CN205749927U - A kind of electrical measuring instrument, based on Identification Using Pseudo-Random Correlation technology - Google Patents

Abstract

A kind of electrical measuring instrument, based on Identification Using Pseudo-Random Correlation technology, including: GPS module, A/D module, electrode module, main control module, data memory module, keyboard control module, display control module, USB and serial communication modular and Temperature and Humidity module；Described GPS module is connected with main control module, A/D module is connected with main control module, electrode module is connected with A/D module, and main control module is connected with serial communication modular and Temperature and Humidity module with data memory module, keyboard control module, display control module, USB respectively；This utility model can realize gathering data the function of real-time calculating section relevant parameter in noise more intense ambient, has the advantage that noise robustness is strong.

Description

A kind of electrical measuring instrument, based on Identification Using Pseudo-Random Correlation technology

Technical field

This utility model relates to prospecting instrument field, particularly relates to a kind of electrical method based on Identification Using Pseudo-Random Correlation technology and surveys Visit instrument.

Background technology

In exploration environment in the wild, the significant problem that electrical prospecting is faced, it is simply that various interference noises；By The signal of telecommunication is mainly used in prospecting instrument, and in underground medium, it is understood that there may be some natural underground signals of telecommunication and Some Human disturbance signals that a little periphery infrastructure produce, the result of electrical prospecting all can be caused shadow by these interference signals Ring；In some cases, the intensity of noise signal has been even more than useful signal；If simple dependence increases supply voltage and electricity The mode of stream, then can cause bigger energy consumption, be greatly increased cost；Accordingly, it would be desirable to take at more advanced signal and information Reason technology and method, develop a kind of new exploitation method possessing effectively compacting noise and technology.

Meanwhile, along with improving constantly of exploration demand, first gather data, carry out the mode processed the most again with PC Growing needs cannot be met；Therefore, develop a both had strong anti-interference ability also possess hard real time calculate energy The instrument of power is the most necessary.

Utility model content

Technology of the present utility model solves problem: overcome the deficiencies in the prior art, it is provided that a kind of relevant based on pseudorandom The electrical measuring instrument, of identification technique and method thereof, to the main physical parameters-apparent resistivity in geophysical exploration, regard polarization Rates etc. calculate in real time, analyze and process, it is possible to increase the efficiency that electrical prospecting later data processes, and giving searches for mineral resources brings Great convenience.

Technical solution of the present utility model is: a kind of electrical measuring instrument, based on Identification Using Pseudo-Random Correlation technology, Including: GPS module, A/D module, electrode module, main control module, data memory module, keyboard control module, display control module, USB and serial communication modular and Temperature and Humidity module；Described GPS module is connected with main control module, A/D module and main control module Being connected, electrode module is connected with A/D module, and main control module controls mould with data memory module, keyboard control module, display respectively Block, USB are connected with serial communication modular and Temperature and Humidity module；

Described GPS module includes gps antenna, gps signal output serial ports and GPS pulse outfan；Wherein gps antenna is respectively Connect with gps signal output serial ports and GPS pulse outfan；GPS information is sent to GPS serial ports list by gps signal output serial ports Unit；Pulse signal is sent to GPS pulse and synchronizes and counting unit unit by GPS pulse outfan；

Described A/D module includes signal condition and amplifying circuit and ADC；Wherein signal condition and amplifying circuit and electricity Pole is connected with electrode, being sent to ADC after the signal processing obtained by electrode；ADC and AD acquisition controlling unit phase Even it is connected with signal gathering unit, under the control of AD acquisition controlling unit, carries out analog digital conversion, send the data to signal and adopt Collection unit；

Described electrode module includes electrode and electrode；Electrode is all connected with amplifying circuit with signal condition with electrode；

Described main control module includes that GPS pulse synchronizes and counting unit, GPS serial port unit, signal gathering unit, AD collection Control list, the storage of abnormal alarm unit, Voltage-Controlled Temperature Compensated Crystal Oscillator unit, data, the control of pseudo-random signal signal generating unit, operating system Unit, keypad control unit, real-time mathematical computing unit, Temperature and Humidity unit, USB and serial communication unit, show and control Unit processed；Main control module is responsible for the overall operation of instrument, and operating system control unit is the control axis of main control module；GPS arteries and veins Punching synchronizes mainly to complete Tong Bu of the GPS of instrument with counting unit unit, GPS serial port unit and Voltage-Controlled Temperature Compensated Crystal Oscillator unit Business；Signal gathering unit and AD acquisition controlling unit mainly complete the AD collecting work of instrument；Abnormal alarm unit and warm and humid Degree detector unit is mainly used in monitoring ambient parameter, protects the properly functioning of instrument；Signal gathering unit, pseudo-random signal generate Unit and real-time mathematical computing unit mainly complete the calculation process of the instrument data to collecting；Data storage cell, key Dish control unit, USB and serial communication unit and display and control unit mainly complete between instrument and host computer or peripheral hardware Data communication；

Described data memory module has been responsible for the storage of the data that instrument collects and generates；

Keyboard control module is responsible for the user operation in man-machine interaction；

Display control module is responsible in instrument work showing corresponding content and receiving the instruction of user's touch input；

USB is responsible for and host computer or peripheral communication with serial communication modular, completes the transmission of data；

Temperature and Humidity module is responsible for detecting ambient parameter, protects the properly functioning of instrument.

This utility model advantage compared with prior art is:

(1) this utility model employs the ARM Cortex-A main control module with stronger mathematical computational abilities, calculates speed Degree is fast, can obtain result of calculation in real time, and show on LCD；Overcome existing instrument computing capability not strong, poor real Shortcoming；

(2) this utility model employs the correlation analysis algorithm that a kind of capacity of resisting disturbance is extremely strong, and this algorithm is transplanted to After on instrument, it is possible to obtain well anti-jamming effectiveness；

(3) this utility model is through suitable optimization and improvement, cannot be only used for electrical prospecting, it is possible to be more broadly useful for The collection of multiple small-signal and analyzing and processing.

Accompanying drawing explanation

Fig. 1 is the composition frame chart of a kind of electrical measuring instrument, based on Identification Using Pseudo-Random Correlation technology of this utility model；

Fig. 2 is a method flow diagram being embodied as example of the present utility model.

Detailed description of the invention

As it is shown in figure 1, a kind of electrical measuring instrument, based on Identification Using Pseudo-Random Correlation technology of this utility model includes: GPS Module 1, A/D module 2, electrode module 3, main control module 4, data memory module 5, keyboard control module 6, display control module 7, USB and serial communication modular 8 and Temperature and Humidity module 9；Described GPS module 1 is connected with main control module 4, A/D module 2 and master control Module 4 is connected, and electrode module 3 is connected with A/D module 2, main control module 4 respectively with data memory module 5, keyboard control module 6, Display control module 7, USB are connected with serial communication modular 8 and Temperature and Humidity module 9；

Described GPS module 1 includes gps antenna 11, gps signal output serial ports 12 and GPS pulse outfan 13；Wherein GPS Antenna 11 connects with gps signal output serial ports 12 and GPS pulse outfan 13 respectively, after gps antenna obtains satellite data, passes through The GPS serial port unit 42 that GPS satellite data is sent in main control module by gps signal output serial ports 12, by main control module to defending Sing data is further analyzed and processes, the task such as time control completing instrument；It addition, gps antenna 11 obtains from satellite Data in also include pulse information, the GPS arteries and veins that this pulse information will be sent in main control module by GPS pulse outfan 13 Punching synchronizes and counting unit 41, and main control module can realize a pulse synchronized, and replaces the pulse of GPS to use when GPS losing lock；

Described A/D module 2 includes signal condition and amplifying circuit 21 and ADC 22；Wherein signal condition and amplifying circuit 21 are connected with electrode 31 and electrode 32, and for obtaining underground signal from electrode 31 and electrode 32, described underground signal is adjusted at signal Filtering through passive low pass in reason and amplifying circuit 21, programmable automation controller, active low-pass filter, at single-ended transfer difference conversion After reason, it is changed into ADC acceptable input signal, sends into ADC 22；ADC 22 and AD acquisition controlling list Unit 44 is connected and is connected with signal gathering unit 43, after ADC 22 carries out analog digital conversion to signal, at AD acquisition controlling unit The digital signal that will convert under the control of 44 sends into signal gathering unit 43, in order to main control module 4 is for further processing；

Described electrode module 3 includes electrode 31 and electrode 32；Electrode 31 and electrode 32 all with signal condition and amplifying circuit 21 are connected, for obtaining the signal of telecommunication of underground；

Described main control module 4 includes that GPS pulse synchronizes and counting unit 41, GPS serial port unit 42, signal gathering unit 43, AD acquisition controlling unit 44, abnormal alarm unit 45, Voltage-Controlled Temperature Compensated Crystal Oscillator unit 46, data storage cell 47, pseudorandom letter The inspection of number signal generating unit 48, operating system control unit 49, keypad control unit 410, real-time mathematical computing unit 411, humiture Survey unit 412, USB and serial communication unit 413, display and control unit 414；Main control module 4 is responsible for the overall operation of instrument, Operating system control unit 49 is the control axis of main control module 4；GPS pulse synchronizes to be responsible for receiving GPS arteries and veins with counting unit 41 Rush the pulse signal that outfan 13 is sent, and by the regulation to Voltage-Controlled Temperature Compensated Crystal Oscillator unit 46, synchronize the pulse of a standard Signal, in the case of gps satellite losing lock, provides pulse signal accurately to main control module 4；GPS serial port unit 42 He Gps signal output serial ports 12 is connected, and receives the data of gps signal output serial ports 12 or to gps signal output string by UART Mouth 12 sends data, and the information received includes the information such as longitude, latitude, time, date, and these information will be recorded, and uses Use when later data is analyzed；Signal gathering unit 43 and AD acquisition controlling unit 44 mainly completes the AD of instrument and gathers work Making, AD acquisition controlling unit 44 is for controlling the sampling process of ADC, for example with speed, sampling channel number etc.；Signal Collecting unit 43 is responsible for receiving the data that ADC 22 is sent, and processes for follow-up calculating and uses；Abnormal alarm unit 45 Main task is to receive the humiture parameter that Temperature and Humidity unit 412 transmits, if temperature or humidity have obvious exception, uses Family can see warning prompt on the display screen of instrument, in order to user carries out next step process, protects the properly functioning of instrument； Pseudo-random signal signal generating unit 48 is used for generating pseudorandom m-sequence or invert-repeated m-sequence, and the sequence of generation is sent in real time Mathematical calculation unit 411；Real-time mathematical computing unit 411 receives pseudo-random signal signal generating unit 48 and signal gathering unit simultaneously 43 data sent, calculate each parameter, and the geophysics such as described parameter includes but not limited to apparent resistivity, apparent chargeability are joined Number, described geophysics parameter is for reflecting the distribution situation of underground medium；Preferably, real-time mathematical computing unit 411 is counted The parameter obtained, can be sent to display and control unit 414, and showing can be a series of by drawing etc. with control unit 414 Result of calculation is shown on screen by operation；Display and control unit 414 are the most also receiving the instruction of user's touch input, behaviour Make system control unit 49 receive these instruction after, next step process can be performed；Data storage cell 47 is responsible for instrument Device be there is a need to the storage work of the data preserved；Signal gathering unit 43 and the data of pseudo-random signal signal generating unit 48 and The part data that real-time mathematical computing unit 411 is calculated, are required to store, in order to use during post analysis；Key Dish control unit 410 falls within a part for man-machine interaction, accepts the instruction of user's input, and performs corresponding operation；USB with Serial communication unit 413 is instrument and extraneous communication interface, when user needs to carry out between instrument and host computer or peripheral hardware During the operation that data exchange, USB and serial communication unit 413 will undertake this partial task；On main control module 4, transplant one Individual operating system control unit 49, all working on main control module 4, it is scheduling by operating system control unit 49, makes Instrument operates under a good timing environment；

Described data memory module 5 is the internal storage device on instrument, has been responsible for the number that instrument collects and generates According to the storage waiting related data；

Keyboard control module 6 is the input equipment on instrument, is responsible for the user operation in man-machine interaction；

Display control module 7 is the output on instrument and input equipment, be responsible for instrument work in show corresponding content with And receive the instruction of user's touch input；In the design of instrument, the TFT using a piece 7 cun is touched by display control module 7 Screen, supports 5 touch-controls；

USB and serial communication modular 8 are the communication interfaces on instrument, are responsible for instrument and host computer or peripheral communication, complete The transmission of data；USB2.0 communication protocol can be supported, send data to USB flash disk, or be directly connected to host computer, carry out data biography Defeated operation；

Temperature and Humidity module 9 is the sensor device on instrument, is responsible for detection ambient parameter, the normal fortune of protection instrument OK；

Below by embodiment electrical prospecting method of based on Identification Using Pseudo-Random Correlation technology a kind of to this utility model again Further describe；

As shown in Figure 2:

Step 201: first, connects instrument with power supply (accumulator etc.), presses switch, starts instrument, on instrument Electricity；

Step 202: after instrument energising, a series of preparation, now operating system control unit can be first carried out Bringing into operation, instrument will perform system initialization operation on backstage, such as, check that the hardware case of self is the most normal, obtain The parameter of gps satellite, gathers humiture information, it is judged that ambient parameter is the most normal, checks battery electric quantity etc., normal for instrument Work is prepared；

Step 203: instrument performs the operation that GPS synchronizes on backstage, connects satellite, and obtains the data of satellite, it is thus achieved that warp Latitude, the time, information, these data and the information such as date and time information and a calibration pulse will provide necessary for the work of instrument Ensure；

Step J01: after operating system control unit brings into operation, instrument will gather and obtains Temperature Humidity Sensor Data, and judge that these numerical value are whether within the scope of safety；If it is then instrument will perform step 205, otherwise, instrument Device will perform step 207；

Step 204: after completing step 202 and step 203, instrument enters step 204, the main interface of display instrument； Main interface is the window of man-machine interaction, and the operation of user all completes at main interface；On main interface, user can input each seed ginseng Number, such as sample rate, port number, needs the parameter being calculated and be shown, stores position, sampling time etc.；And control opening of collection Move and stop, the various operations such as the data after collection derive, the calculating of parameter；

Step J02: after execution of step 203, instrument will once judge, examine whether GPS synchronized result becomes Merit, if synchronizing successfully, then enters step 205, otherwise, it is possible that be that instrument cannot receive gps signal, returns step 203 weight The new GPS of execution synchronizes；If instrument does not receives gps signal always, it will show a warning message on screen, to remind The problem of user's satellite-signal；

Step 205: after the detection of humiture numerical value is normal, instrument can be by temperature, and the information such as GPS synchronous regime shows On screen, the data that user can show according to instrument, it may be judged whether need to carry out next step operation；

Step 206: if instrument is in step J01, detects humiture data exception, then instrument will enter step 206, screen shows abnormal alarm information, user can process exception according to this information；

Step 207: after everything in readiness, user can start to operate on display control module 7, input instruction And parameter request, it is also possible to completed the input of instruction and parameter by keypad control unit, and start the acquisition tasks of instrument；

Step J03: after user sets the time that instrument starts collection, instrument can perform once to judge, to compare GPS The self defined time that the time of satellite inputs with user；If the time that user sets not yet arrives, then instrument is put into step Rapid 208, start again after waiting time arrival to gather, if the time reaches, then enter step 209；

Step 208: execution etc. are to be operated, till the time that user sets by the time arrives；

Step 209: after the time specified arrives, instrument starts acquisition tasks, obtains corresponding data, line number of going forward side by side Calculating and analyze, result of calculation will show on screen, and user can obtain the parameters such as apparent resistivity, apparent rate of frequency spread intuitively；

Step 210: obtain the parameter that user specifies；

Step 211: obtain transmission function s_system:

The acquisition mode of described transmission function particularly as follows:

Relation according to input with output signal:

(1)s_out-s_noise=s_in*s_system

Wherein, s_inFor the pseudorandom m signal of input system, it can be considered have randomness within a cycle；s_sys ^t _emIt is Need the ssystem transfer function calculated, s_noiseFor random noise signal, s_outThe signal collected for instrument；

(2) then, equation both sides are to input signal s_inDo computing cross-correlation, obtain

R_inout(t)-R_innoise(t)=R_inin(t)*s_system

Wherein, R_inoutT () is the cross-correlation function of input signal and output signal, R_inin(t) be input signal from phase Close function, R_innoiseT () is the cross-correlation function of input signal and noise；

(3), after, equation both sides are carried out fast Fourier transform FFT, obtains

R_inout(w)-R_innoise(w)=R_inin(w)S(w)

Equation deforms, and obtains

$\left(4\right)---S\left(w\right)=\frac{R_{inout}\left(w\right)-R_{innoise}\left(w\right)}{R_{inin}\left(w\right)}$

In above formula, due to noise signal s_noiseWith input signal s_inThere is irrelevance, so R_innoiseW () mathematically It is approximately 0；Therefore, it can obtain following equation:

$\left(5\right)---S\left(w\right)=\frac{R_{inout}\left(w\right)}{R_{inin}\left(w\right)}$

Wherein, the auto-correlation spectrum R of pseudo-random signal_inin(w) likely there will be 0 frequency, causing denominator is 0, So, in order to avoid R_ininWhen () is 0 w, identification result is brought the biggest fluctuation, through Improvement, in pseudo-random signal s_in Autocorrelative frequency spectrum R_ininA little normal real number value R is added on (w)_αSo that the value near 0 amplitude frequency can somewhat become big Some, be unlikely to again identification result is caused large effect；Then following formula can be obtained:

$\left(6\right)---S\left(w\right)=\frac{R_{inout}\left(w\right)}{R_{inin}\left(w\right)+R_{\mathrm{\α}}}$

Above formula is carried out Fast Fourier Transform Inverse IFFT, it is possible to obtain system transter；

With input signal s_inWith output signal s_outAs primary signal, then final expression formula is:

$\left(7\right)---s_{system}\left(t\right)=IFFT\[\frac{FFT\[\underset{t\→\mathrm{\∞}}{\lim }{\∫}_0^T{s}_{in}\left(t\right)s_{out}(t+\mathrm{\τ})dt\]}{FFT\[\underset{t\→\mathrm{\∞}}{\lim }{\∫}_0^T{s}_{in}\left(t\right)s_{in}(t+\mathrm{\τ})dt\]+R_{\mathrm{\α}}}\]$

Here it is the ssystem transfer function finally given；Through experiment, modifying factor value R_αWhen being 0.01, effect is preferable；

During test, a selected system function is

s_system(t)=12.3e^-10tSin (5.7t),

Wherein, e is a constant；Employ above-mentioned algorithm to process, the signal of transmission be amplitude be 1V, the repetition period Number is 1, and the inverse of chip width is 0.0002s, and sample frequency is the pseudorandom m signal of 0.001Hz；Adding making an uproar at random of 5V After sound, this algorithm about 19dB better than the noise suppression ability of traditional method；

Step J04: after collection completes, will derive data by the user decide whether to need, if user selects no, that It is directly entered step 213, if user's selection is, then enter step 212, to derive data；

Step 212: the operation that data derive；Data in this step, can be derived to outside by user with operating instrument USB flash disk or and instrument connect host computer, carry out data process and depth analysis for user's later stage；

Step 213: after completing the operation that data derive, an acquisition tasks of instrument completes；When gathering next time, can To repeat above step；

The content not being described in detail in this utility model description belongs to existing known to professional and technical personnel in the field Technology；

The above is only preferred implementation of the present utility model, it is noted that for the ordinary skill people of this area For Yuan, on the premise of without departing from this utility model principle, it is also possible to make some improvements and modifications, these improvements and modifications Also should be regarded as protection domain of the present utility model.

Claims (9)

1. an electrical measuring instrument, based on Identification Using Pseudo-Random Correlation technology, including: GPS module, A/D module, electrode module, Main control module, data memory module, keyboard control module, display control module, USB and serial communication modular and Temperature and Humidity Module；Described GPS module is connected with main control module, and A/D module is connected with main control module, and electrode module is connected with A/D module, master control Module is examined with serial communication modular and humiture with data memory module, keyboard control module, display control module, USB respectively Survey module is connected；

Described GPS module includes gps antenna, gps signal output serial ports and GPS pulse outfan；Wherein gps antenna respectively and Gps signal output serial ports and GPS pulse outfan connect, and after gps antenna obtains satellite data, export serial ports by gps signal The GPS serial port unit being sent in main control module by GPS satellite data, is further analyzed satellite data by main control module With process, it is achieved the time of instrument controls；Gps antenna also includes pulse information, this pulse information from the data that satellite obtains The GPS pulse being sent in main control module by GPS pulse outfan is synchronized and counting unit, realizes one for main control module The pulse of individual synchronization, replaces the pulse of GPS to use when GPS losing lock；

Described A/D module includes signal condition and amplifying circuit and ADC；Wherein signal condition and amplifying circuit and the first electricity Pole is connected with the second electrode, and for obtaining underground signal from the first electrode and the second electrode, described underground signal is at signal condition With in amplifying circuit through passive low pass filter, programmable automation controller, active low-pass filter, single-ended transfer difference conversion process it After, it is changed into ADC acceptable input signal, sends into ADC；ADC be connected with AD acquisition controlling unit and Signal gathering unit is connected, after ADC carries out analog digital conversion to signal, and will conversion under the control of AD acquisition controlling unit The digital signal become sends into signal gathering unit, in order to main control module is for further processing；Described electrode module includes first Electrode and the second electrode；First electrode and the second electrode are all connected with amplifying circuit with signal condition, for obtaining the electricity of underground Signal；

Display control module is the output on instrument and input equipment, is responsible in instrument work showing corresponding content and reception The instruction of user's touch input.

Electrical measuring instrument, based on Identification Using Pseudo-Random Correlation technology the most according to claim 1, it is characterised in that:

Described main control module includes that GPS pulse synchronizes and counting unit, GPS serial port unit, signal gathering unit, AD gather control Unit processed, abnormal alarm unit, Voltage-Controlled Temperature Compensated Crystal Oscillator unit, data storage cell, pseudo-random signal signal generating unit, operating system Control unit, keypad control unit, real-time mathematical computing unit, Temperature and Humidity unit, USB and serial communication unit, display With control unit；Main control module is responsible for the overall operation of instrument, and operating system control unit is the control axis of main control module； GPS pulse synchronizes to be responsible for receiving the pulse signal that GPS pulse outfan is sent with counting unit, and by Voltage-Controlled Temperature Compensated Crystal Oscillator The regulation of unit, synchronizes the pulse signal of a standard, in the case of gps satellite losing lock, provides standard to main control module True pulse signal；GPS serial port unit is connected with gps signal output serial ports, is received the number of gps signal output serial ports by UART According to or to gps signal output serial ports send data；Signal gathering unit and AD acquisition controlling unit gather for the AD of instrument Work, AD acquisition controlling unit is for controlling the sampling process of ADC.

Electrical measuring instrument, based on Identification Using Pseudo-Random Correlation technology the most according to claim 2, it is characterised in that: signal Collecting unit is responsible for receiving the data that ADC is sent, and processes for follow-up calculating and uses；Abnormal alarm unit is used for receiving The humiture parameter that Temperature and Humidity unit transmits, if temperature or humidity have obvious exception, user can be in the display of instrument Warning prompt is seen on screen.

Electrical measuring instrument, based on Identification Using Pseudo-Random Correlation technology the most according to claim 3, it is characterised in that: display Additionally the most also receiving the instruction of user's touch input with control unit, operating system control unit after receiving these instructions, Relevant treatment is performed according to instruction.

Electrical measuring instrument, based on Identification Using Pseudo-Random Correlation technology the most according to claim 4, it is characterised in that:

Data storage cell is responsible for instrument and be there is a need to the storage work of the data preserved；Signal gathering unit and pseudorandom letter The part data that the data of number signal generating unit and real-time mathematical computing unit are calculated, are required to store, in order to Use during post analysis.

Electrical measuring instrument, based on Identification Using Pseudo-Random Correlation technology the most according to claim 5, it is characterised in that:

Described data memory module is the internal storage device on instrument, has been responsible for depositing of the data that instrument collects and generate Storage；Keyboard control module is the input equipment on instrument, is responsible for the user operation in man-machine interaction.

Electrical measuring instrument, based on Identification Using Pseudo-Random Correlation technology the most according to claim 6, it is characterised in that:

USB and serial communication modular are the communication interfaces on instrument, are responsible for instrument and host computer or peripheral communication, complete data Transmission；USB2.0 communication protocol can be supported, send data to USB flash disk, or be directly connected to host computer, carry out data transmission Operation；Temperature and Humidity module, is responsible for detection ambient parameter, protects the properly functioning of instrument.

Electrical measuring instrument, based on Identification Using Pseudo-Random Correlation technology the most according to claim 7, it is characterised in that:

Pseudo-random signal signal generating unit is used for generating pseudorandom m-sequence or invert-repeated m-sequence, and the sequence of generation is sent to reality Time mathematical calculation unit；Real-time mathematical computing unit receives pseudo-random signal signal generating unit simultaneously and signal gathering unit sends Data, calculate each parameter, and described parameter includes apparent resistivity, apparent chargeability.

9., according to the arbitrary described electrical measuring instrument, based on Identification Using Pseudo-Random Correlation technology of claim 1-8, its feature exists In:

Keypad control unit is for accepting the instruction of user's input, and performs corresponding operation；USB and serial communication unit are instrument Device and extraneous communication interface, for realizing the data exchange between instrument and host computer or peripheral hardware.