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21. 发明授权

US4254657A Gas detector and meter employing indicator tubes 失效
标题翻译：气体探测器和仪表采用指示灯管
公开(公告)号：US4254657A
公开(公告)日：1981-03-10
申请号：US41805
申请日：1979-05-23
申请人： Kurt Leichnitz , Peter Naumann
发明人： Kurt Leichnitz , Peter Naumann
IPC分类号： G01N1/00 , F04B49/00 , G01N1/24 , G05D16/20
CPC分类号： G01N1/24 , G05D16/2066
摘要： A gas detecting and measuring device with which the gas or air to be examined is taken into a testing or measuring vessel such as an indicator tube by means of a feed system comprises an electrical motor driven suction pump and a pressure gauge connected thereto for pumping the gas to be tested through a connecting line. The connecting line includes the suction pump and a volume sensor provided in addition to a pressure sensor. The differential signal formed of the volume signal is converted in a characteristic generator to a desired pressure signal and the actual pressure signal from the pressure sensor is applied to a speed governor for the suction pump motor so that the suction pump is controlled to effect equalizing the actual pressure signal with a desired pressure signal.
摘要翻译：一种气体检测和测量装置，其中待检查的气体或空气通过进料系统被带入测试或测量容器，例如指示器管，包括电动机驱动的抽吸泵和连接到其上的压力计，用于泵送气体通过连接线进行测试。连接线包括抽吸泵和除压力传感器之外提供的体积传感器。由体积信号形成的差分信号在特征发生器中被转换为期望的压力信号，并且来自压力传感器的实际压力信号被施加到用于抽吸泵马达的调速器，使得吸入泵被控制以实现均衡具有所需压力信号的实际压力信号。

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