Transient high temperature field heat flux passive sensor based on discoloration characteristics of thermally sensitive coating

Abstract

The invention discloses a transient high temperature field heat flux passive sensor based on the discoloration characteristic of a thermosensitive coating. The invention consists of a packaging shell, a heat conduction element, a thin film heat flux sensor, a heat sensitive coating and a movable bolt. The thin-film heat flux sensor and the heat-sensitive coating are located in the packaging shell, and the heat-conducting element, the thin-film heat flux sensor, the heat-sensitive coating, and the packaging shell are installed coaxially. The two sides of the thin-film heat flux sensor are respectively attached to the heat-conducting element and the heat-sensitive coating. The heat conduction element encapsulates the encapsulation shell through movable bolts. The heat-sensitive coating adopts thermochromic materials, which undergo irreversible discoloration in different degrees according to different heat. The invention uses the heat-sensitive coating to quantitatively convert the heat of the transient high-temperature field into the degree of color change, realizes the rapid quantitative passive measurement of the heat flux of the transient high-temperature field, and solves the problem that the measurement accuracy of the existing temperature-measuring sensor is affected by the measured temperature. The object is greatly affected, the response speed is insufficient, and the problem of interference of the measured high temperature field occurs.

Description

technical field [0001] The invention belongs to the field of measurement and detection, and specifically relates to a sensor for measuring transient high-temperature field heat flux, which is a passive sensor for measuring transient high-temperature field heat flux by utilizing the discoloration characteristic of a thermosensitive coating. Background technique [0002] At present, with the development of science and technology, transient high-temperature fields are often formed in some application scenarios (transient high-temperature fields refer to the existence of high-temperature fields for seconds or even milliseconds), such as explosive explosions, gas explosions, mine blasting, In these cases, measuring the heat flux of the transient high-temperature field can effectively reflect the damage ability of the high-temperature field to the surrounding environment, so it is of great significance to practical applications. Therefore, the measurement of the heat flux of the tr...

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Problems solved by technology

[0010] The technical problem to be solved by the present invention is to provide a transient high-temperature field heat flux passive measurement sensor based on the thermal discoloration characteristics of the thermal coating, which solves the problem that the existing non-contact temperature measurement method is less affected by the emissivity of the measured object. Large, easily affected by other factors, the measured temperature is the surface temperature of the object, and the surrounding medium is easy to cause measurement errors; make up for the lack of response speed of the existing contact temperature measurement method, and the interference of the measured high-temperature field caused by contact with the measured object shortcoming

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