CN201035157Y - Engineering geology sounder - Google Patents
Engineering geology sounder Download PDFInfo
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- CN201035157Y CN201035157Y CNU2007202004318U CN200720200431U CN201035157Y CN 201035157 Y CN201035157 Y CN 201035157Y CN U2007202004318 U CNU2007202004318 U CN U2007202004318U CN 200720200431 U CN200720200431 U CN 200720200431U CN 201035157 Y CN201035157 Y CN 201035157Y
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Abstract
A project geological detector applied in project geological detection comprises a detection main device connected with power source, an emission coil and a reception coil connected with the detection main device, the inside of the outer shell of the detection main device is provided with a main processor used for data information processing and displaying, an emission system circuit used for signal emission, and a reception system circuit used to receive secondary signal, the main processor is provided with a data interface and a memory and is connected with the displaying screen. The shut time measuring circuit and the electricity current measuring circuit are connected with the main processor signal through an A/D conversion module. The reception system circuit is separately connected with a preamplifier, a low-pass filter, and a program control floating point amplifier circuit. The emission system circuit comprises a synchronization and emission circuit and a protection circuit connected therewith. The problem that the dynamic changing area of the secondary filed signal is large and the late signal is very weak is solved, the detection depth, precision, discerning capability, and response speed of the project geological detector are improved.
Description
(1) technical field
The utility model relates to a kind of geology detecting instrument, particularly a kind of transient electromagnetic method engineering geology detection instrument that is applied to the engineering geological investigation field.
(2) background technology
At present, in the engineering geological investigation field, the geological mapping method mainly is to adopt geophysical prospecting method (instrument), and the geophysical prospecting method kind is more, mainly contain electrical method, electromagnetic method, seismic event and sonic method three major types, the mise-a-la-masse method in the electrical method, natural electric field method and induced polarization method are mainly used in water detection; It is that the requirement landform is mild that resistivity method all has higher measuring accuracy, shortcoming to stratum vein, shatter belt, occurrence etc., and geologic body will have certain width and development length, and influenced seriously by frozen soil; Very low frequency (VLF) method in the electromagnetic method, investigation depth is more shallow, require the relative surrounding medium of the detection of a target to be obvious low-resistance, Electromagnetic Interference can not be too big; The electrical property difference that frequency sounding method requires that landform is more smooth, face of land overlayer resistivity can not be too low, require to be detected geologic body and country rock is bigger, and certain scale is arranged; Geological radar is applicable to that the detection of a target and surrounding medium have certain electrical property difference, and buried depth is little, face of land overlayer non-moisture many, salineness is high, the situation of pourable medium; Underground electromagnetic wave method requires the detection of a target to be low-resistance, no electromagnetic interference (EMI); In seismic event and the sonic method, it is more smooth all to require to be surveyed landform, and the seismic wave method investigation depth is subjected to the restriction of exciting force.Above-described method all exists shortcomings such as investigation depth is more shallow, precision is low, restrictive condition is more.
At present, transient electromagnetic method engineering geology detection instrument in the market mainly contains EMES-1S, the TEMS-3S series of China, Canadian TEM-37 series, Australian SIRO-TEM both at home and abroad.These instruments are burying the body detection, water detection looks for aspects such as ore deposit to obtain effect preferably, but no matter these transient electromagnetic method instrument products on the above-mentioned market are from investigation depth, dynamic responding speed, resolving power, measuring accuracy, aspects such as portability still ubiquity very big shortcoming and defect, for example, investigation depth is shallow, (being no more than 1000 meters) sampling precision is low, speed responsive is slow, resolution characteristic is poor, volume is excessive, weight lays particular stress on, the lightest in the market transient electromagnetic method instrument also has about 18 kilograms, portable relatively poor, needs that therefore can't fine adaptation defence engineering exploration.
(3) utility model content
The purpose of this utility model provides a kind of engineering geology detection instrument, solve existing apparatus structure complexity, volume big, carry inconvenient problem; Also solve in the receiving system circuit the big and very faint problem of signal in late period of secondary field signal dynamics variation range; Solve simultaneously that investigation depth is not enough, response speed, precision, resolution characteristic need the technical matters that further improves.
For solving the problems of the technologies described above, the utility model by the following technical solutions:
A kind of engineering geology detection instrument, comprise the detection instrument main frame 2 that is connected with power supply 1, the transmitting coil 3 that is connected with the detection instrument main frame and receiving coil 7, in the shell 8 of detection instrument main frame, there is one to be used for the primary processor of processing data information and demonstration, an emission coefficient circuit and a receiving system circuit that is used to receive the secondary field signal that is used for the signal emission, it is characterized in that:
Above-mentioned primary processor mainly is the single-chip microcomputer that carries data acquisition software, data processing software, transmitting software, image processing software, and primary processor has data-interface and internal memory, and is connected with display screen; The turn-off time metering circuit is connected with the primary processor signal with buffer through the A/D modular converter with current measurement circuit.
In the above-mentioned receiving system circuit, be connected by prime amplifier, low-pass filter, program control floating point amplifier circuit successively, receiving circuit is connected with the primary processor signal with buffer through the A/D modular converter.
Above-mentioned emission coefficient circuit comprises synchronously and radiating circuit and the holding circuit that is attached thereto, is connected with the primary processor signal with radiating circuit synchronously.
Above-mentioned program control floating point amplifier circuit comprises three or eight code translators, latch and selects a switch by eight of latch control, the secondary field signal is input to eight enlargement factors, the output terminal of these amplifiers all is connected respectively to the input end that three or eight code translators and eight select a switch, the tri-bit encoding output terminal of three or eight code translators is connected to the input end of latch, three output terminals of latch select three output terminals of a switch with eight respectively and connect after be connected to data bus, eight select another output terminal of a switch to be connected to A/D converter.
Above-mentioned synchronous and radiating circuit is made up of low-resistance transmitting coil, transistor amplifier T1, T2, T3, T4 and power supply E, and positive transponder pulse F1 is connected with the base stage of transistor amplifier T1 and T4; Negative transponder pulse F2 is connected with the base stage of transistor amplifier T2 and T3; The emitter of T1 is connected with an end of transmitting coil 3 with the collector of T3 simultaneously; The emitter of T2 is connected with the other end of transmitting coil 3 with the collector of T4 simultaneously; The anodal of power supply E is connected with the collector of T1, T2 simultaneously; The negative pole of power supply E is connected with the emitter of T3, T4 simultaneously.
The utility model engineering geology detection instrument is used the transient electromagnetic method principle, transient electromagnetic method is applicable to that the relative surrounding medium of the detection of a target is low-resistance, the situation that no stray current disturbs, not limited by landform, investigation depth is darker, as shown in Figure 1, the know-why of transient electromagnetic method is: by coil to underground emission magnetic-pulse, magnetic-pulse will produce eddy current when passing underground medium, eddy current just can produce secondary magnetic field, ground receives the resistivity distribution that secondary magnetic field can be measured underground medium, and then infers the unfavorable geology unit, geology layering and underground water, the underground body that buries, the position that exists Deng the subsurface anomaly body.Compare with other physical prospecting technology, have highly sensitive, resolution is strong, investigation depth is big, flexible and changeable, adaptability is strong, and light, quick, cheap plurality of advantages.
The utility model will carry data acquisition software, data processing software, transmitting software, inversion interpretation mapping software in primary processor single-chip microcomputer has replaced traditional baroque hardware signal amplification, filtering, and display process circuit with the software processes of amplification, filtering and data-signal; Owing to adopted the software processes of single-chip data signal to replace traditional baroque hardware signal treatment circuit, make the simplification of entire circuit plate structure, volume-diminished, weight saving, wherein adopt the method back analysis secondary magnetic field signal of intending earthquake first, the inversion interpretation mapping software makes inversion interpretation diversification as a result, the channel array curve is not only arranged, also can show resistivity chromatogram, conductivity chromatogram, intend earthquake displayed map and geology slice map.
The utility model adopts program control floating point amplifier circuit in the receiving system circuit, in order to solve the big and very faint problem of signal in late period of secondary field signal dynamics variation range; In the emission coefficient circuit, also be provided with and comprise the low-resistance coil and can reduce transmission frequency and the synchronous and radiating circuit of raising emission voltage, thereby improved the investigation depth of engineering geology detection instrument, make the utility model investigation depth big, investigation depth reaches more than 1000 meters, response speed is fast, the precision height, resolution characteristic is strong, data transmission is fast, volume is little, in light weight, applied widely, good combination property, the national defence that both can be used for complex-terrain and complex geological condition, the geological mapping of civil air defense constructions and installations also can be used for the geological mapping of civil engineering, the underground body that buries is surveyed, construction advanced prediction and water detection, look for fields such as ore deposit.
(4) description of drawings
Fig. 1 is a principle of work synoptic diagram of the present utility model.
Fig. 2 is the synoptic diagram of the utility model profile embodiment.
Fig. 3 is the utility model engineering geology detection instrument circuit block diagram.
Fig. 4 is the principle of work block diagram that single-chip microcomputer is connected with reception, transmitting coil.
Fig. 5 is program control floating point amplifier circuit block diagram.
Fig. 6 is synchronous and radiating circuit schematic diagram.
Fig. 7 is the transponder pulse sequential chart.
Mark among the figure: 1-power supply, 2-detection instrument main frame, 3-transmitting coil, 4-transmit, 5-received signal, 6-are buried body, 7-receiving coil, 8-shell.
(5) embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Embodiment as shown in Figure 1, 2, the utility model engineering geology detection instrument comprises the detection instrument main frame 2 that is connected with power supply 1, the transmitting coil 3 that is connected with detection instrument main frame 2 and receiving coil 7.Send and transmit 4 to burying body 6 through transmitting coil 3 by detection instrument main frame 2; To bury the received signal 5 of body by receiving coil 7 and issue detection instrument main frame 2 through receiving coil.
In the shell 8 of detection instrument main frame, comprise:
A primary processor that is used for processing data information and demonstration;
An emission coefficient circuit that is used for the signal emission;
A receiving system circuit that is used to receive the secondary field signal.
Referring to Fig. 3, above-mentioned primary processor mainly is the single-chip microcomputer that carries data acquisition software, data processing software, transmitting software, image processing software, and primary processor has data-interface and internal memory, and is connected with display screen.The turn-off time metering circuit is connected with the primary processor signal with buffer through the A/D modular converter with current measurement circuit.
In the above-mentioned receiving system circuit, be connected by prime amplifier, low-pass filter, program control floating point amplifier circuit successively, receiving circuit is connected with the primary processor signal with buffer through the A/D modular converter.
Above-mentioned emission coefficient circuit comprises synchronously and radiating circuit and the holding circuit that is attached thereto, is connected with the primary processor signal with radiating circuit synchronously.
Referring to Fig. 3,4, the ultimate principle of the present utility model and the course of work are: produce the square wave of different frequency positive-negative polarity by the single-chip microcomputer of primary processor commander emission and synchronizing circuit, the square wave of different frequency is exported to transmitting coil again and carry out intermittence and launch.Turn-off time metering circuit and current measurement circuit are measured the time and the supply current intensity of sampling beginning respectively, send into primary processor and handle after the A/D conversion.The receiving system circuit carries out preposition amplification, low-pass filtering, floating-point amplification with the secondary field signal that receives, after analog to digital conversion, send into buffer area again, read in the buffer area data by primary processor utilization Flame Image Process instrument by bus and carry out data processing, and show through the liquid crystal display imaging.
The utility model engineering geology detection instrument will carry data acquisition software, data processing software, transmitting software, inversion interpretation mapping software in primary processor single-chip microcomputer has replaced traditional baroque hardware signal amplification, filtering and display process circuit with the software processes of amplification, filtering and data-signal; In primary processor, adopted program control floating point amplifier, to solve the big and very faint problem of signal in late period of secondary field signal dynamics variation range.
As shown in Figure 5, program control floating point amplifier comprises three or eight code translators, latch and selects a switch by eight of latch control, the secondary field signal is input to 8 enlargement factor, the output terminal of these amplifiers is connected respectively to the input end that three or eight code translators and eight select a switch, the tri-bit encoding output terminal of three or eight code translators is connected to the input end of latch, three output terminals of latch select three output terminals of a switch with eight respectively and connect after be connected to data bus, eight select another output terminal of a switch to be connected to A/D converter.Because the secondary field signal of geology detecting instrument observation is the negative exponent die-away curve, early signal is very strong, can reach three ten-day period of hot season level sometimes, and rate of change is very big, and frequency content is very high.And late period, signal was very faint, reached several microvolts sometimes, even less than 1 microvolt.This curve dynamic range is big, can reach 10
-6～10
7Microvolt; Resolution requirement is very high, needs 0.2 μ v; Frequency band is very wide, the high-end 100kHz that reaches.And these three indexs in digital implementation, condition each other, conflicting, be difficult to satisfy simultaneously the requirement of three indexs, even if select current state-of-the-art high speed, 16 A/D converters of high resolving power for use, also can only realize 10
± 5Dynamic range.After adopting program control floating point amplifier, the enlargement factor that inputs to eight series connection simultaneously when the secondary field signal all is * 2 operational amplifier, output to three or eight code translators and eight and select a switch after operational amplifier amplifies, this floating-point amplifying circuit at first carries out ladder relatively.Relatively, obtain the tri-bit encoding of marking signal power immediately through three or eight code translators, this tri-bit encoding is selected a switch by latch control eight, can a certain switch of corresponding gating.Optimum amplifying signal is input to 16 A/D.In A/D when sampling conversion, tri-bit encoding locking, and this tri-bit encoding is considered as the exponent of data, the data by computer bus and A/D deposit datarams simultaneously in.This program control floating point amplifier can make A/D expand to 24 A/D at a high speed, if the serial connection amplifier is * 4, then can expand to 32.
Shown in Fig. 6,7, the utility model engineering geology detection instrument has adopted the synchronous and radiating circuit that can reduce transmission frequency and improve emission voltage in the emission coefficient circuit, it is made up of low-resistance transmitting coil, transistor amplifier T1, T2, T3, T4 and power supply E, and positive transponder pulse F1 is connected with the base stage of transistor amplifier T1 and T4; Negative transponder pulse F2 is connected with the base stage of transistor amplifier T2 and T3; The emitter of T1 is connected with an end of transmitting coil with the collector of T3 simultaneously; The emitter of T2 is connected with the other end of transmitting coil with the collector of T4 simultaneously; The anodal of power supply is connected with the collector of T1, T2 simultaneously; The negative pole of power supply is connected with the emitter of T3, T4 simultaneously.
Produce by the single-chip microcomputer commander synchronously, different investigation depths adopt different transmission frequencies, disturb for eliminating for 50 weeks, transmission frequency is the pulse times over 50 weeks of multiple or a few branch always, antihunting circuit is the circuit that prevents its overshoot after current impulse is turn-offed, the measurement of electric current turn-off time is for determining that receiving sampling began to sample from the turn-off time of being surveyed, so that catch the shallow-layer signal.Positive negative pulse stuffing F1 in the transmitting coil and F2 designs for eliminating to disturb in 50 weeks, positive and negative transponder pulse F1 in the transmitting coil and the sequential of F2 as shown in Figure 6, T1, T4 conducting, the pulse of coil formation forward current; T2, T3 conducting, coil forms reverse current pulses.Owing to be magnetic coupling, coil is the magnetic emission, so coil and instrument are all earth-free, selects the little coil of resistance simultaneously for use.If the increasing emissive power only needs to improve cell voltage and gets final product.Generally in the dark scope of 50m, get final product with a 12V18AH maintenance-free battery; In 50m～100m scope, get final product with two 12V18AH maintenance-free batteries; In 100m～200m scope, get final product with three 12V18AH maintenance-free batteries; In 200m～1000m scope, with four 12V18AH maintenance-free batteries, because emission power is short circuit to transmitting coil basically, if therefore winding wire is directly selected improper or launched overtension and all might cause radiating circuit to burn out.For this reason, hardware and software protection circuit have been designed.Hardware is limit with supercurrent and is stopped the method for transmitting protection with protection of high-speed dedicated circuit sampling ratio, software.
Claims (3)
1. engineering geology detection instrument, comprise the detection instrument main frame (2) that is connected with power supply (1), the transmitting coil (3) that is connected with the detection instrument main frame and receiving coil (7), in the shell (8) of detection instrument main frame, there is one to be used for the primary processor of processing data information and demonstration, an emission coefficient circuit and a receiving system circuit that is used to receive the secondary field signal that is used for the signal emission, it is characterized in that:
Above-mentioned primary processor mainly is the single-chip microcomputer that carries data acquisition software, data processing software, transmitting software, image processing software, and primary processor has data-interface and internal memory, and is connected with display screen; The turn-off time metering circuit is connected with the primary processor signal with buffer through the A/D modular converter with current measurement circuit;
In the above-mentioned receiving system circuit, be connected by prime amplifier, low-pass filter, program control floating point amplifier circuit successively, the receiving system circuit is connected with the primary processor signal with buffer through the A/D modular converter;
Above-mentioned emission coefficient circuit comprises synchronously and radiating circuit and the holding circuit that is attached thereto, is connected with the primary processor signal with radiating circuit synchronously.
2. according to the described engineering geology detection instrument of claim 1, it is characterized in that: described program control floating point amplifier circuit comprises three or eight code translators, latch and select a switch by eight of latch control, the secondary field signal is input to eight enlargement factors, the output terminal of these amplifiers all is connected respectively to the input end that three or eight code translators and eight select a switch, the tri-bit encoding output terminal of three or eight code translators is connected to the input end of latch, three output terminals of latch select three output terminals of a switch with eight respectively and connect after be connected to data bus, eight select another output terminal of a switch to be connected to A/D converter.
3. according to the described engineering geology detection instrument of claim 1, it is characterized in that: describedly be made up of low-resistance transmitting coil, transistor amplifier (T1), (T2), (T3), (T4) and power supply (E) with radiating circuit synchronously, just transponder pulse (F1) is connected with the base stage of transistor amplifier (T1) and (T4); Negative transponder pulse (F2) is connected with the base stage of transistor amplifier (T2) and (T3); (T1) emitter is connected with an end of transmitting coil (3) with the collector of (T3) simultaneously; (T2) emitter is connected with the other end of transmitting coil (3) with the collector of (T4) simultaneously; The anodal of power supply (E) is connected with the collector of (T1), (T2) simultaneously; The negative pole of power supply (E) is connected with the emitter of (T3), (T4) simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007202004318U CN201035157Y (en) | 2007-05-31 | 2007-05-31 | Engineering geology sounder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007202004318U CN201035157Y (en) | 2007-05-31 | 2007-05-31 | Engineering geology sounder |
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| CN201035157Y true CN201035157Y (en) | 2008-03-12 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121994A (en) * | 2010-12-20 | 2011-07-13 | 西安华朗物探科技有限公司 | Data acquisition plate design method for high-resolution petroleum seismic exploration system |
| CN105700025A (en) * | 2016-03-12 | 2016-06-22 | 湖南科技大学 | Detection method and apparatus for underground water runoff |
| CN108919364A (en) * | 2018-08-14 | 2018-11-30 | 中南大学 | A kind of sounding gear under strong electromagnetic interference environment |
| CN113949257A (en) * | 2021-10-19 | 2022-01-18 | 珠海智融科技股份有限公司 | Soft start circuit based on average current mode control system |
-
2007
- 2007-05-31 CN CNU2007202004318U patent/CN201035157Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121994A (en) * | 2010-12-20 | 2011-07-13 | 西安华朗物探科技有限公司 | Data acquisition plate design method for high-resolution petroleum seismic exploration system |
| CN105700025A (en) * | 2016-03-12 | 2016-06-22 | 湖南科技大学 | Detection method and apparatus for underground water runoff |
| CN108919364A (en) * | 2018-08-14 | 2018-11-30 | 中南大学 | A kind of sounding gear under strong electromagnetic interference environment |
| CN108919364B (en) * | 2018-08-14 | 2019-04-05 | 中南大学 | A kind of sounding gear under strong electromagnetic interference environment |
| CN113949257A (en) * | 2021-10-19 | 2022-01-18 | 珠海智融科技股份有限公司 | Soft start circuit based on average current mode control system |
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