CN-121995498-A - Multipole sound wave receiving unit and multipole sound wave receiving device

CN121995498ACN 121995498 ACN121995498 ACN 121995498ACN-121995498-A

Abstract

The invention discloses a multipolar sound wave receiving unit and a multipolar sound wave receiving device, which are applied to the technical field of petroleum logging, and comprise a framework, wherein the periphery of the framework comprises a first periphery and a second periphery which are distributed along the axial direction; the first peripheral part is provided with a plurality of receiving transducer assemblies uniformly distributed along the circumferential direction, the second peripheral part is provided with a plurality of receiving front-end circuit board assemblies distributed along the circumferential direction, and the receiving transducer assemblies are electrically connected with the receiving front-end circuit board assemblies adjacent along the axial direction through a first transmission line. The front-end circuit board assembly is arranged close to the position of the receiving transducer assembly and is electrically connected, so that the electric signals collected by the receiving transducer assembly can be transmitted to the front-end circuit board assembly only through a short distance to carry out signal filtering optimization and amplification enhancement, the signal quality and the anti-interference performance can be effectively improved, and the multipole sound wave receiving unit has a high signal-to-noise ratio.

Inventors

DU QUNJIE
QIN XIN
CHAO YONGSHENG
HUANG YUKE
LI MINGGANG
XU XIAOKAI
WEN JIANPING
REN YANMIN
BAI QIANG
FAN JISHENG

Assignees

中国石油化工集团有限公司
中石化石油工程技术服务股份有限公司
中石化经纬有限公司
中石化经纬有限公司地质测控技术研究院

Dates

Publication Date: 20260508
Application Date: 20241104

Claims (10)

1. A multipolar sound wave receiving unit comprising a skeleton, the outer peripheral portion of the skeleton comprising a first outer peripheral portion and a second outer peripheral portion distributed along an axial direction; The first peripheral part is provided with a plurality of receiving transducer assemblies uniformly distributed along the circumferential direction, and the second peripheral part is provided with a plurality of receiving front-end circuit board assemblies distributed along the circumferential direction; The receiving transducer assembly is electrically connected to the receiving front-end circuit board assembly adjacent in the axial direction by a first transmission line.
2. The multipole sound wave receiving unit according to claim 1, wherein the skeleton includes a skeleton main body and a sound insulation block fixedly connected, the skeleton main body and the sound insulation block being sequentially arranged in the axial direction; the frame body is provided with the first peripheral part, the receiving transducer assembly is arranged on the frame body, the sound insulation block is provided with the second peripheral part, and the receiving front-discharging circuit board assembly is arranged on the sound insulation block.
3. The multipole subsonic wave receiving unit of claim 2, wherein the first peripheral portion is uniformly provided with a plurality of receiving transducer grooves in a circumferential direction, the receiving transducer assemblies being fixed within the corresponding receiving transducer grooves; The receiving transducer groove is provided with a first notch towards the baffle wall of the sound insulation block so as to form a receiving wire slot based on the first notch, and the first transmission line is connected with the receiving transducer assembly and the receiving front-discharge circuit board assembly through the receiving wire slot.
4. A multipole sound wave receiving unit according to claim 3, wherein a connecting portion of the skeleton main body and the sound insulation block is formed with a spacing groove extending in the circumferential direction, the spacing groove being communicated with the receiving groove.
5. A multipole sound wave receiving unit according to claim 3, wherein a wiring groove is formed between adjacent receiving transducer grooves.
6. The multipole sound wave receiving unit of claim 3, further comprising a tie; the receiving transducer groove is provided with a second notch towards the blocking wall of the adjacent receiving transducer groove, so that a ribbon groove extending along the circumferential direction is formed based on the second notch, and the ribbon is arranged in the ribbon groove.
7. The multipole subsonic wave receiving unit of claim 2, wherein the receiving transducer assembly is secured to the first peripheral portion by a packing at least partially between the receiving transducer assembly and the first peripheral portion; and/or, the receiving front-end circuit board assembly is fixed to the second peripheral portion by a pressing block.
8. The multipole sound wave receiving unit according to any one of claims 1 to 7, wherein the receiving transducer assembly includes two piezoelectric ceramic sheets disposed in a stacked manner, the piezoelectric ceramic sheets being polarized in a thickness direction; the positive electrode side surface of one piezoelectric ceramic plate is contacted with the negative electrode side surface of the other piezoelectric ceramic plate and is electrically connected with the negative electrode side surface of the other piezoelectric ceramic plate, so that the two piezoelectric ceramic plates are connected in series.
9. A multipole sound wave receiving apparatus comprising a plurality of multipole sound wave receiving units according to any one of claims 1 to 8.
10. The multipole sound wave receiving apparatus according to claim 9, wherein the skeleton includes a through-hole penetrating the skeleton in the axial direction, the through-hole having a fixing cord provided therein; the multipolar sound wave receiving units are distributed along the axial direction, and the multipolar sound wave receiving units are connected through the fixing cable.

Description

Multipole sound wave receiving unit and multipole sound wave receiving device Technical Field The invention relates to the technical field of petroleum logging, in particular to a multipole sound wave receiving unit and a multipole sound wave receiving device. Background The multipole sub-acoustic wave receiver at present adopts a single sheet piezoelectric receiving transducer, a receiving unit is formed by arranging receiving transducers with sheet piezoelectric ceramics in a plurality of directions, and the receiving transducers in each direction are connected by two sheet receiving piezoelectric ceramics in parallel to receive acoustic wave signals, so that a multipole receiver unit is formed and is responsible for converting the acoustic wave signals into weak electric signals. Then, the weak electric signals are sent to an isolation circuit which is positioned at a far distance and is subordinate to an instrument circuit unit for amplification filtering and the like through a cable, and the receiving mode is easy to generate strong electromagnetic interference in the process of transmitting external sound sources due to weaker signals in the process of signal transmission, and when the receiving unit receives acoustic signals of softer and loose stratum such as a cavernous body and the like, the receiving unit can have the problems of low signal-to-noise ratio of the acoustic signals and large baseline interference, so that multipolar sonic logging cannot be normally completed. How to provide a multipole sound wave receiving unit with a high signal-to-noise ratio is a problem to be solved by the person skilled in the art. Disclosure of Invention The invention aims to provide a multipole sound wave receiving unit with higher signal-to-noise ratio, and another aim of the invention is to provide a multipole sound wave receiving device with higher signal-to-noise ratio. In order to solve the technical problem, the invention provides a multipolar sound wave receiving unit, which comprises a framework, wherein the periphery of the framework comprises a first periphery and a second periphery which are distributed along the axial direction; The first peripheral part is provided with a plurality of receiving transducer assemblies uniformly distributed along the circumferential direction, and the second peripheral part is provided with a plurality of receiving front-end circuit board assemblies distributed along the circumferential direction; The receiving transducer assembly is electrically connected to the receiving front-end circuit board assembly adjacent in the axial direction by a first transmission line. Optionally, the framework comprises a framework main body and a sound insulation block which are fixedly connected, and the framework main body and the sound insulation block are sequentially arranged along the axis direction; the frame body is provided with the first peripheral part, the receiving transducer assembly is arranged on the frame body, the sound insulation block is provided with the second peripheral part, and the receiving front-discharging circuit board assembly is arranged on the sound insulation block. Optionally, the first peripheral portion is uniformly provided with a plurality of receiving transducer grooves along a circumferential direction, and the receiving transducer assemblies are fixed in the corresponding receiving transducer grooves; The receiving transducer groove is provided with a first notch towards the baffle wall of the sound insulation block so as to form a receiving wire slot based on the first notch, and the first transmission line is connected with the receiving transducer assembly and the receiving front-discharge circuit board assembly through the receiving wire slot. Optionally, a spacer groove extending along the circumferential direction is formed at a connection portion of the skeleton main body and the sound insulation block, and the spacer groove is communicated with the receiving groove. Optionally, a wiring groove is formed between adjacent receiving transducer grooves. Optionally, further comprising a tie; the receiving transducer groove is provided with a second notch towards the blocking wall of the adjacent receiving transducer groove, so that a ribbon groove extending along the circumferential direction is formed based on the second notch, and the ribbon is arranged in the ribbon groove. Optionally, the receiving transducer assembly is fixed to the first peripheral portion by a packing, the packing being at least partially located between the receiving transducer assembly and the first peripheral portion; and/or, the receiving front-end circuit board assembly is fixed to the second peripheral portion by a pressing block. Optionally, the receiving transducer assembly includes two piezoelectric ceramic plates stacked, and the piezoelectric ceramic plates are polarized along a thickness direction; the positive electrode side surface of one piezoelectric