| 摘要 |
PROBLEM TO BE SOLVED: To provide a load detection device capable of highly accurate load detection even if a voltage supplied to a load cell or an A/D converter is changed, and enabling an easy maintenance work. SOLUTION: This load detection device 30 comprises the load cell 70 operated by receiving a power supply, for outputting an analog signal of a voltage corresponding to a received load, an amplifier 71 for amplifying the analog signal, an A/D converter reference power source 35 for outputting a first reference voltage, the A/D converter 39 for converting the analog signal outputted from the amplifier 71 into a digital signal based on the first reference voltage, and an offset-gain adjusting circuit 77 for detecting the voltage from an A/D converter reference power source 35, and performing gain adjustment of the amplifier 71 corresponding to the fluctuation quantity of the voltage so that, when the voltage is fluctuated from the first reference voltage, the value of the digital signal converted by the A/D converter 39 becomes the same value as the value of the digital signal when the first reference voltage is applied to the A/D converter 39.
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