分布式溫度傳感器外文翻譯-其他專業(yè)-在線瀏覽
2025-03-24 07:44本頁面
【正文】 y, 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. AT89C51 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 shown 第 3 頁 12 AT89C51 pins figure Major features: 4K bytes programmable FLASH memory data retention time: 10 years level 3 program memory lock 32 programmable I/O lines 5 interrupt source low power consumption of idle and power lost mode s sake. RST: reset input. When oscillator reset device to keep RST feet high level two machine cycle time. ALE/PROG: when access external storage, address latch allows the output level of the position for latch address byte. During the FLASH programming, this pin for input programming pulse. In peacetime, the ALE with a constant frequency cycle output is the pulse signal, the frequencies of the 1/6 oscillator frequency. So it can be used a
高考資料相關(guān)推薦
鄂ICP備17016276號-1