1、
地埋示踪线的要领为直连法,它信噪比高、滋扰少、易探测,探测效果较量准确可靠 。
1. The method of buried tracer line is direct connection method, which has high signal-to-noise ratio, less interference, easy detection, and accurate and reliable detection results.
2、市区内的PE管道示踪线不宜选用感应法探测 。都会区域内的管线麋集,而示踪线相对细小,其接地回路电阻一样平常情形下比其它管线大许多,因此爆发的感应电流信号往往要比非目的管线弱许多,示踪线信号容易被掩饰而造成误测 。
2. The PE pipeline tracer line in the urban area should not be detected by the induction method. The pipelines in the urban area are dense, while the tracer line is relatively small, and its grounding circuit resistance is generally much larger than that of other pipelines, so the induced current signal generated is often much weaker than that of non-target pipelines, and the tracer line signal is easy to be covered up, resulting in mismeasurement.
3、在探测短分支管道示踪线时,施加信号点宜选择分支示踪线的最后(即测试桩处),这样分支示踪线上的信号强,不会漏测分支点 。
3. When detecting the trace line of the short branch pipeline, the signal point should be selected at the end of the branch trace line (i.e. at the test pile), so that the signal on the branch trace line is strong and the branch point will not be missed.
4、用直连法地埋示踪线时,只管选择较低的事情频率,发射机的接地线也只管不要跨接其它管线,以镌汰信号感应或串扰到其它管线 。
4. When using the direct connection method to bury the tracer line, try to choose a lower working frequency, and try not to cross connect the transmitter's ground wire to other pipelines to reduce signal induction or crosstalk to other pipelines.
5、探测时应凭证现真相形,改变供电点位置后再重复探测,检查两次探测效果的吻合情形,以提高探测的准确性和精度 。
5. During detection, the position of power supply point shall be changed according to the actual situation, and then the detection shall be repeated to check the coincidence of the two detection results, so as to improve the accuracy and accuracy of detection.
6、关于定向钻方法铺设的PE管道,由于示踪线的埋深较大(可能大于5m),除选择较低的事情频率以镌汰电磁场感应到其它管线上,还应只管想法改善接地条件,增添示踪线上的供电电流,提高信噪比,这样可获得较好的探测效果 。
6. For PE pipes laid by directional drilling, due to the large buried depth of the tracer line (which may be greater than 5m), in addition to selecting a lower working frequency to reduce the induction of electromagnetic field to other pipelines, we should also try to improve the grounding conditions, increase the power supply current on the tracer line, and improve the signal-to-noise ratio, so as to obtain better detection results.
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