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Data acquisition method with alternative memory synchronous continuous transmission

A data acquisition and alternating technology, applied in the direction of instruments, computer control, simulators, etc., can solve the problems of increasing hardware costs, easy introduction of noise, etc., and achieve the effect of preventing channel congestion and avoiding bus switching circuits

Inactive Publication Date: 2009-07-08
INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

However, this method is easy to introduce noise at the splicing of two sets of data, and at the same time increases the cost of hardware, and uses the redundancy of hardware in exchange for the continuity of data acquisition.

Method used

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  • Data acquisition method with alternative memory synchronous continuous transmission

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Embodiment Construction

[0032] A data acquisition method for alternate storage synchronous continuous transmission, comprising the following steps:

[0033] (1) Connect host 1 and host 2 to the interactive bus, and connect the analog-to-digital converter and two large-capacity storage units 1 and 2 via the customized analog-to-digital conversion controller and two storage unit controllers on the FPGA interactive bus;

[0034](2) When the system starts to work, host 1 alternately stores the ADC sampling data into two large-capacity storage units in time slices. When host 1 writes data to mass storage unit 1, host 2 reads data from mass storage unit 2 Read data; when host 1 writes data to storage unit 2, host 2 reads data from storage unit 1;

[0035] (3) After the host 2 reads the data, it can send the data to the data server by the communication peripherals of the on-chip system, or by an off-chip coprocessor, such as a microprocessor, a microcontroller, and a chassis bus. The controller, etc., sen...

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Abstract

The invention discloses a method for acquiring alternately stored and synchronously and continuously transmitted data, which can realize long-term continuous acquisition and synchronous transmission of data when the data output rate is higher than the transmission rate. During data acquisition, ADC transformed data is alternately written into two large-capacity memory units (such as a Flash memory card, an electric board and a DDR memory bank), and the data in the memory units are alternately read by an embedded flexible core processor in a system on a programmable chip on an FPGA, and transmitted to a data server directly or through an external coprocessor. The method can adjust the data transmission rate according to the channel bandwidth and the storage speed of the data server, synchronously transmits the data and does not lose the data when the data transmission rate is less than the data output rate or a channel is calked, and solves the problem that the prior three conventional methods can not complete synchronous and continuous data transmission when the data transmission rate is less than the data output rate.

Description

Technical field: [0001] The invention relates to the continuous acquisition and synchronous transmission of medium and high-speed massive data, specifically a method suitable for data acquisition and synchronous continuous transmission under the condition that the data output rate is higher than the transmission rate. Background technique: [0002] The data acquisition method of alternate storage synchronous continuous transmission is mainly used in the field of continuous acquisition and synchronous transmission of medium and high speed mass data. In the case of medium-to-high-speed mass data acquisition, the data output rate of ADC analog-to-digital conversion is usually higher than the data transmission rate. The factors that limit the data transmission rate mainly come from the bandwidth of the channel and the storage device in the data server (or host computer). storage rate. The synchronous transmission of data enables the sampling data to be displayed and analyzed sy...

Claims

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Application Information

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IPC IPC(8): G05B19/048
Inventor 吴一纯李实季振山
Owner INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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