| 摘要 |
<p>The instrument consists of two parallel inter-insulated plate elements (1 and 2) on figure 1, between the two plates and in thermal contact with both two peltier-elements (3 and 4) have been affixed. This sensor is connected with a control and measuring device of known construction over the input terminals of which there is applied a voltage that is generate across the poles of one of the peltier-elements when, because of radiant asymmetry, a temperature difference arises between (1 and 2). In the control unit this voltage is transformed in a known way to a current proportional to the voltage which is led through the other peltier-element. The temperature difference thus occured between the two sides of the peltier-element will, when the element is rightly turned, neutralize the temperature difference between the two plate elements caused by the radiation so that these elements will adopt the same temperature. The required current is proportional to the radiant asymmetry perpendicularly at the sensor element.</p> |
