CN103048681B - The seismic data collection starter that threshold value can be arranged - Google Patents
The seismic data collection starter that threshold value can be arranged Download PDFInfo
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- CN103048681B CN103048681B CN201110311846.3A CN201110311846A CN103048681B CN 103048681 B CN103048681 B CN 103048681B CN 201110311846 A CN201110311846 A CN 201110311846A CN 103048681 B CN103048681 B CN 103048681B
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Abstract
The present invention relates to the seismic data collection starter that a kind of threshold value can be arranged。It is an object of the invention to solve the problem that in above-mentioned prior art, earthquake data acquisition enabling signal Mintrop wave is lost, its drip irrigation device is, the seismic data collection starter that a kind of threshold value can be arranged, including threshold value absolute value, circuit is set, absolute value comparison circuit and absolute value signal amplifying circuit, the input of absolute value comparison circuit electrically connects with interface circuit, the input of outfan and absolute value comparison circuit that threshold value absolute value arranges circuit electrically connects, the outfan of absolute value comparison circuit electrically connects with the input of absolute value signal amplifying circuit, the outfan of absolute value signal amplifying circuit electrically connects with output interface。Present invention uses the mode that absolute value compares, no matter trigger signal Mintrop wave and be just or bear, instrument of all initiating earthquake carries out data acquisition, obtains the geological data data of high-quality。
Description
Technical field
The present invention relates to the startup device of the data acquisition of a kind of technical field of geophysical exploration, particularly to the seismic data collection starter that a kind of threshold value can be arranged。
Background technology
Along with developing rapidly of modern information technologies, recent two decades comes, seismic instrument, signal processing method and technological means all have greatly improved, but the startup trigger used during earthquake data acquisition does not have significant progress, when using external signal as enabling signal, directly use after still adopting shaping。Owing to the size differences at the interference signal outside different places is very big, false triggering is often produced when earthquake data acquisition, especially when utilizing seismic wave as triggering signal, mostly there is signal amplification due to seismic instrument, interference signal through amplifying makes the number of times of false triggering more frequent, if preliminary wave Mintrop wave peak is negative value, then produces negative Mintrop wave and lose the phenomenon of ripple。
Chinese patent notification number CN201413563Y, February 24 2010 day for announcing, disclose a kind of ground sound, earth magnetism, the anti-interference earthquake early-warning device of earthquake motion, it is by ground acoustic detection, ground magnetic detection, seismic detection and alternating current steady voltage plug, start delay circuit composition, wherein acoustic detection includes ground sonic transducer, operational amplifier, band filter, two-level operating amplifier, active rectification, threshold values adjusts and shaping circuit, ground sound identification circuit, the sound switching of alert sound ground, alert sound power amplifier and alert acoustic(al) switch circuit, earth magnetism detection includes geomagnetic sensor, operation amplifier anti-jamming circuit and sensitivity adjustment, window comparator, alert acoustic(al) switch circuit and alert sound power amplifier, seismic detection includes seismic sensor, operation amplifier anti-jamming circuit and sensitivity adjustment, window comparator, alert acoustic(al) switch circuit and alert sound power amplifier。Although this technical scheme also is able to adjust the anti-interference that threshold values keeps certain, but this technical scheme exists can only carry out certain threshold values control to the forward signal of telecommunication, if the Mintrop wave triggering signal is the negative sense signal of telecommunication, easily occur that triggering the negative Mintrop wave of signal loses, the problem of acquisition system of cannot correctly initiating earthquake, causes that bigger error occurs in earthquake data acquisition。
Summary of the invention
It is an object of the invention to solve the problem that in above-mentioned prior art, earthquake data acquisition enabling signal Mintrop wave is lost, there is provided a kind of and effectively suppress interference signal, no matter Mintrop wave is just or bears, and instrument of all accurately initiating earthquake carries out the seismic data collection starter of data acquisition。
The technical solution adopted for the present invention to solve the technical problems is: the seismic data collection starter that a kind of threshold value can be arranged, powered by regulated power supply, including the input interface electrically connected with external trigger circuit, the output interface electrically connected with seismic instrument and signal amplification circuit, the input of described signal amplification circuit electrically connects with input interface, the outfan of described signal amplification circuit electrically connects with output interface, the seismic data collection starter that described threshold value can be arranged also includes threshold value absolute value and arranges circuit and absolute value comparison circuit, described signal amplification circuit is absolute value signal amplifying circuit, the input of described absolute value comparison circuit electrically connects with interface circuit, the input of outfan and absolute value comparison circuit that described threshold value absolute value arranges circuit electrically connects, the outfan of absolute value comparison circuit electrically connects with the input of absolute value signal amplifying circuit, the outfan of absolute value signal amplifying circuit electrically connects with output interface。Threshold value in the present invention arranges circuit can freely be set threshold value by user, interference signal is big, it is just big that threshold value is arranged, and interference signal is little, and it is just little that threshold value is arranged, when external trigger signal absolute value is less than the threshold value pre-set, absolute amplifying circuit cannot export enabling signal, and geological data cannot gather, otherwise definitely amplifying circuit exports enabling signal, start geological data to be acquired, thus inhibiting the false triggering that interference signal causes；And the threshold value arranged in the present invention is that absolute value also ensure that the Mintrop wave no matter triggering signal is positive Mintrop wave or negative Mintrop wave, as long as triggering the absolute value of signal Mintrop wave more than threshold value, so definitely amplifying circuit, no matter the signal of front end is just or negative, its output all can drive output interface, so when using seismic wave as triggering signal, no matter Mintrop wave is just or bears, instrument of all initiating earthquake carries out data acquisition, improve the efficiency of seismic instrument data acquisition, expand the use scope of seismic instrument data acquisition, thus obtaining the geological data data of high-quality。
As preferably, the outfan that described threshold value absolute value arranges circuit includes positive output end and negative output terminal, the input of described absolute value comparison circuit includes positive threshold value input, negative threshold value input, seismic signal input, the outfan of described absolute value comparison circuit includes just comparing outfan and compares outfan with negative, the input of described absolute value signal amplifying circuit includes just comparing input and compares input with negative, the positive threshold value input of positive output end and absolute value comparison circuit that described threshold value absolute value arranges circuit electrically connects, the negative threshold value input of negative output terminal and absolute value comparison circuit that described threshold value absolute value arranges circuit electrically connects, the seismic signal input of described absolute value comparison circuit electrically connects with interface circuit, the outfan that just compares of described absolute value comparison circuit electrically connects with the input that just compares of absolute value signal amplifying circuit, the negative outfan that compares of described absolute value comparison circuit compares input electrical connection with the negative of absolute value signal amplifying circuit。So arrange, be adopt by trigger signal arrange with threshold value absolute value respectively in circuit arrange on the occasion of and negative value compare, when trigger signal more than threshold value absolute value arrange in circuit arrange on the occasion of, then absolute value comparison circuit just compares input by positive output end output drive signal to absolute value signal amplifying circuit, and absolute value signal amplifying circuit output enabling signal is to output interface。
As preferably, described threshold value absolute value arranges circuit and includes resistance R1, resistance R2, first digital regulation resistance U1, second digital regulation resistance U2, first press button SW1, second press button SW2 and the three press button SW3, the the first conduction terminal electrical connection by resistance R1 and the first press button SW1 of the positive voltage output end of described regulated power supply, the positive voltage output end of described regulated power supply is also by the first conduction terminal electrical connection of resistance R2 and the first press button SW1, the second conduction terminal ground connection of the first press button SW1, the current potential of the first digital regulation resistance U1 and the second digital regulation resistance U2 rises and controls end each through the second press button SW2 ground connection, the current potential of the first digital regulation resistance U1 and the second digital regulation resistance U2 declines and controls end each through the 3rd press button SW3 ground connection, first digital regulation resistance U1, the power end of the second digital regulation resistance U2 electrically connects with the positive voltage output end of regulated power supply, first digital regulation resistance U1, the earth terminal of the second digital regulation resistance U2 and the reference equal ground connection of cold end, the reference hot end of the first digital regulation resistance U1 electrically connects with the positive voltage output end of regulated power supply, the reference hot end of the second digital regulation resistance U2 electrically connects with the negative voltage outfan of regulated power supply, the negative output terminal that the outfan of the first digital regulation resistance U1 arranges circuit as threshold value absolute value electrically connects with absolute value comparison circuit, the outfan of the second digital regulation resistance U2 arranges positive output end and the absolute value comparison circuit of circuit as threshold value absolute value。So arrange, the current potential of the first digital regulation resistance U1 and the second digital regulation resistance U2 rises and controls end each through the second press button SW2 ground connection, the current potential of the first digital regulation resistance U1 and the second digital regulation resistance U2 declines and controls end each through the 3rd press button SW3 ground connection, the reference hot end of the first digital regulation resistance U1 and the second digital regulation resistance U2 is all identical with the absolute value with reference to cold end, so the output voltage values absolute value of the first digital regulation resistance U1 and the second digital regulation resistance U2 is also identical, such user by pressing the second press button SW2 or can be pressed the 3rd press button SW3 and adjusts threshold value, determined by the first press button SW1 and store this threshold value, now the output valve of the second digital regulation resistance U2 is negative marginal value, the output valve of the first digital regulation resistance U1 is positive marginal value, the absolute value of negative marginal value is equal to positive marginal value, thus the absolute value completing threshold value is arranged。
As preferably, described absolute value comparison circuit includes twin voltage comparator U3, first negative input of twin voltage comparator U3 electrically connects with negative threshold value input, second electrode input end of twin voltage comparator U3 electrically connects with positive threshold value input, first electrode input end and second negative input of twin voltage comparator U3 electrically connect with seismic signal input, first outfan of twin voltage comparator U3 electrically connects with just comparing outfan, and second outfan of twin voltage comparator U3 compares outfan electrical connection with negative。So arrange, first electrode input end of twin voltage comparator U3 and the second negative input obtain and trigger signal, the positive marginal value that first negative input input value is threshold value of twin voltage comparator U3, the negative marginal value that second electrode input end input value is threshold value of twin voltage comparator U3, when the waveform of triggering signal is more than positive marginal value, the first outfan output high level of twin voltage comparator U3, the second outfan output low level of twin voltage comparator U3, when trigger signal waveform less than positive marginal value more than negative marginal value time, first outfan of twin voltage comparator U3 is the second equal output low level of outfan then, when the waveform of triggering signal is less than negative marginal value, the second outfan output high level of twin voltage comparator U3。
As preferably, described absolute value signal amplifying circuit includes the first audion T1, second audion T2, resistance R9, resistance R10, resistance R11, resistance R12, resistance R13, resistance R14 and with door U6, the base stage of described first audion T1 is electrically connected with just comparing input by resistance R9, the base stage of the first audion T1 is also by resistance R11 ground connection, the grounded emitter of the first audion T1, the colelctor electrode of the first audion T1 is electrically connected with the positive voltage output end of regulated power supply by resistance R12, the colelctor electrode of described first audion T1 also electrically connects with an input with door U6, the base stage of described second audion T2 compares input electrical connection by resistance R10 with negative, the base stage of the second audion T2 is also by resistance R13 ground connection, the grounded emitter of the second audion T2, the colelctor electrode of the second audion T2 is electrically connected with the positive voltage output end of regulated power supply by resistance R14, the colelctor electrode of described second audion T2 also electrically connects with another input with door U6, electrically connect with output interface with the outfan of door U6。So arrange, just comparing input and the negative input state comparing input can only be that a high level inputs a low level input or the input of two low levels, when just to compare input input be low level, negative when comparing input input also for low level, first audion T1 and the second audion T2 is all not turned on, the colelctor electrode of the first audion T1 and the equal high level of colelctor electrode of the second audion T2, it is high level with the two of door inputs, exports high level with door；When wherein just comparing input input for high level, first audion T1 conducting, the colelctor electrode of the first audion T1 is output as low level, and the colelctor electrode of the second audion T2 is output as high level, high level and low level do with computing after with door output low level, obviously when negative compare input input for high level time, also it is low level with door output, this ensures that there when triggering signal and being in threshold range, it is output as high level with door, when triggering signal and not dropping in threshold range, no matter positive and negative, it is low level with door output, reach high level to low level transition, precisely start seismic instrument, improve the efficiency of seismic instrument data acquisition, expand the use scope of seismic instrument data acquisition, thus obtaining the geological data data of high-quality。
As preferably, first outfan of described twin voltage comparator U3 passes sequentially through resistance R7 and resistance R8 and electrically connects with second outfan of twin voltage comparator U3, resistance R7 is identical with resistance R8 resistance value, and described resistance R7 electrically connects with the positive voltage output end of regulated power supply with the junction of resistance R8。So arrange, it is ensured that the reference voltage value of twin voltage comparator U3 output is equal to the positive voltage value of regulated power supply, say, that the signal of twin voltage comparator U3 output can directly drive follow-up value signal amplifying circuit when being high level。
As preferably, the absolute value of voltage of the positive voltage output end output of described regulated power supply is equal with the absolute value of voltage that the negative voltage outfan of regulated power supply exports。So arrange so that the negative voltage of the output of regulated power supply can export, as with regulated power supply, the benchmark negative voltage that positive voltage is corresponding。
The invention has the beneficial effects as follows: the present invention improves capacity of resisting disturbance, inhibit the false triggering that interference signal causes, simultaneously, present invention uses the mode that absolute value compares, no matter triggering signal Mintrop wave to be just or bear, instrument of all initiating earthquake carries out data acquisition, improves the efficiency of seismic instrument data acquisition, expand the use scope of seismic instrument data acquisition, thus obtaining the geological data data of high-quality。
Accompanying drawing explanation
Fig. 1 is a kind of circuit block diagram of the present invention。
Fig. 2 is a kind of circuit theory diagrams that in the present invention, threshold value absolute value arranges circuit。
Fig. 3 is a kind of circuit theory diagrams of absolute value comparison circuit in the present invention。
Fig. 4 is a kind of circuit theory diagrams of absolute value signal amplifying circuit in the present invention。
In figure: 1, input interface, 2, threshold value absolute value circuit is set, 3, absolute value comparison circuit, 4, absolute value signal amplifying circuit, 5, output interface。
Detailed description of the invention
Below by specific embodiment, and in conjunction with accompanying drawing, technical scheme is described in further detail。
Embodiment: the seismic data collection starter that a kind of threshold value can be arranged, powered by regulated power supply, the regulated power supply adopted in the present embodiment adopts positive voltage output end to export 3.3 volts of voltages, the regulated power supply of the negative 3.3 volts of voltages of negative voltage outfan output, the present embodiment is applicable to various seismic instruments (referring to accompanying drawing 1), the present embodiment includes the input interface 1 electrically connected with external trigger circuit, the output interface 5 electrically connected with seismic instrument, threshold value absolute value arranges circuit 2, absolute value comparison circuit 3 and absolute value signal amplifying circuit 4, threshold value absolute value arranges the outfan of circuit 2 and includes positive output end and negative output terminal, the input of absolute value comparison circuit 3 includes positive threshold value input, negative threshold value input, seismic signal input, the outfan of absolute value comparison circuit 3 includes just comparing outfan and compares outfan with negative, the input of absolute value signal amplifying circuit 4 includes just comparing input and compares input with negative, the positive threshold value input of positive output end and absolute value comparison circuit 3 that threshold value absolute value arranges circuit 2 electrically connects, the negative threshold value input of negative output terminal and absolute value comparison circuit 3 that threshold value absolute value arranges circuit 2 electrically connects, the seismic signal input of absolute value comparison circuit 2 electrically connects with interface circuit 1, the outfan that just compares of absolute value comparison circuit 3 electrically connects with the input that just compares of absolute value signal amplifying circuit 4, the negative outfan that compares of absolute value comparison circuit 3 compares input electrical connection with the negative of absolute value signal amplifying circuit 4。
Threshold value absolute value arranges circuit 2 and includes resistance R1, resistance R2, first digital regulation resistance U1, second digital regulation resistance U2, first press button SW1, second press button SW2 and the three press button SW3(is referring to accompanying drawing 2), the the first conduction terminal electrical connection by resistance R1 and the first press button SW1 of the positive voltage output end of regulated power supply, the positive voltage output end of regulated power supply is also by the first conduction terminal electrical connection of resistance R2 and the first press button SW1, the second conduction terminal ground connection of the first press button SW1, the current potential of the first digital regulation resistance U1 and the second digital regulation resistance U2 rises and controls end each through the second press button SW2 ground connection, the current potential of the first digital regulation resistance U1 and the second digital regulation resistance U2 declines and controls end each through the 3rd press button SW3 ground connection, first digital regulation resistance U1, the power end of the second digital regulation resistance U2 electrically connects with the positive voltage output end of regulated power supply, first digital regulation resistance U1, the earth terminal of the second digital regulation resistance U2 and the reference equal ground connection of cold end, the reference hot end of the first digital regulation resistance U1 electrically connects with the positive voltage output end of regulated power supply, the reference hot end of the second digital regulation resistance U2 electrically connects with the negative voltage outfan of regulated power supply, the outfan of the first digital regulation resistance U1 electrically connects as the negative threshold value input of negative output terminal and absolute value comparison circuit that threshold value absolute value arranges circuit, the outfan of the second digital regulation resistance U2 electrically connects as the positive threshold value input of positive output end and absolute value comparison circuit that threshold value absolute value arranges circuit。First digital regulation resistance U1, the second digital regulation resistance U2 all adopt X9511 chip, X9511 chip is a desirable button control potentiometer, 31 resistance unit arrays and E2PROM memorizer is contained inside it, have, with any one end, the tap that can be accessed by sliding end between each resistance unit, the position of sliding end is controlled end by current potential rising and current potential decline controls end and controls, the position of sliding end can be stored in E2PROM memorizer, will be newly called when next time powers on use。Threshold value absolute value arranges circuit 2 and also includes the electric capacity C1 of filtering, electric capacity C2, electric capacity C3, electric capacity C4, electric capacity C5, electric capacity C6, after electric capacity C1 and electric capacity C2 parallel connection, one end electrically connects with the power end of the first digital regulation resistance U1 and the reference hot end of the first digital regulation resistance U1, other end ground connection；After electric capacity C3 and electric capacity C4 parallel connection, one end electrically connects with the power end of the second digital regulation resistance U2, other end ground connection；Other end ground connection；After electric capacity C5 and electric capacity C6 parallel connection, one end electrically connects with the reference hot end of the second digital regulation resistance U2, other end ground connection。
Absolute value comparison circuit 3 includes twin voltage comparator U3(referring to accompanying drawing 3), first negative input of twin voltage comparator U3 electrically connects with negative threshold value input, second electrode input end of twin voltage comparator U3 electrically connects with positive threshold value input, first electrode input end and second negative input of twin voltage comparator U3 electrically connect with seismic signal input, first outfan of twin voltage comparator U3 electrically connects with just comparing outfan, second outfan of twin voltage comparator U3 compares outfan electrical connection with negative, first electrode input end of twin voltage comparator U3 is also electrically connected with resistance R3, first negative input of twin voltage comparator U3 is also electrically connected with resistance R4, second electrode input end of twin voltage comparator U3 is also electrically connected with resistance R6, second negative input of twin voltage comparator U3 is also electrically connected with resistance R5, resistance R3, resistance R4, resistance R5, the equal ground connection of resistance R6。Twin voltage comparator U3 adopts LM2903M chip, including two non-interfering independent low-voltage comparator, the positive pole of LM2903M chip electrically connects with the positive voltage output end of regulated power supply, the negative pole of LM2903M chip electrically connects with the negative voltage outfan of regulated power supply, in order to ensure the voltage waveform of LM2903M chip, the present embodiment also includes electric capacity C7, electric capacity C8, electric capacity C9, electric capacity C10, the plus earth of electric capacity C7 and electric capacity C8, the negative pole of electric capacity C8 and electric capacity C7 electrically connects with the negative voltage outfan of regulated power supply, the minus earth of electric capacity C10 and electric capacity C9, the positive pole of electric capacity C10 and electric capacity C9 electrically connects with the positive voltage output end of regulated power supply。
Absolute value signal amplifying circuit 4 includes the first audion T1, second audion T2, resistance R9, resistance R10, resistance R11, resistance R12, resistance R13, resistance R14 and with door U6(referring to accompanying drawing 4), the base stage of described first audion T1 is electrically connected with just comparing input by resistance R9, the base stage of the first audion T1 is also by resistance R11 ground connection, the grounded emitter of the first audion T1, the colelctor electrode of the first audion T1 is electrically connected with the positive voltage output end of regulated power supply by resistance R12, the colelctor electrode of described first audion T1 also electrically connects with an input with door U6, the base stage of described second audion T2 compares input electrical connection by resistance R10 with negative, the base stage of the second audion T2 is also by resistance R13 ground connection, the grounded emitter of the second audion T2, the colelctor electrode of the second audion T2 is electrically connected with the positive voltage output end of regulated power supply by resistance R14, the colelctor electrode of described second audion T2 also electrically connects with another input with door U6, electrically connect with output interface 5 with the outfan of door U6。The audion that first audion T1 and the second audion T2 all adopts model to be 9013, for NPN type low frequency audion, amplification is maximum up to 110 times。
When the present embodiment uses, first by user, threshold size is set according to the interference signal triggering signal of external trigger circuit, interference signal is big, it is just big that threshold value is arranged, interference signal is little, it is just little that threshold value is arranged, when threshold value is set, owing to the reference hot end of the first digital regulation resistance U1 inputs as positive 3.3 volts, it it is 0 volt with reference to cold end input, the reference hot end input of the second digital regulation resistance U2 is 0 volt, it is negative 3.3 volts with reference to cold end input, the inside with the second digital regulation resistance U2 of the first digital regulation resistance U1 contains 31 resistance unit arrays, one has 32 contacts, all-in resistance is 10K, centre tap every liter or drop the output voltage values of one-level and all change about 3.3 ÷ 31 ≈ ± 0.1V, namely ± 100mv, so user can by the second press button SW2 and the three press button SW3 control the first digital regulation resistance U1 and the second digital regulation resistance U2 current potential rise control end and current potential decline control end dead electricity, user often presses a second press button SW2, the output voltage values of the first digital regulation resistance U1 and forward improve 100mv, the voltage output value of the second digital regulation resistance U2 and negative sense improve 100mv, user often presses order three press button SW3, the output voltage values of the first digital regulation resistance U1 and forward reduce 100mv, the voltage output value of the second digital regulation resistance U2 and negative sense reduce 100mv, after reaching user target potential, user can be pressed the first button SW1 and the value set is stored, do not lose owing to these values are stored in E2PROM power down, therefore the value set can be used in the future again。By above operation, the output voltage values of the first digital regulation resistance U1 is the positive marginal value of threshold value, the output voltage values of the second digital regulation resistance U2 is the negative marginal value of threshold value, threshold value absolute value arranges circuit 2 and completes the absolute value setting of threshold value, threshold value absolute value arranges circuit 2 and the positive marginal value of threshold value is transmitted to absolute value comparison circuit 3 by positive output end, and threshold value absolute value arranges circuit 2 by the negative marginal value of threshold value by negative output terminal transmission to absolute value comparison circuit 3。
During threshold value output, absolute value comparison circuit 3 obtains the positive marginal value of threshold value and negative marginal value respectively through positive threshold value input, negative threshold value input, absolute value comparison circuit 3 receives also by input interface 1 and triggers signal, wherein trigger signal and input the first electrode input end and the second negative input, the positive marginal value of threshold value inputs the first negative input, the negative marginal value of threshold value inputs the second electrode input end, and twin voltage comparator U3 compares with the negative marginal value of the positive marginal value of threshold value, threshold value respectively by triggering signal；When triggering signal value is more than the positive marginal value of threshold value, the first outfan output high level of twin voltage comparator U3, the second outfan output low level；When triggering signal value is less than the negative marginal value of threshold value, the second outfan output high level of twin voltage comparator U3, the first outfan output high level；When triggering the signal value negative marginal value more than threshold value and the positive marginal value less than threshold value, the first outfan output low level of twin voltage comparator U3, the second outfan also output low level。With the existence of resistance R7 and resistance R8, so the signal of the signal of the first outfan output of twin voltage comparator U3 and the output of the second outfan, it is controlled in more than 0v。Absolute value comparison circuit 3 completes the comparing function triggering signal with threshold value, triggering signal with the comparative result of the positive marginal value of threshold value is that the first output wave is exported by just comparing outfan, and triggering signal with the comparative result of the positive marginal value of threshold value is that the second output wave is compared outfan output by negative。
Absolute value signal amplifying circuit 4 obtains the first output wave by just comparing input, absolute value signal amplifying circuit 4 is compared input obtained the second output wave by negative, according to described previously, during normality, trigger the signal negative marginal value more than threshold value and the positive marginal value less than threshold value, now the first output wave and the second output wave are low level, now, first audion T1 and the second audion T2 is turned off, the colelctor electrode output of the first audion T1 and the second audion T2 is high level, two high level phases are still high level with output, seismic instrument can not be triggered；When triggering signal is more than the positive marginal value of threshold value, first output wave is high level, second output wave is low level, first audion T1 conducting, the colelctor electrode output low level of the first audion T1, the second audion T2 turns off, the colelctor electrode output high level of the second audion T2, high level and low level phase and output low level, it is achieved high level to low level transition, the effect of the instrument that reaches precisely to initiate earthquake；When triggering signal is less than the negative marginal value of threshold value, first output wave is low level, second output wave is high level, second audion T2 conducting, the colelctor electrode output low level of the second audion T2, the first audion T1 turns off, the colelctor electrode output high level of the first audion T1, high level and low level phase and output low level, it is achieved high level to low level transition, the effect of the instrument that reaches equally precisely to initiate earthquake。Accordingly, we can draw, the oscillogram when present invention uses, when triggering signal more than the positive marginal value of threshold value or when triggering signal less than the negative marginal value of threshold value, seismic instrument all can be triggered, reach no matter trigger signal Mintrop wave to be just or bear, as long as the absolute value triggering signal carries out data acquisition more than the absolute value of threshold value instrument of all initiating earthquake, improve the efficiency of seismic instrument data acquisition, expand the use scope of seismic instrument data acquisition, thus obtaining the geological data data of high-quality。
Embodiment described above is the one preferably scheme of the present invention, not the present invention is done any pro forma restriction, also has other variant and remodeling under the premise without departing from the technical scheme described in claim。
Claims (6)
1. the seismic data collection starter that a threshold value can be arranged, powered by regulated power supply, including the input interface electrically connected with external trigger circuit, the output interface electrically connected with seismic instrument and signal amplification circuit, the input of described signal amplification circuit electrically connects with input interface, the outfan of described signal amplification circuit electrically connects with output interface, it is characterized in that: the seismic data collection starter that described threshold value can be arranged also includes threshold value absolute value and arranges circuit and absolute value comparison circuit, described signal amplification circuit is absolute value signal amplifying circuit, the input of described absolute value comparison circuit electrically connects with interface circuit, the input of outfan and absolute value comparison circuit that described threshold value absolute value arranges circuit electrically connects, the outfan of absolute value comparison circuit electrically connects with the input of absolute value signal amplifying circuit, the outfan of absolute value signal amplifying circuit electrically connects with output interface；
The outfan that described threshold value absolute value arranges circuit includes positive output end and negative output terminal, the input of described absolute value comparison circuit includes positive threshold value input, negative threshold value input, seismic signal input, the outfan of described absolute value comparison circuit includes just comparing outfan and compares outfan with negative, the input of described absolute value signal amplifying circuit includes just comparing input and compares input with negative, the positive threshold value input of positive output end and absolute value comparison circuit that described threshold value absolute value arranges circuit electrically connects, the negative threshold value input of negative output terminal and absolute value comparison circuit that described threshold value absolute value arranges circuit electrically connects, the seismic signal input of described absolute value comparison circuit electrically connects with interface circuit, the outfan that just compares of described absolute value comparison circuit electrically connects with the input that just compares of absolute value signal amplifying circuit, the negative outfan that compares of described absolute value comparison circuit compares input electrical connection with the negative of absolute value signal amplifying circuit。
2. the seismic data collection starter that threshold value according to claim 1 can be arranged, it is characterized in that: described threshold value absolute value arranges circuit and includes resistance R1, resistance R2, first digital regulation resistance U1, second digital regulation resistance U2, first press button SW1, second press button SW2 and the three press button SW3, the the first conduction terminal electrical connection by resistance R1 and the first press button SW1 of the positive voltage output end of described regulated power supply, the positive voltage output end of described regulated power supply is also by the first conduction terminal electrical connection of resistance R2 and the first press button SW1, the second conduction terminal ground connection of the first press button SW1, the current potential of the first digital regulation resistance U1 and the second digital regulation resistance U2 rises and controls end each through the second press button SW2 ground connection, the current potential of the first digital regulation resistance U1 and the second digital regulation resistance U2 declines and controls end each through the 3rd press button SW3 ground connection, first digital regulation resistance U1, the power end of the second digital regulation resistance U2 electrically connects with the positive voltage output end of regulated power supply, first digital regulation resistance U1, the earth terminal of the second digital regulation resistance U2 and the reference equal ground connection of cold end, the reference hot end of the first digital regulation resistance U1 electrically connects with the positive voltage output end of regulated power supply, the reference hot end of the second digital regulation resistance U2 electrically connects with the negative voltage outfan of regulated power supply, the negative output terminal that the outfan of the first digital regulation resistance U1 arranges circuit as threshold value absolute value electrically connects with absolute value comparison circuit, the outfan of the second digital regulation resistance U2 arranges positive output end and the absolute value comparison circuit of circuit as threshold value absolute value。
3. the seismic data collection starter that threshold value according to claim 1 can be arranged, it is characterized in that: described absolute value comparison circuit includes twin voltage comparator U3, first negative input of twin voltage comparator U3 electrically connects with negative threshold value input, second electrode input end of twin voltage comparator U3 electrically connects with positive threshold value input, first electrode input end and second negative input of twin voltage comparator U3 electrically connect with seismic signal input, first outfan of twin voltage comparator U3 electrically connects with just comparing outfan, second outfan of twin voltage comparator U3 compares outfan electrical connection with negative。
4. the seismic data collection starter that threshold value according to claim 1 can be arranged, it is characterized in that: described absolute value signal amplifying circuit includes the first audion T1, second audion T2, resistance R9, resistance R10, resistance R11, resistance R12, resistance R13, resistance R14 and with door U6, the base stage of described first audion T1 is electrically connected with just comparing input by resistance R9, the base stage of the first audion T1 is also by resistance R11 ground connection, the grounded emitter of the first audion T1, the colelctor electrode of the first audion T1 is electrically connected with the positive voltage output end of regulated power supply by resistance R12, the colelctor electrode of described first audion T1 also electrically connects with an input with door U6, the base stage of described second audion T2 compares input electrical connection by resistance R10 with negative, the base stage of the second audion T2 is also by resistance R13 ground connection, the grounded emitter of the second audion T2, the colelctor electrode of the second audion T2 is electrically connected with the positive voltage output end of regulated power supply by resistance R14, the colelctor electrode of described second audion T2 also electrically connects with another input with door U6, electrically connect with output interface with the outfan of door U6。
5. the seismic data collection starter that threshold value according to claim 3 can be arranged, it is characterized in that: first outfan of described twin voltage comparator U3 passes sequentially through resistance R7 and resistance R8 and electrically connects with second outfan of twin voltage comparator U3, resistance R7 is identical with resistance R8 resistance value, and described resistance R7 electrically connects with the positive voltage output end of regulated power supply with the junction of resistance R8。
6. the seismic data collection starter that the threshold value according to claim 1 or 2 or 4 or 5 can be arranged, it is characterised in that: the absolute value of voltage of the positive voltage output end output of described regulated power supply is equal with the absolute value of voltage that the negative voltage outfan of regulated power supply exports。
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