Summary: ROK101007 is that one kind which Ericsson Company produces realizes hitting the communication module of the short distance of bluetooth function. Proceed from the angle of employing, integrate ROKl01007 to the automatic warning system of the wireless fire as the communication module, have carried on discussion and research to the application in the fire called the police of bluetooth technology, and provide fire automatic principle block diagram and ROKl01007, one-chip computer and interface circuit to get on location machine of warning system, and corresponding main software design method.
Keyword: The fire calls the police; Bluetooth technology; ROKl01007; Wireless communication
A foreword
With sensing the constant development of technology, microelectric technique, artificial intelligence and network technique, the automatic warning system of the fire is controlling the technical development towards a new generation. But the current detectors of warning system of fire and connections of the controllers mostly adopt two or insulating wire or copper core cable of many pieces of copper core, make systematic consumptive material more, consumption old, design and operation and maintain complicated; And the connecting wire is apt to wear out or is corroded, abraded, there is much trouble incidence, the false-positive rate is high; When the system runs, fire information is come and gone to convey among detector and controller, punish the burden, patrol and inspect the speed, stability and dependability after lowering the system in signal which has increased the warning controller. So use in autoalarm of fire field, can realize the intersection of fire and information to be wireless to transmit the intersection of bluetooth and technology, it is the ideal scheme of solving the above-mentioned problem, it is a development trend of the automatic warning system of the modern fire at the same time. This text introduces the bluetooth chip ROKl01007 and integrates to the automatic warning system of the fire as the communication module, adopting the wired and wireless network scheme that combines together forms the distributed warning system, realize automatic detection and control of the on-the-spot parameter.
Basic characteristic of 2 ROKl01007
ROKl01007 is that one kind which Ericsson Company produces realizes the short distance communication module of the bluetooth function in various electronic apparatuses, it support UART, PCM, the intersection of USBl.1 and interface, support some to connect a bit more, have sound and function of data transmission. Module of this bluetooth accords with the edition of bluetooth 1.1, and authorize through FCC/ETST type, its internal structural block diagram and pin disposition, its inside mainly includes the module of radio frequency PBA31301/2 , module of function such as baseband controller, flashing memory. Table 1 has listed the main pin of ROKl0l007 bluetooth module to prove.
3 application in the autoalarm of fire
3.1 Automatic warning system forms the fire
Adopt second that PC and one-chip computer make up and observe and control the systematic structure, the one-chip computer is used in the front to measure the unit as the next machine, responsible for collection and preconditioning of the on-the-spot fire signal,etc.. PC as at location machine,last terminal station, it is set up and control about parameters of network system whole not to responsible for, finish intelligent treatment of concentration of the data,etc.. The automatic block diagram of warning system of the fire, the next machine system adopts the wired, wireless connection way that combines together and carries on the information transmission, block diagram of the hardware. Adopt UART of the module of bluetooth to carry on data communication as the interface, the module of bluetooth is regarded as the digital circuit terminal device DCE at this moment, Data Circuit-terminal Equipment ,Its serial transfer rate can reach 460 kbit/s.
Get on the systematic hardware disposition block diagram of the location machine.
The module ROKl01007 of bluetooth supports to keep HOld , intercept sniff , dormancy Park Three kinds of energy-conserving modes, among them keep the mode being suitable for connecting low consumption apparatuses such as several slight network and temperature sensor, smog detector,etc.. There is no data transmission in the detecting devices of fire in most time, therefore can put the detector as keeping the work pattern in the real automatic warning system of fire through the warning controller, only one internal counter works in the slight network at this moment. Once detector of a certain fire detects the condition of a fire, the unit that is in keeping the mode is activated, after the fire information that the detector monitors is analysed and processed and transformed into the electric signal by the baseband chip, convey to the warning controller through the radio frequency chip. The application software of installation on the controller, is responsible for the comprehensive analysis of the terminal information of bluetooth of every position, concentrate on judging and deal with.
After and operation confirms the fire, transmit the order to and link and control the apparatus, and then linked and controlled the apparatus to start the corresponding linkage device. In the whole transmission course, save the hardware to control, has raised the transmission speed, also provided convenience in order to maintain. While first building through the slight network network that bluetooth technology connects, define the warning controller as the main apparatus, the fire detector is defined as setting up A-CL chain and carrying on data transmission from the apparatus.
4 systematic software design
The technical standard of bluetooth has defined the controller interface HCI of the host computer, HCI standard is mainly to define the host computer controls each order meaning of the module of bluetooth. Dividing into groups each HCl begins with HCI designator, different designators represent different kinds of HCl divides into groups, set out in Table 2. Receive and dispatch the way of dividing into groups and carry on information exchange through HCI between host computer and bluetooth module, use the order – reply Command-Response The way realizes control.
ROKl01007 can offer the high function to the HCI layer, systematic software design is mainly to finish module of bluetooth and host computer PC, one-chip computer Communicate and communicate bluetooth that the module and bluetooth modules. The next machine system mainly carries on programming on the one-chip computer, realizes collection, treatment of the data,etc., the focal point is that HCI-RS232 transmits the news report of layer. Software procedure. Carry on initialisation to the module of bluetooth at first, presume corresponding bunches of communication parameters; According to HCI order of the bluetooth standard, finish the inquiry of the apparatus and connect; The data are gathered to connect the one-chip computer after succeeding in at the beginning, then bale the data into ACL data packets to send to terminally and carry on transparent data transmission. The data while dividing into groups in ACL data must be L2CAP Logical Link Control and Adaption The form, the concrete meaning consults the norm.
The control on module of bluetooth of PC is mainly worked out and transferred HCI order through the software, the whole procedure can adopt the high-level language programming VisualC/C to realize on the PC.
5 conclusions
With the intersection of bluetooth and until indoor gymnasium set up, pay area call the police by one slight network among a small circle wait, the intersection of module and ROKl01007, there are very broad development prospects. At present, have already adopted the wireless network technique of bluetooth in some skyscrapers abroad, have really realized among the apparatuses ” Seamless link, online at any time ” . Put for main apparatus warning controller, detector put until from apparatus, form ” connect in the sky ” through the intersection of ROKl01007 and module with main apparatus ,Realize data communication, three pieces of host computer controller interface that this module offered have helped the hardware designed on the earth very much. In addition, the module of bluetooth has clear networks that encapsulates the agreement, can realize and connect with directness of TCP/IP very conveniently. Apply the module of bluetooth to the automatic warning system of the wireless fire, can reduce the cost of systematic design and construction, reduce the false-positive rate, improve systematic dependability, have advantage with incomparable other technology.