A multi-channel data storage method for oscilloscope recorder

Abstract

The invention discloses a multi-channel data storage method of an oscilloscope recorder. The data selection module selects the input signal after analog-to-digital conversion, and then converts the data bit width of different channel numbers into a suitable one through the data bit width conversion module. The output bit width is input to the large-capacity dynamic memory after passing through the front-end data buffer module. Under the instruction of the memory controller, the data is read out of the large-capacity dynamic memory and input to the stored data recovery FIFO array. The stored data recovery FIFO array will be large The output bit width of the capacity dynamic memory is converted into the data bit width corresponding to the multi-channel data stored in the large-capacity dynamic memory. After the stored data is restored to the FIFO array, the data is sent to the sampling module for sampling to reduce the sampling rate of the data. Then send it to the back-end data cache module for caching, and finally pass it to the host computer.

Description

Technical field [0001] The invention belongs to the technical field of data storage for oscilloscope recorders, and more specifically, relates to a multi-channel data storage method for oscilloscope recorders. Background technique [0002] As a powerful portable data acquisition recorder, the oscilloscope recorder can capture and analyze the transient time and display the trend waveform for up to 200 days by plugging and unplugging the module. The measurement of electrical signals and physical signals can be flexibly combined, and is widely used in various industries. Therefore, oscilloscope recorders are required to have multiple functions to meet the needs of various test occasions. In the current oscilloscope recorders on the market, real-time power calculation, real-time recording, dual capture, and deep storage are essential functions of an oscilloscope recorder. To realize these functions, the collected data needs to be stored; At the same time, in the face of different me...

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Problems solved by technology

[0003] (1), waste of hardware storage resources, for example, a 4-channel acquisition system uses a memory with a storage length of L, and the storage length of each channel is When the user chooses to observe single-channel data, there are Storage resources Storage users don't care about data, resulting in waste of storage resources

[0004] (2) After the design of most multi-channel acquisition systems is completed, the number of acquisition channels cannot be changed, so that when users want to observe additional acquisition data, they can only use multiple acquisition systems for comparison, but this is inconvenient

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