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Temperature Drift Compensation Algorithm for Digital Power Transmitter and Instrument

A technology of power transmitter and temperature drift compensation, which is used in the measurement of electrical variables, the phase angle between voltage and current, instruments, etc., to achieve high-precision results

Active Publication Date: 2018-01-16
NANJING XIEAO INTELLIGENT CONTROL SYST CO LTD
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Problems solved by technology

[0004] The purpose of the present invention is: in order to overcome the deficiencies in the prior art, the present invention provides a temperature drift compensation algorithm for digital power transmitters and instruments, which can ensure high precision

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  • Temperature Drift Compensation Algorithm for Digital Power Transmitter and Instrument
  • Temperature Drift Compensation Algorithm for Digital Power Transmitter and Instrument

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] The components of the digital power transmitter and meter of the present invention adopt ordinary industrial grade products, but after the power transmitter or meter is made of SMC, the power transmission adopts full isolation technology, which can directly collect AC voltage and current signals, and can Measure power frequency, voltage, current, and phase difference and single-phase, three-phase balanced power; use a dedicated integrated chip; through the programmer, you can modify the display range and transmission output range online; with LCD display function; with RS485 interface communication Function, using the standard MODBUS RTU protocol to connect with the host computer to form a data acquisition system and a control system. The data acquisition system and control system need to collect high-precision data, so the transmitter or instrument equipment ne...

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Abstract

The invention discloses a temperature drift compensation algorithm for a digital power transmitter and an instrument. During the calibration process of a digital power transmitter or a meter, temperature drift calibration is performed, that is, the digital power transmitter or meter is collected in real time. The CPU temperature of the device and the sampling value of the CPU temperature are used to calculate the relationship coefficient between the temperature drift and the temperature; in the actual operation of the digital power transmitter or instrument equipment, the temperature compensation coefficient is calculated according to the temperature drift coefficient, and the actual sampling value is calculated. When the equipment is at different temperatures, the current temperature is collected in real time, and the compensation coefficient is calculated to ensure accuracy. This method is applicable to all digital power transmitters and instruments that can collect the current temperature of the equipment CPU.

Description

technical field [0001] The invention relates to a temperature drift compensation algorithm, in particular to a temperature drift compensation algorithm of a digital power transmitter and an instrument. Background technique [0002] Existing digital power transmitters and instruments can guarantee high precision (0.2 or 0.5 grade) at an experimental temperature of 20°C to 25°C. In low temperature or high temperature environments, the accuracy of the equipment will be low. The main reason is that the resistance value of electronic components, especially resistors, will change with temperature. When the device converts the external large-power signal into a small-power signal for CPU sampling through electronic components such as resistors, the small signal will change as the temperature rises or falls, resulting in low output accuracy of the device in a high-temperature or low-temperature environment. [0003] Currently in order to solve this problem. The main sampling is th...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R11/185G01R19/00G01R25/00G01R23/02G01R22/10
Inventor 张熀松
Owner NANJING XIEAO INTELLIGENT CONTROL SYST CO LTD
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