CN108181858A - A kind of collection of simulant signal and storage device - Google Patents
A kind of collection of simulant signal and storage device Download PDFInfo
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- CN108181858A CN108181858A CN201810096159.6A CN201810096159A CN108181858A CN 108181858 A CN108181858 A CN 108181858A CN 201810096159 A CN201810096159 A CN 201810096159A CN 108181858 A CN108181858 A CN 108181858A
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- 230000005611 electricity Effects 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 7
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- 238000012216 screening Methods 0.000 claims description 5
- 239000013078 crystal Substances 0.000 claims description 4
- 238000002955 isolation Methods 0.000 claims description 3
- 239000004973 liquid crystal related substance Substances 0.000 claims description 2
- 238000001914 filtration Methods 0.000 abstract description 8
- 230000006870 function Effects 0.000 abstract description 5
- 230000000712 assembly Effects 0.000 abstract description 4
- 238000000429 assembly Methods 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 4
- 238000010200 validation analysis Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 15
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- 238000001514 detection method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24215—Scada supervisory control and data acquisition
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Abstract
The present invention relates to a kind of collection of simulant signal and storage devices, for the acquisition and storage of external analog signal, collection of simulant signal and storage device include microcontroller, analog voltage Acquisition Circuit, amplitude limiter circuit, filter circuit, frequency selection circuit, LCD MODULE, data memory module, power module and auxiliary circuit, microcontroller respectively with LCD MODULE, power module, data memory module, analog voltage Acquisition Circuit and auxiliary circuit are electrically connected, to control its work respectively, analog voltage acquisition module and frequency selection circuit are electrically connected, filter circuit is respectively and frequency selection circuit, amplitude limiter circuit is electrically connected.The device of the invention is based on STM32 microcontrollers, good reliability, function are simple, precision is higher, compared to other signal pickup assemblies, are easily combined with other data filtering algorithms, it realizes the validation processing of data, can apply in the environment of various simple analog signal acquisitions.
Description
Technical field
The present invention relates to collection of simulant signal technical field more particularly to a kind of collection of simulant signal and storage device.
Background technology
At present, Signal Collection Technology has had a great development, and analogue signal acquisition circuit both domestic and external also compares
It is more ripe.But the brand of collection of simulant signal device in the market is more, wherein the data collecting card circuit of the NI in the U.S. has been
Through quite ripe, reliability is high, and the data acquisition card of ripe brand is expensive, and structure is relative complex with function, relative to letter
Only for one collection of simulant signal function, cost performance is relatively low.Although the and signal pickup assembly price of domestic Low Tier Brand
It is cheap, but there are poor reliability, precision is relatively low the shortcomings that.Therefore, for the disadvantages described above of the prior art, it is necessory to design
A performance more preferably collection of simulant signal device.
Invention content
In view of this, it the present invention provides a kind of collection of simulant signal and storage device, the collection of simulant signal and deposits
Storage device is based on STM32 microcontrollers, and good reliability, function are simple, precision is higher, compared to other signal pickup assemblies, easily
It is combined with other data filtering algorithms, realizes the validation processing of data, can apply to various simple analog signal acquisitions
In environment.
To achieve the above object, present invention employs a kind of technical solutions：A kind of collection of simulant signal and storage device are used
In the acquisition and storage of external analog signal, the collection of simulant signal and storage device are adopted including microcontroller, analog voltage
Collector, amplitude limiter circuit, filter circuit, frequency selection circuit, LCD MODULE, data memory module, power module and auxiliary electricity
Road；The microcontroller respectively with the LCD MODULE, the power module, the data memory module, the simulation
Voltage collection circuit and the auxiliary circuit are electrically connected, to control its work, the analog voltage acquisition module and institute respectively
Frequency selection circuit electric connection is stated, the filter circuit is electrically connected respectively with the frequency selection circuit, the amplitude limiter circuit；The mould
Intend signal first by the amplitude limiter circuit, the amplitude of the analog signal is limited；Pass through the institute of the amplitude limiter circuit
It states analog signal and continues through the filter circuit, high-frequency signal therein is filtered, leave low frequency signal therein；Institute
It states the low frequency signal left in analog signal and continues through the frequency selection circuit, the signal screening of wherein specific frequency is come out；
The analog signal screened is continued through into the analog voltage Acquisition Circuit and carries out signal isolation and acquisition；Finally will
The analog signal of acquisition is input in the microcontroller, can be converted into digital signal.
Further, the amplitude limiter circuit is made of a bi-directional voltage stabilizing pipe, one end access ground of the bi-directional voltage stabilizing pipe
Line, the other end are connected with the signal input part of the amplitude limiter circuit, and the amplitude limiter circuit is used for limiting the width of the analog signal
Degree inhibits current surge.
Further, the filtered electrical routing resistance and capacitance composition, one end of the resistance and the filter circuit
Signal input part is connected, the other end is connected with the capacitance, and one end of the capacitance is defeated with the signal of the frequency selection circuit successively
Enter end and the resistance is connected, the other end is connected with ground wire.
Further, the frequency selection circuit is made of inductance, variable capacitance, variable resistance, the inductance with it is described variable
Resistance is connected, and the inductance of series connection is in parallel with the variable resistance and the variable capacitance, the input terminal of the frequency selection circuit
For the part being connected of the inductance with the variable capacitance, the output terminal of the frequency selection circuit is the resistance and described variable
The part that capacitance is connected.
Further, the analog voltage Acquisition Circuit is made of an operational amplifier, the operational amplifier it is same
To the signal input part that input terminal is the analog voltage Acquisition Circuit, the reverse input end of the operational amplifier and the mould
The signal output end for intending voltage collection circuit is connected, signal output end and the microcontroller of the analog voltage Acquisition Circuit
ADC signal input terminal be connected.
Further, the auxiliary circuit includes crystal oscillating circuit, reset circuit and shunt capacitance group.
Further, the microcontroller is the micro- devices processed of STM32F103.
Further, the LCD MODULE is connected with the I/O port of the microcontroller, for real-time display acquisition
Whether data facilitate staff to carry out reading and detection data in real time normal.
Further, the power module includes voltage conversion circuit, electric source filter circuit and power supply indicator, the electricity
Source module for exporting stable voltage, for the collection of simulant signal and storage device driving and prevent external power supply anti-
It connects.
Further, the data memory module is made of SD card and storage circuit, the data memory module
SDIO interfaces are connected with the SDIO interfaces of the microcontroller, and the data of acquisition can be written in the SD card.
The advantageous effect brought of technical solution that the embodiment of the present invention provides is：
1. the collection of simulant signal device based on STM32 microcontrollers, the STM32F106ZET6 for having selected STMicw Electronics are mono-
Piece machine is as master control, based on the exclusive 130nm manufacturing process of STMicw Electronics, to realize ultralow leak current characteristic, in work
Make and sleep pattern under, super low-power consumption technology can improving energy efficiency to greatest extent；In addition, the embedded flash memory of the platform uses meaning method
The exclusive low-power consumption flash memory technology of semiconductor can complete task in any setting time with minimum power consumption.
2. the collection of simulant signal device based on STM32 microcontrollers, compared to other signal pickup assemblies, easily and other
Data filtering algorithm is combined, and realizes the validation processing of data.
3. the collection of simulant signal device based on STM32 microcontrollers, good reliability, function is simple, and precision is higher, can apply
In the environment of various simple analog signal acquisitions.
Description of the drawings
Fig. 1 is the collection of simulant signal of the present invention and memory device structure schematic diagram；
Fig. 2 is the collection of simulant signal of the present invention and the circuit connection diagram of the amplitude limiter circuit of storage device；
Fig. 3 is the circuit connection diagram of the collection of simulant signal of the present invention and the filter circuit of storage device；
Fig. 4 is the circuit connection diagram of the collection of simulant signal of the present invention and the frequency selection circuit of storage device；
Fig. 5 is the collection of simulant signal of the present invention and the signal acquisition circuit connection figure of storage device；
Fig. 6 is the circuit connection diagram of the collection of simulant signal of the present invention and the LCD MODULE of storage device；
Fig. 7 is the composition schematic diagram of the collection of simulant signal of the present invention and the microcontroller minimum system of storage device；
Fig. 8 is the circuit connection diagram of the collection of simulant signal of the present invention and the microcontroller minimum system of storage device；
Fig. 9 is the composition schematic diagram of the collection of simulant signal of the present invention and the power module of storage device；
Figure 10 is the circuit connection diagram of the collection of simulant signal of the present invention and the power module of storage device；
Figure 11 is the composition schematic diagram of the collection of simulant signal of the present invention and the data memory module of storage device；
Figure 12 is the circuit connection diagram of the collection of simulant signal of the present invention and the data memory module of storage device.
Attached figure label：10- amplitude limiter circuits, 20- filter circuits, 30- frequency selection circuits, 40 analog voltage Acquisition Circuits, 50-
LCD MODULE, 60- microcontrollers, 70- auxiliary circuits, 71- crystal oscillating circuits, 72- reset circuits, 73- shunt capacitance groups,
80- power modules, 81- voltage conversion circuits, 82- electric source filter circuits, 83- power supply indicators, 90- data memory modules, 91-
SD card, 92- storage circuits, 100- microcontroller minimum systems, D- bi-directional voltage stabilizing pipes, R01- resistance, C01- capacitances, L001- electricity
Sense, C001- variable capacitances, R001- variable resistances, LM324- operational amplifiers, the signal input part of IN0001- amplitude limiter circuits,
The signal input part of IN001- filter circuits, the signal input part of IN01- frequency selection circuits, IN1- analog voltage Acquisition Circuits
Signal input part, the ADC input terminals of ADC IN1- microcontrollers, the 3.3V voltage input ends of VCC3.3- microcontrollers, VCC5-
The 5V voltage input ends of microcontroller, POWER- external worlds power supply, GND- ground wires.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is further described.
As shown in Figure 1, the present invention a kind of collection of simulant signal and storage device, for external analog signal acquisition and
Storage, the collection of simulant signal and storage device include amplitude limiter circuit 10, filter circuit 20, frequency selection circuit 30, analog voltage
Acquisition Circuit 40, LCD MODULE 50, microcontroller 60, auxiliary circuit 70, power module 80 and data memory module 90.Institute
State microcontroller 60 respectively with the LCD MODULE 50, the power module 80, the data memory module 90, the mould
Intend voltage collection circuit 40 and the auxiliary circuit 70 is electrically connected, to control its work respectively.The analog voltage acquires mould
Block 40 and the frequency selection circuit 30 are electrically connected, the filter circuit 20 respectively with the frequency selection circuit 30, the amplitude limiter circuit
10 are electrically connected.
As shown in Fig. 2, the amplitude limiter circuit 10 is made of a bi-directional voltage stabilizing pipe D, one end D3 of the bi-directional voltage stabilizing pipe D
Access ground wire, other end D1 are connected with the signal input part IN0001 of the amplitude limiter circuit 10, and the amplitude limiter circuit 10 is used for limiting
The amplitude of the analog signal is made, inhibits current surge.
As shown in figure 3, the filter circuit 20 is made of resistance R01 and capacitance C01, for carrying out low-pass filtering.It is described
One end of resistance R01 is connected with the signal input part IN001 of the filter circuit 20, the other end of the resistance R01 with it is described
Capacitance C01 is connected, one end of the capacitance C01 successively with the signal input part IN01 of the frequency selection circuit 30, the resistance R01
It is connected, the capacitance C01 other ends are connected with ground wire.The filter circuit 20 carries out the analog signal of input simple low
Pass filter can filter HF noise signal therein, and the range of the high-frequency signal of filtering depends on the big of capacitance and resistance
Small and the two product, such as when capacitance is 0.1uf, resistance is 10k, more than the frequency of f=1/ (2 π fc)=1592Hz
It will be unable to pass through, therefore can be by the frequency limit of the analog signal of outside output within limits, so as to follow-up
Frequency selection circuit into line frequency select.
As shown in figure 4, the frequency selection circuit 30 is made of inductance L001, variable capacitance C001, variable resistance R001, it is described
Inductance L001 connects with the variable resistance R001, and the inductance and the variable resistance of series connection and the variable capacitance are simultaneously
Connection, the input terminal IN01 of the frequency selection circuit 30 is the inductance L001 and the part being connected of the variable capacitance C001, institute
The output terminal for stating frequency selection circuit 30 is the part that the resistance R001 is connected with the variable capacitance C001.The frequency selection circuit 30
Frequency screening is carried out to the analog signal of input, the quality factor of signal is improved, obtains the mould of particular frequency range
Intend signal.
As shown in figure 5, the analog voltage Acquisition Circuit 40 is made of an operational amplifier LM324, the operation is put
The noninverting input of big device LM324 is the signal input part IN1 of the analog voltage Acquisition Circuit 40, the operational amplifier
The reverse input end of LM324 is connected with the signal output end of the analog voltage Acquisition Circuit 40, the analog voltage acquisition electricity
The signal output end on road 40 is connected with the ADC signal input terminal ADC IN1 of the microcontroller 60, the operational amplifier
LM324 is to form a voltage follower to increase input impedance, and signal is made not decay.
IO (Input/Output, input/output) mouth of the LCD MODULE 50 and the microcontroller 60 is connected,
For the data of real-time display acquisition, staff is facilitated to carry out reading and detection data in real time whether normal.Preferably, it is described
LCD MODULE 50 is 1602 liquid crystal displays.Shown in fig. 6 is the circuit diagram of the LCD MODULE 50.
As shown in fig. 7, the microcontroller 60 and the auxiliary circuit 70 collectively form the collection of simulant signal and deposit
The microcontroller minimum system 100 of storage device.Preferably, the microcontroller 60 is the micro- devices processed of STM32F103.The auxiliary electricity
Road 70 mainly includes crystal oscillating circuit 71, reset circuit 72 and shunt capacitance group 73.Shown in Fig. 8 is that the microcontroller is minimum
The circuit diagram of system 100.
As shown in Figures 9 and 10, the power module 80 is for exporting stable voltage, for the collection of simulant signal and
The driving of storage device and prevent external power supply POWER reversal connections.The power module 80 includes voltage conversion circuit 81, power supply is filtered
Wave circuit 82 and power supply indicator 83；When opening the collection of simulant signal and storage device, the external power supply POWER
The voltage of input exports two voltages by the voltage conversion circuit 81；Two voltages of output are through the power filter simultaneously
After circuit 82, form stable output voltage and driven for the microcontroller 60.For example, input 12V voltages pass through the voltage
Conversion circuit 81 exports relevant voltage.Voltage conversion circuit 81 includes two parts, and 12V electric industries are converted into 9V mono- and incited somebody to action by one
12V voltages are converted into 3.3V.The power supply indicator 83 be used for represent the collection of simulant signal and storage device closing or
It opens, such as when the power supply indicator 83 lights, expression is working.
As shown in figure 11, the data memory module 90 is by SD card (Trans-flash Card) 91 and storage circuit 92
It forms, (Secure Digital Input and Output, secure digital input are defeated by the SDIO of the data memory module 90
Going out) interface is connected with the SDIO interfaces of the microcontroller 60, the data of acquisition can be written in the SD card 91.Figure 12 institutes
What is shown is the circuit diagram of the data memory module 90.
The implementation of the present invention is that the analog signal passes through the amplitude limiter circuit 10, the amplitude limiter circuit 10 first
For limiting the amplitude of the analog signal, inhibit current surge, by the analog signal output of safety to next stage.It is described
Analog signal can be by the mould by continuing through the filter circuit 20, the filter circuit 20 after the amplitude limiter circuit 10
The most of high-frequency interferencing signal for intending signal is filtered, and is left low frequency signal and is continued to output next stage.The analog signal
In low frequency signal continue through the frequency selection circuit 30, the frequency selection circuit 30 is big by adjusting the variable capacitance C001's
It is small, can in the signal left selection signal frequency, by adjusting variable resistance R001 size select bandwidth, can will
The signal screening of specific frequency comes out, and the analog signal screened is continued to output next stage.The simulation letter of screening
Number continue through the analog voltage Acquisition Circuit 40, using its input impedance it is larger the characteristics of, play signal isolation and acquisition
Effect, the analog signal of acquisition is directly inputted to the ADC signal input terminal of the microcontroller 60.For convenience of reason
Solution, the analog signal voltage can be 0 between 3V.The analog signal of acquisition is in the microcontroller 60 using interior
The ADC of 12 precision in portion carries out data acquisition, and the analog signal is converted into digital signal, 60 profit of microcontroller
Digital filtering is carried out with digital filtering algorithm, obtains effective digital signal, and the digital signal is stored, such as deposit
Storage is in the data memory module 90.
The advantageous effect brought of technical solution that the embodiment of the present invention provides is：
1. the collection of simulant signal device based on STM32 microcontrollers, the STM32F106ZET6 for having selected STMicw Electronics are mono-
Piece machine is as master control, based on the exclusive 130nm manufacturing process of STMicw Electronics, to realize ultralow leak current characteristic, in work
Make and sleep pattern under, super low-power consumption technology can improving energy efficiency to greatest extent；In addition, the embedded flash memory of the platform uses meaning method
The exclusive low-power consumption flash memory technology of semiconductor can complete task in any setting time with minimum power consumption.
2. the collection of simulant signal device based on STM32 microcontrollers, compared to other signal pickup assemblies, easily and other
Data filtering algorithm is combined, and realizes the validation processing of data.
3. the collection of simulant signal device based on STM32 microcontrollers, good reliability, function is simple, and precision is higher, can apply
In the environment of various simple analog signal acquisitions.
What deserves to be explained is：In all circuit connection diagrams of the present invention, all components in figure (such as ground wire,
Diode, resistance, capacitance etc.) and element circuit etc. figure and letter symbol using national standard circuit schematic symbol.
In the absence of conflict, the feature in embodiment and embodiment herein-above set forth can be combined with each other.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of collection of simulant signal and storage device, for the acquisition and storage of external analog signal, it is characterised in that：It is described
Collection of simulant signal and storage device include microcontroller, analog voltage Acquisition Circuit, amplitude limiter circuit, filter circuit, frequency-selecting electricity
Road, LCD MODULE, data memory module, power module and auxiliary circuit；The microcontroller respectively with the liquid crystal
Show that module, the power module, the data memory module, the analog voltage Acquisition Circuit and the auxiliary circuit electrically connect
It connects, to control its work respectively, the analog voltage acquisition module and the frequency selection circuit are electrically connected, the filter circuit point
It is not electrically connected with the frequency selection circuit, the amplitude limiter circuit；The analog signal is first by the amplitude limiter circuit, to described
The amplitude of analog signal is limited；The filter circuit is continued through by the analog signal of the amplitude limiter circuit, it will
High-frequency signal therein is filtered, and leaves low frequency signal therein；The low frequency signal left in the analog signal continues to lead to
The frequency selection circuit is crossed, the signal screening of wherein specific frequency is come out；The analog signal screened is continued through
The analog voltage Acquisition Circuit carries out signal isolation and acquisition；The analog signal of acquisition is finally input to the micro-control
In device processed, digital signal can be converted into.
2. a kind of collection of simulant signal as described in claim 1 and storage device, it is characterised in that：The amplitude limiter circuit is by one
A bi-directional voltage stabilizing pipe is formed, and one end access ground wire, the other end and the signal of the amplitude limiter circuit of the bi-directional voltage stabilizing pipe input
End is connected, and the amplitude limiter circuit is used for limiting the amplitude of the analog signal, inhibits current surge.
3. a kind of collection of simulant signal as described in claim 1 and storage device, it is characterised in that：The filter circuit is by electricity
Resistance and capacitance composition, one end of the resistance is connected with the signal input part of the filter circuit, the other end and the capacitance phase
Even, one end of the capacitance be connected successively with the signal input part of the frequency selection circuit and the resistance, the other end and ground wire phase
Even.
4. a kind of collection of simulant signal as described in claim 1 and storage device, it is characterised in that：The frequency selection circuit is by electricity
Sense, variable capacitance, variable resistance composition, the inductance connects with the variable resistance, the inductance of series connection with it is described variable
Resistance and the variable capacitance are in parallel, and the input terminal of the frequency selection circuit is the portion that is connected of the inductance with the variable capacitance
Point, the output terminal of the frequency selection circuit is the part that the resistance is connected with the variable capacitance.
5. a kind of collection of simulant signal as described in claim 1 and storage device, it is characterised in that：The analog voltage acquisition
Circuit is made of an operational amplifier, and the noninverting input of the operational amplifier is the letter of the analog voltage Acquisition Circuit
Number input terminal, the reverse input end of the operational amplifier are connected with the signal output end of the analog voltage Acquisition Circuit, institute
The signal output end for stating analog voltage Acquisition Circuit is connected with the ADC signal input terminal of the microcontroller.
6. a kind of collection of simulant signal as described in claim 1 and storage device, it is characterised in that：The auxiliary circuit includes
Crystal oscillating circuit, reset circuit and shunt capacitance group.
7. a kind of collection of simulant signal as described in claim 1 and storage device, it is characterised in that：The microcontroller is
The micro- devices processed of STM32F103.
8. a kind of collection of simulant signal as described in claim 1 and storage device, it is characterised in that：The LCD MODULE
It is connected with the I/O port of the microcontroller, for the data of real-time display acquisition, staff is facilitated read and examine in real time
Whether measured data is normal.
9. a kind of collection of simulant signal as described in claim 1 and storage device, it is characterised in that：The power module includes
Voltage conversion circuit, electric source filter circuit and power supply indicator, the power module is for exporting stable voltage, for described
The driving of collection of simulant signal and storage device and prevent external power supply reversal connection.
10. a kind of collection of simulant signal as described in claim 1 and storage device, it is characterised in that：The data store mould
Block is made of SD card and storage circuit, the SDIO interfaces of the data memory module and the SDIO interface phases of the microcontroller
Even, the data of acquisition can be written in the SD card.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810096159.6A CN108181858A (en) | 2018-01-31 | 2018-01-31 | A kind of collection of simulant signal and storage device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810096159.6A CN108181858A (en) | 2018-01-31 | 2018-01-31 | A kind of collection of simulant signal and storage device |
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| CN108181858A true CN108181858A (en) | 2018-06-19 |
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| CN201810096159.6A Pending CN108181858A (en) | 2018-01-31 | 2018-01-31 | A kind of collection of simulant signal and storage device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109815180A (en) * | 2019-01-21 | 2019-05-28 | 安徽升隆电气有限公司 | A kind of local area network signal concentrated collection processor |
| CN111794306A (en) * | 2020-07-15 | 2020-10-20 | 徐州徐工挖掘机械有限公司 | Pilot oil pressure control method, device, controller, and storage medium |
| CN114253249A (en) * | 2021-12-13 | 2022-03-29 | 潍柴动力股份有限公司 | Inductive position sensor simulation device |
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| CN114253249A (en) * | 2021-12-13 | 2022-03-29 | 潍柴动力股份有限公司 | Inductive position sensor simulation device |
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Application publication date: 20180619 |
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