Circuit board detection equipment

Abstract

The embodiment of the utility model provides circuit board detection equipment. The circuit board detection equipment comprises a plurality of detection units, a voltage stabilizing module, a current display module and two detection contacts are arranged in each detection unit; the two detection contacts are used for being coupled with a detected circuit board, the positive electrode output end and the negative electrode output end of the voltage stabilizing module are respectively coupled with the two detection contacts and are used for supplying power to the detected circuit board, a detection loop is formed by the voltage stabilizing module and the detected circuit board, and the current display module is connected in the detection loop in series and is used for detecting and displaying power supply current of the detected circuit board. And more stable power supply voltage is provided for the detected circuit board through the voltage stabilizing module, so that the condition that the detected circuit board is damaged due to factors such as instantaneous high voltage or large-amplitude voltage fluctuation is avoided, and the detection accuracy is improved. In addition, a plurality of detection units correspond to a plurality of detection channels, so that a plurality of detected circuit boards can be detected at the same time, and the detection efficiency is improved; and voltage stabilizing modules with the same or different output voltages can be configured for the detection units according to detection requirements.

Description

Technical Field

[0001] This application relates to the field of circuit board testing technology, and in particular to a circuit board testing device. Background Technology

[0002] With the continuous development of technology, various electronic devices are emerging in an endless stream; the quality of electronic devices largely depends on the quality of their circuit boards. Therefore, circuit board testing is an important step in the circuit board production process or before it leaves the factory.

[0003] In actual production scenarios, in order to ensure the production efficiency and yield of circuit boards, it is imperative to improve the testing efficiency and reliability of circuit board testing equipment. Summary of the Invention

[0004] Some embodiments of this application provide a circuit board testing device to improve the testing efficiency and reliability of the circuit board testing device.

[0005] In some embodiments, the circuit board testing equipment includes:

[0006] Multiple detection units; each detection unit includes:

[0007] The first detection contact is used to couple with the positive power supply terminal of the circuit board under test;

[0008] The second detection contact is used to couple with the negative power supply terminal of the circuit board under test;

[0009] A voltage regulator module is used to adjust the received second DC voltage to a first DC voltage with a fluctuation range lower than a preset range; the positive output terminal of the voltage regulator module is coupled to the first detection contact; the first DC voltage is matched with the power supply voltage required by the circuit board under test;

[0010] A current display module is used to detect and display the power supply current of the circuit board under test; the current input terminal of the current detection module is coupled to the second detection contact, and the current output terminal of the current detection module is coupled to the negative output terminal of the voltage regulator module.

[0011] In the above embodiments, multiple detection units correspond to multiple detection channels, which can simultaneously detect multiple circuit boards under test, thereby improving detection efficiency. In addition, the voltage regulator module provides a more stable power supply voltage to the circuit board under test, avoiding damage to the circuit board under test due to factors such as instantaneous high voltage or large voltage fluctuations, thus improving detection accuracy. Furthermore, each detection unit can be configured with a voltage regulator module with the same or different output voltages to meet different detection requirements.

[0012] In some embodiments, the voltage regulator module includes an output voltage adjustable voltage regulator module.

[0013] In the above embodiments, by using an adjustable output voltage regulator module, the output voltage required by the current detection unit can be obtained without replacing the regulator module.

[0014] In some embodiments, the voltage regulator module includes a fixed output voltage regulator module; the fixed output voltage regulator module is coupled to the detection unit via a detachable connection component.

[0015] In the above embodiments, when a voltage regulator module with a fixed output voltage is used, it is coupled to the corresponding detection unit through a detachable connection component. This allows for convenient and quick replacement of voltage regulator modules with different output voltages according to detection requirements, thus meeting different detection needs.

[0016] In some embodiments, the circuit board testing device further includes: a carrier board; the testing unit is disposed on the surface of the carrier board;

[0017] The input and output terminals of the fixed output voltage regulator module are respectively provided with the first connector of the detachable connection assembly;

[0018] The carrier plate surface is provided with a second connector of the detachable connection assembly; the second connector matches the first connector to form a detachable connection.

[0019] The detachable connection component includes at least one of the following: bayonet connection component, threaded connection component, and magnetic connection component.

[0020] In the above embodiments, the two connectors constituting the detachable connection assembly are respectively connected to the relevant conductive lines or interfaces on the voltage regulator module and the carrier board. By connecting and disconnecting the two connectors, the voltage regulator module can be quickly connected to or disconnected from the detection unit, thereby enabling convenient and quick replacement of different voltage regulator modules to meet different detection requirements.

[0021] In some embodiments, the voltage regulator module includes:

[0022] Voltage regulator chip;

[0023] The light-emitting component is coupled to the output terminal of the voltage regulator chip;

[0024] The light-emitting component is used to emit light when the output voltage of the voltage regulator chip reaches the first DC voltage.

[0025] In the above embodiments, the core component of the voltage regulator module is a voltage regulator chip. The output terminal of the voltage regulator chip is also coupled to a light-emitting component. Relevant personnel can determine whether the voltage regulator module is outputting the corresponding voltage normally based on whether the light-emitting component emits light, which facilitates timely detection of abnormalities in each detection unit.

[0026] In some embodiments, when the voltage regulator module is an output voltage adjustable voltage regulator module, the voltage regulator module further includes:

[0027] A variable resistor is coupled to the output terminal of the voltage regulator chip;

[0028] The output voltage of the voltage regulator module varies with the resistance value of the variable resistor.

[0029] In the above embodiments, when the voltage regulator module adopts an adjustable output voltage regulator module, the output terminal of its voltage regulator chip is coupled with a variable resistor, so that the output voltage of the voltage regulator module can be adjusted by adjusting the resistance value of the variable resistor to meet different detection requirements.

[0030] In some embodiments, the current display module includes a first communication interface;

[0031] The current display module is coupled to the host computer through the first communication interface to output the power supply current detected by the current display module.

[0032] In the above embodiments, the current display module has a first communication interface, which can upload the detected power supply current of the circuit board under test to the host computer so that the host computer can store or further analyze and process it.

[0033] In some embodiments, the detection unit further includes: a step-down module;

[0034] The output terminal of the step-down module is coupled to the input terminal of the voltage regulator module and the power supply terminal of the current display module, respectively.

[0035] The step-down module is used to step down and adjust the received third DC voltage to the second DC voltage; the second DC voltage is matched with the power supply voltage required by the current display module.

[0036] In the above embodiments, a step-down module is set in each detection unit. The output voltage of each step-down module can be the same or different. This allows for the configuration of current display modules with different power supply voltages and voltage regulation modules with different input voltages in each detection unit, enabling different detection units to detect different types of circuit boards under test and making them suitable for various detection scenarios.

[0037] In some embodiments, the circuit board testing device further includes:

[0038] Power module; the power module is equipped with:

[0039] AC input terminal, used to receive AC voltage;

[0040] The DC output terminal is coupled to the input terminal of the step-down module in each of the detection units;

[0041] An AC-DC conversion module is coupled to the AC input terminal and the DC output terminal respectively, and is used to convert the AC voltage into the third DC voltage.

[0042] In the above embodiments, the power supply module is equipped with an AC-DC conversion module, which can receive AC voltage and convert it into DC voltage to provide power to each detection unit. This can not only meet the DC power supply requirements of each detection unit, but also match AC power for domestic or industrial use, eliminating the need to configure a separate DC power supply for the circuit board testing equipment.

[0043] In some embodiments, the power module further includes:

[0044] The second communication interface is used to receive switch signals sent by the host computer;

[0045] A switching device is connected in series between the AC input terminal and the AC-DC conversion module, or in series between the AC-DC conversion module and the DC output terminal; the switching device is used to respond to the switching signal to perform a closing action or a opening action.

[0046] In the above embodiments, a switching device and a second communication interface are provided in the voltage module. The switching signal is received through the second communication interface to control the operation of the switching device, thereby realizing the power supply control of the power module and the automated control of the circuit board testing equipment. That is, when the test starts, the host computer can send the corresponding switching signal to control the switching device to close, so that the power module outputs DC voltage to power each testing unit. When the test ends or the equipment malfunctions, the switching device can be controlled to open, so that the power module stops supplying power, ensuring power safety and energy saving. Attached Figure Description

[0047] To more clearly illustrate the implementation methods in some embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0048] Figure 1 This application illustrates application scenarios using various electronic devices as described in some embodiments.

[0049] Figure 2 A schematic diagram of the circuit board of the control device in some embodiments of this application is shown;

[0050] Figure 3 The following are schematic diagrams of the circuit board testing equipment in some embodiments of this application;

[0051] Figure 4 The following are schematic diagrams of the circuit board testing equipment in some embodiments of this application;

[0052] Figure 5 The following are schematic diagrams of the voltage regulator module in some embodiments of this application;

[0053] Figure 6 The following are schematic diagrams of the voltage regulator module in some embodiments of this application;

[0054] Figure 7 The following is a schematic diagram of the structure of a variable resistor applied to a voltage regulator module in some embodiments of this application;

[0055] Figure 8 The following are schematic diagrams of the circuit board testing equipment in some embodiments of this application;

[0056] Figure 9 The following are schematic diagrams of the circuit board testing equipment in some embodiments of this application;

[0057] Figure 10 The following are schematic diagrams of the power module structure in some embodiments of this application;

[0058] Figure 11 A schematic diagram of the power module structure is shown in some embodiments of this application. Detailed Implementation

[0059] To make the objectives and implementation methods of this application clearer, the exemplary implementation methods of this application will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments of this application. Obviously, the exemplary embodiments described are only some embodiments of this application, and not all embodiments.

[0060] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0061] The terms "first," "second," "third," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar or related objects or entities, and do not necessarily imply a specific order or sequence, unless otherwise specified. It should be understood that such terms are interchangeable where appropriate.

[0062] The terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device that includes a range of components is not necessarily limited to all of the components that are clearly listed, but may include other components that are not clearly listed or that are inherent to such product or device.

[0063] With the development of technology, various electronic devices are being used in people's daily lives and work. Figure 1 This is a schematic diagram illustrating an application scenario comprised of multiple electronic devices in some embodiments. For example... Figure 1 As shown, the user can operate the display device 20 through the smart device 30 or the control device 10.

[0064] In some embodiments, the control device 10 may be a remote control. Communication between the remote control and the display device 20 includes infrared protocol communication, Bluetooth protocol communication, and other short-range communication methods, controlling the display device 20 wirelessly or via wired means. The control device 10 can receive operation commands input by the user through buttons on the remote control, voice input, control panel input, etc., and convert the operation commands into commands that the display device 20 can recognize and respond to, thus acting as an intermediary for interaction between the user and the display device 20.

[0065] In some embodiments, the display device 20 can also be controlled using a smart device 30 (such as a mobile terminal, tablet computer, computer, laptop computer, etc.). For example, the display device 20 can be controlled using an application running on the smart device 30.

[0066] In some embodiments, the display device 20 can also be controlled in ways other than the control device 10 and the smart device 30. For example, it can directly receive user voice commands through a voice command acquisition module configured inside the display device 20, or it can receive user voice commands through a voice control device configured outside the display device 20, or it can receive user touch or gesture control operations through a touch module, motion sensing module, etc. configured inside the display device 20.

[0067] In some embodiments, the display device 20 also communicates with the server 40. The display device 20 may be allowed to communicate via a local area network (LAN), wireless local area network (WLAN), and other networks. The server 40 may provide various content and interactive features to the display device 20. The server 40 may be a cluster or multiple clusters, and may include one or more types of servers.

[0068] The aforementioned electronic devices, such as the control device 10, display device 20, intelligent device 30, and server 40, are all equipped with circuit boards, on which the chips or circuits required for the corresponding electronic devices to realize their respective functions are integrated.

[0069] Figure 2 An exemplary block diagram of the configuration of the circuit board 10' of the control device 10 is shown. (As follows) Figure 2As shown, the circuit board 10' of the control device 10 can integrate a controller 11, a memory 12, a communication interface 13, a user input / output interface 14, etc.

[0070] In some embodiments, the controller 11 may include a processor, random access memory (RAM), read-only memory (ROM), etc., to recognize and respond to operation commands; the memory 12 may store configuration data required by the controller 11 to recognize or respond to operation commands.

[0071] In some embodiments, the communication interface 13 may include a WIFI chip, a Bluetooth module, a Near Field Communication (NFC) module, etc., to provide rich interaction methods between the control device 10 and the display device 20.

[0072] In some embodiments, the user input / output interface 14 may include a microphone, touchpad, sensor, button, etc., to provide the user with a variety of operation methods. For example, the user can input operation commands through any of the microphone, touchpad, sensor, and button, and the user can also obtain operation feedback through sensors (such as vibration sensors).

[0073] In some embodiments, a power supply 15 may be integrated on the circuit board 10' of the control device 10, and the power supply 15 may be a rechargeable battery. In other embodiments, the power supply of the control device 10 may also be configured independently, for example, using a removable alkaline battery.

[0074] The performance of circuit boards in electronic devices directly affects the overall performance of the device and the user experience. Therefore, circuit board testing is a necessary step in the manufacturing process of related electronic devices.

[0075] For example, the standby current of the circuit board 10' of the control device 10 can be detected. If the standby current is not within the preset range, it indicates that the circuit board 10' is abnormal. For example, it may be that some components in the circuit board 10' are wired incorrectly, or there are abnormal points such as solder joints or cold solder joints.

[0076] In related technologies, when testing circuit boards, it is usually necessary for the tester to use a power meter. The power meter is connected to the circuit board under test. The power meter supplies power to the circuit board under test and collects and displays the voltage or current of the circuit board under test.

[0077] The aforementioned circuit board testing methods are labor-intensive and inefficient, making them unsuitable for the large-scale testing needs of circuit board production. Furthermore, power meters are expensive, making testing too costly for circuit boards in small electronic devices such as control units; moreover, incorrect power meter selection may damage the tested circuit board or result in poor testing accuracy.

[0078] To address the above problems, this application provides a circuit board testing device in some embodiments, which will be described in detail below with reference to the accompanying drawings.

[0079] Figure 3 This is a schematic diagram of the structure of a circuit board testing device provided in some embodiments of this application.

[0080] In some embodiments, as shown in FIG3, the circuit board testing device 100 includes a plurality of testing units 110; wherein each testing unit 110 can serve as a testing channel and be connected to a circuit board 200 under test, thereby enabling the circuit board testing device 100 to test multiple circuit boards 200 under test simultaneously, thereby improving testing efficiency.

[0081] In some embodiments, the circuit board testing device 100 further includes a power supply module 120, which is coupled to each testing unit 110 and is used to supply power to each testing unit 110.

[0082] In some embodiments, each detection unit 110 is provided with a first detection contact P1 and a second detection contact P2 as connection points to the corresponding circuit board 200 under test. The first detection contact P1 is used to couple to the positive power supply terminal of the circuit board 200 under test, and the second detection contact P2 is used to couple to the negative power supply terminal of the circuit board 200 under test.

[0083] For example, the positive power supply terminal and the negative power supply terminal of the circuit board under test 200 can be connected to the first detection contact P1 and the second detection contact P2 respectively through probes, so that the circuit board under test 200 and the corresponding detection unit 110 form a detection circuit.

[0084] In some embodiments, reference is made to Figure 3 The detection unit 110 includes a voltage regulator module 111.

[0085] The positive input terminal V of the voltage regulator module 111 in + and negative input terminal V in - Receives the second DC voltage V2; the positive output terminal of the voltage regulator module 111 V out + Coupled to the first detection contact P1, the negative output terminal V of the voltage regulator module 111 out - Coupled with the second detection contact P2.

[0086] The voltage regulator module 111 is configured to adjust the received second DC voltage V2 to a first DC voltage V1 with a fluctuation range within a preset range and then output it. The first DC voltage V1 matches the power supply voltage required by the circuit board 200 under test, and the fluctuation range of the first DC voltage V1 can be controlled within the preset range.

[0087] In the above embodiments, by setting a voltage regulator module 111 in each detection unit 110, a more stable power supply voltage can be provided to the circuit board 200 under test. This not only avoids damage to the circuit board 200 under test due to large fluctuations in the power supply voltage, but also improves the detection accuracy.

[0088] It should be noted that the maximum fluctuation range of the first DC voltage V1 output by the voltage regulator module 111, i.e. the aforementioned preset range, is related to factors such as the structure and configuration of the voltage regulator module. For example, it may be ±2% or ±1%. The appropriate voltage regulator module is selected based on the specific testing requirements, such as the required testing accuracy and the range of power supply voltage fluctuation that the circuit board under test can withstand.

[0089] In some embodiments, the circuit board testing device 100 may be provided with a common ground GND to provide a unified reference potential for each module in the device; the negative input terminal V of the voltage regulator module 111 in - and negative output terminal V out - Can be connected to the common ground GND separately.

[0090] In some embodiments, the detection unit 110 further includes a current display module 112.

[0091] The current display module 112 is connected in series in the detection circuit of the detection unit 110 to detect and display the power supply current of the corresponding circuit board 200 under test.

[0092] In some embodiments, such as Figure 3 As shown, the current display module 112 is connected in series to the negative output terminal V of the voltage regulator module 111. out - Between the current display module 112 and the second detection contact P2, that is: the current input terminal of the current display module 112 is coupled to the negative power supply terminal of the circuit board under test 200 through the second detection contact P2, and the current output terminal of the current display module 112 is coupled to the negative output terminal V of the voltage regulator module 111. out - Coupling.

[0093] The detection loop formed by each detection unit 110 and the circuit board under test 200 is that the voltage regulator module 111 in each detection unit 110 acts as the "power supply", and the corresponding circuit board under test 200 acts as the "load". The current in this detection loop is the power supply current of the circuit board under test 200, which is also the current that the current display module 112 needs to detect and display.

[0094] Figure 3 The arrows in the diagram indicate the current flow in the detection circuit: the current flows out from the positive output terminal of the voltage regulator module 111, flows into the circuit board under test 200 through the positive power supply terminal of the circuit board under test 200, then flows out from the negative power supply terminal of the circuit board under test 200, and flows back to the negative output terminal of the voltage regulator module 111 through the current display module 112.

[0095] like Figure 3 In the embodiment shown, the current display module 112 is positioned on the path from the circuit board under test 200 back to the voltage regulator module 111 (i.e. from the "load" back to the "power supply"), and can accurately detect the current value flowing through the circuit board under test 200.

[0096] in addition, Figure 3 The wiring method of the current display module 112 shown also makes the wiring design of the entire circuit board testing equipment 100 more flexible. For example, the current output terminal of the current display module 112 and the negative output of the voltage regulator module 111 can be connected separately to the common ground GND of the circuit board testing equipment instead of being directly connected, which can achieve the same effect as the two being directly connected.

[0097] In other embodiments, the current display module 112 may also be located at the positive output terminal V of the voltage regulator module 111. out The positive output terminal V of the voltage regulator module 111 is located between the + and the first detection contact P1. out The path between the + and the positive power supply terminal of the circuit board under test 200, that is, the path from the voltage regulator module 111 into the circuit board under test 200 (i.e. from the "power supply" into the "load").

[0098] In some embodiments, the current display module 112 integrates a sampling circuit, a microcontroller, and a display module; wherein, the sampling circuit is used to collect the current or corresponding voltage to be detected, the microcontroller processes the current or voltage (analog signal) collected by the sampling circuit into the corresponding digital signal form of the current value, i.e. the detection result, and provides the detection result to the display module for display.

[0099] For example, the display module in the current display module 112 can be a digital tube display module, an LCD display module, etc.

[0100] In some embodiments, the current display module 112 is provided with a first communication interface; the current display module 112 can be coupled to a host computer through the first communication interface.

[0101] For example, the first communication interface can be a serial communication interface, such as RS485, RS232, etc.

[0102] The detection results processed by the microcontroller in the current display module 112 can be displayed through the display module so that relevant personnel can view the detection results of the circuit board under test in a timely manner. On the other hand, they can also be output to the host computer through the first communication interface so that the host computer can store or further process the detection results.

[0103] In some embodiments, in addition to the current display module 112, other detection modules, such as voltage detection modules and communication detection modules, may be provided in each detection unit 110 to meet different detection requirements.

[0104] In some embodiments, the voltage regulator module 111 may be an adjustable output voltage regulator module, thereby meeting the power supply requirements of different types of circuit boards 200 under test.

[0105] In some embodiments, the voltage regulator module 111 may be a fixed-output-voltage regulator module. In this case, the fixed-output-voltage regulator module can be coupled to the detection unit 110 via a detachable connection component, thereby allowing different voltage regulator modules 111 to be installed in the corresponding detection unit 110 according to different types of circuit boards 200 under test.

[0106] For example, the detachable connection component described above includes at least one of the following: bayonet connection component, threaded connection component, and magnetic connection component.

[0107] Any detachable connection assembly may include a first connector and a second connector that are mutually matched and detachable. Taking a threaded connection assembly as an example, it consists of a connector with external threads and a connector with corresponding internal threads. Either of these two connectors can serve as the first connector, and the other as the second connector.

[0108] In some embodiments, such as Figure 4 As shown, the circuit board testing equipment 100 includes a carrier board 130, a power module 120, a voltage regulator module 111 in each testing unit 110, a current display module 112, etc., all of which are disposed on the surface of the carrier board 130.

[0109] In some embodiments, metal lines can be formed on the surface of the carrier board 130 through processes such as printing and electroplating, serving as conductive lines between different modules. In other embodiments, the conductive lines between different modules can be partially or entirely in the form of flying wires, facilitating the adjustment of the circuit structure of the circuit board testing equipment 100 according to testing requirements.

[0110] The first connector of the aforementioned detachable connection assembly can be fixedly connected to the external port (such as V) of the voltage regulator module 111. in +、V in -、V out +、Vout -), the second connector can be fixed to the surface of the carrier plate 130 and connected to other ports or conductive lines to be connected to the external port mentioned above.

[0111] For example, such as Figure 4 As shown, for each voltage regulator module 111, four sets of detachable connection components can be set:

[0112] The positive input terminal V of the voltage regulator module 111 in +The first connector L11 is fixedly connected; the corresponding detection unit 110 is provided with a second connector L12, which is connected to the positive conductive line that provides the second DC voltage V2; the first connector L11 and the second connector L12 are matched to form a first set of detachable connection components;

[0113] The negative input terminal V of the voltage regulator module 111 in - The first connector L21 is fixedly connected; the corresponding detection unit 110 is provided with a second connector L22, which is connected to the negative conductive line that provides the second DC voltage V2; the first connector L21 and the second connector L22 are matched to form a second set of detachable connection components;

[0114] The positive output terminal V of the voltage regulator module 111 out +The first connector L31 is fixedly connected; the corresponding detection unit 110 is provided with a second connector L32, which is connected to the conductive line connecting the first detection contact P1; the first connector L31 and the second connector L32 match to form a third set of detachable connection components;

[0115] The negative output terminal V of voltage regulator module 111 out - The first connector L41 is fixedly connected; the corresponding detection unit 110 is provided with a second connector L42, which is connected to the conductive line of the current output terminal of the current display module 112; the first connector L41 and the second connector L42 are matched to form a fourth set of detachable connection components.

[0116] When a certain voltage regulator module needs to be connected to the detection unit 110, simply connect the four first connectors L11, L21, L31 and L41 of the voltage regulator module 111 to the four second connectors L12, L22, L32 and L42 in the detection unit 110. When a different voltage regulator module needs to be replaced, simply separate the connected first and second connectors to quickly remove the current voltage regulator module from the detection unit 110.

[0117] It should be noted that other modules in the circuit board testing equipment 100, such as the power supply module 120 and the current display module 112, can also be replaced as needed based on the above-mentioned detachable connection components to meet the current detection requirements of different types of circuit boards under test.

[0118] In some embodiments, the voltage regulator module 111 can be obtained by integrating a voltage regulator chip and related peripheral circuits; based on different voltage regulator chips, the voltage regulator module 111 can have different performance, such as different input voltage ranges, different output voltages, and different output voltage fluctuation ranges.

[0119] The aforementioned voltage regulator chips can be AMS1117 chips, LD1117 series chips, LM78 series chips, etc.

[0120] In some embodiments, such as Figure 5 As shown, the voltage regulator chip used is the AMS1117 chip. Pin 1 of the AMS1117 chip is the ground pin, pin 2 is the output pin, and pin 3 is the input pin; its peripheral circuit includes an input filter capacitor and an output filter capacitor.

[0121] The input filter capacitor filters out high-frequency noise and ripple interference signals from the input voltage of the voltage regulator chip. When these interference signals are present in the input voltage of the voltage regulator chip, the input filter capacitor absorbs and stores the energy of the interference signals, thereby reducing the impact of the interference signals on the output voltage of the voltage regulator chip. By selecting a suitable filter capacitor, the stability and purity of the output voltage of the voltage regulator chip can be effectively improved.

[0122] Output filter capacitors can smooth the output voltage of the voltage regulator chip and reduce output voltage ripple and noise. When the load connected to the output of the voltage regulator chip changes, the output filter capacitor can quickly release or absorb energy to maintain the stability of the output voltage and improve the performance of related circuits.

[0123] In some embodiments, such as Figure 5 As shown, the input filter capacitors of the AMS1117 chip may include capacitors C1 and C2, and the output filter capacitors may include capacitors C3 and C4.

[0124] For example, capacitor C1 can be a non-polarized capacitor with a capacitance of 1000uF, and its two plates are connected to pin 3 of the AMS1117 chip and ground GND respectively.

[0125] For example, capacitor C2 can be a polarized capacitor with a capacitance of 10uF, with its positive plate connected to pin 3 of the AMS1117 chip and its negative plate grounded to GND.

[0126] For example, capacitor C3 can be a polarized capacitor with a capacitance of 10uF, with its positive plate connected to pin 2 of the AMS1117 chip and its negative plate grounded to GND.

[0127] For example, capacitor C4 can be a non-polarized capacitor with a capacitance of 1000uF, with its two plates connected to pin 2 of the AMS1117 chip and ground GND, respectively.

[0128] Figure 5 The voltage regulator module 111 shown is a fixed output voltage regulator module. Pin 1 of the AMS1117 chip is used as a ground pin, that is, the ground plates of the above capacitors can be connected to pin 1.

[0129] Figure 5 The output voltage of the voltage regulator module 111 shown is determined by the output voltage of the AMS1117 chip. By integrating different AMS1117 chips, the voltage regulator module 111 can have different output voltages, such as 1.2V, 1.5V, 1.8V, 2.5V, 2.85V, 3.0V, 3.3V, and 5.0V. Furthermore, combined with the detachable connection components described above, voltage regulator modules with corresponding output voltages can be conveniently and quickly connected to the testing unit 110 according to the testing requirements of the circuit board 200 under test.

[0130] In some embodiments, the output terminal of the voltage regulator module 111 is also connected in parallel with a light-emitting component. The light-emitting component emits light when the output voltage of the voltage regulator chip reaches a preset voltage (i.e., the first DC voltage V1), which is used to indicate whether the corresponding detection unit 110 is normal, so that relevant personnel can troubleshoot in a timely manner.

[0131] In other words, when the circuit board testing device 100 is powered on but the light-emitting component does not emit light, it indicates that the corresponding testing unit 110 is abnormal. For example, there may be abnormalities such as loose connection of conductive wire or failure of voltage regulator chip in the corresponding testing unit 110.

[0132] For example, refer to Figure 5 The light-emitting component may include a light-emitting diode D1 and a resistor R0; the anode of the light-emitting diode D1 is connected to pin 2 of the AMS1117 chip, the cathode is connected to one end of the resistor R0, and the other end of the resistor R0 is grounded to GND.

[0133] In other embodiments, an adjustable output voltage regulator module can also be formed based on a voltage regulator chip such as the AMS1117 chip, for example... Figure 6 As shown.

[0134] Reference Figure 6 In the voltage regulator module 111, pin 1 of the AMS1117 chip is used as an adjustable pin. In addition to the aforementioned input filter capacitor, output filter capacitor, and light-emitting component, the peripheral circuit also includes a fixed resistor R1 and a variable resistor R2. The two ends of the fixed resistor R1 are connected to pins 2 and 1 of the AMS1117 chip, respectively. One end of the variable resistor R2 is connected to pin 1, and the other end is grounded (GND).

[0135] Figure 6 In the voltage regulator module 111 shown, the voltage directly output by the AMS1117 chip, i.e., the voltage between pin 2 and pin 1, is used as the reference voltage V. ref The current flowing out of pin 1 is denoted as I. adj The output voltage V of the voltage regulator module 111 is... out The calculation formula is:

[0136] V out =V ref *(1+R2 / R1)+I adj *R2.

[0137] For a specific AMS1117 chip, the reference voltage V ref It can also be determined that V ref It can be considered a constant; for example, for some AMS1117 chips, V ref It is configured to 1.25V.

[0138] In addition, the current I flowing out of pin 1 adj It is very small and constant, and can be ignored when the accuracy of the output voltage is not critical.

[0139] According to the above calculation formula, the output voltage V of the voltage regulator module can be increased by increasing the resistance value of the variable resistor R2. out .

[0140] In some embodiments, Figure 6 The voltage regulator module shown can adjust the output voltage from 1.25V to 13.8V.

[0141] In some embodiments, the variable resistor R2 can be implemented by connecting multiple fixed resistors in series and parallel. Figure 7 A schematic diagram of a variable resistor R2 provided in some embodiments is shown. (Refer to...) Figure 7 The variable resistor R2 includes a base resistor R20, multiple parallel resistors R21, and multiple series resistors R22.

[0142] like Figure 7 As shown, the first terminal of the parallel resistor R21 is connected to the first terminal of the base resistor R20 via the parallel switch S1; the second terminal of the parallel resistor R21 is connected to the second terminal of the base resistor R20. When the parallel switch S1 is closed, the parallel resistor R21 connected to the switch S1 is connected in parallel with the base resistor R20. The first terminal of the base resistor R20 can be used as the first terminal of the variable resistor R2, and... Figure 6 Pin 2 of the AMS1117 chip is shown connected.

[0143] In some embodiments, the resistance values ​​of the parallel resistors R21 may be the same or different.

[0144] like Figure 7 As shown, multiple series resistors R22 are connected in series to the second terminal of the base resistor R20, and a series switch S2 is also provided between adjacent resistors. Specifically, the second terminal of the base resistor R20 is connected to the common terminal a1 of the first series switch S2, and the switching terminal c1 of the first series switch S2 is connected to the first terminal of the first series resistor R22; the second terminal of the first series resistor R22 is connected to the common terminal a2 of the second series switch S2, and the switching terminal c2 of the second series switch S2 is connected to the first terminal of the second series resistor R22; ... the second terminal of the last series resistor R22 serves as the second terminal of the variable resistor R2; the other switching terminals b1, b2, etc. of each series switch are all connected to the second terminal of the variable resistor R2.

[0145] Based on such Figure 7 The variable resistor R2 shown can be controlled by controlling each parallel switch S1 and series switch S2. This allows control over the number of parallel resistors R21 connected in parallel with the base resistor R20, as well as the number of series resistors R22 connected in series with the base resistor R20, thereby adjusting the resistance between the first and second terminals of the variable resistor R2.

[0146] For example, the more parallel switches S1 that are in the closed state, the more parallel resistors R21 that are connected in parallel with the base resistor R20, the smaller the resistance between the first and second terminals of the variable resistor R2.

[0147] For example, when the common terminal a1 and switching terminal b1 of the first series switch S2 are connected and the remaining series switches S2 are all open, the second end of the base resistor R20 is directly connected to the second end of the variable resistor R2, that is, the number of series resistors R22 connected between the second end of the base resistor R20 and the second end of the variable resistor R2 is 0.

[0148] With the common terminal a1 and switching terminal c1 of the first series switch S2 connected, the common terminal a1 and switching terminal b1 of the second series switch S2 connected, and the remaining series switches S2 all disconnected, the first series resistor R22 is connected in series between the second end of the base resistor R20 and the second end of the variable resistor R2. That is, the number of series resistors R22 connected between the second end of the base resistor R20 and the second end of the variable resistor R2 is 1.

[0149] Similarly, the more series resistors R22 connected between the second terminal of the base resistor R20 and the second terminal of the variable resistor R2, the greater the resistance between the first and second terminals of the variable resistor R2.

[0150] In some embodiments, when applied to Figure 6 In the case of the voltage regulator module shown, Figure 7 One end of the variable resistor R2 is connected to pin 2 of the AMS1117 chip, and the other end is grounded.

[0151] In some embodiments, such as Figure 8 As shown, the power supply module 120 can be directly coupled to the voltage regulator module 111 and the current display module 112 in each detection unit 110 to supply power to the voltage regulator module 111 and the current display module 112. That is, the second DC voltage V2 received by the voltage regulator module 111 in each detection unit 110 is the same as the third DC voltage V3 output by the power supply module 120.

[0152] In some embodiments, such as Figure 9 As shown, the detection unit 110 may further include a step-down module 113, and the power supply module 120 can be coupled to the voltage regulator module 111 and the current display module 112 in the corresponding detection unit 110 through the step-down module 113. That is, in each detection unit 110, the input terminal of the step-down module 113 is coupled to the output terminal of the power supply module 120, and the output terminal of the step-down module 113 is coupled to the voltage regulator module 111 and the current display module 112 in the corresponding detection unit 110, respectively.

[0153] The step-down module 113 is configured to adjust the third DC voltage V3 output by the power supply module 120 to the second DC voltage V2 required by the corresponding detection unit 110.

[0154] In some embodiments, the DC voltage directly output by the power supply module 120 is high, exceeding the maximum allowable input voltage of the voltage regulator module 111. Therefore, the DC voltage directly output by the power supply module 120 can be reduced to the allowable input voltage range of the voltage regulator module 111 by the step-down module 113.

[0155] The input voltage of the step-down module 113 in different detection units 110 is the same, which is the output voltage of the power supply module 120, namely the third DC voltage V3; the output voltage of the step-down module 113 in different detection units 110, namely the second DC voltage V2, can be the same or different.

[0156] Since the input voltage of the voltage regulator module 111 can be any voltage value within a certain range (such as 3V to 8V), the output voltage of the buck module 113 can preferentially match the power supply voltage required by the current display module 112 in the corresponding detection unit 110.

[0157] In the above embodiments, a price reduction module 113 is provided in each detection unit 110, which can adjust the third DC voltage output by the voltage module 120 to a second DC voltage that matches other modules in the detection unit, so as to meet the detection requirements of the circuit board 200 under test corresponding to each detection unit. This allows the circuit board detection equipment 100 to detect multiple identical or different types of circuit boards under test at the same time, and is suitable for different detection scenarios.

[0158] In some embodiments, the input voltage of the power module 120 can be a DC voltage. In other embodiments, the input voltage of the power module 120 can also be an AC voltage.

[0159] In some embodiments, such as Figure 10 As shown, the power module 120 in the circuit board testing equipment 100 is provided with an AC input terminal 121, a DC output terminal 122, and an AC-DC conversion module 123. The AC side of the AC-DC conversion module 123 is coupled to the AC input terminal 121, and the DC side is coupled to the DC output terminal 122.

[0160] Among them, the AC input terminal 121 can receive common AC voltages such as 220V residential voltage and 380V industrial voltage.

[0161] The DC output terminal 122 is coupled to each detection unit 110; for example, for Figure 8 The circuit board testing device 100 shown has its DC output terminal 122 coupled to the input terminal of the voltage regulator module 111 in each testing unit 110. Figure 9 The circuit board testing device 100 shown has a DC output terminal 122 that is coupled to the input terminal of the step-down module 113 in each testing unit 110.

[0162] The AC-DC conversion module 123 can convert the AC voltage received at the AC input terminal 121 into a DC voltage, namely the third DC voltage V3 mentioned above, and finally output it through the DC output terminal 122 to power each detection unit 110.

[0163] In some embodiments, the power module 120 is further provided with a switching device 124 and a second communication interface 125.

[0164] In some embodiments, the switching device 124 is coupled to both the AC input terminal 121 and the AC / DC conversion module 123, such as... Figure 10 As shown. In other embodiments, the switching device 124 can also be connected in series between the AC / DC conversion module 123 and the DC output terminal 122, such as... Figure 11 As shown.

[0165] The second communication interface 125 is coupled to the switching device 124. The second communication interface 125 can receive the switching signal sent by the host computer and send it to the switching device 124; the switching device 124 responds to the switching signal and performs a closing action or a opening action, thereby connecting or disconnecting the AC input terminal 121 and the DC output terminal 122.

[0166] In some embodiments, the second communication interface 125 may be a General-Purpose Interface Bus (GPIB) interface.

[0167] In other words, the host computer can send a switch signal to the power module 120 in the circuit board testing equipment 100 through the second communication interface 125 to control the power module 120 to start or stop power supply, thereby realizing automated control and remote control of the circuit board testing equipment 100, thereby improving the automation level of the circuit board testing process and improving testing efficiency.

[0168] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0169] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the described embodiments and various different variations of embodiments suitable for specific use considerations.

Claims

1. A circuit board testing device, characterized in that, include: Multiple detection units; Each of the detection units includes: The first detection contact is used to couple with the positive power supply terminal of the circuit board under test; The second detection contact is used to couple with the negative power supply terminal of the circuit board under test; A voltage regulator module is used to adjust the received second DC voltage to a first DC voltage with a fluctuation range lower than a preset range; the positive output terminal of the voltage regulator module is coupled to the first detection contact; the first DC voltage is matched with the power supply voltage required by the circuit board under test; A current display module is used to detect and display the power supply current of the circuit board under test; the current input terminal of the current display module is coupled to the second detection contact, and the current output terminal of the current display module is coupled to the negative output terminal of the voltage regulator module.

2. The circuit board testing equipment according to claim 1, characterized in that, The voltage regulator module includes an adjustable output voltage regulator module.

3. The circuit board testing equipment according to claim 1, characterized in that, The voltage regulator module includes a fixed output voltage regulator module; the fixed output voltage regulator module is coupled to the detection unit via a detachable connection component.

4. The circuit board testing equipment according to claim 3, characterized in that, Also includes: Carrier plate; The detection unit is disposed on the surface of the carrier plate; The input and output terminals of the fixed output voltage regulator module are respectively provided with the first connector of the detachable connection component; The carrier plate surface is provided with a second connector of the detachable connection assembly; the second connector matches the first connector to form a detachable connection. The detachable connection component includes at least one of the following: bayonet connection component, threaded connection component, and magnetic connection component.

5. The circuit board testing equipment according to claim 1, characterized in that, The voltage regulator module includes: A voltage regulator chip; the output terminal of the voltage regulator chip is coupled to the first detection contact and the second detection contact respectively. The input terminal of the voltage regulator chip is used to receive the second DC voltage, and the output terminal of the voltage regulator chip is used to output the first DC voltage; The light-emitting component is coupled to the output terminal of the voltage regulator chip; The light-emitting component is used to emit light when the output voltage of the voltage regulator chip reaches the first DC voltage.

6. The circuit board testing equipment according to claim 5, characterized in that, When the voltage regulator module is an adjustable output voltage regulator module, the voltage regulator module further includes: A variable resistor is coupled to the output terminal of the voltage regulator chip; The output voltage of the voltage regulator module varies with the resistance value of the variable resistor.

7. The circuit board testing equipment according to claim 1, characterized in that, The current display module includes a first communication interface; The current display module is coupled to the host computer through the first communication interface to output the power supply current detected by the current display module.

8. The circuit board testing equipment according to claim 1, characterized in that, The detection unit further includes: a voltage reduction module; The output terminal of the step-down module is coupled to the input terminal of the voltage regulator module and the power supply terminal of the current display module, respectively. The step-down module is used to step down and adjust the received third DC voltage to the second DC voltage; the second DC voltage is matched with the power supply voltage required by the current display module.

9. The circuit board testing equipment according to claim 8, characterized in that, Also includes: Power module; The power module is equipped with: AC input terminal, used to receive AC voltage; The DC output terminal is coupled to the input terminal of the step-down module in each of the detection units; An AC-DC conversion module is coupled to the AC input terminal and the DC output terminal respectively, and is used to convert the AC voltage into the third DC voltage.

10. The circuit board testing equipment according to claim 9, characterized in that, The power module is also equipped with: The second communication interface is used to receive switch signals sent by the host computer; A switching device is connected in series between the AC input terminal and the AC-DC conversion module, or in series between the AC-DC conversion module and the DC output terminal; the switching device is used to respond to the switching signal to perform a closing action or a opening action.

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