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Multi-channel circulation control method of data acquisition system

A technology of data acquisition system and cycle control, which is applied in the direction of program control, computer control, general control system, etc., can solve problems such as inability to realize multi-channel cycle, inability to send data out, single data output interface, etc., to overcome the complexity of design structure , Guaranteed minimum, flexible effect

Active Publication Date: 2013-02-13
MIANYANG WEIBO ELECTRONICS
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Problems solved by technology

Its shortcoming is that the number of A / D conversion devices is too large. Although the collected data can reflect the current information of each channel, due to the single data output interface, multi-channel circulation cannot be realized, and the amount of data collected is too large to be timely. The data is sent out, causing data congestion

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  • Multi-channel circulation control method of data acquisition system

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Embodiment Construction

[0009] In order to better understand the technical solutions of the present invention, the implementation manners of the present invention will be further described below in conjunction with the accompanying drawings.

[0010] The steps of the present invention are as follows:

[0011] The first step: determine the A / D sampling period of the entire data acquisition system, and take out the time signal of this sampling period as the clock signal of the encoding process;

[0012] Step 2: Establish the maximum number of channels in the entire system, and establish the registers of the start channel and the end channel. The number of bits in the registers of the start channel and the end channel should be the same, and the decoding of the maximum value of the registers of the start channel and the end channel can obtain the maximum channel of the system. Number, these two registers are used to receive the cycle start channel and cycle end channel given by the system;

[0013] The...

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Abstract

The invention provides a multi-channel circulation control method of a data acquisition system, which mainly comprises the following two steps: firstly, encoding / decoding channels, and establishing a mechanism to determine the coded number of the channels at a certain time in accordance with channel switching requirements and the current A / D (analog to digital) sampling clock, wherein the encoding process refers to encoding the starting channel and the terminating channel; and then, decoding the channels, controlling analog switches based on the decoded channel codes, and outputting the corresponding channel codes to corresponding analog switch control ports to control the corresponding channels, wherein the parameters mainly comprise specific addresses of the channel codes, an acquisition mode for a certain channel and the polarities of input signals. The multi-channel circulation control method provided by the invention has the characteristics of high reliability, high flexibility, small phase difference among the channels, wide application and the like, and is accurate in channel time positioning.

Description

technical field [0001] The invention belongs to the technical field of data collection. Specifically relates to a data acquisition system multi-channel cycle control method. Background technique [0002] Most of the multi-channel data acquisition systems currently used are multiple A / D conversion devices, or multi-channel can only perform single-channel acquisition, and the phase difference of input signal acquisition of multiple channels is relatively large, and some can perform cyclic acquisition, but the data channel timing The positioning is imprecise, and the number of loop channels cannot be chosen arbitrarily. A multi-channel loop control method for a data acquisition system uses a loop register, uses the set start channel and end channel values ​​to perform corresponding encoding, and then decodes them separately according to the corresponding requirements. This method is simple to implement and easy to implement in specific Realized in the project, at the same tim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/048
Inventor 严发宝周勇陈刚王能官琴张蓉王璐袁强陈伟肖昕
Owner MIANYANG WEIBO ELECTRONICS
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