CN110809041B - Data synchronization method and device, electronic equipment and storage medium - Google Patents
Data synchronization method and device, electronic equipment and storage medium Download PDFInfo
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- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
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- H04L67/1095—Replication or mirroring of data, e.g. scheduling or transport for data synchronisation between network nodes
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- H04L67/60—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources
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Abstract
The application discloses a data synchronization method, a data synchronization device, electronic equipment and a storage medium, and relates to the field of data transmission. The specific implementation scheme is as follows: each sensing device periodically transmits a time service request to the synchronous server; wherein, the time service request carries the identification of each sensing device; each sensing device receives a time service response returned by the synchronous server; the time service response carries a predetermined starting time stamp and a corresponding first frame recording time of each sensing device; and each sensing device sets own system time according to the starting time, and transmits recording data according to the system time, the corresponding first frame recording time of each sensing device and a predetermined time interval. The embodiment of the application can effectively synchronize the recorded data sent by each sensing device, and ensure that the data time error is within a proper range.
Description
Technical Field
The present application relates to the field of data processing technologies, and in particular, to a data synchronization method, a data synchronization device, an electronic device, and a storage medium.
Background
Human body tracking in an unmanned retail setting requires that the data of multiple sensing devices be synchronized, requiring that the data time error between multiple sensors be sufficiently small. In the prior art, different sensing devices are mutually independent, different sensing devices are started in sequence, and each sensing device transmits data in a fixed frame mode, so that only one sensing device has data at a certain moment, and other sensing devices have data at other moments. For example, after the sensor device 1 and the sensor device 2 are started, the first frame data is recorded, and then one frame data is recorded every 125ms, which is caused by the start time of the sensor device 1 and the start time of the sensor device 2, so that each frame data is not synchronous.
Disclosure of Invention
In view of this, the embodiments of the present application provide a data synchronization method, apparatus, electronic device, and storage medium, which can effectively synchronize recording data sent by each sensing device, and ensure that a data time error is within a proper range.
In a first aspect, an embodiment of the present application provides a data synchronization method, applied to a sensing device, where the method includes:
Periodically sending a time service request to a synchronous server; wherein, the time service request carries the identification of each sensing device;
receiving a time service response returned by the synchronous server; the time service response carries a predetermined starting time stamp and a corresponding first frame recording time of each sensing device;
and setting the system time of the system according to the starting time, and sending recording data according to the system time, the recording time of the first frame corresponding to each sensing device and a predetermined time interval.
The above embodiment has the following advantages or beneficial effects: according to the method and the device, the time service request is sent to the synchronous server, the time service response returned by the synchronous server is received, and each sensing device can acquire a preset starting time stamp and the corresponding first frame recording time of each sensing device; and then each sensing device can set the system time of the starting time per se, and transmit recording data according to the system time, the corresponding first frame recording time of each sensing device and a predetermined time interval, so that the recording data transmitted by each sensing device can be effectively synchronized, and the data time error is ensured to be within a proper range.
In the foregoing embodiment, the sending recording data according to the system time, the first frame recording time corresponding to each sensing device, and a predetermined time interval includes:
and taking the system time as the starting time of each sensing device, and transmitting the recording data according to the predetermined time interval when the current time of each sensing device reaches the recording time of the first frame corresponding to each sensing device.
The above embodiment has the following advantages or beneficial effects: each sensing device takes the acquired starting time as a reference, the first frame recording time corresponding to each sensing device is calculated by the synchronous server, and when the current time of each sensing device reaches the first frame recording time corresponding to each sensing device, each sensing device can send recording data according to a predetermined time interval, so that the recording data sent by each sensing device can be effectively synchronized, and the data time error is ensured to be within a proper range.
In a second aspect, an embodiment of the present application further provides a data synchronization method, applied to a synchronization server, where the method includes:
periodically receiving a time service request sent by each sensing device; wherein, the time service request carries the identification of each sensing device;
According to the time of receiving the time service request sent by each sensing device, calculating the corresponding first frame recording time of each sensing device;
returning a time service response to each sensing device; the time service response carries a predetermined starting time stamp and a first frame recording time corresponding to each sensing device, so that each sensing device sets own system time according to the starting time, and transmits recording data according to the system time, the first frame recording time corresponding to each sensing device and a predetermined time interval.
The above embodiment has the following advantages or beneficial effects: the method comprises the steps that a unified starting time stamp is determined through a synchronous server, and initial frame recording time is calculated for each sensing device through the synchronous server, wherein each sensing device can acquire a preset starting time stamp and initial frame recording time corresponding to each sensing device; and then each sensing device can set the system time of the starting time per se, and transmit recording data according to the system time, the corresponding first frame recording time of each sensing device and a predetermined time interval, so that the recording data transmitted by each sensing device can be effectively synchronized, and the data time error is ensured to be within a proper range.
In the foregoing embodiment, the calculating, according to the time when the time service request sent by each sensing device is received, the first frame recording time corresponding to each sensing device includes:
when the synchronization server receives a time service request sent by a first sensing device, adding a first preset duration to the time for receiving the time service request sent by the first sensing device as a first frame recording time corresponding to the first sensing device;
when a synchronous server receives a time service request sent by an Nth sensing device, if the time for receiving the time service request sent by the Nth sensing device is smaller than the first frame recording time corresponding to the N-1 th sensing device minus a second preset duration, taking the first frame recording time corresponding to the N-1 th sensing device as the first frame recording time corresponding to the N-th sensing device; if the time of receiving the time service request sent by the N-1 th sensing device is greater than or equal to the first frame recording time corresponding to the N-1 th sensing device minus a second preset duration, adding the first frame recording time of the N-1 th sensing device to the first preset duration to be used as the first frame recording time corresponding to the N-1 th sensing device; wherein N is a natural number greater than or equal to 2.
The above embodiment has the following advantages or beneficial effects: when receiving a time service request sent by a second sensing device and a subsequent sensing device, the synchronous server can determine whether the time service request is closer to the first frame recording time corresponding to the last sensing device or the time service request is closer to the first frame recording time corresponding to the next sensing device; if the time service request is closer to the first frame recording time corresponding to the last sensing device, the first frame recording time corresponding to the last sensing device is set as the first frame recording time corresponding to the sensing device; and if the time service request is closer to the first frame recording time corresponding to the next sensing device, the first frame recording time corresponding to the next sensing device is set as the first frame recording time corresponding to the sensing device.
In a third aspect, the present application further provides a data synchronization apparatus, the apparatus including: the device comprises a first sending module, a first receiving module and a synchronizing module; wherein, the liquid crystal display device comprises a liquid crystal display device,
the first sending module is used for periodically sending a time service request to the synchronous server; wherein, the time service request carries the identification of each sensing device;
The first receiving module is used for receiving a time service response returned by the synchronous server; the time service response carries a predetermined starting time stamp and a corresponding first frame recording time of each sensing device;
the synchronization module is used for setting the system time of the synchronous module according to the starting time, and sending recording data according to the system time, the first frame recording time corresponding to each sensing device and a preset time interval.
In the foregoing embodiment, the synchronization module is specifically configured to take the system time as a start time of each sensing device, and send the recording data according to the predetermined time interval when a current time of each sensing device reaches a first frame recording time corresponding to each sensing device.
In a fourth aspect, the present application further provides a data synchronization device, including: the device comprises a second receiving module, a calculating module and a second sending module; wherein, the liquid crystal display device comprises a liquid crystal display device,
the second receiving module is used for periodically receiving time service requests sent by the sensing devices; wherein, the time service request carries the identification of each sensing device;
the calculating module is used for calculating the first frame recording time corresponding to each sensing device according to the time of receiving the time service request sent by each sensing device;
The second sending module is used for returning time service responses to the sensing devices; the time service response carries a predetermined starting time stamp and a first frame recording time corresponding to each sensing device, so that each sensing device sets own system time according to the starting time, and transmits recording data according to the system time, the first frame recording time corresponding to each sensing device and a predetermined time interval.
In the foregoing embodiment, the calculating module is specifically configured to, when the synchronization server receives a time service request sent by a first sensing device, add a first preset duration to a time of receiving the time service request sent by the first sensing device as a first frame recording time corresponding to the first sensing device; when a synchronous server receives a time service request sent by an Nth sensing device, if the time for receiving the time service request sent by the Nth sensing device is smaller than the first frame recording time corresponding to the N-1 th sensing device minus a second preset duration, taking the first frame recording time corresponding to the N-1 th sensing device as the first frame recording time corresponding to the N-th sensing device; if the time of receiving the time service request sent by the N-1 th sensing device is greater than or equal to the first frame recording time corresponding to the N-1 th sensing device minus a second preset duration, adding the first frame recording time of the N-1 th sensing device to the first preset duration to be used as the first frame recording time corresponding to the N-1 th sensing device; wherein N is a natural number greater than or equal to 2.
In a fifth aspect, embodiments of the present application provide an electronic device, including:
one or more processors;
a memory for storing one or more programs,
the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the data synchronization method described in any of the embodiments of the present application.
In a sixth aspect, embodiments of the present application provide a storage medium having stored thereon a computer program which, when executed by a processor, implements the data synchronization method described in any of the embodiments of the present application.
One embodiment of the above application has the following advantages or benefits: according to the data synchronization method, the data synchronization device, the electronic equipment and the storage medium, each sensing equipment periodically sends a time service request to the synchronization server; wherein, the time service request carries the identification of each sensing device; the synchronization server calculates the first frame recording time corresponding to each sensing device according to the time of receiving the time service request sent by each sensing device; the synchronization server returns a time service response to each sensing device; the time service response carries a predetermined starting time stamp and a corresponding first frame recording time of each sensing device; each sensing device sets own system time according to the starting time, and transmits recording data according to the system time, the corresponding first frame recording time of each sensing device and a predetermined time interval. That is, each sensing device in the application may set its own system time through the synchronization server, and send recording data synchronously according to the system time and the first frame recording time calculated by the synchronization server and corresponding to each sensing device. Because the system time of each sensing device is determined through the synchronous server and the first frame recording time of each sensing device is calculated through the synchronous server, the problem that the recording data sent by each sensing device is not synchronous is solved. By adopting the technical scheme provided by the application, the recording data sent by each sensing device can be effectively synchronized, and the data time error is ensured to be within a proper range; in addition, the technical scheme of the embodiment of the application is simple and convenient to realize, convenient to popularize and wider in application range.
Other effects of the above alternative will be described below in connection with specific embodiments.
Drawings
The drawings are for better understanding of the present solution and do not constitute a limitation of the present application. Wherein:
fig. 1 is a flow chart of a data synchronization method according to an embodiment of the present application;
fig. 2 is a flow chart of a data synchronization method according to a second embodiment of the present application;
fig. 3 is a flow chart of a data synchronization method according to a third embodiment of the present application;
fig. 4 is a flow chart of a data synchronization method according to a fourth embodiment of the present application;
fig. 5 is a schematic structural diagram of a data synchronization device provided in a fifth embodiment of the present application;
fig. 6 is a schematic structural diagram of a data synchronization device according to a sixth embodiment of the present application;
fig. 7 is a block diagram of an electronic device for implementing a data synchronization method of an embodiment of the present application.
Detailed Description
Exemplary embodiments of the present application are described below in conjunction with the accompanying drawings, which include various details of the embodiments of the present application to facilitate understanding, and should be considered as merely exemplary. Accordingly, one of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the present application. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.
Example 1
Fig. 1 is a schematic flow chart of a data synchronization method provided in an embodiment of the present application, where the method may be performed by a data synchronization apparatus or each sensing device, where the apparatus or each sensing device may be implemented by software and/or hardware, and where the apparatus or each sensing device may be integrated into any intelligent device having a network communication function. As shown in fig. 1, the data synchronization method may include the steps of:
s101, periodically sending a time service request to a synchronous server; wherein the time service request carries the identity of each sensing device.
In a specific embodiment of the present application, each sensing device may periodically send a time service request to the synchronization server; wherein the time service request carries the identity of each sensing device. For example, the camera 1 may periodically send a time service request 1 to the synchronization server; the time service request 1 carries an identifier of the camera 1; the camera 2 can periodically send a time service request 2 to the synchronous server; wherein, the time service request 2 carries the identification of the camera 2; and so on.
S102, receiving a time service response returned by the synchronous server; the time service response carries a predetermined starting time stamp and a corresponding first frame recording time of each sensing device.
In a specific embodiment of the present application, each sensing device may receive a time service response returned by the synchronization server; the time service response carries a predetermined starting time stamp and a corresponding first frame recording time of each sensing device. For example, the camera 1 receives a time service response 1 returned by the synchronization server; the time service response 1 carries a predetermined starting time stamp and a corresponding first frame recording time of the camera 1; the camera 2 receives a time service response 2 returned by the synchronous server; the time service response 2 carries a predetermined start time stamp and a corresponding first frame recording time of the camera 2. The predetermined start-up time stamp here may be a time predetermined by the synchronization server, for example: 2019, 1 month, 1 day 00:00:00; the first frame recording time corresponding to each camera is calculated by the synchronous server according to the received time service request sent by each camera, and different first frame recording times can be calculated for different cameras.
S103, setting own system time according to the starting time, and sending recording data according to the system time, the corresponding first frame recording time of each sensing device and a predetermined time interval.
In a specific embodiment of the present application, each sensing device may set its own system time according to the start time, and send recording data according to the system time, the corresponding first frame recording time of each sensing device, and a predetermined time interval. Specifically, each sensing device may use the system time as the start time of each sensing device, and when the current time of each sensing device reaches the recording time of the first frame corresponding to each sensing device, each sensing device may send the recording data at a predetermined time interval. For example, assume that the predetermined start time stamp carried in the time service response returned by the synchronization server received by the camera 1 is 2019, 1 month, 1 day 00:00:00, the camera 1 can set the own system time to 2019, 1 month, 1 day and 00:00:00. assuming that the recording time of the first frame corresponding to the camera 1 carried in the time service response returned by the synchronization server is 2019, 1 month and 1 day 00:00:00:40, when the current time of the camera 1 reaches the recording time of the first frame corresponding to the camera 1, the camera 1 may send the recording data according to a predetermined time interval. And so on.
According to the data synchronization method provided by the embodiment of the application, each sensing device periodically sends a time service request to a synchronization server; wherein, the time service request carries the identification of each sensing device; the synchronization server calculates the first frame recording time corresponding to each sensing device according to the time of receiving the time service request sent by each sensing device; the synchronization server returns a time service response to each sensing device; the time service response carries a predetermined starting time stamp and a corresponding first frame recording time of each sensing device; each sensing device sets own system time according to the starting time, and transmits recording data according to the system time, the corresponding first frame recording time of each sensing device and a predetermined time interval. That is, each sensing device in the application may set its own system time through the synchronization server, and send recording data synchronously according to the system time and the first frame recording time calculated by the synchronization server and corresponding to each sensing device. Because the system time of each sensing device is determined through the synchronous server and the first frame recording time of each sensing device is calculated through the synchronous server, the problem that the recording data sent by each sensing device is not synchronous is solved. By adopting the technical scheme provided by the application, the recording data sent by each sensing device can be effectively synchronized, and the data time error is ensured to be within a proper range; in addition, the technical scheme of the embodiment of the application is simple and convenient to realize, convenient to popularize and wider in application range.
Example two
Fig. 2 is a flow chart of a data synchronization method according to a second embodiment of the present application. As shown in fig. 2, the data synchronization method may include the steps of:
s201, periodically sending a time service request to a synchronous server; wherein the time service request carries the identity of each sensing device.
In a specific embodiment of the present application, each sensing device may periodically send a time service request to the synchronization server; wherein the time service request carries the identity of each sensing device. For example, the camera 1 may periodically send a time service request 1 to the synchronization server; the time service request 1 carries an identifier of the camera 1; the camera 2 can periodically send a time service request 2 to the synchronous server; wherein, the time service request 2 carries the identification of the camera 2; and so on.
S202, receiving a time service response returned by the synchronous server; the time service response carries a predetermined starting time stamp and a corresponding first frame recording time of each sensing device.
In a specific embodiment of the present application, each sensing device may receive a time service response returned by the synchronization server; the time service response carries a predetermined starting time stamp and a corresponding first frame recording time of each sensing device. For example, the camera 1 receives a time service response 1 returned by the synchronization server; the time service response 1 carries a predetermined starting time stamp and a corresponding first frame recording time of the camera 1; the camera 2 receives a time service response 2 returned by the synchronous server; the time service response 2 carries a predetermined start time stamp and a corresponding first frame recording time of the camera 2.
S203, taking the system time as the starting time of each sensing device, and sending recording data according to a predetermined time interval when the current time of each sensing device reaches the recording time of the first frame corresponding to each sensing device.
In a specific embodiment of the present application, each sensing device may use the system time as a start time of each sensing device, and when a current time of each sensing device reaches a first frame recording time corresponding to each sensing device, record data is sent according to a predetermined time interval. For example, assume that the predetermined start time stamp carried in the time service response returned by the synchronization server received by the camera 1 is 2019, 1 month, 1 day 00:00:00, the camera 1 can set the own system time to 2019, 1 month, 1 day and 00:00:00. assuming that the recording time of the first frame corresponding to the camera 1 carried in the time service response returned by the synchronization server is 2019, 1 month and 1 day 00:00:00:40, when the current time of the camera 1 reaches the recording time of the first frame corresponding to the camera 1, the camera 1 may send the recording data according to a predetermined time interval. And so on.
According to the data synchronization method provided by the embodiment of the application, each sensing device periodically sends a time service request to a synchronization server; wherein, the time service request carries the identification of each sensing device; the synchronization server calculates the first frame recording time corresponding to each sensing device according to the time of receiving the time service request sent by each sensing device; the synchronization server returns a time service response to each sensing device; the time service response carries a predetermined starting time stamp and a corresponding first frame recording time of each sensing device; each sensing device sets own system time according to the starting time, and transmits recording data according to the system time, the corresponding first frame recording time of each sensing device and a predetermined time interval. That is, each sensing device in the application may set its own system time through the synchronization server, and send recording data synchronously according to the system time and the first frame recording time calculated by the synchronization server and corresponding to each sensing device. Because the system time of each sensing device is determined through the synchronous server and the first frame recording time of each sensing device is calculated through the synchronous server, the problem that the recording data sent by each sensing device is not synchronous is solved. By adopting the technical scheme provided by the application, the recording data sent by each sensing device can be effectively synchronized, and the data time error is ensured to be within a proper range; in addition, the technical scheme of the embodiment of the application is simple and convenient to realize, convenient to popularize and wider in application range.
Example III
Fig. 3 is a schematic flow chart of a data synchronization method provided in the third embodiment of the present application, where the method may be performed by a data synchronization device or a synchronization server, where the device or the synchronization server may be implemented by software and/or hardware, and the device or the synchronization server may be integrated into any intelligent device having a network communication function. As shown in fig. 3, the data synchronization method may include the steps of:
s301, periodically receiving time service requests sent by all sensing devices; wherein the time service request carries the identity of each sensing device.
In a specific embodiment of the present application, the synchronization server may periodically receive a time service request sent by each sensing device; wherein the time service request carries the identity of each sensing device. For example, the synchronization server may periodically receive the time service request 1 sent by the camera 1; the time service request 1 carries an identifier of the camera 1; the synchronization server can also periodically receive a time service request 2 sent by the camera 2; wherein, the time service request 2 carries the identification of the camera 2; and so on.
S302, calculating the recording time of the first frame corresponding to each sensing device according to the time of receiving the time service request sent by each sensing device.
In a specific embodiment of the present application, the synchronization server may calculate, according to a time of receiving a time service request sent by each sensing device, a first frame recording time corresponding to each sensing device. Specifically, when the synchronization server receives a time service request sent by the first sensing device, the synchronization server may add a first preset duration to a time of receiving the time service request sent by the first sensing device as a first frame recording time corresponding to the first sensing device; when the synchronization server receives the time service request sent by the nth sensing device, if the time for receiving the time service request sent by the nth sensing device is smaller than the first frame recording time corresponding to the (N-1) th sensing device minus the second preset duration, the synchronization server can take the first frame recording time corresponding to the (N-1) th sensing device as the first frame recording time corresponding to the (N) th sensing device; if the time of receiving the time service request sent by the nth sensing device is greater than or equal to the first frame recording time corresponding to the (N-1) th sensing device minus the second preset duration, the synchronization server can add the first frame recording time corresponding to the (N-1) th sensing device to the first preset duration as the first frame recording time corresponding to the (N) th sensing device; wherein N is a natural number greater than or equal to 2. For example, when the synchronization server receives the time service request 1 sent by the camera 1, the synchronization server may add a first preset duration (the first preset duration may be 40 ms) to the time of receiving the time service request 1 sent by the camera 1 as a first frame recording time corresponding to the camera 1; when the synchronization server receives the time service request 2 sent by the camera 2, if the time for receiving the time service request 2 sent by the camera 2 is less than the first frame recording time corresponding to the camera 1 minus a second preset duration (the second preset duration may be 15 ms), the synchronization server may use the first frame recording time corresponding to the camera 1 as the first frame recording time corresponding to the camera 2; if the time of receiving the time service request 2 sent by the camera 2 is greater than or equal to the first frame recording time corresponding to the camera 1 minus the second preset duration, the synchronization server can add the first frame recording time corresponding to the camera 1 plus the first preset duration as the first frame recording time corresponding to the camera 2; and so on.
S303, returning time service responses to the sensing devices; the time service response carries a predetermined starting time stamp and a first frame recording time corresponding to each sensing device, so that each sensing device sets own system time according to the starting time, and transmits recording data according to the system time, the first frame recording time corresponding to each sensing device and a predetermined time interval.
In particular embodiments of the present application, the synchronization server may return a time service response to each sensing device; the time service response carries a predetermined starting time stamp and a first frame recording time corresponding to each sensing device, so that each sensing device sets own system time according to the starting time, and transmits recording data according to the system time, the first frame recording time corresponding to each sensing device and a predetermined time interval. Specifically, each sensing device may use the system time as the start time of each sensing device, and when the current time of each sensing device reaches the recording time of the first frame corresponding to each sensing device, each sensing device may send the recording data at a predetermined time interval.
According to the data synchronization method provided by the embodiment of the application, each sensing device periodically sends a time service request to a synchronization server; wherein, the time service request carries the identification of each sensing device; the synchronization server calculates the first frame recording time corresponding to each sensing device according to the time of receiving the time service request sent by each sensing device; the synchronization server returns a time service response to each sensing device; the time service response carries a predetermined starting time stamp and a corresponding first frame recording time of each sensing device; each sensing device sets own system time according to the starting time, and transmits recording data according to the system time, the corresponding first frame recording time of each sensing device and a predetermined time interval. That is, each sensing device in the application may set its own system time through the synchronization server, and send recording data synchronously according to the system time and the first frame recording time calculated by the synchronization server and corresponding to each sensing device. Because the system time of each sensing device is determined through the synchronous server and the first frame recording time of each sensing device is calculated through the synchronous server, the problem that the recording data sent by each sensing device is not synchronous is solved. By adopting the technical scheme provided by the application, the recording data sent by each sensing device can be effectively synchronized, and the data time error is ensured to be within a proper range; in addition, the technical scheme of the embodiment of the application is simple and convenient to realize, convenient to popularize and wider in application range.
Example IV
Fig. 4 is a flow chart of a data synchronization method according to a fourth embodiment of the present application. As shown in fig. 4, the data synchronization method may include the steps of:
s401, periodically receiving time service requests sent by each sensing device; wherein the time service request carries the identity of each sensing device.
In a specific embodiment of the present application, the synchronization server may periodically receive a time service request sent by each sensing device; wherein the time service request carries the identity of each sensing device. For example, the synchronization server may periodically receive the time service request 1 sent by the camera 1; the time service request 1 carries an identifier of the camera 1; the synchronization server can also periodically receive a time service request 2 sent by the camera 2; wherein, the time service request 2 carries the identification of the camera 2; and so on.
S402, when the synchronization server receives a time service request sent by a first sensing device, adding a first preset duration to the time of receiving the time service request sent by the first sensing device as a first frame recording time corresponding to the first sensing device.
In a specific embodiment of the present application, when the synchronization server receives the time service request sent by the first sensing device, the synchronization server may add the time of receiving the time service request sent by the first sensing device to the first preset duration as the first frame recording time corresponding to the first sensing device. For example, when the synchronization server receives the time service request 1 sent by the camera 1, the synchronization server may add a first preset duration (the first preset duration may be 40 ms) to the time of receiving the time service request 1 sent by the camera 1 as the corresponding first frame recording time of the camera 1.
S403, when the synchronous server receives a time service request sent by the Nth sensing device, if the time for receiving the time service request sent by the Nth sensing device is smaller than the first frame recording time corresponding to the N-1 th sensing device minus a second preset duration, taking the first frame recording time corresponding to the N-1 th sensing device as the first frame recording time corresponding to the N-th sensing device; if the time of receiving the time service request sent by the Nth sensing device is greater than or equal to the first frame recording time corresponding to the N-1 th sensing device minus the second preset duration, adding the first frame recording time corresponding to the N-1 th sensing device plus the first preset duration as the first frame recording time corresponding to the N-1 th sensing device; wherein N is a natural number greater than or equal to 2.
In a specific embodiment of the present application, when the synchronization server receives the time service request sent by the nth sensing device, if the time for receiving the time service request sent by the nth sensing device is less than the first frame recording time corresponding to the N-1 th sensing device minus the second preset duration, the synchronization server may use the first frame recording time corresponding to the N-1 th sensing device as the first frame recording time corresponding to the nth sensing device; if the time of receiving the time service request sent by the nth sensing device is greater than or equal to the first frame recording time corresponding to the (N-1) th sensing device minus the second preset duration, the synchronization server can add the first frame recording time corresponding to the (N-1) th sensing device to the first preset duration as the first frame recording time corresponding to the (N) th sensing device; wherein N is a natural number greater than or equal to 2. For example, when the synchronization server receives the time service request 2 sent by the camera 2, if the time for receiving the time service request 2 sent by the camera 2 is less than the first frame recording time corresponding to the camera 1 minus a second preset duration (the second preset duration may be 15 ms), the synchronization server may use the first frame recording time corresponding to the camera 1 as the first frame recording time corresponding to the camera 2; if the time of receiving the time service request 2 sent by the camera 2 is greater than or equal to the first frame recording time corresponding to the camera 1 minus the second preset duration, the synchronization server can add the first frame recording time corresponding to the camera 1 plus the first preset duration as the first frame recording time corresponding to the camera 2; and so on.
S404, returning a time service response to each sensing device; the time service response carries a predetermined starting time stamp and a first frame recording time corresponding to each sensing device, so that each sensing device sets own system time according to the starting time, and transmits recording data according to the system time, the first frame recording time corresponding to each sensing device and a predetermined time interval.
In particular embodiments of the present application, the synchronization server may return a time service response to each sensing device; the time service response carries a predetermined starting time stamp and a first frame recording time corresponding to each sensing device, so that each sensing device sets own system time according to the starting time, and transmits recording data according to the system time, the first frame recording time corresponding to each sensing device and a predetermined time interval. Specifically, each sensing device may use the system time as the start time of each sensing device, and when the current time of each sensing device reaches the recording time of the first frame corresponding to each sensing device, each sensing device may send the recording data at a predetermined time interval. For example, assume that the predetermined start time stamp carried in the time service response returned by the synchronization server received by the camera 1 is 2019, 1 month, 1 day 00:00:00, the camera 1 can set the own system time to 2019, 1 month, 1 day and 00:00:00. assuming that the recording time of the first frame corresponding to the camera 1 carried in the time service response returned by the synchronization server is 2019, 1 month and 1 day 00:00:00:40, when the current time of the camera 1 reaches the recording time of the first frame corresponding to the camera 1, the camera 1 may send the recording data according to a predetermined time interval. And so on.
According to the data synchronization method provided by the embodiment of the application, each sensing device periodically sends a time service request to a synchronization server; wherein, the time service request carries the identification of each sensing device; the synchronization server calculates the first frame recording time corresponding to each sensing device according to the time of receiving the time service request sent by each sensing device; the synchronization server returns a time service response to each sensing device; the time service response carries a predetermined starting time stamp and a corresponding first frame recording time of each sensing device; each sensing device sets own system time according to the starting time, and transmits recording data according to the system time, the corresponding first frame recording time of each sensing device and a predetermined time interval. That is, each sensing device in the application may set its own system time through the synchronization server, and send recording data synchronously according to the system time and the first frame recording time calculated by the synchronization server and corresponding to each sensing device. Because the system time of each sensing device is determined through the synchronous server and the first frame recording time of each sensing device is calculated through the synchronous server, the problem that the recording data sent by each sensing device is not synchronous is solved. By adopting the technical scheme provided by the application, the recording data sent by each sensing device can be effectively synchronized, and the data time error is ensured to be within a proper range; in addition, the technical scheme of the embodiment of the application is simple and convenient to realize, convenient to popularize and wider in application range.
Example five
Fig. 5 is a schematic structural diagram of a data synchronization device according to a fifth embodiment of the present application. As shown in fig. 5, the apparatus 500 includes: a first transmitting module 501, a first receiving module 502 and a synchronizing module 503; wherein, the liquid crystal display device comprises a liquid crystal display device,
the first sending module 501 is configured to send a time service request to a synchronization server periodically; wherein, the time service request carries the identification of each sensing device;
the first receiving module 502 is configured to receive a time service response returned by the synchronization server; the time service response carries a predetermined starting time stamp and a corresponding first frame recording time of each sensing device;
the synchronization module 503 is configured to set a system time according to the start time, and send recording data according to the system time, a first frame recording time corresponding to each sensing device, and a predetermined time interval.
Further, the synchronization module 503 is specifically configured to take the system time as a start time of each sensing device, and send the recording data according to the predetermined time interval when a current time of each sensing device reaches a first frame recording time corresponding to each sensing device.
The data synchronization device can execute the methods provided in the first and second embodiments of the present application, and has the corresponding functional modules and beneficial effects of executing the methods. Technical details not described in detail in this embodiment can be seen in the data synchronization methods provided in the first and second embodiments of the present application.
Example six
Fig. 6 is a schematic structural diagram of a data synchronization device according to a sixth embodiment of the present application. As shown in fig. 6, the apparatus 600 includes: a second receiving module 601, a calculating module 602, and a second transmitting module 603; wherein, the liquid crystal display device comprises a liquid crystal display device,
the second receiving module 601 is configured to periodically receive a time service request sent by each sensing device; wherein, the time service request carries the identification of each sensing device;
the calculating module 602 is configured to calculate a first frame recording time corresponding to each sensing device according to a time when the time service request sent by each sensing device is received;
the second sending module 603 is configured to return a time service response to each sensing device; the time service response carries a predetermined starting time stamp and a first frame recording time corresponding to each sensing device, so that each sensing device sets own system time according to the starting time, and transmits recording data according to the system time, the first frame recording time corresponding to each sensing device and a predetermined time interval.
Further, the calculating module 602 is specifically configured to, when the synchronization server receives a time service request sent by a first sensing device, add a first preset duration to a time of receiving the time service request sent by the first sensing device as a first frame recording time corresponding to the first sensing device; when a synchronous server receives a time service request sent by an Nth sensing device, if the time for receiving the time service request sent by the Nth sensing device is smaller than the first frame recording time corresponding to the N-1 th sensing device minus a second preset duration, taking the first frame recording time corresponding to the N-1 th sensing device as the first frame recording time corresponding to the N-th sensing device; if the time of receiving the time service request sent by the N-1 th sensing device is greater than or equal to the first frame recording time corresponding to the N-1 th sensing device minus a second preset duration, adding the first frame recording time of the N-1 th sensing device to the first preset duration to be used as the first frame recording time corresponding to the N-1 th sensing device; wherein N is a natural number greater than or equal to 2.
The data synchronization device can execute the methods provided in embodiments 3 and 4 of the present application, and has the corresponding functional modules and beneficial effects of executing the methods. Technical details not described in detail in this embodiment can be seen in the data synchronization methods provided in any of the third and fourth embodiments of the present application.
Example seven
According to embodiments of the present application, an electronic device and a readable storage medium are also provided.
As shown in fig. 7, a block diagram of an electronic device according to a data synchronization method according to an embodiment of the present application is shown. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The electronic device may also represent various forms of mobile devices, such as personal digital processing, cellular telephones, smartphones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the application described and/or claimed herein.
As shown in fig. 7, the electronic device includes: one or more processors 701, memory 702, and interfaces for connecting the various components, including high-speed interfaces and low-speed interfaces. The various components are interconnected using different buses and may be mounted on a common motherboard or in other manners as desired. The processor may process instructions executing within the electronic device, including instructions stored in or on memory to display graphical information of the GUI on an external input/output device, such as a display device coupled to the interface. In other embodiments, multiple processors and/or multiple buses may be used, if desired, along with multiple memories and multiple memories. Also, multiple electronic devices may be connected, each providing a portion of the necessary operations (e.g., as a server array, a set of blade servers, or a multiprocessor system). One processor 701 is illustrated in fig. 7.
The memory 702 is used as a non-transitory computer readable storage medium for storing non-transitory software programs, non-transitory computer executable programs, and modules, such as program instructions/modules (e.g., the first transmitting module 501, the first receiving module 502, and the synchronizing module 503 shown in fig. 5) corresponding to the data synchronization method in the embodiments of the present application. The processor 701 executes various functional applications of the server and data processing, i.e., implements the data synchronization method in the above-described method embodiments, by running non-transitory software programs, instructions, and modules stored in the memory 702.
The electronic device of the data synchronization method may further include: an input device 703 and an output device 704. The processor 701, the memory 702, the input device 703 and the output device 704 may be connected by a bus or otherwise, in fig. 7 by way of example.
The input device 703 may receive input numeric or character information and generate key signal inputs related to user settings and function control of the electronic device of the data synchronization method, such as a touch screen, a keypad, a mouse, a track pad, a touch pad, a pointer stick, one or more mouse buttons, a track ball, a joystick, and the like. The output device 704 may include a display apparatus, auxiliary lighting devices (e.g., LEDs), and haptic feedback devices (e.g., vibration motors), among others. The display device may include, but is not limited to, a Liquid Crystal Display (LCD), a Light Emitting Diode (LED) display, and a plasma display. In some implementations, the display device may be a touch screen.
Various implementations of the systems and techniques described here can be realized in digital electronic circuitry, integrated circuitry, application specific ASIC (application specific integrated circuit), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs, the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general-purpose programmable processor, that may receive data and instructions from, and transmit data and instructions to, a storage system, at least one input device, and at least one output device.
These computing programs (also referred to as programs, software applications, or code) include machine instructions for a programmable processor, and may be implemented in a high-level procedural and/or object-oriented programming language, and/or in assembly/machine language. As used herein, the terms "machine-readable medium" and "computer-readable medium" refer to any computer program product, apparatus, and/or device (e.g., magnetic discs, optical disks, memory, programmable Logic Devices (PLDs)) used to provide machine instructions and/or data to a programmable processor, including a machine-readable medium that receives machine instructions as a machine-readable signal. The term "machine-readable signal" refers to any signal used to provide machine instructions and/or data to a programmable processor.
To provide for interaction with a user, the systems and techniques described here can be implemented on a computer having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and pointing device (e.g., a mouse or trackball) by which a user can provide input to the computer. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic input, speech input, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a background component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such background, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), and the internet.
The computer system may include a client and a server. The client and server are typically remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other.
According to the technical scheme of the embodiment of the application, each sensing device periodically sends a time service request to the synchronous server; wherein, the time service request carries the identification of each sensing device; the synchronization server calculates the first frame recording time corresponding to each sensing device according to the time of receiving the time service request sent by each sensing device; the synchronization server returns a time service response to each sensing device; the time service response carries a predetermined starting time stamp and a corresponding first frame recording time of each sensing device; each sensing device sets own system time according to the starting time, and transmits recording data according to the system time, the corresponding first frame recording time of each sensing device and a predetermined time interval. That is, each sensing device in the application may set its own system time through the synchronization server, and send recording data synchronously according to the system time and the first frame recording time calculated by the synchronization server and corresponding to each sensing device. Because the system time of each sensing device is determined through the synchronous server and the first frame recording time of each sensing device is calculated through the synchronous server, the problem that the recording data sent by each sensing device is not synchronous is solved. By adopting the technical scheme provided by the application, the recording data sent by each sensing device can be effectively synchronized, and the data time error is ensured to be within a proper range; in addition, the technical scheme of the embodiment of the application is simple and convenient to realize, convenient to popularize and wider in application range.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present application may be performed in parallel, sequentially, or in a different order, provided that the desired results of the technical solutions disclosed in the present application can be achieved, and are not limited herein.
The above embodiments do not limit the scope of the application. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application are intended to be included within the scope of the present application.
Claims (8)
1. A method of data synchronization, for use with a sensing device, the method comprising:
periodically sending a time service request to a synchronous server; wherein, the time service request carries the identification of each sensing device;
receiving a time service response returned by the synchronous server; the time service response carries a predetermined starting time stamp and a corresponding first frame recording time of each sensing device;
Setting own system time according to the starting time, and sending recording data according to the system time, the corresponding first frame recording time of each sensing device and a preset time interval;
the first frame recording time is determined according to the following mode:
when the synchronization server receives a time service request sent by a first sensing device, adding a first preset duration to the time for receiving the time service request sent by the first sensing device as a first frame recording time corresponding to the first sensing device;
when a synchronous server receives a time service request sent by an Nth sensing device, if the time for receiving the time service request sent by the Nth sensing device is smaller than the first frame recording time corresponding to the N-1 th sensing device minus a second preset duration, taking the first frame recording time corresponding to the N-1 th sensing device as the first frame recording time corresponding to the N-th sensing device; if the time of receiving the time service request sent by the N-1 th sensing device is greater than or equal to the first frame recording time corresponding to the N-1 th sensing device minus a second preset duration, adding the first frame recording time of the N-1 th sensing device to the first preset duration to be used as the first frame recording time corresponding to the N-1 th sensing device; wherein N is a natural number greater than or equal to 2.
2. The method of claim 1, wherein the transmitting the recording data according to the system time and the corresponding first frame recording time of each sensing device and the predetermined time interval comprises:
and taking the system time as the starting time of each sensing device, and transmitting the recording data according to the predetermined time interval when the current time of each sensing device reaches the recording time of the first frame corresponding to each sensing device.
3. A data synchronization method, applied to a synchronization server, comprising:
periodically receiving a time service request sent by each sensing device; wherein, the time service request carries the identification of each sensing device;
according to the time of receiving the time service request sent by each sensing device, calculating the corresponding first frame recording time of each sensing device;
returning a time service response to each sensing device; the time service response carries a predetermined starting time stamp and a first frame recording time corresponding to each sensing device, so that each sensing device sets own system time according to the starting time, and transmits recording data according to the system time, the first frame recording time corresponding to each sensing device and a predetermined time interval;
The calculating the first frame recording time corresponding to each sensing device according to the time of receiving the time service request sent by each sensing device comprises the following steps:
when the synchronization server receives a time service request sent by a first sensing device, adding a first preset duration to the time for receiving the time service request sent by the first sensing device as a first frame recording time corresponding to the first sensing device;
when a synchronous server receives a time service request sent by an Nth sensing device, if the time for receiving the time service request sent by the Nth sensing device is smaller than the first frame recording time corresponding to the N-1 th sensing device minus a second preset duration, taking the first frame recording time corresponding to the N-1 th sensing device as the first frame recording time corresponding to the N-th sensing device; if the time of receiving the time service request sent by the N-1 th sensing device is greater than or equal to the first frame recording time corresponding to the N-1 th sensing device minus a second preset duration, adding the first frame recording time of the N-1 th sensing device to the first preset duration to be used as the first frame recording time corresponding to the N-1 th sensing device; wherein N is a natural number greater than or equal to 2.
4. A data synchronization device, the device comprising: the device comprises a first sending module, a first receiving module and a synchronizing module; wherein, the liquid crystal display device comprises a liquid crystal display device,
the first sending module is used for periodically sending a time service request to the synchronous server; wherein, the time service request carries the identification of each sensing device;
the first receiving module is used for receiving a time service response returned by the synchronous server; the time service response carries a predetermined starting time stamp and a corresponding first frame recording time of each sensing device;
the synchronous module is used for setting the system time of the synchronous module according to the starting time and sending recording data according to the system time, the first frame recording time corresponding to each sensing device and a preset time interval;
the first frame recording time is determined according to the following mode:
when the synchronization server receives a time service request sent by a first sensing device, adding a first preset duration to the time for receiving the time service request sent by the first sensing device as a first frame recording time corresponding to the first sensing device;
when a synchronous server receives a time service request sent by an Nth sensing device, if the time for receiving the time service request sent by the Nth sensing device is smaller than the first frame recording time corresponding to the N-1 th sensing device minus a second preset duration, taking the first frame recording time corresponding to the N-1 th sensing device as the first frame recording time corresponding to the N-th sensing device; if the time of receiving the time service request sent by the N-1 th sensing device is greater than or equal to the first frame recording time corresponding to the N-1 th sensing device minus a second preset duration, adding the first frame recording time of the N-1 th sensing device to the first preset duration to be used as the first frame recording time corresponding to the N-1 th sensing device; wherein N is a natural number greater than or equal to 2.
5. The apparatus according to claim 4, wherein:
the synchronization module is specifically configured to take the system time as a start time of each sensing device, and send the recording data according to the predetermined time interval when a current time of each sensing device reaches a recording time of a first frame corresponding to each sensing device.
6. A data synchronization device, the device comprising: the device comprises a second receiving module, a calculating module and a second sending module; wherein, the liquid crystal display device comprises a liquid crystal display device,
the second receiving module is used for periodically receiving time service requests sent by the sensing devices; wherein, the time service request carries the identification of each sensing device;
the calculating module is used for calculating the first frame recording time corresponding to each sensing device according to the time of receiving the time service request sent by each sensing device;
the second sending module is used for returning time service responses to the sensing devices; the time service response carries a predetermined starting time stamp and a first frame recording time corresponding to each sensing device, so that each sensing device sets own system time according to the starting time, and transmits recording data according to the system time, the first frame recording time corresponding to each sensing device and a predetermined time interval;
The computing module is specifically configured to, when the synchronization server receives a time service request sent by a first sensing device, add a first preset duration to a time of receiving the time service request sent by the first sensing device as a first frame recording time corresponding to the first sensing device; when a synchronous server receives a time service request sent by an Nth sensing device, if the time for receiving the time service request sent by the Nth sensing device is smaller than the first frame recording time corresponding to the N-1 th sensing device minus a second preset duration, taking the first frame recording time corresponding to the N-1 th sensing device as the first frame recording time corresponding to the N-th sensing device; if the time of receiving the time service request sent by the N-1 th sensing device is greater than or equal to the first frame recording time corresponding to the N-1 th sensing device minus a second preset duration, adding the first frame recording time of the N-1 th sensing device to the first preset duration to be used as the first frame recording time corresponding to the N-1 th sensing device; wherein N is a natural number greater than or equal to 2.
7. An electronic device, comprising:
at least one processor; and
A memory communicatively coupled to the at least one processor; wherein, the liquid crystal display device comprises a liquid crystal display device,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the data synchronization method of any one of claims 1-3.
8. A non-transitory computer readable storage medium storing computer instructions for causing the computer to perform the data synchronization method of any one of claims 1-3.
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| CN108366283A (en) * | 2018-02-12 | 2018-08-03 | 苏州佳世达电通有限公司 | The media sync playback method of more equipment rooms |
| CN108683852A (en) * | 2018-05-23 | 2018-10-19 | 努比亚技术有限公司 | A kind of video recording method, terminal and computer readable storage medium |
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