CN201190565Y - High resolution digitisation acoustic logging device - Google Patents
High resolution digitisation acoustic logging device Download PDFInfo
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- CN201190565Y CN201190565Y CNU2008200742707U CN200820074270U CN201190565Y CN 201190565 Y CN201190565 Y CN 201190565Y CN U2008200742707 U CNU2008200742707 U CN U2008200742707U CN 200820074270 U CN200820074270 U CN 200820074270U CN 201190565 Y CN201190565 Y CN 201190565Y
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Abstract
The utility model relates to a digitalizing acoustic wave logging device with high resolving power, comprising a control unit, a receiving probe unit, an emission probe, a preposed amplifying unit, a CAN bus interface circuit and a sound wave logic triggering unit, wherein, the preposed amplifying unit is connected with the control unit for amplifying the signal obtained from the receiving probe unit and sending the amplified signal to the control unit; the CAN bus interface circuit is connected with the control unit through a CAN bus, transferring the ground command to the control unit and receiving the information of the control unit; the sound wave logic triggering unit is connected with the control unit, transmitting the signal emitted by the control unit to the emission probe. The control unit adopts a high-speed digital signal processor, and comprises comprising a CAN bus transceiver U1 and an EEPROM memory U3. The receiving probe unit comprises a first receiving probe, a second receiving probe, a third receiving probe and a fourth receiving probe connected with the preposed amplifying unit respectively. The utility model eliminates attenuation and interference to the sound wave signal by a well logging cable, improves the measuring precision, reflects the stratum information accurately, and the received signal is realer so as to improve the reliability of the system.
Description
Technical field
The utility model relates to a kind of acoustic logging instrument, particularly relates to a kind of high-resolution digital acoustical well-logging devices of realizing the digitized measurement interval transit time in downhole instrument.
Background technology
Traditional high-resolution acoustic logging instrument function is simple, only after the signal amplification with 4 receiving transducers, is transferred to ground system after power amplifier drives, owing to be subjected to the restriction of cable conductor quantity, can only upload the signal of a receiving transducer at every turn.
After ground logging system receives the signal that the down-hole instrument uploads,, after passing, the degree of depth calculates the time difference again with the Mintrop wave time of advent that the timer mode is measured the per pass signal.4 receiving transducers are spacedly distributed in sonic system, be positioned at the different degree of depth during well logging, and traditional high-resolution acoustic logging instrument can only be uploaded one acoustic signals at every turn, thereby cause the asking for of the time difference can not be corresponding fully with the degree of depth, thereby have measure error.
For making the time of advent of ground system energy measurement Mintrop wave, traditional high-resolution acoustic logging instrument start mark signal that must superpose on the acoustic signals of uploading is so that ask for the Mintrop wave time of advent of 4 road signals from synchronization.Because logging cable is longer, the acoustic signals of uploading is attenuated, and be subjected to the influence (as: power supply that exchanges 180V is disturbed) of the signal of other cable cores transmission, distortion has taken place in the acoustic signals that is sent to ground system, make the Mintrop wave of measuring have error the time of advent, can not correctly reflect formation information.Ground system comes 4 road signals are sorted by identification marking, with corresponding 4 different receiving transducers, when serious interference, may cause ordering chaotic because of the mark identification error, thereby can't ask for the time difference.
Traditional high-resolution acoustic logging instrument can not receive the order of ground system, can't be optimized setting to the running parameter of circuit.Such as, the characteristic of sound wave emissions probe can not be in full accord, adjusts fire pulse width and can make transmitting probe work in optimum state; The characteristic of sound wave receiving transducer also can not be in full accord, for improving receptivity, should adopt different signal receiving circuit gains at different receiving transducers.
In addition, the sound wave receiving transducer is a passive sensor, and output impedance is bigger, because probe is installed in the sonic system, need be connected to the preamplifier of circuit by long line, and the common mode disturbances that therefore arrives preamplifier is bigger.Traditional high-resolution acoustic logging instrument adopts base amplifier as preamplifier, can not eliminate the common mode interference signal of input.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of and directly in downhole instrument acoustic signals is carried out the high-speed digitization collection, and then ask for the high-resolution digital acoustical well-logging devices of interval transit time by software.
The technical scheme that the utility model adopted is: a kind of high-resolution digital acoustical well-logging devices include: control module, receiving transducer unit, transmitting probe; And link to each other with control module and to send into the pre-amplifier unit of control module after will amplifying from the signal that the receiving transducer unit obtains; Link to each other with control module by the CAN bus and to transmit the ground order and to receive the CAN bus interface circuit of control module information to control module; The signal that control module is sent of linking to each other with control module is sent to the sound wave logical triggering unit of transmitting probe.
Described control module adopts high speed digital signal processor, and provides power supply by power supply chip U10.
Described control module is provided with CAN bus transceiver U1.
Also be provided with eeprom memory U3 on the described control module.
Described receiving transducer unit includes the 1st receiving transducer, the 2nd receiving transducer, the 3rd receiving transducer and the 4th receiving transducer that links to each other with pre-amplifier unit respectively.
Described pre-amplifier unit includes: RC high-pass filtering circuit, amplifying circuit, the low-pass filter circuit of Xiang Lianing, and the reference voltage generating circuit that reference voltage is provided to amplifying circuit successively.
Described sound wave logical triggering unit includes sound wave logic high-voltage pulse power source circuit and low-voltage power circuit.
High-resolution digital acoustical well-logging devices of the present utility model have directly been realized digitlization in downhole instrument, obtain following effect: 1) eliminated decay and the interference of logging cable to acoustic signals, thereby improved certainty of measurement; 2) can adjust the running parameter of downhole instrument by ground system, make it work in optimum state, it is more accurate to measure; 3) can gather 4 receiving transducer signals simultaneously, it is strict corresponding to have guaranteed that the degree of depth is passed, thereby correctly reflects formation information; 4) owing to adopted instrument amplifier, eliminated the receiving transducer signal, made that the signal that receives is truer because of the common mode disturbances that long line transmission produces as the signal receiving preamplifier; 5) because of having adopted high performance digital signal processor, simplify circuit design, improved the reliability of system.
Description of drawings
Fig. 1 is an integrated circuit theory diagram of the present utility model;
Fig. 2 is the circuit theory diagrams of control module of the present utility model and interface thereof;
Fig. 3 is the circuit theory diagrams of pre-amplifier unit of the present utility model;
Fig. 4 is low-voltage power circuit of the present utility model and sound wave logic high-voltage pulse power source circuit theory diagrams.
Wherein:
1: control module 2: pre-amplifier unit
3: sound wave logical triggering unit 4: transmitting probe
5: receiving transducer unit 6:CAN bus interface circuit
The specific embodiment
Provide specific embodiment below in conjunction with accompanying drawing, further specify the utility model and how to realize.
As shown in Figure 1, high-resolution digital acoustical well-logging devices of the present utility model include: control module 1, receiving transducer unit 5, transmitting probe 4; And link to each other with control module 1 and to send into the pre-amplifier unit 2 of control module 1 after will amplifying from the signal that receiving transducer unit 5 obtains; Link to each other with control module 1 by the CAN bus and to transmit the ground order and to receive the CAN bus interface circuit 6 of control module 1 information to control module 1; The signal that control module 1 is sent of linking to each other with control module 1 is sent to the sound wave logical triggering unit 3 of transmitting probe 4.
Described receiving transducer unit 5 is the acoustic signals that receive to come from earth-layer propagation, and being converted into the signal of telecommunication, it includes the 1st receiving transducer the 51, the 2nd receiving transducer the 52, the 3rd receiving transducer 53 and the 4th receiving transducer 54 that links to each other with pre-amplifier unit 2 respectively.
Sound wave emissions probe 4 is to stratum emission acoustic signals.
As shown in Figure 2, described control module 1 adopts the TMS320F2808 high speed digital signal processor DSP of TI, is 32 bit CPUs, and nearly all instruction all is an one-cycle instruction, and the instruction cycle is up to 100Mbps.The I/O port voltage of high speed digital signal processor DSP is 3.3V, and core voltage is 1.8V, provides power supply by model for the power supply chip U10 of TPS767318.
High speed digital signal processor DSP possesses 16 channel modulus converters, and the sampling period is the fastest to be 160nS.Processor is the circulating sampling of 1uS to the 4 road sound wave signal cycles of carrying out, and sampled value is stored in zone separately.After collection finishes, sampled result is carried out calculating this degree of depth to deserved interval transit time after the degree of depth is passed, and be uploaded to CAN bus interface circuit 6.
Described control module 1 is provided with CAN bus transceiver U1, be integrated with the CAN module in the inside of high speed digital signal processor DSP, can be the CAN bus transceiver U1 of SN65HVD233D by a model as shown in Figure 2, be articulated on the downhole toolbus easily.
Also be provided with eeprom memory U3 on the described control module 1.To adjust signal gain in order making, to adjust threshold level, parameter such as fire pulse width is set can long preservation, does not lose after the outage, having extended out model on the control module 1 is the eeprom memory of AT25010.High speed digital signal processor DSP receives and adjusts signal gain, adjust threshold level, order such as fire pulse width be set after, can adjust relevant parameter, and adjusted parameter is kept at extends out among the EEPROM, can not lose after the parameter outage guaranteeing.
As shown in Figure 3, described pre-amplifier unit 2 is that the acoustic signals that receiving transducer receives is carried out undistorted amplification, so that DSP carries out high speed acquisition, include: RC high-pass filtering circuit, amplifying circuit, the low-pass filter circuit of Xiang Lianing, and the reference voltage generating circuit that reference voltage is provided to amplifying circuit successively.
The ultra-weak electronic signal that receiving transducer unit 5 produces enters the A/D conversion module of DSP behind amplification and filter circuit.It is that the programmable amplifier U5A of AD8231 amplifies that sensor signal enters model after through a RC high pass network, and the multiplication factor of programmable amplifier U5A can be selected by programming, and multiplication factor is corresponding with the receive path gain of default.After signal amplifies again through obtaining the AD module that sampled signal enters DSP behind the active second-order low-pass filter circuit.Programmable amplifier U5A comprises an instrument amplifier and a single operational amplifier, this operational amplifier has been used in low-pass filter circuit here, as figure U5B.The reference voltage of programmable amplifier U5A is 1.5V, is produced by the U9 that constitutes reference voltage generating circuit, R14, R17, and resistance R 14, R17 are precision resistance.Programmable amplifier U5A can realize 1,2,4,8,16,32,64,128 times of amplification under the control of dsp chip.
The sound wave emissions impulse circuit produces the high-voltage pulse that is used for driving the sound wave emissions transformer.Receive upload well logging information after, DSP can produce a pulse according to the pulse width parameter of default, this pulse obtains driving the high-voltage pulse of emission transformer behind overdrive circuit.Described sound wave logical triggering unit 3, the sound wave logical triggering signal that DSP is produced carries out power amplification, so that drive the acoustic signals transmitting probe.
The course of work of the present utility model is:
Receive the order that ground issues: DSP and receive the ground order that the CAN bus interface circuit is transmitted by the CAN bus.For parameter order is set, DSP finishes corresponding modification and storage operation.
Sound wave logical triggering unit: promote transmitting probe emission acoustic signals by high-voltage driving circuit.
Upload log data: the sampled signal of last one-period, interval transit time and the compensation sound wave time difference are uploaded to the CAN bus interface circuit by the CAN bus.
Finish 4 tunnel sampling: DSP 4 road acoustic signals are carried out the circulating sampling of 1uS, and sampled result is preserved.
Calculate the sampled result that interval transit time and the compensation sound wave time difference: DSP obtain by previous step, calculate the interval transit time and the compensation sound wave time difference, and be stored in corresponding units, the wait next cycle is uploaded.
The above; it only is preferred embodiment of the present utility model; be not that the utility model is done any pro forma restriction; every foundation technical spirit of the present utility model all still belongs to the protection domain of technical solutions of the utility model to any simple modification, equivalent variations and modification that above embodiment did.
Claims (7)
1. high-resolution digital acoustical well-logging devices is characterized in that, include: control module (1), receiving transducer unit (5), transmitting probe (4); And link to each other with control module (1) and to send into the pre-amplifier unit (2) of control module (1) after will amplifying from the signal that receiving transducer unit (5) obtain; Link to each other with control module (1) by the CAN bus and to transmit the ground order and to receive the CAN bus interface circuit (6) of control module (1) information to control module (1); The signal that control module (1) is sent of linking to each other with control module (1) is sent to the sound wave logical triggering unit (3) of transmitting probe (4).
2. high-resolution digital acoustical well-logging devices according to claim 1 is characterized in that, described control module (1) adopts high speed digital signal processor, and provide power supply by power supply chip U10.
3. high-resolution digital acoustical well-logging devices according to claim 1 and 2 is characterized in that, described control module (1) is provided with CAN bus transceiver U1.
4. high-resolution digital acoustical well-logging devices according to claim 1 and 2 is characterized in that, described control module also is provided with eeprom memory U3 on (1).
5. high-resolution digital acoustical well-logging devices according to claim 1, it is characterized in that described receiving transducer unit (5) includes the 1st receiving transducer (51), the 2nd receiving transducer (52), the 3rd receiving transducer (53) and the 4th receiving transducer (54) that links to each other with pre-amplifier unit (2) respectively.
6. high-resolution digital acoustical well-logging devices according to claim 1, it is characterized in that, described pre-amplifier unit (2) includes: RC high-pass filtering circuit, amplifying circuit, the low-pass filter circuit of Xiang Lianing, and the reference voltage generating circuit that reference voltage is provided to amplifying circuit successively.
7. high-resolution digital acoustical well-logging devices according to claim 1 is characterized in that, described sound wave logical triggering unit (3) includes sound wave logic high-voltage pulse power source circuit and low-voltage power circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200742707U CN201190565Y (en) | 2008-04-01 | 2008-04-01 | High resolution digitisation acoustic logging device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200742707U CN201190565Y (en) | 2008-04-01 | 2008-04-01 | High resolution digitisation acoustic logging device |
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| CN201190565Y true CN201190565Y (en) | 2009-02-04 |
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| CNU2008200742707U Expired - Fee Related CN201190565Y (en) | 2008-04-01 | 2008-04-01 | High resolution digitisation acoustic logging device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101691841B (en) * | 2009-10-16 | 2012-11-21 | 中国石油天然气集团公司 | Circuit used for petroleum underground three-dimensional acoustic wave signal receiving sensor array |
| CN102889079A (en) * | 2012-10-16 | 2013-01-23 | 中国电子科技集团公司第二十二研究所 | Acoustic logging transmitting transducer driving system |
| CN103089232A (en) * | 2011-10-27 | 2013-05-08 | 中国石油集团长城钻探工程有限公司 | Methods for detecting logging equipment and correcting consistency |
| CN103256044A (en) * | 2012-12-19 | 2013-08-21 | 电子科技大学 | Sound wave signal processing device while drilling |
| CN112881536A (en) * | 2019-11-29 | 2021-06-01 | 哈尔滨工业大学 | Large-scale high-speed rotation equipment ultrasonic signal high-speed acquisition system based on acquisition and transmission integration |
-
2008
- 2008-04-01 CN CNU2008200742707U patent/CN201190565Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101691841B (en) * | 2009-10-16 | 2012-11-21 | 中国石油天然气集团公司 | Circuit used for petroleum underground three-dimensional acoustic wave signal receiving sensor array |
| CN103089232A (en) * | 2011-10-27 | 2013-05-08 | 中国石油集团长城钻探工程有限公司 | Methods for detecting logging equipment and correcting consistency |
| CN103089232B (en) * | 2011-10-27 | 2016-08-24 | 中国石油集团长城钻探工程有限公司 | The detection of logging equipment and Concordance method |
| CN102889079A (en) * | 2012-10-16 | 2013-01-23 | 中国电子科技集团公司第二十二研究所 | Acoustic logging transmitting transducer driving system |
| CN102889079B (en) * | 2012-10-16 | 2015-02-25 | 中国电子科技集团公司第二十二研究所 | Acoustic logging transmitting transducer driving system |
| CN103256044A (en) * | 2012-12-19 | 2013-08-21 | 电子科技大学 | Sound wave signal processing device while drilling |
| CN103256044B (en) * | 2012-12-19 | 2016-01-06 | 电子科技大学 | A kind of with brill acoustic signals treating apparatus |
| CN112881536A (en) * | 2019-11-29 | 2021-06-01 | 哈尔滨工业大学 | Large-scale high-speed rotation equipment ultrasonic signal high-speed acquisition system based on acquisition and transmission integration |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090204 Termination date: 20140401 |