CN115981135A - Military vehicle-mounted time system equipment, control method thereof and time system processing board - Google Patents
Military vehicle-mounted time system equipment, control method thereof and time system processing board Download PDFInfo
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Abstract
The invention discloses military vehicle-mounted time system equipment, a control method thereof and a time system processing board, wherein the control method of the military vehicle-mounted time system equipment comprises the following steps: acquiring an external clock signal and a local clock signal, wherein the external clock signal comprises a Beidou external clock signal and an equipment external clock signal; according to the military vehicle-mounted time system equipment control method, the abnormal conditions of the external clock are divided into two conditions, namely the Beidou external clock signal is abnormal and the equipment external clock signal is not abnormal, and the Beidou external clock signal is abnormal and the equipment external clock signal is abnormal, and the signal source outputting the time service signal is correspondingly switched and controlled under the two abnormal conditions; and when the Beidou external clock signal is obtained again, whether the calculated stable value of the newly received Beidou external signal is matched with the actual stable value or not is judged through the stable value of the newly received Beidou external signal, and the clock synchronization source can be switched according to the matching result. The invention improves the stability of the time service function of military vehicle-mounted time management equipment.
Description
Technical Field
The invention relates to the technical field of military vehicle-mounted time system equipment, in particular to military vehicle-mounted time system equipment, a control method thereof and a time system processing board.
Background
At present, military vehicles need to carry time system equipment to realize communication with the Beidou satellite, so that Beidou external clock signals output by the Beidou satellite and equipment external clock signals output by the external clock equipment are acquired in real time to realize the time service function of the time system equipment.
However, the military vehicle has strong activity, and the communication with the Beidou satellite is influenced by external environment and human factors, so that the time service function stability of the military vehicle-mounted time system equipment is poor.
Disclosure of Invention
The invention mainly aims to provide military vehicle-mounted time system equipment, and aims to solve the problem that the military vehicle-mounted time system equipment has poor time service function stability due to extremely complex surrounding environment of a military vehicle.
In order to achieve the above object, the present invention provides a military vehicle-mounted time system device, wherein the control method of the military vehicle-mounted time system device comprises:
acquiring an external clock signal and a local clock signal, wherein the external clock signal comprises a Beidou external clock signal and an equipment external clock signal;
determining an abnormal condition of an external clock signal;
when the abnormal condition of the external clock signal is determined to be that the Beidou external clock signal is abnormal and the external clock signal of the equipment is not abnormal, determining whether the number of the external clock signals of the equipment is multiple or not; when the number of the external clock signals of the equipment is determined to be multiple, acquiring the signal type of the external clock signal of each equipment, and determining the external clock signal of the equipment with the highest priority in the external clock signals of the equipment according to the signal types of the external clock signals of the equipment and the preset mapping relation between the types of the external clock signals of the equipment and the priority; carrying out input signal processing on the equipment external clock signal with the highest priority, determining a time service signal according to the equipment external clock signal with the highest priority after input signal processing, and carrying out output signal processing on the determined time service signal and then outputting the time service signal; and taking the device external clock signal with the highest priority processed by the input signal as a clock synchronization source of the local clock signal so as to enable the local clock signal to track and lock the device external clock signal with the highest priority processed by the input signal;
when the abnormal condition of the external clock signal is determined to be the Beidou external clock signal abnormality and the equipment external clock signal is both abnormal, switching to the local clock signal of the equipment external clock signal with the highest priority processed according to the tracking locking input signal, determining to output the time service signal, and outputting the determined time service signal after the output signal processing;
the military vehicle-mounted time system equipment control method further comprises the following steps: when the Beidou external clock signal is obtained again, the actual stable value of the time service signal output in the preset period is obtained; determining a calculation stable value of a time service signal output according to the newly acquired Beidou external clock signal in a preset period according to the newly acquired Beidou external clock signal; determining whether the calculated stable value matches the actual stable value; when the calculated stable value is determined to be matched with the actual stable value and a clock source switching signal is received, switching to input signal processing for newly acquiring a Beidou external clock signal, determining a time service signal according to the newly acquired Beidou external clock signal after the input signal processing, and outputting the determined time service signal after output signal processing; and the Beidou external clock signal obtained again after the input signal is processed is used as a clock synchronization source of the local clock signal and the external clock signal of each device, so that the local clock signal and the external clock signal of each device are tracked, locked and input signals are processed, and then the Beidou external clock signal is obtained again.
Optionally, the input signal processing comprises an input transmission delay compensation process and a digital filtering process.
Optionally, the determined time service signal is output after being processed by an output signal, specifically:
and acquiring a stable value of the time service signal output in a preset period, and outputting the determined time service signal after synchronous processing according to the stable value so as to output the output time service signal after synchronizing the output time service signal with the stable value.
Optionally, when it is determined that any one of the Beidou external clock signal and the device external clock signal is not abnormal, it is determined that the external clock signal is not abnormal.
Optionally, the military vehicle-mounted time system equipment control method includes:
and adjusting the priority of the external clock signal of each device according to the received priority adjusting signal.
The invention also provides a time system processing board, which is applied to military vehicle-mounted time system equipment and comprises the following components:
a memory; and the number of the first and second groups,
a processor, a military vehicle-mounted time system device control program stored on the memory and executed by the processor, the military vehicle-mounted time system device control program, when executed by the processor, implementing the military vehicle-mounted time system device control method as described above.
The invention also provides military vehicle-mounted time system equipment which comprises the time system processing board.
According to the technical scheme, the abnormal conditions of the external clock are divided into two conditions that the Beidou external clock signal is abnormal and the equipment external clock signal is not abnormal, and the Beidou external clock signal is abnormal and the equipment external clock signal is abnormal, and the signal source outputting the time service signal is correspondingly switched and controlled under the two abnormal conditions; and when the Beidou external clock signal is obtained again, whether the calculated stable value of the Beidou external signal is matched with the actual stable value is judged through the stable value of the newly received Beidou external signal, and the clock synchronization source is further switched according to the matching result. The control method of the military vehicle-mounted time system equipment can reduce the influence of the surrounding environment of the military vehicle on the output time signal, so that the military vehicle-mounted time system equipment can continuously and uninterruptedly output the stable time signal to the back-end function module no matter the external clock signal is abnormal or abnormal, the stability of the time service function of the military vehicle-mounted time system equipment, particularly the military vehicle-mounted time system equipment is greatly improved, and the problem that the time service function stability of the military vehicle-mounted time system equipment is poor due to the fact that the surrounding environment of the military vehicle is extremely complex is solved.
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 schematic flow chart illustrating a control method of military vehicle-mounted time system equipment according to an embodiment of the present invention;
FIG. 2 is a diagram of a hardware operating environment of an embodiment of a system processing board according to the invention.
The reference numbers illustrate:
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
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides military vehicle-mounted time system equipment.
For military vehicles, time system equipment is often required to be carried to realize communication with the Beidou satellite, so that an external clock signal output by the Beidou satellite is acquired in real time to realize a time service function of the time system equipment. However, for military vehicles, since military vehicles are usually in an abnormal natural environment or an abnormal artificial environment with strong signal shielding, strong signal interference and more deceptive signals, it is extremely easy to cause the external clock signal received by the vehicle to be interfered, for example, the vehicle receives a weak and unstable external clock signal, or even the vehicle does not receive the external clock signal. Thus, for military vehicle-mounted time system equipment, under the condition that the external clock signal is interfered, the time service signal output to other functional modules by the military vehicle-mounted time system equipment according to the external clock signal is also seriously interfered, namely, the time service function stability of the military vehicle-mounted time system equipment is poor, so that other functional modules work abnormally, and the military vehicle is not favorable for being used in the natural environment or the artificial environment.
In order to solve the above problem, referring to fig. 1, the military vehicle-mounted time system device control method includes:
and step S100, acquiring an external clock signal and a local clock signal.
The execution subject of the control method provided by the embodiment of the application can be a time system processing board in military vehicle-mounted time system equipment. The external clock signal in this embodiment may include: big dipper external clock signal and equipment external clock signal. The time system processing board can be in wireless communication connection with the Beidou satellite through a wireless communication circuit and an antenna; the antenna can receive the Beidou satellite signals, is in a corresponding frequency band, is in an electromagnetic wave form and is used for receiving Beidou external clock signals, can convert the electromagnetic wave form external clock signals into electric signals and then outputs the electric signals to the wireless communication circuit, and outputs the electric signals to the time system processing board after the electric signals are processed by the wireless communication circuit so that the time system processing board can obtain the Beidou external clock signals. The military vehicle-mounted time system equipment can also be provided with at least one external equipment interface, and each external equipment interface can be used for being connected with an external clock equipment so as to access a clock signal output by the external clock equipment, namely the equipment external clock signal and output the equipment external clock signal to the time system processing board, so that the time system processing board can obtain the equipment external clock signal. It should be noted that the external clock device is a stand-alone device that can be provided separately from the military onboard time system device.
Local time sources such as crystal oscillators, atomic clocks and the like can be arranged in the military vehicle-mounted time system equipment, wherein the atoms can be realized by rubidium atomic clocks. The time system processing board can be connected with the local time source through circuit board wiring or signal lines so as to access a local clock signal output by the local time source.
Step S200, when the external clock signal is determined to be abnormal, determining the abnormal condition of the external clock;
the external clock signal abnormality is at least one of disturbance of the external clock signal and loss of the external clock signal, and is not limited herein. The time system processing board can detect the signal parameters of the output signals of the wireless communication circuit or the external equipment interface in real time, and can match the detected signal parameters with corresponding parameter thresholds or parameter intervals to judge whether the currently accessed external clock signals are abnormal or not. For example, the timing processing board may be pre-integrated with a first parameter interval, a second parameter interval, a third parameter interval, and a fourth parameter interval, wherein a maximum signal parameter in the first parameter interval is not greater than a minimum signal parameter in the second parameter interval, a maximum signal parameter in the second parameter interval is not greater than a minimum signal parameter in the third parameter interval, and a maximum signal parameter in the third parameter interval is not greater than a minimum signal parameter in the fourth parameter interval; the time system processing board can determine that the external clock signal is lost when the detected signal parameter is determined to be matched with the first parameter interval; when the detected signal parameter is determined to be matched with the second parameter interval or the fourth parameter interval, determining that the external clock signal is interfered; and determining that the external clock signal is normal when the detected signal parameter is determined to match the third parameter interval. The signal parameter may include at least one of a signal current, a signal voltage, a signal power, a signal timing, and a signal waveform, which is not limited herein;
the time system processing board can determine whether the Beidou external clock signal and the equipment external clock signal are both abnormal or not, and can determine that the external clock signal is abnormal when the determination result is that any one of the Beidou external clock signal and the equipment external clock signal is abnormal; and when the determined result is that neither the Beidou external clock signal nor the equipment external clock signal is abnormal, determining that the external clock signal is not abnormal. Therefore, when it is ensured that all external clock signals are abnormal, the step S300 or the step S400 is switched to be executed to ensure that the external clock signals are used as much as possible to output the timing signals, which is favorable for improving the accuracy of the timing signals.
In practical use, since the environment of the military vehicle is changed rapidly when the military vehicle moves, even in a normal natural environment or a normal man-made environment, the external clock signal received by the timing system processing board may have a fluctuation, and thus, in one embodiment, the determination of whether the external clock signal is abnormal is whether the external clock signal is lost.
Step S300, if the abnormal condition of the external clock signals is that the Beidou external clock signals are abnormal and the external clock signals of the equipment are not abnormal, determining whether the number of the external clock signals of the equipment is multiple or not; when the number of the external clock signals of the equipment is determined to be multiple, acquiring the signal type of the external clock signal of each equipment, and determining the external clock signal of the equipment with the highest priority in the external clock signals of the equipment according to the signal types of the external clock signals of the equipment and the preset mapping relation between the types of the external clock signals of the equipment and the priority; performing input signal processing on the equipment external clock signal with the highest priority, determining a time service signal according to the equipment external clock signal with the highest priority after the input signal processing, and outputting the determined time service signal after the output signal processing; and taking the device external clock signal with the highest priority processed by the input signal as a clock synchronization source of the local clock signal so as to enable the local clock signal to track and lock the device external clock signal with the highest priority processed by the input signal.
In this embodiment, the timing processing board may perform, when it is determined that the external clock signal is not abnormal, corresponding signal processing, that is, input signal processing, on the external clock signal of the accessed electrical signal to obtain a stable and standard external clock signal after the signal processing, may run a pre-integrated hardware circuit and a software program or algorithm to generate a time service signal according to the stable and standard external clock signal after the signal processing, and may perform signal processing on the generated time service signal, that is, output the signal processed and output to the back-end function module, so as to improve stability and ripple resistance of the time service signal received by the back-end function module. For convenience of explanation, a signal obtained by processing an input signal when an external clock signal is normal is defined as an intermediate external clock signal. Because the external clock signal is not abnormal at this moment, the timing processing board can set the stable and standard external clock signal after the input signal processing and the intermediate external clock signal as the clock synchronization source of the local clock signal, so as to modulate the accessed local clock signal according to the intermediate external clock signal, so that the modulated local clock signal can keep consistent with the intermediate external clock signal in real time, thereby realizing that the local clock signal tracks and locks the external clock signal after the input signal processing, and the timing processing board can be switched to use when the external clock signal is abnormal.
The time system processing board can determine whether the abnormal condition of the external clock signal is the Beidou external clock signal abnormality or not when the external clock signal is abnormal, but the equipment external clock signal is not abnormal, and can further determine whether the equipment external clock signal at the moment is one or more when the abnormal condition is the Beidou external clock signal and the abnormal condition is the equipment external clock signal.
If the number of the external clock signals of the device is one, the time system processing board can directly perform input signal processing on the external clock signals of the device so as to determine to generate time service signals according to the external clock signals of the device after the input signal processing. If there are multiple external clock signals, the timing processing board can determine the signal type of each external clock signal and call a pre-stored mapping relationship between the type of the external clock signal and the priority of each signal type to determine the priority of each signal type. The timing processing board can sequence or compare the priorities of the signal types to determine the signal type with the highest priority and the corresponding device external clock signal, and the timing processing board can only perform input signal processing on the device external clock signal with the highest priority and can determine to generate a timing signal according to the processed device external clock signal with the highest priority. The preset device external clock signal type-priority mapping relation can be set by measuring the anti-interference performance of device external clock signals of various signal types in advance, wherein the priority of various signal types can be in direct proportion to the anti-interference performance of the device external clock signals of various signal types, namely, the higher the anti-interference performance is, the higher the priority corresponding to the signal type of the device external device is, the lower the anti-interference performance is. Therefore, when the Beidou external clock signal is abnormal, the time system processing board is preferentially switched to the external clock signal with the highest anti-interference performance to generate the time service signal, and the accuracy of the time service signal after switching is improved.
At this time, the timing processing board may perform input signal processing only on the device external clock signal with the highest priority to obtain an intermediate external clock signal, and may set the intermediate external clock signal as a clock synchronization source of the local clock signal, so as to modulate the accessed local clock signal according to the intermediate external clock signal, so that the modulated local clock signal may be consistent with the intermediate external clock signal in real time. At this time, the time system processing board may further use the device external clock signal with the highest priority processed by the input signal as a synchronization source of the device external clock signals with other priorities, so that the device external clock signals with other priorities can track and lock the device external clock signal with the highest priority processed by the input signal. In another optional embodiment, the timing system processing board may further determine whether the device external clock signal currently performing the input signal processing is abnormal, and may switch to another device external clock signal having the second highest priority or the same priority for performing the input signal processing when determining the abnormality. Therefore, the time system processing board can be switched to generate the time service signal according to the external clock signal of the equipment with the signal type with the highest current anti-interference performance, and the accuracy and the stability of the time service signal are improved.
The time system processing board can only carry out input signal processing on the external clock signal of the equipment with the highest priority to obtain an intermediate external clock signal, and can set the intermediate external clock signal as a clock synchronization source of the local clock signal so as to modulate the accessed local clock signal according to the intermediate external clock signal, so that the modulated local clock signal can keep consistent with the intermediate external clock signal in real time. At this time, the time system processing board may further use the device external clock signal with the highest priority processed by the input signal as a synchronization source of the device external clock signals with other priorities, so that the device external clock signals with other priorities can track and lock the device external clock signal with the highest priority processed by the input signal. In another optional embodiment, the timing system processing board may further determine whether the device external clock signal currently performing the input signal processing is abnormal, and may switch to another device external clock signal having the second highest priority or the same priority for performing the input signal processing when determining the abnormality. Therefore, the time system processing board can be switched to generate the time service signal according to the external clock signal of the equipment with the signal type with the highest current anti-interference performance, and the accuracy and the stability of the time service signal are improved.
Step S400, if the abnormal condition of the external clock signal is that the Beidou external clock signal is abnormal and the equipment external clock signal is both abnormal, switching to the local clock signal of the equipment external clock signal with the highest priority processed according to the tracking lock input signal, determining to output a time service signal, and outputting the determined time service signal after the output signal processing;
the time system processing board can switch to generate a time service signal according to a local clock signal which is consistent with the middle external clock signal when the external clock signal is determined to be abnormal, and can output the generated time service signal to the back-end functional module after performing output signal processing on the generated time service signal, so that the clock signal can be output in a seamless switching manner. Because the abnormal natural environment and artificial environment hardly affect the local time source, when the external clock signal is abnormal, the local clock signal is not affected by the abnormal environment, and meanwhile, because the local clock signal accessed by the time system processing board is modulated to be consistent with the intermediate external clock signal, after switching, the time service signal generated by the time system processing board according to the local clock signal is also consistent with the time service signal determined according to the intermediate external clock signal. The time system processing board can also record and store the modulation process of the local clock signal according to the intermediate external clock signal when the external clock signal is abnormal, and call the stored modulation process to modulate the subsequently accessed local clock signal when the external clock signal is abnormal, so that the subsequently modulated local clock signal can still keep consistent with the intermediate external clock signal in real time, and the stable generation of the intermediate external clock signal can be maintained when the external clock signal is abnormal.
In practice, military vehicles are in a complicated environment, and the interference immunity of the external clock signals of the devices of various signal types is measured in advance and changed along with the change of the environment, so that the external clock signal of the device of the current highest priority signal type is not the external clock signal with the highest interference immunity. In order to solve the problem, the military vehicle-mounted time system equipment control method is further provided with a step S500, and the step S500 comprises the following steps:
when the Beidou external clock signal is obtained again, the actual stable value of the time service signal output in the preset period is obtained; determining a calculation stable value of a time service signal output according to the newly acquired Beidou external clock signal in a preset period according to the newly acquired Beidou external clock signal; determining whether the calculated stable value matches the actual stable value; when the calculated stable value is determined to be matched with the actual stable value and a clock source switching signal is received, switching to input signal processing for newly acquiring a Beidou external clock signal, determining a time service signal according to the newly acquired Beidou external clock signal after the input signal processing, and outputting the determined time service signal after output signal processing; and the Beidou external clock signal acquired again after the input signal is processed is used as a clock synchronization source of the local clock signal and the external clock signal of each device, so that the local clock signal and the external clock signal of each device are tracked, locked and processed to acquire the Beidou external clock signal again.
In this embodiment, the timing processing board may continuously reacquire the big dipper external clock signal after determining that the big dipper external clock signal is lost, and may determine the timing signal according to the highest priority device external clock signal or the local clock signal. The time system processing board may obtain a signal amplitude of the output time signal once every preset time interval in a preset period after the Beidou external clock signal is obtained again, and may perform corresponding calculation, such as averaging calculation, on the signal amplitudes of the time signals obtained in the preset period after the preset period is ended, and may use the operation result as a stable value, i.e., an actual stable value, of the time signal output in the preset period. The time system processing board can also simultaneously perform input signal processing on the newly acquired Beidou external clock signal to obtain an intermediate external clock signal (denoted as calculating the intermediate external clock signal for representing the difference), and can determine to generate a time signal according to the calculated intermediate external clock signal (denoted as calculating the time signal for representing the difference). The time system processing board may obtain a signal amplitude of the output calculation time signal at every preset time interval in the preset period, and may perform corresponding calculation, such as averaging calculation, on the signal amplitudes of the calculation time signals obtained in the preset period after the preset period is ended, and may take the operation result as a stable value of the calculation time signal output in the preset period, that is, calculate a stable value. The time system processing board can perform corresponding operation on the actual stable value and the calculated stable value, for example, after subtraction operation, whether the operation result reaches a preset value is determined, and when the operation result reaches the preset value, the calculated stable value is determined to be matched with the actual stable value; and when the operation result is determined not to reach the preset value, determining that the calculated stable value is not matched with the actual stable value. The preset value may be zero or a smaller value.
When the calculated value is determined to be matched with the actual stable value, the time system processing board can control the corresponding prompt device to send prompt information so that an operator in the carriage can know that the newly-accessed Beidou external clock signal is stable and correct, the operator can output a clock source switching signal to the time system processing board by triggering the adjusting panel after knowing the clock source switching signal, and the time system processing board can switch a processing object processed by an input signal into the newly-acquired Beidou external clock signal after receiving the clock source switching signal so as to generate a middle external clock signal and a subsequent time service signal. The system processing board also uses the obtained intermediate external clock signal as a clock synchronization source of the external clock signal of each device, so that the local clock signal and the external clock signal of each device can be consistent with the regenerated intermediate external clock signal after switching. The round trip so, no matter whether big dipper external clock signal is unusual, all can make time system handle the board and continuously output and big dipper external clock signal assorted time service signal to be favorable to improving the stability of time service function.
And when the calculated value is not matched with the actual stable value, the time system processing board can continue to perform input signal processing on the device external clock signal with the highest priority so as to determine a time service signal according to the device external clock signal with the highest priority after the input signal processing, and the device external clock signal with the highest priority after the input signal processing is used as a synchronization source of the local clock signal so that the local clock signal tracks and locks the device external clock signal with the highest priority after the input signal processing.
So, can reduce the influence of the surrounding environment that military vehicle locates of the time service signal of output, make for military vehicle-mounted time system equipment no matter when external clock signal is unusual or non-unusual, all can last, incessant output stable time service signal to rear end function module, very big improvement for military vehicle-mounted time system equipment, especially for military vehicle-mounted time system equipment time service function's stability for military use stability, thereby solved military vehicle-mounted time system equipment because of the surrounding environment that military vehicle locates is very complicated, and lead to the relatively poor problem of time service function stability.
Referring to fig. 1, the input signal processing includes an input transmission delay compensation process and a digital filtering process.
In practical application, no matter the Beidou external clock signal or the equipment external clock signal accessed by the time system processing board, a random signal jump phenomenon exists, so that an error exists between the generated intermediate external clock signal and the output time service signal. Aiming at the problem, according to the technical scheme, the accessed external clock signal is subjected to transmission delay compensation processing to eliminate the signal jump of the external clock signal caused by transmission delay, and the accessed external clock signal is subjected to digital filtering processing to filter the clutter in the external clock signal, so that the signal jump caused by the clutter is eliminated. Therefore, the signal jump phenomenon of the external clock signal can be eliminated, and the accuracy of the generated intermediate external clock signal and the output time service signal is improved.
Referring to fig. 1, the specific time signal is output after being processed by an output signal, specifically:
and acquiring a stable value of the time service signal output in a preset period, and outputting the determined time service signal after synchronous processing according to the stable value so as to output the output time service signal after synchronizing the output time service signal with the stable value.
The working phase of the time service signal output by the time system processing board can comprise a plurality of preset cycles which are executed in sequence. The timing processing board may obtain a signal amplitude of the output timing signal every preset time interval in a preset period, and may perform corresponding calculation, such as averaging calculation, on the signal amplitudes of the timing signals obtained in the preset period after the preset period is ended, and may take the operation result as a stable value of the timing signal output in the preset period. In the next preset period, that is, when the next preset period is not finished, the timing processing board can adjust the timing signal determined in the preset period according to the stable value of the timing signal in the previous preset period, so that the adjusted timing signal determined in the preset period can be equal to the stable value of the timing signal in the previous preset period, and therefore synchronous processing of the timing signal is achieved. The method specifically comprises the following steps: the time system processing board can calculate the difference value between the signal amplitude of the time signal in the preset period and the stable value of the time signal in the previous preset period, and can correspondingly reduce the signal amplitude of the time signal according to the difference value calculation result when the difference value calculation result is a positive value, so that the reduced signal amplitude is equal to the stable value; when the difference calculation result is a negative value, correspondingly increasing the signal amplitude of the time service signal according to the difference calculation result so as to enable the increased signal amplitude to be equal to the stable value; and when the difference value calculation result is zero, the signal amplitude of the time service signal is not adjusted. It can be understood that, the timing processing board synchronously processes the timing signal in the next preset period, and simultaneously calculates a stable value of the timing signal output in the next preset period. In the first preset period, the time service signal acquired in the first preset period can be synchronized with a preset stable value. The time service signals output in each preset period are the same and are preset stable values, so that the output stability of the time service signals is improved.
In practice, military vehicles are in a complicated environment, and the interference immunity of the external clock signals of the devices of various signal types is measured in advance and changed along with the change of the environment, so that the external clock signal of the device of the current highest priority signal type is not the external clock signal with the highest interference immunity. Aiming at the problem, the military vehicle-mounted time system equipment control method comprises the following steps:
and adjusting the priority of the external clock signal of each device according to the received priority adjusting signal.
The military vehicle can also be provided with a special adjusting panel which can be in communication connection with the time system processing board, and the adjusting panel can be used for triggering and adjusting the priority of the clock signal outside each device by a user and outputting a priority adjusting signal to the time system processing board in response to the triggering of the user. The time system processing board can determine external clock signals of each target device to be adjusted and priority adjustment quantity corresponding to each target external clock device according to the received priority adjustment signals; the time system processing board can increase or decrease the current priority of each target device external clock signal by the corresponding priority adjustment amount according to the determination result, and can perform input signal processing on the adjusted device external clock signal with the highest priority to be used as a synchronization source of the local clock signal, so that the local clock signal tracks and locks the device external clock signal with the highest priority after the input signal processing.
Therefore, operators in the carriage can flexibly and manually adjust the priority of the external clock signal of each device according to the environment and experience of the military vehicle, so that the external clock signal of the device for processing the input signal is switched, and the use flexibility of the vehicle-mounted time system control method is favorably improved.
The invention also provides a time system processing board which is applied to military vehicle-mounted time system equipment.
Referring to fig. 2, the time system processing board includes:
a memory 11; and (c) a second step of,
a processor 12, a military on-board time system device control program stored on the memory 11 and executed by the processor 12, the military on-board time system device control program, when executed by the processor 12, implementing the military on-board time system device control method as described above.
The specific steps of the military vehicle-mounted time system device control method refer to the above embodiments, and the motor controller adopts all technical solutions of all the above embodiments, so that the method at least has all beneficial effects brought by the technical solutions of the above embodiments, and details are not repeated here. The memory 11 may be a high-speed RAM memory, or may be a non-volatile memory (e.g., a magnetic disk memory), and the memory 11 may optionally be a storage device independent from the control device; the processor 12 may be a CPU. The memory 11 and the processor 12 are connected by a communication bus 13, and the communication bus 13 may be a UART bus or an I2C bus.
The present invention further provides a military vehicle-mounted time system device, where the military vehicle-mounted time system device includes a time system processing board, and a specific structure of the time system processing board refers to the foregoing embodiments.
The above description is only an alternative embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, which are within the spirit of the present invention, are included in the scope of the present invention.
Claims (7)
1. A military vehicle-mounted time system equipment control method is characterized by comprising the following steps:
s100, obtaining an external clock signal and a local clock signal, wherein the external clock signal comprises a Beidou external clock signal and an equipment external clock signal;
s200, when the external clock signal is determined to be abnormal, determining the abnormal condition of the external clock;
s300, if the abnormal condition of the external clock signals is that the Beidou external clock signals are abnormal and the external clock signals of the equipment are not abnormal, determining whether the number of the external clock signals of the equipment is multiple or not; when the number of the external clock signals of the equipment is determined to be multiple, acquiring the signal type of the external clock signal of each equipment, and determining the external clock signal of the equipment with the highest priority in the external clock signals of the equipment according to the signal types of the external clock signals of the equipment and the preset mapping relation between the types of the external clock signals of the equipment and the priority; carrying out input signal processing on the equipment external clock signal with the highest priority, determining a time service signal according to the equipment external clock signal with the highest priority after input signal processing, and carrying out output signal processing on the determined time service signal and then outputting the time service signal; and taking the device external clock signal with the highest priority processed by the input signal as a clock synchronization source of the local clock signal so as to enable the local clock signal to track and lock the device external clock signal with the highest priority processed by the input signal;
s400, if the abnormal condition of the external clock signal is that both the Beidou external clock signal and the equipment external clock signal are abnormal, switching to a local clock signal of the equipment external clock signal with the highest priority processed according to the tracking locking input signal, determining to output a time service signal, and outputting the determined time service signal after output signal processing;
s500, the military vehicle-mounted time system equipment control method further comprises the following steps: when the Beidou external clock signal is obtained again, the actual stable value of the time service signal output in the preset period is obtained; determining a calculation stable value of a time service signal output according to the newly acquired Beidou external clock signal in a preset period according to the newly acquired Beidou external clock signal; determining whether the calculated stable value matches the actual stable value; when the calculated stable value is determined to be matched with the actual stable value and a clock source switching signal is received, switching to input signal processing for newly acquiring a Beidou external clock signal, determining a time service signal according to the newly acquired Beidou external clock signal after the input signal processing, and outputting the determined time service signal after output signal processing; and the Beidou external clock signal acquired again after the input signal is processed is used as a clock synchronization source of the local clock signal and the external clock signal of each device, so that the local clock signal and the external clock signal of each device are tracked, locked and processed to acquire the Beidou external clock signal again.
2. The military vehicle time system equipment control method of claim 1, wherein the input signal processing comprises input transmission delay compensation processing and digital filtering processing.
3. The military vehicle-mounted time system equipment control method of claim 1, wherein the determined time signal is output after being subjected to output signal processing, and specifically comprises the following steps:
and acquiring a stable value of the time service signal output in a preset period, and outputting the determined time service signal after synchronous processing according to the stable value so as to output the output time service signal after synchronizing the output time service signal with the stable value.
4. The military vehicle-mounted time system equipment control method of any one of claims 1-3, wherein when any one of the Beidou external clock signal and the equipment external clock signal is determined to be abnormal, it is determined that the external clock signal is not abnormal.
5. The military vehicle time system equipment control method of claim 1, wherein the military vehicle time system equipment control method comprises:
and adjusting the priority of the external clock signal of each device according to the received priority adjusting signal.
6. The utility model provides a time system handles board, is applied to military vehicle-mounted time system equipment which characterized in that includes:
a memory; and the number of the first and second groups,
a processor, a military on-board time system device control program stored on the memory and executed by the processor, the military on-board time system device control program, when executed by the processor, implementing the military on-board time system device control method of any of claims 1-5.
7. A military vehicle time system apparatus, the military vehicle time system apparatus comprising the time system processing board of claim 6.
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Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030016171A1 (en) * | 2001-07-12 | 2003-01-23 | Mitsui & Co., Ltd. & Kabushiki Kaisha Topcon | Method and apparatus for determining position |
| CN101145864A (en) * | 2007-10-11 | 2008-03-19 | 华为技术有限公司 | A method and system for improving base clock performance |
| CN102013967A (en) * | 2009-09-08 | 2011-04-13 | 郑州威科姆科技股份有限公司 | 1588 protocol-based beidou time synchronization device and application thereof |
| CN102156404A (en) * | 2010-12-16 | 2011-08-17 | 国网电力科学研究院 | Time synchronizing method capable of recognizing GPS input signals in self-adapting manner |
| US20140003199A1 (en) * | 2012-06-29 | 2014-01-02 | Finite State Research Llc | Method, time consumer system, and computer program product for maintaining accurate time on an ideal clock |
| CN203465541U (en) * | 2013-05-09 | 2014-03-05 | 武汉三江中电科技有限责任公司 | Beidou/GPS double-time service source-based failure time recording device |
| JP2015052560A (en) * | 2013-09-09 | 2015-03-19 | 三菱電機株式会社 | Slave station device, master station device, control device, communication system and time synchronization method |
| CN206906807U (en) * | 2017-06-02 | 2018-01-19 | 西安航光卫星测控技术有限公司 | Big dipper master clock |
| CN108365906A (en) * | 2018-02-12 | 2018-08-03 | 天津天地伟业信息系统集成有限公司 | The method for realizing the automatic prover time of equipment by GPS, the Big Dipper and NTP |
| JP2018144427A (en) * | 2017-03-08 | 2018-09-20 | 京セラドキュメントソリューションズ株式会社 | Image formation apparatus |
| CN109062025A (en) * | 2018-08-13 | 2018-12-21 | 云南电网有限责任公司大理供电局 | A method of it introducing GPS external clock and corrects electric energy meter internal clocking failure |
| CN109407118A (en) * | 2018-11-30 | 2019-03-01 | 云南电网有限责任公司红河供电局 | Data monitoring terminal and its control method based on big-dipper satellite |
| CN110032058A (en) * | 2019-04-17 | 2019-07-19 | 北京电子工程总体研究所 | A kind of time service equipment, time dissemination system and time service method |
| CN110492963A (en) * | 2019-08-30 | 2019-11-22 | 湘电风能有限公司 | A kind of wind power plant time synchronization system |
| CN113075699A (en) * | 2021-03-23 | 2021-07-06 | 广东工业大学 | 5G gateway multi-mode composite high-precision time service method and system |
-
2023
- 2023-03-17 CN CN202310259054.9A patent/CN115981135B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030016171A1 (en) * | 2001-07-12 | 2003-01-23 | Mitsui & Co., Ltd. & Kabushiki Kaisha Topcon | Method and apparatus for determining position |
| CN101145864A (en) * | 2007-10-11 | 2008-03-19 | 华为技术有限公司 | A method and system for improving base clock performance |
| CN102013967A (en) * | 2009-09-08 | 2011-04-13 | 郑州威科姆科技股份有限公司 | 1588 protocol-based beidou time synchronization device and application thereof |
| CN102156404A (en) * | 2010-12-16 | 2011-08-17 | 国网电力科学研究院 | Time synchronizing method capable of recognizing GPS input signals in self-adapting manner |
| US20140003199A1 (en) * | 2012-06-29 | 2014-01-02 | Finite State Research Llc | Method, time consumer system, and computer program product for maintaining accurate time on an ideal clock |
| CN203465541U (en) * | 2013-05-09 | 2014-03-05 | 武汉三江中电科技有限责任公司 | Beidou/GPS double-time service source-based failure time recording device |
| JP2015052560A (en) * | 2013-09-09 | 2015-03-19 | 三菱電機株式会社 | Slave station device, master station device, control device, communication system and time synchronization method |
| JP2018144427A (en) * | 2017-03-08 | 2018-09-20 | 京セラドキュメントソリューションズ株式会社 | Image formation apparatus |
| CN206906807U (en) * | 2017-06-02 | 2018-01-19 | 西安航光卫星测控技术有限公司 | Big dipper master clock |
| CN108365906A (en) * | 2018-02-12 | 2018-08-03 | 天津天地伟业信息系统集成有限公司 | The method for realizing the automatic prover time of equipment by GPS, the Big Dipper and NTP |
| CN109062025A (en) * | 2018-08-13 | 2018-12-21 | 云南电网有限责任公司大理供电局 | A method of it introducing GPS external clock and corrects electric energy meter internal clocking failure |
| CN109407118A (en) * | 2018-11-30 | 2019-03-01 | 云南电网有限责任公司红河供电局 | Data monitoring terminal and its control method based on big-dipper satellite |
| CN110032058A (en) * | 2019-04-17 | 2019-07-19 | 北京电子工程总体研究所 | A kind of time service equipment, time dissemination system and time service method |
| CN110492963A (en) * | 2019-08-30 | 2019-11-22 | 湘电风能有限公司 | A kind of wind power plant time synchronization system |
| CN113075699A (en) * | 2021-03-23 | 2021-07-06 | 广东工业大学 | 5G gateway multi-mode composite high-precision time service method and system |
Non-Patent Citations (1)
| Title |
|---|
| 贺祥飞;卢勇;付禹;: "变电站对时系统(GPS)测试技术探讨", 云南电力技术, no. 05, pages 31 - 32 * |
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