CN204905415U - Active ground of integral type electric dipole antenna - Google Patents
Active ground of integral type electric dipole antenna Download PDFInfo
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- CN204905415U CN204905415U CN201520507782.8U CN201520507782U CN204905415U CN 204905415 U CN204905415 U CN 204905415U CN 201520507782 U CN201520507782 U CN 201520507782U CN 204905415 U CN204905415 U CN 204905415U
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- external member
- antenna
- signal amplification
- amplification circuit
- assembly interface
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Abstract
The utility model provides an active ground of integral type electric dipole antenna contains telluric electricity field, encapsulation external member, circuit module and assembly interface, wherein, telluric electricity field is metal or graphite material's tubular product, one end opening and inside hollow steel pipe are sealed for one end to the encapsulation external member, and the inside of encapsulation external member is equipped with and is used for U type groove, circuit module is faint signal amplification circuit board, and its circumference links firmly U type frame, be equipped with circuit board pilot hole on the U type frame, telluric electricity field connects in the one end of encapsulation external member, assemble the other end of interface connection in the encapsulation external member, faint signal amplification circuit board passes through the pilot hole install in U type inslot, faint signal amplification circuit board pass through the soft arranging wire and link to each other with inside joint of assembly interface, and the assembly interface external interface link to each other with the feeder cable. Utilize the utility model discloses the antenna can reduce outside interfering signal to the interference of antenna signal in the feeder transmission course.
Description
Technical field
The utility model relates to a kind of active antenna, is specifically related to a kind of integral active electrical dipole antenna thoroughly, belongs to underground wireless communication antenna technical field.
Background technology
In current field underground wireless communication, electrical dipole antenna lays simply because having, antenna size is little, overcome the advantages such as traditional antenna radiation efficiency is low, is widely used in the underground wireless communication field of earth penetrating.In underground wireless communication field, main use electrical dipole antenna realizes the radio communication of earth penetrating, rock stratum, as colliery, subway, mine, culvert etc., transmission of digital short message, voice signal and video pictures information, ensure daily communication scheduling and emergency management and rescue communication etc.The general principle of its communication is the transmission receiving function that the electrical potential difference responded to by contacting good electrical dipole antenna two ends with stratum realizes signal.
In mining area surface or mine laneway, environment is comparatively severe, frequently can pass through as the locomotive of power supply by useful direct current 120V in tunnel, locomotive has larger transient current at operating instant and pours in the earth, electrical dipole antenna can induce the transient pulse voltage of higher amplitude, thus causes receiver cisco unity malfunction; Receiver needs the feeder line of tens meters to carry out reception antenna small-signal simultaneously, and aerial signal is vulnerable to the interference of external electromagnetic field, only has the performance of carrying out reasonably amplifying process guarantee receiver to antenna small-signal.At present in traditional through the earth communication test, the electrode of paired steel pipe or graphite material is driven underground, 20-40 rice (specifically according to the restriction of site condition) is spaced apart between electrode, contact with stratum or lithosphere well, direct connection feeder line, realizes the function of electrical dipole antenna.This mode is comparatively simple, be convenient to building of experimental condition, but antenna mode is comparatively simple, signal transmission is easily interfered, the impact of hard pulse voltage can not be suppressed, and the antenna ground resistance of this mode larger change can occur because of the difference of geological conditions, receiver front end circuit needs to configure according to diverse geographic location the change that different circuit implementations adapts to antenna ground resistance.Receiver application does not have generality, needs for the different receiver front end treatment circuit of Different Strata structural design.
Utility model content
In view of this, the utility model provides a kind of integral active electrical dipole antenna thoroughly, weak signal amplification circuit plate is connected with grounding electrode by package assembling by this antenna, form the combined antenna of integration, the signal being linked into feeder is amplified to set point through weak signal amplification circuit plate, thus reduces external interference signals to the interference of aerial signal in feeder line transmitting procedure.
Realize the technical solution of the utility model as follows:
A kind of integral active electrical dipole antenna thoroughly, comprises grounding electrode, encapsulation external member, circuit module and Assembly interface; Wherein, described grounding electrode is the tubing of metal or graphite material; Described encapsulation external member is that one end open is closed and the steel pipe of inner hollow in one end, and the inside of encapsulation external member is provided with for U-type groove; Described circuit module is weak signal amplification circuit plate, and its circumference is connected U-shaped frame, and described U-shaped frame is provided with circuit board pilot hole;
Described grounding electrode is connected to one end of encapsulation external member, and described Assembly interface is connected to the other end of encapsulation external member; Described weak signal amplification circuit plate is installed in described U-type groove by described pilot hole, and weak signal amplification circuit plate is connected with Assembly interface internal connection by soft arranging wire, and Assembly interface external interface is connected with feeder cable.
As a kind of optimal way of the present utility model, described pilot hole is connected with draw-in groove spring leaf, and is contacted well with encapsulation external member by spring leaf, thus ensures the transmission of signal.
As a kind of optimal way of the present utility model, described Assembly interface one end configuration helicitic texture, the bottom of thread is furnished with watertight rubber washer simultaneously, is connected with encapsulation external member by helicitic texture, described Assembly interface other end configuration watertight connector, is used for being connected with feeder cable.
As a kind of optimal way of the present utility model, described antenna also comprises the impedance be connected with weak signal amplification circuit plate and selects module, the change of the antenna ground impedance that weak signal amplification circuit plate selects the structural change of module adaptive Different Strata to cause by the impedance of front end, has stronger environmental suitability.
As a kind of optimal way of the present utility model, described weak signal amplification circuit plate is provided with clipping module, suppresses for moment hard pulse voltage signal.
Beneficial effect:
(1) by split type assembly structure, grounding electrode, encapsulation external member and Assembly interface are compounded with source antenna by what link into an integrated entity, make antenna have stronger environmental suitability.
(2) encapsulating external member can adopt 3D printing to process, and integrated molding, ensures its structural strength and pressure-resistant seal effect.
(3) weak signal amplification circuit edges of boards frame is connected with spring leaf by screw, is fixed in the U groove of encapsulation external member, is convenient to dismounting and the replacing of circuit board.
(4) change of the weak signal amplification circuit plate antenna ground impedance of selecting the structural change of module adaptive Different Strata to cause by the impedance of front end, has stronger environmental suitability.
(5) Assembly interface adopts the corrosion-resistant joint of watertight, ensures effectively to prevent the fail safe that feeder cable connects antenna by the corrosion on stratum, bring the change of antenna ground impedance simultaneously when avoiding feeder cable holding wire to contact with stratum.
Accompanying drawing explanation
Fig. 1 is integral type active ground electrical dipole antenna schematic diagram;
Fig. 2 is encapsulation external member schematic diagram;
Fig. 3 is Weak Signal Processing board structure of circuit schematic diagram;
Fig. 4 is that Weak Signal Processing circuit board and card spring assemble schematic diagram;
Fig. 5 is feeder cable structural representation;
Fig. 6 is Assembly interface schematic diagram;
Fig. 7 is discharge circuit impedance schematic diagram;
Fig. 8 is Weak Signal Processing circuit function module schematic diagram;
Wherein: 1-grounding electrode, 2-encapsulate external member, 3-Assembly interface, 4-screw thread, 5-screw thread, 6-U type groove, the U-shaped frame of 7-circuit board, 8-circuit board pilot hole, 9-card spring, 10-nut, 11-bolt, 12-feeder cable insulating barrier, 13-feeder cable screen, 14-signal cable insulating barrier, 15-signal cable screen, 16-signal cable transmission line, 17-Assembly interface, 18 feeder cables and 19 weak signal amplification circuit plates.
Embodiment
To develop simultaneously embodiment below in conjunction with accompanying drawing, the utility model is described in detail.
The present embodiment provides a kind of integral active electrical dipole antenna thoroughly applying to wireless through the earth communication field, the grounding electrode of this antenna, encapsulation external member, weak signal amplification circuit plate and the separable dismounting of Assembly interface and replacing, thus be convenient to the different geographical environment of antenna adaptation and arrangement space.
As shown in Figure 1, the utility model integral active thoroughly electrical dipole antenna comprise grounding electrode 1, encapsulation external member 2 and Assembly interface 3.Wherein grounding electrode 1 is length 1-1.5 rice, diameter is steel pipe or the graphite pipe of 50mm, encapsulation external member 2 is for closing one end open in one end, the steel pipe of inner hollow, two ends arrange screw thread 4 and screw thread 5 interface respectively, inside arranges the U-type groove 6 can fixing weak signal amplification circuit plate simultaneously, as shown in Figure 2.This steel pipe can adopt 3D printing technique time processing shaping, and U-type groove 6 can be held weak signal amplification circuit plate 19 and inserts and fix, and to ensure its structural strength, makes it possess impact and withstand voltage properties simultaneously.
The circumference of weak signal amplification circuit plate 19 is connected U-shaped frame 7, and described U-shaped frame 7 is provided with circuit board pilot hole 8, as shown in Figure 3.By described pilot hole 8, card spring 9 utilizes bolt 11 and nut 10 itself and weak signal amplification circuit plate to be fixed together, as shown in Figure 4.In order to ensure the turn-on effect that signal is good, U-shaped frame 7 herein, circuit board pilot hole 8, card spring 9, nut 10 and bolt 11 adopt craft of gilding.The signal of weak signal amplification circuit plate 19 is connected with Assembly interface 3 internal connection by soft arranging wire, and Assembly interface 3 external interface is connected with feeder cable 18, forms integration active ground electrical dipole antenna as shown in Figure 1.
Feeder cable 18 comprises 3 groups of signals, be respectively aerial signal, aerial signal in analog, control signal, control signal ground, power supply and power supply ground.Feeder cable 18 internal structure as shown in Figure 5, comprise peripheral feeder cable insulating barrier 12, feeder cable screen 13, inner three groups of signal cables adopt double-decker to comprise signal cable insulating barrier 14, signal cable screen 15 and inner most signal cable transmission line.Reduced by multilayer screen and crosstalk between the interference of isolating exterior electromagnetic field and different signal transmission.Feeder cable realizes the transfer function of signal by Assembly interface, as shown in Figure 6.
Spacing is 20-40 rice a pair integrated active electrical dipole antenna due to after stratum electric field change induces electrical potential difference, signal is transferred to weak signal amplification circuit plate 19 by the encapsulation inner U-type groove 6 of external member 2 and card spring as conductor by grounding electrode, after being amplified to certain limit value, be transferred to receiver front end treatment circuit by feeder cable.
The impedance of earthing electrical double pole antenna can have greatly changed with the difference of geology, and weak signal amplification circuit front edge of board needs to increase impedance and adapts to module to adapt to the requirement of different impedance ground to processing of circuit.Affect earthing electrical double pole antenna impedance many factors, consist predominantly of the conductivity, communication frequency, strata structure etc. of pole plate size, pole length, pole sectional area, propagation medium.
Can there is moment hard pulse voltage signal in environment residing for antenna, the utility model needed to add the beneficial effect that amplitude limiter circuit module realizes the suppression to hard pulse signal before circuit pre-amplification module, reduced the impact on rear class amplifying circuit.The equiva lent impedance Z of this amplitude limiter circuit module
l:
Z
lthe requirement of pre-amplification module to prime input impedance need be met.
As shown in Figure 7, R
santenna ground impedance, C
tand R
tbe equivalent inpnt capacitive reactance and the impedance of amplitude limiter circuit module respectively, the input impedance of amplifier A is Z
in, discharge circuit voltage gain is G; Discharge circuit input impedance is Z;
By antenna ground resistance R
swith the equivalent input capacitance C of amplitude limiter circuit module
twith impedance R
tregard one as, then antenna equivalence impedance ground Z
a.
The signal to noise ratio S/N of weak signal amplification circuit plate 19 is by discharge circuit input impedance Z and antenna equivalence impedance ground Z
adetermine.When antenna senses that signal strength signal intensity is U, according to voltage divider principle, the input signal strength of discharge circuit is U
in.
Work as Z
a/ Z is less, and when inputting U mono-stable condition, the input signal strength of discharge circuit is U
inlarger.Due to R
saffect by the factor such as earth formation and conductivity, need to reduce the equiva lent impedance in amplitude limiter circuit module.Owing to adopting very low frequency frequency range in saturating ground wireless communication, equivalent input capacitance C here
tcapacitive reactance negligible.Therefore antenna equivalence impedance ground Z
acan be reduced to: Z
a=R
s+ R
t.In design consideration, this reduces the impedance R of amplitude limiter circuit
t, effectively can strengthen input signal strength.
The utility model weak signal amplification circuit front end signal processing module, by arranging the module of mating different antennae impedance ground, realizes front end processing block and has higher signal to noise ratio S/N.According to antenna equivalence impedance ground Z
adifferent resistance values select different pre-amplification modules 1 and pre-amplification module 2.The selection of pre-amplification module is realized by control module.Due to antenna equivalence impedance ground Z
adifferent the sensitivity of input noise in circuit can be caused to affect element change, difference between pre-amplification module is that pre-amplification circuit module is on the different responsive adaptation affecting element of input noise N, improve front end processing block signal to noise ratio S/N by the switching of module, reach the beneficial effect of signal transacting.
The composition frame chart of weak signal amplification circuit plate 19 as shown in Figure 8, wherein AGC module realizes the adjustment to signal strength signal intensity gain, by predetermined reference voltage mode, realize signal and be amplified to set point, in circuit module, predeterminated voltage detects interface simultaneously, can realize the closed-loop control of voltage detecting and gain according to actual needs.Hold in front of the receiver and realize a pair grounding electrode reference level one by feeder cable and to make peace the beneficial effect of receiver front end processing signals to the requirement of differential signal amplitude.
In sum, these are only preferred embodiment of the present utility model, be not intended to limit protection range of the present utility model.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (5)
1. an integral active electrical dipole antenna thoroughly, is characterized in that, comprises grounding electrode (1), encapsulation external member (2), circuit module and Assembly interface (3); Wherein, described grounding electrode (1) tubing that is metal or graphite material; Described encapsulation external member (2) is for closing one end open and the steel pipe of inner hollow in one end, and the inside of encapsulation external member (2) is provided with U-type groove (6); Described circuit module is weak signal amplification circuit plate (19), and its circumference is connected U-shaped frame (7), and described U-shaped frame (7) is provided with circuit board pilot hole (8);
Described grounding electrode (1) is connected to one end of encapsulation external member (2), and described Assembly interface (3) is connected to the other end of encapsulation external member (2); Described weak signal amplification circuit plate (19) is installed in described U-type groove (6) by described circuit board pilot hole, weak signal amplification circuit plate (19) is connected with Assembly interface (3) internal connection by soft arranging wire, and Assembly interface (3) external interface is connected with feeder cable (18).
2. integral active electrical dipole antenna thoroughly according to claim 1, it is characterized in that, described circuit board pilot hole is connected with draw-in groove spring leaf, and is contacted well with encapsulation external member (2) by spring leaf.
3. integral active electrical dipole antenna thoroughly according to claim 1, it is characterized in that, described Assembly interface (3) one end configuration helicitic texture, the bottom of thread is furnished with watertight rubber washer simultaneously, be connected with encapsulation external member (2) by helicitic texture, described Assembly interface (3) other end configuration watertight connector, is used for being connected with feeder cable (18).
4. integral active electrical dipole antenna thoroughly according to claim 1, it is characterized in that, described antenna also comprises the impedance be connected with weak signal amplification circuit plate (19) and selects module.
5. integral active electrical dipole antenna thoroughly according to claim 1, it is characterized in that, described weak signal amplification circuit plate (19) is provided with clipping module, suppresses for moment hard pulse voltage signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520507782.8U CN204905415U (en) | 2015-07-14 | 2015-07-14 | Active ground of integral type electric dipole antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520507782.8U CN204905415U (en) | 2015-07-14 | 2015-07-14 | Active ground of integral type electric dipole antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204905415U true CN204905415U (en) | 2015-12-23 |
Family
ID=54927570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520507782.8U Expired - Fee Related CN204905415U (en) | 2015-07-14 | 2015-07-14 | Active ground of integral type electric dipole antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204905415U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114245633A (en) * | 2021-11-30 | 2022-03-25 | 中航光电科技股份有限公司 | Airtight packaging structure of multichannel digital optical module and ceramic circuit board |
| CN114300834A (en) * | 2022-01-06 | 2022-04-08 | 北京航空航天大学 | Mining miniaturized low-frequency emergency transmission node based on shape memory structure |
-
2015
- 2015-07-14 CN CN201520507782.8U patent/CN204905415U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114245633A (en) * | 2021-11-30 | 2022-03-25 | 中航光电科技股份有限公司 | Airtight packaging structure of multichannel digital optical module and ceramic circuit board |
| CN114300834A (en) * | 2022-01-06 | 2022-04-08 | 北京航空航天大学 | Mining miniaturized low-frequency emergency transmission node based on shape memory structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151223 Termination date: 20160714 |