今天,尽管以微处理器和电子计算机为基础的装置已在自动控制领域迅速占据优势,但气动仪表在检测方面仍起着重要作用。例如许多过程控制装置中,继续使用着有气动输出信号的流量、压力和液面变送器。为了沟通气、电信号之间的联系,近年来,这两种转换器在技术上都有了很大的进展。气电转换器大量使用在老的气动仪表装置的更新改造上。这样做的最主要原因是出于经济上的考虑。一个装置在现有的气动变送器上加装气电转换器要比将它们全部换成电动变送器便宜得多。一台架装的气电转换 Today, while microprocessor-based and computer-based devices have rapidly gained prominence in the field of automation, pneumatic instrumentation still plays an important role in testing. For example, many process control devices continue to use flow, pressure and level transmitters with pneumatic output signals. In order to communicate the connection between gas and electric signals, in recent years, both converters have made great technical progress. A large number of electrical and pneumatic converters used in the renovation of the old pneumatic instrumentation on. The main reason for this is because of economic considerations. It is far less expensive to add a gas-to-air converter to an existing pneumatic transmitter than to replace all of them with electric transmitters. A rack of gas and electricity conversion