| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a new and improved safety confirmation system which allows the safety of an operator working alone to be continuously monitored and the operator to easily respond to safety confirmation communication. <P>SOLUTION: In the safety confirmation system for safety confirmation of operators, one or more communication terminals carried by one or more operators, a communication terminal held by a work manager and a call server which transmits a call message for safety confirmation to the communication terminal(s) of the operator(s) are mutually connected via a communication channel allowing group communication. The call server transmits a call message to each of call target communication terminals and determines the safety of each operator carrying the call target communication terminal on the basis of a sound level of a response to the call message from each communication terminal. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
