Downhole vibration and impact data recording method

A vibration and impact data recording method for a drilling operation, comprising:

• step S1, performing an analog-to-digital conversion at a sampling rate f1 on analog data output from a sensor to obtain a first digital format data and outputting the first digital format data;
• and
• performing a sampling storage processing and an analysis storage processing on the first digital format data,
• and wherein the sampling storage processing comprises:
• step S2, sampling the first digital format data at the sampling rate f2 to obtain a second digital format data and outputting the second digital format data, wherein f1>f2;
• step S3, sampling the second digital format data at the sampling rate f3 to obtain a third digital format data and outputting the third digital format data, wherein f2>f3;
• and repeating a step of the sampling and outputting until a nth digital format is obtained at a sampling rate fn, wherein n is any integer greater than 3;
• step S4, storing the nth digital format data continuously into a storage module, wherein the nth digital format data represents vibration signals;
• step S5, storing the first digital format data, the second digital format data, . . . , the (n−1)th digital format data intermittently;
• and wherein the analysis storage processing comprises:
• step S6, buffering the first digital format data into a memory;
• step S7, analyzing the first digital format data currently buffered in the memory to obtain a current condition of an impact;
• step S8, analyzing the condition of an impact to determine whether an impact event occurs;
• if the impact event occurs, performing step S9;
• if no impact event occurs, the analysis storage processing ends;
• and
• step S9, storing the data currently in the memory into the storage module.