CN201548699U

CN201548699U - Digital ground listening device

Info

Publication number: CN201548699U
Application number: CN2009202718209U
Authority: CN
Inventors: 沙克伦; 沙雪峰; 沙鲲鹏
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-11-19
Filing date: 2009-11-19
Publication date: 2010-08-11
Anticipated expiration: 2019-11-19

Abstract

The utility model discloses a digital ground listening device, comprising a three-component digital detector or a three-component MEMS sensor, a filter, program control amplifier, a 50/60Hz notch filter, a matched amplifier, an A/D converter, a GPS satellite's orientation-timepiece system, a controller and logic circuit and a transmission bus interface, wherein three-path output of the three-component digital detector passes by the filter, the program control amplifier, the 50/60Hz notch filter and the matched amplifier in order and achieves the synchronous A/D converter, and is then input to the controller and logic device after convertion; the controller and logic circuit is linked with an RS485 interface and a GPS system; and the receiving point is positioned by the GPS system.

Description

Digitally listen instrument

Technical field

The present invention relates to a kind of instrument of digitally listening, be applied to fields such as oil, geology, coalfield, engineering exploration, also can be used for microearthquake (subsurface rock breaks) monitoring and underground installation movement of objects or vibration monitoring.

Background technology

Ground is listened and is claimed urn to listen again, is applied to the earliest in the city defence war of the Warring States Period.Just be useful on the equipment that detecting has the sound source target azimuth in China's ancient war.Put down in writing according to " Mo-tse is equipped with the cave ": when the person of defending city finds that the enemy army digs the tunnel, dig a well under the interior wall of city immediately, place the new cylinder of a bite in the well, the cylinder mouth covers the thin ox-hide of one deck, makes the clever and quick people's volt of hearing on cylinder, monitors enemy's sound.The sound equipment that is taken place when the enemy digs the tunnel is at the speed height of underground propagation, and it is little to decay, and evokes cylinder body resonance easily, thereby can detect the orientation at underground enemy place.

Oil and natural gas is non-renewable resources, is the important strategic goods and materials, and petroleum exploration instrument is the geophysical survey equipment of core the most.Present petroleum exploration instrument aspect, China is in backward state always for a long time, the basic all dependence on import of domestic prospecting instrument, this has seriously restricted the development of China's oil earthquake physical prospecting cause and petroleum industry.

The vibrations of artificial earthquake (explosive is imbedded face of land blast and excited the vibrations of Controlled Source Car) cause seismic event, to underground propagation, cause the reflection wave on stratum by the face of land.This patent is used for the oil field secondary development with this Simple and Reliable monitor method, in the oil extraction process, use pressure break, water filling, notes vapour, gaza's technology, cause near the rock breakdown of oil reservoir, the shock wave of rock burst is received by seismoreceiver or MEMS sensor, through instrument amplification, analog to digital conversion, data processing, calculating, layout, storage,, instruct the development and utilization once more of underground petroleum and rock gas according to the information of collecting.

, no matter be domestic or external, existing earthquake digital instrument is vehicle-mounted instrument more than 95%, and is bulky, weight big, difficulty is moved in carrying.For some area, river, mountains and rivers, instrument truck can't arrive survey line at all, needs people's half the circumference of the sleeve where it joins the shoulder to shoulder or the helicopter handling, causes very big expense on the human and material resources.

This patent is exactly at above-mentioned deficiency, and the high-quality, low-power consumption of needs such as petroleum prospecting, coal exploration, ore prospecting, novel ground observation instrument light, easy to operate, with low cost are satisfied in design---and digitally listen instrument and use this ground of digitally listening instrument to listen information high density recording system.

Summary of the invention

This patent provides a kind of instrument of digitally listening, comprise three-component moving-coil type digital geophone or three-component MEMS sensor, wave filter, programmable amplifier, the 50/60HZ trapper, adapter amplifier, A/D converter, satnav time service [GPS] system, controller and logical circuit, the transfer bus interface, wherein wave filter is passed through in three tunnel outputs of three-component digital geophone in proper order, programmable amplifier, the 50/60HZ trapper, arrive synchronous A/D converter behind the adapter amplifier, after conversion, be input to controller and logic device, controller and logical circuit are connected with RS485 interface and gps system, and acceptance point is located by gps system.

Wherein programmable amplifier adopts CS3301 type ground to listen amplifier.

Wherein A/D converter adopts ADS1274 high-precise synchronization A/D converter.

Wherein interface adopts FPGA.

Its middle controller adopts the ARM2440 single card microcomputer.

Wherein transfer bus adopts the RS485 bus.

Controller and FPGA have memory storage, and wherein memory storage is the USB flash disk by the USB port operation.

Description of drawings

Fig. 1 listens information high density recording minimum system figure two-dimensionally for this patent composition;

Fig. 2 listens information high density recording minimum system figure for this patent composition three-dimensionally;

Fig. 3 is the structured flowchart that instrument is listened on this patent ground.

Specific embodiment

As shown in Figure 1, the composition that wherein shows this patent is listened information high density recording minimum system figure two-dimensionally, it can comprise that 6 are digitally listened instrument, an intersection station, two data transmission cables, digitally listen instrument by data transmission cable with intersect the station and carry out communication, it is a kind of concentration of local formula management system, digitally listen instrument though show 6 among Fig. 1, its quantity is not limited to 6, and the instrument of digitally listening more than 2 can be realized this patent.

As shown in Figure 2, what show wherein that this patent forms listens information high density recording minimum system figure three-dimensionally, and it listens information high density recording minimum system to constitute by four shown in Figure 1 two-dimensionally, both-way communication between respectively intersection is stood.

As required, those skilled in the art can make up by separate unit, be the three-dimensional geophysical survey of two dimension or tens thousand of road, the flexible solution that satisfies the number needs is provided, it need not heavy cable, need not main frame, need not huge instrument truck, make the number of devices of floor portion heat reduce, environmental impact is dropped to floor level.

Each several part to system describes in detail below.

As shown in Figure 3, what wherein show this patent digitally listens instrument, it comprises the three-component digital geophone, wave filter, programmable amplifier, the 50/60HZ trapper, adapter amplifier, synchronous A/D converter, satnav time service [GPS] system, controller (present embodiment is an ARM2440 industry single-chip microcomputer) and logical circuit, transfer bus interface---long line transmission RS485 interface, wherein wave filter is passed through in three tunnel outputs of three-component digital geophone in proper order, programmable amplifier, the 50/60HZ trapper, arrive synchronous A/D converter behind the adapter amplifier, after conversion, be input to controller and logical circuit, controller and logical circuit have memory function, for example deposit USB flash disk in by USB port, controller and logical circuit are connected with RS485 interface and gps system, and acceptance point is located by GPS.Three-component digital geophone in the present embodiment can be replaced by three-component MEMS sensor.

This patent digitally listen three signal sampling channels of instrument, both can three simple component collections, can carry out three-component acquisition again, reach the collection dirigibility, decided the basis for exchanging the micro electronmechanical three-component seismometer of the MEMS shop of using.But both Dan Zhansan road independence networkings of instrument are digitally listened in explanation once more, can pass through the RS485 networking again.

Because reflection wave, refraction wave is subjected to formation influence, generalized case can weaken gradually, and be subjected to electromagnetism and the face of land the rustle of leaves in the wind making underground microseism waveform that distortion take place and disturbing, this just requires these interference waves are filtered out, again significant wave after the filtering is carried out distortionless amplification, these significant waves are controlled within the voltage amplitude scope of analog to digital converter best transition.This just requires programmable amplifier must have the characteristics of superior noisiness and minimum rate of total harmonics, ground listens amplifier CS3301 exactly to have the advantage of good noiseproof feature and minimum rate of total harmonics, just in time is applicable to the Detection of Weak Signals field.

After the simulated earthquake signal is amplified to 2-4VPP, the best transition interval of AD converter exactly, it is a high-precise synchronization A/D converter that this patent adopts ADS1274, has 24 precision, be a kind of new A/D converter of wide dynamic range, can realize 4 passage synchronous data collections.ADS1274 has the bandwidth of 62kHz, and the highest sample frequency can reach 128KS/s, and key property comprises: 1. adopt differential input mode, so input end can be directly linked to each other with sensor or small voltage signal; 2. adopt ∑ one Δ structure, have wide in range dynamic range and 24 error-free codings; 3. adopt low noise gain programmable amplifier (PGA), can be dynamic range expanded, improve resolution; 4. inner employing three exponent number character filters, but filter out power ripple and other interference; 5. adopt multiple inner self-correcting technology, be used to proofread and correct offset voltage, the calibration full-scale error; 6. SPI or FRAME-SYNC interface are provided; 7. provide high speed, high resolving power, low-power consumption and 4 kinds of mode of operations of low speed to select for the user; 8. adopt independently-powered ,+5V analog power, the 1.8V digital power,

Go into FPGA by the road preface by the SPI oral instructions by the digital quantity after the ADS1274 conversion, after changeing also, the FPGA string enters the ARM2440 single card microcomputer, in ARM, carry out digital filtering, still depositing USB in the geophysical data form then, become independently data acquisition station by the road preface. another road is delivered to intersect by the long line of standard RS485 communication mode (100-500M) transmission and is stood.

During work, underground vibration information is received by digital geophone or MEMS sensor, the analog quantity information that receives is sent into wave filter, remove clutter, preserve significant wave, this waveform is sent to programmable amplifier and amplifies, insert the 50/60HZ trapper again, eliminating external industrial alternating current disturbance, insert adapter amplifier again, is the best input value of analog to digital converter by the simulating signal after the adapter amplifier conditioning just.Three component X, Y, Z analog quantitys through the conversion synchronously of synchronous moduluses after, formed the digital quantity that X, Y, Z chronologically put by the road through FPGA string and conversion.This digital quantity is handled through ARM2440 industry single-chip microcomputer and is deposited in the USB flash disk by USB port by the SHAKELUN data layout, and data can upload to host computer intersection station with 10MBP/S by the long line transmission of RS485 interface at any time in the USB flash disk.

The instrument of digitally listening of this patent has 24 bit resolutions, the instantaneous dynamic range of 120dB, and the input noise less than 0.2 μ V has high density, and high resolving power, great dynamic range, high s/n ratio, high fidelity are with three roads storage ability.

The instrument sampling rate of digitally listening of this patent is 1/8,1/4,1/2,1.0,2.0,4.0,8.0 and 16.0ms, and it both had been suitable for coalfield and exploration of oil and gas field, also was suitable for shallow seismic exploration.

The instrument of digitally listening of this patent has independent the collection and memory function, can be placed on the medium-term and long-term monitoring in oil field oil extraction process, underground structure variation separately, can be considered a three-component or three road seismographs independently, put separately for several, can be used in the oil extraction process subsurface rock monitoring of breaking.

Behind the power supply opening of digitally listening instrument of this patent, need not artificial interference, for a long time by preset program work, have set up flexibly, characteristics that cost is low, safeguard, expansion is very convenient.

Data acquisition is for reaching tens thousand of roads, reach starting synchronously, under GPS time service pulse control, used CLK per second is calibrated by the time service pulse per second (PPS) of GPS, must receive three satellite useful signal location simultaneously could be accurately, the satnav time service information could be stored as valid data, and after the data storage, first time service pulse front edge that satellite comes again is as enabling pulse.

Digitally listen instrument to adopt the 12V solar cell for supplying power.

As seen from the above description, the instrument of digitally listening of this patent is the data file of SHKELUN form with the data storage that collects, the data of multiple spot collection convert geophysics form (SEG-Y) to after concentrating at last, so that the later stage handles, analyzes, obtain useful information.

This patent ground listens information high density recording system to carry out digital filtering in data acquisition, belongs to the first in the geophysical survey process, is more conducive to significant wave and shows, improves the raw readings signal to noise ratio (S/N ratio)

This patent ground listens information high density recording system in North China Oilfield, the Liaohe Oil Field, and the Zhongyuan Oil Field, Sichuan, monitor in the wellfracturing processes such as northern Shensi on the spot in Guangxi.

The information high density recording system benchmark that clocks is listened in the GPS pulse per second (PPS) with being, in two dimension or three-dimensional construction, no matter adopts how many platforms digitally to listen instrument, and timekeeping system is all undertaken by the GPS pulse synchronously.

Have real-time monitoring and control, information writes down accurately and reliably, and the later stage geologic information is handled identical with the conventional survey Data Processing, only needs SEG-Y form data USB flash disk is handed over computing center, or mail to computing center by the ENTER net after layout.

Ground listen adopted in the information high density recording system digitally listen instrument, intersect the station all to design voluntarily by me. be important composition of the present invention partly.

The foregoing description only is preferred and exemplary; those skilled in the art for example can be according to the description of this patent; adopt different amplifier, analog to digital converter, controller, transfer bus, memory storage to wait and realize this patent, it is all covered by the protection domain of this patent.

Claims

1. digitally listen instrument for one kind, comprise three-component moving-coil type digital geophone or three-component MEMS sensor, programmable amplifier, wave filter, the 50/60HZ trapper, adapter amplifier, A/D converter, satnav time service [GPS] system, controller and logical circuit, the transfer bus interface, wherein wave filter is passed through in three tunnel outputs of three-component digital geophone in proper order, programmable amplifier, the 50/60HZ trapper, arrive synchronous A/D converter behind the adapter amplifier, after conversion, be input to controller and interface FPGA, controller and logical circuit are connected with RS485 interface and gps system, and acceptance point is located by gps system.

2. the instrument of digitally listening as claimed in claim 1, wherein programmable amplifier adopts CS3301 type ground to listen amplifier.

3. the instrument of digitally listening as claimed in claim 1 or 2, wherein A/D converter adopts ADS1274 high-precise synchronization A/D converter.

4. as the described instrument of digitally listening of one of claim 1-3, its middle controller adopts the ARM2440 single card microcomputer.Or other type single-chip microcomputer.

5. as the described instrument of digitally listening of one of claim 1-4, wherein transfer bus adopts the RS485 bus.

6. as the described instrument of digitally listening of one of claim 1-5, controller and FPGA. have memory storage.

7. the instrument of digitally listening as claimed in claim 6, wherein memory storage is the USB flash disk by the USB port operation.