Unlock instant, AI-driven research and patent intelligence for your innovation.

A self-defined incremental signal generator and calibrator

A technology of signal generator and incremental signal, which is applied to parts, instruments, and measuring electronics of electrical measuring instruments, and can solve the problem of lack of testing means for signal rate protection logic, invariable triangular wave signal increment, and unreliability, etc. question

Active Publication Date: 2017-08-25
STATE GRID CORP OF CHINA +2
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the set value is set too low, it may cause the actual signal to rise rapidly, but the signal protection logic misjudges it as a signal disconnection. For example, the purpose of the temperature rate protection logic is to prevent the temperature signal from being disconnected suddenly. However, if the temperature rate protection action value is too low, the temperature rate protection logic will misjudge the actual rapid temperature rise as a temperature signal disconnection, which will cause the device temperature protection to refuse to operate, resulting in serious consequences
Therefore, it is necessary to test the signal rate protection logic. However, the reliability of this signal rate protection logic has not been verified due to the lack of testing methods, and there are uncertain hidden dangers for the system.
[0003] In order to test this signal rate protection logic, it is first necessary to provide a key analog signal that can simulate this incremental change, that is, a signal generator that can generate a custom incremental (that is, a custom change rate) signal is required, and Existing signal generators do not have the function of outputting custom incremental signals; although existing function generators can output triangular wave signals with increments, the increments of triangular wave signals are immutable and cannot output multi-segment different Incremental signal, that is, the increment is also not customizable

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A self-defined incremental signal generator and calibrator
  • A self-defined incremental signal generator and calibrator
  • A self-defined incremental signal generator and calibrator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Please refer to figure 1 , figure 1 A schematic structural diagram of a self-defined incremental signal generator provided by the present invention, the signal generator includes:

[0030] The data input module 10 is used to input the starting point, the first turning point, the second turning point until the Nth turning point, the end point and the running time between each adjacent two points of the custom incremental signal to the microcontroller 20, Wherein, N is a positive integer not less than 1;

[0031] It can be understood that, at first, the starting point, the first turning point, the second turning point until the Nth turning point, the end point and the running time between each adjacent two points of the self-defined incremental signal are input into the data input module 10. Microcontroller 20, the starting point, breakpoint, end point and the running time between each adjacent two points here are all specific values ​​defined by people according to the...

Embodiment 2

[0042] Please refer to figure 2 , figure 2 The structure diagram of another kind of self-defined incremental signal generator provided by the present invention, this signal generator is in figure 1 Based on the structure of the signal generator shown, it also includes:

[0043] The signal conditioning circuit 50 is used to amplify the analog output 40 from the D / A digital-to-analog converter 30 to the signal output port.

[0044] It can be understood that the function of the signal conditioning circuit 50 is to amplify the analog output from the D / A digital-to-analog converter 30 to meet preset requirements, and output the analog signal.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a self-defined incremental signal generator, which includes a data input module for inputting the starting point, the first inflection point, the second inflection point until the Nth inflection point, The end point and the running time between each adjacent two points; the microcontroller is used to calculate the increment per unit time between each adjacent two points through the starting point or turning point and the running time between each adjacent two points. Then calculate the output value per unit time according to the increment, starting point or turning point per unit time, and output the output value per unit time; D / A digital-to-analog converter is used to receive the output value per unit time, and convert it to Converted from digital to analog. The invention also discloses a calibrator comprising the self-defined incremental signal generator. The self-defined incremental signal generator provided by the present invention can provide multiple segments of signals with different increments during the output process of the same signal source, which satisfies the performance test and verification of the signal rate protection logic.

Description

technical field [0001] The present invention relates to the field of signal generation, in particular to a self-defined incremental signal generator, and also relates to a calibrator including the above-mentioned self-defined incremental signal generator. Background technique [0002] In the industrial production process, in order to prevent the occurrence of system misoperation due to the failure of the detection signal loop, it is often necessary to detect specific key analog signals. For example, in the DCS (Distributed Control System, that is, the distributed control system) system, the moment the thermal resistance and thermocouple signals are disconnected, it may cause a false increase in the displayed temperature, and sometimes even exceed the alarm value of the equipment, thereby causing equipment failure. Misoperation. In order to solve this kind of problem, the DCS system has set up the signal rate protection logic to detect the key analog signal. When the change ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01R1/28
Inventor 卢化黄勃何银锋周佑
Owner STATE GRID CORP OF CHINA