CN104459426A - Cable detection system - Google Patents

Abstract

A cable detection system comprises a circuit board, a programmable logic device arranged on the circuit board, a connector group arranged on the circuit board, and a display device. The connector group comprises a first connector and a second connector used for being connected with the two ends of a cable. The programmable logic device comprises a detection module and a storage module. The storage module stores the number of pins and the pin position relationship of different cables and model data corresponding to the number of pins and the pin position relationship of different cables. The detection module is used for detecting the current number of pins and the current pin position relationship of the cables, finding out the model data corresponding to the current number of pins and the current pin position relationship according to the current number of pins and the current pin position relationship, and displaying the model data on the display device. The cable detection system has a simple structure, and the cost of model data detection is saved.

Description

Cable Detection System

technical field

The invention relates to a detection system, in particular to a cable detection system.

Background technique

With the development of electronic information technology and signal integrity theory, and the advancement of Cable (cable) technology, the transmission speed of Cable is getting faster and faster, and the transmission loss is getting lower and lower, and its application in electronic products is becoming more and more popular. more and more widely. Therefore, dedicated Cable testing equipment can improve Cable testing and production efficiency. However, expensive and complicated cable testers are generally used for cable testing at present, and the production cost is high.

Contents of the invention

In view of the above, it is necessary to provide a cable detection system with simple structure and low detection cost.

A cable detection system, comprising a circuit board, a programmable logic device mounted on the circuit board, a connector group installed on the circuit board and a display device, the connector group includes The first connector and the second connector at both ends of the programmable logic device include a detection module and a storage module, and the storage module stores model data corresponding to different pin numbers and different pin position relationships , the detection module is used to detect the current number of pins and the current positional relationship between the pins of the cable between the two connectors, and according to the current number of pins and the current positional relationship between the pins The model data corresponding to the current number of pins and the positional relationship of the current pins are found from the storage module and displayed on the display device.

A further improvement is: the detection module includes a detection unit, a comparison unit and a control unit, the detection unit is used to detect the current number of pins and the current pin position relationship of the cable between the two connectors, The comparison unit is used to find model data corresponding to the current number of pins and the current positional relationship of the pins from the storage module according to the current number of pins and the current positional relationship of the pins, and sending the model data to the control unit, and the control unit is used to control displaying the model data on a display device.

A further improvement is: the first connector is connected to a power supply through a first resistor, the second connector is grounded through a second resistor, and the detection unit is also used to detect the first voltage value flowing through the first resistor and a second voltage value flowing through the second resistor, the control unit is used to calculate the impedance value of the cable based on the first voltage value and the second voltage value and set the impedance value displayed on the display device.

A further improvement is: the detection unit is also used to detect a third voltage value at both ends of the cable, and the control unit is used to judge that the cable is in a connected state when the third voltage value is not zero , and used for judging that the cable is disconnected when the third voltage value is zero.

A further improvement is: a first interface connected to the first connector and a second interface connected to the display device are installed on the circuit board, and the first interface and the second interface are connected to the display device respectively. Programming logic devices, the first voltage value and the second voltage value are transmitted to the detection unit through the first interface, and the impedance value is transmitted to the display device through the second interface.

A further improvement is: the first interface is an analog-to-digital converter port.

A further improvement is: a first interface connected to the first connector is installed on the circuit board, the first interface is connected to the programmable logic device, the number of the current pins and the number of the current pins The positional relationship is transmitted to the detection module through the first interface.

A further improvement is: the first interface is a general input and output port.

A further improvement is: the programmable logic device is a complex programmable logic device.

A further improvement is: the programmable logic device is a field programmable gate array.

In the above-mentioned cable detection system, the detection module detects the current number of pins and the current positional relationship of the pins, and selects from the stored The module finds out the model data corresponding to the current number of pins and the positional relationship of the current pins, so as to display the model data on the display device. The structure of the cable detection system is simple, thereby saving the cost of detecting cable model data.

Description of drawings

Fig. 1 is a hardware connection block diagram of a preferred embodiment of the cable detection system of the present invention.

Fig. 2 is a circuit connection diagram of a preferred embodiment of the cable detection system of the present invention.

Fig. 3 is a test principle diagram of a preferred embodiment of the cable detection system of the present invention.

Description of main component symbols

circuit board 10 power supply 11 first interface 13 second interface 15 third interface 17 Programmable Logic Device 20 Detection module twenty one detection unit 211 compare unit 213 control unit 215 storage module twenty three connector set 30 first connector 31 second connector 33 display screen 40 cable 50

The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings.

Detailed ways

Please refer to FIG. 1 , in a preferred embodiment of the present invention, a cable detection system includes a circuit board 10 for installation on an operating table (not shown in the figure), a circuit board 10 installed on the circuit board 10 The PLD 20 , a connector set 30 installed on the circuit board 10 and a display device 40 for connecting with the PLD 20 . In one embodiment, the programmable logic device 20 is a complex programmable logic device (Complex Programmable Logic Device, CPLD) or a field programmable gate array (Field-Programmable Gate Array, FPGA) chip.

A power supply 11 , a first interface 13 , a second interface 15 and a third interface 17 are mounted on the circuit board 10 .

The programmable logic device 20 includes a detection module 21 and a storage module 23 . The detection module 21 includes a detection unit 211 , a comparison unit 213 and a control unit 215 . The detecting unit 211 is used for detecting the number of different pins and the positional relationship of different pins of the cable 50 . The storage module 23 stores model data corresponding to the number of pins and the positional relationship of the pins of different cables 50 . The comparison unit 213 is used to find the model data corresponding to the current number of pins and the current positional relationship of the pins from the storage module 23 according to the current number of pins and the current positional relationship of the pins, and transmit the data to the control unit 215 . The control unit 215 is used for controlling the transmission and display of the model data on the display device 40 .

The connector set 30 includes a first connector 31 and a second connector 33 . The first connector 31 and the second connector 33 are used to connect two ends of a cable 50 .

1 and 2, the first interface 13 and the second interface 15 are connected to the first connector 31, the first interface 13 is connected to the programmable logic device 20, the second interface 15 is connected to the second connector 33, and the second interface 15 is also connected to the programmable logic device 20, the third interface 17 is connected to the display device 40 and the programmable logic device 20, the first connector 31 is connected to the power supply 11 through a resistor R1, and the second connector 33 is grounded through a resistor R2. In one embodiment, the first interface 13 is a general purpose input/output port (General Purpose Input Output, GPIO), the second interface 15 is an analog-digital converter (analog-digital converter, ADC) port, and the third interface 17 It is a display port.

During detection, the two ends of the cable 50 to be tested are respectively connected between the first connector 31 and the second connector 33, and the circuit board 10 and the programmable logic device 20 are powered on, and the second interface 15 connects the resistance R1 The first voltage value _U1 at both ends of the resistor R2, the second voltage value _U2 at both ends of the cable 50, and the third voltage value _U3 at both ends of the resistor R2 are sent to the detection unit 211 for detection, and the first interface 13 sends the cable 50 The current number of pins and the current position of the pins are sent to the detection unit 211 for detection, and the detection unit 211 sends the first voltage value U ₁ , the second voltage value U ₂ , and the third voltage value U ₃ to the control unit 215 and The current pin number and the current pin position relationship are sent to the comparison unit 213, and the comparison unit 213 is used to find out the corresponding current pin number and the current pin position relationship from the storage module 23 according to the current pin number and the current pin position relationship. The model data of the pin position relationship, and the model data is sent to the control unit 215, and the control unit 215 displays the model data on the display device 40 through the third interface 17, and the control unit 215 is not equal to the second voltage value _U2 . The cable 50 is judged to be in a connected state at zero time and the cable 50 is judged to be in a disconnected state when the first voltage value U ₂ is zero. The control unit 215 passes the first voltage value U ₁ , the second voltage value U ₂ and The impedance value R of the cable 50 is calculated from the three voltage values U ₃ , and the on-off state and the impedance value R are displayed on the display device 40 through the third interface 17 .

Please refer to Figure 3, the test principle of the cable detection system is:

S1: the programmable logic device 20 is powered on and initialized;

S3: the first interface 13 transmits the current number of pins and the current pin position relationship of the cable 50 to the detection unit 211 for detection;

S5: The detection unit 211 transmits the current number of pins and the current position relationship of the pins to the comparison unit 213;

S7: The comparison unit 213 finds the model data corresponding to the current number of pins and the current positional relationship of the pins from the storage module 23 according to the current number of pins and the current positional relationship of the pins, and transmits the model data to the control unit 215;

S9: The control unit 215 displays the model data on the display device 40 through the third interface 17 .

In another embodiment, after the programmable logic device 20 is powered on and initialized, the second interface 15 transfers the first voltage value U ₁ across the resistor R1 , the second voltage value U ₂ across the cable 50 , the resistor R2 The third voltage value U ₃ at both ends of the two ends is transmitted to the detection unit 211 for detection, and the detection unit 211 transmits the first voltage value U ₁ , the second voltage value U ₂ , and the third voltage value U ₃ to the control unit 215, and the control unit 215 When the second voltage value _U2 is not zero, it is judged that the cable 50 is in a connected state and when the first voltage value _U2 is zero, it is judged that the cable 50 is in a disconnected state, and the control unit 215 uses the first voltage value _U1 , the second voltage value U ₂ and the third voltage value U ₃ calculate the impedance value R of the cable 50 , and display the on-off state and the impedance value R on the display device 40 through the third interface 17 .

In the above cable detection system, the detection unit 211 detects and transmits the first voltage value U ₁ , the second voltage value U ₂ and the third voltage value U ₃ to the control unit 215, and detects and transmits the current pin number of the cable 50 number and the current pin position relationship to the comparison unit 213, and the comparison unit 213 finds out the model data corresponding to the current pin number and the current pin position relationship from the storage module 23 according to the current pin number and the current pin position relationship The model data is displayed on the display device 40 through the control unit 215, and the control unit 215 judges that the cable 50 is connected when the second voltage value _U2 is not zero and judges when the first voltage value _U2 is zero. The cable 50 is in the disconnected state, the control unit 215 calculates the impedance R of the cable 50 , and displays the on-off status and the impedance R on the display device 40 through the third interface 17 . The structure of the cable testing system is simple so as to save testing cost.

For those skilled in the art, other corresponding changes or adjustments can be made according to the inventive solution and the inventive concept of the present invention combined with the actual needs of production, and these changes and adjustments should all belong to the scope of the present invention.

Claims (10)

1. A cable detection system, comprising a circuit board and a programmable logic device mounted on the circuit board, characterized in that: the cable detection system also includes a connector group and a connector group mounted on the circuit board display device, the connector group includes a first connector and a second connector for connecting the two ends of the cable, the programmable logic device includes a detection module and a storage module, and the storage module stores a corresponding The number of pins of different cables and the model data of the pin position relationship, the detection module is used to detect the current number of pins and the current pin position relationship of the cable between the two connectors, and According to the current number of pins and the current positional relationship of the pins, model data corresponding to the current number of pins and the current positional relationship of the pins is found from the storage module and displayed on the display device. 2. The cable detection system according to claim 1, wherein the detection module includes a detection unit, a comparison unit and a control unit, and the detection unit is used to detect the current state of the cable between the two connectors. The number of pins and the current position relationship of pins, the comparison unit is used to find out from the storage module the corresponding current number of pins and the position relationship of the current pins. the model data of the current pin position relationship, and send the model data to the control unit, and the control unit is used to control the display of the model data on the display device. 3. The cable detection system according to claim 2, wherein the first connector is connected to a power supply through a first resistor, the second connector is grounded through a second resistor, and the detection unit is also used to detect current Through the first voltage value of the first resistor and the second voltage value flowing through the second resistor, the control unit is used to calculate the the impedance value of the cable and display the impedance value on the display device. 4. The cable detection system according to claim 3, characterized in that: the detection unit is also used to detect a third voltage value at both ends of the cable, and the control unit is used to detect when the third voltage value is not judging that the cable is in a connected state at zero time, and judging that the cable is in a disconnected state when the third voltage value is zero. 5. The cable detection system according to claim 3, characterized in that: a first interface connected to the first connector and a second interface connected to the display device are installed on the circuit board, the first interface and the second interface are respectively connected to the programmable logic device, the first voltage value and the second voltage value are transmitted to the detection unit through the first interface, and the impedance value is transmitted through the second The interface is transmitted to the display device. 6. The cable detection system according to claim 5, wherein the first interface is an analog-to-digital converter port. 7. The cable detection system according to claim 1, wherein a first interface connected to the first connector is installed on the circuit board, the first interface is connected to the programmable logic device, and the The current number of pins and the current position relationship of the pins are transmitted to the detection module through the first interface. 8. The cable detection system according to claim 7, characterized in that: the first interface is a general input and output port. 9. The cable detection system according to claim 1, characterized in that: said programmable logic device is a complex programmable logic device. 10. The cable detection system according to claim 1, characterized in that: said programmable logic device is a field programmable gate array.