Research On Technology Of 1-Wire Bus Temperature Measurement Based On Quartz Tuning Fork Sensitive Element

In view of the problem of the grain warehouse multi point temperature de-tection technology has complex wiring and the temperature sensor has low preci-sion and poor stability, and response speed is slow. In this paper, we put forward a 1-Wire bus temperature measuring system based on quartz tuning fork sensitive components which used the quartz tuning fork resonator as a temperature sensi-tive element. The quartz tuning fork temperature sensor transforms the changes of environmental temperature into the changes of frequency, and transmits fre-quency signal to slave processor, slave processor converts the frequency signals into temperature signals, and transmits the temperature signals to the main con-troller through the 1-Wire bus protocol, thus realizes the detection of the temper-ature measurement.In this paper, we designed a 1-Wire bus temperature measuring system based on quartz tuning fork sensitive components, whose hardware mainly by the master node and the slave node. The master node uses STM32F103VET6 proces-sor to control the communication between the master node and slave nodes, and to process datas; the slave node consists of quartz tuning fork temperature sensor, oscillation circuit, frequency dividing circuit, slave processor and parasite power circuit. Parasite power circuit is used to supply power for the slave node, solved the power supply problem of node. The slave node uses STC15F104E processor to convert the frequency signals transmitted from the quartz tuning fork tempera-ture sensor into temperature signals, and to transmit the temperature signals to the master node through 1-Wire bus protocol. Multiple slave nodes can connect to the master node through a data line, master node can select any slave node to communicate with.The monitoring system of this design is running on the Windows operating system based on the Basic Visual 6.0 development platform and combined with Office Access Microsoft database to prepare a monitoring software, which has the functions of monitoring real-time temperature, providing reliable warning, and has a favorable human-computer interaction interface. Experimental results show that the system has fast response speed, high temperature sensitivity, relia-ble alarm, effective communication distance of up to 100 meters, which meets the requirements of this design, achieves the purpose of 1-Wire bus multipoint temperature measurement.