CN116008773A - Circuit board detection method, device and storage medium - Google Patents
Circuit board detection method, device and storage medium Download PDFInfo
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- CN116008773A CN116008773A CN202211474758.XA CN202211474758A CN116008773A CN 116008773 A CN116008773 A CN 116008773A CN 202211474758 A CN202211474758 A CN 202211474758A CN 116008773 A CN116008773 A CN 116008773A
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Abstract
The invention provides a circuit board detection method, a device and a storage medium, wherein the method comprises the following steps: identifying the types of components in a target circuit module of the circuit board to be tested; opening a corresponding test channel according to the type of each component in the target circuit module so as to test each component in the target circuit module, wherein components of different types correspond to different test channels respectively; reading a test value of each component in the target circuit module; and comparing the test value of each component in the target circuit module with the corresponding reference value range to obtain the detection result of the target circuit module. Therefore, the modularized measurement can be carried out on the whole circuit board, the welding quality of components and the problems of materials can be detected in batches, and meanwhile, the components can be detected, and the circuit connection mode can be compatible; the circuit board detection method can replace the existing multimeter detection mode, and is not complicated like multimeter measurement.
Description
Technical Field
The embodiment of the invention relates to the technical field of detection equipment, in particular to a circuit board detection method, a circuit board detection device and a storage medium.
Background
The whole process of welding the PCB blank through the SMT loading and the DIP plug-in is PCBA (Printed Circuit Board Assembly), and the resistance-capacitance sensing of the PCBA is usually required to be detected in the production process of the PCBA. The existing PCBA detection mode is to electrify the equipment to be tested, and the parameters such as voltage and current of key nodes are measured point to point by using a digital universal meter to confirm whether the design requirement is met. The PCBA detection mode has various defects, for example, the existing detection mode is completely based on the silk-screen value or the standard value of the component, and cannot be effectively compatible with a serial-parallel circuit, and the measured value and the standard value are greatly different due to the circuit characteristics after the component is combined with the actual serial-parallel circuit, so that the measured data of the component is not accurate enough; for another example, the measured value of the digital multimeter cannot distinguish information such as resistance-capacitance sense, and the measured value cannot be compatible with detection of a large number of devices because the applicable gear needs to be adjusted to perform measurement.
Disclosure of Invention
The embodiment of the invention aims to provide a circuit board detection method, a circuit board detection device and a storage medium, which aim to solve the problems of the existing PCBA detection mode.
In a first aspect, an embodiment of the present invention provides a circuit board detection method, including:
identifying the types of components in a target circuit module of the circuit board to be tested;
opening a corresponding test channel according to the type of each component in the target circuit module so as to test each component in the target circuit module, wherein components of different types correspond to different test channels respectively;
reading a test value of each component in the target circuit module;
and comparing the test value of each component in the target circuit module with a corresponding reference value range to obtain a detection result of the target circuit module, wherein each test item of the circuit board to be detected is correspondingly provided with the reference value range.
In the technical scheme provided by the embodiment of the invention, the types of the components in the target circuit module of the circuit board to be tested are automatically identified, then the corresponding test channels are automatically opened according to the identified types of the components so as to test the target circuit module, and finally the test value and the reference value range are automatically compared to obtain the detection result, so that the modularized measurement can be carried out on the whole circuit board, the problems of welding quality of the components and materials per se can be detected in batches, and meanwhile, the components per se can be detected, and the circuit connection mode can be compatible; the circuit board detection method can replace the existing multimeter detection mode, and is not complicated like multimeter measurement.
Optionally, the identifying the type of the component in the target circuit module of the circuit board to be tested includes:
transmitting a detection electric signal to a target circuit module of the circuit board to be detected;
acquiring a preset characteristic value of the target circuit module;
and determining the types of components in the target circuit module according to the preset characteristic value of the target circuit module.
Optionally, after the obtaining the preset characteristic value of the target circuit module, the method further includes:
and if the preset characteristic value of the target circuit module is not obtained, checking whether the target circuit module is connected.
Optionally, the detected electrical signal is a sine wave signal with a fixed frequency, and the preset characteristic value is a voltage value; the determining the type of the component in the target circuit module according to the preset characteristic value of the target circuit module includes:
if the preset characteristic value is a fixed value, determining that components in the target circuit module are resistors;
and if the preset characteristic value rises in the preset time period, determining that the component in the target circuit module is a capacitor.
Optionally, the detected electrical signal is a variable-frequency sine wave signal, and the preset characteristic value is a resistance value; the determining the type of the component in the target circuit module according to the preset characteristic value of the target circuit module includes:
and if the preset characteristic value changes along with the frequency change of the detection electric signal, determining that the component in the target circuit module is an inductor.
Optionally, the reference value range is obtained by machine learning based on a test value of the qualified circuit board and/or an error value of the component.
Optionally, before identifying the type of the component in the target circuit module of the circuit board to be tested, the method further includes:
and numbering the test items of the circuit board to be tested.
In a second aspect, embodiments of the present invention provide a circuit board detection device, including all or part of the functional modules in the method described in any one of the possible implementations of the first aspect.
In a third aspect, embodiments of the present invention provide a circuit board detection device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method described in any one of the possible implementations of the first aspect when executing the program.
In a fourth aspect, embodiments of the present invention provide a computer readable storage medium storing a computer program which, when executed by a processor, implements the method described in any one of the possible implementations of the first aspect.
Drawings
One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.
Fig. 1 is a schematic structural diagram of a circuit board detection device according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a circuit board detection method according to an embodiment of the present invention;
FIG. 3a is a schematic diagram of a resistance test;
FIG. 3b is one of the schematic diagrams of a capacitance test;
FIG. 3c is a second schematic diagram of a capacitance test;
FIG. 3d is a schematic diagram of a capacitance test;
fig. 4 is a flow chart of another circuit board detection method according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another circuit board detection device according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another circuit board detection device according to an embodiment of the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
Referring to fig. 1, fig. 1 is a circuit board detection device provided in an embodiment of the present application, where the circuit board detection device 100 includes a control unit 110, an identification unit 120, a test channel control unit 130, a reading unit 140, and a comparison unit 150.
Specifically, the control unit 110 is electrically connected to the identification unit 120, the test channel control unit 130, the reading unit 140, and the comparing unit 150, wherein the control unit 110 may be an MCU (Microcontroller Unit, micro control unit) or the like.
The identification unit 120 can identify the types of components, including resistors, capacitors, inductors, light emitting LEDs, protective diodes, triodes, MOS transistors, etc., and the identification unit 120 can identify a certain component, specifically, a resistor, a capacitor, an inductor, etc.
The circuit board detection device 100 is formed with multiple paths of test channels corresponding to different types of components, each type of component corresponds to one path of test channel, each path of test channel can be used for testing the corresponding type of component, for example, the circuit board detection device 100 is formed with a resistance test channel, a capacitance test channel and an inductance test channel, the resistance test channel, the capacitance test channel and the inductance test channel respectively correspond to resistance, capacitance and inductance, and if the component is resistance, the component can be tested through the resistance test channel; if the component is a capacitor, the component can be tested through the capacitor test channel; if the component is an inductor, the component can be tested through the inductor test channel.
The test channel control unit 130 is provided with a plurality of test channels corresponding to the plurality of test channels, each test channel is provided with one test channel control unit 130, and each test channel control unit 130 can open and close the corresponding test channel, wherein the circuit board detection device 100 also generally comprises a built-in power supply loop, the built-in power supply loop is electrically connected with the plurality of test channel control units 130, so as to form a plurality of test channels, and the test channel control units 130 can comprise relays and the like.
The control unit 110 can control the plurality of test channel control units 130 according to the types of the components identified by the identification unit 120, so as to open the corresponding test channels and close the other test channels. For example, if the component identified by the identifying unit 120 is a resistor, the control unit 110 controls the plurality of test channel control units 130 to open the resistor test channels and close other test channels.
The reading unit 140 can read the test value of the component, and the comparing unit 150 can compare the test value read by the reading unit 140 with a preset reference value range to determine whether the read test value is within the reference value range. The control unit 110 can determine the detection result from the comparison result of the comparison unit 150.
Optionally, referring to fig. 1, in the present embodiment, the circuit board detection device 100 further includes an output unit 160, and the control unit 110 is electrically connected to the output unit 160, and the control unit 110 can control the output unit 160 to output the detection result.
Optionally, in this embodiment, the circuit board detection device 100 is compatible with detection of light emitting LEDs, protective diodes, triodes, MOS transistors at the same time.
Referring to fig. 2, fig. 2 is a circuit board detection method according to an embodiment of the present application, which may be implemented based on the circuit board detection device 100 as described above, and includes, but is not limited to, the following steps:
step S210: and identifying the types of components in the target circuit module of the circuit board to be tested.
Specifically, the circuit board to be tested may be a PCBA, etc., and the description will be given below taking the example in which the circuit board to be tested is a PCBA. After the surface mount technology is finished through SMT, the PCBA needs to be detected to judge whether the PCBA has components and parts poor welding, the problems of materials, the deviation of measured values after the series-parallel connection of the resistance-capacitance sensing and the like. The PCBA typically has a plurality of circuit modules disposed thereon, each circuit module including one or more components. When a certain circuit module comprises a plurality of components, the circuit module is formed by the components in a serial-parallel connection mode.
All or part of the plurality of circuit modules of the PCBA are circuit modules to be detected, a test point is reserved on the PCBA corresponding to each circuit module to be detected, and the circuit board detection device 100 can be communicated with any circuit module to be detected through the test point of the any circuit module to be detected, so that the any circuit module to be detected can be detected. The target circuit module can be any circuit module to be tested of the PCBA.
A plurality of test items are usually planned in advance for a PCBA, and each test item is measured for a parameter of a circuit module or component to be tested of the PCBA (the parameter to be measured may include voltage, current, power, resistance-capacitance value, etc.). In order to be applicable to PCBA inspection in mass production, optionally, in the present embodiment, before step S210, the circuit board inspection method further includes: and numbering the test items of the circuit board to be tested. Therefore, the orderly batch detection of PCBA is facilitated, the problem part can be rapidly positioned according to the number, and the maintenance and the inspection are convenient.
The circuit board inspection device 100 can identify the type of the component in the target circuit module according to the characteristic specific to each component, wherein the characteristic specific to the component may be an appearance characteristic or an electrical characteristic. Alternatively, in the present embodiment, the circuit board inspection device 100 may identify the type of the component in the target circuit module by performing steps S211 to S213.
Step S211: and sending the detection electric signal to a target circuit module of the circuit board to be detected.
Specifically, after the circuit board inspection device 100 is in contact with the test point of the target circuit module, the recognition unit 120 can transmit a probe electrical signal to the target circuit module. For example, the identification unit 120 includes a sine signal generator capable of transmitting a sine wave signal to the target circuit module.
Step S212: and acquiring a preset characteristic value of the target circuit module.
Specifically, in a preset period of time after the identification unit 120 sends the detection electrical signal to the target circuit module of the circuit board to be tested, the identification unit 120 can collect preset characteristic values of the target circuit module, where the preset characteristic values may include voltage, current, power, resistance-capacitance sensing value, and the like.
Step S213: and determining the types of components in the target circuit module according to the preset characteristic value of the target circuit module.
Specifically, the identifying unit 120 may determine the type of the component in the target circuit module according to the collected preset characteristic value of the target circuit module after collecting the preset characteristic value of the target circuit module. For example, the identification unit 120 includes a reference circuit capable of identifying the type of the component according to a preset characteristic value of the target circuit module.
For example, when the detected electrical signal is a sine wave signal with a fixed frequency and the preset characteristic value is a voltage value, if the preset characteristic value is a fixed value, determining that the component in the target circuit module is a resistor; if the preset characteristic value rises in the preset time period, determining that the component in the target circuit module is a capacitor.
Specifically, referring to fig. 3a, when the voltage value output by the identifying unit 120 to the target circuit module is a fixed value, if the component in the target circuit module is a resistor, the voltage values at two ends of the target circuit module (i.e., the two ends of the target circuit module, i.e., the test points of the target circuit module) are fixed values; referring to fig. 3b and 3c, since the voltage across the capacitor and the time are in a linear relationship, if the component in the target circuit module is a capacitor, the voltage value across the target circuit module will rise within a preset time period, so the identifying unit 120 identifies whether the component in the target circuit module is a resistor or a capacitor according to whether the voltage value changes within the preset time period.
For another example, when the detected electrical signal is a variable-frequency sine wave signal and the preset characteristic value is a resistance value, if the preset characteristic value changes along with the frequency change of the detected electrical signal, the component in the target circuit module is determined to be an inductance.
Specifically, in the case where the identification unit 120 outputs the variable-frequency sine wave signal to the target circuit module, referring to fig. 3d, since the impedance of the inductance with respect to the alternating signal varies with the frequency of the sine wave signal, if the resistance values at both ends of the target circuit module vary with the frequency of the detection electric signal, the identification unit 120 determines that the component in the target circuit module is the inductance.
Therefore, the identification unit 120 can accurately judge the electrical property unit of the component to be tested by using the sinusoidal signal generator and the reference circuit.
Optionally, in this embodiment, after step S211, the circuit board detection method further includes: if the preset characteristic value of the target circuit module is not obtained, checking whether the target circuit module is on or not.
Specifically, after the circuit board to be tested enters the area to be tested, the circuit board detection device 100 can identify the type of the component in the target circuit module after the test point of the circuit board to be tested is connected to the circuit board detection device 100. If the recognition unit 120 sends the detection electrical signal to the target circuit module of the circuit board to be tested, the recognition unit 120 does not obtain the preset characteristic value of the target circuit module, and there may be a poor contact between the circuit board to be tested and the circuit board detection device 100, so that the contact of the area to be tested may be checked to be good, so as to perform fault removal.
Step S220: and opening a corresponding test channel according to the type of each component in the target circuit module so as to test each component in the target circuit module.
Specifically, the components of different types correspond to different test channels, and after the circuit board detection device 100 completes the type identification of the components, the circuit board detection device 100 opens the corresponding test channel, and the switch of the test channel may be controlled by using a relay (i.e. the test channel control unit 130). For example, testing the resistor, opening a resistor test channel, connecting the resistor to be tested into a built-in power supply loop, and collecting the value through a collecting plate and the like; for another example, a triode is tested, a triode test channel is opened, the triode to be tested is connected into a built-in power supply loop, three-point voltage drop of the triode is collected by utilizing a collecting plate and the like, the G pole of the triode is controlled to be connected with current through a relay, the triode is started, and whether the triode is good or not is judged.
For example, referring to fig. 3a, when measuring the resistance, the circuit board detection device 100 sends a constant current source to the object to be tested, and can calculate the resistance of the object to be tested by measuring the voltages across the object to be tested. Let the constant current sent by the circuit board detection device 100 be I and the resistance of the detected object be R X The voltage of the measured object is V RX Resistance R of measured object X ＝V RX I. The current will vary according to the resistance value of the test object, and the larger the resistance, the smaller the current.
For another example, referring to fig. 3b and 3C, in measuring capacitance, the circuit board detection device 100 sends a constant current source to the object to be measured to measure capacitance C x Charging is performed. After a certain period of time T, the capacitance C of the measured object is measured again x Voltage V of (2) cx Then by the formula i×t=c x ×V cx The capacitance C can be obtained x Is a value of (2).
As another example, referring to fig. 3d, in measuring inductance, inductance L of a test object x Sine wave signals with fixed frequencies are respectively added at two ends. Since the impedance of the inductance with respect to the alternating signal varies with frequency, a sine wave signal of a fixed frequency is applied to the test object, and then the current value I of the current through the test object is measured. The alternating impedance EIS of the capacitor is obtained from V/I, and then the impedance formula eis=2pi×freq×l x The inductance value can be calculated.
Step S230: and reading the test value of each component in the target circuit module.
Specifically, during the component test, the circuit board inspection device 100 may collect test values through the reading unit 140, for example, the reading unit 140 may include a collection board through which test value collection can be performed.
The plurality of acquisition boards are controlled by relays, the control principle is accessed through software, and when the detection is carried out, the detection unit 120 recognizes the type, and then corresponding test channels are opened correspondingly to detect the type. Meanwhile, the device and the method not only detect the components, but also are compatible with circuit connection modes.
Step S240: and comparing the test value of each component in the target circuit module with the corresponding reference value range to obtain the detection result of the target circuit module.
Specifically, each test item of the circuit board to be tested is correspondingly provided with a reference value range, the reference value ranges corresponding to all the test items are prestored in the circuit board detection device 100, and each test item corresponds to one reference value range. The circuit board detection device 100 can query the reference value range corresponding to any one test item according to the number of the test item.
The comparing unit 150 can compare the test value of each component in the target circuit module with the corresponding reference value range, if the test value is within the reference value range, the test value is qualified, and the detection result of the target circuit module is passed; if the test value is not in the reference value range, the test value is unqualified, and the detection result of the target circuit module is failed.
Alternatively, in the present embodiment, if the test value is not within the reference value range, the reject information is output.
Specifically, if the detection result of the target circuit module is failed, the circuit board detection device 100 can output the failure information through the output unit 160. The unqualified information can comprise the number of the unqualified test item, so that when the test value has obvious difference relative to the reference value, the number can be obtained through the retrieval tool, the problem part can be rapidly positioned, and the maintenance and the inspection are convenient.
Optionally, in this embodiment, the reference value range is obtained by machine learning based on a test value of the qualified circuit board and/or an error value of the component.
Specifically, the method includes measuring parameters (including, but not limited to, voltage, current, power, resistance-capacitance values, etc.) of one or more qualified PCBA by using a multimeter, and then introducing the error value between the measured parameters and the component material itself into the circuit board inspection device 100. The circuit board detection device 100 is pre-stored with a training model, and the training model can perform machine learning based on the measured parameters of the qualified PCBA and the error value of the component material, so as to obtain the reference value range corresponding to each test item. When the newly produced PCBA needs to be detected, after the specific characteristic value is obtained by the circuit board detection device 100, the resistance-capacitance sensing test value measured at the time is used for carrying out simulation comparison with the reference value learned for the first time, and if a larger difference occurs between the comparison values, the problem of the newly produced PCBA can be judged.
In the technical scheme provided by the embodiment of the invention, the types of the components in the target circuit module of the circuit board to be tested are automatically identified, then the corresponding test channels are automatically opened according to the identified types of the components so as to test the target circuit module, and finally the test value and the reference value range are automatically compared to obtain the detection result, so that the modularized measurement can be carried out on the whole circuit board, the problems of welding quality of the components and materials per se can be detected in batches, and meanwhile, the components per se can be detected, and the circuit connection mode can be compatible; the circuit board detection method can replace the existing multimeter detection mode, and is not complicated like multimeter measurement.
The circuit board detection device 100 can have the following advantages by adopting the detection mode:
1. the PCBA can be measured in mass production, the characteristics of components can be automatically identified, and then the measurement range and the component measurement of corresponding parameters can be automatically adjusted to search out defective products;
2. the method can perform self-learning, effectively judge related parameters such as different resistance values, capacitance values, inductance values and the like, quickly position failure positions and greatly improve maintenance and reworking efficiency;
3. the integrated acquisition data are adopted, steady state error values are fused, and the multi-channel test channels can be independently identified and controlled and can be compatible with various PCBA;
4. the circuit board detection device 100 works in a modularized mode, and is matched with a plurality of test channels to collect data, so that the data precision is high.
Referring to fig. 4, fig. 4 is a circuit board detection method according to an embodiment of the present application, which is implemented based on the circuit board detection device 100 as described above, and includes, but is not limited to, the following steps:
step S410: and judging the attribute of the component.
Specifically, the component attribute judgment identifies the type of the component in the target circuit module of the circuit board to be tested, and if the component attribute cannot be judged, step S420 is executed; if the component attribute can be determined, step S430 is performed.
Step S420: the area to be tested is checked for good contact.
Specifically, if the component attribute cannot be determined, it is checked whether or not the test point of the target circuit module is in good contact with the circuit board detection device 100.
Step S430: the test channel is opened.
Specifically, if the component attribute can be determined, the control unit 110 controls the test channel control unit 130 to open the corresponding test channel.
Step S440: the test value is read.
Step S450: the test value is compared with a reference value.
Specifically, the reference value is a range of intervals, and if the test value is not within the range of intervals, step S460 is performed; if the test value is within the interval range, ending the flow.
Step S460: and outputting unqualified information.
Referring to fig. 5, fig. 5 is a circuit board detection device provided in an embodiment of the present application, the circuit board detection device 500 may be the circuit board detection device 100 or a part of the circuit board detection device 100 as described above, the circuit board detection device 500 includes an identification unit 510, a test channel control unit 520, a reading unit 530, and a comparison unit 540, and detailed descriptions of respective units of the circuit board detection device 500 are as follows:
an identifying unit 510, configured to identify a type of a component in a target circuit module of the circuit board to be tested;
the test channel control unit 520 is configured to open a corresponding test channel according to a type of each component in the target circuit module, so as to test each component in the target circuit module, where the circuit board detection device is provided with multiple test channels corresponding to components of different types;
a reading unit 530, configured to read a test value of each component in the target circuit module;
and the comparing unit 540 is configured to compare the test value of each component in the target circuit module with the corresponding reference value range to obtain a detection result of the target circuit module.
Optionally, the identifying unit 510 includes:
the transmitting unit is used for transmitting detection electric signals to a target circuit module of the circuit board to be detected;
the acquisition unit is used for acquiring a preset characteristic value of the target circuit module;
and the determining unit is used for determining the types of the components in the target circuit module according to the preset characteristic value of the target circuit module.
Optionally, the circuit board detection device 500 further includes an inspection unit, configured to, after acquiring the preset characteristic value of the target circuit module, inspect whether the target circuit module is turned on if the preset characteristic value of the target circuit module is not acquired.
Optionally, the detected electrical signal is a sine wave signal with a fixed frequency, and the preset characteristic value is a voltage value; the determining unit is configured to determine a type of a component in the target circuit module according to a preset characteristic value of the target circuit module, and specifically includes: if the preset characteristic value is a fixed value, determining that components in the target circuit module are resistors; and if the preset characteristic value rises in the preset time period, determining that the component in the target circuit module is a capacitor.
Optionally, the detected electrical signal is a variable-frequency sine wave signal, and the preset characteristic value is a resistance value; the determining unit is configured to determine a type of a component in the target circuit module according to a preset characteristic value of the target circuit module, and specifically includes: and if the preset characteristic value changes along with the frequency change of the detection electric signal, determining that the component in the target circuit module is an inductor.
Optionally, the reference value range is obtained by machine learning based on a test value of the qualified circuit board and/or an error value of the component.
Optionally, the circuit board detection device 500 further includes a numbering unit, configured to number the test items of the circuit board to be tested before the identifying the types of the components in the target circuit module of the circuit board to be tested.
The specific implementation and beneficial effects of each module in the circuit board detection device shown in fig. 5 may also correspond to corresponding descriptions of the method embodiments shown in fig. 2 and fig. 4, which are not repeated herein.
Referring to fig. 6, fig. 6 is a circuit board inspection device provided in an embodiment of the present application, and the circuit board inspection device 600 may be the circuit board inspection device 100 or a part of the circuit board inspection device 100 as described above, and the circuit board inspection device 600 includes a processor 610, a memory 620, and a communication interface 630, where the processor 610, the memory 620, and the communication interface 630 are connected to each other through a bus 640.
The processor 610 may be one or more central processing units (central processing unit, CPU), and in the case where the processor 610 is a CPU, the CPU may be a single-core CPU or a multi-core CPU.
The processor 610 in the circuit board detection device 600 is configured to read the computer program code stored in the memory 620, and perform the following operations:
identifying the types of components in a target circuit module of the circuit board to be tested;
opening a corresponding test channel according to the type of each component in the target circuit module so as to test each component in the target circuit module, wherein components of different types correspond to different test channels respectively;
reading a test value of each component in the target circuit module;
and comparing the test value of each component in the target circuit module with a corresponding reference value range to obtain a detection result of the target circuit module, wherein each test item of the circuit board to be detected is correspondingly provided with the reference value range.
Optionally, the identifying the type of the component in the target circuit module of the circuit board to be tested specifically includes:
transmitting a detection electric signal to a target circuit module of the circuit board to be detected;
acquiring a preset characteristic value of the target circuit module;
and determining the types of components in the target circuit module according to the preset characteristic value of the target circuit module.
Optionally, after the step of obtaining the preset characteristic value of the target circuit module is performed, further performing:
and if the preset characteristic value of the target circuit module is not obtained, checking whether the target circuit module is connected.
Optionally, the detected electrical signal is a sine wave signal with a fixed frequency, and the preset characteristic value is a voltage value; the determining the types of the components in the target circuit module according to the preset characteristic value of the target circuit module specifically comprises the following steps:
if the preset characteristic value is a fixed value, determining that components in the target circuit module are resistors;
and if the preset characteristic value rises in the preset time period, determining that the component in the target circuit module is a capacitor.
Optionally, the detected electrical signal is a variable-frequency sine wave signal, and the preset characteristic value is a resistance value; the determining the types of the components in the target circuit module according to the preset characteristic value of the target circuit module specifically comprises the following steps:
and if the preset characteristic value changes along with the frequency change of the detection electric signal, determining that the component in the target circuit module is an inductor.
Optionally, the reference value range is obtained by machine learning based on a test value of the qualified circuit board and/or an error value of the component.
Optionally, before performing the step of identifying the type of the component in the target circuit module of the circuit board to be tested, further performing: and numbering the test items of the circuit board to be tested.
The specific implementation and beneficial effects of each module in the circuit board detection device shown in fig. 6 may also correspond to corresponding descriptions of the method embodiments shown in fig. 2 and fig. 4, which are not repeated herein.
The embodiment of the invention also provides a computer readable storage medium which stores a computer program. The computer program implements the above-described method embodiments when executed by a processor.
Those of ordinary skill in the art will appreciate that implementing all or part of the above-described embodiment methods may be accomplished by a computer program in hardware associated with the computer program, which may be stored on a computer readable storage medium, which when executed may comprise the above-described embodiment methods. And the aforementioned storage medium includes: various media capable of storing computer program code, such as ROM or random access memory RAM, magnetic or optical disk.
The foregoing description of the preferred embodiments of the present invention should not be construed as limiting the scope of the invention, but rather should be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the following description and drawings or any application directly or indirectly to other relevant art(s).
Claims (10)
1. A method for inspecting a circuit board, comprising:
identifying the types of components in a target circuit module of the circuit board to be tested;
opening a corresponding test channel according to the type of each component in the target circuit module so as to test each component in the target circuit module, wherein components of different types correspond to different test channels respectively;
reading a test value of each component in the target circuit module;
and comparing the test value of each component in the target circuit module with a corresponding reference value range to obtain a detection result of the target circuit module, wherein each test item of the circuit board to be detected is correspondingly provided with the reference value range.
2. The circuit board inspection method according to claim 1, wherein the identifying the type of the component in the target circuit module of the circuit board to be inspected comprises:
transmitting a detection electric signal to a target circuit module of the circuit board to be detected;
acquiring a preset characteristic value of the target circuit module;
and determining the types of components in the target circuit module according to the preset characteristic value of the target circuit module.
3. The circuit board detection method according to claim 2, wherein after the obtaining the preset characteristic value of the target circuit module, further comprises:
and if the preset characteristic value of the target circuit module is not obtained, checking whether the target circuit module is connected.
4. The circuit board detection method according to claim 2, wherein the detection electric signal is a sine wave signal with a fixed frequency, and the preset characteristic value is a voltage value; the determining the type of the component in the target circuit module according to the preset characteristic value of the target circuit module includes:
if the preset characteristic value is a fixed value, determining that components in the target circuit module are resistors;
and if the preset characteristic value rises in the preset time period, determining that the component in the target circuit module is a capacitor.
5. The circuit board detection method according to claim 2, wherein the detection electric signal is a variable-frequency sine wave signal, and the preset characteristic value is a resistance value; the determining the type of the component in the target circuit module according to the preset characteristic value of the target circuit module includes:
and if the preset characteristic value changes along with the frequency change of the detection electric signal, determining that the component in the target circuit module is an inductor.
6. The circuit board inspection method according to any one of claims 1 to 5, wherein the reference value range is obtained by machine learning based on a test value of a qualified circuit board and/or an error value of a component.
7. The circuit board inspection method according to any one of claims 1 to 5, further comprising, before identifying the type of the component in the target circuit module of the circuit board to be inspected:
and numbering the test items of the circuit board to be tested.
8. A circuit board detection device, comprising:
the identification unit is used for identifying the types of components in the target circuit module of the circuit board to be tested;
the circuit board detection device comprises a test channel control unit and a circuit board detection device, wherein the test channel control unit is used for opening a corresponding test channel according to the type of each component in the target circuit module so as to test each component in the target circuit module, and the circuit board detection device is respectively provided with a plurality of test channels corresponding to components of different types;
the reading unit is used for reading the test value of each component in the target circuit module;
and the comparison unit is used for comparing the test value of each component in the target circuit module with a corresponding reference value range to obtain a detection result of the target circuit module, wherein each test item of the circuit board to be detected is correspondingly provided with the reference value range.
9. A circuit board inspection device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the circuit board inspection method of any one of claims 1-7 when executing the program.
10. A computer readable storage medium storing a computer program, wherein the computer program when executed by a processor implements the circuit board detection method according to any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211474758.XA CN116008773A (en) | 2022-11-23 | 2022-11-23 | Circuit board detection method, device and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211474758.XA CN116008773A (en) | 2022-11-23 | 2022-11-23 | Circuit board detection method, device and storage medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116008773A true CN116008773A (en) | 2023-04-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211474758.XA Pending CN116008773A (en) | 2022-11-23 | 2022-11-23 | Circuit board detection method, device and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116008773A (en) |
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2022
- 2022-11-23 CN CN202211474758.XA patent/CN116008773A/en active Pending
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