A self-checking system for CBD capacitance sensing device in PCB drilling machine

Abstract

The invention relates to the technical field of PCB drilling machines, and in particular to a self-checking system for a CBD capacitance sensing device in a PCB drilling machine, comprising a high-precision voltage sensor, a signal conditioning circuit and a data acquisition module. The high-precision voltage sensor is installed in a tool changing area near a CBD capacitance sensing device, so that the CBD capacitance sensing device can be checked before each processing, and possible faults thereof can be discovered in time, effectively avoiding the problem of inaccurate drilling depth caused by abnormal CBD signals, thereby improving the processing quality of PCBs and reducing the scrap rate. Faults can be detected in time before processing, so that interruption and reprocessing caused by CBD faults during processing can be avoided, thereby reducing the waste of production time and improving the overall production efficiency. An effective self-checking function is added to the PCB drilling machine, so that the operation of the equipment is more stable and reliable, and the maintenance cost and production loss caused by equipment failure are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of PCB drilling machines, and in particular to a self-checking system for a CBD capacitance sensing device in a PCB drilling machine. Background Art

[0002] As an indispensable component in modern electronic devices, printed circuit boards (PCBs) are responsible for the electrical connection and signal transmission between electronic components. They are made by coating copper on an insulating substrate and undergoing a series of processes to form conductive circuits and connection points, so as to achieve precise assembly and interconnection of electronic components. In the PCB manufacturing process, drilling is a crucial step, which is used to form through holes for component pin insertion or welding. In the PCB (printed circuit board) drilling process, CBD capacitive sensing devices play a vital role in accurately controlling the drilling depth.

[0003] When the PCB drilling machine is running, the CBD capacitive sensing device is prone to failure and is difficult to detect in time, resulting in inaccurate drilling depth control and affecting PCB quality. Especially after the tool is replaced, if the CBD capacitive sensing device signal is abnormal, it will cause a large amount of waste in subsequent processing. Summary of the invention

[0004] The purpose of the present invention is to provide a self-checking system for a CBD capacitance sensing device in a PCB drilling machine, aiming to solve the technical problem in the prior art that when the PCB drilling machine is running, the CBD capacitance sensing device is prone to failure and is difficult to be discovered in time, resulting in inaccurate control of drilling depth, affecting the quality of the PCB, especially after the tool is replaced, if the signal of the CBD capacitance sensing device is abnormal, it will cause a large amount of waste to be generated in subsequent processing.

[0005] To achieve the above-mentioned purpose, the present invention adopts a self-inspection system of a CBD capacitance sensing device in a PCB drilling machine, including a high-precision voltage sensor, a signal conditioning circuit and a data acquisition module. The high-precision voltage sensor is installed in a tool changing area close to the CBD capacitance sensing device, the signal conditioning circuit is connected to the high-precision voltage sensor, the data acquisition module is connected to the signal conditioning circuit, and is connected to the drilling machine control system through a high-speed communication interface.

[0006] Wherein, the high-precision voltage sensor is used to monitor the voltage change of the CBD capacitive sensing device in real time when it is in working state.

[0007] The signal conditioning circuit amplifies and filters the weak signal collected by the high-precision voltage sensor so that the signal can be accurately identified by the data acquisition module.

[0008] Wherein, the data acquisition module is used to convert the signal processed by the signal conditioning circuit into a digital signal and transmit it to the drilling machine control system through a high-speed communication interface;

[0009] The drilling machine control system compares the received detection result with a preset normal voltage range, and starts the processing flow if the detection result is normal, and issues an alarm and suspends the processing flow if the detection result is abnormal.

[0010] Wherein, the high-speed communication interface is USB or RS-485.

[0011] When installing the high-precision voltage sensor, the signal conditioning circuit and the data acquisition module, the installation location should avoid interference from other electrical equipment and be convenient for wiring and maintenance. At the same time, the signal transmission line uses shielded wires.

[0012] When the drilling machine control system detects a fault in the CBD capacitive sensing device, in addition to issuing an alarm and suspending the processing flow, it also records fault information, including the abnormal voltage value and the time when the fault occurred.

[0013] The self-checking system of a CBD capacitance sensing device in a PCB drilling machine of the present invention selects a suitable installation position in the tool change area of ​​the PCB drilling machine to ensure that the high-precision voltage sensor can accurately detect the voltage signal of the CBD capacitance sensing device. The installation position should avoid interference from other electrical equipment and be convenient for wiring and maintenance. Subsequently, the high-precision voltage sensor, the signal conditioning circuit and the data acquisition module are assembled and connected according to the design requirements. Ensure that the connection between each component is firm and reliable, and use shielded wires for signal transmission lines to reduce external electromagnetic interference; connect the self-checking system of the CBD capacitance sensing device in the PCB drilling machine to the drilling machine control system through a communication interface to complete the hardware installation; in specific use, after the drilling machine starts the processing task, when the tool change operation is completed, the drilling machine control system sends a start detection instruction to the self-checking system of the CBD capacitance sensing device in the PCB drilling machine, and the high-precision voltage sensor of the self-checking system of the CBD capacitance sensing device in the PCB drilling machine starts to collect the voltage signal of the CBD capacitance sensing device. After being processed by the signal conditioning circuit, the data acquisition module converts it into a digital signal and transmits it to the drilling machine control system, and the drilling machine control system compares the received voltage value with the preset normal voltage range. If the voltage value is within the normal range, the drilling machine control system continues to start the drilling process; if the voltage value exceeds the normal range, the drilling machine control system immediately stops the process and displays an alarm message on the operation interface to prompt the operator that the CBD capacitance sensing device has a fault, and records the fault information, including the detected abnormal voltage value, the time of the fault, etc., for subsequent troubleshooting and analysis. In this way, the problem in the prior art that the CBD capacitance sensing device is prone to failure and difficult to be discovered in time when the PCB drilling machine is running is solved, resulting in inaccurate drilling depth control, affecting the quality of the PCB, especially after the tool is replaced. If the signal of the CBD capacitance sensing device is abnormal, it will cause a large amount of waste to be generated in subsequent processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a principle block diagram of the connection between the self-checking system of the CBD capacitance sensing device in the PCB drilling machine of the present invention and the drilling machine.

[0016] 101- high-precision voltage sensor, 102- signal conditioning circuit, 103- data acquisition module, 104- high-speed communication interface, 105- drilling machine control system. DETAILED DESCRIPTION

[0017] Embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0018] See also Figure 1 , Figure 1 It is a principle block diagram of the connection between the self-checking system of the CBD capacitance sensing device in the PCB drilling machine of the present invention and the drilling machine.

[0019] The present invention provides a self-checking system for a CBD capacitance sensing device in a PCB drilling machine, comprising a high-precision voltage sensor 101, a signal conditioning circuit 102 and a data acquisition module 103, wherein the high-precision voltage sensor 101 is installed in a tool changing area close to the CBD capacitance sensing device, the signal conditioning circuit 102 is connected to the high-precision voltage sensor 101, the data acquisition module 103 is connected to the signal conditioning circuit 102, and is connected to a drilling machine control system 105 via a high-speed communication interface 104;

[0020] The high-precision voltage sensor 101 is used to monitor the voltage change of the CBD capacitive sensing device in real time when it is in working state;

[0021] The signal conditioning circuit 102 amplifies and filters the weak signal collected by the high-precision voltage sensor 101 so that the signal can be accurately identified by the data acquisition module 103;

[0022] The data acquisition module 103 is used to convert the signal processed by the signal conditioning circuit 102 into a digital signal, and transmit it to the drilling machine control system 105 through the high-speed communication interface 104;

[0023] The drilling machine control system 105 compares the received detection result with the preset normal voltage range, and starts the processing flow if the detection result is normal, and issues an alarm and suspends the processing flow if the detection result is abnormal;

[0024] When the high-precision voltage sensor 101, the signal conditioning circuit 102 and the data acquisition module 103 are installed, the installation location should avoid interference from other electrical equipment and be convenient for wiring and maintenance. At the same time, the signal transmission line uses a shielded line;

[0025] When the drilling machine control system 105 detects a fault in the CBD capacitance sensing device, in addition to issuing an alarm and suspending the processing flow, it also records fault information, which includes an abnormal voltage value and the time when the fault occurs.

[0026] For this specific implementation, a suitable installation position is selected in the tool change area of ​​the PCB drilling machine to ensure that the high-precision voltage sensor 101 can accurately detect the voltage signal of the CBD capacitance sensing device. The installation position should avoid interference from other electrical equipment and be convenient for wiring and maintenance. Subsequently, the high-precision voltage sensor 101, the signal conditioning circuit 102 and the data acquisition module 103 are assembled and connected according to the design requirements. Ensure that the connection between each component is firm and reliable, and use shielded wires for signal transmission lines to reduce external electromagnetic interference; connect the self-checking system of the CBD capacitance sensing device in the PCB drilling machine to the drilling machine control system 105 through a communication interface to complete the hardware installation; in specific use, after the drilling machine starts the processing task, when the tool change operation is completed, the drilling machine control system 105 sends a start detection instruction to the self-checking system of the CBD capacitance sensing device in the PCB drilling machine, and the high-precision voltage sensor 101 of the self-checking system of the CBD capacitance sensing device in the PCB drilling machine starts to collect the voltage signal of the CBD capacitance sensing device, which is converted into a digital signal by the data acquisition module 103 after being processed by the signal conditioning circuit 102 and transmitted to the drilling machine control system 105, and the drilling machine control system 105 compares the received voltage value with the preset normal voltage range. If the voltage value is within the normal range, the drilling machine control system 105 continues to start the drilling process; if the voltage value exceeds the normal range, the drilling machine control system 105 immediately stops the process and displays an alarm message on the operation interface to prompt the operator that the CBD capacitance sensing device has a fault, and records the fault information, including the detected abnormal voltage value, the time of the fault, etc., for subsequent troubleshooting and analysis. In this way, the problem in the prior art that when the PCB drilling machine is running, the CBD capacitance sensing device is prone to failure and is difficult to be discovered in time, resulting in inaccurate drilling depth control, affecting the quality of the PCB, especially after the tool is replaced, if the CBD capacitance sensing device signal is abnormal, it will cause a large amount of waste in subsequent processing.

[0027] The high-speed communication interface 104 is USB or RS-485.

[0028] According to this specific implementation, the high-speed communication interface 104 can ensure fast and accurate transmission of detection data, so that the drilling machine control system 105 can obtain the voltage detection result of the CBD capacitive sensing device in a timely manner.

[0029] Using the self-checking system of the CBD capacitance sensing device in a PCB drilling machine of this embodiment, a suitable installation position is selected in the tool change area of ​​the PCB drilling machine to ensure that the high-precision voltage sensor 101 can accurately detect the voltage signal of the CBD capacitance sensing device. The installation position should avoid interference from other electrical equipment and be convenient for wiring and maintenance. Subsequently, the high-precision voltage sensor 101, the signal conditioning circuit 102 and the data acquisition module 103 are assembled and connected according to the design requirements. Ensure that the connection between each component is firm and reliable, and use shielded wires for signal transmission lines to reduce external electromagnetic interference; connect the self-checking system of the CBD capacitance sensing device in the PCB drilling machine to the drilling machine control system 105 through a communication interface to complete the hardware installation; in specific use, after the drilling machine starts the processing task, when the tool change operation is completed, the drilling machine control system 105 sends a start detection instruction to the self-checking system of the CBD capacitance sensing device in the PCB drilling machine, and the high-precision voltage sensor 101 of the self-checking system of the CBD capacitance sensing device in the PCB drilling machine starts to collect the voltage signal of the CBD capacitance sensing device, which is converted into a digital signal by the data acquisition module 103 after being processed by the signal conditioning circuit 102 and transmitted to the drilling machine control system 105, and the drilling machine control system 105 compares the received voltage value with the preset normal voltage range. If the voltage value is within the normal range, the drilling machine control system 105 continues to start the drilling process; if the voltage value exceeds the normal range, the drilling machine control system 105 immediately stops the process and displays an alarm message on the operation interface to prompt the operator that the CBD capacitance sensing device has a fault, and records the fault information, including the detected abnormal voltage value, the time of the fault, etc., for subsequent troubleshooting and analysis. In this way, the problem in the prior art that when the PCB drilling machine is running, the CBD capacitance sensing device is prone to failure and is difficult to be discovered in time, resulting in inaccurate drilling depth control, affecting the quality of the PCB, especially after the tool is replaced, if the CBD capacitance sensing device signal is abnormal, it will cause a large amount of waste in subsequent processing.

[0030] The present invention can timely discover possible faults of the CBD capacitance sensing device by checking the device before each processing, effectively avoiding the problem of inaccurate drilling depth caused by abnormal CBD signals, thereby improving the processing quality of the PCB and reducing the scrap rate.

[0031] At the same time, timely detection of faults before processing can avoid interruptions and reprocessing caused by CBD failures during processing, reduce waste of production time, and improve overall production efficiency.

[0032] The present invention adds an effective self-checking function to the PCB drilling machine, thereby making the operation of the equipment more stable and reliable and reducing the maintenance cost and production loss caused by equipment failure.

[0033] What is disclosed above is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A self-checking system for a CBD capacitance sensing device in a PCB drilling machine, characterized in that: It includes a high-precision voltage sensor, a signal conditioning circuit and a data acquisition module. The high-precision voltage sensor is installed in the tool changing area near the CBD capacitive sensing device. The signal conditioning circuit is connected to the high-precision voltage sensor. The data acquisition module is connected to the signal conditioning circuit and is connected to the drilling machine control system through a high-speed communication interface.

2. The self-checking system of the CBD capacitance sensing device in the PCB drilling machine according to claim 1, characterized in that: The high-precision voltage sensor is used to monitor the voltage change of the CBD capacitive sensing device in real time when it is in working state.

3. The self-checking system of the CBD capacitance sensing device in the PCB drilling machine as claimed in claim 2, characterized in that: The signal conditioning circuit amplifies and filters the weak signal collected by the high-precision voltage sensor so that the signal can be accurately identified by the data acquisition module.

4. The self-checking system of the CBD capacitance sensing device in the PCB drilling machine as claimed in claim 3, characterized in that: The data acquisition module is used to convert the signal processed by the signal conditioning circuit into a digital signal and transmit it to the drilling machine control system through a high-speed communication interface; The drilling machine control system compares the received detection result with a preset normal voltage range, and starts the processing flow if the detection result is normal, and issues an alarm and suspends the processing flow if the detection result is abnormal.

5. The self-checking system of the CBD capacitance sensing device in the PCB drilling machine as claimed in claim 4, characterized in that: The high-speed communication interface is USB or RS-485.

6. The self-checking system of the CBD capacitance sensing device in the PCB drilling machine as claimed in claim 5, characterized in that: When installing the high-precision voltage sensor, the signal conditioning circuit and the data acquisition module, the installation location should avoid interference from other electrical equipment and be convenient for wiring and maintenance. At the same time, shielded wires are used for signal transmission lines.

7. The self-checking system of the CBD capacitance sensing device in the PCB drilling machine as claimed in claim 6, characterized in that: When the drilling machine control system detects a fault in the CBD capacitance sensing device, in addition to issuing an alarm and suspending the processing flow, it also records fault information, which includes an abnormal voltage value and the time when the fault occurred.

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