CN205644584U - Deep sea well drilling gas is invaded and is detected processing circuit - Google Patents

Abstract

The utility model relates to a deep sea well drilling gas is invaded and is detected processing circuit, it includes an amplitude layering and identification module, a count measured module and a processing display module, the amplitude layering includes a reference level circuit, a comparator circuit and an anticoincidence gate circuit with identification module, the corresponding output of reference level circuit is connected to the negative sense input of each comparator, the measured signal output is connected to the positive going input end of each comparator, the input of each anticoincidence gate is connected respectively to the output of each comparator, count measured module is connected to the output of each anticoincidence gate, the measured signal amplitude dropped on the interval time value of each amplitude and total numerical value in count measured module statistics obtained the observation time value, erupt simultaneously and give the processing display module, it handles time value and total numerical value that measured signal amplitude in the observation time value dropped on each amplitude interval to handle the display module, and drawing mean speed distribution histogram and range probability distribution picture. The utility model discloses can go on fast random signal, real -time analysis handles.

Description

A kind of deep sea drilling gas incursion check signal processing circuit

Technical field

This utility model relates to random signal analysis field, particularly relates to a kind of deep sea drilling gas incursion check signal processing Circuit.

Background technology

During offshore oil drilling, supersonic Doppler principle is used to carry out flow-speed measurement and detect grinding of air content Study carefully, when wherein utilizing supersonic Doppler measurement flow rate, draw flow velocity and the amplitude of Doppler signal and frequency dependence letter Number, but this signal is not single standard doppler shifted signal, due to the randomness of signal itself, and be from this The signal of sample analyzes useful signal tool acquire a certain degree of difficulty, obtain hence with supersonic Doppler measurement flow rate method Flow rate result is highly difficult accurately.When utilizing supersonic Doppler detection air content, although available air content and Duo Pu Strangle amplitude and the frequency dependence signal of signal, but owing to gas incursion check is operated in the region, deep-sea of the most a few km OK, comprehend make gas incursion check delayed if the stochastic signal detected to be reached place on road surface, therefore can not in deep-sea Process with computer software as land, and then do not reach live effect.In order to offshore oil is bored The stochastic signals such as flow-speed measurement signal during well, gas incursion check signal carry out in real time, efficiently and quickly analyze, and have A kind of Stochastic signal processing method of necessary research and process circuit.

Summary of the invention

For the problems referred to above, the purpose of this utility model is to provide a kind of deep sea drilling gas incursion check signal processing circuit, Stochastic signal can be carried out quick, analyze and process in real time.

For realizing above-mentioned technical purpose, this utility model takes techniques below scheme: a kind of deep sea drilling gas incursion check is believed The process circuit of number processing method, it includes that an amplitude layering processes aobvious with identification module, a count measurement module and one Show module；The layering of described amplitude and identification module include a reference level circuit, a comparator circuit and XOR gate electricity Road, wherein, comparator circuit includes m comparator, and NOR gate circuit includes m XOR gate；Each described comparison The negative input of device connects the corresponding output end of described reference level circuit, the positive input of each described comparator Connecting measured signal outfan, the outfan of each described comparator connects the input of each XOR gate respectively, each The outfan of XOR gate connects described count measurement module, and described count measurement module statistics is treated in obtaining observation time value Survey signal amplitude to fall in the interval time value of each amplitude and total degree value, and be sent to described process display module, institute State and process display module and measured signal amplitude in observation time value is fallen in the interval time value of each amplitude and total degree value Process, and draw Mean Speed distribution histogram and amplitude probability distribution graph.

Described count measurement module includes m time counter, m event counter and a data encoding circuit；Often The input of time counter described in connects the outfan of each described XOR gate, each described time counter defeated Going out end and connect the input of described data encoding circuit, the input of each described event counter connects each described different Or the outfan of door, the outfan of each described event counter connects the input of described data encoding circuit, described The outfan of data encoding circuit connects described process display module.

Described reference level circuit includes a reference voltage chip, one first amplifier, one second amplifier, a dividing potential drop Circuit and first～the 6th resistance；Wherein, described bleeder circuit includes the precision resistance of the resistance such as what m was connected in series； The negative input of described first amplifier passes through described first resistance eutral grounding, the positive input of described first amplifier Connected the outfan of described reference voltage chip by described second resistance, the outfan of described first amplifier passes through institute Stating the 3rd resistance and connect the reverse input end of described first amplifier, the outfan of described first amplifier is also by described 4th resistance connects the reverse input end of described second amplifier, and the positive input of described second amplifier is by described 5th resistance eutral grounding, the outfan of described second amplifier connects the negative of described second amplifier by described 6th resistance Described bleeder circuit is connected between input, outfan and the outfan of the first amplifier of described second amplifier.

Described measured signal is sent to the input of a voltage follower by a capacitance, described voltage follower Input passes through one the 7th resistance eutral grounding, and the forward that the outfan of described voltage follower connects m described comparator is defeated Entering end, the negative input of each described comparator connects the outfan of each described precision resistance, the most adjacent two institutes Stating comparator output terminal and connect the input of XOR gate described in, the outfan of each described XOR gate is all connected with described meter Number measurement module.

Described process display module includes a serial ports receiver module, a data decoder module and a graphic plotting module；Institute State serial ports receiver module and receive all data that the serial ports sending module of described count measurement module sends, and by all numbers According to being sent to described data decoder module, after described data decoder module is to all decoding datas, when obtaining observation In measured signal amplitude fall in the interval time value of each layer amplitude and total degree value, and time value and total degree value are sent out Giving described graphic plotting module, described graphic plotting module is according to time value and total degree value and corresponding place amplitude thereof Interval layer numbering draws amplitude probability distribution graph and the rectangular histogram of Mean Speed distribution of measured signal.

This utility model is owing to taking above technical scheme, and it has the advantage that 1, this utility model is based on random letter Number amplitude domain analyze method that pending stochastic signal amplitude measurement scope is divided into several amplitudes be interval, and pass through Arrange comparator circuit in parallel, NOR gate circuit and the pending stochastic signal amplitude of count measurement module acquisition to fall each Probability that amplitude is interval and speed, so stochastic signal can be carried out quick, analyze and process in real time.2, this practicality is new Type is by arranging comparator in parallel, hence in so that the comparison procedure of pending stochastic signal and each datum is parallel , and then ensure that the real-time of measurement and higher precision.3, the reference electricity of amplitude quantizing needed for this utility model Flat formed by precision resistance series connection dividing potential drop, thereby ensure that amplitude quantizing precision.4, this utility model is owing to arranging voltage Follower, therefore effectively eliminates the load effect of pending stochastic signal.5, this utility model is due at voltage follow The input of device arranges capacitance, has therefore effectively filtered out the impact of invalid flip-flop.This utility model uses mould Intend circuit and digital circuit mixing realizes Stochastic signal processing analysis, be not only more feasible on working environment, and Realizing Stochastic signal processing than software and analyze speed faster, precision is higher, can be widely applied to containing various noises Sophisticated signal analyzing and processing and Detection of Weak Signals field.

Accompanying drawing explanation

Fig. 1 is the principle schematic of this utility model layered shaping to measured signal, wherein, including two pairs of abscissas and Vertical coordinate, the first abscissa express time, unit is the second, and the first vertical coordinate represents amplitude, and unit is volt, second Vertical coordinate represents hierarchy number, and unit is individual, and the second abscissa express time, unit is the second；

Fig. 2 is measured signal waveform diagram of the present utility model, wherein, abscissa express time, and unit is the second, Vertical coordinate represents amplitude, and unit is volt；

Fig. 3 is measured signal amplitude x (t) the of the present utility model total degree value that falls in i-th layer of amplitude interval and time value Acquisition process schematic diagram, wherein, abscissa express time, unit is the second, and vertical coordinate represents amplitude, and unit is the second；

Fig. 4 is the rectangular histogram of Mean Speed of the present utility model distribution, and wherein, abscissa represents that amplitude is interval, unit For volt, vertical coordinate represents count value average time, and unit is individual；

Fig. 5 is amplitude probability distribution schematic diagram of the present utility model, and wherein, abscissa represents that amplitude is interval, and unit is Volt, vertical coordinate express time count value, unit is individual；

Fig. 6 is composition block diagram of the present utility model；

Fig. 7 is reference level circuit schematic diagram of the present utility model；

Fig. 8 is the connection diagram of comparator of the present utility model and NOR gate circuit.

Detailed description of the invention

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

The amplitude domain analysis of stochastic signal is the important content that stochastic signal carries out statistical analysis, the amplitude of stochastic signal The probability density function at the probability available random signal specified in interval that falls represents.As it is shown in figure 1, stochastic signal Amplitude x (t) falls at i-th layer of amplitude interval (x_i,x_iTime value in+Δ x) is T_i, time value T_iComputing formula as follows:

$T_i={\mathrm{\Δt}}_{i1}+{\mathrm{\Δt}}_{i2}+...+{\mathrm{\Δt}}_{{\mathrm{iN}}_i}=\underset{j=1}{\overset{N_i}{\Σ}}{\mathrm{\Δt}}_{ij}---\left(1\right)$

In formula, T_iRepresent that the amplitude of stochastic signal falls the time value in i-th layer of amplitude interval；Δt_i1Represent stochastic signal Amplitude fall the 1st period in i-th layer of amplitude interval；Δt_i2Represent that the amplitude of stochastic signal falls i-th layer of amplitude The 2nd period in interval；Represent that the amplitude of stochastic signal falls the N in i-th layer of amplitude interval_iThe individual period, Wherein N_iRepresent that the amplitude of stochastic signal falls the total degree value in i-th layer of amplitude interval；Δt_ijRepresent that signal amplitude falls The jth period in i-th layer of amplitude interval；Wherein, j=1,2...N_i；

Based on above-mentioned condition, amplitude x (t) of stochastic signal falls at i-th layer of amplitude interval (x_i,x_iProbability in+Δ x) is as follows:

$P\&lsqb;x_i<x\left(t\right)<x_i+\mathrm{\&Delta;}x\&rsqb;=\frac{T_i}{T}---\left(2\right)$

In formula, T represents observation time；x_iRepresent the lower limit that i-th layer of amplitude is interval；x_i+ Δ x represents the i-th floor amplitude district Between the upper limit；

Amplitude domain analysis principle based on stochastic signal proposes deep sea drilling gas incursion check signal processing side of the present utility model Method and process circuit.

Deep sea drilling gas incursion check signal processing method of the present utility model comprises the following steps:

1, first pending stochastic signal amplitude measurement scope [a, b] is divided into m layer amplitude interval, the value of m according to The practical situation analyzed is determined, and in the present embodiment, m value is 64；Again by reference voltage being amplified place Reason respectively obtains measurement lower limit a and measurement upper limit b of pending stochastic signal amplitude of pending stochastic signal amplitude；? The resistance precision resistances such as rear employing m is individual are connected the measurement lower limit a of pending stochastic signal amplitude to pending random letter Level between upper limit b of number amplitude measurement is divided into m part, and the separation level one_to_one corresponding of m part is that m level is in parallel Comparator provides datum, wherein, the measurement scope [a, b] of pending stochastic signal amplitude is divided into m layer amplitude Interval, every layer of pending stochastic signal amplitude interval width is:

$\mathrm{\&Delta;}x=\frac{b-a}{m}---\left(3\right)$

In formula, Δ x represents every layer of pending stochastic signal amplitude interval width；B represents that pending stochastic signal amplitude is surveyed The upper limit of amount；A represents the measurement lower limit of pending stochastic signal amplitude；M represents the layering in the range of amplitude measurement Number；

For the ease of research and calculating, in the present embodiment, upper limit b of pending stochastic signal amplitude measurement is equal to waiting to locate The absolute value of the measurement lower limit a of reason stochastic signal amplitude, i.e. b=| a |, and then obtain pending random letter according to formula (3) Number computing formula of upper limit b of amplitude measurement, the computing formula of measurement lower limit a of pending stochastic signal amplitude, the i-th floor Interval [the x of amplitude_i,x_i+ Δ x] the computing formula of amplitude and the interval [x of amplitude of i-th layer_i,x_i+ Δ x] in the span of i, Wherein, the computing formula of the measurement lower limit a of pending stochastic signal amplitude is as follows:

$a=-\frac{m}{2}\mathrm{\&Delta;}x---\left(4\right)$

The computing formula of upper limit b of pending stochastic signal amplitude measurement is as follows:

$b=\frac{m}{2}\mathrm{\&Delta;}x---\left(5\right)$

Interval [the x of the amplitude of i-th layer_i,x_i+ Δ x] the computing formula of amplitude as follows:

x_i=i Δ x (6)

In formula, x_iRepresent the lower limit (i.e. representing i-th layer of amplitude with the lower limit that i-th layer of amplitude is interval) that i-th layer of amplitude is interval； I represents the number of plies；

Interval [the x of the amplitude of i-th layer_i,x_i+ Δ x] in the span of i be

As in figure 2 it is shown, in the present embodiment, the measurement scope of pending stochastic signal amplitude is (-5V ,+5V), decile Become 64 layers, i.e. a=-5V, b=5V, m=64, then every layer of pending stochastic signal amplitude interval width is:

Δ x=10V/64=0.15625V

First amplifying reference voltage+2.5V in the same direction, amplification is 2, obtains pending stochastic signal amplitude measurement The upper limit+5V；+ the 5V obtained amplifying circuit more reversely amplifies under the measurement obtaining pending stochastic signal amplitude Limit-5V；Level between+5V to-5V is divided into 64 layers of amplitude by the resistance precision resistance series connection such as finally employing 64 Interval, the separation level one_to_one corresponding in 64 layers of amplitude interval is 64 grades of comparators in parallel offer datums, wherein, The reference level Vref of each layer amplitude interval separation_iFor the amplitude that corresponding each layer amplitude is interval, calculated by formula (6) Go out respectively-5V ,-4.84375V ..., 0V ... 4.84375V, 5V；

2, the reverse input end of m level parallel connection comparator receives m part separation level respectively as datum, and m level is also The positive input of connection comparator receives measured signal respectively, and measured signal compares with m datum simultaneously, And obtain m at the outfan of m level parallel connection comparator simultaneously and compare output signal, owing to comparison procedure is parallel, Thereby ensure that the real-time measured and higher precision；

3 as it is shown on figure 3, to each amplitude interval upper limit comparator C_i+1With lower limit comparator C_iOutput signal carries out XOR Process, obtain falling in the interval time width of each layer amplitude and time width occurrence number containing measured signal amplitude x (t) The hierarchical signal CH of information_i, the time width utilizing each layer of amplitude interval is done enabling signal, and is counted by the time Number device adds up the regulator in the time width that this layer of amplitude is interval, to obtain n_iIndividual clock, and then obtain observation time In value T, measured signal amplitude x (t) falls the time value in this amplitude interval, meanwhile, is united by an event counter Count the time width occurrence number that this layer of amplitude is interval, fall at this with measured signal amplitude x (t) in obtaining observation time value T Total degree value N in amplitude interval_i, wherein, in observation time value T, measured signal amplitude x (t) falls in the i-th floor amplitude district Interior time value T_iFormula is as follows:

T_i=n_i·t₀ (7)

In formula, n_iRepresent clock number；t₀Represent standard clock cycle；

4, the numbering of difference place, corresponding each amplitude interval layer, falls to measured signal amplitude x (t) in observation time value T Time value and total degree value in this amplitude interval are numbered, and are uploaded to computer the most successively, and computer divides In the other calculating observation time, measured signal amplitude falls the mean time value in every layer of amplitude interval, and during respectively to observe Between measured signal amplitude x (t) falls the mean time value in every layer of amplitude interval and time value is vertical coordinate in T, with this layer The numbered abscissa of place, amplitude interval layer, respectively draw Mean Speed distribution rectangular histogram (as shown in Figure 4) and Amplitude probability distribution graph (as shown in Figure 5), wherein the rectangular histogram of Mean Speed distribution reflects amplitude rate of change, its It is worth the biggest, illustrates that signal is the slowest in the change of this amplitude interval；Amplitude probability distribution graph can illustrate that signal amplitude is at each width The probability that value interval occurs, wherein, in observation time T, measured signal amplitude x (t) falls in i-th layer of amplitude interval (x_i,x_iMean time value in+Δ x)Computing formula is:

$\begin{array}{cc}\stackrel{\&OverBar;}{T_i}=\frac{T_i}{N_i}=\frac{\underset{j=1}{\overset{N_i}{\&Sigma;}}{\mathrm{\&Delta;t}}_{ij}}{N_i}& i=-\frac{m}{2},-\frac{m}{2}+\mathrm{1...}\frac{m}{2}-1,\frac{m}{2}\end{array}---\left(8\right)$

In formula,Represent in observation time that measured signal amplitude falls the mean time value in i-th layer of amplitude interval.

As shown in Figure 6, based on above-mentioned deep sea drilling gas incursion check signal processing method, propose of the present utility model deeply Sea drilling well gas incursion check signal processing circuit, it includes an amplitude layering and identification module 1, count measurement module 2 Display module 3 is processed with one；Amplitude layering includes reference level circuit 11, comparator circuit with identification module 1 12 and a NOR gate circuit 13；

Reference level circuit 11 produces m datum, determines the m of pending stochastic signal amplitude measurement scope simultaneously Layer amplitude is interval, and m datum is sent to comparator circuit 12, and comparator circuit 12 includes that m is compared Device 121, and the negative input of each comparator 121 receives a datum respectively, each comparator 121 is just Receiving measured signal to input, measured signal produces m after comparing respectively with each datum and compares output Signal, m is compared output signal and is sent to NOR gate circuit 13, and NOR gate circuit 13 includes m XOR gate 131, M XOR gate 131 one_to_one corresponding receives m and compares output signal, and compares output signal to adjacent two and carry out XOR processes, to obtain falling containing measured signal amplitude going out occurrence at the interval time width of each layer amplitude and time width The hierarchical signal of number information, and hierarchical signal is sent to count measurement module 2；

Count measurement module 2 includes m time counter 21, m event counter 22 and a data encoding circuit 23；Each time counter 21 adds up the regulator in the time width that each amplitude is interval, and then obtains m time Value, each event counter 22 is added up the time width occurrence number that each amplitude is interval, and then is obtained m total degree Value, is sent to data encoding circuit 23 by m time value and m total degree value, and data encoding circuit 23 is according to often The numbering of one place, amplitude interval layer, to this amplitude interval statistics obtain time value and total degree value be numbered, and It is sent to process display module 3 by numbered m time value and m total degree value, processes display module 3 basis Numbered m time value and m total degree value draw out the amplitude probability distribution graph peace average rate of measured signal respectively Rate distribution histogram.

In a preferred embodiment, as it is shown in fig. 7, reference level circuit includes a reference voltage chip, two puts Big device, a bleeder circuit 111 and resistance R1～R6；Wherein, reference voltage chip provides+2.5V reference voltage, point Volt circuit 111 includes that the resistance of the precision resistance R7, R1 of the resistance such as what m was connected in series is 10k, and the resistance of R2 is The resistance of 5.1k, R3 be the resistance that the resistance that resistance is 10k, R5 is 7k, R6 of 10k, R4 be 10k, R7's Resistance is 50 Ω；

The negative input of the first amplifier 112 passes through resistance R1 ground connection, and the positive input of the first amplifier 112 leads to Crossing resistance R2 and connect the outfan of benchmark voltage chips, the outfan of the first amplifier 112 connects the by resistance R3 The reverse input end of one amplifier 112, the outfan of the first amplifier 112 connects the second amplifier also by resistance R4 The reverse input end of 113, the positive input of the second amplifier 113 passes through resistance R5 ground connection, the second amplifier 113 Outfan connected the negative input of the second amplifier 113 by resistance R6, the outfan of the second amplifier 113 and Bleeder circuit 111 is connected between the outfan of the first amplifier 112.

In a preferred embodiment, as shown in Figure 8, measured signal is sent to a voltage by a capacitance 14 The input of follower 15, the input of voltage follower 15 passes through a resistance R8 ground connection, voltage follower 15 Outfan connects the positive input of m comparator 121, and the negative input of each comparator 121 connects each essence The outfan of cipher telegram resistance R7, the most adjacent two comparator 121 outfans connect the input of an XOR gate 131, each The outfan of XOR gate 131 is all connected with count measurement module 2.

In a preferred embodiment, count measurement module 2 also includes serial ports sending module 24, system clock Circuit 25 and a system reset circuit 26；

Serial ports sending module 24 is total secondary for numbered m the time value sent by data encoding circuit 23 and m Numerical value is sent to process display module 3, and system clock circuit 25 is by for serial ports sending module 24, based on m time Number device 21 and m event counter 22 provide system clock, system reset circuit 26 to be used for as serial ports sending module 24, m time counter 21 and m event counter 22 provide systematic reset signal.

In a preferred embodiment, process display module 3 and include serial ports receiver module 31, data decoding mould Block 32 and a graphic plotting module 33；Serial ports receiver module 31 receives all data that serial ports sending module 24 sends, And all data are sent to data decoder module 32, after data decoder module 32 is to all decoding datas, In observation time, measured signal amplitude falls in the interval time value of each layer amplitude and total degree value, and by time value and total Secondary numerical value is sent to graphic plotting module 33, and graphic plotting module 33 is according to time value and total degree value and corresponding institute thereof Amplitude probability distribution graph and the rectangular histogram of Mean Speed distribution of measured signal is drawn in amplitude interval layer numbering.

Above-described embodiment is merely to illustrate this utility model, the structure of the most each parts, connected mode and processing technology etc. All can be varied from, every equivalents carried out on the basis of technical solutions of the utility model and improvement, The most should not get rid of outside protection domain of the present utility model.

Claims (6)

1. a deep sea drilling gas incursion check signal processing circuit, it is characterised in that: it includes an amplitude layering and identifies Module, a count measurement module and one process display module；The layering of described amplitude includes a datum with identification module Circuit, a comparator circuit and a NOR gate circuit, wherein, comparator circuit includes m comparator, XOR gate electricity Road includes m XOR gate；The negative input of each described comparator connects the corresponding output of described reference level circuit End, the positive input of each described comparator connects measured signal outfan, and the outfan of each described comparator divides Not connecting the input of each XOR gate, the outfan of each XOR gate connects described count measurement module, described counting Measurement module statistics obtains measured signal amplitude in observation time value and falls in the interval time value of each amplitude and total degree value, And it being sent to described process display module, measured signal amplitude in observation time value is fallen often by described process display module Time value and total degree value that one amplitude is interval process, and draw Mean Speed distribution histogram and amplitude probability divides Butut.

2. deep sea drilling gas incursion check signal processing circuit as claimed in claim 1, it is characterised in that: described counting is surveyed Amount module includes m time counter, m event counter and a data encoding circuit；Each described time counting The input of device connects the outfan of each described XOR gate, and the outfan of each described time counter connects described number According to the input of coding circuit, the input of each described event counter connects the outfan of each described XOR gate, The outfan of each described event counter connects the input of described data encoding circuit, described data encoding circuit Outfan connects described process display module.

3. deep sea drilling gas incursion check signal processing circuit as claimed in claim 1, it is characterised in that: described with reference to electricity Ordinary telegram road includes a reference voltage chip, one first amplifier, one second amplifier, a bleeder circuit and first～ Six resistance；Wherein, described bleeder circuit includes the precision resistance of the resistance such as what m was connected in series；Described first amplifies The negative input of device passes through described first resistance eutral grounding, and the positive input of described first amplifier passes through described second Resistance connects the outfan of described reference voltage chip, and the outfan of described first amplifier is by described 3rd resistance even Connecing the reverse input end of described first amplifier, the outfan of described first amplifier connects also by described 4th resistance The reverse input end of described second amplifier, the positive input of described second amplifier passes through described 5th resistance eutral grounding, The outfan of described second amplifier connects the negative input of described second amplifier by described 6th resistance, described Described bleeder circuit is connected between outfan and the outfan of the first amplifier of the second amplifier.

4. deep sea drilling gas incursion check signal processing circuit as claimed in claim 2, it is characterised in that: described with reference to electricity Ordinary telegram road includes a reference voltage chip, one first amplifier, one second amplifier, a bleeder circuit and first～ Six resistance；Wherein, described bleeder circuit includes the precision resistance of the resistance such as what m was connected in series；Described first amplifies The negative input of device passes through described first resistance eutral grounding, and the positive input of described first amplifier passes through described second Resistance connects the outfan of described reference voltage chip, and the outfan of described first amplifier is by described 3rd resistance even Connecing the reverse input end of described first amplifier, the outfan of described first amplifier connects also by described 4th resistance The reverse input end of described second amplifier, the positive input of described second amplifier passes through described 5th resistance eutral grounding, The outfan of described second amplifier connects the negative input of described second amplifier by described 6th resistance, described Described bleeder circuit is connected between outfan and the outfan of the first amplifier of the second amplifier.

5. deep sea drilling gas incursion check signal processing circuit as described in claim 3 or 4, it is characterised in that treat described in: Surveying signal and be sent to the input of a voltage follower by a capacitance, the input of described voltage follower passes through One the 7th resistance eutral grounding, the outfan of described voltage follower connects the positive input of m described comparator, each The negative input of described comparator connects the outfan of each described precision resistance, and the most adjacent two described comparators are defeated Going out end and connect the input of XOR gate described in, the outfan of each described XOR gate is all connected with described count measurement module.

6. deep sea drilling gas incursion check signal processing circuit as claimed in claim 1 or 2 or 3 or 4, it is characterised in that: Described process display module includes a serial ports receiver module, a data decoder module and a graphic plotting module；Described string Mouth receiver module receives all data that the serial ports sending module of described count measurement module sends, and all data is sent out Give described data decoder module, after described data decoder module is to all decoding datas, obtain in observation time Measured signal amplitude falls in the interval time value of each layer amplitude and total degree value, and time value and total degree value is sent to Described graphic plotting module, described graphic plotting module is interval according to time value and total degree value and corresponding place amplitude thereof Layer numbering draws amplitude probability distribution graph and the rectangular histogram of Mean Speed distribution of measured signal.