CN111613033A - Intelligent vehicle-mounted silent alarm and alarm method - Google Patents
Intelligent vehicle-mounted silent alarm and alarm method Download PDFInfo
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- CN111613033A CN111613033A CN202010385409.5A CN202010385409A CN111613033A CN 111613033 A CN111613033 A CN 111613033A CN 202010385409 A CN202010385409 A CN 202010385409A CN 111613033 A CN111613033 A CN 111613033A
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
- G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
- G08B25/10—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using wireless transmission systems
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- 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
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
- G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/42—Determining position
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/0297—Robbery alarms, e.g. hold-up alarms, bag snatching alarms
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L15/00—Speech recognition
- G10L15/22—Procedures used during a speech recognition process, e.g. man-machine dialogue
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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Abstract
The application discloses an intelligent vehicle-mounted silent alarm and an alarm method. The alarm includes: the system comprises a Bluetooth emitter, a Bluetooth scanning module, a voice recognition module, a communication module, a positioning module, a recording module and an acceleration sensor module; and the main control module starts the recording function of the voice recognition module when receiving the first alarm signal sent by the Bluetooth scanning module or receiving the second alarm signal sent by the voice recognition module, extracts the recording record from the voice recognition module in real time, extracts the positioning information from the positioning module in real time, sends the recording record and the positioning information to the communication module, and then transmits the recording record and the positioning information to the monitoring background by the communication module. The method and the device solve the problem of how to effectively alarm when the personal property of a driver is threatened in the related technology, and the alarm process is finished in a silent and silent mode; the driver can complete the help seeking process without contacting any equipment; the alarm has low cost and long standby time.
Description
Technical Field
The application relates to the field of communication technology and sensing technology application, in particular to an intelligent vehicle-mounted silent alarm and an alarm method.
Background
According to the statistics of the Ministry of public Security, 3214 thousands of motor vehicles are newly registered in 2019 nationwide, the quantity of motor vehicles is up to 3.48 hundred million, 2578 thousands of automobiles are newly registered, and the quantity of automobiles is up to 2.6 hundred million; automobile drivers reach 4.35 million people, with automobile drivers 3.97 million people.
Along with the increase of the number of drivers, illegal damages suffered by the drivers are more and more, official statistical results do not exist at present, but 241 thousands of results and 1380 thousands of results appear when 'private car is robbed' and 'taxi is robbed' are searched according to a hundred degree, so that the number of damages suffered by the drivers is huge, and especially taxies are more serious.
At present, a part of taxi companies are provided with one-key alarm equipment in taxis, but in practical use, drivers have no chance to alarm under the edge force of lawless persons, and even if the drivers have a chance to touch keys, the suspicion of criminals can be caused. In these systems, the backstage staff still can call for the driver to confirm for the prevention false alarm, and this often can further irritate criminals, increases driver's danger.
However, there is no good safety protection scheme in private cars at present, the only communication tool is a mobile phone, but when danger is encountered, the private car owner has no chance to dial the mobile phone at all.
Aiming at the problem of how to give an alarm when the personal and property of a driver are threatened in the related technology, an effective solution is not provided at present.
Disclosure of Invention
The application mainly aims to provide an intelligent vehicle-mounted silent alarm and an alarm method, so as to solve the problem of how to effectively and safely alarm when the personal property of a driver is threatened in the related technology.
In order to achieve the above object, in a first aspect, the present application provides an intelligent vehicle-mounted silent alarm.
The intelligent vehicle-mounted silence alarm comprises a Bluetooth emitter, a Bluetooth scanning module, a voice recognition module, a communication module, a positioning module and an acceleration sensor module;
the Bluetooth scanning module receives signals sent by the Bluetooth transmitter and is connected with the main control module, the voice recognition module is connected with the main control module, and the main control module is respectively connected with the communication module, the positioning module and the acceleration sensor.
The Bluetooth emitter is used for transmitting a signal sent out when the Bluetooth emitter is touched to the Bluetooth detection module, and at least one Bluetooth emitter is adopted and is arranged at any place in the vehicle;
the Bluetooth scanning module is used for receiving a first alarm signal sent by the Bluetooth transmitter and transmitting the first alarm signal to the main control module;
the voice recognition module has a recording function and a voice recognition function, can recognize words spoken by a driver, and generates a second alarm signal and sends the second alarm signal to the main control module when the words spoken by the driver contain predefined keywords;
the main control module is used for coordinating all the modules to complete an alarm function;
the communication module transmits various information sent by the main control module to a monitoring background;
the positioning module is used for positioning the specific position of the vehicle in real time and sending the specific position of the vehicle to the main control module according to the requirement of the main control module;
and the acceleration sensor is used for judging whether the vehicle is in motion or not and transmitting a vehicle acceleration signal to the main control module.
The main control module is used for starting a recording function of the voice recognition module when receiving a first alarm signal sent by the Bluetooth scanning module or receiving a second alarm signal sent by the voice recognition module, extracting a recording record from the voice recognition module in real time, extracting positioning information from the positioning module in real time, and sending the recording record and the positioning information to the communication module.
The communication module preferably adopts an LTE Cat 1 or NBIOT module.
The acceleration sensor adopts a three-axis acceleration sensor.
The main control module receives the vehicle acceleration signal transmitted by the acceleration sensor, stops the positioning module when the vehicle acceleration signal indicates that the vehicle is static, and can adjust the reporting period of the positioning module according to the speed of the movement of the vehicle when the vehicle acceleration signal indicates that the vehicle moves, wherein the one-to-one correspondence relationship between the vehicle acceleration signal and the reporting period of the positioning module is preset in the main control module.
The reporting period refers to a time interval for the main control module to start the positioning module and read data.
The predefined keyword is pre-stored in the main control module, the voice recognition module compares the recognized words spoken by the driver with the predefined keyword, and when the comparison result is consistent, the voice recognition module sends a second alarm signal to the main control module.
The positioning module adopts a GPS positioning module or a Beidou positioning module.
In a second aspect, the application further provides an intelligent vehicle-mounted silent alarm method, which is applied to the intelligent vehicle-mounted silent alarm.
In the embodiment of the application, an intelligent vehicle-mounted silent alarm method is provided, and the specific flow is as follows:
step S1: the main control module starts the Bluetooth scanning module, the voice recognition module, the positioning module and the acceleration sensor;
step S2: the main control module receives the vehicle acceleration signal transmitted by the acceleration sensor, stops the positioning module when the vehicle acceleration signal indicates that the vehicle is static, and can adjust the reporting period of the positioning module according to the speed of the vehicle when the vehicle acceleration signal indicates that the vehicle moves, and the one-to-one correspondence relationship between the vehicle acceleration signal and the reporting period of the positioning module is preset in the main control module.
Step S3: when the Bluetooth scanning module scans a first alarm signal sent by the Bluetooth transmitter, the Bluetooth scanning module transmits the first alarm signal to the main control module; when the voice recognition module recognizes that the words spoken by the driver comprise the predefined keywords, the voice recognition module sends a second alarm signal to the main control module;
step S4: the main control module starts a recording function of the voice recognition module when receiving a first alarm signal sent by the Bluetooth scanning module or receiving a second alarm signal sent by the voice recognition module, extracts a recording record from the voice recognition module in real time, extracts positioning information from the positioning module in real time, and sends the recording record and the positioning information to the communication module;
step S5: the communication module is used for sending the recording record and the positioning information to the monitoring background;
monitoring background staff judge whether the driver is stressed according to the voice record and the positioning information, if the driver is stressed, the staff gives an alarm to the driver, otherwise, the staff does not give an alarm to the driver.
The beneficial technical effects are as follows:
in the application, all the alarming processes are finished in the silent and silent state, and the alarming equipment cannot make any sound; the driver can finish the help seeking process without contacting any equipment, thereby effectively avoiding further damage of lawless persons to the driver; meanwhile, monitoring background staff can confirm whether the driver is in danger or not without seeking evidence from the driver, so that the safety of the driver is protected, and the waste of police strength caused by some false alarms is avoided; the alarm that this application realized is with low costs, and standby time is long.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and their description illustrate the embodiments of the invention and do not limit it. In the drawings:
fig. 1 is a block diagram of an intelligent vehicle-mounted silent alarm system provided according to an embodiment of the present application;
fig. 2 is a flowchart of an intelligent vehicle-mounted silent alarm method provided in an embodiment of the present application.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
In addition, the term "plurality" shall mean two as well as more than two.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The alarm is designed by combining the latest sensor technology and communication technology and utilizing the perfect flow, is hidden in the automobile, receives the alarm information of a driver by multiple methods, and informs monitoring background workers, and the monitoring background workers can obtain the position of the automobile and the condition in the automobile at the first time.
In a first aspect, the application provides an intelligent vehicle-mounted silent alarm.
According to the on-vehicle silence alarm of intelligence of this application, as shown in FIG. 1, include: the system comprises a Bluetooth emitter, a Bluetooth scanning module, a voice recognition module, a communication module, a positioning module and an acceleration sensor module;
the Bluetooth scanning module receives signals sent by the Bluetooth transmitter and is connected with the main control module, the voice recognition module is connected with the main control module, and the main control module is respectively connected with the communication module, the positioning module and the acceleration sensor.
The Bluetooth transmitter at least adopts one Bluetooth transmitter and is arranged at any place in the vehicle; the Bluetooth emitter can be arranged in any hidden place in the vehicle, even in a wallet of a driver, and can be triggered when the driver hands over belongings under the coercion of lawbreakers, and the Bluetooth emitter sends a signal and then is scanned by the Bluetooth scanning module.
The Bluetooth scanning module is used for receiving a first alarm signal sent by the Bluetooth transmitter and transmitting the first alarm signal to the main control module;
the voice recognition module has a recording function and a voice recognition function, can recognize words spoken by a driver, and generates a second alarm signal and sends the second alarm signal to the main control module when the words spoken by the driver contain predefined keywords;
if the driver has no chance to touch the Bluetooth transmitter at all, the driver can include some predefined keywords in the conversation with lawbreakers after the driver is calmed down, such as 'car and money', 'I am out', etc., so that the voice recognition module can judge that the driver is at risk currently by means of the keywords, and then trigger an alarm;
the main control module is used for coordinating all the modules to complete an alarm function;
the communication module transmits various information sent by the main control module to a monitoring background;
the positioning module is used for positioning the specific position of the vehicle in real time and sending the specific position of the vehicle to the main control module according to the requirement of the main control module;
and the acceleration sensor is used for judging whether the vehicle is in motion or not and transmitting a vehicle acceleration signal to the main control module.
The main control module is used for starting a recording function of the voice recognition module when receiving a first alarm signal sent by the Bluetooth scanning module or receiving a second alarm signal sent by the voice recognition module, extracting a recording record from the voice recognition module in real time, extracting positioning information from the positioning module in real time, and sending the recording record and the positioning information to the communication module.
The communication module preferably adopts an LTE Cat 1 or NBIOT module.
Compared with a common 4G module, the LTE Cat 1 or NBIOT module is low in power consumption, so that the power supply module can work for more than one week without being connected with a power supply, and the advantage of long standby time is achieved. Theoretically, the communication module can also adopt the traditional 2G, 3G and 4G module, but at present, the 2G and 3G network is in the process of gradually quitting the network, and the coverage in the future will be more and more difficult. The common 4G module has high communication speed, but has high cost and large power consumption, and is not suitable for the application of the alarm.
The acceleration sensor adopts a three-axis acceleration sensor.
The main control module receives the vehicle acceleration signal transmitted by the acceleration sensor, stops the positioning module when the vehicle acceleration signal indicates that the vehicle is static, so as to save electric quantity, and can adjust the reporting period of the positioning module according to the speed of the vehicle movement when the vehicle acceleration signal indicates that the vehicle moves, and the one-to-one correspondence relationship between the vehicle acceleration signal and the reporting period of the positioning module is preset in the main control module.
The predefined keyword is pre-stored in the main control module, the voice recognition module compares the recognized words spoken by the driver with the predefined keyword, and when the comparison result is consistent, the voice recognition module sends a second alarm signal to the main control module.
The positioning module preferably adopts a GPS positioning module or a Beidou positioning module.
In the communication module, various information sent by the main control module includes: the positioning information extracted from the positioning module by the main control module and the recording record extracted from the voice recognition module by the main control module.
In a second aspect, the application further provides an intelligent vehicle-mounted silent alarm method, which is applied to the intelligent vehicle-mounted silent alarm.
In the embodiment of the present application, an intelligent vehicle-mounted silent alarm method is provided, as shown in fig. 2, the specific flow is as follows:
step S1: the main control module starts the Bluetooth scanning module, the voice recognition module, the positioning module and the acceleration sensor;
step S2: the main control module receives the vehicle acceleration signal transmitted by the acceleration sensor, stops the positioning module when the vehicle acceleration signal indicates that the vehicle is static, and can adjust the reporting period of the positioning module according to the speed of the vehicle when the vehicle acceleration signal indicates that the vehicle moves, and the one-to-one correspondence relationship between the vehicle acceleration signal and the reporting period of the positioning module is preset in the main control module.
The reporting period refers to a time interval for the main control module to start the positioning module and read data.
Step S3: when the Bluetooth scanning module scans first alarm information sent by the Bluetooth emitter, the Bluetooth scanning module transmits a first alarm signal to the main control module; when the voice recognition module recognizes that the words spoken by the driver comprise the predefined keywords, the voice recognition module sends a second alarm signal to the main control module;
step S4: the main control module starts a recording function of the voice recognition module when receiving a first alarm signal sent by the Bluetooth scanning module or receiving a second alarm signal sent by the voice recognition module, extracts a recording record from the voice recognition module in real time, extracts positioning information from the positioning module in real time, and sends the recording record and the positioning information to the communication module;
step S5: the communication module is used for sending the recording record and the positioning information to the monitoring background;
monitoring background staff judge whether the driver is stressed according to the voice record and the positioning information, if the driver is stressed, the staff gives an alarm to the driver, otherwise, the staff does not give an alarm to the driver.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. An intelligent vehicle-mounted silent alarm, comprising: the system comprises a Bluetooth emitter, a Bluetooth scanning module, a voice recognition module, a communication module, a positioning module and an acceleration sensor;
the Bluetooth scanning module receives a signal sent by the Bluetooth transmitter and is connected with the main control module, the voice recognition module is connected with the main control module, and the main control module is respectively connected with the communication module, the positioning module and the acceleration sensor;
the Bluetooth transmitter at least adopts one Bluetooth transmitter and is arranged at any place in the vehicle;
the Bluetooth scanning module is used for receiving a first alarm signal sent by the Bluetooth transmitter and transmitting the first alarm signal to the main control module;
the voice recognition module has a recording function and a voice recognition function, can recognize words spoken by a driver, and generates a second alarm signal and sends the second alarm signal to the main control module when the words spoken by the driver contain predefined keywords;
the main control module is used for coordinating all the modules to complete an alarm function;
the communication module transmits various information sent by the main control module to a monitoring background;
the positioning module is used for positioning the specific position of the vehicle in real time and sending the specific position of the vehicle to the main control module according to the requirement of the main control module;
and the acceleration sensor is used for judging whether the vehicle is in motion or not and transmitting a vehicle acceleration signal to the main control module.
2. The intelligent vehicle-mounted silence alarm of claim 1,
the main control module is used for starting a recording function of the voice recognition module when receiving a first alarm signal sent by the Bluetooth scanning module or receiving a second alarm signal sent by the voice recognition module, extracting a recording record from the voice recognition module in real time, extracting positioning information from the positioning module in real time, and sending the recording record and the positioning information to the communication module.
3. The intelligent vehicle-mounted silence alarm of claim 1 or 2,
the communication module adopts an LTE Cat 1 or NBIOT module.
4. The intelligent vehicle-mounted silence alarm of claim 1,
the acceleration sensor adopts a three-axis acceleration sensor.
5. The intelligent vehicle-mounted silence alarm of claim 1 or 2,
the main control module receives the vehicle acceleration signal transmitted by the acceleration sensor, stops the positioning module when the vehicle acceleration signal indicates that the vehicle is static, and can adjust the reporting period of the positioning module according to the speed of the movement of the vehicle when the vehicle acceleration signal indicates that the vehicle moves, wherein the one-to-one correspondence relationship between the vehicle acceleration signal and the reporting period of the positioning module is preset in the main control module.
6. The intelligent vehicle-mounted silence alarm of claim 1,
the predefined keyword is pre-stored in the main control module, the voice recognition module compares the recognized words spoken by the driver with the predefined keyword, and when the comparison result is consistent, the voice recognition module sends a second alarm signal to the main control module.
7. The intelligent vehicle-mounted silence alarm of claim 1,
the positioning module adopts a GPS positioning module or a Beidou positioning module.
8. An intelligent vehicle-mounted silent alarm method is applied to the intelligent vehicle-mounted silent alarm according to any one of claims 1 to 7, and the specific flow is as follows:
step S1: the main control module starts the Bluetooth scanning module, the voice recognition module, the positioning module and the acceleration sensor;
step S2: the main control module receives the vehicle acceleration signal transmitted by the acceleration sensor and adjusts the starting or stopping and reporting period of the positioning module according to the vehicle acceleration signal;
step S3: when the Bluetooth scanning module scans a first alarm signal sent by the Bluetooth transmitter, the Bluetooth scanning module transmits the first alarm signal to the main control module; when the voice recognition module recognizes that the words spoken by the driver comprise the predefined keywords, the voice recognition module sends a second alarm signal to the main control module;
step S4: the main control module starts a recording function of the voice recognition module when receiving a first alarm signal sent by the Bluetooth scanning module or receiving a second alarm signal sent by the voice recognition module, extracts a recording record from the voice recognition module in real time, extracts positioning information from the positioning module in real time, and sends the recording record and the positioning information to the communication module;
step S5: and the communication module is used for sending the recording record and the positioning information to the monitoring background.
9. The intelligent vehicle-mounted silent alarm method according to claim 8,
in step S2, the start or stop and report cycle of the positioning module is adjusted according to the vehicle acceleration signal, specifically: when the vehicle acceleration signal indicates that the vehicle is static, the main control module stops working of the positioning module, and when the vehicle acceleration signal indicates that the vehicle moves, the main control module can adjust the reporting period of the positioning module according to the speed of the vehicle moving, and the one-to-one correspondence relationship between the vehicle acceleration signal and the reporting period of the positioning module is preset in the main control module.
10. The intelligent vehicle-mounted silent alarm method according to claim 9,
the reporting period refers to a time interval for the main control module to start the positioning module and read data.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010385409.5A CN111613033A (en) | 2020-05-08 | 2020-05-08 | Intelligent vehicle-mounted silent alarm and alarm method |
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| CN202010385409.5A CN111613033A (en) | 2020-05-08 | 2020-05-08 | Intelligent vehicle-mounted silent alarm and alarm method |
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2020
- 2020-05-08 CN CN202010385409.5A patent/CN111613033A/en active Pending
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|---|---|---|---|---|
| CN102129078A (en) * | 2010-01-20 | 2011-07-20 | 厦门雅迅网络股份有限公司 | Method for uploading positioning data of vehicles |
| US20130276535A1 (en) * | 2010-11-17 | 2013-10-24 | Theodosios Kountotsis | System and method for performing chemical analysis of fingerprints for providing at least one response |
| CN203397478U (en) * | 2013-02-23 | 2014-01-15 | 东莞康特尔电子有限公司 | Vehicle-mounted alarm system employing GPS satellite navigation and positioning |
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Application publication date: 20200901 |
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