CN2779064Y - Impulse mutual inductance type coupling detector - Google Patents
Impulse mutual inductance type coupling detector Download PDFInfo
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- CN2779064Y CN2779064Y CNU2005200195256U CN200520019525U CN2779064Y CN 2779064 Y CN2779064 Y CN 2779064Y CN U2005200195256 U CNU2005200195256 U CN U2005200195256U CN 200520019525 U CN200520019525 U CN 200520019525U CN 2779064 Y CN2779064 Y CN 2779064Y
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Abstract
The utility model relates to an impulse mutual inductance type detector capable of detecting coupling signals of an oil pipe and a sleeve pipe, which mainly solves the problem that in the prior art, when the extraneous factor is changed, the resolution of a magnetic locator used for detecting the coupling signal on the coupling signal is also changed, and thus, the signal-to-noise ration is changed and the logging information quality is influenced. A sensor, a sequence control circuit, a sensor drive circuit, a signal amplifying and processing circuit and a signal maintaining and pressure-frequency converting circuit are arranged in a detection cylinder, wherein the sensor is composed of a magnetic core (2), a coil rack (3), an excitation coil (4) and a detection coil (1), wherein the magnetic core is arranged in a centre shaft of the coil rack; the exciting coil and the detection coil are wound on the centre shaft of the coil rack; the excitation coil is provided with two signal input ends; the detection coil is provided with two signal output ends and a grounding end composed of an intermediate tap. The utility model has the characteristics of high resolution and high adaptability.
Description
Technical field:
The utility model relates to a kind of testing tool used in the field produces logging technique field, especially relates to a kind of instrument that can detect the box cupling signal of oil pipe and sleeve pipe.
Background technology:
In production logging, the box cupling signal of oil pipe or sleeve pipe is an important log parameter, utilizes this parameter can proofread and correct depth-logger and access tube rod structure.In the prior art, the conventional instrument that the box cupling signal is detected is traditional magnetic localizer.The structure of this magnetic localizer is two a middle magnetic test coil, output termination signal processing circuits of magnetic test coil of placing of permanent magnet steel that polarity is relative.Its logging principle is when the ferromagnetic media around the coil changes, cause the redistribution in magnetic field, make that magnetic flux changes in the coil, thereby just produce induced electromotive force in the coil, by processing and record, just can detect the box cupling signal of oil pipe or sleeve pipe to induced electromotive force.Because the traditional magnetic locator is after the magnetic field intensity of magnet steel and coil parameter are selected, can only under a very narrow or fixing logging speed condition, work, in case when logging technique, tubing string situation and logging speed change, the resolution ratio of this magnetic localizer also changes thereupon, effectively detecting the box cupling signal.For example, when requiring downhole probe to log well between two parties when logging technique, magnetic localizer is also by between two parties, this moment, magnetic localizer was greater than distance when being close to tube wall apart from the distance of tube wall, under the certain situation of logging speed, during by box cupling in the magnetic test coil magnetic flux change amount of magnetic flux change amount when reclining the borehole wall little, the amplitude of coil output induced electromotive force is low, signal to noise ratio is little, has reduced the resolution ratio of magnetic localizer to box cupling.In addition, when instrument by placed in the middle and logging speed is certain, when in the big tubing string of diameter, logging well, the variable quantity of magnetic flux in the coil when variable quantity of magnetic flux is less than in the little tubing string of diameter well logging in the coil, the induced electromotive force amplitude of coil output reduces, the signal to noise ratio of output signal is little, the resolution rate variance of box cupling.In addition, no matter press close to the logging technique of the borehole wall or logging technique placed in the middle, if logging speed is fast, when magnetic localizer passed through box cupling, its coil inside variation rate of magnetic flux was big, output induced electromotive force height, and the signal to noise ratio of output signal is big; Otherwise logging speed is slow, and variation rate of magnetic flux is little, and the output induced electromotive force is low, and the signal to noise ratio of output signal is little.Therefore, the resolution ratio of logging speed difference, magnetic localizer is also different.
In a word, in the well logging process, when tubing string situation, logging speed, when changing near factors such as the borehole wall and instrument are placed in the middle, this magnetic localizer also changes to the resolution ratio of box cupling signal thereupon, has changed signal to noise ratio, influences the quality of well-log information.
The utility model content:
Also change thereupon thereby changed signal to noise ratio, influenced the deficiency of logging data quality in order to overcome magnetic localizer its resolution ratio to the box cupling signal when extraneous factor changes that is used to detect the box cupling signal in the prior art, the utility model provides a kind of pulse mutual-inductance collar detector.This kind pulse mutual-inductance collar detector has resolution ratio height, adaptable characteristics, when it can solve well logging placed in the middle and be close to borehole wall well logging in application to the influence of box cupling resolution ratio, solve the tubing string internal diameter variation to the influence of box cupling resolution ratio and solve the problems such as influence of logging speed to box cupling resolution ratio.
The technical solution of the utility model is: this kind pulse mutual-inductance collar detector comprises placing the sensor, sequential control circuit, sensor drive driving circuit, signal processing circuit and the signal that detect in the tube to keep and the voltage-frequency change-over circuit.Described sensor is different from the structure of magnetic localizer, and it mainly is to be made of magnetic core, bobbin, excitation coil, magnetic test coil.Wherein, magnetic core places the axis inside of bobbin, and excitation coil intersects with magnetic test coil but on the axis that is wound in bobbin insulated from each other.Excitation coil has two signal input parts, is used to import the DC pulse pumping signal.Magnetic test coil has two signal output parts and an earth terminal that is made of centre tap, exports detection signal to be amplified by signal output part to signal processing circuit.
Corresponding with last face sensor is a special drive circuit, and this drive circuit is called as sensor drive driving circuit.It is mainly by microelectronic switch U7, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 9, resistance R 10, resistance R 11, resistance R 12, resistance R 13, resistance R 14, resistance R 15, resistance R 16, resistance R 17, resistance R 21, NPN type triode VT3, NPN type triode VT4, NPN type triode VT7, NPN type triode VT8, positive-negative-positive triode VT1, positive-negative-positive triode VT2, positive-negative-positive triode VT5, positive-negative-positive triode VT6, diode VD1, diode VD2, diode VD3, diode VD4 constitutes.Its concrete annexation is: No. 13 pins of microelectronic switch U7 and No. 12 pin short circuits, No. 6 pins and No. 5 pin short circuits, these two shorted end receive two timing control signals that come from the sequential control circuit respectively, No. 1, No. 9, No. 11 pins on it are connected to positive 5 volts of power supplys through resistance R 6, resistance R 3, resistance R 2 respectively, No. 2, No. 4 pins are respectively through resistance R 4, resistance R 5 ground connection, and No. 8 pins on it are connected to the base stage of NPN type triode VT3, No. 10 pins and are connected to the base stage that the base stage of NPN type triode VT4, No. 3 pins are connected to positive-negative-positive triode VT6; The colelctor electrode of NPN type triode VT3 is connected to positive 5 volts of power supplys, resistance R 9, resistance R 11 ground connection of its emitter stage through being connected in series, and its base stage is through resistance R 10 ground connection; The grounded collector of positive-negative-positive triode VT5, its emitter stage is connected to positive 5 volts of power supplys through resistance R 7, the resistance R 8 that is connected in series, and its base stage is connected to No. 1 pin of microelectronic switch U7; The colelctor electrode of positive-negative-positive triode VT1 is connected to the positive pole of diode VD1, and its emitter stage is connected to positive 5 volts of power supplys, and its base stage is connected to the contact of connecting of resistance R 7 and resistance R 8; The colelctor electrode of NPN type triode VT7 is connected to the negative pole of diode VD2, its grounded emitter, and its base stage is connected to the contact of connecting of resistance R 9 and resistance R 11;
The negative pole of diode VD1 links to each other with the positive pole of diode VD2; The colelctor electrode of NPN type triode VT4 is connected to positive 5 volts of power supplys, resistance R 15, resistance R 16 ground connection of its emitter stage through being connected in series, and its base stage is through resistance R 17 ground connection; The grounded collector of positive-negative-positive triode VT6, its emitter stage is connected to positive 5 volts of power supplys through resistance R 14, the resistance R 12 that is connected in series; The colelctor electrode of positive-negative-positive triode VT2 is connected to the positive pole of diode VD3, and its emitter stage is connected to positive 5 volts of power supplys, and its base stage is connected to the contact of connecting of resistance R 12 and resistance R 14; The colelctor electrode of NPN type triode VT8 is connected to the negative pole of diode VD4, its grounded emitter, and its base stage is connected to the contact of connecting of resistance R 15 and resistance R 16; The negative pole of diode VD3 links to each other with the positive pole of diode VD4, and resistance R 21 is connected between the negative pole of the negative pole of diode VD1 and diode VD3, and the signal output part to the excitation coil output pulse signal of sensor is drawn at resistance R 21 two ends respectively.
The utlity model has following beneficial effect: since the pulse mutual-inductance collar detector of taking such scheme with DC pulse as driving source, keep the phase in DC pulse, the magnetic field intensity of excitation coil is relatively stable, so when it changes, the size that produces induced current on oil pipe or casing wall is by the electromagnetic parameter decision of shape, position and the material thereof of sleeve pipe or oil pipe, therefore induced electromotive force is exactly the function of shape, position and the material electromagnetic property thereof of sleeve pipe or oil pipe in the magnetic test coil, and no longer is subjected to the influence of extraneous other factors.Therefore avoided in testing process, being subjected to whether logging well between two parties, the influence of factors such as the variation of tubing string internal diameter and logging speed, guaranteed the quality of the well-log information that obtained.
Description of drawings:
Accompanying drawing 1 is the structural representation of sensor in the utility model.
Accompanying drawing 2 is signal flow schematic diagrames of the present utility model.
Accompanying drawing 4 is the SECO schematic diagrames in the utility model.
Accompanying drawing 5 is the sensor drive driving circuit electrical schematic diagrams in the utility model.
Accompanying drawing 7 is that the signal in the utility model keeps and voltage-frequency change-over circuit electrical schematic diagram.
1-magnetic test coil among the figure, 2-magnetic core, 3-bobbin, 4-excitation coil.
The specific embodiment:
The utility model is described in further detail below in conjunction with accompanying drawing:
Operating principle of the present utility model at first is described.The logging principle of pulse mutual-inductance collar detector is a Faraday's electromagnetic induction law, its detection method is: an electric pulse is provided for the sensor excitation coil, keep the phase in pulse, produce a stabilizing magnetic field around the excitation coil, after DC pulse stops, this stabilizing magnetic field changes and progressively disappears, the magnetic field that changes produces in oil pipe or sleeve pipe along the annular induced current of tube wall rotation, this induced current produces secondary magnetic field again at oil pipe or inside pipe casing, and this secondary magnetic field just makes the sensor magnetic test coil produce one in time and the induced electromotive force of decay.That is:
dΦ＝ds·B
Wherein: ε is induced electromotive force, the S magnetic test coil gross area (S=KS of magnetic test coil
1N, S
1Single area coil, N are that coil turn, K are magnetic constant), Φ is that magnetic flux, B are secondary magnetic field intensity.Because of keeping the phase in DC pulse, the magnetic field intensity of excitation coil is relatively stable, so when it changes, the size that produces induced current on oil pipe or casing wall is by the electromagnetic parameter decision of shape, position and the material thereof of sleeve pipe or oil pipe, and secondary magnetic field intensity B and variation rate of magnetic flux d Φ are subjected to the influence of induced current size, therefore, induced electromotive force ε is the function of shape, position and the material electromagnetic property thereof of sleeve pipe or oil pipe in the magnetic test coil, that is:
ε＝f(h，μ，σ，d，t)
Wherein: h--tubing string thickness; μ--tubing string magnetic conductivity; б--tubing string electrical conductivity; The outer warp of d--tubing string; The t--environment temperature.When in oil pipe or sleeve pipe, logging well, the thickness and the external diameter of tubing coupling or casing coupling all change, thereby have caused the variation of induced electromotive force ε, therefore by the measurement to induced electromotive force, just can detect the position of oil pipe or casing coupling, obtain the collar curve of tubing string.
In conjunction with shown in Figure 2, pulse mutual-inductance collar detector comprises that the sensor, sequential control circuit, sensor drive driving circuit, signal processing circuit and the signal that place in the detection tube keep and the voltage-frequency change-over circuit as Fig. 1.Wherein sensor is made of magnetic core 2, bobbin 3, excitation coil 4, magnetic test coil 1, and magnetic core 2 places the axis inside of bobbin 3, and excitation coil 4 crosses one another with magnetic test coil 1 but is wound on the axis of bobbin 3 insulated from each otherly.Excitation coil 4 has two signal input parts, and magnetic test coil 1 has two signal output parts and an earth terminal that is made of centre tap.The circuit part that matches with this sensor is kept by sequential control circuit, sensor drive driving circuit, signal processing circuit, signal and the voltage-frequency change-over circuit is formed.Wherein sequential control circuit is for other circuit provides timing control signal, makes the entire circuit can synchronous working; Sensor drive driving circuit makes excitation coil produce the steady magnetic field that is interrupted for the sensor excitation coil provides the pulse direct current electric current; Signal processing circuit is the box cupling signal that the sensor magnetic test coil is exported to be carried out amplitude limit amplify and shaping; Signal keeps and the voltage-frequency change-over circuit is that signal is kept in sampling time interval, and it is carried out the voltage-frequency conversion.
The sequential control circuit electrical schematic diagram as shown in Figure 3, the time oscillator of being made up of NAND gate U1-1, U1-2, resistance R 1, capacitor C 1 produces cycle 60us clock signal.This signal one provides clock CP for frequency divider, and two provide time control signal K5 with circuit repeatedly for the back.Frequency divider U2 carries out frequency division to clock CP, through the modulation circuit that NAND gate U4, six reverser U5, U6 and 8 NAND gate U3 form fractional frequency signal is modulated, acquisition control signal K1, K2, K3, K4 control sensor drive driving circuit, signal processing circuit, signal maintenance and voltage-frequency change-over circuit respectively, and its sequential as shown in Figure 4.
Sensor drive driving circuit as shown in Figure 5, mainly by microelectronic switch U7, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 9, resistance R 10, resistance R 11, resistance R 12, resistance R 13, resistance R 14, resistance R 15, resistance R 16, resistance R 17, resistance R 21, NPN type triode VT3, NPN type triode VT4, NPN type triode VT7, NPN type triode VT8, positive-negative-positive triode VT1, positive-negative-positive triode VT2, positive-negative-positive triode VT5, positive-negative-positive triode VT6, diode VD1, diode VD2, diode VD3, diode VD4 constitutes.Its detailed annexation is: No. 13 pins and No. 12 pin short circuits of microelectronic switch U7, No. 6 pins and No. 5 pin short circuits, these two shorted end receive two timing control signal K1 that come from the sequential control circuit respectively, K2, on it No. 1, No. 9, No. 11 pins are respectively through resistance R 6, resistance R 3, resistance R 2 is connected to positive 5 volts of power supplys, No. 2, No. 4 pins are respectively through resistance R 4, resistance R 5 ground connection, No. 8 pins on it are connected to the base stage of NPN type triode VT3, No. 10 pins are connected to the base stage of NPN type triode VT4, No. 3 pins are connected to the base stage of positive-negative-positive triode VT6; The colelctor electrode of NPN type triode VT3 is connected to positive 5 volts of power supplys, resistance R 9, resistance R 11 ground connection of its emitter stage through being connected in series, and its base stage is through resistance R 10 ground connection; The grounded collector of positive-negative-positive triode VT5, its emitter stage is connected to positive 5 volts of power supplys through resistance R 7, the resistance R 8 that is connected in series, and its base stage is connected to No. 1 pin of microelectronic switch U7; The colelctor electrode of positive-negative-positive triode VT1 is connected to the positive pole of diode VD1, and its emitter stage is connected to positive 5 volts of power supplys, and its base stage is connected to the contact of connecting of resistance R 7 and resistance R 8; The colelctor electrode of NPN type triode VT7 is connected to the negative pole of diode VD2, its grounded emitter, and its base stage is connected to the contact of connecting of resistance R 9 and resistance R 11; The negative pole of diode VD1 links to each other with the positive pole of diode VD2; The colelctor electrode of NPN type triode VT4 is connected to positive 5 volts of power supplys, resistance R 15, resistance R 16 ground connection of its emitter stage through being connected in series, and its base stage is through resistance R 17 ground connection; The grounded collector of positive-negative-positive triode VT6, its emitter stage is connected to positive 5 volts of power supplys through resistance R 14, the resistance R 12 that is connected in series; The colelctor electrode of positive-negative-positive triode VT2 is connected to the positive pole of diode VD3, and its emitter stage is connected to positive 5 volts of power supplys, and its base stage is connected to the contact of connecting of resistance R 12 and resistance R 14; The colelctor electrode of NPN type triode VT8 is connected to the negative pole of diode VD4, its grounded emitter, and its base stage is connected to the contact of connecting of resistance R 15 and resistance R 16; The negative pole of diode VD3 links to each other with the positive pole of diode VD4, and resistance R 21 is connected between the negative pole of the negative pole of diode VD1 and diode VD3, and signal output part S1, the S2 to the excitation coil output pulse signal of sensor drawn at resistance R 21 two ends respectively.
Control signal K1, the K2 that sequential control circuit produces controls 12 pin, 13 pin and 5 pin, 6 pin of microelectronic switch U7 respectively.When the trailing edge of K1 signal comes interim, 1 pin of microelectronic switch U7 and the connection of 2 pin, 10 pin and 11 pin are connected, at this moment triode VT1, VT5, VT4, VT8 are in conducting state, electric current flows into power supply ground through diode VD4, triode VT8 again by the excitation coil of triode VT1, diode VD1 flow sensor.Next interim when the rising edge of K1 signal, 1 pin of microelectronic switch U7 and the disconnection of 2 pin, 10 pin and 11 pin disconnect, and at this moment triode VT1, VT5, VT4, VT8 are in cut-off state, and electric current stops the excitation coil of flow sensor.In like manner, when the trailing edge of K2 signal comes interim, 3 pin of microelectronic switch U7 and the connection of 4 pin, 8 pin and 9 pin are connected, at this moment triode VT3, VT7, VT2, VT6 are in conducting state, electric current is by the excitation coil of triode VT2, diode VD3 flow sensor, flow into power supply ground through diode VD2, triode VT7 again, when the rising edge of K2 signal comes interim, 3 pin of microelectronic switch U7 and the disconnection of 4 pin, 8 pin and 9 pin disconnect, at this moment triode VT3, VT7, VT2, VT6 are in cut-off state, and electric current stops the excitation coil of flow sensor.By above process, realize driving to sensor excitation coil pulse single flow, make excitation coil produce the steady magnetic field that is interrupted on every side.
Fig. 6 is the electrical schematic diagram of the signal processing circuit in the utility model, the box cupling signal of sensor magnetic test coil output is transported to the U8 that adopts integrated circuit block OP07, the input S3 of the differential amplifier that U9 and U10 form, S4 and S5, through diode VD5, VD6, VD7 and VD8 amplitude limit, with signal limiter at 0.5V, by differential amplifier signal is amplified then, 6 pin output by U10, and by Zener diode VD9, VD10 is with signal voltage stabilizing 4.7V, signal after the voltage stabilizing is received 1 pin of U13-1, clock signal K4 connects 13 pin of U13-1, control 1 pin of U13-1 and the break-make of 2 pin are finished collection to signal in the negative pulse of K4 in the time interval.Signal after the collection is definitely handled signal and suitable amplification adjustment via the absolute value circuit that U11, U12 form, to satisfy the needs of subsequent conditioning circuit.
Fig. 7 is that the signal in the utility model keeps and voltage-frequency change-over circuit electrical schematic diagram, form signal holding circuit by integrated circuit block U13-9, U13-3, U13-4, U14-1, U14-2 and capacitor C 6 and C7, when K3 positive pulse and the arrival of K4 negative pulse, beginning received signal amplification treatment circuit output signal AC is when pulse is finished the reception of signal and signal is kept later.The voltage-frequency change-over circuit of being made up of integrated circuit block U15 and some resistance capacitances converts the voltage signal that keeps to pulse duration frequency signal FC, this frequency signal both can directly transmit on cable by the cable drive circuit, so that ground instrument carries out record to collar curve, also can be used as box cupling parameter and other log parameter and be sent to ground together.
As follows to the selection of part electrical equipment in this example: integrated package U1-1, U1-2, U4-1, U4-2, U4-3, U4-4 selects CD4011, resistance R 1=181 kilo-ohm, capacitor C 1=180 pico farad, capacitor C 2=103 farad, integrated package U5-1, U5-2, U5-3, U5-4, U5-5, U5-6 all selects CD4069, integrated package U6-1, U6-2, U6-3 all selects CD4011, microelectronic switch U7 selects CD4066, positive-negative-positive triode VT1, VT2, VT5, VT6 selects TIP32C, NPN type triode VT3, VT4, VT7, VT8 selects TIP31C, diode VD1, VD2, VD3, VD4 selects BTV-28-60, resistance R 2, R3, R4, R5 is 1 kilo-ohm, resistance R 6, R10, R13, R17, R19, R20 is 2 kilo-ohms, resistance R 7, R11, R12, R16 is 100 Europe, resistance R 8, R9, R14, R15 is 8.2 kilo-ohms, R18=7.5 kilo-ohm.Integrated package U8, U9, U10 adopt OP07, and integrated package U13-2, U13-3, U13-4 all select CD4066 for use, and integrated package U15 is that model is the voltage-frequency converter of VF32, and integrated package U14-1, U14-2 are that model is the dual operational amplifier of CF353.Integrated package U16-1, U16-2 are d type flip flop, and its model is 4013.Integrated package U17-1, U17-2 are Schmidt trigger, and its model is 4093.Integrated package U18 is single operational amplifier, and its model is OP027.Integrated package U19 is a power amplifier, and its model is BUF634P.
After pulse mutual-inductance tubing and casing collar detector completes, in different tubular column structure wells, carried out actual well logging test with different logging speeds.From the logging effect analysis, pulse mutual-inductance tubing and casing collar detector has not only overcome the defective that the traditional magnetic locator exists, but also has following technical characterstic:
1, pulse mutual-inductance tubing and casing collar detector not only can detect the box cupling signal of oil pipe and sleeve pipe, determine the position of tubing coupling and casing coupling, but also can detect the tubular column structure and the instrument setting of producing well, provide the variation of tubing string internal diameter etc. qualitatively.
2, under and logging speed is slow (50-100m/h) the condition placed in the middle at instrument, this instrument has The better resolution to the tubing and casing box cupling, in therefore may be used on planting low speed well logging placed in the middle under.
3, this instrument can be logged well separately, also can connect use with Other Instruments.
4, be adapted to the logging speed scope (50-1200m/h) of broad.
5, be adapted to tubing string diameter: 60--320mm.
6, be adapted to pipe thickness: 3--12mm.
Claims (2)
1, a kind of pulse mutual-inductance collar detector, comprise and place the sensor that detects in the tube, sequential control circuit, sensor drive driving circuit, signal processing circuit and signal keep and the voltage-frequency change-over circuit, it is characterized in that: described sensor is by magnetic core (2), bobbin (3), excitation coil (4), magnetic test coil (1) constitutes, wherein, magnetic core (2) places the axis inside of bobbin (3), excitation coil (4) is wound on the axis of bobbin (3) with magnetic test coil (1), excitation coil (4) has two signal input parts, and magnetic test coil (1) has two signal output parts and an earth terminal that is made of centre tap.
2, pulse mutual-inductance collar detector according to claim 1 is characterized in that: sensor drive driving circuit is mainly by microelectronic switch U7, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, resistance R 8, resistance R 9, resistance R 10, resistance R 11, resistance R 12, resistance R 13, resistance R 14, resistance R 15, resistance R 16, resistance R 17, resistance R 21, NPN type triode VT3, NPN type triode VT4, NPN type triode VT7, NPN type triode VT8, positive-negative-positive triode VT1, positive-negative-positive triode VT2, positive-negative-positive triode VT5, positive-negative-positive triode VT6, diode VD1, diode VD2, diode VD3, diode VD4 constitutes;
No. 13 pins of microelectronic switch U7 and No. 12 pin short circuits, No. 6 pins and No. 5 pin short circuits, these two shorted end receive two timing control signals (K1, K2) that come from the sequential control circuit respectively, No. 1, No. 9, No. 11 pins on it are connected to positive 5 volts of power supplys through resistance R 6, resistance R 3, resistance R 2 respectively, No. 2, No. 4 pins are respectively through resistance R 4, resistance R 5 ground connection, and No. 8 pins on it are connected to the base stage of NPN type triode VT3, No. 10 pins and are connected to the base stage that the base stage of NPN type triode VT4, No. 3 pins are connected to positive-negative-positive triode VT6;
The colelctor electrode of NPN type triode VT3 is connected to positive 5 volts of power supplys, resistance R 9, resistance R 11 ground connection of its emitter stage through being connected in series, and its base stage is through resistance R 10 ground connection;
The grounded collector of positive-negative-positive triode VT5, its emitter stage is connected to positive 5 volts of power supplys through resistance R 7, the resistance R 8 that is connected in series, and its base stage is connected to No. 1 pin of microelectronic switch U7;
The colelctor electrode of positive-negative-positive triode VT1 is connected to the positive pole of diode VD1, and its emitter stage is connected to positive 5 volts of power supplys, and its base stage is connected to the contact of connecting of resistance R 7 and resistance R 8;
The colelctor electrode of NPN type triode VT7 is connected to the negative pole of diode VD2, its grounded emitter, and its base stage is connected to the contact of connecting of resistance R 9 and resistance R 11;
The negative pole of diode VD1 links to each other with the positive pole of diode VD2;
The colelctor electrode of NPN type triode VT4 is connected to positive 5 volts of power supplys, resistance R 15, resistance R 16 ground connection of its emitter stage through being connected in series, and its base stage is through resistance R 17 ground connection;
The grounded collector of positive-negative-positive triode VT6, its emitter stage is connected to positive 5 volts of power supplys through resistance R 14, the resistance R 12 that is connected in series;
The colelctor electrode of positive-negative-positive triode VT2 is connected to the positive pole of diode VD3, and its emitter stage is connected to positive 5 volts of power supplys, and its base stage is connected to the contact of connecting of resistance R 12 and resistance R 14;
The colelctor electrode of NPN type triode VT8 is connected to the negative pole of diode VD4, its grounded emitter, and its base stage is connected to the contact of connecting of resistance R 15 and resistance R 16;
The negative pole of diode VD3 links to each other with the positive pole of diode VD4, and resistance R 21 is connected between the negative pole of the negative pole of diode VD1 and diode VD3, and draw respectively to the signal output part of the excitation coil output pulse signal of sensor (S1, S2) at resistance R 21 two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200195256U CN2779064Y (en) | 2005-04-28 | 2005-04-28 | Impulse mutual inductance type coupling detector |
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2005200195256U CN2779064Y (en) | 2005-04-28 | 2005-04-28 | Impulse mutual inductance type coupling detector |
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| CN2779064Y true CN2779064Y (en) | 2006-05-10 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101581214B (en) * | 2009-03-23 | 2012-07-11 | 西安石油大学 | Transient electromagnetic logging device in cased well |
| CN104564033A (en) * | 2015-02-13 | 2015-04-29 | 烟台杰瑞石油装备技术有限公司 | Pipeline coupling detection device |
-
2005
- 2005-04-28 CN CNU2005200195256U patent/CN2779064Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101581214B (en) * | 2009-03-23 | 2012-07-11 | 西安石油大学 | Transient electromagnetic logging device in cased well |
| CN104564033A (en) * | 2015-02-13 | 2015-04-29 | 烟台杰瑞石油装备技术有限公司 | Pipeline coupling detection device |
| CN104564033B (en) * | 2015-02-13 | 2017-10-27 | 烟台杰瑞石油装备技术有限公司 | A kind of pipeline coupling detection means |
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Granted publication date: 20060510 Termination date: 20140428 |