Flat cable connectivity detection method and device

Abstract

The invention relates to the technical field of display screen testing, and provides a flat cable connectivity detection method and device, a detection network is established based on all NC PINs, and the detection network comprises a detection network arranged in an FOG FPC socket; one end of the partial pressure detection circuit is connected with the detection network, the other end of the partial pressure detection circuit is used as a feedback pin to be connected with the main controller, and the partial pressure detection circuit is used for acquiring a voltage sampling value of an NC PIN pin of the FOG FPC socket; the change of the short-circuit internal resistance between the unused NC PIN and the adjacent PIN is converted into voltage change to realize detection, and most FOGs can be compatible; before the load is electrified, voltage division detection is carried out based on the detection network so as to judge whether the FOG flat cable is normally inserted, and then the FOG FPC flat cable is detected to be inserted askew, so that the damage of FOG high voltage and negative voltage short circuit large current caused by electrification after the FOG FPC flat cable is inserted askew by production personnel is effectively avoided, and the universality and the compatibility are good.

Description

Technical Field

[0001] The present invention relates to the technical field of display screen testing, and in particular to a method and device for detecting the connectivity of a flat cable. Background Art

[0002] The PCBA used in current electronic devices is developing towards miniaturization and lightweight, but the number of PINs of the socket connectors used is increasing and the spacing is getting smaller and smaller. In the process of installing the screen cable in the production process, it is easy for the production staff to insert the cable and the FPC socket crookedly. When the FPC socket is buckled, the PIN pins of the cable are short-circuited with each other. The short circuit between different networks will cause damage to the cable or burns to the screen body during the power-on process or aging process. Therefore, the design of an anti-skewing detection circuit can effectively reduce the damage rate of products burned due to crooked cable insertion by production staff and the defective rate of products flowing out of the market.

[0003] To solve the above problems, the existing solutions are mainly as follows:

[0004] Test signal pins are specially designed at the edge PINs of multiple sockets. The test signal (such as PWM) is input from the leftmost signal pin of the first socket, and the signal network is connected to the load on the cable side (such as the screen FOG), and then returned from the cable to the rightmost signal pin of the first socket; in this order, it is connected to the rightmost PIN pin of the Nth socket, and then connected to another IO of the MCU main controller for detection.

[0005] With the above technical solution, each socket needs to occupy 2 PIN definitions, and the signal definition needs to be negotiated with the load end (such as the display FOG). It can only be used for loads with newly designed PIN definitions, so it is not very universal and compatible. Summary of the invention

[0006] The present invention provides a method and device for detecting the connectivity of a cable arrangement, which solves the technical problems of poor versatility and compatibility caused by complex detection steps of an existing anti-distortion detection circuit.

[0007] In order to solve the above technical problems, the present invention provides a method for detecting the connectivity of a cable, comprising:

[0008] Obtain the NC PIN pins of the FOG FPC socket, and establish a detection network based on all the NC PIN pins;

[0009] Connect the FOG FPC socket to the load end and keep the load end in an empty state;

[0010] Performing voltage division detection on the detection network to obtain a feedback voltage;

[0011] According to the feedback voltage and the preset threshold, it is determined whether the FOG cable is inserted normally. If so, the subsequent power supply module is driven to supply power to the load end; otherwise, the load end is kept in an idle state.

[0012] This basic solution establishes a detection network based on all the NC PIN pins, and uses the change in short-circuit internal resistance between the unused NC PIN and the adjacent PIN to convert it into voltage change for detection, which is compatible with most FOGs; before the load is powered on, a voltage division detection is performed based on the detection network to determine whether the FOG cable is inserted normally, and then the FOG FPC cable is crookedly inserted. This effectively avoids the damage of the FOG high voltage, negative pressure short circuit and large current caused by the production staff inserting the FOG FPC cable crookedly, and the power is turned on. It has good versatility and strong compatibility.

[0013] In a further embodiment, the NC PINs of the FOG FPC sockets are obtained, and a detection network is established based on all the NC PINs, including:

[0014] Get the NC PIN pin of the FOG FPC socket, connect all the NC PIN pins in parallel to establish a detection network, connect the parallel node as one end of the detection network to the voltage divider detection circuit, and connect the feedback pin of the voltage divider detection circuit to the voltage sampling end of the main controller for voltage divider detection.

[0015] This solution is based on the idle NC PIN pins, which are connected in parallel to form a detection network. In conjunction with the actual inserted and connected load, when the functional pins of the FOG FPC socket are normally connected, the detection network is suspended and no equivalent resistance is connected; when the functional pins of the FOG FPC socket are abnormally connected, the load internal resistance is connected through the detection network, thereby changing the resistance value of the voltage divider detection circuit. In this way, the voltage value collected by the voltage sampling end of the main controller can determine whether the FOG cable insertion is normal. The detection logic is simple and the detection efficiency is high. It will not affect the connection of the FOG cable function pins and is easy to operate.

[0016] In a further embodiment, the FOG FPC socket is connected to the load end, and the load end is kept in an empty state, including:

[0017] Connect the FOG FPC socket to the load end so that the PIN pin of the FOG FPC socket is connected to the corresponding functional pin of the load end; drive the subsequent power supply module to keep the power cut-off state, the load at the load end has no power input, and keep the load end in an idle state.

[0018] In the anti-distortion detection, this solution keeps the load end in an empty state, and detects abnormal docking before power is turned on, thereby avoiding the burning of components due to abnormal docking after power is turned on, and further ensuring the safety of equipment and personnel.

[0019] In a further embodiment, judging whether the FOG cable is inserted normally according to the feedback voltage and the preset threshold, and if so, driving the subsequent power supply module to supply power to the load end; otherwise, keeping the load end in an idle state includes:

[0020] The feedback voltage is compared to see whether it is consistent with a preset threshold value. If so, it is determined that the FOG cable is inserted normally, and the subsequent power supply module is driven to supply power to the load end; if not, it is determined that the detection network is connected to the function pin of the load at the load end, so that the load internal resistance is connected in series with the detection network to form an equivalent resistance, and the FOG cable is judged to be inserted abnormally, and the load end is kept in an idle state.

[0021] This solution directly compares the feedback voltage with the preset threshold to determine whether the FOG cable is inserted normally. It can quickly determine docking abnormalities with high detection sensitivity.

[0022] In a further implementation scheme, the feedback voltage is compared to see whether it is consistent with a preset threshold, specifically: the difference between the feedback voltage and the preset threshold is calculated, and it is determined whether the difference is within the fluctuation range. If so, repeated verification is performed, the current feedback voltage is re-acquired and the difference calculation is performed. If the repeated verification is successful, it is determined that the feedback voltage is consistent with the above-mentioned preset threshold, otherwise it is determined that the feedback voltage is inconsistent with the preset threshold.

[0023] This solution adds a repeated verification step when comparing whether the feedback voltage is consistent with the preset threshold value. Through multiple continuous verifications, abnormal data interference can be avoided and anti-shake can be performed.

[0024] In a further embodiment, it also includes: when it is determined that the FOG cable is inserted abnormally, triggering an alarm module to sound and light an alarm.

[0025] This solution adds an abnormal alarm step to remind users to troubleshoot in time.

[0026] The present invention also includes a wiring connectivity detection device, which is used to implement the wiring connectivity detection method as described above, including:

[0027] A detection network is provided in the FOG FPC socket;

[0028] A voltage-dividing detection circuit, one end of which is connected to the detection network, and the other end of which is connected to the main controller as a feedback pin, for obtaining a voltage sampling value of the NC PIN pin of the FOG FPC socket;

[0029] The main controller is used to determine whether the FOG cable is inserted normally according to the feedback voltage and a preset threshold value, and if so, drive the subsequent power supply module to supply power to the load end; if not, keep the load end in an idle state;

[0030] A rear power supply module connected to the FOG FPC socket and the main controller;

[0031] The alarm module is connected to the main controller and is used for reminding the insertion of the FOG cable and for sounding and visually alarming when it is determined that the insertion of the FOG cable is abnormal.

[0032] In a further embodiment, the detection network includes all NC PIN pins in the FOG FPC socket, all the NC PIN pins are connected in parallel to establish a detection network, and the parallel nodes of the detection network are connected to the voltage division detection circuit.

[0033] In a further implementation scheme, the voltage division detection module includes a first resistor R1, a second resistor R2, a third resistor R3, a first diode D1 and a second diode D2; one end of the first resistor R1 is connected to the power supply end, and the other end is grounded through the second resistor R2; one end of the third resistor R3 is connected to the other end of the first resistor R1, and the other end is connected to the voltage sampling end of the main controller as a feedback pin; the positive electrode of the first diode D1 is connected to the voltage sampling end of the main controller, and the negative electrode is connected to the power supply end; the positive electrode of the second diode D2 is grounded, and the negative electrode is connected to the voltage sampling end of the main controller;

[0034] The detection network is connected to the other end of the first resistor R1.

[0035] This solution uses a simple voltage divider circuit to perform anti-distortion detection, which has a simple device and low manufacturing cost. In conjunction with the first diode D1 and the second diode D2, when the detection network is short-circuited at a high voltage or a negative voltage power supply, voltage clamping is performed to ensure the data acquisition stability of the main controller.

[0036] In a further implementation scheme, the alarm module includes a serializer, an LCD display, a buzzer, and an MCU microcontroller unit. The MCU microcontroller unit is connected to the serializer, the LCD display, and the buzzer, and the serializer is connected to the main controller.

[0037] This solution uses a serializer to accept instructions from the main controller, and simultaneously triggers the LCD display and buzzer through the MCU microcontroller unit to display and remind alarms, which can promptly remind users to take action and ensure stable operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a workflow diagram of a wiring connectivity detection method provided by an embodiment of the present invention;

[0039] Figure 2 is a parallel schematic diagram of a detection network provided by an embodiment of the present invention;

[0040] Figure 3 It is a module connection diagram of a wiring connectivity detection device provided by an embodiment of the present invention;

[0041] Figure 4 The embodiment of the present invention provides Figure 3 System framework diagram;

[0042] Figure 5 The embodiment of the present invention provides Figure 3 Hardware circuit diagram of the medium voltage detection module. DETAILED DESCRIPTION

[0043] The following specifically illustrates the implementation mode of the present invention in conjunction with the accompanying drawings. The embodiments are provided for illustrative purposes only and cannot be understood as limiting the present invention. The accompanying drawings are provided for reference and illustration only and do not constitute a limitation on the scope of patent protection of the present invention, because many changes can be made to the present invention without departing from the spirit and scope of the present invention.

[0044] Example 1

[0045] An embodiment of the present invention provides a method for detecting the connectivity of a cable. Figure 1 As shown, in this embodiment, it includes:

[0046] S1. Obtain the NC PIN pins of the FOG FPC socket, and establish a detection network based on all the NC PIN pins, including:

[0047] Get the NC PIN pin of the FOG FPC socket (i.e., an idle pin with undefined electrical signals), connect all the NCPIN pins in parallel to establish a detection network, connect the parallel node as one end of the detection network to the voltage divider detection circuit, and connect the feedback pin of the voltage divider detection circuit to the voltage sampling end of the main controller for voltage divider detection.

[0048] like Figure 2 As shown, the FPC socket connects the unused NC PIN pins (2, 3, 5, 6, 10, 32, 40, 44, 88, 95, 97, 101, 103, 104, 109, 111, 115, 116, 118, 119) together to form the FPC DET1 detection network.

[0049] This embodiment is based on the idle NC PIN pins, which are connected in parallel to form a detection network. In conjunction with the actual inserted and connected load, when the functional pins of the FOG FPC socket are normally connected, the detection network is suspended and no equivalent resistance is connected; when the functional pins of the FOG FPC socket are abnormally connected, the internal resistance of the load is connected through the detection network, thereby changing the resistance value of the voltage divider detection circuit. In this way, the voltage value collected by the voltage sampling end of the main controller can determine whether the FOG cable insertion is normal. The detection logic is simple and the detection efficiency is high. It will not affect the connection of the functional pins of the FOG cable, and the operation is convenient.

[0050] S2. Connect the FOG FPC socket to the load end and keep the load end in an empty state, including:

[0051] Connect the FOG FPC socket to the load end so that the PIN pin of the FOG FPC socket is connected to the corresponding functional pin of the load end; drive the subsequent power supply module to keep the power cut-off state, the load at the load end has no power input, and keep the load end in an idle state.

[0052] In the anti-distortion detection of this embodiment, the load end is kept in an idle state, and the abnormal connection is detected before power is supplied, thereby avoiding the burning of components due to abnormal connection after power is supplied, and further ensuring the safety of equipment and personnel.

[0053] S3, performing voltage division detection on the detection network to obtain feedback voltage;

[0054] Specifically, the voltage-dividing detection circuit is powered on, and the main controller performs voltage-dividing detection on the detection network from the voltage sampling end to obtain the feedback voltage.

[0055] S4, judging whether the FOG cable is inserted normally according to the feedback voltage and the preset threshold value, and if so, driving the subsequent power supply module to supply power to the load end; if not, keeping the load end in an idle state, including:

[0056] The feedback voltage is compared to see whether it is consistent with a preset threshold value. If so, it is determined that the FOG cable is inserted normally, and the subsequent power supply module is driven to supply power to the load end; if not, it is determined that the detection network is connected to the function pin of the load at the load end, so that the load internal resistance is connected in series with the detection network to form an equivalent resistance, and the FOG cable is judged to be inserted abnormally, and the load end is kept in an idle state.

[0057] This embodiment directly compares the feedback voltage with a preset threshold value to determine whether the FOG cable is inserted normally, and can quickly determine docking abnormalities with high detection sensitivity.

[0058] In this embodiment, the feedback voltage is compared to see whether it is consistent with the preset threshold, specifically: the difference between the feedback voltage and the preset threshold is calculated, and it is determined whether the difference is within the fluctuation range. If so, repeated verification is performed, the current feedback voltage is re-acquired and the difference calculation is performed. If the repeated verification is successful, it is determined that the feedback voltage is consistent with the above-mentioned preset threshold, otherwise it is determined that the feedback voltage is inconsistent with the preset threshold.

[0059] For example, a 1.65V voltage is input to the main controller using a 3.3V voltage divider. The main controller converts the feedback voltage 1.65V into an 8-bit AD value 127. The main controller compares the obtained AD value with the set value of 117 to 137 (±10) for range interval judgment. The verification process is repeated 10 times, and the 10 tests are used for anti-shake.

[0060] During the 10 tests:

[0061] 1) If the FPC_AD value is within the set range, a power-on command will be sent to the subsequent power supply module to supply power to the load (such as a display screen), and a correct insertion command will be sent to the alarm module at the same time;

[0062] 2) If the FPC_AD value is not within the set range, the main controller will not send a power-on command, and will send an insertion error command to the alarm module.

[0063] In this embodiment, when comparing whether the feedback voltage is consistent with the preset threshold, a repeated verification step is added. Through multiple continuous verifications, abnormal data interference can be avoided and anti-shake can be performed.

[0064] S5. When it is determined that the FOG cable is inserted abnormally, the alarm module is triggered to sound and light alarm.

[0065] This embodiment adds an abnormal alarm step to promptly remind the user to perform troubleshooting.

[0066] The embodiment of the present invention establishes a detection network based on all the NC PIN pins, and realizes detection by converting the change of the short-circuit internal resistance between the unused NC PIN and the adjacent PIN into a voltage change, which can be compatible with most FOGs; before the load is powered on, a voltage division detection is performed based on the detection network to determine whether the FOG cable is inserted normally, and then the FOG FPC cable is crookedly inserted. This effectively avoids the damage of the FOG high voltage, negative pressure short circuit and large current caused by the production personnel inserting the FOG FPC cable crookedly, and the damage is good in versatility and compatibility.

[0067] Example 2

[0068] The reference numerals in the accompanying drawings of the present embodiment include: a detection network 1 , a voltage division detection circuit 2 , a main controller 3 , a rear-stage power supply module 4 , and an alarm module 5 .

[0069] The present invention also includes a wiring connectivity detection device for implementing the wiring connectivity detection method as described above, see Figure 3 , Figure 4 , Figure 5 ,include:

[0070] A detection network 1 is provided in the FOG FPC socket;

[0071] A voltage-dividing detection circuit 2, one end of which is connected to the detection network 1, and the other end of which is connected to the main controller 3 as a feedback pin, for obtaining a voltage sampling value of the NC PIN pin of the FOG FPC socket;

[0072] The main controller 3 is used to determine whether the FOG cable is inserted normally according to the feedback voltage and the preset threshold value, and if so, drive the subsequent power supply module 4 to supply power to the load end; otherwise, keep the load end in an idle state;

[0073] A rear power supply module 4 is connected to the FOG FPC socket and the main controller 3;

[0074] The alarm module 5 is connected to the main controller 3 and is used for reminding the user to insert the FOG cable. The alarm module 5 is also used for sound and light alarm when the user detects that the FOG cable is inserted abnormally.

[0075] In this embodiment, the detection network 1 includes all NC PIN pins in the FOG FPC socket, and all the NC PIN pins are connected in parallel to establish the detection network 1 , and the parallel nodes of the detection network 1 are connected to the voltage division detection circuit 2 .

[0076] In this embodiment, the voltage division detection module includes a first resistor R1, a second resistor R2, a third resistor R3, a first diode D1 and a second diode D2; one end of the first resistor R1 is connected to the power supply end, and the other end is grounded through the second resistor R2; one end of the third resistor R3 is connected to the other end of the first resistor R1, and the other end is connected to the voltage sampling end of the main controller 3 as a feedback pin; the positive electrode of the first diode D1 is connected to the voltage sampling end of the main controller 3, and the negative electrode is connected to the power supply end; the positive electrode of the second diode D2 is grounded, and the negative electrode is connected to the voltage sampling end of the main controller 3;

[0077] The detection network 1 is connected to the other end of the first resistor R1 .

[0078] This embodiment uses a simple voltage divider circuit to perform anti-distortion detection, the device is simple and the manufacturing cost is low; in conjunction with the first diode D1 and the second diode D2, when the detection network 1 is short-circuited at a high voltage or a negative voltage power supply, voltage clamping is performed, thereby ensuring the data acquisition stability of the main controller 3.

[0079] In this embodiment, the alarm module 5 includes a serializer, an LCD display, a buzzer, and an MCU microcontroller unit. The MCU microcontroller unit is connected to the serializer, the LCD display, and the buzzer. The serializer is connected to the main controller 3.

[0080] The main controller 3 packages the instructions to the deserialization chip, and the deserialization chip transmits the instructions output by the main controller 3 to the alarm module 5 through coaxial or differential signals. After receiving the instructions from the main controller 3, the alarm module 5 executes the LCD display to display whether the FPC cable is inserted correctly or incorrectly, and the buzzer uses long and short beeps to distinguish between correct and incorrect insertion reminders. The serializer reads the packaged data of the deserializer through coaxial or differential signals. The MCU microcontroller is used to drive the LCD display to display and control the length of the buzzer's whistle.

[0081] This embodiment uses a serializer to receive instructions from the main controller 3, and simultaneously triggers the LCD display screen and buzzer through the MCU microcontroller unit to display and remind alarms, which can promptly remind the user to take action and ensure stable operation of the equipment.

[0082] In this embodiment, the back-end power supply module 4 includes a positive and negative voltage chip and a step-down power supply chip, and the main controller 3 is used to control the positive and negative voltage chips and the step-down power supply chip to be turned on and off. The positive and negative voltage chips are used to provide the display screen with VSP, VSN, VGH, VGH, and VGL power supplies. The step-down power supply chip is used to provide the display screen with VDD power supply.

[0083] like Figure 5 , taking 3.3V voltage as an example, the working principle of this embodiment is as follows:

[0084] (1) The first resistor R1 and the second resistor R2 divide the D3V3 power supply FPC_DET1 into a voltage of 1.65V. The FPC_DET voltage is equal to 1.65V.

[0085] Vfpc_det=3.3V*(R1*R2) / (R1+R2)=1.65V

[0086] (2) FPC_DET1 is connected to the IO port (ie, the voltage sampling terminal) of the main controller 3 through the third resistor R3 to limit the high current of FPC_DET to protect the main controller 3.

[0087] (3) When FPC_DET1 is deflected and short-circuited to the NC PIN pin (detection network 1), the second resistor R2 will be connected in parallel with the internal resistance RTFT of the display to form R2', thereby causing the Vfpc_det voltage to change.

[0088] R57'=(R2*RTFT) / (R2+RFTT), let RTFT=40K;

[0089] Vfpc_det=3.3V*(R1*R2') / (R1+R2')=0.73V

[0090] (4) When FPC_DET1 shorts the high voltage power supply, the VGH (13V) and VSP (8V) power supplies are clamped at 4V through the D6IN4148W diode, protecting the IO port voltage from exceeding the maximum withstand voltage of the MCU microcontroller unit.

[0091] (5) When FPC_DET1 is short-circuited to the negative voltage power supply, the VGL (-13V) and VSN (-8V) power supplies are clamped at -0.7V through D7.

[0092] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A method for detecting the connectivity of a cable, characterized in that: include: Obtain the NC PIN pins of the FOG FPC socket, and establish a detection network based on all the NC PIN pins; Connect the FOG FPC socket to the load end and keep the load end in an empty state; Performing voltage division detection on the detection network to obtain a feedback voltage; According to the feedback voltage and the preset threshold, it is determined whether the FOG cable is inserted normally. If so, the subsequent power supply module is driven to supply power to the load end; otherwise, the load end is kept in an idle state.

2. A method for detecting the connectivity of a cable as claimed in claim 1, characterized in that: Get the NCPIN of the FOG FPC socket and build a detection network based on all the NC PINs, including: Get the NC PIN pin of the FOG FPC socket, connect all the NC PIN pins in parallel to establish a detection network, connect the parallel node as one end of the detection network to the voltage divider detection circuit, and connect the feedback pin of the voltage divider detection circuit to the voltage sampling end of the main controller for voltage divider detection.

3. A method for detecting the connectivity of a cable as claimed in claim 2, characterized in that: Connect the FOG FPC socket to the load end and keep the load end in an empty state, including: Connect the FOG FPC socket to the load end so that the PIN pin of the FOG FPC socket is connected to the corresponding functional pin of the load end; drive the subsequent power supply module to keep the power cut-off state, the load at the load end has no power input, and keep the load end in an idle state.

4. A method for detecting the connectivity of a cable as claimed in claim 3, characterized in that: The method of judging whether the FOG cable insertion is normal according to the feedback voltage and the preset threshold value, and if so, driving the subsequent power supply module to supply power to the load end; and if not, keeping the load end in an idle state, includes: The feedback voltage is compared to see whether it is consistent with a preset threshold value. If so, it is determined that the FOG cable is inserted normally, and the subsequent power supply module is driven to supply power to the load end; if not, it is determined that the detection network is connected to the function pin of the load at the load end, so that the load internal resistance is connected in series with the detection network to form an equivalent resistance, and the FOG cable is judged to be inserted abnormally, and the load end is kept in an idle state.

5. A method for detecting the connectivity of a cable as claimed in claim 4, characterized in that: Compare whether the feedback voltage is consistent with the preset threshold, specifically: calculate the difference between the feedback voltage and the preset threshold, determine whether the difference is within the fluctuation range, if so, repeat the verification, re-acquire the current feedback voltage and perform the difference calculation, if the repeated verification is successful, it is determined that the feedback voltage is consistent with the above-mentioned preset threshold, otherwise it is determined that the feedback voltage is inconsistent with the preset threshold.

6. A method for detecting the connectivity of a cable as claimed in claim 1, characterized in that: Also includes: When it is determined that the FOG cable is inserted abnormally, the alarm module is triggered to sound and light alarm.

7. A cable connectivity detection device, characterized in that: A method for detecting the connectivity of a wiring arrangement according to any one of claims 1 to 6, comprising: A detection network is provided in the FOG FPC socket; A voltage-dividing detection circuit, one end of which is connected to the detection network, and the other end of which is connected to the main controller as a feedback pin, for obtaining a voltage sampling value of the NC PIN pin of the FOG FPC socket; The main controller is used to determine whether the FOG cable is inserted normally according to the feedback voltage and a preset threshold value, and if so, drive the subsequent power supply module to supply power to the load end; if not, keep the load end in an idle state; A rear power supply module connected to the FOG FPC socket and the main controller; The alarm module is connected to the main controller and is used for reminding the insertion of the FOG cable and for sounding and visually alarming when it is determined that the insertion of the FOG cable is abnormal.

8. A cable connectivity detection device as claimed in claim 7, characterized in that: The detection network includes all NC PIN pins in the FOGFPC socket, and all the NC PIN pins are connected in parallel to establish the detection network, and the parallel nodes of the detection network are connected to the voltage division detection circuit.

9. The cable connectivity detection device according to claim 7, characterized in that: The voltage division detection module includes a first resistor R1, a second resistor R2, a third resistor R3, a first diode D1 and a second diode D2; one end of the first resistor R1 is connected to the power supply end, and the other end is grounded through the second resistor R2; one end of the third resistor R3 is connected to the other end of the first resistor R1, and the other end is connected to the voltage sampling end of the main controller as a feedback pin; the positive electrode of the first diode D1 is connected to the voltage sampling end of the main controller, and the negative electrode is connected to the power supply end; the positive electrode of the second diode D2 is grounded, and the negative electrode is connected to the voltage sampling end of the main controller; The detection network is connected to the other end of the first resistor R1.

10. The cable connectivity detection device according to claim 7, characterized in that: The alarm module includes a serializer, an LCD display, a buzzer, and an MCU microcontroller unit. The MCU microcontroller unit is connected to the serializer, the LCD display, and the buzzer. The serializer is connected to the main controller.

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