Patent ID: 8717150

Claim:
An alarming device comprising: a battery power supply; a sensor section that outputs an anomaly detection signal in a case of detecting an anomaly; an alert section that outputs an anomaly alarm based on the anomaly detection signal; a reception circuit section that includes a signal strength measurement section and receives an event signal from another alarming device; a transmission circuit section that transmits the event signal to the other alarming device; an anomaly monitoring section that, when the sensor section has detected an anomaly, causes the alert section to output the anomaly alarm based on the anomaly detection signal and causes the transmission circuit section to transmit the event signal according to the anomaly of the alarming device to the other alarming device, and on the other hand, when the reception circuit section has received the event signal according to an anomaly of the other alarming device from the other alarming device, causes the alert section to output the anomaly alarm; and a communication control section that judges whether or not the following predetermined events occur: a reduction in a voltage of the battery power supply to a predetermined value or less; and an anomaly of the transmission circuit section or the reception circuit section, wherein the communication control section performs communication control by adjusting the transmission to reduce current consumption and reception of the event signal by the transmission circuit section and the reception circuit section when at least one of the predetermined events is detected, the event signal is a signal which includes a transmission code, a group code and an event code, and is mutually transmitted and received wirelessly, and the alarming device continues monitoring an anomaly so as to output an anomaly alarm upon detection of an anomaly, after the communication control by the communication control section.