Power supply control device for infrared imaging maintenance detection of circuit board

Abstract

The application provides a power supply control device for infrared imaging maintenance detection of a circuit board, comprising: a shell, an interface hole being formed on the front face; a main control circuit board, arranged in the shell, the main control circuit board being integrated with a level inversion circuit, the level inversion circuit generating a square wave pulse signal of a preset frequency in response to a pulse trigger signal; a physical switch, penetrating through the interface hole on the front face of the shell, electrically connected with a key trigger pin of the main control circuit board, used for generating the pulse trigger signal by pressing; and a power supply output interface, leading out positive and negative lead wires from a power supply output end of the main control circuit board, used for detachably connecting to a to-be-tested circuit board to be thermally imaged. The application solves the problem of dependence on an upper computer, and significantly improves the efficiency and convenience of circuit board maintenance detection.

Description

Technical Field

[0001] This invention relates to the field of circuit board fault detection technology, and more specifically to a power control device for infrared imaging repair and inspection of circuit boards. Background Technology

[0002] When repairing digital products, a test power supply is usually used to power on the digital products to test the circuit board and determine the fault condition. In some scenarios, thermal imaging devices are also needed to detect abnormal temperature areas on the printed circuit board and to find the components with abnormal temperatures by referring to the schematic diagram of the printed circuit board.

[0003] Current circuit board power supply detection mainly relies on a host computer system (such as a PC control console + DC power supply + ammeter + thermal imager), which uses software to configure parameters to achieve intermittent power supply. For example, users need to set the on / off frequency, voltage level, and simultaneously trigger multiple devices. This intermittent power supply can visually identify areas of abnormal temperature, but because the implementation of this solution depends on the host computer system, it has the following three major drawbacks:

[0004] 1. The operation is complex, requiring software debugging, interconnection of multiple devices, and parameter settings, which is time-consuming and relies on professional skills;

[0005] 2. The on-site debugging is rigid, with multiple discrete devices fixed in place. Users need to complete the power parameter configuration on the computer, and their hands are tied in front of the fixed PC, which cannot meet the needs of maintenance personnel for on-site mobile inspection.

[0006] 3. Risk of dependence on host computer: The host computer must be kept online. If the host computer fails, the entire detection system will be paralyzed.

[0007] Therefore, while retaining the thermal imaging linkage detection, how to separate the power controller from the host computer has become an urgent technical problem to be solved. Summary of the Invention

[0008] Based on the above situation, the main objective of this invention is to provide a power control device for infrared imaging repair and inspection of circuit boards, so as to separate the power controller from the host computer while retaining the thermal imaging linkage detection.

[0009] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0010] This invention provides a power control device for infrared imaging repair and inspection of circuit boards, comprising:

[0011] The housing has interface holes on the front.

[0012] The main control circuit board is located inside the housing. The main control circuit board integrates a level switching circuit, which generates a square wave pulse signal of a preset frequency in response to the pulse trigger signal.

[0013] The physical switch passes through the interface hole on the front of the housing and is electrically connected to the button trigger pin of the main control circuit board. It is used to generate a pulse trigger signal when pressed.

[0014] The power output interface has positive and negative wires leading out from the power output terminal of the main control circuit board, which can be detachably connected to the circuit board under test for thermal imaging.

[0015] Optionally, the power output interface includes at least two interfaces with different output voltages, or the power output interface includes at least two interfaces with different connectors.

[0016] Optionally, an external power supply cable can be connected to the power output interface to provide power to the circuit board under test.

[0017] Optionally, it also includes:

[0018] The power supply cable has one end fixedly connected to the power output interface, and the other end is used to connect to the circuit board under test.

[0019] Optionally, it also includes:

[0020] Indicator lights, located on the front of the housing, are electrically connected to the main control circuit board and are used to indicate the operating status of the power control device.

[0021] Optionally, the indicator light is used to flash at preset time intervals after the physical switch is pressed.

[0022] Optionally, the indicator light and the physical switch are located on opposite sides of the housing; or, the indicator light is arranged around the physical switch.

[0023] Optionally, a cover plate is provided on the front of the housing, and the cover plate has multiple through holes;

[0024] The cover plate covers the indicator lights and physical switches.

[0025] Optionally, it also includes:

[0026] The power input interface can be disconnected from the power output interface via the main control circuit board.

[0027] The power input interface receives external power through a power cord to supply power to the power output interface.

[0028] Optionally, it also includes:

[0029] The battery, housed inside the casing, can be disconnected from the power output interface via the main control circuit board and is used to provide power to the power output interface.

[0030] Beneficial effects:

[0031] According to an embodiment of the present invention, a power control device for infrared imaging repair and inspection of circuit boards is disclosed. During the infrared thermal imaging process of the circuit board under test, a pulse trigger signal is directly generated through a physical switch. The level-flipping circuit on the main control circuit board responds and outputs a square wave pulse signal of a preset frequency. Operation requires no software debugging or parameter setting. The user only needs to press once to start the power control, solving the pain point of relying on host computer software to configure multiple device parameters in the prior art, simplifying the traditional operation process of more than 30 seconds to less than 1 second. In addition, the compact design around the housing allows maintenance personnel to hold the device with one hand to press the switch and freely adjust the position of the circuit board under test with the other hand, thus overcoming the rigidity problem of hands being restricted, making the device suitable for on-site mobile repair, especially convenient for operation in narrow spaces or when quickly locating thermal imaging anomalies. The entire process is controlled by hardware links (physical switch → level-flipping circuit → output interface), independent of the host computer system, avoiding detection interruption due to PC failure. It can be seen that through a highly integrated portable design, the host computer dependency problem in the prior art is completely solved, while significantly improving the efficiency and convenience of circuit board repair and inspection.

[0032] Other beneficial effects of the present invention will be explained in detail through the introduction of specific technical features and technical solutions in specific embodiments. Those skilled in the art should be able to understand the beneficial technical effects brought about by these technical features and technical solutions through the introduction of these technical features and technical solutions. Attached Figure Description

[0033] The embodiments of the present invention will now be described with reference to the accompanying drawings. In the drawings:

[0034] Figure 1 This is a schematic diagram of a power control device for infrared imaging repair and inspection of circuit boards disclosed in this embodiment;

[0035] Figure 2 This is a schematic diagram of another power control device for infrared imaging repair and inspection of circuit boards disclosed in this embodiment;

[0036] Figure 3 This is a schematic diagram of an external power supply line structure disclosed in this embodiment;

[0037] Figure 4 This is a schematic diagram of another power control device for infrared imaging repair and inspection of circuit boards disclosed in this embodiment;

[0038] Figure 5 for Figure 4 A side-view 3D diagram after removing power supply cable 30;

[0039] Figure 6 for Figure 2 A three-dimensional diagram from another perspective. Detailed Implementation

[0040] The present invention is described below based on embodiments, but the present invention is not limited to these embodiments. In the following detailed description of the present invention, some specific details are described in detail, but well-known methods, processes, procedures, and elements are not described in detail in order to avoid obscuring the essence of the present invention.

[0041] Furthermore, those skilled in the art should understand that the accompanying drawings provided herein are for illustrative purposes only and are not necessarily drawn to scale.

[0042] Unless the context explicitly requires it, the words "comprising," "including," and similar terms throughout the specification and claims should be interpreted as encompassing rather than being exclusive or exhaustive; that is, meaning "including but not limited to."

[0043] In the description of this invention, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0044] To separate the power controller from the host computer while retaining the thermal imaging-linked detection capability, this embodiment discloses a power control device for infrared imaging repair and inspection of circuit boards. Please refer to [link / reference]. Figure 1 , Figure 1 This is a schematic diagram of a power control device for infrared imaging repair and inspection of circuit boards disclosed in this embodiment. The power control device for infrared imaging repair and inspection of circuit boards includes: a housing 1, a main control circuit board (not shown in the attached drawings), a physical switch 2, and a power output interface 3, wherein:

[0045] Interface holes are provided on the front of the housing 1. In specific implementations, the housing 1 can be rectangular or circular, etc., and its size is such that maintenance personnel can hold it with one hand. In this embodiment, the interface holes on the front are used for installing components.

[0046] The main control circuit board is housed within the casing 1. Integrated on the main control circuit board is a level-flipping circuit that generates a square wave pulse signal of a preset frequency in response to a pulse trigger signal. Specifically, the level-flipping circuit can be implemented using existing circuitry. When the pulse trigger signal arrives, the level-flipping circuit generates a square wave pulse, thereby enabling the power control device to switch between power-on and power-off intermittent power supply modes at a preset frequency. When the circuit board under test is being thermally imaged using infrared imaging, the thermal imaging device performs thermal imaging at the on / off frequency. When a temperature anomaly exists at a certain point, a flashing red bright spot will appear in the thermal image, allowing the user to quickly and intuitively locate the temperature anomaly area. For the circuit board under test, when the temperature anomaly area is small, it is difficult to detect the color anomaly area in a static thermal imaging image. In this embodiment, by operating the power control device in an intermittent power supply mode, the thermal imaging device performs thermal imaging at the on / off frequency. Therefore, when a color anomaly area exists, it will exhibit a "flashing" effect with alternating bright and dark areas, allowing the user to quickly and intuitively locate the temperature anomaly area. In the specific implementation process, the preset frequency should be the infrared imaging "flickering" frequency that can be observed by the human eye, that is, the preset frequency is equal to the light spot flickering frequency that can be observed by the human eye.

[0047] Physical switch 2 passes through the interface hole on the front of the housing and is electrically connected to the button trigger pin of the main control circuit board for generating a pulse trigger signal when pressed. Specifically, physical switch 2 passes through the interface hole on the front of the housing, and the internal microswitch is soldered to the main control circuit board. In actual implementation, pressing physical switch 2 can generate, for example, a high-level pulse trigger signal.

[0048] To maintain the continuity of the square wave pulse, in an optional embodiment, the level-flipping circuit continuously generates a square wave pulse when the current pulse trigger signal is received, and stops generating the square wave pulse when the next pulse trigger signal arrives. That is, when physical switch 2 is pressed, it continuously outputs a square wave pulse; when physical switch 2 is pressed again, it stops outputting the square wave pulse. This facilitates operation by maintenance personnel.

[0049] Power output interface 3 has positive and negative wires leading from the power output terminal of the main control circuit board for detachable connection to the circuit board under test for thermal imaging. In this embodiment, power output interface 3 can be detachably connected to an external power supply line or fixedly connected to a power supply line. The output voltage of power output interface 3 can be, for example, 3.3V, 5V, or other voltages, or multiple power output interfaces 3 can be integrated to output different voltages. In specific implementation, the voltage source of power output interface 3 can be the power supply built into the power control device or an external power supply connected to the power control device.

[0050] To achieve functional expandability, in optional embodiments, the power output interface 3 includes at least two interfaces with different output voltages, or the power output interface 3 includes at least two interfaces with different connectors. Specifically, please refer to... Figure 2 , Figure 2 This is a schematic diagram of another power control device structure for infrared imaging repair and testing of circuit boards disclosed in this embodiment. In one embodiment, each output path generates different voltages, such as 5V and 3.3V, through a voltage divider circuit on the main control circuit board. In another embodiment, the power output interface 3 can be, for example, Type-C, USB, or a banana plug. Of course, these two embodiments can also be combined. In specific implementation, by setting different interfaces, multiple circuit boards under test can be powered simultaneously. For example, digital circuits (5V) and sensor modules (3.3V) can be powered simultaneously, avoiding frequent interface changes; or, different interface types of circuit boards under test can be powered simultaneously. This improves testing efficiency.

[0051] In practical implementation, the power supply line 30 can be connected in either a detachable external manner or a fixed manner, as detailed below:

[0052] In one embodiment, the power output interface 3 is connected to an external power supply line to provide power to the circuit board under test. Please refer to [reference needed]. Figure 1 and Figure 3 , Figure 3 This is a schematic diagram of an external power supply cable structure disclosed in this embodiment. The power supply cable 30 is connected to the main body of the control device through a top pluggable interface. The interface type includes Type-C or banana plug, etc., and the end can be selected with an alligator clip / probe (e.g. Figure 3 (Illustrative diagram of the branched wire end style). In the specific implementation process, the maintenance personnel plug and unplug the power supply cable 30 to achieve interface locking buckle, and the end matches different end connectors. In this embodiment, the external power supply cable can be quickly replaced to adapt to multiple types of circuit board contacts; and, a single damaged wire can be replaced independently, thereby reducing maintenance costs (compared to integrated equipment).

[0053] In another embodiment, the power control device further includes a power supply line 30, one end of which is fixedly electrically connected to the power output interface 3, and the other end is used to connect to the circuit board under test. Please refer to... Figure 4 , Figure 4 This is a schematic diagram of another power control device for infrared imaging repair and inspection of circuit boards disclosed in this embodiment. The power supply line 30 is directly connected to the main control circuit board by soldering, as shown below. Figure 4The illustrated power supply line 30 extends directly from inside the housing without any interface. The junction of the power supply line 30 and the housing 1 can be achieved using a molding process, resulting in a seamless connection. In this embodiment, the fixed connection of the power supply line 30 avoids the risk of poor contact (the interface-free structure eliminates the possibility of loosening), making it suitable for high-vibration maintenance scenarios.

[0054] To provide real-time feedback on device status and improve operational safety, in an optional embodiment, the power control device further includes: indicator light 4, please refer to... Figure 1 , Figure 2 Indicator light 4 is located on the front of housing 1 and is electrically connected to the main control circuit board to indicate the operating status of the power control device. Indicator light 4 can be an LED, a dual-color LED, or a single-color LED. Specifically, indicator light 4 is used to flash at preset time intervals after physical switch 2 is pressed. Specifically, when the power control device is powered on, indicator light 4 can remain constantly lit; when physical switch 2 is pressed to provide a square wave pulse, indicator light 4 flashes at preset time intervals, and the specific flashing frequency can be the same as the preset frequency mentioned above.

[0055] In a specific embodiment, the indicator light 4 and the physical switch 2 are located on opposite sides of the housing 1, please refer to... Figure 1 These can be located on the left and right sides of the housing 1, respectively; or, the indicator lights 4 can be arranged around the physical switch 2. Please refer to [reference needed]. Figure 2 Indicator light 4 is placed on the top of the housing to avoid obstruction when held by hand.

[0056] To protect the switch and indicator light, and for aesthetic purposes, in an optional embodiment, a cover plate 11 is provided on the front of the housing 1, and the cover plate 11 has multiple through holes 110; the cover plate 11 covers the indicator light 4 and the physical switch 2. Please refer to... Figure 4 and Figure 5 , Figure 5 for Figure 4 A side-view perspective view after removing the power supply line 30. In a specific embodiment, the cover plate 11 is formed of a soft elastic material and covers the entire front of the housing 1. The through hole 110 includes two types of functional zones: one is set in the central area of ​​the cover plate to accurately transmit the pressing pressure to the switch; the other is set in a circumferential array of the cover plate to evenly scatter the light of the indicator light.

[0057] In an optional embodiment, the diameter of the switch column can be matched to the central through hole 11 to facilitate pressure conduction; microprism structures can be densely arranged in a matrix in the circumferential through holes 11 to improve light extraction efficiency.

[0058] In this embodiment, the cover plate 11 not only buffers external impacts to protect the device and allows the internal pulse circuit to continuously output a preset frequency signal, but also provides tactile feedback through the soft cover plate, supporting blind operation. For example, the pulse can be accurately triggered even when maintenance personnel are wearing gloves. Furthermore, the light guide area can achieve directional light output, thereby avoiding affecting the white balance of the thermal imager.

[0059] In practical implementation, the power control device can supply power to the power output interface 3 via an external power source, or it can supply power to the power output interface 3 via a built-in battery. Details are as follows:

[0060] In one embodiment, the power control device further includes: a power input interface 5, which is detachably connected to the power output interface 3 via a main control circuit board; the power input interface 5 receives externally supplied power via a power cord to provide power to the power output interface 3. Specifically, as... Figure 1 , Figure 5 , Figure 6 As shown, Figure 6 for Figure 2 Another perspective 3D schematic diagram shows that, in practical implementation, the power input interface 5 can be located on the side of the housing to facilitate the routing of the power cord. The external power supply can be a DC power supply, in which case the power control device only needs to perform DC-DC conversion; the external power supply can also be an AC power supply, in which case the power control device needs to perform AC-DC conversion.

[0061] In another embodiment, the power control device further includes a battery housed within the casing. The battery is detachably connected to the power output interface 3 via the main control circuit board and is used to provide power to the power output interface 3. Specifically, a compartment can be provided at the bottom of the casing, and the battery can be installed within this compartment. Of course, the battery can also be charged via an external power source. In this embodiment, by incorporating a battery, the power control device becomes simpler and lighter, making it easier for maintenance personnel to carry for maintenance and testing.

[0062] According to an embodiment of the present invention, a power control device for infrared imaging repair and inspection of circuit boards is disclosed. During the infrared thermal imaging process of the circuit board under test, a pulse trigger signal is directly generated through a physical switch. The level-flipping circuit on the main control circuit board responds and outputs a square wave pulse signal of a preset frequency. Operation requires no software debugging or parameter setting. The user only needs to press once to start the power control, solving the pain point of relying on host computer software to configure multiple device parameters in the prior art, simplifying the traditional operation process of more than 30 seconds to less than 1 second. In addition, the compact design around the housing allows maintenance personnel to hold the device with one hand to press the switch and freely adjust the position of the circuit board under test with the other hand, thus overcoming the rigidity problem of hands being restricted, making the device suitable for on-site mobile repair, especially convenient for operation in narrow spaces or when quickly locating thermal imaging anomalies. The entire process is controlled by hardware links (physical switch → level-flipping circuit → output interface), independent of the host computer system, avoiding detection interruption due to PC failure. It can be seen that through a highly integrated portable design, the host computer dependency problem in the prior art is completely solved, while significantly improving the efficiency and convenience of circuit board repair and inspection.

[0063] It will be understood by those skilled in the art that the above-described preferred solutions can be freely combined and superimposed without conflict. The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings; for example, two consecutively indicated blocks may actually be executed substantially in parallel, or sometimes in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions. The numbering of each step in this document is for ease of explanation and reference only and is not intended to limit the order of execution. The specific execution order is determined by the technology itself, and those skilled in the art can determine various permissible and reasonable orders based on the technology itself.

[0064] Those skilled in the art will understand that, without conflict, the above-mentioned preferred solutions can be freely combined and superimposed.

[0065] It should be understood that the above embodiments are merely exemplary and not restrictive. Various obvious or equivalent modifications or substitutions that can be made by those skilled in the art regarding the above details without departing from the basic principles of the present invention will be included within the scope of the claims of the present invention.

Claims

1. A power control device for infrared imaging repair and inspection of circuit boards, characterized in that, include: The housing (1) has interface holes on the front; The main control circuit board is housed inside the housing. The main control circuit board integrates a level switching circuit, which generates a square wave pulse signal of a preset frequency in response to a pulse trigger signal. The physical switch (2) passes through the interface hole on the front of the housing and is electrically connected to the button trigger pin of the main control circuit board for pressing to generate a pulse trigger signal; The power output interface (3) leads out positive and negative wires from the power output terminal of the main control circuit board and can be detachably connected to the circuit board under test for thermal imaging.

2. The power control device for infrared imaging repair and inspection of circuit boards as described in claim 1, characterized in that, The power output interface (3) includes at least two interfaces with different output voltages, or the power output interface (3) includes at least two interfaces with different connectors.

3. The power control device for infrared imaging repair and inspection of circuit boards as described in claim 1, characterized in that, The power output interface (3) is connected to an external power supply line to provide power to the circuit board under test.

4. The power control device for infrared imaging repair and inspection of circuit boards as described in claim 1, characterized in that, Also includes: The power supply line (30) has one end fixedly connected to the power output interface (3) and the other end used to connect to the circuit board under test.

5. The power control device for infrared imaging repair and inspection of circuit boards as described in any one of claims 1-4, characterized in that, Also includes: An indicator light (4) is located on the front of the housing (1) and is electrically connected to the main control circuit board to indicate the working status of the power control device.

6. The power control device for infrared imaging repair and inspection of circuit boards as described in claim 5, characterized in that, The indicator light (4) is used to flash at a preset time interval after the physical switch (2) is pressed.

7. The power control device for infrared imaging repair and inspection of circuit boards as described in claim 5, characterized in that, The indicator light (4) and the physical switch (2) are located on opposite sides of the housing (1); or, the indicator light (4) is arranged around the physical switch (2).

8. The power control device for infrared imaging repair and inspection of circuit boards as described in claim 5, characterized in that, The housing (1) is provided with a cover plate (11) on the front side, and the cover plate (11) has a plurality of through holes (110); The cover plate (11) covers the indicator light (4) and the physical switch (2).

9. The power control device for infrared imaging repair and inspection of circuit boards as described in any one of claims 1-4, characterized in that, Also includes: The power input interface (5) can be disconnected from the power output interface (3) via the main control circuit board; The power input interface (5) receives external power through a power line to supply power to the power output interface (3).

10. The power control device for infrared imaging repair and inspection of circuit boards as described in any one of claims 1-4, characterized in that, Also includes: The battery is housed inside the casing. The battery can be disconnected from the power output interface (3) via the main control circuit board and is used to provide power to the power output interface (3).

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