基于單總線(xiàn)及無(wú)線(xiàn)通信技術(shù)的醫(yī)院體溫監(jiān)測(cè)警報(bào)(文件)
【正文】 PC and work central station. One port connects USB interface of monitor controller, the other connects work central station. Because USB protocol is rather plex, we use USB controller chip to avoid trouble. interface tiptop transmission velocity can reach 12Mb/s. So, this system selects standard, whole module is posed of USB controller, SCM, etc.USB controller is the core of USB bus interface circuit. This system selects chip PDIUSBD12 produced by PHILIPS Co. PDIUSBD12 is a capability optimization USB ponent with parallel bus, which satisfying with and DMA munication. Usually, it is used to municate by highspeed currency parallel interface based on microprocessor system. Under batch transmission mode, transmission velocity can reach 1Mb/s through facility connected by 8 digit data parallel adopts address/data bus multiplexer mode to PDIUSBD12 by using port INT0,ALE,WR,RDandP0. PDIUSBD12 latches output address of AT89C52 under descends edge. In this mode, AT89C52 can carry out data operation by using MOVX instruction, and transmitting instruction when output address is odd number, conversely, transmitting data to PDIUSBD12. IV. SYSTEM SOFTWARE DESIGNSystem software design adopts modularization program structure, terminal controller software design uses KEIL C51 language, upper PC control software uses LABVIEW and ACCESS to design. System software is mainly posed of upper PC munication software, field monitor node temperature collection, process, and control algorithm software, etc. Software system adopts modular design, which divides into some relative independent function module, and arranges suitable enter and exit port parameters. On system designing, in order to avoid munication jamming, different patient bed patient terminal controller and monitor temperature sensor work in different frequency segment, each ward subcontroller must carry out address code to monitoring temperature if it wants to know which sensor transmitting temperature. Address code has two kinds of style: protocol addressing and nonprotocol addressing. Nonaddressing uses NRF905 RF configuration register, transmits address register to address, so, substation can decide which monitoring temperature sensor transmits data. Protocol addressing includes substation address and monitoring temperature address of transmitting data. So, subcontroller can judge which sensor transmits transceiver physical address adopts its default address 0xE7E7E7E7。C measurement precision. So, it can plete task accurately. DS18B20 has three pins, VCC, GND, and DATA. Among them, pin VCC is power supply port, GND is earth port, and pin DATA is data route port, which is used to transmit dictate and temperature data. It only has one signal line and earth line from SCM to DS18B20. DS18B20 pletes read, write and power of temperature exchange is offered by data line itself. Temperature transfer time is shorter。 LABVIEWⅠ. INTRODUCTIONAt present, patient physiological parameter adopts timing artificial measurement style at most hospital. For example, nurse goes to ward and measures patients’ body temperature every day, manual records and draws body temperature changing figure, which can be analyzed by doctors as reference of disease diagnosis. This term of conventional not only wastes nurses’ massive manpower, but also aggregation, query analysis to measurement result is miscellaneous, as well as cannot feedback in time when patient appears special condition, which can cause delay of treatment time. Through analysis we can see, this kind of style has bigger limitation, especially, to those patients with infectious diseases, monitoring personnel is inconvenience to contact. So, aiming to this problem, by sensor technology, singl
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