| 摘要 |
PURPOSE:To perform high-precision load detection and to realize a lowered price by forming a wheatstone bridge circuit and an amplifying circuit on a beam body on which a load to be measured operates. CONSTITUTION:An insulating film 10 is formed directly over the entire surface of a beam body 1. On this insulating film 10, strain gauge resistor patterns 11- 14, a resistor patterns 15-18 for an amplifying circuit, a resistor pattern 19 for span adjustment, and an electrode lead pattern 20 are provided directly and a semiconductor chip 21 for the amplifying circuit is adhered. Then, the electrode lead pattern 20 is connected mutually to the strain gauge resistor patterns 11-14 to form a Wheatstone bridge circuit. The chip 21 forms the amplifying circuit together with the resistor patterns 15-18 for the amplifying circuit. Thus, external noises to the amplifying circuit are reduced to perform high-precision load detection, and the price is reduced. |
