CN207937846U - A kind of multichannel vibrational state parameter acquisition control sequential device - Google Patents
A kind of multichannel vibrational state parameter acquisition control sequential device Download PDFInfo
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- CN207937846U CN207937846U CN201721796265.2U CN201721796265U CN207937846U CN 207937846 U CN207937846 U CN 207937846U CN 201721796265 U CN201721796265 U CN 201721796265U CN 207937846 U CN207937846 U CN 207937846U
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Abstract
The utility model is a kind of multichannel vibrational state parameter acquisition control sequential device, including master controller, the input terminal of the master controller connects a sensor signal conversion module by analog-to-digital conversion module, the input terminal of the sensor signal conversion module connects multiple sensors, the input/output terminal of the master controller is connected with fifo cache modules, forms the data transmission chain of external multiple sensors signal and fifo cache modules.Utility model device picking rate when acquisition channel number is more, which has, to be obviously improved；Meanwhile double fifo buffers replace memory mechanism, keep acquisition and subsequent processing mutual indepedent, and the two speed is matched, data collision is effectively prevented, the efficiency of data transmission is improved；The data transmission chain single channel sampling rate of the present apparatus is per second to reach 2M, has high real-time, is acquired for high-intensity oscillation acceleration parameter, absolute error is within 1mV, and data are without error code.
Description
Technical field
The utility model belongs to sensor application technical field, and in particular to a kind of multichannel vibrational state parameter acquisition control
Timing unit.
Background technology
In high vibration dynamic changes of strength test process, need to acceleration, local compression situation, the series of parameters such as temperature
It is analyzed.During the test, a series of undesirable elements such as huge vibration and electromagnetic interference are usually associated with, many is caused
Electronic equipment is unable to operate normally.Therefore, being stored in for accurate data and high reliability how is obtained under severe conditions
Most important in test process, this High Reliable Data Collecting System with similar black box sub-feature is current strong vibration ring
One of the emphasis of development project is tested in border.
According to newest FPGA In-system programmable technologies, the multisensor dynamic data under strong vibration test environment is devised
Acquisition system meets the new demand of system reliability, real-time.
Closest prior art was sent out in 2016 by comrades such as Guizhou University original group Shengs with the utility model patent
Table in " liquid crystal with display " entitled " based on the design of STM32 dynamic monitoring systems " of the 7th 680-684 page of phase of volume 31 text
Chapter, technical solution are as shown in Figure 1：Including multiway analog switch 1, CPU module (STM32) 2, wireless module 3.In
Central processor 2 selects which channel signal acquired by multiway analog switch 1, and gathered data is then put into data register,
It is sent with wireless module 3.
Main problem is existing for the data acquisition and memory system：1, when multiway analog switch selector channel, other channels
It not disconnects, but concatenates a very big resistance to disconnect, this mode can make the precision of acquisition impaired.2, STM32 is
Work in series mode can just be again started up acquisition, this makes picking rate drop significantly after being stored in data register after acquisition
It is low.There are the hidden danger of data jamming when 3, so that picking rate is fast without buffer.
Utility model content
The purpose of the utility model is to overcome problems of the existing technology, obtain accurately number under severe conditions
According to the storage with high reliability, a kind of multichannel vibrational state parameter acquisition control sequential device is provided.
To realize above-mentioned technical purpose and the technique effect, the utility model is achieved through the following technical solutions：
A kind of multichannel vibrational state parameter acquisition control sequential device, including master controller, the input of the master controller
End connects a sensor signal conversion module, the input terminal connection of the sensor signal conversion module by analog-to-digital conversion module
The input/output terminal of multiple sensors, the master controller is connected with fifo cache modules, forms external multiple sensors letter
Number and fifo cache modules data transmission chain.
Further, the sensor signal conversion module includes constant-current source, the constant-current source and external a variety of sensings
Device is connected, and sensor output bipolar analog voltage signal is simultaneously sequentially connected filter module, pressure limiting module and differential conversion mould
Block, for the filtering of bipolar analog voltage signal to be converted to the stronger unipolarity differential signal of anti-interference ability, the difference
Conversion module connects filter, becomes muting unipolarity differential signal for that will include the unipolarity differential signal of noise,
The filter connects analog-to-digital conversion module.
Further, the analog-to-digital conversion module includes modulus conversion chip, and the modulus conversion chip is believed by difference
Number line connects filter, for being passed through unipolarity differential signal and converting thereof into data-signal, the modulus conversion chip
Reference edge is connect with reference power supply, and the modulus conversion chip is total by analog-to-digital conversion controlling bus and analog-digital conversion data respectively
Line connects master controller, is respectively used to receive the TTL control signals and to be transferred to master controller transformed that master controller is sent out
Data-signal.
Further, the master controller includes programmable logic device FPGA, and the programmable logic device FPGA is by dividing
Modulus conversion chip, the programmable logic device FPGA are not connected with analog-digital conversion data bus by analog-to-digital conversion controlling bus
Signal input part be connected with startup trigger module, transmit TTL enabling signals to programmable logic device FPGA for external, it is described
The signal input part of programmable logic device FPGA is connected with internal acceleration trigger module, for when acceleration reaches certain value
TTL enabling signals are transmitted to programmable logic device FPGA.
Further, the fifo cache modules include the first fifo buffers and the 2nd fifo buffers, for replacing
Storage, the first fifo buffers and the 2nd fifo buffers are separately connected the input/output terminal of master controller.
The utility model has the beneficial effects that:
The left end of utility model device connects with external multiple acceleration transducers, pressure sensor and infrared sensor
It connects, right end is connect with fifo cache modules, forms the data transmission chain of external multiple sensors signal and fifo cache modules；
The data transmission chain being made of the present apparatus, when acquisition channel number is more, picking rate, which has, is obviously improved；Meanwhile double fifo are slow
Storage replaces memory mechanism, keeps acquisition and subsequent processing mutual indepedent, and matches the two speed, effectively prevents data collision,
Improve the efficiency of data transmission；The data transmission chain single channel sampling rate of the present apparatus is per second to reach 2M, has high real-time
Property, it is acquired for high-intensity oscillation acceleration parameter, absolute error is within 1mV, and data are without error code.
Description of the drawings
Fig. 1 is to be based on STM32 dynamic monitoring system block diagrams in the prior art；
Fig. 2 is the overall structure schematic block diagram of the utility model；
Fig. 3 is the structural schematic block diagram of sensor signal conversion module in Fig. 2；
Fig. 4 is the structural schematic block diagram of analog-to-digital conversion module in Fig. 2；
Fig. 5 is the structural schematic block diagram of master controller in Fig. 2.
Specific implementation mode
Below with reference to the accompanying drawings and in conjunction with the embodiments, the utility model is described in detail.
Shown in referring to Fig.1, a kind of multichannel vibrational state parameter acquisition control sequential device, including master controller 8, the master
The input terminal of controller 8 connects a sensor signal conversion module 6, the sensor signal conversion by analog-to-digital conversion module 7
The input terminal of module 6 connects multiple sensors, and the input/output terminal of the master controller 8 is connected with fifo cache modules, is formed
The data transmission chain of external multiple sensors signal and fifo cache modules.
The sensor signal conversion module 6 includes constant-current source 13, the constant-current source 13 and external multiple sensors phase
Connection, sensor output bipolar analog voltage signal are simultaneously sequentially connected filter module 14, pressure limiting module 15 and differential conversion mould
Block 16, for the filtering of bipolar analog voltage signal to be converted to the stronger unipolarity differential signal of anti-interference ability, the difference
Divide conversion module 16 to connect filter 17, becomes muting unipolarity difference for that will include the unipolarity differential signal of noise
Signal, the filter 17 connect analog-to-digital conversion module 7, and in this embodiment, constant-current source 13 uses LM334 chips.
The analog-to-digital conversion module 7 includes modulus conversion chip 19, and the modulus conversion chip 19 passes through differential signal line
18 connection filters 17, for being passed through unipolarity differential signal and converting thereof into data-signal, the modulus conversion chip 19
Reference edge connect with reference power supply 20, the modulus conversion chip 19 passes through analog-to-digital conversion controlling bus 21 and modulus and turns respectively
It changes data/address bus 22 and connects master controller 8, be respectively used to receive the TTL control signals and be transferred to master control that master controller 8 is sent out
8 transformed data-signal of device processed, in the present embodiment, modulus conversion chip 19 use AD7266 chips, reference power supply 20 to adopt
With TL431 chips, specific electronic circuit is using this field or the conventional universal peripheral circuit connecting of AD7266 chips.
The master controller 8 includes programmable logic device FPGA23, and the programmable logic device FPGA23 by leading to respectively
It crosses analog-to-digital conversion controlling bus 21 and analog-digital conversion data bus 22 connects modulus conversion chip 19, the programmable logic device
The signal input part of FPGA23, which is connected with, starts trigger module 9, starts to programmable logic device FPGA23 transmission TTL for external
The signal input part of signal, the programmable logic device FPGA23 is connected with internal acceleration trigger module 10, for accelerating
When degree reaches certain value TTL enabling signals, in the present embodiment, programmable logic device are transmitted to programmable logic device FPGA23
FPGA23 uses EP4CE22 chips, and specific electronic circuit is using this field or the conventional universal peripheral circuit of EP4CE22 chips
Connection, internal acceleration trigger module 10 use ADXL001 chips, start trigger module 9 and corresponding isolation circuit can be used
And external start signal.
The fifo cache modules include the first fifo buffers 11 and the 2nd fifo buffers 12, for alternately storing,
The first fifo buffers 11 and the 2nd fifo buffers 12 are separately connected the input/output terminal of master controller 8.
The utility model principle
Multisensor in the utility model（Acceleration transducer, pressure sensor and infrared biography are used in the present embodiment
Sensor）Power supply, output -5V to+5V bipolar analog voltage signals are obtained from constant-current source 13, the removal of filtered module 14 passes
Noise during defeated avoids voltage is excessive from causing device failure, subsequently into differential conversion module using pressure limiting module 15
16, -5V to+5V bipolar analog voltage signals is converted to 0 and passes through filter to 5V unipolarity differential signals by differential conversion module 16
Wave module 14 enters modulus conversion chip 19；
External start signal sends TTL enabling signals by starting trigger module 9 to master controller 8, and internal acceleration touches
It sends out module 10 and sends TTL enabling signals to master controller 8 when acceleration reaches certain value, master controller 8 receives enabling signal
Afterwards, multiple sensor signals are acquired with I/O port output TTL signal control analog-to-digital conversion module 7, by SPI interface from analog-to-digital conversion mould
Block obtains 12 change datas；After single acquisition, frame head, postamble and check byte alternating is added in master controller in data
It is stored in the first fifo buffers 11 and the 2nd fifo buffers 12.
Furthermore, it is necessary to explanation, unless stated otherwise or is pointed out, the otherwise term in specification " first ", " the
The descriptions such as two " are used only for distinguishing various components, element, step etc. in specification, without being intended to indicate that various components, member
Logical relation or ordinal relation between element, step etc..
Those skilled in the art of the present technique are it is understood that the correlation module that is arrived involved in the utility model and its realization
Function is that computer software conventional in the prior art is carried on improved hardware and its device of composition, device or system
Program or related agreement achieve that, are improved to computer software programs in the prior art or related agreement.
For example, improved computer hardware system still can realize the hardware system by loading existing operation system of software
Specific function.It is understood, therefore, that the innovation of the utility model is to change hardware module in the prior art
Into and its connection syntagmatic, rather than be only changing for software or agreement to being carried in relation to function for realization in hardware module
Into.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (5)
1. a kind of multichannel vibrational state parameter acquisition control sequential device, including master controller（8）, which is characterized in that the master
Controller（8）Input terminal pass through analog-to-digital conversion module（7）Connect a sensor signal conversion module（6）, the sensor letter
Number conversion module（6）Input terminal connect multiple sensors, the master controller（8）Input/output terminal to be connected with fifo slow
Storing module forms the data transmission chain of external multiple sensors signal and fifo cache modules.
2. multichannel vibrational state parameter acquisition control sequential device according to claim 1, which is characterized in that the sensing
Device signal conversion module（6）Including constant-current source（13）, the constant-current source（13）It is connected with external multiple sensors, sensor
Output bipolar analog voltage signal is simultaneously sequentially connected filter module（14）, pressure limiting module（15）With differential conversion module（16）,
Unipolarity differential signal for the filtering of bipolar analog voltage signal to be converted to strong antijamming capability, the differential conversion mould
Block（16）Connect filter（17）, become muting unipolarity difference letter for that will include the unipolarity differential signal of noise
Number, the filter（17）Connect analog-to-digital conversion module（7）.
3. multichannel vibrational state parameter acquisition control sequential device according to claim 2, which is characterized in that the modulus
Conversion module（7）Including modulus conversion chip（19）, the modulus conversion chip（19）Pass through differential signal line（18）Connection filter
Wave device（17）, for being passed through unipolarity differential signal and converting thereof into data-signal, the modulus conversion chip（19）Ginseng
Examine end and reference power supply（20）Connection, the modulus conversion chip（19）Pass through analog-to-digital conversion controlling bus respectively（21）And modulus
Change data bus（22）Connect master controller（8）, it is respectively used to receive master controller（8）The TTL control signals and biography sent out
It is defeated by master controller（8）Transformed data-signal.
4. multichannel vibrational state parameter acquisition control sequential device according to claim 3, which is characterized in that the master control
Device processed（8）Including programmable logic device FPGA（23）, the programmable logic device FPGA（23）By passing through analog-to-digital conversion respectively
Controlling bus（21）With analog-digital conversion data bus（22）Connect modulus conversion chip（19）, the programmable logic device FPGA
（23）Signal input part be connected with startup trigger module（9）, for external to programmable logic device FPGA（23）Transmission TTL is opened
Dynamic signal, the programmable logic device FPGA（23）Signal input part be connected with internal acceleration trigger module（10）, it is used for
When acceleration reaches definite value to programmable logic device FPGA（23）Transmit TTL enabling signals.
5. multichannel vibrational state parameter acquisition control sequential device according to claim 1 or 4, which is characterized in that described
Fifo cache modules include the first fifo buffers（11）With the 2nd fifo buffers（12）, for alternately storing, described first
Fifo buffers（11）With the 2nd fifo buffers（12）It is separately connected master controller（8）Input/output terminal.
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| CN201721796265.2U CN207937846U (en) | 2017-12-21 | 2017-12-21 | A kind of multichannel vibrational state parameter acquisition control sequential device |
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| CN201721796265.2U CN207937846U (en) | 2017-12-21 | 2017-12-21 | A kind of multichannel vibrational state parameter acquisition control sequential device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107942913A (en) * | 2017-12-21 | 2018-04-20 | 苏州科技大学 | A kind of multichannel vibrational state parameter acquisition control sequential device |
| CN109406315A (en) * | 2018-11-29 | 2019-03-01 | 清华大学 | Firer's shock response many reference amounts cooperative device |
| CN115638700A (en) * | 2022-12-21 | 2023-01-24 | 北京星途探索科技有限公司 | A chronogenesis recording equipment for multichannel initiating explosive device |
-
2017
- 2017-12-21 CN CN201721796265.2U patent/CN207937846U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107942913A (en) * | 2017-12-21 | 2018-04-20 | 苏州科技大学 | A kind of multichannel vibrational state parameter acquisition control sequential device |
| CN109406315A (en) * | 2018-11-29 | 2019-03-01 | 清华大学 | Firer's shock response many reference amounts cooperative device |
| CN115638700A (en) * | 2022-12-21 | 2023-01-24 | 北京星途探索科技有限公司 | A chronogenesis recording equipment for multichannel initiating explosive device |
| CN115638700B (en) * | 2022-12-21 | 2023-02-28 | 北京星途探索科技有限公司 | A chronogenesis recording equipment for multichannel initiating explosive device |
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| CF01 | Termination of patent right due to non-payment of annual fee |