CN204359950U - Aviation electromagnetic data acquisition instrument - Google Patents
Aviation electromagnetic data acquisition instrument Download PDFInfo
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- CN204359950U CN204359950U CN201520037074.2U CN201520037074U CN204359950U CN 204359950 U CN204359950 U CN 204359950U CN 201520037074 U CN201520037074 U CN 201520037074U CN 204359950 U CN204359950 U CN 204359950U
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- acquisition instrument
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Abstract
The utility model provides a kind of aviation electromagnetic data acquisition instrument, comprises the signal pre-processing module of connecting signal source, connects the data temporary storage module of described Signal Pretreatment unit, the FPGA unit with data temporary storage model calling, the central processing unit be connected with FPGA unit and connects the power module of described FPGA unit and central processing unit simultaneously.The utility model aviation electromagnetic data acquisition instrument bulking value obviously reduces, and has floating-point amplifier function, can realize Long-distance Control simultaneously, not need manual site to operate, improve efficiency, reduces human input.
Description
Technical field
The utility model relates to geologic prospecting mapping fields of measurement, is specifically related to a kind of aviation electromagnetic data acquisition instrument of wide dynamic range.
Background technology
Time-domain AEM reconnoitres equipment, is the geophysical equipment of Mineral Resource Survey, hydrological environment field urgent need.Fixed-wing Time-domain AEM system has significant advantage in zonule, large scale geologic prospecting work, and possesses the feature such as safely and fast, in geophysical equipment field, occupy critical role.
Medium-sized fixed wing aircraft realizes time domain aviation electromagnetic investigation system, original frequency field aviation electromagnetic technology based on fixed-wing is mostly all no longer applicable, the Chief technology of whole system all needs again to develop instrument and equipment for fixed wing aircraft platform or improve, and wherein just comprises aviation electromagnetic data acquisition and includes instrument.Data acquisition is included instrument and is played a part to gather in whole fixed-wing time domain aviation electromagnetic system, includes, stores data, and transmitting, reception and other utility appliance are carried out clock synchronous, contact becomes unified entirety, be control and the data center of whole system, occupy an important position.
Therefore, necessaryly a kind of new aviation electromagnetic data acquisition instrument is provided to solve above-mentioned technical matters.
Summary of the invention
The technical matters that the utility model solves is to provide a kind of aviation electromagnetic data acquisition instrument, and it can meet the demand that time domain aviation electromagnetic is reconnoitred, and its structure is simply frivolous, and can realize remote data transmission.
For solving the problems of the technologies described above, the utility model adopts following technical scheme: a kind of aviation electromagnetic data acquisition instrument, comprises the signal pre-processing module of connecting signal source, connects the data temporary storage module of described Signal Pretreatment unit, the FPGA unit with data temporary storage model calling, the central processing unit be connected with FPGA unit and connects the power module of described FPGA unit and central processing unit simultaneously.
As the further improvement of the technical program, described signal pre-processing module comprises gain unit and Date Conversion Unit, establishes gain amplifier and operational amplifier in described gain unit, and described operational amplifier is connected with an instrument amplifier.
As the further improvement of the technical program, described instrument amplifier is connected to a gain-programmed amplifier, and this gain-programmed amplifier is connected with an analog to digital converter further; Described Date Conversion Unit is analog to digital converter, described signal source after described gain amplifier and analog to digital converter, the large process of prevention of settling signal.
As the further improvement of the technical program, described central processing unit is connection control network transmission module and document management module respectively; Described network transmission module based on ICP/IP protocol, and is connected with a RJ45 interface; Described document management module is connected with an easily extensible data storage cell.
As the further improvement of the technical program, described central processing unit is connected with a remote transport interface, and described remote transport interface is RS232 or RS244 port.
As the further improvement of the technical program, be provided with clock and power supply in described power module, described clock comprises FPGA clock, ARM clock, and described power supply comprises ADC power supply, PGA power supply and amplifier power supply.
The utility model aviation electromagnetic data acquisition instrument bulking value obviously reduces, and has floating-point amplifier function, can realize Long-distance Control simultaneously, not need manual site to operate, improve efficiency, reduces human input.
Accompanying drawing explanation
Fig. 1 is the syndeton schematic diagram of aviation electromagnetic data acquisition instrument of the present invention;
Fig. 2 is that aviation electromagnetic data acquisition instrument programme-controlled gain of the present invention regulates electric theory diagram.
Embodiment
Refer to shown in Fig. 1 and Fig. 2, the utility model provides a kind of aviation electromagnetic data acquisition instrument, comprise the signal pre-processing module of connecting signal source, connect the data temporary storage module of described Signal Pretreatment unit, with the FPGA(Field-Programmable Gate Array of data temporary storage model calling, field programmable gate array) unit, the central processing unit be connected with FPGA unit and connect the power module of described FPGA unit and central processing unit simultaneously.In addition, described central processing unit connection control network transmission module and document management module respectively.
Described signal source is simulation signal generator, and it includes X, Y, Z three component signal and transmitter current waveform signal.Described signal pre-processing module comprises gain unit and Date Conversion Unit, wherein, gain amplifier and operational amplifier is established in described gain unit, in the utility model preferred forms, AD623 fixed gain amplifier and OPA627 operational amplifier can be adopted, and described OPA627 operational amplifier is connected with an AD620 instrument amplifier, AD623 fixed gain amplifier is used for both-end differential signal to be converted to single-ended signal, the signal simultaneously having carried out 40DB amplifies, described AD620 instrument amplifier is then connected to a PGA281 gain-programmed amplifier, this PGA281 gain-programmed amplifier is connected with AK5394 analog to digital converter further.In addition, described Date Conversion Unit is analog to digital converter, and it is for converting simulating signal to digital signal, described signal source after described gain amplifier and analog to digital converter, the large process of prevention of settling signal.
Described power module is used for powering to described FPGA unit and central processing unit, clock and power supply is provided with in it, such as, FPGA clock, ARM clock, ADC (Analog-to-digital converter, analog to digital converter) power supply, PGA (Programmable Gain Amplifier, programmable gain amplifier) power supply and amplifier power supply etc.Described FPGA unit for realizing gain-adjusted, data bits conversion and the function of data buffering, described central processing unit then for realizing the transmitting-receiving of remote measuring and controlling instruction, alignment of data stores and the function such as transmission.Described network transmission module is connected with described central processing unit, and data transfer out by the control being subject to central processing unit, in the present embodiment, described network transmission module is based on ICP/IP protocol, and be connected directly to networking output interface, the preferred RJ45 interface of described networking output interface.Data, for receiving the instruction notification of central processing unit, are stored in easily extensible data storage cell by described document management module, such as, and SD storage card and USB flash memory etc.
It is worth mentioning that, in the utility model preferred forms, described central processing unit also discharges sampled data bag by remote transport interface, or receive the control command (such as from the steering order of bottom surface) transmitted from this transmission interface, and described remote transport interface be RS232 RS244 port, remote measuring and controlling function can be realized.
Refer to shown in Fig. 2, it is the utility model applicable cases in a particular embodiment, discloses programme-controlled gain and regulates electric theory diagram, describes in detail below its principle of work and process ginseng.
When after apparatus installation to fixed wing aircraft platform, after connecting aviation electromagnetic transmitter and the power cable of including between instrument and synchronous cable, work can be included by Develop Data.After aviation electromagnetic data acquisition instrument starts to power on, instrument and equipment starts self-inspection, and what first carry out is the measurement of supply voltage and source current, and after this measured value meets OK range, the oneself carrying out programme-controlled gain unit immediately resets and calibration.Input threshold values relay inhale and, disconnect the connection of OPA627 operational amplifier and input signal, this point voltage be directly switched to zero potential.After waiting for the time of 100mS, AK5394 analog to digital converter starts the calibration carrying out passage, and after waiting to be calibrated completing, relay discharges into process of measurement.
In the present embodiment, the workflow of described aviation electromagnetic data acquisition instrument mainly contain following some:
1) simulating signal enters AD623 fixed gain amplifier and both-end differential signal is converted to single-ended signal, and the signal simultaneously having carried out 40DB amplifies, and this signal enters ADS7883 analog to digital converter to start to quantize, and completes pre-amplification process.
2) digital quantity after quantification is transferred to FPGA unit by SPI protocol by ADS7883 analog to digital converter, suitable enlargement factor is found out after calculating, this binary value exports to PGA281 gain-programmed amplifier, carries out voltage gain adjustment, completes pre-sampling process.
3) after suitable Time Created, PGA281 gain-programmed amplifier exports the voltage signal being applicable to FPGA indicating range, if this voltage signal exceeds the range ability of AK5394 analog to digital converter, then only export maximal value, and ER(Error is provided) rub-out signal to FPGA unit, reassign the enlargement factor of programme-controlled gain; If this signal does not exceed the range ability of AK5394 analog to digital converter, FPGA unit starts to provide AK4394 analog to digital converter conversion timing sequence, opens the quantification of analog to digital, completes gain adjustment process.
4) after ADC (Analog-to-digital converter, analog to digital converter) clock, AK5394 analog to digital converter completes quantizing process, and this value outputs to FPGA unit by I2S bus, and transmission converts signal.This translation data, enlargement factor and channel position are compiled into 32 bit binary data codes by FPGA unit in the lump, are transferred to central processing unit (preferred ARM chip) by 8086 bus protocols, complete range instruction and ADC sampling process.
5) after central processing unit (preferred ARM chip) receives these data, first carry out parity checking, after this verification is incorrect, again apply for FPGA unit retransmission data, till data parity check is correct.After receiving correct data, central processing unit (preferred ARM chip) notifies FAT32 file system and ICP/IP protocol unit, by these data write SD card or USB flash memory, and export this data by RJ45 interface, complete storage and the transmitting procedure of data.
6) central processing unit (preferred ARM chip) timing property these sample quantization data of biography down to RS232 RS244 port, and receive the control command uploaded from this port, if above process makes a mistake, output error code identification number and quitting work, wait for the arrival of ground control command, complete remote measuring and controlling process.
The utility model obviates traditional X86 industrial control computer scheme, have employed arm processor and fpga logic unit as the core cell of this instrument, more optimizes the weight of instrument, volume; And there is the data ALT-CH alternate channel of gain controllable, by carrying out pre-sampling to analog quantity, regulating the enlargement factor of PGA programme-controlled gain, signal being inputted 24 ADC analog converters, and then realize the floating-point amplifier function to data.And, if after breaking down, long-rangely can carry out remote reset by RS422 port, restart this equipment.Meanwhile, can ensure to carry out high resolving power, high-speed data acquisition to X, Y, Z three-component and transmitter current four-way, enough data volumes can be obtained and data precision carries out analysis interpretation.Carry out airborne electromagnetic survey for fixed wing aircraft and no longer need operator in the air, all data are directly sent to land station by wireless device, and ground staff's real-time monitor device state, has saved manpower greatly, improve safety.
The above; it is only most preferred embodiment of the present utility model; not any pro forma restriction is done to the utility model; any those of ordinary skill in the art; do not departing under technical solutions of the utility model ambit; utilize the method content of above-mentioned announcement to make many possible variations and modification to technical solutions of the utility model, all belong to the scope of claims protection.
Claims (6)
1. an aviation electromagnetic data acquisition instrument, is characterized in that: comprise the signal pre-processing module of connecting signal source, connect the data temporary storage module of described Signal Pretreatment unit, the FPGA unit with data temporary storage model calling, the central processing unit be connected with FPGA unit and connect the power module of described FPGA unit and central processing unit simultaneously.
2. aviation electromagnetic data acquisition instrument according to claim 1, it is characterized in that: described signal pre-processing module comprises gain unit and Date Conversion Unit, establish gain amplifier and operational amplifier in described gain unit, and described operational amplifier is connected with an instrument amplifier.
3. aviation electromagnetic data acquisition instrument according to claim 2, it is characterized in that: described instrument amplifier is connected to a gain-programmed amplifier, this gain-programmed amplifier is connected with an analog to digital converter further; Described Date Conversion Unit is analog to digital converter, described signal source after described gain amplifier and analog to digital converter, the large process of prevention of settling signal.
4. aviation electromagnetic data acquisition instrument according to claim 3, is characterized in that: described central processing unit is connection control network transmission module and document management module respectively; Described network transmission module based on ICP/IP protocol, and is connected with a RJ45 interface; Described document management module is connected with an easily extensible data storage cell.
5. aviation electromagnetic data acquisition instrument according to claim 4, is characterized in that: described central processing unit is connected with a remote transport interface, and described remote transport interface is RS232 or RS244 port.
6. the aviation electromagnetic data acquisition instrument according to any one in claim 1 to 5, it is characterized in that: in described power module, be provided with clock and power supply, described clock comprises FPGA clock, ARM clock, and described power supply comprises ADC power supply, PGA power supply and amplifier power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520037074.2U CN204359950U (en) | 2015-01-20 | 2015-01-20 | Aviation electromagnetic data acquisition instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520037074.2U CN204359950U (en) | 2015-01-20 | 2015-01-20 | Aviation electromagnetic data acquisition instrument |
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| Publication Number | Publication Date |
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| CN204359950U true CN204359950U (en) | 2015-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520037074.2U Expired - Fee Related CN204359950U (en) | 2015-01-20 | 2015-01-20 | Aviation electromagnetic data acquisition instrument |
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| CN (1) | CN204359950U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107894620A (en) * | 2017-11-02 | 2018-04-10 | 中国科学院电子学研究所 | A kind of air code mixes field source electromagnetic survey system |
-
2015
- 2015-01-20 CN CN201520037074.2U patent/CN204359950U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107894620A (en) * | 2017-11-02 | 2018-04-10 | 中国科学院电子学研究所 | A kind of air code mixes field source electromagnetic survey system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150527 Termination date: 20160120 |
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| EXPY | Termination of patent right or utility model |