Clock quartz oscillator synchronization method, apparatus and system

A clock quartz oscillator synchronization method, comprising:

• when a calculation unit is in network connection, calculating a first deviation between a calculation unit time and a network clock time;
• updating a fundamental deviation based on the first deviation;
• updating the calculation unit time and calculating an actual refresh frequency of the calculation unit based on the fundamental deviation;
• calculating a second deviation between the calculation unit time and a sensor time;
• and
• updating the sensor time and calculating an actual interruption frequency of a sensor based on the second deviation,
• wherein the calculating a first deviation between a calculation unit time and a network clock time comprises:
• calculating and recording a network delay at intervals of a first preset time;
• and
• calculating the first deviation between the calculation unit time and the network clock time based on the network delay at intervals of a second preset time, and
• wherein the calculating the first deviation between the calculation unit time and the network clock time based on the network delay at intervals of a second preset time comprises:
• sorting all network delays d during the second preset time in ascending order to obtain a delay data set, and counting a total amount of the all network delays d during the second preset time as n;
• establishing a fundamental data set by, starting from an
• n
• 8
• -
• th
• -th network delay d, continuously acquiring
• n
• 2
• values of the network delays in the delay data set;
• based on the fundamental data set, calculating an operation frequency and a drift frequency corresponding to each network delay d in the fundamental data set, and obtain an operation frequency difference set and a drift frequency difference set;
• and
• determining a first deviation fitting line based on the operation frequency difference set and the drift frequency difference set, calculating a first gradient of the first deviation fitting line, and calculating the first deviation based on the first gradient.

A clock quartz oscillator synchronization method, comprising:

• when a calculation unit is in network connection, calculating a first deviation between a calculation unit time and a network clock time;
• updating a fundamental deviation based on the first deviation;
• updating the calculation unit time and calculating an actual refresh frequency of the calculation unit based on the fundamental deviation;
• calculating a second deviation between the calculation unit time and a sensor time;
• and
• updating the sensor time and calculating an actual interruption frequency of a sensor based on the second deviation,
• wherein the calculating a second deviation between the calculation unit time and a sensor time comprises:
• obtaining a data sending time every time the sensor sends data and a data receiving time at which the calculation unit receives the data, and calculating a first difference value between each of the data receiving time and each of the data sending time;
• determining a maximum value of the first difference value within a third preset time at intervals of the third preset time;
• and
• at intervals of a fourth preset time, based on a maximum value of the first difference value in each of the third preset time and a data sending time corresponding to the maximum value of the first difference value, calculating the second deviation between the sensor time and the calculation unit time, wherein the fourth preset time comprises a plurality of the third preset times, and
• wherein the at intervals of a fourth preset time, based on a maximum value of the first difference value in each of the third preset time and a data sending time corresponding to the maximum value of the first difference value, calculating the second deviation between the sensor time and the calculation unit time comprises:
• in the fourth preset time, based on the maximum value of the first difference value in each of the third preset time and the data sending time corresponding to the maximum value of the first difference value, determining a first difference value set and a data sending time set;
• and
• determining a second deviation fitting line based on the first difference value set and the data sending time set, calculating a second gradient of the second deviation fitting line, and calculating the second deviation based on the second gradient.