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1.发明授权
公开(公告)号：EP1126347B1
公开(公告)日：2007-09-12
申请号：EP00948265.4
申请日：2000-07-27
发明人： OHMI, Tadahiro , IIDA, Seiichi , KAGATSUME, Satoshi, Tokyo Electron Yamanashi Ltd. , HIROSE, Jun, Tokyo Electron Yamanashi Ltd. , FUKASAWA, Kazuo, Tokyo Electron Yamanashi Ltd. , KOIZUMI, Hiroshi, Tokyo Electron Yamanashi Ltd. , NAGAOKA, Hideki, Tokyo Electron Yamanashi Ltd. , UNO, Tomio, Fujikin Incorporated , NISHINO, Kouji, Fujikin Incorporated , IKEDA, Nobukazu, Fujikin Incorporated , DOHI, Ryousuke, Fujikin Incorporated , IDETA, Eiji, Fujikin Incorporated
CPC分类号： G05B23/0235 , G05B23/0256 , G05D7/0635 , Y10T137/0396 , Y10T137/7759 , Y10T137/7761 , Y10T137/8326
摘要： A method for detecting abnormal flow rate by easily detecting an obstruction of an orifice while a fluid pressure flow rate controller using an orifice is controlling the flow rate. The method uses a flow rate controller (FCS) so as to calculate the flow rate Qc on the downstream side when the upstream-side pressure P1 is maintained at a value about twice or more the downstream-side pressure P2 from Qc=KP1 (K: constant) and to control the operation of a control valve (CV) according to a signal Qy representing the difference between the calculated flow rate Qc and a preset flow rate Qs. A testing circuit or flow rate setting circuit provided separately outputs a testing signal ΔQs having a testing amplitude V0 to the control valve (CV). The pressure amplitude V of a pressure variation ΔP1 of the upstream-side pressure P1 occurring in response to the opening/closing of the control valve (CV) is measured. When the pressure amplitude V decreases below a limit amplitude Vt, the obstruction of the orifice is announced, thus implementing the method. If the testing signal ΔQs is superimposed on a steady-state preset flow rate signal Qs0 and outputted together from the testing circuit or the flow rate setting circuit to the control valve (CV), an abnormal flow rate can be detected while controlling the flow rate by using the steady-state preset flow rate signal Qs0.
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2.发明公开
公开(公告)号：EP1126347A1
公开(公告)日：2001-08-22
申请号：EP00948265.4
申请日：2000-07-27
发明人： OHMI, Tadahiro , IIDA, Seiichi , KAGATSUME, Satoshi, Tokyo Electron Yamanashi Ltd. , HIROSE, Jun, Tokyo Electron Yamanashi Ltd. , FUKASAWA, Kazuo, Tokyo Electron Yamanashi Ltd. , KOIZUMI, Hiroshi, Tokyo Electron Yamanashi Ltd. , NAGAOKA, Hideki, Tokyo Electron Yamanashi Ltd. , UNO, Tomio, Fujikin Incorporated , NISHINO, Kouji, Fujikin Incorporated , IKEDA, Nobukazu, Fujikin Incorporated , DOHI, Ryousuke, Fujikin Incorporated , IDETA, Eiji, Fujikin Incorporated
CPC分类号： G05B23/0235 , G05B23/0256 , G05D7/0635 , Y10T137/0396 , Y10T137/7759 , Y10T137/7761 , Y10T137/8326
摘要： A method checks the flow rate for abnormalities while controlling the flow rate of fluid in a pressure-type flow controller FCS using an orifice - the pressure-type flow controller wherein with the upstream pressure P 1 maintained about two or more times higher than the downstream pressure P 2 , the downstream flow rate Q C is calculated by the equation Q C = KP 1 (K: constant) and wherein the control valve CV is controlled on the basis of the difference signal Q Y between the calculated flow rate Q C and the set flow rate Q S . The method comprises, outputting a testing signal ΔQs having a testing amplitude Vo from a testing circuit provided separately or a flow rate setting circuit to the control valve CV, measuring the pressure amplitude V of the variable pressure ΔP1 of the pressure P1 on the upstream side of the orifice that arises in response to actuation of the control valve CV and setting off an alarm for the clogging of the orifice when the pressure amplitude V is smaller than a limit amplitude Vt. If the testing signal ΔQs is superimposed on a steady-state set flow rate signal Qso and outputted to control the valve CV from the testing circuit or the flow rate setting circuit, the flow rate can be checked for abnormalities while controlling the flow rate by the steady-state set flow rate signal Qso.
摘要翻译： 一种方法，检查异常的流速，同时控制在使用于节流孔的压力式流量控制装置FCS的流体的流量 - 压力式流量控制装置worin与上游压力P1保持为下游压力高大约两倍或更多倍 和worin控制阀CV为计算流量QC与设定流量QS之差信号QY的基础上进行控制：P2，下游流量QC由等式QC = KP1（常数K）计算得出。 该方法包括，输出开始一测试信号DELTA Qs的具有从测试电路分开设置的测试振幅VO或流量设定电路向控制阀CV，测量在可变压力DELTA P1的压力P1的压力振幅V 节流孔的上游侧确实产生于响应于控制阀CV的致动和用于节流孔堵塞报警掀起当压力振幅V小于极限振幅Vt的小。 如果测试信号DELTA Qs被叠加在稳态流量设定信号QSO和输出，以控制从所述测试电路或流量设定电路的阀CV，流速可以检查异常，同时控制由流量 稳态设定流量信号QSO。
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