CN109594496A - A kind of distribution microwave radar complexity vehicle is anti-to pound system and method - Google Patents
A kind of distribution microwave radar complexity vehicle is anti-to pound system and method Download PDFInfo
- Publication number
- CN109594496A CN109594496A CN201811505487.3A CN201811505487A CN109594496A CN 109594496 A CN109594496 A CN 109594496A CN 201811505487 A CN201811505487 A CN 201811505487A CN 109594496 A CN109594496 A CN 109594496A
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- Prior art keywords
- radar
- signal
- vehicle
- electromagnetic wave
- complexity
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F13/00—Arrangements for obstructing or restricting traffic, e.g. gates, barricades ; Preventing passage of vehicles of selected category or dimensions
- E01F13/04—Arrangements for obstructing or restricting traffic, e.g. gates, barricades ; Preventing passage of vehicles of selected category or dimensions movable to allow or prevent passage
- E01F13/06—Arrangements for obstructing or restricting traffic, e.g. gates, barricades ; Preventing passage of vehicles of selected category or dimensions movable to allow or prevent passage by swinging into open position about a vertical or horizontal axis parallel to the road direction, i.e. swinging gates
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
Abstract
The invention discloses a kind of distributed microwave radar complexity vehicles to prevent pounding system, including radar central control system, radar transmitter, transmitting antenna, receiving antenna, radar receiver, signal sampling unit, signal processing unit and gate control unit；Radar transmitter passes through transmitting antenna electromagnetic signals；Radar receiver receives the electromagnetic wave signal being reflected back by receiving antenna；Signal processing unit is mixed the electromagnetic wave signal received and local oscillation signal to obtain intermediate-freuqncy signal；Signal sampling cell pairs frequency signal carries out sampling and algorithm process to extract the distance of detected object, realizes the accurate positioning to detected object；Radar central control system realizes the lifting of gate railing according to the information control gate control unit received.
Description
Technical field
The present invention relates to field of security technologies, and in particular to a kind of distribution microwave radar complexity vehicle is anti-to pound system and side
Method.
Background technique
With the development of material flow industry, expressway carrying trade is developed on an unprecedented scale, and haulage vehicle type is varied, including
The complexity vehicle such as jubilee wagen, large-sized truck, towed vehicle, double-decker, it is low that vehicle chassis has height to have, different.High speed road car
Needed when entering and leaving high speed crossing by charge bayonet, general charge station using gate, fall railing and realize a vehicle
One bar incudes vehicle using ground induction coil inbuilt below railing.But since ground induction coil detects height and radius
Size is related, and when vehicle chassis is higher, ground induction coil can not detect information of vehicles, and ground induction coil is contained by incuding iron
Amount realizes vehicle detection, can not incude when pedestrian passes through.Due to above, often there is gate railing and pounds in expressway charge mouth
Vehicle and people's phenomenon is pounded, and can not achieve the ETC charging mode of complicated vehicle lorry.
Summary of the invention
The purpose of the present invention is to provide a kind of distributed microwave radar complexity vehicles to prevent pounding system and method, to prevent
When complicated vehicle and pedestrian pass through expressway charge mouth by gate railing pound to.
To achieve the above object, the technical solution of the present invention is as follows:
A kind of distribution microwave radar complexity vehicle is anti-to pound system, including radar central control system, radar transmitter, transmitting day
Line, receiving antenna, radar receiver, signal sampling unit, signal processing unit and gate control unit；
The radar transmitter, for passing through the transmitting antenna electromagnetic signals；
The radar receiver, for receiving the electromagnetic wave signal being reflected back by the receiving antenna；
The signal processing unit obtains intermediate frequency letter for the electromagnetic wave signal received and local oscillation signal to be mixed
Number；
The signal sampling unit, for carrying out sampling and algorithm process to the intermediate-freuqncy signal to extract detected pair
The distance of elephant realizes the accurate positioning to detected object；
The radar central control system, for realizing the liter of gate railing according to the information control gate control unit received
Drop.
Preferably, including at least two radars；Radar installation up and down in the vertical direction, be respectively used to from upside and
Detected object is detected downside.
Preferably, the radar central control system includes phase-locked loop pll, voltage controlled oscillator VCO and with reference to crystal oscillator；
The radar central control system sends analog signal by phase-locked loop pll and controls voltage controlled oscillator VCO to export electromagnetism
Wave signal；
The electromagnetic wave signal sent forms closed loop school by input phase-locked loop pll after frequency dividing and with reference to crystal oscillation signal
Just.
Preferably, the electromagnetic wave signal of transmission is zig-zag or triangle-wave modulation signal.
Preferably, the transmitting antenna is box horn or micro-strip array antenna.
Preferably, the rising edge of the zig-zag or triangle-wave modulation signal is:
Wherein vT(t) electromagnetic wave signal emitted changes with time；π indicates pi, value 3.1415926；f0It indicates
The initial frequency of the electromagnetic wave signal of transmitting commonly uses 5.8GHz and 24GHz；B indicates the bandwidth of the electromagnetic wave signal of transmitting, bandwidth
Determine the distance resolution of radar；T indicates the frequency sweep cycle of the electromagnetic wave signal of transmitting；Indicate the electromagnetic wave signal of transmitting
Initial phase.
Preferably, the energy value of the reflected electromagnetic wave received using receiving antenna carries out detected object
It distinguishes.
Preferably, the echo-signal that radar receiver receives are as follows:
Wherein,For echo-signal time delay, c is the light velocity 3 × 108m/s；
In being mixed to obtain with local oscillation signal in radar receiver using the electromagnetic wave signal of transmitting as local oscillation signal
Frequency signal: v1(t)=cos [2 π f0td+2πtd·t·B/T-πKtd 2] (3)。
Preferably, intermediate-freuqncy signal delay high-order term π Kt is omitted in formula (3)d 2, the frequency for obtaining intermediate-freuqncy signal is td·B/
The frequency F of formula (3) is calculated by Fourier transformation (FFT) by T, realizes the estimation for the R that adjusts the distance
A kind of distribution microwave radar complexity vehicle is anti-to pound method, prevents pounding for the distributed microwave radar complexity vehicle
System, comprising steps of
Step 1: System self-test；
Step 2: fault alarm is carried out if if System self-test；
Step 3: if System self-test passes through, having detected whether vehicle and pedestrian；
Step 4: if there is vehicle or pedestrian pass through, then radar central control system sends to gate control unit and orders, institute
It states gate control unit and sends 485 control signals to gate；
Step 5: the gate receives signal rise railing and then puts down railing after people or vehicle pass through；
Step 6: having detected whether that vehicle or pedestrian pass through during putting down railing；If there is pedestrian or vehicle are logical
It crosses, then goes to step 3.
The present invention has the advantage that
(1) present invention can substitute expressway charge mouth ground induction coil and prevent pounding function, easy for installation, not need to dig geosyncline,
Save the time；
(2) distributed radar of the present invention layout can solve ground induction coil as vehicle vehicle it is complicated caused by pound vehicle existing
As；
(3) the case where present invention can prevent barrier gate device whereabouts from pounding pedestrian appearance；
(4) present invention can also record vehicle and enter and leave quantity, count foundation as expressway charge；
(5) present invention can promote lorry ETC, and lorry can greatly reduce the time that lorry enters and leaves high speed using ETC；
(6) round-the-clock non-stop run in 24 hours may be implemented in the present invention, has preferable anti-rain, mist, dust etc. severe
Environmental performance.
Detailed description of the invention
Fig. 1 is the anti-functional block diagram for pounding system of distributed microwave radar complexity vehicle of invention.
Fig. 2 is the distributed anti-work flow diagram for pounding system of microwave radar complexity vehicle in invention.
Fig. 3 is distributed radar scheme of installation in invention.
Specific embodiment
The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention..
Embodiment 1
Distributed microwave radar complexity vehicle of the invention is anti-to pound system, including radar central control system, radar transmitter, hair
Penetrate antenna, receiving antenna, radar receiver, signal sampling unit, signal processing unit and gate control unit；
The radar transmitter, for passing through the transmitting antenna electromagnetic signals；
The radar receiver, for receiving the electromagnetic wave signal being reflected back by the receiving antenna；
The signal processing unit obtains intermediate frequency letter for the electromagnetic wave signal received and local oscillation signal to be mixed
Number；
The signal sampling unit, for carrying out sampling and algorithm process to the intermediate-freuqncy signal to extract detected pair
The distance of elephant realizes the accurate positioning to detected object；
The radar central control system, for realizing the liter of gate railing according to the information control gate control unit received
Drop.
Firstly, being directed to, highway vehicle has the characteristics that vehicle type mostly and structure is complicated, and the system is using distributed peace
Fill microwave radar sensor.Secondly, more radars of distributed installation detect below gate railing whether have vehicle or row respectively
People passes through.Again, it rises, fall as a result, controlling gate in conjunction with distributed radar detection, prevent the case where pounding vehicle or pedestrian hair
It is raw.Expressway charge mouth vehicular traffic can be counted by the number of single lifting lever.This system is easy for installation, accurately
Rate is high, and can greatly reduce due to vehicle complexity, and vehicle is pounded caused by ground induction coil missing inspection, pounds people's phenomenon, is easy to implement nobody
Change on duty, is advantageously implemented lorry ETC vehicle detection and anti-pounds.
The present invention can substitute expressway charge mouth ground induction coil and prevent pounding function, easy for installation, do not need to dig geosyncline, save
Time；Distributed radar layout of the present invention can solve ground induction coil and pound vehicle phenomenon as caused by vehicle vehicle complexity；This hair
Bright the case where can preventing barrier gate device whereabouts from pounding pedestrian appearance；The present invention can also record vehicle and enter and leave quantity, as high speed
Road charge statistics foundation；The present invention can promote lorry ETC, lorry using ETC can greatly reduce lorry enter and leave high speed when
Between；Round-the-clock non-stop run in 24 hours may be implemented in the present invention, has the adverse circumstances performances such as preferable anti-rain, mist, dust.
Including at least two radars；Radar installation up and down in the vertical direction, is respectively used to from the upper side and lower side pair
Detected object is detected.
The radar central control system includes phase-locked loop pll, voltage controlled oscillator VCO and with reference to crystal oscillator；System is controlled in the radar
System sends analog signal by phase-locked loop pll and controls voltage controlled oscillator VCO to export electromagnetic wave signal；The electromagnetic wave sent
Signal is formed by input phase-locked loop pll after frequency dividing with reference crystal oscillation signal closed-loop corrected.
The electromagnetic wave signal sent is zig-zag or triangle-wave modulation signal.
The transmitting antenna is box horn or micro-strip array antenna.
The rising edge of the zig-zag or triangle-wave modulation signal is:
Wherein vT(t) electromagnetic wave signal emitted changes with time；π indicates pi, value 3.1415926；f0Indicate hair
The initial frequency for the electromagnetic wave signal penetrated commonly uses 5.8GHz and 24GHz；B indicates that the bandwidth of the electromagnetic wave signal of transmitting, bandwidth are determined
The distance resolution of radar is determined；T indicates the frequency sweep cycle of the electromagnetic wave signal of transmitting；Indicate the electromagnetic wave signal of transmitting
Initial phase.
The energy value of its reflected electromagnetic wave received using receiving antenna distinguishes detected object.
The echo-signal that radar receiver receives are as follows:
Wherein,For echo-signal time delay, c is the light velocity 3 × 108m/s；
In being mixed to obtain with local oscillation signal in radar receiver using the electromagnetic wave signal of transmitting as local oscillation signal
Frequency signal: v1(t)=cos [2 π f0td+2πtd·t·B/T-πKtd 2] (3)。
Intermediate-freuqncy signal delay high-order term π Kt is omitted in formula (3)d 2, the frequency for obtaining intermediate-freuqncy signal is tdB/T passes through
The frequency F of formula (3) is calculated in Fourier transformation (FFT), realizes the estimation for the R that adjusts the distance
Distributed microwave radar complexity vehicle of the invention is anti-to pound method, for the distributed microwave radar complexity vehicle
It is anti-to pound system, comprising steps of
Step 1: System self-test；
Step 2: fault alarm is carried out if if System self-test；
Step 3: if System self-test passes through, having detected whether vehicle and pedestrian；
Step 4: if there is vehicle or pedestrian pass through, then radar central control system sends to gate control unit and orders, institute
It states gate control unit and sends 485 control signals to gate；
Step 5: the gate receives signal rise railing and then puts down railing after people or vehicle pass through；
Step 6: having detected whether that vehicle or pedestrian pass through during putting down railing；If there is pedestrian or vehicle are logical
It crosses, then goes to step 3.
Embodiment 2
In the present embodiment, providing a kind of anti-pound of distributed microwave radar complexity vehicle for expressway charge mouth is
System engineer application case.
In expressway, entrance installs distributed radar, and radar antenna electromagenetic wave radiation direction and vehicle heading are as far as possible
Vertically, radar is erected near barrier gate device, is divided into two distributed installations up and down, wherein being mounted on a following radar is the
One radar, mainly for detection of low profile vehicle, including car, truck chassis part and towed vehicle trailer connector；It is mounted on
One radar in face is the second radar, primarily to the detection higher vehicle in chassis, when preventing vehicle chassis excessively high, the first thunder
Vehicle accident is pounded up to caused by failing to detect.First radar mounting height suggestion is 0.4m~0.8m, the second radar mounting height
It is recommended that being 1.2m~1.8m, height herein is for ground.
After installation fixes, radar output control unit is connected on gate, radar system is powered on later.Radar hair
The sawtooth wave penetrated passes through aerial radiation into air dielectric, in air with light velocity propagation, when encountering target reflection, electromagnetic wave
Different, the energy different from of reflection according to the reflection coefficient of reflectance target.
The echo of reflection is received antenna and is received, and is then mixed to obtain intermediate-freuqncy signal with local oscillation signal, in
The frequency of frequency signal is estimated that the distance of target；According to the distance value and backward energy value for calculating target, distribution peace
The radar up and down of dress all detects vehicles or pedestrians, or wherein one when detecting vehicles or pedestrians, it is believed that under gate railing
There is target in side, cannot fall bar, all without thinking vehicles or pedestrians when target below distributed radar detection to gate railing
It has been moved off, bar can be fallen.
Radar is risen and fallen by voltage signal or 485 signals output control gate railing, is realized that vehicle is crossed and is fallen bar, falls bar process
In can argue for the sake of arguing automatically when thering is vehicle to drive into anti-pound.
This hair system for expressway entrance complexity vehicle and pedestrian it is anti-pound with it is easy for installation, high-efficient, anti-pound people,
Information unambiguously the advantages of, can be used for the fields such as expressway access management, traffic, security protection.
Existing ETC generally only handles pony car and jubilee wagen, cannot handle large-sized truck, towed vehicle, double-decker etc.
Complicated vehicle, is not able to satisfy the detection of complicated vehicle just because of ground induction coil, and distributed radar system provided by the invention
It can be very good to detect various complicated vehicles, handle ETC for complicated vehicle and provide a strong guarantee, and can whole nation popularization.
Although above having used general explanation and specific embodiment, the present invention is described in detail, at this
On the basis of invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Therefore,
These modifications or improvements without departing from theon the basis of the spirit of the present invention are fallen within the scope of the claimed invention.
Claims (10)
1. a kind of distribution microwave radar complexity vehicle is anti-to pound system, which is characterized in that including radar central control system, radar emission
Machine, transmitting antenna, receiving antenna, radar receiver, signal sampling unit, signal processing unit and gate control unit；
The radar transmitter, for passing through the transmitting antenna electromagnetic signals；
The radar receiver, for receiving the electromagnetic wave signal being reflected back by the receiving antenna；
The signal processing unit, for being mixed the electromagnetic wave signal received and local oscillation signal to obtain intermediate-freuqncy signal；
The signal sampling unit, for carrying out sampling and algorithm process to the intermediate-freuqncy signal to extract detected object
Distance realizes the accurate positioning to detected object；
The radar central control system, for realizing the lifting of gate railing according to the information control gate control unit received.
2. distributed microwave radar complexity vehicle is anti-according to claim 1 pounds system, which is characterized in that including at least two
Radar；Radar installation up and down in the vertical direction, is respectively used to detect detected object from the upper side and lower side.
3. distributed microwave radar complexity vehicle is anti-according to claim 2 pounds system, which is characterized in that controlled in the radar
System includes phase-locked loop pll, voltage controlled oscillator VCO and with reference to crystal oscillator；
The radar central control system sends analog signal by phase-locked loop pll and controls voltage controlled oscillator VCO to export electromagnetic wave letter
Number；
The electromagnetic wave signal sent is formed by input phase-locked loop pll after frequency dividing with reference crystal oscillation signal closed-loop corrected.
4. distributed microwave radar complexity vehicle is anti-according to claim 3 pounds system, which is characterized in that the electricity of transmission
Magnetostatic wave signal is zig-zag or triangle-wave modulation signal.
5. distributed microwave radar complexity vehicle is anti-according to claim 4 pounds system, which is characterized in that the transmitting antenna
It is box horn or micro-strip array antenna.
6. distributed microwave radar complexity vehicle is anti-according to claim 5 pounds system, which is characterized in that the zig-zag
Or the rising edge of triangle-wave modulation signal is:
Wherein vT(t) electromagnetic wave signal emitted changes with time；π indicates pi, value 3.1415926；f0Indicate transmitting
Electromagnetic wave signal initial frequency, commonly use 5.8GHz and 24GHz；B indicates that the bandwidth of the electromagnetic wave signal of transmitting, bandwidth determine
The distance resolution of radar；T indicates the frequency sweep cycle of the electromagnetic wave signal of transmitting；Indicate the first of the electromagnetic wave signal of transmitting
Beginning phase.
7. distributed microwave radar complexity vehicle is anti-according to claim 6 pounds system, which is characterized in that it utilizes reception day
The energy value for the reflected electromagnetic wave that line receives distinguishes detected object.
8. distributed microwave radar complexity vehicle is anti-according to claim 7 pounds system, which is characterized in that radar receiver connects
The echo-signal received are as follows:
Wherein,For echo-signal time delay, c is the light velocity 3 × 108m/s；
It is mixed to obtain intermediate frequency letter with local oscillation signal in radar receiver using the electromagnetic wave signal of transmitting as local oscillation signal
Number: v1(t)=cos [2 π f0td+2πtd·t·B/T-πKtd 2] (3)。
9. distributed microwave radar complexity vehicle is anti-according to claim 8 pounds system, which is characterized in that saved in formula (3)
Slightly intermediate-freuqncy signal delay high-order term π Ktd 2, the frequency for obtaining intermediate-freuqncy signal is tdB/T is calculated by Fourier transformation (FFT)
The frequency F of formula (3) is obtained, realizes the estimation for the R that adjusts the distance
10. a kind of distribution microwave radar complexity vehicle is anti-to pound method, complicated for distribution microwave radar described in claim 9
Vehicle is anti-to pound system, which is characterized in that comprising steps of
Step 1: System self-test；
Step 2: fault alarm is carried out if if System self-test；
Step 3: if System self-test passes through, having detected whether vehicle and pedestrian；
Step 4: if there is vehicle or pedestrian pass through, then radar central control system sends to gate control unit and orders, the lock
Machine control unit sends 485 control signals to gate；
Step 5: the gate receives signal rise railing and then puts down railing after people or vehicle pass through；
Step 6: having detected whether that vehicle or pedestrian pass through during putting down railing；If there is pedestrian or vehicle pass through,
Then go to step 3.
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| CN201811505487.3A CN109594496A (en) | 2018-12-10 | 2018-12-10 | A kind of distribution microwave radar complexity vehicle is anti-to pound system and method |
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| CN201811505487.3A CN109594496A (en) | 2018-12-10 | 2018-12-10 | A kind of distribution microwave radar complexity vehicle is anti-to pound system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117111049A (en) * | 2023-10-23 | 2023-11-24 | 成都瑞达物联科技有限公司 | ETC channel vehicle presence detection method and system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4156874A (en) * | 1977-11-21 | 1979-05-29 | Kopis Floyd B | Anti-collision vehicle radar system |
| EP0690315B1 (en) * | 1994-07-01 | 2001-12-05 | Raytheon Company | RF sensor and radar for automotive speed and collision avoidance applications |
| CN201795996U (en) * | 2010-03-05 | 2011-04-13 | 河南高速公路发展有限责任公司 | Radar detecting device for vehicle on highway green channel |
| CN102707266A (en) * | 2012-05-24 | 2012-10-03 | 北京理工大学 | Radar with anti-interference and multi-target identification functions and detection method thereof |
| CN102798863A (en) * | 2012-07-04 | 2012-11-28 | 西安电子科技大学 | Road central isolation belt detection method based on automobile anti-collision radar |
| CN106054192A (en) * | 2016-05-20 | 2016-10-26 | 北京华航无线电测量研究所 | Automobile crashproof millimeter wave radar system |
| CN108230502A (en) * | 2017-12-29 | 2018-06-29 | 小儒技术（深圳）有限公司 | A kind of banister control method and its equipment, storage medium, electronic equipment |
-
2018
- 2018-12-10 CN CN201811505487.3A patent/CN109594496A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4156874A (en) * | 1977-11-21 | 1979-05-29 | Kopis Floyd B | Anti-collision vehicle radar system |
| EP0690315B1 (en) * | 1994-07-01 | 2001-12-05 | Raytheon Company | RF sensor and radar for automotive speed and collision avoidance applications |
| CN201795996U (en) * | 2010-03-05 | 2011-04-13 | 河南高速公路发展有限责任公司 | Radar detecting device for vehicle on highway green channel |
| CN102707266A (en) * | 2012-05-24 | 2012-10-03 | 北京理工大学 | Radar with anti-interference and multi-target identification functions and detection method thereof |
| CN102798863A (en) * | 2012-07-04 | 2012-11-28 | 西安电子科技大学 | Road central isolation belt detection method based on automobile anti-collision radar |
| CN106054192A (en) * | 2016-05-20 | 2016-10-26 | 北京华航无线电测量研究所 | Automobile crashproof millimeter wave radar system |
| CN108230502A (en) * | 2017-12-29 | 2018-06-29 | 小儒技术（深圳）有限公司 | A kind of banister control method and its equipment, storage medium, electronic equipment |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117111049A (en) * | 2023-10-23 | 2023-11-24 | 成都瑞达物联科技有限公司 | ETC channel vehicle presence detection method and system |
| CN117111049B (en) * | 2023-10-23 | 2024-01-30 | 成都瑞达物联科技有限公司 | ETC channel vehicle presence detection method and system |
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Application publication date: 20190409 |