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Cable test controller based on can bus communication

A CAN bus, test controller technology, applied in line transmission monitoring/testing, electrical components, line transmission components and other directions, can solve problems affecting the accuracy of test results and other issues

Active Publication Date: 2016-04-06
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to solve the problem that the existing cable test equipment needs long-distance transfer cables, which affects the accuracy of test results, and provides a cable test controller based on CAN bus communication

Method used

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  • Cable test controller based on can bus communication
  • Cable test controller based on can bus communication
  • Cable test controller based on can bus communication

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Experimental program
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specific Embodiment approach 1

[0068] Specific implementation mode one: the following combination figure 1 and figure 2 Describe this embodiment, the cable test controller based on CAN bus communication described in this embodiment, the test controller realizes the communication with the management host through the CAN bus, and the test controller is connected to the cable network through an adapter cable; The test controller includes CAN interface circuit 1, main controller 2, FPGA3, external storage circuit 4, LED drive and display circuit 5, excitation source relay switching circuit 6, cable channel switching relay array 7, resistance voltage divider circuit 8 and sampling voltage conditioning circuit 9,

[0069] The CAN interface circuit 1 is an interface circuit between the CAN bus and the main controller 2, and is used to realize the level conversion between the node logic level and the CAN bus differential level;

[0070] The main controller 2 realizes data interaction with the management host, an...

specific Embodiment approach 2

[0086] Embodiment 2: This embodiment further describes Embodiment 1. The main controller 2 in this embodiment is realized by using a DSP2812 chip.

specific Embodiment approach 3

[0087] Specific implementation mode three: the following combination image 3 Describe this embodiment, this embodiment will further explain Embodiment 2, the reset logic of the FPGA3 described in this embodiment adopts two reset modes of power-on reset and button reset, and the power-on reset mode is divided into RC circuit reset and logic reset;

[0088] Described RC circuit reset adopts counter module to realize, after main controller 2 is powered on, counter module receives clock signal clk-dsp and starts counting, and the output end / rs of counter module outputs low level now; When the counting time of counter module After reaching the time required for the reset of the main controller 2, the counter module stops counting, and / rs outputs a high level; the level signal / RS1 output by the output terminal / rs of the counter module is used as a reset signal of AND logic;

[0089] The logic reset signal / RS2 is used as the second reset signal of AND logic;

[0090] The reset ...

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Abstract

The invention provides a cable testing controller based on CAN bus communication, and belongs to the technical field of cable testing. The cable testing controller aims to solve the problem that due to the fact that an existing cable testing device needs long-distance switch cables, accuracy of a testing result is influenced. The testing controller achieves communication with a management host through a CAN bus and is connected with a cable network through the switch cables. The testing controller comprises a CAN port circuit, a main controller, an FPGA, an external storage circuit, an LED drive and display circuit, an excitation source relay switching circuit, a cable channel switching relay array, a resistive subdivision circuit and a sampling voltage regulation circuit. The cable testing controller is used for testing of the cable network.

Description

technical field [0001] The invention relates to a cable test controller based on CAN bus communication, belonging to the technical field of cable test. Background technique [0002] When using wires and cables, problems such as misconnection and poor contact between cables and connectors often occur. After long-term use, problems such as short circuits, open circuits, and poor insulation performance between wires or cables to the ground often occur. These problems sometimes It will bring immeasurable losses to people. With the increasingly wide application of wire and cable in industry, communication and other fields, the importance of wire and cable performance testing and maintenance continues to increase. [0003] At present, the cable detection in many industries in our country is still in the manual stage, which is not only time-consuming and labor-intensive, but also prone to human errors. Although there are many types and quantities of related cable testing equipmen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B3/46H04L12/26
Inventor 孙超刘玉奇姜守达丁雪静
Owner HARBIN INST OF TECH
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