CN103383466B - A kind of coal seam water radio measuring instrument - Google Patents

Abstract

A kind of coal seam water radio measuring instrument, it is characterized in that, described coal seam water radio measuring instrument comprises binary channels low frequency and ultralow frequency radiation meter and two groups of double antenna groups, described binary channels low frequency and ultralow frequency radiation meter, passage one is DICK formula broadband total intensity receiver for radiometer, and its 3db with is wide is 500Hz-6.5MHz; Passage two is 16 Channel scan resonant mode total power radiometer receivers, and its 16 Channel scan resonant tank centre frequency is 200Hz-1.05MHz; Two groups of double antenna groups are respectively the board-like double antenna group of plate aerial and ferrite antenna composition and the tubular type double antenna group of helical antenna and ferrite antenna composition; Described coal seam water radio measuring instrument also comprises A/D conversion, display registering instrument, explosion-proof rechargeable Ni-H 2 battery group, DC/DC translation circuit and high-accuracy stabilized voltage supply.

Description

A kind of coal seam water radio measuring instrument

Technical field

The present invention relates to a kind of measurement mechanism of coal seam water, especially a kind of coal seam water radio measuring instrument is related to, utilize the methods such as the radio astronomy modulation in radioastronomy, total power and absolute calibration, by more accurately measuring the radiation Strong degree in radio radiation source, (moisture) coal seam, orientation and length of normal, coal seam water cut can be distinguished how many, and judge coal seam different parts underground water abundance etc.

Background technology

In China's energy structure, coal accounts for the proportion of 70%, along with the increase of the colliery depth of excavation and the expansion of limit of mining, gas explosion, coal petrography are given prominence to, top board slump, Mine Dust and mine groundwater management task more and more heavier.List is prevented and treated with mine groundwater, although have ground geophysical prospecting to visit water, tunnel electric-resistivity method survey the ways and meanses such as water, but the former can only determine underground reservoir Position Approximate on earth's surface, latter is difficult to detect out the water cut in the coal rock layer of Bian workplace front, thus fundamentally can not solve the prediction problem of mine groundwater in the Bian coal process of colliery.

At present, the measurement for coal seam water mainly adopts following two kinds of methods:

1, physical logging:

Utilize coal and water one for solid one be liquid, different with electromagnetic reaction to seismic wave, arrange several on ground and put and the data passing through reception difference, nationality is to analyze and to measure the distribution situation of the interior coal of underground, rock, water on a large scale.The advantage of this method is in terrestrial operation, topped wide; Shortcoming is divided for being difficult to Fine.Geologic prospecting on a large scale can only be used for.

2, the resis tance method of surveying:

Utilize the resistivity that coal is different with water, place a series of probe in the boring of underground passage wall, by measuring the resistance between different boring point probe, nationality is to analyze and to measure the distribution situation of coal, water in the simple scope of wall.The advantage of this method is simple, shortcoming is complex operation (will bore tens to up to a hundred holes and measure the resistance between probe respectively), non-instant (computational analysis afterwards, be difficult to the real time measure), and among a small circle except extrapolation, be difficult to obtain the data of inspecting hole deep particularly front, tunnel coal seam water except the distribution situation determining the simple scope coal of wall, water.The method is mainly used in fixed point inspection.

The normal physical characteristics utilizing reception celestial radio radiation and radiation frequency spectrum analysis to measure remote celestial body in radioastronomy.The principle that radio radiation is measured is based on Boltzmann theorem:

P=KT

Namely ideal black-body is under non-absolute zero, and its radiation intensity P is proportional to its absolute temperature T, Boltzmann constant K=1.38 × 10-23W/Hz ° K;

For imperfect black matrix, P=σ KT, in formula, σ is emission ratio, 0≤σ≤1, when σ=1 is ideal black-body.

Boltzmann radiation covers whole electromagnetic wave spectrum, is namely radiated gamma Rays or shorter from myriameter waves.Therefore, determine the Boltzmann radiation intensity P of object and know its emission ratio σ, namely can determine the absolute temperature T of this testee.

Yellow Fuquans etc. (CN201010105756.4) propose a kind of coal bed gas radio spectrum direction-finding early warning system, comprehensive, hyperchannel, high performance coal bed gas radio spectrum direction-finding system in comprehensive utilization Radio Astronomical Methods realize the reception to five kinds of coal-bed gas radio radiation signals, measure and record its radiation temperature, relative intensity, the isoparametric change of radiation frequency spectrum and form, nationality is with indirect determination coal-bed gas pressure, radial patterning and emission types thereof, determine its position, thus Instructing manufacture, early warning watt are prominent.

But coal-bed gas and glassware for drinking water have different physical propertys, one be gas one is liquid, and gas can be compressed, and liquid can be compressed hardly; Met space by the gas compressed will sharply expand, the expansion of this methane gas causes coal petrography to ftracture and produces radio radiation just, and this radiation can have higher electron temperature and can reach larger intensity instantaneously or form surge and noise; The convection current of liquid and conduction make its temperature easily reach consistent, and thus its radio radiation is a kind of gradual steady state of radiation in essence; Obviously, both radio radiations have significantly different characteristics.How to measure the radio radiation in moisture coal seam, and utilize the water in radio radiation analysis to measure coal seam, need consider following factor: first, there is surge and noise in the radio radiation of liquid hardly; Secondly, the radiation intensity of coal seam water, lower than coal-bed gas radio radiation intensity, thus needs higher complete machine gain, higher sensitivity, higher complete machine gain stability and more powerful integral performance; 3rd, up to now not to the report of coal seam water radio radiation characteristic, have to greatly expand the frequency band range of reception for realizing measurement object, the f of full power system frequency acceptance band _max/ f _minexpand to 500 by 40, quantitative change causes qualitative change, thus substantially increases difficulty; Finally comprise the change variation of the band essence in the structure and circuit brought thus.

For the radio realizing coal seam water is measured, the present invention is intended to redesign a kind of coal seam of development radio ice detector.

Summary of the invention

The present invention seeks to as overcoming above-mentioned prior art weak point existing on coal seam water is measured, utilize radioastronomy method, comprise in radio astronomy modulate, the method such as total power and absolute calibration, a kind of coal seam water radio measuring instrument is provided, it is the coal seam water radio measuring and analysis system of the many sensing units of a kind of hyperchannel, by measuring coal seam water as the radiation temperature in radio radiation source, relatively Strong degree and the parameter such as radiation source orientation and polarization, nationality is to measure the orientation of water enrichment region in coal rock layer and abundance etc.

The radio radiation being different from coal-bed gas measures, coal seam water radio is measured based on following principle: coal different with water physical aspect (be solid one be liquid), thus except proportion, specific heat, acoustic propagation speed difference, at least also have 4 different with the physical constant that radio radiation is correlated with, and have larger gap:

Emission ratio σ is different, and coal is black object, therefore σ is close to 1, and be about between 0.6-0.9 with ature of coal difference (stone coal, bituminous coal, brown coal), water is then less than 0.5;

DIELECTRIC CONSTANT ε is different, and hard coal is about 2-3, and pure water is then 81;

Electricalresistivityρ is different, and carbon is about 1-100 Ω cm, and graphite is about 1-10 Ω cm, and coal is about 10-100 Ω cm, and pure water is then much bigger, but is usually dissolved with multiple salinity in light water, therefore resistivity is much smaller, and usual common resistivity of water is less than coal;

Transient-state temperature t is different, water is owing to being that liquid has convection action, temperature conduction is faster compared with the coal of solid, thus its temperature is not identical with coal seam due to its mobility for coal seam water, when the snow-broth that particularly snow mountain dissolves flows through coal seam, its temperature is obviously lower than coal seam, and the underground water flowing through inclined seam also with to flow through coal seam identical, can not also exist thermograde Δ t because of its temperature of its mobility.

The difference of these 4 physical constants is the basic foundations utilizing radio radiation method to measure coal seam water.

The underlying instrument measuring coal seam water by radio radiation method is exactly radio radiation meter.Because coal seam and coal seam water raise with electromagnetic frequency electromagnetic absorption and sharply raise, so the electromagnetic wave of the Boltzmann radiation that can be received mainly low frequency and ultralow frequency component, so, in brief, the radio radiation meter of measurement coal seam water of the present invention is a kind of low frequency and ultralow frequency radiation meter.

The present invention is by the following technical solutions:

A kind of coal seam water radio measuring instrument, it is characterized in that, described coal seam water radio measuring instrument comprises binary channels low frequency and ultralow frequency radiation meter and two groups of double antenna groups, described binary channels low frequency and ultralow frequency radiation meter, passage one is DICK formula broadband total intensity receiver for radiometer, and its 3db with is wide is 500Hz ~ 6.5MHz; Passage two is 16 Channel scan resonant mode total power radiometer receivers, and its 16 Channel scan resonant tank centre frequency is 200Hz ~ 1.05MHz; Two groups of double antenna groups are respectively the board-like double antenna group of plate aerial and ferrite antenna composition and the tubular type double antenna group of helical antenna and ferrite antenna composition; Described coal seam water radio measuring instrument also comprises A/D conversion, numerical monitor and registering instrument, explosion-proof rechargeable Ni-H 2 battery group, DC/DC translation circuit and high-accuracy stabilized voltage supply.

In described coal seam water radio measuring instrument, except antenna sets, all respective being placed in altogether afterwards with the airtight shielding of the silver-plated shell of bilayer has in the drip-proof type sealing metal shell of metal-coated membrane glass window, and antenna sets then introduces antidrip sealing metal shell with flame-proof explosion-proof cable by sealing adaptor.

Radio radiation meter of the present invention can measure the radiation intensity of coal and water, and measures the different transient-state temperature t of coal and water by the different emission ratio σ of coal and water.By the demarcation etc. of the receiver absolute calibration to radio radiation meter, Antenna aperture absolute calibration, moisture-free coal and underground water, the coal water cut can distinguished in coal seam is how many, can judge coal seam different parts underground water abundance etc.

In described coal seam water radio measuring instrument, passage one for intensity lower, the mensuration of more stable broadband coal seam water radio radiation, passage two for intensity higher, the mensuration of coal seam water radio radiation intensity that different frequency radiation intensity differences is larger, and can mutually comparison to reduce false-alarm and erroneous judgement.

Different its equivalent resistivity ρ is also different for coal seam water cut, thus it is also different to the absorption of radio radiation, during left-right rotation plate aerial, the radiation intensity of different azimuth just represents the relative ratios of its radiation and absorption, obviously can distinguish the coal seam water cut of different azimuth thus.Accordingly, different its effective dielectric constant ε is also different for coal seam water cut, the change of the refractive direction that the different medium layer that it causes causes is also different, the change that this kind changes the radiation intensity caused can be measured during upper and lower pivotal plate antenna, thus by calibrating and calculate the changing value of coal seam water cut on different luffing angle.

Described board-like double antenna group is mainly used in digging tunnel coal section and detects, and ferrite antenna is parallel to be installed on above plate aerial frame, and both can make level on antenna mount or pitching rotates.Preferably 16 segmented ferrite antennas of 0.5 meter of square plate aerial and 0.4 meter long.

Described plate aerial is be placed in accurate logarithm period flat plane antenna in the flat square box of low loss dielectric, that cladded by high ε medium powder, inductance loading.Its antenna main lobe is perpendicular to antenna plane.Concentric cable is drawn, wideband operation.

Described ferrite antenna is that 16 tapped-windings are wound on the long feerod of 40cm, and 16 combination coaxial cables are drawn, and are undertaken tuning by Single-chip Controlling tuning capacitance in machine, carry out frequency-selecting; Antenna radiation pattern is 8-shaped.

Described tubular type double antenna group is mainly used in having entanglement and the topped tunnel flank hole of cement to detect, be made up of helical antenna and segmentation coiling ferrite antenna, ferrite antenna axle center and helical antenna axle center are on the same line and be installed on helical antenna rear end, both are all placed in low loss dielectric hollow circular-tube, can stretch in boring and detect boring front and around coal seam water cut.Preferably 16 segmented ferrite antennas of 1 meter of helical antenna and 0.6 meter long.

Big L/D ratio (L/D >=20) helical antenna that described helical antenna is preferably placed in low loss dielectric pipe front end, that cladded by high ε medium powder.Its antenna main lobe points to front.Concentric cable is drawn, wideband operation.

Described ferrite antenna be preferably placed in low loss dielectric pipe rear end, 16 tapped-windings are wound on the long feerod of 60cm, 16 combination coaxial cables are drawn, and are undertaken tuning by Single-chip Controlling tuning capacitance in machine, carry out frequency-selecting; Antenna radiation pattern is 8-shaped.

Coal seam water radio measuring instrument employing two cover antenna combination of the present invention are the survey water needs in order to adapt to different coal mine working environment: Patcho antenna combines the coal face or ground, tunnel that are mainly used in blocking without wire netting; And tubular type antenna combination is mainly used in the bore detecting of coal face that wire netting blocks, scar or side, tunnel; Every suit Tian Xian Group closes and adopts double antenna to be all can realize standalone probe to meet two-channel radiometer, can mutually comparison disturb and false to eliminate, and the radiation characteristic realizing different antennae directional diagram compares.

In coal seam water radio measuring instrument of the present invention, described DICK formula broadband total intensity receiver for radiometer, plate aerial in double antenna group or both signals of helical antenna all access three end modulators through antenna socket and normal temperature terminator, aerial signal access band low noise prime amplifier after square-wave frequency modulation, connect after tunable low pass filter filters radio-frequency component after amplifying, 3 frequency rejection filters are accessed behind 5 or the isolation of 10db attenuator, through 10KHz, modulation aerial signal after 15KHz and 100KHz with prevents system amplifies to make up band resistance loss through connecing buffer amplifier again, after the waveform shake that the excision of edge trembling cut-off circuit causes because dry spring trembles, main amplifier is sent into after it, be amplified into Low Drift Temperature detector, the ultralow frequency square-wave modulation signal of the representative antennas signal power detected sends into DC preamplifier, through amplifying and sending into low frequency demodulation rear end by Large Copacity capacitance after adjustment zero level.

Low frequency demodulation rear end comprises signal path and road occurs modulated square wave: signal path is main integral synchronization integrator, two-phase phase detector, auxiliary integral passive integrator, DC output amplifier successively, and the DC level of the sign antenna signal strength after demodulation process is sent into digital display registering instrument and shown and store in order to aftertreatment, road occurs modulated square wave is that the 51.2KHz square wave that quartz oscillator produces becomes 12.5Hz square wave after 12 grades of CMOS binary dividers successively, 3 are obtained to the partly just anti-phase 12.5Hz square-wave signal in totally 7 tunnels after the 1st pair of positive output Shaping of 4 road CMOS two-channel function generator, wherein the 2nd 4 road CMOS phase inverters bufferings are sent into respectively to the 2 positive inversion signals in tunnel after supply main integral synchronization integrator and two-phase phase detector respectively, 3rd sends into 2 road inductive loads respectively to the 2 positive inversion signals in tunnel drives integrated package with the break-make of two the solenoid controlled aerial signals and terminator that drive three end modulators, 4th produces circuit to the overshoot excision control signal that the 2 positive inversion signals in tunnel send into 2 road CMOS monostable oscillators formations respectively through 2 road differentiating circuit, 1st pair of inversion signal then drives 1 road video driver to export as external synchronization signal.

In coal seam water radio measuring instrument of the present invention, 16 described Channel scan resonant mode total power radiometer receivers, comprise 16 road concentric cable ferrite antenna access ports, Single-chip Controlling 16 tunnel scanning resonant tank, aerial signal after resonant tank primary election sends into wideband low noise prime amplifier, after signal after prime amplifier amplifies sends into the high-frequency interferencing signal of tunable low pass filter more than filtering 1.5MHz, 3 frequency active band stop filter are sent into after the isolation of 5-10db fixed attenuator, filtering 10KHz, aerial signal after 15KHz and 100KHz signal, cushion through buffer amplifier, to amplify and after isolating out flip-flop, send into the 50Hz city electrical interference that the filtering of 50Hz rejection filter is possible, send into the main amplifier with adjustable threshold values AGC function to amplify, again through Low Drift Temperature detector, the signal detected is through video preamplifier adjustment direct current biasing and after amplifying, through passive integrator integration filtering noise, the DC level of the sign antenna signal strength after low drifting direct current amplifier amplifies is sent into digital display registering instrument and is shown and store in order to aftertreatment.

Connect with DC/DC transducer between described explosion-proof Ni-MH battery group and accurate stabilized voltage supply.Electric battery comprises+14.4V totally 12 joint rechargeable Ni-H 2 battery groups, and corresponding constant pressure and flow nickel-metal hydride battery charger; Give wide input range efficient DC/DC conversion isolation double voltage stabilizer (12V/ ± 15V, 12V/ ± 7V) with battery-powered, isolation is to make receiver circuit and battery or outer power supply insulate completely, to suppress common mode interference; Convert 4 road power supplys after voltage stabilizing through DC/DC and reach 10 to the 3 tunnel degree of stability of+11V ,+5.5V ,-5.5V ^-6the accurate stabilized voltage supply of magnitude is powered, and the latter still comprises corresponding EMI protection, filtering, decoupling, overheated, overcurrent and short-circuit protection circuit.

The leading indicator of radio radiation meter is sensitivity and gain stability.

The sensitivity of radio radiation meter characterizes with the degree (° K) in absolute temperature Kelvin scale, in order to measure the small difference of the radiation temperature of coal and water, the sensitivity of radio radiation meter at least reaches the magnitude of 1-5 ° of K, the sensitivity σ of coal seam water radio radiation meter of the present invention can reach 0.2 ° of K, namely can distinguish the temperature difference of 3 σ=3 × 0.2 ° K=0.6 ° K.

The gain stability of radio radiation meter weighs in the Relative percent change of the whole radio radiation gain in the unit interval (10 minutes, 30 minutes, 1 hour), generally to reach 1%-5%, the gain stability of coal seam water radio radiation meter Dick formula system of the present invention can reach ± and 0.25%/every 30 minutes.

Advantage of the present invention and remarkable result:

1, linearly receive: owing to have employed special circuit design, output and the coal seam water radio radiation of the machine are linear, its linear dynamic range reaches 40db, 60db can be reached through adjustable threshold values agc circuit, re-use calibration curve as calculated machine maintenance just can reach 80db, namely water-jet electric radiation measurement range can from-120dBm ~-40dBm.Instrument just can be exported reading by receiver absolute calibration and be demarcated as radiation temperature by this, then is demarcated as radiant flux by antenna gain aperture calibration, calibrates the relative water content that directly can be designated wet coal finally by water and the dry coal of the universe.And if Bian step-by-step counting, being then difficult to set up instrument exports the linear relationship with coal seam water radio radiation Strong degree, also just instrument can not be exported reading and be demarcated as water-jet electric radiation Strong degree.

2, two cover Double directional aerial combinations receive: board-like double antenna group and tubular type double antenna group, and the former is for the detection of coal seam section, and the latter is used for the top, tunnel of covering metal silk screen and the detection of side, both receive the radio radiation from coal seam water jointly by the Double directional aerial group be arranged on same plane or same axis, the accurate logarithm period plate aerial in broadband or low-loss height ε medium encapsulating big L/D ratio broadband helical antennal is encapsulated for one for inductance loads low-loss height ε medium, another (double or three times lengthenings) ferrite many segmented antenna tuning for Single-chip Controlling can switch piecemeal, the former and the latter have different antenna direction characteristics, both combine the direction finding that the common radiation received from coal seam water is conducive to coal seam water radio radiation source, differentiate useful signal, suppress interference, reduce false-alarm.And flat plane antenna or the helical antenna polarization characteristic different from ferrite antenna can be utilized to distinguish the polarization in coal seam water radio radiation source and then to segment its end face situation of meeting head on (end face is to development end or side to development end etc.).

3, hyperchannel multisensor receives: jointly receive the signal from same coal seam water-jet electric radiation source by double antenna group, because of its different reception system (modulation, total power), receive frequency range (500Hz-6.5MHz by the modulation receiving instrument be contained in same antidrip machine conjunction and total power receiving instrument; 200Hz-1MHz), receiving gain characteristic (linear gain, adjustable threshold values AGC gain), reception instant bandwidth (Whole frequency band 6.5MHz; Resonant tank bandwidth < 50KHz) and integral time (2S; 0.25S), realize hyperchannel multisensor and receive, false-alarm can be reduced widely by two-shipper output comparison and threshold values coincidence criterion, also more effectively can suppress interference simultaneously and more effectively observe useful signal form and parameter.

4,10 ° of direction findings: utilize the inductance in Double directional aerial group to add load-loss height ε medium encapsulating wide band logarithmic cycle plate aerial in medium wave and the antenna main lobe directivity of middle long wave and the 8-shaped directivity of ferrite many segmentations broad-band antenna, be as the criterion with antenna plane normal, respectively select a bit on the front both sides of face, respective rotary antenna finds out the angle of line between the antenna plane of coal seam water radio radiation maximum response and at 2, can obtain the orientation in coal seam water radio radiation source and the length of normal to line between 2 o'clock.Its direction finding precision can reach 10 °, and this index far exceedes reported in literature.

5, measure the coal seam water relative water content of coal seam water enrichment region: using gain stability reaches the ± linear receiving equipment of 0.5%/modulation system radio radiation hourly, to be calibrated by receiver Cooling and Heat Source and Antenna aperture calibration technology can measure the coal seam water radio radiation temperature that antenna receives exactly, the distance in antenna and source is obtained again by direction finding, actual measurement obtains the radiant flux that coal seam unit length attenuation coefficient can calculate coal seam water radiation source itself, and then match-drill actual measurement obtains the liquid water content of coal seam water enrichment region, the liquid water content relation of radiant flux and coal seam water enrichment region under a certain geology and coal seam conditions can be drawn.This method is also do not report in domestic and foreign literature.

6, all real time record of test data and storages, more high performance computer workstation easy to use carries out subsequent treatment and data readback, this is for stockpile, and finding geologic structure, seam construction characteristic, underground water and Bian pick regularity each other further has very high value.

More than comprehensive, coal seam water radio measuring instrument application of the present invention has the modulation receiving equipment of high-gain stability, can measure coal seam water radio radiation comparatively accurately; Two cover double antenna combinations, hyperchannel reception, adjustable threshold values AGC, synchronous integration etc. can differentiate interference effectively, reduce false alarm rate; Broadband radio is measured and narrow band resonances loop is measured, and provides coal seam water observation intuitively and early warning; The measurement of directive antenna two point achieves coal seam water enrichment region orientation and length of normal is measured, for detection of coal seam water provides new means.

Describe the present invention below in conjunction with specific embodiment.Protection scope of the present invention is not limited with embodiment, but is limited by claim.

Accompanying drawing explanation

Fig. 1, coal seam water radio measuring instrument overall block-diagram;

Wherein: 1, external 1 meter of long spire antenna, 2, the long ferrite antenna of external 16 segmentation 60cm, 3, external 0.5 meter of plate aerial, 4, the long ferrite antenna of external 16 segmentation 40cm, 5, Dick's formula receiver for radiometer rf modulations front end, 6, total power formula receiver for radiometer radio-frequency front-end, 7, Dick's formula receiver for radiometer radio demodulating rear end, 8, total power formula receiver for radiometer demodulation rear end, 9, 16 tunnel scanning resonant control circuits, 10, single chip machine controlling circuit, 11, DC/DC converts Voltage stabilizing module (12V/ ± 15V, 12V/ ± 7V), 12, accurate the stabilized voltage supply (+11V in three tunnels, ± 5.5V), 13, built-in explosion-proof rechargeable Ni-H 2 battery group (12 × 1.2V10AH), 14, external constant voltage constant current charging device, 15, two-way numerical monitor storage registering instrument 3.5 " LCD.

Fig. 2, coal seam water radio measuring instrument DICK formula broadband total intensity receiver for radiometer block scheme;

1, filter with low insertion loss video three end modulator, 2, wideband low noise prime amplifier, 3, tunable low pass filter, 4, isolation attenuator, 5, three frequency rejection filters, 6, buffer amplifier, 7, overshoot cut-off circuit, 8, accurate voltage control Amplifier, 9, temperature compensation multiplication of voltage wave detector and direct current zero amplifier, 10, main integral synchronization integrator, 11, two-phase phase detector, 12, passive integrator, 13, export direct current amplifier, 14, quartz oscillator, 15, ten secondary 2 frequency dividers, 16, four road two-channel function generator, 17, six inverter buffers, 18, two differentiating circuit, 19, overshoot cut-off circuit gating pulse produces circuit, 20, external synchronization signal impact damper, 21, two-way inductive load drive circuit, 22, input power filtering circuit.

Fig. 3, coal seam water radio measuring instrument 16 tunnel scanning resonance total power formula receiver for radiometer block scheme;

Wherein: 1,16 tunnel scanning resonant tanks, 2, single-chip microcomputer scanning resonant controller, 3, secondary wideband low noise prime amplifier, 4, tunable low pass filter, 5, attenuator is isolated, 6, three frequency rejection filters, 7, buffer amplifier, 8, civil power 50Hz rejection filter, 9, isolation attenuator, 10, adjustable threshold values AGC amplifier, 11, temperature compensation multiplication of voltage wave detector, 12, direct current zero amplifier, 13, passive integrator, 14, direct current amplifier is exported, 15, input power filtering circuit.

Fig. 4, coal seam water radio measuring instrument double channel A/D conversion and 3.5 inch LCD display block schemes;

Wherein: 1, dual input switching and sampling hold circuit, 2,10 bit A/D transducer, 3, data processing and control one-chip CPU, 4, internal memory, 5, liquid crystal display one-chip CPU and 3.5 " LCD, 6, export and control one-chip CPU, 7, stabilized voltage supply in machine.

Fig. 5, coal seam water radio measuring instrument board-like double antenna combination (accurate logarithm period flat plane antenna and the long ferrite antenna of 40cm) block scheme;

Wherein: 1, right 1 oscillator of accurate logarithm period flat plane antenna, 2, accurate logarithm period flat plane antenna coaxial-cable feeder, 3, loaded cable, 4, accurate logarithm period flat plane antenna lengthens oscillator, 5, left 1 oscillator of accurate logarithm period flat plane antenna, 6, two 20cm feerods bonding one-tenth 40cm feerod, 7, totally 16 segmented ferrite antenna windings, 8, ferrite antenna 16 fluorothene coaxial-cable feeder.

Fig. 6, coal seam water radio measuring instrument tubular type double antenna combination (big L/D ratio helical antenna and the long ferrite antenna of 60cm) block scheme;

Wherein: 1, tubular type antenna outer tube top seals, 2, tubular type antenna big L/D ratio helical antenna inner support insulation garden pipe, 3, tubular type antenna big L/D ratio helical antenna copper pipe winding, 4, high ε medium powder filling material, 5, tubular type antenna filter with low insertion loss insulating coating pipe, 6, butt-end packing in the middle of tubular type antenna outer tube, 7, tubular type antenna big L/D ratio helical antenna coaxial-cable feeder, 8, three 20cm feerod bonding one-tenth 60cm feerod, 9, totally 16 segmented ferrite antenna windings, 10, ferrite antenna 16 fluorothene coaxial-cable feeder, 11, tubular type antenna outer tube terminal surface seals.

Fig. 7, coal seam water radio measuring instrument chargeable battery group, DC/DC convert voltage stabilizing and accurate stabilized voltage supply block scheme;

Wherein: 1, debugging external power supply+15V, 2, built-in explosion-proof rechargeable Ni-H 2 battery group 12 × 1.2V, 7.5AH and overload protection arrangement, 3, external constant voltage constant current charging device, 4, external power supply plug special (antidrip), 5, internal power supply import and export socket (antidrip), 6, external charger plug special (antidrip), 7, complete machine is connected internal battery group plug special and to be held concurrently instrument power-on switch (antidrip), and 8, pulse suppresses, interference filter and overheated self-shield resistance, 9, DC/DC converts Voltage stabilizing module (+12V/ ± 15V, 15W), 10, EMI filtering circuit, 11, DC/DC converts Voltage stabilizing module (+12V/ ± 7V, 15W), 12, EMI filtering circuit, 13, positive and negative source of stable pressure starting protection circuit, 14, the pre-mu balanced circuit of+13V, 15, the pre-mu balanced circuit of-13V, 16, the accurate reference source (+5.00V) of high stability, 17, the accurate stabilized voltage supply of+11V high stability, 18, the accurate stabilized voltage supply of+5.5V high stability, 19,-5.5V follows the tracks of the accurate stabilized voltage supply of high stability, and 20, peak restrained, reverse protection and four-wire circuit, 21, peak restrained, reverse protection and four-wire circuit, 22, peak restrained, reverse protection and four-wire circuit.

Embodiment

Coal seam water radio measuring instrument of the present invention comprises 2 Iarge-scale system, i.e. DICK formula broadband total intensity radiometer system and 16 tunnels scanning resonant mode total power radiometer system, can be further subdivided into 6 subsystems:

1, plate aerial and board-like double antenna combination (Fig. 4) of ferrite antenna;

2, helical antenna and ferrite antenna tubular type double antenna combination (Fig. 5);

3, DICK formula broadband total intensity receiver for radiometer (Fig. 2);

4,16 tunnels scanning resonant mode total power radiometer receiver (Fig. 3);

5, A/D conversion, one-chip CPU and LCD display recorder (Fig. 6)

6, protected against explosion nickel-hydrogen chargeable cell group and external constant voltage constant current charging device, the double mu balanced circuit of DC/DC conversion and low-power consumption 10 ^-6the accurate stabilized voltage supply (Fig. 7) of magnitude degree of stability.

Referring to Fig. 1, coal seam water radio measuring instrument of the present invention specifically comprises DICK formula broadband total intensity receiver for radiometer, 16 tunnel scanning resonance total power formula receivers for radiometer, plate aerial and ferrite antenna board-like double antenna group, helical antenna and ferrite antenna tubular type double antenna group, A/D conversion, one-chip CPU (controlling and data processing) and LCD display and registering instrument, explosion-proof rechargeable Ni-H 2 battery group, DC/DC conversion voltage stabilizing and accurate stabilized voltage supply, and external constant voltage constant current charging device.Except two cover antenna sets, all respective being placed in altogether afterwards with the airtight shielding of the silver-plated shell of bilayer has in the antidrip shell of Transparence Display window, antenna sets is then each introduces antidrip shell with flame-proof explosion-proof cable A, B, C, D by two sealing adaptors, to adapt to high regimen underground coal mine requirements of one's work for two covers.The access numbering of two 19 core pressure terminals of two cover double antenna groups is identical, often overlap each own independent grounding end (1+1+16+1=19) of two antennas in antenna combination, therefore same ice detector antenna input socket can be shared, and can be switched easily with underground coal mine need of work, direct current Vent electric discharge road is had in machine, prevent electrostatic induction voltage from gathering, also prevent voltage Vent in antenna electric charge and machine from draining on antenna, to guarantee safety.

DICK formula broadband its block diagram of total intensity receiver for radiometer as shown in Figure 2, its input end (in) is the 50 Ω SMA sockets connecting plate aerial or helical antenna output cable, this SMA socket receives three end filter with low insertion loss (< 0.2db through semi-rigid cable, 0 ~ 7MHz) antenna input port of modulator, another input port of three end filter with low insertion loss modulators receives 50 Ω SMA sockets and external 50 Ω SMA precision loads through semi-rigid cable, after 12.5Hz square-wave frequency modulation, the output port of three end filter with low insertion loss modulators receives low noise high-gain prime amplifier (Nf:2db through semi-rigid cable, Gmax:37db) input end, this amplifier is for reducing 1/f noise and high frequency white noise and reducing DC shift, the first order have employed low noise J-FET differential pair tube (2N6484) and makes differential amplification and formed constant current source with silicon crystal triode to pipe, the second level have employed low noise J-FET differential pair tube equally and makes difference source follower, constitutes difference cascode collector altogether.For suppressing the right output common mode component of voltage of two-stage differential with the high frequency decline making low noise amplifier output terminal DC level be bordering on zero level and compensation J-FET cascode differential amplifier, Bian has used and has reached ± high cmrr instrument the amplifying circuit that forms of 0.02% high-accuracy resistance also in addition frequency compensation by two pieces of high-speed wideband low noise double operationals (EL2227) and four pairing precision, obtain almost from flat response and the mv level output offset of 0 ~ 6.5MHz, instrumentation amplifier output terminal receives the input end of multi-octave tunable low pass filter through semi-rigid cable, for reducing rear class noise, the multi-octave tunable low pass filter first order still Bian with high-speed wideband low-noise operational amplifier (OPA846), two or the three grade of adjustable lowpass filtering circuit based on analog multiplier for band frequency feedback, comprise broadband operational amplifier integrator, controllable gain amplifier (VCA810) and Unity-gain buffer level are formed, bandwidth can be changed by additional control voltage, can fh(-3db be obtained) from the adjustable low-pass filtering regulating effect of 10KHz ~ 14MHz, can hand adjustment also can control by computer program, gain G max:12db, its Buffer output receives the input end of 50 Ω isolation attenuators through semi-rigid cable, for regulation output level and the impact of isolation rear class, add film isolation attenuator, its damping capacity can select between 5 ~ 30db, isolation attenuator output terminal through semi-rigid cable receive multiple spot surely frequently interference fringe hinder the input end of active filter, in order to suppress to determine the interference of frequency long wave, the LORAN-C navigation 100KHz known, unknown long-wave communication 10KHz, 15KHz are suppressed, spy adds the second order active rejection filter be made up of high-speed wideband low noise double operational (EL2227) of these three frequencies, due to the even-order harmonic rejection ability of the synchronous phase detector of this modulation system receiver, for 50Hz(12.5 × 4=50Hz) first-harmonic of mains frequency and humorous wave interference need not be with and prevent system, and its output terminal receives the input end of broadband buffer amplifier through semi-rigid cable, in order to isolate and compensate loss and the mismatch of active filter, spy adds broadband isolation amplifier (the Δ f:0-60MHz that one-level high-speed wideband low-noise operational amplifier (OPA846) is formed, Gmax:16db), its output terminal receives the input end of main amplifier through semi-rigid cable, the signal being input to main amplifier sends into the modulated square wave forward position upper punch cut-off circuit be made up of wide-band bidirectional cmos analog switch (43113) after buffering, excise gating pulse by overshoot to control, excise because dry spring when modulator switch closes repeatedly is beated the shake waveform in the square wave envelope forward position of causing, the control end of analog switch receives through semi-rigid cable the output terminal that modulated square wave upper punch excision gating pulse produces circuit, the output terminal of analog switch is connected to the program-controlled great dynamic range main amplifier (VCA810) based on analog multiplier, can programmed control also can be manual, gain variation range reaches+35db ~-35db, main amplifier passband is high-end reaches 20 ~ 30MHz, Gmax can reach 60db, main amplifier receives the input end of Double deference to pipe multiplication of voltage wave detector with semi-rigid cable after unity gain buffer, Low Drift Temperature wave detector is the multiplication of voltage detecting circuit that ultrahigh frequency Double deference that 4 the silicon crystal triodes be encapsulated in a shell all connect into cb-e knot compensates pipe (2FC2C) the band temperature compensation that forms and silicon diode starting potential, and the effective input voltage range of its detection can from 20 ~ 600mV.Thereafter be the video amplifier that forms of wideband low noise amplifier (OPA27) that band output offset regulates, can being biased to≤1mV without regulation output during input voltage.Voltage gain about 3 times, it exports the input end receiving synchronous integrator through semi-rigid cable; The synchronous integration circuit be made up of two broadband CMOS bilateral analog switch (43113) and wideband low noise amplifier (OPA27), two control ends of analog switch receive homophase and the reversed-phase output of bi-phase modulated square-wave generator respectively, its driving is synchronous with modulated square wave, greatly can suppress with modulated square wave nonsynchronous interference and noise signal, greatly the antijamming capability of Strong modulation system radiation receiving equipment.Signal sends into the two phase synchronous phase detection circuit that two broadband cmos analog switch (43112,43113) is formed with wideband low noise amplifier after synchronous integration, under the control signal effect synchronous with modulated square wave, useful signal is demodulated from modulated square wave envelope, export the direct current signal of a representative antennas input signal Strong degree after being amplified by the in-phase amplifier of 10 times of gains after passive integrator (1S) accumulation again, deliver to A/D input end.Modulated square wave signal generator is by quartz oscillator, ten secondary 2 frequency dividers (CD4040), four road two-channel function generator (CD4041), six inverter buffers (CD4069), two differentiating circuit, modulated square wave upper punch excision pulse-generating circuit (CD4098), external synchronization signal impact damper (OPA27), two-way inductive load drive circuit (MDC3105), the formations such as input power filtering circuit, be specifically designed to and produce two-phase 12.5Hz modulation driving square wave (for three end modulators), 2 tunnel two-phase 12.5Hz square waves (for synchronous integration and synchronous detection dual analog switch) and 12.5Hz turnable pulse width and adjustable delay modulated square wave upper punch excision gating pulse (for the main modulated square wave upper punch cut-off circuit put).

16 its block diagram of Channel scan resonant mode total power radiometer receiver as shown in Figure 3, from 16 polytetrafluoroethylcable cables that 16 sections of sectional coil 40cm or 60cm long Mn-Zn ferrite bar antennas come, after 19 core cable sockets, one of 16 coaxial dry reed switch of program-controlled multiple spot low insertion loss broadband coaxial dry spring switch type mechanical tuning circuit is connected respectively through concentric cable, coaxial dry reed switch all in parallel with 4 one after the whole parallel connection in other end of 16 coaxial dry reed switch is connected, the other end of 4 coaxial dry reed switch connects the low-loss tuning capacitance with different capabilities respectively, 20 overcoats are with the coaxial dry reed switch of solenoid altogether, whether solenoid conducting is its basic conducting control module by 20 relay inductive load drive integrated circults (MDC3105), this integrated circuit (MDC3105) control input end connects the Shift outputs of the high-speed cmos shift register (74HC595) of single-chip microcomputer (AT89C2051) step-scan control voltage generation unit.Receive sub-miniature A connector as ferrite antenna frequency-selecting tuning operation through concentric cable after the whole parallel connection of one head of 20 coaxial dry reed switch, after semi-rigid cable and sub-miniature A connector, receive low noise junction field effect differential pair tube (2N6484) differential input end of low noise high-gain prime amplifier; Single-chip microcomputer front end Frequency Selection Controller is made up of CMOS single-chip microcomputer (AT89C2051) and 2 pieces of high-speed cmos shift registers (74HC595), external synchronization signal can be accepted control, also can produce the conductivity control signal of 16+4=20 road MDC3105 altogether voluntarily, 16 × 4=64 or 16 × 1=16 resonant tank can be formed.Outer synchronous single-chip microcomputer front end Frequency Selection Controller is connected with 20 polytetrafluoroethylcable cables with between coaxswitch formula mechanical tuning circuit; Low noise high-gain prime amplifier is made up of the two-stage low noise junction field effect difference cascode high cmrr instrumentation amplifier circuit that collector (2N6484) and two-stage low noise double operational (EL2227) are formed altogether, and instrumentation amplifier output terminal receives the input end of multi-octave tunable low pass filter device through semi-rigid cable; Multi-octave tunable low pass filter is formed by inputting Hyblid Buffer Amplifier (OPA846) broadband operational amplifier integrator (OPA820), controllable gain amplifier (VCA810) and Unity-gain buffer level, can change bandwidth by additional control voltage, its Buffer output receives the input end of 50 Ω isolation attenuators through semi-rigid cable; Controlled isolation attenuator is made up of book film integrated circuit, and its decay can adjust between 10 ~ 30db, and its output terminal receives the input end of 3 the fixed resistance of interference fringe frequently active filters through semi-rigid cable; In order to suppress to determine the interference of frequency long wave, suppressed for the LORAN-C navigation 100KHz known, unknown long-wave communication 10KHz, 15KHz, spy adds the second order active rejection filter be made up of high-speed wideband low noise double operational of these 3 frequencies.3 the fixed resistance of interference fringe frequently active filters form 3 grades of active second order bandstop filter by six pieces of double operationals (EL2227), to suppress 15KHz, 10KHz, 100KHz undesired signal to be passed through, its output terminal receives the input end of broadband buffer amplifier through semi-rigid cable; Broadband isolation amplifier (the Δ f:0-60MHz that one-level high-speed wideband low-noise operational amplifier (OPA846) forms is added in order to isolate and compensate the loss of active filter and mismatch spy, Gmax:16db), its output terminal receives the input end of the active second order bandstop filter of 50Hz through semi-rigid cable, disturbs first-harmonic to suppress 50Hz civil power; The output terminal of the active second order bandstop filter of 50Hz receives the input end of 50 Ω 5db isolation attenuators through semi-rigid cable; This isolation attenuator is that its output terminal receives the input end of great dynamic range adjustable threshold values AGC main amplifier through semi-rigid cable in order to isolate rejection filter to the impact of adjustable threshold values AGC main amplifier; Great dynamic range is adjustable, and threshold values AGC main amplifier is made up of small capacitances integral contrast device and wave detector, controllable gain amplifier (VCA810) and Unity-gain buffer level, small capacitances integral contrast device compares controllable gain amplifier and exports the difference with adjustable threshold values AGC initial level, the gain control end accessing controllable gain amplifier after detection realizes adjustable threshold values AGC effect, and unity gain buffer output terminal receives the input end of Low Drift Temperature Double deference to pipe multiplication of voltage wave detector with semi-rigid cable; Double deference forms by the ultrahigh frequency Double deference all connecting into cb-e knot the multiplication of voltage wave detector being with temperature compensation to pipe multiplication of voltage wave detector to pipe (2FC2C), the video amplifier that the wideband low noise amplifier (OPA27) that rear tape splicing output offset regulates is formed, can being biased to≤1mV without regulation output during input voltage.Voltage gain about 3 times.It exports the input end receiving passive integrator; The integrating circuit that passive integrator is 0.25S by time constant is formed, after integration, send into the Low ESR exporting a representative antennas input signal Strong degree after the DC output amplifier of 10 times of voltage gains that has formed with wideband low noise amplifier (OPA27) export direct current signal, namely the output of whole 16 Channel scan resonant mode total power radiometer receivers, receives the input end of the total power A/D of data processing display device through semi-rigid cable and sub-miniature A connector.

Coal seam water-jet electricity Measuring measures instrument double channel A/D conversion and 3.5 inch LCD digital indicators and record storing apparatus and sees Fig. 4, comprises dual input switching and sampling hold circuit, 12 bit A/D transducer, data processing and control one-chip CPU, internal memory, liquid crystal display one-chip CPU and 3.5 " LCD, export and control one-chip CPU with interior voltage-stabilized power supply; The display of two-way 12 digital bit can be carried out to the output DC level of DICK formula broadband total intensity receiver for radiometer and 16 roads scanning resonant mode total power radiometer receiver simultaneously, i.e. two-way ± 5.000V display, and can record and be stored in USB flash disk, conveniently to read.Also can export by USB port numeral or export with analog interface electric current.

Plate aerial and ferrite antenna combination block figure are shown in Fig. 5, and this antenna sets is the long and medium wave directional antenna group of double antenna.Double antenna system encapsulates inductance by the low-loss height ε medium that is installed together and wears meander line and extend the accurate logarithm period plate aerial of oscillator and Single-chip Controlling and can the section of satisfying switch 16 segment of double and doubly lengthen (40cm) manganese-zinc ferrite body antenna and jointly form Double directional aerial and receive, and plate aerial is connected with the SMA antenna input socket of modulation instrument through 19 core seal sockets of antidrip shell by fire-retardant co-axial cable, ferrite antenna is then connected with 19 core antenna input sockets in total power instrument by the same 19 core seal socket A of 16 SFF-50-1.5 cables through antidrip shell.Two kinds of antennas all have directivity more than the middle-end of frequency acceptance band, utilize the low-loss height ε medium in Double directional aerial to encapsulate inductance and wear meander line and extend the surface level antenna that oscillator accurate logarithm period plate aerial realizes 10 ° in the 8-shaped directivity that the antenna main lobe directivity of medium wave and middle long wave and many segment of double doubly lengthen manganese-zinc ferrite antenna and locate and utilize and can carry out Received signal strength measuring polarization characteristics by half-twist in the vertical direction; And utilize triangulation location to place antenna at baseline two-end-point in a distance, measure the angle of line between source and respectively at 2, know that base length can obtain the orientation of coal seam water enrichment region and the length of normal to baseline.

Fig. 6 is shown in by long spire antenna and ferrite antenna prescription block diagram, and this antenna sets is the long and medium wave directional antenna group of double antenna.Tubulose double antenna system is by being arranged in a low high-frequency loss medium garden pipe and being placed in low-loss height ε medium on same axis up and down and encapsulating big L/D ratio helical antenna and Single-chip Controlling and can the section of satisfying switch Double directional aerial that 16 sectional coil 3 times lengthenings (60cm) manganese-zinc ferrite body antenna forms jointly and receive and combine, and two kinds of antennas all have directivity more than the middle-end of frequency acceptance band.The axial length of big L/D ratio helical antenna is 1m, screw diameter is about 4cm, φ 3mm hollow copper tube interval 3mm is used to be wound in the bead of the low high-frequency loss medium tube of hollow thread, about 165 circles, its total length is about 20.7m, and helical antenna is connected with the SMA antenna input socket of modulation instrument by the 19 core seal sockets of fire-retardant co-axial cable through antidrip shell.The top of tubular antenna, middle-end and end all glue together with fluid sealant and medium tube and are waterproof.

For the selection of 16 sectional coil ferrite bar antennas, comprise the material of feerod and the selection of winding method: the material of feerod can be divided three classes substantially: shortwave ferrite (Ma-Zn material, magnetic permeability mu are applicable to 1-20MHz below 50, comparatively), medium wave ferrite (Mn-Zn material, magnetic permeability mu are applicable to 0.4MHz-2MHz between 50-800, comparatively), long wave ferrite (Mn-Zn material, magnetic permeability mu are applicable to below 100KHz more than 1000, comparatively).In order to cover the wide frequency range from 1KHz to 1MHz, preferred Bian Mn-Zn medium wave feerod.Because the magnetoconductivity of medium wave bar magnet is not high enough, need the hundreds of thousands of circle of coiling when the coil winding of coiling 10KHz magnitude, cause distributed capacitance and leakage inductance too large, so the present invention adopts the way of segmentation coiling, whole coil is divided into 60 sections, centre tap of all connecting, totally 16 windings.Introduce in antidrip casing through 19 core seal sockets with 16 polytetrafluoroethylcable cables respectively.Connect 16 coils by Single-chip Controlling 16 filter with low insertion loss coaxswitches are then individual again, control 4 filter with low insertion loss coaxswitches connection 4 low high-frequency loss electric capacity then, the scanning realizing 16 resonant tanks between 0.5-1000KHz is fixed tuning simultaneously.

Because Boltzmann radiation is a kind of heat radiation of white noise formula, the full frequency band of the topped electromagnetic radiation of its frequency range in theory, namely from extremely low frequency to extremely high frequency, but due to the absorption of coal rock layer, the signal of upper frequency almost loses totally the sixth of the twelve Earthly Branches when arriving receiving antenna, and the signal only having frequency lower can receive.For the measurement of coal seam water radio radiation signal, most signal, all at below 300KHz, is removed beyond medium wave broadcast signal and part high reject signal at more than 300KHz and is seldom received useful signal.Can determine, for coal seam water analyzer, electric signal receive frequency range is between 200Hz-6.5MHz, and mainly concentrates on below 300KHz.

In general, in Antenna Design, seemed an off the record agreement, wire antenna when namely frequency is low, surface antenna during frequency height, the length of wire antenna will reach more than λ/10-λ/20 just higher receiving efficiency.500Hz-5MHz frequency translation is wavelength is 600000m-60m, and obviously, the antenna that energy high-level efficiency receives 60 myriametre wavelength signals is at all unpractical.The present invention adopts class element antenna, is produced in the space of 0.5m × 0.5m, then this Antenna Operation is about 5m and 60MHz in the wavelength of λ/10; After using folding oscillator, this folding element antenna is expected for 10m and 30MHz; After re-using meander line, this meander line folding element antenna is expected for 20m and 15MHz; After being aided with inductance loading method, this inductance loads meander line folding element antenna and is expected for 50m and 6MHz; Due to 1/ ε that electromagnetic wave phase velocity is in media as well in vacuum ^1/2, then according to high ε medium cladding, this antenna likely works in 50 × ε to make us acceptable receiving efficiency ^1/2wavelength on, if lower efficiency, likely work about 10KHz.

The axial length of helical antenna is 1m, screw diameter is about 4cm, use φ 3mm hollow copper tube interval 3mm coiling, about 165 circles, its total length is about 20.7m, as simulated whiplike Antenna Operation state, is then likely operated on 200m wavelength in λ/10, then according to high ε medium cladding, this antenna likely works in 200 × ε to make us acceptable receiving efficiency ^1/2wavelength on, if lower efficiency, likely work about 5KHz.

The antenna holder of the subsidiary compass of described Patcho antenna group, has position angle and luffing angle instruction.

Coal seam water radio measuring instrument chargeable battery group, DC/DC convert voltage stabilizing and accurate stabilized voltage supply is shown in Fig. 7 :+15V the external power interface specializing in debugging; Built-in power uses 12 × 1.2V, 7.5AH containing the explosion-proof rechargeable Ni-H 2 battery group of overload protection arrangement; For the external constant voltage constant current charging device of internal battery group charging; Electric battery is powered to two DC/DC conversion Voltage stabilizing module (+12V/ ± 15V, 15W by pulse suppression, interference filter and overheated self-shield resistance; + 12V/ ± 7V, 15W); The output of DC/DC is after EMI filtering circuit, the positive and negative pre-source of stable pressure of ± 15V supply ± 13V and start-up circuit, should ± the positive and negative pre-source of stable pressure of 13V is that the accurate amplifier of the accurate stabilized voltage supplys of all 3 tunnel high stabilities is powered, wherein+13V exports and also supplies high stability accurate reference source (+5.00V, 10PPM); The output of DC/DC is after EMI filtering circuit; + 15V wherein also supplies+11V high stability accurate stabilized voltage supply; ± 7V then follows the tracks of the input power of the accurate stabilized voltage supply of high stability respectively as the accurate stabilized voltage supply of+5.5V high stability and-5.5V; the output terminal of the accurate stabilized voltage supply (+11V, ± 5.5V) of 3 tunnel high stability is added with peak restrained, reverse protection and four-wire circuit respectively, and the output of the accurate stabilized voltage supply of 3 tunnel high stability all can reach 10 ^-6the voltage-regulation coefficient, 10 of magnitude ^-5under the current stability, of magnitude and room temperature and steady load every 30 minutes 10 ^-5the voltage drift stability of magnitude.

For improving antijamming capability, coal seam water radio measuring instrument of the present invention have employed triple-shielded: each individual components is placed in independent silver-plated copper closing machine conjunction; Each subsystem is placed in independent silver-plated copper sealing machine shell; All subsystems are shelved and are placed in the antidrip shell of steel.Explosion-proof Ni-MH battery assembles the fire-retardant encapsulation of menopause edge in groups and floatingly is independently placed in copper can afterwards.Electric battery lead-in wire is introduced in DC-DC conversion and DC stabilized voltage supply casing through feedthrough capacitor, and DC stabilized voltage supply exports and all introduces each subsystem casing through feedthrough capacitor again, and each individual components all introduces power supply through feedthrough capacitor again.All connect through gold-plated sub-miniature A connector and semi-rigid cable again between all subsystem casings.Subsystem gold-plated sub-miniature A connector and flame retardant high-frequency cable are connected with double antenna after flame proof seal head.Shielding strict like this, not only greatly inhibit from space outerpace industrial noise, medium short wave broadcast interference, also the spatial impression cut off admirably between each individual components, each subsystem is answered, power supply crosstalk, thus significantly reducing the potential gain instability of system, the system that improves is receiving the virtual rating faintly descending water-jet electric signal.

The present invention is used for coal mine underground coal bed water-jet electric radiation source and measures, and its concrete use procedure comprises the following steps:

1, measure with or without coal seam water radio radiation: the driving face (being generally workplace centre position) the coal seam water radio measuring instrument with antidrip shell including totally 6 equipment being placed in colliery, plate aerial and ferrite antenna are aimed at rib, as both modulation and the output of total power two passage all have instruction, then show to have received signal.

2, judge to be coal seam water radio radiation signal: left rotation and right rotation plate aerial and ferrite antenna observe the modulation on LCD and total power export reading simultaneously at leisure, the strongest when being confirmed whether to aim at rib position, in this way, be then from coal seam water radio radiation mostly; Otherwise, be that interference or antenna radiation pattern have problem mostly.(this survey method is only applicable to present low gas or without fiery colliery, otherwise wants another method to measure).

3, coal seam water radio radiation source side position and distance is measured: one end A point radio measuring instrument being placed in the driving face in colliery, the angle [alpha] that the output maximal value in source is surveyed determined by baby compass on nationality antenna, the other end B point being placed in driving face again measures angle beta in accordance with the law, if AB distance is L _a, then source is l=L to the vertical distance of L _a× tg α tg β/tg α+tg β.

4, the radiation temperature in coal seam water radio radiation source is measured: be placed in by radio measuring instrument on the intersection point point that namely distance coal seam water radio radiation source is nearest of L and the l of the driving face in colliery, by the position in antenna alignment source, the radiation temperature value (through Cooling and Heat Source calibration and Antenna aperture calibration) can seeing source on LCD of staying a minute.

5, the change in continuous surveillance coal seam water radio radiation source and early warning coal seam water are gushed out danger: the emission types (stable state, unstable state, move fast) roughly judging coal seam water radio radiation source, and whether increased fast by continuous surveillance total power output reading, judge coal seam water radio radiation source region geology change severe degree, as the two (modulation, total power) increase all fast Strong then hummer send early warning sound.

6, for the coal face having wire gauze to block or scar or wall, then must bore upright opening on tested surface, aperture is about φ 60mm, hole depth is about 1.8m, uses tubular type antenna sets to stretch in hole until bottom, and the feeder line of tubular type antenna sets is replaced Patcho antenna access coal seam water radio measuring instrument, slightly wait upon a moment, after digital display stable reading, read reading, and repeat the operation steps of above-mentioned 1-5, only need to bore pitch of holes L with two antennas _breplace L _a.

7, by the half-mark of water and dry coal to be determined in unit distance both radio radiation value, by the measured data that decays to the coal seam of different moisture content on certain distance and water, coal seam water radiation temperature set up to the measured data that ultralow frequency radiation is decayed, hang down apart from, relation formula between thickness of coal seam and coal seam water cut and mathematical model, directly on LCD, show coal seam water cut after numerical evaluation.

8, after upper well on mass computing workstation playback of data depositing, overall treatment is carried out after accumulation several times, obtain the steady state of radiation temperature in coal seam water radio radiation source, the Boltzmann temperature in coal seam water radio radiation source is obtained in conjunction with geologic data and coal seam water cut measured data, and reverse interpretation coal seam water enrichment region physical state.

Claims (9)

1. a coal seam water radio measuring instrument, it is characterized in that, described coal seam water radio measuring instrument comprises binary channels low frequency and ultralow frequency radiation meter and two groups of double antenna groups, described binary channels low frequency and ultralow frequency radiation meter, passage one is DICK formula broadband total intensity receiver for radiometer, and its 3db bandwidth is 500Hz ~ 6.5MHz; Passage two is 16 Channel scan resonant mode total power radiometer receivers, and its 16 Channel scan resonant tank centre frequency is 200Hz ~ 1.05MHz; Two groups of double antenna groups are respectively board-like double antenna group and helical antenna that plate aerial and ferrite antenna form and the tubular type double antenna group that ferrite antenna forms; Described coal seam water radio measuring instrument also comprises A/D conversion, numerical monitor and registering instrument, explosion-proof rechargeable Ni-H 2 battery group, DC/DC translation circuit and high-accuracy stabilized voltage supply;

Described board-like double antenna group is made up of 16 segmented ferrite antennas of 0.5 meter of square plate aerial and 0.4 meter long, and ferrite antenna is parallel to be installed on above plate aerial frame, and both can make level on antenna mount or pitching rotates; Described plate aerial is that be placed in interior, the high ε medium powder cladding of the flat square box of low loss dielectric, that inductance loads accurate logarithm period flat plane antenna, and its antenna main lobe is perpendicular to antenna plane; Described ferrite antenna is that 16 tapped-windings are wound on the long feerod of 40cm, and 16 combination coaxial cables are drawn, and carry out tuning frequency-selecting by Single-chip Controlling tuning capacitance; Antenna radiation pattern is 8-shaped.

2. coal seam water radio measuring instrument according to claim 1, it is characterized in that, described tubular type double antenna group is made up of helical antenna and segmentation coiling ferrite antenna, ferrite antenna and helical antenna are coaxial and be installed on long spire antenna rear end, and both are all placed in low loss dielectric hollow circular-tube.

3. coal seam water radio measuring instrument according to claim 2, is characterized in that, described helical antenna is the big L/D ratio 1M helical antenna being placed in low loss dielectric pipe front end, being cladded by high ε medium powder, and its antenna main lobe points to front; Described ferrite antenna is placed in low loss dielectric pipe rear end, and 16 tapped-windings are wound on the long feerod of 60cm, and 16 combination coaxial cables are drawn, and carry out tuning frequency-selecting by Single-chip Controlling tuning capacitance, antenna radiation pattern is 8-shaped.

4. coal seam water radio measuring instrument according to claim 1, it is characterized in that, described DICK formula broadband total intensity receiver for radiometer, comprise antenna access port, the signal of plate aerial and helical antenna accesses three end modulators through antenna access port and terminator, aerial signal access band low noise prime amplifier after square-wave frequency modulation, connect after tunable low pass filter filters radio-frequency component after amplifying, 3 frequency rejection filters are accessed after the isolation of 5db or 10db attenuator, through 10KHz, modulation aerial signal after system prevented by 15KHz and 100KHz band connects buffer amplifier again and amplifies to make up band resistance loss, thereafter main amplifier is sent into after connecting the shake of edge trembling cut-off circuit excision waveform, be amplified into Low Drift Temperature detector, the ultralow frequency square-wave modulation signal of the representative antennas signal power detected sends into DC preamplifier, through amplifying and sending into low frequency demodulation rear end by Large Copacity capacitance after adjustment zero level, low frequency demodulation rear end comprises signal path and road occurs modulated square wave, signal path comprises main integral synchronization integrator, two-phase phase detector, auxiliary integral passive integrator, DC output amplifier successively, and the DC level of the sign antenna signal strength after demodulation process sends into numerical monitor and registering instrument.

5. coal seam water radio measuring instrument according to claim 4, it is characterized in that, road occurs described modulated square wave is quartz oscillator successively, its 51.2KHz square wave produced becomes 12.5Hz square wave after 12 grades of CMOS binary divider frequency divisions, 3 are obtained to the partly just anti-phase 12.5Hz square-wave signal in totally 7 tunnels after the 1st pair of positive output Shaping of 4 road CMOS two-channel function generator, wherein the 2nd 4 road CMOS phase inverters bufferings are sent into respectively to the 2 positive inversion signals in tunnel after supply main integral synchronization integrator and two-phase phase detector respectively, 3rd sends into 2 road inductive loads respectively to the 2 positive inversion signals in tunnel drives integrated package with the break-make of two the solenoid controlled aerial signals and terminator that drive three end modulators, 4th produces circuit to the overshoot excision control signal that the 2 positive inversion signals in tunnel send into 2 road CMOS monostable oscillators formations respectively through 2 road differentiating circuit, 1st pair of inversion signal then drives 1 road video driver to export as external synchronization signal.

6. coal seam water radio measuring instrument according to claim 1, it is characterized in that, 16 described Channel scan resonant mode total power radiometer receivers, comprise 16 road concentric cable ferrite antenna access ports, Single-chip Controlling 16 tunnel scanning resonant tank, aerial signal after resonant tank primary election sends into wideband low noise prime amplifier, after signal after prime amplifier amplifies sends into the high-frequency interferencing signal of tunable low pass filter more than filtering 1.5MHz, 3 frequency active band stop filter are sent into after the isolation of 5-10db fixed attenuator, filtering 10KHz, aerial signal after 15KHz and 100KHz signal, cushion through buffer amplifier, to amplify and after isolating out flip-flop, send into 50Hz rejection filter filtering 50Hz city's electrical interference, send into the main amplifier with adjustable threshold values AGC function to amplify, again through Low Drift Temperature detector, the signal detected is through video preamplifier adjustment direct current biasing and after amplifying, access passive integrator integration filtering noise, again after low drifting direct current amplifier amplifies, the DC level characterizing antenna signal strength sends into numerical monitor and registering instrument.

7. coal seam water radio measuring instrument according to claim 1, is characterized in that, described explosion-proof rechargeable Ni-H 2 battery group comprises+14.4V totally 12 joint rechargeable Ni-H 2 battery groups, and corresponding constant pressure and flow nickel-metal hydride battery charger; Explosion-proof Ni-MH battery group is connected with 12V/ ± 15V, 12V/ ± 7VDC/DC translation circuit with between accurate stabilized voltage supply; 4 road power supplys after voltage stabilizing are converted to+11V ,+5.5V, the accurate stabilized voltage supply in-5.5V3 road through DC/DC.

8. coal seam water radio measuring instrument according to claim 7, is characterized in that, described accurate stabilized voltage supply degree of stability reaches 10 ^-6magnitude, also comprises EMI protection, filtering, decoupling, overheated, overcurrent and short-circuit protection circuit.

9. coal seam water radio measuring instrument according to claim 1, it is characterized in that, in described coal seam water radio measuring instrument, except antenna sets, all respective being placed in altogether afterwards with the airtight shielding of the silver-plated shell of bilayer of each parts has in the drip-proof type sealing metal shell of metal-coated membrane glass window, and antenna sets introduces antidrip sealing metal shell with flame-proof explosion-proof cable by sealing adaptor.