CN205229476U - Mining ann's type focus dual -frenquency induced polarization method swashs electric signal reception system - Google Patents

Abstract

The utility model discloses a mining ann's type focus dual -frenquency induced polarization method swashs electric signal reception system, its characterized in that comprises power supply circuit, interface circuit, conditioning module, host system, shell and interface etc. Power supply circuit is interface circuit, conditioning module and host system power supply, and interface circuit is connected with host system with external connecting terminal and the inside conditioning module of receiver respectively, and conditioning module mainly accomplishes the functions such as production that swash the taking care of of electric voltage signal, collection and interface circuit 0 signal, and host system mainly accomplishes interface circuit 2, swashs functions such as electrical parameter demonstration and interface circuit 3, utilization the utility model discloses, can realize to high low frequency amplitude, high low frequency absolute phase, apparent resistivity, look sharp electrical parameters such as amplitude -frequency rate measurement, demonstration and storage and to the synchro control and the data display of transmitter. The inside circuit design of instrument accords with colliery essence technical standards for production safety and requirement, can be used to colliery underworkings forward probe.

Description

A kind of Mine-used I. S focuses on double-frequency induced polarization method and swashs electric signal receiving system

Technical field

The utility model relates to a kind of forward probe instrument of coal mine operation of forward probe field, belongs to applied geophysics electrical method advanced detection technology, particularly relates to a kind of Mine-used I. S focusing double-frequency induced polarization method and swashs electric signal receiving system.

Background technology

The mechanization degree of China's coal-mine mining method strengthens gradually, requires more and more higher to the work efficiency of fully mechanized workface.The principle of " prediction has pick to visit, first visits and dig afterwards, first controls and adopt afterwards " must be followed in tunneling process, ensure the safety in production of personnel and machine in workplace.At present, coal mine down-hole tunnel forward probe method comprises mine direct current method, Mine Transient Electromagnetic Method, underground geological radar probe method, Rayleigh waves method and mine seismic wave advanced detection technology etc.There are the following problems for these geophysical prospecting method: there is the outstanding problems such as detection accuracy rate is low, poor real, directivity are poor, efficiency is low, cost is high, poor anti jamming capability, spy pick separation, can not meet the requirement of development end to forward probe completely.Therefore, study that a kind of method of work is simple, detection accuracy is high, it is significant to realize with the forward probe method of development machine work compound as early as possible.

Focusing on double-frequency induced polarization method (patent No. CN103176214A) is a kind of Advance Detection of Coal Roadway method based on bidifly electrical method and static focusing effect that China Mining Univ. (Beijing) proposes, according to the character that same sex electric field repels mutually, the detection electric field utilizing the constrained electric field of constraint electrode emission and central electrode to launch interacts, utilize constraint and the deflecting action of electric field, the direction of propagation of effective control electric field, the transmit direction of detection electric field and transmitting boundary is made to control in certain limit, thus realize angle and depth scan detection, carry out the accurate location of anomalous body, reach and determine direction, the object of set a distance detection.

How to continue kind academician's utility model double-frequency induced polarization method and the pertinent instruments (patent No. CN1034276A) of Central South University, wherein SQ-3C Dual-frequency Ip Method instrument receiver mainly adopts mimic channel design, shortcoming is that apparatus structure is complicated, be subject to temperature drift, time drift, Environmental Noise Influence, be mainly used in surface electric survey Exploration Domain at present.The utility models such as the Japanese plum ability of Shandong University tunnel or tunnel advance geologic prediction combined type induced polarization instrument and equipment (patent No. CN102176059A), weak point is that frequency-region signal processing module can only obtain the amplitude of low frequency and high frequency fundamental, and phase information can not be obtained, be mainly used in the water body unfavorable geologic body forecast of front, tunnel at present.According to consulting domestic and international pertinent literature, induced polarization method and instrument thereof are not yet for coal mine down-hole tunnel forward probe field.

Utility model content

The purpose of this utility model is, overcome the defect that existing instrument exists, combine pick forward probe method based on focusing double-frequency induced polarization method coal road, provide one to meet coal mine environment requirement, the double-frequency induced polarization method of Mine-used I. S focusing accurately and reliably swashs electric signal receiving system.

The utility model is achieved through the following technical solutions:

A kind of Mine-used I. S focuses on double-frequency induced polarization method and swashs electric signal receiving system, it is characterized in that, by power circuit, interface circuit, conditioning module, main control module, the composition such as shell and interface, described power circuit is interface circuit, conditioning module and main control module are powered, interface circuit respectively conditioning module inner with external terminal and receiver and main control module is connected, conditioning module mainly completes the conditioning of sharp piezoelectric voltage signal, the functions such as the generation of collection and synchronous control signal, the main completion system of main control module controls, the functions such as parameters of electrical induction display and data processing, utilize the utility model, can realize high frequency amplitude, low frequency amplitude, high frequency absolute phase, low frequency absolute phase, apparent resistivity, depending on the measurement of the parameters of electrical inductions such as Swing frequency, display and to store and to the synchro control of transmitter and data display.

The utility model Mine-used I. S focuses on double-frequency induced polarization method and swashs electric signal receiving system compared with prior art, has following beneficial effect:

1, the utility model adopts Mine-used I. S man-machine interface as main control module, can be directly used in underground coal mine explosion-proof environment;

2, the utility model adopts isolating interface technology, achieves RS-485 communication isolating and exports control signal isolation, enhance system rejection to disturbance ability.

3, the utility model takes into full account colliery intrinsic safety requirements when designing, and meets the requirement of underground coal mine particular surroundings to electrical equipment, can be used in the forward probe of coal mine roadway.

Accompanying drawing explanation

Fig. 1 is that the utility model focuses on double-frequency induced polarization method forward probe system architecture diagram;

Fig. 2 a and 2b is the utility model drive control signal oscillogram;

Fig. 2 c is the utility model double frequency modulation current waveform figure;

Fig. 2 d is that the utility model swashs electric signal waveform figure;

Fig. 3 is the utility model conditioning module structural drawing;

Fig. 4 is that the utility model Mine-used I. S focusing double-frequency induced polarization method swashs electric signal receiving system structural drawing.

Embodiment

The technological means realized to make the utility model, creation characteristic, reaching object and effect and be easy to understand and understand, below in conjunction with concrete diagram, set forth the utility model further.

With reference to figure 1, Fig. 2.The present embodiment focuses on double-frequency induced polarization method forward probe system and comprises pumping signal emission coefficient (hereinafter referred to as emission coefficient) and sharp electric signal receiving system (hereinafter referred to as receiving system).Receiving system can produce dual-frequency P WM drive control signal V _con1, V _con2, as Fig. 2 a and Fig. 2 b, control emission coefficient and produce double frequency modulation square wave current I (t), as shown in Figure 2 c, fed the coal petrography of side in face of coal roadway tunneling by emitting electrode.The expression formula of I (t) is such as formula (1).

$\begin{array}{c}I\left(t\right)=I_H\left(t\right)+I_L\left(t\right)\\ =\frac{4}{\mathrm{\π}}{I}_0\{sin\left(2{\mathrm{\πf}}_{L}t\right)-\frac{S-1}{S}sin\left(2{\mathrm{\πf}}_{H}t\right)-\frac{1}{S}sin\left(2{\mathrm{\πf}}_{H}t\right)\\ +\underset{n=2}{\overset{\mathrm{\∞}}{\Σ}}\frac{1}{2n-1}\{sin\[(2n-1)2{\mathrm{\πf}}_{L}t\]-sin\[(2n-1)2{\mathrm{\πf}}_{H}t\]\}\}\end{array}---\left(1\right)$

There is induced polarization in coal rock medium, produce and swash piezoelectric voltage signal V under exciting current effect _int (), as Fig. 2 d, is received by the potential electrode of receiving system.Frequency field swash electrical resistivity survey survey in, near objective body current density the range of linearity in, can the earth regard linear time invariant system as.Therefore, V _infundamental frequency f in I (t) is comprised in (t) _l, f _hand harmonic frequency content, comprise noise voltage composition V in addition _noise.V _int the expression formula of () is such as formula shown in (2).

Receiving system Main Function is the impact of harmonic carcellation frequency content and noise voltage, obtains and swashs piezoelectric voltage amplitude Δ V _lwith Δ V _hand phase differential with further calculating obtains apparent resistivity ρ _s, look Swing frequency F _s, look phase frequency deng parameters of electrical induction, computing formula is respectively such as formula (3), (4), (5).

${\mathrm{\ρ}}_S=K\frac{\mathrm{\Δ}V}{I}---\left(3\right)$

$F_S=\frac{{\mathrm{\ΔV}}_L-{\mathrm{\ΔV}}_H}{{\mathrm{\ΔV}}_L}\×100\%---\left(4\right)$

With reference to figure 3.The present embodiment receiving system is by power circuit, interface circuit, conditioning module, main control module, the composition such as shell and interface, described power circuit is interface circuit, conditioning module and main control module are powered, interface circuit respectively conditioning module inner with external terminal and receiver and main control module is connected, conditioning module mainly completes the conditioning of sharp piezoelectric voltage signal, the functions such as the generation of collection and synchronous control signal, the main completion system of main control module controls, the functions such as parameters of electrical induction display and data processing, utilize the utility model, can realize high frequency amplitude, low frequency amplitude, high frequency absolute phase, low frequency absolute phase, apparent resistivity, depending on the measurement of the parameters of electrical inductions such as Swing frequency, display and to store and to the synchro control of transmitter and data display.

With reference to figure 4.The present embodiment input swash piezoelectric voltage signal successively through input stage, filtering stage and single-ended transfer difference circuit realiration to the process of simulating signal, be converted to after digital quantity through analog to digital conversion circuit, digital phase sensitivity detection process is carried out by digital processing circuit, detection data is transferred to master control system by single chip circuit with 485 communication modes, in addition, digital processing circuit controls Drive and Control Circuit and produces two-way dual-frequency P WM drive control signal.

More than show and describe ultimate principle of the present utility model, principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by claims and equivalent thereof.

Claims (4)

1. a Mine-used I. S focusing double-frequency induced polarization method swashs electric signal receiving system, it is characterized in that, by power circuit, interface circuit, conditioning module, main control module, shell and interface composition, described power circuit is interface circuit, conditioning module and main control module are powered, interface circuit respectively conditioning module inner with external terminal and receiver and main control module is connected, conditioning module mainly completes the conditioning of sharp piezoelectric voltage signal, the generation function of collection and synchronous control signal, the main completion system of main control module controls, parameters of electrical induction display and data processing function, this receiving system can realize high frequency amplitude, low frequency amplitude, high frequency absolute phase, low frequency absolute phase, apparent resistivity, depending on the measurement of Swing frequency parameters of electrical induction, display and to store and to the synchro control of transmitter and data display.

2. Mine-used I. S focusing double-frequency induced polarization method according to claim 1 swashs electric signal receiving system, and it is characterized in that, described power circuit can produce the 3 mutually isolated power supplys in tunnel, is respectively interface circuit, conditioning module and main control module and powers.

3. Mine-used I. S focusing double-frequency induced polarization method according to claim 1 swashs electric signal receiving system; it is characterized in that, described interface circuit comprises usb communication protection circuit, input signal protection circuit, exports control signal isolation protective circuit, RS-485 communication isolating protection circuit.

4. Mine-used I. S focusing double-frequency induced polarization method according to claim 1 swashs electric signal receiving system, and it is characterized in that, described main control module is Mine-used I. S man-machine interface.