CN112255906A

CN112255906A - Timing method, visual navigation aid equipment control method and related device

Info

Publication number: CN112255906A
Application number: CN202011021725.0A
Authority: CN
Inventors: 吴润涛; 杨嘉文; 狄东旭; 吕志明; 宋恒柱; 李民; 陈庚军
Original assignee: Shenzhen Star Standard Technology Co ltd
Current assignee: Shenzhen Star Standard Technology Co ltd
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2021-01-22
Anticipated expiration: 2040-09-25
Also published as: WO2022062670A1; CN112255906B

Abstract

The invention discloses a timing method, a visual navigation aid control method and a related device, wherein the timing method comprises the following steps: receiving a PPS signal sent by a GNSS system, performing pulse timing according to the PPS signal, and outputting a reset instruction and a first work timing instruction when the pulse timing is finished, wherein the reset instruction is used for controlling the first timer to reset and then to count again, and the first work timing instruction is used for controlling a second timer to execute the work cycle timing of controlled equipment; when the PPS signal is not received within the preset time, the pulse timing is interrupted, and a second working timing instruction is output when the timing of the first timer is finished, wherein the second working timing instruction is used for controlling the second timer to execute the working period timing of the controlled equipment; the timing length of the first timer is slightly longer than the timing length of the pulse timing. According to the timing method, the visual navigation aid equipment control method and the related device provided by the invention, the high-precision synchronization or sequence control requirements can be met.

Description

Timing method, visual navigation aid equipment control method and related device

Technical Field

The invention relates to the technical field of synchronization, in particular to a timing method, a visual navigation aid control method and a related device.

Background

In the process of synchronous control of a plurality of controlled devices, time asynchronization of each controlled device caused by various factors is difficult to avoid, and then each controlled device is difficult to achieve accurate synchronous control. Taking the visual navigation aid as an example, a certain number of visual navigation aids are generally required to be configured on buildings near airports, airports and the like, and the visual navigation aids need to synchronously flash or sequentially flash according to periods.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the invention aims to provide a timing method, a visual navigation aid control method and a related device.

To achieve the above object, a timing method according to an embodiment of the present invention includes:

receiving a PPS signal sent by a GNSS system and performing pulse timing according to the PPS signal;

outputting a reset instruction and a first work timing instruction when the pulse timing is finished, wherein the reset instruction is used for controlling the first timer to reset and then count again, and the first work timing instruction is used for controlling the second timer to execute the work cycle timing of the controlled equipment;

when the PPS signal is not received within the preset time, the pulse timing is interrupted, and a second working timing instruction is output when the timing of the first timer is finished, wherein the second working timing instruction is used for controlling the second timer to execute the working period timing of the controlled equipment;

wherein, the timing length of the first timer is slightly longer than the timing length of the pulse timing.

According to an embodiment of the present invention, the receiving PPS signals transmitted by a GNSS system and performing pulse timing according to the PPS signals includes:

receiving a plurality of PPS signals continuously transmitted by a GNSS system in a signal period;

acquiring the second number of each PPS signal, wherein the second number of the PPS signal is the time corresponding to the rising edge of the PPS signal;

and when the second number of the received one PPS signal reaches a preset value, ending the pulse timing.

According to an embodiment of the present invention, a difference between a timing length of the first timer minus a timing length of the pulse timing is 1 to 100 milliseconds.

According to an embodiment of the present invention, the first work timing instruction and the second work timing instruction are both used to control the second timer to start executing the work cycle timing of the controlled device, or,

and the timer is used for controlling the second timer to extend for a preset time length and then executing the working period timing of the controlled equipment.

In a second aspect, a visual navigational aid control method according to an embodiment of the present invention includes:

outputting a reset instruction and a first work timing instruction when the pulse timing is finished, wherein the reset instruction is used for controlling the first timer to reset and then count again, and the first work timing instruction is used for controlling the second timer to execute the flash period timing of the visual navigation aid;

when the PPS signal is not received within the preset time, the pulse timing is interrupted, and a second working timing instruction is output when the timing of the first timer is finished, wherein the second working timing instruction is used for controlling the second timer to execute the flash period timing of the visual navigation aid;

carrying out flash cycle timing according to the first work timing instruction or the second work timing instruction, and controlling the visual navigation aid to flash according to the frequency in the flash cycle;

According to one embodiment of the invention, the flash cycle timing according to the first duty timing command or the second duty timing command comprises:

controlling a second timer to start to execute flash cycle timing according to the first work timing instruction or the second work timing instruction, or,

and controlling a second timer to delay for a preset time according to the first work timing instruction or the second work timing instruction, and then executing flash cycle timing.

In a third aspect, a timepiece according to an embodiment of the invention includes:

the second receiving unit is used for receiving the PPS signal sent by the GNSS system and carrying out pulse timing according to the PPS signal;

and the third output unit is used for outputting a reset instruction and a first work timing instruction when the pulse timing is finished, wherein the reset instruction is used for controlling the first timer to reset and then count again, and the first work timing instruction is used for controlling the second timer to execute the work period timing of the controlled equipment.

The fourth output unit is used for outputting a second working timing instruction when the pulse timing is interrupted because the PPS signal is not received within the preset time and the timing of the first timer is finished, wherein the second working timing instruction is used for controlling the second timer to execute the flash period timing of the visual navigation aid;

the control unit is used for carrying out flash period timing according to the first work timing instruction or the second work timing instruction and controlling the visual navigation aid to flash according to the frequency in the flash period;

In a fourth aspect, a visual navigational aid control apparatus according to an embodiment of the present invention includes:

the third output unit is used for outputting a reset instruction and a first work timing instruction when the pulse timing is finished;

In a fifth aspect, the visual navigation aid according to an embodiment of the present invention includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the visual navigation aid control method as described above when executing the computer program.

According to the timing method, the visual navigation aid equipment control method and the related device provided by the invention, the PPS signal sent by the GNSS system is utilized for pulse timing, the reset instruction and the first working timing instruction are output when the pulse timing is finished, and the PPS signal can mark the whole second moment of UTC, so that the precision can reach nanosecond level, and the timing according to the PPS signal has higher precision, so that each controlled equipment can synchronously execute or sequentially execute actions when timing according to the first working timing instruction, for example, the controlled equipment is the visual navigation aid equipment, the synchronous execution or sequential execution precision of each visual navigation aid equipment can be higher, and the high-precision synchronization or sequential control requirement can be met. In addition, the reset instruction can control the first timer to be reset after the first timer is reset, so that the first timer and the pulse timing are kept in parallel, the pulse timing is interrupted when the PPS signal is not received within the preset time, and the second work timing instruction is output when the first timer is finished, so that when the PPS signal does not exist, the first timer can be used for timing, the controlled equipment can be ensured to execute work period timing according to the second work timing instruction, and the controlled equipment can work normally.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a diagram of an environment in which the timing method of the present invention may be used;

FIG. 2 is a flow chart of one embodiment of a timing method of the present invention;

FIG. 3 is a flow chart of step S101 of the timing method of the present invention;

FIG. 4 is a flow chart of one embodiment of a visual navigational aid control method of the present invention;

FIG. 5 is a schematic structural view of one embodiment of the timing device of the present invention;

FIG. 6 is a schematic diagram of a first receiving unit of the timing device of the present invention;

FIG. 7 is a schematic structural diagram of an embodiment of a control device of the visual navigational aid of the present invention;

FIG. 8 is a schematic diagram of a second receiving unit in the visual navigational aid control apparatus of the present invention;

fig. 9 is a schematic structural diagram of an embodiment of the visual navigational aid of the present invention.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the related art, when a plurality of controlled devices execute actions synchronously or sequentially, there is a large error, which results in poor synchronous execution effect or sequential execution, and in the case of a "visual navigation aid", for example, a predetermined number of visual navigation aids are usually configured near or in an airport to guide an aircraft to fly or land. Generally, according to aviation code requirements, a plurality of visual navigation aids in a certain area or a certain building can flash synchronously or in a preset sequence, so as to achieve warning and guiding functions. However, these visual navigation aids start to operate according to their own set duty cycles, but because the clock of each visual navigation aid has an error, it is difficult for each visual navigation aid to achieve accurate synchronization when performing synchronous blinking by using a certain time point of its own clock as a timing start point, and when performing sequential blinking, the delay time of each visual navigation aid is also inaccurate, which results in the sequential blinking not meeting the predetermined requirement.

Referring to fig. 1, the timing synchronization method provided in the present application may be applied to the application environment shown in fig. 1. The application environment may include a controlled device 100 and a GNSS system 200, and the controlled device 100 may establish a connection with the GNSS system 200 through a satellite network.

The GNSS system 200 may transmit PPS signals, one PPS signal per second, one signal cycle per minute, and 60 PPS signals per minute. The controlled device 100 may be various devices having a positioning module (e.g., a GPS module), such as a visual navigational aid, etc.

The controlled apparatus 100 performs a predetermined work within the work cycle. Taking the "visual navigation aid" as an example, in a work cycle, the visual navigation aid performs flashing operation according to a predetermined frequency, for example, if the work cycle is one minute, the visual navigation aid performs flashing operation for one minute, and if it is to be ensured that a plurality of visual navigation aids can synchronously operate within one minute of work cycle, it is to be ensured that starting points of the one minute of work cycle are the same.

In this application, the controlled device 100 may receive the PPS signal sent by the GNSS system 200 and perform pulse timing according to the PPS signal. When the pulse timing is finished, the reset instruction and the first work timing instruction are output, and the second timer of the controlled device 100 can be controlled to execute the work cycle timing of the controlled device by using the first work timing instruction. And the first timer can be controlled to count again after being reset by the reset instruction.

In addition, when the PPS signal is not received within the predetermined time, which results in the interruption of the pulse timing, and the first timer is timed out, a second duty timing command is output, and the second timer of the controlled device 100 can be controlled to perform duty cycle timing by using the second duty timing command.

The timing length of the first timer is slightly longer than the timing length of the pulse timing. As described above, since the reset instruction may control the first timer to be re-timed after being reset, the pulse timing and the first timer may be synchronously timed in parallel. In addition, the timing length of the first timer is slightly greater than the timing length of the pulse timing, so that when the pulse timing is normal, the first timer is reset before the timing end point is reached, and further, it is ensured that only the first work timing instruction is output and the second work timing instruction is not output when the pulse timing is normal.

In the application, the PPS signal sent by the GNSS system is utilized to perform pulse timing, and the reset instruction and the first working timing instruction are output when the pulse timing is finished, because the PPS signal can mark the whole second moment of UTC, the precision can reach nanosecond level, therefore, according to the PPS signal timing, the method has higher precision, so that each controlled device 100 can perform actions synchronously or sequentially according to the first working timing instruction timing, for example, the controlled device 100 is a visual navigation aid, the visual navigation aid can synchronously flash or flash sequentially, the synchronous or sequential execution precision is higher, and the high-precision synchronization or sequential control requirements can be met. In addition, the reset instruction may control the first timer to restart timing after the first timer is reset, so that the first timer is kept in parallel with the pulse timing synchronization, the pulse timing is interrupted when the PPS signal is not received within the predetermined time, and the second work timing instruction is output when the first timer finishes timing, so that when the PPS signal does not exist, the first timer can be used for timing, and the controlled device 100 can also be ensured to execute work cycle timing according to the second work timing instruction, so that the controlled device 100 can work normally.

Referring to fig. 2, fig. 2 is a flowchart illustrating an embodiment of a timing method provided by an embodiment of the present invention, and for convenience of description, only a portion related to the embodiment of the present invention is shown. Specifically, the method may be executed by a controlled device, and specifically includes:

s101, receiving a PPS signal sent by a GNSS system and performing pulse timing according to the PPS signal.

Specifically, the controlled device has a GNSS positioning module capable of receiving a PPS signal of a GNSS system, where one second pulse is sent one second for one minute, i.e., one signal period, and functions to indicate a time of the whole second, which is usually indicated by a rising edge of the PPS second pulse. Taking a GPS system as an example, the GPS system can provide the UTC time, and a user may delay the time when receiving the time, and in order to accurately provide the time, a rising edge of a PPS signal is introduced to mark the entire second time of the UTC, so that the accuracy is high, which can reach a nanosecond level, and there is no accumulated error, and therefore, the error of the PPS signal time received by each controlled device is very small.

As described above, since the PPS signal is transmitted one per second, the pulse timing can be performed based on the PPS signals received in sequence, and since the delay time of the PPS signal is small, the time error of the PPS signal received by each controlled device can be ensured to be very small, so that the pulse timing of each controlled device can maintain high synchronization accuracy.

It should be noted that the GNSS system may be, but not limited to, the american GPS system, the chinese beidou navigation system, the russian GLONASS system, the european union GALILEO system, the japanese QZSS system, and the indian IRNSS system, as long as the PPS signal can be transmitted.

And S102, outputting a reset instruction and a first working timing instruction when the pulse timing is finished, wherein the reset instruction is used for controlling the first timer to reset and then count again, and the first working timing instruction is used for controlling the second timer to execute the working period timing of the controlled equipment.

That is, when the PPS signal is used for timing and the timing is finished, the reset instruction and the first work timing instruction are output, and the first timer of the controlled device can be reset according to the reset instruction and then is used for timing again, so that the synchronization with the pulse timing is maintained. The second timer of the controlled device may perform duty cycle timing of the controlled device according to the first duty timing instruction.

It is understood that the first work timing instruction is used to control the second timer to start to execute the work cycle timing of the controlled device, that is, after the second timer of the controlled device receives the first work timing instruction, the second timer is controlled to start the work cycle timing immediately. Because the pulse timing synchronization precision of each controlled device is high, the starting point of the working period timing is highly synchronous when each controlled device starts working period timing according to the first working timing instruction, and further each controlled device can be ensured to keep synchronous working in the working period.

Or the first work timing instruction is used for controlling the second timer to extend for a preset time length and then executing the work cycle timing of the controlled equipment. That is, after receiving the first work timing instruction, the second timer of the controlled device delays the time according to the set preset time length, and then performs the timing of the work period after the delay is finished. Because the pulse timing synchronization precision of each controlled device is high, the delay starting points of the delay of each controlled device are also highly synchronous, and when the delay preset time lengths of each controlled device are different, each controlled device can work according to the preset sequence.

S103, when the PPS signal is not received within the preset time, the pulse timing is interrupted, and a second working timing instruction is output when the first timer finishes timing. Wherein, the timing length of the first timer is slightly longer than the timing length of the pulse timing.

In some cases, the controlled device may not receive the PPS signal transmitted by the GNSS system due to a communication failure between the GPS module of the controlled device and the GNSS system, and the like, and thus, in such a case, the pulse timing cannot be performed using the PPS signal. In order to ensure that the controlled device can still enter the working period in this case, in the present application, as described above, the first timer is synchronously timed with the pulse timing in parallel, and the timing length of the first timer is slightly longer than the timing length of the pulse timing.

When the PPS signal can be normally received, namely, when the pulse timing is normal, the first timer also normally carries out synchronous timing, and as the timing length of the first timer is slightly longer than the timing duration of the pulse timing, the pulse timing can be guaranteed to be ended first when the pulse timing is normal, the first work timing instruction and the reset instruction are guaranteed to be output, and as the reset instruction enables the first timer to be reset and then is re-timed, the first timer cannot reach the timing end point and cannot output the second work timing instruction. In other words, the timing length of the first timer is slightly longer than the timing duration of the pulse timing, so that it can be ensured that the first work timing instruction after the pulse timing is ended enters the work period for timing under the condition that the pulse timing is normal, and further, each controlled device can synchronously work or sequentially work.

When the pulse timing is interrupted, the pulse timing cannot be continued, that is, the reset instruction cannot be output, so that the first timer can continue to time until the timing end, that is, the first timer can normally finish timing, and therefore, the second work timing instruction which can be output after the timing of the first timer is finished can be output, so that after the pulse timing is interrupted, the second work timing instruction which is finished by the timing of the first timer can be used for entering the working period for timing, and further the controlled equipment can still continue to work after the pulse timing is interrupted, and only the precision of the synchronous or sequential work of each controlled equipment is slightly lower than that of the pulse timing.

In order to ensure the second timing instruction for the end of the timing of the first timer, the synchronous control precision for each controlled device may be set to be relatively small, and preferably, the difference between the timing length of the first timer and the timing length of the pulse timing is 1 to 100 milliseconds. The time of 1-100 millihairs is relatively short, so that the pulse timing can be firstly finished when the pulse timing works normally, and the synchronous control precision of the timing of the first timer can be ensured to reach millisecond level.

According to the timing method provided by the invention, the PPS signal sent by the GNSS system is utilized for pulse timing, and the reset instruction and the first working timing instruction are output when the pulse timing is finished, and the PPS signal can mark the whole second time of UTC, and the precision can reach nanosecond level, so that the timing according to the PPS signal has higher precision, and each controlled device can synchronously execute or sequentially execute actions when timing according to the first working timing instruction, for example, the controlled device is a visual navigation aid device, so that the synchronous flashing or sequential flashing of each visual navigation aid device can be realized, the synchronous execution or sequential execution precision is higher, and the high-precision synchronization or sequential control requirements can be met. In addition, the reset instruction can control the first timer to be reset after the first timer is reset, so that the first timer and the pulse timing are kept in parallel, the pulse timing is interrupted when the PPS signal is not received within the preset time, and the second work timing instruction is output when the first timer is finished, so that when the PPS signal does not exist, the first timer can be used for timing, the controlled equipment can be ensured to execute work period timing according to the second work timing instruction, and the controlled equipment can work normally.

Referring to fig. 3, in one embodiment of the present invention, step S101 includes:

s201, receiving a plurality of PPS signals continuously transmitted by the GNSS in a signal period.

As described above, the PPS signals transmitted by the GNSS system are transmitted one PPS signal per second, for example, one signal cycle is one minute (60 seconds), and then one PPS signal is transmitted from 0 th to 59 th seconds in the signal cycle of one minute, and each rising edge of the PPS signals corresponds to one second, for example, the second number of the 1 st PPS signal is 0, the second number of the 2 nd PPS signal is 1, the second number of the 3 rd PPS signal is 2, and the second number of the 60 th PPS signal is 59.

S202, acquiring the seconds of each PPS signal, wherein the seconds of the PPS signals are the time corresponding to the rising edge of the PPS signals.

Since the rising edge of the PPS signal is introduced into the GPS system to mark the whole second time of the UTC, the accuracy is high, and therefore, in step S202, the delay can be reduced by obtaining the number of seconds corresponding to the PPS signal.

And S203, when the seconds of the received PPS signal reaches a preset value, ending the pulse timing.

That is, after the PPS signal is received and the number of seconds of the PPS signal is acquired, the number of seconds is compared with a predetermined value, and when the number of seconds is equal to the predetermined value, that is, the predetermined value is reached, the pulse timing is ended, and the reset command and the first duty timing command are output. Taking the predetermined value as 59 seconds as an example, after the 60 th PPS signal is received, the number of seconds of the acquired 60 th PPS signal is 59, at this time, the number of seconds is equal to the predetermined value, that is, the predetermined value is reached, and then the reset instruction and the first work timing instruction are output. The controlled device controls the first timer to reset according to the reset instruction and then to count time in parallel with the pulse timing synchronization again, and the controlled device may control the second timer to perform duty cycle timing according to the first duty timing instruction, for example, control the second timer to immediately start timing of a duty cycle, or control the second timer to extend for a predetermined time length and then start timing of the duty cycle.

Further, when the number of seconds of the received PPS signal does not reach a predetermined value, a subsequent PPS signal continues to be received. That is, when the number of seconds has not reached the predetermined value, the controlled device continues to receive subsequent PPS signals, and acquires the number of seconds of these PPS signals, and compares the number of seconds with the preset value until the number of seconds of one PPS signal is equal to the preset value.

In this embodiment, the number of seconds for acquiring each PPS signal is used, and the number of seconds is used for pulse timing, so that the pulse timing is more accurate, the time delay is smaller, and the end of the pulse timing can be accurately judged.

Referring to fig. 4, fig. 4 is a flowchart illustrating an embodiment of a control method for a visual navigational aid according to an embodiment of the present invention, and for convenience of description, only the portions related to the embodiment of the present invention are shown. Specifically, the visual navigation aid control method may be executed by a visual navigation aid, and specifically includes:

s301, receiving a PPS signal sent by the GNSS system and performing pulse timing according to the PPS signal.

And S302, outputting a reset instruction and a first work timing instruction when the pulse timing is finished, wherein the reset instruction is used for controlling the first timer to reset and then count again, and the first work timing instruction is used for controlling the second timer to execute the flash period timing of the visual navigation aid.

And S303, when the PPS signal is not received within the preset time, the pulse timing is interrupted, and a second working timing instruction is output when the first timer finishes timing, wherein the second working timing instruction is used for controlling the second timer to execute the flash period timing of the visual navigation aid.

The steps S301 to S303 are the same as the steps S101 to S103 in the embodiment shown in fig. 1, and reference may be specifically made to the steps S101 and S102 in the embodiment shown in fig. 1, which are not repeated herein.

S304, carrying out flash cycle timing according to the first work timing instruction or the second work timing instruction, and controlling the visual navigation aid to flash according to the frequency in the flash cycle;

That is, after the first duty timing command is output after the pulse timing is finished or the second duty timing command is output after the timing of the timer is finished, the second timer of the visual navigation aid performs the timing of the flash period in response to the first duty timing command or the second duty timing command, and controls the light source of the visual navigation aid to blink and operate at a predetermined frequency within the flash period, for example, one flash period is 60 seconds and blink 40 times.

It will be appreciated that the timing of the flash cycle according to the first or second duty timing instructions may be: and controlling a timer to start to execute flash cycle timing according to the first work timing instruction or the second work timing instruction. Preferably, when there are a plurality of visual navigation aids, the visual navigation aids all count time with the timing reference point as a timing start point of a flash cycle, so that the visual navigation aids synchronously flash.

Alternatively, the flash cycle timing according to the first work timing instruction or the second work timing instruction may be: and controlling a timer to delay for a preset time according to the first work timing instruction or the second work timing instruction, and then executing the flash cycle timing. Preferably, the predetermined time length of the time delay of the plurality of visual navigation aids is different, so that the plurality of visual navigation aids sequentially execute the flashing work according to a predetermined sequence.

That is to say, the second timer of the visual navigation aid equipment can immediately start a flash cycle timing according to the first work timing instruction or the second work timing instruction, and when a plurality of visual navigation aid equipment start a flash cycle timing, each visual navigation aid equipment can simultaneously flash to work, thereby achieving the effect of synchronous flashing.

In addition, the second timer of the visual navigation aid device may delay the predetermined time according to the first work timing instruction or the second work timing instruction and then start timing a flash period, and the predetermined time of the delay may be set according to the control requirement. For a plurality of visual navigation aids, the preset time length of the time delay of each visual navigation aid can be different, so that each visual navigation aid can sequentially execute flashing work according to a preset sequence, and further, a sequential flashing effect is achieved.

According to the control method of the visual navigation aid equipment, the PPS signals sent by the GNSS system are utilized for pulse timing, the reset instruction and the first work timing instruction are output when the pulse timing is finished, and the PPS signals can mark the whole second time of UTC, so that the precision can reach nanosecond level. In addition, the reset instruction can control the first timer to be reset after the first timer is reset, so that the first timer and the pulse timing are kept in parallel, the pulse timing is interrupted when the PPS signal is not received within the preset time, and the second work timing instruction is output when the first timer is finished, so that when the PPS signal does not exist, the first timer can be used for timing, the controlled equipment can be ensured to execute work period timing according to the second work timing instruction, and the controlled equipment can work normally.

Referring to fig. 5, fig. 5 is a schematic structural diagram of an embodiment of the timing device according to the embodiment of the present invention, and for convenience of description, only the parts related to the embodiment of the present invention are shown. Specifically, the time synchronization device specifically includes:

the first receiving unit 501 is configured to receive a PPS signal sent by the GNSS system and perform pulse timing according to the PPS signal.

The first output unit 502 is configured to output a reset instruction and a first working timing instruction when the pulse timing ends, where the reset instruction is used to control the first timer to reset and then count again, and the first working timing instruction is used to control the second timer to perform working cycle timing of the controlled device.

A second output unit 503, configured to output a second working timing instruction when the pulse timing is interrupted due to that the PPS signal is not received within a predetermined time and the timing of the first timer is ended, where the second working timing instruction is used to control the second timer to perform the working cycle timing of the controlled device.

Referring to fig. 6, in an embodiment of the present invention, the first receiving unit 501 includes:

the first receiving module 5011 is configured to receive a plurality of PPS signals continuously transmitted by the GNSS system within one signal period.

The first obtaining module 5012 is configured to obtain seconds of each PPS signal, where the seconds of the PPS signal are times corresponding to rising edges of the PPS signal.

A first determining module 5013, configured to end the pulse timing when the number of seconds of the received one PPS signal reaches a predetermined value.

According to the timing device provided by the invention, the PPS signal sent by the GNSS system is utilized for pulse timing, and the reset instruction and the first working timing instruction are output when the pulse timing is finished, and the PPS signal can mark the whole second time of UTC, and the precision can reach nanosecond level, so that the timing according to the PPS signal has higher precision, and each controlled device can synchronously execute or sequentially execute actions when timing according to the first working timing instruction, for example, the controlled device is a visual navigation aid device, so that the synchronous flashing or sequential flashing of each visual navigation aid device can be realized, the synchronous execution or sequential execution precision is higher, and the high-precision synchronization or sequential control requirements can be met. In addition, the reset instruction can control the first timer to be reset after the first timer is reset, so that the first timer and the pulse timing are kept in parallel, the pulse timing is interrupted when the PPS signal is not received within the preset time, and the second work timing instruction is output when the first timer is finished, so that when the PPS signal does not exist, the first timer can be used for timing, the controlled equipment can be ensured to execute work period timing according to the second work timing instruction, and the controlled equipment can work normally.

Referring to fig. 7, fig. 7 is a schematic structural diagram of an embodiment of a control device of a visual navigational aid provided by an embodiment of the present invention, and for convenience of description, only the parts related to the embodiment of the present invention are shown. Specifically, the visual navigation aid device control apparatus specifically includes:

the second receiving unit 601 is configured to receive a PPS signal sent by the GNSS system and perform pulse timing according to the PPS signal.

A third output unit 602, configured to output a reset instruction and a first working timing instruction when the pulse timing ends, where the reset instruction is used to control the first timer to reset and then count again, and the first working timing instruction is used to control the second timer to perform working cycle timing of the controlled device.

A fourth output unit 603, configured to output a second working timing instruction when the pulse timing is interrupted due to non-reception of the PPS signal within a predetermined time and the timing of the first timer is ended, where the second working timing instruction is used to control the second timer to perform flash period timing of the visual navigation aid.

The control unit 604 is configured to perform flash cycle timing according to the first work timing instruction or the second work timing instruction, and control the visual navigation aid to flash according to a frequency in the flash cycle;

Referring to fig. 8, in an embodiment of the present invention, the second receiving unit 601 includes:

the second receiving module 6011 is configured to receive a plurality of PPS signals continuously transmitted by the GNSS system in one signal period.

A second obtaining module 6012, configured to obtain seconds of each PPS signal, where the seconds of each PPS signal are time corresponding to a rising edge of the PPS signal.

A second determining module 6013, configured to end the pulse timing when the number of seconds of the received one PPS signal reaches a predetermined value.

According to the visual navigation aid equipment control device provided by the invention, pulse timing is carried out by utilizing a PPS (pulse per second) signal sent by a GNSS (global navigation satellite system), and a reset instruction and a first working timing instruction are output when the pulse timing is finished. In addition, the reset instruction can control the first timer to be reset after the first timer is reset, so that the first timer and the pulse timing are kept in parallel, the pulse timing is interrupted when the PPS signal is not received within the preset time, and the second work timing instruction is output when the first timer is finished, so that when the PPS signal does not exist, the first timer can be used for timing, the controlled equipment can be ensured to execute work period timing according to the second work timing instruction, and the controlled equipment can work normally.

Referring to fig. 9, fig. 9 shows a visual navigation aid 300 provided by an embodiment of the present invention, which includes a memory 302, a processor 301, and a computer program 3021 stored in the memory 302 and executable on the processor 301, and when the processor 301 executes the computer program 3021, the visual navigation aid control method as described above is implemented.

Illustratively, the computer program 3021 may be partitioned into one or more modules/units that are stored in the memory 302 and executed by the processor 301 to implement the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing certain functions, which are used to describe the execution of the computer program 3021 in the computer device 300.

The visual navigational aid 300 may include, but is not limited to, a processor 301, a memory 302. It will be understood by those skilled in the art that the figures are merely examples of the visual navigational aid 300 and do not constitute a limitation of the visual navigational aid 300, and may comprise more or less components than those shown, or some components in combination, or different components, e.g. the visual navigational aid 300 may further comprise input output devices, network access devices, buses, etc.

The Processor 301 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete Gate or transistor logic, discrete default hardware components, and so on. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The memory 302 may be an internal storage unit of the visual navigation aid 300, such as a hard disk or a memory of the visual navigation aid 300. The memory 302 may also be an external storage device of the visual navigation aid 300, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), or the like, which is provided on the visual navigation aid 300. Further, the memory 302 may also include both an internal storage unit and an external storage device of the visual navigation aid 300. The memory 302 is used to store the computer program 3021 and other programs and data required by the visual navigational aid 300. The memory 302 may also be used to temporarily store data that has been output or is to be output.

An embodiment of the present invention also provides a computer storage medium, on which a computer program 3021 is stored, which when executed by the processor 301 implements the visual navigational aid control method as described above.

The computer program 3021 may be stored in a computer-readable storage medium, and when executed by the processor 301, the computer program 3021 may implement the steps of the method embodiments described above. The computer program 3021 comprises, among other things, computer program code, which may be in the form of source code, object code, an executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like.

It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media which may not include electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.

The steps in the method of the embodiment of the invention can be sequentially adjusted, combined and deleted according to actual needs.

The modules or units in the system of the embodiment of the invention can be combined, divided and deleted according to actual needs.

Those of ordinary skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic pre-set hardware or in a combination of computer software and electronic pre-set hardware. Whether these functions are performed by pre-determined hardware or software depends on the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

In the embodiments provided herein, it should be understood that the disclosed apparatus/visual navigational aid 300 and method may be implemented in other ways. For example, the above-described embodiments of the apparatus/visual navigational aid 300 are merely illustrative, and for example, the division of the modules or units is merely a logical division, and other divisions may be realized in practice, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.

Claims

1. A method of timing, comprising:

2. The timing method of claim 1, wherein the receiving PPS signals transmitted by the GNSS system and performing pulse timing based on the PPS signals comprises:

3. The timing method according to claim 2, wherein a difference between a timing length of the first timer minus a timing length of the pulse timing is 1 to 100 milliseconds.

4. A timing method according to claim 3, wherein the first and second working timing instructions are used to control the second timer to start the execution of the working cycle timing of the controlled device, or,

5. A visual navigational aid control method, comprising:

6. The visual navigational aid control method of claim 5, wherein the receiving PPS signals transmitted by the GNSS system and the pulse timing based on the PPS signals comprises:

7. The visual navigational aid control method of claim 5, wherein the timing a flash cycle in accordance with the first or second work timing instructions comprises:

8. A time keeping device, comprising:

the first receiving unit is used for receiving a PPS signal sent by the GNSS system and carrying out pulse timing according to the PPS signal;

the first output unit is used for outputting a reset instruction and a first work timing instruction when the pulse timing is finished, wherein the reset instruction is used for controlling the first timer to reset and then count again, and the first work timing instruction is used for controlling the second timer to execute the work period timing of the controlled equipment;

the second output unit is used for outputting a second working timing instruction when the pulse timing is interrupted because the PPS signal is not received within the preset time and the timing of the first timer is ended, wherein the second working timing instruction is used for controlling the second timer to execute the working period timing of the controlled equipment;

9. A visual navigational aid control apparatus, comprising:

the third output unit is used for outputting a reset instruction and a first work timing instruction when the pulse timing is finished, wherein the reset instruction is used for controlling the first timer to reset and then count again, and the first work timing instruction is used for controlling the second timer to execute the work cycle timing of the controlled equipment;

10. A visual navigational aid comprising a memory, a processor and a computer program stored on said memory and executable on said processor, characterized in that said processor implements the visual navigational aid control method according to any of the claims 5 to 7 when executing said computer program.