CN106652679A - Foucault pendulum demonstration device - Google Patents
Foucault pendulum demonstration device Download PDFInfo
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- CN106652679A CN106652679A CN201710124161.5A CN201710124161A CN106652679A CN 106652679 A CN106652679 A CN 106652679A CN 201710124161 A CN201710124161 A CN 201710124161A CN 106652679 A CN106652679 A CN 106652679A
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- pendulum
- swing ball
- optoelectronic switch
- demonstrating
- ball
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/08—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics
- G09B23/10—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics of solid bodies
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- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
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Abstract
The invention discloses a foucault pendulum demonstration device. The foucault pendulum demonstration device comprises a simple pendulum, a permanent magnet, an optoelectronic switch, a PLC, a relay and an electromagnetic coil, wherein the simple pendulum is provided with a pendulum line and a pendulum ball, one end of the pendulum line is fixed, the other end of the pendulum line is connected with the pendulum ball, and the period of the simple pendulum is T; the permanent magnet is mounted on the pendulum ball; the optoelectronic switch is used for detecting that whether the pendulum ball passes by above, and when the pendulum ball passes by, the intensity change of light between a transmitting end and a receiving end of the optoelectronic switch is converted into the change of current; the PLC is used for receiving electrical signals of the optoelectronic switch and generating a corresponding control instruction; the relay is used for receiving the control instruction for switching on or off the PLC, and making corresponding movement; the switching on or off of a power supply of the electromagnetic coil is controlled by the relay, and the electromagnetic coil is used for attracting the permanent magnet on the pendulum ball, and providing compensation force for the pendulum ball. The foucault pendulum demonstration device realizes the long-time swing and can be observed for a long time, the experimental phenomenon is continuous and repeated so as to be easily captured, the whole structure is high in stability, the long-time circular demonstration is satisfied, and the display effect is good.
Description
Technical field
The present invention relates to a kind of device used in science and education test and recreation.It is more particularly related to
A kind of Foucault pendulum apparatus for demonstrating for science and education test.
Background technology
In order to prove the earth in rotation, French physician Foucault（1819—1868）Do once successful in 1851
Experiment is swung, Foucault pendulum is gained the name therefrom.Experiment is carried out below Paris, FRA sage of the past's ancestral temple highest dome, 67 meters of pendulum length, pendulum
Hammer weighs 28 kilograms, and hitch point minimizes friction through particular design.This pendulum inertia and momentum are big, thus substantially
Do not affected by earth rotation and voluntarily swung, and duration of oscillation is very long.In Foucault pendulum test, it is seen that, swing process
Middle swinging plane is slowly rotated along clockwise direction, and swaying direction is continually changing.This phenomenon is analyzed, is put in swinging plane direction
Upper not acted on by external force, according to the law of inertia, the direction in space of swing will not change, it will be appreciated that, this swing side
To change, be the result of the earth that is located due to observer along rotate in an anti-clockwise direction, tellurian observer sees phase
It is in rotation so as to convincingly demonstrate the earth to motion artifacts.
Existing Foucault pendulum is used in science and education test, specifically, generally includes following structure：Cycloid, swing ball and swing ball lower section
Base, direction line is identified with base.Swing ball is placed into certain height, swing ball is discharged, swings flat in swing ball swing process
Face slowly rotates along clockwise direction, the direction line on respect thereto, swaying direction is continually changing, judge due to the earth from
Transduction causes the generation of this kind of phenomenon.
The Foucault pendulum for being used for science and education test in prior art has the disadvantage that：First, cumbersome complexity, realizes phenomenon not
Easily observation；2nd, swing ball in swing process due to air drag, energy quickly, be available for observe time it is few, experimental phenomena is difficult
Catch；3rd, total stability is relatively low, it is impossible to meet prolonged circulation demonstration, fragile, repair rate is high.
How a Foucault pendulum apparatus for demonstrating to be designed, it is its simple structure, easy to operate, using the teaching of the invention it is possible to provide balancing force, realize length
The swing of time, this is urgent problem.
The content of the invention
Defect in order to overcome prior art of the invention, discloses a kind of Foucault pendulum apparatus for demonstrating.
It is an object of the present invention to a kind of Foucault pendulum apparatus for demonstrating is designed, simple structure, easy to operate, Neng Gouti
For balancing force, prolonged swing is realized, bandwagon effect is good, and Stability Analysis of Structures, long service life.
In order to realize these purposes of the invention and further advantage, there is provided a kind of Foucault pendulum apparatus for demonstrating, including：
Single pendulum, it has cycloid and swing ball, and described cycloid one end is fixed, other end connection swing ball, and the cycle of the single pendulum is T；
Permanent magnet, it is arranged on swing ball；
Optoelectronic switch, it is used to detect whether top has swing ball to pass through, when swing ball passes through, the transmitting terminal of optoelectronic switch and reception
The strong and weak change of light between end is converted into the change of electric current；
PLC, it is used to receive the electric signal of optoelectronic switch, and produces corresponding control instruction；
Relay, it is used to receive the control instruction of PLC power on/off, and makes corresponding action；
Solenoid, its on/off is controlled by above-mentioned relay, for attracting the permanent magnet on swing ball, for swing ball compensation is provided
Power；
Power supply, it provides electric energy for above-mentioned each electric elements；
Wherein, when being designated as 0 when the swing ball of single pendulum is by minimum point, after the 0.5T times are slightly less than, relay closure 0.1-
Disconnect again after 0.3s.
Preferably, the cycloid is connected by the first fixation silk with swing ball.
Preferably, described first silk is fixed in cone, cone bottom surface middle part extends outward threaded post, threaded post
On open up through hole and extend to that circular cone is external, centripetal on the swing ball to open up the first screwed hole, described first fixes the spiral shell of silk
Line post is inserted into fixing cycloid and screws in the first screwed hole.
Preferably, the permanent magnet is annular shape, and is connected with swing ball by the second fixation silk.
Preferably, described second silk is fixed in cone, cone bottom surface middle part extends outward threaded post, the pendulum
It is centripetal on ball to open up the second screwed hole, it is socketed permanent magnet in the threaded post of the second fixation silk and screws in the second screwed hole.
Preferably, first screwed hole and the second screwed hole are symmetrical with respect to the swing ball centre of sphere.
Preferably, the solenoid is wrapped in optoelectronic switch periphery.
Preferably, the solenoid and optoelectronic switch positioned at swing ball naturally droop when position directly below.
Preferably, the solenoid and optoelectronic switch are arranged in base, and Base edge is provided with one week guardrail.
The present invention at least includes following beneficial effect：Due to installing permanent magnet on the swing ball of single pendulum, single pendulum is in swing process
In, the solenoid power on/off below PLC control single pendulums, by attracting permanent magnet constantly to swing ball balancing force in good time, therefore
Single pendulum can long-time with same-amplitude swing, will not stop because of air drag decay, it is simple structure, easy to operate, using the teaching of the invention it is possible to provide
Balancing force, realizes prolonged swing, is available for the time observed long, and experimental phenomena constantly repeats easily seizure, and total is steady
Qualitative height, meets prolonged circulation demonstration, and bandwagon effect is good；Because cycloid is connected by the first fixation silk with swing ball,
Therefore it is easy to the connection of cycloid and swing ball, dismounts rapid and convenient, structure is novel, stable, and repair rate is low, long service life；Due to
Permanent magnet is annular shape, and is connected with swing ball by the second fixation silk, therefore is easy to the connection of swing ball and permanent magnet, dismounts
Rapid and convenient, circular permanent magnet is socketed on the second fixation silk is easy to position adjustments, good positioning effect, and structure is novel, steady
It is fixed；Because solenoid is wrapped in optoelectronic switch periphery, therefore compact conformation, volume is greatly reduced, and globality is improved；Due to electricity
Magnetic coil and optoelectronic switch are arranged in base, and Base edge is provided with one week guardrail, therefore solenoid and optoelectronic switch are integrated
In base, circuit safety coefficient is high, and appearance is good, and guardrail avoids test from being disturbed by external environment condition, improves product
The accuracy of demonstration.
The further advantage of the present invention, target and feature embody part by description below, and part will also be by this
The research of invention and practice and be understood by the person skilled in the art.
Description of the drawings
Fig. 1 is the overall structure diagram of Foucault pendulum apparatus for demonstrating in embodiments of the invention；
Fig. 2 is the circuit diagram of Foucault pendulum apparatus for demonstrating in embodiments of the invention；
Fig. 3 is the amplification view of Foucault pendulum apparatus for demonstrating swing ball in embodiments of the invention；
Fig. 4 is the installation diagram of Foucault pendulum apparatus for demonstrating protective cover and tripod in embodiments of the invention.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is described in further detail, to make those skilled in the art with reference to specification text
Word can be implemented according to this.
It should be appreciated that it is used herein such as " have ", "comprising" and " including " term do not allot one or many
The presence or addition of individual other elements or its combination.
Fig. 1 to 4 shows a kind of way of realization of the invention, including：Single pendulum 1, the single pendulum 1 has cycloid
11 and swing ball 12, the one end of the cycloid 11 is fixed, other end connection swing ball 12, and cycle of the single pendulum 1 is T, the swing ball 12
Upper installation permanent magnet 2, the lower section of swing ball 12 arranges optoelectronic switch, the photoelectric switching signal output when single pendulum 1 is naturally drooped
Hold and be connected with the signal input part of letter victory PLCXC2-16T, the signal output part and solid-state relay for believing victory PLCXC2-16T is input into
End connection, the output end of solid-state relay connects respectively the positive-negative power input of solenoid, and the optoelectronic switch, letter are prompt
The electric energy of PLCXC2-16T and solid-state relay is provided by 24V dc sources, and the electric energy of the solenoid is by 48V direct currents
Source provides, and 24V, 48V dc source is obtained by power transformer conversion line voltage, when the swing ball 12 of single pendulum 1 is by most
When being designated as 0 during low spot, after the 0.5T times are slightly less than, letter victory PLCXC2-16T transmits a signal to solid-state relay, solid-state after
Electrical equipment is connected and disconnected again after solenoid power supply 0.2s.Permanent magnet is installed, single pendulum is in swing process on the swing ball of single pendulum of the present invention
In, the solenoid power on/off below PLC control single pendulums, by attracting permanent magnet constantly to swing ball balancing force in good time, therefore
Single pendulum can long-time with same-amplitude swing, will not stop because of air drag decay, it is simple structure, easy to operate, using the teaching of the invention it is possible to provide
Balancing force, realizes prolonged swing, is available for the time observed long, and experimental phenomena constantly repeats easily seizure, and total is steady
Qualitative height, meets prolonged circulation demonstration, and bandwagon effect is good.
Single pendulum 1 is used to prove that single pendulum is affected in swing process by earth rotation；Cycloid 11 and swing ball 12 constitute wanting for single pendulum
Part；Permanent magnet 2 is used to produce interattraction with the solenoid after energization；Optoelectronic switch, it is used to detect whether top has pendulum
Ball passes through, and when swing ball passes through, the strong and weak change of light between the transmitting terminal and receiving terminal of optoelectronic switch is converted into the change of electric current；
Letter victory PLCXC2-16T is used to receive the electric signal of optoelectronic switch, and produces corresponding control instruction；Solid-state relay is used to connect
The control instruction of PLC power on/off is received, and makes corresponding action；Solenoid is used to attract the permanent magnet on swing ball, is swing ball
Balancing force is provided；24V, 48V dc source provides electric energy for above-mentioned each electric elements.
In this technical scheme, the swing ball of single pendulum is lifted into certain height to side, cycloid is stretched, cycloid with it is vertical
The angle in direction is not more than 10 degree, then discharges swing ball, while being powered for each electric elements.Permanent magnetism is installed on the swing ball of single pendulum
Iron, single pendulum is in swing process, and the solenoid power on/off below PLC control single pendulums is continuous by attraction permanent magnet in good time
Can will not stop, structure letter to swing ball balancing force, therefore single pendulum because of air drag decay for a long time with same-amplitude swing
It is single, easy to operate, using the teaching of the invention it is possible to provide balancing force, prolonged swing is realized, it is available for the time observed long, experimental phenomena constantly repeatedly holds
Easily catch, total stability is high, meet prolonged circulation demonstration, bandwagon effect is good.
In another kind of example, the cycloid 11 is connected by the first fixation silk 3 with swing ball 12, and described first fixes
Silk 3 is in cone, and cone bottom surface middle part extends outward threaded post 31, through hole 32 is opened up in threaded post 31 and extends to circle
Outside cone, centripetal on the swing ball 12 to open up the first screwed hole 4, the threaded post 31 of the first fixation silk 3 is inserted into fixing pendulum
Line 11 is simultaneously screwed in the first screwed hole 4.There is the connection for being easy to cycloid and swing ball using this scheme, rapid and convenient, knot is dismounted
Structure is novel, stable, and repair rate is low, the benefit of long service life.Also, this mode is a kind of saying for preferred embodiments
It is bright, but be not limited thereto.
In another kind of example, the permanent magnet 2 is annular shape, and is connected with swing ball 12 by the second fixation silk 5,
Described second fixes silk 5 in cone, and cone bottom surface middle part extends outward threaded post 51, centripetal on the swing ball 12 to open up
Second screwed hole 6, is socketed permanent magnet 2 and screws in the second screwed hole 6 in the threaded post 51 of the second fixation silk 5.Using this
The scheme of kind has the connection for being easy to swing ball and permanent magnet, dismounts rapid and convenient, and circular permanent magnet is socketed in the second fixation silk
On be easy to position adjustments, good positioning effect, novel, the stable benefit of structure.Also, this mode is a kind of preferable reality
The explanation of example, but be not limited thereto.
In another kind of example, the solenoid is wrapped in optoelectronic switch periphery.Have structure tight using this scheme
Gather, volume is greatly reduced, the benefit that globality is improved.Also, this mode is a kind of explanation of preferred embodiments, but and
It is not limited to this.
In another kind of example, the solenoid and optoelectronic switch are arranged in base 7, and the edge of base 7 is provided with one week
Guardrail 8.Using this scheme solenoid and optoelectronic switch integrated installation in base, circuit safety coefficient is high, appearance
Good, guardrail avoids test from being disturbed by external environment condition, improves the benefit of the accuracy of product demonstration.Also, this mode
A kind of simply explanation of preferred embodiments, but be not limited thereto.
In another kind of example, the fixing end of the cycloid 11 is connected in protective cover 9, and protective cover 9 is the circle of one end open
Tubular, the protective cover 9 is hung upside down on the house beam on roof, and four tripods 10, root are screwed on the cylinder bottom of protective cover 9
Need to open up installing hole on tripod 10 according to size, house beam side is fixed on through expansion bolt in installing hole when using.Adopt
Having with this scheme can keep the cleaning of cycloid fixing end, it is to avoid test is disturbed by external environment condition, improve product demonstration
Accuracy, by tripod, in house beam side, punching is fixed, and protective cover more consolidates with the connection of house beam, and load-bearing is big, raising
The benefit of safety in utilization.Also, this mode is a kind of explanation of preferred embodiments, but is not limited thereto.
As described above, according to the present invention, due to installing permanent magnet on the swing ball of single pendulum, single pendulum in swing process, control by PLC
Solenoid power on/off below single pendulum processed, by attracting permanent magnet constantly to swing ball balancing force in good time, therefore single pendulum can
Long-time will not be stopped with same-amplitude swing because of air drag decay, simple structure, easy to operate, using the teaching of the invention it is possible to provide balancing force, real
Now swing for a long time, be available for the time observed long, experimental phenomena constantly repeats easily seizure, and total stability is high, full
The prolonged circulation demonstration of foot, bandwagon effect is good；Because cycloid is connected by the first fixation silk with swing ball, therefore it is easy to pendulum
Line and the connection of swing ball, dismount rapid and convenient, and structure is novel, stable, and repair rate is low, long service life；Because permanent magnet is circle
Ring-type, and be connected with swing ball by the second fixation silk, therefore it is easy to the connection of swing ball and permanent magnet, rapid and convenient is dismounted,
Circular permanent magnet is socketed on the second fixation silk is easy to position adjustments, good positioning effect, and structure is novel, stable；Due to electricity
Magnetic coil is wrapped in optoelectronic switch periphery, therefore compact conformation, and volume is greatly reduced, and globality is improved；Due to solenoid and
Optoelectronic switch is arranged in base, and Base edge is provided with one week guardrail, therefore solenoid and optoelectronic switch integrated installation the bottom of at
In seat, circuit safety coefficient is high, and appearance is good, and guardrail avoids test from being disturbed by external environment condition, improves the standard of product demonstration
True property.
Although embodiment of the present invention is disclosed as above, it is not restricted to listed in specification and embodiment
With.It can be applied to completely various suitable the field of the invention.For those skilled in the art, can be easily
Realize other modification.Therefore under the universal limited without departing substantially from claim and equivalency range, the present invention is not limited
In specific details and shown here as the legend with description.
Claims (9)
1. a kind of Foucault pendulum apparatus for demonstrating, it is characterised in that include：
Single pendulum, it has cycloid and swing ball, and described cycloid one end is fixed, other end connection swing ball, and the cycle of the single pendulum is T；
Permanent magnet, it is arranged on swing ball；
Optoelectronic switch, it is used to detect whether top has swing ball to pass through, when swing ball passes through, the transmitting terminal of optoelectronic switch and reception
The strong and weak change of light between end is converted into the change of electric current；
PLC, it is used to receive the electric signal of optoelectronic switch, and produces corresponding control instruction；
Relay, it is used to receive the control instruction of PLC power on/off, and makes corresponding action；
Solenoid, its on/off is controlled by above-mentioned relay, for attracting the permanent magnet on swing ball, for swing ball compensation is provided
Power；
Power supply, it provides electric energy for above-mentioned each electric elements；
Wherein, when being designated as 0 when the swing ball of single pendulum is by minimum point, after the 0.5T times are slightly less than, relay closure 0.1-
Disconnect again after 0.3s.
2. Foucault pendulum apparatus for demonstrating as claimed in claim 1, it is characterised in that the cycloid fixes silk and swing ball by first
It is connected.
3. Foucault pendulum apparatus for demonstrating as claimed in claim 2, it is characterised in that described first to fix silk be in cone, circular cone
Body bottom surface middle part extends outward threaded post, through hole is opened up in threaded post and extends to circular cone in vitro, centripetal on the swing ball
The first screwed hole is opened up, the threaded post of the first fixation silk is inserted into fixing cycloid and screws in the first screwed hole.
4. Foucault pendulum apparatus for demonstrating as claimed in claim 3, it is characterised in that the permanent magnet is annular shape, and by the
Two fixation silks are connected with swing ball.
5. Foucault pendulum apparatus for demonstrating as claimed in claim 4, it is characterised in that described second to fix silk be in cone, circular cone
Body bottom surface middle part extends outward threaded post, and centripetal on the swing ball to open up the second screwed hole, described second fixes the screw thread of silk
Permanent magnet is socketed on post and is screwed in the second screwed hole.
6. Foucault pendulum apparatus for demonstrating as claimed in claim 5, it is characterised in that first screwed hole and the second screwed hole phase
It is symmetrical to the swing ball centre of sphere.
7. Foucault pendulum apparatus for demonstrating as claimed in claim 1, it is characterised in that the solenoid is wrapped in outside optoelectronic switch
Week.
8. Foucault pendulum apparatus for demonstrating as claimed in claim 7, it is characterised in that the solenoid and optoelectronic switch are located at pendulum
Position directly below when ball is naturally drooped.
9. Foucault pendulum apparatus for demonstrating as claimed in claim 8, it is characterised in that the solenoid and optoelectronic switch are arranged on
In base, Base edge is provided with one week guardrail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710124161.5A CN106652679A (en) | 2017-03-03 | 2017-03-03 | Foucault pendulum demonstration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710124161.5A CN106652679A (en) | 2017-03-03 | 2017-03-03 | Foucault pendulum demonstration device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106652679A true CN106652679A (en) | 2017-05-10 |
Family
ID=58846927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710124161.5A Pending CN106652679A (en) | 2017-03-03 | 2017-03-03 | Foucault pendulum demonstration device |
Country Status (1)
| Country | Link |
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| CN (1) | CN106652679A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108693563A (en) * | 2018-07-12 | 2018-10-23 | 湖南科众兄弟科技有限公司 | Resonant mode absolute gravity measurement device |
| CN109166415A (en) * | 2018-06-26 | 2019-01-08 | 南京邮电大学 | A kind of Foucault pendulum motion trail analysis device and its working method |
| CN109509390A (en) * | 2018-11-29 | 2019-03-22 | 合肥磐石自动化科技有限公司 | A kind of Foucault pendulum apparatus for demonstrating |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2249937Y (en) * | 1995-10-13 | 1997-03-19 | 符浩 | Energy compensator for Foucault pendulum |
| CN2598067Y (en) * | 2002-04-04 | 2004-01-07 | 绍兴市第一中学 | Micro Foucault pendulum |
| CN103559818A (en) * | 2013-10-21 | 2014-02-05 | 沈阳建筑大学 | Direct-current weak current compensation Foucault pendulum experiment instrument |
| CN205080798U (en) * | 2015-11-05 | 2016-03-09 | 王春蕾 | Junior high school mathematics teaching demonstration apparatus |
-
2017
- 2017-03-03 CN CN201710124161.5A patent/CN106652679A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2249937Y (en) * | 1995-10-13 | 1997-03-19 | 符浩 | Energy compensator for Foucault pendulum |
| CN2598067Y (en) * | 2002-04-04 | 2004-01-07 | 绍兴市第一中学 | Micro Foucault pendulum |
| CN103559818A (en) * | 2013-10-21 | 2014-02-05 | 沈阳建筑大学 | Direct-current weak current compensation Foucault pendulum experiment instrument |
| CN205080798U (en) * | 2015-11-05 | 2016-03-09 | 王春蕾 | Junior high school mathematics teaching demonstration apparatus |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109166415A (en) * | 2018-06-26 | 2019-01-08 | 南京邮电大学 | A kind of Foucault pendulum motion trail analysis device and its working method |
| CN108693563A (en) * | 2018-07-12 | 2018-10-23 | 湖南科众兄弟科技有限公司 | Resonant mode absolute gravity measurement device |
| CN109509390A (en) * | 2018-11-29 | 2019-03-22 | 合肥磐石自动化科技有限公司 | A kind of Foucault pendulum apparatus for demonstrating |
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Application publication date: 20170510 |