(完整)宠物定时喂食器设计中英文翻译
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The digital temperature nsor of DS18B20
The digital temperature nsor of DS18B20, This product us the American DALLAS company’s DS18B20 network digital temperature nsor 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—Wire TM interface requires only one port pin for communication. Multidrop capability simplifies distributed temperature nsing 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.）。Ur—definable，nonvolatile temperature alarm ttings， Alarm arch command identifies and address devices who temperature is outside of programmed limits (temperature alarm condition）。Applications include thermostatic controls, industrial systems, consumer products，thermometers, or any thermally nsitive system。
1、the description of technique function：
1)Single—line interface is unique，DS18B20 while linking with双一流高校名单
microprocessor only need a line can immediately carry out the double of microprocessor and DS18B20 toward the communication.
方案公司2)measure scope—55 ℃ ～+125 ℃ , proper measure resolution's 0.5 ℃ .
3)support veral t nets function, veral 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
4)work the power:3～5V|DC
5)don't need any outer circle component in the u
6)measure the result measure a way string with 9～12 numbers line
transmission
白叩7)stainless steels protect to take care of diameter Φ 6
8)be applicable to DN15～25, DN40~ DN250 various equipments that lie
industrial piping of quality and narrow and small space measure
9)standards install the thread M10 X1，M12 X1。5, the G 1|2 term
choos
10)PVC electric cable direct the line or virtuous type ball type connect
line box line， the easy to and other electric appliances equipments links。
2、Application
1)products are applicable to cold storage， food Cang， keep a bottle,
tele-communications engine room，electric power engine room, cable slot etc. measures moderate control realm
2)stalk tiles，urn body, the Fang machine, the air condition，waits
industrial equipments of narrow and small space to measure a moderate control.
轻色
3)car air condition，refrigerator，cold cabinet，and medium low
temperature dry box of etc。s.
4)provide hot｜make cold piping calories to calculate， the central air
condition divides a thermal energy to calculate to measure a moderate control with industrial realm
3、Product model number and specification
4、Connect line instruction
The characteristics special front line connects，needs a line to correspond by letter to order more ability and simplified a distribute type the temperature spread the feeling application didn't need an external component to u data total line power supply，the electric voltage scope has never needed to provide for u the power diagraph temperature scope for the 3.0—5.5 Vs BE—55 ℃ to+125 ℃ 。The Fahrenheit is equal hence-67-257 Fahrenheit degree—10 ℃ go to+85 ℃ accuracy inside the scope is ±0.5 ℃责任单位
The temperature spreads a feeling machine’s programmable resolution to convert into 12 number formats for 9～12 temperatures biggest be worth
to 750 a milli— of cond the customer can define of not and easily lo x temperature to report to the police to establish an application to include a constant temperature control，industrial system, consume electronics product thermometer， or any hot nsitive system The number thermometer that describes the DS18B20 provides 9-12(the programmable equipments temperature read a number。The information is disheveled hair to nd to connect through a line from the DS18B20， so central microprocessor and DS18B20 only have a per line conjunction. For read and write and the temperature conversion can acquire energy from the data line, don't need to circumscribe the power. Becau each DS18B20 includes a special ordinal number, veral ds 18 bs 20 s can be existed to a total line at the same time。This makes the temperature spread a feeling machine to place in many different places。 Its u is a lot of， include an air condition environment control, detect equipments inside the building or machine, and carry on process monitor and control。
The DS18B20 internal structure mainly constitutes to from the four—part cent: 64 temperatures that only engrave ROM and temperature to spread a feeling machine and don’t vaporize report to the police to trigger a machine TH and TL and allocation to deposit a machine. While equiping signal line
Gao, the internal capacitor stores an energy from a line and corresponds by letter circuit to the film power supply, and at low electricity even period for film power supply until next Gao Dian Ping's arrival refreshes .The power of the DS18B20 can also。5V electric voltages get from 3 Vs—5s in the exterior.三的倍数的特征
The DS18B20 adopts front line correspondence to connect. Becau the front line correspondence connects, have to previously complete ROM enactment，otherwi memory and control function will can not u. Mainly provide following function to order any first of a:
1)read ROM
2)ROM match
3)arch ROM
4)jump ROM
5)report to the police a check。
The instruction operation the function has no 64 quences that only engrave ROM of a spare par
t， can be hanging veral spare parts on the front line to make lection a certain spare part， at the same time，
the total line can also know always on-line hang how much, what kind of equipments.
高中化学教学设计
If the instruction successfully makes the DS18B20 completion temperature measure， the data saves in the saving machine of DS18B20.The performance of a control function conductor designation DS18B20 measures。Measure result will be placed in the DS18B20 memories，and can let reading to nd out the conductor of remembering the function， reading contents of slice ascend saving machine。 The temperature reports to the police to trigger machine TH and TLs to all have one word stanza EEPROM data. If DS18B20 not the u report to the police to check instruction，the deposit a machine to be a general customer to remember u。 Still carry to there is allocation word's the stanza converting by ideal solution temperature number on the slice。 Write TH, TL instruction and allocation word stanza makes u of instruction completion that remembers function。 Pass to slowly save a machine to read to deposit a machine。All datas read writing all a beginning from the lowest。
The DS18B20 has 4 main data parts：
1、only engrave 64 quences in ROM are what factory front be only engraved likes， it can e make the address quence that is the DS18B20 code.64 alignments that only engrave ROM are: Starting 8（28 Hs） is the product type mark number, immediately after of 48 quences that is the DS18 B20 onelf， last 8 is 56 front circulating redundancy schools to check code。(CRC=X 8+ Xs 5+ Xs 4+s 1)The function that only engraves ROM is to make each DS18B20 all each not same, so can carry out a purpo that is always on-line to hang to connect veral DS18 B20s。
2、the temperature in the DS18B20 spread a feeling machine to complete the diagraph to the temperature and take 12 conversions as an example: The binary system expanding with 16 signs repairs code to read to count a form to provide, with 0。0625 ℃ ｜the LSB form express， among them，the S is a sign。
The saving machine of DS18B20 includes high speed to temporary save machine RAM and can give or get an electric shock to wipe in addition to RAM, can give or get an electric shock to wipe in addition to RAM includes temperature to trigger machine TH and TL again，and an allocation deposits a machine. Saving machine ability the integrity really ttle the communication of front-line port, the number starts
