| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce burden and costs and increase safety more than before.SOLUTION: A security system 1 comprises a master unit 2 and a slave unit 3 for performing radio communication with the master unit 2, and controls a state of the master unit 2. The slave unit 3 is wearable on a body and includes a communication section 33 for transmitting a request signal for switching the master unit 2 between a log-out state and a log-in state to the master unit 2 in response to user's operation. The master unit 2 includes: a reception signal intensity measurement section 230 for measuring the reception signal intensity of radio communication with the slave unit 3; a slave unit data table 243 for storing the reception signal intensity measured when the request signal is received, as a threshold value; and a CPU 25 for, when the reception signal intensity measured by the reception signal intensity measurement section 230 becomes less than the threshold value, switching the master unit 2 from the log-in state to the log-out state and, when the reception signal intensity becomes equal to or more than the threshold value, switching the master unit 2 from the log-out state to the log-in state.</p> |
