Research On The Detection Method Of The Slow-release Performance Of The Floor Heating Floor

With the improvement of living standard,people's demand for indoor heating comfort in winter is increasing,which promotes the rapid development of the Wood industry.China is the big country that produces,consume and export lignous product,and the annual output of lignous floor and export amount all take the first place in the world.In view of such a large application market and output,countries have issued a standard document on the specification of floor material,size,formaldehyde content,expansion rate,etc.,but how to evaluate wood floor heating comfort and energy-saving,so far there is not a complete system at home and abroad.Therefore,the performance of the floor heating detection is an imminent problem in the floor industry.In this paper,the slow-release performance of wooden floor heating floor is studied.First,an insulated vacuum chamber is constructed,and a heating block with adjustable temperature was installed at the bottom of the chamber.The temperature of the heating block is kept constant(T0 ?)by the temperature controller.Place the floor panel to be tested with the initial temperature of Te ? above the heating block(Te ? <T0 ?)and keep them close to each other.Install the temperature sensor array on the top of the cavity.The temperature sensor array can read the temperature inside the cavity,because the bottom of the floorboard absorbs heat and the top releases heat.According to the collected temperature,the heat release rule of the floorboard can be analyzed.In this way,the slow-release performance of the wooden heating floor can be achieved.The development of the wooden floor heating floor slow-release performance tester is also one of the contents of this study.The construction of the insulation vacuum chamber,the specimen heating system and the sensor array system can realize the detection of the floor slow-release performance.Select a specific area in the adiabatic vacuum chamber,then divide it into a cube in this area,and finally place a temperature sensor in the center.In this way,a temperature sensor array will be formed in the specific area to achieve temperature measurement at any time in the insulated vacuum chamber.This paper completes the design,development and debugging of the vacuum chamber,heating control system and motion logic control system,and independently develops thecircuit design of the main controller sensor array and sensor array controller,the production and procedures of the PCB board.Using photoelectric isolation technology,the input and output can be isolated to achieve the purpose of undisturbed controller.By constructing the PID operation module,the structural variables are established,so that the variables are concentrated and easy to find.The establishment of the PID operation function can realize all PID calculations in one function body,making the program clear,and the scalability,portability and easy maintenance will be significantly improved.Finally,this paper proposes a parallel temperature acquisition method.The use of this method allows multiple temperature sensors to use a bus,thereby reducing the temperature acquisition time and ensuring the real-time nature of the system.There are 75 sensors installed inside the cavity.Due to the small number of temperature sensors,the temperature field in the vacuum cavity cannot be obtained completely.However,the BP neural network can predict the temperature change of the cavity of the white oak at different times and different heights,so that a continuous and complete temperature field can be obtained,which provides data for the subsequent analysis of the slow release performance of the wooden floor heating floor.Verified by experiment,The slow-release performance detection method and the developed detection device of the wooden floor heating floor proposed in this paper can successfully predict the temperature field of the test piece in the detection cavity and accurately evaluate the slow-release performance of this type of wooden floor.The proposed method and the development of testing instruments will provide theoretical basis and data support for the formulation of industry standards.