CN205482905U - Portable strain sensor detector and system - Google Patents
Portable strain sensor detector and system Download PDFInfo
- Publication number
- CN205482905U CN205482905U CN201620041597.9U CN201620041597U CN205482905U CN 205482905 U CN205482905 U CN 205482905U CN 201620041597 U CN201620041597 U CN 201620041597U CN 205482905 U CN205482905 U CN 205482905U
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- Prior art keywords
- circuit
- detector
- chip
- portable
- usb interface
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Abstract
The utility model provides a portable strain sensor detector and system, this detector include casing and circuit board, and the casing both sides are equipped with USB interface and circular connector respectively, be equipped with EZ -USB chip, FPGA chip, AD converting circuit, amplifier circuit, complete / half -bridge control circuit, voltage drive circuit on this circuit board, wherein the EZ -USB chip is connected to the USB interface, and amplifier circuit and voltage drive circuit all are connected to circular connector. The utility model provides a portable strain sensor detector and system, it is small, portable to adopt low -voltage constant voltage source mode to realize designing, the circuit consumption is extremely low, has guaranteed stronger duration, can adapt to the detection achievement environment before the flight better.
Description
Technical field
This utility model relates to aircraft technical field of measurement and test, is specifically related to a kind of portable strain transducer
Detector and system.
Background technology
Along with the development of China's aviation industry, new architecture continues to bring out, and test mission is also more and more numerous
Busy.In the test of aircraft dependent variable, there are a lot of installations one group or several groups of sensors are carried out having a competition
Situation about testing.Accordingly, it would be desirable to detect whether these strain transducers mount correctly in time, to ensure profit
The subsequent operation carried out with these strain transducers can be carried out exactly, thus improves pre-flight detection
Efficiency, it is ensured that flight test subject is efficiently completed smoothly.
At present, the most not can be used to directly detect whether these strain transducers mount quickly and accurately
Correct equipment, therefore can not ensure that the subsequent operation utilizing these strain transducers to carry out can be exactly
Carry out.
Utility model content
This utility model provides a kind of portable strain transducer detector and system, to solve prior art
In can not detect whether strain transducer mounts correct problem rapidly and accurately.
First aspect, this utility model provides a kind of portable strain transducer detector, described detector
Including housing and the circuit main board that is arranged on described enclosure interior, described housing is respectively provided on two sides with USB
Interface and aviation plug；Described circuit main board is provided with EZ-USB chip, fpga chip, A/D turn
Change circuit, amplifier circuit, complete/half bridge control, tension excitation circuitry, described EZ-USB chip,
Described fpga chip, described A/D change-over circuit and described amplifier circuit are sequentially connected with, described FPGA
Chip also with described entirely/half bridge control and described tension excitation circuitry be sequentially connected with, described EZ-USB
Chip is connected to described USB interface, described amplifier circuit and described tension excitation circuitry and is connected to institute
State aviation plug.
As the optimal way of this utility model first aspect, described circuit main board is additionally provided with power circuit,
Described power circuit is connected to described USB interface, described power circuit be respectively described EZ-USB chip,
Described fpga chip, described A/D change-over circuit, described amplifier circuit, described entirely/half-bridge control electricity
Road and described tension excitation circuitry are powered.
As the optimal way of this utility model first aspect, described housing both sides further respectively have power supply and refer to
Showing lamp and data display lamp, wherein said power supply indicator and described USB interface homonymy, described data refer to
Show lamp and described aviation plug homonymy；Described power supply indicator is connected to described power circuit, described data
Display lamp is connected to described fpga chip.
Second aspect, this utility model provides a kind of portable strain transducer detecting system, described system
Including portable computer and portable strain transducer detector as described in relation to the first aspect, Qi Zhongsuo
State portable computer to be connected with described portable strain transducer detector by described USB interface.
The portable strain transducer detector of this utility model offer and system, volume is little, it is simple to carry,
And using low-voltage constant pressure source pattern to realize this design, circuit power consumption is extremely low, it is ensured that stronger continuation of the journey energy
Power, can better adapt to pre-flight detection working environment.The portable strain that this utility model provides passes
Sensor detector and system can detect the underproof strain transducer of attachment the most quickly and accurately, because of
This can ensure that the subsequent operation utilizing these strain transducers to carry out can be carried out exactly, thus improves
Pre-flight detection efficiency, it is ensured that flight test subject is efficiently completed smoothly.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme in this utility model embodiment, embodiment will be retouched below
In stating, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only
It is embodiments more of the present utility model, for those of ordinary skill in the art, is not paying creation
Property work on the premise of, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The structural representation of the portable strain transducer detector that Fig. 1 provides for this utility model embodiment
Figure；
The circuit theory of the portable strain transducer detector that Fig. 2 provides for this utility model embodiment
Figure.
Wherein, 1, casing, 2, cover plate fixing screw hole, 3, mainboard fixing screw hole, 4, circuit
Mainboard, 5, USB interface, 6, power supply indicator, 7, aviation plug, 8, data display lamp.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing pair
This utility model embodiment is described in further detail.
This utility model embodiment discloses a kind of portable strain transducer detector, is important ground
Detection equipment, for ground detection librarian use.Its volume is little, it is simple to carry, and uses low-voltage constant voltage
Source, circuit power consumption is extremely low, it is ensured that stronger flying power, can better adapt to pre-flight detection work
Make environment, therefore can detect the strain transducer of attachment on aircraft easily the most correct, thus carry
High pre-flight detection efficiency, it is ensured that flight test subject is efficiently completed smoothly.
With reference to shown in Fig. 1, this detector includes housing and is arranged on the circuit main board 4 of enclosure interior,
This housing is made up of casing 1 and cover plate, and casing 1 is provided with cover plate fixing screw hole 2, by screw with
Cover plate can be fixed on casing 1 by cover plate fixing screw hole 2.It is additionally provided with mainboard on casing 1 and fixes screw
Hole 3, can be fixed on enclosure interior by circuit main board 4 by screw and mainboard fixing screw hole 3.Housing
Side be provided with USB interface 5 and power supply indicator 6, the opposite side of housing is provided with aviation plug 7 sum
According to display lamp 8.Wherein, USB interface 5 is used for connecting portable computer, thus portable computer
Can carry out information with this detector alternately and to power for whole detector, whole detector supports hot plug；
Aviation plug 7 is used for connecting strain transducer to be measured, such that it is able to obtain the strain of strain transducer to be measured
Signal.In the present embodiment, this aviation plug 7 uses 15 pin microspur aviation plugs.
With further reference to shown in Fig. 2, this circuit main board 4 be provided with EZ-USB chip, fpga chip,
A/D change-over circuit, amplifier circuit, complete/half bridge control, tension excitation circuitry, EZ-USB core
Sheet, fpga chip, A/D change-over circuit and amplifier circuit are sequentially connected with, fpga chip also with entirely/
Half bridge control and tension excitation circuitry are sequentially connected with, and EZ-USB chip is connected to USB interface 5,
Amplifier circuit and tension excitation circuitry are connected to aviation plug 7.
Being additionally provided with power circuit on circuit main board 4, this power circuit is connected to USB interface 5, power supply electricity
Road utilizes the power supply on portable computer to be respectively EZ-USB chip, fpga chip, A/D conversion
Circuit, amplifier circuit, complete/half bridge control and tension excitation circuitry are powered.Power circuit also with electricity
Source display lamp 6 connects, after portable computer completes to be connected with detector by USB interface 5, whole
Individual detector is energized, and now power supply indicator 6 can brighten, and indicates whole detector to be in "on" position.
Owing to whole detector uses USB interface 5 to be connected with portable computer, on circuit main board 4
The power supply of each component is provided after power circuit filtering conversion by USB interface 5.Power circuit bag
Include the 5V circuit after isolation filter, 5V turns 3.3V circuit, 5V turns 2.5V circuit, 5V turns 1.2V electricity
Road four part is constituted, and can be changed after isolation filter by the+5V power supply of input at USB interface 5
For multiple LVPS, to meet the needs of other components in circuit main board 4.
Strain transducer to be measured is provided driving voltage by tension excitation circuitry, owing to inputting at USB interface 5
The electric current of power supply limited, the flying power of portable computer is more weak, it is therefore desirable to the merit of circuit
Consuming the extremely low detection demand that could ensure, therefore use constant pressure source motivation model, every road is provided which independent excitation
Voltage source also exports to strain transducer to be measured through aviation plug 7.For reducing power consumption, driving voltage is chosen
4V low-voltage, amplifier is powered and is used 5V to power.
Before utilizing detector that strain transducer to be measured is detected, default is passed for strain to be measured
The configuration information of sensor is through the built-in RAM of USB interface 5 and EZ-USB chip write fpga chip
In.If when the most specifically detecting, need to change portion therein for different strain transducers to be measured
When dividing configuration information, the part configuration information after changing can be write through USB interface 5 and EZ-USB chip
Enter in the configuration information depositor of fpga chip.Wherein, configuration information mainly include sample rate, complete/half
Bridge setting, channel selecting and measurement range selection etc..
After having configured, when strain transducer to be measured is detected, answering of strain transducer to be measured output
Varying signal enters in amplifier circuit through aviation plug 7.In the present embodiment, amplifier circuit uses two-stage
Amplifying circuit, including first order amplifier and second level amplifier, can be amplified to ± 5V by strain signal,
Effectively meet the input full scale requirement of A/D converter in A/D change-over circuit.In the present embodiment, first
Level amplifier selects AD company instrument amplifier AD8228,100 times of fixed gains；Second level amplifier
Selecting AD company instrument amplifier AD8250,4 grades of programme-controlled gains, gain is respectively 1,2,5,10,
Range is measured in corresponding input 4 grades.
According to the configuration information of strain transducer to be measured, utilizing complete/half bridge control, every Lu Junke is independent
It is configured to full-bridge mode of operation or half-bridge mode of operation.When using full-bridge mode of operation, the strain letter of input
Number connect the positive-negative input end of first order amplifier respectively；When using half-bridge mode of operation, the strain letter of input
Number connecing the anode of first order amplifier, the negative terminal of first order amplifier is by the mould in complete/half bridge control
Intend switch and connect the 2V reference voltage signal provided by tension excitation circuitry.
Strain signal after amplification is converted to dependent variable data through A/D change-over circuit further, subsequently into
Fpga chip carries out digital processing.Key element A/D in the present embodiment, in A/D change-over circuit
Transducer selects the AD7606 conversion chip of AD company, and 8 tunnel input signals can be entered by this chip simultaneously
Row synchronized sampling keeps, timesharing conversion, and conversion resolution is 16, and high sampling rate is 200kHz/s,
The second order frequency overlapped-resistable filter of the integrated 8 tunnel independences of this chip internal simultaneously, the optional digital filter of output,
Realize smothing filtering and the extraction of data.AD7606 conversion chip internal reference voltage accuracy is poor, only
The precision of 1%.For improving conversion accuracy, selecting external reference voltage, external voltage reference selects AD public
The ADR431 chip of department, the output of 2.5V, precision is ± 3mV, and temperature stability is 10ppm.Should
Reference voltage is simultaneously converted into the output of 4V and 2V, defeated respectively as driving voltage in tension excitation circuitry
Go out midpoint reference voltage when benchmark and half-bridge mode of operation.
Dependent variable data are after fpga chip carries out digital processing, then the output buffering through fpga chip
District transmits to EZ-USB chip, transmits to portable computer through USB interface 5 further and shows,
For ground detection personnel's reference.It addition, fpga chip is also connected with data display lamp 8, work as dependent variable
When data proceed by digital processing, data display lamp 8 flashes, when the digital processing of dependent variable data stops
Time only, data display lamp 8 does not works.
This utility model embodiment also provides for a kind of portable strain transducer detecting system, and this system includes
Portable computer and the portable strain transducer detector as described in above-described embodiment, wherein this is just
Take formula computer to be connected with portable strain transducer detector by USB interface.Portable computer with
After above-mentioned detector connects, by portable computer, this detector can be configured and operates, place
Dependent variable data after reason show also by portable computer, for ground detection personnel's reference, from
And it is the most correct to detect the strain transducer of attachment on aircraft easily.In the present embodiment, portable
Formula computer is preferably panel computer.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all
Within spirit of the present utility model and principle, any modification, equivalent substitution and improvement etc. made, all
Within protection domain of the present utility model should be included in.
Claims (4)
1. a portable strain transducer detector, it is characterised in that described detector include housing with
And it being arranged on the circuit main board of described enclosure interior, described housing is respectively provided on two sides with USB interface and aviation
Plug；Described circuit main board is provided with EZ-USB chip, fpga chip, A/D change-over circuit, puts
Big device circuit, complete/half bridge control, tension excitation circuitry, described EZ-USB chip, described FPGA
Chip, described A/D change-over circuit and described amplifier circuit are sequentially connected with, described fpga chip also with
Described entirely/half bridge control and described tension excitation circuitry be sequentially connected with, described EZ-USB chip connects
To described USB interface, described amplifier circuit and described tension excitation circuitry are connected to described aviation and insert
Head.
Detector the most according to claim 1, it is characterised in that be additionally provided with on described circuit main board
Power circuit, described power circuit is connected to described USB interface, and described power circuit is respectively described
EZ-USB chip, described fpga chip, described A/D change-over circuit, described amplifier circuit, institute
State complete/half bridge control and described tension excitation circuitry is powered.
Detector the most according to claim 2, it is characterised in that described housing both sides set the most respectively
There are power supply indicator and data display lamp, wherein said power supply indicator and described USB interface homonymy, institute
State data display lamp and described aviation plug homonymy；Described power supply indicator is connected to described power circuit,
Described data display lamp is connected to described fpga chip.
4. a portable strain transducer detecting system, it is characterised in that described system includes portable
Computer and portable strain transducer detector as claimed any one in claims 1 to 3, its
Described in portable computer by described USB interface and described portable strain transducer detector even
Connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620041597.9U CN205482905U (en) | 2016-01-18 | 2016-01-18 | Portable strain sensor detector and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620041597.9U CN205482905U (en) | 2016-01-18 | 2016-01-18 | Portable strain sensor detector and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205482905U true CN205482905U (en) | 2016-08-17 |
Family
ID=56669492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620041597.9U Expired - Fee Related CN205482905U (en) | 2016-01-18 | 2016-01-18 | Portable strain sensor detector and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205482905U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109141342A (en) * | 2018-07-16 | 2019-01-04 | 哈尔滨工程大学 | A kind of handheld portable precision strain gauge |
-
2016
- 2016-01-18 CN CN201620041597.9U patent/CN205482905U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109141342A (en) * | 2018-07-16 | 2019-01-04 | 哈尔滨工程大学 | A kind of handheld portable precision strain gauge |
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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: 20160817 Termination date: 20220118 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |