A rapid testing system for DB9 connector communication cables based on Arduino

Abstract

This utility model relates to the field of electronic testing instrument technology, specifically to a rapid testing system for DB9 connector communication cables based on Arduino. The system includes an Arduino main control board, a power supply, a TFT LCD display, a multiplexer, a protection circuit, a logic level circuit, a DB9 connector male socket, and a DB9 connector female socket. The power supply is connected to the Arduino main control board, the TFT LCD display, and the multiplexer. The TFT LCD display and the multiplexer are connected to the Arduino main control board. Both the DB9 connector male and female sockets are connected to the Arduino main control board via the multiplexer. This utility model offers advantages such as simplicity, speed, intuitive and accurate result display, and time and effort savings in the testing of DB9 connector communication cables.

Description

Technical Field

[0001] This utility model relates to the field of electronic testing instrument technology, specifically to a rapid testing system for DB9 connector communication cables based on Arduino. Background Technology

[0002] The DB9 connector, a 9-pin D-type connector, plays a vital role in serial communication. It is widely used in serial communication interfaces such as RS-232 and RS-485, serving an indispensable function for the operation of computers and industrial equipment. In the production process of DB9 connector communication cables, the currently widely implemented testing method involves using a multimeter to check the continuity between each pin and the cable core wire to ensure correct pin soldering. However, this testing method has several shortcomings, such as being cumbersome, time-consuming, and lacking necessary intuitiveness.

[0003] Furthermore, the potential risks of human error during the testing process cannot be ignored. For example, the reliability of the contact between the multimeter probes and pins, as well as the accuracy of the readings, can be affected by the operator's subjective factors. These factors may lead to inaccurate measurement results, which could then adversely affect production progress. Summary of the Invention

[0004] The purpose of this invention is to solve the aforementioned technical problems. This invention provides a rapid detection system for DB9 connector communication cables based on Arduino, used to detect the wire connection status of DB9 connector communication cables and the positions of the pins soldered inside the DB9 connectors at both ends of the cable. This invention can quickly and automatically detect the connection status and pin positions of signal cables and connectors, and display the results intuitively on a screen.

[0005] The solution to the above problems provided by this utility model is as follows:

[0006] This utility model provides a rapid testing system for DB9 connector communication cables based on Arduino, including an Arduino main control board, as well as a power supply, a first multiplexer, a second multiplexer, a DB9 connector male socket, and a DB9 connector female socket;

[0007] The power supply is connected to the Arduino main control board, the first multiplexer, and the second multiplexer respectively. The first multiplexer and the second multiplexer are connected to the Arduino main control board, the DB9 connector male socket protection circuit, and the DB9 connector female socket logic level circuit respectively.

[0008] Furthermore, the DB9 connector male socket and DB9 connector female socket are respectively connected to the first multiplexer and the second multiplexer;

[0009] Furthermore, the DB9 connector male socket protection circuit includes current-limiting resistors R1 to R9; the DB9 connector female socket logic level circuit includes pull-up resistors R10 to R18;

[0010] Furthermore, in the DB9 male socket protection circuit, the current-limiting resistor is used to limit the current magnitude;

[0011] Furthermore, in the logic level circuit of the DB9 connector female socket, the pull-up resistor is used to determine the initial level and establish a reference voltage, to avoid false triggering caused by signal uncertainty and to provide a clear level reference, so that the detection circuit can distinguish between the on and off states;

[0012] Furthermore, it also includes a TFT LCD screen, with the power supply and Arduino main control board respectively connected to the TFT LCD screen for displaying the test results;

[0013] Furthermore, the test results show the continuity status of the male and female pins of the DB9 connector, and the corresponding relationship between the male and female pins connected by the cable is shown by connecting lines.

[0014] The beneficial effects of this utility model are:

[0015] Improved Testing Efficiency: Compared to the traditional method of testing each pin individually with a multimeter, this design achieves rapid testing of the male and female pins of DB9 connector communication cables through close collaboration between modules. For example, in the process of testing DB9 communication cables, a traditional multimeter takes several minutes to measure all pins, while this testing system can complete the entire testing process in just a few seconds, greatly reducing testing time and significantly improving testing efficiency. This advantage is particularly suitable for large-scale production environments or scenarios involving the testing of a large number of cables, effectively shortening the testing cycle, improving production efficiency, and reducing labor costs.

[0016] Enhanced Detection Accuracy: This invention employs level detection to measure the continuity between pins and corresponding cable cores. Compared to traditional multimeter testing, which is significantly affected by human factors such as the contact between the probes and pins, and the accuracy of the readings, this method can more accurately detect the continuity of communication cables. Furthermore, in the DB9 male connector detection circuit, a current-limiting resistor is connected in series between the pin and the first multiplexer connection line. This resistor limits the current protection circuit, ensuring stable operation of the detection circuit and further improving detection accuracy. In the DB9 female connector detection circuit, a parallel pull-up resistor is used to determine the initial level and establish a reference voltage. This avoids false triggering caused by signal uncertainty and provides a clear level reference, enabling the detection circuit to distinguish between conduction and disconnection states, ensuring detection reliability, avoiding misjudgments due to circuit abnormalities, and making the detection results more accurate and reliable.

[0017] Enhancing the intuitiveness of testing: This invention utilizes a TFT LCD screen to visually display test results graphically. Compared to traditional multimeters that present measurement results numerically or via a buzzer, this device clearly displays the pin layout diagram of the DB9 male and female connectors on the screen, using different colors to intuitively indicate the continuity of each pin, and clearly showing the corresponding relationship between the male and female connector pins via cable connections with lines. Even non-professional operators can easily determine whether there is a problem with the communication cable, greatly reducing the need for professional knowledge from operators and minimizing misjudgments due to incorrect interpretation.

[0018] This utility model rapid detection system has low cost, simple and reasonable design, and is easy to promote and use in production. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the detection system of this utility model;

[0020] Figure 2 This is a connection diagram of the detection system of this utility model;

[0021] The attached diagram lists the components represented by each number as follows: 1. Arduino main control board; 2. Power supply; 3. First multiplexer; 4. Second multiplexer; 5. DB9 connector male socket protection circuit; 6. DB9 connector female socket logic level circuit; 7. DB9 connector male socket; 8. DB9 connector female socket; 9. TFT LCD screen. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please refer to the following: Figure 1 , Figure 2 ,in Figure 1 This is a schematic diagram of the detection system of this utility model; Figure 2 This is a connection diagram of the detection system of this utility model; as shown. Figure 1 , Figure 2 The present invention relates to a DB9 connector communication cable rapid testing system based on Arduino, comprising: Arduino main control board 1, power supply 2, first multiplexer 3, second multiplexer 4, DB9 connector male socket protection circuit 5, DB9 connector female socket logic level circuit 6, DB9 connector male socket 7, DB9 connector female socket 8, and TFT LCD display 9.

[0024] The power supply 2 is connected to the Arduino main control board 1, the first multiplexer 3, and the second multiplexer 4 respectively. The first multiplexer 3 and the second multiplexer 4 are connected to the Arduino main control board 1, the DB9 connector male socket protection circuit 5, and the DB9 connector female socket logic level circuit 6 respectively.

[0025] Specifically, the first output terminal of power supply 2 is electrically connected to the Arduino main control board 1; the second output terminal of power supply 2 is connected to the VCC pin of the first multiplexer 3 and the second multiplexer 4; pins 2, 3, 4, and 5 of the Arduino main control board 1 are connected to the S0, S1, S2, and S3 pins of the first multiplexer 3; pin 6 of the Arduino main control board 1 is connected to the SIG pin of the first multiplexer 3; and pins C0 to C8 of the first multiplexer 3 are protected by a DB9 connector male socket. Connect pins 1-9 of the DB9 connector male socket 7 to pin 5; connect pins 7, 8, 9, 10, and 11 of the Arduino main board 1 to pins S0, S1, S2, S3, and SIG of the second multiplexer 4; connect pins C0-C8 of the second multiplexer 4 to pins 1-9 of the DB9 connector female socket 6; connect the GND pins of the first multiplexer 3 and the second multiplexer 4 together to a common ground; connect the EN pins of the first multiplexer 3 and the second multiplexer 4 together to a common ground.

[0026] Furthermore, the Arduino main control board 1 is model Arduino UNO.

[0027] Furthermore, the first multiplexer 3 and the second multiplexer 4 are model CD74HC4067.

[0028] Furthermore, the DB9 connector male socket protection circuit 5 and the DB9 connector female socket logic level circuit 6 are used to limit the current to prevent damage to the main control board, ensure the stable operation of the detection circuit, further improve the accuracy of detection, avoid false triggering caused by signal uncertainty, and provide a clear level reference, enabling the detection circuit to distinguish between conduction and disconnection states, ensuring the reliability of detection, avoiding misjudgment caused by circuit abnormalities, and making the detection results more accurate and reliable.

[0029] Specifically, the DB9 connector male socket protection circuit 5 includes current-limiting resistors R1 to R9.

[0030] Furthermore, resistors R1 to R9 are connected in series between pins 1 to 9 of the male socket 7 of the DB9 connector and pins C0 to C8 of the first multiplexer 3.

[0031] Furthermore, the DB9 connector female socket logic level circuit 6 includes pull-up resistors R10 to R18, which are connected in parallel between the C0 to C8 pins of the second multiplexer 4 and the power supply 2. Specifically, one end of the pull-up resistors R9 to R18 is connected to the third output terminal of the power supply 2, and the other end is connected to the C0 to C8 pins of the second multiplexer 4.

[0032] Furthermore, it also includes a DB9 connector male socket 6 and a DB9 connector female socket 7; wherein, pins 1 to 9 of the DB9 connector male socket 5 are respectively connected to C0 to C8 of the first multiplexer 3 through the DB9 connector male socket protection circuit 5, and pins 1 to 9 of the DB9 connector female socket 6 are respectively connected to C0 to C8 of the second multiplexer.

[0033] Furthermore, it also includes a TFT LCD display 7. The power supply 2 and the Arduino main control board 1 are respectively connected to the TFT LCD display 7 for displaying the test results. Specifically, the fourth output terminal of the power supply 2 is connected to the VCC pin and LED pin of the TFT LCD display 7. The SDI pin, SCK pin, CS pin, DC pin, and RESET pin of the TFT LCD display 7 are respectively connected to the A0 pin, A1 pin, A2 pin, A3 pin, and A4 pin of the Arduino main control board 1. The GND pin of the TFT LCD display 7 is grounded.

[0034] Furthermore, the TFT LCD display screen 7 is model ILI9341.

[0035] The specific process of applying this utility model in practice is as follows:

[0036] Power is turned on (2). The Arduino main control board 1 starts and initializes the first multiplexer 3, the second multiplexer 4, and the TFT LCD display 7, preparing to enter the detection state. The male end of the DB9 communication cable to be measured is connected to the female socket 6 of the DB9 connector, and the female end of the DB9 communication cable is connected to the male socket 5 of the DB9 connector. The system starts automatic detection. The Arduino main control board 1 selects each pin of the male end in sequence through the first multiplexer 3 and outputs a low-level signal to the corresponding pin. At the same time, it selects each pin of the female end through the second multiplexer 4, reads the input level status, and determines whether the corresponding pins of the male and female ends are connected. When it is detected that all pins of the cable are connected and there is no abnormal short circuit, the Arduino main control board 1 will display the detection results on the TFT LCD display 7 in the form of line graphs to show the connection status of the corresponding pins of the male and female ends.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An Arduino-based DB9 connector communication cable quick detection system, comprising: An Arduino main control board (1) is characterized in that it further includes a power supply (2), a first multiplexer (3), a second multiplexer (4), a DB9 connector male socket protection circuit (5), a DB9 connector female socket logic level circuit (6), a DB9 connector male socket (7), and a DB9 connector female socket (8); the power supply (2) is connected to the Arduino main control board (1), the first multiplexer (3), and the second multiplexer (4) respectively; the first multiplexer (3) and the second multiplexer (4) are connected to the Arduino main control board (1), the DB9 connector male socket protection circuit (5), and the DB9 connector female socket logic level circuit (6) respectively; the DB9 connector male socket (7) is connected to the first multiplexer (3) through the DB9 connector male socket protection circuit (5); and the DB9 connector female socket is connected to the second multiplexer (4).

2. The Arduino-based DB9 connector communication cable quick detection system of claim 1, wherein, The DB9 connector male socket protection circuit (5) is connected in series between the first multiplexer (3) and the DB9 connector male socket (7); the DB9 connector female socket logic level circuit (6) is connected in parallel between the second multiplexer (4) and the power supply (2).

3. The Arduino-based DB9 connector communication cable quick detection system of claim 2, wherein, The DB9 connector male socket protection circuit (5) includes current limiting resistors R1 to R9; the DB9 connector female socket logic level circuit (6) includes pull-up resistors R10 to R18.

4. The Arduino-based DB9 connector communication cable quick detection system of claim 3, wherein, The current-limiting resistor of the DB9 connector male socket protection circuit (5) is used to limit the current magnitude; the pull-up resistor of the DB9 connector female socket logic level circuit (6) is used to determine the initial level and establish a reference voltage, avoid false triggering caused by signal uncertainty and provide a clear level reference, so that the detection circuit can distinguish between the on and off states.

5. The Arduino-based DB9 connector communication cable quick detection system of claim 1, wherein, It also includes a TFT LCD screen (9), and the power supply (2) and the Arduino main control board (1) are respectively connected to the TFT LCD screen (9); the TFT LCD screen (9) is connected to the Arduino main control board (1) to display the detection results.

6. The Arduino-based DB9 connector communication cable quick detection system of claim 5, wherein, The test results show the continuity status of the male and female pins of the DB9 connector, and the corresponding relationship between the male and female pins via cable connection is shown by connecting lines.

Images