CN102129088A - Ground detector transmitter - Google Patents
Ground detector transmitter Download PDFInfo
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- CN102129088A CN102129088A CN 201010618852 CN201010618852A CN102129088A CN 102129088 A CN102129088 A CN 102129088A CN 201010618852 CN201010618852 CN 201010618852 CN 201010618852 A CN201010618852 A CN 201010618852A CN 102129088 A CN102129088 A CN 102129088A
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Abstract
The invention discloses a ground detector transmitter, which comprises a power supply, a main control circuit, a digital/analogue (D/A) conversion circuit, a transmitting circuit and a monitoring circuit, wherein the main control circuit is a singlechip; the monitoring circuit comprises a sampling circuit; the transmitting circuit comprises a bridge circuit, an isolation circuit and a transmitting antenna circuit; the isolation circuit is connected with the main control circuit; and the D/A conversion circuit is connected with the main control circuit. The ground detector transmitter is characterized in that: a switching circuit is arranged in the transmitting circuit; the control end of the switching circuit is connected with the output end of the control circuit; the input end of the control circuit is connected with the D/A conversion circuit; the input end of the switching circuit is connected with the output end of the bridge circuit; the output end of the switching circuit is connected with the sampling circuit; and each arm of the bridge circuit is provided with an isolated gate bipolar transistor which is connected in parallel with the original isolated gate bipolar transistor. The ground detector transmitter has the advantages of short switch-off time, high transmitting current, high measurement depth, complete monitoring function, high integration degree and light weight.
Description
Technical field
The present invention relates to the transient electromagnetic detecting technology, be specially a kind of spy ground instrument transmitter.
Background technology
The transient electromagnetic detecting method is a kind of of inductive electromagnetic probe method.The principle of transient electromagnetic detecting is: the transient electrical magnetic wave is subjected to the decay of different medium in each stratum in the process of underground propagation, and different medium is different to the transient electromagnetic wave attenuation value of different frequency.As long as extract in the echoed signal characteristic frequency spectrum, just can be finally inversed by different material in the stratum corresponding to the transient electromagnetic signal of Different Strata material.
Transient electromagnetic detecting is obtaining using more and more widely aspect environmental protection, hydrogeology and engineering geology, the energy and the mining industry exploration.
The standard direct relation stable and waveform of the amplitude of the transient electrical magnetic wave that the transient electromagnetic device is launched the accuracy of result of detection, and Fa She intensity is also determining the degree of depth of detection in addition.Existing spy ground its composition of instrument transmitter comprises power supply, governor circuit, D/A converting circuit, radiating circuit, partly forms from control circuit, observation circuit and ripple synchronous signal circuit etc., and the form that governor circuit passes through bus is connected with above-mentioned circuit respectively.
Governor circuit is single-chip microcomputer (MCU), is mainly used to control the bipolarity square wave that radiating circuit produces certain frequency, by monitoring modular the state of dutycycle, waveform voltage size of current and the waveform of this square wave is monitored simultaneously; Governor circuit is also realized man-machine interaction to carry out exchanges data from control circuit in addition.Governor circuit mainly is to choose different current values according to the degree of depth of surveying to the control of radiating circuit, and this current value is imported by button by operating personnel, and the length of the emitting antenna of choosing is determined.
Radiating circuit is the core that transmitter improves waveform, is mainly driven by 4 insulated gate bipolar transistors by drive signal synchronous with receiver and that governor circuit sends and forms full-bridge circuit, uses this circuit can realize the output of bipolarity square wave.Transmitter current generates electromagnetic waves to underground emission by transmitting coil.
From control circuit by CPLD (CPLD) as control chip, operating personnel can regulate to reach the optimum transmit waveform to the transmitter current size and to emitting antenna length by this circuit; The length of the voltage swing of battery, transmitter current size and antenna can both show by the display screen in display circuit in real time.
Observation circuit is mainly monitored transmitter current and waveform, mainly is made up of waveform state observation circuit and size of current observation circuit.Because the degree of depth of surveying and transmitter current is big or small proportional, therefore be necessary transmitter current is monitored; The monitoring transmitter current has two effects: the one, realize overcurrent protection; The 2nd, for battery-driven transmitter, in the process of using, the voltage of battery will reduce gradually, and transmitter current also will decrease, and accurately detect transmitter current at any time and can guarantee inversion accuracy of result.In order accurately to detect transmitter current at any time, be connected to current monitoring circuit in the observation circuit, this circuit is sampled to transmitter current by sample circuit, and the current signal that collects is changed by analog to digital conversion circuit, its current conversion value is sent into governor circuit, processor compares sampled value and current-programmed value, and the size of current of adjusting the radiating circuit emission reaches setting value, to guarantee the stable of transmitter current.In addition, set flow valuve when current detection value surpasses, governor circuit will turn-off radiating circuit, with protection system.Display in the display circuit shows the correlation parameter of transmitter current.
In the prior art, mainly be the bipolarity square wave electric current that produces certain frequency by bridge circuit and constant-current source circuit, the bipolarity square wave electric current of the certain frequency that emits through emitting antenna to underground transmission electromagnetic wave.Because the transmitting coil in the emitting antenna is an inductive load, switching tube shutdown moment, the electric current in the inductance are index law and descend, and making behind the transmitter current influence early signal detection along also being exponential damping; In addition, for the transmitter that uses accumulator as the power supply power supply, in the process of using, the voltage of accumulator will reduce gradually, and transmitter current also will decrease, and these all can impact echoed signal, the inversion accuracy of result processing stage of obstruction.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, and provide a kind of turn-off time short, transmitter current is big, it is dark to fathom, monitoring function is complete and integrated level height, lightweight spy ground instrument transmitter.
The objective of the invention is to realize by following technical scheme:
A kind of spy ground instrument transmitter, comprise power supply, governor circuit, D/A converting circuit, radiating circuit, from control circuit, observation circuit and ripple synchronous signal circuit, wherein governor circuit is a single-chip microcomputer, observation circuit comprises sample circuit, radiating circuit comprises bridge circuit, buffer circuit and emitting antenna circuit, buffer circuit is connected with governor circuit, and D/A converting circuit is connected with governor circuit, unlike the prior art be:
Set up on-off circuit in the radiating circuit, the control end of described on-off circuit is connected with the output terminal of control circuit, the input end of control circuit is connected with D/A converting circuit, the input end of on-off circuit is connected with the output terminal of bridge circuit, the output terminal of on-off circuit is connected with sample circuit, set up igbt respectively on each arm of bridge circuit, in parallel with original igbt.
Described on-off circuit mainly is made up of igbt; the collector of igbt is connected with the output terminal of bridge circuit; the emitter of igbt is connected with sample circuit; the gate pole of igbt is connected with the output terminal of control circuit; the emitter of igbt and collector are in series with energy feedback buffer circuit, and gate pole and emitter are in series with the switch protection circuit.
Described energy feedback buffer circuit comprises resistance, electric capacity and diode, by resistance with form with capacitances in series after diode is in parallel.
Described switch protection circuit comprises two fast recovery diodes, is composed in series by the pole reversal of two fast recovery diodes.
The quantity of the igbt of setting up respectively on described each arm is 2.
Set up the dutycycle observation circuit in the observation circuit, the detection input end of described dutycycle observation circuit is connected with sample circuit, and output terminal is connected with governor circuit.
Set up the waveform voltage observation circuit in the observation circuit, the detection input end of described waveform voltage observation circuit is connected with sample circuit, and output terminal is connected with governor circuit.
Set up supply voltage monitoring circuit in the observation circuit, the detection input end of described supply voltage monitoring circuit is connected with power supply, and output terminal is connected with governor circuit.
The invention has the advantages that:
1, governor circuit can provide strength of current the transmitter current different with frequency according to the current value size of operating personnel input thereby produce programmable power supply voltage, selects different brackets for use according to the difference that fathoms, adapts to shallow, in, the exploration of different depth deeply; Owing to set up igbt respectively on each arm of bridge circuit, so the transmitter current maximum can reach 200A, is better than maximum current 50A in the present like product;
2, owing to adopted igbt to form full-bridge circuit as electronic switch, and be connected to fast recovery diode and discharge the loop for reactive power provides, the quadergy that load inductance is stored feeds back to DC side, thereby has improved edge behind the transmitter current waveform; In addition, system also monitors in real time parameters such as the electric current and voltage size of transmitter current and dutycycles and feeds back to governor circuit and handles, thereby makes the pulse waveform trend standard rectangular ripple of transmitter current, the accuracy that has improved inversion result greatly;
3, set up supply voltage monitoring circuit, can monitor power source voltage immediately, in order to avoid the variable effect transmitter current of supply voltage is stable;
4, the integrated level height is in light weight, also can adopt small-sized transmitting coil, can adopt backpack to survey in the down-hole.
Description of drawings
Fig. 1 connects block diagram for the embodiment radiating circuit;
Fig. 2 is the electrical schematic diagram of embodiment bridge circuit and on-off circuit;
Fig. 3 connects block diagram for the embodiment observation circuit.
Embodiment
Below in conjunction with drawings and Examples content of the present invention is elaborated, but is not limitation of the invention.
Embodiment:
With reference to Fig. 1 Fig. 2, a kind of spy ground instrument transmitter, comprise power supply 15, governor circuit 1, D/A converting circuit 2, radiating circuit 10 and observation circuit, wherein governor circuit 1 is a single-chip microcomputer, observation circuit comprises sample circuit 7, and radiating circuit 10 comprises bridge circuit 5, buffer circuit 4 and emitting antenna 6 circuit, and buffer circuit 4 is connected with governor circuit 1, D/A converting circuit 2 is connected with governor circuit 1
Set up on-off circuit 8 in the radiating circuit 10, the control end of on-off circuit 8 is connected with the output terminal of control circuit 3, the input end of control circuit 3 is connected with D/A converting circuit 2, the input end of on-off circuit 8 is connected with the output terminal of bridge circuit 5, the output terminal of on-off circuit 8 is connected with sample circuit 7, shown in Fig. 2 circuit diagram, set up igbt respectively on each arm of bridge circuit 5, with original igbt Q1, Q2, Q3, the Q4 parallel connection, the quantity of the igbt of setting up on each arm is 2, the igbt Q5 that sets up, Q6 is in parallel with original igbt Q1, the igbt Q9 that sets up, Q10 is in parallel with original igbt Q2, the igbt Q7 that sets up, Q8 is in parallel with original igbt Q3, the igbt Q11 that sets up, Q12 is in parallel with original igbt Q4.Emitting antenna 6 is connected with the two ends of the output terminal resistance R 3 of bridge circuit 5, and diode D1 is connected with power supply 15, and resistance R 1, R2, R4, R5 are the input end of bridge circuit 5, is connected with buffer circuit 4.
With reference to Fig. 1 Fig. 2; on-off circuit 8 mainly is made up of igbt Q13; the collector of igbt Q13 is connected with the output terminal of bridge circuit 5; the emitter of igbt Q13 is connected with sample circuit R11; the gate pole of igbt Q13 is connected with the output terminal resistance R 8 of control circuit 3; the emitter of igbt Q13 and collector are in series with energy feedback buffer circuit, and gate pole and emitter are in series with switch protection circuit 9.Control circuit 3 comprises operational amplifier U1, resistance R 7, R8, R9, R10 and capacitor C 2, and the input pickup resistance R7 of control circuit 3 is connected with governor circuit 1 by D/A converting circuit 2.
Energy feedback buffer circuit comprises resistance R 6, capacitor C 1 and diode D2, by resistance R 6 be composed in series with capacitor C 1 after diode D2 is in parallel.
The control of 1 pair of radiating circuit 10 of governor circuit mainly is to choose different current values according to the degree of depth of surveying, this current value is imported by button by operating personnel, and the length of the emitting antenna of choosing 6, produce program control signal through data processing, this signal generates a reference voltage signal behind D/A converting circuit 2, the aperture size of regulating insulated gate bipolar transistor Q13 switching tube by this signal, thus the transmitter current size regulated.
With reference to Fig. 3, original waveform state observation circuit 11 connects radiating circuit 10 and governor circuit 1 in the observation circuit, and current monitoring circuit 12 connects sample circuit 7 and governor circuit 1, and sample circuit 7 is connected with radiating circuit 10.
Set up dutycycle observation circuit 14 in the observation circuit, the detection input end of dutycycle observation circuit 14 is connected with sample circuit 7, and output terminal is connected with governor circuit 1.
Set up waveform voltage observation circuit 13 in the observation circuit, the detection input end of waveform voltage observation circuit 13 is connected with sample circuit 7, and output terminal is connected with governor circuit 1.
Waveform voltage observation circuit 13 and dutycycle observation circuit 14 mainly are that the magnitude of voltage for the pulse waveform that guarantees to launch maintains within the scope that radiating circuit 10 allowed, when the periodicity that guarantees the waveform emission is carried out signals collecting with receiver synchronously.
Set up supply voltage monitoring circuit 16 in the observation circuit, the detection input end of supply voltage monitoring circuit 16 is connected with power supply 15, and output terminal is connected with governor circuit 1.Supply voltage monitoring circuit has mainly adopted the analogue value with supply voltage to be converted into the accessible digital value of processor, thereby realizes the monitoring to voltage.
For guaranteeing the stability of system, it is stable to guarantee that at first power supply 15 is supplied with, so the voltage of reply power supply 15 batteries is monitored in real time, the current voltage that supply voltage monitoring circuit 16 is gathered battery divides two-way behind analog to digital conversion circuit: the one tunnel sends into receiver, can know the power supply size of transmitter at receiving terminal, display power supply size on receiver, another road are sent into governor circuit processing back and are shown in real time that at the display screen of display circuit the state of charge of battery is so that operating personnel's identification.
Claims (6)
1. visit ground instrument transmitter for one kind, comprise power supply, governor circuit, D/A converting circuit, radiating circuit and observation circuit, wherein governor circuit is a single-chip microcomputer, observation circuit comprises sample circuit, radiating circuit comprises bridge circuit, buffer circuit and emitting antenna circuit, buffer circuit is connected with governor circuit, and D/A converting circuit is connected with governor circuit, it is characterized in that:
Set up on-off circuit in the radiating circuit, the control end of described on-off circuit is connected with the output terminal of control circuit, the input end of control circuit is connected with D/A converting circuit, the input end of on-off circuit is connected with the output terminal of bridge circuit, the output terminal of on-off circuit is connected with sample circuit, set up igbt respectively on each arm of bridge circuit, in parallel with original igbt.
2. spy according to claim 1 ground instrument transmitter; it is characterized in that: described on-off circuit mainly is made up of igbt; the collector of igbt is connected with the output terminal of bridge circuit; the emitter of igbt is connected with sample circuit; the gate pole of igbt is connected with the output terminal of control circuit; the emitter of igbt and collector are in series with energy feedback buffer circuit, and gate pole and emitter are in series with the switch protection circuit.
3. spy according to claim 1 ground instrument transmitter, it is characterized in that: the quantity of the igbt of setting up respectively on described each arm is 2.
4. spy according to claim 1 ground instrument transmitter, it is characterized in that: set up the dutycycle observation circuit in the observation circuit, the detection input end of described dutycycle observation circuit is connected with sample circuit, and output terminal is connected with governor circuit.
5. spy according to claim 1 ground instrument transmitter, it is characterized in that: set up the waveform voltage observation circuit in the observation circuit, the detection input end of described waveform voltage observation circuit is connected with sample circuit, and output terminal is connected with governor circuit.
6. spy according to claim 1 ground instrument transmitter, it is characterized in that: set up supply voltage monitoring circuit in the observation circuit, the detection input end of described supply voltage monitoring circuit is connected with power supply, and output is connected with governor circuit through analog to digital conversion circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010618852 CN102129088A (en) | 2010-12-31 | 2010-12-31 | Ground detector transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010618852 CN102129088A (en) | 2010-12-31 | 2010-12-31 | Ground detector transmitter |
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|---|---|
| CN102129088A true CN102129088A (en) | 2011-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010618852 Pending CN102129088A (en) | 2010-12-31 | 2010-12-31 | Ground detector transmitter |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102540259A (en) * | 2011-12-21 | 2012-07-04 | 吉林大学 | High-density electrical exploration transmitter |
| CN102707321A (en) * | 2012-06-05 | 2012-10-03 | 北京工业大学 | Receiving and collecting system and method for transient electromagnetic instrument |
| CN112764453A (en) * | 2020-10-30 | 2021-05-07 | 中国科学院长春光学精密机械与物理研究所 | Transient electromagnetic transmitting system based on PID algorithm and control method thereof |
| CN112983402A (en) * | 2021-02-05 | 2021-06-18 | 中国矿业大学(北京) | Real-time early warning device and method for transient electromagnetic advanced intelligent detection while drilling in underground drilling |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7057390B1 (en) * | 2004-09-20 | 2006-06-06 | Southeastern Univ. Research Assn. | Linear beam raster magnet driver based on H-bridge technique |
| WO2006087510A1 (en) * | 2005-02-16 | 2006-08-24 | Illinois Tool Works, Inc. | Metal detector |
| CN201926769U (en) * | 2010-12-31 | 2011-08-10 | 桂林电子科技大学 | Ground penetrating device emitter |
-
2010
- 2010-12-31 CN CN 201010618852 patent/CN102129088A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7057390B1 (en) * | 2004-09-20 | 2006-06-06 | Southeastern Univ. Research Assn. | Linear beam raster magnet driver based on H-bridge technique |
| WO2006087510A1 (en) * | 2005-02-16 | 2006-08-24 | Illinois Tool Works, Inc. | Metal detector |
| CN201926769U (en) * | 2010-12-31 | 2011-08-10 | 桂林电子科技大学 | Ground penetrating device emitter |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102540259A (en) * | 2011-12-21 | 2012-07-04 | 吉林大学 | High-density electrical exploration transmitter |
| CN102707321A (en) * | 2012-06-05 | 2012-10-03 | 北京工业大学 | Receiving and collecting system and method for transient electromagnetic instrument |
| CN112764453A (en) * | 2020-10-30 | 2021-05-07 | 中国科学院长春光学精密机械与物理研究所 | Transient electromagnetic transmitting system based on PID algorithm and control method thereof |
| CN112983402A (en) * | 2021-02-05 | 2021-06-18 | 中国矿业大学(北京) | Real-time early warning device and method for transient electromagnetic advanced intelligent detection while drilling in underground drilling |
| CN112983402B (en) * | 2021-02-05 | 2023-03-03 | 中国矿业大学(北京) | Real-time early warning device and method for transient electromagnetic advanced intelligent detection while drilling in underground drilling |
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| ASS | Succession or assignment of patent right |
Owner name: BAISE MEILIAN TIANHENG EARTH-PROBING RADAR MANUFAC Free format text: FORMER OWNER: GUILIN ELECTRONIC SCIENCE AND TECHNOLOGY UNIV. Effective date: 20111206 |
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Free format text: CORRECT: ADDRESS; FROM: 541004 GUILIN, GUANGXI ZHUANG AUTONOMOUS REGION TO: 533000 BAISE, GUANGXI ZHUANG AUTONOMOUS REGION |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20111206 Address after: 533000, the Guangxi Zhuang Autonomous Region Baise Industrial Park Aluminum Industry Park (located in Youjiang District Six Tong) Applicant after: Guilin University of Electronic Technology Address before: 541004 1 Jinji Road, Qixing hi tech Zone, Guilin, the Guangxi Zhuang Autonomous Region Applicant before: Guilin University of Electronic Technology |
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Application publication date: 20110720 |