| 摘要 |
<p>The detecting device according to the present invention comprises a first linear-connected circuit portion including an electrical detecting element (277) the resistance value of which varies according to changes in an object to be detected and a variable voltage dividing circuit (542) connected in series to said detecting element (277), said variable voltage dividing circuit (542) having at least two resistance elements (R1, R2, R3, R4) and at least one switching means (Tr1, Tr2, Tr3) for selectively varying the resistance value of the variable voltage dividing circuit (542), a direct-current power supply (E1) for applying direct-current power to said first linear-connected circuit portion, a switching control means (538) for maintaining said switching means (Tr1, Tr2, Tr3) of said variable voltage dividing circuit (542) in conduction for a predetermined period of time with a predetermined cycle, and a comparison means (540) for comparing a first divided voltage at a point of connection between said detecting element (277) and said variable voltage dividing circuit (542) in said first linear-connected circuit with a standard voltage.</p> |
