CN202583476U - High precision geodetic audio electrical prospecting instrument - Google Patents
High precision geodetic audio electrical prospecting instrument Download PDFInfo
- Publication number
- CN202583476U CN202583476U CN 201220146426 CN201220146426U CN202583476U CN 202583476 U CN202583476 U CN 202583476U CN 201220146426 CN201220146426 CN 201220146426 CN 201220146426 U CN201220146426 U CN 201220146426U CN 202583476 U CN202583476 U CN 202583476U
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- circuit
- high precision
- electrical prospecting
- audio frequency
- prospecting apparatus
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Abstract
The utility model relates to a high precision geodetic audio electrical prospecting instrument which comprises a main control electric appliance, a display, a keyboard, a data memory and two identical signal input modules. The two signal input modules are connected with a main controller which is connected with the display, the keyboard, and the data memory respectively. Compared with the prior art, the high precision geodetic audio electrical prospecting instrument has the advantages of high measuring precision, convenient use, rapidness, high efficiency and the like.
Description
Technical field
The utility model relates to the geophysical exploration technology field, especially relates to a kind of high precision the earth audio frequency electrical prospecting apparatus.
Background technology
The earth audio frequency electrical prospecting apparatus uses the natural sound signal of the earth (generally at 20-5000HZ) as field source; This quasi-instrument has that prospecting prime cost is low, efficient is high, depth of exploration is big, applied range, do not receive the influence of high resistance body and low resistance body, is fit to field and city and uses.Receive vast geophysics worker's attention, order has only the similar instrument sales of import at home, and the instrument that does not have specialty to use separately promotes receiving some restrictions.
The utility model content
The purpose of the utility model is exactly to provide a kind of measuring accuracy high, easy to use, high precision the earth audio frequency electrical prospecting apparatus rapidly and efficiently for the defective that overcomes above-mentioned prior art existence.
The purpose of the utility model can realize through following technical scheme:
A kind of high precision the earth audio frequency electrical prospecting apparatus; Comprise master control electrical equipment, display, keyboard, data-carrier store and two identical signal input module; Two signal input module all are connected with master controller, and this master controller is connected with display, keyboard, data-carrier store respectively.
Described signal input module comprises the sensor that connects successively, preceding attenuator circuit, power frequency inhibition circuit, potential compensation circuit, signal amplification circuit and the AD sample circuit put.
Putting attenuator circuit before described is the passive capacitive resistor network.
Described passive capacitive resistor network has two output terminals, and the pad value of two output terminals is respectively 0.1 and 0.01.
It is active double T rejector circuit that described power frequency suppresses circuit.
Described signal amplification circuit comprises pre-amplification circuit, programming amplifying circuit and the selective frequency amplifier circuit that connects successively, and described pre-amplification circuit is a differential amplifier circuit.
Compared with prior art, the utlity model has following advantage:
One, energy-conserving and environment-protective: use the earth sound signal as the exploration field source, need not to consume the more energy and discharging, energy-conserving and environment-protective.
Two, usable range is wide: be suitable for the exploration of various fields and urban environment, solve that existing instrument receives low resistance body shielding and high resistance body is poor conductive influences.
Three, data are accurate: guarantee stability, the frequency of two channel measurements and the height consistance of time of fixed frequency, fully guaranteed the stability and the accuracy of measurement data.
Four, detection speed is fast: lossless detection, and instrument is light, and acquisition speed is fast, compares other DC electrical method quasi-instruments, and exploration speed improves 10 times.
Five, simple and convenient: instrument is light, and display can the friendly man-machine interface of reality, and is easy-to-understand, easy to use.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Fig. 2 is put the circuit diagram of attenuator circuit before being;
Fig. 3 suppresses the circuit diagram of circuit for power frequency;
Fig. 4 is the circuit diagram of potential compensation circuit;
Fig. 5 is the circuit diagram of pre-amplification circuit;
Fig. 6 is the circuit diagram of AD sample circuit.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is elaborated.
Embodiment
As shown in Figure 1; A kind of high precision the earth audio frequency electrical prospecting apparatus; Comprise that master control electrical equipment 1, display 2, keyboard 3, data- carrier store 4 and 5, two signal input module 5 of two identical signal input module include the sensor 51 that connects successively, preceding attenuator circuit 52, power frequency inhibition circuit 53, potential compensation circuit 54, pre-amplification circuit 55, programming amplifying circuit 56, selective frequency amplifier circuit 57 and the AD sample circuit 58 put.
Before put attenuator circuit 52 and adopt passive capacitive resistor network as shown in Figure 2, be provided with two output terminals, the pad value of two output terminals is respectively 0.1 and 0.01.Power frequency suppresses circuit 53 and adopts the adjustable active double T rejector circuit of Q value as shown in Figure 3, guarantees the effective elimination noise signal in back.Potential compensation circuit 54 adopts TLC2254 chip and peripheral circuit as shown in Figure 4, can guarantee the high precision of field sampling and be suitable for each department to be suitable for, and the spontaneous potential of different regions is compensated, and improves the instrument test degree of accuracy.Pre-amplification circuit 55 adopts differential amplifier circuit as shown in Figure 5, has very high input impedance, can obtain higher common-mode rejection ratio.AD sample circuit 58 adopts high-precision AD modulus conversion chip ADS8329 and peripheral circuit thereof as shown in Figure 6 to carry out data acquisition, adopts DFT to carry out spectral filtering, guarantees the precision and the frequency time consistency of sampling.Display 2 adopts friendly human-computer interaction interface, makes that operation is more convenient, the convenient use.
Situation and audio-frequency magnetotelluric magnetic method resistivity fundamental formular in conjunction with for many years actual use
ρ is apparent resistivity (Ω m) in the formula, E
xBe X-direction electric field intensity (mV/Km), H
yBe magnetic field intensity (nT) perpendicular to X-direction.As long as record the electric field strength E of certain frequency
xWith magnetic field intensity H
yJust can calculate apparent resistivity ρ.
Apparent resistivity ρ to be calculated accurately, frequency f, electric field strength E must be guaranteed
xWith magnetic field intensity H
yAccuracy, therefore owing to the natural sound signal of the earth can change in time, adopt two signal input module 5 of two-way to gather electric field strength E simultaneously
xWith magnetic field intensity H
y, when guaranteeing frequency accuracy, also guarantee E
xAnd H
yConsistance and accuracy, the degree of accuracy that make to detect is apparently higher than traditional instrument.
Claims (6)
1. high precision the earth audio frequency electrical prospecting apparatus; It is characterized in that; Comprise master control electrical equipment, display, keyboard, data-carrier store and two identical signal input module; Two signal input module all are connected with master controller, and this master controller is connected with display, keyboard, data-carrier store respectively.
2. high precision the earth audio frequency electrical prospecting apparatus according to claim 1; It is characterized in that described signal input module comprises the sensor that connects successively, preceding attenuator circuit, power frequency inhibition circuit, potential compensation circuit, signal amplification circuit and the AD sample circuit put.
3. high precision the earth audio frequency electrical prospecting apparatus according to claim 2 is characterized in that, putting attenuator circuit before described is the passive capacitive resistor network.
4. high precision the earth audio frequency electrical prospecting apparatus according to claim 3 is characterized in that described passive capacitive resistor network is provided with two output terminals, and the pad value of two output terminals is respectively 0.1 and 0.01.
5. high precision the earth audio frequency electrical prospecting apparatus according to claim 2 is characterized in that, it is active double T rejector circuit that described power frequency suppresses circuit.
6. high precision the earth audio frequency electrical prospecting apparatus according to claim 2; It is characterized in that; Described signal amplification circuit comprises pre-amplification circuit, programming amplifying circuit and the selective frequency amplifier circuit that connects successively, and described pre-amplification circuit is a differential amplifier circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220146426 CN202583476U (en) | 2012-04-09 | 2012-04-09 | High precision geodetic audio electrical prospecting instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220146426 CN202583476U (en) | 2012-04-09 | 2012-04-09 | High precision geodetic audio electrical prospecting instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202583476U true CN202583476U (en) | 2012-12-05 |
Family
ID=47252876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220146426 Expired - Lifetime CN202583476U (en) | 2012-04-09 | 2012-04-09 | High precision geodetic audio electrical prospecting instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202583476U (en) |
-
2012
- 2012-04-09 CN CN 201220146426 patent/CN202583476U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121205 |
|
| CX01 | Expiry of patent term |