CN205620558U - Old dead zone detecting device in mine - Google Patents

Abstract

The utility model discloses an old dead zone detecting device in mine, including cable probe connector spare, leading interface module, signal conditioning conversion module, DSP processing module, its characterized in that is received the distribution electric field signal that natural electromagnetic wave formed on the earth's surface and is transmitted to leading interface module by the orderly cable probe connector spare of connecting of multistage behind old dead zone reflected refraction, the signal is by leading interface module, signal conditioning conversion module carries DSP processing module, DSP processing module collection save data are kept supplying machine -readable the getting in position and are done further analysis and draw old dead zone diagnostic information direct indication and give the user, still export logic control signal to signal conditioning conversion module, leading interface module's control end. The utility model has the advantages of the diagnostic information of old dead zone is effectively received and has drawed to the device, in view of the above the tax of the old dead zone of analysis deposit the degree of depth, size, state, survey as a result only, positioning accuracy is high, can extensively be used for the exploration and the prevention and cure of the old dead zone in mine.

Description

Mine old Exhausted area prospecting device

Technical field

This patent relates to the geophysical prospecting equipment of underground hole exploration, a kind of for mine the device of old Exhausted area prospecting.

Background technology

Old dead zone refers to the general name of the goaf formed after mining mineral resource, old kiln and abandoned well.In the 80's of last century, many mines all use " house column type " or the big gun mining method of " lane pillar " more fallen behind, little kiln, small coal mines spread all over the place, and mine excavation is without design, ND, no record, and the goaf scope of little kiln and state all do not have itemized record and data.According to field investigation, these some top boards of old dead zone are caving, cause surface subsidence；Some top board is not yet caving, and can't see old dead zone from earth's surface and exists；Some old dead zone spontaneous combustion, some old dead zone catches fire；Some old dead zone hydrops etc.；The problems referred to above will bring great potential safety hazard for levels and adjacent domain exploitation.During 28 days 13 March in 2010 40 points, there is water leak accident in ore deposit, Zhong Mei group Hua Jin coking coal company Wang Jia ridge, cause the 153 stranded down-holes of people, through preliminary infer precisely due in tunneling process through with original old dead zone hydrops caused, although rescuing extremely successful, but the loss caused is huge, thus also result in severe social influence.Therefore, the detection of old dead zone has caused the great attention of society and mine industry.

As a example by colliery, ocurrence of coal seam is in the coal measure strata that stratification is distributed, and coal seam forms goaf after being produced, and destroys original stress equilibrium state.When productive area is less, owing to abandoned coal pillar is more, pressure is transferred on coal column, does not causes ground subsidence, deformation, and goaf preserves with the empty form of water-filling or not water-filling；But most goafs are under gravity and reservoir stress effect, top board slump, formation caving zone, fissure zone and curved bel.The change of these geologic(al) factors, the geophysical character making goaf and upper formation thereof there occurs notable change, mainly showing themselves in that 1) coal seam goaf caving zone is compared with complete stratum, lithology becomes to loosen, degree of compaction reduces, the apparent resistivity of the loose material of its internal filling, apparently higher than surrounding medium, shows as high resistant abnormal electrically；Coal seam goaf fissure zone is compared with complete stratum, and lithology does not occur significantly to change, but due to the cranny development of rock in fissure zone, the air that is filled with in crack causes electric conductivity to reduce, and the most also shows as high resistant abnormal；If coal seam goaf caving zone and fissure zone have water to inject so that loose Fractured zone fills the degree that moisture reaches saturated, the electrical conductivity that can draw this region increases sharply, and shows as its apparent resistivity value and is significantly lower than surrounding medium, shows as low-resistance electrically abnormal；This application being electrically changed to so that conductivity difference is the methods such as the application high-density electric of premise, transient electromagnetic method and magnetotelluric method provides geophysics application premise.2) coal seam goaf is compared with complete stratum, and stratum becomes loose, and the density of medium reduces, and makes propagation decline in seimic wave velocity therein simultaneously.No matter and it is by what medium institute filling, all there is an obvious natural impedance reflecting interface in its edge, in goaf there is obvious difference in the velocity of wave of medium and surrounding rocks；Utilize old dead zone, the detectable colliery of this physical premises.Old dead zone, colliery ground location technology mainly includes geophysical prospection and boreholes drilling method at present.Boreholes drilling method, as one detection method the most intuitively, has the advantage that detection accuracy is high, but boreholes drilling is " a peephole view " after all, and the shortcoming that quantities is big, progress is slow, span of control is little is also evident from.Therefore, old dead zone, colliery ground location often uses based on geophysical prospecting method, and drilling verification is auxiliary technical method.The method of old dead zone, colliery ground location comparative maturity mainly has following 4 kinds at present.

(1) high-density electric

High Density Resistivity is a mutation of conventional resistive rate method, for its principle, is still the class exploitation method based on the electrical property difference of rock.Infer whether old dead zone, colliery exists by the regularity of distribution of the artificial underground consistent electric field set up of observation and research.Its a kind of array exploitation method, only whole electrodes (tens to up to a hundred) need to be placed on measuring point during field measurement, then program control electrode change-over switch and microcomputer engineering electrical measuring instrument is utilized to realize the rapidly and automatically collection of data, after measurement result is sent into microcomputer, also data can be processed and provide the various graphical results about geoelectric cross section distribution.

(2) transient electromagnetic method

Transient electromagnetic method, it is called for short T EM, belong to type electromagnetic induction detection method, it follows electromagnetic induction principle, its mechanism is exactly the vortex field effect that conducting medium produces under the electric field excitation of Spline smoothing, an earth-free loop line or magnetic dipole (can also be with ground connection line source electric dipole) is i.e. utilized to launch pulse electromagnetic wave to underground as exciting field source (being referred to as " primary field " traditionally), according to Faraday law of electromagnetic induction, after pulse electromagnetic wave terminates, stratum or geologic objective body (old dead zone, colliery) are under the effect of exciting field (i.e. " primary field "), the eddy current inducted can be produced inside it, produce electromagnetic field (being referred to as " secondary field " traditionally), this eddy current has spatial character and time response.By observation and the spatial characteristics of research " secondary field " and time response, interpreting formation or the geometry of old dead zone and physical property characteristic can be speculated.

(3) magnetotelluric method

Magnetotelluric method belongs to a kind of Magnetotelluric System that part controllable source combines with natural source, natural background field source imaging (MT) is passed through in infrastructure, its information source is 10Hz～100kHz, shallow structure then launches 1k～100kHz artificial electromagnetic signal by a novel portable low power emitter, compensate the deficiency of natural signals, thus obtain high-resolution imaging.

(4) shallow earthquake method

Shallow earthquake method Main Basis is by following the trail of by the echo of mining coal seam, depending on its in the change reconnoitred on section to determine whether goaf exists, and draw a circle to approve its border.It is known that: goaf defines natural impedance difference diverse with stratum.Meanwhile, goaf is easily formed natual subside, and i.e. roof and superstratum natual subside bashing, cause superstratum loose.Accordingly, because the existence in goaf, when carrying out seismic reflectuon seismic noise exploration along survey line, the earthquake reflected wave in coal seam there will be following change: 1. can not form that energy is strong, the preferable reflection wave groups of seriality；2. reflection wave groups energy substantially weakens or disappears；3. the frequencies go lower of echo；4. the reflection wave groups energy in lower goaf coal seam dies down, and seriality is deteriorated.

The common ground of said method is to measure under artificial field acts on, and the geophysical prospecting method finding Solid Mineral is applied on old Exhausted area prospecting.The reflection of ground instrument measured value is geologic body physical property integrated value, and shown by this physical quantity is that Solid Mineral of underground or old dead zone are entirely with the subjective experience of exponent.The Detecting Old dead zone success rate of institute's method described above only has about 50%, and its root is at the multi-solution of physical prospecting curve.These methods are merely able to know whether underground is low-resistance region or high resistance area, as to whether inbreak, deformation, water-filling or not water-filling, the water yield has much, covered depth how much to be to know.Can invent a kind of method made a distinction old dead zone and geophysical prospecting equipment with underground SOLID MINERAL RESOURCES, scientific and technological circle never solve the most both at home and abroad, there is no relevant achievement in research and Product Report.

Summary of the invention

In order to overcome above-mentioned technical problem, this utility model is to provide a kind of detection device that can reliably monitor old dead zone, mine.

The technical solution of the utility model is: a kind of mine old Exhausted area prospecting device, including cable probe connection, front interface module, signal condition modular converter, DSP processing module, it is characterized in that the cable probe connection that connected in order by multistage receives distributed electric field signal that natural electric magnetic wave formed on earth's surface after the reflected refraction of old dead zone and is transferred to front interface module, signal is by front interface module, signal condition modular converter is transported to DSP processing module, DSP processing module collection preservation data are further analyzed and extract old Gap Features information for host computer reading and are directly displayed to user, also output logic control signal is to signal condition modular converter, the control end of front interface module.

nullIn this utility model，Cable probe connection includes head end adapter (2-1)、Cable body (2-2)、Tail end adapter (2-3)、Probe adapter (2-4)、Probe (2-5) and terminator cap (2-6)，Head end adapter (2-1) is one for even detection device or 12 core aviation plugs of the preceding paragraph cable probe connection and to pass through cable body (2-2) and be connected with the tail end adapter (2-3) being used for being connected next section of cable probe connection or terminator cap (2-6)，Probe (2-5) is connected with cable body (2-2) by probe adapter (2-4)，Every section of cable probe connection has separate type coding、Use can be connected in order by multistage，And be uniformly distributed on it at a distance of 8 probe adapters for D，First probe is t rice with the distance of head end adapter，Tail probe is D-t rice with the distance of tail end adapter；Cable body (2-2) is to include 7 internal layer cores and the double-shielded cable of 13 outer layer cores；Tail end adapter (2-3) is a cylinder, be built-in with by 8 SI PO shift register IC1,8 be incorporated to go here and there out shift register IC2,8 control circuits selecting 1 analog switch IC3 and IC4,8 toggle switch SW1,8 diode D1～D8 and 8 resistance R1～R8 to form；Probe adapter (2-4) includes the metal top cover through cable body and the insulant lower cover of built-in probe testing circuit plate, probe in detecting circuit board is made up of magnetic bead Z1, resilient contact SW2, electric capacity C1 and diode D9, and probe (2-5) is that a upper end is machined with the nipple for being connected with probe adapter lower cover, lower end is machined with the good conductive metal material thin bar of the cone being easily inserted earth；Terminator cap (2-6) is an impedance matching network being attached on tail end adapter (2-3), including electric capacity C2, C3, C4, C5 and resistance R9, R10, R11.

In this utility model; front interface module includes cable probe connection interface, four high guaily unit IC5 and IC7, instrument amplifier IC6, diode D10-D17, midget relay JD1, digital control potentiometer PR1 and PR2, resistance R12-R30, electric capacity C6-C16; achieve protection amplitude limit and the differential amplification of probe signals, high-pass filtering, bipolarity conversion amplification, notch filter, the low-pass filtering of cable probe connection interface input/output signal, and the connection status of probe and channel performance can be detected.

In this utility model, signal condition modular converter includes the controlled band filter of 12 band connection frequencies, the rear gain amplifier of 12 adjustable gain joints, the analog-digital converter of 16 passages inputs, the controlled filter circuit of fourth-order band-pass frequency that single band filter is made up of switch-capacitor filtering chip IC 8, resistance R31-R36, electric capacity C17 and C18, the in-phase amplification circuit that single rear gain amplifier is made up of amplifier IC9, digital control potentiometer PR3, resistance R37 and R38, electric capacity C19；1st passage of 16 channel modulus converters connects bipolar signal reference point, 2nd passage connects preposition amplification and exports, after 3-14 passage connects 12, gain amplifier exports, and the 15th passage connects probe 1 connection status detection output signal, and the 16th passage connects probe 2 connection status detection output signal.

In this utility model, DSP processing module includes that dsp processor, clock and reset, CPLD, RAM, ROM, flash memory disk, USB interface, LCD touch display module, dsp processor touches display module exchange data by bus with CPLD, RAM, ROM, flash memory disk, USB interface, signal condition modular converter, LCD under the driving of clock with reset circuit controls, and touches display module, signal condition modular converter and the control end of front interface module also by CPLD output logic control signal to RAM, ROM, flash memory disk, LCD；LCD touches display module and includes display-memory, display logic controls, touch screen detection conversion, drive power circuit, LED backlight drive circuit, chromatic liquid crystal screen with LED-backlit and resistive touch screen, video data and control signal are transmitted to display logic control by dsp processor, display logic control circuit is data cached and to be output a control signal to drive power circuit to manage power supply to display-memory output display data to chromatic liquid crystal screen, backlight is controlled with regulation to LED backlight drive circuit, the status signal of resistive touch screen transmits to dsp processor through touch screen tesing and switching circuit.

The beneficial effects of the utility model are: the cable probe connection that detection device is connected in order by multistage receives the distributed electric field signal that natural electric magnetic wave is formed after the reflected refraction of old dead zone on earth's surface, therefrom extract the characteristic information of old dead zone and analyze its covered depth, size, state, result of detection is unique, positioning precision is high, can be widely used for exploration and the preventing and treating of old dead zone, mine.

Accompanying drawing explanation

With embodiment, this utility model patent is described further below in conjunction with the accompanying drawings.

Fig. 1 is structural representation of the present utility model；

Fig. 2 is cable probe connection structural representation of the present utility model；

In figure: 2-1. head end adapter, 2-2. cable body, 2-3. tail end adapter, 2-4. probe adapter, 2-5. probe, 2-6. terminator cap

Fig. 3 is cable tail end connector circuit schematic diagram of the present utility model；

Fig. 4 is probe in detecting principle schematic of the present utility model；

Fig. 5 is cable termination adapter circuit theory diagrams of the present utility model；

Fig. 6 is front interface modular circuit schematic diagram of the present utility model；

Fig. 7 is signal condition modular converter structured flowchart of the present utility model；

Fig. 8 is single channel signal modulate circuit schematic diagram of the present utility model；

Fig. 9 is DSP processing module structured flowchart of the present utility model；

Figure 10 is that LCD of the present utility model touches display module structured flowchart；

Figure 11 is the old Gap Features hum pattern of this utility model detection.

Detailed description of the invention

Seeing accompanying drawing 1, a kind of mine old Exhausted area prospecting device, including cable probe connection, front interface module, signal condition modular converter, DSP processing module.Cable probe connection, for receiving the distributed electric field signal that natural electric magnetic wave is formed after the reflected refraction of old dead zone on earth's surface, can connect use by multistage, the problem wider to solve mine old Exhausted area prospecting scope under the control of detection device in order；The signal that cable probe connection receives is transported to DSP processing module through preposition interface module, signal condition modular converter, preserved data by DSP processing module collection to read for host computer and be further analyzed, extract old Gap Features information and parameter shows on the LCD display of this device simultaneously, it is easy to user's ready-made analysis result of detection, the signal condition modular converter of this device, front interface module and cable probe connection all the management of DSP processing module and control under orderly being operated, with complete specify region the old Exhausted area prospecting in mine.

In conjunction with accompanying drawing, Fig. 2 is cable probe connection structural representation of the present utility model, Fig. 3 is cable tail end connector circuit schematic diagram of the present utility model, and Fig. 4 is probe in detecting principle schematic of the present utility model, and Fig. 5 is cable termination adapter circuit theory diagrams of the present utility model.Cable probe connection includes head end adapter (2-1), cable body (2-2), tail end adapter (2-3), probe adapter (2-4), probe (2-5) and terminator cap (2-6), head end adapter (2-1) is one for even detection device or 12 core aviation plugs of the preceding paragraph cable probe connection and to be connected with the tail end adapter (2-3) being used for being connected next section of cable probe connection or terminator cap (2-6) by cable body (2-2), and probe (2-5) passes through probe adapter (2-4) and is connected with cable body (2-2)；Cable body (2-2) is to include 7 internal layer cores and the double-shielded cable of 13 outer layer cores；Tail end adapter (2-3) is a cylinder, be built-in with by 8 SI PO shift register IC1,8 be incorporated to go here and there out shift register IC2,8 control circuits selecting 1 analog switch IC3 and IC4,8 toggle switch SW1,8 diode D1～D8 and 8 resistance R1～R8 to form；Probe adapter (2-4) includes the metal top cover through cable body and the insulant lower cover of built-in probe testing circuit plate, probe in detecting circuit board is made up of magnetic bead Z1, resilient contact SW2, electric capacity C1 and diode D9, and probe (2-5) is that a upper end is machined with the nipple for being connected with probe adapter lower cover, lower end is machined with the good conductive metal material thin bar of the cone being easily inserted earth；Terminator cap (2-6) is an impedance matching network being attached on tail end adapter (2-3), including electric capacity C2, C3, C4, C5 and resistance R9, R10, R11.This cable probe assembly every section has type coding, use can be connected in order by multistage, it is uniformly distributed at a distance of 8 probe adapters for linking probe (2-5) (2-4) for D on every section of cable, first probe is t rice with the distance of head end adapter (2-1), and tail probe is D-t rice with the distance of tail end adapter (2-3)；Type coding is 8 binary codes, and high 3 scopes that arrange representing t-1(t are 1～4 meter), low 5 scopes that arrange representing D-1(D are 1～32 meter), the toggle switch SW1 internal by tail end adapter (2-3) is arranged；Such as the cable probe assembly that type coding is 19H, representing that being uniformly distributed on this section of cable is apart 8 probes of 10 meters, first probe is 2 meters with the distance of head end electrical connector, and tail probe is 8 meters with the distance of tail end electrical connector.Head end adapter (2-1) is the aviation plug of 12 cores, the definition of its heart yearn is consistent with 12 core aviation plugs of 12 core aviation sockets of tail end adapter (2-3) and terminator cap (2-6), it is: heart yearn 1 and 2 meets power supply VCC, heart yearn 11 and 12 meets power supply ground GND, heart yearn 10 meets cable shield ground EGND, heart yearn 7 meets probe in detecting and signal ground TZJC, heart yearn 8 and 9 meets probe signals Differential Input IN+ and IN-, heart yearn 3 meets serial synchronization clock DCLK, heart yearn 5 meets serial date transfer Din, heart yearn 4 meets serial data output Dout, heart yearn 6 meets Shift register initialization SH/LD.

Cable body (2-2) is 20 core double-shielded cable, by 7 internal layer cores and void filler wrapped interior sealing coat after internal shield weaves, wrapped outer sealing coat after being uniformly distributed 13 outer layer cores outside it, then is formed by extruding oversheath after the braiding of total screen layer；7 internal layer cores are formed by copper wire or tinned copper wire are stranded, all use F46 insulation, and are distinguish between by the color insulated, such as: blue, red, black, brown, grey, yellow, green, the sectional area of Line 1 core therein is 0.2mm², the sectional area of the 2nd～No. 7 core be 0.3mm²Carrying out stranded by the both threads core of the 2nd and 3,4 and 5,6 and No. 7, twisting pitch is not more than 15mm, by three groups of stranded cores and Line 1 core (centrage) is stranded forms, pitch is not more than 20 times of external diameter, gap uses cotton thread or the rope made of hemp to fill carrying effect, the core that will always twist uses the copper wire of Φ 0.12mm or tinned copper wire braiding form, and density is not less than 90%, use PP band or polyester belt, one layer of wrapped, one layer of vertical bag, rate of putting up is not less than 15%, it is impossible to bottom pour ladle situation occur；13 outer layer cores are formed by copper wire or tinned copper wire are stranded, all use F46 insulation, and be distinguish between by the color insulated, such as: red, black, brown, grey, yellow, green, blue, white, pink, pale green, orange, the therein 8th and the insulation redness of No. 10 line core and sectional area are 0.3mm², the insulation black of the 9th and No. 11 core and sectional area be 0.3mm², the sectional area of the 12nd～No. 19 core be 0.2mm²And on the core that stranding is good wrapped one layer of polyester belt, rate of putting up is not less than 15%, the copper wire or the tinned copper wire braiding that use Φ 0.12mm on the core good by total stranding form, and density is not less than 90%, uses 105 DEG C of flame-retardant chemigum extruded polymer to form, finished color: black, external diameter: 11.8 ± 0.3mm, all insulated wire cores sparking test voltages are that 4KV does not punctures, and wireline environment temperature-40～+75 is spent.null8th and No. 10 line core of cable meet power supply VCC，9th and No. 11 core meets power supply ground GND，No. 20 core is used as cable shield ground EGND with the external shielding layer of cable after being connected at aviation plug socket，Line 1 core internal shield with cable at aviation plug socket is connected、As signal ground in normal detection、Detection signal TZJC output it is used as when cable probe self-inspection，2nd and No. 3 core is used as probe signals Differential Input IN+ and IN-，No. 4 core is used as serial synchronization clock DCLK，No. 6 core is used as serial date transfer Din，No. 5 core is used as serial data and exports Dout，No. 7 core is used as Shift register initialization SH/LD，12nd～No. 19 core is respectively used to the A end within 8 probe-type electric connectors being connected on cable.

Tail end adapter (2-3) is a cylinder connector, and one end is cable accessing port, and the other end is for connecting next section of cable probe assembly or the aviation socket of terminator cap, being built-in with control circuit plate；Control circuit plate is had by 8 SI PO shift register IC1(optional chip models: 74HC164,74LS164 etc.), 8 be incorporated to go here and there out shift register IC2(optional chip model and have: 74HC164,74LS164 etc., it is possible to realized IC1, IC2 function by 1 Prammable PLD), 8 select 1 analog switch IC3 and IC4(optional chip model to have: CD4051, MAX4781, AD7510, LF13508 etc.), 8 toggle switch SW1(can circuit board solder joint short circuit replace), 8 diode D1～D8 and 8 resistance R1～R8 form.20 cores double-shielded cable cable body (2-2) are entered by cable accessing port end, the the 12nd～No. 19 core connecting the internal A end of 8 probe electrical connectors is connected to 8 probe signals inputs of control circuit plate, 8 probe signals inputs also connect and select 1 analog switch IC3 with two panels 8, on 8 input pins of IC4, and 8 probe signals inputs connect the anode of diode D1～D8 respectively, the negative electrode of diode D1～D8 meets power supply VCC, for amplitude limit probe input signal to protect internal circuit together with the diode of the plus earth in 8 probe electrical connectors on this section of cable；null8th、The power supply VCC of the heart yearn 1 and 2 that No. 10 line core connects head end electrical connector is attached directly to the heart yearn 1 and 2 of the aviation socket of tail end electrical connector，9th、The power supply ground GND of the heart yearn 11 and 12 of No. 11 core connection head end electrical connectors is attached directly to the heart yearn 11 and 12 of the aviation socket of tail end electrical connector，The cable shield ground EGND of the heart yearn 10 of No. 20 core connection head end electrical connector is attached directly to the heart yearn 10 of the aviation socket of tail end electrical connector，The serial synchronization clock DCLK of the heart yearn 3 of No. 4 core connection head end electrical connector is attached directly to the heart yearn 3 of the aviation socket of tail end electrical connector，The serial data output Dout of the heart yearn 4 of No. 5 core connection head end electrical connector links the serial data input of control circuit plate IC1、In control circuit plate, the serial data output terminal of IC2 links the heart yearn 4 of the aviation socket of tail end electrical connector，The serial date transfer Din of the heart yearn 5 of No. 6 core connection head end electrical connector is attached directly to the heart yearn 5 of the aviation socket of tail end electrical connector，The Shift register initialization SH/LD of the heart yearn 6 of No. 7 core connection head end electrical connector is attached directly to the heart yearn 6 of the aviation socket of tail end electrical connector，Probe signals Differential Input IN+ and IN-of the heart yearn 8 and 9 of the 2nd and No. 3 core connection head end electrical connector is attached directly to the heart yearn 8 and 9 of the aviation socket of tail end electrical connector，Line 1 core connects the heart yearn 7 that the probe in detecting of the heart yearn 7 of head end electrical connector is attached directly to the aviation socket of tail end electrical connector with signal ground TZJC.Working power VCC of control circuit plate is connected to the heart yearn 1 and 2 of the aviation socket of tail end electrical connector, ground GND is connected to the heart yearn 11 and 12 of the aviation socket of tail end electrical connector, 8 SI PO shift register IC1 of control circuit plate and 8 are incorporated to go here and there out the serial synchronization clock DCLK of shift register IC2 and link the heart yearn 3 of the aviation socket being connected to tail end electrical connector, Shift register initialization SH/LD is connected to the heart yearn 6 of the aviation socket of tail end electrical connector, two panels 8 selects 1 analog switch IC3, IC4 selects to export the heart yearn 8 and 9 of the aviation socket that IN+ and IN-is connected to tail end electrical connector.8 be incorporated to go here and there out shift register IC2,8 toggle switch SW1 together with 8 resistance R1～R8 for arranging 8 type codings of this section of cable, when 8 toggle switch SW1 all disconnect, go here and there out shift register IC2 8 parallel-by-bit input pins by pull-up resistor R1～R8 pull-up be high level, any 1 toggle switch closes, then the IC2 input of its correspondence is low level.Control circuit plate work process is as follows: (1) is if the head end electrical connector of this section of cable is connected with detection device；(2) by detection device, Shift register initialization SH/LD is set to 0,8 output pins of 8 SI PO shift register IC1 are initialized to low level, go here and there out simultaneously and are loaded into the shift register within IC2 on 8 parallel input pins of shift register IC2；(3) by detection device, Shift register initialization SH/LD is put 1, make shift register IC1, IC2 enter displaced condition；(4) detection device sends 16 Bits Serial data Dout and serial synchronization clock DCLK, 16 Bits Serial data are moved into IC1, IC2 by turn, and 8 type codings within 8 initialization code, IC2 within IC1 are moved out to the heart yearn 4 of the aviation socket of tail end electrical connector by turn simultaneously；(5) if connect on the aviation socket of tail end electrical connector is terminator cap 6, then heart yearn 4 and heart yearn 5 short circuit, the serial data of (4th) step removal returns to the Din of head end electrical connector by heart yearn 5, and detection device just can synchronize to move into 8 initialization code of this section of cable and 8 type codings by turn；(6) if connect on the aviation socket of tail end electrical connector is next section of cable probe assembly, the serial data of (4th) step removal moves into next section of cable probe assembly by the heart yearn 4 of the aviation socket of tail end electrical connector, there is the cable probe assembly of terminator cap just can return data to detect device by the heart yearn 5 of the aviation socket of tail end electrical connector until connecting, (7) as long as detection device sends many groups 16 Bits Serial data Dout and serial synchronization clock DCLK continuously, just connected cable probe assembly quantity can be learnt by returning data, the information such as the connection status of type and probe；(8) when normally detecting, detection device sends the gating control code of respective amount according to the connection state information that (7th) step obtains, the probe that i.e. may select arbitrary connection is connected, it is achieved thereby that the point in detection process is away from the flexible with pole span with detection device differential input signal line IN+ or IN-.The gating control code of every section of cable probe assembly is 8, and high 4 control the 8 probes connections selecting 1 analog switch IC4 needed for gating signal line IN+, and low 4 control the 8 probes connections selecting 1 analog switch IC3 needed for gating signal line IN-；The definition of high and low 4 control codes is consistent, as a example by low 4 control codes: bit3=1 does not gate this section of probe as holding wire IN-, follow-up bit2～bit0 is unlimited, bit3=0 gate this section of probe as holding wire IN-, bit2～bit0=000,001,010,011,100,101,110,111 respectively gating probe T1, T2, T3, T4, T5, T6, T7, T8.

Probe adapter (2-4) includes upper cover, lower cover two parts, and upper cover is machined by aluminum, copper or stainless steel and other metal materials and forms, and lower cover then uses the cast of the insulant such as ultra high molecular polyethylene, politef or is machined into.Cable body from upper cover through rear fixing and make its external shielding layer and upper cover be reliably connected, internal shield and an outer layer core link to G end and the A end of probe in detecting circuit board, probe (2-5) is screwed in screw by the probe of lower cover and screws in and two resilient contacts on short circuit probe in detecting circuit board；Probe in detecting circuit board is made up of magnetic bead Z1, resilient contact SW2, electric capacity C1 and diode D9.Probe (2-5) is a metal material thin bar with good electric conductivity, and the nipple of upper part is for being connected with probe-type electric connector, and it is the easiest that the cone of end portion can make detection bar insert earth, and centre is slender cylinder.nullWhen probe is screwed in screwed hole screw-in by the probe of lower cover，Probe is played fixation by female thread，When probe is screwed into certain depth can be by two resilient contact SW2 short circuits on probe in detecting circuit board，Its specific works process is as follows: (1) is when probe connection status detects，Sent by detection device and need to detect gating control code corresponding to probe to tail end electrical connector and by the Line 1 core TZJC(of cable and cable internal shield short circuit) export the probe in detecting signal G end to probe in detecting circuit board，Probe in detecting signal is through diode D9、Resilient contact SW2、Magnetic bead Z1 is to the A end of probe in detecting circuit board，A end selects 1 analog switch input pin by 8 of a control circuit plate being connected within tail end electrical connector in the 12nd～No. 19 core of cable，Analog switch gating output pin is connected to the 2nd of cable、No. 3 core (two input channels，Two probes can be detected) every time，It is connected with detection device through head end electrical connector，Detection device judges and provides the connection status of probe and the break-make situation of cable according to the detection signal returned；null(2) under normal detection event，The Line 1 core TZJC of cable is by connecing signal ground (being i.e. the G termination signal ground of probe in detecting circuit board) inside detection device，Gating control code is sent to tail end electrical connector to select two probes needing test to be connected to the 2nd of cable by detection device、No. 3 cores are as IN+、IN-is input to detect device internal testing circuit，Now，The anode of the diode D9 of probe in detecting circuit board connects signal ground，For amplitude limit probe input signal to protect internal circuit together with the diode meeting power supply VCC with the negative electrode within tail end electrical connector，The signal that probe receives is through resilient contact SW2、Magnetic bead Z1 is to the A end of probe in detecting circuit board，A end selects 1 analog switch input pin by 8 of a control circuit plate being connected within tail end electrical connector in the 12nd～No. 19 core of cable，Analog switch gating output is to the 2nd of cable、No. 3 cores，It is connected to detect device internal testing circuit through head end electrical connector.

Probe (2-5) is used for receiving natural electric field information, and field signal in it had both received the earth's crust in detection process the most also have received the electromagnetic interference signal in space；For avoiding the spatial electromagnetic interference impact on detection, concatenate high frequency characteristics preferable ceramic disc capacitor C1(preferred high frequency zero temp shift stain ceramic disc capacitor at resilient contact SW2 between signal ground G end with connecing).Owing to the signal frequency range of natural electric field is in very low frequency (3～30KHz) scope, extracts natural electric field information for effective, between resilient contact SW2 and A end, be serially connected with High frequency filter magnetic bead Z1.Magnetic bead Z1 is equivalent to resistance and inductance series connection, but resistance value and inductance value all change with frequency, and it has more preferable High frequency filter characteristic than common inductance, presents when high frequency resistive, so higher impedance can be kept in comparatively wide frequency range, thus improve filter effect；Magnetic bead is made up of Ferrite, and inductance is made up of magnetic core and coil, and magnetic bead is converted into heat energy AC signal, and inductance stores exchange, discharges slowly；Ferrite bean cannot be only used for filtering in circuit high-frequency noise, also can be widely used to other circuit, and its volume can be made very small；Particularly in digital circuit, owing to pulse signal contains the higher hamonic wave that frequency is the highest, also it is the main contributor of circuit high frequency radiation, so the effect of magnetic bead can be played in this occasion.

Terminator cap (2-6) is an impedance matching network being attached on tail end connector 3, including electric capacity C2, C3, C4, C5 and resistance R9, R10, R11, owing to circuit structure is simple, being made and be arranged on inside 12 core aviation plugs, the heart yearn definition of this aviation plug is consistent with head end adapter (2-1).In circuit, electrochemical capacitor C5 is used as the decoupling capacitance on power line together with ceramic disc capacitor C2, and electric capacity C3 and C4 is the preferable ceramic disc capacitor of high frequency characteristics, filters the High-frequency Interference on two differential signal lines in normal detection；Resistance R9 is for the impedance matching of serial time clock line with serial data line, resistance R10 is for the pull-up of Shift register initialization SH/LD holding wire, resistance R11 and the R12 in front interface module is used for mating differential signal lines impedance, to reduce the differential mode interference between two differential signal lines.

Seeing accompanying drawing 6, front interface module includes cable probe connection interface, four high guaily unit IC5 and IC7, instrument amplifier IC6, diode D10-D17, midget relay JD1, digital control potentiometer PR1 and PR2, resistance R12-R30, electric capacity C6-C16.Diode D10-D17 is for the input/output signal line of limited amplitude protection DSP processing module with cable probe connection; wherein D10, D11 protect TDCLK holding wire; D12, D13 protect TDDIN holding wire, and D14, D15 protect TDDOUT holding wire, and D16, D17 protect TSH/LD holding wire.The circuit being made up of IC5C, IC5D, R13, R14, C6, C7, PR1 is a fully-differential amplifier in the case of proper testing, and its output gain is regulated (R13=R14) by digital control potentiometer PR1, gain A=1+ (R13+R14)/PR1；When probe connection status detects, being open circuit by the tap setting of digital control potentiometer PR1, circuit is equivalent to two buffers, directly by the detection voltage buffer on probe to analog-digital converter；C6=C7 is the preferable ceramic disc capacitor of high-frequency filter capacitor, preferably high frequency characteristics.IC5B, R15 ~ R18, C8, C9 forms a high-pass filtering with direct current offset correction circuit (wherein, R15=R16, R17=R18, C8=C9), for eliminating direct current offset in input signal, filtering the low-frequency component beyond test scope, high-pass filtering cut-off frequencyf=1/2 π R17C8.IC6, IC5A, R19, R20, PR2 form bipolarity converter amplifier circuit, IC5A Yu R19, R20 determine the reference point voltage Vref of bipolar signal, IC6 Yu PR2 composition differential signal is to the converter amplifier circuit of bipolar signal, and digital control potentiometer PR2 is the feedback resistance within instrument amplifier IC6 for regulating amplification A=1+2R/PR2(R).IC7A, IC7B, R21 ~ R25 (wherein, R21=R22=2R23), C10 ~ C12(wherein, C10=C11=C12/2) form the high q-factor wave trap of a profound and negative feedbck, trap frequencyf=1/2 π R21C10(need to rationally select R21, C10, makesf=50Hz), the ratio of regulation R24 Yu R25 is to change wave trap Q-value.IC7C, IC7D, R26 ~ R29 (wherein, R26=R27=R28=R29), C13 ~ C16(wherein, C13=C14=C15=C16) form a fourth order low-pass wave filter, for filtering the radio-frequency component outside test scope, low-pass filtering cut-off frequencyf=1/2 π R26C13.Midget relay JD1 is when DSP processing module output control signal JCKZ is low level, and the instrument internal simulation ground of holding wire screen layer and instrument internal is connected；When control signal JCKZ is high level, the detection signal TZJCXH that holding wire screen layer and DSP processing module export connects；It is achieved thereby that the connection status of probe and the automatic of channel performance are detected.The four high guaily unit of front interface module is the single supply op of low-power consumption, low noise, and optional model has: AD8574, TLC274, LT1016 etc.；Instrument amplifier is the instrument amplifier that a gain control resistance is external, and optional model has: MAX4194, AD623 etc.；Digital control potentiometer is the X9241 of XICOR company, the like product of the company such as the most optional MAX, AD, DS, CAT；AGN21003 or AGN20003 selected by midget relay.

Fig. 7 is signal condition modular converter structured flowchart of the present utility model, and Fig. 8 is single channel signal modulate circuit schematic diagram of the present utility model；Signal condition modular converter includes the controlled band filter of 12 band connection frequencies, the rear gain amplifier of 12 adjustable gain joints, the analog-digital converter of 16 passages inputs, one of them (remaining is similar) band filter is by the controlled filter circuit of fourth-order band-pass frequency being made up of switch-capacitor filtering chip IC 8, resistance R31-R36, electric capacity C17 and C18, in circuit, C17, C18 are power supply coupling capacitor, power taking resistance R31=R34, R32=R35, R33=R36, bandpass filtering mid frequency is exported through CPLD by dsp processorf _BPCLKX(12 tunnels are different) determinesf _BPX=f _BPCLKX/ 100, Q-value=R33/R32, circuit amplification A=[R33/R31]²；When circuit parameter selects, the amplification of 12 band filters is arranged unanimously (amplification can be chosen between 1-10), make 12 band filters have different bandpass filtering mid frequencyes and Q-value by choosing different R32, with ensure the frequency range that 12 bands are logical can cover needed for test frequency range.The in-phase amplification circuit that one of them (remaining is similar) gain amplifier afterwards is made up of amplifier IC9, digital control potentiometer PR3, resistance R37 and R38, electric capacity C19, digital control potentiometer PR3 is used for regulating amplification A=R38/PR3(amplification and can be adjusted between 1-100), R37 is that input adaptation resistance takes R37=R38, C19 is high-frequency filter capacitor, amplifier IC9 can be realized by single amplifier, double operational or four high guaily unit, single supply op AD8599, OP285, OP297 etc. of preferably less than power consumption, low noise in this patent；Owing to this circuit is after 12 band filters, and the output that advance signal is after 12 band filter frequency-selectings is not of uniform size, therefore need to regulate digital control potentiometer PR3, makes signal the most undistorted but also can meet the requirement that analog-to-digital converter resolution is higher.Analog-to-digital conversion module is the modulus switching device of 16 passage inputs, and the 1st passage connects bipolar signal reference point, and when normal detection and after 12, gain amplifier output subtracts each other to obtain bipolar signal；2nd passage connects preposition amplification and exports, and is used for regulating digital control potentiometer PR1 and PR2, to ensure that signal is the most undistorted in preposition amplification but also can effectively be amplified；After 3-14 passage connects 12, gain amplifier exports, and during normal detection, the bipolar signal reference point with the 1st passage subtracts each other to obtain bipolar signal；15th passage connects probe 1 connection status detection output signal and the 16th passage connects probe 2 connection status detection output signal, for the detection of probe connection status and regulation digital control potentiometer PR1.The ADS7953(12-bit of 16 passages that the ADC optional employing TI company of this patent analog/digital conversion circuit produces), ADS7957(10-bit), ADS7961(8-bit) family chip, analog power voltage is 2.7V～5.25V, digital power voltage is 1.7V～5.25V, sample rate is up to the SPI interface of 1MHz, 20MHz；It has the features such as precision is high, volume is little, passage is many, use is flexible.Analog/digital conversion circuit converts analog signals into digital signal, and by digital data transmission to DSP processing module, DSP can be according to A/D converter output valve simultaneously, by CPLD, rear preamplifier gain amplifying circuit, rear gain amplifying circuit are automatically controlled and regulate, to ensure resolution and the certainty of measurement of measurement data.

Fig. 9 is DSP processing module structured flowchart of the present utility model, and Figure 10 is that LCD of the present utility model touches display module structured flowchart；DSP processing module includes that dsp processor, clock and reset, CPLD, RAM, ROM, flash memory disk, USB interface, LCD touch display module, dsp processor touches display module exchange data by bus with CPLD, RAM, ROM, flash memory disk, USB interface, signal condition modular converter, LCD under the driving of clock with reset circuit controls, and touches display module, signal condition modular converter and the control end of front interface module also by CPLD output logic control signal to RAM, ROM, flash memory disk, LCD.DSP(Digital Signal Processor digital signal processor) it is a kind of microprocessor for completing Digital Signal Processing in real time, DSP can be selected for C3X or the C67X floating point processor of TI company's T MS320 series, the ADSP21XXX floating point processor of AD company, the DSP32XX floating point processor of AT & T Corp., the MC960XX floating point processor of MOTOROLA company, the uPD772XX floating point processor of NEC Corporation, and this patent uses the C672X Floating-point DSP of TI company's T MS320 series.Clock and reset circuit are respectively DSP and provide work clock and power-on reset signal；ROM is used for execution program and the parameter of save set；RAM is for the intermediate data of save set program operation process；CPLD(Complex Programmable Logic Device) have employed the ispMACH4000Z series complex logic programming device that quiescent dissipation is extremely low, be the logic input/output interface of other circuit of device and DSP, the address decoding of complete cost instruments, data are transmitted, are controlled the functions such as output, information encryption.The DSP of signal processing module can send control signal by CPLD to preposition interface module according to user instruction, to realize the detection of probe connection status and the selection of normal detection；Meanwhile, DSP receives the digital signal that analog/digital conversion circuit is transmitted, and produces gain control signal and controls front interface gain, rear gain amplifying circuit by CPLD, it is achieved that amplify the self adaptation of different size signal after being analyzed processing；After completing above self-inspection and control being set, the distributed electric field signal that natural electric magnetic wave acquired in probe is formed on earth's surface after the reflected refraction of old dead zone by DSP by A/D converter is acquired, and combines gain control code and the digital signal of collection is converted to the actual value acquired in probe and is saved in flash memory disk (reading analyzing and processing by USB interface or DSP by internal bus for host computer) and send LCD touch display screen to show.LCD touches display module and includes display-memory, display logic controls, touch screen detection conversion, drive power circuit, LED backlight drive circuit, chromatic liquid crystal screen with LED-backlit and resistive touch screen, video data and control signal are transmitted to display logic control by dsp processor, display logic control circuit is data cached and to be output a control signal to drive power circuit to manage power supply to display-memory output display data to chromatic liquid crystal screen, backlight is controlled with regulation to LED backlight drive circuit, the status signal of resistive touch screen transmits to dsp processor through touch screen tesing and switching circuit.Considering the factors such as visibility, operability and low-power consumption, LCD touches screen size and should select between 3 inches to 6 inches.The self-inspection of instrument and normal detection all can be realized by touch operation under LCD touches the display reminding of display screen.Detection terminates, the touch selection operation of display screen can be touched by LCD, by DSP detection data in internal bus reads internal flash memory disk, it is the old Gap Features hum pattern of this utility model detection that data carry out available Figure 11 after numeral anti-aliasing filtering, FFT and the method such as frequency spectrum refinement, spectral line search process.

It is the old Gap Features hum pattern of a measuring point in survey line shown in Figure 11, according to dominant frequency frequencyf _zIts covered depth can be calculatedh=1591.58 (1/f _z )^0.5, by dominant frequency amplitude E (t) can the old dead zone of qualitative analysis be in filling, subside, the state such as water-filling, can substantially determine the magnitude range of old dead zone in conjunction with the result of detection of the different depth of multiple measuring points.

In sum, the cable probe connection that mine of the present utility model old Exhausted area prospecting device is connected in order by multistage receives the distributed electric field signal that natural electric magnetic wave is formed after the reflected refraction of old dead zone on earth's surface, therefrom extract the characteristic information of old dead zone and analyze its covered depth, size, state, effectively solving the problem that in tradition physical prospecting engineering, arrangement of measuring-line quantities is big, detection efficient is low；Detection device can by flexible in programming configure the point of each measuring point away from and pole span, gather each measuring point data in an orderly manner, decrease the space and time difference of detection data, improve the availability of gather information.Detection device capacity of resisting disturbance is strong, receive signal stabilization, result of detection is unique, positioning precision is high, can be widely used for exploration and the preventing and treating of old dead zone, mine.

Claims (5)

1. a mine old Exhausted area prospecting device, including cable probe connection, front interface module, signal condition modular converter, DSP processing module, it is characterized in that the cable probe connection that connected in order by multistage receives distributed electric field signal that natural electric magnetic wave formed on earth's surface after the reflected refraction of old dead zone and is transferred to front interface module, signal is by front interface module, signal condition modular converter is transported to DSP processing module, DSP processing module collection preservation data are further analyzed and extract old Gap Features information for host computer reading and are directly displayed to user, also output logic control signal is to signal condition modular converter, the control end of front interface module.

nullA kind of mine the most according to claim 1 old Exhausted area prospecting device，It is characterized in that: described cable probe connection includes head end adapter (2-1)、Cable body (2-2)、Tail end adapter (2-3)、Probe adapter (2-4)、Probe (2-5) and terminator cap (2-6)，Head end adapter (2-1) is one for even detection device or 12 core aviation plugs of the preceding paragraph cable probe connection and to pass through cable body (2-2) and be connected with the tail end adapter (2-3) being used for being connected next section of cable probe connection or terminator cap (2-6)，Probe (2-5) is connected with cable body (2-2) by probe adapter (2-4)，Every section of cable probe connection has separate type coding、Use can be connected in order by multistage，And be uniformly distributed on it at a distance of 8 probe adapters for D，First probe is t rice with the distance of head end adapter，Tail probe is D-t rice with the distance of tail end adapter；Cable body (2-2) is to include 7 internal layer cores and the double-shielded cable of 13 outer layer cores；Tail end adapter (2-3) is a cylinder, be built-in with by 8 SI PO shift register IC1,8 be incorporated to go here and there out shift register IC2,8 control circuits selecting 1 analog switch IC3 and IC4,8 toggle switch SW1,8 diode D1～D8 and 8 resistance R1～R8 to form；Probe adapter (2-4) includes the metal top cover through cable body and the insulant lower cover of built-in probe testing circuit plate, probe in detecting circuit board is made up of magnetic bead Z1, resilient contact SW2, electric capacity C1 and diode D9, and probe (2-5) is that a upper end is machined with the nipple for being connected with probe adapter lower cover, lower end is machined with the good conductive metal material thin bar of the cone being easily inserted earth；Terminator cap (2-6) is an impedance matching network being attached on tail end adapter (2-3), including electric capacity C2, C3, C4, C5 and resistance R9, R10, R11.

A kind of mine the most according to claim 1 old Exhausted area prospecting device, it is characterized in that: described front interface module includes cable probe connection interface, four high guaily unit IC5 and IC7, instrument amplifier IC6, diode D10-D17, midget relay JD1, digital control potentiometer PR1 and PR2, resistance R12-R30, electric capacity C6-C16, achieve protection amplitude limit and the differential amplification of probe signals of cable probe connection interface input/output signal, high-pass filtering, bipolarity conversion is amplified, notch filter, low-pass filtering, and the connection status of probe and channel performance can be detected.

A kind of mine the most according to claim 1 old Exhausted area prospecting device, it is characterized in that: described signal condition modular converter includes the band filter that 12 band connection frequencies are controlled, the rear gain amplifier of 12 adjustable gain joints, the analog-digital converter of 16 passage inputs, single band filter is by switch-capacitor filtering chip IC 8, resistance R31-R36, the controlled filter circuit of fourth-order band-pass frequency of electric capacity C17 and C18 composition, single rear gain amplifier is by amplifier IC9, digital control potentiometer PR3, resistance R37 and R38, the in-phase amplification circuit of electric capacity C19 composition；1st passage of 16 channel modulus converters connects bipolar signal reference point, 2nd passage connects preposition amplification and exports, after 3-14 passage connects 12, gain amplifier exports, and the 15th passage connects probe 1 connection status detection output signal, and the 16th passage connects probe 2 connection status detection output signal.

A kind of mine the most according to claim 1 old Exhausted area prospecting device, it is characterized in that: described DSP processing module includes dsp processor, clock and reset, CPLD, RAM, ROM, flash memory disk, USB interface, LCD touches display module, dsp processor passes through bus and CPLD under the driving of clock with reset circuit controls, RAM, ROM, flash memory disk, USB interface, signal condition modular converter, LCD touches display module exchange data, also by CPLD output logic control signal to RAM, ROM, flash memory disk, LCD touches display module, the control end of signal condition modular converter and front interface module；LCD touches display module and includes display-memory, display logic controls, touch screen detection conversion, drive power circuit, LED backlight drive circuit, chromatic liquid crystal screen with LED-backlit and resistive touch screen, video data and control signal are transmitted to display logic control by dsp processor, display logic control circuit is data cached and to be output a control signal to drive power circuit to manage power supply to display-memory output display data to chromatic liquid crystal screen, backlight is controlled with regulation to LED backlight drive circuit, the status signal of resistive touch screen transmits to dsp processor through touch screen tesing and switching circuit.