CN102790545A - Method for realizing bipolar power supply of logging instrument and power supply system for logging instrument - Google Patents
Method for realizing bipolar power supply of logging instrument and power supply system for logging instrument Download PDFInfo
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- CN102790545A CN102790545A CN2012102714011A CN201210271401A CN102790545A CN 102790545 A CN102790545 A CN 102790545A CN 2012102714011 A CN2012102714011 A CN 2012102714011A CN 201210271401 A CN201210271401 A CN 201210271401A CN 102790545 A CN102790545 A CN 102790545A
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Abstract
The invention provides a method for realizing bipolar power supply of a logging instrument and a power supply system for the logging instrument. The method for realizing the bipolar power supply of the logging instrument comprises following steps that: a positive power supply and a negative power supply are provided from the ground to be collectively inputted to a half H-bridge circuit which is established by a power field effect pipe; a controller outputs a control signal, and the control signal adopts a pulse waveform with adjustable duty ratio and adjustable frequency; the control signal is transmitted by a logic gate circuit to a drive unit for driving the power field effect tube; and the drive unit drives the power field effect tube in the half H-bridge circuit and converts the two power supplies to the needed positive pulse voltage and the needed negative pulse voltage to be transmitted to corresponding underground load. Due to the adoption of the method and the power supply system, the power supply of the positive and the negative pulse voltage can be simply, efficiently and stably realized, and the actual comprehensive requirement of the underground equipment can be satisfied.
Description
Technical field
The present invention relates to a kind of bipolarity method of supplying power to and electric power system thereof of impulse form.
Background technology
Along with Oilfield developing progresses into the middle and later periods, the remaining oil monitoring is the important means that stable high yield is carried out in each oil field.In this type of oil well logging special industry, because the well logging situation is complicated, the downhole instrument that has not only needs the forward power supply, also needs the supply power mode of negative pulse form for some electromagnetic pump system.At present; Can see through the through casing resistivity logging appearance that the steel sleeve pipe removes to measure electrical resistivity of earth layer around oil well is the key instrument that carries out the remaining oil monitoring; The through casing resistivity logging appearance is measured owing to needing special mechanism that electrode system is penetrated on the casing wall; So the situation that contacts of electrode and sleeve pipe will directly influence measurement result, the through casing resistivity logging appearance mostly adopts hydraulic pressure backup mode at present, and power set come from electromagnet; The driving of electromagnet need provide negative pulse voltage, and the downhole instrument power supply needs positive voltage; Existing electric power system can't simply effectively, stably realize the positive negative pulse stuffing power voltage supply.
Summary of the invention
For solving the defective that existing electric power system exists, the present invention provides a kind of method that realizes the power supply of logger bipolarity, and adopts simple and clear electric power system (circuit), reliablely and stablely realizes the power supply output of two kinds of polar voltages.
Basic technical scheme of the present invention is following:
A kind of method that realizes the power supply of logger bipolarity comprises following link:
Ground provides positive and negative two-way power supply, the half H bridge circuit that common input is made up by power field effect pipe;
Controller output control signal, this control signal adopts the impulse waveform of duty ratio and frequency adjustable; Through logic gates control signal is sent in order to drive the driver element of said power field effect pipe;
Power field effect pipe in the drive unit drives half H bridge circuit is that required positive and negative two-way pulse voltage is delivered to corresponding downhole load with said two-way power conversion.
Based on above-mentioned basic technical scheme, the present invention can also do following optimization:
Above-mentioned positive and negative two-way power supply adopts DC power supply; Perhaps above-mentioned positive and negative two-way power supply adopts AC power, and power supply is handled through over commutation earlier before inputing to half H bridge circuit.
Get the said positive and negative two-way pulse voltage of output and deliver to said controller, constitute the feedback regulation link as the two-way feedback signal.
Back level at power field effect pipe is added with filtering and absorbs circuit, thereby eliminates the spike from downhole load.
The host computer on ground is regulated the duty ratio and the frequency of the impulse waveform of above-mentioned controller output through software.
The two-way feedback signal is delivered to said controller, also carries out sample conversion, is sent to the host computer monitoring software on ground in real time, and the voltage and current that consumes under the opposed polarity is shown in host computer monitoring software.
Above-mentioned controller preferably adopts single-chip microcomputer.
According to the method for above realization logger bipolarity power supply, the present invention has also designed a kind of bipolarity electric power system.This electric power system comprises conversion fraction and control section, and wherein, conversion fraction comprises positive and negative two-way power supply that is provided by ground and the half H bridge circuit that is made up by power field effect pipe, the corresponding half H bridge circuit that inserts of two polarity output terminals of positive and negative two-way power supply; Control section comprises controller, logic gates and the driver element that connects successively; The output of driver element is connected to the power field effect pipe in the half H bridge circuit, and positive pulse voltage output end, the negative pulse voltage output of half H bridge circuit are connected to corresponding downhole load respectively;
Said positive and negative two-way power supply adopts DC power supply; Perhaps said positive and negative two-way power supply adopts AC power, and then power output end is all through the corresponding half H bridge circuit that inserts of rectification circuit.
Based on the basic technical scheme of above-mentioned electric power system, can also do following optimization:
Draw feedback signal respectively from said positive pulse voltage output end, negative pulse voltage output, the feedback input end of access controller constitutes the feedback regulation link.
Back level at power field effect pipe is added with filtering and absorbs circuit, thereby eliminates the spike from downhole load.
Also be provided with host computer on ground, the instruction output end of host computer is connected to the input of controller, regulates in order to duty ratio and frequency to the impulse waveform of controller output; Be provided with the sample conversion module in the controller, in order to be sent to the host computer on ground after the two-way feedback signal sample conversion that feedback input end is received.
The present invention has the following advantages:
1. but according to the simple and clear electric power system of method building structure of the present invention, can simply effectively, stably realize the positive negative pulse stuffing power voltage supply.
2. compare the direct current supply mode of general down-hole, thisly provide the method for supplying power to failure rate of impulse form low, just can conveniently solve on ground even go wrong, and can not cause damage downhole instrument by ground.
3. output positive negative pulse stuffing voltage swing can be regulated arbitrarily according to actual needs.
4. pulse duty factor and frequency can be set arbitrarily in upper computer software.
Description of drawings
Fig. 1 is a schematic diagram of the present invention.
Wherein:
1 and 2---the positive and negative two-way power supply that ground provides; 3---rectifier; 4---power field effect pipe; 5---driver element; 6---logic gates; 7---microcontroller; 8 and 9---amplifier circuit; 10---filtering and absorption circuit.
Embodiment
A downhole load part is an electromagnet; Need provide negative pulse to drive, another part is a downhole instrument, needs the positive pulse power supply; The present invention provides the positive and negative two-way pulse power to satisfy the down-hole demand, so the present invention is divided into each and every one aspect of conversion, control, collection, processing four on the whole.Based on the method for realization logger bipolarity power supply of the present invention, a routine circuit structure of design, as shown in Figure 1, conversion fraction comprises the positive and negative power supply 1 of the two-way that is provided by ground and 2, rectifier 3, power field effect pipe 4; Control section comprises microcontroller 7, logic gates 6 and driver element 5; Collecting part comprises amplifier circuit 8 and 9; The processing section comprises the filtering and absorption circuit 10 of back level.
The power supply 1 that ground provides and 2 can be the directly two-way alternating voltage of output of transformer, also can be the two-way DC power supply, does not at this moment just need rectifier.
Adopt power field effect pipe 4 to constitute half H bridge circuit, realize converting supply power voltage into power supply output that two-way has polarity.Because power supply loads on the down-hole,, in circuit, added the feedback regulation link that constitutes by amplifier 8 and 9 in order to monitor the operating state of downhole instrument in real time.
Because actual well logging environment is very complicated; Electromagnet receives the influence of various extraneous factors such as temperature, pressure in underground work; And itself still is impulse form work; Can in circuit loop, produce higher spike, downhole instrument is had adverse effect, add filtering and absorb circuit 10 so be preferably in the back level.
Claims (10)
1. method that realizes logger bipolarity power supply comprises following link:
Ground provides positive and negative two-way power supply, the half H bridge circuit that common input is made up by power field effect pipe;
Controller output control signal, this control signal adopts the impulse waveform of duty ratio and frequency adjustable; Through logic gates control signal is sent in order to drive the driver element of said power field effect pipe;
Power field effect pipe in the drive unit drives half H bridge circuit is that required positive and negative two-way pulse voltage is delivered to corresponding downhole load with said two-way power conversion.
2. the method for realization logger bipolarity power supply according to claim 1 is characterized in that: said positive and negative two-way power supply adopts DC power supply; Perhaps said positive and negative two-way power supply adopts AC power, and power supply is handled through over commutation earlier before inputing to half H bridge circuit.
3. the method for realization logger bipolarity power supply according to claim 2, it is characterized in that: the said positive and negative two-way pulse voltage of getting output is delivered to said controller as the two-way feedback signal, constitutes the feedback regulation link.
4. the method for realization logger bipolarity power supply according to claim 3 is characterized in that: the back level at power field effect pipe is added with filtering and absorbs circuit, thereby eliminates the spike from downhole load.
5. the method for realization logger bipolarity power supply according to claim 4 is characterized in that: the host computer on ground is regulated the duty ratio and the frequency of the impulse waveform of said controller output through software.
6. the method for realization logger bipolarity power supply according to claim 5; It is characterized in that: the two-way feedback signal is delivered to said controller; Also carry out sample conversion; Be sent to the host computer monitoring software on ground in real time, the voltage and current that consumes under the opposed polarity is shown in host computer monitoring software.
7. based on a kind of electric power system of the said method of claim 1; Comprise conversion fraction and control section; Wherein, Conversion fraction comprises positive and negative two-way power supply that is provided by ground and the half H bridge circuit that is made up by power field effect pipe, the corresponding half H bridge circuit that inserts of two polarity output terminals of positive and negative two-way power supply; Control section comprises controller, logic gates and the driver element that connects successively; The output of driver element is connected to the power field effect pipe in the half H bridge circuit, and positive pulse voltage output end, the negative pulse voltage output of half H bridge circuit are connected to corresponding downhole load respectively;
Said positive and negative two-way power supply adopts DC power supply; Perhaps said positive and negative two-way power supply adopts AC power, and then power output end is all through the corresponding half H bridge circuit that inserts of rectification circuit.
8. electric power system according to claim 7 is characterized in that: draw feedback signal respectively from said positive pulse voltage output end, negative pulse voltage output, the feedback input end of access controller constitutes the feedback regulation link.
9. electric power system according to claim 8 is characterized in that: the back level at power field effect pipe is added with filtering and absorbs circuit, thereby eliminates the spike from downhole load.
10. electric power system according to claim 9 is characterized in that: also be provided with host computer on ground, the instruction output end of host computer is connected to the input of controller, regulates in order to duty ratio and frequency to the impulse waveform of controller output; Be provided with the sample conversion module in the controller, in order to be sent to the host computer on ground after the two-way feedback signal sample conversion that feedback input end is received.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012102714011A CN102790545A (en) | 2012-08-01 | 2012-08-01 | Method for realizing bipolar power supply of logging instrument and power supply system for logging instrument |
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| CN2012102714011A CN102790545A (en) | 2012-08-01 | 2012-08-01 | Method for realizing bipolar power supply of logging instrument and power supply system for logging instrument |
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| CN102790545A true CN102790545A (en) | 2012-11-21 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109707367A (en) * | 2018-12-26 | 2019-05-03 | 贵州航天凯山石油仪器有限公司 | A kind of well logging single power supply down-hole power Redundancy Design system and method |
| CN113300578A (en) * | 2021-06-29 | 2021-08-24 | 中地装（重庆）地质仪器有限公司 | Constant current power supply driving circuit of electrode system and geophysical prospecting system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2006158058A (en) * | 2004-11-29 | 2006-06-15 | Kasuga Electric Works Ltd | Inverter device |
| CN202344104U (en) * | 2011-09-29 | 2012-07-25 | 熊猫电子集团有限公司 | Multifunctional digital welding machine |
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2012
- 2012-08-01 CN CN2012102714011A patent/CN102790545A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006158058A (en) * | 2004-11-29 | 2006-06-15 | Kasuga Electric Works Ltd | Inverter device |
| CN202344104U (en) * | 2011-09-29 | 2012-07-25 | 熊猫电子集团有限公司 | Multifunctional digital welding machine |
Non-Patent Citations (1)
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| 胡天运: "5kW 40kHz非对称双极性脉冲开关电源的研制", 《通信电源技术》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109707367A (en) * | 2018-12-26 | 2019-05-03 | 贵州航天凯山石油仪器有限公司 | A kind of well logging single power supply down-hole power Redundancy Design system and method |
| CN109707367B (en) * | 2018-12-26 | 2022-04-19 | 贵州航天凯山石油仪器有限公司 | Single-core power supply underground power supply redundancy design system and method for well logging |
| CN113300578A (en) * | 2021-06-29 | 2021-08-24 | 中地装（重庆）地质仪器有限公司 | Constant current power supply driving circuit of electrode system and geophysical prospecting system |
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Application publication date: 20121121 |