CN2329015Y

CN2329015Y - Detector for underground magnetic fluid

Info

Publication number: CN2329015Y
Application number: CN 98230684
Authority: CN
Inventors: 黄采伦; 应文亮
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-05-07
Filing date: 1998-05-07
Publication date: 1999-07-14
Anticipated expiration: 2008-05-07

Abstract

The utility model relates to a detector for detecting underground objects, which solves the problem that the observation consequence of a water detector has multiple results. The detector for detecting underground objects is composed of probes A 1 and A2 which are respectively output to comparators IC3 and IC4 after coupled with an impedance converting circuit via a capacitor C1, and a digital control potentiometer used for providing the reference voltage of the comparators is connected with a single chip computer. The comparators are output to the interrupted end of the single chip computer, the single chip computer is connected with a digital tube and a keyboard for form a scanning circuit for displaying the keyboard via the display of a transistor, and the single chip computer is connected with a memory. The utility model having the advantages of simplicity, application, unique detection result and high precision is suitable for water supply, hydraulic engineering, water prevention and control for mines, etc.

Description

Underground magnetic fluid detector

The utility model relates to a kind of underground magnetic fluid detector.

The first-elected electrical method of ground geophysical prospecting method water detection at present, the very low frequency method that next has the radioactivity prospecting method and measures the stratum magnetic component, the common ground of said method are to be applied in the geophysical prospecting method of seeking the solid mineral products to look on the underground water.Surface instrumentation measured value reflection be geologic body rerum natura integrated value, belong to static information, this physical quantity is shown is that underground the sort of solid mineral products or underground water are entirely with exponent's subjective experience.So the water detection success ratio of said method has only 40%-50%, the multi-solution of its physical prospecting curve that has its source in.

The purpose of this utility model is to provide a kind of water detection geophysical prospecting equipment that can accurately survey the underground water data.

The utility model is finished with following mode: underground magnetic fluid detector is to detect the telluric electricity field signal by probe A1 and A2 to transport to comparer IC3 end of oppisite phase and comparer IC4 in-phase end respectively after being coupled to impedance inverter circuit through capacitor C 1, comparer IC3 in-phase end and comparer IC4 end of oppisite phase provide comparative voltage by two digital potentiometer IC1 and IC2 respectively, comparer IC3 exports the interrupt control end INTO of single-chip microcomputer IC5 to, comparer IC4 exports interrupt control end INTI and the T1 counting input end of single-chip microcomputer IC5 to, the P1.0 of single-chip microcomputer IC5 is connected with IC2 with digital potentiometer IC1 through the I2C bus with the P1.1 end, charactron and keyboard connect and compose the display keyboard sweep circuit by P0.P2 port and the P1.3 end of transistor display IC6 and resistance and single-chip microcomputer IC5, and storer connects P1.4 and the P1.5 end of single-chip microcomputer IC5 through universal serial bus.Impedance inverter circuit is made up of field effect transistor BG1 outer meeting resistance R1, R2, R3, R4, R5 and capacitor C 2, C3.

The underground magnetic fluid detector of the utility model has solved the problem of water detection geophysical prospecting equipment observed result multi-solution, by the multi-solution unique solution of making a leapleap forward, the hit rate that has improved sink wells greatly with become and rate, reduce the water source prospecting cost, improved economic benefit greatly.This instrument volume is little, simple to operate, cost is low, pole span (5-20 rice is adjustable) is little, decide the well precision up to below one meter, but independent operation is decided well, also can by serial port be connected with host computer (ordinary PC) carry out well location with and bit depth and become the macroanalysis of well yield etc.It can measure dam leakage, and underground utilities are surveyed and grotto is surveyed, 0-300 rice with interior effectively.All can use at water supply, hydraulic engineering, mine water management etc.

Fig. 1 is that the utility model uses synoptic diagram

Fig. 2 is the utility model circuit theory diagrams.

Below in conjunction with accompanying drawing the utility model is described in further detail:

Underground water in the rock stratum carries out mass exchange and energy conversion with the rock stratum under the effect of gravity, form by supply, through stream, drain the Groundwater Flow system that three parts are formed.Underground water is the widest optimum conductor that distributes, according to the law of electromagnetic induction, ground water regime is persistent movement in the terrestrial magnetic field, and producing complicated electromagnetic induction becomes magnetic fluid, the magnetic fluid of different depth feeds back the field of transient electrical magnetic wave earthward, and its shape and Groundwater Flow system are complementary on ground.As long as therefore record distribution field, just can find the distribution of Groundwater Flow system at the transient electrical magnetic wave on the face of land; So, deciding well has been a difficult matter no longer just.Have only mobile underground water to feed back the transient electrical magnetic wave earthward in the geologic body of underground different depth, so the unique also just ccontaining of physical prospecting achievement explanation doubted.

Shown in Figure 1 is subsurface fault section synoptic diagram; B is the component of terrestrial magnetic field in political affairs friendship direction among Fig. 1, and V is the flow direction of fluid in the tomography, according to the law of electromagnetic induction, will produce the induction electromotive force of an alternation in the E direction.Like this, detector just detects the induction electromotive force (phreatic multidate information) of alternation by probe A1 and A2, these information storage are got up, analyze, calculate, can draw about phreatic useful information (as: becoming well water flow and ground distance etc.) by upper computer software.

The principle of work of the underground magnetic fluid detector of the utility model as shown in Figure 2, probe A1, the telluric electricity field information that A2 measures number is coupled to impedance inverter circuit through C1, impedance inverter circuit is by field effect transistor BG1, resistance R 1-R5 and capacitor C 1, C2 forms, signal after impedance conversion is through R6, R7 send IC3 and two high precision of IC4 respectively, low-power consumption, quick comparer (TL3016), IC1 and IC2 are four digital potentiometers (X9241), it has storage or single-chip microcomputer is directly read the digitized positions of sliding end tap, support new features such as two-wire serial communication agreement, make the circuit structure and the software programming of instrument all oversimplify like this, saved A/T) complicacy, because the circuit to digital potentiometer connects serial connection technology connection of employing software vernier and control, makes the comparison precision bring up to 0.15mV (satisfying measurement requirement fully); WY1 is precision stabilized voltage supply MOC1403, is used to provide the high-end parameter voltage of two digital regulation resistances; 8 LED charactrons and keyboard are connected with P0 mouth, P2 mouth and the P1.3 of single-chip microcomputer IC5 by transistor display (ULN2803) IC6, resistance R 9-R17, constitute the display keyboard sweep circuit, show and keyboard employing dynamic scan mode: the RXD of single-chip microcomputer IC5, TXD and P1.2 and IC7 (TCL232) form the RS-232 communication interface of this instrument, use during upper PC reading of data: the measurement data storer that the P1.4 of 8 serial storagies such as IC8-IC15 and single-chip microcomputer, P1.5 form this instrument, the memory space of every serial storage are 2048 bit bytes.Therefore, the total storage capacity of instrument can reach 8 * 2048=16384 byte, enough data of one day of storage apparatus field acquisition; The control core of instrument is selected the AT89C51 single-chip microcomputer for use, its pin and order set and general MCS-51 series monolithic compatibility, but the Low-Power CMOS chip of its to be a kind of inside carry 4K program (need not expand) is fit to this instrument selection very much.

The course of work of the utility model instrument is as follows: telluric electricity field information detects by probe A1, A2, carries out impedance conversion through field effect transistor BG1 (3GJ6) and peripheral circuit, send inverting input and the comparer IC4 in-phase input end of comparer IC3 then respectively; IC3 in-phase input end and comparer IC4 inverting input provide comparative voltage by two four digital potentiometer IC1 and IC2 respectively, when producing, the INTO of single-chip microcomputer interrupts like this, the setting value of detection signal greater than IC1 is described, when INTI produces interruption, the setting value of detection signal less than IC2 is described, the two-wire serial bus of the software of single-chip microcomputer by constituting by P1.0 and P1.1, regulate the setting value of IC1 and IC2, until INTO, till INTI did not all interrupt, the single-chip microcomputer setting value (being the digitized positions of the sliding end of digital potentiometer) of reading IC1 and IC2 by the two-wire serial bus was easy to draw the amplitude of detection signal through computed in software like this.Then, the intermediate value of detection signal amplitude is used to reset the IC2 digital potentiometer, use IC4 to form a similar zero-crossing comparator (be about to detection signal and become pulse signal), close and interrupt the pulse of IC4 output being counted with the T1 counter, just can measure the frequency of signal this moment, so far, single-chip microcomputer send demonstration (high 4 segment voltage values with magnitude of voltage and the frequency values of being surveyed, low 4 display frequency values), simultaneously magnitude of voltage and frequency values are sent in the serial storage by the two-wire serial bus that P1.4, P1.5 constitute.After detection was finished, instrument can link to each other with upper PC by RS-2322.PC is read measurement data by the RS-23C mouth, can make the water conducted zone distribution plan, and multidate information figure etc. if be used for water detection, can also calculate well location, well depth and Cheng Jing and dope reference datas such as the water yield.

Claims

1, a kind of underground magnetic fluid detector, it is characterized in that detecting the telluric electricity field signal by probe A1 and A2 transports to comparer IC3 end of oppisite phase and comparer IC4 in-phase end respectively after being coupled to impedance inverter circuit through capacitor C 1, comparer IC3 in-phase end and comparer IC4 end of oppisite phase provide comparative voltage by two digital potentiometer IC1 and IC2 respectively, comparer IC3 exports the interrupt control end INTO of single-chip microcomputer IC5 to, comparer IC4 exports interrupt control end INTI and the T1 counting input end of single-chip microcomputer IC5 to, the P1.0 of single-chip microcomputer IC5 is connected with IC2 with digital potentiometer IC1 through the I2C bus with the P1.1 end, charactron and keyboard are by the P0 of transistor display IC6 and resistance and single-chip microcomputer IC5, P2 port and P1.3 end connect and compose the display keyboard sweep circuit, and storer connects P1.4 and the P1.5 end of single-chip microcomputer IC5 through universal serial bus.

2,, it is characterized in that impedance inverter circuit is made up of field effect transistor BG1 outer meeting resistance R1, R2, R3, R4, R5 and capacitor C 2, C3 according to the described underground magnetic fluid detector of claim 1.