數(shù)顯溫度計(jì)-外文翻譯(改)(編輯修改稿)
2025-07-14 07:23 本頁面
【文章內(nèi)容簡(jiǎn)介】 mperature sensor is headed in high precision, multifunction, bus, standardization, high reliability and safety, development of virtual sensor and network sensor, research monolithic temperature measuring system and other hightech direction develop rapidly. Sensors in the application temperature controlling system. Current market exists mainly single point and more two temperature measurement. For single point temperature foundment instrument, mainly adopts the traditional analog integrated temperature sensor, which heat resistance, thermocouple sensors measuring accuracy, high measurement range, and got the general application. This product is temperature measuring range ℃ ~ 200 mostly between 800 ℃, resolution 12th, and least distinguishable temperature in ~ between. Cabin LED display module, shows ranging from 4 to 16. Some instruments also has memory function, can store several hundred to a few thousand sets of data. This instrument can be very good meet a single user singlepoint measurement needs. More temperature measurement, relative and single point measurement precision has certain gap, although realized the multichannel temperature measurement and control, but the price is expensive. In view of the present market situation, proposed this topic can satisfy requirements, scalable and costeffective singlechip multichannel temperature measuring system. Through the first temperature sensor DS18B20 acquisition, and then through the C51 SCM processing and displayed on the digital tube, can be collected indoor or a greenhouse around in different locations of the temperature, with four digital tube to display. The first digital pipe display acquisition is which way, which channel. Three digital pipe display after the acquisition channel by temperature, accurate to degrees.2. The system realized and related technologies system is realizedBy the whole control system for core AT89C51, using four ways of temperature sensor DS18B20 in production site for distribution area of four different temperature measurement result with the chip checking, collation store and display, and through the button control, temperature will process after the LED digital display to e out, and the software assurance system antiinterference capacity。four DS1820 connected to MCU respectively, this scheme four IO mouth occupy MCU four IO though, but the microcontroller IO mouth under the condition of mouth not shortage by this scheme greatly simplify programming difficulty, shorten the design cycle, also can guarantee the stability of the system. A multipoint connection as shown“11”DS1820DS1820DS1820DS1820AT89C51MCUDisplay elementButton control unit11 multipoint connection .AT89C51 Chip introductionAT89C51 is a 4K bytes FLASH Memory (Erasable Programmable and FPEROM FLASH for the campaigns with) low voltage, highperformance CMOS eight microprocessors, monly known as the microcontroller. AT89C2051 is a 2K bytes with flash memory can be erased programmable readonly memory , SCM can erase readonly memory can be repeated erased 1000 times. This device adopts ATMEL highdensity nonvolatile memory manufacturing technology manufacturing, and industrial standard MCS 51 instruction set and output tube patible. Due to the multifunctional 8 bits CPU and will be flashing on single chip bination of memory, ATMEL AT89C51 is a kind of high efficient micro controller, AT89C2051 is a streamlined version. AT89C 51microcontroller as many embedded control system .Arrange appearance and pin as shown in figure 12 shown12 AT89C51 pins figureMajor features:? and MCS 51 patible? 4K bytes programmable FLASH memory? life: 1000 write/wipe cycle? data retention time: 10 years? the static job: 0Hz 24MHz? level 3 program memory lock? 128 x 8 bits internal RAM? 32 programmable I/O lines? two 16 timer? 5 interrupt source? programmable serial channels? low power consumption of idle and power lost mode? piece inside oscillator and clock circuitTube feet explains:VCC: power supply voltage.GND: grounded.P0 Mouth: P0 mouth a eight leak level twoway
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