CN103513273A - Land-use four-component digital geophone - Google Patents
Land-use four-component digital geophone Download PDFInfo
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- CN103513273A CN103513273A CN201210215447.1A CN201210215447A CN103513273A CN 103513273 A CN103513273 A CN 103513273A CN 201210215447 A CN201210215447 A CN 201210215447A CN 103513273 A CN103513273 A CN 103513273A
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Abstract
The invention relates to a land-use four-component digital geophone. In the prior art, a seismic wave propagation characteristic can not be finely researched. By using the geophone of the invention, the above problem is solved. The geophone is a four-component geophone formed by a three-component MEMS acceleration geophone and a moving-coil velocity geophone. The geophone is formed by a micro electromechanical system earthquake three component acceleration sensor, a weak signal detection and feedback circuit, a moving-coil geophone, a digital unit, a control module CM, a data communications unit and a power module PM. The micro electromechanical system earthquake three component acceleration sensor and the weak signal detection and feedback circuit are used to complete acquisition and digital functions of an acceleration parameter. The moving-coil geophone and the digital unit are used to complete the acquisition and digital functions of a velocity parameter. The geophone possesses the advantages that a signal acquisition and receiving function of the one velocity parameter and the three-component acceleration parameter can be performed on a same receiving point; the seismic wave propagation characteristic can be finely researched; exploration precision is greatly increased.
Description
Technical field
The present invention relates to seismoreceiver, particularly relate to four component digital geophones for a kind of land.
Technical background
Method of seismic exploration remains the Main Means at land and seafari oil and natural gas at present, also be the important method of exploration of other mineral resources simultaneously, and be widely used in studying earth ' s internal structure, engineering exploration and detection, geological hazards prediction etc. aspect.In seismic prospecting, be used for directly picking up seismic oscillation, and vibration be converted to the instrument of the form of energy that meets instrument record system needs, be called seismoreceiver.Seismoreceiver can be divided into land geophone, marsh geophone, marine detector and well seismometer etc. by environment for use; By principle of work, can be divided into induction (moving-coil type) wave detector, piezoelectric seismometer, optical fiber detector and MEMS wave detector etc.; By the physical quantity of output signal, can be divided into velocity-type detector, acceleration detector etc.; By the type of output signal, can be divided into analog detector and digital geophone.The index of seismoreceiver has determined the key technical indexes of seismic prospecting instrument.
What use was both at home and abroad maximum at present is moving-coil seismic detector, and this wave detector has had the developing history of 50 years, and weight develops into tens grams of current levels from initial several kilogram levels, has obtained being widely used in seismic prospecting.But due to its intrinsic mechanical features, this geophone sensitivity is low, dynamic range is little (about 60dB), frequency band narrow (10～200Hz), poor anti jamming capability, quality and volume all larger, and current seismic instrument has reached the dynamic range of 120dB, so can not give full play to the effect of seismic instrument.But owing to there is no suitable substitute products, be still to use at present the widest seismoreceiver.
Compare with conventional simulation moving-coil geophone, the advantage such as that digital MEMS wave detector has is lightweight, bandwidth, dynamic range are large, it is little to distort, antijamming capability is strong, likely substitutes and uses at present the widest simulation moving-coil geophone.MEMS digital geophone is specially adapted to single wave detector high-density acquisition technique.
Moving-coil seismic detector is typical velocity-type detector and MEMS wave detector is typical acceleration detector.But at present conventional MEMS wave detector and moving-coil geophone be the task of the not competent PROPAGATION CHARACTERISTICS OF SEISMIC of scrutiny more all.
Summary of the invention
The object of the invention is to overcome the above-mentioned defect of prior art, and a kind of four component digital geophones for land of the PROPAGATION CHARACTERISTICS OF SEISMIC of scrutiny are more provided.
For achieving the above object, four component digital geophone 1V3A (1 Velocity Geophone for land of the present invention, 3D Acceleration Sensor) the four component wave detectors that formed by 3 component MEMS acceleration detectors and vertical component moving-coil speed wave detector: this wave detector is comprised of seven big units: MEMS (micro electro mechanical system) earthquake 3 component acceleration transducer MEMS Sensor (Micro ElectroMechanical Systems Sensor), Testing of Feeble Signals and feedback circuit ASIC (Application Specific Integrated Circuits), moving-coil geophone CG (Coiling Geophone), digital unit ADU (Analog to Digital Unit), control module CM (Control Module), data communication units CI (Communication Interface) and supply module PM (Power Module), wherein: MEMS (micro electro mechanical system) earthquake 3 component acceleration transducer MEMS Sensor and Testing of Feeble Signals and feedback circuit ASIC have been used for collection and the digitizing function of acceleration parameter, moving-coil geophone CG and digital unit ADU have been used for collection and the digitizing function of speed parameter, data communication units CI provides the data communication function with seismic instrument host computer system, control module CM controls Testing of Feeble Signals and feedback circuit ASIC, digital unit ADU, data communication units CI and supply module PM, supply module PM provides power supply support for (to other unit).
Wave detector of the present invention has signals collecting and the receiving function that same acceptance point is carried out to 1 speed parameter and 3 component acceleration parameter, can be so that follow-up data be processed and analyze between 1 speed parameter and these 4 of 3 component acceleration parameter are described the different physical quantities of same acceptance point displacements and carry out, and be analyzed.Land of the present invention with four component digital geophones for Study of Seismic wave propagation characteristic more subtly, significant to improving surveying accuracy.Can be used for the aspects such as oil, rock gas, coalfield and ore prospecting, Geological Engineering prospecting, Geological Hazards Monitoring, be a kind of can meticulous detection artificial or earthquake signal convert thereof into the device of digital signal.
As optimization, described MEMS (micro electro mechanical system) earthquake 3 component acceleration transducer MEMS Sensor are comprised of 3 groups of MEMS sensor mems x, MEMSy and the MEMSz of quadrature respectively; Described moving-coil geophone CG is vertical component wave detector (sensor) CGz.
As optimization, described vertical component wave detector CGz and acceleration transducer vertical component MEMSz have signals collecting and the reception to same acceptance point vertical component speed and two parameters of acceleration, utilize speed pickup (moving-coil geophone CGz) and acceleration transducer (acceleration transducer vertical component MEMSz) this feature different to the response characteristic of seismic signal on same acceptance point and noise, set up the relation between speed pickup and acceleration transducer, be used for improving resolution and signal to noise ratio (S/N ratio), detect feeble signal.Be that vertical component wave detector CGz and acceleration transducer vertical component MEMSz have signals collecting and the reception to same acceptance point vertical component speed and two parameters of acceleration, but because speed pickup (moving-coil geophone CGz) is different to the response characteristic of seismic signal on same acceptance point and noise with acceleration transducer (acceleration transducer vertical component MEMSz), utilize this feature, can set up the relation between speed pickup and acceleration transducer, this is conducive to improve resolution and signal to noise ratio (S/N ratio), detects feeble signal.
As optimization, have same acceptance point is carried out to 1 speed parameter and 3 signals collecting of component acceleration parameter and the function of reception, can be so that follow-up data be processed and analyze between 1 speed parameter and these 4 of 3 component acceleration parameter are described the different physical quantities of same acceptance point displacements and carry out, and be analyzed.
As optimization, described MEMS (micro electro mechanical system) earthquake 3 component acceleration transducer MEMS Sensor and Testing of Feeble Signals and feedback circuit ASIC, moving-coil geophone CG is directly connected respectively and becomes one with digital unit ADU, for avoiding the transmission of simulating signal on cable, retain the effective constituent of weak signal, and improved antijamming capability.Be MEMS (micro electro mechanical system) earthquake 3 component acceleration transducer MEMS Sensor and Testing of Feeble Signals and feedback circuit ASIC, moving-coil geophone CG is directly connected respectively and becomes one with digital unit ADU.The transmission of simulating signal on cable avoided in this connection, retained the effective constituent of weak signal, and improved antijamming capability.
As optimization, described control module CM is embedded type CPU.Be that control module CM is embedded type CPU, control Testing of Feeble Signals and feedback circuit ASIC, digital unit ADU, data communication units CI and supply module PM.
As optimization, acceleration transducer and moving-coil geophone are combined into one, become one and can gather 1 speed component of same acceptance point and the acquisition station of 3 components of acceleration simultaneously.
As optimization, described Testing of Feeble Signals and feedback circuit ASIC are Testing of Feeble Signals and the feedback circuit ASIC that low noise capacitance signal amplifies and great dynamic range amplifies, and reach high (more than 110dB) dynamic range with MEMS (micro electro mechanical system) earthquake 3 component acceleration transducer MEMS Sensor after coordinating; Digital unit ADU adopts A/D conversion kit CS3301A, the CS5373A of Cirrus Logic company and the AD1282 chip of CS5378 HuoTI company.
As optimization, one-piece construction is comprised of upper cover R1, outgoing cable R2, circuit board R3, quadrature 3 component seismic sensor MEMS Sensor, moving-coil geophone CG, shell R4 and tail cone R5 etc.; Shell R4 is 2 layers of structure, and moving-coil geophone CG places in bottom in lower floor, places 3 component sensor MEMS Sensor on moving-coil geophone CG, and shell R4 places circuit board R3 in inner upper strata; Testing of Feeble Signals and feedback circuit ASIC, digital unit ADU, control module CM, data communication units CI and supply module PM are integrated on circuit board R3; Moving-coil geophone CG, 3 component sensor MEMS Sensor and circuit board R3 are encapsulated in shell R4 by upper cover R1, moving-coil geophone CG draws signal wire and is connected to circuit board R3 above, and 3 component sensor MEMS Sensor also draw signal wire and are connected on circuit board R3.
As optimization, by circuit board R3, draw two pairs of cables, wherein a pair of land that is responsible for powers with 4 component digital geophone 1V3A, and another is to as data line, and tail cone is arranged on the lower end of shell and as grounded parts.
Adopt after technique scheme, land of the present invention has signals collecting and the receiving function that same acceptance point is carried out to 1 speed parameter and 3 component acceleration parameter with four component digital geophones, can carry out so that follow-up data is processed and analyzed between the different physical quantities of 1 speed parameter and these 4 the same acceptance point displacements of description of 3 component acceleration parameter, and be analyzed, scrutiny PROPAGATION CHARACTERISTICS OF SEISMIC more, significantly improves the advantage of surveying accuracy.Be a kind of can meticulous detection artificial or earthquake signal convert thereof into the device of digital signal, can be used for the aspects such as oil, rock gas, coalfield and ore prospecting, Geological Engineering prospecting, Geological Hazards Monitoring.
Accompanying drawing explanation
Fig. 1 is the theory diagram of four component digital geophones for land of the present invention;
Fig. 2 is the one-piece construction schematic diagram of four component digital geophones for land of the present invention.
Embodiment
As shown in the figure, apparatus of the present invention land has with four component digital geophone 1V3A signals collecting and the receiving function that same acceptance point is carried out to a speed component and 3 components of acceleration, can be so that follow-up data be processed and analyze between 1 speed parameter and these 4 of 3 component acceleration parameter are described the different physical quantities of same acceptance point displacements and carry out, and be analyzed.Simultaneously because speed pickup (moving-coil geophone CG) is different to the response characteristic of same acceptance point seismic signal and noise with acceleration transducer (MEMS (micro electro mechanical system) seismic sensor MEMS Sensor), in other words, earthquake useful signal and various noise have different performance characteristics in speed and these two kinds of physical quantitys of acceleration, utilize this feature, more be conducive to improve resolution and signal to noise ratio (S/N ratio), detect feeble signal.
Referring to Fig. 1, four component digital geophone 1V3A for apparatus of the present invention land, it is characterized in that being formed by seven big units: MEMS (micro electro mechanical system) seismic sensor MEMS Sensor (Micro ElectroMechanical Systems Sensor), Testing of Feeble Signals and feedback circuit ASIC (Application Specific Integrated Circuits), moving-coil geophone CG (Coiling Geophone), digital unit ADU (Analog to Digital Unit), control circuit CM (Control Module), data communication units CI (Communication Interface) and feed circuit PM (Power Module).
MEMS (micro electro mechanical system) seismic sensor MEMS Sensor adopts the MEMS seismic sensor of Shanghai Inst. of Microsystem and Information Technology, Chinese Academy of Sci's development, Testing of Feeble Signals and feedback circuit ASIC customize according to design, after two devices coordinate, can reach dynamic range more than 110dB, reach international most advanced level.Digital unit ADU can adopt A/D conversion kit CS3301A, the CS5373A of Cirrus Logic company and the AD1282 chip of CS5378 HuoTI company.
Land of the present invention is typical acceleration transducer with the MEMS (micro electro mechanical system) seismic sensor MEMS Sensor in four component digital geophone 1V3A, and it and Testing of Feeble Signals and feedback circuit ASIC have completed reception and the digitizing function of acceleration parameter.
Land of the present invention is typical acceleration transducer with the moving-coil geophone CG in four component digital geophone 1V3A, and it and digital unit ADU have completed reception and the digitizing function of speed parameter.
Apparatus of the present invention are combined into one MEMS acceleration transducer and moving-coil speed wave detector, become an acquisition station (digital geophone), thereby can gather 1 speed component and 3 components of acceleration of same acceptance point simultaneously.
Land of the present invention adopts low noise capacitance signal amplifying technique and great dynamic range amplifying technique with the Testing of Feeble Signals in four component digital geophone 1V3A and feedback circuit ASIC, be conducive to detect weak signal composition, improve the dynamic range of sensor, made dynamic range reach the demand of seismic prospecting.
MEMS (micro electro mechanical system) seismic sensor MEMS Sensor in four component digital geophone 1V3A and Testing of Feeble Signals and feedback circuit ASIC for land of the present invention, directly connect and become one; Moving-coil geophone CG is directly connected and becomes one with digital unit ADU.The transmission of simulating signal on cable avoided in this connection, retained the effective constituent of weak signal, and improved antijamming capability.
Land of the present invention is embedded type CPU with the control circuit CM in four component digital geophone 1V3A, controls Testing of Feeble Signals and feedback circuit ASIC, digital unit ADU, data communication units CI and feed circuit PM.
Land of the present invention provides the data communication function with seismic instrument host computer system with the data communication units CI in four component digital geophone 1V3A.
Four component digital geophone 1V3A for land of the present invention, one-piece construction (referring to Fig. 2) is comprised of upper cover R1, outgoing cable R2, circuit board R3, MEMS (micro electro mechanical system) 3 component seismic sensor MEMS Sensor, moving-coil geophone CG, shell R4 and tail cone R5 etc.Shell R4 is 2 layers of structure, and moving-coil geophone CG places in bottom in lower floor, places 3 component sensor MEMS Sensor on moving-coil geophone CG, and shell R4 places circuit board R3 in inner upper strata.Testing of Feeble Signals and feedback circuit ASIC, digital unit ADU, control module CM, data communication units CI and supply module PM are integrated on circuit board R3.Moving-coil geophone CG, 3 component sensor MEMS Sensor and circuit board R3 are encapsulated in shell R4 by upper cover R1, moving-coil geophone CG draws signal wire and is connected to circuit board R3 above, and 3 component sensor MEMS Sensor also draw signal wire and are connected on circuit board R3.By circuit board R3, draw two pairs of cables, wherein a pair of land that is responsible for powers with 4 component digital geophone 1V3A, and another is to as data line, and tail cone is arranged on the lower end of shell and as grounded parts.For simplicity, the circuit board R3 in Fig. 2 also can employing level install.
Claims (10)
- Four component digital geophones for 1.Yi Zhong land, it is characterized in that the four component wave detectors that formed by 3 component MEMS acceleration detectors and moving-coil speed wave detector: this wave detector is comprised of seven big units: MEMS (micro electro mechanical system) earthquake 3 component acceleration transducer MEMS Sensor, Testing of Feeble Signals and feedback circuit ASIC, moving-coil geophone CG, digital unit ADU, control module CM, data communication units CI and supply module PM, wherein: MEMS (micro electro mechanical system) earthquake 3 component acceleration transducer MEMS Sensor and Testing of Feeble Signals and feedback circuit ASIC have been used for collection and the digitizing function of acceleration parameter, moving-coil geophone CG and digital unit ADU have been used for collection and the digitizing function of speed parameter, data communication units CI provides the data communication function with seismic instrument host computer system, control module CM controls Testing of Feeble Signals and feedback circuit ASIC, digital unit ADU, data communication units CI and supply module PM.
- 2. wave detector according to claim 1, is characterized in that described MEMS (micro electro mechanical system) earthquake 3 component acceleration transducer MEMS Sensor are comprised of 3 groups of MEMS sensor mems x, MEMSy and the MEMSz of quadrature respectively; Described moving-coil geophone CG is vertical component CGz wave detector.
- 3. wave detector according to claim 2, it is characterized in that described vertical component wave detector CGz and acceleration transducer vertical component MEMSz signals collecting and the reception to same acceptance point vertical component speed and two parameters of acceleration, utilize the speed pickup this feature different to the response characteristic of seismic signal on same acceptance point and noise with acceleration transducer, set up the relation between speed pickup and acceleration transducer, be used for improving resolution and signal to noise ratio (S/N ratio), detect feeble signal.
- 4. wave detector according to claim 1, it is characterized in that same acceptance point to carry out signals collecting and the reception of 1 speed parameter and 3 component acceleration parameter, make follow-up data process and analyze between the different physical quantities of 1 speed parameter and these 4 the same acceptance point displacements of description of 3 component acceleration parameter and carry out, and be analyzed.
- 5. wave detector according to claim 1, it is characterized in that described MEMS (micro electro mechanical system) earthquake 3 component acceleration transducer MEMS Sensor and Testing of Feeble Signals and feedback circuit ASIC, moving-coil geophone CG is directly connected respectively and becomes one with digital unit ADU, avoid the transmission of simulating signal on cable, the effective constituent that retains weak signal, improves antijamming capability.
- 6. wave detector according to claim 1, is characterized in that described control module CM is embedded type CPU.
- 7. wave detector according to claim 1, is characterized in that acceleration transducer and moving-coil geophone to be combined into one, and becomes one and can gather 1 speed component of same acceptance point and the acquisition station of 3 components of acceleration simultaneously.
- 8. wave detector according to claim 1, it is characterized in that described Testing of Feeble Signals and feedback circuit ASIC are Testing of Feeble Signals and the feedback circuit ASIC that low noise capacitance signal amplifies and great dynamic range amplifies, and reach high dynamic range after coordinating with MEMS (micro electro mechanical system) earthquake 3 component acceleration transducer MEMS Sensor.
- 9. according to wave detector described in claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8, it is characterized in that one-piece construction is comprised of upper cover R1, outgoing cable R2, circuit board R3, quadrature 3 component seismic sensor MEMS Sensor, moving-coil geophone CG, shell R4 and tail cone R5 etc.; Shell R4 is 2 layers of structure, and moving-coil geophone CG places in bottom in lower floor, places 3 component sensor MEMS Sensor on moving-coil geophone CG, and shell R4 places circuit board R3 in inner upper strata; Testing of Feeble Signals and feedback circuit ASIC, digital unit ADU, control module CM, data communication units CI and supply module PM are integrated on circuit board R3; Moving-coil geophone CG, 3 component sensor MEMS Sensor and circuit board R3 are encapsulated in shell R4 by upper cover R1, moving-coil geophone CG draws signal wire and is connected to circuit board R3 above, and 3 component sensor MEMS Sensor also draw signal wire and are connected on circuit board R3.
- 10. wave detector according to claim 9, is characterized in that drawing two pairs of cables by circuit board R3, and wherein a pair of land that is responsible for powers with 4 component digital geophone 1V3A, and another is to as data line, and tail cone is arranged on the lower end of shell and as grounded parts.
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| WO2015013839A1 (en) * | 2013-08-02 | 2015-02-05 | 中国科学院地质与地球物理研究所 | Land-use velocity and acceleration double-parameter multi-component digital geophone |
| CN104652396A (en) * | 2015-01-20 | 2015-05-27 | 重庆大学 | Three-component roadbed karst cave detection sensor and detection system |
| CN105388514A (en) * | 2015-10-28 | 2016-03-09 | 中国石油天然气股份有限公司 | Seismic omnidirectional vector electrostatic suspended detector |
| CN106199688A (en) * | 2016-06-29 | 2016-12-07 | 成都理工大学 | It is integrated with high accuracy three-component microseism cymoscope and the implementation method of actively focus |
| CN107272052A (en) * | 2017-06-15 | 2017-10-20 | 中石化石油工程技术服务有限公司 | Closed-loop digital acceleration detector |
| CN107300716A (en) * | 2017-06-30 | 2017-10-27 | 黄河勘测规划设计有限公司 | For D S H ripples or the smart detectors device of multi-wave seismic survey |
| US10578757B2 (en) | 2015-10-28 | 2020-03-03 | Petrochina Company Limited | Omnidirectional vector seismic data processing method and apparatus, computer-readable storage medium and device |
| US10739477B2 (en) | 2015-10-28 | 2020-08-11 | Petrochina Company Limited | Omnidirectional vector geophone |
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| CN107272052A (en) * | 2017-06-15 | 2017-10-20 | 中石化石油工程技术服务有限公司 | Closed-loop digital acceleration detector |
| CN107272052B (en) * | 2017-06-15 | 2023-10-31 | 中石化石油工程技术服务有限公司 | Closed-loop digital acceleration detector |
| CN107300716A (en) * | 2017-06-30 | 2017-10-27 | 黄河勘测规划设计有限公司 | For D S H ripples or the smart detectors device of multi-wave seismic survey |
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