A cable wiring calibration tool for engineering construction

Abstract

The invention relates to a cable wiring proofing tool for engineering construction. The cable wiring proofing tool is characterized by comprising transmitters / receivers; one transmitter / receiver is respectively connected with a common ground wire and a cable to be tested, and transmits a signal through the cable to be tested. Another transmitter / receiver is respectively connected to the common ground line and the cable to be tested, to receive the transmitted signal. The cable wiring proofing tool has the advantages that the design is reasonable and the structure is simple, the accurate judgment of the on-resistance of a circuit to be tested can be achieved by means of a reasonable algorithm program of a first single chip microcomputer and a circuit design, and the cable single-wire tri-state detection can be performed with wire dismantling or without wire dismantling. Detection and alarm functions under three conditions which are an open circuit state, a closed circuit state and a ground fault short-circuit state are achieved, and the cable detection efficiency is improved conveniently, fast and effectively.

Description

technical field [0001] The invention relates to the electromechanical field, in particular to a cable connection calibration tool for engineering construction. Background technique [0002] At present, for various engineering installation fields, the checking work of the cable connection in the control cabinet before the completion of the cabinet is also called the calibration process. There are currently two methods for operation. One is to use a multimeter to measure and test the ground one by one. The method is that two people at both ends remove the same measured wire from the terminal that has already been connected at the same time. After one side removes the wire, manually short-circuit to the ground, and use the walkie-talkie to notify the operator at the other end to use a multimeter to measure the resistance to the ground. Check, Repeat the on-off test several times to confirm that the core wire of this line is correct, and then connect it back to the terminal bloc...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that it is necessary to remove the wires one by one and repeatedly test the short circuit to the ground to confirm. It needs to communicate with the walkie-talkie continuously. The construction speed is relatively slow and the efficiency is low. In addition, the terminal is easily damaged due to repeated disconnection

[0003] Another method is to use a long line to test the light, the indicator light and the battery are placed in the hands of the commander in the middle, and an operator on each side holds the test line to follow the command of the commander's walkie-talkie, and respectively touch the corresponding terminals on the wiring cabinet. If the wiring is correct, the circuit Conduction, the indicator light is on, which means it is qualified. After recording, replace it with another one to continue the test. This method has been used for many years in some units. The disadvantage is that it needs to pull the wire. The operators at both ends do not know the current measurement status. Judging by the experience of the light on and off and the light and dark, the conduction of the tested cable cannot be quantitatively detected, and if it is greater than a certain ohm, it is unqualified and cannot be found in time; in addition, the temporary cable is very long, and it is difficult to move randomly, and the efficiency is low.

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