Satellite-synchronous buried and underwater metal pipeline detection signal transmitting device and application method thereof
A technology for detecting signals and transmitting devices, which is applied in the field of satellite synchronous detection pulse signal transmitting devices, can solve problems such as the inability of signal strength and transmission distance to meet detection requirements, achieve routing detection and depth measurement, increase strength and range, and improve detection. The effect of signal strength
Active Publication Date: 2019-07-05
天津市嘉信技术工程有限责任公司
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Problems solved by technology
[0007] The purpose of the present invention is to solve the problem that the signal strength and transmission distance cannot meet the detection requirements due to the attenuation of the detection signal of large buried depth, long-span buried and underwater metal pipelines, and to provide a satellite-synchronized buried and underwater metal pipeline detection Signal transmitting device and applying method
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[0037] 1. Hardware implementation:
[0038] The satellite-synchronous buried and underwater metal pipeline detection signal transmitting device includes a signal modulation unit, a control circuit, and a satellite second pulse receiving unit. Two solid-state relay branches are connected in parallel between the two current signal output terminals in the signal modulation unit, and two solid-state relays are connected in series on each solid-state relay branch, a total of 4 solid-state relays, and the middle of the two solid-state relay branches The node is led out as two signal output terminals, one is grounded, and the other is the pipeline to be tested. The control circuit of the four solid state relays performs on-off control according to the set timing according to the synchronization signal obtained by the satellite second pulse receiving unit connected to it, so as to realize Modulation and launch of buried and underwater pipeline detection signals. in,
[0039] 1) Powe...
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The invention relates to a satellite synchronized underground and underwater metal pipeline detection signal transmitting device and a detection signal application method. A great depth, long span underground and underwater crossing metal pipeline detection signal attenuate, consequently, the signal strength and transmission distance cannot meet detection requirements. The invention solves the above problem. The transmitting device comprises a signal transmitter, a control circuit and four solid state relays that are controlled by the control circuit, wherein every two solid state relays are in serial connection and then are connected in parallel, middles nodes of two solid state relays are led out to be used as two signal output ends, one is grounded and the other is connected with a to-be-tested pipeline. Output detection signals are strictly synchronous in time sequence by receiving a GPS second pulse signal, so that detection currents applied to the pipeline by two transmitting devices can be completely synchronized and superposed, the detection currents on the pipeline strengthen each other in transmission, therefore, the detection signal is stronger, the effective detection depth and distance of the pipeline are increased, and the great depth, long span crossing pipeline can be detected.
Description
technical field [0001] The satellite synchronous detection pulse signal transmitting device of the present invention relates to the route detection of underground metal pipelines with a large buried depth and the superimposition of buried depth measurement signals, and belongs to the application technical field of buried and underwater metal pipeline detection. Background technique [0002] Pipelines crossing construction through directional drilling, as well as underwater pipelines such as rivers and lakes, are in a special environment with long spans and large buried depths. Probe current signal of sufficient strength. If the buried and underwater pipelines cannot be accurately positioned, other corrosion detection such as corrosion and protection status cannot be effectively implemented. [0003] The general methods for applying land-based detection signals are: [0004] 1. Ground pole method: set up a signal transmitter at one end of the pipeline, connect the output li...
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IPC IPC(8): H04B1/04H04B7/185
CPCH04B1/04H04B7/185
Inventor 林守江兰玉明
Owner 天津市嘉信技术工程有限责任公司