DS18B20 cảm biến nhiệt độ dây nịt

This paper proposes an automatic identification method for multiple digital temperature sensors DS18B20 on a single bus. By designing a circuit composed of a decoder 74LS138, a two-input four-NAND gate 74LS00P, and an analog switch CD4066, the DS18B20 digital temperature sensor software program is written using the Keil C51 tool. Under the control of the microcontroller, the system obtains and saves the serial numbers of all sensors in the form of power-on initialization, automatically identifies the sensors, and performs multi-point temperature measurement. The experimental results show that the system can match the obtained serial numbers with each sensor, so that the sensors can be installed and used, realizing true automatic identification.

DS18B20 cảm biến nhiệt độ dây nịt

DS18B20 sensor is a commonly used digital temperature sensor. Đầu ra là tín hiệu kỹ thuật số, có đặc điểm của kích thước nhỏ, chi phí phần cứng thấp, khả năng chống nhiễu mạnh mẽ, và độ chính xác cao. Cảm biến nhiệt độ kỹ thuật số DS18B20 dễ kết nối, và nó có thể được áp dụng cho nhiều dịp sau khi được đóng gói, chẳng hạn như loại ống, loại vít, Loại nam châm, và loại gói thép không gỉ. Có nhiều mô hình khác nhau, bao gồm cả LTM8877, Ltm8874 và như vậy.

It mainly changes its appearance depending on the application. The packaged DS18B20 can be used for cable trench temperature measurement, blast furnace water circulation temperature measurement, boiler temperature measurement, machine room temperature measurement, agricultural greenhouse temperature measurement, clean room temperature measurement, ammunition depot temperature measurement and other non-limiting temperature occasions. Wear-resistant and bump-resistant, small in size, easy to use, and various packaging forms, suitable for digital temperature measurement and control of various small space equipment.

Ds18b20 temperature sensor and 3.5mm audio connector

1, Technical performance description:
①, a unique single-wire interface,DS18B20 in the connection with the microprocessor only need a port line to achieve the two-way communication with the microprocessor DS18B20.
②, phạm vi nhiệt độ -55 ℃ ~ +125 oC, the inherent temperature error (note, not the resolution,Here before is wrong) 1 oC.
③, support multi-point networking,Multiple DS18B20 can be connected in parallel on a single three-wire,Can only be 8 in parallel,To achieve multi-point temperature measurement,If the number is too large,Will make the power supply voltage is too low,Thus causing the signal transmission instability.
④, cung cấp điện: 3.0 ~ 5.5V / DC (parasitic power supply can be data lines)
⑤, in use does not require any external components
⑥, the measurement results in 9 to 12-bit digital serial transmission mode
⑦, stainless steel tube diameter Φ6
⑧, for DN15 ~ 25, DN40 ~ DN250 various media industrial pipe and small space equipment temperature measurement
⑨, the standard installation thread M10X1, M12X1.5, G1 / 2 “không bắt buộc
⑩, PVC cable direct outlet or German ball junction box outlet,Easy to connect with other electrical equipment.
DS18B20 + and Maxim Integrated information
Manufactured by Maxim Integrated, DS18B20+ is a temperature sensor.
Ứng dụng

The product is applicable to the temperature measurement and control field of freezer, granary, storage tank, telecommunication room, electric machine room, cable trunking and so on.
Bearing, cylinder, textile machinery, air conditioning, and other small space industrial equipment temperature measurement and control.
Car air-conditioning, tủ lạnh, freezers, and low-temperature drying oven, vân vân.
Heating / cooling pipe heat metering,Central air conditioning household heat measurement and industrial temperature measurement and control.
Model specifications

Model Temperature range Installation thread Cable length Suitable pipe
TS-18B20 -55 ĐẾN 125 None 1.5 tôi
TS-18B20A -55 ~ 125 M10X1 1.5m DN15 ~ 25
TS-18B20B -55 ~ 125 1/2 “G terminal box DN40 ~ 60