阅读说明：本技术 一种目标辐射率测量方法及装置 (Target radiance measuring method and device ) 是由 胡飞 苏金龙 伍宏飞 于 2019-09-26 设计创作，主要内容包括：本发明公开了一种目标辐射率测量方法及装置,方法包括：将板状吸波材料一端固定、另一端绕该端旋转,调整辐射计天线口面中轴线与吸波材料表面间的夹角,测得吸波材料辐射电压；将金属和待测目标先后设置在吸波材料表面相同位置,测得一一对应的辐射电压；将吸波材料作为环境背景对三个辐射电压差值分析,得到待测目标的辐射率；其中吸波材料辐射率为0.999～1,金属和待测目标表面积相等且不大于吸波材料。本发明在测量时吸波材料不动,将金属和待测目标先后放在吸波材料相同位置得三者辐射电压,操作简单。另外吸波材料辐射率近乎1,但这会导致吸波材料较厚,将吸波材料作为环境背景进行差值分析,可完全消除厚度对测量带来的误差,极大提高测量精度。(The invention discloses a method and a device for measuring target radiance, wherein the method comprises the following steps: fixing one end of a plate-shaped wave-absorbing material, rotating the other end of the plate-shaped wave-absorbing material around the end, adjusting an included angle between a central axis of an antenna aperture surface of a radiometer and the surface of the wave-absorbing material, and measuring the radiation voltage of the wave-absorbing material; sequentially arranging metal and a target to be measured at the same position on the surface of the wave-absorbing material, and measuring the radiation voltage corresponding to each other; analyzing the difference value of the three radiation voltages by taking the wave-absorbing material as an environmental background to obtain the radiance of the target to be detected; the radiation rate of the wave-absorbing material is 0.999-1, and the surface areas of the metal and the target to be detected are equal and not larger than the wave-absorbing material. The wave-absorbing material is fixed during measurement, the metal and the target to be measured are successively placed at the same position of the wave-absorbing material to obtain the radiation voltage of the three, and the operation is simple. In addition, the radiation rate of the wave-absorbing material is nearly 1, but the wave-absorbing material is thicker, the wave-absorbing material is used as an environment background for difference analysis, errors caused by the thickness to the measurement can be completely eliminated, and the measurement precision is greatly improved.)

1. A target radiance measurement method, comprising:

fixing one end of a plate-shaped wave-absorbing material, and rotating the other end of the plate-shaped wave-absorbing material around the fixed end to adjust an included angle between a central axis of an antenna aperture surface of a radiometer and the surface of the plate-shaped wave-absorbing material, and measuring the radiation voltage of the plate-shaped wave-absorbing material;

sequentially arranging sheet metal and a sheet target to be measured at the same position on the surface of the plate-shaped wave-absorbing material, and measuring radiation voltages corresponding to each other;

taking the plate-shaped wave-absorbing material as an environmental background, and calculating the difference value of the three radiation voltages to obtain the radiance of the sheet-shaped target to be measured;

the radiation rate of the plate-shaped wave-absorbing material is 0.999-1, and the surface areas of the sheet metal and the sheet object to be detected are equal to each other and not larger than the surface area of the plate-shaped wave-absorbing material.

2. The method for measuring the target radiance of claim 1, wherein a fixed plane at one end of the plate-shaped wave-absorbing material is parallel to a central axis of the antenna aperture surface.

3. The method as claimed in claim 1, wherein the central axis of the antenna aperture of the radiometer passes through the sheet metal and the center of the sheet target.

4. The method for measuring the target radiance of claim 1, wherein the physical temperatures of the plate-shaped wave-absorbing material, the sheet metal and the sheet target to be measured are the same, and the method comprises the following steps: and arranging the plate-shaped wave-absorbing material, the sheet metal and the sheet object to be detected in the same temperature environment.

5. The method for measuring the target radiance of claim 1, wherein the plate-shaped wave-absorbing material is pyramid foam, and the thickness of the pyramid foam is centimeter level.

6. The method of claim 1, wherein the sheet metal and the sheet target have a thickness of millimeter or less.

7. The method as claimed in claim 1, wherein the projected area of the main beam of the radiometer on the surface of the wave-absorbing material completely covers at least the sheet metal or the sheet object to be measured.

8. A method as claimed in any one of claims 1 to 7, wherein said difference is calculated by the expression:

in the formula, V_APE is the radiation voltage and radiation rate of the sheet-like object to be measured, V_APr、e_rIs the radiation voltage and emissivity, V, of the sheet metal_APb、e_bThe radiation voltage and the radiation rate of the plate-shaped wave-absorbing material.

9. The method for measuring the target radiance of claim 8, wherein the radiance of the sheet metal is 0, and the radiance of the plate-shaped wave-absorbing material is 1.

10. A target radiance measurement device comprising: a fixed member, a processor, a radiometer in the target radiance measuring method of any one of claims 1 to 9, a plate-shaped wave absorbing material arranged at a distance from the radiometer, and a sheet metal;

the fixing piece is used for fixing the sheet metal and the sheet target to be detected on the surface of the plate-shaped wave-absorbing material in sequence; the processor is used for carrying out difference analysis in a target radiance measuring method according to any one of claims 1 to 9 on the basis of three radiance voltages measured by the radiometer to obtain the radiance of the sheet-shaped target to be measured.