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Real-time data collecting and processing system based on multi-MCU (microprogrammed control unit) communication

A real-time data acquisition and processing system technology, applied in the direction of comprehensive factory control, comprehensive factory control, electrical program control, etc. Large, satisfying real-time performance, and the effect of increasing sampling frequency

Inactive Publication Date: 2014-01-22
SHAANXI HI-TECH IND CO LTD
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Problems solved by technology

However, when the field signal frequency is high, the sampling frequency should also be increased, so that the amount of data transmission per unit time will also increase accordingly. cause system crash

Method used

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  • Real-time data collecting and processing system based on multi-MCU (microprogrammed control unit) communication

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Experimental program
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Embodiment Construction

[0010] see figure 1 , is a master-slave data acquisition and processing system composed of 89C51 single-chip microcomputer. The system is used in the measurement process of moisture and specific point temperature in the printing and dyeing system. In practical application, the baud rate is 9600bps, and the data frame is: 1 start bit + 8 data bits + 1 stop bit. During data exchange, the host calls the address of the slave, and the slave sends local data to the host. When the host calls, it sends out 1-byte data (namely the slave address), and when the slave responds, it sends up 3 double-byte data, and the data format is: AA + data, that is, 7 bytes. Assuming that under ideal conditions, the master calls and the slave responds immediately, then the master needs at least (7 + 1) > 10 > 1 / 9600 = 8.333mS to complete the data exchange with a slave

[0011] (Ignore the interval between data frames and the address judgment of the slave, that is, the communication transfer time)....

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Abstract

A real-time data collecting and processing system based on multi-MCU communication comprises a field data collector, a CPU (central processing unit) serving as a core digital system, a main processor adopting an AT89C52 single-chip microcomputer as well as a data processing unit, wherein the data processing unit and the field data collector are in point-to-point communication connection, all data are processed in a double-CPU parallel communication manner in the data processing unit, and a processing result is sent to a monitoring host in a serial manner. According to the real-time data collecting and processing system based on multi-MCU communication, when field signal frequency is higher, sampling frequency is increased correspondingly, thus, data transmission amount in unit time is further increased correspondingly, and multipoint collection is performed to realize timeliness.

Description

technical field [0001] The invention relates to a real-time data collection and processing system, in particular to a real-time data collection and processing system based on multi-MCU communication. Background technique [0002] The single-chip microcomputer has strong computing ability, fast computing speed, perfect I / O interface function, strong anti-interference ability, and high reliability. It is still one of the core components of the field data collector for field data collection and processing. When the on-site test points are relatively scattered, the data collectors are usually connected into a network by serial communication, and the host adopts the master-slave access mode to realize multi-point data collection. This scheme can better complete multi-point data acquisition and processing tasks when the amount of data transmission is small, the signal changes slowly, and the sampling period is long. However, when the field signal frequency is high, the sampling f...

Claims

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Application Information

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IPC IPC(8): G05B19/418
CPCY02P90/02
Inventor 王耀斌
Owner SHAANXI HI-TECH IND CO LTD
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