Research Of Continuous Measurement Of Temperature And Relative Humidity Inside The Circular Cocoon Drying Machine

As the first process of silk production, cocoon drying will directly affect not only cocoon cooking but also the quality of raw silk. In recent years, the advanced circular air-heated cocoon drying machine is successively applied to cocoon drying production. Therefore, the continuous measurement of temperature and relative humidity inside the circular air-heated cocoon drying machine will be helpful to cocoon drying production.Taking advantage of sensor, communication, auto-measure technology and PC technology, the research designs a device which is able to measure the temperature and relative humidity inside the cocoon drying machine continuously. This device adopts the host-guest architecture, which consists of master computer and slave computer. The slave computer takes charge of the collection and storage of temperature and relative humidity based on PIC SCM and advanced digital sensors; The master computer composed of general PC provides a good interface for users and has a general management of data, including display, storage, query, statute and print, which utilizes RS232C to communicate with hypogyny-system based on LabVIEW.The device principle, structure design and software, hardware design are introduced in this dissertation, meanwhile, the device is calibrated and tested by simulation experiments in the lab, which guarantees the long hours'work in the circumstance of high temperature. In the end, The temperature and relative humidity inside the circular air-heated cocoon drying machine of"Chuanxi"Brand are measured, and we can find the disadvantages of the circular air-heated cocoon drying machine of"Chuanxi"Brand in the control of temperature and relative humidity and the improper aspects of actual production by means of analyzing the temperature and relative humidity of primary drying and secondary drying from the deficits of cocoon drying machine and cocoon drying process respectively. It is expected to provide a frame of reference for perfecting the cocoon drying machine and improving cocoon drying process.