首页>
外文期刊>Sensors
>The 1-wire thermocouple: a standard thermocouple can be combined with a lithium ion monitor chip to create a smart sensor that communicates with a PC or microcontroller over a single twisted-pair cable
【24h】
The 1-wire thermocouple: a standard thermocouple can be combined with a lithium ion monitor chip to create a smart sensor that communicates with a PC or microcontroller over a single twisted-pair cable
展开▼
机译：The 1-wire thermocouple: a standard thermocouple can be combined with a lithium ion monitor chip to create a smart sensor that communicates with a PC or microcontroller over a single twisted-pair cable
This article describes a method of measuring temperatures using conventional thermocouples that are directly digitized at the cold junction. The transducer is based on a recently introduced multifunction chip that communicates with a PC (or microcontroller) master over a single twisted-pair line. A significant advantage of the new transducer is that each has a unique 64-bit address that permits positive identification and selection by the bus master. Because of this unique ID address, multiple sensors may share the same net and software can automatically recognize and process data from any given sensor. Although information associated with the thermocouple may be stored within the chip itself ("tagging"), the unique ID also allows reference data to be stored at the bus master. By design, all communication is handled by a single master that executes Touch Memory Executive (TMEX) protocol to control the 1-Wire thermocouple, transmitting both bidirectional data and power over the single twisted-pair cable. Data transfers are processed half duplex and bit sequential using short and long time slots to encode the binary ones and zeros respectively, while power is transmitted during communication idle times 1,2.
展开▼
