CN201953377U - Signal transmission device for coal seam gas well detection signal - Google Patents
Signal transmission device for coal seam gas well detection signal Download PDFInfo
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- CN201953377U CN201953377U CN2010206611966U CN201020661196U CN201953377U CN 201953377 U CN201953377 U CN 201953377U CN 2010206611966 U CN2010206611966 U CN 2010206611966U CN 201020661196 U CN201020661196 U CN 201020661196U CN 201953377 U CN201953377 U CN 201953377U
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Abstract
The utility model provides a signal transmission device for coal seam gas well detection signals, which is low in cost and stable in signal transmission. The device comprises a ground system and a down-hole system lectrically connected with each other by cables. The ground system comprises a power supply, a first triode, a second triode, a plurality of resistors and a signal processing terminal. The power supply provides a working voltage for the ground system and the down-hole system. The down-hole system comprises a diode, a capacitance, a voltage converting circuit, a third triode, a plurality of resistors, a signal processing circuit and a sensor. The detected information is processed by the signal processing circuit and then is outputted in a high-low level mode by the sensor. The first triode, the second triode and the third triode can be turned on or turned off according to the level change of the signal processing circuit. When the signal processing circuit outputs a high level, the voltage of the input terminal of the signal processing terminal is at a low level. When the signal processing circuit outputs a low level, the voltage of the input terminal of the signal processing terminal is at a high level.
Description
Technical field
The utility model relates to a kind of signal transmission apparatus, and particularly relevant for a kind of signal transmission apparatus that is used for coal bed gas well.
Background technology
Important effect is being brought into play in production logging in the oil coal exploitation, survey in the system in production, ground installation general using single-cord well logging cable is as transmission channel, thereby downhole instrument is carried out remote power feeding, information gathering and control, thereby obtain the foundation of the well information of multiple complexity as reasonable development.
In the current prior art, in the production logging field, utilize one to two chip that the signal that downhole instrument records is handled, the data owner after the processing will rely on conventional single-cord well logging cable realization ground system and the transmission between downhole instrument.Yet,, perplexed by problems such as signal attenuation, distortion, electromagnetic interference owing to be subjected to the influence of adverse circumstances such as transmission medium, design philosophy, manufacturing process and down-hole high temperature, high pressure, the interference of well head power-equipment.In addition, chip price of the prior art is more expensive, causes the entire equipment cost higher.
The utility model content
At the problems referred to above, the purpose of this utility model provides a kind of signal transmission apparatus that is used for the coal bed gas well detectable signal, and its stable signal transmission, cost are lower.
The utility model proposes a kind of signal transmission apparatus that is used for the coal bed gas well detectable signal, this equipment comprises ground system and the downhole system that electrically connects by cable.This ground system comprises power supply, first triode, second triode, some resistance, and the signal processing terminal, and this power supply provides operating voltage for this ground system and this downhole system.This downhole system comprises diode, electric capacity, voltage conversion circuit, the 3rd triode, some resistance, signal processing circuit and sensor, this sensor will record information handle by this signal processing circuit after, with the form output of high-low level, this first to the 3rd triode can change conducting because of the height of signal processing circuit output level or end.When signal processing circuit is exported a high level, the input terminal voltage of signal processing terminal is a low level; When signal processing circuit is exported a low level, the input terminal voltage of signal processing terminal is a high level.
Preferably, this cable is a single core coaxial cable.
Preferably, the height state of this signal processing terminal incoming level is subjected to the conducting of this first to the 3rd triode or ends to influence, when this signal processing circuit is exported a high level, and first to the 3rd triode conducting, signal processing terminal input terminal voltage is a low level; When this signal processing circuit was exported a low level, first to the 3rd triode ended, and signal processing terminal input terminal voltage is a high level.
Preferably, some resistance of this ground system comprise first to the 5th resistance, this power supply one end ground connection, the other end is exported operating voltage to the first resistance, and first resistance is connected to downhole system by cable, and the two ends of first resistance are connected to the emitter stage and the base stage of first triode respectively, and the colelctor electrode of first triode is connected back ground connection with second and third resistance that is used for dividing potential drop, the 4th resistance one end is connected between second and third resistance, and the other end is connected to the base stage of second triode; The grounded emitter of second triode, colelctor electrode are connected to the 5th resistance, and the 5th resistance is connected to the equal-sized voltage of high level with signal processing circuit output, and the signal processing terminal is connected between the colelctor electrode and the 5th resistance of second triode.
Preferably, this first triode is the PNP triode, and second and third triode is a NPN type triode.
Preferably, this first triode is as a current inductor, and it utilizes the voltage difference between emitter stage and the base stage, controls the break-make between its emitter and collector.
Preferably, the anode of this diode is connected to first resistance in the ground system by cable, and negative electrode is connected to the input of voltage conversion circuit and the anode of electric capacity, the minus earth of electric capacity respectively; The conducting when work of this diode.This voltage conversion circuit will be the voltage that is fit to signal processing circuit by the voltage transitions of diode input, and the voltage after this conversion is inputed to signal processing circuit, and voltage conversion circuit also has an end ground connection.
Preferably, some resistance of this downhole system comprise the 6th to the 8th resistance, the input of this signal processing circuit links to each other with the output of voltage conversion circuit, ground connection after the output of signal processing circuit is connected with the 7th and the 8th resistance that is used for dividing potential drop, and signal processing circuit also has an end ground connection.
Preferably, the 6th resistance one end is connected to the anode of diode, and the other end is connected to the colelctor electrode of the 3rd triode, the grounded emitter of the 3rd triode, and the base stage of the 3rd triode is connected between the 7th resistance and the 8th resistance.
Preferably, this signal processing terminal is a signal alarm, display or signal processing apparatus.
The data of signal transmission apparatus of the present utility model by will be after downhole detection are directly by the electric current adjustment, and dynamic load feeds back to ground, and signal can distortion, and therefore, stable signal transmission is good.Simultaneously, the equal cost of electronic component that the utility model adopts is lower, and circuit structure is simple, greatly reduces the cost of equipment.
Above-mentioned explanation only is the general introduction of technical solutions of the utility model, for can clearer understanding technological means of the present utility model, and can be implemented according to the content of manual, and for above-mentioned and other purpose, feature and advantage of the present utility model can be become apparent, below especially exemplified by embodiment, and conjunction with figs., be described in detail as follows.
Description of drawings
Fig. 1 is the circuit diagram of the signal transmission apparatus of the utility model preferred embodiment.
The specific embodiment
The utility model proposes a kind of stable signal transmission, lower-cost signal transmission apparatus at the problem that exists in the above conventional art, and this equipment is used for the signal detection of coal bed gas well.See also Fig. 1, Fig. 1 is the circuit diagram of the signal transmission apparatus of the utility model preferred embodiment.In the present embodiment, signal transmission apparatus 100 comprises ground system 10 and downhole system 20, ground system 10 and downhole system 20 electrically connects by cable 30, with from ground system 10 supply voltages to downhole system 20, and the signal that will record from the down-hole from downhole system 20 transfers to ground system 10.This cable 30 is a single core coaxial cable, and its length can reach more than 4000 meters.
Particularly, the circuit that ground system 10 comprises power supply P1, is made of triode Q1, Q2 and resistance R 1 ~ R5, and signal processing terminal U2.Wherein, power supply P1 is used to supply operating voltage, and in the present embodiment, this operating voltage is 24V.Details are as follows for the physical circuit annexation of ground system 10.Power supply P1 one end ground connection, other end output+24V voltage is to resistance R 1, and resistance R 1 is connected to downhole system 20 by cable 30.In ground system 10, the two ends of resistance R 1 have two nodes of G, K respectively, and the G point is connected to emitter stage and the base stage of triode Q1.The colelctor electrode of triode Q1 is connected with divider resistance R2 and R3, resistance R 3 ground connection.Wherein, have a node C between resistance R 2 and the R3, have a node D between the colelctor electrode of triode Q1 and the resistance R 2.Resistance R 4 one ends are connected to the node C between resistance R 2 and the R3, and the other end further is connected to the base stage of triode Q2.The grounded emitter of triode Q2, colelctor electrode are connected to resistance R 5.Resistance R 5 also is connected to the voltage of a 5V.Have a Node B between the colelctor electrode of triode Q2 and the resistance R 5, signal processing terminal U2 is connected to this Node B.
In the present embodiment, under the preferable situation, triode Q1 is the PNP triode, and triode Q2 is a NPN type triode.The resistance of resistance R 1 is 35 Ω, and the resistance of resistance R 2 is 19K Ω, and the resistance of resistance R 3 is 5K Ω, and the resistance of resistance R 5 is 10K Ω.Wherein, as a current inductor, it utilizes the voltage difference between G, the K at 2 to triode Q1, controls the break-make (that is the break-make of G, D point-to-point transmission) between the emitter and collector in this circuit.Voltage difference between 2 of resistance R 1 two ends G, the K is to be formed by the electric current I on the 24V power line, and this electric current I is the electric current of the resistance R 1 of flowing through.Signal processing terminal U2 can be a signal alarm, display or a signal processing apparatus (as computer, central processing unit etc.).
The input of signal processing circuit U3 links to each other with the output of voltage conversion circuit U1, and output is connected with divider resistance R7, R8, and resistance R 8 ground connection.Signal processing circuit U3 also has an earth terminal.Wherein, have a node A between the output of signal processing circuit U3 and the resistance R 7, have a node H between resistance R 7 and the resistance R 8.
The anode of diode D1 has a node F, and resistance R 6 one ends are connected to the F point, and the other end is connected to the colelctor electrode of triode Q3, the grounded emitter of triode Q3, and the base stage of triode Q3 is connected to the node H between resistance R 7 and the resistance R 8.In addition, has a node E between the colelctor electrode of triode Q3 and the resistance R 6.
In addition, voltage conversion circuit U1 output+5V voltage also is supplied to load L to use, and this load L comprises a sensor (figure does not show) in the present embodiment.This sensor is used for the one or more of ambient parameter such as the temperature, humidity, air pressure of sensing down-hole, and after the information that will record handles by signal processing circuit U3, with the form output of high-low level.
In the present embodiment, tell two branch roads from the F point, i.e. diode D1 place branch road and resistance R 6 place branch roads, wherein, the electric current of the diode D1 that flows through is I
1, the electric current of the resistance R of flowing through 6 is I
2, obviously, I=I
1+ I
2, I is the electric current of resistance R 1 of flowing through.
More than be the circuit introduction of signal transmission apparatus 100 described in the utility model, will introduce the principle of its course of work below.Power supply P1 provides one+24V voltage, and then diode D1 conducting through diode D1, capacitor C 1, obtains a unidirectional stable electric current I
1Simultaneously, through voltage conversion circuit U1, stable voltage of conversion output (+5V), this voltage output is for signal processing circuit U3, load L(sensor) use.
When sensor sensing one parameter, and after the information that will record handles by signal processing circuit U3, with the form output of high-low level.When signal processing circuit U3 handle this parameter and export high level (as+5V) time, that is, when the A point voltage was high level, this high level was after resistance R 7, R8 dividing potential drop, H point voltage between resistance R 7 and the R8 is higher than the colelctor electrode voltage-to-ground of triode Q3, drives triode Q3 conducting.In the present embodiment, the H point voltage between resistance R 7 and the R8 for example is 0.7V, and triode Q3 colelctor electrode saturation voltage over the ground is about 0.2V.Thus, there is electric current to flow through between F, the E point at resistance R 6 two ends, i.e. I
2=(U
F-U
E)/R6, wherein, U
FBe the voltage that F is ordered, U
EThe voltage of ordering for E.
Simultaneously, when signal processing circuit U3 output terminals A point voltage be high level (as+5V) time, I=I
1+ I
2, as I*R1 〉=0.7V, triode Q1 conducting, the saturation voltage difference between 2 of G, the D is about 0.2V.The C point voltage is U
D* R3/ (R2+R3), wherein, U
DThe voltage of ordering for D.If the voltage that C is ordered is higher than 0.7V, then triode Q2 conducting, triode Q2 colelctor electrode saturation voltage over the ground is about 0.2V, and at this moment, the B point voltage is 0V.
When signal processing circuit U3 output terminals A point was low level (0V), triode Q3 ended, i.e. I
2=0, I=I
1If, I
1* R1＜0.7V, then triode Q1 ends, and C point voltage 0V causes triode Q2 to end, and then the B point voltage is 5V.
In sum, when signal processing circuit U3 output terminals A point voltage is a high level, the input B point voltage of signal processing terminal U2 is low level (0V), otherwise, when signal processing circuit U3 output terminals A point voltage is a low level, the input B point voltage of signal processing terminal U2 be high level (+5V).Thus, realize the communication process that A point signal is ordered to B.
In sum, the data of signal transmission apparatus of the present utility model by will be after downhole detection are directly by the electric current adjustment, and dynamic load feeds back to ground, and signal can distortion, and therefore, stable signal transmission is good.Simultaneously, the equal cost of electronic component that the utility model adopts is lower, and circuit structure is simple, greatly reduces the cost of equipment.
The above, only be embodiment of the present utility model, be not that the utility model is done any pro forma restriction, though the utility model discloses as above with embodiment, yet be not in order to limit the utility model, any those skilled in the art, in not breaking away from the technical solutions of the utility model scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be not break away from the technical solutions of the utility model content, according to technical spirit of the present utility model to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solutions of the utility model.
Claims (10)
1. a signal transmission apparatus that is used for the coal bed gas well detectable signal is used for the coal bed gas well detectable signal, and this signal transmission apparatus comprises ground system and downhole system, and this ground system and this downhole system electrically connect by cable, it is characterized in that:
This ground system comprises power supply, first triode, second triode, some resistance, and the signal processing terminal, and this power supply provides operating voltage for this ground system and this downhole system;
This downhole system comprises diode, electric capacity, voltage conversion circuit, the 3rd triode, some resistance, signal processing circuit and sensor, this sensor will record information handle by this signal processing circuit after, with the form output of high-low level, this first to the 3rd triode can change conducting because of the height of signal processing circuit output level or end.
2. the signal transmission apparatus that is used for the coal bed gas well detectable signal according to claim 1 is characterized in that, this cable is a single core coaxial cable.
3. the signal transmission apparatus that is used for the coal bed gas well detectable signal according to claim 2, it is characterized in that, the height state of this signal processing terminal incoming level is subjected to the conducting of this first to the 3rd triode or ends to influence, when this signal processing circuit is exported a high level, first to the 3rd triode conducting, signal processing terminal input terminal voltage is a low level; When this signal processing circuit was exported a low level, first to the 3rd triode ended, and signal processing terminal input terminal voltage is a high level.
4. the signal transmission apparatus that is used for the coal bed gas well detectable signal according to claim 1, it is characterized in that, some resistance of this ground system comprise first to the 5th resistance, this power supply one end ground connection, the other end is exported operating voltage to the first resistance, and first resistance is connected to downhole system by cable, the two ends of first resistance are connected to the emitter stage and the base stage of first triode respectively, the colelctor electrode of first triode is connected back ground connection with second and third resistance that is used for dividing potential drop, the 4th resistance one end is connected between second and third resistance, and the other end is connected to the base stage of second triode; The grounded emitter of second triode, colelctor electrode are connected to the 5th resistance, and the 5th resistance is connected to the equal-sized voltage of high level with signal processing circuit output, and the signal processing terminal is connected between the colelctor electrode and the 5th resistance of second triode.
5. the signal transmission apparatus that is used for the coal bed gas well detectable signal according to claim 4 is characterized in that, this first triode is the PNP triode, and second and third triode is a NPN type triode.
6. the signal transmission apparatus that is used for the coal bed gas well detectable signal according to claim 5, it is characterized in that, this first triode is as a current inductor, and it utilizes the voltage difference between emitter stage and the base stage, controls the break-make between its emitter and collector.
7. the signal transmission apparatus that is used for the coal bed gas well detectable signal according to claim 5, it is characterized in that, the anode of this diode is connected to first resistance in the ground system by cable, and negative electrode is connected to the input of voltage conversion circuit and the anode of electric capacity, the minus earth of electric capacity respectively; The conducting when work of this diode;
This voltage conversion circuit will be the voltage that is fit to signal processing circuit by the voltage transitions of diode input, and the voltage after this conversion is inputed to signal processing circuit, and voltage conversion circuit also has an end ground connection.
8. the signal transmission apparatus that is used for the coal bed gas well detectable signal according to claim 7, it is characterized in that, some resistance of this downhole system comprise the 6th to the 8th resistance, the input of this signal processing circuit links to each other with the output of voltage conversion circuit, ground connection after the output of signal processing circuit is connected with the 7th and the 8th resistance that is used for dividing potential drop, signal processing circuit also has an end ground connection.
9. the signal transmission apparatus that is used for the coal bed gas well detectable signal according to claim 8, it is characterized in that, the 6th resistance one end is connected to the anode of diode, the other end is connected to the colelctor electrode of the 3rd triode, the grounded emitter of the 3rd triode, the base stage of the 3rd triode are connected between the 7th resistance and the 8th resistance.
10. the signal transmission apparatus that is used for the coal bed gas well detectable signal according to claim 1 is characterized in that, this signal processing terminal is a signal alarm, display or signal processing apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206611966U CN201953377U (en) | 2010-12-15 | 2010-12-15 | Signal transmission device for coal seam gas well detection signal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206611966U CN201953377U (en) | 2010-12-15 | 2010-12-15 | Signal transmission device for coal seam gas well detection signal |
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| Publication Number | Publication Date |
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| CN201953377U true CN201953377U (en) | 2011-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206611966U Expired - Fee Related CN201953377U (en) | 2010-12-15 | 2010-12-15 | Signal transmission device for coal seam gas well detection signal |
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|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536214A (en) * | 2010-12-15 | 2012-07-04 | 常州凯锐自动化控制设备有限公司 | Signal transmission equipment for coal-bed gas well detection signals |
| CN106761711A (en) * | 2016-12-26 | 2017-05-31 | 中石化江汉石油工程有限公司 | A kind of downhole instrument multifunctional communication control system |
-
2010
- 2010-12-15 CN CN2010206611966U patent/CN201953377U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536214A (en) * | 2010-12-15 | 2012-07-04 | 常州凯锐自动化控制设备有限公司 | Signal transmission equipment for coal-bed gas well detection signals |
| CN106761711A (en) * | 2016-12-26 | 2017-05-31 | 中石化江汉石油工程有限公司 | A kind of downhole instrument multifunctional communication control system |
| CN106761711B (en) * | 2016-12-26 | 2024-02-02 | 中石化江汉石油工程有限公司 | Multifunctional communication control system for downhole instrument |
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| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20110831 Termination date: 20111215 |