A digital multi-point temperature measurement system and its realization method

Abstract

The invention relates to a digital multi-point temperature measuring system and an achieving method. A power module is respectively connected with a digital temperature sensor, a computing control module, a communication module, an alarming module and a display module, the digital temperature sensor is respectively connected with the communication module, the alarming module and the display module through the computing control module, and the communication module is connected with a computer; after an ID number, an alarming line, an alarming return difference and an alarming method of an instrument are set and the sensor is logged in, the instrument can work. Data of the sensor are converted into temperature numerical value through a single-chip microcomputer and compared with the set alarming line, the temperature value is transmitted to the display module to be displayed by the single-chip microcomputer, if alarming is needed, the single-chip microcomputer controls the alarming module to give out an alarm, and if communication is needed, the single-chip microcomputer controls the communication module to be in communication with the computer. Thus, stability of signals in the transmission process is improved, the size of the instrument is reduced, requirements for a power source are lowered, mutual effects between circuits are reduced, and temperature information can be observed remotely.

Description

technical field [0001] The invention relates to a digital multi-point temperature measurement system and its realization method, which are used for the monitoring system and its realization method of measuring, displaying and controlling multi-point temperature in the case of product production and material storage. Background technique [0002] At present, the temperature measuring instruments used in industrial control, material storage and other occasions mainly use thermocouples and thermal resistances to detect temperature, and then convert the analog signals to display devices such as instruments. Thermocouples and thermal resistors sense temperature changes to generate analog signals. The analog signals are transmitted to the instrument through wires. The analog signals need to be converted into digital signals through the amplification circuit and A / D conversion circuit in the instrument, and then sent to the single-chip microcomputer. The single-chip microcomputer is...

AI Technical Summary

Problems solved by technology

Thermocouples and thermal resistors sense temperature changes to generate analog signals. The analog signals are transmitted to the instrument through wires. The analog signals need to be converted into digital signals through the amplification circuit and A / D conversion circuit in the instrument, and then sent to the single-chip microcomputer. The single-chip microcomputer is then processed. The control shows that the temperature signal is easily affected by the resistance and inductance of the wire before it is transmitted from the sensor to the circuit, resulting in errors. Therefore, there are strict requirements on the thickness and length of the wire when using thermocouples and thermal resistance for temperature measurement. , is not conducive to long-distance transmission, and the circuit in the instrument is large, the circuit board structure is large, the installation size of the instrument is large, and the space at the installation position cannot be too small, and the existing multi-point thermocouple or multi-point thermal resistance is mainly To measure the temperature values ​​on different vertical gradients, the assembly type or armored type with protective tube packaging outside the temperature sensing element is used, but because the protective tube is made of metal material, the degree of bending is small, and the requirements for large lateral distance and high degree of bending are much higher. Point measurement is not easy to achieve

In this way, during use, the distance, space size, etc. are limited, and it is not convenient to measure and view

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