发明名称 |
METHOD FOR SENSING CONDUCTIVITY AND FLOW RATE OF A LIQUID IN A TUBE |
摘要 |
An electromagnetic flowmeter with voltage-amplitude conductivity-sensing function for a liquid in a tube includes a first microprocessor, a transducer, flow-sensing device, an exciting-current generating device, a voltage-amplitude conductivity-sensing device, and a switch. The transducer includes coils and sensing electrodes. The switch is electrically connected to the first microprocessor and the sensing electrode. The switch is selectively connected to the flow-sensing device or the voltage-amplitude conductivity-sensing device according to the signals sent from the microprocessor. The microprocessor makes the exciting-current generating device to generate an exciting current when the switch is connected to the flow-sensing device. The microprocessor makes the exciting-current generating device to stop generating exciting current and computing conductivity of liquid when the switch is electrically connected to the voltage-amplitude conductivity-sensing device. |
申请公布号 |
US2017115147(A1) |
申请公布日期 |
2017.04.27 |
申请号 |
US201715397188 |
申请日期 |
2017.01.03 |
申请人 |
FINETEK Co., Ltd. |
发明人 |
CHANG Ming-Hui;CHOU Chi-Chih;CHEN Chun-Ju;CHEN Chun-Hung;HOU Yi-Liang |
分类号 |
G01F1/60;G01F1/58;G01N27/07 |
主分类号 |
G01F1/60 |
代理机构 |
|
代理人 |
|
主权项 |
1. A method for sensing conductivity and flow rate of a liquid in a tube, comprising:
(a) generating a sine oscillation voltage pulse; (b) calculating a conductivity via the sine oscillation voltage pulse; (c) determining whether the conductivity is smaller than a predetermined value; (d) determining whether a tube is empty; (e) after the step (d), adjusting current value of a constant current; and (f) sensing flow rate of the liquid. |
地址 |
New Taipei City TW |