Digital photoelectric temperature sensor

Abstract

The invention discloses a digital photoelectric temperature sensor which comprises a temperature-sensing pipe (1), a photoelectric conversion module (2) and a digital processing module (3). The blind end of the temperature-sensing pipe (1) is a temperature-sensing head capable of being placed in a temperature field to be measured and generating heat radiation light beams. The photoelectric conversion module (2) comprises a light pipe (20), a focus lens (21), a light beam plate (22), a beam-limiting plate (23) and a photoelectric conversion element (24), wherein the focus lens (21), the light beam plate (22), the beam-limiting plate (23) and the photoelectric conversion element (24) are arranged in the light pipe (20). The digital processing module (3) comprises a module box body, a multi-section compensation adjustment submodule (31), a standard signal conversion submodule (32) and a network protocol conversion submodule (33), wherein the multi-section compensation adjustment submodule (31), the standard signal conversion submodule (32) and the network protocol conversion submodule (33) are arranged in the module box body. The light pipe (20) is formed by a first connection pipe (20A), a second connection pipe (20B) and a third connection pipe (20C). According to the digital photoelectric temperature sensor, the measurement accuracy is greatly improved by utilizing subsection error automatic compensation technique, and standard signal processing and network protocol conversion are utilized, thereby realizing digitization and networked transmission.

Description

technical field [0001] The invention relates to the technical field of temperature sensors, in particular to a digital photoelectric temperature sensor. Background technique [0002] Many productions in the industry are inseparable from high-temperature equipment, and these high-temperature equipment usually run continuously for a long time, resulting in overloading of their working temperature. Industrial production, especially smelting, power production, high-temperature heat treatment of metal materials and other industries have strict requirements on temperature process parameters. The requirements are very strict, which requires temperature detection and sensing equipment with excellent performance, high working stability, and strong anti-interference ability. [0003] At present, platinum-rhodium thermocouples or other high-temperature thermocouples are used to measure temperature in many production processes. When platinum-rhodium thermocouples or other high-temperatu...

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Problems solved by technology

[0003] At present, platinum-rhodium thermocouples or other high-temperature thermocouples are used to measure temperature in many production processes. When platinum-rhodium thermocouples or other high-temperature thermocouples work under high temperature, high pressure and harmful medium conditions, the wires are easily affected by various media at high temperatures. Under the penetration and gradual deterioration, the measurement error gradually increases (the error can reach tens of degrees or higher), making the production process deviate from the technical requirements, affecting the product quality and even causing the product to be scrapped. At the same time, the even wire will soon become brittle and the surface Damage caused by oxidation, deterioration and other factors

In practical applications, the high failure rate of even wires, frequent replacements, affect the normal production, and because platinum and rhodium are precious metals, the price is high, causing a lot of cost consumption

[0004] With the development of optical communication technology, many photoelectric temperature sensing products are in the research and development stage. From a technical point of view, there are different viewpoints and implementation methods. The measurement error is above 0.5%-1.0%, and the measurement accuracy is not high. Manufacturers can only carry out inspection or calibration with their own special display instruments. There is no uniform manufacturing standard and poor product compatibility, which is not conducive to widespread promotion and application, so that it can be used effectively

In addition, the existing sensors are limited by the temperature measurement range or accuracy, and cannot meet the needs of different temperature fields to be measured. Users must equip many temperature sensing devices for temperature measurement, which is troublesome and expensive to choose.

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