1 bluetooth protocol stack realization form of bluetooth protocol specification follows the open system interconnection OSI model. The bluetooth protocol stack in the manner of packaging has three different implementation models & ndash; — Type, embedded and embedded completely stranger, respectively for the products with different functions and resources. Bluetooth protocol stack for embedded model, the bluetooth module, application running on a host computer alone, through the communication adapter protocol and bluetooth module. Embedded model without the host deal with bluetooth upper-layer protocol, reduced the host software load and code length, reduce the development difficulty, for limited memory device is a good choice. This design in bluetooth protocol stack implementation form chose embedded model, through the use of electronic technology co. , LTD. , in the spring of nanjing countries KC02 bluetooth module, guarantee the communication reliability and reduce the amount of code the CPU. 2 bluetooth node linking process in industrial field of valve electric actuator is usually an array, the proper and complete bluetooth node query link is to build a handheld key to operator and valve electric device communications. The process by the hand-held operator MCU through adaptation protocol operations master bluetooth module to complete. Because in the industrial field may have more than one valve with bluetooth wireless communication functions at the same time, carrying manipulator and valve electric device links are divided into physical and logical links. The logical link is a subset of the physical links, only in carrying manipulator with physical link is established between the valve electric actuator, and handheld operator instruction after receiving the confirmation link to establish logical link. This handheld operator into the operation of valve electric device and synchronous display state. electric actuator can only passively accept handheld operator search and link, the upper application in the treatment of link state giving prompt for the operator to judge the state of bluetooth network link. 3 bluetooth application system design in the industrial field use bluetooth wireless communication, the system hardware design is divided into the valve electric actuator and armed with two parts of the operator. 2. 1 valve electric actuator valve electric actuator to realize the control function of the valve body. LPC2292 as the core to build the whole embedded system, bluetooth module adopts industrial-grade KC02 module. LPC2292 is based on ARM7TDMI - NXP company S a high performance industrial microprocessor. Its processor core is a 32-bit RISC architecture, 16-bit instruction set with high density and low power consumption. KC02 bluetooth module is to exchange data and voice communication of bluetooth communication module. Its small size, long shape dimension of 17. 8 mm, width is 15. 2毫米; The working voltage of 3. 3 v, UART, SPI and USB serial interface, UART in this design using the processor with the bluetooth module. 2. 2 hold operator software process operator to the underlying hardware reset after the first initialization, and then according to the received command keys for the corresponding operation. In hardware design, the MCU to connect to the bluetooth module link state port PD4 parallels 7 mouth connected with bluetooth module RESET pin. 2. 3 hold operator operator function to search from the bluetooth, and after a master-slave bluetooth link building, operating Industrial Valves electric actuator, and synchronization of valve electric device screen content. Its system structure for eight AVR microcontroller ATmega128L as the core, including buttons, LCD screen, the bluetooth module and power handling four parts. KC02 master bluetooth module are connected to the microcontroller through the serial port. Carrying manipulator used batteries, through the power conversion chip AMSI1117 after voltage to power the entire embedded system. 4 system data exchange functions: carrying manipulator with the method of query response to collect real-time state of valve electric actuator. Every 100 ms, handheld operator will send out one query command, the valve electric actuator to the current state is packaged as a 1 frame data to carrying manipulator of 6 characters. Because of the data transmission will contain 0 XFF and 0 xfe, it can be as a marker of the beginning and end of 1 frame data. Handheld operator through the same data format to get rid of the starting marks and end marks parsing out a frame data, and synchronous display state of valve electric device. In handheld operator and valve electric device parameter synchronization set into the valve, the length of the data frame is not fixed, according to the book before the information needed to display the page for data exchange. Link disconnect tip: when holding due to outside to talk or distance increases between the operator and valve electric device link disconnected, carrying manipulator link disconnect tips, valve electric device is out of the bluetooth wireless operating state, back to the local operating mode. Conclusion for the bluetooth wireless technology is introduced into the valve electric device in the actual engineering demand, this paper analyzes its feasibility, and realize the actual hardware and software system, the industrial field of wireless technology has a certain reference value.
In the present growing world of emerging technology, the has demanding operation in various sectors like cast iron valve, os gate valve, cast iron gate valve and many other industries at resilient seated valve levels of manufacturing and designing.
We believe our ability can raise a giant wave of innovation among the field of wedge gate valve.
Shenzhen Mech Valve Trading Co., Ltd. will give you a suitable price for purchasing rising stem gate valve.
Shenzhen Mech Valve Trading Co., Ltd. offers the best for indoor as well as outdoor use. To find your ideal at attractive offers, visit us at Mech Valve.