Novel signal receiving device of line finder

Abstract

The invention provides a novel signal receiving device of a line finder. The device comprises a signal receiving module (10), an amplification module (20), an analog-digital conversion module (30), a central control module (40), an audio signal generating module (50) and an indicator (70). The signal receiving module (10) receives dominant frequency signals in a detected cable loop and sends the received dominant frequency signals to the amplification module (20) to be amplified, and then the dominant frequency signals are converted into digital signals through the analog-digital conversion module (30). The central control module (40) receives the digital signals, conducts analysis, process and confirmation on the digital signals and then sends control instructions to the audio signal generating module (50). The audio signal generating module (50) generates audio signals and is indicated through the indicator (70).

Description

technical field [0001] The invention relates to a signal receiving device of a novel line finder. Background technique [0002] With the rapid development of the network and communication industry, the number of networks and communications has increased geometrically, and the difficulty of wiring has been further increased. The cable hunter has become an essential tool for finding cables in the construction and routine maintenance of various metal lines such as network cables and communication cables. It can quickly and efficiently find the required cable from a large number of harness cables. [0003] At present, there are two types of known line finder, one is the contact type: directly touch the metal part of the wire core with a metal probe, and then combine it with a multimeter to judge. This method requires stripping the insulating sheath of the metal wire, and is rarely used due to inconvenience. One is the non-contact type: it is composed of an audio generator and...

AI Technical Summary

Problems solved by technology

[0004] However, the receiving part of the receiver of the existing non-contact cable finder adopts metal probe induction to receive. When there are interference sources such as AC220, 50HZ near the tested cable, the receiver has poor anti-interference ability and is extremely vulnerable to Interference, the received signal has multiple frequencies, it is very messy, the signal strength is not enough, the sound effect is not good, the sensitivity is not high and there is noise, so the cable finder cannot accurately find the tested cable and the tested cable. The fault point of the cable, thus increasing the difficulty of the detection work

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