Multifunctional cable test tool based on FPGA

Abstract

The utility model relates to the technical field of cable detection, and discloses a multifunctional cable test tool based on an FPGA (Field Programmable Gate Array), and the FPGA U1 is connected with a first serial port transmitter U2 and a second serial port transmitter U5; the FPGA U1 is connected with a first differential receiver U3 and a second differential transceiver U6; the FPGA U1 is also connected with a first isolator U4 and a second isolator U7; one end of the first serial port transmitter U2 is also connected with a 10pin plug connector A, and meanwhile, the first differential receiver U3 and the first isolator U4 are connected with the 10pin plug connector A; and one end of the second serial port transmitter U5 is also connected with a 10-pin plug connector B. According to the utility model, four 10-core cables can be detected at the same time, detection signals comprise common serial port signals, differential signals and single-ended signals, the compatibility is good, the on-off condition of the cables and the communication quality condition can be visually displayed through the indicating lamps, the time required for detection is greatly shortened, and the detection efficiency is improved. And the FPGA can be flexibly configured to meet different test requirements while the detection quality is improved.

Description

Technical Field

[0001] The utility model relates to the field of cable detection, in particular to a multifunctional cable testing tool based on FPGA. Background Art

[0002] In actual manufacturing, the production of cables for various instruments and equipment is indispensable. However, how to ensure that the quality of the cables produced is reliable and meets the standards? At present, the main method is to detect the continuity of the cables, and there is a lack of professional equipment for more professional communication quality testing.

[0003] The variety of cable types, lengths, and transmission signals often leads to a wide variety of test equipment and a surge in costs. At the same time, manual testing will greatly reduce testing efficiency, and the purchase of related equipment will also increase costs. Summary of the Invention

[0004] In order to solve the technical problem of high cost and non-standardization of testing of cables of different models, the utility model provides a multifunctional cable testing tool based on FPGA.

[0005] The utility model adopts the following technical solutions to achieve: a multifunctional cable testing tool based on FPGA, including a main chip FPGAU1,

[0006] The FPGA U1 is connected to a first serial port transmitter U2 and a second serial port transmitter U5;

[0007] The FPGA U1 is connected to a first differential receiver U3 and a second differential transceiver U6;

[0008] The FPGA U1 is also connected to a first isolator U4 and a second isolator U7;

[0009] One end of the first serial port transmitter U2 is also connected to a 10-pin connector A, and the first differential receiver U3 and the first isolator U4 are connected to the 10-pin connector A;

[0010] One end of the second serial port transmitter U5 is also connected to a 10-pin connector B, and the second differential transceiver U6 and the second isolator U7 are connected to the 10-pin connector B;

[0011] The FPGAU1 is connected to a power supply and a power switch k1.

[0012] As a further improvement of the above solution, an on / off indicator light D1 and a signal quality indicator light D2 are electrically connected between the second serial port transmitter U5 , the second differential transceiver U6 , the second isolator U7 and the 10-pin connector B.

[0013] As a further improvement of the above solution, the models of the first serial port transmitter U2 and the second serial port transmitter U5 are MAX3488XX.

[0014] As a further improvement of the above solution, the second differential transceiver U6 adopts the model MAX3032XX.

[0015] As a further improvement of the above solution, the differential transceiver U3 adopts the model SN65LVDS.

[0016] As a further improvement of the above solution, the first isolator U4 and the second isolator U7 adopt the model SN74AC.

[0017] As a further improvement of the above solution, the main chip FPGAU1 adopts the model of Xilinx Spartan-6.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] This utility model can detect 4 10-core cables at the same time. The detection signals include common serial port signals, differential signals and single-ended signals. It has good compatibility and can visually display the cable connection and communication quality through indicator lights, greatly shortening the detection time and improving the detection quality. At the same time, it can also flexibly configure FPGA to meet different test requirements and reduce detection costs. By comparing the signals sent and received by FPGA, the communication quality can be monitored in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a functional diagram of the utility model. DETAILED DESCRIPTION

[0021] Below, the present invention is further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0022] Please combine Figure 1 , a multifunctional cable testing tool based on FPGA in this embodiment includes a main chip FPGAU1, a first serial port transmitter U2 and a second serial port transmitter U5, a first differential receiver U3 and a second differential transceiver U6, a first isolator U4 and a second isolator U7;

[0023] It also includes a 10-pin connector A and a 10-pin connector B. At the same time, the main chip FPGAU1 is connected to a power supply and a power switch k1, and the power supply is used to power the main chip FPGAU1.

[0024] Specifically, the main chip FPGAU1 uses the Xilinx Spartan-6 model, which is powerful, technologically mature and low-cost as the receiver and generator. The chip can be flexibly configured to meet the requirements of different test signals, improving the test function while greatly reducing the hardware cost of the test.

[0025] The models of the first serial port transmitter U2 and the second serial port transmitter U5 are MAX3488XX. The first serial port transmitter U2 and the second serial port transmitter U5 can realize the functions of single-ended to differential and differential to single-ended. The first serial port transmitter U2 is connected between the 10-pin connector A and the main chip FPGAU1; the second serial port transmitter U5 is connected between the 10-pin connector B and the main chip FPGAU1, which is used for signal conversion and can enhance the signal's anti-interference ability.

[0026] The second differential transceiver U6 adopts the model MAX3032XX and is connected between the main chip FPGAU1 and the 10-pin connector B. It converts the clock signal and data signal into differential signals, making them less susceptible to external signal interference during cable transmission.

[0027] The differential transceiver U3 adopts the model SN65LVDS, which is connected between the main chip FPGAU1 and the 10-pin connector A. It converts the four-way differential signal into two-way single-ended signal to send to the main chip FPGAU1 for data reception.

[0028] The first isolator U4 and the second isolator U7 are of model SN74AC. The first isolator U4 is connected between the 10-pin connector A and the main chip FPGAU1; the second isolator U7 is connected between the 10-pin connector B and the main chip FPGAU1 to enhance and isolate the signal.

[0029] In addition, an on / off indicator light D1 and a signal quality indicator light D2 are electrically connected between the second serial port transmitter U5, the second differential transceiver U6, the second isolator U7 and the 10-pin connector B;

[0030] The on / off indicator light D1 and the signal quality indicator light D2 can visually display the cable on / off status and communication quality, shortening the detection time.

[0031] The 10-pin connector A and the 10-pin connector B are interface A and interface B, which are referred to as interface A and interface B below. That is, the two ends of the cable to be tested are connected to interface A and interface B respectively.

[0032] The implementation process and principle of a multifunctional cable testing tool based on FPGA in the embodiment of the present application are as follows:

[0033] 1: The main chip FPGAU1 can be configured to output fixed eight-bit binary data, which is then transmitted to the built-in chip of the second serial port transmitter U5. The second serial port transmitter U5 converts the received data into a standard RS232 serial port signal and outputs it to interface A.

[0034] Second: After the serial data is transmitted from interface A to interface B, the first serial port transmitter U2 receives the RS232 serial signal and converts it into eight-bit binary. The main chip FPGA U1 can determine whether there is any data loss by comparing the binary data sent and received. It then displays the cable communication quality by controlling the on / off frequency of the on / off indicator D1 and the signal quality indicator D2.

[0035] 3: The differential signal is sent by the main chip FPGAU1 and driven by the second differential transceiver U6 and sent to interface B, then transmitted to interface A by the cable to be detected, and finally received by the first differential receiver U3 and sent to the main chip FPGAU1.

[0036] 4: The main chip FPGAU1 detects and verifies the received differential signal, and finally displays the cable communication quality by controlling the on and off frequency of the on / off indicator light D1 and the signal quality indicator light D2.

[0037] 5. Single-ended signal detection can be used to detect the continuity of any cable. Specific binary data sent by the main chip FPGAU1 passes through the isolation device and then the cable and is sent to the main chip FPGAU1 for data verification, and finally the indicator light is turned on and off.

[0038] This utility model can detect 4 10-core cables at the same time. The detection signals include common serial port signals, differential signals and single-ended signals. It has good compatibility and can visually display the cable connection and communication quality through indicator lights, greatly shortening the detection time and improving the detection quality. At the same time, it can also flexibly configure FPGA to meet different test requirements and reduce detection costs. By comparing the signals sent and received by FPGA, the communication quality can be monitored in real time.

[0039] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A multifunctional cable testing tool based on FPGA, comprising a main chip FPGA (U1), characterized in that: The FPGA (U1) is connected to a first serial port transmitter (U2) and a second serial port transmitter (U5); The FPGA (U1) is connected to a first differential receiver (U3) and a second differential transceiver (U6); The FPGA (U1) is also connected to a first isolator (U4) and a second isolator (U7); One end of the first serial port transmitter (U2) is also connected to a 10-pin connector A, and the first differential receiver (U3) and the first isolator (U4) are connected to the 10-pin connector A; One end of the second serial port transmitter (U5) is also connected to a 10-pin connector B, and the second differential transceiver (U6) and the second isolator (U7) are connected to the 10-pin connector B; The FPGA (U1) is connected to a power supply and a power switch (k1).

2. The multifunctional cable testing tool based on FPGA according to claim 1, characterized in that: An on / off indicator light (D1) and a signal quality indicator light (D2) are electrically connected between the second serial port transmitter (U5), the second differential transceiver (U6), the second isolator (U7) and the 10-pin connector B.

3. The multifunctional cable testing tool based on FPGA according to claim 1, characterized in that: The models of the first serial port transmitter (U2) and the second serial port transmitter (U5) are MAX3488XX.

4. The multifunctional cable testing tool based on FPGA according to claim 1, characterized in that: The second differential transceiver (U6) is a MAX3032XX model.

5. The multifunctional cable testing tool based on FPGA according to claim 1, characterized in that: The differential transceiver (U3) adopts the model SN65LVDS.

6. The multifunctional cable testing tool based on FPGA according to claim 1, characterized in that: The first isolator (U4) and the second isolator (U7) are of model SN74AC.

7. The multifunctional cable testing tool based on FPGA according to claim 1, characterized in that: The main chip FPGA (U1) adopts the model of Xilinx Spartan-6.

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