Measurement device and measurement method for measuring temperature and emissivity of a measured surface

A measurement device for measuring a temperature and an emissivity of a measured surface, comprising:

• a reflection converter, an optical receiver, a data processor, and a driving device, wherein the optical receiver is coupled to the reflection converter and is configured to receive radiation light emitted from a measured surface and passing through the reflection converter and convert the radiation light into an electrical signal, and wherein the data processor is coupled to the optical receiver and is configured to receive the electrical signal and to determine a temperature and an emissivity of the measured surface according to the electrical signal;
• wherein the reflection converter comprises a reflector having a through hole, and an absorber tube which is movably arranged with respect to the reflector in order to shift the absorber tube between a first measurement position and a second measurement position;
• wherein in the first measurement position, a light incident end of the absorber tube is positioned in the reflector by inserting the absorber tube into the through hole, and the light incident end of the absorber tube approaches or contacts the measured surface, such that the optical receiver receives inherent radiation light emitted from the measured surface and forms a first electrical signal;
• wherein in the second measurement position, the light incident end of the absorber tube is positioned at the through hole or outside the through hole, such that the optical receiver receives the inherent radiation light emitted from the measured surface and reflective radiation light between a reflection surface of the reflector and the measured surface and forms a second electrical signal;
• wherein the data processor is configured to determine a temperature and an emissivity of the measured surface according to the first electrical signal and the second electrical signal;
• and
• wherein the driving device comprises an actuating device drivingly connected with the absorber tube to shift the absorber tube between the first measurement position and the second measurement position.