| 摘要 |
PURPOSE:To decrease the total number of connecting lines by leading out a first connecting line from one end of each of a plurality of resistor type sensors which are arranged in close proximity, shorting the other ends, and leading out the second and third connecting lines from the shorted parts. CONSTITUTION:When the resistance change in a strain gage 1a is measured with a measuring device 5a, a second end Ta2 of the gage 1a is connected to the measuring device 5a by a three-line method. The second end Ta2 is used as one output terminal of a Wheatstone bridge 7. The resistance change of the gage 1a is converted into the output voltage through the bridge 7. The output voltage is amplified in an amplifier 10 and measured. When the resistance change in a platinum temperature measuring resistor 1b is measured with a measuring device 5b, the second end Tb2 of the resistor 1b is connected to the second end Ta2 of the gage 1a which is in turn connected to the measuring device 5b by the three-line method. The second end Tb2 is used as one output terminal of the bridge 7. The resistance change of the resistor 1b is measured by the same way. Thus, the total number of the connecting lines can be de creased. |
