The Distribution Of Heat Parameter Measurement And Study On The Control Technique Of Constant Temperature Difference In Thermal Flow Meter

In the process of industrial production, flow is often need to measure and control theamount of fluid, because of itself and the complexity of measurement environment, there aresome difficulties flow measurement, along with the rapid development of science andtechnology,puts forward newer,higher requirements for flow measurement,nowadays there aremany flow measuring method, the topic for the thermal mass flow measurementproblems,according to the measurement principle of thermal distributed mass flow meter,designed a distributed hardware in thermal mass flow constant temperature differencecontrol to achieve a state of heat distribution measurement test system.Thermal mass flow meter is mass flow meter in recent years rapid development,immersion type mass flow meter comprises a heat distributed mass flow meter and heatdissipation,in order not to disturb the flow field of flow measurement in the interior of thetube, this paper select thermal distributed mass flow meter for flow measurement,in thispaper the thermal distributed mass flow meter two kinds of temperature control to do simpleintroduction, and designs a kind of measurement ofcan realize constant temperature difference control tube model. And the design of controlcircuit of corresponding hardware, build the whole test cycle system.In the study of the experimental scheme and the verification process, from theproduction of heat distributed mass flow sensor, the sensor and the selection of the heatingwire temperature, all aspects of system hardware circuit design and drive the selection of chipsin detail narrates, finally to realize the constant temperature difference control throughdebugging the circuit of the system, and analyze the data oflog mining finally, get the corresponding relationship between the internal function of measuring fluid velocity in pipe line and the pipe wall temperature, further research onthe relationship between fluid mass flow and heat distribution, thus the computationalfluid fluid mass flow certain and under this flow heat away in a certain period of time, namelythe relationship between the power of the heating wire to provide.Through the research, experiment and reliable theoretical basis, and has a certainrepeat ability of experimental results verify feasibility, testing method and system of thewhole experimental system.