Tubular thermopile sensor

Abstract

The invention discloses a tubular thermopile sensor. The device comprises a shell, a first cold and hot temperature sensing tube, a second cold and hot temperature sensing tube, a fixture and a thermopile assembly, the shell is provided with a first through hole, a second through hole, a third through hole and a fourth through hole. The first through hole and the second through hole are oppositelyformed; the third through hole and the fourth through hole are oppositely formed; the first cold and hot temperature sensing pipe is arranged in the first through hole and the second through hole ina penetrating manner; the second cold and hot temperature sensing pipe is arranged in the third through hole and the fourth through hole in a penetrating manner; the fixture is fixedly connected withthe inner wall of the shell; the first cold and hot temperature sensing pipe and the second cold and hot temperature sensing pipe are fixedly installed in the clamp. The first cold and hot temperaturesensing pipe is parallel to the second cold and hot temperature sensing pipe; a first opening is formed in the pipe wall of the first cold and hot temperature sensing pipe, a second opening is formedin the pipe wall of the second cold and hot temperature sensing pipe, the thermopile assembly is fixedly installed between the first opening and the second opening, and on the aspect of fluid temperature difference measurement, quick and accurate measurement of fluid temperature differences of different temperatures is achieved.

Description

technical field [0001] The present disclosure relates to the technical field of sensors, in particular to a tubular thermopile sensor. Background technique [0002] At present, the two principles of thermistor and thermocouple are widely used in the production of temperature sensors. The temperature sensor made of thermistor has high temperature detection sensitivity and can measure small temperature difference, but can only obtain high linearity in a narrow temperature range; the temperature sensor made of thermocouple has a wide range The temperature measurement range has high linearity, but the detection sensitivity of a single thermocouple is relatively low. Generally, multiple thermocouples are used to form a thermopile to increase its temperature detection sensitivity. This type of thermopile temperature sensor, because the minimum temperature difference it can detect is 1 / n of a single thermocouple, its temperature measurement error is inversely proportional to the s...

AI Technical Summary

Problems solved by technology

The non-contact infrared thermopile structure has the advantages of durability, low price, convenient use, and wide coverage, but its measurement sensitivity is low, low precision, requires a reference temperature, slow response speed, and is easily affected by the environment. , light, electricity, airflow, vibration, etc. will affect the accuracy of its temperature measurement

The contact thermopile structure can achieve faster response speed and higher measurement accuracy because it is in direct contact with the object to be measured. The external temperature control and other packaging structures can reduce its influence from environmental factors. The existing During the dynamic temperature measurement process of the fluid, the contact sensor adopts multi-point distributed temperature measurement, which has a large measurement error

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