NOYAFA Electronic specializing in testing instruments and cable testers for 16 years
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NOYAFA Electronic specializing in testing instruments and cable testers for 16 years
Author: Noyafa–POE checker
Portable shielded cable flaw detector consists of four parts, powered by DC12V nickel-metal hydride battery, it has the characteristics of small size, light weight, simple operation, low manufacturing cost, automatic charging, digital display, not restricted by the place of use, fast detection speed, etc. . There is a portable shielded cable flaw detector on the side. It is composed of four parts and powered by DC12V nickel-metal hydride battery. It has the advantages of small size, light weight, simple operation, low manufacturing cost, automatic charging, digital display, not limited by the place of use, and detection speed. Fast and so on. There are handles on the side for easy carrying.
The product can detect the damage of the shielded cable when the gas concentration in the coal mine is less than 1%, avoiding the problem of replacing the cable because the leakage point cannot be found, greatly shortening the maintenance time and reducing the time affecting normal production. Shielded rubber sheathed cable is a commonly used power supply cable in coal mines, and is widely used in the power supply of high-power equipment in fully mechanized mining and fully mechanized excavation working faces in coal mines. During the use of shielded rubber-sheathed cables, due to improper use, the shielded cables are often damaged internally; because there is a shielding layer inside the shielded cables, once internal damage occurs, it will cause cable leakage faults.
Since the length of each shielded cable is several hundred meters or more, and the damaged part is hidden, the traditional search method is to wipe the cable clean, and perform a planing inspection on the damaged part of the outer sheath to check whether the inner sheath is damaged or not. , not only time-consuming and laborious, but also causing secondary damage to the cable, and it is difficult to find the fault point of the shielded rubber sheathed cable; hours, seriously affecting normal production. Because the cable flaw detector can be used underground, it greatly saves the time to find out the faulty cable, and avoids the problem of replacing the cable due to the failure of the cable to be found, which improves the equipment startup rate and running time, and has significant economic benefits. The damage of shielded rubber sheathed cables during the use of underground mines is a high-probability event, and it is also a difficult problem for underground maintenance personnel to deal with. The portable shielded cable flaw detector solves this problem very well, and has good promotion and application value .
Flaw detector detection The main introduction here is the most widely used method to obtain the internal characteristic information of the object through the reflection method. The reflection method is based on the principle that ultrasound will have a strong reflection when it passes through the interface of different acoustic impedance tissues. As we know, when the sound wave propagates from one medium to another medium, it is at the interface between the two. Reflection occurs, and the greater the difference between the media, the greater the reflection. We can emit ultrasonic waves with strong penetrating power and can propagate in a straight line to an object. The flaw detector then receives the reflected ultrasonic waves and judges the tissue contained in the tissue according to the sequence and amplitude of these reflected ultrasonic waves. The size and distribution of various media, and the degree of contrast between various media, etc., the flaw detector can determine whether the object under test is abnormal.
In this process, many aspects are involved, including the generation, reception, signal conversion and processing of ultrasonic waves. Some of the above related introductions about cable flaw detectors, I hope to be helpful to all friends who are engaged in electricity related.
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