the base 1 through a left plate 23 and a right plate 24 which are in a 7-shaped structure, the upper ends of the left plate 23 and the right plate 24 are connected through a mounting plate 25, and one side of the mounting plate 25 is provided with a quick clamp 21 and a fixing buckle 22 for placing a test pen; a guide shaft 27 and a bearing plate 26 are further arranged between the left plate 23 and the right plate 24, and two sides of the bearing plate 26 are fixedly connected with the left plate 23 and the right plate 24 and are arranged beside the mounting plate 25; a plurality of guide shafts 27 are arranged, one end of each guide shaft 27 is fixed on the base 1, and the other end of each guide shaft 27 is connected with the bearing plate 26; one side of clamp plate 5 cup joints on guide shaft 27 through stationary blade 28 to make clamp plate 5 can carry out the up-and-down motion along guide shaft 27, in this embodiment, through the cooperation of guide shaft and clamp plate, thereby make under the drive of quick clamp, make the clamp plate realize the up-and-down motion, thereby fix the test module who is located the support plate, prevent to take place to shift at the in-process that uses.
The upper part of the pressure plate 5 is provided with a cylinder cushion block 53 connected with the connecting rod 29, a test block 51 communicated with the test pen is arranged beside the cylinder cushion block 53, the test block 51 penetrates through the pressure plate 5, and when the pressure plate moves towards the carrier plate, the test block 51 is contacted with the test module 7 on the carrier plate 6; the lower part of the pressing plate 5 is also provided with a plurality of limiting columns 52, the length of each limiting column 52 is not shorter than the thickness of the corresponding testing block 5, and the limiting columns 52 are symmetrically distributed on the pressing plate 5. In this embodiment, contact with the test module through setting up the test block, and the test block passes through the test wire and links to each other with the test pen to form a complete detection access, the relevant information that the test pen obtained is through the processing back of test module, simultaneously through the combined action of antistatic device and waveform adjusting device, through the processing that detects the mainboard, finally shows on the display screen, helps the user more directly perceivedly to know the relevant information of PCB board.
The moving part comprises a mounting part 44, a sliding strip 43 and a pushing hand 41, wherein the sliding strip 43 and the pushing hand 41 are both fixedly mounted on the base 1, the mounting part 44 is placed on the sliding strip and movably linked with the sliding strip 43, one side of the mounting part 44 is fixedly connected with the pushing hand 41, and the mounting part moves along the sliding strip 43 under the action of the pushing hand 41; the mounting part 44 is provided with an antistatic device 8 and a waveform adjusting device 9 on one side close to the carrier plate 6, and the antistatic device and the waveform adjusting device are connected with the test module 7 by the pushing hands 41 penetrating to the lower part of the pressing plate 5. More specifically, the mounting member moves along the slide bar through the cooperation of the push plate 42 and the push handle 41, so that the anti-static device and the waveform adjusting device are deeply inserted under the press plate to be in contact with the test module when in use.
The display screen 3 comprises a display 32 and a display panel 31, the display 32 is fixed on the display panel 31, the lower end of the display panel 31 is provided with a support frame and a bearing column 11, the bearing column 11 is arranged at two ends of the display panel 31, and one side close to the display panel 31 is provided with a fixing port matched with a rotating shaft 33 at the lower end of the display panel 31; the supporting frames are provided with a plurality of supporting frames, one end of each supporting frame is fixedly connected with the base, the other end of each supporting frame is provided with an inclined plane for placing the display screen, and the included angle between each inclined plane and the horizontal plane is 60-75 degrees; the lower extreme of display panel 31 is equipped with the breach with support frame looks adaptation, the upper end and the display panel 31 active link of support frame, in this embodiment, setting through a plurality of structures, make touch-control formula display screen can rotate along the axis of rotation, can the lock on base upper portion when accomodating, reduce the space occupancy, secondly the special construction setting of support frame, owing to have certain contained angle with the horizontal direction, consequently under the effect of display screen self gravity, thereby can stabilize and prevent on the support frame, it is more convenient nature to use.
The test pen comprises a test probe 104, a pen container, a metal spring 101 and a test rod 102, wherein the metal spring 101, the test rod 102 and the test probe 104 are sequentially arranged in the pen container from top to bottom, the metal spring 101 and the test rod 102 are fixed together, and the size of the test probe 104 is smaller than that of the test rod 402. A bayonet 105 is arranged in the pen container, a metal spring 101 and a test rod 102 are arranged on the upper portion of the bayonet 105, a test probe 104 is arranged at the lower end of the bayonet 105, the test probe 104 is connected with the test rod 102 through a transmission column 103, and a limiting plate matched with the bayonet 105 is arranged on the transmission column 103. In the embodiment, when the test probe of the test pen is contacted with the PCB, the test probe retracts into the pen container under the action of pressure, so that the transmission column is pushed to be contacted with the test rod, and meanwhile, the metal spring is compressed to a certain degree to connect the whole test circuit; when not using, metal spring resumes deformation to promote the transmission post downstream, limiting plate downstream one end distance breaks away from with the test rod mutually, because the effect of bayonet socket and limiting plate, can only downstream one end distance, thereby can avoid always switching on, prevent to cause the loss to testing arrangement.
The work flow of the application is as follows: firstly, selecting a proper test module for a PCB to be detected, placing the test module into a carrier plate of a base, then extending an anti-static device and a waveform adjusting device under a pressing plate by using a pushing hand, then moving the pressing plate downwards to enable a test block on the pressing plate to be in contact with the test module, adjusting related parameter information by using a touch display screen, after the adjustment is finished, contacting a test pen with the PCB to be detected, sending related information to the PCB by the test module through the test pen, then returning a feedback signal of the PCB by the test pen, firstly distinguishing and removing signals except the feedback signal by the anti-static device, then forming signal data and graphs by analyzing a detection main board, then adjusting the signal data and the graphs by using a waveform adjusting device, thereby enabling the detected signal graphs to be finally fed back to the display screen by 100 percent, and thus a user can detect different areas of the same section, and judging whether the PCB has problems or not by judging whether the waveforms are the same or not.
The above disclosure is only for a few specific embodiments of the present invention, but the present invention is not limited thereto, and any variations that can be considered by those skilled in the art are intended to fall within the scope of the present invention.
Claims (8)
1. A signal detection device capable of testing different PCBs is characterized by comprising a testing device and a testing pen, wherein the testing device and the testing pen are connected through a testing line to form a complete signal detection device; the testing device comprises a base, a fixed seat and a display screen, wherein the lower end of the fixed seat is fixedly connected with the base, the upper end of the fixed seat is provided with a movable quick clamp, and one end of the quick clamp is fixedly connected with the pressing plate through a connecting rod; a support plate for mounting the test module is arranged at the position, corresponding to the pressure plate, of the upper part of the base, and a detection main board is also arranged in the base; a moving part is arranged beside the carrier plate, an anti-static device and a waveform adjusting device are arranged on the moving part, and the display screen is arranged on the base, is electrically connected with the detection main board and displays related data information;
the fixing seat is fixedly connected with the base through a left plate and a right plate of a 7-shaped structure, the upper ends of the left plate and the right plate are connected through a mounting plate, and a fixing buckle for placing a test pen and a quick clamp are arranged on one side of the mounting plate; a guide shaft and a bearing plate are further arranged between the left plate and the right plate, and two sides of the bearing plate are fixedly connected with the left plate and the right plate and are arranged beside the mounting plate; a plurality of guide shafts are arranged, one end of each guide shaft is fixed on the base, and the other end of each guide shaft is connected with the bearing plate; one side of the pressing plate is sleeved on the guide shaft through a fixing piece, and the pressing plate can move up and down along the guide shaft;
the upper part of the pressure plate is provided with a cylinder cushion block connected with the connecting rod, a test block communicated with the test pen is arranged beside the cylinder cushion block, the test block penetrates through the pressure plate, and when the pressure plate moves towards the carrier plate, the test block is contacted with a test module on the carrier plate; the lower part of the pressing plate is also provided with a plurality of limiting columns, the length of each limiting column is not shorter than the thickness of the test block, and the limiting columns are symmetrically distributed on the pressing plate.
2. The signal detection device capable of testing different PCBs as recited in claim 1, wherein the moving member comprises a mounting member, a slide bar and a pushing handle, the slide bar and the pushing handle are both fixedly mounted on the base, the mounting member is placed on the slide bar and movably linked with the slide bar, one side of the mounting member is fixedly connected with the pushing handle, and the mounting member moves along the slide bar under the action of the pushing handle; and one side of the mounting part, which is close to the support plate, is provided with an anti-static device and a waveform adjusting device, and the anti-static device and the waveform adjusting device are connected with the test module by penetrating under the pressing plate under the action of the pushing hands.
3. The signal detection device capable of testing different PCBs as recited in claim 1, wherein said display panel comprises a display and a display panel, said display is fixed on the display panel, the lower end of the display panel is provided with a support frame and a bearing column, said bearing column is arranged at both ends of the display panel, one side near the display panel is provided with a fixing port adapted to the rotating shaft at the lower end of the display panel; the support frame is provided with a plurality of support frames, one end of each support frame is fixedly connected with the base, the other end of each support frame is provided with an inclined plane for placing the display screen, and the included angle between each inclined plane and the horizontal plane is 60-75 degrees.
4. The apparatus of claim 3, wherein the lower end of the display panel is provided with a notch adapted to the support frame, and the upper end of the support frame is movably connected to the display panel.
5. The signal detection device capable of testing different PCBs as recited in claim 1, wherein the test pen comprises a test probe, a pen container, a metal spring and a test rod, the metal spring, the test rod and the test probe are sequentially arranged inside the pen container from top to bottom, the metal spring and the test rod are fixed together, the lower end of the test rod is in contact with the test probe, and the diameter of the test probe is smaller than that of the test rod.
6. The signal detection device capable of testing different PCBs as recited in claim 5, wherein a bayonet is arranged in the pen container, a metal spring and a test rod are arranged on the upper portion of the bayonet, the test probe is arranged at the lower end of the bayonet, the test probe and the test rod are connected through a transmission column, and a limiting plate matched with the bayonet is arranged on the transmission column.
7. A signal detection method capable of testing different PCBs, characterized by being applied to the signal detection device of any one of claims 1-6; the method comprises the following steps:
s1, receiving the test instruction information sent by the user and the relevant information of the PCB to be detected;
s2: selecting a signal detection channel and a detection type according to a PCB to be tested;
s3, selecting the detection interval of the signal line and the correlation value to be detected;
and S4, collecting and analyzing the signals of the PCB to obtain test data and a test pattern.
8. The signal detecting method capable of testing different PCBs as claimed in claim 7, wherein in step S3, different detection intervals are selected as signal line length according to different PCBs, and the ratio of the signal line length to the total signal line is determined, and detection values including maximum value, minimum value and average value are determined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010663732.4A CN111781491B (en) | 2020-07-10 | 2020-07-10 | Signal detection method and device capable of testing different PCBs |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010663732.4A CN111781491B (en) | 2020-07-10 | 2020-07-10 | Signal detection method and device capable of testing different PCBs |
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| CN111781491A CN111781491A (en) | 2020-10-16 |
| CN111781491B true CN111781491B (en) | 2022-09-09 |
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| CN111781491A (en) | 2020-10-16 |
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