Network timing precision control method, system and terminal equipment of seismic collector
A network timing and precision control technology, applied in time division multiplexing systems, seismology, seismic signal recording, etc., can solve the problems of high implementation cost, unfavorable implementation, and low timing accuracy, and achieve improved timing accuracy and symmetry The effect of reducing and reducing the timing error
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Embodiment 1
[0054] figure 1 It is a schematic flow chart of the network timing accuracy control method of the seismic collector provided by the embodiment of the present invention, and the method may include the following steps:
[0055] S101: For the data packet received by the client, use the interrupt mode to make the data packet receive the data packet by the application layer of the client, and use the interrupt mode to send the data packet from the application layer of the client to the physical layer of the client .
[0056] S102: When the client sends the data packet to the server, preset a network environment constraint value.
[0057] S103: Continuously detect the GAP value and the DELAY value in the time synchronization process of the network environment constraint value at different times, wherein the GAP value is the clock offset between the client and the server, and the DELAY value is the data packet The time delay in the round trip between the client and the server.
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Embodiment 2
[0062] The timing accuracy control method provided by the present application will be described below in conjunction with specific examples; figure 2 Another embodiment of the present invention provides a schematic diagram of a data packet transfer process between the client and the server.
[0063] On the basis of the NTPV0 protocol, the client-server mode of this protocol is adopted, and the communication method is UDP. Unit, in the server section, by default the server has accurate time service at this time, and its time source can come from GPS or other time service units, which will not be discussed here, but for the algorithm restrictions in the server's time service process, part of it needs to have Application layer software limitations are specifically addressed here.
[0064] In addition, other conventional names and common synchronization processes related to the NTP protocol will not be repeated in the present invention.
[0065] For reaching above-mentioned inv...
Embodiment 3
[0077] image 3 It is the network timing accuracy control method of the seismic collector provided by another embodiment of the present invention, which is described in detail as follows:
[0078] For this high-precision network timing algorithm based on real-time data transmission seismic collectors, the client and server are both Cortex-M3 embedded MCUs based on ARM architecture in this example, and the selected model is STM32F2 series of STMicroelectronics. Here, this algorithm does not need to make specific requirements on the MCU model, but only requires that the MCU has a corresponding network physical layer interrupt register, and can configure and respond to this register interrupt. For the operating system used by the client and server, there is no mandatory dependency requirement in this algorithm, but the following two conditions must be met in the operating system: 1. There is a network physical layer interrupt hook function or interface, which can be used in the i...
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