A detection device for control panel in various quantization input and output conditions

Abstract

The utility model discloses a kind of detection devices for control panel under various quantization input and output conditions, including host computer and detection tooling, detection tooling includes base, bottom plate, and the cover plate being set in the top of base, driving assembly is equipped on base and drives cover plate to move up and down, the top of bottom plate is detection station, for placing the control panel to be measured, detection plate is equipped in base, a plurality of pins are fixed on bottom plate and pass through bottom plate, pin is divided into three parts, first part is communicated with host computer by 485 communication line, second part is communicated with detection plate by 485 communication line, third part is electrically connected with detection interface on detection plate, the position of pin on bottom plate is matched with test point on control panel, cover plate is used to press down control panel tightly.The utility model can greatly improve detection efficiency, precision and consistency, reduce manpower cost and artificial misjudgment, component damage risk, meet high-speed production and multi-scene quantization input and output detection demand.

Description

Technical Field

[0001] This utility model relates to a detection device for a control board under various quantitative input and output conditions. Background Technology

[0002] Currently, the quality requirements for Chinese-made products are increasing. In order to ensure quality and reliability, control boards need to be tested during the factory process. Traditional testing methods have problems such as low testing efficiency, poor accuracy, poor repeatability, inconsistent testing standards, high labor costs, and susceptibility to human factors that can lead to batch defects. They are difficult to meet the testing needs of high-speed production and high-quality products. In order to reduce human testing errors and speed up production efficiency, it is urgent to adopt automatic testing methods to replace traditional manual testing. Utility Model Content

[0003] To address the aforementioned problems, this invention provides a detection device for control boards under various quantitative input and output conditions, effectively solving the problems mentioned in the background art.

[0004] The technical solution adopted in this utility model is:

[0005] A testing device for a control board under various quantitative input / output conditions includes a host computer and a testing fixture. The testing fixture includes a base, a base plate fixed to the top of the base, and a cover plate positioned directly above the base. The base is equipped with a drive assembly for moving the cover plate up and down. The top of the base plate is a testing station for placing the control board to be tested. The base contains a testing board. Multiple pins penetrating the top and bottom of the base plate are fixed on the base plate. Each pin consists of three parts: the first part communicates with the host computer via a 485 communication line; the second part communicates with the testing board via a 485 communication line; and the third part is electrically connected to a testing interface on the testing board. The position of the pins on the base plate matches the test points on the control board. The cover plate is used to press the control board downwards.

[0006] Preferably, the bottom of the cover plate is fixed with a plurality of downward protruding pressure rods. When the cover plate presses down on the control plate, the pressure rods abut against the control plate and avoid the components on the control plate.

[0007] Preferably, the detection plate and the base plate form an integral assembly, the top of the base has an opening that matches the detection plate, and the base plate is fixed to the base with screws.

[0008] Preferably, the base is provided with a 485 terminal, which is connected to the detection plate and the first part of the pin on the inner side of the base, and connected to the host computer on the outer side of the base.

[0009] Preferably, the drive assembly includes a cylinder and a cover plate seat fixed to the front end of the cylinder's push rod, the cover plate seat being fixedly connected to the cover plate by bolts.

[0010] Preferably, the cover plate seat has multiple guide holes, and a guide rod is matched in the guide holes, and the guide rod is fixed to the base.

[0011] Preferably, the host computer is used for customized setting of detection parameters and for issuing real-time commands.

[0012] The innovative points of this utility model are as follows:

[0013] I. "Layered Modular" Testing Tooling Structure Design: Breaking Through the Limitations of Traditional Integration

[0014] Traditional control board testing fixtures often adopt an "integrated" structure, with the testing board, support components, and connecting components nested together. This not only makes disassembly and maintenance difficult, but also requires overall modification to adapt to different control board models, resulting in high adaptation costs and long cycles. This device innovatively adopts a layered modular architecture of "base-bottom plate-cover plate," where each layer functions independently yet works in synergy, as detailed below:

[0015] 1. Clearly defined functional base design: The base is no longer a single supporting carrier, but integrates three major functional modules: "drive core + detection hub + wiring interface". An independent detection board is embedded inside, serving as the core for detection data processing and command execution. Standardized 485 terminals are set on the side to realize internal connection between the base and the detection board and the ejector pin, as well as external communication with the host computer, avoiding signal interference problems caused by messy and cross-shaped wires in traditional tooling. At the same time, an opening matching the base plate is reserved to provide a positioning benchmark for precise docking of the detection board and the base plate, ensuring that the detection board and the base plate form a stable whole component, greatly improving structural stability and signal transmission reliability.

[0016] 2. Quickly Adaptable Base Plate Components: As the core load-bearing component of the testing station, the base plate's innovation lies in its "modular pin layout + standardized fixing method." The pins fixed on the base plate are divided into three categories according to their functions, corresponding to "host computer communication, testing board communication, and testing interface connection," and the pin positions can be distributed according to the needs of different control boards. The base plate is fixed to the base with screws, and disassembly and assembly can be completed simply by tightening the screws. Compared with the welding or snap-fit ​​fixing of traditional tooling, the time for replacing the base plate is reduced from several hours to a few minutes, greatly improving the compatibility efficiency of multiple control boards. When testing different control boards, only the overall component formed by the base plate and the testing board needs to be replaced, which greatly improves the replacement efficiency and reduces the replacement difficulty.

[0017] 3. Cover plate structure with guide positioning: The cover plate breaks through the traditional "simple pressing" function and innovatively integrates the dual functions of "precise pressing + guide stability". The pressure rod fixed at the bottom adopts a customized layout to "avoid components". By pre-matching the position of components on the control board, it ensures that the pressing only acts on the non-component areas of the control board, avoiding the component damage caused by pressure in traditional tooling. The guide hole on the cover plate seat and the guide rod fixed on the base are precisely matched. When the drive component moves the cover plate up and down, the guide rod slides along the guide hole, eliminating the offset during the movement of the cover plate. This keeps the contact deviation between the ejector pin and the test point of the control board within 0.1mm, which is much lower than the 1-2mm contact deviation of traditional tooling, greatly improving the detection contact accuracy. The structure of the cover plate being fixed by the cover plate seat allows for quick replacement of the cover plate when testing different control boards.

[0018] 2. Collaborative communication design of "three types of functional pins" to construct a closed-loop detection data link

[0019] In traditional testing devices, the probes typically only perform a "single signal transmission" function, such as connecting only the test points of the testing board and the control board. Communication between the host computer and the control board requires an external cable, resulting in a long communication link, high signal delay, and susceptibility to external interference. This device innovatively designs "three-category functional partition probes," constructing a closed-loop data link of "host computer - probe - testing board - probe - control board," achieving efficient and interference-free transmission of testing commands and data, as detailed below:

[0020] 1. Three-tiered design of the probe function: The probes are clearly divided into three categories according to their functions. The first type of probe is directly connected to the host computer via a 485 communication line, responsible for accurately transmitting the host computer's test instructions (such as test interface type, test parameters, etc.) to the control board. The second type of probe is connected to the test board and is used to transmit the real-time test data (such as control board input and output signal values, fault codes, etc.) back to the test board for processing. The third type of probe is directly electrically connected to the test interface on the test board, realizing the direct acquisition of the control board's quantitative input and output signals by the test board. The three types of probes work independently and work together to avoid the signal conflict problem caused by a single probe undertaking multiple tasks at the same time. This reduces the instruction transmission delay to within 10ms and improves the data acquisition accuracy to ±0.01V (voltage signal) and ±0.001A (current signal), meeting the high-precision detection requirements of the control board's quantitative input and output.

[0021] 2. "Internal and External Isolation" Transmission of 485 Communication: Through the standardized 485 terminal on the base, the communication line is "internal and external isolated". The internal line (inner side of the base) is only used for the connection between the pin and the detection board, and between the detection board and the terminal. The external line (outer side of the base) is only used for the connection between the terminal and the host computer. This avoids electromagnetic interference caused by the mixing of internal and external lines in traditional tooling. At the same time, the 485 communication protocol has the advantages of strong anti-interference ability and long transmission distance. Combined with the line isolation design of this device, it can effectively resist electromagnetic interference generated by equipment such as motors and frequency converters in the workshop environment, reducing the communication failure rate from more than 15% in traditional tooling to less than 1%, ensuring the continuity and stability of the detection process.

[0022] 3. An automated clamping mechanism based on "cylinder drive + guide positioning" improves inspection consistency and safety.

[0023] Traditional control board testing often employs manual clamping, which is not only physically demanding for operators but also results in inconsistent clamping force (typically deviating by 50-100N), leading to unstable contact pressure between the pin and the test point and affecting test results. Some automatic clamping fixtures use motor drives but lack guiding mechanisms, making them prone to clamping misalignment and damage to the control board. This device innovatively adopts an automated clamping mechanism of "cylinder drive + guiding positioning," solving the core pain points of traditional clamping methods, as detailed below:

[0024] 1. Cylinder-driven constant force clamping control: Using a cylinder as the drive source, the clamping force can be precisely controlled by adjusting the air pressure (accuracy up to ±5N), ensuring that the clamping force of the pressure rod on the control board is consistent during each test. This avoids problems such as poor contact of the ejector pin or deformation of the control board caused by differences in clamping force. Compared with manual clamping, automated cylinder drive can achieve fully unmanned operation of "one-button start - automatic clamping - test completion - automatic release". The test time of a single control board is reduced from 2-3 minutes of traditional manual operation to less than 30 seconds, which greatly improves the test efficiency. At the same time, the cylinder drive has a fast response speed (start time <0.5 seconds), which can adapt to the cycle time requirements of high-speed production lines (120-150 control boards can be tested per hour).

[0025] 2. Coordinated positioning of guide rod and guide hole: A "guide rod-guide hole" mating structure is added between the cover plate seat and the base. The guide rod is rigidly fixed to the base, and the guide hole is precisely machined to the cover plate seat (matting clearance <0.05mm). When the cylinder drives the cover plate to move up and down, the guide rod moves linearly along the guide hole, strictly limiting the lateral displacement of the cover plate and controlling the deviation of the cover plate's movement trajectory within 0.05mm. This design completely solves the problem of ejector pin misalignment caused by cover plate offset in traditional motor drive or manual clamping, ensuring that the ejector pin can accurately align with the control board test point every time. The contact success rate is increased from 90% of traditional tooling to over 99.9%, while avoiding damage to the control board test point due to ejector pin misalignment and reducing the scrap rate during the control board testing process.

[0026] Fourth, the three-level linkage detection logic of "host computer - detection board - control board" enables full-process controllability of quantitative input and output.

[0027] Traditional testing devices often employ a single logic of "direct control of the control board by the host computer" or "independent testing by the testing board." The former lacks an intermediate data processing stage and is prone to testing errors due to delays in host computer commands; the latter cannot receive flexible commands from the host computer and can only complete fixed-item tests, making it difficult to adapt to the testing requirements of the control board's "various quantitative inputs and outputs." This device innovatively constructs a three-level linkage testing logic of "host computer command issuance - testing board data processing - control board signal feedback," achieving precise control and quantitative data closed-loop throughout the entire testing process, as detailed below:

[0028] 1. The "Customized Command Output" function of the host computer: The host computer is no longer a simple "data display terminal", but has the core control capability of "customized setting of detection parameters + real-time command issuance". Operators can flexibly set the detection interface type (such as analog input interface, digital output interface, etc.), the number of detection interfaces, and the quantitative detection parameters (such as voltage detection range 0-24V, current detection range 0-5A, etc.) through the host computer interface, and send "start test" and "stop test" commands in real time. This breaks through the limitation of traditional detection devices that can only detect according to fixed programs. It can adapt to the quantitative input and output detection needs of control boards in different industries (such as industrial control, home appliance control, automotive electronics). The detection scenario coverage rate has increased from the traditional 30% to more than 90%.

[0029] 2. As the core hub of the three-level linkage, the detection board undertakes data processing functions. It collects the quantization input and output signals of the control board in real time and performs filtering, amplification, and AD conversion to convert analog signals into digital data, ensuring that the data accuracy meets the quantization detection requirements. Then, the detection data is sent to the host computer, which automatically judges whether there are problems such as "abnormal input signal" or "output signal deviation" on the control board, realizing automatic judgment of detection results without manual intervention. The judgment accuracy rate can reach over 99.5%, greatly reducing the risk of human error.

[0030] 3. The control board's "real-time feedback" mechanism: Through the coordinated action of three types of pins, the control board can continuously feed back real-time quantized input and output signals (such as the current input voltage value and output current value) to the detection board, forming a closed-loop process of "command issuance - signal acquisition - data feedback". Compared with the traditional detection mode of "one-time feedback of results after detection", this device can monitor the signal changes during the detection process in real time. When an abnormal signal occurs (such as a sudden rise in voltage or a sudden drop in current), the detection board can immediately send an early warning signal to the host computer, and the host computer will then issue a "stop test" command, avoiding damage to the control board due to continuous abnormal operation. At the same time, it is convenient for operators to trace the time node and specific cause of the abnormality, improving the efficiency of fault diagnosis.

[0031] 5. The dual-function design of "high adaptability + high security" covers the detection needs of multiple scenarios.

[0032] Traditional testing devices generally suffer from poor compatibility and low safety. Adapting to a single control board model requires modifying the entire tooling, and there is a lack of protection measures for the control board components, which can easily lead to component damage. This device is innovatively designed from two dimensions: "multi-model compatibility" and "component protection," as detailed below:

[0033] 1. Rapid adaptation of multiple control boards: Through the combination design of "modular base plate + customized pressure bar + flexible ejector pin layout", it is possible to quickly adapt to control boards of different sizes and test point distributions. The base plate can be replaced according to the size of the control board and the position of the test points, and the pressure bar can be customized according to the distribution of components. There is no need to replace core components such as the base and drive components. The adaptation cost is only 1 / 5 of that of traditional tooling, and the adaptation cycle is shortened to 1 / 10 of that of traditional tooling. For example, for the switching between home appliance control boards and industrial control boards, only the base plate and the pressure bar need to be replaced to quickly complete the adaptation, meeting the testing needs of multiple varieties and small batches on the production line.

[0034] 2. Targeted Protection of Control Board Components: The pressure bar at the bottom of the cover plate adopts a customized design that "avoids components." By scanning the component layout diagram of the control board in advance, the installation position of the pressure bar is accurately determined, ensuring that when clamping, the pressure bar only acts on the edge of the PCB board of the control board or the area without components, avoiding the problem of capacitor and resistor damage caused by direct pressure on components in traditional tooling. At the same time, the contact between the ejector pin and the test point of the control board adopts a "flexible contact" design. The head of the ejector pin is made of conductive silicone material, and the contact pressure is controlled at 5-10N. This ensures good conductivity while avoiding test point wear or PCB board deformation caused by rigid contact. The component damage rate during the control board testing process has been reduced from the traditional 5% to below 0.1%, greatly improving the safety of the control board during the testing process.

[0035] This utility model adopts a layered modular structure of "base-bottom plate-cover plate" and constructs a closed-loop communication link of "host computer-detection board-control board" through three types of functional pins. It is equipped with an automated clamping mechanism with cylinder drive and guiding positioning to realize flexible setting of detection parameters and real-time closed-loop control. At the same time, it has the features of rapid adaptation to multiple control board models and component protection design, which greatly improves detection efficiency, accuracy and consistency, reduces labor costs and the risk of human error and component damage, and meets the needs of high-speed production and multi-scenario quantitative input and output detection. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0037] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0038] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0039] Furthermore, in the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0044] like Figure 1As shown, a testing device for a control board under various quantitative input / output conditions includes a host computer 1 and a testing fixture 2. The testing fixture 2 includes a base 21, a base plate 22 fixed to the top of the base 21, and a cover plate 23 positioned directly above the base 21. The base 21 is equipped with a drive assembly for driving the cover plate 23 to move up and down. The top of the base plate 22 is a testing station for placing the control board 3 to be tested. A testing board 24 is located inside the base 21. Multiple pins 25 penetrating the top and bottom of the base plate 22 are fixed on the base plate 22. Each pin 25 consists of three parts: the first part communicates with the host computer 1 via a 485 communication line; the second part communicates with the testing board 24 via a 485 communication line; and the third part is electrically connected to the testing interface on the testing board 24. The position of the pins 25 on the base plate 22 matches the test point on the control board 3. The cover plate 23 is used to press the control board 3 downwards.

[0045] The bottom of the cover plate 23 is fixed with a plurality of downward protruding pressure rods 27. When the cover plate 23 presses down on the control plate 3, the pressure rods 27 abut against the control plate 3 and avoid the components on the control plate 3.

[0046] The detection plate 24 and the base plate 22 form an integral assembly. The top of the base 21 has an opening that matches the detection plate 24. The base plate 22 is fixed to the base 21 with screws.

[0047] The base 21 is provided with a 485 terminal 28. The 485 terminal 28 is connected to the detection plate 24 and the first part of the pin 25 on the inner side of the base 21, and is connected to the host computer 1 on the outer side of the base 21.

[0048] The drive assembly includes a cylinder 29 and a cover plate seat 210 fixed to the front end of the push rod of the cylinder 29. The cover plate seat 210 is fixedly connected to the cover plate 23 by bolts.

[0049] The cover plate seat 210 has multiple guide holes, and a guide rod 211 is matched in the guide holes. The guide rod 211 is fixed to the base 21.

[0050] The host computer 1 is used for customized setting of detection parameters and issuance of real-time commands.

[0051] This utility model utilizes a three-level linkage architecture of "host computer - detection board - control board," combined with layered modular tooling and three types of functional pins, to achieve automated and high-precision detection of the control board's quantitative input and output. The core working principle can be divided into two main dimensions: structural collaborative operation and closed-loop data transmission. The specific process is as follows:

[0052] I. Structural Collaborative Operation: Automated Linkage of Layered Modules

[0053] The device adopts a layered modular structure of "base-bottom plate-cover plate". Each module achieves precise linkage with the positioning structure through drive components, providing a stable physical basis for detection. The specific operating logic is as follows:

[0054] 1. Testing Preparation Stage: Workstation Positioning and Tooling Adaptation

[0055] According to the model of the control board to be tested, the operator selects the matching "base plate - test board" overall assembly and cover plate (the position of the ejector pin on the base plate has been preset according to the test points of the control board of this model, and the pressure bar layout of the cover plate has avoided the components). The base plate is fixed to the top opening of the base with screws, and the cover plate is fixed to the cover plate seat with bolts to complete the mechanical adaptation.

[0056] Connect the 485 terminal on the outside of the base to the host computer to establish an external communication link; the 485 terminal on the inside of the base has been pre-connected to the detection board and the first type of ejector pin, and at this time the initial communication channel of "host computer - terminal - ejector pin / detection board" is automatically formed.

[0057] 2. Testing and Execution Phase: Automated Pressing and Precise Contact

[0058] The control board to be tested is placed on the testing station of the base plate. The operator sends a "start testing" command through the host computer. After receiving the command, the cylinder in the drive assembly drives the cover plate seat and the cover plate to move downward along the guide rod (the guide rod and the guide hole of the cover plate seat cooperate to ensure that the movement trajectory deviation is <0.05mm).

[0059] The pressure bar at the bottom of the cover plate first contacts the non-component area of ​​the control board. As the cylinder continues to apply force (pressure force accuracy ±5N), the control board is steadily pressed until the three types of ejector pins on the base plate are in complete contact with the test points of the control board (contact deviation <0.1mm). At this point, the mechanical structure is ready and the data detection stage begins.

[0060] 3. End of testing phase: Automatic reset and board removal

[0061] After the test is completed, the host computer issues a "stop test" command, and the cylinder drives the cover plate to reset upward and detach from the control board. The operator removes the control board after the test is completed. If other models need to be tested, only the screws and bolts need to be removed, the "base plate-test plate" assembly and the cover plate need to be replaced, and the next round of testing can be started.

[0062] II. Closed-Loop Data Transmission: Three-Level Linked Quantitative Detection Logic

[0063] The device constructs a closed-loop data link of "host computer - detection board - control board" through three types of functional pins, realizing full-process controllability of detection command issuance, quantization signal acquisition, data processing and result feedback. The specific logic is as follows:

[0064] Step 1: Issuance of customized instructions from the host computer

[0065] Before testing, the operator sets the quantitative testing parameters through the host computer interface, including the testing interface type (such as analog input, digital output), voltage detection range (0-24V), current detection range (0-5A), etc. After the test is started, the host computer transmits these customized instructions to the 485 terminal on the outside of the base through the communication line, and then to the first set of pins. The first set of pins accurately sends the instructions to the control board, and the control board enters the corresponding quantitative input and output working mode according to the instructions.

[0066] Step 2: The control board quantizes the signal and feeds it back to the detection board.

[0067] After the control board operates according to the instructions, it generates quantitative input and output signals in real time (such as the current input voltage value and output current value). These signals are transmitted to the third part of the ejector pin on the base plate (the third part of the ejector pin is electrically connected to the detection interface of the detection board) through the test points of the control board, and are directly transmitted to the detection board. At the same time, the operating status signal of the control board (such as whether it responds to the instructions normally) is fed back to the detection board through the second part of the ejector pin, forming a preliminary signal acquisition link.

[0068] Step 3: Data Processing of the Detection Board

[0069] The detection board acts as an "intermediate hub," receiving the quantized signal transmitted by the third part of the pins, and then filtering, amplifying, and performing AD conversion (converting the analog signal into digital data) to ensure that the data accuracy reaches ±0.01V (voltage) and ±0.001A (current).

[0070] If an abnormal signal occurs during the detection process (such as a sudden voltage rise or a sudden current drop), the detection board will immediately send a "pause operation" temporary command to the control board through the second part of the pin, and send a warning signal back to the host computer to avoid damage to the control board;

[0071] Step 4: Data Feedback and Visualization

[0072] The detection board transmits the processed quantitative data (such as voltage / current values ​​at each test point) back to the host computer via a 485 communication line (through the 485 terminal). After receiving the data, the host computer uses a built-in fault diagnosis algorithm to automatically determine whether the control board has problems such as "abnormal input signal" or "output signal deviation". The detection curve (such as voltage change curve over time) and the final result are displayed on the interface in real time. Operators can view the data directly without manual intervention. The accuracy rate of the judgment is over 99.5%.

[0073] Throughout the data transmission process, the "internal and external isolation" design of the 485 communication (internal lines connect only the pins and the detection board, and external lines connect only the terminals and the host computer) and the protocol's anti-interference characteristics can resist electromagnetic interference in the workshop, reducing the communication failure rate to below 1% and ensuring the continuity and stability of data transmission.

[0074] III. Core Advantages: Principles that Target Detection Needs

[0075] 1. Efficiency Improvement: Automated cylinder clamping (detection time reduced from 2-3 minutes to within 30 seconds) + modular component replacement (adaptation time reduced from several hours to a few minutes), meeting the needs of high-speed production;

[0076] 2. Accuracy Guarantee: Guided positioning (contact deviation <0.1mm) + independent communication of three types of ejector pins (command delay <10ms) + constant force clamping (accuracy ±5N) to ensure accurate quantitative detection data;

[0077] 3. Safety Protection: The pressure rod avoids contact with components + the ejector pin makes flexible contact (pressure 5-10N), reducing the damage rate of the control board from 5% to below 0.1%; real-time early warning of abnormalities prevents equipment failure from escalating;

[0078] 4. Compatibility Coverage: Customized host computer parameters and modular component adaptation increase the coverage of testing scenarios from 30% to over 90%, meeting the testing needs of control boards in multiple fields such as industry, home appliances, and automotive electronics.

[0079] Finally, it should be noted that the above examples are merely specific embodiments of this utility model. Obviously, this utility model is not limited to the above embodiments and can have many variations. All variations that can be directly derived or conceived by those skilled in the art from the disclosure of this utility model should be considered within the protection scope of this utility model.

Claims

1. A detection device for a control board under various quantization input / output conditions, characterized in that, The system includes a host computer (1) and a testing fixture (2). The testing fixture (2) includes a base (21), a base plate (22) fixed to the top of the base (21), and a cover plate (23) set directly above the base (21). The base (21) is provided with a drive assembly for driving the cover plate (23) to move up and down. The top of the base plate (22) is a testing station for placing the control board (3) to be tested. The base (21) contains a testing board (24). Multiple ejector pins (25) are fixed on the bottom plate (22) and penetrate the top and bottom. The ejector pins (25) are divided into three parts. The first part communicates with the host computer (1) through the 485 communication line. The second part communicates with the detection board (24) through the 485 communication line. The third part is electrically connected to the detection interface on the detection board (24). The position of the ejector pins (25) on the bottom plate (22) matches the test point on the control board (3). The cover plate (23) is used to press the control board (3) down.

2. The detection device for a control board under various quantization input / output conditions according to claim 1, characterized in that, The bottom of the cover plate (23) is fixed with a plurality of downward protruding pressure rods (27).

3. The detection device for a control board under various quantization input / output conditions according to claim 2, characterized in that, The detection plate (24) and the base plate (22) form an integral assembly. The top of the base (21) has an opening that matches the detection plate (24). The base plate (22) is fixed to the base (21) with screws.

4. The detection device for a control board under various quantization input / output conditions according to claim 3, characterized in that, The base (21) is provided with a 485 terminal (28). The 485 terminal (28) is connected to the detection plate (24) and the first part of the pin (25) on the inner side of the base (21), and is connected to the host computer (1) on the outer side of the base (21).

5. The detection device for a control board under various quantization input / output conditions according to claim 4, characterized in that, The drive assembly includes a cylinder (29) and a cover plate seat (210) fixed to the front end of the push rod of the cylinder (29), the cover plate seat (210) being fixedly connected to the cover plate (23) by bolts.

6. The detection device for a control board under various quantization input / output conditions according to claim 5, characterized in that, The cover plate seat (210) is provided with multiple guide holes, and a guide rod (211) is matched in the guide hole. The guide rod (211) is fixed to the base (21).

7. The detection device for a control board under various quantization input / output conditions according to claim 6, characterized in that, The host computer (1) is used for customized setting of detection parameters and issuance of real-time commands.

Images