Method and system for temperature measurement of fluid in pipe, electronic device and storage medium

A system for temperature measurement of fluid in a pipe, wherein the system comprises:

• a parameter determining module, configured to determine fixed parameters and process parameters of an object to be measured;
• wherein the object to be measured is a pipe with fluid therein;
• the fixed parameters comprise a flow rate of the fluid, a wall thickness of the pipe, a thermal conductivity of a wall material of the pipe, a convective heat transfer coefficient of the fluid and a convective heat transfer coefficient of an outer air;
• and the process parameters comprise a noise variance and an observation variance;
• a temperature acquiring module configured to acquire an outer air temperature and an outer wall temperature of the pipe at a current moment;
• a predicted temperature determining module, configured to determine a predicted temperature at the current moment according to an optimal internal pipe temperature and a flow rate of the fluid at a previous moment;
• a covariance determining module configured to determine a covariance at the current moment according to the noise variance and an optimal covariance at the previous moment, wherein the optimal covariance at the previous moment is determined according to a weight coefficient at the previous moment, a covariance at the previous moment, the fixed parameters and the observation variance;
• and an optimal internal pipe temperature, a weight coefficient and a covariance at an initial moment are obtained by initializing the parameters of the object to be measured;
• a weight coefficient determining module configured to determine the weight coefficient at the current moment according to the fixed parameters, the observation variance and the covariance at the current moment;
• and
• an optimal internal pipe fluid temperature determining module, configured to determine the optimal internal pipe fluid temperature at the current moment according to the predicted temperature at the current moment, the weight coefficient at the current moment, the outer wall temperature of the pipe at the current moment, the air temperature at the current moment, the fixed parameters and the observation variance.