宠物定时喂食器设计中英文翻译.doc

The digital temperature sensor of DS18B20 The digital temperature sensor of DS18B20, This product uses the American DALLAS companys DS18B20 network digital temperature sensor chip package. but become wear-resistant touch, the physical volume is small, convenient, packaging form is varied , Suitable for all kinds of narrow space in digital temperature test and control field equipment. Unique 1-WireTM interface requires only one port pin for communication. Multidrop capability simplifies distributed temperature sensing applications, requires no external components, Can be powered from data line. Power supply range is 3.0V to 5.5V, Zero standby power required, Measures temperatures from -55°C to+125°C. Fahrenheit equivalent is -67°F to+257°F, ?0.5?C accuracy from -10°C to +85°C, Thermometer resolution is programmable from 9 to 12 bits, Converts 12-bit temperature to digital word in750 ms (max.).User-definable, nonvolatile temperature alarm settings, Alarm search command identifies and addresses devices whose temperature is outside of programmed limits (temperature alarm condition).Applications include thermostatic controls, industrial systems, consumer products, thermometers, or any thermally sensitive system. 1、the description of technique function: Single-line interface is unique, DS18B20 while linking with microprocessor only need a line can immediately carry out the double of microprocessor and DS18B20 toward the communication. measure scope-55 ℃ ~ +125 ℃ , proper measure resolutions 0.5 ℃ . support several set nets function, several DS18B20 can merge at unique three on-line, the most can merge 8, if amount was excessive, it would make power supply the power electric voltage over low, result in thus the signal delivers of unsteady, the realizations order to measure more work the power:3~5V|DC dont need any outer circle component in the use measure the result measure a way string with 9~12 numbers line transmission stainless steels protect to take care of diameter