Mitsubishi Electric Corporation

Yoshitomo Asano

Hiroo Kanamaru

Keiichi Yato

Hidetoshi Harada

A risk measurement system according to an embodiment includes a measurement unit that obtains a distance between a mechanical device and an operator; a control device that controls the mechanical device, a display device; a risk table database that has a risk table indicating a risk value that depends on a size of damage due to a risk, a frequency of access to the mechanical device according to an operation mode, and a risk avoiding possibility; and a risk measurement device that obtains the risk value based on the avoiding possibility obtained based on the distance, the frequency of access obtained based on the operation mode of the mechanical device acquired from the control device, and the risk table, records temporal changes of the risk value, and displays the temporal changes of the risk value on the display device.

Risk measurement system

A safety computing device includes a processor and a memory. The memory includes a first memory area and a second memory area having an address different from the first memory area. The processor includes an execution control unit performing a first process including the program process on input data written in the first memory area, and a second process including the program process on input data written in the second memory area and addition of redundancy code to output data written in the second memory area, a result collating unit collating output data to which redundancy code is added in the first and second processes, a computation diagnosis unit diagnosing presence or absence of failure in the processor and the memory, and an abnormality processing unit that, when an abnormality is detected by at least one of redundancy check, collation, and diagnosis, stops outputting output data.

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Chiyoda-ku, Japan

Yoshitomo Asano