A wireless thermocouple

Abstract

The invention discloses a wireless thermocouple, which includes a receiving host, a protective cover, an electronic compartment, a circuit board and a thermocouple. The circuit board is equipped with a data acquisition module, a data front-end processing module, a data processing module, and a wireless communication module. The thermoelectric force is collected from the thermocouple through the data acquisition module, and then it is amplified and filtered by the data front-end processing module. , and then through the data processing module, the analog signal is converted into a digital signal, combined with the temperature compensation signal of the cold junction and the temperature characteristics of the thermocouple, the thermal electromotive force is directly converted into a temperature, and sent to the wireless communication module. The wireless communication module is set according to the preset According to the data transmission requirements and communication protocol, the data is transmitted to the receiving host, and the receiving host receives and forwards the data to the cloud platform, realizing the grid control of temperature.

Description

technical field [0001] The invention relates to a wireless thermocouple. Background technique [0002] In industrial production process, temperature is one of the important parameters that need to be measured and controlled. In temperature measurement, thermocouple or thermal resistance is widely used. It has many advantages such as simple structure, convenient manufacture, wide measurement range, high precision, small inertia and easy remote transmission of output signal. In addition, since the thermocouple or thermal resistance is an active sensor, no external power supply is required for measurement, and the energy consumption is low, so it is often used to measure the temperature of the gas or liquid in the furnace, the pipeline, and the surface temperature of the solid. [0003] Existing thermocouples or thermal resistances have different shapes due to needs, but their basic composition and structure are roughly the same, usually consisting of main parts such as therma...

AI Technical Summary

Problems solved by technology

[0004] At the same time, in the prior art, it often takes long wires to transmit the weak thermal electromotive force signal sensed by the thermocouple to the display instrument, and the signal is an analog signal, so the thermal electromotive force signal is easily disturbed during the transmission process, affecting the data. Reliability; in addition, the cost of wire transmission is high and the maintenance is relatively difficult; at the same time, analog signals are not convenient for the use of data by the control system

At the same time, the existing technology uses compensation wires for cold junction compensation, but its structure is complex and cannot fully accurately reflect the actual temperature of the cold junction.

If the temperature of the measured target is relatively high, the temperature is easily transmitted to the cold end, resulting in a small difference between the temperature of the cold end and the hot end. Even if the temperature compensation method is used, it is difficult to reflect the testing advantages of the thermocouple. problems such as reduced service life

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