| 摘要 |
PROBLEM TO BE SOLVED: To reduce installation costs, eliminate a power supply for a risk degree detection sensor, and eliminate experiences and a high degree of knowledge of experts for evaluative determination. SOLUTION: The risk degree detection sensor 10, in which a piezo cable is inserted into a cylindrical outer sheath, and the piezo cable is fixed to the outer sheath with an epoxy-resin adhesive, is connected to an amplifier 36. The amplifier 36 is connected to an input unit 31 of a microcomputer 30. An alarm 40 having an LED is connected to an output unit 34 of the microcomputer 30. When a comparison unit 33 of the microcomputer 30 determines that an amplified voltage V output from the amplifier 36 is not less than a preset set value S and determines the issuance of a warning, the output unit 34 of the microcomputer 30 activates the alarm 40. COPYRIGHT: (C)2010,JPO&INPIT |
