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Cable detector

A technology of measuring devices and terminal blocks, applied in the field of line detectors, can solve the problems of incomplete reproducibility and inaccurate measurement results

Inactive Publication Date: 2013-08-21
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] But the measurements achievable with such line probing devices are often imprecise and not always reproducible

Method used

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Embodiment Construction

[0022] figure 1 A block diagram of the measuring device 100 is shown. Measuring device 100 is part of a line detection device 105 for testing conductors carrying an alternating voltage, eg 110V / 60Hz or 230V / 50Hz lines or low voltage lines, eg 12V / 50-60Hz.

[0023] The clock generator 110 has two outputs at which periodically alternating signals phase-shifted, preferably phase-shifted by 180°, are provided. The alternating signal can comprise, in particular, a rectangular, triangular or sinusoidal signal. The output of the clock generator 110 is connected to the first controllable amplifier 115 or the second controllable amplifier 120 . Each of the controllable amplifiers 115 , 120 has a control input which is used by the amplifier to obtain a signal which controls the amplification factor of the controllable amplifier 115 , 120 . The output of the first controllable amplifier 115 is connected to the first complex resistor 120 , and the output of the second controllable ampl...

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PUM

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Abstract

The invention relates to a measuring device (100) for detecting a conductor (180) that carries alternating voltage. The measuring device comprises a voltage source (110) for producing two phase-shifted alternating voltages, two complex impedance elements (125, 130) having first connections, which are connected to the alternating voltages, and second connections, which are connected to each other and to which a differential voltage is applied, and a control device for controlling the alternating voltages in such a way that a component of the differential voltage synchronous with the alternating voltages is minimized in magnitude. The control device is designed to detect the conductor if the ratio of the alternating voltages does not correspond to a ratio of the complex impedance elements in the absence of the conductor. The second complex impedance element can be changed by means of a control voltage, and a probe for providing the control voltage as a function of an alternating electromagnetic field induced by the conductor is provided.

Description

technical field [0001] The invention relates to a measuring device according to the preamble of claim 1 and a measuring method according to claim 10 for detecting a conductor carrying an alternating voltage. Background technique [0002] Line detection devices are known, with which, for example, power supply lines hidden in walls can be detected. This may be necessary, for example, when boreholes are to be introduced into the wall without damaging the power supply line. With this line detection device, the alternating electromagnetic field present in the region of the power supply line is usually determined by means of electrodes. [0003] However, the measurement results achievable with such line detection devices are often imprecise and not always reproducible. The object underlying the present invention is to specify an improved measuring device and an improved measuring method for detecting conductors carrying an alternating voltage. [0004] The invention solves this...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/06
CPCG01V3/06G01R33/0005G01V3/081G01V3/08G01R29/08
Inventor M.哈尔A.阿尔布雷希特
Owner ROBERT BOSCH GMBH