CN203951465U - Underground Electromagnetic Waves transmitter - Google Patents
Underground Electromagnetic Waves transmitter Download PDFInfo
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- CN203951465U CN203951465U CN201420357427.2U CN201420357427U CN203951465U CN 203951465 U CN203951465 U CN 203951465U CN 201420357427 U CN201420357427 U CN 201420357427U CN 203951465 U CN203951465 U CN 203951465U
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Abstract
The utility model relates to a kind of Underground Electromagnetic Waves transmitter, comprising: power supply is each part power supply of this transmitter; Transducer, measures underground pipeline information, at least comprises azimuth, the angle of pitch, roll angle, displacement parameter; Waveform changing circuit, is converted to sine wave by the measurement result of transducer by square wave; Passive crystal oscillator, generates very low frequency signal; Frequency mixer, modulates the very low frequency signal of passive crystal oscillator output with the sine wave of waveform changing circuit output, produce modulating wave; Signal one-level amplifier, carries out one-level amplification to modulating wave; Signal power amplifier, the modulating wave after one-level is amplified carries out power amplification; Magnetic antenna, is comprised of bar magnet and the coil being wrapped on bar magnet, and the modulating wave after power amplification is launched; The length of described bar magnet is 30cm, and diameter is 10cm, and it is 0.1cm copper wire winding that coil adopts diameter, and being wound around the number of turn is 80 circles.The application has improved transmitting power, has therefore greatly promoted transmitting range and the degree of depth.
Description
Technical field
The application relates to a kind of underground piping plotting board of non-excavation type.
Background technology
In city and rural underground, be thick with the pipelines such as electric power, feedwater, draining, combustion gas, heating power, communication.These underground pipings belong to not commensurate's construction and management, and building time has early to be had lately, and some is still in use and some is discarded.For the object of building urban underground space, be necessary thoroughly to understand the distribution situation of all kinds of underground pipings.
The underground piping plotting board of existing non-excavation type comprises horizontal directional drilling position indicator (also claiming guide instrument), geological radar, the pipe and cable detector based on electromagnetic induction etc.These devices are easily subject to the impact of tested pipeline buried depth, and buried depth of pipeline is larger, and certainty of measurement is lower, are not therefore suitable for the accurate mapping of underground piping.
The existing horizontal directional drilling guide instrument of take is example, and it mainly comprises transmitter and receiver.Transmitter moves in underground piping, which is provided with multiple sensors, and the measurement results such as the inclination angle collecting, position, temperature are passed to ground receiver with wireless program request form.Receiver is determined the track of underground piping thus.
Utility model content
The application's technical problem to be solved is to provide the transmitter in a kind of underground piping plotting board of non-excavation type, can adopt optimal power emitting electromagnetic wave.
For solving the problems of the technologies described above, the application's Underground Electromagnetic Waves transmitter comprises:
---power supply is each part power supply of this transmitter;
---transducer, measure underground pipeline information, at least comprise azimuth, the angle of pitch, roll angle, displacement parameter;
---waveform changing circuit, is converted to sine wave by the measurement result of transducer by square wave;
---passive crystal oscillator, generates very low frequency signal;
---frequency mixer, with the sine wave of waveform changing circuit output, modulate the very low frequency signal of passive crystal oscillator output, produce modulating wave;
---signal one-level amplifier, carries out one-level amplification to modulating wave;
---signal power amplifier, the modulating wave after one-level is amplified carries out power amplification;
---magnetic antenna, by bar magnet and the coil being wrapped on bar magnet, formed, the modulating wave after power amplification is launched;
The length of described bar magnet is 30cm, and diameter is 10cm, and it is 0.1cm copper wire winding that coil adopts diameter, and being wound around the number of turn is 80 circles.
Further, described bar magnet is ferrite bar.
Compare with traditional Underground Electromagnetic Waves transmitter, the application, by magnetic antenna being adopted to the parameter of repeatedly optimizing through test of many times, makes its transmitting power compare and promote 3～5 times with existing product, has therefore greatly promoted transmitting range and the degree of depth.The application adopts VLF-EM ripple to transmit, and earth penetrating ability is strong, and signal attenuation is little, little to the interference of ambient signals, is applicable to the mapping to underground piping.
Accompanying drawing explanation
Fig. 1 is the structural representation of the application's Underground Electromagnetic Waves transmitter;
Fig. 2 is the schematic diagram of the course of work of the application's Underground Electromagnetic Waves transmitter.
Description of reference numerals in figure:
10 is power supply; 11 is transducer; 12 is waveform changing circuit; 13 is passive crystal oscillator; 14 is frequency mixer; 15 is signal one-level amplifier; 16 is signal power amplifier; 17 is magnetic antenna; 171 is bar magnet; 172 is coil.
Embodiment
Refer to Fig. 1, the application's Underground Electromagnetic Waves transmitter comprises power supply 10, transducer 11, waveform changing circuit 12, passive crystal oscillator 13, frequency mixer 14, signal one-level amplifier 15, signal power amplifier 16, magnetic antenna 17.These parts are all surrounded by shell (not shown), to protect.For avoiding that electromagnetic wave is produced and disturbed, described shell is such as adopting nylon material etc.
Each part power supply that described power supply 10 is transmitter, for example, adopt rechargeable lithium battary.Described transducer 11 is measured underground pipeline information, parameters such as azimuth, the angle of pitch, roll angle, displacement.
Refer to Fig. 2, this is the course of work of the application's Underground Electromagnetic Waves transmitter.The measurement result of described transducer 11 is generally square wave.Described waveform changing circuit 12 adopts electric capacity and inductance, and this square wave is converted to sine wave, is preferably converted to symmetrical sine wave (crest is contrary with the amplitude equidirectional of trough).Described waveform changing circuit 12 can be integrated in an integrated circuit (IC) chip, is called waveform transformation chip.Described passive crystal oscillator 13 produces a very low frequency signal, the signal that frequency is 3kHz～30kHz.Described frequency mixer 14 is modulated the very low frequency signal of passive crystal oscillator 13 outputs with the sine wave of waveform changing circuit 12 outputs, just comprised the metrical information of transducer 11 in formed modulating wave.
Modulating wave carries out one-level amplification through signal one-level amplifier 15, then recommends amplification through signal power amplifier 16, improves its load capacity high-power to add.Modulating wave after power amplification is launched by magnetic antenna 17.Described magnetic antenna 17 by bar magnet 171, be wrapped in coil on bar magnet 171 172 altogether two parts form.Bar magnet 171 for example adopts ferrite bar.
By the size (draw ratio) of bar magnet 171 in adjusting,, the number of turn of coil 172 and the copper wire diameter that forms coil 172, can reach the optimal power of VLF-EM ripple transmitting.Under optimal power, the transmission range of VLF-EM ripple farthest.Preferably, the length of described bar magnet 171 is 30cm, and diameter is 10cm, and it is 0.1cm copper wire winding that coil 172 adopts diameter, and being wound around the number of turn is 80 circles, and these parameters can reach the optimal power of VLF-EM ripple transmitting.
The application's Underground Electromagnetic Waves transmitter, when practical application, moves to the other end from one end of tested underground piping, for example, by rope, pull.In the process of motion, this transmitter is launched with optimal transmit power the measurement result of transducer all the time by the form of VLF-EM ripple, and ground receiver is learnt the three-dimensional structure of tested underground piping thus.
These are only the application's preferred embodiment, and be not used in restriction the application.For a person skilled in the art, the application can have various modifications and variations.All within the application's spirit and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in the application's protection range.
Claims (2)
1. a Underground Electromagnetic Waves transmitter, is characterized in that, comprising:
---power supply is each part power supply of this transmitter;
---transducer, measure underground pipeline information, at least comprise azimuth, the angle of pitch, roll angle, displacement parameter;
---waveform changing circuit, is converted to sine wave by the measurement result of transducer by square wave;
---passive crystal oscillator, generates very low frequency signal;
---frequency mixer, with the sine wave of waveform changing circuit output, modulate the very low frequency signal of passive crystal oscillator output, produce modulating wave;
---signal one-level amplifier, carries out one-level amplification to modulating wave;
---signal power amplifier, the modulating wave after one-level is amplified carries out power amplification;
---magnetic antenna, by bar magnet and the coil being wrapped on bar magnet, formed, the modulating wave after power amplification is launched;
The length of described bar magnet is 30cm, and diameter is 10cm, and it is 0.1cm copper wire winding that coil adopts diameter, and being wound around the number of turn is 80 circles.
2. Underground Electromagnetic Waves transmitter according to claim 1, is characterized in that, described bar magnet is ferrite bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420357427.2U CN203951465U (en) | 2014-06-30 | 2014-06-30 | Underground Electromagnetic Waves transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420357427.2U CN203951465U (en) | 2014-06-30 | 2014-06-30 | Underground Electromagnetic Waves transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203951465U true CN203951465U (en) | 2014-11-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420357427.2U Expired - Fee Related CN203951465U (en) | 2014-06-30 | 2014-06-30 | Underground Electromagnetic Waves transmitter |
Country Status (1)
| Country | Link |
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| CN (1) | CN203951465U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105241452A (en) * | 2015-08-28 | 2016-01-13 | 上海电力设计院有限公司 | Trenchless calandria three-dimensional track optimization measurement method based on positioning induction device |
-
2014
- 2014-06-30 CN CN201420357427.2U patent/CN203951465U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105241452A (en) * | 2015-08-28 | 2016-01-13 | 上海电力设计院有限公司 | Trenchless calandria three-dimensional track optimization measurement method based on positioning induction device |
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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: 20141119 Termination date: 20170630 |