CN100348834C - Ultrasonic well logging instrument - Google Patents
Ultrasonic well logging instrument Download PDFInfo
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- CN100348834C CN100348834C CNB2004100361260A CN200410036126A CN100348834C CN 100348834 C CN100348834 C CN 100348834C CN B2004100361260 A CNB2004100361260 A CN B2004100361260A CN 200410036126 A CN200410036126 A CN 200410036126A CN 100348834 C CN100348834 C CN 100348834C
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Abstract
The present invention discloses an ultrasonic well logging instrument which comprises a downhole instrument subsystem, transmission signals, a ground instrument subsystem and a computer subsystem, wherein the downhole instrument subsystem is used for transmitting ultrasonic pulse signals, receiving reflective and ultrasonic signals of well casings, making the reflective and ultrasonic signals of well casings converted to electrical pulse signals, and making the receiving signals carry out amplification, filtration and transformation processing; the transmission signals are used for providing suitable and matched electric energy for the downhole instrument subsystem, generating synchronous pulse and receiving the transmission signals of the downhole instrument subsystem; the ground instrument subsystem is used for the amplification and transformation processing and other relevant data collection of the transmission signals; the computer subsystem is used for the integrated collection and processing of the data, and a data circuit is connected between the computer subsystem and the ground instrument subsystem. The present invention can be well used for the measurement of small calibers and the well casings in mud with small specific gravity and can be well suitable for the measurement of the large caliber deep wells, such as well casings with 3.0m to 12m of well diameters and more than 1000m of well depth, and the ultrasonic well logging instrument can also reliably operate in mud with great specific gravity (for example: the specific gravity is no greater than 1.2) or industrial water media.
Description
Technical field
The present invention relates to a kind of ultrasonic logging equipment.
Background technology
Ultrasonic logging equipment of the prior art is only applicable to small-bore pit shaft measurements such as oil well, media environment is an industry water or little of in the weighted mud, the index that can detect is also limited, far can not satisfy heavy caliber deep-well Testing requirement such as colliery drilling well and nuclear industry drilling well.
Summary of the invention
It is a kind of applicable to heavy caliber deep-well ultrasonic logging instrument that task of the present invention is to provide, it can be in larger specific gravity mud or medium such as industrial water use in work, can provide about technical datas such as borehole wall inclination, hole diameters, guarantee for the construction that becomes well provides effect technique.
Its technical solution is:
Ultrasonic logging instrument of the present invention comprises:
(i) be used for launching ultrasonic pulse signal, receive borehole wall reflected ultrasonic and also convert thereof into electric impulse signal, and amplify to received signal, the down-hole instrument subsystem of filtering and conversion process;
(ii) be used for to down-hole instrument subsystem provides suitable coupling electric energy, the generation of lock-out pulse, the transmission signal of instrument subsystem under the received well amplifies and conversion process transmitting signal, and the aboveground instrument subsystem of other related data collection;
(iii) be used for data are carried out the computer subsystem of synthetical collection and processing, connect by data circuit between computer subsystem and the aboveground instrument subsystem;
(iv) be used for the degree of depth instrument subsystem that instrument is transferred the degree of depth under the measuring well, above-mentioned aboveground instrument subsystem comprises that also data acquisition process and the depth value to degree of depth instrument transmission signal shows;
(v) be used between down-hole instrument subsystem and aboveground instrument subsystem, carrying out the signal transmission, and promote and transfer the transmission cable and the winch subsystem of down-hole instrument subsystem;
(vi) be used for determining the positioning rope and the winch subsystem in orientation, down-hole for down-hole instrument subsystem; And
(vii) be used for showing the oscillograph subsystem of observing real-time waveform.
Above-mentioned aboveground instrument subsystem also can comprise adjustable gain and adjustable interference control.
Above-mentioned down-hole instrument subsystem comprises the ultrasonic probe of a closed shell and selected quantity, and ultrasonic probe is used to transmit and receive pulse ultrasonic wave; Be provided with circuit part in the closed shell, circuit part can comprise Drive Module, input module, filter module, amplification adjustment module, switch selection module, level translation module, down-hole microprocessor module, signal transmission module, downhole system power module; Above-mentioned aboveground instrument subsystem can comprise complete machine power module, probe power supply module, depth data collection and processing circuit module, ultrasonic receiving conversion and processing circuit module, data acquisition and communication circuit module, motherboard circuit module, display circuit module; Above-mentioned degree of depth instrument subsystem, comprise the photoelectric code disk that pulley links to each other with pulley, the transmission cable of hanging down-hole instrument subsystem closed shell is on the pulley of degree of depth instrument subsystem, and drive pulley rotation, the pulley of rotation drives photoelectric code disk, photoelectric code disk is when wheel turns generation two-way homophase or anti-phase square-wave signal, and square-wave signal is connected to the depth data collection and the treatment circuit of aboveground instrument subsystem by cable; Above-mentioned transmission cable and cable reel subsystem, the connection of transmission cable one end is also hung down-hole instrument subsystem, the other end connects aboveground instrument subsystem, the above ground portion of transmission cable is wound on the cable reel, and transmission cable can be the armouring seven core cable, and seven cores of cable are corresponding power, power supply ground, data signal ground, synchronizing signal, emission voltage, simulation ultrasonic signal respectively, the armature of cable layer is that two-layer finer wire constitutes, cable reel is equipped with seven core slip rings, can manually or automatically control; Above-mentioned positioning rope and winch subsystem, positioning rope is two flexible steel wires, the lower end hangs weight, article two, keep at a certain distance away between the wire rope, transfer and rolling by pulley by winch, article two, wirerope pilot hole that passes the up and down a pair of horizontal extension bar that is positioned at the left side on the instrument subsystem closure casing of down-hole wherein, another passes the pilot hole of a pair of horizontal extension bar up and down that is positioned at the right side; Above-mentioned oscillograph subsystem, this oscillograph has four autonomous channels and an external trigger passage, signal behind ultrasonic signal after four passages connect certain probe that aboveground instrument subsystem sends here respectively and amplify, the amplitude discrimination, do control signal, range finding square-wave signal, each probe is then switched by the multichannel Multi-band switch; Aforementioned calculation loom system is used for online or off-line provides borehole wall inclination, hole diameter, useful area, eccentricity technical data and data storage, the inquiry of historical data operation.
The present invention transfers to down-hole instrument subsystem in the tested pit shaft, after the tested degree of depth is stopped, using ultrasound ripple range measurement principle is to the borehole wall scanning of finding range, when the electric pulse of ultrasonic transmit circuit generation is added to a ultrasonic probe, directionally send ultrasonic signal by this ultrasonic probe, this signal is propagated in well mud, running into borehole wall back reflection returns, received by ultrasonic probe again, and be converted to electric impulse signal, so far promptly finish one-shot measurement.If the spread speed of ultrasonic wave in mud is known, accurately measure the time between transmitting and receiving, can draw at this ultrasonic probe on this plane cross section to the distance between the well group, the timesharing of ultrasonic emitting signal can be added on other ultrasonic probe, can measure the distance of this plane cross section ultrasonic probe other each point to the borehole wall thus; Down-hole instrument subsystem is mainly finished the emission of ultrasonic signal and the reception of reflected ultrasonic, the ultrasonic signal that receives is amplified, passes to aboveground instrument by cable after the filtering, conversion process, the power supply of aboveground instrument subsystem responsible whole system, the generation of lock-out pulse, after the ultrasonic signal that down-hole instrument subsystem is sent here amplifies, conversion etc. handled, through processes such as data acquisitions, and give computer subsystem with various signal datas; The down-hole instrument adopts and amplifies, the effect of filtering and conversion process is that received signal is processed into the signal that is suitable for long Distance Transmission, improve antijamming capability, aboveground instrument subsystem is that the signal that contains noise that will decay amplifies again to the amplification of transmission signal and the effect of conversion process, de-noising, so that subsequent treatment, therefore, the present invention can not only be used for the measurement of small-bore and little wall pit shaft better, can be applicable to preferably that also heavy caliber deep-well such as hole diameter are 3.0m-12m, well depth is the above pit shaft of 1000m, also can work reliably in big proportion (as proportion＜=1.21) mud or industrial water use medium.Above-mentioned data-signal can be handled through aboveground instrument subsystem and computer subsystem, and can be shown the borehole wall figure of this plane cross section by computer subsystem, then, continues to transfer down-hole instrument subsystem again, carries out the measurement of another plane cross section.Coordinate relation according to down-hole instrument subsystem setting point and pit shaft design centre, can utilize computer subsystem to calculate the actual diameter of each plane cross section, the deflected position and the orientation angles of the relative design centre of practical center of pit shaft obtain horizontal sectional view, vertical profile, wellbore centre deflection perspective view etc. by output equipment.Certainly the scope degree etc. that obtains about technical datas such as borehole wall inclination, hole diameters selects for use configuration software etc. relevant with arithmetic facility of the present invention, and the present invention is not necessity to obtain above-mentioned overall technique parameter.In addition, aboveground instrument subsystem also can be taked modes such as adjustable gain and adjustable interference control, can make things convenient for the user according to actual needs, as making instrument bring into play usefulness on the spot better according to constantly changing hole diameter and different medium parameter, adjusting voluntarily.The present invention also comprises, be used for the degree of depth instrument subsystem that instrument is transferred the degree of depth under the measuring well, above-mentioned aboveground instrument subsystem comprises that also data acquisition process and the depth value to degree of depth instrument transmission signal shows, utilize this degree of depth instrument subsystem, can measure the actual grade that down-hole instrument subsystem is transferred real-time and accurately, and carry out data acquisition process and depth value by aboveground instrument subsystem and show, accuracy and automaticity are higher, also being convenient to computer subsystem utilizes its real time data to carry out relevant computing, discharge the mode that hand dipping fathom amount down-hole part is transferred the degree of depth than available technology adopting, improved accuracy and automatization level and production efficiency.Ultrasonic logging instrument of the present invention also comprises, be used between down-hole instrument subsystem and aboveground instrument subsystem, carrying out the signal transmission, reach the transmission cable and the winch subsystem that promote and transfer down-hole instrument subsystem, utilize this transmission cable except that providing the transmission channels such as data-signal for down-hole instrument subsystem and aboveground instrument subsystem, also can utilize this transmission cable directly to hang down-hole instrument subsystem, utilize the transmission cable winch to promote and transfer down-hole instrument subsystem, simple in circuits, compact conformation, can effectively overcome and adopt transmission cable only to carry out the signal transmission, what other was provided with that the down-hole instrument hangs that rope is used for its lifting and transfers that technical approach brings easily causes circuit mixed and disorderly, the drawback that lifting appliance is many.But above-mentioned transmission cable double as is the measurement rope of degree of depth instrument subsystem, measures rope and compares simple in circuits, one-object-many-purposes with being provided with separately for degree of depth instrument.Ultrasonic wave logging instrument of the present invention also comprises and is used for showing the oscillograph subsystem of observing real-time waveform, by the real-time waveform of observation oscilloscope subsystem, for regulating Other Instruments in real time, accurately measures and lays the foundation.
The ultrasonic probe of above-mentioned down-hole instrument subsystem can be 4, all is divided into four orientation to 360 °, and each ultrasonic probe is arranged on one of them orientation, and the timesharing of 4 probes transmit and receive pulse ultrasonic wave.This mode is fixed on down-hole instrument subsystem on the degree of depth, can measure the distance of four orientation boreholes wall, can effectively reduce the adjustment that turns to of down-hole instrument subsystem.
The Drive Module of above-mentioned down-hole instrument subsystem is to select under the control of module at control signal and switch, and the trigger voltage that above-mentioned aboveground instrument subsystem is sent here is added on the corresponding ultrasonic probe, makes probe vibration and produces ultrasonic wave; Above-mentioned input module receives echo-signal, and does certain preliminary treatment; The circuit of filter module is made up of a low pass filter, a high-pass filter and active amplifier section, can select required CF; Above-mentioned amplification adjustment module adopts the capacitance-resistance feedback network that above-mentioned CF is amplified and handles; Above-mentioned switch selects module to select for use multichannel four to select an analog switching circuit, and gating under the control of control impuls and address signal, the signal of gating comprise probe control signal and ultrasonic signal; Above-mentioned level translation module is that the signal that the down-hole microprocessor is sent here is carried out shaping, conversion, in order to the analog switching circuit in the gauge tap selection module; Above-mentioned down-hole microprocessor module mainly is that the synchronizing signal that aboveground instrument subsystem is sent here is handled again, and sends clock signal and address signal, and the work of down-hole instrument subsystem is coordinated in control; Above-mentioned signal transmission module is that the ultrasonic signal with gating amplifies, is transformed into and has the strong signal of antijamming capability and transmittability and pass to aboveground instrument subsystem by transmission cable; The downhole system power module is responsible for giving whole down-hole instrument circuit that required power supply power supply is provided.
The synchronizing signal of instrument subsystem on the down-hole microprocessor module received well in the instrument subsystem of above-mentioned down-hole, provide the channel address of first ultrasonic transducer, send control impuls, gauge tap is selected first passage of analog switching circuit gating in the module, and Guan Lian first transducer is just started working with it; Then, provide next ultrasonic transducer channel address, send out control impuls, next passage of gating and ultrasonic transducer every 40ms; Control above-mentioned 4 ultrasonic transducer work successively, finish a work period; The downhole system power module sends aboveground instrument subsystem here+20V voltage voltage regulation filtering after, output+12V ,+6V ,-6V supplies with other analog module except that down-hole microprocessor module and level translation module respectively, as supply voltage and reference voltage, general+5V voltage is given down-hole microprocessor module and level translation module as operating voltage; The synchronizing signal of instrument subsystem on the down-hole microprocessor module received well in the instrument subsystem of above-mentioned down-hole, down-hole microprocessor module output control and address signal to level translation module are carried out waveform shaping and conversion, be input to multichannel four afterwards again and select an analog switching circuit, the triggering signal of analog switching circuit gating is added on the ultrasonic probe through Drive Module, the switch of control probe piezo-electric crystal; Ultrasonic signal on the probe is sent into input module, is input to filter module after its preliminary treatment, arrives afterwards again and amplifies adjustment module; Four road ultrasonic signals are all sent into analog switching circuit and are carried out gating after the processing of four groups of separate circuit, the signal of gating is delivered to aboveground instrument subsystem part by transmission cable after sending into the signal transmission module changing and shaping again.
Down-hole microprocessor module in the instrument subsystem of above-mentioned down-hole can send control impuls again after sending channel address 2ms.
The complete machine power module of above-mentioned aboveground instrument subsystem adopts the switching power supply of alternating current 220V input, working power is provided for aboveground instrument and provides+the 20V direct current to down-hole instrument subsystem; Probe power supply module adopts 220v to exchange input, the transformer that exchanges output more, and carrying out rectifying and wave-filtering after Multi-band switch is selected is the ultrasonic probe power supply, voltage range be direct current+12V～+ 250V; Above-mentioned depth data collection and processing circuit module mainly contain input interface, handle reshaper, microprocessor, the photoelectric code disk of degree of depth instrument subsystem is when wheel turns generation two-way or homophase or anti-phase 3600/circle square-wave signal, handle reshaper this two paths of signals is carried out the shaping processing, output is the square-wave signal after the shaping, another output is the rotating signal, deliver to the T0 and the T1 of microprocessor respectively, be used for counting and judgement, microprocessor is provided with two counters of rotating and two snubbers, come a square wave, judge current turning to, after microprocessor received the synchronizing signal that collection plate sends, this module will send to the depth value of current section in the processor of data acquisition and telecommunication circuit by serial port; Display circuit module has the drive circuit of triggering and digital display tube, in order to show the depth value of probe position in the well; Above-mentioned ultrasonic receiving conversion and processing circuit module comprise ultrasonic signal conversion amplifying circuit, the analog switch gating circuit, four road gain adjusting circuits, four road amplitude discrimination circuits for triggering, four road dried control circuits, range finding square-wave signal circuit, ultrasonic signal conversion amplifying circuit adopts high speed operation amplifier, the ultrasonic signal that the down-hole instrument is sent here carries out the conversion amplification, obtain follow-up required signal, the analog switch gating circuit is under the effect of control signal and address signal, four road ultrasonic signals of transmission are chronologically taken out respectively, give four tunnel separate gains, amplitude discrimination, do control and range-measuring circuit, then again they being combined into one road signal chronologically transmits backward, gain adjusting circuit is made of high speed operation amplifier and corresponding network, ultrasonic signal is amplified, the amplitude discrimination circuits for triggering constitute Schmidt trigger by digital circuit, its activation threshold value can be adjusted, dried control circuit is made of the two-stage trigger, range finding square-wave signal circuit is the output according to trigger, drive by drive circuit again, obtain the square wave distance measuring signal of enough carrying load abilities; Above-mentioned data acquisition and communication circuit module mainly are made of the communication interface circuit of microprocessor, coder, trigger, RS232 standard; Connect each functional module and wiring board by above-mentioned motherboard circuit module.
Above-mentioned technical approach, after amplifying adjustment module employing capacitance-resistance feedback network amplification processing, by multichannel multistage analog switch gating, the ultrasonic signal of gating amplifies through signal transmission module, the signal of voltage-type is converted to the signal of current mode, be transformed into and have the strong signal of antijamming capability and transmittability and pass to aboveground instrument subsystem by transmission cable, help to realize frequency domain filtering and obtain the close echo-signal of amplitude at the different distance place, can effectively overcome ultrasonic wave because of big distance or big than media such as weighted mud in transmission amplitude increase the defective of the quickening that descends with distance; The function that aboveground instrument subsystem amplifies conversion is that the signal that contains noise of will decay amplifies again, de-noising, so that subsequent treatment, and aboveground instrument subsystem also adopts adjustable gain, does control etc., can cater to different situations better, as the hole diameter and different mud parameters that changes, select four the tunnel independently circuit be in order to regulate the signal of handling each road respectively and meticulously, avoid the phase mutual interference, adopting RS232 is in order to improve transmitting speed, can directly to arrive the mode of RS232 certainly with RS232 to the transmission conversion of USB2.0.Can make the present invention can better be applicable to the heavy caliber deep-well, and the pit shaft under the big proportion slurry environment is measured.
The microprocessor of above-mentioned data acquisition and communication circuit module, two timer can be finished regularly 40ms, pulsewidth, double as Baud rate generator are surveyed in timing, T1 is operated in mode 2 as Baud rate generator, produce the baud rate of 9600bps, T0 is operated in mode 3, as two timers, TL0 regularly surveys pulsewidth, and TH0 is 40ms regularly; Above-mentioned distance measuring signal becomes two signals through handling, one is inversion signal, another is an in-phase signal, deliver to respectively on the external interrupt X0 and X1 of microprocessor, two external interrupt are arranged to the edge triggering mode, when range finding square-wave signal trailing edge arrived, external interrupt 1 was interrupted, and the interruption of opening X0 allows, TH0 begins regularly, when the low level end, when rising edge arrived, external interrupt 0 was interrupted, stop regularly, read count value and also preserve in the corresponding buffer, this count value is exactly the propagation time of ultrasonic wave in pit shaft, and survey data is sent to PC through communication interface and further handles.
Above-mentioned data acquisition and communication circuit module also have following feature, with 160ms is a work period, be divided into 4 time periods, each time period is 40ms, provides the address in each time period, sends out synchronizing signal, measures pulse width, prepares measuring operation next time; This module is carried out reading of depth data the 3rd time period; This module is carried out transfer of data when the 4th time period finishes.
Can be provided with ultrasonic receiving conversion and treatment circuit plate slot, depth data collection and treatment circuit plate slot, data acquisition and communicating circuit plate slot, transmission cable socket, degree of depth instrument cable socket, serial communication cable socket, electrical socket on the above-mentioned motherboard circuit module; Board in circuit board slot adopts the accurate STD bus standard of 48 footnotes.
Above-mentioned degree of depth instrument subsystem, the transmission cable of hanging down-hole instrument subsystem closed shell are on the pulley of degree of depth instrument, and the pulley size is passed by one meter for the pulley transmission cable that rotates a circle; Above-mentioned photoelectric code disk produces the square-wave signal of 3600 of two-way/circle with wheel turns.
Above-mentioned positioning rope and winch subsystem can be made of two positioning ropes and winch subsystem, each positioning rope and winch subsystem are by winch, browpiece and a fixed pulley, wire rope, reel, weight, motor, base support, and be positioned at two wire rope positioners on the instrument subsystem closed shell of down-hole, be separately positioned on the upper and lower of housing, can rotate around housing respectively; Each wire rope positioner can have horizontal extension bar, annular ring, lock screw and be positioned at the steel cable pilot hole at level frame extension rod two ends; Article two, the distance between the wire rope is a length between every horizontal extension bar two ends pilot hole.
Description of drawings
Fig. 1 is a kind of embodiment system principle of compositionality of ultrasonic logging instrument of the present invention schematic diagram.
Fig. 2 is the structural principle schematic diagram of a kind of embodiment of down-hole instrument subsystem of the present invention.
Fig. 2 A is the ultrasonic probe positional structure schematic diagram of down-hole instrument subsystem.
Fig. 2 B is the horizontal positioning device structural representation in positioning rope of the present invention and the winch subsystem.
Fig. 3 is the circuit working principle schematic of down-hole instrument subsystem.
Fig. 3 A is the down-hole microprocessor module circuit diagram among Fig. 3.
Fig. 3 B is a control mode program flow diagram among Fig. 3 A.
Fig. 3 C is driver module and the input module circuit diagram among Fig. 3.
Fig. 3 D is the level translation module circuit diagram among Fig. 3.
Fig. 3 E is the amplification adjustment module circuit diagram among Fig. 3.
Fig. 3 F is the filtration module circuit diagram among Fig. 3.
Fig. 4 A shows a kind of structural principle schematic diagram of front panel of aboveground instrument subsystem.
Fig. 4 B shows a kind of structural principle schematic diagram of rear board of aboveground instrument subsystem.
Fig. 5 is the ultrasonic signal processing module circuit diagram of aboveground instrument subsystem.
Fig. 6 A is the oscillogram of each period of ultrasonic signal of aboveground instrument subsystem.
Fig. 6 B is the CPU time sequential pulse figure of synchronizing signal and down-hole instrument subsystem.
Fig. 7 is the data acquisition and the communication module circuit diagram of aboveground instrument subsystem.
Fig. 8 is the depth data acquisition module circuit diagram of aboveground instrument subsystem.
Fig. 9 A, Fig. 9 B are the data acquisition program flow charts of aboveground instrument subsystem.
Figure 10 is the depth data capture program flow chart of aboveground instrument subsystem
Figure 11 is the power module circuitry figure of aboveground instrument subsystem.
Figure 12 is the display module circuit diagram of aboveground instrument subsystem.
Figure 13 is a degree of depth instrument subsystem principle schematic of the present invention.
Figure 14 is transmission cable of the present invention and winch subsystem principle schematic.
Figure 15 is positioning rope of the present invention and winch subsystem principle schematic.
Present invention is described below in conjunction with accompanying drawing:
The specific embodiment
Referring to Fig. 1, ultrasonic logging instrument of the present invention, it mainly is made up of down-hole instrument subsystem 100, aboveground instrument subsystem 300, degree of depth instrument subsystem 700, transmission cable and winch subsystem 600, positioning rope and winch subsystem 800, oscillograph subsystem 400, computer subsystem 500.Below each subsystem is described:
1, down-hole instrument subsystem
Referring to Fig. 2, Fig. 2 A, but the kernel of down-hole instrument subsystem is the instrument part that is enclosed in the airtight body, and under normal circumstances available four feets 101 of this instrument part stand on the ground; The 102nd, be the fender bracket that the protection probe adds, 104 is four root posts, and on the stuck-at-08, ultrasonic probe 106 is four, and 103,105 and four columns 104 in chassis that ultrasonic probe 106 is installed are fixed together, and probe is fixed on the chassis by annular snap 107; Instrument shell 110 is that external diameter is the cylindrical of 90mm, and the bottom is by lower bottom cover 108 sealings (helicitic texture and fixing dead), and the upper end links to each other with 113 by screw, to finish whole sealing; There is two-stage fluting 114 this junction, in order to lay sealing ring 115 on facade; The device 112 that circuit board 200 and fixing circuit board are arranged in the tube; The connection termination 116 of probe is fixed on the installation place, termination 118 (having four) that has aperture by screw, and sealing ring 117 is arranged between 116 and 118; Seven core cable 121 is fixed together by encapsulant 120 and instrument top 122, and seven lines connect together by combination hub and circuit board 200; Load-bearing is hung the wire armoring layer that handle 119 is used to hang down-hole instrument and seven core cable and is fixed together.
Down-hole instrument subsystem 100 comprises circuit board 200, in conjunction with referring to Fig. 3.Circuit board 200 comprises ultrasonic signal 201, ultrasonic probe 202, input module 210, driver module 220, filtration module 230 again, amplifies formations such as adjustment module 240, multichannel multistage analog switch 203, control signal 204, address signal 205, level translation module 250, down-hole microprocessor module 260, signal transmission module 270, downhole system plate power module 280, emission power module 290, cable socket 207.
2, aboveground instrument subsystem
Referring to Fig. 4 A, 4B, aboveground instrument subsystem 300 front panels select knob 303, gain-adjusted knob 304, amplitude discrimination adjusting knob 305, Interference Control knob 306, voltage display list 307, depth displays 308, degree of depth reset button 309 to constitute by power switch 301, probe emission voltage knob 302, probe.Aboveground instrument subsystem 300 rear boards are by down-hole instrument cable socket 311, degree of depth instrument cable socket 312, computer interface socket 313,220V AC Power supply socket 314, fuse base 315, oscillograph external trigger pulse 316, to the input of oscillograph four-way 317a, 317b, 317c, 317d.
The power supply of power switch 301 control whole instrument, probe emission voltage knob 302 are to select to be added in voltage on the probe according to actual conditions, voltage range is+and 12V～+ 250V, magnitude of voltage shows on voltmeter 307 simultaneously; It is four tunnel four sections switches that probe is selected knob 303, in order to select some in four probes, selected certain probe, can connect four road signals simultaneously again, be respectively ultrasonic signal, amplitude discrimination signal, dried control signal and the range finding square-wave signal after the gain, these signals can be respectively by gain-adjusted knob 304, amplitude discrimination adjusting knob 305,306 controls of Interference Control knob, and can deliver to the oscillographic input of four passages 317a, 317b respectively, 317c, 317d are shown that the waveform of demonstration provides real-time foundation for adjusting simultaneously.Each probe passage all has been equipped with identical adjusting knob, is separate between each passage.The signal that degree of depth instrument is sent here can send computer further processes and displays after depth data collection plate acquisition process on the one hand, shows that by depth displays 303 degree of depth reset button 309 can be when needed with the depth data zero clearing on the plate in front simultaneously.
Ultrasonic signal processing module circuit 320 can be by ultrasonic signal conversion module 322, multiway analog switch 323, gain adjustment module 324, amplitude discrimination adjustment module 325, do control adjustment module 326, range finding square wave module 327, multiway analog switch 328 etc. constitute, in conjunction with referring to Fig. 5.The ultrasonic signal 321 feed-in ultrasonic signal conversion modules of sending here by cable by down-hole instrument 100 322, this module is made up of high speed amplifier and corresponding resistance-capacitance network, finish the current mode signal is changed into the voltage-type signal, the different chronologically signals that contain four road probes respectively of the signal here, this signal is delivered to " one selects four " analog switch 328; Afterwards, analog switch is selected wherein one road ultrasonic signal chronologically under the effect of switch controlling signal, delivers to four tunnel treatment circuits independently mutually respectively.With the first via is example, and it comprises gain adjustment module 323, and ultrasonic signal is amplified to required amplitude, finishes Gain Adjustable by the circuit that amplifier etc. constitutes; Amplitude discrimination adjustment module 325 constitutes Schmidt trigger by digital circuit, and this trigger has characteristics such as the strong and adjustable threshold value of antijamming capability, is the square wave that the sine wave that will satisfy the threshold value requirement becomes saturated output.
Ultrasonic signal processing module circuit 320 comprises does control adjustment module 326, it is made of digital trigger, be divided into two-stage and interlock, the square-wave signal width of first order output is to set (35ms in advance, promptly less than the work period 40ms of a probe), second level square width is adjustable, regulate time range and be surpass the envelope that transmits decay to a certain degree the moment and less than moment of the echo first time; The speed of the envelope that transmits decay is mainly relevant by the performance of probe, and is also relevant with the residing medium of probe; And for the first time the echo time mainly arrive the distance dependent of popping one's head in the institute object of surveying.The effect of doing control adjustment module 326 is exactly after making the Mintrop wave circuits for triggering that transmit, all pulses before the echo and interference for the first time all can not make circuit trigger again, the Mintrop wave of echo just can make circuit trigger again up to the first time, thus guarantee to measure accurately, in conjunction with referring to Fig. 6 A oscillogram.
Range finding square wave module that ultrasonic signal processing module circuit 320 comprises 327 is made of JK flip-flop, triode etc., export a low level square-wave signal, the width of square wave is exactly that the Mintrop wave that transmits arrives the width between the echo Mintrop wave for the first time, the time that on behalf of ultrasonic wave, this width propagate back and forth in medium, the distance of promptly corresponding two times of the boreholes wall of popping one's head in.
Ultrasonic signal processing module circuit 320, ultrasonic signal sign_IN1 that cable is transmitted and sign_IN2 are after 322 conversion and analog switch are selected, send into gain adjustment module 324, amplitude discrimination adjustment module 325, do control adjustment module 326, and they are respectively by the gain-adjusted knob 204 on aboveground instrument 300 front panels, amplitude discrimination adjusting knob 205, dried control adjusting knob 206 controls.The signal waveform in each stage of a certain probe can show on oscillograph simultaneously.In addition, independently the final range finding square-wave signal of four road probes synthesizes one road clock signal by analog switch 328 again separately, is transferred to data acquisition and communication module 340.
Data acquisition and communication module 340 comprise four road synchronization pulse 341 (SYN1, SYN2, SYN3, SYN4), and the address signal 342 of control analog switch (A0, A1), range finding square-wave signal input 343 (WAVE), latch 345, phase inverter 346a, 346b, microprocessor 347 (CPU), communicating circuit 348, and just anti-phase depth signal 344 (RXD, TXD), the communication signal 349 of RS232 standard (232TX, 232RX).
Two timers of CPU347 will finish regularly 40ms, regularly survey pulsewidth, make the task of Baud rate generator, and T1 is operated in mode 2 as Baud rate generator like this, the baud rate of generation 9600bps; T0 is operated in mode 3, is divided into two timers and comes usefulness, and TL0 regularly surveys pulsewidth, and TH0 is 40ms regularly.Carry out initialization during beginning, point to the data buffer in orientation 1 afterwards; Send out the SYN1 signal, the address is 00, gating 1 passage; Timer TH0 begins 40ms regularly, judges the distance signal of timing and detection orientation 1, if there is not the then data buffer zero clearing in orientation 1 of signal, has signal then to point to the data buffer in orientation 2; Send out the SYN2 signal, the address is 01, gating 2 passages; Timer TH0 restarts 40ms regularly, repeats above process and finishes up to four processes.Close timer this moment, do not allow to receive, and sends data to PC and carry out the data processing.
Another characteristics of CPU347 work are in the 3rd time period, also will finish reading of depth data; After the 4th time period finishes, carry out the transmission of data, the hole diameter data in depth data and four orientation are sent to PC, carry out high level and handle.Distance measuring signal becomes two signals through handling, and one is inversion signal, and another is an in-phase signal, delivers to respectively on the external interrupt X0 and X1 of microprocessor, and two external interrupt are arranged to the edge triggering mode.To detect the low level time of distance measuring signal here.When the trailing edge arrival, external interrupt 1 is interrupted, and the interruption of opening X0 allows, and T0 begins regularly.When low level finishes, when rising edge arrived, external interrupt 0 was interrupted, and stopped regularly, read count value and preserved in the corresponding buffer, and this count value is exactly the ultrasonic propagation time in well.
Data acquisition and communication module 340 total courses of work are: CPU347 produce chronologically synchronization pulse 341 (SYN1, SYN2, SYN3, SYN4), and the address signal 342 of control analog switch (A0, A1), these signals are sent in the latch 345; Send into INT0 and the INT1 end of CPU347 after by phase inverter 346a and 346b shaping from the range finding square-wave signal 343 of ultrasonic signal processing module circuit 320; In the 3rd time period, (RXD TXD), and after the 4th time period finishes, is sent to computer subsystem (PC) to the hole diameter data in depth data and four orientation to sampling depth data-signal 344 simultaneously.
Depth data acquisition module 360 comprises CPU371, it is provided with two counters of rotating and two snubbers, come a square wave, judge current turning to, turn to counter to add 1 accordingly, write 36 pulses all over, just to 1 centimetre, turn to snubber to add 1 accordingly, these work are all finished in the T0 interrupt service routine; In main program, the difference of the detection rotating snubber that does not stop is if be zero, illustrate that the degree of depth does not change, if non-vanishing, has illustrated change in depth, will calculate the current degree of depth and on LED, show, also want the record of depth value in the refresh buffer 368 simultaneously; When data acquisition and communication module 340 when it wants depth value, after promptly receiving 340 synchronizing signal, depth data acquisition module 360 will send to the depth value of current section in 340 the processor by serial port 364, send to host computer by it together with 4 hole diameter values again and handle; In addition, reset signal 361 (CLR) can make the depth data zero clearing where necessary, and communication and zero clearing are all externally finished in the interrupt service routine.
3, oscillograph subsystem
Oscillograph subsystem 400, this oscillograph can adopt digitized four-way oscillograph, easy and simple to handle, have many outstanding functions, reach 100MHz as bandwidth, sampling rate reaches 1.0GS/s, have multiple triggering mode, can carry out the FFT computing, automatically setup menu, the waveform of each passage shows with different colors, comes into plain view; Can select the automatic setting control function of waveform, automatically monitoring is sinusoidal wave, square wave and vision signal, and option is set automatically with what graphic interface showed these signals; The user can select selection further is set, and comprises the rise and fall edge, video line field and FFT etc., and dissimilar according to signal show the automatic measurements of 4 kinds of parameters automatically; 11 kinds are provided with simplification automatically and quicken measuring process, reduce human error, comprising: minimum value, maximum value, rise time, fall time ,+pulse width ,-pulse width, cycle, average, cycle virtual value, peak-to-peak value; The triggering frequency is read, and is derived from moving activation the (except when video triggers) by triggering, and the frequency (comprising the external trigger source) that the user can the measurement triggering signal need not to re-use a passage and does output; The external trigger input that provides front panel to be different from input channel, and can show triggering signal, comprise the external trigger signal; Can be by traditional simulation style control button of being familiar with, plate is finished most of common function in front, as automatic setting, helps, and single is caught, and prints sweep speed etc.; Menu can be selected 10 kinds of operation interfaces with demonstration: English, French, German, Italian, Portuguese, Russian, simplified form of Chinese Character, Chinese-traditional, Korean, Japanese; Can carry out that single is caught, peak value detects, catch and observe the high-frequency signal composition, freeze or stop waveform, storage accesses waveform, quick storage setting and accesses numerous functions such as carrying out retest, for regulating instrument in real time, showing to observe waveform and accurately measure and lay the foundation.
4, computer subsystem
Above-mentioned software can comprise that communication receives data subprogram, log data display subroutine such as the well logging initialization subroutine, subprogram opens file, filtering and drawing display subroutine, shaft section and useful area arithmetic subroutine, curve fitting algorithm subprogram etc.; Functions such as technical datas such as borehole wall inclination, hole diameter, useful area, eccentricity and data storage, the inquiry of historical data, printing can correspondingly be provided.
5, degree of depth instrument subsystem
Referring to Figure 13 and in conjunction with Fig. 8 and Figure 10, degree of depth instrument subsystem 700, the inscape of this subsystem is: the photoelectric code disk 702 that pulley 701 links to each other with pulley, base support 703, treatment circuit 704, transport module 705, transmission cable 706 etc.Seven core armored cables (transmission cable) of lifting down-hole instrument subsystem are through pulley 701, instrument transfer or lifting process in drive the pulley rotation, the photoelectric code disk 702 that links together by gear and pulley 701 also and then rotates; This photoelectric code disk whenever revolves turn around (week) exportable 3600 pulses at pulley, gives transport module 705 after the treated circuit 704 of this pulse signal is handled; In the burst process process,, can produce different pulses according to the difference of pulley rotating; This pulse signal is sent into transport module 705 backs and is being sent to aboveground instrument depth data acquisition module 360 by transmission cable 706.
Synchronizing signal 362 (SYN) is sent into the INT0 of microprocessor 371 through shaping circuit 365b, and this signal guarantees that the duty of all circuit carries out synchronously, and this signal is from the CPU347 of data acquisition and communication module 340; Encoder output two-way depth signal 363 (DEEP1 on the degree of depth instrument, DEEP2), this two paths of signals or homophase or anti-phase, the decision that turns to by wheel, behind shaping circuit 365c and 365d, driving triode 366a and 366b, trigger 367 and shaping circuit 369, output is the square-wave signal after the shaping, and another output is the rotating signal, deliver to T0, the T1 end of CPU371 respectively, be used for counting and judgement.
Depth data acquisition module 360 comprises CPU371, it is provided with two counters of rotating and two snubbers, come a square wave, judge current turning to, turn to counter to add 1 accordingly, write 36 pulses all over, just to 1 centimetre, turn to snubber to add 1 accordingly, these work are all finished in the T0 interrupt service routine; In main program, the difference of the detection rotating snubber that does not stop is if be zero, illustrate that the degree of depth does not change, if non-vanishing, has illustrated change in depth, will calculate the current degree of depth and on LED, show, also want the record of depth value in the refresh buffer 368 simultaneously; When data acquisition and communication module 340 when it wants depth value, after promptly receiving 340 synchronizing signal, depth data acquisition module 360 will send to the depth value of current section in 340 the processor by serial port 364, send to host computer by it together with 4 hole diameter values again and handle; In addition, reset signal 361 (CLR) can make the depth data zero clearing where necessary, and communication and zero clearing are all externally finished in the interrupt service routine.
6, transmission cable and winch subsystem
In conjunction with referring to Figure 14, transmission cable and winch subsystem 600, this subsystem is made of critical pieces such as browpiece and fixed pulley 601, armored cable 602, reel 603, slip ring and connector socket 604, control device 605, motor 606, base supports 607.Cable 602 is seven cores, armor adopts double-deck stone dead wire braiding to form, between steel wire and the cable insulating layer is arranged, the external diameter of armored cable is 11mm, long 1000m, but 2.5 tons of load-bearing, the signal that transmits in the seven core cable is respectively: emission voltage (+12V ~+250V), down-hole instrument circuit supply voltage (+20V), simulation ground, digitally, give the down-hole instrument synchronizing signal, pass to the ultrasonic signal (accounting for two-way) of aboveground instrument; Reel 603 and motor 606 all dispose on request; Slip ring and connector socket 604 are that seven cores are special, have wear-resisting, waterproof, anticorrosive aging, robust characteristics; Control device 605 is used for controlling whole winch, has manual and automatic dual mode, under automated manner, but program setting just change, reverse, can set rotating speed, i.e. the instrument speed that rises or descend etc.
7, positioning rope and winch subsystem
Referring to Figure 15 and in conjunction with Fig. 2 and Fig. 2 B, positioning rope and winch subsystem 800, it is made of two winches.Respectively by browpiece and fixed pulley 801, wire rope 802, reel 803, weight 804, control device 805, motor 806, base support 807 and horizontal positioning device 109 (on), 111 critical pieces such as (descending) constitute.Wire rope 802 external diameters are 11mm, long 1000m, but 3 tons of load-bearing, and reel 803 and motor 806 all dispose on request; Control device 805 is used for controlling whole winch, manually control.Positioner 109 is identical with 111 structure, and they are separate, are separately positioned on the upper and lower of housing, can rotate around housing 110 respectively, so that instrument is positioned at required orientation; Adopt the structure of putting up and down can avoid the rotation and the swing of down-hole instrument simultaneously.The structure of positioner is as follows, is example (Fig. 2 C) with 109: but this device is made of the steel cable pilot hole 109c and the lock screw 109d of horizontal extension bar 109a, annular ring 109b folding.Unclamp 109d so that adjust the orientation of instrument, after mixing up with its locking; But 109c is folding, the guiding steel cable can be put into or is taken out when opening, and steel cable is put into after-opening and closed, and fixes with screw.Weight 804 is heavy 200 kilograms, fastens the end at wire rope, and they transfer in the well in advance; Two fixed pulley 801a close the distance between the 801b, that is the distance between two wire rope is the length between horizontal direction extension rod on the instrument of down-hole (109 or 111) two locating holes; Backstay adopts two covers up and down, thereby guarantees down-hole instrument position stability, can not occur in the measuring process rotating and dancing.
The quantity that down-hole instrument subsystem is provided with ultrasonic probe among the present invention also can be 1,2,3,5,6 or 8 or the like.
Each subsystem also can have many conspicuous variation patterns among the present invention under the guide of above-mentioned explanation, under the condition of essence of the present invention, all should be protection domain indication of the present invention.
Claims (12)
1, a kind of ultrasonic logging instrument comprises:
(i) be used for launching ultrasonic pulse signal, receive borehole wall reflected ultrasonic and also convert thereof into electric impulse signal, and amplify to received signal, the down-hole instrument subsystem of filtering and conversion process;
(ii) be used for to down-hole instrument subsystem provides suitable coupling electric energy, the generation of lock-out pulse, the transmission signal of instrument subsystem under the received well amplifies and conversion process transmitting signal, and the aboveground instrument subsystem of other related data collection;
(iii) be used for data are carried out the computer subsystem of synthetical collection and processing, connect by data circuit between computer subsystem and the aboveground instrument subsystem;
(iv) be used for the degree of depth instrument subsystem that instrument is transferred the degree of depth under the measuring well, above-mentioned aboveground instrument subsystem comprises that also data acquisition process and the depth value to degree of depth instrument transmission signal shows;
(v) be used between down-hole instrument subsystem and aboveground instrument subsystem, carrying out the signal transmission, and promote and transfer the transmission cable and the winch subsystem of down-hole instrument subsystem;
(vi) be used for determining the positioning rope and the winch subsystem in orientation, down-hole for down-hole instrument subsystem; And
(vii) be used for showing the oscillograph subsystem of observing real-time waveform; It is characterized in that:
Described down-hole instrument subsystem comprises the ultrasonic probe of a closed shell and selected quantity, and ultrasonic probe is used to transmit and receive pulse ultrasonic wave; Be provided with circuit part in the closed shell, circuit part can comprise Drive Module, input module, filter module, amplification adjustment module, switch selection module, level translation module, down-hole microprocessor module, signal transmission module, downhole system power module; Above-mentioned aboveground instrument subsystem can comprise complete machine power module, probe power supply module, depth data collection and processing circuit module, ultrasonic receiving conversion and processing circuit module, data acquisition and communication circuit module, motherboard circuit module, display circuit module; Above-mentioned degree of depth instrument subsystem, comprise the photoelectric code disk that pulley links to each other with pulley, the transmission cable of hanging down-hole instrument subsystem closed shell is on the pulley of degree of depth instrument subsystem, and drive pulley rotation, the pulley of rotation drives photoelectric code disk, photoelectric code disk produces two-way homophase or anti-phase square-wave signal when wheel turns, square-wave signal is connected to the depth data collection and the treatment circuit of aboveground instrument subsystem by cable; Above-mentioned transmission cable and cable reel subsystem, the connection of transmission cable one end is also hung down-hole instrument subsystem, the other end connects aboveground instrument subsystem, the above ground portion of transmission cable is wound on the cable reel, and transmission cable can be the armouring seven core cable, and seven cores of cable are corresponding power, power supply ground, data signal ground, synchronizing signal, emission voltage, simulation ultrasonic signal respectively, the armature of cable layer is that two-layer finer wire constitutes, cable reel is equipped with seven core slip rings, can manually or automatically control; Above-mentioned positioning rope and winch subsystem, positioning rope is two flexible steel wires, the lower end hangs weight, article two, keep at a certain distance away between the wire rope, transfer and rolling by pulley by winch, article two, wirerope pilot hole that passes the up and down a pair of horizontal extension bar that is positioned at the left side on the instrument subsystem closure casing of down-hole wherein, another passes the pilot hole of a pair of horizontal extension bar up and down that is positioned at the right side; Above-mentioned oscillograph subsystem, this oscillograph has four autonomous channels and an external trigger passage, signal behind ultrasonic signal after four passages connect certain probe that aboveground instrument subsystem sends here respectively and amplify, the amplitude discrimination, do control signal, range finding square-wave signal, each probe is then switched by the multichannel Multi-band switch; Online or the off-line of aforementioned calculation loom system provides borehole wall inclination, hole diameter, useful area, eccentricity technical data and data storage, the inquiry of historical data operation.
2, ultrasonic logging instrument according to claim 1 is characterized in that: described aboveground instrument subsystem also comprises adjustable gain and adjustable interference control.
3, ultrasonic logging instrument according to claim 1, it is characterized in that: the ultrasonic probe of described down-hole instrument subsystem is 4, all be divided into four orientation to 360 °, each ultrasonic probe is arranged on one of them orientation, and the timesharing of 4 probes transmit and receive pulse ultrasonic wave.
4, ultrasonic logging instrument according to claim 3, it is characterized in that: the Drive Module of described down-hole instrument subsystem is to select under the control of module in control signal and switch, the trigger voltage that above-mentioned aboveground instrument subsystem is sent here is added on the corresponding ultrasonic probe, makes probe vibration and produces ultrasonic wave; Above-mentioned input module is accepted echo-signal, and does certain preliminary treatment; The circuit of filter module is made up of a low pass filter, a high-pass filter and active amplifier section, can select required CF; Above-mentioned amplification adjustment module adopts the capacitance-resistance feedback network that above-mentioned CF is amplified and handles; Above-mentioned switch selects module to select for use multichannel four to select an analog switching circuit, and gating under the control of control impuls and address signal, the signal of gating comprise probe control signal and ultrasonic signal; Above-mentioned level translation module is that the signal that the down-hole microprocessor is sent here is carried out shaping, conversion, in order to the analog switching circuit in the gauge tap selection module; Above-mentioned down-hole microprocessor module mainly is that the synchronizing signal that aboveground instrument subsystem is sent here is handled again, and sends clock signal and address signal, and the work of down-hole instrument subsystem is coordinated in control; Above-mentioned signal transmission module is that the ultrasonic signal with gating amplifies, is transformed into and has the strong signal of antijamming capability and transmittability and pass to aboveground instrument subsystem by transmission cable; The downhole system power module is responsible for giving whole down-hole instrument circuit that required power supply power supply is provided.
5, ultrasonic logging instrument according to claim 4, it is characterized in that: the synchronizing signal of instrument subsystem on the down-hole microprocessor module received well in the instrument subsystem of described down-hole, provide the channel address of first ultrasonic transducer, send control impuls, gauge tap is selected first passage of analog switching circuit gating in the module, and Guan Lian first transducer is just started working with it; Then, provide next ultrasonic transducer channel address, send out control impuls, next passage of gating and ultrasonic transducer every 40ms; Control above-mentioned 4 ultrasonic transducer work successively, finish a work period; The downhole system power module sends aboveground instrument subsystem here+20V voltage voltage regulation filtering after, output+12V ,+6V ,-6V supplies with other analog module except that down-hole microprocessor module and level translation module respectively, as supply voltage and reference voltage, general+5V voltage is given down-hole microprocessor module and level translation module as operating voltage; The synchronizing signal of instrument subsystem on the down-hole microprocessor module received well in the instrument subsystem of above-mentioned down-hole, down-hole microprocessor module output control and address signal to level translation module are carried out waveform shaping and conversion, be input to multichannel four afterwards again and select an analog switching circuit, the triggering signal of analog switching circuit gating is added on the ultrasonic probe through Drive Module, the switch of control probe piezo-electric crystal; Ultrasonic signal on the probe is sent into input module, is input to filter module after its preliminary treatment, arrives afterwards again and amplifies adjustment module; Four road ultrasonic signals are all sent into analog switching circuit and are carried out gating after the processing of four groups of separate circuit, the signal of gating is delivered to aboveground instrument subsystem part by transmission cable after sending into the signal transmission module changing and shaping again.
6, ultrasonic logging instrument according to claim 5 is characterized in that: the down-hole microprocessor module in the instrument subsystem of described down-hole can send control impuls again after sending channel address 2ms.
7, ultrasonic logging instrument according to claim 1 is characterized in that: the complete machine power module of described aboveground instrument subsystem adopts the switching power supply of alternating current 220V input, working power is provided for aboveground instrument and provides+the 20V direct current to down-hole instrument subsystem; Probe power supply module adopts 220v to exchange input, the transformer that exchanges output more, and carrying out rectifying and wave-filtering after Multi-band switch is selected is the ultrasonic probe power supply, voltage range be direct current+12V～+ 250V; Above-mentioned depth data collection and processing circuit module mainly contain input interface, handle reshaper, microprocessor, the photoelectric code disk of degree of depth instrument subsystem produces two-way or homophase or anti-phase 3600/circle square-wave signal when wheel turns, handle reshaper this two paths of signals is carried out the shaping processing, output is the square-wave signal after the shaping, another output is the rotating signal, deliver to the T0 and the T1 of microprocessor respectively, be used for counting and judgement, microprocessor is provided with two counters of rotating and two snubbers, come a square wave, judge current turning to, after microprocessor received the synchronizing signal that collection plate sends, this module will send to the depth value of current section in the processor of data acquisition and telecommunication circuit by serial port; Display circuit module has the drive circuit of triggering and digital display tube, in order to show the depth value of probe position in the well; Above-mentioned ultrasonic receiving conversion and processing circuit module comprise ultrasonic signal conversion amplifying circuit, the analog switch gating circuit, four road gain adjusting circuits, four road amplitude discrimination circuits for triggering, four road dried control circuits, range finding square-wave signal circuit, ultrasonic signal conversion amplifying circuit adopts high speed operation amplifier, the ultrasonic signal that the down-hole instrument is sent here carries out the conversion amplification, obtain follow-up required signal, the analog switch gating circuit is under the effect of control signal and address signal, four road ultrasonic signals of transmission are chronologically taken out respectively, give four tunnel separate gains, amplitude discrimination, do control and range-measuring circuit, then again they being combined into one road signal chronologically transmits backward, gain adjusting circuit is made of high speed operation amplifier and corresponding network, ultrasonic signal is amplified, the amplitude discrimination circuits for triggering constitute Schmidt trigger by digital circuit, its activation threshold value can be adjusted, dried control circuit is made of the two-stage trigger, range finding square-wave signal circuit is the output according to trigger, drive by drive circuit again, obtain the square wave distance measuring signal of enough carrying load abilities; Above-mentioned data acquisition and communication circuit module mainly are made of the communication interface circuit of microprocessor, coder, trigger, RS232 standard; Connect each functional module and wiring board by above-mentioned motherboard circuit module.
8, ultrasonic logging instrument according to claim 7, it is characterized in that: the microprocessor of described data acquisition and communication circuit module, two timer can be finished regularly 40ms, pulsewidth, double as Baud rate generator are surveyed in timing, T1 is operated in mode 2 as Baud rate generator, produce the baud rate of 9600bps, T0 is operated in mode 3, as two timers, TL0 regularly surveys pulsewidth, and TH0 is 40ms regularly; Above-mentioned distance measuring signal becomes two signals through handling, one is inversion signal, another is an in-phase signal, deliver to respectively on the external interrupt X0 and X1 of microprocessor, two external interrupt are arranged to the edge triggering mode, when range finding square-wave signal trailing edge arrived, external interrupt 1 was interrupted, and the interruption of opening X0 allows, TH0 begins regularly, when the low level end, when rising edge arrived, external interrupt 0 was interrupted, stop regularly, read count value and also preserve in the corresponding buffer, this count value is exactly the propagation time of ultrasonic wave in pit shaft, and survey data is sent to PC through communication interface and further handles.
9, ultrasonic logging instrument according to claim 8, it is characterized in that: described data acquisition and communication circuit module also have following technical approach, with 160ms is a work period, be divided into 4 time periods, each time period is 40ms, provides the address in each time period, sends out synchronizing signal, measures pulse width, prepares measuring operation next time; This module is carried out reading of depth data the 3rd time period; This module is carried out transfer of data when the 4th time period finishes.
10, ultrasonic logging instrument according to claim 7 is characterized in that: described motherboard circuit module is provided with ultrasonic receiving conversion and treatment circuit plate slot, depth data collection and treatment circuit plate slot, data acquisition and communicating circuit plate slot, transmission cable socket, degree of depth instrument cable socket, serial communication cable socket, electrical socket; Board in circuit board slot adopts the accurate STD bus standard of 48 footnotes.
11, ultrasonic logging instrument according to claim 1 is characterized in that: described degree of depth instrument subsystem, the transmission cable of hanging down-hole instrument subsystem closed shell are on the pulley of degree of depth instrument, and the pulley size is passed by one meter for the pulley transmission cable that rotates a circle; Above-mentioned photoelectric code disk produces the square-wave signal of 3600 of two-way/circle when wheel turns.
12, ultrasonic logging instrument according to claim 1, it is characterized in that: described positioning rope and winch subsystem can be made of two positioning ropes and winch subsystem, each positioning rope and winch subsystem are by winch, browpiece and a fixed pulley, wire rope, reel, weight, motor, base support, and be positioned at two wire rope positioners on the instrument subsystem closed shell of down-hole, be separately positioned on the upper and lower of housing, can rotate around housing respectively; Each wire rope positioner can have horizontal extension bar, annular ring, lock screw and be positioned at the level frame elongation does the steel cable pilot hole at two ends; Article two, the distance between the wire rope is a length between every horizontal extension bar two ends pilot hole.
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| CNB2004100361260A CN100348834C (en) | 2004-10-21 | 2004-10-21 | Ultrasonic well logging instrument |
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| CNB2004100361260A CN100348834C (en) | 2004-10-21 | 2004-10-21 | Ultrasonic well logging instrument |
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