CN107704210A - Mutually isolated acquisition and memory system between a kind of multichannel data - Google Patents
Mutually isolated acquisition and memory system between a kind of multichannel data Download PDFInfo
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- CN107704210A CN107704210A CN201711023705.5A CN201711023705A CN107704210A CN 107704210 A CN107704210 A CN 107704210A CN 201711023705 A CN201711023705 A CN 201711023705A CN 107704210 A CN107704210 A CN 107704210A
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- 238000002955 isolation Methods 0.000 claims abstract description 52
- 230000003750 conditioning effect Effects 0.000 claims abstract description 12
- 239000003990 capacitor Substances 0.000 claims description 39
- 230000003287 optical effect Effects 0.000 claims description 3
- 238000011084 recovery Methods 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 description 12
- 230000005540 biological transmission Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 208000025274 Lightning injury Diseases 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000005457 optimization Methods 0.000 description 4
- 230000002411 adverse Effects 0.000 description 3
- 238000013500 data storage Methods 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
- G06F3/062—Securing storage systems
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
- G06F3/0671—In-line storage system
- G06F3/0673—Single storage device
- G06F3/0679—Non-volatile semiconductor memory device, e.g. flash memory, one time programmable memory [OTP]
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- Engineering & Computer Science (AREA)
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- General Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- General Engineering & Computer Science (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention discloses acquisition and memory system mutually isolated between a kind of multichannel data, including signal isolation module, signal to follow conditioning module, analog-digital converter, fpga logic controller, RS422 decoder modules, optocoupler input module, RS422 receivers, RS422 transmitters, FLASH memory modules and USB interface；Wherein, signal isolation module, signal follow conditioning module, analog-digital converter, fpga logic controller to be linked in sequence successively, and RS422 decoder modules, optocoupler input module, RS422 receivers, RS422 transmitters, FLASH memory modules, USB interface are connected with fpga logic controller respectively.The present invention meets aircraft telemetry Large Copacity, the real-time storage of high-speed, ensures the reliable recovery of data.
Description
Technical Field
The invention relates to the technical field of aircraft telemetry, in particular to a collection and storage system with multiple paths of data isolated from each other.
Background
In the aerospace measurement and control system, the test of the remote measurement parameters has important significance for verifying the design parameters of the aircraft, judging faults in the test and the like. The tracking measurement, remote measurement and remote control system is an essential part of the whole measurement and control system. The electronic measurement and control system has the advantages of all-weather tracking of the spacecraft, better flexibility and enough precision. From the perspective of system engineering, the data obtained by spacecraft tracking measurement can give information of trajectory, orbit or position through calculation; the data provided by telemetering can give the state information of the spacecraft after being processed and analyzed; they are all important sources of information for the feedback loop in the system. The remote control is an actuator in the control system.
The ground part of the electronic measurement and control system must be matched with the electronic equipment installed on the spacecraft to complete the measurement and control task. For the measurement, the spacecraft must have corresponding beacons or transponders that transmit back radio frequency signals for ground tracking and speed measurement, and transponders that also transmit back ranging information. For telemetry, the spacecraft must have sensors to detect various parameters and a radio frequency transmitter to transmit these parameters. For remote control, the spacecraft must have an instruction receiver. Therefore, both on-board spacecraft and on-ground two-part electronics should be considered together in a unified manner in the design.
When the aircraft executes tasks, the sensors and the imaging device can generate a large amount of telemetering and image data, the data needs to be stored through a real-time storage system, and the requirement of aircraft data recovery is met. Compared with the wireless data return technology, the data real-time storage system has the advantages of good confidentiality, low error rate, large data bandwidth, low cost and the like, and is a key technology in the field of aircraft remote measurement.
With the development of the aircraft telemetry technology, the types of data to be collected and stored are increasingly increased, the data volume is increasingly large, the data storage rate is also improved, and higher requirements are provided for the aircraft data real-time storage technology. In the traditional data real-time storage system, data are directly transmitted to a data storage device through a parallel bus, data synchronization is not carried out on a data line and the data line, and the error rate of stored data is also increased sharply along with the gradual increase of storage capacity, so that the requirement provided by an aircraft telemetry system cannot be met. And signals received by the storage system may interfere with each other, the transmission quality is affected by the interference caused by common ground of digital and analog, when a transmission fault occurs to a certain path of signal, other circuits of hardware may be adversely affected, and the performance of the storage system is not stable and reliable.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and provides an acquisition and storage system with isolated multi-channel data.
The invention adopts the following technical scheme for solving the technical problems:
the invention provides an acquisition and storage system with multi-channel data isolated from each other, which comprises a signal isolation module, a signal following conditioning module, an analog-to-digital converter, an FPGA (field programmable gate array) logic controller, an RS422 decoding module, an optical coupler input module, an RS422 receiver, an RS422 transmitter, an FLASH storage module and a USB (universal serial bus) interface; the system comprises a signal isolation module, a signal following and conditioning module, an analog-to-digital converter and an FPGA (field programmable gate array) logic controller, wherein the signal isolation module, the signal following and conditioning module, the analog-to-digital converter and the FPGA logic controller are sequentially connected, and an RS422 decoding module, an optocoupler input module, an RS422 receiver, an RS422 transmitter, an FLASH storage module and a USB interface are respectively connected with the FPGA logic controller; wherein,
the signal isolation module comprises a lightning strike resistant circuit, a hysteresis comparison circuit and an isolation circuit which are sequentially connected in sequence, wherein the isolation circuit comprises an ISO122P isolation chip and a first capacitor to a fourth capacitor, the 1 st pin of the ISO122P isolation chip is connected with one end of the first capacitor, the other end of the first capacitor is connected with the 16 th pin of the ISO122P isolation chip, the 2 nd pin of the ISO122P isolation chip is connected with one end of the second capacitor, the other end of the second capacitor is connected with the 16 th pin of the ISO122P isolation chip, the 9 th pin of the ISO122P isolation chip is connected with one end of the third capacitor, the other end of the third capacitor is connected with the 8 th pin of the ISO122P isolation chip, the 10 th pin of the ISO122P isolation chip is connected with one end of the fourth capacitor, and the other end of the fourth capacitor is connected with the 8 th pin of the ISO122P isolation chip.
As a further optimization scheme of the acquisition and storage system with the multi-channel data isolated from each other, the anti-lightning circuit comprises a first resistor, a second resistor, a third resistor, a capacitor, a first diode and a second diode, one end of the first resistor is connected with one end of the second resistor, the other end of the second resistor is connected with the ground, one end of the third resistor, one end of the capacitor, the anode of the first diode and the cathode of the second diode respectively, and the other end of the first resistor is connected with the other end of the third resistor, the other end of the capacitor, the cathode of the first diode and the anode of the second diode respectively.
As a further optimization scheme of the acquisition and storage system with the multi-channel data isolated from each other, the FLASH storage module is a FLASH array.
As a further optimization scheme of the acquisition and storage system with the multi-path data isolated from each other, the FLASH array comprises a plurality of FLASH chips.
As a further optimization scheme of the acquisition and storage system with the multi-channel data isolated from each other, the model of the analog-to-digital converter is ADS 8365.
Compared with the prior art, the invention adopting the technical scheme has the following technical effects:
(1) the invention adopts a signal full-isolation technology to avoid the interference caused by common grounding of digital and analog from influencing the transmission quality, so as to ensure that the signals are not influenced mutually, and simultaneously avoid the adverse influence on other circuits of hardware when a certain path of signal has transmission fault;
(2) the anti-lightning design is adopted, so that the lightning stroke signal of the kilovolt can be protected, and the overvoltage sensor signal cannot damage a circuit;
(3) the invention satisfies the real-time storage of the high-capacity and high-speed telemetering data of the aircraft, ensures the reliable recovery of the data, provides the functions of lightning stroke resistance, noise interference elimination, isolation and the like, and greatly improves the safety of an engine control system.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
Detailed Description
The technical scheme of the invention is further explained in detail by combining the attached drawings:
as shown in fig. 1, an acquisition and storage system with multiple paths of data isolated from each other is characterized by comprising a signal isolation module, a signal following and conditioning module, an analog-to-digital converter, an FPGA logic controller, an RS422 decoding module, an opto-coupler input module, an RS422 receiver, an RS422 transmitter, a FLASH storage module and a USB interface; the system comprises a signal isolation module, a signal following and conditioning module, an analog-to-digital converter and an FPGA (field programmable gate array) logic controller, wherein the signal isolation module, the signal following and conditioning module, the analog-to-digital converter and the FPGA logic controller are sequentially connected, and an RS422 decoding module, an optocoupler input module, an RS422 receiver, an RS422 transmitter, an FLASH storage module and a USB interface are respectively connected with the FPGA logic controller; wherein,
the signal isolation module comprises a lightning strike resistant circuit, a hysteresis comparison circuit and an isolation circuit which are sequentially connected in sequence, wherein the isolation circuit comprises an ISO122P isolation chip and a first capacitor to a fourth capacitor, the 1 st pin of the ISO122P isolation chip is connected with one end of the first capacitor, the other end of the first capacitor is connected with the 16 th pin of the ISO122P isolation chip, the 2 nd pin of the ISO122P isolation chip is connected with one end of the second capacitor, the other end of the second capacitor is connected with the 16 th pin of the ISO122P isolation chip, the 9 th pin of the ISO122P isolation chip is connected with one end of the third capacitor, the other end of the third capacitor is connected with the 8 th pin of the ISO122P isolation chip, the 10 th pin of the ISO122P isolation chip is connected with one end of the fourth capacitor, and the other end of the fourth capacitor is connected with the 8 th pin of the ISO122P isolation chip.
And the RS422 receiver is used for outputting the received command to the FPGA logic controller for analysis, and when the record starting command is received, the RS422 decoding module starts to receive the PCM code stream until the storage system is powered off. When the takeoff signal received by the optical coupling input module is effective, the signal isolation module starts to collect and stores the multipath input analog quantity to the FLASH storage module after passing through the signal following conditioning module, the analog-to-digital converter and the FPGA logic controller. The multi-path analog quantity is isolated from each other, and the analog quantity and the PCM code stream are also isolated from each other. After the recording is finished, the FPGA logic controller transmits the received data to ground monitoring equipment through an RS422 transmitter for post analysis; the data stored in the FLASH storage module can be transmitted through the USB interface.
The anti-lightning circuit comprises first to third resistors, a capacitor, a first diode and a second diode, one end of the first resistor is connected with one end of the second resistor, the other end of the second resistor is connected with the ground, one end of the third resistor, one end of the capacitor, the anode of the first diode and the cathode of the second diode respectively, and the other end of the first resistor is connected with the other end of the third resistor, the other end of the capacitor, the cathode of the first diode and the anode of the second diode respectively.
The FLASH storage module is a FLASH array; the FLASH array includes a plurality of FLASH chips. The analog-to-digital converter is model ADS 8365.
The invention adopts a signal full-isolation technology to avoid the interference caused by common grounding of digital and analog from influencing the transmission quality, so as to ensure that the signals are not influenced mutually, and simultaneously avoid the adverse influence on other circuits of hardware when a certain path of signal has transmission fault; the anti-lightning design is adopted, so that the lightning stroke signal of the kilovolt can be protected, and the overvoltage sensor signal cannot damage a circuit; the invention satisfies the real-time storage of the high-capacity and high-speed telemetering data of the aircraft, ensures the reliable recovery of the data, provides the functions of lightning stroke resistance, noise interference elimination, isolation and the like, and greatly improves the safety of an engine control system.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all should be considered as belonging to the protection scope of the invention.
Claims (5)
1. A collection storage system with multi-channel data isolated from each other is characterized by comprising a signal isolation module, a signal following conditioning module, an analog-to-digital converter, an FPGA (field programmable gate array) logic controller, an RS422 decoding module, an optical coupler input module, an RS422 receiver, an RS422 transmitter, an FLASH storage module and a USB (universal serial bus) interface; the system comprises a signal isolation module, a signal following and conditioning module, an analog-to-digital converter and an FPGA (field programmable gate array) logic controller, wherein the signal isolation module, the signal following and conditioning module, the analog-to-digital converter and the FPGA logic controller are sequentially connected, and an RS422 decoding module, an optocoupler input module, an RS422 receiver, an RS422 transmitter, an FLASH storage module and a USB interface are respectively connected with the FPGA logic controller; wherein,
the signal isolation module comprises a lightning strike resistant circuit, a hysteresis comparison circuit and an isolation circuit which are sequentially connected in sequence, wherein the isolation circuit comprises an ISO122P isolation chip and a first capacitor to a fourth capacitor, the 1 st pin of the ISO122P isolation chip is connected with one end of the first capacitor, the other end of the first capacitor is connected with the 16 th pin of the ISO122P isolation chip, the 2 nd pin of the ISO122P isolation chip is connected with one end of the second capacitor, the other end of the second capacitor is connected with the 16 th pin of the ISO122P isolation chip, the 9 th pin of the ISO122P isolation chip is connected with one end of the third capacitor, the other end of the third capacitor is connected with the 8 th pin of the ISO122P isolation chip, the 10 th pin of the ISO122P isolation chip is connected with one end of the fourth capacitor, and the other end of the fourth capacitor is connected with the 8 th pin of the ISO122P isolation chip.
2. The system according to claim 1, wherein the anti-lightning circuit comprises first to third resistors, a capacitor, a first diode and a second diode, one end of the first resistor is connected to one end of the second resistor, the other end of the second resistor is connected to ground, one end of the third resistor, one end of the capacitor, the anode of the first diode and the cathode of the second diode, respectively, and the other end of the first resistor is connected to the other end of the third resistor, the other end of the capacitor, the cathode of the first diode and the anode of the second diode, respectively.
3. The mutually isolated acquisition and storage system for multi-channel data according to claim 1, wherein the FLASH memory module is a FLASH array.
4. The mutually isolated acquisition and storage system for multipath data of claim 3 wherein the FLASH array comprises a plurality of FLASH chips.
5. The system of claim 1, wherein the analog-to-digital converter is of the type ADS 8365.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711023705.5A CN107704210A (en) | 2017-10-27 | 2017-10-27 | Mutually isolated acquisition and memory system between a kind of multichannel data |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711023705.5A CN107704210A (en) | 2017-10-27 | 2017-10-27 | Mutually isolated acquisition and memory system between a kind of multichannel data |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107704210A true CN107704210A (en) | 2018-02-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711023705.5A Withdrawn CN107704210A (en) | 2017-10-27 | 2017-10-27 | Mutually isolated acquisition and memory system between a kind of multichannel data |
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| Country | Link |
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| CN (1) | CN107704210A (en) |
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2017
- 2017-10-27 CN CN201711023705.5A patent/CN107704210A/en not_active Withdrawn
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Application publication date: 20180216 |