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在空间科学技术、高能粒子、受控热核反应和高速风洞等尖端科学技术研究中,出现了特殊环境下的真空度测量,尤其对非稳定气流和非均匀气流的压强测量,提出了一些新的要求和探测中的特殊问题。较为关心的问题之一,是真空计的响应速度,一般要求具有快速响应特性。但是,要求真空计具有快速反应只是问题的一个方面,而实际上有些真空计如热丝、热电偶和热电堆等热传导真空计,其本身固有一定的热惯性。由于它们具有结构简单、体积和功耗小等特点,常被用来测量非稳定气流的压强。这就要求不但测
In the fields of space science and technology, high-energy particles, controlled thermonuclear reaction and high-speed wind tunnel and other cutting-edge science and technology research, there has been a vacuum measurement under special circumstances, especially for unsteady flow and non-uniform flow pressure measurement, The requirements and probing of special problems. One of the more concerned issues is the response speed of the vacuum gauge, which generally requires fast response characteristics. However, requiring a vacuum gauge to have a quick response is only one aspect of the problem, and in fact some gauge gauges, such as hot wires, thermocouples, and thermopiles, inherently have thermal inertia. Because of their simple structure, small size and low power consumption, they are often used to measure the pressure of unsteady flow. This requires not only test