CN103605155A - High-precision earthquake collector of wireless ad hoc network - Google Patents
High-precision earthquake collector of wireless ad hoc network Download PDFInfo
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- CN103605155A CN103605155A CN201310643983.6A CN201310643983A CN103605155A CN 103605155 A CN103605155 A CN 103605155A CN 201310643983 A CN201310643983 A CN 201310643983A CN 103605155 A CN103605155 A CN 103605155A
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Abstract
The invention discloses a high-precision earthquake collector of a wireless ad hoc network. The high-precision earthquake collector comprises a master control unit as a control center, an earthquake wave sensor and a power supply unit for supplying power, the master control unit is connected with external wireless communication equipment through a wireless network communication unit connected with the master control unit, the earthquake wave sensor is used for collecting earthquake wave data information, the signal output end of the earthquake wave sensor is connected with the master control unit through a signal processing unit used for carrying out filtering amplification processing on earthquake wave analog signals, and the power supply unit is respectively connected with the master control unit, the signal processing unit and the wireless network communication unit. The high-precision earthquake collector is simple in structure, and eliminates the complexity of wire arrangement, meanwhile, obtained signals are more accurate, and convenience is brought to the analysis of work staff. The high-precision earthquake collector is suitable for detecting earthquake waves in earth internal structure study, project exploration and detection, geological disaster predication and other fields.
Description
Technical field
The invention belongs to seismic event and gather field, relate in particular to the seismic event collection of wireless self-networking, specifically a kind of high precision wireless MANET earthquake-capturing device.
Background technology
Earthquake exploration method is the important method that in the relevant Exploration Domain such as oil, day hot gas or mineral deposit, often the exploration subterranean layer of use is constructed, and seismic survey is generally realized by seismic instrument.Along with the expansion of seismic survey scale, seismic instrument field construction road number is more and more, construction ground surface condition becomes increasingly complex, operating efficiency requires more and more higher in recent years.And between the collection Dao Yu road of traditional seismic instrument, adopt cable to connect, so, before construction, need extensive work personnel field wiring, measuring while finishing also needs take-up, and work efficiency is lower; When running into expressway, railway and water system, the wiring of wired seismic instrument just becomes a difficult problem.Therefore, when complex-terrain carries out seismic survey, need a kind of earthquake-capturing device of Wireless Data Transmission data are gathered and transmit, but wireless seismic collector of the prior art is fewer, ratio of precision is lower simultaneously, can not meet the demand of analysis to the acquisition and processing of data.
Summary of the invention
In order to solve above-mentioned technical matters, the invention provides a kind of high precision wireless MANET earthquake-capturing device, without loaded down with trivial details wiring, just can adapt to multiple landform demand, the data precision simultaneously gathering with it is high, can provide reliable data for subsequent analysis.
For achieving the above object, the technical solution adopted in the present invention is as follows:
A high precision wireless MANET earthquake-capturing device, comprises
As the main control unit of control center, it is connected with external wireless communication equipment by coupled wireless networking communication unit;
Be used for the locality seismic event sensor of seismic wave data message, its signal output part is by connecting main control unit for seismic event simulating signal being carried out to the signal processing unit of filter amplifying processing;
For the power supply unit of powering, it connects respectively main control unit, signal processing unit, and wireless networking communication unit.
As limitation of the invention: described high precision wireless MANET earthquake-capturing device also comprises the GPS time service unit of being controlled and then controlled main control unit energising operation by outer remote, and described GPS time service unit is located between power supply unit and main control unit.
As another kind of the present invention is limited: described signal processing unit comprises the filtration module for the simulating signal gathering is carried out to filtering processing, the signal output part of described filtration module connects the signal input part of the floating-point amplifier module for simulating signal is amplified, and the signal output part of described floating-point amplifier module is by connecting main control unit for simulating signal being converted to the A/D modular converter of digital signal.
As limitation of the invention further: described filtration module comprises the pre-amplification circuit of processing for simulating signal is amplified, the signal input part of described pre-amplification circuit connects seismic event sensor, its signal output part connects for simulating signal being carried out to the signal input part of the filtering circuit of removal of impurities, and the signal output part of described filtering circuit connects for simulating signal being carried out to the signal input part of the buffering delay circuit of buffered;
Described floating-point amplifier module comprises for simulating signal being carried out to amplitude judgement, and can selecting the amplitude anticipation circuit of multiple that simulating signal is amplified; The signal input part of described amplitude anticipation circuit receives the simulating signal of buffering time delay road output, and signal output part control linkage can change the floating-point amplifier circuit of enlargement factor; The input end of described floating-point amplifier circuit receives the simulating signal of buffering delay circuit output, and signal output part connects follow-up high-precision A/D change-over circuit
As further limiting again of the present invention: described pre-amplification circuit comprises the reverse spike voltage holding circuit for the protection of reverse spike voltage, the signal input part of described reverse spike voltage holding circuit connects seismic event sensor, and its signal output part connects the amplifying circuit for simulating signal is amplified;
Described filtering circuit comprises the notch filter circuit that the signal after pre-amplification circuit is amplified carries out further removal of impurities; The signal input part of described notch filter circuit connects the signal output part of amplifying circuit, and its signal output part connects for simulating signal being carried out to the signal input part of the low-pass filter circuit of low-pass filtering; The signal output part of described low-pass filter circuit connects for simulating signal being carried out to the signal input part of the circuit of high pass filter of high-pass filtering;
Described buffering delay circuit comprises for simulating signal being carried out to the input buffer circuit of buffered; The signal input part of described input buffer circuit connects the signal output part of circuit of high pass filter, and its signal output part connects for simulating signal being carried out to the signal input part of the time delay input buffer circuit of delay process.
As further limiting of the present invention:
Described pre-amplification circuit is also provided with two for data acquisition channel being carried out to the clear and coherent self-test signal input end detecting, the positive pole of described self-test signal input end is connected with the main control unit of seismic event collector when carrying out self check, and negative pole is ground connection when carrying out self check; Between reverse spike voltage holding circuit and amplifying circuit, be provided with the selected on-off circuit that one of gating detection signal or self-test signal are inputted.
The signal input part of described amplitude anticipation circuit connects the signal output part of buffering delay circuit, comprises the main control unit as control center, is provided with A/D translation function, and is provided with the reference value of at least two digital signals in described main control unit;
Described floating-point amplifier circuit comprise signal is not done amplify to change without amplifying circuit, and the amplifying circuit that at least one-level is amplified signal; The described signal input part without amplifying circuit and amplifying circuit is under the control of amplitude anticipation circuit, select the simulating signal of a reception seismic event device acquisition buffer delay circuit output, the described signal output part without amplifying circuit and amplifying circuit is connected under the control of amplitude anticipation circuit, to carry out the signal input part of the MUX of gating output without amplifying circuit and amplifying circuit; The signal output part of MUX connects follow-up high-precision A/D change-over circuit.
As the darkest step of the present invention is limited: the main control unit of described amplitude anticipation circuit is the main control unit in earthquake-capturing device;
Described amplifying circuit comprises one-level amplifying circuit, second amplifying circuit, three-stage amplifier,
The signal input part of described one-level amplifying circuit receives the simulating signal of buffering delay circuit output under the control of amplitude anticipation circuit, and signal output part connects in second amplifying circuit or MUX under the control of floating-point anticipation circuit,
The signal output part of described second amplifying circuit connects in three-stage amplifier or MUX under the control of floating-point anticipation simulation,
The signal output part of described three-stage amplifier connects MUX.
Owing to having adopted above technical scheme, the present invention can reach following technique effect:
(1) the present invention is provided with wireless networking communication unit, main control unit can communicate with outside wireless communication unit by this communication unit, realized the wireless transmission of information, saved the loaded down with trivial details of wiring, guaranteed that the present invention can be adapted to any landform and carry out seismic event collection;
(2) the present invention is also provided with GPS time service unit, and it can open at any time earthquake-capturing device and carry out information acquisition under the Long-distance Control of control terminal, has realized the real-time of earthquake-capturing device exploration;
(3) signal processing unit comprises filtration module, floating-point amplifier module, high-precision A/D modulus of conversion module, can carry out to the simulating signal gathering the processing of filtering, amplification and A/D conversion, wherein filtration module includes pre-amplification circuit, filtering circuit and buffering delay circuit, therefore can carry out sufficient removal of impurities, filtering to the simulating signal collecting, the processing signals precision that order obtains is higher; And floating-point amplifier module comprises amplitude anticipation circuit and the floating-point amplifier circuit that can select enlargement factor, signal after can processing filtration module and pre-stored reference value are compared, after comparison, controlling floating-point amplifier circuit selects corresponding enlargement factor to amplify simulating signal, the signal that assurance obtains meets the scope of application of high-precision A/D modular converter, and the signal that order finally obtains is more accurate.
In sum, the present invention is simple in structure, has saved the loaded down with trivial details of wiring, more accurate with the signal that finally obtain season, for staff's analysis provides convenience.
The present invention is applicable to the fields such as earth ' s internal structure research, engineering exploration and detection, geological hazards prediction seismic event is detected.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the embodiment of the present invention;
Fig. 2 is the circuit theory diagrams of pre-amplification circuit 311 in the filtration module 31 of signal processing unit 3 embodiment illustrated in fig. 1;
Fig. 3 is the circuit theory diagrams of filtering circuit 312 in the filtration module 31 of signal processing unit 3 embodiment illustrated in fig. 1;
Fig. 4 cushions the circuit theory diagrams of delay circuit 313 in the filtration module 31 of signal processing unit 3 embodiment illustrated in fig. 1;
Fig. 5 is the theory diagram of the floating-point amplifier module 32 of signal processing unit 3 embodiment illustrated in fig. 1;
Fig. 6 is the circuit theory diagrams of floating-point amplifier circuit U 3 in the module of floating-point amplifier shown in Fig. 5 32.
In figure: 1-main control unit, 2-seismic event sensor, 3-signal processing unit, 31-filtration module, 311-pre-amplification circuit, 312-filtering circuit, 313-buffering delay circuit, 32-floating-point amplifier module, 33-A/D modular converter, 4-wireless networking communication unit, 5-power supply unit, 6-GPS time service unit, U1-eight homophase three-state buffer, U2-amplitude anticipation circuit, U3-floating-point amplifier circuit, U4-MUX.
Embodiment
a kind of high precision wireless MANET of embodiment earthquake-capturing device
The present embodiment provides a kind of high precision wireless MANET earthquake-capturing device, and its structure is with reference to figure 1, and it comprises:
(1) main control unit 1
Wireless networking communication unit 4 in the present embodiment adopts CC2530 communication chip of the prior art, and the external circuit of chip is circuit conventional in prior art.
(2) seismic event sensor 2
Wherein, described signal processing unit 3 comprises for the simulating signal gathering being carried out to the filtration module 31 of filtering processing, floating-point amplifier module 32 for simulating signal is amplified, and for simulating signal being converted to the A/D modular converter 33 of digital signal, wherein the signal input part of filtration module 31 receives the analog information that seismic event sensor 2 gathers, its signal output part connects the signal input part of floating-point amplifier module 32, and the signal output part of floating-point amplifier module 32 connects main control unit 1 by A/D modular converter 33.
And filtration module 31 comprises:
(1) pre-amplification circuit 311
1. reverse spike voltage holding circuit
Reverse spike voltage holding circuit is for the protection of reverse spike voltage; described reverse spike voltage holding circuit comprises the first bi-directional voltage stabilizing pipe D1 and the second bi-directional voltage stabilizing pipe D2, and the series circuit that described the first bi-directional voltage stabilizing pipe D1 forms with the second bi-directional voltage stabilizing pipe D2 is connected externally seismic wave collector by two signal input part S1 of pre-amplification circuit 311 with S2.Before the series circuit of the first bi-directional voltage stabilizing diode D1 and the second bi-directional voltage stabilizing diode D2, be parallel with the first capacitor C1, be also parallel with the series circuit of the second capacitor C2 and the 3rd capacitor C3 simultaneously.
2. amplifying circuit
Amplifying circuit amplifies processing for the simulating signal that seismic event sensor 2 is collected, as shown in Figure 2, described amplifying circuit comprises the first operational amplifier UA1, the second operational amplifier UA2, the 3rd operational amplifier UA3, with and peripheral resistance, electric capacity.
In the present embodiment, the first operational amplifier UA1 and the second operational amplifier UA2 all adopt operational amplifier OP777 of the prior art, and the 3rd operational amplifier UA3 adopts operational amplifier OP07 of the prior art.
Wherein the in-phase input end of the first operational amplifier UA1 connects the first signal input end S1 of pre-amplification circuit 311 by the first resistance R 1, inverting input is connected the inverting input of the 3rd operational amplifier UA3 by the 9th resistance R 9 with the series circuit of the tenth resistance R 10, output terminal connects the intermediate node of the series circuit of the 9th resistance R 9 and the tenth resistance R 10.The in-phase input end of the second operational amplifier UA2 connects the secondary signal input end S2 of pre-amplification circuit 311 by the second resistance R 2, inverting input is connected the in-phase input end of the 3rd operational amplifier UA3 by the 11 resistance R 11 with the series circuit of the 12 resistance R 12, output terminal connects the intermediate node of the series circuit of the 11 resistance R 11 and the 12 resistance R 12.The output terminal of described the 3rd operational amplifier UA3 is as the output terminal of pre-amplification circuit 311, and the simulating signal after output is amplified is designated as CS1.
3. self-test signal input end
Whether self-test signal input end is clear and coherent for detection of data acquisition channel, the present embodiment is provided with two self-test signal input end TEST+ and TEST-, the anodal TEST+ of described self-test signal input end is connected with the main control unit 1 of seismic wave collector externally when carrying out self check, and negative pole TEST-is ground connection when carrying out self check.Meanwhile, self-test signal input end is also connected with follow-up amplifying circuit.
And in order to make self-test signal and the seismic signal detecting distinguish, the present embodiment is also provided with selected on-off circuit between reverse spike voltage holding circuit and amplifying circuit; Convenient for information transmission, the present embodiment is also provided with eight homophase three-state buffer U1 between self-test signal input end and the main control unit 1 of seismic event collector, and eight homophase three-state buffer U1 in the present embodiment adopt 74HC244 chip of the prior art.
Described selected on-off circuit can gating detection signal or self-test signal in one of signal be input in pre-amplification circuit 311.Specifically as shown in Figure 2, described selected on-off circuit comprises the first linked switch K1 and the second linked switch K2, the first linked switch K1 and the second linked switch K2 all select programmed switch chip DG303 of the prior art, have moving contact and four stationary contacts of two interlocks.Described the first linked switch K1 be connected in parallel on reverse spike holding circuit that the first bi-directional voltage stabilizing pipe D1 and the second bi-directional voltage stabilizing pipe D2 form after, the first moving contact of the first linked switch K1 connects the first input end S1 of pre-amplification circuit 311, the second moving contact connects the second input end S2 of pre-amplification circuit 311, the first stationary contact is connected the 3rd stationary contact of self by the 3rd resistance R 3 with the series circuit of the 5th resistance R 5, before the series circuit of the 3rd resistance R 3 and the 5th resistance R 5, be parallel with the 4th resistance R 4 simultaneously, the second stationary contact connects the anodal TEST+ of self-test signal input end, the 4th stationary contact connects the negative pole TEST-of self-test signal input end.The second described linked switch K2 is serially connected between the first resistance R 1, the second resistance R 2 and amplifying circuit, and wherein the first stationary contact of the second linked switch K2 connects the first resistance R 1; The second stationary contact connects the anodal TEST+ of self-test signal input end, simultaneously the second stationary contact also connect eight homophase three-state buffer U1 with 14 pin Y3; The 3rd stationary contact connects the negative pole TEST-that the second resistance R 2, the four stationary contacts connect self-test signal input end, and the 4th stationary contact also connects eight homophase three-state buffer U1 the 12 pin Y4 simultaneously; The first moving contact connects the in-phase input end of the first operational amplifier UA1; The second moving contact connects the in-phase input end of the second operational amplifier UA2.
And the signal input part of eight homophase three-state buffer U1 connects the main control unit 1 of seismic event collector, the 16 pin Y2 is connected amplifying circuit with the 18 pin Y1 by the 3rd K switch 3, the 9th pin Y5 connects the control end of the second linked switch K2, and the 7th pin Y6 connects the control end of the first linked switch K1.
In addition, in the present embodiment, in pre-amplification circuit 311, be also provided with two shielded signal end V1+ and V1-, for shielding the interference of outer signals, described two shielded signal end V1+ are connected the in-phase input end of the 3rd operational amplifier UA3 jointly with V1-by the 13 resistance R 13.
(2) filtering circuit 312
Filtering circuit 312 is for carrying out filtering processing to the simulating signal collecting, and concrete structure as shown in Figure 3, comprising:
1. notch filter circuit
Notch filter circuit carries out removal of impurities for the simulating signal after pre-amplification circuit 311 is amplified, described notch filter circuit comprises four-operational amplifier UA4, the 5th operational amplifier UA5 and peripheral resistance, capacitor, and in the present embodiment, four-operational amplifier UA4 and the 5th operational amplifier UA5 all adopt operational amplifier OP27.Wherein the in-phase input end of four-operational amplifier UA4 is connected the simulating signal CS1 of pre-amplification circuit 311 outputs with the series circuit of the 16 resistance R 16 by the 15 resistance R 15, at the two ends of the 15 resistance R 15 and the 16 resistance R 16 series circuits, be parallel with the series circuit that the 5th capacitor C5 and the 6th capacitor C6 form, while is at the intermediate node of the series circuit of the 15 resistance R 15 and the 16 resistance R 16, and between the intermediate node of the 5th capacitor C5 circuit of connecting with the 6th capacitor C6, be serially connected with the series circuit that the 4th capacitor C4 and the 17 resistance R 17 form.The inverting input of four-operational amplifier UA4 is connected with the output terminal of self, and its output terminal is by the first potentiometer RP1 ground connection.
And the in-phase input end of the 5th operational amplifier UA5 connects the intermediate node of the 4th capacitor C4 and the 17 resistance R 17 series circuits, inverting input is by the first potentiometer RP1 ground connection, and output terminal connects the in-phase input end of self.
2. low-pass filter circuit
Low-pass filter circuit is for carrying out low-pass filtering to the simulating signal after trapper removal of impurities, its concrete structure as shown in Figure 3, comprise the 6th operational amplifier UA6 and peripheral resistance thereof, capacitor, wherein the 6th operational amplifier UA6 adopts operational amplifier OP07 of the prior art, and the 6th operational amplifier UA6 in-phase input end is connected the output terminal of four-operational amplifier UA4 by the 18 resistance R 18 with the series circuit of the 19 resistance R 19, its inverting input is by the 20 resistance R 20 ground connection, also by the 21 resistance R 21, connect the output terminal of self simultaneously.
3. circuit of high pass filter
Circuit of high pass filter is for the simulating signal after low-pass filter circuit removal of impurities is carried out to high-pass filtering, and its concrete structure as shown in Figure 3, comprises the 7th operational amplifier UA7 and peripheral resistance, capacitor thereof.In the present embodiment, the 7th operational amplifier UA7 adopts operational amplifier OP4177 of the prior art, wherein the in-phase input end of the 7th operational amplifier UA7 connects the output terminal of the 6th operational amplifier UA6 by the 7th capacitor C7, simultaneously also by the 22 resistance R 22 ground connection; Its inverting input is connected the output terminal of self by the 23 resistance R 23 with the parallel circuit of the 8th capacitor C8.
(3) buffering delay circuit 313
1. input buffer circuit
Input buffer circuit is for carrying out buffered to the simulating signal of filtering circuit 312 outputs, described input buffer circuit comprises input the 8th operational amplifier UA8, the 9th operational amplifier UA9, the tenth operational amplifier UA10, and peripheral resistance, capacitor, the 8th operational amplifier UA8 in the present embodiment, the 9th operational amplifier UA9, the tenth operational amplifier UA10 all adopts operational amplifier LM741 in prior art, the series circuit that wherein in-phase input end of the 8th operational amplifier UA8 consists of with the 9th capacitor C9 the 24 resistance R 24 is connected the output terminal of the 7th operational amplifier UA7, simultaneously also by the parallel circuit ground connection of the tenth capacitor C10 and the 25 resistance R 25, its inverting input connects the output terminal of self.
The in-phase input end ground connection of described the 9th operational amplifier UA9, inverting input is by the series circuit ground connection of the 26 resistance R 26 and the 27 resistance R 27, also by the 11 capacitor C11, connect the output terminal of self, the output terminal of described the 9th operational amplifier UA9 connects the intermediate node of the 9th capacitor C9 and the 24 resistance R 24 by the 28 resistance R 28 simultaneously.
The in-phase input end ground connection of described the tenth operational amplifier UA10, inverting input, by the series circuit ground connection of the 29 resistance R 29 and the 30 resistance R 30, also connects the output terminal of self simultaneously by the 12 capacitor C12.
2. time delay buffer circuits
Time delay buffer circuits is processed for the simulating signal after input buffer circuit is processed, comprise the 11 operational amplifier UA11, and peripheral resistance, capacitor, the 11 operational amplifier UA11 in enforcement adopts operational amplifier LM324 of the prior art.Wherein the in-phase input end of the 11 operational amplifier UA11 connects the output terminal of the 8th operational amplifier UA8 by the 31 resistance R 31, simultaneously also by the 13 capacitor C13 ground connection; Described inverting input connects the output terminal of the 8th operational amplifier UA8 by the 32 resistance R 32, also by the 33 resistance R 33, be connected the output terminal of self with the parallel circuit of the 14 capacitor C14 simultaneously; Described the 11 operational amplifier UA11 also connects the output terminal of the tenth operational amplifier UA10 by the 34 resistance R 34.
Described floating-point amplifier module 32 comprises as shown in Figure 5:
(1) amplitude anticipation circuit U 2
Amplitude anticipation circuit U 2 is for carrying out amplitude judgement, and can selecting multiple that simulating signal is amplified to the simulating signal of filtration module 31 output.
Amplitude anticipation circuit U 2 comprises main control unit, and main control unit is as control center, and inside is provided with 12 A/D translation functions, and storage inside has the reference value of at least two digital signals simultaneously, and comparison program.
For simple in structure, in the present embodiment, directly adopt main control unit 1 in seismic event collector as the control center of amplitude anticipation circuit U 2.
(2) floating-point amplifier circuit U 3
The accept filter simulating signal of module 31 output of the input end of floating-point amplifier circuit U 3, under the control of amplitude anticipation circuit, select corresponding enlargement factor to amplify processing to this simulating signal, signal after processing is exported to follow-up high-precision A/D change-over circuit by MUX U4, wherein high-precision A/D change-over circuit adopts 24 AD of the prior art to amplify change-over circuit, and MUX U4 adopts existing DG509 chip to realize.
Floating-point amplifier circuit U 3 structures as shown in Figure 6, specifically comprise:
1. without amplifying circuit
Without amplifying circuit, the simulating signal of input is not done to amplify change, simulating signal does not change amplitude size, according to original amplitude, carries out follow-up A/D conversion process.
In the present embodiment, without amplifying circuit, comprise the 12 operational amplifier UA12, the 12 operational amplifier UA12 adopts existing operational amplifier OP777.
The in-phase input end of the 12 operational amplifier UA12 connects one of them stationary contact of the 8th selector switch K8, another stationary contact of the 8th selector switch K8 connects a stationary contact of the 5th selector switch K5, and the moving contact of the 8th selector switch K8 connects the simulating signal CS3 after buffering delay circuit is processed; The inverting input of the 12 operational amplifier UA12 connects the output terminal of self, and its output terminal connects the 4th signal input part IN4 of MUX U4.
2. amplifying circuit
Amplifying circuit, for the simulating signal after Acquisition Circuit acquisition process is amplified to processing, is at least provided with one-level amplifying circuit in use, and amplifying circuit also receives the simulating signal CS3 of buffering delay circuit output by the 8th selector switch K8.
In the present embodiment, according to the situation of seismic wave locality, be provided with altogether three-stage amplifier: one-level amplifying circuit, second amplifying circuit and three-stage amplifier.
One-level amplifying circuit comprises the 13 operational amplifier UA13, second amplifying circuit comprises that the tenth four-operational amplifier UA14, three-stage amplifier comprise the tenth the May 4th operational amplifier UA15, and the 13 operational amplifier UA13, the tenth four-operational amplifier UA14, the 15 operational amplifier UA15 all adopt operational amplifier OP07 of the prior art.
The in-phase input end of the 13 operational amplifier UA13 connects the moving contact of the 5th selector switch K5 by the 35 resistance R 35, and the inverting input of the 13 operational amplifier UA13 is connected the output terminal of self by the 15 capacitor C15 with the parallel circuit of the 36 resistance R 36, simultaneously also by the 37 resistance R 37 ground connection, its output terminal connects the 3rd signal input part IN3 of MUX U4, the output terminal of the 13 operational amplifier UA13 also connects a stationary contact of the 6th gauge tap K6 simultaneously, and the moving contact of the 6th gauge tap K6 connects the in-phase input end of the tenth four-operational amplifier UA14 by the 38 resistance R 38, and the inverting input of the tenth four-operational amplifier UA14 is connected the output terminal of self by the 39 resistance R 39 with the parallel circuit of the 16 capacitor C16, simultaneously also by the 40 resistance R 40 ground connection, its output terminal connects the secondary signal input end IN2 of MUX U4, a stationary contact that simultaneously also connects the 7th selector switch K7, the moving contact of the 7th selector switch K7 connects the in-phase input end of the 15 operational amplifier UA15, and the moving contact of the 7th selector switch K7 also selects one of them stationary contact to connect under the control of main control unit 1, and the inverting input of the 15 operational amplifier UA15 is connected the output terminal of self by the 41 resistance R 41 with the parallel circuit of the 17 capacitor C17, simultaneously also by the 42 resistance R 42 ground connection, its output terminal connects the first signal output terminal IN1 of MUX U4.
The 5th above-mentioned selector switch K5, the 6th selector switch K6, the 7th selector switch K7, the 8th selector switch K8 all connect at order moving contact and one of them stationary contact of the control of main control unit 1.
In addition, MUX U4 is also subject to the control of main control unit 1, an input end conducting in four signal input parts of gating.And the signal output part of MUX U4 output is amplified signal CS4 after processing and is carried out A/D conversion to high-precision A/D change-over circuit of next stage.
(3) power supply unit
Power supply unit is for power supply, and it connects respectively main control unit 1, signal processing unit 3, and wireless networking communication unit 4.
(4) GPS time service unit
GPS time service unit is controlled and then is controlled main control unit 1 timing energization and moves by outer remote, described GPS time service unit is located between power supply unit and main control unit 1.GPS time service unit in the present embodiment adopts in prior art the GPS module with the UBLOXNEO6M model of built-in ceramic antenna.
The principle of work of the present embodiment is: when seismic event sensor 2 collects simulating signal, first sending this simulating signal to signal processing unit 3 processes, the process of processing is the first shielded signal end V+ to be connected to the shell of seismic event collector, secondary shielding signal end V-ground connection, then the first moving contact of the first linked switch K1 is connected to the first stationary contact, the second moving contact is connected the 3rd stationary contact, and the first moving contact of the second linked switch K2 is connected the first stationary contact, the second moving contact is connected the 3rd stationary contact, the Simulating Seismic Wave signal collecting by reverse spike holding circuit after, through operational amplification circuit, amplify, simulating signal CS1 after amplification passes to filtering circuit 312, pass through successively notch filter circuit, low-pass filter circuit, circuit of high pass filter carries out removal of impurities, simulating signal CS2 after removal of impurities is more successively through cushioning input buffer circuit and the time delay buffer circuits of delay circuit 313, the comparatively pure simulating signal CS3 of final output.
Described simulating signal CS3 is the simulating signal that degree of purity is higher, this simulating signal inputs in floating-point amplifier module 32 afterwards, in floating-point amplifier module 32, simulating signal CS3 can input to main control unit 1 by PC0 pin through following processing: simulating signal CS3, main control unit 1 can carry out A/D conversion to this simulating signal, due to the present embodiment employing is the main control unit 1 of seismic event collector self, therefore, this main control unit 1 tool has plenty of 12 A/D conversions, signal after conversion becomes digital signal, in this signal and main control unit 1, the reference value of storage is compared, simultaneously owing to being provided with three-stage amplifier in the present embodiment, therefore four reference values have been stored main control unit 1 is interior, first signal value after A/D conversion is compared with the maximum reference value existing, if the signal value after conversion is not less than the maximum reference value of storage, this simulating signal is without amplification, directly can export to high-precision A/D change-over circuit, therefore, the 6th control pin PC6 of main control unit 1 sends control signal, make the 8th selector switch K8 connect the 12 operational amplifier UA12, make simulating signal CS3 directly export to MUX U4 by the 12 operational amplifier UA12, the first control pin PC1 of main control unit 1 and the second control pin PC2 control U4 gating of MUX the 4th signal input part IN4 simultaneously, finally there is the signal output part OUT output signal CS4 of MUX U4 to follow-up high-precision A/D change-over circuit.
If the signal value after conversion is less than the maximum reference value of storage, second largest reference value of this signal value and storage is compared, if this signal value is not less than second largest reference value of storage, this simulating signal only need be carried out one-level and be amplified, therefore, the 6th control pin PC6 of main control unit 1, the 5th control pin PC5, the 4th control pin PC4, the 3rd control pin PC3 sends respectively control signal, make the 8th selector switch K8 connect the 5th selector switch K5, and control the 5th selector switch K5, connect the 13 operational amplifier UA13, the 6th selector switch K6 disconnects the tenth four-operational amplifier UA14, after making simulating signal CS3 amplify by the one-level of the 13 operational amplifier UA13, directly export to MUX U4, the first control pin PC1 of main control unit 1 and the second control pin PC2 control U4 gating of MUX the 3rd signal input part IN3 simultaneously, finally there is the signal output part OUT output signal CS4 of MUX U4 to follow-up high-precision A/D change-over circuit.
If the signal value after conversion is less than second largest reference value of storage, the third-largest reference value of this signal value and storage is compared, if this signal value is not less than the third-largest reference value of storage, this simulating signal only need be carried out two-stage and be amplified, therefore, the 6th control pin PC6 of main control unit 1, the 5th control pin PC5, the 4th control pin PC4, the 3rd control pin PC3 sends respectively control signal, make the 8th selector switch K8 connect the 5th selector switch K5, and control the 5th selector switch K5, connect the 13 operational amplifier UA13, the 6th selector switch K6 connects the tenth four-operational amplifier UA14, and the 7th selector switch K7 disconnects the 15 operational amplifier UA15, after making simulating signal CS3 amplify by the one-level of the 13 operational amplifier UA13, secondary through the tenth four-operational amplifier UA14 amplifies again, just export to MUX U4, the first control pin PC1 of main control unit 1 and the second control pin PC2 control U4 gating secondary signal input end IN2 of MUX simultaneously, finally there is the signal output part OUT output signal CS4 of MUX U4 to follow-up high-precision A/D change-over circuit.
If the signal value after conversion is less than the third-largest reference value of storage, the minimum reference value of this signal value and storage is compared, if this signal value is not less than second largest reference value of storage, this simulating signal need to be carried out three grades of amplifications, therefore, the 6th control pin PC6 of main control unit 1, the 5th control pin PC5, the 4th control pin PC4, the 3rd control pin PC3 sends respectively control signal, make the 8th selector switch K8 connect the 5th selector switch K5, and control the 5th selector switch K5, connect the 13 operational amplifier UA13, the 6th selector switch K6 connects the tenth four-operational amplifier UA14, the 7th selector switch K7 connects the 15 operational amplifier UA15 simultaneously, make simulating signal CS3 by the one-level of the 13 operational amplifier UA13, amplify successively, the secondary of the tenth four-operational amplifier UA14 amplifies, and after three grades of amplifications of the 15 operational amplifier UA15, export to MUX U4, the first control pin PC1 of main control unit 1 and the second control pin PC2 control U4 gating first signal input end IN1 of MUX simultaneously, finally there is the signal output part OUT output signal CS4 of MUX U4 to follow-up high-precision A/D change-over circuit.
In addition, the present embodiment needed whole data acquisition channel to carry out smoothness detection before to analog signal processing, first, the sinusoidal signal that main control unit 1 produces a fixed frequency and amplitude is delivered to the TSET+ of pre-amplification circuit 311 as self-test signal, the first moving contact of the first linked switch K1 is connected to the second stationary contact, the second moving contact is connected the 4th stationary contact, and the first moving contact of the second linked switch K2 is connected the second stationary contact, the second moving contact is connected the 4th stationary contact, now self-test signal can pass through filtration module 31 successively, floating-point amplifier module 32, A/D modular converter 33, finally get back to main control unit 1, main control unit 1 is by the signal of receiving and the self-test signal contrast of sending, as identical, illustrate that Data Detection passage is clear and coherent, can process the seismic event gathering, otherwise, can not be used for locality seismic wave.
Claims (8)
1. a high precision wireless MANET earthquake-capturing device,
it is characterized in thatit comprises:
As the main control unit of control center, described main control unit is connected with external wireless communication equipment by coupled wireless networking communication unit;
Be used for the locality seismic event sensor of seismic wave data message, the signal output part of described seismic event sensor is by connecting main control unit for seismic event simulating signal being carried out to the signal processing unit of filter amplifying processing;
For the power supply unit of powering, described power supply unit connects respectively main control unit, signal processing unit, and wireless networking communication unit.
2. high precision wireless MANET earthquake-capturing device according to claim 1,
it is characterized in that: it also comprises the GPS time service unit of being controlled and then controlled main control unit energising operation by outer remote, and described GPS time service unit is located between power supply unit and main control unit.
3. high precision wireless MANET earthquake-capturing device according to claim 1 and 2,
it is characterized in that:
Described signal processing unit comprises the filtration module for the simulating signal gathering is carried out to filtering processing,
The signal output part of described filtration module connects the signal input part of the floating-point amplifier module for simulating signal is amplified,
The signal output part of described floating-point amplifier module is by connecting main control unit for simulating signal being converted to the A/D modular converter of digital signal.
4. high precision wireless MANET earthquake-capturing device according to claim 3,
it is characterized in that:
Described filtration module comprises the pre-amplification circuit of processing for simulating signal is amplified,
The signal input part of described pre-amplification circuit connects seismic event sensor, and its signal output part connects for simulating signal being carried out to the signal input part of the filtering circuit of removal of impurities,
The signal output part of described filtering circuit connects for simulating signal being carried out to the signal input part of the buffering delay circuit of buffered;
Described floating-point amplifier module comprises for simulating signal being carried out to amplitude judgement, and can selecting the amplitude anticipation circuit of multiple that simulating signal is amplified; The signal input part of described amplitude anticipation circuit receives the simulating signal of buffering time delay road output, and signal output part control linkage can change the floating-point amplifier circuit of enlargement factor; The input end of described floating-point amplifier circuit receives the simulating signal of buffering delay circuit output, and signal output part connects follow-up high-precision A/D change-over circuit.
5. high precision wireless MANET earthquake-capturing device according to claim 4,
it is characterized in that:
Described pre-amplification circuit comprises the reverse spike voltage holding circuit for the protection of reverse spike voltage,
The signal input part of described reverse spike voltage holding circuit connects seismic event sensor, and its signal output part connects the amplifying circuit for simulating signal is amplified;
Described filtering circuit comprises the notch filter circuit that the signal after pre-amplification circuit is amplified carries out further removal of impurities; The signal input part of described notch filter circuit connects the signal output part of amplifying circuit, and its signal output part connects for simulating signal being carried out to the signal input part of the low-pass filter circuit of low-pass filtering; The signal output part of described low-pass filter circuit connects for simulating signal being carried out to the signal input part of the circuit of high pass filter of high-pass filtering;
Described buffering delay circuit comprises for simulating signal being carried out to the input buffer circuit of buffered; The signal input part of described input buffer circuit connects the signal output part of circuit of high pass filter, and its signal output part connects for simulating signal being carried out to the signal input part of the time delay input buffer circuit of delay process.
6. high precision wireless MANET earthquake-capturing device according to claim 5,
it is characterized in that: described pre-amplification circuit is also provided with two for data acquisition channel being carried out to the clear and coherent self-test signal input end detecting, the positive pole of described self-test signal input end is connected with the main control unit of seismic event collector when carrying out self check, and negative pole is ground connection when carrying out self check; Between reverse spike voltage holding circuit and amplifying circuit, be provided with the selected on-off circuit that one of gating detection signal or self-test signal are inputted.
7. according to the high precision wireless MANET earthquake-capturing device described in claim 5 or 6,
it is characterized in that: the signal input part of described amplitude anticipation circuit connects the signal output part of buffering delay circuit, comprises the main control unit as control center, is provided with A/D translation function, and is provided with the reference value of at least two digital signals in described main control unit;
Described floating-point amplifier circuit comprise signal is not done amplify to change without amplifying circuit, and the amplifying circuit that at least one-level is amplified signal; The described signal input part without amplifying circuit and amplifying circuit is under the control of amplitude anticipation circuit, select the simulating signal of a reception seismic event device acquisition buffer delay circuit output, the described signal output part without amplifying circuit and amplifying circuit is connected under the control of amplitude anticipation circuit, to carry out the signal input part of the MUX of gating output without amplifying circuit and amplifying circuit; The signal output part of MUX connects follow-up high-precision A/D change-over circuit.
8. high precision wireless MANET earthquake-capturing device according to claim 7,
it is characterized in that: the main control unit of described amplitude anticipation circuit is the main control unit in earthquake-capturing device;
Described amplifying circuit comprises one-level amplifying circuit, second amplifying circuit, three-stage amplifier,
The signal input part of described one-level amplifying circuit receives the simulating signal of buffering delay circuit output under the control of amplitude anticipation circuit, and signal output part connects in second amplifying circuit or MUX under the control of floating-point anticipation circuit,
The signal output part of described second amplifying circuit connects in three-stage amplifier or MUX under the control of floating-point anticipation simulation,
The signal output part of described three-stage amplifier connects MUX.
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| CN106251586A (en) * | 2016-08-09 | 2016-12-21 | 西安科技大学 | Geological Disaster Warning System based on radio communication |
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| CN103605155B (en) | 2016-04-06 |
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